git.oblomov.eu Git - linux-2.6/blob - 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 #include <linux/string.h>
  29 #include <linux/kernel.h>
  30 #include <linux/sched.h>
  31 #include <linux/wait.h>
  32 #include <linux/slab.h>
  33 #include <linux/poll.h>
  34 #include <linux/module.h>
  35 #include <linux/list.h>
  36 #include <linux/freezer.h>
  37 #include <linux/jiffies.h>
  38 #include <linux/kthread.h>
  39 #include <asm/processor.h>
  40
  41 #include "dvb_frontend.h"
  42 #include "dvbdev.h"
  43 #include <linux/dvb/version.h>
  44
  45 static int dvb_frontend_debug;
  46 static int dvb_shutdown_timeout;
  47 static int dvb_force_auto_inversion;
  48 static int dvb_override_tune_delay;
  49 static int dvb_powerdown_on_sleep = 1;
  50 static int dvb_mfe_wait_time = 5;
  51
  52 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  53 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  54 module_param(dvb_shutdown_timeout, int, 0644);
  55 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  56 module_param(dvb_force_auto_inversion, int, 0644);
  57 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  58 module_param(dvb_override_tune_delay, int, 0644);
  59 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  60 module_param(dvb_powerdown_on_sleep, int, 0644);
  61 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  62 module_param(dvb_mfe_wait_time, int, 0644);
  63 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)");
  64
  65 #define dprintk if (dvb_frontend_debug) printk
  66
  67 #define FESTATE_IDLE 1
  68 #define FESTATE_RETUNE 2
  69 #define FESTATE_TUNING_FAST 4
  70 #define FESTATE_TUNING_SLOW 8
  71 #define FESTATE_TUNED 16
  72 #define FESTATE_ZIGZAG_FAST 32
  73 #define FESTATE_ZIGZAG_SLOW 64
  74 #define FESTATE_DISEQC 128
  75 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  76 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  77 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  78 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  79
  80 #define FE_ALGO_HW              1
  81 /*
  82  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  83  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  84  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  85  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  86  * FESTATE_TUNED. The frontend has successfully locked on.
  87  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  88  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  89  * FESTATE_DISEQC. A DISEQC command has just been issued.
  90  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  91  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  92  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  93  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  94  */
  95
  96 static DEFINE_MUTEX(frontend_mutex);
  97
  98 struct dvb_frontend_private {
  99
 100         /* thread/frontend values */
 101         struct dvb_device *dvbdev;
 102         struct dvb_frontend_parameters parameters;
 103         struct dvb_fe_events events;
 104         struct semaphore sem;
 105         struct list_head list_head;
 106         wait_queue_head_t wait_queue;
 107         struct task_struct *thread;
 108         unsigned long release_jiffies;
 109         unsigned int exit;
 110         unsigned int wakeup;
 111         fe_status_t status;
 112         unsigned long tune_mode_flags;
 113         unsigned int delay;
 114         unsigned int reinitialise;
 115         int tone;
 116         int voltage;
 117
 118         /* swzigzag values */
 119         unsigned int state;
 120         unsigned int bending;
 121         int lnb_drift;
 122         unsigned int inversion;
 123         unsigned int auto_step;
 124         unsigned int auto_sub_step;
 125         unsigned int started_auto_step;
 126         unsigned int min_delay;
 127         unsigned int max_drift;
 128         unsigned int step_size;
 129         int quality;
 130         unsigned int check_wrapped;
 131 };
 132
 133 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 134
 135 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 136 {
 137         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 138         struct dvb_fe_events *events = &fepriv->events;
 139         struct dvb_frontend_event *e;
 140         int wp;
 141
 142         dprintk ("%s\n", __func__);
 143
 144         if (mutex_lock_interruptible (&events->mtx))
 145                 return;
 146
 147         wp = (events->eventw + 1) % MAX_EVENT;
 148
 149         if (wp == events->eventr) {
 150                 events->overflow = 1;
 151                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 152         }
 153
 154         e = &events->events[events->eventw];
 155
 156         memcpy (&e->parameters, &fepriv->parameters,
 157                 sizeof (struct dvb_frontend_parameters));
 158
 159         if (status & FE_HAS_LOCK)
 160                 if (fe->ops.get_frontend)
 161                         fe->ops.get_frontend(fe, &e->parameters);
 162
 163         events->eventw = wp;
 164
 165         mutex_unlock(&events->mtx);
 166
 167         e->status = status;
 168
 169         wake_up_interruptible (&events->wait_queue);
 170 }
 171
 172 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 173                             struct dvb_frontend_event *event, int flags)
 174 {
 175         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 176         struct dvb_fe_events *events = &fepriv->events;
 177
 178         dprintk ("%s\n", __func__);
 179
 180         if (events->overflow) {
 181                 events->overflow = 0;
 182                 return -EOVERFLOW;
 183         }
 184
 185         if (events->eventw == events->eventr) {
 186                 int ret;
 187
 188                 if (flags & O_NONBLOCK)
 189                         return -EWOULDBLOCK;
 190
 191                 up(&fepriv->sem);
 192
 193                 ret = wait_event_interruptible (events->wait_queue,
 194                                                 events->eventw != events->eventr);
 195
 196                 if (down_interruptible (&fepriv->sem))
 197                         return -ERESTARTSYS;
 198
 199                 if (ret < 0)
 200                         return ret;
 201         }
 202
 203         if (mutex_lock_interruptible (&events->mtx))
 204                 return -ERESTARTSYS;
 205
 206         memcpy (event, &events->events[events->eventr],
 207                 sizeof(struct dvb_frontend_event));
 208
 209         events->eventr = (events->eventr + 1) % MAX_EVENT;
 210
 211         mutex_unlock(&events->mtx);
 212
 213         return 0;
 214 }
 215
 216 static void dvb_frontend_init(struct dvb_frontend *fe)
 217 {
 218         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 219                  fe->dvb->num,
 220                  fe->id,
 221                  fe->ops.info.name);
 222
 223         if (fe->ops.init)
 224                 fe->ops.init(fe);
 225         if (fe->ops.tuner_ops.init) {
 226                 if (fe->ops.i2c_gate_ctrl)
 227                         fe->ops.i2c_gate_ctrl(fe, 1);
 228                 fe->ops.tuner_ops.init(fe);
 229                 if (fe->ops.i2c_gate_ctrl)
 230                         fe->ops.i2c_gate_ctrl(fe, 0);
 231         }
 232 }
 233
 234 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 235 {
 236         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 237
 238         fepriv->reinitialise = 1;
 239         dvb_frontend_wakeup(fe);
 240 }
 241 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 242
 243 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 244 {
 245         int q2;
 246
 247         dprintk ("%s\n", __func__);
 248
 249         if (locked)
 250                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 251         else
 252                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 253
 254         q2 = fepriv->quality - 128;
 255         q2 *= q2;
 256
 257         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 258 }
 259
 260 /**
 261  * Performs automatic twiddling of frontend parameters.
 262  *
 263  * @param fe The frontend concerned.
 264  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 265  * @returns Number of complete iterations that have been performed.
