drivers/media/dvb-core/dvb_frontend.c

   1 /*
   2  * dvb_frontend.c: DVB frontend tuning interface/thread
   3  *
   4  *
   5  * Copyright (C) 1999-2001 Ralph  Metzler
   6  *                         Marcus Metzler
   7  *                         Holger Waechtler
   8  *                                    for convergence integrated media GmbH
   9  *
  10  * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  * To obtain the license, point your browser to
  22  * http://www.gnu.org/copyleft/gpl.html
  23  */
  24
  25 /* Enables DVBv3 compatibility bits at the headers */
  26 #define __DVB_CORE__
  27
  28 #define pr_fmt(fmt) "dvb_frontend: " fmt
  29
  30 #include <linux/string.h>
  31 #include <linux/kernel.h>
  32 #include <linux/sched/signal.h>
  33 #include <linux/wait.h>
  34 #include <linux/slab.h>
  35 #include <linux/poll.h>
  36 #include <linux/semaphore.h>
  37 #include <linux/module.h>
  38 #include <linux/list.h>
  39 #include <linux/freezer.h>
  40 #include <linux/jiffies.h>
  41 #include <linux/kthread.h>
  42 #include <linux/ktime.h>
  43 #include <asm/processor.h>
  44
  45 #include "dvb_frontend.h"
  46 #include "dvbdev.h"
  47 #include <linux/dvb/version.h>
  48
  49 static int dvb_frontend_debug;
  50 static int dvb_shutdown_timeout;
  51 static int dvb_force_auto_inversion;
  52 static int dvb_override_tune_delay;
  53 static int dvb_powerdown_on_sleep = 1;
  54 static int dvb_mfe_wait_time = 5;
  55
  56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  58 module_param(dvb_shutdown_timeout, int, 0644);
  59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  60 module_param(dvb_force_auto_inversion, int, 0644);
  61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  62 module_param(dvb_override_tune_delay, int, 0644);
  63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  64 module_param(dvb_powerdown_on_sleep, int, 0644);
  65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  66 module_param(dvb_mfe_wait_time, int, 0644);
  67 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
  68
  69 #define dprintk(fmt, arg...) \
  70         printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
  71
  72 #define FESTATE_IDLE 1
  73 #define FESTATE_RETUNE 2
  74 #define FESTATE_TUNING_FAST 4
  75 #define FESTATE_TUNING_SLOW 8
  76 #define FESTATE_TUNED 16
  77 #define FESTATE_ZIGZAG_FAST 32
  78 #define FESTATE_ZIGZAG_SLOW 64
  79 #define FESTATE_DISEQC 128
  80 #define FESTATE_ERROR 256
  81 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  82 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  83 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  84 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  85
  86 /*
  87  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  88  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  89  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  90  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  91  * FESTATE_TUNED. The frontend has successfully locked on.
  92  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  93  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  94  * FESTATE_DISEQC. A DISEQC command has just been issued.
  95  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  96  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  97  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  98  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  99  */
 100
 101 static DEFINE_MUTEX(frontend_mutex);
 102
 103 struct dvb_frontend_private {
 104         /* thread/frontend values */
 105         struct dvb_device *dvbdev;
 106         struct dvb_frontend_parameters parameters_out;
 107         struct dvb_fe_events events;
 108         struct semaphore sem;
 109         struct list_head list_head;
 110         wait_queue_head_t wait_queue;
 111         struct task_struct *thread;
 112         unsigned long release_jiffies;
 113         unsigned int wakeup;
 114         enum fe_status status;
 115         unsigned long tune_mode_flags;
 116         unsigned int delay;
 117         unsigned int reinitialise;
 118         int tone;
 119         int voltage;
 120
 121         /* swzigzag values */
 122         unsigned int state;
 123         unsigned int bending;
 124         int lnb_drift;
 125         unsigned int inversion;
 126         unsigned int auto_step;
 127         unsigned int auto_sub_step;
 128         unsigned int started_auto_step;
 129         unsigned int min_delay;
 130         unsigned int max_drift;
 131         unsigned int step_size;
 132         int quality;
 133         unsigned int check_wrapped;
 134         enum dvbfe_search algo_status;
 135
 136 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
 137         struct media_pipeline pipe;
 138 #endif
 139 };
 140
 141 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
 142                                         void (*release)(struct dvb_frontend *fe));
 143
 144 static void dvb_frontend_free(struct kref *ref)
 145 {
 146         struct dvb_frontend *fe =
 147                 container_of(ref, struct dvb_frontend, refcount);
 148         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 149
 150         dvb_free_device(fepriv->dvbdev);
 151
 152         dvb_frontend_invoke_release(fe, fe->ops.release);
 153
 154         kfree(fepriv);
 155 }
 156
 157 static void dvb_frontend_put(struct dvb_frontend *fe)
 158 {
 159         kref_put(&fe->refcount, dvb_frontend_free);
 160 }
 161
 162 static void dvb_frontend_get(struct dvb_frontend *fe)
 163 {
 164         kref_get(&fe->refcount);
 165 }
 166
 167 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 168 static int dtv_get_frontend(struct dvb_frontend *fe,
 169                             struct dtv_frontend_properties *c,
 170                             struct dvb_frontend_parameters *p_out);
 171 static int
 172 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 173                                 const struct dtv_frontend_properties *c,
 174                                 struct dvb_frontend_parameters *p);
 175
 176 static bool has_get_frontend(struct dvb_frontend *fe)
 177 {
 178         return fe->ops.get_frontend != NULL;
 179 }
 180
 181 /*
 182  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 183  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 184  * otherwise, a DVBv3 call will fail.
 185  */
 186 enum dvbv3_emulation_type {
 187         DVBV3_UNKNOWN,
 188         DVBV3_QPSK,
 189         DVBV3_QAM,
 190         DVBV3_OFDM,
 191         DVBV3_ATSC,
 192 };
 193
 194 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 195 {
 196         switch (delivery_system) {
 197         case SYS_DVBC_ANNEX_A:
 198         case SYS_DVBC_ANNEX_C:
 199                 return DVBV3_QAM;
 200         case SYS_DVBS:
 201         case SYS_DVBS2:
 202         case SYS_TURBO:
 203         case SYS_ISDBS:
 204         case SYS_DSS:
 205                 return DVBV3_QPSK;
 206         case SYS_DVBT:
 207         case SYS_DVBT2:
 208         case SYS_ISDBT:
 209         case SYS_DTMB:
 210                 return DVBV3_OFDM;
 211         case SYS_ATSC:
 212         case SYS_ATSCMH:
 213         case SYS_DVBC_ANNEX_B:
 214                 return DVBV3_ATSC;
 215         case SYS_UNDEFINED:
 216         case SYS_ISDBC:
 217         case SYS_DVBH:
 218         case SYS_DAB:
 219         default:
 220                 /*
 221                  * Doesn't know how to emulate those types and/or
 222                  * there's no frontend driver from this type yet
 223                  * with some emulation code, so, we're not sure yet how
 224                  * to handle them, or they're not compatible with a DVBv3 call.
 225                  */
 226                 return DVBV3_UNKNOWN;
 227         }
 228 }
 229
 230 static void dvb_frontend_add_event(struct dvb_frontend *fe,
 231                                    enum fe_status status)
 232 {
 233         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 234         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 235         struct dvb_fe_events *events = &fepriv->events;
 236         struct dvb_frontend_event *e;
 237         int wp;
 238
 239         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 240
 241         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 242                 dtv_get_frontend(fe, c, &fepriv->parameters_out);
 243
 244         mutex_lock(&events->mtx);
 245
 246         wp = (events->eventw + 1) % MAX_EVENT;
 247         if (wp == events->eventr) {
 248                 events->overflow = 1;
 249                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 250         }
 251
 252         e = &events->events[events->eventw];
 253         e->status = status;
 254         e->parameters = fepriv->parameters_out;
 255
 256         events->eventw = wp;
 257
 258         mutex_unlock(&events->mtx);
 259
 260         wake_up_interruptible (&events->wait_queue);
 261 }
 262
 263 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 264                             struct dvb_frontend_event *event, int flags)
 265 {
 266         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 267         struct dvb_fe_events *events = &fepriv->events;
 268
 269         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 270
 271         if (events->overflow) {
 272                 events->overflow = 0;
 273                 return -EOVERFLOW;
 274         }
 275
 276         if (events->eventw == events->eventr) {
 277                 int ret;
 278
 279                 if (flags & O_NONBLOCK)
 280                         return -EWOULDBLOCK;
 281
 282                 up(&fepriv->sem);
 283
 284                 ret = wait_event_interruptible (events->wait_queue,
 285                                                 events->eventw != events->eventr);
 286
 287                 if (down_interruptible (&fepriv->sem))
 288                         return -ERESTARTSYS;
 289
 290                 if (ret < 0)
 291                         return ret;
 292         }
 293
 294         mutex_lock(&events->mtx);
 295         *event = events->events[events->eventr];
 296         events->eventr = (events->eventr + 1) % MAX_EVENT;
 297         mutex_unlock(&events->mtx);
 298
 299         return 0;
 300 }
 301
 302 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 303 {
 304         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 305         struct dvb_fe_events *events = &fepriv->events;
 306
 307         mutex_lock(&events->mtx);
 308         events->eventr = events->eventw;
 309         mutex_unlock(&events->mtx);
 310 }
 311
 312 static void dvb_frontend_init(struct dvb_frontend *fe)
 313 {
 314         dev_dbg(fe->dvb->device,
 315                         "%s: initialising adapter %i frontend %i (%s)...\n",
 316                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 317
 318         if (fe->ops.init)
 319                 fe->ops.init(fe);
 320         if (fe->ops.tuner_ops.init) {
 321                 if (fe->ops.i2c_gate_ctrl)
 322                         fe->ops.i2c_gate_ctrl(fe, 1);
 323                 fe->ops.tuner_ops.init(fe);
 324                 if (fe->ops.i2c_gate_ctrl)
 325                         fe->ops.i2c_gate_ctrl(fe, 0);
 326         }
 327 }
 328
 329 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 330 {
 331         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 332
 333         fepriv->reinitialise = 1;
 334         dvb_frontend_wakeup(fe);
 335 }
 336 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 337
 338 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 339 {
 340         int q2;
 341         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 342
 343         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 344
 345         if (locked)
 346                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 347         else
 348                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 349
 350         q2 = fepriv->quality - 128;
 351         q2 *= q2;
 352
 353         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 354 }
 355
 356 /**
 357  * Performs automatic twiddling of frontend parameters.
 358  *
 359  * @param fe The frontend concerned.
 360  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 361  * @returns Number of complete iterations that have been performed.
