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         default:
 966                 c->modulation = QAM_AUTO;
 967                 break;
 968         }
 969
 970         c->lna = LNA_AUTO;
 971
 972         return 0;
 973 }
 974
 975 #define _DTV_CMD(n, s, b) \
 976 [n] = { \
 977         .name = #n, \
 978         .cmd  = n, \
 979         .set  = s,\
 980         .buffer = b \
 981 }
 982
 983 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 984         _DTV_CMD(DTV_TUNE, 1, 0),
 985         _DTV_CMD(DTV_CLEAR, 1, 0),
 986
 987         /* Set */
 988         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 989         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 990         _DTV_CMD(DTV_MODULATION, 1, 0),
 991         _DTV_CMD(DTV_INVERSION, 1, 0),
 992         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 993         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 994         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 995         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 996         _DTV_CMD(DTV_TONE, 1, 0),
 997         _DTV_CMD(DTV_PILOT, 1, 0),
 998         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 999         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1000         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1001         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1002         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1003         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1004         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1005         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1006
1007         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1008         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1009         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1010         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1011         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1012         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1013         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1014         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1015         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1016         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1017         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1018         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1019         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1020         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1021         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1022         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1023         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1024         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1025
1026         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1027         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1028         _DTV_CMD(DTV_LNA, 1, 0),
1029
1030         /* Get */
1031         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1032         _DTV_CMD(DTV_API_VERSION, 0, 0),
1033
1034         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1035
1036         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1037         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1038
1039         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1040         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1041         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1042         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1043         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1044         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1045         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1046         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1047         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1048         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1049         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1050         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1051         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1052
1053         /* Statistics API */
1054         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1055         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1056         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1057         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1058         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1059         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1060         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1061         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1062 };
1063
1064 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1065 {
1066         int i;
1067
1068         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1069                 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1070                                 __func__, tvp->cmd);
1071                 return;
1072         }
1073
1074         dev_dbg(fe->dvb->device, "%s: tvp.cmd    = 0x%08x (%s)\n", __func__,
1075                         tvp->cmd, dtv_cmds[tvp->cmd].name);
1076
1077         if (dtv_cmds[tvp->cmd].buffer) {
1078                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1079                         __func__, tvp->u.buffer.len);
1080
1081                 for(i = 0; i < tvp->u.buffer.len; i++)
1082                         dev_dbg(fe->dvb->device,
1083                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1084                                         __func__, i, tvp->u.buffer.data[i]);
1085         } else {
1086                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1087                                 tvp->u.data);
1088         }
1089 }
1090
1091 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1092  * drivers can use a single set_frontend tuning function, regardless of whether
1093  * it's being used for the legacy or new API, reducing code and complexity.
1094  */
1095 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1096                                    struct dtv_frontend_properties *c,
1097                                    const struct dvb_frontend_parameters *p)
1098 {
1099         c->frequency = p->frequency;
1100         c->inversion = p->inversion;
1101
1102         switch (dvbv3_type(c->delivery_system)) {
1103         case DVBV3_QPSK:
1104                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1105                 c->symbol_rate = p->u.qpsk.symbol_rate;
1106                 c->fec_inner = p->u.qpsk.fec_inner;
1107                 break;
1108         case DVBV3_QAM:
1109                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1110                 c->symbol_rate = p->u.qam.symbol_rate;
1111                 c->fec_inner = p->u.qam.fec_inner;
1112                 c->modulation = p->u.qam.modulation;
1113                 break;
1114         case DVBV3_OFDM:
1115                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1116
1117                 switch (p->u.ofdm.bandwidth) {
1118                 case BANDWIDTH_10_MHZ:
1119                         c->bandwidth_hz = 10000000;
1120                         break;
1121                 case BANDWIDTH_8_MHZ:
1122                         c->bandwidth_hz = 8000000;
1123                         break;
1124                 case BANDWIDTH_7_MHZ:
1125                         c->bandwidth_hz = 7000000;
1126                         break;
1127                 case BANDWIDTH_6_MHZ:
1128                         c->bandwidth_hz = 6000000;
1129                         break;
1130                 case BANDWIDTH_5_MHZ:
1131                         c->bandwidth_hz = 5000000;
1132                         break;
1133                 case BANDWIDTH_1_712_MHZ:
1134                         c->bandwidth_hz = 1712000;
1135                         break;
1136                 case BANDWIDTH_AUTO:
1137                         c->bandwidth_hz = 0;
1138                 }
1139
1140                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1141                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1142                 c->modulation = p->u.ofdm.constellation;
1143                 c->transmission_mode = p->u.ofdm.transmission_mode;
1144                 c->guard_interval = p->u.ofdm.guard_interval;
1145                 c->hierarchy = p->u.ofdm.hierarchy_information;
1146                 break;
1147         case DVBV3_ATSC:
1148                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1149                 c->modulation = p->u.vsb.modulation;
1150                 if (c->delivery_system == SYS_ATSCMH)
1151                         break;
1152                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1153                         c->delivery_system = SYS_ATSC;
1154                 else
1155                         c->delivery_system = SYS_DVBC_ANNEX_B;
1156                 break;
1157         case DVBV3_UNKNOWN:
1158                 dev_err(fe->dvb->device,
1159                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1160                                 __func__, c->delivery_system);
1161                 return -EINVAL;
1162         }
1163
1164         return 0;
1165 }
1166
1167 /* Ensure the cached values are set correctly in the frontend
1168  * legacy tuning structures, for the advanced tuning API.
1169  */
1170 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1171                                             struct dvb_frontend_parameters *p)
1172 {
1173         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1174
1175         p->frequency = c->frequency;
1176         p->inversion = c->inversion;
1177
1178         switch (dvbv3_type(c->delivery_system)) {
1179         case DVBV3_UNKNOWN:
1180                 dev_err(fe->dvb->device,
1181                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1182                                 __func__, c->delivery_system);
1183                 return -EINVAL;
1184         case DVBV3_QPSK:
1185                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1186                 p->u.qpsk.symbol_rate = c->symbol_rate;
1187                 p->u.qpsk.fec_inner = c->fec_inner;
1188                 break;
1189         case DVBV3_QAM:
1190                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1191                 p->u.qam.symbol_rate = c->symbol_rate;
1192                 p->u.qam.fec_inner = c->fec_inner;
1193                 p->u.qam.modulation = c->modulation;
1194                 break;
1195         case DVBV3_OFDM:
1196                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1197                 switch (c->bandwidth_hz) {
1198                 case 10000000:
1199                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1200                         break;
1201                 case 8000000:
1202                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1203                         break;
1204                 case 7000000:
1205                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1206                         break;
1207                 case 6000000:
1208                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1209                         break;
1210                 case 5000000:
1211                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1212                         break;
1213                 case 1712000:
1214                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1215                         break;
1216                 case 0:
1217                 default:
1218                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1219                 }
1220                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1221                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1222                 p->u.ofdm.constellation = c->modulation;
1223                 p->u.ofdm.transmission_mode = c->transmission_mode;
1224                 p->u.ofdm.guard_interval = c->guard_interval;
1225                 p->u.ofdm.hierarchy_information = c->hierarchy;
1226                 break;
1227         case DVBV3_ATSC:
1228                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1229                 p->u.vsb.modulation = c->modulation;
1230                 break;
1231         }
1232         return 0;
1233 }
1234
1235 /**
1236  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1237  * @fe:         struct dvb_frontend pointer
1238  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1239  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1240  *
1241  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1242  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1243  * If p_out is not null, it will update the DVBv3 params pointed by it.
