drivers/media/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 FESTATE_IDLE 1
  70 #define FESTATE_RETUNE 2
  71 #define FESTATE_TUNING_FAST 4
  72 #define FESTATE_TUNING_SLOW 8
  73 #define FESTATE_TUNED 16
  74 #define FESTATE_ZIGZAG_FAST 32
  75 #define FESTATE_ZIGZAG_SLOW 64
  76 #define FESTATE_DISEQC 128
  77 #define FESTATE_ERROR 256
  78 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  79 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  80 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  81 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  82
  83 #define FE_ALGO_HW              1
  84 /*
  85  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  86  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  87  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  88  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  89  * FESTATE_TUNED. The frontend has successfully locked on.
  90  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  91  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  92  * FESTATE_DISEQC. A DISEQC command has just been issued.
  93  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  94  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  95  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  96  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  97  */
  98
  99 #define DVB_FE_NO_EXIT  0
 100 #define DVB_FE_NORMAL_EXIT      1
 101 #define DVB_FE_DEVICE_REMOVED   2
 102
 103 static DEFINE_MUTEX(frontend_mutex);
 104
 105 struct dvb_frontend_private {
 106
 107         /* thread/frontend values */
 108         struct dvb_device *dvbdev;
 109         struct dvb_frontend_parameters parameters_out;
 110         struct dvb_fe_events events;
 111         struct semaphore sem;
 112         struct list_head list_head;
 113         wait_queue_head_t wait_queue;
 114         struct task_struct *thread;
 115         unsigned long release_jiffies;
 116         unsigned int exit;
 117         unsigned int wakeup;
 118         fe_status_t status;
 119         unsigned long tune_mode_flags;
 120         unsigned int delay;
 121         unsigned int reinitialise;
 122         int tone;
 123         int voltage;
 124
 125         /* swzigzag values */
 126         unsigned int state;
 127         unsigned int bending;
 128         int lnb_drift;
 129         unsigned int inversion;
 130         unsigned int auto_step;
 131         unsigned int auto_sub_step;
 132         unsigned int started_auto_step;
 133         unsigned int min_delay;
 134         unsigned int max_drift;
 135         unsigned int step_size;
 136         int quality;
 137         unsigned int check_wrapped;
 138         enum dvbfe_search algo_status;
 139 };
 140
 141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 142 static int dtv_get_frontend(struct dvb_frontend *fe,
 143                             struct dvb_frontend_parameters *p_out);
 144 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 145                                            struct dvb_frontend_parameters *p);
 146
 147 static bool has_get_frontend(struct dvb_frontend *fe)
 148 {
 149         return fe->ops.get_frontend != NULL;
 150 }
 151
 152 /*
 153  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 154  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 155  * otherwise, a DVBv3 call will fail.
 156  */
 157 enum dvbv3_emulation_type {
 158         DVBV3_UNKNOWN,
 159         DVBV3_QPSK,
 160         DVBV3_QAM,
 161         DVBV3_OFDM,
 162         DVBV3_ATSC,
 163 };
 164
 165 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 166 {
 167         switch (delivery_system) {
 168         case SYS_DVBC_ANNEX_A:
 169         case SYS_DVBC_ANNEX_C:
 170                 return DVBV3_QAM;
 171         case SYS_DVBS:
 172         case SYS_DVBS2:
 173         case SYS_TURBO:
 174         case SYS_ISDBS:
 175         case SYS_DSS:
 176                 return DVBV3_QPSK;
 177         case SYS_DVBT:
 178         case SYS_DVBT2:
 179         case SYS_ISDBT:
 180         case SYS_DTMB:
 181                 return DVBV3_OFDM;
 182         case SYS_ATSC:
 183         case SYS_ATSCMH:
 184         case SYS_DVBC_ANNEX_B:
 185                 return DVBV3_ATSC;
 186         case SYS_UNDEFINED:
 187         case SYS_ISDBC:
 188         case SYS_DVBH:
 189         case SYS_DAB:
 190         default:
 191                 /*
 192                  * Doesn't know how to emulate those types and/or
 193                  * there's no frontend driver from this type yet
 194                  * with some emulation code, so, we're not sure yet how
 195                  * to handle them, or they're not compatible with a DVBv3 call.
 196                  */
 197                 return DVBV3_UNKNOWN;
 198         }
 199 }
 200
 201 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 202 {
 203         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 204         struct dvb_fe_events *events = &fepriv->events;
 205         struct dvb_frontend_event *e;
 206         int wp;
 207
 208         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 209
 210         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 211                 dtv_get_frontend(fe, &fepriv->parameters_out);
 212
 213         mutex_lock(&events->mtx);
 214
 215         wp = (events->eventw + 1) % MAX_EVENT;
 216         if (wp == events->eventr) {
 217                 events->overflow = 1;
 218                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 219         }
 220
 221         e = &events->events[events->eventw];
 222         e->status = status;
 223         e->parameters = fepriv->parameters_out;
 224
 225         events->eventw = wp;
 226
 227         mutex_unlock(&events->mtx);
 228
 229         wake_up_interruptible (&events->wait_queue);
 230 }
 231
 232 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 233                             struct dvb_frontend_event *event, int flags)
 234 {
 235         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 236         struct dvb_fe_events *events = &fepriv->events;
 237
 238         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 239
 240         if (events->overflow) {
 241                 events->overflow = 0;
 242                 return -EOVERFLOW;
 243         }
 244
 245         if (events->eventw == events->eventr) {
 246                 int ret;
 247
 248                 if (flags & O_NONBLOCK)
 249                         return -EWOULDBLOCK;
 250
 251                 up(&fepriv->sem);
 252
 253                 ret = wait_event_interruptible (events->wait_queue,
 254                                                 events->eventw != events->eventr);
 255
 256                 if (down_interruptible (&fepriv->sem))
 257                         return -ERESTARTSYS;
 258
 259                 if (ret < 0)
 260                         return ret;
 261         }
 262
 263         mutex_lock(&events->mtx);
 264         *event = events->events[events->eventr];
 265         events->eventr = (events->eventr + 1) % MAX_EVENT;
 266         mutex_unlock(&events->mtx);
 267
 268         return 0;
 269 }
 270
 271 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 272 {
 273         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 274         struct dvb_fe_events *events = &fepriv->events;
 275
 276         mutex_lock(&events->mtx);
 277         events->eventr = events->eventw;
 278         mutex_unlock(&events->mtx);
 279 }
 280
 281 static void dvb_frontend_init(struct dvb_frontend *fe)
 282 {
 283         dev_dbg(fe->dvb->device,
 284                         "%s: initialising adapter %i frontend %i (%s)...\n",
 285                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 286
 287         if (fe->ops.init)
 288                 fe->ops.init(fe);
 289         if (fe->ops.tuner_ops.init) {
 290                 if (fe->ops.i2c_gate_ctrl)
 291                         fe->ops.i2c_gate_ctrl(fe, 1);
 292                 fe->ops.tuner_ops.init(fe);
 293                 if (fe->ops.i2c_gate_ctrl)
 294                         fe->ops.i2c_gate_ctrl(fe, 0);
 295         }
 296 }
 297
 298 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 299 {
 300         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 301
 302         fepriv->reinitialise = 1;
 303         dvb_frontend_wakeup(fe);
 304 }
 305 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 306
 307 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 308 {
 309         int q2;
 310         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 311
 312         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 313
 314         if (locked)
 315                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 316         else
 317                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 318
 319         q2 = fepriv->quality - 128;
 320         q2 *= q2;
 321
 322         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 323 }
 324
 325 /**
 326  * Performs automatic twiddling of frontend parameters.
 327  *
 328  * @param fe The frontend concerned.
 329  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 330  * @returns Number of complete iterations that have been performed.
