git.oblomov.eu Git - linux-2.6/blob - drivers/media/dvb/dvb-core/dvb_frontend.c

   1 /*
   2  * dvb_frontend.c: DVB frontend tuning interface/thread
   3  *
   4  *
   5  * Copyright (C) 1999-2001 Ralph  Metzler
   6  *                         Marcus Metzler
   7  *                         Holger Waechtler
   8  *                                    for convergence integrated media GmbH
   9  *
  10  * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26  */
  27
  28 #include <linux/string.h>
  29 #include <linux/kernel.h>
  30 #include <linux/sched.h>
  31 #include <linux/wait.h>
  32 #include <linux/slab.h>
  33 #include <linux/poll.h>
  34 #include <linux/module.h>
  35 #include <linux/list.h>
  36 #include <linux/freezer.h>
  37 #include <linux/jiffies.h>
  38 #include <linux/kthread.h>
  39 #include <asm/processor.h>
  40
  41 #include "dvb_frontend.h"
  42 #include "dvbdev.h"
  43 #include <linux/dvb/version.h>
  44
  45 static int dvb_frontend_debug;
  46 static int dvb_shutdown_timeout;
  47 static int dvb_force_auto_inversion;
  48 static int dvb_override_tune_delay;
  49 static int dvb_powerdown_on_sleep = 1;
  50 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) {
 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                                         fepriv->state = FESTATE_TUNED;
 599                                 }
 600                                 /* Case where we are going to search for a carrier
 601                                  * User asked us to retune again for some reason, possibly
 602                                  * requesting a search with a new set of parameters
 603                                  */
 604                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 605                                         if (fe->ops.search) {
 606                                                 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
 607                                                 /* We did do a search as was requested, the flags are
 608                                                  * now unset as well and has the flags wrt to search.
 609                                                  */
 610                                         } else {
 611                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 612                                         }
 613                                 }
 614                                 /* Track the carrier if the search was successful */
 615                                 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
 616                                         if (fe->ops.track)
 617                                                 fe->ops.track(fe, &fepriv->parameters);
 618                                 } else {
 619                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 620                                         fepriv->delay = HZ / 2;
 621                                 }
 622                                 fe->ops.read_status(fe, &s);
 623                                 if (s != fepriv->status) {
 624                                         dvb_frontend_add_event(fe, s); /* update event list */
 625                                         fepriv->status = s;
 626                                         if (!(s & FE_HAS_LOCK)) {
 627                                                 fepriv->delay = HZ / 10;
 628                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 629                                         } else {
 630                                                 fepriv->delay = 60 * HZ;
 631                                         }
 632                                 }
 633                                 break;
 634                         default:
 635                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 636                                 break;
 637                         }
 638                 } else {
 639                         dvb_frontend_swzigzag(fe);
 640                 }
 641         }
 642
 643         if (dvb_powerdown_on_sleep) {
 644                 if (fe->ops.set_voltage)
 645                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 646                 if (fe->ops.tuner_ops.sleep) {
 647                         if (fe->ops.i2c_gate_ctrl)
 648                                 fe->ops.i2c_gate_ctrl(fe, 1);
 649                         fe->ops.tuner_ops.sleep(fe);
 650                         if (fe->ops.i2c_gate_ctrl)
 651                                 fe->ops.i2c_gate_ctrl(fe, 0);
 652                 }
 653                 if (fe->ops.sleep)
 654                         fe->ops.sleep(fe);
 655         }
 656
 657         fepriv->thread = NULL;
 658         mb();
 659
 660         dvb_frontend_wakeup(fe);
 661         return 0;
 662 }
 663
 664 static void dvb_frontend_stop(struct dvb_frontend *fe)
 665 {
 666         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 667
 668         dprintk ("%s\n", __func__);
 669
 670         fepriv->exit = 1;
 671         mb();
 672
 673         if (!fepriv->thread)
 674                 return;
 675
 676         kthread_stop(fepriv->thread);
 677
 678         init_MUTEX (&fepriv->sem);
 679         fepriv->state = FESTATE_IDLE;
 680
 681         /* paranoia check in case a signal arrived */
 682         if (fepriv->thread)
 683                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 684                                 fepriv->thread);
 685 }
 686
 687 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 688 {
 689         return ((curtime.tv_usec < lasttime.tv_usec) ?
