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                         fe->ops.tuner_ops.sleep(fe);
 589                         if (fe->ops.i2c_gate_ctrl)
 590                                 fe->ops.i2c_gate_ctrl(fe, 0);
 591                 }
 592                 if (fe->ops.sleep)
 593                         fe->ops.sleep(fe);
 594         }
 595
 596         fepriv->thread = NULL;
 597         mb();
 598
 599         dvb_frontend_wakeup(fe);
 600         return 0;
 601 }
 602
 603 static void dvb_frontend_stop(struct dvb_frontend *fe)
 604 {
 605         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 606
 607         dprintk ("%s\n", __func__);
 608
 609         fepriv->exit = 1;
 610         mb();
 611
 612         if (!fepriv->thread)
 613                 return;
 614
 615         kthread_stop(fepriv->thread);
 616
 617         init_MUTEX (&fepriv->sem);
 618         fepriv->state = FESTATE_IDLE;
 619
 620         /* paranoia check in case a signal arrived */
 621         if (fepriv->thread)
 622                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 623                                 fepriv->thread);
 624 }
 625
 626 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 627 {
 628         return ((curtime.tv_usec < lasttime.tv_usec) ?
 629                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 630                 curtime.tv_usec - lasttime.tv_usec);
 631 }
 632 EXPORT_SYMBOL(timeval_usec_diff);
 633
 634 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 635 {
 636         curtime->tv_usec += add_usec;
 637         if (curtime->tv_usec >= 1000000) {
 638                 curtime->tv_usec -= 1000000;
 639                 curtime->tv_sec++;
 640         }
 641 }
 642
 643 /*
 644  * Sleep until gettimeofday() > waketime + add_usec
 645  * This needs to be as precise as possible, but as the delay is
 646  * usually between 2ms and 32ms, it is done using a scheduled msleep
 647  * followed by usleep (normally a busy-wait loop) for the remainder
 648  */
 649 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 650 {
 651         struct timeval lasttime;
 652         s32 delta, newdelta;
 653
 654         timeval_usec_add(waketime, add_usec);
 655
 656         do_gettimeofday(&lasttime);
 657         delta = timeval_usec_diff(lasttime, *waketime);
 658         if (delta > 2500) {
 659                 msleep((delta - 1500) / 1000);
 660                 do_gettimeofday(&lasttime);
 661                 newdelta = timeval_usec_diff(lasttime, *waketime);
 662                 delta = (newdelta > delta) ? 0 : newdelta;
 663         }
 664         if (delta > 0)
 665                 udelay(delta);
 666 }
 667 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 668
 669 static int dvb_frontend_start(struct dvb_frontend *fe)
 670 {
 671         int ret;
 672         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 673         struct task_struct *fe_thread;
 674
 675         dprintk ("%s\n", __func__);
 676
 677         if (fepriv->thread) {
 678                 if (!fepriv->exit)
 679                         return 0;
 680                 else
 681                         dvb_frontend_stop (fe);
 682         }
 683
 684         if (signal_pending(current))
 685                 return -EINTR;
 686         if (down_interruptible (&fepriv->sem))
 687                 return -EINTR;
 688
 689         fepriv->state = FESTATE_IDLE;
 690         fepriv->exit = 0;
 691         fepriv->thread = NULL;
 692         mb();
 693
 694         fe_thread = kthread_run(dvb_frontend_thread, fe,
 695                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 696         if (IS_ERR(fe_thread)) {
 697                 ret = PTR_ERR(fe_thread);
 698                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 699                 up(&fepriv->sem);
 700                 return ret;
 701         }
 702         fepriv->thread = fe_thread;
 703         return 0;
 704 }
 705
 706 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
 707                                         u32 *freq_min, u32 *freq_max)
 708 {
 709         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 710
 711         if (fe->ops.info.frequency_max == 0)
 712                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 713         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 714                 *freq_max = fe->ops.info.frequency_max;
 715         else
 716                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 717
 718         if (*freq_min == 0 || *freq_max == 0)
 719                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 720                        fe->dvb->num,fe->id);
 721 }
 722
 723 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 724                                 struct dvb_frontend_parameters *parms)
 725 {
 726         u32 freq_min;
 727         u32 freq_max;
 728
 729         /* range check: frequency */
 730         dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
 731         if ((freq_min && parms->frequency < freq_min) ||
 732             (freq_max && parms->frequency > freq_max)) {
 733                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 734                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 735                 return -EINVAL;
 736         }
 737
 738         /* range check: symbol rate */
 739         if (fe->ops.info.type == FE_QPSK) {
 740                 if ((fe->ops.info.symbol_rate_min &&
 741                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 742                     (fe->ops.info.symbol_rate_max &&
 743                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 744                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 745                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 746                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 747                         return -EINVAL;
 748                 }
 749
 750         } else if (fe->ops.info.type == FE_QAM) {
 751                 if ((fe->ops.info.symbol_rate_min &&
 752                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 753                     (fe->ops.info.symbol_rate_max &&
 754                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 755                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 756                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 757                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 758                         return -EINVAL;
