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                         fepriv->exit = 1;
 547                         break;
 548                 }
 549
 550                 if (try_to_freeze())
 551                         goto restart;
 552
 553                 if (down_interruptible(&fepriv->sem))
 554                         break;
 555
 556                 if (fepriv->reinitialise) {
 557                         dvb_frontend_init(fe);
 558                         if (fepriv->tone != -1) {
 559                                 fe->ops.set_tone(fe, fepriv->tone);
 560                         }
 561                         if (fepriv->voltage != -1) {
 562                                 fe->ops.set_voltage(fe, fepriv->voltage);
 563                         }
 564                         fepriv->reinitialise = 0;
 565                 }
 566
 567                 /* do an iteration of the tuning loop */
 568                 if (fe->ops.get_frontend_algo) {
 569                         algo = fe->ops.get_frontend_algo(fe);
 570                         switch (algo) {
 571                         case DVBFE_ALGO_HW:
 572                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 573                                 params = NULL; /* have we been asked to RETUNE ? */
 574
 575                                 if (fepriv->state & FESTATE_RETUNE) {
 576                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 577                                         params = &fepriv->parameters;
 578                                         fepriv->state = FESTATE_TUNED;
 579                                 }
 580
 581                                 if (fe->ops.tune)
 582                                         fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
 583
 584                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 585                                         dprintk("%s: state changed, adding current state\n", __func__);
 586                                         dvb_frontend_add_event(fe, s);
 587                                         fepriv->status = s;
 588                                 }
 589                                 break;
 590                         case DVBFE_ALGO_SW:
 591                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 592                                 dvb_frontend_swzigzag(fe);
 593                                 break;
 594                         case DVBFE_ALGO_CUSTOM:
 595                                 params = NULL; /* have we been asked to RETUNE ?        */
 596                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 597                                 if (fepriv->state & FESTATE_RETUNE) {
 598                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 599                                         params = &fepriv->parameters;
 600                                         fepriv->state = FESTATE_TUNED;
 601                                 }
 602                                 /* Case where we are going to search for a carrier
 603                                  * User asked us to retune again for some reason, possibly
 604                                  * requesting a search with a new set of parameters
 605                                  */
 606                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 607                                         if (fe->ops.search) {
 608                                                 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
 609                                                 /* We did do a search as was requested, the flags are
 610                                                  * now unset as well and has the flags wrt to search.
 611                                                  */
 612                                         } else {
 613                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 614                                         }
 615                                 }
 616                                 /* Track the carrier if the search was successful */
 617                                 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
 618                                         if (fe->ops.track)
 619                                                 fe->ops.track(fe, &fepriv->parameters);
 620                                 } else {
 621                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 622                                         fepriv->delay = HZ / 2;
 623                                 }
 624                                 fe->ops.read_status(fe, &s);
 625                                 if (s != fepriv->status) {
 626                                         dvb_frontend_add_event(fe, s); /* update event list */
 627                                         fepriv->status = s;
 628                                         if (!(s & FE_HAS_LOCK)) {
 629                                                 fepriv->delay = HZ / 10;
 630                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 631                                         } else {
 632                                                 fepriv->delay = 60 * HZ;
 633                                         }
 634                                 }
 635                                 break;
 636                         default:
 637                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 638                                 break;
 639                         }
 640                 } else {
 641                         dvb_frontend_swzigzag(fe);
 642                 }
 643         }
 644
 645         if (dvb_powerdown_on_sleep) {
 646                 if (fe->ops.set_voltage)
 647                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 648                 if (fe->ops.tuner_ops.sleep) {
 649                         if (fe->ops.i2c_gate_ctrl)
 650                                 fe->ops.i2c_gate_ctrl(fe, 1);
 651                         fe->ops.tuner_ops.sleep(fe);
 652                         if (fe->ops.i2c_gate_ctrl)
 653                                 fe->ops.i2c_gate_ctrl(fe, 0);
 654                 }
 655                 if (fe->ops.sleep)
 656                         fe->ops.sleep(fe);
 657         }
 658
 659         fepriv->thread = NULL;
 660         fepriv->exit = 0;
 661         mb();
 662
 663         dvb_frontend_wakeup(fe);
 664         return 0;
 665 }
 666
 667 static void dvb_frontend_stop(struct dvb_frontend *fe)
 668 {
 669         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 670
 671         dprintk ("%s\n", __func__);
 672
 673         fepriv->exit = 1;
 674         mb();
 675
 676         if (!fepriv->thread)
 677                 return;
 678
 679         kthread_stop(fepriv->thread);
 680
 681         init_MUTEX (&fepriv->sem);
 682         fepriv->state = FESTATE_IDLE;
 683
 684         /* paranoia check in case a signal arrived */
 685         if (fepriv->thread)
 686                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 687                                 fepriv->thread);
 688 }
 689
 690 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 691 {
 692         return ((curtime.tv_usec < lasttime.tv_usec) ?
