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  * To obtain the license, point your browser to
  22  * http://www.gnu.org/copyleft/gpl.html
  23  */
  24
  25 /* Enables DVBv3 compatibility bits at the headers */
  26 #define __DVB_CORE__
  27
  28 #define pr_fmt(fmt) "dvb_frontend: " fmt
  29
  30 #include <linux/string.h>
  31 #include <linux/kernel.h>
  32 #include <linux/sched/signal.h>
  33 #include <linux/wait.h>
  34 #include <linux/slab.h>
  35 #include <linux/poll.h>
  36 #include <linux/semaphore.h>
  37 #include <linux/module.h>
  38 #include <linux/list.h>
  39 #include <linux/freezer.h>
  40 #include <linux/jiffies.h>
  41 #include <linux/kthread.h>
  42 #include <linux/ktime.h>
  43 #include <asm/processor.h>
  44
  45 #include "dvb_frontend.h"
  46 #include "dvbdev.h"
  47 #include <linux/dvb/version.h>
  48
  49 static int dvb_frontend_debug;
  50 static int dvb_shutdown_timeout;
  51 static int dvb_force_auto_inversion;
  52 static int dvb_override_tune_delay;
  53 static int dvb_powerdown_on_sleep = 1;
  54 static int dvb_mfe_wait_time = 5;
  55
  56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  58 module_param(dvb_shutdown_timeout, int, 0644);
  59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  60 module_param(dvb_force_auto_inversion, int, 0644);
  61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  62 module_param(dvb_override_tune_delay, int, 0644);
  63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  64 module_param(dvb_powerdown_on_sleep, int, 0644);
  65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  66 module_param(dvb_mfe_wait_time, int, 0644);
  67 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
  68
  69 #define dprintk(fmt, arg...) \
  70         printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
  71
  72 #define FESTATE_IDLE 1
  73 #define FESTATE_RETUNE 2
  74 #define FESTATE_TUNING_FAST 4
  75 #define FESTATE_TUNING_SLOW 8
  76 #define FESTATE_TUNED 16
  77 #define FESTATE_ZIGZAG_FAST 32
  78 #define FESTATE_ZIGZAG_SLOW 64
  79 #define FESTATE_DISEQC 128
  80 #define FESTATE_ERROR 256
  81 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  82 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  83 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  84 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  85
  86 /*
  87  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  88  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  89  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  90  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  91  * FESTATE_TUNED. The frontend has successfully locked on.
  92  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  93  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  94  * FESTATE_DISEQC. A DISEQC command has just been issued.
  95  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  96  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  97  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  98  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  99  */
 100
 101 static DEFINE_MUTEX(frontend_mutex);
 102
 103 struct dvb_frontend_private {
 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_invoke_release(struct dvb_frontend *fe,
 142                                         void (*release)(struct dvb_frontend *fe));
 143
 144 static void dvb_frontend_free(struct kref *ref)
 145 {
 146         struct dvb_frontend *fe =
 147                 container_of(ref, struct dvb_frontend, refcount);
 148         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 149
 150         dvb_free_device(fepriv->dvbdev);
 151
 152         dvb_frontend_invoke_release(fe, fe->ops.release);
 153
 154         kfree(fepriv);
 155 }
 156
 157 static void dvb_frontend_put(struct dvb_frontend *fe)
 158 {
 159         kref_put(&fe->refcount, dvb_frontend_free);
 160 }
 161
 162 static void dvb_frontend_get(struct dvb_frontend *fe)
 163 {
 164         kref_get(&fe->refcount);
 165 }
 166
 167 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 168 static int dtv_get_frontend(struct dvb_frontend *fe,
 169                             struct dtv_frontend_properties *c,
 170                             struct dvb_frontend_parameters *p_out);
 171 static int
 172 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 173                                 const struct dtv_frontend_properties *c,
 174                                 struct dvb_frontend_parameters *p);
 175
 176 static bool has_get_frontend(struct dvb_frontend *fe)
 177 {
 178         return fe->ops.get_frontend != NULL;
 179 }
 180
 181 /*
 182  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 183  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 184  * otherwise, a DVBv3 call will fail.
 185  */
 186 enum dvbv3_emulation_type {
 187         DVBV3_UNKNOWN,
 188         DVBV3_QPSK,
 189         DVBV3_QAM,
 190         DVBV3_OFDM,
 191         DVBV3_ATSC,
 192 };
 193
 194 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 195 {
 196         switch (delivery_system) {
 197         case SYS_DVBC_ANNEX_A:
 198         case SYS_DVBC_ANNEX_C:
 199                 return DVBV3_QAM;
 200         case SYS_DVBS:
 201         case SYS_DVBS2:
 202         case SYS_TURBO:
 203         case SYS_ISDBS:
 204         case SYS_DSS:
 205                 return DVBV3_QPSK;
 206         case SYS_DVBT:
 207         case SYS_DVBT2:
 208         case SYS_ISDBT:
 209         case SYS_DTMB:
 210                 return DVBV3_OFDM;
 211         case SYS_ATSC:
 212         case SYS_ATSCMH:
 213         case SYS_DVBC_ANNEX_B:
 214                 return DVBV3_ATSC;
 215         case SYS_UNDEFINED:
 216         case SYS_ISDBC:
 217         case SYS_DVBH:
 218         case SYS_DAB:
 219         default:
 220                 /*
 221                  * Doesn't know how to emulate those types and/or
 222                  * there's no frontend driver from this type yet
 223                  * with some emulation code, so, we're not sure yet how
 224                  * to handle them, or they're not compatible with a DVBv3 call.
 225                  */
 226                 return DVBV3_UNKNOWN;
 227         }
 228 }
 229
 230 static void dvb_frontend_add_event(struct dvb_frontend *fe,
 231                                    enum fe_status status)
 232 {
 233         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 234         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 235         struct dvb_fe_events *events = &fepriv->events;
 236         struct dvb_frontend_event *e;
 237         int wp;
 238
 239         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 240
 241         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 242                 dtv_get_frontend(fe, c, &fepriv->parameters_out);
 243
 244         mutex_lock(&events->mtx);
 245
 246         wp = (events->eventw + 1) % MAX_EVENT;
 247         if (wp == events->eventr) {
 248                 events->overflow = 1;
 249                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 250         }
 251
 252         e = &events->events[events->eventw];
 253         e->status = status;
 254         e->parameters = fepriv->parameters_out;
 255
 256         events->eventw = wp;
 257
 258         mutex_unlock(&events->mtx);
 259
 260         wake_up_interruptible (&events->wait_queue);
 261 }
 262
 263 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 264                             struct dvb_frontend_event *event, int flags)
 265 {
 266         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 267         struct dvb_fe_events *events = &fepriv->events;
 268
 269         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 270
 271         if (events->overflow) {
 272                 events->overflow = 0;
 273                 return -EOVERFLOW;
 274         }
 275
 276         if (events->eventw == events->eventr) {
 277                 int ret;
 278
 279                 if (flags & O_NONBLOCK)
 280                         return -EWOULDBLOCK;
 281
 282                 up(&fepriv->sem);
 283
 284                 ret = wait_event_interruptible (events->wait_queue,
 285                                                 events->eventw != events->eventr);
 286
 287                 if (down_interruptible (&fepriv->sem))
 288                         return -ERESTARTSYS;
 289
 290                 if (ret < 0)
 291                         return ret;
 292         }
 293
 294         mutex_lock(&events->mtx);
 295         *event = events->events[events->eventr];
 296         events->eventr = (events->eventr + 1) % MAX_EVENT;
 297         mutex_unlock(&events->mtx);
 298
 299         return 0;
 300 }
 301
 302 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 303 {
 304         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 305         struct dvb_fe_events *events = &fepriv->events;
 306
 307         mutex_lock(&events->mtx);
 308         events->eventr = events->eventw;
 309         mutex_unlock(&events->mtx);
 310 }
 311
 312 static void dvb_frontend_init(struct dvb_frontend *fe)
 313 {
 314         dev_dbg(fe->dvb->device,
 315                         "%s: initialising adapter %i frontend %i (%s)...\n",
 316                         __func__, fe->dvb->num, fe->id, fe->ops.info.name);
 317
 318         if (fe->ops.init)
 319                 fe->ops.init(fe);
 320         if (fe->ops.tuner_ops.init) {
 321                 if (fe->ops.i2c_gate_ctrl)
 322                         fe->ops.i2c_gate_ctrl(fe, 1);
 323                 fe->ops.tuner_ops.init(fe);
 324                 if (fe->ops.i2c_gate_ctrl)
 325                         fe->ops.i2c_gate_ctrl(fe, 0);
 326         }
 327 }
 328
 329 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 330 {
 331         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 332
 333         fepriv->reinitialise = 1;
 334         dvb_frontend_wakeup(fe);
 335 }
 336 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 337
 338 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 339 {
 340         int q2;
 341         struct dvb_frontend *fe = fepriv->dvbdev->priv;
 342
 343         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 344
 345         if (locked)
 346                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 347         else
 348                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 349
 350         q2 = fepriv->quality - 128;
 351         q2 *= q2;
 352
 353         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 354 }
 355
 356 /**
 357  * Performs automatic twiddling of frontend parameters.
 358  *
 359  * @param fe The frontend concerned.
 360  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 361  * @returns Number of complete iterations that have been performed.
