drivers/media/dvb/dvb-core/dvb_frontend.c

   1 /*
   2  * dvb_frontend.c: DVB frontend tuning interface/thread
   3  *
   4  *
   5  * Copyright (C) 1999-2001 Ralph  Metzler
   6  *                         Marcus Metzler
   7  *                         Holger Waechtler
   8  *                                    for convergence integrated media GmbH
   9  *
  10  * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26  */
  27
  28 /* Enables DVBv3 compatibility bits at the headers */
  29 #define __DVB_CORE__
  30
  31 #include <linux/string.h>
  32 #include <linux/kernel.h>
  33 #include <linux/sched.h>
  34 #include <linux/wait.h>
  35 #include <linux/slab.h>
  36 #include <linux/poll.h>
  37 #include <linux/semaphore.h>
  38 #include <linux/module.h>
  39 #include <linux/list.h>
  40 #include <linux/freezer.h>
  41 #include <linux/jiffies.h>
  42 #include <linux/kthread.h>
  43 #include <asm/processor.h>
  44
  45 #include "dvb_frontend.h"
  46 #include "dvbdev.h"
  47 #include <linux/dvb/version.h>
  48
  49 static int dvb_frontend_debug;
  50 static int dvb_shutdown_timeout;
  51 static int dvb_force_auto_inversion;
  52 static int dvb_override_tune_delay;
  53 static int dvb_powerdown_on_sleep = 1;
  54 static int dvb_mfe_wait_time = 5;
  55
  56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  58 module_param(dvb_shutdown_timeout, int, 0644);
  59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  60 module_param(dvb_force_auto_inversion, int, 0644);
  61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  62 module_param(dvb_override_tune_delay, int, 0644);
  63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  64 module_param(dvb_powerdown_on_sleep, int, 0644);
  65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  66 module_param(dvb_mfe_wait_time, int, 0644);
  67 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
  68
  69 #define dprintk if (dvb_frontend_debug) printk
  70
  71 #define FESTATE_IDLE 1
  72 #define FESTATE_RETUNE 2
  73 #define FESTATE_TUNING_FAST 4
  74 #define FESTATE_TUNING_SLOW 8
  75 #define FESTATE_TUNED 16
  76 #define FESTATE_ZIGZAG_FAST 32
  77 #define FESTATE_ZIGZAG_SLOW 64
  78 #define FESTATE_DISEQC 128
  79 #define FESTATE_ERROR 256
  80 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  81 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  82 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  83 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  84
  85 #define FE_ALGO_HW              1
  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 #define DVB_FE_NO_EXIT  0
 102 #define DVB_FE_NORMAL_EXIT      1
 103 #define DVB_FE_DEVICE_REMOVED   2
 104
 105 static DEFINE_MUTEX(frontend_mutex);
 106
 107 struct dvb_frontend_private {
 108
 109         /* thread/frontend values */
 110         struct dvb_device *dvbdev;
 111         struct dvb_frontend_parameters parameters_out;
 112         struct dvb_fe_events events;
 113         struct semaphore sem;
 114         struct list_head list_head;
 115         wait_queue_head_t wait_queue;
 116         struct task_struct *thread;
 117         unsigned long release_jiffies;
 118         unsigned int exit;
 119         unsigned int wakeup;
 120         fe_status_t status;
 121         unsigned long tune_mode_flags;
 122         unsigned int delay;
 123         unsigned int reinitialise;
 124         int tone;
 125         int voltage;
 126
 127         /* swzigzag values */
 128         unsigned int state;
 129         unsigned int bending;
 130         int lnb_drift;
 131         unsigned int inversion;
 132         unsigned int auto_step;
 133         unsigned int auto_sub_step;
 134         unsigned int started_auto_step;
 135         unsigned int min_delay;
 136         unsigned int max_drift;
 137         unsigned int step_size;
 138         int quality;
 139         unsigned int check_wrapped;
 140         enum dvbfe_search algo_status;
 141 };
 142
 143 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 144 static int dtv_get_frontend(struct dvb_frontend *fe,
 145                             struct dvb_frontend_parameters *p_out);
 146 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
 147                                            struct dvb_frontend_parameters *p);
 148
 149 static bool has_get_frontend(struct dvb_frontend *fe)
 150 {
 151         return fe->ops.get_frontend != NULL;
 152 }
 153
 154 /*
 155  * Due to DVBv3 API calls, a delivery system should be mapped into one of
 156  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
 157  * otherwise, a DVBv3 call will fail.
 158  */
 159 enum dvbv3_emulation_type {
 160         DVBV3_UNKNOWN,
 161         DVBV3_QPSK,
 162         DVBV3_QAM,
 163         DVBV3_OFDM,
 164         DVBV3_ATSC,
 165 };
 166
 167 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
 168 {
 169         switch (delivery_system) {
 170         case SYS_DVBC_ANNEX_A:
 171         case SYS_DVBC_ANNEX_C:
 172                 return DVBV3_QAM;
 173         case SYS_DVBS:
 174         case SYS_DVBS2:
 175         case SYS_TURBO:
 176         case SYS_ISDBS:
 177         case SYS_DSS:
 178                 return DVBV3_QPSK;
 179         case SYS_DVBT:
 180         case SYS_DVBT2:
 181         case SYS_ISDBT:
 182         case SYS_DMBTH:
 183                 return DVBV3_OFDM;
 184         case SYS_ATSC:
 185         case SYS_DVBC_ANNEX_B:
 186                 return DVBV3_ATSC;
 187         case SYS_UNDEFINED:
 188         case SYS_ISDBC:
 189         case SYS_DVBH:
 190         case SYS_DAB:
 191         case SYS_ATSCMH:
 192         default:
 193                 /*
 194                  * Doesn't know how to emulate those types and/or
 195                  * there's no frontend driver from this type yet
 196                  * with some emulation code, so, we're not sure yet how
 197                  * to handle them, or they're not compatible with a DVBv3 call.
 198                  */
 199                 return DVBV3_UNKNOWN;
 200         }
 201 }
 202
 203 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 204 {
 205         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 206         struct dvb_fe_events *events = &fepriv->events;
 207         struct dvb_frontend_event *e;
 208         int wp;
 209
 210         dprintk ("%s\n", __func__);
 211
 212         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
 213                 dtv_get_frontend(fe, &fepriv->parameters_out);
 214
 215         mutex_lock(&events->mtx);
 216
 217         wp = (events->eventw + 1) % MAX_EVENT;
 218         if (wp == events->eventr) {
 219                 events->overflow = 1;
 220                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 221         }
 222
 223         e = &events->events[events->eventw];
 224         e->status = status;
 225         e->parameters = fepriv->parameters_out;
 226
 227         events->eventw = wp;
 228
 229         mutex_unlock(&events->mtx);
 230
 231         wake_up_interruptible (&events->wait_queue);
 232 }
 233
 234 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 235                             struct dvb_frontend_event *event, int flags)
 236 {
 237         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 238         struct dvb_fe_events *events = &fepriv->events;
 239
 240         dprintk ("%s\n", __func__);
 241
 242         if (events->overflow) {
 243                 events->overflow = 0;
 244                 return -EOVERFLOW;
 245         }
 246
 247         if (events->eventw == events->eventr) {
 248                 int ret;
 249
 250                 if (flags & O_NONBLOCK)
 251                         return -EWOULDBLOCK;
 252
 253                 up(&fepriv->sem);
 254
 255                 ret = wait_event_interruptible (events->wait_queue,
 256                                                 events->eventw != events->eventr);
 257
 258                 if (down_interruptible (&fepriv->sem))
 259                         return -ERESTARTSYS;
 260
 261                 if (ret < 0)
 262                         return ret;
 263         }
 264
 265         mutex_lock(&events->mtx);
 266         *event = events->events[events->eventr];
 267         events->eventr = (events->eventr + 1) % MAX_EVENT;
 268         mutex_unlock(&events->mtx);
 269
 270         return 0;
 271 }
 272
 273 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 274 {
 275         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 276         struct dvb_fe_events *events = &fepriv->events;
 277
 278         mutex_lock(&events->mtx);
 279         events->eventr = events->eventw;
 280         mutex_unlock(&events->mtx);
 281 }
 282
 283 static void dvb_frontend_init(struct dvb_frontend *fe)
 284 {
 285         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 286                  fe->dvb->num,
 287                  fe->id,
 288                  fe->ops.info.name);
 289
 290         if (fe->ops.init)
 291                 fe->ops.init(fe);
 292         if (fe->ops.tuner_ops.init) {
 293                 if (fe->ops.i2c_gate_ctrl)
 294                         fe->ops.i2c_gate_ctrl(fe, 1);
 295                 fe->ops.tuner_ops.init(fe);
 296                 if (fe->ops.i2c_gate_ctrl)
 297                         fe->ops.i2c_gate_ctrl(fe, 0);
 298         }
 299 }
 300
 301 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 302 {
 303         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 304
 305         fepriv->reinitialise = 1;
 306         dvb_frontend_wakeup(fe);
 307 }
 308 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 309
 310 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 311 {
 312         int q2;
 313
 314         dprintk ("%s\n", __func__);
 315
 316         if (locked)
 317                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 318         else
 319                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 320
 321         q2 = fepriv->quality - 128;
 322         q2 *= q2;
 323
 324         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 325 }
 326
 327 /**
 328  * Performs automatic twiddling of frontend parameters.
 329  *
 330  * @param fe The frontend concerned.
 331  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 332  * @returns Number of complete iterations that have been performed.
