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 <linux/compat.h>
  45 #include <asm/processor.h>
  46
  47 #include "dvb_frontend.h"
  48 #include "dvbdev.h"
  49 #include <linux/dvb/version.h>
  50
  51 static int dvb_frontend_debug;
  52 static int dvb_shutdown_timeout;
  53 static int dvb_force_auto_inversion;
  54 static int dvb_override_tune_delay;
  55 static int dvb_powerdown_on_sleep = 1;
  56 static int dvb_mfe_wait_time = 5;
  57
  58 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  59 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  60 module_param(dvb_shutdown_timeout, int, 0644);
  61 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  62 module_param(dvb_force_auto_inversion, int, 0644);
  63 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  64 module_param(dvb_override_tune_delay, int, 0644);
  65 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  66 module_param(dvb_powerdown_on_sleep, int, 0644);
  67 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  68 module_param(dvb_mfe_wait_time, int, 0644);
  69 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)");
  70
  71 #define FESTATE_IDLE 1
  72 #define FESTATE_RETUNE 2
  73 #define FESTATE_TUNING_FAST 4
  74 #define FESTATE_TUNING_SLOW 8
  75 #define FESTATE_TUNED 16
  76 #define FESTATE_ZIGZAG_FAST 32
  77 #define FESTATE_ZIGZAG_SLOW 64
  78 #define FESTATE_DISEQC 128
  79 #define FESTATE_ERROR 256
  80 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  81 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  82 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  83 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  84
  85 /*
  86  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  87  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  88  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  89  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  90  * FESTATE_TUNED. The frontend has successfully locked on.
  91  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  92  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  93  * FESTATE_DISEQC. A DISEQC command has just been issued.
  94  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  95  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  96  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  97  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  98  */
  99
 100 static DEFINE_MUTEX(frontend_mutex);
 101
 102 struct dvb_frontend_private {
 103         struct kref refcount;
 104
 105         /* thread/frontend values */
 106         struct dvb_device *dvbdev;
 107         struct dvb_frontend_parameters parameters_out;
 108         struct dvb_fe_events events;
 109         struct semaphore sem;
 110         struct list_head list_head;
 111         wait_queue_head_t wait_queue;
 112         struct task_struct *thread;
 113         unsigned long release_jiffies;
 114         unsigned int wakeup;
 115         enum fe_status status;
 116         unsigned long tune_mode_flags;
 117         unsigned int delay;
 118         unsigned int reinitialise;
 119         int tone;
 120         int voltage;
 121
 122         /* swzigzag values */
 123         unsigned int state;
 124         unsigned int bending;
 125         int lnb_drift;
 126         unsigned int inversion;
 127         unsigned int auto_step;
 128         unsigned int auto_sub_step;
 129         unsigned int started_auto_step;
 130         unsigned int min_delay;
 131         unsigned int max_drift;
 132         unsigned int step_size;
 133         int quality;
 134         unsigned int check_wrapped;
 135         enum dvbfe_search algo_status;
 136
 137 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
 138         struct media_pipeline pipe;
 139 #endif
 140 };
 141
 142 static void dvb_frontend_private_free(struct kref *ref)
 143 {
 144         struct dvb_frontend_private *fepriv =
 145                 container_of(ref, struct dvb_frontend_private, refcount);
 146         kfree(fepriv);
 147 }
 148
 149 static void dvb_frontend_private_put(struct dvb_frontend_private *fepriv)
 150 {
 151         kref_put(&fepriv->refcount, dvb_frontend_private_free);
 152 }
 153
 154 static void dvb_frontend_private_get(struct dvb_frontend_private *fepriv)
 155 {
 156         kref_get(&fepriv->refcount);
 157 }
 158
 159 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 160 static int dtv_get_frontend(struct dvb_frontend *fe,
 161                             struct dtv_frontend_properties *c,
 162                             struct dvb_frontend_parameters *p_out);
 163 static int
 164 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 165                                 const struct dtv_frontend_properties *c,
 166                                 struct dvb_frontend_parameters *p);
 167
 168 static bool has_get_frontend(struct dvb_frontend *fe)
 169 {
 170         return fe->ops.get_frontend != NULL;
 171 }
 172
 173 /*
 174  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 175  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 176  * otherwise, a DVBv3 call will fail.
 177  */
 178 enum dvbv3_emulation_type {
 179         DVBV3_UNKNOWN,
 180         DVBV3_QPSK,
 181         DVBV3_QAM,
 182         DVBV3_OFDM,
 183         DVBV3_ATSC,
 184 };
 185
 186 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 187 {
 188         switch (delivery_system) {
 189         case SYS_DVBC_ANNEX_A:
 190         case SYS_DVBC_ANNEX_C:
 191                 return DVBV3_QAM;
 192         case SYS_DVBS:
 193         case SYS_DVBS2:
 194         case SYS_TURBO:
 195         case SYS_ISDBS:
 196         case SYS_DSS:
 197                 return DVBV3_QPSK;
 198         case SYS_DVBT:
 199         case SYS_DVBT2:
 200         case SYS_ISDBT:
 201         case SYS_DTMB:
 202                 return DVBV3_OFDM;
 203         case SYS_ATSC:
 204         case SYS_ATSCMH:
 205         case SYS_DVBC_ANNEX_B:
 206                 return DVBV3_ATSC;
 207         case SYS_UNDEFINED:
 208         case SYS_ISDBC:
 209         case SYS_DVBH:
 210         case SYS_DAB:
 211         default:
 212                 /*
 213                  * Doesn't know how to emulate those types and/or
 214                  * there's no frontend driver from this type yet
 215                  * with some emulation code, so, we're not sure yet how
 216                  * to handle them, or they're not compatible with a DVBv3 call.
 217                  */
 218                 return DVBV3_UNKNOWN;
 219         }
 220 }
 221
 222 static void dvb_frontend_add_event(struct dvb_frontend *fe,
 223                                    enum fe_status status)
 224 {
 225         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 226         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 227         struct dvb_fe_events *events = &fepriv->events;
 228         struct dvb_frontend_event *e;
 229         int wp;
 230
 231         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 232
 233         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 234                 dtv_get_frontend(fe, c, &fepriv->parameters_out);
 235
 236         mutex_lock(&events->mtx);
 237
 238         wp = (events->eventw + 1) % MAX_EVENT;
 239         if (wp == events->eventr) {
 240                 events->overflow = 1;
 241                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 242         }
 243
 244         e = &events->events[events->eventw];
 245         e->status = status;
 246         e->parameters = fepriv->parameters_out;
 247
 248         events->eventw = wp;
 249
 250         mutex_unlock(&events->mtx);
 251
 252         wake_up_interruptible (&events->wait_queue);
 253 }
 254
 255 static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv,
 256                                    struct dvb_fe_events *events)
 257 {
 258         int ret;
 259
 260         up(&fepriv->sem);
 261         ret = events->eventw != events->eventr;
 262         down(&fepriv->sem);
 263
 264         return ret;
 265 }
 266
 267 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 268                                   struct dvb_frontend_event *event, int flags)
 269 {
 270         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 271         struct dvb_fe_events *events = &fepriv->events;
 272
 273         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 274
 275         if (events->overflow) {
 276                 events->overflow = 0;
 277                 return -EOVERFLOW;
 278         }
 279
 280         if (events->eventw == events->eventr) {
 281                 int ret;
 282
 283                 if (flags & O_NONBLOCK)
 284                         return -EWOULDBLOCK;
 285
 286                 ret = wait_event_interruptible(events->wait_queue,
 287                                                dvb_frontend_test_event(fepriv, events));
 288
 289                 if (ret < 0)
 290                         return ret;
 291         }
 292
 293         mutex_lock(&events->mtx);
 294         *event = events->events[events->eventr];
 295         events->eventr = (events->eventr + 1) % MAX_EVENT;
 296         mutex_unlock(&events->mtx);
 297
 298         return 0;
 299 }
 300
 301 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 302 {
 303         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 304         struct dvb_fe_events *events = &fepriv->events;
 305
 306         mutex_lock(&events->mtx);
 307         events->eventr = events->eventw;
 308         mutex_unlock(&events->mtx);
 309 }
 310
 311 static void dvb_frontend_init(struct dvb_frontend *fe)
 312 {
 313         dev_dbg(fe->dvb->device,
 314                         "%s: initialising adapter %i frontend %i (%s)...\n",
 315                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 316
 317         if (fe->ops.init)
 318                 fe->ops.init(fe);
 319         if (fe->ops.tuner_ops.init) {
 320                 if (fe->ops.i2c_gate_ctrl)
 321                         fe->ops.i2c_gate_ctrl(fe, 1);
 322                 fe->ops.tuner_ops.init(fe);
 323                 if (fe->ops.i2c_gate_ctrl)
 324                         fe->ops.i2c_gate_ctrl(fe, 0);
 325         }
 326 }
 327
 328 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 329 {
 330         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 331
 332         fepriv->reinitialise = 1;
 333         dvb_frontend_wakeup(fe);
 334 }
 335 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 336
 337 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 338 {
 339         int q2;
 340         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 341
 342         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 343
 344         if (locked)
 345                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 346         else
 347                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 348
 349         q2 = fepriv->quality - 128;
 350         q2 *= q2;
 351
 352         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 353 }
 354
 355 /**
 356  * Performs automatic twiddling of frontend parameters.
 357  *
 358  * @param fe The frontend concerned.
 359  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 360  * @returns Number of complete iterations that have been performed.