 266  */
 267 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 268 {
 269         int autoinversion;
 270         int ready = 0;
 271         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 272         int original_inversion = fepriv->parameters.inversion;
 273         u32 original_frequency = fepriv->parameters.frequency;
 274
 275         /* are we using autoinversion? */
 276         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 277                          (fepriv->parameters.inversion == INVERSION_AUTO));
 278
 279         /* setup parameters correctly */
 280         while(!ready) {
 281                 /* calculate the lnb_drift */
 282                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 283
 284                 /* wrap the auto_step if we've exceeded the maximum drift */
 285                 if (fepriv->lnb_drift > fepriv->max_drift) {
 286                         fepriv->auto_step = 0;
 287                         fepriv->auto_sub_step = 0;
 288                         fepriv->lnb_drift = 0;
 289                 }
 290
 291                 /* perform inversion and +/- zigzag */
 292                 switch(fepriv->auto_sub_step) {
 293                 case 0:
 294                         /* try with the current inversion and current drift setting */
 295                         ready = 1;
 296                         break;
 297
 298                 case 1:
 299                         if (!autoinversion) break;
 300
 301                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 302                         ready = 1;
 303                         break;
 304
 305                 case 2:
 306                         if (fepriv->lnb_drift == 0) break;
 307
 308                         fepriv->lnb_drift = -fepriv->lnb_drift;
 309                         ready = 1;
 310                         break;
 311
 312                 case 3:
 313                         if (fepriv->lnb_drift == 0) break;
 314                         if (!autoinversion) break;
 315
 316                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 317                         fepriv->lnb_drift = -fepriv->lnb_drift;
 318                         ready = 1;
 319                         break;
 320
 321                 default:
 322                         fepriv->auto_step++;
 323                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 324                         break;
 325                 }
 326
 327                 if (!ready) fepriv->auto_sub_step++;
 328         }
 329
 330         /* if this attempt would hit where we started, indicate a complete
 331          * iteration has occurred */
 332         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 333             (fepriv->auto_sub_step == 0) && check_wrapped) {
 334                 return 1;
 335         }
 336
 337         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 338                 "auto_sub_step:%i started_auto_step:%i\n",
 339                 __func__, fepriv->lnb_drift, fepriv->inversion,
 340                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 341
 342         /* set the frontend itself */
 343         fepriv->parameters.frequency += fepriv->lnb_drift;
 344         if (autoinversion)
 345                 fepriv->parameters.inversion = fepriv->inversion;
 346         if (fe->ops.set_frontend)
 347                 fe->ops.set_frontend(fe, &fepriv->parameters);
 348
 349         fepriv->parameters.frequency = original_frequency;
 350         fepriv->parameters.inversion = original_inversion;
 351
 352         fepriv->auto_sub_step++;
 353         return 0;
 354 }
 355
 356 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 357 {
 358         fe_status_t s = 0;
 359         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 360
 361         /* if we've got no parameters, just keep idling */
 362         if (fepriv->state & FESTATE_IDLE) {
 363                 fepriv->delay = 3*HZ;
 364                 fepriv->quality = 0;
 365                 return;
 366         }
 367
 368         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 369         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 370                 if (fepriv->state & FESTATE_RETUNE) {
 371                         if (fe->ops.set_frontend)
 372                                 fe->ops.set_frontend(fe, &fepriv->parameters);
 373                         fepriv->state = FESTATE_TUNED;
 374                 }
 375                 fepriv->delay = 3*HZ;
 376                 fepriv->quality = 0;
 377                 return;
 378         }
 379
 380         /* get the frontend status */
 381         if (fepriv->state & FESTATE_RETUNE) {
 382                 s = 0;
 383         } else {
 384                 if (fe->ops.read_status)
 385                         fe->ops.read_status(fe, &s);
 386                 if (s != fepriv->status) {
 387                         dvb_frontend_add_event(fe, s);
 388                         fepriv->status = s;
 389                 }
 390         }
 391
 392         /* if we're not tuned, and we have a lock, move to the TUNED state */
 393         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 394                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 395                 fepriv->state = FESTATE_TUNED;
 396
 397                 /* if we're tuned, then we have determined the correct inversion */
 398                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 399                     (fepriv->parameters.inversion == INVERSION_AUTO)) {
 400                         fepriv->parameters.inversion = fepriv->inversion;
 401                 }
 402                 return;
 403         }
 404
 405         /* if we are tuned already, check we're still locked */
 406         if (fepriv->state & FESTATE_TUNED) {
 407                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 408
 409                 /* we're tuned, and the lock is still good... */
 410                 if (s & FE_HAS_LOCK) {
 411                         return;
 412                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 413                         fepriv->state = FESTATE_ZIGZAG_FAST;
 414                         fepriv->started_auto_step = fepriv->auto_step;
 415                         fepriv->check_wrapped = 0;
 416                 }
 417         }
 418
 419         /* don't actually do anything if we're in the LOSTLOCK state,
 420          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 421         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 422             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 423                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 424                 return;
 425         }
 426
 427         /* don't do anything if we're in the DISEQC state, since this
 428          * might be someone with a motorized dish controlled by DISEQC.
 429          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 430         if (fepriv->state & FESTATE_DISEQC) {
 431                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 432                 return;
 433         }
 434
 435         /* if we're in the RETUNE state, set everything up for a brand
 436          * new scan, keeping the current inversion setting, as the next
 437          * tune is _very_ likely to require the same */
 438         if (fepriv->state & FESTATE_RETUNE) {
 439                 fepriv->lnb_drift = 0;
 440                 fepriv->auto_step = 0;
 441                 fepriv->auto_sub_step = 0;
 442                 fepriv->started_auto_step = 0;
 443                 fepriv->check_wrapped = 0;
 444         }
 445
 446         /* fast zigzag. */
 447         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 448                 fepriv->delay = fepriv->min_delay;
 449
 450                 /* peform a tune */
 451                 if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) {
 452                         /* OK, if we've run out of trials at the fast speed.
 453                          * Drop back to slow for the _next_ attempt */
 454                         fepriv->state = FESTATE_SEARCHING_SLOW;
 455                         fepriv->started_auto_step = fepriv->auto_step;
 456                         return;
 457                 }
 458                 fepriv->check_wrapped = 1;
 459
 460                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 461                  * This ensures we cannot return from an
 462                  * FE_SET_FRONTEND ioctl before the first frontend tune
 463                  * occurs */
 464                 if (fepriv->state & FESTATE_RETUNE) {
 465                         fepriv->state = FESTATE_TUNING_FAST;
 466                 }
 467         }
 468
 469         /* slow zigzag */
 470         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 471                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 472
 473                 /* Note: don't bother checking for wrapping; we stay in this
 474                  * state until we get a lock */
 475                 dvb_frontend_swzigzag_autotune(fe, 0);
 476         }
 477 }
 478
 479 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 480 {
 481         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 482
 483         if (fepriv->exit)
 484                 return 1;
 485
 486         if (fepriv->dvbdev->writers == 1)
 487                 if (time_after(jiffies, fepriv->release_jiffies +
 488                                   dvb_shutdown_timeout * HZ))
 489                         return 1;
 490
 491         return 0;
 492 }
 493
 494 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 495 {
