drivers/media/dvb-core/dvb_frontend.c

   1 /*
   2  * dvb_frontend.c: DVB frontend tuning interface/thread
   3  *
   4  *
   5  * Copyright (C) 1999-2001 Ralph  Metzler
   6  *                         Marcus Metzler
   7  *                         Holger Waechtler
   8  *                                    for convergence integrated media GmbH
   9  *
  10  * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26  */
  27
  28 /* Enables DVBv3 compatibility bits at the headers */
  29 #define __DVB_CORE__
  30
  31 #include <linux/string.h>
  32 #include <linux/kernel.h>
  33 #include <linux/sched.h>
  34 #include <linux/wait.h>
  35 #include <linux/slab.h>
  36 #include <linux/poll.h>
  37 #include <linux/semaphore.h>
  38 #include <linux/module.h>
  39 #include <linux/list.h>
  40 #include <linux/freezer.h>
  41 #include <linux/jiffies.h>
  42 #include <linux/kthread.h>
  43 #include <asm/processor.h>
  44
  45 #include "dvb_frontend.h"
  46 #include "dvbdev.h"
  47 #include <linux/dvb/version.h>
  48
  49 static int dvb_frontend_debug;
  50 static int dvb_shutdown_timeout;
  51 static int dvb_force_auto_inversion;
  52 static int dvb_override_tune_delay;
  53 static int dvb_powerdown_on_sleep = 1;
  54 static int dvb_mfe_wait_time = 5;
  55
  56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  58 module_param(dvb_shutdown_timeout, int, 0644);
  59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  60 module_param(dvb_force_auto_inversion, int, 0644);
  61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  62 module_param(dvb_override_tune_delay, int, 0644);
  63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  64 module_param(dvb_powerdown_on_sleep, int, 0644);
  65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  66 module_param(dvb_mfe_wait_time, int, 0644);
  67 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
  68
  69 #define FESTATE_IDLE 1
  70 #define FESTATE_RETUNE 2
  71 #define FESTATE_TUNING_FAST 4
  72 #define FESTATE_TUNING_SLOW 8
  73 #define FESTATE_TUNED 16
  74 #define FESTATE_ZIGZAG_FAST 32
  75 #define FESTATE_ZIGZAG_SLOW 64
  76 #define FESTATE_DISEQC 128
  77 #define FESTATE_ERROR 256
  78 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  79 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  80 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  81 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  82
  83 #define FE_ALGO_HW              1
  84 /*
  85  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  86  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  87  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  88  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  89  * FESTATE_TUNED. The frontend has successfully locked on.
  90  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  91  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  92  * FESTATE_DISEQC. A DISEQC command has just been issued.
  93  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  94  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  95  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  96  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  97  */
  98
  99 #define DVB_FE_NO_EXIT  0
 100 #define DVB_FE_NORMAL_EXIT      1
 101 #define DVB_FE_DEVICE_REMOVED   2
 102
 103 static DEFINE_MUTEX(frontend_mutex);
 104
 105 struct dvb_frontend_private {
 106
 107         /* thread/frontend values */
 108         struct dvb_device *dvbdev;
 109         struct dvb_frontend_parameters parameters_out;
 110         struct dvb_fe_events events;
 111         struct semaphore sem;
 112         struct list_head list_head;
 113         wait_queue_head_t wait_queue;
 114         struct task_struct *thread;
 115         unsigned long release_jiffies;
 116         unsigned int exit;
 117         unsigned int wakeup;
 118         fe_status_t status;
 119         unsigned long tune_mode_flags;
 120         unsigned int delay;
 121         unsigned int reinitialise;
 122         int tone;
 123         int voltage;
 124
 125         /* swzigzag values */
 126         unsigned int state;
 127         unsigned int bending;
 128         int lnb_drift;
 129         unsigned int inversion;
 130         unsigned int auto_step;
 131         unsigned int auto_sub_step;
 132         unsigned int started_auto_step;
 133         unsigned int min_delay;
 134         unsigned int max_drift;
 135         unsigned int step_size;
 136         int quality;
 137         unsigned int check_wrapped;
 138         enum dvbfe_search algo_status;
 139 };
 140
 141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 142 static int dtv_get_frontend(struct dvb_frontend *fe,
 143                             struct dvb_frontend_parameters *p_out);
 144 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 145                                            struct dvb_frontend_parameters *p);
 146
 147 static bool has_get_frontend(struct dvb_frontend *fe)
 148 {
 149         return fe->ops.get_frontend != NULL;
 150 }
 151
 152 /*
 153  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 154  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 155  * otherwise, a DVBv3 call will fail.
 156  */
 157 enum dvbv3_emulation_type {
 158         DVBV3_UNKNOWN,
 159         DVBV3_QPSK,
 160         DVBV3_QAM,
 161         DVBV3_OFDM,
 162         DVBV3_ATSC,
 163 };
 164
 165 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 166 {
 167         switch (delivery_system) {
 168         case SYS_DVBC_ANNEX_A:
 169         case SYS_DVBC_ANNEX_C:
 170                 return DVBV3_QAM;
 171         case SYS_DVBS:
 172         case SYS_DVBS2:
 173         case SYS_TURBO:
 174         case SYS_ISDBS:
 175         case SYS_DSS:
 176                 return DVBV3_QPSK;
 177         case SYS_DVBT:
 178         case SYS_DVBT2:
 179         case SYS_ISDBT:
 180         case SYS_DTMB:
 181                 return DVBV3_OFDM;
 182         case SYS_ATSC:
 183         case SYS_ATSCMH:
 184         case SYS_DVBC_ANNEX_B:
 185                 return DVBV3_ATSC;
 186         case SYS_UNDEFINED:
 187         case SYS_ISDBC:
 188         case SYS_DVBH:
 189         case SYS_DAB:
 190         default:
 191                 /*
 192                  * Doesn't know how to emulate those types and/or
 193                  * there's no frontend driver from this type yet
 194                  * with some emulation code, so, we're not sure yet how
 195                  * to handle them, or they're not compatible with a DVBv3 call.
 196                  */
 197                 return DVBV3_UNKNOWN;
 198         }
 199 }
 200
 201 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 202 {
 203         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 204         struct dvb_fe_events *events = &fepriv->events;
 205         struct dvb_frontend_event *e;
 206         int wp;
 207
 208         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 209
 210         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 211                 dtv_get_frontend(fe, &fepriv->parameters_out);
 212
 213         mutex_lock(&events->mtx);
 214
 215         wp = (events->eventw + 1) % MAX_EVENT;
 216         if (wp == events->eventr) {
 217                 events->overflow = 1;
 218                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 219         }
 220
 221         e = &events->events[events->eventw];
 222         e->status = status;
 223         e->parameters = fepriv->parameters_out;
 224
 225         events->eventw = wp;
 226
 227         mutex_unlock(&events->mtx);
 228
 229         wake_up_interruptible (&events->wait_queue);
 230 }
 231
 232 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 233                             struct dvb_frontend_event *event, int flags)
 234 {
 235         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 236         struct dvb_fe_events *events = &fepriv->events;
 237
 238         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 239
 240         if (events->overflow) {
 241                 events->overflow = 0;
 242                 return -EOVERFLOW;
 243         }
 244
 245         if (events->eventw == events->eventr) {
 246                 int ret;
 247
 248                 if (flags & O_NONBLOCK)
 249                         return -EWOULDBLOCK;
 250
 251                 up(&fepriv->sem);
 252
 253                 ret = wait_event_interruptible (events->wait_queue,
 254                                                 events->eventw != events->eventr);
 255
 256                 if (down_interruptible (&fepriv->sem))
 257                         return -ERESTARTSYS;
 258
 259                 if (ret < 0)
 260                         return ret;
 261         }
 262
 263         mutex_lock(&events->mtx);
 264         *event = events->events[events->eventr];
 265         events->eventr = (events->eventr + 1) % MAX_EVENT;
 266         mutex_unlock(&events->mtx);
 267
 268         return 0;
 269 }
 270
 271 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 272 {
 273         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 274         struct dvb_fe_events *events = &fepriv->events;
 275
 276         mutex_lock(&events->mtx);
 277         events->eventr = events->eventw;
 278         mutex_unlock(&events->mtx);
 279 }
 280
 281 static void dvb_frontend_init(struct dvb_frontend *fe)
 282 {
 283         dev_dbg(fe->dvb->device,
 284                         "%s: initialising adapter %i frontend %i (%s)...\n",
 285                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 286
 287         if (fe->ops.init)
 288                 fe->ops.init(fe);
 289         if (fe->ops.tuner_ops.init) {
 290                 if (fe->ops.i2c_gate_ctrl)
 291                         fe->ops.i2c_gate_ctrl(fe, 1);
 292                 fe->ops.tuner_ops.init(fe);
 293                 if (fe->ops.i2c_gate_ctrl)
 294                         fe->ops.i2c_gate_ctrl(fe, 0);
 295         }
 296 }
 297
 298 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 299 {
 300         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 301
 302         fepriv->reinitialise = 1;
 303         dvb_frontend_wakeup(fe);
 304 }
 305 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 306
 307 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 308 {
 309         int q2;
 310         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 311
 312         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 313
 314         if (locked)
 315                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 316         else
 317                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 318
 319         q2 = fepriv->quality - 128;
 320         q2 *= q2;
 321
 322         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 323 }
 324
 325 /**
 326  * Performs automatic twiddling of frontend parameters.
 327  *
 328  * @param fe The frontend concerned.
 329  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 330  * @returns Number of complete iterations that have been performed.
