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 #define DVB_FE_NO_EXIT  0
  99 #define DVB_FE_NORMAL_EXIT      1
 100 #define DVB_FE_DEVICE_REMOVED   2
 101
 102 static DEFINE_MUTEX(frontend_mutex);
 103
 104 struct dvb_frontend_private {
 105
 106         /* thread/frontend values */
 107         struct dvb_device *dvbdev;
 108         struct dvb_frontend_parameters parameters_in;
 109         struct dvb_frontend_parameters parameters_out;
 110         struct dvb_fe_events events;
 111         struct semaphore sem;
 112         struct list_head list_head;
 113         wait_queue_head_t wait_queue;
 114         struct task_struct *thread;
 115         unsigned long release_jiffies;
 116         unsigned int exit;
 117         unsigned int wakeup;
 118         fe_status_t status;
 119         unsigned long tune_mode_flags;
 120         unsigned int delay;
 121         unsigned int reinitialise;
 122         int tone;
 123         int voltage;
 124
 125         /* swzigzag values */
 126         unsigned int state;
 127         unsigned int bending;
 128         int lnb_drift;
 129         unsigned int inversion;
 130         unsigned int auto_step;
 131         unsigned int auto_sub_step;
 132         unsigned int started_auto_step;
 133         unsigned int min_delay;
 134         unsigned int max_drift;
 135         unsigned int step_size;
 136         int quality;
 137         unsigned int check_wrapped;
 138         enum dvbfe_search algo_status;
 139 };
 140
 141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 142
 143 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 144 {
 145         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 146         struct dvb_fe_events *events = &fepriv->events;
 147         struct dvb_frontend_event *e;
 148         int wp;
 149
 150         dprintk ("%s\n", __func__);
 151
 152         if ((status & FE_HAS_LOCK) && fe->ops.get_frontend)
 153                 fe->ops.get_frontend(fe, &fepriv->parameters_out);
 154
 155         mutex_lock(&events->mtx);
 156
 157         wp = (events->eventw + 1) % MAX_EVENT;
 158         if (wp == events->eventr) {
 159                 events->overflow = 1;
 160                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 161         }
 162
 163         e = &events->events[events->eventw];
 164         e->status = status;
 165         e->parameters = fepriv->parameters_out;
 166
 167         events->eventw = wp;
 168
 169         mutex_unlock(&events->mtx);
 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         mutex_lock(&events->mtx);
 206         *event = events->events[events->eventr];
 207         events->eventr = (events->eventr + 1) % MAX_EVENT;
 208         mutex_unlock(&events->mtx);
 209
 210         return 0;
 211 }
 212
 213 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 214 {
 215         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 216         struct dvb_fe_events *events = &fepriv->events;
 217
 218         mutex_lock(&events->mtx);
 219         events->eventr = events->eventw;
 220         mutex_unlock(&events->mtx);
 221 }
 222
 223 static void dvb_frontend_init(struct dvb_frontend *fe)
 224 {
 225         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 226                  fe->dvb->num,
 227                  fe->id,
 228                  fe->ops.info.name);
 229
 230         if (fe->ops.init)
 231                 fe->ops.init(fe);
 232         if (fe->ops.tuner_ops.init) {
 233                 if (fe->ops.i2c_gate_ctrl)
 234                         fe->ops.i2c_gate_ctrl(fe, 1);
 235                 fe->ops.tuner_ops.init(fe);
 236                 if (fe->ops.i2c_gate_ctrl)
 237                         fe->ops.i2c_gate_ctrl(fe, 0);
 238         }
 239 }
 240
 241 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 242 {
 243         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 244
 245         fepriv->reinitialise = 1;
 246         dvb_frontend_wakeup(fe);
 247 }
 248 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 249
 250 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 251 {
 252         int q2;
 253
 254         dprintk ("%s\n", __func__);
 255
 256         if (locked)
 257                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 258         else
 259                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 260
 261         q2 = fepriv->quality - 128;
 262         q2 *= q2;
 263
 264         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 265 }
 266
 267 /**
 268  * Performs automatic twiddling of frontend parameters.
 269  *
 270  * @param fe The frontend concerned.
 271  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 272  * @returns Number of complete iterations that have been performed.
 273  */
 274 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 275 {
 276         int autoinversion;
 277         int ready = 0;
 278         int fe_set_err = 0;
 279         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 280         int original_inversion = fepriv->parameters_in.inversion;
 281         u32 original_frequency = fepriv->parameters_in.frequency;
 282
 283         /* are we using autoinversion? */
 284         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 285                          (fepriv->parameters_in.inversion == INVERSION_AUTO));
 286
 287         /* setup parameters correctly */
 288         while(!ready) {
 289                 /* calculate the lnb_drift */
 290                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 291
 292                 /* wrap the auto_step if we've exceeded the maximum drift */
 293                 if (fepriv->lnb_drift > fepriv->max_drift) {
 294                         fepriv->auto_step = 0;
 295                         fepriv->auto_sub_step = 0;
 296                         fepriv->lnb_drift = 0;
 297                 }
 298
 299                 /* perform inversion and +/- zigzag */
 300                 switch(fepriv->auto_sub_step) {
 301                 case 0:
 302                         /* try with the current inversion and current drift setting */
 303                         ready = 1;
 304                         break;
 305
 306                 case 1:
 307                         if (!autoinversion) break;
 308
 309                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 310                         ready = 1;
 311                         break;
 312
 313                 case 2:
 314                         if (fepriv->lnb_drift == 0) break;
 315
 316                         fepriv->lnb_drift = -fepriv->lnb_drift;
 317                         ready = 1;
 318                         break;
 319
 320                 case 3:
 321                         if (fepriv->lnb_drift == 0) break;
 322                         if (!autoinversion) break;
 323
 324                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 325                         fepriv->lnb_drift = -fepriv->lnb_drift;
 326                         ready = 1;
 327                         break;
 328
 329                 default:
 330                         fepriv->auto_step++;
 331                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 332                         break;
 333                 }
 334
 335                 if (!ready) fepriv->auto_sub_step++;
 336         }
 337
 338         /* if this attempt would hit where we started, indicate a complete
 339          * iteration has occurred */
 340         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 341             (fepriv->auto_sub_step == 0) && check_wrapped) {
 342                 return 1;
 343         }
 344
 345         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 346                 "auto_sub_step:%i started_auto_step:%i\n",
 347                 __func__, fepriv->lnb_drift, fepriv->inversion,
 348                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 349
 350         /* set the frontend itself */
 351         fepriv->parameters_in.frequency += fepriv->lnb_drift;
 352         if (autoinversion)
 353                 fepriv->parameters_in.inversion = fepriv->inversion;
 354         if (fe->ops.set_frontend)
 355                 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters_in);
 356         fepriv->parameters_out = fepriv->parameters_in;
 357         if (fe_set_err < 0) {
 358                 fepriv->state = FESTATE_ERROR;
 359                 return fe_set_err;
 360         }
 361
 362         fepriv->parameters_in.frequency = original_frequency;
 363         fepriv->parameters_in.inversion = original_inversion;
 364
 365         fepriv->auto_sub_step++;
 366         return 0;
 367 }
 368
 369 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 370 {
 371         fe_status_t s = 0;
 372         int retval = 0;
 373         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 374
 375         /* if we've got no parameters, just keep idling */
 376         if (fepriv->state & FESTATE_IDLE) {
 377                 fepriv->delay = 3*HZ;
 378                 fepriv->quality = 0;
 379                 return;
 380         }
 381
 382         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 383         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 384                 if (fepriv->state & FESTATE_RETUNE) {
 385                         if (fe->ops.set_frontend)
 386                                 retval = fe->ops.set_frontend(fe,
 387                                                         &fepriv->parameters_in);
 388                         fepriv->parameters_out = fepriv->parameters_in;
 389                         if (retval < 0)
 390                                 fepriv->state = FESTATE_ERROR;
 391                         else
 392                                 fepriv->state = FESTATE_TUNED;
 393                 }
 394                 fepriv->delay = 3*HZ;
 395                 fepriv->quality = 0;
 396                 return;
 397         }
 398
 399         /* get the frontend status */
 400         if (fepriv->state & FESTATE_RETUNE) {
 401                 s = 0;
 402         } else {
 403                 if (fe->ops.read_status)
 404                         fe->ops.read_status(fe, &s);
 405                 if (s != fepriv->status) {
 406                         dvb_frontend_add_event(fe, s);
 407                         fepriv->status = s;
 408                 }
 409         }
 410
 411         /* if we're not tuned, and we have a lock, move to the TUNED state */
 412         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 413                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 414                 fepriv->state = FESTATE_TUNED;
 415
 416                 /* if we're tuned, then we have determined the correct inversion */
 417                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 418                     (fepriv->parameters_in.inversion == INVERSION_AUTO)) {
 419                         fepriv->parameters_in.inversion = fepriv->inversion;
 420                 }
 421                 return;
 422         }
 423
 424         /* if we are tuned already, check we're still locked */
 425         if (fepriv->state & FESTATE_TUNED) {
 426                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 427
 428                 /* we're tuned, and the lock is still good... */
 429                 if (s & FE_HAS_LOCK) {
 430                         return;
 431                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 432                         fepriv->state = FESTATE_ZIGZAG_FAST;
 433                         fepriv->started_auto_step = fepriv->auto_step;
 434                         fepriv->check_wrapped = 0;
 435                 }
 436         }
 437
 438         /* don't actually do anything if we're in the LOSTLOCK state,
 439          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 440         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 441             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 442                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 443                 return;
 444         }
 445
 446         /* don't do anything if we're in the DISEQC state, since this
 447          * might be someone with a motorized dish controlled by DISEQC.
