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 <linux/ktime.h>
  44 #include <asm/processor.h>
  45
  46 #include "dvb_frontend.h"
  47 #include "dvbdev.h"
  48 #include <linux/dvb/version.h>
  49
  50 static int dvb_frontend_debug;
  51 static int dvb_shutdown_timeout;
  52 static int dvb_force_auto_inversion;
  53 static int dvb_override_tune_delay;
  54 static int dvb_powerdown_on_sleep = 1;
  55 static int dvb_mfe_wait_time = 5;
  56
  57 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  58 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  59 module_param(dvb_shutdown_timeout, int, 0644);
  60 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  61 module_param(dvb_force_auto_inversion, int, 0644);
  62 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  63 module_param(dvb_override_tune_delay, int, 0644);
  64 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  65 module_param(dvb_powerdown_on_sleep, int, 0644);
  66 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  67 module_param(dvb_mfe_wait_time, int, 0644);
  68 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)");
  69
  70 #define FESTATE_IDLE 1
  71 #define FESTATE_RETUNE 2
  72 #define FESTATE_TUNING_FAST 4
  73 #define FESTATE_TUNING_SLOW 8
  74 #define FESTATE_TUNED 16
  75 #define FESTATE_ZIGZAG_FAST 32
  76 #define FESTATE_ZIGZAG_SLOW 64
  77 #define FESTATE_DISEQC 128
  78 #define FESTATE_ERROR 256
  79 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  80 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  81 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  82 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  83
  84 /*
  85  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  86  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  87  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  88  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  89  * FESTATE_TUNED. The frontend has successfully locked on.
  90  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  91  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  92  * FESTATE_DISEQC. A DISEQC command has just been issued.
  93  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  94  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  95  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  96  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  97  */
  98
  99 static DEFINE_MUTEX(frontend_mutex);
 100
 101 struct dvb_frontend_private {
 102         struct kref refcount;
 103
 104         /* thread/frontend values */
 105         struct dvb_device *dvbdev;
 106         struct dvb_frontend_parameters parameters_out;
 107         struct dvb_fe_events events;
 108         struct semaphore sem;
 109         struct list_head list_head;
 110         wait_queue_head_t wait_queue;
 111         struct task_struct *thread;
 112         unsigned long release_jiffies;
 113         unsigned int wakeup;
 114         enum fe_status status;
 115         unsigned long tune_mode_flags;
 116         unsigned int delay;
 117         unsigned int reinitialise;
 118         int tone;
 119         int voltage;
 120
 121         /* swzigzag values */
 122         unsigned int state;
 123         unsigned int bending;
 124         int lnb_drift;
 125         unsigned int inversion;
 126         unsigned int auto_step;
 127         unsigned int auto_sub_step;
 128         unsigned int started_auto_step;
 129         unsigned int min_delay;
 130         unsigned int max_drift;
 131         unsigned int step_size;
 132         int quality;
 133         unsigned int check_wrapped;
 134         enum dvbfe_search algo_status;
 135
 136 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
 137         struct media_pipeline pipe;
 138 #endif
 139 };
 140
 141 static void dvb_frontend_private_free(struct kref *ref)
 142 {
 143         struct dvb_frontend_private *fepriv =
 144                 container_of(ref, struct dvb_frontend_private, refcount);
 145         kfree(fepriv);
 146 }
 147
 148 static void dvb_frontend_private_put(struct dvb_frontend_private *fepriv)
 149 {
 150         kref_put(&fepriv->refcount, dvb_frontend_private_free);
 151 }
 152
 153 static void dvb_frontend_private_get(struct dvb_frontend_private *fepriv)
 154 {
 155         kref_get(&fepriv->refcount);
 156 }
 157
 158 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 159 static int dtv_get_frontend(struct dvb_frontend *fe,
 160                             struct dtv_frontend_properties *c,
 161                             struct dvb_frontend_parameters *p_out);
 162 static int
 163 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 164                                 const struct dtv_frontend_properties *c,
 165                                 struct dvb_frontend_parameters *p);
 166
 167 static bool has_get_frontend(struct dvb_frontend *fe)
 168 {
 169         return fe->ops.get_frontend != NULL;
 170 }
 171
 172 /*
 173  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 174  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 175  * otherwise, a DVBv3 call will fail.
 176  */
 177 enum dvbv3_emulation_type {
 178         DVBV3_UNKNOWN,
 179         DVBV3_QPSK,
 180         DVBV3_QAM,
 181         DVBV3_OFDM,
 182         DVBV3_ATSC,
 183 };
 184
 185 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 186 {
 187         switch (delivery_system) {
 188         case SYS_DVBC_ANNEX_A:
 189         case SYS_DVBC_ANNEX_C:
 190                 return DVBV3_QAM;
 191         case SYS_DVBS:
 192         case SYS_DVBS2:
 193         case SYS_TURBO:
 194         case SYS_ISDBS:
 195         case SYS_DSS:
 196                 return DVBV3_QPSK;
 197         case SYS_DVBT:
 198         case SYS_DVBT2:
 199         case SYS_ISDBT:
 200         case SYS_DTMB:
 201                 return DVBV3_OFDM;
 202         case SYS_ATSC:
 203         case SYS_ATSCMH:
 204         case SYS_DVBC_ANNEX_B:
 205                 return DVBV3_ATSC;
 206         case SYS_UNDEFINED:
 207         case SYS_ISDBC:
 208         case SYS_DVBH:
 209         case SYS_DAB:
 210         default:
 211                 /*
 212                  * Doesn't know how to emulate those types and/or
 213                  * there's no frontend driver from this type yet
 214                  * with some emulation code, so, we're not sure yet how
 215                  * to handle them, or they're not compatible with a DVBv3 call.
 216                  */
 217                 return DVBV3_UNKNOWN;
 218         }
 219 }
 220
 221 static void dvb_frontend_add_event(struct dvb_frontend *fe,
 222                                    enum fe_status status)
 223 {
 224         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 225         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 226         struct dvb_fe_events *events = &fepriv->events;
 227         struct dvb_frontend_event *e;
 228         int wp;
 229
 230         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 231
 232         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 233                 dtv_get_frontend(fe, c, &fepriv->parameters_out);
 234
 235         mutex_lock(&events->mtx);
 236
 237         wp = (events->eventw + 1) % MAX_EVENT;
 238         if (wp == events->eventr) {
 239                 events->overflow = 1;
 240                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 241         }
 242
 243         e = &events->events[events->eventw];
 244         e->status = status;
 245         e->parameters = fepriv->parameters_out;
 246
 247         events->eventw = wp;
 248
 249         mutex_unlock(&events->mtx);
 250
 251         wake_up_interruptible (&events->wait_queue);
 252 }
 253
 254 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 255                             struct dvb_frontend_event *event, int flags)
 256 {
 257         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 258         struct dvb_fe_events *events = &fepriv->events;
 259
 260         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 261
 262         if (events->overflow) {
 263                 events->overflow = 0;
 264                 return -EOVERFLOW;
 265         }
 266
 267         if (events->eventw == events->eventr) {
 268                 int ret;
 269
 270                 if (flags & O_NONBLOCK)
 271                         return -EWOULDBLOCK;
 272
 273                 up(&fepriv->sem);
 274
 275                 ret = wait_event_interruptible (events->wait_queue,
 276                                                 events->eventw != events->eventr);
 277
 278                 if (down_interruptible (&fepriv->sem))
 279                         return -ERESTARTSYS;
 280
 281                 if (ret < 0)
 282                         return ret;
 283         }
 284
 285         mutex_lock(&events->mtx);
 286         *event = events->events[events->eventr];
 287         events->eventr = (events->eventr + 1) % MAX_EVENT;
 288         mutex_unlock(&events->mtx);
 289
 290         return 0;
 291 }
 292
 293 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 294 {
 295         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 296         struct dvb_fe_events *events = &fepriv->events;
 297
 298         mutex_lock(&events->mtx);
 299         events->eventr = events->eventw;
 300         mutex_unlock(&events->mtx);
 301 }
 302
 303 static void dvb_frontend_init(struct dvb_frontend *fe)
 304 {
 305         dev_dbg(fe->dvb->device,
 306                         "%s: initialising adapter %i frontend %i (%s)...\n",
 307                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 308
 309         if (fe->ops.init)
 310                 fe->ops.init(fe);
 311         if (fe->ops.tuner_ops.init) {
 312                 if (fe->ops.i2c_gate_ctrl)
 313                         fe->ops.i2c_gate_ctrl(fe, 1);
 314                 fe->ops.tuner_ops.init(fe);
 315                 if (fe->ops.i2c_gate_ctrl)
 316                         fe->ops.i2c_gate_ctrl(fe, 0);
 317         }
 318 }
 319
 320 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 321 {
 322         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 323
 324         fepriv->reinitialise = 1;
 325         dvb_frontend_wakeup(fe);
 326 }
 327 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 328
 329 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 330 {
 331         int q2;
 332         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 333
 334         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 335
 336         if (locked)
 337                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 338         else
 339                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 340
 341         q2 = fepriv->quality - 128;
 342         q2 *= q2;
 343
 344         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 345 }
 346
 347 /**
 348  * Performs automatic twiddling of frontend parameters.
 349  *
 350  * @param fe The frontend concerned.
 351  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 352  * @returns Number of complete iterations that have been performed.
