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         int ret;
 696
 697         bool re_tune = false;
 698         bool semheld = false;
 699
 700         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 701
 702         fepriv->check_wrapped = 0;
 703         fepriv->quality = 0;
 704         fepriv->delay = 3*HZ;
 705         fepriv->status = 0;
 706         fepriv->wakeup = 0;
 707         fepriv->reinitialise = 0;
 708
 709 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 710         ret = dvb_enable_media_tuner(fe);
 711         if (ret) {
 712                 /* FIXME: return an error if it fails */
 713                 dev_info(fe->dvb->device,
 714                         "proceeding with FE task\n");
 715         } else {
 716                 ret = media_entity_pipeline_start(fepriv->pipe_start_entity,
 717                                                   &fepriv->pipe);
 718                 if (ret)
 719                         return ret;
 720         }
 721 #endif
 722
 723         dvb_frontend_init(fe);
 724
 725         set_freezable();
 726         while (1) {
 727                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 728 restart:
 729                 wait_event_interruptible_timeout(fepriv->wait_queue,
 730                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 731                                 || freezing(current),
 732                         fepriv->delay);
 733
 734                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 735                         /* got signal or quitting */
 736                         if (!down_interruptible(&fepriv->sem))
 737                                 semheld = true;
 738                         fe->exit = DVB_FE_NORMAL_EXIT;
 739                         break;
 740                 }
 741
 742                 if (try_to_freeze())
 743                         goto restart;
 744
 745                 if (down_interruptible(&fepriv->sem))
 746                         break;
 747
 748                 if (fepriv->reinitialise) {
 749                         dvb_frontend_init(fe);
 750                         if (fe->ops.set_tone && fepriv->tone != -1)
 751                                 fe->ops.set_tone(fe, fepriv->tone);
 752                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 753                                 fe->ops.set_voltage(fe, fepriv->voltage);
 754                         fepriv->reinitialise = 0;
 755                 }
 756
 757                 /* do an iteration of the tuning loop */
 758                 if (fe->ops.get_frontend_algo) {
 759                         algo = fe->ops.get_frontend_algo(fe);
 760                         switch (algo) {
 761                         case DVBFE_ALGO_HW:
 762                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 763
 764                                 if (fepriv->state & FESTATE_RETUNE) {
 765                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 766                                         re_tune = true;
 767                                         fepriv->state = FESTATE_TUNED;
 768                                 } else {
 769                                         re_tune = false;
 770                                 }
 771
 772                                 if (fe->ops.tune)
 773                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 774
 775                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 776                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 777                                         dvb_frontend_add_event(fe, s);
 778                                         fepriv->status = s;
 779                                 }
 780                                 break;
 781                         case DVBFE_ALGO_SW:
 782                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 783                                 dvb_frontend_swzigzag(fe);
 784                                 break;
 785                         case DVBFE_ALGO_CUSTOM:
 786                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 787                                 if (fepriv->state & FESTATE_RETUNE) {
 788                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 789                                         fepriv->state = FESTATE_TUNED;
 790                                 }
 791                                 /* Case where we are going to search for a carrier
 792                                  * User asked us to retune again for some reason, possibly
 793                                  * requesting a search with a new set of parameters
 794                                  */
 795                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 796                                         if (fe->ops.search) {
 797                                                 fepriv->algo_status = fe->ops.search(fe);
 798                                                 /* We did do a search as was requested, the flags are
 799                                                  * now unset as well and has the flags wrt to search.
 800                                                  */
 801                                         } else {
 802                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 803                                         }
 804                                 }
 805                                 /* Track the carrier if the search was successful */
 806                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 807                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 808                                         fepriv->delay = HZ / 2;
 809                                 }
 810                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
 811                                 fe->ops.read_status(fe, &s);
 812                                 if (s != fepriv->status) {
 813                                         dvb_frontend_add_event(fe, s); /* update event list */
 814                                         fepriv->status = s;
 815                                         if (!(s & FE_HAS_LOCK)) {
 816                                                 fepriv->delay = HZ / 10;
 817                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 818                                         } else {
 819                                                 fepriv->delay = 60 * HZ;
 820                                         }
 821                                 }
 822                                 break;
 823                         default:
 824                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 825                                 break;
 826                         }
 827                 } else {
 828                         dvb_frontend_swzigzag(fe);
 829                 }
 830         }
 831
 832 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
 833         media_entity_pipeline_stop(fepriv->pipe_start_entity);
 834         fepriv->pipe_start_entity = NULL;
 835 #endif
 836
 837         if (dvb_powerdown_on_sleep) {
 838                 if (fe->ops.set_voltage)
 839                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 840                 if (fe->ops.tuner_ops.sleep) {
 841                         if (fe->ops.i2c_gate_ctrl)
 842                                 fe->ops.i2c_gate_ctrl(fe, 1);
 843                         fe->ops.tuner_ops.sleep(fe);
 844                         if (fe->ops.i2c_gate_ctrl)
 845                                 fe->ops.i2c_gate_ctrl(fe, 0);
 846                 }
 847                 if (fe->ops.sleep)
 848                         fe->ops.sleep(fe);
 849         }
 850
 851         fepriv->thread = NULL;
 852         if (kthread_should_stop())
 853                 fe->exit = DVB_FE_DEVICE_REMOVED;
 854         else
 855                 fe->exit = DVB_FE_NO_EXIT;
 856         mb();
 857
 858         if (semheld)
 859                 up(&fepriv->sem);
 860         dvb_frontend_wakeup(fe);
 861         return 0;
 862 }
 863
 864 static void dvb_frontend_stop(struct dvb_frontend *fe)
 865 {
 866         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 867
 868         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 869
 870         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 871                 fe->exit = DVB_FE_NORMAL_EXIT;
 872         mb();
 873
 874         if (!fepriv->thread)
 875                 return;
 876
 877         kthread_stop(fepriv->thread);
 878
 879         sema_init(&fepriv->sem, 1);
 880         fepriv->state = FESTATE_IDLE;
 881
 882         /* paranoia check in case a signal arrived */
 883         if (fepriv->thread)
 884                 dev_warn(fe->dvb->device,
 885                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 886                                 fepriv->thread);
 887 }
 888
 889 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 890 {
 891         return ((curtime.tv_usec < lasttime.tv_usec) ?