 690                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 691                 curtime.tv_usec - lasttime.tv_usec);
 692 }
 693 EXPORT_SYMBOL(timeval_usec_diff);
 694
 695 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 696 {
 697         curtime->tv_usec += add_usec;
 698         if (curtime->tv_usec >= 1000000) {
 699                 curtime->tv_usec -= 1000000;
 700                 curtime->tv_sec++;
 701         }
 702 }
 703
 704 /*
 705  * Sleep until gettimeofday() > waketime + add_usec
 706  * This needs to be as precise as possible, but as the delay is
 707  * usually between 2ms and 32ms, it is done using a scheduled msleep
 708  * followed by usleep (normally a busy-wait loop) for the remainder
 709  */
 710 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 711 {
 712         struct timeval lasttime;
 713         s32 delta, newdelta;
 714
 715         timeval_usec_add(waketime, add_usec);
 716
 717         do_gettimeofday(&lasttime);
 718         delta = timeval_usec_diff(lasttime, *waketime);
 719         if (delta > 2500) {
 720                 msleep((delta - 1500) / 1000);
 721                 do_gettimeofday(&lasttime);
 722                 newdelta = timeval_usec_diff(lasttime, *waketime);
 723                 delta = (newdelta > delta) ? 0 : newdelta;
 724         }
 725         if (delta > 0)
 726                 udelay(delta);
 727 }
 728 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 729
 730 static int dvb_frontend_start(struct dvb_frontend *fe)
 731 {
 732         int ret;
 733         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 734         struct task_struct *fe_thread;
 735
 736         dprintk ("%s\n", __func__);
 737
 738         if (fepriv->thread) {
 739                 if (!fepriv->exit)
 740                         return 0;
 741                 else
 742                         dvb_frontend_stop (fe);
 743         }
 744
 745         if (signal_pending(current))
 746                 return -EINTR;
 747         if (down_interruptible (&fepriv->sem))
 748                 return -EINTR;
 749
 750         fepriv->state = FESTATE_IDLE;
 751         fepriv->exit = 0;
 752         fepriv->thread = NULL;
 753         mb();
 754
 755         fe_thread = kthread_run(dvb_frontend_thread, fe,
 756                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 757         if (IS_ERR(fe_thread)) {
 758                 ret = PTR_ERR(fe_thread);
 759                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 760                 up(&fepriv->sem);
 761                 return ret;
 762         }
 763         fepriv->thread = fe_thread;
 764         return 0;
 765 }
 766
 767 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
 768                                         u32 *freq_min, u32 *freq_max)
 769 {
 770         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 771
 772         if (fe->ops.info.frequency_max == 0)
 773                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 774         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 775                 *freq_max = fe->ops.info.frequency_max;
 776         else
 777                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 778
 779         if (*freq_min == 0 || *freq_max == 0)
 780                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 781                        fe->dvb->num,fe->id);
 782 }
 783
 784 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 785                                 struct dvb_frontend_parameters *parms)
 786 {
 787         u32 freq_min;
 788         u32 freq_max;
 789
 790         /* range check: frequency */
 791         dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
 792         if ((freq_min && parms->frequency < freq_min) ||
 793             (freq_max && parms->frequency > freq_max)) {
 794                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 795                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 796                 return -EINVAL;
 797         }
 798
 799         /* range check: symbol rate */
 800         if (fe->ops.info.type == FE_QPSK) {
 801                 if ((fe->ops.info.symbol_rate_min &&
 802                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 803                     (fe->ops.info.symbol_rate_max &&
 804                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 805                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 806                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 807                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 808                         return -EINVAL;
 809                 }
 810
 811         } else if (fe->ops.info.type == FE_QAM) {
 812                 if ((fe->ops.info.symbol_rate_min &&
 813                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 814                     (fe->ops.info.symbol_rate_max &&
 815                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 816                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 817                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 818                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 819                         return -EINVAL;
 820                 }
 821         }
 822
 823         return 0;
 824 }
 825
 826 struct dtv_cmds_h dtv_cmds[] = {
 827         [DTV_TUNE] = {
 828                 .name   = "DTV_TUNE",
 829                 .cmd    = DTV_TUNE,
 830                 .set    = 1,
 831         },
 832         [DTV_CLEAR] = {
 833                 .name   = "DTV_CLEAR",
 834                 .cmd    = DTV_CLEAR,
 835                 .set    = 1,
 836         },
 837
 838         /* Set */
 839         [DTV_FREQUENCY] = {
 840                 .name   = "DTV_FREQUENCY",
 841                 .cmd    = DTV_FREQUENCY,
 842                 .set    = 1,
 843         },
 844         [DTV_BANDWIDTH_HZ] = {
 845                 .name   = "DTV_BANDWIDTH_HZ",
 846                 .cmd    = DTV_BANDWIDTH_HZ,
 847                 .set    = 1,
 848         },
 849         [DTV_MODULATION] = {
 850                 .name   = "DTV_MODULATION",
 851                 .cmd    = DTV_MODULATION,
 852                 .set    = 1,
 853         },
 854         [DTV_INVERSION] = {
 855                 .name   = "DTV_INVERSION",
 856                 .cmd    = DTV_INVERSION,
 857                 .set    = 1,
 858         },
 859         [DTV_DISEQC_MASTER] = {
 860                 .name   = "DTV_DISEQC_MASTER",
 861                 .cmd    = DTV_DISEQC_MASTER,
 862                 .set    = 1,
 863                 .buffer = 1,
 864         },
 865         [DTV_SYMBOL_RATE] = {
 866                 .name   = "DTV_SYMBOL_RATE",
 867                 .cmd    = DTV_SYMBOL_RATE,
 868                 .set    = 1,
 869         },
 870         [DTV_INNER_FEC] = {
 871                 .name   = "DTV_INNER_FEC",
 872                 .cmd    = DTV_INNER_FEC,
 873                 .set    = 1,
 874         },
 875         [DTV_VOLTAGE] = {
 876                 .name   = "DTV_VOLTAGE",
 877                 .cmd    = DTV_VOLTAGE,
 878                 .set    = 1,