 331  */
 332 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 333 {
 334         int autoinversion;
 335         int ready = 0;
 336         int fe_set_err = 0;
 337         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 338         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 339         int original_inversion = c->inversion;
 340         u32 original_frequency = c->frequency;
 341
 342         /* are we using autoinversion? */
 343         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 344                          (c->inversion == INVERSION_AUTO));
 345
 346         /* setup parameters correctly */
 347         while(!ready) {
 348                 /* calculate the lnb_drift */
 349                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 350
 351                 /* wrap the auto_step if we've exceeded the maximum drift */
 352                 if (fepriv->lnb_drift > fepriv->max_drift) {
 353                         fepriv->auto_step = 0;
 354                         fepriv->auto_sub_step = 0;
 355                         fepriv->lnb_drift = 0;
 356                 }
 357
 358                 /* perform inversion and +/- zigzag */
 359                 switch(fepriv->auto_sub_step) {
 360                 case 0:
 361                         /* try with the current inversion and current drift setting */
 362                         ready = 1;
 363                         break;
 364
 365                 case 1:
 366                         if (!autoinversion) break;
 367
 368                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 369                         ready = 1;
 370                         break;
 371
 372                 case 2:
 373                         if (fepriv->lnb_drift == 0) break;
 374
 375                         fepriv->lnb_drift = -fepriv->lnb_drift;
 376                         ready = 1;
 377                         break;
 378
 379                 case 3:
 380                         if (fepriv->lnb_drift == 0) break;
 381                         if (!autoinversion) break;
 382
 383                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 384                         fepriv->lnb_drift = -fepriv->lnb_drift;
 385                         ready = 1;
 386                         break;
 387
 388                 default:
 389                         fepriv->auto_step++;
 390                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 391                         break;
 392                 }
 393
 394                 if (!ready) fepriv->auto_sub_step++;
 395         }
 396
 397         /* if this attempt would hit where we started, indicate a complete
 398          * iteration has occurred */
 399         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 400             (fepriv->auto_sub_step == 0) && check_wrapped) {
 401                 return 1;
 402         }
 403
 404         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 405                         "auto_sub_step:%i started_auto_step:%i\n",
 406                         __func__, fepriv->lnb_drift, fepriv->inversion,
 407                         fepriv->auto_step, fepriv->auto_sub_step,
 408                         fepriv->started_auto_step);
 409
 410         /* set the frontend itself */
 411         c->frequency += fepriv->lnb_drift;
 412         if (autoinversion)
 413                 c->inversion = fepriv->inversion;
 414         tmp = *c;
 415         if (fe->ops.set_frontend)
 416                 fe_set_err = fe->ops.set_frontend(fe);
 417         *c = tmp;
 418         if (fe_set_err < 0) {
 419                 fepriv->state = FESTATE_ERROR;
 420                 return fe_set_err;
 421         }
 422
 423         c->frequency = original_frequency;
 424         c->inversion = original_inversion;
 425
 426         fepriv->auto_sub_step++;
 427         return 0;
 428 }
 429
 430 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 431 {
 432         fe_status_t s = 0;
 433         int retval = 0;
 434         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 435         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 436
 437         /* if we've got no parameters, just keep idling */
 438         if (fepriv->state & FESTATE_IDLE) {
 439                 fepriv->delay = 3*HZ;
 440                 fepriv->quality = 0;
 441                 return;
 442         }
 443
 444         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 445         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 446                 if (fepriv->state & FESTATE_RETUNE) {
 447                         tmp = *c;
 448                         if (fe->ops.set_frontend)
 449                                 retval = fe->ops.set_frontend(fe);
 450                         *c = tmp;
 451                         if (retval < 0)
 452                                 fepriv->state = FESTATE_ERROR;
 453                         else
 454                                 fepriv->state = FESTATE_TUNED;
 455                 }
 456                 fepriv->delay = 3*HZ;
 457                 fepriv->quality = 0;
 458                 return;
 459         }
 460
 461         /* get the frontend status */
 462         if (fepriv->state & FESTATE_RETUNE) {
 463                 s = 0;
 464         } else {
 465                 if (fe->ops.read_status)
 466                         fe->ops.read_status(fe, &s);
 467                 if (s != fepriv->status) {
 468                         dvb_frontend_add_event(fe, s);
 469                         fepriv->status = s;
 470                 }
 471         }
 472
 473         /* if we're not tuned, and we have a lock, move to the TUNED state */
 474         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 475                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 476                 fepriv->state = FESTATE_TUNED;
 477
 478                 /* if we're tuned, then we have determined the correct inversion */
 479                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 480                     (c->inversion == INVERSION_AUTO)) {
 481                         c->inversion = fepriv->inversion;
 482                 }
 483                 return;
 484         }
 485
 486         /* if we are tuned already, check we're still locked */
 487         if (fepriv->state & FESTATE_TUNED) {
 488                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 489
 490                 /* we're tuned, and the lock is still good... */
 491                 if (s & FE_HAS_LOCK) {
 492                         return;
 493                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 494                         fepriv->state = FESTATE_ZIGZAG_FAST;
 495                         fepriv->started_auto_step = fepriv->auto_step;
 496                         fepriv->check_wrapped = 0;
 497                 }
 498         }
 499
 500         /* don't actually do anything if we're in the LOSTLOCK state,
 501          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 502         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 503             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 504                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 505                 return;
 506         }
 507
 508         /* don't do anything if we're in the DISEQC state, since this
 509          * might be someone with a motorized dish controlled by DISEQC.
 510          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 511         if (fepriv->state & FESTATE_DISEQC) {
 512                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 513                 return;
 514         }
 515
 516         /* if we're in the RETUNE state, set everything up for a brand
 517          * new scan, keeping the current inversion setting, as the next
 518          * tune is _very_ likely to require the same */
 519         if (fepriv->state & FESTATE_RETUNE) {
 520                 fepriv->lnb_drift = 0;
 521                 fepriv->auto_step = 0;
 522                 fepriv->auto_sub_step = 0;
 523                 fepriv->started_auto_step = 0;
 524                 fepriv->check_wrapped = 0;
 525         }
 526
 527         /* fast zigzag. */
 528         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 529                 fepriv->delay = fepriv->min_delay;
 530
 531                 /* perform a tune */
 532                 retval = dvb_frontend_swzigzag_autotune(fe,
 533                                                         fepriv->check_wrapped);
 534                 if (retval < 0) {
 535                         return;
 536                 } else if (retval) {
 537                         /* OK, if we've run out of trials at the fast speed.
 538                          * Drop back to slow for the _next_ attempt */
 539                         fepriv->state = FESTATE_SEARCHING_SLOW;
 540                         fepriv->started_auto_step = fepriv->auto_step;
 541                         return;
 542                 }
 543                 fepriv->check_wrapped = 1;
 544
 545                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 546                  * This ensures we cannot return from an
 547                  * FE_SET_FRONTEND ioctl before the first frontend tune
 548                  * occurs */
 549                 if (fepriv->state & FESTATE_RETUNE) {
 550                         fepriv->state = FESTATE_TUNING_FAST;
 551                 }
 552         }
 553
 554         /* slow zigzag */
 555         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 556                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 557
 558                 /* Note: don't bother checking for wrapping; we stay in this
 559                  * state until we get a lock */
 560                 dvb_frontend_swzigzag_autotune(fe, 0);
 561         }
 562 }
 563
 564 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 565 {
 566         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 567
 568         if (fepriv->exit != DVB_FE_NO_EXIT)
 569                 return 1;
 570
 571         if (fepriv->dvbdev->writers == 1)
 572                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 573                                   dvb_shutdown_timeout * HZ))
 574                         return 1;
 575
 576         return 0;
 577 }
 578
 579 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 580 {
 581         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 582
 583         if (fepriv->wakeup) {
 584                 fepriv->wakeup = 0;
 585                 return 1;
 586         }
 587         return dvb_frontend_is_exiting(fe);
 588 }
 589
 590 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 591 {
 592         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 593
 594         fepriv->wakeup = 1;
 595         wake_up_interruptible(&fepriv->wait_queue);
 596 }
 597
 598 static int dvb_frontend_thread(void *data)
 599 {
 600         struct dvb_frontend *fe = data;
 601         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 602         fe_status_t s;
 603         enum dvbfe_algo algo;
 604
 605         bool re_tune = false;
 606         bool semheld = false;
 607
 608         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 609
 610         fepriv->check_wrapped = 0;
 611         fepriv->quality = 0;
 612         fepriv->delay = 3*HZ;
 613         fepriv->status = 0;
 614         fepriv->wakeup = 0;
 615         fepriv->reinitialise = 0;
 616
 617         dvb_frontend_init(fe);
 618
 619         set_freezable();
 620         while (1) {
 621                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 622 restart:
 623                 wait_event_interruptible_timeout(fepriv->wait_queue,
 624                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 625                                 || freezing(current),
 626                         fepriv->delay);
 627
 628                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 629                         /* got signal or quitting */
 630                         if (!down_interruptible(&fepriv->sem))
 631                                 semheld = true;
 632                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 633                         break;
 634                 }
 635
 636                 if (try_to_freeze())
 637                         goto restart;
 638
 639                 if (down_interruptible(&fepriv->sem))
 640                         break;
 641
 642                 if (fepriv->reinitialise) {
 643                         dvb_frontend_init(fe);
 644                         if (fe->ops.set_tone && fepriv->tone != -1)
 645                                 fe->ops.set_tone(fe, fepriv->tone);
 646                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 647                                 fe->ops.set_voltage(fe, fepriv->voltage);
 648                         fepriv->reinitialise = 0;
 649                 }
 650
 651                 /* do an iteration of the tuning loop */
 652                 if (fe->ops.get_frontend_algo) {
 653                         algo = fe->ops.get_frontend_algo(fe);
 654                         switch (algo) {
 655                         case DVBFE_ALGO_HW:
 656                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 657
 658                                 if (fepriv->state & FESTATE_RETUNE) {
 659                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 660                                         re_tune = true;
 661                                         fepriv->state = FESTATE_TUNED;
 662                                 } else {
 663                                         re_tune = false;
 664                                 }
 665
 666                                 if (fe->ops.tune)
 667                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 668
 669                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 670                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 671                                         dvb_frontend_add_event(fe, s);
 672                                         fepriv->status = s;
 673                                 }
 674                                 break;
 675                         case DVBFE_ALGO_SW:
 676                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 677                                 dvb_frontend_swzigzag(fe);
 678                                 break;
 679                         case DVBFE_ALGO_CUSTOM:
 680                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 681                                 if (fepriv->state & FESTATE_RETUNE) {
 682                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 683                                         fepriv->state = FESTATE_TUNED;
 684                                 }
 685                                 /* Case where we are going to search for a carrier
 686                                  * User asked us to retune again for some reason, possibly
 687                                  * requesting a search with a new set of parameters
 688                                  */
 689                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 690                                         if (fe->ops.search) {
 691                                                 fepriv->algo_status = fe->ops.search(fe);
 692                                                 /* We did do a search as was requested, the flags are
 693                                                  * now unset as well and has the flags wrt to search.
