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/semaphore.h>
  35 #include <linux/module.h>
  36 #include <linux/list.h>
  37 #include <linux/freezer.h>
  38 #include <linux/jiffies.h>
  39 #include <linux/kthread.h>
  40 #include <asm/processor.h>
  41
  42 #include "dvb_frontend.h"
  43 #include "dvbdev.h"
  44 #include <linux/dvb/version.h>
  45
  46 static int dvb_frontend_debug;
  47 static int dvb_shutdown_timeout;
  48 static int dvb_force_auto_inversion;
  49 static int dvb_override_tune_delay;
  50 static int dvb_powerdown_on_sleep = 1;
  51 static int dvb_mfe_wait_time = 5;
  52
  53 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  54 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  55 module_param(dvb_shutdown_timeout, int, 0644);
  56 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  57 module_param(dvb_force_auto_inversion, int, 0644);
  58 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  59 module_param(dvb_override_tune_delay, int, 0644);
  60 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  61 module_param(dvb_powerdown_on_sleep, int, 0644);
  62 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  63 module_param(dvb_mfe_wait_time, int, 0644);
  64 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)");
  65
  66 #define dprintk if (dvb_frontend_debug) printk
  67
  68 #define FESTATE_IDLE 1
  69 #define FESTATE_RETUNE 2
  70 #define FESTATE_TUNING_FAST 4
  71 #define FESTATE_TUNING_SLOW 8
  72 #define FESTATE_TUNED 16
  73 #define FESTATE_ZIGZAG_FAST 32
  74 #define FESTATE_ZIGZAG_SLOW 64
  75 #define FESTATE_DISEQC 128
  76 #define FESTATE_ERROR 256
  77 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  78 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  79 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  80 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  81
  82 #define FE_ALGO_HW              1
  83 /*
  84  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  85  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  86  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  87  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  88  * FESTATE_TUNED. The frontend has successfully locked on.
  89  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  90  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  91  * FESTATE_DISEQC. A DISEQC command has just been issued.
  92  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  93  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  94  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  95  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  96  */
  97
  98 static DEFINE_MUTEX(frontend_mutex);
  99
 100 struct dvb_frontend_private {
 101
 102         /* thread/frontend values */
 103         struct dvb_device *dvbdev;
 104         struct dvb_frontend_parameters parameters;
 105         struct dvb_fe_events events;
 106         struct semaphore sem;
 107         struct list_head list_head;
 108         wait_queue_head_t wait_queue;
 109         struct task_struct *thread;
 110         unsigned long release_jiffies;
 111         unsigned int exit;
 112         unsigned int wakeup;
 113         fe_status_t status;
 114         unsigned long tune_mode_flags;
 115         unsigned int delay;
 116         unsigned int reinitialise;
 117         int tone;
 118         int voltage;
 119
 120         /* swzigzag values */
 121         unsigned int state;
 122         unsigned int bending;
 123         int lnb_drift;
 124         unsigned int inversion;
 125         unsigned int auto_step;
 126         unsigned int auto_sub_step;
 127         unsigned int started_auto_step;
 128         unsigned int min_delay;
 129         unsigned int max_drift;
 130         unsigned int step_size;
 131         int quality;
 132         unsigned int check_wrapped;
 133         enum dvbfe_search algo_status;
 134 };
 135
 136 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 137
 138 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 139 {
 140         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 141         struct dvb_fe_events *events = &fepriv->events;
 142         struct dvb_frontend_event *e;
 143         int wp;
 144
 145         dprintk ("%s\n", __func__);
 146
 147         if (mutex_lock_interruptible (&events->mtx))
 148                 return;
 149
 150         wp = (events->eventw + 1) % MAX_EVENT;
 151
 152         if (wp == events->eventr) {
 153                 events->overflow = 1;
 154                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 155         }
 156
 157         e = &events->events[events->eventw];
 158
 159         memcpy (&e->parameters, &fepriv->parameters,
 160                 sizeof (struct dvb_frontend_parameters));
 161
 162         if (status & FE_HAS_LOCK)
 163                 if (fe->ops.get_frontend)
 164                         fe->ops.get_frontend(fe, &e->parameters);
 165
 166         events->eventw = wp;
 167
 168         mutex_unlock(&events->mtx);
 169
 170         e->status = status;
 171
 172         wake_up_interruptible (&events->wait_queue);
 173 }
 174
 175 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 176                             struct dvb_frontend_event *event, int flags)
 177 {
 178         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 179         struct dvb_fe_events *events = &fepriv->events;
 180
 181         dprintk ("%s\n", __func__);
 182
 183         if (events->overflow) {
 184                 events->overflow = 0;
 185                 return -EOVERFLOW;
 186         }
 187
 188         if (events->eventw == events->eventr) {
 189                 int ret;
 190
 191                 if (flags & O_NONBLOCK)
 192                         return -EWOULDBLOCK;
 193
 194                 up(&fepriv->sem);
 195
 196                 ret = wait_event_interruptible (events->wait_queue,
 197                                                 events->eventw != events->eventr);
 198
 199                 if (down_interruptible (&fepriv->sem))
 200                         return -ERESTARTSYS;
 201
 202                 if (ret < 0)
 203                         return ret;
 204         }
 205
 206         if (mutex_lock_interruptible (&events->mtx))
 207                 return -ERESTARTSYS;
 208
 209         memcpy (event, &events->events[events->eventr],
 210                 sizeof(struct dvb_frontend_event));
 211
 212         events->eventr = (events->eventr + 1) % MAX_EVENT;
 213
 214         mutex_unlock(&events->mtx);
 215
 216         return 0;
 217 }
 218
 219 static void dvb_frontend_init(struct dvb_frontend *fe)
 220 {
 221         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 222                  fe->dvb->num,
 223                  fe->id,
 224                  fe->ops.info.name);
 225
 226         if (fe->ops.init)
 227                 fe->ops.init(fe);
 228         if (fe->ops.tuner_ops.init) {
 229                 if (fe->ops.i2c_gate_ctrl)
 230                         fe->ops.i2c_gate_ctrl(fe, 1);
 231                 fe->ops.tuner_ops.init(fe);
 232                 if (fe->ops.i2c_gate_ctrl)
 233                         fe->ops.i2c_gate_ctrl(fe, 0);
 234         }
 235 }
 236
 237 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 238 {
 239         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 240
 241         fepriv->reinitialise = 1;
 242         dvb_frontend_wakeup(fe);
 243 }
 244 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 245
 246 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 247 {
 248         int q2;
 249
 250         dprintk ("%s\n", __func__);
 251
 252         if (locked)
 253                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 254         else
 255                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 256
 257         q2 = fepriv->quality - 128;
 258         q2 *= q2;
 259
 260         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 261 }
 262
 263 /**
 264  * Performs automatic twiddling of frontend parameters.
 265  *
 266  * @param fe The frontend concerned.
 267  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 268  * @returns Number of complete iterations that have been performed.