 496         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 497
 498         if (fepriv->wakeup) {
 499                 fepriv->wakeup = 0;
 500                 return 1;
 501         }
 502         return dvb_frontend_is_exiting(fe);
 503 }
 504
 505 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 506 {
 507         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 508
 509         fepriv->wakeup = 1;
 510         wake_up_interruptible(&fepriv->wait_queue);
 511 }
 512
 513 static int dvb_frontend_thread(void *data)
 514 {
 515         struct dvb_frontend *fe = data;
 516         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 517         unsigned long timeout;
 518         fe_status_t s;
 519         struct dvb_frontend_parameters *params;
 520
 521         dprintk("%s\n", __func__);
 522
 523         fepriv->check_wrapped = 0;
 524         fepriv->quality = 0;
 525         fepriv->delay = 3*HZ;
 526         fepriv->status = 0;
 527         fepriv->wakeup = 0;
 528         fepriv->reinitialise = 0;
 529
 530         dvb_frontend_init(fe);
 531
 532         set_freezable();
 533         while (1) {
 534                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 535 restart:
 536                 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
 537                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 538                                 || freezing(current),
 539                         fepriv->delay);
 540
 541                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 542                         /* got signal or quitting */
 543                         break;
 544                 }
 545
 546                 if (try_to_freeze())
 547                         goto restart;
 548
 549                 if (down_interruptible(&fepriv->sem))
 550                         break;
 551
 552                 if (fepriv->reinitialise) {
 553                         dvb_frontend_init(fe);
 554                         if (fepriv->tone != -1) {
 555                                 fe->ops.set_tone(fe, fepriv->tone);
 556                         }
 557                         if (fepriv->voltage != -1) {
 558                                 fe->ops.set_voltage(fe, fepriv->voltage);
 559                         }
 560                         fepriv->reinitialise = 0;
 561                 }
 562
 563                 /* do an iteration of the tuning loop */
 564                 if (fe->ops.get_frontend_algo) {
 565                         if (fe->ops.get_frontend_algo(fe) == FE_ALGO_HW) {
 566                                 /* have we been asked to retune? */
 567                                 params = NULL;
 568                                 if (fepriv->state & FESTATE_RETUNE) {
 569                                         params = &fepriv->parameters;
 570                                         fepriv->state = FESTATE_TUNED;
 571                                 }
 572
 573                                 fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
 574                                 if (s != fepriv->status) {
 575                                         dvb_frontend_add_event(fe, s);
 576                                         fepriv->status = s;
 577                                 }
 578                         } else
 579                                 dvb_frontend_swzigzag(fe);
 580                 } else
 581                         dvb_frontend_swzigzag(fe);
 582         }
 583
 584         if (dvb_powerdown_on_sleep) {
 585                 if (fe->ops.set_voltage)
 586                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 587                 if (fe->ops.tuner_ops.sleep) {
 588                         if (fe->ops.i2c_gate_ctrl)
 589                                 fe->ops.i2c_gate_ctrl(fe, 1);
 590                         fe->ops.tuner_ops.sleep(fe);
 591                         if (fe->ops.i2c_gate_ctrl)
 592                                 fe->ops.i2c_gate_ctrl(fe, 0);
 593                 }
 594                 if (fe->ops.sleep)
 595                         fe->ops.sleep(fe);
 596         }
 597
 598         fepriv->thread = NULL;
 599         mb();
 600
 601         dvb_frontend_wakeup(fe);
 602         return 0;
 603 }
 604
 605 static void dvb_frontend_stop(struct dvb_frontend *fe)
 606 {
 607         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 608
 609         dprintk ("%s\n", __func__);
 610
 611         fepriv->exit = 1;
 612         mb();
 613
 614         if (!fepriv->thread)
 615                 return;
 616
 617         kthread_stop(fepriv->thread);
 618
 619         init_MUTEX (&fepriv->sem);
 620         fepriv->state = FESTATE_IDLE;
 621
 622         /* paranoia check in case a signal arrived */
 623         if (fepriv->thread)
 624                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 625                                 fepriv->thread);
 626 }
 627
 628 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 629 {
 630         return ((curtime.tv_usec < lasttime.tv_usec) ?
 631                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 632                 curtime.tv_usec - lasttime.tv_usec);
 633 }
 634 EXPORT_SYMBOL(timeval_usec_diff);
 635
 636 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 637 {
 638         curtime->tv_usec += add_usec;
 639         if (curtime->tv_usec >= 1000000) {
 640                 curtime->tv_usec -= 1000000;
 641                 curtime->tv_sec++;
 642         }
 643 }
 644
 645 /*
 646  * Sleep until gettimeofday() > waketime + add_usec
 647  * This needs to be as precise as possible, but as the delay is
 648  * usually between 2ms and 32ms, it is done using a scheduled msleep
 649  * followed by usleep (normally a busy-wait loop) for the remainder
 650  */
 651 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 652 {
 653         struct timeval lasttime;
 654         s32 delta, newdelta;
 655
 656         timeval_usec_add(waketime, add_usec);
 657
 658         do_gettimeofday(&lasttime);
 659         delta = timeval_usec_diff(lasttime, *waketime);
 660         if (delta > 2500) {
 661                 msleep((delta - 1500) / 1000);
 662                 do_gettimeofday(&lasttime);
 663                 newdelta = timeval_usec_diff(lasttime, *waketime);
 664                 delta = (newdelta > delta) ? 0 : newdelta;
 665         }
 666         if (delta > 0)
 667                 udelay(delta);
 668 }
 669 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 670
 671 static int dvb_frontend_start(struct dvb_frontend *fe)
 672 {
 673         int ret;
 674         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 675         struct task_struct *fe_thread;
 676
 677         dprintk ("%s\n", __func__);
 678
 679         if (fepriv->thread) {
 680                 if (!fepriv->exit)
 681                         return 0;
 682                 else
 683                         dvb_frontend_stop (fe);
 684         }
 685
 686         if (signal_pending(current))
 687                 return -EINTR;
 688         if (down_interruptible (&fepriv->sem))
 689                 return -EINTR;
 690
 691         fepriv->state = FESTATE_IDLE;
 692         fepriv->exit = 0;
 693         fepriv->thread = NULL;
 694         mb();
 695
 696         fe_thread = kthread_run(dvb_frontend_thread, fe,
 697                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 698         if (IS_ERR(fe_thread)) {
 699                 ret = PTR_ERR(fe_thread);
 700                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 701                 up(&fepriv->sem);
 702                 return ret;
 703         }
 704         fepriv->thread = fe_thread;
 705         return 0;
 706 }
 707
 708 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
 709                                         u32 *freq_min, u32 *freq_max)
 710 {
 711         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 712
 713         if (fe->ops.info.frequency_max == 0)
 714                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 715         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 716                 *freq_max = fe->ops.info.frequency_max;
 717         else
 718                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 719
 720         if (*freq_min == 0 || *freq_max == 0)
 721                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 722                        fe->dvb->num,fe->id);
 723 }
 724
 725 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 726                                 struct dvb_frontend_parameters *parms)
 727 {
 728         u32 freq_min;
 729         u32 freq_max;
 730
 731         /* range check: frequency */
 732         dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
 733         if ((freq_min && parms->frequency < freq_min) ||
 734             (freq_max && parms->frequency > freq_max)) {
 735                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 736                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 737                 return -EINVAL;
 738         }
 739
 740         /* range check: symbol rate */
 741         if (fe->ops.info.type == FE_QPSK) {
 742                 if ((fe->ops.info.symbol_rate_min &&
 743                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 744                     (fe->ops.info.symbol_rate_max &&
 745                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 746                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 747                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 748                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 749                         return -EINVAL;