 361  */
 362 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 363 {
 364         int autoinversion;
 365         int ready = 0;
 366         int fe_set_err = 0;
 367         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 368         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 369         int original_inversion = c->inversion;
 370         u32 original_frequency = c->frequency;
 371
 372         /* are we using autoinversion? */
 373         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 374                          (c->inversion == INVERSION_AUTO));
 375
 376         /* setup parameters correctly */
 377         while(!ready) {
 378                 /* calculate the lnb_drift */
 379                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 380
 381                 /* wrap the auto_step if we've exceeded the maximum drift */
 382                 if (fepriv->lnb_drift > fepriv->max_drift) {
 383                         fepriv->auto_step = 0;
 384                         fepriv->auto_sub_step = 0;
 385                         fepriv->lnb_drift = 0;
 386                 }
 387
 388                 /* perform inversion and +/- zigzag */
 389                 switch(fepriv->auto_sub_step) {
 390                 case 0:
 391                         /* try with the current inversion and current drift setting */
 392                         ready = 1;
 393                         break;
 394
 395                 case 1:
 396                         if (!autoinversion) break;
 397
 398                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 399                         ready = 1;
 400                         break;
 401
 402                 case 2:
 403                         if (fepriv->lnb_drift == 0) break;
 404
 405                         fepriv->lnb_drift = -fepriv->lnb_drift;
 406                         ready = 1;
 407                         break;
 408
 409                 case 3:
 410                         if (fepriv->lnb_drift == 0) break;
 411                         if (!autoinversion) break;
 412
 413                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 414                         fepriv->lnb_drift = -fepriv->lnb_drift;
 415                         ready = 1;
 416                         break;
 417
 418                 default:
 419                         fepriv->auto_step++;
 420                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 421                         break;
 422                 }
 423
 424                 if (!ready) fepriv->auto_sub_step++;
 425         }
 426
 427         /* if this attempt would hit where we started, indicate a complete
 428          * iteration has occurred */
 429         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 430             (fepriv->auto_sub_step == 0) && check_wrapped) {
 431                 return 1;
 432         }
 433
 434         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 435                         "auto_sub_step:%i started_auto_step:%i\n",
 436                         __func__, fepriv->lnb_drift, fepriv->inversion,
 437                         fepriv->auto_step, fepriv->auto_sub_step,
 438                         fepriv->started_auto_step);
 439
 440         /* set the frontend itself */
 441         c->frequency += fepriv->lnb_drift;
 442         if (autoinversion)
 443                 c->inversion = fepriv->inversion;
 444         tmp = *c;
 445         if (fe->ops.set_frontend)
 446                 fe_set_err = fe->ops.set_frontend(fe);
 447         *c = tmp;
 448         if (fe_set_err < 0) {
 449                 fepriv->state = FESTATE_ERROR;
 450                 return fe_set_err;
 451         }
 452
 453         c->frequency = original_frequency;
 454         c->inversion = original_inversion;
 455
 456         fepriv->auto_sub_step++;
 457         return 0;
 458 }
 459
 460 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 461 {
 462         enum fe_status s = FE_NONE;
 463         int retval = 0;
 464         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 465         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 466
 467         /* if we've got no parameters, just keep idling */
 468         if (fepriv->state & FESTATE_IDLE) {
 469                 fepriv->delay = 3*HZ;
 470                 fepriv->quality = 0;
 471                 return;
 472         }
 473
 474         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 475         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 476                 if (fepriv->state & FESTATE_RETUNE) {
 477                         tmp = *c;
 478                         if (fe->ops.set_frontend)
 479                                 retval = fe->ops.set_frontend(fe);
 480                         *c = tmp;
 481                         if (retval < 0)
 482                                 fepriv->state = FESTATE_ERROR;
 483                         else
 484                                 fepriv->state = FESTATE_TUNED;
 485                 }
 486                 fepriv->delay = 3*HZ;
 487                 fepriv->quality = 0;
 488                 return;
 489         }
 490
 491         /* get the frontend status */
 492         if (fepriv->state & FESTATE_RETUNE) {
 493                 s = 0;
 494         } else {
 495                 if (fe->ops.read_status)
 496                         fe->ops.read_status(fe, &s);
 497                 if (s != fepriv->status) {
 498                         dvb_frontend_add_event(fe, s);
 499                         fepriv->status = s;
 500                 }
 501         }
 502
 503         /* if we're not tuned, and we have a lock, move to the TUNED state */
 504         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 505                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 506                 fepriv->state = FESTATE_TUNED;
 507
 508                 /* if we're tuned, then we have determined the correct inversion */
 509                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 510                     (c->inversion == INVERSION_AUTO)) {
 511                         c->inversion = fepriv->inversion;
 512                 }
 513                 return;
 514         }
 515
 516         /* if we are tuned already, check we're still locked */
 517         if (fepriv->state & FESTATE_TUNED) {
 518                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 519
 520                 /* we're tuned, and the lock is still good... */
 521                 if (s & FE_HAS_LOCK) {
 522                         return;
 523                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 524                         fepriv->state = FESTATE_ZIGZAG_FAST;
 525                         fepriv->started_auto_step = fepriv->auto_step;
 526                         fepriv->check_wrapped = 0;
 527                 }
 528         }
 529
 530         /* don't actually do anything if we're in the LOSTLOCK state,
 531          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 532         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 533             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 534                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 535                 return;
 536         }
 537
 538         /* don't do anything if we're in the DISEQC state, since this
 539          * might be someone with a motorized dish controlled by DISEQC.
 540          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 541         if (fepriv->state & FESTATE_DISEQC) {
 542                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 543                 return;
 544         }
 545
 546         /* if we're in the RETUNE state, set everything up for a brand
 547          * new scan, keeping the current inversion setting, as the next
 548          * tune is _very_ likely to require the same */
 549         if (fepriv->state & FESTATE_RETUNE) {
 550                 fepriv->lnb_drift = 0;
 551                 fepriv->auto_step = 0;
 552                 fepriv->auto_sub_step = 0;
 553                 fepriv->started_auto_step = 0;
 554                 fepriv->check_wrapped = 0;
 555         }
 556
 557         /* fast zigzag. */
 558         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 559                 fepriv->delay = fepriv->min_delay;
 560
 561                 /* perform a tune */
 562                 retval = dvb_frontend_swzigzag_autotune(fe,
 563                                                         fepriv->check_wrapped);
 564                 if (retval < 0) {
 565                         return;
 566                 } else if (retval) {
 567                         /* OK, if we've run out of trials at the fast speed.
 568                          * Drop back to slow for the _next_ attempt */
 569                         fepriv->state = FESTATE_SEARCHING_SLOW;
 570                         fepriv->started_auto_step = fepriv->auto_step;
 571                         return;
 572                 }
 573                 fepriv->check_wrapped = 1;
 574
 575                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 576                  * This ensures we cannot return from an
 577                  * FE_SET_FRONTEND ioctl before the first frontend tune
 578                  * occurs */
 579                 if (fepriv->state & FESTATE_RETUNE) {
 580                         fepriv->state = FESTATE_TUNING_FAST;
 581                 }
 582         }
 583
 584         /* slow zigzag */
 585         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 586                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 587
 588                 /* Note: don't bother checking for wrapping; we stay in this
 589                  * state until we get a lock */
 590                 dvb_frontend_swzigzag_autotune(fe, 0);
 591         }
 592 }
 593
 594 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 595 {
 596         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 597
 598         if (fe->exit != DVB_FE_NO_EXIT)
 599                 return 1;
 600
 601         if (fepriv->dvbdev->writers == 1)
 602                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 603                                   dvb_shutdown_timeout * HZ))
 604                         return 1;
 605
 606         return 0;
 607 }
 608
 609 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 610 {
 611         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 612
 613         if (fepriv->wakeup) {
 614                 fepriv->wakeup = 0;
 615                 return 1;
 616         }
 617         return dvb_frontend_is_exiting(fe);
 618 }
 619
 620 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 621 {
 622         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 623
 624         fepriv->wakeup = 1;
 625         wake_up_interruptible(&fepriv->wait_queue);
 626 }
 627
 628 static int dvb_frontend_thread(void *data)
 629 {
 630         struct dvb_frontend *fe = data;
 631         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 632         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 633         enum fe_status s = FE_NONE;
 634         enum dvbfe_algo algo;
 635         bool re_tune = false;
 636         bool semheld = false;
 637
 638         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 639
 640         fepriv->check_wrapped = 0;
 641         fepriv->quality = 0;
 642         fepriv->delay = 3*HZ;
 643         fepriv->status = 0;
 644         fepriv->wakeup = 0;
 645         fepriv->reinitialise = 0;
 646
 647         dvb_frontend_init(fe);
 648
 649         set_freezable();
 650         while (1) {
 651                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 652 restart:
 653                 wait_event_interruptible_timeout(fepriv->wait_queue,
 654                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 655                                 || freezing(current),
 656                         fepriv->delay);
 657
 658                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 659                         /* got signal or quitting */
 660                         if (!down_interruptible(&fepriv->sem))
 661                                 semheld = true;
 662                         fe->exit = DVB_FE_NORMAL_EXIT;
 663                         break;
 664                 }
 665
 666                 if (try_to_freeze())
 667                         goto restart;
 668
 669                 if (down_interruptible(&fepriv->sem))
 670                         break;
 671
 672                 if (fepriv->reinitialise) {
 673                         dvb_frontend_init(fe);
 674                         if (fe->ops.set_tone && fepriv->tone != -1)
 675                                 fe->ops.set_tone(fe, fepriv->tone);
 676                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 677                                 fe->ops.set_voltage(fe, fepriv->voltage);
 678                         fepriv->reinitialise = 0;
 679                 }
 680
 681                 /* do an iteration of the tuning loop */
 682                 if (fe->ops.get_frontend_algo) {
 683                         algo = fe->ops.get_frontend_algo(fe);
 684                         switch (algo) {
 685                         case DVBFE_ALGO_HW:
 686                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 687
 688                                 if (fepriv->state & FESTATE_RETUNE) {
 689                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 690                                         re_tune = true;
 691                                         fepriv->state = FESTATE_TUNED;
 692                                 } else {
 693                                         re_tune = false;
 694                                 }
 695
 696                                 if (fe->ops.tune)
 697                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 698
 699                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 700                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 701                                         dvb_frontend_add_event(fe, s);
 702                                         fepriv->status = s;
 703                                 }
 704                                 break;
 705                         case DVBFE_ALGO_SW:
 706                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 707                                 dvb_frontend_swzigzag(fe);
 708                                 break;
 709                         case DVBFE_ALGO_CUSTOM:
 710                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 711                                 if (fepriv->state & FESTATE_RETUNE) {
 712                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 713                                         fepriv->state = FESTATE_TUNED;
 714                                 }
 715                                 /* Case where we are going to search for a carrier
 716                                  * User asked us to retune again for some reason, possibly
 717                                  * requesting a search with a new set of parameters
 718                                  */
 719                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 720                                         if (fe->ops.search) {
 721                                                 fepriv->algo_status = fe->ops.search(fe);
 722                                                 /* We did do a search as was requested, the flags are
 723                                                  * now unset as well and has the flags wrt to search.
 724                                                  */
 725                                         } else {
 726                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 727                                         }
 728                                 }
 729                                 /* Track the carrier if the search was successful */
 730                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 731                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 732                                         fepriv->delay = HZ / 2;
 733                                 }
 734                                 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
 735                                 fe->ops.read_status(fe, &s);
 736                                 if (s != fepriv->status) {
 737                                         dvb_frontend_add_event(fe, s); /* update event list */
 738                                         fepriv->status = s;
 739                                         if (!(s & FE_HAS_LOCK)) {
 740                                                 fepriv->delay = HZ / 10;
 741                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 742                                         } else {
 743                                                 fepriv->delay = 60 * HZ;
 744                                         }
 745                                 }
 746                                 break;
 747                         default:
 748                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 749                                 break;
 750                         }
 751                 } else {
 752                         dvb_frontend_swzigzag(fe);
 753                 }
 754         }
 755
 756         if (dvb_powerdown_on_sleep) {
 757                 if (fe->ops.set_voltage)
 758                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 759                 if (fe->ops.tuner_ops.sleep) {
 760                         if (fe->ops.i2c_gate_ctrl)
 761                                 fe->ops.i2c_gate_ctrl(fe, 1);
 762                         fe->ops.tuner_ops.sleep(fe);
 763                         if (fe->ops.i2c_gate_ctrl)
 764                                 fe->ops.i2c_gate_ctrl(fe, 0);
 765                 }
 766                 if (fe->ops.sleep)
 767                         fe->ops.sleep(fe);
 768         }
 769
 770         fepriv->thread = NULL;
 771         if (kthread_should_stop())
 772                 fe->exit = DVB_FE_DEVICE_REMOVED;
 773         else
 774                 fe->exit = DVB_FE_NO_EXIT;
 775         mb();
 776
 777         if (semheld)
 778                 up(&fepriv->sem);
 779         dvb_frontend_wakeup(fe);
 780         return 0;
 781 }
 782
 783 static void dvb_frontend_stop(struct dvb_frontend *fe)
 784 {
 785         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 786
 787         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 788
 789         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 790                 fe->exit = DVB_FE_NORMAL_EXIT;
 791         mb();
 792
 793         if (!fepriv->thread)
 794                 return;
 795
 796         kthread_stop(fepriv->thread);
 797
 798         sema_init(&fepriv->sem, 1);
 799         fepriv->state = FESTATE_IDLE;
 800
 801         /* paranoia check in case a signal arrived */
 802         if (fepriv->thread)
 803                 dev_warn(fe->dvb->device,
 804                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 805                                 fepriv->thread);
 806 }
 807
 808 /*
 809  * Sleep for the amount of time given by add_usec parameter
 810  *
 811  * This needs to be as precise as possible, as it affects the detection of
 812  * the dish tone command at the satellite subsystem. The precision is improved
 813  * by using a scheduled msleep followed by udelay for the remainder.