 693                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 694                 curtime.tv_usec - lasttime.tv_usec);
 695 }
 696 EXPORT_SYMBOL(timeval_usec_diff);
 697
 698 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 699 {
 700         curtime->tv_usec += add_usec;
 701         if (curtime->tv_usec >= 1000000) {
 702                 curtime->tv_usec -= 1000000;
 703                 curtime->tv_sec++;
 704         }
 705 }
 706
 707 /*
 708  * Sleep until gettimeofday() > waketime + add_usec
 709  * This needs to be as precise as possible, but as the delay is
 710  * usually between 2ms and 32ms, it is done using a scheduled msleep
 711  * followed by usleep (normally a busy-wait loop) for the remainder
 712  */
 713 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 714 {
 715         struct timeval lasttime;
 716         s32 delta, newdelta;
 717
 718         timeval_usec_add(waketime, add_usec);
 719
 720         do_gettimeofday(&lasttime);
 721         delta = timeval_usec_diff(lasttime, *waketime);
 722         if (delta > 2500) {
 723                 msleep((delta - 1500) / 1000);
 724                 do_gettimeofday(&lasttime);
 725                 newdelta = timeval_usec_diff(lasttime, *waketime);
 726                 delta = (newdelta > delta) ? 0 : newdelta;
 727         }
 728         if (delta > 0)
 729                 udelay(delta);
 730 }
 731 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 732
 733 static int dvb_frontend_start(struct dvb_frontend *fe)
 734 {
 735         int ret;
 736         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 737         struct task_struct *fe_thread;
 738
 739         dprintk ("%s\n", __func__);
 740
 741         if (fepriv->thread) {
 742                 if (!fepriv->exit)
 743                         return 0;
 744                 else
 745                         dvb_frontend_stop (fe);
 746         }
 747
 748         if (signal_pending(current))
 749                 return -EINTR;
 750         if (down_interruptible (&fepriv->sem))
 751                 return -EINTR;
 752
 753         fepriv->state = FESTATE_IDLE;
 754         fepriv->exit = 0;
 755         fepriv->thread = NULL;
 756         mb();
 757
 758         fe_thread = kthread_run(dvb_frontend_thread, fe,
 759                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 760         if (IS_ERR(fe_thread)) {
 761                 ret = PTR_ERR(fe_thread);
 762                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 763                 up(&fepriv->sem);
 764                 return ret;
 765         }
 766         fepriv->thread = fe_thread;
 767         return 0;
 768 }
 769
 770 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
 771                                         u32 *freq_min, u32 *freq_max)
 772 {
 773         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 774
 775         if (fe->ops.info.frequency_max == 0)
 776                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 777         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 778                 *freq_max = fe->ops.info.frequency_max;
 779         else
 780                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 781
 782         if (*freq_min == 0 || *freq_max == 0)
 783                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 784                        fe->dvb->num,fe->id);
 785 }
 786
 787 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 788                                 struct dvb_frontend_parameters *parms)
 789 {
 790         u32 freq_min;
 791         u32 freq_max;
 792
 793         /* range check: frequency */
 794         dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
 795         if ((freq_min && parms->frequency < freq_min) ||
 796             (freq_max && parms->frequency > freq_max)) {
 797                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 798                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 799                 return -EINVAL;
 800         }
 801
 802         /* range check: symbol rate */
 803         if (fe->ops.info.type == FE_QPSK) {
 804                 if ((fe->ops.info.symbol_rate_min &&
 805                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 806                     (fe->ops.info.symbol_rate_max &&
 807                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 808                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 809                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 810                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 811                         return -EINVAL;
 812                 }
 813
 814         } else if (fe->ops.info.type == FE_QAM) {
 815                 if ((fe->ops.info.symbol_rate_min &&
 816                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 817                     (fe->ops.info.symbol_rate_max &&
 818                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 819                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 820                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 821                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 822                         return -EINVAL;
 823                 }
 824         }
 825
 826         return 0;
 827 }
 828
 829 static struct dtv_cmds_h dtv_cmds[] = {
 830         [DTV_TUNE] = {
 831                 .name   = "DTV_TUNE",
 832                 .cmd    = DTV_TUNE,
 833                 .set    = 1,
 834         },
 835         [DTV_CLEAR] = {
 836                 .name   = "DTV_CLEAR",
 837                 .cmd    = DTV_CLEAR,
 838                 .set    = 1,
 839         },
 840
 841         /* Set */
 842         [DTV_FREQUENCY] = {
 843                 .name   = "DTV_FREQUENCY",
 844                 .cmd    = DTV_FREQUENCY,
 845                 .set    = 1,
 846         },
 847         [DTV_BANDWIDTH_HZ] = {
 848                 .name   = "DTV_BANDWIDTH_HZ",
 849                 .cmd    = DTV_BANDWIDTH_HZ,
 850                 .set    = 1,
 851         },
 852         [DTV_MODULATION] = {
 853                 .name   = "DTV_MODULATION",
 854                 .cmd    = DTV_MODULATION,
 855                 .set    = 1,
 856         },
 857         [DTV_INVERSION] = {
 858                 .name   = "DTV_INVERSION",
 859                 .cmd    = DTV_INVERSION,
 860                 .set    = 1,
 861         },
 862         [DTV_DISEQC_MASTER] = {
 863                 .name   = "DTV_DISEQC_MASTER",
 864                 .cmd    = DTV_DISEQC_MASTER,
 865                 .set    = 1,
 866                 .buffer = 1,
 867         },
 868         [DTV_SYMBOL_RATE] = {
 869                 .name   = "DTV_SYMBOL_RATE",
 870                 .cmd    = DTV_SYMBOL_RATE,
 871                 .set    = 1,
 872         },
 873         [DTV_INNER_FEC] = {
 874                 .name   = "DTV_INNER_FEC",
 875                 .cmd    = DTV_INNER_FEC,
 876                 .set    = 1,
 877         },
 878         [DTV_VOLTAGE] = {
 879                 .name   = "DTV_VOLTAGE",
 880                 .cmd    = DTV_VOLTAGE,
 881                 .set    = 1,
 882         },