 362  */
 363 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 364 {
 365         int autoinversion;
 366         int ready = 0;
 367         int fe_set_err = 0;
 368         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 369         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 370         int original_inversion = c->inversion;
 371         u32 original_frequency = c->frequency;
 372
 373         /* are we using autoinversion? */
 374         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 375                          (c->inversion == INVERSION_AUTO));
 376
 377         /* setup parameters correctly */
 378         while(!ready) {
 379                 /* calculate the lnb_drift */
 380                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 381
 382                 /* wrap the auto_step if we've exceeded the maximum drift */
 383                 if (fepriv->lnb_drift > fepriv->max_drift) {
 384                         fepriv->auto_step = 0;
 385                         fepriv->auto_sub_step = 0;
 386                         fepriv->lnb_drift = 0;
 387                 }
 388
 389                 /* perform inversion and +/- zigzag */
 390                 switch(fepriv->auto_sub_step) {
 391                 case 0:
 392                         /* try with the current inversion and current drift setting */
 393                         ready = 1;
 394                         break;
 395
 396                 case 1:
 397                         if (!autoinversion) break;
 398
 399                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 400                         ready = 1;
 401                         break;
 402
 403                 case 2:
 404                         if (fepriv->lnb_drift == 0) break;
 405
 406                         fepriv->lnb_drift = -fepriv->lnb_drift;
 407                         ready = 1;
 408                         break;
 409
 410                 case 3:
 411                         if (fepriv->lnb_drift == 0) break;
 412                         if (!autoinversion) break;
 413
 414                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 415                         fepriv->lnb_drift = -fepriv->lnb_drift;
 416                         ready = 1;
 417                         break;
 418
 419                 default:
 420                         fepriv->auto_step++;
 421                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 422                         break;
 423                 }
 424
 425                 if (!ready) fepriv->auto_sub_step++;
 426         }
 427
 428         /* if this attempt would hit where we started, indicate a complete
 429          * iteration has occurred */
 430         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 431             (fepriv->auto_sub_step == 0) && check_wrapped) {
 432                 return 1;
 433         }
 434
 435         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 436                         "auto_sub_step:%i started_auto_step:%i\n",
 437                         __func__, fepriv->lnb_drift, fepriv->inversion,
 438                         fepriv->auto_step, fepriv->auto_sub_step,
 439                         fepriv->started_auto_step);
 440
 441         /* set the frontend itself */
 442         c->frequency += fepriv->lnb_drift;
 443         if (autoinversion)
 444                 c->inversion = fepriv->inversion;
 445         tmp = *c;
 446         if (fe->ops.set_frontend)
 447                 fe_set_err = fe->ops.set_frontend(fe);
 448         *c = tmp;
 449         if (fe_set_err < 0) {
 450                 fepriv->state = FESTATE_ERROR;
 451                 return fe_set_err;
 452         }
 453
 454         c->frequency = original_frequency;
 455         c->inversion = original_inversion;
 456
 457         fepriv->auto_sub_step++;
 458         return 0;
 459 }
 460
 461 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 462 {
 463         enum fe_status s = FE_NONE;
 464         int retval = 0;
 465         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 466         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 467
 468         /* if we've got no parameters, just keep idling */
 469         if (fepriv->state & FESTATE_IDLE) {
 470                 fepriv->delay = 3*HZ;
 471                 fepriv->quality = 0;
 472                 return;
 473         }
 474
 475         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 476         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 477                 if (fepriv->state & FESTATE_RETUNE) {
 478                         tmp = *c;
 479                         if (fe->ops.set_frontend)
 480                                 retval = fe->ops.set_frontend(fe);
 481                         *c = tmp;
 482                         if (retval < 0)
 483                                 fepriv->state = FESTATE_ERROR;
 484                         else
 485                                 fepriv->state = FESTATE_TUNED;
 486                 }
 487                 fepriv->delay = 3*HZ;
 488                 fepriv->quality = 0;
 489                 return;
 490         }
 491
 492         /* get the frontend status */
 493         if (fepriv->state & FESTATE_RETUNE) {
 494                 s = 0;
 495         } else {
 496                 if (fe->ops.read_status)
 497                         fe->ops.read_status(fe, &s);
 498                 if (s != fepriv->status) {
 499                         dvb_frontend_add_event(fe, s);
 500                         fepriv->status = s;
 501                 }
 502         }
 503
 504         /* if we're not tuned, and we have a lock, move to the TUNED state */
 505         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 506                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 507                 fepriv->state = FESTATE_TUNED;
 508
 509                 /* if we're tuned, then we have determined the correct inversion */
 510                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 511                     (c->inversion == INVERSION_AUTO)) {
 512                         c->inversion = fepriv->inversion;
 513                 }
 514                 return;
 515         }
 516
 517         /* if we are tuned already, check we're still locked */
 518         if (fepriv->state & FESTATE_TUNED) {
 519                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 520
 521                 /* we're tuned, and the lock is still good... */
 522                 if (s & FE_HAS_LOCK) {
 523                         return;
 524                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 525                         fepriv->state = FESTATE_ZIGZAG_FAST;
 526                         fepriv->started_auto_step = fepriv->auto_step;
 527                         fepriv->check_wrapped = 0;
 528                 }
 529         }
 530
 531         /* don't actually do anything if we're in the LOSTLOCK state,
 532          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 533         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 534             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 535                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 536                 return;
 537         }
 538
 539         /* don't do anything if we're in the DISEQC state, since this
 540          * might be someone with a motorized dish controlled by DISEQC.
 541          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 542         if (fepriv->state & FESTATE_DISEQC) {
 543                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 544                 return;
 545         }
 546
 547         /* if we're in the RETUNE state, set everything up for a brand
 548          * new scan, keeping the current inversion setting, as the next
 549          * tune is _very_ likely to require the same */
 550         if (fepriv->state & FESTATE_RETUNE) {
 551                 fepriv->lnb_drift = 0;
 552                 fepriv->auto_step = 0;
 553                 fepriv->auto_sub_step = 0;
 554                 fepriv->started_auto_step = 0;
 555                 fepriv->check_wrapped = 0;
 556         }
 557
 558         /* fast zigzag. */
 559         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 560                 fepriv->delay = fepriv->min_delay;
 561
 562                 /* perform a tune */
 563                 retval = dvb_frontend_swzigzag_autotune(fe,
 564                                                         fepriv->check_wrapped);
 565                 if (retval < 0) {
 566                         return;
 567                 } else if (retval) {
 568                         /* OK, if we've run out of trials at the fast speed.
 569                          * Drop back to slow for the _next_ attempt */
 570                         fepriv->state = FESTATE_SEARCHING_SLOW;
 571                         fepriv->started_auto_step = fepriv->auto_step;
 572                         return;
 573                 }
 574                 fepriv->check_wrapped = 1;
 575
 576                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 577                  * This ensures we cannot return from an
 578                  * FE_SET_FRONTEND ioctl before the first frontend tune
 579                  * occurs */
 580                 if (fepriv->state & FESTATE_RETUNE) {
 581                         fepriv->state = FESTATE_TUNING_FAST;
 582                 }
 583         }
 584
 585         /* slow zigzag */
 586         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 587                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 588
 589                 /* Note: don't bother checking for wrapping; we stay in this
 590                  * state until we get a lock */
 591                 dvb_frontend_swzigzag_autotune(fe, 0);
 592         }
 593 }
 594
 595 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 596 {
 597         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 598
 599         if (fe->exit != DVB_FE_NO_EXIT)
 600                 return 1;
 601
 602         if (fepriv->dvbdev->writers == 1)
 603                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 604                                   dvb_shutdown_timeout * HZ))
 605                         return 1;
 606
 607         return 0;
 608 }
 609
 610 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 611 {
 612         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 613
 614         if (fepriv->wakeup) {
 615                 fepriv->wakeup = 0;
 616                 return 1;
 617         }
 618         return dvb_frontend_is_exiting(fe);
 619 }
 620
 621 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 622 {
 623         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 624
 625         fepriv->wakeup = 1;
 626         wake_up_interruptible(&fepriv->wait_queue);
 627 }
 628
 629 static int dvb_frontend_thread(void *data)
 630 {
 631         struct dvb_frontend *fe = data;
 632         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 633         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 634         enum fe_status s = FE_NONE;
 635         enum dvbfe_algo algo;
 636         bool re_tune = false;
 637         bool semheld = false;
 638
 639         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 640
 641         fepriv->check_wrapped = 0;
 642         fepriv->quality = 0;
 643         fepriv->delay = 3*HZ;
 644         fepriv->status = 0;
 645         fepriv->wakeup = 0;
 646         fepriv->reinitialise = 0;
 647
 648         dvb_frontend_init(fe);
 649
 650         set_freezable();
 651         while (1) {
 652                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 653 restart:
 654                 wait_event_interruptible_timeout(fepriv->wait_queue,
 655                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 656                                 || freezing(current),
 657                         fepriv->delay);
 658
 659                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 660                         /* got signal or quitting */
 661                         if (!down_interruptible(&fepriv->sem))
 662                                 semheld = true;
 663                         fe->exit = DVB_FE_NORMAL_EXIT;
 664                         break;
 665                 }
 666
 667                 if (try_to_freeze())
 668                         goto restart;
 669
 670                 if (down_interruptible(&fepriv->sem))
 671                         break;
 672
 673                 if (fepriv->reinitialise) {
 674                         dvb_frontend_init(fe);
 675                         if (fe->ops.set_tone && fepriv->tone != -1)
 676                                 fe->ops.set_tone(fe, fepriv->tone);
 677                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 678                                 fe->ops.set_voltage(fe, fepriv->voltage);
 679                         fepriv->reinitialise = 0;
 680                 }
 681
 682                 /* do an iteration of the tuning loop */
 683                 if (fe->ops.get_frontend_algo) {
 684                         algo = fe->ops.get_frontend_algo(fe);
 685                         switch (algo) {
 686                         case DVBFE_ALGO_HW:
 687                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 688
 689                                 if (fepriv->state & FESTATE_RETUNE) {
 690                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 691                                         re_tune = true;
 692                                         fepriv->state = FESTATE_TUNED;
 693                                 } else {
 694                                         re_tune = false;
 695                                 }
 696
 697                                 if (fe->ops.tune)
 698                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 699
 700                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 701                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 702                                         dvb_frontend_add_event(fe, s);
 703                                         fepriv->status = s;
 704                                 }
 705                                 break;
 706                         case DVBFE_ALGO_SW:
 707                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 708                                 dvb_frontend_swzigzag(fe);
 709                                 break;
 710                         case DVBFE_ALGO_CUSTOM:
 711                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 712                                 if (fepriv->state & FESTATE_RETUNE) {
 713                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 714                                         fepriv->state = FESTATE_TUNED;
 715                                 }
 716                                 /* Case where we are going to search for a carrier
 717                                  * User asked us to retune again for some reason, possibly
 718                                  * requesting a search with a new set of parameters
 719                                  */
 720                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 721                                         if (fe->ops.search) {
 722                                                 fepriv->algo_status = fe->ops.search(fe);
 723                                                 /* We did do a search as was requested, the flags are
 724                                                  * now unset as well and has the flags wrt to search.