 879         },
 880         [DTV_TONE] = {
 881                 .name   = "DTV_TONE",
 882                 .cmd    = DTV_TONE,
 883                 .set    = 1,
 884         },
 885         [DTV_PILOT] = {
 886                 .name   = "DTV_PILOT",
 887                 .cmd    = DTV_PILOT,
 888                 .set    = 1,
 889         },
 890         [DTV_ROLLOFF] = {
 891                 .name   = "DTV_ROLLOFF",
 892                 .cmd    = DTV_ROLLOFF,
 893                 .set    = 1,
 894         },
 895         [DTV_DELIVERY_SYSTEM] = {
 896                 .name   = "DTV_DELIVERY_SYSTEM",
 897                 .cmd    = DTV_DELIVERY_SYSTEM,
 898                 .set    = 1,
 899         },
 900         [DTV_HIERARCHY] = {
 901                 .name   = "DTV_HIERARCHY",
 902                 .cmd    = DTV_HIERARCHY,
 903                 .set    = 1,
 904         },
 905         [DTV_CODE_RATE_HP] = {
 906                 .name   = "DTV_CODE_RATE_HP",
 907                 .cmd    = DTV_CODE_RATE_HP,
 908                 .set    = 1,
 909         },
 910         [DTV_CODE_RATE_LP] = {
 911                 .name   = "DTV_CODE_RATE_LP",
 912                 .cmd    = DTV_CODE_RATE_LP,
 913                 .set    = 1,
 914         },
 915         [DTV_GUARD_INTERVAL] = {
 916                 .name   = "DTV_GUARD_INTERVAL",
 917                 .cmd    = DTV_GUARD_INTERVAL,
 918                 .set    = 1,
 919         },
 920         [DTV_TRANSMISSION_MODE] = {
 921                 .name   = "DTV_TRANSMISSION_MODE",
 922                 .cmd    = DTV_TRANSMISSION_MODE,
 923                 .set    = 1,
 924         },
 925         /* Get */
 926         [DTV_DISEQC_SLAVE_REPLY] = {
 927                 .name   = "DTV_DISEQC_SLAVE_REPLY",
 928                 .cmd    = DTV_DISEQC_SLAVE_REPLY,
 929                 .set    = 0,
 930                 .buffer = 1,
 931         },
 932         [DTV_API_VERSION] = {
 933                 .name   = "DTV_API_VERSION",
 934                 .cmd    = DTV_API_VERSION,
 935                 .set    = 0,
 936         },
 937         [DTV_CODE_RATE_HP] = {
 938                 .name   = "DTV_CODE_RATE_HP",
 939                 .cmd    = DTV_CODE_RATE_HP,
 940                 .set    = 0,
 941         },
 942         [DTV_CODE_RATE_LP] = {
 943                 .name   = "DTV_CODE_RATE_LP",
 944                 .cmd    = DTV_CODE_RATE_LP,
 945                 .set    = 0,
 946         },
 947         [DTV_GUARD_INTERVAL] = {
 948                 .name   = "DTV_GUARD_INTERVAL",
 949                 .cmd    = DTV_GUARD_INTERVAL,
 950                 .set    = 0,
 951         },
 952         [DTV_TRANSMISSION_MODE] = {
 953                 .name   = "DTV_TRANSMISSION_MODE",
 954                 .cmd    = DTV_TRANSMISSION_MODE,
 955                 .set    = 0,
 956         },
 957         [DTV_HIERARCHY] = {
 958                 .name   = "DTV_HIERARCHY",
 959                 .cmd    = DTV_HIERARCHY,
 960                 .set    = 0,
 961         },
 962 };
 963
 964 void dtv_property_dump(struct dtv_property *tvp)
 965 {
 966         int i;
 967
 968         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 969                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 970                         __func__, tvp->cmd);
 971                 return;
 972         }
 973
 974         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 975                 ,__func__
 976                 ,tvp->cmd
 977                 ,dtv_cmds[ tvp->cmd ].name);
 978
 979         if(dtv_cmds[ tvp->cmd ].buffer) {
 980
 981                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 982                         ,__func__
 983                         ,tvp->u.buffer.len);
 984
 985                 for(i = 0; i < tvp->u.buffer.len; i++)
 986                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
 987                                 ,__func__
 988                                 ,i
 989                                 ,tvp->u.buffer.data[i]);
 990
 991         } else
 992                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
 993 }
 994
 995 int is_legacy_delivery_system(fe_delivery_system_t s)
 996 {
 997         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
 998            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
 999            (s == SYS_ATSC))
1000                 return 1;
1001
1002         return 0;
1003 }
1004
1005 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1006  * drivers can use a single set_frontend tuning function, regardless of whether
1007  * it's being used for the legacy or new API, reducing code and complexity.
1008  */
1009 void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
1010 {
1011         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1012
1013         c->frequency = p->frequency;
1014         c->inversion = p->inversion;
1015
1016         switch (fe->ops.info.type) {
1017         case FE_QPSK:
1018                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1019                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1020                 c->symbol_rate = p->u.qpsk.symbol_rate;
1021                 c->fec_inner = p->u.qpsk.fec_inner;
1022                 c->delivery_system = SYS_DVBS;
1023                 break;
1024         case FE_QAM:
1025                 c->symbol_rate = p->u.qam.symbol_rate;
1026                 c->fec_inner = p->u.qam.fec_inner;
1027                 c->modulation = p->u.qam.modulation;
1028                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1029                 break;
1030         case FE_OFDM:
1031                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1032                         c->bandwidth_hz = 6000000;
1033                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1034                         c->bandwidth_hz = 7000000;
1035                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1036                         c->bandwidth_hz = 8000000;
1037                 else
1038                         /* Including BANDWIDTH_AUTO */
1039                         c->bandwidth_hz = 0;
1040                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1041                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1042                 c->modulation = p->u.ofdm.constellation;
1043                 c->transmission_mode = p->u.ofdm.transmission_mode;
1044                 c->guard_interval = p->u.ofdm.guard_interval;
1045                 c->hierarchy = p->u.ofdm.hierarchy_information;
1046                 c->delivery_system = SYS_DVBT;
1047                 break;
1048         case FE_ATSC:
1049                 c->modulation = p->u.vsb.modulation;
1050                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1051                         c->delivery_system = SYS_ATSC;
1052                 else
1053                         c->delivery_system = SYS_DVBC_ANNEX_B;
1054                 break;
1055         }
1056 }
1057
1058 /* Ensure the cached values are set correctly in the frontend
1059  * legacy tuning structures, for the advanced tuning API.
