kernel/drivers/media/dvb-core/dvb_frontend.c

   1 /*
   2  * dvb_frontend.c: DVB frontend tuning interface/thread
   3  *
   4  *
   5  * Copyright (C) 1999-2001 Ralph  Metzler
   6  *                         Marcus Metzler
   7  *                         Holger Waechtler
   8  *                                    for convergence integrated media GmbH
   9  *
  10  * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26  */
  27
  28 /* Enables DVBv3 compatibility bits at the headers */
  29 #define __DVB_CORE__
  30
  31 #include <linux/string.h>
  32 #include <linux/kernel.h>
  33 #include <linux/sched.h>
  34 #include <linux/wait.h>
  35 #include <linux/slab.h>
  36 #include <linux/poll.h>
  37 #include <linux/semaphore.h>
  38 #include <linux/module.h>
  39 #include <linux/list.h>
  40 #include <linux/freezer.h>
  41 #include <linux/jiffies.h>
  42 #include <linux/kthread.h>
  43 #include <asm/processor.h>
  44
  45 #include "dvb_frontend.h"
  46 #include "dvbdev.h"
  47 #include <linux/dvb/version.h>
  48
  49 static int dvb_frontend_debug;
  50 static int dvb_shutdown_timeout;
  51 static int dvb_force_auto_inversion;
  52 static int dvb_override_tune_delay;
  53 static int dvb_powerdown_on_sleep = 1;
  54 static int dvb_mfe_wait_time = 5;
  55
  56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  58 module_param(dvb_shutdown_timeout, int, 0644);
  59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  60 module_param(dvb_force_auto_inversion, int, 0644);
  61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  62 module_param(dvb_override_tune_delay, int, 0644);
  63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  64 module_param(dvb_powerdown_on_sleep, int, 0644);
  65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  66 module_param(dvb_mfe_wait_time, int, 0644);
  67 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
  68
  69 #define FESTATE_IDLE 1
  70 #define FESTATE_RETUNE 2
  71 #define FESTATE_TUNING_FAST 4
  72 #define FESTATE_TUNING_SLOW 8
  73 #define FESTATE_TUNED 16
  74 #define FESTATE_ZIGZAG_FAST 32
  75 #define FESTATE_ZIGZAG_SLOW 64
  76 #define FESTATE_DISEQC 128
  77 #define FESTATE_ERROR 256
  78 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  79 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  80 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  81 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  82
  83 #define FE_ALGO_HW              1
  84 /*
  85  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  86  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  87  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  88  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  89  * FESTATE_TUNED. The frontend has successfully locked on.
  90  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  91  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  92  * FESTATE_DISEQC. A DISEQC command has just been issued.
  93  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  94  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  95  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  96  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  97  */
  98
  99 static DEFINE_MUTEX(frontend_mutex);
 100
 101 struct dvb_frontend_private {
 102
 103         /* thread/frontend values */
 104         struct dvb_device *dvbdev;
 105         struct dvb_frontend_parameters parameters_out;
 106         struct dvb_fe_events events;
 107         struct semaphore sem;
 108         struct list_head list_head;
 109         wait_queue_head_t wait_queue;
 110         struct task_struct *thread;
 111         unsigned long release_jiffies;
 112         unsigned int wakeup;
 113         fe_status_t status;
 114         unsigned long tune_mode_flags;
 115         unsigned int delay;
 116         unsigned int reinitialise;
 117         int tone;
 118         int voltage;
 119
 120         /* swzigzag values */
 121         unsigned int state;
 122         unsigned int bending;
 123         int lnb_drift;
 124         unsigned int inversion;
 125         unsigned int auto_step;
 126         unsigned int auto_sub_step;
 127         unsigned int started_auto_step;
 128         unsigned int min_delay;
 129         unsigned int max_drift;
 130         unsigned int step_size;
 131         int quality;
 132         unsigned int check_wrapped;
 133         enum dvbfe_search algo_status;
 134
 135 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
 136         struct media_pipeline pipe;
 137         struct media_entity *pipe_start_entity;
 138 #endif
 139 };
 140
 141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 142 static int dtv_get_frontend(struct dvb_frontend *fe,
 143                             struct dvb_frontend_parameters *p_out);
 144 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 145                                            struct dvb_frontend_parameters *p);
 146
 147 static bool has_get_frontend(struct dvb_frontend *fe)
 148 {
 149         return fe->ops.get_frontend != NULL;
 150 }
 151
 152 /*
 153  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 154  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 155  * otherwise, a DVBv3 call will fail.
 156  */
 157 enum dvbv3_emulation_type {
 158         DVBV3_UNKNOWN,
 159         DVBV3_QPSK,
 160         DVBV3_QAM,
 161         DVBV3_OFDM,
 162         DVBV3_ATSC,
 163 };
 164
 165 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 166 {
 167         switch (delivery_system) {
 168         case SYS_DVBC_ANNEX_A:
 169         case SYS_DVBC_ANNEX_C:
 170                 return DVBV3_QAM;
 171         case SYS_DVBS:
 172         case SYS_DVBS2:
 173         case SYS_TURBO:
 174         case SYS_ISDBS:
 175         case SYS_DSS:
 176                 return DVBV3_QPSK;
 177         case SYS_DVBT:
 178         case SYS_DVBT2:
 179         case SYS_ISDBT:
 180         case SYS_DTMB:
 181                 return DVBV3_OFDM;
 182         case SYS_ATSC:
 183         case SYS_ATSCMH:
 184         case SYS_DVBC_ANNEX_B:
 185                 return DVBV3_ATSC;
 186         case SYS_UNDEFINED:
 187         case SYS_ISDBC:
 188         case SYS_DVBH:
 189         case SYS_DAB:
 190         default:
 191                 /*
 192                  * Doesn't know how to emulate those types and/or
 193                  * there's no frontend driver from this type yet
 194                  * with some emulation code, so, we're not sure yet how
 195                  * to handle them, or they're not compatible with a DVBv3 call.
 196                  */
 197                 return DVBV3_UNKNOWN;
 198         }
 199 }
 200
 201 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 202 {
 203         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 204         struct dvb_fe_events *events = &fepriv->events;
 205         struct dvb_frontend_event *e;
 206         int wp;
 207
 208         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 209
 210         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 211                 dtv_get_frontend(fe, &fepriv->parameters_out);
 212
 213         mutex_lock(&events->mtx);
 214
 215         wp = (events->eventw + 1) % MAX_EVENT;
 216         if (wp == events->eventr) {
 217                 events->overflow = 1;
 218                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 219         }
 220
 221         e = &events->events[events->eventw];
 222         e->status = status;
 223         e->parameters = fepriv->parameters_out;
 224
 225         events->eventw = wp;
 226
 227         mutex_unlock(&events->mtx);
 228
 229         wake_up_interruptible (&events->wait_queue);
 230 }
 231
 232 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 233                             struct dvb_frontend_event *event, int flags)
 234 {
 235         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 236         struct dvb_fe_events *events = &fepriv->events;
 237
 238         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 239
 240         if (events->overflow) {
 241                 events->overflow = 0;
 242                 return -EOVERFLOW;
 243         }
 244
 245         if (events->eventw == events->eventr) {
 246                 int ret;
 247
 248                 if (flags & O_NONBLOCK)
 249                         return -EWOULDBLOCK;
 250
 251                 up(&fepriv->sem);
 252
 253                 ret = wait_event_interruptible (events->wait_queue,
 254                                                 events->eventw != events->eventr);
 255
 256                 if (down_interruptible (&fepriv->sem))
 257                         return -ERESTARTSYS;
 258
 259                 if (ret < 0)
 260                         return ret;
 261         }
 262
 263         mutex_lock(&events->mtx);
 264         *event = events->events[events->eventr];
 265         events->eventr = (events->eventr + 1) % MAX_EVENT;
 266         mutex_unlock(&events->mtx);
 267
 268         return 0;
 269 }
 270
 271 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 272 {
 273         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 274         struct dvb_fe_events *events = &fepriv->events;
 275
 276         mutex_lock(&events->mtx);
 277         events->eventr = events->eventw;
 278         mutex_unlock(&events->mtx);
 279 }
 280
 281 static void dvb_frontend_init(struct dvb_frontend *fe)
 282 {
 283         dev_dbg(fe->dvb->device,
 284                         "%s: initialising adapter %i frontend %i (%s)...\n",
 285                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 286
 287         if (fe->ops.init)
 288                 fe->ops.init(fe);
 289         if (fe->ops.tuner_ops.init) {
 290                 if (fe->ops.i2c_gate_ctrl)
 291                         fe->ops.i2c_gate_ctrl(fe, 1);
 292                 fe->ops.tuner_ops.init(fe);
 293                 if (fe->ops.i2c_gate_ctrl)
 294                         fe->ops.i2c_gate_ctrl(fe, 0);
 295         }
 296 }
 297
 298 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 299 {
 300         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 301
 302         fepriv->reinitialise = 1;
 303         dvb_frontend_wakeup(fe);
 304 }
 305 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 306
 307 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 308 {
 309         int q2;
 310         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 311
 312         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 313
 314         if (locked)
 315                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 316         else
 317                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 318
 319         q2 = fepriv->quality - 128;
 320         q2 *= q2;
 321
 322         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 323 }
 324
 325 /**
 326  * Performs automatic twiddling of frontend parameters.
 327  *
 328  * @param fe The frontend concerned.
 329  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 330  * @returns Number of complete iterations that have been performed.