 331  */
 332 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 333 {
 334         int autoinversion;
 335         int ready = 0;
 336         int fe_set_err = 0;
 337         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 338         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 339         int original_inversion = c->inversion;
 340         u32 original_frequency = c->frequency;
 341
 342         /* are we using autoinversion? */
 343         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 344                          (c->inversion == INVERSION_AUTO));
 345
 346         /* setup parameters correctly */
 347         while(!ready) {
 348                 /* calculate the lnb_drift */
 349                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 350
 351                 /* wrap the auto_step if we've exceeded the maximum drift */
 352                 if (fepriv->lnb_drift > fepriv->max_drift) {
 353                         fepriv->auto_step = 0;
 354                         fepriv->auto_sub_step = 0;
 355                         fepriv->lnb_drift = 0;
 356                 }
 357
 358                 /* perform inversion and +/- zigzag */
 359                 switch(fepriv->auto_sub_step) {
 360                 case 0:
 361                         /* try with the current inversion and current drift setting */
 362                         ready = 1;
 363                         break;
 364
 365                 case 1:
 366                         if (!autoinversion) break;
 367
 368                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 369                         ready = 1;
 370                         break;
 371
 372                 case 2:
 373                         if (fepriv->lnb_drift == 0) break;
 374
 375                         fepriv->lnb_drift = -fepriv->lnb_drift;
 376                         ready = 1;
 377                         break;
 378
 379                 case 3:
 380                         if (fepriv->lnb_drift == 0) break;
 381                         if (!autoinversion) break;
 382
 383                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 384                         fepriv->lnb_drift = -fepriv->lnb_drift;
 385                         ready = 1;
 386                         break;
 387
 388                 default:
 389                         fepriv->auto_step++;
 390                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 391                         break;
 392                 }
 393
 394                 if (!ready) fepriv->auto_sub_step++;
 395         }
 396
 397         /* if this attempt would hit where we started, indicate a complete
 398          * iteration has occurred */
 399         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 400             (fepriv->auto_sub_step == 0) && check_wrapped) {
 401                 return 1;
 402         }
 403
 404         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 405                         "auto_sub_step:%i started_auto_step:%i\n",
 406                         __func__, fepriv->lnb_drift, fepriv->inversion,
 407                         fepriv->auto_step, fepriv->auto_sub_step,
 408                         fepriv->started_auto_step);
 409
 410         /* set the frontend itself */
 411         c->frequency += fepriv->lnb_drift;
 412         if (autoinversion)
 413                 c->inversion = fepriv->inversion;
 414         tmp = *c;
 415         if (fe->ops.set_frontend)
 416                 fe_set_err = fe->ops.set_frontend(fe);
 417         *c = tmp;
 418         if (fe_set_err < 0) {
 419                 fepriv->state = FESTATE_ERROR;
 420                 return fe_set_err;
 421         }
 422
 423         c->frequency = original_frequency;
 424         c->inversion = original_inversion;
 425
 426         fepriv->auto_sub_step++;
 427         return 0;
 428 }
 429
 430 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 431 {
 432         fe_status_t s = 0;
 433         int retval = 0;
 434         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 435         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 436
 437         /* if we've got no parameters, just keep idling */
 438         if (fepriv->state & FESTATE_IDLE) {
 439                 fepriv->delay = 3*HZ;
 440                 fepriv->quality = 0;
 441                 return;
 442         }
 443
 444         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 445         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 446                 if (fepriv->state & FESTATE_RETUNE) {
 447                         tmp = *c;
 448                         if (fe->ops.set_frontend)
 449                                 retval = fe->ops.set_frontend(fe);
 450                         *c = tmp;
 451                         if (retval < 0)
 452                                 fepriv->state = FESTATE_ERROR;
 453                         else
 454                                 fepriv->state = FESTATE_TUNED;
 455                 }
 456                 fepriv->delay = 3*HZ;
 457                 fepriv->quality = 0;
 458                 return;
 459         }
 460
 461         /* get the frontend status */
 462         if (fepriv->state & FESTATE_RETUNE) {
 463                 s = 0;
 464         } else {
 465                 if (fe->ops.read_status)
 466                         fe->ops.read_status(fe, &s);
 467                 if (s != fepriv->status) {
 468                         dvb_frontend_add_event(fe, s);
 469                         fepriv->status = s;
 470                 }
 471         }
 472
 473         /* if we're not tuned, and we have a lock, move to the TUNED state */
 474         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 475                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 476                 fepriv->state = FESTATE_TUNED;
 477
 478                 /* if we're tuned, then we have determined the correct inversion */
 479                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 480                     (c->inversion == INVERSION_AUTO)) {
 481                         c->inversion = fepriv->inversion;
 482                 }
 483                 return;
 484         }
 485
 486         /* if we are tuned already, check we're still locked */
 487         if (fepriv->state & FESTATE_TUNED) {
 488                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 489
 490                 /* we're tuned, and the lock is still good... */
 491                 if (s & FE_HAS_LOCK) {
 492                         return;
 493                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 494                         fepriv->state = FESTATE_ZIGZAG_FAST;
 495                         fepriv->started_auto_step = fepriv->auto_step;
 496                         fepriv->check_wrapped = 0;
 497                 }
 498         }
 499
 500         /* don't actually do anything if we're in the LOSTLOCK state,
 501          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 502         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 503             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 504                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 505                 return;
 506         }
 507
 508         /* don't do anything if we're in the DISEQC state, since this
 509          * might be someone with a motorized dish controlled by DISEQC.
 510          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 511         if (fepriv->state & FESTATE_DISEQC) {
 512                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 513                 return;
 514         }
 515
 516         /* if we're in the RETUNE state, set everything up for a brand
 517          * new scan, keeping the current inversion setting, as the next
 518          * tune is _very_ likely to require the same */
 519         if (fepriv->state & FESTATE_RETUNE) {
 520                 fepriv->lnb_drift = 0;
 521                 fepriv->auto_step = 0;
 522                 fepriv->auto_sub_step = 0;
 523                 fepriv->started_auto_step = 0;
 524                 fepriv->check_wrapped = 0;
 525         }
 526
 527         /* fast zigzag. */
 528         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 529                 fepriv->delay = fepriv->min_delay;
 530
 531                 /* perform a tune */
 532                 retval = dvb_frontend_swzigzag_autotune(fe,
 533                                                         fepriv->check_wrapped);
 534                 if (retval < 0) {
 535                         return;
 536                 } else if (retval) {
 537                         /* OK, if we've run out of trials at the fast speed.
 538                          * Drop back to slow for the _next_ attempt */
 539                         fepriv->state = FESTATE_SEARCHING_SLOW;
 540                         fepriv->started_auto_step = fepriv->auto_step;
 541                         return;
 542                 }
 543                 fepriv->check_wrapped = 1;
 544
 545                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 546                  * This ensures we cannot return from an
 547                  * FE_SET_FRONTEND ioctl before the first frontend tune
 548                  * occurs */
 549                 if (fepriv->state & FESTATE_RETUNE) {
 550                         fepriv->state = FESTATE_TUNING_FAST;
 551                 }
 552         }
 553
 554         /* slow zigzag */
 555         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 556                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 557
 558                 /* Note: don't bother checking for wrapping; we stay in this
 559                  * state until we get a lock */
 560                 dvb_frontend_swzigzag_autotune(fe, 0);
 561         }
 562 }
 563
 564 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 565 {
 566         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 567
 568         if (fepriv->exit != DVB_FE_NO_EXIT)
 569                 return 1;
 570
 571         if (fepriv->dvbdev->writers == 1)
 572                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 573                                   dvb_shutdown_timeout * HZ))
 574                         return 1;
 575
 576         return 0;
 577 }
 578
 579 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 580 {
 581         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 582
 583         if (fepriv->wakeup) {
 584                 fepriv->wakeup = 0;
 585                 return 1;
 586         }
 587         return dvb_frontend_is_exiting(fe);
 588 }
 589
 590 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 591 {
 592         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 593
 594         fepriv->wakeup = 1;
 595         wake_up_interruptible(&fepriv->wait_queue);
 596 }
 597
 598 static int dvb_frontend_thread(void *data)
 599 {
 600         struct dvb_frontend *fe = data;
 601         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 602         fe_status_t s;
 603         enum dvbfe_algo algo;
 604
 605         bool re_tune = false;
 606         bool semheld = false;
 607
 608         dev_dbg(fe->dvb->device, "%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                         if (!down_interruptible(&fepriv->sem))
 631                                 semheld = true;
 632                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 633                         break;
 634                 }
 635
 636                 if (try_to_freeze())
 637                         goto restart;
 638
 639                 if (down_interruptible(&fepriv->sem))
 640                         break;
 641
 642                 if (fepriv->reinitialise) {
 643                         dvb_frontend_init(fe);
 644                         if (fe->ops.set_tone && fepriv->tone != -1)
 645                                 fe->ops.set_tone(fe, fepriv->tone);
 646                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 647                                 fe->ops.set_voltage(fe, fepriv->voltage);
 648                         fepriv->reinitialise = 0;
 649                 }
 650
 651                 /* do an iteration of the tuning loop */
 652                 if (fe->ops.get_frontend_algo) {
 653                         algo = fe->ops.get_frontend_algo(fe);
 654                         switch (algo) {
 655                         case DVBFE_ALGO_HW:
 656                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 657
 658                                 if (fepriv->state & FESTATE_RETUNE) {
 659                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 660                                         re_tune = true;
 661                                         fepriv->state = FESTATE_TUNED;
 662                                 } else {
 663                                         re_tune = false;
 664                                 }
 665
 666                                 if (fe->ops.tune)
 667                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 668
 669                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 670                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 671                                         dvb_frontend_add_event(fe, s);
 672                                         fepriv->status = s;
 673                                 }
 674                                 break;
 675                         case DVBFE_ALGO_SW:
 676                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 677                                 dvb_frontend_swzigzag(fe);
 678                                 break;
 679                         case DVBFE_ALGO_CUSTOM:
 680                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 681                                 if (fepriv->state & FESTATE_RETUNE) {
 682                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 683                                         fepriv->state = FESTATE_TUNED;
 684                                 }
 685                                 /* Case where we are going to search for a carrier
 686                                  * User asked us to retune again for some reason, possibly
 687                                  * requesting a search with a new set of parameters
 688                                  */
 689                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 690                                         if (fe->ops.search) {
 691                                                 fepriv->algo_status = fe->ops.search(fe);
 692                                                 /* We did do a search as was requested, the flags are
 693                                                  * now unset as well and has the flags wrt to search.