 759                 }
 760         }
 761
 762         return 0;
 763 }
 764
 765 struct dtv_cmds_h dtv_cmds[] = {
 766         [DTV_TUNE] = {
 767                 .name   = "DTV_TUNE",
 768                 .cmd    = DTV_TUNE,
 769                 .set    = 1,
 770         },
 771         [DTV_CLEAR] = {
 772                 .name   = "DTV_CLEAR",
 773                 .cmd    = DTV_CLEAR,
 774                 .set    = 1,
 775         },
 776
 777         /* Set */
 778         [DTV_FREQUENCY] = {
 779                 .name   = "DTV_FREQUENCY",
 780                 .cmd    = DTV_FREQUENCY,
 781                 .set    = 1,
 782         },
 783         [DTV_BANDWIDTH_HZ] = {
 784                 .name   = "DTV_BANDWIDTH_HZ",
 785                 .cmd    = DTV_BANDWIDTH_HZ,
 786                 .set    = 1,
 787         },
 788         [DTV_MODULATION] = {
 789                 .name   = "DTV_MODULATION",
 790                 .cmd    = DTV_MODULATION,
 791                 .set    = 1,
 792         },
 793         [DTV_INVERSION] = {
 794                 .name   = "DTV_INVERSION",
 795                 .cmd    = DTV_INVERSION,
 796                 .set    = 1,
 797         },
 798         [DTV_DISEQC_MASTER] = {
 799                 .name   = "DTV_DISEQC_MASTER",
 800                 .cmd    = DTV_DISEQC_MASTER,
 801                 .set    = 1,
 802                 .buffer = 1,
 803         },
 804         [DTV_SYMBOL_RATE] = {
 805                 .name   = "DTV_SYMBOL_RATE",
 806                 .cmd    = DTV_SYMBOL_RATE,
 807                 .set    = 1,
 808         },
 809         [DTV_INNER_FEC] = {
 810                 .name   = "DTV_INNER_FEC",
 811                 .cmd    = DTV_INNER_FEC,
 812                 .set    = 1,
 813         },
 814         [DTV_VOLTAGE] = {
 815                 .name   = "DTV_VOLTAGE",
 816                 .cmd    = DTV_VOLTAGE,
 817                 .set    = 1,
 818         },
 819         [DTV_TONE] = {
 820                 .name   = "DTV_TONE",
 821                 .cmd    = DTV_TONE,
 822                 .set    = 1,
 823         },
 824         [DTV_PILOT] = {
 825                 .name   = "DTV_PILOT",
 826                 .cmd    = DTV_PILOT,
 827                 .set    = 1,
 828         },
 829         [DTV_ROLLOFF] = {
 830                 .name   = "DTV_ROLLOFF",
 831                 .cmd    = DTV_ROLLOFF,
 832                 .set    = 1,
 833         },
 834         [DTV_DELIVERY_SYSTEM] = {
 835                 .name   = "DTV_DELIVERY_SYSTEM",
 836                 .cmd    = DTV_DELIVERY_SYSTEM,
 837                 .set    = 1,
 838         },
 839         [DTV_HIERARCHY] = {
 840                 .name   = "DTV_HIERARCHY",
 841                 .cmd    = DTV_HIERARCHY,
 842                 .set    = 1,
 843         },
 844         [DTV_CODE_RATE_HP] = {
 845                 .name   = "DTV_CODE_RATE_HP",
 846                 .cmd    = DTV_CODE_RATE_HP,
 847                 .set    = 1,
 848         },
 849         [DTV_CODE_RATE_LP] = {
 850                 .name   = "DTV_CODE_RATE_LP",
 851                 .cmd    = DTV_CODE_RATE_LP,
 852                 .set    = 1,
 853         },
 854         [DTV_GUARD_INTERVAL] = {
 855                 .name   = "DTV_GUARD_INTERVAL",
 856                 .cmd    = DTV_GUARD_INTERVAL,
 857                 .set    = 1,
 858         },
 859         [DTV_TRANSMISSION_MODE] = {
 860                 .name   = "DTV_TRANSMISSION_MODE",
 861                 .cmd    = DTV_TRANSMISSION_MODE,
 862                 .set    = 1,
 863         },
 864         /* Get */
 865         [DTV_DISEQC_SLAVE_REPLY] = {
 866                 .name   = "DTV_DISEQC_SLAVE_REPLY",
 867                 .cmd    = DTV_DISEQC_SLAVE_REPLY,
 868                 .set    = 0,
 869                 .buffer = 1,
 870         },
 871         [DTV_API_VERSION] = {
 872                 .name   = "DTV_API_VERSION",
 873                 .cmd    = DTV_API_VERSION,
 874                 .set    = 0,
 875         },
 876         [DTV_CODE_RATE_HP] = {
 877                 .name   = "DTV_CODE_RATE_HP",
 878                 .cmd    = DTV_CODE_RATE_HP,
 879                 .set    = 0,
 880         },
 881         [DTV_CODE_RATE_LP] = {
 882                 .name   = "DTV_CODE_RATE_LP",
 883                 .cmd    = DTV_CODE_RATE_LP,
 884                 .set    = 0,
 885         },
 886         [DTV_GUARD_INTERVAL] = {
 887                 .name   = "DTV_GUARD_INTERVAL",
 888                 .cmd    = DTV_GUARD_INTERVAL,
 889                 .set    = 0,
 890         },
 891         [DTV_TRANSMISSION_MODE] = {
 892                 .name   = "DTV_TRANSMISSION_MODE",
 893                 .cmd    = DTV_TRANSMISSION_MODE,
 894                 .set    = 0,
 895         },
 896         [DTV_HIERARCHY] = {
 897                 .name   = "DTV_HIERARCHY",
 898                 .cmd    = DTV_HIERARCHY,
 899                 .set    = 0,
 900         },
 901 };
 902
 903 void dtv_property_dump(struct dtv_property *tvp)
 904 {
 905         int i;
 906
 907         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 908                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 909                         __func__, tvp->cmd);
 910                 return;
 911         }
 912
 913         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 914                 ,__func__
 915                 ,tvp->cmd
 916                 ,dtv_cmds[ tvp->cmd ].name);
 917
 918         if(dtv_cmds[ tvp->cmd ].buffer) {
 919
 920                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 921                         ,__func__
 922                         ,tvp->u.buffer.len);
 923
 924                 for(i = 0; i < tvp->u.buffer.len; i++)
 925                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
 926                                 ,__func__
 927                                 ,i
 928                                 ,tvp->u.buffer.data[i]);
 929
 930         } else
 931                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
 932 }
 933
 934 int is_legacy_delivery_system(fe_delivery_system_t s)
 935 {
 936         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
 937                 (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS))
 938                 return 1;
 939
 940         return 0;
 941 }
 942
 943 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
 944  * drivers can use a single set_frontend tuning function, regardless of whether
 945  * it's being used for the legacy or new API, reducing code and complexity.