 331  */
 332 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 333 {
 334         int autoinversion;
 335         int ready = 0;
 336         int fe_set_err = 0;
 337         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 338         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 339         int original_inversion = c->inversion;
 340         u32 original_frequency = c->frequency;
 341
 342         /* are we using autoinversion? */
 343         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 344                          (c->inversion == INVERSION_AUTO));
 345
 346         /* setup parameters correctly */
 347         while(!ready) {
 348                 /* calculate the lnb_drift */
 349                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 350
 351                 /* wrap the auto_step if we've exceeded the maximum drift */
 352                 if (fepriv->lnb_drift > fepriv->max_drift) {
 353                         fepriv->auto_step = 0;
 354                         fepriv->auto_sub_step = 0;
 355                         fepriv->lnb_drift = 0;
 356                 }
 357
 358                 /* perform inversion and +/- zigzag */
 359                 switch(fepriv->auto_sub_step) {
 360                 case 0:
 361                         /* try with the current inversion and current drift setting */
 362                         ready = 1;
 363                         break;
 364
 365                 case 1:
 366                         if (!autoinversion) break;
 367
 368                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 369                         ready = 1;
 370                         break;
 371
 372                 case 2:
 373                         if (fepriv->lnb_drift == 0) break;
 374
 375                         fepriv->lnb_drift = -fepriv->lnb_drift;
 376                         ready = 1;
 377                         break;
 378
 379                 case 3:
 380                         if (fepriv->lnb_drift == 0) break;
 381                         if (!autoinversion) break;
 382
 383                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 384                         fepriv->lnb_drift = -fepriv->lnb_drift;
 385                         ready = 1;
 386                         break;
 387
 388                 default:
 389                         fepriv->auto_step++;
 390                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 391                         break;
 392                 }
 393
 394                 if (!ready) fepriv->auto_sub_step++;
 395         }
 396
 397         /* if this attempt would hit where we started, indicate a complete
 398          * iteration has occurred */
 399         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 400             (fepriv->auto_sub_step == 0) && check_wrapped) {
 401                 return 1;
 402         }
 403
 404         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 405                         "auto_sub_step:%i started_auto_step:%i\n",
 406                         __func__, fepriv->lnb_drift, fepriv->inversion,
 407                         fepriv->auto_step, fepriv->auto_sub_step,
 408                         fepriv->started_auto_step);
 409
 410         /* set the frontend itself */
 411         c->frequency += fepriv->lnb_drift;
 412         if (autoinversion)
 413                 c->inversion = fepriv->inversion;
 414         tmp = *c;
 415         if (fe->ops.set_frontend)
 416                 fe_set_err = fe->ops.set_frontend(fe);
 417         *c = tmp;
 418         if (fe_set_err < 0) {
 419                 fepriv->state = FESTATE_ERROR;
 420                 return fe_set_err;
 421         }
 422
 423         c->frequency = original_frequency;
 424         c->inversion = original_inversion;
 425
 426         fepriv->auto_sub_step++;
 427         return 0;
 428 }
 429
 430 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 431 {
 432         fe_status_t s = 0;
 433         int retval = 0;
 434         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 435         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 436
 437         /* if we've got no parameters, just keep idling */
 438         if (fepriv->state & FESTATE_IDLE) {
 439                 fepriv->delay = 3*HZ;
 440                 fepriv->quality = 0;
 441                 return;
 442         }
 443
 444         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 445         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 446                 if (fepriv->state & FESTATE_RETUNE) {
 447                         tmp = *c;
 448                         if (fe->ops.set_frontend)
 449                                 retval = fe->ops.set_frontend(fe);
 450                         *c = tmp;
 451                         if (retval < 0)
 452                                 fepriv->state = FESTATE_ERROR;
 453                         else
 454                                 fepriv->state = FESTATE_TUNED;
 455                 }
 456                 fepriv->delay = 3*HZ;
 457                 fepriv->quality = 0;
 458                 return;
 459         }
 460
 461         /* get the frontend status */
 462         if (fepriv->state & FESTATE_RETUNE) {
 463                 s = 0;
 464         } else {
 465                 if (fe->ops.read_status)
 466                         fe->ops.read_status(fe, &s);
 467                 if (s != fepriv->status) {
 468                         dvb_frontend_add_event(fe, s);
 469                         fepriv->status = s;
 470                 }
 471         }
 472
 473         /* if we're not tuned, and we have a lock, move to the TUNED state */
 474         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 475                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 476                 fepriv->state = FESTATE_TUNED;
 477
 478                 /* if we're tuned, then we have determined the correct inversion */
 479                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 480                     (c->inversion == INVERSION_AUTO)) {
 481                         c->inversion = fepriv->inversion;
 482                 }
 483                 return;
 484         }
 485
 486         /* if we are tuned already, check we're still locked */
 487         if (fepriv->state & FESTATE_TUNED) {
 488                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 489
 490                 /* we're tuned, and the lock is still good... */
 491                 if (s & FE_HAS_LOCK) {
 492                         return;
 493                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 494                         fepriv->state = FESTATE_ZIGZAG_FAST;
 495                         fepriv->started_auto_step = fepriv->auto_step;
 496                         fepriv->check_wrapped = 0;
 497                 }
 498         }
 499
 500         /* don't actually do anything if we're in the LOSTLOCK state,
 501          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 502         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 503             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 504                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 505                 return;
 506         }
 507
 508         /* don't do anything if we're in the DISEQC state, since this
 509          * might be someone with a motorized dish controlled by DISEQC.
 510          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 511         if (fepriv->state & FESTATE_DISEQC) {
 512                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 513                 return;
 514         }
 515
 516         /* if we're in the RETUNE state, set everything up for a brand
 517          * new scan, keeping the current inversion setting, as the next
 518          * tune is _very_ likely to require the same */
 519         if (fepriv->state & FESTATE_RETUNE) {
 520                 fepriv->lnb_drift = 0;
 521                 fepriv->auto_step = 0;
 522                 fepriv->auto_sub_step = 0;
 523                 fepriv->started_auto_step = 0;
 524                 fepriv->check_wrapped = 0;
 525         }
 526
 527         /* fast zigzag. */
 528         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 529                 fepriv->delay = fepriv->min_delay;
 530
 531                 /* perform a tune */
 532                 retval = dvb_frontend_swzigzag_autotune(fe,
 533                                                         fepriv->check_wrapped);
 534                 if (retval < 0) {
 535                         return;
 536                 } else if (retval) {
 537                         /* OK, if we've run out of trials at the fast speed.
 538                          * Drop back to slow for the _next_ attempt */
 539                         fepriv->state = FESTATE_SEARCHING_SLOW;
 540                         fepriv->started_auto_step = fepriv->auto_step;
 541                         return;
 542                 }
 543                 fepriv->check_wrapped = 1;
 544
 545                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 546                  * This ensures we cannot return from an
 547                  * FE_SET_FRONTEND ioctl before the first frontend tune
 548                  * occurs */
 549                 if (fepriv->state & FESTATE_RETUNE) {
 550                         fepriv->state = FESTATE_TUNING_FAST;
 551                 }
 552         }
 553
 554         /* slow zigzag */
 555         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 556                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 557
 558                 /* Note: don't bother checking for wrapping; we stay in this
 559                  * state until we get a lock */
 560                 dvb_frontend_swzigzag_autotune(fe, 0);
 561         }
 562 }
 563
 564 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 565 {
 566         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 567
 568         if (fe->exit != DVB_FE_NO_EXIT)
 569                 return 1;
 570
 571         if (fepriv->dvbdev->writers == 1)
 572                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 573                                   dvb_shutdown_timeout * HZ))
 574                         return 1;
 575
 576         return 0;
 577 }
 578
 579 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 580 {
 581         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 582
 583         if (fepriv->wakeup) {
 584                 fepriv->wakeup = 0;
 585                 return 1;
 586         }
 587         return dvb_frontend_is_exiting(fe);
 588 }
 589
 590 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 591 {
 592         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 593
 594         fepriv->wakeup = 1;
 595         wake_up_interruptible(&fepriv->wait_queue);
 596 }
 597
 598 /**
 599  * dvb_enable_media_tuner() - tries to enable the DVB tuner
 600  *
 601  * @fe:         struct dvb_frontend pointer
 602  *
 603  * This function ensures that just one media tuner is enabled for a given
 604  * frontend. It has two different behaviors:
 605  * - For trivial devices with just one tuner:
 606  *   it just enables the existing tuner->fe link
 607  * - For devices with more than one tuner:
 608  *   It is up to the driver to implement the logic that will enable one tuner
 609  *   and disable the other ones. However, if more than one tuner is enabled for
 610  *   the same frontend, it will print an error message and return -EINVAL.
 611  *
 612  * At return, it will return the error code returned by media_entity_setup_link,
 613  * or 0 if everything is OK, if no tuner is linked to the frontend or if the
 614  * mdev is NULL.
 615  */
 616 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 617 static int dvb_enable_media_tuner(struct dvb_frontend *fe)
 618 {
 619         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 620         struct dvb_adapter *adapter = fe->dvb;
 621         struct media_device *mdev = adapter->mdev;
 622         struct media_entity  *entity, *source;
 623         struct media_link *link, *found_link = NULL;
 624         int i, ret, n_links = 0, active_links = 0;
 625
 626         fepriv->pipe_start_entity = NULL;
 627
 628         if (!mdev)
 629                 return 0;
 630
 631         entity = fepriv->dvbdev->entity;
 632         fepriv->pipe_start_entity = entity;
 633
 634         for (i = 0; i < entity->num_links; i++) {
 635                 link = &entity->links[i];
 636                 if (link->sink->entity == entity) {
 637                         found_link = link;
 638                         n_links++;
 639                         if (link->flags & MEDIA_LNK_FL_ENABLED)
 640                                 active_links++;
 641                 }
 642         }
 643
 644         if (!n_links || active_links == 1 || !found_link)
 645                 return 0;
 646
 647         /*
 648          * If a frontend has more than one tuner linked, it is up to the driver
 649          * to select with one will be the active one, as the frontend core can't
 650          * guess. If the driver doesn't do that, it is a bug.
 651          */
 652         if (n_links > 1 && active_links != 1) {
 653                 dev_err(fe->dvb->device,
 654                         "WARNING: there are %d active links among %d tuners. This is a driver's bug!\n",
 655                         active_links, n_links);
 656                 return -EINVAL;
 657         }
 658
 659         source = found_link->source->entity;
 660         fepriv->pipe_start_entity = source;
 661         for (i = 0; i < source->num_links; i++) {
 662                 struct media_entity *sink;
 663                 int flags = 0;
 664
 665                 link = &source->links[i];
 666                 sink = link->sink->entity;
 667
 668                 if (sink == entity)
 669                         flags = MEDIA_LNK_FL_ENABLED;
 670
 671                 ret = media_entity_setup_link(link, flags);
 672                 if (ret) {
 673                         dev_err(fe->dvb->device,
 674                                 "Couldn't change link %s->%s to %s. Error %d\n",
 675                                 source->name, sink->name,
 676                                 flags ? "enabled" : "disabled",
 677                                 ret);
 678                         return ret;
 679                 } else
 680                         dev_dbg(fe->dvb->device,
 681                                 "link %s->%s was %s\n",
 682                                 source->name, sink->name,
 683                                 flags ? "ENABLED" : "disabled");
 684         }
 685         return 0;
 686 }
 687 #endif
 688
 689 static int dvb_frontend_thread(void *data)
 690 {
 691         struct dvb_frontend *fe = data;
 692         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 693         fe_status_t s;
 694         enum dvbfe_algo algo;
 695 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 696         int ret;
 697 #endif
 698
 699         bool re_tune = false;
 700         bool semheld = false;
 701
 702         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 703
 704         fepriv->check_wrapped = 0;
 705         fepriv->quality = 0;
 706         fepriv->delay = 3*HZ;
 707         fepriv->status = 0;
 708         fepriv->wakeup = 0;
 709         fepriv->reinitialise = 0;
 710
 711 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 712         ret = dvb_enable_media_tuner(fe);
 713         if (ret) {
 714                 /* FIXME: return an error if it fails */
 715                 dev_info(fe->dvb->device,
 716                         "proceeding with FE task\n");
 717         } else if (fepriv->pipe_start_entity) {
 718                 ret = media_entity_pipeline_start(fepriv->pipe_start_entity,
 719                                                   &fepriv->pipe);
 720                 if (ret)
 721                         return ret;
 722         }
 723 #endif
 724
 725         dvb_frontend_init(fe);
 726
 727         set_freezable();
 728         while (1) {
 729                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 730 restart:
 731                 wait_event_interruptible_timeout(fepriv->wait_queue,
 732                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 733                                 || freezing(current),
 734                         fepriv->delay);
 735
 736                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 737                         /* got signal or quitting */
 738                         if (!down_interruptible(&fepriv->sem))
 739                                 semheld = true;
 740                         fe->exit = DVB_FE_NORMAL_EXIT;
 741                         break;
 742                 }
 743
 744                 if (try_to_freeze())
 745                         goto restart;
 746
 747                 if (down_interruptible(&fepriv->sem))
 748                         break;
 749
 750                 if (fepriv->reinitialise) {
 751                         dvb_frontend_init(fe);
 752                         if (fe->ops.set_tone && fepriv->tone != -1)
 753                                 fe->ops.set_tone(fe, fepriv->tone);
 754                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 755                                 fe->ops.set_voltage(fe, fepriv->voltage);
 756                         fepriv->reinitialise = 0;
 757                 }
 758
 759                 /* do an iteration of the tuning loop */
 760                 if (fe->ops.get_frontend_algo) {
 761                         algo = fe->ops.get_frontend_algo(fe);
 762                         switch (algo) {
 763                         case DVBFE_ALGO_HW:
 764                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 765
 766                                 if (fepriv->state & FESTATE_RETUNE) {
 767                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 768                                         re_tune = true;
 769                                         fepriv->state = FESTATE_TUNED;
 770                                 } else {
 771                                         re_tune = false;
 772                                 }
 773
 774                                 if (fe->ops.tune)
 775                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 776
 777                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 778                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 779                                         dvb_frontend_add_event(fe, s);
 780                                         fepriv->status = s;
 781                                 }
 782                                 break;
 783                         case DVBFE_ALGO_SW:
 784                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 785                                 dvb_frontend_swzigzag(fe);
 786                                 break;
 787                         case DVBFE_ALGO_CUSTOM:
 788                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 789                                 if (fepriv->state & FESTATE_RETUNE) {
 790                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 791                                         fepriv->state = FESTATE_TUNED;
 792                                 }
 793                                 /* Case where we are going to search for a carrier
 794                                  * User asked us to retune again for some reason, possibly
 795                                  * requesting a search with a new set of parameters
 796                                  */
 797                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 798                                         if (fe->ops.search) {
 799                                                 fepriv->algo_status = fe->ops.search(fe);
 800                                                 /* We did do a search as was requested, the flags are
 801                                                  * now unset as well and has the flags wrt to search.
