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 #define FE_ALGO_HW              1
  85 /*
  86  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  87  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  88  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  89  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  90  * FESTATE_TUNED. The frontend has successfully locked on.
  91  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  92  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  93  * FESTATE_DISEQC. A DISEQC command has just been issued.
  94  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  95  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  96  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  97  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  98  */
  99
 100 static DEFINE_MUTEX(frontend_mutex);
 101
 102 struct dvb_frontend_private {
 103
 104         /* thread/frontend values */
 105         struct dvb_device *dvbdev;
 106         struct dvb_frontend_parameters parameters_out;
 107         struct dvb_fe_events events;
 108         struct semaphore sem;
 109         struct list_head list_head;
 110         wait_queue_head_t wait_queue;
 111         struct task_struct *thread;
 112         unsigned long release_jiffies;
 113         unsigned int wakeup;
 114         enum fe_status status;
 115         unsigned long tune_mode_flags;
 116         unsigned int delay;
 117         unsigned int reinitialise;
 118         int tone;
 119         int voltage;
 120
 121         /* swzigzag values */
 122         unsigned int state;
 123         unsigned int bending;
 124         int lnb_drift;
 125         unsigned int inversion;
 126         unsigned int auto_step;
 127         unsigned int auto_sub_step;
 128         unsigned int started_auto_step;
 129         unsigned int min_delay;
 130         unsigned int max_drift;
 131         unsigned int step_size;
 132         int quality;
 133         unsigned int check_wrapped;
 134         enum dvbfe_search algo_status;
 135
 136 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
 137         struct media_pipeline pipe;
 138         struct media_entity *pipe_start_entity;
 139 #endif
 140 };
 141
 142 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 143 static int dtv_get_frontend(struct dvb_frontend *fe,
 144                             struct dvb_frontend_parameters *p_out);
 145 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 146                                            struct dvb_frontend_parameters *p);
 147
 148 static bool has_get_frontend(struct dvb_frontend *fe)
 149 {
 150         return fe->ops.get_frontend != NULL;
 151 }
 152
 153 /*
 154  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 155  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 156  * otherwise, a DVBv3 call will fail.
 157  */
 158 enum dvbv3_emulation_type {
 159         DVBV3_UNKNOWN,
 160         DVBV3_QPSK,
 161         DVBV3_QAM,
 162         DVBV3_OFDM,
 163         DVBV3_ATSC,
 164 };
 165
 166 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 167 {
 168         switch (delivery_system) {
 169         case SYS_DVBC_ANNEX_A:
 170         case SYS_DVBC_ANNEX_C:
 171                 return DVBV3_QAM;
 172         case SYS_DVBS:
 173         case SYS_DVBS2:
 174         case SYS_TURBO:
 175         case SYS_ISDBS:
 176         case SYS_DSS:
 177                 return DVBV3_QPSK;
 178         case SYS_DVBT:
 179         case SYS_DVBT2:
 180         case SYS_ISDBT:
 181         case SYS_DTMB:
 182                 return DVBV3_OFDM;
 183         case SYS_ATSC:
 184         case SYS_ATSCMH:
 185         case SYS_DVBC_ANNEX_B:
 186                 return DVBV3_ATSC;
 187         case SYS_UNDEFINED:
 188         case SYS_ISDBC:
 189         case SYS_DVBH:
 190         case SYS_DAB:
 191         default:
 192                 /*
 193                  * Doesn't know how to emulate those types and/or
 194                  * there's no frontend driver from this type yet
 195                  * with some emulation code, so, we're not sure yet how
 196                  * to handle them, or they're not compatible with a DVBv3 call.
 197                  */
 198                 return DVBV3_UNKNOWN;
 199         }
 200 }
 201
 202 static void dvb_frontend_add_event(struct dvb_frontend *fe,
 203                                    enum fe_status status)
 204 {
 205         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 206         struct dvb_fe_events *events = &fepriv->events;
 207         struct dvb_frontend_event *e;
 208         int wp;
 209
 210         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 211
 212         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 213                 dtv_get_frontend(fe, &fepriv->parameters_out);
 214
 215         mutex_lock(&events->mtx);
 216
 217         wp = (events->eventw + 1) % MAX_EVENT;
 218         if (wp == events->eventr) {
 219                 events->overflow = 1;
 220                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 221         }
 222
 223         e = &events->events[events->eventw];
 224         e->status = status;
 225         e->parameters = fepriv->parameters_out;
 226
 227         events->eventw = wp;
 228
 229         mutex_unlock(&events->mtx);
 230
 231         wake_up_interruptible (&events->wait_queue);
 232 }
 233
 234 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 235                             struct dvb_frontend_event *event, int flags)
 236 {
 237         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 238         struct dvb_fe_events *events = &fepriv->events;
 239
 240         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 241
 242         if (events->overflow) {
 243                 events->overflow = 0;
 244                 return -EOVERFLOW;
 245         }
 246
 247         if (events->eventw == events->eventr) {
 248                 int ret;
 249
 250                 if (flags & O_NONBLOCK)
 251                         return -EWOULDBLOCK;
 252
 253                 up(&fepriv->sem);
 254
 255                 ret = wait_event_interruptible (events->wait_queue,
 256                                                 events->eventw != events->eventr);
 257
 258                 if (down_interruptible (&fepriv->sem))
 259                         return -ERESTARTSYS;
 260
 261                 if (ret < 0)
 262                         return ret;
 263         }
 264
 265         mutex_lock(&events->mtx);
 266         *event = events->events[events->eventr];
 267         events->eventr = (events->eventr + 1) % MAX_EVENT;
 268         mutex_unlock(&events->mtx);
 269
 270         return 0;
 271 }
 272
 273 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 274 {
 275         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 276         struct dvb_fe_events *events = &fepriv->events;
 277
 278         mutex_lock(&events->mtx);
 279         events->eventr = events->eventw;
 280         mutex_unlock(&events->mtx);
 281 }
 282
 283 static void dvb_frontend_init(struct dvb_frontend *fe)
 284 {
 285         dev_dbg(fe->dvb->device,
 286                         "%s: initialising adapter %i frontend %i (%s)...\n",
 287                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 288
 289         if (fe->ops.init)
 290                 fe->ops.init(fe);
 291         if (fe->ops.tuner_ops.init) {
 292                 if (fe->ops.i2c_gate_ctrl)
 293                         fe->ops.i2c_gate_ctrl(fe, 1);
 294                 fe->ops.tuner_ops.init(fe);
 295                 if (fe->ops.i2c_gate_ctrl)
 296                         fe->ops.i2c_gate_ctrl(fe, 0);
 297         }
 298 }
 299
 300 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 301 {
 302         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 303
 304         fepriv->reinitialise = 1;
 305         dvb_frontend_wakeup(fe);
 306 }
 307 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 308
 309 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 310 {
 311         int q2;
 312         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 313
 314         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 315
 316         if (locked)
 317                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 318         else
 319                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 320
 321         q2 = fepriv->quality - 128;
 322         q2 *= q2;
 323
 324         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 325 }
 326
 327 /**
 328  * Performs automatic twiddling of frontend parameters.
 329  *
 330  * @param fe The frontend concerned.
 331  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 332  * @returns Number of complete iterations that have been performed.
 333  */
 334 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 335 {
 336         int autoinversion;
 337         int ready = 0;
 338         int fe_set_err = 0;
 339         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 340         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 341         int original_inversion = c->inversion;
 342         u32 original_frequency = c->frequency;
 343
 344         /* are we using autoinversion? */
 345         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 346                          (c->inversion == INVERSION_AUTO));
 347
 348         /* setup parameters correctly */
 349         while(!ready) {
 350                 /* calculate the lnb_drift */
 351                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 352
 353                 /* wrap the auto_step if we've exceeded the maximum drift */
 354                 if (fepriv->lnb_drift > fepriv->max_drift) {
 355                         fepriv->auto_step = 0;
 356                         fepriv->auto_sub_step = 0;
 357                         fepriv->lnb_drift = 0;
 358                 }
 359
 360                 /* perform inversion and +/- zigzag */
 361                 switch(fepriv->auto_sub_step) {
 362                 case 0:
 363                         /* try with the current inversion and current drift setting */
 364                         ready = 1;
 365                         break;
 366
 367                 case 1:
 368                         if (!autoinversion) break;
 369
 370                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 371                         ready = 1;
 372                         break;
 373
 374                 case 2:
 375                         if (fepriv->lnb_drift == 0) break;
 376
 377                         fepriv->lnb_drift = -fepriv->lnb_drift;
 378                         ready = 1;
 379                         break;
 380
 381                 case 3:
 382                         if (fepriv->lnb_drift == 0) break;
 383                         if (!autoinversion) break;
 384
 385                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 386                         fepriv->lnb_drift = -fepriv->lnb_drift;
 387                         ready = 1;
 388                         break;
 389
 390                 default:
 391                         fepriv->auto_step++;
 392                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 393                         break;
 394                 }
 395
 396                 if (!ready) fepriv->auto_sub_step++;
 397         }
 398
 399         /* if this attempt would hit where we started, indicate a complete
 400          * iteration has occurred */
 401         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 402             (fepriv->auto_sub_step == 0) && check_wrapped) {
 403                 return 1;
 404         }
 405
 406         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 407                         "auto_sub_step:%i started_auto_step:%i\n",
 408                         __func__, fepriv->lnb_drift, fepriv->inversion,
 409                         fepriv->auto_step, fepriv->auto_sub_step,
 410                         fepriv->started_auto_step);
 411
 412         /* set the frontend itself */
 413         c->frequency += fepriv->lnb_drift;
 414         if (autoinversion)
 415                 c->inversion = fepriv->inversion;
 416         tmp = *c;
 417         if (fe->ops.set_frontend)
 418                 fe_set_err = fe->ops.set_frontend(fe);
 419         *c = tmp;
 420         if (fe_set_err < 0) {
 421                 fepriv->state = FESTATE_ERROR;
 422                 return fe_set_err;
 423         }
 424
 425         c->frequency = original_frequency;
 426         c->inversion = original_inversion;
 427
 428         fepriv->auto_sub_step++;
 429         return 0;
 430 }
 431
 432 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 433 {
 434         enum fe_status s = 0;
 435         int retval = 0;
 436         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 437         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 438
 439         /* if we've got no parameters, just keep idling */
 440         if (fepriv->state & FESTATE_IDLE) {
 441                 fepriv->delay = 3*HZ;
 442                 fepriv->quality = 0;
 443                 return;
 444         }
 445
 446         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 447         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 448                 if (fepriv->state & FESTATE_RETUNE) {
 449                         tmp = *c;
 450                         if (fe->ops.set_frontend)
 451                                 retval = fe->ops.set_frontend(fe);
 452                         *c = tmp;
 453                         if (retval < 0)
 454                                 fepriv->state = FESTATE_ERROR;
 455                         else
 456                                 fepriv->state = FESTATE_TUNED;
 457                 }
 458                 fepriv->delay = 3*HZ;
 459                 fepriv->quality = 0;
 460                 return;
 461         }
 462
 463         /* get the frontend status */
 464         if (fepriv->state & FESTATE_RETUNE) {
 465                 s = 0;
 466         } else {
 467                 if (fe->ops.read_status)
 468                         fe->ops.read_status(fe, &s);
 469                 if (s != fepriv->status) {
 470                         dvb_frontend_add_event(fe, s);
 471                         fepriv->status = s;
 472                 }
 473         }
 474
 475         /* if we're not tuned, and we have a lock, move to the TUNED state */
 476         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 477                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 478                 fepriv->state = FESTATE_TUNED;
 479
 480                 /* if we're tuned, then we have determined the correct inversion */
 481                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 482                     (c->inversion == INVERSION_AUTO)) {
 483                         c->inversion = fepriv->inversion;
 484                 }
 485                 return;
 486         }
 487
 488         /* if we are tuned already, check we're still locked */
 489         if (fepriv->state & FESTATE_TUNED) {
 490                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 491
 492                 /* we're tuned, and the lock is still good... */
 493                 if (s & FE_HAS_LOCK) {
 494                         return;
 495                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 496                         fepriv->state = FESTATE_ZIGZAG_FAST;
 497                         fepriv->started_auto_step = fepriv->auto_step;
 498                         fepriv->check_wrapped = 0;
 499                 }
 500         }
 501
 502         /* don't actually do anything if we're in the LOSTLOCK state,
 503          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 504         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 505             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 506                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 507                 return;
 508         }
 509
 510         /* don't do anything if we're in the DISEQC state, since this
 511          * might be someone with a motorized dish controlled by DISEQC.