 946  */
 947 void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
 948 {
 949         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 950
 951         c->frequency = p->frequency;
 952         c->inversion = p->inversion;
 953
 954         switch (fe->ops.info.type) {
 955         case FE_QPSK:
 956                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 957                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 958                 c->symbol_rate = p->u.qpsk.symbol_rate;
 959                 c->fec_inner = p->u.qpsk.fec_inner;
 960                 c->delivery_system = SYS_DVBS;
 961                 break;
 962         case FE_QAM:
 963                 c->symbol_rate = p->u.qam.symbol_rate;
 964                 c->fec_inner = p->u.qam.fec_inner;
 965                 c->modulation = p->u.qam.modulation;
 966                 c->delivery_system = SYS_DVBC_ANNEX_AC;
 967                 break;
 968         case FE_OFDM:
 969                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
 970                         c->bandwidth_hz = 6000000;
 971                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
 972                         c->bandwidth_hz = 7000000;
 973                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
 974                         c->bandwidth_hz = 8000000;
 975                 else
 976                         /* Including BANDWIDTH_AUTO */
 977                         c->bandwidth_hz = 0;
 978                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
 979                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
 980                 c->modulation = p->u.ofdm.constellation;
 981                 c->transmission_mode = p->u.ofdm.transmission_mode;
 982                 c->guard_interval = p->u.ofdm.guard_interval;
 983                 c->hierarchy = p->u.ofdm.hierarchy_information;
 984                 c->delivery_system = SYS_DVBT;
 985                 break;
 986         case FE_ATSC:
 987                 c->modulation = p->u.vsb.modulation;
 988                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
 989                         c->delivery_system = SYS_ATSC;
 990                 else
 991                         c->delivery_system = SYS_DVBC_ANNEX_B;
 992                 break;
 993         }
 994 }
 995
 996 /* Ensure the cached values are set correctly in the frontend
 997  * legacy tuning structures, for the advanced tuning API.
 998  */
 999 void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1000 {
1001         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1002         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1003         struct dvb_frontend_parameters *p = &fepriv->parameters;
1004
1005         p->frequency = c->frequency;
1006         p->inversion = c->inversion;
1007
1008         switch (fe->ops.info.type) {
1009         case FE_QPSK:
1010                 dprintk("%s() Preparing QPSK req\n", __func__);
1011                 p->u.qpsk.symbol_rate = c->symbol_rate;
1012                 p->u.qpsk.fec_inner = c->fec_inner;
1013                 c->delivery_system = SYS_DVBS;
1014                 break;
1015         case FE_QAM:
1016                 dprintk("%s() Preparing QAM req\n", __func__);
1017                 p->u.qam.symbol_rate = c->symbol_rate;
1018                 p->u.qam.fec_inner = c->fec_inner;
1019                 p->u.qam.modulation = c->modulation;
1020                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1021                 break;
1022         case FE_OFDM:
1023                 dprintk("%s() Preparing OFDM req\n", __func__);
1024                 if (c->bandwidth_hz == 6000000)
1025                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1026                 else if (c->bandwidth_hz == 7000000)
1027                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1028                 else if (c->bandwidth_hz == 8000000)
1029                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1030                 else
1031                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1032                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1033                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1034                 p->u.ofdm.constellation = c->modulation;
1035                 p->u.ofdm.transmission_mode = c->transmission_mode;
1036                 p->u.ofdm.guard_interval = c->guard_interval;
1037                 p->u.ofdm.hierarchy_information = c->hierarchy;
1038                 c->delivery_system = SYS_DVBT;
1039                 break;
1040         case FE_ATSC:
1041                 dprintk("%s() Preparing VSB req\n", __func__);
1042                 p->u.vsb.modulation = c->modulation;
1043                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1044                         c->delivery_system = SYS_ATSC;
1045                 else
1046                         c->delivery_system = SYS_DVBC_ANNEX_B;
1047                 break;
1048         }
1049 }
1050
1051 /* Ensure the cached values are set correctly in the frontend
1052  * legacy tuning structures, for the legacy tuning API.
1053  */
1054 void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1055 {
1056         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1057         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1058         struct dvb_frontend_parameters *p = &fepriv->parameters;
1059
1060         p->frequency = c->frequency;
1061         p->inversion = c->inversion;
1062
1063         switch(c->modulation) {
1064         case PSK_8:
1065         case APSK_16:
1066         case APSK_32:
1067         case QPSK:
1068                 p->u.qpsk.symbol_rate = c->symbol_rate;
1069                 p->u.qpsk.fec_inner = c->fec_inner;
1070                 break;
1071         default:
1072                 break;
1073         }
1074
1075         if(c->delivery_system == SYS_ISDBT) {
1076                 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1077                 p->frequency = c->frequency;
1078                 p->inversion = INVERSION_AUTO;
1079                 p->u.ofdm.constellation = QAM_AUTO;
1080                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1081                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1082                 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1083                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1084                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1085                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1086         }
1087 }
1088
1089 void dtv_property_cache_submit(struct dvb_frontend *fe)
1090 {
1091         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1092
1093         /* For legacy delivery systems we don't need the delivery_system to
1094          * be specified, but we populate the older structures from the cache
1095          * so we can call set_frontend on older drivers.
