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                                 }
 659
 660                                 if (fe->ops.tune)
 661                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 662
 663                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 664                                         dprintk("%s: state changed, adding current state\n", __func__);
 665                                         dvb_frontend_add_event(fe, s);
 666                                         fepriv->status = s;
 667                                 }
 668                                 break;
 669                         case DVBFE_ALGO_SW:
 670                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 671                                 dvb_frontend_swzigzag(fe);
 672                                 break;
 673                         case DVBFE_ALGO_CUSTOM:
 674                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 675                                 if (fepriv->state & FESTATE_RETUNE) {
 676                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 677                                         fepriv->state = FESTATE_TUNED;
 678                                 }
 679                                 /* Case where we are going to search for a carrier
 680                                  * User asked us to retune again for some reason, possibly
 681                                  * requesting a search with a new set of parameters
 682                                  */
 683                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 684                                         if (fe->ops.search) {
 685                                                 fepriv->algo_status = fe->ops.search(fe);
 686                                                 /* We did do a search as was requested, the flags are
 687                                                  * now unset as well and has the flags wrt to search.
 688                                                  */
 689                                         } else {
 690                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 691                                         }
 692                                 }
 693                                 /* Track the carrier if the search was successful */
 694                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 695                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 696                                         fepriv->delay = HZ / 2;
 697                                 }
 698                                 fe->ops.read_status(fe, &s);
 699                                 if (s != fepriv->status) {
 700                                         dvb_frontend_add_event(fe, s); /* update event list */
 701                                         fepriv->status = s;
 702                                         if (!(s & FE_HAS_LOCK)) {
 703                                                 fepriv->delay = HZ / 10;
 704                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 705                                         } else {
 706                                                 fepriv->delay = 60 * HZ;
 707                                         }
 708                                 }
 709                                 break;
 710                         default:
 711                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 712                                 break;
 713                         }
 714                 } else {
 715                         dvb_frontend_swzigzag(fe);
 716                 }
 717         }
 718
 719         if (dvb_powerdown_on_sleep) {
 720                 if (fe->ops.set_voltage)
 721                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 722                 if (fe->ops.tuner_ops.sleep) {
 723                         if (fe->ops.i2c_gate_ctrl)
 724                                 fe->ops.i2c_gate_ctrl(fe, 1);
 725                         fe->ops.tuner_ops.sleep(fe);
 726                         if (fe->ops.i2c_gate_ctrl)
 727                                 fe->ops.i2c_gate_ctrl(fe, 0);
 728                 }
 729                 if (fe->ops.sleep)
 730                         fe->ops.sleep(fe);
 731         }
 732
 733         fepriv->thread = NULL;
 734         if (kthread_should_stop())
 735                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 736         else
 737                 fepriv->exit = DVB_FE_NO_EXIT;
 738         mb();
 739
 740         dvb_frontend_wakeup(fe);
 741         return 0;
 742 }
 743
 744 static void dvb_frontend_stop(struct dvb_frontend *fe)
 745 {
 746         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 747
 748         dprintk ("%s\n", __func__);
 749
 750         fepriv->exit = DVB_FE_NORMAL_EXIT;
 751         mb();
 752
 753         if (!fepriv->thread)
 754                 return;
 755
 756         kthread_stop(fepriv->thread);
 757
 758         sema_init(&fepriv->sem, 1);
 759         fepriv->state = FESTATE_IDLE;
 760
 761         /* paranoia check in case a signal arrived */
 762         if (fepriv->thread)
 763                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 764                                 fepriv->thread);
 765 }
 766
 767 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 768 {
 769         return ((curtime.tv_usec < lasttime.tv_usec) ?
 770                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 771                 curtime.tv_usec - lasttime.tv_usec);
 772 }
 773 EXPORT_SYMBOL(timeval_usec_diff);
 774
 775 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 776 {
 777         curtime->tv_usec += add_usec;
 778         if (curtime->tv_usec >= 1000000) {
 779                 curtime->tv_usec -= 1000000;
 780                 curtime->tv_sec++;
 781         }
 782 }
 783
 784 /*
 785  * Sleep until gettimeofday() > waketime + add_usec
 786  * This needs to be as precise as possible, but as the delay is
 787  * usually between 2ms and 32ms, it is done using a scheduled msleep
 788  * followed by usleep (normally a busy-wait loop) for the remainder
 789  */
 790 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 791 {
 792         struct timeval lasttime;
 793         s32 delta, newdelta;
 794
 795         timeval_usec_add(waketime, add_usec);
 796
 797         do_gettimeofday(&lasttime);
 798         delta = timeval_usec_diff(lasttime, *waketime);
 799         if (delta > 2500) {
 800                 msleep((delta - 1500) / 1000);
 801                 do_gettimeofday(&lasttime);
 802                 newdelta = timeval_usec_diff(lasttime, *waketime);
 803                 delta = (newdelta > delta) ? 0 : newdelta;
 804         }
 805         if (delta > 0)
 806                 udelay(delta);
 807 }
 808 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 809
 810 static int dvb_frontend_start(struct dvb_frontend *fe)
 811 {
 812         int ret;
 813         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 814         struct task_struct *fe_thread;
 815
 816         dprintk ("%s\n", __func__);
 817
 818         if (fepriv->thread) {
 819                 if (fepriv->exit == DVB_FE_NO_EXIT)
 820                         return 0;
 821                 else
 822                         dvb_frontend_stop (fe);
 823         }
 824
 825         if (signal_pending(current))
 826                 return -EINTR;
 827         if (down_interruptible (&fepriv->sem))
 828                 return -EINTR;
 829
 830         fepriv->state = FESTATE_IDLE;
 831         fepriv->exit = DVB_FE_NO_EXIT;
 832         fepriv->thread = NULL;
 833         mb();
 834
 835         fe_thread = kthread_run(dvb_frontend_thread, fe,
 836                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 837         if (IS_ERR(fe_thread)) {
 838                 ret = PTR_ERR(fe_thread);
 839                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 840                 up(&fepriv->sem);
 841                 return ret;
 842         }
 843         fepriv->thread = fe_thread;
 844         return 0;
 845 }
 846
 847 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 848                                         u32 *freq_min, u32 *freq_max)
 849 {
 850         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 851
 852         if (fe->ops.info.frequency_max == 0)
 853                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 854         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 855                 *freq_max = fe->ops.info.frequency_max;
 856         else
 857                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 858
 859         if (*freq_min == 0 || *freq_max == 0)
 860                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 861                        fe->dvb->num,fe->id);
 862 }
 863
 864 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 865 {
 866         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 867         u32 freq_min;
 868         u32 freq_max;
 869
 870         /* range check: frequency */
 871         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 872         if ((freq_min && c->frequency < freq_min) ||
 873             (freq_max && c->frequency > freq_max)) {
 874                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 875                        fe->dvb->num, fe->id, c->frequency, freq_min, freq_max);
 876                 return -EINVAL;
 877         }
 878
 879         /* range check: symbol rate */
 880         switch (c->delivery_system) {
 881         case SYS_DVBS:
 882         case SYS_DVBS2:
 883         case SYS_TURBO:
 884         case SYS_DVBC_ANNEX_A:
 885         case SYS_DVBC_ANNEX_C:
 886                 if ((fe->ops.info.symbol_rate_min &&
 887                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 888                     (fe->ops.info.symbol_rate_max &&
 889                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 890                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 891                                fe->dvb->num, fe->id, c->symbol_rate,
 892                                fe->ops.info.symbol_rate_min,
