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 /* Enables DVBv3 compatibility bits at the headers */
  29 #define __DVB_CORE__
  30
  31 #include <linux/string.h>
  32 #include <linux/kernel.h>
  33 #include <linux/sched.h>
  34 #include <linux/wait.h>
  35 #include <linux/slab.h>
  36 #include <linux/poll.h>
  37 #include <linux/semaphore.h>
  38 #include <linux/module.h>
  39 #include <linux/list.h>
  40 #include <linux/freezer.h>
  41 #include <linux/jiffies.h>
  42 #include <linux/kthread.h>
  43 #include <asm/processor.h>
  44
  45 #include "dvb_frontend.h"
  46 #include "dvbdev.h"
  47 #include <linux/dvb/version.h>
  48
  49 static int dvb_frontend_debug;
  50 static int dvb_shutdown_timeout;
  51 static int dvb_force_auto_inversion;
  52 static int dvb_override_tune_delay;
  53 static int dvb_powerdown_on_sleep = 1;
  54 static int dvb_mfe_wait_time = 5;
  55
  56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  58 module_param(dvb_shutdown_timeout, int, 0644);
  59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  60 module_param(dvb_force_auto_inversion, int, 0644);
  61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  62 module_param(dvb_override_tune_delay, int, 0644);
  63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  64 module_param(dvb_powerdown_on_sleep, int, 0644);
  65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  66 module_param(dvb_mfe_wait_time, int, 0644);
  67 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)");
  68
  69 #define dprintk if (dvb_frontend_debug) printk
  70
  71 #define FESTATE_IDLE 1
  72 #define FESTATE_RETUNE 2
  73 #define FESTATE_TUNING_FAST 4
  74 #define FESTATE_TUNING_SLOW 8
  75 #define FESTATE_TUNED 16
  76 #define FESTATE_ZIGZAG_FAST 32
  77 #define FESTATE_ZIGZAG_SLOW 64
  78 #define FESTATE_DISEQC 128
  79 #define FESTATE_ERROR 256
  80 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  81 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  82 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  83 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  84
  85 #define FE_ALGO_HW              1
  86 /*
  87  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  88  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  89  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  90  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  91  * FESTATE_TUNED. The frontend has successfully locked on.
  92  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  93  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  94  * FESTATE_DISEQC. A DISEQC command has just been issued.
  95  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  96  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  97  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  98  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  99  */
 100
 101 #define DVB_FE_NO_EXIT  0
 102 #define DVB_FE_NORMAL_EXIT      1
 103 #define DVB_FE_DEVICE_REMOVED   2
 104
 105 static DEFINE_MUTEX(frontend_mutex);
 106
 107 struct dvb_frontend_private {
 108
 109         /* thread/frontend values */
 110         struct dvb_device *dvbdev;
 111         struct dvb_frontend_parameters parameters_out;
 112         struct dvb_fe_events events;
 113         struct semaphore sem;
 114         struct list_head list_head;
 115         wait_queue_head_t wait_queue;
 116         struct task_struct *thread;
 117         unsigned long release_jiffies;
 118         unsigned int exit;
 119         unsigned int wakeup;
 120         fe_status_t status;
 121         unsigned long tune_mode_flags;
 122         unsigned int delay;
 123         unsigned int reinitialise;
 124         int tone;
 125         int voltage;
 126
 127         /* swzigzag values */
 128         unsigned int state;
 129         unsigned int bending;
 130         int lnb_drift;
 131         unsigned int inversion;
 132         unsigned int auto_step;
 133         unsigned int auto_sub_step;
 134         unsigned int started_auto_step;
 135         unsigned int min_delay;
 136         unsigned int max_drift;
 137         unsigned int step_size;
 138         int quality;
 139         unsigned int check_wrapped;
 140         enum dvbfe_search algo_status;
 141 };
 142
 143 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 144 static int dtv_get_frontend(struct dvb_frontend *fe,
 145                             struct dvb_frontend_parameters *p_out);
 146
 147 static bool has_get_frontend(struct dvb_frontend *fe)
 148 {
 149         return fe->ops.get_frontend;
 150 }
 151
 152 /*
 153  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 154  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 155  * otherwise, a DVBv3 call will fail.
 156  */
 157 enum dvbv3_emulation_type {
 158         DVBV3_UNKNOWN,
 159         DVBV3_QPSK,
 160         DVBV3_QAM,
 161         DVBV3_OFDM,
 162         DVBV3_ATSC,
 163 };
 164
 165 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 166 {
 167         switch (delivery_system) {
 168         case SYS_DVBC_ANNEX_A:
 169         case SYS_DVBC_ANNEX_C:
 170                 return DVBV3_QAM;
 171         case SYS_DVBS:
 172         case SYS_DVBS2:
 173         case SYS_TURBO:
 174         case SYS_ISDBS:
 175         case SYS_DSS:
 176                 return DVBV3_QPSK;
 177         case SYS_DVBT:
 178         case SYS_DVBT2:
 179         case SYS_ISDBT:
 180         case SYS_DMBTH:
 181                 return DVBV3_OFDM;
 182         case SYS_ATSC:
 183         case SYS_DVBC_ANNEX_B:
 184                 return DVBV3_ATSC;
 185         case SYS_UNDEFINED:
 186         case SYS_ISDBC:
 187         case SYS_DVBH:
 188         case SYS_DAB:
 189         case SYS_ATSCMH:
 190         default:
 191                 /*
 192                  * Doesn't know how to emulate those types and/or
 193                  * there's no frontend driver from this type yet
 194                  * with some emulation code, so, we're not sure yet how
 195                  * to handle them, or they're not compatible with a DVBv3 call.
 196                  */
 197                 return DVBV3_UNKNOWN;
 198         }
 199 }
 200
 201 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 202 {
 203         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 204         struct dvb_fe_events *events = &fepriv->events;
 205         struct dvb_frontend_event *e;
 206         int wp;
 207
 208         dprintk ("%s\n", __func__);
 209
 210         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 211                 dtv_get_frontend(fe, &fepriv->parameters_out);
 212
 213         mutex_lock(&events->mtx);
 214
 215         wp = (events->eventw + 1) % MAX_EVENT;
 216         if (wp == events->eventr) {
 217                 events->overflow = 1;
 218                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 219         }
 220
 221         e = &events->events[events->eventw];
 222         e->status = status;
 223         e->parameters = fepriv->parameters_out;
 224
 225         events->eventw = wp;
 226
 227         mutex_unlock(&events->mtx);
 228
 229         wake_up_interruptible (&events->wait_queue);
 230 }
 231
 232 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 233                             struct dvb_frontend_event *event, int flags)
 234 {
 235         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 236         struct dvb_fe_events *events = &fepriv->events;
 237
 238         dprintk ("%s\n", __func__);
 239
 240         if (events->overflow) {
 241                 events->overflow = 0;
 242                 return -EOVERFLOW;
 243         }
 244
 245         if (events->eventw == events->eventr) {
 246                 int ret;
 247
 248                 if (flags & O_NONBLOCK)
 249                         return -EWOULDBLOCK;
 250
 251                 up(&fepriv->sem);
 252
 253                 ret = wait_event_interruptible (events->wait_queue,
 254                                                 events->eventw != events->eventr);
 255
 256                 if (down_interruptible (&fepriv->sem))
 257                         return -ERESTARTSYS;
 258
 259                 if (ret < 0)
 260                         return ret;
 261         }
 262
 263         mutex_lock(&events->mtx);
 264         *event = events->events[events->eventr];
 265         events->eventr = (events->eventr + 1) % MAX_EVENT;
 266         mutex_unlock(&events->mtx);
 267
 268         return 0;
 269 }
 270
 271 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 272 {
 273         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 274         struct dvb_fe_events *events = &fepriv->events;
 275
 276         mutex_lock(&events->mtx);
 277         events->eventr = events->eventw;
 278         mutex_unlock(&events->mtx);
 279 }
 280
 281 static void dvb_frontend_init(struct dvb_frontend *fe)
 282 {
 283         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 284                  fe->dvb->num,
 285                  fe->id,
 286                  fe->ops.info.name);
 287
 288         if (fe->ops.init)
 289                 fe->ops.init(fe);
 290         if (fe->ops.tuner_ops.init) {
 291                 if (fe->ops.i2c_gate_ctrl)
 292                         fe->ops.i2c_gate_ctrl(fe, 1);
 293                 fe->ops.tuner_ops.init(fe);
 294                 if (fe->ops.i2c_gate_ctrl)
 295                         fe->ops.i2c_gate_ctrl(fe, 0);
 296         }
 297 }
 298
 299 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 300 {
 301         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 302
 303         fepriv->reinitialise = 1;
 304         dvb_frontend_wakeup(fe);
 305 }
 306 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 307
 308 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 309 {
 310         int q2;
 311
 312         dprintk ("%s\n", __func__);
 313
 314         if (locked)
 315                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 316         else
 317                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 318
 319         q2 = fepriv->quality - 128;
 320         q2 *= q2;
 321
 322         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 323 }
 324
 325 /**
 326  * Performs automatic twiddling of frontend parameters.
 327  *
 328  * @param fe The frontend concerned.
 329  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 330  * @returns Number of complete iterations that have been performed.
