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 dvb_frontend *fe)
 145 {
 146         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 147
 148         if (fepriv)
 149                 dvb_device_put(fepriv->dvbdev);
 150
 151         dvb_frontend_invoke_release(fe, fe->ops.release);
 152
 153         if (fepriv)
 154                 kfree(fepriv);
 155 }
 156
 157 static void dvb_frontend_free(struct kref *ref)
 158 {
 159         struct dvb_frontend *fe =
 160                 container_of(ref, struct dvb_frontend, refcount);
 161
 162         __dvb_frontend_free(fe);
 163 }
 164
 165 static void dvb_frontend_put(struct dvb_frontend *fe)
 166 {
 167         /*
 168          * Check if the frontend was registered, as otherwise
 169          * kref was not initialized yet.
 170          */
 171         if (fe->frontend_priv)
 172                 kref_put(&fe->refcount, dvb_frontend_free);
 173         else
 174                 __dvb_frontend_free(fe);
 175 }
 176
 177 static void dvb_frontend_get(struct dvb_frontend *fe)
 178 {
 179         kref_get(&fe->refcount);
 180 }
 181
 182 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 183 static int dtv_get_frontend(struct dvb_frontend *fe,
 184                             struct dtv_frontend_properties *c,
 185                             struct dvb_frontend_parameters *p_out);
 186 static int
 187 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 188                                 const struct dtv_frontend_properties *c,
 189                                 struct dvb_frontend_parameters *p);
 190
 191 static bool has_get_frontend(struct dvb_frontend *fe)
 192 {
 193         return fe->ops.get_frontend != NULL;
 194 }
 195
 196 /*
 197  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 198  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 199  * otherwise, a DVBv3 call will fail.
 200  */
 201 enum dvbv3_emulation_type {
 202         DVBV3_UNKNOWN,
 203         DVBV3_QPSK,
 204         DVBV3_QAM,
 205         DVBV3_OFDM,
 206         DVBV3_ATSC,
 207 };
 208
 209 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 210 {
 211         switch (delivery_system) {
 212         case SYS_DVBC_ANNEX_A:
 213         case SYS_DVBC_ANNEX_C:
 214                 return DVBV3_QAM;
 215         case SYS_DVBS:
 216         case SYS_DVBS2:
 217         case SYS_TURBO:
 218         case SYS_ISDBS:
 219         case SYS_DSS:
 220                 return DVBV3_QPSK;
 221         case SYS_DVBT:
 222         case SYS_DVBT2:
 223         case SYS_ISDBT:
 224         case SYS_DTMB:
 225                 return DVBV3_OFDM;
 226         case SYS_ATSC:
 227         case SYS_ATSCMH:
 228         case SYS_DVBC_ANNEX_B:
 229                 return DVBV3_ATSC;
 230         case SYS_UNDEFINED:
 231         case SYS_ISDBC:
 232         case SYS_DVBH:
 233         case SYS_DAB:
 234         default:
 235                 /*
 236                  * Doesn't know how to emulate those types and/or
 237                  * there's no frontend driver from this type yet
 238                  * with some emulation code, so, we're not sure yet how
 239                  * to handle them, or they're not compatible with a DVBv3 call.
 240                  */
 241                 return DVBV3_UNKNOWN;
 242         }
 243 }
 244
 245 static void dvb_frontend_add_event(struct dvb_frontend *fe,
 246                                    enum fe_status status)
 247 {
 248         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 249         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 250         struct dvb_fe_events *events = &fepriv->events;
 251         struct dvb_frontend_event *e;
 252         int wp;
 253
 254         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 255
 256         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 257                 dtv_get_frontend(fe, c, &fepriv->parameters_out);
 258
 259         mutex_lock(&events->mtx);
 260
 261         wp = (events->eventw + 1) % MAX_EVENT;
 262         if (wp == events->eventr) {
 263                 events->overflow = 1;
 264                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 265         }
 266
 267         e = &events->events[events->eventw];
 268         e->status = status;
 269         e->parameters = fepriv->parameters_out;
 270
 271         events->eventw = wp;
 272
 273         mutex_unlock(&events->mtx);
 274
 275         wake_up_interruptible (&events->wait_queue);
 276 }
 277
 278 static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv,
 279                                    struct dvb_fe_events *events)
 280 {
 281         int ret;
 282
 283         up(&fepriv->sem);
 284         ret = events->eventw != events->eventr;
 285         down(&fepriv->sem);
 286
 287         return ret;
 288 }
 289
 290 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 291                                   struct dvb_frontend_event *event, int flags)
 292 {
 293         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 294         struct dvb_fe_events *events = &fepriv->events;
 295
 296         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 297
 298         if (events->overflow) {
 299                 events->overflow = 0;
 300                 return -EOVERFLOW;
 301         }
 302
 303         if (events->eventw == events->eventr) {
 304                 struct wait_queue_entry wait;
 305                 int ret = 0;
 306
 307                 if (flags & O_NONBLOCK)
 308                         return -EWOULDBLOCK;
 309
 310                 init_waitqueue_entry(&wait, current);
 311                 add_wait_queue(&events->wait_queue, &wait);
 312                 while (!dvb_frontend_test_event(fepriv, events)) {
 313                         wait_woken(&wait, TASK_INTERRUPTIBLE, 0);
 314                         if (signal_pending(current)) {
 315                                 ret = -ERESTARTSYS;
 316                                 break;
 317                         }
 318                 }
 319                 remove_wait_queue(&events->wait_queue, &wait);
 320                 if (ret < 0)
 321                         return ret;
 322         }
 323
 324         mutex_lock(&events->mtx);
 325         *event = events->events[events->eventr];
 326         events->eventr = (events->eventr + 1) % MAX_EVENT;
 327         mutex_unlock(&events->mtx);
 328
 329         return 0;
 330 }
 331
 332 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 333 {
 334         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 335         struct dvb_fe_events *events = &fepriv->events;
 336
 337         mutex_lock(&events->mtx);
 338         events->eventr = events->eventw;
 339         mutex_unlock(&events->mtx);
 340 }
 341
 342 static void dvb_frontend_init(struct dvb_frontend *fe)
 343 {
 344         dev_dbg(fe->dvb->device,
 345                         "%s: initialising adapter %i frontend %i (%s)...\n",
 346                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 347
 348         if (fe->ops.init)
 349                 fe->ops.init(fe);
 350         if (fe->ops.tuner_ops.init) {
 351                 if (fe->ops.i2c_gate_ctrl)
 352                         fe->ops.i2c_gate_ctrl(fe, 1);
 353                 fe->ops.tuner_ops.init(fe);
 354                 if (fe->ops.i2c_gate_ctrl)
 355                         fe->ops.i2c_gate_ctrl(fe, 0);
 356         }
 357 }
 358
 359 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 360 {
 361         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 362
 363         fepriv->reinitialise = 1;
 364         dvb_frontend_wakeup(fe);
 365 }
 366 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 367
 368 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 369 {
 370         int q2;
 371         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 372
 373         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 374
 375         if (locked)
 376                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 377         else
 378                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 379
 380         q2 = fepriv->quality - 128;
 381         q2 *= q2;
 382
 383         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 384 }
 385
 386 /**
 387  * Performs automatic twiddling of frontend parameters.
 388  *
 389  * @param fe The frontend concerned.
 390  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 391  * @returns Number of complete iterations that have been performed.
 392  */
 393 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 394 {
 395         int autoinversion;
 396         int ready = 0;
 397         int fe_set_err = 0;
 398         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 399         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 400         int original_inversion = c->inversion;
 401         u32 original_frequency = c->frequency;
 402
 403         /* are we using autoinversion? */
 404         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 405                          (c->inversion == INVERSION_AUTO));
 406
 407         /* setup parameters correctly */
 408         while(!ready) {
 409                 /* calculate the lnb_drift */
 410                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 411
 412                 /* wrap the auto_step if we've exceeded the maximum drift */
 413                 if (fepriv->lnb_drift > fepriv->max_drift) {
 414                         fepriv->auto_step = 0;
 415                         fepriv->auto_sub_step = 0;
 416                         fepriv->lnb_drift = 0;
 417                 }
 418
 419                 /* perform inversion and +/- zigzag */
 420                 switch(fepriv->auto_sub_step) {
 421                 case 0:
 422                         /* try with the current inversion and current drift setting */
 423                         ready = 1;
 424                         break;
 425
 426                 case 1:
 427                         if (!autoinversion) break;
 428
 429                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 430                         ready = 1;
 431                         break;
 432
 433                 case 2:
 434                         if (fepriv->lnb_drift == 0) break;
 435
 436                         fepriv->lnb_drift = -fepriv->lnb_drift;
 437                         ready = 1;
 438                         break;
 439
 440                 case 3:
 441                         if (fepriv->lnb_drift == 0) break;
 442                         if (!autoinversion) break;
 443
 444                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 445                         fepriv->lnb_drift = -fepriv->lnb_drift;
 446                         ready = 1;
 447                         break;
 448
 449                 default:
 450                         fepriv->auto_step++;
 451                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 452                         break;
 453                 }
 454
 455                 if (!ready) fepriv->auto_sub_step++;
 456         }
 457
 458         /* if this attempt would hit where we started, indicate a complete
 459          * iteration has occurred */
 460         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 461             (fepriv->auto_sub_step == 0) && check_wrapped) {
 462                 return 1;
 463         }
 464
 465         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 466                         "auto_sub_step:%i started_auto_step:%i\n",
 467                         __func__, fepriv->lnb_drift, fepriv->inversion,
 468                         fepriv->auto_step, fepriv->auto_sub_step,
 469                         fepriv->started_auto_step);
 470
 471         /* set the frontend itself */
 472         c->frequency += fepriv->lnb_drift;
 473         if (autoinversion)
 474                 c->inversion = fepriv->inversion;
 475         tmp = *c;
 476         if (fe->ops.set_frontend)
 477                 fe_set_err = fe->ops.set_frontend(fe);
 478         *c = tmp;
 479         if (fe_set_err < 0) {
 480                 fepriv->state = FESTATE_ERROR;
 481                 return fe_set_err;
 482         }
 483
 484         c->frequency = original_frequency;
 485         c->inversion = original_inversion;
 486
 487         fepriv->auto_sub_step++;
 488         return 0;
 489 }
 490
 491 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 492 {
 493         enum fe_status s = FE_NONE;
 494         int retval = 0;
 495         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 496         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 497
 498         /* if we've got no parameters, just keep idling */
 499         if (fepriv->state & FESTATE_IDLE) {
 500                 fepriv->delay = 3*HZ;
 501                 fepriv->quality = 0;
 502                 return;
 503         }
 504
 505         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 506         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 507                 if (fepriv->state & FESTATE_RETUNE) {
 508                         tmp = *c;
 509                         if (fe->ops.set_frontend)
 510                                 retval = fe->ops.set_frontend(fe);
 511                         *c = tmp;
 512                         if (retval < 0)
 513                                 fepriv->state = FESTATE_ERROR;
 514                         else
 515                                 fepriv->state = FESTATE_TUNED;
 516                 }
 517                 fepriv->delay = 3*HZ;
 518                 fepriv->quality = 0;
 519                 return;
 520         }
 521
 522         /* get the frontend status */
 523         if (fepriv->state & FESTATE_RETUNE) {
 524                 s = 0;
 525         } else {
 526                 if (fe->ops.read_status)
 527                         fe->ops.read_status(fe, &s);
 528                 if (s != fepriv->status) {
 529                         dvb_frontend_add_event(fe, s);
 530                         fepriv->status = s;
 531                 }
 532         }
 533
 534         /* if we're not tuned, and we have a lock, move to the TUNED state */
 535         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 536                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 537                 fepriv->state = FESTATE_TUNED;
 538
 539                 /* if we're tuned, then we have determined the correct inversion */
 540                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 541                     (c->inversion == INVERSION_AUTO)) {
 542                         c->inversion = fepriv->inversion;
 543                 }
 544                 return;
 545         }
 546
 547         /* if we are tuned already, check we're still locked */
 548         if (fepriv->state & FESTATE_TUNED) {
 549                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 550
 551                 /* we're tuned, and the lock is still good... */
 552                 if (s & FE_HAS_LOCK) {
 553                         return;
 554                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 555                         fepriv->state = FESTATE_ZIGZAG_FAST;
 556                         fepriv->started_auto_step = fepriv->auto_step;
 557                         fepriv->check_wrapped = 0;
 558                 }
 559         }
 560
 561         /* don't actually do anything if we're in the LOSTLOCK state,
 562          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 563         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 564             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 565                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 566                 return;
 567         }
 568
 569         /* don't do anything if we're in the DISEQC state, since this
 570          * might be someone with a motorized dish controlled by DISEQC.