 362  */
 363 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 364 {
 365         int autoinversion;
 366         int ready = 0;
 367         int fe_set_err = 0;
 368         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 369         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 370         int original_inversion = c->inversion;
 371         u32 original_frequency = c->frequency;
 372
 373         /* are we using autoinversion? */
 374         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 375                          (c->inversion == INVERSION_AUTO));
 376
 377         /* setup parameters correctly */
 378         while(!ready) {
 379                 /* calculate the lnb_drift */
 380                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 381
 382                 /* wrap the auto_step if we've exceeded the maximum drift */
 383                 if (fepriv->lnb_drift > fepriv->max_drift) {
 384                         fepriv->auto_step = 0;
 385                         fepriv->auto_sub_step = 0;
 386                         fepriv->lnb_drift = 0;
 387                 }
 388
 389                 /* perform inversion and +/- zigzag */
 390                 switch(fepriv->auto_sub_step) {
 391                 case 0:
 392                         /* try with the current inversion and current drift setting */
 393                         ready = 1;
 394                         break;
 395
 396                 case 1:
 397                         if (!autoinversion) break;
 398
 399                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 400                         ready = 1;
 401                         break;
 402
 403                 case 2:
 404                         if (fepriv->lnb_drift == 0) break;
 405
 406                         fepriv->lnb_drift = -fepriv->lnb_drift;
 407                         ready = 1;
 408                         break;
 409
 410                 case 3:
 411                         if (fepriv->lnb_drift == 0) break;
 412                         if (!autoinversion) break;
 413
 414                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 415                         fepriv->lnb_drift = -fepriv->lnb_drift;
 416                         ready = 1;
 417                         break;
 418
 419                 default:
 420                         fepriv->auto_step++;
 421                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 422                         break;
 423                 }
 424
 425                 if (!ready) fepriv->auto_sub_step++;
 426         }
 427
 428         /* if this attempt would hit where we started, indicate a complete
 429          * iteration has occurred */
 430         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 431             (fepriv->auto_sub_step == 0) && check_wrapped) {
 432                 return 1;
 433         }
 434
 435         dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
 436                         "auto_sub_step:%i started_auto_step:%i\n",
 437                         __func__, fepriv->lnb_drift, fepriv->inversion,
 438                         fepriv->auto_step, fepriv->auto_sub_step,
 439                         fepriv->started_auto_step);
 440
 441         /* set the frontend itself */
 442         c->frequency += fepriv->lnb_drift;
 443         if (autoinversion)
 444                 c->inversion = fepriv->inversion;
 445         tmp = *c;
 446         if (fe->ops.set_frontend)
 447                 fe_set_err = fe->ops.set_frontend(fe);
 448         *c = tmp;
 449         if (fe_set_err < 0) {
 450                 fepriv->state = FESTATE_ERROR;
 451                 return fe_set_err;
 452         }
 453
 454         c->frequency = original_frequency;
 455         c->inversion = original_inversion;
 456
 457         fepriv->auto_sub_step++;
 458         return 0;
 459 }
 460
 461 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 462 {
 463         enum fe_status s = 0;
 464         int retval = 0;
 465         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 466         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 467
 468         /* if we've got no parameters, just keep idling */
 469         if (fepriv->state & FESTATE_IDLE) {
 470                 fepriv->delay = 3*HZ;
 471                 fepriv->quality = 0;
 472                 return;
 473         }
 474
 475         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 476         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 477                 if (fepriv->state & FESTATE_RETUNE) {
 478                         tmp = *c;
 479                         if (fe->ops.set_frontend)
 480                                 retval = fe->ops.set_frontend(fe);
 481                         *c = tmp;
 482                         if (retval < 0)
 483                                 fepriv->state = FESTATE_ERROR;
 484                         else
 485                                 fepriv->state = FESTATE_TUNED;
 486                 }
 487                 fepriv->delay = 3*HZ;
 488                 fepriv->quality = 0;
 489                 return;
 490         }
 491
 492         /* get the frontend status */
 493         if (fepriv->state & FESTATE_RETUNE) {
 494                 s = 0;
 495         } else {
 496                 if (fe->ops.read_status)
 497                         fe->ops.read_status(fe, &s);
 498                 if (s != fepriv->status) {
 499                         dvb_frontend_add_event(fe, s);
 500                         fepriv->status = s;
 501                 }
 502         }
 503
 504         /* if we're not tuned, and we have a lock, move to the TUNED state */
 505         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 506                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 507                 fepriv->state = FESTATE_TUNED;
 508
 509                 /* if we're tuned, then we have determined the correct inversion */
 510                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 511                     (c->inversion == INVERSION_AUTO)) {
 512                         c->inversion = fepriv->inversion;
 513                 }
 514                 return;
 515         }
 516
 517         /* if we are tuned already, check we're still locked */
 518         if (fepriv->state & FESTATE_TUNED) {
 519                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 520
 521                 /* we're tuned, and the lock is still good... */
 522                 if (s & FE_HAS_LOCK) {
 523                         return;
 524                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 525                         fepriv->state = FESTATE_ZIGZAG_FAST;
 526                         fepriv->started_auto_step = fepriv->auto_step;
 527                         fepriv->check_wrapped = 0;
 528                 }
 529         }
 530
 531         /* don't actually do anything if we're in the LOSTLOCK state,
 532          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 533         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 534             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 535                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 536                 return;
 537         }
 538
 539         /* don't do anything if we're in the DISEQC state, since this
 540          * might be someone with a motorized dish controlled by DISEQC.
 541          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 542         if (fepriv->state & FESTATE_DISEQC) {
 543                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 544                 return;
 545         }
 546
 547         /* if we're in the RETUNE state, set everything up for a brand
 548          * new scan, keeping the current inversion setting, as the next
 549          * tune is _very_ likely to require the same */
 550         if (fepriv->state & FESTATE_RETUNE) {
 551                 fepriv->lnb_drift = 0;
 552                 fepriv->auto_step = 0;
 553                 fepriv->auto_sub_step = 0;
 554                 fepriv->started_auto_step = 0;
 555                 fepriv->check_wrapped = 0;
 556         }
 557
 558         /* fast zigzag. */
 559         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 560                 fepriv->delay = fepriv->min_delay;
 561
 562                 /* perform a tune */
 563                 retval = dvb_frontend_swzigzag_autotune(fe,
 564                                                         fepriv->check_wrapped);
 565                 if (retval < 0) {
 566                         return;
 567                 } else if (retval) {
 568                         /* OK, if we've run out of trials at the fast speed.
 569                          * Drop back to slow for the _next_ attempt */
 570                         fepriv->state = FESTATE_SEARCHING_SLOW;
 571                         fepriv->started_auto_step = fepriv->auto_step;
 572                         return;
 573                 }
 574                 fepriv->check_wrapped = 1;
 575
 576                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 577                  * This ensures we cannot return from an
 578                  * FE_SET_FRONTEND ioctl before the first frontend tune
 579                  * occurs */
 580                 if (fepriv->state & FESTATE_RETUNE) {
 581                         fepriv->state = FESTATE_TUNING_FAST;
 582                 }
 583         }
 584
 585         /* slow zigzag */
 586         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 587                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 588
 589                 /* Note: don't bother checking for wrapping; we stay in this
 590                  * state until we get a lock */
 591                 dvb_frontend_swzigzag_autotune(fe, 0);
 592         }
 593 }
 594
 595 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 596 {
 597         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 598
 599         if (fe->exit != DVB_FE_NO_EXIT)
 600                 return 1;
 601
 602         if (fepriv->dvbdev->writers == 1)
 603                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 604                                   dvb_shutdown_timeout * HZ))
 605                         return 1;
 606
 607         return 0;
 608 }
 609
 610 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 611 {
 612         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 613
 614         if (fepriv->wakeup) {
 615                 fepriv->wakeup = 0;
 616                 return 1;
 617         }
 618         return dvb_frontend_is_exiting(fe);
 619 }
 620
 621 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 622 {
 623         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 624
 625         fepriv->wakeup = 1;
 626         wake_up_interruptible(&fepriv->wait_queue);
 627 }
 628
 629 static int dvb_frontend_thread(void *data)
 630 {
 631         struct dvb_frontend *fe = data;
 632         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 633         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 634         enum fe_status s;
 635         enum dvbfe_algo algo;
 636         bool re_tune = false;
 637         bool semheld = false;
 638
 639         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 640
 641         fepriv->check_wrapped = 0;
 642         fepriv->quality = 0;
 643         fepriv->delay = 3*HZ;
 644         fepriv->status = 0;
 645         fepriv->wakeup = 0;
 646         fepriv->reinitialise = 0;
 647
 648         dvb_frontend_init(fe);
 649
 650         set_freezable();
 651         while (1) {
 652                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 653 restart:
 654                 wait_event_interruptible_timeout(fepriv->wait_queue,
 655                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 656                                 || freezing(current),
 657                         fepriv->delay);
 658
 659                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 660                         /* got signal or quitting */
 661                         if (!down_interruptible(&fepriv->sem))
 662                                 semheld = true;
 663                         fe->exit = DVB_FE_NORMAL_EXIT;
 664                         break;
 665                 }
 666
 667                 if (try_to_freeze())
 668                         goto restart;
 669
 670                 if (down_interruptible(&fepriv->sem))
 671                         break;
 672
 673                 if (fepriv->reinitialise) {
 674                         dvb_frontend_init(fe);
 675                         if (fe->ops.set_tone && fepriv->tone != -1)
 676                                 fe->ops.set_tone(fe, fepriv->tone);
 677                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 678                                 fe->ops.set_voltage(fe, fepriv->voltage);
 679                         fepriv->reinitialise = 0;
 680                 }
 681
 682                 /* do an iteration of the tuning loop */
 683                 if (fe->ops.get_frontend_algo) {
 684                         algo = fe->ops.get_frontend_algo(fe);
 685                         switch (algo) {
 686                         case DVBFE_ALGO_HW:
 687                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 688
 689                                 if (fepriv->state & FESTATE_RETUNE) {
 690                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
 691                                         re_tune = true;
 692                                         fepriv->state = FESTATE_TUNED;
 693                                 } else {
 694                                         re_tune = false;
 695                                 }
 696
 697                                 if (fe->ops.tune)
 698                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 699
 700                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 701                                         dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
 702                                         dvb_frontend_add_event(fe, s);
 703                                         fepriv->status = s;
 704                                 }
 705                                 break;
 706                         case DVBFE_ALGO_SW:
 707                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 708                                 dvb_frontend_swzigzag(fe);
 709                                 break;
 710                         case DVBFE_ALGO_CUSTOM:
 711                                 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 712                                 if (fepriv->state & FESTATE_RETUNE) {
 713                                         dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
 714                                         fepriv->state = FESTATE_TUNED;
 715                                 }
 716                                 /* Case where we are going to search for a carrier
 717                                  * User asked us to retune again for some reason, possibly
 718                                  * requesting a search with a new set of parameters
 719                                  */
 720                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 721                                         if (fe->ops.search) {
 722                                                 fepriv->algo_status = fe->ops.search(fe);
 723                                                 /* We did do a search as was requested, the flags are
 724                                                  * now unset as well and has the flags wrt to search.
 725                                                  */
 726                                         } else {
 727                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 728                                         }
 729                                 }
 730                                 /* Track the carrier if the search was successful */
 731                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 732                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 733                                         fepriv->delay = HZ / 2;
 734                                 }
 735                                 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
 736                                 fe->ops.read_status(fe, &s);
 737                                 if (s != fepriv->status) {
 738                                         dvb_frontend_add_event(fe, s); /* update event list */
 739                                         fepriv->status = s;
 740                                         if (!(s & FE_HAS_LOCK)) {
 741                                                 fepriv->delay = HZ / 10;
 742                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 743                                         } else {
 744                                                 fepriv->delay = 60 * HZ;
 745                                         }
 746                                 }
 747                                 break;
 748                         default:
 749                                 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
 750                                 break;
 751                         }
 752                 } else {
 753                         dvb_frontend_swzigzag(fe);
 754                 }
 755         }
 756
 757         if (dvb_powerdown_on_sleep) {
 758                 if (fe->ops.set_voltage)
 759                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 760                 if (fe->ops.tuner_ops.sleep) {
 761                         if (fe->ops.i2c_gate_ctrl)
 762                                 fe->ops.i2c_gate_ctrl(fe, 1);
 763                         fe->ops.tuner_ops.sleep(fe);
 764                         if (fe->ops.i2c_gate_ctrl)
 765                                 fe->ops.i2c_gate_ctrl(fe, 0);
 766                 }
 767                 if (fe->ops.sleep)
 768                         fe->ops.sleep(fe);
 769         }
 770
 771         fepriv->thread = NULL;
 772         if (kthread_should_stop())
 773                 fe->exit = DVB_FE_DEVICE_REMOVED;
 774         else
 775                 fe->exit = DVB_FE_NO_EXIT;
 776         mb();
 777
 778         if (semheld)
 779                 up(&fepriv->sem);
 780         dvb_frontend_wakeup(fe);
 781         return 0;
 782 }
 783
 784 static void dvb_frontend_stop(struct dvb_frontend *fe)
 785 {
 786         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 787
 788         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 789
 790         if (fe->exit != DVB_FE_DEVICE_REMOVED)
 791                 fe->exit = DVB_FE_NORMAL_EXIT;
 792         mb();
 793
 794         if (!fepriv->thread)
 795                 return;
 796
 797         kthread_stop(fepriv->thread);
 798
 799         sema_init(&fepriv->sem, 1);
 800         fepriv->state = FESTATE_IDLE;
 801
 802         /* paranoia check in case a signal arrived */
 803         if (fepriv->thread)
 804                 dev_warn(fe->dvb->device,
 805                                 "dvb_frontend_stop: warning: thread %p won't exit\n",
 806                                 fepriv->thread);
 807 }
 808
 809 /*
 810  * Sleep for the amount of time given by add_usec parameter
 811  *
 812  * This needs to be as precise as possible, as it affects the detection of
 813  * the dish tone command at the satellite subsystem. The precision is improved
 814  * by using a scheduled msleep followed by udelay for the remainder.