 353  */
 354 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 355 {
 356         int autoinversion;
 357         int ready = 0;
 358         int fe_set_err = 0;
 359         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 360         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 361         int original_inversion = c->inversion;
 362         u32 original_frequency = c->frequency;
 363
 364         /* are we using autoinversion? */
 365         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 366                          (c->inversion == INVERSION_AUTO));
 367
 368         /* setup parameters correctly */
 369         while(!ready) {
 370                 /* calculate the lnb_drift */
 371                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 372
 373                 /* wrap the auto_step if we've exceeded the maximum drift */
 374                 if (fepriv->lnb_drift > fepriv->max_drift) {
 375                         fepriv->auto_step = 0;
 376                         fepriv->auto_sub_step = 0;
 377                         fepriv->lnb_drift = 0;
 378                 }
 379
 380                 /* perform inversion and +/- zigzag */
 381                 switch(fepriv->auto_sub_step) {
 382                 case 0:
 383                         /* try with the current inversion and current drift setting */
 384                         ready = 1;
 385                         break;
 386
 387                 case 1:
 388                         if (!autoinversion) break;
 389
 390                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 391                         ready = 1;
 392                         break;
 393
 394                 case 2:
 395                         if (fepriv->lnb_drift == 0) break;
 396
 397                         fepriv->lnb_drift = -fepriv->lnb_drift;
 398                         ready = 1;
 399                         break;
 400
 401                 case 3:
 402                         if (fepriv->lnb_drift == 0) break;
 403                         if (!autoinversion) break;
 404
 405                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 406                         fepriv->lnb_drift = -fepriv->lnb_drift;
 407                         ready = 1;
 408                         break;
 409
 410                 default:
 411                         fepriv->auto_step++;
 412                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 413                         break;
 414                 }
 415
 416                 if (!ready) fepriv->auto_sub_step++;
 417         }
 418
 419         /* if this attempt would hit where we started, indicate a complete
 420          * iteration has occurred */
 421         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 422             (fepriv->auto_sub_step == 0) && check_wrapped) {
 423                 return 1;
 424         }
 425
 426         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 427                         "auto_sub_step:%i started_auto_step:%i\n",
 428                         __func__, fepriv->lnb_drift, fepriv->inversion,
 429                         fepriv->auto_step, fepriv->auto_sub_step,
 430                         fepriv->started_auto_step);
 431
 432         /* set the frontend itself */
 433         c->frequency += fepriv->lnb_drift;
 434         if (autoinversion)
 435                 c->inversion = fepriv->inversion;
 436         tmp = *c;
 437         if (fe->ops.set_frontend)
 438                 fe_set_err = fe->ops.set_frontend(fe);
 439         *c = tmp;
 440         if (fe_set_err < 0) {
 441                 fepriv->state = FESTATE_ERROR;
 442                 return fe_set_err;
 443         }
 444
 445         c->frequency = original_frequency;
 446         c->inversion = original_inversion;
 447
 448         fepriv->auto_sub_step++;
 449         return 0;
 450 }
 451
 452 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 453 {
 454         enum fe_status s = 0;
 455         int retval = 0;
 456         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 457         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 458
 459         /* if we've got no parameters, just keep idling */
 460         if (fepriv->state & FESTATE_IDLE) {
 461                 fepriv->delay = 3*HZ;
 462                 fepriv->quality = 0;
 463                 return;
 464         }
 465
 466         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 467         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 468                 if (fepriv->state & FESTATE_RETUNE) {
 469                         tmp = *c;
 470                         if (fe->ops.set_frontend)
 471                                 retval = fe->ops.set_frontend(fe);
 472                         *c = tmp;
 473                         if (retval < 0)
 474                                 fepriv->state = FESTATE_ERROR;
 475                         else
 476                                 fepriv->state = FESTATE_TUNED;
 477                 }
 478                 fepriv->delay = 3*HZ;
 479                 fepriv->quality = 0;
 480                 return;
 481         }
 482
 483         /* get the frontend status */
 484         if (fepriv->state & FESTATE_RETUNE) {
 485                 s = 0;
 486         } else {
 487                 if (fe->ops.read_status)
 488                         fe->ops.read_status(fe, &s);
 489                 if (s != fepriv->status) {
 490                         dvb_frontend_add_event(fe, s);
 491                         fepriv->status = s;
 492                 }
 493         }
 494
 495         /* if we're not tuned, and we have a lock, move to the TUNED state */
 496         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 497                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 498                 fepriv->state = FESTATE_TUNED;
 499
 500                 /* if we're tuned, then we have determined the correct inversion */
 501                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 502                     (c->inversion == INVERSION_AUTO)) {
 503                         c->inversion = fepriv->inversion;
 504                 }
 505                 return;
 506         }
 507
 508         /* if we are tuned already, check we're still locked */
 509         if (fepriv->state & FESTATE_TUNED) {
 510                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 511
 512                 /* we're tuned, and the lock is still good... */
 513                 if (s & FE_HAS_LOCK) {
 514                         return;
 515                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 516                         fepriv->state = FESTATE_ZIGZAG_FAST;
 517                         fepriv->started_auto_step = fepriv->auto_step;
 518                         fepriv->check_wrapped = 0;
 519                 }
 520         }
 521
 522         /* don't actually do anything if we're in the LOSTLOCK state,
 523          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 524         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 525             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 526                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 527                 return;
 528         }
 529
 530         /* don't do anything if we're in the DISEQC state, since this
 531          * might be someone with a motorized dish controlled by DISEQC.
 532          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 533         if (fepriv->state & FESTATE_DISEQC) {
 534                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 535                 return;
 536         }
 537
 538         /* if we're in the RETUNE state, set everything up for a brand
 539          * new scan, keeping the current inversion setting, as the next
 540          * tune is _very_ likely to require the same */
 541         if (fepriv->state & FESTATE_RETUNE) {
 542                 fepriv->lnb_drift = 0;
 543                 fepriv->auto_step = 0;
 544                 fepriv->auto_sub_step = 0;
 545                 fepriv->started_auto_step = 0;
 546                 fepriv->check_wrapped = 0;
 547         }
 548
 549         /* fast zigzag. */
 550         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 551                 fepriv->delay = fepriv->min_delay;
 552
 553                 /* perform a tune */
 554                 retval = dvb_frontend_swzigzag_autotune(fe,
 555                                                         fepriv->check_wrapped);
 556                 if (retval < 0) {
 557                         return;
 558                 } else if (retval) {
 559                         /* OK, if we've run out of trials at the fast speed.
 560                          * Drop back to slow for the _next_ attempt */
 561                         fepriv->state = FESTATE_SEARCHING_SLOW;
 562                         fepriv->started_auto_step = fepriv->auto_step;
 563                         return;
 564                 }
 565                 fepriv->check_wrapped = 1;
 566
 567                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 568                  * This ensures we cannot return from an
 569                  * FE_SET_FRONTEND ioctl before the first frontend tune
 570                  * occurs */
 571                 if (fepriv->state & FESTATE_RETUNE) {
 572                         fepriv->state = FESTATE_TUNING_FAST;
 573                 }
 574         }
 575
 576         /* slow zigzag */
 577         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 578                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 579
 580                 /* Note: don't bother checking for wrapping; we stay in this
 581                  * state until we get a lock */
 582                 dvb_frontend_swzigzag_autotune(fe, 0);
 583         }
 584 }
 585
 586 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 587 {
 588         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 589
 590         if (fe->exit != DVB_FE_NO_EXIT)
 591                 return 1;
 592
 593         if (fepriv->dvbdev->writers == 1)
 594                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 595                                   dvb_shutdown_timeout * HZ))
 596                         return 1;
 597
 598         return 0;
 599 }
 600
 601 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 602 {
 603         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 604
 605         if (fepriv->wakeup) {
 606                 fepriv->wakeup = 0;
 607                 return 1;
 608         }
 609         return dvb_frontend_is_exiting(fe);
 610 }
 611
 612 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 613 {
 614         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 615
 616         fepriv->wakeup = 1;
 617         wake_up_interruptible(&fepriv->wait_queue);
 618 }
 619
 620 static int dvb_frontend_thread(void *data)
 621 {
 622         struct dvb_frontend *fe = data;
 623         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 624         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 625         enum fe_status s;
 626         enum dvbfe_algo algo;
 627         bool re_tune = false;
 628         bool semheld = false;
 629
 630         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 631
 632         fepriv->check_wrapped = 0;
 633         fepriv->quality = 0;
 634         fepriv->delay = 3*HZ;
 635         fepriv->status = 0;
 636         fepriv->wakeup = 0;
 637         fepriv->reinitialise = 0;
 638
 639         dvb_frontend_init(fe);
 640
 641         set_freezable();
 642         while (1) {
 643                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 644 restart:
 645                 wait_event_interruptible_timeout(fepriv->wait_queue,
 646                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 647                                 || freezing(current),
 648                         fepriv->delay);
 649
 650                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 651                         /* got signal or quitting */
 652                         if (!down_interruptible(&fepriv->sem))
 653                                 semheld = true;
 654                         fe->exit = DVB_FE_NORMAL_EXIT;
 655                         break;
 656                 }
 657
 658                 if (try_to_freeze())
 659                         goto restart;
 660
 661                 if (down_interruptible(&fepriv->sem))
 662                         break;
 663
 664                 if (fepriv->reinitialise) {
 665                         dvb_frontend_init(fe);
 666                         if (fe->ops.set_tone && fepriv->tone != -1)
 667                                 fe->ops.set_tone(fe, fepriv->tone);
 668                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 669                                 fe->ops.set_voltage(fe, fepriv->voltage);
 670                         fepriv->reinitialise = 0;
 671                 }
 672
 673                 /* do an iteration of the tuning loop */
 674                 if (fe->ops.get_frontend_algo) {
 675                         algo = fe->ops.get_frontend_algo(fe);
 676                         switch (algo) {
 677                         case DVBFE_ALGO_HW:
 678                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 679
 680                                 if (fepriv->state & FESTATE_RETUNE) {
 681                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 682                                         re_tune = true;
 683                                         fepriv->state = FESTATE_TUNED;
 684                                 } else {
 685                                         re_tune = false;
 686                                 }
 687
 688                                 if (fe->ops.tune)
 689                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 690
 691                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 692                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 693                                         dvb_frontend_add_event(fe, s);
 694                                         fepriv->status = s;
 695                                 }
 696                                 break;
 697                         case DVBFE_ALGO_SW:
 698                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 699                                 dvb_frontend_swzigzag(fe);
 700                                 break;
 701                         case DVBFE_ALGO_CUSTOM:
 702                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 703                                 if (fepriv->state & FESTATE_RETUNE) {
 704                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 705                                         fepriv->state = FESTATE_TUNED;
 706                                 }
 707                                 /* Case where we are going to search for a carrier
 708                                  * User asked us to retune again for some reason, possibly
 709                                  * requesting a search with a new set of parameters
 710                                  */
 711                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 712                                         if (fe->ops.search) {
 713                                                 fepriv->algo_status = fe->ops.search(fe);
 714                                                 /* We did do a search as was requested, the flags are
 715                                                  * now unset as well and has the flags wrt to search.