 333  */
 334 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 335 {
 336         int autoinversion;
 337         int ready = 0;
 338         int fe_set_err = 0;
 339         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 340         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 341         int original_inversion = c->inversion;
 342         u32 original_frequency = c->frequency;
 343
 344         /* are we using autoinversion? */
 345         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 346                          (c->inversion == INVERSION_AUTO));
 347
 348         /* setup parameters correctly */
 349         while(!ready) {
 350                 /* calculate the lnb_drift */
 351                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 352
 353                 /* wrap the auto_step if we've exceeded the maximum drift */
 354                 if (fepriv->lnb_drift > fepriv->max_drift) {
 355                         fepriv->auto_step = 0;
 356                         fepriv->auto_sub_step = 0;
 357                         fepriv->lnb_drift = 0;
 358                 }
 359
 360                 /* perform inversion and +/- zigzag */
 361                 switch(fepriv->auto_sub_step) {
 362                 case 0:
 363                         /* try with the current inversion and current drift setting */
 364                         ready = 1;
 365                         break;
 366
 367                 case 1:
 368                         if (!autoinversion) break;
 369
 370                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 371                         ready = 1;
 372                         break;
 373
 374                 case 2:
 375                         if (fepriv->lnb_drift == 0) break;
 376
 377                         fepriv->lnb_drift = -fepriv->lnb_drift;
 378                         ready = 1;
 379                         break;
 380
 381                 case 3:
 382                         if (fepriv->lnb_drift == 0) break;
 383                         if (!autoinversion) break;
 384
 385                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 386                         fepriv->lnb_drift = -fepriv->lnb_drift;
 387                         ready = 1;
 388                         break;
 389
 390                 default:
 391                         fepriv->auto_step++;
 392                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 393                         break;
 394                 }
 395
 396                 if (!ready) fepriv->auto_sub_step++;
 397         }
 398
 399         /* if this attempt would hit where we started, indicate a complete
 400          * iteration has occurred */
 401         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 402             (fepriv->auto_sub_step == 0) && check_wrapped) {
 403                 return 1;
 404         }
 405
 406         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 407                 "auto_sub_step:%i started_auto_step:%i\n",
 408                 __func__, fepriv->lnb_drift, fepriv->inversion,
 409                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 410
 411         /* set the frontend itself */
 412         c->frequency += fepriv->lnb_drift;
 413         if (autoinversion)
 414                 c->inversion = fepriv->inversion;
 415         tmp = *c;
 416         if (fe->ops.set_frontend)
 417                 fe_set_err = fe->ops.set_frontend(fe);
 418         *c = tmp;
 419         if (fe_set_err < 0) {
 420                 fepriv->state = FESTATE_ERROR;
 421                 return fe_set_err;
 422         }
 423
 424         c->frequency = original_frequency;
 425         c->inversion = original_inversion;
 426
 427         fepriv->auto_sub_step++;
 428         return 0;
 429 }
 430
 431 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 432 {
 433         fe_status_t s = 0;
 434         int retval = 0;
 435         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 436         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
 437
 438         /* if we've got no parameters, just keep idling */
 439         if (fepriv->state & FESTATE_IDLE) {
 440                 fepriv->delay = 3*HZ;
 441                 fepriv->quality = 0;
 442                 return;
 443         }
 444
 445         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 446         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 447                 if (fepriv->state & FESTATE_RETUNE) {
 448                         tmp = *c;
 449                         if (fe->ops.set_frontend)
 450                                 retval = fe->ops.set_frontend(fe);
 451                         *c = tmp;
 452                         if (retval < 0)
 453                                 fepriv->state = FESTATE_ERROR;
 454                         else
 455                                 fepriv->state = FESTATE_TUNED;
 456                 }
 457                 fepriv->delay = 3*HZ;
 458                 fepriv->quality = 0;
 459                 return;
 460         }
 461
 462         /* get the frontend status */
 463         if (fepriv->state & FESTATE_RETUNE) {
 464                 s = 0;
 465         } else {
 466                 if (fe->ops.read_status)
 467                         fe->ops.read_status(fe, &s);
 468                 if (s != fepriv->status) {
 469                         dvb_frontend_add_event(fe, s);
 470                         fepriv->status = s;
 471                 }
 472         }
 473
 474         /* if we're not tuned, and we have a lock, move to the TUNED state */
 475         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 476                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 477                 fepriv->state = FESTATE_TUNED;
 478
 479                 /* if we're tuned, then we have determined the correct inversion */
 480                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 481                     (c->inversion == INVERSION_AUTO)) {
 482                         c->inversion = fepriv->inversion;
 483                 }
 484                 return;
 485         }
 486
 487         /* if we are tuned already, check we're still locked */
 488         if (fepriv->state & FESTATE_TUNED) {
 489                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 490
 491                 /* we're tuned, and the lock is still good... */
 492                 if (s & FE_HAS_LOCK) {
 493                         return;
 494                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 495                         fepriv->state = FESTATE_ZIGZAG_FAST;
 496                         fepriv->started_auto_step = fepriv->auto_step;
 497                         fepriv->check_wrapped = 0;
 498                 }
 499         }
 500
 501         /* don't actually do anything if we're in the LOSTLOCK state,
 502          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 503         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 504             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 505                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 506                 return;
 507         }
 508
 509         /* don't do anything if we're in the DISEQC state, since this
 510          * might be someone with a motorized dish controlled by DISEQC.
 511          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 512         if (fepriv->state & FESTATE_DISEQC) {
 513                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 514                 return;
 515         }
 516
 517         /* if we're in the RETUNE state, set everything up for a brand
 518          * new scan, keeping the current inversion setting, as the next
 519          * tune is _very_ likely to require the same */
 520         if (fepriv->state & FESTATE_RETUNE) {
 521                 fepriv->lnb_drift = 0;
 522                 fepriv->auto_step = 0;
 523                 fepriv->auto_sub_step = 0;
 524                 fepriv->started_auto_step = 0;
 525                 fepriv->check_wrapped = 0;
 526         }
 527
 528         /* fast zigzag. */
 529         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 530                 fepriv->delay = fepriv->min_delay;
 531
 532                 /* perform a tune */
 533                 retval = dvb_frontend_swzigzag_autotune(fe,
 534                                                         fepriv->check_wrapped);
 535                 if (retval < 0) {
 536                         return;
 537                 } else if (retval) {
 538                         /* OK, if we've run out of trials at the fast speed.
 539                          * Drop back to slow for the _next_ attempt */
 540                         fepriv->state = FESTATE_SEARCHING_SLOW;
 541                         fepriv->started_auto_step = fepriv->auto_step;
 542                         return;
 543                 }
 544                 fepriv->check_wrapped = 1;
 545
 546                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 547                  * This ensures we cannot return from an
 548                  * FE_SET_FRONTEND ioctl before the first frontend tune
 549                  * occurs */
 550                 if (fepriv->state & FESTATE_RETUNE) {
 551                         fepriv->state = FESTATE_TUNING_FAST;
 552                 }
 553         }
 554
 555         /* slow zigzag */
 556         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 557                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 558
 559                 /* Note: don't bother checking for wrapping; we stay in this
 560                  * state until we get a lock */
 561                 dvb_frontend_swzigzag_autotune(fe, 0);
 562         }
 563 }
 564
 565 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 566 {
 567         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 568
 569         if (fepriv->exit != DVB_FE_NO_EXIT)
 570                 return 1;
 571
 572         if (fepriv->dvbdev->writers == 1)
 573                 if (time_after_eq(jiffies, fepriv->release_jiffies +
 574                                   dvb_shutdown_timeout * HZ))
 575                         return 1;
 576
 577         return 0;
 578 }
 579
 580 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 581 {
 582         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 583
 584         if (fepriv->wakeup) {
 585                 fepriv->wakeup = 0;
 586                 return 1;
 587         }
 588         return dvb_frontend_is_exiting(fe);
 589 }
 590
 591 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 592 {
 593         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 594
 595         fepriv->wakeup = 1;
 596         wake_up_interruptible(&fepriv->wait_queue);
 597 }
 598
 599 static int dvb_frontend_thread(void *data)
 600 {
 601         struct dvb_frontend *fe = data;
 602         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 603         fe_status_t s;
 604         enum dvbfe_algo algo;
 605
 606         bool re_tune = false;
 607
 608         dprintk("%s\n", __func__);
 609
 610         fepriv->check_wrapped = 0;
 611         fepriv->quality = 0;
 612         fepriv->delay = 3*HZ;
 613         fepriv->status = 0;
 614         fepriv->wakeup = 0;
 615         fepriv->reinitialise = 0;
 616
 617         dvb_frontend_init(fe);
 618
 619         set_freezable();
 620         while (1) {
 621                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 622 restart:
 623                 wait_event_interruptible_timeout(fepriv->wait_queue,
 624                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 625                                 || freezing(current),
 626                         fepriv->delay);
 627
 628                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 629                         /* got signal or quitting */
 630                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 631                         break;
 632                 }
 633
 634                 if (try_to_freeze())
 635                         goto restart;
 636
 637                 if (down_interruptible(&fepriv->sem))
 638                         break;
 639
 640                 if (fepriv->reinitialise) {
 641                         dvb_frontend_init(fe);
 642                         if (fe->ops.set_tone && fepriv->tone != -1)
 643                                 fe->ops.set_tone(fe, fepriv->tone);
 644                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 645                                 fe->ops.set_voltage(fe, fepriv->voltage);
 646                         fepriv->reinitialise = 0;
 647                 }
 648
 649                 /* do an iteration of the tuning loop */
 650                 if (fe->ops.get_frontend_algo) {
 651                         algo = fe->ops.get_frontend_algo(fe);
 652                         switch (algo) {
 653                         case DVBFE_ALGO_HW:
 654                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 655
 656                                 if (fepriv->state & FESTATE_RETUNE) {
 657                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 658                                         re_tune = true;
 659                                         fepriv->state = FESTATE_TUNED;
 660                                 } else {
 661                                         re_tune = false;
 662                                 }
 663
 664                                 if (fe->ops.tune)
 665                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
 666
 667                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 668                                         dprintk("%s: state changed, adding current state\n", __func__);
 669                                         dvb_frontend_add_event(fe, s);
 670                                         fepriv->status = s;
 671                                 }
 672                                 break;
 673                         case DVBFE_ALGO_SW:
 674                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 675                                 dvb_frontend_swzigzag(fe);
 676                                 break;
 677                         case DVBFE_ALGO_CUSTOM:
 678                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 679                                 if (fepriv->state & FESTATE_RETUNE) {
 680                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 681                                         fepriv->state = FESTATE_TUNED;
 682                                 }
 683                                 /* Case where we are going to search for a carrier
 684                                  * User asked us to retune again for some reason, possibly
 685                                  * requesting a search with a new set of parameters
 686                                  */
 687                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 688                                         if (fe->ops.search) {
 689                                                 fepriv->algo_status = fe->ops.search(fe);
 690                                                 /* We did do a search as was requested, the flags are
 691                                                  * now unset as well and has the flags wrt to search.
