kernel/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  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26  */
  27
  28 /* Enables DVBv3 compatibility bits at the headers */
  29 #define __DVB_CORE__
  30
  31 #include <linux/string.h>
  32 #include <linux/kernel.h>
  33 #include <linux/sched.h>
  34 #include <linux/wait.h>
  35 #include <linux/slab.h>
  36 #include <linux/poll.h>
  37 #include <linux/semaphore.h>
  38 #include <linux/module.h>
  39 #include <linux/list.h>
  40 #include <linux/freezer.h>
  41 #include <linux/jiffies.h>
  42 #include <linux/kthread.h>
  43 #include <linux/ktime.h>
  44 #include <asm/processor.h>
  45
  46 #include "dvb_frontend.h"
  47 #include "dvbdev.h"
  48 #include <linux/dvb/version.h>
  49
  50 static int dvb_frontend_debug;
  51 static int dvb_shutdown_timeout;
  52 static int dvb_force_auto_inversion;
  53 static int dvb_override_tune_delay;
  54 static int dvb_powerdown_on_sleep = 1;
  55 static int dvb_mfe_wait_time = 5;
  56
  57 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  58 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  59 module_param(dvb_shutdown_timeout, int, 0644);
  60 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  61 module_param(dvb_force_auto_inversion, int, 0644);
  62 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  63 module_param(dvb_override_tune_delay, int, 0644);
  64 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  65 module_param(dvb_powerdown_on_sleep, int, 0644);
  66 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  67 module_param(dvb_mfe_wait_time, int, 0644);
  68 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)");
  69
  70 #define FESTATE_IDLE 1
  71 #define FESTATE_RETUNE 2
  72 #define FESTATE_TUNING_FAST 4
  73 #define FESTATE_TUNING_SLOW 8
  74 #define FESTATE_TUNED 16
  75 #define FESTATE_ZIGZAG_FAST 32
  76 #define FESTATE_ZIGZAG_SLOW 64
  77 #define FESTATE_DISEQC 128
  78 #define FESTATE_ERROR 256
  79 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  80 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  81 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  82 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  83
  84 /*
  85  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  86  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  87  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  88  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  89  * FESTATE_TUNED. The frontend has successfully locked on.
  90  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  91  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  92  * FESTATE_DISEQC. A DISEQC command has just been issued.
  93  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  94  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  95  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  96  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  97  */
  98
  99 static DEFINE_MUTEX(frontend_mutex);
 100
 101 struct dvb_frontend_private {
 102
 103         /* thread/frontend values */
 104         struct dvb_device *dvbdev;
 105         struct dvb_frontend_parameters parameters_out;
 106         struct dvb_fe_events events;
 107         struct semaphore sem;
 108         struct list_head list_head;
 109         wait_queue_head_t wait_queue;
 110         struct task_struct *thread;
 111         unsigned long release_jiffies;
 112         unsigned int wakeup;
 113         enum fe_status status;
 114         unsigned long tune_mode_flags;
 115         unsigned int delay;
 116         unsigned int reinitialise;
 117         int tone;
 118         int voltage;
 119
 120         /* swzigzag values */
 121         unsigned int state;
 122         unsigned int bending;
 123         int lnb_drift;
 124         unsigned int inversion;
 125         unsigned int auto_step;
 126         unsigned int auto_sub_step;
 127         unsigned int started_auto_step;
 128         unsigned int min_delay;
 129         unsigned int max_drift;
 130         unsigned int step_size;
 131         int quality;
 132         unsigned int check_wrapped;
 133         enum dvbfe_search algo_status;
 134
 135 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
 136         struct media_pipeline pipe;
 137         struct media_entity *pipe_start_entity;
 138 #endif
 139 };
 140
 141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 142 static int dtv_get_frontend(struct dvb_frontend *fe,
 143                             struct dvb_frontend_parameters *p_out);
 144 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 145                                            struct dvb_frontend_parameters *p);
 146
 147 static bool has_get_frontend(struct dvb_frontend *fe)
 148 {
 149         return fe->ops.get_frontend != NULL;
 150 }
 151
 152 /*
 153  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 154  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 155  * otherwise, a DVBv3 call will fail.
 156  */
 157 enum dvbv3_emulation_type {
 158         DVBV3_UNKNOWN,
 159         DVBV3_QPSK,
 160         DVBV3_QAM,
 161         DVBV3_OFDM,
 162         DVBV3_ATSC,
 163 };
 164
 165 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 166 {
 167         switch (delivery_system) {
 168         case SYS_DVBC_ANNEX_A:
 169         case SYS_DVBC_ANNEX_C:
 170                 return DVBV3_QAM;
 171         case SYS_DVBS:
 172         case SYS_DVBS2:
 173         case SYS_TURBO:
 174         case SYS_ISDBS:
 175         case SYS_DSS:
 176                 return DVBV3_QPSK;
 177         case SYS_DVBT:
 178         case SYS_DVBT2:
 179         case SYS_ISDBT:
 180         case SYS_DTMB:
 181                 return DVBV3_OFDM;
 182         case SYS_ATSC:
 183         case SYS_ATSCMH:
 184         case SYS_DVBC_ANNEX_B:
 185                 return DVBV3_ATSC;
 186         case SYS_UNDEFINED:
 187         case SYS_ISDBC:
 188         case SYS_DVBH:
 189         case SYS_DAB:
 190         default:
 191                 /*
 192                  * Doesn't know how to emulate those types and/or
 193                  * there's no frontend driver from this type yet
 194                  * with some emulation code, so, we're not sure yet how
 195                  * to handle them, or they're not compatible with a DVBv3 call.
 196                  */
 197                 return DVBV3_UNKNOWN;
 198         }
 199 }
 200
 201 static void dvb_frontend_add_event(struct dvb_frontend *fe,
 202                                    enum fe_status status)
 203 {
 204         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 205         struct dvb_fe_events *events = &fepriv->events;
 206         struct dvb_frontend_event *e;
 207         int wp;
 208
 209         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 210
 211         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 212                 dtv_get_frontend(fe, &fepriv->parameters_out);
 213
 214         mutex_lock(&events->mtx);
 215
 216         wp = (events->eventw + 1) % MAX_EVENT;
 217         if (wp == events->eventr) {
 218                 events->overflow = 1;
 219                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 220         }
 221
 222         e = &events->events[events->eventw];
 223         e->status = status;
 224         e->parameters = fepriv->parameters_out;
 225
 226         events->eventw = wp;
 227
 228         mutex_unlock(&events->mtx);
 229
 230         wake_up_interruptible (&events->wait_queue);
 231 }
 232
 233 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 234                             struct dvb_frontend_event *event, int flags)
 235 {
 236         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 237         struct dvb_fe_events *events = &fepriv->events;
 238
 239         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 240
 241         if (events->overflow) {
 242                 events->overflow = 0;
 243                 return -EOVERFLOW;
 244         }
 245
 246         if (events->eventw == events->eventr) {
 247                 int ret;
 248
 249                 if (flags & O_NONBLOCK)
 250                         return -EWOULDBLOCK;
 251
 252                 up(&fepriv->sem);
 253
 254                 ret = wait_event_interruptible (events->wait_queue,
 255                                                 events->eventw != events->eventr);
 256
 257                 if (down_interruptible (&fepriv->sem))
 258                         return -ERESTARTSYS;
 259
 260                 if (ret < 0)
 261                         return ret;
 262         }
 263
 264         mutex_lock(&events->mtx);
 265         *event = events->events[events->eventr];
 266         events->eventr = (events->eventr + 1) % MAX_EVENT;
 267         mutex_unlock(&events->mtx);
 268
 269         return 0;
 270 }
 271
 272 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 273 {
 274         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 275         struct dvb_fe_events *events = &fepriv->events;
 276
 277         mutex_lock(&events->mtx);
 278         events->eventr = events->eventw;
 279         mutex_unlock(&events->mtx);
 280 }
 281
 282 static void dvb_frontend_init(struct dvb_frontend *fe)
 283 {
 284         dev_dbg(fe->dvb->device,
 285                         "%s: initialising adapter %i frontend %i (%s)...\n",
 286                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 287
 288         if (fe->ops.init)
 289                 fe->ops.init(fe);
 290         if (fe->ops.tuner_ops.init) {
 291                 if (fe->ops.i2c_gate_ctrl)
 292                         fe->ops.i2c_gate_ctrl(fe, 1);
 293                 fe->ops.tuner_ops.init(fe);
 294                 if (fe->ops.i2c_gate_ctrl)
 295                         fe->ops.i2c_gate_ctrl(fe, 0);
 296         }
 297 }
 298
 299 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 300 {
 301         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 302
 303         fepriv->reinitialise = 1;
 304         dvb_frontend_wakeup(fe);
 305 }
 306 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 307
 308 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 309 {
 310         int q2;
 311         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 312
 313         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 314
 315         if (locked)
 316                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 317         else
 318                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 319
 320         q2 = fepriv->quality - 128;
 321         q2 *= q2;
 322
 323         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 324 }
 325
 326 /**
 327  * Performs automatic twiddling of frontend parameters.
 328  *
 329  * @param fe The frontend concerned.
 330  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 331  * @returns Number of complete iterations that have been performed.