 815  */
 816 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
 817 {
 818         s32 delta;
 819
 820         *waketime = ktime_add_us(*waketime, add_usec);
 821         delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 822         if (delta > 2500) {
 823                 msleep((delta - 1500) / 1000);
 824                 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
 825         }
 826         if (delta > 0)
 827                 udelay(delta);
 828 }
 829 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 830
 831 static int dvb_frontend_start(struct dvb_frontend *fe)
 832 {
 833         int ret;
 834         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 835         struct task_struct *fe_thread;
 836
 837         dev_dbg(fe->dvb->device, "%s:\n", __func__);
 838
 839         if (fepriv->thread) {
 840                 if (fe->exit == DVB_FE_NO_EXIT)
 841                         return 0;
 842                 else
 843                         dvb_frontend_stop (fe);
 844         }
 845
 846         if (signal_pending(current))
 847                 return -EINTR;
 848         if (down_interruptible (&fepriv->sem))
 849                 return -EINTR;
 850
 851         fepriv->state = FESTATE_IDLE;
 852         fe->exit = DVB_FE_NO_EXIT;
 853         fepriv->thread = NULL;
 854         mb();
 855
 856         fe_thread = kthread_run(dvb_frontend_thread, fe,
 857                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 858         if (IS_ERR(fe_thread)) {
 859                 ret = PTR_ERR(fe_thread);
 860                 dev_warn(fe->dvb->device,
 861                                 "dvb_frontend_start: failed to start kthread (%d)\n",
 862                                 ret);
 863                 up(&fepriv->sem);
 864                 return ret;
 865         }
 866         fepriv->thread = fe_thread;
 867         return 0;
 868 }
 869
 870 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 871                                         u32 *freq_min, u32 *freq_max)
 872 {
 873         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 874
 875         if (fe->ops.info.frequency_max == 0)
 876                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 877         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 878                 *freq_max = fe->ops.info.frequency_max;
 879         else
 880                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 881
 882         if (*freq_min == 0 || *freq_max == 0)
 883                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 884                                 fe->dvb->num, fe->id);
 885 }
 886
 887 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 888 {
 889         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 890         u32 freq_min;
 891         u32 freq_max;
 892
 893         /* range check: frequency */
 894         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 895         if ((freq_min && c->frequency < freq_min) ||
 896             (freq_max && c->frequency > freq_max)) {
 897                 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 898                                 fe->dvb->num, fe->id, c->frequency,
 899                                 freq_min, freq_max);
 900                 return -EINVAL;
 901         }
 902
 903         /* range check: symbol rate */
 904         switch (c->delivery_system) {
 905         case SYS_DVBS:
 906         case SYS_DVBS2:
 907         case SYS_TURBO:
 908         case SYS_DVBC_ANNEX_A:
 909         case SYS_DVBC_ANNEX_C:
 910                 if ((fe->ops.info.symbol_rate_min &&
 911                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 912                     (fe->ops.info.symbol_rate_max &&
 913                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 914                         dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 915                                         fe->dvb->num, fe->id, c->symbol_rate,
 916                                         fe->ops.info.symbol_rate_min,
 917                                         fe->ops.info.symbol_rate_max);
 918                         return -EINVAL;
 919                 }
 920         default:
 921                 break;
 922         }
 923
 924         return 0;
 925 }
 926
 927 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 928 {
 929         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 930         int i;
 931         u32 delsys;
 932
 933         delsys = c->delivery_system;
 934         memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
 935         c->delivery_system = delsys;
 936
 937         c->state = DTV_CLEAR;
 938
 939         dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
 940                         __func__, c->delivery_system);
 941
 942         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 943         c->bandwidth_hz = 0;    /* AUTO */
 944         c->guard_interval = GUARD_INTERVAL_AUTO;
 945         c->hierarchy = HIERARCHY_AUTO;
 946         c->symbol_rate = 0;
 947         c->code_rate_HP = FEC_AUTO;
 948         c->code_rate_LP = FEC_AUTO;
 949         c->fec_inner = FEC_AUTO;
 950         c->rolloff = ROLLOFF_AUTO;
 951         c->voltage = SEC_VOLTAGE_OFF;
 952         c->sectone = SEC_TONE_OFF;
 953         c->pilot = PILOT_AUTO;
 954
 955         c->isdbt_partial_reception = 0;
 956         c->isdbt_sb_mode = 0;
 957         c->isdbt_sb_subchannel = 0;
 958         c->isdbt_sb_segment_idx = 0;
 959         c->isdbt_sb_segment_count = 0;
 960         c->isdbt_layer_enabled = 0;
 961         for (i = 0; i < 3; i++) {
 962                 c->layer[i].fec = FEC_AUTO;
 963                 c->layer[i].modulation = QAM_AUTO;
 964                 c->layer[i].interleaving = 0;
 965                 c->layer[i].segment_count = 0;
 966         }
 967
 968         c->stream_id = NO_STREAM_ID_FILTER;
 969
 970         switch (c->delivery_system) {
 971         case SYS_DVBS:
 972         case SYS_DVBS2:
 973         case SYS_TURBO:
 974                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 975                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 976                 break;
 977         case SYS_ATSC:
 978                 c->modulation = VSB_8;
 979                 break;
 980         case SYS_ISDBS:
 981                 c->symbol_rate = 28860000;
 982                 c->rolloff = ROLLOFF_35;
 983                 c->bandwidth_hz = c->symbol_rate / 100 * 135;
 984                 break;
 985         default:
 986                 c->modulation = QAM_AUTO;
 987                 break;
 988         }
 989
 990         c->lna = LNA_AUTO;
 991
 992         return 0;
 993 }
 994
 995 #define _DTV_CMD(n, s, b) \
 996 [n] = { \
 997         .name = #n, \
 998         .cmd  = n, \
 999         .set  = s,\
1000         .buffer = b \
1001 }
1002
1003 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1004         _DTV_CMD(DTV_TUNE, 1, 0),
1005         _DTV_CMD(DTV_CLEAR, 1, 0),
1006
1007         /* Set */
1008         _DTV_CMD(DTV_FREQUENCY, 1, 0),
1009         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1010         _DTV_CMD(DTV_MODULATION, 1, 0),
1011         _DTV_CMD(DTV_INVERSION, 1, 0),
1012         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1013         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1014         _DTV_CMD(DTV_INNER_FEC, 1, 0),
1015         _DTV_CMD(DTV_VOLTAGE, 1, 0),
1016         _DTV_CMD(DTV_TONE, 1, 0),
1017         _DTV_CMD(DTV_PILOT, 1, 0),
1018         _DTV_CMD(DTV_ROLLOFF, 1, 0),
1019         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1020         _DTV_CMD(DTV_HIERARCHY, 1, 0),
1021         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1022         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1023         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1024         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1025         _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1026
1027         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1028         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1029         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1030         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1031         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1032         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1033         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1034         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1035         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1036         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1037         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1038         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1039         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1040         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1041         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1042         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1043         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1044         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1045
1046         _DTV_CMD(DTV_STREAM_ID, 1, 0),
1047         _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1048         _DTV_CMD(DTV_LNA, 1, 0),
1049
1050         /* Get */
1051         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1052         _DTV_CMD(DTV_API_VERSION, 0, 0),
1053
1054         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1055
1056         _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1057         _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1058
1059         _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1060         _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1061         _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1062         _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1063         _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1064         _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1065         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1066         _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1067         _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1068         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1069         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1070         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1071         _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1072
1073         /* Statistics API */
1074         _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1075         _DTV_CMD(DTV_STAT_CNR, 0, 0),
1076         _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1077         _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1078         _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1079         _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1080         _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1081         _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1082 };
1083
1084 static void dtv_property_dump(struct dvb_frontend *fe,
1085                               bool is_set,
1086                               struct dtv_property *tvp)
1087 {
1088         int i;
1089
1090         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1091                 dev_warn(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x undefined\n",
1092                                 __func__,
1093                                 is_set ? "SET" : "GET",
1094                                 tvp->cmd);
1095                 return;
1096         }
1097
1098         dev_dbg(fe->dvb->device, "%s: %s tvp.cmd    = 0x%08x (%s)\n", __func__,
1099                 is_set ? "SET" : "GET",
1100                 tvp->cmd,
1101                 dtv_cmds[tvp->cmd].name);
1102
1103         if (dtv_cmds[tvp->cmd].buffer) {
1104                 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1105                         __func__, tvp->u.buffer.len);
1106
1107                 for(i = 0; i < tvp->u.buffer.len; i++)
1108                         dev_dbg(fe->dvb->device,
1109                                         "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1110                                         __func__, i, tvp->u.buffer.data[i]);
1111         } else {
1112                 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1113                                 tvp->u.data);
1114         }
1115 }
1116
1117 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1118  * drivers can use a single set_frontend tuning function, regardless of whether
1119  * it's being used for the legacy or new API, reducing code and complexity.