 692                                                  */
 693                                         } else {
 694                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 695                                         }
 696                                 }
 697                                 /* Track the carrier if the search was successful */
 698                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
 699                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 700                                         fepriv->delay = HZ / 2;
 701                                 }
 702                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
 703                                 fe->ops.read_status(fe, &s);
 704                                 if (s != fepriv->status) {
 705                                         dvb_frontend_add_event(fe, s); /* update event list */
 706                                         fepriv->status = s;
 707                                         if (!(s & FE_HAS_LOCK)) {
 708                                                 fepriv->delay = HZ / 10;
 709                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 710                                         } else {
 711                                                 fepriv->delay = 60 * HZ;
 712                                         }
 713                                 }
 714                                 break;
 715                         default:
 716                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 717                                 break;
 718                         }
 719                 } else {
 720                         dvb_frontend_swzigzag(fe);
 721                 }
 722         }
 723
 724         if (dvb_powerdown_on_sleep) {
 725                 if (fe->ops.set_voltage)
 726                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 727                 if (fe->ops.tuner_ops.sleep) {
 728                         if (fe->ops.i2c_gate_ctrl)
 729                                 fe->ops.i2c_gate_ctrl(fe, 1);
 730                         fe->ops.tuner_ops.sleep(fe);
 731                         if (fe->ops.i2c_gate_ctrl)
 732                                 fe->ops.i2c_gate_ctrl(fe, 0);
 733                 }
 734                 if (fe->ops.sleep)
 735                         fe->ops.sleep(fe);
 736         }
 737
 738         fepriv->thread = NULL;
 739         if (kthread_should_stop())
 740                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 741         else
 742                 fepriv->exit = DVB_FE_NO_EXIT;
 743         mb();
 744
 745         dvb_frontend_wakeup(fe);
 746         return 0;
 747 }
 748
 749 static void dvb_frontend_stop(struct dvb_frontend *fe)
 750 {
 751         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 752
 753         dprintk ("%s\n", __func__);
 754
 755         fepriv->exit = DVB_FE_NORMAL_EXIT;
 756         mb();
 757
 758         if (!fepriv->thread)
 759                 return;
 760
 761         kthread_stop(fepriv->thread);
 762
 763         sema_init(&fepriv->sem, 1);
 764         fepriv->state = FESTATE_IDLE;
 765
 766         /* paranoia check in case a signal arrived */
 767         if (fepriv->thread)
 768                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 769                                 fepriv->thread);
 770 }
 771
 772 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 773 {
 774         return ((curtime.tv_usec < lasttime.tv_usec) ?
 775                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 776                 curtime.tv_usec - lasttime.tv_usec);
 777 }
 778 EXPORT_SYMBOL(timeval_usec_diff);
 779
 780 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 781 {
 782         curtime->tv_usec += add_usec;
 783         if (curtime->tv_usec >= 1000000) {
 784                 curtime->tv_usec -= 1000000;
 785                 curtime->tv_sec++;
 786         }
 787 }
 788
 789 /*
 790  * Sleep until gettimeofday() > waketime + add_usec
 791  * This needs to be as precise as possible, but as the delay is
 792  * usually between 2ms and 32ms, it is done using a scheduled msleep
 793  * followed by usleep (normally a busy-wait loop) for the remainder
 794  */
 795 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 796 {
 797         struct timeval lasttime;
 798         s32 delta, newdelta;
 799
 800         timeval_usec_add(waketime, add_usec);
 801
 802         do_gettimeofday(&lasttime);
 803         delta = timeval_usec_diff(lasttime, *waketime);
 804         if (delta > 2500) {
 805                 msleep((delta - 1500) / 1000);
 806                 do_gettimeofday(&lasttime);
 807                 newdelta = timeval_usec_diff(lasttime, *waketime);
 808                 delta = (newdelta > delta) ? 0 : newdelta;
 809         }
 810         if (delta > 0)
 811                 udelay(delta);
 812 }
 813 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 814
 815 static int dvb_frontend_start(struct dvb_frontend *fe)
 816 {
 817         int ret;
 818         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 819         struct task_struct *fe_thread;
 820
 821         dprintk ("%s\n", __func__);
 822
 823         if (fepriv->thread) {
 824                 if (fepriv->exit == DVB_FE_NO_EXIT)
 825                         return 0;
 826                 else
 827                         dvb_frontend_stop (fe);
 828         }
 829
 830         if (signal_pending(current))
 831                 return -EINTR;
 832         if (down_interruptible (&fepriv->sem))
 833                 return -EINTR;
 834
 835         fepriv->state = FESTATE_IDLE;
 836         fepriv->exit = DVB_FE_NO_EXIT;
 837         fepriv->thread = NULL;
 838         mb();
 839
 840         fe_thread = kthread_run(dvb_frontend_thread, fe,
 841                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 842         if (IS_ERR(fe_thread)) {
 843                 ret = PTR_ERR(fe_thread);
 844                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 845                 up(&fepriv->sem);
 846                 return ret;
 847         }
 848         fepriv->thread = fe_thread;
 849         return 0;
 850 }
 851
 852 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 853                                         u32 *freq_min, u32 *freq_max)
 854 {
 855         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 856
 857         if (fe->ops.info.frequency_max == 0)
 858                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 859         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 860                 *freq_max = fe->ops.info.frequency_max;
 861         else
 862                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 863
 864         if (*freq_min == 0 || *freq_max == 0)
 865                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 866                        fe->dvb->num,fe->id);
 867 }
 868
 869 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
 870 {
 871         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 872         u32 freq_min;
 873         u32 freq_max;
 874
 875         /* range check: frequency */
 876         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 877         if ((freq_min && c->frequency < freq_min) ||
 878             (freq_max && c->frequency > freq_max)) {
 879                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 880                        fe->dvb->num, fe->id, c->frequency, freq_min, freq_max);
 881                 return -EINVAL;
 882         }
 883
 884         /* range check: symbol rate */
 885         switch (c->delivery_system) {
 886         case SYS_DVBS:
 887         case SYS_DVBS2:
 888         case SYS_TURBO:
 889         case SYS_DVBC_ANNEX_A:
 890         case SYS_DVBC_ANNEX_C:
 891                 if ((fe->ops.info.symbol_rate_min &&
 892                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
 893                     (fe->ops.info.symbol_rate_max &&
 894                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
 895                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 896                                fe->dvb->num, fe->id, c->symbol_rate,
 897                                fe->ops.info.symbol_rate_min,
 898                                fe->ops.info.symbol_rate_max);
 899                         return -EINVAL;
 900                 }
 901         default:
 902                 break;
 903         }
 904
 905         return 0;
 906 }
 907
 908 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 909 {
 910         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 911         int i;
 912         u32 delsys;
 913
 914         delsys = c->delivery_system;
 915         memset(c, 0, sizeof(struct dtv_frontend_properties));
 916         c->delivery_system = delsys;
 917
 918         c->state = DTV_CLEAR;
 919
 920         dprintk("%s() Clearing cache for delivery system %d\n", __func__,
 921                 c->delivery_system);
 922
 923         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 924         c->bandwidth_hz = 0;    /* AUTO */
 925         c->guard_interval = GUARD_INTERVAL_AUTO;
 926         c->hierarchy = HIERARCHY_AUTO;
 927         c->symbol_rate = 0;
 928         c->code_rate_HP = FEC_AUTO;
 929         c->code_rate_LP = FEC_AUTO;
 930         c->fec_inner = FEC_AUTO;
 931         c->rolloff = ROLLOFF_AUTO;
 932         c->voltage = SEC_VOLTAGE_OFF;
 933         c->sectone = SEC_TONE_OFF;
 934         c->pilot = PILOT_AUTO;
 935
 936         c->isdbt_partial_reception = 0;
 937         c->isdbt_sb_mode = 0;
 938         c->isdbt_sb_subchannel = 0;
 939         c->isdbt_sb_segment_idx = 0;
 940         c->isdbt_sb_segment_count = 0;
 941         c->isdbt_layer_enabled = 0;
 942         for (i = 0; i < 3; i++) {
 943                 c->layer[i].fec = FEC_AUTO;
 944                 c->layer[i].modulation = QAM_AUTO;
 945                 c->layer[i].interleaving = 0;
 946                 c->layer[i].segment_count = 0;
 947         }
 948
 949         c->isdbs_ts_id = 0;
 950         c->dvbt2_plp_id = 0;
 951
 952         switch (c->delivery_system) {
 953         case SYS_DVBS:
 954         case SYS_DVBS2:
 955         case SYS_TURBO:
 956                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
 957                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
 958                 break;
 959         case SYS_ATSC:
 960                 c->modulation = VSB_8;
 961                 break;
 962         default:
 963                 c->modulation = QAM_AUTO;
 964                 break;
 965         }
 966
 967         return 0;
 968 }
 969
 970 #define _DTV_CMD(n, s, b) \
 971 [n] = { \
 972         .name = #n, \
 973         .cmd  = n, \
 974         .set  = s,\
 975         .buffer = b \
 976 }
 977
 978 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 979         _DTV_CMD(DTV_TUNE, 1, 0),
 980         _DTV_CMD(DTV_CLEAR, 1, 0),
 981
 982         /* Set */
 983         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 984         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 985         _DTV_CMD(DTV_MODULATION, 1, 0),
 986         _DTV_CMD(DTV_INVERSION, 1, 0),
 987         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 988         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 989         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 990         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 991         _DTV_CMD(DTV_TONE, 1, 0),
 992         _DTV_CMD(DTV_PILOT, 1, 0),
 993         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 994         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 995         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 996         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 997         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 998         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 999         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1000
1001         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1002         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1003         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1004         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1005         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1006         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1007         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1008         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1009         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1010         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1011         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1012         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1013         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1014         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1015         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1016         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1017         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1018         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1019
1020         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
1021         _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
1022
1023         /* Get */
1024         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1025         _DTV_CMD(DTV_API_VERSION, 0, 0),
1026         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
1027         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
1028         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
1029         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
1030         _DTV_CMD(DTV_HIERARCHY, 0, 0),
1031
1032         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1033 };
1034
1035 static void dtv_property_dump(struct dtv_property *tvp)
1036 {
1037         int i;
1038
1039         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1040                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1041                         __func__, tvp->cmd);
1042                 return;
1043         }
1044
1045         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
1046                 ,__func__
1047                 ,tvp->cmd
1048                 ,dtv_cmds[ tvp->cmd ].name);
1049
1050         if(dtv_cmds[ tvp->cmd ].buffer) {
1051
1052                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1053                         ,__func__
1054                         ,tvp->u.buffer.len);
1055
1056                 for(i = 0; i < tvp->u.buffer.len; i++)
1057                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1058                                 ,__func__
1059                                 ,i
1060                                 ,tvp->u.buffer.data[i]);
1061
1062         } else
1063                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1064 }
1065
1066 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1067  * drivers can use a single set_frontend tuning function, regardless of whether
1068  * it's being used for the legacy or new API, reducing code and complexity.