 332  */
 333 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 334 {
 335         int autoinversion;
 336         int ready = 0;
 337         int fe_set_err = 0;
 338         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 339         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 340         int original_inversion = c->inversion;
 341         u32 original_frequency = c->frequency;
 342
 343         /* are we using autoinversion? */
 344         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 345                          (c->inversion == INVERSION_AUTO));
 346
 347         /* setup parameters correctly */
 348         while(!ready) {
 349                 /* calculate the lnb_drift */
 350                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 351
 352                 /* wrap the auto_step if we've exceeded the maximum drift */
 353                 if (fepriv->lnb_drift > fepriv->max_drift) {
 354                         fepriv->auto_step = 0;
 355                         fepriv->auto_sub_step = 0;
 356                         fepriv->lnb_drift = 0;
 357                 }
 358
 359                 /* perform inversion and +/- zigzag */
 360                 switch(fepriv->auto_sub_step) {
 361                 case 0:
 362                         /* try with the current inversion and current drift setting */
 363                         ready = 1;
 364                         break;
 365
 366                 case 1:
 367                         if (!autoinversion) break;
 368
 369                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 370                         ready = 1;
 371                         break;
 372
 373                 case 2:
 374                         if (fepriv->lnb_drift == 0) break;
 375
 376                         fepriv->lnb_drift = -fepriv->lnb_drift;
 377                         ready = 1;
 378                         break;
 379
 380                 case 3:
 381                         if (fepriv->lnb_drift == 0) break;
 382                         if (!autoinversion) break;
 383
 384                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 385                         fepriv->lnb_drift = -fepriv->lnb_drift;
 386                         ready = 1;
 387                         break;
 388
 389                 default:
 390                         fepriv->auto_step++;
 391                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 392                         break;
 393                 }
 394
 395                 if (!ready) fepriv->auto_sub_step++;
 396         }
 397
 398         /* if this attempt would hit where we started, indicate a complete
 399          * iteration has occurred */
 400         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 401             (fepriv->auto_sub_step == 0) && check_wrapped) {
 402                 return 1;
 403         }
 404
 405         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 406                         "auto_sub_step:%i started_auto_step:%i\n",
 407                         __func__, fepriv->lnb_drift, fepriv->inversion,
 408                         fepriv->auto_step, fepriv->auto_sub_step,
 409                         fepriv->started_auto_step);
 410
 411         /* set the frontend itself */
 412         c->frequency += fepriv->lnb_drift;
 413         if (autoinversion)
 414                 c->inversion = fepriv->inversion;
 415         tmp = *c;
 416         if (fe->ops.set_frontend)
 417                 fe_set_err = fe->ops.set_frontend(fe);
 418         *c = tmp;
 419         if (fe_set_err < 0) {
 420                 fepriv->state = FESTATE_ERROR;
 421                 return fe_set_err;
 422         }
 423
 424         c->frequency = original_frequency;
 425         c->inversion = original_inversion;
 426
 427         fepriv->auto_sub_step++;
 428         return 0;
 429 }
 430
 431 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 432 {
 433         enum fe_status s = 0;
 434         int retval = 0;
 435         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 436         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 437
 438         /* if we've got no parameters, just keep idling */
 439         if (fepriv->state & FESTATE_IDLE) {
 440                 fepriv->delay = 3*HZ;
 441                 fepriv->quality = 0;
 442                 return;
 443         }
 444
 445         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 446         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 447                 if (fepriv->state & FESTATE_RETUNE) {
 448                         tmp = *c;
 449                         if (fe->ops.set_frontend)
 450                                 retval = fe->ops.set_frontend(fe);
 451                         *c = tmp;
 452                         if (retval < 0)
 453                                 fepriv->state = FESTATE_ERROR;
 454                         else
 455                                 fepriv->state = FESTATE_TUNED;
 456                 }
 457                 fepriv->delay = 3*HZ;
 458                 fepriv->quality = 0;
 459                 return;
 460         }
 461
 462         /* get the frontend status */
 463         if (fepriv->state & FESTATE_RETUNE) {
 464                 s = 0;
 465         } else {
 466                 if (fe->ops.read_status)
 467                         fe->ops.read_status(fe, &s);
 468                 if (s != fepriv->status) {
 469                         dvb_frontend_add_event(fe, s);
 470                         fepriv->status = s;
 471                 }
 472         }
 473
 474         /* if we're not tuned, and we have a lock, move to the TUNED state */
 475         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 476                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 477                 fepriv->state = FESTATE_TUNED;
 478
 479                 /* if we're tuned, then we have determined the correct inversion */
 480                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 481                     (c->inversion == INVERSION_AUTO)) {
 482                         c->inversion = fepriv->inversion;
 483                 }
 484                 return;
 485         }
 486
 487         /* if we are tuned already, check we're still locked */
 488         if (fepriv->state & FESTATE_TUNED) {
 489                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 490
 491                 /* we're tuned, and the lock is still good... */
 492                 if (s & FE_HAS_LOCK) {
 493                         return;
 494                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 495                         fepriv->state = FESTATE_ZIGZAG_FAST;
 496                         fepriv->started_auto_step = fepriv->auto_step;
 497                         fepriv->check_wrapped = 0;
 498                 }
 499         }
 500
 501         /* don't actually do anything if we're in the LOSTLOCK state,
 502          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 503         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 504             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 505                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 506                 return;
 507         }
 508
 509         /* don't do anything if we're in the DISEQC state, since this
 510          * might be someone with a motorized dish controlled by DISEQC.
 511          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 512         if (fepriv->state & FESTATE_DISEQC) {
 513                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 514                 return;
 515         }
 516
 517         /* if we're in the RETUNE state, set everything up for a brand
 518          * new scan, keeping the current inversion setting, as the next
 519          * tune is _very_ likely to require the same */
 520         if (fepriv->state & FESTATE_RETUNE) {
 521                 fepriv->lnb_drift = 0;
 522                 fepriv->auto_step = 0;
 523                 fepriv->auto_sub_step = 0;
 524                 fepriv->started_auto_step = 0;
 525                 fepriv->check_wrapped = 0;
 526         }
 527
 528         /* fast zigzag. */
 529         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 530                 fepriv->delay = fepriv->min_delay;
 531
 532                 /* perform a tune */
 533                 retval = dvb_frontend_swzigzag_autotune(fe,
 534                                                         fepriv->check_wrapped);
 535                 if (retval < 0) {
 536                         return;
 537                 } else if (retval) {
 538                         /* OK, if we've run out of trials at the fast speed.
 539                          * Drop back to slow for the _next_ attempt */
 540                         fepriv->state = FESTATE_SEARCHING_SLOW;
 541                         fepriv->started_auto_step = fepriv->auto_step;
 542                         return;
 543                 }
 544                 fepriv->check_wrapped = 1;
 545
 546                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 547                  * This ensures we cannot return from an
 548                  * FE_SET_FRONTEND ioctl before the first frontend tune
 549                  * occurs */
 550                 if (fepriv->state & FESTATE_RETUNE) {
 551                         fepriv->state = FESTATE_TUNING_FAST;
 552                 }
 553         }
 554
 555         /* slow zigzag */
 556         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 557                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 558
 559                 /* Note: don't bother checking for wrapping; we stay in this
 560                  * state until we get a lock */
 561                 dvb_frontend_swzigzag_autotune(fe, 0);
 562         }
 563 }
 564
 565 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 566 {
 567         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 568
 569         if (fe->exit != DVB_FE_NO_EXIT)
 570                 return 1;
 571
 572         if (fepriv->dvbdev->writers == 1)
 573                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 574                                   dvb_shutdown_timeout * HZ))
 575                         return 1;
 576
 577         return 0;
 578 }
 579
 580 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 581 {
 582         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 583
 584         if (fepriv->wakeup) {
 585                 fepriv->wakeup = 0;
 586                 return 1;
 587         }
 588         return dvb_frontend_is_exiting(fe);
 589 }
 590
 591 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 592 {
 593         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 594
 595         fepriv->wakeup = 1;
 596         wake_up_interruptible(&fepriv->wait_queue);
 597 }
 598
 599 /**
 600  * dvb_enable_media_tuner() - tries to enable the DVB tuner
 601  *
 602  * @fe:         struct dvb_frontend pointer
 603  *
 604  * This function ensures that just one media tuner is enabled for a given
 605  * frontend. It has two different behaviors:
 606  * - For trivial devices with just one tuner:
 607  *   it just enables the existing tuner->fe link
 608  * - For devices with more than one tuner:
 609  *   It is up to the driver to implement the logic that will enable one tuner
 610  *   and disable the other ones. However, if more than one tuner is enabled for
 611  *   the same frontend, it will print an error message and return -EINVAL.
 612  *
 613  * At return, it will return the error code returned by media_entity_setup_link,
 614  * or 0 if everything is OK, if no tuner is linked to the frontend or if the
 615  * mdev is NULL.
 616  */
 617 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 618 static int dvb_enable_media_tuner(struct dvb_frontend *fe)
 619 {
 620         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 621         struct dvb_adapter *adapter = fe->dvb;
 622         struct media_device *mdev = adapter->mdev;
 623         struct media_entity  *entity, *source;
 624         struct media_link *link, *found_link = NULL;
 625         int i, ret, n_links = 0, active_links = 0;
 626
 627         fepriv->pipe_start_entity = NULL;
 628
 629         if (!mdev)
 630                 return 0;
 631
 632         entity = fepriv->dvbdev->entity;
 633         fepriv->pipe_start_entity = entity;
 634
 635         for (i = 0; i < entity->num_links; i++) {
 636                 link = &entity->links[i];
 637                 if (link->sink->entity == entity) {
 638                         found_link = link;
 639                         n_links++;
 640                         if (link->flags & MEDIA_LNK_FL_ENABLED)
 641                                 active_links++;
 642                 }
 643         }
 644
 645         if (!n_links || active_links == 1 || !found_link)
 646                 return 0;
 647
 648         /*
 649          * If a frontend has more than one tuner linked, it is up to the driver
 650          * to select with one will be the active one, as the frontend core can't
 651          * guess. If the driver doesn't do that, it is a bug.
 652          */
 653         if (n_links > 1 && active_links != 1) {
 654                 dev_err(fe->dvb->device,
 655                         "WARNING: there are %d active links among %d tuners. This is a driver's bug!\n",
 656                         active_links, n_links);
 657                 return -EINVAL;
 658         }
 659
 660         source = found_link->source->entity;
 661         fepriv->pipe_start_entity = source;
 662         for (i = 0; i < source->num_links; i++) {
 663                 struct media_entity *sink;
 664                 int flags = 0;
 665
 666                 link = &source->links[i];
 667                 sink = link->sink->entity;
 668
 669                 if (sink == entity)
 670                         flags = MEDIA_LNK_FL_ENABLED;
 671
 672                 ret = media_entity_setup_link(link, flags);
 673                 if (ret) {
 674                         dev_err(fe->dvb->device,
 675                                 "Couldn't change link %s->%s to %s. Error %d\n",
 676                                 source->name, sink->name,
 677                                 flags ? "enabled" : "disabled",
 678                                 ret);
 679                         return ret;
 680                 } else
 681                         dev_dbg(fe->dvb->device,
 682                                 "link %s->%s was %s\n",
 683                                 source->name, sink->name,
 684                                 flags ? "ENABLED" : "disabled");
 685         }
 686         return 0;
 687 }
 688 #endif
 689
 690 static int dvb_frontend_thread(void *data)
 691 {
 692         struct dvb_frontend *fe = data;
 693         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 694         enum fe_status s;
 695         enum dvbfe_algo algo;
 696 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 697         int ret;
 698 #endif
 699
 700         bool re_tune = false;
 701         bool semheld = false;
 702
 703         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 704
 705         fepriv->check_wrapped = 0;
 706         fepriv->quality = 0;
 707         fepriv->delay = 3*HZ;
 708         fepriv->status = 0;
 709         fepriv->wakeup = 0;
 710         fepriv->reinitialise = 0;
 711
 712 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 713         ret = dvb_enable_media_tuner(fe);
 714         if (ret) {
 715                 /* FIXME: return an error if it fails */
 716                 dev_info(fe->dvb->device,
 717                         "proceeding with FE task\n");
 718         } else if (fepriv->pipe_start_entity) {
 719                 ret = media_entity_pipeline_start(fepriv->pipe_start_entity,
 720                                                   &fepriv->pipe);
 721                 if (ret)
 722                         return ret;
 723         }
 724 #endif
 725
 726         dvb_frontend_init(fe);
 727
 728         set_freezable();
 729         while (1) {
 730                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 731 restart:
 732                 wait_event_interruptible_timeout(fepriv->wait_queue,
 733                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 734                                 || freezing(current),
 735                         fepriv->delay);
 736
 737                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 738                         /* got signal or quitting */
 739                         if (!down_interruptible(&fepriv->sem))
 740                                 semheld = true;
 741                         fe->exit = DVB_FE_NORMAL_EXIT;
 742                         break;
 743                 }
 744
 745                 if (try_to_freeze())
 746                         goto restart;
 747
 748                 if (down_interruptible(&fepriv->sem))
 749                         break;
 750
 751                 if (fepriv->reinitialise) {
 752                         dvb_frontend_init(fe);
 753                         if (fe->ops.set_tone && fepriv->tone != -1)
 754                                 fe->ops.set_tone(fe, fepriv->tone);
 755                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 756                                 fe->ops.set_voltage(fe, fepriv->voltage);
 757                         fepriv->reinitialise = 0;
 758                 }
 759
 760                 /* do an iteration of the tuning loop */
 761                 if (fe->ops.get_frontend_algo) {
 762                         algo = fe->ops.get_frontend_algo(fe);
 763                         switch (algo) {
 764                         case DVBFE_ALGO_HW:
 765                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 766
 767                                 if (fepriv->state & FESTATE_RETUNE) {
 768                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 769                                         re_tune = true;
 770                                         fepriv->state = FESTATE_TUNED;
 771                                 } else {
 772                                         re_tune = false;
 773                                 }
 774
 775                                 if (fe->ops.tune)
 776                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 777
 778                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 779                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 780                                         dvb_frontend_add_event(fe, s);
 781                                         fepriv->status = s;
 782                                 }
 783                                 break;
 784                         case DVBFE_ALGO_SW:
 785                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 786                                 dvb_frontend_swzigzag(fe);
 787                                 break;
 788                         case DVBFE_ALGO_CUSTOM:
 789                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 790                                 if (fepriv->state & FESTATE_RETUNE) {
 791                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 792                                         fepriv->state = FESTATE_TUNED;
 793                                 }
 794                                 /* Case where we are going to search for a carrier
 795                                  * User asked us to retune again for some reason, possibly
 796                                  * requesting a search with a new set of parameters
 797                                  */
 798                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 799                                         if (fe->ops.search) {
 800                                                 fepriv->algo_status = fe->ops.search(fe);
 801                                                 /* We did do a search as was requested, the flags are
 802                                                  * now unset as well and has the flags wrt to search.