 883         [DTV_TONE] = {
 884                 .name   = "DTV_TONE",
 885                 .cmd    = DTV_TONE,
 886                 .set    = 1,
 887         },
 888         [DTV_PILOT] = {
 889                 .name   = "DTV_PILOT",
 890                 .cmd    = DTV_PILOT,
 891                 .set    = 1,
 892         },
 893         [DTV_ROLLOFF] = {
 894                 .name   = "DTV_ROLLOFF",
 895                 .cmd    = DTV_ROLLOFF,
 896                 .set    = 1,
 897         },
 898         [DTV_DELIVERY_SYSTEM] = {
 899                 .name   = "DTV_DELIVERY_SYSTEM",
 900                 .cmd    = DTV_DELIVERY_SYSTEM,
 901                 .set    = 1,
 902         },
 903         [DTV_HIERARCHY] = {
 904                 .name   = "DTV_HIERARCHY",
 905                 .cmd    = DTV_HIERARCHY,
 906                 .set    = 1,
 907         },
 908         [DTV_CODE_RATE_HP] = {
 909                 .name   = "DTV_CODE_RATE_HP",
 910                 .cmd    = DTV_CODE_RATE_HP,
 911                 .set    = 1,
 912         },
 913         [DTV_CODE_RATE_LP] = {
 914                 .name   = "DTV_CODE_RATE_LP",
 915                 .cmd    = DTV_CODE_RATE_LP,
 916                 .set    = 1,
 917         },
 918         [DTV_GUARD_INTERVAL] = {
 919                 .name   = "DTV_GUARD_INTERVAL",
 920                 .cmd    = DTV_GUARD_INTERVAL,
 921                 .set    = 1,
 922         },
 923         [DTV_TRANSMISSION_MODE] = {
 924                 .name   = "DTV_TRANSMISSION_MODE",
 925                 .cmd    = DTV_TRANSMISSION_MODE,
 926                 .set    = 1,
 927         },
 928         /* Get */
 929         [DTV_DISEQC_SLAVE_REPLY] = {
 930                 .name   = "DTV_DISEQC_SLAVE_REPLY",
 931                 .cmd    = DTV_DISEQC_SLAVE_REPLY,
 932                 .set    = 0,
 933                 .buffer = 1,
 934         },
 935         [DTV_API_VERSION] = {
 936                 .name   = "DTV_API_VERSION",
 937                 .cmd    = DTV_API_VERSION,
 938                 .set    = 0,
 939         },
 940         [DTV_CODE_RATE_HP] = {
 941                 .name   = "DTV_CODE_RATE_HP",
 942                 .cmd    = DTV_CODE_RATE_HP,
 943                 .set    = 0,
 944         },
 945         [DTV_CODE_RATE_LP] = {
 946                 .name   = "DTV_CODE_RATE_LP",
 947                 .cmd    = DTV_CODE_RATE_LP,
 948                 .set    = 0,
 949         },
 950         [DTV_GUARD_INTERVAL] = {
 951                 .name   = "DTV_GUARD_INTERVAL",
 952                 .cmd    = DTV_GUARD_INTERVAL,
 953                 .set    = 0,
 954         },
 955         [DTV_TRANSMISSION_MODE] = {
 956                 .name   = "DTV_TRANSMISSION_MODE",
 957                 .cmd    = DTV_TRANSMISSION_MODE,
 958                 .set    = 0,
 959         },
 960         [DTV_HIERARCHY] = {
 961                 .name   = "DTV_HIERARCHY",
 962                 .cmd    = DTV_HIERARCHY,
 963                 .set    = 0,
 964         },
 965 };
 966
 967 static void dtv_property_dump(struct dtv_property *tvp)
 968 {
 969         int i;
 970
 971         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 972                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 973                         __func__, tvp->cmd);
 974                 return;
 975         }
 976
 977         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 978                 ,__func__
 979                 ,tvp->cmd
 980                 ,dtv_cmds[ tvp->cmd ].name);
 981
 982         if(dtv_cmds[ tvp->cmd ].buffer) {
 983
 984                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 985                         ,__func__
 986                         ,tvp->u.buffer.len);
 987
 988                 for(i = 0; i < tvp->u.buffer.len; i++)
 989                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
 990                                 ,__func__
 991                                 ,i
 992                                 ,tvp->u.buffer.data[i]);
 993
 994         } else
 995                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
 996 }
 997
 998 static int is_legacy_delivery_system(fe_delivery_system_t s)
 999 {
1000         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1001            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1002            (s == SYS_ATSC))
1003                 return 1;
1004
1005         return 0;
1006 }
1007
1008 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1009  * drivers can use a single set_frontend tuning function, regardless of whether
1010  * it's being used for the legacy or new API, reducing code and complexity.
1011  */
1012 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1013                                     struct dvb_frontend_parameters *p)
1014 {
1015         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1016
1017         c->frequency = p->frequency;
1018         c->inversion = p->inversion;
1019
1020         switch (fe->ops.info.type) {
1021         case FE_QPSK:
1022                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1023                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1024                 c->symbol_rate = p->u.qpsk.symbol_rate;
1025                 c->fec_inner = p->u.qpsk.fec_inner;
1026                 c->delivery_system = SYS_DVBS;
1027                 break;
1028         case FE_QAM:
1029                 c->symbol_rate = p->u.qam.symbol_rate;
1030                 c->fec_inner = p->u.qam.fec_inner;
1031                 c->modulation = p->u.qam.modulation;
1032                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1033                 break;
1034         case FE_OFDM:
1035                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1036                         c->bandwidth_hz = 6000000;
1037                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1038                         c->bandwidth_hz = 7000000;
1039                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1040                         c->bandwidth_hz = 8000000;
1041                 else
1042                         /* Including BANDWIDTH_AUTO */
1043                         c->bandwidth_hz = 0;
1044                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1045                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1046                 c->modulation = p->u.ofdm.constellation;
1047                 c->transmission_mode = p->u.ofdm.transmission_mode;
1048                 c->guard_interval = p->u.ofdm.guard_interval;
1049                 c->hierarchy = p->u.ofdm.hierarchy_information;
1050                 c->delivery_system = SYS_DVBT;
1051                 break;
1052         case FE_ATSC:
1053                 c->modulation = p->u.vsb.modulation;
1054                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1055                         c->delivery_system = SYS_ATSC;
1056                 else
1057                         c->delivery_system = SYS_DVBC_ANNEX_B;
1058                 break;
1059         }
1060 }
1061
1062 /* Ensure the cached values are set correctly in the frontend
1063  * legacy tuning structures, for the advanced tuning API.