1069  */
1070 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1071                                    struct dtv_frontend_properties *c,
1072                                    const struct dvb_frontend_parameters *p)
1073 {
1074         c->frequency = p->frequency;
1075         c->inversion = p->inversion;
1076
1077         switch (dvbv3_type(c->delivery_system)) {
1078         case DVBV3_QPSK:
1079                 dprintk("%s() Preparing QPSK req\n", __func__);
1080                 c->symbol_rate = p->u.qpsk.symbol_rate;
1081                 c->fec_inner = p->u.qpsk.fec_inner;
1082                 break;
1083         case DVBV3_QAM:
1084                 dprintk("%s() Preparing QAM req\n", __func__);
1085                 c->symbol_rate = p->u.qam.symbol_rate;
1086                 c->fec_inner = p->u.qam.fec_inner;
1087                 c->modulation = p->u.qam.modulation;
1088                 break;
1089         case DVBV3_OFDM:
1090                 dprintk("%s() Preparing OFDM req\n", __func__);
1091                 switch (p->u.ofdm.bandwidth) {
1092                 case BANDWIDTH_10_MHZ:
1093                         c->bandwidth_hz = 10000000;
1094                         break;
1095                 case BANDWIDTH_8_MHZ:
1096                         c->bandwidth_hz = 8000000;
1097                         break;
1098                 case BANDWIDTH_7_MHZ:
1099                         c->bandwidth_hz = 7000000;
1100                         break;
1101                 case BANDWIDTH_6_MHZ:
1102                         c->bandwidth_hz = 6000000;
1103                         break;
1104                 case BANDWIDTH_5_MHZ:
1105                         c->bandwidth_hz = 5000000;
1106                         break;
1107                 case BANDWIDTH_1_712_MHZ:
1108                         c->bandwidth_hz = 1712000;
1109                         break;
1110                 case BANDWIDTH_AUTO:
1111                         c->bandwidth_hz = 0;
1112                 }
1113
1114                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1115                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1116                 c->modulation = p->u.ofdm.constellation;
1117                 c->transmission_mode = p->u.ofdm.transmission_mode;
1118                 c->guard_interval = p->u.ofdm.guard_interval;
1119                 c->hierarchy = p->u.ofdm.hierarchy_information;
1120                 break;
1121         case DVBV3_ATSC:
1122                 dprintk("%s() Preparing ATSC req\n", __func__);
1123                 c->modulation = p->u.vsb.modulation;
1124                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1125                         c->delivery_system = SYS_ATSC;
1126                 else
1127                         c->delivery_system = SYS_DVBC_ANNEX_B;
1128                 break;
1129         case DVBV3_UNKNOWN:
1130                 printk(KERN_ERR
1131                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1132                        __func__, c->delivery_system);
1133                 return -EINVAL;
1134         }
1135
1136         return 0;
1137 }
1138
1139 /* Ensure the cached values are set correctly in the frontend
1140  * legacy tuning structures, for the advanced tuning API.
1141  */
1142 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1143                                             struct dvb_frontend_parameters *p)
1144 {
1145         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1146
1147         p->frequency = c->frequency;
1148         p->inversion = c->inversion;
1149
1150         switch (dvbv3_type(c->delivery_system)) {
1151         case DVBV3_UNKNOWN:
1152                 printk(KERN_ERR
1153                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1154                        __func__, c->delivery_system);
1155                 return -EINVAL;
1156         case DVBV3_QPSK:
1157                 dprintk("%s() Preparing QPSK req\n", __func__);
1158                 p->u.qpsk.symbol_rate = c->symbol_rate;
1159                 p->u.qpsk.fec_inner = c->fec_inner;
1160                 break;
1161         case DVBV3_QAM:
1162                 dprintk("%s() Preparing QAM req\n", __func__);
1163                 p->u.qam.symbol_rate = c->symbol_rate;
1164                 p->u.qam.fec_inner = c->fec_inner;
1165                 p->u.qam.modulation = c->modulation;
1166                 break;
1167         case DVBV3_OFDM:
1168                 dprintk("%s() Preparing OFDM req\n", __func__);
1169
1170                 switch (c->bandwidth_hz) {
1171                 case 10000000:
1172                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1173                         break;
1174                 case 8000000:
1175                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1176                         break;
1177                 case 7000000:
1178                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1179                         break;
1180                 case 6000000:
1181                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1182                         break;
1183                 case 5000000:
1184                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1185                         break;
1186                 case 1712000:
1187                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1188                         break;
1189                 case 0:
1190                 default:
1191                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1192                 }
1193                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1194                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1195                 p->u.ofdm.constellation = c->modulation;
1196                 p->u.ofdm.transmission_mode = c->transmission_mode;
1197                 p->u.ofdm.guard_interval = c->guard_interval;
1198                 p->u.ofdm.hierarchy_information = c->hierarchy;
1199                 break;
1200         case DVBV3_ATSC:
1201                 dprintk("%s() Preparing VSB req\n", __func__);
1202                 p->u.vsb.modulation = c->modulation;
1203                 break;
1204         }
1205         return 0;
1206 }
1207
1208 /**
1209  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1210  * @fe:         struct dvb_frontend pointer
1211  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1212  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1213  *
1214  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1215  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1216  * If p_out is not null, it will update the DVBv3 params pointed by it.
1217  */
1218 static int dtv_get_frontend(struct dvb_frontend *fe,
1219                             struct dvb_frontend_parameters *p_out)
1220 {
1221         int r;
1222
1223         if (fe->ops.get_frontend) {
1224                 r = fe->ops.get_frontend(fe);
1225                 if (unlikely(r < 0))
1226                         return r;
1227                 if (p_out)
1228                         dtv_property_legacy_params_sync(fe, p_out);
1229                 return 0;
1230         }
1231
1232         /* As everything is in cache, get_frontend fops are always supported */
1233         return 0;
1234 }
1235
1236 static int dvb_frontend_ioctl_legacy(struct file *file,
1237                         unsigned int cmd, void *parg);
1238 static int dvb_frontend_ioctl_properties(struct file *file,
1239                         unsigned int cmd, void *parg);
1240
1241 static int dtv_property_process_get(struct dvb_frontend *fe,
1242                                     const struct dtv_frontend_properties *c,
1243                                     struct dtv_property *tvp,
1244                                     struct file *file)
1245 {
1246         int r, ncaps;
1247
1248         switch(tvp->cmd) {
1249         case DTV_ENUM_DELSYS:
1250                 ncaps = 0;
1251                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1252                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1253                         ncaps++;
1254                 }
1255                 tvp->u.buffer.len = ncaps;
1256                 break;
1257         case DTV_FREQUENCY:
1258                 tvp->u.data = c->frequency;
1259                 break;
1260         case DTV_MODULATION:
1261                 tvp->u.data = c->modulation;
1262                 break;
1263         case DTV_BANDWIDTH_HZ:
1264                 tvp->u.data = c->bandwidth_hz;
1265                 break;
1266         case DTV_INVERSION:
1267                 tvp->u.data = c->inversion;
1268                 break;
1269         case DTV_SYMBOL_RATE:
1270                 tvp->u.data = c->symbol_rate;
1271                 break;
1272         case DTV_INNER_FEC:
1273                 tvp->u.data = c->fec_inner;
1274                 break;
1275         case DTV_PILOT:
1276                 tvp->u.data = c->pilot;
1277                 break;
1278         case DTV_ROLLOFF:
1279                 tvp->u.data = c->rolloff;
1280                 break;
1281         case DTV_DELIVERY_SYSTEM:
1282                 tvp->u.data = c->delivery_system;
1283                 break;
1284         case DTV_VOLTAGE:
1285                 tvp->u.data = c->voltage;
1286                 break;
1287         case DTV_TONE:
1288                 tvp->u.data = c->sectone;
1289                 break;
1290         case DTV_API_VERSION:
1291                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1292                 break;
1293         case DTV_CODE_RATE_HP:
1294                 tvp->u.data = c->code_rate_HP;
1295                 break;
1296         case DTV_CODE_RATE_LP:
1297                 tvp->u.data = c->code_rate_LP;
1298                 break;
1299         case DTV_GUARD_INTERVAL:
1300                 tvp->u.data = c->guard_interval;
1301                 break;
1302         case DTV_TRANSMISSION_MODE:
1303                 tvp->u.data = c->transmission_mode;
1304                 break;
1305         case DTV_HIERARCHY:
1306                 tvp->u.data = c->hierarchy;
1307                 break;
1308
1309         /* ISDB-T Support here */
1310         case DTV_ISDBT_PARTIAL_RECEPTION:
1311                 tvp->u.data = c->isdbt_partial_reception;
1312                 break;
1313         case DTV_ISDBT_SOUND_BROADCASTING:
1314                 tvp->u.data = c->isdbt_sb_mode;
1315                 break;
1316         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1317                 tvp->u.data = c->isdbt_sb_subchannel;
1318                 break;
1319         case DTV_ISDBT_SB_SEGMENT_IDX:
1320                 tvp->u.data = c->isdbt_sb_segment_idx;
1321                 break;
1322         case DTV_ISDBT_SB_SEGMENT_COUNT:
1323                 tvp->u.data = c->isdbt_sb_segment_count;
1324                 break;
1325         case DTV_ISDBT_LAYER_ENABLED:
1326                 tvp->u.data = c->isdbt_layer_enabled;
1327                 break;
1328         case DTV_ISDBT_LAYERA_FEC:
1329                 tvp->u.data = c->layer[0].fec;
1330                 break;
1331         case DTV_ISDBT_LAYERA_MODULATION:
1332                 tvp->u.data = c->layer[0].modulation;
1333                 break;
1334         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1335                 tvp->u.data = c->layer[0].segment_count;
1336                 break;
