1/* 2 * dvb_frontend.c: DVB frontend tuning interface/thread 3 * 4 * 5 * Copyright (C) 1999-2001 Ralph Metzler 6 * Marcus Metzler 7 * Holger Waechtler 8 * for convergence integrated media GmbH 9 * 10 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup) 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License 14 * as published by the Free Software Foundation; either version 2 15 * of the License, or (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 25 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html 26 */ 27 28/* Enables DVBv3 compatibility bits at the headers */ 29#define __DVB_CORE__ 30 31#include <linux/string.h> 32#include <linux/kernel.h> 33#include <linux/sched.h> 34#include <linux/wait.h> 35#include <linux/slab.h> 36#include <linux/poll.h> 37#include <linux/semaphore.h> 38#include <linux/module.h> 39#include <linux/list.h> 40#include <linux/freezer.h> 41#include <linux/jiffies.h> 42#include <linux/kthread.h> 43#include <asm/processor.h> 44 45#include "dvb_frontend.h" 46#include "dvbdev.h" 47#include <linux/dvb/version.h> 48 49static int dvb_frontend_debug; 50static int dvb_shutdown_timeout; 51static int dvb_force_auto_inversion; 52static int dvb_override_tune_delay; 53static int dvb_powerdown_on_sleep = 1; 54static int dvb_mfe_wait_time = 5; 55 56module_param_named(frontend_debug, dvb_frontend_debug, int, 0644); 57MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off)."); 58module_param(dvb_shutdown_timeout, int, 0644); 59MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); 60module_param(dvb_force_auto_inversion, int, 0644); 61MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); 62module_param(dvb_override_tune_delay, int, 0644); 63MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt"); 64module_param(dvb_powerdown_on_sleep, int, 0644); 65MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)"); 66module_param(dvb_mfe_wait_time, int, 0644); 67MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)"); 68 69#define FESTATE_IDLE 1 70#define FESTATE_RETUNE 2 71#define FESTATE_TUNING_FAST 4 72#define FESTATE_TUNING_SLOW 8 73#define FESTATE_TUNED 16 74#define FESTATE_ZIGZAG_FAST 32 75#define FESTATE_ZIGZAG_SLOW 64 76#define FESTATE_DISEQC 128 77#define FESTATE_ERROR 256 78#define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) 79#define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) 80#define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) 81#define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) 82 83#define FE_ALGO_HW 1 84/* 85 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. 86 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. 87 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. 88 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. 89 * FESTATE_TUNED. The frontend has successfully locked on. 90 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. 91 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. 92 * FESTATE_DISEQC. A DISEQC command has just been issued. 93 * FESTATE_WAITFORLOCK. When we're waiting for a lock. 94 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. 95 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. 96 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. 97 */ 98 99static DEFINE_MUTEX(frontend_mutex); 100 101struct dvb_frontend_private { 102 103 /* thread/frontend values */ 104 struct dvb_device *dvbdev; 105 struct dvb_frontend_parameters parameters_out; 106 struct dvb_fe_events events; 107 struct semaphore sem; 108 struct list_head list_head; 109 wait_queue_head_t wait_queue; 110 struct task_struct *thread; 111 unsigned long release_jiffies; 112 unsigned int wakeup; 113 fe_status_t status; 114 unsigned long tune_mode_flags; 115 unsigned int delay; 116 unsigned int reinitialise; 117 int tone; 118 int voltage; 119 120 /* swzigzag values */ 121 unsigned int state; 122 unsigned int bending; 123 int lnb_drift; 124 unsigned int inversion; 125 unsigned int auto_step; 126 unsigned int auto_sub_step; 127 unsigned int started_auto_step; 128 unsigned int min_delay; 129 unsigned int max_drift; 130 unsigned int step_size; 131 int quality; 132 unsigned int check_wrapped; 133 enum dvbfe_search algo_status; 134 135#if defined(CONFIG_MEDIA_CONTROLLER_DVB) 136 struct media_pipeline pipe; 137 struct media_entity *pipe_start_entity; 138#endif 139}; 140 141static void dvb_frontend_wakeup(struct dvb_frontend *fe); 142static int dtv_get_frontend(struct dvb_frontend *fe, 143 struct dvb_frontend_parameters *p_out); 144static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, 145 struct dvb_frontend_parameters *p); 146 147static bool has_get_frontend(struct dvb_frontend *fe) 148{ 149 return fe->ops.get_frontend != NULL; 150} 151 152/* 153 * Due to DVBv3 API calls, a delivery system should be mapped into one of 154 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC), 155 * otherwise, a DVBv3 call will fail. 156 */ 157enum dvbv3_emulation_type { 158 DVBV3_UNKNOWN, 159 DVBV3_QPSK, 160 DVBV3_QAM, 161 DVBV3_OFDM, 162 DVBV3_ATSC, 163}; 164 165static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system) 166{ 167 switch (delivery_system) { 168 case SYS_DVBC_ANNEX_A: 169 case