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 (mutex_lock_interruptible (&events->mtx))
 153                 return;
 154
 155         wp = (events->eventw + 1) % MAX_EVENT;
 156
 157         if (wp == events->eventr) {
 158                 events->overflow = 1;
 159                 events->eventr = (events->eventr + 1) % MAX_EVENT;
 160         }
 161
 162         e = &events->events[events->eventw];
 163
 164         if (status & FE_HAS_LOCK)
 165                 if (fe->ops.get_frontend)
 166                         fe->ops.get_frontend(fe, &fepriv->parameters_out);
 167
 168         e->parameters = fepriv->parameters_out;
 169
 170         events->eventw = wp;
 171
 172         mutex_unlock(&events->mtx);
 173
 174         e->status = status;
 175
 176         wake_up_interruptible (&events->wait_queue);
 177 }
 178
 179 static int dvb_frontend_get_event(struct dvb_frontend *fe,
 180                             struct dvb_frontend_event *event, int flags)
 181 {
 182         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 183         struct dvb_fe_events *events = &fepriv->events;
 184
 185         dprintk ("%s\n", __func__);
 186
 187         if (events->overflow) {
 188                 events->overflow = 0;
 189                 return -EOVERFLOW;
 190         }
 191
 192         if (events->eventw == events->eventr) {
 193                 int ret;
 194
 195                 if (flags & O_NONBLOCK)
 196                         return -EWOULDBLOCK;
 197
 198                 up(&fepriv->sem);
 199
 200                 ret = wait_event_interruptible (events->wait_queue,
 201                                                 events->eventw != events->eventr);
 202
 203                 if (down_interruptible (&fepriv->sem))
 204                         return -ERESTARTSYS;
 205
 206                 if (ret < 0)
 207                         return ret;
 208         }
 209
 210         if (mutex_lock_interruptible (&events->mtx))
 211                 return -ERESTARTSYS;
 212
 213         memcpy (event, &events->events[events->eventr],
 214                 sizeof(struct dvb_frontend_event));
 215
 216         events->eventr = (events->eventr + 1) % MAX_EVENT;
 217
 218         mutex_unlock(&events->mtx);
 219
 220         return 0;
 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         unsigned long timeout;
 541         fe_status_t s;
 542         enum dvbfe_algo algo;
 543
 544         struct dvb_frontend_parameters *params;
 545
 546         dprintk("%s\n", __func__);
 547
 548         fepriv->check_wrapped = 0;
 549         fepriv->quality = 0;
 550         fepriv->delay = 3*HZ;
 551         fepriv->status = 0;
 552         fepriv->wakeup = 0;
 553         fepriv->reinitialise = 0;
 554
 555         dvb_frontend_init(fe);
 556
 557         set_freezable();
 558         while (1) {
 559                 up(&fepriv->sem);           /* is locked when we enter the thread... */
 560 restart:
 561                 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
 562                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
 563                                 || freezing(current),
 564                         fepriv->delay);
 565
 566                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
 567                         /* got signal or quitting */
 568                         fepriv->exit = DVB_FE_NORMAL_EXIT;
 569                         break;
 570                 }
 571
 572                 if (try_to_freeze())
 573                         goto restart;
 574
 575                 if (down_interruptible(&fepriv->sem))
 576                         break;
 577
 578                 if (fepriv->reinitialise) {
 579                         dvb_frontend_init(fe);
 580                         if (fepriv->tone != -1) {
 581                                 fe->ops.set_tone(fe, fepriv->tone);
 582                         }
 583                         if (fepriv->voltage != -1) {
 584                                 fe->ops.set_voltage(fe, fepriv->voltage);
 585                         }
 586                         fepriv->reinitialise = 0;
 587                 }
 588
 589                 /* do an iteration of the tuning loop */
 590                 if (fe->ops.get_frontend_algo) {
 591                         algo = fe->ops.get_frontend_algo(fe);
 592                         switch (algo) {
 593                         case DVBFE_ALGO_HW:
 594                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
 595                                 params = NULL; /* have we been asked to RETUNE ? */
 596
 597                                 if (fepriv->state & FESTATE_RETUNE) {
 598                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
 599                                         params = &fepriv->parameters_in;
 600                                         fepriv->state = FESTATE_TUNED;
 601                                 }
 602
 603                                 if (fe->ops.tune)
 604                                         fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
 605                                 if (params)
 606                                         fepriv->parameters_out = *params;
 607
 608                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
 609                                         dprintk("%s: state changed, adding current state\n", __func__);
 610                                         dvb_frontend_add_event(fe, s);
 611                                         fepriv->status = s;
 612                                 }
 613                                 break;
 614                         case DVBFE_ALGO_SW:
 615                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
 616                                 dvb_frontend_swzigzag(fe);
 617                                 break;
 618                         case DVBFE_ALGO_CUSTOM:
 619                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
 620                                 if (fepriv->state & FESTATE_RETUNE) {
 621                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
 622                                         fepriv->state = FESTATE_TUNED;
 623                                 }
 624                                 /* Case where we are going to search for a carrier
 625                                  * User asked us to retune again for some reason, possibly
 626                                  * requesting a search with a new set of parameters
 627                                  */
 628                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
 629                                         if (fe->ops.search) {
 630                                                 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters_in);
 631                                                 /* We did do a search as was requested, the flags are
 632                                                  * now unset as well and has the flags wrt to search.
 633                                                  */
 634                                         } else {
 635                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
 636                                         }
 637                                 }
 638                                 /* Track the carrier if the search was successful */
 639                                 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
 640                                         if (fe->ops.track)
 641                                                 fe->ops.track(fe, &fepriv->parameters_in);
 642                                 } else {
 643                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 644                                         fepriv->delay = HZ / 2;
 645                                 }
 646                                 fepriv->parameters_out = fepriv->parameters_in;
 647                                 fe->ops.read_status(fe, &s);
 648                                 if (s != fepriv->status) {
 649                                         dvb_frontend_add_event(fe, s); /* update event list */
 650                                         fepriv->status = s;
 651                                         if (!(s & FE_HAS_LOCK)) {
 652                                                 fepriv->delay = HZ / 10;
 653                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
 654                                         } else {
 655                                                 fepriv->delay = 60 * HZ;
 656                                         }
 657                                 }
 658                                 break;
 659                         default:
 660                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
 661                                 break;
 662                         }
 663                 } else {
 664                         dvb_frontend_swzigzag(fe);
 665                 }
 666         }
 667
 668         if (dvb_powerdown_on_sleep) {
 669                 if (fe->ops.set_voltage)
 670                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
 671                 if (fe->ops.tuner_ops.sleep) {
 672                         if (fe->ops.i2c_gate_ctrl)
 673                                 fe->ops.i2c_gate_ctrl(fe, 1);
 674                         fe->ops.tuner_ops.sleep(fe);
 675                         if (fe->ops.i2c_gate_ctrl)
 676                                 fe->ops.i2c_gate_ctrl(fe, 0);
 677                 }
 678                 if (fe->ops.sleep)
 679                         fe->ops.sleep(fe);
 680         }
 681
 682         fepriv->thread = NULL;
 683         if (kthread_should_stop())
 684                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
 685         else
 686                 fepriv->exit = DVB_FE_NO_EXIT;
 687         mb();
 688
 689         dvb_frontend_wakeup(fe);
 690         return 0;
 691 }
 692
 693 static void dvb_frontend_stop(struct dvb_frontend *fe)
 694 {
 695         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 696
 697         dprintk ("%s\n", __func__);
 698
 699         fepriv->exit = DVB_FE_NORMAL_EXIT;
 700         mb();
 701
 702         if (!fepriv->thread)
 703                 return;
 704
 705         kthread_stop(fepriv->thread);
 706
 707         sema_init(&fepriv->sem, 1);
 708         fepriv->state = FESTATE_IDLE;
 709
 710         /* paranoia check in case a signal arrived */
 711         if (fepriv->thread)
 712                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
 713                                 fepriv->thread);
 714 }
 715
 716 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
 717 {
 718         return ((curtime.tv_usec < lasttime.tv_usec) ?