 716                                                  */
 717                                         } else {
 718                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 719                                         }
 720                                 }
 721                                 /* Track the carrier if the search was successful */
 722                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 723                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 724                                         fepriv->delay = HZ / 2;
 725                                 }
 726                                 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
 727                                 fe->ops.read_status(fe, &s);
 728                                 if (s != fepriv->status) {
 729                                         dvb_frontend_add_event(fe, s); /* update event list */
 730                                         fepriv->status = s;
 731                                         if (!(s & FE_HAS_LOCK)) {
 732                                                 fepriv->delay = HZ / 10;
 733                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 734                                         } else {
 735                                                 fepriv->delay = 60 * HZ;
 736                                         }
 737                                 }
 738                                 break;
 739                         default:
 740                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 741                                 break;
 742                         }
 743                 } else {
 744                         dvb_frontend_swzigzag(fe);
 745                 }
 746         }
 747
 748         if (dvb_powerdown_on_sleep) {
 749                 if (fe->ops.set_voltage)
 750                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 751                 if (fe->ops.tuner_ops.sleep) {
 752                         if (fe->ops.i2c_gate_ctrl)
 753                                 fe->ops.i2c_gate_ctrl(fe, 1);
 754                         fe->ops.tuner_ops.sleep(fe);
 755                         if (fe->ops.i2c_gate_ctrl)
 756                                 fe->ops.i2c_gate_ctrl(fe, 0);
 757                 }
 758                 if (fe->ops.sleep)
 759                         fe->ops.sleep(fe);
 760         }
 761
 762         fepriv->thread = NULL;
 763         if (kthread_should_stop())
 764                 fe->exit = DVB_FE_DEVICE_REMOVED;
 765         else
 766                 fe->exit = DVB_FE_NO_EXIT;
 767         mb();
 768
 769         if (semheld)
 770                 up(&fepriv->sem);
 771         dvb_frontend_wakeup(fe);
 772         return 0;
 773 }
 774
 775 static void dvb_frontend_stop(struct dvb_frontend *fe)
 776 {
 777         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 778
 779         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 780
 781         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 782                 fe->exit = DVB_FE_NORMAL_EXIT;
 783         mb();
 784
 785         if (!fepriv->thread)
 786                 return;
 787
 788         kthread_stop(fepriv->thread);
 789
 790         sema_init(&fepriv->sem, 1);
 791         fepriv->state = FESTATE_IDLE;
 792
 793         /* paranoia check in case a signal arrived */
 794         if (fepriv->thread)
 795                 dev_warn(fe->dvb->device,
 796                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 797                                 fepriv->thread);
 798 }
 799
 800 /*
 801  * Sleep for the amount of time given by add_usec parameter
 802  *
 803  * This needs to be as precise as possible, as it affects the detection of
 804  * the dish tone command at the satellite subsystem. The precision is improved
 805  * by using a scheduled msleep followed by udelay for the remainder.
 806  */
 807 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
 808 {
 809         s32 delta;
 810
 811         *waketime = ktime_add_us(*waketime, add_usec);
 812         delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 813         if (delta > 2500) {
 814                 msleep((delta - 1500) / 1000);
 815                 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 816         }
 817         if (delta > 0)
 818                 udelay(delta);
 819 }
 820 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 821
 822 static int dvb_frontend_start(struct dvb_frontend *fe)
 823 {
 824         int ret;
 825         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 826         struct task_struct *fe_thread;
 827
 828         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 829
 830         if (fepriv->thread) {
 831                 if (fe->exit == DVB_FE_NO_EXIT)
 832                         return 0;
 833                 else
 834                         dvb_frontend_stop (fe);
 835         }
 836
 837         if (signal_pending(current))
 838                 return -EINTR;
 839         if (down_interruptible (&fepriv->sem))
 840                 return -EINTR;
 841
 842         fepriv->state = FESTATE_IDLE;
 843         fe->exit = DVB_FE_NO_EXIT;
 844         fepriv->thread = NULL;
 845         mb();
 846
 847         fe_thread = kthread_run(dvb_frontend_thread, fe,
 848                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 849         if (IS_ERR(fe_thread)) {
 850                 ret = PTR_ERR(fe_thread);
 851                 dev_warn(fe->dvb->device,
 852                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 853                                 ret);
 854                 up(&fepriv->sem);
 855                 return ret;
 856         }
 857         fepriv->thread = fe_thread;
 858         return 0;
 859 }
 860
 861 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 862                                         u32 *freq_min, u32 *freq_max)
 863 {
 864         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 865
 866         if (fe->ops.info.frequency_max == 0)
 867                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 868         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 869                 *freq_max = fe->ops.info.frequency_max;
 870         else
 871                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 872
 873         if (*freq_min == 0 || *freq_max == 0)
 874                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 875                                 fe->dvb->num, fe->id);
 876 }
 877
 878 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 879 {
 880         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 881         u32 freq_min;
 882         u32 freq_max;
 883
 884         /* range check: frequency */
 885         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 886         if ((freq_min && c->frequency < freq_min) ||
 887             (freq_max && c->frequency > freq_max)) {
 888                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 889                                 fe->dvb->num, fe->id, c->frequency,
 890                                 freq_min, freq_max);
 891                 return -EINVAL;
 892         }
 893
 894         /* range check: symbol rate */
 895         switch (c->delivery_system) {
 896         case SYS_DVBS:
 897         case SYS_DVBS2:
 898         case SYS_TURBO:
 899         case SYS_DVBC_ANNEX_A:
 900         case SYS_DVBC_ANNEX_C:
 901                 if ((fe->ops.info.symbol_rate_min &&
 902                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 903                     (fe->ops.info.symbol_rate_max &&
 904                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 905                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 906                                         fe->dvb->num, fe->id, c->symbol_rate,
 907                                         fe->ops.info.symbol_rate_min,
 908                                         fe->ops.info.symbol_rate_max);
 909                         return -EINVAL;
 910                 }
 911         default:
 912                 break;
 913         }
 914
 915         return 0;
 916 }
 917
 918 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 919 {
 920         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 921         int i;
 922         u32 delsys;
 923
 924         delsys = c->delivery_system;
 925         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
 926         c->delivery_system = delsys;
 927
 928         c->state = DTV_CLEAR;
 929
 930         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
 931                         __func__, c->delivery_system);
 932
 933         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 934         c->bandwidth_hz = 0;    /* AUTO */
 935         c->guard_interval = GUARD_INTERVAL_AUTO;
 936         c->hierarchy = HIERARCHY_AUTO;
 937         c->symbol_rate = 0;
 938         c->code_rate_HP = FEC_AUTO;
 939         c->code_rate_LP = FEC_AUTO;
 940         c->fec_inner = FEC_AUTO;
 941         c->rolloff = ROLLOFF_AUTO;
 942         c->voltage = SEC_VOLTAGE_OFF;
 943         c->sectone = SEC_TONE_OFF;
 944         c->pilot = PILOT_AUTO;
 945
 946         c->isdbt_partial_reception = 0;
 947         c->isdbt_sb_mode = 0;
 948         c->isdbt_sb_subchannel = 0;
 949         c->isdbt_sb_segment_idx = 0;
 950         c->isdbt_sb_segment_count = 0;
 951         c->isdbt_layer_enabled = 0;
 952         for (i = 0; i < 3; i++) {
 953                 c->layer[i].fec = FEC_AUTO;
 954                 c->layer[i].modulation = QAM_AUTO;
 955                 c->layer[i].interleaving = 0;
 956                 c->layer[i].segment_count = 0;
 957         }
 958
 959         c->stream_id = NO_STREAM_ID_FILTER;
 960
 961         switch (c->delivery_system) {
 962         case SYS_DVBS:
 963         case SYS_DVBS2:
 964         case SYS_TURBO:
 965                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 966                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 967                 break;
 968         case SYS_ATSC:
 969                 c->modulation = VSB_8;
 970                 break;
 971         case SYS_ISDBS:
 972                 c->symbol_rate = 28860000;
 973                 c->rolloff = ROLLOFF_35;
 974                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
 975                 break;
 976         default:
 977                 c->modulation = QAM_AUTO;
 978                 break;
 979         }
 980
 981         c->lna = LNA_AUTO;
 982
 983         return 0;
 984 }
 985
 986 #define _DTV_CMD(n, s, b) \
 987 [n] = { \
 988         .name = #n, \
 989         .cmd  = n, \
 990         .set  = s,\
 991         .buffer = b \
 992 }
 993
 994 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 995         _DTV_CMD(DTV_TUNE, 1, 0),
 996         _DTV_CMD(DTV_CLEAR, 1, 0),
 997
 998         /* Set */
 999         _DTV_CMD(DTV_FREQUENCY, 1, 0),
1000         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1001         _DTV_CMD(DTV_MODULATION, 1, 0),
1002         _DTV_CMD(DTV_INVERSION, 1, 0),
1003         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1004         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1005         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1006         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1007         _DTV_CMD(DTV_TONE, 1, 0),
1008         _DTV_CMD(DTV_PILOT, 1, 0),
1009         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1010         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1011         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1012         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1013         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1014         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1015         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1016         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1017
1018         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1019         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1020         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1021         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1022         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1023         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1024         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1025         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1026         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1027         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1028         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1029         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1030         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1031         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1032         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1033         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1034         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1035         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1036
1037         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1038         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1039         _DTV_CMD(DTV_LNA, 1, 0),
1040
1041         /* Get */
1042         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1043         _DTV_CMD(DTV_API_VERSION, 0, 0),
1044
1045         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1046
1047         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1048         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1049
1050         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1051         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1052         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1053         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1054         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1055         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1056         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1057         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1058         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1059         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1060         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1061         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1062         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1063
1064         /* Statistics API */
1065         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1066         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1067         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1068         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1069         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1070         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1071         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1072         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1073 };
1074
1075 static void dtv_property_dump(struct dvb_frontend *fe,
1076                               bool is_set,
1077                               struct dtv_property *tvp)
1078 {
1079         int i;
1080
1081         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1082                 dev_warn(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x undefined\n",
1083                                 __func__,
1084                                 is_set ? "SET" : "GET",
1085                                 tvp->cmd);
1086                 return;
1087         }
1088
1089         dev_dbg(fe->dvb->device, "%s: %s tvp.cmd    = 0x%08x (%s)\n", __func__,
1090                 is_set ? "SET" : "GET",
1091                 tvp->cmd,
1092                 dtv_cmds[tvp->cmd].name);
1093
1094         if (dtv_cmds[tvp->cmd].buffer) {
1095                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1096                         __func__, tvp->u.buffer.len);
1097
1098                 for(i = 0; i < tvp->u.buffer.len; i++)
1099                         dev_dbg(fe->dvb->device,
1100                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1101                                         __func__, i, tvp->u.buffer.data[i]);
1102         } else {
1103                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1104                                 tvp->u.data);
1105         }
1106 }
1107
1108 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1109  * drivers can use a single set_frontend tuning function, regardless of whether
1110  * it's being used for the legacy or new API, reducing code and complexity.
