drivers/media/dvb/dvb-core/dvb_frontend.c

   1 /*
   2  * dvb_frontend.c: DVB frontend tuning interface/thread
   3  *
   4  *
   5  * Copyright (C) 1999-2001 Ralph  Metzler
   6  *                         Marcus Metzler
   7  *                         Holger Waechtler
   8  *                                    for convergence integrated media GmbH
   9  *
  10  * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26  */
  27
  28 #include <linux/string.h>
  29 #include <linux/kernel.h>
  30 #include <linux/sched.h>
  31 #include <linux/wait.h>
  32 #include <linux/slab.h>
  33 #include <linux/poll.h>
  34 #include <linux/module.h>
  35 #include <linux/list.h>
  36 #include <linux/freezer.h>
  37 #include <linux/jiffies.h>
  38 #include <linux/kthread.h>
  39 #include <asm/processor.h>
  40
  41 #include "dvb_frontend.h"
  42 #include "dvbdev.h"
  43 #include <linux/dvb/version.h>
  44
  45 static int dvb_frontend_debug;
  46 static int dvb_shutdown_timeout;
  47 static int dvb_force_auto_inversion;
  48 static int dvb_override_tune_delay;
  49 static int dvb_powerdown_on_sleep = 1;
  50 static int dvb_mfe_wait_time = 5;
  51
  52 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  53 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  54 module_param(dvb_shutdown_timeout, int, 0644);
  55 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  56 module_param(dvb_force_auto_inversion, int, 0644);
  57 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  58 module_param(dvb_override_tune_delay, int, 0644);
  59 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  60 module_param(dvb_powerdown_on_sleep, int, 0644);
  61 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  62 module_param(dvb_mfe_wait_time, int, 0644);
  63 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
  64
  65 #define dprintk if (dvb_frontend_debug) printk
  66
  67 #define FESTATE_IDLE 1
  68 #define FESTATE_RETUNE 2
  69 #define FESTATE_TUNING_FAST 4
  70 #define FESTATE_TUNING_SLOW 8
  71 #define FESTATE_TUNED 16
  72 #define FESTATE_ZIGZAG_FAST 32
  73 #define FESTATE_ZIGZAG_SLOW 64
  74 #define FESTATE_DISEQC 128
  75 #define FESTATE_ERROR 256
  76 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  77 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  78 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  79 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  80
  81 #define FE_ALGO_HW              1
  82 /*
  83  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  84  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  85  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  86  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  87  * FESTATE_TUNED. The frontend has successfully locked on.
  88  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  89  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  90  * FESTATE_DISEQC. A DISEQC command has just been issued.
  91  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  92  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  93  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  94  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  95  */
  96
  97 static DEFINE_MUTEX(frontend_mutex);
  98
  99 struct dvb_frontend_private {
 100
 101         /* thread/frontend values */
 102         struct dvb_device *dvbdev;
 103         struct dvb_frontend_parameters parameters;
 104         struct dvb_fe_events events;
 105         struct semaphore sem;
 106         struct list_head list_head;
 107         wait_queue_head_t wait_queue;
 108         struct task_struct *thread;
 109         unsigned long release_jiffies;
 110         unsigned int exit;
 111         unsigned int wakeup;
 112         fe_status_t status;
 113         unsigned long tune_mode_flags;
 114         unsigned int delay;
 115         unsigned int reinitialise;
 116         int tone;
 117         int voltage;
 118
 119         /* swzigzag values */
 120         unsigned int state;
 121         unsigned int bending;
 122         int lnb_drift;
 123         unsigned int inversion;
 124         unsigned int auto_step;
 125         unsigned int auto_sub_step;
 126         unsigned int started_auto_step;
 127         unsigned int min_delay;
 128         unsigned int max_drift;
 129         unsigned int step_size;
 130         int quality;
 131         unsigned int check_wrapped;
 132         enum dvbfe_search algo_status;
 133 };
 134
 135 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 136
 137 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 138 {
 139         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 140         struct dvb_fe_events *events = &fepriv->events;
 141         struct dvb_frontend_event *e;
 142         int wp;
 143
 144         dprintk ("%s\n", __func__);
 145
 146         if (mutex_lock_interruptible (&events->mtx))
 147                 return;
 148
 149         wp = (events->eventw + 1) % MAX_EVENT;
 150
 151         if (wp == events->eventr) {
 152                 events->overflow = 1;
 153                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 154         }
 155
 156         e = &events->events[events->eventw];
 157
 158         memcpy (&e->parameters, &fepriv->parameters,
 159                 sizeof (struct dvb_frontend_parameters));
 160
 161         if (status & FE_HAS_LOCK)
 162                 if (fe->ops.get_frontend)
 163                         fe->ops.get_frontend(fe, &e->parameters);
 164
 165         events->eventw = wp;
 166
 167         mutex_unlock(&events->mtx);
 168
 169         e->status = status;
 170
 171         wake_up_interruptible (&events->wait_queue);
 172 }
 173
 174 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 175                             struct dvb_frontend_event *event, int flags)
 176 {
 177         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 178         struct dvb_fe_events *events = &fepriv->events;
 179
 180         dprintk ("%s\n", __func__);
 181
 182         if (events->overflow) {
 183                 events->overflow = 0;
 184                 return -EOVERFLOW;
 185         }
 186
 187         if (events->eventw == events->eventr) {
 188                 int ret;
 189
 190                 if (flags & O_NONBLOCK)
 191                         return -EWOULDBLOCK;
 192
 193                 up(&fepriv->sem);
 194
 195                 ret = wait_event_interruptible (events->wait_queue,
 196                                                 events->eventw != events->eventr);
 197
 198                 if (down_interruptible (&fepriv->sem))
 199                         return -ERESTARTSYS;
 200
 201                 if (ret < 0)
 202                         return ret;
 203         }
 204
 205         if (mutex_lock_interruptible (&events->mtx))
 206                 return -ERESTARTSYS;
 207
 208         memcpy (event, &events->events[events->eventr],
 209                 sizeof(struct dvb_frontend_event));
 210
 211         events->eventr = (events->eventr + 1) % MAX_EVENT;
 212
 213         mutex_unlock(&events->mtx);
 214
 215         return 0;
 216 }
 217
 218 static void dvb_frontend_init(struct dvb_frontend *fe)
 219 {
 220         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 221                  fe->dvb->num,
 222                  fe->id,
 223                  fe->ops.info.name);
 224
 225         if (fe->ops.init)
 226                 fe->ops.init(fe);
 227         if (fe->ops.tuner_ops.init) {
 228                 if (fe->ops.i2c_gate_ctrl)
 229                         fe->ops.i2c_gate_ctrl(fe, 1);
 230                 fe->ops.tuner_ops.init(fe);
 231                 if (fe->ops.i2c_gate_ctrl)
 232                         fe->ops.i2c_gate_ctrl(fe, 0);
 233         }
 234 }
 235
 236 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 237 {
 238         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 239
 240         fepriv->reinitialise = 1;
 241         dvb_frontend_wakeup(fe);
 242 }
 243 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 244
 245 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 246 {
 247         int q2;
 248
 249         dprintk ("%s\n", __func__);
 250
 251         if (locked)
 252                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 253         else
 254                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 255
 256         q2 = fepriv->quality - 128;
 257         q2 *= q2;
 258
 259         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 260 }
 261
 262 /**
 263  * Performs automatic twiddling of frontend parameters.
 264  *
 265  * @param fe The frontend concerned.
 266  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 267  * @returns Number of complete iterations that have been performed.