 694                                                  */
 695                                         } else {
 696                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 697                                         }
 698                                 }
 699                                 /* Track the carrier if the search was successful */
 700                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 701                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 702                                         fepriv->delay = HZ / 2;
 703                                 }
 704                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
 705                                 fe->ops.read_status(fe, &s);
 706                                 if (s != fepriv->status) {
 707                                         dvb_frontend_add_event(fe, s); /* update event list */
 708                                         fepriv->status = s;
 709                                         if (!(s & FE_HAS_LOCK)) {
 710                                                 fepriv->delay = HZ / 10;
 711                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 712                                         } else {
 713                                                 fepriv->delay = 60 * HZ;
 714                                         }
 715                                 }
 716                                 break;
 717                         default:
 718                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 719                                 break;
 720                         }
 721                 } else {
 722                         dvb_frontend_swzigzag(fe);
 723                 }
 724         }
 725
 726         if (dvb_powerdown_on_sleep) {
 727                 if (fe->ops.set_voltage)
 728                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 729                 if (fe->ops.tuner_ops.sleep) {
 730                         if (fe->ops.i2c_gate_ctrl)
 731                                 fe->ops.i2c_gate_ctrl(fe, 1);
 732                         fe->ops.tuner_ops.sleep(fe);
 733                         if (fe->ops.i2c_gate_ctrl)
 734                                 fe->ops.i2c_gate_ctrl(fe, 0);
 735                 }
 736                 if (fe->ops.sleep)
 737                         fe->ops.sleep(fe);
 738         }
 739
 740         fepriv->thread = NULL;
 741         if (kthread_should_stop())
 742                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 743         else
 744                 fepriv->exit = DVB_FE_NO_EXIT;
 745         mb();
 746
 747         if (semheld)
 748                 up(&fepriv->sem);
 749         dvb_frontend_wakeup(fe);
 750         return 0;
 751 }
 752
 753 static void dvb_frontend_stop(struct dvb_frontend *fe)
 754 {
 755         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 756
 757         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 758
 759         fepriv->exit = DVB_FE_NORMAL_EXIT;
 760         mb();
 761
 762         if (!fepriv->thread)
 763                 return;
 764
 765         kthread_stop(fepriv->thread);
 766
 767         sema_init(&fepriv->sem, 1);
 768         fepriv->state = FESTATE_IDLE;
 769
 770         /* paranoia check in case a signal arrived */
 771         if (fepriv->thread)
 772                 dev_warn(fe->dvb->device,
 773                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 774                                 fepriv->thread);
 775 }
 776
 777 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 778 {
 779         return ((curtime.tv_usec < lasttime.tv_usec) ?
 780                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 781                 curtime.tv_usec - lasttime.tv_usec);
 782 }
 783 EXPORT_SYMBOL(timeval_usec_diff);
 784
 785 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 786 {
 787         curtime->tv_usec += add_usec;
 788         if (curtime->tv_usec >= 1000000) {
 789                 curtime->tv_usec -= 1000000;
 790                 curtime->tv_sec++;
 791         }
 792 }
 793
 794 /*
 795  * Sleep until gettimeofday() > waketime + add_usec
 796  * This needs to be as precise as possible, but as the delay is
 797  * usually between 2ms and 32ms, it is done using a scheduled msleep
 798  * followed by usleep (normally a busy-wait loop) for the remainder
 799  */
 800 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 801 {
 802         struct timeval lasttime;
 803         s32 delta, newdelta;
 804
 805         timeval_usec_add(waketime, add_usec);
 806
 807         do_gettimeofday(&lasttime);
 808         delta = timeval_usec_diff(lasttime, *waketime);
 809         if (delta > 2500) {
 810                 msleep((delta - 1500) / 1000);
 811                 do_gettimeofday(&lasttime);
 812                 newdelta = timeval_usec_diff(lasttime, *waketime);
 813                 delta = (newdelta > delta) ? 0 : newdelta;
 814         }
 815         if (delta > 0)
 816                 udelay(delta);
 817 }
 818 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 819
 820 static int dvb_frontend_start(struct dvb_frontend *fe)
 821 {
 822         int ret;
 823         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 824         struct task_struct *fe_thread;
 825
 826         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 827
 828         if (fepriv->thread) {
 829                 if (fepriv->exit == DVB_FE_NO_EXIT)
 830                         return 0;
 831                 else
 832                         dvb_frontend_stop (fe);
 833         }
 834
 835         if (signal_pending(current))
 836                 return -EINTR;
 837         if (down_interruptible (&fepriv->sem))
 838                 return -EINTR;
 839
 840         fepriv->state = FESTATE_IDLE;
 841         fepriv->exit = DVB_FE_NO_EXIT;
 842         fepriv->thread = NULL;
 843         mb();
 844
 845         fe_thread = kthread_run(dvb_frontend_thread, fe,
 846                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 847         if (IS_ERR(fe_thread)) {
 848                 ret = PTR_ERR(fe_thread);
 849                 dev_warn(fe->dvb->device,
 850                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 851                                 ret);
 852                 up(&fepriv->sem);
 853                 return ret;
 854         }
 855         fepriv->thread = fe_thread;
 856         return 0;
 857 }
 858
 859 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 860                                         u32 *freq_min, u32 *freq_max)
 861 {
 862         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 863
 864         if (fe->ops.info.frequency_max == 0)
 865                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 866         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 867                 *freq_max = fe->ops.info.frequency_max;
 868         else
 869                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 870
 871         if (*freq_min == 0 || *freq_max == 0)
 872                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 873                                 fe->dvb->num, fe->id);
 874 }
 875
 876 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 877 {
 878         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 879         u32 freq_min;
 880         u32 freq_max;
 881
 882         /* range check: frequency */
 883         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 884         if ((freq_min && c->frequency < freq_min) ||
 885             (freq_max && c->frequency > freq_max)) {
 886                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 887                                 fe->dvb->num, fe->id, c->frequency,
 888                                 freq_min, freq_max);
 889                 return -EINVAL;
 890         }
 891
 892         /* range check: symbol rate */
 893         switch (c->delivery_system) {
 894         case SYS_DVBS:
 895         case SYS_DVBS2:
 896         case SYS_TURBO:
 897         case SYS_DVBC_ANNEX_A:
 898         case SYS_DVBC_ANNEX_C:
 899                 if ((fe->ops.info.symbol_rate_min &&
 900                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 901                     (fe->ops.info.symbol_rate_max &&
 902                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 903                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 904                                         fe->dvb->num, fe->id, c->symbol_rate,
 905                                         fe->ops.info.symbol_rate_min,
 906                                         fe->ops.info.symbol_rate_max);
 907                         return -EINVAL;
 908                 }
 909         default:
 910                 break;
 911         }
 912
 913         return 0;
 914 }
 915
 916 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 917 {
 918         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 919         int i;
 920         u32 delsys;
 921
 922         delsys = c->delivery_system;
 923         memset(c, 0, sizeof(struct dtv_frontend_properties));
 924         c->delivery_system = delsys;
 925
 926         c->state = DTV_CLEAR;
 927
 928         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
 929                         __func__, c->delivery_system);
 930
 931         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 932         c->bandwidth_hz = 0;    /* AUTO */
 933         c->guard_interval = GUARD_INTERVAL_AUTO;
 934         c->hierarchy = HIERARCHY_AUTO;
 935         c->symbol_rate = 0;
 936         c->code_rate_HP = FEC_AUTO;
 937         c->code_rate_LP = FEC_AUTO;
 938         c->fec_inner = FEC_AUTO;
 939         c->rolloff = ROLLOFF_AUTO;
 940         c->voltage = SEC_VOLTAGE_OFF;
 941         c->sectone = SEC_TONE_OFF;
 942         c->pilot = PILOT_AUTO;
 943
 944         c->isdbt_partial_reception = 0;
 945         c->isdbt_sb_mode = 0;
 946         c->isdbt_sb_subchannel = 0;
 947         c->isdbt_sb_segment_idx = 0;
 948         c->isdbt_sb_segment_count = 0;
 949         c->isdbt_layer_enabled = 0;
 950         for (i = 0; i < 3; i++) {
 951                 c->layer[i].fec = FEC_AUTO;
 952                 c->layer[i].modulation = QAM_AUTO;
 953                 c->layer[i].interleaving = 0;
 954                 c->layer[i].segment_count = 0;
 955         }
 956
 957         c->stream_id = NO_STREAM_ID_FILTER;
 958
 959         switch (c->delivery_system) {
 960         case SYS_DVBS:
 961         case SYS_DVBS2:
 962         case SYS_TURBO:
 963                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 964                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 965                 break;
 966         case SYS_ATSC:
 967                 c->modulation = VSB_8;
 968                 break;
 969         default:
 970                 c->modulation = QAM_AUTO;
 971                 break;
 972         }
 973
 974         c->lna = LNA_AUTO;
 975
 976         return 0;
 977 }
 978
 979 #define _DTV_CMD(n, s, b) \
 980 [n] = { \
 981         .name = #n, \
 982         .cmd  = n, \
 983         .set  = s,\
 984         .buffer = b \
 985 }
 986
 987 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 988         _DTV_CMD(DTV_TUNE, 1, 0),
 989         _DTV_CMD(DTV_CLEAR, 1, 0),
 990
 991         /* Set */
 992         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 993         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 994         _DTV_CMD(DTV_MODULATION, 1, 0),
 995         _DTV_CMD(DTV_INVERSION, 1, 0),
 996         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 997         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 998         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 999         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1000         _DTV_CMD(DTV_TONE, 1, 0),
1001         _DTV_CMD(DTV_PILOT, 1, 0),
1002         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1003         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1004         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1005         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1006         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1007         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1008         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1009         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1010
1011         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1012         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1013         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1014         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1015         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1016         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1017         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1018         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1019         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1020         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1021         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1022         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1023         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1024         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1025         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1026         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1027         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1028         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1029
1030         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1031         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1032         _DTV_CMD(DTV_LNA, 1, 0),