 814  */
 815 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
 816 {
 817         s32 delta;
 818
 819         *waketime = ktime_add_us(*waketime, add_usec);
 820         delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 821         if (delta > 2500) {
 822                 msleep((delta - 1500) / 1000);
 823                 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 824         }
 825         if (delta > 0)
 826                 udelay(delta);
 827 }
 828 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 829
 830 static int dvb_frontend_start(struct dvb_frontend *fe)
 831 {
 832         int ret;
 833         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 834         struct task_struct *fe_thread;
 835
 836         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 837
 838         if (fepriv->thread) {
 839                 if (fe->exit == DVB_FE_NO_EXIT)
 840                         return 0;
 841                 else
 842                         dvb_frontend_stop (fe);
 843         }
 844
 845         if (signal_pending(current))
 846                 return -EINTR;
 847         if (down_interruptible (&fepriv->sem))
 848                 return -EINTR;
 849
 850         fepriv->state = FESTATE_IDLE;
 851         fe->exit = DVB_FE_NO_EXIT;
 852         fepriv->thread = NULL;
 853         mb();
 854
 855         fe_thread = kthread_run(dvb_frontend_thread, fe,
 856                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 857         if (IS_ERR(fe_thread)) {
 858                 ret = PTR_ERR(fe_thread);
 859                 dev_warn(fe->dvb->device,
 860                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 861                                 ret);
 862                 up(&fepriv->sem);
 863                 return ret;
 864         }
 865         fepriv->thread = fe_thread;
 866         return 0;
 867 }
 868
 869 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 870                                         u32 *freq_min, u32 *freq_max)
 871 {
 872         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 873
 874         if (fe->ops.info.frequency_max == 0)
 875                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 876         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 877                 *freq_max = fe->ops.info.frequency_max;
 878         else
 879                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 880
 881         if (*freq_min == 0 || *freq_max == 0)
 882                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 883                                 fe->dvb->num, fe->id);
 884 }
 885
 886 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 887 {
 888         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 889         u32 freq_min;
 890         u32 freq_max;
 891
 892         /* range check: frequency */
 893         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 894         if ((freq_min && c->frequency < freq_min) ||
 895             (freq_max && c->frequency > freq_max)) {
 896                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 897                                 fe->dvb->num, fe->id, c->frequency,
 898                                 freq_min, freq_max);
 899                 return -EINVAL;
 900         }
 901
 902         /* range check: symbol rate */
 903         switch (c->delivery_system) {
 904         case SYS_DVBS:
 905         case SYS_DVBS2:
 906         case SYS_TURBO:
 907         case SYS_DVBC_ANNEX_A:
 908         case SYS_DVBC_ANNEX_C:
 909                 if ((fe->ops.info.symbol_rate_min &&
 910                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 911                     (fe->ops.info.symbol_rate_max &&
 912                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 913                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 914                                         fe->dvb->num, fe->id, c->symbol_rate,
 915                                         fe->ops.info.symbol_rate_min,
 916                                         fe->ops.info.symbol_rate_max);
 917                         return -EINVAL;
 918                 }
 919         default:
 920                 break;
 921         }
 922
 923         return 0;
 924 }
 925
 926 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 927 {
 928         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 929         int i;
 930         u32 delsys;
 931
 932         delsys = c->delivery_system;
 933         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
 934         c->delivery_system = delsys;
 935
 936         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
 937                         __func__, c->delivery_system);
 938
 939         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 940         c->bandwidth_hz = 0;    /* AUTO */
 941         c->guard_interval = GUARD_INTERVAL_AUTO;
 942         c->hierarchy = HIERARCHY_AUTO;
 943         c->symbol_rate = 0;
 944         c->code_rate_HP = FEC_AUTO;
 945         c->code_rate_LP = FEC_AUTO;
 946         c->fec_inner = FEC_AUTO;
 947         c->rolloff = ROLLOFF_AUTO;
 948         c->voltage = SEC_VOLTAGE_OFF;
 949         c->sectone = SEC_TONE_OFF;
 950         c->pilot = PILOT_AUTO;
 951
 952         c->isdbt_partial_reception = 0;
 953         c->isdbt_sb_mode = 0;
 954         c->isdbt_sb_subchannel = 0;
 955         c->isdbt_sb_segment_idx = 0;
 956         c->isdbt_sb_segment_count = 0;
 957         c->isdbt_layer_enabled = 0;
 958         for (i = 0; i < 3; i++) {
 959                 c->layer[i].fec = FEC_AUTO;
 960                 c->layer[i].modulation = QAM_AUTO;
 961                 c->layer[i].interleaving = 0;
 962                 c->layer[i].segment_count = 0;
 963         }
 964
 965         c->stream_id = NO_STREAM_ID_FILTER;
 966
 967         switch (c->delivery_system) {
 968         case SYS_DVBS:
 969         case SYS_DVBS2:
 970         case SYS_TURBO:
 971                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 972                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 973                 break;
 974         case SYS_ATSC:
 975                 c->modulation = VSB_8;
 976                 break;
 977         case SYS_ISDBS:
 978                 c->symbol_rate = 28860000;
 979                 c->rolloff = ROLLOFF_35;
 980                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
 981                 break;
 982         default:
 983                 c->modulation = QAM_AUTO;
 984                 break;
 985         }
 986
 987         c->lna = LNA_AUTO;
 988
 989         return 0;
 990 }
 991
 992 #define _DTV_CMD(n, s, b) \
 993 [n] = { \
 994         .name = #n, \
 995         .cmd  = n, \
 996         .set  = s,\
 997         .buffer = b \
 998 }
 999
1000 struct dtv_cmds_h {
1001         char    *name;          /* A display name for debugging purposes */
1002
1003         __u32   cmd;            /* A unique ID */
1004
1005         /* Flags */
1006         __u32   set:1;          /* Either a set or get property */
1007         __u32   buffer:1;       /* Does this property use the buffer? */
1008         __u32   reserved:30;    /* Align */
1009 };
1010
1011 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1012         _DTV_CMD(DTV_TUNE, 1, 0),
1013         _DTV_CMD(DTV_CLEAR, 1, 0),
1014
1015         /* Set */
1016         _DTV_CMD(DTV_FREQUENCY, 1, 0),
1017         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1018         _DTV_CMD(DTV_MODULATION, 1, 0),
1019         _DTV_CMD(DTV_INVERSION, 1, 0),
1020         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1021         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1022         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1023         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1024         _DTV_CMD(DTV_TONE, 1, 0),
1025         _DTV_CMD(DTV_PILOT, 1, 0),
1026         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1027         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1028         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1029         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1030         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1031         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1032         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1033         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1034
1035         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1036         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1037         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1038         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1039         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1040         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1041         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1042         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1043         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1044         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1045         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1046         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1047         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1048         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1049         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1050         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1051         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1052         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1053
1054         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1055         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1056         _DTV_CMD(DTV_LNA, 1, 0),
1057
1058         /* Get */
1059         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1060         _DTV_CMD(DTV_API_VERSION, 0, 0),
1061
1062         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1063
1064         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1065         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1066
1067         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1068         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1069         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1070         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1071         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1072         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1073         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1074         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1075         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1076         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1077         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1078         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1079         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1080
1081         /* Statistics API */
1082         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1083         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1084         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1085         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1086         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1087         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1088         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1089         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1090 };
1091
1092 static void dtv_get_property_dump(struct dvb_frontend *fe,
1093                               struct dtv_property *tvp)
1094 {
1095         int i;
1096
1097         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1098                 dev_warn(fe->dvb->device, "%s: GET tvp.cmd = 0x%08x undefined\n"
1099                                 , __func__,
1100                                 tvp->cmd);
1101                 return;
1102         }
1103
1104         dev_dbg(fe->dvb->device, "%s: GET tvp.cmd    = 0x%08x (%s)\n", __func__,
1105                 tvp->cmd,
1106                 dtv_cmds[tvp->cmd].name);
1107
1108         if (dtv_cmds[tvp->cmd].buffer) {
1109                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1110                         __func__, tvp->u.buffer.len);
1111
1112                 for(i = 0; i < tvp->u.buffer.len; i++)
1113                         dev_dbg(fe->dvb->device,
1114                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1115                                         __func__, i, tvp->u.buffer.data[i]);
1116         } else {
1117                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1118                                 tvp->u.data);
1119         }
1120 }
1121
1122 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1123  * drivers can use a single set_frontend tuning function, regardless of whether
1124  * it's being used for the legacy or new API, reducing code and complexity.
1125  */
1126 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1127                                    struct dtv_frontend_properties *c,
1128                                    const struct dvb_frontend_parameters *p)
1129 {
1130         c->frequency = p->frequency;
1131         c->inversion = p->inversion;
1132
1133         switch (dvbv3_type(c->delivery_system)) {
1134         case DVBV3_QPSK:
1135                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1136                 c->symbol_rate = p->u.qpsk.symbol_rate;
1137                 c->fec_inner = p->u.qpsk.fec_inner;
1138                 break;
1139         case DVBV3_QAM:
1140                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1141                 c->symbol_rate = p->u.qam.symbol_rate;
1142                 c->fec_inner = p->u.qam.fec_inner;
1143                 c->modulation = p->u.qam.modulation;
1144                 break;
1145         case DVBV3_OFDM:
1146                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1147
1148                 switch (p->u.ofdm.bandwidth) {
1149                 case BANDWIDTH_10_MHZ:
1150                         c->bandwidth_hz = 10000000;
1151                         break;
1152                 case BANDWIDTH_8_MHZ:
1153                         c->bandwidth_hz = 8000000;
1154                         break;
1155                 case BANDWIDTH_7_MHZ:
1156                         c->bandwidth_hz = 7000000;
1157                         break;
1158                 case BANDWIDTH_6_MHZ:
1159                         c->bandwidth_hz = 6000000;
1160                         break;
1161                 case BANDWIDTH_5_MHZ:
1162                         c->bandwidth_hz = 5000000;
1163                         break;
1164                 case BANDWIDTH_1_712_MHZ:
1165                         c->bandwidth_hz = 1712000;
1166                         break;
1167                 case BANDWIDTH_AUTO:
1168                         c->bandwidth_hz = 0;
1169                 }
1170
1171                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1172                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1173                 c->modulation = p->u.ofdm.constellation;
1174                 c->transmission_mode = p->u.ofdm.transmission_mode;
1175                 c->guard_interval = p->u.ofdm.guard_interval;
1176                 c->hierarchy = p->u.ofdm.hierarchy_information;
1177                 break;
1178         case DVBV3_ATSC:
1179                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1180                 c->modulation = p->u.vsb.modulation;
1181                 if (c->delivery_system == SYS_ATSCMH)
1182                         break;
1183                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1184                         c->delivery_system = SYS_ATSC;
1185                 else
1186                         c->delivery_system = SYS_DVBC_ANNEX_B;
1187                 break;
1188         case DVBV3_UNKNOWN:
1189                 dev_err(fe->dvb->device,
1190                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1191                                 __func__, c->delivery_system);
1192                 return -EINVAL;
1193         }
1194
1195         return 0;
1196 }
1197
1198 /* Ensure the cached values are set correctly in the frontend
1199  * legacy tuning structures, for the advanced tuning API.