 268  */
 269 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 270 {
 271         int autoinversion;
 272         int ready = 0;
 273         int fe_set_err = 0;
 274         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 275         int original_inversion = fepriv->parameters.inversion;
 276         u32 original_frequency = fepriv->parameters.frequency;
 277
 278         /* are we using autoinversion? */
 279         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 280                          (fepriv->parameters.inversion == INVERSION_AUTO));
 281
 282         /* setup parameters correctly */
 283         while(!ready) {
 284                 /* calculate the lnb_drift */
 285                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 286
 287                 /* wrap the auto_step if we've exceeded the maximum drift */
 288                 if (fepriv->lnb_drift > fepriv->max_drift) {
 289                         fepriv->auto_step = 0;
 290                         fepriv->auto_sub_step = 0;
 291                         fepriv->lnb_drift = 0;
 292                 }
 293
 294                 /* perform inversion and +/- zigzag */
 295                 switch(fepriv->auto_sub_step) {
 296                 case 0:
 297                         /* try with the current inversion and current drift setting */
 298                         ready = 1;
 299                         break;
 300
 301                 case 1:
 302                         if (!autoinversion) break;
 303
 304                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 305                         ready = 1;
 306                         break;
 307
 308                 case 2:
 309                         if (fepriv->lnb_drift == 0) break;
 310
 311                         fepriv->lnb_drift = -fepriv->lnb_drift;
 312                         ready = 1;
 313                         break;
 314
 315                 case 3:
 316                         if (fepriv->lnb_drift == 0) break;
 317                         if (!autoinversion) break;
 318
 319                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 320                         fepriv->lnb_drift = -fepriv->lnb_drift;
 321                         ready = 1;
 322                         break;
 323
 324                 default:
 325                         fepriv->auto_step++;
 326                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 327                         break;
 328                 }
 329
 330                 if (!ready) fepriv->auto_sub_step++;
 331         }
 332
 333         /* if this attempt would hit where we started, indicate a complete
 334          * iteration has occurred */
 335         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 336             (fepriv->auto_sub_step == 0) && check_wrapped) {
 337                 return 1;
 338         }
 339
 340         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 341                 "auto_sub_step:%i started_auto_step:%i\n",
 342                 __func__, fepriv->lnb_drift, fepriv->inversion,
 343                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 344
 345         /* set the frontend itself */
 346         fepriv->parameters.frequency += fepriv->lnb_drift;
 347         if (autoinversion)
 348                 fepriv->parameters.inversion = fepriv->inversion;
 349         if (fe->ops.set_frontend)
 350                 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
 351         if (fe_set_err < 0) {
 352                 fepriv->state = FESTATE_ERROR;
 353                 return fe_set_err;
 354         }
 355
 356         fepriv->parameters.frequency = original_frequency;
 357         fepriv->parameters.inversion = original_inversion;
 358
 359         fepriv->auto_sub_step++;
 360         return 0;
 361 }
 362
 363 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 364 {
 365         fe_status_t s = 0;
 366         int retval = 0;
 367         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 368
 369         /* if we've got no parameters, just keep idling */
 370         if (fepriv->state & FESTATE_IDLE) {
 371                 fepriv->delay = 3*HZ;
 372                 fepriv->quality = 0;
 373                 return;
 374         }
 375
 376         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 377         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 378                 if (fepriv->state & FESTATE_RETUNE) {
 379                         if (fe->ops.set_frontend)
 380                                 retval = fe->ops.set_frontend(fe,
 381                                                         &fepriv->parameters);
 382                         if (retval < 0)
 383                                 fepriv->state = FESTATE_ERROR;
 384                         else
 385                                 fepriv->state = FESTATE_TUNED;
 386                 }
 387                 fepriv->delay = 3*HZ;
 388                 fepriv->quality = 0;
 389                 return;
 390         }
 391
 392         /* get the frontend status */
 393         if (fepriv->state & FESTATE_RETUNE) {
 394                 s = 0;
 395         } else {
 396                 if (fe->ops.read_status)
 397                         fe->ops.read_status(fe, &s);
 398                 if (s != fepriv->status) {
 399                         dvb_frontend_add_event(fe, s);
 400                         fepriv->status = s;
 401                 }
 402         }
 403
 404         /* if we're not tuned, and we have a lock, move to the TUNED state */
 405         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 406                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 407                 fepriv->state = FESTATE_TUNED;
 408
 409                 /* if we're tuned, then we have determined the correct inversion */
 410                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 411                     (fepriv->parameters.inversion == INVERSION_AUTO)) {
 412                         fepriv->parameters.inversion = fepriv->inversion;
 413                 }
 414                 return;
 415         }
 416
 417         /* if we are tuned already, check we're still locked */
 418         if (fepriv->state & FESTATE_TUNED) {
 419                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 420
 421                 /* we're tuned, and the lock is still good... */
 422                 if (s & FE_HAS_LOCK) {
 423                         return;
 424                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 425                         fepriv->state = FESTATE_ZIGZAG_FAST;
 426                         fepriv->started_auto_step = fepriv->auto_step;
 427                         fepriv->check_wrapped = 0;
 428                 }
 429         }
 430
 431         /* don't actually do anything if we're in the LOSTLOCK state,
 432          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 433         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 434             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 435                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 436                 return;
 437         }
 438
 439         /* don't do anything if we're in the DISEQC state, since this
 440          * might be someone with a motorized dish controlled by DISEQC.
 441          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 442         if (fepriv->state & FESTATE_DISEQC) {
 443                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 444                 return;
 445         }
 446
 447         /* if we're in the RETUNE state, set everything up for a brand
 448          * new scan, keeping the current inversion setting, as the next
 449          * tune is _very_ likely to require the same */
 450         if (fepriv->state & FESTATE_RETUNE) {
 451                 fepriv->lnb_drift = 0;
 452                 fepriv->auto_step = 0;
 453                 fepriv->auto_sub_step = 0;
 454                 fepriv->started_auto_step = 0;
 455                 fepriv->check_wrapped = 0;
 456         }
 457
 458         /* fast zigzag. */
 459         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 460                 fepriv->delay = fepriv->min_delay;
 461
 462                 /* peform a tune */
 463                 retval = dvb_frontend_swzigzag_autotune(fe,
 464                                                         fepriv->check_wrapped);
 465                 if (retval < 0) {
 466                         return;
 467                 } else if (retval) {
 468                         /* OK, if we've run out of trials at the fast speed.