1244  */
1245 static int dtv_get_frontend(struct dvb_frontend *fe,
1246                             struct dvb_frontend_parameters *p_out)
1247 {
1248         int r;
1249
1250         if (fe->ops.get_frontend) {
1251                 r = fe->ops.get_frontend(fe);
1252                 if (unlikely(r < 0))
1253                         return r;
1254                 if (p_out)
1255                         dtv_property_legacy_params_sync(fe, p_out);
1256                 return 0;
1257         }
1258
1259         /* As everything is in cache, get_frontend fops are always supported */
1260         return 0;
1261 }
1262
1263 static int dvb_frontend_ioctl_legacy(struct file *file,
1264                         unsigned int cmd, void *parg);
1265 static int dvb_frontend_ioctl_properties(struct file *file,
1266                         unsigned int cmd, void *parg);
1267
1268 static int dtv_property_process_get(struct dvb_frontend *fe,
1269                                     const struct dtv_frontend_properties *c,
1270                                     struct dtv_property *tvp,
1271                                     struct file *file)
1272 {
1273         int r, ncaps;
1274
1275         switch(tvp->cmd) {
1276         case DTV_ENUM_DELSYS:
1277                 ncaps = 0;
1278                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1279                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1280                         ncaps++;
1281                 }
1282                 tvp->u.buffer.len = ncaps;
1283                 break;
1284         case DTV_FREQUENCY:
1285                 tvp->u.data = c->frequency;
1286                 break;
1287         case DTV_MODULATION:
1288                 tvp->u.data = c->modulation;
1289                 break;
1290         case DTV_BANDWIDTH_HZ:
1291                 tvp->u.data = c->bandwidth_hz;
1292                 break;
1293         case DTV_INVERSION:
1294                 tvp->u.data = c->inversion;
1295                 break;
1296         case DTV_SYMBOL_RATE:
1297                 tvp->u.data = c->symbol_rate;
1298                 break;
1299         case DTV_INNER_FEC:
1300                 tvp->u.data = c->fec_inner;
1301                 break;
1302         case DTV_PILOT:
1303                 tvp->u.data = c->pilot;
1304                 break;
1305         case DTV_ROLLOFF:
1306                 tvp->u.data = c->rolloff;
1307                 break;
1308         case DTV_DELIVERY_SYSTEM:
1309                 tvp->u.data = c->delivery_system;
1310                 break;
1311         case DTV_VOLTAGE:
1312                 tvp->u.data = c->voltage;
1313                 break;
1314         case DTV_TONE:
1315                 tvp->u.data = c->sectone;
1316                 break;
1317         case DTV_API_VERSION:
1318                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1319                 break;
1320         case DTV_CODE_RATE_HP:
1321                 tvp->u.data = c->code_rate_HP;
1322                 break;
1323         case DTV_CODE_RATE_LP:
1324                 tvp->u.data = c->code_rate_LP;
1325                 break;
1326         case DTV_GUARD_INTERVAL:
1327                 tvp->u.data = c->guard_interval;
1328                 break;
1329         case DTV_TRANSMISSION_MODE:
1330                 tvp->u.data = c->transmission_mode;
1331                 break;
1332         case DTV_HIERARCHY:
1333                 tvp->u.data = c->hierarchy;
1334                 break;
1335         case DTV_INTERLEAVING:
1336                 tvp->u.data = c->interleaving;
1337                 break;
1338
1339         /* ISDB-T Support here */
1340         case DTV_ISDBT_PARTIAL_RECEPTION:
1341                 tvp->u.data = c->isdbt_partial_reception;
1342                 break;
1343         case DTV_ISDBT_SOUND_BROADCASTING:
1344                 tvp->u.data = c->isdbt_sb_mode;
1345                 break;
1346         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1347                 tvp->u.data = c->isdbt_sb_subchannel;
1348                 break;
1349         case DTV_ISDBT_SB_SEGMENT_IDX:
1350                 tvp->u.data = c->isdbt_sb_segment_idx;
1351                 break;
1352         case DTV_ISDBT_SB_SEGMENT_COUNT:
1353                 tvp->u.data = c->isdbt_sb_segment_count;
1354                 break;
1355         case DTV_ISDBT_LAYER_ENABLED:
1356                 tvp->u.data = c->isdbt_layer_enabled;
1357                 break;
1358         case DTV_ISDBT_LAYERA_FEC:
1359                 tvp->u.data = c->layer[0].fec;
1360                 break;
1361         case DTV_ISDBT_LAYERA_MODULATION:
1362                 tvp->u.data = c->layer[0].modulation;
1363                 break;
1364         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1365                 tvp->u.data = c->layer[0].segment_count;
1366                 break;
1367         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1368                 tvp->u.data = c->layer[0].interleaving;
1369                 break;
1370         case DTV_ISDBT_LAYERB_FEC:
1371                 tvp->u.data = c->layer[1].fec;
1372                 break;
1373         case DTV_ISDBT_LAYERB_MODULATION:
1374                 tvp->u.data = c->layer[1].modulation;
1375                 break;
1376         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1377                 tvp->u.data = c->layer[1].segment_count;
1378                 break;
1379         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1380                 tvp->u.data = c->layer[1].interleaving;
1381                 break;
1382         case DTV_ISDBT_LAYERC_FEC:
1383                 tvp->u.data = c->layer[2].fec;
1384                 break;
1385         case DTV_ISDBT_LAYERC_MODULATION:
1386                 tvp->u.data = c->layer[2].modulation;
1387                 break;
1388         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1389                 tvp->u.data = c->layer[2].segment_count;
1390                 break;
1391         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1392                 tvp->u.data = c->layer[2].interleaving;
1393                 break;
1394
1395         /* Multistream support */
1396         case DTV_STREAM_ID:
1397         case DTV_DVBT2_PLP_ID_LEGACY:
1398                 tvp->u.data = c->stream_id;
1399                 break;
1400
1401         /* ATSC-MH */
1402         case DTV_ATSCMH_FIC_VER:
1403                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1404                 break;
1405         case DTV_ATSCMH_PARADE_ID:
1406                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1407                 break;
1408         case DTV_ATSCMH_NOG:
1409                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1410                 break;
1411         case DTV_ATSCMH_TNOG:
1412                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1413                 break;
1414         case DTV_ATSCMH_SGN:
1415                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1416                 break;
1417         case DTV_ATSCMH_PRC:
1418                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1419                 break;
1420         case DTV_ATSCMH_RS_FRAME_MODE:
1421                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1422                 break;
1423         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1424                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1425                 break;
1426         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1427                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1428                 break;
1429         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1430                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1431                 break;
1432         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1433                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1434                 break;
1435         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1436                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1437                 break;
1438         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1439                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1440                 break;
1441         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1442                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1443                 break;
