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 static DEFINE_MUTEX(frontend_mutex);
 100
 101 struct dvb_frontend_private {
 102
 103         /* thread/frontend values */
 104         struct dvb_device *dvbdev;
 105         struct dvb_frontend_parameters parameters_out;
 106         struct dvb_fe_events events;
 107         struct semaphore sem;
 108         struct list_head list_head;
 109         wait_queue_head_t wait_queue;
 110         struct task_struct *thread;
 111         unsigned long release_jiffies;
 112         unsigned int wakeup;
 113         fe_status_t status;
 114         unsigned long tune_mode_flags;
 115         unsigned int delay;
 116         unsigned int reinitialise;
 117         int tone;
 118         int voltage;
 119
 120         /* swzigzag values */
 121         unsigned int state;
 122         unsigned int bending;
 123         int lnb_drift;
 124         unsigned int inversion;
 125         unsigned int auto_step;
 126         unsigned int auto_sub_step;
 127         unsigned int started_auto_step;
 128         unsigned int min_delay;
 129         unsigned int max_drift;
 130         unsigned int step_size;
 131         int quality;
 132         unsigned int check_wrapped;
 133         enum dvbfe_search algo_status;
 134 };
 135
 136 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 137 static int dtv_get_frontend(struct dvb_frontend *fe,
 138                             struct dvb_frontend_parameters *p_out);
 139 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 140                                            struct dvb_frontend_parameters *p);
 141
 142 static bool has_get_frontend(struct dvb_frontend *fe)
 143 {
 144         return fe->ops.get_frontend != NULL;
 145 }
 146
 147 /*
 148  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 149  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 150  * otherwise, a DVBv3 call will fail.
 151  */
 152 enum dvbv3_emulation_type {
 153         DVBV3_UNKNOWN,
 154         DVBV3_QPSK,
 155         DVBV3_QAM,
 156         DVBV3_OFDM,
 157         DVBV3_ATSC,
 158 };
 159
 160 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 161 {
 162         switch (delivery_system) {
 163         case SYS_DVBC_ANNEX_A:
 164         case SYS_DVBC_ANNEX_C:
 165                 return DVBV3_QAM;
 166         case SYS_DVBS:
 167         case SYS_DVBS2:
 168         case SYS_TURBO:
 169         case SYS_ISDBS:
 170         case SYS_DSS:
 171                 return DVBV3_QPSK;
 172         case SYS_DVBT:
 173         case SYS_DVBT2:
 174         case SYS_ISDBT:
 175         case SYS_DTMB:
 176                 return DVBV3_OFDM;
 177         case SYS_ATSC:
 178         case SYS_ATSCMH:
 179         case SYS_DVBC_ANNEX_B:
 180                 return DVBV3_ATSC;
 181         case SYS_UNDEFINED:
 182         case SYS_ISDBC:
 183         case SYS_DVBH:
 184         case SYS_DAB:
 185         default:
 186                 /*
 187                  * Doesn't know how to emulate those types and/or
 188                  * there's no frontend driver from this type yet
 189                  * with some emulation code, so, we're not sure yet how
 190                  * to handle them, or they're not compatible with a DVBv3 call.
 191                  */
 192                 return DVBV3_UNKNOWN;
 193         }
 194 }
 195
 196 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 197 {
 198         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 199         struct dvb_fe_events *events = &fepriv->events;
 200         struct dvb_frontend_event *e;
 201         int wp;
 202
 203         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 204
 205         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 206                 dtv_get_frontend(fe, &fepriv->parameters_out);
 207
 208         mutex_lock(&events->mtx);
 209
 210         wp = (events->eventw + 1) % MAX_EVENT;
 211         if (wp == events->eventr) {
 212                 events->overflow = 1;
 213                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 214         }
 215
 216         e = &events->events[events->eventw];
 217         e->status = status;
 218         e->parameters = fepriv->parameters_out;
 219
 220         events->eventw = wp;
 221
 222         mutex_unlock(&events->mtx);
 223
 224         wake_up_interruptible (&events->wait_queue);
 225 }
 226
 227 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 228                             struct dvb_frontend_event *event, int flags)
 229 {
 230         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 231         struct dvb_fe_events *events = &fepriv->events;
 232
 233         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 234
 235         if (events->overflow) {
 236                 events->overflow = 0;
 237                 return -EOVERFLOW;
 238         }
 239
 240         if (events->eventw == events->eventr) {
 241                 int ret;
 242
 243                 if (flags & O_NONBLOCK)
 244                         return -EWOULDBLOCK;
 245
 246                 up(&fepriv->sem);
 247
 248                 ret = wait_event_interruptible (events->wait_queue,
 249                                                 events->eventw != events->eventr);
 250
 251                 if (down_interruptible (&fepriv->sem))
 252                         return -ERESTARTSYS;
 253
 254                 if (ret < 0)
 255                         return ret;
 256         }
 257
 258         mutex_lock(&events->mtx);
 259         *event = events->events[events->eventr];
 260         events->eventr = (events->eventr + 1) % MAX_EVENT;
 261         mutex_unlock(&events->mtx);
 262
 263         return 0;
 264 }
 265
 266 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 267 {
 268         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 269         struct dvb_fe_events *events = &fepriv->events;
 270
 271         mutex_lock(&events->mtx);
 272         events->eventr = events->eventw;
 273         mutex_unlock(&events->mtx);
 274 }
 275
 276 static void dvb_frontend_init(struct dvb_frontend *fe)
 277 {
 278         dev_dbg(fe->dvb->device,
 279                         "%s: initialising adapter %i frontend %i (%s)...\n",
 280                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 281
 282         if (fe->ops.init)
 283                 fe->ops.init(fe);
 284         if (fe->ops.tuner_ops.init) {
 285                 if (fe->ops.i2c_gate_ctrl)
 286                         fe->ops.i2c_gate_ctrl(fe, 1);
 287                 fe->ops.tuner_ops.init(fe);
 288                 if (fe->ops.i2c_gate_ctrl)
 289                         fe->ops.i2c_gate_ctrl(fe, 0);
 290         }
 291 }
 292
 293 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 294 {
 295         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 296
 297         fepriv->reinitialise = 1;
 298         dvb_frontend_wakeup(fe);
 299 }
 300 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 301
 302 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 303 {
 304         int q2;
 305         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 306
 307         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 308
 309         if (locked)
 310                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 311         else
 312                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 313
 314         q2 = fepriv->quality - 128;
 315         q2 *= q2;
 316
 317         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 318 }
 319
 320 /**
 321  * Performs automatic twiddling of frontend parameters.
 322  *
 323  * @param fe The frontend concerned.
 324  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 325  * @returns Number of complete iterations that have been performed.
 326  */
 327 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 328 {
 329         int autoinversion;
 330         int ready = 0;
 331         int fe_set_err = 0;
 332         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 333         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 334         int original_inversion = c->inversion;
 335         u32 original_frequency = c->frequency;
 336
 337         /* are we using autoinversion? */
 338         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 339                          (c->inversion == INVERSION_AUTO));
 340
 341         /* setup parameters correctly */
 342         while(!ready) {
 343                 /* calculate the lnb_drift */
 344                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 345
 346                 /* wrap the auto_step if we've exceeded the maximum drift */
 347                 if (fepriv->lnb_drift > fepriv->max_drift) {
 348                         fepriv->auto_step = 0;
 349                         fepriv->auto_sub_step = 0;
 350                         fepriv->lnb_drift = 0;
 351                 }
 352
 353                 /* perform inversion and +/- zigzag */
 354                 switch(fepriv->auto_sub_step) {
 355                 case 0:
 356                         /* try with the current inversion and current drift setting */
 357                         ready = 1;
 358                         break;
 359
 360                 case 1:
 361                         if (!autoinversion) break;
 362
 363                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 364                         ready = 1;
 365                         break;
 366
 367                 case 2:
 368                         if (fepriv->lnb_drift == 0) break;
 369
 370                         fepriv->lnb_drift = -fepriv->lnb_drift;
 371                         ready = 1;
 372                         break;
 373
 374                 case 3:
 375                         if (fepriv->lnb_drift == 0) break;
 376                         if (!autoinversion) break;
 377
 378                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 379                         fepriv->lnb_drift = -fepriv->lnb_drift;
 380                         ready = 1;
 381                         break;
 382
 383                 default:
 384                         fepriv->auto_step++;
 385                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 386                         break;
 387                 }
 388
 389                 if (!ready) fepriv->auto_sub_step++;
 390         }
 391
 392         /* if this attempt would hit where we started, indicate a complete
 393          * iteration has occurred */
 394         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 395             (fepriv->auto_sub_step == 0) && check_wrapped) {
 396                 return 1;
 397         }
 398
 399         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 400                         "auto_sub_step:%i started_auto_step:%i\n",
 401                         __func__, fepriv->lnb_drift, fepriv->inversion,
 402                         fepriv->auto_step, fepriv->auto_sub_step,
 403                         fepriv->started_auto_step);
 404
 405         /* set the frontend itself */
 406         c->frequency += fepriv->lnb_drift;
 407         if (autoinversion)
 408                 c->inversion = fepriv->inversion;
 409         tmp = *c;
 410         if (fe->ops.set_frontend)
 411                 fe_set_err = fe->ops.set_frontend(fe);
 412         *c = tmp;
 413         if (fe_set_err < 0) {
 414                 fepriv->state = FESTATE_ERROR;
 415                 return fe_set_err;
 416         }
 417
 418         c->frequency = original_frequency;
 419         c->inversion = original_inversion;
 420
 421         fepriv->auto_sub_step++;
 422         return 0;
 423 }
 424
 425 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 426 {
 427         fe_status_t s = 0;
 428         int retval = 0;
 429         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 430         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 431
 432         /* if we've got no parameters, just keep idling */
 433         if (fepriv->state & FESTATE_IDLE) {
 434                 fepriv->delay = 3*HZ;
 435                 fepriv->quality = 0;
 436                 return;
 437         }
 438
 439         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 440         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 441                 if (fepriv->state & FESTATE_RETUNE) {
 442                         tmp = *c;
 443                         if (fe->ops.set_frontend)
 444                                 retval = fe->ops.set_frontend(fe);
 445                         *c = tmp;
 446                         if (retval < 0)
 447                                 fepriv->state = FESTATE_ERROR;
 448                         else
 449                                 fepriv->state = FESTATE_TUNED;
 450                 }
 451                 fepriv->delay = 3*HZ;
 452                 fepriv->quality = 0;
 453                 return;
 454         }
 455
 456         /* get the frontend status */
 457         if (fepriv->state & FESTATE_RETUNE) {
 458                 s = 0;
 459         } else {
 460                 if (fe->ops.read_status)
 461                         fe->ops.read_status(fe, &s);
 462                 if (s != fepriv->status) {
 463                         dvb_frontend_add_event(fe, s);
 464                         fepriv->status = s;
 465                 }
 466         }
 467
 468         /* if we're not tuned, and we have a lock, move to the TUNED state */
 469         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 470                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 471                 fepriv->state = FESTATE_TUNED;
 472
 473                 /* if we're tuned, then we have determined the correct inversion */
 474                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 475                     (c->inversion == INVERSION_AUTO)) {
 476                         c->inversion = fepriv->inversion;
 477                 }
 478                 return;
 479         }
 480
 481         /* if we are tuned already, check we're still locked */
 482         if (fepriv->state & FESTATE_TUNED) {
 483                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 484
 485                 /* we're tuned, and the lock is still good... */
 486                 if (s & FE_HAS_LOCK) {
 487                         return;
 488                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 489                         fepriv->state = FESTATE_ZIGZAG_FAST;
 490                         fepriv->started_auto_step = fepriv->auto_step;
 491                         fepriv->check_wrapped = 0;
 492                 }
 493         }
 494
 495         /* don't actually do anything if we're in the LOSTLOCK state,
 496          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 497         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 498             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 499                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 500                 return;
 501         }
 502
 503         /* don't do anything if we're in the DISEQC state, since this
 504          * might be someone with a motorized dish controlled by DISEQC.