 892                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 893                 curtime.tv_usec - lasttime.tv_usec);
 894 }
 895 EXPORT_SYMBOL(timeval_usec_diff);
 896
 897 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 898 {
 899         curtime->tv_usec += add_usec;
 900         if (curtime->tv_usec >= 1000000) {
 901                 curtime->tv_usec -= 1000000;
 902                 curtime->tv_sec++;
 903         }
 904 }
 905
 906 /*
 907  * Sleep until gettimeofday() > waketime + add_usec
 908  * This needs to be as precise as possible, but as the delay is
 909  * usually between 2ms and 32ms, it is done using a scheduled msleep
 910  * followed by usleep (normally a busy-wait loop) for the remainder
 911  */
 912 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 913 {
 914         struct timeval lasttime;
 915         s32 delta, newdelta;
 916
 917         timeval_usec_add(waketime, add_usec);
 918
 919         do_gettimeofday(&lasttime);
 920         delta = timeval_usec_diff(lasttime, *waketime);
 921         if (delta > 2500) {
 922                 msleep((delta - 1500) / 1000);
 923                 do_gettimeofday(&lasttime);
 924                 newdelta = timeval_usec_diff(lasttime, *waketime);
 925                 delta = (newdelta > delta) ? 0 : newdelta;
 926         }
 927         if (delta > 0)
 928                 udelay(delta);
 929 }
 930 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 931
 932 static int dvb_frontend_start(struct dvb_frontend *fe)
 933 {
 934         int ret;
 935         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 936         struct task_struct *fe_thread;
 937
 938         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 939
 940         if (fepriv->thread) {
 941                 if (fe->exit == DVB_FE_NO_EXIT)
 942                         return 0;
 943                 else
 944                         dvb_frontend_stop (fe);
 945         }
 946
 947         if (signal_pending(current))
 948                 return -EINTR;
 949         if (down_interruptible (&fepriv->sem))
 950                 return -EINTR;
 951
 952         fepriv->state = FESTATE_IDLE;
 953         fe->exit = DVB_FE_NO_EXIT;
 954         fepriv->thread = NULL;
 955         mb();
 956
 957         fe_thread = kthread_run(dvb_frontend_thread, fe,
 958                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 959         if (IS_ERR(fe_thread)) {
 960                 ret = PTR_ERR(fe_thread);
 961                 dev_warn(fe->dvb->device,
 962                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 963                                 ret);
 964                 up(&fepriv->sem);
 965                 return ret;
 966         }
 967         fepriv->thread = fe_thread;
 968         return 0;
 969 }
 970
 971 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 972                                         u32 *freq_min, u32 *freq_max)
 973 {
 974         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 975
 976         if (fe->ops.info.frequency_max == 0)
 977                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 978         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 979                 *freq_max = fe->ops.info.frequency_max;
 980         else
 981                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 982
 983         if (*freq_min == 0 || *freq_max == 0)
 984                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 985                                 fe->dvb->num, fe->id);
 986 }
 987
 988 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 989 {
 990         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 991         u32 freq_min;
 992         u32 freq_max;
 993
 994         /* range check: frequency */
 995         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 996         if ((freq_min && c->frequency < freq_min) ||
 997             (freq_max && c->frequency > freq_max)) {
 998                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 999                                 fe->dvb->num, fe->id, c->frequency,
1000                                 freq_min, freq_max);
1001                 return -EINVAL;
1002         }
1003
1004         /* range check: symbol rate */
1005         switch (c->delivery_system) {
1006         case SYS_DVBS:
1007         case SYS_DVBS2:
1008         case SYS_TURBO:
1009         case SYS_DVBC_ANNEX_A:
1010         case SYS_DVBC_ANNEX_C:
1011                 if ((fe->ops.info.symbol_rate_min &&
1012                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
1013                     (fe->ops.info.symbol_rate_max &&
1014                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
1015                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
1016                                         fe->dvb->num, fe->id, c->symbol_rate,
1017                                         fe->ops.info.symbol_rate_min,
1018                                         fe->ops.info.symbol_rate_max);
1019                         return -EINVAL;
1020                 }
1021         default:
1022                 break;
1023         }
1024
1025         return 0;
1026 }
1027
1028 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
1029 {
1030         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1031         int i;
1032         u32 delsys;
1033
1034         delsys = c->delivery_system;
1035         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
1036         c->delivery_system = delsys;
1037
1038         c->state = DTV_CLEAR;
1039
1040         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1041                         __func__, c->delivery_system);
1042
1043         c->transmission_mode = TRANSMISSION_MODE_AUTO;
1044         c->bandwidth_hz = 0;    /* AUTO */
1045         c->guard_interval = GUARD_INTERVAL_AUTO;
1046         c->hierarchy = HIERARCHY_AUTO;
1047         c->symbol_rate = 0;
1048         c->code_rate_HP = FEC_AUTO;
1049         c->code_rate_LP = FEC_AUTO;
1050         c->fec_inner = FEC_AUTO;
1051         c->rolloff = ROLLOFF_AUTO;
1052         c->voltage = SEC_VOLTAGE_OFF;
1053         c->sectone = SEC_TONE_OFF;
1054         c->pilot = PILOT_AUTO;
1055
1056         c->isdbt_partial_reception = 0;
1057         c->isdbt_sb_mode = 0;
1058         c->isdbt_sb_subchannel = 0;
1059         c->isdbt_sb_segment_idx = 0;
1060         c->isdbt_sb_segment_count = 0;
1061         c->isdbt_layer_enabled = 0;
1062         for (i = 0; i < 3; i++) {
1063                 c->layer[i].fec = FEC_AUTO;
1064                 c->layer[i].modulation = QAM_AUTO;
1065                 c->layer[i].interleaving = 0;
1066                 c->layer[i].segment_count = 0;
1067         }
1068
1069         c->stream_id = NO_STREAM_ID_FILTER;
1070
1071         switch (c->delivery_system) {
1072         case SYS_DVBS:
1073         case SYS_DVBS2:
1074         case SYS_TURBO:
1075                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1076                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1077                 break;
1078         case SYS_ATSC:
1079                 c->modulation = VSB_8;
1080                 break;
1081         case SYS_ISDBS:
1082                 c->symbol_rate = 28860000;
1083                 c->rolloff = ROLLOFF_35;
1084                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1085                 break;
1086         default:
1087                 c->modulation = QAM_AUTO;
1088                 break;
1089         }
1090
1091         c->lna = LNA_AUTO;
1092
1093         return 0;
1094 }
1095
1096 #define _DTV_CMD(n, s, b) \
1097 [n] = { \
1098         .name = #n, \
1099         .cmd  = n, \
1100         .set  = s,\
1101         .buffer = b \
1102 }
1103
1104 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1105         _DTV_CMD(DTV_TUNE, 1, 0),
1106         _DTV_CMD(DTV_CLEAR, 1, 0),
1107
1108         /* Set */
1109         _DTV_CMD(DTV_FREQUENCY, 1, 0),
1110         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1111         _DTV_CMD(DTV_MODULATION, 1, 0),
1112         _DTV_CMD(DTV_INVERSION, 1, 0),
1113         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1114         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1115         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1116         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1117         _DTV_CMD(DTV_TONE, 1, 0),
1118         _DTV_CMD(DTV_PILOT, 1, 0),
1119         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1120         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1121         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1122         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1123         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1124         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1125         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1126         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1127
1128         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1129         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1130         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1131         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1132         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1133         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1134         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1135         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1136         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1137         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1138         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1139         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1140         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1141         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1142         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1143         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1144         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1145         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1146
1147         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1148         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1149         _DTV_CMD(DTV_LNA, 1, 0),
1150
1151         /* Get */
1152         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1153         _DTV_CMD(DTV_API_VERSION, 0, 0),
1154
1155         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1156
1157         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1158         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1159
1160         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1161         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1162         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1163         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1164         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1165         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1166         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1167         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1168         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1169         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1170         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1171         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1172         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1173
1174         /* Statistics API */
1175         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1176         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1177         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1178         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1179         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1180         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1181         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1182         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1183 };
1184
1185 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1186 {
1187         int i;
1188
1189         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1190                 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1191                                 __func__, tvp->cmd);
1192                 return;
1193         }
1194
1195         dev_dbg(fe->dvb->device, "%s: tvp.cmd    = 0x%08x (%s)\n", __func__,
1196                         tvp->cmd, dtv_cmds[tvp->cmd].name);
1197
1198         if (dtv_cmds[tvp->cmd].buffer) {
1199                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1200                         __func__, tvp->u.buffer.len);
1201
1202                 for(i = 0; i < tvp->u.buffer.len; i++)
1203                         dev_dbg(fe->dvb->device,
1204                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1205                                         __func__, i, tvp->u.buffer.data[i]);
1206         } else {
1207                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1208                                 tvp->u.data);
1209         }
1210 }
1211
1212 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1213  * drivers can use a single set_frontend tuning function, regardless of whether
1214  * it's being used for the legacy or new API, reducing code and complexity.
1215  */
1216 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1217                                    struct dtv_frontend_properties *c,
1218                                    const struct dvb_frontend_parameters *p)
1219 {
1220         c->frequency = p->frequency;
1221         c->inversion = p->inversion;
1222
1223         switch (dvbv3_type(c->delivery_system)) {
1224         case DVBV3_QPSK:
1225                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1226                 c->symbol_rate = p->u.qpsk.symbol_rate;
1227                 c->fec_inner = p->u.qpsk.fec_inner;
1228                 break;
1229         case DVBV3_QAM:
1230                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1231                 c->symbol_rate = p->u.qam.symbol_rate;
1232                 c->fec_inner = p->u.qam.fec_inner;
1233                 c->modulation = p->u.qam.modulation;
1234                 break;
1235         case DVBV3_OFDM:
1236                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1237
1238                 switch (p->u.ofdm.bandwidth) {
1239                 case BANDWIDTH_10_MHZ:
1240                         c->bandwidth_hz = 10000000;
1241                         break;
1242                 case BANDWIDTH_8_MHZ:
1243                         c->bandwidth_hz = 8000000;
1244                         break;
1245                 case BANDWIDTH_7_MHZ:
1246                         c->bandwidth_hz = 7000000;
1247                         break;
1248                 case BANDWIDTH_6_MHZ:
1249                         c->bandwidth_hz = 6000000;
1250                         break;
1251                 case BANDWIDTH_5_MHZ:
1252                         c->bandwidth_hz = 5000000;
1253                         break;
1254                 case BANDWIDTH_1_712_MHZ:
1255                         c->bandwidth_hz = 1712000;
1256                         break;
1257                 case BANDWIDTH_AUTO:
1258                         c->bandwidth_hz = 0;
1259                 }
1260
1261                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1262                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1263                 c->modulation = p->u.ofdm.constellation;
1264                 c->transmission_mode = p->u.ofdm.transmission_mode;
1265                 c->guard_interval = p->u.ofdm.guard_interval;
1266                 c->hierarchy = p->u.ofdm.hierarchy_information;
1267                 break;
1268         case DVBV3_ATSC:
1269                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1270                 c->modulation = p->u.vsb.modulation;
1271                 if (c->delivery_system == SYS_ATSCMH)
1272                         break;
1273                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1274                         c->delivery_system = SYS_ATSC;
1275                 else
1276                         c->delivery_system = SYS_DVBC_ANNEX_B;
1277                 break;
1278         case DVBV3_UNKNOWN:
1279                 dev_err(fe->dvb->device,
1280                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1281                                 __func__, c->delivery_system);
1282                 return -EINVAL;
1283         }
1284
1285         return 0;
1286 }
1287
1288 /* Ensure the cached values are set correctly in the frontend
1289  * legacy tuning structures, for the advanced tuning API.