1120  */
1121 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1122                                    struct dtv_frontend_properties *c,
1123                                    const struct dvb_frontend_parameters *p)
1124 {
1125         c->frequency = p->frequency;
1126         c->inversion = p->inversion;
1127
1128         switch (dvbv3_type(c->delivery_system)) {
1129         case DVBV3_QPSK:
1130                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1131                 c->symbol_rate = p->u.qpsk.symbol_rate;
1132                 c->fec_inner = p->u.qpsk.fec_inner;
1133                 break;
1134         case DVBV3_QAM:
1135                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1136                 c->symbol_rate = p->u.qam.symbol_rate;
1137                 c->fec_inner = p->u.qam.fec_inner;
1138                 c->modulation = p->u.qam.modulation;
1139                 break;
1140         case DVBV3_OFDM:
1141                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1142
1143                 switch (p->u.ofdm.bandwidth) {
1144                 case BANDWIDTH_10_MHZ:
1145                         c->bandwidth_hz = 10000000;
1146                         break;
1147                 case BANDWIDTH_8_MHZ:
1148                         c->bandwidth_hz = 8000000;
1149                         break;
1150                 case BANDWIDTH_7_MHZ:
1151                         c->bandwidth_hz = 7000000;
1152                         break;
1153                 case BANDWIDTH_6_MHZ:
1154                         c->bandwidth_hz = 6000000;
1155                         break;
1156                 case BANDWIDTH_5_MHZ:
1157                         c->bandwidth_hz = 5000000;
1158                         break;
1159                 case BANDWIDTH_1_712_MHZ:
1160                         c->bandwidth_hz = 1712000;
1161                         break;
1162                 case BANDWIDTH_AUTO:
1163                         c->bandwidth_hz = 0;
1164                 }
1165
1166                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1167                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1168                 c->modulation = p->u.ofdm.constellation;
1169                 c->transmission_mode = p->u.ofdm.transmission_mode;
1170                 c->guard_interval = p->u.ofdm.guard_interval;
1171                 c->hierarchy = p->u.ofdm.hierarchy_information;
1172                 break;
1173         case DVBV3_ATSC:
1174                 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1175                 c->modulation = p->u.vsb.modulation;
1176                 if (c->delivery_system == SYS_ATSCMH)
1177                         break;
1178                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1179                         c->delivery_system = SYS_ATSC;
1180                 else
1181                         c->delivery_system = SYS_DVBC_ANNEX_B;
1182                 break;
1183         case DVBV3_UNKNOWN:
1184                 dev_err(fe->dvb->device,
1185                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1186                                 __func__, c->delivery_system);
1187                 return -EINVAL;
1188         }
1189
1190         return 0;
1191 }
1192
1193 /* Ensure the cached values are set correctly in the frontend
1194  * legacy tuning structures, for the advanced tuning API.
1195  */
1196 static int
1197 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1198                                 const struct dtv_frontend_properties *c,
1199                                 struct dvb_frontend_parameters *p)
1200 {
1201         p->frequency = c->frequency;
1202         p->inversion = c->inversion;
1203
1204         switch (dvbv3_type(c->delivery_system)) {
1205         case DVBV3_UNKNOWN:
1206                 dev_err(fe->dvb->device,
1207                                 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1208                                 __func__, c->delivery_system);
1209                 return -EINVAL;
1210         case DVBV3_QPSK:
1211                 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1212                 p->u.qpsk.symbol_rate = c->symbol_rate;
1213                 p->u.qpsk.fec_inner = c->fec_inner;
1214                 break;
1215         case DVBV3_QAM:
1216                 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1217                 p->u.qam.symbol_rate = c->symbol_rate;
1218                 p->u.qam.fec_inner = c->fec_inner;
1219                 p->u.qam.modulation = c->modulation;
1220                 break;
1221         case DVBV3_OFDM:
1222                 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1223                 switch (c->bandwidth_hz) {
1224                 case 10000000:
1225                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1226                         break;
1227                 case 8000000:
1228                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1229                         break;
1230                 case 7000000:
1231                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1232                         break;
1233                 case 6000000:
1234                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1235                         break;
1236                 case 5000000:
1237                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1238                         break;
1239                 case 1712000:
1240                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1241                         break;
1242                 case 0:
1243                 default:
1244                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1245                 }
1246                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1247                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1248                 p->u.ofdm.constellation = c->modulation;
1249                 p->u.ofdm.transmission_mode = c->transmission_mode;
1250                 p->u.ofdm.guard_interval = c->guard_interval;
1251                 p->u.ofdm.hierarchy_information = c->hierarchy;
1252                 break;
1253         case DVBV3_ATSC:
1254                 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1255                 p->u.vsb.modulation = c->modulation;
1256                 break;
1257         }
1258         return 0;
1259 }
1260
1261 /**
1262  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1263  * @fe:         struct dvb_frontend pointer
1264  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1265  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1266  *
1267  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1268  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1269  * If p_out is not null, it will update the DVBv3 params pointed by it.
1270  */
1271 static int dtv_get_frontend(struct dvb_frontend *fe,
1272                             struct dtv_frontend_properties *c,
1273                             struct dvb_frontend_parameters *p_out)
1274 {
1275         int r;
1276
1277         if (fe->ops.get_frontend) {
1278                 r = fe->ops.get_frontend(fe, c);
1279                 if (unlikely(r < 0))
1280                         return r;
1281                 if (p_out)
1282                         dtv_property_legacy_params_sync(fe, c, p_out);
1283                 return 0;
1284         }
1285
1286         /* As everything is in cache, get_frontend fops are always supported */
1287         return 0;
1288 }
1289
1290 static int dvb_frontend_ioctl_legacy(struct file *file,
1291                         unsigned int cmd, void *parg);
1292 static int dvb_frontend_ioctl_properties(struct file *file,
1293                         unsigned int cmd, void *parg);
1294
1295 static int dtv_property_process_get(struct dvb_frontend *fe,
1296                                     const struct dtv_frontend_properties *c,
1297                                     struct dtv_property *tvp,
1298                                     struct file *file)
1299 {
1300         int r, ncaps;
1301
1302         switch(tvp->cmd) {
1303         case DTV_ENUM_DELSYS:
1304                 ncaps = 0;
1305                 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1306                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1307                         ncaps++;
1308                 }
1309                 tvp->u.buffer.len = ncaps;
1310                 break;
1311         case DTV_FREQUENCY:
1312                 tvp->u.data = c->frequency;
1313                 break;
1314         case DTV_MODULATION:
1315                 tvp->u.data = c->modulation;
1316                 break;
1317         case DTV_BANDWIDTH_HZ:
1318                 tvp->u.data = c->bandwidth_hz;
1319                 break;
1320         case DTV_INVERSION:
1321                 tvp->u.data = c->inversion;
1322                 break;
1323         case DTV_SYMBOL_RATE:
1324                 tvp->u.data = c->symbol_rate;
1325                 break;
1326         case DTV_INNER_FEC:
1327                 tvp->u.data = c->fec_inner;
1328                 break;
1329         case DTV_PILOT:
1330                 tvp->u.data = c->pilot;
1331                 break;
1332         case DTV_ROLLOFF:
1333                 tvp->u.data = c->rolloff;
1334                 break;
1335         case DTV_DELIVERY_SYSTEM:
1336                 tvp->u.data = c->delivery_system;
1337                 break;
1338         case DTV_VOLTAGE:
1339                 tvp->u.data = c->voltage;
1340                 break;
1341         case DTV_TONE:
1342                 tvp->u.data = c->sectone;
1343                 break;
1344         case DTV_API_VERSION:
1345                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1346                 break;
1347         case DTV_CODE_RATE_HP:
1348                 tvp->u.data = c->code_rate_HP;
1349                 break;
1350         case DTV_CODE_RATE_LP:
1351                 tvp->u.data = c->code_rate_LP;
1352                 break;
1353         case DTV_GUARD_INTERVAL:
1354                 tvp->u.data = c->guard_interval;
1355                 break;
1356         case DTV_TRANSMISSION_MODE:
1357                 tvp->u.data = c->transmission_mode;
1358                 break;
1359         case DTV_HIERARCHY:
1360                 tvp->u.data = c->hierarchy;
1361                 break;
1362         case DTV_INTERLEAVING:
1363                 tvp->u.data = c->interleaving;
1364                 break;
1365
1366         /* ISDB-T Support here */
1367         case DTV_ISDBT_PARTIAL_RECEPTION:
1368                 tvp->u.data = c->isdbt_partial_reception;
1369                 break;
1370         case DTV_ISDBT_SOUND_BROADCASTING:
1371                 tvp->u.data = c->isdbt_sb_mode;
1372                 break;
1373         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1374                 tvp->u.data = c->isdbt_sb_subchannel;
1375                 break;
1376         case DTV_ISDBT_SB_SEGMENT_IDX:
1377                 tvp->u.data = c->isdbt_sb_segment_idx;
1378                 break;
1379         case DTV_ISDBT_SB_SEGMENT_COUNT:
1380                 tvp->u.data = c->isdbt_sb_segment_count;
1381                 break;
1382         case DTV_ISDBT_LAYER_ENABLED:
1383                 tvp->u.data = c->isdbt_layer_enabled;
1384                 break;
1385         case DTV_ISDBT_LAYERA_FEC:
1386                 tvp->u.data = c->layer[0].fec;
1387                 break;
1388         case DTV_ISDBT_LAYERA_MODULATION:
1389                 tvp->u.data = c->layer[0].modulation;
1390                 break;
1391         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1392                 tvp->u.data = c->layer[0].segment_count;
1393                 break;
1394         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1395                 tvp->u.data = c->layer[0].interleaving;
1396                 break;
1397         case DTV_ISDBT_LAYERB_FEC:
1398                 tvp->u.data = c->layer[1].fec;
1399                 break;
1400         case DTV_ISDBT_LAYERB_MODULATION:
1401                 tvp->u.data = c->layer[1].modulation;
1402                 break;
1403         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1404                 tvp->u.data = c->layer[1].segment_count;
1405                 break;
1406         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1407                 tvp->u.data = c->layer[1].interleaving;
1408                 break;
1409         case DTV_ISDBT_LAYERC_FEC:
1410                 tvp->u.data = c->layer[2].fec;
1411                 break;
1412         case DTV_ISDBT_LAYERC_MODULATION:
1413                 tvp->u.data = c->layer[2].modulation;
1414                 break;
1415         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1416                 tvp->u.data = c->layer[2].segment_count;
1417                 break;
1418         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1419                 tvp->u.data = c->layer[2].interleaving;
1420                 break;
1421
1422         /* Multistream support */
1423         case DTV_STREAM_ID:
1424         case DTV_DVBT2_PLP_ID_LEGACY:
1425                 tvp->u.data = c->stream_id;
1426                 break;
1427
1428         /* ATSC-MH */
1429         case DTV_ATSCMH_FIC_VER:
1430                 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1431                 break;
1432         case DTV_ATSCMH_PARADE_ID:
1433                 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1434                 break;
1435         case DTV_ATSCMH_NOG:
1436                 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1437                 break;
1438         case DTV_ATSCMH_TNOG:
1439                 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1440                 break;
1441         case DTV_ATSCMH_SGN:
1442                 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1443                 break;
1444         case DTV_ATSCMH_PRC:
1445                 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1446                 break;
1447         case DTV_ATSCMH_RS_FRAME_MODE:
1448                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1449                 break;
1450         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1451                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1452                 break;
1453         case DTV_ATSCMH_RS_CODE_MODE_PRI:
1454                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1455                 break;
1456         case DTV_ATSCMH_RS_CODE_MODE_SEC:
1457                 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1458                 break;
1459         case DTV_ATSCMH_SCCC_BLOCK_MODE:
1460                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1461                 break;
1462         case DTV_ATSCMH_SCCC_CODE_MODE_A:
1463                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1464                 break;
1465         case DTV_ATSCMH_SCCC_CODE_MODE_B:
1466                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1467                 break;
1468         case DTV_ATSCMH_SCCC_CODE_MODE_C:
1469                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1470                 break;
1471         case DTV_ATSCMH_SCCC_CODE_MODE_D:
1472                 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1473                 break;
1474
1475         case DTV_LNA:
1476                 tvp->u.data = c->lna;
1477                 break;
1478
1479         /* Fill quality measures */
1480         case DTV_STAT_SIGNAL_STRENGTH:
1481                 tvp->u.st = c->strength;
1482                 break;
1483         case DTV_STAT_CNR:
1484                 tvp->u.st = c->cnr;
1485                 break;
1486         case DTV_STAT_PRE_ERROR_BIT_COUNT:
1487                 tvp->u.st = c->pre_bit_error;
1488                 break;
1489         case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1490                 tvp->u.st = c->pre_bit_count;
1491                 break;
1492         case DTV_STAT_POST_ERROR_BIT_COUNT:
1493                 tvp->u.st = c->post_bit_error;
1494                 break;
1495         case DTV_STAT_POST_TOTAL_BIT_COUNT:
1496                 tvp->u.st = c->post_bit_count;
1497                 break;
1498         case DTV_STAT_ERROR_BLOCK_COUNT:
1499                 tvp->u.st = c->block_error;
1500                 break;
1501         case DTV_STAT_TOTAL_BLOCK_COUNT:
1502                 tvp->u.st = c->block_count;
1503                 break;
1504         default:
1505                 dev_dbg(fe->dvb->device,
1506                         "%s: FE property %d doesn't exist\n",
1507                         __func__, tvp->cmd);
1508                 return -EINVAL;
1509         }
1510
1511         /* Allow the frontend to override outgoing properties */
1512         if (fe->ops.get_property) {
1513                 r = fe->ops.get_property(fe, tvp);
1514                 if (r < 0)
1515                         return r;
1516         }
1517
1518         dtv_property_dump(fe, false, tvp);
1519
1520         return 0;
1521 }
1522
1523 static int dtv_set_frontend(struct dvb_frontend *fe);
1524
1525 static bool is_dvbv3_delsys(u32 delsys)
1526 {
1527         return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1528                (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1529 }
1530
1531 /**
1532  * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1533  * @fe:                 struct frontend;
1534  * @delsys:                     DVBv5 type that will be used for emulation
1535  *
1536  * Provides emulation for delivery systems that are compatible with the old
1537  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1538  * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1539  * parameters are compatible with DVB-S spec.