 893                                fe->ops.info.symbol_rate_max);
 894                         return -EINVAL;
 895                 }
 896         default:
 897                 break;
 898         }
 899
 900         return 0;
 901 }
 902
 903 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 904 {
 905         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 906         int i;
 907         u32 delsys;
 908
 909         delsys = c->delivery_system;
 910         memset(c, 0, sizeof(struct dtv_frontend_properties));
 911         c->delivery_system = delsys;
 912
 913         c->state = DTV_CLEAR;
 914
 915         dprintk("%s() Clearing cache for delivery system %d\n", __func__,
 916                 c->delivery_system);
 917
 918         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 919         c->bandwidth_hz = 0;    /* AUTO */
 920         c->guard_interval = GUARD_INTERVAL_AUTO;
 921         c->hierarchy = HIERARCHY_AUTO;
 922         c->symbol_rate = 0;
 923         c->code_rate_HP = FEC_AUTO;
 924         c->code_rate_LP = FEC_AUTO;
 925         c->fec_inner = FEC_AUTO;
 926         c->rolloff = ROLLOFF_AUTO;
 927         c->voltage = SEC_VOLTAGE_OFF;
 928         c->sectone = SEC_TONE_OFF;
 929         c->pilot = PILOT_AUTO;
 930
 931         c->isdbt_partial_reception = 0;
 932         c->isdbt_sb_mode = 0;
 933         c->isdbt_sb_subchannel = 0;
 934         c->isdbt_sb_segment_idx = 0;
 935         c->isdbt_sb_segment_count = 0;
 936         c->isdbt_layer_enabled = 0;
 937         for (i = 0; i < 3; i++) {
 938                 c->layer[i].fec = FEC_AUTO;
 939                 c->layer[i].modulation = QAM_AUTO;
 940                 c->layer[i].interleaving = 0;
 941                 c->layer[i].segment_count = 0;
 942         }
 943
 944         c->isdbs_ts_id = 0;
 945         c->dvbt2_plp_id = 0;
 946
 947         switch (c->delivery_system) {
 948         case SYS_DVBS:
 949         case SYS_DVBS2:
 950         case SYS_TURBO:
 951                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 952                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 953                 break;
 954         case SYS_ATSC:
 955                 c->modulation = VSB_8;
 956                 break;
 957         default:
 958                 c->modulation = QAM_AUTO;
 959                 break;
 960         }
 961
 962         return 0;
 963 }
 964
 965 #define _DTV_CMD(n, s, b) \
 966 [n] = { \
 967         .name = #n, \
 968         .cmd  = n, \
 969         .set  = s,\
 970         .buffer = b \
 971 }
 972
 973 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 974         _DTV_CMD(DTV_TUNE, 1, 0),
 975         _DTV_CMD(DTV_CLEAR, 1, 0),
 976
 977         /* Set */
 978         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 979         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 980         _DTV_CMD(DTV_MODULATION, 1, 0),
 981         _DTV_CMD(DTV_INVERSION, 1, 0),
 982         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 983         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 984         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 985         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 986         _DTV_CMD(DTV_TONE, 1, 0),
 987         _DTV_CMD(DTV_PILOT, 1, 0),
 988         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 989         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 990         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 991         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 992         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 993         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 994         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
 995
 996         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
 997         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
 998         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
 999         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1000         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1001         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1002         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1003         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1004         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1005         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1006         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1007         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1008         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1009         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1010         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1011         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1012         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1013         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1014
1015         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
1016         _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
1017
1018         /* Get */
1019         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1020         _DTV_CMD(DTV_API_VERSION, 0, 0),
1021         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
1022         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
1023         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
1024         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
1025         _DTV_CMD(DTV_HIERARCHY, 0, 0),
1026
1027         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1028 };
1029
1030 static void dtv_property_dump(struct dtv_property *tvp)
1031 {
1032         int i;
1033
1034         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1035                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1036                         __func__, tvp->cmd);
1037                 return;
1038         }
1039
1040         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
1041                 ,__func__
1042                 ,tvp->cmd
1043                 ,dtv_cmds[ tvp->cmd ].name);
1044
1045         if(dtv_cmds[ tvp->cmd ].buffer) {
1046
1047                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1048                         ,__func__
1049                         ,tvp->u.buffer.len);
1050
1051                 for(i = 0; i < tvp->u.buffer.len; i++)
1052                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1053                                 ,__func__
1054                                 ,i
1055                                 ,tvp->u.buffer.data[i]);
1056
1057         } else
1058                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1059 }
1060
1061 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1062  * drivers can use a single set_frontend tuning function, regardless of whether
1063  * it's being used for the legacy or new API, reducing code and complexity.
1064  */
1065 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1066                                    struct dtv_frontend_properties *c,
1067                                    const struct dvb_frontend_parameters *p)
1068 {
1069         c->frequency = p->frequency;
1070         c->inversion = p->inversion;
1071
1072         switch (dvbv3_type(c->delivery_system)) {
1073         case DVBV3_QPSK:
1074                 dprintk("%s() Preparing QPSK req\n", __func__);
1075                 c->symbol_rate = p->u.qpsk.symbol_rate;
1076                 c->fec_inner = p->u.qpsk.fec_inner;
1077                 break;
1078         case DVBV3_QAM:
1079                 dprintk("%s() Preparing QAM req\n", __func__);
1080                 c->symbol_rate = p->u.qam.symbol_rate;
1081                 c->fec_inner = p->u.qam.fec_inner;
1082                 c->modulation = p->u.qam.modulation;
1083                 break;
1084         case DVBV3_OFDM:
1085                 dprintk("%s() Preparing OFDM req\n", __func__);
1086                 switch (p->u.ofdm.bandwidth) {
1087                 case BANDWIDTH_10_MHZ:
1088                         c->bandwidth_hz = 10000000;
1089                         break;
1090                 case BANDWIDTH_8_MHZ:
1091                         c->bandwidth_hz = 8000000;
1092                         break;
1093                 case BANDWIDTH_7_MHZ:
1094                         c->bandwidth_hz = 7000000;
1095                         break;
1096                 case BANDWIDTH_6_MHZ:
1097                         c->bandwidth_hz = 6000000;
1098                         break;
1099                 case BANDWIDTH_5_MHZ:
1100                         c->bandwidth_hz = 5000000;
1101                         break;
1102                 case BANDWIDTH_1_712_MHZ:
1103                         c->bandwidth_hz = 1712000;
1104                         break;
1105                 case BANDWIDTH_AUTO:
1106                         c->bandwidth_hz = 0;
1107                 }
1108
1109                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1110                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1111                 c->modulation = p->u.ofdm.constellation;
1112                 c->transmission_mode = p->u.ofdm.transmission_mode;
1113                 c->guard_interval = p->u.ofdm.guard_interval;
1114                 c->hierarchy = p->u.ofdm.hierarchy_information;
1115                 break;
1116         case DVBV3_ATSC:
1117                 dprintk("%s() Preparing ATSC req\n", __func__);
1118                 c->modulation = p->u.vsb.modulation;
1119                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1120                         c->delivery_system = SYS_ATSC;
1121                 else
1122                         c->delivery_system = SYS_DVBC_ANNEX_B;
1123                 break;
1124         case DVBV3_UNKNOWN:
1125                 printk(KERN_ERR
1126                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1127                        __func__, c->delivery_system);
1128                 return -EINVAL;
1129         }
1130
1131         return 0;
1132 }
1133
1134 /* Ensure the cached values are set correctly in the frontend
1135  * legacy tuning structures, for the advanced tuning API.
