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

   1 /*
   2  * dvb_frontend.c: DVB frontend tuning interface/thread
   3  *
   4  *
   5  * Copyright (C) 1999-2001 Ralph  Metzler
   6  *                         Marcus Metzler
   7  *                         Holger Waechtler
   8  *                                    for convergence integrated media GmbH
   9  *
  10  * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26  */
  27
  28 /* Enables DVBv3 compatibility bits at the headers */
  29 #define __DVB_CORE__
  30
  31 #include <linux/string.h>
  32 #include <linux/kernel.h>
  33 #include <linux/sched.h>
  34 #include <linux/wait.h>
  35 #include <linux/slab.h>
  36 #include <linux/poll.h>
  37 #include <linux/semaphore.h>
  38 #include <linux/module.h>
  39 #include <linux/list.h>
  40 #include <linux/freezer.h>
  41 #include <linux/jiffies.h>
  42 #include <linux/kthread.h>
  43 #include <asm/processor.h>
  44
  45 #include "dvb_frontend.h"
  46 #include "dvbdev.h"
  47 #include <linux/dvb/version.h>
  48
  49 static int dvb_frontend_debug;
  50 static int dvb_shutdown_timeout;
  51 static int dvb_force_auto_inversion;
  52 static int dvb_override_tune_delay;
  53 static int dvb_powerdown_on_sleep = 1;
  54 static int dvb_mfe_wait_time = 5;
  55
  56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  58 module_param(dvb_shutdown_timeout, int, 0644);
  59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  60 module_param(dvb_force_auto_inversion, int, 0644);
  61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  62 module_param(dvb_override_tune_delay, int, 0644);
  63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  64 module_param(dvb_powerdown_on_sleep, int, 0644);
  65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  66 module_param(dvb_mfe_wait_time, int, 0644);
  67 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
  68
  69 #define dprintk if (dvb_frontend_debug) printk
  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 #define FE_ALGO_HW              1
  86 /*
  87  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  88  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  89  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  90  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  91  * FESTATE_TUNED. The frontend has successfully locked on.
  92  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  93  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  94  * FESTATE_DISEQC. A DISEQC command has just been issued.
  95  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  96  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  97  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  98  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  99  */
 100
 101 #define DVB_FE_NO_EXIT  0
 102 #define DVB_FE_NORMAL_EXIT      1
 103 #define DVB_FE_DEVICE_REMOVED   2
 104
 105 static DEFINE_MUTEX(frontend_mutex);
 106
 107 struct dvb_frontend_private {
 108
 109         /* thread/frontend values */
 110         struct dvb_device *dvbdev;
 111         struct dvb_frontend_parameters parameters_in;
 112         struct dvb_frontend_parameters parameters_out;
 113         struct dvb_fe_events events;
 114         struct semaphore sem;
 115         struct list_head list_head;
 116         wait_queue_head_t wait_queue;
 117         struct task_struct *thread;
 118         unsigned long release_jiffies;
 119         unsigned int exit;
 120         unsigned int wakeup;
 121         fe_status_t status;
 122         unsigned long tune_mode_flags;
 123         unsigned int delay;
 124         unsigned int reinitialise;
 125         int tone;
 126         int voltage;
 127
 128         /* swzigzag values */
 129         unsigned int state;
 130         unsigned int bending;
 131         int lnb_drift;
 132         unsigned int inversion;
 133         unsigned int auto_step;
 134         unsigned int auto_sub_step;
 135         unsigned int started_auto_step;
 136         unsigned int min_delay;
 137         unsigned int max_drift;
 138         unsigned int step_size;
 139         int quality;
 140         unsigned int check_wrapped;
 141         enum dvbfe_search algo_status;
 142 };
 143
 144 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 145 static int dtv_get_frontend(struct dvb_frontend *fe,
 146                             struct dvb_frontend_parameters *p_out);
 147
 148 static bool has_get_frontend(struct dvb_frontend *fe)
 149 {
 150         return fe->ops.get_frontend;
 151 }
 152
 153 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 154 {
 155         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 156         struct dvb_fe_events *events = &fepriv->events;
 157         struct dvb_frontend_event *e;
 158         int wp;
 159
 160         dprintk ("%s\n", __func__);
 161
 162         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 163                 dtv_get_frontend(fe, &fepriv->parameters_out);
 164
 165         mutex_lock(&events->mtx);
 166
 167         wp = (events->eventw + 1) % MAX_EVENT;
 168         if (wp == events->eventr) {
 169                 events->overflow = 1;
 170                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 171         }
 172
 173         e = &events->events[events->eventw];
 174         e->status = status;
 175         e->parameters = fepriv->parameters_out;
 176
 177         events->eventw = wp;
 178
 179         mutex_unlock(&events->mtx);
 180
 181         wake_up_interruptible (&events->wait_queue);
 182 }
 183
 184 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 185                             struct dvb_frontend_event *event, int flags)
 186 {
 187         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 188         struct dvb_fe_events *events = &fepriv->events;
 189
 190         dprintk ("%s\n", __func__);
 191
 192         if (events->overflow) {
 193                 events->overflow = 0;
 194                 return -EOVERFLOW;
 195         }
 196
 197         if (events->eventw == events->eventr) {
 198                 int ret;
 199
 200                 if (flags & O_NONBLOCK)
 201                         return -EWOULDBLOCK;
 202
 203                 up(&fepriv->sem);
 204
 205                 ret = wait_event_interruptible (events->wait_queue,
 206                                                 events->eventw != events->eventr);
 207
 208                 if (down_interruptible (&fepriv->sem))
 209                         return -ERESTARTSYS;
 210
 211                 if (ret < 0)
 212                         return ret;
 213         }
 214
 215         mutex_lock(&events->mtx);
 216         *event = events->events[events->eventr];
 217         events->eventr = (events->eventr + 1) % MAX_EVENT;
 218         mutex_unlock(&events->mtx);
 219
 220         return 0;
 221 }
 222
 223 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 224 {
 225         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 226         struct dvb_fe_events *events = &fepriv->events;
 227
 228         mutex_lock(&events->mtx);
 229         events->eventr = events->eventw;
 230         mutex_unlock(&events->mtx);
 231 }
 232
 233 static void dvb_frontend_init(struct dvb_frontend *fe)
 234 {
 235         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 236                  fe->dvb->num,
 237                  fe->id,
 238                  fe->ops.info.name);
 239
 240         if (fe->ops.init)
 241                 fe->ops.init(fe);
 242         if (fe->ops.tuner_ops.init) {
 243                 if (fe->ops.i2c_gate_ctrl)
 244                         fe->ops.i2c_gate_ctrl(fe, 1);
 245                 fe->ops.tuner_ops.init(fe);
 246                 if (fe->ops.i2c_gate_ctrl)
 247                         fe->ops.i2c_gate_ctrl(fe, 0);
 248         }
 249 }
 250
 251 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 252 {
 253         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 254
 255         fepriv->reinitialise = 1;
 256         dvb_frontend_wakeup(fe);
 257 }
 258 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 259
 260 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 261 {
 262         int q2;
 263
 264         dprintk ("%s\n", __func__);
 265
 266         if (locked)
 267                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 268         else
 269                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 270
 271         q2 = fepriv->quality - 128;
 272         q2 *= q2;
 273
 274         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 275 }
 276
 277 /**
 278  * Performs automatic twiddling of frontend parameters.
 279  *
 280  * @param fe The frontend concerned.
 281  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 282  * @returns Number of complete iterations that have been performed.