 505          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 506         if (fepriv->state & FESTATE_DISEQC) {
 507                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 508                 return;
 509         }
 510
 511         /* if we're in the RETUNE state, set everything up for a brand
 512          * new scan, keeping the current inversion setting, as the next
 513          * tune is _very_ likely to require the same */
 514         if (fepriv->state & FESTATE_RETUNE) {
 515                 fepriv->lnb_drift = 0;
 516                 fepriv->auto_step = 0;
 517                 fepriv->auto_sub_step = 0;
 518                 fepriv->started_auto_step = 0;
 519                 fepriv->check_wrapped = 0;
 520         }
 521
 522         /* fast zigzag. */
 523         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 524                 fepriv->delay = fepriv->min_delay;
 525
 526                 /* perform a tune */
 527                 retval = dvb_frontend_swzigzag_autotune(fe,
 528                                                         fepriv->check_wrapped);
 529                 if (retval < 0) {
 530                         return;
 531                 } else if (retval) {
 532                         /* OK, if we've run out of trials at the fast speed.
 533                          * Drop back to slow for the _next_ attempt */
 534                         fepriv->state = FESTATE_SEARCHING_SLOW;
 535                         fepriv->started_auto_step = fepriv->auto_step;
 536                         return;
 537                 }
 538                 fepriv->check_wrapped = 1;
 539
 540                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 541                  * This ensures we cannot return from an
 542                  * FE_SET_FRONTEND ioctl before the first frontend tune
 543                  * occurs */
 544                 if (fepriv->state & FESTATE_RETUNE) {
 545                         fepriv->state = FESTATE_TUNING_FAST;
 546                 }
 547         }
 548
 549         /* slow zigzag */
 550         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 551                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 552
 553                 /* Note: don't bother checking for wrapping; we stay in this
 554                  * state until we get a lock */
 555                 dvb_frontend_swzigzag_autotune(fe, 0);
 556         }
 557 }
 558
 559 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 560 {
 561         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 562
 563         if (fe->exit != DVB_FE_NO_EXIT)
 564                 return 1;
 565
 566         if (fepriv->dvbdev->writers == 1)
 567                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 568                                   dvb_shutdown_timeout * HZ))
 569                         return 1;
 570
 571         return 0;
 572 }
 573
 574 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 575 {
 576         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 577
 578         if (fepriv->wakeup) {
 579                 fepriv->wakeup = 0;
 580                 return 1;
 581         }
 582         return dvb_frontend_is_exiting(fe);
 583 }
 584
 585 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 586 {
 587         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 588
 589         fepriv->wakeup = 1;
 590         wake_up_interruptible(&fepriv->wait_queue);
 591 }
 592
 593 static int dvb_frontend_thread(void *data)
 594 {
 595         struct dvb_frontend *fe = data;
 596         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 597         fe_status_t s;
 598         enum dvbfe_algo algo;
 599
 600         bool re_tune = false;
 601         bool semheld = false;
 602
 603         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 604
 605         fepriv->check_wrapped = 0;
 606         fepriv->quality = 0;
 607         fepriv->delay = 3*HZ;
 608         fepriv->status = 0;
 609         fepriv->wakeup = 0;
 610         fepriv->reinitialise = 0;
 611
 612         dvb_frontend_init(fe);
 613
 614         set_freezable();
 615         while (1) {
 616                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 617 restart:
 618                 wait_event_interruptible_timeout(fepriv->wait_queue,
 619                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 620                                 || freezing(current),
 621                         fepriv->delay);
 622
 623                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 624                         /* got signal or quitting */
 625                         if (!down_interruptible(&fepriv->sem))
 626                                 semheld = true;
 627                         fe->exit = DVB_FE_NORMAL_EXIT;
 628                         break;
 629                 }
 630
 631                 if (try_to_freeze())
 632                         goto restart;
 633
 634                 if (down_interruptible(&fepriv->sem))
 635                         break;
 636
 637                 if (fepriv->reinitialise) {
 638                         dvb_frontend_init(fe);
 639                         if (fe->ops.set_tone && fepriv->tone != -1)
 640                                 fe->ops.set_tone(fe, fepriv->tone);
 641                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 642                                 fe->ops.set_voltage(fe, fepriv->voltage);
 643                         fepriv->reinitialise = 0;
 644                 }
 645
 646                 /* do an iteration of the tuning loop */
 647                 if (fe->ops.get_frontend_algo) {
 648                         algo = fe->ops.get_frontend_algo(fe);
 649                         switch (algo) {
 650                         case DVBFE_ALGO_HW:
 651                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 652
 653                                 if (fepriv->state & FESTATE_RETUNE) {
 654                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 655                                         re_tune = true;
 656                                         fepriv->state = FESTATE_TUNED;
 657                                 } else {
 658                                         re_tune = false;
 659                                 }
 660
 661                                 if (fe->ops.tune)
 662                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 663
 664                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 665                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 666                                         dvb_frontend_add_event(fe, s);
 667                                         fepriv->status = s;
 668                                 }
 669                                 break;
 670                         case DVBFE_ALGO_SW:
 671                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 672                                 dvb_frontend_swzigzag(fe);
 673                                 break;
 674                         case DVBFE_ALGO_CUSTOM:
 675                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 676                                 if (fepriv->state & FESTATE_RETUNE) {
 677                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 678                                         fepriv->state = FESTATE_TUNED;
 679                                 }
 680                                 /* Case where we are going to search for a carrier
 681                                  * User asked us to retune again for some reason, possibly
 682                                  * requesting a search with a new set of parameters
 683                                  */
 684                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 685                                         if (fe->ops.search) {
 686                                                 fepriv->algo_status = fe->ops.search(fe);
 687                                                 /* We did do a search as was requested, the flags are
 688                                                  * now unset as well and has the flags wrt to search.
 689                                                  */
 690                                         } else {
 691                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 692                                         }
 693                                 }
 694                                 /* Track the carrier if the search was successful */
 695                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 696                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 697                                         fepriv->delay = HZ / 2;
 698                                 }
 699                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
 700                                 fe->ops.read_status(fe, &s);
 701                                 if (s != fepriv->status) {
 702                                         dvb_frontend_add_event(fe, s); /* update event list */
 703                                         fepriv->status = s;
 704                                         if (!(s & FE_HAS_LOCK)) {
 705                                                 fepriv->delay = HZ / 10;
 706                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 707                                         } else {
 708                                                 fepriv->delay = 60 * HZ;
 709                                         }
 710                                 }
 711                                 break;
 712                         default:
 713                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 714                                 break;
 715                         }
 716                 } else {
 717                         dvb_frontend_swzigzag(fe);
 718                 }
 719         }
 720
 721         if (dvb_powerdown_on_sleep) {
 722                 if (fe->ops.set_voltage)
 723                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 724                 if (fe->ops.tuner_ops.sleep) {
 725                         if (fe->ops.i2c_gate_ctrl)
 726                                 fe->ops.i2c_gate_ctrl(fe, 1);
 727                         fe->ops.tuner_ops.sleep(fe);
 728                         if (fe->ops.i2c_gate_ctrl)
 729                                 fe->ops.i2c_gate_ctrl(fe, 0);
 730                 }
 731                 if (fe->ops.sleep)
 732                         fe->ops.sleep(fe);
 733         }
 734
 735         fepriv->thread = NULL;
 736         if (kthread_should_stop())
 737                 fe->exit = DVB_FE_DEVICE_REMOVED;
 738         else
 739                 fe->exit = DVB_FE_NO_EXIT;
 740         mb();
 741
 742         if (semheld)
 743                 up(&fepriv->sem);
 744         dvb_frontend_wakeup(fe);
 745         return 0;
 746 }
 747
 748 static void dvb_frontend_stop(struct dvb_frontend *fe)
 749 {
 750         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 751
 752         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 753
 754         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 755                 fe->exit = DVB_FE_NORMAL_EXIT;
 756         mb();
 757
 758         if (!fepriv->thread)
 759                 return;
 760
 761         kthread_stop(fepriv->thread);
 762
 763         sema_init(&fepriv->sem, 1);
 764         fepriv->state = FESTATE_IDLE;
 765
 766         /* paranoia check in case a signal arrived */
 767         if (fepriv->thread)
 768                 dev_warn(fe->dvb->device,
 769                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 770                                 fepriv->thread);
 771 }
 772
 773 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 774 {
 775         return ((curtime.tv_usec < lasttime.tv_usec) ?