 448          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 449         if (fepriv->state & FESTATE_DISEQC) {
 450                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 451                 return;
 452         }
 453
 454         /* if we're in the RETUNE state, set everything up for a brand
 455          * new scan, keeping the current inversion setting, as the next
 456          * tune is _very_ likely to require the same */
 457         if (fepriv->state & FESTATE_RETUNE) {
 458                 fepriv->lnb_drift = 0;
 459                 fepriv->auto_step = 0;
 460                 fepriv->auto_sub_step = 0;
 461                 fepriv->started_auto_step = 0;
 462                 fepriv->check_wrapped = 0;
 463         }
 464
 465         /* fast zigzag. */
 466         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 467                 fepriv->delay = fepriv->min_delay;
 468
 469                 /* perform a tune */
 470                 retval = dvb_frontend_swzigzag_autotune(fe,
 471                                                         fepriv->check_wrapped);
 472                 if (retval < 0) {
 473                         return;
 474                 } else if (retval) {
 475                         /* OK, if we've run out of trials at the fast speed.
 476                          * Drop back to slow for the _next_ attempt */
 477                         fepriv->state = FESTATE_SEARCHING_SLOW;
 478                         fepriv->started_auto_step = fepriv->auto_step;
 479                         return;
 480                 }
 481                 fepriv->check_wrapped = 1;
 482
 483                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 484                  * This ensures we cannot return from an
 485                  * FE_SET_FRONTEND ioctl before the first frontend tune
 486                  * occurs */
 487                 if (fepriv->state & FESTATE_RETUNE) {
 488                         fepriv->state = FESTATE_TUNING_FAST;
 489                 }
 490         }
 491
 492         /* slow zigzag */
 493         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 494                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 495
 496                 /* Note: don't bother checking for wrapping; we stay in this
 497                  * state until we get a lock */
 498                 dvb_frontend_swzigzag_autotune(fe, 0);
 499         }
 500 }
 501
 502 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 503 {
 504         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 505
 506         if (fepriv->exit != DVB_FE_NO_EXIT)
 507                 return 1;
 508
 509         if (fepriv->dvbdev->writers == 1)
 510                 if (time_after(jiffies, fepriv->release_jiffies +
 511                                   dvb_shutdown_timeout * HZ))
 512                         return 1;
 513
 514         return 0;
 515 }
 516
 517 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 518 {
 519         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 520
 521         if (fepriv->wakeup) {
 522                 fepriv->wakeup = 0;
 523                 return 1;
 524         }
 525         return dvb_frontend_is_exiting(fe);
 526 }
 527
 528 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 529 {
 530         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 531
 532         fepriv->wakeup = 1;
 533         wake_up_interruptible(&fepriv->wait_queue);
 534 }
 535
 536 static int dvb_frontend_thread(void *data)
 537 {
 538         struct dvb_frontend *fe = data;
 539         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 540         unsigned long timeout;
 541         fe_status_t s;
 542         enum dvbfe_algo algo;
 543
 544         struct dvb_frontend_parameters *params;
 545
 546         dprintk("%s\n", __func__);
 547
 548         fepriv->check_wrapped = 0;
 549         fepriv->quality = 0;
 550         fepriv->delay = 3*HZ;
 551         fepriv->status = 0;
 552         fepriv->wakeup = 0;
 553         fepriv->reinitialise = 0;
 554
 555         dvb_frontend_init(fe);
 556
 557         set_freezable();
 558         while (1) {
 559                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 560 restart:
 561                 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
 562                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 563                                 || freezing(current),
 564                         fepriv->delay);
 565
 566                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 567                         /* got signal or quitting */
 568                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 569                         break;
 570                 }
 571
 572                 if (try_to_freeze())
 573                         goto restart;
 574
 575                 if (down_interruptible(&fepriv->sem))
 576                         break;
 577
 578                 if (fepriv->reinitialise) {
 579                         dvb_frontend_init(fe);
 580                         if (fe->ops.set_tone && fepriv->tone != -1)
 581                                 fe->ops.set_tone(fe, fepriv->tone);
 582                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 583                                 fe->ops.set_voltage(fe, fepriv->voltage);
 584                         fepriv->reinitialise = 0;
 585                 }
 586
 587                 /* do an iteration of the tuning loop */
 588                 if (fe->ops.get_frontend_algo) {
 589                         algo = fe->ops.get_frontend_algo(fe);
 590                         switch (algo) {
 591                         case DVBFE_ALGO_HW:
 592                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 593                                 params = NULL; /* have we been asked to RETUNE ? */
 594
 595                                 if (fepriv->state & FESTATE_RETUNE) {
 596                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 597                                         params = &fepriv->parameters_in;
 598                                         fepriv->state = FESTATE_TUNED;
 599                                 }
 600
 601                                 if (fe->ops.tune)
 602                                         fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
 603                                 if (params)
 604                                         fepriv->parameters_out = *params;
 605
 606                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 607                                         dprintk("%s: state changed, adding current state\n", __func__);
 608                                         dvb_frontend_add_event(fe, s);
 609                                         fepriv->status = s;
 610                                 }
 611                                 break;
 612                         case DVBFE_ALGO_SW:
 613                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 614                                 dvb_frontend_swzigzag(fe);
 615                                 break;
 616                         case DVBFE_ALGO_CUSTOM:
 617                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 618                                 if (fepriv->state & FESTATE_RETUNE) {
 619                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 620                                         fepriv->state = FESTATE_TUNED;
 621                                 }
 622                                 /* Case where we are going to search for a carrier
 623                                  * User asked us to retune again for some reason, possibly
 624                                  * requesting a search with a new set of parameters
 625                                  */
 626                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 627                                         if (fe->ops.search) {
 628                                                 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters_in);
 629                                                 /* We did do a search as was requested, the flags are
 630                                                  * now unset as well and has the flags wrt to search.