 269  */
 270 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 271 {
 272         int autoinversion;
 273         int ready = 0;
 274         int fe_set_err = 0;
 275         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 276         int original_inversion = fepriv->parameters.inversion;
 277         u32 original_frequency = fepriv->parameters.frequency;
 278
 279         /* are we using autoinversion? */
 280         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 281                          (fepriv->parameters.inversion == INVERSION_AUTO));
 282
 283         /* setup parameters correctly */
 284         while(!ready) {
 285                 /* calculate the lnb_drift */
 286                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 287
 288                 /* wrap the auto_step if we've exceeded the maximum drift */
 289                 if (fepriv->lnb_drift > fepriv->max_drift) {
 290                         fepriv->auto_step = 0;
 291                         fepriv->auto_sub_step = 0;
 292                         fepriv->lnb_drift = 0;
 293                 }
 294
 295                 /* perform inversion and +/- zigzag */
 296                 switch(fepriv->auto_sub_step) {
 297                 case 0:
 298                         /* try with the current inversion and current drift setting */
 299                         ready = 1;
 300                         break;
 301
 302                 case 1:
 303                         if (!autoinversion) break;
 304
 305                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 306                         ready = 1;
 307                         break;
 308
 309                 case 2:
 310                         if (fepriv->lnb_drift == 0) break;
 311
 312                         fepriv->lnb_drift = -fepriv->lnb_drift;
 313                         ready = 1;
 314                         break;
 315
 316                 case 3:
 317                         if (fepriv->lnb_drift == 0) break;
 318                         if (!autoinversion) break;
 319
 320                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 321                         fepriv->lnb_drift = -fepriv->lnb_drift;
 322                         ready = 1;
 323                         break;
 324
 325                 default:
 326                         fepriv->auto_step++;
 327                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 328                         break;
 329                 }
 330
 331                 if (!ready) fepriv->auto_sub_step++;
 332         }
 333
 334         /* if this attempt would hit where we started, indicate a complete
 335          * iteration has occurred */
 336         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 337             (fepriv->auto_sub_step == 0) && check_wrapped) {
 338                 return 1;
 339         }
 340
 341         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 342                 "auto_sub_step:%i started_auto_step:%i\n",
 343                 __func__, fepriv->lnb_drift, fepriv->inversion,
 344                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 345
 346         /* set the frontend itself */
 347         fepriv->parameters.frequency += fepriv->lnb_drift;
 348         if (autoinversion)
 349                 fepriv->parameters.inversion = fepriv->inversion;
 350         if (fe->ops.set_frontend)
 351                 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
 352         if (fe_set_err < 0) {
 353                 fepriv->state = FESTATE_ERROR;
 354                 return fe_set_err;
 355         }
 356
 357         fepriv->parameters.frequency = original_frequency;
 358         fepriv->parameters.inversion = original_inversion;
 359
 360         fepriv->auto_sub_step++;
 361         return 0;
 362 }
 363
 364 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 365 {
 366         fe_status_t s = 0;
 367         int retval = 0;
 368         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 369
 370         /* if we've got no parameters, just keep idling */
 371         if (fepriv->state & FESTATE_IDLE) {
 372                 fepriv->delay = 3*HZ;
 373                 fepriv->quality = 0;
 374                 return;
 375         }
 376
 377         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 378         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 379                 if (fepriv->state & FESTATE_RETUNE) {
 380                         if (fe->ops.set_frontend)
 381                                 retval = fe->ops.set_frontend(fe,
 382                                                         &fepriv->parameters);
 383                         if (retval < 0)
 384                                 fepriv->state = FESTATE_ERROR;
 385                         else
 386                                 fepriv->state = FESTATE_TUNED;
 387                 }
 388                 fepriv->delay = 3*HZ;
 389                 fepriv->quality = 0;
 390                 return;
 391         }
 392
 393         /* get the frontend status */
 394         if (fepriv->state & FESTATE_RETUNE) {
 395                 s = 0;
 396         } else {
 397                 if (fe->ops.read_status)
 398                         fe->ops.read_status(fe, &s);
 399                 if (s != fepriv->status) {
 400                         dvb_frontend_add_event(fe, s);
 401                         fepriv->status = s;
 402                 }
 403         }
 404
 405         /* if we're not tuned, and we have a lock, move to the TUNED state */
 406         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 407                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 408                 fepriv->state = FESTATE_TUNED;
 409
 410                 /* if we're tuned, then we have determined the correct inversion */
 411                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 412                     (fepriv->parameters.inversion == INVERSION_AUTO)) {
 413                         fepriv->parameters.inversion = fepriv->inversion;
 414                 }
 415                 return;
 416         }
 417
 418         /* if we are tuned already, check we're still locked */
 419         if (fepriv->state & FESTATE_TUNED) {
 420                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 421
 422                 /* we're tuned, and the lock is still good... */
 423                 if (s & FE_HAS_LOCK) {
 424                         return;
 425                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 426                         fepriv->state = FESTATE_ZIGZAG_FAST;
 427                         fepriv->started_auto_step = fepriv->auto_step;
 428                         fepriv->check_wrapped = 0;
 429                 }
 430         }
 431
 432         /* don't actually do anything if we're in the LOSTLOCK state,
 433          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 434         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 435             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 436                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 437                 return;
 438         }
 439
 440         /* don't do anything if we're in the DISEQC state, since this
 441          * might be someone with a motorized dish controlled by DISEQC.
 442          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 443         if (fepriv->state & FESTATE_DISEQC) {
 444                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 445                 return;
 446         }
 447
 448         /* if we're in the RETUNE state, set everything up for a brand
 449          * new scan, keeping the current inversion setting, as the next
 450          * tune is _very_ likely to require the same */
 451         if (fepriv->state & FESTATE_RETUNE) {
 452                 fepriv->lnb_drift = 0;
 453                 fepriv->auto_step = 0;
 454                 fepriv->auto_sub_step = 0;
 455                 fepriv->started_auto_step = 0;
 456                 fepriv->check_wrapped = 0;
 457         }
 458
 459         /* fast zigzag. */
 460         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 461                 fepriv->delay = fepriv->min_delay;
 462
 463                 /* peform a tune */
 464                 retval = dvb_frontend_swzigzag_autotune(fe,
 465                                                         fepriv->check_wrapped);
 466                 if (retval < 0) {
 467                         return;
 468                 } else if (retval) {
 469                         /* OK, if we've run out of trials at the fast speed.
 470                          * Drop back to slow for the _next_ attempt */
 471                         fepriv->state = FESTATE_SEARCHING_SLOW;
 472                         fepriv->started_auto_step = fepriv->auto_step;
 473                         return;
 474                 }
 475                 fepriv->check_wrapped = 1;
 476
 477                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 478                  * This ensures we cannot return from an
 479                  * FE_SET_FRONTEND ioctl before the first frontend tune
 480                  * occurs */
 481                 if (fepriv->state & FESTATE_RETUNE) {
 482                         fepriv->state = FESTATE_TUNING_FAST;
 483                 }
 484         }
 485
 486         /* slow zigzag */
 487         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 488                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 489
 490                 /* Note: don't bother checking for wrapping; we stay in this
 491                  * state until we get a lock */
 492                 dvb_frontend_swzigzag_autotune(fe, 0);
 493         }
 494 }
 495
 496 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 497 {
 498         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 499
 500         if (fepriv->exit)
 501                 return 1;
 502
 503         if (fepriv->dvbdev->writers == 1)
 504                 if (time_after(jiffies, fepriv->release_jiffies +
 505                                   dvb_shutdown_timeout * HZ))
 506                         return 1;
 507
 508         return 0;
 509 }
 510
 511 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 512 {
 513         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 514
 515         if (fepriv->wakeup) {
 516                 fepriv->wakeup = 0;
 517                 return 1;
 518         }
 519         return dvb_frontend_is_exiting(fe);
 520 }
 521
 522 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 523 {
 524         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 525
 526         fepriv->wakeup = 1;
 527         wake_up_interruptible(&fepriv->wait_queue);
 528 }
 529
 530 static int dvb_frontend_thread(void *data)
 531 {
 532         struct dvb_frontend *fe = data;
 533         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 534         unsigned long timeout;
 535         fe_status_t s;
 536         enum dvbfe_algo algo;
 537
 538         struct dvb_frontend_parameters *params;
 539
 540         dprintk("%s\n", __func__);
 541
 542         fepriv->check_wrapped = 0;
 543         fepriv->quality = 0;
 544         fepriv->delay = 3*HZ;
 545         fepriv->status = 0;
 546         fepriv->wakeup = 0;
 547         fepriv->reinitialise = 0;
 548
 549         dvb_frontend_init(fe);
 550
 551         set_freezable();
 552         while (1) {
 553                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 554 restart:
 555                 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
 556                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 557                                 || freezing(current),
 558                         fepriv->delay);
 559
 560                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 561                         /* got signal or quitting */
 562                         fepriv->exit = 1;
 563                         break;
 564                 }
 565
 566                 if (try_to_freeze())
 567                         goto restart;
 568
 569                 if (down_interruptible(&fepriv->sem))
 570                         break;
 571
 572                 if (fepriv->reinitialise) {
 573                         dvb_frontend_init(fe);
 574                         if (fepriv->tone != -1) {
 575                                 fe->ops.set_tone(fe, fepriv->tone);
 576                         }
 577                         if (fepriv->voltage != -1) {
 578                                 fe->ops.set_voltage(fe, fepriv->voltage);
 579                         }
 580                         fepriv->reinitialise = 0;
 581                 }
 582
 583                 /* do an iteration of the tuning loop */
 584                 if (fe->ops.get_frontend_algo) {
 585                         algo = fe->ops.get_frontend_algo(fe);
 586                         switch (algo) {
 587                         case DVBFE_ALGO_HW:
 588                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 589                                 params = NULL; /* have we been asked to RETUNE ? */
 590
 591                                 if (fepriv->state & FESTATE_RETUNE) {
 592                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 593                                         params = &fepriv->parameters;
 594                                         fepriv->state = FESTATE_TUNED;
 595                                 }
 596
 597                                 if (fe->ops.tune)
 598                                         fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
 599
 600                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 601                                         dprintk("%s: state changed, adding current state\n", __func__);
 602                                         dvb_frontend_add_event(fe, s);
 603                                         fepriv->status = s;
 604                                 }
 605                                 break;
 606                         case DVBFE_ALGO_SW:
 607                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 608                                 dvb_frontend_swzigzag(fe);
 609                                 break;
 610                         case DVBFE_ALGO_CUSTOM:
 611                                 params = NULL; /* have we been asked to RETUNE ?        */
 612                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 613                                 if (fepriv->state & FESTATE_RETUNE) {
 614                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 615                                         params = &fepriv->parameters;
 616                                         fepriv->state = FESTATE_TUNED;
 617                                 }
 618                                 /* Case where we are going to search for a carrier
 619                                  * User asked us to retune again for some reason, possibly
 620                                  * requesting a search with a new set of parameters
 621                                  */
 622                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 623                                         if (fe->ops.search) {
 624                                                 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
 625                                                 /* We did do a search as was requested, the flags are
 626                                                  * now unset as well and has the flags wrt to search.