 725                                                  */
 726                                         } else {
 727                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 728                                         }
 729                                 }
 730                                 /* Track the carrier if the search was successful */
 731                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 732                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 733                                         fepriv->delay = HZ / 2;
 734                                 }
 735                                 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
 736                                 fe->ops.read_status(fe, &s);
 737                                 if (s != fepriv->status) {
 738                                         dvb_frontend_add_event(fe, s); /* update event list */
 739                                         fepriv->status = s;
 740                                         if (!(s & FE_HAS_LOCK)) {
 741                                                 fepriv->delay = HZ / 10;
 742                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 743                                         } else {
 744                                                 fepriv->delay = 60 * HZ;
 745                                         }
 746                                 }
 747                                 break;
 748                         default:
 749                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 750                                 break;
 751                         }
 752                 } else {
 753                         dvb_frontend_swzigzag(fe);
 754                 }
 755         }
 756
 757         if (dvb_powerdown_on_sleep) {
 758                 if (fe->ops.set_voltage)
 759                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 760                 if (fe->ops.tuner_ops.sleep) {
 761                         if (fe->ops.i2c_gate_ctrl)
 762                                 fe->ops.i2c_gate_ctrl(fe, 1);
 763                         fe->ops.tuner_ops.sleep(fe);
 764                         if (fe->ops.i2c_gate_ctrl)
 765                                 fe->ops.i2c_gate_ctrl(fe, 0);
 766                 }
 767                 if (fe->ops.sleep)
 768                         fe->ops.sleep(fe);
 769         }
 770
 771         fepriv->thread = NULL;
 772         if (kthread_should_stop())
 773                 fe->exit = DVB_FE_DEVICE_REMOVED;
 774         else
 775                 fe->exit = DVB_FE_NO_EXIT;
 776         mb();
 777
 778         if (semheld)
 779                 up(&fepriv->sem);
 780         dvb_frontend_wakeup(fe);
 781         return 0;
 782 }
 783
 784 static void dvb_frontend_stop(struct dvb_frontend *fe)
 785 {
 786         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 787
 788         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 789
 790         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 791                 fe->exit = DVB_FE_NORMAL_EXIT;
 792         mb();
 793
 794         if (!fepriv->thread)
 795                 return;
 796
 797         kthread_stop(fepriv->thread);
 798
 799         sema_init(&fepriv->sem, 1);
 800         fepriv->state = FESTATE_IDLE;
 801
 802         /* paranoia check in case a signal arrived */
 803         if (fepriv->thread)
 804                 dev_warn(fe->dvb->device,
 805                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 806                                 fepriv->thread);
 807 }
 808
 809 /*
 810  * Sleep for the amount of time given by add_usec parameter
 811  *
 812  * This needs to be as precise as possible, as it affects the detection of
 813  * the dish tone command at the satellite subsystem. The precision is improved
 814  * by using a scheduled msleep followed by udelay for the remainder.
 815  */
 816 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
 817 {
 818         s32 delta;
 819
 820         *waketime = ktime_add_us(*waketime, add_usec);
 821         delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 822         if (delta > 2500) {
 823                 msleep((delta - 1500) / 1000);
 824                 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 825         }
 826         if (delta > 0)
 827                 udelay(delta);
 828 }
 829 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 830
 831 static int dvb_frontend_start(struct dvb_frontend *fe)
 832 {
 833         int ret;
 834         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 835         struct task_struct *fe_thread;
 836
 837         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 838
 839         if (fepriv->thread) {
 840                 if (fe->exit == DVB_FE_NO_EXIT)
 841                         return 0;
 842                 else
 843                         dvb_frontend_stop (fe);
 844         }
 845
 846         if (signal_pending(current))
 847                 return -EINTR;
 848         if (down_interruptible (&fepriv->sem))
 849                 return -EINTR;
 850
 851         fepriv->state = FESTATE_IDLE;
 852         fe->exit = DVB_FE_NO_EXIT;
 853         fepriv->thread = NULL;
 854         mb();
 855
 856         fe_thread = kthread_run(dvb_frontend_thread, fe,
 857                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 858         if (IS_ERR(fe_thread)) {
 859                 ret = PTR_ERR(fe_thread);
 860                 dev_warn(fe->dvb->device,
 861                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 862                                 ret);
 863                 up(&fepriv->sem);
 864                 return ret;
 865         }
 866         fepriv->thread = fe_thread;
 867         return 0;
 868 }
 869
 870 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 871                                         u32 *freq_min, u32 *freq_max)
 872 {
 873         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 874
 875         if (fe->ops.info.frequency_max == 0)
 876                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 877         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 878                 *freq_max = fe->ops.info.frequency_max;
 879         else
 880                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 881
 882         if (*freq_min == 0 || *freq_max == 0)
 883                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 884                                 fe->dvb->num, fe->id);
 885 }
 886
 887 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 888 {
 889         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 890         u32 freq_min;
 891         u32 freq_max;
 892
 893         /* range check: frequency */
 894         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 895         if ((freq_min && c->frequency < freq_min) ||
 896             (freq_max && c->frequency > freq_max)) {
 897                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 898                                 fe->dvb->num, fe->id, c->frequency,
 899                                 freq_min, freq_max);
 900                 return -EINVAL;
 901         }
 902
 903         /* range check: symbol rate */
 904         switch (c->delivery_system) {
 905         case SYS_DVBS:
 906         case SYS_DVBS2:
 907         case SYS_TURBO:
 908         case SYS_DVBC_ANNEX_A:
 909         case SYS_DVBC_ANNEX_C:
 910                 if ((fe->ops.info.symbol_rate_min &&
 911                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 912                     (fe->ops.info.symbol_rate_max &&
 913                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 914                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 915                                         fe->dvb->num, fe->id, c->symbol_rate,
 916                                         fe->ops.info.symbol_rate_min,
 917                                         fe->ops.info.symbol_rate_max);
 918                         return -EINVAL;
 919                 }
 920         default:
 921                 break;
 922         }
 923
 924         return 0;
 925 }
 926
 927 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 928 {
 929         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 930         int i;
 931         u32 delsys;
 932
 933         delsys = c->delivery_system;
 934         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
 935         c->delivery_system = delsys;
 936
 937         c->state = DTV_CLEAR;
 938
 939         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
 940                         __func__, c->delivery_system);
 941
 942         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 943         c->bandwidth_hz = 0;    /* AUTO */
 944         c->guard_interval = GUARD_INTERVAL_AUTO;
 945         c->hierarchy = HIERARCHY_AUTO;
 946         c->symbol_rate = 0;
 947         c->code_rate_HP = FEC_AUTO;
 948         c->code_rate_LP = FEC_AUTO;
 949         c->fec_inner = FEC_AUTO;
 950         c->rolloff = ROLLOFF_AUTO;
 951         c->voltage = SEC_VOLTAGE_OFF;
 952         c->sectone = SEC_TONE_OFF;
 953         c->pilot = PILOT_AUTO;
 954
 955         c->isdbt_partial_reception = 0;
 956         c->isdbt_sb_mode = 0;
 957         c->isdbt_sb_subchannel = 0;
 958         c->isdbt_sb_segment_idx = 0;
 959         c->isdbt_sb_segment_count = 0;
 960         c->isdbt_layer_enabled = 0;
 961         for (i = 0; i < 3; i++) {
 962                 c->layer[i].fec = FEC_AUTO;
 963                 c->layer[i].modulation = QAM_AUTO;
 964                 c->layer[i].interleaving = 0;
 965                 c->layer[i].segment_count = 0;
 966         }
 967
 968         c->stream_id = NO_STREAM_ID_FILTER;
 969
 970         switch (c->delivery_system) {
 971         case SYS_DVBS:
 972         case SYS_DVBS2:
 973         case SYS_TURBO:
 974                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 975                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 976                 break;
 977         case SYS_ATSC:
 978                 c->modulation = VSB_8;
 979                 break;
 980         case SYS_ISDBS:
 981                 c->symbol_rate = 28860000;
 982                 c->rolloff = ROLLOFF_35;
 983                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
 984                 break;
 985         default:
 986                 c->modulation = QAM_AUTO;
 987                 break;
 988         }
 989
 990         c->lna = LNA_AUTO;
 991
 992         return 0;
 993 }
 994
 995 #define _DTV_CMD(n, s, b) \
 996 [n] = { \
 997         .name = #n, \
 998         .cmd  = n, \
 999         .set  = s,\
1000         .buffer = b \
1001 }
1002
1003 struct dtv_cmds_h {
1004         char    *name;          /* A display name for debugging purposes */
1005
1006         __u32   cmd;            /* A unique ID */
1007
1008         /* Flags */
1009         __u32   set:1;          /* Either a set or get property */
1010         __u32   buffer:1;       /* Does this property use the buffer? */
1011         __u32   reserved:30;    /* Align */
1012 };
1013
1014 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1015         _DTV_CMD(DTV_TUNE, 1, 0),
1016         _DTV_CMD(DTV_CLEAR, 1, 0),
1017
1018         /* Set */
1019         _DTV_CMD(DTV_FREQUENCY, 1, 0),
1020         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1021         _DTV_CMD(DTV_MODULATION, 1, 0),
1022         _DTV_CMD(DTV_INVERSION, 1, 0),
1023         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1024         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1025         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1026         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1027         _DTV_CMD(DTV_TONE, 1, 0),
1028         _DTV_CMD(DTV_PILOT, 1, 0),
1029         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1030         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1031         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1032         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1033         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1034         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1035         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1036         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1037
1038         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1039         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1040         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1041         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1042         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1043         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1044         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1045         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1046         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1047         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1048         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1049         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1050         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1051         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1052         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1053         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1054         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1055         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1056
1057         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1058         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1059         _DTV_CMD(DTV_LNA, 1, 0),
1060
1061         /* Get */
1062         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1063         _DTV_CMD(DTV_API_VERSION, 0, 0),
1064
1065         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1066
1067         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1068         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1069
1070         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1071         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1072         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1073         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1074         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1075         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1076         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1077         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1078         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1079         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1080         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1081         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1082         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1083
1084         /* Statistics API */
1085         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1086         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1087         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1088         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1089         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1090         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1091         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1092         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1093 };
1094
1095 static void dtv_property_dump(struct dvb_frontend *fe,
1096                               bool is_set,
1097                               struct dtv_property *tvp)
1098 {
1099         int i;
1100
1101         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1102                 dev_warn(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x undefined\n",
1103                                 __func__,
1104                                 is_set ? "SET" : "GET",
1105                                 tvp->cmd);
1106                 return;
1107         }
1108
1109         dev_dbg(fe->dvb->device, "%s: %s tvp.cmd    = 0x%08x (%s)\n", __func__,
1110                 is_set ? "SET" : "GET",
1111                 tvp->cmd,
1112                 dtv_cmds[tvp->cmd].name);
1113
1114         if (dtv_cmds[tvp->cmd].buffer) {
1115                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1116                         __func__, tvp->u.buffer.len);
1117
1118                 for(i = 0; i < tvp->u.buffer.len; i++)
1119                         dev_dbg(fe->dvb->device,
1120                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1121                                         __func__, i, tvp->u.buffer.data[i]);
1122         } else {
1123                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1124                                 tvp->u.data);
1125         }
1126 }
1127
1128 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1129  * drivers can use a single set_frontend tuning function, regardless of whether
1130  * it's being used for the legacy or new API, reducing code and complexity.