 776                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 777                 curtime.tv_usec - lasttime.tv_usec);
 778 }
 779 EXPORT_SYMBOL(timeval_usec_diff);
 780
 781 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 782 {
 783         curtime->tv_usec += add_usec;
 784         if (curtime->tv_usec >= 1000000) {
 785                 curtime->tv_usec -= 1000000;
 786                 curtime->tv_sec++;
 787         }
 788 }
 789
 790 /*
 791  * Sleep until gettimeofday() > waketime + add_usec
 792  * This needs to be as precise as possible, but as the delay is
 793  * usually between 2ms and 32ms, it is done using a scheduled msleep
 794  * followed by usleep (normally a busy-wait loop) for the remainder
 795  */
 796 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 797 {
 798         struct timeval lasttime;
 799         s32 delta, newdelta;
 800
 801         timeval_usec_add(waketime, add_usec);
 802
 803         do_gettimeofday(&lasttime);
 804         delta = timeval_usec_diff(lasttime, *waketime);
 805         if (delta > 2500) {
 806                 msleep((delta - 1500) / 1000);
 807                 do_gettimeofday(&lasttime);
 808                 newdelta = timeval_usec_diff(lasttime, *waketime);
 809                 delta = (newdelta > delta) ? 0 : newdelta;
 810         }
 811         if (delta > 0)
 812                 udelay(delta);
 813 }
 814 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 815
 816 static int dvb_frontend_start(struct dvb_frontend *fe)
 817 {
 818         int ret;
 819         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 820         struct task_struct *fe_thread;
 821
 822         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 823
 824         if (fepriv->thread) {
 825                 if (fe->exit == DVB_FE_NO_EXIT)
 826                         return 0;
 827                 else
 828                         dvb_frontend_stop (fe);
 829         }
 830
 831         if (signal_pending(current))
 832                 return -EINTR;
 833         if (down_interruptible (&fepriv->sem))
 834                 return -EINTR;
 835
 836         fepriv->state = FESTATE_IDLE;
 837         fe->exit = DVB_FE_NO_EXIT;
 838         fepriv->thread = NULL;
 839         mb();
 840
 841         fe_thread = kthread_run(dvb_frontend_thread, fe,
 842                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 843         if (IS_ERR(fe_thread)) {
 844                 ret = PTR_ERR(fe_thread);
 845                 dev_warn(fe->dvb->device,
 846                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 847                                 ret);
 848                 up(&fepriv->sem);
 849                 return ret;
 850         }
 851         fepriv->thread = fe_thread;
 852         return 0;
 853 }
 854
 855 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 856                                         u32 *freq_min, u32 *freq_max)
 857 {
 858         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 859
 860         if (fe->ops.info.frequency_max == 0)
 861                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 862         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 863                 *freq_max = fe->ops.info.frequency_max;
 864         else
 865                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 866
 867         if (*freq_min == 0 || *freq_max == 0)
 868                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 869                                 fe->dvb->num, fe->id);
 870 }
 871
 872 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 873 {
 874         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 875         u32 freq_min;
 876         u32 freq_max;
 877
 878         /* range check: frequency */
 879         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 880         if ((freq_min && c->frequency < freq_min) ||
 881             (freq_max && c->frequency > freq_max)) {
 882                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 883                                 fe->dvb->num, fe->id, c->frequency,
 884                                 freq_min, freq_max);
 885                 return -EINVAL;
 886         }
 887
 888         /* range check: symbol rate */
 889         switch (c->delivery_system) {
 890         case SYS_DVBS:
 891         case SYS_DVBS2:
 892         case SYS_TURBO:
 893         case SYS_DVBC_ANNEX_A:
 894         case SYS_DVBC_ANNEX_C:
 895                 if ((fe->ops.info.symbol_rate_min &&
 896                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 897                     (fe->ops.info.symbol_rate_max &&
 898                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 899                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 900                                         fe->dvb->num, fe->id, c->symbol_rate,
 901                                         fe->ops.info.symbol_rate_min,
 902                                         fe->ops.info.symbol_rate_max);
 903                         return -EINVAL;
 904                 }
 905         default:
 906                 break;
 907         }
 908
 909         return 0;
 910 }
 911
 912 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 913 {
 914         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 915         int i;
 916         u32 delsys;
 917
 918         delsys = c->delivery_system;
 919         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
 920         c->delivery_system = delsys;
 921
 922         c->state = DTV_CLEAR;
 923
 924         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
 925                         __func__, c->delivery_system);
 926
 927         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 928         c->bandwidth_hz = 0;    /* AUTO */
 929         c->guard_interval = GUARD_INTERVAL_AUTO;
 930         c->hierarchy = HIERARCHY_AUTO;
 931         c->symbol_rate = 0;
 932         c->code_rate_HP = FEC_AUTO;
 933         c->code_rate_LP = FEC_AUTO;
 934         c->fec_inner = FEC_AUTO;
 935         c->rolloff = ROLLOFF_AUTO;
 936         c->voltage = SEC_VOLTAGE_OFF;
 937         c->sectone = SEC_TONE_OFF;
 938         c->pilot = PILOT_AUTO;
 939
 940         c->isdbt_partial_reception = 0;
 941         c->isdbt_sb_mode = 0;
 942         c->isdbt_sb_subchannel = 0;
 943         c->isdbt_sb_segment_idx = 0;
 944         c->isdbt_sb_segment_count = 0;
 945         c->isdbt_layer_enabled = 0;
 946         for (i = 0; i < 3; i++) {
 947                 c->layer[i].fec = FEC_AUTO;
 948                 c->layer[i].modulation = QAM_AUTO;
 949                 c->layer[i].interleaving = 0;
 950                 c->layer[i].segment_count = 0;
 951         }
 952
 953         c->stream_id = NO_STREAM_ID_FILTER;
 954
 955         switch (c->delivery_system) {
 956         case SYS_DVBS:
 957         case SYS_DVBS2:
 958         case SYS_TURBO:
 959                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 960                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 961                 break;
 962         case SYS_ATSC:
 963                 c->modulation = VSB_8;
 964                 break;
 965         case SYS_ISDBS:
 966                 c->symbol_rate = 28860000;
 967                 c->rolloff = ROLLOFF_35;
 968                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
 969                 break;
 970         default:
 971                 c->modulation = QAM_AUTO;
 972                 break;
 973         }
 974
 975         c->lna = LNA_AUTO;
 976
 977         return 0;
 978 }
 979
 980 #define _DTV_CMD(n, s, b) \
 981 [n] = { \
 982         .name = #n, \
 983         .cmd  = n, \
 984         .set  = s,\
 985         .buffer = b \
 986 }
 987
 988 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 989         _DTV_CMD(DTV_TUNE, 1, 0),
 990         _DTV_CMD(DTV_CLEAR, 1, 0),
 991
 992         /* Set */
 993         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 994         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 995         _DTV_CMD(DTV_MODULATION, 1, 0),
 996         _DTV_CMD(DTV_INVERSION, 1, 0),
 997         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 998         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 999         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1000         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1001         _DTV_CMD(DTV_TONE, 1, 0),
1002         _DTV_CMD(DTV_PILOT, 1, 0),
1003         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1004         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1005         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1006         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1007         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1008         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1009         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1010         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1011
1012         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1013         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1014         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1015         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1016         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1017         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1018         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1019         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1020         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1021         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1022         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1023         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1024         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1025         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1026         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1027         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1028         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1029         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1030
1031         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1032         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1033         _DTV_CMD(DTV_LNA, 1, 0),
1034
1035         /* Get */
1036         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1037         _DTV_CMD(DTV_API_VERSION, 0, 0),
1038
1039         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1040
1041         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1042         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1043
1044         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1045         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1046         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1047         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1048         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1049         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1050         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1051         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1052         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1053         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1054         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1055         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1056         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1057
1058         /* Statistics API */
1059         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1060         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1061         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1062         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1063         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1064         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1065         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1066         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1067 };
1068
1069 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1070 {
1071         int i;
1072
1073         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1074                 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1075                                 __func__, tvp->cmd);
1076                 return;
1077         }
1078
1079         dev_dbg(fe->dvb->device, "%s: tvp.cmd    = 0x%08x (%s)\n", __func__,
1080                         tvp->cmd, dtv_cmds[tvp->cmd].name);
1081
1082         if (dtv_cmds[tvp->cmd].buffer) {
1083                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1084                         __func__, tvp->u.buffer.len);
1085
1086                 for(i = 0; i < tvp->u.buffer.len; i++)
1087                         dev_dbg(fe->dvb->device,
1088                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1089                                         __func__, i, tvp->u.buffer.data[i]);
1090         } else {
1091                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1092                                 tvp->u.data);
1093         }
1094 }
1095
1096 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1097  * drivers can use a single set_frontend tuning function, regardless of whether
1098  * it's being used for the legacy or new API, reducing code and complexity.
1099  */
1100 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1101                                    struct dtv_frontend_properties *c,
1102                                    const struct dvb_frontend_parameters *p)
1103 {
1104         c->frequency = p->frequency;
1105         c->inversion = p->inversion;
1106
1107         switch (dvbv3_type(c->delivery_system)) {
1108         case DVBV3_QPSK:
1109                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1110                 c->symbol_rate = p->u.qpsk.symbol_rate;
1111                 c->fec_inner = p->u.qpsk.fec_inner;
1112                 break;
1113         case DVBV3_QAM:
1114                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1115                 c->symbol_rate = p->u.qam.symbol_rate;
1116                 c->fec_inner = p->u.qam.fec_inner;
1117                 c->modulation = p->u.qam.modulation;
1118                 break;
1119         case DVBV3_OFDM:
1120                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1121
1122                 switch (p->u.ofdm.bandwidth) {
1123                 case BANDWIDTH_10_MHZ:
1124                         c->bandwidth_hz = 10000000;
1125                         break;
1126                 case BANDWIDTH_8_MHZ:
1127                         c->bandwidth_hz = 8000000;
1128                         break;
1129                 case BANDWIDTH_7_MHZ:
1130                         c->bandwidth_hz = 7000000;
1131                         break;
1132                 case BANDWIDTH_6_MHZ:
1133                         c->bandwidth_hz = 6000000;
1134                         break;
1135                 case BANDWIDTH_5_MHZ:
1136                         c->bandwidth_hz = 5000000;
1137                         break;
1138                 case BANDWIDTH_1_712_MHZ:
1139                         c->bandwidth_hz = 1712000;
1140                         break;
1141                 case BANDWIDTH_AUTO:
1142                         c->bandwidth_hz = 0;
1143                 }
1144
1145                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1146                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1147                 c->modulation = p->u.ofdm.constellation;
1148                 c->transmission_mode = p->u.ofdm.transmission_mode;
1149                 c->guard_interval = p->u.ofdm.guard_interval;
1150                 c->hierarchy = p->u.ofdm.hierarchy_information;
1151                 break;
1152         case DVBV3_ATSC:
1153                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1154                 c->modulation = p->u.vsb.modulation;
1155                 if (c->delivery_system == SYS_ATSCMH)
1156                         break;
1157                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1158                         c->delivery_system = SYS_ATSC;
1159                 else
1160                         c->delivery_system = SYS_DVBC_ANNEX_B;
1161                 break;
1162         case DVBV3_UNKNOWN:
1163                 dev_err(fe->dvb->device,
1164                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1165                                 __func__, c->delivery_system);
1166                 return -EINVAL;
1167         }
1168
1169         return 0;
1170 }
1171
1172 /* Ensure the cached values are set correctly in the frontend
1173  * legacy tuning structures, for the advanced tuning API.
