drivers/usb/misc/ftdi-elan.c

   1 /*
   2 * USB FTDI client driver for Elan Digital Systems's Uxxx adapters
   3 *
   4 * Copyright(C) 2006 Elan Digital Systems Limited
   5 * http://www.elandigitalsystems.com
   6 *
   7 * Author and Maintainer - Tony Olech - Elan Digital Systems
   8 * tony.olech@elandigitalsystems.com
   9 *
  10 * This program is free software;you can redistribute it and/or
  11 * modify it under the terms of the GNU General Public License as
  12 * published by the Free Software Foundation, version 2.
  13 *
  14 *
  15 * This driver was written by Tony Olech(tony.olech@elandigitalsystems.com)
  16 * based on various USB client drivers in the 2.6.15 linux kernel
  17 * with constant reference to the 3rd Edition of Linux Device Drivers
  18 * published by O'Reilly
  19 *
  20 * The U132 adapter is a USB to CardBus adapter specifically designed
  21 * for PC cards that contain an OHCI host controller. Typical PC cards
  22 * are the Orange Mobile 3G Option GlobeTrotter Fusion card.
  23 *
  24 * The U132 adapter will *NOT *work with PC cards that do not contain
  25 * an OHCI controller. A simple way to test whether a PC card has an
  26 * OHCI controller as an interface is to insert the PC card directly
  27 * into a laptop(or desktop) with a CardBus slot and if "lspci" shows
  28 * a new USB controller and "lsusb -v" shows a new OHCI Host Controller
  29 * then there is a good chance that the U132 adapter will support the
  30 * PC card.(you also need the specific client driver for the PC card)
  31 *
  32 * Please inform the Author and Maintainer about any PC cards that
  33 * contain OHCI Host Controller and work when directly connected to
  34 * an embedded CardBus slot but do not work when they are connected
  35 * via an ELAN U132 adapter.
  36 *
  37 */
  38 #include <linux/kernel.h>
  39 #include <linux/errno.h>
  40 #include <linux/init.h>
  41 #include <linux/list.h>
  42 #include <linux/ioctl.h>
  43 #include <linux/pci_ids.h>
  44 #include <linux/slab.h>
  45 #include <linux/module.h>
  46 #include <linux/kref.h>
  47 #include <linux/mutex.h>
  48 #include <asm/uaccess.h>
  49 #include <linux/usb.h>
  50 #include <linux/workqueue.h>
  51 #include <linux/platform_device.h>
  52 MODULE_AUTHOR("Tony Olech");
  53 MODULE_DESCRIPTION("FTDI ELAN driver");
  54 MODULE_LICENSE("GPL");
  55 #define INT_MODULE_PARM(n, v) static int n = v;module_param(n, int, 0444)
  56 static int distrust_firmware = 1;
  57 module_param(distrust_firmware, bool, 0);
  58 MODULE_PARM_DESC(distrust_firmware, "true to distrust firmware power/overcurren"
  59         "t setup");
  60 extern struct platform_driver u132_platform_driver;
  61 static struct workqueue_struct *status_queue;
  62 static struct workqueue_struct *command_queue;
  63 static struct workqueue_struct *respond_queue;
  64 /*
  65 * ftdi_module_lock exists to protect access to global variables
  66 *
  67 */
  68 static struct mutex ftdi_module_lock;
  69 static int ftdi_instances = 0;
  70 static struct list_head ftdi_static_list;
  71 /*
  72 * end of the global variables protected by ftdi_module_lock
  73 */
  74 #include "usb_u132.h"
  75 #include <asm/io.h>
  76 #include <linux/usb/hcd.h>
  77
  78         /* FIXME ohci.h is ONLY for internal use by the OHCI driver.
  79          * If you're going to try stuff like this, you need to split
  80          * out shareable stuff (register declarations?) into its own
  81          * file, maybe name <linux/usb/ohci.h>
  82          */
  83
  84 #include "../host/ohci.h"
  85 /* Define these values to match your devices*/
  86 #define USB_FTDI_ELAN_VENDOR_ID 0x0403
  87 #define USB_FTDI_ELAN_PRODUCT_ID 0xd6ea
  88 /* table of devices that work with this driver*/
  89 static const struct usb_device_id ftdi_elan_table[] = {
  90         {USB_DEVICE(USB_FTDI_ELAN_VENDOR_ID, USB_FTDI_ELAN_PRODUCT_ID)},
  91         { /* Terminating entry */ }
  92 };
  93
  94 MODULE_DEVICE_TABLE(usb, ftdi_elan_table);
  95 /* only the jtag(firmware upgrade device) interface requires
  96 * a device file and corresponding minor number, but the
  97 * interface is created unconditionally - I suppose it could
  98 * be configured or not according to a module parameter.
  99 * But since we(now) require one interface per device,
 100 * and since it unlikely that a normal installation would
 101 * require more than a couple of elan-ftdi devices, 8 seems
 102 * like a reasonable limit to have here, and if someone
 103 * really requires more than 8 devices, then they can frig the
 104 * code and recompile
 105 */
 106 #define USB_FTDI_ELAN_MINOR_BASE 192
 107 #define COMMAND_BITS 5
 108 #define COMMAND_SIZE (1<<COMMAND_BITS)
 109 #define COMMAND_MASK (COMMAND_SIZE-1)
 110 struct u132_command {
 111         u8 header;
 112         u16 length;
 113         u8 address;
 114         u8 width;
 115         u32 value;
 116         int follows;
 117         void *buffer;
 118 };
 119 #define RESPOND_BITS 5
 120 #define RESPOND_SIZE (1<<RESPOND_BITS)
 121 #define RESPOND_MASK (RESPOND_SIZE-1)
 122 struct u132_respond {
 123         u8 header;
 124         u8 address;
 125         u32 *value;
 126         int *result;
 127         struct completion wait_completion;
 128 };
 129 struct u132_target {
 130         void *endp;
 131         struct urb *urb;
 132         int toggle_bits;
 133         int error_count;
 134         int condition_code;
 135         int repeat_number;
 136         int halted;
 137         int skipped;
 138         int actual;
 139         int non_null;
 140         int active;
 141         int abandoning;
 142         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
 143                 int toggle_bits, int error_count, int condition_code,
 144                 int repeat_number, int halted, int skipped, int actual,
 145                 int non_null);
 146 };
 147 /* Structure to hold all of our device specific stuff*/
 148 struct usb_ftdi {
 149         struct list_head ftdi_list;
 150         struct mutex u132_lock;
 151         int command_next;
 152         int command_head;
 153         struct u132_command command[COMMAND_SIZE];
 154         int respond_next;
 155         int respond_head;
 156         struct u132_respond respond[RESPOND_SIZE];
 157         struct u132_target target[4];
 158         char device_name[16];
 159         unsigned synchronized:1;
 160         unsigned enumerated:1;
 161         unsigned registered:1;
 162         unsigned initialized:1;
 163         unsigned card_ejected:1;
 164         int function;
 165         int sequence_num;
 166         int disconnected;
 167         int gone_away;
 168         int stuck_status;
 169         int status_queue_delay;
 170         struct semaphore sw_lock;
 171         struct usb_device *udev;
 172         struct usb_interface *interface;
 173         struct usb_class_driver *class;
 174         struct delayed_work status_work;
 175         struct delayed_work command_work;
 176         struct delayed_work respond_work;
 177         struct u132_platform_data platform_data;
 178         struct resource resources[0];
 179         struct platform_device platform_dev;
 180         unsigned char *bulk_in_buffer;
 181         size_t bulk_in_size;
 182         size_t bulk_in_last;
 183         size_t bulk_in_left;
 184         __u8 bulk_in_endpointAddr;
 185         __u8 bulk_out_endpointAddr;
 186         struct kref kref;
 187         u32 controlreg;
 188         u8 response[4 + 1024];
 189         int expected;
 190         int recieved;
 191         int ed_found;
 192 };
 193 #define kref_to_usb_ftdi(d) container_of(d, struct usb_ftdi, kref)
 194 #define platform_device_to_usb_ftdi(d) container_of(d, struct usb_ftdi, \
 195         platform_dev)
 196 static struct usb_driver ftdi_elan_driver;
 197 static void ftdi_elan_delete(struct kref *kref)
 198 {
 199         struct usb_ftdi *ftdi = kref_to_usb_ftdi(kref);
 200         dev_warn(&ftdi->udev->dev, "FREEING ftdi=%p\n", ftdi);
 201         usb_put_dev(ftdi->udev);
 202         ftdi->disconnected += 1;
 203         mutex_lock(&ftdi_module_lock);
 204         list_del_init(&ftdi->ftdi_list);
 205         ftdi_instances -= 1;
 206         mutex_unlock(&ftdi_module_lock);
 207         kfree(ftdi->bulk_in_buffer);
 208         ftdi->bulk_in_buffer = NULL;
 209 }
 210
 211 static void ftdi_elan_put_kref(struct usb_ftdi *ftdi)
 212 {
 213         kref_put(&ftdi->kref, ftdi_elan_delete);
 214 }
 215
 216 static void ftdi_elan_get_kref(struct usb_ftdi *ftdi)
 217 {
 218         kref_get(&ftdi->kref);
 219 }
 220
 221 static void ftdi_elan_init_kref(struct usb_ftdi *ftdi)
 222 {
 223         kref_init(&ftdi->kref);
 224 }
 225
 226 static void ftdi_status_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 227 {
 228         if (!queue_delayed_work(status_queue, &ftdi->status_work, delta))
 229                 kref_put(&ftdi->kref, ftdi_elan_delete);
 230 }
 231
 232 static void ftdi_status_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 233 {
 234         if (queue_delayed_work(status_queue, &ftdi->status_work, delta))
 235                 kref_get(&ftdi->kref);
 236 }
 237
 238 static void ftdi_status_cancel_work(struct usb_ftdi *ftdi)
 239 {
 240         if (cancel_delayed_work(&ftdi->status_work))
 241                 kref_put(&ftdi->kref, ftdi_elan_delete);
 242 }
 243
 244 static void ftdi_command_requeue_work(struct usb_ftdi *ftdi, unsigned int delta)
 245 {
 246         if (!queue_delayed_work(command_queue, &ftdi->command_work, delta))
 247                 kref_put(&ftdi->kref, ftdi_elan_delete);
 248 }
 249
 250 static void ftdi_command_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 251 {
 252         if (queue_delayed_work(command_queue, &ftdi->command_work, delta))
 253                 kref_get(&ftdi->kref);
 254 }
 255
 256 static void ftdi_command_cancel_work(struct usb_ftdi *ftdi)
 257 {
 258         if (cancel_delayed_work(&ftdi->command_work))
 259                 kref_put(&ftdi->kref, ftdi_elan_delete);
 260 }
 261
 262 static void ftdi_response_requeue_work(struct usb_ftdi *ftdi,
 263         unsigned int delta)
 264 {
 265         if (!queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
 266                 kref_put(&ftdi->kref, ftdi_elan_delete);
 267 }
 268
 269 static void ftdi_respond_queue_work(struct usb_ftdi *ftdi, unsigned int delta)
 270 {
 271         if (queue_delayed_work(respond_queue, &ftdi->respond_work, delta))
 272                 kref_get(&ftdi->kref);
 273 }
 274
 275 static void ftdi_response_cancel_work(struct usb_ftdi *ftdi)
 276 {
 277         if (cancel_delayed_work(&ftdi->respond_work))
 278                 kref_put(&ftdi->kref, ftdi_elan_delete);
 279 }
 280
 281 void ftdi_elan_gone_away(struct platform_device *pdev)
 282 {
 283         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
 284         ftdi->gone_away += 1;
 285         ftdi_elan_put_kref(ftdi);
 286 }
 287
 288
 289 EXPORT_SYMBOL_GPL(ftdi_elan_gone_away);
 290 static void ftdi_release_platform_dev(struct device *dev)
 291 {
 292         dev->parent = NULL;
 293 }
 294
 295 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 296         struct u132_target *target, u8 *buffer, int length);
 297 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi);
 298 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi);
 299 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi);
 300 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi);
 301 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi);
 302 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi);
 303 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi);
 304 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi);
 305 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi);
 306 static int ftdi_elan_hcd_init(struct usb_ftdi *ftdi)
 307 {
 308         int result;
 309         if (ftdi->platform_dev.dev.parent)
 310                 return -EBUSY;
 311         ftdi_elan_get_kref(ftdi);
 312         ftdi->platform_data.potpg = 100;
 313         ftdi->platform_data.reset = NULL;
 314         ftdi->platform_dev.id = ftdi->sequence_num;
 315         ftdi->platform_dev.resource = ftdi->resources;
 316         ftdi->platform_dev.num_resources = ARRAY_SIZE(ftdi->resources);
 317         ftdi->platform_dev.dev.platform_data = &ftdi->platform_data;
 318         ftdi->platform_dev.dev.parent = NULL;
 319         ftdi->platform_dev.dev.release = ftdi_release_platform_dev;
 320         ftdi->platform_dev.dev.dma_mask = NULL;
 321         snprintf(ftdi->device_name, sizeof(ftdi->device_name), "u132_hcd");
 322         ftdi->platform_dev.name = ftdi->device_name;
 323         dev_info(&ftdi->udev->dev, "requesting module '%s'\n", "u132_hcd");
 324         request_module("u132_hcd");
 325         dev_info(&ftdi->udev->dev, "registering '%s'\n",
 326                 ftdi->platform_dev.name);
 327         result = platform_device_register(&ftdi->platform_dev);
 328         return result;
 329 }
 330
 331 static void ftdi_elan_abandon_completions(struct usb_ftdi *ftdi)
 332 {
 333         mutex_lock(&ftdi->u132_lock);
 334         while (ftdi->respond_next > ftdi->respond_head) {
 335                 struct u132_respond *respond = &ftdi->respond[RESPOND_MASK &
 336                         ftdi->respond_head++];
 337                 *respond->result = -ESHUTDOWN;
 338                 *respond->value = 0;
 339                 complete(&respond->wait_completion);
 340         } mutex_unlock(&ftdi->u132_lock);
 341 }
 342
 343 static void ftdi_elan_abandon_targets(struct usb_ftdi *ftdi)
 344 {
 345         int ed_number = 4;
 346         mutex_lock(&ftdi->u132_lock);
 347         while (ed_number-- > 0) {
 348                 struct u132_target *target = &ftdi->target[ed_number];
 349                 if (target->active == 1) {
 350                         target->condition_code = TD_DEVNOTRESP;
 351                         mutex_unlock(&ftdi->u132_lock);
 352                         ftdi_elan_do_callback(ftdi, target, NULL, 0);
 353                         mutex_lock(&ftdi->u132_lock);
 354                 }
 355         }
 356         ftdi->recieved = 0;
 357         ftdi->expected = 4;
 358         ftdi->ed_found = 0;
 359         mutex_unlock(&ftdi->u132_lock);
 360 }
 361
 362 static void ftdi_elan_flush_targets(struct usb_ftdi *ftdi)
 363 {
 364         int ed_number = 4;
 365         mutex_lock(&ftdi->u132_lock);
 366         while (ed_number-- > 0) {
 367                 struct u132_target *target = &ftdi->target[ed_number];
 368                 target->abandoning = 1;
 369               wait_1:if (target->active == 1) {
 370                         int command_size = ftdi->command_next -
 371                                 ftdi->command_head;
 372                         if (command_size < COMMAND_SIZE) {
 373                                 struct u132_command *command = &ftdi->command[
 374                                         COMMAND_MASK & ftdi->command_next];
 375                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 376                                 command->length = 0x00;
 377                                 command->address = 0x00;
 378                                 command->width = 0x00;
 379                                 command->follows = 0;
 380                                 command->value = 0;
 381                                 command->buffer = &command->value;
 382                                 ftdi->command_next += 1;
 383                                 ftdi_elan_kick_command_queue(ftdi);
 384                         } else {
 385                                 mutex_unlock(&ftdi->u132_lock);
 386                                 msleep(100);
 387                                 mutex_lock(&ftdi->u132_lock);
 388                                 goto wait_1;
 389                         }
 390                 }
 391               wait_2:if (target->active == 1) {
 392                         int command_size = ftdi->command_next -
 393                                 ftdi->command_head;
 394                         if (command_size < COMMAND_SIZE) {
 395                                 struct u132_command *command = &ftdi->command[
 396                                         COMMAND_MASK & ftdi->command_next];
 397                                 command->header = 0x90 | (ed_number << 5);
 398                                 command->length = 0x00;
 399                                 command->address = 0x00;
 400                                 command->width = 0x00;
 401                                 command->follows = 0;
 402                                 command->value = 0;
 403                                 command->buffer = &command->value;
 404                                 ftdi->command_next += 1;