 512          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 513         if (fepriv->state & FESTATE_DISEQC) {
 514                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 515                 return;
 516         }
 517
 518         /* if we're in the RETUNE state, set everything up for a brand
 519          * new scan, keeping the current inversion setting, as the next
 520          * tune is _very_ likely to require the same */
 521         if (fepriv->state & FESTATE_RETUNE) {
 522                 fepriv->lnb_drift = 0;
 523                 fepriv->auto_step = 0;
 524                 fepriv->auto_sub_step = 0;
 525                 fepriv->started_auto_step = 0;
 526                 fepriv->check_wrapped = 0;
 527         }
 528
 529         /* fast zigzag. */
 530         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 531                 fepriv->delay = fepriv->min_delay;
 532
 533                 /* perform a tune */
 534                 retval = dvb_frontend_swzigzag_autotune(fe,
 535                                                         fepriv->check_wrapped);
 536                 if (retval < 0) {
 537                         return;
 538                 } else if (retval) {
 539                         /* OK, if we've run out of trials at the fast speed.
 540                          * Drop back to slow for the _next_ attempt */
 541                         fepriv->state = FESTATE_SEARCHING_SLOW;
 542                         fepriv->started_auto_step = fepriv->auto_step;
 543                         return;
 544                 }
 545                 fepriv->check_wrapped = 1;
 546
 547                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 548                  * This ensures we cannot return from an
 549                  * FE_SET_FRONTEND ioctl before the first frontend tune
 550                  * occurs */
 551                 if (fepriv->state & FESTATE_RETUNE) {
 552                         fepriv->state = FESTATE_TUNING_FAST;
 553                 }
 554         }
 555
 556         /* slow zigzag */
 557         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 558                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 559
 560                 /* Note: don't bother checking for wrapping; we stay in this
 561                  * state until we get a lock */
 562                 dvb_frontend_swzigzag_autotune(fe, 0);
 563         }
 564 }
 565
 566 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 567 {
 568         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 569
 570         if (fe->exit != DVB_FE_NO_EXIT)
 571                 return 1;
 572
 573         if (fepriv->dvbdev->writers == 1)
 574                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 575                                   dvb_shutdown_timeout * HZ))
 576                         return 1;
 577
 578         return 0;
 579 }
 580
 581 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 582 {
 583         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 584
 585         if (fepriv->wakeup) {
 586                 fepriv->wakeup = 0;
 587                 return 1;
 588         }
 589         return dvb_frontend_is_exiting(fe);
 590 }
 591
 592 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 593 {
 594         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 595
 596         fepriv->wakeup = 1;
 597         wake_up_interruptible(&fepriv->wait_queue);
 598 }
 599
 600 /**
 601  * dvb_enable_media_tuner() - tries to enable the DVB tuner
 602  *
 603  * @fe:         struct dvb_frontend pointer
 604  *
 605  * This function ensures that just one media tuner is enabled for a given
 606  * frontend. It has two different behaviors:
 607  * - For trivial devices with just one tuner:
 608  *   it just enables the existing tuner->fe link
 609  * - For devices with more than one tuner:
 610  *   It is up to the driver to implement the logic that will enable one tuner
 611  *   and disable the other ones. However, if more than one tuner is enabled for
 612  *   the same frontend, it will print an error message and return -EINVAL.
 613  *
 614  * At return, it will return the error code returned by media_entity_setup_link,
 615  * or 0 if everything is OK, if no tuner is linked to the frontend or if the
 616  * mdev is NULL.
 617  */
 618 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 619 static int dvb_enable_media_tuner(struct dvb_frontend *fe)
 620 {
 621         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 622         struct dvb_adapter *adapter = fe->dvb;
 623         struct media_device *mdev = adapter->mdev;
 624         struct media_entity  *entity, *source;
 625         struct media_link *link, *found_link = NULL;
 626         int i, ret, n_links = 0, active_links = 0;
 627
 628         fepriv->pipe_start_entity = NULL;
 629
 630         if (!mdev)
 631                 return 0;
 632
 633         entity = fepriv->dvbdev->entity;
 634         fepriv->pipe_start_entity = entity;
 635
 636         for (i = 0; i < entity->num_links; i++) {
 637                 link = &entity->links[i];
 638                 if (link->sink->entity == entity) {
 639                         found_link = link;
 640                         n_links++;
 641                         if (link->flags & MEDIA_LNK_FL_ENABLED)
 642                                 active_links++;
 643                 }
 644         }
 645
 646         if (!n_links || active_links == 1 || !found_link)
 647                 return 0;
 648
 649         /*
 650          * If a frontend has more than one tuner linked, it is up to the driver
 651          * to select with one will be the active one, as the frontend core can't
 652          * guess. If the driver doesn't do that, it is a bug.
 653          */
 654         if (n_links > 1 && active_links != 1) {
 655                 dev_err(fe->dvb->device,
 656                         "WARNING: there are %d active links among %d tuners. This is a driver's bug!\n",
 657                         active_links, n_links);
 658                 return -EINVAL;
 659         }
 660
 661         source = found_link->source->entity;
 662         fepriv->pipe_start_entity = source;
 663         for (i = 0; i < source->num_links; i++) {
 664                 struct media_entity *sink;
 665                 int flags = 0;
 666
 667                 link = &source->links[i];
 668                 sink = link->sink->entity;
 669
 670                 if (sink == entity)
 671                         flags = MEDIA_LNK_FL_ENABLED;
 672
 673                 ret = media_entity_setup_link(link, flags);
 674                 if (ret) {
 675                         dev_err(fe->dvb->device,
 676                                 "Couldn't change link %s->%s to %s. Error %d\n",
 677                                 source->name, sink->name,
 678                                 flags ? "enabled" : "disabled",
 679                                 ret);
 680                         return ret;
 681                 } else
 682                         dev_dbg(fe->dvb->device,
 683                                 "link %s->%s was %s\n",
 684                                 source->name, sink->name,
 685                                 flags ? "ENABLED" : "disabled");
 686         }
 687         return 0;
 688 }
 689 #endif
 690
 691 static int dvb_frontend_thread(void *data)
 692 {
 693         struct dvb_frontend *fe = data;
 694         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 695         enum fe_status s;
 696         enum dvbfe_algo algo;
 697 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 698         int ret;
 699 #endif
 700
 701         bool re_tune = false;
 702         bool semheld = false;
 703
 704         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 705
 706         fepriv->check_wrapped = 0;
 707         fepriv->quality = 0;
 708         fepriv->delay = 3*HZ;
 709         fepriv->status = 0;
 710         fepriv->wakeup = 0;
 711         fepriv->reinitialise = 0;
 712
 713 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 714         ret = dvb_enable_media_tuner(fe);
 715         if (ret) {
 716                 /* FIXME: return an error if it fails */
 717                 dev_info(fe->dvb->device,
 718                         "proceeding with FE task\n");
 719         } else if (fepriv->pipe_start_entity) {
 720                 ret = media_entity_pipeline_start(fepriv->pipe_start_entity,
 721                                                   &fepriv->pipe);
 722                 if (ret)
 723                         return ret;
 724         }
 725 #endif
 726
 727         dvb_frontend_init(fe);
 728
 729         set_freezable();
 730         while (1) {
 731                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 732 restart:
 733                 wait_event_interruptible_timeout(fepriv->wait_queue,
 734                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 735                                 || freezing(current),
 736                         fepriv->delay);
 737
 738                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 739                         /* got signal or quitting */
 740                         if (!down_interruptible(&fepriv->sem))
 741                                 semheld = true;
 742                         fe->exit = DVB_FE_NORMAL_EXIT;
 743                         break;
 744                 }
 745
 746                 if (try_to_freeze())
 747                         goto restart;
 748
 749                 if (down_interruptible(&fepriv->sem))
 750                         break;
 751
 752                 if (fepriv->reinitialise) {
 753                         dvb_frontend_init(fe);
 754                         if (fe->ops.set_tone && fepriv->tone != -1)
 755                                 fe->ops.set_tone(fe, fepriv->tone);
 756                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 757                                 fe->ops.set_voltage(fe, fepriv->voltage);
 758                         fepriv->reinitialise = 0;
 759                 }
 760
 761                 /* do an iteration of the tuning loop */
 762                 if (fe->ops.get_frontend_algo) {
 763                         algo = fe->ops.get_frontend_algo(fe);
 764                         switch (algo) {
 765                         case DVBFE_ALGO_HW:
 766                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 767
 768                                 if (fepriv->state & FESTATE_RETUNE) {
 769                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 770                                         re_tune = true;
 771                                         fepriv->state = FESTATE_TUNED;
 772                                 } else {
 773                                         re_tune = false;
 774                                 }
 775
 776                                 if (fe->ops.tune)
 777                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 778
 779                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 780                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 781                                         dvb_frontend_add_event(fe, s);
 782                                         fepriv->status = s;
 783                                 }
 784                                 break;
 785                         case DVBFE_ALGO_SW:
 786                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 787                                 dvb_frontend_swzigzag(fe);
 788                                 break;
 789                         case DVBFE_ALGO_CUSTOM:
 790                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 791                                 if (fepriv->state & FESTATE_RETUNE) {
 792                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 793                                         fepriv->state = FESTATE_TUNED;
 794                                 }
 795                                 /* Case where we are going to search for a carrier
 796                                  * User asked us to retune again for some reason, possibly
 797                                  * requesting a search with a new set of parameters
 798                                  */
 799                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 800                                         if (fe->ops.search) {
 801                                                 fepriv->algo_status = fe->ops.search(fe);
 802                                                 /* We did do a search as was requested, the flags are
 803                                                  * now unset as well and has the flags wrt to search.