1136  */
1137 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1138                                             struct dvb_frontend_parameters *p)
1139 {
1140         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1141
1142         p->frequency = c->frequency;
1143         p->inversion = c->inversion;
1144
1145         switch (dvbv3_type(c->delivery_system)) {
1146         case DVBV3_UNKNOWN:
1147                 printk(KERN_ERR
1148                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1149                        __func__, c->delivery_system);
1150                 return -EINVAL;
1151         case DVBV3_QPSK:
1152                 dprintk("%s() Preparing QPSK req\n", __func__);
1153                 p->u.qpsk.symbol_rate = c->symbol_rate;
1154                 p->u.qpsk.fec_inner = c->fec_inner;
1155                 break;
1156         case DVBV3_QAM:
1157                 dprintk("%s() Preparing QAM req\n", __func__);
1158                 p->u.qam.symbol_rate = c->symbol_rate;
1159                 p->u.qam.fec_inner = c->fec_inner;
1160                 p->u.qam.modulation = c->modulation;
1161                 break;
1162         case DVBV3_OFDM:
1163                 dprintk("%s() Preparing OFDM req\n", __func__);
1164
1165                 switch (c->bandwidth_hz) {
1166                 case 10000000:
1167                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1168                         break;
1169                 case 8000000:
1170                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1171                         break;
1172                 case 7000000:
1173                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1174                         break;
1175                 case 6000000:
1176                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1177                         break;
1178                 case 5000000:
1179                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1180                         break;
1181                 case 1712000:
1182                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1183                         break;
1184                 case 0:
1185                 default:
1186                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1187                 }
1188                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1189                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1190                 p->u.ofdm.constellation = c->modulation;
1191                 p->u.ofdm.transmission_mode = c->transmission_mode;
1192                 p->u.ofdm.guard_interval = c->guard_interval;
1193                 p->u.ofdm.hierarchy_information = c->hierarchy;
1194                 break;
1195         case DVBV3_ATSC:
1196                 dprintk("%s() Preparing VSB req\n", __func__);
1197                 p->u.vsb.modulation = c->modulation;
1198                 break;
1199         }
1200         return 0;
1201 }
1202
1203 /**
1204  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1205  * @fe:         struct dvb_frontend pointer
1206  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1207  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1208  *
1209  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1210  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1211  * If p_out is not null, it will update the DVBv3 params pointed by it.
1212  */
1213 static int dtv_get_frontend(struct dvb_frontend *fe,
1214                             struct dvb_frontend_parameters *p_out)
1215 {
1216         int r;
1217
1218         if (fe->ops.get_frontend) {
1219                 r = fe->ops.get_frontend(fe);
1220                 if (unlikely(r < 0))
1221                         return r;
1222                 if (p_out)
1223                         dtv_property_legacy_params_sync(fe, p_out);
1224                 return 0;
1225         }
1226
1227         /* As everything is in cache, get_frontend fops are always supported */
1228         return 0;
1229 }
1230
1231 static int dvb_frontend_ioctl_legacy(struct file *file,
1232                         unsigned int cmd, void *parg);
1233 static int dvb_frontend_ioctl_properties(struct file *file,
1234                         unsigned int cmd, void *parg);
1235
1236 static int dtv_property_process_get(struct dvb_frontend *fe,
1237                                     const struct dtv_frontend_properties *c,
1238                                     struct dtv_property *tvp,
1239                                     struct file *file)
1240 {
1241         int r, ncaps;
1242
1243         switch(tvp->cmd) {
1244         case DTV_ENUM_DELSYS:
1245                 ncaps = 0;
1246                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1247                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1248                         ncaps++;
1249                 }
1250                 tvp->u.buffer.len = ncaps;
1251                 break;
1252         case DTV_FREQUENCY:
1253                 tvp->u.data = c->frequency;
1254                 break;
1255         case DTV_MODULATION:
1256                 tvp->u.data = c->modulation;
1257                 break;
1258         case DTV_BANDWIDTH_HZ:
1259                 tvp->u.data = c->bandwidth_hz;
1260                 break;
1261         case DTV_INVERSION:
1262                 tvp->u.data = c->inversion;
1263                 break;
1264         case DTV_SYMBOL_RATE:
1265                 tvp->u.data = c->symbol_rate;
1266                 break;
1267         case DTV_INNER_FEC:
1268                 tvp->u.data = c->fec_inner;
1269                 break;
1270         case DTV_PILOT:
1271                 tvp->u.data = c->pilot;
1272                 break;
1273         case DTV_ROLLOFF:
1274                 tvp->u.data = c->rolloff;
1275                 break;
1276         case DTV_DELIVERY_SYSTEM:
1277                 tvp->u.data = c->delivery_system;
1278                 break;
1279         case DTV_VOLTAGE:
1280                 tvp->u.data = c->voltage;
1281                 break;
1282         case DTV_TONE:
1283                 tvp->u.data = c->sectone;
1284                 break;
1285         case DTV_API_VERSION:
1286                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1287                 break;
1288         case DTV_CODE_RATE_HP:
1289                 tvp->u.data = c->code_rate_HP;
1290                 break;
1291         case DTV_CODE_RATE_LP:
1292                 tvp->u.data = c->code_rate_LP;
1293                 break;
1294         case DTV_GUARD_INTERVAL:
1295                 tvp->u.data = c->guard_interval;
1296                 break;
1297         case DTV_TRANSMISSION_MODE:
1298                 tvp->u.data = c->transmission_mode;
1299                 break;
1300         case DTV_HIERARCHY:
1301                 tvp->u.data = c->hierarchy;
1302                 break;
1303
1304         /* ISDB-T Support here */
1305         case DTV_ISDBT_PARTIAL_RECEPTION:
1306                 tvp->u.data = c->isdbt_partial_reception;
1307                 break;
1308         case DTV_ISDBT_SOUND_BROADCASTING:
1309                 tvp->u.data = c->isdbt_sb_mode;
1310                 break;
1311         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1312                 tvp->u.data = c->isdbt_sb_subchannel;
1313                 break;
1314         case DTV_ISDBT_SB_SEGMENT_IDX:
1315                 tvp->u.data = c->isdbt_sb_segment_idx;
1316                 break;
1317         case DTV_ISDBT_SB_SEGMENT_COUNT:
1318                 tvp->u.data = c->isdbt_sb_segment_count;
1319                 break;
1320         case DTV_ISDBT_LAYER_ENABLED:
1321                 tvp->u.data = c->isdbt_layer_enabled;
1322                 break;
1323         case DTV_ISDBT_LAYERA_FEC:
1324                 tvp->u.data = c->layer[0].fec;
1325                 break;
1326         case DTV_ISDBT_LAYERA_MODULATION:
1327                 tvp->u.data = c->layer[0].modulation;
1328                 break;
1329         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1330                 tvp->u.data = c->layer[0].segment_count;
1331                 break;
1332         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1333                 tvp->u.data = c->layer[0].interleaving;
1334                 break;
1335         case DTV_ISDBT_LAYERB_FEC:
1336                 tvp->u.data = c->layer[1].fec;
1337                 break;
1338         case DTV_ISDBT_LAYERB_MODULATION:
1339                 tvp->u.data = c->layer[1].modulation;
1340                 break;
1341         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1342                 tvp->u.data = c->layer[1].segment_count;
1343                 break;
1344         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1345                 tvp->u.data = c->layer[1].interleaving;
1346                 break;
1347         case DTV_ISDBT_LAYERC_FEC:
1348                 tvp->u.data = c->layer[2].fec;
1349                 break;
1350         case DTV_ISDBT_LAYERC_MODULATION:
1351                 tvp->u.data = c->layer[2].modulation;
1352                 break;
1353         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1354                 tvp->u.data = c->layer[2].segment_count;
1355                 break;
1356         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1357                 tvp->u.data = c->layer[2].interleaving;
1358                 break;
1359         case DTV_ISDBS_TS_ID:
1360                 tvp->u.data = c->isdbs_ts_id;
1361                 break;
1362         case DTV_DVBT2_PLP_ID:
1363                 tvp->u.data = c->dvbt2_plp_id;
1364                 break;
1365         default:
1366                 return -EINVAL;
1367         }
1368
1369         /* Allow the frontend to override outgoing properties */
1370         if (fe->ops.get_property) {
1371                 r = fe->ops.get_property(fe, tvp);
1372                 if (r < 0)
1373                         return r;
1374         }
1375
1376         dtv_property_dump(tvp);
1377
1378         return 0;
1379 }
1380
1381 static int dtv_set_frontend(struct dvb_frontend *fe);
1382
1383 static bool is_dvbv3_delsys(u32 delsys)
1384 {
1385         bool status;
1386
1387         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1388                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1389
1390         return status;
1391 }
1392
1393 static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system)
1394 {
1395         int ncaps, i;
1396         u32 delsys = SYS_UNDEFINED;
1397         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1398         enum dvbv3_emulation_type type;
1399
1400         /*
1401          * It was reported that some old DVBv5 applications were
1402          * filling delivery_system with SYS_UNDEFINED. If this happens,
1403          * assume that the application wants to use the first supported
1404          * delivery system.