1290  */
1291 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1292                                             struct dvb_frontend_parameters *p)
1293 {
1294         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1295
1296         p->frequency = c->frequency;
1297         p->inversion = c->inversion;
1298
1299         switch (dvbv3_type(c->delivery_system)) {
1300         case DVBV3_UNKNOWN:
1301                 dev_err(fe->dvb->device,
1302                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1303                                 __func__, c->delivery_system);
1304                 return -EINVAL;
1305         case DVBV3_QPSK:
1306                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1307                 p->u.qpsk.symbol_rate = c->symbol_rate;
1308                 p->u.qpsk.fec_inner = c->fec_inner;
1309                 break;
1310         case DVBV3_QAM:
1311                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1312                 p->u.qam.symbol_rate = c->symbol_rate;
1313                 p->u.qam.fec_inner = c->fec_inner;
1314                 p->u.qam.modulation = c->modulation;
1315                 break;
1316         case DVBV3_OFDM:
1317                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1318                 switch (c->bandwidth_hz) {
1319                 case 10000000:
1320                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1321                         break;
1322                 case 8000000:
1323                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1324                         break;
1325                 case 7000000:
1326                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1327                         break;
1328                 case 6000000:
1329                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1330                         break;
1331                 case 5000000:
1332                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1333                         break;
1334                 case 1712000:
1335                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1336                         break;
1337                 case 0:
1338                 default:
1339                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1340                 }
1341                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1342                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1343                 p->u.ofdm.constellation = c->modulation;
1344                 p->u.ofdm.transmission_mode = c->transmission_mode;
1345                 p->u.ofdm.guard_interval = c->guard_interval;
1346                 p->u.ofdm.hierarchy_information = c->hierarchy;
1347                 break;
1348         case DVBV3_ATSC:
1349                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1350                 p->u.vsb.modulation = c->modulation;
1351                 break;
1352         }
1353         return 0;
1354 }
1355
1356 /**
1357  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1358  * @fe:         struct dvb_frontend pointer
1359  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1360  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1361  *
1362  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1363  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1364  * If p_out is not null, it will update the DVBv3 params pointed by it.
1365  */
1366 static int dtv_get_frontend(struct dvb_frontend *fe,
1367                             struct dvb_frontend_parameters *p_out)
1368 {
1369         int r;
1370
1371         if (fe->ops.get_frontend) {
1372                 r = fe->ops.get_frontend(fe);
1373                 if (unlikely(r < 0))
1374                         return r;
1375                 if (p_out)
1376                         dtv_property_legacy_params_sync(fe, p_out);
1377                 return 0;
1378         }
1379
1380         /* As everything is in cache, get_frontend fops are always supported */
1381         return 0;
1382 }
1383
1384 static int dvb_frontend_ioctl_legacy(struct file *file,
1385                         unsigned int cmd, void *parg);
1386 static int dvb_frontend_ioctl_properties(struct file *file,
1387                         unsigned int cmd, void *parg);
1388
1389 static int dtv_property_process_get(struct dvb_frontend *fe,
1390                                     const struct dtv_frontend_properties *c,
1391                                     struct dtv_property *tvp,
1392                                     struct file *file)
1393 {
1394         int r, ncaps;
1395
1396         switch(tvp->cmd) {
1397         case DTV_ENUM_DELSYS:
1398                 ncaps = 0;
1399                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1400                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1401                         ncaps++;
1402                 }
1403                 tvp->u.buffer.len = ncaps;
1404                 break;
1405         case DTV_FREQUENCY:
1406                 tvp->u.data = c->frequency;
1407                 break;
1408         case DTV_MODULATION:
1409                 tvp->u.data = c->modulation;
1410                 break;
1411         case DTV_BANDWIDTH_HZ:
1412                 tvp->u.data = c->bandwidth_hz;
1413                 break;
1414         case DTV_INVERSION:
1415                 tvp->u.data = c->inversion;
1416                 break;
1417         case DTV_SYMBOL_RATE:
1418                 tvp->u.data = c->symbol_rate;
1419                 break;
1420         case DTV_INNER_FEC:
1421                 tvp->u.data = c->fec_inner;
1422                 break;
1423         case DTV_PILOT:
1424                 tvp->u.data = c->pilot;
1425                 break;
1426         case DTV_ROLLOFF:
1427                 tvp->u.data = c->rolloff;
1428                 break;
1429         case DTV_DELIVERY_SYSTEM:
1430                 tvp->u.data = c->delivery_system;
1431                 break;
1432         case DTV_VOLTAGE:
1433                 tvp->u.data = c->voltage;
1434                 break;
1435         case DTV_TONE:
1436                 tvp->u.data = c->sectone;
1437                 break;
1438         case DTV_API_VERSION:
1439                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1440                 break;
1441         case DTV_CODE_RATE_HP:
1442                 tvp->u.data = c->code_rate_HP;
1443                 break;
1444         case DTV_CODE_RATE_LP:
1445                 tvp->u.data = c->code_rate_LP;
1446                 break;
1447         case DTV_GUARD_INTERVAL:
1448                 tvp->u.data = c->guard_interval;
1449                 break;
1450         case DTV_TRANSMISSION_MODE:
1451                 tvp->u.data = c->transmission_mode;
1452                 break;
1453         case DTV_HIERARCHY:
1454                 tvp->u.data = c->hierarchy;
1455                 break;
1456         case DTV_INTERLEAVING:
1457                 tvp->u.data = c->interleaving;
1458                 break;
1459
1460         /* ISDB-T Support here */
1461         case DTV_ISDBT_PARTIAL_RECEPTION:
1462                 tvp->u.data = c->isdbt_partial_reception;
1463                 break;
1464         case DTV_ISDBT_SOUND_BROADCASTING:
1465                 tvp->u.data = c->isdbt_sb_mode;
1466                 break;
1467         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1468                 tvp->u.data = c->isdbt_sb_subchannel;
1469                 break;
1470         case DTV_ISDBT_SB_SEGMENT_IDX:
1471                 tvp->u.data = c->isdbt_sb_segment_idx;
1472                 break;
1473         case DTV_ISDBT_SB_SEGMENT_COUNT:
1474                 tvp->u.data = c->isdbt_sb_segment_count;
1475                 break;
1476         case DTV_ISDBT_LAYER_ENABLED:
1477                 tvp->u.data = c->isdbt_layer_enabled;
1478                 break;
1479         case DTV_ISDBT_LAYERA_FEC:
1480                 tvp->u.data = c->layer[0].fec;
1481                 break;
1482         case DTV_ISDBT_LAYERA_MODULATION:
1483                 tvp->u.data = c->layer[0].modulation;
1484                 break;
1485         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1486                 tvp->u.data = c->layer[0].segment_count;
1487                 break;
1488         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1489                 tvp->u.data = c->layer[0].interleaving;
1490                 break;
1491         case DTV_ISDBT_LAYERB_FEC:
1492                 tvp->u.data = c->layer[1].fec;
1493                 break;
1494         case DTV_ISDBT_LAYERB_MODULATION:
1495                 tvp->u.data = c->layer[1].modulation;
1496                 break;
1497         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1498                 tvp->u.data = c->layer[1].segment_count;
1499                 break;
1500         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1501                 tvp->u.data = c->layer[1].interleaving;
1502                 break;
1503         case DTV_ISDBT_LAYERC_FEC:
1504                 tvp->u.data = c->layer[2].fec;
1505                 break;
1506         case DTV_ISDBT_LAYERC_MODULATION:
1507                 tvp->u.data = c->layer[2].modulation;
1508                 break;
1509         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1510                 tvp->u.data = c->layer[2].segment_count;
1511                 break;
1512         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1513                 tvp->u.data = c->layer[2].interleaving;
1514                 break;
1515
1516         /* Multistream support */
1517         case DTV_STREAM_ID:
1518         case DTV_DVBT2_PLP_ID_LEGACY:
1519                 tvp->u.data = c->stream_id;
1520                 break;
1521
1522         /* ATSC-MH */
1523         case DTV_ATSCMH_FIC_VER:
1524                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1525                 break;
1526         case DTV_ATSCMH_PARADE_ID:
1527                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1528                 break;
1529         case DTV_ATSCMH_NOG:
1530                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1531                 break;
1532         case DTV_ATSCMH_TNOG:
1533                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1534                 break;
1535         case DTV_ATSCMH_SGN:
1536                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1537                 break;
1538         case DTV_ATSCMH_PRC:
1539                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1540                 break;