 750                 }
 751
 752         } else if (fe->ops.info.type == FE_QAM) {
 753                 if ((fe->ops.info.symbol_rate_min &&
 754                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 755                     (fe->ops.info.symbol_rate_max &&
 756                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 757                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 758                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 759                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 760                         return -EINVAL;
 761                 }
 762         }
 763
 764         return 0;
 765 }
 766
 767 struct dtv_cmds_h dtv_cmds[] = {
 768         [DTV_TUNE] = {
 769                 .name   = "DTV_TUNE",
 770                 .cmd    = DTV_TUNE,
 771                 .set    = 1,
 772         },
 773         [DTV_CLEAR] = {
 774                 .name   = "DTV_CLEAR",
 775                 .cmd    = DTV_CLEAR,
 776                 .set    = 1,
 777         },
 778
 779         /* Set */
 780         [DTV_FREQUENCY] = {
 781                 .name   = "DTV_FREQUENCY",
 782                 .cmd    = DTV_FREQUENCY,
 783                 .set    = 1,
 784         },
 785         [DTV_BANDWIDTH_HZ] = {
 786                 .name   = "DTV_BANDWIDTH_HZ",
 787                 .cmd    = DTV_BANDWIDTH_HZ,
 788                 .set    = 1,
 789         },
 790         [DTV_MODULATION] = {
 791                 .name   = "DTV_MODULATION",
 792                 .cmd    = DTV_MODULATION,
 793                 .set    = 1,
 794         },
 795         [DTV_INVERSION] = {
 796                 .name   = "DTV_INVERSION",
 797                 .cmd    = DTV_INVERSION,
 798                 .set    = 1,
 799         },
 800         [DTV_DISEQC_MASTER] = {
 801                 .name   = "DTV_DISEQC_MASTER",
 802                 .cmd    = DTV_DISEQC_MASTER,
 803                 .set    = 1,
 804                 .buffer = 1,
 805         },
 806         [DTV_SYMBOL_RATE] = {
 807                 .name   = "DTV_SYMBOL_RATE",
 808                 .cmd    = DTV_SYMBOL_RATE,
 809                 .set    = 1,
 810         },
 811         [DTV_INNER_FEC] = {
 812                 .name   = "DTV_INNER_FEC",
 813                 .cmd    = DTV_INNER_FEC,
 814                 .set    = 1,
 815         },
 816         [DTV_VOLTAGE] = {
 817                 .name   = "DTV_VOLTAGE",
 818                 .cmd    = DTV_VOLTAGE,
 819                 .set    = 1,
 820         },
 821         [DTV_TONE] = {
 822                 .name   = "DTV_TONE",
 823                 .cmd    = DTV_TONE,
 824                 .set    = 1,
 825         },
 826         [DTV_PILOT] = {
 827                 .name   = "DTV_PILOT",
 828                 .cmd    = DTV_PILOT,
 829                 .set    = 1,
 830         },
 831         [DTV_ROLLOFF] = {
 832                 .name   = "DTV_ROLLOFF",
 833                 .cmd    = DTV_ROLLOFF,
 834                 .set    = 1,
 835         },
 836         [DTV_DELIVERY_SYSTEM] = {
 837                 .name   = "DTV_DELIVERY_SYSTEM",
 838                 .cmd    = DTV_DELIVERY_SYSTEM,
 839                 .set    = 1,
 840         },
 841         [DTV_HIERARCHY] = {
 842                 .name   = "DTV_HIERARCHY",
 843                 .cmd    = DTV_HIERARCHY,
 844                 .set    = 1,
 845         },
 846         [DTV_CODE_RATE_HP] = {
 847                 .name   = "DTV_CODE_RATE_HP",
 848                 .cmd    = DTV_CODE_RATE_HP,
 849                 .set    = 1,
 850         },
 851         [DTV_CODE_RATE_LP] = {
 852                 .name   = "DTV_CODE_RATE_LP",
 853                 .cmd    = DTV_CODE_RATE_LP,
 854                 .set    = 1,
 855         },
 856         [DTV_GUARD_INTERVAL] = {
 857                 .name   = "DTV_GUARD_INTERVAL",
 858                 .cmd    = DTV_GUARD_INTERVAL,
 859                 .set    = 1,
 860         },
 861         [DTV_TRANSMISSION_MODE] = {
 862                 .name   = "DTV_TRANSMISSION_MODE",
 863                 .cmd    = DTV_TRANSMISSION_MODE,
 864                 .set    = 1,
 865         },
 866         /* Get */
 867         [DTV_DISEQC_SLAVE_REPLY] = {
 868                 .name   = "DTV_DISEQC_SLAVE_REPLY",
 869                 .cmd    = DTV_DISEQC_SLAVE_REPLY,
 870                 .set    = 0,
 871                 .buffer = 1,
 872         },
 873         [DTV_API_VERSION] = {
 874                 .name   = "DTV_API_VERSION",
 875                 .cmd    = DTV_API_VERSION,
 876                 .set    = 0,
 877         },
 878         [DTV_CODE_RATE_HP] = {
 879                 .name   = "DTV_CODE_RATE_HP",
 880                 .cmd    = DTV_CODE_RATE_HP,
 881                 .set    = 0,
 882         },
 883         [DTV_CODE_RATE_LP] = {
 884                 .name   = "DTV_CODE_RATE_LP",
 885                 .cmd    = DTV_CODE_RATE_LP,
 886                 .set    = 0,
 887         },
 888         [DTV_GUARD_INTERVAL] = {
 889                 .name   = "DTV_GUARD_INTERVAL",
 890                 .cmd    = DTV_GUARD_INTERVAL,
 891                 .set    = 0,
 892         },
 893         [DTV_TRANSMISSION_MODE] = {
 894                 .name   = "DTV_TRANSMISSION_MODE",
 895                 .cmd    = DTV_TRANSMISSION_MODE,
 896                 .set    = 0,
 897         },
 898         [DTV_HIERARCHY] = {
 899                 .name   = "DTV_HIERARCHY",
 900                 .cmd    = DTV_HIERARCHY,
 901                 .set    = 0,
 902         },
 903 };
 904
 905 void dtv_property_dump(struct dtv_property *tvp)
 906 {
 907         int i;
 908
 909         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 910                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 911                         __func__, tvp->cmd);
 912                 return;
 913         }
 914
 915         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 916                 ,__func__
 917                 ,tvp->cmd
 918                 ,dtv_cmds[ tvp->cmd ].name);
 919
 920         if(dtv_cmds[ tvp->cmd ].buffer) {
 921
 922                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 923                         ,__func__
 924                         ,tvp->u.buffer.len);
 925
 926                 for(i = 0; i < tvp->u.buffer.len; i++)
 927                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
 928                                 ,__func__
 929                                 ,i
 930                                 ,tvp->u.buffer.data[i]);
 931
 932         } else
 933                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
 934 }
 935
 936 int is_legacy_delivery_system(fe_delivery_system_t s)
 937 {
 938         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
 939            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
 940            (s == SYS_ATSC))
 941                 return 1;
 942
 943         return 0;
 944 }
 945
 946 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
 947  * drivers can use a single set_frontend tuning function, regardless of whether
 948  * it's being used for the legacy or new API, reducing code and complexity.
 949  */
 950 void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
 951 {
 952         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 953
 954         c->frequency = p->frequency;
 955         c->inversion = p->inversion;
 956
 957         switch (fe->ops.info.type) {
 958         case FE_QPSK:
 959                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 960                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 961                 c->symbol_rate = p->u.qpsk.symbol_rate;
 962                 c->fec_inner = p->u.qpsk.fec_inner;
 963                 c->delivery_system = SYS_DVBS;
 964                 break;
 965         case FE_QAM:
 966                 c->symbol_rate = p->u.qam.symbol_rate;
 967                 c->fec_inner = p->u.qam.fec_inner;
 968                 c->modulation = p->u.qam.modulation;
 969                 c->delivery_system = SYS_DVBC_ANNEX_AC;
 970                 break;
 971         case FE_OFDM:
 972                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
 973                         c->bandwidth_hz = 6000000;
 974                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
 975                         c->bandwidth_hz = 7000000;
 976                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
 977                         c->bandwidth_hz = 8000000;
 978                 else
 979                         /* Including BANDWIDTH_AUTO */
 980                         c->bandwidth_hz = 0;
 981                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
 982                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
 983                 c->modulation = p->u.ofdm.constellation;
 984                 c->transmission_mode = p->u.ofdm.transmission_mode;
 985                 c->guard_interval = p->u.ofdm.guard_interval;
 986                 c->hierarchy = p->u.ofdm.hierarchy_information;
 987                 c->delivery_system = SYS_DVBT;
 988                 break;
 989         case FE_ATSC:
 990                 c->modulation = p->u.vsb.modulation;
 991                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
 992                         c->delivery_system = SYS_ATSC;
 993                 else
 994                         c->delivery_system = SYS_DVBC_ANNEX_B;
 995                 break;
 996         }
 997 }
 998
 999 /* Ensure the cached values are set correctly in the frontend
1000  * legacy tuning structures, for the advanced tuning API.