1033
1034         /* Get */
1035         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1036         _DTV_CMD(DTV_API_VERSION, 0, 0),
1037
1038         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1039
1040         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1041         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1042
1043         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1044         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1045         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1046         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1047         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1048         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1049         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1050         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1051         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1052         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1053         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1054         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1055         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1056 };
1057
1058 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1059 {
1060         int i;
1061
1062         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1063                 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1064                                 __func__, tvp->cmd);
1065                 return;
1066         }
1067
1068         dev_dbg(fe->dvb->device, "%s: tvp.cmd    = 0x%08x (%s)\n", __func__,
1069                         tvp->cmd, dtv_cmds[tvp->cmd].name);
1070
1071         if (dtv_cmds[tvp->cmd].buffer) {
1072                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1073                         __func__, tvp->u.buffer.len);
1074
1075                 for(i = 0; i < tvp->u.buffer.len; i++)
1076                         dev_dbg(fe->dvb->device,
1077                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1078                                         __func__, i, tvp->u.buffer.data[i]);
1079         } else {
1080                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1081                                 tvp->u.data);
1082         }
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                 dev_dbg(fe->dvb->device, "%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                 dev_dbg(fe->dvb->device, "%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                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1110
1111                 switch (p->u.ofdm.bandwidth) {
1112                 case BANDWIDTH_10_MHZ:
1113                         c->bandwidth_hz = 10000000;
1114                         break;
1115                 case BANDWIDTH_8_MHZ:
1116                         c->bandwidth_hz = 8000000;
1117                         break;
1118                 case BANDWIDTH_7_MHZ:
1119                         c->bandwidth_hz = 7000000;
1120                         break;
1121                 case BANDWIDTH_6_MHZ:
1122                         c->bandwidth_hz = 6000000;
1123                         break;
1124                 case BANDWIDTH_5_MHZ:
1125                         c->bandwidth_hz = 5000000;
1126                         break;
1127                 case BANDWIDTH_1_712_MHZ:
1128                         c->bandwidth_hz = 1712000;
1129                         break;
1130                 case BANDWIDTH_AUTO:
1131                         c->bandwidth_hz = 0;
1132                 }
1133
1134                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1135                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1136                 c->modulation = p->u.ofdm.constellation;
1137                 c->transmission_mode = p->u.ofdm.transmission_mode;
1138                 c->guard_interval = p->u.ofdm.guard_interval;
1139                 c->hierarchy = p->u.ofdm.hierarchy_information;
1140                 break;
1141         case DVBV3_ATSC:
1142                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1143                 c->modulation = p->u.vsb.modulation;
1144                 if (c->delivery_system == SYS_ATSCMH)
1145                         break;
1146                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1147                         c->delivery_system = SYS_ATSC;
1148                 else
1149                         c->delivery_system = SYS_DVBC_ANNEX_B;
1150                 break;
1151         case DVBV3_UNKNOWN:
1152                 dev_err(fe->dvb->device,
1153                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1154                                 __func__, c->delivery_system);
1155                 return -EINVAL;
1156         }
1157
1158         return 0;
1159 }
1160
1161 /* Ensure the cached values are set correctly in the frontend
1162  * legacy tuning structures, for the advanced tuning API.
1163  */
1164 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1165                                             struct dvb_frontend_parameters *p)
1166 {
1167         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1168
1169         p->frequency = c->frequency;
1170         p->inversion = c->inversion;
1171
1172         switch (dvbv3_type(c->delivery_system)) {
1173         case DVBV3_UNKNOWN:
1174                 dev_err(fe->dvb->device,
1175                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1176                                 __func__, c->delivery_system);
1177                 return -EINVAL;
1178         case DVBV3_QPSK:
1179                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1180                 p->u.qpsk.symbol_rate = c->symbol_rate;
1181                 p->u.qpsk.fec_inner = c->fec_inner;
1182                 break;
1183         case DVBV3_QAM:
1184                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1185                 p->u.qam.symbol_rate = c->symbol_rate;
1186                 p->u.qam.fec_inner = c->fec_inner;
1187                 p->u.qam.modulation = c->modulation;
1188                 break;
1189         case DVBV3_OFDM:
1190                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
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                 dev_dbg(fe->dvb->device, "%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         case DTV_INTERLEAVING:
1330                 tvp->u.data = c->interleaving;
1331                 break;
1332
1333         /* ISDB-T Support here */
1334         case DTV_ISDBT_PARTIAL_RECEPTION:
1335                 tvp->u.data = c->isdbt_partial_reception;
1336                 break;
1337         case DTV_ISDBT_SOUND_BROADCASTING:
1338                 tvp->u.data = c->isdbt_sb_mode;
1339                 break;
1340         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1341                 tvp->u.data = c->isdbt_sb_subchannel;
1342                 break;
1343         case DTV_ISDBT_SB_SEGMENT_IDX:
1344                 tvp->u.data = c->isdbt_sb_segment_idx;
1345                 break;
1346         case DTV_ISDBT_SB_SEGMENT_COUNT:
1347                 tvp->u.data = c->isdbt_sb_segment_count;
1348                 break;
1349         case DTV_ISDBT_LAYER_ENABLED:
1350                 tvp->u.data = c->isdbt_layer_enabled;
1351                 break;
1352         case DTV_ISDBT_LAYERA_FEC:
1353                 tvp->u.data = c->layer[0].fec;
1354                 break;
1355         case DTV_ISDBT_LAYERA_MODULATION:
1356                 tvp->u.data = c->layer[0].modulation;
1357                 break;
1358         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1359                 tvp->u.data = c->layer[0].segment_count;
1360                 break;
1361         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1362                 tvp->u.data = c->layer[0].interleaving;
1363                 break;
1364         case DTV_ISDBT_LAYERB_FEC:
1365                 tvp->u.data = c->layer[1].fec;
1366                 break;
1367         case DTV_ISDBT_LAYERB_MODULATION:
1368                 tvp->u.data = c->layer[1].modulation;
1369                 break;
1370         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1371                 tvp->u.data = c->layer[1].segment_count;
1372                 break;
1373         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1374                 tvp->u.data = c->layer[1].interleaving;
1375                 break;
1376         case DTV_ISDBT_LAYERC_FEC:
1377                 tvp->u.data = c->layer[2].fec;
1378                 break;
1379         case DTV_ISDBT_LAYERC_MODULATION:
1380                 tvp->u.data = c->layer[2].modulation;
1381                 break;
1382         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1383                 tvp->u.data = c->layer[2].segment_count;
1384                 break;
1385         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1386                 tvp->u.data = c->layer[2].interleaving;
1387                 break;
1388
1389         /* Multistream support */
1390         case DTV_STREAM_ID:
1391         case DTV_DVBT2_PLP_ID_LEGACY:
1392                 tvp->u.data = c->stream_id;
1393                 break;
1394
1395         /* ATSC-MH */
1396         case DTV_ATSCMH_FIC_VER:
1397                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1398                 break;
1399         case DTV_ATSCMH_PARADE_ID:
1400                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1401                 break;
1402         case DTV_ATSCMH_NOG:
1403                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1404                 break;
1405         case DTV_ATSCMH_TNOG:
1406                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1407                 break;
1408         case DTV_ATSCMH_SGN:
1409                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1410                 break;
1411         case DTV_ATSCMH_PRC:
1412                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1413                 break;
1414         case DTV_ATSCMH_RS_FRAME_MODE:
1415                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1416                 break;
1417         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1418                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1419                 break;
1420         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1421                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1422                 break;
1423         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1424                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1425                 break;
1426         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1427                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1428                 break;
1429         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1430                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1431                 break;
1432         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1433                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1434                 break;
1435         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1436                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1437                 break;
1438         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1439                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1440                 break;
1441
1442         case DTV_LNA:
1443                 tvp->u.data = c->lna;
1444                 break;
1445
1446         default:
1447                 return -EINVAL;
1448         }
1449
1450         /* Allow the frontend to override outgoing properties */
1451         if (fe->ops.get_property) {
1452                 r = fe->ops.get_property(fe, tvp);
1453                 if (r < 0)
1454                         return r;
1455         }
1456
1457         dtv_property_dump(fe, tvp);
1458
1459         return 0;
1460 }
1461
1462 static int dtv_set_frontend(struct dvb_frontend *fe);
1463
1464 static bool is_dvbv3_delsys(u32 delsys)
1465 {
1466         bool status;
1467
1468         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1469                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1470
1471         return status;
1472 }
1473
1474 static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system)
1475 {
1476         int ncaps, i;
1477         u32 delsys = SYS_UNDEFINED;
1478         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1479         enum dvbv3_emulation_type type;
1480
1481         /*
1482          * It was reported that some old DVBv5 applications were
1483          * filling delivery_system with SYS_UNDEFINED. If this happens,
1484          * assume that the application wants to use the first supported
1485          * delivery system.
1486          */
1487         if (c->delivery_system == SYS_UNDEFINED)
1488                 c->delivery_system = fe->ops.delsys[0];
1489
1490         if (desired_system == SYS_UNDEFINED) {
1491                 /*
1492                  * A DVBv3 call doesn't know what's the desired system.
1493                  * Also, DVBv3 applications don't know that ops.info->type
1494                  * could be changed, and they simply dies when it doesn't
1495                  * match.
1496                  * So, don't change the current delivery system, as it
1497                  * may be trying to do the wrong thing, like setting an
1498                  * ISDB-T frontend as DVB-T. Instead, find the closest
1499                  * DVBv3 system that matches the delivery system.