 627                                                  */
 628                                         } else {
 629                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 630                                         }
 631                                 }
 632                                 /* Track the carrier if the search was successful */
 633                                 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
 634                                         if (fe->ops.track)
 635                                                 fe->ops.track(fe, &fepriv->parameters);
 636                                 } else {
 637                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 638                                         fepriv->delay = HZ / 2;
 639                                 }
 640                                 fe->ops.read_status(fe, &s);
 641                                 if (s != fepriv->status) {
 642                                         dvb_frontend_add_event(fe, s); /* update event list */
 643                                         fepriv->status = s;
 644                                         if (!(s & FE_HAS_LOCK)) {
 645                                                 fepriv->delay = HZ / 10;
 646                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 647                                         } else {
 648                                                 fepriv->delay = 60 * HZ;
 649                                         }
 650                                 }
 651                                 break;
 652                         default:
 653                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 654                                 break;
 655                         }
 656                 } else {
 657                         dvb_frontend_swzigzag(fe);
 658                 }
 659         }
 660
 661         if (dvb_powerdown_on_sleep) {
 662                 if (fe->ops.set_voltage)
 663                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 664                 if (fe->ops.tuner_ops.sleep) {
 665                         if (fe->ops.i2c_gate_ctrl)
 666                                 fe->ops.i2c_gate_ctrl(fe, 1);
 667                         fe->ops.tuner_ops.sleep(fe);
 668                         if (fe->ops.i2c_gate_ctrl)
 669                                 fe->ops.i2c_gate_ctrl(fe, 0);
 670                 }
 671                 if (fe->ops.sleep)
 672                         fe->ops.sleep(fe);
 673         }
 674
 675         fepriv->thread = NULL;
 676         fepriv->exit = 0;
 677         mb();
 678
 679         dvb_frontend_wakeup(fe);
 680         return 0;
 681 }
 682
 683 static void dvb_frontend_stop(struct dvb_frontend *fe)
 684 {
 685         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 686
 687         dprintk ("%s\n", __func__);
 688
 689         fepriv->exit = 1;
 690         mb();
 691
 692         if (!fepriv->thread)
 693                 return;
 694
 695         kthread_stop(fepriv->thread);
 696
 697         init_MUTEX (&fepriv->sem);
 698         fepriv->state = FESTATE_IDLE;
 699
 700         /* paranoia check in case a signal arrived */
 701         if (fepriv->thread)
 702                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 703                                 fepriv->thread);
 704 }
 705
 706 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 707 {
 708         return ((curtime.tv_usec < lasttime.tv_usec) ?
 709                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 710                 curtime.tv_usec - lasttime.tv_usec);
 711 }
 712 EXPORT_SYMBOL(timeval_usec_diff);
 713
 714 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 715 {
 716         curtime->tv_usec += add_usec;
 717         if (curtime->tv_usec >= 1000000) {
 718                 curtime->tv_usec -= 1000000;
 719                 curtime->tv_sec++;
 720         }
 721 }
 722
 723 /*
 724  * Sleep until gettimeofday() > waketime + add_usec
 725  * This needs to be as precise as possible, but as the delay is
 726  * usually between 2ms and 32ms, it is done using a scheduled msleep
 727  * followed by usleep (normally a busy-wait loop) for the remainder
 728  */
 729 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 730 {
 731         struct timeval lasttime;
 732         s32 delta, newdelta;
 733
 734         timeval_usec_add(waketime, add_usec);
 735
 736         do_gettimeofday(&lasttime);
 737         delta = timeval_usec_diff(lasttime, *waketime);
 738         if (delta > 2500) {
 739                 msleep((delta - 1500) / 1000);
 740                 do_gettimeofday(&lasttime);
 741                 newdelta = timeval_usec_diff(lasttime, *waketime);
 742                 delta = (newdelta > delta) ? 0 : newdelta;
 743         }
 744         if (delta > 0)
 745                 udelay(delta);
 746 }
 747 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 748
 749 static int dvb_frontend_start(struct dvb_frontend *fe)
 750 {
 751         int ret;
 752         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 753         struct task_struct *fe_thread;
 754
 755         dprintk ("%s\n", __func__);
 756
 757         if (fepriv->thread) {
 758                 if (!fepriv->exit)
 759                         return 0;
 760                 else
 761                         dvb_frontend_stop (fe);
 762         }
 763
 764         if (signal_pending(current))
 765                 return -EINTR;
 766         if (down_interruptible (&fepriv->sem))
 767                 return -EINTR;
 768
 769         fepriv->state = FESTATE_IDLE;
 770         fepriv->exit = 0;
 771         fepriv->thread = NULL;
 772         mb();
 773
 774         fe_thread = kthread_run(dvb_frontend_thread, fe,
 775                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 776         if (IS_ERR(fe_thread)) {
 777                 ret = PTR_ERR(fe_thread);
 778                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 779                 up(&fepriv->sem);
 780                 return ret;
 781         }
 782         fepriv->thread = fe_thread;
 783         return 0;
 784 }
 785
 786 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
 787                                         u32 *freq_min, u32 *freq_max)
 788 {
 789         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 790
 791         if (fe->ops.info.frequency_max == 0)
 792                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 793         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 794                 *freq_max = fe->ops.info.frequency_max;
 795         else
 796                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 797
 798         if (*freq_min == 0 || *freq_max == 0)
 799                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 800                        fe->dvb->num,fe->id);
 801 }
 802
 803 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 804                                 struct dvb_frontend_parameters *parms)
 805 {
 806         u32 freq_min;
 807         u32 freq_max;
 808
 809         /* range check: frequency */
 810         dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
 811         if ((freq_min && parms->frequency < freq_min) ||
 812             (freq_max && parms->frequency > freq_max)) {
 813                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 814                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 815                 return -EINVAL;
 816         }
 817
 818         /* range check: symbol rate */
 819         if (fe->ops.info.type == FE_QPSK) {
 820                 if ((fe->ops.info.symbol_rate_min &&
 821                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 822                     (fe->ops.info.symbol_rate_max &&
 823                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 824                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 825                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 826                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 827                         return -EINVAL;
 828                 }
 829
 830         } else if (fe->ops.info.type == FE_QAM) {
 831                 if ((fe->ops.info.symbol_rate_min &&
 832                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 833                     (fe->ops.info.symbol_rate_max &&
 834                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 835                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 836                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 837                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 838                         return -EINVAL;
 839                 }
 840         }
 841
 842         /* check for supported modulation */
 843         if (fe->ops.info.type == FE_QAM &&
 844             (parms->u.qam.modulation > QAM_AUTO ||
 845              !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
 846                 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
 847                        fe->dvb->num, fe->id, parms->u.qam.modulation);
 848                         return -EINVAL;
 849         }
 850
 851         return 0;
 852 }
 853
 854 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 855 {
 856         int i;
 857
 858         memset(&(fe->dtv_property_cache), 0,
 859                         sizeof(struct dtv_frontend_properties));
 860
 861         fe->dtv_property_cache.state = DTV_CLEAR;
 862         fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
 863         fe->dtv_property_cache.inversion = INVERSION_AUTO;
 864         fe->dtv_property_cache.fec_inner = FEC_AUTO;
 865         fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO;
 866         fe->dtv_property_cache.bandwidth_hz = BANDWIDTH_AUTO;
 867         fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO;
 868         fe->dtv_property_cache.hierarchy = HIERARCHY_AUTO;
 869         fe->dtv_property_cache.symbol_rate = QAM_AUTO;
 870         fe->dtv_property_cache.code_rate_HP = FEC_AUTO;
 871         fe->dtv_property_cache.code_rate_LP = FEC_AUTO;
 872
 873         fe->dtv_property_cache.isdbt_partial_reception = -1;
 874         fe->dtv_property_cache.isdbt_sb_mode = -1;
 875         fe->dtv_property_cache.isdbt_sb_subchannel = -1;
 876         fe->dtv_property_cache.isdbt_sb_segment_idx = -1;
 877         fe->dtv_property_cache.isdbt_sb_segment_count = -1;
 878         fe->dtv_property_cache.isdbt_layer_enabled = 0x7;
 879         for (i = 0; i < 3; i++) {
 880                 fe->dtv_property_cache.layer[i].fec = FEC_AUTO;
 881                 fe->dtv_property_cache.layer[i].modulation = QAM_AUTO;
 882                 fe->dtv_property_cache.layer[i].interleaving = -1;
 883                 fe->dtv_property_cache.layer[i].segment_count = -1;
 884         }
 885
 886         return 0;
 887 }
 888
 889 #define _DTV_CMD(n, s, b) \
 890 [n] = { \
 891         .name = #n, \
 892         .cmd  = n, \