 804                                                  */
 805                                         } else {
 806                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 807                                         }
 808                                 }
 809                                 /* Track the carrier if the search was successful */
 810                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 811                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 812                                         fepriv->delay = HZ / 2;
 813                                 }
 814                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
 815                                 fe->ops.read_status(fe, &s);
 816                                 if (s != fepriv->status) {
 817                                         dvb_frontend_add_event(fe, s); /* update event list */
 818                                         fepriv->status = s;
 819                                         if (!(s & FE_HAS_LOCK)) {
 820                                                 fepriv->delay = HZ / 10;
 821                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 822                                         } else {
 823                                                 fepriv->delay = 60 * HZ;
 824                                         }
 825                                 }
 826                                 break;
 827                         default:
 828                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 829                                 break;
 830                         }
 831                 } else {
 832                         dvb_frontend_swzigzag(fe);
 833                 }
 834         }
 835
 836 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 837         if (fepriv->pipe_start_entity)
 838                 media_entity_pipeline_stop(fepriv->pipe_start_entity);
 839         fepriv->pipe_start_entity = NULL;
 840 #endif
 841
 842         if (dvb_powerdown_on_sleep) {
 843                 if (fe->ops.set_voltage)
 844                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 845                 if (fe->ops.tuner_ops.sleep) {
 846                         if (fe->ops.i2c_gate_ctrl)
 847                                 fe->ops.i2c_gate_ctrl(fe, 1);
 848                         fe->ops.tuner_ops.sleep(fe);
 849                         if (fe->ops.i2c_gate_ctrl)
 850                                 fe->ops.i2c_gate_ctrl(fe, 0);
 851                 }
 852                 if (fe->ops.sleep)
 853                         fe->ops.sleep(fe);
 854         }
 855
 856         fepriv->thread = NULL;
 857         if (kthread_should_stop())
 858                 fe->exit = DVB_FE_DEVICE_REMOVED;
 859         else
 860                 fe->exit = DVB_FE_NO_EXIT;
 861         mb();
 862
 863         if (semheld)
 864                 up(&fepriv->sem);
 865         dvb_frontend_wakeup(fe);
 866         return 0;
 867 }
 868
 869 static void dvb_frontend_stop(struct dvb_frontend *fe)
 870 {
 871         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 872
 873         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 874
 875         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 876                 fe->exit = DVB_FE_NORMAL_EXIT;
 877         mb();
 878
 879         if (!fepriv->thread)
 880                 return;
 881
 882         kthread_stop(fepriv->thread);
 883
 884         sema_init(&fepriv->sem, 1);
 885         fepriv->state = FESTATE_IDLE;
 886
 887         /* paranoia check in case a signal arrived */
 888         if (fepriv->thread)
 889                 dev_warn(fe->dvb->device,
 890                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 891                                 fepriv->thread);
 892 }
 893
 894 /*
 895  * Sleep until gettimeofday() > waketime + add_usec
 896  * This needs to be as precise as possible, but as the delay is
 897  * usually between 2ms and 32ms, it is done using a scheduled msleep
 898  * followed by usleep (normally a busy-wait loop) for the remainder
 899  */
 900 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
 901 {
 902         s32 delta, newdelta;
 903
 904         ktime_add_us(*waketime, add_usec);
 905         delta = ktime_us_delta(ktime_get_real(), *waketime);
 906         if (delta > 2500) {
 907                 msleep((delta - 1500) / 1000);
 908                 newdelta = ktime_us_delta(ktime_get_real(), *waketime);
 909                 delta = (newdelta > delta) ? 0 : newdelta;
 910         }
 911         if (delta > 0)
 912                 udelay(delta);
 913 }
 914 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 915
 916 static int dvb_frontend_start(struct dvb_frontend *fe)
 917 {
 918         int ret;
 919         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 920         struct task_struct *fe_thread;
 921
 922         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 923
 924         if (fepriv->thread) {
 925                 if (fe->exit == DVB_FE_NO_EXIT)
 926                         return 0;
 927                 else
 928                         dvb_frontend_stop (fe);
 929         }
 930
 931         if (signal_pending(current))
 932                 return -EINTR;
 933         if (down_interruptible (&fepriv->sem))
 934                 return -EINTR;
 935
 936         fepriv->state = FESTATE_IDLE;
 937         fe->exit = DVB_FE_NO_EXIT;
 938         fepriv->thread = NULL;
 939         mb();
 940
 941         fe_thread = kthread_run(dvb_frontend_thread, fe,
 942                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 943         if (IS_ERR(fe_thread)) {
 944                 ret = PTR_ERR(fe_thread);
 945                 dev_warn(fe->dvb->device,
 946                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 947                                 ret);
 948                 up(&fepriv->sem);
 949                 return ret;
 950         }
 951         fepriv->thread = fe_thread;
 952         return 0;
 953 }
 954
 955 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 956                                         u32 *freq_min, u32 *freq_max)
 957 {
 958         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 959
 960         if (fe->ops.info.frequency_max == 0)
 961                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 962         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 963                 *freq_max = fe->ops.info.frequency_max;
 964         else
 965                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 966
 967         if (*freq_min == 0 || *freq_max == 0)
 968                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 969                                 fe->dvb->num, fe->id);
 970 }
 971
 972 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 973 {
 974         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 975         u32 freq_min;
 976         u32 freq_max;
 977
 978         /* range check: frequency */
 979         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 980         if ((freq_min && c->frequency < freq_min) ||
 981             (freq_max && c->frequency > freq_max)) {
 982                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 983                                 fe->dvb->num, fe->id, c->frequency,
 984                                 freq_min, freq_max);
 985                 return -EINVAL;
 986         }
 987
 988         /* range check: symbol rate */
 989         switch (c->delivery_system) {
 990         case SYS_DVBS:
 991         case SYS_DVBS2:
 992         case SYS_TURBO:
 993         case SYS_DVBC_ANNEX_A:
 994         case SYS_DVBC_ANNEX_C:
 995                 if ((fe->ops.info.symbol_rate_min &&
 996                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 997                     (fe->ops.info.symbol_rate_max &&
 998                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 999                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
1000                                         fe->dvb->num, fe->id, c->symbol_rate,
1001                                         fe->ops.info.symbol_rate_min,
1002                                         fe->ops.info.symbol_rate_max);
1003                         return -EINVAL;
1004                 }
1005         default:
1006                 break;
1007         }
1008
1009         return 0;
1010 }
1011
1012 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
1013 {
1014         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1015         int i;
1016         u32 delsys;
1017
1018         delsys = c->delivery_system;
1019         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
1020         c->delivery_system = delsys;
1021
1022         c->state = DTV_CLEAR;
1023
1024         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1025                         __func__, c->delivery_system);
1026
1027         c->transmission_mode = TRANSMISSION_MODE_AUTO;
1028         c->bandwidth_hz = 0;    /* AUTO */
1029         c->guard_interval = GUARD_INTERVAL_AUTO;
1030         c->hierarchy = HIERARCHY_AUTO;
1031         c->symbol_rate = 0;
1032         c->code_rate_HP = FEC_AUTO;
1033         c->code_rate_LP = FEC_AUTO;
1034         c->fec_inner = FEC_AUTO;
1035         c->rolloff = ROLLOFF_AUTO;
1036         c->voltage = SEC_VOLTAGE_OFF;
1037         c->sectone = SEC_TONE_OFF;
1038         c->pilot = PILOT_AUTO;
1039
1040         c->isdbt_partial_reception = 0;
1041         c->isdbt_sb_mode = 0;
1042         c->isdbt_sb_subchannel = 0;
1043         c->isdbt_sb_segment_idx = 0;
1044         c->isdbt_sb_segment_count = 0;
1045         c->isdbt_layer_enabled = 0;
1046         for (i = 0; i < 3; i++) {
1047                 c->layer[i].fec = FEC_AUTO;
1048                 c->layer[i].modulation = QAM_AUTO;
1049                 c->layer[i].interleaving = 0;
1050                 c->layer[i].segment_count = 0;
1051         }
1052
1053         c->stream_id = NO_STREAM_ID_FILTER;
1054
1055         switch (c->delivery_system) {
1056         case SYS_DVBS:
1057         case SYS_DVBS2:
1058         case SYS_TURBO:
1059                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1060                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1061                 break;
1062         case SYS_ATSC:
1063                 c->modulation = VSB_8;
1064                 break;
1065         case SYS_ISDBS:
1066                 c->symbol_rate = 28860000;
1067                 c->rolloff = ROLLOFF_35;
1068                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1069                 break;
1070         default:
1071                 c->modulation = QAM_AUTO;
1072                 break;
1073         }
1074
1075         c->lna = LNA_AUTO;
1076
1077         return 0;
1078 }
1079
1080 #define _DTV_CMD(n, s, b) \
1081 [n] = { \
1082         .name = #n, \
1083         .cmd  = n, \
1084         .set  = s,\
1085         .buffer = b \
1086 }
1087
1088 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1089         _DTV_CMD(DTV_TUNE, 1, 0),
1090         _DTV_CMD(DTV_CLEAR, 1, 0),
1091
1092         /* Set */
1093         _DTV_CMD(DTV_FREQUENCY, 1, 0),
1094         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1095         _DTV_CMD(DTV_MODULATION, 1, 0),
1096         _DTV_CMD(DTV_INVERSION, 1, 0),
1097         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1098         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1099         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1100         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1101         _DTV_CMD(DTV_TONE, 1, 0),
1102         _DTV_CMD(DTV_PILOT, 1, 0),
1103         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1104         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1105         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1106         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1107         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1108         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1109         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1110         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1111
1112         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1113         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1114         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1115         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1116         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1117         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1118         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1119         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1120         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1121         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1122         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1123         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1124         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1125         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1126         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1127         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1128         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1129         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1130
1131         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1132         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1133         _DTV_CMD(DTV_LNA, 1, 0),
1134
1135         /* Get */
1136         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1137         _DTV_CMD(DTV_API_VERSION, 0, 0),
1138
1139         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1140
1141         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1142         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1143
1144         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1145         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1146         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1147         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1148         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1149         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1150         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1151         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1152         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1153         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1154         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1155         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1156         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1157
1158         /* Statistics API */
1159         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1160         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1161         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1162         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1163         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1164         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1165         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1166         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1167 };
1168
1169 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1170 {
1171         int i;
1172
1173         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1174                 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1175                                 __func__, tvp->cmd);
1176                 return;
1177         }
1178
1179         dev_dbg(fe->dvb->device, "%s: tvp.cmd    = 0x%08x (%s)\n", __func__,
1180                         tvp->cmd, dtv_cmds[tvp->cmd].name);
1181
1182         if (dtv_cmds[tvp->cmd].buffer) {
1183                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1184                         __func__, tvp->u.buffer.len);
1185
1186                 for(i = 0; i < tvp->u.buffer.len; i++)
1187                         dev_dbg(fe->dvb->device,
1188                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1189                                         __func__, i, tvp->u.buffer.data[i]);
1190         } else {
1191                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1192                                 tvp->u.data);
1193         }
1194 }
1195
1196 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1197  * drivers can use a single set_frontend tuning function, regardless of whether
1198  * it's being used for the legacy or new API, reducing code and complexity.