1405          */
1406         if (c->delivery_system == SYS_UNDEFINED)
1407                 c->delivery_system = fe->ops.delsys[0];
1408
1409         if (desired_system == SYS_UNDEFINED) {
1410                 /*
1411                  * A DVBv3 call doesn't know what's the desired system.
1412                  * Also, DVBv3 applications don't know that ops.info->type
1413                  * could be changed, and they simply dies when it doesn't
1414                  * match.
1415                  * So, don't change the current delivery system, as it
1416                  * may be trying to do the wrong thing, like setting an
1417                  * ISDB-T frontend as DVB-T. Instead, find the closest
1418                  * DVBv3 system that matches the delivery system.
1419                  */
1420                 if (is_dvbv3_delsys(c->delivery_system)) {
1421                         dprintk("%s() Using delivery system to %d\n",
1422                                 __func__, c->delivery_system);
1423                         return 0;
1424                 }
1425                 type = dvbv3_type(c->delivery_system);
1426                 switch (type) {
1427                 case DVBV3_QPSK:
1428                         desired_system = SYS_DVBS;
1429                         break;
1430                 case DVBV3_QAM:
1431                         desired_system = SYS_DVBC_ANNEX_A;
1432                         break;
1433                 case DVBV3_ATSC:
1434                         desired_system = SYS_ATSC;
1435                         break;
1436                 case DVBV3_OFDM:
1437                         desired_system = SYS_DVBT;
1438                         break;
1439                 default:
1440                         dprintk("%s(): This frontend doesn't support DVBv3 calls\n",
1441                                 __func__);
1442                         return -EINVAL;
1443                 }
1444         } else {
1445                 /*
1446                  * This is a DVBv5 call. So, it likely knows the supported
1447                  * delivery systems.
1448                  */
1449
1450                 /* Check if the desired delivery system is supported */
1451                 ncaps = 0;
1452                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1453                         if (fe->ops.delsys[ncaps] == desired_system) {
1454                                 c->delivery_system = desired_system;
1455                                 dprintk("%s() Changing delivery system to %d\n",
1456                                         __func__, desired_system);
1457                                 return 0;
1458                         }
1459                         ncaps++;
1460                 }
1461                 type = dvbv3_type(desired_system);
1462
1463                 /*
1464                  * The delivery system is not supported. See if it can be
1465                  * emulated.
1466                  * The emulation only works if the desired system is one of the
1467                  * DVBv3 delivery systems
1468                  */
1469                 if (!is_dvbv3_delsys(desired_system)) {
1470                         dprintk("%s() can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n",
1471                                 __func__);
1472                         return -EINVAL;
1473                 }
1474
1475                 /*
1476                  * Get the last non-DVBv3 delivery system that has the same type
1477                  * of the desired system
1478                  */
1479                 ncaps = 0;
1480                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1481                         if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) &&
1482                             !is_dvbv3_delsys(fe->ops.delsys[ncaps]))
1483                                 delsys = fe->ops.delsys[ncaps];
1484                         ncaps++;
1485                 }
1486                 /* There's nothing compatible with the desired delivery system */
1487                 if (delsys == SYS_UNDEFINED) {
1488                         dprintk("%s() Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n",
1489                                 __func__);
1490                         return -EINVAL;
1491                 }
1492                 c->delivery_system = delsys;
1493         }
1494
1495         /*
1496          * The DVBv3 or DVBv5 call is requesting a different system. So,
1497          * emulation is needed.
1498          *
1499          * Emulate newer delivery systems like ISDBT, DVBT and DMBTH
1500          * for older DVBv5 applications. The emulation will try to use
1501          * the auto mode for most things, and will assume that the desired
1502          * delivery system is the last one at the ops.delsys[] array
1503          */
1504         dprintk("%s() Using delivery system %d emulated as if it were a %d\n",
1505                 __func__, delsys, desired_system);
1506
1507         /*
1508          * For now, handles ISDB-T calls. More code may be needed here for the
1509          * other emulated stuff
1510          */
1511         if (type == DVBV3_OFDM) {
1512                 if (c->delivery_system == SYS_ISDBT) {
1513                         dprintk("%s() Using defaults for SYS_ISDBT\n",
1514                                 __func__);
1515                         if (!c->bandwidth_hz)
1516                                 c->bandwidth_hz = 6000000;
1517
1518                         c->isdbt_partial_reception = 0;
1519                         c->isdbt_sb_mode = 0;
1520                         c->isdbt_sb_subchannel = 0;
1521                         c->isdbt_sb_segment_idx = 0;
1522                         c->isdbt_sb_segment_count = 0;
1523                         c->isdbt_layer_enabled = 0;
1524                         for (i = 0; i < 3; i++) {
1525                                 c->layer[i].fec = FEC_AUTO;
1526                                 c->layer[i].modulation = QAM_AUTO;
1527                                 c->layer[i].interleaving = 0;
1528                                 c->layer[i].segment_count = 0;
1529                         }
1530                 }
1531         }
1532         dprintk("change delivery system on cache to %d\n", c->delivery_system);
1533
1534         return 0;
1535 }
1536
1537 static int dtv_property_process_set(struct dvb_frontend *fe,
1538                                     struct dtv_property *tvp,
1539                                     struct file *file)
1540 {
1541         int r = 0;
1542         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1543
1544         /* Allow the frontend to validate incoming properties */
1545         if (fe->ops.set_property) {
1546                 r = fe->ops.set_property(fe, tvp);
1547                 if (r < 0)
1548                         return r;
1549         }
1550
1551         switch(tvp->cmd) {
1552         case DTV_CLEAR:
1553                 /*
1554                  * Reset a cache of data specific to the frontend here. This does
1555                  * not effect hardware.
1556                  */
1557                 dvb_frontend_clear_cache(fe);
1558                 break;
1559         case DTV_TUNE:
1560                 /* interpret the cache of data, build either a traditional frontend
1561                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1562                  * ioctl.