1131  */
1132 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1133                                    struct dtv_frontend_properties *c,
1134                                    const struct dvb_frontend_parameters *p)
1135 {
1136         c->frequency = p->frequency;
1137         c->inversion = p->inversion;
1138
1139         switch (dvbv3_type(c->delivery_system)) {
1140         case DVBV3_QPSK:
1141                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1142                 c->symbol_rate = p->u.qpsk.symbol_rate;
1143                 c->fec_inner = p->u.qpsk.fec_inner;
1144                 break;
1145         case DVBV3_QAM:
1146                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1147                 c->symbol_rate = p->u.qam.symbol_rate;
1148                 c->fec_inner = p->u.qam.fec_inner;
1149                 c->modulation = p->u.qam.modulation;
1150                 break;
1151         case DVBV3_OFDM:
1152                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1153
1154                 switch (p->u.ofdm.bandwidth) {
1155                 case BANDWIDTH_10_MHZ:
1156                         c->bandwidth_hz = 10000000;
1157                         break;
1158                 case BANDWIDTH_8_MHZ:
1159                         c->bandwidth_hz = 8000000;
1160                         break;
1161                 case BANDWIDTH_7_MHZ:
1162                         c->bandwidth_hz = 7000000;
1163                         break;
1164                 case BANDWIDTH_6_MHZ:
1165                         c->bandwidth_hz = 6000000;
1166                         break;
1167                 case BANDWIDTH_5_MHZ:
1168                         c->bandwidth_hz = 5000000;
1169                         break;
1170                 case BANDWIDTH_1_712_MHZ:
1171                         c->bandwidth_hz = 1712000;
1172                         break;
1173                 case BANDWIDTH_AUTO:
1174                         c->bandwidth_hz = 0;
1175                 }
1176
1177                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1178                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1179                 c->modulation = p->u.ofdm.constellation;
1180                 c->transmission_mode = p->u.ofdm.transmission_mode;
1181                 c->guard_interval = p->u.ofdm.guard_interval;
1182                 c->hierarchy = p->u.ofdm.hierarchy_information;
1183                 break;
1184         case DVBV3_ATSC:
1185                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1186                 c->modulation = p->u.vsb.modulation;
1187                 if (c->delivery_system == SYS_ATSCMH)
1188                         break;
1189                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1190                         c->delivery_system = SYS_ATSC;
1191                 else
1192                         c->delivery_system = SYS_DVBC_ANNEX_B;
1193                 break;
1194         case DVBV3_UNKNOWN:
1195                 dev_err(fe->dvb->device,
1196                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1197                                 __func__, c->delivery_system);
1198                 return -EINVAL;
1199         }
1200
1201         return 0;
1202 }
1203
1204 /* Ensure the cached values are set correctly in the frontend
1205  * legacy tuning structures, for the advanced tuning API.
1206  */
1207 static int
1208 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1209                                 const struct dtv_frontend_properties *c,
1210                                 struct dvb_frontend_parameters *p)
1211 {
1212         p->frequency = c->frequency;
1213         p->inversion = c->inversion;
1214
1215         switch (dvbv3_type(c->delivery_system)) {
1216         case DVBV3_UNKNOWN:
1217                 dev_err(fe->dvb->device,
1218                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1219                                 __func__, c->delivery_system);
1220                 return -EINVAL;
1221         case DVBV3_QPSK:
1222                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1223                 p->u.qpsk.symbol_rate = c->symbol_rate;
1224                 p->u.qpsk.fec_inner = c->fec_inner;
1225                 break;
1226         case DVBV3_QAM:
1227                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1228                 p->u.qam.symbol_rate = c->symbol_rate;
1229                 p->u.qam.fec_inner = c->fec_inner;
1230                 p->u.qam.modulation = c->modulation;
1231                 break;
1232         case DVBV3_OFDM:
1233                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1234                 switch (c->bandwidth_hz) {
1235                 case 10000000:
1236                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1237                         break;
1238                 case 8000000:
1239                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1240                         break;
1241                 case 7000000:
1242                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1243                         break;
1244                 case 6000000:
1245                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1246                         break;
1247                 case 5000000:
1248                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1249                         break;
1250                 case 1712000:
1251                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1252                         break;
1253                 case 0:
1254                 default:
1255                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1256                 }
1257                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1258                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1259                 p->u.ofdm.constellation = c->modulation;
1260                 p->u.ofdm.transmission_mode = c->transmission_mode;
1261                 p->u.ofdm.guard_interval = c->guard_interval;
1262                 p->u.ofdm.hierarchy_information = c->hierarchy;
1263                 break;
1264         case DVBV3_ATSC:
1265                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1266                 p->u.vsb.modulation = c->modulation;
1267                 break;
1268         }
1269         return 0;
1270 }
1271
1272 /**
1273  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1274  * @fe:         struct dvb_frontend pointer
1275  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1276  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1277  *
1278  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1279  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1280  * If p_out is not null, it will update the DVBv3 params pointed by it.
1281  */
1282 static int dtv_get_frontend(struct dvb_frontend *fe,
1283                             struct dtv_frontend_properties *c,
1284                             struct dvb_frontend_parameters *p_out)
1285 {
1286         int r;
1287
1288         if (fe->ops.get_frontend) {
1289                 r = fe->ops.get_frontend(fe, c);
1290                 if (unlikely(r < 0))
1291                         return r;
1292                 if (p_out)
1293                         dtv_property_legacy_params_sync(fe, c, p_out);
1294                 return 0;
1295         }
1296
1297         /* As everything is in cache, get_frontend fops are always supported */
1298         return 0;
1299 }
1300
1301 static int dvb_frontend_ioctl_legacy(struct file *file,
1302                         unsigned int cmd, void *parg);
1303 static int dvb_frontend_ioctl_properties(struct file *file,
1304                         unsigned int cmd, void *parg);
1305
1306 static int dtv_property_process_get(struct dvb_frontend *fe,
1307                                     const struct dtv_frontend_properties *c,
1308                                     struct dtv_property *tvp,
1309                                     struct file *file)
1310 {
1311         int r, ncaps;
1312
1313         switch(tvp->cmd) {
1314         case DTV_ENUM_DELSYS:
1315                 ncaps = 0;
1316                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1317                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1318                         ncaps++;
1319                 }
1320                 tvp->u.buffer.len = ncaps;
1321                 break;
1322         case DTV_FREQUENCY:
1323                 tvp->u.data = c->frequency;
1324                 break;
1325         case DTV_MODULATION:
1326                 tvp->u.data = c->modulation;
1327                 break;
1328         case DTV_BANDWIDTH_HZ:
1329                 tvp->u.data = c->bandwidth_hz;
1330                 break;
1331         case DTV_INVERSION:
1332                 tvp->u.data = c->inversion;
1333                 break;
1334         case DTV_SYMBOL_RATE:
1335                 tvp->u.data = c->symbol_rate;
1336                 break;
1337         case DTV_INNER_FEC:
1338                 tvp->u.data = c->fec_inner;
1339                 break;
1340         case DTV_PILOT:
1341                 tvp->u.data = c->pilot;
1342                 break;
1343         case DTV_ROLLOFF:
1344                 tvp->u.data = c->rolloff;
1345                 break;
1346         case DTV_DELIVERY_SYSTEM:
1347                 tvp->u.data = c->delivery_system;
1348                 break;
1349         case DTV_VOLTAGE:
1350                 tvp->u.data = c->voltage;
1351                 break;
1352         case DTV_TONE:
1353                 tvp->u.data = c->sectone;
1354                 break;
1355         case DTV_API_VERSION:
1356                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1357                 break;
1358         case DTV_CODE_RATE_HP:
1359                 tvp->u.data = c->code_rate_HP;
1360                 break;
1361         case DTV_CODE_RATE_LP:
1362                 tvp->u.data = c->code_rate_LP;
1363                 break;
1364         case DTV_GUARD_INTERVAL:
1365                 tvp->u.data = c->guard_interval;
1366                 break;
1367         case DTV_TRANSMISSION_MODE:
1368                 tvp->u.data = c->transmission_mode;
1369                 break;
1370         case DTV_HIERARCHY:
1371                 tvp->u.data = c->hierarchy;
1372                 break;
1373         case DTV_INTERLEAVING:
1374                 tvp->u.data = c->interleaving;
1375                 break;
1376
1377         /* ISDB-T Support here */
1378         case DTV_ISDBT_PARTIAL_RECEPTION:
1379                 tvp->u.data = c->isdbt_partial_reception;
1380                 break;
1381         case DTV_ISDBT_SOUND_BROADCASTING:
1382                 tvp->u.data = c->isdbt_sb_mode;
1383                 break;
1384         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1385                 tvp->u.data = c->isdbt_sb_subchannel;
1386                 break;
1387         case DTV_ISDBT_SB_SEGMENT_IDX:
1388                 tvp->u.data = c->isdbt_sb_segment_idx;
1389                 break;
1390         case DTV_ISDBT_SB_SEGMENT_COUNT:
1391                 tvp->u.data = c->isdbt_sb_segment_count;
1392                 break;
1393         case DTV_ISDBT_LAYER_ENABLED:
1394                 tvp->u.data = c->isdbt_layer_enabled;
1395                 break;
1396         case DTV_ISDBT_LAYERA_FEC:
1397                 tvp->u.data = c->layer[0].fec;
1398                 break;
1399         case DTV_ISDBT_LAYERA_MODULATION:
1400                 tvp->u.data = c->layer[0].modulation;
1401                 break;
1402         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1403                 tvp->u.data = c->layer[0].segment_count;
1404                 break;
1405         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1406                 tvp->u.data = c->layer[0].interleaving;
1407                 break;
1408         case DTV_ISDBT_LAYERB_FEC:
1409                 tvp->u.data = c->layer[1].fec;
1410                 break;
1411         case DTV_ISDBT_LAYERB_MODULATION:
1412                 tvp->u.data = c->layer[1].modulation;
1413                 break;
1414         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1415                 tvp->u.data = c->layer[1].segment_count;
1416                 break;
1417         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1418                 tvp->u.data = c->layer[1].interleaving;
1419                 break;
1420         case DTV_ISDBT_LAYERC_FEC:
1421                 tvp->u.data = c->layer[2].fec;
1422                 break;
1423         case DTV_ISDBT_LAYERC_MODULATION:
1424                 tvp->u.data = c->layer[2].modulation;
1425                 break;
1426         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1427                 tvp->u.data = c->layer[2].segment_count;
1428                 break;
1429         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1430                 tvp->u.data = c->layer[2].interleaving;
1431                 break;
1432
1433         /* Multistream support */
1434         case DTV_STREAM_ID:
1435         case DTV_DVBT2_PLP_ID_LEGACY:
1436                 tvp->u.data = c->stream_id;
1437                 break;
1438
1439         /* ATSC-MH */
1440         case DTV_ATSCMH_FIC_VER:
1441                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1442                 break;
1443         case DTV_ATSCMH_PARADE_ID:
1444                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1445                 break;
1446         case DTV_ATSCMH_NOG:
1447                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1448                 break;
1449         case DTV_ATSCMH_TNOG:
1450                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1451                 break;
1452         case DTV_ATSCMH_SGN:
1453                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1454                 break;
1455         case DTV_ATSCMH_PRC:
1456                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1457                 break;
1458         case DTV_ATSCMH_RS_FRAME_MODE:
1459                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1460                 break;
1461         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1462                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1463                 break;
1464         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1465                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1466                 break;
1467         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1468                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1469                 break;
1470         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1471                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1472                 break;
1473         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1474                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1475                 break;
1476         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1477                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1478                 break;
1479         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1480                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1481                 break;
1482         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1483                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1484                 break;
1485
1486         case DTV_LNA:
1487                 tvp->u.data = c->lna;
1488                 break;
1489
1490         /* Fill quality measures */
1491         case DTV_STAT_SIGNAL_STRENGTH:
1492                 tvp->u.st = c->strength;
1493                 break;
1494         case DTV_STAT_CNR:
1495                 tvp->u.st = c->cnr;
1496                 break;
1497         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1498                 tvp->u.st = c->pre_bit_error;
1499                 break;
1500         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1501                 tvp->u.st = c->pre_bit_count;
1502                 break;
1503         case DTV_STAT_POST_ERROR_BIT_COUNT:
1504                 tvp->u.st = c->post_bit_error;
1505                 break;
1506         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1507                 tvp->u.st = c->post_bit_count;
1508                 break;
1509         case DTV_STAT_ERROR_BLOCK_COUNT:
1510                 tvp->u.st = c->block_error;
1511                 break;
1512         case DTV_STAT_TOTAL_BLOCK_COUNT:
1513                 tvp->u.st = c->block_count;
1514                 break;
1515         default:
1516                 dev_dbg(fe->dvb->device,
1517                         "%s: FE property %d doesn't exist\n",
1518                         __func__, tvp->cmd);
1519                 return -EINVAL;
1520         }
1521
1522         /* Allow the frontend to override outgoing properties */
1523         if (fe->ops.get_property) {
1524                 r = fe->ops.get_property(fe, tvp);
1525                 if (r < 0)
1526                         return r;
1527         }
1528
1529         dtv_property_dump(fe, false, tvp);
1530
1531         return 0;
1532 }
1533
1534 static int dtv_set_frontend(struct dvb_frontend *fe);
1535
1536 static bool is_dvbv3_delsys(u32 delsys)
1537 {
1538         return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1539                (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1540 }
1541
1542 /**
1543  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1544  * @fe:                 struct frontend;
1545  * @delsys:                     DVBv5 type that will be used for emulation
1546  *
1547  * Provides emulation for delivery systems that are compatible with the old
1548  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1549  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1550  * parameters are compatible with DVB-S spec.