1001  */
1002 void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1003 {
1004         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1005         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1006         struct dvb_frontend_parameters *p = &fepriv->parameters;
1007
1008         p->frequency = c->frequency;
1009         p->inversion = c->inversion;
1010
1011         switch (fe->ops.info.type) {
1012         case FE_QPSK:
1013                 dprintk("%s() Preparing QPSK req\n", __func__);
1014                 p->u.qpsk.symbol_rate = c->symbol_rate;
1015                 p->u.qpsk.fec_inner = c->fec_inner;
1016                 c->delivery_system = SYS_DVBS;
1017                 break;
1018         case FE_QAM:
1019                 dprintk("%s() Preparing QAM req\n", __func__);
1020                 p->u.qam.symbol_rate = c->symbol_rate;
1021                 p->u.qam.fec_inner = c->fec_inner;
1022                 p->u.qam.modulation = c->modulation;
1023                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1024                 break;
1025         case FE_OFDM:
1026                 dprintk("%s() Preparing OFDM req\n", __func__);
1027                 if (c->bandwidth_hz == 6000000)
1028                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1029                 else if (c->bandwidth_hz == 7000000)
1030                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1031                 else if (c->bandwidth_hz == 8000000)
1032                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1033                 else
1034                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1035                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1036                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1037                 p->u.ofdm.constellation = c->modulation;
1038                 p->u.ofdm.transmission_mode = c->transmission_mode;
1039                 p->u.ofdm.guard_interval = c->guard_interval;
1040                 p->u.ofdm.hierarchy_information = c->hierarchy;
1041                 c->delivery_system = SYS_DVBT;
1042                 break;
1043         case FE_ATSC:
1044                 dprintk("%s() Preparing VSB req\n", __func__);
1045                 p->u.vsb.modulation = c->modulation;
1046                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1047                         c->delivery_system = SYS_ATSC;
1048                 else
1049                         c->delivery_system = SYS_DVBC_ANNEX_B;
1050                 break;
1051         }
1052 }
1053
1054 /* Ensure the cached values are set correctly in the frontend
1055  * legacy tuning structures, for the legacy tuning API.
1056  */
1057 void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1058 {
1059         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1060         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1061         struct dvb_frontend_parameters *p = &fepriv->parameters;
1062
1063         p->frequency = c->frequency;
1064         p->inversion = c->inversion;
1065
1066         switch(c->modulation) {
1067         case PSK_8:
1068         case APSK_16:
1069         case APSK_32:
1070         case QPSK:
1071                 p->u.qpsk.symbol_rate = c->symbol_rate;
1072                 p->u.qpsk.fec_inner = c->fec_inner;
1073                 break;
1074         default:
1075                 break;
1076         }
1077
1078         if(c->delivery_system == SYS_ISDBT) {
1079                 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1080                 p->frequency = c->frequency;
1081                 p->inversion = INVERSION_AUTO;
1082                 p->u.ofdm.constellation = QAM_AUTO;
1083                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1084                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1085                 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1086                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1087                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1088                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1089         }
1090 }
1091
1092 void dtv_property_cache_submit(struct dvb_frontend *fe)
1093 {
1094         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1095
1096         /* For legacy delivery systems we don't need the delivery_system to
1097          * be specified, but we populate the older structures from the cache
1098          * so we can call set_frontend on older drivers.
1099          */
1100         if(is_legacy_delivery_system(c->delivery_system)) {
1101
1102                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1103                 dtv_property_legacy_params_sync(fe);
1104
1105         } else {
1106                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1107
1108                 /* For advanced delivery systems / modulation types ...
1109                  * we seed the lecacy dvb_frontend_parameters structure
1110                  * so that the sanity checking code later in the IOCTL processing
1111                  * can validate our basic frequency ranges, symbolrates, modulation
1112                  * etc.
1113                  */
1114                 dtv_property_adv_params_sync(fe);
1115         }
1116 }
1117
1118 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1119                         unsigned int cmd, void *parg);
1120 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1121                         unsigned int cmd, void *parg);
1122
1123 int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp,
1124         struct inode *inode, struct file *file)
1125 {
1126         int r = 0;
1127
1128         dtv_property_dump(tvp);
1129
1130         /* Allow the frontend to validate incoming properties */
1131         if (fe->ops.get_property)
1132                 r = fe->ops.get_property(fe, tvp);
1133
1134         if (r < 0)
1135                 return r;
1136
1137         switch(tvp->cmd) {
1138         case DTV_FREQUENCY:
1139                 tvp->u.data = fe->dtv_property_cache.frequency;
1140                 break;
1141         case DTV_MODULATION:
1142                 tvp->u.data = fe->dtv_property_cache.modulation;
1143                 break;
1144         case DTV_BANDWIDTH_HZ:
1145                 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1146                 break;
1147         case DTV_INVERSION:
1148                 tvp->u.data = fe->dtv_property_cache.inversion;
1149                 break;
1150         case DTV_SYMBOL_RATE:
1151                 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1152                 break;
1153         case DTV_INNER_FEC:
1154                 tvp->u.data = fe->dtv_property_cache.fec_inner;
1155                 break;
1156         case DTV_PILOT:
1157                 tvp->u.data = fe->dtv_property_cache.pilot;
1158                 break;
1159         case DTV_ROLLOFF:
1160                 tvp->u.data = fe->dtv_property_cache.rolloff;
1161                 break;
1162         case DTV_DELIVERY_SYSTEM:
1163                 tvp->u.data = fe->dtv_property_cache.delivery_system;
1164                 break;
1165         case DTV_VOLTAGE:
1166                 tvp->u.data = fe->dtv_property_cache.voltage;
1167                 break;
1168         case DTV_TONE:
1169                 tvp->u.data = fe->dtv_property_cache.sectone;
1170                 break;
1171         case DTV_API_VERSION:
1172                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1173                 break;
1174         case DTV_CODE_RATE_HP:
1175                 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1176                 break;
1177         case DTV_CODE_RATE_LP:
1178                 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1179                 break;
1180         case DTV_GUARD_INTERVAL:
1181                 tvp->u.data = fe->dtv_property_cache.guard_interval;
1182                 break;
1183         case DTV_TRANSMISSION_MODE:
1184                 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1185                 break;
1186         case DTV_HIERARCHY:
1187                 tvp->u.data = fe->dtv_property_cache.hierarchy;
1188                 break;
1189         default:
1190                 r = -1;
1191         }
1192
1193         return r;
1194 }
1195
1196 int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp,
1197         struct inode *inode, struct file *file)
1198 {
1199         int r = 0;
1200         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1201         dtv_property_dump(tvp);
1202
1203         /* Allow the frontend to validate incoming properties */
1204         if (fe->ops.set_property)
1205                 r = fe->ops.set_property(fe, tvp);
1206
1207         if (r < 0)
1208                 return r;
1209
1210         switch(tvp->cmd) {
1211         case DTV_CLEAR:
1212                 /* Reset a cache of data specific to the frontend here. This does
1213                  * not effect hardware.
1214                  */
1215                 dprintk("%s() Flushing property cache\n", __func__);
1216                 memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1217                 fe->dtv_property_cache.state = tvp->cmd;
1218                 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1219                 break;
1220         case DTV_TUNE:
1221                 /* interpret the cache of data, build either a traditional frontend
1222                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1223                  * ioctl.