 803                                                  */
 804                                         } else {
 805                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 806                                         }
 807                                 }
 808                                 /* Track the carrier if the search was successful */
 809                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 810                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 811                                         fepriv->delay = HZ / 2;
 812                                 }
 813                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
 814                                 fe->ops.read_status(fe, &s);
 815                                 if (s != fepriv->status) {
 816                                         dvb_frontend_add_event(fe, s); /* update event list */
 817                                         fepriv->status = s;
 818                                         if (!(s & FE_HAS_LOCK)) {
 819                                                 fepriv->delay = HZ / 10;
 820                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 821                                         } else {
 822                                                 fepriv->delay = 60 * HZ;
 823                                         }
 824                                 }
 825                                 break;
 826                         default:
 827                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 828                                 break;
 829                         }
 830                 } else {
 831                         dvb_frontend_swzigzag(fe);
 832                 }
 833         }
 834
 835 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 836         if (fepriv->pipe_start_entity)
 837                 media_entity_pipeline_stop(fepriv->pipe_start_entity);
 838         fepriv->pipe_start_entity = NULL;
 839 #endif
 840
 841         if (dvb_powerdown_on_sleep) {
 842                 if (fe->ops.set_voltage)
 843                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 844                 if (fe->ops.tuner_ops.sleep) {
 845                         if (fe->ops.i2c_gate_ctrl)
 846                                 fe->ops.i2c_gate_ctrl(fe, 1);
 847                         fe->ops.tuner_ops.sleep(fe);
 848                         if (fe->ops.i2c_gate_ctrl)
 849                                 fe->ops.i2c_gate_ctrl(fe, 0);
 850                 }
 851                 if (fe->ops.sleep)
 852                         fe->ops.sleep(fe);
 853         }
 854
 855         fepriv->thread = NULL;
 856         if (kthread_should_stop())
 857                 fe->exit = DVB_FE_DEVICE_REMOVED;
 858         else
 859                 fe->exit = DVB_FE_NO_EXIT;
 860         mb();
 861
 862         if (semheld)
 863                 up(&fepriv->sem);
 864         dvb_frontend_wakeup(fe);
 865         return 0;
 866 }
 867
 868 static void dvb_frontend_stop(struct dvb_frontend *fe)
 869 {
 870         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 871
 872         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 873
 874         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 875                 fe->exit = DVB_FE_NORMAL_EXIT;
 876         mb();
 877
 878         if (!fepriv->thread)
 879                 return;
 880
 881         kthread_stop(fepriv->thread);
 882
 883         sema_init(&fepriv->sem, 1);
 884         fepriv->state = FESTATE_IDLE;
 885
 886         /* paranoia check in case a signal arrived */
 887         if (fepriv->thread)
 888                 dev_warn(fe->dvb->device,
 889                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 890                                 fepriv->thread);
 891 }
 892
 893 /*
 894  * Sleep until gettimeofday() > waketime + add_usec
 895  * This needs to be as precise as possible, but as the delay is
 896  * usually between 2ms and 32ms, it is done using a scheduled msleep
 897  * followed by usleep (normally a busy-wait loop) for the remainder
 898  */
 899 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
 900 {
 901         s32 delta, newdelta;
 902
 903         ktime_add_us(*waketime, add_usec);
 904         delta = ktime_us_delta(ktime_get_real(), *waketime);
 905         if (delta > 2500) {
 906                 msleep((delta - 1500) / 1000);
 907                 newdelta = ktime_us_delta(ktime_get_real(), *waketime);
 908                 delta = (newdelta > delta) ? 0 : newdelta;
 909         }
 910         if (delta > 0)
 911                 udelay(delta);
 912 }
 913 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 914
 915 static int dvb_frontend_start(struct dvb_frontend *fe)
 916 {
 917         int ret;
 918         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 919         struct task_struct *fe_thread;
 920
 921         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 922
 923         if (fepriv->thread) {
 924                 if (fe->exit == DVB_FE_NO_EXIT)
 925                         return 0;
 926                 else
 927                         dvb_frontend_stop (fe);
 928         }
 929
 930         if (signal_pending(current))
 931                 return -EINTR;
 932         if (down_interruptible (&fepriv->sem))
 933                 return -EINTR;
 934
 935         fepriv->state = FESTATE_IDLE;
 936         fe->exit = DVB_FE_NO_EXIT;
 937         fepriv->thread = NULL;
 938         mb();
 939
 940         fe_thread = kthread_run(dvb_frontend_thread, fe,
 941                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 942         if (IS_ERR(fe_thread)) {
 943                 ret = PTR_ERR(fe_thread);
 944                 dev_warn(fe->dvb->device,
 945                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 946                                 ret);
 947                 up(&fepriv->sem);
 948                 return ret;
 949         }
 950         fepriv->thread = fe_thread;
 951         return 0;
 952 }
 953
 954 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 955                                         u32 *freq_min, u32 *freq_max)
 956 {
 957         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 958
 959         if (fe->ops.info.frequency_max == 0)
 960                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 961         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 962                 *freq_max = fe->ops.info.frequency_max;
 963         else
 964                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 965
 966         if (*freq_min == 0 || *freq_max == 0)
 967                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 968                                 fe->dvb->num, fe->id);
 969 }
 970
 971 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 972 {
 973         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 974         u32 freq_min;
 975         u32 freq_max;
 976
 977         /* range check: frequency */
 978         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 979         if ((freq_min && c->frequency < freq_min) ||
 980             (freq_max && c->frequency > freq_max)) {
 981                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 982                                 fe->dvb->num, fe->id, c->frequency,
 983                                 freq_min, freq_max);
 984                 return -EINVAL;
 985         }
 986
 987         /* range check: symbol rate */
 988         switch (c->delivery_system) {
 989         case SYS_DVBS:
 990         case SYS_DVBS2:
 991         case SYS_TURBO:
 992         case SYS_DVBC_ANNEX_A:
 993         case SYS_DVBC_ANNEX_C:
 994                 if ((fe->ops.info.symbol_rate_min &&
 995                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 996                     (fe->ops.info.symbol_rate_max &&
 997                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 998                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 999                                         fe->dvb->num, fe->id, c->symbol_rate,
1000                                         fe->ops.info.symbol_rate_min,
1001                                         fe->ops.info.symbol_rate_max);
1002                         return -EINVAL;
1003                 }
1004         default:
1005                 break;
1006         }
1007
1008         return 0;
1009 }
1010
1011 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
1012 {
1013         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1014         int i;
1015         u32 delsys;
1016
1017         delsys = c->delivery_system;
1018         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
1019         c->delivery_system = delsys;
1020
1021         c->state = DTV_CLEAR;
1022
1023         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1024                         __func__, c->delivery_system);
1025
1026         c->transmission_mode = TRANSMISSION_MODE_AUTO;
1027         c->bandwidth_hz = 0;    /* AUTO */
1028         c->guard_interval = GUARD_INTERVAL_AUTO;
1029         c->hierarchy = HIERARCHY_AUTO;
1030         c->symbol_rate = 0;
1031         c->code_rate_HP = FEC_AUTO;
1032         c->code_rate_LP = FEC_AUTO;
1033         c->fec_inner = FEC_AUTO;
1034         c->rolloff = ROLLOFF_AUTO;
1035         c->voltage = SEC_VOLTAGE_OFF;
1036         c->sectone = SEC_TONE_OFF;
1037         c->pilot = PILOT_AUTO;
1038
1039         c->isdbt_partial_reception = 0;
1040         c->isdbt_sb_mode = 0;
1041         c->isdbt_sb_subchannel = 0;
1042         c->isdbt_sb_segment_idx = 0;
1043         c->isdbt_sb_segment_count = 0;
1044         c->isdbt_layer_enabled = 0;
1045         for (i = 0; i < 3; i++) {
1046                 c->layer[i].fec = FEC_AUTO;
1047                 c->layer[i].modulation = QAM_AUTO;
1048                 c->layer[i].interleaving = 0;
1049                 c->layer[i].segment_count = 0;
1050         }
1051
1052         c->stream_id = NO_STREAM_ID_FILTER;
1053
1054         switch (c->delivery_system) {
1055         case SYS_DVBS:
1056         case SYS_DVBS2:
1057         case SYS_TURBO:
1058                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1059                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1060                 break;
1061         case SYS_ATSC:
1062                 c->modulation = VSB_8;
1063                 break;
1064         case SYS_ISDBS:
1065                 c->symbol_rate = 28860000;
1066                 c->rolloff = ROLLOFF_35;
1067                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1068                 break;
1069         default:
1070                 c->modulation = QAM_AUTO;
1071                 break;
1072         }
1073
1074         c->lna = LNA_AUTO;
1075
1076         return 0;
1077 }
1078
1079 #define _DTV_CMD(n, s, b) \
1080 [n] = { \
1081         .name = #n, \
1082         .cmd  = n, \
1083         .set  = s,\
1084         .buffer = b \
1085 }
1086
1087 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1088         _DTV_CMD(DTV_TUNE, 1, 0),
1089         _DTV_CMD(DTV_CLEAR, 1, 0),
1090
1091         /* Set */
1092         _DTV_CMD(DTV_FREQUENCY, 1, 0),
1093         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1094         _DTV_CMD(DTV_MODULATION, 1, 0),
1095         _DTV_CMD(DTV_INVERSION, 1, 0),
1096         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1097         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1098         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1099         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1100         _DTV_CMD(DTV_TONE, 1, 0),
1101         _DTV_CMD(DTV_PILOT, 1, 0),
1102         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1103         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1104         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1105         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1106         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1107         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1108         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1109         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1110
1111         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1112         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1113         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1114         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1115         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1116         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1117         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1118         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1119         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1120         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1121         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1122         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1123         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1124         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1125         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1126         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1127         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1128         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1129
1130         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1131         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1132         _DTV_CMD(DTV_LNA, 1, 0),
1133
1134         /* Get */
1135         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1136         _DTV_CMD(DTV_API_VERSION, 0, 0),
1137
1138         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1139
1140         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1141         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1142
1143         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1144         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1145         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1146         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1147         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1148         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1149         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1150         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1151         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1152         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1153         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1154         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1155         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1156
1157         /* Statistics API */
1158         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1159         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1160         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1161         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1162         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1163         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1164         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1165         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1166 };
1167
1168 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1169 {
1170         int i;
1171
1172         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1173                 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1174                                 __func__, tvp->cmd);
1175                 return;
1176         }
1177
1178         dev_dbg(fe->dvb->device, "%s: tvp.cmd    = 0x%08x (%s)\n", __func__,
1179                         tvp->cmd, dtv_cmds[tvp->cmd].name);
1180
1181         if (dtv_cmds[tvp->cmd].buffer) {
1182                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1183                         __func__, tvp->u.buffer.len);
1184
1185                 for(i = 0; i < tvp->u.buffer.len; i++)
1186                         dev_dbg(fe->dvb->device,
1187                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1188                                         __func__, i, tvp->u.buffer.data[i]);
1189         } else {
1190                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1191                                 tvp->u.data);
1192         }
1193 }
1194
1195 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1196  * drivers can use a single set_frontend tuning function, regardless of whether
1197  * it's being used for the legacy or new API, reducing code and complexity.