 405                                 ftdi_elan_kick_command_queue(ftdi);
 406                         } else {
 407                                 mutex_unlock(&ftdi->u132_lock);
 408                                 msleep(100);
 409                                 mutex_lock(&ftdi->u132_lock);
 410                                 goto wait_2;
 411                         }
 412                 }
 413         }
 414         ftdi->recieved = 0;
 415         ftdi->expected = 4;
 416         ftdi->ed_found = 0;
 417         mutex_unlock(&ftdi->u132_lock);
 418 }
 419
 420 static void ftdi_elan_cancel_targets(struct usb_ftdi *ftdi)
 421 {
 422         int ed_number = 4;
 423         mutex_lock(&ftdi->u132_lock);
 424         while (ed_number-- > 0) {
 425                 struct u132_target *target = &ftdi->target[ed_number];
 426                 target->abandoning = 1;
 427               wait:if (target->active == 1) {
 428                         int command_size = ftdi->command_next -
 429                                 ftdi->command_head;
 430                         if (command_size < COMMAND_SIZE) {
 431                                 struct u132_command *command = &ftdi->command[
 432                                         COMMAND_MASK & ftdi->command_next];
 433                                 command->header = 0x80 | (ed_number << 5) | 0x4;
 434                                 command->length = 0x00;
 435                                 command->address = 0x00;
 436                                 command->width = 0x00;
 437                                 command->follows = 0;
 438                                 command->value = 0;
 439                                 command->buffer = &command->value;
 440                                 ftdi->command_next += 1;
 441                                 ftdi_elan_kick_command_queue(ftdi);
 442                         } else {
 443                                 mutex_unlock(&ftdi->u132_lock);
 444                                 msleep(100);
 445                                 mutex_lock(&ftdi->u132_lock);
 446                                 goto wait;
 447                         }
 448                 }
 449         }
 450         ftdi->recieved = 0;
 451         ftdi->expected = 4;
 452         ftdi->ed_found = 0;
 453         mutex_unlock(&ftdi->u132_lock);
 454 }
 455
 456 static void ftdi_elan_kick_command_queue(struct usb_ftdi *ftdi)
 457 {
 458         ftdi_command_queue_work(ftdi, 0);
 459         return;
 460 }
 461
 462 static void ftdi_elan_command_work(struct work_struct *work)
 463 {
 464         struct usb_ftdi *ftdi =
 465                 container_of(work, struct usb_ftdi, command_work.work);
 466
 467         if (ftdi->disconnected > 0) {
 468                 ftdi_elan_put_kref(ftdi);
 469                 return;
 470         } else {
 471                 int retval = ftdi_elan_command_engine(ftdi);
 472                 if (retval == -ESHUTDOWN) {
 473                         ftdi->disconnected += 1;
 474                 } else if (retval == -ENODEV) {
 475                         ftdi->disconnected += 1;
 476                 } else if (retval)
 477                         dev_err(&ftdi->udev->dev, "command error %d\n", retval);
 478                 ftdi_command_requeue_work(ftdi, msecs_to_jiffies(10));
 479                 return;
 480         }
 481 }
 482
 483 static void ftdi_elan_kick_respond_queue(struct usb_ftdi *ftdi)
 484 {
 485         ftdi_respond_queue_work(ftdi, 0);
 486         return;
 487 }
 488
 489 static void ftdi_elan_respond_work(struct work_struct *work)
 490 {
 491         struct usb_ftdi *ftdi =
 492                 container_of(work, struct usb_ftdi, respond_work.work);
 493         if (ftdi->disconnected > 0) {
 494                 ftdi_elan_put_kref(ftdi);
 495                 return;
 496         } else {
 497                 int retval = ftdi_elan_respond_engine(ftdi);
 498                 if (retval == 0) {
 499                 } else if (retval == -ESHUTDOWN) {
 500                         ftdi->disconnected += 1;
 501                 } else if (retval == -ENODEV) {
 502                         ftdi->disconnected += 1;
 503                 } else if (retval == -EILSEQ) {
 504                         ftdi->disconnected += 1;
 505                 } else {
 506                         ftdi->disconnected += 1;
 507                         dev_err(&ftdi->udev->dev, "respond error %d\n", retval);
 508                 }
 509                 if (ftdi->disconnected > 0) {
 510                         ftdi_elan_abandon_completions(ftdi);
 511                         ftdi_elan_abandon_targets(ftdi);
 512                 }
 513                 ftdi_response_requeue_work(ftdi, msecs_to_jiffies(10));
 514                 return;
 515         }
 516 }
 517
 518
 519 /*
 520 * the sw_lock is initially held and will be freed
 521 * after the FTDI has been synchronized
 522 *
 523 */
 524 static void ftdi_elan_status_work(struct work_struct *work)
 525 {
 526         struct usb_ftdi *ftdi =
 527                 container_of(work, struct usb_ftdi, status_work.work);
 528         int work_delay_in_msec = 0;
 529         if (ftdi->disconnected > 0) {
 530                 ftdi_elan_put_kref(ftdi);
 531                 return;
 532         } else if (ftdi->synchronized == 0) {
 533                 down(&ftdi->sw_lock);
 534                 if (ftdi_elan_synchronize(ftdi) == 0) {
 535                         ftdi->synchronized = 1;
 536                         ftdi_command_queue_work(ftdi, 1);
 537                         ftdi_respond_queue_work(ftdi, 1);
 538                         up(&ftdi->sw_lock);
 539                         work_delay_in_msec = 100;
 540                 } else {
 541                         dev_err(&ftdi->udev->dev, "synchronize failed\n");
 542                         up(&ftdi->sw_lock);
 543                         work_delay_in_msec = 10 *1000;
 544                 }
 545         } else if (ftdi->stuck_status > 0) {
 546                 if (ftdi_elan_stuck_waiting(ftdi) == 0) {
 547                         ftdi->stuck_status = 0;
 548                         ftdi->synchronized = 0;
 549                 } else if ((ftdi->stuck_status++ % 60) == 1) {
 550                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
 551                                 "- please remove\n");
 552                 } else
 553                         dev_err(&ftdi->udev->dev, "WRONG type of card inserted "
 554                                 "- checked %d times\n", ftdi->stuck_status);
 555                 work_delay_in_msec = 100;
 556         } else if (ftdi->enumerated == 0) {
 557                 if (ftdi_elan_enumeratePCI(ftdi) == 0) {
 558                         ftdi->enumerated = 1;
 559                         work_delay_in_msec = 250;
 560                 } else
 561                         work_delay_in_msec = 1000;
 562         } else if (ftdi->initialized == 0) {
 563                 if (ftdi_elan_setupOHCI(ftdi) == 0) {
 564                         ftdi->initialized = 1;
 565                         work_delay_in_msec = 500;
 566                 } else {
 567                         dev_err(&ftdi->udev->dev, "initialized failed - trying "
 568                                 "again in 10 seconds\n");
 569                         work_delay_in_msec = 1 *1000;
 570                 }
 571         } else if (ftdi->registered == 0) {
 572                 work_delay_in_msec = 10;
 573                 if (ftdi_elan_hcd_init(ftdi) == 0) {
 574                         ftdi->registered = 1;
 575                 } else
 576                         dev_err(&ftdi->udev->dev, "register failed\n");
 577                 work_delay_in_msec = 250;
 578         } else {
 579                 if (ftdi_elan_checkingPCI(ftdi) == 0) {
 580                         work_delay_in_msec = 250;
 581                 } else if (ftdi->controlreg & 0x00400000) {
 582                         if (ftdi->gone_away > 0) {
 583                                 dev_err(&ftdi->udev->dev, "PCI device eject con"
 584                                         "firmed platform_dev.dev.parent=%p plat"
 585                                         "form_dev.dev=%p\n",
 586                                         ftdi->platform_dev.dev.parent,
 587                                         &ftdi->platform_dev.dev);
 588                                 platform_device_unregister(&ftdi->platform_dev);
 589                                 ftdi->platform_dev.dev.parent = NULL;
 590                                 ftdi->registered = 0;
 591                                 ftdi->enumerated = 0;
 592                                 ftdi->card_ejected = 0;
 593                                 ftdi->initialized = 0;
 594                                 ftdi->gone_away = 0;
 595                         } else
 596                                 ftdi_elan_flush_targets(ftdi);
 597                         work_delay_in_msec = 250;
 598                 } else {
 599                         dev_err(&ftdi->udev->dev, "PCI device has disappeared\n"
 600                                 );
 601                         ftdi_elan_cancel_targets(ftdi);
 602                         work_delay_in_msec = 500;
 603                         ftdi->enumerated = 0;
 604                         ftdi->initialized = 0;
 605                 }
 606         }
 607         if (ftdi->disconnected > 0) {
 608                 ftdi_elan_put_kref(ftdi);
 609                 return;
 610         } else {
 611                 ftdi_status_requeue_work(ftdi,
 612                         msecs_to_jiffies(work_delay_in_msec));
 613                 return;
 614         }
 615 }
 616
 617
 618 /*
 619 * file_operations for the jtag interface
 620 *
 621 * the usage count for the device is incremented on open()
 622 * and decremented on release()
 623 */
 624 static int ftdi_elan_open(struct inode *inode, struct file *file)
 625 {
 626         int subminor;
 627         struct usb_interface *interface;
 628
 629         subminor = iminor(inode);
 630         interface = usb_find_interface(&ftdi_elan_driver, subminor);
 631
 632         if (!interface) {
 633                 printk(KERN_ERR "can't find device for minor %d\n", subminor);
 634                 return -ENODEV;
 635         } else {
 636                 struct usb_ftdi *ftdi = usb_get_intfdata(interface);
 637                 if (!ftdi) {
 638                         return -ENODEV;
 639                 } else {
 640                         if (down_interruptible(&ftdi->sw_lock)) {
 641                                 return -EINTR;
 642                         } else {
 643                                 ftdi_elan_get_kref(ftdi);
 644                                 file->private_data = ftdi;
 645                                 return 0;
 646                         }
 647                 }
 648         }
 649 }
 650
 651 static int ftdi_elan_release(struct inode *inode, struct file *file)
 652 {
 653         struct usb_ftdi *ftdi = file->private_data;
 654         if (ftdi == NULL)
 655                 return -ENODEV;
 656         up(&ftdi->sw_lock);        /* decrement the count on our device */
 657         ftdi_elan_put_kref(ftdi);
 658         return 0;
 659 }
 660
 661
 662 /*
 663 *
 664 * blocking bulk reads are used to get data from the device
 665 *
 666 */
 667 static ssize_t ftdi_elan_read(struct file *file, char __user *buffer,
 668                               size_t count, loff_t *ppos)
 669 {
 670         char data[30 *3 + 4];
 671         char *d = data;
 672         int m = (sizeof(data) - 1) / 3;
 673         int bytes_read = 0;
 674         int retry_on_empty = 10;
 675         int retry_on_timeout = 5;
 676         struct usb_ftdi *ftdi = file->private_data;
 677         if (ftdi->disconnected > 0) {
 678                 return -ENODEV;
 679         }
 680         data[0] = 0;
 681       have:if (ftdi->bulk_in_left > 0) {
 682                 if (count-- > 0) {
 683                         char *p = ++ftdi->bulk_in_last + ftdi->bulk_in_buffer;
 684                         ftdi->bulk_in_left -= 1;
 685                         if (bytes_read < m) {
 686                                 d += sprintf(d, " %02X", 0x000000FF & *p);
 687                         } else if (bytes_read > m) {
 688                         } else
 689                                 d += sprintf(d, " ..");
 690                         if (copy_to_user(buffer++, p, 1)) {
 691                                 return -EFAULT;
 692                         } else {
 693                                 bytes_read += 1;
 694                                 goto have;
 695                         }
 696                 } else
 697                         return bytes_read;
 698         }
 699       more:if (count > 0) {
 700                 int packet_bytes = 0;
 701                 int retval = usb_bulk_msg(ftdi->udev,
 702                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 703                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 704                         &packet_bytes, 50);
 705                 if (packet_bytes > 2) {
 706                         ftdi->bulk_in_left = packet_bytes - 2;
 707                         ftdi->bulk_in_last = 1;
 708                         goto have;
 709                 } else if (retval == -ETIMEDOUT) {
 710                         if (retry_on_timeout-- > 0) {
 711                                 goto more;
 712                         } else if (bytes_read > 0) {
 713                                 return bytes_read;
 714                         } else
 715                                 return retval;
 716                 } else if (retval == 0) {
 717                         if (retry_on_empty-- > 0) {
 718                                 goto more;
 719                         } else
 720                                 return bytes_read;
 721                 } else
 722                         return retval;
 723         } else
 724                 return bytes_read;
 725 }
 726
 727 static void ftdi_elan_write_bulk_callback(struct urb *urb)
 728 {
 729         struct usb_ftdi *ftdi = urb->context;
 730         int status = urb->status;
 731
 732         if (status && !(status == -ENOENT || status == -ECONNRESET ||
 733             status == -ESHUTDOWN)) {
 734                 dev_err(&ftdi->udev->dev, "urb=%p write bulk status received: %"
 735                         "d\n", urb, status);
 736         }
 737         usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 738                 urb->transfer_buffer, urb->transfer_dma);
 739 }
 740
 741 static int fill_buffer_with_all_queued_commands(struct usb_ftdi *ftdi,
 742         char *buf, int command_size, int total_size)
 743 {
 744         int ed_commands = 0;
 745         int b = 0;
 746         int I = command_size;
 747         int i = ftdi->command_head;
 748         while (I-- > 0) {
 749                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 750                         i++];
 751                 int F = command->follows;
 752                 u8 *f = command->buffer;
 753                 if (command->header & 0x80) {
 754                         ed_commands |= 1 << (0x3 & (command->header >> 5));
 755                 }
 756                 buf[b++] = command->header;
 757                 buf[b++] = (command->length >> 0) & 0x00FF;
 758                 buf[b++] = (command->length >> 8) & 0x00FF;
 759                 buf[b++] = command->address;
 760                 buf[b++] = command->width;
 761                 while (F-- > 0) {
 762                         buf[b++] = *f++;
 763                 }
 764         }
 765         return ed_commands;
 766 }
 767
 768 static int ftdi_elan_total_command_size(struct usb_ftdi *ftdi, int command_size)
 769 {
 770         int total_size = 0;
 771         int I = command_size;
 772         int i = ftdi->command_head;
 773         while (I-- > 0) {
 774                 struct u132_command *command = &ftdi->command[COMMAND_MASK &
 775                         i++];
 776                 total_size += 5 + command->follows;
 777         } return total_size;
 778 }
 779
 780 static int ftdi_elan_command_engine(struct usb_ftdi *ftdi)
 781 {
 782         int retval;
 783         char *buf;
 784         int ed_commands;
 785         int total_size;
 786         struct urb *urb;
 787         int command_size = ftdi->command_next - ftdi->command_head;
 788         if (command_size == 0)
 789                 return 0;
 790         total_size = ftdi_elan_total_command_size(ftdi, command_size);
 791         urb = usb_alloc_urb(0, GFP_KERNEL);
 792         if (!urb) {
 793                 dev_err(&ftdi->udev->dev, "could not get a urb to write %d comm"