1224                  */
1225                 fe->dtv_property_cache.state = tvp->cmd;
1226                 dprintk("%s() Finalised property cache\n", __func__);
1227                 dtv_property_cache_submit(fe);
1228
1229                 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1230                         &fepriv->parameters);
1231                 break;
1232         case DTV_FREQUENCY:
1233                 fe->dtv_property_cache.frequency = tvp->u.data;
1234                 break;
1235         case DTV_MODULATION:
1236                 fe->dtv_property_cache.modulation = tvp->u.data;
1237                 break;
1238         case DTV_BANDWIDTH_HZ:
1239                 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1240                 break;
1241         case DTV_INVERSION:
1242                 fe->dtv_property_cache.inversion = tvp->u.data;
1243                 break;
1244         case DTV_SYMBOL_RATE:
1245                 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1246                 break;
1247         case DTV_INNER_FEC:
1248                 fe->dtv_property_cache.fec_inner = tvp->u.data;
1249                 break;
1250         case DTV_PILOT:
1251                 fe->dtv_property_cache.pilot = tvp->u.data;
1252                 break;
1253         case DTV_ROLLOFF:
1254                 fe->dtv_property_cache.rolloff = tvp->u.data;
1255                 break;
1256         case DTV_DELIVERY_SYSTEM:
1257                 fe->dtv_property_cache.delivery_system = tvp->u.data;
1258                 break;
1259         case DTV_VOLTAGE:
1260                 fe->dtv_property_cache.voltage = tvp->u.data;
1261                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1262                         (void *)fe->dtv_property_cache.voltage);
1263                 break;
1264         case DTV_TONE:
1265                 fe->dtv_property_cache.sectone = tvp->u.data;
1266                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1267                         (void *)fe->dtv_property_cache.sectone);
1268                 break;
1269         case DTV_CODE_RATE_HP:
1270                 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1271                 break;
1272         case DTV_CODE_RATE_LP:
1273                 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1274                 break;
1275         case DTV_GUARD_INTERVAL:
1276                 fe->dtv_property_cache.guard_interval = tvp->u.data;
1277                 break;
1278         case DTV_TRANSMISSION_MODE:
1279                 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1280                 break;
1281         case DTV_HIERARCHY:
1282                 fe->dtv_property_cache.hierarchy = tvp->u.data;
1283                 break;
1284         default:
1285                 r = -1;
1286         }
1287
1288         return r;
1289 }
1290
1291 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1292                         unsigned int cmd, void *parg)
1293 {
1294         struct dvb_device *dvbdev = file->private_data;
1295         struct dvb_frontend *fe = dvbdev->priv;
1296         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1297         int err = -EOPNOTSUPP;
1298
1299         dprintk ("%s\n", __func__);
1300
1301         if (fepriv->exit)
1302                 return -ENODEV;
1303
1304         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1305             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1306              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1307                 return -EPERM;
1308
1309         if (down_interruptible (&fepriv->sem))
1310                 return -ERESTARTSYS;
1311
1312         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1313                 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1314         else {
1315                 fe->dtv_property_cache.state = DTV_UNDEFINED;
1316                 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1317         }
1318
1319         up(&fepriv->sem);
1320         return err;
1321 }
1322
1323 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1324                         unsigned int cmd, void *parg)
1325 {
1326         struct dvb_device *dvbdev = file->private_data;
1327         struct dvb_frontend *fe = dvbdev->priv;
1328         int err = 0;
1329
1330         struct dtv_properties *tvps = NULL;
1331         struct dtv_property *tvp = NULL;
1332         int i;
1333
1334         dprintk("%s\n", __func__);
1335
1336         if(cmd == FE_SET_PROPERTY) {
1337                 tvps = (struct dtv_properties __user *)parg;
1338
1339                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1340                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1341
1342                 /* Put an arbitrary limit on the number of messages that can
1343                  * be sent at once */
1344                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1345                         return -EINVAL;
1346
1347                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1348                         sizeof(struct dtv_property), GFP_KERNEL);
1349                 if (!tvp) {
1350                         err = -ENOMEM;
1351                         goto out;
1352                 }
1353
1354                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1355                         err = -EFAULT;
1356                         goto out;
1357                 }
1358
1359                 for (i = 0; i < tvps->num; i++) {
1360                         (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1361                         err |= (tvp + i)->result;
1362                 }
1363
1364                 if(fe->dtv_property_cache.state == DTV_TUNE)
1365                         dprintk("%s() Property cache is full, tuning\n", __func__);
1366
1367         } else
1368         if(cmd == FE_GET_PROPERTY) {
1369
1370                 tvps = (struct dtv_properties __user *)parg;
1371
1372                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1373                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1374
1375                 /* Put an arbitrary limit on the number of messages that can
1376                  * be sent at once */
1377                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1378                         return -EINVAL;
1379
1380                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1381                         sizeof(struct dtv_property), GFP_KERNEL);
1382                 if (!tvp) {
1383                         err = -ENOMEM;
1384                         goto out;
1385                 }
1386
1387                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1388                         err = -EFAULT;
1389                         goto out;
1390                 }
1391
1392                 for (i = 0; i < tvps->num; i++) {
1393                         (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1394                         err |= (tvp + i)->result;
1395                 }
1396
1397                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1398                         err = -EFAULT;
1399                         goto out;
1400                 }
1401
1402         } else
1403                 err = -EOPNOTSUPP;
1404
1405 out:
1406         kfree(tvp);
1407         return err;
1408 }
1409
1410 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1411                         unsigned int cmd, void *parg)
1412 {
1413         struct dvb_device *dvbdev = file->private_data;
1414         struct dvb_frontend *fe = dvbdev->priv;
1415         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1416         int err = -EOPNOTSUPP;
1417
1418         switch (cmd) {
1419         case FE_GET_INFO: {
1420                 struct dvb_frontend_info* info = parg;
1421                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1422                 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1423
1424                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1425                  * do it, it is done for it. */
1426                 info->caps |= FE_CAN_INVERSION_AUTO;
1427                 err = 0;
1428                 break;
1429         }
1430
1431         case FE_READ_STATUS: {
1432                 fe_status_t* status = parg;
1433
1434                 /* if retune was requested but hasn't occured yet, prevent
1435                  * that user get signal state from previous tuning */
1436                 if(fepriv->state == FESTATE_RETUNE) {
1437                         err=0;
1438                         *status = 0;
1439                         break;
1440                 }
1441
1442                 if (fe->ops.read_status)
1443                         err = fe->ops.read_status(fe, status);
1444                 break;
1445         }
1446         case FE_READ_BER:
1447                 if (fe->ops.read_ber)
1448                         err = fe->ops.read_ber(fe, (__u32*) parg);
1449                 break;
1450
1451         case FE_READ_SIGNAL_STRENGTH:
1452                 if (fe->ops.read_signal_strength)
1453                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1454                 break;
1455
1456         case FE_READ_SNR:
1457                 if (fe->ops.read_snr)
1458                         err = fe->ops.read_snr(fe, (__u16*) parg);
1459                 break;
1460
1461         case FE_READ_UNCORRECTED_BLOCKS:
1462                 if (fe->ops.read_ucblocks)
1463                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1464                 break;
1465
1466
1467         case FE_DISEQC_RESET_OVERLOAD:
1468                 if (fe->ops.diseqc_reset_overload) {
1469                         err = fe->ops.diseqc_reset_overload(fe);
1470                         fepriv->state = FESTATE_DISEQC;
1471                         fepriv->status = 0;
1472                 }
1473                 break;
1474
1475         case FE_DISEQC_SEND_MASTER_CMD:
1476                 if (fe->ops.diseqc_send_master_cmd) {
1477                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1478                         fepriv->state = FESTATE_DISEQC;
1479                         fepriv->status = 0;
1480                 }
1481                 break;
1482
1483         case FE_DISEQC_SEND_BURST:
1484                 if (fe->ops.diseqc_send_burst) {
1485                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1486                         fepriv->state = FESTATE_DISEQC;
1487                         fepriv->status = 0;
1488                 }
1489                 break;
1490
1491         case FE_SET_TONE:
1492                 if (fe->ops.set_tone) {
1493                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1494                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1495                         fepriv->state = FESTATE_DISEQC;
1496                         fepriv->status = 0;
1497                 }
1498                 break;
1499
1500         case FE_SET_VOLTAGE:
1501                 if (fe->ops.set_voltage) {
1502                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1503                         fepriv->voltage = (fe_sec_voltage_t) parg;
1504                         fepriv->state = FESTATE_DISEQC;
1505                         fepriv->status = 0;
1506                 }
1507                 break;
1508
1509         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1510                 if (fe->ops.dishnetwork_send_legacy_command) {
1511                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1512                         fepriv->state = FESTATE_DISEQC;
1513                         fepriv->status = 0;
1514                 } else if (fe->ops.set_voltage) {
1515                         /*
1516                          * NOTE: This is a fallback condition.  Some frontends
1517                          * (stv0299 for instance) take longer than 8msec to
1518                          * respond to a set_voltage command.  Those switches
1519                          * need custom routines to switch properly.  For all
1520                          * other frontends, the following shoule work ok.
