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 #include <linux/string.h>
  29 #include <linux/kernel.h>
  30 #include <linux/sched.h>
  31 #include <linux/wait.h>
  32 #include <linux/slab.h>
  33 #include <linux/poll.h>
  34 #include <linux/semaphore.h>
  35 #include <linux/module.h>
  36 #include <linux/list.h>
  37 #include <linux/freezer.h>
  38 #include <linux/jiffies.h>
  39 #include <linux/kthread.h>
  40 #include <asm/processor.h>
  41
  42 #include "dvb_frontend.h"
  43 #include "dvbdev.h"
  44 #include <linux/dvb/version.h>
  45
  46 static int dvb_frontend_debug;
  47 static int dvb_shutdown_timeout;
  48 static int dvb_force_auto_inversion;
  49 static int dvb_override_tune_delay;
  50 static int dvb_powerdown_on_sleep = 1;
  51 static int dvb_mfe_wait_time = 5;
  52
  53 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  54 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  55 module_param(dvb_shutdown_timeout, int, 0644);
  56 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  57 module_param(dvb_force_auto_inversion, int, 0644);
  58 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  59 module_param(dvb_override_tune_delay, int, 0644);
  60 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  61 module_param(dvb_powerdown_on_sleep, int, 0644);
  62 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  63 module_param(dvb_mfe_wait_time, int, 0644);
  64 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)");
  65
  66 #define dprintk if (dvb_frontend_debug) printk
  67
  68 #define FESTATE_IDLE 1
  69 #define FESTATE_RETUNE 2
  70 #define FESTATE_TUNING_FAST 4
  71 #define FESTATE_TUNING_SLOW 8
  72 #define FESTATE_TUNED 16
  73 #define FESTATE_ZIGZAG_FAST 32
  74 #define FESTATE_ZIGZAG_SLOW 64
  75 #define FESTATE_DISEQC 128
  76 #define FESTATE_ERROR 256
  77 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  78 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  79 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  80 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  81
  82 #define FE_ALGO_HW              1
  83 /*
  84  * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  85  * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  86  * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  87  * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  88  * FESTATE_TUNED. The frontend has successfully locked on.
  89  * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  90  * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  91  * FESTATE_DISEQC. A DISEQC command has just been issued.
  92  * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  93  * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  94  * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  95  * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  96  */
  97
  98 #define DVB_FE_NO_EXIT  0
  99 #define DVB_FE_NORMAL_EXIT      1
 100 #define DVB_FE_DEVICE_REMOVED   2
 101
 102 static DEFINE_MUTEX(frontend_mutex);
 103
 104 struct dvb_frontend_private {
 105
 106         /* thread/frontend values */
 107         struct dvb_device *dvbdev;
 108         struct dvb_frontend_parameters parameters_in;
 109         struct dvb_frontend_parameters parameters_out;
 110         struct dvb_fe_events events;
 111         struct semaphore sem;
 112         struct list_head list_head;
 113         wait_queue_head_t wait_queue;
 114         struct task_struct *thread;
 115         unsigned long release_jiffies;
 116         unsigned int exit;
 117         unsigned int wakeup;
 118         fe_status_t status;
 119         unsigned long tune_mode_flags;
 120         unsigned int delay;
 121         unsigned int reinitialise;
 122         int tone;
 123         int voltage;
 124
 125         /* swzigzag values */
 126         unsigned int state;
 127         unsigned int bending;
 128         int lnb_drift;
 129         unsigned int inversion;
 130         unsigned int auto_step;
 131         unsigned int auto_sub_step;
 132         unsigned int started_auto_step;
 133         unsigned int min_delay;
 134         unsigned int max_drift;
 135         unsigned int step_size;
 136         int quality;
 137         unsigned int check_wrapped;
 138         enum dvbfe_search algo_status;
 139 };
 140
 141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
 142
 143 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 144 {
 145         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 146         struct dvb_fe_events *events = &fepriv->events;
 147         struct dvb_frontend_event *e;
 148         int wp;
 149
 150         dprintk ("%s\n", __func__);
 151
 152         if ((status & FE_HAS_LOCK) && fe->ops.get_frontend)
 153                 fe->ops.get_frontend(fe, &fepriv->parameters_out);
 154
 155         mutex_lock(&events->mtx);
 156
 157         wp = (events->eventw + 1) % MAX_EVENT;
 158         if (wp == events->eventr) {
 159                 events->overflow = 1;
 160                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 161         }
 162
 163         e = &events->events[events->eventw];
 164         e->status = status;
 165         e->parameters = fepriv->parameters_out;
 166
 167         events->eventw = wp;
 168
 169         mutex_unlock(&events->mtx);
 170
 171         wake_up_interruptible (&events->wait_queue);
 172 }
 173
 174 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 175                             struct dvb_frontend_event *event, int flags)
 176 {
 177         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 178         struct dvb_fe_events *events = &fepriv->events;
 179
 180         dprintk ("%s\n", __func__);
 181
 182         if (events->overflow) {
 183                 events->overflow = 0;
 184                 return -EOVERFLOW;
 185         }
 186
 187         if (events->eventw == events->eventr) {
 188                 int ret;
 189
 190                 if (flags & O_NONBLOCK)
 191                         return -EWOULDBLOCK;
 192
 193                 up(&fepriv->sem);
 194
 195                 ret = wait_event_interruptible (events->wait_queue,
 196                                                 events->eventw != events->eventr);
 197
 198                 if (down_interruptible (&fepriv->sem))
 199                         return -ERESTARTSYS;
 200
 201                 if (ret < 0)
 202                         return ret;
 203         }
 204
 205         mutex_lock(&events->mtx);
 206         *event = events->events[events->eventr];
 207         events->eventr = (events->eventr + 1) % MAX_EVENT;
 208         mutex_unlock(&events->mtx);
 209
 210         return 0;
 211 }
 212
 213 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
 214 {
 215         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 216         struct dvb_fe_events *events = &fepriv->events;
 217
 218         mutex_lock(&events->mtx);
 219         events->eventr = events->eventw;
 220         mutex_unlock(&events->mtx);
 221 }
 222
 223 static void dvb_frontend_init(struct dvb_frontend *fe)
 224 {
 225         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
 226                  fe->dvb->num,
 227                  fe->id,
 228                  fe->ops.info.name);
 229
 230         if (fe->ops.init)
 231                 fe->ops.init(fe);
 232         if (fe->ops.tuner_ops.init) {
 233                 if (fe->ops.i2c_gate_ctrl)
 234                         fe->ops.i2c_gate_ctrl(fe, 1);
 235                 fe->ops.tuner_ops.init(fe);
 236                 if (fe->ops.i2c_gate_ctrl)
 237                         fe->ops.i2c_gate_ctrl(fe, 0);
 238         }
 239 }
 240
 241 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
 242 {
 243         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 244
 245         fepriv->reinitialise = 1;
 246         dvb_frontend_wakeup(fe);
 247 }
 248 EXPORT_SYMBOL(dvb_frontend_reinitialise);
 249
 250 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
 251 {
 252         int q2;
 253
 254         dprintk ("%s\n", __func__);
 255
 256         if (locked)
 257                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
 258         else
 259                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
 260
 261         q2 = fepriv->quality - 128;
 262         q2 *= q2;
 263
 264         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
 265 }
 266
 267 /**
 268  * Performs automatic twiddling of frontend parameters.
 269  *
 270  * @param fe The frontend concerned.
 271  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
 272  * @returns Number of complete iterations that have been performed.