 283  */
 284 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 285 {
 286         int autoinversion;
 287         int ready = 0;
 288         int fe_set_err = 0;
 289         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 290         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 291         int original_inversion = c->inversion;
 292         u32 original_frequency = c->frequency;
 293
 294         /* are we using autoinversion? */
 295         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 296                          (c->inversion == INVERSION_AUTO));
 297
 298         /* setup parameters correctly */
 299         while(!ready) {
 300                 /* calculate the lnb_drift */
 301                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 302
 303                 /* wrap the auto_step if we've exceeded the maximum drift */
 304                 if (fepriv->lnb_drift > fepriv->max_drift) {
 305                         fepriv->auto_step = 0;
 306                         fepriv->auto_sub_step = 0;
 307                         fepriv->lnb_drift = 0;
 308                 }
 309
 310                 /* perform inversion and +/- zigzag */
 311                 switch(fepriv->auto_sub_step) {
 312                 case 0:
 313                         /* try with the current inversion and current drift setting */
 314                         ready = 1;
 315                         break;
 316
 317                 case 1:
 318                         if (!autoinversion) break;
 319
 320                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 321                         ready = 1;
 322                         break;
 323
 324                 case 2:
 325                         if (fepriv->lnb_drift == 0) break;
 326
 327                         fepriv->lnb_drift = -fepriv->lnb_drift;
 328                         ready = 1;
 329                         break;
 330
 331                 case 3:
 332                         if (fepriv->lnb_drift == 0) break;
 333                         if (!autoinversion) break;
 334
 335                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 336                         fepriv->lnb_drift = -fepriv->lnb_drift;
 337                         ready = 1;
 338                         break;
 339
 340                 default:
 341                         fepriv->auto_step++;
 342                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 343                         break;
 344                 }
 345
 346                 if (!ready) fepriv->auto_sub_step++;
 347         }
 348
 349         /* if this attempt would hit where we started, indicate a complete
 350          * iteration has occurred */
 351         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 352             (fepriv->auto_sub_step == 0) && check_wrapped) {
 353                 return 1;
 354         }
 355
 356         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 357                 "auto_sub_step:%i started_auto_step:%i\n",
 358                 __func__, fepriv->lnb_drift, fepriv->inversion,
 359                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 360
 361         /* set the frontend itself */
 362         c->frequency += fepriv->lnb_drift;
 363         if (autoinversion)
 364                 c->inversion = fepriv->inversion;
 365         tmp = *c;
 366         if (fe->ops.set_frontend)
 367                 fe_set_err = fe->ops.set_frontend(fe);
 368         *c = tmp;
 369         if (fe_set_err < 0) {
 370                 fepriv->state = FESTATE_ERROR;
 371                 return fe_set_err;
 372         }
 373
 374         c->frequency = original_frequency;
 375         c->inversion = original_inversion;
 376
 377         fepriv->auto_sub_step++;
 378         return 0;
 379 }
 380
 381 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 382 {
 383         fe_status_t s = 0;
 384         int retval = 0;
 385         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 386         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 387
 388         /* if we've got no parameters, just keep idling */
 389         if (fepriv->state & FESTATE_IDLE) {
 390                 fepriv->delay = 3*HZ;
 391                 fepriv->quality = 0;
 392                 return;
 393         }
 394
 395         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 396         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 397                 if (fepriv->state & FESTATE_RETUNE) {
 398                         tmp = *c;
 399                         if (fe->ops.set_frontend)
 400                                 retval = fe->ops.set_frontend(fe);
 401                         *c = tmp;
 402                         if (retval < 0)
 403                                 fepriv->state = FESTATE_ERROR;
 404                         else
 405                                 fepriv->state = FESTATE_TUNED;
 406                 }
 407                 fepriv->delay = 3*HZ;
 408                 fepriv->quality = 0;
 409                 return;
 410         }
 411
 412         /* get the frontend status */
 413         if (fepriv->state & FESTATE_RETUNE) {
 414                 s = 0;
 415         } else {
 416                 if (fe->ops.read_status)
 417                         fe->ops.read_status(fe, &s);
 418                 if (s != fepriv->status) {
 419                         dvb_frontend_add_event(fe, s);
 420                         fepriv->status = s;
 421                 }
 422         }
 423
 424         /* if we're not tuned, and we have a lock, move to the TUNED state */
 425         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 426                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 427                 fepriv->state = FESTATE_TUNED;
 428
 429                 /* if we're tuned, then we have determined the correct inversion */
 430                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 431                     (c->inversion == INVERSION_AUTO)) {
 432                         c->inversion = fepriv->inversion;
 433                 }
 434                 return;
 435         }
 436
 437         /* if we are tuned already, check we're still locked */
 438         if (fepriv->state & FESTATE_TUNED) {
 439                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 440
 441                 /* we're tuned, and the lock is still good... */
 442                 if (s & FE_HAS_LOCK) {
 443                         return;
 444                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 445                         fepriv->state = FESTATE_ZIGZAG_FAST;
 446                         fepriv->started_auto_step = fepriv->auto_step;
 447                         fepriv->check_wrapped = 0;
 448                 }
 449         }
 450
 451         /* don't actually do anything if we're in the LOSTLOCK state,
 452          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 453         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 454             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 455                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 456                 return;
 457         }
 458
 459         /* don't do anything if we're in the DISEQC state, since this
 460          * might be someone with a motorized dish controlled by DISEQC.
 461          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 462         if (fepriv->state & FESTATE_DISEQC) {
 463                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 464                 return;
 465         }
 466
 467         /* if we're in the RETUNE state, set everything up for a brand
 468          * new scan, keeping the current inversion setting, as the next
 469          * tune is _very_ likely to require the same */
 470         if (fepriv->state & FESTATE_RETUNE) {
 471                 fepriv->lnb_drift = 0;
 472                 fepriv->auto_step = 0;
 473                 fepriv->auto_sub_step = 0;
 474                 fepriv->started_auto_step = 0;
 475                 fepriv->check_wrapped = 0;
 476         }
 477
 478         /* fast zigzag. */
 479         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 480                 fepriv->delay = fepriv->min_delay;
 481
 482                 /* perform a tune */
 483                 retval = dvb_frontend_swzigzag_autotune(fe,
 484                                                         fepriv->check_wrapped);
 485                 if (retval < 0) {
 486                         return;
 487                 } else if (retval) {
 488                         /* OK, if we've run out of trials at the fast speed.
 489                          * Drop back to slow for the _next_ attempt */
 490                         fepriv->state = FESTATE_SEARCHING_SLOW;
 491                         fepriv->started_auto_step = fepriv->auto_step;
 492                         return;
 493                 }
 494                 fepriv->check_wrapped = 1;
 495
 496                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 497                  * This ensures we cannot return from an
 498                  * FE_SET_FRONTEND ioctl before the first frontend tune
 499                  * occurs */
 500                 if (fepriv->state & FESTATE_RETUNE) {
 501                         fepriv->state = FESTATE_TUNING_FAST;
 502                 }
 503         }
 504
 505         /* slow zigzag */
 506         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 507                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 508
 509                 /* Note: don't bother checking for wrapping; we stay in this
 510                  * state until we get a lock */
 511                 dvb_frontend_swzigzag_autotune(fe, 0);
 512         }
 513 }
 514
 515 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 516 {
 517         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 518
 519         if (fepriv->exit != DVB_FE_NO_EXIT)
 520                 return 1;
 521
 522         if (fepriv->dvbdev->writers == 1)
 523                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 524                                   dvb_shutdown_timeout * HZ))
 525                         return 1;
 526
 527         return 0;
 528 }
 529
 530 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 531 {
 532         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 533
 534         if (fepriv->wakeup) {
 535                 fepriv->wakeup = 0;
 536                 return 1;
 537         }
 538         return dvb_frontend_is_exiting(fe);
 539 }
 540
 541 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 542 {
 543         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 544
 545         fepriv->wakeup = 1;
 546         wake_up_interruptible(&fepriv->wait_queue);
 547 }
 548
 549 static int dvb_frontend_thread(void *data)
 550 {
 551         struct dvb_frontend *fe = data;
 552         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 553         fe_status_t s;
 554         enum dvbfe_algo algo;
 555
 556         bool re_tune = false;
 557
 558         dprintk("%s\n", __func__);
 559
 560         fepriv->check_wrapped = 0;
 561         fepriv->quality = 0;
 562         fepriv->delay = 3*HZ;
 563         fepriv->status = 0;
 564         fepriv->wakeup = 0;
 565         fepriv->reinitialise = 0;
 566
 567         dvb_frontend_init(fe);
 568
 569         set_freezable();
 570         while (1) {
 571                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 572 restart:
 573                 wait_event_interruptible_timeout(fepriv->wait_queue,
 574                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 575                                 || freezing(current),
 576                         fepriv->delay);
 577
 578                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 579                         /* got signal or quitting */
 580                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 581                         break;
 582                 }
 583
 584                 if (try_to_freeze())
 585                         goto restart;
 586
 587                 if (down_interruptible(&fepriv->sem))
 588                         break;
 589
 590                 if (fepriv->reinitialise) {
 591                         dvb_frontend_init(fe);
 592                         if (fe->ops.set_tone && fepriv->tone != -1)
 593                                 fe->ops.set_tone(fe, fepriv->tone);
 594                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 595                                 fe->ops.set_voltage(fe, fepriv->voltage);
 596                         fepriv->reinitialise = 0;
 597                 }
 598
 599                 /* do an iteration of the tuning loop */
 600                 if (fe->ops.get_frontend_algo) {
 601                         algo = fe->ops.get_frontend_algo(fe);
 602                         switch (algo) {
 603                         case DVBFE_ALGO_HW:
 604                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 605
 606                                 if (fepriv->state & FESTATE_RETUNE) {
 607                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 608                                         re_tune = true;
 609                                         fepriv->state = FESTATE_TUNED;
 610                                 }
 611
 612                                 if (fe->ops.tune)
 613                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 614
 615                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 616                                         dprintk("%s: state changed, adding current state\n", __func__);
 617                                         dvb_frontend_add_event(fe, s);
 618                                         fepriv->status = s;
 619                                 }
 620                                 break;
 621                         case DVBFE_ALGO_SW:
 622                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 623                                 dvb_frontend_swzigzag(fe);
 624                                 break;
 625                         case DVBFE_ALGO_CUSTOM:
 626                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 627                                 if (fepriv->state & FESTATE_RETUNE) {
 628                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 629                                         fepriv->state = FESTATE_TUNED;
 630                                 }
 631                                 /* Case where we are going to search for a carrier
 632                                  * User asked us to retune again for some reason, possibly
 633                                  * requesting a search with a new set of parameters
 634                                  */
 635                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 636                                         if (fe->ops.search) {
 637                                                 fepriv->algo_status = fe->ops.search(fe);
 638                                                 /* We did do a search as was requested, the flags are
 639                                                  * now unset as well and has the flags wrt to search.