1563                  */
1564                 c->state = tvp->cmd;
1565                 dprintk("%s() Finalised property cache\n", __func__);
1566
1567                 r = dtv_set_frontend(fe);
1568                 break;
1569         case DTV_FREQUENCY:
1570                 c->frequency = tvp->u.data;
1571                 break;
1572         case DTV_MODULATION:
1573                 c->modulation = tvp->u.data;
1574                 break;
1575         case DTV_BANDWIDTH_HZ:
1576                 c->bandwidth_hz = tvp->u.data;
1577                 break;
1578         case DTV_INVERSION:
1579                 c->inversion = tvp->u.data;
1580                 break;
1581         case DTV_SYMBOL_RATE:
1582                 c->symbol_rate = tvp->u.data;
1583                 break;
1584         case DTV_INNER_FEC:
1585                 c->fec_inner = tvp->u.data;
1586                 break;
1587         case DTV_PILOT:
1588                 c->pilot = tvp->u.data;
1589                 break;
1590         case DTV_ROLLOFF:
1591                 c->rolloff = tvp->u.data;
1592                 break;
1593         case DTV_DELIVERY_SYSTEM:
1594                 r = set_delivery_system(fe, tvp->u.data);
1595                 break;
1596         case DTV_VOLTAGE:
1597                 c->voltage = tvp->u.data;
1598                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1599                         (void *)c->voltage);
1600                 break;
1601         case DTV_TONE:
1602                 c->sectone = tvp->u.data;
1603                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1604                         (void *)c->sectone);
1605                 break;
1606         case DTV_CODE_RATE_HP:
1607                 c->code_rate_HP = tvp->u.data;
1608                 break;
1609         case DTV_CODE_RATE_LP:
1610                 c->code_rate_LP = tvp->u.data;
1611                 break;
1612         case DTV_GUARD_INTERVAL:
1613                 c->guard_interval = tvp->u.data;
1614                 break;
1615         case DTV_TRANSMISSION_MODE:
1616                 c->transmission_mode = tvp->u.data;
1617                 break;
1618         case DTV_HIERARCHY:
1619                 c->hierarchy = tvp->u.data;
1620                 break;
1621
1622         /* ISDB-T Support here */
1623         case DTV_ISDBT_PARTIAL_RECEPTION:
1624                 c->isdbt_partial_reception = tvp->u.data;
1625                 break;
1626         case DTV_ISDBT_SOUND_BROADCASTING:
1627                 c->isdbt_sb_mode = tvp->u.data;
1628                 break;
1629         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1630                 c->isdbt_sb_subchannel = tvp->u.data;
1631                 break;
1632         case DTV_ISDBT_SB_SEGMENT_IDX:
1633                 c->isdbt_sb_segment_idx = tvp->u.data;
1634                 break;
1635         case DTV_ISDBT_SB_SEGMENT_COUNT:
1636                 c->isdbt_sb_segment_count = tvp->u.data;
1637                 break;
1638         case DTV_ISDBT_LAYER_ENABLED:
1639                 c->isdbt_layer_enabled = tvp->u.data;
1640                 break;
1641         case DTV_ISDBT_LAYERA_FEC:
1642                 c->layer[0].fec = tvp->u.data;
1643                 break;
1644         case DTV_ISDBT_LAYERA_MODULATION:
1645                 c->layer[0].modulation = tvp->u.data;
1646                 break;
1647         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1648                 c->layer[0].segment_count = tvp->u.data;
1649                 break;
1650         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1651                 c->layer[0].interleaving = tvp->u.data;
1652                 break;
1653         case DTV_ISDBT_LAYERB_FEC:
1654                 c->layer[1].fec = tvp->u.data;
1655                 break;
1656         case DTV_ISDBT_LAYERB_MODULATION:
1657                 c->layer[1].modulation = tvp->u.data;
1658                 break;
1659         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1660                 c->layer[1].segment_count = tvp->u.data;
1661                 break;
1662         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1663                 c->layer[1].interleaving = tvp->u.data;
1664                 break;
1665         case DTV_ISDBT_LAYERC_FEC:
1666                 c->layer[2].fec = tvp->u.data;
1667                 break;
1668         case DTV_ISDBT_LAYERC_MODULATION:
1669                 c->layer[2].modulation = tvp->u.data;
1670                 break;
1671         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1672                 c->layer[2].segment_count = tvp->u.data;
1673                 break;
1674         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1675                 c->layer[2].interleaving = tvp->u.data;
1676                 break;
1677         case DTV_ISDBS_TS_ID:
1678                 c->isdbs_ts_id = tvp->u.data;
1679                 break;
1680         case DTV_DVBT2_PLP_ID:
1681                 c->dvbt2_plp_id = tvp->u.data;
1682                 break;
1683         default:
1684                 return -EINVAL;
1685         }
1686
1687         return r;
1688 }
1689
1690 static int dvb_frontend_ioctl(struct file *file,
1691                         unsigned int cmd, void *parg)
1692 {
1693         struct dvb_device *dvbdev = file->private_data;
1694         struct dvb_frontend *fe = dvbdev->priv;
1695         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1696         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1697         int err = -EOPNOTSUPP;
1698
1699         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1700
1701         if (fepriv->exit != DVB_FE_NO_EXIT)
1702                 return -ENODEV;
1703
1704         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1705             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1706              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1707                 return -EPERM;
1708
1709         if (down_interruptible (&fepriv->sem))
1710                 return -ERESTARTSYS;
1711
1712         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1713                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1714         else {
1715                 c->state = DTV_UNDEFINED;
1716                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1717         }
1718
1719         up(&fepriv->sem);
1720         return err;
1721 }
1722
1723 static int dvb_frontend_ioctl_properties(struct file *file,
1724                         unsigned int cmd, void *parg)
1725 {
1726         struct dvb_device *dvbdev = file->private_data;
1727         struct dvb_frontend *fe = dvbdev->priv;
1728         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1729         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1730         int err = 0;
1731
1732         struct dtv_properties *tvps = NULL;
1733         struct dtv_property *tvp = NULL;
1734         int i;
1735
1736         dprintk("%s\n", __func__);
1737
1738         if(cmd == FE_SET_PROPERTY) {
1739                 tvps = (struct dtv_properties __user *)parg;
1740
1741                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1742                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1743
1744                 /* Put an arbitrary limit on the number of messages that can
1745                  * be sent at once */
1746                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1747                         return -EINVAL;
1748
1749                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1750                 if (!tvp) {
1751                         err = -ENOMEM;
1752                         goto out;
1753                 }
1754
1755                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1756                         err = -EFAULT;
1757                         goto out;
1758                 }
1759
1760                 for (i = 0; i < tvps->num; i++) {
1761                         err = dtv_property_process_set(fe, tvp + i, file);
1762                         if (err < 0)
1763                                 goto out;
1764                         (tvp + i)->result = err;
1765                 }
1766
1767                 if (c->state == DTV_TUNE)
1768                         dprintk("%s() Property cache is full, tuning\n", __func__);
1769
1770         } else
1771         if(cmd == FE_GET_PROPERTY) {
1772                 tvps = (struct dtv_properties __user *)parg;
1773
1774                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1775                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1776
1777                 /* Put an arbitrary limit on the number of messages that can
1778                  * be sent at once */
1779                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1780                         return -EINVAL;
1781
1782                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1783                 if (!tvp) {
1784                         err = -ENOMEM;
1785                         goto out;
1786                 }
1787
1788                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1789                         err = -EFAULT;
1790                         goto out;
1791                 }
1792
1793                 /*
1794                  * Fills the cache out struct with the cache contents, plus
1795                  * the data retrieved from get_frontend, if the frontend
1796                  * is not idle. Otherwise, returns the cached content
1797                  */
1798                 if (fepriv->state != FESTATE_IDLE) {
1799                         err = dtv_get_frontend(fe, NULL);
1800                         if (err < 0)
1801                                 goto out;
1802                 }
1803                 for (i = 0; i < tvps->num; i++) {
1804                         err = dtv_property_process_get(fe, c, tvp + i, file);
1805                         if (err < 0)
1806                                 goto out;
1807                         (tvp + i)->result = err;
1808                 }
1809
1810                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1811                         err = -EFAULT;
1812                         goto out;
1813                 }
1814
1815         } else
1816                 err = -EOPNOTSUPP;
1817
1818 out:
1819         kfree(tvp);
1820         return err;
1821 }
1822
1823 static int dtv_set_frontend(struct dvb_frontend *fe)
1824 {
1825         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1826         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1827         struct dvb_frontend_tune_settings fetunesettings;
1828         u32 rolloff = 0;
1829
1830         if (dvb_frontend_check_parameters(fe) < 0)
1831                 return -EINVAL;
1832
1833         /*
1834          * Be sure that the bandwidth will be filled for all
1835          * non-satellite systems, as tuners need to know what
1836          * low pass/Nyquist half filter should be applied, in
1837          * order to avoid inter-channel noise.