 273  */
 274 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
 275 {
 276         int autoinversion;
 277         int ready = 0;
 278         int fe_set_err = 0;
 279         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 280         int original_inversion = fepriv->parameters_in.inversion;
 281         u32 original_frequency = fepriv->parameters_in.frequency;
 282
 283         /* are we using autoinversion? */
 284         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 285                          (fepriv->parameters_in.inversion == INVERSION_AUTO));
 286
 287         /* setup parameters correctly */
 288         while(!ready) {
 289                 /* calculate the lnb_drift */
 290                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
 291
 292                 /* wrap the auto_step if we've exceeded the maximum drift */
 293                 if (fepriv->lnb_drift > fepriv->max_drift) {
 294                         fepriv->auto_step = 0;
 295                         fepriv->auto_sub_step = 0;
 296                         fepriv->lnb_drift = 0;
 297                 }
 298
 299                 /* perform inversion and +/- zigzag */
 300                 switch(fepriv->auto_sub_step) {
 301                 case 0:
 302                         /* try with the current inversion and current drift setting */
 303                         ready = 1;
 304                         break;
 305
 306                 case 1:
 307                         if (!autoinversion) break;
 308
 309                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 310                         ready = 1;
 311                         break;
 312
 313                 case 2:
 314                         if (fepriv->lnb_drift == 0) break;
 315
 316                         fepriv->lnb_drift = -fepriv->lnb_drift;
 317                         ready = 1;
 318                         break;
 319
 320                 case 3:
 321                         if (fepriv->lnb_drift == 0) break;
 322                         if (!autoinversion) break;
 323
 324                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
 325                         fepriv->lnb_drift = -fepriv->lnb_drift;
 326                         ready = 1;
 327                         break;
 328
 329                 default:
 330                         fepriv->auto_step++;
 331                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
 332                         break;
 333                 }
 334
 335                 if (!ready) fepriv->auto_sub_step++;
 336         }
 337
 338         /* if this attempt would hit where we started, indicate a complete
 339          * iteration has occurred */
 340         if ((fepriv->auto_step == fepriv->started_auto_step) &&
 341             (fepriv->auto_sub_step == 0) && check_wrapped) {
 342                 return 1;
 343         }
 344
 345         dprintk("%s: drift:%i inversion:%i auto_step:%i "
 346                 "auto_sub_step:%i started_auto_step:%i\n",
 347                 __func__, fepriv->lnb_drift, fepriv->inversion,
 348                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
 349
 350         /* set the frontend itself */
 351         fepriv->parameters_in.frequency += fepriv->lnb_drift;
 352         if (autoinversion)
 353                 fepriv->parameters_in.inversion = fepriv->inversion;
 354         if (fe->ops.set_frontend)
 355                 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters_in);
 356         fepriv->parameters_out = fepriv->parameters_in;
 357         if (fe_set_err < 0) {
 358                 fepriv->state = FESTATE_ERROR;
 359                 return fe_set_err;
 360         }
 361
 362         fepriv->parameters_in.frequency = original_frequency;
 363         fepriv->parameters_in.inversion = original_inversion;
 364
 365         fepriv->auto_sub_step++;
 366         return 0;
 367 }
 368
 369 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
 370 {
 371         fe_status_t s = 0;
 372         int retval = 0;
 373         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 374
 375         /* if we've got no parameters, just keep idling */
 376         if (fepriv->state & FESTATE_IDLE) {
 377                 fepriv->delay = 3*HZ;
 378                 fepriv->quality = 0;
 379                 return;
 380         }
 381
 382         /* in SCAN mode, we just set the frontend when asked and leave it alone */
 383         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
 384                 if (fepriv->state & FESTATE_RETUNE) {
 385                         if (fe->ops.set_frontend)
 386                                 retval = fe->ops.set_frontend(fe,
 387                                                         &fepriv->parameters_in);
 388                         fepriv->parameters_out = fepriv->parameters_in;
 389                         if (retval < 0)
 390                                 fepriv->state = FESTATE_ERROR;
 391                         else
 392                                 fepriv->state = FESTATE_TUNED;
 393                 }
 394                 fepriv->delay = 3*HZ;
 395                 fepriv->quality = 0;
 396                 return;
 397         }
 398
 399         /* get the frontend status */
 400         if (fepriv->state & FESTATE_RETUNE) {
 401                 s = 0;
 402         } else {
 403                 if (fe->ops.read_status)
 404                         fe->ops.read_status(fe, &s);
 405                 if (s != fepriv->status) {
 406                         dvb_frontend_add_event(fe, s);
 407                         fepriv->status = s;
 408                 }
 409         }
 410
 411         /* if we're not tuned, and we have a lock, move to the TUNED state */
 412         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
 413                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 414                 fepriv->state = FESTATE_TUNED;
 415
 416                 /* if we're tuned, then we have determined the correct inversion */
 417                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
 418                     (fepriv->parameters_in.inversion == INVERSION_AUTO)) {
 419                         fepriv->parameters_in.inversion = fepriv->inversion;
 420                 }
 421                 return;
 422         }
 423
 424         /* if we are tuned already, check we're still locked */
 425         if (fepriv->state & FESTATE_TUNED) {
 426                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 427
 428                 /* we're tuned, and the lock is still good... */
 429                 if (s & FE_HAS_LOCK) {
 430                         return;
 431                 } else { /* if we _WERE_ tuned, but now don't have a lock */
 432                         fepriv->state = FESTATE_ZIGZAG_FAST;
 433                         fepriv->started_auto_step = fepriv->auto_step;
 434                         fepriv->check_wrapped = 0;
 435                 }
 436         }
 437
 438         /* don't actually do anything if we're in the LOSTLOCK state,
 439          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
 440         if ((fepriv->state & FESTATE_LOSTLOCK) &&
 441             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
 442                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 443                 return;
 444         }
 445
 446         /* don't do anything if we're in the DISEQC state, since this
 447          * might be someone with a motorized dish controlled by DISEQC.
 448          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
 449         if (fepriv->state & FESTATE_DISEQC) {
 450                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 451                 return;
 452         }
 453
 454         /* if we're in the RETUNE state, set everything up for a brand
 455          * new scan, keeping the current inversion setting, as the next
 456          * tune is _very_ likely to require the same */
 457         if (fepriv->state & FESTATE_RETUNE) {
 458                 fepriv->lnb_drift = 0;
 459                 fepriv->auto_step = 0;
 460                 fepriv->auto_sub_step = 0;
 461                 fepriv->started_auto_step = 0;
 462                 fepriv->check_wrapped = 0;
 463         }
 464
 465         /* fast zigzag. */
 466         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
 467                 fepriv->delay = fepriv->min_delay;
 468
 469                 /* perform a tune */
 470                 retval = dvb_frontend_swzigzag_autotune(fe,
 471                                                         fepriv->check_wrapped);
 472                 if (retval < 0) {
 473                         return;
 474                 } else if (retval) {
 475                         /* OK, if we've run out of trials at the fast speed.
 476                          * Drop back to slow for the _next_ attempt */
 477                         fepriv->state = FESTATE_SEARCHING_SLOW;
 478                         fepriv->started_auto_step = fepriv->auto_step;
 479                         return;
 480                 }
 481                 fepriv->check_wrapped = 1;
 482
 483                 /* if we've just retuned, enter the ZIGZAG_FAST state.
 484                  * This ensures we cannot return from an
 485                  * FE_SET_FRONTEND ioctl before the first frontend tune
 486                  * occurs */
 487                 if (fepriv->state & FESTATE_RETUNE) {
 488                         fepriv->state = FESTATE_TUNING_FAST;
 489                 }
 490         }
 491
 492         /* slow zigzag */
 493         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
 494                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
 495
 496                 /* Note: don't bother checking for wrapping; we stay in this
 497                  * state until we get a lock */
 498                 dvb_frontend_swzigzag_autotune(fe, 0);
 499         }
 500 }
 501
 502 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
 503 {
 504         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 505
 506         if (fepriv->exit != DVB_FE_NO_EXIT)
 507                 return 1;
 508
 509         if (fepriv->dvbdev->writers == 1)
 510                 if (time_after(jiffies, fepriv->release_jiffies +
 511                                   dvb_shutdown_timeout * HZ))
 512                         return 1;
 513
 514         return 0;
 515 }
 516
 517 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
 518 {
 519         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 520
 521         if (fepriv->wakeup) {
 522                 fepriv->wakeup = 0;
 523                 return 1;
 524         }
 525         return dvb_frontend_is_exiting(fe);
 526 }
 527
 528 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
 529 {
 530         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 531
 532         fepriv->wakeup = 1;
 533         wake_up_interruptible(&fepriv->wait_queue);
 534 }
 535
 536 static int dvb_frontend_thread(void *data)
 537 {
 538         struct dvb_frontend *fe = data;
 539         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 540         fe_status_t s;
 541         enum dvbfe_algo algo;
 542
 543         struct dvb_frontend_parameters *params;
 544
 545         dprintk("%s\n", __func__);
 546
 547         fepriv->check_wrapped = 0;
 548         fepriv->quality = 0;
 549         fepriv->delay = 3*HZ;
 550         fepriv->status = 0;
 551         fepriv->wakeup = 0;
 552         fepriv->reinitialise = 0;
 553
 554         dvb_frontend_init(fe);
 555
 556         set_freezable();
 557         while (1) {
 558                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 559 restart:
 560                 wait_event_interruptible_timeout(fepriv->wait_queue,
 561                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 562                                 || freezing(current),
 563                         fepriv->delay);
 564
 565                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 566                         /* got signal or quitting */
 567                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 568                         break;
 569                 }
 570
 571                 if (try_to_freeze())
 572                         goto restart;
 573
 574                 if (down_interruptible(&fepriv->sem))
 575                         break;
 576
 577                 if (fepriv->reinitialise) {
 578                         dvb_frontend_init(fe);
 579                         if (fe->ops.set_tone && fepriv->tone != -1)
 580                                 fe->ops.set_tone(fe, fepriv->tone);
 581                         if (fe->ops.set_voltage && fepriv->voltage != -1)
 582                                 fe->ops.set_voltage(fe, fepriv->voltage);
 583                         fepriv->reinitialise = 0;
 584                 }
 585
 586                 /* do an iteration of the tuning loop */
 587                 if (fe->ops.get_frontend_algo) {
 588                         algo = fe->ops.get_frontend_algo(fe);
 589                         switch (algo) {
 590                         case DVBFE_ALGO_HW:
 591                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 592                                 params = NULL; /* have we been asked to RETUNE ? */
 593
 594                                 if (fepriv->state & FESTATE_RETUNE) {
 595                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 596                                         params = &fepriv->parameters_in;
 597                                         fepriv->state = FESTATE_TUNED;
 598                                 }
 599
 600                                 if (fe->ops.tune)
 601                                         fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
 602                                 if (params)
 603                                         fepriv->parameters_out = *params;
 604
 605                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 606                                         dprintk("%s: state changed, adding current state\n", __func__);
 607                                         dvb_frontend_add_event(fe, s);
 608                                         fepriv->status = s;
 609                                 }
 610                                 break;
 611                         case DVBFE_ALGO_SW:
 612                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 613                                 dvb_frontend_swzigzag(fe);
 614                                 break;
 615                         case DVBFE_ALGO_CUSTOM:
 616                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 617                                 if (fepriv->state & FESTATE_RETUNE) {
 618                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 619                                         fepriv->state = FESTATE_TUNED;
 620                                 }
 621                                 /* Case where we are going to search for a carrier
 622                                  * User asked us to retune again for some reason, possibly
 623                                  * requesting a search with a new set of parameters
 624                                  */
 625                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 626                                         if (fe->ops.search) {
 627                                                 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters_in);
 628                                                 /* We did do a search as was requested, the flags are
 629                                                  * now unset as well and has the flags wrt to search.