 640                                                  */
 641                                         } else {
 642                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 643                                         }
 644                                 }
 645                                 /* Track the carrier if the search was successful */
 646                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 647                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 648                                         fepriv->delay = HZ / 2;
 649                                 }
 650                                 fepriv->parameters_out = fepriv->parameters_in;
 651                                 fe->ops.read_status(fe, &s);
 652                                 if (s != fepriv->status) {
 653                                         dvb_frontend_add_event(fe, s); /* update event list */
 654                                         fepriv->status = s;
 655                                         if (!(s & FE_HAS_LOCK)) {
 656                                                 fepriv->delay = HZ / 10;
 657                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 658                                         } else {
 659                                                 fepriv->delay = 60 * HZ;
 660                                         }
 661                                 }
 662                                 break;
 663                         default:
 664                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 665                                 break;
 666                         }
 667                 } else {
 668                         dvb_frontend_swzigzag(fe);
 669                 }
 670         }
 671
 672         if (dvb_powerdown_on_sleep) {
 673                 if (fe->ops.set_voltage)
 674                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 675                 if (fe->ops.tuner_ops.sleep) {
 676                         if (fe->ops.i2c_gate_ctrl)
 677                                 fe->ops.i2c_gate_ctrl(fe, 1);
 678                         fe->ops.tuner_ops.sleep(fe);
 679                         if (fe->ops.i2c_gate_ctrl)
 680                                 fe->ops.i2c_gate_ctrl(fe, 0);
 681                 }
 682                 if (fe->ops.sleep)
 683                         fe->ops.sleep(fe);
 684         }
 685
 686         fepriv->thread = NULL;
 687         if (kthread_should_stop())
 688                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 689         else
 690                 fepriv->exit = DVB_FE_NO_EXIT;
 691         mb();
 692
 693         dvb_frontend_wakeup(fe);
 694         return 0;
 695 }
 696
 697 static void dvb_frontend_stop(struct dvb_frontend *fe)
 698 {
 699         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 700
 701         dprintk ("%s\n", __func__);
 702
 703         fepriv->exit = DVB_FE_NORMAL_EXIT;
 704         mb();
 705
 706         if (!fepriv->thread)
 707                 return;
 708
 709         kthread_stop(fepriv->thread);
 710
 711         sema_init(&fepriv->sem, 1);
 712         fepriv->state = FESTATE_IDLE;
 713
 714         /* paranoia check in case a signal arrived */
 715         if (fepriv->thread)
 716                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 717                                 fepriv->thread);
 718 }
 719
 720 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 721 {
 722         return ((curtime.tv_usec < lasttime.tv_usec) ?
 723                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 724                 curtime.tv_usec - lasttime.tv_usec);
 725 }
 726 EXPORT_SYMBOL(timeval_usec_diff);
 727
 728 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 729 {
 730         curtime->tv_usec += add_usec;
 731         if (curtime->tv_usec >= 1000000) {
 732                 curtime->tv_usec -= 1000000;
 733                 curtime->tv_sec++;
 734         }
 735 }
 736
 737 /*
 738  * Sleep until gettimeofday() > waketime + add_usec
 739  * This needs to be as precise as possible, but as the delay is
 740  * usually between 2ms and 32ms, it is done using a scheduled msleep
 741  * followed by usleep (normally a busy-wait loop) for the remainder
 742  */
 743 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 744 {
 745         struct timeval lasttime;
 746         s32 delta, newdelta;
 747
 748         timeval_usec_add(waketime, add_usec);
 749
 750         do_gettimeofday(&lasttime);
 751         delta = timeval_usec_diff(lasttime, *waketime);
 752         if (delta > 2500) {
 753                 msleep((delta - 1500) / 1000);
 754                 do_gettimeofday(&lasttime);
 755                 newdelta = timeval_usec_diff(lasttime, *waketime);
 756                 delta = (newdelta > delta) ? 0 : newdelta;
 757         }
 758         if (delta > 0)
 759                 udelay(delta);
 760 }
 761 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 762
 763 static int dvb_frontend_start(struct dvb_frontend *fe)
 764 {
 765         int ret;
 766         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 767         struct task_struct *fe_thread;
 768
 769         dprintk ("%s\n", __func__);
 770
 771         if (fepriv->thread) {
 772                 if (fepriv->exit == DVB_FE_NO_EXIT)
 773                         return 0;
 774                 else
 775                         dvb_frontend_stop (fe);
 776         }
 777
 778         if (signal_pending(current))
 779                 return -EINTR;
 780         if (down_interruptible (&fepriv->sem))
 781                 return -EINTR;
 782
 783         fepriv->state = FESTATE_IDLE;
 784         fepriv->exit = DVB_FE_NO_EXIT;
 785         fepriv->thread = NULL;
 786         mb();
 787
 788         fe_thread = kthread_run(dvb_frontend_thread, fe,
 789                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 790         if (IS_ERR(fe_thread)) {
 791                 ret = PTR_ERR(fe_thread);
 792                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 793                 up(&fepriv->sem);
 794                 return ret;
 795         }
 796         fepriv->thread = fe_thread;
 797         return 0;
 798 }
 799
 800 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 801                                         u32 *freq_min, u32 *freq_max)
 802 {
 803         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 804
 805         if (fe->ops.info.frequency_max == 0)
 806                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 807         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 808                 *freq_max = fe->ops.info.frequency_max;
 809         else
 810                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 811
 812         if (*freq_min == 0 || *freq_max == 0)
 813                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 814                        fe->dvb->num,fe->id);
 815 }
 816
 817 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 818                                 struct dvb_frontend_parameters *parms)
 819 {
 820         u32 freq_min;
 821         u32 freq_max;
 822
 823         /* range check: frequency */
 824         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 825         if ((freq_min && parms->frequency < freq_min) ||
 826             (freq_max && parms->frequency > freq_max)) {
 827                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 828                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 829                 return -EINVAL;
 830         }
 831
 832         /* range check: symbol rate */
 833         if (fe->ops.info.type == FE_QPSK) {
 834                 if ((fe->ops.info.symbol_rate_min &&
 835                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 836                     (fe->ops.info.symbol_rate_max &&
 837                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 838                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 839                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 840                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 841                         return -EINVAL;
 842                 }
 843
 844         } else if (fe->ops.info.type == FE_QAM) {
 845                 if ((fe->ops.info.symbol_rate_min &&
 846                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 847                     (fe->ops.info.symbol_rate_max &&
 848                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 849                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 850                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 851                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 852                         return -EINVAL;
 853                 }
 854         }
 855
 856         /* check for supported modulation */
 857         if (fe->ops.info.type == FE_QAM &&
 858             (parms->u.qam.modulation > QAM_AUTO ||
 859              !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
 860                 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
 861                        fe->dvb->num, fe->id, parms->u.qam.modulation);
 862                         return -EINVAL;
 863         }
 864
 865         return 0;
 866 }
 867
 868 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 869 {
 870         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 871         int i;
 872
 873         memset(c, 0, sizeof(struct dtv_frontend_properties));
 874
 875         c->state = DTV_CLEAR;
 876         c->delivery_system = SYS_UNDEFINED;
 877         c->inversion = INVERSION_AUTO;
 878         c->fec_inner = FEC_AUTO;
 879         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 880         c->bandwidth_hz = BANDWIDTH_AUTO;
 881         c->guard_interval = GUARD_INTERVAL_AUTO;
 882         c->hierarchy = HIERARCHY_AUTO;
 883         c->symbol_rate = QAM_AUTO;
 884         c->code_rate_HP = FEC_AUTO;
 885         c->code_rate_LP = FEC_AUTO;
 886         c->rolloff = ROLLOFF_AUTO;
 887
 888         c->isdbt_partial_reception = -1;
 889         c->isdbt_sb_mode = -1;
 890         c->isdbt_sb_subchannel = -1;
 891         c->isdbt_sb_segment_idx = -1;
 892         c->isdbt_sb_segment_count = -1;
 893         c->isdbt_layer_enabled = 0x7;
 894         for (i = 0; i < 3; i++) {
 895                 c->layer[i].fec = FEC_AUTO;
 896                 c->layer[i].modulation = QAM_AUTO;
 897                 c->layer[i].interleaving = -1;
 898                 c->layer[i].segment_count = -1;
 899         }
 900
 901         return 0;
 902 }
 903
 904 #define _DTV_CMD(n, s, b) \
 905 [n] = { \
 906         .name = #n, \
 907         .cmd  = n, \
 908         .set  = s,\
 909         .buffer = b \
 910 }
 911
 912 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 913         _DTV_CMD(DTV_TUNE, 1, 0),
 914         _DTV_CMD(DTV_CLEAR, 1, 0),
 915
 916         /* Set */
 917         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 918         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 919         _DTV_CMD(DTV_MODULATION, 1, 0),
 920         _DTV_CMD(DTV_INVERSION, 1, 0),
 921         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 922         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 923         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 924         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 925         _DTV_CMD(DTV_TONE, 1, 0),
 926         _DTV_CMD(DTV_PILOT, 1, 0),
 927         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 928         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 929         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 930         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 931         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 932         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 933         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
 934
 935         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
 936         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
 937         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
 938         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
 939         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
 940         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
 941         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
 942         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
 943         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
 944         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
 945         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
 946         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
 947         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
 948         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
 949         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
 950         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
 951         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
 952         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
 953
 954         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
 955         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
 956         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
 957         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
 958         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
 959         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
 960         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
 961         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
 962         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
 963         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
 964         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
 965         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
 966         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
 967         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
 968         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
 969         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
 970         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
 971         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
 972
 973         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
 974         _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
 975
 976         /* Get */
 977         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
 978         _DTV_CMD(DTV_API_VERSION, 0, 0),
 979         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
 980         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
 981         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
 982         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
 983         _DTV_CMD(DTV_HIERARCHY, 0, 0),
 984
 985         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
 986 };
 987
 988 static void dtv_property_dump(struct dtv_property *tvp)
 989 {
 990         int i;
 991
 992         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 993                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 994                         __func__, tvp->cmd);
 995                 return;
 996         }
 997
 998         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 999                 ,__func__
1000                 ,tvp->cmd
1001                 ,dtv_cmds[ tvp->cmd ].name);
1002
1003         if(dtv_cmds[ tvp->cmd ].buffer) {
1004
1005                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1006                         ,__func__
1007                         ,tvp->u.buffer.len);
1008
1009                 for(i = 0; i < tvp->u.buffer.len; i++)
1010                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1011                                 ,__func__
1012                                 ,i
1013                                 ,tvp->u.buffer.data[i]);
1014
1015         } else
1016                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1017 }
1018
1019 static int is_legacy_delivery_system(fe_delivery_system_t s)
1020 {
1021         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_A) ||
1022            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1023            (s == SYS_ATSC))
1024                 return 1;
1025
1026         return 0;
1027 }
1028
1029 /* Initialize the cache with some default values derived from the
1030  * legacy frontend_info structure.