SYS_DVBC_ANNEX_C: 170 return DVBV3_QAM; 171 case SYS_DVBS: 172 case SYS_DVBS2: 173 case SYS_TURBO: 174 case SYS_ISDBS: 175 case SYS_DSS: 176 return DVBV3_QPSK; 177 case SYS_DVBT: 178 case SYS_DVBT2: 179 case SYS_ISDBT: 180 case SYS_DTMB: 181 return DVBV3_OFDM; 182 case SYS_ATSC: 183 case SYS_ATSCMH: 184 case SYS_DVBC_ANNEX_B: 185 return DVBV3_ATSC; 186 case SYS_UNDEFINED: 187 case SYS_ISDBC: 188 case SYS_DVBH: 189 case SYS_DAB: 190 default: 191 /* 192 * Doesn't know how to emulate those types and/or 193 * there's no frontend driver from this type yet 194 * with some emulation code, so, we're not sure yet how 195 * to handle them, or they're not compatible with a DVBv3 call. 196 */ 197 return DVBV3_UNKNOWN; 198 } 199} 200 201static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) 202{ 203 struct dvb_frontend_private *fepriv = fe->frontend_priv; 204 struct dvb_fe_events *events = &fepriv->events; 205 struct dvb_frontend_event *e; 206 int wp; 207 208 dev_dbg(fe->dvb->device, "%s:\n", __func__); 209 210 if ((status & FE_HAS_LOCK) && has_get_frontend(fe)) 211 dtv_get_frontend(fe, &fepriv->parameters_out); 212 213 mutex_lock(&events->mtx); 214 215 wp = (events->eventw + 1) % MAX_EVENT; 216 if (wp == events->eventr) { 217 events->overflow = 1; 218 events->eventr = (events->eventr + 1) % MAX_EVENT; 219 } 220 221 e = &events->events[events->eventw]; 222 e->status = status; 223 e->parameters = fepriv->parameters_out; 224 225 events->eventw = wp; 226 227 mutex_unlock(&events->mtx); 228 229 wake_up_interruptible (&events->wait_queue); 230} 231 232static int dvb_frontend_get_event(struct dvb_frontend *fe, 233 struct dvb_frontend_event *event, int flags) 234{ 235 struct dvb_frontend_private *fepriv = fe->frontend_priv; 236 struct dvb_fe_events *events = &fepriv->events; 237 238 dev_dbg(fe->dvb->device, "%s:\n", __func__); 239 240 if (events->overflow) { 241 events->overflow = 0; 242 return -EOVERFLOW; 243 } 244 245 if (events->eventw == events->eventr) { 246 int ret; 247 248 if (flags & O_NONBLOCK) 249 return -EWOULDBLOCK; 250 251 up(&fepriv->sem); 252 253 ret = wait_event_interruptible (events->wait_queue, 254 events->eventw != events->eventr); 255 256 if (down_interruptible (&fepriv->sem)) 257 return -ERESTARTSYS; 258 259 if (ret < 0) 260 return ret; 261 } 262 263 mutex_lock(&events->mtx); 264 *event = events->events[events->eventr]; 265 events->eventr = (events->eventr + 1) % MAX_EVENT; 266 mutex_unlock(&events->mtx); 267 268 return 0; 269} 270 271static void dvb_frontend_clear_events(struct dvb_frontend *fe) 272{ 273 struct dvb_frontend_private *fepriv = fe->frontend_priv; 274 struct dvb_fe_events *events = &fepriv->events; 275 276 mutex_lock(&events->mtx); 277 events->eventr = events->eventw; 278 mutex_unlock(&events->mtx); 279} 280 281static void dvb_frontend_init(struct dvb_frontend *fe) 282{ 283 dev_dbg(fe->dvb->device, 284 "%s: initialising adapter %i frontend %i (%s)...\n", 285 __func__, fe->dvb->num, fe->id, fe->ops.info.name); 286 287 if (fe->ops.init) 288 fe->ops.init(fe); 289 if (fe->ops.tuner_ops.init) { 290 if (fe->ops.i2c_gate_ctrl) 291 fe->ops.i2c_gate_ctrl(fe, 1); 292 fe->ops.tuner_ops.init(fe); 293 if (fe->ops.i2c_gate_ctrl) 294 fe->ops.i2c_gate_ctrl(fe, 0); 295 } 296} 297 298void dvb_frontend_reinitialise(struct dvb_frontend *fe) 299{ 300 struct dvb_frontend_private *fepriv = fe->frontend_priv; 301 302 fepriv->reinitialise = 1; 303 dvb_frontend_wakeup(fe); 304} 305EXPORT_SYMBOL(dvb_frontend_reinitialise); 306 307static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) 308{ 309 int q2; 310 struct dvb_frontend *fe = fepriv->dvbdev->priv; 311 312 dev_dbg(fe->dvb->device, "%s:\n", __func__); 313 314 if (locked) 315 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; 316 else 317 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; 318 319 q2 = fepriv->quality - 128; 320 q2 *= q2; 321 322 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); 323} 324 325/** 326 * Performs automatic twiddling of frontend parameters. 327 * 328 * @param fe The frontend concerned. 329 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT 330 * @returns Number of complete iterations that have been performed. 331 */ 332static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) 333{ 334 int autoinversion; 335 int ready = 0; 336 int fe_set_err = 0; 337 struct dvb_frontend_private *fepriv = fe->frontend_priv; 338 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 339 int original_inversion = c->inversion; 340 u32 original_frequency = c->frequency; 341 342 /* are we using autoinversion? */ 343 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 344 (c->inversion == INVERSION_AUTO)); 345 346 /* setup parameters correctly */ 347 while(!ready) { 348 /* calculate the lnb_drift */ 349 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; 350 351 /* wrap the auto_step if we've exceeded the maximum drift */ 352 if (fepriv->lnb_drift > fepriv->max_drift) { 353 fepriv->auto_step = 0; 354 fepriv->auto_sub_step = 0; 355 fepriv->lnb_drift = 0; 356 } 357 358 /* perform inversion and +/- zigzag */ 359 switch(fepriv->auto_sub_step) { 360 case 0: 361 /* try with the current inversion and current