 802                                                  */
 803                                         } else {
 804                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 805                                         }
 806                                 }
 807                                 /* Track the carrier if the search was successful */
 808                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 809                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 810                                         fepriv->delay = HZ / 2;
 811                                 }
 812                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
 813                                 fe->ops.read_status(fe, &s);
 814                                 if (s != fepriv->status) {
 815                                         dvb_frontend_add_event(fe, s); /* update event list */
 816                                         fepriv->status = s;
 817                                         if (!(s & FE_HAS_LOCK)) {
 818                                                 fepriv->delay = HZ / 10;
 819                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 820                                         } else {
 821                                                 fepriv->delay = 60 * HZ;
 822                                         }
 823                                 }
 824                                 break;
 825                         default:
 826                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 827                                 break;
 828                         }
 829                 } else {
 830                         dvb_frontend_swzigzag(fe);
 831                 }
 832         }
 833
 834 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 835         if (fepriv->pipe_start_entity)
 836                 media_entity_pipeline_stop(fepriv->pipe_start_entity);
 837         fepriv->pipe_start_entity = NULL;
 838 #endif
 839
 840         if (dvb_powerdown_on_sleep) {
 841                 if (fe->ops.set_voltage)
 842                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 843                 if (fe->ops.tuner_ops.sleep) {
 844                         if (fe->ops.i2c_gate_ctrl)
 845                                 fe->ops.i2c_gate_ctrl(fe, 1);
 846                         fe->ops.tuner_ops.sleep(fe);
 847                         if (fe->ops.i2c_gate_ctrl)
 848                                 fe->ops.i2c_gate_ctrl(fe, 0);
 849                 }
 850                 if (fe->ops.sleep)
 851                         fe->ops.sleep(fe);
 852         }
 853
 854         fepriv->thread = NULL;
 855         if (kthread_should_stop())
 856                 fe->exit = DVB_FE_DEVICE_REMOVED;
 857         else
 858                 fe->exit = DVB_FE_NO_EXIT;
 859         mb();
 860
 861         if (semheld)
 862                 up(&fepriv->sem);
 863         dvb_frontend_wakeup(fe);
 864         return 0;
 865 }
 866
 867 static void dvb_frontend_stop(struct dvb_frontend *fe)
 868 {
 869         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 870
 871         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 872
 873         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 874                 fe->exit = DVB_FE_NORMAL_EXIT;
 875         mb();
 876
 877         if (!fepriv->thread)
 878                 return;
 879
 880         kthread_stop(fepriv->thread);
 881
 882         sema_init(&fepriv->sem, 1);
 883         fepriv->state = FESTATE_IDLE;
 884
 885         /* paranoia check in case a signal arrived */
 886         if (fepriv->thread)
 887                 dev_warn(fe->dvb->device,
 888                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 889                                 fepriv->thread);
 890 }
 891
 892 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 893 {
 894         return ((curtime.tv_usec < lasttime.tv_usec) ?
 895                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 896                 curtime.tv_usec - lasttime.tv_usec);
 897 }
 898 EXPORT_SYMBOL(timeval_usec_diff);
 899
 900 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 901 {
 902         curtime->tv_usec += add_usec;
 903         if (curtime->tv_usec >= 1000000) {
 904                 curtime->tv_usec -= 1000000;
 905                 curtime->tv_sec++;
 906         }
 907 }
 908
 909 /*
 910  * Sleep until gettimeofday() > waketime + add_usec
 911  * This needs to be as precise as possible, but as the delay is
 912  * usually between 2ms and 32ms, it is done using a scheduled msleep
 913  * followed by usleep (normally a busy-wait loop) for the remainder
 914  */
 915 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 916 {
 917         struct timeval lasttime;
 918         s32 delta, newdelta;
 919
 920         timeval_usec_add(waketime, add_usec);
 921
 922         do_gettimeofday(&lasttime);
 923         delta = timeval_usec_diff(lasttime, *waketime);
 924         if (delta > 2500) {
 925                 msleep((delta - 1500) / 1000);
 926                 do_gettimeofday(&lasttime);
 927                 newdelta = timeval_usec_diff(lasttime, *waketime);
 928                 delta = (newdelta > delta) ? 0 : newdelta;
 929         }
 930         if (delta > 0)
 931                 udelay(delta);
 932 }
 933 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 934
 935 static int dvb_frontend_start(struct dvb_frontend *fe)
 936 {
 937         int ret;
 938         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 939         struct task_struct *fe_thread;
 940
 941         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 942
 943         if (fepriv->thread) {
 944                 if (fe->exit == DVB_FE_NO_EXIT)
 945                         return 0;
 946                 else
 947                         dvb_frontend_stop (fe);
 948         }
 949
 950         if (signal_pending(current))
 951                 return -EINTR;
 952         if (down_interruptible (&fepriv->sem))
 953                 return -EINTR;
 954
 955         fepriv->state = FESTATE_IDLE;
 956         fe->exit = DVB_FE_NO_EXIT;
 957         fepriv->thread = NULL;
 958         mb();
 959
 960         fe_thread = kthread_run(dvb_frontend_thread, fe,
 961                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 962         if (IS_ERR(fe_thread)) {
 963                 ret = PTR_ERR(fe_thread);
 964                 dev_warn(fe->dvb->device,
 965                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 966                                 ret);
 967                 up(&fepriv->sem);
 968                 return ret;
 969         }
 970         fepriv->thread = fe_thread;
 971         return 0;
 972 }
 973
 974 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 975                                         u32 *freq_min, u32 *freq_max)
 976 {
 977         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 978
 979         if (fe->ops.info.frequency_max == 0)
 980                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 981         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 982                 *freq_max = fe->ops.info.frequency_max;
 983         else
 984                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 985
 986         if (*freq_min == 0 || *freq_max == 0)
 987                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 988                                 fe->dvb->num, fe->id);
 989 }
 990
 991 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 992 {
 993         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 994         u32 freq_min;
 995         u32 freq_max;
 996
 997         /* range check: frequency */
 998         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 999         if ((freq_min && c->frequency < freq_min) ||
1000             (freq_max && c->frequency > freq_max)) {
1001                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
1002                                 fe->dvb->num, fe->id, c->frequency,
1003                                 freq_min, freq_max);
1004                 return -EINVAL;
1005         }
1006
1007         /* range check: symbol rate */
1008         switch (c->delivery_system) {
1009         case SYS_DVBS:
1010         case SYS_DVBS2:
1011         case SYS_TURBO:
1012         case SYS_DVBC_ANNEX_A:
1013         case SYS_DVBC_ANNEX_C:
1014                 if ((fe->ops.info.symbol_rate_min &&
1015                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
1016                     (fe->ops.info.symbol_rate_max &&
1017                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
1018                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
1019                                         fe->dvb->num, fe->id, c->symbol_rate,
1020                                         fe->ops.info.symbol_rate_min,
1021                                         fe->ops.info.symbol_rate_max);
1022                         return -EINVAL;
1023                 }
1024         default:
1025                 break;
1026         }
1027
1028         return 0;
1029 }
1030
1031 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
1032 {
1033         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1034         int i;
1035         u32 delsys;
1036
1037         delsys = c->delivery_system;
1038         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
1039         c->delivery_system = delsys;
1040
1041         c->state = DTV_CLEAR;
1042
1043         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1044                         __func__, c->delivery_system);
1045
1046         c->transmission_mode = TRANSMISSION_MODE_AUTO;
1047         c->bandwidth_hz = 0;    /* AUTO */
1048         c->guard_interval = GUARD_INTERVAL_AUTO;
1049         c->hierarchy = HIERARCHY_AUTO;
1050         c->symbol_rate = 0;
1051         c->code_rate_HP = FEC_AUTO;
1052         c->code_rate_LP = FEC_AUTO;
1053         c->fec_inner = FEC_AUTO;
1054         c->rolloff = ROLLOFF_AUTO;
1055         c->voltage = SEC_VOLTAGE_OFF;
1056         c->sectone = SEC_TONE_OFF;
1057         c->pilot = PILOT_AUTO;
1058
1059         c->isdbt_partial_reception = 0;
1060         c->isdbt_sb_mode = 0;
1061         c->isdbt_sb_subchannel = 0;
1062         c->isdbt_sb_segment_idx = 0;
1063         c->isdbt_sb_segment_count = 0;
1064         c->isdbt_layer_enabled = 0;
1065         for (i = 0; i < 3; i++) {
1066                 c->layer[i].fec = FEC_AUTO;
1067                 c->layer[i].modulation = QAM_AUTO;
1068                 c->layer[i].interleaving = 0;
1069                 c->layer[i].segment_count = 0;
1070         }
1071
1072         c->stream_id = NO_STREAM_ID_FILTER;
1073
1074         switch (c->delivery_system) {
1075         case SYS_DVBS:
1076         case SYS_DVBS2:
1077         case SYS_TURBO:
1078                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1079                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1080                 break;
1081         case SYS_ATSC:
1082                 c->modulation = VSB_8;
1083                 break;
1084         case SYS_ISDBS:
1085                 c->symbol_rate = 28860000;
1086                 c->rolloff = ROLLOFF_35;
1087                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1088                 break;
1089         default:
1090                 c->modulation = QAM_AUTO;
1091                 break;
1092         }
1093
1094         c->lna = LNA_AUTO;
1095
1096         return 0;
1097 }
1098
1099 #define _DTV_CMD(n, s, b) \
1100 [n] = { \
1101         .name = #n, \
1102         .cmd  = n, \
1103         .set  = s,\
1104         .buffer = b \
1105 }
1106
1107 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1108         _DTV_CMD(DTV_TUNE, 1, 0),
1109         _DTV_CMD(DTV_CLEAR, 1, 0),
1110
1111         /* Set */
1112         _DTV_CMD(DTV_FREQUENCY, 1, 0),
1113         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1114         _DTV_CMD(DTV_MODULATION, 1, 0),
1115         _DTV_CMD(DTV_INVERSION, 1, 0),
1116         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1117         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1118         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1119         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1120         _DTV_CMD(DTV_TONE, 1, 0),
1121         _DTV_CMD(DTV_PILOT, 1, 0),
1122         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1123         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1124         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1125         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1126         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1127         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1128         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1129         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1130
1131         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1132         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1133         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1134         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1135         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1136         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1137         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1138         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1139         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1140         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1141         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1142         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1143         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1144         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1145         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1146         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1147         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1148         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1149
1150         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1151         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1152         _DTV_CMD(DTV_LNA, 1, 0),
1153
1154         /* Get */
1155         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1156         _DTV_CMD(DTV_API_VERSION, 0, 0),
1157
1158         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1159
1160         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1161         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1162
1163         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1164         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1165         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1166         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1167         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1168         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1169         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1170         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1171         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1172         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1173         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1174         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1175         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1176
1177         /* Statistics API */
1178         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1179         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1180         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1181         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1182         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1183         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1184         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1185         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1186 };
1187
1188 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1189 {
1190         int i;
1191
1192         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1193                 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1194                                 __func__, tvp->cmd);
1195                 return;
1196         }
1197
1198         dev_dbg(fe->dvb->device, "%s: tvp.cmd    = 0x%08x (%s)\n", __func__,
1199                         tvp->cmd, dtv_cmds[tvp->cmd].name);
1200
1201         if (dtv_cmds[tvp->cmd].buffer) {
1202                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1203                         __func__, tvp->u.buffer.len);
1204
1205                 for(i = 0; i < tvp->u.buffer.len; i++)
1206                         dev_dbg(fe->dvb->device,
1207                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1208                                         __func__, i, tvp->u.buffer.data[i]);
1209         } else {
1210                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1211                                 tvp->u.data);
1212         }
1213 }
1214
1215 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1216  * drivers can use a single set_frontend tuning function, regardless of whether
1217  * it's being used for the legacy or new API, reducing code and complexity.