1060  */
1061 void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1062 {
1063         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1064         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1065         struct dvb_frontend_parameters *p = &fepriv->parameters;
1066
1067         p->frequency = c->frequency;
1068         p->inversion = c->inversion;
1069
1070         switch (fe->ops.info.type) {
1071         case FE_QPSK:
1072                 dprintk("%s() Preparing QPSK req\n", __func__);
1073                 p->u.qpsk.symbol_rate = c->symbol_rate;
1074                 p->u.qpsk.fec_inner = c->fec_inner;
1075                 c->delivery_system = SYS_DVBS;
1076                 break;
1077         case FE_QAM:
1078                 dprintk("%s() Preparing QAM req\n", __func__);
1079                 p->u.qam.symbol_rate = c->symbol_rate;
1080                 p->u.qam.fec_inner = c->fec_inner;
1081                 p->u.qam.modulation = c->modulation;
1082                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1083                 break;
1084         case FE_OFDM:
1085                 dprintk("%s() Preparing OFDM req\n", __func__);
1086                 if (c->bandwidth_hz == 6000000)
1087                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1088                 else if (c->bandwidth_hz == 7000000)
1089                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1090                 else if (c->bandwidth_hz == 8000000)
1091                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1092                 else
1093                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1094                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1095                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1096                 p->u.ofdm.constellation = c->modulation;
1097                 p->u.ofdm.transmission_mode = c->transmission_mode;
1098                 p->u.ofdm.guard_interval = c->guard_interval;
1099                 p->u.ofdm.hierarchy_information = c->hierarchy;
1100                 c->delivery_system = SYS_DVBT;
1101                 break;
1102         case FE_ATSC:
1103                 dprintk("%s() Preparing VSB req\n", __func__);
1104                 p->u.vsb.modulation = c->modulation;
1105                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1106                         c->delivery_system = SYS_ATSC;
1107                 else
1108                         c->delivery_system = SYS_DVBC_ANNEX_B;
1109                 break;
1110         }
1111 }
1112
1113 /* Ensure the cached values are set correctly in the frontend
1114  * legacy tuning structures, for the legacy tuning API.
1115  */
1116 void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1117 {
1118         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1119         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1120         struct dvb_frontend_parameters *p = &fepriv->parameters;
1121
1122         p->frequency = c->frequency;
1123         p->inversion = c->inversion;
1124
1125         switch(c->modulation) {
1126         case PSK_8:
1127         case APSK_16:
1128         case APSK_32:
1129         case QPSK:
1130                 p->u.qpsk.symbol_rate = c->symbol_rate;
1131                 p->u.qpsk.fec_inner = c->fec_inner;
1132                 break;
1133         default:
1134                 break;
1135         }
1136
1137         if(c->delivery_system == SYS_ISDBT) {
1138                 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1139                 p->frequency = c->frequency;
1140                 p->inversion = INVERSION_AUTO;
1141                 p->u.ofdm.constellation = QAM_AUTO;
1142                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1143                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1144                 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1145                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1146                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1147                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1148         }
1149 }
1150
1151 void dtv_property_cache_submit(struct dvb_frontend *fe)
1152 {
1153         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1154
1155         /* For legacy delivery systems we don't need the delivery_system to
1156          * be specified, but we populate the older structures from the cache
1157          * so we can call set_frontend on older drivers.
1158          */
1159         if(is_legacy_delivery_system(c->delivery_system)) {
1160
1161                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1162                 dtv_property_legacy_params_sync(fe);
1163
1164         } else {
1165                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1166
1167                 /* For advanced delivery systems / modulation types ...
1168                  * we seed the lecacy dvb_frontend_parameters structure
1169                  * so that the sanity checking code later in the IOCTL processing
1170                  * can validate our basic frequency ranges, symbolrates, modulation
1171                  * etc.
1172                  */
1173                 dtv_property_adv_params_sync(fe);
1174         }
1175 }
1176
1177 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1178                         unsigned int cmd, void *parg);
1179 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1180                         unsigned int cmd, void *parg);
1181
1182 int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp,
1183         struct inode *inode, struct file *file)
1184 {
1185         int r = 0;
1186
1187         dtv_property_dump(tvp);
1188
1189         /* Allow the frontend to validate incoming properties */
1190         if (fe->ops.get_property)
1191                 r = fe->ops.get_property(fe, tvp);
1192
1193         if (r < 0)
1194                 return r;
1195
1196         switch(tvp->cmd) {
1197         case DTV_FREQUENCY:
1198                 tvp->u.data = fe->dtv_property_cache.frequency;
1199                 break;
1200         case DTV_MODULATION:
1201                 tvp->u.data = fe->dtv_property_cache.modulation;
1202                 break;
1203         case DTV_BANDWIDTH_HZ:
1204                 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1205                 break;
1206         case DTV_INVERSION:
1207                 tvp->u.data = fe->dtv_property_cache.inversion;
1208                 break;
1209         case DTV_SYMBOL_RATE:
1210                 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1211                 break;
1212         case DTV_INNER_FEC:
1213                 tvp->u.data = fe->dtv_property_cache.fec_inner;
1214                 break;
1215         case DTV_PILOT:
1216                 tvp->u.data = fe->dtv_property_cache.pilot;
1217                 break;
1218         case DTV_ROLLOFF:
1219                 tvp->u.data = fe->dtv_property_cache.rolloff;
1220                 break;
1221         case DTV_DELIVERY_SYSTEM:
1222                 tvp->u.data = fe->dtv_property_cache.delivery_system;
1223                 break;
1224         case DTV_VOLTAGE:
1225                 tvp->u.data = fe->dtv_property_cache.voltage;
1226                 break;
1227         case DTV_TONE:
1228                 tvp->u.data = fe->dtv_property_cache.sectone;
1229                 break;
1230         case DTV_API_VERSION:
1231                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1232                 break;
1233         case DTV_CODE_RATE_HP:
1234                 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1235                 break;
1236         case DTV_CODE_RATE_LP:
1237                 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1238                 break;
1239         case DTV_GUARD_INTERVAL:
1240                 tvp->u.data = fe->dtv_property_cache.guard_interval;
1241                 break;
1242         case DTV_TRANSMISSION_MODE:
1243                 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1244                 break;
1245         case DTV_HIERARCHY:
1246                 tvp->u.data = fe->dtv_property_cache.hierarchy;
1247                 break;
1248         default:
1249                 r = -1;
1250         }
1251
1252         return r;
1253 }
1254
1255 int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp,
1256         struct inode *inode, struct file *file)
1257 {
1258         int r = 0;
1259         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1260         dtv_property_dump(tvp);
1261
1262         /* Allow the frontend to validate incoming properties */
1263         if (fe->ops.set_property)
1264                 r = fe->ops.set_property(fe, tvp);
1265
1266         if (r < 0)
1267                 return r;
1268
1269         switch(tvp->cmd) {
1270         case DTV_CLEAR:
1271                 /* Reset a cache of data specific to the frontend here. This does
1272                  * not effect hardware.