1198  */
1199 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1200                                    struct dtv_frontend_properties *c,
1201                                    const struct dvb_frontend_parameters *p)
1202 {
1203         c->frequency = p->frequency;
1204         c->inversion = p->inversion;
1205
1206         switch (dvbv3_type(c->delivery_system)) {
1207         case DVBV3_QPSK:
1208                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1209                 c->symbol_rate = p->u.qpsk.symbol_rate;
1210                 c->fec_inner = p->u.qpsk.fec_inner;
1211                 break;
1212         case DVBV3_QAM:
1213                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1214                 c->symbol_rate = p->u.qam.symbol_rate;
1215                 c->fec_inner = p->u.qam.fec_inner;
1216                 c->modulation = p->u.qam.modulation;
1217                 break;
1218         case DVBV3_OFDM:
1219                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1220
1221                 switch (p->u.ofdm.bandwidth) {
1222                 case BANDWIDTH_10_MHZ:
1223                         c->bandwidth_hz = 10000000;
1224                         break;
1225                 case BANDWIDTH_8_MHZ:
1226                         c->bandwidth_hz = 8000000;
1227                         break;
1228                 case BANDWIDTH_7_MHZ:
1229                         c->bandwidth_hz = 7000000;
1230                         break;
1231                 case BANDWIDTH_6_MHZ:
1232                         c->bandwidth_hz = 6000000;
1233                         break;
1234                 case BANDWIDTH_5_MHZ:
1235                         c->bandwidth_hz = 5000000;
1236                         break;
1237                 case BANDWIDTH_1_712_MHZ:
1238                         c->bandwidth_hz = 1712000;
1239                         break;
1240                 case BANDWIDTH_AUTO:
1241                         c->bandwidth_hz = 0;
1242                 }
1243
1244                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1245                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1246                 c->modulation = p->u.ofdm.constellation;
1247                 c->transmission_mode = p->u.ofdm.transmission_mode;
1248                 c->guard_interval = p->u.ofdm.guard_interval;
1249                 c->hierarchy = p->u.ofdm.hierarchy_information;
1250                 break;
1251         case DVBV3_ATSC:
1252                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1253                 c->modulation = p->u.vsb.modulation;
1254                 if (c->delivery_system == SYS_ATSCMH)
1255                         break;
1256                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1257                         c->delivery_system = SYS_ATSC;
1258                 else
1259                         c->delivery_system = SYS_DVBC_ANNEX_B;
1260                 break;
1261         case DVBV3_UNKNOWN:
1262                 dev_err(fe->dvb->device,
1263                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1264                                 __func__, c->delivery_system);
1265                 return -EINVAL;
1266         }
1267
1268         return 0;
1269 }
1270
1271 /* Ensure the cached values are set correctly in the frontend
1272  * legacy tuning structures, for the advanced tuning API.
1273  */
1274 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1275                                             struct dvb_frontend_parameters *p)
1276 {
1277         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1278
1279         p->frequency = c->frequency;
1280         p->inversion = c->inversion;
1281
1282         switch (dvbv3_type(c->delivery_system)) {
1283         case DVBV3_UNKNOWN:
1284                 dev_err(fe->dvb->device,
1285                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1286                                 __func__, c->delivery_system);
1287                 return -EINVAL;
1288         case DVBV3_QPSK:
1289                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1290                 p->u.qpsk.symbol_rate = c->symbol_rate;
1291                 p->u.qpsk.fec_inner = c->fec_inner;
1292                 break;
1293         case DVBV3_QAM:
1294                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1295                 p->u.qam.symbol_rate = c->symbol_rate;
1296                 p->u.qam.fec_inner = c->fec_inner;
1297                 p->u.qam.modulation = c->modulation;
1298                 break;
1299         case DVBV3_OFDM:
1300                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1301                 switch (c->bandwidth_hz) {
1302                 case 10000000:
1303                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1304                         break;
1305                 case 8000000:
1306                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1307                         break;
1308                 case 7000000:
1309                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1310                         break;
1311                 case 6000000:
1312                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1313                         break;
1314                 case 5000000:
1315                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1316                         break;
1317                 case 1712000:
1318                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1319                         break;
1320                 case 0:
1321                 default:
1322                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1323                 }
1324                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1325                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1326                 p->u.ofdm.constellation = c->modulation;
1327                 p->u.ofdm.transmission_mode = c->transmission_mode;
1328                 p->u.ofdm.guard_interval = c->guard_interval;
1329                 p->u.ofdm.hierarchy_information = c->hierarchy;
1330                 break;
1331         case DVBV3_ATSC:
1332                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1333                 p->u.vsb.modulation = c->modulation;
1334                 break;
1335         }
1336         return 0;
1337 }
1338
1339 /**
1340  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1341  * @fe:         struct dvb_frontend pointer
1342  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1343  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1344  *
1345  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1346  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1347  * If p_out is not null, it will update the DVBv3 params pointed by it.
1348  */
1349 static int dtv_get_frontend(struct dvb_frontend *fe,
1350                             struct dvb_frontend_parameters *p_out)
1351 {
1352         int r;
1353
1354         if (fe->ops.get_frontend) {
1355                 r = fe->ops.get_frontend(fe);
1356                 if (unlikely(r < 0))
1357                         return r;
1358                 if (p_out)
1359                         dtv_property_legacy_params_sync(fe, p_out);
1360                 return 0;
1361         }
1362
1363         /* As everything is in cache, get_frontend fops are always supported */
1364         return 0;
1365 }
1366
1367 static int dvb_frontend_ioctl_legacy(struct file *file,
1368                         unsigned int cmd, void *parg);
1369 static int dvb_frontend_ioctl_properties(struct file *file,
1370                         unsigned int cmd, void *parg);
1371
1372 static int dtv_property_process_get(struct dvb_frontend *fe,
1373                                     const struct dtv_frontend_properties *c,
1374                                     struct dtv_property *tvp,
1375                                     struct file *file)
1376 {
1377         int r, ncaps;
1378
1379         switch(tvp->cmd) {
1380         case DTV_ENUM_DELSYS:
1381                 ncaps = 0;
1382                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1383                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1384                         ncaps++;
1385                 }
1386                 tvp->u.buffer.len = ncaps;
1387                 break;
1388         case DTV_FREQUENCY:
1389                 tvp->u.data = c->frequency;
1390                 break;
1391         case DTV_MODULATION:
1392                 tvp->u.data = c->modulation;
1393                 break;
1394         case DTV_BANDWIDTH_HZ:
1395                 tvp->u.data = c->bandwidth_hz;
1396                 break;
1397         case DTV_INVERSION:
1398                 tvp->u.data = c->inversion;
1399                 break;
1400         case DTV_SYMBOL_RATE:
1401                 tvp->u.data = c->symbol_rate;
1402                 break;
1403         case DTV_INNER_FEC:
1404                 tvp->u.data = c->fec_inner;
1405                 break;
1406         case DTV_PILOT:
1407                 tvp->u.data = c->pilot;
1408                 break;
1409         case DTV_ROLLOFF:
1410                 tvp->u.data = c->rolloff;
1411                 break;
1412         case DTV_DELIVERY_SYSTEM:
1413                 tvp->u.data = c->delivery_system;
1414                 break;
1415         case DTV_VOLTAGE:
1416                 tvp->u.data = c->voltage;
1417                 break;
1418         case DTV_TONE:
1419                 tvp->u.data = c->sectone;
1420                 break;
1421         case DTV_API_VERSION:
1422                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1423                 break;
1424         case DTV_CODE_RATE_HP:
1425                 tvp->u.data = c->code_rate_HP;
1426                 break;
1427         case DTV_CODE_RATE_LP:
1428                 tvp->u.data = c->code_rate_LP;
1429                 break;
1430         case DTV_GUARD_INTERVAL:
1431                 tvp->u.data = c->guard_interval;
1432                 break;
1433         case DTV_TRANSMISSION_MODE:
1434                 tvp->u.data = c->transmission_mode;
1435                 break;
1436         case DTV_HIERARCHY:
1437                 tvp->u.data = c->hierarchy;
1438                 break;
1439         case DTV_INTERLEAVING:
1440                 tvp->u.data = c->interleaving;
1441                 break;
1442
1443         /* ISDB-T Support here */
1444         case DTV_ISDBT_PARTIAL_RECEPTION:
1445                 tvp->u.data = c->isdbt_partial_reception;
1446                 break;
1447         case DTV_ISDBT_SOUND_BROADCASTING:
1448                 tvp->u.data = c->isdbt_sb_mode;
1449                 break;
1450         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1451                 tvp->u.data = c->isdbt_sb_subchannel;
1452                 break;
1453         case DTV_ISDBT_SB_SEGMENT_IDX:
1454                 tvp->u.data = c->isdbt_sb_segment_idx;
1455                 break;
1456         case DTV_ISDBT_SB_SEGMENT_COUNT:
1457                 tvp->u.data = c->isdbt_sb_segment_count;
1458                 break;
1459         case DTV_ISDBT_LAYER_ENABLED:
1460                 tvp->u.data = c->isdbt_layer_enabled;
1461                 break;
1462         case DTV_ISDBT_LAYERA_FEC:
1463                 tvp->u.data = c->layer[0].fec;
1464                 break;
1465         case DTV_ISDBT_LAYERA_MODULATION:
1466                 tvp->u.data = c->layer[0].modulation;
1467                 break;
1468         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1469                 tvp->u.data = c->layer[0].segment_count;
1470                 break;
1471         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1472                 tvp->u.data = c->layer[0].interleaving;
1473                 break;
1474         case DTV_ISDBT_LAYERB_FEC:
1475                 tvp->u.data = c->layer[1].fec;
1476                 break;
1477         case DTV_ISDBT_LAYERB_MODULATION:
1478                 tvp->u.data = c->layer[1].modulation;
1479                 break;
1480         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1481                 tvp->u.data = c->layer[1].segment_count;
1482                 break;
1483         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1484                 tvp->u.data = c->layer[1].interleaving;
1485                 break;
1486         case DTV_ISDBT_LAYERC_FEC:
1487                 tvp->u.data = c->layer[2].fec;
1488                 break;
1489         case DTV_ISDBT_LAYERC_MODULATION:
1490                 tvp->u.data = c->layer[2].modulation;
1491                 break;
1492         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1493                 tvp->u.data = c->layer[2].segment_count;
1494                 break;
1495         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1496                 tvp->u.data = c->layer[2].interleaving;
1497                 break;
1498
1499         /* Multistream support */
1500         case DTV_STREAM_ID:
1501         case DTV_DVBT2_PLP_ID_LEGACY:
1502                 tvp->u.data = c->stream_id;
1503                 break;
1504
1505         /* ATSC-MH */
1506         case DTV_ATSCMH_FIC_VER:
1507                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1508                 break;
1509         case DTV_ATSCMH_PARADE_ID:
1510                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1511                 break;