1064  */
1065 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1066 {
1067         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1068         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1069         struct dvb_frontend_parameters *p = &fepriv->parameters;
1070
1071         p->frequency = c->frequency;
1072         p->inversion = c->inversion;
1073
1074         switch (fe->ops.info.type) {
1075         case FE_QPSK:
1076                 dprintk("%s() Preparing QPSK req\n", __func__);
1077                 p->u.qpsk.symbol_rate = c->symbol_rate;
1078                 p->u.qpsk.fec_inner = c->fec_inner;
1079                 c->delivery_system = SYS_DVBS;
1080                 break;
1081         case FE_QAM:
1082                 dprintk("%s() Preparing QAM req\n", __func__);
1083                 p->u.qam.symbol_rate = c->symbol_rate;
1084                 p->u.qam.fec_inner = c->fec_inner;
1085                 p->u.qam.modulation = c->modulation;
1086                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1087                 break;
1088         case FE_OFDM:
1089                 dprintk("%s() Preparing OFDM req\n", __func__);
1090                 if (c->bandwidth_hz == 6000000)
1091                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1092                 else if (c->bandwidth_hz == 7000000)
1093                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1094                 else if (c->bandwidth_hz == 8000000)
1095                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1096                 else
1097                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1098                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1099                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1100                 p->u.ofdm.constellation = c->modulation;
1101                 p->u.ofdm.transmission_mode = c->transmission_mode;
1102                 p->u.ofdm.guard_interval = c->guard_interval;
1103                 p->u.ofdm.hierarchy_information = c->hierarchy;
1104                 c->delivery_system = SYS_DVBT;
1105                 break;
1106         case FE_ATSC:
1107                 dprintk("%s() Preparing VSB req\n", __func__);
1108                 p->u.vsb.modulation = c->modulation;
1109                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1110                         c->delivery_system = SYS_ATSC;
1111                 else
1112                         c->delivery_system = SYS_DVBC_ANNEX_B;
1113                 break;
1114         }
1115 }
1116
1117 /* Ensure the cached values are set correctly in the frontend
1118  * legacy tuning structures, for the legacy tuning API.
1119  */
1120 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1121 {
1122         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1123         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1124         struct dvb_frontend_parameters *p = &fepriv->parameters;
1125
1126         p->frequency = c->frequency;
1127         p->inversion = c->inversion;
1128
1129         switch(c->modulation) {
1130         case PSK_8:
1131         case APSK_16:
1132         case APSK_32:
1133         case QPSK:
1134                 p->u.qpsk.symbol_rate = c->symbol_rate;
1135                 p->u.qpsk.fec_inner = c->fec_inner;
1136                 break;
1137         default:
1138                 break;
1139         }
1140
1141         if(c->delivery_system == SYS_ISDBT) {
1142                 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1143                 p->frequency = c->frequency;
1144                 p->inversion = INVERSION_AUTO;
1145                 p->u.ofdm.constellation = QAM_AUTO;
1146                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1147                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1148                 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1149                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1150                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1151                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1152         }
1153 }
1154
1155 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1156 {
1157         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1158
1159         /* For legacy delivery systems we don't need the delivery_system to
1160          * be specified, but we populate the older structures from the cache
1161          * so we can call set_frontend on older drivers.
1162          */
1163         if(is_legacy_delivery_system(c->delivery_system)) {
1164
1165                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1166                 dtv_property_legacy_params_sync(fe);
1167
1168         } else {
1169                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1170
1171                 /* For advanced delivery systems / modulation types ...
1172                  * we seed the lecacy dvb_frontend_parameters structure
1173                  * so that the sanity checking code later in the IOCTL processing
1174                  * can validate our basic frequency ranges, symbolrates, modulation
1175                  * etc.
1176                  */
1177                 dtv_property_adv_params_sync(fe);
1178         }
1179 }
1180
1181 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1182                         unsigned int cmd, void *parg);
1183 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1184                         unsigned int cmd, void *parg);
1185
1186 static int dtv_property_process_get(struct dvb_frontend *fe,
1187                                     struct dtv_property *tvp,
1188                                     struct inode *inode, struct file *file)
1189 {
1190         int r = 0;
1191
1192         dtv_property_dump(tvp);
1193
1194         /* Allow the frontend to validate incoming properties */
1195         if (fe->ops.get_property)
1196                 r = fe->ops.get_property(fe, tvp);
1197
1198         if (r < 0)
1199                 return r;
1200
1201         switch(tvp->cmd) {
1202         case DTV_FREQUENCY:
1203                 tvp->u.data = fe->dtv_property_cache.frequency;
1204                 break;
1205         case DTV_MODULATION:
1206                 tvp->u.data = fe->dtv_property_cache.modulation;
1207                 break;
1208         case DTV_BANDWIDTH_HZ:
1209                 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1210                 break;
1211         case DTV_INVERSION:
1212                 tvp->u.data = fe->dtv_property_cache.inversion;
1213                 break;
1214         case DTV_SYMBOL_RATE:
1215                 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1216                 break;
1217         case DTV_INNER_FEC:
1218                 tvp->u.data = fe->dtv_property_cache.fec_inner;
1219                 break;
1220         case DTV_PILOT:
1221                 tvp->u.data = fe->dtv_property_cache.pilot;
1222                 break;
1223         case DTV_ROLLOFF:
1224                 tvp->u.data = fe->dtv_property_cache.rolloff;
1225                 break;
1226         case DTV_DELIVERY_SYSTEM:
1227                 tvp->u.data = fe->dtv_property_cache.delivery_system;
1228                 break;
1229         case DTV_VOLTAGE:
1230                 tvp->u.data = fe->dtv_property_cache.voltage;
1231                 break;
1232         case DTV_TONE:
1233                 tvp->u.data = fe->dtv_property_cache.sectone;
1234                 break;
1235         case DTV_API_VERSION:
1236                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1237                 break;
1238         case DTV_CODE_RATE_HP:
1239                 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1240                 break;
1241         case DTV_CODE_RATE_LP:
1242                 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1243                 break;
1244         case DTV_GUARD_INTERVAL:
1245                 tvp->u.data = fe->dtv_property_cache.guard_interval;
1246                 break;
1247         case DTV_TRANSMISSION_MODE:
1248                 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1249                 break;
1250         case DTV_HIERARCHY:
1251                 tvp->u.data = fe->dtv_property_cache.hierarchy;
1252                 break;
1253         default:
1254                 r = -1;
1255         }
1256
1257         return r;
1258 }
1259
1260 static int dtv_property_process_set(struct dvb_frontend *fe,
1261                                     struct dtv_property *tvp,
1262                                     struct inode *inode,
1263                                     struct file *file)
1264 {
1265         int r = 0;
1266         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1267         dtv_property_dump(tvp);
1268
1269         /* Allow the frontend to validate incoming properties */
1270         if (fe->ops.set_property)
1271                 r = fe->ops.set_property(fe, tvp);
1272
1273         if (r < 0)
1274                 return r;
1275
1276         switch(tvp->cmd) {
1277         case DTV_CLEAR:
1278                 /* Reset a cache of data specific to the frontend here. This does
1279                  * not effect hardware.
