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 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 147                                            struct dvb_frontend_parameters *p);
 148
 149 static bool has_get_frontend(struct dvb_frontend *fe)
 150 {
 151         return fe->ops.get_frontend != NULL;
 152 }
 153
 154 /*
 155  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 156  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 157  * otherwise, a DVBv3 call will fail.
 158  */
 159 enum dvbv3_emulation_type {
 160         DVBV3_UNKNOWN,
 161         DVBV3_QPSK,
 162         DVBV3_QAM,
 163         DVBV3_OFDM,
 164         DVBV3_ATSC,
 165 };
 166
 167 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 168 {
 169         switch (delivery_system) {
 170         case SYS_DVBC_ANNEX_A:
 171         case SYS_DVBC_ANNEX_C:
 172                 return DVBV3_QAM;
 173         case SYS_DVBS:
 174         case SYS_DVBS2:
 175         case SYS_TURBO:
 176         case SYS_ISDBS:
 177         case SYS_DSS:
 178                 return DVBV3_QPSK;
 179         case SYS_DVBT:
 180         case SYS_DVBT2:
 181         case SYS_ISDBT:
 182         case SYS_DMBTH:
 183                 return DVBV3_OFDM;
 184         case SYS_ATSC:
 185         case SYS_ATSCMH:
 186         case SYS_DVBC_ANNEX_B:
 187                 return DVBV3_ATSC;
 188         case SYS_UNDEFINED:
 189         case SYS_ISDBC:
 190         case SYS_DVBH:
 191         case SYS_DAB:
 192         default:
 193                 /*
 194                  * Doesn't know how to emulate those types and/or
 195                  * there's no frontend driver from this type yet
 196                  * with some emulation code, so, we're not sure yet how
 197                  * to handle them, or they're not compatible with a DVBv3 call.
 198                  */
 199                 return DVBV3_UNKNOWN;
 200         }
 201 }
 202
 203 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 204 {
 205         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 206         struct dvb_fe_events *events = &fepriv->events;
 207         struct dvb_frontend_event *e;
 208         int wp;
 209
 210         dprintk ("%s\n", __func__);
 211
 212         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 213                 dtv_get_frontend(fe, &fepriv->parameters_out);
 214
 215         mutex_lock(&events->mtx);
 216
 217         wp = (events->eventw + 1) % MAX_EVENT;
 218         if (wp == events->eventr) {
 219                 events->overflow = 1;
 220                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 221         }
 222
 223         e = &events->events[events->eventw];
 224         e->status = status;
 225         e->parameters = fepriv->parameters_out;
 226
 227         events->eventw = wp;
 228
 229         mutex_unlock(&events->mtx);
 230
 231         wake_up_interruptible (&events->wait_queue);
 232 }
 233
 234 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 235                             struct dvb_frontend_event *event, int flags)
 236 {
 237         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 238         struct dvb_fe_events *events = &fepriv->events;
 239
 240         dprintk ("%s\n", __func__);
 241
 242         if (events->overflow) {
 243                 events->overflow = 0;
 244                 return -EOVERFLOW;
 245         }
 246
 247         if (events->eventw == events->eventr) {
 248                 int ret;
 249
 250                 if (flags & O_NONBLOCK)
 251                         return -EWOULDBLOCK;
 252
 253                 up(&fepriv->sem);
 254
 255                 ret = wait_event_interruptible (events->wait_queue,
 256                                                 events->eventw != events->eventr);
 257
 258                 if (down_interruptible (&fepriv->sem))
 259                         return -ERESTARTSYS;
 260
 261                 if (ret < 0)
 262                         return ret;
 263         }
 264
 265         mutex_lock(&events->mtx);
 266         *event = events->events[events->eventr];
 267         events->eventr = (events->eventr + 1) % MAX_EVENT;
 268         mutex_unlock(&events->mtx);
 269
 270         return 0;
 271 }
 272
 273 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 274 {
 275         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 276         struct dvb_fe_events *events = &fepriv->events;
 277
 278         mutex_lock(&events->mtx);
 279         events->eventr = events->eventw;
 280         mutex_unlock(&events->mtx);
 281 }
 282
 283 static void dvb_frontend_init(struct dvb_frontend *fe)
 284 {
 285         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 286                  fe->dvb->num,
 287                  fe->id,
 288                  fe->ops.info.name);
 289
 290         if (fe->ops.init)
 291                 fe->ops.init(fe);
 292         if (fe->ops.tuner_ops.init) {
 293                 if (fe->ops.i2c_gate_ctrl)
 294                         fe->ops.i2c_gate_ctrl(fe, 1);
 295                 fe->ops.tuner_ops.init(fe);
 296                 if (fe->ops.i2c_gate_ctrl)
 297                         fe->ops.i2c_gate_ctrl(fe, 0);
 298         }
 299 }
 300
 301 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 302 {
 303         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 304
 305         fepriv->reinitialise = 1;
 306         dvb_frontend_wakeup(fe);
 307 }
 308 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 309
 310 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 311 {
 312         int q2;
 313
 314         dprintk ("%s\n", __func__);
 315
 316         if (locked)
 317                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 318         else
 319                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 320
 321         q2 = fepriv->quality - 128;
 322         q2 *= q2;
 323
 324         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 325 }
 326
 327 /**
 328  * Performs automatic twiddling of frontend parameters.
 329  *
 330  * @param fe The frontend concerned.
 331  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 332  * @returns Number of complete iterations that have been performed.
 333  */
 334 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 335 {
 336         int autoinversion;
 337         int ready = 0;
 338         int fe_set_err = 0;
 339         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 340         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 341         int original_inversion = c->inversion;
 342         u32 original_frequency = c->frequency;
 343
 344         /* are we using autoinversion? */
 345         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 346                          (c->inversion == INVERSION_AUTO));
 347
 348         /* setup parameters correctly */
 349         while(!ready) {
 350                 /* calculate the lnb_drift */
 351                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 352
 353                 /* wrap the auto_step if we've exceeded the maximum drift */
 354                 if (fepriv->lnb_drift > fepriv->max_drift) {
 355                         fepriv->auto_step = 0;
 356                         fepriv->auto_sub_step = 0;
 357                         fepriv->lnb_drift = 0;
 358                 }
 359
 360                 /* perform inversion and +/- zigzag */
 361                 switch(fepriv->auto_sub_step) {
 362                 case 0:
 363                         /* try with the current inversion and current drift setting */
 364                         ready = 1;
 365                         break;
 366
 367                 case 1:
 368                         if (!autoinversion) break;
 369
 370                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 371                         ready = 1;
 372                         break;
 373
 374                 case 2:
 375                         if (fepriv->lnb_drift == 0) break;
 376
 377                         fepriv->lnb_drift = -fepriv->lnb_drift;
 378                         ready = 1;
 379                         break;
 380
 381                 case 3:
 382                         if (fepriv->lnb_drift == 0) break;
 383                         if (!autoinversion) break;
 384
 385                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 386                         fepriv->lnb_drift = -fepriv->lnb_drift;
 387                         ready = 1;
 388                         break;
 389
 390                 default:
 391                         fepriv->auto_step++;
 392                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 393                         break;
 394                 }
 395
 396                 if (!ready) fepriv->auto_sub_step++;
 397         }
 398
 399         /* if this attempt would hit where we started, indicate a complete
 400          * iteration has occurred */
 401         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 402             (fepriv->auto_sub_step == 0) && check_wrapped) {
 403                 return 1;
 404         }
 405
 406         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 407                 "auto_sub_step:%i started_auto_step:%i\n",
 408                 __func__, fepriv->lnb_drift, fepriv->inversion,
 409                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 410
 411         /* set the frontend itself */
 412         c->frequency += fepriv->lnb_drift;
 413         if (autoinversion)
 414                 c->inversion = fepriv->inversion;
 415         tmp = *c;
 416         if (fe->ops.set_frontend)
 417                 fe_set_err = fe->ops.set_frontend(fe);
 418         *c = tmp;
 419         if (fe_set_err < 0) {
 420                 fepriv->state = FESTATE_ERROR;
 421                 return fe_set_err;
 422         }
 423
 424         c->frequency = original_frequency;
 425         c->inversion = original_inversion;
 426
 427         fepriv->auto_sub_step++;
 428         return 0;
 429 }
 430
 431 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 432 {
 433         fe_status_t s = 0;
 434         int retval = 0;
 435         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 436         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 437
 438         /* if we've got no parameters, just keep idling */
 439         if (fepriv->state & FESTATE_IDLE) {
 440                 fepriv->delay = 3*HZ;
 441                 fepriv->quality = 0;
 442                 return;
 443         }
 444
 445         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 446         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 447                 if (fepriv->state & FESTATE_RETUNE) {
 448                         tmp = *c;
 449                         if (fe->ops.set_frontend)
 450                                 retval = fe->ops.set_frontend(fe);
 451                         *c = tmp;
 452                         if (retval < 0)
 453                                 fepriv->state = FESTATE_ERROR;
 454                         else
 455                                 fepriv->state = FESTATE_TUNED;
 456                 }
 457                 fepriv->delay = 3*HZ;
 458                 fepriv->quality = 0;
 459                 return;
 460         }
 461
 462         /* get the frontend status */
 463         if (fepriv->state & FESTATE_RETUNE) {
 464                 s = 0;
 465         } else {
 466                 if (fe->ops.read_status)
 467                         fe->ops.read_status(fe, &s);
 468                 if (s != fepriv->status) {
 469                         dvb_frontend_add_event(fe, s);
 470                         fepriv->status = s;
 471                 }
 472         }
 473
 474         /* if we're not tuned, and we have a lock, move to the TUNED state */
 475         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 476                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 477                 fepriv->state = FESTATE_TUNED;
 478
 479                 /* if we're tuned, then we have determined the correct inversion */
 480                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 481                     (c->inversion == INVERSION_AUTO)) {
 482                         c->inversion = fepriv->inversion;
 483                 }
 484                 return;
 485         }
 486
 487         /* if we are tuned already, check we're still locked */
 488         if (fepriv->state & FESTATE_TUNED) {
 489                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 490
 491                 /* we're tuned, and the lock is still good... */
 492                 if (s & FE_HAS_LOCK) {
 493                         return;
 494                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 495                         fepriv->state = FESTATE_ZIGZAG_FAST;
 496                         fepriv->started_auto_step = fepriv->auto_step;
 497                         fepriv->check_wrapped = 0;
 498                 }
 499         }
 500
 501         /* don't actually do anything if we're in the LOSTLOCK state,
 502          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 503         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 504             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 505                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 506                 return;
 507         }
 508
 509         /* don't do anything if we're in the DISEQC state, since this
 510          * might be someone with a motorized dish controlled by DISEQC.