1031  */
1032 static void dtv_property_cache_init(struct dvb_frontend *fe,
1033                                     struct dtv_frontend_properties *c)
1034 {
1035         switch (fe->ops.info.type) {
1036         case FE_QPSK:
1037                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1038                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1039                 c->delivery_system = SYS_DVBS;
1040                 break;
1041         case FE_QAM:
1042                 c->delivery_system = SYS_DVBC_ANNEX_A;
1043                 break;
1044         case FE_OFDM:
1045                 c->delivery_system = SYS_DVBT;
1046                 break;
1047         case FE_ATSC:
1048                 break;
1049         }
1050 }
1051
1052 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1053  * drivers can use a single set_frontend tuning function, regardless of whether
1054  * it's being used for the legacy or new API, reducing code and complexity.
1055  */
1056 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1057                                     struct dtv_frontend_properties *c,
1058                                     const struct dvb_frontend_parameters *p)
1059 {
1060         c->frequency = p->frequency;
1061         c->inversion = p->inversion;
1062
1063         switch (fe->ops.info.type) {
1064         case FE_QPSK:
1065                 c->symbol_rate = p->u.qpsk.symbol_rate;
1066                 c->fec_inner = p->u.qpsk.fec_inner;
1067                 break;
1068         case FE_QAM:
1069                 c->symbol_rate = p->u.qam.symbol_rate;
1070                 c->fec_inner = p->u.qam.fec_inner;
1071                 c->modulation = p->u.qam.modulation;
1072                 break;
1073         case FE_OFDM:
1074                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1075                         c->bandwidth_hz = 6000000;
1076                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1077                         c->bandwidth_hz = 7000000;
1078                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1079                         c->bandwidth_hz = 8000000;
1080                 else
1081                         /* Including BANDWIDTH_AUTO */
1082                         c->bandwidth_hz = 0;
1083                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1084                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1085                 c->modulation = p->u.ofdm.constellation;
1086                 c->transmission_mode = p->u.ofdm.transmission_mode;
1087                 c->guard_interval = p->u.ofdm.guard_interval;
1088                 c->hierarchy = p->u.ofdm.hierarchy_information;
1089                 break;
1090         case FE_ATSC:
1091                 c->modulation = p->u.vsb.modulation;
1092                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1093                         c->delivery_system = SYS_ATSC;
1094                 else
1095                         c->delivery_system = SYS_DVBC_ANNEX_B;
1096                 break;
1097         }
1098 }
1099
1100 /* Ensure the cached values are set correctly in the frontend
1101  * legacy tuning structures, for the advanced tuning API.
1102  */
1103 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1104                                             struct dvb_frontend_parameters *p)
1105 {
1106         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1107
1108         p->frequency = c->frequency;
1109         p->inversion = c->inversion;
1110
1111         switch (fe->ops.info.type) {
1112         case FE_QPSK:
1113                 dprintk("%s() Preparing QPSK req\n", __func__);
1114                 p->u.qpsk.symbol_rate = c->symbol_rate;
1115                 p->u.qpsk.fec_inner = c->fec_inner;
1116                 break;
1117         case FE_QAM:
1118                 dprintk("%s() Preparing QAM req\n", __func__);
1119                 p->u.qam.symbol_rate = c->symbol_rate;
1120                 p->u.qam.fec_inner = c->fec_inner;
1121                 p->u.qam.modulation = c->modulation;
1122                 break;
1123         case FE_OFDM:
1124                 dprintk("%s() Preparing OFDM req\n", __func__);
1125                 if (c->bandwidth_hz == 6000000)
1126                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1127                 else if (c->bandwidth_hz == 7000000)
1128                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1129                 else if (c->bandwidth_hz == 8000000)
1130                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1131                 else
1132                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1133                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1134                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1135                 p->u.ofdm.constellation = c->modulation;
1136                 p->u.ofdm.transmission_mode = c->transmission_mode;
1137                 p->u.ofdm.guard_interval = c->guard_interval;
1138                 p->u.ofdm.hierarchy_information = c->hierarchy;
1139                 break;
1140         case FE_ATSC:
1141                 dprintk("%s() Preparing VSB req\n", __func__);
1142                 p->u.vsb.modulation = c->modulation;
1143                 break;
1144         }
1145 }
1146
1147 /* Ensure the cached values are set correctly in the frontend
1148  * legacy tuning structures, for the legacy tuning API.
1149  */
1150 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1151 {
1152         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1153         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1154         struct dvb_frontend_parameters *p = &fepriv->parameters_in;
1155         u32 rolloff = 0;
1156
1157         p->frequency = c->frequency;
1158         p->inversion = c->inversion;
1159
1160         if (c->delivery_system == SYS_DSS ||
1161             c->delivery_system == SYS_DVBS ||
1162             c->delivery_system == SYS_DVBS2 ||
1163             c->delivery_system == SYS_ISDBS ||
1164             c->delivery_system == SYS_TURBO) {
1165                 p->u.qpsk.symbol_rate = c->symbol_rate;
1166                 p->u.qpsk.fec_inner = c->fec_inner;
1167         }
1168
1169         /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1170         if ((c->delivery_system == SYS_ISDBT) ||
1171             (c->delivery_system == SYS_DVBT2)) {
1172                 p->u.ofdm.constellation = QAM_AUTO;
1173                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1174                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1175                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1176                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1177                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1178                 if (c->bandwidth_hz == 8000000)
1179                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1180                 else if (c->bandwidth_hz == 7000000)
1181                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1182                 else if (c->bandwidth_hz == 6000000)
1183                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1184                 else
1185                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1186         }
1187
1188         /*
1189          * Be sure that the bandwidth will be filled for all
1190          * non-satellite systems, as tuners need to know what
1191          * low pass/Nyquist half filter should be applied, in
1192          * order to avoid inter-channel noise.
1193          *
1194          * ISDB-T and DVB-T/T2 already sets bandwidth.
1195          * ATSC and DVB-C don't set, so, the core should fill it.
1196          *
1197          * On DVB-C Annex A and C, the bandwidth is a function of
1198          * the roll-off and symbol rate. Annex B defines different
1199          * roll-off factors depending on the modulation. Fortunately,
1200          * Annex B is only used with 6MHz, so there's no need to
1201          * calculate it.
1202          *
1203          * While not officially supported, a side effect of handling it at
1204          * the cache level is that a program could retrieve the bandwidth
1205          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1206          */
1207         switch (c->delivery_system) {
1208         case SYS_ATSC:
1209         case SYS_DVBC_ANNEX_B:
1210                 c->bandwidth_hz = 6000000;
1211                 break;
1212         case SYS_DVBC_ANNEX_A:
1213                 rolloff = 115;
1214                 break;
1215         case SYS_DVBC_ANNEX_C:
1216                 rolloff = 113;
1217                 break;
1218         default:
1219                 break;
1220         }
1221         if (rolloff)
1222                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
1223 }
1224
1225 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1226 {
1227         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1228         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1229
1230         /* For legacy delivery systems we don't need the delivery_system to
1231          * be specified, but we populate the older structures from the cache
1232          * so we can call set_frontend on older drivers.
1233          */
1234         if(is_legacy_delivery_system(c->delivery_system)) {
1235
1236                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1237                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_in);
1238
1239         } else {
1240                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1241
1242                 /* For advanced delivery systems / modulation types ...
1243                  * we seed the lecacy dvb_frontend_parameters structure
1244                  * so that the sanity checking code later in the IOCTL processing
1245                  * can validate our basic frequency ranges, symbolrates, modulation
1246                  * etc.