1500                  */
1501                 if (is_dvbv3_delsys(c->delivery_system)) {
1502                         dev_dbg(fe->dvb->device,
1503                                         "%s: Using delivery system to %d\n",
1504                                         __func__, c->delivery_system);
1505                         return 0;
1506                 }
1507                 type = dvbv3_type(c->delivery_system);
1508                 switch (type) {
1509                 case DVBV3_QPSK:
1510                         desired_system = SYS_DVBS;
1511                         break;
1512                 case DVBV3_QAM:
1513                         desired_system = SYS_DVBC_ANNEX_A;
1514                         break;
1515                 case DVBV3_ATSC:
1516                         desired_system = SYS_ATSC;
1517                         break;
1518                 case DVBV3_OFDM:
1519                         desired_system = SYS_DVBT;
1520                         break;
1521                 default:
1522                         dev_dbg(fe->dvb->device, "%s: This frontend doesn't support DVBv3 calls\n",
1523                                         __func__);
1524                         return -EINVAL;
1525                 }
1526                 /*
1527                  * Get a delivery system that is compatible with DVBv3
1528                  * NOTE: in order for this to work with softwares like Kaffeine that
1529                  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1530                  *      DVB-S, drivers that support both should put the SYS_DVBS entry
1531                  *      before the SYS_DVBS2, otherwise it won't switch back to DVB-S.
1532                  *      The real fix is that userspace applications should not use DVBv3
1533                  *      and not trust on calling FE_SET_FRONTEND to switch the delivery
1534                  *      system.
1535                  */
1536                 ncaps = 0;
1537                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1538                         if (fe->ops.delsys[ncaps] == desired_system) {
1539                                 delsys = desired_system;
1540                                 break;
1541                         }
1542                         ncaps++;
1543                 }
1544                 if (delsys == SYS_UNDEFINED) {
1545                         dev_dbg(fe->dvb->device, "%s: Couldn't find a delivery system that matches %d\n",
1546                                         __func__, desired_system);
1547                 }
1548         } else {
1549                 /*
1550                  * This is a DVBv5 call. So, it likely knows the supported
1551                  * delivery systems.
1552                  */
1553
1554                 /* Check if the desired delivery system is supported */
1555                 ncaps = 0;
1556                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1557                         if (fe->ops.delsys[ncaps] == desired_system) {
1558                                 c->delivery_system = desired_system;
1559                                 dev_dbg(fe->dvb->device,
1560                                                 "%s: Changing delivery system to %d\n",
1561                                                 __func__, desired_system);
1562                                 return 0;
1563                         }
1564                         ncaps++;
1565                 }
1566                 type = dvbv3_type(desired_system);
1567
1568                 /*
1569                  * The delivery system is not supported. See if it can be
1570                  * emulated.
1571                  * The emulation only works if the desired system is one of the
1572                  * DVBv3 delivery systems
1573                  */
1574                 if (!is_dvbv3_delsys(desired_system)) {
1575                         dev_dbg(fe->dvb->device,
1576                                         "%s: can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n",
1577                                         __func__);
1578                         return -EINVAL;
1579                 }
1580
1581                 /*
1582                  * Get the last non-DVBv3 delivery system that has the same type
1583                  * of the desired system
1584                  */
1585                 ncaps = 0;
1586                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1587                         if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) &&
1588                             !is_dvbv3_delsys(fe->ops.delsys[ncaps]))
1589                                 delsys = fe->ops.delsys[ncaps];
1590                         ncaps++;
1591                 }
1592                 /* There's nothing compatible with the desired delivery system */
1593                 if (delsys == SYS_UNDEFINED) {
1594                         dev_dbg(fe->dvb->device,
1595                                         "%s: Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n",
1596                                         __func__);
1597                         return -EINVAL;
1598                 }
1599         }
1600
1601         c->delivery_system = delsys;
1602
1603         /*
1604          * The DVBv3 or DVBv5 call is requesting a different system. So,
1605          * emulation is needed.
1606          *
1607          * Emulate newer delivery systems like ISDBT, DVBT and DTMB
1608          * for older DVBv5 applications. The emulation will try to use
1609          * the auto mode for most things, and will assume that the desired
1610          * delivery system is the last one at the ops.delsys[] array
1611          */
1612         dev_dbg(fe->dvb->device,
1613                         "%s: Using delivery system %d emulated as if it were a %d\n",
1614                         __func__, delsys, desired_system);
1615
1616         /*
1617          * For now, handles ISDB-T calls. More code may be needed here for the
1618          * other emulated stuff
1619          */
1620         if (type == DVBV3_OFDM) {
1621                 if (c->delivery_system == SYS_ISDBT) {
1622                         dev_dbg(fe->dvb->device,
1623                                         "%s: Using defaults for SYS_ISDBT\n",
1624                                         __func__);
1625
1626                         if (!c->bandwidth_hz)
1627                                 c->bandwidth_hz = 6000000;
1628
1629                         c->isdbt_partial_reception = 0;
1630                         c->isdbt_sb_mode = 0;
1631                         c->isdbt_sb_subchannel = 0;
1632                         c->isdbt_sb_segment_idx = 0;
1633                         c->isdbt_sb_segment_count = 0;
1634                         c->isdbt_layer_enabled = 0;
1635                         for (i = 0; i < 3; i++) {
1636                                 c->layer[i].fec = FEC_AUTO;
1637                                 c->layer[i].modulation = QAM_AUTO;
1638                                 c->layer[i].interleaving = 0;
1639                                 c->layer[i].segment_count = 0;
1640                         }
1641                 }
1642         }
1643         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1644                         __func__, c->delivery_system);
1645
1646         return 0;
1647 }
1648
1649 static int dtv_property_process_set(struct dvb_frontend *fe,
1650                                     struct dtv_property *tvp,
1651                                     struct file *file)
1652 {
1653         int r = 0;
1654         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1655
1656         /* Allow the frontend to validate incoming properties */
1657         if (fe->ops.set_property) {
1658                 r = fe->ops.set_property(fe, tvp);
1659                 if (r < 0)
1660                         return r;
1661         }
1662
1663         switch(tvp->cmd) {
1664         case DTV_CLEAR:
1665                 /*
1666                  * Reset a cache of data specific to the frontend here. This does
1667                  * not effect hardware.
1668                  */
1669                 dvb_frontend_clear_cache(fe);
1670                 break;
1671         case DTV_TUNE:
1672                 /* interpret the cache of data, build either a traditional frontend
1673                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1674                  * ioctl.
1675                  */
1676                 c->state = tvp->cmd;
1677                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1678                                 __func__);
1679
1680                 r = dtv_set_frontend(fe);
1681                 break;
1682         case DTV_FREQUENCY:
1683                 c->frequency = tvp->u.data;
1684                 break;
1685         case DTV_MODULATION:
1686                 c->modulation = tvp->u.data;
1687                 break;
1688         case DTV_BANDWIDTH_HZ:
1689                 c->bandwidth_hz = tvp->u.data;
1690                 break;
1691         case DTV_INVERSION:
1692                 c->inversion = tvp->u.data;
1693                 break;
1694         case DTV_SYMBOL_RATE:
1695                 c->symbol_rate = tvp->u.data;
1696                 break;
1697         case DTV_INNER_FEC:
1698                 c->fec_inner = tvp->u.data;
1699                 break;
1700         case DTV_PILOT:
1701                 c->pilot = tvp->u.data;
1702                 break;
1703         case DTV_ROLLOFF:
1704                 c->rolloff = tvp->u.data;
1705                 break;
1706         case DTV_DELIVERY_SYSTEM:
1707                 r = set_delivery_system(fe, tvp->u.data);
1708                 break;
1709         case DTV_VOLTAGE:
1710                 c->voltage = tvp->u.data;
1711                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1712                         (void *)c->voltage);
1713                 break;
1714         case DTV_TONE:
1715                 c->sectone = tvp->u.data;
1716                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1717                         (void *)c->sectone);
1718                 break;
1719         case DTV_CODE_RATE_HP:
1720                 c->code_rate_HP = tvp->u.data;
1721                 break;
1722         case DTV_CODE_RATE_LP:
1723                 c->code_rate_LP = tvp->u.data;
1724                 break;
1725         case DTV_GUARD_INTERVAL:
1726                 c->guard_interval = tvp->u.data;
1727                 break;
1728         case DTV_TRANSMISSION_MODE:
1729                 c->transmission_mode = tvp->u.data;
1730                 break;
1731         case DTV_HIERARCHY:
1732                 c->hierarchy = tvp->u.data;
1733                 break;
1734         case DTV_INTERLEAVING:
1735                 c->interleaving = tvp->u.data;
1736                 break;
1737
1738         /* ISDB-T Support here */
1739         case DTV_ISDBT_PARTIAL_RECEPTION:
1740                 c->isdbt_partial_reception = tvp->u.data;
1741                 break;
1742         case DTV_ISDBT_SOUND_BROADCASTING:
1743                 c->isdbt_sb_mode = tvp->u.data;
1744                 break;
1745         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1746                 c->isdbt_sb_subchannel = tvp->u.data;
1747                 break;
1748         case DTV_ISDBT_SB_SEGMENT_IDX:
1749                 c->isdbt_sb_segment_idx = tvp->u.data;
1750                 break;
1751         case DTV_ISDBT_SB_SEGMENT_COUNT:
1752                 c->isdbt_sb_segment_count = tvp->u.data;
1753                 break;
1754         case DTV_ISDBT_LAYER_ENABLED:
1755                 c->isdbt_layer_enabled = tvp->u.data;
1756                 break;
1757         case DTV_ISDBT_LAYERA_FEC:
1758                 c->layer[0].fec = tvp->u.data;
1759                 break;
1760         case DTV_ISDBT_LAYERA_MODULATION:
1761                 c->layer[0].modulation = tvp->u.data;