 469                          * Drop back to slow for the _next_ attempt */
 470                         fepriv->state = FESTATE_SEARCHING_SLOW;
 471                         fepriv->started_auto_step = fepriv->auto_step;
 472                         return;
 473                 }
 474                 fepriv->check_wrapped = 1;
 475
 476                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 477                  * This ensures we cannot return from an
 478                  * FE_SET_FRONTEND ioctl before the first frontend tune
 479                  * occurs */
 480                 if (fepriv->state & FESTATE_RETUNE) {
 481                         fepriv->state = FESTATE_TUNING_FAST;
 482                 }
 483         }
 484
 485         /* slow zigzag */
 486         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 487                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 488
 489                 /* Note: don't bother checking for wrapping; we stay in this
 490                  * state until we get a lock */
 491                 dvb_frontend_swzigzag_autotune(fe, 0);
 492         }
 493 }
 494
 495 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 496 {
 497         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 498
 499         if (fepriv->exit)
 500                 return 1;
 501
 502         if (fepriv->dvbdev->writers == 1)
 503                 if (time_after(jiffies, fepriv->release_jiffies +
 504                                   dvb_shutdown_timeout * HZ))
 505                         return 1;
 506
 507         return 0;
 508 }
 509
 510 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 511 {
 512         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 513
 514         if (fepriv->wakeup) {
 515                 fepriv->wakeup = 0;
 516                 return 1;
 517         }
 518         return dvb_frontend_is_exiting(fe);
 519 }
 520
 521 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 522 {
 523         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 524
 525         fepriv->wakeup = 1;
 526         wake_up_interruptible(&fepriv->wait_queue);
 527 }
 528
 529 static int dvb_frontend_thread(void *data)
 530 {
 531         struct dvb_frontend *fe = data;
 532         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 533         unsigned long timeout;
 534         fe_status_t s;
 535         enum dvbfe_algo algo;
 536
 537         struct dvb_frontend_parameters *params;
 538
 539         dprintk("%s\n", __func__);
 540
 541         fepriv->check_wrapped = 0;
 542         fepriv->quality = 0;
 543         fepriv->delay = 3*HZ;
 544         fepriv->status = 0;
 545         fepriv->wakeup = 0;
 546         fepriv->reinitialise = 0;
 547
 548         dvb_frontend_init(fe);
 549
 550         set_freezable();
 551         while (1) {
 552                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 553 restart:
 554                 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
 555                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 556                                 || freezing(current),
 557                         fepriv->delay);
 558
 559                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 560                         /* got signal or quitting */
 561                         fepriv->exit = 1;
 562                         break;
 563                 }
 564
 565                 if (try_to_freeze())
 566                         goto restart;
 567
 568                 if (down_interruptible(&fepriv->sem))
 569                         break;
 570
 571                 if (fepriv->reinitialise) {
 572                         dvb_frontend_init(fe);
 573                         if (fepriv->tone != -1) {
 574                                 fe->ops.set_tone(fe, fepriv->tone);
 575                         }
 576                         if (fepriv->voltage != -1) {
 577                                 fe->ops.set_voltage(fe, fepriv->voltage);
 578                         }
 579                         fepriv->reinitialise = 0;
 580                 }
 581
 582                 /* do an iteration of the tuning loop */
 583                 if (fe->ops.get_frontend_algo) {
 584                         algo = fe->ops.get_frontend_algo(fe);
 585                         switch (algo) {
 586                         case DVBFE_ALGO_HW:
 587                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 588                                 params = NULL; /* have we been asked to RETUNE ? */
 589
 590                                 if (fepriv->state & FESTATE_RETUNE) {
 591                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 592                                         params = &fepriv->parameters;
 593                                         fepriv->state = FESTATE_TUNED;
 594                                 }
 595
 596                                 if (fe->ops.tune)
 597                                         fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
 598
 599                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 600                                         dprintk("%s: state changed, adding current state\n", __func__);
 601                                         dvb_frontend_add_event(fe, s);
 602                                         fepriv->status = s;
 603                                 }
 604                                 break;
 605                         case DVBFE_ALGO_SW:
 606                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 607                                 dvb_frontend_swzigzag(fe);
 608                                 break;
 609                         case DVBFE_ALGO_CUSTOM:
 610                                 params = NULL; /* have we been asked to RETUNE ?        */
 611                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 612                                 if (fepriv->state & FESTATE_RETUNE) {
 613                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 614                                         params = &fepriv->parameters;
 615                                         fepriv->state = FESTATE_TUNED;
 616                                 }
 617                                 /* Case where we are going to search for a carrier
 618                                  * User asked us to retune again for some reason, possibly
 619                                  * requesting a search with a new set of parameters
 620                                  */
 621                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 622                                         if (fe->ops.search) {
 623                                                 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
 624                                                 /* We did do a search as was requested, the flags are
 625                                                  * now unset as well and has the flags wrt to search.
 626                                                  */
 627                                         } else {
 628                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 629                                         }
 630                                 }
 631                                 /* Track the carrier if the search was successful */
 632                                 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
 633                                         if (fe->ops.track)
 634                                                 fe->ops.track(fe, &fepriv->parameters);
 635                                 } else {
 636                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 637                                         fepriv->delay = HZ / 2;
 638                                 }
 639                                 fe->ops.read_status(fe, &s);
 640                                 if (s != fepriv->status) {
 641                                         dvb_frontend_add_event(fe, s); /* update event list */
 642                                         fepriv->status = s;
 643                                         if (!(s & FE_HAS_LOCK)) {
 644                                                 fepriv->delay = HZ / 10;
 645                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 646                                         } else {
 647                                                 fepriv->delay = 60 * HZ;
 648                                         }
 649                                 }
 650                                 break;
 651                         default:
 652                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 653                                 break;
 654                         }
 655                 } else {
 656                         dvb_frontend_swzigzag(fe);
 657                 }
 658         }
 659
 660         if (dvb_powerdown_on_sleep) {
 661                 if (fe->ops.set_voltage)
 662                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 663                 if (fe->ops.tuner_ops.sleep) {
 664                         if (fe->ops.i2c_gate_ctrl)
 665                                 fe->ops.i2c_gate_ctrl(fe, 1);
 666                         fe->ops.tuner_ops.sleep(fe);
 667                         if (fe->ops.i2c_gate_ctrl)
 668                                 fe->ops.i2c_gate_ctrl(fe, 0);
 669                 }
 670                 if (fe->ops.sleep)
 671                         fe->ops.sleep(fe);
 672         }
 673
 674         fepriv->thread = NULL;
 675         fepriv->exit = 0;
 676         mb();
 677
 678         dvb_frontend_wakeup(fe);
 679         return 0;
 680 }
 681
 682 static void dvb_frontend_stop(struct dvb_frontend *fe)
 683 {
 684         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 685
 686         dprintk ("%s\n", __func__);
 687
 688         fepriv->exit = 1;
 689         mb();
 690
 691         if (!fepriv->thread)
 692                 return;
 693
 694         kthread_stop(fepriv->thread);
 695
 696         init_MUTEX (&fepriv->sem);
 697         fepriv->state = FESTATE_IDLE;
 698
 699         /* paranoia check in case a signal arrived */
 700         if (fepriv->thread)
 701                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 702                                 fepriv->thread);
 703 }
 704
 705 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 706 {
 707         return ((curtime.tv_usec < lasttime.tv_usec) ?
 708                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 709                 curtime.tv_usec - lasttime.tv_usec);
 710 }
 711 EXPORT_SYMBOL(timeval_usec_diff);
 712
 713 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 714 {
 715         curtime->tv_usec += add_usec;
 716         if (curtime->tv_usec >= 1000000) {
 717                 curtime->tv_usec -= 1000000;
 718                 curtime->tv_sec++;
 719         }
 720 }
 721
 722 /*
 723  * Sleep until gettimeofday() > waketime + add_usec
 724  * This needs to be as precise as possible, but as the delay is
 725  * usually between 2ms and 32ms, it is done using a scheduled msleep
 726  * followed by usleep (normally a busy-wait loop) for the remainder
 727  */
 728 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 729 {
 730         struct timeval lasttime;
 731         s32 delta, newdelta;
 732