 571          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 572         if (fepriv->state & FESTATE_DISEQC) {
 573                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 574                 return;
 575         }
 576
 577         /* if we're in the RETUNE state, set everything up for a brand
 578          * new scan, keeping the current inversion setting, as the next
 579          * tune is _very_ likely to require the same */
 580         if (fepriv->state & FESTATE_RETUNE) {
 581                 fepriv->lnb_drift = 0;
 582                 fepriv->auto_step = 0;
 583                 fepriv->auto_sub_step = 0;
 584                 fepriv->started_auto_step = 0;
 585                 fepriv->check_wrapped = 0;
 586         }
 587
 588         /* fast zigzag. */
 589         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 590                 fepriv->delay = fepriv->min_delay;
 591
 592                 /* perform a tune */
 593                 retval = dvb_frontend_swzigzag_autotune(fe,
 594                                                         fepriv->check_wrapped);
 595                 if (retval < 0) {
 596                         return;
 597                 } else if (retval) {
 598                         /* OK, if we've run out of trials at the fast speed.
 599                          * Drop back to slow for the _next_ attempt */
 600                         fepriv->state = FESTATE_SEARCHING_SLOW;
 601                         fepriv->started_auto_step = fepriv->auto_step;
 602                         return;
 603                 }
 604                 fepriv->check_wrapped = 1;
 605
 606                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 607                  * This ensures we cannot return from an
 608                  * FE_SET_FRONTEND ioctl before the first frontend tune
 609                  * occurs */
 610                 if (fepriv->state & FESTATE_RETUNE) {
 611                         fepriv->state = FESTATE_TUNING_FAST;
 612                 }
 613         }
 614
 615         /* slow zigzag */
 616         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 617                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 618
 619                 /* Note: don't bother checking for wrapping; we stay in this
 620                  * state until we get a lock */
 621                 dvb_frontend_swzigzag_autotune(fe, 0);
 622         }
 623 }
 624
 625 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 626 {
 627         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 628
 629         if (fe->exit != DVB_FE_NO_EXIT)
 630                 return 1;
 631
 632         if (fepriv->dvbdev->writers == 1)
 633                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 634                                   dvb_shutdown_timeout * HZ))
 635                         return 1;
 636
 637         return 0;
 638 }
 639
 640 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 641 {
 642         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 643
 644         if (fepriv->wakeup) {
 645                 fepriv->wakeup = 0;
 646                 return 1;
 647         }
 648         return dvb_frontend_is_exiting(fe);
 649 }
 650
 651 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 652 {
 653         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 654
 655         fepriv->wakeup = 1;
 656         wake_up_interruptible(&fepriv->wait_queue);
 657 }
 658
 659 static int dvb_frontend_thread(void *data)
 660 {
 661         struct dvb_frontend *fe = data;
 662         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 663         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 664         enum fe_status s = FE_NONE;
 665         enum dvbfe_algo algo;
 666         bool re_tune = false;
 667         bool semheld = false;
 668
 669         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 670
 671         fepriv->check_wrapped = 0;
 672         fepriv->quality = 0;
 673         fepriv->delay = 3*HZ;
 674         fepriv->status = 0;
 675         fepriv->wakeup = 0;
 676         fepriv->reinitialise = 0;
 677
 678         dvb_frontend_init(fe);
 679
 680         set_freezable();
 681         while (1) {
 682                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 683 restart:
 684                 wait_event_interruptible_timeout(fepriv->wait_queue,
 685                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 686                                 || freezing(current),
 687                         fepriv->delay);
 688
 689                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 690                         /* got signal or quitting */
 691                         if (!down_interruptible(&fepriv->sem))
 692                                 semheld = true;
 693                         fe->exit = DVB_FE_NORMAL_EXIT;
 694                         break;
 695                 }
 696
 697                 if (try_to_freeze())
 698                         goto restart;
 699
 700                 if (down_interruptible(&fepriv->sem))
 701                         break;
 702
 703                 if (fepriv->reinitialise) {
 704                         dvb_frontend_init(fe);
 705                         if (fe->ops.set_tone && fepriv->tone != -1)
 706                                 fe->ops.set_tone(fe, fepriv->tone);
 707                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 708                                 fe->ops.set_voltage(fe, fepriv->voltage);
 709                         fepriv->reinitialise = 0;
 710                 }
 711
 712                 /* do an iteration of the tuning loop */
 713                 if (fe->ops.get_frontend_algo) {
 714                         algo = fe->ops.get_frontend_algo(fe);
 715                         switch (algo) {
 716                         case DVBFE_ALGO_HW:
 717                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 718
 719                                 if (fepriv->state & FESTATE_RETUNE) {
 720                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 721                                         re_tune = true;
 722                                         fepriv->state = FESTATE_TUNED;
 723                                 } else {
 724                                         re_tune = false;
 725                                 }
 726
 727                                 if (fe->ops.tune)
 728                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 729
 730                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 731                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 732                                         dvb_frontend_add_event(fe, s);
 733                                         fepriv->status = s;
 734                                 }
 735                                 break;
 736                         case DVBFE_ALGO_SW:
 737                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 738                                 dvb_frontend_swzigzag(fe);
 739                                 break;
 740                         case DVBFE_ALGO_CUSTOM:
 741                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 742                                 if (fepriv->state & FESTATE_RETUNE) {
 743                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 744                                         fepriv->state = FESTATE_TUNED;
 745                                 }
 746                                 /* Case where we are going to search for a carrier
 747                                  * User asked us to retune again for some reason, possibly
 748                                  * requesting a search with a new set of parameters
 749                                  */
 750                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 751                                         if (fe->ops.search) {
 752                                                 fepriv->algo_status = fe->ops.search(fe);
 753                                                 /* We did do a search as was requested, the flags are
 754                                                  * now unset as well and has the flags wrt to search.
 755                                                  */
 756                                         } else {
 757                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 758                                         }
 759                                 }
 760                                 /* Track the carrier if the search was successful */
 761                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 762                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 763                                         fepriv->delay = HZ / 2;
 764                                 }
 765                                 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
 766                                 fe->ops.read_status(fe, &s);
 767                                 if (s != fepriv->status) {
 768                                         dvb_frontend_add_event(fe, s); /* update event list */
 769                                         fepriv->status = s;
 770                                         if (!(s & FE_HAS_LOCK)) {
 771                                                 fepriv->delay = HZ / 10;
 772                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 773                                         } else {
 774                                                 fepriv->delay = 60 * HZ;
 775                                         }
 776                                 }
 777                                 break;
 778                         default:
 779                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 780                                 break;
 781                         }
 782                 } else {
 783                         dvb_frontend_swzigzag(fe);
 784                 }
 785         }
 786
 787         if (dvb_powerdown_on_sleep) {
 788                 if (fe->ops.set_voltage)
 789                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 790                 if (fe->ops.tuner_ops.sleep) {
 791                         if (fe->ops.i2c_gate_ctrl)
 792                                 fe->ops.i2c_gate_ctrl(fe, 1);
 793                         fe->ops.tuner_ops.sleep(fe);
 794                         if (fe->ops.i2c_gate_ctrl)
 795                                 fe->ops.i2c_gate_ctrl(fe, 0);
 796                 }
 797                 if (fe->ops.sleep)
 798                         fe->ops.sleep(fe);
 799         }
 800
 801         fepriv->thread = NULL;
 802         if (kthread_should_stop())
 803                 fe->exit = DVB_FE_DEVICE_REMOVED;
 804         else
 805                 fe->exit = DVB_FE_NO_EXIT;
 806         mb();
 807
 808         if (semheld)
 809                 up(&fepriv->sem);
 810         dvb_frontend_wakeup(fe);
 811         return 0;
 812 }
 813
 814 static void dvb_frontend_stop(struct dvb_frontend *fe)
 815 {
 816         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 817
 818         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 819
 820         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 821                 fe->exit = DVB_FE_NORMAL_EXIT;
 822         mb();
 823
 824         if (!fepriv->thread)
 825                 return;
 826
 827         kthread_stop(fepriv->thread);
 828
 829         sema_init(&fepriv->sem, 1);
 830         fepriv->state = FESTATE_IDLE;
 831
 832         /* paranoia check in case a signal arrived */
 833         if (fepriv->thread)
 834                 dev_warn(fe->dvb->device,
 835                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 836                                 fepriv->thread);
 837 }
 838
 839 /*
 840  * Sleep for the amount of time given by add_usec parameter
 841  *
 842  * This needs to be as precise as possible, as it affects the detection of
 843  * the dish tone command at the satellite subsystem. The precision is improved
 844  * by using a scheduled msleep followed by udelay for the remainder.