1280                  */
1281                 dprintk("%s() Flushing property cache\n", __func__);
1282                 memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1283                 fe->dtv_property_cache.state = tvp->cmd;
1284                 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1285                 break;
1286         case DTV_TUNE:
1287                 /* interpret the cache of data, build either a traditional frontend
1288                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1289                  * ioctl.
1290                  */
1291                 fe->dtv_property_cache.state = tvp->cmd;
1292                 dprintk("%s() Finalised property cache\n", __func__);
1293                 dtv_property_cache_submit(fe);
1294
1295                 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1296                         &fepriv->parameters);
1297                 break;
1298         case DTV_FREQUENCY:
1299                 fe->dtv_property_cache.frequency = tvp->u.data;
1300                 break;
1301         case DTV_MODULATION:
1302                 fe->dtv_property_cache.modulation = tvp->u.data;
1303                 break;
1304         case DTV_BANDWIDTH_HZ:
1305                 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1306                 break;
1307         case DTV_INVERSION:
1308                 fe->dtv_property_cache.inversion = tvp->u.data;
1309                 break;
1310         case DTV_SYMBOL_RATE:
1311                 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1312                 break;
1313         case DTV_INNER_FEC:
1314                 fe->dtv_property_cache.fec_inner = tvp->u.data;
1315                 break;
1316         case DTV_PILOT:
1317                 fe->dtv_property_cache.pilot = tvp->u.data;
1318                 break;
1319         case DTV_ROLLOFF:
1320                 fe->dtv_property_cache.rolloff = tvp->u.data;
1321                 break;
1322         case DTV_DELIVERY_SYSTEM:
1323                 fe->dtv_property_cache.delivery_system = tvp->u.data;
1324                 break;
1325         case DTV_VOLTAGE:
1326                 fe->dtv_property_cache.voltage = tvp->u.data;
1327                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1328                         (void *)fe->dtv_property_cache.voltage);
1329                 break;
1330         case DTV_TONE:
1331                 fe->dtv_property_cache.sectone = tvp->u.data;
1332                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1333                         (void *)fe->dtv_property_cache.sectone);
1334                 break;
1335         case DTV_CODE_RATE_HP:
1336                 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1337                 break;
1338         case DTV_CODE_RATE_LP:
1339                 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1340                 break;
1341         case DTV_GUARD_INTERVAL:
1342                 fe->dtv_property_cache.guard_interval = tvp->u.data;
1343                 break;
1344         case DTV_TRANSMISSION_MODE:
1345                 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1346                 break;
1347         case DTV_HIERARCHY:
1348                 fe->dtv_property_cache.hierarchy = tvp->u.data;
1349                 break;
1350         default:
1351                 r = -1;
1352         }
1353
1354         return r;
1355 }
1356
1357 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1358                         unsigned int cmd, void *parg)
1359 {
1360         struct dvb_device *dvbdev = file->private_data;
1361         struct dvb_frontend *fe = dvbdev->priv;
1362         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1363         int err = -EOPNOTSUPP;
1364
1365         dprintk ("%s\n", __func__);
1366
1367         if (fepriv->exit)
1368                 return -ENODEV;
1369
1370         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1371             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1372              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1373                 return -EPERM;
1374
1375         if (down_interruptible (&fepriv->sem))
1376                 return -ERESTARTSYS;
1377
1378         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1379                 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1380         else {
1381                 fe->dtv_property_cache.state = DTV_UNDEFINED;
1382                 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1383         }
1384
1385         up(&fepriv->sem);
1386         return err;
1387 }
1388
1389 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1390                         unsigned int cmd, void *parg)
1391 {
1392         struct dvb_device *dvbdev = file->private_data;
1393         struct dvb_frontend *fe = dvbdev->priv;
1394         int err = 0;
1395
1396         struct dtv_properties *tvps = NULL;
1397         struct dtv_property *tvp = NULL;
1398         int i;
1399
1400         dprintk("%s\n", __func__);
1401
1402         if(cmd == FE_SET_PROPERTY) {
1403                 tvps = (struct dtv_properties __user *)parg;
1404
1405                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1406                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1407
1408                 /* Put an arbitrary limit on the number of messages that can
1409                  * be sent at once */
1410                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1411                         return -EINVAL;
1412
1413                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1414                         sizeof(struct dtv_property), GFP_KERNEL);
1415                 if (!tvp) {
1416                         err = -ENOMEM;
1417                         goto out;
1418                 }
1419
1420                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1421                         err = -EFAULT;
1422                         goto out;
1423                 }
1424
1425                 for (i = 0; i < tvps->num; i++) {
1426                         (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1427                         err |= (tvp + i)->result;
1428                 }
1429
1430                 if(fe->dtv_property_cache.state == DTV_TUNE)
1431                         dprintk("%s() Property cache is full, tuning\n", __func__);
1432
1433         } else
1434         if(cmd == FE_GET_PROPERTY) {
1435
1436                 tvps = (struct dtv_properties __user *)parg;
1437