 794                         "ands totaling %d bytes to the Uxxx\n", command_size,
 795                         total_size);
 796                 return -ENOMEM;
 797         }
 798         buf = usb_alloc_coherent(ftdi->udev, total_size, GFP_KERNEL,
 799                 &urb->transfer_dma);
 800         if (!buf) {
 801                 dev_err(&ftdi->udev->dev, "could not get a buffer to write %d c"
 802                         "ommands totaling %d bytes to the Uxxx\n", command_size,
 803                          total_size);
 804                 usb_free_urb(urb);
 805                 return -ENOMEM;
 806         }
 807         ed_commands = fill_buffer_with_all_queued_commands(ftdi, buf,
 808                 command_size, total_size);
 809         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
 810                 ftdi->bulk_out_endpointAddr), buf, total_size,
 811                 ftdi_elan_write_bulk_callback, ftdi);
 812         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 813         if (ed_commands) {
 814                 char diag[40 *3 + 4];
 815                 char *d = diag;
 816                 int m = total_size;
 817                 u8 *c = buf;
 818                 int s = (sizeof(diag) - 1) / 3;
 819                 diag[0] = 0;
 820                 while (s-- > 0 && m-- > 0) {
 821                         if (s > 0 || m == 0) {
 822                                 d += sprintf(d, " %02X", *c++);
 823                         } else
 824                                 d += sprintf(d, " ..");
 825                 }
 826         }
 827         retval = usb_submit_urb(urb, GFP_KERNEL);
 828         if (retval) {
 829                 dev_err(&ftdi->udev->dev, "failed %d to submit urb %p to write "
 830                         "%d commands totaling %d bytes to the Uxxx\n", retval,
 831                         urb, command_size, total_size);
 832                 usb_free_coherent(ftdi->udev, total_size, buf, urb->transfer_dma);
 833                 usb_free_urb(urb);
 834                 return retval;
 835         }
 836         usb_free_urb(urb);        /* release our reference to this urb,
 837                 the USB core will eventually free it entirely */
 838         ftdi->command_head += command_size;
 839         ftdi_elan_kick_respond_queue(ftdi);
 840         return 0;
 841 }
 842
 843 static void ftdi_elan_do_callback(struct usb_ftdi *ftdi,
 844         struct u132_target *target, u8 *buffer, int length)
 845 {
 846         struct urb *urb = target->urb;
 847         int halted = target->halted;
 848         int skipped = target->skipped;
 849         int actual = target->actual;
 850         int non_null = target->non_null;
 851         int toggle_bits = target->toggle_bits;
 852         int error_count = target->error_count;
 853         int condition_code = target->condition_code;
 854         int repeat_number = target->repeat_number;
 855         void (*callback) (void *, struct urb *, u8 *, int, int, int, int, int,
 856                 int, int, int, int) = target->callback;
 857         target->active -= 1;
 858         target->callback = NULL;
 859         (*callback) (target->endp, urb, buffer, length, toggle_bits,
 860                 error_count, condition_code, repeat_number, halted, skipped,
 861                 actual, non_null);
 862 }
 863
 864 static char *have_ed_set_response(struct usb_ftdi *ftdi,
 865         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 866         char *b)
 867 {
 868         int payload = (ed_length >> 0) & 0x07FF;
 869         mutex_lock(&ftdi->u132_lock);
 870         target->actual = 0;
 871         target->non_null = (ed_length >> 15) & 0x0001;
 872         target->repeat_number = (ed_length >> 11) & 0x000F;
 873         if (ed_type == 0x02) {
 874                 if (payload == 0 || target->abandoning > 0) {
 875                         target->abandoning = 0;
 876                         mutex_unlock(&ftdi->u132_lock);
 877                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 878                                 payload);
 879                         ftdi->recieved = 0;
 880                         ftdi->expected = 4;
 881                         ftdi->ed_found = 0;
 882                         return ftdi->response;
 883                 } else {
 884                         ftdi->expected = 4 + payload;
 885                         ftdi->ed_found = 1;
 886                         mutex_unlock(&ftdi->u132_lock);
 887                         return b;
 888                 }
 889         } else if (ed_type == 0x03) {
 890                 if (payload == 0 || target->abandoning > 0) {
 891                         target->abandoning = 0;
 892                         mutex_unlock(&ftdi->u132_lock);
 893                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 894                                 payload);
 895                         ftdi->recieved = 0;
 896                         ftdi->expected = 4;
 897                         ftdi->ed_found = 0;
 898                         return ftdi->response;
 899                 } else {
 900                         ftdi->expected = 4 + payload;
 901                         ftdi->ed_found = 1;
 902                         mutex_unlock(&ftdi->u132_lock);
 903                         return b;
 904                 }
 905         } else if (ed_type == 0x01) {
 906                 target->abandoning = 0;
 907                 mutex_unlock(&ftdi->u132_lock);
 908                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 909                         payload);
 910                 ftdi->recieved = 0;
 911                 ftdi->expected = 4;
 912                 ftdi->ed_found = 0;
 913                 return ftdi->response;
 914         } else {
 915                 target->abandoning = 0;
 916                 mutex_unlock(&ftdi->u132_lock);
 917                 ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
 918                         payload);
 919                 ftdi->recieved = 0;
 920                 ftdi->expected = 4;
 921                 ftdi->ed_found = 0;
 922                 return ftdi->response;
 923         }
 924 }
 925
 926 static char *have_ed_get_response(struct usb_ftdi *ftdi,
 927         struct u132_target *target, u16 ed_length, int ed_number, int ed_type,
 928         char *b)
 929 {
 930         mutex_lock(&ftdi->u132_lock);
 931         target->condition_code = TD_DEVNOTRESP;
 932         target->actual = (ed_length >> 0) & 0x01FF;
 933         target->non_null = (ed_length >> 15) & 0x0001;
 934         target->repeat_number = (ed_length >> 11) & 0x000F;
 935         mutex_unlock(&ftdi->u132_lock);
 936         if (target->active)
 937                 ftdi_elan_do_callback(ftdi, target, NULL, 0);
 938         target->abandoning = 0;
 939         ftdi->recieved = 0;
 940         ftdi->expected = 4;
 941         ftdi->ed_found = 0;
 942         return ftdi->response;
 943 }
 944
 945
 946 /*
 947 * The engine tries to empty the FTDI fifo
 948 *
 949 * all responses found in the fifo data are dispatched thus
 950 * the response buffer can only ever hold a maximum sized
 951 * response from the Uxxx.
 952 *
 953 */
 954 static int ftdi_elan_respond_engine(struct usb_ftdi *ftdi)
 955 {
 956         u8 *b = ftdi->response + ftdi->recieved;
 957         int bytes_read = 0;
 958         int retry_on_empty = 1;
 959         int retry_on_timeout = 3;
 960         int empty_packets = 0;
 961       read:{
 962                 int packet_bytes = 0;
 963                 int retval = usb_bulk_msg(ftdi->udev,
 964                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
 965                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
 966                         &packet_bytes, 500);
 967                 char diag[30 *3 + 4];
 968                 char *d = diag;
 969                 int m = packet_bytes;
 970                 u8 *c = ftdi->bulk_in_buffer;
 971                 int s = (sizeof(diag) - 1) / 3;
 972                 diag[0] = 0;
 973                 while (s-- > 0 && m-- > 0) {
 974                         if (s > 0 || m == 0) {
 975                                 d += sprintf(d, " %02X", *c++);
 976                         } else
 977                                 d += sprintf(d, " ..");
 978                 }
 979                 if (packet_bytes > 2) {
 980                         ftdi->bulk_in_left = packet_bytes - 2;
 981                         ftdi->bulk_in_last = 1;
 982                         goto have;
 983                 } else if (retval == -ETIMEDOUT) {
 984                         if (retry_on_timeout-- > 0) {
 985                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
 986                                         "t_bytes = %d with total %d bytes%s\n",
 987                                         packet_bytes, bytes_read, diag);
 988                                 goto more;
 989                         } else if (bytes_read > 0) {
 990                                 dev_err(&ftdi->udev->dev, "ONLY %d bytes%s\n",
 991                                         bytes_read, diag);
 992                                 return -ENOMEM;
 993                         } else {
 994                                 dev_err(&ftdi->udev->dev, "TIMED OUT with packe"
 995                                         "t_bytes = %d with total %d bytes%s\n",
 996                                         packet_bytes, bytes_read, diag);
 997                                 return -ENOMEM;
 998                         }
 999                 } else if (retval == -EILSEQ) {
1000                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1001                                 " = %d with total %d bytes%s\n", retval,
1002                                 packet_bytes, bytes_read, diag);
1003                         return retval;
1004                 } else if (retval) {
1005                         dev_err(&ftdi->udev->dev, "error = %d with packet_bytes"
1006                                 " = %d with total %d bytes%s\n", retval,
1007                                 packet_bytes, bytes_read, diag);
1008                         return retval;
1009                 } else if (packet_bytes == 2) {
1010                         unsigned char s0 = ftdi->bulk_in_buffer[0];
1011                         unsigned char s1 = ftdi->bulk_in_buffer[1];
1012                         empty_packets += 1;
1013                         if (s0 == 0x31 && s1 == 0x60) {
1014                                 if (retry_on_empty-- > 0) {
1015                                         goto more;
1016                                 } else
1017                                         return 0;
1018                         } else if (s0 == 0x31 && s1 == 0x00) {
1019                                 if (retry_on_empty-- > 0) {
1020                                         goto more;
1021                                 } else
1022                                         return 0;
1023                         } else {
1024                                 if (retry_on_empty-- > 0) {
1025                                         goto more;
1026                                 } else
1027                                         return 0;
1028                         }
1029                 } else if (packet_bytes == 1) {
1030                         if (retry_on_empty-- > 0) {
1031                                 goto more;
1032                         } else
1033                                 return 0;
1034                 } else {
1035                         if (retry_on_empty-- > 0) {
1036                                 goto more;
1037                         } else
1038                                 return 0;
1039                 }
1040         }
1041       more:{
1042                 goto read;
1043         }
1044       have:if (ftdi->bulk_in_left > 0) {
1045                 u8 c = ftdi->bulk_in_buffer[++ftdi->bulk_in_last];
1046                 bytes_read += 1;
1047                 ftdi->bulk_in_left -= 1;
1048                 if (ftdi->recieved == 0 && c == 0xFF) {
1049                         goto have;
1050                 } else
1051                         *b++ = c;
1052                 if (++ftdi->recieved < ftdi->expected) {
1053                         goto have;
1054                 } else if (ftdi->ed_found) {
1055                         int ed_number = (ftdi->response[0] >> 5) & 0x03;
1056                         u16 ed_length = (ftdi->response[2] << 8) |
1057                                 ftdi->response[1];
1058                         struct u132_target *target = &ftdi->target[ed_number];
1059                         int payload = (ed_length >> 0) & 0x07FF;
1060                         char diag[30 *3 + 4];
1061                         char *d = diag;
1062                         int m = payload;
1063                         u8 *c = 4 + ftdi->response;
1064                         int s = (sizeof(diag) - 1) / 3;
1065                         diag[0] = 0;
1066                         while (s-- > 0 && m-- > 0) {
1067                                 if (s > 0 || m == 0) {
1068                                         d += sprintf(d, " %02X", *c++);
1069                                 } else
1070                                         d += sprintf(d, " ..");
1071                         }
1072                         ftdi_elan_do_callback(ftdi, target, 4 + ftdi->response,
1073                                 payload);
1074                         ftdi->recieved = 0;
1075                         ftdi->expected = 4;
1076                         ftdi->ed_found = 0;
1077                         b = ftdi->response;
1078                         goto have;
1079                 } else if (ftdi->expected == 8) {
1080                         u8 buscmd;
1081                         int respond_head = ftdi->respond_head++;
1082                         struct u132_respond *respond = &ftdi->respond[
1083                                 RESPOND_MASK & respond_head];
1084                         u32 data = ftdi->response[7];
1085                         data <<= 8;
1086                         data |= ftdi->response[6];
1087                         data <<= 8;
1088                         data |= ftdi->response[5];
1089                         data <<= 8;
1090                         data |= ftdi->response[4];
1091                         *respond->value = data;
1092                         *respond->result = 0;
1093                         complete(&respond->wait_completion);
1094                         ftdi->recieved = 0;
1095                         ftdi->expected = 4;
1096                         ftdi->ed_found = 0;
1097                         b = ftdi->response;
1098                         buscmd = (ftdi->response[0] >> 0) & 0x0F;
1099                         if (buscmd == 0x00) {
1100                         } else if (buscmd == 0x02) {
1101                         } else if (buscmd == 0x06) {
1102                         } else if (buscmd == 0x0A) {
1103                         } else
1104                                 dev_err(&ftdi->udev->dev, "Uxxx unknown(%0X) va"
1105                                         "lue = %08X\n", buscmd, data);
1106                         goto have;
1107                 } else {
1108                         if ((ftdi->response[0] & 0x80) == 0x00) {
1109                                 ftdi->expected = 8;
1110                                 goto have;
1111                         } else {
1112                                 int ed_number = (ftdi->response[0] >> 5) & 0x03;
1113                                 int ed_type = (ftdi->response[0] >> 0) & 0x03;
1114                                 u16 ed_length = (ftdi->response[2] << 8) |
1115                                         ftdi->response[1];
1116                                 struct u132_target *target = &ftdi->target[
1117                                         ed_number];
1118                                 target->halted = (ftdi->response[0] >> 3) &
1119                                         0x01;
1120                                 target->skipped = (ftdi->response[0] >> 2) &
1121                                         0x01;
1122                                 target->toggle_bits = (ftdi->response[3] >> 6)
1123                                         & 0x03;
1124                                 target->error_count = (ftdi->response[3] >> 4)
1125                                         & 0x03;
1126                                 target->condition_code = (ftdi->response[
1127                                         3] >> 0) & 0x0F;
1128                                 if ((ftdi->response[0] & 0x10) == 0x00) {
1129                                         b = have_ed_set_response(ftdi, target,