1337         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1338                 tvp->u.data = c->layer[0].interleaving;
1339                 break;
1340         case DTV_ISDBT_LAYERB_FEC:
1341                 tvp->u.data = c->layer[1].fec;
1342                 break;
1343         case DTV_ISDBT_LAYERB_MODULATION:
1344                 tvp->u.data = c->layer[1].modulation;
1345                 break;
1346         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1347                 tvp->u.data = c->layer[1].segment_count;
1348                 break;
1349         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1350                 tvp->u.data = c->layer[1].interleaving;
1351                 break;
1352         case DTV_ISDBT_LAYERC_FEC:
1353                 tvp->u.data = c->layer[2].fec;
1354                 break;
1355         case DTV_ISDBT_LAYERC_MODULATION:
1356                 tvp->u.data = c->layer[2].modulation;
1357                 break;
1358         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1359                 tvp->u.data = c->layer[2].segment_count;
1360                 break;
1361         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1362                 tvp->u.data = c->layer[2].interleaving;
1363                 break;
1364         case DTV_ISDBS_TS_ID:
1365                 tvp->u.data = c->isdbs_ts_id;
1366                 break;
1367         case DTV_DVBT2_PLP_ID:
1368                 tvp->u.data = c->dvbt2_plp_id;
1369                 break;
1370         default:
1371                 return -EINVAL;
1372         }
1373
1374         /* Allow the frontend to override outgoing properties */
1375         if (fe->ops.get_property) {
1376                 r = fe->ops.get_property(fe, tvp);
1377                 if (r < 0)
1378                         return r;
1379         }
1380
1381         dtv_property_dump(tvp);
1382
1383         return 0;
1384 }
1385
1386 static int dtv_set_frontend(struct dvb_frontend *fe);
1387
1388 static bool is_dvbv3_delsys(u32 delsys)
1389 {
1390         bool status;
1391
1392         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1393                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1394
1395         return status;
1396 }
1397
1398 static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system)
1399 {
1400         int ncaps, i;
1401         u32 delsys = SYS_UNDEFINED;
1402         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1403         enum dvbv3_emulation_type type;
1404
1405         /*
1406          * It was reported that some old DVBv5 applications were
1407          * filling delivery_system with SYS_UNDEFINED. If this happens,
1408          * assume that the application wants to use the first supported
1409          * delivery system.
1410          */
1411         if (c->delivery_system == SYS_UNDEFINED)
1412                 c->delivery_system = fe->ops.delsys[0];
1413
1414         if (desired_system == SYS_UNDEFINED) {
1415                 /*
1416                  * A DVBv3 call doesn't know what's the desired system.
1417                  * Also, DVBv3 applications don't know that ops.info->type
1418                  * could be changed, and they simply dies when it doesn't
1419                  * match.
1420                  * So, don't change the current delivery system, as it
1421                  * may be trying to do the wrong thing, like setting an
1422                  * ISDB-T frontend as DVB-T. Instead, find the closest
1423                  * DVBv3 system that matches the delivery system.
1424                  */
1425                 if (is_dvbv3_delsys(c->delivery_system)) {
1426                         dprintk("%s() Using delivery system to %d\n",
1427                                 __func__, c->delivery_system);
1428                         return 0;
1429                 }
1430                 type = dvbv3_type(c->delivery_system);
1431                 switch (type) {
1432                 case DVBV3_QPSK:
1433                         desired_system = SYS_DVBS;
1434                         break;
1435                 case DVBV3_QAM:
1436                         desired_system = SYS_DVBC_ANNEX_A;
1437                         break;
1438                 case DVBV3_ATSC:
1439                         desired_system = SYS_ATSC;
1440                         break;
1441                 case DVBV3_OFDM:
1442                         desired_system = SYS_DVBT;
1443                         break;
1444                 default:
1445                         dprintk("%s(): This frontend doesn't support DVBv3 calls\n",
1446                                 __func__);
1447                         return -EINVAL;
1448                 }
1449                 /*
1450                  * Get a delivery system that is compatible with DVBv3
1451                  * NOTE: in order for this to work with softwares like Kaffeine that
1452                  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1453                  *      DVB-S, drivers that support both should put the SYS_DVBS entry
1454                  *      before the SYS_DVBS2, otherwise it won't switch back to DVB-S.
1455                  *      The real fix is that userspace applications should not use DVBv3
1456                  *      and not trust on calling FE_SET_FRONTEND to switch the delivery
1457                  *      system.
1458                  */
1459                 ncaps = 0;
1460                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1461                         if (fe->ops.delsys[ncaps] == desired_system) {
1462                                 delsys = desired_system;
1463                                 break;
1464                         }
1465                         ncaps++;
1466                 }
1467                 if (delsys == SYS_UNDEFINED) {
1468                         dprintk("%s() Couldn't find a delivery system that matches %d\n",
1469                                 __func__, desired_system);
1470                 }
1471         } else {
1472                 /*
1473                  * This is a DVBv5 call. So, it likely knows the supported
1474                  * delivery systems.
1475                  */
1476
1477                 /* Check if the desired delivery system is supported */
1478                 ncaps = 0;
1479                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1480                         if (fe->ops.delsys[ncaps] == desired_system) {
1481                                 c->delivery_system = desired_system;
1482                                 dprintk("%s() Changing delivery system to %d\n",
1483                                         __func__, desired_system);
1484                                 return 0;
1485                         }
1486                         ncaps++;
1487                 }
1488                 type = dvbv3_type(desired_system);
1489
1490                 /*
1491                  * The delivery system is not supported. See if it can be
1492                  * emulated.
1493                  * The emulation only works if the desired system is one of the
1494                  * DVBv3 delivery systems
1495                  */
1496                 if (!is_dvbv3_delsys(desired_system)) {
1497                         dprintk("%s() can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n",
1498                                 __func__);
1499                         return -EINVAL;
1500                 }
1501
1502                 /*
1503                  * Get the last non-DVBv3 delivery system that has the same type
1504                  * of the desired system
1505                  */
1506                 ncaps = 0;
1507                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1508                         if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) &&
1509                             !is_dvbv3_delsys(fe->ops.delsys[ncaps]))
1510                                 delsys = fe->ops.delsys[ncaps];
1511                         ncaps++;
1512                 }
1513                 /* There's nothing compatible with the desired delivery system */
1514                 if (delsys == SYS_UNDEFINED) {
1515                         dprintk("%s() Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n",
1516                                 __func__);
1517                         return -EINVAL;
1518                 }
1519         }
1520
1521         c->delivery_system = delsys;
1522
1523         /*
1524          * The DVBv3 or DVBv5 call is requesting a different system. So,
1525          * emulation is needed.
1526          *
1527          * Emulate newer delivery systems like ISDBT, DVBT and DMBTH
1528          * for older DVBv5 applications. The emulation will try to use
1529          * the auto mode for most things, and will assume that the desired
1530          * delivery system is the last one at the ops.delsys[] array
1531          */
1532         dprintk("%s() Using delivery system %d emulated as if it were a %d\n",
1533                 __func__, delsys, desired_system);
1534
1535         /*
1536          * For now, handles ISDB-T calls. More code may be needed here for the
1537          * other emulated stuff
1538          */
1539         if (type == DVBV3_OFDM) {
1540                 if (c->delivery_system == SYS_ISDBT) {
1541                         dprintk("%s() Using defaults for SYS_ISDBT\n",
1542                                 __func__);
1543                         if (!c->bandwidth_hz)
1544                                 c->bandwidth_hz = 6000000;
1545
1546                         c->isdbt_partial_reception = 0;
1547                         c->isdbt_sb_mode = 0;
1548                         c->isdbt_sb_subchannel = 0;
1549                         c->isdbt_sb_segment_idx = 0;
1550                         c->isdbt_sb_segment_count = 0;
1551                         c->isdbt_layer_enabled = 0;
1552                         for (i = 0; i < 3; i++) {
1553                                 c->layer[i].fec = FEC_AUTO;
1554                                 c->layer[i].modulation = QAM_AUTO;
1555                                 c->layer[i].interleaving = 0;
1556                                 c->layer[i].segment_count = 0;
1557                         }
1558                 }
1559         }
1560         dprintk("change delivery system on cache to %d\n", c->delivery_system);
1561
1562         return 0;
1563 }
1564
1565 static int dtv_property_process_set(struct dvb_frontend *fe,
1566                                     struct dtv_property *tvp,
1567                                     struct file *file)
1568 {
1569         int r = 0;
1570         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1571
1572         /* Allow the frontend to validate incoming properties */
1573         if (fe->ops.set_property) {
1574                 r = fe->ops.set_property(fe, tvp);
1575                 if (r < 0)
1576                         return r;
1577         }
1578
1579         switch(tvp->cmd) {
1580         case DTV_CLEAR:
1581                 /*
1582                  * Reset a cache of data specific to the frontend here. This does
1583                  * not effect hardware.
1584                  */
1585                 dvb_frontend_clear_cache(fe);
1586                 break;
1587         case DTV_TUNE:
1588                 /* interpret the cache of data, build either a traditional frontend
1589                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1590                  * ioctl.