1762                 break;
1763         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1764                 c->layer[0].segment_count = tvp->u.data;
1765                 break;
1766         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1767                 c->layer[0].interleaving = tvp->u.data;
1768                 break;
1769         case DTV_ISDBT_LAYERB_FEC:
1770                 c->layer[1].fec = tvp->u.data;
1771                 break;
1772         case DTV_ISDBT_LAYERB_MODULATION:
1773                 c->layer[1].modulation = tvp->u.data;
1774                 break;
1775         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1776                 c->layer[1].segment_count = tvp->u.data;
1777                 break;
1778         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1779                 c->layer[1].interleaving = tvp->u.data;
1780                 break;
1781         case DTV_ISDBT_LAYERC_FEC:
1782                 c->layer[2].fec = tvp->u.data;
1783                 break;
1784         case DTV_ISDBT_LAYERC_MODULATION:
1785                 c->layer[2].modulation = tvp->u.data;
1786                 break;
1787         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1788                 c->layer[2].segment_count = tvp->u.data;
1789                 break;
1790         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1791                 c->layer[2].interleaving = tvp->u.data;
1792                 break;
1793
1794         /* Multistream support */
1795         case DTV_STREAM_ID:
1796         case DTV_DVBT2_PLP_ID_LEGACY:
1797                 c->stream_id = tvp->u.data;
1798                 break;
1799
1800         /* ATSC-MH */
1801         case DTV_ATSCMH_PARADE_ID:
1802                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1803                 break;
1804         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1805                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1806                 break;
1807
1808         case DTV_LNA:
1809                 c->lna = tvp->u.data;
1810                 if (fe->ops.set_lna)
1811                         r = fe->ops.set_lna(fe);
1812                 break;
1813
1814         default:
1815                 return -EINVAL;
1816         }
1817
1818         return r;
1819 }
1820
1821 static int dvb_frontend_ioctl(struct file *file,
1822                         unsigned int cmd, void *parg)
1823 {
1824         struct dvb_device *dvbdev = file->private_data;
1825         struct dvb_frontend *fe = dvbdev->priv;
1826         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1827         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1828         int err = -ENOTTY;
1829
1830         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1831         if (down_interruptible(&fepriv->sem))
1832                 return -ERESTARTSYS;
1833
1834         if (fepriv->exit != DVB_FE_NO_EXIT) {
1835                 up(&fepriv->sem);
1836                 return -ENODEV;
1837         }
1838
1839         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1840             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1841              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1842                 up(&fepriv->sem);
1843                 return -EPERM;
1844         }
1845
1846         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1847                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1848         else {
1849                 c->state = DTV_UNDEFINED;
1850                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1851         }
1852
1853         up(&fepriv->sem);
1854         return err;
1855 }
1856
1857 static int dvb_frontend_ioctl_properties(struct file *file,
1858                         unsigned int cmd, void *parg)
1859 {
1860         struct dvb_device *dvbdev = file->private_data;
1861         struct dvb_frontend *fe = dvbdev->priv;
1862         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1863         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1864         int err = 0;
1865
1866         struct dtv_properties *tvps = NULL;
1867         struct dtv_property *tvp = NULL;
1868         int i;
1869
1870         dev_dbg(fe->dvb->device, "%s:\n", __func__);
1871
1872         if(cmd == FE_SET_PROPERTY) {
1873                 tvps = (struct dtv_properties __user *)parg;
1874
1875                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1876                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1877
1878                 /* Put an arbitrary limit on the number of messages that can
1879                  * be sent at once */
1880                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1881                         return -EINVAL;
1882
1883                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1884                 if (!tvp) {
1885                         err = -ENOMEM;
1886                         goto out;
1887                 }
1888
1889                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1890                         err = -EFAULT;
1891                         goto out;
1892                 }
1893
1894                 for (i = 0; i < tvps->num; i++) {
1895                         err = dtv_property_process_set(fe, tvp + i, file);
1896                         if (err < 0)
1897                                 goto out;
1898                         (tvp + i)->result = err;
1899                 }
1900
1901                 if (c->state == DTV_TUNE)
1902                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1903
1904         } else
1905         if(cmd == FE_GET_PROPERTY) {
1906                 tvps = (struct dtv_properties __user *)parg;
1907
1908                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1909                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1910
1911                 /* Put an arbitrary limit on the number of messages that can
1912                  * be sent at once */
1913                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1914                         return -EINVAL;
1915
1916                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1917                 if (!tvp) {
1918                         err = -ENOMEM;
1919                         goto out;
1920                 }
1921
1922                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1923                         err = -EFAULT;
1924                         goto out;
1925                 }
1926
1927                 /*
1928                  * Fills the cache out struct with the cache contents, plus
1929                  * the data retrieved from get_frontend, if the frontend
1930                  * is not idle. Otherwise, returns the cached content
1931                  */
1932                 if (fepriv->state != FESTATE_IDLE) {
1933                         err = dtv_get_frontend(fe, NULL);
1934                         if (err < 0)
1935                                 goto out;
1936                 }
1937                 for (i = 0; i < tvps->num; i++) {
1938                         err = dtv_property_process_get(fe, c, tvp + i, file);
1939                         if (err < 0)
1940                                 goto out;
1941                         (tvp + i)->result = err;
1942                 }
1943
1944                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1945                         err = -EFAULT;
1946                         goto out;
1947                 }
1948
1949         } else
1950                 err = -ENOTTY;
1951
1952 out:
1953         kfree(tvp);
1954         return err;
1955 }
1956
1957 static int dtv_set_frontend(struct dvb_frontend *fe)
1958 {
1959         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1960         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1961         struct dvb_frontend_tune_settings fetunesettings;
1962         u32 rolloff = 0;
1963
1964         if (dvb_frontend_check_parameters(fe) < 0)
1965                 return -EINVAL;
1966
1967         /*
1968          * Initialize output parameters to match the values given by
1969          * the user. FE_SET_FRONTEND triggers an initial frontend event
1970          * with status = 0, which copies output parameters to userspace.
1971          */
1972         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
1973
1974         /*
1975          * Be sure that the bandwidth will be filled for all
1976          * non-satellite systems, as tuners need to know what
1977          * low pass/Nyquist half filter should be applied, in
1978          * order to avoid inter-channel noise.
1979          *
1980          * ISDB-T and DVB-T/T2 already sets bandwidth.
1981          * ATSC and DVB-C don't set, so, the core should fill it.
1982          *
1983          * On DVB-C Annex A and C, the bandwidth is a function of
1984          * the roll-off and symbol rate. Annex B defines different
1985          * roll-off factors depending on the modulation. Fortunately,
1986          * Annex B is only used with 6MHz, so there's no need to
1987          * calculate it.
1988          *
1989          * While not officially supported, a side effect of handling it at
1990          * the cache level is that a program could retrieve the bandwidth
1991          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1992          */
1993         switch (c->delivery_system) {
1994         case SYS_ATSC:
1995         case SYS_DVBC_ANNEX_B:
1996                 c->bandwidth_hz = 6000000;
1997                 break;
1998         case SYS_DVBC_ANNEX_A:
1999                 rolloff = 115;
2000                 break;
2001         case SYS_DVBC_ANNEX_C:
2002                 rolloff = 113;
2003                 break;
2004         default:
2005                 break;
2006         }
2007         if (rolloff)
2008                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
2009
2010         /* force auto frequency inversion if requested */
2011         if (dvb_force_auto_inversion)
2012                 c->inversion = INVERSION_AUTO;
2013
2014         /*
2015          * without hierarchical coding code_rate_LP is irrelevant,
2016          * so we tolerate the otherwise invalid FEC_NONE setting
2017          */
2018         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2019                 c->code_rate_LP = FEC_AUTO;
2020
2021         /* get frontend-specific tuning settings */
2022         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2023         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2024                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2025                 fepriv->max_drift = fetunesettings.max_drift;
2026                 fepriv->step_size = fetunesettings.step_size;
2027         } else {
2028                 /* default values */
2029                 switch (c->delivery_system) {
2030                 case SYS_DVBS:
2031                 case SYS_DVBS2:
2032                 case SYS_ISDBS:
2033                 case SYS_TURBO:
2034                 case SYS_DVBC_ANNEX_A:
2035                 case SYS_DVBC_ANNEX_C:
2036                         fepriv->min_delay = HZ / 20;
2037                         fepriv->step_size = c->symbol_rate / 16000;
2038                         fepriv->max_drift = c->symbol_rate / 2000;
2039                         break;
2040                 case SYS_DVBT:
2041                 case SYS_DVBT2:
2042                 case SYS_ISDBT:
2043                 case SYS_DTMB:
2044                         fepriv->min_delay = HZ / 20;
2045                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2046                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2047                         break;
2048                 default:
2049                         /*
2050                          * FIXME: This sounds wrong! if freqency_stepsize is
2051                          * defined by the frontend, why not use it???