 845  */
 846 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
 847 {
 848         s32 delta;
 849
 850         *waketime = ktime_add_us(*waketime, add_usec);
 851         delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 852         if (delta > 2500) {
 853                 msleep((delta - 1500) / 1000);
 854                 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 855         }
 856         if (delta > 0)
 857                 udelay(delta);
 858 }
 859 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 860
 861 static int dvb_frontend_start(struct dvb_frontend *fe)
 862 {
 863         int ret;
 864         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 865         struct task_struct *fe_thread;
 866
 867         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 868
 869         if (fepriv->thread) {
 870                 if (fe->exit == DVB_FE_NO_EXIT)
 871                         return 0;
 872                 else
 873                         dvb_frontend_stop (fe);
 874         }
 875
 876         if (signal_pending(current))
 877                 return -EINTR;
 878         if (down_interruptible (&fepriv->sem))
 879                 return -EINTR;
 880
 881         fepriv->state = FESTATE_IDLE;
 882         fe->exit = DVB_FE_NO_EXIT;
 883         fepriv->thread = NULL;
 884         mb();
 885
 886         fe_thread = kthread_run(dvb_frontend_thread, fe,
 887                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 888         if (IS_ERR(fe_thread)) {
 889                 ret = PTR_ERR(fe_thread);
 890                 dev_warn(fe->dvb->device,
 891                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 892                                 ret);
 893                 up(&fepriv->sem);
 894                 return ret;
 895         }
 896         fepriv->thread = fe_thread;
 897         return 0;
 898 }
 899
 900 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 901                                         u32 *freq_min, u32 *freq_max)
 902 {
 903         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 904
 905         if (fe->ops.info.frequency_max == 0)
 906                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 907         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 908                 *freq_max = fe->ops.info.frequency_max;
 909         else
 910                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 911
 912         if (*freq_min == 0 || *freq_max == 0)
 913                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 914                                 fe->dvb->num, fe->id);
 915 }
 916
 917 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 918 {
 919         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 920         u32 freq_min;
 921         u32 freq_max;
 922
 923         /* range check: frequency */
 924         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 925         if ((freq_min && c->frequency < freq_min) ||
 926             (freq_max && c->frequency > freq_max)) {
 927                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 928                                 fe->dvb->num, fe->id, c->frequency,
 929                                 freq_min, freq_max);
 930                 return -EINVAL;
 931         }
 932
 933         /* range check: symbol rate */
 934         switch (c->delivery_system) {
 935         case SYS_DVBS:
 936         case SYS_DVBS2:
 937         case SYS_TURBO:
 938         case SYS_DVBC_ANNEX_A:
 939         case SYS_DVBC_ANNEX_C:
 940                 if ((fe->ops.info.symbol_rate_min &&
 941                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 942                     (fe->ops.info.symbol_rate_max &&
 943                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 944                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 945                                         fe->dvb->num, fe->id, c->symbol_rate,
 946                                         fe->ops.info.symbol_rate_min,
 947                                         fe->ops.info.symbol_rate_max);
 948                         return -EINVAL;
 949                 }
 950         default:
 951                 break;
 952         }
 953
 954         return 0;
 955 }
 956
 957 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 958 {
 959         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 960         int i;
 961         u32 delsys;
 962
 963         delsys = c->delivery_system;
 964         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
 965         c->delivery_system = delsys;
 966
 967         c->state = DTV_CLEAR;
 968
 969         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
 970                         __func__, c->delivery_system);
 971
 972         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 973         c->bandwidth_hz = 0;    /* AUTO */
 974         c->guard_interval = GUARD_INTERVAL_AUTO;
 975         c->hierarchy = HIERARCHY_AUTO;
 976         c->symbol_rate = 0;
 977         c->code_rate_HP = FEC_AUTO;
 978         c->code_rate_LP = FEC_AUTO;
 979         c->fec_inner = FEC_AUTO;
 980         c->rolloff = ROLLOFF_AUTO;
 981         c->voltage = SEC_VOLTAGE_OFF;
 982         c->sectone = SEC_TONE_OFF;
 983         c->pilot = PILOT_AUTO;
 984
 985         c->isdbt_partial_reception = 0;
 986         c->isdbt_sb_mode = 0;
 987         c->isdbt_sb_subchannel = 0;
 988         c->isdbt_sb_segment_idx = 0;
 989         c->isdbt_sb_segment_count = 0;
 990         c->isdbt_layer_enabled = 0;
 991         for (i = 0; i < 3; i++) {
 992                 c->layer[i].fec = FEC_AUTO;
 993                 c->layer[i].modulation = QAM_AUTO;
 994                 c->layer[i].interleaving = 0;
 995                 c->layer[i].segment_count = 0;
 996         }
 997
 998         c->stream_id = NO_STREAM_ID_FILTER;
 999
1000         switch (c->delivery_system) {
1001         case SYS_DVBS:
1002         case SYS_DVBS2:
1003         case SYS_TURBO:
1004                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1005                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1006                 break;
1007         case SYS_ATSC:
1008                 c->modulation = VSB_8;
1009                 break;
1010         case SYS_ISDBS:
1011                 c->symbol_rate = 28860000;
1012                 c->rolloff = ROLLOFF_35;
1013                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1014                 break;
1015         default:
1016                 c->modulation = QAM_AUTO;
1017                 break;
1018         }
1019
1020         c->lna = LNA_AUTO;
1021
1022         return 0;
1023 }
1024
1025 #define _DTV_CMD(n, s, b) \
1026 [n] = { \
1027         .name = #n, \
1028         .cmd  = n, \
1029         .set  = s,\
1030         .buffer = b \
1031 }
1032
1033 struct dtv_cmds_h {
1034         char    *name;          /* A display name for debugging purposes */
1035
1036         __u32   cmd;            /* A unique ID */
1037
1038         /* Flags */
1039         __u32   set:1;          /* Either a set or get property */
1040         __u32   buffer:1;       /* Does this property use the buffer? */
1041         __u32   reserved:30;    /* Align */
1042 };
1043
1044 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1045         _DTV_CMD(DTV_TUNE, 1, 0),
1046         _DTV_CMD(DTV_CLEAR, 1, 0),
1047
1048         /* Set */
1049         _DTV_CMD(DTV_FREQUENCY, 1, 0),
1050         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1051         _DTV_CMD(DTV_MODULATION, 1, 0),
1052         _DTV_CMD(DTV_INVERSION, 1, 0),
1053         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1054         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1055         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1056         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1057         _DTV_CMD(DTV_TONE, 1, 0),
1058         _DTV_CMD(DTV_PILOT, 1, 0),
1059         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1060         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1061         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1062         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1063         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1064         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1065         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1066         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1067
1068         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1069         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1070         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1071         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1072         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1073         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1074         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1075         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1076         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1077         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1078         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1079         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1080         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1081         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1082         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1083         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1084         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1085         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1086
1087         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1088         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1089         _DTV_CMD(DTV_LNA, 1, 0),
1090
1091         /* Get */
1092         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1093         _DTV_CMD(DTV_API_VERSION, 0, 0),
1094
1095         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1096
1097         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1098         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1099
1100         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1101         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1102         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1103         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1104         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1105         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1106         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1107         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1108         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1109         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1110         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1111         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1112         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1113
1114         /* Statistics API */
1115         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1116         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1117         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1118         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1119         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1120         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1121         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1122         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1123 };
1124
1125 static void dtv_property_dump(struct dvb_frontend *fe,
1126                               bool is_set,
1127                               struct dtv_property *tvp)
1128 {
1129         int i;
1130
1131         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1132                 dev_warn(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x undefined\n",
1133                                 __func__,
1134                                 is_set ? "SET" : "GET",
1135                                 tvp->cmd);
1136                 return;
1137         }
1138
1139         dev_dbg(fe->dvb->device, "%s: %s tvp.cmd    = 0x%08x (%s)\n", __func__,
1140                 is_set ? "SET" : "GET",
1141                 tvp->cmd,
1142                 dtv_cmds[tvp->cmd].name);
1143
1144         if (dtv_cmds[tvp->cmd].buffer) {
1145                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1146                         __func__, tvp->u.buffer.len);
1147
1148                 for(i = 0; i < tvp->u.buffer.len; i++)
1149                         dev_dbg(fe->dvb->device,
1150                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1151                                         __func__, i, tvp->u.buffer.data[i]);
1152         } else {
1153                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1154                                 tvp->u.data);
1155         }
1156 }
1157
1158 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1159  * drivers can use a single set_frontend tuning function, regardless of whether
1160  * it's being used for the legacy or new API, reducing code and complexity.
1161  */
1162 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1163                                    struct dtv_frontend_properties *c,
1164                                    const struct dvb_frontend_parameters *p)
1165 {
1166         c->frequency = p->frequency;
1167         c->inversion = p->inversion;
1168
1169         switch (dvbv3_type(c->delivery_system)) {
1170         case DVBV3_QPSK:
1171                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1172                 c->symbol_rate = p->u.qpsk.symbol_rate;
1173                 c->fec_inner = p->u.qpsk.fec_inner;
1174                 break;
1175         case DVBV3_QAM:
1176                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1177                 c->symbol_rate = p->u.qam.symbol_rate;
1178                 c->fec_inner = p->u.qam.fec_inner;
1179                 c->modulation = p->u.qam.modulation;
1180                 break;
1181         case DVBV3_OFDM:
1182                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1183
1184                 switch (p->u.ofdm.bandwidth) {
1185                 case BANDWIDTH_10_MHZ:
1186                         c->bandwidth_hz = 10000000;
1187                         break;
1188                 case BANDWIDTH_8_MHZ:
1189                         c->bandwidth_hz = 8000000;
1190                         break;
1191                 case BANDWIDTH_7_MHZ:
1192                         c->bandwidth_hz = 7000000;
1193                         break;
1194                 case BANDWIDTH_6_MHZ:
1195                         c->bandwidth_hz = 6000000;
1196                         break;
1197                 case BANDWIDTH_5_MHZ:
1198                         c->bandwidth_hz = 5000000;
1199                         break;
1200                 case BANDWIDTH_1_712_MHZ:
1201                         c->bandwidth_hz = 1712000;
1202                         break;
1203                 case BANDWIDTH_AUTO:
1204                         c->bandwidth_hz = 0;
1205                 }
1206
1207                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1208                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1209                 c->modulation = p->u.ofdm.constellation;
1210                 c->transmission_mode = p->u.ofdm.transmission_mode;
1211                 c->guard_interval = p->u.ofdm.guard_interval;
1212                 c->hierarchy = p->u.ofdm.hierarchy_information;
1213                 break;
1214         case DVBV3_ATSC:
1215                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1216                 c->modulation = p->u.vsb.modulation;
1217                 if (c->delivery_system == SYS_ATSCMH)
1218                         break;
1219                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1220                         c->delivery_system = SYS_ATSC;
1221                 else
1222                         c->delivery_system = SYS_DVBC_ANNEX_B;
1223                 break;
1224         case DVBV3_UNKNOWN:
1225                 dev_err(fe->dvb->device,
1226                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1227                                 __func__, c->delivery_system);
1228                 return -EINVAL;
1229         }
1230
1231         return 0;
1232 }
1233
1234 /* Ensure the cached values are set correctly in the frontend
1235  * legacy tuning structures, for the advanced tuning API.