1591                  */
1592                 c->state = tvp->cmd;
1593                 dprintk("%s() Finalised property cache\n", __func__);
1594
1595                 r = dtv_set_frontend(fe);
1596                 break;
1597         case DTV_FREQUENCY:
1598                 c->frequency = tvp->u.data;
1599                 break;
1600         case DTV_MODULATION:
1601                 c->modulation = tvp->u.data;
1602                 break;
1603         case DTV_BANDWIDTH_HZ:
1604                 c->bandwidth_hz = tvp->u.data;
1605                 break;
1606         case DTV_INVERSION:
1607                 c->inversion = tvp->u.data;
1608                 break;
1609         case DTV_SYMBOL_RATE:
1610                 c->symbol_rate = tvp->u.data;
1611                 break;
1612         case DTV_INNER_FEC:
1613                 c->fec_inner = tvp->u.data;
1614                 break;
1615         case DTV_PILOT:
1616                 c->pilot = tvp->u.data;
1617                 break;
1618         case DTV_ROLLOFF:
1619                 c->rolloff = tvp->u.data;
1620                 break;
1621         case DTV_DELIVERY_SYSTEM:
1622                 r = set_delivery_system(fe, tvp->u.data);
1623                 break;
1624         case DTV_VOLTAGE:
1625                 c->voltage = tvp->u.data;
1626                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1627                         (void *)c->voltage);
1628                 break;
1629         case DTV_TONE:
1630                 c->sectone = tvp->u.data;
1631                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1632                         (void *)c->sectone);
1633                 break;
1634         case DTV_CODE_RATE_HP:
1635                 c->code_rate_HP = tvp->u.data;
1636                 break;
1637         case DTV_CODE_RATE_LP:
1638                 c->code_rate_LP = tvp->u.data;
1639                 break;
1640         case DTV_GUARD_INTERVAL:
1641                 c->guard_interval = tvp->u.data;
1642                 break;
1643         case DTV_TRANSMISSION_MODE:
1644                 c->transmission_mode = tvp->u.data;
1645                 break;
1646         case DTV_HIERARCHY:
1647                 c->hierarchy = tvp->u.data;
1648                 break;
1649
1650         /* ISDB-T Support here */
1651         case DTV_ISDBT_PARTIAL_RECEPTION:
1652                 c->isdbt_partial_reception = tvp->u.data;
1653                 break;
1654         case DTV_ISDBT_SOUND_BROADCASTING:
1655                 c->isdbt_sb_mode = tvp->u.data;
1656                 break;
1657         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1658                 c->isdbt_sb_subchannel = tvp->u.data;
1659                 break;
1660         case DTV_ISDBT_SB_SEGMENT_IDX:
1661                 c->isdbt_sb_segment_idx = tvp->u.data;
1662                 break;
1663         case DTV_ISDBT_SB_SEGMENT_COUNT:
1664                 c->isdbt_sb_segment_count = tvp->u.data;
1665                 break;
1666         case DTV_ISDBT_LAYER_ENABLED:
1667                 c->isdbt_layer_enabled = tvp->u.data;
1668                 break;
1669         case DTV_ISDBT_LAYERA_FEC:
1670                 c->layer[0].fec = tvp->u.data;
1671                 break;
1672         case DTV_ISDBT_LAYERA_MODULATION:
1673                 c->layer[0].modulation = tvp->u.data;
1674                 break;
1675         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1676                 c->layer[0].segment_count = tvp->u.data;
1677                 break;
1678         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1679                 c->layer[0].interleaving = tvp->u.data;
1680                 break;
1681         case DTV_ISDBT_LAYERB_FEC:
1682                 c->layer[1].fec = tvp->u.data;
1683                 break;
1684         case DTV_ISDBT_LAYERB_MODULATION:
1685                 c->layer[1].modulation = tvp->u.data;
1686                 break;
1687         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1688                 c->layer[1].segment_count = tvp->u.data;
1689                 break;
1690         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1691                 c->layer[1].interleaving = tvp->u.data;
1692                 break;
1693         case DTV_ISDBT_LAYERC_FEC:
1694                 c->layer[2].fec = tvp->u.data;
1695                 break;
1696         case DTV_ISDBT_LAYERC_MODULATION:
1697                 c->layer[2].modulation = tvp->u.data;
1698                 break;
1699         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1700                 c->layer[2].segment_count = tvp->u.data;
1701                 break;
1702         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1703                 c->layer[2].interleaving = tvp->u.data;
1704                 break;
1705         case DTV_ISDBS_TS_ID:
1706                 c->isdbs_ts_id = tvp->u.data;
1707                 break;
1708         case DTV_DVBT2_PLP_ID:
1709                 c->dvbt2_plp_id = tvp->u.data;
1710                 break;
1711         default:
1712                 return -EINVAL;
1713         }
1714
1715         return r;
1716 }
1717
1718 static int dvb_frontend_ioctl(struct file *file,
1719                         unsigned int cmd, void *parg)
1720 {
1721         struct dvb_device *dvbdev = file->private_data;
1722         struct dvb_frontend *fe = dvbdev->priv;
1723         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1724         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1725         int err = -EOPNOTSUPP;
1726
1727         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1728
1729         if (fepriv->exit != DVB_FE_NO_EXIT)
1730                 return -ENODEV;
1731
1732         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1733             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1734              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1735                 return -EPERM;
1736
1737         if (down_interruptible (&fepriv->sem))
1738                 return -ERESTARTSYS;
1739
1740         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1741                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1742         else {
1743                 c->state = DTV_UNDEFINED;
1744                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1745         }
1746
1747         up(&fepriv->sem);
1748         return err;
1749 }
1750
1751 static int dvb_frontend_ioctl_properties(struct file *file,
1752                         unsigned int cmd, void *parg)
1753 {
1754         struct dvb_device *dvbdev = file->private_data;
1755         struct dvb_frontend *fe = dvbdev->priv;
1756         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1757         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1758         int err = 0;
1759
1760         struct dtv_properties *tvps = NULL;
1761         struct dtv_property *tvp = NULL;
1762         int i;
1763
1764         dprintk("%s\n", __func__);
1765
1766         if(cmd == FE_SET_PROPERTY) {
1767                 tvps = (struct dtv_properties __user *)parg;
1768
1769                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1770                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1771
1772                 /* Put an arbitrary limit on the number of messages that can
1773                  * be sent at once */
1774                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1775                         return -EINVAL;
1776
1777                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1778                 if (!tvp) {
1779                         err = -ENOMEM;
1780                         goto out;
1781                 }
1782
1783                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1784                         err = -EFAULT;
1785                         goto out;
1786                 }
1787
1788                 for (i = 0; i < tvps->num; i++) {
1789                         err = dtv_property_process_set(fe, tvp + i, file);
1790                         if (err < 0)
1791                                 goto out;
1792                         (tvp + i)->result = err;
1793                 }
1794
1795                 if (c->state == DTV_TUNE)
1796                         dprintk("%s() Property cache is full, tuning\n", __func__);
1797
1798         } else
1799         if(cmd == FE_GET_PROPERTY) {
1800                 tvps = (struct dtv_properties __user *)parg;
1801
1802                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1803                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1804
1805                 /* Put an arbitrary limit on the number of messages that can
1806                  * be sent at once */
1807                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1808                         return -EINVAL;
1809
1810                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1811                 if (!tvp) {
1812                         err = -ENOMEM;
1813                         goto out;
1814                 }
1815
1816                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1817                         err = -EFAULT;
1818                         goto out;
1819                 }
1820
1821                 /*
1822                  * Fills the cache out struct with the cache contents, plus
1823                  * the data retrieved from get_frontend, if the frontend
1824                  * is not idle. Otherwise, returns the cached content
1825                  */
1826                 if (fepriv->state != FESTATE_IDLE) {
1827                         err = dtv_get_frontend(fe, NULL);
1828                         if (err < 0)
1829                                 goto out;
1830                 }
1831                 for (i = 0; i < tvps->num; i++) {
1832                         err = dtv_property_process_get(fe, c, tvp + i, file);
1833                         if (err < 0)
1834                                 goto out;
1835                         (tvp + i)->result = err;
1836                 }
1837
1838                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1839                         err = -EFAULT;
1840                         goto out;
1841                 }
1842
1843         } else
1844                 err = -EOPNOTSUPP;
1845
1846 out:
1847         kfree(tvp);
1848         return err;
1849 }
1850
1851 static int dtv_set_frontend(struct dvb_frontend *fe)
1852 {
1853         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1854         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1855         struct dvb_frontend_tune_settings fetunesettings;
1856         u32 rolloff = 0;
1857
1858         if (dvb_frontend_check_parameters(fe) < 0)
1859                 return -EINVAL;
1860
1861         /*
1862          * Initialize output parameters to match the values given by
1863          * the user. FE_SET_FRONTEND triggers an initial frontend event
1864          * with status = 0, which copies output parameters to userspace.
1865          */
1866         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
1867
1868         /*
1869          * Be sure that the bandwidth will be filled for all
1870          * non-satellite systems, as tuners need to know what
1871          * low pass/Nyquist half filter should be applied, in
1872          * order to avoid inter-channel noise.
1873          *
1874          * ISDB-T and DVB-T/T2 already sets bandwidth.
1875          * ATSC and DVB-C don't set, so, the core should fill it.
1876          *
1877          * On DVB-C Annex A and C, the bandwidth is a function of
1878          * the roll-off and symbol rate. Annex B defines different
1879          * roll-off factors depending on the modulation. Fortunately,
1880          * Annex B is only used with 6MHz, so there's no need to
1881          * calculate it.