 694                                                  */
 695                                         } else {
 696                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 697                                         }
 698                                 }
 699                                 /* Track the carrier if the search was successful */
 700                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 701                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 702                                         fepriv->delay = HZ / 2;
 703                                 }
 704                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
 705                                 fe->ops.read_status(fe, &s);
 706                                 if (s != fepriv->status) {
 707                                         dvb_frontend_add_event(fe, s); /* update event list */
 708                                         fepriv->status = s;
 709                                         if (!(s & FE_HAS_LOCK)) {
 710                                                 fepriv->delay = HZ / 10;
 711                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 712                                         } else {
 713                                                 fepriv->delay = 60 * HZ;
 714                                         }
 715                                 }
 716                                 break;
 717                         default:
 718                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 719                                 break;
 720                         }
 721                 } else {
 722                         dvb_frontend_swzigzag(fe);
 723                 }
 724         }
 725
 726         if (dvb_powerdown_on_sleep) {
 727                 if (fe->ops.set_voltage)
 728                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 729                 if (fe->ops.tuner_ops.sleep) {
 730                         if (fe->ops.i2c_gate_ctrl)
 731                                 fe->ops.i2c_gate_ctrl(fe, 1);
 732                         fe->ops.tuner_ops.sleep(fe);
 733                         if (fe->ops.i2c_gate_ctrl)
 734                                 fe->ops.i2c_gate_ctrl(fe, 0);
 735                 }
 736                 if (fe->ops.sleep)
 737                         fe->ops.sleep(fe);
 738         }
 739
 740         fepriv->thread = NULL;
 741         if (kthread_should_stop())
 742                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 743         else
 744                 fepriv->exit = DVB_FE_NO_EXIT;
 745         mb();
 746
 747         if (semheld)
 748                 up(&fepriv->sem);
 749         dvb_frontend_wakeup(fe);
 750         return 0;
 751 }
 752
 753 static void dvb_frontend_stop(struct dvb_frontend *fe)
 754 {
 755         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 756
 757         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 758
 759         fepriv->exit = DVB_FE_NORMAL_EXIT;
 760         mb();
 761
 762         if (!fepriv->thread)
 763                 return;
 764
 765         kthread_stop(fepriv->thread);
 766
 767         sema_init(&fepriv->sem, 1);
 768         fepriv->state = FESTATE_IDLE;
 769
 770         /* paranoia check in case a signal arrived */
 771         if (fepriv->thread)
 772                 dev_warn(fe->dvb->device,
 773                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 774                                 fepriv->thread);
 775 }
 776
 777 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 778 {
 779         return ((curtime.tv_usec < lasttime.tv_usec) ?
 780                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 781                 curtime.tv_usec - lasttime.tv_usec);
 782 }
 783 EXPORT_SYMBOL(timeval_usec_diff);
 784
 785 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 786 {
 787         curtime->tv_usec += add_usec;
 788         if (curtime->tv_usec >= 1000000) {
 789                 curtime->tv_usec -= 1000000;
 790                 curtime->tv_sec++;
 791         }
 792 }
 793
 794 /*
 795  * Sleep until gettimeofday() > waketime + add_usec
 796  * This needs to be as precise as possible, but as the delay is
 797  * usually between 2ms and 32ms, it is done using a scheduled msleep
 798  * followed by usleep (normally a busy-wait loop) for the remainder
 799  */
 800 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 801 {
 802         struct timeval lasttime;
 803         s32 delta, newdelta;
 804
 805         timeval_usec_add(waketime, add_usec);
 806
 807         do_gettimeofday(&lasttime);
 808         delta = timeval_usec_diff(lasttime, *waketime);
 809         if (delta > 2500) {
 810                 msleep((delta - 1500) / 1000);
 811                 do_gettimeofday(&lasttime);
 812                 newdelta = timeval_usec_diff(lasttime, *waketime);
 813                 delta = (newdelta > delta) ? 0 : newdelta;
 814         }
 815         if (delta > 0)
 816                 udelay(delta);
 817 }
 818 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 819
 820 static int dvb_frontend_start(struct dvb_frontend *fe)
 821 {
 822         int ret;
 823         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 824         struct task_struct *fe_thread;
 825
 826         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 827
 828         if (fepriv->thread) {
 829                 if (fepriv->exit == DVB_FE_NO_EXIT)
 830                         return 0;
 831                 else
 832                         dvb_frontend_stop (fe);
 833         }
 834
 835         if (signal_pending(current))
 836                 return -EINTR;
 837         if (down_interruptible (&fepriv->sem))
 838                 return -EINTR;
 839
 840         fepriv->state = FESTATE_IDLE;
 841         fepriv->exit = DVB_FE_NO_EXIT;
 842         fepriv->thread = NULL;
 843         mb();
 844
 845         fe_thread = kthread_run(dvb_frontend_thread, fe,
 846                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 847         if (IS_ERR(fe_thread)) {
 848                 ret = PTR_ERR(fe_thread);
 849                 dev_warn(fe->dvb->device,
 850                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 851                                 ret);
 852                 up(&fepriv->sem);
 853                 return ret;
 854         }
 855         fepriv->thread = fe_thread;
 856         return 0;
 857 }
 858
 859 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 860                                         u32 *freq_min, u32 *freq_max)
 861 {
 862         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 863
 864         if (fe->ops.info.frequency_max == 0)
 865                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 866         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 867                 *freq_max = fe->ops.info.frequency_max;
 868         else
 869                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 870
 871         if (*freq_min == 0 || *freq_max == 0)
 872                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 873                                 fe->dvb->num, fe->id);
 874 }
 875
 876 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 877 {
 878         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 879         u32 freq_min;
 880         u32 freq_max;
 881
 882         /* range check: frequency */
 883         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 884         if ((freq_min && c->frequency < freq_min) ||
 885             (freq_max && c->frequency > freq_max)) {
 886                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 887                                 fe->dvb->num, fe->id, c->frequency,
 888                                 freq_min, freq_max);
 889                 return -EINVAL;
 890         }
 891
 892         /* range check: symbol rate */
 893         switch (c->delivery_system) {
 894         case SYS_DVBS:
 895         case SYS_DVBS2:
 896         case SYS_TURBO:
 897         case SYS_DVBC_ANNEX_A:
 898         case SYS_DVBC_ANNEX_C:
 899                 if ((fe->ops.info.symbol_rate_min &&
 900                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 901                     (fe->ops.info.symbol_rate_max &&
 902                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 903                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 904                                         fe->dvb->num, fe->id, c->symbol_rate,
 905                                         fe->ops.info.symbol_rate_min,
 906                                         fe->ops.info.symbol_rate_max);
 907                         return -EINVAL;
 908                 }
 909         default:
 910                 break;
 911         }
 912
 913         return 0;
 914 }
 915
 916 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 917 {
 918         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 919         int i;
 920         u32 delsys;
 921
 922         delsys = c->delivery_system;
 923         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
 924         c->delivery_system = delsys;
 925
 926         c->state = DTV_CLEAR;
 927
 928         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
 929                         __func__, c->delivery_system);
 930
 931         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 932         c->bandwidth_hz = 0;    /* AUTO */
 933         c->guard_interval = GUARD_INTERVAL_AUTO;
 934         c->hierarchy = HIERARCHY_AUTO;
 935         c->symbol_rate = 0;
 936         c->code_rate_HP = FEC_AUTO;
 937         c->code_rate_LP = FEC_AUTO;
 938         c->fec_inner = FEC_AUTO;
 939         c->rolloff = ROLLOFF_AUTO;
 940         c->voltage = SEC_VOLTAGE_OFF;
 941         c->sectone = SEC_TONE_OFF;
 942         c->pilot = PILOT_AUTO;
 943
 944         c->isdbt_partial_reception = 0;
 945         c->isdbt_sb_mode = 0;
 946         c->isdbt_sb_subchannel = 0;
 947         c->isdbt_sb_segment_idx = 0;
 948         c->isdbt_sb_segment_count = 0;
 949         c->isdbt_layer_enabled = 0;
 950         for (i = 0; i < 3; i++) {
 951                 c->layer[i].fec = FEC_AUTO;
 952                 c->layer[i].modulation = QAM_AUTO;
 953                 c->layer[i].interleaving = 0;
 954                 c->layer[i].segment_count = 0;
 955         }
 956
 957         c->stream_id = NO_STREAM_ID_FILTER;
 958
 959         switch (c->delivery_system) {
 960         case SYS_DVBS:
 961         case SYS_DVBS2:
 962         case SYS_TURBO:
 963                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 964                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 965                 break;
 966         case SYS_ATSC:
 967                 c->modulation = VSB_8;
 968                 break;
 969         default:
 970                 c->modulation = QAM_AUTO;
 971                 break;
 972         }
 973
 974         c->lna = LNA_AUTO;
 975
 976         return 0;
 977 }
 978
 979 #define _DTV_CMD(n, s, b) \
 980 [n] = { \
 981         .name = #n, \
 982         .cmd  = n, \
 983         .set  = s,\
 984         .buffer = b \
 985 }
 986
 987 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 988         _DTV_CMD(DTV_TUNE, 1, 0),
 989         _DTV_CMD(DTV_CLEAR, 1, 0),
 990
 991         /* Set */
 992         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 993         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 994         _DTV_CMD(DTV_MODULATION, 1, 0),
 995         _DTV_CMD(DTV_INVERSION, 1, 0),
 996         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 997         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 998         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 999         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1000         _DTV_CMD(DTV_TONE, 1, 0),
1001         _DTV_CMD(DTV_PILOT, 1, 0),
1002         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1003         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1004         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1005         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1006         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1007         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1008         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1009         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1010
1011         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1012         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1013         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1014         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1015         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1016         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1017         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1018         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1019         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1020         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1021         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1022         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1023         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1024         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1025         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1026         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1027         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1028         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1029
1030         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1031         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1032         _DTV_CMD(DTV_LNA, 1, 0),
1033
1034         /* Get */
1035         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1036         _DTV_CMD(DTV_API_VERSION, 0, 0),
1037
1038         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1039
1040         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1041         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1042
1043         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1044         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1045         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1046         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1047         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1048         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1049         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1050         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1051         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1052         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1053         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1054         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1055         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1056
1057         /* Statistics API */
1058         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1059         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1060         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1061         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1062         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1063         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1064         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1065         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1066 };
1067
1068 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1069 {
1070         int i;
1071
1072         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1073                 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1074                                 __func__, tvp->cmd);
1075                 return;
1076         }
1077
1078         dev_dbg(fe->dvb->device, "%s: tvp.cmd    = 0x%08x (%s)\n", __func__,
1079                         tvp->cmd, dtv_cmds[tvp->cmd].name);
1080
1081         if (dtv_cmds[tvp->cmd].buffer) {
1082                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1083                         __func__, tvp->u.buffer.len);
1084
1085                 for(i = 0; i < tvp->u.buffer.len; i++)
1086                         dev_dbg(fe->dvb->device,
1087                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1088                                         __func__, i, tvp->u.buffer.data[i]);
1089         } else {
1090                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1091                                 tvp->u.data);
1092         }
1093 }
1094
1095 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1096  * drivers can use a single set_frontend tuning function, regardless of whether
1097  * it's being used for the legacy or new API, reducing code and complexity.