1247                  */
1248                 dtv_property_adv_params_sync(fe);
1249         }
1250 }
1251
1252 /**
1253  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1254  * @fe:         struct dvb_frontend pointer
1255  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1256  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1257  *
1258  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1259  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1260  * If p_out is not null, it will update the DVBv3 params pointed by it.
1261  */
1262 static int dtv_get_frontend(struct dvb_frontend *fe,
1263                             struct dvb_frontend_parameters *p_out)
1264 {
1265         int r;
1266
1267         if (fe->ops.get_frontend) {
1268                 r = fe->ops.get_frontend(fe);
1269                 if (unlikely(r < 0))
1270                         return r;
1271                 if (p_out)
1272                         dtv_property_legacy_params_sync(fe, p_out);
1273                 return 0;
1274         }
1275
1276         /* As everything is in cache, get_frontend fops are always supported */
1277         return 0;
1278 }
1279
1280 static int dvb_frontend_ioctl_legacy(struct file *file,
1281                         unsigned int cmd, void *parg);
1282 static int dvb_frontend_ioctl_properties(struct file *file,
1283                         unsigned int cmd, void *parg);
1284
1285 static void dtv_set_default_delivery_caps(const struct dvb_frontend *fe, struct dtv_property *p)
1286 {
1287         const struct dvb_frontend_info *info = &fe->ops.info;
1288         u32 ncaps = 0;
1289
1290         /*
1291          * If the frontend explicitly sets a list, use it, instead of
1292          * filling based on the info->type
1293          */
1294         if (fe->ops.delsys[ncaps]) {
1295                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1296                         p->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1297                         ncaps++;
1298                 }
1299                 p->u.buffer.len = ncaps;
1300                 return;
1301         }
1302         switch (info->type) {
1303         case FE_QPSK:
1304                 p->u.buffer.data[ncaps++] = SYS_DVBS;
1305                 if (info->caps & FE_CAN_2G_MODULATION)
1306                         p->u.buffer.data[ncaps++] = SYS_DVBS2;
1307                 if (info->caps & FE_CAN_TURBO_FEC)
1308                         p->u.buffer.data[ncaps++] = SYS_TURBO;
1309                 break;
1310         case FE_QAM:
1311                 p->u.buffer.data[ncaps++] = SYS_DVBC_ANNEX_A;
1312                 break;
1313         case FE_OFDM:
1314                 p->u.buffer.data[ncaps++] = SYS_DVBT;
1315                 if (info->caps & FE_CAN_2G_MODULATION)
1316                         p->u.buffer.data[ncaps++] = SYS_DVBT2;
1317                 break;
1318         case FE_ATSC:
1319                 if (info->caps & (FE_CAN_8VSB | FE_CAN_16VSB))
1320                         p->u.buffer.data[ncaps++] = SYS_ATSC;
1321                 if (info->caps & (FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_128 | FE_CAN_QAM_256))
1322                         p->u.buffer.data[ncaps++] = SYS_DVBC_ANNEX_B;
1323                 break;
1324         }
1325         p->u.buffer.len = ncaps;
1326 }
1327
1328 static int dtv_property_process_get(struct dvb_frontend *fe,
1329                                     const struct dtv_frontend_properties *c,
1330                                     struct dtv_property *tvp,
1331                                     struct file *file)
1332 {
1333         int r;
1334
1335         switch(tvp->cmd) {
1336         case DTV_ENUM_DELSYS:
1337                 dtv_set_default_delivery_caps(fe, tvp);
1338                 break;
1339         case DTV_FREQUENCY:
1340                 tvp->u.data = c->frequency;
1341                 break;
1342         case DTV_MODULATION:
1343                 tvp->u.data = c->modulation;
1344                 break;
1345         case DTV_BANDWIDTH_HZ:
1346                 tvp->u.data = c->bandwidth_hz;
1347                 break;
1348         case DTV_INVERSION:
1349                 tvp->u.data = c->inversion;
1350                 break;
1351         case DTV_SYMBOL_RATE:
1352                 tvp->u.data = c->symbol_rate;
1353                 break;
1354         case DTV_INNER_FEC:
1355                 tvp->u.data = c->fec_inner;
1356                 break;
1357         case DTV_PILOT:
1358                 tvp->u.data = c->pilot;
1359                 break;
1360         case DTV_ROLLOFF:
1361                 tvp->u.data = c->rolloff;
1362                 break;
1363         case DTV_DELIVERY_SYSTEM:
1364                 tvp->u.data = c->delivery_system;
1365                 break;
1366         case DTV_VOLTAGE:
1367                 tvp->u.data = c->voltage;
1368                 break;
1369         case DTV_TONE:
1370                 tvp->u.data = c->sectone;
1371                 break;
1372         case DTV_API_VERSION:
1373                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1374                 break;
1375         case DTV_CODE_RATE_HP:
1376                 tvp->u.data = c->code_rate_HP;
1377                 break;
1378         case DTV_CODE_RATE_LP:
1379                 tvp->u.data = c->code_rate_LP;
1380                 break;
1381         case DTV_GUARD_INTERVAL:
1382                 tvp->u.data = c->guard_interval;
1383                 break;
1384         case DTV_TRANSMISSION_MODE:
1385                 tvp->u.data = c->transmission_mode;
1386                 break;
1387         case DTV_HIERARCHY:
1388                 tvp->u.data = c->hierarchy;
1389                 break;
1390
1391         /* ISDB-T Support here */
1392         case DTV_ISDBT_PARTIAL_RECEPTION:
1393                 tvp->u.data = c->isdbt_partial_reception;
1394                 break;
1395         case DTV_ISDBT_SOUND_BROADCASTING:
1396                 tvp->u.data = c->isdbt_sb_mode;
1397                 break;
1398         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1399                 tvp->u.data = c->isdbt_sb_subchannel;
1400                 break;
1401         case DTV_ISDBT_SB_SEGMENT_IDX:
1402                 tvp->u.data = c->isdbt_sb_segment_idx;
1403                 break;
1404         case DTV_ISDBT_SB_SEGMENT_COUNT:
1405                 tvp->u.data = c->isdbt_sb_segment_count;
1406                 break;
1407         case DTV_ISDBT_LAYER_ENABLED:
1408                 tvp->u.data = c->isdbt_layer_enabled;
1409                 break;
1410         case DTV_ISDBT_LAYERA_FEC:
1411                 tvp->u.data = c->layer[0].fec;
1412                 break;
1413         case DTV_ISDBT_LAYERA_MODULATION:
1414                 tvp->u.data = c->layer[0].modulation;
1415                 break;
1416         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1417                 tvp->u.data = c->layer[0].segment_count;
1418                 break;
1419         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1420                 tvp->u.data = c->layer[0].interleaving;
1421                 break;
1422         case DTV_ISDBT_LAYERB_FEC:
1423                 tvp->u.data = c->layer[1].fec;
1424                 break;
1425         case DTV_ISDBT_LAYERB_MODULATION:
1426                 tvp->u.data = c->layer[1].modulation;
1427                 break;
1428         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1429                 tvp->u.data = c->layer[1].segment_count;
1430                 break;
1431         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1432                 tvp->u.data = c->layer[1].interleaving;
1433                 break;
1434         case DTV_ISDBT_LAYERC_FEC:
1435                 tvp->u.data = c->layer[2].fec;
1436                 break;
1437         case DTV_ISDBT_LAYERC_MODULATION:
1438                 tvp->u.data = c->layer[2].modulation;
1439                 break;
1440         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1441                 tvp->u.data = c->layer[2].segment_count;
1442                 break;
1443         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1444                 tvp->u.data = c->layer[2].interleaving;
1445                 break;
1446         case DTV_ISDBS_TS_ID:
1447                 tvp->u.data = c->isdbs_ts_id;
1448                 break;
1449         case DTV_DVBT2_PLP_ID:
1450                 tvp->u.data = c->dvbt2_plp_id;
1451                 break;
1452         default:
1453                 return -EINVAL;
1454         }
1455
1456         /* Allow the frontend to override outgoing properties */
1457         if (fe->ops.get_property) {
1458                 r = fe->ops.get_property(fe, tvp);
1459                 if (r < 0)
1460                         return r;
1461         }
1462
1463         dtv_property_dump(tvp);
1464
1465         return 0;
1466 }
1467
1468 static int dtv_property_process_set(struct dvb_frontend *fe,
1469                                     struct dtv_property *tvp,
1470                                     struct file *file)
1471 {
1472         int r = 0;
1473         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1474         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1475         dtv_property_dump(tvp);
1476
1477         /* Allow the frontend to validate incoming properties */
1478         if (fe->ops.set_property) {
1479                 r = fe->ops.set_property(fe, tvp);
1480                 if (r < 0)
1481                         return r;
1482         }
1483
1484         switch(tvp->cmd) {
1485         case DTV_CLEAR:
1486                 /* Reset a cache of data specific to the frontend here. This does
1487                  * not effect hardware.
1488                  */
1489                 dvb_frontend_clear_cache(fe);
1490                 dprintk("%s() Flushing property cache\n", __func__);
1491                 break;
1492         case DTV_TUNE:
1493                 /* interpret the cache of data, build either a traditional frontend
1494                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1495                  * ioctl.
