drivers/media/dvb-core/dvb_frontend.c

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