drivers/staging/meilhaus/me4600_ao.c

   1 /**
   2  * @file me4600_ao.c
   3  *
   4  * @brief ME-4000 analog output subdevice instance.
   5  * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
   6  * @author Guenter Gebhardt
   7  * @author Krzysztof Gantzke    (k.gantzke@meilhaus.de)
   8  */
   9
  10 /*
  11  * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
  12  *
  13  * This file is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #ifndef __KERNEL__
  29 #  define __KERNEL__
  30 #endif
  31
  32 ///Common part. (For normal and Bosch builds.)
  33
  34 /* Includes
  35  */
  36
  37 #include <linux/module.h>
  38
  39 #include <linux/slab.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/io.h>
  42 #include <linux/uaccess.h>
  43 #include <linux/types.h>
  44 #include <linux/version.h>
  45 #include <linux/interrupt.h>
  46 #include <linux/delay.h>
  47
  48 #include "medefines.h"
  49 #include "meinternal.h"
  50 #include "meerror.h"
  51
  52 #include "medebug.h"
  53 #include "meids.h"
  54 #include "me4600_reg.h"
  55 #include "me4600_ao_reg.h"
  56 #include "me4600_ao.h"
  57
  58 /* Defines
  59  */
  60
  61 static int me4600_ao_query_range_by_min_max(me_subdevice_t *subdevice,
  62                                             int unit,
  63                                             int *min,
  64                                             int *max, int *maxdata, int *range);
  65
  66 static int me4600_ao_query_number_ranges(me_subdevice_t *subdevice,
  67                                          int unit, int *count);
  68
  69 static int me4600_ao_query_range_info(me_subdevice_t *subdevice,
  70                                       int range,
  71                                       int *unit,
  72                                       int *min, int *max, int *maxdata);
  73
  74 static int me4600_ao_query_timer(me_subdevice_t *subdevice,
  75                                  int timer,
  76                                  int *base_frequency,
  77                                  long long *min_ticks, long long *max_ticks);
  78
  79 static int me4600_ao_query_number_channels(me_subdevice_t *subdevice,
  80                                            int *number);
  81
  82 static int me4600_ao_query_subdevice_type(me_subdevice_t *subdevice,
  83                                           int *type, int *subtype);
  84
  85 static int me4600_ao_query_subdevice_caps(me_subdevice_t *subdevice,
  86                                           int *caps);
  87
  88 static int me4600_ao_query_subdevice_caps_args(struct me_subdevice *subdevice,
  89                                                int cap, int *args, int count);
  90
  91 #ifndef BOSCH
  92 /// @note NORMAL BUILD
  93 /// @author Krzysztof Gantzke   (k.gantzke@meilhaus.de)
  94 /* Includes
  95  */
  96
  97 # include <linux/workqueue.h>
  98
  99 /* Defines
 100  */
 101
 102 /** Remove subdevice.
 103 */
 104 static void me4600_ao_destructor(struct me_subdevice *subdevice);
 105
 106 /** Reset subdevice. Stop all actions. Reset registry. Disable FIFO. Set output to 0V and status to 'none'.
 107 */
 108 static int me4600_ao_io_reset_subdevice(me_subdevice_t *subdevice,
 109                                         struct file *filep, int flags);
 110
 111 /** Set output as single
 112 */
 113 static int me4600_ao_io_single_config(me_subdevice_t *subdevice,
 114                                       struct file *filep,
 115                                       int channel,
 116                                       int single_config,
 117                                       int ref,
 118                                       int trig_chan,
 119                                       int trig_type, int trig_edge, int flags);
 120
 121 /** Pass to user actual value of output.
 122 */
 123 static int me4600_ao_io_single_read(me_subdevice_t *subdevice,
 124                                     struct file *filep,
 125                                     int channel,
 126                                     int *value, int time_out, int flags);
 127
 128 /** Write to output requed value.
 129 */
 130 static int me4600_ao_io_single_write(me_subdevice_t *subdevice,
 131                                      struct file *filep,
 132                                      int channel,
 133                                      int value, int time_out, int flags);
 134
 135 /** Set output as streamed device.
 136 */
 137 static int me4600_ao_io_stream_config(me_subdevice_t *subdevice,
 138                                       struct file *filep,
 139                                       meIOStreamConfig_t *config_list,
 140                                       int count,
 141                                       meIOStreamTrigger_t *trigger,
 142                                       int fifo_irq_threshold, int flags);
 143
 144 /** Wait for / Check empty space in buffer.
 145 */
 146 static int me4600_ao_io_stream_new_values(me_subdevice_t *subdevice,
 147                                           struct file *filep,
 148                                           int time_out, int *count, int flags);
 149
 150 /** Start streaming.
 151 */
 152 static int me4600_ao_io_stream_start(me_subdevice_t *subdevice,
 153                                      struct file *filep,
 154                                      int start_mode, int time_out, int flags);
 155
 156 /** Check actual state. / Wait for end.
 157 */
 158 static int me4600_ao_io_stream_status(me_subdevice_t *subdevice,
 159                                       struct file *filep,
 160                                       int wait,
 161                                       int *status, int *values, int flags);
 162
 163 /** Stop streaming.
 164 */
 165 static int me4600_ao_io_stream_stop(me_subdevice_t *subdevice,
 166                                     struct file *filep,
 167                                     int stop_mode, int flags);
 168
 169 /** Write datas to buffor.
 170 */
 171 static int me4600_ao_io_stream_write(me_subdevice_t *subdevice,
 172                                      struct file *filep,
 173                                      int write_mode,
 174                                      int *values, int *count, int flags);
 175
 176 /** Interrupt handler. Copy from buffer to FIFO.
 177 */
 178 static irqreturn_t me4600_ao_isr(int irq, void *dev_id);
 179 /** Copy data from circular buffer to fifo (fast) in wraparound mode.
 180 */
 181 inline int ao_write_data_wraparound(me4600_ao_subdevice_t *instance, int count,
 182                                     int start_pos);
 183
 184 /** Copy data from circular buffer to fifo (fast).
 185 */
 186 inline int ao_write_data(me4600_ao_subdevice_t *instance, int count,
 187                          int start_pos);
 188
 189 /** Copy data from circular buffer to fifo (slow).
 190 */
 191 inline int ao_write_data_pooling(me4600_ao_subdevice_t *instance, int count,
 192                                  int start_pos);
 193
 194 /** Copy data from user space to circular buffer.
 195 */
 196 inline int ao_get_data_from_user(me4600_ao_subdevice_t *instance, int count,
 197                                  int *user_values);
 198
 199 /** Stop presentation. Preserve FIFOs.
 200 */
 201 inline int ao_stop_immediately(me4600_ao_subdevice_t *instance);
 202
 203 /** Task for asynchronical state verifying.
 204 */
 205 static void me4600_ao_work_control_task(struct work_struct *work);
 206 /* Functions
 207  */
 208
 209 static int me4600_ao_io_reset_subdevice(me_subdevice_t *subdevice,
 210                                         struct file *filep, int flags)
 211 {
 212         me4600_ao_subdevice_t *instance;
 213         int err = ME_ERRNO_SUCCESS;
 214         uint32_t tmp;
 215
 216         instance = (me4600_ao_subdevice_t *) subdevice;
 217
 218         PDEBUG("executed. idx=%d\n", instance->ao_idx);
 219
 220         if (flags) {
 221                 PERROR("Invalid flag specified.\n");
 222                 return ME_ERRNO_INVALID_FLAGS;
 223         }
 224
 225         ME_SUBDEVICE_ENTER;
 226
 227         instance->status = ao_status_none;
 228         instance->ao_control_task_flag = 0;
 229         cancel_delayed_work(&instance->ao_control_task);
 230         instance->timeout.delay = 0;
 231         instance->timeout.start_time = jiffies;
 232
 233         //Stop state machine.
 234         err = ao_stop_immediately(instance);
 235
 236         //Remove from synchronous start.
 237         spin_lock(instance->preload_reg_lock);
 238         tmp = inl(instance->preload_reg);
 239         tmp &=
 240             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->
 241               ao_idx);
 242         outl(tmp, instance->preload_reg);
 243         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 244                    instance->preload_reg - instance->reg_base, tmp);
 245         *instance->preload_flags &=
 246             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->
 247               ao_idx);
 248         spin_unlock(instance->preload_reg_lock);
 249
 250         //Set single mode, dissable FIFO, dissable external trigger, set output to analog, block interrupt.
 251         outl(ME4600_AO_MODE_SINGLE | ME4600_AO_CTRL_BIT_STOP |
 252              ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_RESET_IRQ,
 253              instance->ctrl_reg);
 254         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 255                    instance->ctrl_reg - instance->reg_base,
 256                    ME4600_AO_MODE_SINGLE | ME4600_AO_CTRL_BIT_STOP |
 257                    ME4600_AO_CTRL_BIT_IMMEDIATE_STOP |
 258                    ME4600_AO_CTRL_BIT_RESET_IRQ);
 259
 260         //Set output to 0V
 261         outl(0x8000, instance->single_reg);
 262         PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 263                    instance->single_reg - instance->reg_base, 0x8000);
 264
 265         instance->circ_buf.head = 0;
 266         instance->circ_buf.tail = 0;
 267         instance->preloaded_count = 0;
 268         instance->data_count = 0;
 269         instance->single_value = 0x8000;
 270         instance->single_value_in_fifo = 0x8000;
 271
 272         //Set status to signal that device is unconfigured.
 273         instance->status = ao_status_none;
 274
 275         //Signal reset if user is on wait.
 276         wake_up_interruptible_all(&instance->wait_queue);
 277
 278         ME_SUBDEVICE_EXIT;
 279
 280         return err;
 281 }
 282
 283 static int me4600_ao_io_single_config(me_subdevice_t *subdevice,
 284                                       struct file *filep,
 285                                       int channel,
 286                                       int single_config,
 287                                       int ref,
 288                                       int trig_chan,
 289                                       int trig_type, int trig_edge, int flags)
 290 {
 291         me4600_ao_subdevice_t *instance;
 292         int err = ME_ERRNO_SUCCESS;
 293         uint32_t ctrl;
 294         uint32_t sync;
 295         unsigned long cpu_flags;
 296
 297         instance = (me4600_ao_subdevice_t *) subdevice;
 298
 299         PDEBUG("executed. idx=%d\n", instance->ao_idx);
 300
 301         // Checking parameters
 302         if (flags) {
 303                 PERROR
 304                     ("Invalid flag specified. Must be ME_IO_SINGLE_CONFIG_NO_FLAGS.\n");
 305                 return ME_ERRNO_INVALID_FLAGS;
 306         }
 307
 308         switch (trig_type) {
 309         case ME_TRIG_TYPE_SW:
 310                 if (trig_edge != ME_TRIG_EDGE_NONE) {
 311                         PERROR
 312                             ("Invalid trigger edge. Software trigger has not edge.\n");
 313                         return ME_ERRNO_INVALID_TRIG_EDGE;
 314                 }
 315                 break;
 316
 317         case ME_TRIG_TYPE_EXT_DIGITAL:
 318                 switch (trig_edge) {
 319                 case ME_TRIG_EDGE_ANY:
 320                 case ME_TRIG_EDGE_RISING:
 321                 case ME_TRIG_EDGE_FALLING:
 322                         break;
 323
 324                 default:
 325                         PERROR("Invalid trigger edge.\n");
 326                         return ME_ERRNO_INVALID_TRIG_EDGE;
 327                 }
 328                 break;
 329
 330         default:
 331                 PERROR
 332                     ("Invalid trigger type. Trigger must be software or digital.\n");
 333                 return ME_ERRNO_INVALID_TRIG_TYPE;
 334         }
 335
 336         if ((trig_chan != ME_TRIG_CHAN_DEFAULT)
 337             && (trig_chan != ME_TRIG_CHAN_SYNCHRONOUS)) {
 338                 PERROR("Invalid trigger channel specified.\n");
 339                 return ME_ERRNO_INVALID_TRIG_CHAN;
 340         }
 341
 342         if (ref != ME_REF_AO_GROUND) {
 343                 PERROR
 344                     ("Invalid reference. Analog outputs have to have got REF_AO_GROUND.\n");
 345                 return ME_ERRNO_INVALID_REF;
 346         }
 347
 348         if (single_config != 0) {
 349                 PERROR
 350                     ("Invalid single config specified. Only one range for anlog outputs is available.\n");
 351                 return ME_ERRNO_INVALID_SINGLE_CONFIG;
 352         }
 353
 354         if (channel != 0) {
 355                 PERROR
 356                     ("Invalid channel number specified. Analog output have only one channel.\n");
 357                 return ME_ERRNO_INVALID_CHANNEL;
 358         }
 359
 360         ME_SUBDEVICE_ENTER;
 361
 362         //Subdevice running in stream mode!
 363         if ((instance->status >= ao_status_stream_run_wait)
 364             && (instance->status < ao_status_stream_end)) {
 365                 PERROR("Subdevice is busy.\n");
 366                 ME_SUBDEVICE_EXIT;
 367
 368                 return ME_ERRNO_SUBDEVICE_BUSY;
 369         }
 370 /// @note For single all calls (config and write) are erasing previous state!
 371
 372         instance->status = ao_status_none;
 373
 374         // Correct single mirrors
 375         instance->single_value_in_fifo = instance->single_value;
 376
 377         //Stop device
 378         err = ao_stop_immediately(instance);
 379         if (err) {
 380                 PERROR_CRITICAL("FSM IS BUSY!\n");
 381                 ME_SUBDEVICE_EXIT;
 382
 383                 return ME_ERRNO_SUBDEVICE_BUSY;
 384         }
 385         // Set control register.
 386         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
 387         // Set stop bit. Stop streaming mode.
 388         ctrl = inl(instance->ctrl_reg);
 389         //Reset all bits.
 390         ctrl = ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_STOP;
 391
 392         if (trig_type == ME_TRIG_TYPE_EXT_DIGITAL) {
 393                 PINFO("External digital trigger.\n");
 394
 395                 if (trig_edge == ME_TRIG_EDGE_ANY) {
 396 //                              ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE | ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
 397                         instance->ctrl_trg =
 398                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
 399                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
 400                 } else if (trig_edge == ME_TRIG_EDGE_FALLING) {
 401 //                              ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
 402                         instance->ctrl_trg = ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
 403                 } else if (trig_edge == ME_TRIG_EDGE_RISING) {
 404                         instance->ctrl_trg = 0x0;
 405                 }
 406         } else if (trig_type == ME_TRIG_TYPE_SW) {
 407                 PDEBUG("Software trigger\n");
 408                 instance->ctrl_trg = 0x0;
 409         }
 410
 411         outl(ctrl, instance->ctrl_reg);
 412         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 413                    instance->ctrl_reg - instance->reg_base, ctrl);
 414         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
 415
 416         // Set preload/synchronization register.
 417         spin_lock(instance->preload_reg_lock);
 418         if (trig_type == ME_TRIG_TYPE_SW) {
 419                 *instance->preload_flags &=
 420                     ~(ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx);
 421         } else                  //if (trig_type == ME_TRIG_TYPE_EXT_DIGITAL)
 422         {
 423                 *instance->preload_flags |=
 424                     ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx;
 425         }
 426
 427         if (trig_chan == ME_TRIG_CHAN_DEFAULT) {
 428                 *instance->preload_flags &=
 429                     ~(ME4600_AO_SYNC_HOLD << instance->ao_idx);
 430         } else                  //if (trig_chan == ME_TRIG_CHAN_SYNCHRONOUS)
 431         {
 432                 *instance->preload_flags |=
 433                     ME4600_AO_SYNC_HOLD << instance->ao_idx;
 434         }
 435
 436         //Reset hardware register
 437         sync = inl(instance->preload_reg);
 438         PDEBUG_REG("preload_reg inl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 439                    instance->preload_reg - instance->reg_base, sync);
 440         sync &= ~(ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx);
 441         sync |= ME4600_AO_SYNC_HOLD << instance->ao_idx;
 442
 443         //Output configured in default (safe) mode.
 444         outl(sync, instance->preload_reg);
 445         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 446                    instance->preload_reg - instance->reg_base, sync);
 447         spin_unlock(instance->preload_reg_lock);
 448
 449         instance->status = ao_status_single_configured;
 450
 451         ME_SUBDEVICE_EXIT;
 452
 453         return err;
 454 }
 455
 456 static int me4600_ao_io_single_read(me_subdevice_t *subdevice,
 457                                     struct file *filep,
 458                                     int channel,
 459                                     int *value, int time_out, int flags)
 460 {
 461         me4600_ao_subdevice_t *instance;
 462         int err = ME_ERRNO_SUCCESS;
 463
 464         unsigned long j;
 465         unsigned long delay = 0;
 466
 467         instance = (me4600_ao_subdevice_t *) subdevice;
 468
 469         PDEBUG("executed. idx=%d\n", instance->ao_idx);
 470
 471         if (flags & ~ME_IO_SINGLE_NONBLOCKING) {
 472                 PERROR("Invalid flag specified. %d\n", flags);
 473                 return ME_ERRNO_INVALID_FLAGS;
 474         }
 475
 476         if (time_out < 0) {
 477                 PERROR("Invalid timeout specified.\n");
 478                 return ME_ERRNO_INVALID_TIMEOUT;
 479         }
 480
 481         if (channel != 0) {
 482                 PERROR("Invalid channel number specified.\n");
 483                 return ME_ERRNO_INVALID_CHANNEL;
 484         }
 485
 486         if ((instance->status >= ao_status_stream_configured)
 487             && (instance->status <= ao_status_stream_end)) {
 488                 PERROR("Subdevice not configured to work in single mode!\n");
 489                 return ME_ERRNO_PREVIOUS_CONFIG;
 490         }
 491
 492         ME_SUBDEVICE_ENTER;
 493         if ((!flags) && (instance->status == ao_status_single_run_wait)) {      //Blocking mode. Wait for trigger.
 494                 if (time_out) {
 495                         delay = (time_out * HZ) / 1000;
 496                         if (delay == 0)
 497                                 delay = 1;
 498                 }
 499
 500                 j = jiffies;
 501
 502                 //Only runing process will interrupt this call. Events are signaled when status change. This procedure has own timeout.
 503                 wait_event_interruptible_timeout(instance->wait_queue,
 504                                                  (instance->status !=
 505                                                   ao_status_single_run_wait),
 506                                                  (delay) ? delay +
 507                                                  1 : LONG_MAX);
 508
 509                 if (instance->status == ao_status_none) {
 510                         PDEBUG("Single canceled.\n");
 511                         err = ME_ERRNO_CANCELLED;
 512                 }
 513
 514                 if (signal_pending(current)) {
 515                         PERROR("Wait on start of state machine interrupted.\n");
 516                         instance->status = ao_status_none;
 517                         ao_stop_immediately(instance);
 518                         err = ME_ERRNO_SIGNAL;
 519                 }
 520
 521                 if ((delay) && ((jiffies - j) >= delay)) {
 522
 523                         PDEBUG("Timeout reached.\n");
 524                         err = ME_ERRNO_TIMEOUT;
 525                 }
 526
 527                 *value =
 528                     (!err) ? instance->single_value_in_fifo : instance->
 529                     single_value;
 530         } else {                //Non-blocking mode
 531                 //Read value
 532                 *value = instance->single_value;
 533         }
 534
 535         ME_SUBDEVICE_EXIT;
 536
 537         return err;
 538 }
 539
 540 static int me4600_ao_io_single_write(me_subdevice_t *subdevice,
 541                                      struct file *filep,
 542                                      int channel,
 543                                      int value, int time_out, int flags)
 544 {
 545         me4600_ao_subdevice_t *instance;
 546         int err = ME_ERRNO_SUCCESS;
 547         unsigned long cpu_flags;
 548         unsigned long j;
 549         unsigned long delay = 0x0;
 550
 551         //Registry handling variables.
 552         uint32_t sync_mask;
 553         uint32_t mode;
 554         uint32_t tmp;
 555         uint32_t ctrl;
 556         uint32_t status;
 557
 558         instance = (me4600_ao_subdevice_t *) subdevice;
 559
 560         PDEBUG("executed. idx=%d\n", instance->ao_idx);
 561
 562         if (flags &
 563             ~(ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS |
 564               ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) {
 565                 PERROR("Invalid flag specified.\n");
 566                 return ME_ERRNO_INVALID_FLAGS;
 567         }
 568
 569         if (time_out < 0) {
 570                 PERROR("Invalid timeout specified.\n");
 571                 return ME_ERRNO_INVALID_TIMEOUT;
 572         }
 573
 574         if (value & ~ME4600_AO_MAX_DATA) {
 575                 PERROR("Invalid value provided.\n");
 576                 return ME_ERRNO_VALUE_OUT_OF_RANGE;
 577         }
 578
 579         if (channel != 0) {
 580                 PERROR("Invalid channel number specified.\n");
 581                 return ME_ERRNO_INVALID_CHANNEL;
 582         }
 583
 584         if ((instance->status == ao_status_none)
 585             || (instance->status > ao_status_single_end)) {
 586                 PERROR("Subdevice not configured to work in single mode!\n");
 587                 return ME_ERRNO_PREVIOUS_CONFIG;
 588         }
 589
 590         ME_SUBDEVICE_ENTER;
 591
 592 /// @note For single all calls (config and write) are erasing previous state!
 593
 594         //Cancel control task
 595         PDEBUG("Cancel control task. idx=%d\n", instance->ao_idx);
 596         instance->ao_control_task_flag = 0;
 597         cancel_delayed_work(&instance->ao_control_task);
 598
 599         // Correct single mirrors
 600         instance->single_value_in_fifo = instance->single_value;
 601
 602         //Stop device
 603         err = ao_stop_immediately(instance);
 604         if (err) {
 605                 PERROR_CRITICAL("FSM IS BUSY!\n");
 606                 ME_SUBDEVICE_EXIT;
 607
 608                 return ME_ERRNO_SUBDEVICE_BUSY;
 609         }
 610
 611         if (time_out) {
 612                 delay = (time_out * HZ) / 1000;
 613
 614                 if (delay == 0)
 615                         delay = 1;
 616         }
 617
 618         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
 619
 620         instance->single_value_in_fifo = value;
 621
 622         ctrl = inl(instance->ctrl_reg);
 623
 624         if (!instance->fifo) {  //No FIFO
 625                 //Set the single mode.
 626                 ctrl &= ~ME4600_AO_CTRL_MODE_MASK;
 627
 628                 //Write value
 629                 PDEBUG("Write value\n");
 630                 outl(value, instance->single_reg);
 631                 PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
 632                            instance->reg_base,
 633                            instance->single_reg - instance->reg_base, value);
 634         } else {                // mix-mode
 635                 //Set speed
 636                 outl(ME4600_AO_MIN_CHAN_TICKS - 1, instance->timer_reg);
 637                 PDEBUG_REG("timer_reg outl(0x%lX+0x%lX)=0x%x\n",
 638                            instance->reg_base,
 639                            instance->timer_reg - instance->reg_base,
 640                            (int)ME4600_AO_MIN_CHAN_TICKS);
 641                 instance->hardware_stop_delay = HZ / 10;        //100ms
 642
 643                 status = inl(instance->status_reg);
 644
 645                 //Set the continous mode.
 646                 ctrl &= ~ME4600_AO_CTRL_MODE_MASK;
 647                 ctrl |= ME4600_AO_MODE_CONTINUOUS;
 648
 649                 //Prepare FIFO
 650                 if (!(ctrl & ME4600_AO_CTRL_BIT_ENABLE_FIFO)) { //FIFO wasn't enabeled. Do it.
 651                         PINFO("Enableing FIFO.\n");
 652                         ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
 653                         ctrl |=
 654                             ME4600_AO_CTRL_BIT_ENABLE_FIFO |
 655                             ME4600_AO_CTRL_BIT_RESET_IRQ;
 656                 } else {        //Check if FIFO is empty
 657                         if (status & ME4600_AO_STATUS_BIT_EF) { //FIFO not empty
 658                                 PINFO("Reseting FIFO.\n");
 659                                 ctrl &=
 660                                     ~(ME4600_AO_CTRL_BIT_ENABLE_FIFO |
 661                                       ME4600_AO_CTRL_BIT_ENABLE_IRQ);
 662                                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
 663                                 outl(ctrl, instance->ctrl_reg);
 664                                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
 665                                            instance->reg_base,
 666                                            instance->ctrl_reg -
 667                                            instance->reg_base, ctrl);
 668
 669                                 ctrl |=
 670                                     ME4600_AO_CTRL_BIT_ENABLE_FIFO |
 671                                     ME4600_AO_CTRL_BIT_RESET_IRQ;
 672                         } else {        //FIFO empty, only interrupt needs to be disabled!
 673                                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
 674                                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
 675                         }
 676                 }
 677
 678                 outl(ctrl, instance->ctrl_reg);
 679                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
 680                            instance->reg_base,
 681                            instance->ctrl_reg - instance->reg_base, ctrl);
 682
 683                 //Write output - 1 value to FIFO
 684                 if (instance->ao_idx & 0x1) {
 685                         outl(value <<= 16, instance->fifo_reg);
 686                         PDEBUG_REG("fifo_reg outl(0x%lX+0x%lX)=0x%x\n",
 687                                    instance->reg_base,
 688                                    instance->fifo_reg - instance->reg_base,
 689                                    value <<= 16);
 690                 } else {
 691                         outl(value, instance->fifo_reg);
 692                         PDEBUG_REG("fifo_reg outl(0x%lX+0x%lX)=0x%x\n",
 693                                    instance->reg_base,
 694                                    instance->fifo_reg - instance->reg_base,
 695                                    value);
 696                 }
 697         }
 698
 699         mode = *instance->preload_flags >> instance->ao_idx;
 700         mode &= (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG);
 701
 702         PINFO("Triggering mode: 0x%x\n", mode);
 703
 704         spin_lock(instance->preload_reg_lock);
 705         sync_mask = inl(instance->preload_reg);
 706         PDEBUG_REG("preload_reg inl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 707                    instance->preload_reg - instance->reg_base, sync_mask);
 708         switch (mode) {
 709         case 0:         //Individual software
 710                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
 711
 712                 if (!instance->fifo) {  // No FIFO - In this case resetting 'ME4600_AO_SYNC_HOLD' will trigger output.
 713                         if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != ME4600_AO_SYNC_HOLD) {       //Now we can set correct mode. This is exception. It is set to synchronous and triggered later.
 714                                 sync_mask &=
 715                                     ~(ME4600_AO_SYNC_EXT_TRIG << instance->
 716                                       ao_idx);
 717                                 sync_mask |=
 718                                     ME4600_AO_SYNC_HOLD << instance->ao_idx;
 719
 720                                 outl(sync_mask, instance->preload_reg);
 721                                 PDEBUG_REG
 722                                     ("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 723                                      instance->reg_base,
 724                                      instance->preload_reg - instance->reg_base,
 725                                      sync_mask);
 726                         }
 727                 } else {        // FIFO
 728                         if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != 0x0) {       //Now we can set correct mode.
 729                                 sync_mask &=
 730                                     ~((ME4600_AO_SYNC_EXT_TRIG |
 731                                        ME4600_AO_SYNC_HOLD) << instance->
 732                                       ao_idx);
 733
 734                                 outl(sync_mask, instance->preload_reg);
 735                                 PDEBUG_REG
 736                                     ("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 737                                      instance->reg_base,
 738                                      instance->preload_reg - instance->reg_base,
 739                                      sync_mask);
 740                         }
 741                 }
 742                 instance->single_value = value;
 743                 break;
 744
 745         case ME4600_AO_SYNC_EXT_TRIG:   //Individual hardware
 746                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
 747
 748                 if (!instance->fifo) {  // No FIFO - In this case resetting 'ME4600_AO_SYNC_HOLD' will trigger output.
 749                         if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != ME4600_AO_SYNC_HOLD) {       //Now we can set correct mode
 750                                 sync_mask &=
 751                                     ~(ME4600_AO_SYNC_EXT_TRIG << instance->
 752                                       ao_idx);
 753                                 sync_mask |=
 754                                     ME4600_AO_SYNC_HOLD << instance->ao_idx;
 755
 756                                 outl(sync_mask, instance->preload_reg);
 757                                 PDEBUG_REG
 758                                     ("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 759                                      instance->reg_base,
 760                                      instance->preload_reg - instance->reg_base,
 761                                      sync_mask);
 762                         }
 763                 } else {        // FIFO
 764                         if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != 0x0) {       //Now we can set correct mode.