1521                          * Dish network legacy switches (as used by Dish500)
1522                          * are controlled by sending 9-bit command words
1523                          * spaced 8msec apart.
1524                          * the actual command word is switch/port dependant
1525                          * so it is up to the userspace application to send
1526                          * the right command.
1527                          * The command must always start with a '0' after
1528                          * initialization, so parg is 8 bits and does not
1529                          * include the initialization or start bit
1530                          */
1531                         unsigned long swcmd = ((unsigned long) parg) << 1;
1532                         struct timeval nexttime;
1533                         struct timeval tv[10];
1534                         int i;
1535                         u8 last = 1;
1536                         if (dvb_frontend_debug)
1537                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1538                         do_gettimeofday(&nexttime);
1539                         if (dvb_frontend_debug)
1540                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1541                         /* before sending a command, initialize by sending
1542                          * a 32ms 18V to the switch
1543                          */
1544                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1545                         dvb_frontend_sleep_until(&nexttime, 32000);
1546
1547                         for (i = 0; i < 9; i++) {
1548                                 if (dvb_frontend_debug)
1549                                         do_gettimeofday(&tv[i + 1]);
1550                                 if ((swcmd & 0x01) != last) {
1551                                         /* set voltage to (last ? 13V : 18V) */
1552                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1553                                         last = (last) ? 0 : 1;
1554                                 }
1555                                 swcmd = swcmd >> 1;
1556                                 if (i != 8)
1557                                         dvb_frontend_sleep_until(&nexttime, 8000);
1558                         }
1559                         if (dvb_frontend_debug) {
1560                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1561                                         __func__, fe->dvb->num);
1562                                 for (i = 1; i < 10; i++)
1563                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1564                         }
1565                         err = 0;
1566                         fepriv->state = FESTATE_DISEQC;
1567                         fepriv->status = 0;
1568                 }
1569                 break;
1570
1571         case FE_DISEQC_RECV_SLAVE_REPLY:
1572                 if (fe->ops.diseqc_recv_slave_reply)
1573                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1574                 break;
1575
1576         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1577                 if (fe->ops.enable_high_lnb_voltage)
1578                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1579                 break;
1580
1581         case FE_SET_FRONTEND: {
1582                 struct dvb_frontend_tune_settings fetunesettings;
1583
1584                 if(fe->dtv_property_cache.state == DTV_TUNE) {
1585                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1586                                 err = -EINVAL;
1587                                 break;
1588                         }
1589                 } else {
1590                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1591                                 err = -EINVAL;
1592                                 break;
1593                         }
1594
1595                         memcpy (&fepriv->parameters, parg,
1596                                 sizeof (struct dvb_frontend_parameters));
1597                         dtv_property_cache_sync(fe, &fepriv->parameters);
1598                 }
1599
1600                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1601                 memcpy(&fetunesettings.parameters, parg,
1602                        sizeof (struct dvb_frontend_parameters));
1603
1604                 /* force auto frequency inversion if requested */
1605                 if (dvb_force_auto_inversion) {
1606                         fepriv->parameters.inversion = INVERSION_AUTO;
1607                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1608                 }
1609                 if (fe->ops.info.type == FE_OFDM) {
1610                         /* without hierarchical coding code_rate_LP is irrelevant,
1611                          * so we tolerate the otherwise invalid FEC_NONE setting */
1612                         if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1613                             fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1614                                 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1615                 }
1616
1617                 /* get frontend-specific tuning settings */
1618                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1619                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1620                         fepriv->max_drift = fetunesettings.max_drift;
1621                         fepriv->step_size = fetunesettings.step_size;
1622                 } else {
1623                         /* default values */
1624                         switch(fe->ops.info.type) {
1625                         case FE_QPSK:
1626                                 fepriv->min_delay = HZ/20;
1627                                 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1628                                 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1629                                 break;
1630
1631                         case FE_QAM:
1632                                 fepriv->min_delay = HZ/20;
1633                                 fepriv->step_size = 0; /* no zigzag */
1634                                 fepriv->max_drift = 0;
1635                                 break;
1636
1637                         case FE_OFDM:
1638                                 fepriv->min_delay = HZ/20;
1639                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1640                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1641                                 break;
1642                         case FE_ATSC:
1643                                 fepriv->min_delay = HZ/20;
1644                                 fepriv->step_size = 0;
1645                                 fepriv->max_drift = 0;
1646                                 break;
1647                         }
1648                 }
1649                 if (dvb_override_tune_delay > 0)
1650                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1651
1652                 fepriv->state = FESTATE_RETUNE;
1653                 dvb_frontend_wakeup(fe);
1654                 dvb_frontend_add_event(fe, 0);
1655                 fepriv->status = 0;
1656                 err = 0;
1657                 break;
1658         }
1659
1660         case FE_GET_EVENT:
1661                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1662                 break;
1663
1664         case FE_GET_FRONTEND:
1665                 if (fe->ops.get_frontend) {
1666                         memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1667                         err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1668                 }
1669                 break;
1670
1671         case FE_SET_FRONTEND_TUNE_MODE:
1672                 fepriv->tune_mode_flags = (unsigned long) parg;
1673                 err = 0;
1674                 break;
1675         };
1676
1677         return err;
1678 }
1679
1680
1681 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1682 {
1683         struct dvb_device *dvbdev = file->private_data;
1684         struct dvb_frontend *fe = dvbdev->priv;
1685         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1686
1687         dprintk ("%s\n", __func__);
1688
1689         poll_wait (file, &fepriv->events.wait_queue, wait);
1690
1691         if (fepriv->events.eventw != fepriv->events.eventr)
1692                 return (POLLIN | POLLRDNORM | POLLPRI);
1693
1694         return 0;
1695 }
1696