1838          *
1839          * ISDB-T and DVB-T/T2 already sets bandwidth.
1840          * ATSC and DVB-C don't set, so, the core should fill it.
1841          *
1842          * On DVB-C Annex A and C, the bandwidth is a function of
1843          * the roll-off and symbol rate. Annex B defines different
1844          * roll-off factors depending on the modulation. Fortunately,
1845          * Annex B is only used with 6MHz, so there's no need to
1846          * calculate it.
1847          *
1848          * While not officially supported, a side effect of handling it at
1849          * the cache level is that a program could retrieve the bandwidth
1850          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1851          */
1852         switch (c->delivery_system) {
1853         case SYS_ATSC:
1854         case SYS_DVBC_ANNEX_B:
1855                 c->bandwidth_hz = 6000000;
1856                 break;
1857         case SYS_DVBC_ANNEX_A:
1858                 rolloff = 115;
1859                 break;
1860         case SYS_DVBC_ANNEX_C:
1861                 rolloff = 113;
1862                 break;
1863         default:
1864                 break;
1865         }
1866         if (rolloff)
1867                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
1868
1869         /* force auto frequency inversion if requested */
1870         if (dvb_force_auto_inversion)
1871                 c->inversion = INVERSION_AUTO;
1872
1873         /*
1874          * without hierarchical coding code_rate_LP is irrelevant,
1875          * so we tolerate the otherwise invalid FEC_NONE setting
1876          */
1877         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
1878                 c->code_rate_LP = FEC_AUTO;
1879
1880         /* get frontend-specific tuning settings */
1881         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1882         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1883                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1884                 fepriv->max_drift = fetunesettings.max_drift;
1885                 fepriv->step_size = fetunesettings.step_size;
1886         } else {
1887                 /* default values */
1888                 switch (c->delivery_system) {
1889                 case SYS_DVBC_ANNEX_A:
1890                 case SYS_DVBC_ANNEX_C:
1891                         fepriv->min_delay = HZ / 20;
1892                         fepriv->step_size = c->symbol_rate / 16000;
1893                         fepriv->max_drift = c->symbol_rate / 2000;
1894                         break;
1895                 case SYS_DVBT:
1896                 case SYS_DVBT2:
1897                 case SYS_ISDBT:
1898                 case SYS_DMBTH:
1899                         fepriv->min_delay = HZ / 20;
1900                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1901                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1902                         break;
1903                 default:
1904                         /*
1905                          * FIXME: This sounds wrong! if freqency_stepsize is
1906                          * defined by the frontend, why not use it???
1907                          */
1908                         fepriv->min_delay = HZ / 20;
1909                         fepriv->step_size = 0; /* no zigzag */
1910                         fepriv->max_drift = 0;
1911                         break;
1912                 }
1913         }
1914         if (dvb_override_tune_delay > 0)
1915                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1916
1917         fepriv->state = FESTATE_RETUNE;
1918
1919         /* Request the search algorithm to search */
1920         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1921
1922         dvb_frontend_clear_events(fe);
1923         dvb_frontend_add_event(fe, 0);
1924         dvb_frontend_wakeup(fe);
1925         fepriv->status = 0;
1926
1927         return 0;
1928 }
1929
1930
1931 static int dvb_frontend_ioctl_legacy(struct file *file,
1932                         unsigned int cmd, void *parg)
1933 {
1934         struct dvb_device *dvbdev = file->private_data;
1935         struct dvb_frontend *fe = dvbdev->priv;
1936         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1937         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1938         int cb_err, err = -EOPNOTSUPP;
1939
1940         if (fe->dvb->fe_ioctl_override) {
1941                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1942                                                     DVB_FE_IOCTL_PRE);
1943                 if (cb_err < 0)
1944                         return cb_err;
1945                 if (cb_err > 0)
1946                         return 0;
1947                 /* fe_ioctl_override returning 0 allows
1948                  * dvb-core to continue handling the ioctl */
1949         }
1950
1951         switch (cmd) {
1952         case FE_GET_INFO: {
1953                 struct dvb_frontend_info* info = parg;
1954
1955                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1956                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1957
1958                 /*
1959                  * Associate the 4 delivery systems supported by DVBv3
1960                  * API with their DVBv5 counterpart. For the other standards,
1961                  * use the closest type, assuming that it would hopefully
1962                  * work with a DVBv3 application.
1963                  * It should be noticed that, on multi-frontend devices with
1964                  * different types (terrestrial and cable, for example),
1965                  * a pure DVBv3 application won't be able to use all delivery
1966                  * systems. Yet, changing the DVBv5 cache to the other delivery
1967                  * system should be enough for making it work.