 331  */
 332 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 333 {
 334         int autoinversion;
 335         int ready = 0;
 336         int fe_set_err = 0;
 337         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 338         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 339         int original_inversion = c->inversion;
 340         u32 original_frequency = c->frequency;
 341
 342         /* are we using autoinversion? */
 343         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 344                          (c->inversion == INVERSION_AUTO));
 345
 346         /* setup parameters correctly */
 347         while(!ready) {
 348                 /* calculate the lnb_drift */
 349                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 350
 351                 /* wrap the auto_step if we've exceeded the maximum drift */
 352                 if (fepriv->lnb_drift > fepriv->max_drift) {
 353                         fepriv->auto_step = 0;
 354                         fepriv->auto_sub_step = 0;
 355                         fepriv->lnb_drift = 0;
 356                 }
 357
 358                 /* perform inversion and +/- zigzag */
 359                 switch(fepriv->auto_sub_step) {
 360                 case 0:
 361                         /* try with the current inversion and current drift setting */
 362                         ready = 1;
 363                         break;
 364
 365                 case 1:
 366                         if (!autoinversion) break;
 367
 368                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 369                         ready = 1;
 370                         break;
 371
 372                 case 2:
 373                         if (fepriv->lnb_drift == 0) break;
 374
 375                         fepriv->lnb_drift = -fepriv->lnb_drift;
 376                         ready = 1;
 377                         break;
 378
 379                 case 3:
 380                         if (fepriv->lnb_drift == 0) break;
 381                         if (!autoinversion) break;
 382
 383                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 384                         fepriv->lnb_drift = -fepriv->lnb_drift;
 385                         ready = 1;
 386                         break;
 387
 388                 default:
 389                         fepriv->auto_step++;
 390                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 391                         break;
 392                 }
 393
 394                 if (!ready) fepriv->auto_sub_step++;
 395         }
 396
 397         /* if this attempt would hit where we started, indicate a complete
 398          * iteration has occurred */
 399         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 400             (fepriv->auto_sub_step == 0) && check_wrapped) {
 401                 return 1;
 402         }
 403
 404         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 405                 "auto_sub_step:%i started_auto_step:%i\n",
 406                 __func__, fepriv->lnb_drift, fepriv->inversion,
 407                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 408
 409         /* set the frontend itself */
 410         c->frequency += fepriv->lnb_drift;
 411         if (autoinversion)
 412                 c->inversion = fepriv->inversion;
 413         tmp = *c;
 414         if (fe->ops.set_frontend)
 415                 fe_set_err = fe->ops.set_frontend(fe);
 416         *c = tmp;
 417         if (fe_set_err < 0) {
 418                 fepriv->state = FESTATE_ERROR;
 419                 return fe_set_err;
 420         }
 421
 422         c->frequency = original_frequency;
 423         c->inversion = original_inversion;
 424
 425         fepriv->auto_sub_step++;
 426         return 0;
 427 }
 428
 429 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 430 {
 431         fe_status_t s = 0;
 432         int retval = 0;
 433         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 434         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 435
 436         /* if we've got no parameters, just keep idling */
 437         if (fepriv->state & FESTATE_IDLE) {
 438                 fepriv->delay = 3*HZ;
 439                 fepriv->quality = 0;
 440                 return;
 441         }
 442
 443         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 444         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 445                 if (fepriv->state & FESTATE_RETUNE) {
 446                         tmp = *c;
 447                         if (fe->ops.set_frontend)
 448                                 retval = fe->ops.set_frontend(fe);
 449                         *c = tmp;
 450                         if (retval < 0)
 451                                 fepriv->state = FESTATE_ERROR;
 452                         else
 453                                 fepriv->state = FESTATE_TUNED;
 454                 }
 455                 fepriv->delay = 3*HZ;
 456                 fepriv->quality = 0;
 457                 return;
 458         }
 459
 460         /* get the frontend status */
 461         if (fepriv->state & FESTATE_RETUNE) {
 462                 s = 0;
 463         } else {
 464                 if (fe->ops.read_status)
 465                         fe->ops.read_status(fe, &s);
 466                 if (s != fepriv->status) {
 467                         dvb_frontend_add_event(fe, s);
 468                         fepriv->status = s;
 469                 }
 470         }
 471
 472         /* if we're not tuned, and we have a lock, move to the TUNED state */
 473         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 474                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 475                 fepriv->state = FESTATE_TUNED;
 476
 477                 /* if we're tuned, then we have determined the correct inversion */
 478                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 479                     (c->inversion == INVERSION_AUTO)) {
 480                         c->inversion = fepriv->inversion;
 481                 }
 482                 return;
 483         }
 484
 485         /* if we are tuned already, check we're still locked */
 486         if (fepriv->state & FESTATE_TUNED) {
 487                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 488
 489                 /* we're tuned, and the lock is still good... */
 490                 if (s & FE_HAS_LOCK) {
 491                         return;
 492                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 493                         fepriv->state = FESTATE_ZIGZAG_FAST;
 494                         fepriv->started_auto_step = fepriv->auto_step;
 495                         fepriv->check_wrapped = 0;
 496                 }
 497         }
 498
 499         /* don't actually do anything if we're in the LOSTLOCK state,
 500          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 501         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 502             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 503                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 504                 return;
 505         }
 506
 507         /* don't do anything if we're in the DISEQC state, since this
 508          * might be someone with a motorized dish controlled by DISEQC.
 509          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 510         if (fepriv->state & FESTATE_DISEQC) {
 511                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 512                 return;
 513         }
 514
 515         /* if we're in the RETUNE state, set everything up for a brand
 516          * new scan, keeping the current inversion setting, as the next
 517          * tune is _very_ likely to require the same */
 518         if (fepriv->state & FESTATE_RETUNE) {
 519                 fepriv->lnb_drift = 0;
 520                 fepriv->auto_step = 0;
 521                 fepriv->auto_sub_step = 0;
 522                 fepriv->started_auto_step = 0;
 523                 fepriv->check_wrapped = 0;
 524         }
 525
 526         /* fast zigzag. */
 527         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 528                 fepriv->delay = fepriv->min_delay;
 529
 530                 /* perform a tune */
 531                 retval = dvb_frontend_swzigzag_autotune(fe,
 532                                                         fepriv->check_wrapped);
 533                 if (retval < 0) {
 534                         return;
 535                 } else if (retval) {
 536                         /* OK, if we've run out of trials at the fast speed.
 537                          * Drop back to slow for the _next_ attempt */
 538                         fepriv->state = FESTATE_SEARCHING_SLOW;
 539                         fepriv->started_auto_step = fepriv->auto_step;
 540                         return;
 541                 }
 542                 fepriv->check_wrapped = 1;
 543
 544                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 545                  * This ensures we cannot return from an
 546                  * FE_SET_FRONTEND ioctl before the first frontend tune
 547                  * occurs */
 548                 if (fepriv->state & FESTATE_RETUNE) {
 549                         fepriv->state = FESTATE_TUNING_FAST;
 550                 }
 551         }
 552
 553         /* slow zigzag */
 554         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 555                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 556
 557                 /* Note: don't bother checking for wrapping; we stay in this
 558                  * state until we get a lock */
 559                 dvb_frontend_swzigzag_autotune(fe, 0);
 560         }
 561 }
 562
 563 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 564 {
 565         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 566
 567         if (fepriv->exit != DVB_FE_NO_EXIT)
 568                 return 1;
 569
 570         if (fepriv->dvbdev->writers == 1)
 571                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 572                                   dvb_shutdown_timeout * HZ))
 573                         return 1;
 574
 575         return 0;
 576 }
 577
 578 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 579 {
 580         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 581
 582         if (fepriv->wakeup) {
 583                 fepriv->wakeup = 0;
 584                 return 1;
 585         }
 586         return dvb_frontend_is_exiting(fe);
 587 }
 588
 589 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 590 {
 591         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 592
 593         fepriv->wakeup = 1;
 594         wake_up_interruptible(&fepriv->wait_queue);
 595 }
 596
 597 static int dvb_frontend_thread(void *data)
 598 {
 599         struct dvb_frontend *fe = data;
 600         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 601         fe_status_t s;
 602         enum dvbfe_algo algo;
 603
 604         bool re_tune = false;
 605
 606         dprintk("%s\n", __func__);
 607
 608         fepriv->check_wrapped = 0;
 609         fepriv->quality = 0;
 610         fepriv->delay = 3*HZ;
 611         fepriv->status = 0;
 612         fepriv->wakeup = 0;
 613         fepriv->reinitialise = 0;
 614
 615         dvb_frontend_init(fe);
 616
 617         set_freezable();
 618         while (1) {
 619                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 620 restart:
 621                 wait_event_interruptible_timeout(fepriv->wait_queue,
 622                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 623                                 || freezing(current),
 624                         fepriv->delay);
 625
 626                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 627                         /* got signal or quitting */
 628                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 629                         break;
 630                 }
 631
 632                 if (try_to_freeze())
 633                         goto restart;
 634
 635                 if (down_interruptible(&fepriv->sem))
 636                         break;
 637
 638                 if (fepriv->reinitialise) {
 639                         dvb_frontend_init(fe);
 640                         if (fe->ops.set_tone && fepriv->tone != -1)
 641                                 fe->ops.set_tone(fe, fepriv->tone);
 642                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 643                                 fe->ops.set_voltage(fe, fepriv->voltage);
 644                         fepriv->reinitialise = 0;
 645                 }
 646
 647                 /* do an iteration of the tuning loop */
 648                 if (fe->ops.get_frontend_algo) {
 649                         algo = fe->ops.get_frontend_algo(fe);
 650                         switch (algo) {
 651                         case DVBFE_ALGO_HW:
 652                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 653
 654                                 if (fepriv->state & FESTATE_RETUNE) {
 655                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 656                                         re_tune = true;
 657                                         fepriv->state = FESTATE_TUNED;
 658                                 } else {
 659                                         re_tune = false;
 660                                 }
 661
 662                                 if (fe->ops.tune)
 663                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 664
 665                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 666                                         dprintk("%s: state changed, adding current state\n", __func__);
 667                                         dvb_frontend_add_event(fe, s);
 668                                         fepriv->status = s;
 669                                 }
 670                                 break;
 671                         case DVBFE_ALGO_SW:
 672                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 673                                 dvb_frontend_swzigzag(fe);
 674                                 break;
 675                         case DVBFE_ALGO_CUSTOM:
 676                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 677                                 if (fepriv->state & FESTATE_RETUNE) {
 678                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 679                                         fepriv->state = FESTATE_TUNED;
 680                                 }
 681                                 /* Case where we are going to search for a carrier
 682                                  * User asked us to retune again for some reason, possibly
 683                                  * requesting a search with a new set of parameters
 684                                  */
 685                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 686                                         if (fe->ops.search) {
 687                                                 fepriv->algo_status = fe->ops.search(fe);
 688                                                 /* We did do a search as was requested, the flags are
 689                                                  * now unset as well and has the flags wrt to search.