1200  */
1201 static int
1202 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1203                                 const struct dtv_frontend_properties *c,
1204                                 struct dvb_frontend_parameters *p)
1205 {
1206         p->frequency = c->frequency;
1207         p->inversion = c->inversion;
1208
1209         switch (dvbv3_type(c->delivery_system)) {
1210         case DVBV3_UNKNOWN:
1211                 dev_err(fe->dvb->device,
1212                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1213                                 __func__, c->delivery_system);
1214                 return -EINVAL;
1215         case DVBV3_QPSK:
1216                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1217                 p->u.qpsk.symbol_rate = c->symbol_rate;
1218                 p->u.qpsk.fec_inner = c->fec_inner;
1219                 break;
1220         case DVBV3_QAM:
1221                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1222                 p->u.qam.symbol_rate = c->symbol_rate;
1223                 p->u.qam.fec_inner = c->fec_inner;
1224                 p->u.qam.modulation = c->modulation;
1225                 break;
1226         case DVBV3_OFDM:
1227                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1228                 switch (c->bandwidth_hz) {
1229                 case 10000000:
1230                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1231                         break;
1232                 case 8000000:
1233                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1234                         break;
1235                 case 7000000:
1236                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1237                         break;
1238                 case 6000000:
1239                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1240                         break;
1241                 case 5000000:
1242                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1243                         break;
1244                 case 1712000:
1245                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1246                         break;
1247                 case 0:
1248                 default:
1249                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1250                 }
1251                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1252                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1253                 p->u.ofdm.constellation = c->modulation;
1254                 p->u.ofdm.transmission_mode = c->transmission_mode;
1255                 p->u.ofdm.guard_interval = c->guard_interval;
1256                 p->u.ofdm.hierarchy_information = c->hierarchy;
1257                 break;
1258         case DVBV3_ATSC:
1259                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1260                 p->u.vsb.modulation = c->modulation;
1261                 break;
1262         }
1263         return 0;
1264 }
1265
1266 /**
1267  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1268  * @fe:         struct dvb_frontend pointer
1269  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1270  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1271  *
1272  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1273  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1274  * If p_out is not null, it will update the DVBv3 params pointed by it.
1275  */
1276 static int dtv_get_frontend(struct dvb_frontend *fe,
1277                             struct dtv_frontend_properties *c,
1278                             struct dvb_frontend_parameters *p_out)
1279 {
1280         int r;
1281
1282         if (fe->ops.get_frontend) {
1283                 r = fe->ops.get_frontend(fe, c);
1284                 if (unlikely(r < 0))
1285                         return r;
1286                 if (p_out)
1287                         dtv_property_legacy_params_sync(fe, c, p_out);
1288                 return 0;
1289         }
1290
1291         /* As everything is in cache, get_frontend fops are always supported */
1292         return 0;
1293 }
1294
1295 static int dvb_frontend_handle_ioctl(struct file *file,
1296                                      unsigned int cmd, void *parg);
1297
1298 static int dtv_property_process_get(struct dvb_frontend *fe,
1299                                     const struct dtv_frontend_properties *c,
1300                                     struct dtv_property *tvp,
1301                                     struct file *file)
1302 {
1303         int ncaps;
1304
1305         switch(tvp->cmd) {
1306         case DTV_ENUM_DELSYS:
1307                 ncaps = 0;
1308                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1309                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1310                         ncaps++;
1311                 }
1312                 tvp->u.buffer.len = ncaps;
1313                 break;
1314         case DTV_FREQUENCY:
1315                 tvp->u.data = c->frequency;
1316                 break;
1317         case DTV_MODULATION:
1318                 tvp->u.data = c->modulation;
1319                 break;
1320         case DTV_BANDWIDTH_HZ:
1321                 tvp->u.data = c->bandwidth_hz;
1322                 break;
1323         case DTV_INVERSION:
1324                 tvp->u.data = c->inversion;
1325                 break;
1326         case DTV_SYMBOL_RATE:
1327                 tvp->u.data = c->symbol_rate;
1328                 break;
1329         case DTV_INNER_FEC:
1330                 tvp->u.data = c->fec_inner;
1331                 break;
1332         case DTV_PILOT:
1333                 tvp->u.data = c->pilot;
1334                 break;
1335         case DTV_ROLLOFF:
1336                 tvp->u.data = c->rolloff;
1337                 break;
1338         case DTV_DELIVERY_SYSTEM:
1339                 tvp->u.data = c->delivery_system;
1340                 break;
1341         case DTV_VOLTAGE:
1342                 tvp->u.data = c->voltage;
1343                 break;
1344         case DTV_TONE:
1345                 tvp->u.data = c->sectone;
1346                 break;
1347         case DTV_API_VERSION:
1348                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1349                 break;
1350         case DTV_CODE_RATE_HP:
1351                 tvp->u.data = c->code_rate_HP;
1352                 break;
1353         case DTV_CODE_RATE_LP:
1354                 tvp->u.data = c->code_rate_LP;
1355                 break;
1356         case DTV_GUARD_INTERVAL:
1357                 tvp->u.data = c->guard_interval;
1358                 break;
1359         case DTV_TRANSMISSION_MODE:
1360                 tvp->u.data = c->transmission_mode;
1361                 break;
1362         case DTV_HIERARCHY:
1363                 tvp->u.data = c->hierarchy;
1364                 break;
1365         case DTV_INTERLEAVING:
1366                 tvp->u.data = c->interleaving;
1367                 break;
1368
1369         /* ISDB-T Support here */
1370         case DTV_ISDBT_PARTIAL_RECEPTION:
1371                 tvp->u.data = c->isdbt_partial_reception;
1372                 break;
1373         case DTV_ISDBT_SOUND_BROADCASTING:
1374                 tvp->u.data = c->isdbt_sb_mode;
1375                 break;
1376         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1377                 tvp->u.data = c->isdbt_sb_subchannel;
1378                 break;
1379         case DTV_ISDBT_SB_SEGMENT_IDX:
1380                 tvp->u.data = c->isdbt_sb_segment_idx;
1381                 break;
1382         case DTV_ISDBT_SB_SEGMENT_COUNT:
1383                 tvp->u.data = c->isdbt_sb_segment_count;
1384                 break;
1385         case DTV_ISDBT_LAYER_ENABLED:
1386                 tvp->u.data = c->isdbt_layer_enabled;
1387                 break;
1388         case DTV_ISDBT_LAYERA_FEC:
1389                 tvp->u.data = c->layer[0].fec;
1390                 break;
1391         case DTV_ISDBT_LAYERA_MODULATION:
1392                 tvp->u.data = c->layer[0].modulation;
1393                 break;
1394         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1395                 tvp->u.data = c->layer[0].segment_count;
1396                 break;
1397         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1398                 tvp->u.data = c->layer[0].interleaving;
1399                 break;
1400         case DTV_ISDBT_LAYERB_FEC:
1401                 tvp->u.data = c->layer[1].fec;
1402                 break;
1403         case DTV_ISDBT_LAYERB_MODULATION:
1404                 tvp->u.data = c->layer[1].modulation;
1405                 break;
1406         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1407                 tvp->u.data = c->layer[1].segment_count;
1408                 break;
1409         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1410                 tvp->u.data = c->layer[1].interleaving;
1411                 break;
1412         case DTV_ISDBT_LAYERC_FEC:
1413                 tvp->u.data = c->layer[2].fec;
1414                 break;
1415         case DTV_ISDBT_LAYERC_MODULATION:
1416                 tvp->u.data = c->layer[2].modulation;
1417                 break;
1418         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1419                 tvp->u.data = c->layer[2].segment_count;
1420                 break;
1421         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1422                 tvp->u.data = c->layer[2].interleaving;
1423                 break;
1424
1425         /* Multistream support */
1426         case DTV_STREAM_ID:
1427         case DTV_DVBT2_PLP_ID_LEGACY:
1428                 tvp->u.data = c->stream_id;
1429                 break;
1430
1431         /* ATSC-MH */
1432         case DTV_ATSCMH_FIC_VER:
1433                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1434                 break;
1435         case DTV_ATSCMH_PARADE_ID:
1436                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1437                 break;
1438         case DTV_ATSCMH_NOG:
1439                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1440                 break;
1441         case DTV_ATSCMH_TNOG:
1442                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1443                 break;
1444         case DTV_ATSCMH_SGN:
1445                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1446                 break;
1447         case DTV_ATSCMH_PRC:
1448                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1449                 break;
1450         case DTV_ATSCMH_RS_FRAME_MODE:
1451                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1452                 break;
1453         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1454                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1455                 break;
1456         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1457                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1458                 break;
1459         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1460                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1461                 break;
1462         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1463                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1464                 break;
1465         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1466                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1467                 break;
1468         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1469                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1470                 break;
1471         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1472                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1473                 break;
1474         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1475                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1476                 break;
1477
1478         case DTV_LNA:
1479                 tvp->u.data = c->lna;
1480                 break;
1481
1482         /* Fill quality measures */
1483         case DTV_STAT_SIGNAL_STRENGTH:
1484                 tvp->u.st = c->strength;
1485                 break;
1486         case DTV_STAT_CNR:
1487                 tvp->u.st = c->cnr;
1488                 break;
1489         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1490                 tvp->u.st = c->pre_bit_error;
1491                 break;
1492         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1493                 tvp->u.st = c->pre_bit_count;
1494                 break;
1495         case DTV_STAT_POST_ERROR_BIT_COUNT:
1496                 tvp->u.st = c->post_bit_error;
1497                 break;
1498         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1499                 tvp->u.st = c->post_bit_count;
1500                 break;
1501         case DTV_STAT_ERROR_BLOCK_COUNT:
1502                 tvp->u.st = c->block_error;
1503                 break;
1504         case DTV_STAT_TOTAL_BLOCK_COUNT:
1505                 tvp->u.st = c->block_count;
1506                 break;
1507         default:
1508                 dev_dbg(fe->dvb->device,
1509                         "%s: FE property %d doesn't exist\n",
1510                         __func__, tvp->cmd);
1511                 return -EINVAL;
1512         }
1513
1514         dtv_get_property_dump(fe, tvp);
1515
1516         return 0;
1517 }
1518
1519 static int dtv_set_frontend(struct dvb_frontend *fe);
1520
1521 static bool is_dvbv3_delsys(u32 delsys)
1522 {
1523         bool status;
1524
1525         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1526                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1527
1528         return status;
1529 }
1530
1531 /**
1532  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1533  * @fe:                 struct frontend;
1534  * @delsys:                     DVBv5 type that will be used for emulation
1535  *
1536  * Provides emulation for delivery systems that are compatible with the old
1537  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1538  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1539  * parameters are compatible with DVB-S spec.
1540  */
1541 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1542 {
1543         int i;
1544         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1545
1546         c->delivery_system = delsys;
1547
1548         /*
1549          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1550          */
1551         if (c->delivery_system == SYS_ISDBT) {
1552                 dev_dbg(fe->dvb->device,
1553                         "%s: Using defaults for SYS_ISDBT\n",
1554                         __func__);
1555
1556                 if (!c->bandwidth_hz)
1557                         c->bandwidth_hz = 6000000;
1558
1559                 c->isdbt_partial_reception = 0;
1560                 c->isdbt_sb_mode = 0;
1561                 c->isdbt_sb_subchannel = 0;
1562                 c->isdbt_sb_segment_idx = 0;
1563                 c->isdbt_sb_segment_count = 0;
1564                 c->isdbt_layer_enabled = 7;
1565                 for (i = 0; i < 3; i++) {
1566                         c->layer[i].fec = FEC_AUTO;
1567                         c->layer[i].modulation = QAM_AUTO;
1568                         c->layer[i].interleaving = 0;
1569                         c->layer[i].segment_count = 0;
1570                 }
1571         }
1572         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1573                 __func__, c->delivery_system);
1574
1575         return 0;
1576 }
1577
1578 /**
1579  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1580  * @fe:                 frontend struct
1581  * @desired_system:     delivery system requested by the user
1582  *
1583  * A DVBv5 call know what's the desired system it wants. So, set it.