1218  */
1219 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1220                                    struct dtv_frontend_properties *c,
1221                                    const struct dvb_frontend_parameters *p)
1222 {
1223         c->frequency = p->frequency;
1224         c->inversion = p->inversion;
1225
1226         switch (dvbv3_type(c->delivery_system)) {
1227         case DVBV3_QPSK:
1228                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1229                 c->symbol_rate = p->u.qpsk.symbol_rate;
1230                 c->fec_inner = p->u.qpsk.fec_inner;
1231                 break;
1232         case DVBV3_QAM:
1233                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1234                 c->symbol_rate = p->u.qam.symbol_rate;
1235                 c->fec_inner = p->u.qam.fec_inner;
1236                 c->modulation = p->u.qam.modulation;
1237                 break;
1238         case DVBV3_OFDM:
1239                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1240
1241                 switch (p->u.ofdm.bandwidth) {
1242                 case BANDWIDTH_10_MHZ:
1243                         c->bandwidth_hz = 10000000;
1244                         break;
1245                 case BANDWIDTH_8_MHZ:
1246                         c->bandwidth_hz = 8000000;
1247                         break;
1248                 case BANDWIDTH_7_MHZ:
1249                         c->bandwidth_hz = 7000000;
1250                         break;
1251                 case BANDWIDTH_6_MHZ:
1252                         c->bandwidth_hz = 6000000;
1253                         break;
1254                 case BANDWIDTH_5_MHZ:
1255                         c->bandwidth_hz = 5000000;
1256                         break;
1257                 case BANDWIDTH_1_712_MHZ:
1258                         c->bandwidth_hz = 1712000;
1259                         break;
1260                 case BANDWIDTH_AUTO:
1261                         c->bandwidth_hz = 0;
1262                 }
1263
1264                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1265                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1266                 c->modulation = p->u.ofdm.constellation;
1267                 c->transmission_mode = p->u.ofdm.transmission_mode;
1268                 c->guard_interval = p->u.ofdm.guard_interval;
1269                 c->hierarchy = p->u.ofdm.hierarchy_information;
1270                 break;
1271         case DVBV3_ATSC:
1272                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1273                 c->modulation = p->u.vsb.modulation;
1274                 if (c->delivery_system == SYS_ATSCMH)
1275                         break;
1276                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1277                         c->delivery_system = SYS_ATSC;
1278                 else
1279                         c->delivery_system = SYS_DVBC_ANNEX_B;
1280                 break;
1281         case DVBV3_UNKNOWN:
1282                 dev_err(fe->dvb->device,
1283                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1284                                 __func__, c->delivery_system);
1285                 return -EINVAL;
1286         }
1287
1288         return 0;
1289 }
1290
1291 /* Ensure the cached values are set correctly in the frontend
1292  * legacy tuning structures, for the advanced tuning API.
1293  */
1294 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1295                                             struct dvb_frontend_parameters *p)
1296 {
1297         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1298
1299         p->frequency = c->frequency;
1300         p->inversion = c->inversion;
1301
1302         switch (dvbv3_type(c->delivery_system)) {
1303         case DVBV3_UNKNOWN:
1304                 dev_err(fe->dvb->device,
1305                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1306                                 __func__, c->delivery_system);
1307                 return -EINVAL;
1308         case DVBV3_QPSK:
1309                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1310                 p->u.qpsk.symbol_rate = c->symbol_rate;
1311                 p->u.qpsk.fec_inner = c->fec_inner;
1312                 break;
1313         case DVBV3_QAM:
1314                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1315                 p->u.qam.symbol_rate = c->symbol_rate;
1316                 p->u.qam.fec_inner = c->fec_inner;
1317                 p->u.qam.modulation = c->modulation;
1318                 break;
1319         case DVBV3_OFDM:
1320                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1321                 switch (c->bandwidth_hz) {
1322                 case 10000000:
1323                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1324                         break;
1325                 case 8000000:
1326                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1327                         break;
1328                 case 7000000:
1329                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1330                         break;
1331                 case 6000000:
1332                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1333                         break;
1334                 case 5000000:
1335                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1336                         break;
1337                 case 1712000:
1338                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1339                         break;
1340                 case 0:
1341                 default:
1342                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1343                 }
1344                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1345                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1346                 p->u.ofdm.constellation = c->modulation;
1347                 p->u.ofdm.transmission_mode = c->transmission_mode;
1348                 p->u.ofdm.guard_interval = c->guard_interval;
1349                 p->u.ofdm.hierarchy_information = c->hierarchy;
1350                 break;
1351         case DVBV3_ATSC:
1352                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1353                 p->u.vsb.modulation = c->modulation;
1354                 break;
1355         }
1356         return 0;
1357 }
1358
1359 /**
1360  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1361  * @fe:         struct dvb_frontend pointer
1362  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1363  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1364  *
1365  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1366  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1367  * If p_out is not null, it will update the DVBv3 params pointed by it.
1368  */
1369 static int dtv_get_frontend(struct dvb_frontend *fe,
1370                             struct dvb_frontend_parameters *p_out)
1371 {
1372         int r;
1373
1374         if (fe->ops.get_frontend) {
1375                 r = fe->ops.get_frontend(fe);
1376                 if (unlikely(r < 0))
1377                         return r;
1378                 if (p_out)
1379                         dtv_property_legacy_params_sync(fe, p_out);
1380                 return 0;
1381         }
1382
1383         /* As everything is in cache, get_frontend fops are always supported */
1384         return 0;
1385 }
1386
1387 static int dvb_frontend_ioctl_legacy(struct file *file,
1388                         unsigned int cmd, void *parg);
1389 static int dvb_frontend_ioctl_properties(struct file *file,
1390                         unsigned int cmd, void *parg);
1391
1392 static int dtv_property_process_get(struct dvb_frontend *fe,
1393                                     const struct dtv_frontend_properties *c,
1394                                     struct dtv_property *tvp,
1395                                     struct file *file)
1396 {
1397         int r, ncaps;
1398
1399         switch(tvp->cmd) {
1400         case DTV_ENUM_DELSYS:
1401                 ncaps = 0;
1402                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1403                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1404                         ncaps++;
1405                 }
1406                 tvp->u.buffer.len = ncaps;
1407                 break;
1408         case DTV_FREQUENCY:
1409                 tvp->u.data = c->frequency;
1410                 break;
1411         case DTV_MODULATION:
1412                 tvp->u.data = c->modulation;
1413                 break;
1414         case DTV_BANDWIDTH_HZ:
1415                 tvp->u.data = c->bandwidth_hz;
1416                 break;
1417         case DTV_INVERSION:
1418                 tvp->u.data = c->inversion;
1419                 break;
1420         case DTV_SYMBOL_RATE:
1421                 tvp->u.data = c->symbol_rate;
1422                 break;
1423         case DTV_INNER_FEC:
1424                 tvp->u.data = c->fec_inner;
1425                 break;
1426         case DTV_PILOT:
1427                 tvp->u.data = c->pilot;
1428                 break;
1429         case DTV_ROLLOFF:
1430                 tvp->u.data = c->rolloff;
1431                 break;
1432         case DTV_DELIVERY_SYSTEM:
1433                 tvp->u.data = c->delivery_system;
1434                 break;
1435         case DTV_VOLTAGE:
1436                 tvp->u.data = c->voltage;
1437                 break;
1438         case DTV_TONE:
1439                 tvp->u.data = c->sectone;
1440                 break;
1441         case DTV_API_VERSION:
1442                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1443                 break;
1444         case DTV_CODE_RATE_HP:
1445                 tvp->u.data = c->code_rate_HP;
1446                 break;
1447         case DTV_CODE_RATE_LP:
1448                 tvp->u.data = c->code_rate_LP;
1449                 break;
1450         case DTV_GUARD_INTERVAL:
1451                 tvp->u.data = c->guard_interval;
1452                 break;
1453         case DTV_TRANSMISSION_MODE:
1454                 tvp->u.data = c->transmission_mode;
1455                 break;
1456         case DTV_HIERARCHY:
1457                 tvp->u.data = c->hierarchy;
1458                 break;
1459         case DTV_INTERLEAVING:
1460                 tvp->u.data = c->interleaving;
1461                 break;
1462
1463         /* ISDB-T Support here */
1464         case DTV_ISDBT_PARTIAL_RECEPTION:
1465                 tvp->u.data = c->isdbt_partial_reception;
1466                 break;
1467         case DTV_ISDBT_SOUND_BROADCASTING:
1468                 tvp->u.data = c->isdbt_sb_mode;
1469                 break;
1470         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1471                 tvp->u.data = c->isdbt_sb_subchannel;
1472                 break;
1473         case DTV_ISDBT_SB_SEGMENT_IDX:
1474                 tvp->u.data = c->isdbt_sb_segment_idx;
1475                 break;
1476         case DTV_ISDBT_SB_SEGMENT_COUNT:
1477                 tvp->u.data = c->isdbt_sb_segment_count;
1478                 break;
1479         case DTV_ISDBT_LAYER_ENABLED:
1480                 tvp->u.data = c->isdbt_layer_enabled;
1481                 break;
1482         case DTV_ISDBT_LAYERA_FEC:
1483                 tvp->u.data = c->layer[0].fec;
1484                 break;
1485         case DTV_ISDBT_LAYERA_MODULATION:
1486                 tvp->u.data = c->layer[0].modulation;
1487                 break;
1488         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1489                 tvp->u.data = c->layer[0].segment_count;
1490                 break;
1491         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1492                 tvp->u.data = c->layer[0].interleaving;
1493                 break;
1494         case DTV_ISDBT_LAYERB_FEC:
1495                 tvp->u.data = c->layer[1].fec;
1496                 break;
1497         case DTV_ISDBT_LAYERB_MODULATION:
1498                 tvp->u.data = c->layer[1].modulation;
1499                 break;
1500         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1501                 tvp->u.data = c->layer[1].segment_count;
1502                 break;
1503         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1504                 tvp->u.data = c->layer[1].interleaving;
1505                 break;
1506         case DTV_ISDBT_LAYERC_FEC:
1507                 tvp->u.data = c->layer[2].fec;
1508                 break;
1509         case DTV_ISDBT_LAYERC_MODULATION:
1510                 tvp->u.data = c->layer[2].modulation;
1511                 break;
1512         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1513                 tvp->u.data = c->layer[2].segment_count;
1514                 break;
1515         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1516                 tvp->u.data = c->layer[2].interleaving;
1517                 break;
1518
1519         /* Multistream support */
1520         case DTV_STREAM_ID:
1521         case DTV_DVBT2_PLP_ID_LEGACY:
1522                 tvp->u.data = c->stream_id;
1523                 break;
1524
1525         /* ATSC-MH */
1526         case DTV_ATSCMH_FIC_VER:
1527                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1528                 break;
1529         case DTV_ATSCMH_PARADE_ID:
1530                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1531                 break;