 690                                                  */
 691                                         } else {
 692                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 693                                         }
 694                                 }
 695                                 /* Track the carrier if the search was successful */
 696                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 697                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 698                                         fepriv->delay = HZ / 2;
 699                                 }
 700                                 fe->ops.read_status(fe, &s);
 701                                 if (s != fepriv->status) {
 702                                         dvb_frontend_add_event(fe, s); /* update event list */
 703                                         fepriv->status = s;
 704                                         if (!(s & FE_HAS_LOCK)) {
 705                                                 fepriv->delay = HZ / 10;
 706                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 707                                         } else {
 708                                                 fepriv->delay = 60 * HZ;
 709                                         }
 710                                 }
 711                                 break;
 712                         default:
 713                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 714                                 break;
 715                         }
 716                 } else {
 717                         dvb_frontend_swzigzag(fe);
 718                 }
 719         }
 720
 721         if (dvb_powerdown_on_sleep) {
 722                 if (fe->ops.set_voltage)
 723                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 724                 if (fe->ops.tuner_ops.sleep) {
 725                         if (fe->ops.i2c_gate_ctrl)
 726                                 fe->ops.i2c_gate_ctrl(fe, 1);
 727                         fe->ops.tuner_ops.sleep(fe);
 728                         if (fe->ops.i2c_gate_ctrl)
 729                                 fe->ops.i2c_gate_ctrl(fe, 0);
 730                 }
 731                 if (fe->ops.sleep)
 732                         fe->ops.sleep(fe);
 733         }
 734
 735         fepriv->thread = NULL;
 736         if (kthread_should_stop())
 737                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 738         else
 739                 fepriv->exit = DVB_FE_NO_EXIT;
 740         mb();
 741
 742         dvb_frontend_wakeup(fe);
 743         return 0;
 744 }
 745
 746 static void dvb_frontend_stop(struct dvb_frontend *fe)
 747 {
 748         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 749
 750         dprintk ("%s\n", __func__);
 751
 752         fepriv->exit = DVB_FE_NORMAL_EXIT;
 753         mb();
 754
 755         if (!fepriv->thread)
 756                 return;
 757
 758         kthread_stop(fepriv->thread);
 759
 760         sema_init(&fepriv->sem, 1);
 761         fepriv->state = FESTATE_IDLE;
 762
 763         /* paranoia check in case a signal arrived */
 764         if (fepriv->thread)
 765                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 766                                 fepriv->thread);
 767 }
 768
 769 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 770 {
 771         return ((curtime.tv_usec < lasttime.tv_usec) ?
 772                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 773                 curtime.tv_usec - lasttime.tv_usec);
 774 }
 775 EXPORT_SYMBOL(timeval_usec_diff);
 776
 777 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 778 {
 779         curtime->tv_usec += add_usec;
 780         if (curtime->tv_usec >= 1000000) {
 781                 curtime->tv_usec -= 1000000;
 782                 curtime->tv_sec++;
 783         }
 784 }
 785
 786 /*
 787  * Sleep until gettimeofday() > waketime + add_usec
 788  * This needs to be as precise as possible, but as the delay is
 789  * usually between 2ms and 32ms, it is done using a scheduled msleep
 790  * followed by usleep (normally a busy-wait loop) for the remainder
 791  */
 792 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 793 {
 794         struct timeval lasttime;
 795         s32 delta, newdelta;
 796
 797         timeval_usec_add(waketime, add_usec);
 798
 799         do_gettimeofday(&lasttime);
 800         delta = timeval_usec_diff(lasttime, *waketime);
 801         if (delta > 2500) {
 802                 msleep((delta - 1500) / 1000);
 803                 do_gettimeofday(&lasttime);
 804                 newdelta = timeval_usec_diff(lasttime, *waketime);
 805                 delta = (newdelta > delta) ? 0 : newdelta;
 806         }
 807         if (delta > 0)
 808                 udelay(delta);
 809 }
 810 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 811
 812 static int dvb_frontend_start(struct dvb_frontend *fe)
 813 {
 814         int ret;
 815         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 816         struct task_struct *fe_thread;
 817
 818         dprintk ("%s\n", __func__);
 819
 820         if (fepriv->thread) {
 821                 if (fepriv->exit == DVB_FE_NO_EXIT)
 822                         return 0;
 823                 else
 824                         dvb_frontend_stop (fe);
 825         }
 826
 827         if (signal_pending(current))
 828                 return -EINTR;
 829         if (down_interruptible (&fepriv->sem))
 830                 return -EINTR;
 831
 832         fepriv->state = FESTATE_IDLE;
 833         fepriv->exit = DVB_FE_NO_EXIT;
 834         fepriv->thread = NULL;
 835         mb();
 836
 837         fe_thread = kthread_run(dvb_frontend_thread, fe,
 838                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 839         if (IS_ERR(fe_thread)) {
 840                 ret = PTR_ERR(fe_thread);
 841                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 842                 up(&fepriv->sem);
 843                 return ret;
 844         }
 845         fepriv->thread = fe_thread;
 846         return 0;
 847 }
 848
 849 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 850                                         u32 *freq_min, u32 *freq_max)
 851 {
 852         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 853
 854         if (fe->ops.info.frequency_max == 0)
 855                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 856         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 857                 *freq_max = fe->ops.info.frequency_max;
 858         else
 859                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 860
 861         if (*freq_min == 0 || *freq_max == 0)
 862                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 863                        fe->dvb->num,fe->id);
 864 }
 865
 866 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 867 {
 868         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 869         u32 freq_min;
 870         u32 freq_max;
 871
 872         /* range check: frequency */
 873         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 874         if ((freq_min && c->frequency < freq_min) ||
 875             (freq_max && c->frequency > freq_max)) {
 876                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 877                        fe->dvb->num, fe->id, c->frequency, freq_min, freq_max);
 878                 return -EINVAL;
 879         }
 880
 881         /* range check: symbol rate */
 882         switch (c->delivery_system) {
 883         case SYS_DVBS:
 884         case SYS_DVBS2:
 885         case SYS_TURBO:
 886         case SYS_DVBC_ANNEX_A:
 887         case SYS_DVBC_ANNEX_C:
 888                 if ((fe->ops.info.symbol_rate_min &&
 889                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 890                     (fe->ops.info.symbol_rate_max &&
 891                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 892                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 893                                fe->dvb->num, fe->id, c->symbol_rate,
 894                                fe->ops.info.symbol_rate_min,
 895                                fe->ops.info.symbol_rate_max);
 896                         return -EINVAL;
 897                 }
 898         default:
 899                 break;
 900         }
 901
 902         return 0;
 903 }
 904
 905 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 906 {
 907         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 908         int i;
 909         u32 delsys;
 910
 911         delsys = c->delivery_system;
 912         memset(c, 0, sizeof(struct dtv_frontend_properties));
 913         c->delivery_system = delsys;
 914
 915         c->state = DTV_CLEAR;
 916
 917         dprintk("%s() Clearing cache for delivery system %d\n", __func__,
 918                 c->delivery_system);
 919
 920         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 921         c->bandwidth_hz = 0;    /* AUTO */
 922         c->guard_interval = GUARD_INTERVAL_AUTO;
 923         c->hierarchy = HIERARCHY_AUTO;
 924         c->symbol_rate = 0;
 925         c->code_rate_HP = FEC_AUTO;
 926         c->code_rate_LP = FEC_AUTO;
 927         c->fec_inner = FEC_AUTO;
 928         c->rolloff = ROLLOFF_AUTO;
 929         c->voltage = SEC_VOLTAGE_OFF;
 930         c->sectone = SEC_TONE_OFF;
 931         c->pilot = PILOT_AUTO;
 932
 933         c->isdbt_partial_reception = 0;
 934         c->isdbt_sb_mode = 0;
 935         c->isdbt_sb_subchannel = 0;
 936         c->isdbt_sb_segment_idx = 0;
 937         c->isdbt_sb_segment_count = 0;
 938         c->isdbt_layer_enabled = 0;
 939         for (i = 0; i < 3; i++) {
 940                 c->layer[i].fec = FEC_AUTO;
 941                 c->layer[i].modulation = QAM_AUTO;
 942                 c->layer[i].interleaving = 0;
 943                 c->layer[i].segment_count = 0;
 944         }
 945
 946         c->isdbs_ts_id = 0;
 947         c->dvbt2_plp_id = 0;
 948
 949         switch (c->delivery_system) {
 950         case SYS_DVBS:
 951         case SYS_DVBS2:
 952         case SYS_TURBO:
 953                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 954                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 955                 break;
 956         case SYS_ATSC:
 957                 c->modulation = VSB_8;
 958                 break;
 959         default:
 960                 c->modulation = QAM_AUTO;
 961                 break;
 962         }
 963
 964         return 0;
 965 }
 966
 967 #define _DTV_CMD(n, s, b) \
 968 [n] = { \
 969         .name = #n, \
 970         .cmd  = n, \
 971         .set  = s,\
 972         .buffer = b \
 973 }
 974
 975 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 976         _DTV_CMD(DTV_TUNE, 1, 0),
 977         _DTV_CMD(DTV_CLEAR, 1, 0),
 978
 979         /* Set */
 980         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 981         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 982         _DTV_CMD(DTV_MODULATION, 1, 0),
 983         _DTV_CMD(DTV_INVERSION, 1, 0),
 984         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 985         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 986         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 987         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 988         _DTV_CMD(DTV_TONE, 1, 0),
 989         _DTV_CMD(DTV_PILOT, 1, 0),
 990         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 991         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 992         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 993         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 994         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 995         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 996         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
 997
 998         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
 999         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1000         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1001         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1002         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1003         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1004         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1005         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1006         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1007         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1008         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1009         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1010         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1011         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1012         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1013         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1014         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1015         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1016
1017         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
1018         _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
1019
1020         /* Get */
1021         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1022         _DTV_CMD(DTV_API_VERSION, 0, 0),
1023         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
1024         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
1025         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
1026         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
1027         _DTV_CMD(DTV_HIERARCHY, 0, 0),
1028
1029         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1030 };
1031
1032 static void dtv_property_dump(struct dtv_property *tvp)
1033 {
1034         int i;
1035
1036         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1037                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1038                         __func__, tvp->cmd);
1039                 return;
1040         }
1041
1042         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
1043                 ,__func__
1044                 ,tvp->cmd
1045                 ,dtv_cmds[ tvp->cmd ].name);
1046
1047         if(dtv_cmds[ tvp->cmd ].buffer) {
1048
1049                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1050                         ,__func__
1051                         ,tvp->u.buffer.len);
1052
1053                 for(i = 0; i < tvp->u.buffer.len; i++)
1054                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1055                                 ,__func__
1056                                 ,i
1057                                 ,tvp->u.buffer.data[i]);
1058
1059         } else
1060                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1061 }
1062
1063 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1064  * drivers can use a single set_frontend tuning function, regardless of whether
1065  * it's being used for the legacy or new API, reducing code and complexity.