1584  *
1585  * There are, however, a few known issues with early DVBv5 applications that
1586  * are also handled by this logic:
1587  *
1588  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1589  *    This is an API violation, but, as we don't want to break userspace,
1590  *    convert it to the first supported delivery system.
1591  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1592  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1593  *    ISDB-T provided backward compat with DVB-T.
1594  */
1595 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1596                                      u32 desired_system)
1597 {
1598         int ncaps;
1599         u32 delsys = SYS_UNDEFINED;
1600         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1601         enum dvbv3_emulation_type type;
1602
1603         /*
1604          * It was reported that some old DVBv5 applications were
1605          * filling delivery_system with SYS_UNDEFINED. If this happens,
1606          * assume that the application wants to use the first supported
1607          * delivery system.
1608          */
1609         if (desired_system == SYS_UNDEFINED)
1610                 desired_system = fe->ops.delsys[0];
1611
1612         /*
1613          * This is a DVBv5 call. So, it likely knows the supported
1614          * delivery systems. So, check if the desired delivery system is
1615          * supported
1616          */
1617         ncaps = 0;
1618         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1619                 if (fe->ops.delsys[ncaps] == desired_system) {
1620                         c->delivery_system = desired_system;
1621                         dev_dbg(fe->dvb->device,
1622                                         "%s: Changing delivery system to %d\n",
1623                                         __func__, desired_system);
1624                         return 0;
1625                 }
1626                 ncaps++;
1627         }
1628
1629         /*
1630          * The requested delivery system isn't supported. Maybe userspace
1631          * is requesting a DVBv3 compatible delivery system.
1632          *
1633          * The emulation only works if the desired system is one of the
1634          * delivery systems supported by DVBv3 API
1635          */
1636         if (!is_dvbv3_delsys(desired_system)) {
1637                 dev_dbg(fe->dvb->device,
1638                         "%s: Delivery system %d not supported.\n",
1639                         __func__, desired_system);
1640                 return -EINVAL;
1641         }
1642
1643         type = dvbv3_type(desired_system);
1644
1645         /*
1646         * Get the last non-DVBv3 delivery system that has the same type
1647         * of the desired system
1648         */
1649         ncaps = 0;
1650         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1651                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1652                         delsys = fe->ops.delsys[ncaps];
1653                 ncaps++;
1654         }
1655
1656         /* There's nothing compatible with the desired delivery system */
1657         if (delsys == SYS_UNDEFINED) {
1658                 dev_dbg(fe->dvb->device,
1659                         "%s: Delivery system %d not supported on emulation mode.\n",
1660                         __func__, desired_system);
1661                 return -EINVAL;
1662         }
1663
1664         dev_dbg(fe->dvb->device,
1665                 "%s: Using delivery system %d emulated as if it were %d\n",
1666                 __func__, delsys, desired_system);
1667
1668         return emulate_delivery_system(fe, desired_system);
1669 }
1670
1671 /**
1672  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1673  * @fe: frontend struct
1674  *
1675  * A DVBv3 call doesn't know what's the desired system it wants. It also
1676  * doesn't allow to switch between different types. Due to that, userspace
1677  * should use DVBv5 instead.
1678  * However, in order to avoid breaking userspace API, limited backward
1679  * compatibility support is provided.
1680  *
1681  * There are some delivery systems that are incompatible with DVBv3 calls.
1682  *
1683  * This routine should work fine for frontends that support just one delivery
1684  * system.
1685  *
1686  * For frontends that support multiple frontends:
1687  * 1) It defaults to use the first supported delivery system. There's an
1688  *    userspace application that allows changing it at runtime;
1689  *
1690  * 2) If the current delivery system is not compatible with DVBv3, it gets
1691  *    the first one that it is compatible.
1692  *
1693  * NOTE: in order for this to work with applications like Kaffeine that
1694  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1695  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1696  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1697  *      to DVB-S.
1698  */
1699 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1700 {
1701         int ncaps;
1702         u32 delsys = SYS_UNDEFINED;
1703         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1704
1705         /* If not set yet, defaults to the first supported delivery system */
1706         if (c->delivery_system == SYS_UNDEFINED)
1707                 c->delivery_system = fe->ops.delsys[0];
1708
1709         /*
1710          * Trivial case: just use the current one, if it already a DVBv3
1711          * delivery system
1712          */
1713         if (is_dvbv3_delsys(c->delivery_system)) {
1714                 dev_dbg(fe->dvb->device,
1715                                 "%s: Using delivery system to %d\n",
1716                                 __func__, c->delivery_system);
1717                 return 0;
1718         }
1719
1720         /*
1721          * Seek for the first delivery system that it is compatible with a
1722          * DVBv3 standard
1723          */
1724         ncaps = 0;
1725         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1726                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1727                         delsys = fe->ops.delsys[ncaps];
1728                         break;
1729                 }
1730                 ncaps++;
1731         }
1732         if (delsys == SYS_UNDEFINED) {
1733                 dev_dbg(fe->dvb->device,
1734                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1735                         __func__);
1736                 return -EINVAL;
1737         }
1738         return emulate_delivery_system(fe, delsys);
1739 }
1740
1741 /**
1742  * dtv_property_process_set -  Sets a single DTV property
1743  * @fe:         Pointer to &struct dvb_frontend
1744  * @file:       Pointer to &struct file
1745  * @cmd:        Digital TV command
1746  * @data:       An unsigned 32-bits number
1747  *
1748  * This routine assigns the property
1749  * value to the corresponding member of
1750  * &struct dtv_frontend_properties
1751  *
1752  * Returns:
1753  * Zero on success, negative errno on failure.
1754  */
1755 static int dtv_property_process_set(struct dvb_frontend *fe,
1756                                         struct file *file,
1757                                         u32 cmd, u32 data)
1758 {
1759         int r = 0;
1760         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1761
1762         /** Dump DTV command name and value*/
1763         if (!cmd || cmd > DTV_MAX_COMMAND)
1764                 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n",
1765                                  __func__, cmd);
1766         else
1767                 dev_dbg(fe->dvb->device,
1768                                 "%s: SET cmd 0x%08x (%s) to 0x%08x\n",
1769                                 __func__, cmd, dtv_cmds[cmd].name, data);
1770         switch (cmd) {
1771         case DTV_CLEAR:
1772                 /*
1773                  * Reset a cache of data specific to the frontend here. This does
1774                  * not effect hardware.
1775                  */
1776                 dvb_frontend_clear_cache(fe);
1777                 break;
1778         case DTV_TUNE:
1779                 /*
1780                  * Use the cached Digital TV properties to tune the
1781                  * frontend
1782                  */
1783                 dev_dbg(fe->dvb->device,
1784                         "%s: Setting the frontend from property cache\n",
1785                         __func__);
1786
1787                 r = dtv_set_frontend(fe);
1788                 break;
1789         case DTV_FREQUENCY:
1790                 c->frequency = data;
1791                 break;
1792         case DTV_MODULATION:
1793                 c->modulation = data;
1794                 break;
1795         case DTV_BANDWIDTH_HZ:
1796                 c->bandwidth_hz = data;
1797                 break;
1798         case DTV_INVERSION:
1799                 c->inversion = data;
1800                 break;
1801         case DTV_SYMBOL_RATE:
1802                 c->symbol_rate = data;
1803                 break;
1804         case DTV_INNER_FEC:
1805                 c->fec_inner = data;
1806                 break;
1807         case DTV_PILOT:
1808                 c->pilot = data;
1809                 break;
1810         case DTV_ROLLOFF:
1811                 c->rolloff = data;
1812                 break;
1813         case DTV_DELIVERY_SYSTEM:
1814                 r = dvbv5_set_delivery_system(fe, data);
1815                 break;
1816         case DTV_VOLTAGE:
1817                 c->voltage = data;
1818                 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
1819                         (void *)c->voltage);
1820                 break;
1821         case DTV_TONE:
1822                 c->sectone = data;
1823                 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
1824                         (void *)c->sectone);
1825                 break;
1826         case DTV_CODE_RATE_HP:
1827                 c->code_rate_HP = data;
1828                 break;
1829         case DTV_CODE_RATE_LP:
1830                 c->code_rate_LP = data;
1831                 break;
1832         case DTV_GUARD_INTERVAL:
1833                 c->guard_interval = data;
1834                 break;
1835         case DTV_TRANSMISSION_MODE:
1836                 c->transmission_mode = data;
1837                 break;
1838         case DTV_HIERARCHY:
1839                 c->hierarchy = data;
1840                 break;
1841         case DTV_INTERLEAVING:
1842                 c->interleaving = data;
1843                 break;
1844
1845         /* ISDB-T Support here */
1846         case DTV_ISDBT_PARTIAL_RECEPTION:
1847                 c->isdbt_partial_reception = data;
1848                 break;
1849         case DTV_ISDBT_SOUND_BROADCASTING:
1850                 c->isdbt_sb_mode = data;
1851                 break;
1852         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1853                 c->isdbt_sb_subchannel = data;
1854                 break;
1855         case DTV_ISDBT_SB_SEGMENT_IDX:
1856                 c->isdbt_sb_segment_idx = data;
1857                 break;
1858         case DTV_ISDBT_SB_SEGMENT_COUNT:
1859                 c->isdbt_sb_segment_count = data;
1860                 break;
1861         case DTV_ISDBT_LAYER_ENABLED:
1862                 c->isdbt_layer_enabled = data;
1863                 break;
1864         case DTV_ISDBT_LAYERA_FEC:
1865                 c->layer[0].fec = data;
1866                 break;
1867         case DTV_ISDBT_LAYERA_MODULATION:
1868                 c->layer[0].modulation = data;
1869                 break;
1870         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1871                 c->layer[0].segment_count = data;
1872                 break;
1873         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1874                 c->layer[0].interleaving = data;
1875                 break;
1876         case DTV_ISDBT_LAYERB_FEC:
1877                 c->layer[1].fec = data;
1878                 break;
1879         case DTV_ISDBT_LAYERB_MODULATION:
1880                 c->layer[1].modulation = data;
1881                 break;
1882         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1883                 c->layer[1].segment_count = data;
1884                 break;
1885         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1886                 c->layer[1].interleaving = data;
1887                 break;
1888         case DTV_ISDBT_LAYERC_FEC:
1889                 c->layer[2].fec = data;
1890                 break;
1891         case DTV_ISDBT_LAYERC_MODULATION:
1892                 c->layer[2].modulation = data;
1893                 break;
1894         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1895                 c->layer[2].segment_count = data;
1896                 break;
1897         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1898                 c->layer[2].interleaving = data;
1899                 break;
1900
1901         /* Multistream support */
1902         case DTV_STREAM_ID:
1903         case DTV_DVBT2_PLP_ID_LEGACY:
1904                 c->stream_id = data;
1905                 break;
1906
1907         /* ATSC-MH */
1908         case DTV_ATSCMH_PARADE_ID:
1909                 fe->dtv_property_cache.atscmh_parade_id = data;
1910                 break;
1911         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1912                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data;
1913                 break;
1914
1915         case DTV_LNA:
1916                 c->lna = data;
1917                 if (fe->ops.set_lna)
1918                         r = fe->ops.set_lna(fe);
1919                 if (r < 0)
1920                         c->lna = LNA_AUTO;
1921                 break;
1922
1923         default:
1924                 return -EINVAL;
1925         }
1926
1927         return r;
1928 }
1929
1930 static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd,
1931                                  void *parg)
1932 {
1933         struct dvb_device *dvbdev = file->private_data;
1934         struct dvb_frontend *fe = dvbdev->priv;
1935         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1936         int err;
1937
1938         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1939         if (down_interruptible(&fepriv->sem))
1940                 return -ERESTARTSYS;
1941
1942         if (fe->exit != DVB_FE_NO_EXIT) {
1943                 up(&fepriv->sem);
1944                 return -ENODEV;
1945         }
1946
1947         /*
1948          * If the frontend is opened in read-only mode, only the ioctls
1949          * that don't interfere with the tune logic should be accepted.