1174  */
1175 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1176                                             struct dvb_frontend_parameters *p)
1177 {
1178         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1179
1180         p->frequency = c->frequency;
1181         p->inversion = c->inversion;
1182
1183         switch (dvbv3_type(c->delivery_system)) {
1184         case DVBV3_UNKNOWN:
1185                 dev_err(fe->dvb->device,
1186                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1187                                 __func__, c->delivery_system);
1188                 return -EINVAL;
1189         case DVBV3_QPSK:
1190                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1191                 p->u.qpsk.symbol_rate = c->symbol_rate;
1192                 p->u.qpsk.fec_inner = c->fec_inner;
1193                 break;
1194         case DVBV3_QAM:
1195                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1196                 p->u.qam.symbol_rate = c->symbol_rate;
1197                 p->u.qam.fec_inner = c->fec_inner;
1198                 p->u.qam.modulation = c->modulation;
1199                 break;
1200         case DVBV3_OFDM:
1201                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1202                 switch (c->bandwidth_hz) {
1203                 case 10000000:
1204                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1205                         break;
1206                 case 8000000:
1207                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1208                         break;
1209                 case 7000000:
1210                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1211                         break;
1212                 case 6000000:
1213                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1214                         break;
1215                 case 5000000:
1216                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1217                         break;
1218                 case 1712000:
1219                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1220                         break;
1221                 case 0:
1222                 default:
1223                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1224                 }
1225                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1226                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1227                 p->u.ofdm.constellation = c->modulation;
1228                 p->u.ofdm.transmission_mode = c->transmission_mode;
1229                 p->u.ofdm.guard_interval = c->guard_interval;
1230                 p->u.ofdm.hierarchy_information = c->hierarchy;
1231                 break;
1232         case DVBV3_ATSC:
1233                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1234                 p->u.vsb.modulation = c->modulation;
1235                 break;
1236         }
1237         return 0;
1238 }
1239
1240 /**
1241  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1242  * @fe:         struct dvb_frontend pointer
1243  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1244  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1245  *
1246  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1247  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1248  * If p_out is not null, it will update the DVBv3 params pointed by it.
1249  */
1250 static int dtv_get_frontend(struct dvb_frontend *fe,
1251                             struct dvb_frontend_parameters *p_out)
1252 {
1253         int r;
1254
1255         if (fe->ops.get_frontend) {
1256                 r = fe->ops.get_frontend(fe);
1257                 if (unlikely(r < 0))
1258                         return r;
1259                 if (p_out)
1260                         dtv_property_legacy_params_sync(fe, p_out);
1261                 return 0;
1262         }
1263
1264         /* As everything is in cache, get_frontend fops are always supported */
1265         return 0;
1266 }
1267
1268 static int dvb_frontend_ioctl_legacy(struct file *file,
1269                         unsigned int cmd, void *parg);
1270 static int dvb_frontend_ioctl_properties(struct file *file,
1271                         unsigned int cmd, void *parg);
1272
1273 static int dtv_property_process_get(struct dvb_frontend *fe,
1274                                     const struct dtv_frontend_properties *c,
1275                                     struct dtv_property *tvp,
1276                                     struct file *file)
1277 {
1278         int r, ncaps;
1279
1280         switch(tvp->cmd) {
1281         case DTV_ENUM_DELSYS:
1282                 ncaps = 0;
1283                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1284                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1285                         ncaps++;
1286                 }
1287                 tvp->u.buffer.len = ncaps;
1288                 break;
1289         case DTV_FREQUENCY:
1290                 tvp->u.data = c->frequency;
1291                 break;
1292         case DTV_MODULATION:
1293                 tvp->u.data = c->modulation;
1294                 break;
1295         case DTV_BANDWIDTH_HZ:
1296                 tvp->u.data = c->bandwidth_hz;
1297                 break;
1298         case DTV_INVERSION:
1299                 tvp->u.data = c->inversion;
1300                 break;
1301         case DTV_SYMBOL_RATE:
1302                 tvp->u.data = c->symbol_rate;
1303                 break;
1304         case DTV_INNER_FEC:
1305                 tvp->u.data = c->fec_inner;
1306                 break;
1307         case DTV_PILOT:
1308                 tvp->u.data = c->pilot;
1309                 break;
1310         case DTV_ROLLOFF:
1311                 tvp->u.data = c->rolloff;
1312                 break;
1313         case DTV_DELIVERY_SYSTEM:
1314                 tvp->u.data = c->delivery_system;
1315                 break;
1316         case DTV_VOLTAGE:
1317                 tvp->u.data = c->voltage;
1318                 break;
1319         case DTV_TONE:
1320                 tvp->u.data = c->sectone;
1321                 break;
1322         case DTV_API_VERSION:
1323                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1324                 break;
1325         case DTV_CODE_RATE_HP:
1326                 tvp->u.data = c->code_rate_HP;
1327                 break;
1328         case DTV_CODE_RATE_LP:
1329                 tvp->u.data = c->code_rate_LP;
1330                 break;
1331         case DTV_GUARD_INTERVAL:
1332                 tvp->u.data = c->guard_interval;
1333                 break;
1334         case DTV_TRANSMISSION_MODE:
1335                 tvp->u.data = c->transmission_mode;
1336                 break;
1337         case DTV_HIERARCHY:
1338                 tvp->u.data = c->hierarchy;
1339                 break;
1340         case DTV_INTERLEAVING:
1341                 tvp->u.data = c->interleaving;
1342                 break;
1343
1344         /* ISDB-T Support here */
1345         case DTV_ISDBT_PARTIAL_RECEPTION:
1346                 tvp->u.data = c->isdbt_partial_reception;
1347                 break;
1348         case DTV_ISDBT_SOUND_BROADCASTING:
1349                 tvp->u.data = c->isdbt_sb_mode;
1350                 break;
1351         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1352                 tvp->u.data = c->isdbt_sb_subchannel;
1353                 break;
1354         case DTV_ISDBT_SB_SEGMENT_IDX:
1355                 tvp->u.data = c->isdbt_sb_segment_idx;
1356                 break;
1357         case DTV_ISDBT_SB_SEGMENT_COUNT:
1358                 tvp->u.data = c->isdbt_sb_segment_count;
1359                 break;
1360         case DTV_ISDBT_LAYER_ENABLED:
1361                 tvp->u.data = c->isdbt_layer_enabled;
1362                 break;
1363         case DTV_ISDBT_LAYERA_FEC:
1364                 tvp->u.data = c->layer[0].fec;
1365                 break;
1366         case DTV_ISDBT_LAYERA_MODULATION:
1367                 tvp->u.data = c->layer[0].modulation;
1368                 break;
1369         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1370                 tvp->u.data = c->layer[0].segment_count;
1371                 break;
1372         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1373                 tvp->u.data = c->layer[0].interleaving;
1374                 break;
1375         case DTV_ISDBT_LAYERB_FEC:
1376                 tvp->u.data = c->layer[1].fec;
1377                 break;
1378         case DTV_ISDBT_LAYERB_MODULATION:
1379                 tvp->u.data = c->layer[1].modulation;
1380                 break;
1381         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1382                 tvp->u.data = c->layer[1].segment_count;
1383                 break;
1384         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1385                 tvp->u.data = c->layer[1].interleaving;
1386                 break;
1387         case DTV_ISDBT_LAYERC_FEC:
1388                 tvp->u.data = c->layer[2].fec;
1389                 break;
1390         case DTV_ISDBT_LAYERC_MODULATION:
1391                 tvp->u.data = c->layer[2].modulation;
1392                 break;
1393         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1394                 tvp->u.data = c->layer[2].segment_count;
1395                 break;
1396         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1397                 tvp->u.data = c->layer[2].interleaving;
1398                 break;
1399
1400         /* Multistream support */
1401         case DTV_STREAM_ID:
1402         case DTV_DVBT2_PLP_ID_LEGACY:
1403                 tvp->u.data = c->stream_id;
1404                 break;
1405
1406         /* ATSC-MH */
1407         case DTV_ATSCMH_FIC_VER:
1408                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1409                 break;
1410         case DTV_ATSCMH_PARADE_ID:
1411                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1412                 break;
1413         case DTV_ATSCMH_NOG:
1414                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1415                 break;
1416         case DTV_ATSCMH_TNOG:
1417                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1418                 break;
1419         case DTV_ATSCMH_SGN:
1420                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1421                 break;
1422         case DTV_ATSCMH_PRC:
1423                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1424                 break;
1425         case DTV_ATSCMH_RS_FRAME_MODE:
1426                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1427                 break;
1428         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1429                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1430                 break;
1431         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1432                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1433                 break;
1434         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1435                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1436                 break;
1437         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1438                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1439                 break;
1440         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1441                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1442                 break;
1443         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1444                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1445                 break;
1446         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1447                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1448                 break;
1449         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1450                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1451                 break;
1452
1453         case DTV_LNA:
1454                 tvp->u.data = c->lna;
1455                 break;
1456
1457         /* Fill quality measures */
1458         case DTV_STAT_SIGNAL_STRENGTH:
1459                 tvp->u.st = c->strength;
1460                 break;
1461         case DTV_STAT_CNR:
1462                 tvp->u.st = c->cnr;
1463                 break;
1464         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1465                 tvp->u.st = c->pre_bit_error;
1466                 break;
1467         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1468                 tvp->u.st = c->pre_bit_count;
1469                 break;
1470         case DTV_STAT_POST_ERROR_BIT_COUNT:
1471                 tvp->u.st = c->post_bit_error;
1472                 break;
1473         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1474                 tvp->u.st = c->post_bit_count;
1475                 break;
1476         case DTV_STAT_ERROR_BLOCK_COUNT:
1477                 tvp->u.st = c->block_error;
1478                 break;
1479         case DTV_STAT_TOTAL_BLOCK_COUNT:
1480                 tvp->u.st = c->block_count;
1481                 break;
1482         default:
1483                 dev_dbg(fe->dvb->device,
1484                         "%s: FE property %d doesn't exist\n",
1485                         __func__, tvp->cmd);
1486                 return -EINVAL;
1487         }
1488
1489         /* Allow the frontend to override outgoing properties */
1490         if (fe->ops.get_property) {
1491                 r = fe->ops.get_property(fe, tvp);
1492                 if (r < 0)
1493                         return r;
1494         }
1495
1496         dtv_property_dump(fe, tvp);
1497
1498         return 0;
1499 }
1500
1501 static int dtv_set_frontend(struct dvb_frontend *fe);
1502
1503 static bool is_dvbv3_delsys(u32 delsys)
1504 {
1505         bool status;
1506
1507         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1508                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1509
1510         return status;
1511 }
1512
1513 /**
1514  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1515  * @fe:                 struct frontend;
1516  * @delsys:                     DVBv5 type that will be used for emulation
1517  *
1518  * Provides emulation for delivery systems that are compatible with the old
1519  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1520  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1521  * parameters are compatible with DVB-S spec.