1199  */
1200 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1201                                    struct dtv_frontend_properties *c,
1202                                    const struct dvb_frontend_parameters *p)
1203 {
1204         c->frequency = p->frequency;
1205         c->inversion = p->inversion;
1206
1207         switch (dvbv3_type(c->delivery_system)) {
1208         case DVBV3_QPSK:
1209                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1210                 c->symbol_rate = p->u.qpsk.symbol_rate;
1211                 c->fec_inner = p->u.qpsk.fec_inner;
1212                 break;
1213         case DVBV3_QAM:
1214                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1215                 c->symbol_rate = p->u.qam.symbol_rate;
1216                 c->fec_inner = p->u.qam.fec_inner;
1217                 c->modulation = p->u.qam.modulation;
1218                 break;
1219         case DVBV3_OFDM:
1220                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1221
1222                 switch (p->u.ofdm.bandwidth) {
1223                 case BANDWIDTH_10_MHZ:
1224                         c->bandwidth_hz = 10000000;
1225                         break;
1226                 case BANDWIDTH_8_MHZ:
1227                         c->bandwidth_hz = 8000000;
1228                         break;
1229                 case BANDWIDTH_7_MHZ:
1230                         c->bandwidth_hz = 7000000;
1231                         break;
1232                 case BANDWIDTH_6_MHZ:
1233                         c->bandwidth_hz = 6000000;
1234                         break;
1235                 case BANDWIDTH_5_MHZ:
1236                         c->bandwidth_hz = 5000000;
1237                         break;
1238                 case BANDWIDTH_1_712_MHZ:
1239                         c->bandwidth_hz = 1712000;
1240                         break;
1241                 case BANDWIDTH_AUTO:
1242                         c->bandwidth_hz = 0;
1243                 }
1244
1245                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1246                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1247                 c->modulation = p->u.ofdm.constellation;
1248                 c->transmission_mode = p->u.ofdm.transmission_mode;
1249                 c->guard_interval = p->u.ofdm.guard_interval;
1250                 c->hierarchy = p->u.ofdm.hierarchy_information;
1251                 break;
1252         case DVBV3_ATSC:
1253                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1254                 c->modulation = p->u.vsb.modulation;
1255                 if (c->delivery_system == SYS_ATSCMH)
1256                         break;
1257                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1258                         c->delivery_system = SYS_ATSC;
1259                 else
1260                         c->delivery_system = SYS_DVBC_ANNEX_B;
1261                 break;
1262         case DVBV3_UNKNOWN:
1263                 dev_err(fe->dvb->device,
1264                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1265                                 __func__, c->delivery_system);
1266                 return -EINVAL;
1267         }
1268
1269         return 0;
1270 }
1271
1272 /* Ensure the cached values are set correctly in the frontend
1273  * legacy tuning structures, for the advanced tuning API.
1274  */
1275 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1276                                             struct dvb_frontend_parameters *p)
1277 {
1278         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1279
1280         p->frequency = c->frequency;
1281         p->inversion = c->inversion;
1282
1283         switch (dvbv3_type(c->delivery_system)) {
1284         case DVBV3_UNKNOWN:
1285                 dev_err(fe->dvb->device,
1286                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1287                                 __func__, c->delivery_system);
1288                 return -EINVAL;
1289         case DVBV3_QPSK:
1290                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1291                 p->u.qpsk.symbol_rate = c->symbol_rate;
1292                 p->u.qpsk.fec_inner = c->fec_inner;
1293                 break;
1294         case DVBV3_QAM:
1295                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1296                 p->u.qam.symbol_rate = c->symbol_rate;
1297                 p->u.qam.fec_inner = c->fec_inner;
1298                 p->u.qam.modulation = c->modulation;
1299                 break;
1300         case DVBV3_OFDM:
1301                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1302                 switch (c->bandwidth_hz) {
1303                 case 10000000:
1304                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1305                         break;
1306                 case 8000000:
1307                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1308                         break;
1309                 case 7000000:
1310                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1311                         break;
1312                 case 6000000:
1313                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1314                         break;
1315                 case 5000000:
1316                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1317                         break;
1318                 case 1712000:
1319                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1320                         break;
1321                 case 0:
1322                 default:
1323                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1324                 }
1325                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1326                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1327                 p->u.ofdm.constellation = c->modulation;
1328                 p->u.ofdm.transmission_mode = c->transmission_mode;
1329                 p->u.ofdm.guard_interval = c->guard_interval;
1330                 p->u.ofdm.hierarchy_information = c->hierarchy;
1331                 break;
1332         case DVBV3_ATSC:
1333                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1334                 p->u.vsb.modulation = c->modulation;
1335                 break;
1336         }
1337         return 0;
1338 }
1339
1340 /**
1341  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1342  * @fe:         struct dvb_frontend pointer
1343  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1344  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1345  *
1346  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1347  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1348  * If p_out is not null, it will update the DVBv3 params pointed by it.
1349  */
1350 static int dtv_get_frontend(struct dvb_frontend *fe,
1351                             struct dvb_frontend_parameters *p_out)
1352 {
1353         int r;
1354
1355         if (fe->ops.get_frontend) {
1356                 r = fe->ops.get_frontend(fe);
1357                 if (unlikely(r < 0))
1358                         return r;
1359                 if (p_out)
1360                         dtv_property_legacy_params_sync(fe, p_out);
1361                 return 0;
1362         }
1363
1364         /* As everything is in cache, get_frontend fops are always supported */
1365         return 0;
1366 }
1367
1368 static int dvb_frontend_ioctl_legacy(struct file *file,
1369                         unsigned int cmd, void *parg);
1370 static int dvb_frontend_ioctl_properties(struct file *file,
1371                         unsigned int cmd, void *parg);
1372
1373 static int dtv_property_process_get(struct dvb_frontend *fe,
1374                                     const struct dtv_frontend_properties *c,
1375                                     struct dtv_property *tvp,
1376                                     struct file *file)
1377 {
1378         int r, ncaps;
1379
1380         switch(tvp->cmd) {
1381         case DTV_ENUM_DELSYS:
1382                 ncaps = 0;
1383                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1384                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1385                         ncaps++;
1386                 }
1387                 tvp->u.buffer.len = ncaps;
1388                 break;
1389         case DTV_FREQUENCY:
1390                 tvp->u.data = c->frequency;
1391                 break;
1392         case DTV_MODULATION:
1393                 tvp->u.data = c->modulation;
1394                 break;
1395         case DTV_BANDWIDTH_HZ:
1396                 tvp->u.data = c->bandwidth_hz;
1397                 break;
1398         case DTV_INVERSION:
1399                 tvp->u.data = c->inversion;
1400                 break;
1401         case DTV_SYMBOL_RATE:
1402                 tvp->u.data = c->symbol_rate;
1403                 break;
1404         case DTV_INNER_FEC:
1405                 tvp->u.data = c->fec_inner;
1406                 break;
1407         case DTV_PILOT:
1408                 tvp->u.data = c->pilot;
1409                 break;
1410         case DTV_ROLLOFF:
1411                 tvp->u.data = c->rolloff;
1412                 break;
1413         case DTV_DELIVERY_SYSTEM:
1414                 tvp->u.data = c->delivery_system;
1415                 break;
1416         case DTV_VOLTAGE:
1417                 tvp->u.data = c->voltage;
1418                 break;
1419         case DTV_TONE:
1420                 tvp->u.data = c->sectone;
1421                 break;
1422         case DTV_API_VERSION:
1423                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1424                 break;
1425         case DTV_CODE_RATE_HP:
1426                 tvp->u.data = c->code_rate_HP;
1427                 break;
1428         case DTV_CODE_RATE_LP:
1429                 tvp->u.data = c->code_rate_LP;
1430                 break;
1431         case DTV_GUARD_INTERVAL:
1432                 tvp->u.data = c->guard_interval;
1433                 break;
1434         case DTV_TRANSMISSION_MODE:
1435                 tvp->u.data = c->transmission_mode;
1436                 break;
1437         case DTV_HIERARCHY:
1438                 tvp->u.data = c->hierarchy;
1439                 break;
1440         case DTV_INTERLEAVING:
1441                 tvp->u.data = c->interleaving;
1442                 break;
1443
1444         /* ISDB-T Support here */
1445         case DTV_ISDBT_PARTIAL_RECEPTION:
1446                 tvp->u.data = c->isdbt_partial_reception;
1447                 break;
1448         case DTV_ISDBT_SOUND_BROADCASTING:
1449                 tvp->u.data = c->isdbt_sb_mode;
1450                 break;
1451         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1452                 tvp->u.data = c->isdbt_sb_subchannel;
1453                 break;
1454         case DTV_ISDBT_SB_SEGMENT_IDX:
1455                 tvp->u.data = c->isdbt_sb_segment_idx;
1456                 break;
1457         case DTV_ISDBT_SB_SEGMENT_COUNT:
1458                 tvp->u.data = c->isdbt_sb_segment_count;
1459                 break;
1460         case DTV_ISDBT_LAYER_ENABLED:
1461                 tvp->u.data = c->isdbt_layer_enabled;
1462                 break;
1463         case DTV_ISDBT_LAYERA_FEC:
1464                 tvp->u.data = c->layer[0].fec;
1465                 break;
1466         case DTV_ISDBT_LAYERA_MODULATION:
1467                 tvp->u.data = c->layer[0].modulation;
1468                 break;
1469         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1470                 tvp->u.data = c->layer[0].segment_count;
1471                 break;
1472         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1473                 tvp->u.data = c->layer[0].interleaving;
1474                 break;
1475         case DTV_ISDBT_LAYERB_FEC:
1476                 tvp->u.data = c->layer[1].fec;
1477                 break;
1478         case DTV_ISDBT_LAYERB_MODULATION:
1479                 tvp->u.data = c->layer[1].modulation;
1480                 break;
1481         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1482                 tvp->u.data = c->layer[1].segment_count;
1483                 break;
1484         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1485                 tvp->u.data = c->layer[1].interleaving;
1486                 break;
1487         case DTV_ISDBT_LAYERC_FEC:
1488                 tvp->u.data = c->layer[2].fec;
1489                 break;
1490         case DTV_ISDBT_LAYERC_MODULATION:
1491                 tvp->u.data = c->layer[2].modulation;
1492                 break;
1493         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1494                 tvp->u.data = c->layer[2].segment_count;
1495                 break;
1496         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1497                 tvp->u.data = c->layer[2].interleaving;
1498                 break;
1499
1500         /* Multistream support */
1501         case DTV_STREAM_ID:
1502         case DTV_DVBT2_PLP_ID_LEGACY:
1503                 tvp->u.data = c->stream_id;
1504                 break;
1505
1506         /* ATSC-MH */
1507         case DTV_ATSCMH_FIC_VER:
1508                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1509                 break;
1510         case DTV_ATSCMH_PARADE_ID:
1511                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1512                 break;
1513         case DTV_ATSCMH_NOG:
1514                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1515                 break;
1516         case DTV_ATSCMH_TNOG:
1517                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1518                 break;
1519         case DTV_ATSCMH_SGN:
1520                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1521                 break;
1522         case DTV_ATSCMH_PRC:
1523                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1524                 break;
1525         case DTV_ATSCMH_RS_FRAME_MODE:
1526                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1527                 break;
1528         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1529                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1530                 break;
1531         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1532                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1533                 break;
1534         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1535                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1536                 break;
1537         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1538                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1539                 break;
1540         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1541                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1542                 break;
1543         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1544                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1545                 break;
1546         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1547                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1548                 break;
1549         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1550                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1551                 break;
1552
1553         case DTV_LNA:
1554                 tvp->u.data = c->lna;
1555                 break;
1556
1557         /* Fill quality measures */
1558         case DTV_STAT_SIGNAL_STRENGTH:
1559                 tvp->u.st = c->strength;
1560                 break;
1561         case DTV_STAT_CNR:
1562                 tvp->u.st = c->cnr;
1563                 break;
1564         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1565                 tvp->u.st = c->pre_bit_error;
1566                 break;
1567         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1568                 tvp->u.st = c->pre_bit_count;
1569                 break;
1570         case DTV_STAT_POST_ERROR_BIT_COUNT:
1571                 tvp->u.st = c->post_bit_error;
1572                 break;
1573         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1574                 tvp->u.st = c->post_bit_count;
1575                 break;
1576         case DTV_STAT_ERROR_BLOCK_COUNT:
1577                 tvp->u.st = c->block_error;
1578                 break;
1579         case DTV_STAT_TOTAL_BLOCK_COUNT:
1580                 tvp->u.st = c->block_count;
1581                 break;
1582         default:
1583                 dev_dbg(fe->dvb->device,
1584                         "%s: FE property %d doesn't exist\n",
1585                         __func__, tvp->cmd);
1586                 return -EINVAL;
1587         }
1588
1589         /* Allow the frontend to override outgoing properties */
1590         if (fe->ops.get_property) {
1591                 r = fe->ops.get_property(fe, tvp);
1592                 if (r < 0)
1593                         return r;
1594         }
1595
1596         dtv_property_dump(fe, tvp);
1597
1598         return 0;
1599 }
1600
1601 static int dtv_set_frontend(struct dvb_frontend *fe);
1602
1603 static bool is_dvbv3_delsys(u32 delsys)
1604 {
1605         bool status;
1606
1607         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1608                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1609
1610         return status;
1611 }
1612
1613 /**
1614  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1615  * @fe:                 struct frontend;
1616  * @delsys:                     DVBv5 type that will be used for emulation
1617  *
1618  * Provides emulation for delivery systems that are compatible with the old
1619  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1620  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1621  * parameters are compatible with DVB-S spec.