 733         timeval_usec_add(waketime, add_usec);
 734
 735         do_gettimeofday(&lasttime);
 736         delta = timeval_usec_diff(lasttime, *waketime);
 737         if (delta > 2500) {
 738                 msleep((delta - 1500) / 1000);
 739                 do_gettimeofday(&lasttime);
 740                 newdelta = timeval_usec_diff(lasttime, *waketime);
 741                 delta = (newdelta > delta) ? 0 : newdelta;
 742         }
 743         if (delta > 0)
 744                 udelay(delta);
 745 }
 746 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 747
 748 static int dvb_frontend_start(struct dvb_frontend *fe)
 749 {
 750         int ret;
 751         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 752         struct task_struct *fe_thread;
 753
 754         dprintk ("%s\n", __func__);
 755
 756         if (fepriv->thread) {
 757                 if (!fepriv->exit)
 758                         return 0;
 759                 else
 760                         dvb_frontend_stop (fe);
 761         }
 762
 763         if (signal_pending(current))
 764                 return -EINTR;
 765         if (down_interruptible (&fepriv->sem))
 766                 return -EINTR;
 767
 768         fepriv->state = FESTATE_IDLE;
 769         fepriv->exit = 0;
 770         fepriv->thread = NULL;
 771         mb();
 772
 773         fe_thread = kthread_run(dvb_frontend_thread, fe,
 774                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 775         if (IS_ERR(fe_thread)) {
 776                 ret = PTR_ERR(fe_thread);
 777                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 778                 up(&fepriv->sem);
 779                 return ret;
 780         }
 781         fepriv->thread = fe_thread;
 782         return 0;
 783 }
 784
 785 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
 786                                         u32 *freq_min, u32 *freq_max)
 787 {
 788         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 789
 790         if (fe->ops.info.frequency_max == 0)
 791                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 792         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 793                 *freq_max = fe->ops.info.frequency_max;
 794         else
 795                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 796
 797         if (*freq_min == 0 || *freq_max == 0)
 798                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 799                        fe->dvb->num,fe->id);
 800 }
 801
 802 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 803                                 struct dvb_frontend_parameters *parms)
 804 {
 805         u32 freq_min;
 806         u32 freq_max;
 807
 808         /* range check: frequency */
 809         dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
 810         if ((freq_min && parms->frequency < freq_min) ||
 811             (freq_max && parms->frequency > freq_max)) {
 812                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 813                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 814                 return -EINVAL;
 815         }
 816
 817         /* range check: symbol rate */
 818         if (fe->ops.info.type == FE_QPSK) {
 819                 if ((fe->ops.info.symbol_rate_min &&
 820                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 821                     (fe->ops.info.symbol_rate_max &&
 822                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 823                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 824                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 825                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 826                         return -EINVAL;
 827                 }
 828
 829         } else if (fe->ops.info.type == FE_QAM) {
 830                 if ((fe->ops.info.symbol_rate_min &&
 831                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 832                     (fe->ops.info.symbol_rate_max &&
 833                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 834                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 835                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 836                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 837                         return -EINVAL;
 838                 }
 839         }
 840
 841         /* check for supported modulation */
 842         if (fe->ops.info.type == FE_QAM &&
 843             (parms->u.qam.modulation > QAM_AUTO ||
 844              !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
 845                 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
 846                        fe->dvb->num, fe->id, parms->u.qam.modulation);
 847                         return -EINVAL;
 848         }
 849
 850         return 0;
 851 }
 852
 853 static struct dtv_cmds_h dtv_cmds[] = {
 854         [DTV_TUNE] = {
 855                 .name   = "DTV_TUNE",
 856                 .cmd    = DTV_TUNE,
 857                 .set    = 1,
 858         },
 859         [DTV_CLEAR] = {
 860                 .name   = "DTV_CLEAR",
 861                 .cmd    = DTV_CLEAR,
 862                 .set    = 1,
 863         },
 864
 865         /* Set */
 866         [DTV_FREQUENCY] = {
 867                 .name   = "DTV_FREQUENCY",
 868                 .cmd    = DTV_FREQUENCY,
 869                 .set    = 1,
 870         },
 871         [DTV_BANDWIDTH_HZ] = {
 872                 .name   = "DTV_BANDWIDTH_HZ",
 873                 .cmd    = DTV_BANDWIDTH_HZ,
 874                 .set    = 1,
 875         },
 876         [DTV_MODULATION] = {
 877                 .name   = "DTV_MODULATION",
 878                 .cmd    = DTV_MODULATION,
 879                 .set    = 1,
 880         },
 881         [DTV_INVERSION] = {
 882                 .name   = "DTV_INVERSION",
 883                 .cmd    = DTV_INVERSION,
 884                 .set    = 1,
 885         },
 886         [DTV_DISEQC_MASTER] = {
 887                 .name   = "DTV_DISEQC_MASTER",
 888                 .cmd    = DTV_DISEQC_MASTER,
 889                 .set    = 1,
 890                 .buffer = 1,
 891         },
 892         [DTV_SYMBOL_RATE] = {
 893                 .name   = "DTV_SYMBOL_RATE",
 894                 .cmd    = DTV_SYMBOL_RATE,
 895                 .set    = 1,
 896         },
 897         [DTV_INNER_FEC] = {
 898                 .name   = "DTV_INNER_FEC",
 899                 .cmd    = DTV_INNER_FEC,
 900                 .set    = 1,
 901         },
 902         [DTV_VOLTAGE] = {
 903                 .name   = "DTV_VOLTAGE",
 904                 .cmd    = DTV_VOLTAGE,
 905                 .set    = 1,
 906         },
 907         [DTV_TONE] = {
 908                 .name   = "DTV_TONE",
 909                 .cmd    = DTV_TONE,
 910                 .set    = 1,
 911         },
 912         [DTV_PILOT] = {
 913                 .name   = "DTV_PILOT",
 914                 .cmd    = DTV_PILOT,
 915                 .set    = 1,
 916         },
 917         [DTV_ROLLOFF] = {
 918                 .name   = "DTV_ROLLOFF",
 919                 .cmd    = DTV_ROLLOFF,
 920                 .set    = 1,
 921         },
 922         [DTV_DELIVERY_SYSTEM] = {
 923                 .name   = "DTV_DELIVERY_SYSTEM",
 924                 .cmd    = DTV_DELIVERY_SYSTEM,
 925                 .set    = 1,
 926         },
 927         [DTV_HIERARCHY] = {
 928                 .name   = "DTV_HIERARCHY",
 929                 .cmd    = DTV_HIERARCHY,
 930                 .set    = 1,
 931         },
 932         [DTV_CODE_RATE_HP] = {
 933                 .name   = "DTV_CODE_RATE_HP",
 934                 .cmd    = DTV_CODE_RATE_HP,
 935                 .set    = 1,
 936         },
 937         [DTV_CODE_RATE_LP] = {
 938                 .name   = "DTV_CODE_RATE_LP",
 939                 .cmd    = DTV_CODE_RATE_LP,
 940                 .set    = 1,
 941         },
 942         [DTV_GUARD_INTERVAL] = {
 943                 .name   = "DTV_GUARD_INTERVAL",
 944                 .cmd    = DTV_GUARD_INTERVAL,
 945                 .set    = 1,
 946         },
 947         [DTV_TRANSMISSION_MODE] = {
 948                 .name   = "DTV_TRANSMISSION_MODE",
 949                 .cmd    = DTV_TRANSMISSION_MODE,
 950                 .set    = 1,
 951         },
 952         /* Get */
 953         [DTV_DISEQC_SLAVE_REPLY] = {
 954                 .name   = "DTV_DISEQC_SLAVE_REPLY",
 955                 .cmd    = DTV_DISEQC_SLAVE_REPLY,
 956                 .set    = 0,
 957                 .buffer = 1,
 958         },
 959         [DTV_API_VERSION] = {
 960                 .name   = "DTV_API_VERSION",
 961                 .cmd    = DTV_API_VERSION,
 962                 .set    = 0,
 963         },
 964         [DTV_CODE_RATE_HP] = {
 965                 .name   = "DTV_CODE_RATE_HP",
 966                 .cmd    = DTV_CODE_RATE_HP,
 967                 .set    = 0,
 968         },
 969         [DTV_CODE_RATE_LP] = {
 970                 .name   = "DTV_CODE_RATE_LP",
 971                 .cmd    = DTV_CODE_RATE_LP,
 972                 .set    = 0,
 973         },
 974         [DTV_GUARD_INTERVAL] = {
 975                 .name   = "DTV_GUARD_INTERVAL",
 976                 .cmd    = DTV_GUARD_INTERVAL,
 977                 .set    = 0,
 978         },
 979         [DTV_TRANSMISSION_MODE] = {
 980                 .name   = "DTV_TRANSMISSION_MODE",
 981                 .cmd    = DTV_TRANSMISSION_MODE,
 982                 .set    = 0,
 983         },
 984         [DTV_HIERARCHY] = {
 985                 .name   = "DTV_HIERARCHY",
 986                 .cmd    = DTV_HIERARCHY,
 987                 .set    = 0,
 988         },
 989 };
 990
 991 static void dtv_property_dump(struct dtv_property *tvp)
 992 {
 993         int i;
 994
 995         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 996                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 997                         __func__, tvp->cmd);
 998                 return;
 999         }
1000
1001         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
1002                 ,__func__
1003                 ,tvp->cmd
1004                 ,dtv_cmds[ tvp->cmd ].name);
1005
1006         if(dtv_cmds[ tvp->cmd ].buffer) {
1007
1008                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1009                         ,__func__
1010                         ,tvp->u.buffer.len);
1011
1012                 for(i = 0; i < tvp->u.buffer.len; i++)
1013                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1014                                 ,__func__
1015                                 ,i
1016                                 ,tvp->u.buffer.data[i]);
1017
1018         } else
1019                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1020 }
1021
1022 static int is_legacy_delivery_system(fe_delivery_system_t s)
1023 {
1024         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1025            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1026            (s == SYS_ATSC))
1027                 return 1;
1028
1029         return 0;
1030 }
1031
1032 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1033  * drivers can use a single set_frontend tuning function, regardless of whether
1034  * it's being used for the legacy or new API, reducing code and complexity.