1551  */
1552 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1553 {
1554         int i;
1555         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1556
1557         c->delivery_system = delsys;
1558
1559         /*
1560          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1561          */
1562         if (c->delivery_system == SYS_ISDBT) {
1563                 dev_dbg(fe->dvb->device,
1564                         "%s: Using defaults for SYS_ISDBT\n",
1565                         __func__);
1566
1567                 if (!c->bandwidth_hz)
1568                         c->bandwidth_hz = 6000000;
1569
1570                 c->isdbt_partial_reception = 0;
1571                 c->isdbt_sb_mode = 0;
1572                 c->isdbt_sb_subchannel = 0;
1573                 c->isdbt_sb_segment_idx = 0;
1574                 c->isdbt_sb_segment_count = 0;
1575                 c->isdbt_layer_enabled = 7;
1576                 for (i = 0; i < 3; i++) {
1577                         c->layer[i].fec = FEC_AUTO;
1578                         c->layer[i].modulation = QAM_AUTO;
1579                         c->layer[i].interleaving = 0;
1580                         c->layer[i].segment_count = 0;
1581                 }
1582         }
1583         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1584                 __func__, c->delivery_system);
1585
1586         return 0;
1587 }
1588
1589 /**
1590  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1591  * @fe:                 frontend struct
1592  * @desired_system:     delivery system requested by the user
1593  *
1594  * A DVBv5 call know what's the desired system it wants. So, set it.
1595  *
1596  * There are, however, a few known issues with early DVBv5 applications that
1597  * are also handled by this logic:
1598  *
1599  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1600  *    This is an API violation, but, as we don't want to break userspace,
1601  *    convert it to the first supported delivery system.
1602  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1603  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1604  *    ISDB-T provided backward compat with DVB-T.
1605  */
1606 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1607                                      u32 desired_system)
1608 {
1609         int ncaps;
1610         u32 delsys = SYS_UNDEFINED;
1611         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1612         enum dvbv3_emulation_type type;
1613
1614         /*
1615          * It was reported that some old DVBv5 applications were
1616          * filling delivery_system with SYS_UNDEFINED. If this happens,
1617          * assume that the application wants to use the first supported
1618          * delivery system.
1619          */
1620         if (desired_system == SYS_UNDEFINED)
1621                 desired_system = fe->ops.delsys[0];
1622
1623         /*
1624          * This is a DVBv5 call. So, it likely knows the supported
1625          * delivery systems. So, check if the desired delivery system is
1626          * supported
1627          */
1628         ncaps = 0;
1629         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1630                 if (fe->ops.delsys[ncaps] == desired_system) {
1631                         c->delivery_system = desired_system;
1632                         dev_dbg(fe->dvb->device,
1633                                         "%s: Changing delivery system to %d\n",
1634                                         __func__, desired_system);
1635                         return 0;
1636                 }
1637                 ncaps++;
1638         }
1639
1640         /*
1641          * The requested delivery system isn't supported. Maybe userspace
1642          * is requesting a DVBv3 compatible delivery system.
1643          *
1644          * The emulation only works if the desired system is one of the
1645          * delivery systems supported by DVBv3 API
1646          */
1647         if (!is_dvbv3_delsys(desired_system)) {
1648                 dev_dbg(fe->dvb->device,
1649                         "%s: Delivery system %d not supported.\n",
1650                         __func__, desired_system);
1651                 return -EINVAL;
1652         }
1653
1654         type = dvbv3_type(desired_system);
1655
1656         /*
1657         * Get the last non-DVBv3 delivery system that has the same type
1658         * of the desired system
1659         */
1660         ncaps = 0;
1661         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1662                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1663                         delsys = fe->ops.delsys[ncaps];
1664                 ncaps++;
1665         }
1666
1667         /* There's nothing compatible with the desired delivery system */
1668         if (delsys == SYS_UNDEFINED) {
1669                 dev_dbg(fe->dvb->device,
1670                         "%s: Delivery system %d not supported on emulation mode.\n",
1671                         __func__, desired_system);
1672                 return -EINVAL;
1673         }
1674
1675         dev_dbg(fe->dvb->device,
1676                 "%s: Using delivery system %d emulated as if it were %d\n",
1677                 __func__, delsys, desired_system);
1678
1679         return emulate_delivery_system(fe, desired_system);
1680 }
1681
1682 /**
1683  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1684  * @fe: frontend struct
1685  *
1686  * A DVBv3 call doesn't know what's the desired system it wants. It also
1687  * doesn't allow to switch between different types. Due to that, userspace
1688  * should use DVBv5 instead.
1689  * However, in order to avoid breaking userspace API, limited backward
1690  * compatibility support is provided.
1691  *
1692  * There are some delivery systems that are incompatible with DVBv3 calls.
1693  *
1694  * This routine should work fine for frontends that support just one delivery
1695  * system.
1696  *
1697  * For frontends that support multiple frontends:
1698  * 1) It defaults to use the first supported delivery system. There's an
1699  *    userspace application that allows changing it at runtime;
1700  *
1701  * 2) If the current delivery system is not compatible with DVBv3, it gets
1702  *    the first one that it is compatible.
1703  *
1704  * NOTE: in order for this to work with applications like Kaffeine that
1705  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1706  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1707  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1708  *      to DVB-S.
1709  */
1710 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1711 {
1712         int ncaps;
1713         u32 delsys = SYS_UNDEFINED;
1714         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1715
1716         /* If not set yet, defaults to the first supported delivery system */
1717         if (c->delivery_system == SYS_UNDEFINED)
1718                 c->delivery_system = fe->ops.delsys[0];
1719
1720         /*
1721          * Trivial case: just use the current one, if it already a DVBv3
1722          * delivery system
1723          */
1724         if (is_dvbv3_delsys(c->delivery_system)) {
1725                 dev_dbg(fe->dvb->device,
1726                                 "%s: Using delivery system to %d\n",
1727                                 __func__, c->delivery_system);
1728                 return 0;
1729         }
1730
1731         /*
1732          * Seek for the first delivery system that it is compatible with a
1733          * DVBv3 standard
1734          */
1735         ncaps = 0;
1736         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1737                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1738                         delsys = fe->ops.delsys[ncaps];
1739                         break;
1740                 }
1741                 ncaps++;
1742         }
1743         if (delsys == SYS_UNDEFINED) {
1744                 dev_dbg(fe->dvb->device,
1745                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1746                         __func__);
1747                 return -EINVAL;
1748         }
1749         return emulate_delivery_system(fe, delsys);
1750 }
1751
1752 static int dtv_property_process_set(struct dvb_frontend *fe,
1753                                     struct dtv_property *tvp,
1754                                     struct file *file)
1755 {
1756         int r = 0;
1757         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1758
1759         /* Allow the frontend to validate incoming properties */
1760         if (fe->ops.set_property) {
1761                 r = fe->ops.set_property(fe, tvp);
1762                 if (r < 0)
1763                         return r;
1764         }
1765
1766         dtv_property_dump(fe, true, tvp);
1767
1768         switch(tvp->cmd) {
1769         case DTV_CLEAR:
1770                 /*
1771                  * Reset a cache of data specific to the frontend here. This does
1772                  * not effect hardware.
1773                  */
1774                 dvb_frontend_clear_cache(fe);
1775                 break;
1776         case DTV_TUNE:
1777                 /* interpret the cache of data, build either a traditional frontend
1778                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1779                  * ioctl.