 631                                                  */
 632                                         } else {
 633                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 634                                         }
 635                                 }
 636                                 /* Track the carrier if the search was successful */
 637                                 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
 638                                         if (fe->ops.track)
 639                                                 fe->ops.track(fe, &fepriv->parameters_in);
 640                                 } else {
 641                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 642                                         fepriv->delay = HZ / 2;
 643                                 }
 644                                 fepriv->parameters_out = fepriv->parameters_in;
 645                                 fe->ops.read_status(fe, &s);
 646                                 if (s != fepriv->status) {
 647                                         dvb_frontend_add_event(fe, s); /* update event list */
 648                                         fepriv->status = s;
 649                                         if (!(s & FE_HAS_LOCK)) {
 650                                                 fepriv->delay = HZ / 10;
 651                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 652                                         } else {
 653                                                 fepriv->delay = 60 * HZ;
 654                                         }
 655                                 }
 656                                 break;
 657                         default:
 658                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 659                                 break;
 660                         }
 661                 } else {
 662                         dvb_frontend_swzigzag(fe);
 663                 }
 664         }
 665
 666         if (dvb_powerdown_on_sleep) {
 667                 if (fe->ops.set_voltage)
 668                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 669                 if (fe->ops.tuner_ops.sleep) {
 670                         if (fe->ops.i2c_gate_ctrl)
 671                                 fe->ops.i2c_gate_ctrl(fe, 1);
 672                         fe->ops.tuner_ops.sleep(fe);
 673                         if (fe->ops.i2c_gate_ctrl)
 674                                 fe->ops.i2c_gate_ctrl(fe, 0);
 675                 }
 676                 if (fe->ops.sleep)
 677                         fe->ops.sleep(fe);
 678         }
 679
 680         fepriv->thread = NULL;
 681         if (kthread_should_stop())
 682                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 683         else
 684                 fepriv->exit = DVB_FE_NO_EXIT;
 685         mb();
 686
 687         dvb_frontend_wakeup(fe);
 688         return 0;
 689 }
 690
 691 static void dvb_frontend_stop(struct dvb_frontend *fe)
 692 {
 693         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 694
 695         dprintk ("%s\n", __func__);
 696
 697         fepriv->exit = DVB_FE_NORMAL_EXIT;
 698         mb();
 699
 700         if (!fepriv->thread)
 701                 return;
 702
 703         kthread_stop(fepriv->thread);
 704
 705         sema_init(&fepriv->sem, 1);
 706         fepriv->state = FESTATE_IDLE;
 707
 708         /* paranoia check in case a signal arrived */
 709         if (fepriv->thread)
 710                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 711                                 fepriv->thread);
 712 }
 713
 714 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 715 {
 716         return ((curtime.tv_usec < lasttime.tv_usec) ?
 717                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 718                 curtime.tv_usec - lasttime.tv_usec);
 719 }
 720 EXPORT_SYMBOL(timeval_usec_diff);
 721
 722 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 723 {
 724         curtime->tv_usec += add_usec;
 725         if (curtime->tv_usec >= 1000000) {
 726                 curtime->tv_usec -= 1000000;
 727                 curtime->tv_sec++;
 728         }
 729 }
 730
 731 /*
 732  * Sleep until gettimeofday() > waketime + add_usec
 733  * This needs to be as precise as possible, but as the delay is
 734  * usually between 2ms and 32ms, it is done using a scheduled msleep
 735  * followed by usleep (normally a busy-wait loop) for the remainder
 736  */
 737 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 738 {
 739         struct timeval lasttime;
 740         s32 delta, newdelta;
 741
 742         timeval_usec_add(waketime, add_usec);
 743
 744         do_gettimeofday(&lasttime);
 745         delta = timeval_usec_diff(lasttime, *waketime);
 746         if (delta > 2500) {
 747                 msleep((delta - 1500) / 1000);
 748                 do_gettimeofday(&lasttime);
 749                 newdelta = timeval_usec_diff(lasttime, *waketime);
 750                 delta = (newdelta > delta) ? 0 : newdelta;
 751         }
 752         if (delta > 0)
 753                 udelay(delta);
 754 }
 755 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 756
 757 static int dvb_frontend_start(struct dvb_frontend *fe)
 758 {
 759         int ret;
 760         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 761         struct task_struct *fe_thread;
 762
 763         dprintk ("%s\n", __func__);
 764
 765         if (fepriv->thread) {
 766                 if (fepriv->exit == DVB_FE_NO_EXIT)
 767                         return 0;
 768                 else
 769                         dvb_frontend_stop (fe);
 770         }
 771
 772         if (signal_pending(current))
 773                 return -EINTR;
 774         if (down_interruptible (&fepriv->sem))
 775                 return -EINTR;
 776
 777         fepriv->state = FESTATE_IDLE;
 778         fepriv->exit = DVB_FE_NO_EXIT;
 779         fepriv->thread = NULL;
 780         mb();
 781
 782         fe_thread = kthread_run(dvb_frontend_thread, fe,
 783                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 784         if (IS_ERR(fe_thread)) {
 785                 ret = PTR_ERR(fe_thread);
 786                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 787                 up(&fepriv->sem);
 788                 return ret;
 789         }
 790         fepriv->thread = fe_thread;
 791         return 0;
 792 }
 793
 794 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 795                                         u32 *freq_min, u32 *freq_max)
 796 {
 797         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 798
 799         if (fe->ops.info.frequency_max == 0)
 800                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 801         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 802                 *freq_max = fe->ops.info.frequency_max;
 803         else
 804                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 805
 806         if (*freq_min == 0 || *freq_max == 0)
 807                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 808                        fe->dvb->num,fe->id);
 809 }
 810
 811 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 812                                 struct dvb_frontend_parameters *parms)
 813 {
 814         u32 freq_min;
 815         u32 freq_max;
 816
 817         /* range check: frequency */
 818         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 819         if ((freq_min && parms->frequency < freq_min) ||
 820             (freq_max && parms->frequency > freq_max)) {
 821                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 822                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 823                 return -EINVAL;
 824         }
 825
 826         /* range check: symbol rate */
 827         if (fe->ops.info.type == FE_QPSK) {
 828                 if ((fe->ops.info.symbol_rate_min &&
 829                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 830                     (fe->ops.info.symbol_rate_max &&
 831                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 832                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 833                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 834                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 835                         return -EINVAL;
 836                 }
 837
 838         } else if (fe->ops.info.type == FE_QAM) {
 839                 if ((fe->ops.info.symbol_rate_min &&
 840                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 841                     (fe->ops.info.symbol_rate_max &&
 842                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 843                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 844                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 845                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 846                         return -EINVAL;
 847                 }
 848         }
 849
 850         /* check for supported modulation */
 851         if (fe->ops.info.type == FE_QAM &&
 852             (parms->u.qam.modulation > QAM_AUTO ||
 853              !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
 854                 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
 855                        fe->dvb->num, fe->id, parms->u.qam.modulation);
 856                         return -EINVAL;
 857         }
 858
 859         return 0;
 860 }
 861
 862 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 863 {
 864         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 865         int i;
 866
 867         memset(c, 0, sizeof(struct dtv_frontend_properties));
 868
 869         c->state = DTV_CLEAR;
 870         c->delivery_system = SYS_UNDEFINED;
 871         c->inversion = INVERSION_AUTO;
 872         c->fec_inner = FEC_AUTO;
 873         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 874         c->bandwidth_hz = BANDWIDTH_AUTO;
 875         c->guard_interval = GUARD_INTERVAL_AUTO;
 876         c->hierarchy = HIERARCHY_AUTO;
 877         c->symbol_rate = QAM_AUTO;
 878         c->code_rate_HP = FEC_AUTO;
 879         c->code_rate_LP = FEC_AUTO;
 880
 881         c->isdbt_partial_reception = -1;
 882         c->isdbt_sb_mode = -1;
 883         c->isdbt_sb_subchannel = -1;
 884         c->isdbt_sb_segment_idx = -1;
 885         c->isdbt_sb_segment_count = -1;
 886         c->isdbt_layer_enabled = 0x7;
 887         for (i = 0; i < 3; i++) {
 888                 c->layer[i].fec = FEC_AUTO;
 889                 c->layer[i].modulation = QAM_AUTO;
 890                 c->layer[i].interleaving = -1;
 891                 c->layer[i].segment_count = -1;
 892         }
 893
 894         return 0;
 895 }
 896
 897 #define _DTV_CMD(n, s, b) \
 898 [n] = { \
 899         .name = #n, \
 900         .cmd  = n, \
 901         .set  = s,\
 902         .buffer = b \
 903 }
 904
 905 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 906         _DTV_CMD(DTV_TUNE, 1, 0),
 907         _DTV_CMD(DTV_CLEAR, 1, 0),
 908
 909         /* Set */
 910         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 911         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 912         _DTV_CMD(DTV_MODULATION, 1, 0),
 913         _DTV_CMD(DTV_INVERSION, 1, 0),
 914         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 915         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 916         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 917         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 918         _DTV_CMD(DTV_TONE, 1, 0),
 919         _DTV_CMD(DTV_PILOT, 1, 0),
 920         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 921         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 922         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 923         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 924         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 925         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 926         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
 927
 928         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
 929         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
 930         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
 931         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
 932         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
 933         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
 934         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
 935         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
 936         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
 937         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
 938         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
 939         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
 940         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
 941         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
 942         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
 943         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
 944         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
 945         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
 946
 947         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
 948         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
 949         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
 950         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
 951         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
 952         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
 953         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
 954         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
 955         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
 956         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
 957         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
 958         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
 959         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
 960         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
 961         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
 962         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
 963         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
 964         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
 965
 966         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
 967         _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
 968
 969         /* Get */
 970         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
 971         _DTV_CMD(DTV_API_VERSION, 0, 0),
 972         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
 973         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
 974         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
 975         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
 976         _DTV_CMD(DTV_HIERARCHY, 0, 0),
 977 };
 978
 979 static void dtv_property_dump(struct dtv_property *tvp)
 980 {
 981         int i;
 982
 983         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 984                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 985                         __func__, tvp->cmd);
 986                 return;
 987         }
 988
 989         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 990                 ,__func__
 991                 ,tvp->cmd
 992                 ,dtv_cmds[ tvp->cmd ].name);
 993
 994         if(dtv_cmds[ tvp->cmd ].buffer) {
 995
 996                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 997                         ,__func__
 998                         ,tvp->u.buffer.len);
 999
1000                 for(i = 0; i < tvp->u.buffer.len; i++)
1001                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1002                                 ,__func__
1003                                 ,i
1004                                 ,tvp->u.buffer.data[i]);
1005
1006         } else
1007                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1008 }
1009
1010 static int is_legacy_delivery_system(fe_delivery_system_t s)
1011 {
1012         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1013            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1014            (s == SYS_ATSC))
1015                 return 1;
1016
1017         return 0;
1018 }
1019
1020 /* Initialize the cache with some default values derived from the
1021  * legacy frontend_info structure.