1541         case DTV_ATSCMH_RS_FRAME_MODE:
1542                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1543                 break;
1544         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1545                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1546                 break;
1547         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1548                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1549                 break;
1550         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1551                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1552                 break;
1553         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1554                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1555                 break;
1556         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1557                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1558                 break;
1559         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1560                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1561                 break;
1562         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1563                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1564                 break;
1565         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1566                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1567                 break;
1568
1569         case DTV_LNA:
1570                 tvp->u.data = c->lna;
1571                 break;
1572
1573         /* Fill quality measures */
1574         case DTV_STAT_SIGNAL_STRENGTH:
1575                 tvp->u.st = c->strength;
1576                 break;
1577         case DTV_STAT_CNR:
1578                 tvp->u.st = c->cnr;
1579                 break;
1580         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1581                 tvp->u.st = c->pre_bit_error;
1582                 break;
1583         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1584                 tvp->u.st = c->pre_bit_count;
1585                 break;
1586         case DTV_STAT_POST_ERROR_BIT_COUNT:
1587                 tvp->u.st = c->post_bit_error;
1588                 break;
1589         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1590                 tvp->u.st = c->post_bit_count;
1591                 break;
1592         case DTV_STAT_ERROR_BLOCK_COUNT:
1593                 tvp->u.st = c->block_error;
1594                 break;
1595         case DTV_STAT_TOTAL_BLOCK_COUNT:
1596                 tvp->u.st = c->block_count;
1597                 break;
1598         default:
1599                 dev_dbg(fe->dvb->device,
1600                         "%s: FE property %d doesn't exist\n",
1601                         __func__, tvp->cmd);
1602                 return -EINVAL;
1603         }
1604
1605         /* Allow the frontend to override outgoing properties */
1606         if (fe->ops.get_property) {
1607                 r = fe->ops.get_property(fe, tvp);
1608                 if (r < 0)
1609                         return r;
1610         }
1611
1612         dtv_property_dump(fe, tvp);
1613
1614         return 0;
1615 }
1616
1617 static int dtv_set_frontend(struct dvb_frontend *fe);
1618
1619 static bool is_dvbv3_delsys(u32 delsys)
1620 {
1621         bool status;
1622
1623         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1624                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1625
1626         return status;
1627 }
1628
1629 /**
1630  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1631  * @fe:                 struct frontend;
1632  * @delsys:                     DVBv5 type that will be used for emulation
1633  *
1634  * Provides emulation for delivery systems that are compatible with the old
1635  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1636  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1637  * parameters are compatible with DVB-S spec.
1638  */
1639 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1640 {
1641         int i;
1642         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1643
1644         c->delivery_system = delsys;
1645
1646         /*
1647          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1648          */
1649         if (c->delivery_system == SYS_ISDBT) {
1650                 dev_dbg(fe->dvb->device,
1651                         "%s: Using defaults for SYS_ISDBT\n",
1652                         __func__);
1653
1654                 if (!c->bandwidth_hz)
1655                         c->bandwidth_hz = 6000000;
1656
1657                 c->isdbt_partial_reception = 0;
1658                 c->isdbt_sb_mode = 0;
1659                 c->isdbt_sb_subchannel = 0;
1660                 c->isdbt_sb_segment_idx = 0;
1661                 c->isdbt_sb_segment_count = 0;
1662                 c->isdbt_layer_enabled = 7;
1663                 for (i = 0; i < 3; i++) {
1664                         c->layer[i].fec = FEC_AUTO;
1665                         c->layer[i].modulation = QAM_AUTO;
1666                         c->layer[i].interleaving = 0;
1667                         c->layer[i].segment_count = 0;
1668                 }
1669         }
1670         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1671                 __func__, c->delivery_system);
1672
1673         return 0;
1674 }
1675
1676 /**
1677  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1678  * @fe:                 frontend struct
1679  * @desired_system:     delivery system requested by the user
1680  *
1681  * A DVBv5 call know what's the desired system it wants. So, set it.
1682  *
1683  * There are, however, a few known issues with early DVBv5 applications that
1684  * are also handled by this logic:
1685  *
1686  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1687  *    This is an API violation, but, as we don't want to break userspace,
1688  *    convert it to the first supported delivery system.
1689  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1690  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1691  *    ISDB-T provided backward compat with DVB-T.
1692  */
1693 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1694                                      u32 desired_system)
1695 {
1696         int ncaps;
1697         u32 delsys = SYS_UNDEFINED;
1698         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1699         enum dvbv3_emulation_type type;
1700
1701         /*
1702          * It was reported that some old DVBv5 applications were
1703          * filling delivery_system with SYS_UNDEFINED. If this happens,
1704          * assume that the application wants to use the first supported
1705          * delivery system.
1706          */
1707         if (desired_system == SYS_UNDEFINED)
1708                 desired_system = fe->ops.delsys[0];
1709
1710         /*
1711          * This is a DVBv5 call. So, it likely knows the supported
1712          * delivery systems. So, check if the desired delivery system is
1713          * supported
1714          */
1715         ncaps = 0;
1716         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1717                 if (fe->ops.delsys[ncaps] == desired_system) {
1718                         c->delivery_system = desired_system;
1719                         dev_dbg(fe->dvb->device,
1720                                         "%s: Changing delivery system to %d\n",
1721                                         __func__, desired_system);
1722                         return 0;
1723                 }
1724                 ncaps++;
1725         }
1726
1727         /*
1728          * The requested delivery system isn't supported. Maybe userspace
1729          * is requesting a DVBv3 compatible delivery system.
1730          *
1731          * The emulation only works if the desired system is one of the
1732          * delivery systems supported by DVBv3 API
1733          */
1734         if (!is_dvbv3_delsys(desired_system)) {
1735                 dev_dbg(fe->dvb->device,
1736                         "%s: Delivery system %d not supported.\n",
1737                         __func__, desired_system);
1738                 return -EINVAL;
1739         }
1740
1741         type = dvbv3_type(desired_system);
1742
1743         /*
1744         * Get the last non-DVBv3 delivery system that has the same type
1745         * of the desired system
1746         */
1747         ncaps = 0;
1748         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1749                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1750                         delsys = fe->ops.delsys[ncaps];
1751                 ncaps++;
1752         }
1753
1754         /* There's nothing compatible with the desired delivery system */
1755         if (delsys == SYS_UNDEFINED) {
1756                 dev_dbg(fe->dvb->device,
1757                         "%s: Delivery system %d not supported on emulation mode.\n",
1758                         __func__, desired_system);
1759                 return -EINVAL;
1760         }
1761
1762         dev_dbg(fe->dvb->device,
1763                 "%s: Using delivery system %d emulated as if it were %d\n",
1764                 __func__, delsys, desired_system);
1765
1766         return emulate_delivery_system(fe, desired_system);
1767 }
1768
1769 /**
1770  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1771  * @fe: frontend struct
1772  *
1773  * A DVBv3 call doesn't know what's the desired system it wants. It also
1774  * doesn't allow to switch between different types. Due to that, userspace
1775  * should use DVBv5 instead.
1776  * However, in order to avoid breaking userspace API, limited backward
1777  * compatibility support is provided.
1778  *
1779  * There are some delivery systems that are incompatible with DVBv3 calls.
1780  *
1781  * This routine should work fine for frontends that support just one delivery
1782  * system.
1783  *
1784  * For frontends that support multiple frontends:
1785  * 1) It defaults to use the first supported delivery system. There's an
1786  *    userspace application that allows changing it at runtime;
1787  *
1788  * 2) If the current delivery system is not compatible with DVBv3, it gets
1789  *    the first one that it is compatible.
1790  *
1791  * NOTE: in order for this to work with applications like Kaffeine that
1792  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1793  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1794  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1795  *      to DVB-S.
