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         enum dvbfe_search algo_status;
 132 };
 133
 134 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 135
 136 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 137 {
 138         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 139         struct dvb_fe_events *events = &fepriv->events;
 140         struct dvb_frontend_event *e;
 141         int wp;
 142
 143         dprintk ("%s\n", __func__);
 144
 145         if (mutex_lock_interruptible (&events->mtx))
 146                 return;
 147
 148         wp = (events->eventw + 1) % MAX_EVENT;
 149
 150         if (wp == events->eventr) {
 151                 events->overflow = 1;
 152                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 153         }
 154
 155         e = &events->events[events->eventw];
 156
 157         memcpy (&e->parameters, &fepriv->parameters,
 158                 sizeof (struct dvb_frontend_parameters));
 159
 160         if (status & FE_HAS_LOCK)
 161                 if (fe->ops.get_frontend)
 162                         fe->ops.get_frontend(fe, &e->parameters);
 163
 164         events->eventw = wp;
 165
 166         mutex_unlock(&events->mtx);
 167
 168         e->status = status;
 169
 170         wake_up_interruptible (&events->wait_queue);
 171 }
 172
 173 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 174                             struct dvb_frontend_event *event, int flags)
 175 {
 176         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 177         struct dvb_fe_events *events = &fepriv->events;
 178
 179         dprintk ("%s\n", __func__);
 180
 181         if (events->overflow) {
 182                 events->overflow = 0;
 183                 return -EOVERFLOW;
 184         }
 185
 186         if (events->eventw == events->eventr) {
 187                 int ret;
 188
 189                 if (flags & O_NONBLOCK)
 190                         return -EWOULDBLOCK;
 191
 192                 up(&fepriv->sem);
 193
 194                 ret = wait_event_interruptible (events->wait_queue,
 195                                                 events->eventw != events->eventr);
 196
 197                 if (down_interruptible (&fepriv->sem))
 198                         return -ERESTARTSYS;
 199
 200                 if (ret < 0)
 201                         return ret;
 202         }
 203
 204         if (mutex_lock_interruptible (&events->mtx))
 205                 return -ERESTARTSYS;
 206
 207         memcpy (event, &events->events[events->eventr],
 208                 sizeof(struct dvb_frontend_event));
 209
 210         events->eventr = (events->eventr + 1) % MAX_EVENT;
 211
 212         mutex_unlock(&events->mtx);
 213
 214         return 0;
 215 }
 216
 217 static void dvb_frontend_init(struct dvb_frontend *fe)
 218 {
 219         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 220                  fe->dvb->num,
 221                  fe->id,
 222                  fe->ops.info.name);
 223
 224         if (fe->ops.init)
 225                 fe->ops.init(fe);
 226         if (fe->ops.tuner_ops.init) {
 227                 if (fe->ops.i2c_gate_ctrl)
 228                         fe->ops.i2c_gate_ctrl(fe, 1);
 229                 fe->ops.tuner_ops.init(fe);
 230                 if (fe->ops.i2c_gate_ctrl)
 231                         fe->ops.i2c_gate_ctrl(fe, 0);
 232         }
 233 }
 234
 235 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 236 {
 237         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 238
 239         fepriv->reinitialise = 1;
 240         dvb_frontend_wakeup(fe);
 241 }
 242 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 243
 244 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 245 {
 246         int q2;
 247
 248         dprintk ("%s\n", __func__);
 249
 250         if (locked)
 251                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 252         else
 253                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 254
 255         q2 = fepriv->quality - 128;
 256         q2 *= q2;
 257
 258         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 259 }
 260
 261 /**
 262  * Performs automatic twiddling of frontend parameters.
 263  *
 264  * @param fe The frontend concerned.
 265  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 266  * @returns Number of complete iterations that have been performed.
 267  */
 268 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 269 {
 270         int autoinversion;
 271         int ready = 0;
 272         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 273         int original_inversion = fepriv->parameters.inversion;
 274         u32 original_frequency = fepriv->parameters.frequency;
 275
 276         /* are we using autoinversion? */
 277         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 278                          (fepriv->parameters.inversion == INVERSION_AUTO));
 279
 280         /* setup parameters correctly */
 281         while(!ready) {
 282                 /* calculate the lnb_drift */
 283                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 284
 285                 /* wrap the auto_step if we've exceeded the maximum drift */
 286                 if (fepriv->lnb_drift > fepriv->max_drift) {
 287                         fepriv->auto_step = 0;
 288                         fepriv->auto_sub_step = 0;
 289                         fepriv->lnb_drift = 0;
 290                 }
 291
 292                 /* perform inversion and +/- zigzag */
 293                 switch(fepriv->auto_sub_step) {
 294                 case 0:
 295                         /* try with the current inversion and current drift setting */
 296                         ready = 1;
 297                         break;
 298
 299                 case 1:
 300                         if (!autoinversion) break;
 301
 302                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 303                         ready = 1;
 304                         break;
 305
 306                 case 2:
 307                         if (fepriv->lnb_drift == 0) break;
 308
 309                         fepriv->lnb_drift = -fepriv->lnb_drift;
 310                         ready = 1;
 311                         break;
 312
 313                 case 3:
 314                         if (fepriv->lnb_drift == 0) break;
 315                         if (!autoinversion) break;
 316
 317                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 318                         fepriv->lnb_drift = -fepriv->lnb_drift;
 319                         ready = 1;
 320                         break;
 321
 322                 default:
 323                         fepriv->auto_step++;
 324                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 325                         break;
 326                 }
 327
 328                 if (!ready) fepriv->auto_sub_step++;
 329         }
 330
 331         /* if this attempt would hit where we started, indicate a complete
 332          * iteration has occurred */
 333         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 334             (fepriv->auto_sub_step == 0) && check_wrapped) {
 335                 return 1;
 336         }
 337
 338         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 339                 "auto_sub_step:%i started_auto_step:%i\n",
 340                 __func__, fepriv->lnb_drift, fepriv->inversion,
 341                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 342
 343         /* set the frontend itself */
 344         fepriv->parameters.frequency += fepriv->lnb_drift;
 345         if (autoinversion)
 346                 fepriv->parameters.inversion = fepriv->inversion;
 347         if (fe->ops.set_frontend)
 348                 fe->ops.set_frontend(fe, &fepriv->parameters);
 349
 350         fepriv->parameters.frequency = original_frequency;
 351         fepriv->parameters.inversion = original_inversion;
 352
 353         fepriv->auto_sub_step++;
 354         return 0;
 355 }
 356
 357 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 358 {
 359         fe_status_t s = 0;
 360         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 361
 362         /* if we've got no parameters, just keep idling */
 363         if (fepriv->state & FESTATE_IDLE) {
 364                 fepriv->delay = 3*HZ;
 365                 fepriv->quality = 0;
 366                 return;
 367         }
 368
 369         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 370         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 371                 if (fepriv->state & FESTATE_RETUNE) {
 372                         if (fe->ops.set_frontend)
 373                                 fe->ops.set_frontend(fe, &fepriv->parameters);
 374                         fepriv->state = FESTATE_TUNED;
 375                 }
 376                 fepriv->delay = 3*HZ;
 377                 fepriv->quality = 0;
 378                 return;
 379         }
 380
 381         /* get the frontend status */
 382         if (fepriv->state & FESTATE_RETUNE) {
 383                 s = 0;
 384         } else {
 385                 if (fe->ops.read_status)
 386                         fe->ops.read_status(fe, &s);
 387                 if (s != fepriv->status) {
 388                         dvb_frontend_add_event(fe, s);
 389                         fepriv->status = s;
 390                 }
 391         }
 392
 393         /* if we're not tuned, and we have a lock, move to the TUNED state */
 394         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 395                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 396                 fepriv->state = FESTATE_TUNED;
 397
 398                 /* if we're tuned, then we have determined the correct inversion */
 399                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 400                     (fepriv->parameters.inversion == INVERSION_AUTO)) {
 401                         fepriv->parameters.inversion = fepriv->inversion;
 402                 }
 403                 return;
 404         }
 405
 406         /* if we are tuned already, check we're still locked */
 407         if (fepriv->state & FESTATE_TUNED) {
 408                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 409
 410                 /* we're tuned, and the lock is still good... */
 411                 if (s & FE_HAS_LOCK) {
 412                         return;
 413                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 414                         fepriv->state = FESTATE_ZIGZAG_FAST;
 415                         fepriv->started_auto_step = fepriv->auto_step;
 416                         fepriv->check_wrapped = 0;
 417                 }
 418         }
 419
 420         /* don't actually do anything if we're in the LOSTLOCK state,
 421          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 422         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 423             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 424                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 425                 return;
 426         }
 427
 428         /* don't do anything if we're in the DISEQC state, since this
 429          * might be someone with a motorized dish controlled by DISEQC.