1622  */
1623 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1624 {
1625         int i;
1626         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1627
1628         c->delivery_system = delsys;
1629
1630         /*
1631          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1632          */
1633         if (c->delivery_system == SYS_ISDBT) {
1634                 dev_dbg(fe->dvb->device,
1635                         "%s: Using defaults for SYS_ISDBT\n",
1636                         __func__);
1637
1638                 if (!c->bandwidth_hz)
1639                         c->bandwidth_hz = 6000000;
1640
1641                 c->isdbt_partial_reception = 0;
1642                 c->isdbt_sb_mode = 0;
1643                 c->isdbt_sb_subchannel = 0;
1644                 c->isdbt_sb_segment_idx = 0;
1645                 c->isdbt_sb_segment_count = 0;
1646                 c->isdbt_layer_enabled = 7;
1647                 for (i = 0; i < 3; i++) {
1648                         c->layer[i].fec = FEC_AUTO;
1649                         c->layer[i].modulation = QAM_AUTO;
1650                         c->layer[i].interleaving = 0;
1651                         c->layer[i].segment_count = 0;
1652                 }
1653         }
1654         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1655                 __func__, c->delivery_system);
1656
1657         return 0;
1658 }
1659
1660 /**
1661  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1662  * @fe:                 frontend struct
1663  * @desired_system:     delivery system requested by the user
1664  *
1665  * A DVBv5 call know what's the desired system it wants. So, set it.
1666  *
1667  * There are, however, a few known issues with early DVBv5 applications that
1668  * are also handled by this logic:
1669  *
1670  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1671  *    This is an API violation, but, as we don't want to break userspace,
1672  *    convert it to the first supported delivery system.
1673  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1674  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1675  *    ISDB-T provided backward compat with DVB-T.
1676  */
1677 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1678                                      u32 desired_system)
1679 {
1680         int ncaps;
1681         u32 delsys = SYS_UNDEFINED;
1682         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1683         enum dvbv3_emulation_type type;
1684
1685         /*
1686          * It was reported that some old DVBv5 applications were
1687          * filling delivery_system with SYS_UNDEFINED. If this happens,
1688          * assume that the application wants to use the first supported
1689          * delivery system.
1690          */
1691         if (desired_system == SYS_UNDEFINED)
1692                 desired_system = fe->ops.delsys[0];
1693
1694         /*
1695          * This is a DVBv5 call. So, it likely knows the supported
1696          * delivery systems. So, check if the desired delivery system is
1697          * supported
1698          */
1699         ncaps = 0;
1700         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1701                 if (fe->ops.delsys[ncaps] == desired_system) {
1702                         c->delivery_system = desired_system;
1703                         dev_dbg(fe->dvb->device,
1704                                         "%s: Changing delivery system to %d\n",
1705                                         __func__, desired_system);
1706                         return 0;
1707                 }
1708                 ncaps++;
1709         }
1710
1711         /*
1712          * The requested delivery system isn't supported. Maybe userspace
1713          * is requesting a DVBv3 compatible delivery system.
1714          *
1715          * The emulation only works if the desired system is one of the
1716          * delivery systems supported by DVBv3 API
1717          */
1718         if (!is_dvbv3_delsys(desired_system)) {
1719                 dev_dbg(fe->dvb->device,
1720                         "%s: Delivery system %d not supported.\n",
1721                         __func__, desired_system);
1722                 return -EINVAL;
1723         }
1724
1725         type = dvbv3_type(desired_system);
1726
1727         /*
1728         * Get the last non-DVBv3 delivery system that has the same type
1729         * of the desired system
1730         */
1731         ncaps = 0;
1732         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1733                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1734                         delsys = fe->ops.delsys[ncaps];
1735                 ncaps++;
1736         }
1737
1738         /* There's nothing compatible with the desired delivery system */
1739         if (delsys == SYS_UNDEFINED) {
1740                 dev_dbg(fe->dvb->device,
1741                         "%s: Delivery system %d not supported on emulation mode.\n",
1742                         __func__, desired_system);
1743                 return -EINVAL;
1744         }
1745
1746         dev_dbg(fe->dvb->device,
1747                 "%s: Using delivery system %d emulated as if it were %d\n",
1748                 __func__, delsys, desired_system);
1749
1750         return emulate_delivery_system(fe, desired_system);
1751 }
1752
1753 /**
1754  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1755  * @fe: frontend struct
1756  *
1757  * A DVBv3 call doesn't know what's the desired system it wants. It also
1758  * doesn't allow to switch between different types. Due to that, userspace
1759  * should use DVBv5 instead.
1760  * However, in order to avoid breaking userspace API, limited backward
1761  * compatibility support is provided.
1762  *
1763  * There are some delivery systems that are incompatible with DVBv3 calls.
1764  *
1765  * This routine should work fine for frontends that support just one delivery
1766  * system.
1767  *
1768  * For frontends that support multiple frontends:
1769  * 1) It defaults to use the first supported delivery system. There's an
1770  *    userspace application that allows changing it at runtime;
1771  *
1772  * 2) If the current delivery system is not compatible with DVBv3, it gets
1773  *    the first one that it is compatible.
1774  *
1775  * NOTE: in order for this to work with applications like Kaffeine that
1776  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1777  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1778  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1779  *      to DVB-S.
1780  */
1781 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1782 {
1783         int ncaps;
1784         u32 delsys = SYS_UNDEFINED;
1785         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1786
1787         /* If not set yet, defaults to the first supported delivery system */
1788         if (c->delivery_system == SYS_UNDEFINED)
1789                 c->delivery_system = fe->ops.delsys[0];
1790
1791         /*
1792          * Trivial case: just use the current one, if it already a DVBv3
1793          * delivery system
1794          */
1795         if (is_dvbv3_delsys(c->delivery_system)) {
1796                 dev_dbg(fe->dvb->device,
1797                                 "%s: Using delivery system to %d\n",
1798                                 __func__, c->delivery_system);
1799                 return 0;
1800         }
1801
1802         /*
1803          * Seek for the first delivery system that it is compatible with a
1804          * DVBv3 standard
1805          */
1806         ncaps = 0;
1807         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1808                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1809                         delsys = fe->ops.delsys[ncaps];
1810                         break;
1811                 }
1812                 ncaps++;
1813         }
1814         if (delsys == SYS_UNDEFINED) {
1815                 dev_dbg(fe->dvb->device,
1816                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1817                         __func__);
1818                 return -EINVAL;
1819         }
1820         return emulate_delivery_system(fe, delsys);
1821 }
1822
1823 static int dtv_property_process_set(struct dvb_frontend *fe,
1824                                     struct dtv_property *tvp,
1825                                     struct file *file)
1826 {
1827         int r = 0;
1828         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1829
1830         /* Allow the frontend to validate incoming properties */
1831         if (fe->ops.set_property) {
1832                 r = fe->ops.set_property(fe, tvp);
1833                 if (r < 0)
1834                         return r;
1835         }
1836
1837         switch(tvp->cmd) {
1838         case DTV_CLEAR:
1839                 /*
1840                  * Reset a cache of data specific to the frontend here. This does
1841                  * not effect hardware.
1842                  */
1843                 dvb_frontend_clear_cache(fe);
1844                 break;
1845         case DTV_TUNE:
1846                 /* interpret the cache of data, build either a traditional frontend
1847                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1848                  * ioctl.