 765                                 sync_mask &=
 766                                     ~((ME4600_AO_SYNC_EXT_TRIG |
 767                                        ME4600_AO_SYNC_HOLD) << instance->
 768                                       ao_idx);
 769
 770                                 outl(sync_mask, instance->preload_reg);
 771                                 PDEBUG_REG
 772                                     ("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 773                                      instance->reg_base,
 774                                      instance->preload_reg - instance->reg_base,
 775                                      sync_mask);
 776                         }
 777                 }
 778                 break;
 779
 780         case ME4600_AO_SYNC_HOLD:       //Synchronous software
 781                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
 782
 783 //                                      if((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != ME4600_AO_SYNC_HOLD)
 784                 if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG)) {   //Now we can set correct mode
 785                         sync_mask |=
 786                             ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx;
 787 //                                              sync_mask &= ~(ME4600_AO_SYNC_EXT_TRIG << instance->ao_idx);
 788                         sync_mask |= ME4600_AO_SYNC_HOLD << instance->ao_idx;
 789
 790                         outl(sync_mask, instance->preload_reg);
 791                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 792                                    instance->reg_base,
 793                                    instance->preload_reg - instance->reg_base,
 794                                    sync_mask);
 795                 }
 796                 break;
 797
 798         case (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG):   //Synchronous hardware
 799                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
 800                 if ((sync_mask & ((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->ao_idx)) != (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG)) {   //Now we can set correct mode
 801                         sync_mask |=
 802                             (ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) <<
 803                             instance->ao_idx;
 804
 805                         outl(sync_mask, instance->preload_reg);
 806                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 807                                    instance->reg_base,
 808                                    instance->preload_reg - instance->reg_base,
 809                                    sync_mask);
 810                 }
 811                 break;
 812         }
 813 //              spin_unlock(instance->preload_reg_lock);        // Moved down.
 814
 815         //Activate ISM (remove 'stop' bits)
 816         ctrl &=
 817             ~(ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
 818               ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH);
 819         ctrl |= instance->ctrl_trg;
 820         ctrl &= ~(ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
 821         outl(ctrl, instance->ctrl_reg);
 822         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
 823                    instance->ctrl_reg - instance->reg_base, ctrl);
 824         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
 825
 826 /// @note When flag 'ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS' is set than output is triggered. ALWAYS!
 827
 828         if (!instance->fifo) {  //No FIFO
 829                 if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {       //Fired all software synchronous outputs.
 830                         tmp = ~(*instance->preload_flags | 0xFFFF0000);
 831                         PINFO
 832                             ("Fired all software synchronous outputs. mask:0x%08x\n",
 833                              tmp);
 834                         tmp |= sync_mask & 0xFFFF0000;
 835                         // Add this channel to list
 836                         tmp &= ~(ME4600_AO_SYNC_HOLD << instance->ao_idx);
 837
 838                         //Fire
 839                         PINFO("Software trigger.\n");
 840                         outl(tmp, instance->preload_reg);
 841                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 842                                    instance->reg_base,
 843                                    instance->preload_reg - instance->reg_base,
 844                                    tmp);
 845
 846                         //Restore save settings
 847                         outl(sync_mask, instance->preload_reg);
 848                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 849                                    instance->reg_base,
 850                                    instance->preload_reg - instance->reg_base,
 851                                    sync_mask);
 852                 } else if (!mode) {     // Add this channel to list
 853                         outl(sync_mask &
 854                              ~(ME4600_AO_SYNC_HOLD << instance->ao_idx),
 855                              instance->preload_reg);
 856                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 857                                    instance->reg_base,
 858                                    instance->preload_reg - instance->reg_base,
 859                                    sync_mask & ~(ME4600_AO_SYNC_HOLD <<
 860                                                  instance->ao_idx));
 861
 862                         //Fire
 863                         PINFO("Software trigger.\n");
 864
 865                         //Restore save settings
 866                         outl(sync_mask, instance->preload_reg);
 867                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 868                                    instance->reg_base,
 869                                    instance->preload_reg - instance->reg_base,
 870                                    sync_mask);
 871                 }
 872
 873         } else {                // mix-mode - begin
 874                 if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {       //Trigger outputs
 875                         //Add channel to start list
 876                         outl(sync_mask |
 877                              (ME4600_AO_SYNC_HOLD << instance->ao_idx),
 878                              instance->preload_reg);
 879                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 880                                    instance->reg_base,
 881                                    instance->preload_reg - instance->reg_base,
 882                                    sync_mask | (ME4600_AO_SYNC_HOLD <<
 883                                                 instance->ao_idx));
 884
 885                         //Fire
 886                         PINFO
 887                             ("Fired all software synchronous outputs by software trigger.\n");
 888                         outl(0x8000, instance->single_reg);
 889                         PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
 890                                    instance->reg_base,
 891                                    instance->single_reg - instance->reg_base,
 892                                    0x8000);
 893
 894                         //Restore save settings
 895                         outl(sync_mask, instance->preload_reg);
 896                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
 897                                    instance->reg_base,
 898                                    instance->preload_reg - instance->reg_base,
 899                                    sync_mask);
 900                 } else if (!mode) {     //Trigger outputs
 901 /*                      //Remove channel from start list //<== Unnecessary. Removed.
 902                         outl(sync_mask & ~(ME4600_AO_SYNC_HOLD << instance->ao_idx), instance->preload_reg);
 903                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, tmp);
 904 */
 905                         //Fire
 906                         PINFO("Software trigger.\n");
 907                         outl(0x8000, instance->single_reg);
 908                         PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
 909                                    instance->reg_base,
 910                                    instance->single_reg - instance->reg_base,
 911                                    0x8000);
 912
 913 /*                      //Restore save settings //<== Unnecessary. Removed.
 914                         outl(sync_mask, instance->preload_reg);
 915                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, sync_mask);
 916 */
 917                 }
 918         }
 919         spin_unlock(instance->preload_reg_lock);
 920
 921         j = jiffies;
 922         instance->status = ao_status_single_run_wait;
 923
 924         instance->timeout.delay = delay;
 925         instance->timeout.start_time = j;
 926         instance->ao_control_task_flag = 1;
 927         queue_delayed_work(instance->me4600_workqueue,
 928                            &instance->ao_control_task, 1);
 929
 930         if (!(flags & ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) {
 931
 932                 //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason.
 933                 wait_event_interruptible_timeout(instance->wait_queue,
 934                                                  (instance->status !=
 935                                                   ao_status_single_run_wait),
 936                                                  (delay) ? delay +
 937                                                  1 : LONG_MAX);
 938
 939                 if (((!delay) || ((jiffies - j) <= delay))
 940                     && (instance->status != ao_status_single_end)) {
 941                         PDEBUG("Single canceled.\n");
 942                         err = ME_ERRNO_CANCELLED;
 943                 }
 944
 945                 if (signal_pending(current)) {
 946                         PERROR("Wait on start of state machine interrupted.\n");
 947                         instance->ao_control_task_flag = 0;
 948                         cancel_delayed_work(&instance->ao_control_task);
 949                         ao_stop_immediately(instance);
 950                         instance->status = ao_status_none;
 951                         err = ME_ERRNO_SIGNAL;
 952                 }
 953
 954                 if ((delay) && ((jiffies - j) >= delay)) {
 955                         if (instance->status == ao_status_single_end) {
 956                                 PDEBUG("Timeout reached.\n");
 957                         } else {
 958                                 if ((jiffies - j) > delay) {
 959                                         PERROR
 960                                             ("Timeout reached. Not handled by control task!\n");
 961                                 } else {
 962                                         PERROR
 963                                             ("Timeout reached. Signal come but status is strange: %d\n",
 964                                              instance->status);
 965                                 }
 966
 967                                 ao_stop_immediately(instance);
 968                         }
 969
 970                         instance->ao_control_task_flag = 0;
 971                         cancel_delayed_work(&instance->ao_control_task);
 972                         instance->status = ao_status_single_end;
 973                         err = ME_ERRNO_TIMEOUT;
 974                 }
 975         }
 976
 977         ME_SUBDEVICE_EXIT;
 978
 979         return err;
 980 }
 981
 982 static int me4600_ao_io_stream_config(me_subdevice_t *subdevice,
 983                                       struct file *filep,
 984                                       meIOStreamConfig_t *config_list,
 985                                       int count,
 986                                       meIOStreamTrigger_t *trigger,
 987                                       int fifo_irq_threshold, int flags)
 988 {
 989         me4600_ao_subdevice_t *instance;
 990         int err = ME_ERRNO_SUCCESS;
 991         uint32_t ctrl;
 992         unsigned long cpu_flags;
 993         uint64_t conv_ticks;
 994         unsigned int conv_start_ticks_low = trigger->iConvStartTicksLow;
 995         unsigned int conv_start_ticks_high = trigger->iConvStartTicksHigh;
 996
 997         instance = (me4600_ao_subdevice_t *) subdevice;
 998
 999         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1000
1001         if (!instance->fifo) {
1002                 PERROR("Not a streaming ao.\n");
1003                 return ME_ERRNO_NOT_SUPPORTED;
1004         }
1005
1006         conv_ticks =
1007             (uint64_t) conv_start_ticks_low +
1008             ((uint64_t) conv_start_ticks_high << 32);
1009
1010         if (flags &
1011             ~(ME_IO_STREAM_CONFIG_HARDWARE_ONLY | ME_IO_STREAM_CONFIG_WRAPAROUND
1012               | ME_IO_STREAM_CONFIG_BIT_PATTERN)) {
1013                 PERROR("Invalid flags.\n");
1014                 return ME_ERRNO_INVALID_FLAGS;
1015         }
1016
1017         if (flags & ME_IO_STREAM_CONFIG_HARDWARE_ONLY) {
1018                 if (!(flags & ME_IO_STREAM_CONFIG_WRAPAROUND)) {
1019                         PERROR
1020                             ("Hardware ME_IO_STREAM_CONFIG_HARDWARE_ONLY has to be with ME_IO_STREAM_CONFIG_WRAPAROUND.\n");
1021                         return ME_ERRNO_INVALID_FLAGS;
1022                 }
1023
1024                 if ((trigger->iAcqStopTrigType != ME_TRIG_TYPE_NONE)
1025                     || (trigger->iScanStopTrigType != ME_TRIG_TYPE_NONE)) {
1026                         PERROR
1027                             ("Hardware wraparound mode must be in infinite mode.\n");
1028                         return ME_ERRNO_INVALID_FLAGS;
1029                 }
1030         }
1031
1032         if (count != 1) {
1033                 PERROR("Only 1 entry in config list acceptable.\n");
1034                 return ME_ERRNO_INVALID_CONFIG_LIST_COUNT;
1035         }
1036
1037         if (config_list[0].iChannel != 0) {
1038                 PERROR("Invalid channel number specified.\n");
1039                 return ME_ERRNO_INVALID_CHANNEL;
1040         }
1041
1042         if (config_list[0].iStreamConfig != 0) {
1043                 PERROR("Only one range available.\n");
1044                 return ME_ERRNO_INVALID_STREAM_CONFIG;
1045         }
1046
1047         if (config_list[0].iRef != ME_REF_AO_GROUND) {
1048                 PERROR("Output is referenced to ground.\n");
1049                 return ME_ERRNO_INVALID_REF;
1050         }
1051
1052         if ((trigger->iAcqStartTicksLow != 0)
1053             || (trigger->iAcqStartTicksHigh != 0)) {
1054                 PERROR
1055                     ("Invalid acquisition start trigger argument specified.\n");
1056                 return ME_ERRNO_INVALID_ACQ_START_ARG;
1057         }
1058
1059         if (config_list[0].iFlags) {
1060                 PERROR("Invalid config list flag.\n");
1061                 return ME_ERRNO_INVALID_FLAGS;
1062         }
1063
1064         switch (trigger->iAcqStartTrigType) {
1065         case ME_TRIG_TYPE_SW:
1066                 if (trigger->iAcqStartTrigEdge != ME_TRIG_EDGE_NONE) {
1067                         PERROR
1068                             ("Invalid acquisition start trigger edge specified.\n");
1069                         return ME_ERRNO_INVALID_ACQ_START_TRIG_EDGE;
1070                 }
1071                 break;
1072
1073         case ME_TRIG_TYPE_EXT_DIGITAL:
1074                 switch (trigger->iAcqStartTrigEdge) {
1075                 case ME_TRIG_EDGE_ANY:
1076                 case ME_TRIG_EDGE_RISING:
1077                 case ME_TRIG_EDGE_FALLING:
1078                         break;
1079
1080                 default:
1081                         PERROR
1082                             ("Invalid acquisition start trigger edge specified.\n");
1083                         return ME_ERRNO_INVALID_ACQ_START_TRIG_EDGE;
1084                 }
1085                 break;
1086
1087         default:
1088                 PERROR("Invalid acquisition start trigger type specified.\n");
1089                 return ME_ERRNO_INVALID_ACQ_START_TRIG_TYPE;
1090         }
1091
1092         if (trigger->iScanStartTrigType != ME_TRIG_TYPE_FOLLOW) {
1093                 PERROR("Invalid scan start trigger type specified.\n");
1094                 return ME_ERRNO_INVALID_SCAN_START_TRIG_TYPE;
1095         }
1096
1097         if (trigger->iConvStartTrigType != ME_TRIG_TYPE_TIMER) {
1098                 PERROR("Invalid conv start trigger type specified.\n");
1099                 return ME_ERRNO_INVALID_CONV_START_TRIG_TYPE;
1100         }
1101
1102         if ((conv_ticks < ME4600_AO_MIN_CHAN_TICKS)
1103             || (conv_ticks > ME4600_AO_MAX_CHAN_TICKS)) {
1104                 PERROR("Invalid conv start trigger argument specified.\n");
1105                 return ME_ERRNO_INVALID_CONV_START_ARG;
1106         }
1107
1108         if (trigger->iAcqStartTicksLow || trigger->iAcqStartTicksHigh) {
1109                 PERROR("Invalid acq start trigger argument specified.\n");
1110                 return ME_ERRNO_INVALID_ACQ_START_ARG;
1111         }
1112
1113         if (trigger->iScanStartTicksLow || trigger->iScanStartTicksHigh) {
1114                 PERROR("Invalid scan start trigger argument specified.\n");
1115                 return ME_ERRNO_INVALID_SCAN_START_ARG;
1116         }
1117
1118         switch (trigger->iScanStopTrigType) {
1119         case ME_TRIG_TYPE_NONE:
1120                 if (trigger->iScanStopCount != 0) {
1121                         PERROR("Invalid scan stop count specified.\n");
1122                         return ME_ERRNO_INVALID_SCAN_STOP_ARG;
1123                 }
1124                 break;
1125
1126         case ME_TRIG_TYPE_COUNT:
1127                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
1128                         if (trigger->iScanStopCount <= 0) {
1129                                 PERROR("Invalid scan stop count specified.\n");
1130                                 return ME_ERRNO_INVALID_SCAN_STOP_ARG;
1131                         }
1132                 } else {
1133                         PERROR("The continous mode has not 'scan' contects.\n");
1134                         return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
1135                 }
1136                 break;
1137
1138         default:
1139                 PERROR("Invalid scan stop trigger type specified.\n");
1140                 return ME_ERRNO_INVALID_SCAN_STOP_TRIG_TYPE;
1141         }
1142
1143         switch (trigger->iAcqStopTrigType) {
1144         case ME_TRIG_TYPE_NONE:
1145                 if (trigger->iAcqStopCount != 0) {
1146                         PERROR("Invalid acq stop count specified.\n");
1147                         return ME_ERRNO_INVALID_ACQ_STOP_ARG;
1148                 }
1149                 break;
1150
1151         case ME_TRIG_TYPE_COUNT:
1152                 if (trigger->iScanStopTrigType != ME_TRIG_TYPE_NONE) {
1153                         PERROR("Invalid acq stop trigger type specified.\n");
1154                         return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
1155                 }
1156
1157                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
1158                         if (trigger->iAcqStopCount <= 0) {
1159                                 PERROR
1160                                     ("The continous mode has not 'scan' contects.\n");
1161                                 return ME_ERRNO_INVALID_ACQ_STOP_ARG;
1162                         }
1163                 }
1164                 break;
1165
1166         default:
1167                 PERROR("Invalid acq stop trigger type specified.\n");
1168                 return ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
1169         }
1170
1171         switch (trigger->iAcqStartTrigChan) {
1172         case ME_TRIG_CHAN_DEFAULT:
1173         case ME_TRIG_CHAN_SYNCHRONOUS:
1174                 break;
1175
1176         default:
1177                 PERROR("Invalid acq start trigger channel specified.\n");
1178                 return ME_ERRNO_INVALID_ACQ_START_TRIG_CHAN;
1179         }
1180
1181         ME_SUBDEVICE_ENTER;
1182
1183         if ((flags & ME_IO_STREAM_CONFIG_BIT_PATTERN) && !instance->bitpattern) {
1184                 PERROR("This subdevice not support output redirection.\n");
1185                 ME_SUBDEVICE_EXIT;
1186                 return ME_ERRNO_INVALID_FLAGS;
1187         }
1188         //Stop device
1189
1190         //Cancel control task
1191         PDEBUG("Cancel control task. idx=%d\n", instance->ao_idx);
1192         instance->ao_control_task_flag = 0;
1193         cancel_delayed_work(&instance->ao_control_task);
1194
1195         //Check if state machine is stopped.
1196         err = ao_stop_immediately(instance);
1197         if (err) {
1198                 PERROR_CRITICAL("FSM IS BUSY!\n");
1199                 ME_SUBDEVICE_EXIT;
1200
1201                 return ME_ERRNO_SUBDEVICE_BUSY;
1202         }
1203
1204         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
1205         //Reset control register. Block all actions. Disable IRQ. Disable FIFO.
1206         ctrl =
1207             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_STOP |
1208             ME4600_AO_CTRL_BIT_RESET_IRQ;
1209         outl(ctrl, instance->ctrl_reg);
1210         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1211                    instance->ctrl_reg - instance->reg_base, ctrl);
1212
1213         //This is paranoic, but to be sure.
1214         instance->preloaded_count = 0;
1215         instance->data_count = 0;
1216         instance->circ_buf.head = 0;
1217         instance->circ_buf.tail = 0;
1218
1219         /* Set mode. */
1220         if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {   //Wraparound
1221                 if (flags & ME_IO_STREAM_CONFIG_HARDWARE_ONLY) {        //Hardware wraparound
1222                         PINFO("Hardware wraparound.\n");
1223                         ctrl |= ME4600_AO_MODE_WRAPAROUND;
1224                         instance->mode = ME4600_AO_HW_WRAP_MODE;
1225                 } else {        //Software wraparound
1226                         PINFO("Software wraparound.\n");
1227                         ctrl |= ME4600_AO_MODE_CONTINUOUS;
1228                         instance->mode = ME4600_AO_SW_WRAP_MODE;
1229                 }
1230         } else {                //Continous
1231                 PINFO("Continous.\n");
1232                 ctrl |= ME4600_AO_MODE_CONTINUOUS;
1233                 instance->mode = ME4600_AO_CONTINOUS;
1234         }
1235
1236         //Set the trigger edge.
1237         if (trigger->iAcqStartTrigType == ME_TRIG_TYPE_EXT_DIGITAL) {   //Set the trigger type and edge for external trigger.
1238                 PINFO("External digital trigger.\n");
1239                 instance->start_mode = ME4600_AO_EXT_TRIG;
1240 /*
1241                         ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
1242 */
1243                 switch (trigger->iAcqStartTrigEdge) {
1244                 case ME_TRIG_EDGE_RISING:
1245                         PINFO("Set the trigger edge: rising.\n");
1246                         instance->ctrl_trg = 0x0;
1247                         break;
1248
1249                 case ME_TRIG_EDGE_FALLING:
1250                         PINFO("Set the trigger edge: falling.\n");
1251 //                                      ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
1252                         instance->ctrl_trg = ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
1253                         break;
1254
1255                 case ME_TRIG_EDGE_ANY:
1256                         PINFO("Set the trigger edge: both edges.\n");
1257 //                                      ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE | ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
1258                         instance->ctrl_trg =
1259                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
1260                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
1261                         break;
1262                 }
1263         } else {
1264                 PINFO("Internal software trigger.\n");
1265                 instance->start_mode = 0;
1266         }
1267
1268         //Set the stop mode and value.
1269         if (trigger->iAcqStopTrigType == ME_TRIG_TYPE_COUNT) {  //Amount of data
1270                 instance->stop_mode = ME4600_AO_ACQ_STOP_MODE;
1271                 instance->stop_count = trigger->iAcqStopCount;
1272         } else if (trigger->iScanStopTrigType == ME_TRIG_TYPE_COUNT) {  //Amount of 'scans'
1273                 instance->stop_mode = ME4600_AO_SCAN_STOP_MODE;
1274                 instance->stop_count = trigger->iScanStopCount;
1275         } else {                //Infinite
1276                 instance->stop_mode = ME4600_AO_INF_STOP_MODE;
1277                 instance->stop_count = 0;
1278         }
1279
1280         PINFO("Stop count: %d.\n", instance->stop_count);
1281
1282         if (trigger->iAcqStartTrigChan == ME_TRIG_CHAN_SYNCHRONOUS) {   //Synchronous start
1283                 instance->start_mode |= ME4600_AO_SYNC_HOLD;
1284                 if (trigger->iAcqStartTrigType == ME_TRIG_TYPE_EXT_DIGITAL) {   //Externaly triggered
1285                         PINFO("Synchronous start. Externaly trigger active.\n");
1286                         instance->start_mode |= ME4600_AO_SYNC_EXT_TRIG;
1287                 }
1288 #ifdef MEDEBUG_INFO
1289                 else {
1290                         PINFO
1291                             ("Synchronous start. Externaly trigger dissabled.\n");
1292                 }
1293 #endif
1294
1295         }
1296         //Set speed
1297         outl(conv_ticks - 2, instance->timer_reg);
1298         PDEBUG_REG("timer_reg outl(0x%lX+0x%lX)=0x%llx\n", instance->reg_base,
1299                    instance->timer_reg - instance->reg_base, conv_ticks - 2);
1300         instance->hardware_stop_delay = (int)(conv_ticks * HZ) / ME4600_AO_BASE_FREQUENCY;      //<== MUST be with cast!
1301
1302         //Conect outputs to analog or digital port.
1303         if (flags & ME_IO_STREAM_CONFIG_BIT_PATTERN) {
1304                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_DO;
1305         }
1306         // Write the control word
1307         outl(ctrl, instance->ctrl_reg);
1308         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1309                    instance->ctrl_reg - instance->reg_base, ctrl);
1310
1311         //Set status.
1312         instance->status = ao_status_stream_configured;
1313         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
1314
1315         ME_SUBDEVICE_EXIT;
1316
1317         return err;
1318 }
1319
1320 static int me4600_ao_io_stream_new_values(me_subdevice_t *subdevice,
1321                                           struct file *filep,
1322                                           int time_out, int *count, int flags)
1323 {
1324         me4600_ao_subdevice_t *instance;
1325         int err = ME_ERRNO_SUCCESS;
1326         long t = 0;
1327         long j;
1328
1329         instance = (me4600_ao_subdevice_t *) subdevice;
1330
1331         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1332
1333         if (!instance->fifo) {
1334                 PERROR("Not a streaming ao.\n");
1335                 return ME_ERRNO_NOT_SUPPORTED;
1336         }
1337
1338         if (flags) {
1339                 PERROR("Invalid flag specified.\n");
1340                 return ME_ERRNO_INVALID_FLAGS;
1341         }
1342
1343         if (!instance->circ_buf.buf) {
1344                 PERROR("Circular buffer not exists.\n");
1345                 return ME_ERRNO_INTERNAL;
1346         }
1347
1348         if (time_out < 0) {
1349                 PERROR("Invalid time_out specified.\n");
1350                 return ME_ERRNO_INVALID_TIMEOUT;
1351         }
1352
1353         ME_SUBDEVICE_ENTER;
1354
1355         if (me_circ_buf_space(&instance->circ_buf)) {   //The buffer is NOT full.
1356                 *count = me_circ_buf_space(&instance->circ_buf);
1357         } else {                //The buffer is full.
1358                 if (time_out) {
1359                         t = (time_out * HZ) / 1000;
1360
1361                         if (t == 0)
1362                                 t = 1;
1363                 } else {        //Max time.
1364                         t = LONG_MAX;
1365                 }
1366
1367                 *count = 0;
1368
1369                 j = jiffies;
1370
1371                 //Only runing process will interrupt this call. Interrupts are when FIFO HF is signaled.
1372                 wait_event_interruptible_timeout(instance->wait_queue,
1373                                                  ((me_circ_buf_space
1374                                                    (&instance->circ_buf))
1375                                                   || !(inl(instance->status_reg)
1376                                                        &
1377                                                        ME4600_AO_STATUS_BIT_FSM)),
1378                                                  t);
1379
1380                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
1381                         PERROR("AO subdevice is not running.\n");
1382                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
1383                 } else if (signal_pending(current)) {
1384                         PERROR("Wait on values interrupted from signal.\n");
1385                         instance->status = ao_status_none;
1386                         ao_stop_immediately(instance);
1387                         err = ME_ERRNO_SIGNAL;
1388                 } else if ((jiffies - j) >= t) {
1389                         PERROR("Wait on values timed out.\n");
1390                         err = ME_ERRNO_TIMEOUT;
1391                 } else {        //Uff... all is good. Inform user about empty space.
1392                         *count = me_circ_buf_space(&instance->circ_buf);
1393                 }
1394         }
1395
1396         ME_SUBDEVICE_EXIT;
1397
1398         return err;
1399 }
1400
1401 static int me4600_ao_io_stream_start(me_subdevice_t *subdevice,
1402                                      struct file *filep,
1403                                      int start_mode, int time_out, int flags)
1404 {
1405         me4600_ao_subdevice_t *instance;
1406         int err = ME_ERRNO_SUCCESS;
1407         unsigned long cpu_flags = 0;
1408         uint32_t status;
1409         uint32_t ctrl;
1410         uint32_t synch;
1411         int count = 0;
1412         int circ_buffer_count;
1413
1414         unsigned long ref;
1415         unsigned long delay = 0;
1416
1417         instance = (me4600_ao_subdevice_t *) subdevice;
1418
1419         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1420
1421         if (!instance->fifo) {
1422                 PERROR("Not a streaming ao.\n");
1423                 return ME_ERRNO_NOT_SUPPORTED;
1424         }
1425
1426         if (flags & ~ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
1427                 PERROR("Invalid flags.\n");
1428                 return ME_ERRNO_INVALID_FLAGS;
1429         }
1430
1431         if (time_out < 0) {
1432                 PERROR("Invalid timeout specified.\n");
1433                 return ME_ERRNO_INVALID_TIMEOUT;
1434         }
1435
1436         if ((start_mode != ME_START_MODE_BLOCKING)
1437             && (start_mode != ME_START_MODE_NONBLOCKING)) {
1438                 PERROR("Invalid start mode specified.\n");
1439                 return ME_ERRNO_INVALID_START_MODE;
1440         }
1441
1442         if (time_out) {
1443                 delay = (time_out * HZ) / 1000;
1444                 if (delay == 0)
1445                         delay = 1;
1446         }
1447
1448         switch (instance->status) {     //Checking actual mode.
1449         case ao_status_stream_configured:
1450         case ao_status_stream_end:
1451                 //Correct modes!
1452                 break;
1453
1454                 //The device is in wrong mode.
1455         case ao_status_none:
1456         case ao_status_single_configured:
1457         case ao_status_single_run_wait:
1458         case ao_status_single_run:
1459         case ao_status_single_end_wait:
1460                 PERROR
1461                     ("Subdevice must be preinitialize correctly for streaming.\n");
1462                 return ME_ERRNO_PREVIOUS_CONFIG;
1463
1464         case ao_status_stream_fifo_error:
1465         case ao_status_stream_buffer_error:
1466         case ao_status_stream_error:
1467                 PDEBUG("Before restart broke stream 'STOP' must be caled.\n");
1468                 return ME_STATUS_ERROR;
1469
1470         case ao_status_stream_run_wait:
1471         case ao_status_stream_run:
1472         case ao_status_stream_end_wait:
1473                 PDEBUG("Stream is already working.\n");
1474                 return ME_ERRNO_SUBDEVICE_BUSY;
1475
1476         default:
1477                 instance->status = ao_status_stream_error;
1478                 PERROR_CRITICAL("Status is in wrong state!\n");
1479                 return ME_ERRNO_INTERNAL;
1480
1481         }
1482
1483         ME_SUBDEVICE_ENTER;
1484
1485         if (instance->mode == ME4600_AO_CONTINOUS) {    //Continous
1486                 instance->circ_buf.tail += instance->preloaded_count;
1487                 instance->circ_buf.tail &= instance->circ_buf.mask;
1488         }
1489         circ_buffer_count = me_circ_buf_values(&instance->circ_buf);
1490
1491         if (!circ_buffer_count && !instance->preloaded_count) { //No values in buffer
1492                 ME_SUBDEVICE_EXIT;
1493                 PERROR("No values in buffer!\n");
1494                 return ME_ERRNO_LACK_OF_RESOURCES;
1495         }
1496
1497         //Cancel control task
1498         PDEBUG("Cancel control task. idx=%d\n", instance->ao_idx);
1499         instance->ao_control_task_flag = 0;
1500         cancel_delayed_work(&instance->ao_control_task);
1501
1502         //Stop device
1503         err = ao_stop_immediately(instance);
1504         if (err) {
1505                 PERROR_CRITICAL("FSM IS BUSY!\n");
1506                 ME_SUBDEVICE_EXIT;
1507
1508                 return ME_ERRNO_SUBDEVICE_BUSY;
1509         }
1510         //Set values for single_read()
1511         instance->single_value = ME4600_AO_MAX_DATA + 1;
1512         instance->single_value_in_fifo = ME4600_AO_MAX_DATA + 1;
1513
1514         //Setting stop points
1515         if (instance->stop_mode == ME4600_AO_SCAN_STOP_MODE) {
1516                 instance->stop_data_count =
1517                     instance->stop_count * circ_buffer_count;
1518         } else {
1519                 instance->stop_data_count = instance->stop_count;
1520         }
1521
1522         if ((instance->stop_data_count != 0)
1523             && (instance->stop_data_count < circ_buffer_count)) {
1524                 PERROR("More data in buffer than previously set limit!\n");
1525         }
1526
1527         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
1528         ctrl = inl(instance->ctrl_reg);
1529         //Check FIFO
1530         if (!(ctrl & ME4600_AO_CTRL_BIT_ENABLE_FIFO)) { //FIFO wasn't enabeled. Do it. <= This should be done by user call with ME_WRITE_MODE_PRELOAD
1531                 PINFO("Enableing FIFO.\n");
1532                 ctrl |=
1533                     ME4600_AO_CTRL_BIT_ENABLE_FIFO |
1534                     ME4600_AO_CTRL_BIT_RESET_IRQ;
1535
1536                 instance->preloaded_count = 0;
1537                 instance->data_count = 0;
1538         } else {                //Block IRQ
1539                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
1540         }
1541         outl(ctrl, instance->ctrl_reg);
1542         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1543                    instance->ctrl_reg - instance->reg_base,
1544                    ctrl | ME4600_AO_CTRL_BIT_RESET_IRQ);
1545
1546         //Fill FIFO <= Generaly this should be done by user pre-load call but this is second place to do it.