1780                  */
1781                 c->state = tvp->cmd;
1782                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1783                                 __func__);
1784
1785                 r = dtv_set_frontend(fe);
1786                 break;
1787         case DTV_FREQUENCY:
1788                 c->frequency = tvp->u.data;
1789                 break;
1790         case DTV_MODULATION:
1791                 c->modulation = tvp->u.data;
1792                 break;
1793         case DTV_BANDWIDTH_HZ:
1794                 c->bandwidth_hz = tvp->u.data;
1795                 break;
1796         case DTV_INVERSION:
1797                 c->inversion = tvp->u.data;
1798                 break;
1799         case DTV_SYMBOL_RATE:
1800                 c->symbol_rate = tvp->u.data;
1801                 break;
1802         case DTV_INNER_FEC:
1803                 c->fec_inner = tvp->u.data;
1804                 break;
1805         case DTV_PILOT:
1806                 c->pilot = tvp->u.data;
1807                 break;
1808         case DTV_ROLLOFF:
1809                 c->rolloff = tvp->u.data;
1810                 break;
1811         case DTV_DELIVERY_SYSTEM:
1812                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1813                 break;
1814         case DTV_VOLTAGE:
1815                 c->voltage = tvp->u.data;
1816                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1817                         (void *)c->voltage);
1818                 break;
1819         case DTV_TONE:
1820                 c->sectone = tvp->u.data;
1821                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1822                         (void *)c->sectone);
1823                 break;
1824         case DTV_CODE_RATE_HP:
1825                 c->code_rate_HP = tvp->u.data;
1826                 break;
1827         case DTV_CODE_RATE_LP:
1828                 c->code_rate_LP = tvp->u.data;
1829                 break;
1830         case DTV_GUARD_INTERVAL:
1831                 c->guard_interval = tvp->u.data;
1832                 break;
1833         case DTV_TRANSMISSION_MODE:
1834                 c->transmission_mode = tvp->u.data;
1835                 break;
1836         case DTV_HIERARCHY:
1837                 c->hierarchy = tvp->u.data;
1838                 break;
1839         case DTV_INTERLEAVING:
1840                 c->interleaving = tvp->u.data;
1841                 break;
1842
1843         /* ISDB-T Support here */
1844         case DTV_ISDBT_PARTIAL_RECEPTION:
1845                 c->isdbt_partial_reception = tvp->u.data;
1846                 break;
1847         case DTV_ISDBT_SOUND_BROADCASTING:
1848                 c->isdbt_sb_mode = tvp->u.data;
1849                 break;
1850         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1851                 c->isdbt_sb_subchannel = tvp->u.data;
1852                 break;
1853         case DTV_ISDBT_SB_SEGMENT_IDX:
1854                 c->isdbt_sb_segment_idx = tvp->u.data;
1855                 break;
1856         case DTV_ISDBT_SB_SEGMENT_COUNT:
1857                 c->isdbt_sb_segment_count = tvp->u.data;
1858                 break;
1859         case DTV_ISDBT_LAYER_ENABLED:
1860                 c->isdbt_layer_enabled = tvp->u.data;
1861                 break;
1862         case DTV_ISDBT_LAYERA_FEC:
1863                 c->layer[0].fec = tvp->u.data;
1864                 break;
1865         case DTV_ISDBT_LAYERA_MODULATION:
1866                 c->layer[0].modulation = tvp->u.data;
1867                 break;
1868         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1869                 c->layer[0].segment_count = tvp->u.data;
1870                 break;
1871         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1872                 c->layer[0].interleaving = tvp->u.data;
1873                 break;
1874         case DTV_ISDBT_LAYERB_FEC:
1875                 c->layer[1].fec = tvp->u.data;
1876                 break;
1877         case DTV_ISDBT_LAYERB_MODULATION:
1878                 c->layer[1].modulation = tvp->u.data;
1879                 break;
1880         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1881                 c->layer[1].segment_count = tvp->u.data;
1882                 break;
1883         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1884                 c->layer[1].interleaving = tvp->u.data;
1885                 break;
1886         case DTV_ISDBT_LAYERC_FEC:
1887                 c->layer[2].fec = tvp->u.data;
1888                 break;
1889         case DTV_ISDBT_LAYERC_MODULATION:
1890                 c->layer[2].modulation = tvp->u.data;
1891                 break;
1892         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1893                 c->layer[2].segment_count = tvp->u.data;
1894                 break;
1895         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1896                 c->layer[2].interleaving = tvp->u.data;
1897                 break;
1898
1899         /* Multistream support */
1900         case DTV_STREAM_ID:
1901         case DTV_DVBT2_PLP_ID_LEGACY:
1902                 c->stream_id = tvp->u.data;
1903                 break;
1904
1905         /* ATSC-MH */
1906         case DTV_ATSCMH_PARADE_ID:
1907                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1908                 break;
1909         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1910                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1911                 break;
1912
1913         case DTV_LNA:
1914                 c->lna = tvp->u.data;
1915                 if (fe->ops.set_lna)
1916                         r = fe->ops.set_lna(fe);
1917                 if (r < 0)
1918                         c->lna = LNA_AUTO;
1919                 break;
1920
1921         default:
1922                 return -EINVAL;
1923         }
1924
1925         return r;
1926 }
1927
1928 static int dvb_frontend_ioctl(struct file *file,
1929                         unsigned int cmd, void *parg)
1930 {
1931         struct dvb_device *dvbdev = file->private_data;
1932         struct dvb_frontend *fe = dvbdev->priv;
1933         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1934         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1935         int err = -EOPNOTSUPP;
1936
1937         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1938         if (down_interruptible(&fepriv->sem))
1939                 return -ERESTARTSYS;
1940
1941         if (fe->exit != DVB_FE_NO_EXIT) {
1942                 up(&fepriv->sem);
1943                 return -ENODEV;
1944         }
1945
1946         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1947             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1948              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1949                 up(&fepriv->sem);
1950                 return -EPERM;
1951         }
1952
1953         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1954                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1955         else {
1956                 c->state = DTV_UNDEFINED;
1957                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1958         }
1959
1960         up(&fepriv->sem);
1961         return err;
1962 }
1963
1964 static int dvb_frontend_ioctl_properties(struct file *file,
1965                         unsigned int cmd, void *parg)
1966 {
1967         struct dvb_device *dvbdev = file->private_data;
1968         struct dvb_frontend *fe = dvbdev->priv;
1969         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1970         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1971         int err = 0;
1972
1973         struct dtv_properties *tvps = parg;
1974         struct dtv_property *tvp = NULL;
1975         int i;
1976
1977         dev_dbg(fe->dvb->device, "%s:\n", __func__);
1978
1979         if (cmd == FE_SET_PROPERTY) {
1980                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1981                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1982
1983                 /* Put an arbitrary limit on the number of messages that can
1984                  * be sent at once */
1985                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1986                         return -EINVAL;
1987
1988                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
1989                 if (IS_ERR(tvp))
1990                         return PTR_ERR(tvp);
1991
1992                 for (i = 0; i < tvps->num; i++) {
1993                         err = dtv_property_process_set(fe, tvp + i, file);
1994                         if (err < 0)
1995                                 goto out;
1996                         (tvp + i)->result = err;
1997                 }
1998
1999                 if (c->state == DTV_TUNE)
2000                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
2001
2002         } else if (cmd == FE_GET_PROPERTY) {
2003                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2004
2005                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2006                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2007
2008                 /* Put an arbitrary limit on the number of messages that can
2009                  * be sent at once */
2010                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2011                         return -EINVAL;
2012
2013                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2014                 if (IS_ERR(tvp))
2015                         return PTR_ERR(tvp);
2016
2017                 /*
2018                  * Let's use our own copy of property cache, in order to
2019                  * avoid mangling with DTV zigzag logic, as drivers might
2020                  * return crap, if they don't check if the data is available
2021                  * before updating the properties cache.
2022                  */
2023                 if (fepriv->state != FESTATE_IDLE) {
2024                         err = dtv_get_frontend(fe, &getp, NULL);
2025                         if (err < 0)
2026                                 goto out;
2027                 }
2028                 for (i = 0; i < tvps->num; i++) {
2029                         err = dtv_property_process_get(fe, &getp, tvp + i, file);
2030                         if (err < 0)
2031                                 goto out;
2032                         (tvp + i)->result = err;
2033                 }
2034
2035                 if (copy_to_user((void __user *)tvps->props, tvp,
2036                                  tvps->num * sizeof(struct dtv_property))) {
2037                         err = -EFAULT;
2038                         goto out;
2039                 }
2040
2041         } else
2042                 err = -EOPNOTSUPP;
2043
2044 out:
2045         kfree(tvp);
2046         return err;
2047 }
2048
2049 static int dtv_set_frontend(struct dvb_frontend *fe)
2050 {
2051         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2052         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2053         struct dvb_frontend_tune_settings fetunesettings;
2054         u32 rolloff = 0;
2055
2056         if (dvb_frontend_check_parameters(fe) < 0)
2057                 return -EINVAL;
2058
2059         /*
2060          * Initialize output parameters to match the values given by
2061          * the user. FE_SET_FRONTEND triggers an initial frontend event
2062          * with status = 0, which copies output parameters to userspace.
2063          */
2064         dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2065
2066         /*
2067          * Be sure that the bandwidth will be filled for all
2068          * non-satellite systems, as tuners need to know what
2069          * low pass/Nyquist half filter should be applied, in
2070          * order to avoid inter-channel noise.
2071          *
2072          * ISDB-T and DVB-T/T2 already sets bandwidth.
2073          * ATSC and DVB-C don't set, so, the core should fill it.
2074          *
2075          * On DVB-C Annex A and C, the bandwidth is a function of
2076          * the roll-off and symbol rate. Annex B defines different
2077          * roll-off factors depending on the modulation. Fortunately,
2078          * Annex B is only used with 6MHz, so there's no need to
2079          * calculate it.
2080          *
2081          * While not officially supported, a side effect of handling it at
2082          * the cache level is that a program could retrieve the bandwidth
2083          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2084          */
2085         switch (c->delivery_system) {
2086         case SYS_ATSC:
2087         case SYS_DVBC_ANNEX_B:
2088                 c->bandwidth_hz = 6000000;
2089                 break;
2090         case SYS_DVBC_ANNEX_A:
2091                 rolloff = 115;
2092                 break;
2093         case SYS_DVBC_ANNEX_C:
2094                 rolloff = 113;
2095                 break;
2096         case SYS_DVBS:
2097         case SYS_TURBO:
2098         case SYS_ISDBS:
2099                 rolloff = 135;
2100                 break;
2101         case SYS_DVBS2:
2102                 switch (c->rolloff) {
2103                 case ROLLOFF_20:
2104                         rolloff = 120;
2105                         break;
2106                 case ROLLOFF_25:
2107                         rolloff = 125;
2108                         break;
2109                 default:
2110                 case ROLLOFF_35:
2111                         rolloff = 135;
2112                 }
2113                 break;
2114         default:
2115                 break;
2116         }
2117         if (rolloff)
2118                 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2119
2120         /* force auto frequency inversion if requested */
2121         if (dvb_force_auto_inversion)
2122                 c->inversion = INVERSION_AUTO;
2123
2124         /*
2125          * without hierarchical coding code_rate_LP is irrelevant,
2126          * so we tolerate the otherwise invalid FEC_NONE setting
2127          */
2128         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2129                 c->code_rate_LP = FEC_AUTO;
2130
2131         /* get frontend-specific tuning settings */
2132         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2133         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2134                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2135                 fepriv->max_drift = fetunesettings.max_drift;
2136                 fepriv->step_size = fetunesettings.step_size;
2137         } else {
2138                 /* default values */
2139                 switch (c->delivery_system) {
2140                 case SYS_DVBS:
2141                 case SYS_DVBS2:
2142                 case SYS_ISDBS:
2143                 case SYS_TURBO:
2144                 case SYS_DVBC_ANNEX_A:
2145                 case SYS_DVBC_ANNEX_C:
2146                         fepriv->min_delay = HZ / 20;
2147                         fepriv->step_size = c->symbol_rate / 16000;
2148                         fepriv->max_drift = c->symbol_rate / 2000;
2149                         break;
2150                 case SYS_DVBT:
2151                 case SYS_DVBT2:
2152                 case SYS_ISDBT:
2153                 case SYS_DTMB:
2154                         fepriv->min_delay = HZ / 20;
2155                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2156                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2157                         break;
2158                 default:
2159                         /*
2160                          * FIXME: This sounds wrong! if freqency_stepsize is
2161                          * defined by the frontend, why not use it???