1130                                                 ed_length, ed_number, ed_type,
1131                                                 b);
1132                                         goto have;
1133                                 } else {
1134                                         b = have_ed_get_response(ftdi, target,
1135                                                 ed_length, ed_number, ed_type,
1136                                                 b);
1137                                         goto have;
1138                                 }
1139                         }
1140                 }
1141         } else
1142                 goto more;
1143 }
1144
1145
1146 /*
1147 * create a urb, and a buffer for it, and copy the data to the urb
1148 *
1149 */
1150 static ssize_t ftdi_elan_write(struct file *file,
1151                                const char __user *user_buffer, size_t count,
1152                                loff_t *ppos)
1153 {
1154         int retval = 0;
1155         struct urb *urb;
1156         char *buf;
1157         struct usb_ftdi *ftdi = file->private_data;
1158
1159         if (ftdi->disconnected > 0) {
1160                 return -ENODEV;
1161         }
1162         if (count == 0) {
1163                 goto exit;
1164         }
1165         urb = usb_alloc_urb(0, GFP_KERNEL);
1166         if (!urb) {
1167                 retval = -ENOMEM;
1168                 goto error_1;
1169         }
1170         buf = usb_alloc_coherent(ftdi->udev, count, GFP_KERNEL,
1171                 &urb->transfer_dma);
1172         if (!buf) {
1173                 retval = -ENOMEM;
1174                 goto error_2;
1175         }
1176         if (copy_from_user(buf, user_buffer, count)) {
1177                 retval = -EFAULT;
1178                 goto error_3;
1179         }
1180         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1181                 ftdi->bulk_out_endpointAddr), buf, count,
1182                 ftdi_elan_write_bulk_callback, ftdi);
1183         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1184         retval = usb_submit_urb(urb, GFP_KERNEL);
1185         if (retval) {
1186                 dev_err(&ftdi->udev->dev, "failed submitting write urb, error %"
1187                         "d\n", retval);
1188                 goto error_3;
1189         }
1190         usb_free_urb(urb);
1191
1192 exit:
1193         return count;
1194 error_3:
1195         usb_free_coherent(ftdi->udev, count, buf, urb->transfer_dma);
1196 error_2:
1197         usb_free_urb(urb);
1198 error_1:
1199         return retval;
1200 }
1201
1202 static const struct file_operations ftdi_elan_fops = {
1203         .owner = THIS_MODULE,
1204         .llseek = no_llseek,
1205         .read = ftdi_elan_read,
1206         .write = ftdi_elan_write,
1207         .open = ftdi_elan_open,
1208         .release = ftdi_elan_release,
1209 };
1210
1211 /*
1212 * usb class driver info in order to get a minor number from the usb core,
1213 * and to have the device registered with the driver core
1214 */
1215 static struct usb_class_driver ftdi_elan_jtag_class = {
1216         .name = "ftdi-%d-jtag",
1217         .fops = &ftdi_elan_fops,
1218         .minor_base = USB_FTDI_ELAN_MINOR_BASE,
1219 };
1220
1221 /*
1222 * the following definitions are for the
1223 * ELAN FPGA state machgine processor that
1224 * lies on the other side of the FTDI chip
1225 */
1226 #define cPCIu132rd 0x0
1227 #define cPCIu132wr 0x1
1228 #define cPCIiord 0x2
1229 #define cPCIiowr 0x3
1230 #define cPCImemrd 0x6
1231 #define cPCImemwr 0x7
1232 #define cPCIcfgrd 0xA
1233 #define cPCIcfgwr 0xB
1234 #define cPCInull 0xF
1235 #define cU132cmd_status 0x0
1236 #define cU132flash 0x1
1237 #define cPIDsetup 0x0
1238 #define cPIDout 0x1
1239 #define cPIDin 0x2
1240 #define cPIDinonce 0x3
1241 #define cCCnoerror 0x0
1242 #define cCCcrc 0x1
1243 #define cCCbitstuff 0x2
1244 #define cCCtoggle 0x3
1245 #define cCCstall 0x4
1246 #define cCCnoresp 0x5
1247 #define cCCbadpid1 0x6
1248 #define cCCbadpid2 0x7
1249 #define cCCdataoverrun 0x8
1250 #define cCCdataunderrun 0x9
1251 #define cCCbuffoverrun 0xC
1252 #define cCCbuffunderrun 0xD
1253 #define cCCnotaccessed 0xF
1254 static int ftdi_elan_write_reg(struct usb_ftdi *ftdi, u32 data)
1255 {
1256       wait:if (ftdi->disconnected > 0) {
1257                 return -ENODEV;
1258         } else {
1259                 int command_size;
1260                 mutex_lock(&ftdi->u132_lock);
1261                 command_size = ftdi->command_next - ftdi->command_head;
1262                 if (command_size < COMMAND_SIZE) {
1263                         struct u132_command *command = &ftdi->command[
1264                                 COMMAND_MASK & ftdi->command_next];
1265                         command->header = 0x00 | cPCIu132wr;
1266                         command->length = 0x04;
1267                         command->address = 0x00;
1268                         command->width = 0x00;
1269                         command->follows = 4;
1270                         command->value = data;
1271                         command->buffer = &command->value;
1272                         ftdi->command_next += 1;
1273                         ftdi_elan_kick_command_queue(ftdi);
1274                         mutex_unlock(&ftdi->u132_lock);
1275                         return 0;
1276                 } else {
1277                         mutex_unlock(&ftdi->u132_lock);
1278                         msleep(100);
1279                         goto wait;
1280                 }
1281         }
1282 }
1283
1284 static int ftdi_elan_write_config(struct usb_ftdi *ftdi, int config_offset,
1285         u8 width, u32 data)
1286 {
1287         u8 addressofs = config_offset / 4;
1288       wait:if (ftdi->disconnected > 0) {
1289                 return -ENODEV;
1290         } else {
1291                 int command_size;
1292                 mutex_lock(&ftdi->u132_lock);
1293                 command_size = ftdi->command_next - ftdi->command_head;
1294                 if (command_size < COMMAND_SIZE) {
1295                         struct u132_command *command = &ftdi->command[
1296                                 COMMAND_MASK & ftdi->command_next];
1297                         command->header = 0x00 | (cPCIcfgwr & 0x0F);
1298                         command->length = 0x04;
1299                         command->address = addressofs;
1300                         command->width = 0x00 | (width & 0x0F);
1301                         command->follows = 4;
1302                         command->value = data;
1303                         command->buffer = &command->value;
1304                         ftdi->command_next += 1;
1305                         ftdi_elan_kick_command_queue(ftdi);
1306                         mutex_unlock(&ftdi->u132_lock);
1307                         return 0;
1308                 } else {
1309                         mutex_unlock(&ftdi->u132_lock);
1310                         msleep(100);
1311                         goto wait;
1312                 }
1313         }
1314 }
1315
1316 static int ftdi_elan_write_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1317         u8 width, u32 data)
1318 {
1319         u8 addressofs = mem_offset / 4;
1320       wait:if (ftdi->disconnected > 0) {
1321                 return -ENODEV;
1322         } else {
1323                 int command_size;
1324                 mutex_lock(&ftdi->u132_lock);
1325                 command_size = ftdi->command_next - ftdi->command_head;
1326                 if (command_size < COMMAND_SIZE) {
1327                         struct u132_command *command = &ftdi->command[
1328                                 COMMAND_MASK & ftdi->command_next];
1329                         command->header = 0x00 | (cPCImemwr & 0x0F);
1330                         command->length = 0x04;
1331                         command->address = addressofs;
1332                         command->width = 0x00 | (width & 0x0F);
1333                         command->follows = 4;
1334                         command->value = data;
1335                         command->buffer = &command->value;
1336                         ftdi->command_next += 1;
1337                         ftdi_elan_kick_command_queue(ftdi);
1338                         mutex_unlock(&ftdi->u132_lock);
1339                         return 0;
1340                 } else {
1341                         mutex_unlock(&ftdi->u132_lock);
1342                         msleep(100);
1343                         goto wait;
1344                 }
1345         }
1346 }
1347
1348 int usb_ftdi_elan_write_pcimem(struct platform_device *pdev, int mem_offset,
1349         u8 width, u32 data)
1350 {
1351         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1352         return ftdi_elan_write_pcimem(ftdi, mem_offset, width, data);
1353 }
1354
1355
1356 EXPORT_SYMBOL_GPL(usb_ftdi_elan_write_pcimem);
1357 static int ftdi_elan_read_reg(struct usb_ftdi *ftdi, u32 *data)
1358 {
1359       wait:if (ftdi->disconnected > 0) {
1360                 return -ENODEV;
1361         } else {
1362                 int command_size;
1363                 int respond_size;
1364                 mutex_lock(&ftdi->u132_lock);
1365                 command_size = ftdi->command_next - ftdi->command_head;
1366                 respond_size = ftdi->respond_next - ftdi->respond_head;
1367                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1368                         {
1369                         struct u132_command *command = &ftdi->command[
1370                                 COMMAND_MASK & ftdi->command_next];
1371                         struct u132_respond *respond = &ftdi->respond[
1372                                 RESPOND_MASK & ftdi->respond_next];
1373                         int result = -ENODEV;
1374                         respond->result = &result;
1375                         respond->header = command->header = 0x00 | cPCIu132rd;
1376                         command->length = 0x04;
1377                         respond->address = command->address = cU132cmd_status;
1378                         command->width = 0x00;
1379                         command->follows = 0;
1380                         command->value = 0;
1381                         command->buffer = NULL;
1382                         respond->value = data;
1383                         init_completion(&respond->wait_completion);
1384                         ftdi->command_next += 1;
1385                         ftdi->respond_next += 1;
1386                         ftdi_elan_kick_command_queue(ftdi);
1387                         mutex_unlock(&ftdi->u132_lock);
1388                         wait_for_completion(&respond->wait_completion);
1389                         return result;
1390                 } else {
1391                         mutex_unlock(&ftdi->u132_lock);
1392                         msleep(100);
1393                         goto wait;
1394                 }
1395         }
1396 }
1397
1398 static int ftdi_elan_read_config(struct usb_ftdi *ftdi, int config_offset,
1399         u8 width, u32 *data)
1400 {
1401         u8 addressofs = config_offset / 4;
1402       wait:if (ftdi->disconnected > 0) {
1403                 return -ENODEV;
1404         } else {
1405                 int command_size;
1406                 int respond_size;
1407                 mutex_lock(&ftdi->u132_lock);
1408                 command_size = ftdi->command_next - ftdi->command_head;
1409                 respond_size = ftdi->respond_next - ftdi->respond_head;
1410                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1411                         {
1412                         struct u132_command *command = &ftdi->command[
1413                                 COMMAND_MASK & ftdi->command_next];
1414                         struct u132_respond *respond = &ftdi->respond[
1415                                 RESPOND_MASK & ftdi->respond_next];
1416                         int result = -ENODEV;
1417                         respond->result = &result;
1418                         respond->header = command->header = 0x00 | (cPCIcfgrd &
1419                                 0x0F);
1420                         command->length = 0x04;
1421                         respond->address = command->address = addressofs;
1422                         command->width = 0x00 | (width & 0x0F);
1423                         command->follows = 0;
1424                         command->value = 0;
1425                         command->buffer = NULL;
1426                         respond->value = data;
1427                         init_completion(&respond->wait_completion);
1428                         ftdi->command_next += 1;
1429                         ftdi->respond_next += 1;
1430                         ftdi_elan_kick_command_queue(ftdi);
1431                         mutex_unlock(&ftdi->u132_lock);
1432                         wait_for_completion(&respond->wait_completion);
1433                         return result;
1434                 } else {
1435                         mutex_unlock(&ftdi->u132_lock);
1436                         msleep(100);
1437                         goto wait;
1438                 }
1439         }
1440 }
1441
1442 static int ftdi_elan_read_pcimem(struct usb_ftdi *ftdi, int mem_offset,
1443         u8 width, u32 *data)
1444 {
1445         u8 addressofs = mem_offset / 4;
1446       wait:if (ftdi->disconnected > 0) {
1447                 return -ENODEV;
1448         } else {
1449                 int command_size;
1450                 int respond_size;
1451                 mutex_lock(&ftdi->u132_lock);
1452                 command_size = ftdi->command_next - ftdi->command_head;
1453                 respond_size = ftdi->respond_next - ftdi->respond_head;
1454                 if (command_size < COMMAND_SIZE && respond_size < RESPOND_SIZE)
1455                         {
1456                         struct u132_command *command = &ftdi->command[
1457                                 COMMAND_MASK & ftdi->command_next];
1458                         struct u132_respond *respond = &ftdi->respond[
1459                                 RESPOND_MASK & ftdi->respond_next];
1460                         int result = -ENODEV;
1461                         respond->result = &result;
1462                         respond->header = command->header = 0x00 | (cPCImemrd &
1463                                 0x0F);
1464                         command->length = 0x04;
1465                         respond->address = command->address = addressofs;
1466                         command->width = 0x00 | (width & 0x0F);
1467                         command->follows = 0;
1468                         command->value = 0;
1469                         command->buffer = NULL;
1470                         respond->value = data;
1471                         init_completion(&respond->wait_completion);
1472                         ftdi->command_next += 1;
1473                         ftdi->respond_next += 1;
1474                         ftdi_elan_kick_command_queue(ftdi);
1475                         mutex_unlock(&ftdi->u132_lock);
1476                         wait_for_completion(&respond->wait_completion);
1477                         return result;
1478                 } else {
1479                         mutex_unlock(&ftdi->u132_lock);
1480                         msleep(100);
1481                         goto wait;
1482                 }
1483         }
1484 }
1485
1486 int usb_ftdi_elan_read_pcimem(struct platform_device *pdev, int mem_offset,
1487         u8 width, u32 *data)
1488 {
1489         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1490         if (ftdi->initialized == 0) {
1491                 return -ENODEV;
1492         } else
1493                 return ftdi_elan_read_pcimem(ftdi, mem_offset, width, data);
1494 }
1495
1496
1497 EXPORT_SYMBOL_GPL(usb_ftdi_elan_read_pcimem);
1498 static int ftdi_elan_edset_setup(struct usb_ftdi *ftdi, u8 ed_number,
1499         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1500         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1501         int toggle_bits, int error_count, int condition_code, int repeat_number,
1502          int halted, int skipped, int actual, int non_null))
1503 {
1504         u8 ed = ed_number - 1;
1505       wait:if (ftdi->disconnected > 0) {
1506                 return -ENODEV;
1507         } else if (ftdi->initialized == 0) {
1508                 return -ENODEV;
1509         } else {
1510                 int command_size;
1511                 mutex_lock(&ftdi->u132_lock);
1512                 command_size = ftdi->command_next - ftdi->command_head;
1513                 if (command_size < COMMAND_SIZE) {
1514                         struct u132_target *target = &ftdi->target[ed];
1515                         struct u132_command *command = &ftdi->command[