1022  */
1023 static void dtv_property_cache_init(struct dvb_frontend *fe,
1024                                     struct dtv_frontend_properties *c)
1025 {
1026         switch (fe->ops.info.type) {
1027         case FE_QPSK:
1028                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1029                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1030                 c->delivery_system = SYS_DVBS;
1031                 break;
1032         case FE_QAM:
1033                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1034                 break;
1035         case FE_OFDM:
1036                 c->delivery_system = SYS_DVBT;
1037                 break;
1038         case FE_ATSC:
1039                 break;
1040         }
1041 }
1042
1043 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1044  * drivers can use a single set_frontend tuning function, regardless of whether
1045  * it's being used for the legacy or new API, reducing code and complexity.
1046  */
1047 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1048                                     struct dtv_frontend_properties *c,
1049                                     const struct dvb_frontend_parameters *p)
1050 {
1051         c->frequency = p->frequency;
1052         c->inversion = p->inversion;
1053
1054         switch (fe->ops.info.type) {
1055         case FE_QPSK:
1056                 c->symbol_rate = p->u.qpsk.symbol_rate;
1057                 c->fec_inner = p->u.qpsk.fec_inner;
1058                 break;
1059         case FE_QAM:
1060                 c->symbol_rate = p->u.qam.symbol_rate;
1061                 c->fec_inner = p->u.qam.fec_inner;
1062                 c->modulation = p->u.qam.modulation;
1063                 break;
1064         case FE_OFDM:
1065                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1066                         c->bandwidth_hz = 6000000;
1067                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1068                         c->bandwidth_hz = 7000000;
1069                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1070                         c->bandwidth_hz = 8000000;
1071                 else
1072                         /* Including BANDWIDTH_AUTO */
1073                         c->bandwidth_hz = 0;
1074                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1075                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1076                 c->modulation = p->u.ofdm.constellation;
1077                 c->transmission_mode = p->u.ofdm.transmission_mode;
1078                 c->guard_interval = p->u.ofdm.guard_interval;
1079                 c->hierarchy = p->u.ofdm.hierarchy_information;
1080                 break;
1081         case FE_ATSC:
1082                 c->modulation = p->u.vsb.modulation;
1083                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1084                         c->delivery_system = SYS_ATSC;
1085                 else
1086                         c->delivery_system = SYS_DVBC_ANNEX_B;
1087                 break;
1088         }
1089 }
1090
1091 /* Ensure the cached values are set correctly in the frontend
1092  * legacy tuning structures, for the advanced tuning API.
1093  */
1094 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1095 {
1096         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1097         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1098         struct dvb_frontend_parameters *p = &fepriv->parameters_in;
1099
1100         p->frequency = c->frequency;
1101         p->inversion = c->inversion;
1102
1103         switch (fe->ops.info.type) {
1104         case FE_QPSK:
1105                 dprintk("%s() Preparing QPSK req\n", __func__);
1106                 p->u.qpsk.symbol_rate = c->symbol_rate;
1107                 p->u.qpsk.fec_inner = c->fec_inner;
1108                 break;
1109         case FE_QAM:
1110                 dprintk("%s() Preparing QAM req\n", __func__);
1111                 p->u.qam.symbol_rate = c->symbol_rate;
1112                 p->u.qam.fec_inner = c->fec_inner;
1113                 p->u.qam.modulation = c->modulation;
1114                 break;
1115         case FE_OFDM:
1116                 dprintk("%s() Preparing OFDM req\n", __func__);
1117                 if (c->bandwidth_hz == 6000000)
1118                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1119                 else if (c->bandwidth_hz == 7000000)
1120                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1121                 else if (c->bandwidth_hz == 8000000)
1122                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1123                 else
1124                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1125                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1126                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1127                 p->u.ofdm.constellation = c->modulation;
1128                 p->u.ofdm.transmission_mode = c->transmission_mode;
1129                 p->u.ofdm.guard_interval = c->guard_interval;
1130                 p->u.ofdm.hierarchy_information = c->hierarchy;
1131                 break;
1132         case FE_ATSC:
1133                 dprintk("%s() Preparing VSB req\n", __func__);
1134                 p->u.vsb.modulation = c->modulation;
1135                 break;
1136         }
1137 }
1138
1139 /* Ensure the cached values are set correctly in the frontend
1140  * legacy tuning structures, for the legacy tuning API.
1141  */
1142 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1143 {
1144         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1145         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1146         struct dvb_frontend_parameters *p = &fepriv->parameters_in;
1147
1148         p->frequency = c->frequency;
1149         p->inversion = c->inversion;
1150
1151         if (c->delivery_system == SYS_DSS ||
1152             c->delivery_system == SYS_DVBS ||
1153             c->delivery_system == SYS_DVBS2 ||
1154             c->delivery_system == SYS_ISDBS ||
1155             c->delivery_system == SYS_TURBO) {
1156                 p->u.qpsk.symbol_rate = c->symbol_rate;
1157                 p->u.qpsk.fec_inner = c->fec_inner;
1158         }
1159
1160         /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1161         if ((c->delivery_system == SYS_ISDBT) ||
1162             (c->delivery_system == SYS_DVBT2)) {
1163                 p->u.ofdm.constellation = QAM_AUTO;
1164                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1165                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1166                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1167                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1168                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1169                 if (c->bandwidth_hz == 8000000)
1170                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1171                 else if (c->bandwidth_hz == 7000000)
1172                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1173                 else if (c->bandwidth_hz == 6000000)
1174                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1175                 else
1176                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1177         }
1178 }
1179
1180 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1181 {
1182         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1183
1184         /* For legacy delivery systems we don't need the delivery_system to
1185          * be specified, but we populate the older structures from the cache
1186          * so we can call set_frontend on older drivers.
1187          */
1188         if(is_legacy_delivery_system(c->delivery_system)) {
1189
1190                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1191                 dtv_property_legacy_params_sync(fe);
1192
1193         } else {
1194                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1195
1196                 /* For advanced delivery systems / modulation types ...
1197                  * we seed the lecacy dvb_frontend_parameters structure
1198                  * so that the sanity checking code later in the IOCTL processing
1199                  * can validate our basic frequency ranges, symbolrates, modulation
1200                  * etc.
1201                  */
1202                 dtv_property_adv_params_sync(fe);
1203         }
1204 }
1205
1206 static int dvb_frontend_ioctl_legacy(struct file *file,
1207                         unsigned int cmd, void *parg);
1208 static int dvb_frontend_ioctl_properties(struct file *file,
1209                         unsigned int cmd, void *parg);
1210
1211 static int dtv_property_process_get(struct dvb_frontend *fe,
1212                                     struct dtv_property *tvp,
1213                                     struct file *file)
1214 {
1215         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1216         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1217         struct dtv_frontend_properties cdetected;
1218         int r;
1219
1220         /*
1221          * If the driver implements a get_frontend function, then convert
1222          * detected parameters to S2API properties.