1532         case DTV_ATSCMH_NOG:
1533                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1534                 break;
1535         case DTV_ATSCMH_TNOG:
1536                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1537                 break;
1538         case DTV_ATSCMH_SGN:
1539                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1540                 break;
1541         case DTV_ATSCMH_PRC:
1542                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1543                 break;
1544         case DTV_ATSCMH_RS_FRAME_MODE:
1545                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1546                 break;
1547         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1548                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1549                 break;
1550         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1551                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1552                 break;
1553         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1554                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1555                 break;
1556         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1557                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1558                 break;
1559         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1560                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1561                 break;
1562         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1563                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1564                 break;
1565         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1566                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1567                 break;
1568         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1569                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1570                 break;
1571
1572         case DTV_LNA:
1573                 tvp->u.data = c->lna;
1574                 break;
1575
1576         /* Fill quality measures */
1577         case DTV_STAT_SIGNAL_STRENGTH:
1578                 tvp->u.st = c->strength;
1579                 break;
1580         case DTV_STAT_CNR:
1581                 tvp->u.st = c->cnr;
1582                 break;
1583         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1584                 tvp->u.st = c->pre_bit_error;
1585                 break;
1586         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1587                 tvp->u.st = c->pre_bit_count;
1588                 break;
1589         case DTV_STAT_POST_ERROR_BIT_COUNT:
1590                 tvp->u.st = c->post_bit_error;
1591                 break;
1592         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1593                 tvp->u.st = c->post_bit_count;
1594                 break;
1595         case DTV_STAT_ERROR_BLOCK_COUNT:
1596                 tvp->u.st = c->block_error;
1597                 break;
1598         case DTV_STAT_TOTAL_BLOCK_COUNT:
1599                 tvp->u.st = c->block_count;
1600                 break;
1601         default:
1602                 dev_dbg(fe->dvb->device,
1603                         "%s: FE property %d doesn't exist\n",
1604                         __func__, tvp->cmd);
1605                 return -EINVAL;
1606         }
1607
1608         /* Allow the frontend to override outgoing properties */
1609         if (fe->ops.get_property) {
1610                 r = fe->ops.get_property(fe, tvp);
1611                 if (r < 0)
1612                         return r;
1613         }
1614
1615         dtv_property_dump(fe, tvp);
1616
1617         return 0;
1618 }
1619
1620 static int dtv_set_frontend(struct dvb_frontend *fe);
1621
1622 static bool is_dvbv3_delsys(u32 delsys)
1623 {
1624         bool status;
1625
1626         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1627                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1628
1629         return status;
1630 }
1631
1632 /**
1633  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1634  * @fe:                 struct frontend;
1635  * @delsys:                     DVBv5 type that will be used for emulation
1636  *
1637  * Provides emulation for delivery systems that are compatible with the old
1638  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1639  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1640  * parameters are compatible with DVB-S spec.
1641  */
1642 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1643 {
1644         int i;
1645         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1646
1647         c->delivery_system = delsys;
1648
1649         /*
1650          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1651          */
1652         if (c->delivery_system == SYS_ISDBT) {
1653                 dev_dbg(fe->dvb->device,
1654                         "%s: Using defaults for SYS_ISDBT\n",
1655                         __func__);
1656
1657                 if (!c->bandwidth_hz)
1658                         c->bandwidth_hz = 6000000;
1659
1660                 c->isdbt_partial_reception = 0;
1661                 c->isdbt_sb_mode = 0;
1662                 c->isdbt_sb_subchannel = 0;
1663                 c->isdbt_sb_segment_idx = 0;
1664                 c->isdbt_sb_segment_count = 0;
1665                 c->isdbt_layer_enabled = 7;
1666                 for (i = 0; i < 3; i++) {
1667                         c->layer[i].fec = FEC_AUTO;
1668                         c->layer[i].modulation = QAM_AUTO;
1669                         c->layer[i].interleaving = 0;
1670                         c->layer[i].segment_count = 0;
1671                 }
1672         }
1673         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1674                 __func__, c->delivery_system);
1675
1676         return 0;
1677 }
1678
1679 /**
1680  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1681  * @fe:                 frontend struct
1682  * @desired_system:     delivery system requested by the user
1683  *
1684  * A DVBv5 call know what's the desired system it wants. So, set it.
1685  *
1686  * There are, however, a few known issues with early DVBv5 applications that
1687  * are also handled by this logic:
1688  *
1689  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1690  *    This is an API violation, but, as we don't want to break userspace,
1691  *    convert it to the first supported delivery system.
1692  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1693  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1694  *    ISDB-T provided backward compat with DVB-T.
1695  */
1696 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1697                                      u32 desired_system)
1698 {
1699         int ncaps;
1700         u32 delsys = SYS_UNDEFINED;
1701         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1702         enum dvbv3_emulation_type type;
1703
1704         /*
1705          * It was reported that some old DVBv5 applications were
1706          * filling delivery_system with SYS_UNDEFINED. If this happens,
1707          * assume that the application wants to use the first supported
1708          * delivery system.
1709          */
1710         if (desired_system == SYS_UNDEFINED)
1711                 desired_system = fe->ops.delsys[0];
1712
1713         /*
1714          * This is a DVBv5 call. So, it likely knows the supported
1715          * delivery systems. So, check if the desired delivery system is
1716          * supported
1717          */
1718         ncaps = 0;
1719         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1720                 if (fe->ops.delsys[ncaps] == desired_system) {
1721                         c->delivery_system = desired_system;
1722                         dev_dbg(fe->dvb->device,
1723                                         "%s: Changing delivery system to %d\n",
1724                                         __func__, desired_system);
1725                         return 0;
1726                 }
1727                 ncaps++;
1728         }
1729
1730         /*
1731          * The requested delivery system isn't supported. Maybe userspace
1732          * is requesting a DVBv3 compatible delivery system.
1733          *
1734          * The emulation only works if the desired system is one of the
1735          * delivery systems supported by DVBv3 API
1736          */
1737         if (!is_dvbv3_delsys(desired_system)) {
1738                 dev_dbg(fe->dvb->device,
1739                         "%s: Delivery system %d not supported.\n",
1740                         __func__, desired_system);
1741                 return -EINVAL;
1742         }
1743
1744         type = dvbv3_type(desired_system);
1745
1746         /*
1747         * Get the last non-DVBv3 delivery system that has the same type
1748         * of the desired system
1749         */
1750         ncaps = 0;
1751         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1752                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1753                         delsys = fe->ops.delsys[ncaps];
1754                 ncaps++;
1755         }
1756
1757         /* There's nothing compatible with the desired delivery system */
1758         if (delsys == SYS_UNDEFINED) {
1759                 dev_dbg(fe->dvb->device,
1760                         "%s: Delivery system %d not supported on emulation mode.\n",
1761                         __func__, desired_system);
1762                 return -EINVAL;
1763         }
1764
1765         dev_dbg(fe->dvb->device,
1766                 "%s: Using delivery system %d emulated as if it were %d\n",
1767                 __func__, delsys, desired_system);
1768
1769         return emulate_delivery_system(fe, desired_system);
1770 }
1771
1772 /**
1773  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1774  * @fe: frontend struct
1775  *
1776  * A DVBv3 call doesn't know what's the desired system it wants. It also
1777  * doesn't allow to switch between different types. Due to that, userspace
1778  * should use DVBv5 instead.
1779  * However, in order to avoid breaking userspace API, limited backward
1780  * compatibility support is provided.
1781  *
1782  * There are some delivery systems that are incompatible with DVBv3 calls.
1783  *
1784  * This routine should work fine for frontends that support just one delivery
1785  * system.
1786  *
1787  * For frontends that support multiple frontends:
1788  * 1) It defaults to use the first supported delivery system. There's an
1789  *    userspace application that allows changing it at runtime;
1790  *
1791  * 2) If the current delivery system is not compatible with DVBv3, it gets
1792  *    the first one that it is compatible.
1793  *
1794  * NOTE: in order for this to work with applications like Kaffeine that
1795  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1796  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1797  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1798  *      to DVB-S.
1799  */
1800 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1801 {
1802         int ncaps;
1803         u32 delsys = SYS_UNDEFINED;
1804         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1805
1806         /* If not set yet, defaults to the first supported delivery system */
1807         if (c->delivery_system == SYS_UNDEFINED)
1808                 c->delivery_system = fe->ops.delsys[0];
1809
1810         /*
1811          * Trivial case: just use the current one, if it already a DVBv3
1812          * delivery system
1813          */
1814         if (is_dvbv3_delsys(c->delivery_system)) {
1815                 dev_dbg(fe->dvb->device,
1816                                 "%s: Using delivery system to %d\n",
1817                                 __func__, c->delivery_system);
1818                 return 0;
1819         }
1820
1821         /*
1822          * Seek for the first delivery system that it is compatible with a
1823          * DVBv3 standard
1824          */
1825         ncaps = 0;
1826         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1827                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1828                         delsys = fe->ops.delsys[ncaps];
1829                         break;
1830                 }
1831                 ncaps++;
1832         }
1833         if (delsys == SYS_UNDEFINED) {
1834                 dev_dbg(fe->dvb->device,
1835                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1836                         __func__);
1837                 return -EINVAL;
1838         }
1839         return emulate_delivery_system(fe, delsys);
1840 }
1841
1842 static int dtv_property_process_set(struct dvb_frontend *fe,
1843                                     struct dtv_property *tvp,
1844                                     struct file *file)
1845 {
1846         int r = 0;
1847         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1848
1849         /* Allow the frontend to validate incoming properties */
1850         if (fe->ops.set_property) {
1851                 r = fe->ops.set_property(fe, tvp);
1852                 if (r < 0)
1853                         return r;
1854         }
1855
1856         switch(tvp->cmd) {
1857         case DTV_CLEAR:
1858                 /*
1859                  * Reset a cache of data specific to the frontend here. This does
1860                  * not effect hardware.