1035  */
1036 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1037                                     struct dvb_frontend_parameters *p)
1038 {
1039         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1040
1041         c->frequency = p->frequency;
1042         c->inversion = p->inversion;
1043
1044         switch (fe->ops.info.type) {
1045         case FE_QPSK:
1046                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1047                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1048                 c->symbol_rate = p->u.qpsk.symbol_rate;
1049                 c->fec_inner = p->u.qpsk.fec_inner;
1050                 c->delivery_system = SYS_DVBS;
1051                 break;
1052         case FE_QAM:
1053                 c->symbol_rate = p->u.qam.symbol_rate;
1054                 c->fec_inner = p->u.qam.fec_inner;
1055                 c->modulation = p->u.qam.modulation;
1056                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1057                 break;
1058         case FE_OFDM:
1059                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1060                         c->bandwidth_hz = 6000000;
1061                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1062                         c->bandwidth_hz = 7000000;
1063                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1064                         c->bandwidth_hz = 8000000;
1065                 else
1066                         /* Including BANDWIDTH_AUTO */
1067                         c->bandwidth_hz = 0;
1068                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1069                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1070                 c->modulation = p->u.ofdm.constellation;
1071                 c->transmission_mode = p->u.ofdm.transmission_mode;
1072                 c->guard_interval = p->u.ofdm.guard_interval;
1073                 c->hierarchy = p->u.ofdm.hierarchy_information;
1074                 c->delivery_system = SYS_DVBT;
1075                 break;
1076         case FE_ATSC:
1077                 c->modulation = p->u.vsb.modulation;
1078                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1079                         c->delivery_system = SYS_ATSC;
1080                 else
1081                         c->delivery_system = SYS_DVBC_ANNEX_B;
1082                 break;
1083         }
1084 }
1085
1086 /* Ensure the cached values are set correctly in the frontend
1087  * legacy tuning structures, for the advanced tuning API.
1088  */
1089 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1090 {
1091         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1092         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1093         struct dvb_frontend_parameters *p = &fepriv->parameters;
1094
1095         p->frequency = c->frequency;
1096         p->inversion = c->inversion;
1097
1098         switch (fe->ops.info.type) {
1099         case FE_QPSK:
1100                 dprintk("%s() Preparing QPSK req\n", __func__);
1101                 p->u.qpsk.symbol_rate = c->symbol_rate;
1102                 p->u.qpsk.fec_inner = c->fec_inner;
1103                 c->delivery_system = SYS_DVBS;
1104                 break;
1105         case FE_QAM:
1106                 dprintk("%s() Preparing QAM req\n", __func__);
1107                 p->u.qam.symbol_rate = c->symbol_rate;
1108                 p->u.qam.fec_inner = c->fec_inner;
1109                 p->u.qam.modulation = c->modulation;
1110                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1111                 break;
1112         case FE_OFDM:
1113                 dprintk("%s() Preparing OFDM req\n", __func__);
1114                 if (c->bandwidth_hz == 6000000)
1115                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1116                 else if (c->bandwidth_hz == 7000000)
1117                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1118                 else if (c->bandwidth_hz == 8000000)
1119                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1120                 else
1121                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1122                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1123                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1124                 p->u.ofdm.constellation = c->modulation;
1125                 p->u.ofdm.transmission_mode = c->transmission_mode;
1126                 p->u.ofdm.guard_interval = c->guard_interval;
1127                 p->u.ofdm.hierarchy_information = c->hierarchy;
1128                 c->delivery_system = SYS_DVBT;
1129                 break;
1130         case FE_ATSC:
1131                 dprintk("%s() Preparing VSB req\n", __func__);
1132                 p->u.vsb.modulation = c->modulation;
1133                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1134                         c->delivery_system = SYS_ATSC;
1135                 else
1136                         c->delivery_system = SYS_DVBC_ANNEX_B;
1137                 break;
1138         }
1139 }
1140
1141 /* Ensure the cached values are set correctly in the frontend
1142  * legacy tuning structures, for the legacy tuning API.
1143  */
1144 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1145 {
1146         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1147         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1148         struct dvb_frontend_parameters *p = &fepriv->parameters;
1149
1150         p->frequency = c->frequency;
1151         p->inversion = c->inversion;
1152
1153         switch(c->modulation) {
1154         case PSK_8:
1155         case APSK_16:
1156         case APSK_32:
1157         case QPSK:
1158                 p->u.qpsk.symbol_rate = c->symbol_rate;
1159                 p->u.qpsk.fec_inner = c->fec_inner;
1160                 break;
1161         default:
1162                 break;
1163         }
1164
1165         if(c->delivery_system == SYS_ISDBT) {
1166                 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1167                 p->frequency = c->frequency;
1168                 p->inversion = INVERSION_AUTO;
1169                 p->u.ofdm.constellation = QAM_AUTO;
1170                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1171                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1172                 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1173                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1174                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1175                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1176         }
1177 }
1178
1179 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1180 {
1181         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1182
1183         /* For legacy delivery systems we don't need the delivery_system to
1184          * be specified, but we populate the older structures from the cache
1185          * so we can call set_frontend on older drivers.
1186          */
1187         if(is_legacy_delivery_system(c->delivery_system)) {
1188
1189                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1190                 dtv_property_legacy_params_sync(fe);
1191
1192         } else {
1193                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1194
1195                 /* For advanced delivery systems / modulation types ...
1196                  * we seed the lecacy dvb_frontend_parameters structure
1197                  * so that the sanity checking code later in the IOCTL processing
1198                  * can validate our basic frequency ranges, symbolrates, modulation
1199                  * etc.
1200                  */
1201                 dtv_property_adv_params_sync(fe);
1202         }
1203 }
1204
1205 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1206                         unsigned int cmd, void *parg);
1207 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1208                         unsigned int cmd, void *parg);
1209
1210 static int dtv_property_process_get(struct dvb_frontend *fe,
1211                                     struct dtv_property *tvp,
1212                                     struct inode *inode, struct file *file)
1213 {
1214         int r = 0;
1215
1216         dtv_property_dump(tvp);
1217
1218         /* Allow the frontend to validate incoming properties */
1219         if (fe->ops.get_property)
1220                 r = fe->ops.get_property(fe, tvp);
1221
1222         if (r < 0)
1223                 return r;
1224
1225         switch(tvp->cmd) {
1226         case DTV_FREQUENCY:
1227                 tvp->u.data = fe->dtv_property_cache.frequency;
1228                 break;
1229         case DTV_MODULATION:
1230                 tvp->u.data = fe->dtv_property_cache.modulation;
1231                 break;
1232         case DTV_BANDWIDTH_HZ:
1233                 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1234                 break;
1235         case DTV_INVERSION:
1236                 tvp->u.data = fe->dtv_property_cache.inversion;
1237                 break;
1238         case DTV_SYMBOL_RATE:
1239                 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1240                 break;
1241         case DTV_INNER_FEC:
1242                 tvp->u.data = fe->dtv_property_cache.fec_inner;
1243                 break;
1244         case DTV_PILOT:
1245                 tvp->u.data = fe->dtv_property_cache.pilot;
1246                 break;
1247         case DTV_ROLLOFF:
1248                 tvp->u.data = fe->dtv_property_cache.rolloff;
1249                 break;
1250         case DTV_DELIVERY_SYSTEM:
1251                 tvp->u.data = fe->dtv_property_cache.delivery_system;
1252                 break;
1253         case DTV_VOLTAGE:
1254                 tvp->u.data = fe->dtv_property_cache.voltage;
1255                 break;
1256         case DTV_TONE:
1257                 tvp->u.data = fe->dtv_property_cache.sectone;
1258                 break;
1259         case DTV_API_VERSION:
1260                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1261                 break;
1262         case DTV_CODE_RATE_HP:
1263                 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1264                 break;
1265         case DTV_CODE_RATE_LP:
1266                 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1267                 break;
1268         case DTV_GUARD_INTERVAL:
1269                 tvp->u.data = fe->dtv_property_cache.guard_interval;
1270                 break;
1271         case DTV_TRANSMISSION_MODE:
1272                 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1273                 break;
1274         case DTV_HIERARCHY:
1275                 tvp->u.data = fe->dtv_property_cache.hierarchy;
1276                 break;
1277         default:
1278                 r = -1;
1279         }
1280
1281         return r;
1282 }
1283
1284 static int dtv_property_process_set(struct dvb_frontend *fe,
1285                                     struct dtv_property *tvp,
1286                                     struct inode *inode,
1287                                     struct file *file)
1288 {
1289         int r = 0;
1290         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1291         dtv_property_dump(tvp);
1292
1293         /* Allow the frontend to validate incoming properties */
1294         if (fe->ops.set_property)
1295                 r = fe->ops.set_property(fe, tvp);
1296
1297         if (r < 0)
1298                 return r;
1299
1300         switch(tvp->cmd) {
1301         case DTV_CLEAR:
1302                 /* Reset a cache of data specific to the frontend here. This does
1303                  * not effect hardware.