 719                 1000000 - lasttime.tv_usec + curtime.tv_usec :
 720                 curtime.tv_usec - lasttime.tv_usec);
 721 }
 722 EXPORT_SYMBOL(timeval_usec_diff);
 723
 724 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
 725 {
 726         curtime->tv_usec += add_usec;
 727         if (curtime->tv_usec >= 1000000) {
 728                 curtime->tv_usec -= 1000000;
 729                 curtime->tv_sec++;
 730         }
 731 }
 732
 733 /*
 734  * Sleep until gettimeofday() > waketime + add_usec
 735  * This needs to be as precise as possible, but as the delay is
 736  * usually between 2ms and 32ms, it is done using a scheduled msleep
 737  * followed by usleep (normally a busy-wait loop) for the remainder
 738  */
 739 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
 740 {
 741         struct timeval lasttime;
 742         s32 delta, newdelta;
 743
 744         timeval_usec_add(waketime, add_usec);
 745
 746         do_gettimeofday(&lasttime);
 747         delta = timeval_usec_diff(lasttime, *waketime);
 748         if (delta > 2500) {
 749                 msleep((delta - 1500) / 1000);
 750                 do_gettimeofday(&lasttime);
 751                 newdelta = timeval_usec_diff(lasttime, *waketime);
 752                 delta = (newdelta > delta) ? 0 : newdelta;
 753         }
 754         if (delta > 0)
 755                 udelay(delta);
 756 }
 757 EXPORT_SYMBOL(dvb_frontend_sleep_until);
 758
 759 static int dvb_frontend_start(struct dvb_frontend *fe)
 760 {
 761         int ret;
 762         struct dvb_frontend_private *fepriv = fe->frontend_priv;
 763         struct task_struct *fe_thread;
 764
 765         dprintk ("%s\n", __func__);
 766
 767         if (fepriv->thread) {
 768                 if (fepriv->exit == DVB_FE_NO_EXIT)
 769                         return 0;
 770                 else
 771                         dvb_frontend_stop (fe);
 772         }
 773
 774         if (signal_pending(current))
 775                 return -EINTR;
 776         if (down_interruptible (&fepriv->sem))
 777                 return -EINTR;
 778
 779         fepriv->state = FESTATE_IDLE;
 780         fepriv->exit = DVB_FE_NO_EXIT;
 781         fepriv->thread = NULL;
 782         mb();
 783
 784         fe_thread = kthread_run(dvb_frontend_thread, fe,
 785                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
 786         if (IS_ERR(fe_thread)) {
 787                 ret = PTR_ERR(fe_thread);
 788                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
 789                 up(&fepriv->sem);
 790                 return ret;
 791         }
 792         fepriv->thread = fe_thread;
 793         return 0;
 794 }
 795
 796 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
 797                                         u32 *freq_min, u32 *freq_max)
 798 {
 799         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
 800
 801         if (fe->ops.info.frequency_max == 0)
 802                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
 803         else if (fe->ops.tuner_ops.info.frequency_max == 0)
 804                 *freq_max = fe->ops.info.frequency_max;
 805         else
 806                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
 807
 808         if (*freq_min == 0 || *freq_max == 0)
 809                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
 810                        fe->dvb->num,fe->id);
 811 }
 812
 813 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
 814                                 struct dvb_frontend_parameters *parms)
 815 {
 816         u32 freq_min;
 817         u32 freq_max;
 818
 819         /* range check: frequency */
 820         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
 821         if ((freq_min && parms->frequency < freq_min) ||
 822             (freq_max && parms->frequency > freq_max)) {
 823                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
 824                        fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
 825                 return -EINVAL;
 826         }
 827
 828         /* range check: symbol rate */
 829         if (fe->ops.info.type == FE_QPSK) {
 830                 if ((fe->ops.info.symbol_rate_min &&
 831                      parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
 832                     (fe->ops.info.symbol_rate_max &&
 833                      parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
 834                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 835                                fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
 836                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 837                         return -EINVAL;
 838                 }
 839
 840         } else if (fe->ops.info.type == FE_QAM) {
 841                 if ((fe->ops.info.symbol_rate_min &&
 842                      parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
 843                     (fe->ops.info.symbol_rate_max &&
 844                      parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
 845                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
 846                                fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
 847                                fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
 848                         return -EINVAL;
 849                 }
 850         }
 851
 852         /* check for supported modulation */
 853         if (fe->ops.info.type == FE_QAM &&
 854             (parms->u.qam.modulation > QAM_AUTO ||
 855              !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
 856                 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
 857                        fe->dvb->num, fe->id, parms->u.qam.modulation);
 858                         return -EINVAL;
 859         }
 860
 861         return 0;
 862 }
 863
 864 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
 865 {
 866         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 867         int i;
 868
 869         memset(c, 0, sizeof(struct dtv_frontend_properties));
 870
 871         c->state = DTV_CLEAR;
 872         c->delivery_system = SYS_UNDEFINED;
 873         c->inversion = INVERSION_AUTO;
 874         c->fec_inner = FEC_AUTO;
 875         c->transmission_mode = TRANSMISSION_MODE_AUTO;
 876         c->bandwidth_hz = BANDWIDTH_AUTO;
 877         c->guard_interval = GUARD_INTERVAL_AUTO;
 878         c->hierarchy = HIERARCHY_AUTO;
 879         c->symbol_rate = QAM_AUTO;
 880         c->code_rate_HP = FEC_AUTO;
 881         c->code_rate_LP = FEC_AUTO;
 882
 883         c->isdbt_partial_reception = -1;
 884         c->isdbt_sb_mode = -1;
 885         c->isdbt_sb_subchannel = -1;
 886         c->isdbt_sb_segment_idx = -1;
 887         c->isdbt_sb_segment_count = -1;
 888         c->isdbt_layer_enabled = 0x7;
 889         for (i = 0; i < 3; i++) {
 890                 c->layer[i].fec = FEC_AUTO;
 891                 c->layer[i].modulation = QAM_AUTO;
 892                 c->layer[i].interleaving = -1;
 893                 c->layer[i].segment_count = -1;
 894         }
 895
 896         return 0;
 897 }
 898
 899 #define _DTV_CMD(n, s, b) \
 900 [n] = { \
 901         .name = #n, \
 902         .cmd  = n, \
 903         .set  = s,\
 904         .buffer = b \
 905 }
 906
 907 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
 908         _DTV_CMD(DTV_TUNE, 1, 0),
 909         _DTV_CMD(DTV_CLEAR, 1, 0),
 910
 911         /* Set */
 912         _DTV_CMD(DTV_FREQUENCY, 1, 0),
 913         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
 914         _DTV_CMD(DTV_MODULATION, 1, 0),
 915         _DTV_CMD(DTV_INVERSION, 1, 0),
 916         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
 917         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
 918         _DTV_CMD(DTV_INNER_FEC, 1, 0),
 919         _DTV_CMD(DTV_VOLTAGE, 1, 0),
 920         _DTV_CMD(DTV_TONE, 1, 0),
 921         _DTV_CMD(DTV_PILOT, 1, 0),
 922         _DTV_CMD(DTV_ROLLOFF, 1, 0),
 923         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
 924         _DTV_CMD(DTV_HIERARCHY, 1, 0),
 925         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
 926         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
 927         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
 928         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
 929
 930         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
 931         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
 932         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
 933         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
 934         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
 935         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
 936         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
 937         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