 630                                                  */
 631                                         } else {
 632                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 633                                         }
 634                                 }
 635                                 /* Track the carrier if the search was successful */
 636                                 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
 637                                         if (fe->ops.track)
 638                                                 fe->ops.track(fe, &fepriv->parameters_in);
 639                                 } else {
 640                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 641                                         fepriv->delay = HZ / 2;
 642                                 }
 643                                 fepriv->parameters_out = fepriv->parameters_in;
 644                                 fe->ops.read_status(fe, &s);
 645                                 if (s != fepriv->status) {
 646                                         dvb_frontend_add_event(fe, s); /* update event list */
 647                                         fepriv->status = s;
 648                                         if (!(s & FE_HAS_LOCK)) {
 649                                                 fepriv->delay = HZ / 10;
 650                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 651                                         } else {
 652                                                 fepriv->delay = 60 * HZ;
 653                                         }
 654                                 }
 655                                 break;
 656                         default:
 657                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 658                                 break;
 659                         }
 660                 } else {
 661                         dvb_frontend_swzigzag(fe);
 662                 }
 663         }
 664
 665         if (dvb_powerdown_on_sleep) {
 666                 if (fe->ops.set_voltage)
 667                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 668                 if (fe->ops.tuner_ops.sleep) {
 669                         if (fe->ops.i2c_gate_ctrl)
 670                                 fe->ops.i2c_gate_ctrl(fe, 1);
 671                         fe->ops.tuner_ops.sleep(fe);
 672                         if (fe->ops.i2c_gate_ctrl)
 673                                 fe->ops.i2c_gate_ctrl(fe, 0);
 674                 }
 675                 if (fe->ops.sleep)
 676                         fe->ops.sleep(fe);
 677         }
 678
 679         fepriv->thread = NULL;
 680         if (kthread_should_stop())
 681                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 682         else
 683                 fepriv->exit = DVB_FE_NO_EXIT;
 684         mb();
 685
 686         dvb_frontend_wakeup(fe);
 687         return 0;
 688 }
 689
 690 static void dvb_frontend_stop(struct dvb_frontend *fe)
 691 {
 692         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 693
 694         dprintk ("%s\n", __func__);
 695
 696         fepriv->exit = DVB_FE_NORMAL_EXIT;
 697         mb();
 698
 699         if (!fepriv->thread)
 700                 return;
 701
 702         kthread_stop(fepriv->thread);
 703
 704         sema_init(&fepriv->sem, 1);
 705         fepriv->state = FESTATE_IDLE;
 706
 707         /* paranoia check in case a signal arrived */
 708         if (fepriv->thread)
 709                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 710                                 fepriv->thread);
 711 }
 712
 713 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 714 {
 715         return ((curtime.tv_usec < lasttime.tv_usec) ?
 716                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 717                 curtime.tv_usec - lasttime.tv_usec);
 718 }
 719 EXPORT_SYMBOL(timeval_usec_diff);
 720
 721 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 722 {
 723         curtime->tv_usec += add_usec;
 724         if (curtime->tv_usec >= 1000000) {
 725                 curtime->tv_usec -= 1000000;
 726                 curtime->tv_sec++;
 727         }
 728 }
 729
 730 /*
 731  * Sleep until gettimeofday() > waketime + add_usec
 732  * This needs to be as precise as possible, but as the delay is
 733  * usually between 2ms and 32ms, it is done using a scheduled msleep
 734  * followed by usleep (normally a busy-wait loop) for the remainder
 735  */
 736 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 737 {
 738         struct timeval lasttime;
 739         s32 delta, newdelta;
 740
 741         timeval_usec_add(waketime, add_usec);
 742
 743         do_gettimeofday(&lasttime);
 744         delta = timeval_usec_diff(lasttime, *waketime);
 745         if (delta > 2500) {
 746                 msleep((delta - 1500) / 1000);
 747                 do_gettimeofday(&lasttime);
 748                 newdelta = timeval_usec_diff(lasttime, *waketime);
 749                 delta = (newdelta > delta) ? 0 : newdelta;
 750         }
 751         if (delta > 0)
 752                 udelay(delta);
 753 }
 754 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 755
 756 static int dvb_frontend_start(struct dvb_frontend *fe)
 757 {
 758         int ret;
 759         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 760         struct task_struct *fe_thread;
 761
 762         dprintk ("%s\n", __func__);
 763
 764         if (fepriv->thread) {
 765                 if (fepriv->exit == DVB_FE_NO_EXIT)
 766                         return 0;
 767                 else
 768                         dvb_frontend_stop (fe);
 769         }
 770
 771         if (signal_pending(current))
 772                 return -EINTR;
 773         if (down_interruptible (&fepriv->sem))
 774                 return -EINTR;
 775
 776         fepriv->state = FESTATE_IDLE;
 777         fepriv->exit = DVB_FE_NO_EXIT;
 778         fepriv->thread = NULL;
 779         mb();
 780
 781         fe_thread = kthread_run(dvb_frontend_thread, fe,
 782                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 783         if (IS_ERR(fe_thread)) {
 784                 ret = PTR_ERR(fe_thread);
 785                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 786                 up(&fepriv->sem);
 787                 return ret;
 788         }
 789         fepriv->thread = fe_thread;
 790         return 0;
 791 }
 792
 793 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 794                                         u32 *freq_min, u32 *freq_max)
 795 {
 796         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 797
 798         if (fe->ops.info.frequency_max == 0)
 799                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 800         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 801                 *freq_max = fe->ops.info.frequency_max;
 802         else
 803                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 804
 805         if (*freq_min == 0 || *freq_max == 0)
 806                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 807                        fe->dvb->num,fe->id);
 808 }
 809
 810 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 811                                 struct dvb_frontend_parameters *parms)
 812 {
 813         u32 freq_min;
 814         u32 freq_max;
 815
 816         /* range check: frequency */
 817         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 818         if ((freq_min && parms->frequency < freq_min) ||
 819             (freq_max && parms->frequency > freq_max)) {
 820                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 821                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 822                 return -EINVAL;
 823         }
 824
 825         /* range check: symbol rate */
 826         if (fe->ops.info.type == FE_QPSK) {
 827                 if ((fe->ops.info.symbol_rate_min &&
 828                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 829                     (fe->ops.info.symbol_rate_max &&
 830                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 831                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 832                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 833                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 834                         return -EINVAL;
 835                 }
 836
 837         } else if (fe->ops.info.type == FE_QAM) {
 838                 if ((fe->ops.info.symbol_rate_min &&
 839                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 840                     (fe->ops.info.symbol_rate_max &&
 841                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 842                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 843                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 844                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 845                         return -EINVAL;
 846                 }
 847         }
 848
 849         /* check for supported modulation */
 850         if (fe->ops.info.type == FE_QAM &&
 851             (parms->u.qam.modulation > QAM_AUTO ||
 852              !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
 853                 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
 854                        fe->dvb->num, fe->id, parms->u.qam.modulation);
 855                         return -EINVAL;
 856         }
 857
 858         return 0;
 859 }
 860
 861 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 862 {
 863         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 864         int i;
 865
 866         memset(c, 0, sizeof(struct dtv_frontend_properties));
 867
 868         c->state = DTV_CLEAR;
 869         c->delivery_system = SYS_UNDEFINED;
 870         c->inversion = INVERSION_AUTO;
 871         c->fec_inner = FEC_AUTO;
 872         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 873         c->bandwidth_hz = BANDWIDTH_AUTO;
 874         c->guard_interval = GUARD_INTERVAL_AUTO;
 875         c->hierarchy = HIERARCHY_AUTO;
 876         c->symbol_rate = QAM_AUTO;
 877         c->code_rate_HP = FEC_AUTO;
 878         c->code_rate_LP = FEC_AUTO;
 879
 880         c->isdbt_partial_reception = -1;
 881         c->isdbt_sb_mode = -1;
 882         c->isdbt_sb_subchannel = -1;
 883         c->isdbt_sb_segment_idx = -1;
 884         c->isdbt_sb_segment_count = -1;
 885         c->isdbt_layer_enabled = 0x7;
 886         for (i = 0; i < 3; i++) {
 887                 c->layer[i].fec = FEC_AUTO;
 888                 c->layer[i].modulation = QAM_AUTO;
 889                 c->layer[i].interleaving = -1;
 890                 c->layer[i].segment_count = -1;
 891         }
 892
 893         return 0;
 894 }
 895
 896 #define _DTV_CMD(n, s, b) \
 897 [n] = { \
 898         .name = #n, \
 899         .cmd  = n, \
 900         .set  = s,\
 901         .buffer = b \
 902 }
 903
 904 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 905         _DTV_CMD(DTV_TUNE, 1, 0),
 906         _DTV_CMD(DTV_CLEAR, 1, 0),
 907
 908         /* Set */
 909         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 910         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 911         _DTV_CMD(DTV_MODULATION, 1, 0),
 912         _DTV_CMD(DTV_INVERSION, 1, 0),
 913         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 914         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 915         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 916         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 917         _DTV_CMD(DTV_TONE, 1, 0),
 918         _DTV_CMD(DTV_PILOT, 1, 0),
 919         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 920         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 921         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 922         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 923         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 924         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 925         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
 926
 927         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
