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