1540  */
1541 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1542 {
1543         int i;
1544         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1545
1546         c->delivery_system = delsys;
1547
1548         /*
1549          * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1550          */
1551         if (c->delivery_system == SYS_ISDBT) {
1552                 dev_dbg(fe->dvb->device,
1553                         "%s: Using defaults for SYS_ISDBT\n",
1554                         __func__);
1555
1556                 if (!c->bandwidth_hz)
1557                         c->bandwidth_hz = 6000000;
1558
1559                 c->isdbt_partial_reception = 0;
1560                 c->isdbt_sb_mode = 0;
1561                 c->isdbt_sb_subchannel = 0;
1562                 c->isdbt_sb_segment_idx = 0;
1563                 c->isdbt_sb_segment_count = 0;
1564                 c->isdbt_layer_enabled = 7;
1565                 for (i = 0; i < 3; i++) {
1566                         c->layer[i].fec = FEC_AUTO;
1567                         c->layer[i].modulation = QAM_AUTO;
1568                         c->layer[i].interleaving = 0;
1569                         c->layer[i].segment_count = 0;
1570                 }
1571         }
1572         dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1573                 __func__, c->delivery_system);
1574
1575         return 0;
1576 }
1577
1578 /**
1579  * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1580  * @fe:                 frontend struct
1581  * @desired_system:     delivery system requested by the user
1582  *
1583  * A DVBv5 call know what's the desired system it wants. So, set it.
1584  *
1585  * There are, however, a few known issues with early DVBv5 applications that
1586  * are also handled by this logic:
1587  *
1588  * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1589  *    This is an API violation, but, as we don't want to break userspace,
1590  *    convert it to the first supported delivery system.
1591  * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1592  *    example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1593  *    ISDB-T provided backward compat with DVB-T.
1594  */
1595 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1596                                      u32 desired_system)
1597 {
1598         int ncaps;
1599         u32 delsys = SYS_UNDEFINED;
1600         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1601         enum dvbv3_emulation_type type;
1602
1603         /*
1604          * It was reported that some old DVBv5 applications were
1605          * filling delivery_system with SYS_UNDEFINED. If this happens,
1606          * assume that the application wants to use the first supported
1607          * delivery system.
1608          */
1609         if (desired_system == SYS_UNDEFINED)
1610                 desired_system = fe->ops.delsys[0];
1611
1612         /*
1613          * This is a DVBv5 call. So, it likely knows the supported
1614          * delivery systems. So, check if the desired delivery system is
1615          * supported
1616          */
1617         ncaps = 0;
1618         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1619                 if (fe->ops.delsys[ncaps] == desired_system) {
1620                         c->delivery_system = desired_system;
1621                         dev_dbg(fe->dvb->device,
1622                                         "%s: Changing delivery system to %d\n",
1623                                         __func__, desired_system);
1624                         return 0;
1625                 }
1626                 ncaps++;
1627         }
1628
1629         /*
1630          * The requested delivery system isn't supported. Maybe userspace
1631          * is requesting a DVBv3 compatible delivery system.
1632          *
1633          * The emulation only works if the desired system is one of the
1634          * delivery systems supported by DVBv3 API
1635          */
1636         if (!is_dvbv3_delsys(desired_system)) {
1637                 dev_dbg(fe->dvb->device,
1638                         "%s: Delivery system %d not supported.\n",
1639                         __func__, desired_system);
1640                 return -EINVAL;
1641         }
1642
1643         type = dvbv3_type(desired_system);
1644
1645         /*
1646         * Get the last non-DVBv3 delivery system that has the same type
1647         * of the desired system
1648         */
1649         ncaps = 0;
1650         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1651                 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1652                         delsys = fe->ops.delsys[ncaps];
1653                 ncaps++;
1654         }
1655
1656         /* There's nothing compatible with the desired delivery system */
1657         if (delsys == SYS_UNDEFINED) {
1658                 dev_dbg(fe->dvb->device,
1659                         "%s: Delivery system %d not supported on emulation mode.\n",
1660                         __func__, desired_system);
1661                 return -EINVAL;
1662         }
1663
1664         dev_dbg(fe->dvb->device,
1665                 "%s: Using delivery system %d emulated as if it were %d\n",
1666                 __func__, delsys, desired_system);
1667
1668         return emulate_delivery_system(fe, desired_system);
1669 }
1670
1671 /**
1672  * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1673  * @fe: frontend struct
1674  *
1675  * A DVBv3 call doesn't know what's the desired system it wants. It also
1676  * doesn't allow to switch between different types. Due to that, userspace
1677  * should use DVBv5 instead.
1678  * However, in order to avoid breaking userspace API, limited backward
1679  * compatibility support is provided.
1680  *
1681  * There are some delivery systems that are incompatible with DVBv3 calls.
1682  *
1683  * This routine should work fine for frontends that support just one delivery
1684  * system.
1685  *
1686  * For frontends that support multiple frontends:
1687  * 1) It defaults to use the first supported delivery system. There's an
1688  *    userspace application that allows changing it at runtime;
1689  *
1690  * 2) If the current delivery system is not compatible with DVBv3, it gets
1691  *    the first one that it is compatible.
1692  *
1693  * NOTE: in order for this to work with applications like Kaffeine that
1694  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1695  *      DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1696  *      SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1697  *      to DVB-S.
1698  */
1699 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1700 {
1701         int ncaps;
1702         u32 delsys = SYS_UNDEFINED;
1703         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1704
1705         /* If not set yet, defaults to the first supported delivery system */
1706         if (c->delivery_system == SYS_UNDEFINED)
1707                 c->delivery_system = fe->ops.delsys[0];
1708
1709         /*
1710          * Trivial case: just use the current one, if it already a DVBv3
1711          * delivery system
1712          */
1713         if (is_dvbv3_delsys(c->delivery_system)) {
1714                 dev_dbg(fe->dvb->device,
1715                                 "%s: Using delivery system to %d\n",
1716                                 __func__, c->delivery_system);
1717                 return 0;
1718         }
1719
1720         /*
1721          * Seek for the first delivery system that it is compatible with a
1722          * DVBv3 standard
1723          */
1724         ncaps = 0;
1725         while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1726                 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1727                         delsys = fe->ops.delsys[ncaps];
1728                         break;
1729                 }
1730                 ncaps++;
1731         }
1732         if (delsys == SYS_UNDEFINED) {
1733                 dev_dbg(fe->dvb->device,
1734                         "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1735                         __func__);
1736                 return -EINVAL;
1737         }
1738         return emulate_delivery_system(fe, delsys);
1739 }
1740
1741 static int dtv_property_process_set(struct dvb_frontend *fe,
1742                                     struct dtv_property *tvp,
1743                                     struct file *file)
1744 {
1745         int r = 0;
1746         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1747
1748         /* Allow the frontend to validate incoming properties */
1749         if (fe->ops.set_property) {
1750                 r = fe->ops.set_property(fe, tvp);
1751                 if (r < 0)
1752                         return r;
1753         }
1754
1755         dtv_property_dump(fe, true, tvp);
1756
1757         switch(tvp->cmd) {
1758         case DTV_CLEAR:
1759                 /*
1760                  * Reset a cache of data specific to the frontend here. This does
1761                  * not effect hardware.
1762                  */
1763                 dvb_frontend_clear_cache(fe);
1764                 break;
1765         case DTV_TUNE:
1766                 /* interpret the cache of data, build either a traditional frontend
1767                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1768                  * ioctl.