 511          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 512         if (fepriv->state & FESTATE_DISEQC) {
 513                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 514                 return;
 515         }
 516
 517         /* if we're in the RETUNE state, set everything up for a brand
 518          * new scan, keeping the current inversion setting, as the next
 519          * tune is _very_ likely to require the same */
 520         if (fepriv->state & FESTATE_RETUNE) {
 521                 fepriv->lnb_drift = 0;
 522                 fepriv->auto_step = 0;
 523                 fepriv->auto_sub_step = 0;
 524                 fepriv->started_auto_step = 0;
 525                 fepriv->check_wrapped = 0;
 526         }
 527
 528         /* fast zigzag. */
 529         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 530                 fepriv->delay = fepriv->min_delay;
 531
 532                 /* perform a tune */
 533                 retval = dvb_frontend_swzigzag_autotune(fe,
 534                                                         fepriv->check_wrapped);
 535                 if (retval < 0) {
 536                         return;
 537                 } else if (retval) {
 538                         /* OK, if we've run out of trials at the fast speed.
 539                          * Drop back to slow for the _next_ attempt */
 540                         fepriv->state = FESTATE_SEARCHING_SLOW;
 541                         fepriv->started_auto_step = fepriv->auto_step;
 542                         return;
 543                 }
 544                 fepriv->check_wrapped = 1;
 545
 546                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 547                  * This ensures we cannot return from an
 548                  * FE_SET_FRONTEND ioctl before the first frontend tune
 549                  * occurs */
 550                 if (fepriv->state & FESTATE_RETUNE) {
 551                         fepriv->state = FESTATE_TUNING_FAST;
 552                 }
 553         }
 554
 555         /* slow zigzag */
 556         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 557                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 558
 559                 /* Note: don't bother checking for wrapping; we stay in this
 560                  * state until we get a lock */
 561                 dvb_frontend_swzigzag_autotune(fe, 0);
 562         }
 563 }
 564
 565 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 566 {
 567         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 568
 569         if (fepriv->exit != DVB_FE_NO_EXIT)
 570                 return 1;
 571
 572         if (fepriv->dvbdev->writers == 1)
 573                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 574                                   dvb_shutdown_timeout * HZ))
 575                         return 1;
 576
 577         return 0;
 578 }
 579
 580 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 581 {
 582         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 583
 584         if (fepriv->wakeup) {
 585                 fepriv->wakeup = 0;
 586                 return 1;
 587         }
 588         return dvb_frontend_is_exiting(fe);
 589 }
 590
 591 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 592 {
 593         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 594
 595         fepriv->wakeup = 1;
 596         wake_up_interruptible(&fepriv->wait_queue);
 597 }
 598
 599 static int dvb_frontend_thread(void *data)
 600 {
 601         struct dvb_frontend *fe = data;
 602         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 603         fe_status_t s;
 604         enum dvbfe_algo algo;
 605
 606         bool re_tune = false;
 607
 608         dprintk("%s\n", __func__);
 609
 610         fepriv->check_wrapped = 0;
 611         fepriv->quality = 0;
 612         fepriv->delay = 3*HZ;
 613         fepriv->status = 0;
 614         fepriv->wakeup = 0;
 615         fepriv->reinitialise = 0;
 616
 617         dvb_frontend_init(fe);
 618
 619         set_freezable();
 620         while (1) {
 621                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 622 restart:
 623                 wait_event_interruptible_timeout(fepriv->wait_queue,
 624                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 625                                 || freezing(current),
 626                         fepriv->delay);
 627
 628                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 629                         /* got signal or quitting */
 630                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 631                         break;
 632                 }
 633
 634                 if (try_to_freeze())
 635                         goto restart;
 636
 637                 if (down_interruptible(&fepriv->sem))
 638                         break;
 639
 640                 if (fepriv->reinitialise) {
 641                         dvb_frontend_init(fe);
 642                         if (fe->ops.set_tone && fepriv->tone != -1)
 643                                 fe->ops.set_tone(fe, fepriv->tone);
 644                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 645                                 fe->ops.set_voltage(fe, fepriv->voltage);
 646                         fepriv->reinitialise = 0;
 647                 }
 648
 649                 /* do an iteration of the tuning loop */
 650                 if (fe->ops.get_frontend_algo) {
 651                         algo = fe->ops.get_frontend_algo(fe);
 652                         switch (algo) {
 653                         case DVBFE_ALGO_HW:
 654                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 655
 656                                 if (fepriv->state & FESTATE_RETUNE) {
 657                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 658                                         re_tune = true;
 659                                         fepriv->state = FESTATE_TUNED;
 660                                 } else {
 661                                         re_tune = false;
 662                                 }
 663
 664                                 if (fe->ops.tune)
 665                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 666
 667                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 668                                         dprintk("%s: state changed, adding current state\n", __func__);
 669                                         dvb_frontend_add_event(fe, s);
 670                                         fepriv->status = s;
 671                                 }
 672                                 break;
 673                         case DVBFE_ALGO_SW:
 674                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 675                                 dvb_frontend_swzigzag(fe);
 676                                 break;
 677                         case DVBFE_ALGO_CUSTOM:
 678                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 679                                 if (fepriv->state & FESTATE_RETUNE) {
 680                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 681                                         fepriv->state = FESTATE_TUNED;
 682                                 }
 683                                 /* Case where we are going to search for a carrier
 684                                  * User asked us to retune again for some reason, possibly
 685                                  * requesting a search with a new set of parameters
 686                                  */
 687                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 688                                         if (fe->ops.search) {
 689                                                 fepriv->algo_status = fe->ops.search(fe);
 690                                                 /* We did do a search as was requested, the flags are
 691                                                  * now unset as well and has the flags wrt to search.
 692                                                  */
 693                                         } else {
 694                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 695                                         }
 696                                 }
 697                                 /* Track the carrier if the search was successful */
 698                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 699                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 700                                         fepriv->delay = HZ / 2;
 701                                 }
 702                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
 703                                 fe->ops.read_status(fe, &s);
 704                                 if (s != fepriv->status) {
 705                                         dvb_frontend_add_event(fe, s); /* update event list */
 706                                         fepriv->status = s;
 707                                         if (!(s & FE_HAS_LOCK)) {
 708                                                 fepriv->delay = HZ / 10;
 709                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 710                                         } else {
 711                                                 fepriv->delay = 60 * HZ;
 712                                         }
 713                                 }
 714                                 break;
 715                         default:
 716                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 717                                 break;
 718                         }
 719                 } else {
 720                         dvb_frontend_swzigzag(fe);
 721                 }
 722         }
 723
 724         if (dvb_powerdown_on_sleep) {
 725                 if (fe->ops.set_voltage)
 726                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 727                 if (fe->ops.tuner_ops.sleep) {
 728                         if (fe->ops.i2c_gate_ctrl)
 729                                 fe->ops.i2c_gate_ctrl(fe, 1);
 730                         fe->ops.tuner_ops.sleep(fe);
 731                         if (fe->ops.i2c_gate_ctrl)
 732                                 fe->ops.i2c_gate_ctrl(fe, 0);
 733                 }
 734                 if (fe->ops.sleep)
 735                         fe->ops.sleep(fe);
 736         }
 737
 738         fepriv->thread = NULL;
 739         if (kthread_should_stop())
 740                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 741         else
 742                 fepriv->exit = DVB_FE_NO_EXIT;
 743         mb();
 744
 745         dvb_frontend_wakeup(fe);
 746         return 0;
 747 }
 748
 749 static void dvb_frontend_stop(struct dvb_frontend *fe)
 750 {
 751         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 752
 753         dprintk ("%s\n", __func__);
 754
 755         fepriv->exit = DVB_FE_NORMAL_EXIT;
 756         mb();
 757
 758         if (!fepriv->thread)
 759                 return;
 760
 761         kthread_stop(fepriv->thread);
 762
 763         sema_init(&fepriv->sem, 1);
 764         fepriv->state = FESTATE_IDLE;
 765
 766         /* paranoia check in case a signal arrived */
 767         if (fepriv->thread)
 768                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 769                                 fepriv->thread);
 770 }
 771
 772 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 773 {
 774         return ((curtime.tv_usec < lasttime.tv_usec) ?