 938         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
 939         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
 940         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
 941         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
 942         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
 943         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
 944         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
 945         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
 946         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
 947         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
 948
 949         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
 950         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
 951         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
 952         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
 953         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
 954         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
 955         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
 956         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
 957         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
 958         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
 959         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
 960         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
 961         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
 962         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
 963         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
 964         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
 965         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
 966         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
 967
 968         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
 969         _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
 970
 971         /* Get */
 972         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
 973         _DTV_CMD(DTV_API_VERSION, 0, 0),
 974         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
 975         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
 976         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
 977         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
 978         _DTV_CMD(DTV_HIERARCHY, 0, 0),
 979 };
 980
 981 static void dtv_property_dump(struct dtv_property *tvp)
 982 {
 983         int i;
 984
 985         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
 986                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
 987                         __func__, tvp->cmd);
 988                 return;
 989         }
 990
 991         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
 992                 ,__func__
 993                 ,tvp->cmd
 994                 ,dtv_cmds[ tvp->cmd ].name);
 995
 996         if(dtv_cmds[ tvp->cmd ].buffer) {
 997
 998                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
 999                         ,__func__
1000                         ,tvp->u.buffer.len);
1001
1002                 for(i = 0; i < tvp->u.buffer.len; i++)
1003                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1004                                 ,__func__
1005                                 ,i
1006                                 ,tvp->u.buffer.data[i]);
1007
1008         } else
1009                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1010 }
1011
1012 static int is_legacy_delivery_system(fe_delivery_system_t s)
1013 {
1014         if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1015            (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1016            (s == SYS_ATSC))
1017                 return 1;
1018
1019         return 0;
1020 }
1021
1022 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1023  * drivers can use a single set_frontend tuning function, regardless of whether
1024  * it's being used for the legacy or new API, reducing code and complexity.
1025  */
1026 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1027                                     struct dtv_frontend_properties *c,
1028                                     const struct dvb_frontend_parameters *p)
1029 {
1030         c->frequency = p->frequency;
1031         c->inversion = p->inversion;
1032
1033         switch (fe->ops.info.type) {
1034         case FE_QPSK:
1035                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
1036                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1037                 c->symbol_rate = p->u.qpsk.symbol_rate;
1038                 c->fec_inner = p->u.qpsk.fec_inner;
1039                 c->delivery_system = SYS_DVBS;
1040                 break;
1041         case FE_QAM:
1042                 c->symbol_rate = p->u.qam.symbol_rate;
1043                 c->fec_inner = p->u.qam.fec_inner;
1044                 c->modulation = p->u.qam.modulation;
1045                 c->delivery_system = SYS_DVBC_ANNEX_AC;
1046                 break;
1047         case FE_OFDM:
1048                 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1049                         c->bandwidth_hz = 6000000;
1050                 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1051                         c->bandwidth_hz = 7000000;
1052                 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1053                         c->bandwidth_hz = 8000000;
1054                 else
1055                         /* Including BANDWIDTH_AUTO */
1056                         c->bandwidth_hz = 0;
1057                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1058                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1059                 c->modulation = p->u.ofdm.constellation;
1060                 c->transmission_mode = p->u.ofdm.transmission_mode;
1061                 c->guard_interval = p->u.ofdm.guard_interval;
1062                 c->hierarchy = p->u.ofdm.hierarchy_information;
1063                 c->delivery_system = SYS_DVBT;
1064                 break;
1065         case FE_ATSC:
1066                 c->modulation = p->u.vsb.modulation;
1067                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1068                         c->delivery_system = SYS_ATSC;
1069                 else
1070                         c->delivery_system = SYS_DVBC_ANNEX_B;
1071                 break;
1072         }
1073 }
1074
1075 /* Ensure the cached values are set correctly in the frontend
1076  * legacy tuning structures, for the advanced tuning API.
1077  */
1078 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1079 {
1080         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1081         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1082         struct dvb_frontend_parameters *p = &fepriv->parameters_in;
1083
1084         p->frequency = c->frequency;
1085         p->inversion = c->inversion;
1086
1087         switch (fe->ops.info.type) {
1088         case FE_QPSK:
1089                 dprintk("%s() Preparing QPSK req\n", __func__);
1090                 p->u.qpsk.symbol_rate = c->symbol_rate;
1091                 p->u.qpsk.fec_inner = c->fec_inner;
1092                 break;
1093         case FE_QAM:
1094                 dprintk("%s() Preparing QAM req\n", __func__);
1095                 p->u.qam.symbol_rate = c->symbol_rate;
1096                 p->u.qam.fec_inner = c->fec_inner;
1097                 p->u.qam.modulation = c->modulation;
1098                 break;
1099         case FE_OFDM:
1100                 dprintk("%s() Preparing OFDM req\n", __func__);
1101                 if (c->bandwidth_hz == 6000000)
1102                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1103                 else if (c->bandwidth_hz == 7000000)
1104                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1105                 else if (c->bandwidth_hz == 8000000)
1106                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1107                 else
1108                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1109                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1110                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1111                 p->u.ofdm.constellation = c->modulation;
1112                 p->u.ofdm.transmission_mode = c->transmission_mode;
1113                 p->u.ofdm.guard_interval = c->guard_interval;
1114                 p->u.ofdm.hierarchy_information = c->hierarchy;
1115                 break;
1116         case FE_ATSC:
1117                 dprintk("%s() Preparing VSB req\n", __func__);
1118                 p->u.vsb.modulation = c->modulation;
1119                 break;
1120         }
1121 }
1122
1123 /* Ensure the cached values are set correctly in the frontend
1124  * legacy tuning structures, for the legacy tuning API.