1304                  */
1305                 dprintk("%s() Flushing property cache\n", __func__);
1306                 memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1307                 fe->dtv_property_cache.state = tvp->cmd;
1308                 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1309                 break;
1310         case DTV_TUNE:
1311                 /* interpret the cache of data, build either a traditional frontend
1312                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1313                  * ioctl.
1314                  */
1315                 fe->dtv_property_cache.state = tvp->cmd;
1316                 dprintk("%s() Finalised property cache\n", __func__);
1317                 dtv_property_cache_submit(fe);
1318
1319                 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1320                         &fepriv->parameters);
1321                 break;
1322         case DTV_FREQUENCY:
1323                 fe->dtv_property_cache.frequency = tvp->u.data;
1324                 break;
1325         case DTV_MODULATION:
1326                 fe->dtv_property_cache.modulation = tvp->u.data;
1327                 break;
1328         case DTV_BANDWIDTH_HZ:
1329                 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1330                 break;
1331         case DTV_INVERSION:
1332                 fe->dtv_property_cache.inversion = tvp->u.data;
1333                 break;
1334         case DTV_SYMBOL_RATE:
1335                 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1336                 break;
1337         case DTV_INNER_FEC:
1338                 fe->dtv_property_cache.fec_inner = tvp->u.data;
1339                 break;
1340         case DTV_PILOT:
1341                 fe->dtv_property_cache.pilot = tvp->u.data;
1342                 break;
1343         case DTV_ROLLOFF:
1344                 fe->dtv_property_cache.rolloff = tvp->u.data;
1345                 break;
1346         case DTV_DELIVERY_SYSTEM:
1347                 fe->dtv_property_cache.delivery_system = tvp->u.data;
1348                 break;
1349         case DTV_VOLTAGE:
1350                 fe->dtv_property_cache.voltage = tvp->u.data;
1351                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1352                         (void *)fe->dtv_property_cache.voltage);
1353                 break;
1354         case DTV_TONE:
1355                 fe->dtv_property_cache.sectone = tvp->u.data;
1356                 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1357                         (void *)fe->dtv_property_cache.sectone);
1358                 break;
1359         case DTV_CODE_RATE_HP:
1360                 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1361                 break;
1362         case DTV_CODE_RATE_LP:
1363                 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1364                 break;
1365         case DTV_GUARD_INTERVAL:
1366                 fe->dtv_property_cache.guard_interval = tvp->u.data;
1367                 break;
1368         case DTV_TRANSMISSION_MODE:
1369                 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1370                 break;
1371         case DTV_HIERARCHY:
1372                 fe->dtv_property_cache.hierarchy = tvp->u.data;
1373                 break;
1374         default:
1375                 r = -1;
1376         }
1377
1378         return r;
1379 }
1380
1381 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1382                         unsigned int cmd, void *parg)
1383 {
1384         struct dvb_device *dvbdev = file->private_data;
1385         struct dvb_frontend *fe = dvbdev->priv;
1386         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1387         int err = -EOPNOTSUPP;
1388
1389         dprintk ("%s\n", __func__);
1390
1391         if (fepriv->exit)
1392                 return -ENODEV;
1393
1394         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1395             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1396              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1397                 return -EPERM;
1398
1399         if (down_interruptible (&fepriv->sem))
1400                 return -ERESTARTSYS;
1401
1402         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1403                 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1404         else {
1405                 fe->dtv_property_cache.state = DTV_UNDEFINED;
1406                 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1407         }
1408
1409         up(&fepriv->sem);
1410         return err;
1411 }
1412
1413 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1414                         unsigned int cmd, void *parg)
1415 {
1416         struct dvb_device *dvbdev = file->private_data;
1417         struct dvb_frontend *fe = dvbdev->priv;
1418         int err = 0;
1419
1420         struct dtv_properties *tvps = NULL;
1421         struct dtv_property *tvp = NULL;
1422         int i;
1423
1424         dprintk("%s\n", __func__);
1425
1426         if(cmd == FE_SET_PROPERTY) {
1427                 tvps = (struct dtv_properties __user *)parg;
1428
1429                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1430                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1431
1432                 /* Put an arbitrary limit on the number of messages that can
1433                  * be sent at once */
1434                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1435                         return -EINVAL;
1436
1437                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1438                         sizeof(struct dtv_property), GFP_KERNEL);
1439                 if (!tvp) {
1440                         err = -ENOMEM;
1441                         goto out;
1442                 }
1443
1444                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1445                         err = -EFAULT;
1446                         goto out;
1447                 }
1448
1449                 for (i = 0; i < tvps->num; i++) {
1450                         (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1451                         err |= (tvp + i)->result;
1452                 }
1453
1454                 if(fe->dtv_property_cache.state == DTV_TUNE)
1455                         dprintk("%s() Property cache is full, tuning\n", __func__);
1456
1457         } else
1458         if(cmd == FE_GET_PROPERTY) {
1459
1460                 tvps = (struct dtv_properties __user *)parg;
1461
1462                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1463                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1464
1465                 /* Put an arbitrary limit on the number of messages that can
1466                  * be sent at once */
1467                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1468                         return -EINVAL;
1469
1470                 tvp = (struct dtv_property *) kmalloc(tvps->num *
1471                         sizeof(struct dtv_property), GFP_KERNEL);
1472                 if (!tvp) {
1473                         err = -ENOMEM;
1474                         goto out;
1475                 }
1476
1477                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1478                         err = -EFAULT;
1479                         goto out;
1480                 }
1481
1482                 for (i = 0; i < tvps->num; i++) {
1483                         (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1484                         err |= (tvp + i)->result;
1485                 }
1486
1487                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1488                         err = -EFAULT;
1489                         goto out;
1490                 }
1491
1492         } else
1493                 err = -EOPNOTSUPP;
1494
1495 out:
1496         kfree(tvp);
1497         return err;
1498 }
1499
1500 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1501                         unsigned int cmd, void *parg)
1502 {
1503         struct dvb_device *dvbdev = file->private_data;
1504         struct dvb_frontend *fe = dvbdev->priv;
1505         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1506         int err = -EOPNOTSUPP;
1507
1508         switch (cmd) {
1509         case FE_GET_INFO: {
1510                 struct dvb_frontend_info* info = parg;
1511                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1512                 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1513
1514                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1515                  * do it, it is done for it. */
1516                 info->caps |= FE_CAN_INVERSION_AUTO;
1517                 err = 0;
1518                 break;
1519         }
1520
1521         case FE_READ_STATUS: {
1522                 fe_status_t* status = parg;
1523
1524                 /* if retune was requested but hasn't occured yet, prevent
1525                  * that user get signal state from previous tuning */
1526                 if (fepriv->state == FESTATE_RETUNE ||
1527                     fepriv->state == FESTATE_ERROR) {
1528                         err=0;
1529                         *status = 0;
1530                         break;
1531                 }
1532
1533                 if (fe->ops.read_status)
1534                         err = fe->ops.read_status(fe, status);
1535                 break;
1536         }
1537         case FE_READ_BER:
1538                 if (fe->ops.read_ber)
1539                         err = fe->ops.read_ber(fe, (__u32*) parg);
1540                 break;
1541
1542         case FE_READ_SIGNAL_STRENGTH:
1543                 if (fe->ops.read_signal_strength)
1544                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1545                 break;
1546
1547         case FE_READ_SNR:
1548                 if (fe->ops.read_snr)
1549                         err = fe->ops.read_snr(fe, (__u16*) parg);
1550                 break;
1551
1552         case FE_READ_UNCORRECTED_BLOCKS:
1553                 if (fe->ops.read_ucblocks)
1554                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1555                 break;
1556
1557
1558         case FE_DISEQC_RESET_OVERLOAD:
1559                 if (fe->ops.diseqc_reset_overload) {
1560                         err = fe->ops.diseqc_reset_overload(fe);
1561                         fepriv->state = FESTATE_DISEQC;
1562                         fepriv->status = 0;
1563                 }
1564                 break;
1565
1566         case FE_DISEQC_SEND_MASTER_CMD:
1567                 if (fe->ops.diseqc_send_master_cmd) {
1568                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1569                         fepriv->state = FESTATE_DISEQC;
1570                         fepriv->status = 0;
1571                 }
1572                 break;
1573
1574         case FE_DISEQC_SEND_BURST:
1575                 if (fe->ops.diseqc_send_burst) {
1576                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1577                         fepriv->state = FESTATE_DISEQC;
1578                         fepriv->status = 0;
1579                 }
1580                 break;
1581
1582         case FE_SET_TONE:
1583                 if (fe->ops.set_tone) {
1584                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1585                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1586                         fepriv->state = FESTATE_DISEQC;
1587                         fepriv->status = 0;
1588                 }
1589                 break;
1590
1591         case FE_SET_VOLTAGE:
1592                 if (fe->ops.set_voltage) {
1593                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1594                         fepriv->voltage = (fe_sec_voltage_t) parg;
1595                         fepriv->state = FESTATE_DISEQC;
1596                         fepriv->status = 0;
1597                 }
1598                 break;
1599
1600         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1601                 if (fe->ops.dishnetwork_send_legacy_command) {
1602                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1603                         fepriv->state = FESTATE_DISEQC;
1604                         fepriv->status = 0;
1605                 } else if (fe->ops.set_voltage) {
1606                         /*
1607                          * NOTE: This is a fallback condition.  Some frontends
1608                          * (stv0299 for instance) take longer than 8msec to
1609                          * respond to a set_voltage command.  Those switches
1610                          * need custom routines to switch properly.  For all
1611                          * other frontends, the following shoule work ok.