1444         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1445                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1446                 break;
1447
1448         case DTV_LNA:
1449                 tvp->u.data = c->lna;
1450                 break;
1451
1452         /* Fill quality measures */
1453         case DTV_STAT_SIGNAL_STRENGTH:
1454                 tvp->u.st = c->strength;
1455                 break;
1456         case DTV_STAT_CNR:
1457                 tvp->u.st = c->cnr;
1458                 break;
1459         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1460                 tvp->u.st = c->pre_bit_error;
1461                 break;
1462         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1463                 tvp->u.st = c->pre_bit_count;
1464                 break;
1465         case DTV_STAT_POST_ERROR_BIT_COUNT:
1466                 tvp->u.st = c->post_bit_error;
1467                 break;
1468         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1469                 tvp->u.st = c->post_bit_count;
1470                 break;
1471         case DTV_STAT_ERROR_BLOCK_COUNT:
1472                 tvp->u.st = c->block_error;
1473                 break;
1474         case DTV_STAT_TOTAL_BLOCK_COUNT:
1475                 tvp->u.st = c->block_count;
1476                 break;
1477         default:
1478                 dev_dbg(fe->dvb->device,
1479                         "%s: FE property %d doesn't exist\n",
1480                         __func__, tvp->cmd);
1481                 return -EINVAL;
1482         }
1483
1484         /* Allow the frontend to override outgoing properties */
1485         if (fe->ops.get_property) {
1486                 r = fe->ops.get_property(fe, tvp);
1487                 if (r < 0)
1488                         return r;
1489         }
1490
1491         dtv_property_dump(fe, tvp);
1492
1493         return 0;
1494 }
1495
1496 static int dtv_set_frontend(struct dvb_frontend *fe);
1497
1498 static bool is_dvbv3_delsys(u32 delsys)
1499 {
1500         bool status;
1501
1502         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1503                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1504
1505         return status;
1506 }
1507
1508 /**
1509  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1510  * @fe:                 struct frontend;
1511  * @delsys:                     DVBv5 type that will be used for emulation
1512  *
1513  * Provides emulation for delivery systems that are compatible with the old
1514  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1515  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1516  * parameters are compatible with DVB-S spec.
1517  */
1518 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1519 {
1520         int i;
1521         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1522
1523         c->delivery_system = delsys;
1524
1525         /*
1526          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1527          */
1528         if (c->delivery_system == SYS_ISDBT) {
1529                 dev_dbg(fe->dvb->device,
1530                         "%s: Using defaults for SYS_ISDBT\n",
1531                         __func__);
1532
1533                 if (!c->bandwidth_hz)
1534                         c->bandwidth_hz = 6000000;
1535
1536                 c->isdbt_partial_reception = 0;
1537                 c->isdbt_sb_mode = 0;
1538                 c->isdbt_sb_subchannel = 0;
1539                 c->isdbt_sb_segment_idx = 0;
1540                 c->isdbt_sb_segment_count = 0;
1541                 c->isdbt_layer_enabled = 7;
1542                 for (i = 0; i < 3; i++) {
1543                         c->layer[i].fec = FEC_AUTO;
1544                         c->layer[i].modulation = QAM_AUTO;
1545                         c->layer[i].interleaving = 0;
1546                         c->layer[i].segment_count = 0;
1547                 }
1548         }
1549         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1550                 __func__, c->delivery_system);
1551
1552         return 0;
1553 }
1554
1555 /**
1556  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1557  * @fe:                 frontend struct
1558  * @desired_system:     delivery system requested by the user
1559  *
1560  * A DVBv5 call know what's the desired system it wants. So, set it.
1561  *
1562  * There are, however, a few known issues with early DVBv5 applications that
1563  * are also handled by this logic:
1564  *
1565  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1566  *    This is an API violation, but, as we don't want to break userspace,
1567  *    convert it to the first supported delivery system.
1568  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1569  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1570  *    ISDB-T provided backward compat with DVB-T.
1571  */
1572 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1573                                      u32 desired_system)
1574 {
1575         int ncaps;
1576         u32 delsys = SYS_UNDEFINED;
1577         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1578         enum dvbv3_emulation_type type;
1579
1580         /*
1581          * It was reported that some old DVBv5 applications were
1582          * filling delivery_system with SYS_UNDEFINED. If this happens,
1583          * assume that the application wants to use the first supported
1584          * delivery system.
1585          */
1586         if (desired_system == SYS_UNDEFINED)
1587                 desired_system = fe->ops.delsys[0];
1588
1589         /*
1590          * This is a DVBv5 call. So, it likely knows the supported
1591          * delivery systems. So, check if the desired delivery system is
1592          * supported
1593          */
1594         ncaps = 0;
1595         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1596                 if (fe->ops.delsys[ncaps] == desired_system) {
1597                         c->delivery_system = desired_system;
1598                         dev_dbg(fe->dvb->device,
1599                                         "%s: Changing delivery system to %d\n",
1600                                         __func__, desired_system);
1601                         return 0;
1602                 }
1603                 ncaps++;
1604         }
1605
1606         /*
1607          * The requested delivery system isn't supported. Maybe userspace
1608          * is requesting a DVBv3 compatible delivery system.
1609          *
1610          * The emulation only works if the desired system is one of the
1611          * delivery systems supported by DVBv3 API
1612          */
1613         if (!is_dvbv3_delsys(desired_system)) {
1614                 dev_dbg(fe->dvb->device,
1615                         "%s: Delivery system %d not supported.\n",
1616                         __func__, desired_system);
1617                 return -EINVAL;
1618         }
1619
1620         type = dvbv3_type(desired_system);
1621
1622         /*
1623         * Get the last non-DVBv3 delivery system that has the same type
1624         * of the desired system
1625         */
1626         ncaps = 0;
1627         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1628                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1629                         delsys = fe->ops.delsys[ncaps];
1630                 ncaps++;
1631         }
1632
1633         /* There's nothing compatible with the desired delivery system */
1634         if (delsys == SYS_UNDEFINED) {
1635                 dev_dbg(fe->dvb->device,
1636                         "%s: Delivery system %d not supported on emulation mode.\n",
1637                         __func__, desired_system);
1638                 return -EINVAL;
1639         }
1640
1641         dev_dbg(fe->dvb->device,
1642                 "%s: Using delivery system %d emulated as if it were %d\n",
1643                 __func__, delsys, desired_system);
1644
1645         return emulate_delivery_system(fe, desired_system);
1646 }
1647
1648 /**
1649  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1650  * @fe: frontend struct
1651  *
1652  * A DVBv3 call doesn't know what's the desired system it wants. It also
1653  * doesn't allow to switch between different types. Due to that, userspace
1654  * should use DVBv5 instead.
1655  * However, in order to avoid breaking userspace API, limited backward
1656  * compatibility support is provided.
1657  *
1658  * There are some delivery systems that are incompatible with DVBv3 calls.
1659  *
1660  * This routine should work fine for frontends that support just one delivery
1661  * system.