1512         case DTV_ATSCMH_NOG:
1513                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1514                 break;
1515         case DTV_ATSCMH_TNOG:
1516                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1517                 break;
1518         case DTV_ATSCMH_SGN:
1519                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1520                 break;
1521         case DTV_ATSCMH_PRC:
1522                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1523                 break;
1524         case DTV_ATSCMH_RS_FRAME_MODE:
1525                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1526                 break;
1527         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1528                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1529                 break;
1530         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1531                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1532                 break;
1533         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1534                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1535                 break;
1536         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1537                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1538                 break;
1539         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1540                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1541                 break;
1542         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1543                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1544                 break;
1545         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1546                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1547                 break;
1548         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1549                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1550                 break;
1551
1552         case DTV_LNA:
1553                 tvp->u.data = c->lna;
1554                 break;
1555
1556         /* Fill quality measures */
1557         case DTV_STAT_SIGNAL_STRENGTH:
1558                 tvp->u.st = c->strength;
1559                 break;
1560         case DTV_STAT_CNR:
1561                 tvp->u.st = c->cnr;
1562                 break;
1563         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1564                 tvp->u.st = c->pre_bit_error;
1565                 break;
1566         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1567                 tvp->u.st = c->pre_bit_count;
1568                 break;
1569         case DTV_STAT_POST_ERROR_BIT_COUNT:
1570                 tvp->u.st = c->post_bit_error;
1571                 break;
1572         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1573                 tvp->u.st = c->post_bit_count;
1574                 break;
1575         case DTV_STAT_ERROR_BLOCK_COUNT:
1576                 tvp->u.st = c->block_error;
1577                 break;
1578         case DTV_STAT_TOTAL_BLOCK_COUNT:
1579                 tvp->u.st = c->block_count;
1580                 break;
1581         default:
1582                 dev_dbg(fe->dvb->device,
1583                         "%s: FE property %d doesn't exist\n",
1584                         __func__, tvp->cmd);
1585                 return -EINVAL;
1586         }
1587
1588         /* Allow the frontend to override outgoing properties */
1589         if (fe->ops.get_property) {
1590                 r = fe->ops.get_property(fe, tvp);
1591                 if (r < 0)
1592                         return r;
1593         }
1594
1595         dtv_property_dump(fe, tvp);
1596
1597         return 0;
1598 }
1599
1600 static int dtv_set_frontend(struct dvb_frontend *fe);
1601
1602 static bool is_dvbv3_delsys(u32 delsys)
1603 {
1604         bool status;
1605
1606         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1607                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1608
1609         return status;
1610 }
1611
1612 /**
1613  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1614  * @fe:                 struct frontend;
1615  * @delsys:                     DVBv5 type that will be used for emulation
1616  *
1617  * Provides emulation for delivery systems that are compatible with the old
1618  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1619  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1620  * parameters are compatible with DVB-S spec.
1621  */
1622 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1623 {
1624         int i;
1625         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1626
1627         c->delivery_system = delsys;
1628
1629         /*
1630          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1631          */
1632         if (c->delivery_system == SYS_ISDBT) {
1633                 dev_dbg(fe->dvb->device,
1634                         "%s: Using defaults for SYS_ISDBT\n",
1635                         __func__);
1636
1637                 if (!c->bandwidth_hz)
1638                         c->bandwidth_hz = 6000000;
1639
1640                 c->isdbt_partial_reception = 0;
1641                 c->isdbt_sb_mode = 0;
1642                 c->isdbt_sb_subchannel = 0;
1643                 c->isdbt_sb_segment_idx = 0;
1644                 c->isdbt_sb_segment_count = 0;
1645                 c->isdbt_layer_enabled = 7;
1646                 for (i = 0; i < 3; i++) {
1647                         c->layer[i].fec = FEC_AUTO;
1648                         c->layer[i].modulation = QAM_AUTO;
1649                         c->layer[i].interleaving = 0;
1650                         c->layer[i].segment_count = 0;
1651                 }
1652         }
1653         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1654                 __func__, c->delivery_system);
1655
1656         return 0;
1657 }
1658
1659 /**
1660  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1661  * @fe:                 frontend struct
1662  * @desired_system:     delivery system requested by the user
1663  *
1664  * A DVBv5 call know what's the desired system it wants. So, set it.
1665  *
1666  * There are, however, a few known issues with early DVBv5 applications that
1667  * are also handled by this logic:
1668  *
1669  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1670  *    This is an API violation, but, as we don't want to break userspace,
1671  *    convert it to the first supported delivery system.
1672  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1673  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1674  *    ISDB-T provided backward compat with DVB-T.
1675  */
1676 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1677                                      u32 desired_system)
1678 {
1679         int ncaps;
1680         u32 delsys = SYS_UNDEFINED;
1681         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1682         enum dvbv3_emulation_type type;
1683
1684         /*
1685          * It was reported that some old DVBv5 applications were
1686          * filling delivery_system with SYS_UNDEFINED. If this happens,
1687          * assume that the application wants to use the first supported
1688          * delivery system.
1689          */
1690         if (desired_system == SYS_UNDEFINED)
1691                 desired_system = fe->ops.delsys[0];
1692
1693         /*
1694          * This is a DVBv5 call. So, it likely knows the supported
1695          * delivery systems. So, check if the desired delivery system is
1696          * supported
1697          */
1698         ncaps = 0;
1699         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1700                 if (fe->ops.delsys[ncaps] == desired_system) {
1701                         c->delivery_system = desired_system;
1702                         dev_dbg(fe->dvb->device,
1703                                         "%s: Changing delivery system to %d\n",
1704                                         __func__, desired_system);
1705                         return 0;
1706                 }
1707                 ncaps++;
1708         }
1709
1710         /*
1711          * The requested delivery system isn't supported. Maybe userspace
1712          * is requesting a DVBv3 compatible delivery system.
1713          *
1714          * The emulation only works if the desired system is one of the
1715          * delivery systems supported by DVBv3 API
1716          */
1717         if (!is_dvbv3_delsys(desired_system)) {
1718                 dev_dbg(fe->dvb->device,
1719                         "%s: Delivery system %d not supported.\n",
1720                         __func__, desired_system);
1721                 return -EINVAL;
1722         }
1723
1724         type = dvbv3_type(desired_system);
1725
1726         /*
1727         * Get the last non-DVBv3 delivery system that has the same type
1728         * of the desired system
1729         */
1730         ncaps = 0;
1731         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1732                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1733                         delsys = fe->ops.delsys[ncaps];
1734                 ncaps++;
1735         }
1736
1737         /* There's nothing compatible with the desired delivery system */
1738         if (delsys == SYS_UNDEFINED) {
1739                 dev_dbg(fe->dvb->device,
1740                         "%s: Delivery system %d not supported on emulation mode.\n",
1741                         __func__, desired_system);
1742                 return -EINVAL;
1743         }
1744
1745         dev_dbg(fe->dvb->device,
1746                 "%s: Using delivery system %d emulated as if it were %d\n",
1747                 __func__, delsys, desired_system);
1748
1749         return emulate_delivery_system(fe, desired_system);
1750 }
1751
1752 /**
1753  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1754  * @fe: frontend struct
1755  *
1756  * A DVBv3 call doesn't know what's the desired system it wants. It also
1757  * doesn't allow to switch between different types. Due to that, userspace
1758  * should use DVBv5 instead.
1759  * However, in order to avoid breaking userspace API, limited backward
1760  * compatibility support is provided.
1761  *
1762  * There are some delivery systems that are incompatible with DVBv3 calls.
1763  *
1764  * This routine should work fine for frontends that support just one delivery
1765  * system.
1766  *
1767  * For frontends that support multiple frontends:
1768  * 1) It defaults to use the first supported delivery system. There's an
1769  *    userspace application that allows changing it at runtime;
1770  *
1771  * 2) If the current delivery system is not compatible with DVBv3, it gets
1772  *    the first one that it is compatible.
1773  *
1774  * NOTE: in order for this to work with applications like Kaffeine that
1775  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1776  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1777  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1778  *      to DVB-S.
1779  */
1780 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1781 {
1782         int ncaps;
1783         u32 delsys = SYS_UNDEFINED;
1784         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1785
1786         /* If not set yet, defaults to the first supported delivery system */
1787         if (c->delivery_system == SYS_UNDEFINED)
1788                 c->delivery_system = fe->ops.delsys[0];
1789
1790         /*
1791          * Trivial case: just use the current one, if it already a DVBv3
1792          * delivery system
1793          */
1794         if (is_dvbv3_delsys(c->delivery_system)) {
1795                 dev_dbg(fe->dvb->device,
1796                                 "%s: Using delivery system to %d\n",
1797                                 __func__, c->delivery_system);
1798                 return 0;
1799         }
1800
1801         /*
1802          * Seek for the first delivery system that it is compatible with a
1803          * DVBv3 standard
1804          */
1805         ncaps = 0;
1806         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1807                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1808                         delsys = fe->ops.delsys[ncaps];
1809                         break;
1810                 }
1811                 ncaps++;
1812         }
1813         if (delsys == SYS_UNDEFINED) {
1814                 dev_dbg(fe->dvb->device,
1815                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1816                         __func__);
1817                 return -EINVAL;
1818         }
1819         return emulate_delivery_system(fe, delsys);
1820 }
1821
1822 static int dtv_property_process_set(struct dvb_frontend *fe,
1823                                     struct dtv_property *tvp,
1824                                     struct file *file)
1825 {
1826         int r = 0;
1827         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1828
1829         /* Allow the frontend to validate incoming properties */
1830         if (fe->ops.set_property) {
1831                 r = fe->ops.set_property(fe, tvp);
1832                 if (r < 0)
1833                         return r;
1834         }
1835
1836         switch(tvp->cmd) {
1837         case DTV_CLEAR:
1838                 /*
1839                  * Reset a cache of data specific to the frontend here. This does
1840                  * not effect hardware.