1882          *
1883          * While not officially supported, a side effect of handling it at
1884          * the cache level is that a program could retrieve the bandwidth
1885          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1886          */
1887         switch (c->delivery_system) {
1888         case SYS_ATSC:
1889         case SYS_DVBC_ANNEX_B:
1890                 c->bandwidth_hz = 6000000;
1891                 break;
1892         case SYS_DVBC_ANNEX_A:
1893                 rolloff = 115;
1894                 break;
1895         case SYS_DVBC_ANNEX_C:
1896                 rolloff = 113;
1897                 break;
1898         default:
1899                 break;
1900         }
1901         if (rolloff)
1902                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
1903
1904         /* force auto frequency inversion if requested */
1905         if (dvb_force_auto_inversion)
1906                 c->inversion = INVERSION_AUTO;
1907
1908         /*
1909          * without hierarchical coding code_rate_LP is irrelevant,
1910          * so we tolerate the otherwise invalid FEC_NONE setting
1911          */
1912         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
1913                 c->code_rate_LP = FEC_AUTO;
1914
1915         /* get frontend-specific tuning settings */
1916         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1917         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1918                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1919                 fepriv->max_drift = fetunesettings.max_drift;
1920                 fepriv->step_size = fetunesettings.step_size;
1921         } else {
1922                 /* default values */
1923                 switch (c->delivery_system) {
1924                 case SYS_DVBS:
1925                 case SYS_DVBS2:
1926                 case SYS_ISDBS:
1927                 case SYS_TURBO:
1928                 case SYS_DVBC_ANNEX_A:
1929                 case SYS_DVBC_ANNEX_C:
1930                         fepriv->min_delay = HZ / 20;
1931                         fepriv->step_size = c->symbol_rate / 16000;
1932                         fepriv->max_drift = c->symbol_rate / 2000;
1933                         break;
1934                 case SYS_DVBT:
1935                 case SYS_DVBT2:
1936                 case SYS_ISDBT:
1937                 case SYS_DMBTH:
1938                         fepriv->min_delay = HZ / 20;
1939                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1940                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1941                         break;
1942                 default:
1943                         /*
1944                          * FIXME: This sounds wrong! if freqency_stepsize is
1945                          * defined by the frontend, why not use it???
1946                          */
1947                         fepriv->min_delay = HZ / 20;
1948                         fepriv->step_size = 0; /* no zigzag */
1949                         fepriv->max_drift = 0;
1950                         break;
1951                 }
1952         }
1953         if (dvb_override_tune_delay > 0)
1954                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1955
1956         fepriv->state = FESTATE_RETUNE;
1957
1958         /* Request the search algorithm to search */
1959         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1960
1961         dvb_frontend_clear_events(fe);
1962         dvb_frontend_add_event(fe, 0);
1963         dvb_frontend_wakeup(fe);
1964         fepriv->status = 0;
1965
1966         return 0;
1967 }
1968
1969
1970 static int dvb_frontend_ioctl_legacy(struct file *file,
1971                         unsigned int cmd, void *parg)
1972 {
1973         struct dvb_device *dvbdev = file->private_data;
1974         struct dvb_frontend *fe = dvbdev->priv;
1975         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1976         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1977         int cb_err, err = -EOPNOTSUPP;
1978
1979         if (fe->dvb->fe_ioctl_override) {
1980                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1981                                                     DVB_FE_IOCTL_PRE);
1982                 if (cb_err < 0)
1983                         return cb_err;
1984                 if (cb_err > 0)
1985                         return 0;
1986                 /* fe_ioctl_override returning 0 allows
1987                  * dvb-core to continue handling the ioctl */
1988         }
1989
1990         switch (cmd) {
1991         case FE_GET_INFO: {
1992                 struct dvb_frontend_info* info = parg;
1993
1994                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1995                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1996
1997                 /*
1998                  * Associate the 4 delivery systems supported by DVBv3
1999                  * API with their DVBv5 counterpart. For the other standards,
2000                  * use the closest type, assuming that it would hopefully
2001                  * work with a DVBv3 application.
2002                  * It should be noticed that, on multi-frontend devices with
2003                  * different types (terrestrial and cable, for example),
2004                  * a pure DVBv3 application won't be able to use all delivery
2005                  * systems. Yet, changing the DVBv5 cache to the other delivery
2006                  * system should be enough for making it work.
2007                  */
2008                 switch (dvbv3_type(c->delivery_system)) {
2009                 case DVBV3_QPSK:
2010                         info->type = FE_QPSK;
2011                         break;
2012                 case DVBV3_ATSC:
2013                         info->type = FE_ATSC;
2014                         break;
2015                 case DVBV3_QAM:
2016                         info->type = FE_QAM;
2017                         break;
2018                 case DVBV3_OFDM:
2019                         info->type = FE_OFDM;
2020                         break;
2021                 default:
2022                         printk(KERN_ERR
2023                                "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2024                                __func__, c->delivery_system);
2025                         fe->ops.info.type = FE_OFDM;
2026                 }
2027                 dprintk("current delivery system on cache: %d, V3 type: %d\n",
2028                         c->delivery_system, fe->ops.info.type);
2029
2030                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2031                  * do it, it is done for it. */
2032                 info->caps |= FE_CAN_INVERSION_AUTO;
2033                 err = 0;
2034                 break;
2035         }
2036
2037         case FE_READ_STATUS: {
2038                 fe_status_t* status = parg;
2039
2040                 /* if retune was requested but hasn't occurred yet, prevent
2041                  * that user get signal state from previous tuning */
2042                 if (fepriv->state == FESTATE_RETUNE ||
2043                     fepriv->state == FESTATE_ERROR) {
2044                         err=0;
2045                         *status = 0;
2046                         break;
2047                 }
2048
2049                 if (fe->ops.read_status)
2050                         err = fe->ops.read_status(fe, status);
2051                 break;
2052         }
2053         case FE_READ_BER:
2054                 if (fe->ops.read_ber)
2055                         err = fe->ops.read_ber(fe, (__u32*) parg);
2056                 break;
2057
2058         case FE_READ_SIGNAL_STRENGTH:
2059                 if (fe->ops.read_signal_strength)
2060                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
2061                 break;
2062
2063         case FE_READ_SNR:
2064                 if (fe->ops.read_snr)
2065                         err = fe->ops.read_snr(fe, (__u16*) parg);
2066                 break;
2067
2068         case FE_READ_UNCORRECTED_BLOCKS:
2069                 if (fe->ops.read_ucblocks)
2070                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
2071                 break;
2072
2073
2074         case FE_DISEQC_RESET_OVERLOAD:
2075                 if (fe->ops.diseqc_reset_overload) {
2076                         err = fe->ops.diseqc_reset_overload(fe);
2077                         fepriv->state = FESTATE_DISEQC;
2078                         fepriv->status = 0;
2079                 }
2080                 break;
2081
2082         case FE_DISEQC_SEND_MASTER_CMD:
2083                 if (fe->ops.diseqc_send_master_cmd) {
2084                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2085                         fepriv->state = FESTATE_DISEQC;
2086                         fepriv->status = 0;
2087                 }
2088                 break;
2089
2090         case FE_DISEQC_SEND_BURST:
2091                 if (fe->ops.diseqc_send_burst) {
2092                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2093                         fepriv->state = FESTATE_DISEQC;
2094                         fepriv->status = 0;
2095                 }
2096                 break;
2097
2098         case FE_SET_TONE:
2099                 if (fe->ops.set_tone) {
2100                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2101                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2102                         fepriv->state = FESTATE_DISEQC;
2103                         fepriv->status = 0;
2104                 }
2105                 break;
2106
2107         case FE_SET_VOLTAGE:
2108                 if (fe->ops.set_voltage) {
2109                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2110                         fepriv->voltage = (fe_sec_voltage_t) parg;
2111                         fepriv->state = FESTATE_DISEQC;
2112                         fepriv->status = 0;
2113                 }
2114                 break;
2115
2116         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2117                 if (fe->ops.dishnetwork_send_legacy_command) {
2118                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2119                         fepriv->state = FESTATE_DISEQC;
2120                         fepriv->status = 0;
2121                 } else if (fe->ops.set_voltage) {
2122                         /*
2123                          * NOTE: This is a fallback condition.  Some frontends
2124                          * (stv0299 for instance) take longer than 8msec to
2125                          * respond to a set_voltage command.  Those switches
2126                          * need custom routines to switch properly.  For all
2127                          * other frontends, the following should work ok.
2128                          * Dish network legacy switches (as used by Dish500)
2129                          * are controlled by sending 9-bit command words
2130                          * spaced 8msec apart.
2131                          * the actual command word is switch/port dependent
2132                          * so it is up to the userspace application to send
2133                          * the right command.