1662  *
1663  * For frontends that support multiple frontends:
1664  * 1) It defaults to use the first supported delivery system. There's an
1665  *    userspace application that allows changing it at runtime;
1666  *
1667  * 2) If the current delivery system is not compatible with DVBv3, it gets
1668  *    the first one that it is compatible.
1669  *
1670  * NOTE: in order for this to work with applications like Kaffeine that
1671  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1672  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1673  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1674  *      to DVB-S.
1675  */
1676 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1677 {
1678         int ncaps;
1679         u32 delsys = SYS_UNDEFINED;
1680         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1681
1682         /* If not set yet, defaults to the first supported delivery system */
1683         if (c->delivery_system == SYS_UNDEFINED)
1684                 c->delivery_system = fe->ops.delsys[0];
1685
1686         /*
1687          * Trivial case: just use the current one, if it already a DVBv3
1688          * delivery system
1689          */
1690         if (is_dvbv3_delsys(c->delivery_system)) {
1691                 dev_dbg(fe->dvb->device,
1692                                 "%s: Using delivery system to %d\n",
1693                                 __func__, c->delivery_system);
1694                 return 0;
1695         }
1696
1697         /*
1698          * Seek for the first delivery system that it is compatible with a
1699          * DVBv3 standard
1700          */
1701         ncaps = 0;
1702         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1703                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1704                         delsys = fe->ops.delsys[ncaps];
1705                         break;
1706                 }
1707                 ncaps++;
1708         }
1709         if (delsys == SYS_UNDEFINED) {
1710                 dev_dbg(fe->dvb->device,
1711                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1712                         __func__);
1713                 return -EINVAL;
1714         }
1715         return emulate_delivery_system(fe, delsys);
1716 }
1717
1718 static int dtv_property_process_set(struct dvb_frontend *fe,
1719                                     struct dtv_property *tvp,
1720                                     struct file *file)
1721 {
1722         int r = 0;
1723         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1724
1725         /* Allow the frontend to validate incoming properties */
1726         if (fe->ops.set_property) {
1727                 r = fe->ops.set_property(fe, tvp);
1728                 if (r < 0)
1729                         return r;
1730         }
1731
1732         switch(tvp->cmd) {
1733         case DTV_CLEAR:
1734                 /*
1735                  * Reset a cache of data specific to the frontend here. This does
1736                  * not effect hardware.
1737                  */
1738                 dvb_frontend_clear_cache(fe);
1739                 break;
1740         case DTV_TUNE:
1741                 /* interpret the cache of data, build either a traditional frontend
1742                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1743                  * ioctl.
1744                  */
1745                 c->state = tvp->cmd;
1746                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1747                                 __func__);
1748
1749                 r = dtv_set_frontend(fe);
1750                 break;
1751         case DTV_FREQUENCY:
1752                 c->frequency = tvp->u.data;
1753                 break;
1754         case DTV_MODULATION:
1755                 c->modulation = tvp->u.data;
1756                 break;
1757         case DTV_BANDWIDTH_HZ:
1758                 c->bandwidth_hz = tvp->u.data;
1759                 break;
1760         case DTV_INVERSION:
1761                 c->inversion = tvp->u.data;
1762                 break;
1763         case DTV_SYMBOL_RATE:
1764                 c->symbol_rate = tvp->u.data;
1765                 break;
1766         case DTV_INNER_FEC:
1767                 c->fec_inner = tvp->u.data;
1768                 break;
1769         case DTV_PILOT:
1770                 c->pilot = tvp->u.data;
1771                 break;
1772         case DTV_ROLLOFF:
1773                 c->rolloff = tvp->u.data;
1774                 break;
1775         case DTV_DELIVERY_SYSTEM:
1776                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1777                 break;
1778         case DTV_VOLTAGE:
1779                 c->voltage = tvp->u.data;
1780                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1781                         (void *)c->voltage);
1782                 break;
1783         case DTV_TONE:
1784                 c->sectone = tvp->u.data;
1785                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1786                         (void *)c->sectone);
1787                 break;
1788         case DTV_CODE_RATE_HP:
1789                 c->code_rate_HP = tvp->u.data;
1790                 break;
1791         case DTV_CODE_RATE_LP:
1792                 c->code_rate_LP = tvp->u.data;
1793                 break;
1794         case DTV_GUARD_INTERVAL:
1795                 c->guard_interval = tvp->u.data;
1796                 break;
1797         case DTV_TRANSMISSION_MODE:
1798                 c->transmission_mode = tvp->u.data;
1799                 break;
1800         case DTV_HIERARCHY:
1801                 c->hierarchy = tvp->u.data;
1802                 break;
1803         case DTV_INTERLEAVING:
1804                 c->interleaving = tvp->u.data;
1805                 break;
1806
1807         /* ISDB-T Support here */
1808         case DTV_ISDBT_PARTIAL_RECEPTION:
1809                 c->isdbt_partial_reception = tvp->u.data;
1810                 break;
1811         case DTV_ISDBT_SOUND_BROADCASTING:
1812                 c->isdbt_sb_mode = tvp->u.data;
1813                 break;
1814         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1815                 c->isdbt_sb_subchannel = tvp->u.data;
1816                 break;
1817         case DTV_ISDBT_SB_SEGMENT_IDX:
1818                 c->isdbt_sb_segment_idx = tvp->u.data;
1819                 break;
1820         case DTV_ISDBT_SB_SEGMENT_COUNT:
1821                 c->isdbt_sb_segment_count = tvp->u.data;
1822                 break;
1823         case DTV_ISDBT_LAYER_ENABLED:
1824                 c->isdbt_layer_enabled = tvp->u.data;
1825                 break;
1826         case DTV_ISDBT_LAYERA_FEC:
1827                 c->layer[0].fec = tvp->u.data;
1828                 break;
1829         case DTV_ISDBT_LAYERA_MODULATION:
1830                 c->layer[0].modulation = tvp->u.data;
1831                 break;
1832         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1833                 c->layer[0].segment_count = tvp->u.data;
1834                 break;
1835         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1836                 c->layer[0].interleaving = tvp->u.data;
1837                 break;
1838         case DTV_ISDBT_LAYERB_FEC:
1839                 c->layer[1].fec = tvp->u.data;
1840                 break;
1841         case DTV_ISDBT_LAYERB_MODULATION:
1842                 c->layer[1].modulation = tvp->u.data;
1843                 break;
1844         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1845                 c->layer[1].segment_count = tvp->u.data;
1846                 break;
1847         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1848                 c->layer[1].interleaving = tvp->u.data;
1849                 break;
1850         case DTV_ISDBT_LAYERC_FEC:
1851                 c->layer[2].fec = tvp->u.data;
1852                 break;
1853         case DTV_ISDBT_LAYERC_MODULATION:
1854                 c->layer[2].modulation = tvp->u.data;
1855                 break;
1856         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1857                 c->layer[2].segment_count = tvp->u.data;