1496                  */
1497                 c->state = tvp->cmd;
1498                 dprintk("%s() Finalised property cache\n", __func__);
1499                 dtv_property_cache_submit(fe);
1500
1501                 r = dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND,
1502                         &fepriv->parameters_in);
1503                 break;
1504         case DTV_FREQUENCY:
1505                 c->frequency = tvp->u.data;
1506                 break;
1507         case DTV_MODULATION:
1508                 c->modulation = tvp->u.data;
1509                 break;
1510         case DTV_BANDWIDTH_HZ:
1511                 c->bandwidth_hz = tvp->u.data;
1512                 break;
1513         case DTV_INVERSION:
1514                 c->inversion = tvp->u.data;
1515                 break;
1516         case DTV_SYMBOL_RATE:
1517                 c->symbol_rate = tvp->u.data;
1518                 break;
1519         case DTV_INNER_FEC:
1520                 c->fec_inner = tvp->u.data;
1521                 break;
1522         case DTV_PILOT:
1523                 c->pilot = tvp->u.data;
1524                 break;
1525         case DTV_ROLLOFF:
1526                 c->rolloff = tvp->u.data;
1527                 break;
1528         case DTV_DELIVERY_SYSTEM:
1529                 c->delivery_system = tvp->u.data;
1530                 break;
1531         case DTV_VOLTAGE:
1532                 c->voltage = tvp->u.data;
1533                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1534                         (void *)c->voltage);
1535                 break;
1536         case DTV_TONE:
1537                 c->sectone = tvp->u.data;
1538                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1539                         (void *)c->sectone);
1540                 break;
1541         case DTV_CODE_RATE_HP:
1542                 c->code_rate_HP = tvp->u.data;
1543                 break;
1544         case DTV_CODE_RATE_LP:
1545                 c->code_rate_LP = tvp->u.data;
1546                 break;
1547         case DTV_GUARD_INTERVAL:
1548                 c->guard_interval = tvp->u.data;
1549                 break;
1550         case DTV_TRANSMISSION_MODE:
1551                 c->transmission_mode = tvp->u.data;
1552                 break;
1553         case DTV_HIERARCHY:
1554                 c->hierarchy = tvp->u.data;
1555                 break;
1556
1557         /* ISDB-T Support here */
1558         case DTV_ISDBT_PARTIAL_RECEPTION:
1559                 c->isdbt_partial_reception = tvp->u.data;
1560                 break;
1561         case DTV_ISDBT_SOUND_BROADCASTING:
1562                 c->isdbt_sb_mode = tvp->u.data;
1563                 break;
1564         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1565                 c->isdbt_sb_subchannel = tvp->u.data;
1566                 break;
1567         case DTV_ISDBT_SB_SEGMENT_IDX:
1568                 c->isdbt_sb_segment_idx = tvp->u.data;
1569                 break;
1570         case DTV_ISDBT_SB_SEGMENT_COUNT:
1571                 c->isdbt_sb_segment_count = tvp->u.data;
1572                 break;
1573         case DTV_ISDBT_LAYER_ENABLED:
1574                 c->isdbt_layer_enabled = tvp->u.data;
1575                 break;
1576         case DTV_ISDBT_LAYERA_FEC:
1577                 c->layer[0].fec = tvp->u.data;
1578                 break;
1579         case DTV_ISDBT_LAYERA_MODULATION:
1580                 c->layer[0].modulation = tvp->u.data;
1581                 break;
1582         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1583                 c->layer[0].segment_count = tvp->u.data;
1584                 break;
1585         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1586                 c->layer[0].interleaving = tvp->u.data;
1587                 break;
1588         case DTV_ISDBT_LAYERB_FEC:
1589                 c->layer[1].fec = tvp->u.data;
1590                 break;
1591         case DTV_ISDBT_LAYERB_MODULATION:
1592                 c->layer[1].modulation = tvp->u.data;
1593                 break;
1594         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1595                 c->layer[1].segment_count = tvp->u.data;
1596                 break;
1597         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1598                 c->layer[1].interleaving = tvp->u.data;
1599                 break;
1600         case DTV_ISDBT_LAYERC_FEC:
1601                 c->layer[2].fec = tvp->u.data;
1602                 break;
1603         case DTV_ISDBT_LAYERC_MODULATION:
1604                 c->layer[2].modulation = tvp->u.data;
1605                 break;
1606         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1607                 c->layer[2].segment_count = tvp->u.data;
1608                 break;
1609         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1610                 c->layer[2].interleaving = tvp->u.data;
1611                 break;
1612         case DTV_ISDBS_TS_ID:
1613                 c->isdbs_ts_id = tvp->u.data;
1614                 break;
1615         case DTV_DVBT2_PLP_ID:
1616                 c->dvbt2_plp_id = tvp->u.data;
1617                 break;
1618         default:
1619                 return -EINVAL;
1620         }
1621
1622         return r;
1623 }
1624
1625 static int dvb_frontend_ioctl(struct file *file,
1626                         unsigned int cmd, void *parg)
1627 {
1628         struct dvb_device *dvbdev = file->private_data;
1629         struct dvb_frontend *fe = dvbdev->priv;
1630         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1631         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1632         int err = -EOPNOTSUPP;
1633
1634         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1635
1636         if (fepriv->exit != DVB_FE_NO_EXIT)
1637                 return -ENODEV;
1638
1639         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1640             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1641              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1642                 return -EPERM;
1643
1644         if (down_interruptible (&fepriv->sem))
1645                 return -ERESTARTSYS;
1646
1647         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1648                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1649         else {
1650                 c->state = DTV_UNDEFINED;
1651                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1652         }
1653
1654         up(&fepriv->sem);
1655         return err;
1656 }
1657
1658 static int dvb_frontend_ioctl_properties(struct file *file,
1659                         unsigned int cmd, void *parg)
1660 {
1661         struct dvb_device *dvbdev = file->private_data;
1662         struct dvb_frontend *fe = dvbdev->priv;
1663         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1664         int err = 0;
1665
1666         struct dtv_properties *tvps = NULL;
1667         struct dtv_property *tvp = NULL;
1668         int i;
1669
1670         dprintk("%s\n", __func__);
1671
1672         if(cmd == FE_SET_PROPERTY) {
1673                 tvps = (struct dtv_properties __user *)parg;
1674
1675                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1676                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1677
1678                 /* Put an arbitrary limit on the number of messages that can
1679                  * be sent at once */
1680                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1681                         return -EINVAL;
1682
1683                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1684                 if (!tvp) {
1685                         err = -ENOMEM;
1686                         goto out;
1687                 }
1688
1689                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1690                         err = -EFAULT;
1691                         goto out;
1692                 }
1693
1694                 for (i = 0; i < tvps->num; i++) {
1695                         err = dtv_property_process_set(fe, tvp + i, file);
1696                         if (err < 0)
1697                                 goto out;
1698                         (tvp + i)->result = err;
1699                 }
1700
1701                 if (c->state == DTV_TUNE)
1702                         dprintk("%s() Property cache is full, tuning\n", __func__);
1703
1704         } else
1705         if(cmd == FE_GET_PROPERTY) {
1706                 tvps = (struct dtv_properties __user *)parg;
1707
1708                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1709                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1710
1711                 /* Put an arbitrary limit on the number of messages that can
1712                  * be sent at once */
1713                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1714                         return -EINVAL;
1715
1716                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1717                 if (!tvp) {
1718                         err = -ENOMEM;
1719                         goto out;
1720                 }
1721
1722                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1723                         err = -EFAULT;
1724                         goto out;
1725                 }
1726
1727                 /*
1728                  * Fills the cache out struct with the cache contents, plus
1729                  * the data retrieved from get_frontend.