1236  */
1237 static int
1238 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1239                                 const struct dtv_frontend_properties *c,
1240                                 struct dvb_frontend_parameters *p)
1241 {
1242         p->frequency = c->frequency;
1243         p->inversion = c->inversion;
1244
1245         switch (dvbv3_type(c->delivery_system)) {
1246         case DVBV3_UNKNOWN:
1247                 dev_err(fe->dvb->device,
1248                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1249                                 __func__, c->delivery_system);
1250                 return -EINVAL;
1251         case DVBV3_QPSK:
1252                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1253                 p->u.qpsk.symbol_rate = c->symbol_rate;
1254                 p->u.qpsk.fec_inner = c->fec_inner;
1255                 break;
1256         case DVBV3_QAM:
1257                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1258                 p->u.qam.symbol_rate = c->symbol_rate;
1259                 p->u.qam.fec_inner = c->fec_inner;
1260                 p->u.qam.modulation = c->modulation;
1261                 break;
1262         case DVBV3_OFDM:
1263                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1264                 switch (c->bandwidth_hz) {
1265                 case 10000000:
1266                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1267                         break;
1268                 case 8000000:
1269                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1270                         break;
1271                 case 7000000:
1272                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1273                         break;
1274                 case 6000000:
1275                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1276                         break;
1277                 case 5000000:
1278                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1279                         break;
1280                 case 1712000:
1281                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1282                         break;
1283                 case 0:
1284                 default:
1285                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1286                 }
1287                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1288                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1289                 p->u.ofdm.constellation = c->modulation;
1290                 p->u.ofdm.transmission_mode = c->transmission_mode;
1291                 p->u.ofdm.guard_interval = c->guard_interval;
1292                 p->u.ofdm.hierarchy_information = c->hierarchy;
1293                 break;
1294         case DVBV3_ATSC:
1295                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1296                 p->u.vsb.modulation = c->modulation;
1297                 break;
1298         }
1299         return 0;
1300 }
1301
1302 /**
1303  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1304  * @fe:         struct dvb_frontend pointer
1305  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1306  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1307  *
1308  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1309  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1310  * If p_out is not null, it will update the DVBv3 params pointed by it.
1311  */
1312 static int dtv_get_frontend(struct dvb_frontend *fe,
1313                             struct dtv_frontend_properties *c,
1314                             struct dvb_frontend_parameters *p_out)
1315 {
1316         int r;
1317
1318         if (fe->ops.get_frontend) {
1319                 r = fe->ops.get_frontend(fe, c);
1320                 if (unlikely(r < 0))
1321                         return r;
1322                 if (p_out)
1323                         dtv_property_legacy_params_sync(fe, c, p_out);
1324                 return 0;
1325         }
1326
1327         /* As everything is in cache, get_frontend fops are always supported */
1328         return 0;
1329 }
1330
1331 static int dvb_frontend_ioctl_legacy(struct file *file,
1332                         unsigned int cmd, void *parg);
1333 static int dvb_frontend_ioctl_properties(struct file *file,
1334                         unsigned int cmd, void *parg);
1335
1336 static int dtv_property_process_get(struct dvb_frontend *fe,
1337                                     const struct dtv_frontend_properties *c,
1338                                     struct dtv_property *tvp,
1339                                     struct file *file)
1340 {
1341         int r, ncaps;
1342
1343         switch(tvp->cmd) {
1344         case DTV_ENUM_DELSYS:
1345                 ncaps = 0;
1346                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1347                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1348                         ncaps++;
1349                 }
1350                 tvp->u.buffer.len = ncaps;
1351                 break;
1352         case DTV_FREQUENCY:
1353                 tvp->u.data = c->frequency;
1354                 break;
1355         case DTV_MODULATION:
1356                 tvp->u.data = c->modulation;
1357                 break;
1358         case DTV_BANDWIDTH_HZ:
1359                 tvp->u.data = c->bandwidth_hz;
1360                 break;
1361         case DTV_INVERSION:
1362                 tvp->u.data = c->inversion;
1363                 break;
1364         case DTV_SYMBOL_RATE:
1365                 tvp->u.data = c->symbol_rate;
1366                 break;
1367         case DTV_INNER_FEC:
1368                 tvp->u.data = c->fec_inner;
1369                 break;
1370         case DTV_PILOT:
1371                 tvp->u.data = c->pilot;
1372                 break;
1373         case DTV_ROLLOFF:
1374                 tvp->u.data = c->rolloff;
1375                 break;
1376         case DTV_DELIVERY_SYSTEM:
1377                 tvp->u.data = c->delivery_system;
1378                 break;
1379         case DTV_VOLTAGE:
1380                 tvp->u.data = c->voltage;
1381                 break;
1382         case DTV_TONE:
1383                 tvp->u.data = c->sectone;
1384                 break;
1385         case DTV_API_VERSION:
1386                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1387                 break;
1388         case DTV_CODE_RATE_HP:
1389                 tvp->u.data = c->code_rate_HP;
1390                 break;
1391         case DTV_CODE_RATE_LP:
1392                 tvp->u.data = c->code_rate_LP;
1393                 break;
1394         case DTV_GUARD_INTERVAL:
1395                 tvp->u.data = c->guard_interval;
1396                 break;
1397         case DTV_TRANSMISSION_MODE:
1398                 tvp->u.data = c->transmission_mode;
1399                 break;
1400         case DTV_HIERARCHY:
1401                 tvp->u.data = c->hierarchy;
1402                 break;
1403         case DTV_INTERLEAVING:
1404                 tvp->u.data = c->interleaving;
1405                 break;
1406
1407         /* ISDB-T Support here */
1408         case DTV_ISDBT_PARTIAL_RECEPTION:
1409                 tvp->u.data = c->isdbt_partial_reception;
1410                 break;
1411         case DTV_ISDBT_SOUND_BROADCASTING:
1412                 tvp->u.data = c->isdbt_sb_mode;
1413                 break;
1414         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1415                 tvp->u.data = c->isdbt_sb_subchannel;
1416                 break;
1417         case DTV_ISDBT_SB_SEGMENT_IDX:
1418                 tvp->u.data = c->isdbt_sb_segment_idx;
1419                 break;
1420         case DTV_ISDBT_SB_SEGMENT_COUNT:
1421                 tvp->u.data = c->isdbt_sb_segment_count;
1422                 break;
1423         case DTV_ISDBT_LAYER_ENABLED:
1424                 tvp->u.data = c->isdbt_layer_enabled;
1425                 break;
1426         case DTV_ISDBT_LAYERA_FEC:
1427                 tvp->u.data = c->layer[0].fec;
1428                 break;
1429         case DTV_ISDBT_LAYERA_MODULATION:
1430                 tvp->u.data = c->layer[0].modulation;
1431                 break;
1432         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1433                 tvp->u.data = c->layer[0].segment_count;
1434                 break;
1435         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1436                 tvp->u.data = c->layer[0].interleaving;
1437                 break;
1438         case DTV_ISDBT_LAYERB_FEC:
1439                 tvp->u.data = c->layer[1].fec;
1440                 break;
1441         case DTV_ISDBT_LAYERB_MODULATION:
1442                 tvp->u.data = c->layer[1].modulation;
1443                 break;
1444         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1445                 tvp->u.data = c->layer[1].segment_count;
1446                 break;
1447         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1448                 tvp->u.data = c->layer[1].interleaving;
1449                 break;
1450         case DTV_ISDBT_LAYERC_FEC:
1451                 tvp->u.data = c->layer[2].fec;
1452                 break;
1453         case DTV_ISDBT_LAYERC_MODULATION:
1454                 tvp->u.data = c->layer[2].modulation;
1455                 break;
1456         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1457                 tvp->u.data = c->layer[2].segment_count;
1458                 break;
1459         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1460                 tvp->u.data = c->layer[2].interleaving;
1461                 break;
1462
1463         /* Multistream support */
1464         case DTV_STREAM_ID:
1465         case DTV_DVBT2_PLP_ID_LEGACY:
1466                 tvp->u.data = c->stream_id;
1467                 break;
1468
1469         /* ATSC-MH */
1470         case DTV_ATSCMH_FIC_VER:
1471                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1472                 break;
1473         case DTV_ATSCMH_PARADE_ID:
1474                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1475                 break;
1476         case DTV_ATSCMH_NOG:
1477                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1478                 break;
1479         case DTV_ATSCMH_TNOG:
1480                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1481                 break;
1482         case DTV_ATSCMH_SGN:
1483                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1484                 break;
1485         case DTV_ATSCMH_PRC:
1486                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1487                 break;
1488         case DTV_ATSCMH_RS_FRAME_MODE:
1489                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1490                 break;
1491         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1492                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1493                 break;
1494         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1495                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1496                 break;
1497         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1498                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1499                 break;
1500         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1501                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1502                 break;
1503         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1504                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1505                 break;
1506         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1507                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1508                 break;
1509         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1510                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1511                 break;
1512         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1513                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1514                 break;
1515
1516         case DTV_LNA:
1517                 tvp->u.data = c->lna;
1518                 break;
1519
1520         /* Fill quality measures */
1521         case DTV_STAT_SIGNAL_STRENGTH:
1522                 tvp->u.st = c->strength;
1523                 break;
1524         case DTV_STAT_CNR:
1525                 tvp->u.st = c->cnr;
1526                 break;
1527         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1528                 tvp->u.st = c->pre_bit_error;
1529                 break;
1530         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1531                 tvp->u.st = c->pre_bit_count;
1532                 break;
1533         case DTV_STAT_POST_ERROR_BIT_COUNT:
1534                 tvp->u.st = c->post_bit_error;
1535                 break;
1536         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1537                 tvp->u.st = c->post_bit_count;
1538                 break;
1539         case DTV_STAT_ERROR_BLOCK_COUNT:
1540                 tvp->u.st = c->block_error;
1541                 break;
1542         case DTV_STAT_TOTAL_BLOCK_COUNT:
1543                 tvp->u.st = c->block_count;
1544                 break;
1545         default:
1546                 dev_dbg(fe->dvb->device,
1547                         "%s: FE property %d doesn't exist\n",
1548                         __func__, tvp->cmd);
1549                 return -EINVAL;
1550         }
1551
1552         /* Allow the frontend to override outgoing properties */
1553         if (fe->ops.get_property) {
1554                 r = fe->ops.get_property(fe, tvp);
1555                 if (r < 0)
1556                         return r;
1557         }
1558
1559         dtv_property_dump(fe, false, tvp);
1560
1561         return 0;
1562 }
1563
1564 static int dtv_set_frontend(struct dvb_frontend *fe);
1565
1566 static bool is_dvbv3_delsys(u32 delsys)
1567 {
1568         return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1569                (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1570 }
1571
1572 /**
1573  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1574  * @fe:                 struct frontend;
1575  * @delsys:                     DVBv5 type that will be used for emulation
1576  *
1577  * Provides emulation for delivery systems that are compatible with the old
1578  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1579  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1580  * parameters are compatible with DVB-S spec.