1223          */
1224         if (fe->ops.get_frontend) {
1225                 cdetected = *c;
1226                 dtv_property_cache_sync(fe, &cdetected, &fepriv->parameters_out);
1227                 c = &cdetected;
1228         }
1229
1230         switch(tvp->cmd) {
1231         case DTV_FREQUENCY:
1232                 tvp->u.data = c->frequency;
1233                 break;
1234         case DTV_MODULATION:
1235                 tvp->u.data = c->modulation;
1236                 break;
1237         case DTV_BANDWIDTH_HZ:
1238                 tvp->u.data = c->bandwidth_hz;
1239                 break;
1240         case DTV_INVERSION:
1241                 tvp->u.data = c->inversion;
1242                 break;
1243         case DTV_SYMBOL_RATE:
1244                 tvp->u.data = c->symbol_rate;
1245                 break;
1246         case DTV_INNER_FEC:
1247                 tvp->u.data = c->fec_inner;
1248                 break;
1249         case DTV_PILOT:
1250                 tvp->u.data = c->pilot;
1251                 break;
1252         case DTV_ROLLOFF:
1253                 tvp->u.data = c->rolloff;
1254                 break;
1255         case DTV_DELIVERY_SYSTEM:
1256                 tvp->u.data = c->delivery_system;
1257                 break;
1258         case DTV_VOLTAGE:
1259                 tvp->u.data = c->voltage;
1260                 break;
1261         case DTV_TONE:
1262                 tvp->u.data = c->sectone;
1263                 break;
1264         case DTV_API_VERSION:
1265                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1266                 break;
1267         case DTV_CODE_RATE_HP:
1268                 tvp->u.data = c->code_rate_HP;
1269                 break;
1270         case DTV_CODE_RATE_LP:
1271                 tvp->u.data = c->code_rate_LP;
1272                 break;
1273         case DTV_GUARD_INTERVAL:
1274                 tvp->u.data = c->guard_interval;
1275                 break;
1276         case DTV_TRANSMISSION_MODE:
1277                 tvp->u.data = c->transmission_mode;
1278                 break;
1279         case DTV_HIERARCHY:
1280                 tvp->u.data = c->hierarchy;
1281                 break;
1282
1283         /* ISDB-T Support here */
1284         case DTV_ISDBT_PARTIAL_RECEPTION:
1285                 tvp->u.data = c->isdbt_partial_reception;
1286                 break;
1287         case DTV_ISDBT_SOUND_BROADCASTING:
1288                 tvp->u.data = c->isdbt_sb_mode;
1289                 break;
1290         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1291                 tvp->u.data = c->isdbt_sb_subchannel;
1292                 break;
1293         case DTV_ISDBT_SB_SEGMENT_IDX:
1294                 tvp->u.data = c->isdbt_sb_segment_idx;
1295                 break;
1296         case DTV_ISDBT_SB_SEGMENT_COUNT:
1297                 tvp->u.data = c->isdbt_sb_segment_count;
1298                 break;
1299         case DTV_ISDBT_LAYER_ENABLED:
1300                 tvp->u.data = c->isdbt_layer_enabled;
1301                 break;
1302         case DTV_ISDBT_LAYERA_FEC:
1303                 tvp->u.data = c->layer[0].fec;
1304                 break;
1305         case DTV_ISDBT_LAYERA_MODULATION:
1306                 tvp->u.data = c->layer[0].modulation;
1307                 break;
1308         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1309                 tvp->u.data = c->layer[0].segment_count;
1310                 break;
1311         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1312                 tvp->u.data = c->layer[0].interleaving;
1313                 break;
1314         case DTV_ISDBT_LAYERB_FEC:
1315                 tvp->u.data = c->layer[1].fec;
1316                 break;
1317         case DTV_ISDBT_LAYERB_MODULATION:
1318                 tvp->u.data = c->layer[1].modulation;
1319                 break;
1320         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1321                 tvp->u.data = c->layer[1].segment_count;
1322                 break;
1323         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1324                 tvp->u.data = c->layer[1].interleaving;
1325                 break;
1326         case DTV_ISDBT_LAYERC_FEC:
1327                 tvp->u.data = c->layer[2].fec;
1328                 break;
1329         case DTV_ISDBT_LAYERC_MODULATION:
1330                 tvp->u.data = c->layer[2].modulation;
1331                 break;
1332         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1333                 tvp->u.data = c->layer[2].segment_count;
1334                 break;
1335         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1336                 tvp->u.data = c->layer[2].interleaving;
1337                 break;
1338         case DTV_ISDBS_TS_ID:
1339                 tvp->u.data = c->isdbs_ts_id;
1340                 break;
1341         case DTV_DVBT2_PLP_ID:
1342                 tvp->u.data = c->dvbt2_plp_id;
1343                 break;
1344         default:
1345                 return -EINVAL;
1346         }
1347
1348         /* Allow the frontend to override outgoing properties */
1349         if (fe->ops.get_property) {
1350                 r = fe->ops.get_property(fe, tvp);
1351                 if (r < 0)
1352                         return r;
1353         }
1354
1355         dtv_property_dump(tvp);
1356
1357         return 0;
1358 }
1359
1360 static int dtv_property_process_set(struct dvb_frontend *fe,
1361                                     struct dtv_property *tvp,
1362                                     struct file *file)
1363 {
1364         int r = 0;
1365         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1366         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1367         dtv_property_dump(tvp);
1368
1369         /* Allow the frontend to validate incoming properties */
1370         if (fe->ops.set_property) {
1371                 r = fe->ops.set_property(fe, tvp);
1372                 if (r < 0)
1373                         return r;
1374         }
1375
1376         switch(tvp->cmd) {
1377         case DTV_CLEAR:
1378                 /* Reset a cache of data specific to the frontend here. This does
1379                  * not effect hardware.
1380                  */
1381                 dvb_frontend_clear_cache(fe);
1382                 dprintk("%s() Flushing property cache\n", __func__);
1383                 break;
1384         case DTV_TUNE:
1385                 /* interpret the cache of data, build either a traditional frontend
1386                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1387                  * ioctl.
1388                  */
1389                 c->state = tvp->cmd;
1390                 dprintk("%s() Finalised property cache\n", __func__);
1391                 dtv_property_cache_submit(fe);
1392
1393                 r = dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND,
1394                         &fepriv->parameters_in);
1395                 break;
1396         case DTV_FREQUENCY:
1397                 c->frequency = tvp->u.data;
1398                 break;
1399         case DTV_MODULATION:
1400                 c->modulation = tvp->u.data;
1401                 break;
1402         case DTV_BANDWIDTH_HZ:
1403                 c->bandwidth_hz = tvp->u.data;
1404                 break;
1405         case DTV_INVERSION:
1406                 c->inversion = tvp->u.data;
1407                 break;
1408         case DTV_SYMBOL_RATE:
1409                 c->symbol_rate = tvp->u.data;
1410                 break;
1411         case DTV_INNER_FEC:
1412                 c->fec_inner = tvp->u.data;
1413                 break;
1414         case DTV_PILOT:
1415                 c->pilot = tvp->u.data;
1416                 break;
1417         case DTV_ROLLOFF:
1418                 c->rolloff = tvp->u.data;
1419                 break;
1420         case DTV_DELIVERY_SYSTEM:
1421                 c->delivery_system = tvp->u.data;
1422                 break;
1423         case DTV_VOLTAGE:
1424                 c->voltage = tvp->u.data;
1425                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1426                         (void *)c->voltage);
1427                 break;
1428         case DTV_TONE:
1429                 c->sectone = tvp->u.data;
1430                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1431                         (void *)c->sectone);
1432                 break;
1433         case DTV_CODE_RATE_HP:
1434                 c->code_rate_HP = tvp->u.data;
1435                 break;
1436         case DTV_CODE_RATE_LP:
1437                 c->code_rate_LP = tvp->u.data;
1438                 break;
1439         case DTV_GUARD_INTERVAL:
1440                 c->guard_interval = tvp->u.data;
1441                 break;
1442         case DTV_TRANSMISSION_MODE:
1443                 c->transmission_mode = tvp->u.data;
1444                 break;
1445         case DTV_HIERARCHY:
1446                 c->hierarchy = tvp->u.data;
1447                 break;
1448
1449         /* ISDB-T Support here */
1450         case DTV_ISDBT_PARTIAL_RECEPTION:
1451                 c->isdbt_partial_reception = tvp->u.data;
1452                 break;
1453         case DTV_ISDBT_SOUND_BROADCASTING:
1454                 c->isdbt_sb_mode = tvp->u.data;
1455                 break;
1456         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1457                 c->isdbt_sb_subchannel = tvp->u.data;
1458                 break;
1459         case DTV_ISDBT_SB_SEGMENT_IDX:
1460                 c->isdbt_sb_segment_idx = tvp->u.data;
1461                 break;
1462         case DTV_ISDBT_SB_SEGMENT_COUNT:
1463                 c->isdbt_sb_segment_count = tvp->u.data;
1464                 break;
1465         case DTV_ISDBT_LAYER_ENABLED:
1466                 c->isdbt_layer_enabled = tvp->u.data;
1467                 break;
1468         case DTV_ISDBT_LAYERA_FEC:
1469                 c->layer[0].fec = tvp->u.data;
1470                 break;
1471         case DTV_ISDBT_LAYERA_MODULATION:
1472                 c->layer[0].modulation = tvp->u.data;
1473                 break;
1474         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1475                 c->layer[0].segment_count = tvp->u.data;
1476                 break;
1477         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1478                 c->layer[0].interleaving = tvp->u.data;
1479                 break;
1480         case DTV_ISDBT_LAYERB_FEC:
1481                 c->layer[1].fec = tvp->u.data;
1482                 break;
1483         case DTV_ISDBT_LAYERB_MODULATION:
1484                 c->layer[1].modulation = tvp->u.data;
1485                 break;
1486         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1487                 c->layer[1].segment_count = tvp->u.data;
1488                 break;
1489         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1490                 c->layer[1].interleaving = tvp->u.data;
1491                 break;