drift setting */ 362 ready = 1; 363 break; 364 365 case 1: 366 if (!autoinversion) break; 367 368 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 369 ready = 1; 370 break; 371 372 case 2: 373 if (fepriv->lnb_drift == 0) break; 374 375 fepriv->lnb_drift = -fepriv->lnb_drift; 376 ready = 1; 377 break; 378 379 case 3: 380 if (fepriv->lnb_drift == 0) break; 381 if (!autoinversion) break; 382 383 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 384 fepriv->lnb_drift = -fepriv->lnb_drift; 385 ready = 1; 386 break; 387 388 default: 389 fepriv->auto_step++; 390 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ 391 break; 392 } 393 394 if (!ready) fepriv->auto_sub_step++; 395 } 396 397 /* if this attempt would hit where we started, indicate a complete 398 * iteration has occurred */ 399 if ((fepriv->auto_step == fepriv->started_auto_step) && 400 (fepriv->auto_sub_step == 0) && check_wrapped) { 401 return 1; 402 } 403 404 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \ 405 "auto_sub_step:%i started_auto_step:%i\n", 406 __func__, fepriv->lnb_drift, fepriv->inversion, 407 fepriv->auto_step, fepriv->auto_sub_step, 408 fepriv->started_auto_step); 409 410 /* set the frontend itself */ 411 c->frequency += fepriv->lnb_drift; 412 if (autoinversion) 413 c->inversion = fepriv->inversion; 414 tmp = *c; 415 if (fe->ops.set_frontend) 416 fe_set_err = fe->ops.set_frontend(fe); 417 *c = tmp; 418 if (fe_set_err < 0) { 419 fepriv->state = FESTATE_ERROR; 420 return fe_set_err; 421 } 422 423 c->frequency = original_frequency; 424 c->inversion = original_inversion; 425 426 fepriv->auto_sub_step++; 427 return 0; 428} 429 430static void dvb_frontend_swzigzag(struct dvb_frontend *fe) 431{ 432 fe_status_t s = 0; 433 int retval = 0; 434 struct dvb_frontend_private *fepriv = fe->frontend_priv; 435 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 436 437 /* if we've got no parameters, just keep idling */ 438 if (fepriv->state & FESTATE_IDLE) { 439 fepriv->delay = 3*HZ; 440 fepriv->quality = 0; 441 return; 442 } 443 444 /* in SCAN mode, we just set the frontend when asked and leave it alone */ 445 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { 446 if (fepriv->state & FESTATE_RETUNE) { 447 tmp = *c; 448 if (fe->ops.set_frontend) 449 retval = fe->ops.set_frontend(fe); 450 *c = tmp; 451 if (retval < 0) 452 fepriv->state = FESTATE_ERROR; 453 else 454 fepriv->state = FESTATE_TUNED; 455 } 456 fepriv->delay = 3*HZ; 457 fepriv->quality = 0; 458 return; 459 } 460 461 /* get the frontend status */ 462 if (fepriv->state & FESTATE_RETUNE) { 463 s = 0; 464 } else { 465 if (fe->ops.read_status) 466 fe->ops.read_status(fe, &s); 467 if (s != fepriv->status) { 468 dvb_frontend_add_event(fe, s); 469 fepriv->status = s; 470 } 471 } 472 473 /* if we're not tuned, and we have a lock, move to the TUNED state */ 474 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { 475 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 476 fepriv->state = FESTATE_TUNED; 477 478 /* if we're tuned, then we have determined the correct inversion */ 479 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 480 (c->inversion == INVERSION_AUTO)) { 481 c->inversion = fepriv->inversion; 482 } 483 return; 484 } 485 486 /* if we are tuned already, check we're still locked */ 487 if (fepriv->state & FESTATE_TUNED) { 488 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 489 490 /* we're tuned, and the lock is still good... */ 491 if (s & FE_HAS_LOCK) { 492 return; 493 } else { /* if we _WERE_ tuned, but now don't have a lock */ 494 fepriv->state = FESTATE_ZIGZAG_FAST; 495 fepriv->started_auto_step = fepriv->auto_step; 496 fepriv->check_wrapped = 0; 497 } 498 } 499 500 /* don't actually do anything if we're in the LOSTLOCK state, 501 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ 502 if ((fepriv->state & FESTATE_LOSTLOCK) && 503 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { 504 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 505 return; 506 } 507 508 /* don't do anything if we're in the DISEQC state, since this 509 * might be someone with a motorized dish controlled by DISEQC. 510 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ 511 if (fepriv->state & FESTATE_DISEQC) { 512 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 513 return; 514 } 515 516 /* if we're in the RETUNE state, set everything up for a brand 517 * new scan, keeping the current inversion setting, as the next 518 * tune is _very_ likely to require the same */ 519 if (fepriv->state & FESTATE_RETUNE) { 520 fepriv->lnb_drift = 0; 521 fepriv->auto_step = 0; 522 fepriv->auto_sub_step = 0; 523 fepriv->started_auto_step = 0; 524 fepriv->check_wrapped = 0; 525 } 526 527 /* fast zigzag. */ 528 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { 529 fepriv->delay = fepriv->min_delay; 530 531 /* perform a tune */ 532 retval = dvb_frontend_swzigzag_autotune(fe, 533 fepriv->check_wrapped); 534 if (retval < 0) { 535 return; 536 } else if (retval) { 537 /* OK, if we've run out of trials at the fast speed. 538 * Drop back to slow for the _next_ attempt */ 539 fepriv->state = FESTATE_SEARCHING_SLOW; 540 fepriv->started_auto_step = fepriv->auto_step; 541 return; 542 } 543 fepriv->check_wrapped = 1; 544 545 /* if we've just retuned, enter the ZIGZAG_FAST state. 