1849                  */
1850                 c->state = tvp->cmd;
1851                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1852                                 __func__);
1853
1854                 r = dtv_set_frontend(fe);
1855                 break;
1856         case DTV_FREQUENCY:
1857                 c->frequency = tvp->u.data;
1858                 break;
1859         case DTV_MODULATION:
1860                 c->modulation = tvp->u.data;
1861                 break;
1862         case DTV_BANDWIDTH_HZ:
1863                 c->bandwidth_hz = tvp->u.data;
1864                 break;
1865         case DTV_INVERSION:
1866                 c->inversion = tvp->u.data;
1867                 break;
1868         case DTV_SYMBOL_RATE:
1869                 c->symbol_rate = tvp->u.data;
1870                 break;
1871         case DTV_INNER_FEC:
1872                 c->fec_inner = tvp->u.data;
1873                 break;
1874         case DTV_PILOT:
1875                 c->pilot = tvp->u.data;
1876                 break;
1877         case DTV_ROLLOFF:
1878                 c->rolloff = tvp->u.data;
1879                 break;
1880         case DTV_DELIVERY_SYSTEM:
1881                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1882                 break;
1883         case DTV_VOLTAGE:
1884                 c->voltage = tvp->u.data;
1885                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1886                         (void *)c->voltage);
1887                 break;
1888         case DTV_TONE:
1889                 c->sectone = tvp->u.data;
1890                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1891                         (void *)c->sectone);
1892                 break;
1893         case DTV_CODE_RATE_HP:
1894                 c->code_rate_HP = tvp->u.data;
1895                 break;
1896         case DTV_CODE_RATE_LP:
1897                 c->code_rate_LP = tvp->u.data;
1898                 break;
1899         case DTV_GUARD_INTERVAL:
1900                 c->guard_interval = tvp->u.data;
1901                 break;
1902         case DTV_TRANSMISSION_MODE:
1903                 c->transmission_mode = tvp->u.data;
1904                 break;
1905         case DTV_HIERARCHY:
1906                 c->hierarchy = tvp->u.data;
1907                 break;
1908         case DTV_INTERLEAVING:
1909                 c->interleaving = tvp->u.data;
1910                 break;
1911
1912         /* ISDB-T Support here */
1913         case DTV_ISDBT_PARTIAL_RECEPTION:
1914                 c->isdbt_partial_reception = tvp->u.data;
1915                 break;
1916         case DTV_ISDBT_SOUND_BROADCASTING:
1917                 c->isdbt_sb_mode = tvp->u.data;
1918                 break;
1919         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1920                 c->isdbt_sb_subchannel = tvp->u.data;
1921                 break;
1922         case DTV_ISDBT_SB_SEGMENT_IDX:
1923                 c->isdbt_sb_segment_idx = tvp->u.data;
1924                 break;
1925         case DTV_ISDBT_SB_SEGMENT_COUNT:
1926                 c->isdbt_sb_segment_count = tvp->u.data;
1927                 break;
1928         case DTV_ISDBT_LAYER_ENABLED:
1929                 c->isdbt_layer_enabled = tvp->u.data;
1930                 break;
1931         case DTV_ISDBT_LAYERA_FEC:
1932                 c->layer[0].fec = tvp->u.data;
1933                 break;
1934         case DTV_ISDBT_LAYERA_MODULATION:
1935                 c->layer[0].modulation = tvp->u.data;
1936                 break;
1937         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1938                 c->layer[0].segment_count = tvp->u.data;
1939                 break;
1940         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1941                 c->layer[0].interleaving = tvp->u.data;
1942                 break;
1943         case DTV_ISDBT_LAYERB_FEC:
1944                 c->layer[1].fec = tvp->u.data;
1945                 break;
1946         case DTV_ISDBT_LAYERB_MODULATION:
1947                 c->layer[1].modulation = tvp->u.data;
1948                 break;
1949         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1950                 c->layer[1].segment_count = tvp->u.data;
1951                 break;
1952         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1953                 c->layer[1].interleaving = tvp->u.data;
1954                 break;
1955         case DTV_ISDBT_LAYERC_FEC:
1956                 c->layer[2].fec = tvp->u.data;
1957                 break;
1958         case DTV_ISDBT_LAYERC_MODULATION:
1959                 c->layer[2].modulation = tvp->u.data;
1960                 break;
1961         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1962                 c->layer[2].segment_count = tvp->u.data;
1963                 break;
1964         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1965                 c->layer[2].interleaving = tvp->u.data;
1966                 break;
1967
1968         /* Multistream support */
1969         case DTV_STREAM_ID:
1970         case DTV_DVBT2_PLP_ID_LEGACY:
1971                 c->stream_id = tvp->u.data;
1972                 break;
1973
1974         /* ATSC-MH */
1975         case DTV_ATSCMH_PARADE_ID:
1976                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1977                 break;
1978         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1979                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1980                 break;
1981
1982         case DTV_LNA:
1983                 c->lna = tvp->u.data;
1984                 if (fe->ops.set_lna)
1985                         r = fe->ops.set_lna(fe);
1986                 if (r < 0)
1987                         c->lna = LNA_AUTO;
1988                 break;
1989
1990         default:
1991                 return -EINVAL;
1992         }
1993
1994         return r;
1995 }
1996
1997 static int dvb_frontend_ioctl(struct file *file,
1998                         unsigned int cmd, void *parg)
1999 {
2000         struct dvb_device *dvbdev = file->private_data;
2001         struct dvb_frontend *fe = dvbdev->priv;
2002         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2003         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2004         int err = -EOPNOTSUPP;
2005
2006         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
2007         if (down_interruptible(&fepriv->sem))
2008                 return -ERESTARTSYS;
2009
2010         if (fe->exit != DVB_FE_NO_EXIT) {
2011                 up(&fepriv->sem);
2012                 return -ENODEV;
2013         }
2014
2015         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
2016             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
2017              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2018                 up(&fepriv->sem);
2019                 return -EPERM;
2020         }
2021
2022         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
2023                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
2024         else {
2025                 c->state = DTV_UNDEFINED;
2026                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
2027         }
2028
2029         up(&fepriv->sem);
2030         return err;
2031 }
2032
2033 static int dvb_frontend_ioctl_properties(struct file *file,
2034                         unsigned int cmd, void *parg)
2035 {
2036         struct dvb_device *dvbdev = file->private_data;
2037         struct dvb_frontend *fe = dvbdev->priv;
2038         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2039         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2040         int err = 0;
2041
2042         struct dtv_properties *tvps = parg;
2043         struct dtv_property *tvp = NULL;
2044         int i;
2045
2046         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2047
2048         if (cmd == FE_SET_PROPERTY) {
2049                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2050                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2051
2052                 /* Put an arbitrary limit on the number of messages that can
2053                  * be sent at once */
2054                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2055                         return -EINVAL;
2056
2057                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2058                 if (!tvp) {
2059                         err = -ENOMEM;
2060                         goto out;
2061                 }
2062
2063                 if (copy_from_user(tvp, (void __user *)tvps->props,
2064                                    tvps->num * sizeof(struct dtv_property))) {
2065                         err = -EFAULT;
2066                         goto out;
2067                 }
2068
2069                 for (i = 0; i < tvps->num; i++) {
2070                         err = dtv_property_process_set(fe, tvp + i, file);
2071                         if (err < 0)
2072                                 goto out;
2073                         (tvp + i)->result = err;
2074                 }
2075
2076                 if (c->state == DTV_TUNE)
2077                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
2078
2079         } else if (cmd == FE_GET_PROPERTY) {
2080                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2081                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2082
2083                 /* Put an arbitrary limit on the number of messages that can
2084                  * be sent at once */
2085                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2086                         return -EINVAL;
2087
2088                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2089                 if (!tvp) {
2090                         err = -ENOMEM;
2091                         goto out;
2092                 }
2093
2094                 if (copy_from_user(tvp, (void __user *)tvps->props,
2095                                    tvps->num * sizeof(struct dtv_property))) {
2096                         err = -EFAULT;
2097                         goto out;
2098                 }
2099
2100                 /*
2101                  * Fills the cache out struct with the cache contents, plus
2102                  * the data retrieved from get_frontend, if the frontend
2103                  * is not idle. Otherwise, returns the cached content
2104                  */
2105                 if (fepriv->state != FESTATE_IDLE) {
2106                         err = dtv_get_frontend(fe, NULL);
2107                         if (err < 0)
2108                                 goto out;
2109                 }
2110                 for (i = 0; i < tvps->num; i++) {
2111                         err = dtv_property_process_get(fe, c, tvp + i, file);
2112                         if (err < 0)
2113                                 goto out;
2114                         (tvp + i)->result = err;
2115                 }
2116
2117                 if (copy_to_user((void __user *)tvps->props, tvp,
2118                                  tvps->num * sizeof(struct dtv_property))) {
2119                         err = -EFAULT;
2120                         goto out;
2121                 }
2122
2123         } else
2124                 err = -EOPNOTSUPP;
2125
2126 out:
2127         kfree(tvp);
2128         return err;
2129 }
2130
2131 static int dtv_set_frontend(struct dvb_frontend *fe)
2132 {
2133         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2134         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2135         struct dvb_frontend_tune_settings fetunesettings;
2136         u32 rolloff = 0;
2137
2138         if (dvb_frontend_check_parameters(fe) < 0)
2139                 return -EINVAL;
2140
2141         /*
2142          * Initialize output parameters to match the values given by
2143          * the user. FE_SET_FRONTEND triggers an initial frontend event
2144          * with status = 0, which copies output parameters to userspace.
2145          */
2146         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2147
2148         /*
2149          * Be sure that the bandwidth will be filled for all
2150          * non-satellite systems, as tuners need to know what
2151          * low pass/Nyquist half filter should be applied, in
2152          * order to avoid inter-channel noise.
2153          *
2154          * ISDB-T and DVB-T/T2 already sets bandwidth.
2155          * ATSC and DVB-C don't set, so, the core should fill it.
2156          *
2157          * On DVB-C Annex A and C, the bandwidth is a function of
2158          * the roll-off and symbol rate. Annex B defines different
2159          * roll-off factors depending on the modulation. Fortunately,
2160          * Annex B is only used with 6MHz, so there's no need to
2161          * calculate it.