1730                  */
1731                 dtv_get_frontend(fe, NULL);
1732                 for (i = 0; i < tvps->num; i++) {
1733                         err = dtv_property_process_get(fe, c, tvp + i, file);
1734                         if (err < 0)
1735                                 goto out;
1736                         (tvp + i)->result = err;
1737                 }
1738
1739                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1740                         err = -EFAULT;
1741                         goto out;
1742                 }
1743
1744         } else
1745                 err = -EOPNOTSUPP;
1746
1747 out:
1748         kfree(tvp);
1749         return err;
1750 }
1751
1752 static int dvb_frontend_ioctl_legacy(struct file *file,
1753                         unsigned int cmd, void *parg)
1754 {
1755         struct dvb_device *dvbdev = file->private_data;
1756         struct dvb_frontend *fe = dvbdev->priv;
1757         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1758         int cb_err, err = -EOPNOTSUPP;
1759
1760         if (fe->dvb->fe_ioctl_override) {
1761                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1762                                                     DVB_FE_IOCTL_PRE);
1763                 if (cb_err < 0)
1764                         return cb_err;
1765                 if (cb_err > 0)
1766                         return 0;
1767                 /* fe_ioctl_override returning 0 allows
1768                  * dvb-core to continue handling the ioctl */
1769         }
1770
1771         switch (cmd) {
1772         case FE_GET_INFO: {
1773                 struct dvb_frontend_info* info = parg;
1774                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1775                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1776
1777                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1778                  * do it, it is done for it. */
1779                 info->caps |= FE_CAN_INVERSION_AUTO;
1780                 err = 0;
1781                 break;
1782         }
1783
1784         case FE_READ_STATUS: {
1785                 fe_status_t* status = parg;
1786
1787                 /* if retune was requested but hasn't occurred yet, prevent
1788                  * that user get signal state from previous tuning */
1789                 if (fepriv->state == FESTATE_RETUNE ||
1790                     fepriv->state == FESTATE_ERROR) {
1791                         err=0;
1792                         *status = 0;
1793                         break;
1794                 }
1795
1796                 if (fe->ops.read_status)
1797                         err = fe->ops.read_status(fe, status);
1798                 break;
1799         }
1800         case FE_READ_BER:
1801                 if (fe->ops.read_ber)
1802                         err = fe->ops.read_ber(fe, (__u32*) parg);
1803                 break;
1804
1805         case FE_READ_SIGNAL_STRENGTH:
1806                 if (fe->ops.read_signal_strength)
1807                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1808                 break;
1809
1810         case FE_READ_SNR:
1811                 if (fe->ops.read_snr)
1812                         err = fe->ops.read_snr(fe, (__u16*) parg);
1813                 break;
1814
1815         case FE_READ_UNCORRECTED_BLOCKS:
1816                 if (fe->ops.read_ucblocks)
1817                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1818                 break;
1819
1820
1821         case FE_DISEQC_RESET_OVERLOAD:
1822                 if (fe->ops.diseqc_reset_overload) {
1823                         err = fe->ops.diseqc_reset_overload(fe);
1824                         fepriv->state = FESTATE_DISEQC;
1825                         fepriv->status = 0;
1826                 }
1827                 break;
1828
1829         case FE_DISEQC_SEND_MASTER_CMD:
1830                 if (fe->ops.diseqc_send_master_cmd) {
1831                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1832                         fepriv->state = FESTATE_DISEQC;
1833                         fepriv->status = 0;
1834                 }
1835                 break;
1836
1837         case FE_DISEQC_SEND_BURST:
1838                 if (fe->ops.diseqc_send_burst) {
1839                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1840                         fepriv->state = FESTATE_DISEQC;
1841                         fepriv->status = 0;
1842                 }
1843                 break;
1844
1845         case FE_SET_TONE:
1846                 if (fe->ops.set_tone) {
1847                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1848                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1849                         fepriv->state = FESTATE_DISEQC;
1850                         fepriv->status = 0;
1851                 }
1852                 break;
1853
1854         case FE_SET_VOLTAGE:
1855                 if (fe->ops.set_voltage) {
1856                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1857                         fepriv->voltage = (fe_sec_voltage_t) parg;
1858                         fepriv->state = FESTATE_DISEQC;
1859                         fepriv->status = 0;
1860                 }
1861                 break;
1862
1863         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1864                 if (fe->ops.dishnetwork_send_legacy_command) {
1865                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1866                         fepriv->state = FESTATE_DISEQC;
1867                         fepriv->status = 0;
1868                 } else if (fe->ops.set_voltage) {
1869                         /*
1870                          * NOTE: This is a fallback condition.  Some frontends
1871                          * (stv0299 for instance) take longer than 8msec to
1872                          * respond to a set_voltage command.  Those switches
1873                          * need custom routines to switch properly.  For all
1874                          * other frontends, the following should work ok.
1875                          * Dish network legacy switches (as used by Dish500)
1876                          * are controlled by sending 9-bit command words
1877                          * spaced 8msec apart.
1878                          * the actual command word is switch/port dependent
1879                          * so it is up to the userspace application to send
1880                          * the right command.
1881                          * The command must always start with a '0' after
1882                          * initialization, so parg is 8 bits and does not
1883                          * include the initialization or start bit
1884                          */
1885                         unsigned long swcmd = ((unsigned long) parg) << 1;
1886                         struct timeval nexttime;
1887                         struct timeval tv[10];
1888                         int i;
1889                         u8 last = 1;
1890                         if (dvb_frontend_debug)
1891                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1892                         do_gettimeofday(&nexttime);
1893                         if (dvb_frontend_debug)
1894                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1895                         /* before sending a command, initialize by sending
1896                          * a 32ms 18V to the switch
1897                          */
1898                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1899                         dvb_frontend_sleep_until(&nexttime, 32000);
1900
1901                         for (i = 0; i < 9; i++) {
1902                                 if (dvb_frontend_debug)
1903                                         do_gettimeofday(&tv[i + 1]);
1904                                 if ((swcmd & 0x01) != last) {
1905                                         /* set voltage to (last ? 13V : 18V) */
1906                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1907                                         last = (last) ? 0 : 1;
1908                                 }
1909                                 swcmd = swcmd >> 1;
1910                                 if (i != 8)
1911                                         dvb_frontend_sleep_until(&nexttime, 8000);
1912                         }
1913                         if (dvb_frontend_debug) {
1914                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1915                                         __func__, fe->dvb->num);
1916                                 for (i = 1; i < 10; i++)
1917                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1918                         }
1919                         err = 0;
1920                         fepriv->state = FESTATE_DISEQC;
1921                         fepriv->status = 0;
1922                 }
1923                 break;
1924
1925         case FE_DISEQC_RECV_SLAVE_REPLY:
1926                 if (fe->ops.diseqc_recv_slave_reply)
1927                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1928                 break;
1929
1930         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1931                 if (fe->ops.enable_high_lnb_voltage)
1932                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1933                 break;
1934
1935         case FE_SET_FRONTEND: {
1936                 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1937                 struct dvb_frontend_tune_settings fetunesettings;
1938
1939                 if (c->state == DTV_TUNE) {
1940                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters_in) < 0) {
1941                                 err = -EINVAL;
1942                                 break;
1943                         }
1944                 } else {
1945                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1946                                 err = -EINVAL;
1947                                 break;
1948                         }
1949
1950                         memcpy (&fepriv->parameters_in, parg,
1951                                 sizeof (struct dvb_frontend_parameters));
1952                         dtv_property_cache_init(fe, c);
1953                         dtv_property_cache_sync(fe, c, &fepriv->parameters_in);
1954                 }
1955
1956                 /*
1957                  * Initialize output parameters to match the values given by
1958                  * the user. FE_SET_FRONTEND triggers an initial frontend event
1959                  * with status = 0, which copies output parameters to userspace.
1960                  */
1961                 fepriv->parameters_out = fepriv->parameters_in;
1962
1963                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1964
1965                 /* force auto frequency inversion if requested */
1966                 if (dvb_force_auto_inversion) {
1967                         c->inversion = INVERSION_AUTO;
1968                 }
1969                 if (fe->ops.info.type == FE_OFDM) {
1970                         /* without hierarchical coding code_rate_LP is irrelevant,
1971                          * so we tolerate the otherwise invalid FEC_NONE setting */
1972                         if (c->hierarchy == HIERARCHY_NONE &&
1973                             c->code_rate_LP == FEC_NONE)
1974                                 c->code_rate_LP = FEC_AUTO;
1975                 }
1976
1977                 /* get frontend-specific tuning settings */
1978                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1979                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1980                         fepriv->max_drift = fetunesettings.max_drift;
1981                         fepriv->step_size = fetunesettings.step_size;
1982                 } else {
1983                         /* default values */
1984                         switch(fe->ops.info.type) {
1985                         case FE_QPSK:
1986                                 fepriv->min_delay = HZ/20;
1987                                 fepriv->step_size = c->symbol_rate / 16000;
1988                                 fepriv->max_drift = c->symbol_rate / 2000;
1989                                 break;
1990