546 * This ensures we cannot return from an 547 * FE_SET_FRONTEND ioctl before the first frontend tune 548 * occurs */ 549 if (fepriv->state & FESTATE_RETUNE) { 550 fepriv->state = FESTATE_TUNING_FAST; 551 } 552 } 553 554 /* slow zigzag */ 555 if (fepriv->state & FESTATE_SEARCHING_SLOW) { 556 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 557 558 /* Note: don't bother checking for wrapping; we stay in this 559 * state until we get a lock */ 560 dvb_frontend_swzigzag_autotune(fe, 0); 561 } 562} 563 564static int dvb_frontend_is_exiting(struct dvb_frontend *fe) 565{ 566 struct dvb_frontend_private *fepriv = fe->frontend_priv; 567 568 if (fe->exit != DVB_FE_NO_EXIT) 569 return 1; 570 571 if (fepriv->dvbdev->writers == 1) 572 if (time_after_eq(jiffies, fepriv->release_jiffies + 573 dvb_shutdown_timeout * HZ)) 574 return 1; 575 576 return 0; 577} 578 579static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) 580{ 581 struct dvb_frontend_private *fepriv = fe->frontend_priv; 582 583 if (fepriv->wakeup) { 584 fepriv->wakeup = 0; 585 return 1; 586 } 587 return dvb_frontend_is_exiting(fe); 588} 589 590static void dvb_frontend_wakeup(struct dvb_frontend *fe) 591{ 592 struct dvb_frontend_private *fepriv = fe->frontend_priv; 593 594 fepriv->wakeup = 1; 595 wake_up_interruptible(&fepriv->wait_queue); 596} 597 598/** 599 * dvb_enable_media_tuner() - tries to enable the DVB tuner 600 * 601 * @fe: struct dvb_frontend pointer 602 * 603 * This function ensures that just one media tuner is enabled for a given 604 * frontend. It has two different behaviors: 605 * - For trivial devices with just one tuner: 606 * it just enables the existing tuner->fe link 607 * - For devices with more than one tuner: 608 * It is up to the driver to implement the logic that will enable one tuner 609 * and disable the other ones. However, if more than one tuner is enabled for 610 * the same frontend, it will print an error message and return -EINVAL. 611 * 612 * At return, it will return the error code returned by media_entity_setup_link, 613 * or 0 if everything is OK, if no tuner is linked to the frontend or if the 614 * mdev is NULL. 615 */ 616#ifdef CONFIG_MEDIA_CONTROLLER_DVB 617static int dvb_enable_media_tuner(struct dvb_frontend *fe) 618{ 619 struct dvb_frontend_private *fepriv = fe->frontend_priv; 620 struct dvb_adapter *adapter = fe->dvb; 621 struct media_device *mdev = adapter->mdev; 622 struct media_entity *entity, *source; 623 struct media_link *link, *found_link = NULL; 624 int i, ret, n_links = 0, active_links = 0; 625 626 fepriv->pipe_start_entity = NULL; 627 628 if (!mdev) 629 return 0; 630 631 entity = fepriv->dvbdev->entity; 632 fepriv->pipe_start_entity = entity; 633 634 for (i = 0; i < entity->num_links; i++) { 635 link = &entity->links[i]; 636 if (link->sink->entity == entity) { 637 found_link = link; 638 n_links++; 639 if (link->flags & MEDIA_LNK_FL_ENABLED) 640 active_links++; 641 } 642 } 643 644 if (!n_links || active_links == 1 || !found_link) 645 return 0; 646 647 /* 648 * If a frontend has more than one tuner linked, it is up to the driver 649 * to select with one will be the active one, as the frontend core can't 650 * guess. If the driver doesn't do that, it is a bug. 651 */ 652 if (n_links > 1 && active_links != 1) { 653 dev_err(fe->dvb->device, 654 "WARNING: there are %d active links among %d tuners. This is a driver's bug!\n", 655 active_links, n_links); 656 return -EINVAL; 657 } 658 659 source = found_link->source->entity; 660 fepriv->pipe_start_entity = source; 661 for (i = 0; i < source->num_links; i++) { 662 struct media_entity *sink; 663 int flags = 0; 664 665 link = &source->links[i]; 666 sink = link->sink->entity; 667 668 if (sink == entity) 669 flags = MEDIA_LNK_FL_ENABLED; 670 671 ret = media_entity_setup_link(link, flags); 672 if (ret) { 673 dev_err(fe->dvb->device, 674 "Couldn't change link %s->%s to %s. Error %d\n", 675 source->name, sink->name, 676 flags ? "enabled" : "disabled", 677 ret); 678 return ret; 679 } else 680 dev_dbg(fe->dvb->device, 681 "link %s->%s was %s\n", 682 source->name, sink->name, 683 flags ? "ENABLED" : "disabled"); 684 } 685 return 0; 686} 687#endif 688 689static int dvb_frontend_thread(void *data) 690{ 691 struct dvb_frontend *fe = data; 692 struct dvb_frontend_private *fepriv = fe->frontend_priv; 693 fe_status_t s; 694 enum dvbfe_algo algo; 695#ifdef CONFIG_MEDIA_CONTROLLER_DVB 696 int ret; 697#endif 698 699 bool re_tune = false; 700 bool semheld = false; 701 702 dev_dbg(fe->dvb->device, "%s:\n", __func__); 703 704 fepriv->check_wrapped = 0; 705 fepriv->quality = 0; 706 fepriv->delay = 3*HZ; 707 fepriv->status = 0; 708 fepriv->wakeup = 0; 709 fepriv->reinitialise = 0; 710 711#ifdef CONFIG_MEDIA_CONTROLLER_DVB 712 ret = dvb_enable_media_tuner(fe); 713 if (ret) { 714 /* FIXME: return an error if it fails */ 715 dev_info(fe->dvb->device, 716 "proceeding with FE task\n"); 717 } else if (fepriv->pipe_start_entity) { 718 ret = media_entity_pipeline_start(fepriv->pipe_start_entity, 719 &fepriv->pipe); 720 if (ret) 721 