1861                  */
1862                 dvb_frontend_clear_cache(fe);
1863                 break;
1864         case DTV_TUNE:
1865                 /* interpret the cache of data, build either a traditional frontend
1866                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1867                  * ioctl.
1868                  */
1869                 c->state = tvp->cmd;
1870                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1871                                 __func__);
1872
1873                 r = dtv_set_frontend(fe);
1874                 break;
1875         case DTV_FREQUENCY:
1876                 c->frequency = tvp->u.data;
1877                 break;
1878         case DTV_MODULATION:
1879                 c->modulation = tvp->u.data;
1880                 break;
1881         case DTV_BANDWIDTH_HZ:
1882                 c->bandwidth_hz = tvp->u.data;
1883                 break;
1884         case DTV_INVERSION:
1885                 c->inversion = tvp->u.data;
1886                 break;
1887         case DTV_SYMBOL_RATE:
1888                 c->symbol_rate = tvp->u.data;
1889                 break;
1890         case DTV_INNER_FEC:
1891                 c->fec_inner = tvp->u.data;
1892                 break;
1893         case DTV_PILOT:
1894                 c->pilot = tvp->u.data;
1895                 break;
1896         case DTV_ROLLOFF:
1897                 c->rolloff = tvp->u.data;
1898                 break;
1899         case DTV_DELIVERY_SYSTEM:
1900                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1901                 break;
1902         case DTV_VOLTAGE:
1903                 c->voltage = tvp->u.data;
1904                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1905                         (void *)c->voltage);
1906                 break;
1907         case DTV_TONE:
1908                 c->sectone = tvp->u.data;
1909                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1910                         (void *)c->sectone);
1911                 break;
1912         case DTV_CODE_RATE_HP:
1913                 c->code_rate_HP = tvp->u.data;
1914                 break;
1915         case DTV_CODE_RATE_LP:
1916                 c->code_rate_LP = tvp->u.data;
1917                 break;
1918         case DTV_GUARD_INTERVAL:
1919                 c->guard_interval = tvp->u.data;
1920                 break;
1921         case DTV_TRANSMISSION_MODE:
1922                 c->transmission_mode = tvp->u.data;
1923                 break;
1924         case DTV_HIERARCHY:
1925                 c->hierarchy = tvp->u.data;
1926                 break;
1927         case DTV_INTERLEAVING:
1928                 c->interleaving = tvp->u.data;
1929                 break;
1930
1931         /* ISDB-T Support here */
1932         case DTV_ISDBT_PARTIAL_RECEPTION:
1933                 c->isdbt_partial_reception = tvp->u.data;
1934                 break;
1935         case DTV_ISDBT_SOUND_BROADCASTING:
1936                 c->isdbt_sb_mode = tvp->u.data;
1937                 break;
1938         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1939                 c->isdbt_sb_subchannel = tvp->u.data;
1940                 break;
1941         case DTV_ISDBT_SB_SEGMENT_IDX:
1942                 c->isdbt_sb_segment_idx = tvp->u.data;
1943                 break;
1944         case DTV_ISDBT_SB_SEGMENT_COUNT:
1945                 c->isdbt_sb_segment_count = tvp->u.data;
1946                 break;
1947         case DTV_ISDBT_LAYER_ENABLED:
1948                 c->isdbt_layer_enabled = tvp->u.data;
1949                 break;
1950         case DTV_ISDBT_LAYERA_FEC:
1951                 c->layer[0].fec = tvp->u.data;
1952                 break;
1953         case DTV_ISDBT_LAYERA_MODULATION:
1954                 c->layer[0].modulation = tvp->u.data;
1955                 break;
1956         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1957                 c->layer[0].segment_count = tvp->u.data;
1958                 break;
1959         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1960                 c->layer[0].interleaving = tvp->u.data;
1961                 break;
1962         case DTV_ISDBT_LAYERB_FEC:
1963                 c->layer[1].fec = tvp->u.data;
1964                 break;
1965         case DTV_ISDBT_LAYERB_MODULATION:
1966                 c->layer[1].modulation = tvp->u.data;
1967                 break;
1968         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1969                 c->layer[1].segment_count = tvp->u.data;
1970                 break;
1971         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1972                 c->layer[1].interleaving = tvp->u.data;
1973                 break;
1974         case DTV_ISDBT_LAYERC_FEC:
1975                 c->layer[2].fec = tvp->u.data;
1976                 break;
1977         case DTV_ISDBT_LAYERC_MODULATION:
1978                 c->layer[2].modulation = tvp->u.data;
1979                 break;
1980         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1981                 c->layer[2].segment_count = tvp->u.data;
1982                 break;
1983         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1984                 c->layer[2].interleaving = tvp->u.data;
1985                 break;
1986
1987         /* Multistream support */
1988         case DTV_STREAM_ID:
1989         case DTV_DVBT2_PLP_ID_LEGACY:
1990                 c->stream_id = tvp->u.data;
1991                 break;
1992
1993         /* ATSC-MH */
1994         case DTV_ATSCMH_PARADE_ID:
1995                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1996                 break;
1997         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1998                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1999                 break;
2000
2001         case DTV_LNA:
2002                 c->lna = tvp->u.data;
2003                 if (fe->ops.set_lna)
2004                         r = fe->ops.set_lna(fe);
2005                 if (r < 0)
2006                         c->lna = LNA_AUTO;
2007                 break;
2008
2009         default:
2010                 return -EINVAL;
2011         }
2012
2013         return r;
2014 }
2015
2016 static int dvb_frontend_ioctl(struct file *file,
2017                         unsigned int cmd, void *parg)
2018 {
2019         struct dvb_device *dvbdev = file->private_data;
2020         struct dvb_frontend *fe = dvbdev->priv;
2021         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2022         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2023         int err = -EOPNOTSUPP;
2024
2025         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
2026         if (down_interruptible(&fepriv->sem))
2027                 return -ERESTARTSYS;
2028
2029         if (fe->exit != DVB_FE_NO_EXIT) {
2030                 up(&fepriv->sem);
2031                 return -ENODEV;
2032         }
2033
2034         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
2035             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
2036              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2037                 up(&fepriv->sem);
2038                 return -EPERM;
2039         }
2040
2041         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
2042                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
2043         else {
2044                 c->state = DTV_UNDEFINED;
2045                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
2046         }
2047
2048         up(&fepriv->sem);
2049         return err;
2050 }
2051
2052 static int dvb_frontend_ioctl_properties(struct file *file,
2053                         unsigned int cmd, void *parg)
2054 {
2055         struct dvb_device *dvbdev = file->private_data;
2056         struct dvb_frontend *fe = dvbdev->priv;
2057         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2058         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2059         int err = 0;
2060
2061         struct dtv_properties *tvps = parg;
2062         struct dtv_property *tvp = NULL;
2063         int i;
2064
2065         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2066
2067         if (cmd == FE_SET_PROPERTY) {
2068                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2069                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2070
2071                 /* Put an arbitrary limit on the number of messages that can
2072                  * be sent at once */
2073                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2074                         return -EINVAL;
2075
2076                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2077                 if (!tvp) {
2078                         err = -ENOMEM;
2079                         goto out;
2080                 }
2081
2082                 if (copy_from_user(tvp, (void __user *)tvps->props,
2083                                    tvps->num * sizeof(struct dtv_property))) {
2084                         err = -EFAULT;
2085                         goto out;
2086                 }
2087
2088                 for (i = 0; i < tvps->num; i++) {
2089                         err = dtv_property_process_set(fe, tvp + i, file);
2090                         if (err < 0)
2091                                 goto out;
2092                         (tvp + i)->result = err;
2093                 }
2094
2095                 if (c->state == DTV_TUNE)
2096                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
2097
2098         } else if (cmd == FE_GET_PROPERTY) {
2099                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2100                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2101
2102                 /* Put an arbitrary limit on the number of messages that can
2103                  * be sent at once */
2104                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2105                         return -EINVAL;
2106
2107                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2108                 if (!tvp) {
2109                         err = -ENOMEM;
2110                         goto out;
2111                 }
2112
2113                 if (copy_from_user(tvp, (void __user *)tvps->props,
2114                                    tvps->num * sizeof(struct dtv_property))) {
2115                         err = -EFAULT;
2116                         goto out;
2117                 }
2118
2119                 /*
2120                  * Fills the cache out struct with the cache contents, plus
2121                  * the data retrieved from get_frontend, if the frontend
2122                  * is not idle. Otherwise, returns the cached content
2123                  */
2124                 if (fepriv->state != FESTATE_IDLE) {
2125                         err = dtv_get_frontend(fe, NULL);
2126                         if (err < 0)
2127                                 goto out;
2128                 }
2129                 for (i = 0; i < tvps->num; i++) {
2130                         err = dtv_property_process_get(fe, c, tvp + i, file);
2131                         if (err < 0)
2132                                 goto out;
2133                         (tvp + i)->result = err;
2134                 }
2135
2136                 if (copy_to_user((void __user *)tvps->props, tvp,
2137                                  tvps->num * sizeof(struct dtv_property))) {
2138                         err = -EFAULT;
2139                         goto out;
2140                 }
2141
2142         } else
2143                 err = -EOPNOTSUPP;
2144
2145 out:
2146         kfree(tvp);
2147         return err;
2148 }
2149
2150 static int dtv_set_frontend(struct dvb_frontend *fe)
2151 {
2152         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2153         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2154         struct dvb_frontend_tune_settings fetunesettings;
2155         u32 rolloff = 0;
2156
2157         if (dvb_frontend_check_parameters(fe) < 0)
2158                 return -EINVAL;
2159
2160         /*
2161          * Initialize output parameters to match the values given by
2162          * the user. FE_SET_FRONTEND triggers an initial frontend event
2163          * with status = 0, which copies output parameters to userspace.
2164          */
2165         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2166
2167         /*
2168          * Be sure that the bandwidth will be filled for all
2169          * non-satellite systems, as tuners need to know what
2170          * low pass/Nyquist half filter should be applied, in
2171          * order to avoid inter-channel noise.
2172          *
2173          * ISDB-T and DVB-T/T2 already sets bandwidth.
2174          * ATSC and DVB-C don't set, so, the core should fill it.
2175          *
2176          * On DVB-C Annex A and C, the bandwidth is a function of
2177          * the roll-off and symbol rate. Annex B defines different
2178          * roll-off factors depending on the modulation. Fortunately,
2179          * Annex B is only used with 6MHz, so there's no need to
2180          * calculate it.