 775                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 776                 curtime.tv_usec - lasttime.tv_usec);
 777 }
 778 EXPORT_SYMBOL(timeval_usec_diff);
 779
 780 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 781 {
 782         curtime->tv_usec += add_usec;
 783         if (curtime->tv_usec >= 1000000) {
 784                 curtime->tv_usec -= 1000000;
 785                 curtime->tv_sec++;
 786         }
 787 }
 788
 789 /*
 790  * Sleep until gettimeofday() > waketime + add_usec
 791  * This needs to be as precise as possible, but as the delay is
 792  * usually between 2ms and 32ms, it is done using a scheduled msleep
 793  * followed by usleep (normally a busy-wait loop) for the remainder
 794  */
 795 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 796 {
 797         struct timeval lasttime;
 798         s32 delta, newdelta;
 799
 800         timeval_usec_add(waketime, add_usec);
 801
 802         do_gettimeofday(&lasttime);
 803         delta = timeval_usec_diff(lasttime, *waketime);
 804         if (delta > 2500) {
 805                 msleep((delta - 1500) / 1000);
 806                 do_gettimeofday(&lasttime);
 807                 newdelta = timeval_usec_diff(lasttime, *waketime);
 808                 delta = (newdelta > delta) ? 0 : newdelta;
 809         }
 810         if (delta > 0)
 811                 udelay(delta);
 812 }
 813 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 814
 815 static int dvb_frontend_start(struct dvb_frontend *fe)
 816 {
 817         int ret;
 818         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 819         struct task_struct *fe_thread;
 820
 821         dprintk ("%s\n", __func__);
 822
 823         if (fepriv->thread) {
 824                 if (fepriv->exit == DVB_FE_NO_EXIT)
 825                         return 0;
 826                 else
 827                         dvb_frontend_stop (fe);
 828         }
 829
 830         if (signal_pending(current))
 831                 return -EINTR;
 832         if (down_interruptible (&fepriv->sem))
 833                 return -EINTR;
 834
 835         fepriv->state = FESTATE_IDLE;
 836         fepriv->exit = DVB_FE_NO_EXIT;
 837         fepriv->thread = NULL;
 838         mb();
 839
 840         fe_thread = kthread_run(dvb_frontend_thread, fe,
 841                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 842         if (IS_ERR(fe_thread)) {
 843                 ret = PTR_ERR(fe_thread);
 844                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 845                 up(&fepriv->sem);
 846                 return ret;
 847         }
 848         fepriv->thread = fe_thread;
 849         return 0;
 850 }
 851
 852 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 853                                         u32 *freq_min, u32 *freq_max)
 854 {
 855         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 856
 857         if (fe->ops.info.frequency_max == 0)
 858                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 859         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 860                 *freq_max = fe->ops.info.frequency_max;
 861         else
 862                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 863
 864         if (*freq_min == 0 || *freq_max == 0)
 865                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 866                        fe->dvb->num,fe->id);
 867 }
 868
 869 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 870 {
 871         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 872         u32 freq_min;
 873         u32 freq_max;
 874
 875         /* range check: frequency */
 876         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 877         if ((freq_min && c->frequency < freq_min) ||
 878             (freq_max && c->frequency > freq_max)) {
 879                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 880                        fe->dvb->num, fe->id, c->frequency, freq_min, freq_max);
 881                 return -EINVAL;
 882         }
 883
 884         /* range check: symbol rate */
 885         switch (c->delivery_system) {
 886         case SYS_DVBS:
 887         case SYS_DVBS2:
 888         case SYS_TURBO:
 889         case SYS_DVBC_ANNEX_A:
 890         case SYS_DVBC_ANNEX_C:
 891                 if ((fe->ops.info.symbol_rate_min &&
 892                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 893                     (fe->ops.info.symbol_rate_max &&
 894                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 895                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 896                                fe->dvb->num, fe->id, c->symbol_rate,
 897                                fe->ops.info.symbol_rate_min,
 898                                fe->ops.info.symbol_rate_max);
 899                         return -EINVAL;
 900                 }
 901         default:
 902                 break;
 903         }
 904
 905         return 0;
 906 }
 907
 908 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 909 {
 910         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 911         int i;
 912         u32 delsys;
 913
 914         delsys = c->delivery_system;
 915         memset(c, 0, sizeof(struct dtv_frontend_properties));
 916         c->delivery_system = delsys;
 917
 918         c->state = DTV_CLEAR;
 919
 920         dprintk("%s() Clearing cache for delivery system %d\n", __func__,
 921                 c->delivery_system);
 922
 923         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 924         c->bandwidth_hz = 0;    /* AUTO */
 925         c->guard_interval = GUARD_INTERVAL_AUTO;
 926         c->hierarchy = HIERARCHY_AUTO;
 927         c->symbol_rate = 0;
 928         c->code_rate_HP = FEC_AUTO;
 929         c->code_rate_LP = FEC_AUTO;
 930         c->fec_inner = FEC_AUTO;
 931         c->rolloff = ROLLOFF_AUTO;
 932         c->voltage = SEC_VOLTAGE_OFF;
 933         c->sectone = SEC_TONE_OFF;
 934         c->pilot = PILOT_AUTO;
 935
 936         c->isdbt_partial_reception = 0;
 937         c->isdbt_sb_mode = 0;
 938         c->isdbt_sb_subchannel = 0;
 939         c->isdbt_sb_segment_idx = 0;
 940         c->isdbt_sb_segment_count = 0;
 941         c->isdbt_layer_enabled = 0;
 942         for (i = 0; i < 3; i++) {
 943                 c->layer[i].fec = FEC_AUTO;
 944                 c->layer[i].modulation = QAM_AUTO;
 945                 c->layer[i].interleaving = 0;
 946                 c->layer[i].segment_count = 0;
 947         }
 948
 949         c->isdbs_ts_id = 0;
 950         c->dvbt2_plp_id = 0;
 951
 952         switch (c->delivery_system) {
 953         case SYS_DVBS:
 954         case SYS_DVBS2:
 955         case SYS_TURBO:
 956                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 957                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 958                 break;
 959         case SYS_ATSC:
 960                 c->modulation = VSB_8;
 961                 break;
 962         default:
 963                 c->modulation = QAM_AUTO;
 964                 break;
 965         }
 966
 967         return 0;
 968 }
 969
 970 #define _DTV_CMD(n, s, b) \
 971 [n] = { \
 972         .name = #n, \
 973         .cmd  = n, \
 974         .set  = s,\
 975         .buffer = b \
 976 }
 977
 978 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 979         _DTV_CMD(DTV_TUNE, 1, 0),
 980         _DTV_CMD(DTV_CLEAR, 1, 0),
 981
 982         /* Set */
 983         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 984         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 985         _DTV_CMD(DTV_MODULATION, 1, 0),
 986         _DTV_CMD(DTV_INVERSION, 1, 0),
 987         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 988         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 989         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 990         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 991         _DTV_CMD(DTV_TONE, 1, 0),
 992         _DTV_CMD(DTV_PILOT, 1, 0),
 993         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 994         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 995         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 996         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 997         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 998         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 999         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1000
1001         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1002         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1003         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1004         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1005         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1006         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1007         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1008         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1009         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1010         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1011         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1012         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1013         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1014         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1015         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1016         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1017         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1018         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1019
1020         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
1021         _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
1022
1023         /* Get */
1024         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1025         _DTV_CMD(DTV_API_VERSION, 0, 0),
1026         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
1027         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
1028         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
1029         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
1030         _DTV_CMD(DTV_HIERARCHY, 0, 0),
1031
1032         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1033
1034         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1035         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1036
1037         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1038         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 0, 0),
1039         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1040         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1041         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1042         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1043         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1044         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 0, 0),
1045         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1046         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1047         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1048         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1049         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1050         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1051         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1052 };
1053
1054 static void dtv_property_dump(struct dtv_property *tvp)
1055 {
1056         int i;
1057
1058         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1059                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1060                         __func__, tvp->cmd);
1061                 return;
1062         }
1063
1064         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
1065                 ,__func__
1066                 ,tvp->cmd
1067                 ,dtv_cmds[ tvp->cmd ].name);
1068
1069         if(dtv_cmds[ tvp->cmd ].buffer) {
1070
1071                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1072                         ,__func__
1073                         ,tvp->u.buffer.len);
1074
1075                 for(i = 0; i < tvp->u.buffer.len; i++)
1076                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1077                                 ,__func__
1078                                 ,i
1079                                 ,tvp->u.buffer.data[i]);
1080
1081         } else
1082                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1083 }
1084
1085 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1086  * drivers can use a single set_frontend tuning function, regardless of whether
1087  * it's being used for the legacy or new API, reducing code and complexity.
1088  */
1089 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1090                                    struct dtv_frontend_properties *c,
1091                                    const struct dvb_frontend_parameters *p)
1092 {
1093         c->frequency = p->frequency;
1094         c->inversion = p->inversion;
1095
1096         switch (dvbv3_type(c->delivery_system)) {
1097         case DVBV3_QPSK:
1098                 dprintk("%s() Preparing QPSK req\n", __func__);
1099                 c->symbol_rate = p->u.qpsk.symbol_rate;
1100                 c->fec_inner = p->u.qpsk.fec_inner;
1101                 break;
1102         case DVBV3_QAM:
1103                 dprintk("%s() Preparing QAM req\n", __func__);
1104                 c->symbol_rate = p->u.qam.symbol_rate;
1105                 c->fec_inner = p->u.qam.fec_inner;
1106                 c->modulation = p->u.qam.modulation;
1107                 break;
1108         case DVBV3_OFDM:
1109                 dprintk("%s() Preparing OFDM req\n", __func__);
1110                 switch (p->u.ofdm.bandwidth) {
1111                 case BANDWIDTH_10_MHZ:
1112                         c->bandwidth_hz = 10000000;
1113                         break;
1114                 case BANDWIDTH_8_MHZ:
1115                         c->bandwidth_hz = 8000000;
1116                         break;
1117                 case BANDWIDTH_7_MHZ:
1118                         c->bandwidth_hz = 7000000;
1119                         break;
1120                 case BANDWIDTH_6_MHZ:
1121                         c->bandwidth_hz = 6000000;
1122                         break;
1123                 case BANDWIDTH_5_MHZ:
1124                         c->bandwidth_hz = 5000000;
1125                         break;
1126                 case BANDWIDTH_1_712_MHZ:
1127                         c->bandwidth_hz = 1712000;
1128                         break;
1129                 case BANDWIDTH_AUTO:
1130                         c->bandwidth_hz = 0;
1131                 }
1132
1133                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1134                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1135                 c->modulation = p->u.ofdm.constellation;
1136                 c->transmission_mode = p->u.ofdm.transmission_mode;
1137                 c->guard_interval = p->u.ofdm.guard_interval;
1138                 c->hierarchy = p->u.ofdm.hierarchy_information;
1139                 break;
1140         case DVBV3_ATSC:
1141                 dprintk("%s() Preparing ATSC req\n", __func__);
1142                 c->modulation = p->u.vsb.modulation;
1143                 if (c->delivery_system == SYS_ATSCMH)
1144                         break;
1145                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1146                         c->delivery_system = SYS_ATSC;
1147                 else
1148                         c->delivery_system = SYS_DVBC_ANNEX_B;
1149                 break;
1150         case DVBV3_UNKNOWN:
1151                 printk(KERN_ERR
1152                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1153                        __func__, c->delivery_system);
1154                 return -EINVAL;
1155         }
1156
1157         return 0;
1158 }
1159
1160 /* Ensure the cached values are set correctly in the frontend
1161  * legacy tuning structures, for the advanced tuning API.