1516                                 COMMAND_MASK & ftdi->command_next];
1517                         command->header = 0x80 | (ed << 5);
1518                         command->length = 0x8007;
1519                         command->address = (toggle_bits << 6) | (ep_number << 2)
1520                                 | (address << 0);
1521                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1522                                 usb_pipeout(urb->pipe));
1523                         command->follows = 8;
1524                         command->value = 0;
1525                         command->buffer = urb->setup_packet;
1526                         target->callback = callback;
1527                         target->endp = endp;
1528                         target->urb = urb;
1529                         target->active = 1;
1530                         ftdi->command_next += 1;
1531                         ftdi_elan_kick_command_queue(ftdi);
1532                         mutex_unlock(&ftdi->u132_lock);
1533                         return 0;
1534                 } else {
1535                         mutex_unlock(&ftdi->u132_lock);
1536                         msleep(100);
1537                         goto wait;
1538                 }
1539         }
1540 }
1541
1542 int usb_ftdi_elan_edset_setup(struct platform_device *pdev, u8 ed_number,
1543         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1544         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1545         int toggle_bits, int error_count, int condition_code, int repeat_number,
1546          int halted, int skipped, int actual, int non_null))
1547 {
1548         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1549         return ftdi_elan_edset_setup(ftdi, ed_number, endp, urb, address,
1550                 ep_number, toggle_bits, callback);
1551 }
1552
1553
1554 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_setup);
1555 static int ftdi_elan_edset_input(struct usb_ftdi *ftdi, u8 ed_number,
1556         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1557         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1558         int toggle_bits, int error_count, int condition_code, int repeat_number,
1559          int halted, int skipped, int actual, int non_null))
1560 {
1561         u8 ed = ed_number - 1;
1562       wait:if (ftdi->disconnected > 0) {
1563                 return -ENODEV;
1564         } else if (ftdi->initialized == 0) {
1565                 return -ENODEV;
1566         } else {
1567                 int command_size;
1568                 mutex_lock(&ftdi->u132_lock);
1569                 command_size = ftdi->command_next - ftdi->command_head;
1570                 if (command_size < COMMAND_SIZE) {
1571                         struct u132_target *target = &ftdi->target[ed];
1572                         struct u132_command *command = &ftdi->command[
1573                                 COMMAND_MASK & ftdi->command_next];
1574                         u32 remaining_length = urb->transfer_buffer_length -
1575                                 urb->actual_length;
1576                         command->header = 0x82 | (ed << 5);
1577                         if (remaining_length == 0) {
1578                                 command->length = 0x0000;
1579                         } else if (remaining_length > 1024) {
1580                                 command->length = 0x8000 | 1023;
1581                         } else
1582                                 command->length = 0x8000 | (remaining_length -
1583                                         1);
1584                         command->address = (toggle_bits << 6) | (ep_number << 2)
1585                                 | (address << 0);
1586                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1587                                 usb_pipeout(urb->pipe));
1588                         command->follows = 0;
1589                         command->value = 0;
1590                         command->buffer = NULL;
1591                         target->callback = callback;
1592                         target->endp = endp;
1593                         target->urb = urb;
1594                         target->active = 1;
1595                         ftdi->command_next += 1;
1596                         ftdi_elan_kick_command_queue(ftdi);
1597                         mutex_unlock(&ftdi->u132_lock);
1598                         return 0;
1599                 } else {
1600                         mutex_unlock(&ftdi->u132_lock);
1601                         msleep(100);
1602                         goto wait;
1603                 }
1604         }
1605 }
1606
1607 int usb_ftdi_elan_edset_input(struct platform_device *pdev, u8 ed_number,
1608         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1609         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1610         int toggle_bits, int error_count, int condition_code, int repeat_number,
1611          int halted, int skipped, int actual, int non_null))
1612 {
1613         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1614         return ftdi_elan_edset_input(ftdi, ed_number, endp, urb, address,
1615                 ep_number, toggle_bits, callback);
1616 }
1617
1618
1619 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_input);
1620 static int ftdi_elan_edset_empty(struct usb_ftdi *ftdi, u8 ed_number,
1621         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1622         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1623         int toggle_bits, int error_count, int condition_code, int repeat_number,
1624          int halted, int skipped, int actual, int non_null))
1625 {
1626         u8 ed = ed_number - 1;
1627       wait:if (ftdi->disconnected > 0) {
1628                 return -ENODEV;
1629         } else if (ftdi->initialized == 0) {
1630                 return -ENODEV;
1631         } else {
1632                 int command_size;
1633                 mutex_lock(&ftdi->u132_lock);
1634                 command_size = ftdi->command_next - ftdi->command_head;
1635                 if (command_size < COMMAND_SIZE) {
1636                         struct u132_target *target = &ftdi->target[ed];
1637                         struct u132_command *command = &ftdi->command[
1638                                 COMMAND_MASK & ftdi->command_next];
1639                         command->header = 0x81 | (ed << 5);
1640                         command->length = 0x0000;
1641                         command->address = (toggle_bits << 6) | (ep_number << 2)
1642                                 | (address << 0);
1643                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1644                                 usb_pipeout(urb->pipe));
1645                         command->follows = 0;
1646                         command->value = 0;
1647                         command->buffer = NULL;
1648                         target->callback = callback;
1649                         target->endp = endp;
1650                         target->urb = urb;
1651                         target->active = 1;
1652                         ftdi->command_next += 1;
1653                         ftdi_elan_kick_command_queue(ftdi);
1654                         mutex_unlock(&ftdi->u132_lock);
1655                         return 0;
1656                 } else {
1657                         mutex_unlock(&ftdi->u132_lock);
1658                         msleep(100);
1659                         goto wait;
1660                 }
1661         }
1662 }
1663
1664 int usb_ftdi_elan_edset_empty(struct platform_device *pdev, u8 ed_number,
1665         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1666         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1667         int toggle_bits, int error_count, int condition_code, int repeat_number,
1668          int halted, int skipped, int actual, int non_null))
1669 {
1670         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1671         return ftdi_elan_edset_empty(ftdi, ed_number, endp, urb, address,
1672                 ep_number, toggle_bits, callback);
1673 }
1674
1675
1676 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_empty);
1677 static int ftdi_elan_edset_output(struct usb_ftdi *ftdi, u8 ed_number,
1678         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1679         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1680         int toggle_bits, int error_count, int condition_code, int repeat_number,
1681          int halted, int skipped, int actual, int non_null))
1682 {
1683         u8 ed = ed_number - 1;
1684       wait:if (ftdi->disconnected > 0) {
1685                 return -ENODEV;
1686         } else if (ftdi->initialized == 0) {
1687                 return -ENODEV;
1688         } else {
1689                 int command_size;
1690                 mutex_lock(&ftdi->u132_lock);
1691                 command_size = ftdi->command_next - ftdi->command_head;
1692                 if (command_size < COMMAND_SIZE) {
1693                         u8 *b;
1694                         u16 urb_size;
1695                         int i = 0;
1696                         char data[30 *3 + 4];
1697                         char *d = data;
1698                         int m = (sizeof(data) - 1) / 3;
1699                         int l = 0;
1700                         struct u132_target *target = &ftdi->target[ed];
1701                         struct u132_command *command = &ftdi->command[
1702                                 COMMAND_MASK & ftdi->command_next];
1703                         command->header = 0x81 | (ed << 5);
1704                         command->address = (toggle_bits << 6) | (ep_number << 2)
1705                                 | (address << 0);
1706                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1707                                 usb_pipeout(urb->pipe));
1708                         command->follows = min_t(u32, 1024,
1709                                 urb->transfer_buffer_length -
1710                                 urb->actual_length);
1711                         command->value = 0;
1712                         command->buffer = urb->transfer_buffer +
1713                                 urb->actual_length;
1714                         command->length = 0x8000 | (command->follows - 1);
1715                         b = command->buffer;
1716                         urb_size = command->follows;
1717                         data[0] = 0;
1718                         while (urb_size-- > 0) {
1719                                 if (i > m) {
1720                                 } else if (i++ < m) {
1721                                         int w = sprintf(d, " %02X", *b++);
1722                                         d += w;
1723                                         l += w;
1724                                 } else
1725                                         d += sprintf(d, " ..");
1726                         }
1727                         target->callback = callback;
1728                         target->endp = endp;
1729                         target->urb = urb;
1730                         target->active = 1;
1731                         ftdi->command_next += 1;
1732                         ftdi_elan_kick_command_queue(ftdi);
1733                         mutex_unlock(&ftdi->u132_lock);
1734                         return 0;
1735                 } else {
1736                         mutex_unlock(&ftdi->u132_lock);
1737                         msleep(100);
1738                         goto wait;
1739                 }
1740         }
1741 }
1742
1743 int usb_ftdi_elan_edset_output(struct platform_device *pdev, u8 ed_number,
1744         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1745         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1746         int toggle_bits, int error_count, int condition_code, int repeat_number,
1747          int halted, int skipped, int actual, int non_null))
1748 {
1749         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1750         return ftdi_elan_edset_output(ftdi, ed_number, endp, urb, address,
1751                 ep_number, toggle_bits, callback);
1752 }
1753
1754
1755 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_output);
1756 static int ftdi_elan_edset_single(struct usb_ftdi *ftdi, u8 ed_number,
1757         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1758         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1759         int toggle_bits, int error_count, int condition_code, int repeat_number,
1760          int halted, int skipped, int actual, int non_null))
1761 {
1762         u8 ed = ed_number - 1;
1763       wait:if (ftdi->disconnected > 0) {
1764                 return -ENODEV;
1765         } else if (ftdi->initialized == 0) {
1766                 return -ENODEV;
1767         } else {
1768                 int command_size;
1769                 mutex_lock(&ftdi->u132_lock);
1770                 command_size = ftdi->command_next - ftdi->command_head;
1771                 if (command_size < COMMAND_SIZE) {
1772                         u32 remaining_length = urb->transfer_buffer_length -
1773                                 urb->actual_length;
1774                         struct u132_target *target = &ftdi->target[ed];
1775                         struct u132_command *command = &ftdi->command[
1776                                 COMMAND_MASK & ftdi->command_next];
1777                         command->header = 0x83 | (ed << 5);
1778                         if (remaining_length == 0) {
1779                                 command->length = 0x0000;
1780                         } else if (remaining_length > 1024) {
1781                                 command->length = 0x8000 | 1023;
1782                         } else
1783                                 command->length = 0x8000 | (remaining_length -
1784                                         1);
1785                         command->address = (toggle_bits << 6) | (ep_number << 2)
1786                                 | (address << 0);
1787                         command->width = usb_maxpacket(urb->dev, urb->pipe,
1788                                 usb_pipeout(urb->pipe));
1789                         command->follows = 0;
1790                         command->value = 0;
1791                         command->buffer = NULL;
1792                         target->callback = callback;
1793                         target->endp = endp;
1794                         target->urb = urb;
1795                         target->active = 1;
1796                         ftdi->command_next += 1;
1797                         ftdi_elan_kick_command_queue(ftdi);
1798                         mutex_unlock(&ftdi->u132_lock);
1799                         return 0;
1800                 } else {
1801                         mutex_unlock(&ftdi->u132_lock);
1802                         msleep(100);
1803                         goto wait;
1804                 }
1805         }
1806 }
1807
1808 int usb_ftdi_elan_edset_single(struct platform_device *pdev, u8 ed_number,
1809         void *endp, struct urb *urb, u8 address, u8 ep_number, u8 toggle_bits,
1810         void (*callback) (void *endp, struct urb *urb, u8 *buf, int len,
1811         int toggle_bits, int error_count, int condition_code, int repeat_number,
1812          int halted, int skipped, int actual, int non_null))
1813 {
1814         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1815         return ftdi_elan_edset_single(ftdi, ed_number, endp, urb, address,
1816                 ep_number, toggle_bits, callback);
1817 }
1818
1819
1820 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_single);
1821 static int ftdi_elan_edset_flush(struct usb_ftdi *ftdi, u8 ed_number,
1822         void *endp)
1823 {
1824         u8 ed = ed_number - 1;
1825         if (ftdi->disconnected > 0) {
1826                 return -ENODEV;
1827         } else if (ftdi->initialized == 0) {
1828                 return -ENODEV;
1829         } else {
1830                 struct u132_target *target = &ftdi->target[ed];
1831                 mutex_lock(&ftdi->u132_lock);
1832                 if (target->abandoning > 0) {
1833                         mutex_unlock(&ftdi->u132_lock);
1834                         return 0;
1835                 } else {
1836                         target->abandoning = 1;
1837                       wait_1:if (target->active == 1) {
1838                                 int command_size = ftdi->command_next -
1839                                         ftdi->command_head;
1840                                 if (command_size < COMMAND_SIZE) {
1841                                         struct u132_command *command =
1842                                                 &ftdi->command[COMMAND_MASK &