 430          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 431         if (fepriv->state & FESTATE_DISEQC) {
 432                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 433                 return;
 434         }
 435
 436         /* if we're in the RETUNE state, set everything up for a brand
 437          * new scan, keeping the current inversion setting, as the next
 438          * tune is _very_ likely to require the same */
 439         if (fepriv->state & FESTATE_RETUNE) {
 440                 fepriv->lnb_drift = 0;
 441                 fepriv->auto_step = 0;
 442                 fepriv->auto_sub_step = 0;
 443                 fepriv->started_auto_step = 0;
 444                 fepriv->check_wrapped = 0;
 445         }
 446
 447         /* fast zigzag. */
 448         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 449                 fepriv->delay = fepriv->min_delay;
 450
 451                 /* peform a tune */
 452                 if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) {
 453                         /* OK, if we've run out of trials at the fast speed.
 454                          * Drop back to slow for the _next_ attempt */
 455                         fepriv->state = FESTATE_SEARCHING_SLOW;
 456                         fepriv->started_auto_step = fepriv->auto_step;
 457                         return;
 458                 }
 459                 fepriv->check_wrapped = 1;
 460
 461                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 462                  * This ensures we cannot return from an
 463                  * FE_SET_FRONTEND ioctl before the first frontend tune
 464                  * occurs */
 465                 if (fepriv->state & FESTATE_RETUNE) {
 466                         fepriv->state = FESTATE_TUNING_FAST;
 467                 }
 468         }
 469
 470         /* slow zigzag */
 471         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 472                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 473
 474                 /* Note: don't bother checking for wrapping; we stay in this
 475                  * state until we get a lock */
 476                 dvb_frontend_swzigzag_autotune(fe, 0);
 477         }
 478 }
 479
 480 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 481 {
 482         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 483
 484         if (fepriv->exit)
 485                 return 1;
 486
 487         if (fepriv->dvbdev->writers == 1)
 488                 if (time_after(jiffies, fepriv->release_jiffies +
 489                                   dvb_shutdown_timeout * HZ))
 490                         return 1;
 491
 492         return 0;
 493 }
 494
 495 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 496 {
 497         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 498
 499         if (fepriv->wakeup) {
 500                 fepriv->wakeup = 0;
 501                 return 1;
 502         }
 503         return dvb_frontend_is_exiting(fe);
 504 }
 505
 506 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 507 {
 508         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 509
 510         fepriv->wakeup = 1;
 511         wake_up_interruptible(&fepriv->wait_queue);
 512 }
 513
 514 static int dvb_frontend_thread(void *data)
 515 {
 516         struct dvb_frontend *fe = data;
 517         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 518         unsigned long timeout;
 519         fe_status_t s;
 520         enum dvbfe_algo algo;
 521
 522         struct dvb_frontend_parameters *params;
 523
 524         dprintk("%s\n", __func__);
 525
 526         fepriv->check_wrapped = 0;
 527         fepriv->quality = 0;
 528         fepriv->delay = 3*HZ;
 529         fepriv->status = 0;
 530         fepriv->wakeup = 0;
 531         fepriv->reinitialise = 0;
 532
 533         dvb_frontend_init(fe);
 534
 535         set_freezable();
 536         while (1) {
 537                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 538 restart:
 539                 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
 540                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 541                                 || freezing(current),
 542                         fepriv->delay);
 543
 544                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 545                         /* got signal or quitting */
 546                         break;
 547                 }
 548
 549                 if (try_to_freeze())
 550                         goto restart;
 551
 552                 if (down_interruptible(&fepriv->sem))
 553                         break;
 554
 555                 if (fepriv->reinitialise) {
 556                         dvb_frontend_init(fe);
 557                         if (fepriv->tone != -1) {
 558                                 fe->ops.set_tone(fe, fepriv->tone);
 559                         }
 560                         if (fepriv->voltage != -1) {
 561                                 fe->ops.set_voltage(fe, fepriv->voltage);
 562                         }
 563                         fepriv->reinitialise = 0;
 564                 }
 565
 566                 /* do an iteration of the tuning loop */
 567                 if (fe->ops.get_frontend_algo) {
 568                         algo = fe->ops.get_frontend_algo(fe);
 569                         switch (algo) {
 570                         case DVBFE_ALGO_HW:
 571                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 572                                 params = NULL; /* have we been asked to RETUNE ? */
 573
 574                                 if (fepriv->state & FESTATE_RETUNE) {
 575                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 576                                         params = &fepriv->parameters;
 577                                         fepriv->state = FESTATE_TUNED;
 578                                 }
 579
 580                                 if (fe->ops.tune)
 581                                         fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
 582
 583                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 584                                         dprintk("%s: state changed, adding current state\n", __func__);
 585                                         dvb_frontend_add_event(fe, s);
 586                                         fepriv->status = s;
 587                                 }
 588                                 break;
 589                         case DVBFE_ALGO_SW:
 590                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 591                                 dvb_frontend_swzigzag(fe);
 592                                 break;
 593                         case DVBFE_ALGO_CUSTOM:
 594                                 params = NULL; /* have we been asked to RETUNE ?        */
 595                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 596                                 if (fepriv->state & FESTATE_RETUNE) {
 597                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 598                                         params = &fepriv->parameters;
 599                                         fepriv->state = FESTATE_TUNED;
 600                                 }
 601                                 /* Case where we are going to search for a carrier
 602                                  * User asked us to retune again for some reason, possibly
 603                                  * requesting a search with a new set of parameters
 604                                  */
 605                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 606                                         if (fe->ops.search) {
 607                                                 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
 608                                                 /* We did do a search as was requested, the flags are
 609                                                  * now unset as well and has the flags wrt to search.