return ret; 722 } 723#endif 724 725 dvb_frontend_init(fe); 726 727 set_freezable(); 728 while (1) { 729 up(&fepriv->sem); /* is locked when we enter the thread... */ 730restart: 731 wait_event_interruptible_timeout(fepriv->wait_queue, 732 dvb_frontend_should_wakeup(fe) || kthread_should_stop() 733 || freezing(current), 734 fepriv->delay); 735 736 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { 737 /* got signal or quitting */ 738 if (!down_interruptible(&fepriv->sem)) 739 semheld = true; 740 fe->exit = DVB_FE_NORMAL_EXIT; 741 break; 742 } 743 744 if (try_to_freeze()) 745 goto restart; 746 747 if (down_interruptible(&fepriv->sem)) 748 break; 749 750 if (fepriv->reinitialise) { 751 dvb_frontend_init(fe); 752 if (fe->ops.set_tone && fepriv->tone != -1) 753 fe->ops.set_tone(fe, fepriv->tone); 754 if (fe->ops.set_voltage && fepriv->voltage != -1) 755 fe->ops.set_voltage(fe, fepriv->voltage); 756 fepriv->reinitialise = 0; 757 } 758 759 /* do an iteration of the tuning loop */ 760 if (fe->ops.get_frontend_algo) { 761 algo = fe->ops.get_frontend_algo(fe); 762 switch (algo) { 763 case DVBFE_ALGO_HW: 764 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); 765 766 if (fepriv->state & FESTATE_RETUNE) { 767 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__); 768 re_tune = true; 769 fepriv->state = FESTATE_TUNED; 770 } else { 771 re_tune = false; 772 } 773 774 if (fe->ops.tune) 775 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s); 776 777 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { 778 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__); 779 dvb_frontend_add_event(fe, s); 780 fepriv->status = s; 781 } 782 break; 783 case DVBFE_ALGO_SW: 784 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); 785 dvb_frontend_swzigzag(fe); 786 break; 787 case DVBFE_ALGO_CUSTOM: 788 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); 789 if (fepriv->state & FESTATE_RETUNE) { 790 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__); 791 fepriv->state = FESTATE_TUNED; 792 } 793 /* Case where we are going to search for a carrier 794 * User asked us to retune again for some reason, possibly 795 * requesting a search with a new set of parameters 796 */ 797 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { 798 if (fe->ops.search) { 799 fepriv->algo_status = fe->ops.search(fe); 800 /* We did do a search as was requested, the flags are 801 * now unset as well and has the flags wrt to search. 802 */ 803 } else { 804 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; 805 } 806 } 807 /* Track the carrier if the search was successful */ 808 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) { 809 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 810 fepriv->delay = HZ / 2; 811 } 812 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); 813 fe->ops.read_status(fe, &s); 814 if (s != fepriv->status) { 815 dvb_frontend_add_event(fe, s); /* update event list */ 816 fepriv->status = s; 817 if (!(s & FE_HAS_LOCK)) { 818 fepriv->delay = HZ / 10; 819 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 820 } else { 821 fepriv->delay = 60 * HZ; 822 } 823 } 824 break; 825 default: 826 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__); 827 break; 828 } 829 } else { 830 dvb_frontend_swzigzag(fe); 831 } 832 } 833 834#ifdef CONFIG_MEDIA_CONTROLLER_DVB 835 if (fepriv->pipe_start_entity) 836 media_entity_pipeline_stop(fepriv->pipe_start_entity); 837 fepriv->pipe_start_entity = NULL; 838#endif 839 840 if (dvb_powerdown_on_sleep) { 841 if (fe->ops.set_voltage) 842 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); 843 if (fe->ops.tuner_ops.sleep) { 844 if (fe->ops.i2c_gate_ctrl) 845 fe->ops.i2c_gate_ctrl(fe, 1); 846 fe->ops.tuner_ops.sleep(fe); 847 if (fe->ops.i2c_gate_ctrl) 848 fe->ops.i2c_gate_ctrl(fe, 0); 849 } 850 if (fe->ops.sleep) 851 fe->ops.sleep(fe); 852 } 853 854 fepriv->thread = NULL; 855 if (kthread_should_stop()) 856 fe->exit = DVB_FE_DEVICE_REMOVED; 857 else 858 fe->exit = DVB_FE_NO_EXIT; 859 mb(); 860 861 if (semheld) 862 up(&fepriv->sem); 863 dvb_frontend_wakeup(fe); 864 return 0; 865} 866 867static void dvb_frontend_stop(struct dvb_frontend *fe) 868{ 869 struct dvb_frontend_private *fepriv = fe->frontend_priv; 870 871 dev_dbg(fe->dvb->device, "%s:\n", __func__); 872 873 if (fe->exit != DVB_FE_DEVICE_REMOVED) 874 fe->exit = DVB_FE_NORMAL_EXIT; 875 mb(); 876 877 if (!fepriv->thread) 878 return; 879 880 kthread_stop(fepriv->thread); 881 882 sema_init(&fepriv->sem, 1); 883 fepriv->state = FESTATE_IDLE; 884 885 /* paranoia check in case a signal arrived */ 886 if (fepriv->thread) 887 dev_warn(fe->dvb->device, 888 "dvb_frontend_stop: warning: thread %p won't exit\n", 889 fepriv->thread); 890} 891 892s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) 893{ 894 return ((curtime.tv_usec < lasttime.tv_usec) ? 