2162                          */
2163                         fepriv->min_delay = HZ / 20;
2164                         fepriv->step_size = 0; /* no zigzag */
2165                         fepriv->max_drift = 0;
2166                         break;
2167                 }
2168         }
2169         if (dvb_override_tune_delay > 0)
2170                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2171
2172         fepriv->state = FESTATE_RETUNE;
2173
2174         /* Request the search algorithm to search */
2175         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2176
2177         dvb_frontend_clear_events(fe);
2178         dvb_frontend_add_event(fe, 0);
2179         dvb_frontend_wakeup(fe);
2180         fepriv->status = 0;
2181
2182         return 0;
2183 }
2184
2185
2186 static int dvb_frontend_ioctl_legacy(struct file *file,
2187                         unsigned int cmd, void *parg)
2188 {
2189         struct dvb_device *dvbdev = file->private_data;
2190         struct dvb_frontend *fe = dvbdev->priv;
2191         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2192         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2193         int err = -EOPNOTSUPP;
2194
2195         switch (cmd) {
2196         case FE_GET_INFO: {
2197                 struct dvb_frontend_info* info = parg;
2198
2199                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2200                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2201
2202                 /*
2203                  * Associate the 4 delivery systems supported by DVBv3
2204                  * API with their DVBv5 counterpart. For the other standards,
2205                  * use the closest type, assuming that it would hopefully
2206                  * work with a DVBv3 application.
2207                  * It should be noticed that, on multi-frontend devices with
2208                  * different types (terrestrial and cable, for example),
2209                  * a pure DVBv3 application won't be able to use all delivery
2210                  * systems. Yet, changing the DVBv5 cache to the other delivery
2211                  * system should be enough for making it work.
2212                  */
2213                 switch (dvbv3_type(c->delivery_system)) {
2214                 case DVBV3_QPSK:
2215                         info->type = FE_QPSK;
2216                         break;
2217                 case DVBV3_ATSC:
2218                         info->type = FE_ATSC;
2219                         break;
2220                 case DVBV3_QAM:
2221                         info->type = FE_QAM;
2222                         break;
2223                 case DVBV3_OFDM:
2224                         info->type = FE_OFDM;
2225                         break;
2226                 default:
2227                         dev_err(fe->dvb->device,
2228                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2229                                         __func__, c->delivery_system);
2230                         fe->ops.info.type = FE_OFDM;
2231                 }
2232                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2233                                  __func__, c->delivery_system, fe->ops.info.type);
2234
2235                 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2236                 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2237                         info->caps |= FE_CAN_INVERSION_AUTO;
2238                 err = 0;
2239                 break;
2240         }
2241
2242         case FE_READ_STATUS: {
2243                 enum fe_status *status = parg;
2244
2245                 /* if retune was requested but hasn't occurred yet, prevent
2246                  * that user get signal state from previous tuning */
2247                 if (fepriv->state == FESTATE_RETUNE ||
2248                     fepriv->state == FESTATE_ERROR) {
2249                         err=0;
2250                         *status = 0;
2251                         break;
2252                 }
2253
2254                 if (fe->ops.read_status)
2255                         err = fe->ops.read_status(fe, status);
2256                 break;
2257         }
2258
2259         case FE_READ_BER:
2260                 if (fe->ops.read_ber) {
2261                         if (fepriv->thread)
2262                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2263                         else
2264                                 err = -EAGAIN;
2265                 }
2266                 break;
2267
2268         case FE_READ_SIGNAL_STRENGTH:
2269                 if (fe->ops.read_signal_strength) {
2270                         if (fepriv->thread)
2271                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2272                         else
2273                                 err = -EAGAIN;
2274                 }
2275                 break;
2276
2277         case FE_READ_SNR:
2278                 if (fe->ops.read_snr) {
2279                         if (fepriv->thread)
2280                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2281                         else
2282                                 err = -EAGAIN;
2283                 }
2284                 break;
2285
2286         case FE_READ_UNCORRECTED_BLOCKS:
2287                 if (fe->ops.read_ucblocks) {
2288                         if (fepriv->thread)
2289                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2290                         else
2291                                 err = -EAGAIN;
2292                 }
2293                 break;
2294
2295         case FE_DISEQC_RESET_OVERLOAD:
2296                 if (fe->ops.diseqc_reset_overload) {
2297                         err = fe->ops.diseqc_reset_overload(fe);
2298                         fepriv->state = FESTATE_DISEQC;
2299                         fepriv->status = 0;
2300                 }
2301                 break;
2302
2303         case FE_DISEQC_SEND_MASTER_CMD:
2304                 if (fe->ops.diseqc_send_master_cmd) {
2305                         struct dvb_diseqc_master_cmd *cmd = parg;
2306
2307                         if (cmd->msg_len > sizeof(cmd->msg)) {
2308                                 err = -EINVAL;
2309                                 break;
2310                         }
2311                         err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2312                         fepriv->state = FESTATE_DISEQC;
2313                         fepriv->status = 0;
2314                 }
2315                 break;
2316
2317         case FE_DISEQC_SEND_BURST:
2318                 if (fe->ops.diseqc_send_burst) {
2319                         err = fe->ops.diseqc_send_burst(fe,
2320                                                 (enum fe_sec_mini_cmd)parg);
2321                         fepriv->state = FESTATE_DISEQC;
2322                         fepriv->status = 0;
2323                 }
2324                 break;
2325
2326         case FE_SET_TONE:
2327                 if (fe->ops.set_tone) {
2328                         err = fe->ops.set_tone(fe,
2329                                                (enum fe_sec_tone_mode)parg);
2330                         fepriv->tone = (enum fe_sec_tone_mode)parg;
2331                         fepriv->state = FESTATE_DISEQC;
2332                         fepriv->status = 0;
2333                 }
2334                 break;
2335
2336         case FE_SET_VOLTAGE:
2337                 if (fe->ops.set_voltage) {
2338                         err = fe->ops.set_voltage(fe,
2339                                                   (enum fe_sec_voltage)parg);
2340                         fepriv->voltage = (enum fe_sec_voltage)parg;
2341                         fepriv->state = FESTATE_DISEQC;
2342                         fepriv->status = 0;
2343                 }
2344                 break;
2345
2346         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2347                 if (fe->ops.dishnetwork_send_legacy_command) {
2348                         err = fe->ops.dishnetwork_send_legacy_command(fe,
2349                                                          (unsigned long)parg);
2350                         fepriv->state = FESTATE_DISEQC;
2351                         fepriv->status = 0;
2352                 } else if (fe->ops.set_voltage) {
2353                         /*
2354                          * NOTE: This is a fallback condition.  Some frontends
2355                          * (stv0299 for instance) take longer than 8msec to
2356                          * respond to a set_voltage command.  Those switches
2357                          * need custom routines to switch properly.  For all
2358                          * other frontends, the following should work ok.
2359                          * Dish network legacy switches (as used by Dish500)
2360                          * are controlled by sending 9-bit command words
2361                          * spaced 8msec apart.
2362                          * the actual command word is switch/port dependent
2363                          * so it is up to the userspace application to send
2364                          * the right command.
2365                          * The command must always start with a '0' after
2366                          * initialization, so parg is 8 bits and does not
2367                          * include the initialization or start bit
2368                          */
2369                         unsigned long swcmd = ((unsigned long) parg) << 1;
2370                         ktime_t nexttime;
2371                         ktime_t tv[10];
2372                         int i;
2373                         u8 last = 1;
2374                         if (dvb_frontend_debug)
2375                                 dprintk("%s switch command: 0x%04lx\n",
2376                                         __func__, swcmd);
2377                         nexttime = ktime_get_boottime();
2378                         if (dvb_frontend_debug)
2379                                 tv[0] = nexttime;
2380                         /* before sending a command, initialize by sending
2381                          * a 32ms 18V to the switch
2382                          */
2383                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2384                         dvb_frontend_sleep_until(&nexttime, 32000);
2385
2386                         for (i = 0; i < 9; i++) {
2387                                 if (dvb_frontend_debug)
2388                                         tv[i+1] = ktime_get_boottime();
2389                                 if ((swcmd & 0x01) != last) {
2390                                         /* set voltage to (last ? 13V : 18V) */
2391                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2392                                         last = (last) ? 0 : 1;
2393                                 }
2394                                 swcmd = swcmd >> 1;
2395                                 if (i != 8)
2396                                         dvb_frontend_sleep_until(&nexttime, 8000);
2397                         }
2398                         if (dvb_frontend_debug) {
2399                                 dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n",
2400                                         __func__, fe->dvb->num);
2401                                 for (i = 1; i < 10; i++)
2402                                         pr_info("%d: %d\n", i,
2403                                         (int) ktime_us_delta(tv[i], tv[i-1]));
2404                         }
2405                         err = 0;
2406                         fepriv->state = FESTATE_DISEQC;
2407                         fepriv->status = 0;
2408                 }
2409                 break;
2410
2411         case FE_DISEQC_RECV_SLAVE_REPLY:
2412                 if (fe->ops.diseqc_recv_slave_reply)
2413                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2414                 break;
2415
2416         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2417                 if (fe->ops.enable_high_lnb_voltage)
2418                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2419                 break;
2420
2421         case FE_SET_FRONTEND:
2422                 err = dvbv3_set_delivery_system(fe);
2423                 if (err)
2424                         break;
2425
2426                 err = dtv_property_cache_sync(fe, c, parg);
2427                 if (err)
2428                         break;
2429                 err = dtv_set_frontend(fe);
2430                 break;
2431         case FE_GET_EVENT:
2432                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2433                 break;
2434
2435         case FE_GET_FRONTEND: {
2436                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2437
2438                 /*
2439                  * Let's use our own copy of property cache, in order to
2440                  * avoid mangling with DTV zigzag logic, as drivers might
2441                  * return crap, if they don't check if the data is available
2442                  * before updating the properties cache.