1843                                                 ftdi->command_next];
1844                                         command->header = 0x80 | (ed << 5) |
1845                                                 0x4;
1846                                         command->length = 0x00;
1847                                         command->address = 0x00;
1848                                         command->width = 0x00;
1849                                         command->follows = 0;
1850                                         command->value = 0;
1851                                         command->buffer = &command->value;
1852                                         ftdi->command_next += 1;
1853                                         ftdi_elan_kick_command_queue(ftdi);
1854                                 } else {
1855                                         mutex_unlock(&ftdi->u132_lock);
1856                                         msleep(100);
1857                                         mutex_lock(&ftdi->u132_lock);
1858                                         goto wait_1;
1859                                 }
1860                         }
1861                         mutex_unlock(&ftdi->u132_lock);
1862                         return 0;
1863                 }
1864         }
1865 }
1866
1867 int usb_ftdi_elan_edset_flush(struct platform_device *pdev, u8 ed_number,
1868         void *endp)
1869 {
1870         struct usb_ftdi *ftdi = platform_device_to_usb_ftdi(pdev);
1871         return ftdi_elan_edset_flush(ftdi, ed_number, endp);
1872 }
1873
1874
1875 EXPORT_SYMBOL_GPL(usb_ftdi_elan_edset_flush);
1876 static int ftdi_elan_flush_input_fifo(struct usb_ftdi *ftdi)
1877 {
1878         int retry_on_empty = 10;
1879         int retry_on_timeout = 5;
1880         int retry_on_status = 20;
1881       more:{
1882                 int packet_bytes = 0;
1883                 int retval = usb_bulk_msg(ftdi->udev,
1884                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
1885                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
1886                         &packet_bytes, 100);
1887                 if (packet_bytes > 2) {
1888                         char diag[30 *3 + 4];
1889                         char *d = diag;
1890                         int m = (sizeof(diag) - 1) / 3;
1891                         char *b = ftdi->bulk_in_buffer;
1892                         int bytes_read = 0;
1893                         diag[0] = 0;
1894                         while (packet_bytes-- > 0) {
1895                                 char c = *b++;
1896                                 if (bytes_read < m) {
1897                                         d += sprintf(d, " %02X",
1898                                                 0x000000FF & c);
1899                                 } else if (bytes_read > m) {
1900                                 } else
1901                                         d += sprintf(d, " ..");
1902                                 bytes_read += 1;
1903                                 continue;
1904                         }
1905                         goto more;
1906                 } else if (packet_bytes > 1) {
1907                         char s1 = ftdi->bulk_in_buffer[0];
1908                         char s2 = ftdi->bulk_in_buffer[1];
1909                         if (s1 == 0x31 && s2 == 0x60) {
1910                                 return 0;
1911                         } else if (retry_on_status-- > 0) {
1912                                 goto more;
1913                         } else {
1914                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1915                                         "imit reached\n");
1916                                 return -EFAULT;
1917                         }
1918                 } else if (packet_bytes > 0) {
1919                         char b1 = ftdi->bulk_in_buffer[0];
1920                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
1921                                 "TDI = %02X\n", b1);
1922                         if (retry_on_status-- > 0) {
1923                                 goto more;
1924                         } else {
1925                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
1926                                         "imit reached\n");
1927                                 return -EFAULT;
1928                         }
1929                 } else if (retval == -ETIMEDOUT) {
1930                         if (retry_on_timeout-- > 0) {
1931                                 goto more;
1932                         } else {
1933                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
1934                                         "t reached\n");
1935                                 return -ENOMEM;
1936                         }
1937                 } else if (retval == 0) {
1938                         if (retry_on_empty-- > 0) {
1939                                 goto more;
1940                         } else {
1941                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
1942                                         "imit reached\n");
1943                                 return -ENOMEM;
1944                         }
1945                 } else {
1946                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
1947                         return retval;
1948                 }
1949         }
1950         return -1;
1951 }
1952
1953
1954 /*
1955 * send the long flush sequence
1956 *
1957 */
1958 static int ftdi_elan_synchronize_flush(struct usb_ftdi *ftdi)
1959 {
1960         int retval;
1961         struct urb *urb;
1962         char *buf;
1963         int I = 257;
1964         int i = 0;
1965         urb = usb_alloc_urb(0, GFP_KERNEL);
1966         if (!urb) {
1967                 dev_err(&ftdi->udev->dev, "could not alloc a urb for flush sequ"
1968                         "ence\n");
1969                 return -ENOMEM;
1970         }
1971         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
1972         if (!buf) {
1973                 dev_err(&ftdi->udev->dev, "could not get a buffer for flush seq"
1974                         "uence\n");
1975                 usb_free_urb(urb);
1976                 return -ENOMEM;
1977         }
1978         while (I-- > 0)
1979                 buf[i++] = 0x55;
1980         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
1981                 ftdi->bulk_out_endpointAddr), buf, i,
1982                 ftdi_elan_write_bulk_callback, ftdi);
1983         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1984         retval = usb_submit_urb(urb, GFP_KERNEL);
1985         if (retval) {
1986                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
1987                         "flush sequence\n");
1988                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
1989                 usb_free_urb(urb);
1990                 return -ENOMEM;
1991         }
1992         usb_free_urb(urb);
1993         return 0;
1994 }
1995
1996
1997 /*
1998 * send the reset sequence
1999 *
2000 */
2001 static int ftdi_elan_synchronize_reset(struct usb_ftdi *ftdi)
2002 {
2003         int retval;
2004         struct urb *urb;
2005         char *buf;
2006         int I = 4;
2007         int i = 0;
2008         urb = usb_alloc_urb(0, GFP_KERNEL);
2009         if (!urb) {
2010                 dev_err(&ftdi->udev->dev, "could not get a urb for the reset se"
2011                         "quence\n");
2012                 return -ENOMEM;
2013         }
2014         buf = usb_alloc_coherent(ftdi->udev, I, GFP_KERNEL, &urb->transfer_dma);
2015         if (!buf) {
2016                 dev_err(&ftdi->udev->dev, "could not get a buffer for the reset"
2017                         " sequence\n");
2018                 usb_free_urb(urb);
2019                 return -ENOMEM;
2020         }
2021         buf[i++] = 0x55;
2022         buf[i++] = 0xAA;
2023         buf[i++] = 0x5A;
2024         buf[i++] = 0xA5;
2025         usb_fill_bulk_urb(urb, ftdi->udev, usb_sndbulkpipe(ftdi->udev,
2026                 ftdi->bulk_out_endpointAddr), buf, i,
2027                 ftdi_elan_write_bulk_callback, ftdi);
2028         urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
2029         retval = usb_submit_urb(urb, GFP_KERNEL);
2030         if (retval) {
2031                 dev_err(&ftdi->udev->dev, "failed to submit urb containing the "
2032                         "reset sequence\n");
2033                 usb_free_coherent(ftdi->udev, i, buf, urb->transfer_dma);
2034                 usb_free_urb(urb);
2035                 return -ENOMEM;
2036         }
2037         usb_free_urb(urb);
2038         return 0;
2039 }
2040
2041 static int ftdi_elan_synchronize(struct usb_ftdi *ftdi)
2042 {
2043         int retval;
2044         int long_stop = 10;
2045         int retry_on_timeout = 5;
2046         int retry_on_empty = 10;
2047         int err_count = 0;
2048         retval = ftdi_elan_flush_input_fifo(ftdi);
2049         if (retval)
2050                 return retval;
2051         ftdi->bulk_in_left = 0;
2052         ftdi->bulk_in_last = -1;
2053         while (long_stop-- > 0) {
2054                 int read_stop;
2055                 int read_stuck;
2056                 retval = ftdi_elan_synchronize_flush(ftdi);
2057                 if (retval)
2058                         return retval;
2059                 retval = ftdi_elan_flush_input_fifo(ftdi);
2060                 if (retval)
2061                         return retval;
2062               reset:retval = ftdi_elan_synchronize_reset(ftdi);
2063                 if (retval)
2064                         return retval;
2065                 read_stop = 100;
2066                 read_stuck = 10;
2067               read:{
2068                         int packet_bytes = 0;
2069                         retval = usb_bulk_msg(ftdi->udev,
2070                                 usb_rcvbulkpipe(ftdi->udev,
2071                                 ftdi->bulk_in_endpointAddr),
2072                                 ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2073                                 &packet_bytes, 500);
2074                         if (packet_bytes > 2) {
2075                                 char diag[30 *3 + 4];
2076                                 char *d = diag;
2077                                 int m = (sizeof(diag) - 1) / 3;
2078                                 char *b = ftdi->bulk_in_buffer;
2079                                 int bytes_read = 0;
2080                                 unsigned char c = 0;
2081                                 diag[0] = 0;
2082                                 while (packet_bytes-- > 0) {
2083                                         c = *b++;
2084                                         if (bytes_read < m) {
2085                                                 d += sprintf(d, " %02X", c);
2086                                         } else if (bytes_read > m) {
2087                                         } else
2088                                                 d += sprintf(d, " ..");
2089                                         bytes_read += 1;
2090                                         continue;
2091                                 }
2092                                 if (c == 0x7E) {
2093                                         return 0;
2094                                 } else {
2095                                         if (c == 0x55) {
2096                                                 goto read;
2097                                         } else if (read_stop-- > 0) {
2098                                                 goto read;
2099                                         } else {
2100                                                 dev_err(&ftdi->udev->dev, "retr"
2101                                                         "y limit reached\n");
2102                                                 continue;
2103                                         }
2104                                 }
2105                         } else if (packet_bytes > 1) {
2106                                 unsigned char s1 = ftdi->bulk_in_buffer[0];
2107                                 unsigned char s2 = ftdi->bulk_in_buffer[1];
2108                                 if (s1 == 0x31 && s2 == 0x00) {
2109                                         if (read_stuck-- > 0) {
2110                                                 goto read;
2111                                         } else
2112                                                 goto reset;
2113                                 } else if (s1 == 0x31 && s2 == 0x60) {
2114                                         if (read_stop-- > 0) {
2115                                                 goto read;
2116                                         } else {
2117                                                 dev_err(&ftdi->udev->dev, "retr"
2118                                                         "y limit reached\n");
2119                                                 continue;
2120                                         }
2121                                 } else {
2122                                         if (read_stop-- > 0) {
2123                                                 goto read;
2124                                         } else {
2125                                                 dev_err(&ftdi->udev->dev, "retr"
2126                                                         "y limit reached\n");
2127                                                 continue;
2128                                         }
2129                                 }
2130                         } else if (packet_bytes > 0) {
2131                                 if (read_stop-- > 0) {
2132                                         goto read;
2133                                 } else {
2134                                         dev_err(&ftdi->udev->dev, "retry limit "
2135                                                 "reached\n");
2136                                         continue;
2137                                 }
2138                         } else if (retval == -ETIMEDOUT) {
2139                                 if (retry_on_timeout-- > 0) {
2140                                         goto read;
2141                                 } else {
2142                                         dev_err(&ftdi->udev->dev, "TIMED OUT re"
2143                                                 "try limit reached\n");
2144                                         continue;
2145                                 }
2146                         } else if (retval == 0) {
2147                                 if (retry_on_empty-- > 0) {
2148                                         goto read;
2149                                 } else {
2150                                         dev_err(&ftdi->udev->dev, "empty packet"
2151                                                 " retry limit reached\n");
2152                                         continue;
2153                                 }
2154                         } else {
2155                                 err_count += 1;
2156                                 dev_err(&ftdi->udev->dev, "error = %d\n",
2157                                         retval);
2158                                 if (read_stop-- > 0) {
2159                                         goto read;
2160                                 } else {
2161                                         dev_err(&ftdi->udev->dev, "retry limit "
2162                                                 "reached\n");
2163                                         continue;
2164                                 }
2165                         }
2166                 }
2167         }
2168         dev_err(&ftdi->udev->dev, "failed to synchronize\n");
2169         return -EFAULT;
2170 }
2171
2172 static int ftdi_elan_stuck_waiting(struct usb_ftdi *ftdi)
2173 {
2174         int retry_on_empty = 10;
2175         int retry_on_timeout = 5;
2176         int retry_on_status = 50;
2177       more:{
2178                 int packet_bytes = 0;
2179                 int retval = usb_bulk_msg(ftdi->udev,
2180                         usb_rcvbulkpipe(ftdi->udev, ftdi->bulk_in_endpointAddr),
2181                          ftdi->bulk_in_buffer, ftdi->bulk_in_size,
2182                         &packet_bytes, 1000);
2183                 if (packet_bytes > 2) {
2184                         char diag[30 *3 + 4];
2185                         char *d = diag;
2186                         int m = (sizeof(diag) - 1) / 3;
2187                         char *b = ftdi->bulk_in_buffer;
2188                         int bytes_read = 0;
2189                         diag[0] = 0;
2190                         while (packet_bytes-- > 0) {