1096          */
1097         if(is_legacy_delivery_system(c->delivery_system)) {
1098
1099                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1100                 dtv_property_legacy_params_sync(fe);
1101
1102         } else {
1103                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1104
1105                 /* For advanced delivery systems / modulation types ...
1106                  * we seed the lecacy dvb_frontend_parameters structure
1107                  * so that the sanity checking code later in the IOCTL processing
1108                  * can validate our basic frequency ranges, symbolrates, modulation
1109                  * etc.
1110                  */
1111                 dtv_property_adv_params_sync(fe);
1112         }
1113 }
1114
1115 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1116                         unsigned int cmd, void *parg);
1117 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1118                         unsigned int cmd, void *parg);
1119
1120 int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp,
1121         struct inode *inode, struct file *file)
1122 {
1123         int r = 0;
1124
1125         dtv_property_dump(tvp);
1126
1127         /* Allow the frontend to validate incoming properties */
1128         if (fe->ops.get_property)
1129                 r = fe->ops.get_property(fe, tvp);
1130
1131         if (r < 0)
1132                 return r;
1133
1134         switch(tvp->cmd) {
1135         case DTV_FREQUENCY:
1136                 tvp->u.data = fe->dtv_property_cache.frequency;
1137                 break;
1138         case DTV_MODULATION:
1139                 tvp->u.data = fe->dtv_property_cache.modulation;
1140                 break;
1141         case DTV_BANDWIDTH_HZ:
1142                 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1143                 break;
1144         case DTV_INVERSION:
1145                 tvp->u.data = fe->dtv_property_cache.inversion;
1146                 break;
1147         case DTV_SYMBOL_RATE:
1148                 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1149                 break;
1150         case DTV_INNER_FEC:
1151                 tvp->u.data = fe->dtv_property_cache.fec_inner;
1152                 break;
1153         case DTV_PILOT:
1154                 tvp->u.data = fe->dtv_property_cache.pilot;
1155                 break;
1156         case DTV_ROLLOFF:
1157                 tvp->u.data = fe->dtv_property_cache.rolloff;
1158                 break;
1159         case DTV_DELIVERY_SYSTEM:
1160                 tvp->u.data = fe->dtv_property_cache.delivery_system;
1161                 break;
1162         case DTV_VOLTAGE:
1163                 tvp->u.data = fe->dtv_property_cache.voltage;
1164                 break;
1165         case DTV_TONE:
1166                 tvp->u.data = fe->dtv_property_cache.sectone;
1167                 break;
1168         case DTV_API_VERSION:
1169                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1170                 break;
1171         case DTV_CODE_RATE_HP:
1172                 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1173                 break;
1174         case DTV_CODE_RATE_LP:
1175                 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1176                 break;
1177         case DTV_GUARD_INTERVAL:
1178                 tvp->u.data = fe->dtv_property_cache.guard_interval;
1179                 break;
1180         case DTV_TRANSMISSION_MODE:
1181                 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1182                 break;
1183         case DTV_HIERARCHY:
1184                 tvp->u.data = fe->dtv_property_cache.hierarchy;
1185                 break;
1186         default:
1187                 r = -1;
1188         }
1189
1190         return r;
1191 }
1192
1193 int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp,
1194         struct inode *inode, struct file *file)
1195 {
1196         int r = 0;
1197         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1198         dtv_property_dump(tvp);
1199
1200         /* Allow the frontend to validate incoming properties */
1201         if (fe->ops.set_property)
1202                 r = fe->ops.set_property(fe, tvp);
1203
1204         if (r < 0)
1205                 return r;
1206
1207         switch(tvp->cmd) {
1208         case DTV_CLEAR:
1209                 /* Reset a cache of data specific to the frontend here. This does
1210                  * not effect hardware.
1211                  */
1212                 dprintk("%s() Flushing property cache\n", __func__);
1213                 memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1214                 fe->dtv_property_cache.state = tvp->cmd;
1215                 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1216                 break;
1217         case DTV_TUNE:
1218                 /* interpret the cache of data, build either a traditional frontend
1219                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1220                  * ioctl.