 893         .set  = s,\
 894         .buffer = b \
 895 }
 896
 897 static struct dtv_cmds_h dtv_cmds[] = {
 898         _DTV_CMD(DTV_TUNE, 1, 0),
 899         _DTV_CMD(DTV_CLEAR, 1, 0),
 900
 901         /* Set */
 902         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 903         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 904         _DTV_CMD(DTV_MODULATION, 1, 0),
 905         _DTV_CMD(DTV_INVERSION, 1, 0),
 906         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 907         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 908         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 909         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 910         _DTV_CMD(DTV_TONE, 1, 0),
 911         _DTV_CMD(DTV_PILOT, 1, 0),
 912         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 913         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 914         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 915         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 916         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 917         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 918         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
 919
 920         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
 921         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
 922         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
 923         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
 924         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
 925         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
 926         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
 927         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
 928         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
 929         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
 930         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
 931         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
 932         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
 933         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
 934         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
 935         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
 936         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
 937         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
 938
 939         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
 940         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
 941         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
 942         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
 943         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
 944         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
 945         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
 946         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
 947         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
 948         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
 949         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
 950         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
 951         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
 952         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
 953         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
 954         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
 955         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
 956         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
 957
 958         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
 959
 960         /* Get */
 961         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
 962         _DTV_CMD(DTV_API_VERSION, 0, 0),
 963         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
 964         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
 965         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
 966         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
 967         _DTV_CMD(DTV_HIERARCHY, 0, 0),
 968 };
 969
 970 static void dtv_property_dump(struct dtv_property *tvp)
 971 {
 972         int i;
 973
 974         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 975                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 976                         __func__, tvp->cmd);
 977                 return;
 978         }
 979
 980         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 981                 ,__func__
 982                 ,tvp->cmd
 983                 ,dtv_cmds[ tvp->cmd ].name);
 984
 985         if(dtv_cmds[ tvp->cmd ].buffer) {
 986
 987                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 988                         ,__func__
 989                         ,tvp->u.buffer.len);
 990
 991                 for(i = 0; i < tvp->u.buffer.len; i++)
 992                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
 993                                 ,__func__
 994                                 ,i
 995                                 ,tvp->u.buffer.data[i]);
 996
 997         } else
 998                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
 999 }
1000
1001 static int is_legacy_delivery_system(fe_delivery_system_t s)
1002 {
1003         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1004            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1005            (s == SYS_ATSC))
1006                 return 1;
1007
1008         return 0;
1009 }
1010
1011 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1012  * drivers can use a single set_frontend tuning function, regardless of whether
1013  * it's being used for the legacy or new API, reducing code and complexity.
1014  */
1015 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1016                                     struct dvb_frontend_parameters *p)
1017 {
1018         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1019
1020         c->frequency = p->frequency;
1021         c->inversion = p->inversion;
1022
1023         switch (fe->ops.info.type) {
1024         case FE_QPSK:
1025                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1026                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1027                 c->symbol_rate = p->u.qpsk.symbol_rate;
1028                 c->fec_inner = p->u.qpsk.fec_inner;
1029                 c->delivery_system = SYS_DVBS;
1030                 break;
1031         case FE_QAM:
1032                 c->symbol_rate = p->u.qam.symbol_rate;
1033                 c->fec_inner = p->u.qam.fec_inner;
1034                 c->modulation = p->u.qam.modulation;
1035                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1036                 break;
1037         case FE_OFDM:
1038                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1039                         c->bandwidth_hz = 6000000;
1040                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1041                         c->bandwidth_hz = 7000000;
1042                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1043                         c->bandwidth_hz = 8000000;
1044                 else
1045                         /* Including BANDWIDTH_AUTO */
1046                         c->bandwidth_hz = 0;
1047                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1048                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1049                 c->modulation = p->u.ofdm.constellation;
1050                 c->transmission_mode = p->u.ofdm.transmission_mode;
1051                 c->guard_interval = p->u.ofdm.guard_interval;
1052                 c->hierarchy = p->u.ofdm.hierarchy_information;
1053                 c->delivery_system = SYS_DVBT;
1054                 break;
1055         case FE_ATSC:
1056                 c->modulation = p->u.vsb.modulation;
1057                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1058                         c->delivery_system = SYS_ATSC;
1059                 else
1060                         c->delivery_system = SYS_DVBC_ANNEX_B;
1061                 break;
1062         }
1063 }
1064
1065 /* Ensure the cached values are set correctly in the frontend
1066  * legacy tuning structures, for the advanced tuning API.
1067  */
1068 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1069 {
1070         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1071         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1072         struct dvb_frontend_parameters *p = &fepriv->parameters;
1073
1074         p->frequency = c->frequency;
1075         p->inversion = c->inversion;
1076
1077         switch (fe->ops.info.type) {
1078         case FE_QPSK:
1079                 dprintk("%s() Preparing QPSK req\n", __func__);
1080                 p->u.qpsk.symbol_rate = c->symbol_rate;
1081                 p->u.qpsk.fec_inner = c->fec_inner;
1082                 c->delivery_system = SYS_DVBS;
1083                 break;
1084         case FE_QAM:
1085                 dprintk("%s() Preparing QAM req\n", __func__);
1086                 p->u.qam.symbol_rate = c->symbol_rate;
1087                 p->u.qam.fec_inner = c->fec_inner;
1088                 p->u.qam.modulation = c->modulation;
1089                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1090                 break;
1091         case FE_OFDM:
1092                 dprintk("%s() Preparing OFDM req\n", __func__);
1093                 if (c->bandwidth_hz == 6000000)
1094                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1095                 else if (c->bandwidth_hz == 7000000)
1096                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1097                 else if (c->bandwidth_hz == 8000000)
1098                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1099                 else
1100                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1101                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1102                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1103                 p->u.ofdm.constellation = c->modulation;
1104                 p->u.ofdm.transmission_mode = c->transmission_mode;
1105                 p->u.ofdm.guard_interval = c->guard_interval;
1106                 p->u.ofdm.hierarchy_information = c->hierarchy;
1107                 c->delivery_system = SYS_DVBT;
1108                 break;
1109         case FE_ATSC:
1110                 dprintk("%s() Preparing VSB req\n", __func__);
1111                 p->u.vsb.modulation = c->modulation;
1112                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1113                         c->delivery_system = SYS_ATSC;
1114                 else
1115                         c->delivery_system = SYS_DVBC_ANNEX_B;
1116                 break;
1117         }
1118 }
1119
1120 /* Ensure the cached values are set correctly in the frontend
1121  * legacy tuning structures, for the legacy tuning API.