1438                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1439                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1440
1441                 /* Put an arbitrary limit on the number of messages that can
1442                  * be sent at once */
1443                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1444                         return -EINVAL;
1445
1446                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1447                         sizeof(struct dtv_property), GFP_KERNEL);
1448                 if (!tvp) {
1449                         err = -ENOMEM;
1450                         goto out;
1451                 }
1452
1453                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1454                         err = -EFAULT;
1455                         goto out;
1456                 }
1457
1458                 for (i = 0; i < tvps->num; i++) {
1459                         (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1460                         err |= (tvp + i)->result;
1461                 }
1462
1463                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1464                         err = -EFAULT;
1465                         goto out;
1466                 }
1467
1468         } else
1469                 err = -EOPNOTSUPP;
1470
1471 out:
1472         kfree(tvp);
1473         return err;
1474 }
1475
1476 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1477                         unsigned int cmd, void *parg)
1478 {
1479         struct dvb_device *dvbdev = file->private_data;
1480         struct dvb_frontend *fe = dvbdev->priv;
1481         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1482         int err = -EOPNOTSUPP;
1483
1484         switch (cmd) {
1485         case FE_GET_INFO: {
1486                 struct dvb_frontend_info* info = parg;
1487                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1488                 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1489
1490                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1491                  * do it, it is done for it. */
1492                 info->caps |= FE_CAN_INVERSION_AUTO;
1493                 err = 0;
1494                 break;
1495         }
1496
1497         case FE_READ_STATUS: {
1498                 fe_status_t* status = parg;
1499
1500                 /* if retune was requested but hasn't occured yet, prevent
1501                  * that user get signal state from previous tuning */
1502                 if(fepriv->state == FESTATE_RETUNE) {
1503                         err=0;
1504                         *status = 0;
1505                         break;
1506                 }
1507
1508                 if (fe->ops.read_status)
1509                         err = fe->ops.read_status(fe, status);
1510                 break;
1511         }
1512         case FE_READ_BER:
1513                 if (fe->ops.read_ber)
1514                         err = fe->ops.read_ber(fe, (__u32*) parg);
1515                 break;
1516
1517         case FE_READ_SIGNAL_STRENGTH:
1518                 if (fe->ops.read_signal_strength)
1519                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1520                 break;
1521
1522         case FE_READ_SNR:
1523                 if (fe->ops.read_snr)
1524                         err = fe->ops.read_snr(fe, (__u16*) parg);
1525                 break;
1526
1527         case FE_READ_UNCORRECTED_BLOCKS:
1528                 if (fe->ops.read_ucblocks)
1529                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1530                 break;
1531
1532
1533         case FE_DISEQC_RESET_OVERLOAD:
1534                 if (fe->ops.diseqc_reset_overload) {
1535                         err = fe->ops.diseqc_reset_overload(fe);
1536                         fepriv->state = FESTATE_DISEQC;
1537                         fepriv->status = 0;
1538                 }
1539                 break;
1540
1541         case FE_DISEQC_SEND_MASTER_CMD:
1542                 if (fe->ops.diseqc_send_master_cmd) {
1543                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1544                         fepriv->state = FESTATE_DISEQC;
1545                         fepriv->status = 0;
1546                 }
1547                 break;
1548
1549         case FE_DISEQC_SEND_BURST:
1550                 if (fe->ops.diseqc_send_burst) {
1551                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1552                         fepriv->state = FESTATE_DISEQC;
1553                         fepriv->status = 0;
1554                 }
1555                 break;
1556
1557         case FE_SET_TONE:
1558                 if (fe->ops.set_tone) {
1559                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1560                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1561                         fepriv->state = FESTATE_DISEQC;
1562                         fepriv->status = 0;
1563                 }
1564                 break;
1565
1566         case FE_SET_VOLTAGE:
1567                 if (fe->ops.set_voltage) {
1568                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1569                         fepriv->voltage = (fe_sec_voltage_t) parg;
1570                         fepriv->state = FESTATE_DISEQC;
1571                         fepriv->status = 0;
1572                 }
1573                 break;
1574
1575         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1576                 if (fe->ops.dishnetwork_send_legacy_command) {
1577                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1578                         fepriv->state = FESTATE_DISEQC;
1579                         fepriv->status = 0;
1580                 } else if (fe->ops.set_voltage) {
1581                         /*
1582                          * NOTE: This is a fallback condition.  Some frontends
1583                          * (stv0299 for instance) take longer than 8msec to
1584                          * respond to a set_voltage command.  Those switches
1585                          * need custom routines to switch properly.  For all
1586                          * other frontends, the following shoule work ok.
1587                          * Dish network legacy switches (as used by Dish500)
1588                          * are controlled by sending 9-bit command words
1589                          * spaced 8msec apart.
1590                          * the actual command word is switch/port dependant
1591                          * so it is up to the userspace application to send
1592                          * the right command.