1273                  */
1274                 dprintk("%s() Flushing property cache\n", __func__);
1275                 memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1276                 fe->dtv_property_cache.state = tvp->cmd;
1277                 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1278                 break;
1279         case DTV_TUNE:
1280                 /* interpret the cache of data, build either a traditional frontend
1281                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1282                  * ioctl.
1283                  */
1284                 fe->dtv_property_cache.state = tvp->cmd;
1285                 dprintk("%s() Finalised property cache\n", __func__);
1286                 dtv_property_cache_submit(fe);
1287
1288                 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1289                         &fepriv->parameters);
1290                 break;
1291         case DTV_FREQUENCY:
1292                 fe->dtv_property_cache.frequency = tvp->u.data;
1293                 break;
1294         case DTV_MODULATION:
1295                 fe->dtv_property_cache.modulation = tvp->u.data;
1296                 break;
1297         case DTV_BANDWIDTH_HZ:
1298                 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1299                 break;
1300         case DTV_INVERSION:
1301                 fe->dtv_property_cache.inversion = tvp->u.data;
1302                 break;
1303         case DTV_SYMBOL_RATE:
1304                 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1305                 break;
1306         case DTV_INNER_FEC:
1307                 fe->dtv_property_cache.fec_inner = tvp->u.data;
1308                 break;
1309         case DTV_PILOT:
1310                 fe->dtv_property_cache.pilot = tvp->u.data;
1311                 break;
1312         case DTV_ROLLOFF:
1313                 fe->dtv_property_cache.rolloff = tvp->u.data;
1314                 break;
1315         case DTV_DELIVERY_SYSTEM:
1316                 fe->dtv_property_cache.delivery_system = tvp->u.data;
1317                 break;
1318         case DTV_VOLTAGE:
1319                 fe->dtv_property_cache.voltage = tvp->u.data;
1320                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1321                         (void *)fe->dtv_property_cache.voltage);
1322                 break;
1323         case DTV_TONE:
1324                 fe->dtv_property_cache.sectone = tvp->u.data;
1325                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1326                         (void *)fe->dtv_property_cache.sectone);
1327                 break;
1328         case DTV_CODE_RATE_HP:
1329                 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1330                 break;
1331         case DTV_CODE_RATE_LP:
1332                 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1333                 break;
1334         case DTV_GUARD_INTERVAL:
1335                 fe->dtv_property_cache.guard_interval = tvp->u.data;
1336                 break;
1337         case DTV_TRANSMISSION_MODE:
1338                 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1339                 break;
1340         case DTV_HIERARCHY:
1341                 fe->dtv_property_cache.hierarchy = tvp->u.data;
1342                 break;
1343         default:
1344                 r = -1;
1345         }
1346
1347         return r;
1348 }
1349
1350 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1351                         unsigned int cmd, void *parg)
1352 {
1353         struct dvb_device *dvbdev = file->private_data;
1354         struct dvb_frontend *fe = dvbdev->priv;
1355         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1356         int err = -EOPNOTSUPP;
1357
1358         dprintk ("%s\n", __func__);
1359
1360         if (fepriv->exit)
1361                 return -ENODEV;
1362
1363         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1364             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1365              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1366                 return -EPERM;
1367
1368         if (down_interruptible (&fepriv->sem))
1369                 return -ERESTARTSYS;
1370
1371         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1372                 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1373         else {
1374                 fe->dtv_property_cache.state = DTV_UNDEFINED;
1375                 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1376         }
1377
1378         up(&fepriv->sem);
1379         return err;
1380 }
1381
1382 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1383                         unsigned int cmd, void *parg)
1384 {
1385         struct dvb_device *dvbdev = file->private_data;
1386         struct dvb_frontend *fe = dvbdev->priv;
1387         int err = 0;
1388
1389         struct dtv_properties *tvps = NULL;
1390         struct dtv_property *tvp = NULL;
1391         int i;
1392
1393         dprintk("%s\n", __func__);
1394
1395         if(cmd == FE_SET_PROPERTY) {
1396                 tvps = (struct dtv_properties __user *)parg;
1397
1398                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1399                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1400
1401                 /* Put an arbitrary limit on the number of messages that can
1402                  * be sent at once */
1403                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1404                         return -EINVAL;
1405
1406                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1407                         sizeof(struct dtv_property), GFP_KERNEL);
1408                 if (!tvp) {
1409                         err = -ENOMEM;
1410                         goto out;
1411                 }
1412
1413                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1414                         err = -EFAULT;
1415                         goto out;
1416                 }
1417
1418                 for (i = 0; i < tvps->num; i++) {
1419                         (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1420                         err |= (tvp + i)->result;
1421                 }
1422
1423                 if(fe->dtv_property_cache.state == DTV_TUNE)
1424                         dprintk("%s() Property cache is full, tuning\n", __func__);
1425
1426         } else
1427         if(cmd == FE_GET_PROPERTY) {
1428
1429                 tvps = (struct dtv_properties __user *)parg;
1430