 928         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
 929         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
 930         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
 931         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
 932         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
 933         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
 934         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
 935         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
 936         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
 937         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
 938         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
 939         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
 940         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
 941         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
 942         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
 943         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
 944         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
 945
 946         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
 947         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
 948         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
 949         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
 950         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
 951         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
 952         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
 953         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
 954         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
 955         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
 956         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
 957         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
 958         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
 959         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
 960         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
 961         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
 962         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
 963         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
 964
 965         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
 966         _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
 967
 968         /* Get */
 969         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
 970         _DTV_CMD(DTV_API_VERSION, 0, 0),
 971         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
 972         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
 973         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
 974         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
 975         _DTV_CMD(DTV_HIERARCHY, 0, 0),
 976 };
 977
 978 static void dtv_property_dump(struct dtv_property *tvp)
 979 {
 980         int i;
 981
 982         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 983                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 984                         __func__, tvp->cmd);
 985                 return;
 986         }
 987
 988         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 989                 ,__func__
 990                 ,tvp->cmd
 991                 ,dtv_cmds[ tvp->cmd ].name);
 992
 993         if(dtv_cmds[ tvp->cmd ].buffer) {
 994
 995                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 996                         ,__func__
 997                         ,tvp->u.buffer.len);
 998
 999                 for(i = 0; i < tvp->u.buffer.len; i++)
1000                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1001                                 ,__func__
1002                                 ,i
1003                                 ,tvp->u.buffer.data[i]);
1004
1005         } else
1006                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1007 }
1008
1009 static int is_legacy_delivery_system(fe_delivery_system_t s)
1010 {
1011         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1012            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1013            (s == SYS_ATSC))
1014                 return 1;
1015
1016         return 0;
1017 }
1018
1019 /* Initialize the cache with some default values derived from the
1020  * legacy frontend_info structure.
1021  */
1022 static void dtv_property_cache_init(struct dvb_frontend *fe,
1023                                     struct dtv_frontend_properties *c)
1024 {
1025         switch (fe->ops.info.type) {
1026         case FE_QPSK:
1027                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1028                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1029                 c->delivery_system = SYS_DVBS;
1030                 break;
1031         case FE_QAM:
1032                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1033                 break;
1034         case FE_OFDM:
1035                 c->delivery_system = SYS_DVBT;
1036                 break;
1037         case FE_ATSC:
1038                 break;
1039         }
1040 }
1041
1042 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1043  * drivers can use a single set_frontend tuning function, regardless of whether
1044  * it's being used for the legacy or new API, reducing code and complexity.
1045  */
1046 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1047                                     struct dtv_frontend_properties *c,
1048                                     const struct dvb_frontend_parameters *p)
1049 {
1050         c->frequency = p->frequency;
1051         c->inversion = p->inversion;
1052
1053         switch (fe->ops.info.type) {
1054         case FE_QPSK:
1055                 c->symbol_rate = p->u.qpsk.symbol_rate;
1056                 c->fec_inner = p->u.qpsk.fec_inner;
1057                 break;
1058         case FE_QAM:
1059                 c->symbol_rate = p->u.qam.symbol_rate;
1060                 c->fec_inner = p->u.qam.fec_inner;
1061                 c->modulation = p->u.qam.modulation;
1062                 break;
1063         case FE_OFDM:
1064                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1065                         c->bandwidth_hz = 6000000;
1066                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1067                         c->bandwidth_hz = 7000000;
1068                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1069                         c->bandwidth_hz = 8000000;
1070                 else
1071                         /* Including BANDWIDTH_AUTO */
1072                         c->bandwidth_hz = 0;
1073                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1074                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1075                 c->modulation = p->u.ofdm.constellation;
1076                 c->transmission_mode = p->u.ofdm.transmission_mode;
1077                 c->guard_interval = p->u.ofdm.guard_interval;
1078                 c->hierarchy = p->u.ofdm.hierarchy_information;
1079                 break;
1080         case FE_ATSC:
1081                 c->modulation = p->u.vsb.modulation;
1082                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1083                         c->delivery_system = SYS_ATSC;
1084                 else
1085                         c->delivery_system = SYS_DVBC_ANNEX_B;
1086                 break;
1087         }
1088 }
1089
1090 /* Ensure the cached values are set correctly in the frontend
1091  * legacy tuning structures, for the advanced tuning API.
1092  */
1093 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1094 {
1095         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1096         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1097         struct dvb_frontend_parameters *p = &fepriv->parameters_in;
1098
1099         p->frequency = c->frequency;
1100         p->inversion = c->inversion;
1101
1102         switch (fe->ops.info.type) {
1103         case FE_QPSK:
1104                 dprintk("%s() Preparing QPSK req\n", __func__);
1105                 p->u.qpsk.symbol_rate = c->symbol_rate;
1106                 p->u.qpsk.fec_inner = c->fec_inner;
1107                 break;
1108         case FE_QAM:
1109                 dprintk("%s() Preparing QAM req\n", __func__);
1110                 p->u.qam.symbol_rate = c->symbol_rate;
1111                 p->u.qam.fec_inner = c->fec_inner;
1112                 p->u.qam.modulation = c->modulation;
1113                 break;
1114         case FE_OFDM:
1115                 dprintk("%s() Preparing OFDM req\n", __func__);
1116                 if (c->bandwidth_hz == 6000000)
1117                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1118                 else if (c->bandwidth_hz == 7000000)
1119                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1120                 else if (c->bandwidth_hz == 8000000)
1121                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1122                 else
1123                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1124                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1125                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1126                 p->u.ofdm.constellation = c->modulation;
1127                 p->u.ofdm.transmission_mode = c->transmission_mode;
1128                 p->u.ofdm.guard_interval = c->guard_interval;
1129                 p->u.ofdm.hierarchy_information = c->hierarchy;
1130                 break;
1131         case FE_ATSC:
1132                 dprintk("%s() Preparing VSB req\n", __func__);
1133                 p->u.vsb.modulation = c->modulation;
1134                 break;
1135         }
1136 }
1137
1138 /* Ensure the cached values are set correctly in the frontend
1139  * legacy tuning structures, for the legacy tuning API.
1140  */
1141 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1142 {
1143         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1144         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1145         struct dvb_frontend_parameters *p = &fepriv->parameters_in;
1146
1147         p->frequency = c->frequency;
1148         p->inversion = c->inversion;
1149
1150         if (c->delivery_system == SYS_DSS ||
1151             c->delivery_system == SYS_DVBS ||
1152             c->delivery_system == SYS_DVBS2 ||
1153             c->delivery_system == SYS_ISDBS ||
1154             c->delivery_system == SYS_TURBO) {
1155                 p->u.qpsk.symbol_rate = c->symbol_rate;
1156                 p->u.qpsk.fec_inner = c->fec_inner;
1157         }
1158
1159         /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1160         if ((c->delivery_system == SYS_ISDBT) ||
1161             (c->delivery_system == SYS_DVBT2)) {
1162                 p->u.ofdm.constellation = QAM_AUTO;
1163                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1164                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1165                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1166                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1167                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1168                 if (c->bandwidth_hz == 8000000)
1169                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1170                 else if (c->bandwidth_hz == 7000000)
1171                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1172                 else if (c->bandwidth_hz == 6000000)
1173                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1174                 else
1175                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1176         }
1177 }
1178
1179 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1180 {
1181         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1182
1183         /* For legacy delivery systems we don't need the delivery_system to
1184          * be specified, but we populate the older structures from the cache
1185          * so we can call set_frontend on older drivers.