1968                  */
1969                 switch (dvbv3_type(c->delivery_system)) {
1970                 case DVBV3_QPSK:
1971                         info->type = FE_QPSK;
1972                         break;
1973                 case DVBV3_ATSC:
1974                         info->type = FE_ATSC;
1975                         break;
1976                 case DVBV3_QAM:
1977                         info->type = FE_QAM;
1978                         break;
1979                 case DVBV3_OFDM:
1980                         info->type = FE_OFDM;
1981                         break;
1982                 default:
1983                         printk(KERN_ERR
1984                                "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1985                                __func__, c->delivery_system);
1986                         fe->ops.info.type = FE_OFDM;
1987                 }
1988                 dprintk("current delivery system on cache: %d, V3 type: %d\n",
1989                         c->delivery_system, fe->ops.info.type);
1990
1991                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1992                  * do it, it is done for it. */
1993                 info->caps |= FE_CAN_INVERSION_AUTO;
1994                 err = 0;
1995                 break;
1996         }
1997
1998         case FE_READ_STATUS: {
1999                 fe_status_t* status = parg;
2000
2001                 /* if retune was requested but hasn't occurred yet, prevent
2002                  * that user get signal state from previous tuning */
2003                 if (fepriv->state == FESTATE_RETUNE ||
2004                     fepriv->state == FESTATE_ERROR) {
2005                         err=0;
2006                         *status = 0;
2007                         break;
2008                 }
2009
2010                 if (fe->ops.read_status)
2011                         err = fe->ops.read_status(fe, status);
2012                 break;
2013         }
2014         case FE_READ_BER:
2015                 if (fe->ops.read_ber)
2016                         err = fe->ops.read_ber(fe, (__u32*) parg);
2017                 break;
2018
2019         case FE_READ_SIGNAL_STRENGTH:
2020                 if (fe->ops.read_signal_strength)
2021                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
2022                 break;
2023
2024         case FE_READ_SNR:
2025                 if (fe->ops.read_snr)
2026                         err = fe->ops.read_snr(fe, (__u16*) parg);
2027                 break;
2028
2029         case FE_READ_UNCORRECTED_BLOCKS:
2030                 if (fe->ops.read_ucblocks)
2031                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
2032                 break;
2033
2034
2035         case FE_DISEQC_RESET_OVERLOAD:
2036                 if (fe->ops.diseqc_reset_overload) {
2037                         err = fe->ops.diseqc_reset_overload(fe);
2038                         fepriv->state = FESTATE_DISEQC;
2039                         fepriv->status = 0;
2040                 }
2041                 break;
2042
2043         case FE_DISEQC_SEND_MASTER_CMD:
2044                 if (fe->ops.diseqc_send_master_cmd) {
2045                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2046                         fepriv->state = FESTATE_DISEQC;
2047                         fepriv->status = 0;
2048                 }
2049                 break;
2050
2051         case FE_DISEQC_SEND_BURST:
2052                 if (fe->ops.diseqc_send_burst) {
2053                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2054                         fepriv->state = FESTATE_DISEQC;
2055                         fepriv->status = 0;
2056                 }
2057                 break;
2058
2059         case FE_SET_TONE:
2060                 if (fe->ops.set_tone) {
2061                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2062                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2063                         fepriv->state = FESTATE_DISEQC;
2064                         fepriv->status = 0;
2065                 }
2066                 break;
2067
2068         case FE_SET_VOLTAGE:
2069                 if (fe->ops.set_voltage) {
2070                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2071                         fepriv->voltage = (fe_sec_voltage_t) parg;
2072                         fepriv->state = FESTATE_DISEQC;
2073                         fepriv->status = 0;
2074                 }
2075                 break;
2076
2077         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2078                 if (fe->ops.dishnetwork_send_legacy_command) {
2079                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2080                         fepriv->state = FESTATE_DISEQC;
2081                         fepriv->status = 0;
2082                 } else if (fe->ops.set_voltage) {
2083                         /*
2084                          * NOTE: This is a fallback condition.  Some frontends
2085                          * (stv0299 for instance) take longer than 8msec to
2086                          * respond to a set_voltage command.  Those switches
2087                          * need custom routines to switch properly.  For all
2088                          * other frontends, the following should work ok.
2089                          * Dish network legacy switches (as used by Dish500)
2090                          * are controlled by sending 9-bit command words
2091                          * spaced 8msec apart.
2092                          * the actual command word is switch/port dependent
2093                          * so it is up to the userspace application to send
2094                          * the right command.
2095                          * The command must always start with a '0' after
2096                          * initialization, so parg is 8 bits and does not
2097                          * include the initialization or start bit
2098                          */
2099                         unsigned long swcmd = ((unsigned long) parg) << 1;
2100                         struct timeval nexttime;
2101                         struct timeval tv[10];
2102                         int i;
2103                         u8 last = 1;
2104                         if (dvb_frontend_debug)
2105                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2106                         do_gettimeofday(&nexttime);
2107                         if (dvb_frontend_debug)
2108                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
2109                         /* before sending a command, initialize by sending
2110                          * a 32ms 18V to the switch
2111                          */
2112                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2113                         dvb_frontend_sleep_until(&nexttime, 32000);
2114
2115                         for (i = 0; i < 9; i++) {
2116                                 if (dvb_frontend_debug)
2117                                         do_gettimeofday(&tv[i + 1]);
2118                                 if ((swcmd & 0x01) != last) {
2119                                         /* set voltage to (last ? 13V : 18V) */
2120                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2121                                         last = (last) ? 0 : 1;
2122                                 }
2123                                 swcmd = swcmd >> 1;
2124                                 if (i != 8)
2125                                         dvb_frontend_sleep_until(&nexttime, 8000);
2126                         }
2127                         if (dvb_frontend_debug) {
2128                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2129                                         __func__, fe->dvb->num);
2130                                 for (i = 1; i < 10; i++)
2131                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2132                         }
2133                         err = 0;
2134                         fepriv->state = FESTATE_DISEQC;
2135                         fepriv->status = 0;
2136                 }
2137                 break;
2138
2139         case FE_DISEQC_RECV_SLAVE_REPLY:
2140                 if (fe->ops.diseqc_recv_slave_reply)
2141                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2142                 break;
2143
2144         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2145                 if (fe->ops.enable_high_lnb_voltage)
2146                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2147                 break;
2148
2149         case FE_SET_FRONTEND:
2150                 err = set_delivery_system(fe, SYS_UNDEFINED);
2151                 if (err)
2152                         break;
2153
2154                 err = dtv_property_cache_sync(fe, c, parg);
2155                 if (err)
2156                         break;
2157                 err = dtv_set_frontend(fe);
2158                 break;
2159         case FE_GET_EVENT:
2160                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2161                 break;
2162
2163         case FE_GET_FRONTEND:
2164                 err = dtv_get_frontend(fe, parg);
2165                 break;
2166
2167         case FE_SET_FRONTEND_TUNE_MODE:
2168                 fepriv->tune_mode_flags = (unsigned long) parg;
2169                 err = 0;
2170                 break;
2171         };
2172
2173         if (fe->dvb->fe_ioctl_override) {
2174                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
2175                                                     DVB_FE_IOCTL_POST);
2176                 if (cb_err < 0)
2177                         return cb_err;
2178         }
2179
2180         return err;
2181 }
2182
2183
2184 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2185 {
2186         struct dvb_device *dvbdev = file->private_data;
2187         struct dvb_frontend *fe = dvbdev->priv;
