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