1522  */
1523 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1524 {
1525         int i;
1526         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1527
1528         c->delivery_system = delsys;
1529
1530         /*
1531          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1532          */
1533         if (c->delivery_system == SYS_ISDBT) {
1534                 dev_dbg(fe->dvb->device,
1535                         "%s: Using defaults for SYS_ISDBT\n",
1536                         __func__);
1537
1538                 if (!c->bandwidth_hz)
1539                         c->bandwidth_hz = 6000000;
1540
1541                 c->isdbt_partial_reception = 0;
1542                 c->isdbt_sb_mode = 0;
1543                 c->isdbt_sb_subchannel = 0;
1544                 c->isdbt_sb_segment_idx = 0;
1545                 c->isdbt_sb_segment_count = 0;
1546                 c->isdbt_layer_enabled = 7;
1547                 for (i = 0; i < 3; i++) {
1548                         c->layer[i].fec = FEC_AUTO;
1549                         c->layer[i].modulation = QAM_AUTO;
1550                         c->layer[i].interleaving = 0;
1551                         c->layer[i].segment_count = 0;
1552                 }
1553         }
1554         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1555                 __func__, c->delivery_system);
1556
1557         return 0;
1558 }
1559
1560 /**
1561  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1562  * @fe:                 frontend struct
1563  * @desired_system:     delivery system requested by the user
1564  *
1565  * A DVBv5 call know what's the desired system it wants. So, set it.
1566  *
1567  * There are, however, a few known issues with early DVBv5 applications that
1568  * are also handled by this logic:
1569  *
1570  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1571  *    This is an API violation, but, as we don't want to break userspace,
1572  *    convert it to the first supported delivery system.
1573  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1574  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1575  *    ISDB-T provided backward compat with DVB-T.
1576  */
1577 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1578                                      u32 desired_system)
1579 {
1580         int ncaps;
1581         u32 delsys = SYS_UNDEFINED;
1582         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1583         enum dvbv3_emulation_type type;
1584
1585         /*
1586          * It was reported that some old DVBv5 applications were
1587          * filling delivery_system with SYS_UNDEFINED. If this happens,
1588          * assume that the application wants to use the first supported
1589          * delivery system.
1590          */
1591         if (desired_system == SYS_UNDEFINED)
1592                 desired_system = fe->ops.delsys[0];
1593
1594         /*
1595          * This is a DVBv5 call. So, it likely knows the supported
1596          * delivery systems. So, check if the desired delivery system is
1597          * supported
1598          */
1599         ncaps = 0;
1600         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1601                 if (fe->ops.delsys[ncaps] == desired_system) {
1602                         c->delivery_system = desired_system;
1603                         dev_dbg(fe->dvb->device,
1604                                         "%s: Changing delivery system to %d\n",
1605                                         __func__, desired_system);
1606                         return 0;
1607                 }
1608                 ncaps++;
1609         }
1610
1611         /*
1612          * The requested delivery system isn't supported. Maybe userspace
1613          * is requesting a DVBv3 compatible delivery system.
1614          *
1615          * The emulation only works if the desired system is one of the
1616          * delivery systems supported by DVBv3 API
1617          */
1618         if (!is_dvbv3_delsys(desired_system)) {
1619                 dev_dbg(fe->dvb->device,
1620                         "%s: Delivery system %d not supported.\n",
1621                         __func__, desired_system);
1622                 return -EINVAL;
1623         }
1624
1625         type = dvbv3_type(desired_system);
1626
1627         /*
1628         * Get the last non-DVBv3 delivery system that has the same type
1629         * of the desired system
1630         */
1631         ncaps = 0;
1632         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1633                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1634                         delsys = fe->ops.delsys[ncaps];
1635                 ncaps++;
1636         }
1637
1638         /* There's nothing compatible with the desired delivery system */
1639         if (delsys == SYS_UNDEFINED) {
1640                 dev_dbg(fe->dvb->device,
1641                         "%s: Delivery system %d not supported on emulation mode.\n",
1642                         __func__, desired_system);
1643                 return -EINVAL;
1644         }
1645
1646         dev_dbg(fe->dvb->device,
1647                 "%s: Using delivery system %d emulated as if it were %d\n",
1648                 __func__, delsys, desired_system);
1649
1650         return emulate_delivery_system(fe, desired_system);
1651 }
1652
1653 /**
1654  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1655  * @fe: frontend struct
1656  *
1657  * A DVBv3 call doesn't know what's the desired system it wants. It also
1658  * doesn't allow to switch between different types. Due to that, userspace
1659  * should use DVBv5 instead.
1660  * However, in order to avoid breaking userspace API, limited backward
1661  * compatibility support is provided.
1662  *
1663  * There are some delivery systems that are incompatible with DVBv3 calls.
1664  *
1665  * This routine should work fine for frontends that support just one delivery
1666  * system.
1667  *
1668  * For frontends that support multiple frontends:
1669  * 1) It defaults to use the first supported delivery system. There's an
1670  *    userspace application that allows changing it at runtime;
1671  *
1672  * 2) If the current delivery system is not compatible with DVBv3, it gets
1673  *    the first one that it is compatible.
1674  *
1675  * NOTE: in order for this to work with applications like Kaffeine that
1676  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1677  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1678  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1679  *      to DVB-S.
1680  */
1681 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1682 {
1683         int ncaps;
1684         u32 delsys = SYS_UNDEFINED;
1685         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1686
1687         /* If not set yet, defaults to the first supported delivery system */
1688         if (c->delivery_system == SYS_UNDEFINED)
1689                 c->delivery_system = fe->ops.delsys[0];
1690
1691         /*
1692          * Trivial case: just use the current one, if it already a DVBv3
1693          * delivery system
1694          */
1695         if (is_dvbv3_delsys(c->delivery_system)) {
1696                 dev_dbg(fe->dvb->device,
1697                                 "%s: Using delivery system to %d\n",
1698                                 __func__, c->delivery_system);
1699                 return 0;
1700         }
1701
1702         /*
1703          * Seek for the first delivery system that it is compatible with a
1704          * DVBv3 standard
1705          */
1706         ncaps = 0;
1707         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1708                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1709                         delsys = fe->ops.delsys[ncaps];
1710                         break;
1711                 }
1712                 ncaps++;
1713         }
1714         if (delsys == SYS_UNDEFINED) {
1715                 dev_dbg(fe->dvb->device,
1716                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1717                         __func__);
1718                 return -EINVAL;
1719         }
1720         return emulate_delivery_system(fe, delsys);
1721 }
1722
1723 static int dtv_property_process_set(struct dvb_frontend *fe,
1724                                     struct dtv_property *tvp,
1725                                     struct file *file)
1726 {
1727         int r = 0;
1728         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1729
1730         /* Allow the frontend to validate incoming properties */
1731         if (fe->ops.set_property) {
1732                 r = fe->ops.set_property(fe, tvp);
1733                 if (r < 0)
1734                         return r;
1735         }
1736
1737         switch(tvp->cmd) {
1738         case DTV_CLEAR:
1739                 /*
1740                  * Reset a cache of data specific to the frontend here. This does
1741                  * not effect hardware.
1742                  */
1743                 dvb_frontend_clear_cache(fe);
1744                 break;
1745         case DTV_TUNE:
1746                 /* interpret the cache of data, build either a traditional frontend
1747                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1748                  * ioctl.