1066  */
1067 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1068                                    struct dtv_frontend_properties *c,
1069                                    const struct dvb_frontend_parameters *p)
1070 {
1071         c->frequency = p->frequency;
1072         c->inversion = p->inversion;
1073
1074         switch (dvbv3_type(c->delivery_system)) {
1075         case DVBV3_QPSK:
1076                 dprintk("%s() Preparing QPSK req\n", __func__);
1077                 c->symbol_rate = p->u.qpsk.symbol_rate;
1078                 c->fec_inner = p->u.qpsk.fec_inner;
1079                 break;
1080         case DVBV3_QAM:
1081                 dprintk("%s() Preparing QAM req\n", __func__);
1082                 c->symbol_rate = p->u.qam.symbol_rate;
1083                 c->fec_inner = p->u.qam.fec_inner;
1084                 c->modulation = p->u.qam.modulation;
1085                 break;
1086         case DVBV3_OFDM:
1087                 dprintk("%s() Preparing OFDM req\n", __func__);
1088                 switch (p->u.ofdm.bandwidth) {
1089                 case BANDWIDTH_10_MHZ:
1090                         c->bandwidth_hz = 10000000;
1091                         break;
1092                 case BANDWIDTH_8_MHZ:
1093                         c->bandwidth_hz = 8000000;
1094                         break;
1095                 case BANDWIDTH_7_MHZ:
1096                         c->bandwidth_hz = 7000000;
1097                         break;
1098                 case BANDWIDTH_6_MHZ:
1099                         c->bandwidth_hz = 6000000;
1100                         break;
1101                 case BANDWIDTH_5_MHZ:
1102                         c->bandwidth_hz = 5000000;
1103                         break;
1104                 case BANDWIDTH_1_712_MHZ:
1105                         c->bandwidth_hz = 1712000;
1106                         break;
1107                 case BANDWIDTH_AUTO:
1108                         c->bandwidth_hz = 0;
1109                 }
1110
1111                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1112                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1113                 c->modulation = p->u.ofdm.constellation;
1114                 c->transmission_mode = p->u.ofdm.transmission_mode;
1115                 c->guard_interval = p->u.ofdm.guard_interval;
1116                 c->hierarchy = p->u.ofdm.hierarchy_information;
1117                 break;
1118         case DVBV3_ATSC:
1119                 dprintk("%s() Preparing ATSC req\n", __func__);
1120                 c->modulation = p->u.vsb.modulation;
1121                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1122                         c->delivery_system = SYS_ATSC;
1123                 else
1124                         c->delivery_system = SYS_DVBC_ANNEX_B;
1125                 break;
1126         case DVBV3_UNKNOWN:
1127                 printk(KERN_ERR
1128                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1129                        __func__, c->delivery_system);
1130                 return -EINVAL;
1131         }
1132
1133         return 0;
1134 }
1135
1136 /* Ensure the cached values are set correctly in the frontend
1137  * legacy tuning structures, for the advanced tuning API.
1138  */
1139 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1140                                             struct dvb_frontend_parameters *p)
1141 {
1142         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1143
1144         p->frequency = c->frequency;
1145         p->inversion = c->inversion;
1146
1147         switch (dvbv3_type(c->delivery_system)) {
1148         case DVBV3_UNKNOWN:
1149                 printk(KERN_ERR
1150                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1151                        __func__, c->delivery_system);
1152                 return -EINVAL;
1153         case DVBV3_QPSK:
1154                 dprintk("%s() Preparing QPSK req\n", __func__);
1155                 p->u.qpsk.symbol_rate = c->symbol_rate;
1156                 p->u.qpsk.fec_inner = c->fec_inner;
1157                 break;
1158         case DVBV3_QAM:
1159                 dprintk("%s() Preparing QAM req\n", __func__);
1160                 p->u.qam.symbol_rate = c->symbol_rate;
1161                 p->u.qam.fec_inner = c->fec_inner;
1162                 p->u.qam.modulation = c->modulation;
1163                 break;
1164         case DVBV3_OFDM:
1165                 dprintk("%s() Preparing OFDM req\n", __func__);
1166
1167                 switch (c->bandwidth_hz) {
1168                 case 10000000:
1169                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1170                         break;
1171                 case 8000000:
1172                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1173                         break;
1174                 case 7000000:
1175                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1176                         break;
1177                 case 6000000:
1178                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1179                         break;
1180                 case 5000000:
1181                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1182                         break;
1183                 case 1712000:
1184                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1185                         break;
1186                 case 0:
1187                 default:
1188                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1189                 }
1190                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1191                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1192                 p->u.ofdm.constellation = c->modulation;
1193                 p->u.ofdm.transmission_mode = c->transmission_mode;
1194                 p->u.ofdm.guard_interval = c->guard_interval;
1195                 p->u.ofdm.hierarchy_information = c->hierarchy;
1196                 break;
1197         case DVBV3_ATSC:
1198                 dprintk("%s() Preparing VSB req\n", __func__);
1199                 p->u.vsb.modulation = c->modulation;
1200                 break;
1201         }
1202         return 0;
1203 }
1204
1205 /**
1206  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1207  * @fe:         struct dvb_frontend pointer
1208  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1209  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1210  *
1211  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1212  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1213  * If p_out is not null, it will update the DVBv3 params pointed by it.
1214  */
1215 static int dtv_get_frontend(struct dvb_frontend *fe,
1216                             struct dvb_frontend_parameters *p_out)
1217 {
1218         int r;
1219
1220         if (fe->ops.get_frontend) {
1221                 r = fe->ops.get_frontend(fe);
1222                 if (unlikely(r < 0))
1223                         return r;
1224                 if (p_out)
1225                         dtv_property_legacy_params_sync(fe, p_out);
1226                 return 0;
1227         }
1228
1229         /* As everything is in cache, get_frontend fops are always supported */
1230         return 0;
1231 }
1232
1233 static int dvb_frontend_ioctl_legacy(struct file *file,
1234                         unsigned int cmd, void *parg);
1235 static int dvb_frontend_ioctl_properties(struct file *file,
1236                         unsigned int cmd, void *parg);
1237
1238 static int dtv_property_process_get(struct dvb_frontend *fe,
1239                                     const struct dtv_frontend_properties *c,
1240                                     struct dtv_property *tvp,
1241                                     struct file *file)
1242 {
1243         int r, ncaps;
1244
1245         switch(tvp->cmd) {
1246         case DTV_ENUM_DELSYS:
1247                 ncaps = 0;
1248                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1249                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1250                         ncaps++;
1251                 }
1252                 tvp->u.buffer.len = ncaps;
1253                 break;
1254         case DTV_FREQUENCY:
1255                 tvp->u.data = c->frequency;
1256                 break;
1257         case DTV_MODULATION:
1258                 tvp->u.data = c->modulation;
1259                 break;
1260         case DTV_BANDWIDTH_HZ:
1261                 tvp->u.data = c->bandwidth_hz;
1262                 break;
1263         case DTV_INVERSION:
1264                 tvp->u.data = c->inversion;
1265                 break;
1266         case DTV_SYMBOL_RATE:
1267                 tvp->u.data = c->symbol_rate;
1268                 break;
1269         case DTV_INNER_FEC:
1270                 tvp->u.data = c->fec_inner;
1271                 break;
1272         case DTV_PILOT:
1273                 tvp->u.data = c->pilot;
1274                 break;
1275         case DTV_ROLLOFF:
1276                 tvp->u.data = c->rolloff;
1277                 break;
1278         case DTV_DELIVERY_SYSTEM:
1279                 tvp->u.data = c->delivery_system;
1280                 break;
1281         case DTV_VOLTAGE:
1282                 tvp->u.data = c->voltage;
1283                 break;
1284         case DTV_TONE:
1285                 tvp->u.data = c->sectone;
1286                 break;
1287         case DTV_API_VERSION:
1288                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1289                 break;
1290         case DTV_CODE_RATE_HP:
1291                 tvp->u.data = c->code_rate_HP;
1292                 break;
1293         case DTV_CODE_RATE_LP:
1294                 tvp->u.data = c->code_rate_LP;
1295                 break;
1296         case DTV_GUARD_INTERVAL:
1297                 tvp->u.data = c->guard_interval;
1298                 break;
1299         case DTV_TRANSMISSION_MODE:
1300                 tvp->u.data = c->transmission_mode;
1301                 break;
1302         case DTV_HIERARCHY:
1303                 tvp->u.data = c->hierarchy;
1304                 break;
1305
1306         /* ISDB-T Support here */
1307         case DTV_ISDBT_PARTIAL_RECEPTION:
1308                 tvp->u.data = c->isdbt_partial_reception;
1309                 break;
1310         case DTV_ISDBT_SOUND_BROADCASTING:
1311                 tvp->u.data = c->isdbt_sb_mode;
1312                 break;
1313         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1314                 tvp->u.data = c->isdbt_sb_subchannel;
1315                 break;
1316         case DTV_ISDBT_SB_SEGMENT_IDX:
1317                 tvp->u.data = c->isdbt_sb_segment_idx;
1318                 break;
1319         case DTV_ISDBT_SB_SEGMENT_COUNT:
1320                 tvp->u.data = c->isdbt_sb_segment_count;
1321                 break;
1322         case DTV_ISDBT_LAYER_ENABLED:
1323                 tvp->u.data = c->isdbt_layer_enabled;
1324                 break;
1325         case DTV_ISDBT_LAYERA_FEC:
1326                 tvp->u.data = c->layer[0].fec;
1327                 break;
1328         case DTV_ISDBT_LAYERA_MODULATION:
1329                 tvp->u.data = c->layer[0].modulation;
1330                 break;
1331         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1332                 tvp->u.data = c->layer[0].segment_count;
1333                 break;
1334         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1335                 tvp->u.data = c->layer[0].interleaving;
1336                 break;
1337         case DTV_ISDBT_LAYERB_FEC:
1338                 tvp->u.data = c->layer[1].fec;
1339                 break;
1340         case DTV_ISDBT_LAYERB_MODULATION:
1341                 tvp->u.data = c->layer[1].modulation;
1342                 break;
1343         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1344                 tvp->u.data = c->layer[1].segment_count;
1345                 break;
1346         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1347                 tvp->u.data = c->layer[1].interleaving;
1348                 break;
1349         case DTV_ISDBT_LAYERC_FEC:
1350                 tvp->u.data = c->layer[2].fec;
1351                 break;
1352         case DTV_ISDBT_LAYERC_MODULATION:
1353                 tvp->u.data = c->layer[2].modulation;
1354                 break;
1355         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1356                 tvp->u.data = c->layer[2].segment_count;
1357                 break;
1358         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1359                 tvp->u.data = c->layer[2].interleaving;
1360                 break;
1361         case DTV_ISDBS_TS_ID:
1362                 tvp->u.data = c->isdbs_ts_id;
1363                 break;
1364         case DTV_DVBT2_PLP_ID:
1365                 tvp->u.data = c->dvbt2_plp_id;
1366                 break;
1367         default:
1368                 return -EINVAL;
1369         }
1370
1371         /* Allow the frontend to override outgoing properties */
1372         if (fe->ops.get_property) {
1373                 r = fe->ops.get_property(fe, tvp);
1374                 if (r < 0)
1375                         return r;
1376         }
1377
1378         dtv_property_dump(tvp);
1379
1380         return 0;
1381 }
1382
1383 static int dtv_set_frontend(struct dvb_frontend *fe);
1384
1385 static bool is_dvbv3_delsys(u32 delsys)
1386 {
1387         bool status;
1388
1389         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1390                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1391
1392         return status;
1393 }
1394
1395 static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system)
1396 {
1397         int ncaps, i;
1398         u32 delsys = SYS_UNDEFINED;
1399         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1400         enum dvbv3_emulation_type type;
1401
1402         /*
1403          * It was reported that some old DVBv5 applications were
1404          * filling delivery_system with SYS_UNDEFINED. If this happens,
1405          * assume that the application wants to use the first supported
1406          * delivery system.
1407          */
1408         if (c->delivery_system == SYS_UNDEFINED)
1409                 c->delivery_system = fe->ops.delsys[0];
1410
1411         if (desired_system == SYS_UNDEFINED) {
1412                 /*
1413                  * A DVBv3 call doesn't know what's the desired system.
1414                  * Also, DVBv3 applications don't know that ops.info->type
1415                  * could be changed, and they simply dies when it doesn't
1416                  * match.
1417                  * So, don't change the current delivery system, as it
1418                  * may be trying to do the wrong thing, like setting an
1419                  * ISDB-T frontend as DVB-T. Instead, find the closest
1420                  * DVBv3 system that matches the delivery system.
1421                  */
1422                 if (is_dvbv3_delsys(c->delivery_system)) {
1423                         dprintk("%s() Using delivery system to %d\n",
1424                                 __func__, c->delivery_system);
1425                         return 0;
1426                 }
1427                 type = dvbv3_type(c->delivery_system);
1428                 switch (type) {
1429                 case DVBV3_QPSK:
1430                         desired_system = SYS_DVBS;
1431                         break;
1432                 case DVBV3_QAM:
1433                         desired_system = SYS_DVBC_ANNEX_A;
1434                         break;
1435                 case DVBV3_ATSC:
1436                         desired_system = SYS_ATSC;
1437                         break;
1438                 case DVBV3_OFDM:
1439                         desired_system = SYS_DVBT;
1440                         break;
1441                 default:
1442                         dprintk("%s(): This frontend doesn't support DVBv3 calls\n",
1443                                 __func__);
1444                         return -EINVAL;
1445                 }
1446         } else {
1447                 /*
1448                  * This is a DVBv5 call. So, it likely knows the supported
1449                  * delivery systems.
1450                  */
1451
1452                 /* Check if the desired delivery system is supported */
1453                 ncaps = 0;
1454                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1455                         if (fe->ops.delsys[ncaps] == desired_system) {
1456                                 c->delivery_system = desired_system;
1457                                 dprintk("%s() Changing delivery system to %d\n",
1458                                         __func__, desired_system);
1459                                 return 0;
1460                         }
1461                         ncaps++;
1462                 }
1463                 type = dvbv3_type(desired_system);
1464
1465                 /*
1466                  * The delivery system is not supported. See if it can be
1467                  * emulated.
1468                  * The emulation only works if the desired system is one of the
1469                  * DVBv3 delivery systems
1470                  */
1471                 if (!is_dvbv3_delsys(desired_system)) {
1472                         dprintk("%s() can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n",
1473                                 __func__);
1474                         return -EINVAL;
1475                 }
1476
1477                 /*
1478                  * Get the last non-DVBv3 delivery system that has the same type
1479                  * of the desired system
1480                  */
1481                 ncaps = 0;
1482                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1483                         if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) &&
1484                             !is_dvbv3_delsys(fe->ops.delsys[ncaps]))
1485                                 delsys = fe->ops.delsys[ncaps];
1486                         ncaps++;
1487                 }
1488                 /* There's nothing compatible with the desired delivery system */
1489                 if (delsys == SYS_UNDEFINED) {
1490                         dprintk("%s() Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n",
1491                                 __func__);
1492                         return -EINVAL;
1493                 }
1494                 c->delivery_system = delsys;
1495         }
1496
1497         /*
1498          * The DVBv3 or DVBv5 call is requesting a different system. So,
1499          * emulation is needed.
1500          *
1501          * Emulate newer delivery systems like ISDBT, DVBT and DMBTH
1502          * for older DVBv5 applications. The emulation will try to use
1503          * the auto mode for most things, and will assume that the desired
1504          * delivery system is the last one at the ops.delsys[] array
1505          */
1506         dprintk("%s() Using delivery system %d emulated as if it were a %d\n",
1507                 __func__, delsys, desired_system);
1508
1509         /*
1510          * For now, handles ISDB-T calls. More code may be needed here for the
1511          * other emulated stuff
1512          */
1513         if (type == DVBV3_OFDM) {
1514                 if (c->delivery_system == SYS_ISDBT) {
1515                         dprintk("%s() Using defaults for SYS_ISDBT\n",
1516                                 __func__);
1517                         if (!c->bandwidth_hz)
1518                                 c->bandwidth_hz = 6000000;
1519
1520                         c->isdbt_partial_reception = 0;
1521                         c->isdbt_sb_mode = 0;
1522                         c->isdbt_sb_subchannel = 0;
1523                         c->isdbt_sb_segment_idx = 0;
1524                         c->isdbt_sb_segment_count = 0;
1525                         c->isdbt_layer_enabled = 0;
1526                         for (i = 0; i < 3; i++) {
1527                                 c->layer[i].fec = FEC_AUTO;
1528                                 c->layer[i].modulation = QAM_AUTO;
1529                                 c->layer[i].interleaving = 0;
1530                                 c->layer[i].segment_count = 0;
1531                         }
1532                 }
1533         }
1534         dprintk("change delivery system on cache to %d\n", c->delivery_system);
1535
1536         return 0;
1537 }
1538
1539 static int dtv_property_process_set(struct dvb_frontend *fe,
1540                                     struct dtv_property *tvp,
1541                                     struct file *file)
1542 {
1543         int r = 0;
1544         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1545
1546         /* Allow the frontend to validate incoming properties */
1547         if (fe->ops.set_property) {
1548                 r = fe->ops.set_property(fe, tvp);
1549                 if (r < 0)
1550                         return r;
1551         }
1552
1553         switch(tvp->cmd) {
1554         case DTV_CLEAR:
1555                 /*
1556                  * Reset a cache of data specific to the frontend here. This does
1557                  * not effect hardware.
1558                  */
1559                 dvb_frontend_clear_cache(fe);
1560                 break;
1561         case DTV_TUNE:
1562                 /* interpret the cache of data, build either a traditional frontend
1563                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1564                  * ioctl.