1858                 break;
1859         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1860                 c->layer[2].interleaving = tvp->u.data;
1861                 break;
1862
1863         /* Multistream support */
1864         case DTV_STREAM_ID:
1865         case DTV_DVBT2_PLP_ID_LEGACY:
1866                 c->stream_id = tvp->u.data;
1867                 break;
1868
1869         /* ATSC-MH */
1870         case DTV_ATSCMH_PARADE_ID:
1871                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1872                 break;
1873         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1874                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1875                 break;
1876
1877         case DTV_LNA:
1878                 c->lna = tvp->u.data;
1879                 if (fe->ops.set_lna)
1880                         r = fe->ops.set_lna(fe);
1881                 if (r < 0)
1882                         c->lna = LNA_AUTO;
1883                 break;
1884
1885         default:
1886                 return -EINVAL;
1887         }
1888
1889         return r;
1890 }
1891
1892 static int dvb_frontend_ioctl(struct file *file,
1893                         unsigned int cmd, void *parg)
1894 {
1895         struct dvb_device *dvbdev = file->private_data;
1896         struct dvb_frontend *fe = dvbdev->priv;
1897         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1898         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1899         int err = -EOPNOTSUPP;
1900
1901         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1902         if (down_interruptible(&fepriv->sem))
1903                 return -ERESTARTSYS;
1904
1905         if (fe->exit != DVB_FE_NO_EXIT) {
1906                 up(&fepriv->sem);
1907                 return -ENODEV;
1908         }
1909
1910         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1911             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1912              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1913                 up(&fepriv->sem);
1914                 return -EPERM;
1915         }
1916
1917         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1918                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1919         else {
1920                 c->state = DTV_UNDEFINED;
1921                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1922         }
1923
1924         up(&fepriv->sem);
1925         return err;
1926 }
1927
1928 static int dvb_frontend_ioctl_properties(struct file *file,
1929                         unsigned int cmd, void *parg)
1930 {
1931         struct dvb_device *dvbdev = file->private_data;
1932         struct dvb_frontend *fe = dvbdev->priv;
1933         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1934         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1935         int err = 0;
1936
1937         struct dtv_properties *tvps = parg;
1938         struct dtv_property *tvp = NULL;
1939         int i;
1940
1941         dev_dbg(fe->dvb->device, "%s:\n", __func__);
1942
1943         if (cmd == FE_SET_PROPERTY) {
1944                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1945                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1946
1947                 /* Put an arbitrary limit on the number of messages that can
1948                  * be sent at once */
1949                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1950                         return -EINVAL;
1951
1952                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1953                 if (!tvp) {
1954                         err = -ENOMEM;
1955                         goto out;
1956                 }
1957
1958                 if (copy_from_user(tvp, (void __user *)tvps->props,
1959                                    tvps->num * sizeof(struct dtv_property))) {
1960                         err = -EFAULT;
1961                         goto out;
1962                 }
1963
1964                 for (i = 0; i < tvps->num; i++) {
1965                         err = dtv_property_process_set(fe, tvp + i, file);
1966                         if (err < 0)
1967                                 goto out;
1968                         (tvp + i)->result = err;
1969                 }
1970
1971                 if (c->state == DTV_TUNE)
1972                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1973
1974         } else if (cmd == FE_GET_PROPERTY) {
1975                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1976                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1977
1978                 /* Put an arbitrary limit on the number of messages that can
1979                  * be sent at once */
1980                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1981                         return -EINVAL;
1982
1983                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1984                 if (!tvp) {
1985                         err = -ENOMEM;
1986                         goto out;
1987                 }
1988
1989                 if (copy_from_user(tvp, (void __user *)tvps->props,
1990                                    tvps->num * sizeof(struct dtv_property))) {
1991                         err = -EFAULT;
1992                         goto out;
1993                 }
1994
1995                 /*
1996                  * Fills the cache out struct with the cache contents, plus
1997                  * the data retrieved from get_frontend, if the frontend
1998                  * is not idle. Otherwise, returns the cached content
1999                  */
2000                 if (fepriv->state != FESTATE_IDLE) {
2001                         err = dtv_get_frontend(fe, NULL);
2002                         if (err < 0)
2003                                 goto out;
2004                 }
2005                 for (i = 0; i < tvps->num; i++) {
2006                         err = dtv_property_process_get(fe, c, tvp + i, file);
2007                         if (err < 0)
2008                                 goto out;
2009                         (tvp + i)->result = err;
2010                 }
2011
2012                 if (copy_to_user((void __user *)tvps->props, tvp,
2013                                  tvps->num * sizeof(struct dtv_property))) {
2014                         err = -EFAULT;
2015                         goto out;
2016                 }
2017
2018         } else
2019                 err = -EOPNOTSUPP;
2020
2021 out:
2022         kfree(tvp);
2023         return err;
2024 }
2025
2026 static int dtv_set_frontend(struct dvb_frontend *fe)
2027 {
2028         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2029         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2030         struct dvb_frontend_tune_settings fetunesettings;
2031         u32 rolloff = 0;
2032
2033         if (dvb_frontend_check_parameters(fe) < 0)
2034                 return -EINVAL;
2035
2036         /*
2037          * Initialize output parameters to match the values given by
2038          * the user. FE_SET_FRONTEND triggers an initial frontend event
2039          * with status = 0, which copies output parameters to userspace.
2040          */
2041         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2042
2043         /*
2044          * Be sure that the bandwidth will be filled for all
2045          * non-satellite systems, as tuners need to know what
2046          * low pass/Nyquist half filter should be applied, in
2047          * order to avoid inter-channel noise.
2048          *
2049          * ISDB-T and DVB-T/T2 already sets bandwidth.
2050          * ATSC and DVB-C don't set, so, the core should fill it.
2051          *
2052          * On DVB-C Annex A and C, the bandwidth is a function of
2053          * the roll-off and symbol rate. Annex B defines different
2054          * roll-off factors depending on the modulation. Fortunately,
2055          * Annex B is only used with 6MHz, so there's no need to
2056          * calculate it.