1581  */
1582 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1583 {
1584         int i;
1585         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1586
1587         c->delivery_system = delsys;
1588
1589         /*
1590          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1591          */
1592         if (c->delivery_system == SYS_ISDBT) {
1593                 dev_dbg(fe->dvb->device,
1594                         "%s: Using defaults for SYS_ISDBT\n",
1595                         __func__);
1596
1597                 if (!c->bandwidth_hz)
1598                         c->bandwidth_hz = 6000000;
1599
1600                 c->isdbt_partial_reception = 0;
1601                 c->isdbt_sb_mode = 0;
1602                 c->isdbt_sb_subchannel = 0;
1603                 c->isdbt_sb_segment_idx = 0;
1604                 c->isdbt_sb_segment_count = 0;
1605                 c->isdbt_layer_enabled = 7;
1606                 for (i = 0; i < 3; i++) {
1607                         c->layer[i].fec = FEC_AUTO;
1608                         c->layer[i].modulation = QAM_AUTO;
1609                         c->layer[i].interleaving = 0;
1610                         c->layer[i].segment_count = 0;
1611                 }
1612         }
1613         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1614                 __func__, c->delivery_system);
1615
1616         return 0;
1617 }
1618
1619 /**
1620  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1621  * @fe:                 frontend struct
1622  * @desired_system:     delivery system requested by the user
1623  *
1624  * A DVBv5 call know what's the desired system it wants. So, set it.
1625  *
1626  * There are, however, a few known issues with early DVBv5 applications that
1627  * are also handled by this logic:
1628  *
1629  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1630  *    This is an API violation, but, as we don't want to break userspace,
1631  *    convert it to the first supported delivery system.
1632  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1633  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1634  *    ISDB-T provided backward compat with DVB-T.
1635  */
1636 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1637                                      u32 desired_system)
1638 {
1639         int ncaps;
1640         u32 delsys = SYS_UNDEFINED;
1641         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1642         enum dvbv3_emulation_type type;
1643
1644         /*
1645          * It was reported that some old DVBv5 applications were
1646          * filling delivery_system with SYS_UNDEFINED. If this happens,
1647          * assume that the application wants to use the first supported
1648          * delivery system.
1649          */
1650         if (desired_system == SYS_UNDEFINED)
1651                 desired_system = fe->ops.delsys[0];
1652
1653         /*
1654          * This is a DVBv5 call. So, it likely knows the supported
1655          * delivery systems. So, check if the desired delivery system is
1656          * supported
1657          */
1658         ncaps = 0;
1659         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1660                 if (fe->ops.delsys[ncaps] == desired_system) {
1661                         c->delivery_system = desired_system;
1662                         dev_dbg(fe->dvb->device,
1663                                         "%s: Changing delivery system to %d\n",
1664                                         __func__, desired_system);
1665                         return 0;
1666                 }
1667                 ncaps++;
1668         }
1669
1670         /*
1671          * The requested delivery system isn't supported. Maybe userspace
1672          * is requesting a DVBv3 compatible delivery system.
1673          *
1674          * The emulation only works if the desired system is one of the
1675          * delivery systems supported by DVBv3 API
1676          */
1677         if (!is_dvbv3_delsys(desired_system)) {
1678                 dev_dbg(fe->dvb->device,
1679                         "%s: Delivery system %d not supported.\n",
1680                         __func__, desired_system);
1681                 return -EINVAL;
1682         }
1683
1684         type = dvbv3_type(desired_system);
1685
1686         /*
1687         * Get the last non-DVBv3 delivery system that has the same type
1688         * of the desired system
1689         */
1690         ncaps = 0;
1691         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1692                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1693                         delsys = fe->ops.delsys[ncaps];
1694                 ncaps++;
1695         }
1696
1697         /* There's nothing compatible with the desired delivery system */
1698         if (delsys == SYS_UNDEFINED) {
1699                 dev_dbg(fe->dvb->device,
1700                         "%s: Delivery system %d not supported on emulation mode.\n",
1701                         __func__, desired_system);
1702                 return -EINVAL;
1703         }
1704
1705         dev_dbg(fe->dvb->device,
1706                 "%s: Using delivery system %d emulated as if it were %d\n",
1707                 __func__, delsys, desired_system);
1708
1709         return emulate_delivery_system(fe, desired_system);
1710 }
1711
1712 /**
1713  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1714  * @fe: frontend struct
1715  *
1716  * A DVBv3 call doesn't know what's the desired system it wants. It also
1717  * doesn't allow to switch between different types. Due to that, userspace
1718  * should use DVBv5 instead.
1719  * However, in order to avoid breaking userspace API, limited backward
1720  * compatibility support is provided.
1721  *
1722  * There are some delivery systems that are incompatible with DVBv3 calls.
1723  *
1724  * This routine should work fine for frontends that support just one delivery
1725  * system.
1726  *
1727  * For frontends that support multiple frontends:
1728  * 1) It defaults to use the first supported delivery system. There's an
1729  *    userspace application that allows changing it at runtime;
1730  *
1731  * 2) If the current delivery system is not compatible with DVBv3, it gets
1732  *    the first one that it is compatible.
1733  *
1734  * NOTE: in order for this to work with applications like Kaffeine that
1735  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1736  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1737  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1738  *      to DVB-S.
1739  */
1740 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1741 {
1742         int ncaps;
1743         u32 delsys = SYS_UNDEFINED;
1744         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1745
1746         /* If not set yet, defaults to the first supported delivery system */
1747         if (c->delivery_system == SYS_UNDEFINED)
1748                 c->delivery_system = fe->ops.delsys[0];
1749
1750         /*
1751          * Trivial case: just use the current one, if it already a DVBv3
1752          * delivery system
1753          */
1754         if (is_dvbv3_delsys(c->delivery_system)) {
1755                 dev_dbg(fe->dvb->device,
1756                                 "%s: Using delivery system to %d\n",
1757                                 __func__, c->delivery_system);
1758                 return 0;
1759         }
1760
1761         /*
1762          * Seek for the first delivery system that it is compatible with a
1763          * DVBv3 standard
1764          */
1765         ncaps = 0;
1766         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1767                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1768                         delsys = fe->ops.delsys[ncaps];
1769                         break;
1770                 }
1771                 ncaps++;
1772         }
1773         if (delsys == SYS_UNDEFINED) {
1774                 dev_dbg(fe->dvb->device,
1775                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1776                         __func__);
1777                 return -EINVAL;
1778         }
1779         return emulate_delivery_system(fe, delsys);
1780 }
1781
1782 static int dtv_property_process_set(struct dvb_frontend *fe,
1783                                     struct dtv_property *tvp,
1784                                     struct file *file)
1785 {
1786         int r = 0;
1787         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1788
1789         /* Allow the frontend to validate incoming properties */
1790         if (fe->ops.set_property) {
1791                 r = fe->ops.set_property(fe, tvp);
1792                 if (r < 0)
1793                         return r;
1794         }
1795
1796         dtv_property_dump(fe, true, tvp);
1797
1798         switch(tvp->cmd) {
1799         case DTV_CLEAR:
1800                 /*
1801                  * Reset a cache of data specific to the frontend here. This does
1802                  * not effect hardware.
1803                  */
1804                 dvb_frontend_clear_cache(fe);
1805                 break;
1806         case DTV_TUNE:
1807                 /* interpret the cache of data, build either a traditional frontend
1808                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1809                  * ioctl.