1565                  */
1566                 c->state = tvp->cmd;
1567                 dprintk("%s() Finalised property cache\n", __func__);
1568
1569                 r = dtv_set_frontend(fe);
1570                 break;
1571         case DTV_FREQUENCY:
1572                 c->frequency = tvp->u.data;
1573                 break;
1574         case DTV_MODULATION:
1575                 c->modulation = tvp->u.data;
1576                 break;
1577         case DTV_BANDWIDTH_HZ:
1578                 c->bandwidth_hz = tvp->u.data;
1579                 break;
1580         case DTV_INVERSION:
1581                 c->inversion = tvp->u.data;
1582                 break;
1583         case DTV_SYMBOL_RATE:
1584                 c->symbol_rate = tvp->u.data;
1585                 break;
1586         case DTV_INNER_FEC:
1587                 c->fec_inner = tvp->u.data;
1588                 break;
1589         case DTV_PILOT:
1590                 c->pilot = tvp->u.data;
1591                 break;
1592         case DTV_ROLLOFF:
1593                 c->rolloff = tvp->u.data;
1594                 break;
1595         case DTV_DELIVERY_SYSTEM:
1596                 r = set_delivery_system(fe, tvp->u.data);
1597                 break;
1598         case DTV_VOLTAGE:
1599                 c->voltage = tvp->u.data;
1600                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1601                         (void *)c->voltage);
1602                 break;
1603         case DTV_TONE:
1604                 c->sectone = tvp->u.data;
1605                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1606                         (void *)c->sectone);
1607                 break;
1608         case DTV_CODE_RATE_HP:
1609                 c->code_rate_HP = tvp->u.data;
1610                 break;
1611         case DTV_CODE_RATE_LP:
1612                 c->code_rate_LP = tvp->u.data;
1613                 break;
1614         case DTV_GUARD_INTERVAL:
1615                 c->guard_interval = tvp->u.data;
1616                 break;
1617         case DTV_TRANSMISSION_MODE:
1618                 c->transmission_mode = tvp->u.data;
1619                 break;
1620         case DTV_HIERARCHY:
1621                 c->hierarchy = tvp->u.data;
1622                 break;
1623
1624         /* ISDB-T Support here */
1625         case DTV_ISDBT_PARTIAL_RECEPTION:
1626                 c->isdbt_partial_reception = tvp->u.data;
1627                 break;
1628         case DTV_ISDBT_SOUND_BROADCASTING:
1629                 c->isdbt_sb_mode = tvp->u.data;
1630                 break;
1631         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1632                 c->isdbt_sb_subchannel = tvp->u.data;
1633                 break;
1634         case DTV_ISDBT_SB_SEGMENT_IDX:
1635                 c->isdbt_sb_segment_idx = tvp->u.data;
1636                 break;
1637         case DTV_ISDBT_SB_SEGMENT_COUNT:
1638                 c->isdbt_sb_segment_count = tvp->u.data;
1639                 break;
1640         case DTV_ISDBT_LAYER_ENABLED:
1641                 c->isdbt_layer_enabled = tvp->u.data;
1642                 break;
1643         case DTV_ISDBT_LAYERA_FEC:
1644                 c->layer[0].fec = tvp->u.data;
1645                 break;
1646         case DTV_ISDBT_LAYERA_MODULATION:
1647                 c->layer[0].modulation = tvp->u.data;
1648                 break;
1649         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1650                 c->layer[0].segment_count = tvp->u.data;
1651                 break;
1652         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1653                 c->layer[0].interleaving = tvp->u.data;
1654                 break;
1655         case DTV_ISDBT_LAYERB_FEC:
1656                 c->layer[1].fec = tvp->u.data;
1657                 break;
1658         case DTV_ISDBT_LAYERB_MODULATION:
1659                 c->layer[1].modulation = tvp->u.data;
1660                 break;
1661         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1662                 c->layer[1].segment_count = tvp->u.data;
1663                 break;
1664         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1665                 c->layer[1].interleaving = tvp->u.data;
1666                 break;
1667         case DTV_ISDBT_LAYERC_FEC:
1668                 c->layer[2].fec = tvp->u.data;
1669                 break;
1670         case DTV_ISDBT_LAYERC_MODULATION:
1671                 c->layer[2].modulation = tvp->u.data;
1672                 break;
1673         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1674                 c->layer[2].segment_count = tvp->u.data;
1675                 break;
1676         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1677                 c->layer[2].interleaving = tvp->u.data;
1678                 break;
1679         case DTV_ISDBS_TS_ID:
1680                 c->isdbs_ts_id = tvp->u.data;
1681                 break;
1682         case DTV_DVBT2_PLP_ID:
1683                 c->dvbt2_plp_id = tvp->u.data;
1684                 break;
1685         default:
1686                 return -EINVAL;
1687         }
1688
1689         return r;
1690 }
1691
1692 static int dvb_frontend_ioctl(struct file *file,
1693                         unsigned int cmd, void *parg)
1694 {
1695         struct dvb_device *dvbdev = file->private_data;
1696         struct dvb_frontend *fe = dvbdev->priv;
1697         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1698         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1699         int err = -EOPNOTSUPP;
1700
1701         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1702
1703         if (fepriv->exit != DVB_FE_NO_EXIT)
1704                 return -ENODEV;
1705
1706         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1707             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1708              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1709                 return -EPERM;
1710
1711         if (down_interruptible (&fepriv->sem))
1712                 return -ERESTARTSYS;
1713
1714         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1715                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1716         else {
1717                 c->state = DTV_UNDEFINED;
1718                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1719         }
1720
1721         up(&fepriv->sem);
1722         return err;
1723 }
1724
1725 static int dvb_frontend_ioctl_properties(struct file *file,
1726                         unsigned int cmd, void *parg)
1727 {
1728         struct dvb_device *dvbdev = file->private_data;
1729         struct dvb_frontend *fe = dvbdev->priv;
1730         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1731         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1732         int err = 0;
1733
1734         struct dtv_properties *tvps = NULL;
1735         struct dtv_property *tvp = NULL;
1736         int i;
1737
1738         dprintk("%s\n", __func__);
1739
1740         if(cmd == FE_SET_PROPERTY) {
1741                 tvps = (struct dtv_properties __user *)parg;
1742
1743                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1744                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1745
1746                 /* Put an arbitrary limit on the number of messages that can
1747                  * be sent at once */
1748                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1749                         return -EINVAL;
1750
1751                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1752                 if (!tvp) {
1753                         err = -ENOMEM;
1754                         goto out;
1755                 }
1756
1757                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1758                         err = -EFAULT;
1759                         goto out;
1760                 }
1761
1762                 for (i = 0; i < tvps->num; i++) {
1763                         err = dtv_property_process_set(fe, tvp + i, file);
1764                         if (err < 0)
1765                                 goto out;
1766                         (tvp + i)->result = err;
1767                 }
1768
1769                 if (c->state == DTV_TUNE)
1770                         dprintk("%s() Property cache is full, tuning\n", __func__);
1771
1772         } else
1773         if(cmd == FE_GET_PROPERTY) {
1774                 tvps = (struct dtv_properties __user *)parg;
1775
1776                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1777                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1778
1779                 /* Put an arbitrary limit on the number of messages that can
1780                  * be sent at once */
1781                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1782                         return -EINVAL;
1783
1784                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1785                 if (!tvp) {
1786                         err = -ENOMEM;
1787                         goto out;
1788                 }
1789
1790                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1791                         err = -EFAULT;
1792                         goto out;
1793                 }
1794
1795                 /*
1796                  * Fills the cache out struct with the cache contents, plus
1797                  * the data retrieved from get_frontend, if the frontend
1798                  * is not idle. Otherwise, returns the cached content
1799                  */
1800                 if (fepriv->state != FESTATE_IDLE) {
1801                         err = dtv_get_frontend(fe, NULL);
1802                         if (err < 0)
1803                                 goto out;
1804                 }
1805                 for (i = 0; i < tvps->num; i++) {
1806                         err = dtv_property_process_get(fe, c, tvp + i, file);
1807                         if (err < 0)
1808                                 goto out;
1809                         (tvp + i)->result = err;
1810                 }
1811
1812                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1813                         err = -EFAULT;
1814                         goto out;
1815                 }
1816
1817         } else
1818                 err = -EOPNOTSUPP;
1819
1820 out:
1821         kfree(tvp);
1822         return err;
1823 }
1824
1825 static int dtv_set_frontend(struct dvb_frontend *fe)
1826 {
1827         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1828         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1829         struct dvb_frontend_tune_settings fetunesettings;
1830         u32 rolloff = 0;
1831
1832         if (dvb_frontend_check_parameters(fe) < 0)
1833                 return -EINVAL;
1834
1835         /*
1836          * Be sure that the bandwidth will be filled for all
1837          * non-satellite systems, as tuners need to know what
1838          * low pass/Nyquist half filter should be applied, in
1839          * order to avoid inter-channel noise.
1840          *
1841          * ISDB-T and DVB-T/T2 already sets bandwidth.
1842          * ATSC and DVB-C don't set, so, the core should fill it.
1843          *
1844          * On DVB-C Annex A and C, the bandwidth is a function of
1845          * the roll-off and symbol rate. Annex B defines different
1846          * roll-off factors depending on the modulation. Fortunately,
1847          * Annex B is only used with 6MHz, so there's no need to
1848          * calculate it.