2057          *
2058          * While not officially supported, a side effect of handling it at
2059          * the cache level is that a program could retrieve the bandwidth
2060          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2061          */
2062         switch (c->delivery_system) {
2063         case SYS_ATSC:
2064         case SYS_DVBC_ANNEX_B:
2065                 c->bandwidth_hz = 6000000;
2066                 break;
2067         case SYS_DVBC_ANNEX_A:
2068                 rolloff = 115;
2069                 break;
2070         case SYS_DVBC_ANNEX_C:
2071                 rolloff = 113;
2072                 break;
2073         case SYS_DVBS:
2074         case SYS_TURBO:
2075                 rolloff = 135;
2076                 break;
2077         case SYS_DVBS2:
2078                 switch (c->rolloff) {
2079                 case ROLLOFF_20:
2080                         rolloff = 120;
2081                         break;
2082                 case ROLLOFF_25:
2083                         rolloff = 125;
2084                         break;
2085                 default:
2086                 case ROLLOFF_35:
2087                         rolloff = 135;
2088                 }
2089                 break;
2090         default:
2091                 break;
2092         }
2093         if (rolloff)
2094                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
2095
2096         /* force auto frequency inversion if requested */
2097         if (dvb_force_auto_inversion)
2098                 c->inversion = INVERSION_AUTO;
2099
2100         /*
2101          * without hierarchical coding code_rate_LP is irrelevant,
2102          * so we tolerate the otherwise invalid FEC_NONE setting
2103          */
2104         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2105                 c->code_rate_LP = FEC_AUTO;
2106
2107         /* get frontend-specific tuning settings */
2108         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2109         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2110                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2111                 fepriv->max_drift = fetunesettings.max_drift;
2112                 fepriv->step_size = fetunesettings.step_size;
2113         } else {
2114                 /* default values */
2115                 switch (c->delivery_system) {
2116                 case SYS_DVBS:
2117                 case SYS_DVBS2:
2118                 case SYS_ISDBS:
2119                 case SYS_TURBO:
2120                 case SYS_DVBC_ANNEX_A:
2121                 case SYS_DVBC_ANNEX_C:
2122                         fepriv->min_delay = HZ / 20;
2123                         fepriv->step_size = c->symbol_rate / 16000;
2124                         fepriv->max_drift = c->symbol_rate / 2000;
2125                         break;
2126                 case SYS_DVBT:
2127                 case SYS_DVBT2:
2128                 case SYS_ISDBT:
2129                 case SYS_DTMB:
2130                         fepriv->min_delay = HZ / 20;
2131                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2132                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2133                         break;
2134                 default:
2135                         /*
2136                          * FIXME: This sounds wrong! if freqency_stepsize is
2137                          * defined by the frontend, why not use it???
2138                          */
2139                         fepriv->min_delay = HZ / 20;
2140                         fepriv->step_size = 0; /* no zigzag */
2141                         fepriv->max_drift = 0;
2142                         break;
2143                 }
2144         }
2145         if (dvb_override_tune_delay > 0)
2146                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2147
2148         fepriv->state = FESTATE_RETUNE;
2149
2150         /* Request the search algorithm to search */
2151         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2152
2153         dvb_frontend_clear_events(fe);
2154         dvb_frontend_add_event(fe, 0);
2155         dvb_frontend_wakeup(fe);
2156         fepriv->status = 0;
2157
2158         return 0;
2159 }
2160
2161
2162 static int dvb_frontend_ioctl_legacy(struct file *file,
2163                         unsigned int cmd, void *parg)
2164 {
2165         struct dvb_device *dvbdev = file->private_data;
2166         struct dvb_frontend *fe = dvbdev->priv;
2167         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2168         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2169         int err = -EOPNOTSUPP;
2170
2171         switch (cmd) {
2172         case FE_GET_INFO: {
2173                 struct dvb_frontend_info* info = parg;
2174
2175                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2176                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2177
2178                 /*
2179                  * Associate the 4 delivery systems supported by DVBv3
2180                  * API with their DVBv5 counterpart. For the other standards,
2181                  * use the closest type, assuming that it would hopefully
2182                  * work with a DVBv3 application.
2183                  * It should be noticed that, on multi-frontend devices with
2184                  * different types (terrestrial and cable, for example),
2185                  * a pure DVBv3 application won't be able to use all delivery
2186                  * systems. Yet, changing the DVBv5 cache to the other delivery
2187                  * system should be enough for making it work.
2188                  */
2189                 switch (dvbv3_type(c->delivery_system)) {
2190                 case DVBV3_QPSK:
2191                         info->type = FE_QPSK;
2192                         break;
2193                 case DVBV3_ATSC:
2194                         info->type = FE_ATSC;
2195                         break;
2196                 case DVBV3_QAM:
2197                         info->type = FE_QAM;
2198                         break;
2199                 case DVBV3_OFDM:
2200                         info->type = FE_OFDM;
2201                         break;
2202                 default:
2203                         dev_err(fe->dvb->device,
2204                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2205                                         __func__, c->delivery_system);
2206                         fe->ops.info.type = FE_OFDM;
2207                 }
2208                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2209                                  __func__, c->delivery_system, fe->ops.info.type);
2210
2211                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2212                  * do it, it is done for it. */
2213                 info->caps |= FE_CAN_INVERSION_AUTO;
2214                 err = 0;
2215                 break;
2216         }
2217
2218         case FE_READ_STATUS: {
2219                 fe_status_t* status = parg;
2220
2221                 /* if retune was requested but hasn't occurred yet, prevent
2222                  * that user get signal state from previous tuning */
2223                 if (fepriv->state == FESTATE_RETUNE ||
2224                     fepriv->state == FESTATE_ERROR) {
2225                         err=0;
2226                         *status = 0;
2227                         break;
2228                 }
2229
2230                 if (fe->ops.read_status)
2231                         err = fe->ops.read_status(fe, status);
2232                 break;
2233         }
2234
2235         case FE_READ_BER:
2236                 if (fe->ops.read_ber) {
2237                         if (fepriv->thread)
2238                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2239                         else
2240                                 err = -EAGAIN;
2241                 }
2242                 break;
2243
2244         case FE_READ_SIGNAL_STRENGTH:
2245                 if (fe->ops.read_signal_strength) {
2246                         if (fepriv->thread)
2247                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2248                         else
2249                                 err = -EAGAIN;
2250                 }
2251                 break;
2252
2253         case FE_READ_SNR:
2254                 if (fe->ops.read_snr) {
2255                         if (fepriv->thread)
2256                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2257                         else
2258                                 err = -EAGAIN;
2259                 }
2260                 break;
2261
2262         case FE_READ_UNCORRECTED_BLOCKS:
2263                 if (fe->ops.read_ucblocks) {
2264                         if (fepriv->thread)
2265                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2266                         else
2267                                 err = -EAGAIN;
2268                 }
2269                 break;
2270
2271         case FE_DISEQC_RESET_OVERLOAD:
2272                 if (fe->ops.diseqc_reset_overload) {
2273                         err = fe->ops.diseqc_reset_overload(fe);
2274                         fepriv->state = FESTATE_DISEQC;
2275                         fepriv->status = 0;
2276                 }
2277                 break;
2278
2279         case FE_DISEQC_SEND_MASTER_CMD:
2280                 if (fe->ops.diseqc_send_master_cmd) {
2281                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2282                         fepriv->state = FESTATE_DISEQC;
2283                         fepriv->status = 0;
2284                 }
2285                 break;
2286
2287         case FE_DISEQC_SEND_BURST:
2288                 if (fe->ops.diseqc_send_burst) {
2289                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2290                         fepriv->state = FESTATE_DISEQC;
2291                         fepriv->status = 0;
2292                 }
2293                 break;
2294
2295         case FE_SET_TONE:
2296                 if (fe->ops.set_tone) {
2297                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2298                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2299                         fepriv->state = FESTATE_DISEQC;
2300                         fepriv->status = 0;
2301                 }
2302                 break;
2303
2304         case FE_SET_VOLTAGE:
2305                 if (fe->ops.set_voltage) {
2306                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2307                         fepriv->voltage = (fe_sec_voltage_t) parg;
2308                         fepriv->state = FESTATE_DISEQC;
2309                         fepriv->status = 0;
2310                 }
2311                 break;
2312
2313         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2314                 if (fe->ops.dishnetwork_send_legacy_command) {
2315                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2316                         fepriv->state = FESTATE_DISEQC;
2317                         fepriv->status = 0;
2318                 } else if (fe->ops.set_voltage) {
2319                         /*
2320                          * NOTE: This is a fallback condition.  Some frontends
2321                          * (stv0299 for instance) take longer than 8msec to
2322                          * respond to a set_voltage command.  Those switches
2323                          * need custom routines to switch properly.  For all
2324                          * other frontends, the following should work ok.