1612                          * Dish network legacy switches (as used by Dish500)
1613                          * are controlled by sending 9-bit command words
1614                          * spaced 8msec apart.
1615                          * the actual command word is switch/port dependant
1616                          * so it is up to the userspace application to send
1617                          * the right command.
1618                          * The command must always start with a '0' after
1619                          * initialization, so parg is 8 bits and does not
1620                          * include the initialization or start bit
1621                          */
1622                         unsigned long swcmd = ((unsigned long) parg) << 1;
1623                         struct timeval nexttime;
1624                         struct timeval tv[10];
1625                         int i;
1626                         u8 last = 1;
1627                         if (dvb_frontend_debug)
1628                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1629                         do_gettimeofday(&nexttime);
1630                         if (dvb_frontend_debug)
1631                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1632                         /* before sending a command, initialize by sending
1633                          * a 32ms 18V to the switch
1634                          */
1635                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1636                         dvb_frontend_sleep_until(&nexttime, 32000);
1637
1638                         for (i = 0; i < 9; i++) {
1639                                 if (dvb_frontend_debug)
1640                                         do_gettimeofday(&tv[i + 1]);
1641                                 if ((swcmd & 0x01) != last) {
1642                                         /* set voltage to (last ? 13V : 18V) */
1643                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1644                                         last = (last) ? 0 : 1;
1645                                 }
1646                                 swcmd = swcmd >> 1;
1647                                 if (i != 8)
1648                                         dvb_frontend_sleep_until(&nexttime, 8000);
1649                         }
1650                         if (dvb_frontend_debug) {
1651                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1652                                         __func__, fe->dvb->num);
1653                                 for (i = 1; i < 10; i++)
1654                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1655                         }
1656                         err = 0;
1657                         fepriv->state = FESTATE_DISEQC;
1658                         fepriv->status = 0;
1659                 }
1660                 break;
1661
1662         case FE_DISEQC_RECV_SLAVE_REPLY:
1663                 if (fe->ops.diseqc_recv_slave_reply)
1664                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1665                 break;
1666
1667         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1668                 if (fe->ops.enable_high_lnb_voltage)
1669                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1670                 break;
1671
1672         case FE_SET_FRONTEND: {
1673                 struct dvb_frontend_tune_settings fetunesettings;
1674
1675                 if(fe->dtv_property_cache.state == DTV_TUNE) {
1676                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1677                                 err = -EINVAL;
1678                                 break;
1679                         }
1680                 } else {
1681                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1682                                 err = -EINVAL;
1683                                 break;
1684                         }
1685
1686                         memcpy (&fepriv->parameters, parg,
1687                                 sizeof (struct dvb_frontend_parameters));
1688                         dtv_property_cache_sync(fe, &fepriv->parameters);
1689                 }
1690
1691                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1692                 memcpy(&fetunesettings.parameters, parg,
1693                        sizeof (struct dvb_frontend_parameters));
1694
1695                 /* force auto frequency inversion if requested */
1696                 if (dvb_force_auto_inversion) {
1697                         fepriv->parameters.inversion = INVERSION_AUTO;
1698                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1699                 }
1700                 if (fe->ops.info.type == FE_OFDM) {
1701                         /* without hierarchical coding code_rate_LP is irrelevant,
1702                          * so we tolerate the otherwise invalid FEC_NONE setting */
1703                         if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1704                             fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1705                                 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1706                 }
1707
1708                 /* get frontend-specific tuning settings */
1709                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1710                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1711                         fepriv->max_drift = fetunesettings.max_drift;
1712                         fepriv->step_size = fetunesettings.step_size;
1713                 } else {
1714                         /* default values */
1715                         switch(fe->ops.info.type) {
1716                         case FE_QPSK:
1717                                 fepriv->min_delay = HZ/20;
1718                                 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1719                                 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1720                                 break;
1721
1722                         case FE_QAM:
1723                                 fepriv->min_delay = HZ/20;
1724                                 fepriv->step_size = 0; /* no zigzag */
1725                                 fepriv->max_drift = 0;
1726                                 break;
1727
1728                         case FE_OFDM:
1729                                 fepriv->min_delay = HZ/20;
1730                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1731                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1732                                 break;
1733                         case FE_ATSC:
1734                                 fepriv->min_delay = HZ/20;
1735                                 fepriv->step_size = 0;
1736                                 fepriv->max_drift = 0;
1737                                 break;
1738                         }
1739                 }
1740                 if (dvb_override_tune_delay > 0)
1741                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1742
1743                 fepriv->state = FESTATE_RETUNE;
1744
1745                 /* Request the search algorithm to search */
1746                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1747
1748                 dvb_frontend_wakeup(fe);
1749                 dvb_frontend_add_event(fe, 0);
1750                 fepriv->status = 0;
1751                 err = 0;
1752                 break;
1753         }
1754
1755         case FE_GET_EVENT:
1756                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1757                 break;
1758
1759         case FE_GET_FRONTEND:
1760                 if (fe->ops.get_frontend) {
1761                         memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1762                         err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1763                 }
1764                 break;
1765
1766         case FE_SET_FRONTEND_TUNE_MODE:
1767                 fepriv->tune_mode_flags = (unsigned long) parg;
1768                 err = 0;
1769                 break;
1770         };
1771
1772         return err;
1773 }
1774
1775
1776 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1777 {
1778         struct dvb_device *dvbdev = file->private_data;
1779         struct dvb_frontend *fe = dvbdev->priv;
1780         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1781
1782         dprintk ("%s\n", __func__);
1783
1784         poll_wait (file, &fepriv->events.wait_queue, wait);
1785
1786         if (fepriv->events.eventw != fepriv->events.eventr)
1787                 return (POLLIN | POLLRDNORM | POLLPRI);