895 1000000 - lasttime.tv_usec + curtime.tv_usec : 896 curtime.tv_usec - lasttime.tv_usec); 897} 898EXPORT_SYMBOL(timeval_usec_diff); 899 900static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) 901{ 902 curtime->tv_usec += add_usec; 903 if (curtime->tv_usec >= 1000000) { 904 curtime->tv_usec -= 1000000; 905 curtime->tv_sec++; 906 } 907} 908 909/* 910 * Sleep until gettimeofday() > waketime + add_usec 911 * This needs to be as precise as possible, but as the delay is 912 * usually between 2ms and 32ms, it is done using a scheduled msleep 913 * followed by usleep (normally a busy-wait loop) for the remainder 914 */ 915void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) 916{ 917 struct timeval lasttime; 918 s32 delta, newdelta; 919 920 timeval_usec_add(waketime, add_usec); 921 922 do_gettimeofday(&lasttime); 923 delta = timeval_usec_diff(lasttime, *waketime); 924 if (delta > 2500) { 925 msleep((delta - 1500) / 1000); 926 do_gettimeofday(&lasttime); 927 newdelta = timeval_usec_diff(lasttime, *waketime); 928 delta = (newdelta > delta) ? 0 : newdelta; 929 } 930 if (delta > 0) 931 udelay(delta); 932} 933EXPORT_SYMBOL(dvb_frontend_sleep_until); 934 935static int dvb_frontend_start(struct dvb_frontend *fe) 936{ 937 int ret; 938 struct dvb_frontend_private *fepriv = fe->frontend_priv; 939 struct task_struct *fe_thread; 940 941 dev_dbg(fe->dvb->device, "%s:\n", __func__); 942 943 if (fepriv->thread) { 944 if (fe->exit == DVB_FE_NO_EXIT) 945 return 0; 946 else 947 dvb_frontend_stop (fe); 948 } 949 950 if (signal_pending(current)) 951 return -EINTR; 952 if (down_interruptible (&fepriv->sem)) 953 return -EINTR; 954 955 fepriv->state = FESTATE_IDLE; 956 fe->exit = DVB_FE_NO_EXIT; 957 fepriv->thread = NULL; 958 mb(); 959 960 fe_thread = kthread_run(dvb_frontend_thread, fe, 961 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id); 962 if (IS_ERR(fe_thread)) { 963 ret = PTR_ERR(fe_thread); 964 dev_warn(fe->dvb->device, 965 "dvb_frontend_start: failed to start kthread (%d)\n", 966 ret); 967 up(&fepriv->sem); 968 return ret; 969 } 970 fepriv->thread = fe_thread; 971 return 0; 972} 973 974static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe, 975 u32 *freq_min, u32 *freq_max) 976{ 977 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min); 978 979 if (fe->ops.info.frequency_max == 0) 980 *freq_max = fe->ops.tuner_ops.info.frequency_max; 981 else if (fe->ops.tuner_ops.info.frequency_max == 0) 982 *freq_max = fe->ops.info.frequency_max; 983 else 984 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max); 985 986 if (*freq_min == 0 || *freq_max == 0) 987 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n", 988 fe->dvb->num, fe->id); 989} 990 991static int dvb_frontend_check_parameters(struct dvb_frontend *fe) 992{ 993 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 994 u32 freq_min; 995 u32 freq_max; 996 997 /* range check: frequency */ 998 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max); 999 if ((freq_min && c->frequency < freq_min) || 1000 (freq_max && c->frequency > freq_max)) { 1001 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n", 1002 fe->dvb->num, fe->id, c->frequency, 1003 freq_min, freq_max); 1004 return -EINVAL; 1005 } 1006 1007 /* range check: symbol rate */ 1008 switch (c->delivery_system) { 1009 case SYS_DVBS: 1010 case SYS_DVBS2: 1011 case SYS_TURBO: 1012 case SYS_DVBC_ANNEX_A: 1013 case SYS_DVBC_ANNEX_C: 1014 if ((fe->ops.info.symbol_rate_min && 1015 c->symbol_rate < fe->ops.info.symbol_rate_min) || 1016 (fe->ops.info.symbol_rate_max && 1017 c->symbol_rate > fe->ops.info.symbol_rate_max)) { 1018 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", 1019 fe->dvb->num, fe->id, c->symbol_rate, 1020 fe->ops.info.symbol_rate_min, 1021 fe->ops.info.symbol_rate_max); 1022 return -EINVAL; 1023 } 1024 default: 1025 break; 1026 } 1027 1028 return 0; 1029} 1030 1031static int dvb_frontend_clear_cache(struct dvb_frontend *fe) 1032{ 1033 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1034 int i; 1035 u32 delsys; 1036 1037 delsys = c->delivery_system; 1038 memset(c, 0, offsetof(struct dtv_frontend_properties, strength)); 1039 c->delivery_system = delsys; 1040 1041 c->state = DTV_CLEAR; 1042 1043 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n", 1044 __func__, c->delivery_system); 1045 1046 c->transmission_mode = TRANSMISSION_MODE_AUTO; 1047 c->bandwidth_hz = 0; /* AUTO */ 1048 c->guard_interval = GUARD_INTERVAL_AUTO; 1049 c->hierarchy = HIERARCHY_AUTO; 1050 c->symbol_rate = 0; 1051 c->code_rate_HP = FEC_AUTO; 1052 c->code_rate_LP = FEC_AUTO; 1053 c->fec_inner = FEC_AUTO; 1054 c->rolloff = ROLLOFF_AUTO; 1055 c->voltage = SEC_VOLTAGE_OFF; 1056 c->sectone = SEC_TONE_OFF; 1057 c->pilot = PILOT_AUTO; 1058 1059 c->isdbt_partial_reception = 0; 1060 c->isdbt_sb_mode = 0; 1061 c->isdbt_sb_subchannel = 0; 1062 c->isdbt_sb_segment_idx = 0; 1063 c->isdbt_sb_segment_count = 0; 1064 c->isdbt_layer_enabled = 0; 1065 for (i = 0; i < 3; i++) { 1066 c->layer[i].fec = FEC_AUTO; 1067 c->layer[i].modulation = QAM_AUTO; 1068 c->layer[i].interleaving = 0; 1069 c->layer[i].segment_count = 0; 1070 } 1071 1072 c->stream_id = NO_STREAM_ID_FILTER; 1073 1074 switch (c->delivery_system) { 1075 case SYS_DVBS: 1076 case SYS_DVBS2: 1077 case SYS_TURBO: 1078 c->modulation = QPSK; /* implied for DVB-S in legacy API */ 1079 c->rolloff = ROLLOFF_35;/* implied for DVB-S */ 1080 break; 1081 case SYS_ATSC: 1082 c->modulation = VSB_8; 1083 break; 1084 case SYS_ISDBS: 1085 c->symbol_rate = 28860000; 1086 