1841                  */
1842                 dvb_frontend_clear_cache(fe);
1843                 break;
1844         case DTV_TUNE:
1845                 /* interpret the cache of data, build either a traditional frontend
1846                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1847                  * ioctl.
1848                  */
1849                 c->state = tvp->cmd;
1850                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1851                                 __func__);
1852
1853                 r = dtv_set_frontend(fe);
1854                 break;
1855         case DTV_FREQUENCY:
1856                 c->frequency = tvp->u.data;
1857                 break;
1858         case DTV_MODULATION:
1859                 c->modulation = tvp->u.data;
1860                 break;
1861         case DTV_BANDWIDTH_HZ:
1862                 c->bandwidth_hz = tvp->u.data;
1863                 break;
1864         case DTV_INVERSION:
1865                 c->inversion = tvp->u.data;
1866                 break;
1867         case DTV_SYMBOL_RATE:
1868                 c->symbol_rate = tvp->u.data;
1869                 break;
1870         case DTV_INNER_FEC:
1871                 c->fec_inner = tvp->u.data;
1872                 break;
1873         case DTV_PILOT:
1874                 c->pilot = tvp->u.data;
1875                 break;
1876         case DTV_ROLLOFF:
1877                 c->rolloff = tvp->u.data;
1878                 break;
1879         case DTV_DELIVERY_SYSTEM:
1880                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1881                 break;
1882         case DTV_VOLTAGE:
1883                 c->voltage = tvp->u.data;
1884                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1885                         (void *)c->voltage);
1886                 break;
1887         case DTV_TONE:
1888                 c->sectone = tvp->u.data;
1889                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1890                         (void *)c->sectone);
1891                 break;
1892         case DTV_CODE_RATE_HP:
1893                 c->code_rate_HP = tvp->u.data;
1894                 break;
1895         case DTV_CODE_RATE_LP:
1896                 c->code_rate_LP = tvp->u.data;
1897                 break;
1898         case DTV_GUARD_INTERVAL:
1899                 c->guard_interval = tvp->u.data;
1900                 break;
1901         case DTV_TRANSMISSION_MODE:
1902                 c->transmission_mode = tvp->u.data;
1903                 break;
1904         case DTV_HIERARCHY:
1905                 c->hierarchy = tvp->u.data;
1906                 break;
1907         case DTV_INTERLEAVING:
1908                 c->interleaving = tvp->u.data;
1909                 break;
1910
1911         /* ISDB-T Support here */
1912         case DTV_ISDBT_PARTIAL_RECEPTION:
1913                 c->isdbt_partial_reception = tvp->u.data;
1914                 break;
1915         case DTV_ISDBT_SOUND_BROADCASTING:
1916                 c->isdbt_sb_mode = tvp->u.data;
1917                 break;
1918         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1919                 c->isdbt_sb_subchannel = tvp->u.data;
1920                 break;
1921         case DTV_ISDBT_SB_SEGMENT_IDX:
1922                 c->isdbt_sb_segment_idx = tvp->u.data;
1923                 break;
1924         case DTV_ISDBT_SB_SEGMENT_COUNT:
1925                 c->isdbt_sb_segment_count = tvp->u.data;
1926                 break;
1927         case DTV_ISDBT_LAYER_ENABLED:
1928                 c->isdbt_layer_enabled = tvp->u.data;
1929                 break;
1930         case DTV_ISDBT_LAYERA_FEC:
1931                 c->layer[0].fec = tvp->u.data;
1932                 break;
1933         case DTV_ISDBT_LAYERA_MODULATION:
1934                 c->layer[0].modulation = tvp->u.data;
1935                 break;
1936         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1937                 c->layer[0].segment_count = tvp->u.data;
1938                 break;
1939         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1940                 c->layer[0].interleaving = tvp->u.data;
1941                 break;
1942         case DTV_ISDBT_LAYERB_FEC:
1943                 c->layer[1].fec = tvp->u.data;
1944                 break;
1945         case DTV_ISDBT_LAYERB_MODULATION:
1946                 c->layer[1].modulation = tvp->u.data;
1947                 break;
1948         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1949                 c->layer[1].segment_count = tvp->u.data;
1950                 break;
1951         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1952                 c->layer[1].interleaving = tvp->u.data;
1953                 break;
1954         case DTV_ISDBT_LAYERC_FEC:
1955                 c->layer[2].fec = tvp->u.data;
1956                 break;
1957         case DTV_ISDBT_LAYERC_MODULATION:
1958                 c->layer[2].modulation = tvp->u.data;
1959                 break;
1960         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1961                 c->layer[2].segment_count = tvp->u.data;
1962                 break;
1963         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1964                 c->layer[2].interleaving = tvp->u.data;
1965                 break;
1966
1967         /* Multistream support */
1968         case DTV_STREAM_ID:
1969         case DTV_DVBT2_PLP_ID_LEGACY:
1970                 c->stream_id = tvp->u.data;
1971                 break;
1972
1973         /* ATSC-MH */
1974         case DTV_ATSCMH_PARADE_ID:
1975                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1976                 break;
1977         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1978                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1979                 break;
1980
1981         case DTV_LNA:
1982                 c->lna = tvp->u.data;
1983                 if (fe->ops.set_lna)
1984                         r = fe->ops.set_lna(fe);
1985                 if (r < 0)
1986                         c->lna = LNA_AUTO;
1987                 break;
1988
1989         default:
1990                 return -EINVAL;
1991         }
1992
1993         return r;
1994 }
1995
1996 static int dvb_frontend_ioctl(struct file *file,
1997                         unsigned int cmd, void *parg)
1998 {
1999         struct dvb_device *dvbdev = file->private_data;
2000         struct dvb_frontend *fe = dvbdev->priv;
2001         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2002         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2003         int err = -EOPNOTSUPP;
2004
2005         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
2006         if (down_interruptible(&fepriv->sem))
2007                 return -ERESTARTSYS;
2008
2009         if (fe->exit != DVB_FE_NO_EXIT) {
2010                 up(&fepriv->sem);
2011                 return -ENODEV;
2012         }
2013
2014         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
2015             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
2016              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2017                 up(&fepriv->sem);
2018                 return -EPERM;
2019         }
2020
2021         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
2022                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
2023         else {
2024                 c->state = DTV_UNDEFINED;
2025                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
2026         }
2027
2028         up(&fepriv->sem);
2029         return err;
2030 }
2031
2032 static int dvb_frontend_ioctl_properties(struct file *file,
2033                         unsigned int cmd, void *parg)
2034 {
2035         struct dvb_device *dvbdev = file->private_data;
2036         struct dvb_frontend *fe = dvbdev->priv;
2037         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2038         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2039         int err = 0;
2040
2041         struct dtv_properties *tvps = parg;
2042         struct dtv_property *tvp = NULL;
2043         int i;
2044
2045         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2046
2047         if (cmd == FE_SET_PROPERTY) {
2048                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2049                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2050
2051                 /* Put an arbitrary limit on the number of messages that can
2052                  * be sent at once */
2053                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2054                         return -EINVAL;
2055
2056                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2057                 if (!tvp) {
2058                         err = -ENOMEM;
2059                         goto out;
2060                 }
2061
2062                 if (copy_from_user(tvp, (void __user *)tvps->props,
2063                                    tvps->num * sizeof(struct dtv_property))) {
2064                         err = -EFAULT;
2065                         goto out;
2066                 }
2067
2068                 for (i = 0; i < tvps->num; i++) {
2069                         err = dtv_property_process_set(fe, tvp + i, file);
2070                         if (err < 0)
2071                                 goto out;
2072                         (tvp + i)->result = err;
2073                 }
2074
2075                 if (c->state == DTV_TUNE)
2076                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
2077
2078         } else if (cmd == FE_GET_PROPERTY) {
2079                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2080                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2081
2082                 /* Put an arbitrary limit on the number of messages that can
2083                  * be sent at once */
2084                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2085                         return -EINVAL;
2086
2087                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2088                 if (!tvp) {
2089                         err = -ENOMEM;
2090                         goto out;
2091                 }
2092
2093                 if (copy_from_user(tvp, (void __user *)tvps->props,
2094                                    tvps->num * sizeof(struct dtv_property))) {
2095                         err = -EFAULT;
2096                         goto out;
2097                 }
2098
2099                 /*
2100                  * Fills the cache out struct with the cache contents, plus
2101                  * the data retrieved from get_frontend, if the frontend
2102                  * is not idle. Otherwise, returns the cached content
2103                  */
2104                 if (fepriv->state != FESTATE_IDLE) {
2105                         err = dtv_get_frontend(fe, NULL);
2106                         if (err < 0)
2107                                 goto out;
2108                 }
2109                 for (i = 0; i < tvps->num; i++) {
2110                         err = dtv_property_process_get(fe, c, tvp + i, file);
2111                         if (err < 0)
2112                                 goto out;
2113                         (tvp + i)->result = err;
2114                 }
2115
2116                 if (copy_to_user((void __user *)tvps->props, tvp,
2117                                  tvps->num * sizeof(struct dtv_property))) {
2118                         err = -EFAULT;
2119                         goto out;
2120                 }
2121
2122         } else
2123                 err = -EOPNOTSUPP;
2124
2125 out:
2126         kfree(tvp);
2127         return err;
2128 }
2129
2130 static int dtv_set_frontend(struct dvb_frontend *fe)
2131 {
2132         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2133         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2134         struct dvb_frontend_tune_settings fetunesettings;
2135         u32 rolloff = 0;
2136
2137         if (dvb_frontend_check_parameters(fe) < 0)
2138                 return -EINVAL;
2139
2140         /*
2141          * Initialize output parameters to match the values given by
2142          * the user. FE_SET_FRONTEND triggers an initial frontend event
2143          * with status = 0, which copies output parameters to userspace.
2144          */
2145         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2146
2147         /*
2148          * Be sure that the bandwidth will be filled for all
2149          * non-satellite systems, as tuners need to know what
2150          * low pass/Nyquist half filter should be applied, in
2151          * order to avoid inter-channel noise.
2152          *
2153          * ISDB-T and DVB-T/T2 already sets bandwidth.
2154          * ATSC and DVB-C don't set, so, the core should fill it.
2155          *
2156          * On DVB-C Annex A and C, the bandwidth is a function of
2157          * the roll-off and symbol rate. Annex B defines different
2158          * roll-off factors depending on the modulation. Fortunately,
2159          * Annex B is only used with 6MHz, so there's no need to
2160          * calculate it.