1950          * That allows an external application to monitor the DVB QoS and
1951          * statistics parameters.
1952          *
1953          * That matches all _IOR() ioctls, except for two special cases:
1954          *   - FE_GET_EVENT is part of the tuning logic on a DVB application;
1955          *   - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0
1956          *     setup
1957          * So, those two ioctls should also return -EPERM, as otherwise
1958          * reading from them would interfere with a DVB tune application
1959          */
1960         if ((file->f_flags & O_ACCMODE) == O_RDONLY
1961             && (_IOC_DIR(cmd) != _IOC_READ
1962                 || cmd == FE_GET_EVENT
1963                 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1964                 up(&fepriv->sem);
1965                 return -EPERM;
1966         }
1967
1968         err = dvb_frontend_handle_ioctl(file, cmd, parg);
1969
1970         up(&fepriv->sem);
1971         return err;
1972 }
1973
1974 static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
1975                                unsigned long arg)
1976 {
1977         struct dvb_device *dvbdev = file->private_data;
1978
1979         if (!dvbdev)
1980                 return -ENODEV;
1981
1982         return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
1983 }
1984
1985 #ifdef CONFIG_COMPAT
1986 struct compat_dtv_property {
1987         __u32 cmd;
1988         __u32 reserved[3];
1989         union {
1990                 __u32 data;
1991                 struct dtv_fe_stats st;
1992                 struct {
1993                         __u8 data[32];
1994                         __u32 len;
1995                         __u32 reserved1[3];
1996                         compat_uptr_t reserved2;
1997                 } buffer;
1998         } u;
1999         int result;
2000 } __attribute__ ((packed));
2001
2002 struct compat_dtv_properties {
2003         __u32 num;
2004         compat_uptr_t props;
2005 };
2006
2007 #define COMPAT_FE_SET_PROPERTY     _IOW('o', 82, struct compat_dtv_properties)
2008 #define COMPAT_FE_GET_PROPERTY     _IOR('o', 83, struct compat_dtv_properties)
2009
2010 static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd,
2011                                             unsigned long arg)
2012 {
2013         struct dvb_device *dvbdev = file->private_data;
2014         struct dvb_frontend *fe = dvbdev->priv;
2015         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2016         int i, err = 0;
2017
2018         if (cmd == COMPAT_FE_SET_PROPERTY) {
2019                 struct compat_dtv_properties prop, *tvps = NULL;
2020                 struct compat_dtv_property *tvp = NULL;
2021
2022                 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2023                         return -EFAULT;
2024
2025                 tvps = &prop;
2026
2027                 /*
2028                  * Put an arbitrary limit on the number of messages that can
2029                  * be sent at once
2030                  */
2031                 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2032                         return -EINVAL;
2033
2034                 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2035                 if (IS_ERR(tvp))
2036                         return PTR_ERR(tvp);
2037
2038                 for (i = 0; i < tvps->num; i++) {
2039                         err = dtv_property_process_set(fe, file,
2040                                                         (tvp + i)->cmd,
2041                                                         (tvp + i)->u.data);
2042                         if (err < 0) {
2043                                 kfree(tvp);
2044                                 return err;
2045                         }
2046                 }
2047                 kfree(tvp);
2048         } else if (cmd == COMPAT_FE_GET_PROPERTY) {
2049                 struct compat_dtv_properties prop, *tvps = NULL;
2050                 struct compat_dtv_property *tvp = NULL;
2051                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2052
2053                 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2054                         return -EFAULT;
2055
2056                 tvps = &prop;
2057
2058                 /*
2059                  * Put an arbitrary limit on the number of messages that can
2060                  * be sent at once
2061                  */
2062                 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2063                         return -EINVAL;
2064
2065                 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2066                 if (IS_ERR(tvp))
2067                         return PTR_ERR(tvp);
2068
2069                 /*
2070                  * Let's use our own copy of property cache, in order to
2071                  * avoid mangling with DTV zigzag logic, as drivers might
2072                  * return crap, if they don't check if the data is available
2073                  * before updating the properties cache.
2074                  */
2075                 if (fepriv->state != FESTATE_IDLE) {
2076                         err = dtv_get_frontend(fe, &getp, NULL);
2077                         if (err < 0) {
2078                                 kfree(tvp);
2079                                 return err;
2080                         }
2081                 }
2082                 for (i = 0; i < tvps->num; i++) {
2083                         err = dtv_property_process_get(
2084                             fe, &getp, (struct dtv_property *)(tvp + i), file);
2085                         if (err < 0) {
2086                                 kfree(tvp);
2087                                 return err;
2088                         }
2089                 }
2090
2091                 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp,
2092                                  tvps->num * sizeof(struct compat_dtv_property))) {
2093                         kfree(tvp);
2094                         return -EFAULT;
2095                 }
2096                 kfree(tvp);
2097         }
2098
2099         return err;
2100 }
2101
2102 static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd,
2103                                       unsigned long arg)
2104 {
2105         struct dvb_device *dvbdev = file->private_data;
2106         struct dvb_frontend *fe = dvbdev->priv;
2107         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2108         int err;
2109
2110         if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) {
2111                 if (down_interruptible(&fepriv->sem))
2112                         return -ERESTARTSYS;
2113
2114                 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg);
2115
2116                 up(&fepriv->sem);
2117                 return err;
2118         }
2119
2120         return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2121 }
2122 #endif
2123
2124 static int dtv_set_frontend(struct dvb_frontend *fe)
2125 {
2126         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2127         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2128         struct dvb_frontend_tune_settings fetunesettings;
2129         u32 rolloff = 0;
2130
2131         if (dvb_frontend_check_parameters(fe) < 0)
2132                 return -EINVAL;
2133
2134         /*
2135          * Initialize output parameters to match the values given by
2136          * the user. FE_SET_FRONTEND triggers an initial frontend event
2137          * with status = 0, which copies output parameters to userspace.
2138          */
2139         dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2140
2141         /*
2142          * Be sure that the bandwidth will be filled for all
2143          * non-satellite systems, as tuners need to know what
2144          * low pass/Nyquist half filter should be applied, in
2145          * order to avoid inter-channel noise.
2146          *
2147          * ISDB-T and DVB-T/T2 already sets bandwidth.
2148          * ATSC and DVB-C don't set, so, the core should fill it.
2149          *
2150          * On DVB-C Annex A and C, the bandwidth is a function of
2151          * the roll-off and symbol rate. Annex B defines different
2152          * roll-off factors depending on the modulation. Fortunately,
2153          * Annex B is only used with 6MHz, so there's no need to
2154          * calculate it.
2155          *
2156          * While not officially supported, a side effect of handling it at
2157          * the cache level is that a program could retrieve the bandwidth
2158          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2159          */
2160         switch (c->delivery_system) {
2161         case SYS_ATSC:
2162         case SYS_DVBC_ANNEX_B:
2163                 c->bandwidth_hz = 6000000;
2164                 break;
2165         case SYS_DVBC_ANNEX_A:
2166                 rolloff = 115;
2167                 break;
2168         case SYS_DVBC_ANNEX_C:
2169                 rolloff = 113;
2170                 break;
2171         case SYS_DVBS:
2172         case SYS_TURBO:
2173         case SYS_ISDBS:
2174                 rolloff = 135;
2175                 break;
2176         case SYS_DVBS2:
2177                 switch (c->rolloff) {
2178                 case ROLLOFF_20:
2179                         rolloff = 120;
2180                         break;
2181                 case ROLLOFF_25:
2182                         rolloff = 125;
2183                         break;
2184                 default:
2185                 case ROLLOFF_35:
2186                         rolloff = 135;
2187                 }
2188                 break;
2189         default:
2190                 break;
2191         }
2192         if (rolloff)
2193                 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2194
2195         /* force auto frequency inversion if requested */
2196         if (dvb_force_auto_inversion)
2197                 c->inversion = INVERSION_AUTO;
2198
2199         /*
2200          * without hierarchical coding code_rate_LP is irrelevant,
2201          * so we tolerate the otherwise invalid FEC_NONE setting
2202          */
2203         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2204                 c->code_rate_LP = FEC_AUTO;
2205
2206         /* get frontend-specific tuning settings */
2207         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2208         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2209                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2210                 fepriv->max_drift = fetunesettings.max_drift;
2211                 fepriv->step_size = fetunesettings.step_size;
2212         } else {
2213                 /* default values */
2214                 switch (c->delivery_system) {
2215                 case SYS_DVBS:
2216                 case SYS_DVBS2:
2217                 case SYS_ISDBS:
2218                 case SYS_TURBO:
2219                 case SYS_DVBC_ANNEX_A:
2220                 case SYS_DVBC_ANNEX_C:
2221                         fepriv->min_delay = HZ / 20;
2222                         fepriv->step_size = c->symbol_rate / 16000;
2223                         fepriv->max_drift = c->symbol_rate / 2000;
2224                         break;
2225                 case SYS_DVBT:
2226                 case SYS_DVBT2:
2227                 case SYS_ISDBT:
2228                 case SYS_DTMB:
2229                         fepriv->min_delay = HZ / 20;
2230                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2231                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2232                         break;
2233                 default:
2234                         /*
2235                          * FIXME: This sounds wrong! if freqency_stepsize is
2236                          * defined by the frontend, why not use it???
2237                          */
2238                         fepriv->min_delay = HZ / 20;
2239                         fepriv->step_size = 0; /* no zigzag */
2240                         fepriv->max_drift = 0;
2241                         break;
2242                 }
2243         }
2244         if (dvb_override_tune_delay > 0)
2245                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2246
2247         fepriv->state = FESTATE_RETUNE;
2248
2249         /* Request the search algorithm to search */
2250         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2251
2252         dvb_frontend_clear_events(fe);
2253         dvb_frontend_add_event(fe, 0);
2254         dvb_frontend_wakeup(fe);
2255         fepriv->status = 0;
2256
2257         return 0;
2258 }
2259
2260
2261 static int dvb_frontend_handle_ioctl(struct file *file,
2262                                      unsigned int cmd, void *parg)
2263 {
2264         struct dvb_device *dvbdev = file->private_data;
2265         struct dvb_frontend *fe = dvbdev->priv;
2266         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2267         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2268         int i, err = -ENOTSUPP;
2269
2270         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2271
2272         switch(cmd) {
2273         case FE_SET_PROPERTY: {
2274                 struct dtv_properties *tvps = parg;
2275                 struct dtv_property *tvp = NULL;
2276
2277                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2278                         __func__, tvps->num);
2279                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2280                         __func__, tvps->props);
2281
2282                 /*
2283                  * Put an arbitrary limit on the number of messages that can
2284                  * be sent at once
2285                  */
2286                 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2287                         return -EINVAL;
2288
2289                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2290                 if (IS_ERR(tvp))
2291                         return PTR_ERR(tvp);
2292
2293                 for (i = 0; i < tvps->num; i++) {
2294                         err = dtv_property_process_set(fe, file,
2295                                                         (tvp + i)->cmd,
2296                                                         (tvp + i)->u.data);
2297                         if (err < 0) {
2298                                 kfree(tvp);
2299                                 return err;
2300                         }
2301                 }
2302                 kfree(tvp);
2303                 err = 0;
2304                 break;
2305         }
2306         case FE_GET_PROPERTY: {
2307                 struct dtv_properties *tvps = parg;
2308                 struct dtv_property *tvp = NULL;
2309                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2310
2311                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2312                         __func__, tvps->num);
2313                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2314                         __func__, tvps->props);
2315
2316                 /*
2317                  * Put an arbitrary limit on the number of messages that can
2318                  * be sent at once
2319                  */
2320                 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2321                         return -EINVAL;
2322
2323                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2324                 if (IS_ERR(tvp))
2325                         return PTR_ERR(tvp);
2326
2327                 /*
2328                  * Let's use our own copy of property cache, in order to
2329                  * avoid mangling with DTV zigzag logic, as drivers might
2330                  * return crap, if they don't check if the data is available
2331                  * before updating the properties cache.