1162  */
1163 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1164                                             struct dvb_frontend_parameters *p)
1165 {
1166         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1167
1168         p->frequency = c->frequency;
1169         p->inversion = c->inversion;
1170
1171         switch (dvbv3_type(c->delivery_system)) {
1172         case DVBV3_UNKNOWN:
1173                 printk(KERN_ERR
1174                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1175                        __func__, c->delivery_system);
1176                 return -EINVAL;
1177         case DVBV3_QPSK:
1178                 dprintk("%s() Preparing QPSK req\n", __func__);
1179                 p->u.qpsk.symbol_rate = c->symbol_rate;
1180                 p->u.qpsk.fec_inner = c->fec_inner;
1181                 break;
1182         case DVBV3_QAM:
1183                 dprintk("%s() Preparing QAM req\n", __func__);
1184                 p->u.qam.symbol_rate = c->symbol_rate;
1185                 p->u.qam.fec_inner = c->fec_inner;
1186                 p->u.qam.modulation = c->modulation;
1187                 break;
1188         case DVBV3_OFDM:
1189                 dprintk("%s() Preparing OFDM req\n", __func__);
1190
1191                 switch (c->bandwidth_hz) {
1192                 case 10000000:
1193                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1194                         break;
1195                 case 8000000:
1196                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1197                         break;
1198                 case 7000000:
1199                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1200                         break;
1201                 case 6000000:
1202                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1203                         break;
1204                 case 5000000:
1205                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1206                         break;
1207                 case 1712000:
1208                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1209                         break;
1210                 case 0:
1211                 default:
1212                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1213                 }
1214                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1215                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1216                 p->u.ofdm.constellation = c->modulation;
1217                 p->u.ofdm.transmission_mode = c->transmission_mode;
1218                 p->u.ofdm.guard_interval = c->guard_interval;
1219                 p->u.ofdm.hierarchy_information = c->hierarchy;
1220                 break;
1221         case DVBV3_ATSC:
1222                 dprintk("%s() Preparing VSB req\n", __func__);
1223                 p->u.vsb.modulation = c->modulation;
1224                 break;
1225         }
1226         return 0;
1227 }
1228
1229 /**
1230  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1231  * @fe:         struct dvb_frontend pointer
1232  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1233  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1234  *
1235  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1236  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1237  * If p_out is not null, it will update the DVBv3 params pointed by it.
1238  */
1239 static int dtv_get_frontend(struct dvb_frontend *fe,
1240                             struct dvb_frontend_parameters *p_out)
1241 {
1242         int r;
1243
1244         if (fe->ops.get_frontend) {
1245                 r = fe->ops.get_frontend(fe);
1246                 if (unlikely(r < 0))
1247                         return r;
1248                 if (p_out)
1249                         dtv_property_legacy_params_sync(fe, p_out);
1250                 return 0;
1251         }
1252
1253         /* As everything is in cache, get_frontend fops are always supported */
1254         return 0;
1255 }
1256
1257 static int dvb_frontend_ioctl_legacy(struct file *file,
1258                         unsigned int cmd, void *parg);
1259 static int dvb_frontend_ioctl_properties(struct file *file,
1260                         unsigned int cmd, void *parg);
1261
1262 static int dtv_property_process_get(struct dvb_frontend *fe,
1263                                     const struct dtv_frontend_properties *c,
1264                                     struct dtv_property *tvp,
1265                                     struct file *file)
1266 {
1267         int r, ncaps;
1268
1269         switch(tvp->cmd) {
1270         case DTV_ENUM_DELSYS:
1271                 ncaps = 0;
1272                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1273                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1274                         ncaps++;
1275                 }
1276                 tvp->u.buffer.len = ncaps;
1277                 break;
1278         case DTV_FREQUENCY:
1279                 tvp->u.data = c->frequency;
1280                 break;
1281         case DTV_MODULATION:
1282                 tvp->u.data = c->modulation;
1283                 break;
1284         case DTV_BANDWIDTH_HZ:
1285                 tvp->u.data = c->bandwidth_hz;
1286                 break;
1287         case DTV_INVERSION:
1288                 tvp->u.data = c->inversion;
1289                 break;
1290         case DTV_SYMBOL_RATE:
1291                 tvp->u.data = c->symbol_rate;
1292                 break;
1293         case DTV_INNER_FEC:
1294                 tvp->u.data = c->fec_inner;
1295                 break;
1296         case DTV_PILOT:
1297                 tvp->u.data = c->pilot;
1298                 break;
1299         case DTV_ROLLOFF:
1300                 tvp->u.data = c->rolloff;
1301                 break;
1302         case DTV_DELIVERY_SYSTEM:
1303                 tvp->u.data = c->delivery_system;
1304                 break;
1305         case DTV_VOLTAGE:
1306                 tvp->u.data = c->voltage;
1307                 break;
1308         case DTV_TONE:
1309                 tvp->u.data = c->sectone;
1310                 break;
1311         case DTV_API_VERSION:
1312                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1313                 break;
1314         case DTV_CODE_RATE_HP:
1315                 tvp->u.data = c->code_rate_HP;
1316                 break;
1317         case DTV_CODE_RATE_LP:
1318                 tvp->u.data = c->code_rate_LP;
1319                 break;
1320         case DTV_GUARD_INTERVAL:
1321                 tvp->u.data = c->guard_interval;
1322                 break;
1323         case DTV_TRANSMISSION_MODE:
1324                 tvp->u.data = c->transmission_mode;
1325                 break;
1326         case DTV_HIERARCHY:
1327                 tvp->u.data = c->hierarchy;
1328                 break;
1329
1330         /* ISDB-T Support here */
1331         case DTV_ISDBT_PARTIAL_RECEPTION:
1332                 tvp->u.data = c->isdbt_partial_reception;
1333                 break;
1334         case DTV_ISDBT_SOUND_BROADCASTING:
1335                 tvp->u.data = c->isdbt_sb_mode;
1336                 break;
1337         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1338                 tvp->u.data = c->isdbt_sb_subchannel;
1339                 break;
1340         case DTV_ISDBT_SB_SEGMENT_IDX:
1341                 tvp->u.data = c->isdbt_sb_segment_idx;
1342                 break;
1343         case DTV_ISDBT_SB_SEGMENT_COUNT:
1344                 tvp->u.data = c->isdbt_sb_segment_count;
1345                 break;
1346         case DTV_ISDBT_LAYER_ENABLED:
1347                 tvp->u.data = c->isdbt_layer_enabled;
1348                 break;
1349         case DTV_ISDBT_LAYERA_FEC:
1350                 tvp->u.data = c->layer[0].fec;
1351                 break;
1352         case DTV_ISDBT_LAYERA_MODULATION:
1353                 tvp->u.data = c->layer[0].modulation;
1354                 break;
1355         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1356                 tvp->u.data = c->layer[0].segment_count;
1357                 break;
1358         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1359                 tvp->u.data = c->layer[0].interleaving;
1360                 break;
1361         case DTV_ISDBT_LAYERB_FEC:
1362                 tvp->u.data = c->layer[1].fec;
1363                 break;
1364         case DTV_ISDBT_LAYERB_MODULATION:
1365                 tvp->u.data = c->layer[1].modulation;
1366                 break;
1367         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1368                 tvp->u.data = c->layer[1].segment_count;
1369                 break;
1370         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1371                 tvp->u.data = c->layer[1].interleaving;
1372                 break;
1373         case DTV_ISDBT_LAYERC_FEC:
1374                 tvp->u.data = c->layer[2].fec;
1375                 break;
1376         case DTV_ISDBT_LAYERC_MODULATION:
1377                 tvp->u.data = c->layer[2].modulation;
1378                 break;
1379         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1380                 tvp->u.data = c->layer[2].segment_count;
1381                 break;
1382         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1383                 tvp->u.data = c->layer[2].interleaving;
1384                 break;
1385         case DTV_ISDBS_TS_ID:
1386                 tvp->u.data = c->isdbs_ts_id;
1387                 break;
1388         case DTV_DVBT2_PLP_ID:
1389                 tvp->u.data = c->dvbt2_plp_id;
1390                 break;
1391
1392         /* ATSC-MH */
1393         case DTV_ATSCMH_FIC_VER:
1394                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1395                 break;
1396         case DTV_ATSCMH_PARADE_ID:
1397                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1398                 break;
1399         case DTV_ATSCMH_NOG:
1400                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1401                 break;
1402         case DTV_ATSCMH_TNOG:
1403                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1404                 break;
1405         case DTV_ATSCMH_SGN:
1406                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1407                 break;
1408         case DTV_ATSCMH_PRC:
1409                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1410                 break;
1411         case DTV_ATSCMH_RS_FRAME_MODE:
1412                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1413                 break;
1414         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1415                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1416                 break;
1417         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1418                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1419                 break;
1420         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1421                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1422                 break;
1423         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1424                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1425                 break;
1426         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1427                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1428                 break;
1429         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1430                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1431                 break;
1432         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1433                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1434                 break;
1435         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1436                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1437                 break;
1438
1439         default:
1440                 return -EINVAL;
1441         }
1442
1443         /* Allow the frontend to override outgoing properties */
1444         if (fe->ops.get_property) {
1445                 r = fe->ops.get_property(fe, tvp);
1446                 if (r < 0)
1447                         return r;
1448         }
1449
1450         dtv_property_dump(tvp);
1451
1452         return 0;
1453 }
1454
1455 static int dtv_set_frontend(struct dvb_frontend *fe);
1456
1457 static bool is_dvbv3_delsys(u32 delsys)
1458 {
1459         bool status;
1460
1461         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1462                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1463
1464         return status;
1465 }
1466
1467 static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system)
1468 {
1469         int ncaps, i;
1470         u32 delsys = SYS_UNDEFINED;
1471         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1472         enum dvbv3_emulation_type type;
1473
1474         /*
1475          * It was reported that some old DVBv5 applications were
1476          * filling delivery_system with SYS_UNDEFINED. If this happens,
1477          * assume that the application wants to use the first supported
1478          * delivery system.