2181          *
2182          * While not officially supported, a side effect of handling it at
2183          * the cache level is that a program could retrieve the bandwidth
2184          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2185          */
2186         switch (c->delivery_system) {
2187         case SYS_ATSC:
2188         case SYS_DVBC_ANNEX_B:
2189                 c->bandwidth_hz = 6000000;
2190                 break;
2191         case SYS_DVBC_ANNEX_A:
2192                 rolloff = 115;
2193                 break;
2194         case SYS_DVBC_ANNEX_C:
2195                 rolloff = 113;
2196                 break;
2197         case SYS_DVBS:
2198         case SYS_TURBO:
2199         case SYS_ISDBS:
2200                 rolloff = 135;
2201                 break;
2202         case SYS_DVBS2:
2203                 switch (c->rolloff) {
2204                 case ROLLOFF_20:
2205                         rolloff = 120;
2206                         break;
2207                 case ROLLOFF_25:
2208                         rolloff = 125;
2209                         break;
2210                 default:
2211                 case ROLLOFF_35:
2212                         rolloff = 135;
2213                 }
2214                 break;
2215         default:
2216                 break;
2217         }
2218         if (rolloff)
2219                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
2220
2221         /* force auto frequency inversion if requested */
2222         if (dvb_force_auto_inversion)
2223                 c->inversion = INVERSION_AUTO;
2224
2225         /*
2226          * without hierarchical coding code_rate_LP is irrelevant,
2227          * so we tolerate the otherwise invalid FEC_NONE setting
2228          */
2229         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2230                 c->code_rate_LP = FEC_AUTO;
2231
2232         /* get frontend-specific tuning settings */
2233         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2234         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2235                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2236                 fepriv->max_drift = fetunesettings.max_drift;
2237                 fepriv->step_size = fetunesettings.step_size;
2238         } else {
2239                 /* default values */
2240                 switch (c->delivery_system) {
2241                 case SYS_DVBS:
2242                 case SYS_DVBS2:
2243                 case SYS_ISDBS:
2244                 case SYS_TURBO:
2245                 case SYS_DVBC_ANNEX_A:
2246                 case SYS_DVBC_ANNEX_C:
2247                         fepriv->min_delay = HZ / 20;
2248                         fepriv->step_size = c->symbol_rate / 16000;
2249                         fepriv->max_drift = c->symbol_rate / 2000;
2250                         break;
2251                 case SYS_DVBT:
2252                 case SYS_DVBT2:
2253                 case SYS_ISDBT:
2254                 case SYS_DTMB:
2255                         fepriv->min_delay = HZ / 20;
2256                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2257                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2258                         break;
2259                 default:
2260                         /*
2261                          * FIXME: This sounds wrong! if freqency_stepsize is
2262                          * defined by the frontend, why not use it???
2263                          */
2264                         fepriv->min_delay = HZ / 20;
2265                         fepriv->step_size = 0; /* no zigzag */
2266                         fepriv->max_drift = 0;
2267                         break;
2268                 }
2269         }
2270         if (dvb_override_tune_delay > 0)
2271                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2272
2273         fepriv->state = FESTATE_RETUNE;
2274
2275         /* Request the search algorithm to search */
2276         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2277
2278         dvb_frontend_clear_events(fe);
2279         dvb_frontend_add_event(fe, 0);
2280         dvb_frontend_wakeup(fe);
2281         fepriv->status = 0;
2282
2283         return 0;
2284 }
2285
2286
2287 static int dvb_frontend_ioctl_legacy(struct file *file,
2288                         unsigned int cmd, void *parg)
2289 {
2290         struct dvb_device *dvbdev = file->private_data;
2291         struct dvb_frontend *fe = dvbdev->priv;
2292         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2293         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2294         int err = -EOPNOTSUPP;
2295
2296         switch (cmd) {
2297         case FE_GET_INFO: {
2298                 struct dvb_frontend_info* info = parg;
2299
2300                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2301                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2302
2303                 /*
2304                  * Associate the 4 delivery systems supported by DVBv3
2305                  * API with their DVBv5 counterpart. For the other standards,
2306                  * use the closest type, assuming that it would hopefully
2307                  * work with a DVBv3 application.
2308                  * It should be noticed that, on multi-frontend devices with
2309                  * different types (terrestrial and cable, for example),
2310                  * a pure DVBv3 application won't be able to use all delivery
2311                  * systems. Yet, changing the DVBv5 cache to the other delivery
2312                  * system should be enough for making it work.
2313                  */
2314                 switch (dvbv3_type(c->delivery_system)) {
2315                 case DVBV3_QPSK:
2316                         info->type = FE_QPSK;
2317                         break;
2318                 case DVBV3_ATSC:
2319                         info->type = FE_ATSC;
2320                         break;
2321                 case DVBV3_QAM:
2322                         info->type = FE_QAM;
2323                         break;
2324                 case DVBV3_OFDM:
2325                         info->type = FE_OFDM;
2326                         break;
2327                 default:
2328                         dev_err(fe->dvb->device,
2329                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2330                                         __func__, c->delivery_system);
2331                         fe->ops.info.type = FE_OFDM;
2332                 }
2333                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2334                                  __func__, c->delivery_system, fe->ops.info.type);
2335
2336                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2337                  * do it, it is done for it. */
2338                 info->caps |= FE_CAN_INVERSION_AUTO;
2339                 err = 0;
2340                 break;
2341         }
2342
2343         case FE_READ_STATUS: {
2344                 fe_status_t* status = parg;
2345
2346                 /* if retune was requested but hasn't occurred yet, prevent
2347                  * that user get signal state from previous tuning */
2348                 if (fepriv->state == FESTATE_RETUNE ||
2349                     fepriv->state == FESTATE_ERROR) {
2350                         err=0;
2351                         *status = 0;
2352                         break;
2353                 }
2354
2355                 if (fe->ops.read_status)
2356                         err = fe->ops.read_status(fe, status);
2357                 break;
2358         }
2359
2360         case FE_READ_BER:
2361                 if (fe->ops.read_ber) {
2362                         if (fepriv->thread)
2363                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2364                         else
2365                                 err = -EAGAIN;
2366                 }
2367                 break;
2368
2369         case FE_READ_SIGNAL_STRENGTH:
2370                 if (fe->ops.read_signal_strength) {
2371                         if (fepriv->thread)
2372                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2373                         else
2374                                 err = -EAGAIN;
2375                 }
2376                 break;
2377
2378         case FE_READ_SNR:
2379                 if (fe->ops.read_snr) {
2380                         if (fepriv->thread)
2381                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2382                         else
2383                                 err = -EAGAIN;
2384                 }
2385                 break;
2386
2387         case FE_READ_UNCORRECTED_BLOCKS:
2388                 if (fe->ops.read_ucblocks) {
2389                         if (fepriv->thread)
2390                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2391                         else
2392                                 err = -EAGAIN;
2393                 }
2394                 break;
2395
2396         case FE_DISEQC_RESET_OVERLOAD:
2397                 if (fe->ops.diseqc_reset_overload) {
2398                         err = fe->ops.diseqc_reset_overload(fe);
2399                         fepriv->state = FESTATE_DISEQC;
2400                         fepriv->status = 0;
2401                 }
2402                 break;
2403
2404         case FE_DISEQC_SEND_MASTER_CMD:
2405                 if (fe->ops.diseqc_send_master_cmd) {
2406                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2407                         fepriv->state = FESTATE_DISEQC;
2408                         fepriv->status = 0;
2409                 }
2410                 break;
2411
2412         case FE_DISEQC_SEND_BURST:
2413                 if (fe->ops.diseqc_send_burst) {
2414                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2415                         fepriv->state = FESTATE_DISEQC;
2416                         fepriv->status = 0;
2417                 }
2418                 break;
2419
2420         case FE_SET_TONE:
2421                 if (fe->ops.set_tone) {
2422                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2423                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2424                         fepriv->state = FESTATE_DISEQC;
2425                         fepriv->status = 0;
2426                 }
2427                 break;
2428
2429         case FE_SET_VOLTAGE:
2430                 if (fe->ops.set_voltage) {
2431                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2432                         fepriv->voltage = (fe_sec_voltage_t) parg;
2433                         fepriv->state = FESTATE_DISEQC;
2434                         fepriv->status = 0;
2435                 }
2436                 break;
2437
2438         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2439                 if (fe->ops.dishnetwork_send_legacy_command) {
2440                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2441                         fepriv->state = FESTATE_DISEQC;
2442                         fepriv->status = 0;
2443                 } else if (fe->ops.set_voltage) {
2444                         /*
2445                          * NOTE: This is a fallback condition.  Some frontends
2446                          * (stv0299 for instance) take longer than 8msec to
2447                          * respond to a set_voltage command.  Those switches
2448                          * need custom routines to switch properly.  For all
2449                          * other frontends, the following should work ok.
2450                          * Dish network legacy switches (as used by Dish500)
2451                          * are controlled by sending 9-bit command words
2452                          * spaced 8msec apart.
2453                          * the actual command word is switch/port dependent
2454                          * so it is up to the userspace application to send
2455                          * the right command.