1810                  */
1811                 c->state = tvp->cmd;
1812                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1813                                 __func__);
1814
1815                 r = dtv_set_frontend(fe);
1816                 break;
1817         case DTV_FREQUENCY:
1818                 c->frequency = tvp->u.data;
1819                 break;
1820         case DTV_MODULATION:
1821                 c->modulation = tvp->u.data;
1822                 break;
1823         case DTV_BANDWIDTH_HZ:
1824                 c->bandwidth_hz = tvp->u.data;
1825                 break;
1826         case DTV_INVERSION:
1827                 c->inversion = tvp->u.data;
1828                 break;
1829         case DTV_SYMBOL_RATE:
1830                 c->symbol_rate = tvp->u.data;
1831                 break;
1832         case DTV_INNER_FEC:
1833                 c->fec_inner = tvp->u.data;
1834                 break;
1835         case DTV_PILOT:
1836                 c->pilot = tvp->u.data;
1837                 break;
1838         case DTV_ROLLOFF:
1839                 c->rolloff = tvp->u.data;
1840                 break;
1841         case DTV_DELIVERY_SYSTEM:
1842                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1843                 break;
1844         case DTV_VOLTAGE:
1845                 c->voltage = tvp->u.data;
1846                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1847                         (void *)c->voltage);
1848                 break;
1849         case DTV_TONE:
1850                 c->sectone = tvp->u.data;
1851                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1852                         (void *)c->sectone);
1853                 break;
1854         case DTV_CODE_RATE_HP:
1855                 c->code_rate_HP = tvp->u.data;
1856                 break;
1857         case DTV_CODE_RATE_LP:
1858                 c->code_rate_LP = tvp->u.data;
1859                 break;
1860         case DTV_GUARD_INTERVAL:
1861                 c->guard_interval = tvp->u.data;
1862                 break;
1863         case DTV_TRANSMISSION_MODE:
1864                 c->transmission_mode = tvp->u.data;
1865                 break;
1866         case DTV_HIERARCHY:
1867                 c->hierarchy = tvp->u.data;
1868                 break;
1869         case DTV_INTERLEAVING:
1870                 c->interleaving = tvp->u.data;
1871                 break;
1872
1873         /* ISDB-T Support here */
1874         case DTV_ISDBT_PARTIAL_RECEPTION:
1875                 c->isdbt_partial_reception = tvp->u.data;
1876                 break;
1877         case DTV_ISDBT_SOUND_BROADCASTING:
1878                 c->isdbt_sb_mode = tvp->u.data;
1879                 break;
1880         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1881                 c->isdbt_sb_subchannel = tvp->u.data;
1882                 break;
1883         case DTV_ISDBT_SB_SEGMENT_IDX:
1884                 c->isdbt_sb_segment_idx = tvp->u.data;
1885                 break;
1886         case DTV_ISDBT_SB_SEGMENT_COUNT:
1887                 c->isdbt_sb_segment_count = tvp->u.data;
1888                 break;
1889         case DTV_ISDBT_LAYER_ENABLED:
1890                 c->isdbt_layer_enabled = tvp->u.data;
1891                 break;
1892         case DTV_ISDBT_LAYERA_FEC:
1893                 c->layer[0].fec = tvp->u.data;
1894                 break;
1895         case DTV_ISDBT_LAYERA_MODULATION:
1896                 c->layer[0].modulation = tvp->u.data;
1897                 break;
1898         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1899                 c->layer[0].segment_count = tvp->u.data;
1900                 break;
1901         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1902                 c->layer[0].interleaving = tvp->u.data;
1903                 break;
1904         case DTV_ISDBT_LAYERB_FEC:
1905                 c->layer[1].fec = tvp->u.data;
1906                 break;
1907         case DTV_ISDBT_LAYERB_MODULATION:
1908                 c->layer[1].modulation = tvp->u.data;
1909                 break;
1910         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1911                 c->layer[1].segment_count = tvp->u.data;
1912                 break;
1913         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1914                 c->layer[1].interleaving = tvp->u.data;
1915                 break;
1916         case DTV_ISDBT_LAYERC_FEC:
1917                 c->layer[2].fec = tvp->u.data;
1918                 break;
1919         case DTV_ISDBT_LAYERC_MODULATION:
1920                 c->layer[2].modulation = tvp->u.data;
1921                 break;
1922         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1923                 c->layer[2].segment_count = tvp->u.data;
1924                 break;
1925         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1926                 c->layer[2].interleaving = tvp->u.data;
1927                 break;
1928
1929         /* Multistream support */
1930         case DTV_STREAM_ID:
1931         case DTV_DVBT2_PLP_ID_LEGACY:
1932                 c->stream_id = tvp->u.data;
1933                 break;
1934
1935         /* ATSC-MH */
1936         case DTV_ATSCMH_PARADE_ID:
1937                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1938                 break;
1939         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1940                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1941                 break;
1942
1943         case DTV_LNA:
1944                 c->lna = tvp->u.data;
1945                 if (fe->ops.set_lna)
1946                         r = fe->ops.set_lna(fe);
1947                 if (r < 0)
1948                         c->lna = LNA_AUTO;
1949                 break;
1950
1951         default:
1952                 return -EINVAL;
1953         }
1954
1955         return r;
1956 }
1957
1958 static int dvb_frontend_ioctl(struct file *file,
1959                         unsigned int cmd, void *parg)
1960 {
1961         struct dvb_device *dvbdev = file->private_data;
1962         struct dvb_frontend *fe = dvbdev->priv;
1963         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1964         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1965         int err = -EOPNOTSUPP;
1966
1967         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1968         if (down_interruptible(&fepriv->sem))
1969                 return -ERESTARTSYS;
1970
1971         if (fe->exit != DVB_FE_NO_EXIT) {
1972                 up(&fepriv->sem);
1973                 return -ENODEV;
1974         }
1975
1976         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1977             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1978              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1979                 up(&fepriv->sem);
1980                 return -EPERM;
1981         }
1982
1983         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1984                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1985         else {
1986                 c->state = DTV_UNDEFINED;
1987                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1988         }
1989
1990         up(&fepriv->sem);
1991         return err;
1992 }
1993
1994 static int dvb_frontend_ioctl_properties(struct file *file,
1995                         unsigned int cmd, void *parg)
1996 {
1997         struct dvb_device *dvbdev = file->private_data;
1998         struct dvb_frontend *fe = dvbdev->priv;
1999         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2000         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2001         int err = 0;
2002
2003         struct dtv_properties *tvps = parg;
2004         struct dtv_property *tvp = NULL;
2005         int i;
2006
2007         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2008
2009         if (cmd == FE_SET_PROPERTY) {
2010                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2011                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2012
2013                 /* Put an arbitrary limit on the number of messages that can
2014                  * be sent at once */
2015                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2016                         return -EINVAL;
2017
2018                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2019                 if (IS_ERR(tvp))
2020                         return PTR_ERR(tvp);
2021
2022                 for (i = 0; i < tvps->num; i++) {
2023                         err = dtv_property_process_set(fe, tvp + i, file);
2024                         if (err < 0)
2025                                 goto out;
2026                         (tvp + i)->result = err;
2027                 }
2028
2029                 if (c->state == DTV_TUNE)
2030                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
2031
2032         } else if (cmd == FE_GET_PROPERTY) {
2033                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2034
2035                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2036                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2037
2038                 /* Put an arbitrary limit on the number of messages that can
2039                  * be sent at once */
2040                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2041                         return -EINVAL;
2042
2043                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2044                 if (IS_ERR(tvp))
2045                         return PTR_ERR(tvp);
2046
2047                 /*
2048                  * Let's use our own copy of property cache, in order to
2049                  * avoid mangling with DTV zigzag logic, as drivers might
2050                  * return crap, if they don't check if the data is available
2051                  * before updating the properties cache.
2052                  */
2053                 if (fepriv->state != FESTATE_IDLE) {
2054                         err = dtv_get_frontend(fe, &getp, NULL);
2055                         if (err < 0)
2056                                 goto out;
2057                 }
2058                 for (i = 0; i < tvps->num; i++) {
2059                         err = dtv_property_process_get(fe, &getp, tvp + i, file);
2060                         if (err < 0)
2061                                 goto out;
2062                         (tvp + i)->result = err;
2063                 }
2064
2065                 if (copy_to_user((void __user *)tvps->props, tvp,
2066                                  tvps->num * sizeof(struct dtv_property))) {
2067                         err = -EFAULT;
2068                         goto out;
2069                 }
2070
2071         } else
2072                 err = -EOPNOTSUPP;
2073
2074 out:
2075         kfree(tvp);
2076         return err;
2077 }
2078
2079 static int dtv_set_frontend(struct dvb_frontend *fe)
2080 {
2081         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2082         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2083         struct dvb_frontend_tune_settings fetunesettings;
2084         u32 rolloff = 0;
2085
2086         if (dvb_frontend_check_parameters(fe) < 0)
2087                 return -EINVAL;
2088
2089         /*
2090          * Initialize output parameters to match the values given by
2091          * the user. FE_SET_FRONTEND triggers an initial frontend event
2092          * with status = 0, which copies output parameters to userspace.
2093          */
2094         dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2095
2096         /*
2097          * Be sure that the bandwidth will be filled for all
2098          * non-satellite systems, as tuners need to know what
2099          * low pass/Nyquist half filter should be applied, in
2100          * order to avoid inter-channel noise.
2101          *
2102          * ISDB-T and DVB-T/T2 already sets bandwidth.
2103          * ATSC and DVB-C don't set, so, the core should fill it.
2104          *
2105          * On DVB-C Annex A and C, the bandwidth is a function of
2106          * the roll-off and symbol rate. Annex B defines different
2107          * roll-off factors depending on the modulation. Fortunately,
2108          * Annex B is only used with 6MHz, so there's no need to
2109          * calculate it.
2110          *
2111          * While not officially supported, a side effect of handling it at
2112          * the cache level is that a program could retrieve the bandwidth
2113          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2114          */
2115         switch (c->delivery_system) {
2116         case SYS_ATSC:
2117         case SYS_DVBC_ANNEX_B:
2118                 c->bandwidth_hz = 6000000;
2119                 break;
2120         case SYS_DVBC_ANNEX_A:
2121                 rolloff = 115;
2122                 break;
2123         case SYS_DVBC_ANNEX_C:
2124                 rolloff = 113;
2125                 break;
2126         case SYS_DVBS:
2127         case SYS_TURBO:
2128         case SYS_ISDBS:
2129                 rolloff = 135;
2130                 break;
2131         case SYS_DVBS2:
2132                 switch (c->rolloff) {
2133                 case ROLLOFF_20:
2134                         rolloff = 120;
2135                         break;
2136                 case ROLLOFF_25:
2137                         rolloff = 125;
2138                         break;
2139                 default:
2140                 case ROLLOFF_35:
2141                         rolloff = 135;
2142                 }
2143                 break;
2144         default:
2145                 break;
2146         }
2147         if (rolloff)
2148                 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2149
2150         /* force auto frequency inversion if requested */
2151         if (dvb_force_auto_inversion)
2152                 c->inversion = INVERSION_AUTO;
2153
2154         /*
2155          * without hierarchical coding code_rate_LP is irrelevant,
2156          * so we tolerate the otherwise invalid FEC_NONE setting
2157          */
2158         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2159                 c->code_rate_LP = FEC_AUTO;
2160
2161         /* get frontend-specific tuning settings */
2162         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2163         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2164                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2165                 fepriv->max_drift = fetunesettings.max_drift;
2166                 fepriv->step_size = fetunesettings.step_size;
2167         } else {
2168                 /* default values */
2169                 switch (c->delivery_system) {
2170                 case SYS_DVBS:
2171                 case SYS_DVBS2:
2172                 case SYS_ISDBS:
2173                 case SYS_TURBO:
2174                 case SYS_DVBC_ANNEX_A:
2175                 case SYS_DVBC_ANNEX_C:
2176                         fepriv->min_delay = HZ / 20;
2177                         fepriv->step_size = c->symbol_rate / 16000;
2178                         fepriv->max_drift = c->symbol_rate / 2000;
2179                         break;
2180                 case SYS_DVBT:
2181                 case SYS_DVBT2:
2182                 case SYS_ISDBT:
2183                 case SYS_DTMB:
2184                         fepriv->min_delay = HZ / 20;
2185                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2186                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2187                         break;
2188                 default:
2189                         /*
2190                          * FIXME: This sounds wrong! if freqency_stepsize is
2191                          * defined by the frontend, why not use it???