1788
1789         return 0;
1790 }
1791
1792 static int dvb_frontend_open(struct inode *inode, struct file *file)
1793 {
1794         struct dvb_device *dvbdev = file->private_data;
1795         struct dvb_frontend *fe = dvbdev->priv;
1796         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1797         struct dvb_adapter *adapter = fe->dvb;
1798         int ret;
1799
1800         dprintk ("%s\n", __func__);
1801
1802         if (adapter->mfe_shared) {
1803                 mutex_lock (&adapter->mfe_lock);
1804
1805                 if (adapter->mfe_dvbdev == NULL)
1806                         adapter->mfe_dvbdev = dvbdev;
1807
1808                 else if (adapter->mfe_dvbdev != dvbdev) {
1809                         struct dvb_device
1810                                 *mfedev = adapter->mfe_dvbdev;
1811                         struct dvb_frontend
1812                                 *mfe = mfedev->priv;
1813                         struct dvb_frontend_private
1814                                 *mfepriv = mfe->frontend_priv;
1815                         int mferetry = (dvb_mfe_wait_time << 1);
1816
1817                         mutex_unlock (&adapter->mfe_lock);
1818                         while (mferetry-- && (mfedev->users != -1 ||
1819                                         mfepriv->thread != NULL)) {
1820                                 if(msleep_interruptible(500)) {
1821                                         if(signal_pending(current))
1822                                                 return -EINTR;
1823                                 }
1824                         }
1825
1826                         mutex_lock (&adapter->mfe_lock);
1827                         if(adapter->mfe_dvbdev != dvbdev) {
1828                                 mfedev = adapter->mfe_dvbdev;
1829                                 mfe = mfedev->priv;
1830                                 mfepriv = mfe->frontend_priv;
1831                                 if (mfedev->users != -1 ||
1832                                                 mfepriv->thread != NULL) {
1833                                         mutex_unlock (&adapter->mfe_lock);
1834                                         return -EBUSY;
1835                                 }
1836                                 adapter->mfe_dvbdev = dvbdev;
1837                         }
1838                 }
1839         }
1840
1841         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1842                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1843                         goto err0;
1844         }
1845
1846         if ((ret = dvb_generic_open (inode, file)) < 0)
1847                 goto err1;
1848
1849         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1850                 /* normal tune mode when opened R/W */
1851                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1852                 fepriv->tone = -1;
1853                 fepriv->voltage = -1;
1854
1855                 ret = dvb_frontend_start (fe);
1856                 if (ret)
1857                         goto err2;
1858
1859                 /*  empty event queue */
1860                 fepriv->events.eventr = fepriv->events.eventw = 0;
1861         }
1862
1863         if (adapter->mfe_shared)
1864                 mutex_unlock (&adapter->mfe_lock);
1865         return ret;
1866
1867 err2:
1868         dvb_generic_release(inode, file);
1869 err1:
1870         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1871                 fe->ops.ts_bus_ctrl(fe, 0);
1872 err0:
1873         if (adapter->mfe_shared)
1874                 mutex_unlock (&adapter->mfe_lock);
1875         return ret;
1876 }
1877
1878 static int dvb_frontend_release(struct inode *inode, struct file *file)
1879 {
1880         struct dvb_device *dvbdev = file->private_data;
1881         struct dvb_frontend *fe = dvbdev->priv;
1882         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1883         int ret;
1884
1885         dprintk ("%s\n", __func__);
1886
1887         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
1888                 fepriv->release_jiffies = jiffies;
1889
1890         ret = dvb_generic_release (inode, file);
1891
1892         if (dvbdev->users == -1) {
1893                 if (fepriv->exit == 1) {
1894                         fops_put(file->f_op);
1895                         file->f_op = NULL;
1896                         wake_up(&dvbdev->wait_queue);
1897                 }
1898                 if (fe->ops.ts_bus_ctrl)
1899                         fe->ops.ts_bus_ctrl(fe, 0);
1900         }
1901
1902         return ret;
1903 }
1904
1905 static const struct file_operations dvb_frontend_fops = {
1906         .owner          = THIS_MODULE,
1907         .ioctl          = dvb_generic_ioctl,
1908         .poll           = dvb_frontend_poll,
1909         .open           = dvb_frontend_open,
1910         .release        = dvb_frontend_release
1911 };
1912
1913 int dvb_register_frontend(struct dvb_adapter* dvb,
1914                           struct dvb_frontend* fe)
1915 {
1916         struct dvb_frontend_private *fepriv;
1917         static const struct dvb_device dvbdev_template = {
1918                 .users = ~0,
1919                 .writers = 1,
1920                 .readers = (~0)-1,
1921                 .fops = &dvb_frontend_fops,
1922                 .kernel_ioctl = dvb_frontend_ioctl
1923         };
1924
1925         dprintk ("%s\n", __func__);
1926
1927         if (mutex_lock_interruptible(&frontend_mutex))
1928                 return -ERESTARTSYS;
1929
1930         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
1931         if (fe->frontend_priv == NULL) {
1932                 mutex_unlock(&frontend_mutex);
1933                 return -ENOMEM;
1934         }
1935         fepriv = fe->frontend_priv;
1936
1937         init_MUTEX (&fepriv->sem);
1938         init_waitqueue_head (&fepriv->wait_queue);
1939         init_waitqueue_head (&fepriv->events.wait_queue);
1940         mutex_init(&fepriv->events.mtx);
1941         fe->dvb = dvb;
1942         fepriv->inversion = INVERSION_OFF;
1943
1944         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
1945                 fe->dvb->num,
1946                 fe->id,
1947                 fe->ops.info.name);
1948
1949         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
1950                              fe, DVB_DEVICE_FRONTEND);
1951
1952         mutex_unlock(&frontend_mutex);
1953         return 0;
1954 }
1955 EXPORT_SYMBOL(dvb_register_frontend);
1956
1957 int dvb_unregister_frontend(struct dvb_frontend* fe)
1958 {
1959         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1960         dprintk ("%s\n", __func__);
1961
1962         mutex_lock(&frontend_mutex);
1963         dvb_frontend_stop (fe);
1964         mutex_unlock(&frontend_mutex);
1965
1966         if (fepriv->dvbdev->users < -1)
1967                 wait_event(fepriv->dvbdev->wait_queue,
1968                                 fepriv->dvbdev->users==-1);
1969
1970         mutex_lock(&frontend_mutex);
1971         dvb_unregister_device (fepriv->dvbdev);
1972
1973         /* fe is invalid now */
1974         kfree(fepriv);
1975         mutex_unlock(&frontend_mutex);
1976         return 0;
1977 }
1978 EXPORT_SYMBOL(dvb_unregister_frontend);
1979
1980 #ifdef CONFIG_MEDIA_ATTACH
1981 void dvb_frontend_detach(struct dvb_frontend* fe)
1982 {
1983         void *ptr;
1984
1985         if (fe->ops.release_sec) {
1986                 fe->ops.release_sec(fe);
1987                 symbol_put_addr(fe->ops.release_sec);
1988         }
1989         if (fe->ops.tuner_ops.release) {
1990                 fe->ops.tuner_ops.release(fe);
1991                 symbol_put_addr(fe->ops.tuner_ops.release);
1992         }
1993         if (fe->ops.analog_ops.release) {
1994                 fe->ops.analog_ops.release(fe);
1995                 symbol_put_addr(fe->ops.analog_ops.release);
1996         }
1997         ptr = (void*)fe->ops.release;
1998         if (ptr) {
1999                 fe->ops.release(fe);
2000                 symbol_put_addr(ptr);
2001         }
2002 }
2003 #else
2004 void dvb_frontend_detach(struct dvb_frontend* fe)
2005 {
2006         if (fe->ops.release_sec)
2007                 fe->ops.release_sec(fe);
2008         if (fe->ops.tuner_ops.release)
2009                 fe->ops.tuner_ops.release(fe);
2010         if (fe->ops.analog_ops.release)
2011                 fe->ops.analog_ops.release(fe);
2012         if (fe->ops.release)
2013                 fe->ops.release(fe);
2014 }
2015 #endif
2016 EXPORT_SYMBOL(dvb_frontend_detach);