2191                                 char c = *b++;
2192                                 if (bytes_read < m) {
2193                                         d += sprintf(d, " %02X",
2194                                                 0x000000FF & c);
2195                                 } else if (bytes_read > m) {
2196                                 } else
2197                                         d += sprintf(d, " ..");
2198                                 bytes_read += 1;
2199                                 continue;
2200                         }
2201                         goto more;
2202                 } else if (packet_bytes > 1) {
2203                         char s1 = ftdi->bulk_in_buffer[0];
2204                         char s2 = ftdi->bulk_in_buffer[1];
2205                         if (s1 == 0x31 && s2 == 0x60) {
2206                                 return 0;
2207                         } else if (retry_on_status-- > 0) {
2208                                 msleep(5);
2209                                 goto more;
2210                         } else
2211                                 return -EFAULT;
2212                 } else if (packet_bytes > 0) {
2213                         char b1 = ftdi->bulk_in_buffer[0];
2214                         dev_err(&ftdi->udev->dev, "only one byte flushed from F"
2215                                 "TDI = %02X\n", b1);
2216                         if (retry_on_status-- > 0) {
2217                                 msleep(5);
2218                                 goto more;
2219                         } else {
2220                                 dev_err(&ftdi->udev->dev, "STATUS ERROR retry l"
2221                                         "imit reached\n");
2222                                 return -EFAULT;
2223                         }
2224                 } else if (retval == -ETIMEDOUT) {
2225                         if (retry_on_timeout-- > 0) {
2226                                 goto more;
2227                         } else {
2228                                 dev_err(&ftdi->udev->dev, "TIMED OUT retry limi"
2229                                         "t reached\n");
2230                                 return -ENOMEM;
2231                         }
2232                 } else if (retval == 0) {
2233                         if (retry_on_empty-- > 0) {
2234                                 goto more;
2235                         } else {
2236                                 dev_err(&ftdi->udev->dev, "empty packet retry l"
2237                                         "imit reached\n");
2238                                 return -ENOMEM;
2239                         }
2240                 } else {
2241                         dev_err(&ftdi->udev->dev, "error = %d\n", retval);
2242                         return -ENOMEM;
2243                 }
2244         }
2245         return -1;
2246 }
2247
2248 static int ftdi_elan_checkingPCI(struct usb_ftdi *ftdi)
2249 {
2250         int UxxxStatus = ftdi_elan_read_reg(ftdi, &ftdi->controlreg);
2251         if (UxxxStatus)
2252                 return UxxxStatus;
2253         if (ftdi->controlreg & 0x00400000) {
2254                 if (ftdi->card_ejected) {
2255                 } else {
2256                         ftdi->card_ejected = 1;
2257                         dev_err(&ftdi->udev->dev, "CARD EJECTED - controlreg = "
2258                                 "%08X\n", ftdi->controlreg);
2259                 }
2260                 return -ENODEV;
2261         } else {
2262                 u8 fn = ftdi->function - 1;
2263                 int activePCIfn = fn << 8;
2264                 u32 pcidata;
2265                 u32 pciVID;
2266                 u32 pciPID;
2267                 int reg = 0;
2268                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2269                         &pcidata);
2270                 if (UxxxStatus)
2271                         return UxxxStatus;
2272                 pciVID = pcidata & 0xFFFF;
2273                 pciPID = (pcidata >> 16) & 0xFFFF;
2274                 if (pciVID == ftdi->platform_data.vendor && pciPID ==
2275                         ftdi->platform_data.device) {
2276                         return 0;
2277                 } else {
2278                         dev_err(&ftdi->udev->dev, "vendor=%04X pciVID=%04X devi"
2279                                 "ce=%04X pciPID=%04X\n",
2280                                 ftdi->platform_data.vendor, pciVID,
2281                                 ftdi->platform_data.device, pciPID);
2282                         return -ENODEV;
2283                 }
2284         }
2285 }
2286
2287
2288 #define ftdi_read_pcimem(ftdi, member, data) ftdi_elan_read_pcimem(ftdi, \
2289         offsetof(struct ohci_regs, member), 0, data);
2290 #define ftdi_write_pcimem(ftdi, member, data) ftdi_elan_write_pcimem(ftdi, \
2291         offsetof(struct ohci_regs, member), 0, data);
2292
2293 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
2294 #define OHCI_INTR_INIT (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | \
2295         OHCI_INTR_WDH)
2296 static int ftdi_elan_check_controller(struct usb_ftdi *ftdi, int quirk)
2297 {
2298         int devices = 0;
2299         int retval;
2300         u32 hc_control;
2301         int num_ports;
2302         u32 control;
2303         u32 rh_a = -1;
2304         u32 status;
2305         u32 fminterval;
2306         u32 hc_fminterval;
2307         u32 periodicstart;
2308         u32 cmdstatus;
2309         u32 roothub_a;
2310         int mask = OHCI_INTR_INIT;
2311         int sleep_time = 0;
2312         int reset_timeout = 30;        /* ... allow extra time */
2313         int temp;
2314         retval = ftdi_write_pcimem(ftdi, intrdisable, OHCI_INTR_MIE);
2315         if (retval)
2316                 return retval;
2317         retval = ftdi_read_pcimem(ftdi, control, &control);
2318         if (retval)
2319                 return retval;
2320         retval = ftdi_read_pcimem(ftdi, roothub.a, &rh_a);
2321         if (retval)
2322                 return retval;
2323         num_ports = rh_a & RH_A_NDP;
2324         retval = ftdi_read_pcimem(ftdi, fminterval, &hc_fminterval);
2325         if (retval)
2326                 return retval;
2327         hc_fminterval &= 0x3fff;
2328         if (hc_fminterval != FI) {
2329         }
2330         hc_fminterval |= FSMP(hc_fminterval) << 16;
2331         retval = ftdi_read_pcimem(ftdi, control, &hc_control);
2332         if (retval)
2333                 return retval;
2334         switch (hc_control & OHCI_CTRL_HCFS) {
2335         case OHCI_USB_OPER:
2336                 sleep_time = 0;
2337                 break;
2338         case OHCI_USB_SUSPEND:
2339         case OHCI_USB_RESUME:
2340                 hc_control &= OHCI_CTRL_RWC;
2341                 hc_control |= OHCI_USB_RESUME;
2342                 sleep_time = 10;
2343                 break;
2344         default:
2345                 hc_control &= OHCI_CTRL_RWC;
2346                 hc_control |= OHCI_USB_RESET;
2347                 sleep_time = 50;
2348                 break;
2349         }
2350         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2351         if (retval)
2352                 return retval;
2353         retval = ftdi_read_pcimem(ftdi, control, &control);
2354         if (retval)
2355                 return retval;
2356         msleep(sleep_time);
2357         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2358         if (retval)
2359                 return retval;
2360         if (!(roothub_a & RH_A_NPS)) {        /* power down each port */
2361                 for (temp = 0; temp < num_ports; temp++) {
2362                         retval = ftdi_write_pcimem(ftdi,
2363                                 roothub.portstatus[temp], RH_PS_LSDA);
2364                         if (retval)
2365                                 return retval;
2366                 }
2367         }
2368         retval = ftdi_read_pcimem(ftdi, control, &control);
2369         if (retval)
2370                 return retval;
2371       retry:retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2372         if (retval)
2373                 return retval;
2374         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_HCR);
2375         if (retval)
2376                 return retval;
2377       extra:{
2378                 retval = ftdi_read_pcimem(ftdi, cmdstatus, &status);
2379                 if (retval)
2380                         return retval;
2381                 if (0 != (status & OHCI_HCR)) {
2382                         if (--reset_timeout == 0) {
2383                                 dev_err(&ftdi->udev->dev, "USB HC reset timed o"
2384                                         "ut!\n");
2385                                 return -ENODEV;
2386                         } else {
2387                                 msleep(5);
2388                                 goto extra;
2389                         }
2390                 }
2391         }
2392         if (quirk & OHCI_QUIRK_INITRESET) {
2393                 retval = ftdi_write_pcimem(ftdi, control, hc_control);
2394                 if (retval)
2395                         return retval;
2396                 retval = ftdi_read_pcimem(ftdi, control, &control);
2397                 if (retval)
2398                         return retval;
2399         }
2400         retval = ftdi_write_pcimem(ftdi, ed_controlhead, 0x00000000);
2401         if (retval)
2402                 return retval;
2403         retval = ftdi_write_pcimem(ftdi, ed_bulkhead, 0x11000000);
2404         if (retval)
2405                 return retval;
2406         retval = ftdi_write_pcimem(ftdi, hcca, 0x00000000);
2407         if (retval)
2408                 return retval;
2409         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2410         if (retval)
2411                 return retval;
2412         retval = ftdi_write_pcimem(ftdi, fminterval,
2413                 ((fminterval & FIT) ^ FIT) | hc_fminterval);
2414         if (retval)
2415                 return retval;
2416         retval = ftdi_write_pcimem(ftdi, periodicstart,
2417                 ((9 *hc_fminterval) / 10) & 0x3fff);
2418         if (retval)
2419                 return retval;
2420         retval = ftdi_read_pcimem(ftdi, fminterval, &fminterval);
2421         if (retval)
2422                 return retval;
2423         retval = ftdi_read_pcimem(ftdi, periodicstart, &periodicstart);
2424         if (retval)
2425                 return retval;
2426         if (0 == (fminterval & 0x3fff0000) || 0 == periodicstart) {
2427                 if (!(quirk & OHCI_QUIRK_INITRESET)) {
2428                         quirk |= OHCI_QUIRK_INITRESET;
2429                         goto retry;
2430                 } else
2431                         dev_err(&ftdi->udev->dev, "init err(%08x %04x)\n",
2432                                 fminterval, periodicstart);
2433         }                        /* start controller operations */
2434         hc_control &= OHCI_CTRL_RWC;
2435         hc_control |= OHCI_CONTROL_INIT | OHCI_CTRL_BLE | OHCI_USB_OPER;
2436         retval = ftdi_write_pcimem(ftdi, control, hc_control);
2437         if (retval)
2438                 return retval;
2439         retval = ftdi_write_pcimem(ftdi, cmdstatus, OHCI_BLF);
2440         if (retval)
2441                 return retval;
2442         retval = ftdi_read_pcimem(ftdi, cmdstatus, &cmdstatus);
2443         if (retval)
2444                 return retval;
2445         retval = ftdi_read_pcimem(ftdi, control, &control);
2446         if (retval)
2447                 return retval;
2448         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_DRWE);
2449         if (retval)
2450                 return retval;
2451         retval = ftdi_write_pcimem(ftdi, intrstatus, mask);
2452         if (retval)
2453                 return retval;
2454         retval = ftdi_write_pcimem(ftdi, intrdisable,
2455                 OHCI_INTR_MIE | OHCI_INTR_OC | OHCI_INTR_RHSC | OHCI_INTR_FNO |
2456                 OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_SF | OHCI_INTR_WDH |
2457                 OHCI_INTR_SO);
2458         if (retval)
2459                 return retval;        /* handle root hub init quirks ... */
2460         retval = ftdi_read_pcimem(ftdi, roothub.a, &roothub_a);
2461         if (retval)
2462                 return retval;
2463         roothub_a &= ~(RH_A_PSM | RH_A_OCPM);
2464         if (quirk & OHCI_QUIRK_SUPERIO) {
2465                 roothub_a |= RH_A_NOCP;
2466                 roothub_a &= ~(RH_A_POTPGT | RH_A_NPS);
2467                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2468                 if (retval)
2469                         return retval;
2470         } else if ((quirk & OHCI_QUIRK_AMD756) || distrust_firmware) {
2471                 roothub_a |= RH_A_NPS;
2472                 retval = ftdi_write_pcimem(ftdi, roothub.a, roothub_a);
2473                 if (retval)
2474                         return retval;
2475         }
2476         retval = ftdi_write_pcimem(ftdi, roothub.status, RH_HS_LPSC);
2477         if (retval)
2478                 return retval;
2479         retval = ftdi_write_pcimem(ftdi, roothub.b,
2480                 (roothub_a & RH_A_NPS) ? 0 : RH_B_PPCM);
2481         if (retval)
2482                 return retval;
2483         retval = ftdi_read_pcimem(ftdi, control, &control);
2484         if (retval)
2485                 return retval;
2486         mdelay((roothub_a >> 23) & 0x1fe);
2487         for (temp = 0; temp < num_ports; temp++) {
2488                 u32 portstatus;
2489                 retval = ftdi_read_pcimem(ftdi, roothub.portstatus[temp],
2490                         &portstatus);
2491                 if (retval)
2492                         return retval;
2493                 if (1 & portstatus)
2494                         devices += 1;
2495         }
2496         return devices;
2497 }
2498
2499 static int ftdi_elan_setup_controller(struct usb_ftdi *ftdi, int fn)
2500 {
2501         u32 latence_timer;
2502         int UxxxStatus;
2503         u32 pcidata;
2504         int reg = 0;
2505         int activePCIfn = fn << 8;
2506         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2507         if (UxxxStatus)
2508                 return UxxxStatus;
2509         reg = 16;
2510         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2511                 0xFFFFFFFF);
2512         if (UxxxStatus)
2513                 return UxxxStatus;
2514         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2515                 &pcidata);
2516         if (UxxxStatus)
2517                 return UxxxStatus;
2518         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2519                 0xF0000000);
2520         if (UxxxStatus)
2521                 return UxxxStatus;
2522         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2523                 &pcidata);
2524         if (UxxxStatus)
2525                 return UxxxStatus;
2526         reg = 12;
2527         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2528                 &latence_timer);
2529         if (UxxxStatus)
2530                 return UxxxStatus;
2531         latence_timer &= 0xFFFF00FF;
2532         latence_timer |= 0x00001600;
2533         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2534                 latence_timer);
2535         if (UxxxStatus)
2536                 return UxxxStatus;
2537         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2538                 &pcidata);
2539         if (UxxxStatus)
2540                 return UxxxStatus;
2541         reg = 4;
2542         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2543                 0x06);
2544         if (UxxxStatus)
2545                 return UxxxStatus;
2546         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2547                 &pcidata);
2548         if (UxxxStatus)
2549                 return UxxxStatus;
2550         for (reg = 0; reg <= 0x54; reg += 4) {
2551                 UxxxStatus = ftdi_elan_read_pcimem(ftdi, reg, 0, &pcidata);
2552                 if (UxxxStatus)
2553                         return UxxxStatus;
2554         }
2555         return 0;
2556 }
2557
2558 static int ftdi_elan_close_controller(struct usb_ftdi *ftdi, int fn)
2559 {
2560         u32 latence_timer;
2561         int UxxxStatus;
2562         u32 pcidata;
2563         int reg = 0;
2564         int activePCIfn = fn << 8;
2565         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x2800);
2566         if (UxxxStatus)
2567                 return UxxxStatus;
2568         reg = 16;
2569         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2570                 0xFFFFFFFF);
2571         if (UxxxStatus)
2572                 return UxxxStatus;