 610                                                  */
 611                                         } else {
 612                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 613                                         }
 614                                 }
 615                                 /* Track the carrier if the search was successful */
 616                                 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
 617                                         if (fe->ops.track)
 618                                                 fe->ops.track(fe, &fepriv->parameters);
 619                                 } else {
 620                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 621                                         fepriv->delay = HZ / 2;
 622                                 }
 623                                 fe->ops.read_status(fe, &s);
 624                                 if (s != fepriv->status) {
 625                                         dvb_frontend_add_event(fe, s); /* update event list */
 626                                         fepriv->status = s;
 627                                         if (!(s & FE_HAS_LOCK)) {
 628                                                 fepriv->delay = HZ / 10;
 629                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 630                                         } else {
 631                                                 fepriv->delay = 60 * HZ;
 632                                         }
 633                                 }
 634                                 break;
 635                         default:
 636                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 637                                 break;
 638                         }
 639                 } else {
 640                         dvb_frontend_swzigzag(fe);
 641                 }
 642         }
 643
 644         if (dvb_powerdown_on_sleep) {
 645                 if (fe->ops.set_voltage)
 646                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 647                 if (fe->ops.tuner_ops.sleep) {
 648                         if (fe->ops.i2c_gate_ctrl)
 649                                 fe->ops.i2c_gate_ctrl(fe, 1);
 650                         fe->ops.tuner_ops.sleep(fe);
 651                         if (fe->ops.i2c_gate_ctrl)
 652                                 fe->ops.i2c_gate_ctrl(fe, 0);
 653                 }
 654                 if (fe->ops.sleep)
 655                         fe->ops.sleep(fe);
 656         }
 657
 658         fepriv->thread = NULL;
 659         mb();
 660
 661         dvb_frontend_wakeup(fe);
 662         return 0;
 663 }
 664
 665 static void dvb_frontend_stop(struct dvb_frontend *fe)
 666 {
 667         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 668
 669         dprintk ("%s\n", __func__);
 670
 671         fepriv->exit = 1;
 672         mb();
 673
 674         if (!fepriv->thread)
 675                 return;
 676
 677         kthread_stop(fepriv->thread);
 678
 679         init_MUTEX (&fepriv->sem);
 680         fepriv->state = FESTATE_IDLE;
 681
 682         /* paranoia check in case a signal arrived */
 683         if (fepriv->thread)
 684                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 685                                 fepriv->thread);
 686 }
 687
 688 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 689 {
 690         return ((curtime.tv_usec < lasttime.tv_usec) ?
 691                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 692                 curtime.tv_usec - lasttime.tv_usec);
 693 }
 694 EXPORT_SYMBOL(timeval_usec_diff);
 695
 696 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 697 {
 698         curtime->tv_usec += add_usec;
 699         if (curtime->tv_usec >= 1000000) {
 700                 curtime->tv_usec -= 1000000;
 701                 curtime->tv_sec++;
 702         }
 703 }
 704
 705 /*
 706  * Sleep until gettimeofday() > waketime + add_usec
 707  * This needs to be as precise as possible, but as the delay is
 708  * usually between 2ms and 32ms, it is done using a scheduled msleep
 709  * followed by usleep (normally a busy-wait loop) for the remainder
 710  */
 711 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 712 {
 713         struct timeval lasttime;
 714         s32 delta, newdelta;
 715
 716         timeval_usec_add(waketime, add_usec);
 717
 718         do_gettimeofday(&lasttime);
 719         delta = timeval_usec_diff(lasttime, *waketime);
 720         if (delta > 2500) {
 721                 msleep((delta - 1500) / 1000);
 722                 do_gettimeofday(&lasttime);
 723                 newdelta = timeval_usec_diff(lasttime, *waketime);
 724                 delta = (newdelta > delta) ? 0 : newdelta;
 725         }
 726         if (delta > 0)
 727                 udelay(delta);
 728 }
 729 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 730
 731 static int dvb_frontend_start(struct dvb_frontend *fe)
 732 {
 733         int ret;
 734         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 735         struct task_struct *fe_thread;
 736
 737         dprintk ("%s\n", __func__);
 738
 739         if (fepriv->thread) {
 740                 if (!fepriv->exit)
 741                         return 0;
 742                 else
 743                         dvb_frontend_stop (fe);
 744         }
 745
 746         if (signal_pending(current))
 747                 return -EINTR;
 748         if (down_interruptible (&fepriv->sem))
 749                 return -EINTR;
 750
 751         fepriv->state = FESTATE_IDLE;
 752         fepriv->exit = 0;
 753         fepriv->thread = NULL;
 754         mb();
 755
 756         fe_thread = kthread_run(dvb_frontend_thread, fe,
 757                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 758         if (IS_ERR(fe_thread)) {
 759                 ret = PTR_ERR(fe_thread);
 760                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 761                 up(&fepriv->sem);
 762                 return ret;
 763         }
 764         fepriv->thread = fe_thread;
 765         return 0;
 766 }
 767
 768 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
 769                                         u32 *freq_min, u32 *freq_max)
 770 {
 771         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 772
 773         if (fe->ops.info.frequency_max == 0)
 774                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 775         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 776                 *freq_max = fe->ops.info.frequency_max;
 777         else
 778                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 779
 780         if (*freq_min == 0 || *freq_max == 0)
 781                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 782                        fe->dvb->num,fe->id);
 783 }
 784
 785 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 786                                 struct dvb_frontend_parameters *parms)
 787 {
 788         u32 freq_min;
 789         u32 freq_max;
 790
 791         /* range check: frequency */
 792         dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
 793         if ((freq_min && parms->frequency < freq_min) ||
 794             (freq_max && parms->frequency > freq_max)) {
 795                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 796                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 797                 return -EINVAL;
 798         }
 799
 800         /* range check: symbol rate */
 801         if (fe->ops.info.type == FE_QPSK) {
 802                 if ((fe->ops.info.symbol_rate_min &&
 803                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 804                     (fe->ops.info.symbol_rate_max &&
 805                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 806                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 807                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 808                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 809                         return -EINVAL;
 810                 }
 811
 812         } else if (fe->ops.info.type == FE_QAM) {
 813                 if ((fe->ops.info.symbol_rate_min &&
 814                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 815                     (fe->ops.info.symbol_rate_max &&
 816                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 817                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 818                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 819                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 820                         return -EINVAL;
 821                 }
 822         }
 823
 824         return 0;
 825 }
 826
 827 static struct dtv_cmds_h dtv_cmds[] = {
 828         [DTV_TUNE] = {
 829                 .name   = "DTV_TUNE",