1111  */
1112 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1113                                    struct dtv_frontend_properties *c,
1114                                    const struct dvb_frontend_parameters *p)
1115 {
1116         c->frequency = p->frequency;
1117         c->inversion = p->inversion;
1118
1119         switch (dvbv3_type(c->delivery_system)) {
1120         case DVBV3_QPSK:
1121                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1122                 c->symbol_rate = p->u.qpsk.symbol_rate;
1123                 c->fec_inner = p->u.qpsk.fec_inner;
1124                 break;
1125         case DVBV3_QAM:
1126                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1127                 c->symbol_rate = p->u.qam.symbol_rate;
1128                 c->fec_inner = p->u.qam.fec_inner;
1129                 c->modulation = p->u.qam.modulation;
1130                 break;
1131         case DVBV3_OFDM:
1132                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1133
1134                 switch (p->u.ofdm.bandwidth) {
1135                 case BANDWIDTH_10_MHZ:
1136                         c->bandwidth_hz = 10000000;
1137                         break;
1138                 case BANDWIDTH_8_MHZ:
1139                         c->bandwidth_hz = 8000000;
1140                         break;
1141                 case BANDWIDTH_7_MHZ:
1142                         c->bandwidth_hz = 7000000;
1143                         break;
1144                 case BANDWIDTH_6_MHZ:
1145                         c->bandwidth_hz = 6000000;
1146                         break;
1147                 case BANDWIDTH_5_MHZ:
1148                         c->bandwidth_hz = 5000000;
1149                         break;
1150                 case BANDWIDTH_1_712_MHZ:
1151                         c->bandwidth_hz = 1712000;
1152                         break;
1153                 case BANDWIDTH_AUTO:
1154                         c->bandwidth_hz = 0;
1155                 }
1156
1157                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1158                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1159                 c->modulation = p->u.ofdm.constellation;
1160                 c->transmission_mode = p->u.ofdm.transmission_mode;
1161                 c->guard_interval = p->u.ofdm.guard_interval;
1162                 c->hierarchy = p->u.ofdm.hierarchy_information;
1163                 break;
1164         case DVBV3_ATSC:
1165                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1166                 c->modulation = p->u.vsb.modulation;
1167                 if (c->delivery_system == SYS_ATSCMH)
1168                         break;
1169                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1170                         c->delivery_system = SYS_ATSC;
1171                 else
1172                         c->delivery_system = SYS_DVBC_ANNEX_B;
1173                 break;
1174         case DVBV3_UNKNOWN:
1175                 dev_err(fe->dvb->device,
1176                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1177                                 __func__, c->delivery_system);
1178                 return -EINVAL;
1179         }
1180
1181         return 0;
1182 }
1183
1184 /* Ensure the cached values are set correctly in the frontend
1185  * legacy tuning structures, for the advanced tuning API.
1186  */
1187 static int
1188 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1189                                 const struct dtv_frontend_properties *c,
1190                                 struct dvb_frontend_parameters *p)
1191 {
1192         p->frequency = c->frequency;
1193         p->inversion = c->inversion;
1194
1195         switch (dvbv3_type(c->delivery_system)) {
1196         case DVBV3_UNKNOWN:
1197                 dev_err(fe->dvb->device,
1198                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1199                                 __func__, c->delivery_system);
1200                 return -EINVAL;
1201         case DVBV3_QPSK:
1202                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1203                 p->u.qpsk.symbol_rate = c->symbol_rate;
1204                 p->u.qpsk.fec_inner = c->fec_inner;
1205                 break;
1206         case DVBV3_QAM:
1207                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1208                 p->u.qam.symbol_rate = c->symbol_rate;
1209                 p->u.qam.fec_inner = c->fec_inner;
1210                 p->u.qam.modulation = c->modulation;
1211                 break;
1212         case DVBV3_OFDM:
1213                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1214                 switch (c->bandwidth_hz) {
1215                 case 10000000:
1216                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1217                         break;
1218                 case 8000000:
1219                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1220                         break;
1221                 case 7000000:
1222                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1223                         break;
1224                 case 6000000:
1225                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1226                         break;
1227                 case 5000000:
1228                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1229                         break;
1230                 case 1712000:
1231                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1232                         break;
1233                 case 0:
1234                 default:
1235                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1236                 }
1237                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1238                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1239                 p->u.ofdm.constellation = c->modulation;
1240                 p->u.ofdm.transmission_mode = c->transmission_mode;
1241                 p->u.ofdm.guard_interval = c->guard_interval;
1242                 p->u.ofdm.hierarchy_information = c->hierarchy;
1243                 break;
1244         case DVBV3_ATSC:
1245                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1246                 p->u.vsb.modulation = c->modulation;
1247                 break;
1248         }
1249         return 0;
1250 }
1251
1252 /**
1253  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1254  * @fe:         struct dvb_frontend pointer
1255  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1256  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1257  *
1258  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1259  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1260  * If p_out is not null, it will update the DVBv3 params pointed by it.
1261  */
1262 static int dtv_get_frontend(struct dvb_frontend *fe,
1263                             struct dtv_frontend_properties *c,
1264                             struct dvb_frontend_parameters *p_out)
1265 {
1266         int r;
1267
1268         if (fe->ops.get_frontend) {
1269                 r = fe->ops.get_frontend(fe, c);
1270                 if (unlikely(r < 0))
1271                         return r;
1272                 if (p_out)
1273                         dtv_property_legacy_params_sync(fe, c, p_out);
1274                 return 0;
1275         }
1276
1277         /* As everything is in cache, get_frontend fops are always supported */
1278         return 0;
1279 }
1280
1281 static int dvb_frontend_ioctl_legacy(struct file *file,
1282                         unsigned int cmd, void *parg);
1283 static int dvb_frontend_ioctl_properties(struct file *file,
1284                         unsigned int cmd, void *parg);
1285
1286 static int dtv_property_process_get(struct dvb_frontend *fe,
1287                                     const struct dtv_frontend_properties *c,
1288                                     struct dtv_property *tvp,
1289                                     struct file *file)
1290 {
1291         int r, ncaps;
1292
1293         switch(tvp->cmd) {
1294         case DTV_ENUM_DELSYS:
1295                 ncaps = 0;
1296                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1297                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1298                         ncaps++;
1299                 }
1300                 tvp->u.buffer.len = ncaps;
1301                 break;
1302         case DTV_FREQUENCY:
1303                 tvp->u.data = c->frequency;
1304                 break;
1305         case DTV_MODULATION:
1306                 tvp->u.data = c->modulation;
1307                 break;
1308         case DTV_BANDWIDTH_HZ:
1309                 tvp->u.data = c->bandwidth_hz;
1310                 break;
1311         case DTV_INVERSION:
1312                 tvp->u.data = c->inversion;
1313                 break;
1314         case DTV_SYMBOL_RATE:
1315                 tvp->u.data = c->symbol_rate;
1316                 break;
1317         case DTV_INNER_FEC:
1318                 tvp->u.data = c->fec_inner;
1319                 break;
1320         case DTV_PILOT:
1321                 tvp->u.data = c->pilot;
1322                 break;
1323         case DTV_ROLLOFF:
1324                 tvp->u.data = c->rolloff;
1325                 break;
1326         case DTV_DELIVERY_SYSTEM:
1327                 tvp->u.data = c->delivery_system;
1328                 break;
1329         case DTV_VOLTAGE:
1330                 tvp->u.data = c->voltage;
1331                 break;
1332         case DTV_TONE:
1333                 tvp->u.data = c->sectone;
1334                 break;
1335         case DTV_API_VERSION:
1336                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1337                 break;
1338         case DTV_CODE_RATE_HP:
1339                 tvp->u.data = c->code_rate_HP;
1340                 break;
1341         case DTV_CODE_RATE_LP:
1342                 tvp->u.data = c->code_rate_LP;
1343                 break;
1344         case DTV_GUARD_INTERVAL:
1345                 tvp->u.data = c->guard_interval;
1346                 break;
1347         case DTV_TRANSMISSION_MODE:
1348                 tvp->u.data = c->transmission_mode;
1349                 break;
1350         case DTV_HIERARCHY:
1351                 tvp->u.data = c->hierarchy;
1352                 break;
1353         case DTV_INTERLEAVING:
1354                 tvp->u.data = c->interleaving;
1355                 break;
1356
1357         /* ISDB-T Support here */
1358         case DTV_ISDBT_PARTIAL_RECEPTION:
1359                 tvp->u.data = c->isdbt_partial_reception;
1360                 break;
1361         case DTV_ISDBT_SOUND_BROADCASTING:
1362                 tvp->u.data = c->isdbt_sb_mode;
1363                 break;
1364         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1365                 tvp->u.data = c->isdbt_sb_subchannel;
1366                 break;
1367         case DTV_ISDBT_SB_SEGMENT_IDX:
1368                 tvp->u.data = c->isdbt_sb_segment_idx;
1369                 break;
1370         case DTV_ISDBT_SB_SEGMENT_COUNT:
1371                 tvp->u.data = c->isdbt_sb_segment_count;
1372                 break;
1373         case DTV_ISDBT_LAYER_ENABLED:
1374                 tvp->u.data = c->isdbt_layer_enabled;
1375                 break;
1376         case DTV_ISDBT_LAYERA_FEC:
1377                 tvp->u.data = c->layer[0].fec;
1378                 break;
1379         case DTV_ISDBT_LAYERA_MODULATION:
1380                 tvp->u.data = c->layer[0].modulation;
1381                 break;
1382         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1383                 tvp->u.data = c->layer[0].segment_count;
1384                 break;
1385         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1386                 tvp->u.data = c->layer[0].interleaving;
1387                 break;
1388         case DTV_ISDBT_LAYERB_FEC:
1389                 tvp->u.data = c->layer[1].fec;
1390                 break;
1391         case DTV_ISDBT_LAYERB_MODULATION:
1392                 tvp->u.data = c->layer[1].modulation;
1393                 break;
1394         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1395                 tvp->u.data = c->layer[1].segment_count;
1396                 break;
1397         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1398                 tvp->u.data = c->layer[1].interleaving;
1399                 break;
1400         case DTV_ISDBT_LAYERC_FEC:
1401                 tvp->u.data = c->layer[2].fec;
1402                 break;
1403         case DTV_ISDBT_LAYERC_MODULATION:
1404                 tvp->u.data = c->layer[2].modulation;
1405                 break;
1406         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1407                 tvp->u.data = c->layer[2].segment_count;
1408                 break;
1409         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1410                 tvp->u.data = c->layer[2].interleaving;
1411                 break;
1412
1413         /* Multistream support */
1414         case DTV_STREAM_ID:
1415         case DTV_DVBT2_PLP_ID_LEGACY:
1416                 tvp->u.data = c->stream_id;
1417                 break;
1418
1419         /* ATSC-MH */
1420         case DTV_ATSCMH_FIC_VER:
1421                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1422                 break;
1423         case DTV_ATSCMH_PARADE_ID:
1424                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1425                 break;
1426         case DTV_ATSCMH_NOG:
1427                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1428                 break;
1429         case DTV_ATSCMH_TNOG:
1430                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1431                 break;
1432         case DTV_ATSCMH_SGN:
1433                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1434                 break;
1435         case DTV_ATSCMH_PRC:
1436                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1437                 break;
1438         case DTV_ATSCMH_RS_FRAME_MODE:
1439                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1440                 break;
1441         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1442                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1443                 break;
1444         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1445                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1446                 break;
1447         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1448                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1449                 break;
1450         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1451                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1452                 break;
1453         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1454                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1455                 break;
1456         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1457                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1458                 break;
1459         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1460                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1461                 break;
1462         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1463                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1464                 break;
1465
1466         case DTV_LNA:
1467                 tvp->u.data = c->lna;
1468                 break;
1469
1470         /* Fill quality measures */
1471         case DTV_STAT_SIGNAL_STRENGTH:
1472                 tvp->u.st = c->strength;
1473                 break;
1474         case DTV_STAT_CNR:
1475                 tvp->u.st = c->cnr;
1476                 break;
1477         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1478                 tvp->u.st = c->pre_bit_error;
1479                 break;
1480         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1481                 tvp->u.st = c->pre_bit_count;
1482                 break;
1483         case DTV_STAT_POST_ERROR_BIT_COUNT:
1484                 tvp->u.st = c->post_bit_error;
1485                 break;
1486         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1487                 tvp->u.st = c->post_bit_count;
1488                 break;
1489         case DTV_STAT_ERROR_BLOCK_COUNT:
1490                 tvp->u.st = c->block_error;
1491                 break;
1492         case DTV_STAT_TOTAL_BLOCK_COUNT:
1493                 tvp->u.st = c->block_count;
1494                 break;
1495         default:
1496                 dev_dbg(fe->dvb->device,
1497                         "%s: FE property %d doesn't exist\n",
1498                         __func__, tvp->cmd);
1499                 return -EINVAL;
1500         }
1501
1502         /* Allow the frontend to override outgoing properties */
1503         if (fe->ops.get_property) {
1504                 r = fe->ops.get_property(fe, tvp);
1505                 if (r < 0)
1506                         return r;
1507         }
1508
1509         dtv_property_dump(fe, false, tvp);
1510
1511         return 0;
1512 }
1513
1514 static int dtv_set_frontend(struct dvb_frontend *fe);
1515
1516 static bool is_dvbv3_delsys(u32 delsys)
1517 {
1518         bool status;
1519
1520         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1521                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1522
1523         return status;
1524 }
1525
1526 /**
1527  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1528  * @fe:                 struct frontend;
1529  * @delsys:                     DVBv5 type that will be used for emulation
1530  *
1531  * Provides emulation for delivery systems that are compatible with the old
1532  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1533  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1534  * parameters are compatible with DVB-S spec.