1431                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1432                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1433
1434                 /* Put an arbitrary limit on the number of messages that can
1435                  * be sent at once */
1436                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1437                         return -EINVAL;
1438
1439                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1440                         sizeof(struct dtv_property), GFP_KERNEL);
1441                 if (!tvp) {
1442                         err = -ENOMEM;
1443                         goto out;
1444                 }
1445
1446                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1447                         err = -EFAULT;
1448                         goto out;
1449                 }
1450
1451                 for (i = 0; i < tvps->num; i++) {
1452                         (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1453                         err |= (tvp + i)->result;
1454                 }
1455
1456                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1457                         err = -EFAULT;
1458                         goto out;
1459                 }
1460
1461         } else
1462                 err = -EOPNOTSUPP;
1463
1464 out:
1465         kfree(tvp);
1466         return err;
1467 }
1468
1469 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1470                         unsigned int cmd, void *parg)
1471 {
1472         struct dvb_device *dvbdev = file->private_data;
1473         struct dvb_frontend *fe = dvbdev->priv;
1474         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1475         int err = -EOPNOTSUPP;
1476
1477         switch (cmd) {
1478         case FE_GET_INFO: {
1479                 struct dvb_frontend_info* info = parg;
1480                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1481                 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1482
1483                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1484                  * do it, it is done for it. */
1485                 info->caps |= FE_CAN_INVERSION_AUTO;
1486                 err = 0;
1487                 break;
1488         }
1489
1490         case FE_READ_STATUS: {
1491                 fe_status_t* status = parg;
1492
1493                 /* if retune was requested but hasn't occured yet, prevent
1494                  * that user get signal state from previous tuning */
1495                 if(fepriv->state == FESTATE_RETUNE) {
1496                         err=0;
1497                         *status = 0;
1498                         break;
1499                 }
1500
1501                 if (fe->ops.read_status)
1502                         err = fe->ops.read_status(fe, status);
1503                 break;
1504         }
1505         case FE_READ_BER:
1506                 if (fe->ops.read_ber)
1507                         err = fe->ops.read_ber(fe, (__u32*) parg);
1508                 break;
1509
1510         case FE_READ_SIGNAL_STRENGTH:
1511                 if (fe->ops.read_signal_strength)
1512                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1513                 break;
1514
1515         case FE_READ_SNR:
1516                 if (fe->ops.read_snr)
1517                         err = fe->ops.read_snr(fe, (__u16*) parg);
1518                 break;
1519
1520         case FE_READ_UNCORRECTED_BLOCKS:
1521                 if (fe->ops.read_ucblocks)
1522                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1523                 break;
1524
1525
1526         case FE_DISEQC_RESET_OVERLOAD:
1527                 if (fe->ops.diseqc_reset_overload) {
1528                         err = fe->ops.diseqc_reset_overload(fe);
1529                         fepriv->state = FESTATE_DISEQC;
1530                         fepriv->status = 0;
1531                 }
1532                 break;
1533
1534         case FE_DISEQC_SEND_MASTER_CMD:
1535                 if (fe->ops.diseqc_send_master_cmd) {
1536                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1537                         fepriv->state = FESTATE_DISEQC;
1538                         fepriv->status = 0;
1539                 }
1540                 break;
1541
1542         case FE_DISEQC_SEND_BURST:
1543                 if (fe->ops.diseqc_send_burst) {
1544                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1545                         fepriv->state = FESTATE_DISEQC;
1546                         fepriv->status = 0;
1547                 }
1548                 break;
1549
1550         case FE_SET_TONE:
1551                 if (fe->ops.set_tone) {
1552                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1553                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1554                         fepriv->state = FESTATE_DISEQC;
1555                         fepriv->status = 0;
1556                 }
1557                 break;
1558
1559         case FE_SET_VOLTAGE:
1560                 if (fe->ops.set_voltage) {
1561                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1562                         fepriv->voltage = (fe_sec_voltage_t) parg;
1563                         fepriv->state = FESTATE_DISEQC;
1564                         fepriv->status = 0;
1565                 }
1566                 break;
1567
1568         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1569                 if (fe->ops.dishnetwork_send_legacy_command) {
1570                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1571                         fepriv->state = FESTATE_DISEQC;
1572                         fepriv->status = 0;
1573                 } else if (fe->ops.set_voltage) {
1574                         /*
1575                          * NOTE: This is a fallback condition.  Some frontends
1576                          * (stv0299 for instance) take longer than 8msec to
1577                          * respond to a set_voltage command.  Those switches
1578                          * need custom routines to switch properly.  For all
1579                          * other frontends, the following shoule work ok.
1580                          * Dish network legacy switches (as used by Dish500)
1581                          * are controlled by sending 9-bit command words
1582                          * spaced 8msec apart.
1583                          * the actual command word is switch/port dependant
1584                          * so it is up to the userspace application to send
1585                          * the right command.