2456                          * The command must always start with a '0' after
2457                          * initialization, so parg is 8 bits and does not
2458                          * include the initialization or start bit
2459                          */
2460                         unsigned long swcmd = ((unsigned long) parg) << 1;
2461                         struct timeval nexttime;
2462                         struct timeval tv[10];
2463                         int i;
2464                         u8 last = 1;
2465                         if (dvb_frontend_debug)
2466                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2467                         do_gettimeofday(&nexttime);
2468                         if (dvb_frontend_debug)
2469                                 tv[0] = nexttime;
2470                         /* before sending a command, initialize by sending
2471                          * a 32ms 18V to the switch
2472                          */
2473                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2474                         dvb_frontend_sleep_until(&nexttime, 32000);
2475
2476                         for (i = 0; i < 9; i++) {
2477                                 if (dvb_frontend_debug)
2478                                         do_gettimeofday(&tv[i + 1]);
2479                                 if ((swcmd & 0x01) != last) {
2480                                         /* set voltage to (last ? 13V : 18V) */
2481                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2482                                         last = (last) ? 0 : 1;
2483                                 }
2484                                 swcmd = swcmd >> 1;
2485                                 if (i != 8)
2486                                         dvb_frontend_sleep_until(&nexttime, 8000);
2487                         }
2488                         if (dvb_frontend_debug) {
2489                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2490                                         __func__, fe->dvb->num);
2491                                 for (i = 1; i < 10; i++)
2492                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2493                         }
2494                         err = 0;
2495                         fepriv->state = FESTATE_DISEQC;
2496                         fepriv->status = 0;
2497                 }
2498                 break;
2499
2500         case FE_DISEQC_RECV_SLAVE_REPLY:
2501                 if (fe->ops.diseqc_recv_slave_reply)
2502                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2503                 break;
2504
2505         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2506                 if (fe->ops.enable_high_lnb_voltage)
2507                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2508                 break;
2509
2510         case FE_SET_FRONTEND:
2511                 err = dvbv3_set_delivery_system(fe);
2512                 if (err)
2513                         break;
2514
2515                 err = dtv_property_cache_sync(fe, c, parg);
2516                 if (err)
2517                         break;
2518                 err = dtv_set_frontend(fe);
2519                 break;
2520         case FE_GET_EVENT:
2521                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2522                 break;
2523
2524         case FE_GET_FRONTEND:
2525                 err = dtv_get_frontend(fe, parg);
2526                 break;
2527
2528         case FE_SET_FRONTEND_TUNE_MODE:
2529                 fepriv->tune_mode_flags = (unsigned long) parg;
2530                 err = 0;
2531                 break;
2532         }
2533
2534         return err;
2535 }
2536
2537
2538 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2539 {
2540         struct dvb_device *dvbdev = file->private_data;
2541         struct dvb_frontend *fe = dvbdev->priv;
2542         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2543
2544         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2545
2546         poll_wait (file, &fepriv->events.wait_queue, wait);
2547
2548         if (fepriv->events.eventw != fepriv->events.eventr)
2549                 return (POLLIN | POLLRDNORM | POLLPRI);
2550
2551         return 0;
2552 }
2553
2554 static int dvb_frontend_open(struct inode *inode, struct file *file)
2555 {
2556         struct dvb_device *dvbdev = file->private_data;
2557         struct dvb_frontend *fe = dvbdev->priv;
2558         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2559         struct dvb_adapter *adapter = fe->dvb;
2560         int ret;
2561
2562         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2563         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2564                 return -ENODEV;
2565
2566         if (adapter->mfe_shared) {
2567                 mutex_lock (&adapter->mfe_lock);
2568
2569                 if (adapter->mfe_dvbdev == NULL)
2570                         adapter->mfe_dvbdev = dvbdev;
2571
2572                 else if (adapter->mfe_dvbdev != dvbdev) {
2573                         struct dvb_device
2574                                 *mfedev = adapter->mfe_dvbdev;
2575                         struct dvb_frontend
2576                                 *mfe = mfedev->priv;
2577                         struct dvb_frontend_private
2578                                 *mfepriv = mfe->frontend_priv;
2579                         int mferetry = (dvb_mfe_wait_time << 1);
2580
2581                         mutex_unlock (&adapter->mfe_lock);
2582                         while (mferetry-- && (mfedev->users != -1 ||
2583                                         mfepriv->thread != NULL)) {
2584                                 if(msleep_interruptible(500)) {
2585                                         if(signal_pending(current))
2586                                                 return -EINTR;
2587                                 }
2588                         }
2589
2590                         mutex_lock (&adapter->mfe_lock);
2591                         if(adapter->mfe_dvbdev != dvbdev) {
2592                                 mfedev = adapter->mfe_dvbdev;
2593                                 mfe = mfedev->priv;
2594                                 mfepriv = mfe->frontend_priv;
2595                                 if (mfedev->users != -1 ||
2596                                                 mfepriv->thread != NULL) {
2597                                         mutex_unlock (&adapter->mfe_lock);
2598                                         return -EBUSY;
2599                                 }
2600                                 adapter->mfe_dvbdev = dvbdev;
2601                         }
2602                 }
2603         }
2604
2605         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2606                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2607                         goto err0;
2608
2609                 /* If we took control of the bus, we need to force
2610                    reinitialization.  This is because many ts_bus_ctrl()
2611                    functions strobe the RESET pin on the demod, and if the
2612                    frontend thread already exists then the dvb_init() routine
2613                    won't get called (which is what usually does initial
2614                    register configuration). */
2615                 fepriv->reinitialise = 1;
2616         }
2617
2618         if ((ret = dvb_generic_open (inode, file)) < 0)
2619                 goto err1;
2620
2621         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2622                 /* normal tune mode when opened R/W */
2623                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2624                 fepriv->tone = -1;
2625                 fepriv->voltage = -1;
2626
2627                 ret = dvb_frontend_start (fe);
2628                 if (ret)
2629                         goto err2;
2630
2631                 /*  empty event queue */
2632                 fepriv->events.eventr = fepriv->events.eventw = 0;
2633         }
2634
2635         if (adapter->mfe_shared)
2636                 mutex_unlock (&adapter->mfe_lock);
2637         return ret;
2638
2639 err2:
2640         dvb_generic_release(inode, file);
2641 err1:
2642         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2643                 fe->ops.ts_bus_ctrl(fe, 0);
2644 err0:
2645         if (adapter->mfe_shared)
2646                 mutex_unlock (&adapter->mfe_lock);
2647         return ret;
2648 }
2649
2650 static int dvb_frontend_release(struct inode *inode, struct file *file)
2651 {
2652         struct dvb_device *dvbdev = file->private_data;
2653         struct dvb_frontend *fe = dvbdev->priv;
2654         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2655         int ret;
2656
2657         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2658
2659         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2660                 fepriv->release_jiffies = jiffies;
2661                 mb();
2662         }
2663
2664         ret = dvb_generic_release (inode, file);
2665
2666         if (dvbdev->users == -1) {
2667                 wake_up(&fepriv->wait_queue);
2668                 if (fe->exit != DVB_FE_NO_EXIT)
2669                         wake_up(&dvbdev->wait_queue);
2670                 if (fe->ops.ts_bus_ctrl)
2671                         fe->ops.ts_bus_ctrl(fe, 0);
2672         }
2673
2674         return ret;
2675 }
2676
2677 static const struct file_operations dvb_frontend_fops = {
2678         .owner          = THIS_MODULE,
2679         .unlocked_ioctl = dvb_generic_ioctl,
2680         .poll           = dvb_frontend_poll,
2681         .open           = dvb_frontend_open,
2682         .release        = dvb_frontend_release,
2683         .llseek         = noop_llseek,
2684 };
2685
2686 int dvb_frontend_suspend(struct dvb_frontend *fe)
2687 {
2688         int ret = 0;
2689
2690         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2691                         fe->id);
2692
2693         if (fe->ops.tuner_ops.suspend)
2694                 ret = fe->ops.tuner_ops.suspend(fe);
2695         else if (fe->ops.tuner_ops.sleep)
2696                 ret = fe->ops.tuner_ops.sleep(fe);
2697
2698         if (fe->ops.sleep)
2699                 ret = fe->ops.sleep(fe);
2700
2701         return ret;
2702 }
2703 EXPORT_SYMBOL(dvb_frontend_suspend);
2704
2705 int dvb_frontend_resume(struct dvb_frontend *fe)
2706 {
2707         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2708         int ret = 0;
2709
2710         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2711                         fe->id);
2712
2713         fe->exit = DVB_FE_DEVICE_RESUME;
2714         if (fe->ops.init)
2715                 ret = fe->ops.init(fe);
2716
2717         if (fe->ops.tuner_ops.resume)
2718                 ret = fe->ops.tuner_ops.resume(fe);
2719         else if (fe->ops.tuner_ops.init)
2720                 ret = fe->ops.tuner_ops.init(fe);
2721
2722         fe->exit = DVB_FE_NO_EXIT;
2723         fepriv->state = FESTATE_RETUNE;
2724         dvb_frontend_wakeup(fe);
2725
2726         return ret;
2727 }
2728 EXPORT_SYMBOL(dvb_frontend_resume);
2729
2730 int dvb_register_frontend(struct dvb_adapter* dvb,
2731                           struct dvb_frontend* fe)
2732 {
2733         struct dvb_frontend_private *fepriv;
2734         const struct dvb_device dvbdev_template = {
2735                 .users = ~0,
2736                 .writers = 1,
2737                 .readers = (~0)-1,
2738                 .fops = &dvb_frontend_fops,
2739 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2740                 .name = fe->ops.info.name,
2741 #endif
2742                 .kernel_ioctl = dvb_frontend_ioctl
2743         };
2744
2745         dev_dbg(dvb->device, "%s:\n", __func__);
2746
2747         if (mutex_lock_interruptible(&frontend_mutex))
2748                 return -ERESTARTSYS;
2749
2750         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2751         if (fe->frontend_priv == NULL) {
2752                 mutex_unlock(&frontend_mutex);
2753                 return -ENOMEM;
2754         }
2755         fepriv = fe->frontend_priv;
2756
2757         sema_init(&fepriv->sem, 1);
2758         init_waitqueue_head (&fepriv->wait_queue);
2759         init_waitqueue_head (&fepriv->events.wait_queue);
2760         mutex_init(&fepriv->events.mtx);
2761         fe->dvb = dvb;
2762         fepriv->inversion = INVERSION_OFF;
2763
2764         dev_info(fe->dvb->device,
2765                         "DVB: registering adapter %i frontend %i (%s)...\n",
2766                         fe->dvb->num, fe->id, fe->ops.info.name);
2767
2768         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2769                              fe, DVB_DEVICE_FRONTEND);
2770
2771         /*
2772          * Initialize the cache to the proper values according with the
2773          * first supported delivery system (ops->delsys[0])
2774          */
2775
2776         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2777         dvb_frontend_clear_cache(fe);
2778
2779         mutex_unlock(&frontend_mutex);
2780         return 0;
2781 }
2782 EXPORT_SYMBOL(dvb_register_frontend);
2783
2784 int dvb_unregister_frontend(struct dvb_frontend* fe)
2785 {
2786         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2787         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2788
2789         mutex_lock(&frontend_mutex);
2790         dvb_frontend_stop (fe);
2791         mutex_unlock(&frontend_mutex);
2792
2793         if (fepriv->dvbdev->users < -1)
2794                 wait_event(fepriv->dvbdev->wait_queue,
2795                                 fepriv->dvbdev->users==-1);
2796
2797         mutex_lock(&frontend_mutex);
2798         dvb_unregister_device (fepriv->dvbdev);
2799
2800         /* fe is invalid now */
2801         kfree(fepriv);
2802         mutex_unlock(&frontend_mutex);
2803         return 0;
2804 }
2805 EXPORT_SYMBOL(dvb_unregister_frontend);
2806
2807 #ifdef CONFIG_MEDIA_ATTACH
2808 void dvb_frontend_detach(struct dvb_frontend* fe)
2809 {
2810         void *ptr;
2811
2812         if (fe->ops.release_sec) {
2813                 fe->ops.release_sec(fe);
2814                 dvb_detach(fe->ops.release_sec);
2815         }
2816         if (fe->ops.tuner_ops.release) {
2817                 fe->ops.tuner_ops.release(fe);
2818                 dvb_detach(fe->ops.tuner_ops.release);
2819         }
2820         if (fe->ops.analog_ops.release) {
2821                 fe->ops.analog_ops.release(fe);
2822                 dvb_detach(fe->ops.analog_ops.release);
2823         }
2824         ptr = (void*)fe->ops.release;
2825         if (ptr) {
2826                 fe->ops.release(fe);
2827                 dvb_detach(ptr);
2828         }
2829 }
2830 #else
2831 void dvb_frontend_detach(struct dvb_frontend* fe)
2832 {
2833         if (fe->ops.release_sec)
2834                 fe->ops.release_sec(fe);
2835         if (fe->ops.tuner_ops.release)
2836                 fe->ops.tuner_ops.release(fe);
2837         if (fe->ops.analog_ops.release)
2838                 fe->ops.analog_ops.release(fe);
2839         if (fe->ops.release)
2840                 fe->ops.release(fe);
2841 }
2842 #endif
2843 EXPORT_SYMBOL(dvb_frontend_detach);