1221                  */
1222                 fe->dtv_property_cache.state = tvp->cmd;
1223                 dprintk("%s() Finalised property cache\n", __func__);
1224                 dtv_property_cache_submit(fe);
1225
1226                 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1227                         &fepriv->parameters);
1228                 break;
1229         case DTV_FREQUENCY:
1230                 fe->dtv_property_cache.frequency = tvp->u.data;
1231                 break;
1232         case DTV_MODULATION:
1233                 fe->dtv_property_cache.modulation = tvp->u.data;
1234                 break;
1235         case DTV_BANDWIDTH_HZ:
1236                 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1237                 break;
1238         case DTV_INVERSION:
1239                 fe->dtv_property_cache.inversion = tvp->u.data;
1240                 break;
1241         case DTV_SYMBOL_RATE:
1242                 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1243                 break;
1244         case DTV_INNER_FEC:
1245                 fe->dtv_property_cache.fec_inner = tvp->u.data;
1246                 break;
1247         case DTV_PILOT:
1248                 fe->dtv_property_cache.pilot = tvp->u.data;
1249                 break;
1250         case DTV_ROLLOFF:
1251                 fe->dtv_property_cache.rolloff = tvp->u.data;
1252                 break;
1253         case DTV_DELIVERY_SYSTEM:
1254                 fe->dtv_property_cache.delivery_system = tvp->u.data;
1255                 break;
1256         case DTV_VOLTAGE:
1257                 fe->dtv_property_cache.voltage = tvp->u.data;
1258                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1259                         (void *)fe->dtv_property_cache.voltage);
1260                 break;
1261         case DTV_TONE:
1262                 fe->dtv_property_cache.sectone = tvp->u.data;
1263                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1264                         (void *)fe->dtv_property_cache.sectone);
1265                 break;
1266         case DTV_CODE_RATE_HP:
1267                 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1268                 break;
1269         case DTV_CODE_RATE_LP:
1270                 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1271                 break;
1272         case DTV_GUARD_INTERVAL:
1273                 fe->dtv_property_cache.guard_interval = tvp->u.data;
1274                 break;
1275         case DTV_TRANSMISSION_MODE:
1276                 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1277                 break;
1278         case DTV_HIERARCHY:
1279                 fe->dtv_property_cache.hierarchy = tvp->u.data;
1280                 break;
1281         default:
1282                 r = -1;
1283         }
1284
1285         return r;
1286 }
1287
1288 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1289                         unsigned int cmd, void *parg)
1290 {
1291         struct dvb_device *dvbdev = file->private_data;
1292         struct dvb_frontend *fe = dvbdev->priv;
1293         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1294         int err = -EOPNOTSUPP;
1295
1296         dprintk ("%s\n", __func__);
1297
1298         if (fepriv->exit)
1299                 return -ENODEV;
1300
1301         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1302             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1303              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1304                 return -EPERM;
1305
1306         if (down_interruptible (&fepriv->sem))
1307                 return -ERESTARTSYS;
1308
1309         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1310                 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1311         else {
1312                 fe->dtv_property_cache.state = DTV_UNDEFINED;
1313                 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1314         }
1315
1316         up(&fepriv->sem);
1317         return err;
1318 }
1319
1320 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1321                         unsigned int cmd, void *parg)
1322 {
1323         struct dvb_device *dvbdev = file->private_data;
1324         struct dvb_frontend *fe = dvbdev->priv;
1325         int err = 0;
1326
1327         struct dtv_properties *tvps = NULL;
1328         struct dtv_property *tvp = NULL;
1329         int i;
1330
1331         dprintk("%s\n", __func__);
1332
1333         if(cmd == FE_SET_PROPERTY) {
1334                 tvps = (struct dtv_properties __user *)parg;
1335
1336                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1337                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1338
1339                 /* Put an arbitrary limit on the number of messages that can
1340                  * be sent at once */
1341                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1342                         return -EINVAL;
1343
1344                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1345                         sizeof(struct dtv_property), GFP_KERNEL);
1346                 if (!tvp) {
1347                         err = -ENOMEM;
1348                         goto out;
1349                 }
1350
1351                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1352                         err = -EFAULT;
1353                         goto out;
1354                 }
1355
1356                 for (i = 0; i < tvps->num; i++) {
1357                         (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1358                         err |= (tvp + i)->result;
1359                 }
1360
1361                 if(fe->dtv_property_cache.state == DTV_TUNE)
1362                         dprintk("%s() Property cache is full, tuning\n", __func__);
1363
1364         } else
1365         if(cmd == FE_GET_PROPERTY) {
1366
1367                 tvps = (struct dtv_properties __user *)parg;
1368
1369                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1370                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1371
1372                 /* Put an arbitrary limit on the number of messages that can
1373                  * be sent at once */
1374                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1375                         return -EINVAL;
1376
1377                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1378                         sizeof(struct dtv_property), GFP_KERNEL);
1379                 if (!tvp) {
1380                         err = -ENOMEM;
1381                         goto out;
1382                 }
1383
1384                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1385                         err = -EFAULT;
1386                         goto out;
1387                 }
1388
1389                 for (i = 0; i < tvps->num; i++) {
1390                         (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1391                         err |= (tvp + i)->result;
1392                 }
1393
1394                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1395                         err = -EFAULT;
1396                         goto out;
1397                 }
1398
1399         } else
1400                 err = -EOPNOTSUPP;
1401
1402 out:
1403         kfree(tvp);
1404         return err;
1405 }
1406
1407 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1408                         unsigned int cmd, void *parg)
1409 {
1410         struct dvb_device *dvbdev = file->private_data;
1411         struct dvb_frontend *fe = dvbdev->priv;
1412         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1413         int err = -EOPNOTSUPP;
1414
1415         switch (cmd) {
1416         case FE_GET_INFO: {
1417                 struct dvb_frontend_info* info = parg;
1418                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1419                 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1420
1421                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1422                  * do it, it is done for it. */
1423                 info->caps |= FE_CAN_INVERSION_AUTO;
1424                 err = 0;
1425                 break;
1426         }
1427
1428         case FE_READ_STATUS: {
1429                 fe_status_t* status = parg;
1430
1431                 /* if retune was requested but hasn't occured yet, prevent
1432                  * that user get signal state from previous tuning */
1433                 if(fepriv->state == FESTATE_RETUNE) {
1434                         err=0;
1435                         *status = 0;
1436                         break;
1437                 }
1438
1439                 if (fe->ops.read_status)
1440                         err = fe->ops.read_status(fe, status);
1441                 break;
1442         }
1443         case FE_READ_BER:
1444                 if (fe->ops.read_ber)
1445                         err = fe->ops.read_ber(fe, (__u32*) parg);
1446                 break;
1447
1448         case FE_READ_SIGNAL_STRENGTH:
1449                 if (fe->ops.read_signal_strength)
1450                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1451                 break;
1452
1453         case FE_READ_SNR:
1454                 if (fe->ops.read_snr)
1455                         err = fe->ops.read_snr(fe, (__u16*) parg);
1456                 break;
1457
1458         case FE_READ_UNCORRECTED_BLOCKS:
1459                 if (fe->ops.read_ucblocks)
1460                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1461                 break;
1462
1463
1464         case FE_DISEQC_RESET_OVERLOAD:
1465                 if (fe->ops.diseqc_reset_overload) {
1466                         err = fe->ops.diseqc_reset_overload(fe);
1467                         fepriv->state = FESTATE_DISEQC;
1468                         fepriv->status = 0;
1469                 }
1470                 break;
1471
1472         case FE_DISEQC_SEND_MASTER_CMD:
1473                 if (fe->ops.diseqc_send_master_cmd) {
1474                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1475                         fepriv->state = FESTATE_DISEQC;
1476                         fepriv->status = 0;
1477                 }
1478                 break;
1479
1480         case FE_DISEQC_SEND_BURST:
1481                 if (fe->ops.diseqc_send_burst) {
1482                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1483                         fepriv->state = FESTATE_DISEQC;
1484                         fepriv->status = 0;
1485                 }
1486                 break;
1487
1488         case FE_SET_TONE:
1489                 if (fe->ops.set_tone) {
1490                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1491                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1492                         fepriv->state = FESTATE_DISEQC;
1493                         fepriv->status = 0;
1494                 }
1495                 break;
1496
1497         case FE_SET_VOLTAGE:
1498                 if (fe->ops.set_voltage) {
1499                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1500                         fepriv->voltage = (fe_sec_voltage_t) parg;
1501                         fepriv->state = FESTATE_DISEQC;
1502                         fepriv->status = 0;
1503                 }
1504                 break;
1505
1506         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1507                 if (fe->ops.dishnetwork_send_legacy_command) {
1508                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1509                         fepriv->state = FESTATE_DISEQC;
1510                         fepriv->status = 0;
1511                 } else if (fe->ops.set_voltage) {
1512                         /*
1513                          * NOTE: This is a fallback condition.  Some frontends
1514                          * (stv0299 for instance) take longer than 8msec to
1515                          * respond to a set_voltage command.  Those switches
1516                          * need custom routines to switch properly.  For all
1517                          * other frontends, the following shoule work ok.
1518                          * Dish network legacy switches (as used by Dish500)
1519                          * are controlled by sending 9-bit command words
1520                          * spaced 8msec apart.
1521                          * the actual command word is switch/port dependant
1522                          * so it is up to the userspace application to send
1523                          * the right command.
1524                          * The command must always start with a '0' after
1525                          * initialization, so parg is 8 bits and does not
1526                          * include the initialization or start bit
1527                          */
1528                         unsigned long swcmd = ((unsigned long) parg) << 1;
1529                         struct timeval nexttime;
1530                         struct timeval tv[10];
1531                         int i;
1532                         u8 last = 1;
1533                         if (dvb_frontend_debug)
1534                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1535                         do_gettimeofday(&nexttime);
1536                         if (dvb_frontend_debug)
1537                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1538                         /* before sending a command, initialize by sending
1539                          * a 32ms 18V to the switch
1540                          */
1541                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1542                         dvb_frontend_sleep_until(&nexttime, 32000);
1543
1544                         for (i = 0; i < 9; i++) {
1545                                 if (dvb_frontend_debug)
1546                                         do_gettimeofday(&tv[i + 1]);
1547                                 if ((swcmd & 0x01) != last) {
1548                                         /* set voltage to (last ? 13V : 18V) */
1549                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1550                                         last = (last) ? 0 : 1;
1551                                 }
1552                                 swcmd = swcmd >> 1;
1553                                 if (i != 8)
1554                                         dvb_frontend_sleep_until(&nexttime, 8000);
1555                         }
1556                         if (dvb_frontend_debug) {