1479          */
1480         if (c->delivery_system == SYS_UNDEFINED)
1481                 c->delivery_system = fe->ops.delsys[0];
1482
1483         if (desired_system == SYS_UNDEFINED) {
1484                 /*
1485                  * A DVBv3 call doesn't know what's the desired system.
1486                  * Also, DVBv3 applications don't know that ops.info->type
1487                  * could be changed, and they simply dies when it doesn't
1488                  * match.
1489                  * So, don't change the current delivery system, as it
1490                  * may be trying to do the wrong thing, like setting an
1491                  * ISDB-T frontend as DVB-T. Instead, find the closest
1492                  * DVBv3 system that matches the delivery system.
1493                  */
1494                 if (is_dvbv3_delsys(c->delivery_system)) {
1495                         dprintk("%s() Using delivery system to %d\n",
1496                                 __func__, c->delivery_system);
1497                         return 0;
1498                 }
1499                 type = dvbv3_type(c->delivery_system);
1500                 switch (type) {
1501                 case DVBV3_QPSK:
1502                         desired_system = SYS_DVBS;
1503                         break;
1504                 case DVBV3_QAM:
1505                         desired_system = SYS_DVBC_ANNEX_A;
1506                         break;
1507                 case DVBV3_ATSC:
1508                         desired_system = SYS_ATSC;
1509                         break;
1510                 case DVBV3_OFDM:
1511                         desired_system = SYS_DVBT;
1512                         break;
1513                 default:
1514                         dprintk("%s(): This frontend doesn't support DVBv3 calls\n",
1515                                 __func__);
1516                         return -EINVAL;
1517                 }
1518                 /*
1519                  * Get a delivery system that is compatible with DVBv3
1520                  * NOTE: in order for this to work with softwares like Kaffeine that
1521                  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1522                  *      DVB-S, drivers that support both should put the SYS_DVBS entry
1523                  *      before the SYS_DVBS2, otherwise it won't switch back to DVB-S.
1524                  *      The real fix is that userspace applications should not use DVBv3
1525                  *      and not trust on calling FE_SET_FRONTEND to switch the delivery
1526                  *      system.
1527                  */
1528                 ncaps = 0;
1529                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1530                         if (fe->ops.delsys[ncaps] == desired_system) {
1531                                 delsys = desired_system;
1532                                 break;
1533                         }
1534                         ncaps++;
1535                 }
1536                 if (delsys == SYS_UNDEFINED) {
1537                         dprintk("%s() Couldn't find a delivery system that matches %d\n",
1538                                 __func__, desired_system);
1539                 }
1540         } else {
1541                 /*
1542                  * This is a DVBv5 call. So, it likely knows the supported
1543                  * delivery systems.
1544                  */
1545
1546                 /* Check if the desired delivery system is supported */
1547                 ncaps = 0;
1548                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1549                         if (fe->ops.delsys[ncaps] == desired_system) {
1550                                 c->delivery_system = desired_system;
1551                                 dprintk("%s() Changing delivery system to %d\n",
1552                                         __func__, desired_system);
1553                                 return 0;
1554                         }
1555                         ncaps++;
1556                 }
1557                 type = dvbv3_type(desired_system);
1558
1559                 /*
1560                  * The delivery system is not supported. See if it can be
1561                  * emulated.
1562                  * The emulation only works if the desired system is one of the
1563                  * DVBv3 delivery systems
1564                  */
1565                 if (!is_dvbv3_delsys(desired_system)) {
1566                         dprintk("%s() can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n",
1567                                 __func__);
1568                         return -EINVAL;
1569                 }
1570
1571                 /*
1572                  * Get the last non-DVBv3 delivery system that has the same type
1573                  * of the desired system
1574                  */
1575                 ncaps = 0;
1576                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1577                         if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) &&
1578                             !is_dvbv3_delsys(fe->ops.delsys[ncaps]))
1579                                 delsys = fe->ops.delsys[ncaps];
1580                         ncaps++;
1581                 }
1582                 /* There's nothing compatible with the desired delivery system */
1583                 if (delsys == SYS_UNDEFINED) {
1584                         dprintk("%s() Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n",
1585                                 __func__);
1586                         return -EINVAL;
1587                 }
1588         }
1589
1590         c->delivery_system = delsys;
1591
1592         /*
1593          * The DVBv3 or DVBv5 call is requesting a different system. So,
1594          * emulation is needed.
1595          *
1596          * Emulate newer delivery systems like ISDBT, DVBT and DMBTH
1597          * for older DVBv5 applications. The emulation will try to use
1598          * the auto mode for most things, and will assume that the desired
1599          * delivery system is the last one at the ops.delsys[] array
1600          */
1601         dprintk("%s() Using delivery system %d emulated as if it were a %d\n",
1602                 __func__, delsys, desired_system);
1603
1604         /*
1605          * For now, handles ISDB-T calls. More code may be needed here for the
1606          * other emulated stuff
1607          */
1608         if (type == DVBV3_OFDM) {
1609                 if (c->delivery_system == SYS_ISDBT) {
1610                         dprintk("%s() Using defaults for SYS_ISDBT\n",
1611                                 __func__);
1612                         if (!c->bandwidth_hz)
1613                                 c->bandwidth_hz = 6000000;
1614
1615                         c->isdbt_partial_reception = 0;
1616                         c->isdbt_sb_mode = 0;
1617                         c->isdbt_sb_subchannel = 0;
1618                         c->isdbt_sb_segment_idx = 0;
1619                         c->isdbt_sb_segment_count = 0;
1620                         c->isdbt_layer_enabled = 0;
1621                         for (i = 0; i < 3; i++) {
1622                                 c->layer[i].fec = FEC_AUTO;
1623                                 c->layer[i].modulation = QAM_AUTO;
1624                                 c->layer[i].interleaving = 0;
1625                                 c->layer[i].segment_count = 0;
1626                         }
1627                 }
1628         }
1629         dprintk("change delivery system on cache to %d\n", c->delivery_system);
1630
1631         return 0;
1632 }
1633
1634 static int dtv_property_process_set(struct dvb_frontend *fe,
1635                                     struct dtv_property *tvp,
1636                                     struct file *file)
1637 {
1638         int r = 0;
1639         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1640
1641         /* Allow the frontend to validate incoming properties */
1642         if (fe->ops.set_property) {
1643                 r = fe->ops.set_property(fe, tvp);
1644                 if (r < 0)
1645                         return r;
1646         }
1647
1648         switch(tvp->cmd) {
1649         case DTV_CLEAR:
1650                 /*
1651                  * Reset a cache of data specific to the frontend here. This does
1652                  * not effect hardware.
1653                  */
1654                 dvb_frontend_clear_cache(fe);
1655                 break;
1656         case DTV_TUNE:
1657                 /* interpret the cache of data, build either a traditional frontend
1658                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1659                  * ioctl.