1122  */
1123 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1124 {
1125         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1126         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1127         struct dvb_frontend_parameters *p = &fepriv->parameters;
1128
1129         p->frequency = c->frequency;
1130         p->inversion = c->inversion;
1131
1132         switch(c->modulation) {
1133         case PSK_8:
1134         case APSK_16:
1135         case APSK_32:
1136         case QPSK:
1137                 p->u.qpsk.symbol_rate = c->symbol_rate;
1138                 p->u.qpsk.fec_inner = c->fec_inner;
1139                 break;
1140         default:
1141                 break;
1142         }
1143
1144         if(c->delivery_system == SYS_ISDBT) {
1145                 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1146                 p->frequency = c->frequency;
1147                 p->inversion = c->inversion;
1148                 p->u.ofdm.constellation = QAM_AUTO;
1149                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1150                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1151                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1152                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1153                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1154                 if (c->bandwidth_hz == 8000000)
1155                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1156                 else if (c->bandwidth_hz == 7000000)
1157                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1158                 else if (c->bandwidth_hz == 6000000)
1159                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1160                 else
1161                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1162         }
1163 }
1164
1165 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1166 {
1167         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1168
1169         /* For legacy delivery systems we don't need the delivery_system to
1170          * be specified, but we populate the older structures from the cache
1171          * so we can call set_frontend on older drivers.
1172          */
1173         if(is_legacy_delivery_system(c->delivery_system)) {
1174
1175                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1176                 dtv_property_legacy_params_sync(fe);
1177
1178         } else {
1179                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1180
1181                 /* For advanced delivery systems / modulation types ...
1182                  * we seed the lecacy dvb_frontend_parameters structure
1183                  * so that the sanity checking code later in the IOCTL processing
1184                  * can validate our basic frequency ranges, symbolrates, modulation
1185                  * etc.
1186                  */
1187                 dtv_property_adv_params_sync(fe);
1188         }
1189 }
1190
1191 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1192                         unsigned int cmd, void *parg);
1193 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1194                         unsigned int cmd, void *parg);
1195
1196 static int dtv_property_process_get(struct dvb_frontend *fe,
1197                                     struct dtv_property *tvp,
1198                                     struct inode *inode, struct file *file)
1199 {
1200         int r = 0;
1201
1202         /* Allow the frontend to validate incoming properties */
1203         if (fe->ops.get_property)
1204                 r = fe->ops.get_property(fe, tvp);
1205
1206         if (r < 0)
1207                 return r;
1208
1209         switch(tvp->cmd) {
1210         case DTV_FREQUENCY:
1211                 tvp->u.data = fe->dtv_property_cache.frequency;
1212                 break;
1213         case DTV_MODULATION:
1214                 tvp->u.data = fe->dtv_property_cache.modulation;
1215                 break;
1216         case DTV_BANDWIDTH_HZ:
1217                 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1218                 break;
1219         case DTV_INVERSION:
1220                 tvp->u.data = fe->dtv_property_cache.inversion;
1221                 break;
1222         case DTV_SYMBOL_RATE:
1223                 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1224                 break;
1225         case DTV_INNER_FEC:
1226                 tvp->u.data = fe->dtv_property_cache.fec_inner;
1227                 break;
1228         case DTV_PILOT:
1229                 tvp->u.data = fe->dtv_property_cache.pilot;
1230                 break;
1231         case DTV_ROLLOFF:
1232                 tvp->u.data = fe->dtv_property_cache.rolloff;
1233                 break;
1234         case DTV_DELIVERY_SYSTEM:
1235                 tvp->u.data = fe->dtv_property_cache.delivery_system;
1236                 break;
1237         case DTV_VOLTAGE:
1238                 tvp->u.data = fe->dtv_property_cache.voltage;
1239                 break;
1240         case DTV_TONE:
1241                 tvp->u.data = fe->dtv_property_cache.sectone;
1242                 break;
1243         case DTV_API_VERSION:
1244                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1245                 break;
1246         case DTV_CODE_RATE_HP:
1247                 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1248                 break;
1249         case DTV_CODE_RATE_LP:
1250                 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1251                 break;
1252         case DTV_GUARD_INTERVAL:
1253                 tvp->u.data = fe->dtv_property_cache.guard_interval;
1254                 break;
1255         case DTV_TRANSMISSION_MODE:
1256                 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1257                 break;
1258         case DTV_HIERARCHY:
1259                 tvp->u.data = fe->dtv_property_cache.hierarchy;
1260                 break;
1261
1262         /* ISDB-T Support here */
1263         case DTV_ISDBT_PARTIAL_RECEPTION:
1264                 tvp->u.data = fe->dtv_property_cache.isdbt_partial_reception;
1265                 break;
1266         case DTV_ISDBT_SOUND_BROADCASTING:
1267                 tvp->u.data = fe->dtv_property_cache.isdbt_sb_mode;
1268                 break;
1269         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1270                 tvp->u.data = fe->dtv_property_cache.isdbt_sb_subchannel;
1271                 break;
1272         case DTV_ISDBT_SB_SEGMENT_IDX:
1273                 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_idx;
1274                 break;
1275         case DTV_ISDBT_SB_SEGMENT_COUNT:
1276                 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_count;
1277                 break;
1278         case DTV_ISDBT_LAYER_ENABLED:
1279                 tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled;
1280                 break;
1281         case DTV_ISDBT_LAYERA_FEC:
1282                 tvp->u.data = fe->dtv_property_cache.layer[0].fec;
1283                 break;
1284         case DTV_ISDBT_LAYERA_MODULATION:
1285                 tvp->u.data = fe->dtv_property_cache.layer[0].modulation;
1286                 break;
1287         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1288                 tvp->u.data = fe->dtv_property_cache.layer[0].segment_count;
1289                 break;
1290         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1291                 tvp->u.data = fe->dtv_property_cache.layer[0].interleaving;
1292                 break;
1293         case DTV_ISDBT_LAYERB_FEC:
1294                 tvp->u.data = fe->dtv_property_cache.layer[1].fec;
1295                 break;
1296         case DTV_ISDBT_LAYERB_MODULATION:
1297                 tvp->u.data = fe->dtv_property_cache.layer[1].modulation;
1298                 break;
1299         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1300                 tvp->u.data = fe->dtv_property_cache.layer[1].segment_count;
1301                 break;
1302         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1303                 tvp->u.data = fe->dtv_property_cache.layer[1].interleaving;
1304                 break;
1305         case DTV_ISDBT_LAYERC_FEC:
1306                 tvp->u.data = fe->dtv_property_cache.layer[2].fec;
1307                 break;
1308         case DTV_ISDBT_LAYERC_MODULATION:
1309                 tvp->u.data = fe->dtv_property_cache.layer[2].modulation;
1310                 break;
1311         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1312                 tvp->u.data = fe->dtv_property_cache.layer[2].segment_count;
1313                 break;
1314         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1315                 tvp->u.data = fe->dtv_property_cache.layer[2].interleaving;
1316                 break;
1317         case DTV_ISDBS_TS_ID:
1318                 tvp->u.data = fe->dtv_property_cache.isdbs_ts_id;
1319                 break;
1320         default:
1321                 r = -1;
1322         }
1323
1324         dtv_property_dump(tvp);
1325
1326         return r;
1327 }
1328
1329 static int dtv_property_process_set(struct dvb_frontend *fe,
1330                                     struct dtv_property *tvp,
1331                                     struct inode *inode,
1332                                     struct file *file)
1333 {
1334         int r = 0;
1335         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1336         dtv_property_dump(tvp);
1337
1338         /* Allow the frontend to validate incoming properties */
1339         if (fe->ops.set_property)
1340                 r = fe->ops.set_property(fe, tvp);
1341
1342         if (r < 0)
1343                 return r;
1344
1345         switch(tvp->cmd) {
1346         case DTV_CLEAR:
1347                 /* Reset a cache of data specific to the frontend here. This does
1348                  * not effect hardware.
1349                  */
1350                 dvb_frontend_clear_cache(fe);
1351                 dprintk("%s() Flushing property cache\n", __func__);
1352                 break;
1353         case DTV_TUNE:
1354                 /* interpret the cache of data, build either a traditional frontend
1355                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1356                  * ioctl.