 830                 .cmd    = DTV_TUNE,
 831                 .set    = 1,
 832         },
 833         [DTV_CLEAR] = {
 834                 .name   = "DTV_CLEAR",
 835                 .cmd    = DTV_CLEAR,
 836                 .set    = 1,
 837         },
 838
 839         /* Set */
 840         [DTV_FREQUENCY] = {
 841                 .name   = "DTV_FREQUENCY",
 842                 .cmd    = DTV_FREQUENCY,
 843                 .set    = 1,
 844         },
 845         [DTV_BANDWIDTH_HZ] = {
 846                 .name   = "DTV_BANDWIDTH_HZ",
 847                 .cmd    = DTV_BANDWIDTH_HZ,
 848                 .set    = 1,
 849         },
 850         [DTV_MODULATION] = {
 851                 .name   = "DTV_MODULATION",
 852                 .cmd    = DTV_MODULATION,
 853                 .set    = 1,
 854         },
 855         [DTV_INVERSION] = {
 856                 .name   = "DTV_INVERSION",
 857                 .cmd    = DTV_INVERSION,
 858                 .set    = 1,
 859         },
 860         [DTV_DISEQC_MASTER] = {
 861                 .name   = "DTV_DISEQC_MASTER",
 862                 .cmd    = DTV_DISEQC_MASTER,
 863                 .set    = 1,
 864                 .buffer = 1,
 865         },
 866         [DTV_SYMBOL_RATE] = {
 867                 .name   = "DTV_SYMBOL_RATE",
 868                 .cmd    = DTV_SYMBOL_RATE,
 869                 .set    = 1,
 870         },
 871         [DTV_INNER_FEC] = {
 872                 .name   = "DTV_INNER_FEC",
 873                 .cmd    = DTV_INNER_FEC,
 874                 .set    = 1,
 875         },
 876         [DTV_VOLTAGE] = {
 877                 .name   = "DTV_VOLTAGE",
 878                 .cmd    = DTV_VOLTAGE,
 879                 .set    = 1,
 880         },
 881         [DTV_TONE] = {
 882                 .name   = "DTV_TONE",
 883                 .cmd    = DTV_TONE,
 884                 .set    = 1,
 885         },
 886         [DTV_PILOT] = {
 887                 .name   = "DTV_PILOT",
 888                 .cmd    = DTV_PILOT,
 889                 .set    = 1,
 890         },
 891         [DTV_ROLLOFF] = {
 892                 .name   = "DTV_ROLLOFF",
 893                 .cmd    = DTV_ROLLOFF,
 894                 .set    = 1,
 895         },
 896         [DTV_DELIVERY_SYSTEM] = {
 897                 .name   = "DTV_DELIVERY_SYSTEM",
 898                 .cmd    = DTV_DELIVERY_SYSTEM,
 899                 .set    = 1,
 900         },
 901         [DTV_HIERARCHY] = {
 902                 .name   = "DTV_HIERARCHY",
 903                 .cmd    = DTV_HIERARCHY,
 904                 .set    = 1,
 905         },
 906         [DTV_CODE_RATE_HP] = {
 907                 .name   = "DTV_CODE_RATE_HP",
 908                 .cmd    = DTV_CODE_RATE_HP,
 909                 .set    = 1,
 910         },
 911         [DTV_CODE_RATE_LP] = {
 912                 .name   = "DTV_CODE_RATE_LP",
 913                 .cmd    = DTV_CODE_RATE_LP,
 914                 .set    = 1,
 915         },
 916         [DTV_GUARD_INTERVAL] = {
 917                 .name   = "DTV_GUARD_INTERVAL",
 918                 .cmd    = DTV_GUARD_INTERVAL,
 919                 .set    = 1,
 920         },
 921         [DTV_TRANSMISSION_MODE] = {
 922                 .name   = "DTV_TRANSMISSION_MODE",
 923                 .cmd    = DTV_TRANSMISSION_MODE,
 924                 .set    = 1,
 925         },
 926         /* Get */
 927         [DTV_DISEQC_SLAVE_REPLY] = {
 928                 .name   = "DTV_DISEQC_SLAVE_REPLY",
 929                 .cmd    = DTV_DISEQC_SLAVE_REPLY,
 930                 .set    = 0,
 931                 .buffer = 1,
 932         },
 933         [DTV_API_VERSION] = {
 934                 .name   = "DTV_API_VERSION",
 935                 .cmd    = DTV_API_VERSION,
 936                 .set    = 0,
 937         },
 938         [DTV_CODE_RATE_HP] = {
 939                 .name   = "DTV_CODE_RATE_HP",
 940                 .cmd    = DTV_CODE_RATE_HP,
 941                 .set    = 0,
 942         },
 943         [DTV_CODE_RATE_LP] = {
 944                 .name   = "DTV_CODE_RATE_LP",
 945                 .cmd    = DTV_CODE_RATE_LP,
 946                 .set    = 0,
 947         },
 948         [DTV_GUARD_INTERVAL] = {
 949                 .name   = "DTV_GUARD_INTERVAL",
 950                 .cmd    = DTV_GUARD_INTERVAL,
 951                 .set    = 0,
 952         },
 953         [DTV_TRANSMISSION_MODE] = {
 954                 .name   = "DTV_TRANSMISSION_MODE",
 955                 .cmd    = DTV_TRANSMISSION_MODE,
 956                 .set    = 0,
 957         },
 958         [DTV_HIERARCHY] = {
 959                 .name   = "DTV_HIERARCHY",
 960                 .cmd    = DTV_HIERARCHY,
 961                 .set    = 0,
 962         },
 963 };
 964
 965 static void dtv_property_dump(struct dtv_property *tvp)
 966 {
 967         int i;
 968
 969         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 970                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 971                         __func__, tvp->cmd);
 972                 return;
 973         }
 974
 975         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 976                 ,__func__
 977                 ,tvp->cmd
 978                 ,dtv_cmds[ tvp->cmd ].name);
 979
 980         if(dtv_cmds[ tvp->cmd ].buffer) {
 981
 982                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 983                         ,__func__
 984                         ,tvp->u.buffer.len);
 985
 986                 for(i = 0; i < tvp->u.buffer.len; i++)
 987                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
 988                                 ,__func__
 989                                 ,i
 990                                 ,tvp->u.buffer.data[i]);
 991
 992         } else
 993                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
 994 }
 995
 996 static int is_legacy_delivery_system(fe_delivery_system_t s)
 997 {
 998         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
 999            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1000            (s == SYS_ATSC))
1001                 return 1;
1002
1003         return 0;
1004 }
1005
1006 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1007  * drivers can use a single set_frontend tuning function, regardless of whether
1008  * it's being used for the legacy or new API, reducing code and complexity.
1009  */
1010 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1011                                     struct dvb_frontend_parameters *p)
1012 {
1013         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1014
1015         c->frequency = p->frequency;
1016         c->inversion = p->inversion;
1017
1018         switch (fe->ops.info.type) {
1019         case FE_QPSK:
1020                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1021                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1022                 c->symbol_rate = p->u.qpsk.symbol_rate;
1023                 c->fec_inner = p->u.qpsk.fec_inner;
1024                 c->delivery_system = SYS_DVBS;
1025                 break;
1026         case FE_QAM:
1027                 c->symbol_rate = p->u.qam.symbol_rate;
1028                 c->fec_inner = p->u.qam.fec_inner;
1029                 c->modulation = p->u.qam.modulation;
1030                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1031                 break;
1032         case FE_OFDM:
1033                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1034                         c->bandwidth_hz = 6000000;
1035                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1036                         c->bandwidth_hz = 7000000;
1037                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1038                         c->bandwidth_hz = 8000000;
1039                 else
1040                         /* Including BANDWIDTH_AUTO */
1041                         c->bandwidth_hz = 0;
1042                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1043                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1044                 c->modulation = p->u.ofdm.constellation;
1045                 c->transmission_mode = p->u.ofdm.transmission_mode;
1046                 c->guard_interval = p->u.ofdm.guard_interval;
1047                 c->hierarchy = p->u.ofdm.hierarchy_information;
1048                 c->delivery_system = SYS_DVBT;
1049                 break;
1050         case FE_ATSC:
1051                 c->modulation = p->u.vsb.modulation;
1052                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1053                         c->delivery_system = SYS_ATSC;
1054                 else
1055                         c->delivery_system = SYS_DVBC_ANNEX_B;
1056                 break;
1057         }
1058 }
1059
1060 /* Ensure the cached values are set correctly in the frontend
1061  * legacy tuning structures, for the advanced tuning API.