1492         case DTV_ISDBT_LAYERC_FEC:
1493                 c->layer[2].fec = tvp->u.data;
1494                 break;
1495         case DTV_ISDBT_LAYERC_MODULATION:
1496                 c->layer[2].modulation = tvp->u.data;
1497                 break;
1498         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1499                 c->layer[2].segment_count = tvp->u.data;
1500                 break;
1501         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1502                 c->layer[2].interleaving = tvp->u.data;
1503                 break;
1504         case DTV_ISDBS_TS_ID:
1505                 c->isdbs_ts_id = tvp->u.data;
1506                 break;
1507         case DTV_DVBT2_PLP_ID:
1508                 c->dvbt2_plp_id = tvp->u.data;
1509                 break;
1510         default:
1511                 return -EINVAL;
1512         }
1513
1514         return r;
1515 }
1516
1517 static int dvb_frontend_ioctl(struct file *file,
1518                         unsigned int cmd, void *parg)
1519 {
1520         struct dvb_device *dvbdev = file->private_data;
1521         struct dvb_frontend *fe = dvbdev->priv;
1522         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1523         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1524         int err = -EOPNOTSUPP;
1525
1526         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1527
1528         if (fepriv->exit != DVB_FE_NO_EXIT)
1529                 return -ENODEV;
1530
1531         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1532             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1533              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1534                 return -EPERM;
1535
1536         if (down_interruptible (&fepriv->sem))
1537                 return -ERESTARTSYS;
1538
1539         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1540                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1541         else {
1542                 c->state = DTV_UNDEFINED;
1543                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1544         }
1545
1546         up(&fepriv->sem);
1547         return err;
1548 }
1549
1550 static int dvb_frontend_ioctl_properties(struct file *file,
1551                         unsigned int cmd, void *parg)
1552 {
1553         struct dvb_device *dvbdev = file->private_data;
1554         struct dvb_frontend *fe = dvbdev->priv;
1555         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1556         int err = 0;
1557
1558         struct dtv_properties *tvps = NULL;
1559         struct dtv_property *tvp = NULL;
1560         int i;
1561
1562         dprintk("%s\n", __func__);
1563
1564         if(cmd == FE_SET_PROPERTY) {
1565                 tvps = (struct dtv_properties __user *)parg;
1566
1567                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1568                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1569
1570                 /* Put an arbitrary limit on the number of messages that can
1571                  * be sent at once */
1572                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1573                         return -EINVAL;
1574
1575                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1576                 if (!tvp) {
1577                         err = -ENOMEM;
1578                         goto out;
1579                 }
1580
1581                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1582                         err = -EFAULT;
1583                         goto out;
1584                 }
1585
1586                 for (i = 0; i < tvps->num; i++) {
1587                         err = dtv_property_process_set(fe, tvp + i, file);
1588                         if (err < 0)
1589                                 goto out;
1590                         (tvp + i)->result = err;
1591                 }
1592
1593                 if (c->state == DTV_TUNE)
1594                         dprintk("%s() Property cache is full, tuning\n", __func__);
1595
1596         } else
1597         if(cmd == FE_GET_PROPERTY) {
1598
1599                 tvps = (struct dtv_properties __user *)parg;
1600
1601                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1602                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1603
1604                 /* Put an arbitrary limit on the number of messages that can
1605                  * be sent at once */
1606                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1607                         return -EINVAL;
1608
1609                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1610                 if (!tvp) {
1611                         err = -ENOMEM;
1612                         goto out;
1613                 }
1614
1615                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1616                         err = -EFAULT;
1617                         goto out;
1618                 }
1619
1620                 for (i = 0; i < tvps->num; i++) {
1621                         err = dtv_property_process_get(fe, tvp + i, file);
1622                         if (err < 0)
1623                                 goto out;
1624                         (tvp + i)->result = err;
1625                 }
1626
1627                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1628                         err = -EFAULT;
1629                         goto out;
1630                 }
1631
1632         } else
1633                 err = -EOPNOTSUPP;
1634
1635 out:
1636         kfree(tvp);
1637         return err;
1638 }
1639
1640 static int dvb_frontend_ioctl_legacy(struct file *file,
1641                         unsigned int cmd, void *parg)
1642 {
1643         struct dvb_device *dvbdev = file->private_data;
1644         struct dvb_frontend *fe = dvbdev->priv;
1645         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1646         int cb_err, err = -EOPNOTSUPP;
1647
1648         if (fe->dvb->fe_ioctl_override) {
1649                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1650                                                     DVB_FE_IOCTL_PRE);
1651                 if (cb_err < 0)
1652                         return cb_err;
1653                 if (cb_err > 0)
1654                         return 0;
1655                 /* fe_ioctl_override returning 0 allows
1656                  * dvb-core to continue handling the ioctl */
1657         }
1658
1659         switch (cmd) {
1660         case FE_GET_INFO: {
1661                 struct dvb_frontend_info* info = parg;
1662                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1663                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1664
1665                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1666                  * do it, it is done for it. */
1667                 info->caps |= FE_CAN_INVERSION_AUTO;
1668                 err = 0;
1669                 break;
1670         }
1671
1672         case FE_READ_STATUS: {
1673                 fe_status_t* status = parg;
1674
1675                 /* if retune was requested but hasn't occurred yet, prevent
1676                  * that user get signal state from previous tuning */
1677                 if (fepriv->state == FESTATE_RETUNE ||
1678                     fepriv->state == FESTATE_ERROR) {
1679                         err=0;
1680                         *status = 0;
1681                         break;
1682                 }
1683
1684                 if (fe->ops.read_status)
1685                         err = fe->ops.read_status(fe, status);
1686                 break;
1687         }
1688         case FE_READ_BER:
1689                 if (fe->ops.read_ber)
1690                         err = fe->ops.read_ber(fe, (__u32*) parg);
1691                 break;
1692
1693         case FE_READ_SIGNAL_STRENGTH:
1694                 if (fe->ops.read_signal_strength)
1695                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1696                 break;
1697
1698         case FE_READ_SNR:
1699                 if (fe->ops.read_snr)
1700                         err = fe->ops.read_snr(fe, (__u16*) parg);
1701                 break;
1702
1703         case FE_READ_UNCORRECTED_BLOCKS:
1704                 if (fe->ops.read_ucblocks)
1705                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1706                 break;
1707
1708
1709         case FE_DISEQC_RESET_OVERLOAD:
1710                 if (fe->ops.diseqc_reset_overload) {
1711                         err = fe->ops.diseqc_reset_overload(fe);
1712                         fepriv->state = FESTATE_DISEQC;
1713                         fepriv->status = 0;
1714                 }
1715                 break;
1716
1717         case FE_DISEQC_SEND_MASTER_CMD:
1718                 if (fe->ops.diseqc_send_master_cmd) {
1719                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1720                         fepriv->state = FESTATE_DISEQC;
1721                         fepriv->status = 0;
1722                 }
1723                 break;
1724
1725         case FE_DISEQC_SEND_BURST:
1726                 if (fe->ops.diseqc_send_burst) {
1727                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1728                         fepriv->state = FESTATE_DISEQC;
1729                         fepriv->status = 0;
1730                 }
1731                 break;
1732
1733         case FE_SET_TONE:
1734                 if (fe->ops.set_tone) {
1735                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1736                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1737                         fepriv->state = FESTATE_DISEQC;
1738                         fepriv->status = 0;
1739                 }
1740                 break;
1741
1742         case FE_SET_VOLTAGE:
1743                 if (fe->ops.set_voltage) {
1744                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1745                         fepriv->voltage = (fe_sec_voltage_t) parg;
1746                         fepriv->state = FESTATE_DISEQC;
1747                         fepriv->status = 0;
1748                 }
1749                 break;
1750
1751         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1752                 if (fe->ops.dishnetwork_send_legacy_command) {
1753                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1754                         fepriv->state = FESTATE_DISEQC;
1755                         fepriv->status = 0;
1756                 } else if (fe->ops.set_voltage) {
1757                         /*
1758                          * NOTE: This is a fallback condition.  Some frontends
1759                          * (stv0299 for instance) take longer than 8msec to
1760                          * respond to a set_voltage command.  Those switches
1761                          * need custom routines to switch properly.  For all
1762                          * other frontends, the following should work ok.