1357                  */
1358                 fe->dtv_property_cache.state = tvp->cmd;
1359                 dprintk("%s() Finalised property cache\n", __func__);
1360                 dtv_property_cache_submit(fe);
1361
1362                 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1363                         &fepriv->parameters);
1364                 break;
1365         case DTV_FREQUENCY:
1366                 fe->dtv_property_cache.frequency = tvp->u.data;
1367                 break;
1368         case DTV_MODULATION:
1369                 fe->dtv_property_cache.modulation = tvp->u.data;
1370                 break;
1371         case DTV_BANDWIDTH_HZ:
1372                 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1373                 break;
1374         case DTV_INVERSION:
1375                 fe->dtv_property_cache.inversion = tvp->u.data;
1376                 break;
1377         case DTV_SYMBOL_RATE:
1378                 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1379                 break;
1380         case DTV_INNER_FEC:
1381                 fe->dtv_property_cache.fec_inner = tvp->u.data;
1382                 break;
1383         case DTV_PILOT:
1384                 fe->dtv_property_cache.pilot = tvp->u.data;
1385                 break;
1386         case DTV_ROLLOFF:
1387                 fe->dtv_property_cache.rolloff = tvp->u.data;
1388                 break;
1389         case DTV_DELIVERY_SYSTEM:
1390                 fe->dtv_property_cache.delivery_system = tvp->u.data;
1391                 break;
1392         case DTV_VOLTAGE:
1393                 fe->dtv_property_cache.voltage = tvp->u.data;
1394                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1395                         (void *)fe->dtv_property_cache.voltage);
1396                 break;
1397         case DTV_TONE:
1398                 fe->dtv_property_cache.sectone = tvp->u.data;
1399                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1400                         (void *)fe->dtv_property_cache.sectone);
1401                 break;
1402         case DTV_CODE_RATE_HP:
1403                 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1404                 break;
1405         case DTV_CODE_RATE_LP:
1406                 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1407                 break;
1408         case DTV_GUARD_INTERVAL:
1409                 fe->dtv_property_cache.guard_interval = tvp->u.data;
1410                 break;
1411         case DTV_TRANSMISSION_MODE:
1412                 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1413                 break;
1414         case DTV_HIERARCHY:
1415                 fe->dtv_property_cache.hierarchy = tvp->u.data;
1416                 break;
1417
1418         /* ISDB-T Support here */
1419         case DTV_ISDBT_PARTIAL_RECEPTION:
1420                 fe->dtv_property_cache.isdbt_partial_reception = tvp->u.data;
1421                 break;
1422         case DTV_ISDBT_SOUND_BROADCASTING:
1423                 fe->dtv_property_cache.isdbt_sb_mode = tvp->u.data;
1424                 break;
1425         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1426                 fe->dtv_property_cache.isdbt_sb_subchannel = tvp->u.data;
1427                 break;
1428         case DTV_ISDBT_SB_SEGMENT_IDX:
1429                 fe->dtv_property_cache.isdbt_sb_segment_idx = tvp->u.data;
1430                 break;
1431         case DTV_ISDBT_SB_SEGMENT_COUNT:
1432                 fe->dtv_property_cache.isdbt_sb_segment_count = tvp->u.data;
1433                 break;
1434         case DTV_ISDBT_LAYER_ENABLED:
1435                 fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data;
1436                 break;
1437         case DTV_ISDBT_LAYERA_FEC:
1438                 fe->dtv_property_cache.layer[0].fec = tvp->u.data;
1439                 break;
1440         case DTV_ISDBT_LAYERA_MODULATION:
1441                 fe->dtv_property_cache.layer[0].modulation = tvp->u.data;
1442                 break;
1443         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1444                 fe->dtv_property_cache.layer[0].segment_count = tvp->u.data;
1445                 break;
1446         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1447                 fe->dtv_property_cache.layer[0].interleaving = tvp->u.data;
1448                 break;
1449         case DTV_ISDBT_LAYERB_FEC:
1450                 fe->dtv_property_cache.layer[1].fec = tvp->u.data;
1451                 break;
1452         case DTV_ISDBT_LAYERB_MODULATION:
1453                 fe->dtv_property_cache.layer[1].modulation = tvp->u.data;
1454                 break;
1455         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1456                 fe->dtv_property_cache.layer[1].segment_count = tvp->u.data;
1457                 break;
1458         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1459                 fe->dtv_property_cache.layer[1].interleaving = tvp->u.data;
1460                 break;
1461         case DTV_ISDBT_LAYERC_FEC:
1462                 fe->dtv_property_cache.layer[2].fec = tvp->u.data;
1463                 break;
1464         case DTV_ISDBT_LAYERC_MODULATION:
1465                 fe->dtv_property_cache.layer[2].modulation = tvp->u.data;
1466                 break;
1467         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1468                 fe->dtv_property_cache.layer[2].segment_count = tvp->u.data;
1469                 break;
1470         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1471                 fe->dtv_property_cache.layer[2].interleaving = tvp->u.data;
1472                 break;
1473         case DTV_ISDBS_TS_ID:
1474                 fe->dtv_property_cache.isdbs_ts_id = tvp->u.data;
1475                 break;
1476         default:
1477                 r = -1;
1478         }
1479
1480         return r;
1481 }
1482
1483 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1484                         unsigned int cmd, void *parg)
1485 {
1486         struct dvb_device *dvbdev = file->private_data;
1487         struct dvb_frontend *fe = dvbdev->priv;
1488         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1489         int err = -EOPNOTSUPP;
1490
1491         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1492
1493         if (fepriv->exit)
1494                 return -ENODEV;
1495
1496         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1497             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1498              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1499                 return -EPERM;
1500
1501         if (down_interruptible (&fepriv->sem))
1502                 return -ERESTARTSYS;
1503
1504         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1505                 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1506         else {
1507                 fe->dtv_property_cache.state = DTV_UNDEFINED;
1508                 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1509         }
1510
1511         up(&fepriv->sem);
1512         return err;
1513 }
1514
1515 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1516                         unsigned int cmd, void *parg)
1517 {
1518         struct dvb_device *dvbdev = file->private_data;
1519         struct dvb_frontend *fe = dvbdev->priv;
1520         int err = 0;
1521
1522         struct dtv_properties *tvps = NULL;
1523         struct dtv_property *tvp = NULL;
1524         int i;
1525
1526         dprintk("%s\n", __func__);
1527
1528         if(cmd == FE_SET_PROPERTY) {
1529                 tvps = (struct dtv_properties __user *)parg;
1530
1531                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1532                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1533
1534                 /* Put an arbitrary limit on the number of messages that can
1535                  * be sent at once */
1536                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1537                         return -EINVAL;
1538
1539                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1540                 if (!tvp) {
1541                         err = -ENOMEM;
1542                         goto out;
1543                 }
1544
1545                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1546                         err = -EFAULT;
1547                         goto out;
1548                 }
1549
1550                 for (i = 0; i < tvps->num; i++) {
1551                         (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1552                         err |= (tvp + i)->result;
1553                 }
1554
1555                 if(fe->dtv_property_cache.state == DTV_TUNE)
1556                         dprintk("%s() Property cache is full, tuning\n", __func__);
1557
1558         } else
1559         if(cmd == FE_GET_PROPERTY) {
1560
1561                 tvps = (struct dtv_properties __user *)parg;
1562
1563                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1564                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1565
1566                 /* Put an arbitrary limit on the number of messages that can
1567                  * be sent at once */
1568                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1569                         return -EINVAL;
1570
1571                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1572                 if (!tvp) {
1573                         err = -ENOMEM;
1574                         goto out;
1575                 }
1576
1577                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1578                         err = -EFAULT;
1579                         goto out;
1580                 }
1581
1582                 for (i = 0; i < tvps->num; i++) {
1583                         (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1584                         err |= (tvp + i)->result;
1585                 }
1586
1587                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1588                         err = -EFAULT;
1589                         goto out;
1590                 }
1591
1592         } else
1593                 err = -EOPNOTSUPP;
1594
1595 out:
1596         kfree(tvp);
1597         return err;
1598 }
1599
1600 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1601                         unsigned int cmd, void *parg)
1602 {
1603         struct dvb_device *dvbdev = file->private_data;
1604         struct dvb_frontend *fe = dvbdev->priv;
1605         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1606         int cb_err, err = -EOPNOTSUPP;
1607
1608         if (fe->dvb->fe_ioctl_override) {
1609                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1610                                                     DVB_FE_IOCTL_PRE);
1611                 if (cb_err < 0)
1612                         return cb_err;
1613                 if (cb_err > 0)
1614                         return 0;
1615                 /* fe_ioctl_override returning 0 allows