1557                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1558                                         __func__, fe->dvb->num);
1559                                 for (i = 1; i < 10; i++)
1560                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1561                         }
1562                         err = 0;
1563                         fepriv->state = FESTATE_DISEQC;
1564                         fepriv->status = 0;
1565                 }
1566                 break;
1567
1568         case FE_DISEQC_RECV_SLAVE_REPLY:
1569                 if (fe->ops.diseqc_recv_slave_reply)
1570                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1571                 break;
1572
1573         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1574                 if (fe->ops.enable_high_lnb_voltage)
1575                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1576                 break;
1577
1578         case FE_SET_FRONTEND: {
1579                 struct dvb_frontend_tune_settings fetunesettings;
1580
1581                 if(fe->dtv_property_cache.state == DTV_TUNE) {
1582                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1583                                 err = -EINVAL;
1584                                 break;
1585                         }
1586                 } else {
1587                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1588                                 err = -EINVAL;
1589                                 break;
1590                         }
1591
1592                         memcpy (&fepriv->parameters, parg,
1593                                 sizeof (struct dvb_frontend_parameters));
1594                         dtv_property_cache_sync(fe, &fepriv->parameters);
1595                 }
1596
1597                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1598                 memcpy(&fetunesettings.parameters, parg,
1599                        sizeof (struct dvb_frontend_parameters));
1600
1601                 /* force auto frequency inversion if requested */
1602                 if (dvb_force_auto_inversion) {
1603                         fepriv->parameters.inversion = INVERSION_AUTO;
1604                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1605                 }
1606                 if (fe->ops.info.type == FE_OFDM) {
1607                         /* without hierarchical coding code_rate_LP is irrelevant,
1608                          * so we tolerate the otherwise invalid FEC_NONE setting */
1609                         if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1610                             fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1611                                 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1612                 }
1613
1614                 /* get frontend-specific tuning settings */
1615                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1616                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1617                         fepriv->max_drift = fetunesettings.max_drift;
1618                         fepriv->step_size = fetunesettings.step_size;
1619                 } else {
1620                         /* default values */
1621                         switch(fe->ops.info.type) {
1622                         case FE_QPSK:
1623                                 fepriv->min_delay = HZ/20;
1624                                 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1625                                 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1626                                 break;
1627
1628                         case FE_QAM:
1629                                 fepriv->min_delay = HZ/20;
1630                                 fepriv->step_size = 0; /* no zigzag */
1631                                 fepriv->max_drift = 0;
1632                                 break;
1633
1634                         case FE_OFDM:
1635                                 fepriv->min_delay = HZ/20;
1636                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1637                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1638                                 break;
1639                         case FE_ATSC:
1640                                 fepriv->min_delay = HZ/20;
1641                                 fepriv->step_size = 0;
1642                                 fepriv->max_drift = 0;
1643                                 break;
1644                         }
1645                 }
1646                 if (dvb_override_tune_delay > 0)
1647                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1648
1649                 fepriv->state = FESTATE_RETUNE;
1650                 dvb_frontend_wakeup(fe);
1651                 dvb_frontend_add_event(fe, 0);
1652                 fepriv->status = 0;
1653                 err = 0;
1654                 break;
1655         }
1656
1657         case FE_GET_EVENT:
1658                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1659                 break;
1660
1661         case FE_GET_FRONTEND:
1662                 if (fe->ops.get_frontend) {
1663                         memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1664                         err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1665                 }
1666                 break;
1667
1668         case FE_SET_FRONTEND_TUNE_MODE:
1669                 fepriv->tune_mode_flags = (unsigned long) parg;
1670                 err = 0;
1671                 break;
1672         };
1673
1674         return err;
1675 }
1676
1677
1678 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1679 {
1680         struct dvb_device *dvbdev = file->private_data;
1681         struct dvb_frontend *fe = dvbdev->priv;
1682         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1683
1684         dprintk ("%s\n", __func__);
1685
1686         poll_wait (file, &fepriv->events.wait_queue, wait);
1687
1688         if (fepriv->events.eventw != fepriv->events.eventr)
1689                 return (POLLIN | POLLRDNORM | POLLPRI);
1690
1691         return 0;
1692 }
1693
1694 static int dvb_frontend_open(struct inode *inode, struct file *file)
1695 {
1696         struct dvb_device *dvbdev = file->private_data;
1697         struct dvb_frontend *fe = dvbdev->priv;
1698         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1699         struct dvb_adapter *adapter = fe->dvb;
1700         int ret;
1701
1702         dprintk ("%s\n", __func__);
1703
1704         if (adapter->mfe_shared) {
1705                 mutex_lock (&adapter->mfe_lock);
1706
1707                 if (adapter->mfe_dvbdev == NULL)
1708                         adapter->mfe_dvbdev = dvbdev;
1709
1710                 else if (adapter->mfe_dvbdev != dvbdev) {
1711                         struct dvb_device
1712                                 *mfedev = adapter->mfe_dvbdev;
1713                         struct dvb_frontend
1714                                 *mfe = mfedev->priv;
1715                         struct dvb_frontend_private
1716                                 *mfepriv = mfe->frontend_priv;
1717                         int mferetry = (dvb_mfe_wait_time << 1);
1718
1719                         mutex_unlock (&adapter->mfe_lock);
1720                         while (mferetry-- && (mfedev->users != -1 ||