1763                          * Dish network legacy switches (as used by Dish500)
1764                          * are controlled by sending 9-bit command words
1765                          * spaced 8msec apart.
1766                          * the actual command word is switch/port dependent
1767                          * so it is up to the userspace application to send
1768                          * the right command.
1769                          * The command must always start with a '0' after
1770                          * initialization, so parg is 8 bits and does not
1771                          * include the initialization or start bit
1772                          */
1773                         unsigned long swcmd = ((unsigned long) parg) << 1;
1774                         struct timeval nexttime;
1775                         struct timeval tv[10];
1776                         int i;
1777                         u8 last = 1;
1778                         if (dvb_frontend_debug)
1779                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1780                         do_gettimeofday(&nexttime);
1781                         if (dvb_frontend_debug)
1782                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1783                         /* before sending a command, initialize by sending
1784                          * a 32ms 18V to the switch
1785                          */
1786                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1787                         dvb_frontend_sleep_until(&nexttime, 32000);
1788
1789                         for (i = 0; i < 9; i++) {
1790                                 if (dvb_frontend_debug)
1791                                         do_gettimeofday(&tv[i + 1]);
1792                                 if ((swcmd & 0x01) != last) {
1793                                         /* set voltage to (last ? 13V : 18V) */
1794                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1795                                         last = (last) ? 0 : 1;
1796                                 }
1797                                 swcmd = swcmd >> 1;
1798                                 if (i != 8)
1799                                         dvb_frontend_sleep_until(&nexttime, 8000);
1800                         }
1801                         if (dvb_frontend_debug) {
1802                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1803                                         __func__, fe->dvb->num);
1804                                 for (i = 1; i < 10; i++)
1805                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1806                         }
1807                         err = 0;
1808                         fepriv->state = FESTATE_DISEQC;
1809                         fepriv->status = 0;
1810                 }
1811                 break;
1812
1813         case FE_DISEQC_RECV_SLAVE_REPLY:
1814                 if (fe->ops.diseqc_recv_slave_reply)
1815                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1816                 break;
1817
1818         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1819                 if (fe->ops.enable_high_lnb_voltage)
1820                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1821                 break;
1822
1823         case FE_SET_FRONTEND: {
1824                 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1825                 struct dvb_frontend_tune_settings fetunesettings;
1826
1827                 if (c->state == DTV_TUNE) {
1828                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters_in) < 0) {
1829                                 err = -EINVAL;
1830                                 break;
1831                         }
1832                 } else {
1833                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1834                                 err = -EINVAL;
1835                                 break;
1836                         }
1837
1838                         memcpy (&fepriv->parameters_in, parg,
1839                                 sizeof (struct dvb_frontend_parameters));
1840                         dtv_property_cache_init(fe, c);
1841                         dtv_property_cache_sync(fe, c, &fepriv->parameters_in);
1842                 }
1843
1844                 /*
1845                  * Initialize output parameters to match the values given by
1846                  * the user. FE_SET_FRONTEND triggers an initial frontend event
1847                  * with status = 0, which copies output parameters to userspace.
1848                  */
1849                 fepriv->parameters_out = fepriv->parameters_in;
1850
1851                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1852                 memcpy(&fetunesettings.parameters, parg,
1853                        sizeof (struct dvb_frontend_parameters));
1854
1855                 /* force auto frequency inversion if requested */
1856                 if (dvb_force_auto_inversion) {
1857                         fepriv->parameters_in.inversion = INVERSION_AUTO;
1858                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1859                 }
1860                 if (fe->ops.info.type == FE_OFDM) {
1861                         /* without hierarchical coding code_rate_LP is irrelevant,
1862                          * so we tolerate the otherwise invalid FEC_NONE setting */
1863                         if (fepriv->parameters_in.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1864                             fepriv->parameters_in.u.ofdm.code_rate_LP == FEC_NONE)
1865                                 fepriv->parameters_in.u.ofdm.code_rate_LP = FEC_AUTO;
1866                 }
1867
1868                 /* get frontend-specific tuning settings */
1869                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1870                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1871                         fepriv->max_drift = fetunesettings.max_drift;
1872                         fepriv->step_size = fetunesettings.step_size;
1873                 } else {
1874                         /* default values */
1875                         switch(fe->ops.info.type) {
1876                         case FE_QPSK:
1877                                 fepriv->min_delay = HZ/20;
1878                                 fepriv->step_size = fepriv->parameters_in.u.qpsk.symbol_rate / 16000;
1879                                 fepriv->max_drift = fepriv->parameters_in.u.qpsk.symbol_rate / 2000;
1880                                 break;
1881
1882                         case FE_QAM:
1883                                 fepriv->min_delay = HZ/20;
1884                                 fepriv->step_size = 0; /* no zigzag */
1885                                 fepriv->max_drift = 0;
1886                                 break;
1887
1888                         case FE_OFDM:
1889                                 fepriv->min_delay = HZ/20;
1890                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1891                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1892                                 break;
1893                         case FE_ATSC:
1894                                 fepriv->min_delay = HZ/20;
1895                                 fepriv->step_size = 0;
1896                                 fepriv->max_drift = 0;
1897                                 break;
1898                         }
1899                 }
1900                 if (dvb_override_tune_delay > 0)
1901                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1902
1903                 fepriv->state = FESTATE_RETUNE;
1904
1905                 /* Request the search algorithm to search */
1906                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1907
1908                 dvb_frontend_clear_events(fe);
1909                 dvb_frontend_add_event(fe, 0);
1910                 dvb_frontend_wakeup(fe);
1911                 fepriv->status = 0;
1912                 err = 0;
1913                 break;
1914         }
1915
1916         case FE_GET_EVENT:
1917                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1918                 break;
1919
1920         case FE_GET_FRONTEND:
1921                 if (fe->ops.get_frontend) {
1922                         err = fe->ops.get_frontend(fe, &fepriv->parameters_out);
1923                         memcpy(parg, &fepriv->parameters_out, sizeof(struct dvb_frontend_parameters));
1924                 }
1925                 break;
1926
1927         case FE_SET_FRONTEND_TUNE_MODE:
1928                 fepriv->tune_mode_flags = (unsigned long) parg;
1929                 err = 0;
1930                 break;
1931         };
1932
1933         if (fe->dvb->fe_ioctl_override) {
1934                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1935                                                     DVB_FE_IOCTL_POST);
1936                 if (cb_err < 0)
1937                         return cb_err;
1938         }
1939
1940         return err;
1941 }
1942
1943
1944 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1945 {
1946         struct dvb_device *dvbdev = file->private_data;
1947         struct dvb_frontend *fe = dvbdev->priv;
1948         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1949
1950         dprintk ("%s\n", __func__);
1951