2332                  */
2333                 if (fepriv->state != FESTATE_IDLE) {
2334                         err = dtv_get_frontend(fe, &getp, NULL);
2335                         if (err < 0) {
2336                                 kfree(tvp);
2337                                 return err;
2338                         }
2339                 }
2340                 for (i = 0; i < tvps->num; i++) {
2341                         err = dtv_property_process_get(fe, &getp, tvp + i, file);
2342                         if (err < 0) {
2343                                 kfree(tvp);
2344                                 return err;
2345                         }
2346                 }
2347
2348                 if (copy_to_user((void __user *)tvps->props, tvp,
2349                                  tvps->num * sizeof(struct dtv_property))) {
2350                         kfree(tvp);
2351                         return -EFAULT;
2352                 }
2353                 kfree(tvp);
2354                 err = 0;
2355                 break;
2356         }
2357
2358         case FE_GET_INFO: {
2359                 struct dvb_frontend_info* info = parg;
2360
2361                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2362                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2363
2364                 /*
2365                  * Associate the 4 delivery systems supported by DVBv3
2366                  * API with their DVBv5 counterpart. For the other standards,
2367                  * use the closest type, assuming that it would hopefully
2368                  * work with a DVBv3 application.
2369                  * It should be noticed that, on multi-frontend devices with
2370                  * different types (terrestrial and cable, for example),
2371                  * a pure DVBv3 application won't be able to use all delivery
2372                  * systems. Yet, changing the DVBv5 cache to the other delivery
2373                  * system should be enough for making it work.
2374                  */
2375                 switch (dvbv3_type(c->delivery_system)) {
2376                 case DVBV3_QPSK:
2377                         info->type = FE_QPSK;
2378                         break;
2379                 case DVBV3_ATSC:
2380                         info->type = FE_ATSC;
2381                         break;
2382                 case DVBV3_QAM:
2383                         info->type = FE_QAM;
2384                         break;
2385                 case DVBV3_OFDM:
2386                         info->type = FE_OFDM;
2387                         break;
2388                 default:
2389                         dev_err(fe->dvb->device,
2390                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2391                                         __func__, c->delivery_system);
2392                         fe->ops.info.type = FE_OFDM;
2393                 }
2394                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2395                                  __func__, c->delivery_system, fe->ops.info.type);
2396
2397                 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2398                 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2399                         info->caps |= FE_CAN_INVERSION_AUTO;
2400                 err = 0;
2401                 break;
2402         }
2403
2404         case FE_READ_STATUS: {
2405                 enum fe_status *status = parg;
2406
2407                 /* if retune was requested but hasn't occurred yet, prevent
2408                  * that user get signal state from previous tuning */
2409                 if (fepriv->state == FESTATE_RETUNE ||
2410                     fepriv->state == FESTATE_ERROR) {
2411                         err=0;
2412                         *status = 0;
2413                         break;
2414                 }
2415
2416                 if (fe->ops.read_status)
2417                         err = fe->ops.read_status(fe, status);
2418                 break;
2419         }
2420
2421         case FE_DISEQC_RESET_OVERLOAD:
2422                 if (fe->ops.diseqc_reset_overload) {
2423                         err = fe->ops.diseqc_reset_overload(fe);
2424                         fepriv->state = FESTATE_DISEQC;
2425                         fepriv->status = 0;
2426                 }
2427                 break;
2428
2429         case FE_DISEQC_SEND_MASTER_CMD:
2430                 if (fe->ops.diseqc_send_master_cmd) {
2431                         struct dvb_diseqc_master_cmd *cmd = parg;
2432
2433                         if (cmd->msg_len > sizeof(cmd->msg)) {
2434                                 err = -EINVAL;
2435                                 break;
2436                         }
2437                         err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2438                         fepriv->state = FESTATE_DISEQC;
2439                         fepriv->status = 0;
2440                 }
2441                 break;
2442
2443         case FE_DISEQC_SEND_BURST:
2444                 if (fe->ops.diseqc_send_burst) {
2445                         err = fe->ops.diseqc_send_burst(fe,
2446                                                 (enum fe_sec_mini_cmd)parg);
2447                         fepriv->state = FESTATE_DISEQC;
2448                         fepriv->status = 0;
2449                 }
2450                 break;
2451
2452         case FE_SET_TONE:
2453                 if (fe->ops.set_tone) {
2454                         err = fe->ops.set_tone(fe,
2455                                                (enum fe_sec_tone_mode)parg);
2456                         fepriv->tone = (enum fe_sec_tone_mode)parg;
2457                         fepriv->state = FESTATE_DISEQC;
2458                         fepriv->status = 0;
2459                 }
2460                 break;
2461
2462         case FE_SET_VOLTAGE:
2463                 if (fe->ops.set_voltage) {
2464                         err = fe->ops.set_voltage(fe,
2465                                                   (enum fe_sec_voltage)parg);
2466                         fepriv->voltage = (enum fe_sec_voltage)parg;
2467                         fepriv->state = FESTATE_DISEQC;
2468                         fepriv->status = 0;
2469                 }
2470                 break;
2471
2472         case FE_DISEQC_RECV_SLAVE_REPLY:
2473                 if (fe->ops.diseqc_recv_slave_reply)
2474                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2475                 break;
2476
2477         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2478                 if (fe->ops.enable_high_lnb_voltage)
2479                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2480                 break;
2481
2482         case FE_SET_FRONTEND_TUNE_MODE:
2483                 fepriv->tune_mode_flags = (unsigned long) parg;
2484                 err = 0;
2485                 break;
2486
2487         /* DEPRECATED dish control ioctls */
2488
2489         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2490                 if (fe->ops.dishnetwork_send_legacy_command) {
2491                         err = fe->ops.dishnetwork_send_legacy_command(fe,
2492                                                          (unsigned long)parg);
2493                         fepriv->state = FESTATE_DISEQC;
2494                         fepriv->status = 0;
2495                 } else if (fe->ops.set_voltage) {
2496                         /*
2497                          * NOTE: This is a fallback condition.  Some frontends
2498                          * (stv0299 for instance) take longer than 8msec to
2499                          * respond to a set_voltage command.  Those switches
2500                          * need custom routines to switch properly.  For all
2501                          * other frontends, the following should work ok.
2502                          * Dish network legacy switches (as used by Dish500)
2503                          * are controlled by sending 9-bit command words
2504                          * spaced 8msec apart.
2505                          * the actual command word is switch/port dependent
2506                          * so it is up to the userspace application to send
2507                          * the right command.
2508                          * The command must always start with a '0' after
2509                          * initialization, so parg is 8 bits and does not
2510                          * include the initialization or start bit
2511                          */
2512                         unsigned long swcmd = ((unsigned long) parg) << 1;
2513                         ktime_t nexttime;
2514                         ktime_t tv[10];
2515                         int i;
2516                         u8 last = 1;
2517                         if (dvb_frontend_debug)
2518                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2519                         nexttime = ktime_get_boottime();
2520                         if (dvb_frontend_debug)
2521                                 tv[0] = nexttime;
2522                         /* before sending a command, initialize by sending
2523                          * a 32ms 18V to the switch
2524                          */
2525                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2526                         dvb_frontend_sleep_until(&nexttime, 32000);
2527
2528                         for (i = 0; i < 9; i++) {
2529                                 if (dvb_frontend_debug)
2530                                         tv[i+1] = ktime_get_boottime();
2531                                 if ((swcmd & 0x01) != last) {
2532                                         /* set voltage to (last ? 13V : 18V) */
2533                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2534                                         last = (last) ? 0 : 1;
2535                                 }
2536                                 swcmd = swcmd >> 1;
2537                                 if (i != 8)
2538                                         dvb_frontend_sleep_until(&nexttime, 8000);
2539                         }
2540                         if (dvb_frontend_debug) {
2541                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2542                                         __func__, fe->dvb->num);
2543                                 for (i = 1; i < 10; i++)
2544                                         printk("%d: %d\n", i,
2545                                         (int) ktime_us_delta(tv[i], tv[i-1]));
2546                         }
2547                         err = 0;
2548                         fepriv->state = FESTATE_DISEQC;
2549                         fepriv->status = 0;
2550                 }
2551                 break;
2552
2553         /* DEPRECATED statistics ioctls */
2554
2555         case FE_READ_BER:
2556                 if (fe->ops.read_ber) {
2557                         if (fepriv->thread)
2558                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2559                         else
2560                                 err = -EAGAIN;
2561                 }
2562                 break;
2563
2564         case FE_READ_SIGNAL_STRENGTH:
2565                 if (fe->ops.read_signal_strength) {
2566                         if (fepriv->thread)
2567                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2568                         else
2569                                 err = -EAGAIN;
2570                 }
2571                 break;
2572
2573         case FE_READ_SNR:
2574                 if (fe->ops.read_snr) {
2575                         if (fepriv->thread)
2576                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2577                         else
2578                                 err = -EAGAIN;
2579                 }
2580                 break;
2581
2582         case FE_READ_UNCORRECTED_BLOCKS:
2583                 if (fe->ops.read_ucblocks) {
2584                         if (fepriv->thread)
2585                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2586                         else
2587                                 err = -EAGAIN;
2588                 }
2589                 break;
2590
2591         /* DEPRECATED DVBv3 ioctls */
2592
2593         case FE_SET_FRONTEND:
2594                 err = dvbv3_set_delivery_system(fe);
2595                 if (err)
2596                         break;
2597
2598                 err = dtv_property_cache_sync(fe, c, parg);
2599                 if (err)
2600                         break;
2601                 err = dtv_set_frontend(fe);
2602                 break;
2603         case FE_GET_EVENT:
2604                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2605                 break;
2606
2607         case FE_GET_FRONTEND: {
2608                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2609
2610                 /*
2611                  * Let's use our own copy of property cache, in order to
2612                  * avoid mangling with DTV zigzag logic, as drivers might
2613                  * return crap, if they don't check if the data is available
2614                  * before updating the properties cache.