c->rolloff = ROLLOFF_35; 1087 c->bandwidth_hz = c->symbol_rate / 100 * 135; 1088 break; 1089 default: 1090 c->modulation = QAM_AUTO; 1091 break; 1092 } 1093 1094 c->lna = LNA_AUTO; 1095 1096 return 0; 1097} 1098 1099#define _DTV_CMD(n, s, b) \ 1100[n] = { \ 1101 .name = #n, \ 1102 .cmd = n, \ 1103 .set = s,\ 1104 .buffer = b \ 1105} 1106 1107static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = { 1108 _DTV_CMD(DTV_TUNE, 1, 0), 1109 _DTV_CMD(DTV_CLEAR, 1, 0), 1110 1111 /* Set */ 1112 _DTV_CMD(DTV_FREQUENCY, 1, 0), 1113 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), 1114 _DTV_CMD(DTV_MODULATION, 1, 0), 1115 _DTV_CMD(DTV_INVERSION, 1, 0), 1116 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), 1117 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), 1118 _DTV_CMD(DTV_INNER_FEC, 1, 0), 1119 _DTV_CMD(DTV_VOLTAGE, 1, 0), 1120 _DTV_CMD(DTV_TONE, 1, 0), 1121 _DTV_CMD(DTV_PILOT, 1, 0), 1122 _DTV_CMD(DTV_ROLLOFF, 1, 0), 1123 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), 1124 _DTV_CMD(DTV_HIERARCHY, 1, 0), 1125 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), 1126 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), 1127 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), 1128 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), 1129 _DTV_CMD(DTV_INTERLEAVING, 1, 0), 1130 1131 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), 1132 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), 1133 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), 1134 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), 1135 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), 1136 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), 1137 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), 1138 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), 1139 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), 1140 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), 1141 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), 1142 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), 1143 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), 1144 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), 1145 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), 1146 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), 1147 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), 1148 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), 1149 1150 _DTV_CMD(DTV_STREAM_ID, 1, 0), 1151 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0), 1152 _DTV_CMD(DTV_LNA, 1, 0), 1153 1154 /* Get */ 1155 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), 1156 _DTV_CMD(DTV_API_VERSION, 0, 0), 1157 1158 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0), 1159 1160 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0), 1161 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0), 1162 1163 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0), 1164 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0), 1165 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0), 1166 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0), 1167 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0), 1168 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0), 1169 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0), 1170 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0), 1171 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0), 1172 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0), 1173 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0), 1174 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0), 1175 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0), 1176 1177 /* Statistics API */ 1178 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0), 1179 _DTV_CMD(DTV_STAT_CNR, 0, 0), 1180 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0), 1181 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0), 1182 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0), 1183 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0), 1184 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0), 1185 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0), 1186}; 1187 1188static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp) 1189{ 1190 int i; 1191 1192 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) { 1193 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n", 1194 __func__, tvp->cmd); 1195 return; 1196 } 1197 1198 dev_dbg(fe->dvb->device, "%s: tvp.cmd = 0x%08x (%s)\n", __func__, 1199 tvp->cmd, dtv_cmds[tvp->cmd].name); 1200 1201 if (dtv_cmds[tvp->cmd].buffer) { 1202 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n", 1203 __func__, tvp->u.buffer.len); 1204 1205 for(i = 0; i < tvp->u.buffer.len; i++) 1206 dev_dbg(fe->dvb->device, 1207 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n", 1208 __func__, i, tvp->u.buffer.data[i]); 1209 } else { 1210 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__, 1211 tvp->u.data); 1212 } 1213} 1214 1215/* Synchronise the legacy tuning parameters into the cache, so that demodulator 1216 * drivers can use a single set_frontend tuning function, regardless of whether 1217 * it's being used for the legacy or new API, reducing code and complexity. 