2325                          * Dish network legacy switches (as used by Dish500)
2326                          * are controlled by sending 9-bit command words
2327                          * spaced 8msec apart.
2328                          * the actual command word is switch/port dependent
2329                          * so it is up to the userspace application to send
2330                          * the right command.
2331                          * The command must always start with a '0' after
2332                          * initialization, so parg is 8 bits and does not
2333                          * include the initialization or start bit
2334                          */
2335                         unsigned long swcmd = ((unsigned long) parg) << 1;
2336                         struct timeval nexttime;
2337                         struct timeval tv[10];
2338                         int i;
2339                         u8 last = 1;
2340                         if (dvb_frontend_debug)
2341                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2342                         do_gettimeofday(&nexttime);
2343                         if (dvb_frontend_debug)
2344                                 tv[0] = nexttime;
2345                         /* before sending a command, initialize by sending
2346                          * a 32ms 18V to the switch
2347                          */
2348                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2349                         dvb_frontend_sleep_until(&nexttime, 32000);
2350
2351                         for (i = 0; i < 9; i++) {
2352                                 if (dvb_frontend_debug)
2353                                         do_gettimeofday(&tv[i + 1]);
2354                                 if ((swcmd & 0x01) != last) {
2355                                         /* set voltage to (last ? 13V : 18V) */
2356                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2357                                         last = (last) ? 0 : 1;
2358                                 }
2359                                 swcmd = swcmd >> 1;
2360                                 if (i != 8)
2361                                         dvb_frontend_sleep_until(&nexttime, 8000);
2362                         }
2363                         if (dvb_frontend_debug) {
2364                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2365                                         __func__, fe->dvb->num);
2366                                 for (i = 1; i < 10; i++)
2367                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2368                         }
2369                         err = 0;
2370                         fepriv->state = FESTATE_DISEQC;
2371                         fepriv->status = 0;
2372                 }
2373                 break;
2374
2375         case FE_DISEQC_RECV_SLAVE_REPLY:
2376                 if (fe->ops.diseqc_recv_slave_reply)
2377                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2378                 break;
2379
2380         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2381                 if (fe->ops.enable_high_lnb_voltage)
2382                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2383                 break;
2384
2385         case FE_SET_FRONTEND:
2386                 err = dvbv3_set_delivery_system(fe);
2387                 if (err)
2388                         break;
2389
2390                 err = dtv_property_cache_sync(fe, c, parg);
2391                 if (err)
2392                         break;
2393                 err = dtv_set_frontend(fe);
2394                 break;
2395         case FE_GET_EVENT:
2396                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2397                 break;
2398
2399         case FE_GET_FRONTEND:
2400                 err = dtv_get_frontend(fe, parg);
2401                 break;
2402
2403         case FE_SET_FRONTEND_TUNE_MODE:
2404                 fepriv->tune_mode_flags = (unsigned long) parg;
2405                 err = 0;
2406                 break;
2407         }
2408
2409         return err;
2410 }
2411
2412
2413 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2414 {
2415         struct dvb_device *dvbdev = file->private_data;
2416         struct dvb_frontend *fe = dvbdev->priv;
2417         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2418
2419         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2420
2421         poll_wait (file, &fepriv->events.wait_queue, wait);
2422
2423         if (fepriv->events.eventw != fepriv->events.eventr)
2424                 return (POLLIN | POLLRDNORM | POLLPRI);
2425
2426         return 0;
2427 }
2428
2429 static int dvb_frontend_open(struct inode *inode, struct file *file)
2430 {
2431         struct dvb_device *dvbdev = file->private_data;
2432         struct dvb_frontend *fe = dvbdev->priv;
2433         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2434         struct dvb_adapter *adapter = fe->dvb;
2435         int ret;
2436
2437         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2438         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2439                 return -ENODEV;
2440
2441         if (adapter->mfe_shared) {
2442                 mutex_lock (&adapter->mfe_lock);
2443
2444                 if (adapter->mfe_dvbdev == NULL)
2445                         adapter->mfe_dvbdev = dvbdev;
2446
2447                 else if (adapter->mfe_dvbdev != dvbdev) {
2448                         struct dvb_device
2449                                 *mfedev = adapter->mfe_dvbdev;
2450                         struct dvb_frontend
2451                                 *mfe = mfedev->priv;
2452                         struct dvb_frontend_private
2453                                 *mfepriv = mfe->frontend_priv;
2454                         int mferetry = (dvb_mfe_wait_time << 1);
2455
2456                         mutex_unlock (&adapter->mfe_lock);
2457                         while (mferetry-- && (mfedev->users != -1 ||
2458                                         mfepriv->thread != NULL)) {
2459                                 if(msleep_interruptible(500)) {
2460                                         if(signal_pending(current))
2461                                                 return -EINTR;
2462                                 }
2463                         }
2464
2465                         mutex_lock (&adapter->mfe_lock);
2466                         if(adapter->mfe_dvbdev != dvbdev) {
2467                                 mfedev = adapter->mfe_dvbdev;
2468                                 mfe = mfedev->priv;
2469                                 mfepriv = mfe->frontend_priv;
2470                                 if (mfedev->users != -1 ||
2471                                                 mfepriv->thread != NULL) {
2472                                         mutex_unlock (&adapter->mfe_lock);
2473                                         return -EBUSY;
2474                                 }
2475                                 adapter->mfe_dvbdev = dvbdev;
2476                         }
2477                 }
2478         }
2479
2480         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2481                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2482                         goto err0;
2483
2484                 /* If we took control of the bus, we need to force
2485                    reinitialization.  This is because many ts_bus_ctrl()
2486                    functions strobe the RESET pin on the demod, and if the
2487                    frontend thread already exists then the dvb_init() routine
2488                    won't get called (which is what usually does initial
2489                    register configuration). */