1769                  */
1770                 c->state = tvp->cmd;
1771                 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1772                                 __func__);
1773
1774                 r = dtv_set_frontend(fe);
1775                 break;
1776         case DTV_FREQUENCY:
1777                 c->frequency = tvp->u.data;
1778                 break;
1779         case DTV_MODULATION:
1780                 c->modulation = tvp->u.data;
1781                 break;
1782         case DTV_BANDWIDTH_HZ:
1783                 c->bandwidth_hz = tvp->u.data;
1784                 break;
1785         case DTV_INVERSION:
1786                 c->inversion = tvp->u.data;
1787                 break;
1788         case DTV_SYMBOL_RATE:
1789                 c->symbol_rate = tvp->u.data;
1790                 break;
1791         case DTV_INNER_FEC:
1792                 c->fec_inner = tvp->u.data;
1793                 break;
1794         case DTV_PILOT:
1795                 c->pilot = tvp->u.data;
1796                 break;
1797         case DTV_ROLLOFF:
1798                 c->rolloff = tvp->u.data;
1799                 break;
1800         case DTV_DELIVERY_SYSTEM:
1801                 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1802                 break;
1803         case DTV_VOLTAGE:
1804                 c->voltage = tvp->u.data;
1805                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1806                         (void *)c->voltage);
1807                 break;
1808         case DTV_TONE:
1809                 c->sectone = tvp->u.data;
1810                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1811                         (void *)c->sectone);
1812                 break;
1813         case DTV_CODE_RATE_HP:
1814                 c->code_rate_HP = tvp->u.data;
1815                 break;
1816         case DTV_CODE_RATE_LP:
1817                 c->code_rate_LP = tvp->u.data;
1818                 break;
1819         case DTV_GUARD_INTERVAL:
1820                 c->guard_interval = tvp->u.data;
1821                 break;
1822         case DTV_TRANSMISSION_MODE:
1823                 c->transmission_mode = tvp->u.data;
1824                 break;
1825         case DTV_HIERARCHY:
1826                 c->hierarchy = tvp->u.data;
1827                 break;
1828         case DTV_INTERLEAVING:
1829                 c->interleaving = tvp->u.data;
1830                 break;
1831
1832         /* ISDB-T Support here */
1833         case DTV_ISDBT_PARTIAL_RECEPTION:
1834                 c->isdbt_partial_reception = tvp->u.data;
1835                 break;
1836         case DTV_ISDBT_SOUND_BROADCASTING:
1837                 c->isdbt_sb_mode = tvp->u.data;
1838                 break;
1839         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1840                 c->isdbt_sb_subchannel = tvp->u.data;
1841                 break;
1842         case DTV_ISDBT_SB_SEGMENT_IDX:
1843                 c->isdbt_sb_segment_idx = tvp->u.data;
1844                 break;
1845         case DTV_ISDBT_SB_SEGMENT_COUNT:
1846                 c->isdbt_sb_segment_count = tvp->u.data;
1847                 break;
1848         case DTV_ISDBT_LAYER_ENABLED:
1849                 c->isdbt_layer_enabled = tvp->u.data;
1850                 break;
1851         case DTV_ISDBT_LAYERA_FEC:
1852                 c->layer[0].fec = tvp->u.data;
1853                 break;
1854         case DTV_ISDBT_LAYERA_MODULATION:
1855                 c->layer[0].modulation = tvp->u.data;
1856                 break;
1857         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1858                 c->layer[0].segment_count = tvp->u.data;
1859                 break;
1860         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1861                 c->layer[0].interleaving = tvp->u.data;
1862                 break;
1863         case DTV_ISDBT_LAYERB_FEC:
1864                 c->layer[1].fec = tvp->u.data;
1865                 break;
1866         case DTV_ISDBT_LAYERB_MODULATION:
1867                 c->layer[1].modulation = tvp->u.data;
1868                 break;
1869         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1870                 c->layer[1].segment_count = tvp->u.data;
1871                 break;
1872         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1873                 c->layer[1].interleaving = tvp->u.data;
1874                 break;
1875         case DTV_ISDBT_LAYERC_FEC:
1876                 c->layer[2].fec = tvp->u.data;
1877                 break;
1878         case DTV_ISDBT_LAYERC_MODULATION:
1879                 c->layer[2].modulation = tvp->u.data;
1880                 break;
1881         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1882                 c->layer[2].segment_count = tvp->u.data;
1883                 break;
1884         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1885                 c->layer[2].interleaving = tvp->u.data;
1886                 break;
1887
1888         /* Multistream support */
1889         case DTV_STREAM_ID:
1890         case DTV_DVBT2_PLP_ID_LEGACY:
1891                 c->stream_id = tvp->u.data;
1892                 break;
1893
1894         /* ATSC-MH */
1895         case DTV_ATSCMH_PARADE_ID:
1896                 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1897                 break;
1898         case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1899                 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1900                 break;
1901
1902         case DTV_LNA:
1903                 c->lna = tvp->u.data;
1904                 if (fe->ops.set_lna)
1905                         r = fe->ops.set_lna(fe);
1906                 if (r < 0)
1907                         c->lna = LNA_AUTO;
1908                 break;
1909
1910         default:
1911                 return -EINVAL;
1912         }
1913
1914         return r;
1915 }
1916
1917 static int dvb_frontend_ioctl(struct file *file,
1918                         unsigned int cmd, void *parg)
1919 {
1920         struct dvb_device *dvbdev = file->private_data;
1921         struct dvb_frontend *fe = dvbdev->priv;
1922         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1923         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1924         int err = -EOPNOTSUPP;
1925
1926         dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1927         if (down_interruptible(&fepriv->sem))
1928                 return -ERESTARTSYS;
1929
1930         if (fe->exit != DVB_FE_NO_EXIT) {
1931                 up(&fepriv->sem);
1932                 return -ENODEV;
1933         }
1934
1935         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1936             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1937              cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1938                 up(&fepriv->sem);
1939                 return -EPERM;
1940         }
1941
1942         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1943                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1944         else {
1945                 c->state = DTV_UNDEFINED;
1946                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1947         }
1948
1949         up(&fepriv->sem);
1950         return err;
1951 }
1952
1953 static int dvb_frontend_ioctl_properties(struct file *file,
1954                         unsigned int cmd, void *parg)
1955 {
1956         struct dvb_device *dvbdev = file->private_data;
1957         struct dvb_frontend *fe = dvbdev->priv;
1958         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1959         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1960         int err = 0;
1961
1962         struct dtv_properties *tvps = parg;
1963         struct dtv_property *tvp = NULL;
1964         int i;
1965
1966         dev_dbg(fe->dvb->device, "%s:\n", __func__);
1967
1968         if (cmd == FE_SET_PROPERTY) {
1969                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1970                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1971
1972                 /* Put an arbitrary limit on the number of messages that can
1973                  * be sent at once */
1974                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1975                         return -EINVAL;
1976
1977                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
1978                 if (IS_ERR(tvp))
1979                         return PTR_ERR(tvp);
1980
1981                 for (i = 0; i < tvps->num; i++) {
1982                         err = dtv_property_process_set(fe, tvp + i, file);
1983                         if (err < 0)
1984                                 goto out;
1985                         (tvp + i)->result = err;
1986                 }
1987
1988                 if (c->state == DTV_TUNE)
1989                         dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1990
1991         } else if (cmd == FE_GET_PROPERTY) {
1992                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
1993
1994                 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1995                 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1996
1997                 /* Put an arbitrary limit on the number of messages that can
1998                  * be sent at once */
1999                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2000                         return -EINVAL;
2001
2002                 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2003                 if (IS_ERR(tvp))
2004                         return PTR_ERR(tvp);
2005
2006                 /*
2007                  * Let's use our own copy of property cache, in order to
2008                  * avoid mangling with DTV zigzag logic, as drivers might
2009                  * return crap, if they don't check if the data is available
2010                  * before updating the properties cache.
2011                  */
2012                 if (fepriv->state != FESTATE_IDLE) {
2013                         err = dtv_get_frontend(fe, &getp, NULL);
2014                         if (err < 0)
2015                                 goto out;
2016                 }
2017                 for (i = 0; i < tvps->num; i++) {
2018                         err = dtv_property_process_get(fe, &getp, tvp + i, file);
2019                         if (err < 0)
2020                                 goto out;
2021                         (tvp + i)->result = err;
2022                 }
2023
2024                 if (copy_to_user((void __user *)tvps->props, tvp,
2025                                  tvps->num * sizeof(struct dtv_property))) {
2026                         err = -EFAULT;
2027                         goto out;
2028                 }
2029
2030         } else
2031                 err = -EOPNOTSUPP;
2032
2033 out:
2034         kfree(tvp);
2035         return err;
2036 }
2037
2038 static int dtv_set_frontend(struct dvb_frontend *fe)
2039 {
2040         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2041         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2042         struct dvb_frontend_tune_settings fetunesettings;
2043         u32 rolloff = 0;
2044
2045         if (dvb_frontend_check_parameters(fe) < 0)
2046                 return -EINVAL;
2047
2048         /*
2049          * Initialize output parameters to match the values given by
2050          * the user. FE_SET_FRONTEND triggers an initial frontend event
2051          * with status = 0, which copies output parameters to userspace.
2052          */
2053         dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2054
2055         /*
2056          * Be sure that the bandwidth will be filled for all
2057          * non-satellite systems, as tuners need to know what
2058          * low pass/Nyquist half filter should be applied, in
2059          * order to avoid inter-channel noise.
2060          *
2061          * ISDB-T and DVB-T/T2 already sets bandwidth.
2062          * ATSC and DVB-C don't set, so, the core should fill it.
2063          *
2064          * On DVB-C Annex A and C, the bandwidth is a function of
2065          * the roll-off and symbol rate. Annex B defines different
2066          * roll-off factors depending on the modulation. Fortunately,
2067          * Annex B is only used with 6MHz, so there's no need to
2068          * calculate it.
2069          *
2070          * While not officially supported, a side effect of handling it at
2071          * the cache level is that a program could retrieve the bandwidth
2072          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2073          */
2074         switch (c->delivery_system) {
2075         case SYS_ATSC:
2076         case SYS_DVBC_ANNEX_B:
2077                 c->bandwidth_hz = 6000000;
2078                 break;
2079         case SYS_DVBC_ANNEX_A:
2080                 rolloff = 115;
2081                 break;
2082         case SYS_DVBC_ANNEX_C:
2083                 rolloff = 113;
2084                 break;
2085         case SYS_DVBS:
2086         case SYS_TURBO:
2087         case SYS_ISDBS:
2088                 rolloff = 135;
2089                 break;
2090         case SYS_DVBS2:
2091                 switch (c->rolloff) {
2092                 case ROLLOFF_20:
2093                         rolloff = 120;
2094                         break;
2095                 case ROLLOFF_25:
2096                         rolloff = 125;
2097                         break;
2098                 default:
2099                 case ROLLOFF_35:
2100                         rolloff = 135;
2101                 }
2102                 break;
2103         default:
2104                 break;
2105         }
2106         if (rolloff)
2107                 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2108
2109         /* force auto frequency inversion if requested */
2110         if (dvb_force_auto_inversion)
2111                 c->inversion = INVERSION_AUTO;
2112
2113         /*
2114          * without hierarchical coding code_rate_LP is irrelevant,
2115          * so we tolerate the otherwise invalid FEC_NONE setting
2116          */
2117         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2118                 c->code_rate_LP = FEC_AUTO;
2119
2120         /* get frontend-specific tuning settings */
2121         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2122         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2123                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2124                 fepriv->max_drift = fetunesettings.max_drift;
2125                 fepriv->step_size = fetunesettings.step_size;
2126         } else {
2127                 /* default values */
2128                 switch (c->delivery_system) {
2129                 case SYS_DVBS:
2130                 case SYS_DVBS2:
2131                 case SYS_ISDBS:
2132                 case SYS_TURBO:
2133                 case SYS_DVBC_ANNEX_A:
2134                 case SYS_DVBC_ANNEX_C:
2135                         fepriv->min_delay = HZ / 20;
2136                         fepriv->step_size = c->symbol_rate / 16000;
2137                         fepriv->max_drift = c->symbol_rate / 2000;
2138                         break;
2139                 case SYS_DVBT:
2140                 case SYS_DVBT2:
2141                 case SYS_ISDBT:
2142                 case SYS_DTMB:
2143                         fepriv->min_delay = HZ / 20;
2144                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2145                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2146                         break;
2147                 default:
2148                         /*
2149                          * FIXME: This sounds wrong! if freqency_stepsize is
2150                          * defined by the frontend, why not use it???