1849          *
1850          * While not officially supported, a side effect of handling it at
1851          * the cache level is that a program could retrieve the bandwidth
1852          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1853          */
1854         switch (c->delivery_system) {
1855         case SYS_ATSC:
1856         case SYS_DVBC_ANNEX_B:
1857                 c->bandwidth_hz = 6000000;
1858                 break;
1859         case SYS_DVBC_ANNEX_A:
1860                 rolloff = 115;
1861                 break;
1862         case SYS_DVBC_ANNEX_C:
1863                 rolloff = 113;
1864                 break;
1865         default:
1866                 break;
1867         }
1868         if (rolloff)
1869                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
1870
1871         /* force auto frequency inversion if requested */
1872         if (dvb_force_auto_inversion)
1873                 c->inversion = INVERSION_AUTO;
1874
1875         /*
1876          * without hierarchical coding code_rate_LP is irrelevant,
1877          * so we tolerate the otherwise invalid FEC_NONE setting
1878          */
1879         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
1880                 c->code_rate_LP = FEC_AUTO;
1881
1882         /* get frontend-specific tuning settings */
1883         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1884         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1885                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1886                 fepriv->max_drift = fetunesettings.max_drift;
1887                 fepriv->step_size = fetunesettings.step_size;
1888         } else {
1889                 /* default values */
1890                 switch (c->delivery_system) {
1891                 case SYS_DVBC_ANNEX_A:
1892                 case SYS_DVBC_ANNEX_C:
1893                         fepriv->min_delay = HZ / 20;
1894                         fepriv->step_size = c->symbol_rate / 16000;
1895                         fepriv->max_drift = c->symbol_rate / 2000;
1896                         break;
1897                 case SYS_DVBT:
1898                 case SYS_DVBT2:
1899                 case SYS_ISDBT:
1900                 case SYS_DMBTH:
1901                         fepriv->min_delay = HZ / 20;
1902                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1903                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1904                         break;
1905                 default:
1906                         /*
1907                          * FIXME: This sounds wrong! if freqency_stepsize is
1908                          * defined by the frontend, why not use it???
1909                          */
1910                         fepriv->min_delay = HZ / 20;
1911                         fepriv->step_size = 0; /* no zigzag */
1912                         fepriv->max_drift = 0;
1913                         break;
1914                 }
1915         }
1916         if (dvb_override_tune_delay > 0)
1917                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1918
1919         fepriv->state = FESTATE_RETUNE;
1920
1921         /* Request the search algorithm to search */
1922         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1923
1924         dvb_frontend_clear_events(fe);
1925         dvb_frontend_add_event(fe, 0);
1926         dvb_frontend_wakeup(fe);
1927         fepriv->status = 0;
1928
1929         return 0;
1930 }
1931
1932
1933 static int dvb_frontend_ioctl_legacy(struct file *file,
1934                         unsigned int cmd, void *parg)
1935 {
1936         struct dvb_device *dvbdev = file->private_data;
1937         struct dvb_frontend *fe = dvbdev->priv;
1938         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1939         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1940         int cb_err, err = -EOPNOTSUPP;
1941
1942         if (fe->dvb->fe_ioctl_override) {
1943                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1944                                                     DVB_FE_IOCTL_PRE);
1945                 if (cb_err < 0)
1946                         return cb_err;
1947                 if (cb_err > 0)
1948                         return 0;
1949                 /* fe_ioctl_override returning 0 allows
1950                  * dvb-core to continue handling the ioctl */
1951         }
1952
1953         switch (cmd) {
1954         case FE_GET_INFO: {
1955                 struct dvb_frontend_info* info = parg;
1956
1957                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1958                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1959
1960                 /*
1961                  * Associate the 4 delivery systems supported by DVBv3
1962                  * API with their DVBv5 counterpart. For the other standards,
1963                  * use the closest type, assuming that it would hopefully
1964                  * work with a DVBv3 application.
1965                  * It should be noticed that, on multi-frontend devices with
1966                  * different types (terrestrial and cable, for example),
1967                  * a pure DVBv3 application won't be able to use all delivery
1968                  * systems. Yet, changing the DVBv5 cache to the other delivery
1969                  * system should be enough for making it work.
1970                  */
1971                 switch (dvbv3_type(c->delivery_system)) {
1972                 case DVBV3_QPSK:
1973                         info->type = FE_QPSK;
1974                         break;
1975                 case DVBV3_ATSC:
1976                         info->type = FE_ATSC;
1977                         break;
1978                 case DVBV3_QAM:
1979                         info->type = FE_QAM;
1980                         break;
1981                 case DVBV3_OFDM:
1982                         info->type = FE_OFDM;
1983                         break;
1984                 default:
1985                         printk(KERN_ERR
1986                                "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1987                                __func__, c->delivery_system);
1988                         fe->ops.info.type = FE_OFDM;
1989                 }
1990                 dprintk("current delivery system on cache: %d, V3 type: %d\n",
1991                         c->delivery_system, fe->ops.info.type);
1992
1993                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1994                  * do it, it is done for it. */
1995                 info->caps |= FE_CAN_INVERSION_AUTO;
1996                 err = 0;
1997                 break;
1998         }
1999
2000         case FE_READ_STATUS: {
2001                 fe_status_t* status = parg;
2002
2003                 /* if retune was requested but hasn't occurred yet, prevent
2004                  * that user get signal state from previous tuning */
2005                 if (fepriv->state == FESTATE_RETUNE ||
2006                     fepriv->state == FESTATE_ERROR) {
2007                         err=0;
2008                         *status = 0;
2009                         break;
2010                 }
2011
2012                 if (fe->ops.read_status)
2013                         err = fe->ops.read_status(fe, status);
2014                 break;
2015         }
2016         case FE_READ_BER:
2017                 if (fe->ops.read_ber)
2018                         err = fe->ops.read_ber(fe, (__u32*) parg);
2019                 break;
2020
2021         case FE_READ_SIGNAL_STRENGTH:
2022                 if (fe->ops.read_signal_strength)
2023                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
2024                 break;
2025
2026         case FE_READ_SNR:
2027                 if (fe->ops.read_snr)
2028                         err = fe->ops.read_snr(fe, (__u16*) parg);
2029                 break;
2030
2031         case FE_READ_UNCORRECTED_BLOCKS:
2032                 if (fe->ops.read_ucblocks)
2033                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
2034                 break;
2035
2036
2037         case FE_DISEQC_RESET_OVERLOAD:
2038                 if (fe->ops.diseqc_reset_overload) {
2039                         err = fe->ops.diseqc_reset_overload(fe);
2040                         fepriv->state = FESTATE_DISEQC;
2041                         fepriv->status = 0;
2042                 }
2043                 break;
2044
2045         case FE_DISEQC_SEND_MASTER_CMD:
2046                 if (fe->ops.diseqc_send_master_cmd) {
2047                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2048                         fepriv->state = FESTATE_DISEQC;
2049                         fepriv->status = 0;
2050                 }
2051                 break;
2052
2053         case FE_DISEQC_SEND_BURST:
2054                 if (fe->ops.diseqc_send_burst) {
2055                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2056                         fepriv->state = FESTATE_DISEQC;
2057                         fepriv->status = 0;
2058                 }
2059                 break;
2060
2061         case FE_SET_TONE:
2062                 if (fe->ops.set_tone) {
2063                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2064                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2065                         fepriv->state = FESTATE_DISEQC;
2066                         fepriv->status = 0;
2067                 }
2068                 break;
2069
2070         case FE_SET_VOLTAGE:
2071                 if (fe->ops.set_voltage) {
2072                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2073                         fepriv->voltage = (fe_sec_voltage_t) parg;
2074                         fepriv->state = FESTATE_DISEQC;
2075                         fepriv->status = 0;
2076                 }
2077                 break;
2078
2079         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2080                 if (fe->ops.dishnetwork_send_legacy_command) {
2081                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2082                         fepriv->state = FESTATE_DISEQC;
2083                         fepriv->status = 0;
2084                 } else if (fe->ops.set_voltage) {
2085                         /*
2086                          * NOTE: This is a fallback condition.  Some frontends
2087                          * (stv0299 for instance) take longer than 8msec to
2088                          * respond to a set_voltage command.  Those switches
2089                          * need custom routines to switch properly.  For all
2090                          * other frontends, the following should work ok.
2091                          * Dish network legacy switches (as used by Dish500)
2092                          * are controlled by sending 9-bit command words
2093                          * spaced 8msec apart.
2094                          * the actual command word is switch/port dependent
2095                          * so it is up to the userspace application to send
2096                          * the right command.