2161          *
2162          * While not officially supported, a side effect of handling it at
2163          * the cache level is that a program could retrieve the bandwidth
2164          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2165          */
2166         switch (c->delivery_system) {
2167         case SYS_ATSC:
2168         case SYS_DVBC_ANNEX_B:
2169                 c->bandwidth_hz = 6000000;
2170                 break;
2171         case SYS_DVBC_ANNEX_A:
2172                 rolloff = 115;
2173                 break;
2174         case SYS_DVBC_ANNEX_C:
2175                 rolloff = 113;
2176                 break;
2177         case SYS_DVBS:
2178         case SYS_TURBO:
2179         case SYS_ISDBS:
2180                 rolloff = 135;
2181                 break;
2182         case SYS_DVBS2:
2183                 switch (c->rolloff) {
2184                 case ROLLOFF_20:
2185                         rolloff = 120;
2186                         break;
2187                 case ROLLOFF_25:
2188                         rolloff = 125;
2189                         break;
2190                 default:
2191                 case ROLLOFF_35:
2192                         rolloff = 135;
2193                 }
2194                 break;
2195         default:
2196                 break;
2197         }
2198         if (rolloff)
2199                 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2200
2201         /* force auto frequency inversion if requested */
2202         if (dvb_force_auto_inversion)
2203                 c->inversion = INVERSION_AUTO;
2204
2205         /*
2206          * without hierarchical coding code_rate_LP is irrelevant,
2207          * so we tolerate the otherwise invalid FEC_NONE setting
2208          */
2209         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2210                 c->code_rate_LP = FEC_AUTO;
2211
2212         /* get frontend-specific tuning settings */
2213         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2214         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2215                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2216                 fepriv->max_drift = fetunesettings.max_drift;
2217                 fepriv->step_size = fetunesettings.step_size;
2218         } else {
2219                 /* default values */
2220                 switch (c->delivery_system) {
2221                 case SYS_DVBS:
2222                 case SYS_DVBS2:
2223                 case SYS_ISDBS:
2224                 case SYS_TURBO:
2225                 case SYS_DVBC_ANNEX_A:
2226                 case SYS_DVBC_ANNEX_C:
2227                         fepriv->min_delay = HZ / 20;
2228                         fepriv->step_size = c->symbol_rate / 16000;
2229                         fepriv->max_drift = c->symbol_rate / 2000;
2230                         break;
2231                 case SYS_DVBT:
2232                 case SYS_DVBT2:
2233                 case SYS_ISDBT:
2234                 case SYS_DTMB:
2235                         fepriv->min_delay = HZ / 20;
2236                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2237                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2238                         break;
2239                 default:
2240                         /*
2241                          * FIXME: This sounds wrong! if freqency_stepsize is
2242                          * defined by the frontend, why not use it???
2243                          */
2244                         fepriv->min_delay = HZ / 20;
2245                         fepriv->step_size = 0; /* no zigzag */
2246                         fepriv->max_drift = 0;
2247                         break;
2248                 }
2249         }
2250         if (dvb_override_tune_delay > 0)
2251                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2252
2253         fepriv->state = FESTATE_RETUNE;
2254
2255         /* Request the search algorithm to search */
2256         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2257
2258         dvb_frontend_clear_events(fe);
2259         dvb_frontend_add_event(fe, 0);
2260         dvb_frontend_wakeup(fe);
2261         fepriv->status = 0;
2262
2263         return 0;
2264 }
2265
2266
2267 static int dvb_frontend_ioctl_legacy(struct file *file,
2268                         unsigned int cmd, void *parg)
2269 {
2270         struct dvb_device *dvbdev = file->private_data;
2271         struct dvb_frontend *fe = dvbdev->priv;
2272         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2273         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2274         int err = -EOPNOTSUPP;
2275
2276         switch (cmd) {
2277         case FE_GET_INFO: {
2278                 struct dvb_frontend_info* info = parg;
2279
2280                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2281                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2282
2283                 /*
2284                  * Associate the 4 delivery systems supported by DVBv3
2285                  * API with their DVBv5 counterpart. For the other standards,
2286                  * use the closest type, assuming that it would hopefully
2287                  * work with a DVBv3 application.
2288                  * It should be noticed that, on multi-frontend devices with
2289                  * different types (terrestrial and cable, for example),
2290                  * a pure DVBv3 application won't be able to use all delivery
2291                  * systems. Yet, changing the DVBv5 cache to the other delivery
2292                  * system should be enough for making it work.
2293                  */
2294                 switch (dvbv3_type(c->delivery_system)) {
2295                 case DVBV3_QPSK:
2296                         info->type = FE_QPSK;
2297                         break;
2298                 case DVBV3_ATSC:
2299                         info->type = FE_ATSC;
2300                         break;
2301                 case DVBV3_QAM:
2302                         info->type = FE_QAM;
2303                         break;
2304                 case DVBV3_OFDM:
2305                         info->type = FE_OFDM;
2306                         break;
2307                 default:
2308                         dev_err(fe->dvb->device,
2309                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2310                                         __func__, c->delivery_system);
2311                         fe->ops.info.type = FE_OFDM;
2312                 }
2313                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2314                                  __func__, c->delivery_system, fe->ops.info.type);
2315
2316                 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2317                 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2318                         info->caps |= FE_CAN_INVERSION_AUTO;
2319                 err = 0;
2320                 break;
2321         }
2322
2323         case FE_READ_STATUS: {
2324                 enum fe_status *status = parg;
2325
2326                 /* if retune was requested but hasn't occurred yet, prevent
2327                  * that user get signal state from previous tuning */
2328                 if (fepriv->state == FESTATE_RETUNE ||
2329                     fepriv->state == FESTATE_ERROR) {
2330                         err=0;
2331                         *status = 0;
2332                         break;
2333                 }
2334
2335                 if (fe->ops.read_status)
2336                         err = fe->ops.read_status(fe, status);
2337                 break;
2338         }
2339
2340         case FE_READ_BER:
2341                 if (fe->ops.read_ber) {
2342                         if (fepriv->thread)
2343                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2344                         else
2345                                 err = -EAGAIN;
2346                 }
2347                 break;
2348
2349         case FE_READ_SIGNAL_STRENGTH:
2350                 if (fe->ops.read_signal_strength) {
2351                         if (fepriv->thread)
2352                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2353                         else
2354                                 err = -EAGAIN;
2355                 }
2356                 break;
2357
2358         case FE_READ_SNR:
2359                 if (fe->ops.read_snr) {
2360                         if (fepriv->thread)
2361                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2362                         else
2363                                 err = -EAGAIN;
2364                 }
2365                 break;
2366
2367         case FE_READ_UNCORRECTED_BLOCKS:
2368                 if (fe->ops.read_ucblocks) {
2369                         if (fepriv->thread)
2370                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2371                         else
2372                                 err = -EAGAIN;
2373                 }
2374                 break;
2375
2376         case FE_DISEQC_RESET_OVERLOAD:
2377                 if (fe->ops.diseqc_reset_overload) {
2378                         err = fe->ops.diseqc_reset_overload(fe);
2379                         fepriv->state = FESTATE_DISEQC;
2380                         fepriv->status = 0;
2381                 }
2382                 break;
2383
2384         case FE_DISEQC_SEND_MASTER_CMD:
2385                 if (fe->ops.diseqc_send_master_cmd) {
2386                         struct dvb_diseqc_master_cmd *cmd = parg;
2387
2388                         if (cmd->msg_len > sizeof(cmd->msg)) {
2389                                 err = -EINVAL;
2390                                 break;
2391                         }
2392                         err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2393                         fepriv->state = FESTATE_DISEQC;
2394                         fepriv->status = 0;
2395                 }
2396                 break;
2397
2398         case FE_DISEQC_SEND_BURST:
2399                 if (fe->ops.diseqc_send_burst) {
2400                         err = fe->ops.diseqc_send_burst(fe,
2401                                                 (enum fe_sec_mini_cmd)parg);
2402                         fepriv->state = FESTATE_DISEQC;
2403                         fepriv->status = 0;
2404                 }
2405                 break;
2406
2407         case FE_SET_TONE:
2408                 if (fe->ops.set_tone) {
2409                         err = fe->ops.set_tone(fe,
2410                                                (enum fe_sec_tone_mode)parg);
2411                         fepriv->tone = (enum fe_sec_tone_mode)parg;
2412                         fepriv->state = FESTATE_DISEQC;
2413                         fepriv->status = 0;
2414                 }
2415                 break;
2416
2417         case FE_SET_VOLTAGE:
2418                 if (fe->ops.set_voltage) {
2419                         err = fe->ops.set_voltage(fe,
2420                                                   (enum fe_sec_voltage)parg);
2421                         fepriv->voltage = (enum fe_sec_voltage)parg;
2422                         fepriv->state = FESTATE_DISEQC;
2423                         fepriv->status = 0;
2424                 }
2425                 break;
2426
2427         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2428                 if (fe->ops.dishnetwork_send_legacy_command) {
2429                         err = fe->ops.dishnetwork_send_legacy_command(fe,
2430                                                          (unsigned long)parg);
2431                         fepriv->state = FESTATE_DISEQC;
2432                         fepriv->status = 0;
2433                 } else if (fe->ops.set_voltage) {
2434                         /*
2435                          * NOTE: This is a fallback condition.  Some frontends
2436                          * (stv0299 for instance) take longer than 8msec to
2437                          * respond to a set_voltage command.  Those switches
2438                          * need custom routines to switch properly.  For all
2439                          * other frontends, the following should work ok.
2440                          * Dish network legacy switches (as used by Dish500)
2441                          * are controlled by sending 9-bit command words
2442                          * spaced 8msec apart.
2443                          * the actual command word is switch/port dependent
2444                          * so it is up to the userspace application to send
2445                          * the right command.