1062  */
1063 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1064 {
1065         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1066         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1067         struct dvb_frontend_parameters *p = &fepriv->parameters;
1068
1069         p->frequency = c->frequency;
1070         p->inversion = c->inversion;
1071
1072         switch (fe->ops.info.type) {
1073         case FE_QPSK:
1074                 dprintk("%s() Preparing QPSK req\n", __func__);
1075                 p->u.qpsk.symbol_rate = c->symbol_rate;
1076                 p->u.qpsk.fec_inner = c->fec_inner;
1077                 c->delivery_system = SYS_DVBS;
1078                 break;
1079         case FE_QAM:
1080                 dprintk("%s() Preparing QAM req\n", __func__);
1081                 p->u.qam.symbol_rate = c->symbol_rate;
1082                 p->u.qam.fec_inner = c->fec_inner;
1083                 p->u.qam.modulation = c->modulation;
1084                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1085                 break;
1086         case FE_OFDM:
1087                 dprintk("%s() Preparing OFDM req\n", __func__);
1088                 if (c->bandwidth_hz == 6000000)
1089                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1090                 else if (c->bandwidth_hz == 7000000)
1091                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1092                 else if (c->bandwidth_hz == 8000000)
1093                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1094                 else
1095                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1096                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1097                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1098                 p->u.ofdm.constellation = c->modulation;
1099                 p->u.ofdm.transmission_mode = c->transmission_mode;
1100                 p->u.ofdm.guard_interval = c->guard_interval;
1101                 p->u.ofdm.hierarchy_information = c->hierarchy;
1102                 c->delivery_system = SYS_DVBT;
1103                 break;
1104         case FE_ATSC:
1105                 dprintk("%s() Preparing VSB req\n", __func__);
1106                 p->u.vsb.modulation = c->modulation;
1107                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1108                         c->delivery_system = SYS_ATSC;
1109                 else
1110                         c->delivery_system = SYS_DVBC_ANNEX_B;
1111                 break;
1112         }
1113 }
1114
1115 /* Ensure the cached values are set correctly in the frontend
1116  * legacy tuning structures, for the legacy tuning API.
1117  */
1118 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1119 {
1120         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1121         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1122         struct dvb_frontend_parameters *p = &fepriv->parameters;
1123
1124         p->frequency = c->frequency;
1125         p->inversion = c->inversion;
1126
1127         switch(c->modulation) {
1128         case PSK_8:
1129         case APSK_16:
1130         case APSK_32:
1131         case QPSK:
1132                 p->u.qpsk.symbol_rate = c->symbol_rate;
1133                 p->u.qpsk.fec_inner = c->fec_inner;
1134                 break;
1135         default:
1136                 break;
1137         }
1138
1139         if(c->delivery_system == SYS_ISDBT) {
1140                 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1141                 p->frequency = c->frequency;
1142                 p->inversion = INVERSION_AUTO;
1143                 p->u.ofdm.constellation = QAM_AUTO;
1144                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1145                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1146                 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1147                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1148                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1149                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1150         }
1151 }
1152
1153 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1154 {
1155         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1156
1157         /* For legacy delivery systems we don't need the delivery_system to
1158          * be specified, but we populate the older structures from the cache
1159          * so we can call set_frontend on older drivers.
1160          */
1161         if(is_legacy_delivery_system(c->delivery_system)) {
1162
1163                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1164                 dtv_property_legacy_params_sync(fe);
1165
1166         } else {
1167                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1168
1169                 /* For advanced delivery systems / modulation types ...
1170                  * we seed the lecacy dvb_frontend_parameters structure
1171                  * so that the sanity checking code later in the IOCTL processing
1172                  * can validate our basic frequency ranges, symbolrates, modulation
1173                  * etc.
1174                  */
1175                 dtv_property_adv_params_sync(fe);
1176         }
1177 }
1178
1179 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1180                         unsigned int cmd, void *parg);
1181 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1182                         unsigned int cmd, void *parg);
1183
1184 static int dtv_property_process_get(struct dvb_frontend *fe,
1185                                     struct dtv_property *tvp,
1186                                     struct inode *inode, struct file *file)
1187 {
1188         int r = 0;
1189
1190         dtv_property_dump(tvp);
1191
1192         /* Allow the frontend to validate incoming properties */
1193         if (fe->ops.get_property)
1194                 r = fe->ops.get_property(fe, tvp);
1195
1196         if (r < 0)
1197                 return r;
1198
1199         switch(tvp->cmd) {
1200         case DTV_FREQUENCY:
1201                 tvp->u.data = fe->dtv_property_cache.frequency;
1202                 break;
1203         case DTV_MODULATION:
1204                 tvp->u.data = fe->dtv_property_cache.modulation;
1205                 break;
1206         case DTV_BANDWIDTH_HZ:
1207                 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1208                 break;
1209         case DTV_INVERSION:
1210                 tvp->u.data = fe->dtv_property_cache.inversion;
1211                 break;
1212         case DTV_SYMBOL_RATE:
1213                 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1214                 break;
1215         case DTV_INNER_FEC:
1216                 tvp->u.data = fe->dtv_property_cache.fec_inner;
1217                 break;
1218         case DTV_PILOT:
1219                 tvp->u.data = fe->dtv_property_cache.pilot;
1220                 break;
1221         case DTV_ROLLOFF:
1222                 tvp->u.data = fe->dtv_property_cache.rolloff;
1223                 break;
1224         case DTV_DELIVERY_SYSTEM:
1225                 tvp->u.data = fe->dtv_property_cache.delivery_system;
1226                 break;
1227         case DTV_VOLTAGE:
1228                 tvp->u.data = fe->dtv_property_cache.voltage;
1229                 break;
1230         case DTV_TONE:
1231                 tvp->u.data = fe->dtv_property_cache.sectone;
1232                 break;
1233         case DTV_API_VERSION:
1234                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1235                 break;
1236         case DTV_CODE_RATE_HP:
1237                 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1238                 break;
1239         case DTV_CODE_RATE_LP:
1240                 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1241                 break;
1242         case DTV_GUARD_INTERVAL:
1243                 tvp->u.data = fe->dtv_property_cache.guard_interval;
1244                 break;
1245         case DTV_TRANSMISSION_MODE:
1246                 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1247                 break;
1248         case DTV_HIERARCHY:
1249                 tvp->u.data = fe->dtv_property_cache.hierarchy;
1250                 break;
1251         default:
1252                 r = -1;
1253         }
1254
1255         return r;
1256 }
1257
1258 static int dtv_property_process_set(struct dvb_frontend *fe,
1259                                     struct dtv_property *tvp,
1260                                     struct inode *inode,
1261                                     struct file *file)
1262 {
1263         int r = 0;
1264         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1265         dtv_property_dump(tvp);
1266
1267         /* Allow the frontend to validate incoming properties */
1268         if (fe->ops.set_property)
1269                 r = fe->ops.set_property(fe, tvp);
1270
1271         if (r < 0)
1272                 return r;
1273
1274         switch(tvp->cmd) {
1275         case DTV_CLEAR:
1276                 /* Reset a cache of data specific to the frontend here. This does
1277                  * not effect hardware.
1278                  */
1279                 dprintk("%s() Flushing property cache\n", __func__);
1280                 memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1281                 fe->dtv_property_cache.state = tvp->cmd;
1282                 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1283                 break;
1284         case DTV_TUNE:
1285                 /* interpret the cache of data, build either a traditional frontend
1286                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1287                  * ioctl.