1547         status = inl(instance->status_reg);
1548         if (!(status & ME4600_AO_STATUS_BIT_EF)) {      //FIFO empty
1549                 if (instance->stop_data_count == 0) {
1550                         count = ME4600_AO_FIFO_COUNT;
1551                 } else {
1552                         count =
1553                             (ME4600_AO_FIFO_COUNT <
1554                              instance->
1555                              stop_data_count) ? ME4600_AO_FIFO_COUNT :
1556                             instance->stop_data_count;
1557                 }
1558
1559                 //Copy data
1560                 count =
1561                     ao_write_data(instance, count, instance->preloaded_count);
1562
1563                 if (count < 0) {        //This should never happend!
1564                         PERROR_CRITICAL("COPY FINISH WITH ERROR!\n");
1565                         spin_unlock_irqrestore(&instance->subdevice_lock,
1566                                                cpu_flags);
1567                         ME_SUBDEVICE_EXIT;
1568                         return ME_ERRNO_INTERNAL;
1569                 }
1570         }
1571         //Set pre-load features.
1572         spin_lock(instance->preload_reg_lock);
1573         synch = inl(instance->preload_reg);
1574         synch &=
1575             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) << instance->
1576               ao_idx);
1577         synch |=
1578             (instance->start_mode & ~ME4600_AO_EXT_TRIG) << instance->ao_idx;
1579         outl(synch, instance->preload_reg);
1580         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1581                    instance->preload_reg - instance->reg_base, synch);
1582         spin_unlock(instance->preload_reg_lock);
1583
1584         //Default count is '0'
1585         if (instance->mode == ME4600_AO_CONTINOUS) {    //Continous
1586                 instance->preloaded_count = 0;
1587                 instance->circ_buf.tail += count;
1588                 instance->circ_buf.tail &= instance->circ_buf.mask;
1589         } else {                //Wraparound
1590                 instance->preloaded_count += count;
1591                 instance->data_count += count;
1592
1593                 //Special case: Infinite wraparound with less than FIFO datas always should runs in hardware mode.
1594                 if ((instance->stop_mode == ME4600_AO_INF_STOP_MODE)
1595                     && (circ_buffer_count <= ME4600_AO_FIFO_COUNT)) {   //Change to hardware wraparound
1596                         PDEBUG
1597                             ("Changeing mode from software wraparound to hardware wraparound.\n");
1598                         //Copy all data
1599                         count =
1600                             ao_write_data(instance, circ_buffer_count,
1601                                           instance->preloaded_count);
1602                         ctrl &= ~ME4600_AO_CTRL_MODE_MASK;
1603                         ctrl |= ME4600_AO_MODE_WRAPAROUND;
1604                 }
1605
1606                 if (instance->preloaded_count == me_circ_buf_values(&instance->circ_buf)) {     //Reset position indicator.
1607                         instance->preloaded_count = 0;
1608                 } else if (instance->preloaded_count > me_circ_buf_values(&instance->circ_buf)) {       //This should never happend!
1609                         PERROR_CRITICAL
1610                             ("PRELOADED MORE VALUES THAN ARE IN BUFFER!\n");
1611                         spin_unlock_irqrestore(&instance->subdevice_lock,
1612                                                cpu_flags);
1613                         ME_SUBDEVICE_EXIT;
1614                         return ME_ERRNO_INTERNAL;
1615                 }
1616         }
1617
1618         //Set status to 'wait for start'
1619         instance->status = ao_status_stream_run_wait;
1620
1621         status = inl(instance->status_reg);
1622         //Start state machine and interrupts
1623         ctrl &= ~(ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
1624         if (instance->start_mode == ME4600_AO_EXT_TRIG) {       // External trigger.
1625                 PINFO("External trigger.\n");
1626                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
1627         }
1628         if (!(status & ME4600_AO_STATUS_BIT_HF)) {      //More than half!
1629                 if ((ctrl & ME4600_AO_CTRL_MODE_MASK) == ME4600_AO_MODE_CONTINUOUS) {   //Enable IRQ only when hardware_continous is set and FIFO is more than half
1630                         ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
1631                         ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
1632                 }
1633         }
1634         outl(ctrl, instance->ctrl_reg);
1635         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
1636                    instance->ctrl_reg - instance->reg_base, ctrl);
1637         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
1638
1639         //Trigger output
1640         if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {       //Trigger outputs
1641                 spin_lock(instance->preload_reg_lock);
1642                 synch = inl(instance->preload_reg);
1643                 //Add channel to start list
1644                 outl(synch | (ME4600_AO_SYNC_HOLD << instance->ao_idx),
1645                      instance->preload_reg);
1646                 PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
1647                            instance->reg_base,
1648                            instance->preload_reg - instance->reg_base,
1649                            synch | (ME4600_AO_SYNC_HOLD << instance->ao_idx));
1650
1651                 //Fire
1652                 PINFO
1653                     ("Fired all software synchronous outputs by software trigger.\n");
1654                 outl(0x8000, instance->single_reg);
1655                 PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
1656                            instance->reg_base,
1657                            instance->single_reg - instance->reg_base, 0x8000);
1658
1659                 //Restore save settings
1660                 outl(synch, instance->preload_reg);
1661                 PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
1662                            instance->reg_base,
1663                            instance->preload_reg - instance->reg_base, synch);
1664                 spin_unlock(instance->preload_reg_lock);
1665         } else if (!instance->start_mode) {     //Trigger outputs
1666 /*
1667                 //Remove channel from start list.       // <== Unnecessary. Removed.
1668                 spin_lock(instance->preload_reg_lock);
1669                         synch = inl(instance->preload_reg);
1670                         outl(synch & ~(ME4600_AO_SYNC_HOLD << instance->ao_idx), instance->preload_reg);
1671                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, synch & ~(ME4600_AO_SYNC_HOLD << instance->ao_idx));
1672 */
1673                 //Fire
1674                 PINFO("Software trigger.\n");
1675                 outl(0x8000, instance->single_reg);
1676                 PDEBUG_REG("single_reg outl(0x%lX+0x%lX)=0x%x\n",
1677                            instance->reg_base,
1678                            instance->single_reg - instance->reg_base, 0x8000);
1679
1680 /*
1681                         //Restore save settings.        // <== Unnecessary. Removed.
1682                         outl(synch, instance->preload_reg);
1683                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base, instance->preload_reg - instance->reg_base, synch);
1684                 spin_unlock(instance->preload_reg_lock);
1685 */
1686         }
1687         // Set control task's timeout
1688         ref = jiffies;
1689         instance->timeout.delay = delay;
1690         instance->timeout.start_time = ref;
1691
1692         if (status & ME4600_AO_STATUS_BIT_HF) { //Less than half but not empty!
1693                 PINFO("Less than half.\n");
1694                 if (instance->stop_data_count != 0) {
1695                         count = ME4600_AO_FIFO_COUNT / 2;
1696                 } else {
1697                         count =
1698                             ((ME4600_AO_FIFO_COUNT / 2) <
1699                              instance->stop_data_count) ? ME4600_AO_FIFO_COUNT /
1700                             2 : instance->stop_data_count;
1701                 }
1702
1703                 //Copy data
1704                 count =
1705                     ao_write_data(instance, count, instance->preloaded_count);
1706
1707                 if (count < 0) {        //This should never happend!
1708                         PERROR_CRITICAL("COPY FINISH WITH ERROR!\n");
1709                         ME_SUBDEVICE_EXIT;
1710                         return ME_ERRNO_INTERNAL;
1711                 }
1712
1713                 if (instance->mode == ME4600_AO_CONTINOUS) {    //Continous
1714                         instance->circ_buf.tail += count;
1715                         instance->circ_buf.tail &= instance->circ_buf.mask;
1716                 } else {        //Wraparound
1717                         instance->data_count += count;
1718                         instance->preloaded_count += count;
1719
1720                         if (instance->preloaded_count == me_circ_buf_values(&instance->circ_buf)) {     //Reset position indicator.
1721                                 instance->preloaded_count = 0;
1722                         } else if (instance->preloaded_count > me_circ_buf_values(&instance->circ_buf)) {       //This should never happend!
1723                                 PERROR_CRITICAL
1724                                     ("PRELOADED MORE VALUES THAN ARE IN BUFFER!\n");
1725                                 ME_SUBDEVICE_EXIT;
1726                                 return ME_ERRNO_INTERNAL;
1727                         }
1728                 }
1729
1730                 status = inl(instance->status_reg);
1731                 if (!(status & ME4600_AO_STATUS_BIT_HF)) {      //More than half!
1732                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
1733                         ctrl = inl(instance->ctrl_reg);
1734                         ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
1735                         ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
1736                         outl(ctrl, instance->ctrl_reg);
1737                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
1738                                    instance->reg_base,
1739                                    instance->ctrl_reg - instance->reg_base,
1740                                    ctrl);
1741                         spin_unlock_irqrestore(&instance->subdevice_lock,
1742                                                cpu_flags);
1743                 }
1744         }
1745         //Special case: Limited wraparound with less than HALF FIFO datas need work around to generate first interrupt.
1746         if ((instance->stop_mode != ME4600_AO_INF_STOP_MODE)
1747             && (instance->mode == ME4600_AO_SW_WRAP_MODE)
1748             && (circ_buffer_count <= (ME4600_AO_FIFO_COUNT / 2))) {     //Put more data to FIFO
1749                 PINFO("Limited wraparound with less than HALF FIFO datas.\n");
1750                 if (instance->preloaded_count) {        //This should never happend!
1751                         PERROR_CRITICAL
1752                             ("ERROR WHEN LOADING VALUES FOR WRAPAROUND!\n");
1753                         ME_SUBDEVICE_EXIT;
1754                         return ME_ERRNO_INTERNAL;
1755                 }
1756
1757                 while (instance->stop_data_count > instance->data_count) {      //Maximum data not set jet.
1758                         //Copy to buffer
1759                         if (circ_buffer_count != ao_write_data(instance, circ_buffer_count, 0)) {       //This should never happend!
1760                                 PERROR_CRITICAL
1761                                     ("ERROR WHEN LOADING VALUES FOR WRAPAROUND!\n");
1762                                 ME_SUBDEVICE_EXIT;
1763                                 return ME_ERRNO_INTERNAL;
1764                         }
1765                         instance->data_count += circ_buffer_count;
1766
1767                         if (!((status = inl(instance->status_reg)) & ME4600_AO_STATUS_BIT_HF)) {        //FIFO is more than half. Enable IRQ and end copy.
1768                                 spin_lock_irqsave(&instance->subdevice_lock,
1769                                                   cpu_flags);
1770                                 ctrl = inl(instance->ctrl_reg);
1771                                 ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
1772                                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
1773                                 outl(ctrl, instance->ctrl_reg);
1774                                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
1775                                            instance->reg_base,
1776                                            instance->ctrl_reg -
1777                                            instance->reg_base, ctrl);
1778                                 spin_unlock_irqrestore(&instance->
1779                                                        subdevice_lock,
1780                                                        cpu_flags);
1781                                 break;
1782                         }
1783                 }
1784         }
1785         // Schedule control task.
1786         instance->ao_control_task_flag = 1;
1787         queue_delayed_work(instance->me4600_workqueue,
1788                            &instance->ao_control_task, 1);
1789
1790         if (start_mode == ME_START_MODE_BLOCKING) {     //Wait for start.
1791                 //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason.
1792                 wait_event_interruptible_timeout(instance->wait_queue,
1793                                                  (instance->status !=
1794                                                   ao_status_stream_run_wait),
1795                                                  (delay) ? delay +
1796                                                  1 : LONG_MAX);
1797
1798                 if ((instance->status != ao_status_stream_run)
1799                     && (instance->status != ao_status_stream_end)) {
1800                         PDEBUG("Starting stream canceled. %d\n",
1801                                instance->status);
1802                         err = ME_ERRNO_CANCELLED;
1803                 }
1804
1805                 if (signal_pending(current)) {
1806                         PERROR("Wait on start of state machine interrupted.\n");
1807                         instance->status = ao_status_none;
1808                         ao_stop_immediately(instance);
1809                         err = ME_ERRNO_SIGNAL;
1810                 } else if ((delay) && ((jiffies - ref) >= delay)) {
1811                         if (instance->status != ao_status_stream_run) {
1812                                 if (instance->status == ao_status_stream_end) {
1813                                         PDEBUG("Timeout reached.\n");
1814                                 } else {
1815                                         if ((jiffies - ref) > delay) {
1816                                                 PERROR
1817                                                     ("Timeout reached. Not handled by control task!\n");
1818                                         } else {
1819                                                 PERROR
1820                                                     ("Timeout reached. Signal come but status is strange: %d\n",
1821                                                      instance->status);
1822                                         }
1823                                         ao_stop_immediately(instance);
1824                                 }
1825
1826                                 instance->ao_control_task_flag = 0;
1827                                 cancel_delayed_work(&instance->ao_control_task);
1828                                 instance->status = ao_status_stream_end;
1829                                 err = ME_ERRNO_TIMEOUT;
1830                         }
1831                 }
1832         }
1833
1834         ME_SUBDEVICE_EXIT;
1835         return err;
1836 }
1837
1838 static int me4600_ao_io_stream_status(me_subdevice_t *subdevice,
1839                                       struct file *filep,
1840                                       int wait,
1841                                       int *status, int *values, int flags)
1842 {
1843         me4600_ao_subdevice_t *instance;
1844         int err = ME_ERRNO_SUCCESS;
1845
1846         instance = (me4600_ao_subdevice_t *) subdevice;
1847
1848         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1849
1850         if (!instance->fifo) {
1851                 PERROR("Not a streaming ao.\n");
1852                 return ME_ERRNO_NOT_SUPPORTED;
1853         }
1854
1855         if (flags) {
1856                 PERROR("Invalid flag specified.\n");
1857                 return ME_ERRNO_INVALID_FLAGS;
1858         }
1859
1860         if ((wait != ME_WAIT_NONE) && (wait != ME_WAIT_IDLE)) {
1861                 PERROR("Invalid wait argument specified.\n");
1862                 *status = ME_STATUS_INVALID;
1863                 return ME_ERRNO_INVALID_WAIT;
1864         }
1865
1866         ME_SUBDEVICE_ENTER;
1867
1868         switch (instance->status) {
1869         case ao_status_single_configured:
1870         case ao_status_single_end:
1871         case ao_status_stream_configured:
1872         case ao_status_stream_end:
1873         case ao_status_stream_fifo_error:
1874         case ao_status_stream_buffer_error:
1875         case ao_status_stream_error:
1876                 *status = ME_STATUS_IDLE;
1877                 break;
1878
1879         case ao_status_single_run_wait:
1880         case ao_status_single_run:
1881         case ao_status_single_end_wait:
1882         case ao_status_stream_run_wait:
1883         case ao_status_stream_run:
1884         case ao_status_stream_end_wait:
1885                 *status = ME_STATUS_BUSY;
1886                 break;
1887
1888         case ao_status_none:
1889         default:
1890                 *status =
1891                     (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ?
1892                     ME_STATUS_BUSY : ME_STATUS_IDLE;
1893                 break;
1894         }
1895
1896         if ((wait == ME_WAIT_IDLE) && (*status == ME_STATUS_BUSY)) {
1897                 //Only runing process will interrupt this call. Events are signaled when status change. Extra timeout add for safe reason.
1898                 wait_event_interruptible_timeout(instance->wait_queue,
1899                                                  ((instance->status !=
1900                                                    ao_status_single_run_wait)
1901                                                   && (instance->status !=
1902                                                       ao_status_single_run)
1903                                                   && (instance->status !=
1904                                                       ao_status_single_end_wait)
1905                                                   && (instance->status !=
1906                                                       ao_status_stream_run_wait)
1907                                                   && (instance->status !=
1908                                                       ao_status_stream_run)
1909                                                   && (instance->status !=
1910                                                       ao_status_stream_end_wait)),
1911                                                  LONG_MAX);
1912
1913                 if (instance->status != ao_status_stream_end) {
1914                         PDEBUG("Wait for IDLE canceled. %d\n",
1915                                instance->status);
1916                         err = ME_ERRNO_CANCELLED;
1917                 }
1918
1919                 if (signal_pending(current)) {
1920                         PERROR("Wait for IDLE interrupted.\n");
1921                         instance->status = ao_status_none;
1922                         ao_stop_immediately(instance);
1923                         err = ME_ERRNO_SIGNAL;
1924                 }
1925
1926                 *status = ME_STATUS_IDLE;
1927         }
1928
1929         *values = me_circ_buf_space(&instance->circ_buf);
1930
1931         ME_SUBDEVICE_EXIT;
1932
1933         return err;
1934 }
1935
1936 static int me4600_ao_io_stream_stop(me_subdevice_t *subdevice,
1937                                     struct file *filep,
1938                                     int stop_mode, int flags)
1939 {                               // Stop work and empty buffer and FIFO
1940         int err = ME_ERRNO_SUCCESS;
1941         me4600_ao_subdevice_t *instance;
1942         unsigned long cpu_flags;
1943         volatile uint32_t ctrl;
1944
1945         instance = (me4600_ao_subdevice_t *) subdevice;
1946
1947         PDEBUG("executed. idx=%d\n", instance->ao_idx);
1948
1949         if (flags & ~ME_IO_STREAM_STOP_PRESERVE_BUFFERS) {
1950                 PERROR("Invalid flag specified.\n");
1951                 return ME_ERRNO_INVALID_FLAGS;
1952         }
1953
1954         if ((stop_mode != ME_STOP_MODE_IMMEDIATE)
1955             && (stop_mode != ME_STOP_MODE_LAST_VALUE)) {
1956                 PERROR("Invalid stop mode specified.\n");
1957                 return ME_ERRNO_INVALID_STOP_MODE;
1958         }
1959
1960         if (!instance->fifo) {
1961                 PERROR("Not a streaming ao.\n");
1962                 return ME_ERRNO_NOT_SUPPORTED;
1963         }
1964
1965         if (instance->status < ao_status_stream_configured) {
1966                 //There is nothing to stop!
1967                 PERROR("Subdevice not in streaming mode. %d\n",
1968                        instance->status);
1969                 return ME_ERRNO_PREVIOUS_CONFIG;
1970         }
1971
1972         ME_SUBDEVICE_ENTER;
1973
1974         //Mark as stopping. => Software stop.
1975         instance->status = ao_status_stream_end_wait;
1976
1977         if (stop_mode == ME_STOP_MODE_IMMEDIATE) {      //Stopped now!
1978                 err = ao_stop_immediately(instance);
1979         } else if (stop_mode == ME_STOP_MODE_LAST_VALUE) {
1980                 ctrl = inl(instance->ctrl_reg) & ME4600_AO_CTRL_MODE_MASK;
1981                 if (ctrl == ME4600_AO_MODE_WRAPAROUND) {        //Hardware wraparound => Hardware stop.
1982                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
1983                         ctrl = inl(instance->ctrl_reg);
1984                         ctrl |=
1985                             ME4600_AO_CTRL_BIT_STOP |
1986                             ME4600_AO_CTRL_BIT_RESET_IRQ;
1987                         ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
1988                         outl(ctrl, instance->ctrl_reg);
1989                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
1990                                    instance->reg_base,
1991                                    instance->ctrl_reg - instance->reg_base,
1992                                    ctrl);
1993                         spin_unlock_irqrestore(&instance->subdevice_lock,
1994                                                cpu_flags);
1995                 }
1996                 //Only runing process will interrupt this call. Events are signaled when status change.
1997                 wait_event_interruptible_timeout(instance->wait_queue,
1998                                                  (instance->status !=
1999                                                   ao_status_stream_end_wait),
2000                                                  LONG_MAX);
2001
2002                 if (instance->status != ao_status_stream_end) {
2003                         PDEBUG("Stopping stream canceled.\n");
2004                         err = ME_ERRNO_CANCELLED;
2005                 }
2006
2007                 if (signal_pending(current)) {
2008                         PERROR("Stopping stream interrupted.\n");
2009                         instance->status = ao_status_none;
2010                         ao_stop_immediately(instance);
2011                         err = ME_ERRNO_SIGNAL;
2012                 }
2013         }
2014
2015         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2016         ctrl = inl(instance->ctrl_reg);
2017         ctrl |=
2018             ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP |
2019             ME4600_AO_CTRL_BIT_RESET_IRQ;
2020         ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2021         if (!flags) {           //Reset FIFO
2022                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_FIFO;
2023         }
2024         outl(ctrl, instance->ctrl_reg);
2025         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
2026                    instance->ctrl_reg - instance->reg_base, ctrl);
2027         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
2028
2029         if (!flags) {           //Reset software buffer
2030                 instance->circ_buf.head = 0;
2031                 instance->circ_buf.tail = 0;
2032                 instance->preloaded_count = 0;
2033                 instance->data_count = 0;
2034         }
2035
2036         ME_SUBDEVICE_EXIT;
2037
2038         return err;
2039 }
2040
2041 static int me4600_ao_io_stream_write(me_subdevice_t *subdevice,
2042                                      struct file *filep,
2043                                      int write_mode,
2044                                      int *values, int *count, int flags)
2045 {
2046         int err = ME_ERRNO_SUCCESS;
2047         me4600_ao_subdevice_t *instance;
2048         unsigned long cpu_flags = 0;
2049         uint32_t reg_copy;
2050
2051         int copied_from_user = 0;
2052         int left_to_copy_from_user = *count;
2053
2054         int copied_values;
2055
2056         instance = (me4600_ao_subdevice_t *) subdevice;
2057
2058         PDEBUG("executed. idx=%d\n", instance->ao_idx);
2059
2060         //Checking arguments
2061         if (!instance->fifo) {
2062                 PERROR("Not a streaming ao.\n");
2063                 return ME_ERRNO_NOT_SUPPORTED;
2064         }
2065
2066         if (flags) {
2067                 PERROR("Invalid flag specified.\n");
2068                 return ME_ERRNO_INVALID_FLAGS;
2069         }
2070
2071         if (*count <= 0) {
2072                 PERROR("Invalid count of values specified.\n");
2073                 return ME_ERRNO_INVALID_VALUE_COUNT;
2074         }
2075
2076         if (values == NULL) {
2077                 PERROR("Invalid address of values specified.\n");
2078                 return ME_ERRNO_INVALID_POINTER;
2079         }
2080
2081         if ((instance->status == ao_status_none) || (instance->status == ao_status_single_configured)) {        //The device is in single mode.
2082                 PERROR
2083                     ("Subdevice must be preinitialize correctly for streaming.\n");
2084                 return ME_ERRNO_PREVIOUS_CONFIG;
2085         }
2086 /// @note If no 'pre-load' is used. stream_start() will move data to FIFO.
2087         switch (write_mode) {
2088         case ME_WRITE_MODE_PRELOAD:
2089
2090                 //Device must be stopped.
2091                 if ((instance->status != ao_status_stream_configured)
2092                     && (instance->status != ao_status_stream_end)) {
2093                         PERROR
2094                             ("Subdevice mustn't be runing when 'pre-load' mode is used.\n");
2095                         return ME_ERRNO_PREVIOUS_CONFIG;
2096                 }
2097                 break;
2098         case ME_WRITE_MODE_NONBLOCKING:
2099         case ME_WRITE_MODE_BLOCKING:
2100                 /// @note In blocking mode: When device is not runing and there is not enought space call will blocked up!
2101                 /// @note Some other thread must empty buffer by starting engine.
2102                 break;
2103
2104         default:
2105                 PERROR("Invalid write mode specified.\n");
2106                 return ME_ERRNO_INVALID_WRITE_MODE;
2107         }
2108
2109         if (instance->mode & ME4600_AO_WRAP_MODE) {     //Wraparound mode. Device must be stopped.
2110                 if ((instance->status != ao_status_stream_configured)
2111                     && (instance->status != ao_status_stream_end)) {
2112                         PERROR
2113                             ("Subdevice mustn't be runing when 'pre-load' mode is used.\n");
2114                         return ME_ERRNO_INVALID_WRITE_MODE;
2115                 }
2116         }
2117
2118         if ((instance->mode == ME4600_AO_HW_WRAP_MODE) && (write_mode != ME_WRITE_MODE_PRELOAD)) {      // hardware wrap_around mode.
2119                 //This is transparent for user.
2120                 PDEBUG("Changing write_mode to ME_WRITE_MODE_PRELOAD.\n");
2121                 write_mode = ME_WRITE_MODE_PRELOAD;
2122         }
2123
2124         ME_SUBDEVICE_ENTER;
2125
2126         if (write_mode == ME_WRITE_MODE_PRELOAD) {      //Init enviroment - preload
2127                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2128                 reg_copy = inl(instance->ctrl_reg);
2129                 //Check FIFO
2130                 if (!(reg_copy & ME4600_AO_CTRL_BIT_ENABLE_FIFO)) {     //FIFO not active. Enable it.
2131                         reg_copy |= ME4600_AO_CTRL_BIT_ENABLE_FIFO;
2132                         outl(reg_copy, instance->ctrl_reg);
2133                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2134                                    instance->reg_base,
2135                                    instance->ctrl_reg - instance->reg_base,
2136                                    reg_copy);
2137                         instance->preloaded_count = 0;
2138                 }
2139                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
2140         }
2141
2142         while (1) {
2143                 //Copy to buffer. This step is common for all modes.
2144                 copied_from_user =
2145                     ao_get_data_from_user(instance, left_to_copy_from_user,
2146                                           values + (*count -
2147                                                     left_to_copy_from_user));
2148                 left_to_copy_from_user -= copied_from_user;
2149
2150                 reg_copy = inl(instance->status_reg);
2151                 if ((instance->status == ao_status_stream_run) && !(reg_copy & ME4600_AO_STATUS_BIT_FSM)) {     //BROKEN PIPE! The state machine is stoped but logical status show that should be working.
2152                         PERROR("Broken pipe in write.\n");
2153                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
2154                         break;
2155                 }
2156
2157                 if ((instance->status == ao_status_stream_run) && (instance->mode == ME4600_AO_CONTINOUS) && (reg_copy & ME4600_AO_STATUS_BIT_HF)) {    //Continous mode runing and data are below half!
2158
2159                         // Block interrupts.
2160                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2161                         reg_copy = inl(instance->ctrl_reg);
2162                         //reg_copy &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2163                         reg_copy |= ME4600_AO_CTRL_BIT_RESET_IRQ;
2164                         outl(reg_copy, instance->ctrl_reg);
2165                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2166                                    instance->reg_base,
2167                                    instance->ctrl_reg - instance->reg_base,
2168                                    reg_copy);
2169                         spin_unlock_irqrestore(&instance->subdevice_lock,
2170                                                cpu_flags);
2171
2172                         //Fast copy
2173                         copied_values =
2174                             ao_write_data(instance, ME4600_AO_FIFO_COUNT / 2,
2175                                           0);
2176                         if (copied_values > 0) {
2177                                 instance->circ_buf.tail += copied_values;
2178                                 instance->circ_buf.tail &=
2179                                     instance->circ_buf.mask;
2180                                 continue;
2181                         }
2182                         // Activate interrupts.