2446                          * The command must always start with a '0' after
2447                          * initialization, so parg is 8 bits and does not
2448                          * include the initialization or start bit
2449                          */
2450                         unsigned long swcmd = ((unsigned long) parg) << 1;
2451                         ktime_t nexttime;
2452                         ktime_t tv[10];
2453                         int i;
2454                         u8 last = 1;
2455                         if (dvb_frontend_debug)
2456                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2457                         nexttime = ktime_get_real();
2458                         if (dvb_frontend_debug)
2459                                 tv[0] = nexttime;
2460                         /* before sending a command, initialize by sending
2461                          * a 32ms 18V to the switch
2462                          */
2463                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2464                         dvb_frontend_sleep_until(&nexttime, 32000);
2465
2466                         for (i = 0; i < 9; i++) {
2467                                 if (dvb_frontend_debug)
2468                                         tv[i+1] = ktime_get_real();
2469                                 if ((swcmd & 0x01) != last) {
2470                                         /* set voltage to (last ? 13V : 18V) */
2471                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2472                                         last = (last) ? 0 : 1;
2473                                 }
2474                                 swcmd = swcmd >> 1;
2475                                 if (i != 8)
2476                                         dvb_frontend_sleep_until(&nexttime, 8000);
2477                         }
2478                         if (dvb_frontend_debug) {
2479                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2480                                         __func__, fe->dvb->num);
2481                                 for (i = 1; i < 10; i++)
2482                                         printk("%d: %d\n", i,
2483                                         (int) ktime_us_delta(tv[i], tv[i-1]));
2484                         }
2485                         err = 0;
2486                         fepriv->state = FESTATE_DISEQC;
2487                         fepriv->status = 0;
2488                 }
2489                 break;
2490
2491         case FE_DISEQC_RECV_SLAVE_REPLY:
2492                 if (fe->ops.diseqc_recv_slave_reply)
2493                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2494                 break;
2495
2496         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2497                 if (fe->ops.enable_high_lnb_voltage)
2498                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2499                 break;
2500
2501         case FE_SET_FRONTEND:
2502                 err = dvbv3_set_delivery_system(fe);
2503                 if (err)
2504                         break;
2505
2506                 err = dtv_property_cache_sync(fe, c, parg);
2507                 if (err)
2508                         break;
2509                 err = dtv_set_frontend(fe);
2510                 break;
2511         case FE_GET_EVENT:
2512                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2513                 break;
2514
2515         case FE_GET_FRONTEND:
2516                 err = dtv_get_frontend(fe, parg);
2517                 break;
2518
2519         case FE_SET_FRONTEND_TUNE_MODE:
2520                 fepriv->tune_mode_flags = (unsigned long) parg;
2521                 err = 0;
2522                 break;
2523         }
2524
2525         return err;
2526 }
2527
2528
2529 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2530 {
2531         struct dvb_device *dvbdev = file->private_data;
2532         struct dvb_frontend *fe = dvbdev->priv;
2533         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2534
2535         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2536
2537         poll_wait (file, &fepriv->events.wait_queue, wait);
2538
2539         if (fepriv->events.eventw != fepriv->events.eventr)
2540                 return (POLLIN | POLLRDNORM | POLLPRI);
2541
2542         return 0;
2543 }
2544
2545 static int dvb_frontend_open(struct inode *inode, struct file *file)
2546 {
2547         struct dvb_device *dvbdev = file->private_data;
2548         struct dvb_frontend *fe = dvbdev->priv;
2549         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2550         struct dvb_adapter *adapter = fe->dvb;
2551         int ret;
2552
2553         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2554         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2555                 return -ENODEV;
2556
2557         if (adapter->mfe_shared) {
2558                 mutex_lock (&adapter->mfe_lock);
2559
2560                 if (adapter->mfe_dvbdev == NULL)
2561                         adapter->mfe_dvbdev = dvbdev;
2562
2563                 else if (adapter->mfe_dvbdev != dvbdev) {
2564                         struct dvb_device
2565                                 *mfedev = adapter->mfe_dvbdev;
2566                         struct dvb_frontend
2567                                 *mfe = mfedev->priv;
2568                         struct dvb_frontend_private
2569                                 *mfepriv = mfe->frontend_priv;
2570                         int mferetry = (dvb_mfe_wait_time << 1);
2571
2572                         mutex_unlock (&adapter->mfe_lock);
2573                         while (mferetry-- && (mfedev->users != -1 ||
2574                                         mfepriv->thread != NULL)) {
2575                                 if(msleep_interruptible(500)) {
2576                                         if(signal_pending(current))
2577                                                 return -EINTR;
2578                                 }
2579                         }
2580
2581                         mutex_lock (&adapter->mfe_lock);
2582                         if(adapter->mfe_dvbdev != dvbdev) {
2583                                 mfedev = adapter->mfe_dvbdev;
2584                                 mfe = mfedev->priv;
2585                                 mfepriv = mfe->frontend_priv;
2586                                 if (mfedev->users != -1 ||
2587                                                 mfepriv->thread != NULL) {
2588                                         mutex_unlock (&adapter->mfe_lock);
2589                                         return -EBUSY;
2590                                 }
2591                                 adapter->mfe_dvbdev = dvbdev;
2592                         }
2593                 }
2594         }
2595
2596         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2597                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2598                         goto err0;
2599
2600                 /* If we took control of the bus, we need to force
2601                    reinitialization.  This is because many ts_bus_ctrl()
2602                    functions strobe the RESET pin on the demod, and if the
2603                    frontend thread already exists then the dvb_init() routine
2604                    won't get called (which is what usually does initial
2605                    register configuration). */
2606                 fepriv->reinitialise = 1;
2607         }
2608
2609         if ((ret = dvb_generic_open (inode, file)) < 0)
2610                 goto err1;
2611
2612         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2613                 /* normal tune mode when opened R/W */
2614                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2615                 fepriv->tone = -1;
2616                 fepriv->voltage = -1;
2617
2618                 ret = dvb_frontend_start (fe);
2619                 if (ret)
2620                         goto err2;
2621
2622                 /*  empty event queue */
2623                 fepriv->events.eventr = fepriv->events.eventw = 0;
2624         }
2625
2626         if (adapter->mfe_shared)
2627                 mutex_unlock (&adapter->mfe_lock);
2628         return ret;
2629
2630 err2:
2631         dvb_generic_release(inode, file);
2632 err1:
2633         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2634                 fe->ops.ts_bus_ctrl(fe, 0);
2635 err0:
2636         if (adapter->mfe_shared)
2637                 mutex_unlock (&adapter->mfe_lock);
2638         return ret;
2639 }
2640
2641 static int dvb_frontend_release(struct inode *inode, struct file *file)
2642 {
2643         struct dvb_device *dvbdev = file->private_data;
2644         struct dvb_frontend *fe = dvbdev->priv;
2645         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2646         int ret;
2647
2648         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2649
2650         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2651                 fepriv->release_jiffies = jiffies;
2652                 mb();
2653         }
2654
2655         ret = dvb_generic_release (inode, file);
2656
2657         if (dvbdev->users == -1) {
2658                 wake_up(&fepriv->wait_queue);
2659                 if (fe->exit != DVB_FE_NO_EXIT)
2660                         wake_up(&dvbdev->wait_queue);
2661                 if (fe->ops.ts_bus_ctrl)
2662                         fe->ops.ts_bus_ctrl(fe, 0);
2663         }
2664
2665         return ret;
2666 }
2667
2668 static const struct file_operations dvb_frontend_fops = {
2669         .owner          = THIS_MODULE,
2670         .unlocked_ioctl = dvb_generic_ioctl,
2671         .poll           = dvb_frontend_poll,
2672         .open           = dvb_frontend_open,
2673         .release        = dvb_frontend_release,
2674         .llseek         = noop_llseek,
2675 };
2676
2677 int dvb_frontend_suspend(struct dvb_frontend *fe)
2678 {
2679         int ret = 0;
2680
2681         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2682                         fe->id);
2683
2684         if (fe->ops.tuner_ops.suspend)
2685                 ret = fe->ops.tuner_ops.suspend(fe);
2686         else if (fe->ops.tuner_ops.sleep)
2687                 ret = fe->ops.tuner_ops.sleep(fe);
2688
2689         if (fe->ops.sleep)
2690                 ret = fe->ops.sleep(fe);
2691
2692         return ret;
2693 }
2694 EXPORT_SYMBOL(dvb_frontend_suspend);
2695
2696 int dvb_frontend_resume(struct dvb_frontend *fe)
2697 {
2698         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2699         int ret = 0;
2700
2701         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2702                         fe->id);
2703
2704         fe->exit = DVB_FE_DEVICE_RESUME;
2705         if (fe->ops.init)
2706                 ret = fe->ops.init(fe);
2707
2708         if (fe->ops.tuner_ops.resume)
2709                 ret = fe->ops.tuner_ops.resume(fe);
2710         else if (fe->ops.tuner_ops.init)
2711                 ret = fe->ops.tuner_ops.init(fe);
2712
2713         fe->exit = DVB_FE_NO_EXIT;
2714         fepriv->state = FESTATE_RETUNE;
2715         dvb_frontend_wakeup(fe);
2716
2717         return ret;
2718 }
2719 EXPORT_SYMBOL(dvb_frontend_resume);
2720
2721 int dvb_register_frontend(struct dvb_adapter* dvb,
2722                           struct dvb_frontend* fe)
2723 {
2724         struct dvb_frontend_private *fepriv;
2725         const struct dvb_device dvbdev_template = {
2726                 .users = ~0,
2727                 .writers = 1,
2728                 .readers = (~0)-1,
2729                 .fops = &dvb_frontend_fops,
2730 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2731                 .name = fe->ops.info.name,
2732 #endif
2733                 .kernel_ioctl = dvb_frontend_ioctl
2734         };
2735
2736         dev_dbg(dvb->device, "%s:\n", __func__);
2737
2738         if (mutex_lock_interruptible(&frontend_mutex))
2739                 return -ERESTARTSYS;
2740
2741         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2742         if (fe->frontend_priv == NULL) {
2743                 mutex_unlock(&frontend_mutex);
2744                 return -ENOMEM;
2745         }
2746         fepriv = fe->frontend_priv;
2747
2748         sema_init(&fepriv->sem, 1);
2749         init_waitqueue_head (&fepriv->wait_queue);
2750         init_waitqueue_head (&fepriv->events.wait_queue);
2751         mutex_init(&fepriv->events.mtx);
2752         fe->dvb = dvb;
2753         fepriv->inversion = INVERSION_OFF;
2754
2755         dev_info(fe->dvb->device,
2756                         "DVB: registering adapter %i frontend %i (%s)...\n",
2757                         fe->dvb->num, fe->id, fe->ops.info.name);
2758
2759         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2760                              fe, DVB_DEVICE_FRONTEND);
2761
2762         /*
2763          * Initialize the cache to the proper values according with the
2764          * first supported delivery system (ops->delsys[0])
2765          */
2766
2767         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2768         dvb_frontend_clear_cache(fe);
2769
2770         mutex_unlock(&frontend_mutex);
2771         return 0;
2772 }
2773 EXPORT_SYMBOL(dvb_register_frontend);
2774
2775 int dvb_unregister_frontend(struct dvb_frontend* fe)
2776 {
2777         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2778         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2779
2780         mutex_lock(&frontend_mutex);
2781         dvb_frontend_stop (fe);
2782         mutex_unlock(&frontend_mutex);
2783
2784         if (fepriv->dvbdev->users < -1)
2785                 wait_event(fepriv->dvbdev->wait_queue,
2786                                 fepriv->dvbdev->users==-1);
2787
2788         mutex_lock(&frontend_mutex);
2789         dvb_unregister_device (fepriv->dvbdev);
2790
2791         /* fe is invalid now */
2792         kfree(fepriv);
2793         mutex_unlock(&frontend_mutex);
2794         return 0;
2795 }
2796 EXPORT_SYMBOL(dvb_unregister_frontend);
2797
2798 #ifdef CONFIG_MEDIA_ATTACH
2799 void dvb_frontend_detach(struct dvb_frontend* fe)
2800 {
2801         void *ptr;
2802
2803         if (fe->ops.release_sec) {
2804                 fe->ops.release_sec(fe);
2805                 dvb_detach(fe->ops.release_sec);
2806         }
2807         if (fe->ops.tuner_ops.release) {
2808                 fe->ops.tuner_ops.release(fe);
2809                 dvb_detach(fe->ops.tuner_ops.release);
2810         }
2811         if (fe->ops.analog_ops.release) {
2812                 fe->ops.analog_ops.release(fe);
2813                 dvb_detach(fe->ops.analog_ops.release);
2814         }
2815         ptr = (void*)fe->ops.release;
2816         if (ptr) {
2817                 fe->ops.release(fe);
2818                 dvb_detach(ptr);
2819         }
2820 }
2821 #else
2822 void dvb_frontend_detach(struct dvb_frontend* fe)
2823 {
2824         if (fe->ops.release_sec)
2825                 fe->ops.release_sec(fe);
2826         if (fe->ops.tuner_ops.release)
2827                 fe->ops.tuner_ops.release(fe);
2828         if (fe->ops.analog_ops.release)
2829                 fe->ops.analog_ops.release(fe);
2830         if (fe->ops.release)
2831                 fe->ops.release(fe);
2832 }
2833 #endif
2834 EXPORT_SYMBOL(dvb_frontend_detach);