1288                  */
1289                 fe->dtv_property_cache.state = tvp->cmd;
1290                 dprintk("%s() Finalised property cache\n", __func__);
1291                 dtv_property_cache_submit(fe);
1292
1293                 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1294                         &fepriv->parameters);
1295                 break;
1296         case DTV_FREQUENCY:
1297                 fe->dtv_property_cache.frequency = tvp->u.data;
1298                 break;
1299         case DTV_MODULATION:
1300                 fe->dtv_property_cache.modulation = tvp->u.data;
1301                 break;
1302         case DTV_BANDWIDTH_HZ:
1303                 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1304                 break;
1305         case DTV_INVERSION:
1306                 fe->dtv_property_cache.inversion = tvp->u.data;
1307                 break;
1308         case DTV_SYMBOL_RATE:
1309                 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1310                 break;
1311         case DTV_INNER_FEC:
1312                 fe->dtv_property_cache.fec_inner = tvp->u.data;
1313                 break;
1314         case DTV_PILOT:
1315                 fe->dtv_property_cache.pilot = tvp->u.data;
1316                 break;
1317         case DTV_ROLLOFF:
1318                 fe->dtv_property_cache.rolloff = tvp->u.data;
1319                 break;
1320         case DTV_DELIVERY_SYSTEM:
1321                 fe->dtv_property_cache.delivery_system = tvp->u.data;
1322                 break;
1323         case DTV_VOLTAGE:
1324                 fe->dtv_property_cache.voltage = tvp->u.data;
1325                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1326                         (void *)fe->dtv_property_cache.voltage);
1327                 break;
1328         case DTV_TONE:
1329                 fe->dtv_property_cache.sectone = tvp->u.data;
1330                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1331                         (void *)fe->dtv_property_cache.sectone);
1332                 break;
1333         case DTV_CODE_RATE_HP:
1334                 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1335                 break;
1336         case DTV_CODE_RATE_LP:
1337                 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1338                 break;
1339         case DTV_GUARD_INTERVAL:
1340                 fe->dtv_property_cache.guard_interval = tvp->u.data;
1341                 break;
1342         case DTV_TRANSMISSION_MODE:
1343                 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1344                 break;
1345         case DTV_HIERARCHY:
1346                 fe->dtv_property_cache.hierarchy = tvp->u.data;
1347                 break;
1348         default:
1349                 r = -1;
1350         }
1351
1352         return r;
1353 }
1354
1355 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1356                         unsigned int cmd, void *parg)
1357 {
1358         struct dvb_device *dvbdev = file->private_data;
1359         struct dvb_frontend *fe = dvbdev->priv;
1360         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1361         int err = -EOPNOTSUPP;
1362
1363         dprintk ("%s\n", __func__);
1364
1365         if (fepriv->exit)
1366                 return -ENODEV;
1367
1368         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1369             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1370              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1371                 return -EPERM;
1372
1373         if (down_interruptible (&fepriv->sem))
1374                 return -ERESTARTSYS;
1375
1376         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1377                 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1378         else {
1379                 fe->dtv_property_cache.state = DTV_UNDEFINED;
1380                 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1381         }
1382
1383         up(&fepriv->sem);
1384         return err;
1385 }
1386
1387 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1388                         unsigned int cmd, void *parg)
1389 {
1390         struct dvb_device *dvbdev = file->private_data;
1391         struct dvb_frontend *fe = dvbdev->priv;
1392         int err = 0;
1393
1394         struct dtv_properties *tvps = NULL;
1395         struct dtv_property *tvp = NULL;
1396         int i;
1397
1398         dprintk("%s\n", __func__);
1399
1400         if(cmd == FE_SET_PROPERTY) {
1401                 tvps = (struct dtv_properties __user *)parg;
1402
1403                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1404                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1405
1406                 /* Put an arbitrary limit on the number of messages that can
1407                  * be sent at once */
1408                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1409                         return -EINVAL;
1410
1411                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1412                         sizeof(struct dtv_property), GFP_KERNEL);
1413                 if (!tvp) {
1414                         err = -ENOMEM;
1415                         goto out;
1416                 }
1417
1418                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1419                         err = -EFAULT;
1420                         goto out;
1421                 }
1422
1423                 for (i = 0; i < tvps->num; i++) {
1424                         (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1425                         err |= (tvp + i)->result;
1426                 }
1427
1428                 if(fe->dtv_property_cache.state == DTV_TUNE)
1429                         dprintk("%s() Property cache is full, tuning\n", __func__);
1430
1431         } else
1432         if(cmd == FE_GET_PROPERTY) {
1433
1434                 tvps = (struct dtv_properties __user *)parg;
1435
1436                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1437                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1438
1439                 /* Put an arbitrary limit on the number of messages that can
1440                  * be sent at once */
1441                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1442                         return -EINVAL;
1443
1444                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1445                         sizeof(struct dtv_property), GFP_KERNEL);
1446                 if (!tvp) {
1447                         err = -ENOMEM;
1448                         goto out;
1449                 }
1450
1451                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1452                         err = -EFAULT;
1453                         goto out;
1454                 }
1455
1456                 for (i = 0; i < tvps->num; i++) {
1457                         (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1458                         err |= (tvp + i)->result;
1459                 }
1460
1461                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1462                         err = -EFAULT;
1463                         goto out;
1464                 }
1465
1466         } else
1467                 err = -EOPNOTSUPP;
1468
1469 out:
1470         kfree(tvp);
1471         return err;
1472 }
1473
1474 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1475                         unsigned int cmd, void *parg)
1476 {
1477         struct dvb_device *dvbdev = file->private_data;
1478         struct dvb_frontend *fe = dvbdev->priv;
1479         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1480         int err = -EOPNOTSUPP;
1481
1482         switch (cmd) {
1483         case FE_GET_INFO: {
1484                 struct dvb_frontend_info* info = parg;
1485                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1486                 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1487
1488                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1489                  * do it, it is done for it. */
1490                 info->caps |= FE_CAN_INVERSION_AUTO;
1491                 err = 0;
1492                 break;
1493         }
1494
1495         case FE_READ_STATUS: {
1496                 fe_status_t* status = parg;
1497
1498                 /* if retune was requested but hasn't occured yet, prevent
1499                  * that user get signal state from previous tuning */
1500                 if(fepriv->state == FESTATE_RETUNE) {
1501                         err=0;
1502                         *status = 0;
1503                         break;
1504                 }
1505
1506                 if (fe->ops.read_status)
1507                         err = fe->ops.read_status(fe, status);
1508                 break;
1509         }
1510         case FE_READ_BER:
1511                 if (fe->ops.read_ber)
1512                         err = fe->ops.read_ber(fe, (__u32*) parg);
1513                 break;
1514
1515         case FE_READ_SIGNAL_STRENGTH:
1516                 if (fe->ops.read_signal_strength)
1517                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1518                 break;
1519
1520         case FE_READ_SNR:
1521                 if (fe->ops.read_snr)
1522                         err = fe->ops.read_snr(fe, (__u16*) parg);
1523                 break;
1524
1525         case FE_READ_UNCORRECTED_BLOCKS:
1526                 if (fe->ops.read_ucblocks)
1527                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1528                 break;
1529
1530
1531         case FE_DISEQC_RESET_OVERLOAD:
1532                 if (fe->ops.diseqc_reset_overload) {
1533                         err = fe->ops.diseqc_reset_overload(fe);
1534                         fepriv->state = FESTATE_DISEQC;
1535                         fepriv->status = 0;
1536                 }
1537                 break;
1538
1539         case FE_DISEQC_SEND_MASTER_CMD:
1540                 if (fe->ops.diseqc_send_master_cmd) {
1541                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1542                         fepriv->state = FESTATE_DISEQC;
1543                         fepriv->status = 0;
1544                 }
1545                 break;
1546
1547         case FE_DISEQC_SEND_BURST:
1548                 if (fe->ops.diseqc_send_burst) {
1549                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1550                         fepriv->state = FESTATE_DISEQC;
1551                         fepriv->status = 0;
1552                 }
1553                 break;
1554
1555         case FE_SET_TONE:
1556                 if (fe->ops.set_tone) {
1557                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1558                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1559                         fepriv->state = FESTATE_DISEQC;
1560                         fepriv->status = 0;
1561                 }
1562                 break;
1563
1564         case FE_SET_VOLTAGE:
1565                 if (fe->ops.set_voltage) {
1566                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1567                         fepriv->voltage = (fe_sec_voltage_t) parg;
1568                         fepriv->state = FESTATE_DISEQC;
1569                         fepriv->status = 0;
1570                 }
1571                 break;
1572
1573         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1574                 if (fe->ops.dishnetwork_send_legacy_command) {
1575                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1576                         fepriv->state = FESTATE_DISEQC;
1577                         fepriv->status = 0;
1578                 } else if (fe->ops.set_voltage) {
1579                         /*
1580                          * NOTE: This is a fallback condition.  Some frontends
1581                          * (stv0299 for instance) take longer than 8msec to
1582                          * respond to a set_voltage command.  Those switches
1583                          * need custom routines to switch properly.  For all
1584                          * other frontends, the following shoule work ok.