2443                  */
2444                 err = dtv_get_frontend(fe, &getp, parg);
2445                 break;
2446         }
2447         case FE_SET_FRONTEND_TUNE_MODE:
2448                 fepriv->tune_mode_flags = (unsigned long) parg;
2449                 err = 0;
2450                 break;
2451         }
2452
2453         return err;
2454 }
2455
2456
2457 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2458 {
2459         struct dvb_device *dvbdev = file->private_data;
2460         struct dvb_frontend *fe = dvbdev->priv;
2461         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2462
2463         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2464
2465         poll_wait (file, &fepriv->events.wait_queue, wait);
2466
2467         if (fepriv->events.eventw != fepriv->events.eventr)
2468                 return (POLLIN | POLLRDNORM | POLLPRI);
2469
2470         return 0;
2471 }
2472
2473 static int dvb_frontend_open(struct inode *inode, struct file *file)
2474 {
2475         struct dvb_device *dvbdev = file->private_data;
2476         struct dvb_frontend *fe = dvbdev->priv;
2477         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2478         struct dvb_adapter *adapter = fe->dvb;
2479         int ret;
2480
2481         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2482         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2483                 return -ENODEV;
2484
2485         if (adapter->mfe_shared) {
2486                 mutex_lock (&adapter->mfe_lock);
2487
2488                 if (adapter->mfe_dvbdev == NULL)
2489                         adapter->mfe_dvbdev = dvbdev;
2490
2491                 else if (adapter->mfe_dvbdev != dvbdev) {
2492                         struct dvb_device
2493                                 *mfedev = adapter->mfe_dvbdev;
2494                         struct dvb_frontend
2495                                 *mfe = mfedev->priv;
2496                         struct dvb_frontend_private
2497                                 *mfepriv = mfe->frontend_priv;
2498                         int mferetry = (dvb_mfe_wait_time << 1);
2499
2500                         mutex_unlock (&adapter->mfe_lock);
2501                         while (mferetry-- && (mfedev->users != -1 ||
2502                                         mfepriv->thread != NULL)) {
2503                                 if(msleep_interruptible(500)) {
2504                                         if(signal_pending(current))
2505                                                 return -EINTR;
2506                                 }
2507                         }
2508
2509                         mutex_lock (&adapter->mfe_lock);
2510                         if(adapter->mfe_dvbdev != dvbdev) {
2511                                 mfedev = adapter->mfe_dvbdev;
2512                                 mfe = mfedev->priv;
2513                                 mfepriv = mfe->frontend_priv;
2514                                 if (mfedev->users != -1 ||
2515                                                 mfepriv->thread != NULL) {
2516                                         mutex_unlock (&adapter->mfe_lock);
2517                                         return -EBUSY;
2518                                 }
2519                                 adapter->mfe_dvbdev = dvbdev;
2520                         }
2521                 }
2522         }
2523
2524         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2525                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2526                         goto err0;
2527
2528                 /* If we took control of the bus, we need to force
2529                    reinitialization.  This is because many ts_bus_ctrl()
2530                    functions strobe the RESET pin on the demod, and if the
2531                    frontend thread already exists then the dvb_init() routine
2532                    won't get called (which is what usually does initial
2533                    register configuration). */
2534                 fepriv->reinitialise = 1;
2535         }
2536
2537         if ((ret = dvb_generic_open (inode, file)) < 0)
2538                 goto err1;
2539
2540         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2541                 /* normal tune mode when opened R/W */
2542                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2543                 fepriv->tone = -1;
2544                 fepriv->voltage = -1;
2545
2546 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2547                 if (fe->dvb->mdev) {
2548                         mutex_lock(&fe->dvb->mdev->graph_mutex);
2549                         if (fe->dvb->mdev->enable_source)
2550                                 ret = fe->dvb->mdev->enable_source(
2551                                                            dvbdev->entity,
2552                                                            &fepriv->pipe);
2553                         mutex_unlock(&fe->dvb->mdev->graph_mutex);
2554                         if (ret) {
2555                                 dev_err(fe->dvb->device,
2556                                         "Tuner is busy. Error %d\n", ret);
2557                                 goto err2;
2558                         }
2559                 }
2560 #endif
2561                 ret = dvb_frontend_start (fe);
2562                 if (ret)
2563                         goto err3;
2564
2565                 /*  empty event queue */
2566                 fepriv->events.eventr = fepriv->events.eventw = 0;
2567         }
2568
2569         dvb_frontend_get(fe);
2570
2571         if (adapter->mfe_shared)
2572                 mutex_unlock (&adapter->mfe_lock);
2573         return ret;
2574
2575 err3:
2576 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2577         if (fe->dvb->mdev) {
2578                 mutex_lock(&fe->dvb->mdev->graph_mutex);
2579                 if (fe->dvb->mdev->disable_source)
2580                         fe->dvb->mdev->disable_source(dvbdev->entity);
2581                 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2582         }
2583 err2:
2584 #endif
2585         dvb_generic_release(inode, file);
2586 err1:
2587         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2588                 fe->ops.ts_bus_ctrl(fe, 0);
2589 err0:
2590         if (adapter->mfe_shared)
2591                 mutex_unlock (&adapter->mfe_lock);
2592         return ret;
2593 }
2594
2595 static int dvb_frontend_release(struct inode *inode, struct file *file)
2596 {
2597         struct dvb_device *dvbdev = file->private_data;
2598         struct dvb_frontend *fe = dvbdev->priv;
2599         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2600         int ret;
2601
2602         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2603
2604         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2605                 fepriv->release_jiffies = jiffies;
2606                 mb();
2607         }
2608
2609         ret = dvb_generic_release (inode, file);
2610
2611         if (dvbdev->users == -1) {
2612                 wake_up(&fepriv->wait_queue);
2613 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2614                 if (fe->dvb->mdev) {
2615                         mutex_lock(&fe->dvb->mdev->graph_mutex);
2616                         if (fe->dvb->mdev->disable_source)
2617                                 fe->dvb->mdev->disable_source(dvbdev->entity);
2618                         mutex_unlock(&fe->dvb->mdev->graph_mutex);
2619                 }
2620 #endif
2621                 if (fe->exit != DVB_FE_NO_EXIT)
2622                         wake_up(&dvbdev->wait_queue);
2623                 if (fe->ops.ts_bus_ctrl)
2624                         fe->ops.ts_bus_ctrl(fe, 0);
2625         }
2626
2627         dvb_frontend_put(fe);
2628
2629         return ret;
2630 }
2631
2632 static const struct file_operations dvb_frontend_fops = {
2633         .owner          = THIS_MODULE,
2634         .unlocked_ioctl = dvb_generic_ioctl,
2635         .poll           = dvb_frontend_poll,
2636         .open           = dvb_frontend_open,
2637         .release        = dvb_frontend_release,
2638         .llseek         = noop_llseek,
2639 };
2640
2641 int dvb_frontend_suspend(struct dvb_frontend *fe)
2642 {
2643         int ret = 0;
2644
2645         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2646                         fe->id);
2647
2648         if (fe->ops.tuner_ops.suspend)
2649                 ret = fe->ops.tuner_ops.suspend(fe);
2650         else if (fe->ops.tuner_ops.sleep)
2651                 ret = fe->ops.tuner_ops.sleep(fe);
2652
2653         if (fe->ops.sleep)
2654                 ret = fe->ops.sleep(fe);
2655
2656         return ret;
2657 }
2658 EXPORT_SYMBOL(dvb_frontend_suspend);
2659
2660 int dvb_frontend_resume(struct dvb_frontend *fe)
2661 {
2662         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2663         int ret = 0;
2664
2665         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2666                         fe->id);
2667
2668         fe->exit = DVB_FE_DEVICE_RESUME;
2669         if (fe->ops.init)
2670                 ret = fe->ops.init(fe);
2671
2672         if (fe->ops.tuner_ops.resume)
2673                 ret = fe->ops.tuner_ops.resume(fe);
2674         else if (fe->ops.tuner_ops.init)
2675                 ret = fe->ops.tuner_ops.init(fe);
2676
2677         if (fe->ops.set_tone && fepriv->tone != -1)
2678                 fe->ops.set_tone(fe, fepriv->tone);
2679         if (fe->ops.set_voltage && fepriv->voltage != -1)
2680                 fe->ops.set_voltage(fe, fepriv->voltage);
2681
2682         fe->exit = DVB_FE_NO_EXIT;
2683         fepriv->state = FESTATE_RETUNE;
2684         dvb_frontend_wakeup(fe);
2685
2686         return ret;
2687 }
2688 EXPORT_SYMBOL(dvb_frontend_resume);
2689
2690 int dvb_register_frontend(struct dvb_adapter* dvb,
2691                           struct dvb_frontend* fe)
2692 {
2693         struct dvb_frontend_private *fepriv;
2694         const struct dvb_device dvbdev_template = {
2695                 .users = ~0,
2696                 .writers = 1,
2697                 .readers = (~0)-1,
2698                 .fops = &dvb_frontend_fops,
2699 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2700                 .name = fe->ops.info.name,
2701 #endif
2702                 .kernel_ioctl = dvb_frontend_ioctl
2703         };
2704
2705         dev_dbg(dvb->device, "%s:\n", __func__);
2706
2707         if (mutex_lock_interruptible(&frontend_mutex))
2708                 return -ERESTARTSYS;
2709
2710         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2711         if (fe->frontend_priv == NULL) {
2712                 mutex_unlock(&frontend_mutex);
2713                 return -ENOMEM;
2714         }
2715         fepriv = fe->frontend_priv;
2716
2717         kref_init(&fe->refcount);
2718
2719         /*
2720          * After initialization, there need to be two references: one
2721          * for dvb_unregister_frontend(), and another one for
2722          * dvb_frontend_detach().
2723          */
2724         dvb_frontend_get(fe);
2725
2726         sema_init(&fepriv->sem, 1);
2727         init_waitqueue_head (&fepriv->wait_queue);
2728         init_waitqueue_head (&fepriv->events.wait_queue);
2729         mutex_init(&fepriv->events.mtx);
2730         fe->dvb = dvb;
2731         fepriv->inversion = INVERSION_OFF;
2732
2733         dev_info(fe->dvb->device,
2734                         "DVB: registering adapter %i frontend %i (%s)...\n",
2735                         fe->dvb->num, fe->id, fe->ops.info.name);
2736
2737         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2738                              fe, DVB_DEVICE_FRONTEND, 0);
2739
2740         /*
2741          * Initialize the cache to the proper values according with the
2742          * first supported delivery system (ops->delsys[0])
2743          */
2744
2745         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2746         dvb_frontend_clear_cache(fe);
2747
2748         mutex_unlock(&frontend_mutex);
2749         return 0;
2750 }
2751 EXPORT_SYMBOL(dvb_register_frontend);
2752
2753 int dvb_unregister_frontend(struct dvb_frontend* fe)
2754 {
2755         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2756         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2757
2758         mutex_lock(&frontend_mutex);
2759         dvb_frontend_stop(fe);
2760         dvb_remove_device(fepriv->dvbdev);
2761
2762         /* fe is invalid now */
2763         mutex_unlock(&frontend_mutex);
2764         dvb_frontend_put(fe);
2765         return 0;
2766 }
2767 EXPORT_SYMBOL(dvb_unregister_frontend);
2768
2769 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
2770                                         void (*release)(struct dvb_frontend *fe))
2771 {
2772         if (release) {
2773                 release(fe);
2774 #ifdef CONFIG_MEDIA_ATTACH
2775                 dvb_detach(release);
2776 #endif
2777         }
2778 }
2779
2780 void dvb_frontend_detach(struct dvb_frontend* fe)
2781 {
2782         dvb_frontend_invoke_release(fe, fe->ops.release_sec);
2783         dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
2784         dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
2785         dvb_frontend_invoke_release(fe, fe->ops.detach);
2786         dvb_frontend_put(fe);
2787 }
2788 EXPORT_SYMBOL(dvb_frontend_detach);