2490                 fepriv->reinitialise = 1;
2491         }
2492
2493         if ((ret = dvb_generic_open (inode, file)) < 0)
2494                 goto err1;
2495
2496         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2497                 /* normal tune mode when opened R/W */
2498                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2499                 fepriv->tone = -1;
2500                 fepriv->voltage = -1;
2501
2502                 ret = dvb_frontend_start (fe);
2503                 if (ret)
2504                         goto err2;
2505
2506                 /*  empty event queue */
2507                 fepriv->events.eventr = fepriv->events.eventw = 0;
2508         }
2509
2510         if (adapter->mfe_shared)
2511                 mutex_unlock (&adapter->mfe_lock);
2512         return ret;
2513
2514 err2:
2515         dvb_generic_release(inode, file);
2516 err1:
2517         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2518                 fe->ops.ts_bus_ctrl(fe, 0);
2519 err0:
2520         if (adapter->mfe_shared)
2521                 mutex_unlock (&adapter->mfe_lock);
2522         return ret;
2523 }
2524
2525 static int dvb_frontend_release(struct inode *inode, struct file *file)
2526 {
2527         struct dvb_device *dvbdev = file->private_data;
2528         struct dvb_frontend *fe = dvbdev->priv;
2529         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2530         int ret;
2531
2532         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2533
2534         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2535                 fepriv->release_jiffies = jiffies;
2536                 mb();
2537         }
2538
2539         ret = dvb_generic_release (inode, file);
2540
2541         if (dvbdev->users == -1) {
2542                 wake_up(&fepriv->wait_queue);
2543                 if (fe->exit != DVB_FE_NO_EXIT)
2544                         wake_up(&dvbdev->wait_queue);
2545                 if (fe->ops.ts_bus_ctrl)
2546                         fe->ops.ts_bus_ctrl(fe, 0);
2547         }
2548
2549         return ret;
2550 }
2551
2552 static const struct file_operations dvb_frontend_fops = {
2553         .owner          = THIS_MODULE,
2554         .unlocked_ioctl = dvb_generic_ioctl,
2555         .poll           = dvb_frontend_poll,
2556         .open           = dvb_frontend_open,
2557         .release        = dvb_frontend_release,
2558         .llseek         = noop_llseek,
2559 };
2560
2561 int dvb_frontend_suspend(struct dvb_frontend *fe)
2562 {
2563         int ret = 0;
2564
2565         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2566                         fe->id);
2567
2568         if (fe->ops.tuner_ops.suspend)
2569                 ret = fe->ops.tuner_ops.suspend(fe);
2570         else if (fe->ops.tuner_ops.sleep)
2571                 ret = fe->ops.tuner_ops.sleep(fe);
2572
2573         if (fe->ops.sleep)
2574                 ret = fe->ops.sleep(fe);
2575
2576         return ret;
2577 }
2578 EXPORT_SYMBOL(dvb_frontend_suspend);
2579
2580 int dvb_frontend_resume(struct dvb_frontend *fe)
2581 {
2582         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2583         int ret = 0;
2584
2585         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2586                         fe->id);
2587
2588         fe->exit = DVB_FE_DEVICE_RESUME;
2589         if (fe->ops.init)
2590                 ret = fe->ops.init(fe);
2591
2592         if (fe->ops.tuner_ops.resume)
2593                 ret = fe->ops.tuner_ops.resume(fe);
2594         else if (fe->ops.tuner_ops.init)
2595                 ret = fe->ops.tuner_ops.init(fe);
2596
2597         fe->exit = DVB_FE_NO_EXIT;
2598         fepriv->state = FESTATE_RETUNE;
2599         dvb_frontend_wakeup(fe);
2600
2601         return ret;
2602 }
2603 EXPORT_SYMBOL(dvb_frontend_resume);
2604
2605 int dvb_register_frontend(struct dvb_adapter* dvb,
2606                           struct dvb_frontend* fe)
2607 {
2608         struct dvb_frontend_private *fepriv;
2609         static const struct dvb_device dvbdev_template = {
2610                 .users = ~0,
2611                 .writers = 1,
2612                 .readers = (~0)-1,
2613                 .fops = &dvb_frontend_fops,
2614                 .kernel_ioctl = dvb_frontend_ioctl
2615         };
2616
2617         dev_dbg(dvb->device, "%s:\n", __func__);
2618
2619         if (mutex_lock_interruptible(&frontend_mutex))
2620                 return -ERESTARTSYS;
2621
2622         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2623         if (fe->frontend_priv == NULL) {
2624                 mutex_unlock(&frontend_mutex);
2625                 return -ENOMEM;
2626         }
2627         fepriv = fe->frontend_priv;
2628
2629         sema_init(&fepriv->sem, 1);
2630         init_waitqueue_head (&fepriv->wait_queue);
2631         init_waitqueue_head (&fepriv->events.wait_queue);
2632         mutex_init(&fepriv->events.mtx);
2633         fe->dvb = dvb;
2634         fepriv->inversion = INVERSION_OFF;
2635
2636         dev_info(fe->dvb->device,
2637                         "DVB: registering adapter %i frontend %i (%s)...\n",
2638                         fe->dvb->num, fe->id, fe->ops.info.name);
2639
2640         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2641                              fe, DVB_DEVICE_FRONTEND);
2642
2643         /*
2644          * Initialize the cache to the proper values according with the
2645          * first supported delivery system (ops->delsys[0])
2646          */
2647
2648         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2649         dvb_frontend_clear_cache(fe);
2650
2651         mutex_unlock(&frontend_mutex);
2652         return 0;
2653 }
2654 EXPORT_SYMBOL(dvb_register_frontend);
2655
2656 int dvb_unregister_frontend(struct dvb_frontend* fe)
2657 {
2658         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2659         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2660
2661         mutex_lock(&frontend_mutex);
2662         dvb_frontend_stop (fe);
2663         mutex_unlock(&frontend_mutex);
2664
2665         if (fepriv->dvbdev->users < -1)
2666                 wait_event(fepriv->dvbdev->wait_queue,
2667                                 fepriv->dvbdev->users==-1);
2668
2669         mutex_lock(&frontend_mutex);
2670         dvb_unregister_device (fepriv->dvbdev);
2671
2672         /* fe is invalid now */
2673         kfree(fepriv);
2674         mutex_unlock(&frontend_mutex);
2675         return 0;
2676 }
2677 EXPORT_SYMBOL(dvb_unregister_frontend);
2678
2679 #ifdef CONFIG_MEDIA_ATTACH
2680 void dvb_frontend_detach(struct dvb_frontend* fe)
2681 {
2682         void *ptr;
2683
2684         if (fe->ops.release_sec) {
2685                 fe->ops.release_sec(fe);
2686                 dvb_detach(fe->ops.release_sec);
2687         }
2688         if (fe->ops.tuner_ops.release) {
2689                 fe->ops.tuner_ops.release(fe);
2690                 dvb_detach(fe->ops.tuner_ops.release);
2691         }
2692         if (fe->ops.analog_ops.release) {
2693                 fe->ops.analog_ops.release(fe);
2694                 dvb_detach(fe->ops.analog_ops.release);
2695         }
2696         ptr = (void*)fe->ops.release;
2697         if (ptr) {
2698                 fe->ops.release(fe);
2699                 dvb_detach(ptr);
2700         }
2701 }
2702 #else
2703 void dvb_frontend_detach(struct dvb_frontend* fe)
2704 {
2705         if (fe->ops.release_sec)
2706                 fe->ops.release_sec(fe);
2707         if (fe->ops.tuner_ops.release)
2708                 fe->ops.tuner_ops.release(fe);
2709         if (fe->ops.analog_ops.release)
2710                 fe->ops.analog_ops.release(fe);
2711         if (fe->ops.release)
2712                 fe->ops.release(fe);
2713 }
2714 #endif
2715 EXPORT_SYMBOL(dvb_frontend_detach);