1585                          * Dish network legacy switches (as used by Dish500)
1586                          * are controlled by sending 9-bit command words
1587                          * spaced 8msec apart.
1588                          * the actual command word is switch/port dependant
1589                          * so it is up to the userspace application to send
1590                          * the right command.
1591                          * The command must always start with a '0' after
1592                          * initialization, so parg is 8 bits and does not
1593                          * include the initialization or start bit
1594                          */
1595                         unsigned long swcmd = ((unsigned long) parg) << 1;
1596                         struct timeval nexttime;
1597                         struct timeval tv[10];
1598                         int i;
1599                         u8 last = 1;
1600                         if (dvb_frontend_debug)
1601                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1602                         do_gettimeofday(&nexttime);
1603                         if (dvb_frontend_debug)
1604                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1605                         /* before sending a command, initialize by sending
1606                          * a 32ms 18V to the switch
1607                          */
1608                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1609                         dvb_frontend_sleep_until(&nexttime, 32000);
1610
1611                         for (i = 0; i < 9; i++) {
1612                                 if (dvb_frontend_debug)
1613                                         do_gettimeofday(&tv[i + 1]);
1614                                 if ((swcmd & 0x01) != last) {
1615                                         /* set voltage to (last ? 13V : 18V) */
1616                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1617                                         last = (last) ? 0 : 1;
1618                                 }
1619                                 swcmd = swcmd >> 1;
1620                                 if (i != 8)
1621                                         dvb_frontend_sleep_until(&nexttime, 8000);
1622                         }
1623                         if (dvb_frontend_debug) {
1624                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1625                                         __func__, fe->dvb->num);
1626                                 for (i = 1; i < 10; i++)
1627                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1628                         }
1629                         err = 0;
1630                         fepriv->state = FESTATE_DISEQC;
1631                         fepriv->status = 0;
1632                 }
1633                 break;
1634
1635         case FE_DISEQC_RECV_SLAVE_REPLY:
1636                 if (fe->ops.diseqc_recv_slave_reply)
1637                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1638                 break;
1639
1640         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1641                 if (fe->ops.enable_high_lnb_voltage)
1642                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1643                 break;
1644
1645         case FE_SET_FRONTEND: {
1646                 struct dvb_frontend_tune_settings fetunesettings;
1647
1648                 if(fe->dtv_property_cache.state == DTV_TUNE) {
1649                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1650                                 err = -EINVAL;
1651                                 break;
1652                         }
1653                 } else {
1654                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1655                                 err = -EINVAL;
1656                                 break;
1657                         }
1658
1659                         memcpy (&fepriv->parameters, parg,
1660                                 sizeof (struct dvb_frontend_parameters));
1661                         dtv_property_cache_sync(fe, &fepriv->parameters);
1662                 }
1663
1664                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1665                 memcpy(&fetunesettings.parameters, parg,
1666                        sizeof (struct dvb_frontend_parameters));
1667
1668                 /* force auto frequency inversion if requested */
1669                 if (dvb_force_auto_inversion) {
1670                         fepriv->parameters.inversion = INVERSION_AUTO;
1671                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1672                 }
1673                 if (fe->ops.info.type == FE_OFDM) {
1674                         /* without hierarchical coding code_rate_LP is irrelevant,
1675                          * so we tolerate the otherwise invalid FEC_NONE setting */
1676                         if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1677                             fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1678                                 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1679                 }
1680
1681                 /* get frontend-specific tuning settings */
1682                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1683                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1684                         fepriv->max_drift = fetunesettings.max_drift;
1685                         fepriv->step_size = fetunesettings.step_size;
1686                 } else {
1687                         /* default values */
1688                         switch(fe->ops.info.type) {
1689                         case FE_QPSK:
1690                                 fepriv->min_delay = HZ/20;
1691                                 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1692                                 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1693                                 break;
1694
1695                         case FE_QAM:
1696                                 fepriv->min_delay = HZ/20;
1697                                 fepriv->step_size = 0; /* no zigzag */
1698                                 fepriv->max_drift = 0;
1699                                 break;
1700
1701                         case FE_OFDM:
1702                                 fepriv->min_delay = HZ/20;
1703                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1704                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1705                                 break;
1706                         case FE_ATSC:
1707                                 fepriv->min_delay = HZ/20;
1708                                 fepriv->step_size = 0;
1709                                 fepriv->max_drift = 0;
1710                                 break;
1711                         }
1712                 }
1713                 if (dvb_override_tune_delay > 0)
1714                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1715
1716                 fepriv->state = FESTATE_RETUNE;
1717
1718                 /* Request the search algorithm to search */
1719                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1720
1721                 dvb_frontend_wakeup(fe);
1722                 dvb_frontend_add_event(fe, 0);
1723                 fepriv->status = 0;
1724                 err = 0;
1725                 break;
1726         }
1727
1728         case FE_GET_EVENT:
1729                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1730                 break;
1731
1732         case FE_GET_FRONTEND:
1733                 if (fe->ops.get_frontend) {
1734                         memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1735                         err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1736                 }
1737                 break;
1738
1739         case FE_SET_FRONTEND_TUNE_MODE:
1740                 fepriv->tune_mode_flags = (unsigned long) parg;
1741                 err = 0;
1742                 break;
1743         };
1744
1745         return err;
1746 }
1747
1748
1749 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1750 {
1751         struct dvb_device *dvbdev = file->private_data;
1752         struct dvb_frontend *fe = dvbdev->priv;
1753         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1754
1755         dprintk ("%s\n", __func__);
1756
1757         poll_wait (file, &fepriv->events.wait_queue, wait);
1758
1759         if (fepriv->events.eventw != fepriv->events.eventr)