2192                          */
2193                         fepriv->min_delay = HZ / 20;
2194                         fepriv->step_size = 0; /* no zigzag */
2195                         fepriv->max_drift = 0;
2196                         break;
2197                 }
2198         }
2199         if (dvb_override_tune_delay > 0)
2200                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2201
2202         fepriv->state = FESTATE_RETUNE;
2203
2204         /* Request the search algorithm to search */
2205         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2206
2207         dvb_frontend_clear_events(fe);
2208         dvb_frontend_add_event(fe, 0);
2209         dvb_frontend_wakeup(fe);
2210         fepriv->status = 0;
2211
2212         return 0;
2213 }
2214
2215
2216 static int dvb_frontend_ioctl_legacy(struct file *file,
2217                         unsigned int cmd, void *parg)
2218 {
2219         struct dvb_device *dvbdev = file->private_data;
2220         struct dvb_frontend *fe = dvbdev->priv;
2221         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2222         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2223         int err = -EOPNOTSUPP;
2224
2225         switch (cmd) {
2226         case FE_GET_INFO: {
2227                 struct dvb_frontend_info* info = parg;
2228
2229                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2230                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2231
2232                 /*
2233                  * Associate the 4 delivery systems supported by DVBv3
2234                  * API with their DVBv5 counterpart. For the other standards,
2235                  * use the closest type, assuming that it would hopefully
2236                  * work with a DVBv3 application.
2237                  * It should be noticed that, on multi-frontend devices with
2238                  * different types (terrestrial and cable, for example),
2239                  * a pure DVBv3 application won't be able to use all delivery
2240                  * systems. Yet, changing the DVBv5 cache to the other delivery
2241                  * system should be enough for making it work.
2242                  */
2243                 switch (dvbv3_type(c->delivery_system)) {
2244                 case DVBV3_QPSK:
2245                         info->type = FE_QPSK;
2246                         break;
2247                 case DVBV3_ATSC:
2248                         info->type = FE_ATSC;
2249                         break;
2250                 case DVBV3_QAM:
2251                         info->type = FE_QAM;
2252                         break;
2253                 case DVBV3_OFDM:
2254                         info->type = FE_OFDM;
2255                         break;
2256                 default:
2257                         dev_err(fe->dvb->device,
2258                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2259                                         __func__, c->delivery_system);
2260                         fe->ops.info.type = FE_OFDM;
2261                 }
2262                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2263                                  __func__, c->delivery_system, fe->ops.info.type);
2264
2265                 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2266                 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2267                         info->caps |= FE_CAN_INVERSION_AUTO;
2268                 err = 0;
2269                 break;
2270         }
2271
2272         case FE_READ_STATUS: {
2273                 enum fe_status *status = parg;
2274
2275                 /* if retune was requested but hasn't occurred yet, prevent
2276                  * that user get signal state from previous tuning */
2277                 if (fepriv->state == FESTATE_RETUNE ||
2278                     fepriv->state == FESTATE_ERROR) {
2279                         err=0;
2280                         *status = 0;
2281                         break;
2282                 }
2283
2284                 if (fe->ops.read_status)
2285                         err = fe->ops.read_status(fe, status);
2286                 break;
2287         }
2288
2289         case FE_READ_BER:
2290                 if (fe->ops.read_ber) {
2291                         if (fepriv->thread)
2292                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2293                         else
2294                                 err = -EAGAIN;
2295                 }
2296                 break;
2297
2298         case FE_READ_SIGNAL_STRENGTH:
2299                 if (fe->ops.read_signal_strength) {
2300                         if (fepriv->thread)
2301                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2302                         else
2303                                 err = -EAGAIN;
2304                 }
2305                 break;
2306
2307         case FE_READ_SNR:
2308                 if (fe->ops.read_snr) {
2309                         if (fepriv->thread)
2310                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2311                         else
2312                                 err = -EAGAIN;
2313                 }
2314                 break;
2315
2316         case FE_READ_UNCORRECTED_BLOCKS:
2317                 if (fe->ops.read_ucblocks) {
2318                         if (fepriv->thread)
2319                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2320                         else
2321                                 err = -EAGAIN;
2322                 }
2323                 break;
2324
2325         case FE_DISEQC_RESET_OVERLOAD:
2326                 if (fe->ops.diseqc_reset_overload) {
2327                         err = fe->ops.diseqc_reset_overload(fe);
2328                         fepriv->state = FESTATE_DISEQC;
2329                         fepriv->status = 0;
2330                 }
2331                 break;
2332
2333         case FE_DISEQC_SEND_MASTER_CMD:
2334                 if (fe->ops.diseqc_send_master_cmd) {
2335                         struct dvb_diseqc_master_cmd *cmd = parg;
2336
2337                         if (cmd->msg_len > sizeof(cmd->msg)) {
2338                                 err = -EINVAL;
2339                                 break;
2340                         }
2341                         err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2342                         fepriv->state = FESTATE_DISEQC;
2343                         fepriv->status = 0;
2344                 }
2345                 break;
2346
2347         case FE_DISEQC_SEND_BURST:
2348                 if (fe->ops.diseqc_send_burst) {
2349                         err = fe->ops.diseqc_send_burst(fe,
2350                                                 (enum fe_sec_mini_cmd)parg);
2351                         fepriv->state = FESTATE_DISEQC;
2352                         fepriv->status = 0;
2353                 }
2354                 break;
2355
2356         case FE_SET_TONE:
2357                 if (fe->ops.set_tone) {
2358                         err = fe->ops.set_tone(fe,
2359                                                (enum fe_sec_tone_mode)parg);
2360                         fepriv->tone = (enum fe_sec_tone_mode)parg;
2361                         fepriv->state = FESTATE_DISEQC;
2362                         fepriv->status = 0;
2363                 }
2364                 break;
2365
2366         case FE_SET_VOLTAGE:
2367                 if (fe->ops.set_voltage) {
2368                         err = fe->ops.set_voltage(fe,
2369                                                   (enum fe_sec_voltage)parg);
2370                         fepriv->voltage = (enum fe_sec_voltage)parg;
2371                         fepriv->state = FESTATE_DISEQC;
2372                         fepriv->status = 0;
2373                 }
2374                 break;
2375
2376         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2377                 if (fe->ops.dishnetwork_send_legacy_command) {
2378                         err = fe->ops.dishnetwork_send_legacy_command(fe,
2379                                                          (unsigned long)parg);
2380                         fepriv->state = FESTATE_DISEQC;
2381                         fepriv->status = 0;
2382                 } else if (fe->ops.set_voltage) {
2383                         /*
2384                          * NOTE: This is a fallback condition.  Some frontends
2385                          * (stv0299 for instance) take longer than 8msec to
2386                          * respond to a set_voltage command.  Those switches
2387                          * need custom routines to switch properly.  For all
2388                          * other frontends, the following should work ok.
2389                          * Dish network legacy switches (as used by Dish500)
2390                          * are controlled by sending 9-bit command words
2391                          * spaced 8msec apart.
2392                          * the actual command word is switch/port dependent
2393                          * so it is up to the userspace application to send
2394                          * the right command.
2395                          * The command must always start with a '0' after
2396                          * initialization, so parg is 8 bits and does not
2397                          * include the initialization or start bit
2398                          */
2399                         unsigned long swcmd = ((unsigned long) parg) << 1;
2400                         ktime_t nexttime;
2401                         ktime_t tv[10];
2402                         int i;
2403                         u8 last = 1;
2404                         if (dvb_frontend_debug)
2405                                 dprintk("%s switch command: 0x%04lx\n",
2406                                         __func__, swcmd);
2407                         nexttime = ktime_get_boottime();
2408                         if (dvb_frontend_debug)
2409                                 tv[0] = nexttime;
2410                         /* before sending a command, initialize by sending
2411                          * a 32ms 18V to the switch
2412                          */
2413                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2414                         dvb_frontend_sleep_until(&nexttime, 32000);
2415
2416                         for (i = 0; i < 9; i++) {
2417                                 if (dvb_frontend_debug)
2418                                         tv[i+1] = ktime_get_boottime();
2419                                 if ((swcmd & 0x01) != last) {
2420                                         /* set voltage to (last ? 13V : 18V) */
2421                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2422                                         last = (last) ? 0 : 1;
2423                                 }
2424                                 swcmd = swcmd >> 1;
2425                                 if (i != 8)
2426                                         dvb_frontend_sleep_until(&nexttime, 8000);
2427                         }
2428                         if (dvb_frontend_debug) {
2429                                 dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n",
2430                                         __func__, fe->dvb->num);
2431                                 for (i = 1; i < 10; i++)
2432                                         pr_info("%d: %d\n", i,
2433                                         (int) ktime_us_delta(tv[i], tv[i-1]));
2434                         }
2435                         err = 0;
2436                         fepriv->state = FESTATE_DISEQC;
2437                         fepriv->status = 0;
2438                 }
2439                 break;
2440
2441         case FE_DISEQC_RECV_SLAVE_REPLY:
2442                 if (fe->ops.diseqc_recv_slave_reply)
2443                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2444                 break;
2445
2446         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2447                 if (fe->ops.enable_high_lnb_voltage)
2448                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2449                 break;
2450
2451         case FE_SET_FRONTEND:
2452                 err = dvbv3_set_delivery_system(fe);
2453                 if (err)
2454                         break;
2455
2456                 err = dtv_property_cache_sync(fe, c, parg);
2457                 if (err)
2458                         break;
2459                 err = dtv_set_frontend(fe);
2460                 break;
2461         case FE_GET_EVENT:
2462                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2463                 break;
2464
2465         case FE_GET_FRONTEND: {
2466                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2467
2468                 /*
2469                  * Let's use our own copy of property cache, in order to
2470                  * avoid mangling with DTV zigzag logic, as drivers might
2471                  * return crap, if they don't check if the data is available
2472                  * before updating the properties cache.