2573         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2574                 &pcidata);
2575         if (UxxxStatus)
2576                 return UxxxStatus;
2577         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0,
2578                 0x00000000);
2579         if (UxxxStatus)
2580                 return UxxxStatus;
2581         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2582                 &pcidata);
2583         if (UxxxStatus)
2584                 return UxxxStatus;
2585         reg = 12;
2586         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2587                 &latence_timer);
2588         if (UxxxStatus)
2589                 return UxxxStatus;
2590         latence_timer &= 0xFFFF00FF;
2591         latence_timer |= 0x00001600;
2592         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2593                 latence_timer);
2594         if (UxxxStatus)
2595                 return UxxxStatus;
2596         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2597                 &pcidata);
2598         if (UxxxStatus)
2599                 return UxxxStatus;
2600         reg = 4;
2601         UxxxStatus = ftdi_elan_write_config(ftdi, activePCIfn | reg, 0x00,
2602                 0x00);
2603         if (UxxxStatus)
2604                 return UxxxStatus;
2605         UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2606                 &pcidata);
2607         if (UxxxStatus)
2608                 return UxxxStatus;
2609         return 0;
2610 }
2611
2612 static int ftdi_elan_found_controller(struct usb_ftdi *ftdi, int fn, int quirk)
2613 {
2614         int result;
2615         int UxxxStatus;
2616         UxxxStatus = ftdi_elan_setup_controller(ftdi, fn);
2617         if (UxxxStatus)
2618                 return UxxxStatus;
2619         result = ftdi_elan_check_controller(ftdi, quirk);
2620         UxxxStatus = ftdi_elan_close_controller(ftdi, fn);
2621         if (UxxxStatus)
2622                 return UxxxStatus;
2623         return result;
2624 }
2625
2626 static int ftdi_elan_enumeratePCI(struct usb_ftdi *ftdi)
2627 {
2628         u32 controlreg;
2629         u8 sensebits;
2630         int UxxxStatus;
2631         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2632         if (UxxxStatus)
2633                 return UxxxStatus;
2634         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000000L);
2635         if (UxxxStatus)
2636                 return UxxxStatus;
2637         msleep(750);
2638         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x100);
2639         if (UxxxStatus)
2640                 return UxxxStatus;
2641         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x00000200L | 0x500);
2642         if (UxxxStatus)
2643                 return UxxxStatus;
2644         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2645         if (UxxxStatus)
2646                 return UxxxStatus;
2647         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020CL | 0x000);
2648         if (UxxxStatus)
2649                 return UxxxStatus;
2650         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020DL | 0x000);
2651         if (UxxxStatus)
2652                 return UxxxStatus;
2653         msleep(250);
2654         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000020FL | 0x000);
2655         if (UxxxStatus)
2656                 return UxxxStatus;
2657         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2658         if (UxxxStatus)
2659                 return UxxxStatus;
2660         UxxxStatus = ftdi_elan_write_reg(ftdi, 0x0000025FL | 0x800);
2661         if (UxxxStatus)
2662                 return UxxxStatus;
2663         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2664         if (UxxxStatus)
2665                 return UxxxStatus;
2666         UxxxStatus = ftdi_elan_read_reg(ftdi, &controlreg);
2667         if (UxxxStatus)
2668                 return UxxxStatus;
2669         msleep(1000);
2670         sensebits = (controlreg >> 16) & 0x000F;
2671         if (0x0D == sensebits)
2672                 return 0;
2673         else
2674                 return - ENXIO;
2675 }
2676
2677 static int ftdi_elan_setupOHCI(struct usb_ftdi *ftdi)
2678 {
2679         int UxxxStatus;
2680         u32 pcidata;
2681         int reg = 0;
2682         u8 fn;
2683         int activePCIfn = 0;
2684         int max_devices = 0;
2685         int controllers = 0;
2686         int unrecognized = 0;
2687         ftdi->function = 0;
2688         for (fn = 0; (fn < 4); fn++) {
2689                 u32 pciVID = 0;
2690                 u32 pciPID = 0;
2691                 int devices = 0;
2692                 activePCIfn = fn << 8;
2693                 UxxxStatus = ftdi_elan_read_config(ftdi, activePCIfn | reg, 0,
2694                         &pcidata);
2695                 if (UxxxStatus)
2696                         return UxxxStatus;
2697                 pciVID = pcidata & 0xFFFF;
2698                 pciPID = (pcidata >> 16) & 0xFFFF;
2699                 if ((pciVID == PCI_VENDOR_ID_OPTI) && (pciPID == 0xc861)) {
2700                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2701                         controllers += 1;
2702                 } else if ((pciVID == PCI_VENDOR_ID_NEC) && (pciPID == 0x0035))
2703                         {
2704                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2705                         controllers += 1;
2706                 } else if ((pciVID == PCI_VENDOR_ID_AL) && (pciPID == 0x5237)) {
2707                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2708                         controllers += 1;
2709                 } else if ((pciVID == PCI_VENDOR_ID_ATT) && (pciPID == 0x5802))
2710                         {
2711                         devices = ftdi_elan_found_controller(ftdi, fn, 0);
2712                         controllers += 1;
2713                 } else if (pciVID == PCI_VENDOR_ID_AMD && pciPID == 0x740c) {
2714                         devices = ftdi_elan_found_controller(ftdi, fn,
2715                                 OHCI_QUIRK_AMD756);
2716                         controllers += 1;
2717                 } else if (pciVID == PCI_VENDOR_ID_COMPAQ && pciPID == 0xa0f8) {
2718                         devices = ftdi_elan_found_controller(ftdi, fn,
2719                                 OHCI_QUIRK_ZFMICRO);
2720                         controllers += 1;
2721                 } else if (0 == pcidata) {
2722                 } else
2723                         unrecognized += 1;
2724                 if (devices > max_devices) {
2725                         max_devices = devices;
2726                         ftdi->function = fn + 1;
2727                         ftdi->platform_data.vendor = pciVID;
2728                         ftdi->platform_data.device = pciPID;
2729                 }
2730         }
2731         if (ftdi->function > 0) {
2732                 UxxxStatus = ftdi_elan_setup_controller(ftdi,
2733                         ftdi->function - 1);
2734                 if (UxxxStatus)
2735                         return UxxxStatus;
2736                 return 0;
2737         } else if (controllers > 0) {
2738                 return -ENXIO;
2739         } else if (unrecognized > 0) {
2740                 return -ENXIO;
2741         } else {
2742                 ftdi->enumerated = 0;
2743                 return -ENXIO;
2744         }
2745 }
2746
2747
2748 /*
2749 * we use only the first bulk-in and bulk-out endpoints
2750 */
2751 static int ftdi_elan_probe(struct usb_interface *interface,
2752         const struct usb_device_id *id)
2753 {
2754         struct usb_host_interface *iface_desc;
2755         struct usb_endpoint_descriptor *endpoint;
2756         size_t buffer_size;
2757         int i;
2758         int retval = -ENOMEM;
2759         struct usb_ftdi *ftdi;
2760
2761         ftdi = kzalloc(sizeof(struct usb_ftdi), GFP_KERNEL);
2762         if (!ftdi) {
2763                 printk(KERN_ERR "Out of memory\n");
2764                 return -ENOMEM;
2765         }
2766
2767         mutex_lock(&ftdi_module_lock);
2768         list_add_tail(&ftdi->ftdi_list, &ftdi_static_list);
2769         ftdi->sequence_num = ++ftdi_instances;
2770         mutex_unlock(&ftdi_module_lock);
2771         ftdi_elan_init_kref(ftdi);
2772         init_MUTEX(&ftdi->sw_lock);
2773         ftdi->udev = usb_get_dev(interface_to_usbdev(interface));
2774         ftdi->interface = interface;
2775         mutex_init(&ftdi->u132_lock);
2776         ftdi->expected = 4;
2777         iface_desc = interface->cur_altsetting;
2778         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2779                 endpoint = &iface_desc->endpoint[i].desc;
2780                 if (!ftdi->bulk_in_endpointAddr &&
2781                     usb_endpoint_is_bulk_in(endpoint)) {
2782                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2783                         ftdi->bulk_in_size = buffer_size;
2784                         ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
2785                         ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2786                         if (!ftdi->bulk_in_buffer) {
2787                                 dev_err(&ftdi->udev->dev, "Could not allocate b"
2788                                         "ulk_in_buffer\n");
2789                                 retval = -ENOMEM;
2790                                 goto error;
2791                         }
2792                 }
2793                 if (!ftdi->bulk_out_endpointAddr &&
2794                     usb_endpoint_is_bulk_out(endpoint)) {
2795                         ftdi->bulk_out_endpointAddr =
2796                                 endpoint->bEndpointAddress;
2797                 }
2798         }
2799         if (!(ftdi->bulk_in_endpointAddr && ftdi->bulk_out_endpointAddr)) {
2800                 dev_err(&ftdi->udev->dev, "Could not find both bulk-in and bulk"
2801                         "-out endpoints\n");
2802                 retval = -ENODEV;
2803                 goto error;
2804         }
2805         dev_info(&ftdi->udev->dev, "interface %d has I=%02X O=%02X\n",
2806                 iface_desc->desc.bInterfaceNumber, ftdi->bulk_in_endpointAddr,
2807                 ftdi->bulk_out_endpointAddr);
2808         usb_set_intfdata(interface, ftdi);
2809         if (iface_desc->desc.bInterfaceNumber == 0 &&
2810                 ftdi->bulk_in_endpointAddr == 0x81 &&
2811                 ftdi->bulk_out_endpointAddr == 0x02) {
2812                 retval = usb_register_dev(interface, &ftdi_elan_jtag_class);
2813                 if (retval) {
2814                         dev_err(&ftdi->udev->dev, "Not able to get a minor for "
2815                                 "this device.\n");
2816                         usb_set_intfdata(interface, NULL);
2817                         retval = -ENOMEM;
2818                         goto error;
2819                 } else {
2820                         ftdi->class = &ftdi_elan_jtag_class;
2821                         dev_info(&ftdi->udev->dev, "USB FDTI=%p JTAG interface "
2822                                 "%d now attached to ftdi%d\n", ftdi,
2823                                 iface_desc->desc.bInterfaceNumber,
2824                                 interface->minor);
2825                         return 0;
2826                 }
2827         } else if (iface_desc->desc.bInterfaceNumber == 1 &&
2828                 ftdi->bulk_in_endpointAddr == 0x83 &&
2829                 ftdi->bulk_out_endpointAddr == 0x04) {
2830                 ftdi->class = NULL;
2831                 dev_info(&ftdi->udev->dev, "USB FDTI=%p ELAN interface %d now a"
2832                         "ctivated\n", ftdi, iface_desc->desc.bInterfaceNumber);
2833                 INIT_DELAYED_WORK(&ftdi->status_work, ftdi_elan_status_work);
2834                 INIT_DELAYED_WORK(&ftdi->command_work, ftdi_elan_command_work);
2835                 INIT_DELAYED_WORK(&ftdi->respond_work, ftdi_elan_respond_work);
2836                 ftdi_status_queue_work(ftdi, msecs_to_jiffies(3 *1000));
2837                 return 0;
2838         } else {
2839                 dev_err(&ftdi->udev->dev,
2840                         "Could not find ELAN's U132 device\n");
2841                 retval = -ENODEV;
2842                 goto error;
2843         }
2844       error:if (ftdi) {
2845                 ftdi_elan_put_kref(ftdi);
2846         }
2847         return retval;
2848 }
2849
2850 static void ftdi_elan_disconnect(struct usb_interface *interface)
2851 {
2852         struct usb_ftdi *ftdi = usb_get_intfdata(interface);
2853         ftdi->disconnected += 1;
2854         if (ftdi->class) {
2855                 int minor = interface->minor;
2856                 struct usb_class_driver *class = ftdi->class;
2857                 usb_set_intfdata(interface, NULL);
2858                 usb_deregister_dev(interface, class);
2859                 dev_info(&ftdi->udev->dev, "USB FTDI U132 jtag interface on min"
2860                         "or %d now disconnected\n", minor);
2861         } else {
2862                 ftdi_status_cancel_work(ftdi);
2863                 ftdi_command_cancel_work(ftdi);
2864                 ftdi_response_cancel_work(ftdi);
2865                 ftdi_elan_abandon_completions(ftdi);
2866                 ftdi_elan_abandon_targets(ftdi);
2867                 if (ftdi->registered) {
2868                         platform_device_unregister(&ftdi->platform_dev);
2869                         ftdi->synchronized = 0;
2870                         ftdi->enumerated = 0;
2871                         ftdi->initialized = 0;
2872                         ftdi->registered = 0;
2873                 }
2874                 flush_workqueue(status_queue);
2875                 flush_workqueue(command_queue);
2876                 flush_workqueue(respond_queue);
2877                 ftdi->disconnected += 1;
2878                 usb_set_intfdata(interface, NULL);
2879                 dev_info(&ftdi->udev->dev, "USB FTDI U132 host controller inter"
2880                         "face now disconnected\n");
2881         }
2882         ftdi_elan_put_kref(ftdi);
2883 }
2884
2885 static struct usb_driver ftdi_elan_driver = {
2886         .name = "ftdi-elan",
2887         .probe = ftdi_elan_probe,
2888         .disconnect = ftdi_elan_disconnect,
2889         .id_table = ftdi_elan_table,
2890 };
2891 static int __init ftdi_elan_init(void)
2892 {
2893         int result;
2894         printk(KERN_INFO "driver %s built at %s on %s\n", ftdi_elan_driver.name,
2895                __TIME__, __DATE__);
2896         mutex_init(&ftdi_module_lock);
2897         INIT_LIST_HEAD(&ftdi_static_list);
2898         status_queue = create_singlethread_workqueue("ftdi-status-control");
2899         if (!status_queue)
2900                 goto err_status_queue;
2901         command_queue = create_singlethread_workqueue("ftdi-command-engine");
2902         if (!command_queue)
2903                 goto err_command_queue;
2904         respond_queue = create_singlethread_workqueue("ftdi-respond-engine");
2905         if (!respond_queue)
2906                 goto err_respond_queue;
2907         result = usb_register(&ftdi_elan_driver);
2908         if (result) {
2909                 destroy_workqueue(status_queue);
2910                 destroy_workqueue(command_queue);
2911                 destroy_workqueue(respond_queue);
2912                 printk(KERN_ERR "usb_register failed. Error number %d\n",
2913                        result);
2914         }
2915         return result;
2916
2917  err_respond_queue:
2918         destroy_workqueue(command_queue);
2919  err_command_queue:
2920         destroy_workqueue(status_queue);
2921  err_status_queue:
2922         printk(KERN_ERR "%s couldn't create workqueue\n", ftdi_elan_driver.name);
2923         return -ENOMEM;
2924 }
2925
2926 static void __exit ftdi_elan_exit(void)
2927 {
2928         struct usb_ftdi *ftdi;
2929         struct usb_ftdi *temp;
2930         usb_deregister(&ftdi_elan_driver);
2931         printk(KERN_INFO "ftdi_u132 driver deregistered\n");
2932         list_for_each_entry_safe(ftdi, temp, &ftdi_static_list, ftdi_list) {
2933                 ftdi_status_cancel_work(ftdi);
2934                 ftdi_command_cancel_work(ftdi);
2935                 ftdi_response_cancel_work(ftdi);
2936         } flush_workqueue(status_queue);
2937         destroy_workqueue(status_queue);
2938         status_queue = NULL;
2939         flush_workqueue(command_queue);
2940         destroy_workqueue(command_queue);
2941         command_queue = NULL;
2942         flush_workqueue(respond_queue);
2943         destroy_workqueue(respond_queue);
2944         respond_queue = NULL;
2945 }
2946
2947
2948 module_init(ftdi_elan_init);
2949 module_exit(ftdi_elan_exit);