1760                 return (POLLIN | POLLRDNORM | POLLPRI);
1761
1762         return 0;
1763 }
1764
1765 static int dvb_frontend_open(struct inode *inode, struct file *file)
1766 {
1767         struct dvb_device *dvbdev = file->private_data;
1768         struct dvb_frontend *fe = dvbdev->priv;
1769         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1770         struct dvb_adapter *adapter = fe->dvb;
1771         int ret;
1772
1773         dprintk ("%s\n", __func__);
1774
1775         if (adapter->mfe_shared) {
1776                 mutex_lock (&adapter->mfe_lock);
1777
1778                 if (adapter->mfe_dvbdev == NULL)
1779                         adapter->mfe_dvbdev = dvbdev;
1780
1781                 else if (adapter->mfe_dvbdev != dvbdev) {
1782                         struct dvb_device
1783                                 *mfedev = adapter->mfe_dvbdev;
1784                         struct dvb_frontend
1785                                 *mfe = mfedev->priv;
1786                         struct dvb_frontend_private
1787                                 *mfepriv = mfe->frontend_priv;
1788                         int mferetry = (dvb_mfe_wait_time << 1);
1789
1790                         mutex_unlock (&adapter->mfe_lock);
1791                         while (mferetry-- && (mfedev->users != -1 ||
1792                                         mfepriv->thread != NULL)) {
1793                                 if(msleep_interruptible(500)) {
1794                                         if(signal_pending(current))
1795                                                 return -EINTR;
1796                                 }
1797                         }
1798
1799                         mutex_lock (&adapter->mfe_lock);
1800                         if(adapter->mfe_dvbdev != dvbdev) {
1801                                 mfedev = adapter->mfe_dvbdev;
1802                                 mfe = mfedev->priv;
1803                                 mfepriv = mfe->frontend_priv;
1804                                 if (mfedev->users != -1 ||
1805                                                 mfepriv->thread != NULL) {
1806                                         mutex_unlock (&adapter->mfe_lock);
1807                                         return -EBUSY;
1808                                 }
1809                                 adapter->mfe_dvbdev = dvbdev;
1810                         }
1811                 }
1812         }
1813
1814         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1815                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1816                         goto err0;
1817         }
1818
1819         if ((ret = dvb_generic_open (inode, file)) < 0)
1820                 goto err1;
1821
1822         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1823                 /* normal tune mode when opened R/W */
1824                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1825                 fepriv->tone = -1;
1826                 fepriv->voltage = -1;
1827
1828                 ret = dvb_frontend_start (fe);
1829                 if (ret)
1830                         goto err2;
1831
1832                 /*  empty event queue */
1833                 fepriv->events.eventr = fepriv->events.eventw = 0;
1834         }
1835
1836         if (adapter->mfe_shared)
1837                 mutex_unlock (&adapter->mfe_lock);
1838         return ret;
1839
1840 err2:
1841         dvb_generic_release(inode, file);
1842 err1:
1843         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1844                 fe->ops.ts_bus_ctrl(fe, 0);
1845 err0:
1846         if (adapter->mfe_shared)
1847                 mutex_unlock (&adapter->mfe_lock);
1848         return ret;
1849 }
1850
1851 static int dvb_frontend_release(struct inode *inode, struct file *file)
1852 {
1853         struct dvb_device *dvbdev = file->private_data;
1854         struct dvb_frontend *fe = dvbdev->priv;
1855         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1856         int ret;
1857
1858         dprintk ("%s\n", __func__);
1859
1860         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
1861                 fepriv->release_jiffies = jiffies;
1862
1863         ret = dvb_generic_release (inode, file);
1864
1865         if (dvbdev->users == -1) {
1866                 if (fepriv->exit == 1) {
1867                         fops_put(file->f_op);
1868                         file->f_op = NULL;
1869                         wake_up(&dvbdev->wait_queue);
1870                 }
1871                 if (fe->ops.ts_bus_ctrl)
1872                         fe->ops.ts_bus_ctrl(fe, 0);
1873         }
1874
1875         return ret;
1876 }
1877
1878 static struct file_operations dvb_frontend_fops = {
1879         .owner          = THIS_MODULE,
1880         .ioctl          = dvb_generic_ioctl,
1881         .poll           = dvb_frontend_poll,
1882         .open           = dvb_frontend_open,
1883         .release        = dvb_frontend_release
1884 };
1885
1886 int dvb_register_frontend(struct dvb_adapter* dvb,
1887                           struct dvb_frontend* fe)
1888 {
1889         struct dvb_frontend_private *fepriv;
1890         static const struct dvb_device dvbdev_template = {
1891                 .users = ~0,
1892                 .writers = 1,
1893                 .readers = (~0)-1,
1894                 .fops = &dvb_frontend_fops,
1895                 .kernel_ioctl = dvb_frontend_ioctl
1896         };
1897
1898         dprintk ("%s\n", __func__);
1899
1900         if (mutex_lock_interruptible(&frontend_mutex))
1901                 return -ERESTARTSYS;
1902
1903         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
1904         if (fe->frontend_priv == NULL) {
1905                 mutex_unlock(&frontend_mutex);
1906                 return -ENOMEM;
1907         }
1908         fepriv = fe->frontend_priv;
1909
1910         init_MUTEX (&fepriv->sem);
1911         init_waitqueue_head (&fepriv->wait_queue);
1912         init_waitqueue_head (&fepriv->events.wait_queue);
1913         mutex_init(&fepriv->events.mtx);
1914         fe->dvb = dvb;
1915         fepriv->inversion = INVERSION_OFF;
1916
1917         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
1918                 fe->dvb->num,
1919                 fe->id,
1920                 fe->ops.info.name);
1921
1922         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
1923                              fe, DVB_DEVICE_FRONTEND);
1924
1925         mutex_unlock(&frontend_mutex);
1926         return 0;
1927 }
1928 EXPORT_SYMBOL(dvb_register_frontend);
1929
1930 int dvb_unregister_frontend(struct dvb_frontend* fe)
1931 {
1932         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1933         dprintk ("%s\n", __func__);
1934
1935         mutex_lock(&frontend_mutex);
1936         dvb_frontend_stop (fe);
1937         mutex_unlock(&frontend_mutex);
1938
1939         if (fepriv->dvbdev->users < -1)
1940                 wait_event(fepriv->dvbdev->wait_queue,
1941                                 fepriv->dvbdev->users==-1);
1942
1943         mutex_lock(&frontend_mutex);
1944         dvb_unregister_device (fepriv->dvbdev);
1945
1946         /* fe is invalid now */
1947         kfree(fepriv);
1948         mutex_unlock(&frontend_mutex);
1949         return 0;
1950 }
1951 EXPORT_SYMBOL(dvb_unregister_frontend);
1952
1953 #ifdef CONFIG_MEDIA_ATTACH
1954 void dvb_frontend_detach(struct dvb_frontend* fe)
1955 {
1956         void *ptr;
1957
1958         if (fe->ops.release_sec) {
1959                 fe->ops.release_sec(fe);
1960                 symbol_put_addr(fe->ops.release_sec);
1961         }
1962         if (fe->ops.tuner_ops.release) {
1963                 fe->ops.tuner_ops.release(fe);
1964                 symbol_put_addr(fe->ops.tuner_ops.release);
1965         }
1966         if (fe->ops.analog_ops.release) {
1967                 fe->ops.analog_ops.release(fe);
1968                 symbol_put_addr(fe->ops.analog_ops.release);
1969         }
1970         ptr = (void*)fe->ops.release;
1971         if (ptr) {
1972                 fe->ops.release(fe);
1973                 symbol_put_addr(ptr);
1974         }
1975 }
1976 #else
1977 void dvb_frontend_detach(struct dvb_frontend* fe)
1978 {
1979         if (fe->ops.release_sec)
1980                 fe->ops.release_sec(fe);
1981         if (fe->ops.tuner_ops.release)
1982                 fe->ops.tuner_ops.release(fe);
1983         if (fe->ops.analog_ops.release)
1984                 fe->ops.analog_ops.release(fe);
1985         if (fe->ops.release)
1986                 fe->ops.release(fe);
1987 }
1988 #endif
1989 EXPORT_SYMBOL(dvb_frontend_detach);