1749                  */
1750                 c->state = tvp->cmd;
1751                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1752                                 __func__);
1753
1754                 r = dtv_set_frontend(fe);
1755                 break;
1756         case DTV_FREQUENCY:
1757                 c->frequency = tvp->u.data;
1758                 break;
1759         case DTV_MODULATION:
1760                 c->modulation = tvp->u.data;
1761                 break;
1762         case DTV_BANDWIDTH_HZ:
1763                 c->bandwidth_hz = tvp->u.data;
1764                 break;
1765         case DTV_INVERSION:
1766                 c->inversion = tvp->u.data;
1767                 break;
1768         case DTV_SYMBOL_RATE:
1769                 c->symbol_rate = tvp->u.data;
1770                 break;
1771         case DTV_INNER_FEC:
1772                 c->fec_inner = tvp->u.data;
1773                 break;
1774         case DTV_PILOT:
1775                 c->pilot = tvp->u.data;
1776                 break;
1777         case DTV_ROLLOFF:
1778                 c->rolloff = tvp->u.data;
1779                 break;
1780         case DTV_DELIVERY_SYSTEM:
1781                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1782                 break;
1783         case DTV_VOLTAGE:
1784                 c->voltage = tvp->u.data;
1785                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1786                         (void *)c->voltage);
1787                 break;
1788         case DTV_TONE:
1789                 c->sectone = tvp->u.data;
1790                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1791                         (void *)c->sectone);
1792                 break;
1793         case DTV_CODE_RATE_HP:
1794                 c->code_rate_HP = tvp->u.data;
1795                 break;
1796         case DTV_CODE_RATE_LP:
1797                 c->code_rate_LP = tvp->u.data;
1798                 break;
1799         case DTV_GUARD_INTERVAL:
1800                 c->guard_interval = tvp->u.data;
1801                 break;
1802         case DTV_TRANSMISSION_MODE:
1803                 c->transmission_mode = tvp->u.data;
1804                 break;
1805         case DTV_HIERARCHY:
1806                 c->hierarchy = tvp->u.data;
1807                 break;
1808         case DTV_INTERLEAVING:
1809                 c->interleaving = tvp->u.data;
1810                 break;
1811
1812         /* ISDB-T Support here */
1813         case DTV_ISDBT_PARTIAL_RECEPTION:
1814                 c->isdbt_partial_reception = tvp->u.data;
1815                 break;
1816         case DTV_ISDBT_SOUND_BROADCASTING:
1817                 c->isdbt_sb_mode = tvp->u.data;
1818                 break;
1819         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1820                 c->isdbt_sb_subchannel = tvp->u.data;
1821                 break;
1822         case DTV_ISDBT_SB_SEGMENT_IDX:
1823                 c->isdbt_sb_segment_idx = tvp->u.data;
1824                 break;
1825         case DTV_ISDBT_SB_SEGMENT_COUNT:
1826                 c->isdbt_sb_segment_count = tvp->u.data;
1827                 break;
1828         case DTV_ISDBT_LAYER_ENABLED:
1829                 c->isdbt_layer_enabled = tvp->u.data;
1830                 break;
1831         case DTV_ISDBT_LAYERA_FEC:
1832                 c->layer[0].fec = tvp->u.data;
1833                 break;
1834         case DTV_ISDBT_LAYERA_MODULATION:
1835                 c->layer[0].modulation = tvp->u.data;
1836                 break;
1837         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1838                 c->layer[0].segment_count = tvp->u.data;
1839                 break;
1840         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1841                 c->layer[0].interleaving = tvp->u.data;
1842                 break;
1843         case DTV_ISDBT_LAYERB_FEC:
1844                 c->layer[1].fec = tvp->u.data;
1845                 break;
1846         case DTV_ISDBT_LAYERB_MODULATION:
1847                 c->layer[1].modulation = tvp->u.data;
1848                 break;
1849         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1850                 c->layer[1].segment_count = tvp->u.data;
1851                 break;
1852         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1853                 c->layer[1].interleaving = tvp->u.data;
1854                 break;
1855         case DTV_ISDBT_LAYERC_FEC:
1856                 c->layer[2].fec = tvp->u.data;
1857                 break;
1858         case DTV_ISDBT_LAYERC_MODULATION:
1859                 c->layer[2].modulation = tvp->u.data;
1860                 break;
1861         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1862                 c->layer[2].segment_count = tvp->u.data;
1863                 break;
1864         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1865                 c->layer[2].interleaving = tvp->u.data;
1866                 break;
1867
1868         /* Multistream support */
1869         case DTV_STREAM_ID:
1870         case DTV_DVBT2_PLP_ID_LEGACY:
1871                 c->stream_id = tvp->u.data;
1872                 break;
1873
1874         /* ATSC-MH */
1875         case DTV_ATSCMH_PARADE_ID:
1876                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1877                 break;
1878         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1879                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1880                 break;
1881
1882         case DTV_LNA:
1883                 c->lna = tvp->u.data;
1884                 if (fe->ops.set_lna)
1885                         r = fe->ops.set_lna(fe);
1886                 if (r < 0)
1887                         c->lna = LNA_AUTO;
1888                 break;
1889
1890         default:
1891                 return -EINVAL;
1892         }
1893
1894         return r;
1895 }
1896
1897 static int dvb_frontend_ioctl(struct file *file,
1898                         unsigned int cmd, void *parg)
1899 {
1900         struct dvb_device *dvbdev = file->private_data;
1901         struct dvb_frontend *fe = dvbdev->priv;
1902         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1903         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1904         int err = -EOPNOTSUPP;
1905
1906         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1907         if (down_interruptible(&fepriv->sem))
1908                 return -ERESTARTSYS;
1909
1910         if (fe->exit != DVB_FE_NO_EXIT) {
1911                 up(&fepriv->sem);
1912                 return -ENODEV;
1913         }
1914
1915         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1916             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1917              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1918                 up(&fepriv->sem);
1919                 return -EPERM;
1920         }
1921
1922         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1923                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1924         else {
1925                 c->state = DTV_UNDEFINED;
1926                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1927         }
1928
1929         up(&fepriv->sem);
1930         return err;
1931 }
1932
1933 static int dvb_frontend_ioctl_properties(struct file *file,
1934                         unsigned int cmd, void *parg)
1935 {
1936         struct dvb_device *dvbdev = file->private_data;
1937         struct dvb_frontend *fe = dvbdev->priv;
1938         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1939         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1940         int err = 0;
1941
1942         struct dtv_properties *tvps = parg;
1943         struct dtv_property *tvp = NULL;
1944         int i;
1945
1946         dev_dbg(fe->dvb->device, "%s:\n", __func__);
1947
1948         if (cmd == FE_SET_PROPERTY) {
1949                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1950                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1951
1952                 /* Put an arbitrary limit on the number of messages that can
1953                  * be sent at once */
1954                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1955                         return -EINVAL;
1956
1957                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1958                 if (!tvp) {
1959                         err = -ENOMEM;
1960                         goto out;
1961                 }
1962
1963                 if (copy_from_user(tvp, (void __user *)tvps->props,
1964                                    tvps->num * sizeof(struct dtv_property))) {
1965                         err = -EFAULT;
1966                         goto out;
1967                 }
1968
1969                 for (i = 0; i < tvps->num; i++) {
1970                         err = dtv_property_process_set(fe, tvp + i, file);
1971                         if (err < 0)
1972                                 goto out;
1973                         (tvp + i)->result = err;
1974                 }
1975
1976                 if (c->state == DTV_TUNE)
1977                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1978
1979         } else if (cmd == FE_GET_PROPERTY) {
1980                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1981                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1982
1983                 /* Put an arbitrary limit on the number of messages that can
1984                  * be sent at once */
1985                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1986                         return -EINVAL;
1987
1988                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1989                 if (!tvp) {
1990                         err = -ENOMEM;
1991                         goto out;
1992                 }
1993
1994                 if (copy_from_user(tvp, (void __user *)tvps->props,
1995                                    tvps->num * sizeof(struct dtv_property))) {
1996                         err = -EFAULT;
1997                         goto out;
1998                 }
1999
2000                 /*
2001                  * Fills the cache out struct with the cache contents, plus
2002                  * the data retrieved from get_frontend, if the frontend
2003                  * is not idle. Otherwise, returns the cached content
2004                  */
2005                 if (fepriv->state != FESTATE_IDLE) {
2006                         err = dtv_get_frontend(fe, NULL);
2007                         if (err < 0)
2008                                 goto out;
2009                 }
2010                 for (i = 0; i < tvps->num; i++) {
2011                         err = dtv_property_process_get(fe, c, tvp + i, file);
2012                         if (err < 0)
2013                                 goto out;
2014                         (tvp + i)->result = err;
2015                 }
2016
2017                 if (copy_to_user((void __user *)tvps->props, tvp,
2018                                  tvps->num * sizeof(struct dtv_property))) {
2019                         err = -EFAULT;
2020                         goto out;
2021                 }
2022
2023         } else
2024                 err = -EOPNOTSUPP;
2025
2026 out:
2027         kfree(tvp);
2028         return err;
2029 }
2030
2031 static int dtv_set_frontend(struct dvb_frontend *fe)
2032 {
2033         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2034         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2035         struct dvb_frontend_tune_settings fetunesettings;
2036         u32 rolloff = 0;
2037
2038         if (dvb_frontend_check_parameters(fe) < 0)
2039                 return -EINVAL;
2040
2041         /*
2042          * Initialize output parameters to match the values given by
2043          * the user. FE_SET_FRONTEND triggers an initial frontend event
2044          * with status = 0, which copies output parameters to userspace.
2045          */
2046         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2047
2048         /*
2049          * Be sure that the bandwidth will be filled for all
2050          * non-satellite systems, as tuners need to know what
2051          * low pass/Nyquist half filter should be applied, in
2052          * order to avoid inter-channel noise.
2053          *
2054          * ISDB-T and DVB-T/T2 already sets bandwidth.
2055          * ATSC and DVB-C don't set, so, the core should fill it.
2056          *
2057          * On DVB-C Annex A and C, the bandwidth is a function of
2058          * the roll-off and symbol rate. Annex B defines different
2059          * roll-off factors depending on the modulation. Fortunately,
2060          * Annex B is only used with 6MHz, so there's no need to
2061          * calculate it.
2062          *
2063          * While not officially supported, a side effect of handling it at
2064          * the cache level is that a program could retrieve the bandwidth
2065          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2066          */
2067         switch (c->delivery_system) {
2068         case SYS_ATSC:
2069         case SYS_DVBC_ANNEX_B:
2070                 c->bandwidth_hz = 6000000;
2071                 break;
2072         case SYS_DVBC_ANNEX_A:
2073                 rolloff = 115;
2074                 break;
2075         case SYS_DVBC_ANNEX_C:
2076                 rolloff = 113;
2077                 break;
2078         case SYS_DVBS:
2079         case SYS_TURBO:
2080         case SYS_ISDBS:
2081                 rolloff = 135;
2082                 break;
2083         case SYS_DVBS2:
2084                 switch (c->rolloff) {
2085                 case ROLLOFF_20:
2086                         rolloff = 120;
2087                         break;
2088                 case ROLLOFF_25:
2089                         rolloff = 125;
2090                         break;
2091                 default:
2092                 case ROLLOFF_35:
2093                         rolloff = 135;
2094                 }
2095                 break;
2096         default:
2097                 break;
2098         }
2099         if (rolloff)
2100                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
2101
2102         /* force auto frequency inversion if requested */
2103         if (dvb_force_auto_inversion)
2104                 c->inversion = INVERSION_AUTO;
2105
2106         /*
2107          * without hierarchical coding code_rate_LP is irrelevant,
2108          * so we tolerate the otherwise invalid FEC_NONE setting
2109          */
2110         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2111                 c->code_rate_LP = FEC_AUTO;
2112
2113         /* get frontend-specific tuning settings */
2114         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2115         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2116                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2117                 fepriv->max_drift = fetunesettings.max_drift;
2118                 fepriv->step_size = fetunesettings.step_size;
2119         } else {
2120                 /* default values */
2121                 switch (c->delivery_system) {
2122                 case SYS_DVBS:
2123                 case SYS_DVBS2:
2124                 case SYS_ISDBS:
2125                 case SYS_TURBO:
2126                 case SYS_DVBC_ANNEX_A:
2127                 case SYS_DVBC_ANNEX_C:
2128                         fepriv->min_delay = HZ / 20;
2129                         fepriv->step_size = c->symbol_rate / 16000;
2130                         fepriv->max_drift = c->symbol_rate / 2000;
2131                         break;
2132                 case SYS_DVBT:
2133                 case SYS_DVBT2:
2134                 case SYS_ISDBT:
2135                 case SYS_DTMB:
2136                         fepriv->min_delay = HZ / 20;
2137                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2138                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2139                         break;
2140                 default:
2141                         /*
2142                          * FIXME: This sounds wrong! if freqency_stepsize is
2143                          * defined by the frontend, why not use it???