1796  */
1797 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1798 {
1799         int ncaps;
1800         u32 delsys = SYS_UNDEFINED;
1801         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1802
1803         /* If not set yet, defaults to the first supported delivery system */
1804         if (c->delivery_system == SYS_UNDEFINED)
1805                 c->delivery_system = fe->ops.delsys[0];
1806
1807         /*
1808          * Trivial case: just use the current one, if it already a DVBv3
1809          * delivery system
1810          */
1811         if (is_dvbv3_delsys(c->delivery_system)) {
1812                 dev_dbg(fe->dvb->device,
1813                                 "%s: Using delivery system to %d\n",
1814                                 __func__, c->delivery_system);
1815                 return 0;
1816         }
1817
1818         /*
1819          * Seek for the first delivery system that it is compatible with a
1820          * DVBv3 standard
1821          */
1822         ncaps = 0;
1823         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1824                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1825                         delsys = fe->ops.delsys[ncaps];
1826                         break;
1827                 }
1828                 ncaps++;
1829         }
1830         if (delsys == SYS_UNDEFINED) {
1831                 dev_dbg(fe->dvb->device,
1832                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1833                         __func__);
1834                 return -EINVAL;
1835         }
1836         return emulate_delivery_system(fe, delsys);
1837 }
1838
1839 static int dtv_property_process_set(struct dvb_frontend *fe,
1840                                     struct dtv_property *tvp,
1841                                     struct file *file)
1842 {
1843         int r = 0;
1844         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1845
1846         /* Allow the frontend to validate incoming properties */
1847         if (fe->ops.set_property) {
1848                 r = fe->ops.set_property(fe, tvp);
1849                 if (r < 0)
1850                         return r;
1851         }
1852
1853         switch(tvp->cmd) {
1854         case DTV_CLEAR:
1855                 /*
1856                  * Reset a cache of data specific to the frontend here. This does
1857                  * not effect hardware.
1858                  */
1859                 dvb_frontend_clear_cache(fe);
1860                 break;
1861         case DTV_TUNE:
1862                 /* interpret the cache of data, build either a traditional frontend
1863                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1864                  * ioctl.
1865                  */
1866                 c->state = tvp->cmd;
1867                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1868                                 __func__);
1869
1870                 r = dtv_set_frontend(fe);
1871                 break;
1872         case DTV_FREQUENCY:
1873                 c->frequency = tvp->u.data;
1874                 break;
1875         case DTV_MODULATION:
1876                 c->modulation = tvp->u.data;
1877                 break;
1878         case DTV_BANDWIDTH_HZ:
1879                 c->bandwidth_hz = tvp->u.data;
1880                 break;
1881         case DTV_INVERSION:
1882                 c->inversion = tvp->u.data;
1883                 break;
1884         case DTV_SYMBOL_RATE:
1885                 c->symbol_rate = tvp->u.data;
1886                 break;
1887         case DTV_INNER_FEC:
1888                 c->fec_inner = tvp->u.data;
1889                 break;
1890         case DTV_PILOT:
1891                 c->pilot = tvp->u.data;
1892                 break;
1893         case DTV_ROLLOFF:
1894                 c->rolloff = tvp->u.data;
1895                 break;
1896         case DTV_DELIVERY_SYSTEM:
1897                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1898                 break;
1899         case DTV_VOLTAGE:
1900                 c->voltage = tvp->u.data;
1901                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1902                         (void *)c->voltage);
1903                 break;
1904         case DTV_TONE:
1905                 c->sectone = tvp->u.data;
1906                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1907                         (void *)c->sectone);
1908                 break;
1909         case DTV_CODE_RATE_HP:
1910                 c->code_rate_HP = tvp->u.data;
1911                 break;
1912         case DTV_CODE_RATE_LP:
1913                 c->code_rate_LP = tvp->u.data;
1914                 break;
1915         case DTV_GUARD_INTERVAL:
1916                 c->guard_interval = tvp->u.data;
1917                 break;
1918         case DTV_TRANSMISSION_MODE:
1919                 c->transmission_mode = tvp->u.data;
1920                 break;
1921         case DTV_HIERARCHY:
1922                 c->hierarchy = tvp->u.data;
1923                 break;
1924         case DTV_INTERLEAVING:
1925                 c->interleaving = tvp->u.data;
1926                 break;
1927
1928         /* ISDB-T Support here */
1929         case DTV_ISDBT_PARTIAL_RECEPTION:
1930                 c->isdbt_partial_reception = tvp->u.data;
1931                 break;
1932         case DTV_ISDBT_SOUND_BROADCASTING:
1933                 c->isdbt_sb_mode = tvp->u.data;
1934                 break;
1935         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1936                 c->isdbt_sb_subchannel = tvp->u.data;
1937                 break;
1938         case DTV_ISDBT_SB_SEGMENT_IDX:
1939                 c->isdbt_sb_segment_idx = tvp->u.data;
1940                 break;
1941         case DTV_ISDBT_SB_SEGMENT_COUNT:
1942                 c->isdbt_sb_segment_count = tvp->u.data;
1943                 break;
1944         case DTV_ISDBT_LAYER_ENABLED:
1945                 c->isdbt_layer_enabled = tvp->u.data;
1946                 break;
1947         case DTV_ISDBT_LAYERA_FEC:
1948                 c->layer[0].fec = tvp->u.data;
1949                 break;
1950         case DTV_ISDBT_LAYERA_MODULATION:
1951                 c->layer[0].modulation = tvp->u.data;
1952                 break;
1953         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1954                 c->layer[0].segment_count = tvp->u.data;
1955                 break;
1956         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1957                 c->layer[0].interleaving = tvp->u.data;
1958                 break;
1959         case DTV_ISDBT_LAYERB_FEC:
1960                 c->layer[1].fec = tvp->u.data;
1961                 break;
1962         case DTV_ISDBT_LAYERB_MODULATION:
1963                 c->layer[1].modulation = tvp->u.data;
1964                 break;
1965         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1966                 c->layer[1].segment_count = tvp->u.data;
1967                 break;
1968         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1969                 c->layer[1].interleaving = tvp->u.data;
1970                 break;
1971         case DTV_ISDBT_LAYERC_FEC:
1972                 c->layer[2].fec = tvp->u.data;
1973                 break;
1974         case DTV_ISDBT_LAYERC_MODULATION:
1975                 c->layer[2].modulation = tvp->u.data;
1976                 break;
1977         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1978                 c->layer[2].segment_count = tvp->u.data;
1979                 break;
1980         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1981                 c->layer[2].interleaving = tvp->u.data;
1982                 break;
1983
1984         /* Multistream support */
1985         case DTV_STREAM_ID:
1986         case DTV_DVBT2_PLP_ID_LEGACY:
1987                 c->stream_id = tvp->u.data;
1988                 break;
1989
1990         /* ATSC-MH */
1991         case DTV_ATSCMH_PARADE_ID:
1992                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1993                 break;
1994         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1995                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1996                 break;
1997
1998         case DTV_LNA:
1999                 c->lna = tvp->u.data;
2000                 if (fe->ops.set_lna)
2001                         r = fe->ops.set_lna(fe);
2002                 if (r < 0)
2003                         c->lna = LNA_AUTO;
2004                 break;
2005
2006         default:
2007                 return -EINVAL;
2008         }
2009
2010         return r;
2011 }
2012
2013 static int dvb_frontend_ioctl(struct file *file,
2014                         unsigned int cmd, void *parg)
2015 {
2016         struct dvb_device *dvbdev = file->private_data;
2017         struct dvb_frontend *fe = dvbdev->priv;
2018         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2019         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2020         int err = -EOPNOTSUPP;
2021
2022         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
2023         if (down_interruptible(&fepriv->sem))
2024                 return -ERESTARTSYS;
2025
2026         if (fe->exit != DVB_FE_NO_EXIT) {
2027                 up(&fepriv->sem);
2028                 return -ENODEV;
2029         }
2030
2031         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
2032             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
2033              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2034                 up(&fepriv->sem);
2035                 return -EPERM;
2036         }
2037
2038         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
2039                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
2040         else {
2041                 c->state = DTV_UNDEFINED;
2042                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
2043         }
2044
2045         up(&fepriv->sem);
2046         return err;
2047 }
2048
2049 static int dvb_frontend_ioctl_properties(struct file *file,
2050                         unsigned int cmd, void *parg)
2051 {
2052         struct dvb_device *dvbdev = file->private_data;
2053         struct dvb_frontend *fe = dvbdev->priv;
2054         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2055         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2056         int err = 0;
2057
2058         struct dtv_properties *tvps = parg;
2059         struct dtv_property *tvp = NULL;
2060         int i;
2061
2062         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2063