1535  */
1536 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1537 {
1538         int i;
1539         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1540
1541         c->delivery_system = delsys;
1542
1543         /*
1544          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1545          */
1546         if (c->delivery_system == SYS_ISDBT) {
1547                 dev_dbg(fe->dvb->device,
1548                         "%s: Using defaults for SYS_ISDBT\n",
1549                         __func__);
1550
1551                 if (!c->bandwidth_hz)
1552                         c->bandwidth_hz = 6000000;
1553
1554                 c->isdbt_partial_reception = 0;
1555                 c->isdbt_sb_mode = 0;
1556                 c->isdbt_sb_subchannel = 0;
1557                 c->isdbt_sb_segment_idx = 0;
1558                 c->isdbt_sb_segment_count = 0;
1559                 c->isdbt_layer_enabled = 7;
1560                 for (i = 0; i < 3; i++) {
1561                         c->layer[i].fec = FEC_AUTO;
1562                         c->layer[i].modulation = QAM_AUTO;
1563                         c->layer[i].interleaving = 0;
1564                         c->layer[i].segment_count = 0;
1565                 }
1566         }
1567         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1568                 __func__, c->delivery_system);
1569
1570         return 0;
1571 }
1572
1573 /**
1574  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1575  * @fe:                 frontend struct
1576  * @desired_system:     delivery system requested by the user
1577  *
1578  * A DVBv5 call know what's the desired system it wants. So, set it.
1579  *
1580  * There are, however, a few known issues with early DVBv5 applications that
1581  * are also handled by this logic:
1582  *
1583  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1584  *    This is an API violation, but, as we don't want to break userspace,
1585  *    convert it to the first supported delivery system.
1586  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1587  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1588  *    ISDB-T provided backward compat with DVB-T.
1589  */
1590 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1591                                      u32 desired_system)
1592 {
1593         int ncaps;
1594         u32 delsys = SYS_UNDEFINED;
1595         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1596         enum dvbv3_emulation_type type;
1597
1598         /*
1599          * It was reported that some old DVBv5 applications were
1600          * filling delivery_system with SYS_UNDEFINED. If this happens,
1601          * assume that the application wants to use the first supported
1602          * delivery system.
1603          */
1604         if (desired_system == SYS_UNDEFINED)
1605                 desired_system = fe->ops.delsys[0];
1606
1607         /*
1608          * This is a DVBv5 call. So, it likely knows the supported
1609          * delivery systems. So, check if the desired delivery system is
1610          * supported
1611          */
1612         ncaps = 0;
1613         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1614                 if (fe->ops.delsys[ncaps] == desired_system) {
1615                         c->delivery_system = desired_system;
1616                         dev_dbg(fe->dvb->device,
1617                                         "%s: Changing delivery system to %d\n",
1618                                         __func__, desired_system);
1619                         return 0;
1620                 }
1621                 ncaps++;
1622         }
1623
1624         /*
1625          * The requested delivery system isn't supported. Maybe userspace
1626          * is requesting a DVBv3 compatible delivery system.
1627          *
1628          * The emulation only works if the desired system is one of the
1629          * delivery systems supported by DVBv3 API
1630          */
1631         if (!is_dvbv3_delsys(desired_system)) {
1632                 dev_dbg(fe->dvb->device,
1633                         "%s: Delivery system %d not supported.\n",
1634                         __func__, desired_system);
1635                 return -EINVAL;
1636         }
1637
1638         type = dvbv3_type(desired_system);
1639
1640         /*
1641         * Get the last non-DVBv3 delivery system that has the same type
1642         * of the desired system
1643         */
1644         ncaps = 0;
1645         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1646                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1647                         delsys = fe->ops.delsys[ncaps];
1648                 ncaps++;
1649         }
1650
1651         /* There's nothing compatible with the desired delivery system */
1652         if (delsys == SYS_UNDEFINED) {
1653                 dev_dbg(fe->dvb->device,
1654                         "%s: Delivery system %d not supported on emulation mode.\n",
1655                         __func__, desired_system);
1656                 return -EINVAL;
1657         }
1658
1659         dev_dbg(fe->dvb->device,
1660                 "%s: Using delivery system %d emulated as if it were %d\n",
1661                 __func__, delsys, desired_system);
1662
1663         return emulate_delivery_system(fe, desired_system);
1664 }
1665
1666 /**
1667  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1668  * @fe: frontend struct
1669  *
1670  * A DVBv3 call doesn't know what's the desired system it wants. It also
1671  * doesn't allow to switch between different types. Due to that, userspace
1672  * should use DVBv5 instead.
1673  * However, in order to avoid breaking userspace API, limited backward
1674  * compatibility support is provided.
1675  *
1676  * There are some delivery systems that are incompatible with DVBv3 calls.
1677  *
1678  * This routine should work fine for frontends that support just one delivery
1679  * system.
1680  *
1681  * For frontends that support multiple frontends:
1682  * 1) It defaults to use the first supported delivery system. There's an
1683  *    userspace application that allows changing it at runtime;
1684  *
1685  * 2) If the current delivery system is not compatible with DVBv3, it gets
1686  *    the first one that it is compatible.
1687  *
1688  * NOTE: in order for this to work with applications like Kaffeine that
1689  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1690  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1691  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1692  *      to DVB-S.
1693  */
1694 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1695 {
1696         int ncaps;
1697         u32 delsys = SYS_UNDEFINED;
1698         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1699
1700         /* If not set yet, defaults to the first supported delivery system */
1701         if (c->delivery_system == SYS_UNDEFINED)
1702                 c->delivery_system = fe->ops.delsys[0];
1703
1704         /*
1705          * Trivial case: just use the current one, if it already a DVBv3
1706          * delivery system
1707          */
1708         if (is_dvbv3_delsys(c->delivery_system)) {
1709                 dev_dbg(fe->dvb->device,
1710                                 "%s: Using delivery system to %d\n",
1711                                 __func__, c->delivery_system);
1712                 return 0;
1713         }
1714
1715         /*
1716          * Seek for the first delivery system that it is compatible with a
1717          * DVBv3 standard
1718          */
1719         ncaps = 0;
1720         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1721                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1722                         delsys = fe->ops.delsys[ncaps];
1723                         break;
1724                 }
1725                 ncaps++;
1726         }
1727         if (delsys == SYS_UNDEFINED) {
1728                 dev_dbg(fe->dvb->device,
1729                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1730                         __func__);
1731                 return -EINVAL;
1732         }
1733         return emulate_delivery_system(fe, delsys);
1734 }
1735
1736 static int dtv_property_process_set(struct dvb_frontend *fe,
1737                                     struct dtv_property *tvp,
1738                                     struct file *file)
1739 {
1740         int r = 0;
1741         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1742
1743         /* Allow the frontend to validate incoming properties */
1744         if (fe->ops.set_property) {
1745                 r = fe->ops.set_property(fe, tvp);
1746                 if (r < 0)
1747                         return r;
1748         }
1749
1750         dtv_property_dump(fe, true, tvp);
1751
1752         switch(tvp->cmd) {
1753         case DTV_CLEAR:
1754                 /*
1755                  * Reset a cache of data specific to the frontend here. This does
1756                  * not effect hardware.
1757                  */
1758                 dvb_frontend_clear_cache(fe);
1759                 break;
1760         case DTV_TUNE:
1761                 /* interpret the cache of data, build either a traditional frontend
1762                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1763                  * ioctl.