1125  */
1126 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1127 {
1128         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1129         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1130         struct dvb_frontend_parameters *p = &fepriv->parameters_in;
1131
1132         p->frequency = c->frequency;
1133         p->inversion = c->inversion;
1134
1135         switch(c->modulation) {
1136         case PSK_8:
1137         case APSK_16:
1138         case APSK_32:
1139         case QPSK:
1140                 p->u.qpsk.symbol_rate = c->symbol_rate;
1141                 p->u.qpsk.fec_inner = c->fec_inner;
1142                 break;
1143         default:
1144                 break;
1145         }
1146
1147         /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1148         if ((c->delivery_system == SYS_ISDBT) ||
1149             (c->delivery_system == SYS_DVBT2)) {
1150                 p->u.ofdm.constellation = QAM_AUTO;
1151                 p->u.ofdm.code_rate_HP = FEC_AUTO;
1152                 p->u.ofdm.code_rate_LP = FEC_AUTO;
1153                 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1154                 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1155                 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1156                 if (c->bandwidth_hz == 8000000)
1157                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1158                 else if (c->bandwidth_hz == 7000000)
1159                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1160                 else if (c->bandwidth_hz == 6000000)
1161                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1162                 else
1163                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1164         }
1165 }
1166
1167 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1168 {
1169         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1170
1171         /* For legacy delivery systems we don't need the delivery_system to
1172          * be specified, but we populate the older structures from the cache
1173          * so we can call set_frontend on older drivers.
1174          */
1175         if(is_legacy_delivery_system(c->delivery_system)) {
1176
1177                 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1178                 dtv_property_legacy_params_sync(fe);
1179
1180         } else {
1181                 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1182
1183                 /* For advanced delivery systems / modulation types ...
1184                  * we seed the lecacy dvb_frontend_parameters structure
1185                  * so that the sanity checking code later in the IOCTL processing
1186                  * can validate our basic frequency ranges, symbolrates, modulation
1187                  * etc.
1188                  */
1189                 dtv_property_adv_params_sync(fe);
1190         }
1191 }
1192
1193 static int dvb_frontend_ioctl_legacy(struct file *file,
1194                         unsigned int cmd, void *parg);
1195 static int dvb_frontend_ioctl_properties(struct file *file,
1196                         unsigned int cmd, void *parg);
1197
1198 static int dtv_property_process_get(struct dvb_frontend *fe,
1199                                     struct dtv_property *tvp,
1200                                     struct file *file)
1201 {
1202         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1203         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1204         struct dtv_frontend_properties cdetected;
1205         int r;
1206
1207         /*
1208          * If the driver implements a get_frontend function, then convert
1209          * detected parameters to S2API properties.
1210          */
1211         if (fe->ops.get_frontend) {
1212                 cdetected = *c;
1213                 dtv_property_cache_sync(fe, &cdetected, &fepriv->parameters_out);
1214                 c = &cdetected;
1215         }
1216
1217         switch(tvp->cmd) {
1218         case DTV_FREQUENCY:
1219                 tvp->u.data = c->frequency;
1220                 break;
1221         case DTV_MODULATION:
1222                 tvp->u.data = c->modulation;
1223                 break;
1224         case DTV_BANDWIDTH_HZ:
1225                 tvp->u.data = c->bandwidth_hz;
1226                 break;
1227         case DTV_INVERSION:
1228                 tvp->u.data = c->inversion;
1229                 break;
1230         case DTV_SYMBOL_RATE:
1231                 tvp->u.data = c->symbol_rate;
1232                 break;
1233         case DTV_INNER_FEC:
1234                 tvp->u.data = c->fec_inner;
1235                 break;
1236         case DTV_PILOT:
1237                 tvp->u.data = c->pilot;
1238                 break;
1239         case DTV_ROLLOFF:
1240                 tvp->u.data = c->rolloff;
1241                 break;
1242         case DTV_DELIVERY_SYSTEM:
1243                 tvp->u.data = c->delivery_system;
1244                 break;
1245         case DTV_VOLTAGE:
1246                 tvp->u.data = c->voltage;
1247                 break;
1248         case DTV_TONE:
1249                 tvp->u.data = c->sectone;
1250                 break;
1251         case DTV_API_VERSION:
1252                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1253                 break;
1254         case DTV_CODE_RATE_HP:
1255                 tvp->u.data = c->code_rate_HP;
1256                 break;
1257         case DTV_CODE_RATE_LP:
1258                 tvp->u.data = c->code_rate_LP;
1259                 break;
1260         case DTV_GUARD_INTERVAL:
1261                 tvp->u.data = c->guard_interval;
1262                 break;
1263         case DTV_TRANSMISSION_MODE:
1264                 tvp->u.data = c->transmission_mode;
1265                 break;
1266         case DTV_HIERARCHY:
1267                 tvp->u.data = c->hierarchy;
1268                 break;
1269
1270         /* ISDB-T Support here */
1271         case DTV_ISDBT_PARTIAL_RECEPTION:
1272                 tvp->u.data = c->isdbt_partial_reception;
1273                 break;
1274         case DTV_ISDBT_SOUND_BROADCASTING:
1275                 tvp->u.data = c->isdbt_sb_mode;
1276                 break;
1277         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1278                 tvp->u.data = c->isdbt_sb_subchannel;
1279                 break;
1280         case DTV_ISDBT_SB_SEGMENT_IDX:
1281                 tvp->u.data = c->isdbt_sb_segment_idx;
1282                 break;
1283         case DTV_ISDBT_SB_SEGMENT_COUNT:
1284                 tvp->u.data = c->isdbt_sb_segment_count;
1285                 break;
1286         case DTV_ISDBT_LAYER_ENABLED:
1287                 tvp->u.data = c->isdbt_layer_enabled;
1288                 break;
1289         case DTV_ISDBT_LAYERA_FEC:
1290                 tvp->u.data = c->layer[0].fec;
1291                 break;
1292         case DTV_ISDBT_LAYERA_MODULATION:
1293                 tvp->u.data = c->layer[0].modulation;
1294                 break;
1295         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1296                 tvp->u.data = c->layer[0].segment_count;
1297                 break;
1298         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1299                 tvp->u.data = c->layer[0].interleaving;
1300                 break;
1301         case DTV_ISDBT_LAYERB_FEC:
1302                 tvp->u.data = c->layer[1].fec;
1303                 break;
1304         case DTV_ISDBT_LAYERB_MODULATION:
1305                 tvp->u.data = c->layer[1].modulation;
1306                 break;
1307         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1308                 tvp->u.data = c->layer[1].segment_count;
1309                 break;
1310         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1311                 tvp->u.data = c->layer[1].interleaving;
1312                 break;
1313         case DTV_ISDBT_LAYERC_FEC:
1314                 tvp->u.data = c->layer[2].fec;
1315                 break;
1316         case DTV_ISDBT_LAYERC_MODULATION:
1317                 tvp->u.data = c->layer[2].modulation;
1318                 break;
1319         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1320                 tvp->u.data = c->layer[2].segment_count;
1321                 break;
1322         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1323                 tvp->u.data = c->layer[2].interleaving;
1324                 break;
1325         case DTV_ISDBS_TS_ID:
1326                 tvp->u.data = c->isdbs_ts_id;
1327                 break;
1328         case DTV_DVBT2_PLP_ID:
1329                 tvp->u.data = c->dvbt2_plp_id;
1330                 break;
1331         default:
1332                 return -EINVAL;
1333         }
1334
1335         /* Allow the frontend to override outgoing properties */
1336         if (fe->ops.get_property) {
1337                 r = fe->ops.get_property(fe, tvp);
1338                 if (r < 0)
1339                         return r;
1340         }
1341
1342         dtv_property_dump(tvp);
1343
1344         return 0;
1345 }
1346
1347 static int dtv_property_process_set(struct dvb_frontend *fe,
1348                                     struct dtv_property *tvp,
1349                                     struct file *file)
1350 {
1351         int r = 0;
1352         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1353         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1354         dtv_property_dump(tvp);
1355
1356         /* Allow the frontend to validate incoming properties */
1357         if (fe->ops.set_property) {
1358                 r = fe->ops.set_property(fe, tvp);
1359                 if (r < 0)
1360                         return r;
1361         }
1362
1363         switch(tvp->cmd) {
1364         case DTV_CLEAR:
1365                 /* Reset a cache of data specific to the frontend here. This does
1366                  * not effect hardware.