1586                          * The command must always start with a '0' after
1587                          * initialization, so parg is 8 bits and does not
1588                          * include the initialization or start bit
1589                          */
1590                         unsigned long swcmd = ((unsigned long) parg) << 1;
1591                         struct timeval nexttime;
1592                         struct timeval tv[10];
1593                         int i;
1594                         u8 last = 1;
1595                         if (dvb_frontend_debug)
1596                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1597                         do_gettimeofday(&nexttime);
1598                         if (dvb_frontend_debug)
1599                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1600                         /* before sending a command, initialize by sending
1601                          * a 32ms 18V to the switch
1602                          */
1603                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1604                         dvb_frontend_sleep_until(&nexttime, 32000);
1605
1606                         for (i = 0; i < 9; i++) {
1607                                 if (dvb_frontend_debug)
1608                                         do_gettimeofday(&tv[i + 1]);
1609                                 if ((swcmd & 0x01) != last) {
1610                                         /* set voltage to (last ? 13V : 18V) */
1611                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1612                                         last = (last) ? 0 : 1;
1613                                 }
1614                                 swcmd = swcmd >> 1;
1615                                 if (i != 8)
1616                                         dvb_frontend_sleep_until(&nexttime, 8000);
1617                         }
1618                         if (dvb_frontend_debug) {
1619                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1620                                         __func__, fe->dvb->num);
1621                                 for (i = 1; i < 10; i++)
1622                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1623                         }
1624                         err = 0;
1625                         fepriv->state = FESTATE_DISEQC;
1626                         fepriv->status = 0;
1627                 }
1628                 break;
1629
1630         case FE_DISEQC_RECV_SLAVE_REPLY:
1631                 if (fe->ops.diseqc_recv_slave_reply)
1632                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1633                 break;
1634
1635         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1636                 if (fe->ops.enable_high_lnb_voltage)
1637                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1638                 break;
1639
1640         case FE_SET_FRONTEND: {
1641                 struct dvb_frontend_tune_settings fetunesettings;
1642
1643                 if(fe->dtv_property_cache.state == DTV_TUNE) {
1644                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1645                                 err = -EINVAL;
1646                                 break;
1647                         }
1648                 } else {
1649                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1650                                 err = -EINVAL;
1651                                 break;
1652                         }
1653
1654                         memcpy (&fepriv->parameters, parg,
1655                                 sizeof (struct dvb_frontend_parameters));
1656                         dtv_property_cache_sync(fe, &fepriv->parameters);
1657                 }
1658
1659                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1660                 memcpy(&fetunesettings.parameters, parg,
1661                        sizeof (struct dvb_frontend_parameters));
1662
1663                 /* force auto frequency inversion if requested */
1664                 if (dvb_force_auto_inversion) {
1665                         fepriv->parameters.inversion = INVERSION_AUTO;
1666                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1667                 }
1668                 if (fe->ops.info.type == FE_OFDM) {
1669                         /* without hierarchical coding code_rate_LP is irrelevant,
1670                          * so we tolerate the otherwise invalid FEC_NONE setting */
1671                         if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1672                             fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1673                                 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1674                 }
1675
1676                 /* get frontend-specific tuning settings */
1677                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1678                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1679                         fepriv->max_drift = fetunesettings.max_drift;
1680                         fepriv->step_size = fetunesettings.step_size;
1681                 } else {
1682                         /* default values */
1683                         switch(fe->ops.info.type) {
1684                         case FE_QPSK:
1685                                 fepriv->min_delay = HZ/20;
1686                                 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1687                                 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1688                                 break;
1689
1690                         case FE_QAM:
1691                                 fepriv->min_delay = HZ/20;
1692                                 fepriv->step_size = 0; /* no zigzag */
1693                                 fepriv->max_drift = 0;
1694                                 break;
1695
1696                         case FE_OFDM:
1697                                 fepriv->min_delay = HZ/20;
1698                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1699                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1700                                 break;
1701                         case FE_ATSC:
1702                                 fepriv->min_delay = HZ/20;
1703                                 fepriv->step_size = 0;
1704                                 fepriv->max_drift = 0;
1705                                 break;
1706                         }
1707                 }
1708                 if (dvb_override_tune_delay > 0)
1709                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1710
1711                 fepriv->state = FESTATE_RETUNE;
1712                 dvb_frontend_wakeup(fe);
1713                 dvb_frontend_add_event(fe, 0);
1714                 fepriv->status = 0;
1715                 err = 0;
1716                 break;
1717         }
1718
1719         case FE_GET_EVENT:
1720                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1721                 break;
1722
1723         case FE_GET_FRONTEND:
1724                 if (fe->ops.get_frontend) {
1725                         memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1726                         err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1727                 }
1728                 break;
1729
1730         case FE_SET_FRONTEND_TUNE_MODE:
1731                 fepriv->tune_mode_flags = (unsigned long) parg;
1732                 err = 0;
1733                 break;
1734         };
1735
1736         return err;
1737 }
1738
1739
1740 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1741 {
1742         struct dvb_device *dvbdev = file->private_data;
1743         struct dvb_frontend *fe = dvbdev->priv;
1744         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1745
1746         dprintk ("%s\n", __func__);
1747
1748         poll_wait (file, &fepriv->events.wait_queue, wait);
1749
1750         if (fepriv->events.eventw != fepriv->events.eventr)
1751                 return (POLLIN | POLLRDNORM | POLLPRI);
1752
1753         return 0;
1754 }
1755
1756 static int dvb_frontend_open(struct inode *inode, struct file *file)
1757 {
1758         struct dvb_device *dvbdev = file->private_data;
1759         struct dvb_frontend *fe = dvbdev->priv;