2183                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2184                         reg_copy = inl(instance->ctrl_reg);
2185                         //reg_copy |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2186                         reg_copy &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
2187                         outl(reg_copy, instance->ctrl_reg);
2188                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2189                                    instance->reg_base,
2190                                    instance->ctrl_reg - instance->reg_base,
2191                                    reg_copy);
2192                         spin_unlock_irqrestore(&instance->subdevice_lock,
2193                                                cpu_flags);
2194
2195                         if (copied_values == 0) {       //This was checked and never should happend!
2196                                 PERROR_CRITICAL("COPING FINISH WITH 0!\n");
2197                         }
2198
2199                         if (copied_values < 0) {        //This was checked and never should happend!
2200                                 PERROR_CRITICAL
2201                                     ("COPING FINISH WITH AN ERROR!\n");
2202                                 instance->status = ao_status_stream_fifo_error;
2203                                 err = ME_ERRNO_FIFO_BUFFER_OVERFLOW;
2204                                 break;
2205                         }
2206                 }
2207
2208                 if (!left_to_copy_from_user) {  //All datas were copied.
2209                         break;
2210                 } else {        //Not all datas were copied.
2211                         if (instance->mode & ME4600_AO_WRAP_MODE) {     //Error too much datas! Wraparound is limited in size!
2212                                 PERROR
2213                                     ("Too much data for wraparound mode!  Exceeded size of %ld.\n",
2214                                      ME4600_AO_CIRC_BUF_COUNT - 1);
2215                                 err = ME_ERRNO_RING_BUFFER_OVERFLOW;
2216                                 break;
2217                         }
2218
2219                         if (write_mode != ME_WRITE_MODE_BLOCKING) {     //Non blocking calls
2220                                 break;
2221                         }
2222
2223                         wait_event_interruptible(instance->wait_queue,
2224                                                  me_circ_buf_space(&instance->
2225                                                                    circ_buf));
2226
2227                         if (signal_pending(current)) {
2228                                 PERROR("Writing interrupted by signal.\n");
2229                                 instance->status = ao_status_none;
2230                                 ao_stop_immediately(instance);
2231                                 err = ME_ERRNO_SIGNAL;
2232                                 break;
2233                         }
2234
2235                         if (instance->status == ao_status_none) {       //Reset
2236                                 PERROR("Writing interrupted by reset.\n");
2237                                 err = ME_ERRNO_CANCELLED;
2238                                 break;
2239                         }
2240                 }
2241         }
2242
2243         if (write_mode == ME_WRITE_MODE_PRELOAD) {      //Copy data to FIFO - preload
2244                 copied_values =
2245                     ao_write_data_pooling(instance, ME4600_AO_FIFO_COUNT,
2246                                           instance->preloaded_count);
2247                 instance->preloaded_count += copied_values;
2248                 instance->data_count += copied_values;
2249
2250                 if ((instance->mode == ME4600_AO_HW_WRAP_MODE)
2251                     && (me_circ_buf_values(&instance->circ_buf) >
2252                         ME4600_AO_FIFO_COUNT)) {
2253                         PERROR
2254                             ("Too much data for hardware wraparound mode! Exceeded size of %d.\n",
2255                              ME4600_AO_FIFO_COUNT);
2256                         err = ME_ERRNO_FIFO_BUFFER_OVERFLOW;
2257                 }
2258         }
2259
2260         *count = *count - left_to_copy_from_user;
2261         ME_SUBDEVICE_EXIT;
2262
2263         return err;
2264 }
2265 static irqreturn_t me4600_ao_isr(int irq, void *dev_id)
2266 {
2267         me4600_ao_subdevice_t *instance = dev_id;
2268         uint32_t irq_status;
2269         uint32_t ctrl;
2270         uint32_t status;
2271         int count = 0;
2272
2273         PDEBUG("executed. idx=%d\n", instance->ao_idx);
2274
2275         if (irq != instance->irq) {
2276                 PERROR("Incorrect interrupt num: %d.\n", irq);
2277                 return IRQ_NONE;
2278         }
2279
2280         irq_status = inl(instance->irq_status_reg);
2281         if (!(irq_status & (ME4600_IRQ_STATUS_BIT_AO_HF << instance->ao_idx))) {
2282                 PINFO("%ld Shared interrupt. %s(): ID=%d: status_reg=0x%04X\n",
2283                       jiffies, __func__, instance->ao_idx, irq_status);
2284                 return IRQ_NONE;
2285         }
2286
2287         if (!instance->circ_buf.buf) {
2288                 instance->status = ao_status_stream_error;
2289                 PERROR_CRITICAL("CIRCULAR BUFFER NOT EXISTS!\n");
2290                 //Block interrupts. Stop machine.
2291                 ctrl = inl(instance->ctrl_reg);
2292                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2293                 ctrl |=
2294                     ME4600_AO_CTRL_BIT_RESET_IRQ |
2295                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_STOP;
2296                 outl(ctrl, instance->ctrl_reg);
2297                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2298                            instance->reg_base,
2299                            instance->ctrl_reg - instance->reg_base, ctrl);
2300
2301                 //Inform user
2302                 wake_up_interruptible_all(&instance->wait_queue);
2303                 return IRQ_HANDLED;
2304         }
2305
2306         status = inl(instance->status_reg);
2307         if (!(status & ME4600_AO_STATUS_BIT_FSM)) {     //Too late. Not working! END? BROKEN PIPE?
2308                 PDEBUG("Interrupt come but ISM is not working!\n");
2309                 //Block interrupts. Stop machine.
2310                 ctrl = inl(instance->ctrl_reg);
2311                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2312                 ctrl |=
2313                     ME4600_AO_CTRL_BIT_RESET_IRQ | ME4600_AO_CTRL_BIT_STOP |
2314                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
2315                 outl(ctrl, instance->ctrl_reg);
2316                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2317                            instance->reg_base,
2318                            instance->ctrl_reg - instance->reg_base, ctrl);
2319
2320                 return IRQ_HANDLED;
2321         }
2322         //General procedure. Process more datas.
2323
2324 #ifdef MEDEBUG_DEBUG
2325         if (!me_circ_buf_values(&instance->circ_buf)) { //Buffer is empty!
2326                 PDEBUG("Circular buffer empty!\n");
2327         }
2328 #endif
2329
2330         //Check FIFO
2331         if (status & ME4600_AO_STATUS_BIT_HF) { //OK less than half
2332
2333                 //Block interrupts
2334                 ctrl = inl(instance->ctrl_reg);
2335                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2336                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
2337                 outl(ctrl, instance->ctrl_reg);
2338                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2339                            instance->reg_base,
2340                            instance->ctrl_reg - instance->reg_base, ctrl);
2341
2342                 do {
2343                         //Calculate how many should be copied.
2344                         count =
2345                             (instance->stop_data_count) ? instance->
2346                             stop_data_count -
2347                             instance->data_count : ME4600_AO_FIFO_COUNT / 2;
2348                         if (ME4600_AO_FIFO_COUNT / 2 < count) {
2349                                 count = ME4600_AO_FIFO_COUNT / 2;
2350                         }
2351                         //Copy data
2352                         if (instance->mode == ME4600_AO_CONTINOUS) {    //Continous
2353                                 count = ao_write_data(instance, count, 0);
2354                                 if (count > 0) {
2355                                         instance->circ_buf.tail += count;
2356                                         instance->circ_buf.tail &=
2357                                             instance->circ_buf.mask;
2358                                         instance->data_count += count;
2359
2360                                         if ((instance->status == ao_status_stream_end_wait) && !me_circ_buf_values(&instance->circ_buf)) {      //Stoping. Whole buffer was copied.
2361                                                 break;
2362                                         }
2363                                 }
2364                         } else if ((instance->mode == ME4600_AO_SW_WRAP_MODE) && ((ctrl & ME4600_AO_CTRL_MODE_MASK) == ME4600_AO_MODE_CONTINUOUS)) {    //Wraparound (software)
2365                                 if (instance->status == ao_status_stream_end_wait) {    //We stoping => Copy to the end of the buffer.
2366                                         count =
2367                                             ao_write_data(instance, count, 0);
2368                                 } else {        //Copy in wraparound mode.
2369                                         count =
2370                                             ao_write_data_wraparound(instance,
2371                                                                      count,
2372                                                                      instance->
2373                                                                      preloaded_count);
2374                                 }
2375
2376                                 if (count > 0) {
2377                                         instance->data_count += count;
2378                                         instance->preloaded_count += count;
2379                                         instance->preloaded_count %=
2380                                             me_circ_buf_values(&instance->
2381                                                                circ_buf);
2382
2383                                         if ((instance->status == ao_status_stream_end_wait) && !instance->preloaded_count) {    //Stoping. Whole buffer was copied.
2384                                                 break;
2385                                         }
2386                                 }
2387                         }
2388
2389                         if ((count <= 0) || (instance->stop_data_count && (instance->stop_data_count <= instance->data_count))) {       //End of work.
2390                                 break;
2391                         }
2392                 }               //Repeat if still is under half fifo
2393                 while ((status =
2394                         inl(instance->status_reg)) & ME4600_AO_STATUS_BIT_HF);
2395
2396                 //Unblock interrupts
2397                 ctrl = inl(instance->ctrl_reg);
2398                 if (count >= 0) {       //Copy was successful.
2399                         if (instance->stop_data_count && (instance->stop_data_count <= instance->data_count)) { //Finishing work. No more interrupts.
2400                                 PDEBUG("Finishing work. Interrupt disabled.\n");
2401                                 instance->status = ao_status_stream_end_wait;
2402                         } else if (count > 0) { //Normal work. Enable interrupt.
2403                                 PDEBUG("Normal work. Enable interrupt.\n");
2404                                 ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
2405                                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2406                         } else {        //Normal work but there are no more data in buffer. Interrupt active but blocked. stream_write() will unblock it.
2407                                 PDEBUG
2408                                     ("No data in software buffer. Interrupt blocked.\n");
2409                                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
2410                         }
2411                 } else {        //Error during copy.
2412                         instance->status = ao_status_stream_fifo_error;
2413                 }
2414
2415                 outl(ctrl, instance->ctrl_reg);
2416                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2417                            instance->reg_base,
2418                            instance->ctrl_reg - instance->reg_base, ctrl);
2419         } else {                //?? more than half
2420                 PDEBUG
2421                     ("Interrupt come but FIFO more than half full! Reset interrupt.\n");
2422                 //Reset pending interrupt
2423                 ctrl = inl(instance->ctrl_reg);
2424                 ctrl |= ME4600_AO_CTRL_BIT_RESET_IRQ;
2425                 outl(ctrl, instance->ctrl_reg);
2426                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2427                            instance->reg_base,
2428                            instance->ctrl_reg - instance->reg_base, ctrl);
2429                 ctrl &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
2430                 outl(ctrl, instance->ctrl_reg);
2431                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2432                            instance->reg_base,
2433                            instance->ctrl_reg - instance->reg_base, ctrl);
2434         }
2435
2436         PINFO("ISR: Buffer count: %d.(T:%d H:%d)\n",
2437               me_circ_buf_values(&instance->circ_buf), instance->circ_buf.tail,
2438               instance->circ_buf.head);
2439         PINFO("ISR: Stop count: %d.\n", instance->stop_count);
2440         PINFO("ISR: Stop data count: %d.\n", instance->stop_data_count);
2441         PINFO("ISR: Data count: %d.\n", instance->data_count);
2442
2443         //Inform user
2444         wake_up_interruptible_all(&instance->wait_queue);
2445
2446         return IRQ_HANDLED;
2447 }
2448
2449 static void me4600_ao_destructor(struct me_subdevice *subdevice)
2450 {
2451         me4600_ao_subdevice_t *instance;
2452
2453         instance = (me4600_ao_subdevice_t *) subdevice;
2454
2455         PDEBUG("executed. idx=%d\n", instance->ao_idx);
2456
2457         instance->ao_control_task_flag = 0;
2458
2459         // Reset subdevice to asure clean exit.
2460         me4600_ao_io_reset_subdevice(subdevice, NULL,
2461                                      ME_IO_RESET_SUBDEVICE_NO_FLAGS);
2462
2463         // Remove any tasks from work queue. This is paranoic because it was done allready in reset().
2464         if (!cancel_delayed_work(&instance->ao_control_task)) { //Wait 2 ticks to be sure that control task is removed from queue.
2465                 set_current_state(TASK_INTERRUPTIBLE);
2466                 schedule_timeout(2);
2467         }
2468
2469         if (instance->fifo) {
2470                 if (instance->irq) {
2471                         free_irq(instance->irq, instance);
2472                         instance->irq = 0;
2473                 }
2474
2475                 if (instance->circ_buf.buf) {
2476                         free_pages((unsigned long)instance->circ_buf.buf,
2477                                    ME4600_AO_CIRC_BUF_SIZE_ORDER);
2478                 }
2479                 instance->circ_buf.buf = NULL;
2480         }
2481
2482         me_subdevice_deinit(&instance->base);
2483         kfree(instance);
2484 }
2485
2486 me4600_ao_subdevice_t *me4600_ao_constructor(uint32_t reg_base,
2487                                              spinlock_t *preload_reg_lock,
2488                                              uint32_t *preload_flags,
2489                                              int ao_idx,
2490                                              int fifo,
2491                                              int irq,
2492                                              struct workqueue_struct *me4600_wq)
2493 {
2494         me4600_ao_subdevice_t *subdevice;
2495         int err;
2496
2497         PDEBUG("executed. idx=%d\n", ao_idx);
2498
2499         // Allocate memory for subdevice instance.
2500         subdevice = kmalloc(sizeof(me4600_ao_subdevice_t), GFP_KERNEL);
2501
2502         if (!subdevice) {
2503                 PERROR("Cannot get memory for subdevice instance.\n");
2504                 return NULL;
2505         }
2506
2507         memset(subdevice, 0, sizeof(me4600_ao_subdevice_t));
2508
2509         // Initialize subdevice base class.
2510         err = me_subdevice_init(&subdevice->base);
2511
2512         if (err) {
2513                 PERROR("Cannot initialize subdevice base class instance.\n");
2514                 kfree(subdevice);
2515                 return NULL;
2516         }
2517         // Initialize spin locks.
2518         spin_lock_init(&subdevice->subdevice_lock);
2519
2520         subdevice->preload_reg_lock = preload_reg_lock;
2521         subdevice->preload_flags = preload_flags;
2522
2523         // Store analog output index.
2524         subdevice->ao_idx = ao_idx;
2525
2526         // Store if analog output has fifo.
2527         subdevice->fifo = (ao_idx < fifo) ? 1 : 0;
2528
2529         if (subdevice->fifo) {  // Allocate and initialize circular buffer.
2530                 subdevice->circ_buf.mask = ME4600_AO_CIRC_BUF_COUNT - 1;
2531
2532                 subdevice->circ_buf.buf =
2533                     (void *)__get_free_pages(GFP_KERNEL,
2534                                              ME4600_AO_CIRC_BUF_SIZE_ORDER);
2535                 PDEBUG("circ_buf = %p size=%ld\n", subdevice->circ_buf.buf,
2536                        ME4600_AO_CIRC_BUF_SIZE);
2537
2538                 if (!subdevice->circ_buf.buf) {
2539                         PERROR
2540                             ("Cannot initialize subdevice base class instance.\n");
2541                         kfree(subdevice);
2542                         return NULL;
2543                 }
2544
2545                 memset(subdevice->circ_buf.buf, 0, ME4600_AO_CIRC_BUF_SIZE);
2546         } else {                // No FIFO.
2547                 subdevice->circ_buf.mask = 0;
2548                 subdevice->circ_buf.buf = NULL;
2549         }
2550
2551         subdevice->circ_buf.head = 0;
2552         subdevice->circ_buf.tail = 0;
2553
2554         subdevice->status = ao_status_none;
2555         subdevice->ao_control_task_flag = 0;
2556         subdevice->timeout.delay = 0;
2557         subdevice->timeout.start_time = jiffies;
2558
2559         // Initialize wait queue.
2560         init_waitqueue_head(&subdevice->wait_queue);
2561
2562         // Initialize single value to 0V.
2563         subdevice->single_value = 0x8000;
2564         subdevice->single_value_in_fifo = 0x8000;
2565
2566         // Register interrupt service routine.
2567         if (subdevice->fifo) {
2568                 subdevice->irq = irq;
2569                 if (request_irq(subdevice->irq, me4600_ao_isr,
2570 #ifdef IRQF_DISABLED
2571                                 IRQF_DISABLED | IRQF_SHARED,
2572 #else
2573                                 SA_INTERRUPT | SA_SHIRQ,
2574 #endif
2575                                 ME4600_NAME, subdevice)) {
2576                         PERROR("Cannot get interrupt line.\n");
2577                         PDEBUG("free circ_buf = %p size=%d",
2578                                subdevice->circ_buf.buf,
2579                                PAGE_SHIFT << ME4600_AO_CIRC_BUF_SIZE_ORDER);
2580                         free_pages((unsigned long)subdevice->circ_buf.buf,
2581                                    ME4600_AO_CIRC_BUF_SIZE_ORDER);
2582                         me_subdevice_deinit((me_subdevice_t *) subdevice);
2583                         kfree(subdevice);
2584                         return NULL;
2585                 }
2586                 PINFO("Registered irq=%d.\n", subdevice->irq);
2587         } else {
2588                 subdevice->irq = 0;
2589         }
2590
2591         // Initialize registers.
2592         subdevice->irq_status_reg = reg_base + ME4600_IRQ_STATUS_REG;
2593         subdevice->preload_reg = reg_base + ME4600_AO_SYNC_REG;
2594         if (ao_idx == 0) {
2595                 subdevice->ctrl_reg = reg_base + ME4600_AO_00_CTRL_REG;
2596                 subdevice->status_reg = reg_base + ME4600_AO_00_STATUS_REG;
2597                 subdevice->fifo_reg = reg_base + ME4600_AO_00_FIFO_REG;
2598                 subdevice->single_reg = reg_base + ME4600_AO_00_SINGLE_REG;
2599                 subdevice->timer_reg = reg_base + ME4600_AO_00_TIMER_REG;
2600                 subdevice->reg_base = reg_base;
2601                 subdevice->bitpattern = 0;
2602         } else if (ao_idx == 1) {
2603                 subdevice->ctrl_reg = reg_base + ME4600_AO_01_CTRL_REG;
2604                 subdevice->status_reg = reg_base + ME4600_AO_01_STATUS_REG;
2605                 subdevice->fifo_reg = reg_base + ME4600_AO_01_FIFO_REG;
2606                 subdevice->single_reg = reg_base + ME4600_AO_01_SINGLE_REG;
2607                 subdevice->timer_reg = reg_base + ME4600_AO_01_TIMER_REG;
2608                 subdevice->reg_base = reg_base;
2609                 subdevice->bitpattern = 0;
2610         } else if (ao_idx == 2) {
2611                 subdevice->ctrl_reg = reg_base + ME4600_AO_02_CTRL_REG;
2612                 subdevice->status_reg = reg_base + ME4600_AO_02_STATUS_REG;
2613                 subdevice->fifo_reg = reg_base + ME4600_AO_02_FIFO_REG;
2614                 subdevice->single_reg = reg_base + ME4600_AO_02_SINGLE_REG;
2615                 subdevice->timer_reg = reg_base + ME4600_AO_02_TIMER_REG;
2616                 subdevice->reg_base = reg_base;
2617                 subdevice->bitpattern = 0;
2618         } else if (ao_idx == 3) {
2619                 subdevice->ctrl_reg = reg_base + ME4600_AO_03_CTRL_REG;
2620                 subdevice->status_reg = reg_base + ME4600_AO_03_STATUS_REG;
2621                 subdevice->fifo_reg = reg_base + ME4600_AO_03_FIFO_REG;
2622                 subdevice->single_reg = reg_base + ME4600_AO_03_SINGLE_REG;
2623                 subdevice->timer_reg = reg_base + ME4600_AO_03_TIMER_REG;
2624                 subdevice->reg_base = reg_base;
2625                 subdevice->bitpattern = 1;
2626         } else {
2627                 PERROR_CRITICAL("WRONG SUBDEVICE idx=%d!", ao_idx);
2628                 me_subdevice_deinit((me_subdevice_t *) subdevice);
2629                 if (subdevice->fifo) {
2630                         free_pages((unsigned long)subdevice->circ_buf.buf,
2631                                    ME4600_AO_CIRC_BUF_SIZE_ORDER);
2632                 }
2633                 subdevice->circ_buf.buf = NULL;
2634                 kfree(subdevice);
2635                 return NULL;
2636         }
2637
2638         // Override base class methods.
2639         subdevice->base.me_subdevice_destructor = me4600_ao_destructor;
2640         subdevice->base.me_subdevice_io_reset_subdevice =
2641             me4600_ao_io_reset_subdevice;
2642         subdevice->base.me_subdevice_io_single_config =
2643             me4600_ao_io_single_config;
2644         subdevice->base.me_subdevice_io_single_read = me4600_ao_io_single_read;
2645         subdevice->base.me_subdevice_io_single_write =
2646             me4600_ao_io_single_write;
2647         subdevice->base.me_subdevice_io_stream_config =
2648             me4600_ao_io_stream_config;
2649         subdevice->base.me_subdevice_io_stream_new_values =
2650             me4600_ao_io_stream_new_values;
2651         subdevice->base.me_subdevice_io_stream_write =
2652             me4600_ao_io_stream_write;
2653         subdevice->base.me_subdevice_io_stream_start =
2654             me4600_ao_io_stream_start;
2655         subdevice->base.me_subdevice_io_stream_status =
2656             me4600_ao_io_stream_status;
2657         subdevice->base.me_subdevice_io_stream_stop = me4600_ao_io_stream_stop;
2658         subdevice->base.me_subdevice_query_number_channels =
2659             me4600_ao_query_number_channels;
2660         subdevice->base.me_subdevice_query_subdevice_type =
2661             me4600_ao_query_subdevice_type;
2662         subdevice->base.me_subdevice_query_subdevice_caps =
2663             me4600_ao_query_subdevice_caps;
2664         subdevice->base.me_subdevice_query_subdevice_caps_args =
2665             me4600_ao_query_subdevice_caps_args;
2666         subdevice->base.me_subdevice_query_range_by_min_max =
2667             me4600_ao_query_range_by_min_max;
2668         subdevice->base.me_subdevice_query_number_ranges =
2669             me4600_ao_query_number_ranges;
2670         subdevice->base.me_subdevice_query_range_info =
2671             me4600_ao_query_range_info;
2672         subdevice->base.me_subdevice_query_timer = me4600_ao_query_timer;
2673
2674         // Prepare work queue
2675         subdevice->me4600_workqueue = me4600_wq;
2676
2677 /* workqueue API changed in kernel 2.6.20 */
2678         INIT_DELAYED_WORK(&subdevice->ao_control_task,
2679                           me4600_ao_work_control_task);
2680
2681         if (subdevice->fifo) {  // Set speed for single operations.
2682                 outl(ME4600_AO_MIN_CHAN_TICKS - 1, subdevice->timer_reg);
2683                 subdevice->hardware_stop_delay = HZ / 10;       //100ms
2684         }
2685
2686         return subdevice;
2687 }
2688
2689 /** @brief Stop presentation. Preserve FIFOs.
2690 *
2691 * @param instance The subdevice instance (pointer).
2692 */
2693 inline int ao_stop_immediately(me4600_ao_subdevice_t *instance)
2694 {
2695         unsigned long cpu_flags;
2696         uint32_t ctrl;
2697         int timeout;
2698         int i;
2699
2700         timeout =
2701             (instance->hardware_stop_delay >
2702              (HZ / 10)) ? instance->hardware_stop_delay : HZ / 10;
2703         for (i = 0; i <= timeout; i++) {
2704                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
2705                 // Stop all actions. No conditions! Block interrupts. Leave FIFO untouched!
2706                 ctrl = inl(instance->ctrl_reg);
2707                 ctrl |=
2708                     ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
2709                     | ME4600_AO_CTRL_BIT_RESET_IRQ;
2710                 ctrl &=
2711                     ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
2712                       ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
2713                 outl(ctrl, instance->ctrl_reg);
2714                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
2715                            instance->reg_base,
2716                            instance->ctrl_reg - instance->reg_base, ctrl);
2717                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
2718
2719                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {  // Exit.
2720                         break;
2721                 }
2722                 //Still working!
2723                 set_current_state(TASK_INTERRUPTIBLE);
2724                 schedule_timeout(1);
2725         }
2726
2727         if (i > timeout) {
2728                 PERROR_CRITICAL("FSM IS BUSY!\n");
2729                 return ME_ERRNO_INTERNAL;
2730         }
2731         return ME_ERRNO_SUCCESS;
2732 }
2733
2734 /** @brief Copy data from circular buffer to fifo (fast) in wraparound.
2735 * @note This is time critical function. Checking is done at begining and end only.
2736 * @note The is not reasonable way to check how many walues was in FIFO at begining. The count must be managed externaly.
2737 *
2738 * @param instance The subdevice instance (pointer).
2739 * @param count Maximum number of copied data.
2740 * @param start_pos Position of the firs value in buffer.
2741 *
2742 * @return On success: Number of copied data.
2743 * @return On error/success: 0.  No datas were copied => no data in buffer.
2744 * @return On error: -ME_ERRNO_FIFO_BUFFER_OVERFLOW.
2745 */
2746 inline int ao_write_data_wraparound(me4600_ao_subdevice_t *instance, int count,
2747                                     int start_pos)
2748 {                               /// @note This is time critical function!
2749         uint32_t status;
2750         uint32_t value;
2751         int pos =
2752             (instance->circ_buf.tail + start_pos) & instance->circ_buf.mask;
2753         int local_count = count;
2754         int i = 1;
2755
2756         if (count <= 0) {       //Wrong count!
2757                 return 0;
2758         }
2759
2760         while (i < local_count) {
2761                 //Get value from buffer
2762                 value = *(instance->circ_buf.buf + pos);
2763                 //Prepare it
2764                 if (instance->ao_idx & 0x1) {
2765                         value <<= 16;
2766                 }
2767                 //Put value to FIFO
2768                 outl(value, instance->fifo_reg);
2769                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2770
2771                 pos++;
2772                 pos &= instance->circ_buf.mask;
2773                 if (pos == instance->circ_buf.head) {
2774                         pos = instance->circ_buf.tail;
2775                 }
2776                 i++;
2777         }
2778
2779         status = inl(instance->status_reg);
2780         if (!(status & ME4600_AO_STATUS_BIT_FF)) {      //FIFO is full before all datas were copied!
2781                 PERROR("FIFO was full before all datas were copied! idx=%d\n",
2782                        instance->ao_idx);
2783                 return -ME_ERRNO_FIFO_BUFFER_OVERFLOW;
2784         } else {                //Add last value
2785                 value = *(instance->circ_buf.buf + pos);
2786                 if (instance->ao_idx & 0x1) {
2787                         value <<= 16;
2788                 }
2789                 //Put value to FIFO
2790                 outl(value, instance->fifo_reg);
2791                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2792         }
2793
2794         PINFO("WRAPAROUND LOADED %d values. idx=%d\n", local_count,
2795               instance->ao_idx);
2796         return local_count;
2797 }
2798
2799 /** @brief Copy data from software buffer to fifo (fast).
2800 * @note This is time critical function. Checking is done at begining and end only.
2801 * @note The is not reasonable way to check how many walues was in FIFO at begining. The count must be managed externaly.
2802 *
2803 * @param instance The subdevice instance (pointer).
2804 * @param count Maximum number of copied data.
2805 * @param start_pos Position of the firs value in buffer.
2806 *
2807 * @return On success: Number of copied data.
2808 * @return On error/success: 0.  No datas were copied => no data in buffer.
2809 * @return On error: -ME_ERRNO_FIFO_BUFFER_OVERFLOW.
2810 */
2811 inline int ao_write_data(me4600_ao_subdevice_t *instance, int count,
2812                          int start_pos)
2813 {                               /// @note This is time critical function!
2814         uint32_t status;
2815         uint32_t value;
2816         int pos =
2817             (instance->circ_buf.tail + start_pos) & instance->circ_buf.mask;
2818         int local_count = count;
2819         int max_count;
2820         int i = 1;
2821
2822         if (count <= 0) {       //Wrong count!
2823                 return 0;
2824         }
2825
2826         max_count = me_circ_buf_values(&instance->circ_buf) - start_pos;
2827         if (max_count <= 0) {   //No data to copy!
2828                 return 0;
2829         }
2830
2831         if (max_count < count) {
2832                 local_count = max_count;
2833         }
2834
2835         while (i < local_count) {
2836                 //Get value from buffer
2837                 value = *(instance->circ_buf.buf + pos);
2838                 //Prepare it
2839                 if (instance->ao_idx & 0x1) {
2840                         value <<= 16;
2841                 }
2842                 //Put value to FIFO
2843                 outl(value, instance->fifo_reg);
2844                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2845
2846                 pos++;
2847                 pos &= instance->circ_buf.mask;
2848                 i++;
2849         }
2850
2851         status = inl(instance->status_reg);
2852         if (!(status & ME4600_AO_STATUS_BIT_FF)) {      //FIFO is full before all datas were copied!