1593                          * The command must always start with a '0' after
1594                          * initialization, so parg is 8 bits and does not
1595                          * include the initialization or start bit
1596                          */
1597                         unsigned long swcmd = ((unsigned long) parg) << 1;
1598                         struct timeval nexttime;
1599                         struct timeval tv[10];
1600                         int i;
1601                         u8 last = 1;
1602                         if (dvb_frontend_debug)
1603                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1604                         do_gettimeofday(&nexttime);
1605                         if (dvb_frontend_debug)
1606                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1607                         /* before sending a command, initialize by sending
1608                          * a 32ms 18V to the switch
1609                          */
1610                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1611                         dvb_frontend_sleep_until(&nexttime, 32000);
1612
1613                         for (i = 0; i < 9; i++) {
1614                                 if (dvb_frontend_debug)
1615                                         do_gettimeofday(&tv[i + 1]);
1616                                 if ((swcmd & 0x01) != last) {
1617                                         /* set voltage to (last ? 13V : 18V) */
1618                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1619                                         last = (last) ? 0 : 1;
1620                                 }
1621                                 swcmd = swcmd >> 1;
1622                                 if (i != 8)
1623                                         dvb_frontend_sleep_until(&nexttime, 8000);
1624                         }
1625                         if (dvb_frontend_debug) {
1626                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1627                                         __func__, fe->dvb->num);
1628                                 for (i = 1; i < 10; i++)
1629                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1630                         }
1631                         err = 0;
1632                         fepriv->state = FESTATE_DISEQC;
1633                         fepriv->status = 0;
1634                 }
1635                 break;
1636
1637         case FE_DISEQC_RECV_SLAVE_REPLY:
1638                 if (fe->ops.diseqc_recv_slave_reply)
1639                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1640                 break;
1641
1642         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1643                 if (fe->ops.enable_high_lnb_voltage)
1644                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1645                 break;
1646
1647         case FE_SET_FRONTEND: {
1648                 struct dvb_frontend_tune_settings fetunesettings;
1649
1650                 if(fe->dtv_property_cache.state == DTV_TUNE) {
1651                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1652                                 err = -EINVAL;
1653                                 break;
1654                         }
1655                 } else {
1656                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1657                                 err = -EINVAL;
1658                                 break;
1659                         }
1660
1661                         memcpy (&fepriv->parameters, parg,
1662                                 sizeof (struct dvb_frontend_parameters));
1663                         dtv_property_cache_sync(fe, &fepriv->parameters);
1664                 }
1665
1666                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1667                 memcpy(&fetunesettings.parameters, parg,
1668                        sizeof (struct dvb_frontend_parameters));
1669
1670                 /* force auto frequency inversion if requested */
1671                 if (dvb_force_auto_inversion) {
1672                         fepriv->parameters.inversion = INVERSION_AUTO;
1673                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1674                 }
1675                 if (fe->ops.info.type == FE_OFDM) {
1676                         /* without hierarchical coding code_rate_LP is irrelevant,
1677                          * so we tolerate the otherwise invalid FEC_NONE setting */
1678                         if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1679                             fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1680                                 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1681                 }
1682
1683                 /* get frontend-specific tuning settings */
1684                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1685                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1686                         fepriv->max_drift = fetunesettings.max_drift;
1687                         fepriv->step_size = fetunesettings.step_size;
1688                 } else {
1689                         /* default values */
1690                         switch(fe->ops.info.type) {
1691                         case FE_QPSK:
1692                                 fepriv->min_delay = HZ/20;
1693                                 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1694                                 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1695                                 break;
1696
1697                         case FE_QAM:
1698                                 fepriv->min_delay = HZ/20;
1699                                 fepriv->step_size = 0; /* no zigzag */
1700                                 fepriv->max_drift = 0;
1701                                 break;
1702
1703                         case FE_OFDM:
1704                                 fepriv->min_delay = HZ/20;
1705                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1706                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1707                                 break;
1708                         case FE_ATSC:
1709                                 fepriv->min_delay = HZ/20;
1710                                 fepriv->step_size = 0;
1711                                 fepriv->max_drift = 0;
1712                                 break;
1713                         }
1714                 }
1715                 if (dvb_override_tune_delay > 0)
1716                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1717
1718                 fepriv->state = FESTATE_RETUNE;
1719
1720                 /* Request the search algorithm to search */
1721                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1722
1723                 dvb_frontend_wakeup(fe);
1724                 dvb_frontend_add_event(fe, 0);
1725                 fepriv->status = 0;
1726                 err = 0;
1727                 break;
1728         }
1729
1730         case FE_GET_EVENT:
1731                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1732                 break;
1733
1734         case FE_GET_FRONTEND:
1735                 if (fe->ops.get_frontend) {
1736                         memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1737                         err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1738                 }
1739                 break;
1740
1741         case FE_SET_FRONTEND_TUNE_MODE:
1742                 fepriv->tune_mode_flags = (unsigned long) parg;
1743                 err = 0;
1744                 break;
1745         };
1746
1747         return err;
1748 }
1749
1750
1751 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1752 {
1753         struct dvb_device *dvbdev = file->private_data;
1754         struct dvb_frontend *fe = dvbdev->priv;
1755         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1756
1757         dprintk ("%s\n", __func__);
1758
1759         poll_wait (file, &fepriv->events.wait_queue, wait);
1760
1761         if (fepriv->events.eventw != fepriv->events.eventr)
1762                 return (POLLIN | POLLRDNORM | POLLPRI);
1763
1764         return 0;
1765 }
1766
1767 static int dvb_frontend_open(struct inode *inode, struct file *file)
1768 {
1769         struct dvb_device *dvbdev = file->private_data;