1616                  * dvb-core to continue handling the ioctl */
1617         }
1618
1619         switch (cmd) {
1620         case FE_GET_INFO: {
1621                 struct dvb_frontend_info* info = parg;
1622                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1623                 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1624
1625                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1626                  * do it, it is done for it. */
1627                 info->caps |= FE_CAN_INVERSION_AUTO;
1628                 err = 0;
1629                 break;
1630         }
1631
1632         case FE_READ_STATUS: {
1633                 fe_status_t* status = parg;
1634
1635                 /* if retune was requested but hasn't occured yet, prevent
1636                  * that user get signal state from previous tuning */
1637                 if (fepriv->state == FESTATE_RETUNE ||
1638                     fepriv->state == FESTATE_ERROR) {
1639                         err=0;
1640                         *status = 0;
1641                         break;
1642                 }
1643
1644                 if (fe->ops.read_status)
1645                         err = fe->ops.read_status(fe, status);
1646                 break;
1647         }
1648         case FE_READ_BER:
1649                 if (fe->ops.read_ber)
1650                         err = fe->ops.read_ber(fe, (__u32*) parg);
1651                 break;
1652
1653         case FE_READ_SIGNAL_STRENGTH:
1654                 if (fe->ops.read_signal_strength)
1655                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1656                 break;
1657
1658         case FE_READ_SNR:
1659                 if (fe->ops.read_snr)
1660                         err = fe->ops.read_snr(fe, (__u16*) parg);
1661                 break;
1662
1663         case FE_READ_UNCORRECTED_BLOCKS:
1664                 if (fe->ops.read_ucblocks)
1665                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1666                 break;
1667
1668
1669         case FE_DISEQC_RESET_OVERLOAD:
1670                 if (fe->ops.diseqc_reset_overload) {
1671                         err = fe->ops.diseqc_reset_overload(fe);
1672                         fepriv->state = FESTATE_DISEQC;
1673                         fepriv->status = 0;
1674                 }
1675                 break;
1676
1677         case FE_DISEQC_SEND_MASTER_CMD:
1678                 if (fe->ops.diseqc_send_master_cmd) {
1679                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1680                         fepriv->state = FESTATE_DISEQC;
1681                         fepriv->status = 0;
1682                 }
1683                 break;
1684
1685         case FE_DISEQC_SEND_BURST:
1686                 if (fe->ops.diseqc_send_burst) {
1687                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1688                         fepriv->state = FESTATE_DISEQC;
1689                         fepriv->status = 0;
1690                 }
1691                 break;
1692
1693         case FE_SET_TONE:
1694                 if (fe->ops.set_tone) {
1695                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1696                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1697                         fepriv->state = FESTATE_DISEQC;
1698                         fepriv->status = 0;
1699                 }
1700                 break;
1701
1702         case FE_SET_VOLTAGE:
1703                 if (fe->ops.set_voltage) {
1704                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1705                         fepriv->voltage = (fe_sec_voltage_t) parg;
1706                         fepriv->state = FESTATE_DISEQC;
1707                         fepriv->status = 0;
1708                 }
1709                 break;
1710
1711         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1712                 if (fe->ops.dishnetwork_send_legacy_command) {
1713                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1714                         fepriv->state = FESTATE_DISEQC;
1715                         fepriv->status = 0;
1716                 } else if (fe->ops.set_voltage) {
1717                         /*
1718                          * NOTE: This is a fallback condition.  Some frontends
1719                          * (stv0299 for instance) take longer than 8msec to
1720                          * respond to a set_voltage command.  Those switches
1721                          * need custom routines to switch properly.  For all
1722                          * other frontends, the following shoule work ok.
1723                          * Dish network legacy switches (as used by Dish500)
1724                          * are controlled by sending 9-bit command words
1725                          * spaced 8msec apart.
1726                          * the actual command word is switch/port dependant
1727                          * so it is up to the userspace application to send
1728                          * the right command.
1729                          * The command must always start with a '0' after
1730                          * initialization, so parg is 8 bits and does not
1731                          * include the initialization or start bit
1732                          */
1733                         unsigned long swcmd = ((unsigned long) parg) << 1;
1734                         struct timeval nexttime;
1735                         struct timeval tv[10];
1736                         int i;
1737                         u8 last = 1;
1738                         if (dvb_frontend_debug)
1739                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1740                         do_gettimeofday(&nexttime);
1741                         if (dvb_frontend_debug)
1742                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1743                         /* before sending a command, initialize by sending
1744                          * a 32ms 18V to the switch
1745                          */
1746                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1747                         dvb_frontend_sleep_until(&nexttime, 32000);
1748
1749                         for (i = 0; i < 9; i++) {
1750                                 if (dvb_frontend_debug)
1751                                         do_gettimeofday(&tv[i + 1]);
1752                                 if ((swcmd & 0x01) != last) {
1753                                         /* set voltage to (last ? 13V : 18V) */
1754                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1755                                         last = (last) ? 0 : 1;
1756                                 }
1757                                 swcmd = swcmd >> 1;
1758                                 if (i != 8)
1759                                         dvb_frontend_sleep_until(&nexttime, 8000);
1760                         }
1761                         if (dvb_frontend_debug) {
1762                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1763                                         __func__, fe->dvb->num);
1764                                 for (i = 1; i < 10; i++)
1765                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1766                         }
1767                         err = 0;
1768                         fepriv->state = FESTATE_DISEQC;
1769                         fepriv->status = 0;
1770                 }
1771                 break;
1772
1773         case FE_DISEQC_RECV_SLAVE_REPLY:
1774                 if (fe->ops.diseqc_recv_slave_reply)
1775                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1776                 break;
1777
1778         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1779                 if (fe->ops.enable_high_lnb_voltage)
1780                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1781                 break;
1782
1783         case FE_SET_FRONTEND: {
1784                 struct dvb_frontend_tune_settings fetunesettings;
1785
1786                 if(fe->dtv_property_cache.state == DTV_TUNE) {
1787                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1788                                 err = -EINVAL;
1789                                 break;
1790                         }
1791                 } else {
1792                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1793                                 err = -EINVAL;
1794                                 break;
1795                         }
1796
1797                         memcpy (&fepriv->parameters, parg,
1798                                 sizeof (struct dvb_frontend_parameters));
1799                         dtv_property_cache_sync(fe, &fepriv->parameters);
1800                 }
1801
1802                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1803                 memcpy(&fetunesettings.parameters, parg,
1804                        sizeof (struct dvb_frontend_parameters));
1805
1806                 /* force auto frequency inversion if requested */
1807                 if (dvb_force_auto_inversion) {
1808                         fepriv->parameters.inversion = INVERSION_AUTO;
1809                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1810                 }
1811                 if (fe->ops.info.type == FE_OFDM) {
1812                         /* without hierarchical coding code_rate_LP is irrelevant,
1813                          * so we tolerate the otherwise invalid FEC_NONE setting */
1814                         if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1815                             fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1816                                 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1817                 }
1818
1819                 /* get frontend-specific tuning settings */
1820                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1821                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1822                         fepriv->max_drift = fetunesettings.max_drift;
1823                         fepriv->step_size = fetunesettings.step_size;
1824                 } else {
1825                         /* default values */
1826                         switch(fe->ops.info.type) {
1827                         case FE_QPSK:
1828                                 fepriv->min_delay = HZ/20;
1829                                 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1830                                 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1831                                 break;
1832
1833                         case FE_QAM:
1834                                 fepriv->min_delay = HZ/20;
1835                                 fepriv->step_size = 0; /* no zigzag */
1836                                 fepriv->max_drift = 0;
1837                                 break;
1838
1839                         case FE_OFDM:
1840                                 fepriv->min_delay = HZ/20;