1098  */
1099 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1100                                    struct dtv_frontend_properties *c,
1101                                    const struct dvb_frontend_parameters *p)
1102 {
1103         c->frequency = p->frequency;
1104         c->inversion = p->inversion;
1105
1106         switch (dvbv3_type(c->delivery_system)) {
1107         case DVBV3_QPSK:
1108                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1109                 c->symbol_rate = p->u.qpsk.symbol_rate;
1110                 c->fec_inner = p->u.qpsk.fec_inner;
1111                 break;
1112         case DVBV3_QAM:
1113                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1114                 c->symbol_rate = p->u.qam.symbol_rate;
1115                 c->fec_inner = p->u.qam.fec_inner;
1116                 c->modulation = p->u.qam.modulation;
1117                 break;
1118         case DVBV3_OFDM:
1119                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1120
1121                 switch (p->u.ofdm.bandwidth) {
1122                 case BANDWIDTH_10_MHZ:
1123                         c->bandwidth_hz = 10000000;
1124                         break;
1125                 case BANDWIDTH_8_MHZ:
1126                         c->bandwidth_hz = 8000000;
1127                         break;
1128                 case BANDWIDTH_7_MHZ:
1129                         c->bandwidth_hz = 7000000;
1130                         break;
1131                 case BANDWIDTH_6_MHZ:
1132                         c->bandwidth_hz = 6000000;
1133                         break;
1134                 case BANDWIDTH_5_MHZ:
1135                         c->bandwidth_hz = 5000000;
1136                         break;
1137                 case BANDWIDTH_1_712_MHZ:
1138                         c->bandwidth_hz = 1712000;
1139                         break;
1140                 case BANDWIDTH_AUTO:
1141                         c->bandwidth_hz = 0;
1142                 }
1143
1144                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1145                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1146                 c->modulation = p->u.ofdm.constellation;
1147                 c->transmission_mode = p->u.ofdm.transmission_mode;
1148                 c->guard_interval = p->u.ofdm.guard_interval;
1149                 c->hierarchy = p->u.ofdm.hierarchy_information;
1150                 break;
1151         case DVBV3_ATSC:
1152                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1153                 c->modulation = p->u.vsb.modulation;
1154                 if (c->delivery_system == SYS_ATSCMH)
1155                         break;
1156                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1157                         c->delivery_system = SYS_ATSC;
1158                 else
1159                         c->delivery_system = SYS_DVBC_ANNEX_B;
1160                 break;
1161         case DVBV3_UNKNOWN:
1162                 dev_err(fe->dvb->device,
1163                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1164                                 __func__, c->delivery_system);
1165                 return -EINVAL;
1166         }
1167
1168         return 0;
1169 }
1170
1171 /* Ensure the cached values are set correctly in the frontend
1172  * legacy tuning structures, for the advanced tuning API.
1173  */
1174 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1175                                             struct dvb_frontend_parameters *p)
1176 {
1177         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1178
1179         p->frequency = c->frequency;
1180         p->inversion = c->inversion;
1181
1182         switch (dvbv3_type(c->delivery_system)) {
1183         case DVBV3_UNKNOWN:
1184                 dev_err(fe->dvb->device,
1185                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1186                                 __func__, c->delivery_system);
1187                 return -EINVAL;
1188         case DVBV3_QPSK:
1189                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1190                 p->u.qpsk.symbol_rate = c->symbol_rate;
1191                 p->u.qpsk.fec_inner = c->fec_inner;
1192                 break;
1193         case DVBV3_QAM:
1194                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1195                 p->u.qam.symbol_rate = c->symbol_rate;
1196                 p->u.qam.fec_inner = c->fec_inner;
1197                 p->u.qam.modulation = c->modulation;
1198                 break;
1199         case DVBV3_OFDM:
1200                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1201                 switch (c->bandwidth_hz) {
1202                 case 10000000:
1203                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1204                         break;
1205                 case 8000000:
1206                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1207                         break;
1208                 case 7000000:
1209                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1210                         break;
1211                 case 6000000:
1212                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1213                         break;
1214                 case 5000000:
1215                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1216                         break;
1217                 case 1712000:
1218                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1219                         break;
1220                 case 0:
1221                 default:
1222                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1223                 }
1224                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1225                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1226                 p->u.ofdm.constellation = c->modulation;
1227                 p->u.ofdm.transmission_mode = c->transmission_mode;
1228                 p->u.ofdm.guard_interval = c->guard_interval;
1229                 p->u.ofdm.hierarchy_information = c->hierarchy;
1230                 break;
1231         case DVBV3_ATSC:
1232                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1233                 p->u.vsb.modulation = c->modulation;
1234                 break;
1235         }
1236         return 0;
1237 }
1238
1239 /**
1240  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1241  * @fe:         struct dvb_frontend pointer
1242  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1243  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1244  *
1245  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1246  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1247  * If p_out is not null, it will update the DVBv3 params pointed by it.
1248  */
1249 static int dtv_get_frontend(struct dvb_frontend *fe,
1250                             struct dvb_frontend_parameters *p_out)
1251 {
1252         int r;
1253
1254         if (fe->ops.get_frontend) {
1255                 r = fe->ops.get_frontend(fe);
1256                 if (unlikely(r < 0))
1257                         return r;
1258                 if (p_out)
1259                         dtv_property_legacy_params_sync(fe, p_out);
1260                 return 0;
1261         }
1262
1263         /* As everything is in cache, get_frontend fops are always supported */
1264         return 0;
1265 }
1266
1267 static int dvb_frontend_ioctl_legacy(struct file *file,
1268                         unsigned int cmd, void *parg);
1269 static int dvb_frontend_ioctl_properties(struct file *file,
1270                         unsigned int cmd, void *parg);
1271
1272 static int dtv_property_process_get(struct dvb_frontend *fe,
1273                                     const struct dtv_frontend_properties *c,
1274                                     struct dtv_property *tvp,
1275                                     struct file *file)
1276 {
1277         int r, ncaps;
1278
1279         switch(tvp->cmd) {
1280         case DTV_ENUM_DELSYS:
1281                 ncaps = 0;
1282                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1283                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1284                         ncaps++;
1285                 }
1286                 tvp->u.buffer.len = ncaps;
1287                 break;
1288         case DTV_FREQUENCY:
1289                 tvp->u.data = c->frequency;
1290                 break;
1291         case DTV_MODULATION:
1292                 tvp->u.data = c->modulation;
1293                 break;
1294         case DTV_BANDWIDTH_HZ:
1295                 tvp->u.data = c->bandwidth_hz;
1296                 break;
1297         case DTV_INVERSION:
1298                 tvp->u.data = c->inversion;
1299                 break;
1300         case DTV_SYMBOL_RATE:
1301                 tvp->u.data = c->symbol_rate;
1302                 break;
1303         case DTV_INNER_FEC:
1304                 tvp->u.data = c->fec_inner;
1305                 break;
1306         case DTV_PILOT:
1307                 tvp->u.data = c->pilot;
1308                 break;
1309         case DTV_ROLLOFF:
1310                 tvp->u.data = c->rolloff;
1311                 break;
1312         case DTV_DELIVERY_SYSTEM:
1313                 tvp->u.data = c->delivery_system;
1314                 break;
1315         case DTV_VOLTAGE:
1316                 tvp->u.data = c->voltage;
1317                 break;
1318         case DTV_TONE:
1319                 tvp->u.data = c->sectone;
1320                 break;
1321         case DTV_API_VERSION:
1322                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1323                 break;
1324         case DTV_CODE_RATE_HP:
1325                 tvp->u.data = c->code_rate_HP;
1326                 break;
1327         case DTV_CODE_RATE_LP:
1328                 tvp->u.data = c->code_rate_LP;
1329                 break;
1330         case DTV_GUARD_INTERVAL:
1331                 tvp->u.data = c->guard_interval;
1332                 break;
1333         case DTV_TRANSMISSION_MODE:
1334                 tvp->u.data = c->transmission_mode;
1335                 break;
1336         case DTV_HIERARCHY:
1337                 tvp->u.data = c->hierarchy;
1338                 break;
1339         case DTV_INTERLEAVING:
1340                 tvp->u.data = c->interleaving;
1341                 break;
1342
1343         /* ISDB-T Support here */
1344         case DTV_ISDBT_PARTIAL_RECEPTION:
1345                 tvp->u.data = c->isdbt_partial_reception;
1346                 break;
1347         case DTV_ISDBT_SOUND_BROADCASTING:
1348                 tvp->u.data = c->isdbt_sb_mode;
1349                 break;
1350         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1351                 tvp->u.data = c->isdbt_sb_subchannel;
1352                 break;
1353         case DTV_ISDBT_SB_SEGMENT_IDX:
1354                 tvp->u.data = c->isdbt_sb_segment_idx;
1355                 break;
1356         case DTV_ISDBT_SB_SEGMENT_COUNT:
1357                 tvp->u.data = c->isdbt_sb_segment_count;
1358                 break;
1359         case DTV_ISDBT_LAYER_ENABLED:
1360                 tvp->u.data = c->isdbt_layer_enabled;
1361                 break;
1362         case DTV_ISDBT_LAYERA_FEC:
1363                 tvp->u.data = c->layer[0].fec;
1364                 break;
1365         case DTV_ISDBT_LAYERA_MODULATION:
1366                 tvp->u.data = c->layer[0].modulation;
1367                 break;
1368         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1369                 tvp->u.data = c->layer[0].segment_count;
1370                 break;
1371         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1372                 tvp->u.data = c->layer[0].interleaving;
1373                 break;
1374         case DTV_ISDBT_LAYERB_FEC:
1375                 tvp->u.data = c->layer[1].fec;
1376                 break;
1377         case DTV_ISDBT_LAYERB_MODULATION:
1378                 tvp->u.data = c->layer[1].modulation;
1379                 break;
1380         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1381                 tvp->u.data = c->layer[1].segment_count;
1382                 break;
1383         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1384                 tvp->u.data = c->layer[1].interleaving;
1385                 break;
1386         case DTV_ISDBT_LAYERC_FEC:
1387                 tvp->u.data = c->layer[2].fec;
1388                 break;
1389         case DTV_ISDBT_LAYERC_MODULATION:
1390                 tvp->u.data = c->layer[2].modulation;
1391                 break;
1392         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1393                 tvp->u.data = c->layer[2].segment_count;
1394                 break;
1395         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1396                 tvp->u.data = c->layer[2].interleaving;
1397                 break;
1398
1399         /* Multistream support */
1400         case DTV_STREAM_ID:
1401         case DTV_DVBT2_PLP_ID_LEGACY:
1402                 tvp->u.data = c->stream_id;
1403                 break;
1404
1405         /* ATSC-MH */
1406         case DTV_ATSCMH_FIC_VER:
1407                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1408                 break;
1409         case DTV_ATSCMH_PARADE_ID:
1410                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1411                 break;
1412         case DTV_ATSCMH_NOG:
1413                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1414                 break;
1415         case DTV_ATSCMH_TNOG:
1416                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1417                 break;
1418         case DTV_ATSCMH_SGN:
1419                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1420                 break;
1421         case DTV_ATSCMH_PRC:
1422                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1423                 break;
1424         case DTV_ATSCMH_RS_FRAME_MODE:
1425                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1426                 break;
1427         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1428                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1429                 break;
1430         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1431                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1432                 break;
1433         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1434                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1435                 break;
1436         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1437                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1438                 break;
1439         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1440                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1441                 break;
1442         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1443                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1444                 break;
1445         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1446                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1447                 break;
1448         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1449                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1450                 break;
1451
1452         case DTV_LNA:
1453                 tvp->u.data = c->lna;
1454                 break;
1455
1456         /* Fill quality measures */
1457         case DTV_STAT_SIGNAL_STRENGTH:
1458                 tvp->u.st = c->strength;
1459                 break;
1460         case DTV_STAT_CNR:
1461                 tvp->u.st = c->cnr;
1462                 break;
1463         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1464                 tvp->u.st = c->pre_bit_error;
1465                 break;
1466         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1467                 tvp->u.st = c->pre_bit_count;
1468                 break;
1469         case DTV_STAT_POST_ERROR_BIT_COUNT:
1470                 tvp->u.st = c->post_bit_error;
1471                 break;
1472         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1473                 tvp->u.st = c->post_bit_count;
1474                 break;
1475         case DTV_STAT_ERROR_BLOCK_COUNT:
1476                 tvp->u.st = c->block_error;
1477                 break;
1478         case DTV_STAT_TOTAL_BLOCK_COUNT:
1479                 tvp->u.st = c->block_count;
1480                 break;
1481         default:
1482                 dev_dbg(fe->dvb->device,
1483                         "%s: FE property %d doesn't exist\n",
1484                         __func__, tvp->cmd);
1485                 return -EINVAL;
1486         }
1487
1488         /* Allow the frontend to override outgoing properties */
1489         if (fe->ops.get_property) {
1490                 r = fe->ops.get_property(fe, tvp);
1491                 if (r < 0)
1492                         return r;
1493         }
1494
1495         dtv_property_dump(fe, tvp);
1496
1497         return 0;
1498 }
1499
1500 static int dtv_set_frontend(struct dvb_frontend *fe);
1501
1502 static bool is_dvbv3_delsys(u32 delsys)
1503 {
1504         bool status;
1505
1506         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1507                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1508
1509         return status;
1510 }
1511
1512 /**
1513  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1514  * @fe:                 struct frontend;
1515  * @delsys:                     DVBv5 type that will be used for emulation
1516  *
1517  * Provides emulation for delivery systems that are compatible with the old
1518  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1519  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1520  * parameters are compatible with DVB-S spec.
1521  */
1522 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1523 {
1524         int i;
1525         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1526
1527         c->delivery_system = delsys;
1528
1529         /*
1530          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1531          */
1532         if (c->delivery_system == SYS_ISDBT) {
1533                 dev_dbg(fe->dvb->device,
1534                         "%s: Using defaults for SYS_ISDBT\n",
1535                         __func__);
1536
1537                 if (!c->bandwidth_hz)
1538                         c->bandwidth_hz = 6000000;
1539
1540                 c->isdbt_partial_reception = 0;
1541                 c->isdbt_sb_mode = 0;
1542                 c->isdbt_sb_subchannel = 0;
1543                 c->isdbt_sb_segment_idx = 0;
1544                 c->isdbt_sb_segment_count = 0;
1545                 c->isdbt_layer_enabled = 7;
1546                 for (i = 0; i < 3; i++) {
1547                         c->layer[i].fec = FEC_AUTO;
1548                         c->layer[i].modulation = QAM_AUTO;
1549                         c->layer[i].interleaving = 0;
1550                         c->layer[i].segment_count = 0;
1551                 }
1552         }
1553         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1554                 __func__, c->delivery_system);
1555
1556         return 0;
1557 }
1558
1559 /**
1560  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1561  * @fe:                 frontend struct
1562  * @desired_system:     delivery system requested by the user
1563  *
1564  * A DVBv5 call know what's the desired system it wants. So, set it.
1565  *
1566  * There are, however, a few known issues with early DVBv5 applications that
1567  * are also handled by this logic:
1568  *
1569  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1570  *    This is an API violation, but, as we don't want to break userspace,
1571  *    convert it to the first supported delivery system.
1572  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1573  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1574  *    ISDB-T provided backward compat with DVB-T.
1575  */
1576 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1577                                      u32 desired_system)
1578 {
1579         int ncaps;
1580         u32 delsys = SYS_UNDEFINED;
1581         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1582         enum dvbv3_emulation_type type;
1583
1584         /*
1585          * It was reported that some old DVBv5 applications were
1586          * filling delivery_system with SYS_UNDEFINED. If this happens,
1587          * assume that the application wants to use the first supported
1588          * delivery system.
1589          */
1590         if (desired_system == SYS_UNDEFINED)
1591                 desired_system = fe->ops.delsys[0];
1592
1593         /*
1594          * This is a DVBv5 call. So, it likely knows the supported
1595          * delivery systems. So, check if the desired delivery system is
1596          * supported
1597          */
1598         ncaps = 0;
1599         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1600                 if (fe->ops.delsys[ncaps] == desired_system) {
1601                         c->delivery_system = desired_system;
1602                         dev_dbg(fe->dvb->device,
1603                                         "%s: Changing delivery system to %d\n",
1604                                         __func__, desired_system);
1605                         return 0;
1606                 }
1607                 ncaps++;
1608         }
1609
1610         /*
1611          * The requested delivery system isn't supported. Maybe userspace
1612          * is requesting a DVBv3 compatible delivery system.
1613          *
1614          * The emulation only works if the desired system is one of the
1615          * delivery systems supported by DVBv3 API
1616          */
1617         if (!is_dvbv3_delsys(desired_system)) {
1618                 dev_dbg(fe->dvb->device,
1619                         "%s: Delivery system %d not supported.\n",
1620                         __func__, desired_system);
1621                 return -EINVAL;
1622         }
1623
1624         type = dvbv3_type(desired_system);
1625
1626         /*
1627         * Get the last non-DVBv3 delivery system that has the same type
1628         * of the desired system
1629         */
1630         ncaps = 0;
1631         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1632                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1633                         delsys = fe->ops.delsys[ncaps];
1634                 ncaps++;
1635         }
1636
1637         /* There's nothing compatible with the desired delivery system */
1638         if (delsys == SYS_UNDEFINED) {
1639                 dev_dbg(fe->dvb->device,
1640                         "%s: Delivery system %d not supported on emulation mode.\n",
1641                         __func__, desired_system);
1642                 return -EINVAL;
1643         }
1644
1645         dev_dbg(fe->dvb->device,
1646                 "%s: Using delivery system %d emulated as if it were %d\n",
1647                 __func__, delsys, desired_system);
1648
1649         return emulate_delivery_system(fe, desired_system);
1650 }
1651
1652 /**
1653  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1654  * @fe: frontend struct
1655  *
1656  * A DVBv3 call doesn't know what's the desired system it wants. It also
1657  * doesn't allow to switch between different types. Due to that, userspace
1658  * should use DVBv5 instead.
1659  * However, in order to avoid breaking userspace API, limited backward
1660  * compatibility support is provided.
1661  *
1662  * There are some delivery systems that are incompatible with DVBv3 calls.
1663  *
1664  * This routine should work fine for frontends that support just one delivery
1665  * system.
1666  *
1667  * For frontends that support multiple frontends:
1668  * 1) It defaults to use the first supported delivery system. There's an
1669  *    userspace application that allows changing it at runtime;
1670  *
1671  * 2) If the current delivery system is not compatible with DVBv3, it gets
1672  *    the first one that it is compatible.
1673  *
1674  * NOTE: in order for this to work with applications like Kaffeine that
1675  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1676  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1677  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1678  *      to DVB-S.
1679  */
1680 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1681 {
1682         int ncaps;
1683         u32 delsys = SYS_UNDEFINED;
1684         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1685
1686         /* If not set yet, defaults to the first supported delivery system */
1687         if (c->delivery_system == SYS_UNDEFINED)
1688                 c->delivery_system = fe->ops.delsys[0];
1689
1690         /*
1691          * Trivial case: just use the current one, if it already a DVBv3
1692          * delivery system
1693          */
1694         if (is_dvbv3_delsys(c->delivery_system)) {
1695                 dev_dbg(fe->dvb->device,
1696                                 "%s: Using delivery system to %d\n",
1697                                 __func__, c->delivery_system);
1698                 return 0;
1699         }
1700
1701         /*
1702          * Seek for the first delivery system that it is compatible with a
1703          * DVBv3 standard
1704          */
1705         ncaps = 0;
1706         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1707                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1708                         delsys = fe->ops.delsys[ncaps];
1709                         break;
1710                 }
1711                 ncaps++;
1712         }
1713         if (delsys == SYS_UNDEFINED) {
1714                 dev_dbg(fe->dvb->device,
1715                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1716                         __func__);
1717                 return -EINVAL;
1718         }
1719         return emulate_delivery_system(fe, delsys);
1720 }
1721
1722 static int dtv_property_process_set(struct dvb_frontend *fe,
1723                                     struct dtv_property *tvp,
1724                                     struct file *file)
1725 {
1726         int r = 0;
1727         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1728
1729         /* Allow the frontend to validate incoming properties */
1730         if (fe->ops.set_property) {
1731                 r = fe->ops.set_property(fe, tvp);
1732                 if (r < 0)
1733                         return r;
1734         }
1735
1736         switch(tvp->cmd) {
1737         case DTV_CLEAR:
1738                 /*
1739                  * Reset a cache of data specific to the frontend here. This does
1740                  * not effect hardware.
1741                  */
1742                 dvb_frontend_clear_cache(fe);
1743                 break;
1744         case DTV_TUNE:
1745                 /* interpret the cache of data, build either a traditional frontend
1746                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1747                  * ioctl.