1660                  */
1661                 c->state = tvp->cmd;
1662                 dprintk("%s() Finalised property cache\n", __func__);
1663
1664                 r = dtv_set_frontend(fe);
1665                 break;
1666         case DTV_FREQUENCY:
1667                 c->frequency = tvp->u.data;
1668                 break;
1669         case DTV_MODULATION:
1670                 c->modulation = tvp->u.data;
1671                 break;
1672         case DTV_BANDWIDTH_HZ:
1673                 c->bandwidth_hz = tvp->u.data;
1674                 break;
1675         case DTV_INVERSION:
1676                 c->inversion = tvp->u.data;
1677                 break;
1678         case DTV_SYMBOL_RATE:
1679                 c->symbol_rate = tvp->u.data;
1680                 break;
1681         case DTV_INNER_FEC:
1682                 c->fec_inner = tvp->u.data;
1683                 break;
1684         case DTV_PILOT:
1685                 c->pilot = tvp->u.data;
1686                 break;
1687         case DTV_ROLLOFF:
1688                 c->rolloff = tvp->u.data;
1689                 break;
1690         case DTV_DELIVERY_SYSTEM:
1691                 r = set_delivery_system(fe, tvp->u.data);
1692                 break;
1693         case DTV_VOLTAGE:
1694                 c->voltage = tvp->u.data;
1695                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1696                         (void *)c->voltage);
1697                 break;
1698         case DTV_TONE:
1699                 c->sectone = tvp->u.data;
1700                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1701                         (void *)c->sectone);
1702                 break;
1703         case DTV_CODE_RATE_HP:
1704                 c->code_rate_HP = tvp->u.data;
1705                 break;
1706         case DTV_CODE_RATE_LP:
1707                 c->code_rate_LP = tvp->u.data;
1708                 break;
1709         case DTV_GUARD_INTERVAL:
1710                 c->guard_interval = tvp->u.data;
1711                 break;
1712         case DTV_TRANSMISSION_MODE:
1713                 c->transmission_mode = tvp->u.data;
1714                 break;
1715         case DTV_HIERARCHY:
1716                 c->hierarchy = tvp->u.data;
1717                 break;
1718
1719         /* ISDB-T Support here */
1720         case DTV_ISDBT_PARTIAL_RECEPTION:
1721                 c->isdbt_partial_reception = tvp->u.data;
1722                 break;
1723         case DTV_ISDBT_SOUND_BROADCASTING:
1724                 c->isdbt_sb_mode = tvp->u.data;
1725                 break;
1726         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1727                 c->isdbt_sb_subchannel = tvp->u.data;
1728                 break;
1729         case DTV_ISDBT_SB_SEGMENT_IDX:
1730                 c->isdbt_sb_segment_idx = tvp->u.data;
1731                 break;
1732         case DTV_ISDBT_SB_SEGMENT_COUNT:
1733                 c->isdbt_sb_segment_count = tvp->u.data;
1734                 break;
1735         case DTV_ISDBT_LAYER_ENABLED:
1736                 c->isdbt_layer_enabled = tvp->u.data;
1737                 break;
1738         case DTV_ISDBT_LAYERA_FEC:
1739                 c->layer[0].fec = tvp->u.data;
1740                 break;
1741         case DTV_ISDBT_LAYERA_MODULATION:
1742                 c->layer[0].modulation = tvp->u.data;
1743                 break;
1744         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1745                 c->layer[0].segment_count = tvp->u.data;
1746                 break;
1747         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1748                 c->layer[0].interleaving = tvp->u.data;
1749                 break;
1750         case DTV_ISDBT_LAYERB_FEC:
1751                 c->layer[1].fec = tvp->u.data;
1752                 break;
1753         case DTV_ISDBT_LAYERB_MODULATION:
1754                 c->layer[1].modulation = tvp->u.data;
1755                 break;
1756         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1757                 c->layer[1].segment_count = tvp->u.data;
1758                 break;
1759         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1760                 c->layer[1].interleaving = tvp->u.data;
1761                 break;
1762         case DTV_ISDBT_LAYERC_FEC:
1763                 c->layer[2].fec = tvp->u.data;
1764                 break;
1765         case DTV_ISDBT_LAYERC_MODULATION:
1766                 c->layer[2].modulation = tvp->u.data;
1767                 break;
1768         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1769                 c->layer[2].segment_count = tvp->u.data;
1770                 break;
1771         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1772                 c->layer[2].interleaving = tvp->u.data;
1773                 break;
1774         case DTV_ISDBS_TS_ID:
1775                 c->isdbs_ts_id = tvp->u.data;
1776                 break;
1777         case DTV_DVBT2_PLP_ID:
1778                 c->dvbt2_plp_id = tvp->u.data;
1779                 break;
1780
1781         /* ATSC-MH */
1782         case DTV_ATSCMH_PARADE_ID:
1783                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1784                 break;
1785         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1786                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1787                 break;
1788
1789         default:
1790                 return -EINVAL;
1791         }
1792
1793         return r;
1794 }
1795
1796 static int dvb_frontend_ioctl(struct file *file,
1797                         unsigned int cmd, void *parg)
1798 {
1799         struct dvb_device *dvbdev = file->private_data;
1800         struct dvb_frontend *fe = dvbdev->priv;
1801         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1802         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1803         int err = -EOPNOTSUPP;
1804
1805         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1806
1807         if (fepriv->exit != DVB_FE_NO_EXIT)
1808                 return -ENODEV;
1809
1810         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1811             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1812              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1813                 return -EPERM;
1814
1815         if (down_interruptible (&fepriv->sem))
1816                 return -ERESTARTSYS;
1817
1818         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1819                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1820         else {
1821                 c->state = DTV_UNDEFINED;
1822                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1823         }
1824
1825         up(&fepriv->sem);
1826         return err;
1827 }
1828
1829 static int dvb_frontend_ioctl_properties(struct file *file,
1830                         unsigned int cmd, void *parg)
1831 {
1832         struct dvb_device *dvbdev = file->private_data;
1833         struct dvb_frontend *fe = dvbdev->priv;
1834         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1835         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1836         int err = 0;
1837
1838         struct dtv_properties *tvps = NULL;
1839         struct dtv_property *tvp = NULL;
1840         int i;
1841
1842         dprintk("%s\n", __func__);
1843
1844         if(cmd == FE_SET_PROPERTY) {
1845                 tvps = (struct dtv_properties __user *)parg;
1846
1847                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1848                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1849
1850                 /* Put an arbitrary limit on the number of messages that can
1851                  * be sent at once */
1852                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1853                         return -EINVAL;
1854
1855                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1856                 if (!tvp) {
1857                         err = -ENOMEM;
1858                         goto out;
1859                 }
1860
1861                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1862                         err = -EFAULT;
1863                         goto out;
1864                 }
1865
1866                 for (i = 0; i < tvps->num; i++) {
1867                         err = dtv_property_process_set(fe, tvp + i, file);
1868                         if (err < 0)
1869                                 goto out;
1870                         (tvp + i)->result = err;
1871                 }
1872
1873                 if (c->state == DTV_TUNE)
1874                         dprintk("%s() Property cache is full, tuning\n", __func__);
1875
1876         } else
1877         if(cmd == FE_GET_PROPERTY) {
1878                 tvps = (struct dtv_properties __user *)parg;
1879
1880                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1881                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1882
1883                 /* Put an arbitrary limit on the number of messages that can
1884                  * be sent at once */
1885                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1886                         return -EINVAL;
1887
1888                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1889                 if (!tvp) {
1890                         err = -ENOMEM;
1891                         goto out;
1892                 }
1893
1894                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1895                         err = -EFAULT;
1896                         goto out;
1897                 }
1898
1899                 /*
1900                  * Fills the cache out struct with the cache contents, plus
1901                  * the data retrieved from get_frontend, if the frontend
1902                  * is not idle. Otherwise, returns the cached content
1903                  */
1904                 if (fepriv->state != FESTATE_IDLE) {
1905                         err = dtv_get_frontend(fe, NULL);
1906                         if (err < 0)
1907                                 goto out;
1908                 }
1909                 for (i = 0; i < tvps->num; i++) {
1910                         err = dtv_property_process_get(fe, c, tvp + i, file);
1911                         if (err < 0)
1912                                 goto out;
1913                         (tvp + i)->result = err;
1914                 }
1915
1916                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1917                         err = -EFAULT;
1918                         goto out;
1919                 }
1920
1921         } else
1922                 err = -EOPNOTSUPP;
1923
1924 out:
1925         kfree(tvp);
1926         return err;
1927 }
1928
1929 static int dtv_set_frontend(struct dvb_frontend *fe)
1930 {
1931         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1932         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1933         struct dvb_frontend_tune_settings fetunesettings;
1934         u32 rolloff = 0;
1935
1936         if (dvb_frontend_check_parameters(fe) < 0)
1937                 return -EINVAL;
1938
1939         /*
1940          * Initialize output parameters to match the values given by
1941          * the user. FE_SET_FRONTEND triggers an initial frontend event
1942          * with status = 0, which copies output parameters to userspace.
1943          */
1944         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
1945
1946         /*
1947          * Be sure that the bandwidth will be filled for all
1948          * non-satellite systems, as tuners need to know what
1949          * low pass/Nyquist half filter should be applied, in
1950          * order to avoid inter-channel noise.
1951          *
1952          * ISDB-T and DVB-T/T2 already sets bandwidth.
1953          * ATSC and DVB-C don't set, so, the core should fill it.
1954          *
1955          * On DVB-C Annex A and C, the bandwidth is a function of
1956          * the roll-off and symbol rate. Annex B defines different
1957          * roll-off factors depending on the modulation. Fortunately,
1958          * Annex B is only used with 6MHz, so there's no need to
1959          * calculate it.
1960          *
1961          * While not officially supported, a side effect of handling it at
1962          * the cache level is that a program could retrieve the bandwidth
1963          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1964          */
1965         switch (c->delivery_system) {
1966         case SYS_ATSC:
1967         case SYS_DVBC_ANNEX_B:
1968                 c->bandwidth_hz = 6000000;
1969                 break;
1970         case SYS_DVBC_ANNEX_A:
1971                 rolloff = 115;
1972                 break;
1973         case SYS_DVBC_ANNEX_C:
1974                 rolloff = 113;
1975                 break;
1976         default:
1977                 break;
1978         }
1979         if (rolloff)
1980                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
1981
1982         /* force auto frequency inversion if requested */
1983         if (dvb_force_auto_inversion)
1984                 c->inversion = INVERSION_AUTO;
1985
1986         /*
1987          * without hierarchical coding code_rate_LP is irrelevant,
1988          * so we tolerate the otherwise invalid FEC_NONE setting
1989          */
1990         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
1991                 c->code_rate_LP = FEC_AUTO;
1992
1993         /* get frontend-specific tuning settings */
1994         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1995         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1996                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1997                 fepriv->max_drift = fetunesettings.max_drift;
1998                 fepriv->step_size = fetunesettings.step_size;
1999         } else {
2000                 /* default values */
2001                 switch (c->delivery_system) {
2002                 case SYS_DVBS:
2003                 case SYS_DVBS2:
2004                 case SYS_ISDBS:
2005                 case SYS_TURBO:
2006                 case SYS_DVBC_ANNEX_A:
2007                 case SYS_DVBC_ANNEX_C:
2008                         fepriv->min_delay = HZ / 20;
2009                         fepriv->step_size = c->symbol_rate / 16000;
2010                         fepriv->max_drift = c->symbol_rate / 2000;
2011                         break;
2012                 case SYS_DVBT:
2013                 case SYS_DVBT2:
2014                 case SYS_ISDBT:
2015                 case SYS_DMBTH:
2016                         fepriv->min_delay = HZ / 20;
2017                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2018                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2019                         break;
2020                 default:
2021                         /*
2022                          * FIXME: This sounds wrong! if freqency_stepsize is
2023                          * defined by the frontend, why not use it???