2853                 PERROR("FIFO was full before all datas were copied! idx=%d\n",
2854                        instance->ao_idx);
2855                 return -ME_ERRNO_FIFO_BUFFER_OVERFLOW;
2856         } else {                //Add last value
2857                 value = *(instance->circ_buf.buf + pos);
2858                 if (instance->ao_idx & 0x1) {
2859                         value <<= 16;
2860                 }
2861                 //Put value to FIFO
2862                 outl(value, instance->fifo_reg);
2863                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2864         }
2865
2866         PINFO("FAST LOADED %d values. idx=%d\n", local_count, instance->ao_idx);
2867         return local_count;
2868 }
2869
2870 /** @brief Copy data from software buffer to fifo (slow).
2871 * @note This is slow function that copy all data from buffer to FIFO with full control.
2872 *
2873 * @param instance The subdevice instance (pointer).
2874 * @param count Maximum number of copied data.
2875 * @param start_pos Position of the firs value in buffer.
2876 *
2877 * @return On success: Number of copied values.
2878 * @return On error/success: 0.  FIFO was full at begining.
2879 * @return On error: -ME_ERRNO_RING_BUFFER_UNDEFFLOW.
2880 */
2881 inline int ao_write_data_pooling(me4600_ao_subdevice_t *instance, int count,
2882                                  int start_pos)
2883 {                               /// @note This is slow function!
2884         uint32_t status;
2885         uint32_t value;
2886         int pos =
2887             (instance->circ_buf.tail + start_pos) & instance->circ_buf.mask;
2888         int local_count = count;
2889         int i;
2890         int max_count;
2891
2892         if (count <= 0) {       //Wrong count!
2893                 PERROR("SLOW LOADED: Wrong count! idx=%d\n", instance->ao_idx);
2894                 return 0;
2895         }
2896
2897         max_count = me_circ_buf_values(&instance->circ_buf) - start_pos;
2898         if (max_count <= 0) {   //No data to copy!
2899                 PERROR("SLOW LOADED: No data to copy! idx=%d\n",
2900                        instance->ao_idx);
2901                 return 0;
2902         }
2903
2904         if (max_count < count) {
2905                 local_count = max_count;
2906         }
2907
2908         for (i = 0; i < local_count; i++) {
2909                 status = inl(instance->status_reg);
2910                 if (!(status & ME4600_AO_STATUS_BIT_FF)) {      //FIFO is full!
2911                         return i;
2912                 }
2913                 //Get value from buffer
2914                 value = *(instance->circ_buf.buf + pos);
2915                 //Prepare it
2916                 if (instance->ao_idx & 0x1) {
2917                         value <<= 16;
2918                 }
2919                 //Put value to FIFO
2920                 outl(value, instance->fifo_reg);
2921                 //PDEBUG_REG("idx=%d fifo_reg outl(0x%lX+0x%lX)=0x%x\n", instance->ao_idx, instance->reg_base, instance->fifo_reg - instance->reg_base, value);
2922
2923                 pos++;
2924                 pos &= instance->circ_buf.mask;
2925         }
2926
2927         PINFO("SLOW LOADED %d values. idx=%d\n", local_count, instance->ao_idx);
2928         return local_count;
2929 }
2930
2931 /** @brief Copy data from user space to circular buffer.
2932 * @param instance The subdevice instance (pointer).
2933 * @param count Number of datas in user space.
2934 * @param user_values Buffer's pointer.
2935 *
2936 * @return On success: Number of copied values.
2937 * @return On error: -ME_ERRNO_INTERNAL.
2938 */
2939 inline int ao_get_data_from_user(me4600_ao_subdevice_t *instance, int count,
2940                                  int *user_values)
2941 {
2942         int i, err;
2943         int empty_space;
2944         int copied;
2945         int value;
2946
2947         empty_space = me_circ_buf_space(&instance->circ_buf);
2948         //We have only this space free.
2949         copied = (count < empty_space) ? count : empty_space;
2950         for (i = 0; i < copied; i++) {  //Copy from user to buffer
2951                 if ((err = get_user(value, (int *)(user_values + i)))) {
2952                         PERROR
2953                             ("BUFFER LOADED: get_user(0x%p) return an error: %d. idx=%d\n",
2954                              user_values + i, err, instance->ao_idx);
2955                         return -ME_ERRNO_INTERNAL;
2956                 }
2957                 /// @note The analog output in me4600 series has size of 16 bits.
2958                 *(instance->circ_buf.buf + instance->circ_buf.head) =
2959                     (uint16_t) value;
2960                 instance->circ_buf.head++;
2961                 instance->circ_buf.head &= instance->circ_buf.mask;
2962         }
2963
2964         PINFO("BUFFER LOADED %d values. idx=%d\n", copied, instance->ao_idx);
2965         return copied;
2966 }
2967
2968 /** @brief Checking actual hardware and logical state.
2969 * @param instance The subdevice instance (pointer).
2970 */
2971 static void me4600_ao_work_control_task(struct work_struct *work)
2972 {
2973         me4600_ao_subdevice_t *instance;
2974         unsigned long cpu_flags = 0;
2975         uint32_t status;
2976         uint32_t ctrl;
2977         uint32_t synch;
2978         int reschedule = 0;
2979         int signaling = 0;
2980
2981         instance =
2982             container_of((void *)work, me4600_ao_subdevice_t, ao_control_task);
2983         PINFO("<%s: %ld> executed. idx=%d\n", __func__, jiffies,
2984               instance->ao_idx);
2985
2986         status = inl(instance->status_reg);
2987         PDEBUG_REG("status_reg inl(0x%lX+0x%lX)=0x%x\n", instance->reg_base,
2988                    instance->status_reg - instance->reg_base, status);
2989
2990         switch (instance->status) {     // Checking actual mode.
2991
2992                 // Not configured for work.
2993         case ao_status_none:
2994                 break;
2995
2996                 //This are stable modes. No need to do anything. (?)
2997         case ao_status_single_configured:
2998         case ao_status_stream_configured:
2999         case ao_status_stream_fifo_error:
3000         case ao_status_stream_buffer_error:
3001         case ao_status_stream_error:
3002                 PERROR("Shouldn't be running!.\n");
3003                 break;
3004
3005         case ao_status_stream_end:
3006                 if (!instance->fifo) {
3007                         PERROR_CRITICAL
3008                             ("Streaming on single device! This feature is not implemented in this version!\n");
3009                         instance->status = ao_status_stream_error;
3010                         // Signal the end.
3011                         signaling = 1;
3012                         break;
3013                 }
3014         case ao_status_single_end:
3015                 if (status & ME4600_AO_STATUS_BIT_FSM) {        // State machine is working but the status is set to end. Force stop.
3016
3017                         // Wait for stop.
3018                         reschedule = 1;
3019                 }
3020
3021                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3022                 // Stop all actions. No conditions! Block interrupts and trigger. Leave FIFO untouched!
3023                 ctrl = inl(instance->ctrl_reg);
3024                 ctrl |=
3025                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP | ME4600_AO_CTRL_BIT_STOP
3026                     | ME4600_AO_CTRL_BIT_RESET_IRQ;
3027                 ctrl &=
3028                     ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
3029                       ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
3030                 ctrl &=
3031                     ~(ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
3032                       ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH);
3033                 outl(ctrl, instance->ctrl_reg);
3034                 PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
3035                            instance->reg_base,
3036                            instance->ctrl_reg - instance->reg_base, ctrl);
3037                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3038                 break;
3039
3040                 // Single modes
3041         case ao_status_single_run_wait:
3042         case ao_status_single_run:
3043         case ao_status_single_end_wait:
3044
3045                 if (!(status & ME4600_AO_STATUS_BIT_FSM)) {     // State machine is not working.
3046                         if (((instance->fifo)
3047                              && (!(status & ME4600_AO_STATUS_BIT_EF)))
3048                             || (!(instance->fifo))) {   // Single is in end state.
3049                                 PDEBUG("Single call has been complited.\n");
3050
3051                                 // Set correct value for single_read();
3052                                 instance->single_value =
3053                                     instance->single_value_in_fifo;
3054
3055                                 // Set status as 'ao_status_single_end'
3056                                 instance->status = ao_status_single_end;
3057
3058                                 // Signal the end.
3059                                 signaling = 1;
3060                                 // Wait for stop ISM.
3061                                 reschedule = 1;
3062
3063                                 break;
3064                         }
3065                 }
3066                 // Check timeout.
3067                 if ((instance->timeout.delay) && ((jiffies - instance->timeout.start_time) >= instance->timeout.delay)) {       // Timeout
3068                         PDEBUG("Timeout reached.\n");
3069                         // Stop all actions. No conditions! Block interrupts and trigger. Leave FIFO untouched!
3070                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3071                         ctrl = inl(instance->ctrl_reg);
3072                         ctrl |=
3073                             ME4600_AO_CTRL_BIT_STOP |
3074                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP |
3075                             ME4600_AO_CTRL_BIT_RESET_IRQ;
3076                         ctrl &=
3077                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
3078                               ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
3079                         /// Fix for timeout error.
3080                         ctrl &=
3081                             ~(ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
3082                               ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH);
3083                         if (instance->fifo) {   //Disabling FIFO
3084                                 ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_FIFO;
3085                         }
3086                         outl(ctrl, instance->ctrl_reg);
3087                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
3088                                    instance->reg_base,
3089                                    instance->ctrl_reg - instance->reg_base,
3090                                    ctrl);
3091                         spin_unlock_irqrestore(&instance->subdevice_lock,
3092                                                cpu_flags);
3093
3094                         spin_lock(instance->preload_reg_lock);
3095                         //Remove from synchronous start. Block triggering from this output.
3096                         synch = inl(instance->preload_reg);
3097                         synch &=
3098                             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) <<
3099                               instance->ao_idx);
3100                         if (!(instance->fifo)) {        // No FIFO - set to single safe mode
3101                                 synch |=
3102                                     ME4600_AO_SYNC_HOLD << instance->ao_idx;
3103                         }
3104                         outl(synch, instance->preload_reg);
3105                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
3106                                    instance->reg_base,
3107                                    instance->preload_reg - instance->reg_base,
3108                                    synch);
3109                         spin_unlock(instance->preload_reg_lock);
3110
3111                         if (!(instance->fifo)) {        // No FIFO
3112                                 // Restore old settings.
3113                                 PDEBUG("Write old value back to register.\n");
3114                                 outl(instance->single_value,
3115                                      instance->single_reg);
3116                                 PDEBUG_REG
3117                                     ("single_reg outl(0x%lX+0x%lX)=0x%x\n",
3118                                      instance->reg_base,
3119                                      instance->single_reg - instance->reg_base,
3120                                      instance->single_value);
3121                         }
3122                         // Set correct value for single_read();
3123                         instance->single_value_in_fifo = instance->single_value;
3124
3125                         instance->status = ao_status_single_end;
3126
3127                         // Signal the end.
3128                         signaling = 1;
3129                 }
3130                 // Wait for stop.
3131                 reschedule = 1;
3132                 break;
3133
3134                 // Stream modes
3135         case ao_status_stream_run_wait:
3136                 if (!instance->fifo) {
3137                         PERROR_CRITICAL
3138                             ("Streaming on single device! This feature is not implemented in this version!\n");
3139                         instance->status = ao_status_stream_error;
3140                         // Signal the end.
3141                         signaling = 1;
3142                         break;
3143                 }
3144
3145                 if (status & ME4600_AO_STATUS_BIT_FSM) {        // State machine is working. Waiting for start finish.
3146                         instance->status = ao_status_stream_run;
3147
3148                         // Signal end of this step
3149                         signaling = 1;
3150                 } else {        // State machine is not working.
3151                         if (!(status & ME4600_AO_STATUS_BIT_EF)) {      // FIFO is empty. Procedure has started and finish already!
3152                                 instance->status = ao_status_stream_end;
3153
3154                                 // Signal the end.
3155                                 signaling = 1;
3156                                 // Wait for stop.
3157                                 reschedule = 1;
3158                                 break;
3159                         }
3160                 }
3161
3162                 // Check timeout.
3163                 if ((instance->timeout.delay) && ((jiffies - instance->timeout.start_time) >= instance->timeout.delay)) {       // Timeout
3164                         PDEBUG("Timeout reached.\n");
3165                         // Stop all actions. No conditions! Block interrupts. Leave FIFO untouched!
3166                         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3167                         ctrl = inl(instance->ctrl_reg);
3168                         ctrl |=
3169                             ME4600_AO_CTRL_BIT_STOP |
3170                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP |
3171                             ME4600_AO_CTRL_BIT_RESET_IRQ;
3172                         ctrl &=
3173                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
3174                               ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
3175                         outl(ctrl, instance->ctrl_reg);
3176                         PDEBUG_REG("ctrl_reg outl(0x%lX+0x%lX)=0x%x\n",
3177                                    instance->reg_base,
3178                                    instance->ctrl_reg - instance->reg_base,
3179                                    ctrl);
3180                         spin_unlock_irqrestore(&instance->subdevice_lock,
3181                                                cpu_flags);
3182                         spin_lock(instance->preload_reg_lock);
3183                         //Remove from synchronous start. Block triggering from this output.
3184                         synch = inl(instance->preload_reg);
3185                         synch &=
3186                             ~((ME4600_AO_SYNC_HOLD | ME4600_AO_SYNC_EXT_TRIG) <<
3187                               instance->ao_idx);
3188                         outl(synch, instance->preload_reg);
3189                         PDEBUG_REG("preload_reg outl(0x%lX+0x%lX)=0x%x\n",
3190                                    instance->reg_base,
3191                                    instance->preload_reg - instance->reg_base,
3192                                    synch);
3193                         spin_unlock(instance->preload_reg_lock);
3194
3195                         instance->status = ao_status_stream_end;
3196
3197                         // Signal the end.
3198                         signaling = 1;
3199                 }
3200                 // Wait for stop.
3201                 reschedule = 1;
3202                 break;
3203
3204         case ao_status_stream_run:
3205                 if (!instance->fifo) {
3206                         PERROR_CRITICAL
3207                             ("Streaming on single device! This feature is not implemented in this version!\n");
3208                         instance->status = ao_status_stream_error;
3209                         // Signal the end.
3210                         signaling = 1;
3211                         break;
3212                 }
3213
3214                 if (!(status & ME4600_AO_STATUS_BIT_FSM)) {     // State machine is not working. This is an error.
3215                         // BROKEN PIPE!
3216                         if (!(status & ME4600_AO_STATUS_BIT_EF)) {      // FIFO is empty.
3217                                 if (me_circ_buf_values(&instance->circ_buf)) {  // Software buffer is not empty.
3218                                         if (instance->stop_data_count && (instance->stop_data_count <= instance->data_count)) { //Finishing work. Requed data shown.
3219                                                 PDEBUG
3220                                                     ("ISM stoped. No data in FIFO. Buffer is not empty.\n");
3221                                                 instance->status =
3222                                                     ao_status_stream_end;
3223                                         } else {
3224                                                 PERROR
3225                                                     ("Output stream has been broken. ISM stoped. No data in FIFO. Buffer is not empty.\n");
3226                                                 instance->status =
3227                                                     ao_status_stream_buffer_error;
3228                                         }
3229                                 } else {        // Software buffer is empty.
3230                                         PDEBUG
3231                                             ("ISM stoped. No data in FIFO. Buffer is empty.\n");
3232                                         instance->status = ao_status_stream_end;
3233                                 }
3234                         } else {        // There are still datas in FIFO.
3235                                 if (me_circ_buf_values(&instance->circ_buf)) {  // Software buffer is not empty.
3236                                         PERROR
3237                                             ("Output stream has been broken. ISM stoped but some data in FIFO and buffer.\n");
3238                                 } else {        // Software buffer is empty.
3239                                         PERROR
3240                                             ("Output stream has been broken. ISM stoped but some data in FIFO. Buffer is empty.\n");
3241                                 }
3242                                 instance->status = ao_status_stream_fifo_error;
3243
3244                         }
3245
3246                         // Signal the failure.
3247                         signaling = 1;
3248                         break;
3249                 }
3250                 // Wait for stop.
3251                 reschedule = 1;
3252                 break;
3253
3254         case ao_status_stream_end_wait:
3255                 if (!instance->fifo) {
3256                         PERROR_CRITICAL
3257                             ("Streaming on single device! This feature is not implemented in this version!\n");
3258                         instance->status = ao_status_stream_error;
3259                         // Signal the end.
3260                         signaling = 1;
3261                         break;
3262                 }
3263
3264                 if (!(status & ME4600_AO_STATUS_BIT_FSM)) {     // State machine is not working. Waiting for stop finish.
3265                         instance->status = ao_status_stream_end;
3266                         signaling = 1;
3267                 }
3268                 // State machine is working.
3269                 reschedule = 1;
3270                 break;
3271
3272         default:
3273                 PERROR_CRITICAL("Status is in wrong state (%d)!\n",
3274                                 instance->status);
3275                 instance->status = ao_status_stream_error;
3276                 // Signal the end.
3277                 signaling = 1;
3278                 break;
3279
3280         }
3281
3282         if (signaling) {        //Signal it.
3283                 wake_up_interruptible_all(&instance->wait_queue);
3284         }
3285
3286         if (instance->ao_control_task_flag && reschedule) {     // Reschedule task
3287                 queue_delayed_work(instance->me4600_workqueue,
3288                                    &instance->ao_control_task, 1);
3289         } else {
3290                 PINFO("<%s> Ending control task.\n", __func__);
3291         }
3292
3293 }
3294 #else
3295 /// @note SPECIAL BUILD FOR BOSCH
3296 /// @author Guenter Gebhardt
3297 static int me4600_ao_io_reset_subdevice(me_subdevice_t *subdevice,
3298                                         struct file *filep, int flags)
3299 {
3300         me4600_ao_subdevice_t *instance;
3301         int err = ME_ERRNO_SUCCESS;
3302         uint32_t tmp;
3303         unsigned long status;
3304
3305         PDEBUG("executed.\n");
3306
3307         instance = (me4600_ao_subdevice_t *) subdevice;
3308
3309         ME_SUBDEVICE_ENTER spin_lock_irqsave(&instance->subdevice_lock, status);
3310         spin_lock(instance->preload_reg_lock);
3311         tmp = inl(instance->preload_reg);
3312         tmp &= ~(0x10001 << instance->ao_idx);
3313         outl(tmp, instance->preload_reg);
3314         *instance->preload_flags &= ~(0x1 << instance->ao_idx);
3315         spin_unlock(instance->preload_reg_lock);
3316
3317         tmp = inl(instance->ctrl_reg);
3318         tmp |= ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3319         outl(tmp, instance->ctrl_reg);
3320
3321         while (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ;
3322
3323         outl(ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP,
3324              instance->ctrl_reg);
3325
3326         outl(0x8000, instance->single_reg);
3327
3328         instance->single_value = 0x8000;
3329         instance->circ_buf.head = 0;
3330         instance->circ_buf.tail = 0;
3331
3332         spin_unlock_irqrestore(&instance->subdevice_lock, status);
3333
3334         ME_SUBDEVICE_EXIT;
3335
3336         return err;
3337 }
3338
3339 static int me4600_ao_io_single_config(me_subdevice_t *subdevice,
3340                                       struct file *filep,
3341                                       int channel,
3342                                       int single_config,
3343                                       int ref,
3344                                       int trig_chan,
3345                                       int trig_type, int trig_edge, int flags)
3346 {
3347         me4600_ao_subdevice_t *instance;
3348         int err = ME_ERRNO_SUCCESS;
3349         uint32_t tmp;
3350         unsigned long cpu_flags;
3351
3352         PDEBUG("executed.\n");
3353
3354         instance = (me4600_ao_subdevice_t *) subdevice;
3355
3356         ME_SUBDEVICE_ENTER
3357             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3358
3359         if (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) {
3360                 PERROR("Subdevice is busy.\n");
3361                 err = ME_ERRNO_SUBDEVICE_BUSY;
3362                 goto ERROR;
3363         }
3364
3365         if (channel == 0) {
3366                 if (single_config == 0) {
3367                         if (ref == ME_REF_AO_GROUND) {
3368                                 if (trig_chan == ME_TRIG_CHAN_DEFAULT) {
3369                                         if (trig_type == ME_TRIG_TYPE_SW) {
3370                                                 tmp = inl(instance->ctrl_reg);
3371                                                 tmp |=
3372                                                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3373                                                 outl(tmp, instance->ctrl_reg);
3374                                                 tmp =
3375                                                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3376                                                 outl(tmp, instance->ctrl_reg);
3377
3378                                                 spin_lock(instance->
3379                                                           preload_reg_lock);
3380                                                 tmp =
3381                                                     inl(instance->preload_reg);
3382                                                 tmp &=
3383                                                     ~(0x10001 << instance->
3384                                                       ao_idx);
3385                                                 outl(tmp,
3386                                                      instance->preload_reg);
3387                                                 *instance->preload_flags &=
3388                                                     ~(0x1 << instance->ao_idx);
3389                                                 spin_unlock(instance->
3390                                                             preload_reg_lock);
3391                                         } else if (trig_type ==
3392                                                    ME_TRIG_TYPE_EXT_DIGITAL) {
3393                                                 if (trig_edge ==
3394                                                     ME_TRIG_EDGE_RISING) {
3395                                                         tmp =
3396                                                             inl(instance->
3397                                                                 ctrl_reg);
3398                                                         tmp |=
3399                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3400                                                         outl(tmp,
3401                                                              instance->
3402                                                              ctrl_reg);
3403                                                         tmp =
3404                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3405                                                             |
3406                                                             ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
3407                                                         outl(tmp,
3408                                                              instance->
3409                                                              ctrl_reg);
3410                                                 } else if (trig_edge ==
3411                                                            ME_TRIG_EDGE_FALLING)
3412                                                 {
3413                                                         tmp =
3414                                                             inl(instance->
3415                                                                 ctrl_reg);
3416                                                         tmp |=
3417                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3418                                                         outl(tmp,
3419                                                              instance->
3420                                                              ctrl_reg);
3421                                                         tmp =
3422                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3423                                                             |
3424                                                             ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG
3425                                                             |
3426                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
3427                                                         outl(tmp,
3428                                                              instance->
3429                                                              ctrl_reg);
3430                                                 } else if (trig_edge ==
3431                                                            ME_TRIG_EDGE_ANY) {
3432                                                         tmp =
3433                                                             inl(instance->
3434                                                                 ctrl_reg);
3435                                                         tmp |=
3436                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3437                                                         outl(tmp,
3438                                                              instance->
3439                                                              ctrl_reg);
3440                                                         tmp =
3441                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3442                                                             |
3443                                                             ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG
3444                                                             |
3445                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE
3446                                                             |
3447                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
3448                                                         outl(tmp,
3449                                                              instance->
3450                                                              ctrl_reg);
3451                                                 } else {
3452                                                         PERROR
3453                                                             ("Invalid trigger edge.\n");
3454                                                         err =
3455                                                             ME_ERRNO_INVALID_TRIG_EDGE;
3456                                                         goto ERROR;
3457                                                 }
3458
3459                                                 spin_lock(instance->
3460                                                           preload_reg_lock);
3461
3462                                                 tmp =
3463                                                     inl(instance->preload_reg);
3464                                                 tmp &=
3465                                                     ~(0x10001 << instance->
3466                                                       ao_idx);
3467                                                 tmp |= 0x1 << instance->ao_idx;
3468                                                 outl(tmp,
3469                                                      instance->preload_reg);
3470                                                 *instance->preload_flags &=
3471                                                     ~(0x1 << instance->ao_idx);
3472                                                 spin_unlock(instance->
3473                                                             preload_reg_lock);
3474                                         } else {
3475                                                 PERROR
3476                                                     ("Invalid trigger type.\n");
3477                                                 err =
3478                                                     ME_ERRNO_INVALID_TRIG_TYPE;
3479                                                 goto ERROR;
3480                                         }
3481                                 } else if (trig_chan ==
3482                                            ME_TRIG_CHAN_SYNCHRONOUS) {
3483                                         if (trig_type == ME_TRIG_TYPE_SW) {
3484                                                 tmp = inl(instance->ctrl_reg);
3485                                                 tmp |=
3486                                                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3487                                                 outl(tmp, instance->ctrl_reg);
3488                                                 tmp =
3489                                                     ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3490                                                 outl(tmp, instance->ctrl_reg);
3491
3492                                                 spin_lock(instance->
3493                                                           preload_reg_lock);
3494                                                 tmp =
3495                                                     inl(instance->preload_reg);
3496                                                 tmp &=
3497                                                     ~(0x10001 << instance->
3498                                                       ao_idx);
3499                                                 tmp |= 0x1 << instance->ao_idx;
3500                                                 outl(tmp,
3501                                                      instance->preload_reg);
3502                                                 *instance->preload_flags |=
3503                                                     0x1 << instance->ao_idx;
3504                                                 spin_unlock(instance->
3505                                                             preload_reg_lock);
3506                                         } else if (trig_type ==
3507                                                    ME_TRIG_TYPE_EXT_DIGITAL) {
3508                                                 if (trig_edge ==
3509                                                     ME_TRIG_EDGE_RISING) {
3510                                                         tmp =
3511                                                             inl(instance->
3512                                                                 ctrl_reg);
3513                                                         tmp |=
3514                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3515                                                         outl(tmp,
3516                                                              instance->
3517                                                              ctrl_reg);
3518                                                         tmp =
3519                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3520                                                         outl(tmp,
3521                                                              instance->
3522                                                              ctrl_reg);
3523                                                 } else if (trig_edge ==
3524                                                            ME_TRIG_EDGE_FALLING)
3525                                                 {
3526                                                         tmp =
3527                                                             inl(instance->
3528                                                                 ctrl_reg);
3529                                                         tmp |=
3530                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3531                                                         outl(tmp,
3532                                                              instance->
3533                                                              ctrl_reg);
3534                                                         tmp =
3535                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3536                                                             |
3537                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
3538                                                         outl(tmp,
3539                                                              instance->
3540                                                              ctrl_reg);
3541                                                 } else if (trig_edge ==
3542                                                            ME_TRIG_EDGE_ANY) {
3543                                                         tmp =
3544                                                             inl(instance->
3545                                                                 ctrl_reg);
3546                                                         tmp |=
3547                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3548                                                         outl(tmp,
3549                                                              instance->
3550                                                              ctrl_reg);
3551                                                         tmp =