1186          */
1187         if(is_legacy_delivery_system(c->delivery_system)) {
1188
1189                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1190                 dtv_property_legacy_params_sync(fe);
1191
1192         } else {
1193                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1194
1195                 /* For advanced delivery systems / modulation types ...
1196                  * we seed the lecacy dvb_frontend_parameters structure
1197                  * so that the sanity checking code later in the IOCTL processing
1198                  * can validate our basic frequency ranges, symbolrates, modulation
1199                  * etc.
1200                  */
1201                 dtv_property_adv_params_sync(fe);
1202         }
1203 }
1204
1205 static int dvb_frontend_ioctl_legacy(struct file *file,
1206                         unsigned int cmd, void *parg);
1207 static int dvb_frontend_ioctl_properties(struct file *file,
1208                         unsigned int cmd, void *parg);
1209
1210 static int dtv_property_process_get(struct dvb_frontend *fe,
1211                                     struct dtv_property *tvp,
1212                                     struct file *file)
1213 {
1214         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1215         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1216         struct dtv_frontend_properties cdetected;
1217         int r;
1218
1219         /*
1220          * If the driver implements a get_frontend function, then convert
1221          * detected parameters to S2API properties.
1222          */
1223         if (fe->ops.get_frontend) {
1224                 cdetected = *c;
1225                 dtv_property_cache_sync(fe, &cdetected, &fepriv->parameters_out);
1226                 c = &cdetected;
1227         }
1228
1229         switch(tvp->cmd) {
1230         case DTV_FREQUENCY:
1231                 tvp->u.data = c->frequency;
1232                 break;
1233         case DTV_MODULATION:
1234                 tvp->u.data = c->modulation;
1235                 break;
1236         case DTV_BANDWIDTH_HZ:
1237                 tvp->u.data = c->bandwidth_hz;
1238                 break;
1239         case DTV_INVERSION:
1240                 tvp->u.data = c->inversion;
1241                 break;
1242         case DTV_SYMBOL_RATE:
1243                 tvp->u.data = c->symbol_rate;
1244                 break;
1245         case DTV_INNER_FEC:
1246                 tvp->u.data = c->fec_inner;
1247                 break;
1248         case DTV_PILOT:
1249                 tvp->u.data = c->pilot;
1250                 break;
1251         case DTV_ROLLOFF:
1252                 tvp->u.data = c->rolloff;
1253                 break;
1254         case DTV_DELIVERY_SYSTEM:
1255                 tvp->u.data = c->delivery_system;
1256                 break;
1257         case DTV_VOLTAGE:
1258                 tvp->u.data = c->voltage;
1259                 break;
1260         case DTV_TONE:
1261                 tvp->u.data = c->sectone;
1262                 break;
1263         case DTV_API_VERSION:
1264                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1265                 break;
1266         case DTV_CODE_RATE_HP:
1267                 tvp->u.data = c->code_rate_HP;
1268                 break;
1269         case DTV_CODE_RATE_LP:
1270                 tvp->u.data = c->code_rate_LP;
1271                 break;
1272         case DTV_GUARD_INTERVAL:
1273                 tvp->u.data = c->guard_interval;
1274                 break;
1275         case DTV_TRANSMISSION_MODE:
1276                 tvp->u.data = c->transmission_mode;
1277                 break;
1278         case DTV_HIERARCHY:
1279                 tvp->u.data = c->hierarchy;
1280                 break;
1281
1282         /* ISDB-T Support here */
1283         case DTV_ISDBT_PARTIAL_RECEPTION:
1284                 tvp->u.data = c->isdbt_partial_reception;
1285                 break;
1286         case DTV_ISDBT_SOUND_BROADCASTING:
1287                 tvp->u.data = c->isdbt_sb_mode;
1288                 break;
1289         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1290                 tvp->u.data = c->isdbt_sb_subchannel;
1291                 break;
1292         case DTV_ISDBT_SB_SEGMENT_IDX:
1293                 tvp->u.data = c->isdbt_sb_segment_idx;
1294                 break;
1295         case DTV_ISDBT_SB_SEGMENT_COUNT:
1296                 tvp->u.data = c->isdbt_sb_segment_count;
1297                 break;
1298         case DTV_ISDBT_LAYER_ENABLED:
1299                 tvp->u.data = c->isdbt_layer_enabled;
1300                 break;
1301         case DTV_ISDBT_LAYERA_FEC:
1302                 tvp->u.data = c->layer[0].fec;
1303                 break;
1304         case DTV_ISDBT_LAYERA_MODULATION:
1305                 tvp->u.data = c->layer[0].modulation;
1306                 break;
1307         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1308                 tvp->u.data = c->layer[0].segment_count;
1309                 break;
1310         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1311                 tvp->u.data = c->layer[0].interleaving;
1312                 break;
1313         case DTV_ISDBT_LAYERB_FEC:
1314                 tvp->u.data = c->layer[1].fec;
1315                 break;
1316         case DTV_ISDBT_LAYERB_MODULATION:
1317                 tvp->u.data = c->layer[1].modulation;
1318                 break;
1319         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1320                 tvp->u.data = c->layer[1].segment_count;
1321                 break;
1322         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1323                 tvp->u.data = c->layer[1].interleaving;
1324                 break;
1325         case DTV_ISDBT_LAYERC_FEC:
1326                 tvp->u.data = c->layer[2].fec;
1327                 break;
1328         case DTV_ISDBT_LAYERC_MODULATION:
1329                 tvp->u.data = c->layer[2].modulation;
1330                 break;
1331         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1332                 tvp->u.data = c->layer[2].segment_count;
1333                 break;
1334         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1335                 tvp->u.data = c->layer[2].interleaving;
1336                 break;
1337         case DTV_ISDBS_TS_ID:
1338                 tvp->u.data = c->isdbs_ts_id;
1339                 break;
1340         case DTV_DVBT2_PLP_ID:
1341                 tvp->u.data = c->dvbt2_plp_id;
1342                 break;
1343         default:
1344                 return -EINVAL;
1345         }
1346
1347         /* Allow the frontend to override outgoing properties */
1348         if (fe->ops.get_property) {
1349                 r = fe->ops.get_property(fe, tvp);
1350                 if (r < 0)
1351                         return r;
1352         }
1353
1354         dtv_property_dump(tvp);
1355
1356         return 0;
1357 }
1358
1359 static int dtv_property_process_set(struct dvb_frontend *fe,
1360                                     struct dtv_property *tvp,
1361                                     struct file *file)
1362 {
1363         int r = 0;
1364         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1365         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1366         dtv_property_dump(tvp);
1367
1368         /* Allow the frontend to validate incoming properties */
1369         if (fe->ops.set_property) {
1370                 r = fe->ops.set_property(fe, tvp);
1371                 if (r < 0)
1372                         return r;
1373         }
1374
1375         switch(tvp->cmd) {
1376         case DTV_CLEAR:
1377                 /* Reset a cache of data specific to the frontend here. This does
1378                  * not effect hardware.
1379                  */
1380                 dvb_frontend_clear_cache(fe);
1381                 dprintk("%s() Flushing property cache\n", __func__);
1382                 break;
1383         case DTV_TUNE:
1384                 /* interpret the cache of data, build either a traditional frontend
1385                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1386                  * ioctl.