1991                         case FE_QAM:
1992                                 fepriv->min_delay = HZ/20;
1993                                 fepriv->step_size = 0; /* no zigzag */
1994                                 fepriv->max_drift = 0;
1995                                 break;
1996
1997                         case FE_OFDM:
1998                                 fepriv->min_delay = HZ/20;
1999                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2000                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2001                                 break;
2002                         case FE_ATSC:
2003                                 fepriv->min_delay = HZ/20;
2004                                 fepriv->step_size = 0;
2005                                 fepriv->max_drift = 0;
2006                                 break;
2007                         }
2008                 }
2009                 if (dvb_override_tune_delay > 0)
2010                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2011
2012                 fepriv->state = FESTATE_RETUNE;
2013
2014                 /* Request the search algorithm to search */
2015                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2016
2017                 dvb_frontend_clear_events(fe);
2018                 dvb_frontend_add_event(fe, 0);
2019                 dvb_frontend_wakeup(fe);
2020                 fepriv->status = 0;
2021                 err = 0;
2022                 break;
2023         }
2024
2025         case FE_GET_EVENT:
2026                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2027                 break;
2028
2029         case FE_GET_FRONTEND:
2030                 err = dtv_get_frontend(fe, &fepriv->parameters_out);
2031                 if (err >= 0)
2032                         memcpy(parg, &fepriv->parameters_out,
2033                                sizeof(struct dvb_frontend_parameters));
2034                 break;
2035
2036         case FE_SET_FRONTEND_TUNE_MODE:
2037                 fepriv->tune_mode_flags = (unsigned long) parg;
2038                 err = 0;
2039                 break;
2040         };
2041
2042         if (fe->dvb->fe_ioctl_override) {
2043                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
2044                                                     DVB_FE_IOCTL_POST);
2045                 if (cb_err < 0)
2046                         return cb_err;
2047         }
2048
2049         return err;
2050 }
2051
2052
2053 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2054 {
2055         struct dvb_device *dvbdev = file->private_data;
2056         struct dvb_frontend *fe = dvbdev->priv;
2057         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2058
2059         dprintk ("%s\n", __func__);
2060
2061         poll_wait (file, &fepriv->events.wait_queue, wait);
2062
2063         if (fepriv->events.eventw != fepriv->events.eventr)
2064                 return (POLLIN | POLLRDNORM | POLLPRI);
2065
2066         return 0;
2067 }
2068
2069 static int dvb_frontend_open(struct inode *inode, struct file *file)
2070 {
2071         struct dvb_device *dvbdev = file->private_data;
2072         struct dvb_frontend *fe = dvbdev->priv;
2073         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2074         struct dvb_adapter *adapter = fe->dvb;
2075         int ret;
2076
2077         dprintk ("%s\n", __func__);
2078         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2079                 return -ENODEV;
2080
2081         if (adapter->mfe_shared) {
2082                 mutex_lock (&adapter->mfe_lock);
2083
2084                 if (adapter->mfe_dvbdev == NULL)
2085                         adapter->mfe_dvbdev = dvbdev;
2086
2087                 else if (adapter->mfe_dvbdev != dvbdev) {
2088                         struct dvb_device
2089                                 *mfedev = adapter->mfe_dvbdev;
2090                         struct dvb_frontend
2091                                 *mfe = mfedev->priv;
2092                         struct dvb_frontend_private
2093                                 *mfepriv = mfe->frontend_priv;
2094                         int mferetry = (dvb_mfe_wait_time << 1);
2095
2096                         mutex_unlock (&adapter->mfe_lock);
2097                         while (mferetry-- && (mfedev->users != -1 ||
2098                                         mfepriv->thread != NULL)) {
2099                                 if(msleep_interruptible(500)) {
2100                                         if(signal_pending(current))
2101                                                 return -EINTR;
2102                                 }
2103                         }
2104
2105                         mutex_lock (&adapter->mfe_lock);
2106                         if(adapter->mfe_dvbdev != dvbdev) {
2107                                 mfedev = adapter->mfe_dvbdev;
2108                                 mfe = mfedev->priv;
2109                                 mfepriv = mfe->frontend_priv;
2110                                 if (mfedev->users != -1 ||
2111                                                 mfepriv->thread != NULL) {
2112                                         mutex_unlock (&adapter->mfe_lock);
2113                                         return -EBUSY;
2114                                 }
2115                                 adapter->mfe_dvbdev = dvbdev;
2116                         }
2117                 }
2118         }
2119
2120         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2121                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2122                         goto err0;
2123
2124                 /* If we took control of the bus, we need to force
2125                    reinitialization.  This is because many ts_bus_ctrl()
2126                    functions strobe the RESET pin on the demod, and if the
2127                    frontend thread already exists then the dvb_init() routine
2128                    won't get called (which is what usually does initial
2129                    register configuration). */
2130                 fepriv->reinitialise = 1;
2131         }
2132
2133         if ((ret = dvb_generic_open (inode, file)) < 0)
2134                 goto err1;
2135
2136         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2137                 /* normal tune mode when opened R/W */
2138                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2139                 fepriv->tone = -1;
2140                 fepriv->voltage = -1;
2141
2142                 ret = dvb_frontend_start (fe);
2143                 if (ret)
2144                         goto err2;
2145
2146                 /*  empty event queue */
2147                 fepriv->events.eventr = fepriv->events.eventw = 0;
2148         }
2149
2150         if (adapter->mfe_shared)
2151                 mutex_unlock (&adapter->mfe_lock);
2152         return ret;
2153
2154 err2:
2155         dvb_generic_release(inode, file);
2156 err1:
2157         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2158                 fe->ops.ts_bus_ctrl(fe, 0);
2159 err0:
2160         if (adapter->mfe_shared)
2161                 mutex_unlock (&adapter->mfe_lock);
2162         return ret;
2163 }
2164
2165 static int dvb_frontend_release(struct inode *inode, struct file *file)
2166 {
2167         struct dvb_device *dvbdev = file->private_data;
2168         struct dvb_frontend *fe = dvbdev->priv;
2169         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2170         int ret;
2171
2172         dprintk ("%s\n", __func__);
2173
2174         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2175                 fepriv->release_jiffies = jiffies;
2176                 mb();
2177         }
2178
2179         ret = dvb_generic_release (inode, file);
2180
2181         if (dvbdev->users == -1) {
2182                 wake_up(&fepriv->wait_queue);
2183                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2184                         fops_put(file->f_op);
2185                         file->f_op = NULL;
2186                         wake_up(&dvbdev->wait_queue);
2187                 }
2188                 if (fe->ops.ts_bus_ctrl)
2189                         fe->ops.ts_bus_ctrl(fe, 0);
2190         }
2191
2192         return ret;
2193 }
2194
2195 static const struct file_operations dvb_frontend_fops = {
2196         .owner          = THIS_MODULE,
2197         .unlocked_ioctl = dvb_generic_ioctl,
2198         .poll           = dvb_frontend_poll,
2199         .open           = dvb_frontend_open,
2200         .release        = dvb_frontend_release,
2201         .llseek         = noop_llseek,
2202 };
2203
2204 int dvb_register_frontend(struct dvb_adapter* dvb,
2205                           struct dvb_frontend* fe)
2206 {
2207         struct dvb_frontend_private *fepriv;
2208         static const struct dvb_device dvbdev_template = {
2209                 .users = ~0,
2210                 .writers = 1,
2211                 .readers = (~0)-1,
2212                 .fops = &dvb_frontend_fops,
2213                 .kernel_ioctl = dvb_frontend_ioctl
2214         };
2215
2216         dprintk ("%s\n", __func__);
2217
2218         if (mutex_lock_interruptible(&frontend_mutex))
2219                 return -ERESTARTSYS;
2220
2221         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2222         if (fe->frontend_priv == NULL) {
2223                 mutex_unlock(&frontend_mutex);
2224                 return -ENOMEM;
2225         }
2226         fepriv = fe->frontend_priv;
2227
2228         sema_init(&fepriv->sem, 1);
2229         init_waitqueue_head (&fepriv->wait_queue);
2230         init_waitqueue_head (&fepriv->events.wait_queue);
2231         mutex_init(&fepriv->events.mtx);
2232         fe->dvb = dvb;
2233         fepriv->inversion = INVERSION_OFF;
2234
2235         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2236                 fe->dvb->num,
2237                 fe->id,
2238                 fe->ops.info.name);
2239
2240         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2241                              fe, DVB_DEVICE_FRONTEND);
2242
2243         mutex_unlock(&frontend_mutex);
2244         return 0;
2245 }
2246 EXPORT_SYMBOL(dvb_register_frontend);
2247
2248 int dvb_unregister_frontend(struct dvb_frontend* fe)
2249 {
2250         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2251         dprintk ("%s\n", __func__);
2252
2253         mutex_lock(&frontend_mutex);
2254         dvb_frontend_stop (fe);
2255         mutex_unlock(&frontend_mutex);
2256
2257         if (fepriv->dvbdev->users < -1)
2258                 wait_event(fepriv->dvbdev->wait_queue,
2259                                 fepriv->dvbdev->users==-1);
2260
2261         mutex_lock(&frontend_mutex);
2262         dvb_unregister_device (fepriv->dvbdev);
2263
2264         /* fe is invalid now */
2265         kfree(fepriv);
2266         mutex_unlock(&frontend_mutex);
2267         return 0;
2268 }
2269 EXPORT_SYMBOL(dvb_unregister_frontend);
2270
2271 #ifdef CONFIG_MEDIA_ATTACH
2272 void dvb_frontend_detach(struct dvb_frontend* fe)
2273 {
2274         void *ptr;
2275
2276         if (fe->ops.release_sec) {
2277                 fe->ops.release_sec(fe);
2278                 symbol_put_addr(fe->ops.release_sec);
2279         }
2280         if (fe->ops.tuner_ops.release) {
2281                 fe->ops.tuner_ops.release(fe);
2282                 symbol_put_addr(fe->ops.tuner_ops.release);
2283         }
2284         if (fe->ops.analog_ops.release) {
2285                 fe->ops.analog_ops.release(fe);
2286                 symbol_put_addr(fe->ops.analog_ops.release);
2287         }
2288         ptr = (void*)fe->ops.release;
2289         if (ptr) {
2290                 fe->ops.release(fe);
2291                 symbol_put_addr(ptr);
2292         }
2293 }
2294 #else
2295 void dvb_frontend_detach(struct dvb_frontend* fe)
2296 {
2297         if (fe->ops.release_sec)
2298                 fe->ops.release_sec(fe);
2299         if (fe->ops.tuner_ops.release)
2300                 fe->ops.tuner_ops.release(fe);
2301         if (fe->ops.analog_ops.release)
2302                 fe->ops.analog_ops.release(fe);
2303         if (fe->ops.release)
2304                 fe->ops.release(fe);
2305 }
2306 #endif
2307 EXPORT_SYMBOL(dvb_frontend_detach);