1367                  */
1368                 dvb_frontend_clear_cache(fe);
1369                 dprintk("%s() Flushing property cache\n", __func__);
1370                 break;
1371         case DTV_TUNE:
1372                 /* interpret the cache of data, build either a traditional frontend
1373                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1374                  * ioctl.
1375                  */
1376                 c->state = tvp->cmd;
1377                 dprintk("%s() Finalised property cache\n", __func__);
1378                 dtv_property_cache_submit(fe);
1379
1380                 r = dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND,
1381                         &fepriv->parameters_in);
1382                 break;
1383         case DTV_FREQUENCY:
1384                 c->frequency = tvp->u.data;
1385                 break;
1386         case DTV_MODULATION:
1387                 c->modulation = tvp->u.data;
1388                 break;
1389         case DTV_BANDWIDTH_HZ:
1390                 c->bandwidth_hz = tvp->u.data;
1391                 break;
1392         case DTV_INVERSION:
1393                 c->inversion = tvp->u.data;
1394                 break;
1395         case DTV_SYMBOL_RATE:
1396                 c->symbol_rate = tvp->u.data;
1397                 break;
1398         case DTV_INNER_FEC:
1399                 c->fec_inner = tvp->u.data;
1400                 break;
1401         case DTV_PILOT:
1402                 c->pilot = tvp->u.data;
1403                 break;
1404         case DTV_ROLLOFF:
1405                 c->rolloff = tvp->u.data;
1406                 break;
1407         case DTV_DELIVERY_SYSTEM:
1408                 c->delivery_system = tvp->u.data;
1409                 break;
1410         case DTV_VOLTAGE:
1411                 c->voltage = tvp->u.data;
1412                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1413                         (void *)c->voltage);
1414                 break;
1415         case DTV_TONE:
1416                 c->sectone = tvp->u.data;
1417                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1418                         (void *)c->sectone);
1419                 break;
1420         case DTV_CODE_RATE_HP:
1421                 c->code_rate_HP = tvp->u.data;
1422                 break;
1423         case DTV_CODE_RATE_LP:
1424                 c->code_rate_LP = tvp->u.data;
1425                 break;
1426         case DTV_GUARD_INTERVAL:
1427                 c->guard_interval = tvp->u.data;
1428                 break;
1429         case DTV_TRANSMISSION_MODE:
1430                 c->transmission_mode = tvp->u.data;
1431                 break;
1432         case DTV_HIERARCHY:
1433                 c->hierarchy = tvp->u.data;
1434                 break;
1435
1436         /* ISDB-T Support here */
1437         case DTV_ISDBT_PARTIAL_RECEPTION:
1438                 c->isdbt_partial_reception = tvp->u.data;
1439                 break;
1440         case DTV_ISDBT_SOUND_BROADCASTING:
1441                 c->isdbt_sb_mode = tvp->u.data;
1442                 break;
1443         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1444                 c->isdbt_sb_subchannel = tvp->u.data;
1445                 break;
1446         case DTV_ISDBT_SB_SEGMENT_IDX:
1447                 c->isdbt_sb_segment_idx = tvp->u.data;
1448                 break;
1449         case DTV_ISDBT_SB_SEGMENT_COUNT:
1450                 c->isdbt_sb_segment_count = tvp->u.data;
1451                 break;
1452         case DTV_ISDBT_LAYER_ENABLED:
1453                 c->isdbt_layer_enabled = tvp->u.data;
1454                 break;
1455         case DTV_ISDBT_LAYERA_FEC:
1456                 c->layer[0].fec = tvp->u.data;
1457                 break;
1458         case DTV_ISDBT_LAYERA_MODULATION:
1459                 c->layer[0].modulation = tvp->u.data;
1460                 break;
1461         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1462                 c->layer[0].segment_count = tvp->u.data;
1463                 break;
1464         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1465                 c->layer[0].interleaving = tvp->u.data;
1466                 break;
1467         case DTV_ISDBT_LAYERB_FEC:
1468                 c->layer[1].fec = tvp->u.data;
1469                 break;
1470         case DTV_ISDBT_LAYERB_MODULATION:
1471                 c->layer[1].modulation = tvp->u.data;
1472                 break;
1473         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1474                 c->layer[1].segment_count = tvp->u.data;
1475                 break;
1476         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1477                 c->layer[1].interleaving = tvp->u.data;
1478                 break;
1479         case DTV_ISDBT_LAYERC_FEC:
1480                 c->layer[2].fec = tvp->u.data;
1481                 break;
1482         case DTV_ISDBT_LAYERC_MODULATION:
1483                 c->layer[2].modulation = tvp->u.data;
1484                 break;
1485         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1486                 c->layer[2].segment_count = tvp->u.data;
1487                 break;
1488         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1489                 c->layer[2].interleaving = tvp->u.data;
1490                 break;
1491         case DTV_ISDBS_TS_ID:
1492                 c->isdbs_ts_id = tvp->u.data;
1493                 break;
1494         case DTV_DVBT2_PLP_ID:
1495                 c->dvbt2_plp_id = tvp->u.data;
1496                 break;
1497         default:
1498                 return -EINVAL;
1499         }
1500
1501         return r;
1502 }
1503
1504 static int dvb_frontend_ioctl(struct file *file,
1505                         unsigned int cmd, void *parg)
1506 {
1507         struct dvb_device *dvbdev = file->private_data;
1508         struct dvb_frontend *fe = dvbdev->priv;
1509         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1510         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1511         int err = -EOPNOTSUPP;
1512
1513         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1514
1515         if (fepriv->exit != DVB_FE_NO_EXIT)
1516                 return -ENODEV;
1517
1518         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1519             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1520              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1521                 return -EPERM;
1522
1523         if (down_interruptible (&fepriv->sem))
1524                 return -ERESTARTSYS;
1525
1526         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1527                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1528         else {
1529                 c->state = DTV_UNDEFINED;
1530                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1531         }
1532
1533         up(&fepriv->sem);
1534         return err;
1535 }
1536
1537 static int dvb_frontend_ioctl_properties(struct file *file,
1538                         unsigned int cmd, void *parg)
1539 {
1540         struct dvb_device *dvbdev = file->private_data;
1541         struct dvb_frontend *fe = dvbdev->priv;
1542         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1543         int err = 0;
1544
1545         struct dtv_properties *tvps = NULL;
1546         struct dtv_property *tvp = NULL;
1547         int i;
1548
1549         dprintk("%s\n", __func__);
1550
1551         if(cmd == FE_SET_PROPERTY) {
1552                 tvps = (struct dtv_properties __user *)parg;
1553
1554                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1555                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1556
1557                 /* Put an arbitrary limit on the number of messages that can
1558                  * be sent at once */
1559                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1560                         return -EINVAL;
1561
1562                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1563                 if (!tvp) {