2024                          */
2025                         fepriv->min_delay = HZ / 20;
2026                         fepriv->step_size = 0; /* no zigzag */
2027                         fepriv->max_drift = 0;
2028                         break;
2029                 }
2030         }
2031         if (dvb_override_tune_delay > 0)
2032                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2033
2034         fepriv->state = FESTATE_RETUNE;
2035
2036         /* Request the search algorithm to search */
2037         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2038
2039         dvb_frontend_clear_events(fe);
2040         dvb_frontend_add_event(fe, 0);
2041         dvb_frontend_wakeup(fe);
2042         fepriv->status = 0;
2043
2044         return 0;
2045 }
2046
2047
2048 static int dvb_frontend_ioctl_legacy(struct file *file,
2049                         unsigned int cmd, void *parg)
2050 {
2051         struct dvb_device *dvbdev = file->private_data;
2052         struct dvb_frontend *fe = dvbdev->priv;
2053         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2054         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2055         int cb_err, err = -EOPNOTSUPP;
2056
2057         if (fe->dvb->fe_ioctl_override) {
2058                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
2059                                                     DVB_FE_IOCTL_PRE);
2060                 if (cb_err < 0)
2061                         return cb_err;
2062                 if (cb_err > 0)
2063                         return 0;
2064                 /* fe_ioctl_override returning 0 allows
2065                  * dvb-core to continue handling the ioctl */
2066         }
2067
2068         switch (cmd) {
2069         case FE_GET_INFO: {
2070                 struct dvb_frontend_info* info = parg;
2071
2072                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2073                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2074
2075                 /*
2076                  * Associate the 4 delivery systems supported by DVBv3
2077                  * API with their DVBv5 counterpart. For the other standards,
2078                  * use the closest type, assuming that it would hopefully
2079                  * work with a DVBv3 application.
2080                  * It should be noticed that, on multi-frontend devices with
2081                  * different types (terrestrial and cable, for example),
2082                  * a pure DVBv3 application won't be able to use all delivery
2083                  * systems. Yet, changing the DVBv5 cache to the other delivery
2084                  * system should be enough for making it work.
2085                  */
2086                 switch (dvbv3_type(c->delivery_system)) {
2087                 case DVBV3_QPSK:
2088                         info->type = FE_QPSK;
2089                         break;
2090                 case DVBV3_ATSC:
2091                         info->type = FE_ATSC;
2092                         break;
2093                 case DVBV3_QAM:
2094                         info->type = FE_QAM;
2095                         break;
2096                 case DVBV3_OFDM:
2097                         info->type = FE_OFDM;
2098                         break;
2099                 default:
2100                         printk(KERN_ERR
2101                                "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2102                                __func__, c->delivery_system);
2103                         fe->ops.info.type = FE_OFDM;
2104                 }
2105                 dprintk("current delivery system on cache: %d, V3 type: %d\n",
2106                         c->delivery_system, fe->ops.info.type);
2107
2108                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2109                  * do it, it is done for it. */
2110                 info->caps |= FE_CAN_INVERSION_AUTO;
2111                 err = 0;
2112                 break;
2113         }
2114
2115         case FE_READ_STATUS: {
2116                 fe_status_t* status = parg;
2117
2118                 /* if retune was requested but hasn't occurred yet, prevent
2119                  * that user get signal state from previous tuning */
2120                 if (fepriv->state == FESTATE_RETUNE ||
2121                     fepriv->state == FESTATE_ERROR) {
2122                         err=0;
2123                         *status = 0;
2124                         break;
2125                 }
2126
2127                 if (fe->ops.read_status)
2128                         err = fe->ops.read_status(fe, status);
2129                 break;
2130         }
2131         case FE_READ_BER:
2132                 if (fe->ops.read_ber)
2133                         err = fe->ops.read_ber(fe, (__u32*) parg);
2134                 break;
2135
2136         case FE_READ_SIGNAL_STRENGTH:
2137                 if (fe->ops.read_signal_strength)
2138                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
2139                 break;
2140
2141         case FE_READ_SNR:
2142                 if (fe->ops.read_snr)
2143                         err = fe->ops.read_snr(fe, (__u16*) parg);
2144                 break;
2145
2146         case FE_READ_UNCORRECTED_BLOCKS:
2147                 if (fe->ops.read_ucblocks)
2148                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
2149                 break;
2150
2151
2152         case FE_DISEQC_RESET_OVERLOAD:
2153                 if (fe->ops.diseqc_reset_overload) {
2154                         err = fe->ops.diseqc_reset_overload(fe);
2155                         fepriv->state = FESTATE_DISEQC;
2156                         fepriv->status = 0;
2157                 }
2158                 break;
2159
2160         case FE_DISEQC_SEND_MASTER_CMD:
2161                 if (fe->ops.diseqc_send_master_cmd) {
2162                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2163                         fepriv->state = FESTATE_DISEQC;
2164                         fepriv->status = 0;
2165                 }
2166                 break;
2167
2168         case FE_DISEQC_SEND_BURST:
2169                 if (fe->ops.diseqc_send_burst) {
2170                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2171                         fepriv->state = FESTATE_DISEQC;
2172                         fepriv->status = 0;
2173                 }
2174                 break;
2175
2176         case FE_SET_TONE:
2177                 if (fe->ops.set_tone) {
2178                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2179                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2180                         fepriv->state = FESTATE_DISEQC;
2181                         fepriv->status = 0;
2182                 }
2183                 break;
2184
2185         case FE_SET_VOLTAGE:
2186                 if (fe->ops.set_voltage) {
2187                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2188                         fepriv->voltage = (fe_sec_voltage_t) parg;
2189                         fepriv->state = FESTATE_DISEQC;
2190                         fepriv->status = 0;
2191                 }
2192                 break;
2193
2194         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2195                 if (fe->ops.dishnetwork_send_legacy_command) {
2196                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2197                         fepriv->state = FESTATE_DISEQC;
2198                         fepriv->status = 0;
2199                 } else if (fe->ops.set_voltage) {
2200                         /*
2201                          * NOTE: This is a fallback condition.  Some frontends
2202                          * (stv0299 for instance) take longer than 8msec to
2203                          * respond to a set_voltage command.  Those switches
2204                          * need custom routines to switch properly.  For all
2205                          * other frontends, the following should work ok.
2206                          * Dish network legacy switches (as used by Dish500)
2207                          * are controlled by sending 9-bit command words
2208                          * spaced 8msec apart.
2209                          * the actual command word is switch/port dependent
2210                          * so it is up to the userspace application to send
2211                          * the right command.