3552                                                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP
3553                                                             |
3554                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE
3555                                                             |
3556                                                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
3557                                                         outl(tmp,
3558                                                              instance->
3559                                                              ctrl_reg);
3560                                                 } else {
3561                                                         PERROR
3562                                                             ("Invalid trigger edge.\n");
3563                                                         err =
3564                                                             ME_ERRNO_INVALID_TRIG_EDGE;
3565                                                         goto ERROR;
3566                                                 }
3567
3568                                                 spin_lock(instance->
3569                                                           preload_reg_lock);
3570
3571                                                 tmp =
3572                                                     inl(instance->preload_reg);
3573                                                 tmp |=
3574                                                     0x10001 << instance->ao_idx;
3575                                                 outl(tmp,
3576                                                      instance->preload_reg);
3577                                                 *instance->preload_flags &=
3578                                                     ~(0x1 << instance->ao_idx);
3579                                                 spin_unlock(instance->
3580                                                             preload_reg_lock);
3581                                         } else {
3582                                                 PERROR
3583                                                     ("Invalid trigger type.\n");
3584                                                 err =
3585                                                     ME_ERRNO_INVALID_TRIG_TYPE;
3586                                                 goto ERROR;
3587                                         }
3588                                 } else {
3589                                         PERROR
3590                                             ("Invalid trigger channel specified.\n");
3591                                         err = ME_ERRNO_INVALID_REF;
3592                                         goto ERROR;
3593                                 }
3594                         } else {
3595                                 PERROR("Invalid analog reference specified.\n");
3596                                 err = ME_ERRNO_INVALID_REF;
3597                                 goto ERROR;
3598                         }
3599                 } else {
3600                         PERROR("Invalid single config specified.\n");
3601                         err = ME_ERRNO_INVALID_SINGLE_CONFIG;
3602                         goto ERROR;
3603                 }
3604         } else {
3605                 PERROR("Invalid channel number specified.\n");
3606                 err = ME_ERRNO_INVALID_CHANNEL;
3607                 goto ERROR;
3608         }
3609
3610 ERROR:
3611
3612         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3613
3614         ME_SUBDEVICE_EXIT;
3615
3616         return err;
3617 }
3618
3619 static int me4600_ao_io_single_read(me_subdevice_t *subdevice,
3620                                     struct file *filep,
3621                                     int channel,
3622                                     int *value, int time_out, int flags)
3623 {
3624         me4600_ao_subdevice_t *instance;
3625         int err = ME_ERRNO_SUCCESS;
3626         unsigned long tmp;
3627         unsigned long cpu_flags;
3628
3629         PDEBUG("executed.\n");
3630
3631         instance = (me4600_ao_subdevice_t *) subdevice;
3632
3633         if (channel != 0) {
3634                 PERROR("Invalid channel number specified.\n");
3635                 return ME_ERRNO_INVALID_CHANNEL;
3636         }
3637
3638         ME_SUBDEVICE_ENTER
3639             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3640         tmp = inl(instance->ctrl_reg);
3641
3642         if (tmp & 0x3) {
3643                 PERROR("Not in single mode.\n");
3644                 err = ME_ERRNO_PREVIOUS_CONFIG;
3645         } else {
3646                 *value = instance->single_value;
3647         }
3648
3649         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3650
3651         ME_SUBDEVICE_EXIT;
3652
3653         return err;
3654 }
3655
3656 static int me4600_ao_io_single_write(me_subdevice_t *subdevice,
3657                                      struct file *filep,
3658                                      int channel,
3659                                      int value, int time_out, int flags)
3660 {
3661         me4600_ao_subdevice_t *instance;
3662         int err = ME_ERRNO_SUCCESS;
3663         unsigned long mask = 0;
3664         unsigned long tmp;
3665         unsigned long cpu_flags;
3666         int i;
3667         wait_queue_head_t queue;
3668         unsigned long j;
3669         unsigned long delay = 0;
3670
3671         PDEBUG("executed.\n");
3672
3673         init_waitqueue_head(&queue);
3674
3675         instance = (me4600_ao_subdevice_t *) subdevice;
3676
3677         if (channel != 0) {
3678                 PERROR("Invalid channel number specified.\n");
3679                 return ME_ERRNO_INVALID_CHANNEL;
3680         }
3681
3682         if (time_out < 0) {
3683                 PERROR("Invalid timeout specified.\n");
3684                 return ME_ERRNO_INVALID_TIMEOUT;
3685         }
3686
3687         if (time_out) {
3688                 delay = (time_out * HZ) / 1000;
3689
3690                 if (delay == 0)
3691                         delay = 1;
3692         }
3693
3694         ME_SUBDEVICE_ENTER
3695             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3696
3697         tmp = inl(instance->ctrl_reg);
3698
3699         if (tmp & 0x3) {
3700                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3701                 PERROR("Not in single mode.\n");
3702                 err = ME_ERRNO_PREVIOUS_CONFIG;
3703                 goto ERROR;
3704         }
3705
3706         if (tmp & ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG) {
3707                 outl(value, instance->single_reg);
3708                 instance->single_value = value;
3709                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3710
3711                 if (!(flags & ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) {
3712                         j = jiffies;
3713
3714                         while (inl(instance->status_reg) &
3715                                ME4600_AO_STATUS_BIT_FSM) {
3716                                 interruptible_sleep_on_timeout(&queue, 1);
3717
3718                                 if (signal_pending(current)) {
3719                                         PERROR
3720                                             ("Wait on external trigger interrupted by signal.\n");
3721                                         err = ME_ERRNO_SIGNAL;
3722                                         goto ERROR;
3723                                 }
3724
3725                                 if (delay && ((jiffies - j) > delay)) {
3726                                         PERROR("Timeout reached.\n");
3727                                         err = ME_ERRNO_TIMEOUT;
3728                                         goto ERROR;
3729                                 }
3730                         }
3731                 }
3732         } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx))
3733                    == (0x10001 << instance->ao_idx)) {
3734                 if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {
3735                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
3736                         outl(tmp, instance->ctrl_reg);
3737                         outl(value, instance->single_reg);
3738                         instance->single_value = value;
3739                         spin_unlock_irqrestore(&instance->subdevice_lock,
3740                                                cpu_flags);
3741
3742                         if (!(flags & ME_IO_SINGLE_TYPE_WRITE_NONBLOCKING)) {
3743                                 j = jiffies;
3744
3745                                 while (inl(instance->status_reg) &
3746                                        ME4600_AO_STATUS_BIT_FSM) {
3747                                         interruptible_sleep_on_timeout(&queue,
3748                                                                        1);
3749
3750                                         if (signal_pending(current)) {
3751                                                 PERROR
3752                                                     ("Wait on external trigger interrupted by signal.\n");
3753                                                 err = ME_ERRNO_SIGNAL;
3754                                                 goto ERROR;
3755                                         }
3756
3757                                         if (delay && ((jiffies - j) > delay)) {
3758                                                 PERROR("Timeout reached.\n");
3759                                                 err = ME_ERRNO_TIMEOUT;
3760                                                 goto ERROR;
3761                                         }
3762                                 }
3763                         }
3764                 } else {
3765                         outl(value, instance->single_reg);
3766                         instance->single_value = value;
3767                         spin_unlock_irqrestore(&instance->subdevice_lock,
3768                                                cpu_flags);
3769                 }
3770         } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx))
3771                    == (0x1 << instance->ao_idx)) {
3772                 outl(value, instance->single_reg);
3773                 instance->single_value = value;
3774
3775                 PDEBUG("Synchronous SW, flags = 0x%X.\n", flags);
3776
3777                 if (flags & ME_IO_SINGLE_TYPE_TRIG_SYNCHRONOUS) {
3778                         PDEBUG("Trigger synchronous SW.\n");
3779                         spin_lock(instance->preload_reg_lock);
3780                         tmp = inl(instance->preload_reg);
3781
3782                         for (i = 0; i < ME4600_AO_MAX_SUBDEVICES; i++) {
3783                                 if ((*instance->preload_flags & (0x1 << i))) {
3784                                         if ((tmp & (0x10001 << i)) ==
3785                                             (0x1 << i)) {
3786                                                 mask |= 0x1 << i;
3787                                         }
3788                                 }
3789                         }
3790
3791                         tmp &= ~(mask);
3792
3793                         outl(tmp, instance->preload_reg);
3794                         spin_unlock(instance->preload_reg_lock);
3795                 }
3796
3797                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3798         } else {
3799                 outl(value, instance->single_reg);
3800                 instance->single_value = value;
3801                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
3802         }
3803
3804 ERROR:
3805
3806         ME_SUBDEVICE_EXIT;
3807
3808         return err;
3809 }
3810
3811 static int me4600_ao_io_stream_config(me_subdevice_t *subdevice,
3812                                       struct file *filep,
3813                                       meIOStreamConfig_t *config_list,
3814                                       int count,
3815                                       meIOStreamTrigger_t *trigger,
3816                                       int fifo_irq_threshold, int flags)
3817 {
3818         me4600_ao_subdevice_t *instance;
3819         int err = ME_ERRNO_SUCCESS;
3820         unsigned long ctrl;
3821         unsigned long tmp;
3822         unsigned long cpu_flags;
3823         uint64_t conv_ticks;
3824         unsigned int conv_start_ticks_low = trigger->iConvStartTicksLow;
3825         unsigned int conv_start_ticks_high = trigger->iConvStartTicksHigh;
3826
3827         PDEBUG("executed.\n");
3828
3829         instance = (me4600_ao_subdevice_t *) subdevice;
3830
3831         conv_ticks =
3832             (uint64_t) conv_start_ticks_low +
3833             ((uint64_t) conv_start_ticks_high << 32);
3834
3835         if (!instance->fifo) {
3836                 PERROR("Not a streaming ao.\n");
3837                 return ME_ERRNO_NOT_SUPPORTED;
3838         }
3839
3840         ME_SUBDEVICE_ENTER
3841             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
3842
3843         if ((inl(instance->status_reg)) & ME4600_AO_STATUS_BIT_FSM) {
3844                 PERROR("Subdevice is busy.\n");
3845                 err = ME_ERRNO_SUBDEVICE_BUSY;
3846                 goto ERROR;
3847         }
3848
3849         ctrl = inl(instance->ctrl_reg);
3850         ctrl |= ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3851         outl(ctrl, instance->ctrl_reg);
3852         ctrl = ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
3853         outl(ctrl, instance->ctrl_reg);
3854
3855         if (count != 1) {
3856                 PERROR("Invalid stream configuration list count specified.\n");
3857                 err = ME_ERRNO_INVALID_CONFIG_LIST_COUNT;
3858                 goto ERROR;
3859         }
3860
3861         if (config_list[0].iChannel != 0) {
3862                 PERROR("Invalid channel number specified.\n");
3863                 err = ME_ERRNO_INVALID_CHANNEL;
3864                 goto ERROR;
3865         }
3866
3867         if (config_list[0].iStreamConfig != 0) {
3868                 PERROR("Invalid stream config specified.\n");
3869                 err = ME_ERRNO_INVALID_STREAM_CONFIG;
3870                 goto ERROR;
3871         }
3872
3873         if (config_list[0].iRef != ME_REF_AO_GROUND) {
3874                 PERROR("Invalid analog reference.\n");
3875                 err = ME_ERRNO_INVALID_REF;
3876                 goto ERROR;
3877         }
3878
3879         if ((trigger->iAcqStartTicksLow != 0)
3880             || (trigger->iAcqStartTicksHigh != 0)) {
3881                 PERROR
3882                     ("Invalid acquisition start trigger argument specified.\n");
3883                 err = ME_ERRNO_INVALID_ACQ_START_ARG;
3884                 goto ERROR;
3885         }
3886
3887         switch (trigger->iAcqStartTrigType) {
3888
3889         case ME_TRIG_TYPE_SW:
3890                 break;
3891
3892         case ME_TRIG_TYPE_EXT_DIGITAL:
3893                 ctrl |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
3894
3895                 switch (trigger->iAcqStartTrigEdge) {
3896
3897                 case ME_TRIG_EDGE_RISING:
3898                         break;
3899
3900                 case ME_TRIG_EDGE_FALLING:
3901                         ctrl |= ME4600_AO_CTRL_BIT_EX_TRIG_EDGE;
3902
3903                         break;
3904
3905                 case ME_TRIG_EDGE_ANY:
3906                         ctrl |=
3907                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE |
3908                             ME4600_AO_CTRL_BIT_EX_TRIG_EDGE_BOTH;
3909
3910                         break;
3911
3912                 default:
3913                         PERROR
3914                             ("Invalid acquisition start trigger edge specified.\n");
3915
3916                         err = ME_ERRNO_INVALID_ACQ_START_TRIG_EDGE;
3917
3918                         goto ERROR;
3919
3920                         break;
3921                 }
3922
3923                 break;
3924
3925         default:
3926                 PERROR("Invalid acquisition start trigger type specified.\n");
3927
3928                 err = ME_ERRNO_INVALID_ACQ_START_TRIG_TYPE;
3929
3930                 goto ERROR;
3931
3932                 break;
3933         }
3934
3935         switch (trigger->iScanStartTrigType) {
3936
3937         case ME_TRIG_TYPE_FOLLOW:
3938                 break;
3939
3940         default:
3941                 PERROR("Invalid scan start trigger type specified.\n");
3942
3943                 err = ME_ERRNO_INVALID_SCAN_START_TRIG_TYPE;
3944
3945                 goto ERROR;
3946
3947                 break;
3948         }
3949
3950         switch (trigger->iConvStartTrigType) {
3951
3952         case ME_TRIG_TYPE_TIMER:
3953                 if ((conv_ticks < ME4600_AO_MIN_CHAN_TICKS)
3954                     || (conv_ticks > ME4600_AO_MAX_CHAN_TICKS)) {
3955                         PERROR
3956                             ("Invalid conv start trigger argument specified.\n");
3957                         err = ME_ERRNO_INVALID_CONV_START_ARG;
3958                         goto ERROR;
3959                 }
3960
3961                 break;
3962
3963         default:
3964                 PERROR("Invalid conv start trigger type specified.\n");
3965
3966                 err = ME_ERRNO_INVALID_CONV_START_TRIG_TYPE;
3967
3968                 goto ERROR;
3969
3970                 break;
3971         }
3972
3973         /* Preset to hardware wraparound mode */
3974         instance->flags &= ~(ME4600_AO_FLAGS_SW_WRAP_MODE_MASK);
3975
3976         switch (trigger->iScanStopTrigType) {
3977
3978         case ME_TRIG_TYPE_NONE:
3979                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
3980                         /* Set flags to indicate usage of software mode. */
3981                         instance->flags |= ME4600_AO_FLAGS_SW_WRAP_MODE_INF;
3982                         instance->wrap_count = 0;
3983                         instance->wrap_remaining = 0;
3984                 }
3985
3986                 break;
3987
3988         case ME_TRIG_TYPE_COUNT:
3989                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
3990                         if (trigger->iScanStopCount <= 0) {
3991                                 PERROR("Invalid scan stop count specified.\n");
3992                                 err = ME_ERRNO_INVALID_SCAN_STOP_ARG;
3993                                 goto ERROR;
3994                         }
3995
3996                         /* Set flags to indicate usage of software mode. */
3997                         instance->flags |= ME4600_AO_FLAGS_SW_WRAP_MODE_FIN;
3998                         instance->wrap_count = trigger->iScanStopCount;
3999                         instance->wrap_remaining = trigger->iScanStopCount;
4000                 } else {
4001                         PERROR("Invalid scan stop trigger type specified.\n");
4002                         err = ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
4003                         goto ERROR;
4004                 }
4005
4006                 break;
4007
4008         default:
4009                 PERROR("Invalid scan stop trigger type specified.\n");
4010
4011                 err = ME_ERRNO_INVALID_SCAN_STOP_TRIG_TYPE;
4012
4013                 goto ERROR;
4014
4015                 break;
4016         }
4017
4018         switch (trigger->iAcqStopTrigType) {
4019
4020         case ME_TRIG_TYPE_NONE:
4021                 break;
4022
4023         case ME_TRIG_TYPE_COUNT:
4024                 if (trigger->iScanStopTrigType != ME_TRIG_TYPE_NONE) {
4025                         PERROR("Invalid acq stop trigger type specified.\n");
4026                         err = ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
4027                         goto ERROR;
4028                 }
4029
4030                 if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
4031                         if (trigger->iAcqStopCount <= 0) {
4032                                 PERROR("Invalid acq stop count specified.\n");
4033                                 err = ME_ERRNO_INVALID_ACQ_STOP_ARG;
4034                                 goto ERROR;
4035                         }
4036
4037                         /* Set flags to indicate usage of software mode. */
4038                         instance->flags |= ME4600_AO_FLAGS_SW_WRAP_MODE_FIN;
4039                         instance->wrap_count = trigger->iAcqStopCount;
4040                         instance->wrap_remaining = trigger->iAcqStopCount;
4041                 } else {
4042                         PERROR("Invalid acp stop trigger type specified.\n");
4043                         err = ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
4044                         goto ERROR;
4045                 }
4046
4047                 break;
4048
4049         default:
4050                 PERROR("Invalid acq stop trigger type specified.\n");
4051                 err = ME_ERRNO_INVALID_ACQ_STOP_TRIG_TYPE;
4052                 goto ERROR;
4053                 break;
4054         }
4055
4056         switch (trigger->iAcqStartTrigChan) {
4057
4058         case ME_TRIG_CHAN_DEFAULT:
4059                 spin_lock(instance->preload_reg_lock);
4060                 tmp = inl(instance->preload_reg);
4061                 tmp &= ~(0x10001 << instance->ao_idx);
4062                 outl(tmp, instance->preload_reg);
4063                 spin_unlock(instance->preload_reg_lock);
4064
4065                 break;
4066
4067         case ME_TRIG_CHAN_SYNCHRONOUS:
4068                 if (trigger->iAcqStartTrigType == ME_TRIG_TYPE_SW) {
4069                         spin_lock(instance->preload_reg_lock);
4070                         tmp = inl(instance->preload_reg);
4071                         tmp &= ~(0x10001 << instance->ao_idx);
4072                         outl(tmp, instance->preload_reg);
4073                         tmp |= 0x1 << instance->ao_idx;
4074                         outl(tmp, instance->preload_reg);
4075                         spin_unlock(instance->preload_reg_lock);
4076                 } else {
4077                         ctrl &= ~(ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG);
4078                         spin_lock(instance->preload_reg_lock);
4079                         tmp = inl(instance->preload_reg);
4080                         tmp &= ~(0x10001 << instance->ao_idx);
4081                         outl(tmp, instance->preload_reg);
4082                         tmp |= 0x10000 << instance->ao_idx;
4083                         outl(tmp, instance->preload_reg);
4084                         spin_unlock(instance->preload_reg_lock);
4085                 }
4086
4087                 break;
4088
4089         default:
4090                 PERROR("Invalid acq start trigger channel specified.\n");
4091                 err = ME_ERRNO_INVALID_ACQ_START_TRIG_CHAN;
4092                 goto ERROR;
4093
4094                 break;
4095         }
4096
4097         outl(conv_ticks - 2, instance->timer_reg);
4098
4099         if (flags & ME_IO_STREAM_CONFIG_BIT_PATTERN) {
4100                 if (instance->ao_idx == 3) {
4101                         ctrl |= ME4600_AO_CTRL_BIT_ENABLE_DO;
4102                 } else {
4103                         err = ME_ERRNO_INVALID_FLAGS;
4104                         goto ERROR;
4105                 }
4106         } else {
4107                 if (instance->ao_idx == 3) {
4108                         ctrl &= ~ME4600_AO_CTRL_BIT_ENABLE_DO;
4109                 }
4110         }
4111
4112         /* Set hardware mode. */
4113         if (flags & ME_IO_STREAM_CONFIG_WRAPAROUND) {
4114                 ctrl |= ME4600_AO_CTRL_BIT_MODE_0;
4115         } else {
4116                 ctrl |= ME4600_AO_CTRL_BIT_MODE_1;
4117         }
4118
4119         PDEBUG("Preload word = 0x%X.\n", inl(instance->preload_reg));
4120
4121         PDEBUG("Ctrl word = 0x%lX.\n", ctrl);
4122         outl(ctrl, instance->ctrl_reg); // Write the control word
4123
4124 ERROR:
4125
4126         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4127
4128         ME_SUBDEVICE_EXIT;
4129
4130         return err;
4131 }
4132
4133 static int me4600_ao_io_stream_new_values(me_subdevice_t *subdevice,
4134                                           struct file *filep,
4135                                           int time_out, int *count, int flags)
4136 {
4137         me4600_ao_subdevice_t *instance;
4138         int err = ME_ERRNO_SUCCESS;
4139         long t = 0;
4140         long j;
4141
4142         PDEBUG("executed.\n");
4143
4144         instance = (me4600_ao_subdevice_t *) subdevice;
4145
4146         if (!instance->fifo) {
4147                 PERROR("Not a streaming ao.\n");
4148                 return ME_ERRNO_NOT_SUPPORTED;
4149         }
4150
4151         if (time_out < 0) {
4152                 PERROR("Invalid time_out specified.\n");
4153                 return ME_ERRNO_INVALID_TIMEOUT;
4154         }
4155
4156         if (time_out) {
4157                 t = (time_out * HZ) / 1000;
4158
4159                 if (t == 0)
4160                         t = 1;
4161         }
4162
4163         *count = 0;
4164
4165         ME_SUBDEVICE_ENTER;
4166
4167         if (t) {
4168                 j = jiffies;
4169                 wait_event_interruptible_timeout(instance->wait_queue,
4170                                                  ((me_circ_buf_space
4171                                                    (&instance->circ_buf))
4172                                                   || !(inl(instance->status_reg)
4173                                                        &
4174                                                        ME4600_AO_STATUS_BIT_FSM)),
4175                                                  t);
4176
4177                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
4178                         PERROR("AO subdevice is not running.\n");
4179                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
4180                 } else if (signal_pending(current)) {
4181                         PERROR("Wait on values interrupted from signal.\n");
4182                         err = ME_ERRNO_SIGNAL;
4183                 } else if ((jiffies - j) >= t) {
4184                         PERROR("Wait on values timed out.\n");
4185                         err = ME_ERRNO_TIMEOUT;
4186                 } else {
4187                         *count = me_circ_buf_space(&instance->circ_buf);
4188                 }
4189         } else {
4190                 wait_event_interruptible(instance->wait_queue,
4191                                          ((me_circ_buf_space
4192                                            (&instance->circ_buf))
4193                                           || !(inl(instance->status_reg) &
4194                                                ME4600_AO_STATUS_BIT_FSM)));
4195
4196                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
4197                         PERROR("AO subdevice is not running.\n");
4198                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
4199                 } else if (signal_pending(current)) {
4200                         PERROR("Wait on values interrupted from signal.\n");
4201                         err = ME_ERRNO_SIGNAL;
4202                 } else {
4203                         *count = me_circ_buf_space(&instance->circ_buf);
4204                 }
4205         }
4206
4207         ME_SUBDEVICE_EXIT;
4208
4209         return err;
4210 }
4211
4212 static void stop_immediately(me4600_ao_subdevice_t *instance)
4213 {
4214         unsigned long cpu_flags;
4215         uint32_t tmp;
4216
4217         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4218         tmp = inl(instance->ctrl_reg);
4219         tmp |= ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
4220         outl(tmp, instance->ctrl_reg);
4221
4222         while (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ;
4223
4224         spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4225 }
4226
4227 static int me4600_ao_io_stream_start(me_subdevice_t *subdevice,
4228                                      struct file *filep,
4229                                      int start_mode, int time_out, int flags)
4230 {
4231         me4600_ao_subdevice_t *instance;
4232         int err = ME_ERRNO_SUCCESS;
4233         unsigned long cpu_flags = 0;
4234         unsigned long ref;
4235         unsigned long tmp;
4236         unsigned long delay = 0;
4237         wait_queue_head_t queue;
4238
4239         PDEBUG("executed.\n");
4240
4241         instance = (me4600_ao_subdevice_t *) subdevice;
4242
4243         init_waitqueue_head(&queue);
4244
4245         if (time_out < 0) {
4246                 PERROR("Invalid timeout specified.\n");
4247                 return ME_ERRNO_INVALID_TIMEOUT;
4248         }
4249
4250         if (time_out) {
4251                 delay = (time_out * HZ) / 1000;
4252
4253                 if (delay == 0)
4254                         delay = 1;
4255         }
4256
4257         if (!instance->fifo) {
4258                 PERROR("Not a streaming ao.\n");
4259                 return ME_ERRNO_NOT_SUPPORTED;
4260         }
4261
4262         ME_SUBDEVICE_ENTER
4263             spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4264
4265         tmp = inl(instance->ctrl_reg);
4266
4267         switch (tmp & (ME4600_AO_CTRL_MASK_MODE)) {
4268
4269         case 0:         // Single mode
4270                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4271                 PERROR("Subdevice is configured in single mode.\n");
4272                 err = ME_ERRNO_PREVIOUS_CONFIG;
4273                 goto ERROR;
4274
4275         case 1:         // Wraparound mode
4276                 if (tmp & ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG) {  // Normal wraparound with external trigger
4277
4278                         if ((inl(instance->status_reg) &
4279                              ME4600_AO_STATUS_BIT_FSM)) {
4280                                 spin_unlock_irqrestore(&instance->
4281                                                        subdevice_lock,
4282                                                        cpu_flags);
4283                                 PERROR("Conversion is already running.\n");
4284                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4285                                 goto ERROR;
4286                         }
4287
4288                         tmp &=
4289                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4290                               ME4600_AO_CTRL_BIT_STOP |
4291                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4292
4293                         outl(tmp, instance->ctrl_reg);
4294                         spin_unlock_irqrestore(&instance->subdevice_lock,
4295                                                cpu_flags);
4296
4297                         if (start_mode == ME_START_MODE_BLOCKING) {
4298                                 init_waitqueue_head(&queue);
4299
4300                                 if (delay) {
4301                                         ref = jiffies;
4302
4303                                         while (!
4304                                                (inl(instance->status_reg) &
4305                                                 ME4600_AO_STATUS_BIT_FSM)) {
4306                                                 interruptible_sleep_on_timeout
4307                                                     (&queue, 1);
4308
4309                                                 if (signal_pending(current)) {
4310                                                         PERROR
4311                                                             ("Wait on start of state machine interrupted.\n");
4312                                                         stop_immediately
4313                                                             (instance);
4314                                                         err = ME_ERRNO_SIGNAL;
4315                                                         goto ERROR;
4316                                                 }
4317
4318                                                 if (((jiffies - ref) >= delay)) {
4319                                                         PERROR
4320                                                             ("Timeout reached.\n");
4321                                                         stop_immediately
4322                                                             (instance);
4323                                                         err = ME_ERRNO_TIMEOUT;
4324                                                         goto ERROR;
4325                                                 }
4326                                         }
4327                                 } else {
4328                                         while (!
4329                                                (inl(instance->status_reg) &
4330                                                 ME4600_AO_STATUS_BIT_FSM)) {
4331                                                 interruptible_sleep_on_timeout
4332                                                     (&queue, 1);
4333
4334                                                 if (signal_pending(current)) {
4335                                                         PERROR
4336                                                             ("Wait on start of state machine interrupted.\n");
4337                                                         stop_immediately
4338                                                             (instance);
4339                                                         err = ME_ERRNO_SIGNAL;
4340                                                         goto ERROR;
4341                                                 }
4342                                         }
4343                                 }
4344                         } else if (start_mode == ME_START_MODE_NONBLOCKING) {
4345                         } else {
4346                                 PERROR("Invalid start mode specified.\n");
4347                                 err = ME_ERRNO_INVALID_START_MODE;
4348                                 goto ERROR;
4349                         }
4350                 } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx)) == (0x10000 << instance->ao_idx)) {     // Synchronous with external trigger
4351
4352                         if ((inl(instance->status_reg) &
4353                              ME4600_AO_STATUS_BIT_FSM)) {
4354                                 spin_unlock_irqrestore(&instance->
4355                                                        subdevice_lock,
4356                                                        cpu_flags);
4357                                 PERROR("Conversion is already running.\n");
4358                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4359                                 goto ERROR;
4360                         }
4361
4362                         if (flags & ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
4363                                 tmp |= ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG;
4364                                 tmp &=
4365                                     ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4366                                       ME4600_AO_CTRL_BIT_STOP |
4367                                       ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4368                                 outl(tmp, instance->ctrl_reg);
4369                                 spin_unlock_irqrestore(&instance->
4370                                                        subdevice_lock,
4371                                                        cpu_flags);
4372
4373                                 if (start_mode == ME_START_MODE_BLOCKING) {
4374                                         init_waitqueue_head(&queue);
4375
4376                                         if (delay) {
4377                                                 ref = jiffies;
4378
4379                                                 while (!
4380                                                        (inl
4381                                                         (instance->
4382                                                          status_reg) &
4383                                                         ME4600_AO_STATUS_BIT_FSM))
4384                                                 {
4385                                                         interruptible_sleep_on_timeout
4386                                                             (&queue, 1);
4387
4388                                                         if (signal_pending
4389                                                             (current)) {
4390                                                                 PERROR
4391                                                                     ("Wait on start of state machine interrupted.\n");
4392                                                                 stop_immediately
4393                                                                     (instance);
4394                                                                 err =
4395                                                                     ME_ERRNO_SIGNAL;
4396                                                                 goto ERROR;
4397                                                         }
4398
4399                                                         if (((jiffies - ref) >=
4400                                                              delay)) {
4401                                                                 PERROR
4402                                                                     ("Timeout reached.\n");
4403                                                                 stop_immediately
4404                                                                     (instance);
4405                                                                 err =
4406                                                                     ME_ERRNO_TIMEOUT;
4407                                                                 goto ERROR;
4408                                                         }
4409                                                 }
4410                                         } else {
4411                                                 while (!