2064         if (cmd == FE_SET_PROPERTY) {
2065                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2066                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2067
2068                 /* Put an arbitrary limit on the number of messages that can
2069                  * be sent at once */
2070                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2071                         return -EINVAL;
2072
2073                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2074                 if (!tvp) {
2075                         err = -ENOMEM;
2076                         goto out;
2077                 }
2078
2079                 if (copy_from_user(tvp, (void __user *)tvps->props,
2080                                    tvps->num * sizeof(struct dtv_property))) {
2081                         err = -EFAULT;
2082                         goto out;
2083                 }
2084
2085                 for (i = 0; i < tvps->num; i++) {
2086                         err = dtv_property_process_set(fe, tvp + i, file);
2087                         if (err < 0)
2088                                 goto out;
2089                         (tvp + i)->result = err;
2090                 }
2091
2092                 if (c->state == DTV_TUNE)
2093                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
2094
2095         } else if (cmd == FE_GET_PROPERTY) {
2096                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2097                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2098
2099                 /* Put an arbitrary limit on the number of messages that can
2100                  * be sent at once */
2101                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2102                         return -EINVAL;
2103
2104                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2105                 if (!tvp) {
2106                         err = -ENOMEM;
2107                         goto out;
2108                 }
2109
2110                 if (copy_from_user(tvp, (void __user *)tvps->props,
2111                                    tvps->num * sizeof(struct dtv_property))) {
2112                         err = -EFAULT;
2113                         goto out;
2114                 }
2115
2116                 /*
2117                  * Fills the cache out struct with the cache contents, plus
2118                  * the data retrieved from get_frontend, if the frontend
2119                  * is not idle. Otherwise, returns the cached content
2120                  */
2121                 if (fepriv->state != FESTATE_IDLE) {
2122                         err = dtv_get_frontend(fe, NULL);
2123                         if (err < 0)
2124                                 goto out;
2125                 }
2126                 for (i = 0; i < tvps->num; i++) {
2127                         err = dtv_property_process_get(fe, c, tvp + i, file);
2128                         if (err < 0)
2129                                 goto out;
2130                         (tvp + i)->result = err;
2131                 }
2132
2133                 if (copy_to_user((void __user *)tvps->props, tvp,
2134                                  tvps->num * sizeof(struct dtv_property))) {
2135                         err = -EFAULT;
2136                         goto out;
2137                 }
2138
2139         } else
2140                 err = -EOPNOTSUPP;
2141
2142 out:
2143         kfree(tvp);
2144         return err;
2145 }
2146
2147 static int dtv_set_frontend(struct dvb_frontend *fe)
2148 {
2149         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2150         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2151         struct dvb_frontend_tune_settings fetunesettings;
2152         u32 rolloff = 0;
2153
2154         if (dvb_frontend_check_parameters(fe) < 0)
2155                 return -EINVAL;
2156
2157         /*
2158          * Initialize output parameters to match the values given by
2159          * the user. FE_SET_FRONTEND triggers an initial frontend event
2160          * with status = 0, which copies output parameters to userspace.
2161          */
2162         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2163
2164         /*
2165          * Be sure that the bandwidth will be filled for all
2166          * non-satellite systems, as tuners need to know what
2167          * low pass/Nyquist half filter should be applied, in
2168          * order to avoid inter-channel noise.
2169          *
2170          * ISDB-T and DVB-T/T2 already sets bandwidth.
2171          * ATSC and DVB-C don't set, so, the core should fill it.
2172          *
2173          * On DVB-C Annex A and C, the bandwidth is a function of
2174          * the roll-off and symbol rate. Annex B defines different
2175          * roll-off factors depending on the modulation. Fortunately,
2176          * Annex B is only used with 6MHz, so there's no need to
2177          * calculate it.
2178          *
2179          * While not officially supported, a side effect of handling it at
2180          * the cache level is that a program could retrieve the bandwidth
2181          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2182          */
2183         switch (c->delivery_system) {
2184         case SYS_ATSC:
2185         case SYS_DVBC_ANNEX_B:
2186                 c->bandwidth_hz = 6000000;
2187                 break;
2188         case SYS_DVBC_ANNEX_A:
2189                 rolloff = 115;
2190                 break;
2191         case SYS_DVBC_ANNEX_C:
2192                 rolloff = 113;
2193                 break;
2194         case SYS_DVBS:
2195         case SYS_TURBO:
2196         case SYS_ISDBS:
2197                 rolloff = 135;
2198                 break;
2199         case SYS_DVBS2:
2200                 switch (c->rolloff) {
2201                 case ROLLOFF_20:
2202                         rolloff = 120;
2203                         break;
2204                 case ROLLOFF_25:
2205                         rolloff = 125;
2206                         break;
2207                 default:
2208                 case ROLLOFF_35:
2209                         rolloff = 135;
2210                 }
2211                 break;
2212         default:
2213                 break;
2214         }
2215         if (rolloff)
2216                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
2217
2218         /* force auto frequency inversion if requested */
2219         if (dvb_force_auto_inversion)
2220                 c->inversion = INVERSION_AUTO;
2221
2222         /*
2223          * without hierarchical coding code_rate_LP is irrelevant,
2224          * so we tolerate the otherwise invalid FEC_NONE setting
2225          */
2226         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2227                 c->code_rate_LP = FEC_AUTO;
2228
2229         /* get frontend-specific tuning settings */
2230         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2231         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2232                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2233                 fepriv->max_drift = fetunesettings.max_drift;
2234                 fepriv->step_size = fetunesettings.step_size;
2235         } else {
2236                 /* default values */
2237                 switch (c->delivery_system) {
2238                 case SYS_DVBS:
2239                 case SYS_DVBS2:
2240                 case SYS_ISDBS:
2241                 case SYS_TURBO:
2242                 case SYS_DVBC_ANNEX_A:
2243                 case SYS_DVBC_ANNEX_C:
2244                         fepriv->min_delay = HZ / 20;
2245                         fepriv->step_size = c->symbol_rate / 16000;
2246                         fepriv->max_drift = c->symbol_rate / 2000;
2247                         break;
2248                 case SYS_DVBT:
2249                 case SYS_DVBT2:
2250                 case SYS_ISDBT:
2251                 case SYS_DTMB:
2252                         fepriv->min_delay = HZ / 20;
2253                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2254                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2255                         break;
2256                 default:
2257                         /*
2258                          * FIXME: This sounds wrong! if freqency_stepsize is
2259                          * defined by the frontend, why not use it???
2260                          */
2261                         fepriv->min_delay = HZ / 20;
2262                         fepriv->step_size = 0; /* no zigzag */
2263                         fepriv->max_drift = 0;
2264                         break;
2265                 }
2266         }
2267         if (dvb_override_tune_delay > 0)
2268                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2269
2270         fepriv->state = FESTATE_RETUNE;
2271
2272         /* Request the search algorithm to search */
2273         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2274
2275         dvb_frontend_clear_events(fe);
2276         dvb_frontend_add_event(fe, 0);
2277         dvb_frontend_wakeup(fe);
2278         fepriv->status = 0;
2279
2280         return 0;
2281 }
2282
2283
2284 static int dvb_frontend_ioctl_legacy(struct file *file,
2285                         unsigned int cmd, void *parg)
2286 {
2287         struct dvb_device *dvbdev = file->private_data;
2288         struct dvb_frontend *fe = dvbdev->priv;
2289         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2290         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2291         int err = -EOPNOTSUPP;
2292
2293         switch (cmd) {
2294         case FE_GET_INFO: {
2295                 struct dvb_frontend_info* info = parg;
2296
2297                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2298                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2299
2300                 /*
2301                  * Associate the 4 delivery systems supported by DVBv3
2302                  * API with their DVBv5 counterpart. For the other standards,
2303                  * use the closest type, assuming that it would hopefully
2304                  * work with a DVBv3 application.
2305                  * It should be noticed that, on multi-frontend devices with
2306                  * different types (terrestrial and cable, for example),
2307                  * a pure DVBv3 application won't be able to use all delivery
2308                  * systems. Yet, changing the DVBv5 cache to the other delivery
2309                  * system should be enough for making it work.