2212                          * The command must always start with a '0' after
2213                          * initialization, so parg is 8 bits and does not
2214                          * include the initialization or start bit
2215                          */
2216                         unsigned long swcmd = ((unsigned long) parg) << 1;
2217                         struct timeval nexttime;
2218                         struct timeval tv[10];
2219                         int i;
2220                         u8 last = 1;
2221                         if (dvb_frontend_debug)
2222                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2223                         do_gettimeofday(&nexttime);
2224                         if (dvb_frontend_debug)
2225                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
2226                         /* before sending a command, initialize by sending
2227                          * a 32ms 18V to the switch
2228                          */
2229                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2230                         dvb_frontend_sleep_until(&nexttime, 32000);
2231
2232                         for (i = 0; i < 9; i++) {
2233                                 if (dvb_frontend_debug)
2234                                         do_gettimeofday(&tv[i + 1]);
2235                                 if ((swcmd & 0x01) != last) {
2236                                         /* set voltage to (last ? 13V : 18V) */
2237                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2238                                         last = (last) ? 0 : 1;
2239                                 }
2240                                 swcmd = swcmd >> 1;
2241                                 if (i != 8)
2242                                         dvb_frontend_sleep_until(&nexttime, 8000);
2243                         }
2244                         if (dvb_frontend_debug) {
2245                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2246                                         __func__, fe->dvb->num);
2247                                 for (i = 1; i < 10; i++)
2248                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2249                         }
2250                         err = 0;
2251                         fepriv->state = FESTATE_DISEQC;
2252                         fepriv->status = 0;
2253                 }
2254                 break;
2255
2256         case FE_DISEQC_RECV_SLAVE_REPLY:
2257                 if (fe->ops.diseqc_recv_slave_reply)
2258                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2259                 break;
2260
2261         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2262                 if (fe->ops.enable_high_lnb_voltage)
2263                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2264                 break;
2265
2266         case FE_SET_FRONTEND:
2267                 err = set_delivery_system(fe, SYS_UNDEFINED);
2268                 if (err)
2269                         break;
2270
2271                 err = dtv_property_cache_sync(fe, c, parg);
2272                 if (err)
2273                         break;
2274                 err = dtv_set_frontend(fe);
2275                 break;
2276         case FE_GET_EVENT:
2277                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2278                 break;
2279
2280         case FE_GET_FRONTEND:
2281                 err = dtv_get_frontend(fe, parg);
2282                 break;
2283
2284         case FE_SET_FRONTEND_TUNE_MODE:
2285                 fepriv->tune_mode_flags = (unsigned long) parg;
2286                 err = 0;
2287                 break;
2288         };
2289
2290         if (fe->dvb->fe_ioctl_override) {
2291                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
2292                                                     DVB_FE_IOCTL_POST);
2293                 if (cb_err < 0)
2294                         return cb_err;
2295         }
2296
2297         return err;
2298 }
2299
2300
2301 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2302 {
2303         struct dvb_device *dvbdev = file->private_data;
2304         struct dvb_frontend *fe = dvbdev->priv;
2305         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2306
2307         dprintk ("%s\n", __func__);
2308
2309         poll_wait (file, &fepriv->events.wait_queue, wait);
2310
2311         if (fepriv->events.eventw != fepriv->events.eventr)
2312                 return (POLLIN | POLLRDNORM | POLLPRI);
2313
2314         return 0;
2315 }
2316
2317 static int dvb_frontend_open(struct inode *inode, struct file *file)
2318 {
2319         struct dvb_device *dvbdev = file->private_data;
2320         struct dvb_frontend *fe = dvbdev->priv;
2321         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2322         struct dvb_adapter *adapter = fe->dvb;
2323         int ret;
2324
2325         dprintk ("%s\n", __func__);
2326         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2327                 return -ENODEV;
2328
2329         if (adapter->mfe_shared) {
2330                 mutex_lock (&adapter->mfe_lock);
2331
2332                 if (adapter->mfe_dvbdev == NULL)
2333                         adapter->mfe_dvbdev = dvbdev;
2334
2335                 else if (adapter->mfe_dvbdev != dvbdev) {
2336                         struct dvb_device
2337                                 *mfedev = adapter->mfe_dvbdev;
2338                         struct dvb_frontend
2339                                 *mfe = mfedev->priv;
2340                         struct dvb_frontend_private
2341                                 *mfepriv = mfe->frontend_priv;
2342                         int mferetry = (dvb_mfe_wait_time << 1);
2343
2344                         mutex_unlock (&adapter->mfe_lock);
2345                         while (mferetry-- && (mfedev->users != -1 ||
2346                                         mfepriv->thread != NULL)) {
2347                                 if(msleep_interruptible(500)) {
2348                                         if(signal_pending(current))
2349                                                 return -EINTR;
2350                                 }
2351                         }
2352
2353                         mutex_lock (&adapter->mfe_lock);
2354                         if(adapter->mfe_dvbdev != dvbdev) {
2355                                 mfedev = adapter->mfe_dvbdev;
2356                                 mfe = mfedev->priv;
2357                                 mfepriv = mfe->frontend_priv;
2358                                 if (mfedev->users != -1 ||
2359                                                 mfepriv->thread != NULL) {
2360                                         mutex_unlock (&adapter->mfe_lock);
2361                                         return -EBUSY;
2362                                 }
2363                                 adapter->mfe_dvbdev = dvbdev;
2364                         }
2365                 }
2366         }
2367
2368         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2369                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2370                         goto err0;
2371
2372                 /* If we took control of the bus, we need to force
2373                    reinitialization.  This is because many ts_bus_ctrl()
2374                    functions strobe the RESET pin on the demod, and if the
2375                    frontend thread already exists then the dvb_init() routine
2376                    won't get called (which is what usually does initial
2377                    register configuration). */
2378                 fepriv->reinitialise = 1;
2379         }
2380
2381         if ((ret = dvb_generic_open (inode, file)) < 0)
2382                 goto err1;
2383
2384         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2385                 /* normal tune mode when opened R/W */
2386                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2387                 fepriv->tone = -1;
2388                 fepriv->voltage = -1;
2389
2390                 ret = dvb_frontend_start (fe);
2391                 if (ret)
2392                         goto err2;
2393
2394                 /*  empty event queue */
2395                 fepriv->events.eventr = fepriv->events.eventw = 0;
2396         }
2397
2398         if (adapter->mfe_shared)
2399                 mutex_unlock (&adapter->mfe_lock);
2400         return ret;
2401
2402 err2:
2403         dvb_generic_release(inode, file);
2404 err1:
2405         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2406                 fe->ops.ts_bus_ctrl(fe, 0);
2407 err0:
2408         if (adapter->mfe_shared)
2409                 mutex_unlock (&adapter->mfe_lock);
2410         return ret;
2411 }
2412
2413 static int dvb_frontend_release(struct inode *inode, struct file *file)
2414 {
2415         struct dvb_device *dvbdev = file->private_data;
2416         struct dvb_frontend *fe = dvbdev->priv;
2417         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2418         int ret;
2419
2420         dprintk ("%s\n", __func__);
2421
2422         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2423                 fepriv->release_jiffies = jiffies;
2424                 mb();
2425         }
2426
2427         ret = dvb_generic_release (inode, file);
2428
2429         if (dvbdev->users == -1) {
2430                 wake_up(&fepriv->wait_queue);
2431                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2432                         fops_put(file->f_op);
2433                         file->f_op = NULL;
2434                         wake_up(&dvbdev->wait_queue);
2435                 }
2436                 if (fe->ops.ts_bus_ctrl)
2437                         fe->ops.ts_bus_ctrl(fe, 0);
2438         }
2439
2440         return ret;
2441 }
2442
2443 static const struct file_operations dvb_frontend_fops = {
2444         .owner          = THIS_MODULE,
2445         .unlocked_ioctl = dvb_generic_ioctl,
2446         .poll           = dvb_frontend_poll,
2447         .open           = dvb_frontend_open,
2448         .release        = dvb_frontend_release,
2449         .llseek         = noop_llseek,
2450 };
2451
2452 int dvb_register_frontend(struct dvb_adapter* dvb,
2453                           struct dvb_frontend* fe)
2454 {
2455         struct dvb_frontend_private *fepriv;
2456         static const struct dvb_device dvbdev_template = {
2457                 .users = ~0,
2458                 .writers = 1,
2459                 .readers = (~0)-1,
2460                 .fops = &dvb_frontend_fops,
2461                 .kernel_ioctl = dvb_frontend_ioctl
2462         };
2463
2464         dprintk ("%s\n", __func__);
2465
2466         if (mutex_lock_interruptible(&frontend_mutex))
2467                 return -ERESTARTSYS;
2468
2469         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2470         if (fe->frontend_priv == NULL) {
2471                 mutex_unlock(&frontend_mutex);
2472                 return -ENOMEM;
2473         }
2474         fepriv = fe->frontend_priv;
2475
2476         sema_init(&fepriv->sem, 1);
2477         init_waitqueue_head (&fepriv->wait_queue);
2478         init_waitqueue_head (&fepriv->events.wait_queue);
2479         mutex_init(&fepriv->events.mtx);
2480         fe->dvb = dvb;
2481         fepriv->inversion = INVERSION_OFF;
2482
2483         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2484                 fe->dvb->num,
2485                 fe->id,
2486                 fe->ops.info.name);
2487
2488         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2489                              fe, DVB_DEVICE_FRONTEND);
2490
2491         /*
2492          * Initialize the cache to the proper values according with the
2493          * first supported delivery system (ops->delsys[0])
2494          */
2495
2496         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2497         dvb_frontend_clear_cache(fe);
2498
2499         mutex_unlock(&frontend_mutex);
2500         return 0;
2501 }
2502 EXPORT_SYMBOL(dvb_register_frontend);
2503
2504 int dvb_unregister_frontend(struct dvb_frontend* fe)
2505 {
2506         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2507         dprintk ("%s\n", __func__);
2508
2509         mutex_lock(&frontend_mutex);
2510         dvb_frontend_stop (fe);
2511         mutex_unlock(&frontend_mutex);
2512
2513         if (fepriv->dvbdev->users < -1)
2514                 wait_event(fepriv->dvbdev->wait_queue,
2515                                 fepriv->dvbdev->users==-1);
2516
2517         mutex_lock(&frontend_mutex);
2518         dvb_unregister_device (fepriv->dvbdev);
2519
2520         /* fe is invalid now */
2521         kfree(fepriv);
2522         mutex_unlock(&frontend_mutex);
2523         return 0;
2524 }
2525 EXPORT_SYMBOL(dvb_unregister_frontend);
2526
2527 #ifdef CONFIG_MEDIA_ATTACH
2528 void dvb_frontend_detach(struct dvb_frontend* fe)
2529 {
2530         void *ptr;
2531
2532         if (fe->ops.release_sec) {
2533                 fe->ops.release_sec(fe);
2534                 symbol_put_addr(fe->ops.release_sec);
2535         }
2536         if (fe->ops.tuner_ops.release) {
2537                 fe->ops.tuner_ops.release(fe);
2538                 symbol_put_addr(fe->ops.tuner_ops.release);
2539         }
2540         if (fe->ops.analog_ops.release) {
2541                 fe->ops.analog_ops.release(fe);
2542                 symbol_put_addr(fe->ops.analog_ops.release);
2543         }
2544         ptr = (void*)fe->ops.release;
2545         if (ptr) {
2546                 fe->ops.release(fe);
2547                 symbol_put_addr(ptr);
2548         }
2549 }
2550 #else
2551 void dvb_frontend_detach(struct dvb_frontend* fe)
2552 {
2553         if (fe->ops.release_sec)
2554                 fe->ops.release_sec(fe);
2555         if (fe->ops.tuner_ops.release)
2556                 fe->ops.tuner_ops.release(fe);
2557         if (fe->ops.analog_ops.release)
2558                 fe->ops.analog_ops.release(fe);
2559         if (fe->ops.release)
2560                 fe->ops.release(fe);
2561 }
2562 #endif
2563 EXPORT_SYMBOL(dvb_frontend_detach);