4412                                                        (inl
4413                                                         (instance->
4414                                                          status_reg) &
4415                                                         ME4600_AO_STATUS_BIT_FSM))
4416                                                 {
4417                                                         interruptible_sleep_on_timeout
4418                                                             (&queue, 1);
4419
4420                                                         if (signal_pending
4421                                                             (current)) {
4422                                                                 PERROR
4423                                                                     ("Wait on start of state machine interrupted.\n");
4424                                                                 stop_immediately
4425                                                                     (instance);
4426                                                                 err =
4427                                                                     ME_ERRNO_SIGNAL;
4428                                                                 goto ERROR;
4429                                                         }
4430                                                 }
4431                                         }
4432                                 } else if (start_mode ==
4433                                            ME_START_MODE_NONBLOCKING) {
4434                                 } else {
4435                                         PERROR
4436                                             ("Invalid start mode specified.\n");
4437                                         err = ME_ERRNO_INVALID_START_MODE;
4438                                         goto ERROR;
4439                                 }
4440                         } else {
4441                                 tmp &=
4442                                     ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4443                                       ME4600_AO_CTRL_BIT_STOP |
4444                                       ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4445                                 outl(tmp, instance->ctrl_reg);
4446                                 spin_unlock_irqrestore(&instance->
4447                                                        subdevice_lock,
4448                                                        cpu_flags);
4449                         }
4450                 } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx)) == (0x1 << instance->ao_idx)) { // Synchronous wraparound with sw trigger
4451
4452                         if ((inl(instance->status_reg) &
4453                              ME4600_AO_STATUS_BIT_FSM)) {
4454                                 spin_unlock_irqrestore(&instance->
4455                                                        subdevice_lock,
4456                                                        cpu_flags);
4457                                 PERROR("Conversion is already running.\n");
4458                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4459                                 goto ERROR;
4460                         }
4461
4462                         tmp &=
4463                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4464                               ME4600_AO_CTRL_BIT_STOP |
4465                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4466
4467                         outl(tmp, instance->ctrl_reg);
4468
4469                         if (flags & ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
4470                                 outl(0x8000, instance->single_reg);
4471                                 instance->single_value = 0x8000;
4472                         }
4473
4474                         spin_unlock_irqrestore(&instance->subdevice_lock,
4475                                                cpu_flags);
4476                 } else {        // Software start
4477
4478                         if ((inl(instance->status_reg) &
4479                              ME4600_AO_STATUS_BIT_FSM)) {
4480                                 spin_unlock_irqrestore(&instance->
4481                                                        subdevice_lock,
4482                                                        cpu_flags);
4483                                 PERROR("Conversion is already running.\n");
4484                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4485                                 goto ERROR;
4486                         }
4487
4488                         tmp &=
4489                             ~(ME4600_AO_CTRL_BIT_ENABLE_IRQ |
4490                               ME4600_AO_CTRL_BIT_STOP |
4491                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4492
4493                         outl(tmp, instance->ctrl_reg);
4494
4495                         outl(0x8000, instance->single_reg);
4496                         instance->single_value = 0x8000;
4497
4498                         spin_unlock_irqrestore(&instance->subdevice_lock,
4499                                                cpu_flags);
4500                 }
4501
4502                 break;
4503
4504         case 2:         // Continuous mode
4505                 if (tmp & ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG) {  // Externally triggered
4506
4507                         if ((inl(instance->status_reg) &
4508                              ME4600_AO_STATUS_BIT_FSM)) {
4509                                 spin_unlock_irqrestore(&instance->
4510                                                        subdevice_lock,
4511                                                        cpu_flags);
4512                                 PERROR("Conversion is already running.\n");
4513                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4514                                 goto ERROR;
4515                         }
4516
4517                         tmp &=
4518                             ~(ME4600_AO_CTRL_BIT_STOP |
4519                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4520                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4521                         outl(tmp, instance->ctrl_reg);
4522                         instance->wrap_remaining = instance->wrap_count;
4523                         instance->circ_buf.tail = 0;
4524                         spin_unlock_irqrestore(&instance->subdevice_lock,
4525                                                cpu_flags);
4526
4527                         if (start_mode == ME_START_MODE_BLOCKING) {
4528                                 init_waitqueue_head(&queue);
4529
4530                                 if (delay) {
4531                                         ref = jiffies;
4532
4533                                         while (!
4534                                                (inl(instance->status_reg) &
4535                                                 ME4600_AO_STATUS_BIT_FSM)) {
4536                                                 interruptible_sleep_on_timeout
4537                                                     (&queue, 1);
4538
4539                                                 if (signal_pending(current)) {
4540                                                         PERROR
4541                                                             ("Wait on start of state machine interrupted.\n");
4542                                                         stop_immediately
4543                                                             (instance);
4544                                                         err = ME_ERRNO_SIGNAL;
4545                                                         goto ERROR;
4546                                                 }
4547
4548                                                 if (((jiffies - ref) >= delay)) {
4549                                                         PERROR
4550                                                             ("Timeout reached.\n");
4551                                                         stop_immediately
4552                                                             (instance);
4553                                                         err = ME_ERRNO_TIMEOUT;
4554                                                         goto ERROR;
4555                                                 }
4556                                         }
4557                                 } else {
4558                                         while (!
4559                                                (inl(instance->status_reg) &
4560                                                 ME4600_AO_STATUS_BIT_FSM)) {
4561                                                 interruptible_sleep_on_timeout
4562                                                     (&queue, 1);
4563
4564                                                 if (signal_pending(current)) {
4565                                                         PERROR
4566                                                             ("Wait on start of state machine interrupted.\n");
4567                                                         stop_immediately
4568                                                             (instance);
4569                                                         err = ME_ERRNO_SIGNAL;
4570                                                         goto ERROR;
4571                                                 }
4572                                         }
4573                                 }
4574                         } else if (start_mode == ME_START_MODE_NONBLOCKING) {
4575                                 /* Do nothing */
4576                         } else {
4577                                 PERROR("Invalid start mode specified.\n");
4578                                 stop_immediately(instance);
4579                                 err = ME_ERRNO_INVALID_START_MODE;
4580                                 goto ERROR;
4581                         }
4582                 } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx)) == (0x10000 << instance->ao_idx)) {     // Synchronous with external trigger
4583
4584                         if ((inl(instance->status_reg) &
4585                              ME4600_AO_STATUS_BIT_FSM)) {
4586                                 spin_unlock_irqrestore(&instance->
4587                                                        subdevice_lock,
4588                                                        cpu_flags);
4589                                 PERROR("Conversion is already running.\n");
4590                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4591                                 goto ERROR;
4592                         }
4593
4594                         if (flags & ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
4595                                 tmp |=
4596                                     ME4600_AO_CTRL_BIT_ENABLE_EX_TRIG |
4597                                     ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4598                                 tmp &=
4599                                     ~(ME4600_AO_CTRL_BIT_STOP |
4600                                       ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4601                                 outl(tmp, instance->ctrl_reg);
4602                                 instance->wrap_remaining = instance->wrap_count;
4603                                 instance->circ_buf.tail = 0;
4604
4605                                 spin_unlock_irqrestore(&instance->
4606                                                        subdevice_lock,
4607                                                        cpu_flags);
4608
4609                                 if (start_mode == ME_START_MODE_BLOCKING) {
4610                                         init_waitqueue_head(&queue);
4611
4612                                         if (delay) {
4613                                                 ref = jiffies;
4614
4615                                                 while (!
4616                                                        (inl
4617                                                         (instance->
4618                                                          status_reg) &
4619                                                         ME4600_AO_STATUS_BIT_FSM))
4620                                                 {
4621                                                         interruptible_sleep_on_timeout
4622                                                             (&queue, 1);
4623
4624                                                         if (signal_pending
4625                                                             (current)) {
4626                                                                 PERROR
4627                                                                     ("Wait on start of state machine interrupted.\n");
4628                                                                 stop_immediately
4629                                                                     (instance);
4630                                                                 err =
4631                                                                     ME_ERRNO_SIGNAL;
4632                                                                 goto ERROR;
4633                                                         }
4634
4635                                                         if (((jiffies - ref) >=
4636                                                              delay)) {
4637                                                                 PERROR
4638                                                                     ("Timeout reached.\n");
4639                                                                 stop_immediately
4640                                                                     (instance);
4641                                                                 err =
4642                                                                     ME_ERRNO_TIMEOUT;
4643                                                                 goto ERROR;
4644                                                         }
4645                                                 }
4646                                         } else {
4647                                                 while (!
4648                                                        (inl
4649                                                         (instance->
4650                                                          status_reg) &
4651                                                         ME4600_AO_STATUS_BIT_FSM))
4652                                                 {
4653                                                         interruptible_sleep_on_timeout
4654                                                             (&queue, 1);
4655
4656                                                         if (signal_pending
4657                                                             (current)) {
4658                                                                 PERROR
4659                                                                     ("Wait on start of state machine interrupted.\n");
4660                                                                 stop_immediately
4661                                                                     (instance);
4662                                                                 err =
4663                                                                     ME_ERRNO_SIGNAL;
4664                                                                 goto ERROR;
4665                                                         }
4666                                                 }
4667                                         }
4668                                 } else if (start_mode ==
4669                                            ME_START_MODE_NONBLOCKING) {
4670                                 } else {
4671                                         PERROR
4672                                             ("Invalid start mode specified.\n");
4673                                         stop_immediately(instance);
4674                                         err = ME_ERRNO_INVALID_START_MODE;
4675                                         goto ERROR;
4676                                 }
4677                         } else {
4678                                 tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4679                                 tmp &=
4680                                     ~(ME4600_AO_CTRL_BIT_STOP |
4681                                       ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4682                                 outl(tmp, instance->ctrl_reg);
4683                                 instance->wrap_remaining = instance->wrap_count;
4684                                 instance->circ_buf.tail = 0;
4685                                 spin_unlock_irqrestore(&instance->
4686                                                        subdevice_lock,
4687                                                        cpu_flags);
4688                         }
4689                 } else if ((inl(instance->preload_reg) & (0x10001 << instance->ao_idx)) == (0x1 << instance->ao_idx)) { // Synchronous wraparound with sw trigger
4690
4691                         if ((inl(instance->status_reg) &
4692                              ME4600_AO_STATUS_BIT_FSM)) {
4693                                 spin_unlock_irqrestore(&instance->
4694                                                        subdevice_lock,
4695                                                        cpu_flags);
4696                                 PERROR("Conversion is already running.\n");
4697                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4698                                 goto ERROR;
4699                         }
4700
4701                         tmp &=
4702                             ~(ME4600_AO_CTRL_BIT_STOP |
4703                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4704                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4705                         instance->wrap_remaining = instance->wrap_count;
4706                         instance->circ_buf.tail = 0;
4707                         PDEBUG("CTRL Reg = 0x%X.\n", inl(instance->ctrl_reg));
4708                         outl(tmp, instance->ctrl_reg);
4709
4710                         if (flags & ME_IO_STREAM_START_TYPE_TRIG_SYNCHRONOUS) {
4711                                 outl(0x8000, instance->single_reg);
4712                                 instance->single_value = 0x8000;
4713                         }
4714
4715                         spin_unlock_irqrestore(&instance->subdevice_lock,
4716                                                cpu_flags);
4717                 } else {        // Software start
4718
4719                         if ((inl(instance->status_reg) &
4720                              ME4600_AO_STATUS_BIT_FSM)) {
4721                                 spin_unlock_irqrestore(&instance->
4722                                                        subdevice_lock,
4723                                                        cpu_flags);
4724                                 PERROR("Conversion is already running.\n");
4725                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4726                                 goto ERROR;
4727                         }
4728
4729                         tmp &=
4730                             ~(ME4600_AO_CTRL_BIT_STOP |
4731                               ME4600_AO_CTRL_BIT_IMMEDIATE_STOP);
4732
4733                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
4734                         outl(tmp, instance->ctrl_reg);
4735                         outl(0x8000, instance->single_reg);
4736                         instance->single_value = 0x8000;
4737                         instance->wrap_remaining = instance->wrap_count;
4738                         instance->circ_buf.tail = 0;
4739                         spin_unlock_irqrestore(&instance->subdevice_lock,
4740                                                cpu_flags);
4741                 }
4742
4743                 break;
4744
4745         default:
4746                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4747                 PERROR("Invalid mode configured.\n");
4748                 err = ME_ERRNO_INTERNAL;
4749                 goto ERROR;
4750         }
4751
4752 ERROR:
4753
4754         ME_SUBDEVICE_EXIT;
4755
4756         return err;
4757 }
4758
4759 static int me4600_ao_io_stream_status(me_subdevice_t *subdevice,
4760                                       struct file *filep,
4761                                       int wait,
4762                                       int *status, int *values, int flags)
4763 {
4764         me4600_ao_subdevice_t *instance;
4765         int err = ME_ERRNO_SUCCESS;
4766         wait_queue_head_t queue;
4767
4768         PDEBUG("executed.\n");
4769
4770         instance = (me4600_ao_subdevice_t *) subdevice;
4771
4772         init_waitqueue_head(&queue);
4773
4774         if (!instance->fifo) {
4775                 PERROR("Not a streaming ao.\n");
4776                 return ME_ERRNO_NOT_SUPPORTED;
4777         }
4778
4779         ME_SUBDEVICE_ENTER;
4780
4781         if (wait == ME_WAIT_NONE) {
4782                 *status =
4783                     (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ?
4784                     ME_STATUS_BUSY : ME_STATUS_IDLE;
4785                 *values = me_circ_buf_space(&instance->circ_buf);
4786         } else if (wait == ME_WAIT_IDLE) {
4787                 while (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) {
4788                         interruptible_sleep_on_timeout(&queue, 1);
4789
4790                         if (instance->flags & ME4600_AO_FLAGS_BROKEN_PIPE) {
4791                                 PERROR("Output stream was interrupted.\n");
4792                                 *status = ME_STATUS_ERROR;
4793                                 err = ME_ERRNO_SUCCESS;
4794                                 goto ERROR;
4795                         }
4796
4797                         if (signal_pending(current)) {
4798                                 PERROR
4799                                     ("Wait on state machine interrupted by signal.\n");
4800                                 *status = ME_STATUS_INVALID;
4801                                 err = ME_ERRNO_SIGNAL;
4802                                 goto ERROR;
4803                         }
4804                 }
4805
4806                 *status = ME_STATUS_IDLE;
4807
4808                 *values = me_circ_buf_space(&instance->circ_buf);
4809         } else {
4810                 PERROR("Invalid wait argument specified.\n");
4811                 *status = ME_STATUS_INVALID;
4812                 err = ME_ERRNO_INVALID_WAIT;
4813                 goto ERROR;
4814         }
4815
4816 ERROR:
4817
4818         ME_SUBDEVICE_EXIT;
4819
4820         return err;
4821 }
4822
4823 static int me4600_ao_io_stream_stop(me_subdevice_t *subdevice,
4824                                     struct file *filep,
4825                                     int stop_mode, int flags)
4826 {
4827         int err = ME_ERRNO_SUCCESS;
4828         me4600_ao_subdevice_t *instance;
4829         unsigned long cpu_flags;
4830         unsigned long tmp;
4831
4832         PDEBUG("executed.\n");
4833
4834         instance = (me4600_ao_subdevice_t *) subdevice;
4835
4836         if (!instance->fifo) {
4837                 PERROR("Not a streaming ao.\n");
4838                 return ME_ERRNO_NOT_SUPPORTED;
4839         }
4840
4841         ME_SUBDEVICE_ENTER;
4842
4843         if (stop_mode == ME_STOP_MODE_IMMEDIATE) {
4844                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4845                 tmp = inl(instance->ctrl_reg);
4846                 tmp |=
4847                     ME4600_AO_CTRL_BIT_STOP | ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
4848                 outl(tmp, instance->ctrl_reg);
4849
4850                 while (inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM) ;
4851
4852                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4853         } else if (stop_mode == ME_STOP_MODE_LAST_VALUE) {
4854                 spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4855                 tmp = inl(instance->ctrl_reg);
4856                 tmp |= ME4600_AO_CTRL_BIT_STOP;
4857                 outl(tmp, instance->ctrl_reg);
4858                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
4859         } else {
4860                 PERROR("Invalid stop mode specified.\n");
4861                 err = ME_ERRNO_INVALID_STOP_MODE;
4862                 goto ERROR;
4863         }
4864
4865 ERROR:
4866
4867         ME_SUBDEVICE_EXIT;
4868
4869         return err;
4870 }
4871
4872 static int me4600_ao_io_stream_write(me_subdevice_t *subdevice,
4873                                      struct file *filep,
4874                                      int write_mode,
4875                                      int *values, int *count, int flags)
4876 {
4877         int err = ME_ERRNO_SUCCESS;
4878         me4600_ao_subdevice_t *instance;
4879         unsigned long tmp;
4880         int i;
4881         int value;
4882         int cnt = *count;
4883         int c;
4884         int k;
4885         int ret = 0;
4886         unsigned long cpu_flags = 0;
4887
4888         PDEBUG("executed.\n");
4889
4890         instance = (me4600_ao_subdevice_t *) subdevice;
4891
4892         if (!instance->fifo) {
4893                 PERROR("Not a streaming ao.\n");
4894                 return ME_ERRNO_NOT_SUPPORTED;
4895         }
4896
4897         ME_SUBDEVICE_ENTER;
4898
4899         if (*count <= 0) {
4900                 PERROR("Invalid count of values specified.\n");
4901                 err = ME_ERRNO_INVALID_VALUE_COUNT;
4902                 goto ERROR;
4903         }
4904
4905         spin_lock_irqsave(&instance->subdevice_lock, cpu_flags);
4906
4907         tmp = inl(instance->ctrl_reg);
4908
4909         switch (tmp & 0x3) {
4910
4911         case 1:         // Wraparound mode
4912                 if (instance->bosch_fw) {       // Bosch firmware
4913                         spin_unlock_irqrestore(&instance->subdevice_lock,
4914                                                cpu_flags);
4915
4916                         if (cnt != 7) {
4917                                 PERROR
4918                                     ("Invalid count of values specified. 7 expected.\n");
4919                                 err = ME_ERRNO_INVALID_VALUE_COUNT;
4920                                 goto ERROR;
4921                         }
4922
4923                         for (i = 0; i < 7; i++) {
4924                                 if (get_user(value, values)) {
4925                                         PERROR
4926                                             ("Can't copy value from user space.\n");
4927                                         err = ME_ERRNO_INTERNAL;
4928                                         goto ERROR;
4929                                 }
4930
4931                                 if (i == 0) {
4932                                         /* Maximum voltage */
4933                                         value <<= 16;
4934                                         value |=
4935                                             inl(instance->reg_base +
4936                                                 0xD4) & 0xFFFF;
4937                                         outl(value, instance->reg_base + 0xD4);
4938                                 } else if (i == 1) {
4939                                         /* Minimum voltage */
4940                                         value &= 0xFFFF;
4941                                         value |=
4942                                             inl(instance->reg_base +
4943                                                 0xD4) & 0xFFFF0000;
4944                                         outl(value, instance->reg_base + 0xD4);
4945                                 } else if (i == 2) {
4946                                         /* Delta up */
4947                                         value <<= 16;
4948                                         value |=
4949                                             inl(instance->reg_base +
4950                                                 0xD8) & 0xFFFF;
4951                                         outl(value, instance->reg_base + 0xD8);
4952                                 } else if (i == 3) {
4953                                         /* Delta down */
4954                                         value &= 0xFFFF;
4955                                         value |=
4956                                             inl(instance->reg_base +
4957                                                 0xD8) & 0xFFFF0000;
4958                                         outl(value, instance->reg_base + 0xD8);
4959                                 } else if (i == 4) {
4960                                         /* Start value */
4961                                         outl(value, instance->reg_base + 0xDC);
4962                                 } else if (i == 5) {
4963                                         /* Invert */
4964                                         if (value) {
4965                                                 value = inl(instance->ctrl_reg);
4966                                                 value |= 0x100;
4967                                                 outl(value, instance->ctrl_reg);
4968                                         } else {
4969                                                 value = inl(instance->ctrl_reg);
4970                                                 value &= ~0x100;
4971                                                 outl(value, instance->ctrl_reg);
4972                                         }
4973                                 } else if (i == 6) {
4974                                         /* Timer for positive ramp */
4975                                         outl(value, instance->reg_base + 0xE0);
4976                                 }
4977
4978                                 values++;
4979                         }
4980                 } else {        // Normal firmware
4981                         PDEBUG("Write for wraparound mode.\n");
4982
4983                         if (inl(instance->status_reg) &
4984                             ME4600_AO_STATUS_BIT_FSM) {
4985                                 spin_unlock_irqrestore(&instance->
4986                                                        subdevice_lock,
4987                                                        cpu_flags);
4988                                 PERROR
4989                                     ("There is already a conversion running.\n");
4990                                 err = ME_ERRNO_SUBDEVICE_BUSY;
4991                                 goto ERROR;
4992                         }
4993
4994                         tmp |= ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
4995                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_FIFO;
4996                         outl(tmp, instance->ctrl_reg);
4997                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_FIFO;
4998
4999                         if ((*count > ME4600_AO_FIFO_COUNT) ||
5000                             ((instance->
5001                               flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) ==
5002                              ME4600_AO_FLAGS_SW_WRAP_MODE_FIN)) {
5003                                 tmp &=
5004                                     ~(ME4600_AO_CTRL_BIT_MODE_0 |
5005                                       ME4600_AO_CTRL_BIT_MODE_1);
5006                                 tmp |= ME4600_AO_CTRL_BIT_MODE_1;
5007                         }
5008
5009                         outl(tmp, instance->ctrl_reg);
5010                         spin_unlock_irqrestore(&instance->subdevice_lock,
5011                                                cpu_flags);
5012
5013                         if ((*count <= ME4600_AO_FIFO_COUNT) &&
5014                             ((instance->
5015                               flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) ==
5016                              ME4600_AO_FLAGS_SW_WRAP_MODE_INF)) {
5017                                 for (i = 0; i < *count; i++) {
5018                                         if (get_user(value, values + i)) {
5019                                                 PERROR
5020                                                     ("Cannot copy value from user space.\n");
5021                                                 err = ME_ERRNO_INTERNAL;
5022                                                 goto ERROR;
5023                                         }
5024
5025                                         if (instance->ao_idx & 0x1)
5026                                                 value <<= 16;
5027
5028                                         outl(value, instance->fifo_reg);
5029                                 }
5030                         } else if ((*count <= ME4600_AO_CIRC_BUF_COUNT) &&
5031                                    ((instance->
5032                                      flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK)
5033                                     == ME4600_AO_FLAGS_SW_WRAP_MODE_INF)) {
5034                                 for (i = 0; i < *count; i++) {
5035                                         if (get_user(value, values + i)) {
5036                                                 PERROR
5037                                                     ("Cannot copy value from user space.\n");
5038                                                 err = ME_ERRNO_INTERNAL;
5039                                                 goto ERROR;
5040                                         }
5041
5042                                         instance->circ_buf.buf[i] = value;      /* Used to hold the values. */
5043                                 }
5044
5045                                 instance->circ_buf.tail = 0;    /* Used as the current read position. */
5046                                 instance->circ_buf.head = *count;       /* Used as the buffer size. */
5047
5048                                 /* Preload the FIFO. */
5049
5050                                 for (i = 0; i < ME4600_AO_FIFO_COUNT;
5051                                      i++, instance->circ_buf.tail++) {
5052                                         if (instance->circ_buf.tail >=
5053                                             instance->circ_buf.head)
5054                                                 instance->circ_buf.tail = 0;
5055
5056                                         if (instance->ao_idx & 0x1)
5057                                                 outl(instance->circ_buf.
5058                                                      buf[instance->circ_buf.
5059                                                          tail] << 16,
5060                                                      instance->fifo_reg);
5061                                         else
5062                                                 outl(instance->circ_buf.
5063                                                      buf[instance->circ_buf.
5064                                                          tail],
5065                                                      instance->fifo_reg);
5066                                 }
5067                         } else if ((*count <= ME4600_AO_CIRC_BUF_COUNT) &&
5068                                    ((instance->
5069                                      flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK)
5070                                     == ME4600_AO_FLAGS_SW_WRAP_MODE_FIN)) {
5071                                 unsigned int preload_count;
5072
5073                                 for (i = 0; i < *count; i++) {
5074                                         if (get_user(value, values + i)) {
5075                                                 PERROR
5076                                                     ("Cannot copy value from user space.\n");
5077                                                 err = ME_ERRNO_INTERNAL;
5078                                                 goto ERROR;
5079                                         }
5080
5081                                         instance->circ_buf.buf[i] = value;      /* Used to hold the values. */
5082                                 }
5083
5084                                 instance->circ_buf.tail = 0;    /* Used as the current read position. */
5085                                 instance->circ_buf.head = *count;       /* Used as the buffer size. */
5086
5087                                 /* Try to preload the whole FIFO. */
5088                                 preload_count = ME4600_AO_FIFO_COUNT;
5089
5090                                 if (preload_count > instance->wrap_count)
5091                                         preload_count = instance->wrap_count;
5092
5093                                 /* Preload the FIFO. */
5094                                 for (i = 0; i < preload_count;
5095                                      i++, instance->circ_buf.tail++) {
5096                                         if (instance->circ_buf.tail >=
5097                                             instance->circ_buf.head)
5098                                                 instance->circ_buf.tail = 0;
5099
5100                                         if (instance->ao_idx & 0x1)
5101                                                 outl(instance->circ_buf.
5102                                                      buf[instance->circ_buf.
5103                                                          tail] << 16,
5104                                                      instance->fifo_reg);
5105                                         else
5106                                                 outl(instance->circ_buf.
5107                                                      buf[instance->circ_buf.