1564                         err = -ENOMEM;
1565                         goto out;
1566                 }
1567
1568                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1569                         err = -EFAULT;
1570                         goto out;
1571                 }
1572
1573                 for (i = 0; i < tvps->num; i++) {
1574                         err = dtv_property_process_set(fe, tvp + i, file);
1575                         if (err < 0)
1576                                 goto out;
1577                         (tvp + i)->result = err;
1578                 }
1579
1580                 if (c->state == DTV_TUNE)
1581                         dprintk("%s() Property cache is full, tuning\n", __func__);
1582
1583         } else
1584         if(cmd == FE_GET_PROPERTY) {
1585
1586                 tvps = (struct dtv_properties __user *)parg;
1587
1588                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1589                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1590
1591                 /* Put an arbitrary limit on the number of messages that can
1592                  * be sent at once */
1593                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1594                         return -EINVAL;
1595
1596                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1597                 if (!tvp) {
1598                         err = -ENOMEM;
1599                         goto out;
1600                 }
1601
1602                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1603                         err = -EFAULT;
1604                         goto out;
1605                 }
1606
1607                 for (i = 0; i < tvps->num; i++) {
1608                         err = dtv_property_process_get(fe, tvp + i, file);
1609                         if (err < 0)
1610                                 goto out;
1611                         (tvp + i)->result = err;
1612                 }
1613
1614                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1615                         err = -EFAULT;
1616                         goto out;
1617                 }
1618
1619         } else
1620                 err = -EOPNOTSUPP;
1621
1622 out:
1623         kfree(tvp);
1624         return err;
1625 }
1626
1627 static int dvb_frontend_ioctl_legacy(struct file *file,
1628                         unsigned int cmd, void *parg)
1629 {
1630         struct dvb_device *dvbdev = file->private_data;
1631         struct dvb_frontend *fe = dvbdev->priv;
1632         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1633         int cb_err, err = -EOPNOTSUPP;
1634
1635         if (fe->dvb->fe_ioctl_override) {
1636                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1637                                                     DVB_FE_IOCTL_PRE);
1638                 if (cb_err < 0)
1639                         return cb_err;
1640                 if (cb_err > 0)
1641                         return 0;
1642                 /* fe_ioctl_override returning 0 allows
1643                  * dvb-core to continue handling the ioctl */
1644         }
1645
1646         switch (cmd) {
1647         case FE_GET_INFO: {
1648                 struct dvb_frontend_info* info = parg;
1649                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1650                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1651
1652                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1653                  * do it, it is done for it. */
1654                 info->caps |= FE_CAN_INVERSION_AUTO;
1655                 err = 0;
1656                 break;
1657         }
1658
1659         case FE_READ_STATUS: {
1660                 fe_status_t* status = parg;
1661
1662                 /* if retune was requested but hasn't occurred yet, prevent
1663                  * that user get signal state from previous tuning */
1664                 if (fepriv->state == FESTATE_RETUNE ||
1665                     fepriv->state == FESTATE_ERROR) {
1666                         err=0;
1667                         *status = 0;
1668                         break;
1669                 }
1670
1671                 if (fe->ops.read_status)
1672                         err = fe->ops.read_status(fe, status);
1673                 break;
1674         }
1675         case FE_READ_BER:
1676                 if (fe->ops.read_ber)
1677                         err = fe->ops.read_ber(fe, (__u32*) parg);
1678                 break;
1679
1680         case FE_READ_SIGNAL_STRENGTH:
1681                 if (fe->ops.read_signal_strength)
1682                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1683                 break;
1684
1685         case FE_READ_SNR:
1686                 if (fe->ops.read_snr)
1687                         err = fe->ops.read_snr(fe, (__u16*) parg);
1688                 break;
1689
1690         case FE_READ_UNCORRECTED_BLOCKS:
1691                 if (fe->ops.read_ucblocks)
1692                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1693                 break;
1694
1695
1696         case FE_DISEQC_RESET_OVERLOAD:
1697                 if (fe->ops.diseqc_reset_overload) {
1698                         err = fe->ops.diseqc_reset_overload(fe);
1699                         fepriv->state = FESTATE_DISEQC;
1700                         fepriv->status = 0;
1701                 }
1702                 break;
1703
1704         case FE_DISEQC_SEND_MASTER_CMD:
1705                 if (fe->ops.diseqc_send_master_cmd) {
1706                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1707                         fepriv->state = FESTATE_DISEQC;
1708                         fepriv->status = 0;
1709                 }
1710                 break;
1711
1712         case FE_DISEQC_SEND_BURST:
1713                 if (fe->ops.diseqc_send_burst) {
1714                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1715                         fepriv->state = FESTATE_DISEQC;
1716                         fepriv->status = 0;
1717                 }
1718                 break;
1719
1720         case FE_SET_TONE:
1721                 if (fe->ops.set_tone) {
1722                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1723                         fepriv->tone = (fe_sec_tone_mode_t) parg;
1724                         fepriv->state = FESTATE_DISEQC;
1725                         fepriv->status = 0;
1726                 }
1727                 break;
1728
1729         case FE_SET_VOLTAGE:
1730                 if (fe->ops.set_voltage) {
1731                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1732                         fepriv->voltage = (fe_sec_voltage_t) parg;
1733                         fepriv->state = FESTATE_DISEQC;
1734                         fepriv->status = 0;
1735                 }
1736                 break;
1737
1738         case FE_DISHNETWORK_SEND_LEGACY_CMD:
1739                 if (fe->ops.dishnetwork_send_legacy_command) {
1740                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1741                         fepriv->state = FESTATE_DISEQC;
1742                         fepriv->status = 0;
1743                 } else if (fe->ops.set_voltage) {
1744                         /*
1745                          * NOTE: This is a fallback condition.  Some frontends
1746                          * (stv0299 for instance) take longer than 8msec to
1747                          * respond to a set_voltage command.  Those switches
1748                          * need custom routines to switch properly.  For all
1749                          * other frontends, the following should work ok.
1750                          * Dish network legacy switches (as used by Dish500)
1751                          * are controlled by sending 9-bit command words
1752                          * spaced 8msec apart.
1753                          * the actual command word is switch/port dependent
1754                          * so it is up to the userspace application to send
1755                          * the right command.