2151                          */
2152                         fepriv->min_delay = HZ / 20;
2153                         fepriv->step_size = 0; /* no zigzag */
2154                         fepriv->max_drift = 0;
2155                         break;
2156                 }
2157         }
2158         if (dvb_override_tune_delay > 0)
2159                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2160
2161         fepriv->state = FESTATE_RETUNE;
2162
2163         /* Request the search algorithm to search */
2164         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2165
2166         dvb_frontend_clear_events(fe);
2167         dvb_frontend_add_event(fe, 0);
2168         dvb_frontend_wakeup(fe);
2169         fepriv->status = 0;
2170
2171         return 0;
2172 }
2173
2174
2175 static int dvb_frontend_ioctl_legacy(struct file *file,
2176                         unsigned int cmd, void *parg)
2177 {
2178         struct dvb_device *dvbdev = file->private_data;
2179         struct dvb_frontend *fe = dvbdev->priv;
2180         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2181         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2182         int err = -EOPNOTSUPP;
2183
2184         switch (cmd) {
2185         case FE_GET_INFO: {
2186                 struct dvb_frontend_info* info = parg;
2187
2188                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2189                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2190
2191                 /*
2192                  * Associate the 4 delivery systems supported by DVBv3
2193                  * API with their DVBv5 counterpart. For the other standards,
2194                  * use the closest type, assuming that it would hopefully
2195                  * work with a DVBv3 application.
2196                  * It should be noticed that, on multi-frontend devices with
2197                  * different types (terrestrial and cable, for example),
2198                  * a pure DVBv3 application won't be able to use all delivery
2199                  * systems. Yet, changing the DVBv5 cache to the other delivery
2200                  * system should be enough for making it work.
2201                  */
2202                 switch (dvbv3_type(c->delivery_system)) {
2203                 case DVBV3_QPSK:
2204                         info->type = FE_QPSK;
2205                         break;
2206                 case DVBV3_ATSC:
2207                         info->type = FE_ATSC;
2208                         break;
2209                 case DVBV3_QAM:
2210                         info->type = FE_QAM;
2211                         break;
2212                 case DVBV3_OFDM:
2213                         info->type = FE_OFDM;
2214                         break;
2215                 default:
2216                         dev_err(fe->dvb->device,
2217                                         "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2218                                         __func__, c->delivery_system);
2219                         fe->ops.info.type = FE_OFDM;
2220                 }
2221                 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2222                                  __func__, c->delivery_system, fe->ops.info.type);
2223
2224                 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2225                 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2226                         info->caps |= FE_CAN_INVERSION_AUTO;
2227                 err = 0;
2228                 break;
2229         }
2230
2231         case FE_READ_STATUS: {
2232                 enum fe_status *status = parg;
2233
2234                 /* if retune was requested but hasn't occurred yet, prevent
2235                  * that user get signal state from previous tuning */
2236                 if (fepriv->state == FESTATE_RETUNE ||
2237                     fepriv->state == FESTATE_ERROR) {
2238                         err=0;
2239                         *status = 0;
2240                         break;
2241                 }
2242
2243                 if (fe->ops.read_status)
2244                         err = fe->ops.read_status(fe, status);
2245                 break;
2246         }
2247
2248         case FE_READ_BER:
2249                 if (fe->ops.read_ber) {
2250                         if (fepriv->thread)
2251                                 err = fe->ops.read_ber(fe, (__u32 *) parg);
2252                         else
2253                                 err = -EAGAIN;
2254                 }
2255                 break;
2256
2257         case FE_READ_SIGNAL_STRENGTH:
2258                 if (fe->ops.read_signal_strength) {
2259                         if (fepriv->thread)
2260                                 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2261                         else
2262                                 err = -EAGAIN;
2263                 }
2264                 break;
2265
2266         case FE_READ_SNR:
2267                 if (fe->ops.read_snr) {
2268                         if (fepriv->thread)
2269                                 err = fe->ops.read_snr(fe, (__u16 *) parg);
2270                         else
2271                                 err = -EAGAIN;
2272                 }
2273                 break;
2274
2275         case FE_READ_UNCORRECTED_BLOCKS:
2276                 if (fe->ops.read_ucblocks) {
2277                         if (fepriv->thread)
2278                                 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2279                         else
2280                                 err = -EAGAIN;
2281                 }
2282                 break;
2283
2284         case FE_DISEQC_RESET_OVERLOAD:
2285                 if (fe->ops.diseqc_reset_overload) {
2286                         err = fe->ops.diseqc_reset_overload(fe);
2287                         fepriv->state = FESTATE_DISEQC;
2288                         fepriv->status = 0;
2289                 }
2290                 break;
2291
2292         case FE_DISEQC_SEND_MASTER_CMD:
2293                 if (fe->ops.diseqc_send_master_cmd) {
2294                         struct dvb_diseqc_master_cmd *cmd = parg;
2295
2296                         if (cmd->msg_len > sizeof(cmd->msg)) {
2297                                 err = -EINVAL;
2298                                 break;
2299                         }
2300                         err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2301                         fepriv->state = FESTATE_DISEQC;
2302                         fepriv->status = 0;
2303                 }
2304                 break;
2305
2306         case FE_DISEQC_SEND_BURST:
2307                 if (fe->ops.diseqc_send_burst) {
2308                         err = fe->ops.diseqc_send_burst(fe,
2309                                                 (enum fe_sec_mini_cmd)parg);
2310                         fepriv->state = FESTATE_DISEQC;
2311                         fepriv->status = 0;
2312                 }
2313                 break;
2314
2315         case FE_SET_TONE:
2316                 if (fe->ops.set_tone) {
2317                         err = fe->ops.set_tone(fe,
2318                                                (enum fe_sec_tone_mode)parg);
2319                         fepriv->tone = (enum fe_sec_tone_mode)parg;
2320                         fepriv->state = FESTATE_DISEQC;
2321                         fepriv->status = 0;
2322                 }
2323                 break;
2324
2325         case FE_SET_VOLTAGE:
2326                 if (fe->ops.set_voltage) {
2327                         err = fe->ops.set_voltage(fe,
2328                                                   (enum fe_sec_voltage)parg);
2329                         fepriv->voltage = (enum fe_sec_voltage)parg;
2330                         fepriv->state = FESTATE_DISEQC;
2331                         fepriv->status = 0;
2332                 }
2333                 break;
2334
2335         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2336                 if (fe->ops.dishnetwork_send_legacy_command) {
2337                         err = fe->ops.dishnetwork_send_legacy_command(fe,
2338                                                          (unsigned long)parg);
2339                         fepriv->state = FESTATE_DISEQC;
2340                         fepriv->status = 0;
2341                 } else if (fe->ops.set_voltage) {
2342                         /*
2343                          * NOTE: This is a fallback condition.  Some frontends
2344                          * (stv0299 for instance) take longer than 8msec to
2345                          * respond to a set_voltage command.  Those switches
2346                          * need custom routines to switch properly.  For all
2347                          * other frontends, the following should work ok.
2348                          * Dish network legacy switches (as used by Dish500)
2349                          * are controlled by sending 9-bit command words
2350                          * spaced 8msec apart.
2351                          * the actual command word is switch/port dependent
2352                          * so it is up to the userspace application to send
2353                          * the right command.
2354                          * The command must always start with a '0' after
2355                          * initialization, so parg is 8 bits and does not
2356                          * include the initialization or start bit
2357                          */
2358                         unsigned long swcmd = ((unsigned long) parg) << 1;
2359                         ktime_t nexttime;
2360                         ktime_t tv[10];
2361                         int i;
2362                         u8 last = 1;
2363                         if (dvb_frontend_debug)
2364                                 dprintk("%s switch command: 0x%04lx\n",
2365                                         __func__, swcmd);
2366                         nexttime = ktime_get_boottime();
2367                         if (dvb_frontend_debug)
2368                                 tv[0] = nexttime;
2369                         /* before sending a command, initialize by sending
2370                          * a 32ms 18V to the switch
2371                          */
2372                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2373                         dvb_frontend_sleep_until(&nexttime, 32000);
2374
2375                         for (i = 0; i < 9; i++) {
2376                                 if (dvb_frontend_debug)
2377                                         tv[i+1] = ktime_get_boottime();
2378                                 if ((swcmd & 0x01) != last) {
2379                                         /* set voltage to (last ? 13V : 18V) */
2380                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2381                                         last = (last) ? 0 : 1;
2382                                 }
2383                                 swcmd = swcmd >> 1;
2384                                 if (i != 8)
2385                                         dvb_frontend_sleep_until(&nexttime, 8000);
2386                         }
2387                         if (dvb_frontend_debug) {
2388                                 dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n",
2389                                         __func__, fe->dvb->num);
2390                                 for (i = 1; i < 10; i++)
2391                                         pr_info("%d: %d\n", i,
2392                                         (int) ktime_us_delta(tv[i], tv[i-1]));
2393                         }
2394                         err = 0;
2395                         fepriv->state = FESTATE_DISEQC;
2396                         fepriv->status = 0;
2397                 }
2398                 break;
2399
2400         case FE_DISEQC_RECV_SLAVE_REPLY:
2401                 if (fe->ops.diseqc_recv_slave_reply)
2402                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2403                 break;
2404
2405         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2406                 if (fe->ops.enable_high_lnb_voltage)
2407                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2408                 break;
2409
2410         case FE_SET_FRONTEND:
2411                 err = dvbv3_set_delivery_system(fe);
2412                 if (err)
2413                         break;
2414
2415                 err = dtv_property_cache_sync(fe, c, parg);
2416                 if (err)
2417                         break;
2418                 err = dtv_set_frontend(fe);
2419                 break;
2420         case FE_GET_EVENT:
2421                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2422                 break;
2423
2424         case FE_GET_FRONTEND: {
2425                 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2426
2427                 /*
2428                  * Let's use our own copy of property cache, in order to
2429                  * avoid mangling with DTV zigzag logic, as drivers might
2430                  * return crap, if they don't check if the data is available
2431                  * before updating the properties cache.