1841                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1842                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1843                                 break;
1844                         case FE_ATSC:
1845                                 fepriv->min_delay = HZ/20;
1846                                 fepriv->step_size = 0;
1847                                 fepriv->max_drift = 0;
1848                                 break;
1849                         }
1850                 }
1851                 if (dvb_override_tune_delay > 0)
1852                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1853
1854                 fepriv->state = FESTATE_RETUNE;
1855
1856                 /* Request the search algorithm to search */
1857                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1858
1859                 dvb_frontend_wakeup(fe);
1860                 dvb_frontend_add_event(fe, 0);
1861                 fepriv->status = 0;
1862                 err = 0;
1863                 break;
1864         }
1865
1866         case FE_GET_EVENT:
1867                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1868                 break;
1869
1870         case FE_GET_FRONTEND:
1871                 if (fe->ops.get_frontend) {
1872                         memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1873                         err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1874                 }
1875                 break;
1876
1877         case FE_SET_FRONTEND_TUNE_MODE:
1878                 fepriv->tune_mode_flags = (unsigned long) parg;
1879                 err = 0;
1880                 break;
1881         };
1882
1883         if (fe->dvb->fe_ioctl_override) {
1884                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1885                                                     DVB_FE_IOCTL_POST);
1886                 if (cb_err < 0)
1887                         return cb_err;
1888         }
1889
1890         return err;
1891 }
1892
1893
1894 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1895 {
1896         struct dvb_device *dvbdev = file->private_data;
1897         struct dvb_frontend *fe = dvbdev->priv;
1898         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1899
1900         dprintk ("%s\n", __func__);
1901
1902         poll_wait (file, &fepriv->events.wait_queue, wait);
1903
1904         if (fepriv->events.eventw != fepriv->events.eventr)
1905                 return (POLLIN | POLLRDNORM | POLLPRI);
1906
1907         return 0;
1908 }
1909
1910 static int dvb_frontend_open(struct inode *inode, struct file *file)
1911 {
1912         struct dvb_device *dvbdev = file->private_data;
1913         struct dvb_frontend *fe = dvbdev->priv;
1914         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1915         struct dvb_adapter *adapter = fe->dvb;
1916         int ret;
1917
1918         dprintk ("%s\n", __func__);
1919
1920         if (adapter->mfe_shared) {
1921                 mutex_lock (&adapter->mfe_lock);
1922
1923                 if (adapter->mfe_dvbdev == NULL)
1924                         adapter->mfe_dvbdev = dvbdev;
1925
1926                 else if (adapter->mfe_dvbdev != dvbdev) {
1927                         struct dvb_device
1928                                 *mfedev = adapter->mfe_dvbdev;
1929                         struct dvb_frontend
1930                                 *mfe = mfedev->priv;
1931                         struct dvb_frontend_private
1932                                 *mfepriv = mfe->frontend_priv;
1933                         int mferetry = (dvb_mfe_wait_time << 1);
1934
1935                         mutex_unlock (&adapter->mfe_lock);
1936                         while (mferetry-- && (mfedev->users != -1 ||
1937                                         mfepriv->thread != NULL)) {
1938                                 if(msleep_interruptible(500)) {
1939                                         if(signal_pending(current))
1940                                                 return -EINTR;
1941                                 }
1942                         }
1943
1944                         mutex_lock (&adapter->mfe_lock);
1945                         if(adapter->mfe_dvbdev != dvbdev) {
1946                                 mfedev = adapter->mfe_dvbdev;
1947                                 mfe = mfedev->priv;
1948                                 mfepriv = mfe->frontend_priv;
1949                                 if (mfedev->users != -1 ||
1950                                                 mfepriv->thread != NULL) {
1951                                         mutex_unlock (&adapter->mfe_lock);
1952                                         return -EBUSY;
1953                                 }
1954                                 adapter->mfe_dvbdev = dvbdev;
1955                         }
1956                 }
1957         }
1958
1959         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1960                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1961                         goto err0;
1962         }
1963
1964         if ((ret = dvb_generic_open (inode, file)) < 0)
1965                 goto err1;
1966
1967         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1968                 /* normal tune mode when opened R/W */
1969                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1970                 fepriv->tone = -1;
1971                 fepriv->voltage = -1;
1972
1973                 ret = dvb_frontend_start (fe);
1974                 if (ret)
1975                         goto err2;
1976
1977                 /*  empty event queue */
1978                 fepriv->events.eventr = fepriv->events.eventw = 0;
1979         }
1980
1981         if (adapter->mfe_shared)
1982                 mutex_unlock (&adapter->mfe_lock);
1983         return ret;
1984
1985 err2:
1986         dvb_generic_release(inode, file);
1987 err1:
1988         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1989                 fe->ops.ts_bus_ctrl(fe, 0);
1990 err0:
1991         if (adapter->mfe_shared)
1992                 mutex_unlock (&adapter->mfe_lock);
1993         return ret;
1994 }
1995
1996 static int dvb_frontend_release(struct inode *inode, struct file *file)
1997 {
1998         struct dvb_device *dvbdev = file->private_data;
1999         struct dvb_frontend *fe = dvbdev->priv;
2000         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2001         int ret;
2002
2003         dprintk ("%s\n", __func__);
2004
2005         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
2006                 fepriv->release_jiffies = jiffies;
2007
2008         ret = dvb_generic_release (inode, file);
2009
2010         if (dvbdev->users == -1) {
2011                 if (fepriv->exit == 1) {
2012                         fops_put(file->f_op);
2013                         file->f_op = NULL;
2014                         wake_up(&dvbdev->wait_queue);
2015                 }
2016                 if (fe->ops.ts_bus_ctrl)
2017                         fe->ops.ts_bus_ctrl(fe, 0);
2018         }
2019
2020         return ret;
2021 }
2022
2023 static const struct file_operations dvb_frontend_fops = {
2024         .owner          = THIS_MODULE,
2025         .ioctl          = dvb_generic_ioctl,
2026         .poll           = dvb_frontend_poll,
2027         .open           = dvb_frontend_open,
2028         .release        = dvb_frontend_release
2029 };
2030
2031 int dvb_register_frontend(struct dvb_adapter* dvb,
2032                           struct dvb_frontend* fe)
2033 {
2034         struct dvb_frontend_private *fepriv;
2035         static const struct dvb_device dvbdev_template = {
2036                 .users = ~0,
2037                 .writers = 1,
2038                 .readers = (~0)-1,
2039                 .fops = &dvb_frontend_fops,
2040                 .kernel_ioctl = dvb_frontend_ioctl
2041         };
2042
2043         dprintk ("%s\n", __func__);
2044
2045         if (mutex_lock_interruptible(&frontend_mutex))
2046                 return -ERESTARTSYS;
2047
2048         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2049         if (fe->frontend_priv == NULL) {
2050                 mutex_unlock(&frontend_mutex);
2051                 return -ENOMEM;
2052         }
2053         fepriv = fe->frontend_priv;
2054
2055         init_MUTEX (&fepriv->sem);
2056         init_waitqueue_head (&fepriv->wait_queue);
2057         init_waitqueue_head (&fepriv->events.wait_queue);
2058         mutex_init(&fepriv->events.mtx);
2059         fe->dvb = dvb;
2060         fepriv->inversion = INVERSION_OFF;
2061
2062         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2063                 fe->dvb->num,
2064                 fe->id,
2065                 fe->ops.info.name);
2066
2067         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2068                              fe, DVB_DEVICE_FRONTEND);
2069
2070         mutex_unlock(&frontend_mutex);
2071         return 0;
2072 }
2073 EXPORT_SYMBOL(dvb_register_frontend);
2074
2075 int dvb_unregister_frontend(struct dvb_frontend* fe)
2076 {
2077         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2078         dprintk ("%s\n", __func__);
2079
2080         mutex_lock(&frontend_mutex);
2081         dvb_frontend_stop (fe);
2082         mutex_unlock(&frontend_mutex);
2083
2084         if (fepriv->dvbdev->users < -1)
2085                 wait_event(fepriv->dvbdev->wait_queue,
2086                                 fepriv->dvbdev->users==-1);
2087
2088         mutex_lock(&frontend_mutex);
2089         dvb_unregister_device (fepriv->dvbdev);
2090
2091         /* fe is invalid now */
2092         kfree(fepriv);
2093         mutex_unlock(&frontend_mutex);
2094         return 0;
2095 }
2096 EXPORT_SYMBOL(dvb_unregister_frontend);
2097
2098 #ifdef CONFIG_MEDIA_ATTACH
2099 void dvb_frontend_detach(struct dvb_frontend* fe)
2100 {
2101         void *ptr;
2102
2103         if (fe->ops.release_sec) {
2104                 fe->ops.release_sec(fe);
2105                 symbol_put_addr(fe->ops.release_sec);
2106         }
2107         if (fe->ops.tuner_ops.release) {
2108                 fe->ops.tuner_ops.release(fe);
2109                 symbol_put_addr(fe->ops.tuner_ops.release);
2110         }
2111         if (fe->ops.analog_ops.release) {
2112                 fe->ops.analog_ops.release(fe);
2113                 symbol_put_addr(fe->ops.analog_ops.release);
2114         }
2115         ptr = (void*)fe->ops.release;
2116         if (ptr) {
2117                 fe->ops.release(fe);
2118                 symbol_put_addr(ptr);
2119         }
2120 }
2121 #else
2122 void dvb_frontend_detach(struct dvb_frontend* fe)
2123 {
2124         if (fe->ops.release_sec)
2125                 fe->ops.release_sec(fe);
2126         if (fe->ops.tuner_ops.release)
2127                 fe->ops.tuner_ops.release(fe);
2128         if (fe->ops.analog_ops.release)
2129                 fe->ops.analog_ops.release(fe);
2130         if (fe->ops.release)
2131                 fe->ops.release(fe);
2132 }
2133 #endif
2134 EXPORT_SYMBOL(dvb_frontend_detach);