2144                          */
2145                         fepriv->min_delay = HZ / 20;
2146                         fepriv->step_size = 0; /* no zigzag */
2147                         fepriv->max_drift = 0;
2148                         break;
2149                 }
2150         }
2151         if (dvb_override_tune_delay > 0)
2152                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2153
2154         fepriv->state = FESTATE_RETUNE;
2155
2156         /* Request the search algorithm to search */
2157         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2158
2159         dvb_frontend_clear_events(fe);
2160         dvb_frontend_add_event(fe, 0);
2161         dvb_frontend_wakeup(fe);
2162         fepriv->status = 0;
2163
2164         return 0;
2165 }
2166
2167
2168 static int dvb_frontend_ioctl_legacy(struct file *file,
2169                         unsigned int cmd, void *parg)
2170 {
2171         struct dvb_device *dvbdev = file->private_data;
2172         struct dvb_frontend *fe = dvbdev->priv;
2173         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2174         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2175         int err = -EOPNOTSUPP;
2176
2177         switch (cmd) {
2178         case FE_GET_INFO: {
2179                 struct dvb_frontend_info* info = parg;
2180
2181                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2182                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2183
2184                 /*
2185                  * Associate the 4 delivery systems supported by DVBv3
2186                  * API with their DVBv5 counterpart. For the other standards,
2187                  * use the closest type, assuming that it would hopefully
2188                  * work with a DVBv3 application.
2189                  * It should be noticed that, on multi-frontend devices with
2190                  * different types (terrestrial and cable, for example),
2191                  * a pure DVBv3 application won't be able to use all delivery
2192                  * systems. Yet, changing the DVBv5 cache to the other delivery
2193                  * system should be enough for making it work.
2194                  */
2195                 switch (dvbv3_type(c->delivery_system)) {
2196                 case DVBV3_QPSK:
2197                         info->type = FE_QPSK;
2198                         break;
2199                 case DVBV3_ATSC:
2200                         info->type = FE_ATSC;
2201                         break;
2202                 case DVBV3_QAM:
2203                         info->type = FE_QAM;
2204                         break;
2205                 case DVBV3_OFDM:
2206                         info->type = FE_OFDM;
2207                         break;
2208                 default:
2209                         dev_err(fe->dvb->device,
2210                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2211                                         __func__, c->delivery_system);
2212                         fe->ops.info.type = FE_OFDM;
2213                 }
2214                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2215                                  __func__, c->delivery_system, fe->ops.info.type);
2216
2217                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2218                  * do it, it is done for it. */
2219                 info->caps |= FE_CAN_INVERSION_AUTO;
2220                 err = 0;
2221                 break;
2222         }
2223
2224         case FE_READ_STATUS: {
2225                 fe_status_t* status = parg;
2226
2227                 /* if retune was requested but hasn't occurred yet, prevent
2228                  * that user get signal state from previous tuning */
2229                 if (fepriv->state == FESTATE_RETUNE ||
2230                     fepriv->state == FESTATE_ERROR) {
2231                         err=0;
2232                         *status = 0;
2233                         break;
2234                 }
2235
2236                 if (fe->ops.read_status)
2237                         err = fe->ops.read_status(fe, status);
2238                 break;
2239         }
2240
2241         case FE_READ_BER:
2242                 if (fe->ops.read_ber) {
2243                         if (fepriv->thread)
2244                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2245                         else
2246                                 err = -EAGAIN;
2247                 }
2248                 break;
2249
2250         case FE_READ_SIGNAL_STRENGTH:
2251                 if (fe->ops.read_signal_strength) {
2252                         if (fepriv->thread)
2253                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2254                         else
2255                                 err = -EAGAIN;
2256                 }
2257                 break;
2258
2259         case FE_READ_SNR:
2260                 if (fe->ops.read_snr) {
2261                         if (fepriv->thread)
2262                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2263                         else
2264                                 err = -EAGAIN;
2265                 }
2266                 break;
2267
2268         case FE_READ_UNCORRECTED_BLOCKS:
2269                 if (fe->ops.read_ucblocks) {
2270                         if (fepriv->thread)
2271                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2272                         else
2273                                 err = -EAGAIN;
2274                 }
2275                 break;
2276
2277         case FE_DISEQC_RESET_OVERLOAD:
2278                 if (fe->ops.diseqc_reset_overload) {
2279                         err = fe->ops.diseqc_reset_overload(fe);
2280                         fepriv->state = FESTATE_DISEQC;
2281                         fepriv->status = 0;
2282                 }
2283                 break;
2284
2285         case FE_DISEQC_SEND_MASTER_CMD:
2286                 if (fe->ops.diseqc_send_master_cmd) {
2287                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2288                         fepriv->state = FESTATE_DISEQC;
2289                         fepriv->status = 0;
2290                 }
2291                 break;
2292
2293         case FE_DISEQC_SEND_BURST:
2294                 if (fe->ops.diseqc_send_burst) {
2295                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2296                         fepriv->state = FESTATE_DISEQC;
2297                         fepriv->status = 0;
2298                 }
2299                 break;
2300
2301         case FE_SET_TONE:
2302                 if (fe->ops.set_tone) {
2303                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2304                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2305                         fepriv->state = FESTATE_DISEQC;
2306                         fepriv->status = 0;
2307                 }
2308                 break;
2309
2310         case FE_SET_VOLTAGE:
2311                 if (fe->ops.set_voltage) {
2312                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2313                         fepriv->voltage = (fe_sec_voltage_t) parg;
2314                         fepriv->state = FESTATE_DISEQC;
2315                         fepriv->status = 0;
2316                 }
2317                 break;
2318
2319         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2320                 if (fe->ops.dishnetwork_send_legacy_command) {
2321                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2322                         fepriv->state = FESTATE_DISEQC;
2323                         fepriv->status = 0;
2324                 } else if (fe->ops.set_voltage) {
2325                         /*
2326                          * NOTE: This is a fallback condition.  Some frontends
2327                          * (stv0299 for instance) take longer than 8msec to
2328                          * respond to a set_voltage command.  Those switches
2329                          * need custom routines to switch properly.  For all
2330                          * other frontends, the following should work ok.
2331                          * Dish network legacy switches (as used by Dish500)
2332                          * are controlled by sending 9-bit command words
2333                          * spaced 8msec apart.
2334                          * the actual command word is switch/port dependent
2335                          * so it is up to the userspace application to send
2336                          * the right command.