1764                  */
1765                 c->state = tvp->cmd;
1766                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1767                                 __func__);
1768
1769                 r = dtv_set_frontend(fe);
1770                 break;
1771         case DTV_FREQUENCY:
1772                 c->frequency = tvp->u.data;
1773                 break;
1774         case DTV_MODULATION:
1775                 c->modulation = tvp->u.data;
1776                 break;
1777         case DTV_BANDWIDTH_HZ:
1778                 c->bandwidth_hz = tvp->u.data;
1779                 break;
1780         case DTV_INVERSION:
1781                 c->inversion = tvp->u.data;
1782                 break;
1783         case DTV_SYMBOL_RATE:
1784                 c->symbol_rate = tvp->u.data;
1785                 break;
1786         case DTV_INNER_FEC:
1787                 c->fec_inner = tvp->u.data;
1788                 break;
1789         case DTV_PILOT:
1790                 c->pilot = tvp->u.data;
1791                 break;
1792         case DTV_ROLLOFF:
1793                 c->rolloff = tvp->u.data;
1794                 break;
1795         case DTV_DELIVERY_SYSTEM:
1796                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1797                 break;
1798         case DTV_VOLTAGE:
1799                 c->voltage = tvp->u.data;
1800                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1801                         (void *)c->voltage);
1802                 break;
1803         case DTV_TONE:
1804                 c->sectone = tvp->u.data;
1805                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1806                         (void *)c->sectone);
1807                 break;
1808         case DTV_CODE_RATE_HP:
1809                 c->code_rate_HP = tvp->u.data;
1810                 break;
1811         case DTV_CODE_RATE_LP:
1812                 c->code_rate_LP = tvp->u.data;
1813                 break;
1814         case DTV_GUARD_INTERVAL:
1815                 c->guard_interval = tvp->u.data;
1816                 break;
1817         case DTV_TRANSMISSION_MODE:
1818                 c->transmission_mode = tvp->u.data;
1819                 break;
1820         case DTV_HIERARCHY:
1821                 c->hierarchy = tvp->u.data;
1822                 break;
1823         case DTV_INTERLEAVING:
1824                 c->interleaving = tvp->u.data;
1825                 break;
1826
1827         /* ISDB-T Support here */
1828         case DTV_ISDBT_PARTIAL_RECEPTION:
1829                 c->isdbt_partial_reception = tvp->u.data;
1830                 break;
1831         case DTV_ISDBT_SOUND_BROADCASTING:
1832                 c->isdbt_sb_mode = tvp->u.data;
1833                 break;
1834         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1835                 c->isdbt_sb_subchannel = tvp->u.data;
1836                 break;
1837         case DTV_ISDBT_SB_SEGMENT_IDX:
1838                 c->isdbt_sb_segment_idx = tvp->u.data;
1839                 break;
1840         case DTV_ISDBT_SB_SEGMENT_COUNT:
1841                 c->isdbt_sb_segment_count = tvp->u.data;
1842                 break;
1843         case DTV_ISDBT_LAYER_ENABLED:
1844                 c->isdbt_layer_enabled = tvp->u.data;
1845                 break;
1846         case DTV_ISDBT_LAYERA_FEC:
1847                 c->layer[0].fec = tvp->u.data;
1848                 break;
1849         case DTV_ISDBT_LAYERA_MODULATION:
1850                 c->layer[0].modulation = tvp->u.data;
1851                 break;
1852         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1853                 c->layer[0].segment_count = tvp->u.data;
1854                 break;
1855         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1856                 c->layer[0].interleaving = tvp->u.data;
1857                 break;
1858         case DTV_ISDBT_LAYERB_FEC:
1859                 c->layer[1].fec = tvp->u.data;
1860                 break;
1861         case DTV_ISDBT_LAYERB_MODULATION:
1862                 c->layer[1].modulation = tvp->u.data;
1863                 break;
1864         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1865                 c->layer[1].segment_count = tvp->u.data;
1866                 break;
1867         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1868                 c->layer[1].interleaving = tvp->u.data;
1869                 break;
1870         case DTV_ISDBT_LAYERC_FEC:
1871                 c->layer[2].fec = tvp->u.data;
1872                 break;
1873         case DTV_ISDBT_LAYERC_MODULATION:
1874                 c->layer[2].modulation = tvp->u.data;
1875                 break;
1876         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1877                 c->layer[2].segment_count = tvp->u.data;
1878                 break;
1879         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1880                 c->layer[2].interleaving = tvp->u.data;
1881                 break;
1882
1883         /* Multistream support */
1884         case DTV_STREAM_ID:
1885         case DTV_DVBT2_PLP_ID_LEGACY:
1886                 c->stream_id = tvp->u.data;
1887                 break;
1888
1889         /* ATSC-MH */
1890         case DTV_ATSCMH_PARADE_ID:
1891                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1892                 break;
1893         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1894                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1895                 break;
1896
1897         case DTV_LNA:
1898                 c->lna = tvp->u.data;
1899                 if (fe->ops.set_lna)
1900                         r = fe->ops.set_lna(fe);
1901                 if (r < 0)
1902                         c->lna = LNA_AUTO;
1903                 break;
1904
1905         default:
1906                 return -EINVAL;
1907         }
1908
1909         return r;
1910 }
1911
1912 static int dvb_frontend_ioctl(struct file *file,
1913                         unsigned int cmd, void *parg)
1914 {
1915         struct dvb_device *dvbdev = file->private_data;
1916         struct dvb_frontend *fe = dvbdev->priv;
1917         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1918         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1919         int err = -EOPNOTSUPP;
1920
1921         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1922         if (down_interruptible(&fepriv->sem))
1923                 return -ERESTARTSYS;
1924
1925         if (fe->exit != DVB_FE_NO_EXIT) {
1926                 up(&fepriv->sem);
1927                 return -ENODEV;
1928         }
1929
1930         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1931             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1932              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1933                 up(&fepriv->sem);
1934                 return -EPERM;
1935         }
1936
1937         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1938                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1939         else {
1940                 c->state = DTV_UNDEFINED;
1941                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1942         }
1943
1944         up(&fepriv->sem);
1945         return err;
1946 }
1947
1948 static int dvb_frontend_ioctl_properties(struct file *file,
1949                         unsigned int cmd, void *parg)
1950 {
1951         struct dvb_device *dvbdev = file->private_data;
1952         struct dvb_frontend *fe = dvbdev->priv;
1953         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1954         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1955         int err = 0;
1956
1957         struct dtv_properties *tvps = parg;
1958         struct dtv_property *tvp = NULL;
1959         int i;
1960
1961         dev_dbg(fe->dvb->device, "%s:\n", __func__);
1962
1963         if (cmd == FE_SET_PROPERTY) {
1964                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1965                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1966
1967                 /* Put an arbitrary limit on the number of messages that can
1968                  * be sent at once */
1969                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1970                         return -EINVAL;
1971
1972                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
1973                 if (IS_ERR(tvp))
1974                         return PTR_ERR(tvp);
1975
1976                 for (i = 0; i < tvps->num; i++) {
1977                         err = dtv_property_process_set(fe, tvp + i, file);
1978                         if (err < 0)
1979                                 goto out;
1980                         (tvp + i)->result = err;
1981                 }
1982
1983                 if (c->state == DTV_TUNE)
1984                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1985
1986         } else if (cmd == FE_GET_PROPERTY) {
1987                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
1988
1989                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1990                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1991
1992                 /* Put an arbitrary limit on the number of messages that can
1993                  * be sent at once */
1994                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1995                         return -EINVAL;
1996
1997                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
1998                 if (IS_ERR(tvp))
1999                         return PTR_ERR(tvp);
2000
2001                 /*
2002                  * Let's use our own copy of property cache, in order to
2003                  * avoid mangling with DTV zigzag logic, as drivers might
2004                  * return crap, if they don't check if the data is available
2005                  * before updating the properties cache.
2006                  */
2007                 if (fepriv->state != FESTATE_IDLE) {
2008                         err = dtv_get_frontend(fe, &getp, NULL);
2009                         if (err < 0)
2010                                 goto out;
2011                 }
2012                 for (i = 0; i < tvps->num; i++) {
2013                         err = dtv_property_process_get(fe, &getp, tvp + i, file);
2014                         if (err < 0)
2015                                 goto out;
2016                         (tvp + i)->result = err;
2017                 }
2018
2019                 if (copy_to_user((void __user *)tvps->props, tvp,
2020                                  tvps->num * sizeof(struct dtv_property))) {
2021                         err = -EFAULT;
2022                         goto out;
2023                 }
2024
2025         } else
2026                 err = -EOPNOTSUPP;
2027
2028 out:
2029         kfree(tvp);
2030         return err;
2031 }
2032
2033 static int dtv_set_frontend(struct dvb_frontend *fe)
2034 {
2035         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2036         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2037         struct dvb_frontend_tune_settings fetunesettings;
2038         u32 rolloff = 0;
2039
2040         if (dvb_frontend_check_parameters(fe) < 0)
2041                 return -EINVAL;
2042
2043         /*
2044          * Initialize output parameters to match the values given by
2045          * the user. FE_SET_FRONTEND triggers an initial frontend event
2046          * with status = 0, which copies output parameters to userspace.
2047          */
2048         dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2049
2050         /*
2051          * Be sure that the bandwidth will be filled for all
2052          * non-satellite systems, as tuners need to know what
2053          * low pass/Nyquist half filter should be applied, in
2054          * order to avoid inter-channel noise.
2055          *
2056          * ISDB-T and DVB-T/T2 already sets bandwidth.
2057          * ATSC and DVB-C don't set, so, the core should fill it.
2058          *
2059          * On DVB-C Annex A and C, the bandwidth is a function of
2060          * the roll-off and symbol rate. Annex B defines different
2061          * roll-off factors depending on the modulation. Fortunately,
2062          * Annex B is only used with 6MHz, so there's no need to
2063          * calculate it.
2064          *
2065          * While not officially supported, a side effect of handling it at
2066          * the cache level is that a program could retrieve the bandwidth
2067          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2068          */
2069         switch (c->delivery_system) {
2070         case SYS_ATSC:
2071         case SYS_DVBC_ANNEX_B:
2072                 c->bandwidth_hz = 6000000;
2073                 break;
2074         case SYS_DVBC_ANNEX_A:
2075                 rolloff = 115;
2076                 break;
2077         case SYS_DVBC_ANNEX_C:
2078                 rolloff = 113;
2079                 break;
2080         case SYS_DVBS:
2081         case SYS_TURBO:
2082         case SYS_ISDBS:
2083                 rolloff = 135;
2084                 break;
2085         case SYS_DVBS2:
2086                 switch (c->rolloff) {
2087                 case ROLLOFF_20:
2088                         rolloff = 120;
2089                         break;
2090                 case ROLLOFF_25:
2091                         rolloff = 125;
2092                         break;
2093                 default:
2094                 case ROLLOFF_35:
2095                         rolloff = 135;
2096                 }
2097                 break;
2098         default:
2099                 break;
2100         }
2101         if (rolloff)
2102                 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2103
2104         /* force auto frequency inversion if requested */
2105         if (dvb_force_auto_inversion)
2106                 c->inversion = INVERSION_AUTO;
2107
2108         /*
2109          * without hierarchical coding code_rate_LP is irrelevant,
2110          * so we tolerate the otherwise invalid FEC_NONE setting
2111          */
2112         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2113                 c->code_rate_LP = FEC_AUTO;
2114
2115         /* get frontend-specific tuning settings */
2116         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2117         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2118                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2119                 fepriv->max_drift = fetunesettings.max_drift;
2120                 fepriv->step_size = fetunesettings.step_size;
2121         } else {
2122                 /* default values */
2123                 switch (c->delivery_system) {
2124                 case SYS_DVBS:
2125                 case SYS_DVBS2:
2126                 case SYS_ISDBS:
2127                 case SYS_TURBO:
2128                 case SYS_DVBC_ANNEX_A:
2129                 case SYS_DVBC_ANNEX_C:
2130                         fepriv->min_delay = HZ / 20;
2131                         fepriv->step_size = c->symbol_rate / 16000;
2132                         fepriv->max_drift = c->symbol_rate / 2000;
2133                         break;
2134                 case SYS_DVBT:
2135                 case SYS_DVBT2:
2136                 case SYS_ISDBT:
2137                 case SYS_DTMB:
2138                         fepriv->min_delay = HZ / 20;
2139                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2140                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2141                         break;
2142                 default:
2143                         /*
2144                          * FIXME: This sounds wrong! if freqency_stepsize is
2145                          * defined by the frontend, why not use it???