1387                  */
1388                 c->state = tvp->cmd;
1389                 dprintk("%s() Finalised property cache\n", __func__);
1390                 dtv_property_cache_submit(fe);
1391
1392                 r = dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND,
1393                         &fepriv->parameters_in);
1394                 break;
1395         case DTV_FREQUENCY:
1396                 c->frequency = tvp->u.data;
1397                 break;
1398         case DTV_MODULATION:
1399                 c->modulation = tvp->u.data;
1400                 break;
1401         case DTV_BANDWIDTH_HZ:
1402                 c->bandwidth_hz = tvp->u.data;
1403                 break;
1404         case DTV_INVERSION:
1405                 c->inversion = tvp->u.data;
1406                 break;
1407         case DTV_SYMBOL_RATE:
1408                 c->symbol_rate = tvp->u.data;
1409                 break;
1410         case DTV_INNER_FEC:
1411                 c->fec_inner = tvp->u.data;
1412                 break;
1413         case DTV_PILOT:
1414                 c->pilot = tvp->u.data;
1415                 break;
1416         case DTV_ROLLOFF:
1417                 c->rolloff = tvp->u.data;
1418                 break;
1419         case DTV_DELIVERY_SYSTEM:
1420                 c->delivery_system = tvp->u.data;
1421                 break;
1422         case DTV_VOLTAGE:
1423                 c->voltage = tvp->u.data;
1424                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1425                         (void *)c->voltage);
1426                 break;
1427         case DTV_TONE:
1428                 c->sectone = tvp->u.data;
1429                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1430                         (void *)c->sectone);
1431                 break;
1432         case DTV_CODE_RATE_HP:
1433                 c->code_rate_HP = tvp->u.data;
1434                 break;
1435         case DTV_CODE_RATE_LP:
1436                 c->code_rate_LP = tvp->u.data;
1437                 break;
1438         case DTV_GUARD_INTERVAL:
1439                 c->guard_interval = tvp->u.data;
1440                 break;
1441         case DTV_TRANSMISSION_MODE:
1442                 c->transmission_mode = tvp->u.data;
1443                 break;
1444         case DTV_HIERARCHY:
1445                 c->hierarchy = tvp->u.data;
1446                 break;
1447
1448         /* ISDB-T Support here */
1449         case DTV_ISDBT_PARTIAL_RECEPTION:
1450                 c->isdbt_partial_reception = tvp->u.data;
1451                 break;
1452         case DTV_ISDBT_SOUND_BROADCASTING:
1453                 c->isdbt_sb_mode = tvp->u.data;
1454                 break;
1455         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1456                 c->isdbt_sb_subchannel = tvp->u.data;
1457                 break;
1458         case DTV_ISDBT_SB_SEGMENT_IDX:
1459                 c->isdbt_sb_segment_idx = tvp->u.data;
1460                 break;
1461         case DTV_ISDBT_SB_SEGMENT_COUNT:
1462                 c->isdbt_sb_segment_count = tvp->u.data;
1463                 break;
1464         case DTV_ISDBT_LAYER_ENABLED:
1465                 c->isdbt_layer_enabled = tvp->u.data;
1466                 break;
1467         case DTV_ISDBT_LAYERA_FEC:
1468                 c->layer[0].fec = tvp->u.data;
1469                 break;
1470         case DTV_ISDBT_LAYERA_MODULATION:
1471                 c->layer[0].modulation = tvp->u.data;
1472                 break;
1473         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1474                 c->layer[0].segment_count = tvp->u.data;
1475                 break;
1476         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1477                 c->layer[0].interleaving = tvp->u.data;
1478                 break;
1479         case DTV_ISDBT_LAYERB_FEC:
1480                 c->layer[1].fec = tvp->u.data;
1481                 break;
1482         case DTV_ISDBT_LAYERB_MODULATION:
1483                 c->layer[1].modulation = tvp->u.data;
1484                 break;
1485         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1486                 c->layer[1].segment_count = tvp->u.data;
1487                 break;
1488         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1489                 c->layer[1].interleaving = tvp->u.data;
1490                 break;
1491         case DTV_ISDBT_LAYERC_FEC:
1492                 c->layer[2].fec = tvp->u.data;
1493                 break;
1494         case DTV_ISDBT_LAYERC_MODULATION:
1495                 c->layer[2].modulation = tvp->u.data;
1496                 break;
1497         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1498                 c->layer[2].segment_count = tvp->u.data;
1499                 break;
1500         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1501                 c->layer[2].interleaving = tvp->u.data;
1502                 break;
1503         case DTV_ISDBS_TS_ID:
1504                 c->isdbs_ts_id = tvp->u.data;
1505                 break;
1506         case DTV_DVBT2_PLP_ID:
1507                 c->dvbt2_plp_id = tvp->u.data;
1508                 break;
1509         default:
1510                 return -EINVAL;
1511         }
1512
1513         return r;
1514 }
1515
1516 static int dvb_frontend_ioctl(struct file *file,
1517                         unsigned int cmd, void *parg)
1518 {
1519         struct dvb_device *dvbdev = file->private_data;
1520         struct dvb_frontend *fe = dvbdev->priv;
1521         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1522         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1523         int err = -EOPNOTSUPP;
1524
1525         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1526
1527         if (fepriv->exit != DVB_FE_NO_EXIT)
1528                 return -ENODEV;
1529
1530         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1531             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1532              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1533                 return -EPERM;
1534
1535         if (down_interruptible (&fepriv->sem))
1536                 return -ERESTARTSYS;
1537
1538         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1539                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1540         else {
1541                 c->state = DTV_UNDEFINED;
1542                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1543         }
1544
1545         up(&fepriv->sem);
1546         return err;
1547 }
1548
1549 static int dvb_frontend_ioctl_properties(struct file *file,
1550                         unsigned int cmd, void *parg)
1551 {
1552         struct dvb_device *dvbdev = file->private_data;
1553         struct dvb_frontend *fe = dvbdev->priv;
1554         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1555         int err = 0;
1556
1557         struct dtv_properties *tvps = NULL;
1558         struct dtv_property *tvp = NULL;
1559         int i;
1560
1561         dprintk("%s\n", __func__);
1562
1563         if(cmd == FE_SET_PROPERTY) {
1564                 tvps = (struct dtv_properties __user *)parg;
1565
1566                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1567                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1568
1569                 /* Put an arbitrary limit on the number of messages that can
1570                  * be sent at once */
1571                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1572                         return -EINVAL;
1573
1574                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1575                 if (!tvp) {
1576                         err = -ENOMEM;
1577                         goto out;
1578                 }
1579
1580                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1581                         err = -EFAULT;
1582                         goto out;
1583                 }
1584
1585                 for (i = 0; i < tvps->num; i++) {
1586                         err = dtv_property_process_set(fe, tvp + i, file);
1587                         if (err < 0)
1588                                 goto out;
1589                         (tvp + i)->result = err;
1590                 }
1591
1592                 if (c->state == DTV_TUNE)
1593                         dprintk("%s() Property cache is full, tuning\n", __func__);
1594
1595         } else
1596         if(cmd == FE_GET_PROPERTY) {
1597
1598                 tvps = (struct dtv_properties __user *)parg;
1599
1600                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1601                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1602
1603                 /* Put an arbitrary limit on the number of messages that can
1604                  * be sent at once */
1605                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1606                         return -EINVAL;
1607
1608                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1609                 if (!tvp) {
1610                         err = -ENOMEM;
1611                         goto out;
1612                 }
1613
1614                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1615                         err = -EFAULT;
1616                         goto out;
1617                 }
1618
1619                 for (i = 0; i < tvps->num; i++) {
1620                         err = dtv_property_process_get(fe, tvp + i, file);
1621                         if (err < 0)
1622                                 goto out;
1623                         (tvp + i)->result = err;
1624                 }
1625
1626                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1627                         err = -EFAULT;
1628                         goto out;
1629                 }
1630
1631         } else
1632                 err = -EOPNOTSUPP;
1633
1634 out:
1635         kfree(tvp);
1636         return err;
1637 }
1638
1639 static int dvb_frontend_ioctl_legacy(struct file *file,
1640                         unsigned int cmd, void *parg)
1641 {
1642         struct dvb_device *dvbdev = file->private_data;
1643         struct dvb_frontend *fe = dvbdev->priv;
1644         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1645         int cb_err, err = -EOPNOTSUPP;
1646
1647         if (fe->dvb->fe_ioctl_override) {
1648                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1649                                                     DVB_FE_IOCTL_PRE);
1650                 if (cb_err < 0)
1651                         return cb_err;
1652                 if (cb_err > 0)
1653                         return 0;
1654                 /* fe_ioctl_override returning 0 allows
1655                  * dvb-core to continue handling the ioctl */
1656         }
1657
1658         switch (cmd) {
1659         case FE_GET_INFO: {
1660                 struct dvb_frontend_info* info = parg;
1661                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1662                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1663
1664                 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
1665                 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
1666                         info->caps |= FE_CAN_INVERSION_AUTO;
1667                 err = 0;
1668                 break;
1669         }
1670
1671         case FE_READ_STATUS: {
1672                 fe_status_t* status = parg;
1673
1674                 /* if retune was requested but hasn't occurred yet, prevent
1675                  * that user get signal state from previous tuning */
1676                 if (fepriv->state == FESTATE_RETUNE ||
1677                     fepriv->state == FESTATE_ERROR) {
1678                         err=0;
1679                         *status = 0;
1680                         break;
1681                 }
1682
1683                 if (fe->ops.read_status)
1684                         err = fe->ops.read_status(fe, status);
1685                 break;
1686         }
1687         case FE_READ_BER:
1688                 if (fe->ops.read_ber)
1689                         err = fe->ops.read_ber(fe, (__u32*) parg);
1690                 break;
1691
1692         case FE_READ_SIGNAL_STRENGTH:
1693                 if (fe->ops.read_signal_strength)
1694                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1695                 break;
1696
1697         case FE_READ_SNR:
1698                 if (fe->ops.read_snr)
1699                         err = fe->ops.read_snr(fe, (__u16*) parg);
1700                 break;
1701
1702         case FE_READ_UNCORRECTED_BLOCKS:
1703                 if (fe->ops.read_ucblocks)
1704                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1705                 break;
1706
1707
1708         case FE_DISEQC_RESET_OVERLOAD:
1709                 if (fe->ops.diseqc_reset_overload) {
1710                         err = fe->ops.diseqc_reset_overload(fe);
1711                         fepriv->state = FESTATE_DISEQC;
1712                         fepriv->status = 0;
1713                 }
1714                 break;
1715
1716         case FE_DISEQC_SEND_MASTER_CMD:
1717                 if (fe->ops.diseqc_send_master_cmd) {
1718                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1719                         fepriv->state = FESTATE_DISEQC;
1720                         fepriv->status = 0;
1721                 }
1722                 break;
1723
1724         case FE_DISEQC_SEND_BURST:
1725                 if (fe->ops.diseqc_send_burst) {
1726                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1727                         fepriv->state = FESTATE_DISEQC;
1728                         fepriv->status = 0;
1729                 }
1730                 break;
1731
1732         case FE_SET_TONE:
1733                 if (fe->ops.set_tone) {
1734                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1735                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1736                         fepriv->state = FESTATE_DISEQC;
1737                         fepriv->status = 0;
1738                 }
1739                 break;
1740
1741         case FE_SET_VOLTAGE:
1742                 if (fe->ops.set_voltage) {
1743                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1744                         fepriv->voltage = (fe_sec_voltage_t) parg;
1745                         fepriv->state = FESTATE_DISEQC;
1746                         fepriv->status = 0;
1747                 }
1748                 break;
1749
1750         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1751                 if (fe->ops.dishnetwork_send_legacy_command) {
1752                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1753                         fepriv->state = FESTATE_DISEQC;
1754                         fepriv->status = 0;
1755                 } else if (fe->ops.set_voltage) {
1756                         /*
1757                          * NOTE: This is a fallback condition.  Some frontends
1758                          * (stv0299 for instance) take longer than 8msec to
1759                          * respond to a set_voltage command.  Those switches
1760                          * need custom routines to switch properly.  For all
1761                          * other frontends, the following should work ok.