5108                                                          tail],
5109                                                      instance->fifo_reg);
5110                                 }
5111
5112                                 instance->wrap_remaining =
5113                                     instance->wrap_count - preload_count;
5114                         } else {
5115                                 PERROR("To many values written.\n");
5116                                 err = ME_ERRNO_INVALID_VALUE_COUNT;
5117                                 goto ERROR;
5118                         }
5119                 }
5120
5121                 break;
5122
5123         case 2:         // Continuous mode
5124                 /* Check if in SW wrapround mode */
5125                 if (instance->flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) {
5126                         spin_unlock_irqrestore(&instance->subdevice_lock,
5127                                                cpu_flags);
5128                         PERROR("Subdevice is configured SW wrapround mode.\n");
5129                         err = ME_ERRNO_PREVIOUS_CONFIG;
5130                         goto ERROR;
5131                 }
5132
5133                 switch (write_mode) {
5134
5135                 case ME_WRITE_MODE_BLOCKING:
5136                         spin_unlock_irqrestore(&instance->subdevice_lock,
5137                                                cpu_flags);
5138
5139                         PDEBUG("Write for blocking continuous mode.\n");
5140
5141                         while (cnt > 0) {
5142                                 wait_event_interruptible(instance->wait_queue,
5143                                                          (c =
5144                                                           me_circ_buf_space_to_end
5145                                                           (&instance->
5146                                                            circ_buf)));
5147
5148                                 if (instance->
5149                                     flags & ME4600_AO_FLAGS_BROKEN_PIPE) {
5150                                         PERROR
5151                                             ("Broken pipe in blocking write.\n");
5152                                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
5153                                         goto ERROR;
5154                                 } else if (signal_pending(current)) {
5155                                         PERROR
5156                                             ("Wait for free buffer interrupted from signal.\n");
5157                                         err = ME_ERRNO_SIGNAL;
5158                                         goto ERROR;
5159                                 }
5160
5161                                 PDEBUG("Space to end = %d.\n", c);
5162
5163                                 /* Only able to write size of free buffer or size of count */
5164
5165                                 if (cnt < c)
5166                                         c = cnt;
5167                                 k = sizeof(int) * c;
5168                                 k -= copy_from_user(instance->circ_buf.buf +
5169                                                     instance->circ_buf.head,
5170                                                     values, k);
5171                                 c = k / sizeof(int);
5172
5173                                 PDEBUG("Copy %d values from user space.\n", c);
5174
5175                                 if (!c) {
5176                                         PERROR
5177                                             ("Cannot copy values from user space.\n");
5178                                         err = ME_ERRNO_INTERNAL;
5179                                         goto ERROR;
5180                                 }
5181
5182                                 instance->circ_buf.head =
5183                                     (instance->circ_buf.head +
5184                                      c) & (instance->circ_buf.mask);
5185
5186                                 values += c;
5187                                 cnt -= c;
5188                                 ret += c;
5189
5190                                 /* Values are now available so enable interrupts */
5191                                 spin_lock_irqsave(&instance->subdevice_lock,
5192                                                   cpu_flags);
5193
5194                                 if (me_circ_buf_space(&instance->circ_buf)) {
5195                                         tmp = inl(instance->ctrl_reg);
5196                                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5197                                         outl(tmp, instance->ctrl_reg);
5198                                 }
5199
5200                                 spin_unlock_irqrestore(&instance->
5201                                                        subdevice_lock,
5202                                                        cpu_flags);
5203                         }
5204
5205                         *count = ret;
5206
5207                         break;
5208
5209                 case ME_WRITE_MODE_NONBLOCKING:
5210                         spin_unlock_irqrestore(&instance->subdevice_lock,
5211                                                cpu_flags);
5212
5213                         PDEBUG("Write for non blocking continuous mode.\n");
5214
5215                         while (cnt > 0) {
5216                                 if (instance->
5217                                     flags & ME4600_AO_FLAGS_BROKEN_PIPE) {
5218                                         PERROR
5219                                             ("ME4600:Broken pipe in nonblocking write.\n");
5220                                         err = ME_ERRNO_SUBDEVICE_NOT_RUNNING;
5221                                         goto ERROR;
5222                                 }
5223
5224                                 c = me_circ_buf_space_to_end(&instance->
5225                                                              circ_buf);
5226
5227                                 if (!c) {
5228                                         PDEBUG
5229                                             ("Returning from nonblocking write.\n");
5230                                         break;
5231                                 }
5232
5233                                 PDEBUG("Space to end = %d.\n", c);
5234
5235                                 /* Only able to write size of free buffer or size of count */
5236
5237                                 if (cnt < c)
5238                                         c = cnt;
5239                                 k = sizeof(int) * c;
5240                                 k -= copy_from_user(instance->circ_buf.buf +
5241                                                     instance->circ_buf.head,
5242                                                     values, k);
5243                                 c = k / sizeof(int);
5244
5245                                 PDEBUG("Copy %d values from user space.\n", c);
5246
5247                                 if (!c) {
5248                                         PERROR
5249                                             ("Cannot copy values from user space.\n");
5250                                         err = ME_ERRNO_INTERNAL;
5251                                         goto ERROR;
5252                                 }
5253
5254                                 instance->circ_buf.head =
5255                                     (instance->circ_buf.head +
5256                                      c) & (instance->circ_buf.mask);
5257
5258                                 values += c;
5259                                 cnt -= c;
5260                                 ret += c;
5261
5262                                 /* Values are now available so enable interrupts */
5263                                 spin_lock_irqsave(&instance->subdevice_lock,
5264                                                   cpu_flags);
5265
5266                                 if (me_circ_buf_space(&instance->circ_buf)) {
5267                                         tmp = inl(instance->ctrl_reg);
5268                                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5269                                         outl(tmp, instance->ctrl_reg);
5270                                 }
5271
5272                                 spin_unlock_irqrestore(&instance->
5273                                                        subdevice_lock,
5274                                                        cpu_flags);
5275                         }
5276
5277                         *count = ret;
5278
5279                         break;
5280
5281                 case ME_WRITE_MODE_PRELOAD:
5282                         PDEBUG("Write for preload continuous mode.\n");
5283
5284                         if ((inl(instance->status_reg) &
5285                              ME4600_AO_STATUS_BIT_FSM)) {
5286                                 spin_unlock_irqrestore(&instance->
5287                                                        subdevice_lock,
5288                                                        cpu_flags);
5289                                 PERROR
5290                                     ("Can't Preload DAC FIFO while conversion is running.\n");
5291                                 err = ME_ERRNO_SUBDEVICE_BUSY;
5292                                 goto ERROR;
5293                         }
5294
5295                         tmp = inl(instance->ctrl_reg);
5296
5297                         tmp |=
5298                             ME4600_AO_CTRL_BIT_STOP |
5299                             ME4600_AO_CTRL_BIT_IMMEDIATE_STOP;
5300                         outl(tmp, instance->ctrl_reg);
5301                         tmp &=
5302                             ~(ME4600_AO_CTRL_BIT_ENABLE_FIFO |
5303                               ME4600_AO_CTRL_BIT_ENABLE_IRQ);
5304                         outl(tmp, instance->ctrl_reg);
5305                         tmp |= ME4600_AO_CTRL_BIT_ENABLE_FIFO;
5306                         outl(tmp, instance->ctrl_reg);
5307
5308                         instance->circ_buf.head = 0;
5309                         instance->circ_buf.tail = 0;
5310                         instance->flags &= ~ME4600_AO_FLAGS_BROKEN_PIPE;
5311
5312                         spin_unlock_irqrestore(&instance->subdevice_lock,
5313                                                cpu_flags);
5314
5315                         c = ME4600_AO_FIFO_COUNT;
5316
5317                         if (cnt < c)
5318                                 c = cnt;
5319
5320                         for (i = 0; i < c; i++) {
5321                                 if (get_user(value, values)) {
5322                                         PERROR
5323                                             ("Can't copy value from user space.\n");
5324                                         err = ME_ERRNO_INTERNAL;
5325                                         goto ERROR;
5326                                 }
5327
5328                                 if (instance->ao_idx & 0x1)
5329                                         value <<= 16;
5330
5331                                 outl(value, instance->fifo_reg);
5332
5333                                 values++;
5334                         }
5335
5336                         cnt -= c;
5337
5338                         ret += c;
5339
5340                         PDEBUG("Wrote %d values to fifo.\n", c);
5341
5342                         while (1) {
5343                                 c = me_circ_buf_space_to_end(&instance->
5344                                                              circ_buf);
5345
5346                                 if (c == 0)
5347                                         break;
5348
5349                                 if (cnt < c)
5350                                         c = cnt;
5351
5352                                 if (c <= 0)
5353                                         break;
5354
5355                                 k = sizeof(int) * c;
5356
5357                                 k -= copy_from_user(instance->circ_buf.buf +
5358                                                     instance->circ_buf.head,
5359                                                     values, k);
5360
5361                                 c = k / sizeof(int);
5362
5363                                 PDEBUG("Wrote %d values to circular buffer.\n",
5364                                        c);
5365
5366                                 if (!c) {
5367                                         PERROR
5368                                             ("Can't copy values from user space.\n");
5369                                         err = ME_ERRNO_INTERNAL;
5370                                         goto ERROR;
5371                                 }
5372
5373                                 instance->circ_buf.head =
5374                                     (instance->circ_buf.head +
5375                                      c) & (instance->circ_buf.mask);
5376
5377                                 values += c;
5378                                 cnt -= c;
5379                                 ret += c;
5380                         }
5381
5382                         *count = ret;
5383
5384                         break;
5385
5386                 default:
5387                         spin_unlock_irqrestore(&instance->subdevice_lock,
5388                                                cpu_flags);
5389
5390                         PERROR("Invalid write mode specified.\n");
5391
5392                         err = ME_ERRNO_INVALID_WRITE_MODE;
5393
5394                         goto ERROR;
5395                 }
5396
5397                 break;
5398
5399         default:                // Single mode of invalid
5400                 spin_unlock_irqrestore(&instance->subdevice_lock, cpu_flags);
5401                 PERROR("Subdevice is configured in single mode.\n");
5402                 err = ME_ERRNO_PREVIOUS_CONFIG;
5403                 goto ERROR;
5404         }
5405
5406 ERROR:
5407
5408         ME_SUBDEVICE_EXIT;
5409
5410         return err;
5411 }
5412
5413 static irqreturn_t me4600_ao_isr(int irq, void *dev_id)
5414 {
5415         unsigned long tmp;
5416         int value;
5417         me4600_ao_subdevice_t *instance = dev_id;
5418         int i;
5419         int c = 0;
5420         int c1 = 0;
5421
5422         if (irq != instance->irq) {
5423                 PDEBUG("Incorrect interrupt num: %d.\n", irq);
5424                 return IRQ_NONE;
5425         }
5426
5427         if (!((0x1 << (instance->ao_idx + 3)) & inl(instance->irq_status_reg))) {
5428                 return IRQ_NONE;
5429         }
5430
5431         PDEBUG("executed.\n");
5432
5433         tmp = inl(instance->status_reg);
5434
5435         if (!(tmp & ME4600_AO_STATUS_BIT_EF) &&
5436             (tmp & ME4600_AO_STATUS_BIT_HF) &&
5437             (tmp & ME4600_AO_STATUS_BIT_HF)) {
5438                 c = ME4600_AO_FIFO_COUNT;
5439                 PDEBUG("Fifo empty.\n");
5440         } else if ((tmp & ME4600_AO_STATUS_BIT_EF) &&
5441                    (tmp & ME4600_AO_STATUS_BIT_HF) &&
5442                    (tmp & ME4600_AO_STATUS_BIT_HF)) {
5443                 c = ME4600_AO_FIFO_COUNT / 2;
5444                 PDEBUG("Fifo under half full.\n");
5445         } else {
5446                 c = 0;
5447                 PDEBUG("Fifo full.\n");
5448         }
5449
5450         PDEBUG("Try to write 0x%04X values.\n", c);
5451
5452         if ((instance->flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) ==
5453             ME4600_AO_FLAGS_SW_WRAP_MODE_INF) {
5454                 while (c) {
5455                         c1 = c;
5456
5457                         if (c1 > (instance->circ_buf.head - instance->circ_buf.tail))   /* Only up to the end of the buffer */
5458                                 c1 = (instance->circ_buf.head -
5459                                       instance->circ_buf.tail);
5460
5461                         /* Write the values to the FIFO */
5462                         for (i = 0; i < c1; i++, instance->circ_buf.tail++, c--) {
5463                                 if (instance->ao_idx & 0x1)
5464                                         outl(instance->circ_buf.
5465                                              buf[instance->circ_buf.tail] << 16,
5466                                              instance->fifo_reg);
5467                                 else
5468                                         outl(instance->circ_buf.
5469                                              buf[instance->circ_buf.tail],
5470                                              instance->fifo_reg);
5471                         }
5472
5473                         if (instance->circ_buf.tail >= instance->circ_buf.head) /* Start from beginning */
5474                                 instance->circ_buf.tail = 0;
5475                 }
5476
5477                 spin_lock(&instance->subdevice_lock);
5478
5479                 tmp = inl(instance->ctrl_reg);
5480                 tmp |= ME4600_AO_CTRL_BIT_RESET_IRQ;
5481                 outl(tmp, instance->ctrl_reg);
5482                 tmp &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
5483                 outl(tmp, instance->ctrl_reg);
5484
5485                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
5486                         PERROR("Broken pipe.\n");
5487                         instance->flags |= ME4600_AO_FLAGS_BROKEN_PIPE;
5488                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5489                         outl(tmp, instance->ctrl_reg);
5490                 }
5491
5492                 spin_unlock(&instance->subdevice_lock);
5493         } else if ((instance->flags & ME4600_AO_FLAGS_SW_WRAP_MODE_MASK) ==
5494                    ME4600_AO_FLAGS_SW_WRAP_MODE_FIN) {
5495                 while (c && instance->wrap_remaining) {
5496                         c1 = c;
5497
5498                         if (c1 > (instance->circ_buf.head - instance->circ_buf.tail))   /* Only up to the end of the buffer */
5499                                 c1 = (instance->circ_buf.head -
5500                                       instance->circ_buf.tail);
5501
5502                         if (c1 > instance->wrap_remaining)      /* Only up to count of user defined number of values */
5503                                 c1 = instance->wrap_remaining;
5504
5505                         /* Write the values to the FIFO */
5506                         for (i = 0; i < c1;
5507                              i++, instance->circ_buf.tail++, c--,
5508                              instance->wrap_remaining--) {
5509                                 if (instance->ao_idx & 0x1)
5510                                         outl(instance->circ_buf.
5511                                              buf[instance->circ_buf.tail] << 16,
5512                                              instance->fifo_reg);
5513                                 else
5514                                         outl(instance->circ_buf.
5515                                              buf[instance->circ_buf.tail],
5516                                              instance->fifo_reg);
5517                         }
5518
5519                         if (instance->circ_buf.tail >= instance->circ_buf.head) /* Start from beginning */
5520                                 instance->circ_buf.tail = 0;
5521                 }
5522
5523                 spin_lock(&instance->subdevice_lock);
5524
5525                 tmp = inl(instance->ctrl_reg);
5526
5527                 if (!instance->wrap_remaining) {
5528                         PDEBUG("Finite SW wraparound done.\n");
5529                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5530                 }
5531
5532                 tmp |= ME4600_AO_CTRL_BIT_RESET_IRQ;
5533
5534                 outl(tmp, instance->ctrl_reg);
5535                 tmp &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
5536                 outl(tmp, instance->ctrl_reg);
5537
5538                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
5539                         PERROR("Broken pipe.\n");
5540                         instance->flags |= ME4600_AO_FLAGS_BROKEN_PIPE;
5541                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5542                         outl(tmp, instance->ctrl_reg);
5543                 }
5544
5545                 spin_unlock(&instance->subdevice_lock);
5546
5547         } else {                /* Regular continuous mode */
5548
5549                 while (1) {
5550                         c1 = me_circ_buf_values_to_end(&instance->circ_buf);
5551                         PDEBUG("Values to end = %d.\n", c1);
5552
5553                         if (c1 > c)
5554                                 c1 = c;
5555
5556                         if (c1 <= 0) {
5557                                 PDEBUG("Work done or buffer empty.\n");
5558                                 break;
5559                         }
5560
5561                         if (instance->ao_idx & 0x1) {
5562                                 for (i = 0; i < c1; i++) {
5563                                         value =
5564                                             *(instance->circ_buf.buf +
5565                                               instance->circ_buf.tail +
5566                                               i) << 16;
5567                                         outl(value, instance->fifo_reg);
5568                                 }
5569                         } else
5570                                 outsl(instance->fifo_reg,
5571                                       instance->circ_buf.buf +
5572                                       instance->circ_buf.tail, c1);
5573
5574                         instance->circ_buf.tail =
5575                             (instance->circ_buf.tail +
5576                              c1) & (instance->circ_buf.mask);
5577
5578                         PDEBUG("%d values wrote to port 0x%04X.\n", c1,
5579                                instance->fifo_reg);
5580
5581                         c -= c1;
5582                 }
5583
5584                 spin_lock(&instance->subdevice_lock);
5585
5586                 tmp = inl(instance->ctrl_reg);
5587
5588                 if (!me_circ_buf_values(&instance->circ_buf)) {
5589                         PDEBUG
5590                             ("Disable Interrupt because no values left in buffer.\n");
5591                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5592                 }
5593
5594                 tmp |= ME4600_AO_CTRL_BIT_RESET_IRQ;
5595
5596                 outl(tmp, instance->ctrl_reg);
5597                 tmp &= ~ME4600_AO_CTRL_BIT_RESET_IRQ;
5598                 outl(tmp, instance->ctrl_reg);
5599
5600                 if (!(inl(instance->status_reg) & ME4600_AO_STATUS_BIT_FSM)) {
5601                         PDEBUG("Broken pipe in me4600_ao_isr.\n");
5602                         instance->flags |= ME4600_AO_FLAGS_BROKEN_PIPE;
5603                         tmp &= ~ME4600_AO_CTRL_BIT_ENABLE_IRQ;
5604                         outl(tmp, instance->ctrl_reg);
5605                 }
5606
5607                 spin_unlock(&instance->subdevice_lock);
5608
5609                 wake_up_interruptible(&instance->wait_queue);
5610         }
5611
5612         return IRQ_HANDLED;
5613 }
5614
5615 static void me4600_ao_destructor(struct me_subdevice *subdevice)
5616 {
5617         me4600_ao_subdevice_t *instance;
5618
5619         PDEBUG("executed.\n");
5620
5621         instance = (me4600_ao_subdevice_t *) subdevice;
5622
5623         free_irq(instance->irq, instance);
5624         kfree(instance->circ_buf.buf);
5625         me_subdevice_deinit(&instance->base);
5626         kfree(instance);
5627 }
5628
5629 me4600_ao_subdevice_t *me4600_ao_constructor(uint32_t reg_base,
5630                                              spinlock_t *preload_reg_lock,
5631                                              uint32_t *preload_flags,
5632                                              int ao_idx, int fifo, int irq)
5633 {
5634         me4600_ao_subdevice_t *subdevice;
5635         int err;
5636
5637         PDEBUG("executed.\n");
5638
5639         /* Allocate memory for subdevice instance */
5640         subdevice = kmalloc(sizeof(me4600_ao_subdevice_t), GFP_KERNEL);
5641
5642         if (!subdevice) {
5643                 PERROR("Cannot get memory for subdevice instance.\n");
5644                 return NULL;
5645         }
5646
5647         memset(subdevice, 0, sizeof(me4600_ao_subdevice_t));
5648
5649         /* Initialize subdevice base class */
5650         err = me_subdevice_init(&subdevice->base);
5651
5652         if (err) {
5653                 PERROR("Cannot initialize subdevice base class instance.\n");
5654                 kfree(subdevice);
5655                 return NULL;
5656         }
5657         // Initialize spin locks.
5658         spin_lock_init(&subdevice->subdevice_lock);
5659
5660         subdevice->preload_reg_lock = preload_reg_lock;
5661         subdevice->preload_flags = preload_flags;
5662
5663         /* Allocate and initialize circular buffer */
5664         subdevice->circ_buf.mask = ME4600_AO_CIRC_BUF_COUNT - 1;
5665         subdevice->circ_buf.buf = kmalloc(ME4600_AO_CIRC_BUF_SIZE, GFP_KERNEL);
5666
5667         if (!subdevice->circ_buf.buf) {
5668                 PERROR("Cannot initialize subdevice base class instance.\n");
5669                 me_subdevice_deinit((me_subdevice_t *) subdevice);
5670                 kfree(subdevice);
5671                 return NULL;
5672         }
5673
5674         memset(subdevice->circ_buf.buf, 0, ME4600_AO_CIRC_BUF_SIZE);
5675
5676         subdevice->circ_buf.head = 0;
5677         subdevice->circ_buf.tail = 0;
5678
5679         /* Initialize wait queue */
5680         init_waitqueue_head(&subdevice->wait_queue);
5681
5682         /* Initialize single value to 0V */
5683         subdevice->single_value = 0x8000;
5684
5685         /* Store analog output index */
5686         subdevice->ao_idx = ao_idx;
5687
5688         /* Store if analog output has fifo */
5689         subdevice->fifo = fifo;
5690
5691         /* Initialize registers */
5692
5693         if (ao_idx == 0) {
5694                 subdevice->ctrl_reg = reg_base + ME4600_AO_00_CTRL_REG;
5695                 subdevice->status_reg = reg_base + ME4600_AO_00_STATUS_REG;
5696                 subdevice->fifo_reg = reg_base + ME4600_AO_00_FIFO_REG;
5697                 subdevice->single_reg = reg_base + ME4600_AO_00_SINGLE_REG;
5698                 subdevice->timer_reg = reg_base + ME4600_AO_00_TIMER_REG;
5699                 subdevice->reg_base = reg_base;
5700
5701                 if (inl(subdevice->reg_base + ME4600_AO_BOSCH_REG) == 0x20000) {
5702                         PINFO("Bosch firmware in use for channel 0.\n");
5703                         subdevice->bosch_fw = 1;
5704                 } else {
5705                         subdevice->bosch_fw = 0;
5706                 }
5707         } else if (ao_idx == 1) {
5708                 subdevice->ctrl_reg = reg_base + ME4600_AO_01_CTRL_REG;
5709                 subdevice->status_reg = reg_base + ME4600_AO_01_STATUS_REG;
5710                 subdevice->fifo_reg = reg_base + ME4600_AO_01_FIFO_REG;
5711                 subdevice->single_reg = reg_base + ME4600_AO_01_SINGLE_REG;
5712                 subdevice->timer_reg = reg_base + ME4600_AO_01_TIMER_REG;
5713                 subdevice->reg_base = reg_base;
5714                 subdevice->bosch_fw = 0;
5715         } else if (ao_idx == 2) {
5716                 subdevice->ctrl_reg = reg_base + ME4600_AO_02_CTRL_REG;
5717                 subdevice->status_reg = reg_base + ME4600_AO_02_STATUS_REG;
5718                 subdevice->fifo_reg = reg_base + ME4600_AO_02_FIFO_REG;
5719                 subdevice->single_reg = reg_base + ME4600_AO_02_SINGLE_REG;
5720                 subdevice->timer_reg = reg_base + ME4600_AO_02_TIMER_REG;
5721                 subdevice->reg_base = reg_base;
5722                 subdevice->bosch_fw = 0;
5723         } else {
5724                 subdevice->ctrl_reg = reg_base + ME4600_AO_03_CTRL_REG;
5725                 subdevice->status_reg = reg_base + ME4600_AO_03_STATUS_REG;
5726                 subdevice->fifo_reg = reg_base + ME4600_AO_03_FIFO_REG;
5727                 subdevice->single_reg = reg_base + ME4600_AO_03_SINGLE_REG;
5728                 subdevice->timer_reg = reg_base + ME4600_AO_03_TIMER_REG;
5729                 subdevice->reg_base = reg_base;
5730                 subdevice->bosch_fw = 0;
5731         }
5732
5733         subdevice->irq_status_reg = reg_base + ME4600_IRQ_STATUS_REG;
5734         subdevice->preload_reg = reg_base + ME4600_AO_LOADSETREG_XX;
5735
5736         /* Register interrupt service routine */
5737         subdevice->irq = irq;
5738
5739         if (request_irq
5740             (subdevice->irq, me4600_ao_isr, SA_INTERRUPT | SA_SHIRQ,
5741              ME4600_NAME, subdevice)) {
5742                 PERROR("Cannot get interrupt line.\n");
5743                 me_subdevice_deinit((me_subdevice_t *) subdevice);
5744                 kfree(subdevice->circ_buf.buf);
5745                 kfree(subdevice);
5746                 return NULL;
5747         }
5748
5749         /* Override base class methods. */
5750         subdevice->base.me_subdevice_destructor = me4600_ao_destructor;
5751         subdevice->base.me_subdevice_io_reset_subdevice =
5752             me4600_ao_io_reset_subdevice;
5753         subdevice->base.me_subdevice_io_single_config =
5754             me4600_ao_io_single_config;
5755         subdevice->base.me_subdevice_io_single_read = me4600_ao_io_single_read;
5756         subdevice->base.me_subdevice_io_single_write =
5757             me4600_ao_io_single_write;
5758         subdevice->base.me_subdevice_io_stream_config =
5759             me4600_ao_io_stream_config;
5760         subdevice->base.me_subdevice_io_stream_new_values =
5761             me4600_ao_io_stream_new_values;
5762         subdevice->base.me_subdevice_io_stream_write =
5763             me4600_ao_io_stream_write;
5764         subdevice->base.me_subdevice_io_stream_start =
5765             me4600_ao_io_stream_start;
5766         subdevice->base.me_subdevice_io_stream_status =
5767             me4600_ao_io_stream_status;
5768         subdevice->base.me_subdevice_io_stream_stop = me4600_ao_io_stream_stop;
5769         subdevice->base.me_subdevice_query_number_channels =
5770             me4600_ao_query_number_channels;
5771         subdevice->base.me_subdevice_query_subdevice_type =
5772             me4600_ao_query_subdevice_type;
5773         subdevice->base.me_subdevice_query_subdevice_caps =
5774             me4600_ao_query_subdevice_caps;
5775         subdevice->base.me_subdevice_query_subdevice_caps_args =
5776             me4600_ao_query_subdevice_caps_args;
5777         subdevice->base.me_subdevice_query_range_by_min_max =
5778             me4600_ao_query_range_by_min_max;
5779         subdevice->base.me_subdevice_query_number_ranges =
5780             me4600_ao_query_number_ranges;
5781         subdevice->base.me_subdevice_query_range_info =
5782             me4600_ao_query_range_info;
5783         subdevice->base.me_subdevice_query_timer = me4600_ao_query_timer;
5784
5785         return subdevice;
5786 }
5787
5788 #endif // BOSCH
5789
5790 /* Common functions
5791 */
5792
5793 static int me4600_ao_query_range_by_min_max(me_subdevice_t *subdevice,
5794                                             int unit,
5795                                             int *min,
5796                                             int *max, int *maxdata, int *range)
5797 {
5798         me4600_ao_subdevice_t *instance;
5799
5800         instance = (me4600_ao_subdevice_t *) subdevice;
5801
5802         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5803
5804         if ((*max - *min) < 0) {
5805                 PERROR("Invalid minimum and maximum values specified.\n");
5806                 return ME_ERRNO_INVALID_MIN_MAX;
5807         }
5808
5809         if ((unit == ME_UNIT_VOLT) || (unit == ME_UNIT_ANY)) {
5810                 if ((*max <= (ME4600_AO_MAX_RANGE + 1000))
5811                     && (*min >= ME4600_AO_MIN_RANGE)) {
5812                         *min = ME4600_AO_MIN_RANGE;
5813                         *max = ME4600_AO_MAX_RANGE;
5814                         *maxdata = ME4600_AO_MAX_DATA;
5815                         *range = 0;
5816                 } else {
5817                         PERROR("No matching range available.\n");
5818                         return ME_ERRNO_NO_RANGE;
5819                 }
5820         } else {
5821                 PERROR("Invalid physical unit specified.\n");
5822                 return ME_ERRNO_INVALID_UNIT;
5823         }
5824
5825         return ME_ERRNO_SUCCESS;
5826 }
5827
5828 static int me4600_ao_query_number_ranges(me_subdevice_t *subdevice,
5829                                          int unit, int *count)
5830 {
5831         me4600_ao_subdevice_t *instance;
5832
5833         instance = (me4600_ao_subdevice_t *) subdevice;
5834
5835         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5836
5837         if ((unit == ME_UNIT_VOLT) || (unit == ME_UNIT_ANY)) {
5838                 *count = 1;
5839         } else {
5840                 *count = 0;
5841         }
5842
5843         return ME_ERRNO_SUCCESS;
5844 }
5845
5846 static int me4600_ao_query_range_info(me_subdevice_t *subdevice,
5847                                       int range,
5848                                       int *unit,
5849                                       int *min, int *max, int *maxdata)
5850 {
5851         me4600_ao_subdevice_t *instance;
5852
5853         instance = (me4600_ao_subdevice_t *) subdevice;
5854
5855         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5856
5857         if (range == 0) {
5858                 *unit = ME_UNIT_VOLT;
5859                 *min = ME4600_AO_MIN_RANGE;
5860                 *max = ME4600_AO_MAX_RANGE;
5861                 *maxdata = ME4600_AO_MAX_DATA;
5862         } else {
5863                 PERROR("Invalid range number specified.\n");
5864                 return ME_ERRNO_INVALID_RANGE;
5865         }
5866
5867         return ME_ERRNO_SUCCESS;
5868 }
5869
5870 static int me4600_ao_query_timer(me_subdevice_t *subdevice,
5871                                  int timer,
5872                                  int *base_frequency,
5873                                  long long *min_ticks, long long *max_ticks)
5874 {
5875         me4600_ao_subdevice_t *instance;
5876
5877         instance = (me4600_ao_subdevice_t *) subdevice;
5878
5879         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5880
5881         if ((timer != ME_TIMER_ACQ_START) && (timer != ME_TIMER_CONV_START)) {
5882                 PERROR("Invalid timer specified.\n");
5883                 return ME_ERRNO_INVALID_TIMER;
5884         }
5885
5886         if (instance->fifo) {   //Streaming device.
5887                 *base_frequency = ME4600_AO_BASE_FREQUENCY;
5888                 if (timer == ME_TIMER_ACQ_START) {
5889                         *min_ticks = ME4600_AO_MIN_ACQ_TICKS;
5890                         *max_ticks = ME4600_AO_MAX_ACQ_TICKS;
5891                 } else if (timer == ME_TIMER_CONV_START) {
5892                         *min_ticks = ME4600_AO_MIN_CHAN_TICKS;
5893                         *max_ticks = ME4600_AO_MAX_CHAN_TICKS;
5894                 }
5895         } else {                //Not streaming device!
5896                 *base_frequency = 0;
5897                 *min_ticks = 0;
5898                 *max_ticks = 0;
5899         }
5900
5901         return ME_ERRNO_SUCCESS;
5902 }
5903
5904 static int me4600_ao_query_number_channels(me_subdevice_t *subdevice,
5905                                            int *number)
5906 {
5907         me4600_ao_subdevice_t *instance;
5908         instance = (me4600_ao_subdevice_t *) subdevice;
5909
5910         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5911
5912         *number = 1;
5913
5914         return ME_ERRNO_SUCCESS;
5915 }
5916
5917 static int me4600_ao_query_subdevice_type(me_subdevice_t *subdevice,
5918                                           int *type, int *subtype)
5919 {
5920         me4600_ao_subdevice_t *instance;
5921
5922         instance = (me4600_ao_subdevice_t *) subdevice;
5923
5924         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5925
5926         *type = ME_TYPE_AO;
5927         *subtype = (instance->fifo) ? ME_SUBTYPE_STREAMING : ME_SUBTYPE_SINGLE;
5928
5929         return ME_ERRNO_SUCCESS;
5930 }
5931
5932 static int me4600_ao_query_subdevice_caps(me_subdevice_t *subdevice, int *caps)
5933 {
5934         me4600_ao_subdevice_t *instance;
5935         instance = (me4600_ao_subdevice_t *) subdevice;
5936
5937         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5938
5939         *caps =
5940             ME_CAPS_AO_TRIG_SYNCHRONOUS | ((instance->fifo) ? ME_CAPS_AO_FIFO :
5941                                            ME_CAPS_NONE);
5942
5943         return ME_ERRNO_SUCCESS;
5944 }
5945
5946 static int me4600_ao_query_subdevice_caps_args(struct me_subdevice *subdevice,
5947                                                int cap, int *args, int count)
5948 {
5949         me4600_ao_subdevice_t *instance;
5950         int err = ME_ERRNO_SUCCESS;
5951
5952         instance = (me4600_ao_subdevice_t *) subdevice;
5953
5954         PDEBUG("executed. idx=%d\n", instance->ao_idx);
5955
5956         if (count != 1) {
5957                 PERROR("Invalid capability argument count.\n");
5958                 return ME_ERRNO_INVALID_CAP_ARG_COUNT;
5959         }
5960
5961         switch (cap) {
5962         case ME_CAP_AI_FIFO_SIZE:
5963                 args[0] = (instance->fifo) ? ME4600_AO_FIFO_COUNT : 0;
5964                 break;
5965
5966         case ME_CAP_AI_BUFFER_SIZE:
5967                 args[0] =
5968                     (instance->circ_buf.buf) ? ME4600_AO_CIRC_BUF_COUNT : 0;
5969                 break;
5970
5971         default:
5972                 PERROR("Invalid capability.\n");
5973                 err = ME_ERRNO_INVALID_CAP;
5974                 args[0] = 0;
5975         }
5976
5977         return err;
5978 }