2146                          */
2147                         fepriv->min_delay = HZ / 20;
2148                         fepriv->step_size = 0; /* no zigzag */
2149                         fepriv->max_drift = 0;
2150                         break;
2151                 }
2152         }
2153         if (dvb_override_tune_delay > 0)
2154                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2155
2156         fepriv->state = FESTATE_RETUNE;
2157
2158         /* Request the search algorithm to search */
2159         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2160
2161         dvb_frontend_clear_events(fe);
2162         dvb_frontend_add_event(fe, 0);
2163         dvb_frontend_wakeup(fe);
2164         fepriv->status = 0;
2165
2166         return 0;
2167 }
2168
2169
2170 static int dvb_frontend_ioctl_legacy(struct file *file,
2171                         unsigned int cmd, void *parg)
2172 {
2173         struct dvb_device *dvbdev = file->private_data;
2174         struct dvb_frontend *fe = dvbdev->priv;
2175         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2176         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2177         int err = -EOPNOTSUPP;
2178
2179         switch (cmd) {
2180         case FE_GET_INFO: {
2181                 struct dvb_frontend_info* info = parg;
2182
2183                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2184                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2185
2186                 /*
2187                  * Associate the 4 delivery systems supported by DVBv3
2188                  * API with their DVBv5 counterpart. For the other standards,
2189                  * use the closest type, assuming that it would hopefully
2190                  * work with a DVBv3 application.
2191                  * It should be noticed that, on multi-frontend devices with
2192                  * different types (terrestrial and cable, for example),
2193                  * a pure DVBv3 application won't be able to use all delivery
2194                  * systems. Yet, changing the DVBv5 cache to the other delivery
2195                  * system should be enough for making it work.
2196                  */
2197                 switch (dvbv3_type(c->delivery_system)) {
2198                 case DVBV3_QPSK:
2199                         info->type = FE_QPSK;
2200                         break;
2201                 case DVBV3_ATSC:
2202                         info->type = FE_ATSC;
2203                         break;
2204                 case DVBV3_QAM:
2205                         info->type = FE_QAM;
2206                         break;
2207                 case DVBV3_OFDM:
2208                         info->type = FE_OFDM;
2209                         break;
2210                 default:
2211                         dev_err(fe->dvb->device,
2212                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2213                                         __func__, c->delivery_system);
2214                         fe->ops.info.type = FE_OFDM;
2215                 }
2216                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2217                                  __func__, c->delivery_system, fe->ops.info.type);
2218
2219                 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2220                 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2221                         info->caps |= FE_CAN_INVERSION_AUTO;
2222                 err = 0;
2223                 break;
2224         }
2225
2226         case FE_READ_STATUS: {
2227                 enum fe_status *status = parg;
2228
2229                 /* if retune was requested but hasn't occurred yet, prevent
2230                  * that user get signal state from previous tuning */
2231                 if (fepriv->state == FESTATE_RETUNE ||
2232                     fepriv->state == FESTATE_ERROR) {
2233                         err=0;
2234                         *status = 0;
2235                         break;
2236                 }
2237
2238                 if (fe->ops.read_status)
2239                         err = fe->ops.read_status(fe, status);
2240                 break;
2241         }
2242
2243         case FE_READ_BER:
2244                 if (fe->ops.read_ber) {
2245                         if (fepriv->thread)
2246                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2247                         else
2248                                 err = -EAGAIN;
2249                 }
2250                 break;
2251
2252         case FE_READ_SIGNAL_STRENGTH:
2253                 if (fe->ops.read_signal_strength) {
2254                         if (fepriv->thread)
2255                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2256                         else
2257                                 err = -EAGAIN;
2258                 }
2259                 break;
2260
2261         case FE_READ_SNR:
2262                 if (fe->ops.read_snr) {
2263                         if (fepriv->thread)
2264                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2265                         else
2266                                 err = -EAGAIN;
2267                 }
2268                 break;
2269
2270         case FE_READ_UNCORRECTED_BLOCKS:
2271                 if (fe->ops.read_ucblocks) {
2272                         if (fepriv->thread)
2273                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2274                         else
2275                                 err = -EAGAIN;
2276                 }
2277                 break;
2278
2279         case FE_DISEQC_RESET_OVERLOAD:
2280                 if (fe->ops.diseqc_reset_overload) {
2281                         err = fe->ops.diseqc_reset_overload(fe);
2282                         fepriv->state = FESTATE_DISEQC;
2283                         fepriv->status = 0;
2284                 }
2285                 break;
2286
2287         case FE_DISEQC_SEND_MASTER_CMD:
2288                 if (fe->ops.diseqc_send_master_cmd) {
2289                         struct dvb_diseqc_master_cmd *cmd = parg;
2290
2291                         if (cmd->msg_len > sizeof(cmd->msg)) {
2292                                 err = -EINVAL;
2293                                 break;
2294                         }
2295                         err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2296                         fepriv->state = FESTATE_DISEQC;
2297                         fepriv->status = 0;
2298                 }
2299                 break;
2300
2301         case FE_DISEQC_SEND_BURST:
2302                 if (fe->ops.diseqc_send_burst) {
2303                         err = fe->ops.diseqc_send_burst(fe,
2304                                                 (enum fe_sec_mini_cmd)parg);
2305                         fepriv->state = FESTATE_DISEQC;
2306                         fepriv->status = 0;
2307                 }
2308                 break;
2309
2310         case FE_SET_TONE:
2311                 if (fe->ops.set_tone) {
2312                         err = fe->ops.set_tone(fe,
2313                                                (enum fe_sec_tone_mode)parg);
2314                         fepriv->tone = (enum fe_sec_tone_mode)parg;
2315                         fepriv->state = FESTATE_DISEQC;
2316                         fepriv->status = 0;
2317                 }
2318                 break;
2319
2320         case FE_SET_VOLTAGE:
2321                 if (fe->ops.set_voltage) {
2322                         err = fe->ops.set_voltage(fe,
2323                                                   (enum fe_sec_voltage)parg);
2324                         fepriv->voltage = (enum fe_sec_voltage)parg;
2325                         fepriv->state = FESTATE_DISEQC;
2326                         fepriv->status = 0;
2327                 }
2328                 break;
2329
2330         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2331                 if (fe->ops.dishnetwork_send_legacy_command) {
2332                         err = fe->ops.dishnetwork_send_legacy_command(fe,
2333                                                          (unsigned long)parg);
2334                         fepriv->state = FESTATE_DISEQC;
2335                         fepriv->status = 0;
2336                 } else if (fe->ops.set_voltage) {
2337                         /*
2338                          * NOTE: This is a fallback condition.  Some frontends
2339                          * (stv0299 for instance) take longer than 8msec to
2340                          * respond to a set_voltage command.  Those switches
2341                          * need custom routines to switch properly.  For all
2342                          * other frontends, the following should work ok.
2343                          * Dish network legacy switches (as used by Dish500)
2344                          * are controlled by sending 9-bit command words
2345                          * spaced 8msec apart.
2346                          * the actual command word is switch/port dependent
2347                          * so it is up to the userspace application to send
2348                          * the right command.
2349                          * The command must always start with a '0' after
2350                          * initialization, so parg is 8 bits and does not
2351                          * include the initialization or start bit
2352                          */
2353                         unsigned long swcmd = ((unsigned long) parg) << 1;
2354                         ktime_t nexttime;
2355                         ktime_t tv[10];
2356                         int i;
2357                         u8 last = 1;
2358                         if (dvb_frontend_debug)
2359                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2360                         nexttime = ktime_get_boottime();
2361                         if (dvb_frontend_debug)
2362                                 tv[0] = nexttime;
2363                         /* before sending a command, initialize by sending
2364                          * a 32ms 18V to the switch
2365                          */
2366                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2367                         dvb_frontend_sleep_until(&nexttime, 32000);
2368
2369                         for (i = 0; i < 9; i++) {
2370                                 if (dvb_frontend_debug)
2371                                         tv[i+1] = ktime_get_boottime();
2372                                 if ((swcmd & 0x01) != last) {
2373                                         /* set voltage to (last ? 13V : 18V) */
2374                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2375                                         last = (last) ? 0 : 1;
2376                                 }
2377                                 swcmd = swcmd >> 1;
2378                                 if (i != 8)
2379                                         dvb_frontend_sleep_until(&nexttime, 8000);
2380                         }
2381                         if (dvb_frontend_debug) {
2382                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2383                                         __func__, fe->dvb->num);
2384                                 for (i = 1; i < 10; i++)
2385                                         printk("%d: %d\n", i,
2386                                         (int) ktime_us_delta(tv[i], tv[i-1]));
2387                         }
2388                         err = 0;
2389                         fepriv->state = FESTATE_DISEQC;
2390                         fepriv->status = 0;
2391                 }
2392                 break;
2393
2394         case FE_DISEQC_RECV_SLAVE_REPLY:
2395                 if (fe->ops.diseqc_recv_slave_reply)
2396                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2397                 break;
2398
2399         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2400                 if (fe->ops.enable_high_lnb_voltage)
2401                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2402                 break;
2403
2404         case FE_SET_FRONTEND:
2405                 err = dvbv3_set_delivery_system(fe);
2406                 if (err)
2407                         break;
2408
2409                 err = dtv_property_cache_sync(fe, c, parg);
2410                 if (err)
2411                         break;
2412                 err = dtv_set_frontend(fe);
2413                 break;
2414         case FE_GET_EVENT:
2415                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2416                 break;
2417
2418         case FE_GET_FRONTEND: {
2419                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2420
2421                 /*
2422                  * Let's use our own copy of property cache, in order to
2423                  * avoid mangling with DTV zigzag logic, as drivers might
2424                  * return crap, if they don't check if the data is available
2425                  * before updating the properties cache.