2097                          * The command must always start with a '0' after
2098                          * initialization, so parg is 8 bits and does not
2099                          * include the initialization or start bit
2100                          */
2101                         unsigned long swcmd = ((unsigned long) parg) << 1;
2102                         struct timeval nexttime;
2103                         struct timeval tv[10];
2104                         int i;
2105                         u8 last = 1;
2106                         if (dvb_frontend_debug)
2107                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2108                         do_gettimeofday(&nexttime);
2109                         if (dvb_frontend_debug)
2110                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
2111                         /* before sending a command, initialize by sending
2112                          * a 32ms 18V to the switch
2113                          */
2114                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2115                         dvb_frontend_sleep_until(&nexttime, 32000);
2116
2117                         for (i = 0; i < 9; i++) {
2118                                 if (dvb_frontend_debug)
2119                                         do_gettimeofday(&tv[i + 1]);
2120                                 if ((swcmd & 0x01) != last) {
2121                                         /* set voltage to (last ? 13V : 18V) */
2122                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2123                                         last = (last) ? 0 : 1;
2124                                 }
2125                                 swcmd = swcmd >> 1;
2126                                 if (i != 8)
2127                                         dvb_frontend_sleep_until(&nexttime, 8000);
2128                         }
2129                         if (dvb_frontend_debug) {
2130                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2131                                         __func__, fe->dvb->num);
2132                                 for (i = 1; i < 10; i++)
2133                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2134                         }
2135                         err = 0;
2136                         fepriv->state = FESTATE_DISEQC;
2137                         fepriv->status = 0;
2138                 }
2139                 break;
2140
2141         case FE_DISEQC_RECV_SLAVE_REPLY:
2142                 if (fe->ops.diseqc_recv_slave_reply)
2143                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2144                 break;
2145
2146         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2147                 if (fe->ops.enable_high_lnb_voltage)
2148                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2149                 break;
2150
2151         case FE_SET_FRONTEND:
2152                 err = set_delivery_system(fe, SYS_UNDEFINED);
2153                 if (err)
2154                         break;
2155
2156                 err = dtv_property_cache_sync(fe, c, parg);
2157                 if (err)
2158                         break;
2159                 err = dtv_set_frontend(fe);
2160                 break;
2161         case FE_GET_EVENT:
2162                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2163                 break;
2164
2165         case FE_GET_FRONTEND:
2166                 err = dtv_get_frontend(fe, parg);
2167                 break;
2168
2169         case FE_SET_FRONTEND_TUNE_MODE:
2170                 fepriv->tune_mode_flags = (unsigned long) parg;
2171                 err = 0;
2172                 break;
2173         };
2174
2175         if (fe->dvb->fe_ioctl_override) {
2176                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
2177                                                     DVB_FE_IOCTL_POST);
2178                 if (cb_err < 0)
2179                         return cb_err;
2180         }
2181
2182         return err;
2183 }
2184
2185
2186 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2187 {
2188         struct dvb_device *dvbdev = file->private_data;
2189         struct dvb_frontend *fe = dvbdev->priv;
2190         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2191
2192         dprintk ("%s\n", __func__);
2193
2194         poll_wait (file, &fepriv->events.wait_queue, wait);
2195
2196         if (fepriv->events.eventw != fepriv->events.eventr)
2197                 return (POLLIN | POLLRDNORM | POLLPRI);
2198
2199         return 0;
2200 }
2201
2202 static int dvb_frontend_open(struct inode *inode, struct file *file)
2203 {
2204         struct dvb_device *dvbdev = file->private_data;
2205         struct dvb_frontend *fe = dvbdev->priv;
2206         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2207         struct dvb_adapter *adapter = fe->dvb;
2208         int ret;
2209
2210         dprintk ("%s\n", __func__);
2211         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2212                 return -ENODEV;
2213
2214         if (adapter->mfe_shared) {
2215                 mutex_lock (&adapter->mfe_lock);
2216
2217                 if (adapter->mfe_dvbdev == NULL)
2218                         adapter->mfe_dvbdev = dvbdev;
2219
2220                 else if (adapter->mfe_dvbdev != dvbdev) {
2221                         struct dvb_device
2222                                 *mfedev = adapter->mfe_dvbdev;
2223                         struct dvb_frontend
2224                                 *mfe = mfedev->priv;
2225                         struct dvb_frontend_private
2226                                 *mfepriv = mfe->frontend_priv;
2227                         int mferetry = (dvb_mfe_wait_time << 1);
2228
2229                         mutex_unlock (&adapter->mfe_lock);
2230                         while (mferetry-- && (mfedev->users != -1 ||
2231                                         mfepriv->thread != NULL)) {
2232                                 if(msleep_interruptible(500)) {
2233                                         if(signal_pending(current))
2234                                                 return -EINTR;
2235                                 }
2236                         }
2237
2238                         mutex_lock (&adapter->mfe_lock);
2239                         if(adapter->mfe_dvbdev != dvbdev) {
2240                                 mfedev = adapter->mfe_dvbdev;
2241                                 mfe = mfedev->priv;
2242                                 mfepriv = mfe->frontend_priv;
2243                                 if (mfedev->users != -1 ||
2244                                                 mfepriv->thread != NULL) {
2245                                         mutex_unlock (&adapter->mfe_lock);
2246                                         return -EBUSY;
2247                                 }
2248                                 adapter->mfe_dvbdev = dvbdev;
2249                         }
2250                 }
2251         }
2252
2253         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2254                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2255                         goto err0;
2256
2257                 /* If we took control of the bus, we need to force
2258                    reinitialization.  This is because many ts_bus_ctrl()
2259                    functions strobe the RESET pin on the demod, and if the
2260                    frontend thread already exists then the dvb_init() routine
2261                    won't get called (which is what usually does initial
2262                    register configuration). */
2263                 fepriv->reinitialise = 1;
2264         }
2265
2266         if ((ret = dvb_generic_open (inode, file)) < 0)
2267                 goto err1;
2268
2269         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2270                 /* normal tune mode when opened R/W */
2271                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2272                 fepriv->tone = -1;
2273                 fepriv->voltage = -1;
2274
2275                 ret = dvb_frontend_start (fe);
2276                 if (ret)
2277                         goto err2;
2278
2279                 /*  empty event queue */
2280                 fepriv->events.eventr = fepriv->events.eventw = 0;
2281         }
2282
2283         if (adapter->mfe_shared)
2284                 mutex_unlock (&adapter->mfe_lock);
2285         return ret;
2286
2287 err2:
2288         dvb_generic_release(inode, file);
2289 err1:
2290         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2291                 fe->ops.ts_bus_ctrl(fe, 0);
2292 err0:
2293         if (adapter->mfe_shared)
2294                 mutex_unlock (&adapter->mfe_lock);
2295         return ret;
2296 }
2297
2298 static int dvb_frontend_release(struct inode *inode, struct file *file)
2299 {
2300         struct dvb_device *dvbdev = file->private_data;
2301         struct dvb_frontend *fe = dvbdev->priv;
2302         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2303         int ret;
2304
2305         dprintk ("%s\n", __func__);
2306
2307         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2308                 fepriv->release_jiffies = jiffies;
2309                 mb();
2310         }
2311
2312         ret = dvb_generic_release (inode, file);
2313
2314         if (dvbdev->users == -1) {
2315                 wake_up(&fepriv->wait_queue);
2316                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2317                         fops_put(file->f_op);
2318                         file->f_op = NULL;
2319                         wake_up(&dvbdev->wait_queue);
2320                 }
2321                 if (fe->ops.ts_bus_ctrl)
2322                         fe->ops.ts_bus_ctrl(fe, 0);
2323         }
2324
2325         return ret;
2326 }
2327
2328 static const struct file_operations dvb_frontend_fops = {
2329         .owner          = THIS_MODULE,
2330         .unlocked_ioctl = dvb_generic_ioctl,
2331         .poll           = dvb_frontend_poll,
2332         .open           = dvb_frontend_open,
2333         .release        = dvb_frontend_release,
2334         .llseek         = noop_llseek,
2335 };
2336
2337 int dvb_register_frontend(struct dvb_adapter* dvb,
2338                           struct dvb_frontend* fe)
2339 {
2340         struct dvb_frontend_private *fepriv;
2341         static const struct dvb_device dvbdev_template = {
2342                 .users = ~0,
2343                 .writers = 1,
2344                 .readers = (~0)-1,
2345                 .fops = &dvb_frontend_fops,
2346                 .kernel_ioctl = dvb_frontend_ioctl
2347         };
2348
2349         dprintk ("%s\n", __func__);
2350
2351         if (mutex_lock_interruptible(&frontend_mutex))
2352                 return -ERESTARTSYS;
2353
2354         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2355         if (fe->frontend_priv == NULL) {
2356                 mutex_unlock(&frontend_mutex);
2357                 return -ENOMEM;
2358         }
2359         fepriv = fe->frontend_priv;
2360
2361         sema_init(&fepriv->sem, 1);
2362         init_waitqueue_head (&fepriv->wait_queue);
2363         init_waitqueue_head (&fepriv->events.wait_queue);
2364         mutex_init(&fepriv->events.mtx);
2365         fe->dvb = dvb;
2366         fepriv->inversion = INVERSION_OFF;
2367
2368         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2369                 fe->dvb->num,
2370                 fe->id,
2371                 fe->ops.info.name);
2372
2373         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2374                              fe, DVB_DEVICE_FRONTEND);
2375
2376         /*
2377          * Initialize the cache to the proper values according with the
2378          * first supported delivery system (ops->delsys[0])
2379          */
2380
2381         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2382         dvb_frontend_clear_cache(fe);
2383
2384         mutex_unlock(&frontend_mutex);
2385         return 0;
2386 }
2387 EXPORT_SYMBOL(dvb_register_frontend);
2388
2389 int dvb_unregister_frontend(struct dvb_frontend* fe)
2390 {
2391         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2392         dprintk ("%s\n", __func__);
2393
2394         mutex_lock(&frontend_mutex);
2395         dvb_frontend_stop (fe);
2396         mutex_unlock(&frontend_mutex);
2397
2398         if (fepriv->dvbdev->users < -1)
2399                 wait_event(fepriv->dvbdev->wait_queue,
2400                                 fepriv->dvbdev->users==-1);
2401
2402         mutex_lock(&frontend_mutex);
2403         dvb_unregister_device (fepriv->dvbdev);
2404
2405         /* fe is invalid now */
2406         kfree(fepriv);
2407         mutex_unlock(&frontend_mutex);
2408         return 0;
2409 }
2410 EXPORT_SYMBOL(dvb_unregister_frontend);
2411
2412 #ifdef CONFIG_MEDIA_ATTACH
2413 void dvb_frontend_detach(struct dvb_frontend* fe)
2414 {
2415         void *ptr;
2416
2417         if (fe->ops.release_sec) {
2418                 fe->ops.release_sec(fe);
2419                 symbol_put_addr(fe->ops.release_sec);
2420         }
2421         if (fe->ops.tuner_ops.release) {
2422                 fe->ops.tuner_ops.release(fe);
2423                 symbol_put_addr(fe->ops.tuner_ops.release);
2424         }
2425         if (fe->ops.analog_ops.release) {
2426                 fe->ops.analog_ops.release(fe);
2427                 symbol_put_addr(fe->ops.analog_ops.release);
2428         }
2429         ptr = (void*)fe->ops.release;
2430         if (ptr) {
2431                 fe->ops.release(fe);
2432                 symbol_put_addr(ptr);
2433         }
2434 }
2435 #else
2436 void dvb_frontend_detach(struct dvb_frontend* fe)
2437 {
2438         if (fe->ops.release_sec)
2439                 fe->ops.release_sec(fe);
2440         if (fe->ops.tuner_ops.release)
2441                 fe->ops.tuner_ops.release(fe);
2442         if (fe->ops.analog_ops.release)
2443                 fe->ops.analog_ops.release(fe);
2444         if (fe->ops.release)
2445                 fe->ops.release(fe);
2446 }
2447 #endif
2448 EXPORT_SYMBOL(dvb_frontend_detach);