1760         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1761         struct dvb_adapter *adapter = fe->dvb;
1762         int ret;
1763
1764         dprintk ("%s\n", __func__);
1765
1766         if (adapter->mfe_shared) {
1767                 mutex_lock (&adapter->mfe_lock);
1768
1769                 if (adapter->mfe_dvbdev == NULL)
1770                         adapter->mfe_dvbdev = dvbdev;
1771
1772                 else if (adapter->mfe_dvbdev != dvbdev) {
1773                         struct dvb_device
1774                                 *mfedev = adapter->mfe_dvbdev;
1775                         struct dvb_frontend
1776                                 *mfe = mfedev->priv;
1777                         struct dvb_frontend_private
1778                                 *mfepriv = mfe->frontend_priv;
1779                         int mferetry = (dvb_mfe_wait_time << 1);
1780
1781                         mutex_unlock (&adapter->mfe_lock);
1782                         while (mferetry-- && (mfedev->users != -1 ||
1783                                         mfepriv->thread != NULL)) {
1784                                 if(msleep_interruptible(500)) {
1785                                         if(signal_pending(current))
1786                                                 return -EINTR;
1787                                 }
1788                         }
1789
1790                         mutex_lock (&adapter->mfe_lock);
1791                         if(adapter->mfe_dvbdev != dvbdev) {
1792                                 mfedev = adapter->mfe_dvbdev;
1793                                 mfe = mfedev->priv;
1794                                 mfepriv = mfe->frontend_priv;
1795                                 if (mfedev->users != -1 ||
1796                                                 mfepriv->thread != NULL) {
1797                                         mutex_unlock (&adapter->mfe_lock);
1798                                         return -EBUSY;
1799                                 }
1800                                 adapter->mfe_dvbdev = dvbdev;
1801                         }
1802                 }
1803         }
1804
1805         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1806                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1807                         goto err0;
1808         }
1809
1810         if ((ret = dvb_generic_open (inode, file)) < 0)
1811                 goto err1;
1812
1813         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1814                 /* normal tune mode when opened R/W */
1815                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1816                 fepriv->tone = -1;
1817                 fepriv->voltage = -1;
1818
1819                 ret = dvb_frontend_start (fe);
1820                 if (ret)
1821                         goto err2;
1822
1823                 /*  empty event queue */
1824                 fepriv->events.eventr = fepriv->events.eventw = 0;
1825         }
1826
1827         if (adapter->mfe_shared)
1828                 mutex_unlock (&adapter->mfe_lock);
1829         return ret;
1830
1831 err2:
1832         dvb_generic_release(inode, file);
1833 err1:
1834         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1835                 fe->ops.ts_bus_ctrl(fe, 0);
1836 err0:
1837         if (adapter->mfe_shared)
1838                 mutex_unlock (&adapter->mfe_lock);
1839         return ret;
1840 }
1841
1842 static int dvb_frontend_release(struct inode *inode, struct file *file)
1843 {
1844         struct dvb_device *dvbdev = file->private_data;
1845         struct dvb_frontend *fe = dvbdev->priv;
1846         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1847         int ret;
1848
1849         dprintk ("%s\n", __func__);
1850
1851         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
1852                 fepriv->release_jiffies = jiffies;
1853
1854         ret = dvb_generic_release (inode, file);
1855
1856         if (dvbdev->users == -1) {
1857                 if (fepriv->exit == 1) {
1858                         fops_put(file->f_op);
1859                         file->f_op = NULL;
1860                         wake_up(&dvbdev->wait_queue);
1861                 }
1862                 if (fe->ops.ts_bus_ctrl)
1863                         fe->ops.ts_bus_ctrl(fe, 0);
1864         }
1865
1866         return ret;
1867 }
1868
1869 static struct file_operations dvb_frontend_fops = {
1870         .owner          = THIS_MODULE,
1871         .ioctl          = dvb_generic_ioctl,
1872         .poll           = dvb_frontend_poll,
1873         .open           = dvb_frontend_open,
1874         .release        = dvb_frontend_release
1875 };
1876
1877 int dvb_register_frontend(struct dvb_adapter* dvb,
1878                           struct dvb_frontend* fe)
1879 {
1880         struct dvb_frontend_private *fepriv;
1881         static const struct dvb_device dvbdev_template = {
1882                 .users = ~0,
1883                 .writers = 1,
1884                 .readers = (~0)-1,
1885                 .fops = &dvb_frontend_fops,
1886                 .kernel_ioctl = dvb_frontend_ioctl
1887         };
1888
1889         dprintk ("%s\n", __func__);
1890
1891         if (mutex_lock_interruptible(&frontend_mutex))
1892                 return -ERESTARTSYS;
1893
1894         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
1895         if (fe->frontend_priv == NULL) {
1896                 mutex_unlock(&frontend_mutex);
1897                 return -ENOMEM;
1898         }
1899         fepriv = fe->frontend_priv;
1900
1901         init_MUTEX (&fepriv->sem);
1902         init_waitqueue_head (&fepriv->wait_queue);
1903         init_waitqueue_head (&fepriv->events.wait_queue);
1904         mutex_init(&fepriv->events.mtx);
1905         fe->dvb = dvb;
1906         fepriv->inversion = INVERSION_OFF;
1907
1908         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
1909                 fe->dvb->num,
1910                 fe->id,
1911                 fe->ops.info.name);
1912
1913         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
1914                              fe, DVB_DEVICE_FRONTEND);
1915
1916         mutex_unlock(&frontend_mutex);
1917         return 0;
1918 }
1919 EXPORT_SYMBOL(dvb_register_frontend);
1920
1921 int dvb_unregister_frontend(struct dvb_frontend* fe)
1922 {
1923         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1924         dprintk ("%s\n", __func__);
1925
1926         mutex_lock(&frontend_mutex);
1927         dvb_frontend_stop (fe);
1928         mutex_unlock(&frontend_mutex);
1929
1930         if (fepriv->dvbdev->users < -1)
1931                 wait_event(fepriv->dvbdev->wait_queue,
1932                                 fepriv->dvbdev->users==-1);
1933
1934         mutex_lock(&frontend_mutex);
1935         dvb_unregister_device (fepriv->dvbdev);
1936
1937         /* fe is invalid now */
1938         kfree(fepriv);
1939         mutex_unlock(&frontend_mutex);
1940         return 0;
1941 }
1942 EXPORT_SYMBOL(dvb_unregister_frontend);
1943
1944 #ifdef CONFIG_MEDIA_ATTACH
1945 void dvb_frontend_detach(struct dvb_frontend* fe)
1946 {
1947         void *ptr;
1948
1949         if (fe->ops.release_sec) {
1950                 fe->ops.release_sec(fe);
1951                 symbol_put_addr(fe->ops.release_sec);
1952         }
1953         if (fe->ops.tuner_ops.release) {
1954                 fe->ops.tuner_ops.release(fe);
1955                 symbol_put_addr(fe->ops.tuner_ops.release);
1956         }
1957         if (fe->ops.analog_ops.release) {
1958                 fe->ops.analog_ops.release(fe);
1959                 symbol_put_addr(fe->ops.analog_ops.release);
1960         }
1961         ptr = (void*)fe->ops.release;
1962         if (ptr) {
1963                 fe->ops.release(fe);
1964                 symbol_put_addr(ptr);
1965         }
1966 }
1967 #else
1968 void dvb_frontend_detach(struct dvb_frontend* fe)
1969 {
1970         if (fe->ops.release_sec)
1971                 fe->ops.release_sec(fe);
1972         if (fe->ops.tuner_ops.release)
1973                 fe->ops.tuner_ops.release(fe);
1974         if (fe->ops.analog_ops.release)
1975                 fe->ops.analog_ops.release(fe);
1976         if (fe->ops.release)
1977                 fe->ops.release(fe);
1978 }
1979 #endif
1980 EXPORT_SYMBOL(dvb_frontend_detach);