2052                          */
2053                         fepriv->min_delay = HZ / 20;
2054                         fepriv->step_size = 0; /* no zigzag */
2055                         fepriv->max_drift = 0;
2056                         break;
2057                 }
2058         }
2059         if (dvb_override_tune_delay > 0)
2060                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2061
2062         fepriv->state = FESTATE_RETUNE;
2063
2064         /* Request the search algorithm to search */
2065         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2066
2067         dvb_frontend_clear_events(fe);
2068         dvb_frontend_add_event(fe, 0);
2069         dvb_frontend_wakeup(fe);
2070         fepriv->status = 0;
2071
2072         return 0;
2073 }
2074
2075
2076 static int dvb_frontend_ioctl_legacy(struct file *file,
2077                         unsigned int cmd, void *parg)
2078 {
2079         struct dvb_device *dvbdev = file->private_data;
2080         struct dvb_frontend *fe = dvbdev->priv;
2081         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2082         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2083         int err = -ENOTTY;
2084
2085         switch (cmd) {
2086         case FE_GET_INFO: {
2087                 struct dvb_frontend_info* info = parg;
2088
2089                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2090                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2091
2092                 /*
2093                  * Associate the 4 delivery systems supported by DVBv3
2094                  * API with their DVBv5 counterpart. For the other standards,
2095                  * use the closest type, assuming that it would hopefully
2096                  * work with a DVBv3 application.
2097                  * It should be noticed that, on multi-frontend devices with
2098                  * different types (terrestrial and cable, for example),
2099                  * a pure DVBv3 application won't be able to use all delivery
2100                  * systems. Yet, changing the DVBv5 cache to the other delivery
2101                  * system should be enough for making it work.
2102                  */
2103                 switch (dvbv3_type(c->delivery_system)) {
2104                 case DVBV3_QPSK:
2105                         info->type = FE_QPSK;
2106                         break;
2107                 case DVBV3_ATSC:
2108                         info->type = FE_ATSC;
2109                         break;
2110                 case DVBV3_QAM:
2111                         info->type = FE_QAM;
2112                         break;
2113                 case DVBV3_OFDM:
2114                         info->type = FE_OFDM;
2115                         break;
2116                 default:
2117                         dev_err(fe->dvb->device,
2118                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2119                                         __func__, c->delivery_system);
2120                         fe->ops.info.type = FE_OFDM;
2121                 }
2122                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2123                                  __func__, c->delivery_system, fe->ops.info.type);
2124
2125                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2126                  * do it, it is done for it. */
2127                 info->caps |= FE_CAN_INVERSION_AUTO;
2128                 err = 0;
2129                 break;
2130         }
2131
2132         case FE_READ_STATUS: {
2133                 fe_status_t* status = parg;
2134
2135                 /* if retune was requested but hasn't occurred yet, prevent
2136                  * that user get signal state from previous tuning */
2137                 if (fepriv->state == FESTATE_RETUNE ||
2138                     fepriv->state == FESTATE_ERROR) {
2139                         err=0;
2140                         *status = 0;
2141                         break;
2142                 }
2143
2144                 if (fe->ops.read_status)
2145                         err = fe->ops.read_status(fe, status);
2146                 break;
2147         }
2148
2149         case FE_READ_BER:
2150                 if (fe->ops.read_ber) {
2151                         if (fepriv->thread)
2152                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2153                         else
2154                                 err = -EAGAIN;
2155                 }
2156                 break;
2157
2158         case FE_READ_SIGNAL_STRENGTH:
2159                 if (fe->ops.read_signal_strength) {
2160                         if (fepriv->thread)
2161                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2162                         else
2163                                 err = -EAGAIN;
2164                 }
2165                 break;
2166
2167         case FE_READ_SNR:
2168                 if (fe->ops.read_snr) {
2169                         if (fepriv->thread)
2170                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2171                         else
2172                                 err = -EAGAIN;
2173                 }
2174                 break;
2175
2176         case FE_READ_UNCORRECTED_BLOCKS:
2177                 if (fe->ops.read_ucblocks) {
2178                         if (fepriv->thread)
2179                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2180                         else
2181                                 err = -EAGAIN;
2182                 }
2183                 break;
2184
2185         case FE_DISEQC_RESET_OVERLOAD:
2186                 if (fe->ops.diseqc_reset_overload) {
2187                         err = fe->ops.diseqc_reset_overload(fe);
2188                         fepriv->state = FESTATE_DISEQC;
2189                         fepriv->status = 0;
2190                 }
2191                 break;
2192
2193         case FE_DISEQC_SEND_MASTER_CMD:
2194                 if (fe->ops.diseqc_send_master_cmd) {
2195                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2196                         fepriv->state = FESTATE_DISEQC;
2197                         fepriv->status = 0;
2198                 }
2199                 break;
2200
2201         case FE_DISEQC_SEND_BURST:
2202                 if (fe->ops.diseqc_send_burst) {
2203                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2204                         fepriv->state = FESTATE_DISEQC;
2205                         fepriv->status = 0;
2206                 }
2207                 break;
2208
2209         case FE_SET_TONE:
2210                 if (fe->ops.set_tone) {
2211                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2212                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2213                         fepriv->state = FESTATE_DISEQC;
2214                         fepriv->status = 0;
2215                 }
2216                 break;
2217
2218         case FE_SET_VOLTAGE:
2219                 if (fe->ops.set_voltage) {
2220                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2221                         fepriv->voltage = (fe_sec_voltage_t) parg;
2222                         fepriv->state = FESTATE_DISEQC;
2223                         fepriv->status = 0;
2224                 }
2225                 break;
2226
2227         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2228                 if (fe->ops.dishnetwork_send_legacy_command) {
2229                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2230                         fepriv->state = FESTATE_DISEQC;
2231                         fepriv->status = 0;
2232                 } else if (fe->ops.set_voltage) {
2233                         /*
2234                          * NOTE: This is a fallback condition.  Some frontends
2235                          * (stv0299 for instance) take longer than 8msec to
2236                          * respond to a set_voltage command.  Those switches
2237                          * need custom routines to switch properly.  For all
2238                          * other frontends, the following should work ok.
2239                          * Dish network legacy switches (as used by Dish500)
2240                          * are controlled by sending 9-bit command words
2241                          * spaced 8msec apart.
2242                          * the actual command word is switch/port dependent
2243                          * so it is up to the userspace application to send
2244                          * the right command.
2245                          * The command must always start with a '0' after
2246                          * initialization, so parg is 8 bits and does not
2247                          * include the initialization or start bit
2248                          */
2249                         unsigned long swcmd = ((unsigned long) parg) << 1;
2250                         struct timeval nexttime;
2251                         struct timeval tv[10];
2252                         int i;
2253                         u8 last = 1;
2254                         if (dvb_frontend_debug)
2255                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2256                         do_gettimeofday(&nexttime);
2257                         if (dvb_frontend_debug)
2258                                 tv[0] = nexttime;
2259                         /* before sending a command, initialize by sending
2260                          * a 32ms 18V to the switch
2261                          */
2262                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2263                         dvb_frontend_sleep_until(&nexttime, 32000);
2264
2265                         for (i = 0; i < 9; i++) {
2266                                 if (dvb_frontend_debug)
2267                                         do_gettimeofday(&tv[i + 1]);
2268                                 if ((swcmd & 0x01) != last) {
2269                                         /* set voltage to (last ? 13V : 18V) */
2270                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2271                                         last = (last) ? 0 : 1;
2272                                 }
2273                                 swcmd = swcmd >> 1;
2274                                 if (i != 8)
2275                                         dvb_frontend_sleep_until(&nexttime, 8000);
2276                         }
2277                         if (dvb_frontend_debug) {
2278                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2279                                         __func__, fe->dvb->num);
2280                                 for (i = 1; i < 10; i++)
2281                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2282                         }
2283                         err = 0;
2284                         fepriv->state = FESTATE_DISEQC;
2285                         fepriv->status = 0;
2286                 }
2287                 break;
2288
2289         case FE_DISEQC_RECV_SLAVE_REPLY:
2290                 if (fe->ops.diseqc_recv_slave_reply)
2291                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2292                 break;
2293
2294         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2295                 if (fe->ops.enable_high_lnb_voltage)
2296                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2297                 break;
2298
2299         case FE_SET_FRONTEND:
2300                 err = set_delivery_system(fe, SYS_UNDEFINED);
2301                 if (err)
2302                         break;
2303
2304                 err = dtv_property_cache_sync(fe, c, parg);
2305                 if (err)
2306                         break;
2307                 err = dtv_set_frontend(fe);
2308                 break;