2337                          * The command must always start with a '0' after
2338                          * initialization, so parg is 8 bits and does not
2339                          * include the initialization or start bit
2340                          */
2341                         unsigned long swcmd = ((unsigned long) parg) << 1;
2342                         struct timeval nexttime;
2343                         struct timeval tv[10];
2344                         int i;
2345                         u8 last = 1;
2346                         if (dvb_frontend_debug)
2347                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2348                         do_gettimeofday(&nexttime);
2349                         if (dvb_frontend_debug)
2350                                 tv[0] = nexttime;
2351                         /* before sending a command, initialize by sending
2352                          * a 32ms 18V to the switch
2353                          */
2354                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2355                         dvb_frontend_sleep_until(&nexttime, 32000);
2356
2357                         for (i = 0; i < 9; i++) {
2358                                 if (dvb_frontend_debug)
2359                                         do_gettimeofday(&tv[i + 1]);
2360                                 if ((swcmd & 0x01) != last) {
2361                                         /* set voltage to (last ? 13V : 18V) */
2362                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2363                                         last = (last) ? 0 : 1;
2364                                 }
2365                                 swcmd = swcmd >> 1;
2366                                 if (i != 8)
2367                                         dvb_frontend_sleep_until(&nexttime, 8000);
2368                         }
2369                         if (dvb_frontend_debug) {
2370                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2371                                         __func__, fe->dvb->num);
2372                                 for (i = 1; i < 10; i++)
2373                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2374                         }
2375                         err = 0;
2376                         fepriv->state = FESTATE_DISEQC;
2377                         fepriv->status = 0;
2378                 }
2379                 break;
2380
2381         case FE_DISEQC_RECV_SLAVE_REPLY:
2382                 if (fe->ops.diseqc_recv_slave_reply)
2383                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2384                 break;
2385
2386         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2387                 if (fe->ops.enable_high_lnb_voltage)
2388                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2389                 break;
2390
2391         case FE_SET_FRONTEND:
2392                 err = dvbv3_set_delivery_system(fe);
2393                 if (err)
2394                         break;
2395
2396                 err = dtv_property_cache_sync(fe, c, parg);
2397                 if (err)
2398                         break;
2399                 err = dtv_set_frontend(fe);
2400                 break;
2401         case FE_GET_EVENT:
2402                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2403                 break;
2404
2405         case FE_GET_FRONTEND:
2406                 err = dtv_get_frontend(fe, parg);
2407                 break;
2408
2409         case FE_SET_FRONTEND_TUNE_MODE:
2410                 fepriv->tune_mode_flags = (unsigned long) parg;
2411                 err = 0;
2412                 break;
2413         }
2414
2415         return err;
2416 }
2417
2418
2419 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2420 {
2421         struct dvb_device *dvbdev = file->private_data;
2422         struct dvb_frontend *fe = dvbdev->priv;
2423         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2424
2425         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2426
2427         poll_wait (file, &fepriv->events.wait_queue, wait);
2428
2429         if (fepriv->events.eventw != fepriv->events.eventr)
2430                 return (POLLIN | POLLRDNORM | POLLPRI);
2431
2432         return 0;
2433 }
2434
2435 static int dvb_frontend_open(struct inode *inode, struct file *file)
2436 {
2437         struct dvb_device *dvbdev = file->private_data;
2438         struct dvb_frontend *fe = dvbdev->priv;
2439         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2440         struct dvb_adapter *adapter = fe->dvb;
2441         int ret;
2442
2443         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2444         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2445                 return -ENODEV;
2446
2447         if (adapter->mfe_shared) {
2448                 mutex_lock (&adapter->mfe_lock);
2449
2450                 if (adapter->mfe_dvbdev == NULL)
2451                         adapter->mfe_dvbdev = dvbdev;
2452
2453                 else if (adapter->mfe_dvbdev != dvbdev) {
2454                         struct dvb_device
2455                                 *mfedev = adapter->mfe_dvbdev;
2456                         struct dvb_frontend
2457                                 *mfe = mfedev->priv;
2458                         struct dvb_frontend_private
2459                                 *mfepriv = mfe->frontend_priv;
2460                         int mferetry = (dvb_mfe_wait_time << 1);
2461
2462                         mutex_unlock (&adapter->mfe_lock);
2463                         while (mferetry-- && (mfedev->users != -1 ||
2464                                         mfepriv->thread != NULL)) {
2465                                 if(msleep_interruptible(500)) {
2466                                         if(signal_pending(current))
2467                                                 return -EINTR;
2468                                 }
2469                         }
2470
2471                         mutex_lock (&adapter->mfe_lock);
2472                         if(adapter->mfe_dvbdev != dvbdev) {
2473                                 mfedev = adapter->mfe_dvbdev;
2474                                 mfe = mfedev->priv;
2475                                 mfepriv = mfe->frontend_priv;
2476                                 if (mfedev->users != -1 ||
2477                                                 mfepriv->thread != NULL) {
2478                                         mutex_unlock (&adapter->mfe_lock);
2479                                         return -EBUSY;
2480                                 }
2481                                 adapter->mfe_dvbdev = dvbdev;
2482                         }
2483                 }
2484         }
2485
2486         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2487                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2488                         goto err0;
2489
2490                 /* If we took control of the bus, we need to force
2491                    reinitialization.  This is because many ts_bus_ctrl()
2492                    functions strobe the RESET pin on the demod, and if the
2493                    frontend thread already exists then the dvb_init() routine
2494                    won't get called (which is what usually does initial
2495                    register configuration). */
2496                 fepriv->reinitialise = 1;
2497         }
2498
2499         if ((ret = dvb_generic_open (inode, file)) < 0)
2500                 goto err1;
2501
2502         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2503                 /* normal tune mode when opened R/W */
2504                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2505                 fepriv->tone = -1;
2506                 fepriv->voltage = -1;
2507
2508                 ret = dvb_frontend_start (fe);
2509                 if (ret)
2510                         goto err2;
2511
2512                 /*  empty event queue */
2513                 fepriv->events.eventr = fepriv->events.eventw = 0;
2514         }
2515
2516         if (adapter->mfe_shared)
2517                 mutex_unlock (&adapter->mfe_lock);
2518         return ret;
2519
2520 err2:
2521         dvb_generic_release(inode, file);
2522 err1:
2523         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2524                 fe->ops.ts_bus_ctrl(fe, 0);
2525 err0:
2526         if (adapter->mfe_shared)
2527                 mutex_unlock (&adapter->mfe_lock);
2528         return ret;
2529 }
2530
2531 static int dvb_frontend_release(struct inode *inode, struct file *file)
2532 {
2533         struct dvb_device *dvbdev = file->private_data;
2534         struct dvb_frontend *fe = dvbdev->priv;
2535         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2536         int ret;
2537
2538         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2539
2540         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2541                 fepriv->release_jiffies = jiffies;
2542                 mb();
2543         }
2544
2545         ret = dvb_generic_release (inode, file);
2546
2547         if (dvbdev->users == -1) {
2548                 wake_up(&fepriv->wait_queue);
2549                 if (fe->exit != DVB_FE_NO_EXIT)
2550                         wake_up(&dvbdev->wait_queue);
2551                 if (fe->ops.ts_bus_ctrl)
2552                         fe->ops.ts_bus_ctrl(fe, 0);
2553         }
2554
2555         return ret;
2556 }
2557
2558 static const struct file_operations dvb_frontend_fops = {
2559         .owner          = THIS_MODULE,
2560         .unlocked_ioctl = dvb_generic_ioctl,
2561         .poll           = dvb_frontend_poll,
2562         .open           = dvb_frontend_open,
2563         .release        = dvb_frontend_release,
2564         .llseek         = noop_llseek,
2565 };
2566
2567 int dvb_frontend_suspend(struct dvb_frontend *fe)
2568 {
2569         int ret = 0;
2570
2571         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2572                         fe->id);
2573
2574         if (fe->ops.tuner_ops.suspend)
2575                 ret = fe->ops.tuner_ops.suspend(fe);
2576         else if (fe->ops.tuner_ops.sleep)
2577                 ret = fe->ops.tuner_ops.sleep(fe);
2578
2579         if (fe->ops.sleep)
2580                 ret = fe->ops.sleep(fe);
2581
2582         return ret;
2583 }
2584 EXPORT_SYMBOL(dvb_frontend_suspend);
2585
2586 int dvb_frontend_resume(struct dvb_frontend *fe)
2587 {
2588         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2589         int ret = 0;
2590
2591         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2592                         fe->id);
2593
2594         fe->exit = DVB_FE_DEVICE_RESUME;
2595         if (fe->ops.init)
2596                 ret = fe->ops.init(fe);
2597
2598         if (fe->ops.tuner_ops.resume)
2599                 ret = fe->ops.tuner_ops.resume(fe);
2600         else if (fe->ops.tuner_ops.init)
2601                 ret = fe->ops.tuner_ops.init(fe);
2602
2603         fe->exit = DVB_FE_NO_EXIT;
2604         fepriv->state = FESTATE_RETUNE;
2605         dvb_frontend_wakeup(fe);
2606
2607         return ret;
2608 }
2609 EXPORT_SYMBOL(dvb_frontend_resume);
2610
2611 int dvb_register_frontend(struct dvb_adapter* dvb,
2612                           struct dvb_frontend* fe)
2613 {
2614         struct dvb_frontend_private *fepriv;
2615         static const struct dvb_device dvbdev_template = {
2616                 .users = ~0,
2617                 .writers = 1,
2618                 .readers = (~0)-1,
2619                 .fops = &dvb_frontend_fops,
2620                 .kernel_ioctl = dvb_frontend_ioctl
2621         };
2622
2623         dev_dbg(dvb->device, "%s:\n", __func__);
2624
2625         if (mutex_lock_interruptible(&frontend_mutex))
2626                 return -ERESTARTSYS;
2627
2628         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2629         if (fe->frontend_priv == NULL) {
2630                 mutex_unlock(&frontend_mutex);
2631                 return -ENOMEM;
2632         }
2633         fepriv = fe->frontend_priv;
2634
2635         sema_init(&fepriv->sem, 1);
2636         init_waitqueue_head (&fepriv->wait_queue);
2637         init_waitqueue_head (&fepriv->events.wait_queue);
2638         mutex_init(&fepriv->events.mtx);
2639         fe->dvb = dvb;
2640         fepriv->inversion = INVERSION_OFF;
2641
2642         dev_info(fe->dvb->device,
2643                         "DVB: registering adapter %i frontend %i (%s)...\n",
2644                         fe->dvb->num, fe->id, fe->ops.info.name);
2645
2646         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2647                              fe, DVB_DEVICE_FRONTEND);
2648
2649         /*
2650          * Initialize the cache to the proper values according with the
2651          * first supported delivery system (ops->delsys[0])
2652          */
2653
2654         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2655         dvb_frontend_clear_cache(fe);
2656
2657         mutex_unlock(&frontend_mutex);
2658         return 0;
2659 }
2660 EXPORT_SYMBOL(dvb_register_frontend);
2661
2662 int dvb_unregister_frontend(struct dvb_frontend* fe)
2663 {
2664         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2665         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2666
2667         mutex_lock(&frontend_mutex);
2668         dvb_frontend_stop (fe);
2669         mutex_unlock(&frontend_mutex);
2670
2671         if (fepriv->dvbdev->users < -1)
2672                 wait_event(fepriv->dvbdev->wait_queue,
2673                                 fepriv->dvbdev->users==-1);
2674
2675         mutex_lock(&frontend_mutex);
2676         dvb_unregister_device (fepriv->dvbdev);
2677
2678         /* fe is invalid now */
2679         kfree(fepriv);
2680         mutex_unlock(&frontend_mutex);
2681         return 0;
2682 }
2683 EXPORT_SYMBOL(dvb_unregister_frontend);
2684
2685 #ifdef CONFIG_MEDIA_ATTACH
2686 void dvb_frontend_detach(struct dvb_frontend* fe)
2687 {
2688         void *ptr;
2689
2690         if (fe->ops.release_sec) {
2691                 fe->ops.release_sec(fe);
2692                 dvb_detach(fe->ops.release_sec);
2693         }
2694         if (fe->ops.tuner_ops.release) {
2695                 fe->ops.tuner_ops.release(fe);
2696                 dvb_detach(fe->ops.tuner_ops.release);
2697         }
2698         if (fe->ops.analog_ops.release) {
2699                 fe->ops.analog_ops.release(fe);
2700                 dvb_detach(fe->ops.analog_ops.release);
2701         }
2702         ptr = (void*)fe->ops.release;
2703         if (ptr) {
2704                 fe->ops.release(fe);
2705                 dvb_detach(ptr);
2706         }
2707 }
2708 #else
2709 void dvb_frontend_detach(struct dvb_frontend* fe)
2710 {
2711         if (fe->ops.release_sec)
2712                 fe->ops.release_sec(fe);
2713         if (fe->ops.tuner_ops.release)
2714                 fe->ops.tuner_ops.release(fe);
2715         if (fe->ops.analog_ops.release)
2716                 fe->ops.analog_ops.release(fe);
2717         if (fe->ops.release)
2718                 fe->ops.release(fe);
2719 }
2720 #endif
2721 EXPORT_SYMBOL(dvb_frontend_detach);