2134                          * The command must always start with a '0' after
2135                          * initialization, so parg is 8 bits and does not
2136                          * include the initialization or start bit
2137                          */
2138                         unsigned long swcmd = ((unsigned long) parg) << 1;
2139                         struct timeval nexttime;
2140                         struct timeval tv[10];
2141                         int i;
2142                         u8 last = 1;
2143                         if (dvb_frontend_debug)
2144                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2145                         do_gettimeofday(&nexttime);
2146                         if (dvb_frontend_debug)
2147                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
2148                         /* before sending a command, initialize by sending
2149                          * a 32ms 18V to the switch
2150                          */
2151                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2152                         dvb_frontend_sleep_until(&nexttime, 32000);
2153
2154                         for (i = 0; i < 9; i++) {
2155                                 if (dvb_frontend_debug)
2156                                         do_gettimeofday(&tv[i + 1]);
2157                                 if ((swcmd & 0x01) != last) {
2158                                         /* set voltage to (last ? 13V : 18V) */
2159                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2160                                         last = (last) ? 0 : 1;
2161                                 }
2162                                 swcmd = swcmd >> 1;
2163                                 if (i != 8)
2164                                         dvb_frontend_sleep_until(&nexttime, 8000);
2165                         }
2166                         if (dvb_frontend_debug) {
2167                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2168                                         __func__, fe->dvb->num);
2169                                 for (i = 1; i < 10; i++)
2170                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2171                         }
2172                         err = 0;
2173                         fepriv->state = FESTATE_DISEQC;
2174                         fepriv->status = 0;
2175                 }
2176                 break;
2177
2178         case FE_DISEQC_RECV_SLAVE_REPLY:
2179                 if (fe->ops.diseqc_recv_slave_reply)
2180                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2181                 break;
2182
2183         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2184                 if (fe->ops.enable_high_lnb_voltage)
2185                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2186                 break;
2187
2188         case FE_SET_FRONTEND:
2189                 err = set_delivery_system(fe, SYS_UNDEFINED);
2190                 if (err)
2191                         break;
2192
2193                 err = dtv_property_cache_sync(fe, c, parg);
2194                 if (err)
2195                         break;
2196                 err = dtv_set_frontend(fe);
2197                 break;
2198         case FE_GET_EVENT:
2199                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2200                 break;
2201
2202         case FE_GET_FRONTEND:
2203                 err = dtv_get_frontend(fe, parg);
2204                 break;
2205
2206         case FE_SET_FRONTEND_TUNE_MODE:
2207                 fepriv->tune_mode_flags = (unsigned long) parg;
2208                 err = 0;
2209                 break;
2210         };
2211
2212         if (fe->dvb->fe_ioctl_override) {
2213                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
2214                                                     DVB_FE_IOCTL_POST);
2215                 if (cb_err < 0)
2216                         return cb_err;
2217         }
2218
2219         return err;
2220 }
2221
2222
2223 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2224 {
2225         struct dvb_device *dvbdev = file->private_data;
2226         struct dvb_frontend *fe = dvbdev->priv;
2227         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2228
2229         dprintk ("%s\n", __func__);
2230
2231         poll_wait (file, &fepriv->events.wait_queue, wait);
2232
2233         if (fepriv->events.eventw != fepriv->events.eventr)
2234                 return (POLLIN | POLLRDNORM | POLLPRI);
2235
2236         return 0;
2237 }
2238
2239 static int dvb_frontend_open(struct inode *inode, struct file *file)
2240 {
2241         struct dvb_device *dvbdev = file->private_data;
2242         struct dvb_frontend *fe = dvbdev->priv;
2243         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2244         struct dvb_adapter *adapter = fe->dvb;
2245         int ret;
2246
2247         dprintk ("%s\n", __func__);
2248         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2249                 return -ENODEV;
2250
2251         if (adapter->mfe_shared) {
2252                 mutex_lock (&adapter->mfe_lock);
2253
2254                 if (adapter->mfe_dvbdev == NULL)
2255                         adapter->mfe_dvbdev = dvbdev;
2256
2257                 else if (adapter->mfe_dvbdev != dvbdev) {
2258                         struct dvb_device
2259                                 *mfedev = adapter->mfe_dvbdev;
2260                         struct dvb_frontend
2261                                 *mfe = mfedev->priv;
2262                         struct dvb_frontend_private
2263                                 *mfepriv = mfe->frontend_priv;
2264                         int mferetry = (dvb_mfe_wait_time << 1);
2265
2266                         mutex_unlock (&adapter->mfe_lock);
2267                         while (mferetry-- && (mfedev->users != -1 ||
2268                                         mfepriv->thread != NULL)) {
2269                                 if(msleep_interruptible(500)) {
2270                                         if(signal_pending(current))
2271                                                 return -EINTR;
2272                                 }
2273                         }
2274
2275                         mutex_lock (&adapter->mfe_lock);
2276                         if(adapter->mfe_dvbdev != dvbdev) {
2277                                 mfedev = adapter->mfe_dvbdev;
2278                                 mfe = mfedev->priv;
2279                                 mfepriv = mfe->frontend_priv;
2280                                 if (mfedev->users != -1 ||
2281                                                 mfepriv->thread != NULL) {
2282                                         mutex_unlock (&adapter->mfe_lock);
2283                                         return -EBUSY;
2284                                 }
2285                                 adapter->mfe_dvbdev = dvbdev;
2286                         }
2287                 }
2288         }
2289
2290         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2291                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2292                         goto err0;
2293
2294                 /* If we took control of the bus, we need to force
2295                    reinitialization.  This is because many ts_bus_ctrl()
2296                    functions strobe the RESET pin on the demod, and if the
2297                    frontend thread already exists then the dvb_init() routine
2298                    won't get called (which is what usually does initial
2299                    register configuration). */
2300                 fepriv->reinitialise = 1;
2301         }
2302
2303         if ((ret = dvb_generic_open (inode, file)) < 0)
2304                 goto err1;
2305
2306         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2307                 /* normal tune mode when opened R/W */
2308                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2309                 fepriv->tone = -1;
2310                 fepriv->voltage = -1;
2311
2312                 ret = dvb_frontend_start (fe);
2313                 if (ret)
2314                         goto err2;
2315
2316                 /*  empty event queue */
2317                 fepriv->events.eventr = fepriv->events.eventw = 0;
2318         }
2319
2320         if (adapter->mfe_shared)
2321                 mutex_unlock (&adapter->mfe_lock);
2322         return ret;
2323
2324 err2:
2325         dvb_generic_release(inode, file);
2326 err1:
2327         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2328                 fe->ops.ts_bus_ctrl(fe, 0);
2329 err0:
2330         if (adapter->mfe_shared)
2331                 mutex_unlock (&adapter->mfe_lock);
2332         return ret;
2333 }
2334
2335 static int dvb_frontend_release(struct inode *inode, struct file *file)
2336 {
2337         struct dvb_device *dvbdev = file->private_data;
2338         struct dvb_frontend *fe = dvbdev->priv;
2339         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2340         int ret;
2341
2342         dprintk ("%s\n", __func__);
2343
2344         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2345                 fepriv->release_jiffies = jiffies;
2346                 mb();
2347         }
2348
2349         ret = dvb_generic_release (inode, file);
2350
2351         if (dvbdev->users == -1) {
2352                 wake_up(&fepriv->wait_queue);
2353                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2354                         fops_put(file->f_op);
2355                         file->f_op = NULL;
2356                         wake_up(&dvbdev->wait_queue);
2357                 }
2358                 if (fe->ops.ts_bus_ctrl)
2359                         fe->ops.ts_bus_ctrl(fe, 0);
2360         }
2361
2362         return ret;
2363 }
2364
2365 static const struct file_operations dvb_frontend_fops = {
2366         .owner          = THIS_MODULE,
2367         .unlocked_ioctl = dvb_generic_ioctl,
2368         .poll           = dvb_frontend_poll,
2369         .open           = dvb_frontend_open,
2370         .release        = dvb_frontend_release,
2371         .llseek         = noop_llseek,
2372 };
2373
2374 int dvb_register_frontend(struct dvb_adapter* dvb,
2375                           struct dvb_frontend* fe)
2376 {
2377         struct dvb_frontend_private *fepriv;
2378         static const struct dvb_device dvbdev_template = {
2379                 .users = ~0,
2380                 .writers = 1,
2381                 .readers = (~0)-1,
2382                 .fops = &dvb_frontend_fops,
2383                 .kernel_ioctl = dvb_frontend_ioctl
2384         };
2385
2386         dprintk ("%s\n", __func__);
2387
2388         if (mutex_lock_interruptible(&frontend_mutex))
2389                 return -ERESTARTSYS;
2390
2391         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2392         if (fe->frontend_priv == NULL) {
2393                 mutex_unlock(&frontend_mutex);
2394                 return -ENOMEM;
2395         }
2396         fepriv = fe->frontend_priv;
2397
2398         sema_init(&fepriv->sem, 1);
2399         init_waitqueue_head (&fepriv->wait_queue);
2400         init_waitqueue_head (&fepriv->events.wait_queue);
2401         mutex_init(&fepriv->events.mtx);
2402         fe->dvb = dvb;
2403         fepriv->inversion = INVERSION_OFF;
2404
2405         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2406                 fe->dvb->num,
2407                 fe->id,
2408                 fe->ops.info.name);
2409
2410         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2411                              fe, DVB_DEVICE_FRONTEND);
2412
2413         /*
2414          * Initialize the cache to the proper values according with the
2415          * first supported delivery system (ops->delsys[0])
2416          */
2417
2418         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2419         dvb_frontend_clear_cache(fe);
2420
2421         mutex_unlock(&frontend_mutex);
2422         return 0;
2423 }
2424 EXPORT_SYMBOL(dvb_register_frontend);
2425
2426 int dvb_unregister_frontend(struct dvb_frontend* fe)
2427 {
2428         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2429         dprintk ("%s\n", __func__);
2430
2431         mutex_lock(&frontend_mutex);
2432         dvb_frontend_stop (fe);
2433         mutex_unlock(&frontend_mutex);
2434
2435         if (fepriv->dvbdev->users < -1)
2436                 wait_event(fepriv->dvbdev->wait_queue,
2437                                 fepriv->dvbdev->users==-1);
2438
2439         mutex_lock(&frontend_mutex);
2440         dvb_unregister_device (fepriv->dvbdev);
2441
2442         /* fe is invalid now */
2443         kfree(fepriv);
2444         mutex_unlock(&frontend_mutex);
2445         return 0;
2446 }
2447 EXPORT_SYMBOL(dvb_unregister_frontend);
2448
2449 #ifdef CONFIG_MEDIA_ATTACH
2450 void dvb_frontend_detach(struct dvb_frontend* fe)
2451 {
2452         void *ptr;
2453
2454         if (fe->ops.release_sec) {
2455                 fe->ops.release_sec(fe);
2456                 symbol_put_addr(fe->ops.release_sec);
2457         }
2458         if (fe->ops.tuner_ops.release) {
2459                 fe->ops.tuner_ops.release(fe);
2460                 symbol_put_addr(fe->ops.tuner_ops.release);
2461         }
2462         if (fe->ops.analog_ops.release) {
2463                 fe->ops.analog_ops.release(fe);
2464                 symbol_put_addr(fe->ops.analog_ops.release);
2465         }
2466         ptr = (void*)fe->ops.release;
2467         if (ptr) {
2468                 fe->ops.release(fe);
2469                 symbol_put_addr(ptr);
2470         }
2471 }
2472 #else
2473 void dvb_frontend_detach(struct dvb_frontend* fe)
2474 {
2475         if (fe->ops.release_sec)
2476                 fe->ops.release_sec(fe);
2477         if (fe->ops.tuner_ops.release)
2478                 fe->ops.tuner_ops.release(fe);
2479         if (fe->ops.analog_ops.release)
2480                 fe->ops.analog_ops.release(fe);
2481         if (fe->ops.release)
2482                 fe->ops.release(fe);
2483 }
2484 #endif
2485 EXPORT_SYMBOL(dvb_frontend_detach);