2615                  */
2616                 err = dtv_get_frontend(fe, &getp, parg);
2617                 break;
2618         }
2619
2620         default:
2621                 return -ENOTSUPP;
2622         } /* switch */
2623
2624         return err;
2625 }
2626
2627
2628 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2629 {
2630         struct dvb_device *dvbdev = file->private_data;
2631         struct dvb_frontend *fe = dvbdev->priv;
2632         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2633
2634         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2635
2636         poll_wait (file, &fepriv->events.wait_queue, wait);
2637
2638         if (fepriv->events.eventw != fepriv->events.eventr)
2639                 return (POLLIN | POLLRDNORM | POLLPRI);
2640
2641         return 0;
2642 }
2643
2644 static int dvb_frontend_open(struct inode *inode, struct file *file)
2645 {
2646         struct dvb_device *dvbdev = file->private_data;
2647         struct dvb_frontend *fe = dvbdev->priv;
2648         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2649         struct dvb_adapter *adapter = fe->dvb;
2650         int ret;
2651
2652         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2653         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2654                 return -ENODEV;
2655
2656         if (adapter->mfe_shared) {
2657                 mutex_lock (&adapter->mfe_lock);
2658
2659                 if (adapter->mfe_dvbdev == NULL)
2660                         adapter->mfe_dvbdev = dvbdev;
2661
2662                 else if (adapter->mfe_dvbdev != dvbdev) {
2663                         struct dvb_device
2664                                 *mfedev = adapter->mfe_dvbdev;
2665                         struct dvb_frontend
2666                                 *mfe = mfedev->priv;
2667                         struct dvb_frontend_private
2668                                 *mfepriv = mfe->frontend_priv;
2669                         int mferetry = (dvb_mfe_wait_time << 1);
2670
2671                         mutex_unlock (&adapter->mfe_lock);
2672                         while (mferetry-- && (mfedev->users != -1 ||
2673                                         mfepriv->thread != NULL)) {
2674                                 if(msleep_interruptible(500)) {
2675                                         if(signal_pending(current))
2676                                                 return -EINTR;
2677                                 }
2678                         }
2679
2680                         mutex_lock (&adapter->mfe_lock);
2681                         if(adapter->mfe_dvbdev != dvbdev) {
2682                                 mfedev = adapter->mfe_dvbdev;
2683                                 mfe = mfedev->priv;
2684                                 mfepriv = mfe->frontend_priv;
2685                                 if (mfedev->users != -1 ||
2686                                                 mfepriv->thread != NULL) {
2687                                         mutex_unlock (&adapter->mfe_lock);
2688                                         return -EBUSY;
2689                                 }
2690                                 adapter->mfe_dvbdev = dvbdev;
2691                         }
2692                 }
2693         }
2694
2695         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2696                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2697                         goto err0;
2698
2699                 /* If we took control of the bus, we need to force
2700                    reinitialization.  This is because many ts_bus_ctrl()
2701                    functions strobe the RESET pin on the demod, and if the
2702                    frontend thread already exists then the dvb_init() routine
2703                    won't get called (which is what usually does initial
2704                    register configuration). */
2705                 fepriv->reinitialise = 1;
2706         }
2707
2708         if ((ret = dvb_generic_open (inode, file)) < 0)
2709                 goto err1;
2710
2711         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2712                 /* normal tune mode when opened R/W */
2713                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2714                 fepriv->tone = -1;
2715                 fepriv->voltage = -1;
2716
2717 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2718                 if (fe->dvb->mdev && fe->dvb->mdev->enable_source) {
2719                         ret = fe->dvb->mdev->enable_source(dvbdev->entity,
2720                                                            &fepriv->pipe);
2721                         if (ret) {
2722                                 dev_err(fe->dvb->device,
2723                                         "Tuner is busy. Error %d\n", ret);
2724                                 goto err2;
2725                         }
2726                 }
2727 #endif
2728                 ret = dvb_frontend_start (fe);
2729                 if (ret)
2730                         goto err3;
2731
2732                 /*  empty event queue */
2733                 fepriv->events.eventr = fepriv->events.eventw = 0;
2734         }
2735
2736         dvb_frontend_private_get(fepriv);
2737
2738         if (adapter->mfe_shared)
2739                 mutex_unlock (&adapter->mfe_lock);
2740         return ret;
2741
2742 err3:
2743 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2744         if (fe->dvb->mdev && fe->dvb->mdev->disable_source)
2745                 fe->dvb->mdev->disable_source(dvbdev->entity);
2746 err2:
2747 #endif
2748         dvb_generic_release(inode, file);
2749 err1:
2750         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2751                 fe->ops.ts_bus_ctrl(fe, 0);
2752 err0:
2753         if (adapter->mfe_shared)
2754                 mutex_unlock (&adapter->mfe_lock);
2755         return ret;
2756 }
2757
2758 static int dvb_frontend_release(struct inode *inode, struct file *file)
2759 {
2760         struct dvb_device *dvbdev = file->private_data;
2761         struct dvb_frontend *fe = dvbdev->priv;
2762         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2763         int ret;
2764
2765         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2766
2767         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2768                 fepriv->release_jiffies = jiffies;
2769                 mb();
2770         }
2771
2772         ret = dvb_generic_release (inode, file);
2773
2774         if (dvbdev->users == -1) {
2775                 wake_up(&fepriv->wait_queue);
2776 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2777                 if (fe->dvb->mdev && fe->dvb->mdev->disable_source)
2778                         fe->dvb->mdev->disable_source(dvbdev->entity);
2779 #endif
2780                 if (fe->exit != DVB_FE_NO_EXIT)
2781                         wake_up(&dvbdev->wait_queue);
2782                 if (fe->ops.ts_bus_ctrl)
2783                         fe->ops.ts_bus_ctrl(fe, 0);
2784         }
2785
2786         dvb_frontend_private_put(fepriv);
2787
2788         return ret;
2789 }
2790
2791 static const struct file_operations dvb_frontend_fops = {
2792         .owner          = THIS_MODULE,
2793         .unlocked_ioctl = dvb_frontend_ioctl,
2794 #ifdef CONFIG_COMPAT
2795         .compat_ioctl   = dvb_frontend_compat_ioctl,
2796 #endif
2797         .poll           = dvb_frontend_poll,
2798         .open           = dvb_frontend_open,
2799         .release        = dvb_frontend_release,
2800         .llseek         = noop_llseek,
2801 };
2802
2803 int dvb_frontend_suspend(struct dvb_frontend *fe)
2804 {
2805         int ret = 0;
2806
2807         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2808                         fe->id);
2809
2810         if (fe->ops.tuner_ops.suspend)
2811                 ret = fe->ops.tuner_ops.suspend(fe);
2812         else if (fe->ops.tuner_ops.sleep)
2813                 ret = fe->ops.tuner_ops.sleep(fe);
2814
2815         if (fe->ops.sleep)
2816                 ret = fe->ops.sleep(fe);
2817
2818         return ret;
2819 }
2820 EXPORT_SYMBOL(dvb_frontend_suspend);
2821
2822 int dvb_frontend_resume(struct dvb_frontend *fe)
2823 {
2824         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2825         int ret = 0;
2826
2827         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2828                         fe->id);
2829
2830         fe->exit = DVB_FE_DEVICE_RESUME;
2831         if (fe->ops.init)
2832                 ret = fe->ops.init(fe);
2833
2834         if (fe->ops.tuner_ops.resume)
2835                 ret = fe->ops.tuner_ops.resume(fe);
2836         else if (fe->ops.tuner_ops.init)
2837                 ret = fe->ops.tuner_ops.init(fe);
2838
2839         if (fe->ops.set_tone && fepriv->tone != -1)
2840                 fe->ops.set_tone(fe, fepriv->tone);
2841         if (fe->ops.set_voltage && fepriv->voltage != -1)
2842                 fe->ops.set_voltage(fe, fepriv->voltage);
2843
2844         fe->exit = DVB_FE_NO_EXIT;
2845         fepriv->state = FESTATE_RETUNE;
2846         dvb_frontend_wakeup(fe);
2847
2848         return ret;
2849 }
2850 EXPORT_SYMBOL(dvb_frontend_resume);
2851
2852 int dvb_register_frontend(struct dvb_adapter* dvb,
2853                           struct dvb_frontend* fe)
2854 {
2855         struct dvb_frontend_private *fepriv;
2856         const struct dvb_device dvbdev_template = {
2857                 .users = ~0,
2858                 .writers = 1,
2859                 .readers = (~0)-1,
2860                 .fops = &dvb_frontend_fops,
2861 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2862                 .name = fe->ops.info.name,
2863 #endif
2864         };
2865
2866         dev_dbg(dvb->device, "%s:\n", __func__);
2867
2868         if (mutex_lock_interruptible(&frontend_mutex))
2869                 return -ERESTARTSYS;
2870
2871         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2872         if (fe->frontend_priv == NULL) {
2873                 mutex_unlock(&frontend_mutex);
2874                 return -ENOMEM;
2875         }
2876         fepriv = fe->frontend_priv;
2877
2878         kref_init(&fepriv->refcount);
2879
2880         sema_init(&fepriv->sem, 1);
2881         init_waitqueue_head (&fepriv->wait_queue);
2882         init_waitqueue_head (&fepriv->events.wait_queue);
2883         mutex_init(&fepriv->events.mtx);
2884         fe->dvb = dvb;
2885         fepriv->inversion = INVERSION_OFF;
2886
2887         dev_info(fe->dvb->device,
2888                         "DVB: registering adapter %i frontend %i (%s)...\n",
2889                         fe->dvb->num, fe->id, fe->ops.info.name);
2890
2891         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2892                              fe, DVB_DEVICE_FRONTEND, 0);
2893
2894         /*
2895          * Initialize the cache to the proper values according with the
2896          * first supported delivery system (ops->delsys[0])
2897          */
2898
2899         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2900         dvb_frontend_clear_cache(fe);
2901
2902         mutex_unlock(&frontend_mutex);
2903         return 0;
2904 }
2905 EXPORT_SYMBOL(dvb_register_frontend);
2906
2907 int dvb_unregister_frontend(struct dvb_frontend* fe)
2908 {
2909         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2910         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2911
2912         mutex_lock(&frontend_mutex);
2913         dvb_frontend_stop (fe);
2914         dvb_unregister_device (fepriv->dvbdev);
2915
2916         /* fe is invalid now */
2917         mutex_unlock(&frontend_mutex);
2918         dvb_frontend_private_put(fepriv);
2919         return 0;
2920 }
2921 EXPORT_SYMBOL(dvb_unregister_frontend);
2922
2923 #ifdef CONFIG_MEDIA_ATTACH
2924 void dvb_frontend_detach(struct dvb_frontend* fe)
2925 {
2926         void *ptr;
2927
2928         if (fe->ops.release_sec) {
2929                 fe->ops.release_sec(fe);
2930                 dvb_detach(fe->ops.release_sec);
2931         }
2932         if (fe->ops.tuner_ops.release) {
2933                 fe->ops.tuner_ops.release(fe);
2934                 dvb_detach(fe->ops.tuner_ops.release);
2935         }
2936         if (fe->ops.analog_ops.release) {
2937                 fe->ops.analog_ops.release(fe);
2938                 dvb_detach(fe->ops.analog_ops.release);
2939         }
2940         ptr = (void*)fe->ops.release;
2941         if (ptr) {
2942                 fe->ops.release(fe);
2943                 dvb_detach(ptr);
2944         }
2945 }
2946 #else
2947 void dvb_frontend_detach(struct dvb_frontend* fe)
2948 {
2949         if (fe->ops.release_sec)
2950                 fe->ops.release_sec(fe);
2951         if (fe->ops.tuner_ops.release)
2952                 fe->ops.tuner_ops.release(fe);
2953         if (fe->ops.analog_ops.release)
2954                 fe->ops.analog_ops.release(fe);
2955         if (fe->ops.release)
2956                 fe->ops.release(fe);
2957 }
2958 #endif
2959 EXPORT_SYMBOL(dvb_frontend_detach);