1748                  */
1749                 c->state = tvp->cmd;
1750                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1751                                 __func__);
1752
1753                 r = dtv_set_frontend(fe);
1754                 break;
1755         case DTV_FREQUENCY:
1756                 c->frequency = tvp->u.data;
1757                 break;
1758         case DTV_MODULATION:
1759                 c->modulation = tvp->u.data;
1760                 break;
1761         case DTV_BANDWIDTH_HZ:
1762                 c->bandwidth_hz = tvp->u.data;
1763                 break;
1764         case DTV_INVERSION:
1765                 c->inversion = tvp->u.data;
1766                 break;
1767         case DTV_SYMBOL_RATE:
1768                 c->symbol_rate = tvp->u.data;
1769                 break;
1770         case DTV_INNER_FEC:
1771                 c->fec_inner = tvp->u.data;
1772                 break;
1773         case DTV_PILOT:
1774                 c->pilot = tvp->u.data;
1775                 break;
1776         case DTV_ROLLOFF:
1777                 c->rolloff = tvp->u.data;
1778                 break;
1779         case DTV_DELIVERY_SYSTEM:
1780                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1781                 break;
1782         case DTV_VOLTAGE:
1783                 c->voltage = tvp->u.data;
1784                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1785                         (void *)c->voltage);
1786                 break;
1787         case DTV_TONE:
1788                 c->sectone = tvp->u.data;
1789                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1790                         (void *)c->sectone);
1791                 break;
1792         case DTV_CODE_RATE_HP:
1793                 c->code_rate_HP = tvp->u.data;
1794                 break;
1795         case DTV_CODE_RATE_LP:
1796                 c->code_rate_LP = tvp->u.data;
1797                 break;
1798         case DTV_GUARD_INTERVAL:
1799                 c->guard_interval = tvp->u.data;
1800                 break;
1801         case DTV_TRANSMISSION_MODE:
1802                 c->transmission_mode = tvp->u.data;
1803                 break;
1804         case DTV_HIERARCHY:
1805                 c->hierarchy = tvp->u.data;
1806                 break;
1807         case DTV_INTERLEAVING:
1808                 c->interleaving = tvp->u.data;
1809                 break;
1810
1811         /* ISDB-T Support here */
1812         case DTV_ISDBT_PARTIAL_RECEPTION:
1813                 c->isdbt_partial_reception = tvp->u.data;
1814                 break;
1815         case DTV_ISDBT_SOUND_BROADCASTING:
1816                 c->isdbt_sb_mode = tvp->u.data;
1817                 break;
1818         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1819                 c->isdbt_sb_subchannel = tvp->u.data;
1820                 break;
1821         case DTV_ISDBT_SB_SEGMENT_IDX:
1822                 c->isdbt_sb_segment_idx = tvp->u.data;
1823                 break;
1824         case DTV_ISDBT_SB_SEGMENT_COUNT:
1825                 c->isdbt_sb_segment_count = tvp->u.data;
1826                 break;
1827         case DTV_ISDBT_LAYER_ENABLED:
1828                 c->isdbt_layer_enabled = tvp->u.data;
1829                 break;
1830         case DTV_ISDBT_LAYERA_FEC:
1831                 c->layer[0].fec = tvp->u.data;
1832                 break;
1833         case DTV_ISDBT_LAYERA_MODULATION:
1834                 c->layer[0].modulation = tvp->u.data;
1835                 break;
1836         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1837                 c->layer[0].segment_count = tvp->u.data;
1838                 break;
1839         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1840                 c->layer[0].interleaving = tvp->u.data;
1841                 break;
1842         case DTV_ISDBT_LAYERB_FEC:
1843                 c->layer[1].fec = tvp->u.data;
1844                 break;
1845         case DTV_ISDBT_LAYERB_MODULATION:
1846                 c->layer[1].modulation = tvp->u.data;
1847                 break;
1848         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1849                 c->layer[1].segment_count = tvp->u.data;
1850                 break;
1851         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1852                 c->layer[1].interleaving = tvp->u.data;
1853                 break;
1854         case DTV_ISDBT_LAYERC_FEC:
1855                 c->layer[2].fec = tvp->u.data;
1856                 break;
1857         case DTV_ISDBT_LAYERC_MODULATION:
1858                 c->layer[2].modulation = tvp->u.data;
1859                 break;
1860         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1861                 c->layer[2].segment_count = tvp->u.data;
1862                 break;
1863         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1864                 c->layer[2].interleaving = tvp->u.data;
1865                 break;
1866
1867         /* Multistream support */
1868         case DTV_STREAM_ID:
1869         case DTV_DVBT2_PLP_ID_LEGACY:
1870                 c->stream_id = tvp->u.data;
1871                 break;
1872
1873         /* ATSC-MH */
1874         case DTV_ATSCMH_PARADE_ID:
1875                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1876                 break;
1877         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1878                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1879                 break;
1880
1881         case DTV_LNA:
1882                 c->lna = tvp->u.data;
1883                 if (fe->ops.set_lna)
1884                         r = fe->ops.set_lna(fe);
1885                 if (r < 0)
1886                         c->lna = LNA_AUTO;
1887                 break;
1888
1889         default:
1890                 return -EINVAL;
1891         }
1892
1893         return r;
1894 }
1895
1896 static int dvb_frontend_ioctl(struct file *file,
1897                         unsigned int cmd, void *parg)
1898 {
1899         struct dvb_device *dvbdev = file->private_data;
1900         struct dvb_frontend *fe = dvbdev->priv;
1901         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1902         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1903         int err = -EOPNOTSUPP;
1904
1905         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1906         if (down_interruptible(&fepriv->sem))
1907                 return -ERESTARTSYS;
1908
1909         if (fepriv->exit != DVB_FE_NO_EXIT) {
1910                 up(&fepriv->sem);
1911                 return -ENODEV;
1912         }
1913
1914         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1915             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1916              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1917                 up(&fepriv->sem);
1918                 return -EPERM;
1919         }
1920
1921         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1922                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1923         else {
1924                 c->state = DTV_UNDEFINED;
1925                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1926         }
1927
1928         up(&fepriv->sem);
1929         return err;
1930 }
1931
1932 static int dvb_frontend_ioctl_properties(struct file *file,
1933                         unsigned int cmd, void *parg)
1934 {
1935         struct dvb_device *dvbdev = file->private_data;
1936         struct dvb_frontend *fe = dvbdev->priv;
1937         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1938         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1939         int err = 0;
1940
1941         struct dtv_properties *tvps = NULL;
1942         struct dtv_property *tvp = NULL;
1943         int i;
1944
1945         dev_dbg(fe->dvb->device, "%s:\n", __func__);
1946
1947         if(cmd == FE_SET_PROPERTY) {
1948                 tvps = (struct dtv_properties __user *)parg;
1949
1950                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1951                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1952
1953                 /* Put an arbitrary limit on the number of messages that can
1954                  * be sent at once */
1955                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1956                         return -EINVAL;
1957
1958                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1959                 if (!tvp) {
1960                         err = -ENOMEM;
1961                         goto out;
1962                 }
1963
1964                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1965                         err = -EFAULT;
1966                         goto out;
1967                 }
1968
1969                 for (i = 0; i < tvps->num; i++) {
1970                         err = dtv_property_process_set(fe, tvp + i, file);
1971                         if (err < 0)
1972                                 goto out;
1973                         (tvp + i)->result = err;
1974                 }
1975
1976                 if (c->state == DTV_TUNE)
1977                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1978
1979         } else
1980         if(cmd == FE_GET_PROPERTY) {
1981                 tvps = (struct dtv_properties __user *)parg;
1982
1983                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1984                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1985
1986                 /* Put an arbitrary limit on the number of messages that can
1987                  * be sent at once */
1988                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1989                         return -EINVAL;
1990
1991                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1992                 if (!tvp) {
1993                         err = -ENOMEM;
1994                         goto out;
1995                 }
1996
1997                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1998                         err = -EFAULT;
1999                         goto out;
2000                 }
2001
2002                 /*
2003                  * Fills the cache out struct with the cache contents, plus
2004                  * the data retrieved from get_frontend, if the frontend
2005                  * is not idle. Otherwise, returns the cached content
2006                  */
2007                 if (fepriv->state != FESTATE_IDLE) {
2008                         err = dtv_get_frontend(fe, NULL);
2009                         if (err < 0)
2010                                 goto out;
2011                 }
2012                 for (i = 0; i < tvps->num; i++) {
2013                         err = dtv_property_process_get(fe, c, tvp + i, file);
2014                         if (err < 0)
2015                                 goto out;
2016                         (tvp + i)->result = err;
2017                 }
2018
2019                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
2020                         err = -EFAULT;
2021                         goto out;
2022                 }
2023
2024         } else
2025                 err = -EOPNOTSUPP;
2026
2027 out:
2028         kfree(tvp);
2029         return err;
2030 }
2031
2032 static int dtv_set_frontend(struct dvb_frontend *fe)
2033 {
2034         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2035         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2036         struct dvb_frontend_tune_settings fetunesettings;
2037         u32 rolloff = 0;
2038
2039         if (dvb_frontend_check_parameters(fe) < 0)
2040                 return -EINVAL;
2041
2042         /*
2043          * Initialize output parameters to match the values given by
2044          * the user. FE_SET_FRONTEND triggers an initial frontend event
2045          * with status = 0, which copies output parameters to userspace.
2046          */
2047         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2048
2049         /*
2050          * Be sure that the bandwidth will be filled for all
2051          * non-satellite systems, as tuners need to know what
2052          * low pass/Nyquist half filter should be applied, in
2053          * order to avoid inter-channel noise.
2054          *
2055          * ISDB-T and DVB-T/T2 already sets bandwidth.
2056          * ATSC and DVB-C don't set, so, the core should fill it.
2057          *
2058          * On DVB-C Annex A and C, the bandwidth is a function of
2059          * the roll-off and symbol rate. Annex B defines different
2060          * roll-off factors depending on the modulation. Fortunately,
2061          * Annex B is only used with 6MHz, so there's no need to
2062          * calculate it.