1697 static int dvb_frontend_open(struct inode *inode, struct file *file)
1698 {
1699         struct dvb_device *dvbdev = file->private_data;
1700         struct dvb_frontend *fe = dvbdev->priv;
1701         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1702         struct dvb_adapter *adapter = fe->dvb;
1703         int ret;
1704
1705         dprintk ("%s\n", __func__);
1706
1707         if (adapter->mfe_shared) {
1708                 mutex_lock (&adapter->mfe_lock);
1709
1710                 if (adapter->mfe_dvbdev == NULL)
1711                         adapter->mfe_dvbdev = dvbdev;
1712
1713                 else if (adapter->mfe_dvbdev != dvbdev) {
1714                         struct dvb_device
1715                                 *mfedev = adapter->mfe_dvbdev;
1716                         struct dvb_frontend
1717                                 *mfe = mfedev->priv;
1718                         struct dvb_frontend_private
1719                                 *mfepriv = mfe->frontend_priv;
1720                         int mferetry = (dvb_mfe_wait_time << 1);
1721
1722                         mutex_unlock (&adapter->mfe_lock);
1723                         while (mferetry-- && (mfedev->users != -1 ||
1724                                         mfepriv->thread != NULL)) {
1725                                 if(msleep_interruptible(500)) {
1726                                         if(signal_pending(current))
1727                                                 return -EINTR;
1728                                 }
1729                         }
1730
1731                         mutex_lock (&adapter->mfe_lock);
1732                         if(adapter->mfe_dvbdev != dvbdev) {
1733                                 mfedev = adapter->mfe_dvbdev;
1734                                 mfe = mfedev->priv;
1735                                 mfepriv = mfe->frontend_priv;
1736                                 if (mfedev->users != -1 ||
1737                                                 mfepriv->thread != NULL) {
1738                                         mutex_unlock (&adapter->mfe_lock);
1739                                         return -EBUSY;
1740                                 }
1741                                 adapter->mfe_dvbdev = dvbdev;
1742                         }
1743                 }
1744         }
1745
1746         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1747                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1748                         goto err0;
1749         }
1750
1751         if ((ret = dvb_generic_open (inode, file)) < 0)
1752                 goto err1;
1753
1754         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1755                 /* normal tune mode when opened R/W */
1756                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1757                 fepriv->tone = -1;
1758                 fepriv->voltage = -1;
1759
1760                 ret = dvb_frontend_start (fe);
1761                 if (ret)
1762                         goto err2;
1763
1764                 /*  empty event queue */
1765                 fepriv->events.eventr = fepriv->events.eventw = 0;
1766         }
1767
1768         if (adapter->mfe_shared)
1769                 mutex_unlock (&adapter->mfe_lock);
1770         return ret;
1771
1772 err2:
1773         dvb_generic_release(inode, file);
1774 err1:
1775         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1776                 fe->ops.ts_bus_ctrl(fe, 0);
1777 err0:
1778         if (adapter->mfe_shared)
1779                 mutex_unlock (&adapter->mfe_lock);
1780         return ret;
1781 }
1782
1783 static int dvb_frontend_release(struct inode *inode, struct file *file)
1784 {
1785         struct dvb_device *dvbdev = file->private_data;
1786         struct dvb_frontend *fe = dvbdev->priv;
1787         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1788         int ret;
1789
1790         dprintk ("%s\n", __func__);
1791
1792         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
1793                 fepriv->release_jiffies = jiffies;
1794
1795         ret = dvb_generic_release (inode, file);
1796
1797         if (dvbdev->users == -1) {
1798                 if (fepriv->exit == 1) {
1799                         fops_put(file->f_op);
1800                         file->f_op = NULL;
1801                         wake_up(&dvbdev->wait_queue);
1802                 }
1803                 if (fe->ops.ts_bus_ctrl)
1804                         fe->ops.ts_bus_ctrl(fe, 0);
1805         }
1806
1807         return ret;
1808 }
1809
1810 static struct file_operations dvb_frontend_fops = {
1811         .owner          = THIS_MODULE,
1812         .ioctl          = dvb_generic_ioctl,
1813         .poll           = dvb_frontend_poll,
1814         .open           = dvb_frontend_open,
1815         .release        = dvb_frontend_release
1816 };
1817
1818 int dvb_register_frontend(struct dvb_adapter* dvb,
1819                           struct dvb_frontend* fe)
1820 {
1821         struct dvb_frontend_private *fepriv;
1822         static const struct dvb_device dvbdev_template = {
1823                 .users = ~0,
1824                 .writers = 1,
1825                 .readers = (~0)-1,
1826                 .fops = &dvb_frontend_fops,
1827                 .kernel_ioctl = dvb_frontend_ioctl
1828         };
1829
1830         dprintk ("%s\n", __func__);
1831
1832         if (mutex_lock_interruptible(&frontend_mutex))
1833                 return -ERESTARTSYS;
1834
1835         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
1836         if (fe->frontend_priv == NULL) {
1837                 mutex_unlock(&frontend_mutex);
1838                 return -ENOMEM;
1839         }
1840         fepriv = fe->frontend_priv;
1841
1842         init_MUTEX (&fepriv->sem);
1843         init_waitqueue_head (&fepriv->wait_queue);
1844         init_waitqueue_head (&fepriv->events.wait_queue);
1845         mutex_init(&fepriv->events.mtx);
1846         fe->dvb = dvb;
1847         fepriv->inversion = INVERSION_OFF;
1848
1849         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
1850                 fe->dvb->num,
1851                 fe->id,
1852                 fe->ops.info.name);
1853
1854         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
1855                              fe, DVB_DEVICE_FRONTEND);
1856
1857         mutex_unlock(&frontend_mutex);
1858         return 0;
1859 }
1860 EXPORT_SYMBOL(dvb_register_frontend);
1861
1862 int dvb_unregister_frontend(struct dvb_frontend* fe)
1863 {
1864         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1865         dprintk ("%s\n", __func__);
1866
1867         mutex_lock(&frontend_mutex);
1868         dvb_frontend_stop (fe);
1869         mutex_unlock(&frontend_mutex);
1870
1871         if (fepriv->dvbdev->users < -1)
1872                 wait_event(fepriv->dvbdev->wait_queue,
1873                                 fepriv->dvbdev->users==-1);
1874
1875         mutex_lock(&frontend_mutex);
1876         dvb_unregister_device (fepriv->dvbdev);
1877
1878         /* fe is invalid now */
1879         kfree(fepriv);
1880         mutex_unlock(&frontend_mutex);
1881         return 0;
1882 }
1883 EXPORT_SYMBOL(dvb_unregister_frontend);
1884
1885 #ifdef CONFIG_MEDIA_ATTACH
1886 void dvb_frontend_detach(struct dvb_frontend* fe)
1887 {
1888         void *ptr;
1889
1890         if (fe->ops.release_sec) {
1891                 fe->ops.release_sec(fe);
1892                 symbol_put_addr(fe->ops.release_sec);
1893         }
1894         if (fe->ops.tuner_ops.release) {
1895                 fe->ops.tuner_ops.release(fe);
1896                 symbol_put_addr(fe->ops.tuner_ops.release);
1897         }
1898         if (fe->ops.analog_ops.release) {
1899                 fe->ops.analog_ops.release(fe);
1900                 symbol_put_addr(fe->ops.analog_ops.release);
1901         }
1902         ptr = (void*)fe->ops.release;
1903         if (ptr) {
1904                 fe->ops.release(fe);
1905                 symbol_put_addr(ptr);
1906         }
1907 }
1908 #else
1909 void dvb_frontend_detach(struct dvb_frontend* fe)
1910 {
1911         if (fe->ops.release_sec)
1912                 fe->ops.release_sec(fe);
1913         if (fe->ops.tuner_ops.release)
1914                 fe->ops.tuner_ops.release(fe);
1915         if (fe->ops.analog_ops.release)
1916                 fe->ops.analog_ops.release(fe);
1917         if (fe->ops.release)
1918                 fe->ops.release(fe);
1919 }
1920 #endif
1921 EXPORT_SYMBOL(dvb_frontend_detach);