2426                  */
2427                 err = dtv_get_frontend(fe, &getp, parg);
2428                 break;
2429         }
2430         case FE_SET_FRONTEND_TUNE_MODE:
2431                 fepriv->tune_mode_flags = (unsigned long) parg;
2432                 err = 0;
2433                 break;
2434         }
2435
2436         return err;
2437 }
2438
2439
2440 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2441 {
2442         struct dvb_device *dvbdev = file->private_data;
2443         struct dvb_frontend *fe = dvbdev->priv;
2444         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2445
2446         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2447
2448         poll_wait (file, &fepriv->events.wait_queue, wait);
2449
2450         if (fepriv->events.eventw != fepriv->events.eventr)
2451                 return (POLLIN | POLLRDNORM | POLLPRI);
2452
2453         return 0;
2454 }
2455
2456 static int dvb_frontend_open(struct inode *inode, struct file *file)
2457 {
2458         struct dvb_device *dvbdev = file->private_data;
2459         struct dvb_frontend *fe = dvbdev->priv;
2460         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2461         struct dvb_adapter *adapter = fe->dvb;
2462         int ret;
2463
2464         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2465         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2466                 return -ENODEV;
2467
2468         if (adapter->mfe_shared) {
2469                 mutex_lock (&adapter->mfe_lock);
2470
2471                 if (adapter->mfe_dvbdev == NULL)
2472                         adapter->mfe_dvbdev = dvbdev;
2473
2474                 else if (adapter->mfe_dvbdev != dvbdev) {
2475                         struct dvb_device
2476                                 *mfedev = adapter->mfe_dvbdev;
2477                         struct dvb_frontend
2478                                 *mfe = mfedev->priv;
2479                         struct dvb_frontend_private
2480                                 *mfepriv = mfe->frontend_priv;
2481                         int mferetry = (dvb_mfe_wait_time << 1);
2482
2483                         mutex_unlock (&adapter->mfe_lock);
2484                         while (mferetry-- && (mfedev->users != -1 ||
2485                                         mfepriv->thread != NULL)) {
2486                                 if(msleep_interruptible(500)) {
2487                                         if(signal_pending(current))
2488                                                 return -EINTR;
2489                                 }
2490                         }
2491
2492                         mutex_lock (&adapter->mfe_lock);
2493                         if(adapter->mfe_dvbdev != dvbdev) {
2494                                 mfedev = adapter->mfe_dvbdev;
2495                                 mfe = mfedev->priv;
2496                                 mfepriv = mfe->frontend_priv;
2497                                 if (mfedev->users != -1 ||
2498                                                 mfepriv->thread != NULL) {
2499                                         mutex_unlock (&adapter->mfe_lock);
2500                                         return -EBUSY;
2501                                 }
2502                                 adapter->mfe_dvbdev = dvbdev;
2503                         }
2504                 }
2505         }
2506
2507         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2508                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2509                         goto err0;
2510
2511                 /* If we took control of the bus, we need to force
2512                    reinitialization.  This is because many ts_bus_ctrl()
2513                    functions strobe the RESET pin on the demod, and if the
2514                    frontend thread already exists then the dvb_init() routine
2515                    won't get called (which is what usually does initial
2516                    register configuration). */
2517                 fepriv->reinitialise = 1;
2518         }
2519
2520         if ((ret = dvb_generic_open (inode, file)) < 0)
2521                 goto err1;
2522
2523         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2524                 /* normal tune mode when opened R/W */
2525                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2526                 fepriv->tone = -1;
2527                 fepriv->voltage = -1;
2528
2529 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2530                 if (fe->dvb->mdev && fe->dvb->mdev->enable_source) {
2531                         ret = fe->dvb->mdev->enable_source(dvbdev->entity,
2532                                                            &fepriv->pipe);
2533                         if (ret) {
2534                                 dev_err(fe->dvb->device,
2535                                         "Tuner is busy. Error %d\n", ret);
2536                                 goto err2;
2537                         }
2538                 }
2539 #endif
2540                 ret = dvb_frontend_start (fe);
2541                 if (ret)
2542                         goto err3;
2543
2544                 /*  empty event queue */
2545                 fepriv->events.eventr = fepriv->events.eventw = 0;
2546         }
2547
2548         dvb_frontend_private_get(fepriv);
2549
2550         if (adapter->mfe_shared)
2551                 mutex_unlock (&adapter->mfe_lock);
2552         return ret;
2553
2554 err3:
2555 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2556         if (fe->dvb->mdev && fe->dvb->mdev->disable_source)
2557                 fe->dvb->mdev->disable_source(dvbdev->entity);
2558 err2:
2559 #endif
2560         dvb_generic_release(inode, file);
2561 err1:
2562         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2563                 fe->ops.ts_bus_ctrl(fe, 0);
2564 err0:
2565         if (adapter->mfe_shared)
2566                 mutex_unlock (&adapter->mfe_lock);
2567         return ret;
2568 }
2569
2570 static int dvb_frontend_release(struct inode *inode, struct file *file)
2571 {
2572         struct dvb_device *dvbdev = file->private_data;
2573         struct dvb_frontend *fe = dvbdev->priv;
2574         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2575         int ret;
2576
2577         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2578
2579         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2580                 fepriv->release_jiffies = jiffies;
2581                 mb();
2582         }
2583
2584         ret = dvb_generic_release (inode, file);
2585
2586         if (dvbdev->users == -1) {
2587                 wake_up(&fepriv->wait_queue);
2588 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2589                 if (fe->dvb->mdev && fe->dvb->mdev->disable_source)
2590                         fe->dvb->mdev->disable_source(dvbdev->entity);
2591 #endif
2592                 if (fe->exit != DVB_FE_NO_EXIT)
2593                         wake_up(&dvbdev->wait_queue);
2594                 if (fe->ops.ts_bus_ctrl)
2595                         fe->ops.ts_bus_ctrl(fe, 0);
2596         }
2597
2598         dvb_frontend_private_put(fepriv);
2599
2600         return ret;
2601 }
2602
2603 static const struct file_operations dvb_frontend_fops = {
2604         .owner          = THIS_MODULE,
2605         .unlocked_ioctl = dvb_generic_ioctl,
2606         .poll           = dvb_frontend_poll,
2607         .open           = dvb_frontend_open,
2608         .release        = dvb_frontend_release,
2609         .llseek         = noop_llseek,
2610 };
2611
2612 int dvb_frontend_suspend(struct dvb_frontend *fe)
2613 {
2614         int ret = 0;
2615
2616         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2617                         fe->id);
2618
2619         if (fe->ops.tuner_ops.suspend)
2620                 ret = fe->ops.tuner_ops.suspend(fe);
2621         else if (fe->ops.tuner_ops.sleep)
2622                 ret = fe->ops.tuner_ops.sleep(fe);
2623
2624         if (fe->ops.sleep)
2625                 ret = fe->ops.sleep(fe);
2626
2627         return ret;
2628 }
2629 EXPORT_SYMBOL(dvb_frontend_suspend);
2630
2631 int dvb_frontend_resume(struct dvb_frontend *fe)
2632 {
2633         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2634         int ret = 0;
2635
2636         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2637                         fe->id);
2638
2639         fe->exit = DVB_FE_DEVICE_RESUME;
2640         if (fe->ops.init)
2641                 ret = fe->ops.init(fe);
2642
2643         if (fe->ops.tuner_ops.resume)
2644                 ret = fe->ops.tuner_ops.resume(fe);
2645         else if (fe->ops.tuner_ops.init)
2646                 ret = fe->ops.tuner_ops.init(fe);
2647
2648         if (fe->ops.set_tone && fepriv->tone != -1)
2649                 fe->ops.set_tone(fe, fepriv->tone);
2650         if (fe->ops.set_voltage && fepriv->voltage != -1)
2651                 fe->ops.set_voltage(fe, fepriv->voltage);
2652
2653         fe->exit = DVB_FE_NO_EXIT;
2654         fepriv->state = FESTATE_RETUNE;
2655         dvb_frontend_wakeup(fe);
2656
2657         return ret;
2658 }
2659 EXPORT_SYMBOL(dvb_frontend_resume);
2660
2661 int dvb_register_frontend(struct dvb_adapter* dvb,
2662                           struct dvb_frontend* fe)
2663 {
2664         struct dvb_frontend_private *fepriv;
2665         const struct dvb_device dvbdev_template = {
2666                 .users = ~0,
2667                 .writers = 1,
2668                 .readers = (~0)-1,
2669                 .fops = &dvb_frontend_fops,
2670 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2671                 .name = fe->ops.info.name,
2672 #endif
2673                 .kernel_ioctl = dvb_frontend_ioctl
2674         };
2675
2676         dev_dbg(dvb->device, "%s:\n", __func__);
2677
2678         if (mutex_lock_interruptible(&frontend_mutex))
2679                 return -ERESTARTSYS;
2680
2681         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2682         if (fe->frontend_priv == NULL) {
2683                 mutex_unlock(&frontend_mutex);
2684                 return -ENOMEM;
2685         }
2686         fepriv = fe->frontend_priv;
2687
2688         kref_init(&fepriv->refcount);
2689
2690         sema_init(&fepriv->sem, 1);
2691         init_waitqueue_head (&fepriv->wait_queue);
2692         init_waitqueue_head (&fepriv->events.wait_queue);
2693         mutex_init(&fepriv->events.mtx);
2694         fe->dvb = dvb;
2695         fepriv->inversion = INVERSION_OFF;
2696
2697         dev_info(fe->dvb->device,
2698                         "DVB: registering adapter %i frontend %i (%s)...\n",
2699                         fe->dvb->num, fe->id, fe->ops.info.name);
2700
2701         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2702                              fe, DVB_DEVICE_FRONTEND, 0);
2703
2704         /*
2705          * Initialize the cache to the proper values according with the
2706          * first supported delivery system (ops->delsys[0])
2707          */
2708
2709         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2710         dvb_frontend_clear_cache(fe);
2711
2712         mutex_unlock(&frontend_mutex);
2713         return 0;
2714 }
2715 EXPORT_SYMBOL(dvb_register_frontend);
2716
2717 int dvb_unregister_frontend(struct dvb_frontend* fe)
2718 {
2719         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2720         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2721
2722         mutex_lock(&frontend_mutex);
2723         dvb_frontend_stop (fe);
2724         dvb_unregister_device (fepriv->dvbdev);
2725
2726         /* fe is invalid now */
2727         mutex_unlock(&frontend_mutex);
2728         dvb_frontend_private_put(fepriv);
2729         return 0;
2730 }
2731 EXPORT_SYMBOL(dvb_unregister_frontend);
2732
2733 #ifdef CONFIG_MEDIA_ATTACH
2734 void dvb_frontend_detach(struct dvb_frontend* fe)
2735 {
2736         void *ptr;
2737
2738         if (fe->ops.release_sec) {
2739                 fe->ops.release_sec(fe);
2740                 dvb_detach(fe->ops.release_sec);
2741         }
2742         if (fe->ops.tuner_ops.release) {
2743                 fe->ops.tuner_ops.release(fe);
2744                 dvb_detach(fe->ops.tuner_ops.release);
2745         }
2746         if (fe->ops.analog_ops.release) {
2747                 fe->ops.analog_ops.release(fe);
2748                 dvb_detach(fe->ops.analog_ops.release);
2749         }
2750         ptr = (void*)fe->ops.release;
2751         if (ptr) {
2752                 fe->ops.release(fe);
2753                 dvb_detach(ptr);
2754         }
2755 }
2756 #else
2757 void dvb_frontend_detach(struct dvb_frontend* fe)
2758 {
2759         if (fe->ops.release_sec)
2760                 fe->ops.release_sec(fe);
2761         if (fe->ops.tuner_ops.release)
2762                 fe->ops.tuner_ops.release(fe);
2763         if (fe->ops.analog_ops.release)
2764                 fe->ops.analog_ops.release(fe);
2765         if (fe->ops.release)
2766                 fe->ops.release(fe);
2767 }
2768 #endif
2769 EXPORT_SYMBOL(dvb_frontend_detach);