1770         struct dvb_frontend *fe = dvbdev->priv;
1771         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1772         struct dvb_adapter *adapter = fe->dvb;
1773         int ret;
1774
1775         dprintk ("%s\n", __func__);
1776
1777         if (adapter->mfe_shared) {
1778                 mutex_lock (&adapter->mfe_lock);
1779
1780                 if (adapter->mfe_dvbdev == NULL)
1781                         adapter->mfe_dvbdev = dvbdev;
1782
1783                 else if (adapter->mfe_dvbdev != dvbdev) {
1784                         struct dvb_device
1785                                 *mfedev = adapter->mfe_dvbdev;
1786                         struct dvb_frontend
1787                                 *mfe = mfedev->priv;
1788                         struct dvb_frontend_private
1789                                 *mfepriv = mfe->frontend_priv;
1790                         int mferetry = (dvb_mfe_wait_time << 1);
1791
1792                         mutex_unlock (&adapter->mfe_lock);
1793                         while (mferetry-- && (mfedev->users != -1 ||
1794                                         mfepriv->thread != NULL)) {
1795                                 if(msleep_interruptible(500)) {
1796                                         if(signal_pending(current))
1797                                                 return -EINTR;
1798                                 }
1799                         }
1800
1801                         mutex_lock (&adapter->mfe_lock);
1802                         if(adapter->mfe_dvbdev != dvbdev) {
1803                                 mfedev = adapter->mfe_dvbdev;
1804                                 mfe = mfedev->priv;
1805                                 mfepriv = mfe->frontend_priv;
1806                                 if (mfedev->users != -1 ||
1807                                                 mfepriv->thread != NULL) {
1808                                         mutex_unlock (&adapter->mfe_lock);
1809                                         return -EBUSY;
1810                                 }
1811                                 adapter->mfe_dvbdev = dvbdev;
1812                         }
1813                 }
1814         }
1815
1816         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1817                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1818                         goto err0;
1819         }
1820
1821         if ((ret = dvb_generic_open (inode, file)) < 0)
1822                 goto err1;
1823
1824         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1825                 /* normal tune mode when opened R/W */
1826                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1827                 fepriv->tone = -1;
1828                 fepriv->voltage = -1;
1829
1830                 ret = dvb_frontend_start (fe);
1831                 if (ret)
1832                         goto err2;
1833
1834                 /*  empty event queue */
1835                 fepriv->events.eventr = fepriv->events.eventw = 0;
1836         }
1837
1838         if (adapter->mfe_shared)
1839                 mutex_unlock (&adapter->mfe_lock);
1840         return ret;
1841
1842 err2:
1843         dvb_generic_release(inode, file);
1844 err1:
1845         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1846                 fe->ops.ts_bus_ctrl(fe, 0);
1847 err0:
1848         if (adapter->mfe_shared)
1849                 mutex_unlock (&adapter->mfe_lock);
1850         return ret;
1851 }
1852
1853 static int dvb_frontend_release(struct inode *inode, struct file *file)
1854 {
1855         struct dvb_device *dvbdev = file->private_data;
1856         struct dvb_frontend *fe = dvbdev->priv;
1857         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1858         int ret;
1859
1860         dprintk ("%s\n", __func__);
1861
1862         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
1863                 fepriv->release_jiffies = jiffies;
1864
1865         ret = dvb_generic_release (inode, file);
1866
1867         if (dvbdev->users == -1) {
1868                 if (fepriv->exit == 1) {
1869                         fops_put(file->f_op);
1870                         file->f_op = NULL;
1871                         wake_up(&dvbdev->wait_queue);
1872                 }
1873                 if (fe->ops.ts_bus_ctrl)
1874                         fe->ops.ts_bus_ctrl(fe, 0);
1875         }
1876
1877         return ret;
1878 }
1879
1880 static const struct file_operations dvb_frontend_fops = {
1881         .owner          = THIS_MODULE,
1882         .ioctl          = dvb_generic_ioctl,
1883         .poll           = dvb_frontend_poll,
1884         .open           = dvb_frontend_open,
1885         .release        = dvb_frontend_release
1886 };
1887
1888 int dvb_register_frontend(struct dvb_adapter* dvb,
1889                           struct dvb_frontend* fe)
1890 {
1891         struct dvb_frontend_private *fepriv;
1892         static const struct dvb_device dvbdev_template = {
1893                 .users = ~0,
1894                 .writers = 1,
1895                 .readers = (~0)-1,
1896                 .fops = &dvb_frontend_fops,
1897                 .kernel_ioctl = dvb_frontend_ioctl
1898         };
1899
1900         dprintk ("%s\n", __func__);
1901
1902         if (mutex_lock_interruptible(&frontend_mutex))
1903                 return -ERESTARTSYS;
1904
1905         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
1906         if (fe->frontend_priv == NULL) {
1907                 mutex_unlock(&frontend_mutex);
1908                 return -ENOMEM;
1909         }
1910         fepriv = fe->frontend_priv;
1911
1912         init_MUTEX (&fepriv->sem);
1913         init_waitqueue_head (&fepriv->wait_queue);
1914         init_waitqueue_head (&fepriv->events.wait_queue);
1915         mutex_init(&fepriv->events.mtx);
1916         fe->dvb = dvb;
1917         fepriv->inversion = INVERSION_OFF;
1918
1919         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
1920                 fe->dvb->num,
1921                 fe->id,
1922                 fe->ops.info.name);
1923
1924         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
1925                              fe, DVB_DEVICE_FRONTEND);
1926
1927         mutex_unlock(&frontend_mutex);
1928         return 0;
1929 }
1930 EXPORT_SYMBOL(dvb_register_frontend);
1931
1932 int dvb_unregister_frontend(struct dvb_frontend* fe)
1933 {
1934         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1935         dprintk ("%s\n", __func__);
1936
1937         mutex_lock(&frontend_mutex);
1938         dvb_frontend_stop (fe);
1939         mutex_unlock(&frontend_mutex);
1940
1941         if (fepriv->dvbdev->users < -1)
1942                 wait_event(fepriv->dvbdev->wait_queue,
1943                                 fepriv->dvbdev->users==-1);
1944
1945         mutex_lock(&frontend_mutex);
1946         dvb_unregister_device (fepriv->dvbdev);
1947
1948         /* fe is invalid now */
1949         kfree(fepriv);
1950         mutex_unlock(&frontend_mutex);
1951         return 0;
1952 }
1953 EXPORT_SYMBOL(dvb_unregister_frontend);
1954
1955 #ifdef CONFIG_MEDIA_ATTACH
1956 void dvb_frontend_detach(struct dvb_frontend* fe)
1957 {
1958         void *ptr;
1959
1960         if (fe->ops.release_sec) {
1961                 fe->ops.release_sec(fe);
1962                 symbol_put_addr(fe->ops.release_sec);
1963         }
1964         if (fe->ops.tuner_ops.release) {
1965                 fe->ops.tuner_ops.release(fe);
1966                 symbol_put_addr(fe->ops.tuner_ops.release);
1967         }
1968         if (fe->ops.analog_ops.release) {
1969                 fe->ops.analog_ops.release(fe);
1970                 symbol_put_addr(fe->ops.analog_ops.release);
1971         }
1972         ptr = (void*)fe->ops.release;
1973         if (ptr) {
1974                 fe->ops.release(fe);
1975                 symbol_put_addr(ptr);
1976         }
1977 }
1978 #else
1979 void dvb_frontend_detach(struct dvb_frontend* fe)
1980 {
1981         if (fe->ops.release_sec)
1982                 fe->ops.release_sec(fe);
1983         if (fe->ops.tuner_ops.release)
1984                 fe->ops.tuner_ops.release(fe);
1985         if (fe->ops.analog_ops.release)
1986                 fe->ops.analog_ops.release(fe);
1987         if (fe->ops.release)
1988                 fe->ops.release(fe);
1989 }
1990 #endif
1991 EXPORT_SYMBOL(dvb_frontend_detach);