2310                  */
2311                 switch (dvbv3_type(c->delivery_system)) {
2312                 case DVBV3_QPSK:
2313                         info->type = FE_QPSK;
2314                         break;
2315                 case DVBV3_ATSC:
2316                         info->type = FE_ATSC;
2317                         break;
2318                 case DVBV3_QAM:
2319                         info->type = FE_QAM;
2320                         break;
2321                 case DVBV3_OFDM:
2322                         info->type = FE_OFDM;
2323                         break;
2324                 default:
2325                         dev_err(fe->dvb->device,
2326                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2327                                         __func__, c->delivery_system);
2328                         fe->ops.info.type = FE_OFDM;
2329                 }
2330                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2331                                  __func__, c->delivery_system, fe->ops.info.type);
2332
2333                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2334                  * do it, it is done for it. */
2335                 info->caps |= FE_CAN_INVERSION_AUTO;
2336                 err = 0;
2337                 break;
2338         }
2339
2340         case FE_READ_STATUS: {
2341                 fe_status_t* status = parg;
2342
2343                 /* if retune was requested but hasn't occurred yet, prevent
2344                  * that user get signal state from previous tuning */
2345                 if (fepriv->state == FESTATE_RETUNE ||
2346                     fepriv->state == FESTATE_ERROR) {
2347                         err=0;
2348                         *status = 0;
2349                         break;
2350                 }
2351
2352                 if (fe->ops.read_status)
2353                         err = fe->ops.read_status(fe, status);
2354                 break;
2355         }
2356
2357         case FE_READ_BER:
2358                 if (fe->ops.read_ber) {
2359                         if (fepriv->thread)
2360                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2361                         else
2362                                 err = -EAGAIN;
2363                 }
2364                 break;
2365
2366         case FE_READ_SIGNAL_STRENGTH:
2367                 if (fe->ops.read_signal_strength) {
2368                         if (fepriv->thread)
2369                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2370                         else
2371                                 err = -EAGAIN;
2372                 }
2373                 break;
2374
2375         case FE_READ_SNR:
2376                 if (fe->ops.read_snr) {
2377                         if (fepriv->thread)
2378                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2379                         else
2380                                 err = -EAGAIN;
2381                 }
2382                 break;
2383
2384         case FE_READ_UNCORRECTED_BLOCKS:
2385                 if (fe->ops.read_ucblocks) {
2386                         if (fepriv->thread)
2387                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2388                         else
2389                                 err = -EAGAIN;
2390                 }
2391                 break;
2392
2393         case FE_DISEQC_RESET_OVERLOAD:
2394                 if (fe->ops.diseqc_reset_overload) {
2395                         err = fe->ops.diseqc_reset_overload(fe);
2396                         fepriv->state = FESTATE_DISEQC;
2397                         fepriv->status = 0;
2398                 }
2399                 break;
2400
2401         case FE_DISEQC_SEND_MASTER_CMD:
2402                 if (fe->ops.diseqc_send_master_cmd) {
2403                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2404                         fepriv->state = FESTATE_DISEQC;
2405                         fepriv->status = 0;
2406                 }
2407                 break;
2408
2409         case FE_DISEQC_SEND_BURST:
2410                 if (fe->ops.diseqc_send_burst) {
2411                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2412                         fepriv->state = FESTATE_DISEQC;
2413                         fepriv->status = 0;
2414                 }
2415                 break;
2416
2417         case FE_SET_TONE:
2418                 if (fe->ops.set_tone) {
2419                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2420                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2421                         fepriv->state = FESTATE_DISEQC;
2422                         fepriv->status = 0;
2423                 }
2424                 break;
2425
2426         case FE_SET_VOLTAGE:
2427                 if (fe->ops.set_voltage) {
2428                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2429                         fepriv->voltage = (fe_sec_voltage_t) parg;
2430                         fepriv->state = FESTATE_DISEQC;
2431                         fepriv->status = 0;
2432                 }
2433                 break;
2434
2435         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2436                 if (fe->ops.dishnetwork_send_legacy_command) {
2437                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2438                         fepriv->state = FESTATE_DISEQC;
2439                         fepriv->status = 0;
2440                 } else if (fe->ops.set_voltage) {
2441                         /*
2442                          * NOTE: This is a fallback condition.  Some frontends
2443                          * (stv0299 for instance) take longer than 8msec to
2444                          * respond to a set_voltage command.  Those switches
2445                          * need custom routines to switch properly.  For all
2446                          * other frontends, the following should work ok.
2447                          * Dish network legacy switches (as used by Dish500)
2448                          * are controlled by sending 9-bit command words
2449                          * spaced 8msec apart.
2450                          * the actual command word is switch/port dependent
2451                          * so it is up to the userspace application to send
2452                          * the right command.
2453                          * The command must always start with a '0' after
2454                          * initialization, so parg is 8 bits and does not
2455                          * include the initialization or start bit
2456                          */
2457                         unsigned long swcmd = ((unsigned long) parg) << 1;
2458                         struct timeval nexttime;
2459                         struct timeval tv[10];
2460                         int i;
2461                         u8 last = 1;
2462                         if (dvb_frontend_debug)
2463                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2464                         do_gettimeofday(&nexttime);
2465                         if (dvb_frontend_debug)
2466                                 tv[0] = nexttime;
2467                         /* before sending a command, initialize by sending
2468                          * a 32ms 18V to the switch
2469                          */
2470                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2471                         dvb_frontend_sleep_until(&nexttime, 32000);
2472
2473                         for (i = 0; i < 9; i++) {
2474                                 if (dvb_frontend_debug)
2475                                         do_gettimeofday(&tv[i + 1]);
2476                                 if ((swcmd & 0x01) != last) {
2477                                         /* set voltage to (last ? 13V : 18V) */
2478                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2479                                         last = (last) ? 0 : 1;
2480                                 }
2481                                 swcmd = swcmd >> 1;
2482                                 if (i != 8)
2483                                         dvb_frontend_sleep_until(&nexttime, 8000);
2484                         }
2485                         if (dvb_frontend_debug) {
2486                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2487                                         __func__, fe->dvb->num);
2488                                 for (i = 1; i < 10; i++)
2489                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2490                         }
2491                         err = 0;
2492                         fepriv->state = FESTATE_DISEQC;
2493                         fepriv->status = 0;
2494                 }
2495                 break;
2496
2497         case FE_DISEQC_RECV_SLAVE_REPLY:
2498                 if (fe->ops.diseqc_recv_slave_reply)
2499                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2500                 break;
2501
2502         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2503                 if (fe->ops.enable_high_lnb_voltage)
2504                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2505                 break;
2506
2507         case FE_SET_FRONTEND:
2508                 err = dvbv3_set_delivery_system(fe);
2509                 if (err)
2510                         break;
2511
2512                 err = dtv_property_cache_sync(fe, c, parg);
2513                 if (err)
2514                         break;
2515                 err = dtv_set_frontend(fe);
2516                 break;
2517         case FE_GET_EVENT:
2518                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2519                 break;
2520
2521         case FE_GET_FRONTEND:
2522                 err = dtv_get_frontend(fe, parg);
2523                 break;
2524
2525         case FE_SET_FRONTEND_TUNE_MODE:
2526                 fepriv->tune_mode_flags = (unsigned long) parg;
2527                 err = 0;
2528                 break;
2529         }
2530
2531         return err;
2532 }
2533
2534
2535 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2536 {
2537         struct dvb_device *dvbdev = file->private_data;
2538         struct dvb_frontend *fe = dvbdev->priv;
2539         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2540
2541         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2542
2543         poll_wait (file, &fepriv->events.wait_queue, wait);
2544
2545         if (fepriv->events.eventw != fepriv->events.eventr)
2546                 return (POLLIN | POLLRDNORM | POLLPRI);
2547
2548         return 0;
2549 }
2550
2551 static int dvb_frontend_open(struct inode *inode, struct file *file)
2552 {
2553         struct dvb_device *dvbdev = file->private_data;
2554         struct dvb_frontend *fe = dvbdev->priv;