2162          *
2163          * While not officially supported, a side effect of handling it at
2164          * the cache level is that a program could retrieve the bandwidth
2165          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2166          */
2167         switch (c->delivery_system) {
2168         case SYS_ATSC:
2169         case SYS_DVBC_ANNEX_B:
2170                 c->bandwidth_hz = 6000000;
2171                 break;
2172         case SYS_DVBC_ANNEX_A:
2173                 rolloff = 115;
2174                 break;
2175         case SYS_DVBC_ANNEX_C:
2176                 rolloff = 113;
2177                 break;
2178         case SYS_DVBS:
2179         case SYS_TURBO:
2180         case SYS_ISDBS:
2181                 rolloff = 135;
2182                 break;
2183         case SYS_DVBS2:
2184                 switch (c->rolloff) {
2185                 case ROLLOFF_20:
2186                         rolloff = 120;
2187                         break;
2188                 case ROLLOFF_25:
2189                         rolloff = 125;
2190                         break;
2191                 default:
2192                 case ROLLOFF_35:
2193                         rolloff = 135;
2194                 }
2195                 break;
2196         default:
2197                 break;
2198         }
2199         if (rolloff)
2200                 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2201
2202         /* force auto frequency inversion if requested */
2203         if (dvb_force_auto_inversion)
2204                 c->inversion = INVERSION_AUTO;
2205
2206         /*
2207          * without hierarchical coding code_rate_LP is irrelevant,
2208          * so we tolerate the otherwise invalid FEC_NONE setting
2209          */
2210         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2211                 c->code_rate_LP = FEC_AUTO;
2212
2213         /* get frontend-specific tuning settings */
2214         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2215         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2216                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2217                 fepriv->max_drift = fetunesettings.max_drift;
2218                 fepriv->step_size = fetunesettings.step_size;
2219         } else {
2220                 /* default values */
2221                 switch (c->delivery_system) {
2222                 case SYS_DVBS:
2223                 case SYS_DVBS2:
2224                 case SYS_ISDBS:
2225                 case SYS_TURBO:
2226                 case SYS_DVBC_ANNEX_A:
2227                 case SYS_DVBC_ANNEX_C:
2228                         fepriv->min_delay = HZ / 20;
2229                         fepriv->step_size = c->symbol_rate / 16000;
2230                         fepriv->max_drift = c->symbol_rate / 2000;
2231                         break;
2232                 case SYS_DVBT:
2233                 case SYS_DVBT2:
2234                 case SYS_ISDBT:
2235                 case SYS_DTMB:
2236                         fepriv->min_delay = HZ / 20;
2237                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2238                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2239                         break;
2240                 default:
2241                         /*
2242                          * FIXME: This sounds wrong! if freqency_stepsize is
2243                          * defined by the frontend, why not use it???
2244                          */
2245                         fepriv->min_delay = HZ / 20;
2246                         fepriv->step_size = 0; /* no zigzag */
2247                         fepriv->max_drift = 0;
2248                         break;
2249                 }
2250         }
2251         if (dvb_override_tune_delay > 0)
2252                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2253
2254         fepriv->state = FESTATE_RETUNE;
2255
2256         /* Request the search algorithm to search */
2257         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2258
2259         dvb_frontend_clear_events(fe);
2260         dvb_frontend_add_event(fe, 0);
2261         dvb_frontend_wakeup(fe);
2262         fepriv->status = 0;
2263
2264         return 0;
2265 }
2266
2267
2268 static int dvb_frontend_ioctl_legacy(struct file *file,
2269                         unsigned int cmd, void *parg)
2270 {
2271         struct dvb_device *dvbdev = file->private_data;
2272         struct dvb_frontend *fe = dvbdev->priv;
2273         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2274         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2275         int err = -EOPNOTSUPP;
2276
2277         switch (cmd) {
2278         case FE_GET_INFO: {
2279                 struct dvb_frontend_info* info = parg;
2280
2281                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2282                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2283
2284                 /*
2285                  * Associate the 4 delivery systems supported by DVBv3
2286                  * API with their DVBv5 counterpart. For the other standards,
2287                  * use the closest type, assuming that it would hopefully
2288                  * work with a DVBv3 application.
2289                  * It should be noticed that, on multi-frontend devices with
2290                  * different types (terrestrial and cable, for example),
2291                  * a pure DVBv3 application won't be able to use all delivery
2292                  * systems. Yet, changing the DVBv5 cache to the other delivery
2293                  * system should be enough for making it work.
2294                  */
2295                 switch (dvbv3_type(c->delivery_system)) {
2296                 case DVBV3_QPSK:
2297                         info->type = FE_QPSK;
2298                         break;
2299                 case DVBV3_ATSC:
2300                         info->type = FE_ATSC;
2301                         break;
2302                 case DVBV3_QAM:
2303                         info->type = FE_QAM;
2304                         break;
2305                 case DVBV3_OFDM:
2306                         info->type = FE_OFDM;
2307                         break;
2308                 default:
2309                         dev_err(fe->dvb->device,
2310                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2311                                         __func__, c->delivery_system);
2312                         fe->ops.info.type = FE_OFDM;
2313                 }
2314                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2315                                  __func__, c->delivery_system, fe->ops.info.type);
2316
2317                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2318                  * do it, it is done for it. */
2319                 info->caps |= FE_CAN_INVERSION_AUTO;
2320                 err = 0;
2321                 break;
2322         }
2323
2324         case FE_READ_STATUS: {
2325                 enum fe_status *status = parg;
2326
2327                 /* if retune was requested but hasn't occurred yet, prevent
2328                  * that user get signal state from previous tuning */
2329                 if (fepriv->state == FESTATE_RETUNE ||
2330                     fepriv->state == FESTATE_ERROR) {
2331                         err=0;
2332                         *status = 0;
2333                         break;
2334                 }
2335
2336                 if (fe->ops.read_status)
2337                         err = fe->ops.read_status(fe, status);
2338                 break;
2339         }
2340
2341         case FE_READ_BER:
2342                 if (fe->ops.read_ber) {
2343                         if (fepriv->thread)
2344                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2345                         else
2346                                 err = -EAGAIN;
2347                 }
2348                 break;
2349
2350         case FE_READ_SIGNAL_STRENGTH:
2351                 if (fe->ops.read_signal_strength) {
2352                         if (fepriv->thread)
2353                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2354                         else
2355                                 err = -EAGAIN;
2356                 }
2357                 break;
2358
2359         case FE_READ_SNR:
2360                 if (fe->ops.read_snr) {
2361                         if (fepriv->thread)
2362                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2363                         else
2364                                 err = -EAGAIN;
2365                 }
2366                 break;
2367
2368         case FE_READ_UNCORRECTED_BLOCKS:
2369                 if (fe->ops.read_ucblocks) {
2370                         if (fepriv->thread)
2371                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2372                         else
2373                                 err = -EAGAIN;
2374                 }
2375                 break;
2376
2377         case FE_DISEQC_RESET_OVERLOAD:
2378                 if (fe->ops.diseqc_reset_overload) {
2379                         err = fe->ops.diseqc_reset_overload(fe);
2380                         fepriv->state = FESTATE_DISEQC;
2381                         fepriv->status = 0;
2382                 }
2383                 break;
2384
2385         case FE_DISEQC_SEND_MASTER_CMD:
2386                 if (fe->ops.diseqc_send_master_cmd) {
2387                         struct dvb_diseqc_master_cmd *cmd = parg;
2388
2389                         if (cmd->msg_len > sizeof(cmd->msg)) {
2390                                 err = -EINVAL;
2391                                 break;
2392                         }
2393                         err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2394                         fepriv->state = FESTATE_DISEQC;
2395                         fepriv->status = 0;
2396                 }
2397                 break;
2398
2399         case FE_DISEQC_SEND_BURST:
2400                 if (fe->ops.diseqc_send_burst) {
2401                         err = fe->ops.diseqc_send_burst(fe,
2402                                                 (enum fe_sec_mini_cmd)parg);
2403                         fepriv->state = FESTATE_DISEQC;
2404                         fepriv->status = 0;
2405                 }
2406                 break;
2407
2408         case FE_SET_TONE:
2409                 if (fe->ops.set_tone) {
2410                         err = fe->ops.set_tone(fe,
2411                                                (enum fe_sec_tone_mode)parg);
2412                         fepriv->tone = (enum fe_sec_tone_mode)parg;
2413                         fepriv->state = FESTATE_DISEQC;
2414                         fepriv->status = 0;
2415                 }
2416                 break;
2417
2418         case FE_SET_VOLTAGE:
2419                 if (fe->ops.set_voltage) {
2420                         err = fe->ops.set_voltage(fe,
2421                                                   (enum fe_sec_voltage)parg);
2422                         fepriv->voltage = (enum fe_sec_voltage)parg;
2423                         fepriv->state = FESTATE_DISEQC;
2424                         fepriv->status = 0;
2425                 }
2426                 break;
2427
2428         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2429                 if (fe->ops.dishnetwork_send_legacy_command) {
2430                         err = fe->ops.dishnetwork_send_legacy_command(fe,
2431                                                          (unsigned long)parg);
2432                         fepriv->state = FESTATE_DISEQC;
2433                         fepriv->status = 0;
2434                 } else if (fe->ops.set_voltage) {
2435                         /*
2436                          * NOTE: This is a fallback condition.  Some frontends
2437                          * (stv0299 for instance) take longer than 8msec to
2438                          * respond to a set_voltage command.  Those switches
2439                          * need custom routines to switch properly.  For all
2440                          * other frontends, the following should work ok.
2441                          * Dish network legacy switches (as used by Dish500)
2442                          * are controlled by sending 9-bit command words
2443                          * spaced 8msec apart.
2444                          * the actual command word is switch/port dependent
2445                          * so it is up to the userspace application to send
2446                          * the right command.