2309         case FE_GET_EVENT:
2310                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2311                 break;
2312
2313         case FE_GET_FRONTEND:
2314                 err = dtv_get_frontend(fe, parg);
2315                 break;
2316
2317         case FE_SET_FRONTEND_TUNE_MODE:
2318                 fepriv->tune_mode_flags = (unsigned long) parg;
2319                 err = 0;
2320                 break;
2321         }
2322
2323         return err;
2324 }
2325
2326
2327 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2328 {
2329         struct dvb_device *dvbdev = file->private_data;
2330         struct dvb_frontend *fe = dvbdev->priv;
2331         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2332
2333         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2334
2335         poll_wait (file, &fepriv->events.wait_queue, wait);
2336
2337         if (fepriv->events.eventw != fepriv->events.eventr)
2338                 return (POLLIN | POLLRDNORM | POLLPRI);
2339
2340         return 0;
2341 }
2342
2343 static int dvb_frontend_open(struct inode *inode, struct file *file)
2344 {
2345         struct dvb_device *dvbdev = file->private_data;
2346         struct dvb_frontend *fe = dvbdev->priv;
2347         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2348         struct dvb_adapter *adapter = fe->dvb;
2349         int ret;
2350
2351         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2352         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2353                 return -ENODEV;
2354
2355         if (adapter->mfe_shared) {
2356                 mutex_lock (&adapter->mfe_lock);
2357
2358                 if (adapter->mfe_dvbdev == NULL)
2359                         adapter->mfe_dvbdev = dvbdev;
2360
2361                 else if (adapter->mfe_dvbdev != dvbdev) {
2362                         struct dvb_device
2363                                 *mfedev = adapter->mfe_dvbdev;
2364                         struct dvb_frontend
2365                                 *mfe = mfedev->priv;
2366                         struct dvb_frontend_private
2367                                 *mfepriv = mfe->frontend_priv;
2368                         int mferetry = (dvb_mfe_wait_time << 1);
2369
2370                         mutex_unlock (&adapter->mfe_lock);
2371                         while (mferetry-- && (mfedev->users != -1 ||
2372                                         mfepriv->thread != NULL)) {
2373                                 if(msleep_interruptible(500)) {
2374                                         if(signal_pending(current))
2375                                                 return -EINTR;
2376                                 }
2377                         }
2378
2379                         mutex_lock (&adapter->mfe_lock);
2380                         if(adapter->mfe_dvbdev != dvbdev) {
2381                                 mfedev = adapter->mfe_dvbdev;
2382                                 mfe = mfedev->priv;
2383                                 mfepriv = mfe->frontend_priv;
2384                                 if (mfedev->users != -1 ||
2385                                                 mfepriv->thread != NULL) {
2386                                         mutex_unlock (&adapter->mfe_lock);
2387                                         return -EBUSY;
2388                                 }
2389                                 adapter->mfe_dvbdev = dvbdev;
2390                         }
2391                 }
2392         }
2393
2394         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2395                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2396                         goto err0;
2397
2398                 /* If we took control of the bus, we need to force
2399                    reinitialization.  This is because many ts_bus_ctrl()
2400                    functions strobe the RESET pin on the demod, and if the
2401                    frontend thread already exists then the dvb_init() routine
2402                    won't get called (which is what usually does initial
2403                    register configuration). */
2404                 fepriv->reinitialise = 1;
2405         }
2406
2407         if ((ret = dvb_generic_open (inode, file)) < 0)
2408                 goto err1;
2409
2410         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2411                 /* normal tune mode when opened R/W */
2412                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2413                 fepriv->tone = -1;
2414                 fepriv->voltage = -1;
2415
2416                 ret = dvb_frontend_start (fe);
2417                 if (ret)
2418                         goto err2;
2419
2420                 /*  empty event queue */
2421                 fepriv->events.eventr = fepriv->events.eventw = 0;
2422         }
2423
2424         if (adapter->mfe_shared)
2425                 mutex_unlock (&adapter->mfe_lock);
2426         return ret;
2427
2428 err2:
2429         dvb_generic_release(inode, file);
2430 err1:
2431         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2432                 fe->ops.ts_bus_ctrl(fe, 0);
2433 err0:
2434         if (adapter->mfe_shared)
2435                 mutex_unlock (&adapter->mfe_lock);
2436         return ret;
2437 }
2438
2439 static int dvb_frontend_release(struct inode *inode, struct file *file)
2440 {
2441         struct dvb_device *dvbdev = file->private_data;
2442         struct dvb_frontend *fe = dvbdev->priv;
2443         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2444         int ret;
2445
2446         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2447
2448         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2449                 fepriv->release_jiffies = jiffies;
2450                 mb();
2451         }
2452
2453         ret = dvb_generic_release (inode, file);
2454
2455         if (dvbdev->users == -1) {
2456                 wake_up(&fepriv->wait_queue);
2457                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2458                         fops_put(file->f_op);
2459                         file->f_op = NULL;
2460                         wake_up(&dvbdev->wait_queue);
2461                 }
2462                 if (fe->ops.ts_bus_ctrl)
2463                         fe->ops.ts_bus_ctrl(fe, 0);
2464         }
2465
2466         return ret;
2467 }
2468
2469 static const struct file_operations dvb_frontend_fops = {
2470         .owner          = THIS_MODULE,
2471         .unlocked_ioctl = dvb_generic_ioctl,
2472         .poll           = dvb_frontend_poll,
2473         .open           = dvb_frontend_open,
2474         .release        = dvb_frontend_release,
2475         .llseek         = noop_llseek,
2476 };
2477
2478 int dvb_frontend_suspend(struct dvb_frontend *fe)
2479 {
2480         int ret = 0;
2481
2482         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2483                         fe->id);
2484
2485         if (fe->ops.tuner_ops.sleep)
2486                 ret = fe->ops.tuner_ops.sleep(fe);
2487
2488         if (fe->ops.sleep)
2489                 ret = fe->ops.sleep(fe);
2490
2491         return ret;
2492 }
2493 EXPORT_SYMBOL(dvb_frontend_suspend);
2494
2495 int dvb_frontend_resume(struct dvb_frontend *fe)
2496 {
2497         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2498         int ret = 0;
2499
2500         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2501                         fe->id);
2502
2503         if (fe->ops.init)
2504                 ret = fe->ops.init(fe);
2505
2506         if (fe->ops.tuner_ops.init)
2507                 ret = fe->ops.tuner_ops.init(fe);
2508
2509         fepriv->state = FESTATE_RETUNE;
2510         dvb_frontend_wakeup(fe);
2511
2512         return ret;
2513 }
2514 EXPORT_SYMBOL(dvb_frontend_resume);
2515
2516 int dvb_register_frontend(struct dvb_adapter* dvb,
2517                           struct dvb_frontend* fe)
2518 {
2519         struct dvb_frontend_private *fepriv;
2520         static const struct dvb_device dvbdev_template = {
2521                 .users = ~0,
2522                 .writers = 1,
2523                 .readers = (~0)-1,
2524                 .fops = &dvb_frontend_fops,
2525                 .kernel_ioctl = dvb_frontend_ioctl
2526         };
2527
2528         dev_dbg(dvb->device, "%s:\n", __func__);
2529
2530         if (mutex_lock_interruptible(&frontend_mutex))
2531                 return -ERESTARTSYS;
2532
2533         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2534         if (fe->frontend_priv == NULL) {
2535                 mutex_unlock(&frontend_mutex);
2536                 return -ENOMEM;
2537         }
2538         fepriv = fe->frontend_priv;
2539
2540         sema_init(&fepriv->sem, 1);
2541         init_waitqueue_head (&fepriv->wait_queue);
2542         init_waitqueue_head (&fepriv->events.wait_queue);
2543         mutex_init(&fepriv->events.mtx);
2544         fe->dvb = dvb;
2545         fepriv->inversion = INVERSION_OFF;
2546
2547         dev_info(fe->dvb->device,
2548                         "DVB: registering adapter %i frontend %i (%s)...\n",
2549                         fe->dvb->num, fe->id, fe->ops.info.name);
2550
2551         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2552                              fe, DVB_DEVICE_FRONTEND);
2553
2554         /*
2555          * Initialize the cache to the proper values according with the
2556          * first supported delivery system (ops->delsys[0])
2557          */
2558
2559         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2560         dvb_frontend_clear_cache(fe);
2561
2562         mutex_unlock(&frontend_mutex);
2563         return 0;
2564 }
2565 EXPORT_SYMBOL(dvb_register_frontend);
2566
2567 int dvb_unregister_frontend(struct dvb_frontend* fe)
2568 {
2569         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2570         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2571
2572         mutex_lock(&frontend_mutex);
2573         dvb_frontend_stop (fe);
2574         mutex_unlock(&frontend_mutex);
2575
2576         if (fepriv->dvbdev->users < -1)
2577                 wait_event(fepriv->dvbdev->wait_queue,
2578                                 fepriv->dvbdev->users==-1);
2579
2580         mutex_lock(&frontend_mutex);
2581         dvb_unregister_device (fepriv->dvbdev);
2582
2583         /* fe is invalid now */
2584         kfree(fepriv);
2585         mutex_unlock(&frontend_mutex);
2586         return 0;
2587 }
2588 EXPORT_SYMBOL(dvb_unregister_frontend);
2589
2590 #ifdef CONFIG_MEDIA_ATTACH
2591 void dvb_frontend_detach(struct dvb_frontend* fe)
2592 {
2593         void *ptr;
2594
2595         if (fe->ops.release_sec) {
2596                 fe->ops.release_sec(fe);
2597                 symbol_put_addr(fe->ops.release_sec);
2598         }
2599         if (fe->ops.tuner_ops.release) {
2600                 fe->ops.tuner_ops.release(fe);
2601                 symbol_put_addr(fe->ops.tuner_ops.release);
2602         }
2603         if (fe->ops.analog_ops.release) {
2604                 fe->ops.analog_ops.release(fe);
2605                 symbol_put_addr(fe->ops.analog_ops.release);
2606         }
2607         ptr = (void*)fe->ops.release;
2608         if (ptr) {
2609                 fe->ops.release(fe);
2610                 symbol_put_addr(ptr);
2611         }
2612 }
2613 #else
2614 void dvb_frontend_detach(struct dvb_frontend* fe)
2615 {
2616         if (fe->ops.release_sec)
2617                 fe->ops.release_sec(fe);
2618         if (fe->ops.tuner_ops.release)
2619                 fe->ops.tuner_ops.release(fe);
2620         if (fe->ops.analog_ops.release)
2621                 fe->ops.analog_ops.release(fe);
2622         if (fe->ops.release)
2623                 fe->ops.release(fe);
2624 }
2625 #endif
2626 EXPORT_SYMBOL(dvb_frontend_detach);