1756                          * The command must always start with a '0' after
1757                          * initialization, so parg is 8 bits and does not
1758                          * include the initialization or start bit
1759                          */
1760                         unsigned long swcmd = ((unsigned long) parg) << 1;
1761                         struct timeval nexttime;
1762                         struct timeval tv[10];
1763                         int i;
1764                         u8 last = 1;
1765                         if (dvb_frontend_debug)
1766                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1767                         do_gettimeofday(&nexttime);
1768                         if (dvb_frontend_debug)
1769                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1770                         /* before sending a command, initialize by sending
1771                          * a 32ms 18V to the switch
1772                          */
1773                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1774                         dvb_frontend_sleep_until(&nexttime, 32000);
1775
1776                         for (i = 0; i < 9; i++) {
1777                                 if (dvb_frontend_debug)
1778                                         do_gettimeofday(&tv[i + 1]);
1779                                 if ((swcmd & 0x01) != last) {
1780                                         /* set voltage to (last ? 13V : 18V) */
1781                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1782                                         last = (last) ? 0 : 1;
1783                                 }
1784                                 swcmd = swcmd >> 1;
1785                                 if (i != 8)
1786                                         dvb_frontend_sleep_until(&nexttime, 8000);
1787                         }
1788                         if (dvb_frontend_debug) {
1789                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1790                                         __func__, fe->dvb->num);
1791                                 for (i = 1; i < 10; i++)
1792                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1793                         }
1794                         err = 0;
1795                         fepriv->state = FESTATE_DISEQC;
1796                         fepriv->status = 0;
1797                 }
1798                 break;
1799
1800         case FE_DISEQC_RECV_SLAVE_REPLY:
1801                 if (fe->ops.diseqc_recv_slave_reply)
1802                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1803                 break;
1804
1805         case FE_ENABLE_HIGH_LNB_VOLTAGE:
1806                 if (fe->ops.enable_high_lnb_voltage)
1807                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1808                 break;
1809
1810         case FE_SET_FRONTEND: {
1811                 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1812                 struct dvb_frontend_tune_settings fetunesettings;
1813
1814                 if (c->state == DTV_TUNE) {
1815                         if (dvb_frontend_check_parameters(fe, &fepriv->parameters_in) < 0) {
1816                                 err = -EINVAL;
1817                                 break;
1818                         }
1819                 } else {
1820                         if (dvb_frontend_check_parameters(fe, parg) < 0) {
1821                                 err = -EINVAL;
1822                                 break;
1823                         }
1824
1825                         memcpy (&fepriv->parameters_in, parg,
1826                                 sizeof (struct dvb_frontend_parameters));
1827                         dtv_property_cache_sync(fe, c, &fepriv->parameters_in);
1828                 }
1829
1830                 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1831                 memcpy(&fetunesettings.parameters, parg,
1832                        sizeof (struct dvb_frontend_parameters));
1833
1834                 /* force auto frequency inversion if requested */
1835                 if (dvb_force_auto_inversion) {
1836                         fepriv->parameters_in.inversion = INVERSION_AUTO;
1837                         fetunesettings.parameters.inversion = INVERSION_AUTO;
1838                 }
1839                 if (fe->ops.info.type == FE_OFDM) {
1840                         /* without hierarchical coding code_rate_LP is irrelevant,
1841                          * so we tolerate the otherwise invalid FEC_NONE setting */
1842                         if (fepriv->parameters_in.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1843                             fepriv->parameters_in.u.ofdm.code_rate_LP == FEC_NONE)
1844                                 fepriv->parameters_in.u.ofdm.code_rate_LP = FEC_AUTO;
1845                 }
1846
1847                 /* get frontend-specific tuning settings */
1848                 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1849                         fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1850                         fepriv->max_drift = fetunesettings.max_drift;
1851                         fepriv->step_size = fetunesettings.step_size;
1852                 } else {
1853                         /* default values */
1854                         switch(fe->ops.info.type) {
1855                         case FE_QPSK:
1856                                 fepriv->min_delay = HZ/20;
1857                                 fepriv->step_size = fepriv->parameters_in.u.qpsk.symbol_rate / 16000;
1858                                 fepriv->max_drift = fepriv->parameters_in.u.qpsk.symbol_rate / 2000;
1859                                 break;
1860
1861                         case FE_QAM:
1862                                 fepriv->min_delay = HZ/20;
1863                                 fepriv->step_size = 0; /* no zigzag */
1864                                 fepriv->max_drift = 0;
1865                                 break;
1866
1867                         case FE_OFDM:
1868                                 fepriv->min_delay = HZ/20;
1869                                 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1870                                 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1871                                 break;
1872                         case FE_ATSC:
1873                                 fepriv->min_delay = HZ/20;
1874                                 fepriv->step_size = 0;
1875                                 fepriv->max_drift = 0;
1876                                 break;
1877                         }
1878                 }
1879                 if (dvb_override_tune_delay > 0)
1880                         fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1881
1882                 fepriv->state = FESTATE_RETUNE;
1883
1884                 /* Request the search algorithm to search */
1885                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1886
1887                 dvb_frontend_wakeup(fe);
1888                 dvb_frontend_add_event(fe, 0);
1889                 fepriv->status = 0;
1890                 err = 0;
1891                 break;
1892         }
1893
1894         case FE_GET_EVENT:
1895                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1896                 break;
1897
1898         case FE_GET_FRONTEND:
1899                 if (fe->ops.get_frontend) {
1900                         err = fe->ops.get_frontend(fe, &fepriv->parameters_out);
1901                         memcpy(parg, &fepriv->parameters_out, sizeof(struct dvb_frontend_parameters));
1902                 }
1903                 break;
1904
1905         case FE_SET_FRONTEND_TUNE_MODE:
1906                 fepriv->tune_mode_flags = (unsigned long) parg;
1907                 err = 0;
1908                 break;
1909         };
1910
1911         if (fe->dvb->fe_ioctl_override) {
1912                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1913                                                     DVB_FE_IOCTL_POST);
1914                 if (cb_err < 0)
1915                         return cb_err;
1916         }
1917
1918         return err;
1919 }
1920
1921
1922 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1923 {
1924         struct dvb_device *dvbdev = file->private_data;
1925         struct dvb_frontend *fe = dvbdev->priv;
1926         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1927
1928         dprintk ("%s\n", __func__);
1929
1930         poll_wait (file, &fepriv->events.wait_queue, wait);
1931
1932         if (fepriv->events.eventw != fepriv->events.eventr)
1933                 return (POLLIN | POLLRDNORM | POLLPRI);
1934
1935         return 0;
1936 }
1937
1938 static int dvb_frontend_open(struct inode *inode, struct file *file)
1939 {
1940         struct dvb_device *dvbdev = file->private_data;
1941         struct dvb_frontend *fe = dvbdev->priv;