2447                          * The command must always start with a '0' after
2448                          * initialization, so parg is 8 bits and does not
2449                          * include the initialization or start bit
2450                          */
2451                         unsigned long swcmd = ((unsigned long) parg) << 1;
2452                         ktime_t nexttime;
2453                         ktime_t tv[10];
2454                         int i;
2455                         u8 last = 1;
2456                         if (dvb_frontend_debug)
2457                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2458                         nexttime = ktime_get_real();
2459                         if (dvb_frontend_debug)
2460                                 tv[0] = nexttime;
2461                         /* before sending a command, initialize by sending
2462                          * a 32ms 18V to the switch
2463                          */
2464                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2465                         dvb_frontend_sleep_until(&nexttime, 32000);
2466
2467                         for (i = 0; i < 9; i++) {
2468                                 if (dvb_frontend_debug)
2469                                         tv[i+1] = ktime_get_real();
2470                                 if ((swcmd & 0x01) != last) {
2471                                         /* set voltage to (last ? 13V : 18V) */
2472                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2473                                         last = (last) ? 0 : 1;
2474                                 }
2475                                 swcmd = swcmd >> 1;
2476                                 if (i != 8)
2477                                         dvb_frontend_sleep_until(&nexttime, 8000);
2478                         }
2479                         if (dvb_frontend_debug) {
2480                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2481                                         __func__, fe->dvb->num);
2482                                 for (i = 1; i < 10; i++)
2483                                         printk("%d: %d\n", i,
2484                                         (int) ktime_us_delta(tv[i], tv[i-1]));
2485                         }
2486                         err = 0;
2487                         fepriv->state = FESTATE_DISEQC;
2488                         fepriv->status = 0;
2489                 }
2490                 break;
2491
2492         case FE_DISEQC_RECV_SLAVE_REPLY:
2493                 if (fe->ops.diseqc_recv_slave_reply)
2494                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2495                 break;
2496
2497         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2498                 if (fe->ops.enable_high_lnb_voltage)
2499                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2500                 break;
2501
2502         case FE_SET_FRONTEND:
2503                 err = dvbv3_set_delivery_system(fe);
2504                 if (err)
2505                         break;
2506
2507                 err = dtv_property_cache_sync(fe, c, parg);
2508                 if (err)
2509                         break;
2510                 err = dtv_set_frontend(fe);
2511                 break;
2512         case FE_GET_EVENT:
2513                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2514                 break;
2515
2516         case FE_GET_FRONTEND:
2517                 err = dtv_get_frontend(fe, parg);
2518                 break;
2519
2520         case FE_SET_FRONTEND_TUNE_MODE:
2521                 fepriv->tune_mode_flags = (unsigned long) parg;
2522                 err = 0;
2523                 break;
2524         }
2525
2526         return err;
2527 }
2528
2529
2530 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2531 {
2532         struct dvb_device *dvbdev = file->private_data;
2533         struct dvb_frontend *fe = dvbdev->priv;
2534         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2535
2536         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2537
2538         poll_wait (file, &fepriv->events.wait_queue, wait);
2539
2540         if (fepriv->events.eventw != fepriv->events.eventr)
2541                 return (POLLIN | POLLRDNORM | POLLPRI);
2542
2543         return 0;
2544 }
2545
2546 static int dvb_frontend_open(struct inode *inode, struct file *file)
2547 {
2548         struct dvb_device *dvbdev = file->private_data;
2549         struct dvb_frontend *fe = dvbdev->priv;
2550         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2551         struct dvb_adapter *adapter = fe->dvb;
2552         int ret;
2553
2554         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2555         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2556                 return -ENODEV;
2557
2558         if (adapter->mfe_shared) {
2559                 mutex_lock (&adapter->mfe_lock);
2560
2561                 if (adapter->mfe_dvbdev == NULL)
2562                         adapter->mfe_dvbdev = dvbdev;
2563
2564                 else if (adapter->mfe_dvbdev != dvbdev) {
2565                         struct dvb_device
2566                                 *mfedev = adapter->mfe_dvbdev;
2567                         struct dvb_frontend
2568                                 *mfe = mfedev->priv;
2569                         struct dvb_frontend_private
2570                                 *mfepriv = mfe->frontend_priv;
2571                         int mferetry = (dvb_mfe_wait_time << 1);
2572
2573                         mutex_unlock (&adapter->mfe_lock);
2574                         while (mferetry-- && (mfedev->users != -1 ||
2575                                         mfepriv->thread != NULL)) {
2576                                 if(msleep_interruptible(500)) {
2577                                         if(signal_pending(current))
2578                                                 return -EINTR;
2579                                 }
2580                         }
2581
2582                         mutex_lock (&adapter->mfe_lock);
2583                         if(adapter->mfe_dvbdev != dvbdev) {
2584                                 mfedev = adapter->mfe_dvbdev;
2585                                 mfe = mfedev->priv;
2586                                 mfepriv = mfe->frontend_priv;
2587                                 if (mfedev->users != -1 ||
2588                                                 mfepriv->thread != NULL) {
2589                                         mutex_unlock (&adapter->mfe_lock);
2590                                         return -EBUSY;
2591                                 }
2592                                 adapter->mfe_dvbdev = dvbdev;
2593                         }
2594                 }
2595         }
2596
2597         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2598                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2599                         goto err0;
2600
2601                 /* If we took control of the bus, we need to force
2602                    reinitialization.  This is because many ts_bus_ctrl()
2603                    functions strobe the RESET pin on the demod, and if the
2604                    frontend thread already exists then the dvb_init() routine
2605                    won't get called (which is what usually does initial
2606                    register configuration). */
2607                 fepriv->reinitialise = 1;
2608         }
2609
2610         if ((ret = dvb_generic_open (inode, file)) < 0)
2611                 goto err1;
2612
2613         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2614                 /* normal tune mode when opened R/W */
2615                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2616                 fepriv->tone = -1;
2617                 fepriv->voltage = -1;
2618
2619                 ret = dvb_frontend_start (fe);
2620                 if (ret)
2621                         goto err2;
2622
2623                 /*  empty event queue */
2624                 fepriv->events.eventr = fepriv->events.eventw = 0;
2625         }
2626
2627         if (adapter->mfe_shared)
2628                 mutex_unlock (&adapter->mfe_lock);
2629         return ret;
2630
2631 err2:
2632         dvb_generic_release(inode, file);
2633 err1:
2634         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2635                 fe->ops.ts_bus_ctrl(fe, 0);
2636 err0:
2637         if (adapter->mfe_shared)
2638                 mutex_unlock (&adapter->mfe_lock);
2639         return ret;
2640 }
2641
2642 static int dvb_frontend_release(struct inode *inode, struct file *file)
2643 {
2644         struct dvb_device *dvbdev = file->private_data;
2645         struct dvb_frontend *fe = dvbdev->priv;
2646         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2647         int ret;
2648
2649         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2650
2651         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2652                 fepriv->release_jiffies = jiffies;
2653                 mb();
2654         }
2655
2656         ret = dvb_generic_release (inode, file);
2657
2658         if (dvbdev->users == -1) {
2659                 wake_up(&fepriv->wait_queue);
2660                 if (fe->exit != DVB_FE_NO_EXIT)
2661                         wake_up(&dvbdev->wait_queue);
2662                 if (fe->ops.ts_bus_ctrl)
2663                         fe->ops.ts_bus_ctrl(fe, 0);
2664         }
2665
2666         return ret;
2667 }
2668
2669 static const struct file_operations dvb_frontend_fops = {
2670         .owner          = THIS_MODULE,
2671         .unlocked_ioctl = dvb_generic_ioctl,
2672         .poll           = dvb_frontend_poll,
2673         .open           = dvb_frontend_open,
2674         .release        = dvb_frontend_release,
2675         .llseek         = noop_llseek,
2676 };
2677
2678 int dvb_frontend_suspend(struct dvb_frontend *fe)
2679 {
2680         int ret = 0;
2681
2682         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2683                         fe->id);
2684
2685         if (fe->ops.tuner_ops.suspend)
2686                 ret = fe->ops.tuner_ops.suspend(fe);
2687         else if (fe->ops.tuner_ops.sleep)
2688                 ret = fe->ops.tuner_ops.sleep(fe);
2689
2690         if (fe->ops.sleep)
2691                 ret = fe->ops.sleep(fe);
2692
2693         return ret;
2694 }
2695 EXPORT_SYMBOL(dvb_frontend_suspend);
2696
2697 int dvb_frontend_resume(struct dvb_frontend *fe)
2698 {
2699         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2700         int ret = 0;
2701
2702         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2703                         fe->id);
2704
2705         fe->exit = DVB_FE_DEVICE_RESUME;
2706         if (fe->ops.init)
2707                 ret = fe->ops.init(fe);
2708
2709         if (fe->ops.tuner_ops.resume)
2710                 ret = fe->ops.tuner_ops.resume(fe);
2711         else if (fe->ops.tuner_ops.init)
2712                 ret = fe->ops.tuner_ops.init(fe);
2713
2714         fe->exit = DVB_FE_NO_EXIT;
2715         fepriv->state = FESTATE_RETUNE;
2716         dvb_frontend_wakeup(fe);
2717
2718         return ret;
2719 }
2720 EXPORT_SYMBOL(dvb_frontend_resume);
2721
2722 int dvb_register_frontend(struct dvb_adapter* dvb,
2723                           struct dvb_frontend* fe)
2724 {
2725         struct dvb_frontend_private *fepriv;
2726         const struct dvb_device dvbdev_template = {
2727                 .users = ~0,
2728                 .writers = 1,
2729                 .readers = (~0)-1,
2730                 .fops = &dvb_frontend_fops,
2731 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2732                 .name = fe->ops.info.name,
2733 #endif
2734                 .kernel_ioctl = dvb_frontend_ioctl
2735         };
2736
2737         dev_dbg(dvb->device, "%s:\n", __func__);
2738
2739         if (mutex_lock_interruptible(&frontend_mutex))
2740                 return -ERESTARTSYS;
2741
2742         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2743         if (fe->frontend_priv == NULL) {
2744                 mutex_unlock(&frontend_mutex);
2745                 return -ENOMEM;
2746         }
2747         fepriv = fe->frontend_priv;
2748
2749         sema_init(&fepriv->sem, 1);
2750         init_waitqueue_head (&fepriv->wait_queue);
2751         init_waitqueue_head (&fepriv->events.wait_queue);
2752         mutex_init(&fepriv->events.mtx);
2753         fe->dvb = dvb;
2754         fepriv->inversion = INVERSION_OFF;
2755
2756         dev_info(fe->dvb->device,
2757                         "DVB: registering adapter %i frontend %i (%s)...\n",
2758                         fe->dvb->num, fe->id, fe->ops.info.name);
2759
2760         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2761                              fe, DVB_DEVICE_FRONTEND);
2762
2763         /*
2764          * Initialize the cache to the proper values according with the
2765          * first supported delivery system (ops->delsys[0])
2766          */
2767
2768         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2769         dvb_frontend_clear_cache(fe);
2770
2771         mutex_unlock(&frontend_mutex);
2772         return 0;
2773 }
2774 EXPORT_SYMBOL(dvb_register_frontend);
2775
2776 int dvb_unregister_frontend(struct dvb_frontend* fe)
2777 {
2778         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2779         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2780
2781         mutex_lock(&frontend_mutex);
2782         dvb_frontend_stop (fe);
2783         mutex_unlock(&frontend_mutex);
2784
2785         if (fepriv->dvbdev->users < -1)
2786                 wait_event(fepriv->dvbdev->wait_queue,
2787                                 fepriv->dvbdev->users==-1);
2788
2789         mutex_lock(&frontend_mutex);
2790         dvb_unregister_device (fepriv->dvbdev);
2791
2792         /* fe is invalid now */
2793         kfree(fepriv);
2794         mutex_unlock(&frontend_mutex);
2795         return 0;
2796 }
2797 EXPORT_SYMBOL(dvb_unregister_frontend);
2798
2799 #ifdef CONFIG_MEDIA_ATTACH
2800 void dvb_frontend_detach(struct dvb_frontend* fe)
2801 {
2802         void *ptr;
2803
2804         if (fe->ops.release_sec) {
2805                 fe->ops.release_sec(fe);
2806                 dvb_detach(fe->ops.release_sec);
2807         }
2808         if (fe->ops.tuner_ops.release) {
2809                 fe->ops.tuner_ops.release(fe);
2810                 dvb_detach(fe->ops.tuner_ops.release);
2811         }
2812         if (fe->ops.analog_ops.release) {
2813                 fe->ops.analog_ops.release(fe);
2814                 dvb_detach(fe->ops.analog_ops.release);
2815         }
2816         ptr = (void*)fe->ops.release;
2817         if (ptr) {
2818                 fe->ops.release(fe);
2819                 dvb_detach(ptr);
2820         }
2821 }
2822 #else
2823 void dvb_frontend_detach(struct dvb_frontend* fe)
2824 {
2825         if (fe->ops.release_sec)
2826                 fe->ops.release_sec(fe);
2827         if (fe->ops.tuner_ops.release)
2828                 fe->ops.tuner_ops.release(fe);
2829         if (fe->ops.analog_ops.release)
2830                 fe->ops.analog_ops.release(fe);
2831         if (fe->ops.release)
2832                 fe->ops.release(fe);
2833 }
2834 #endif
2835 EXPORT_SYMBOL(dvb_frontend_detach);