1762                          * Dish network legacy switches (as used by Dish500)
1763                          * are controlled by sending 9-bit command words
1764                          * spaced 8msec apart.
1765                          * the actual command word is switch/port dependent
1766                          * so it is up to the userspace application to send
1767                          * the right command.
1768                          * The command must always start with a '0' after
1769                          * initialization, so parg is 8 bits and does not
1770                          * include the initialization or start bit
1771                          */
1772                         unsigned long swcmd = ((unsigned long) parg) << 1;
1773                         struct timeval nexttime;
1774                         struct timeval tv[10];
1775                         int i;
1776                         u8 last = 1;
1777                         if (dvb_frontend_debug)
1778                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1779                         do_gettimeofday(&nexttime);
1780                         if (dvb_frontend_debug)
1781                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1782                         /* before sending a command, initialize by sending
1783                          * a 32ms 18V to the switch
1784                          */
1785                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1786                         dvb_frontend_sleep_until(&nexttime, 32000);
1787
1788                         for (i = 0; i < 9; i++) {
1789                                 if (dvb_frontend_debug)
1790                                         do_gettimeofday(&tv[i + 1]);
1791                                 if ((swcmd & 0x01) != last) {
1792                                         /* set voltage to (last ? 13V : 18V) */
1793                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1794                                         last = (last) ? 0 : 1;
1795                                 }
1796                                 swcmd = swcmd >> 1;
1797                                 if (i != 8)
1798                                         dvb_frontend_sleep_until(&nexttime, 8000);
1799                         }
1800                         if (dvb_frontend_debug) {
1801                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1802                                         __func__, fe->dvb->num);
1803                                 for (i = 1; i < 10; i++)
1804                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1805                         }
1806                         err = 0;
1807                         fepriv->state = FESTATE_DISEQC;
1808                         fepriv->status = 0;
1809                 }
1810                 break;
1811
1812         case FE_DISEQC_RECV_SLAVE_REPLY:
1813                 if (fe->ops.diseqc_recv_slave_reply)
1814                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1815                 break;
1816
1817         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1818                 if (fe->ops.enable_high_lnb_voltage)
1819                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1820                 break;
1821
1822         case FE_SET_FRONTEND: {
1823                 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1824                 struct dvb_frontend_tune_settings fetunesettings;
1825
1826                 if (c->state == DTV_TUNE) {
1827                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters_in) < 0) {
1828                                 err = -EINVAL;
1829                                 break;
1830                         }
1831                 } else {
1832                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1833                                 err = -EINVAL;
1834                                 break;
1835                         }
1836
1837                         memcpy (&fepriv->parameters_in, parg,
1838                                 sizeof (struct dvb_frontend_parameters));
1839                         dtv_property_cache_init(fe, c);
1840                         dtv_property_cache_sync(fe, c, &fepriv->parameters_in);
1841                 }
1842
1843                 /*
1844                  * Initialize output parameters to match the values given by
1845                  * the user. FE_SET_FRONTEND triggers an initial frontend event
1846                  * with status = 0, which copies output parameters to userspace.
1847                  */
1848                 fepriv->parameters_out = fepriv->parameters_in;
1849
1850                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1851                 memcpy(&fetunesettings.parameters, parg,
1852                        sizeof (struct dvb_frontend_parameters));
1853
1854                 /* force auto frequency inversion if requested */
1855                 if (dvb_force_auto_inversion) {
1856                         fepriv->parameters_in.inversion = INVERSION_AUTO;
1857                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1858                 }
1859                 if (fe->ops.info.type == FE_OFDM) {
1860                         /* without hierarchical coding code_rate_LP is irrelevant,
1861                          * so we tolerate the otherwise invalid FEC_NONE setting */
1862                         if (fepriv->parameters_in.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1863                             fepriv->parameters_in.u.ofdm.code_rate_LP == FEC_NONE)
1864                                 fepriv->parameters_in.u.ofdm.code_rate_LP = FEC_AUTO;
1865                 }
1866
1867                 /* get frontend-specific tuning settings */
1868                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1869                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1870                         fepriv->max_drift = fetunesettings.max_drift;
1871                         fepriv->step_size = fetunesettings.step_size;
1872                 } else {
1873                         /* default values */
1874                         switch(fe->ops.info.type) {
1875                         case FE_QPSK:
1876                                 fepriv->min_delay = HZ/20;
1877                                 fepriv->step_size = fepriv->parameters_in.u.qpsk.symbol_rate / 16000;
1878                                 fepriv->max_drift = fepriv->parameters_in.u.qpsk.symbol_rate / 2000;
1879                                 break;
1880
1881                         case FE_QAM:
1882                                 fepriv->min_delay = HZ/20;
1883                                 fepriv->step_size = 0; /* no zigzag */
1884                                 fepriv->max_drift = 0;
1885                                 break;
1886
1887                         case FE_OFDM:
1888                                 fepriv->min_delay = HZ/20;
1889                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1890                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1891                                 break;
1892                         case FE_ATSC:
1893                                 fepriv->min_delay = HZ/20;
1894                                 fepriv->step_size = 0;
1895                                 fepriv->max_drift = 0;
1896                                 break;
1897                         }
1898                 }
1899                 if (dvb_override_tune_delay > 0)
1900                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1901
1902                 fepriv->state = FESTATE_RETUNE;
1903
1904                 /* Request the search algorithm to search */
1905                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1906
1907                 dvb_frontend_clear_events(fe);
1908                 dvb_frontend_add_event(fe, 0);
1909                 dvb_frontend_wakeup(fe);
1910                 fepriv->status = 0;
1911                 err = 0;
1912                 break;
1913         }
1914
1915         case FE_GET_EVENT:
1916                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1917                 break;
1918
1919         case FE_GET_FRONTEND:
1920                 if (fe->ops.get_frontend) {
1921                         err = fe->ops.get_frontend(fe, &fepriv->parameters_out);
1922                         memcpy(parg, &fepriv->parameters_out, sizeof(struct dvb_frontend_parameters));
1923                 }
1924                 break;
1925
1926         case FE_SET_FRONTEND_TUNE_MODE:
1927                 fepriv->tune_mode_flags = (unsigned long) parg;
1928                 err = 0;
1929                 break;
1930         };
1931
1932         if (fe->dvb->fe_ioctl_override) {
1933                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1934                                                     DVB_FE_IOCTL_POST);
1935                 if (cb_err < 0)
1936                         return cb_err;
1937         }
1938
1939         return err;
1940 }
1941
1942
1943 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1944 {
1945         struct dvb_device *dvbdev = file->private_data;
1946         struct dvb_frontend *fe = dvbdev->priv;
1947         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1948
1949         dprintk ("%s\n", __func__);
1950