1721                                         mfepriv->thread != NULL)) {
1722                                 if(msleep_interruptible(500)) {
1723                                         if(signal_pending(current))
1724                                                 return -EINTR;
1725                                 }
1726                         }
1727
1728                         mutex_lock (&adapter->mfe_lock);
1729                         if(adapter->mfe_dvbdev != dvbdev) {
1730                                 mfedev = adapter->mfe_dvbdev;
1731                                 mfe = mfedev->priv;
1732                                 mfepriv = mfe->frontend_priv;
1733                                 if (mfedev->users != -1 ||
1734                                                 mfepriv->thread != NULL) {
1735                                         mutex_unlock (&adapter->mfe_lock);
1736                                         return -EBUSY;
1737                                 }
1738                                 adapter->mfe_dvbdev = dvbdev;
1739                         }
1740                 }
1741         }
1742
1743         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1744                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1745                         goto err0;
1746         }
1747
1748         if ((ret = dvb_generic_open (inode, file)) < 0)
1749                 goto err1;
1750
1751         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1752                 /* normal tune mode when opened R/W */
1753                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1754                 fepriv->tone = -1;
1755                 fepriv->voltage = -1;
1756
1757                 ret = dvb_frontend_start (fe);
1758                 if (ret)
1759                         goto err2;
1760
1761                 /*  empty event queue */
1762                 fepriv->events.eventr = fepriv->events.eventw = 0;
1763         }
1764
1765         if (adapter->mfe_shared)
1766                 mutex_unlock (&adapter->mfe_lock);
1767         return ret;
1768
1769 err2:
1770         dvb_generic_release(inode, file);
1771 err1:
1772         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1773                 fe->ops.ts_bus_ctrl(fe, 0);
1774 err0:
1775         if (adapter->mfe_shared)
1776                 mutex_unlock (&adapter->mfe_lock);
1777         return ret;
1778 }
1779
1780 static int dvb_frontend_release(struct inode *inode, struct file *file)
1781 {
1782         struct dvb_device *dvbdev = file->private_data;
1783         struct dvb_frontend *fe = dvbdev->priv;
1784         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1785         int ret;
1786
1787         dprintk ("%s\n", __func__);
1788
1789         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
1790                 fepriv->release_jiffies = jiffies;
1791
1792         ret = dvb_generic_release (inode, file);
1793
1794         if (dvbdev->users == -1) {
1795                 if (fepriv->exit == 1) {
1796                         fops_put(file->f_op);
1797                         file->f_op = NULL;
1798                         wake_up(&dvbdev->wait_queue);
1799                 }
1800                 if (fe->ops.ts_bus_ctrl)
1801                         fe->ops.ts_bus_ctrl(fe, 0);
1802         }
1803
1804         return ret;
1805 }
1806
1807 static struct file_operations dvb_frontend_fops = {
1808         .owner          = THIS_MODULE,
1809         .ioctl          = dvb_generic_ioctl,
1810         .poll           = dvb_frontend_poll,
1811         .open           = dvb_frontend_open,
1812         .release        = dvb_frontend_release
1813 };
1814
1815 int dvb_register_frontend(struct dvb_adapter* dvb,
1816                           struct dvb_frontend* fe)
1817 {
1818         struct dvb_frontend_private *fepriv;
1819         static const struct dvb_device dvbdev_template = {
1820                 .users = ~0,
1821                 .writers = 1,
1822                 .readers = (~0)-1,
1823                 .fops = &dvb_frontend_fops,
1824                 .kernel_ioctl = dvb_frontend_ioctl
1825         };
1826
1827         dprintk ("%s\n", __func__);
1828
1829         if (mutex_lock_interruptible(&frontend_mutex))
1830                 return -ERESTARTSYS;
1831
1832         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
1833         if (fe->frontend_priv == NULL) {
1834                 mutex_unlock(&frontend_mutex);
1835                 return -ENOMEM;
1836         }
1837         fepriv = fe->frontend_priv;
1838
1839         init_MUTEX (&fepriv->sem);
1840         init_waitqueue_head (&fepriv->wait_queue);
1841         init_waitqueue_head (&fepriv->events.wait_queue);
1842         mutex_init(&fepriv->events.mtx);
1843         fe->dvb = dvb;
1844         fepriv->inversion = INVERSION_OFF;
1845
1846         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
1847                 fe->dvb->num,
1848                 fe->id,
1849                 fe->ops.info.name);
1850
1851         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
1852                              fe, DVB_DEVICE_FRONTEND);
1853
1854         mutex_unlock(&frontend_mutex);
1855         return 0;
1856 }
1857 EXPORT_SYMBOL(dvb_register_frontend);
1858
1859 int dvb_unregister_frontend(struct dvb_frontend* fe)
1860 {
1861         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1862         dprintk ("%s\n", __func__);
1863
1864         mutex_lock(&frontend_mutex);
1865         dvb_frontend_stop (fe);
1866         mutex_unlock(&frontend_mutex);
1867
1868         if (fepriv->dvbdev->users < -1)
1869                 wait_event(fepriv->dvbdev->wait_queue,
1870                                 fepriv->dvbdev->users==-1);
1871
1872         mutex_lock(&frontend_mutex);
1873         dvb_unregister_device (fepriv->dvbdev);
1874
1875         /* fe is invalid now */
1876         kfree(fepriv);
1877         mutex_unlock(&frontend_mutex);
1878         return 0;
1879 }
1880 EXPORT_SYMBOL(dvb_unregister_frontend);
1881
1882 #ifdef CONFIG_MEDIA_ATTACH
1883 void dvb_frontend_detach(struct dvb_frontend* fe)
1884 {
1885         void *ptr;
1886
1887         if (fe->ops.release_sec) {
1888                 fe->ops.release_sec(fe);
1889                 symbol_put_addr(fe->ops.release_sec);
1890         }
1891         if (fe->ops.tuner_ops.release) {
1892                 fe->ops.tuner_ops.release(fe);
1893                 symbol_put_addr(fe->ops.tuner_ops.release);
1894         }
1895         if (fe->ops.analog_ops.release) {
1896                 fe->ops.analog_ops.release(fe);
1897                 symbol_put_addr(fe->ops.analog_ops.release);
1898         }
1899         ptr = (void*)fe->ops.release;
1900         if (ptr) {
1901                 fe->ops.release(fe);
1902                 symbol_put_addr(ptr);
1903         }
1904 }
1905 #else
1906 void dvb_frontend_detach(struct dvb_frontend* fe)
1907 {
1908         if (fe->ops.release_sec)
1909                 fe->ops.release_sec(fe);
1910         if (fe->ops.tuner_ops.release)
1911                 fe->ops.tuner_ops.release(fe);
1912         if (fe->ops.analog_ops.release)
1913                 fe->ops.analog_ops.release(fe);
1914         if (fe->ops.release)
1915                 fe->ops.release(fe);
1916 }
1917 #endif
1918 EXPORT_SYMBOL(dvb_frontend_detach);