2555         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2556         struct dvb_adapter *adapter = fe->dvb;
2557         int ret;
2558
2559         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2560         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2561                 return -ENODEV;
2562
2563         if (adapter->mfe_shared) {
2564                 mutex_lock (&adapter->mfe_lock);
2565
2566                 if (adapter->mfe_dvbdev == NULL)
2567                         adapter->mfe_dvbdev = dvbdev;
2568
2569                 else if (adapter->mfe_dvbdev != dvbdev) {
2570                         struct dvb_device
2571                                 *mfedev = adapter->mfe_dvbdev;
2572                         struct dvb_frontend
2573                                 *mfe = mfedev->priv;
2574                         struct dvb_frontend_private
2575                                 *mfepriv = mfe->frontend_priv;
2576                         int mferetry = (dvb_mfe_wait_time << 1);
2577
2578                         mutex_unlock (&adapter->mfe_lock);
2579                         while (mferetry-- && (mfedev->users != -1 ||
2580                                         mfepriv->thread != NULL)) {
2581                                 if(msleep_interruptible(500)) {
2582                                         if(signal_pending(current))
2583                                                 return -EINTR;
2584                                 }
2585                         }
2586
2587                         mutex_lock (&adapter->mfe_lock);
2588                         if(adapter->mfe_dvbdev != dvbdev) {
2589                                 mfedev = adapter->mfe_dvbdev;
2590                                 mfe = mfedev->priv;
2591                                 mfepriv = mfe->frontend_priv;
2592                                 if (mfedev->users != -1 ||
2593                                                 mfepriv->thread != NULL) {
2594                                         mutex_unlock (&adapter->mfe_lock);
2595                                         return -EBUSY;
2596                                 }
2597                                 adapter->mfe_dvbdev = dvbdev;
2598                         }
2599                 }
2600         }
2601
2602         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2603                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2604                         goto err0;
2605
2606                 /* If we took control of the bus, we need to force
2607                    reinitialization.  This is because many ts_bus_ctrl()
2608                    functions strobe the RESET pin on the demod, and if the
2609                    frontend thread already exists then the dvb_init() routine
2610                    won't get called (which is what usually does initial
2611                    register configuration). */
2612                 fepriv->reinitialise = 1;
2613         }
2614
2615         if ((ret = dvb_generic_open (inode, file)) < 0)
2616                 goto err1;
2617
2618         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2619                 /* normal tune mode when opened R/W */
2620                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2621                 fepriv->tone = -1;
2622                 fepriv->voltage = -1;
2623
2624                 ret = dvb_frontend_start (fe);
2625                 if (ret)
2626                         goto err2;
2627
2628                 /*  empty event queue */
2629                 fepriv->events.eventr = fepriv->events.eventw = 0;
2630         }
2631
2632         if (adapter->mfe_shared)
2633                 mutex_unlock (&adapter->mfe_lock);
2634         return ret;
2635
2636 err2:
2637         dvb_generic_release(inode, file);
2638 err1:
2639         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2640                 fe->ops.ts_bus_ctrl(fe, 0);
2641 err0:
2642         if (adapter->mfe_shared)
2643                 mutex_unlock (&adapter->mfe_lock);
2644         return ret;
2645 }
2646
2647 static int dvb_frontend_release(struct inode *inode, struct file *file)
2648 {
2649         struct dvb_device *dvbdev = file->private_data;
2650         struct dvb_frontend *fe = dvbdev->priv;
2651         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2652         int ret;
2653
2654         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2655
2656         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2657                 fepriv->release_jiffies = jiffies;
2658                 mb();
2659         }
2660
2661         ret = dvb_generic_release (inode, file);
2662
2663         if (dvbdev->users == -1) {
2664                 wake_up(&fepriv->wait_queue);
2665                 if (fe->exit != DVB_FE_NO_EXIT)
2666                         wake_up(&dvbdev->wait_queue);
2667                 if (fe->ops.ts_bus_ctrl)
2668                         fe->ops.ts_bus_ctrl(fe, 0);
2669         }
2670
2671         return ret;
2672 }
2673
2674 static const struct file_operations dvb_frontend_fops = {
2675         .owner          = THIS_MODULE,
2676         .unlocked_ioctl = dvb_generic_ioctl,
2677         .poll           = dvb_frontend_poll,
2678         .open           = dvb_frontend_open,
2679         .release        = dvb_frontend_release,
2680         .llseek         = noop_llseek,
2681 };
2682
2683 int dvb_frontend_suspend(struct dvb_frontend *fe)
2684 {
2685         int ret = 0;
2686
2687         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2688                         fe->id);
2689
2690         if (fe->ops.tuner_ops.suspend)
2691                 ret = fe->ops.tuner_ops.suspend(fe);
2692         else if (fe->ops.tuner_ops.sleep)
2693                 ret = fe->ops.tuner_ops.sleep(fe);
2694
2695         if (fe->ops.sleep)
2696                 ret = fe->ops.sleep(fe);
2697
2698         return ret;
2699 }
2700 EXPORT_SYMBOL(dvb_frontend_suspend);
2701
2702 int dvb_frontend_resume(struct dvb_frontend *fe)
2703 {
2704         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2705         int ret = 0;
2706
2707         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2708                         fe->id);
2709
2710         fe->exit = DVB_FE_DEVICE_RESUME;
2711         if (fe->ops.init)
2712                 ret = fe->ops.init(fe);
2713
2714         if (fe->ops.tuner_ops.resume)
2715                 ret = fe->ops.tuner_ops.resume(fe);
2716         else if (fe->ops.tuner_ops.init)
2717                 ret = fe->ops.tuner_ops.init(fe);
2718
2719         fe->exit = DVB_FE_NO_EXIT;
2720         fepriv->state = FESTATE_RETUNE;
2721         dvb_frontend_wakeup(fe);
2722
2723         return ret;
2724 }
2725 EXPORT_SYMBOL(dvb_frontend_resume);
2726
2727 int dvb_register_frontend(struct dvb_adapter* dvb,
2728                           struct dvb_frontend* fe)
2729 {
2730         struct dvb_frontend_private *fepriv;
2731         const struct dvb_device dvbdev_template = {
2732                 .users = ~0,
2733                 .writers = 1,
2734                 .readers = (~0)-1,
2735                 .fops = &dvb_frontend_fops,
2736 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2737                 .name = fe->ops.info.name,
2738 #endif
2739                 .kernel_ioctl = dvb_frontend_ioctl
2740         };
2741
2742         dev_dbg(dvb->device, "%s:\n", __func__);
2743
2744         if (mutex_lock_interruptible(&frontend_mutex))
2745                 return -ERESTARTSYS;
2746
2747         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2748         if (fe->frontend_priv == NULL) {
2749                 mutex_unlock(&frontend_mutex);
2750                 return -ENOMEM;
2751         }
2752         fepriv = fe->frontend_priv;
2753
2754         sema_init(&fepriv->sem, 1);
2755         init_waitqueue_head (&fepriv->wait_queue);
2756         init_waitqueue_head (&fepriv->events.wait_queue);
2757         mutex_init(&fepriv->events.mtx);
2758         fe->dvb = dvb;
2759         fepriv->inversion = INVERSION_OFF;
2760
2761         dev_info(fe->dvb->device,
2762                         "DVB: registering adapter %i frontend %i (%s)...\n",
2763                         fe->dvb->num, fe->id, fe->ops.info.name);
2764
2765         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2766                              fe, DVB_DEVICE_FRONTEND);
2767
2768         /*
2769          * Initialize the cache to the proper values according with the
2770          * first supported delivery system (ops->delsys[0])
2771          */
2772
2773         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2774         dvb_frontend_clear_cache(fe);
2775
2776         mutex_unlock(&frontend_mutex);
2777         return 0;
2778 }
2779 EXPORT_SYMBOL(dvb_register_frontend);
2780
2781 int dvb_unregister_frontend(struct dvb_frontend* fe)
2782 {
2783         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2784         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2785
2786         mutex_lock(&frontend_mutex);
2787         dvb_frontend_stop (fe);
2788         mutex_unlock(&frontend_mutex);
2789
2790         if (fepriv->dvbdev->users < -1)
2791                 wait_event(fepriv->dvbdev->wait_queue,
2792                                 fepriv->dvbdev->users==-1);
2793
2794         mutex_lock(&frontend_mutex);
2795         dvb_unregister_device (fepriv->dvbdev);
2796
2797         /* fe is invalid now */
2798         kfree(fepriv);
2799         mutex_unlock(&frontend_mutex);
2800         return 0;
2801 }
2802 EXPORT_SYMBOL(dvb_unregister_frontend);
2803
2804 #ifdef CONFIG_MEDIA_ATTACH
2805 void dvb_frontend_detach(struct dvb_frontend* fe)
2806 {
2807         void *ptr;
2808
2809         if (fe->ops.release_sec) {
2810                 fe->ops.release_sec(fe);
2811                 dvb_detach(fe->ops.release_sec);
2812         }
2813         if (fe->ops.tuner_ops.release) {
2814                 fe->ops.tuner_ops.release(fe);
2815                 dvb_detach(fe->ops.tuner_ops.release);
2816         }
2817         if (fe->ops.analog_ops.release) {
2818                 fe->ops.analog_ops.release(fe);
2819                 dvb_detach(fe->ops.analog_ops.release);
2820         }
2821         ptr = (void*)fe->ops.release;
2822         if (ptr) {
2823                 fe->ops.release(fe);
2824                 dvb_detach(ptr);
2825         }
2826 }
2827 #else
2828 void dvb_frontend_detach(struct dvb_frontend* fe)
2829 {
2830         if (fe->ops.release_sec)
2831                 fe->ops.release_sec(fe);
2832         if (fe->ops.tuner_ops.release)
2833                 fe->ops.tuner_ops.release(fe);
2834         if (fe->ops.analog_ops.release)
2835                 fe->ops.analog_ops.release(fe);
2836         if (fe->ops.release)
2837                 fe->ops.release(fe);
2838 }
2839 #endif
2840 EXPORT_SYMBOL(dvb_frontend_detach);