1951         poll_wait (file, &fepriv->events.wait_queue, wait);
1952
1953         if (fepriv->events.eventw != fepriv->events.eventr)
1954                 return (POLLIN | POLLRDNORM | POLLPRI);
1955
1956         return 0;
1957 }
1958
1959 static int dvb_frontend_open(struct inode *inode, struct file *file)
1960 {
1961         struct dvb_device *dvbdev = file->private_data;
1962         struct dvb_frontend *fe = dvbdev->priv;
1963         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1964         struct dvb_adapter *adapter = fe->dvb;
1965         int ret;
1966
1967         dprintk ("%s\n", __func__);
1968         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
1969                 return -ENODEV;
1970
1971         if (adapter->mfe_shared) {
1972                 mutex_lock (&adapter->mfe_lock);
1973
1974                 if (adapter->mfe_dvbdev == NULL)
1975                         adapter->mfe_dvbdev = dvbdev;
1976
1977                 else if (adapter->mfe_dvbdev != dvbdev) {
1978                         struct dvb_device
1979                                 *mfedev = adapter->mfe_dvbdev;
1980                         struct dvb_frontend
1981                                 *mfe = mfedev->priv;
1982                         struct dvb_frontend_private
1983                                 *mfepriv = mfe->frontend_priv;
1984                         int mferetry = (dvb_mfe_wait_time << 1);
1985
1986                         mutex_unlock (&adapter->mfe_lock);
1987                         while (mferetry-- && (mfedev->users != -1 ||
1988                                         mfepriv->thread != NULL)) {
1989                                 if(msleep_interruptible(500)) {
1990                                         if(signal_pending(current))
1991                                                 return -EINTR;
1992                                 }
1993                         }
1994
1995                         mutex_lock (&adapter->mfe_lock);
1996                         if(adapter->mfe_dvbdev != dvbdev) {
1997                                 mfedev = adapter->mfe_dvbdev;
1998                                 mfe = mfedev->priv;
1999                                 mfepriv = mfe->frontend_priv;
2000                                 if (mfedev->users != -1 ||
2001                                                 mfepriv->thread != NULL) {
2002                                         mutex_unlock (&adapter->mfe_lock);
2003                                         return -EBUSY;
2004                                 }
2005                                 adapter->mfe_dvbdev = dvbdev;
2006                         }
2007                 }
2008         }
2009
2010         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2011                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2012                         goto err0;
2013
2014                 /* If we took control of the bus, we need to force
2015                    reinitialization.  This is because many ts_bus_ctrl()
2016                    functions strobe the RESET pin on the demod, and if the
2017                    frontend thread already exists then the dvb_init() routine
2018                    won't get called (which is what usually does initial
2019                    register configuration). */
2020                 fepriv->reinitialise = 1;
2021         }
2022
2023         if ((ret = dvb_generic_open (inode, file)) < 0)
2024                 goto err1;
2025
2026         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2027                 /* normal tune mode when opened R/W */
2028                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2029                 fepriv->tone = -1;
2030                 fepriv->voltage = -1;
2031
2032                 ret = dvb_frontend_start (fe);
2033                 if (ret)
2034                         goto err2;
2035
2036                 /*  empty event queue */
2037                 fepriv->events.eventr = fepriv->events.eventw = 0;
2038         }
2039
2040         if (adapter->mfe_shared)
2041                 mutex_unlock (&adapter->mfe_lock);
2042         return ret;
2043
2044 err2:
2045         dvb_generic_release(inode, file);
2046 err1:
2047         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2048                 fe->ops.ts_bus_ctrl(fe, 0);
2049 err0:
2050         if (adapter->mfe_shared)
2051                 mutex_unlock (&adapter->mfe_lock);
2052         return ret;
2053 }
2054
2055 static int dvb_frontend_release(struct inode *inode, struct file *file)
2056 {
2057         struct dvb_device *dvbdev = file->private_data;
2058         struct dvb_frontend *fe = dvbdev->priv;
2059         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2060         int ret;
2061
2062         dprintk ("%s\n", __func__);
2063
2064         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
2065                 fepriv->release_jiffies = jiffies;
2066
2067         ret = dvb_generic_release (inode, file);
2068
2069         if (dvbdev->users == -1) {
2070                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2071                         fops_put(file->f_op);
2072                         file->f_op = NULL;
2073                         wake_up(&dvbdev->wait_queue);
2074                 }
2075                 if (fe->ops.ts_bus_ctrl)
2076                         fe->ops.ts_bus_ctrl(fe, 0);
2077         }
2078
2079         return ret;
2080 }
2081
2082 static const struct file_operations dvb_frontend_fops = {
2083         .owner          = THIS_MODULE,
2084         .unlocked_ioctl = dvb_generic_ioctl,
2085         .poll           = dvb_frontend_poll,
2086         .open           = dvb_frontend_open,
2087         .release        = dvb_frontend_release,
2088         .llseek         = noop_llseek,
2089 };
2090
2091 int dvb_register_frontend(struct dvb_adapter* dvb,
2092                           struct dvb_frontend* fe)
2093 {
2094         struct dvb_frontend_private *fepriv;
2095         static const struct dvb_device dvbdev_template = {
2096                 .users = ~0,
2097                 .writers = 1,
2098                 .readers = (~0)-1,
2099                 .fops = &dvb_frontend_fops,
2100                 .kernel_ioctl = dvb_frontend_ioctl
2101         };
2102
2103         dprintk ("%s\n", __func__);
2104
2105         if (mutex_lock_interruptible(&frontend_mutex))
2106                 return -ERESTARTSYS;
2107
2108         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2109         if (fe->frontend_priv == NULL) {
2110                 mutex_unlock(&frontend_mutex);
2111                 return -ENOMEM;
2112         }
2113         fepriv = fe->frontend_priv;
2114
2115         sema_init(&fepriv->sem, 1);
2116         init_waitqueue_head (&fepriv->wait_queue);
2117         init_waitqueue_head (&fepriv->events.wait_queue);
2118         mutex_init(&fepriv->events.mtx);
2119         fe->dvb = dvb;
2120         fepriv->inversion = INVERSION_OFF;
2121
2122         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2123                 fe->dvb->num,
2124                 fe->id,
2125                 fe->ops.info.name);
2126
2127         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2128                              fe, DVB_DEVICE_FRONTEND);
2129
2130         mutex_unlock(&frontend_mutex);
2131         return 0;
2132 }
2133 EXPORT_SYMBOL(dvb_register_frontend);
2134
2135 int dvb_unregister_frontend(struct dvb_frontend* fe)
2136 {
2137         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2138         dprintk ("%s\n", __func__);
2139
2140         mutex_lock(&frontend_mutex);
2141         dvb_frontend_stop (fe);
2142         mutex_unlock(&frontend_mutex);
2143
2144         if (fepriv->dvbdev->users < -1)
2145                 wait_event(fepriv->dvbdev->wait_queue,
2146                                 fepriv->dvbdev->users==-1);
2147
2148         mutex_lock(&frontend_mutex);
2149         dvb_unregister_device (fepriv->dvbdev);
2150
2151         /* fe is invalid now */
2152         kfree(fepriv);
2153         mutex_unlock(&frontend_mutex);
2154         return 0;
2155 }
2156 EXPORT_SYMBOL(dvb_unregister_frontend);
2157
2158 #ifdef CONFIG_MEDIA_ATTACH
2159 void dvb_frontend_detach(struct dvb_frontend* fe)
2160 {
2161         void *ptr;
2162
2163         if (fe->ops.release_sec) {
2164                 fe->ops.release_sec(fe);
2165                 symbol_put_addr(fe->ops.release_sec);
2166         }
2167         if (fe->ops.tuner_ops.release) {
2168                 fe->ops.tuner_ops.release(fe);
2169                 symbol_put_addr(fe->ops.tuner_ops.release);
2170         }
2171         if (fe->ops.analog_ops.release) {
2172                 fe->ops.analog_ops.release(fe);
2173                 symbol_put_addr(fe->ops.analog_ops.release);
2174         }
2175         ptr = (void*)fe->ops.release;
2176         if (ptr) {
2177                 fe->ops.release(fe);
2178                 symbol_put_addr(ptr);
2179         }
2180 }
2181 #else
2182 void dvb_frontend_detach(struct dvb_frontend* fe)
2183 {
2184         if (fe->ops.release_sec)
2185                 fe->ops.release_sec(fe);
2186         if (fe->ops.tuner_ops.release)
2187                 fe->ops.tuner_ops.release(fe);
2188         if (fe->ops.analog_ops.release)
2189                 fe->ops.analog_ops.release(fe);
2190         if (fe->ops.release)
2191                 fe->ops.release(fe);
2192 }
2193 #endif
2194 EXPORT_SYMBOL(dvb_frontend_detach);