2473                  */
2474                 err = dtv_get_frontend(fe, &getp, parg);
2475                 break;
2476         }
2477         case FE_SET_FRONTEND_TUNE_MODE:
2478                 fepriv->tune_mode_flags = (unsigned long) parg;
2479                 err = 0;
2480                 break;
2481         }
2482
2483         return err;
2484 }
2485
2486
2487 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2488 {
2489         struct dvb_device *dvbdev = file->private_data;
2490         struct dvb_frontend *fe = dvbdev->priv;
2491         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2492
2493         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2494
2495         poll_wait (file, &fepriv->events.wait_queue, wait);
2496
2497         if (fepriv->events.eventw != fepriv->events.eventr)
2498                 return (POLLIN | POLLRDNORM | POLLPRI);
2499
2500         return 0;
2501 }
2502
2503 static int dvb_frontend_open(struct inode *inode, struct file *file)
2504 {
2505         struct dvb_device *dvbdev = file->private_data;
2506         struct dvb_frontend *fe = dvbdev->priv;
2507         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2508         struct dvb_adapter *adapter = fe->dvb;
2509         int ret;
2510
2511         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2512         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2513                 return -ENODEV;
2514
2515         if (adapter->mfe_shared) {
2516                 mutex_lock (&adapter->mfe_lock);
2517
2518                 if (adapter->mfe_dvbdev == NULL)
2519                         adapter->mfe_dvbdev = dvbdev;
2520
2521                 else if (adapter->mfe_dvbdev != dvbdev) {
2522                         struct dvb_device
2523                                 *mfedev = adapter->mfe_dvbdev;
2524                         struct dvb_frontend
2525                                 *mfe = mfedev->priv;
2526                         struct dvb_frontend_private
2527                                 *mfepriv = mfe->frontend_priv;
2528                         int mferetry = (dvb_mfe_wait_time << 1);
2529
2530                         mutex_unlock (&adapter->mfe_lock);
2531                         while (mferetry-- && (mfedev->users != -1 ||
2532                                         mfepriv->thread != NULL)) {
2533                                 if(msleep_interruptible(500)) {
2534                                         if(signal_pending(current))
2535                                                 return -EINTR;
2536                                 }
2537                         }
2538
2539                         mutex_lock (&adapter->mfe_lock);
2540                         if(adapter->mfe_dvbdev != dvbdev) {
2541                                 mfedev = adapter->mfe_dvbdev;
2542                                 mfe = mfedev->priv;
2543                                 mfepriv = mfe->frontend_priv;
2544                                 if (mfedev->users != -1 ||
2545                                                 mfepriv->thread != NULL) {
2546                                         mutex_unlock (&adapter->mfe_lock);
2547                                         return -EBUSY;
2548                                 }
2549                                 adapter->mfe_dvbdev = dvbdev;
2550                         }
2551                 }
2552         }
2553
2554         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2555                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2556                         goto err0;
2557
2558                 /* If we took control of the bus, we need to force
2559                    reinitialization.  This is because many ts_bus_ctrl()
2560                    functions strobe the RESET pin on the demod, and if the
2561                    frontend thread already exists then the dvb_init() routine
2562                    won't get called (which is what usually does initial
2563                    register configuration). */
2564                 fepriv->reinitialise = 1;
2565         }
2566
2567         if ((ret = dvb_generic_open (inode, file)) < 0)
2568                 goto err1;
2569
2570         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2571                 /* normal tune mode when opened R/W */
2572                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2573                 fepriv->tone = -1;
2574                 fepriv->voltage = -1;
2575
2576 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2577                 if (fe->dvb->mdev) {
2578                         mutex_lock(&fe->dvb->mdev->graph_mutex);
2579                         if (fe->dvb->mdev->enable_source)
2580                                 ret = fe->dvb->mdev->enable_source(
2581                                                            dvbdev->entity,
2582                                                            &fepriv->pipe);
2583                         mutex_unlock(&fe->dvb->mdev->graph_mutex);
2584                         if (ret) {
2585                                 dev_err(fe->dvb->device,
2586                                         "Tuner is busy. Error %d\n", ret);
2587                                 goto err2;
2588                         }
2589                 }
2590 #endif
2591                 ret = dvb_frontend_start (fe);
2592                 if (ret)
2593                         goto err3;
2594
2595                 /*  empty event queue */
2596                 fepriv->events.eventr = fepriv->events.eventw = 0;
2597         }
2598
2599         dvb_frontend_get(fe);
2600
2601         if (adapter->mfe_shared)
2602                 mutex_unlock (&adapter->mfe_lock);
2603         return ret;
2604
2605 err3:
2606 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2607         if (fe->dvb->mdev) {
2608                 mutex_lock(&fe->dvb->mdev->graph_mutex);
2609                 if (fe->dvb->mdev->disable_source)
2610                         fe->dvb->mdev->disable_source(dvbdev->entity);
2611                 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2612         }
2613 err2:
2614 #endif
2615         dvb_generic_release(inode, file);
2616 err1:
2617         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2618                 fe->ops.ts_bus_ctrl(fe, 0);
2619 err0:
2620         if (adapter->mfe_shared)
2621                 mutex_unlock (&adapter->mfe_lock);
2622         return ret;
2623 }
2624
2625 static int dvb_frontend_release(struct inode *inode, struct file *file)
2626 {
2627         struct dvb_device *dvbdev = file->private_data;
2628         struct dvb_frontend *fe = dvbdev->priv;
2629         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2630         int ret;
2631
2632         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2633
2634         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2635                 fepriv->release_jiffies = jiffies;
2636                 mb();
2637         }
2638
2639         ret = dvb_generic_release (inode, file);
2640
2641         if (dvbdev->users == -1) {
2642                 wake_up(&fepriv->wait_queue);
2643 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2644                 if (fe->dvb->mdev) {
2645                         mutex_lock(&fe->dvb->mdev->graph_mutex);
2646                         if (fe->dvb->mdev->disable_source)
2647                                 fe->dvb->mdev->disable_source(dvbdev->entity);
2648                         mutex_unlock(&fe->dvb->mdev->graph_mutex);
2649                 }
2650 #endif
2651                 if (fe->exit != DVB_FE_NO_EXIT)
2652                         wake_up(&dvbdev->wait_queue);
2653                 if (fe->ops.ts_bus_ctrl)
2654                         fe->ops.ts_bus_ctrl(fe, 0);
2655         }
2656
2657         dvb_frontend_put(fe);
2658
2659         return ret;
2660 }
2661
2662 static const struct file_operations dvb_frontend_fops = {
2663         .owner          = THIS_MODULE,
2664         .unlocked_ioctl = dvb_generic_ioctl,
2665         .poll           = dvb_frontend_poll,
2666         .open           = dvb_frontend_open,
2667         .release        = dvb_frontend_release,
2668         .llseek         = noop_llseek,
2669 };
2670
2671 int dvb_frontend_suspend(struct dvb_frontend *fe)
2672 {
2673         int ret = 0;
2674
2675         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2676                         fe->id);
2677
2678         if (fe->ops.tuner_ops.suspend)
2679                 ret = fe->ops.tuner_ops.suspend(fe);
2680         else if (fe->ops.tuner_ops.sleep)
2681                 ret = fe->ops.tuner_ops.sleep(fe);
2682
2683         if (fe->ops.sleep)
2684                 ret = fe->ops.sleep(fe);
2685
2686         return ret;
2687 }
2688 EXPORT_SYMBOL(dvb_frontend_suspend);
2689
2690 int dvb_frontend_resume(struct dvb_frontend *fe)
2691 {
2692         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2693         int ret = 0;
2694
2695         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2696                         fe->id);
2697
2698         fe->exit = DVB_FE_DEVICE_RESUME;
2699         if (fe->ops.init)
2700                 ret = fe->ops.init(fe);
2701
2702         if (fe->ops.tuner_ops.resume)
2703                 ret = fe->ops.tuner_ops.resume(fe);
2704         else if (fe->ops.tuner_ops.init)
2705                 ret = fe->ops.tuner_ops.init(fe);
2706
2707         if (fe->ops.set_tone && fepriv->tone != -1)
2708                 fe->ops.set_tone(fe, fepriv->tone);
2709         if (fe->ops.set_voltage && fepriv->voltage != -1)
2710                 fe->ops.set_voltage(fe, fepriv->voltage);
2711
2712         fe->exit = DVB_FE_NO_EXIT;
2713         fepriv->state = FESTATE_RETUNE;
2714         dvb_frontend_wakeup(fe);
2715
2716         return ret;
2717 }
2718 EXPORT_SYMBOL(dvb_frontend_resume);
2719
2720 int dvb_register_frontend(struct dvb_adapter* dvb,
2721                           struct dvb_frontend* fe)
2722 {
2723         struct dvb_frontend_private *fepriv;
2724         const struct dvb_device dvbdev_template = {
2725                 .users = ~0,
2726                 .writers = 1,
2727                 .readers = (~0)-1,
2728                 .fops = &dvb_frontend_fops,
2729 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2730                 .name = fe->ops.info.name,
2731 #endif
2732                 .kernel_ioctl = dvb_frontend_ioctl
2733         };
2734
2735         dev_dbg(dvb->device, "%s:\n", __func__);
2736
2737         if (mutex_lock_interruptible(&frontend_mutex))
2738                 return -ERESTARTSYS;
2739
2740         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2741         if (fe->frontend_priv == NULL) {
2742                 mutex_unlock(&frontend_mutex);
2743                 return -ENOMEM;
2744         }
2745         fepriv = fe->frontend_priv;
2746
2747         kref_init(&fe->refcount);
2748
2749         /*
2750          * After initialization, there need to be two references: one
2751          * for dvb_unregister_frontend(), and another one for
2752          * dvb_frontend_detach().
2753          */
2754         dvb_frontend_get(fe);
2755
2756         sema_init(&fepriv->sem, 1);
2757         init_waitqueue_head (&fepriv->wait_queue);
2758         init_waitqueue_head (&fepriv->events.wait_queue);
2759         mutex_init(&fepriv->events.mtx);
2760         fe->dvb = dvb;
2761         fepriv->inversion = INVERSION_OFF;
2762
2763         dev_info(fe->dvb->device,
2764                         "DVB: registering adapter %i frontend %i (%s)...\n",
2765                         fe->dvb->num, fe->id, fe->ops.info.name);
2766
2767         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2768                              fe, DVB_DEVICE_FRONTEND, 0);
2769
2770         /*
2771          * Initialize the cache to the proper values according with the
2772          * first supported delivery system (ops->delsys[0])
2773          */
2774
2775         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2776         dvb_frontend_clear_cache(fe);
2777
2778         mutex_unlock(&frontend_mutex);
2779         return 0;
2780 }
2781 EXPORT_SYMBOL(dvb_register_frontend);
2782
2783 int dvb_unregister_frontend(struct dvb_frontend* fe)
2784 {
2785         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2786         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2787
2788         mutex_lock(&frontend_mutex);
2789         dvb_frontend_stop(fe);
2790         dvb_remove_device(fepriv->dvbdev);
2791
2792         /* fe is invalid now */
2793         mutex_unlock(&frontend_mutex);
2794         dvb_frontend_put(fe);
2795         return 0;
2796 }
2797 EXPORT_SYMBOL(dvb_unregister_frontend);
2798
2799 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
2800                                         void (*release)(struct dvb_frontend *fe))
2801 {
2802         if (release) {
2803                 release(fe);
2804 #ifdef CONFIG_MEDIA_ATTACH
2805                 dvb_detach(release);
2806 #endif
2807         }
2808 }
2809
2810 void dvb_frontend_detach(struct dvb_frontend* fe)
2811 {
2812         dvb_frontend_invoke_release(fe, fe->ops.release_sec);
2813         dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
2814         dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
2815         dvb_frontend_invoke_release(fe, fe->ops.detach);
2816         dvb_frontend_put(fe);
2817 }
2818 EXPORT_SYMBOL(dvb_frontend_detach);