2063          *
2064          * While not officially supported, a side effect of handling it at
2065          * the cache level is that a program could retrieve the bandwidth
2066          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2067          */
2068         switch (c->delivery_system) {
2069         case SYS_ATSC:
2070         case SYS_DVBC_ANNEX_B:
2071                 c->bandwidth_hz = 6000000;
2072                 break;
2073         case SYS_DVBC_ANNEX_A:
2074                 rolloff = 115;
2075                 break;
2076         case SYS_DVBC_ANNEX_C:
2077                 rolloff = 113;
2078                 break;
2079         default:
2080                 break;
2081         }
2082         if (rolloff)
2083                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
2084
2085         /* force auto frequency inversion if requested */
2086         if (dvb_force_auto_inversion)
2087                 c->inversion = INVERSION_AUTO;
2088
2089         /*
2090          * without hierarchical coding code_rate_LP is irrelevant,
2091          * so we tolerate the otherwise invalid FEC_NONE setting
2092          */
2093         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2094                 c->code_rate_LP = FEC_AUTO;
2095
2096         /* get frontend-specific tuning settings */
2097         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2098         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2099                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2100                 fepriv->max_drift = fetunesettings.max_drift;
2101                 fepriv->step_size = fetunesettings.step_size;
2102         } else {
2103                 /* default values */
2104                 switch (c->delivery_system) {
2105                 case SYS_DVBS:
2106                 case SYS_DVBS2:
2107                 case SYS_ISDBS:
2108                 case SYS_TURBO:
2109                 case SYS_DVBC_ANNEX_A:
2110                 case SYS_DVBC_ANNEX_C:
2111                         fepriv->min_delay = HZ / 20;
2112                         fepriv->step_size = c->symbol_rate / 16000;
2113                         fepriv->max_drift = c->symbol_rate / 2000;
2114                         break;
2115                 case SYS_DVBT:
2116                 case SYS_DVBT2:
2117                 case SYS_ISDBT:
2118                 case SYS_DTMB:
2119                         fepriv->min_delay = HZ / 20;
2120                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2121                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2122                         break;
2123                 default:
2124                         /*
2125                          * FIXME: This sounds wrong! if freqency_stepsize is
2126                          * defined by the frontend, why not use it???
2127                          */
2128                         fepriv->min_delay = HZ / 20;
2129                         fepriv->step_size = 0; /* no zigzag */
2130                         fepriv->max_drift = 0;
2131                         break;
2132                 }
2133         }
2134         if (dvb_override_tune_delay > 0)
2135                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2136
2137         fepriv->state = FESTATE_RETUNE;
2138
2139         /* Request the search algorithm to search */
2140         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2141
2142         dvb_frontend_clear_events(fe);
2143         dvb_frontend_add_event(fe, 0);
2144         dvb_frontend_wakeup(fe);
2145         fepriv->status = 0;
2146
2147         return 0;
2148 }
2149
2150
2151 static int dvb_frontend_ioctl_legacy(struct file *file,
2152                         unsigned int cmd, void *parg)
2153 {
2154         struct dvb_device *dvbdev = file->private_data;
2155         struct dvb_frontend *fe = dvbdev->priv;
2156         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2157         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2158         int err = -EOPNOTSUPP;
2159
2160         switch (cmd) {
2161         case FE_GET_INFO: {
2162                 struct dvb_frontend_info* info = parg;
2163
2164                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2165                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2166
2167                 /*
2168                  * Associate the 4 delivery systems supported by DVBv3
2169                  * API with their DVBv5 counterpart. For the other standards,
2170                  * use the closest type, assuming that it would hopefully
2171                  * work with a DVBv3 application.
2172                  * It should be noticed that, on multi-frontend devices with
2173                  * different types (terrestrial and cable, for example),
2174                  * a pure DVBv3 application won't be able to use all delivery
2175                  * systems. Yet, changing the DVBv5 cache to the other delivery
2176                  * system should be enough for making it work.
2177                  */
2178                 switch (dvbv3_type(c->delivery_system)) {
2179                 case DVBV3_QPSK:
2180                         info->type = FE_QPSK;
2181                         break;
2182                 case DVBV3_ATSC:
2183                         info->type = FE_ATSC;
2184                         break;
2185                 case DVBV3_QAM:
2186                         info->type = FE_QAM;
2187                         break;
2188                 case DVBV3_OFDM:
2189                         info->type = FE_OFDM;
2190                         break;
2191                 default:
2192                         dev_err(fe->dvb->device,
2193                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2194                                         __func__, c->delivery_system);
2195                         fe->ops.info.type = FE_OFDM;
2196                 }
2197                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2198                                  __func__, c->delivery_system, fe->ops.info.type);
2199
2200                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2201                  * do it, it is done for it. */
2202                 info->caps |= FE_CAN_INVERSION_AUTO;
2203                 err = 0;
2204                 break;
2205         }
2206
2207         case FE_READ_STATUS: {
2208                 fe_status_t* status = parg;
2209
2210                 /* if retune was requested but hasn't occurred yet, prevent
2211                  * that user get signal state from previous tuning */
2212                 if (fepriv->state == FESTATE_RETUNE ||
2213                     fepriv->state == FESTATE_ERROR) {
2214                         err=0;
2215                         *status = 0;
2216                         break;
2217                 }
2218
2219                 if (fe->ops.read_status)
2220                         err = fe->ops.read_status(fe, status);
2221                 break;
2222         }
2223
2224         case FE_READ_BER:
2225                 if (fe->ops.read_ber) {
2226                         if (fepriv->thread)
2227                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2228                         else
2229                                 err = -EAGAIN;
2230                 }
2231                 break;
2232
2233         case FE_READ_SIGNAL_STRENGTH:
2234                 if (fe->ops.read_signal_strength) {
2235                         if (fepriv->thread)
2236                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2237                         else
2238                                 err = -EAGAIN;
2239                 }
2240                 break;
2241
2242         case FE_READ_SNR:
2243                 if (fe->ops.read_snr) {
2244                         if (fepriv->thread)
2245                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2246                         else
2247                                 err = -EAGAIN;
2248                 }
2249                 break;
2250
2251         case FE_READ_UNCORRECTED_BLOCKS:
2252                 if (fe->ops.read_ucblocks) {
2253                         if (fepriv->thread)
2254                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2255                         else
2256                                 err = -EAGAIN;
2257                 }
2258                 break;
2259
2260         case FE_DISEQC_RESET_OVERLOAD:
2261                 if (fe->ops.diseqc_reset_overload) {
2262                         err = fe->ops.diseqc_reset_overload(fe);
2263                         fepriv->state = FESTATE_DISEQC;
2264                         fepriv->status = 0;
2265                 }
2266                 break;
2267
2268         case FE_DISEQC_SEND_MASTER_CMD:
2269                 if (fe->ops.diseqc_send_master_cmd) {
2270                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2271                         fepriv->state = FESTATE_DISEQC;
2272                         fepriv->status = 0;
2273                 }
2274                 break;
2275
2276         case FE_DISEQC_SEND_BURST:
2277                 if (fe->ops.diseqc_send_burst) {
2278                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2279                         fepriv->state = FESTATE_DISEQC;
2280                         fepriv->status = 0;
2281                 }
2282                 break;
2283
2284         case FE_SET_TONE:
2285                 if (fe->ops.set_tone) {
2286                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2287                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2288                         fepriv->state = FESTATE_DISEQC;
2289                         fepriv->status = 0;
2290                 }
2291                 break;
2292
2293         case FE_SET_VOLTAGE:
2294                 if (fe->ops.set_voltage) {
2295                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2296                         fepriv->voltage = (fe_sec_voltage_t) parg;
2297                         fepriv->state = FESTATE_DISEQC;
2298                         fepriv->status = 0;
2299                 }
2300                 break;
2301
2302         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2303                 if (fe->ops.dishnetwork_send_legacy_command) {
2304                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2305                         fepriv->state = FESTATE_DISEQC;
2306                         fepriv->status = 0;
2307                 } else if (fe->ops.set_voltage) {
2308                         /*
2309                          * NOTE: This is a fallback condition.  Some frontends
2310                          * (stv0299 for instance) take longer than 8msec to
2311                          * respond to a set_voltage command.  Those switches
2312                          * need custom routines to switch properly.  For all
2313                          * other frontends, the following should work ok.
2314                          * Dish network legacy switches (as used by Dish500)
2315                          * are controlled by sending 9-bit command words
2316                          * spaced 8msec apart.
2317                          * the actual command word is switch/port dependent
2318                          * so it is up to the userspace application to send
2319                          * the right command.