2188         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2189
2190         dprintk ("%s\n", __func__);
2191
2192         poll_wait (file, &fepriv->events.wait_queue, wait);
2193
2194         if (fepriv->events.eventw != fepriv->events.eventr)
2195                 return (POLLIN | POLLRDNORM | POLLPRI);
2196
2197         return 0;
2198 }
2199
2200 static int dvb_frontend_open(struct inode *inode, struct file *file)
2201 {
2202         struct dvb_device *dvbdev = file->private_data;
2203         struct dvb_frontend *fe = dvbdev->priv;
2204         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2205         struct dvb_adapter *adapter = fe->dvb;
2206         int ret;
2207
2208         dprintk ("%s\n", __func__);
2209         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2210                 return -ENODEV;
2211
2212         if (adapter->mfe_shared) {
2213                 mutex_lock (&adapter->mfe_lock);
2214
2215                 if (adapter->mfe_dvbdev == NULL)
2216                         adapter->mfe_dvbdev = dvbdev;
2217
2218                 else if (adapter->mfe_dvbdev != dvbdev) {
2219                         struct dvb_device
2220                                 *mfedev = adapter->mfe_dvbdev;
2221                         struct dvb_frontend
2222                                 *mfe = mfedev->priv;
2223                         struct dvb_frontend_private
2224                                 *mfepriv = mfe->frontend_priv;
2225                         int mferetry = (dvb_mfe_wait_time << 1);
2226
2227                         mutex_unlock (&adapter->mfe_lock);
2228                         while (mferetry-- && (mfedev->users != -1 ||
2229                                         mfepriv->thread != NULL)) {
2230                                 if(msleep_interruptible(500)) {
2231                                         if(signal_pending(current))
2232                                                 return -EINTR;
2233                                 }
2234                         }
2235
2236                         mutex_lock (&adapter->mfe_lock);
2237                         if(adapter->mfe_dvbdev != dvbdev) {
2238                                 mfedev = adapter->mfe_dvbdev;
2239                                 mfe = mfedev->priv;
2240                                 mfepriv = mfe->frontend_priv;
2241                                 if (mfedev->users != -1 ||
2242                                                 mfepriv->thread != NULL) {
2243                                         mutex_unlock (&adapter->mfe_lock);
2244                                         return -EBUSY;
2245                                 }
2246                                 adapter->mfe_dvbdev = dvbdev;
2247                         }
2248                 }
2249         }
2250
2251         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2252                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2253                         goto err0;
2254
2255                 /* If we took control of the bus, we need to force
2256                    reinitialization.  This is because many ts_bus_ctrl()
2257                    functions strobe the RESET pin on the demod, and if the
2258                    frontend thread already exists then the dvb_init() routine
2259                    won't get called (which is what usually does initial
2260                    register configuration). */
2261                 fepriv->reinitialise = 1;
2262         }
2263
2264         if ((ret = dvb_generic_open (inode, file)) < 0)
2265                 goto err1;
2266
2267         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2268                 /* normal tune mode when opened R/W */
2269                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2270                 fepriv->tone = -1;
2271                 fepriv->voltage = -1;
2272
2273                 ret = dvb_frontend_start (fe);
2274                 if (ret)
2275                         goto err2;
2276
2277                 /*  empty event queue */
2278                 fepriv->events.eventr = fepriv->events.eventw = 0;
2279         }
2280
2281         if (adapter->mfe_shared)
2282                 mutex_unlock (&adapter->mfe_lock);
2283         return ret;
2284
2285 err2:
2286         dvb_generic_release(inode, file);
2287 err1:
2288         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2289                 fe->ops.ts_bus_ctrl(fe, 0);
2290 err0:
2291         if (adapter->mfe_shared)
2292                 mutex_unlock (&adapter->mfe_lock);
2293         return ret;
2294 }
2295
2296 static int dvb_frontend_release(struct inode *inode, struct file *file)
2297 {
2298         struct dvb_device *dvbdev = file->private_data;
2299         struct dvb_frontend *fe = dvbdev->priv;
2300         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2301         int ret;
2302
2303         dprintk ("%s\n", __func__);
2304
2305         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2306                 fepriv->release_jiffies = jiffies;
2307                 mb();
2308         }
2309
2310         ret = dvb_generic_release (inode, file);
2311
2312         if (dvbdev->users == -1) {
2313                 wake_up(&fepriv->wait_queue);
2314                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2315                         fops_put(file->f_op);
2316                         file->f_op = NULL;
2317                         wake_up(&dvbdev->wait_queue);
2318                 }
2319                 if (fe->ops.ts_bus_ctrl)
2320                         fe->ops.ts_bus_ctrl(fe, 0);
2321         }
2322
2323         return ret;
2324 }
2325
2326 static const struct file_operations dvb_frontend_fops = {
2327         .owner          = THIS_MODULE,
2328         .unlocked_ioctl = dvb_generic_ioctl,
2329         .poll           = dvb_frontend_poll,
2330         .open           = dvb_frontend_open,
2331         .release        = dvb_frontend_release,
2332         .llseek         = noop_llseek,
2333 };
2334
2335 int dvb_register_frontend(struct dvb_adapter* dvb,
2336                           struct dvb_frontend* fe)
2337 {
2338         struct dvb_frontend_private *fepriv;
2339         static const struct dvb_device dvbdev_template = {
2340                 .users = ~0,
2341                 .writers = 1,
2342                 .readers = (~0)-1,
2343                 .fops = &dvb_frontend_fops,
2344                 .kernel_ioctl = dvb_frontend_ioctl
2345         };
2346
2347         dprintk ("%s\n", __func__);
2348
2349         if (mutex_lock_interruptible(&frontend_mutex))
2350                 return -ERESTARTSYS;
2351
2352         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2353         if (fe->frontend_priv == NULL) {
2354                 mutex_unlock(&frontend_mutex);
2355                 return -ENOMEM;
2356         }
2357         fepriv = fe->frontend_priv;
2358
2359         sema_init(&fepriv->sem, 1);
2360         init_waitqueue_head (&fepriv->wait_queue);
2361         init_waitqueue_head (&fepriv->events.wait_queue);
2362         mutex_init(&fepriv->events.mtx);
2363         fe->dvb = dvb;
2364         fepriv->inversion = INVERSION_OFF;
2365
2366         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2367                 fe->dvb->num,
2368                 fe->id,
2369                 fe->ops.info.name);
2370
2371         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2372                              fe, DVB_DEVICE_FRONTEND);
2373
2374         /*
2375          * Initialize the cache to the proper values according with the
2376          * first supported delivery system (ops->delsys[0])
2377          */
2378
2379         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2380         dvb_frontend_clear_cache(fe);
2381
2382         mutex_unlock(&frontend_mutex);
2383         return 0;
2384 }
2385 EXPORT_SYMBOL(dvb_register_frontend);
2386
2387 int dvb_unregister_frontend(struct dvb_frontend* fe)
2388 {
2389         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2390         dprintk ("%s\n", __func__);
2391
2392         mutex_lock(&frontend_mutex);
2393         dvb_frontend_stop (fe);
2394         mutex_unlock(&frontend_mutex);
2395
2396         if (fepriv->dvbdev->users < -1)
2397                 wait_event(fepriv->dvbdev->wait_queue,
2398                                 fepriv->dvbdev->users==-1);
2399
2400         mutex_lock(&frontend_mutex);
2401         dvb_unregister_device (fepriv->dvbdev);
2402
2403         /* fe is invalid now */
2404         kfree(fepriv);
2405         mutex_unlock(&frontend_mutex);
2406         return 0;
2407 }
2408 EXPORT_SYMBOL(dvb_unregister_frontend);
2409
2410 #ifdef CONFIG_MEDIA_ATTACH
2411 void dvb_frontend_detach(struct dvb_frontend* fe)
2412 {
2413         void *ptr;
2414
2415         if (fe->ops.release_sec) {
2416                 fe->ops.release_sec(fe);
2417                 symbol_put_addr(fe->ops.release_sec);
2418         }
2419         if (fe->ops.tuner_ops.release) {
2420                 fe->ops.tuner_ops.release(fe);
2421                 symbol_put_addr(fe->ops.tuner_ops.release);
2422         }
2423         if (fe->ops.analog_ops.release) {
2424                 fe->ops.analog_ops.release(fe);
2425                 symbol_put_addr(fe->ops.analog_ops.release);
2426         }
2427         ptr = (void*)fe->ops.release;
2428         if (ptr) {
2429                 fe->ops.release(fe);
2430                 symbol_put_addr(ptr);
2431         }
2432 }
2433 #else
2434 void dvb_frontend_detach(struct dvb_frontend* fe)
2435 {
2436         if (fe->ops.release_sec)
2437                 fe->ops.release_sec(fe);
2438         if (fe->ops.tuner_ops.release)
2439                 fe->ops.tuner_ops.release(fe);
2440         if (fe->ops.analog_ops.release)
2441                 fe->ops.analog_ops.release(fe);
2442         if (fe->ops.release)
2443                 fe->ops.release(fe);
2444 }
2445 #endif
2446 EXPORT_SYMBOL(dvb_frontend_detach);