1942         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1943         struct dvb_adapter *adapter = fe->dvb;
1944         int ret;
1945
1946         dprintk ("%s\n", __func__);
1947         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
1948                 return -ENODEV;
1949
1950         if (adapter->mfe_shared) {
1951                 mutex_lock (&adapter->mfe_lock);
1952
1953                 if (adapter->mfe_dvbdev == NULL)
1954                         adapter->mfe_dvbdev = dvbdev;
1955
1956                 else if (adapter->mfe_dvbdev != dvbdev) {
1957                         struct dvb_device
1958                                 *mfedev = adapter->mfe_dvbdev;
1959                         struct dvb_frontend
1960                                 *mfe = mfedev->priv;
1961                         struct dvb_frontend_private
1962                                 *mfepriv = mfe->frontend_priv;
1963                         int mferetry = (dvb_mfe_wait_time << 1);
1964
1965                         mutex_unlock (&adapter->mfe_lock);
1966                         while (mferetry-- && (mfedev->users != -1 ||
1967                                         mfepriv->thread != NULL)) {
1968                                 if(msleep_interruptible(500)) {
1969                                         if(signal_pending(current))
1970                                                 return -EINTR;
1971                                 }
1972                         }
1973
1974                         mutex_lock (&adapter->mfe_lock);
1975                         if(adapter->mfe_dvbdev != dvbdev) {
1976                                 mfedev = adapter->mfe_dvbdev;
1977                                 mfe = mfedev->priv;
1978                                 mfepriv = mfe->frontend_priv;
1979                                 if (mfedev->users != -1 ||
1980                                                 mfepriv->thread != NULL) {
1981                                         mutex_unlock (&adapter->mfe_lock);
1982                                         return -EBUSY;
1983                                 }
1984                                 adapter->mfe_dvbdev = dvbdev;
1985                         }
1986                 }
1987         }
1988
1989         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1990                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1991                         goto err0;
1992
1993                 /* If we took control of the bus, we need to force
1994                    reinitialization.  This is because many ts_bus_ctrl()
1995                    functions strobe the RESET pin on the demod, and if the
1996                    frontend thread already exists then the dvb_init() routine
1997                    won't get called (which is what usually does initial
1998                    register configuration). */
1999                 fepriv->reinitialise = 1;
2000         }
2001
2002         if ((ret = dvb_generic_open (inode, file)) < 0)
2003                 goto err1;
2004
2005         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2006                 /* normal tune mode when opened R/W */
2007                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2008                 fepriv->tone = -1;
2009                 fepriv->voltage = -1;
2010
2011                 ret = dvb_frontend_start (fe);
2012                 if (ret)
2013                         goto err2;
2014
2015                 /*  empty event queue */
2016                 fepriv->events.eventr = fepriv->events.eventw = 0;
2017         }
2018
2019         if (adapter->mfe_shared)
2020                 mutex_unlock (&adapter->mfe_lock);
2021         return ret;
2022
2023 err2:
2024         dvb_generic_release(inode, file);
2025 err1:
2026         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2027                 fe->ops.ts_bus_ctrl(fe, 0);
2028 err0:
2029         if (adapter->mfe_shared)
2030                 mutex_unlock (&adapter->mfe_lock);
2031         return ret;
2032 }
2033
2034 static int dvb_frontend_release(struct inode *inode, struct file *file)
2035 {
2036         struct dvb_device *dvbdev = file->private_data;
2037         struct dvb_frontend *fe = dvbdev->priv;
2038         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2039         int ret;
2040
2041         dprintk ("%s\n", __func__);
2042
2043         if ((file->f_flags & O_ACCMODE) != O_RDONLY)
2044                 fepriv->release_jiffies = jiffies;
2045
2046         ret = dvb_generic_release (inode, file);
2047
2048         if (dvbdev->users == -1) {
2049                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2050                         fops_put(file->f_op);
2051                         file->f_op = NULL;
2052                         wake_up(&dvbdev->wait_queue);
2053                 }
2054                 if (fe->ops.ts_bus_ctrl)
2055                         fe->ops.ts_bus_ctrl(fe, 0);
2056         }
2057
2058         return ret;
2059 }
2060
2061 static const struct file_operations dvb_frontend_fops = {
2062         .owner          = THIS_MODULE,
2063         .unlocked_ioctl = dvb_generic_ioctl,
2064         .poll           = dvb_frontend_poll,
2065         .open           = dvb_frontend_open,
2066         .release        = dvb_frontend_release,
2067         .llseek         = noop_llseek,
2068 };
2069
2070 int dvb_register_frontend(struct dvb_adapter* dvb,
2071                           struct dvb_frontend* fe)
2072 {
2073         struct dvb_frontend_private *fepriv;
2074         static const struct dvb_device dvbdev_template = {
2075                 .users = ~0,
2076                 .writers = 1,
2077                 .readers = (~0)-1,
2078                 .fops = &dvb_frontend_fops,
2079                 .kernel_ioctl = dvb_frontend_ioctl
2080         };
2081
2082         dprintk ("%s\n", __func__);
2083
2084         if (mutex_lock_interruptible(&frontend_mutex))
2085                 return -ERESTARTSYS;
2086
2087         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2088         if (fe->frontend_priv == NULL) {
2089                 mutex_unlock(&frontend_mutex);
2090                 return -ENOMEM;
2091         }
2092         fepriv = fe->frontend_priv;
2093
2094         sema_init(&fepriv->sem, 1);
2095         init_waitqueue_head (&fepriv->wait_queue);
2096         init_waitqueue_head (&fepriv->events.wait_queue);
2097         mutex_init(&fepriv->events.mtx);
2098         fe->dvb = dvb;
2099         fepriv->inversion = INVERSION_OFF;
2100
2101         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2102                 fe->dvb->num,
2103                 fe->id,
2104                 fe->ops.info.name);
2105
2106         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2107                              fe, DVB_DEVICE_FRONTEND);
2108
2109         mutex_unlock(&frontend_mutex);
2110         return 0;
2111 }
2112 EXPORT_SYMBOL(dvb_register_frontend);
2113
2114 int dvb_unregister_frontend(struct dvb_frontend* fe)
2115 {
2116         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2117         dprintk ("%s\n", __func__);
2118
2119         mutex_lock(&frontend_mutex);
2120         dvb_frontend_stop (fe);
2121         mutex_unlock(&frontend_mutex);
2122
2123         if (fepriv->dvbdev->users < -1)
2124                 wait_event(fepriv->dvbdev->wait_queue,
2125                                 fepriv->dvbdev->users==-1);
2126
2127         mutex_lock(&frontend_mutex);
2128         dvb_unregister_device (fepriv->dvbdev);
2129
2130         /* fe is invalid now */
2131         kfree(fepriv);
2132         mutex_unlock(&frontend_mutex);
2133         return 0;
2134 }
2135 EXPORT_SYMBOL(dvb_unregister_frontend);
2136
2137 #ifdef CONFIG_MEDIA_ATTACH
2138 void dvb_frontend_detach(struct dvb_frontend* fe)
2139 {
2140         void *ptr;
2141
2142         if (fe->ops.release_sec) {
2143                 fe->ops.release_sec(fe);
2144                 symbol_put_addr(fe->ops.release_sec);
2145         }
2146         if (fe->ops.tuner_ops.release) {
2147                 fe->ops.tuner_ops.release(fe);
2148                 symbol_put_addr(fe->ops.tuner_ops.release);
2149         }
2150         if (fe->ops.analog_ops.release) {
2151                 fe->ops.analog_ops.release(fe);
2152                 symbol_put_addr(fe->ops.analog_ops.release);
2153         }
2154         ptr = (void*)fe->ops.release;
2155         if (ptr) {
2156                 fe->ops.release(fe);
2157                 symbol_put_addr(ptr);
2158         }
2159 }
2160 #else
2161 void dvb_frontend_detach(struct dvb_frontend* fe)
2162 {
2163         if (fe->ops.release_sec)
2164                 fe->ops.release_sec(fe);
2165         if (fe->ops.tuner_ops.release)
2166                 fe->ops.tuner_ops.release(fe);
2167         if (fe->ops.analog_ops.release)
2168                 fe->ops.analog_ops.release(fe);
2169         if (fe->ops.release)
2170                 fe->ops.release(fe);
2171 }
2172 #endif
2173 EXPORT_SYMBOL(dvb_frontend_detach);