1952         poll_wait (file, &fepriv->events.wait_queue, wait);
1953
1954         if (fepriv->events.eventw != fepriv->events.eventr)
1955                 return (POLLIN | POLLRDNORM | POLLPRI);
1956
1957         return 0;
1958 }
1959
1960 static int dvb_frontend_open(struct inode *inode, struct file *file)
1961 {
1962         struct dvb_device *dvbdev = file->private_data;
1963         struct dvb_frontend *fe = dvbdev->priv;
1964         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1965         struct dvb_adapter *adapter = fe->dvb;
1966         int ret;
1967
1968         dprintk ("%s\n", __func__);
1969         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
1970                 return -ENODEV;
1971
1972         if (adapter->mfe_shared) {
1973                 mutex_lock (&adapter->mfe_lock);
1974
1975                 if (adapter->mfe_dvbdev == NULL)
1976                         adapter->mfe_dvbdev = dvbdev;
1977
1978                 else if (adapter->mfe_dvbdev != dvbdev) {
1979                         struct dvb_device
1980                                 *mfedev = adapter->mfe_dvbdev;
1981                         struct dvb_frontend
1982                                 *mfe = mfedev->priv;
1983                         struct dvb_frontend_private
1984                                 *mfepriv = mfe->frontend_priv;
1985                         int mferetry = (dvb_mfe_wait_time << 1);
1986
1987                         mutex_unlock (&adapter->mfe_lock);
1988                         while (mferetry-- && (mfedev->users != -1 ||
1989                                         mfepriv->thread != NULL)) {
1990                                 if(msleep_interruptible(500)) {
1991                                         if(signal_pending(current))
1992                                                 return -EINTR;
1993                                 }
1994                         }
1995
1996                         mutex_lock (&adapter->mfe_lock);
1997                         if(adapter->mfe_dvbdev != dvbdev) {
1998                                 mfedev = adapter->mfe_dvbdev;
1999                                 mfe = mfedev->priv;
2000                                 mfepriv = mfe->frontend_priv;
2001                                 if (mfedev->users != -1 ||
2002                                                 mfepriv->thread != NULL) {
2003                                         mutex_unlock (&adapter->mfe_lock);
2004                                         return -EBUSY;
2005                                 }
2006                                 adapter->mfe_dvbdev = dvbdev;
2007                         }
2008                 }
2009         }
2010
2011         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2012                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2013                         goto err0;
2014
2015                 /* If we took control of the bus, we need to force
2016                    reinitialization.  This is because many ts_bus_ctrl()
2017                    functions strobe the RESET pin on the demod, and if the
2018                    frontend thread already exists then the dvb_init() routine
2019                    won't get called (which is what usually does initial
2020                    register configuration). */
2021                 fepriv->reinitialise = 1;
2022         }
2023
2024         if ((ret = dvb_generic_open (inode, file)) < 0)
2025                 goto err1;
2026
2027         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2028                 /* normal tune mode when opened R/W */
2029                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2030                 fepriv->tone = -1;
2031                 fepriv->voltage = -1;
2032
2033                 ret = dvb_frontend_start (fe);
2034                 if (ret)
2035                         goto err2;
2036
2037                 /*  empty event queue */
2038                 fepriv->events.eventr = fepriv->events.eventw = 0;
2039         }
2040
2041         if (adapter->mfe_shared)
2042                 mutex_unlock (&adapter->mfe_lock);
2043         return ret;
2044
2045 err2:
2046         dvb_generic_release(inode, file);
2047 err1:
2048         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2049                 fe->ops.ts_bus_ctrl(fe, 0);
2050 err0:
2051         if (adapter->mfe_shared)
2052                 mutex_unlock (&adapter->mfe_lock);
2053         return ret;
2054 }
2055
2056 static int dvb_frontend_release(struct inode *inode, struct file *file)
2057 {
2058         struct dvb_device *dvbdev = file->private_data;
2059         struct dvb_frontend *fe = dvbdev->priv;
2060         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2061         int ret;
2062
2063         dprintk ("%s\n", __func__);
2064
2065         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
2066                 fepriv->release_jiffies = jiffies;
2067
2068         ret = dvb_generic_release (inode, file);
2069
2070         if (dvbdev->users == -1) {
2071                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2072                         fops_put(file->f_op);
2073                         file->f_op = NULL;
2074                         wake_up(&dvbdev->wait_queue);
2075                 }
2076                 if (fe->ops.ts_bus_ctrl)
2077                         fe->ops.ts_bus_ctrl(fe, 0);
2078         }
2079
2080         return ret;
2081 }
2082
2083 static const struct file_operations dvb_frontend_fops = {
2084         .owner          = THIS_MODULE,
2085         .unlocked_ioctl = dvb_generic_ioctl,
2086         .poll           = dvb_frontend_poll,
2087         .open           = dvb_frontend_open,
2088         .release        = dvb_frontend_release,
2089         .llseek         = noop_llseek,
2090 };
2091
2092 int dvb_register_frontend(struct dvb_adapter* dvb,
2093                           struct dvb_frontend* fe)
2094 {
2095         struct dvb_frontend_private *fepriv;
2096         static const struct dvb_device dvbdev_template = {
2097                 .users = ~0,
2098                 .writers = 1,
2099                 .readers = (~0)-1,
2100                 .fops = &dvb_frontend_fops,
2101                 .kernel_ioctl = dvb_frontend_ioctl
2102         };
2103
2104         dprintk ("%s\n", __func__);
2105
2106         if (mutex_lock_interruptible(&frontend_mutex))
2107                 return -ERESTARTSYS;
2108
2109         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2110         if (fe->frontend_priv == NULL) {
2111                 mutex_unlock(&frontend_mutex);
2112                 return -ENOMEM;
2113         }
2114         fepriv = fe->frontend_priv;
2115
2116         sema_init(&fepriv->sem, 1);
2117         init_waitqueue_head (&fepriv->wait_queue);
2118         init_waitqueue_head (&fepriv->events.wait_queue);
2119         mutex_init(&fepriv->events.mtx);
2120         fe->dvb = dvb;
2121         fepriv->inversion = INVERSION_OFF;
2122
2123         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2124                 fe->dvb->num,
2125                 fe->id,
2126                 fe->ops.info.name);
2127
2128         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2129                              fe, DVB_DEVICE_FRONTEND);
2130
2131         mutex_unlock(&frontend_mutex);
2132         return 0;
2133 }
2134 EXPORT_SYMBOL(dvb_register_frontend);
2135
2136 int dvb_unregister_frontend(struct dvb_frontend* fe)
2137 {
2138         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2139         dprintk ("%s\n", __func__);
2140
2141         mutex_lock(&frontend_mutex);
2142         dvb_frontend_stop (fe);
2143         mutex_unlock(&frontend_mutex);
2144
2145         if (fepriv->dvbdev->users < -1)
2146                 wait_event(fepriv->dvbdev->wait_queue,
2147                                 fepriv->dvbdev->users==-1);
2148
2149         mutex_lock(&frontend_mutex);
2150         dvb_unregister_device (fepriv->dvbdev);
2151
2152         /* fe is invalid now */
2153         kfree(fepriv);
2154         mutex_unlock(&frontend_mutex);
2155         return 0;
2156 }
2157 EXPORT_SYMBOL(dvb_unregister_frontend);
2158
2159 #ifdef CONFIG_MEDIA_ATTACH
2160 void dvb_frontend_detach(struct dvb_frontend* fe)
2161 {
2162         void *ptr;
2163
2164         if (fe->ops.release_sec) {
2165                 fe->ops.release_sec(fe);
2166                 symbol_put_addr(fe->ops.release_sec);
2167         }
2168         if (fe->ops.tuner_ops.release) {
2169                 fe->ops.tuner_ops.release(fe);
2170                 symbol_put_addr(fe->ops.tuner_ops.release);
2171         }
2172         if (fe->ops.analog_ops.release) {
2173                 fe->ops.analog_ops.release(fe);
2174                 symbol_put_addr(fe->ops.analog_ops.release);
2175         }
2176         ptr = (void*)fe->ops.release;
2177         if (ptr) {
2178                 fe->ops.release(fe);
2179                 symbol_put_addr(ptr);
2180         }
2181 }
2182 #else
2183 void dvb_frontend_detach(struct dvb_frontend* fe)
2184 {
2185         if (fe->ops.release_sec)
2186                 fe->ops.release_sec(fe);
2187         if (fe->ops.tuner_ops.release)
2188                 fe->ops.tuner_ops.release(fe);
2189         if (fe->ops.analog_ops.release)
2190                 fe->ops.analog_ops.release(fe);
2191         if (fe->ops.release)
2192                 fe->ops.release(fe);
2193 }
2194 #endif
2195 EXPORT_SYMBOL(dvb_frontend_detach);