2320                          * The command must always start with a '0' after
2321                          * initialization, so parg is 8 bits and does not
2322                          * include the initialization or start bit
2323                          */
2324                         unsigned long swcmd = ((unsigned long) parg) << 1;
2325                         struct timeval nexttime;
2326                         struct timeval tv[10];
2327                         int i;
2328                         u8 last = 1;
2329                         if (dvb_frontend_debug)
2330                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2331                         do_gettimeofday(&nexttime);
2332                         if (dvb_frontend_debug)
2333                                 tv[0] = nexttime;
2334                         /* before sending a command, initialize by sending
2335                          * a 32ms 18V to the switch
2336                          */
2337                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2338                         dvb_frontend_sleep_until(&nexttime, 32000);
2339
2340                         for (i = 0; i < 9; i++) {
2341                                 if (dvb_frontend_debug)
2342                                         do_gettimeofday(&tv[i + 1]);
2343                                 if ((swcmd & 0x01) != last) {
2344                                         /* set voltage to (last ? 13V : 18V) */
2345                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2346                                         last = (last) ? 0 : 1;
2347                                 }
2348                                 swcmd = swcmd >> 1;
2349                                 if (i != 8)
2350                                         dvb_frontend_sleep_until(&nexttime, 8000);
2351                         }
2352                         if (dvb_frontend_debug) {
2353                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2354                                         __func__, fe->dvb->num);
2355                                 for (i = 1; i < 10; i++)
2356                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2357                         }
2358                         err = 0;
2359                         fepriv->state = FESTATE_DISEQC;
2360                         fepriv->status = 0;
2361                 }
2362                 break;
2363
2364         case FE_DISEQC_RECV_SLAVE_REPLY:
2365                 if (fe->ops.diseqc_recv_slave_reply)
2366                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2367                 break;
2368
2369         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2370                 if (fe->ops.enable_high_lnb_voltage)
2371                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2372                 break;
2373
2374         case FE_SET_FRONTEND:
2375                 err = dvbv3_set_delivery_system(fe);
2376                 if (err)
2377                         break;
2378
2379                 err = dtv_property_cache_sync(fe, c, parg);
2380                 if (err)
2381                         break;
2382                 err = dtv_set_frontend(fe);
2383                 break;
2384         case FE_GET_EVENT:
2385                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2386                 break;
2387
2388         case FE_GET_FRONTEND:
2389                 err = dtv_get_frontend(fe, parg);
2390                 break;
2391
2392         case FE_SET_FRONTEND_TUNE_MODE:
2393                 fepriv->tune_mode_flags = (unsigned long) parg;
2394                 err = 0;
2395                 break;
2396         }
2397
2398         return err;
2399 }
2400
2401
2402 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2403 {
2404         struct dvb_device *dvbdev = file->private_data;
2405         struct dvb_frontend *fe = dvbdev->priv;
2406         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2407
2408         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2409
2410         poll_wait (file, &fepriv->events.wait_queue, wait);
2411
2412         if (fepriv->events.eventw != fepriv->events.eventr)
2413                 return (POLLIN | POLLRDNORM | POLLPRI);
2414
2415         return 0;
2416 }
2417
2418 static int dvb_frontend_open(struct inode *inode, struct file *file)
2419 {
2420         struct dvb_device *dvbdev = file->private_data;
2421         struct dvb_frontend *fe = dvbdev->priv;
2422         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2423         struct dvb_adapter *adapter = fe->dvb;
2424         int ret;
2425
2426         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2427         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2428                 return -ENODEV;
2429
2430         if (adapter->mfe_shared) {
2431                 mutex_lock (&adapter->mfe_lock);
2432
2433                 if (adapter->mfe_dvbdev == NULL)
2434                         adapter->mfe_dvbdev = dvbdev;
2435
2436                 else if (adapter->mfe_dvbdev != dvbdev) {
2437                         struct dvb_device
2438                                 *mfedev = adapter->mfe_dvbdev;
2439                         struct dvb_frontend
2440                                 *mfe = mfedev->priv;
2441                         struct dvb_frontend_private
2442                                 *mfepriv = mfe->frontend_priv;
2443                         int mferetry = (dvb_mfe_wait_time << 1);
2444
2445                         mutex_unlock (&adapter->mfe_lock);
2446                         while (mferetry-- && (mfedev->users != -1 ||
2447                                         mfepriv->thread != NULL)) {
2448                                 if(msleep_interruptible(500)) {
2449                                         if(signal_pending(current))
2450                                                 return -EINTR;
2451                                 }
2452                         }
2453
2454                         mutex_lock (&adapter->mfe_lock);
2455                         if(adapter->mfe_dvbdev != dvbdev) {
2456                                 mfedev = adapter->mfe_dvbdev;
2457                                 mfe = mfedev->priv;
2458                                 mfepriv = mfe->frontend_priv;
2459                                 if (mfedev->users != -1 ||
2460                                                 mfepriv->thread != NULL) {
2461                                         mutex_unlock (&adapter->mfe_lock);
2462                                         return -EBUSY;
2463                                 }
2464                                 adapter->mfe_dvbdev = dvbdev;
2465                         }
2466                 }
2467         }
2468
2469         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2470                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2471                         goto err0;
2472
2473                 /* If we took control of the bus, we need to force
2474                    reinitialization.  This is because many ts_bus_ctrl()
2475                    functions strobe the RESET pin on the demod, and if the
2476                    frontend thread already exists then the dvb_init() routine
2477                    won't get called (which is what usually does initial
2478                    register configuration). */
2479                 fepriv->reinitialise = 1;
2480         }
2481
2482         if ((ret = dvb_generic_open (inode, file)) < 0)
2483                 goto err1;
2484
2485         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2486                 /* normal tune mode when opened R/W */
2487                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2488                 fepriv->tone = -1;
2489                 fepriv->voltage = -1;
2490
2491                 ret = dvb_frontend_start (fe);
2492                 if (ret)
2493                         goto err2;
2494
2495                 /*  empty event queue */
2496                 fepriv->events.eventr = fepriv->events.eventw = 0;
2497         }
2498
2499         if (adapter->mfe_shared)
2500                 mutex_unlock (&adapter->mfe_lock);
2501         return ret;
2502
2503 err2:
2504         dvb_generic_release(inode, file);
2505 err1:
2506         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2507                 fe->ops.ts_bus_ctrl(fe, 0);
2508 err0:
2509         if (adapter->mfe_shared)
2510                 mutex_unlock (&adapter->mfe_lock);
2511         return ret;
2512 }
2513
2514 static int dvb_frontend_release(struct inode *inode, struct file *file)
2515 {
2516         struct dvb_device *dvbdev = file->private_data;
2517         struct dvb_frontend *fe = dvbdev->priv;
2518         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2519         int ret;
2520
2521         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2522
2523         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2524                 fepriv->release_jiffies = jiffies;
2525                 mb();
2526         }
2527
2528         ret = dvb_generic_release (inode, file);
2529
2530         if (dvbdev->users == -1) {
2531                 wake_up(&fepriv->wait_queue);
2532                 if (fepriv->exit != DVB_FE_NO_EXIT)
2533                         wake_up(&dvbdev->wait_queue);
2534                 if (fe->ops.ts_bus_ctrl)
2535                         fe->ops.ts_bus_ctrl(fe, 0);
2536         }
2537
2538         return ret;
2539 }
2540
2541 static const struct file_operations dvb_frontend_fops = {
2542         .owner          = THIS_MODULE,
2543         .unlocked_ioctl = dvb_generic_ioctl,
2544         .poll           = dvb_frontend_poll,
2545         .open           = dvb_frontend_open,
2546         .release        = dvb_frontend_release,
2547         .llseek         = noop_llseek,
2548 };
2549
2550 int dvb_frontend_suspend(struct dvb_frontend *fe)
2551 {
2552         int ret = 0;
2553
2554         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2555                         fe->id);
2556
2557         if (fe->ops.tuner_ops.sleep)
2558                 ret = fe->ops.tuner_ops.sleep(fe);
2559
2560         if (fe->ops.sleep)
2561                 ret = fe->ops.sleep(fe);
2562
2563         return ret;
2564 }
2565 EXPORT_SYMBOL(dvb_frontend_suspend);
2566
2567 int dvb_frontend_resume(struct dvb_frontend *fe)
2568 {
2569         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2570         int ret = 0;
2571
2572         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2573                         fe->id);
2574
2575         if (fe->ops.init)
2576                 ret = fe->ops.init(fe);
2577
2578         if (fe->ops.tuner_ops.init)
2579                 ret = fe->ops.tuner_ops.init(fe);
2580
2581         fepriv->state = FESTATE_RETUNE;
2582         dvb_frontend_wakeup(fe);
2583
2584         return ret;
2585 }
2586 EXPORT_SYMBOL(dvb_frontend_resume);
2587
2588 int dvb_register_frontend(struct dvb_adapter* dvb,
2589                           struct dvb_frontend* fe)
2590 {
2591         struct dvb_frontend_private *fepriv;
2592         static const struct dvb_device dvbdev_template = {
2593                 .users = ~0,
2594                 .writers = 1,
2595                 .readers = (~0)-1,
2596                 .fops = &dvb_frontend_fops,
2597                 .kernel_ioctl = dvb_frontend_ioctl
2598         };
2599
2600         dev_dbg(dvb->device, "%s:\n", __func__);
2601
2602         if (mutex_lock_interruptible(&frontend_mutex))
2603                 return -ERESTARTSYS;
2604
2605         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2606         if (fe->frontend_priv == NULL) {
2607                 mutex_unlock(&frontend_mutex);
2608                 return -ENOMEM;
2609         }
2610         fepriv = fe->frontend_priv;
2611
2612         sema_init(&fepriv->sem, 1);
2613         init_waitqueue_head (&fepriv->wait_queue);
2614         init_waitqueue_head (&fepriv->events.wait_queue);
2615         mutex_init(&fepriv->events.mtx);
2616         fe->dvb = dvb;
2617         fepriv->inversion = INVERSION_OFF;
2618
2619         dev_info(fe->dvb->device,
2620                         "DVB: registering adapter %i frontend %i (%s)...\n",
2621                         fe->dvb->num, fe->id, fe->ops.info.name);
2622
2623         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2624                              fe, DVB_DEVICE_FRONTEND);
2625
2626         /*
2627          * Initialize the cache to the proper values according with the
2628          * first supported delivery system (ops->delsys[0])
2629          */
2630
2631         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2632         dvb_frontend_clear_cache(fe);
2633
2634         mutex_unlock(&frontend_mutex);
2635         return 0;
2636 }
2637 EXPORT_SYMBOL(dvb_register_frontend);
2638
2639 int dvb_unregister_frontend(struct dvb_frontend* fe)
2640 {
2641         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2642         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2643
2644         mutex_lock(&frontend_mutex);
2645         dvb_frontend_stop (fe);
2646         mutex_unlock(&frontend_mutex);
2647
2648         if (fepriv->dvbdev->users < -1)
2649                 wait_event(fepriv->dvbdev->wait_queue,
2650                                 fepriv->dvbdev->users==-1);
2651
2652         mutex_lock(&frontend_mutex);
2653         dvb_unregister_device (fepriv->dvbdev);
2654
2655         /* fe is invalid now */
2656         kfree(fepriv);
2657         mutex_unlock(&frontend_mutex);
2658         return 0;
2659 }
2660 EXPORT_SYMBOL(dvb_unregister_frontend);
2661
2662 #ifdef CONFIG_MEDIA_ATTACH
2663 void dvb_frontend_detach(struct dvb_frontend* fe)
2664 {
2665         void *ptr;
2666
2667         if (fe->ops.release_sec) {
2668                 fe->ops.release_sec(fe);
2669                 symbol_put_addr(fe->ops.release_sec);
2670         }
2671         if (fe->ops.tuner_ops.release) {
2672                 fe->ops.tuner_ops.release(fe);
2673                 symbol_put_addr(fe->ops.tuner_ops.release);
2674         }
2675         if (fe->ops.analog_ops.release) {
2676                 fe->ops.analog_ops.release(fe);
2677                 symbol_put_addr(fe->ops.analog_ops.release);
2678         }
2679         ptr = (void*)fe->ops.release;
2680         if (ptr) {
2681                 fe->ops.release(fe);
2682                 symbol_put_addr(ptr);
2683         }
2684 }
2685 #else
2686 void dvb_frontend_detach(struct dvb_frontend* fe)
2687 {
2688         if (fe->ops.release_sec)
2689                 fe->ops.release_sec(fe);
2690         if (fe->ops.tuner_ops.release)
2691                 fe->ops.tuner_ops.release(fe);
2692         if (fe->ops.analog_ops.release)
2693                 fe->ops.analog_ops.release(fe);
2694         if (fe->ops.release)
2695                 fe->ops.release(fe);
2696 }
2697 #endif
2698 EXPORT_SYMBOL(dvb_frontend_detach);