2432                  */
2433                 err = dtv_get_frontend(fe, &getp, parg);
2434                 break;
2435         }
2436         case FE_SET_FRONTEND_TUNE_MODE:
2437                 fepriv->tune_mode_flags = (unsigned long) parg;
2438                 err = 0;
2439                 break;
2440         }
2441
2442         return err;
2443 }
2444
2445
2446 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2447 {
2448         struct dvb_device *dvbdev = file->private_data;
2449         struct dvb_frontend *fe = dvbdev->priv;
2450         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2451
2452         dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2453
2454         poll_wait (file, &fepriv->events.wait_queue, wait);
2455
2456         if (fepriv->events.eventw != fepriv->events.eventr)
2457                 return (POLLIN | POLLRDNORM | POLLPRI);
2458
2459         return 0;
2460 }
2461
2462 static int dvb_frontend_open(struct inode *inode, struct file *file)
2463 {
2464         struct dvb_device *dvbdev = file->private_data;
2465         struct dvb_frontend *fe = dvbdev->priv;
2466         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2467         struct dvb_adapter *adapter = fe->dvb;
2468         int ret;
2469
2470         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2471         if (fe->exit == DVB_FE_DEVICE_REMOVED)
2472                 return -ENODEV;
2473
2474         if (adapter->mfe_shared) {
2475                 mutex_lock (&adapter->mfe_lock);
2476
2477                 if (adapter->mfe_dvbdev == NULL)
2478                         adapter->mfe_dvbdev = dvbdev;
2479
2480                 else if (adapter->mfe_dvbdev != dvbdev) {
2481                         struct dvb_device
2482                                 *mfedev = adapter->mfe_dvbdev;
2483                         struct dvb_frontend
2484                                 *mfe = mfedev->priv;
2485                         struct dvb_frontend_private
2486                                 *mfepriv = mfe->frontend_priv;
2487                         int mferetry = (dvb_mfe_wait_time << 1);
2488
2489                         mutex_unlock (&adapter->mfe_lock);
2490                         while (mferetry-- && (mfedev->users != -1 ||
2491                                         mfepriv->thread != NULL)) {
2492                                 if(msleep_interruptible(500)) {
2493                                         if(signal_pending(current))
2494                                                 return -EINTR;
2495                                 }
2496                         }
2497
2498                         mutex_lock (&adapter->mfe_lock);
2499                         if(adapter->mfe_dvbdev != dvbdev) {
2500                                 mfedev = adapter->mfe_dvbdev;
2501                                 mfe = mfedev->priv;
2502                                 mfepriv = mfe->frontend_priv;
2503                                 if (mfedev->users != -1 ||
2504                                                 mfepriv->thread != NULL) {
2505                                         mutex_unlock (&adapter->mfe_lock);
2506                                         return -EBUSY;
2507                                 }
2508                                 adapter->mfe_dvbdev = dvbdev;
2509                         }
2510                 }
2511         }
2512
2513         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2514                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2515                         goto err0;
2516
2517                 /* If we took control of the bus, we need to force
2518                    reinitialization.  This is because many ts_bus_ctrl()
2519                    functions strobe the RESET pin on the demod, and if the
2520                    frontend thread already exists then the dvb_init() routine
2521                    won't get called (which is what usually does initial
2522                    register configuration). */
2523                 fepriv->reinitialise = 1;
2524         }
2525
2526         if ((ret = dvb_generic_open (inode, file)) < 0)
2527                 goto err1;
2528
2529         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2530                 /* normal tune mode when opened R/W */
2531                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2532                 fepriv->tone = -1;
2533                 fepriv->voltage = -1;
2534
2535 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2536                 if (fe->dvb->mdev) {
2537                         mutex_lock(&fe->dvb->mdev->graph_mutex);
2538                         if (fe->dvb->mdev->enable_source)
2539                                 ret = fe->dvb->mdev->enable_source(
2540                                                            dvbdev->entity,
2541                                                            &fepriv->pipe);
2542                         mutex_unlock(&fe->dvb->mdev->graph_mutex);
2543                         if (ret) {
2544                                 dev_err(fe->dvb->device,
2545                                         "Tuner is busy. Error %d\n", ret);
2546                                 goto err2;
2547                         }
2548                 }
2549 #endif
2550                 ret = dvb_frontend_start (fe);
2551                 if (ret)
2552                         goto err3;
2553
2554                 /*  empty event queue */
2555                 fepriv->events.eventr = fepriv->events.eventw = 0;
2556         }
2557
2558         dvb_frontend_get(fe);
2559
2560         if (adapter->mfe_shared)
2561                 mutex_unlock (&adapter->mfe_lock);
2562         return ret;
2563
2564 err3:
2565 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2566         if (fe->dvb->mdev) {
2567                 mutex_lock(&fe->dvb->mdev->graph_mutex);
2568                 if (fe->dvb->mdev->disable_source)
2569                         fe->dvb->mdev->disable_source(dvbdev->entity);
2570                 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2571         }
2572 err2:
2573 #endif
2574         dvb_generic_release(inode, file);
2575 err1:
2576         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2577                 fe->ops.ts_bus_ctrl(fe, 0);
2578 err0:
2579         if (adapter->mfe_shared)
2580                 mutex_unlock (&adapter->mfe_lock);
2581         return ret;
2582 }
2583
2584 static int dvb_frontend_release(struct inode *inode, struct file *file)
2585 {
2586         struct dvb_device *dvbdev = file->private_data;
2587         struct dvb_frontend *fe = dvbdev->priv;
2588         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2589         int ret;
2590
2591         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2592
2593         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2594                 fepriv->release_jiffies = jiffies;
2595                 mb();
2596         }
2597
2598         ret = dvb_generic_release (inode, file);
2599
2600         if (dvbdev->users == -1) {
2601                 wake_up(&fepriv->wait_queue);
2602 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2603                 if (fe->dvb->mdev) {
2604                         mutex_lock(&fe->dvb->mdev->graph_mutex);
2605                         if (fe->dvb->mdev->disable_source)
2606                                 fe->dvb->mdev->disable_source(dvbdev->entity);
2607                         mutex_unlock(&fe->dvb->mdev->graph_mutex);
2608                 }
2609 #endif
2610                 if (fe->exit != DVB_FE_NO_EXIT)
2611                         wake_up(&dvbdev->wait_queue);
2612                 if (fe->ops.ts_bus_ctrl)
2613                         fe->ops.ts_bus_ctrl(fe, 0);
2614         }
2615
2616         dvb_frontend_put(fe);
2617
2618         return ret;
2619 }
2620
2621 static const struct file_operations dvb_frontend_fops = {
2622         .owner          = THIS_MODULE,
2623         .unlocked_ioctl = dvb_generic_ioctl,
2624         .poll           = dvb_frontend_poll,
2625         .open           = dvb_frontend_open,
2626         .release        = dvb_frontend_release,
2627         .llseek         = noop_llseek,
2628 };
2629
2630 int dvb_frontend_suspend(struct dvb_frontend *fe)
2631 {
2632         int ret = 0;
2633
2634         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2635                         fe->id);
2636
2637         if (fe->ops.tuner_ops.suspend)
2638                 ret = fe->ops.tuner_ops.suspend(fe);
2639         else if (fe->ops.tuner_ops.sleep)
2640                 ret = fe->ops.tuner_ops.sleep(fe);
2641
2642         if (fe->ops.sleep)
2643                 ret = fe->ops.sleep(fe);
2644
2645         return ret;
2646 }
2647 EXPORT_SYMBOL(dvb_frontend_suspend);
2648
2649 int dvb_frontend_resume(struct dvb_frontend *fe)
2650 {
2651         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2652         int ret = 0;
2653
2654         dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2655                         fe->id);
2656
2657         fe->exit = DVB_FE_DEVICE_RESUME;
2658         if (fe->ops.init)
2659                 ret = fe->ops.init(fe);
2660
2661         if (fe->ops.tuner_ops.resume)
2662                 ret = fe->ops.tuner_ops.resume(fe);
2663         else if (fe->ops.tuner_ops.init)
2664                 ret = fe->ops.tuner_ops.init(fe);
2665
2666         if (fe->ops.set_tone && fepriv->tone != -1)
2667                 fe->ops.set_tone(fe, fepriv->tone);
2668         if (fe->ops.set_voltage && fepriv->voltage != -1)
2669                 fe->ops.set_voltage(fe, fepriv->voltage);
2670
2671         fe->exit = DVB_FE_NO_EXIT;
2672         fepriv->state = FESTATE_RETUNE;
2673         dvb_frontend_wakeup(fe);
2674
2675         return ret;
2676 }
2677 EXPORT_SYMBOL(dvb_frontend_resume);
2678
2679 int dvb_register_frontend(struct dvb_adapter* dvb,
2680                           struct dvb_frontend* fe)
2681 {
2682         struct dvb_frontend_private *fepriv;
2683         const struct dvb_device dvbdev_template = {
2684                 .users = ~0,
2685                 .writers = 1,
2686                 .readers = (~0)-1,
2687                 .fops = &dvb_frontend_fops,
2688 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2689                 .name = fe->ops.info.name,
2690 #endif
2691                 .kernel_ioctl = dvb_frontend_ioctl
2692         };
2693
2694         dev_dbg(dvb->device, "%s:\n", __func__);
2695
2696         if (mutex_lock_interruptible(&frontend_mutex))
2697                 return -ERESTARTSYS;
2698
2699         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2700         if (fe->frontend_priv == NULL) {
2701                 mutex_unlock(&frontend_mutex);
2702                 return -ENOMEM;
2703         }
2704         fepriv = fe->frontend_priv;
2705
2706         kref_init(&fe->refcount);
2707
2708         /*
2709          * After initialization, there need to be two references: one
2710          * for dvb_unregister_frontend(), and another one for
2711          * dvb_frontend_detach().
2712          */
2713         dvb_frontend_get(fe);
2714
2715         sema_init(&fepriv->sem, 1);
2716         init_waitqueue_head (&fepriv->wait_queue);
2717         init_waitqueue_head (&fepriv->events.wait_queue);
2718         mutex_init(&fepriv->events.mtx);
2719         fe->dvb = dvb;
2720         fepriv->inversion = INVERSION_OFF;
2721
2722         dev_info(fe->dvb->device,
2723                         "DVB: registering adapter %i frontend %i (%s)...\n",
2724                         fe->dvb->num, fe->id, fe->ops.info.name);
2725
2726         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2727                              fe, DVB_DEVICE_FRONTEND, 0);
2728
2729         /*
2730          * Initialize the cache to the proper values according with the
2731          * first supported delivery system (ops->delsys[0])
2732          */
2733
2734         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2735         dvb_frontend_clear_cache(fe);
2736
2737         mutex_unlock(&frontend_mutex);
2738         return 0;
2739 }
2740 EXPORT_SYMBOL(dvb_register_frontend);
2741
2742 int dvb_unregister_frontend(struct dvb_frontend* fe)
2743 {
2744         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2745         dev_dbg(fe->dvb->device, "%s:\n", __func__);
2746
2747         mutex_lock(&frontend_mutex);
2748         dvb_frontend_stop(fe);
2749         dvb_remove_device(fepriv->dvbdev);
2750
2751         /* fe is invalid now */
2752         mutex_unlock(&frontend_mutex);
2753         dvb_frontend_put(fe);
2754         return 0;
2755 }
2756 EXPORT_SYMBOL(dvb_unregister_frontend);
2757
2758 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
2759                                         void (*release)(struct dvb_frontend *fe))
2760 {
2761         if (release) {
2762                 release(fe);
2763 #ifdef CONFIG_MEDIA_ATTACH
2764                 dvb_detach(release);
2765 #endif
2766         }
2767 }
2768
2769 void dvb_frontend_detach(struct dvb_frontend* fe)
2770 {
2771         dvb_frontend_invoke_release(fe, fe->ops.release_sec);
2772         dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
2773         dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
2774         dvb_frontend_invoke_release(fe, fe->ops.detach);
2775         dvb_frontend_put(fe);
2776 }
2777 EXPORT_SYMBOL(dvb_frontend_detach);