1218 */ 1219static int dtv_property_cache_sync(struct dvb_frontend *fe, 1220 struct dtv_frontend_properties *c, 1221 const struct dvb_frontend_parameters *p) 1222{ 1223 c->frequency = p->frequency; 1224 c->inversion = p->inversion; 1225 1226 switch (dvbv3_type(c->delivery_system)) { 1227 case DVBV3_QPSK: 1228 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1229 c->symbol_rate = p->u.qpsk.symbol_rate; 1230 c->fec_inner = p->u.qpsk.fec_inner; 1231 break; 1232 case DVBV3_QAM: 1233 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1234 c->symbol_rate = p->u.qam.symbol_rate; 1235 c->fec_inner = p->u.qam.fec_inner; 1236 c->modulation = p->u.qam.modulation; 1237 break; 1238 case DVBV3_OFDM: 1239 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1240 1241 switch (p->u.ofdm.bandwidth) { 1242 case BANDWIDTH_10_MHZ: 1243 c->bandwidth_hz = 10000000; 1244 break; 1245 case BANDWIDTH_8_MHZ: 1246 c->bandwidth_hz = 8000000; 1247 break; 1248 case BANDWIDTH_7_MHZ: 1249 c->bandwidth_hz = 7000000; 1250 break; 1251 case BANDWIDTH_6_MHZ: 1252 c->bandwidth_hz = 6000000; 1253 break; 1254 case BANDWIDTH_5_MHZ: 1255 c->bandwidth_hz = 5000000; 1256 break; 1257 case BANDWIDTH_1_712_MHZ: 1258 c->bandwidth_hz = 1712000; 1259 break; 1260 case BANDWIDTH_AUTO: 1261 c->bandwidth_hz = 0; 1262 } 1263 1264 c->code_rate_HP = p->u.ofdm.code_rate_HP; 1265 c->code_rate_LP = p->u.ofdm.code_rate_LP; 1266 c->modulation = p->u.ofdm.constellation; 1267 c->transmission_mode = p->u.ofdm.transmission_mode; 1268 c->guard_interval = p->u.ofdm.guard_interval; 1269 c->hierarchy = p->u.ofdm.hierarchy_information; 1270 break; 1271 case DVBV3_ATSC: 1272 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__); 1273 c->modulation = p->u.vsb.modulation; 1274 if (c->delivery_system == SYS_ATSCMH) 1275 break; 1276 if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) 1277 c->delivery_system = SYS_ATSC; 1278 else 1279 c->delivery_system = SYS_DVBC_ANNEX_B; 1280 break; 1281 case DVBV3_UNKNOWN: 1282 dev_err(fe->dvb->device, 1283 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1284 __func__, c->delivery_system); 1285 return -EINVAL; 1286 } 1287 1288 return 0; 1289} 1290 1291/* Ensure the cached values are set correctly in the frontend 1292 * legacy tuning structures, for the advanced tuning API. 1293 */ 1294static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, 1295 struct dvb_frontend_parameters *p) 1296{ 1297 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1298 1299 p->frequency = c->frequency; 1300 p->inversion = c->inversion; 1301 1302 switch (dvbv3_type(c->delivery_system)) { 1303 case DVBV3_UNKNOWN: 1304 dev_err(fe->dvb->device, 1305 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1306 __func__, c->delivery_system); 1307 return -EINVAL; 1308 case DVBV3_QPSK: 1309 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1310 p->u.qpsk.symbol_rate = c->symbol_rate; 1311 p->u.qpsk.fec_inner = c->fec_inner; 1312 break; 1313 case DVBV3_QAM: 1314 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1315 p->u.qam.symbol_rate = c->symbol_rate; 1316 p->u.qam.fec_inner = c->fec_inner; 1317 p->u.qam.modulation = c->modulation; 1318 break; 1319 case DVBV3_OFDM: 1320 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1321 switch (c->bandwidth_hz) { 1322 case 10000000: 1323 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ; 1324 break; 1325 case 8000000: 1326 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1327 break; 1328 case 7000000: 1329 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1330 break; 1331 case 6000000: 1332 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1333 break; 1334 case 5000000: 1335 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ; 1336 break; 1337 case 1712000: 1338 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ; 1339 break; 1340 case 0: 1341 default: 1342 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1343 } 1344 p->u.ofdm.code_rate_HP = c->code_rate_HP; 1345 p->u.ofdm.code_rate_LP = c->code_rate_LP; 1346 p->u.ofdm.constellation = c->modulation; 1347 p->u.ofdm.transmission_mode = c->transmission_mode; 1348 p->u.ofdm.guard_interval = c->guard_interval; 1349 p->u.ofdm.hierarchy_information = c->hierarchy; 1350 break; 1351 case DVBV3_ATSC: 1352 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__); 1353 p->u.vsb.modulation = c->modulation; 1354 break; 1355 } 1356 return 0; 1357} 1358 1359/** 1360 * dtv_get_frontend - calls a callback for retrieving DTV parameters 1361 * @fe: struct dvb_frontend pointer 1362 * @c: struct dtv_frontend_properties pointer (DVBv5 cache) 1363 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct) 1364 * 1365 * This routine calls either the DVBv3 or DVBv5 get_frontend call. 1366 * If c is not null, it will update the DVBv5 cache struct pointed by it. 1367 * If p_out is not null, it will update the DVBv3 params pointed by it. 1368 */ 1369static int dtv_get_frontend(struct dvb_frontend *fe, 1370 struct dvb_frontend_parameters *p_out) 1371{ 1372 int r; 1373 1374 if (fe->ops.get_frontend) { 1375 r = fe->ops.get_frontend(fe); 1376 if (unlikely(r < 0)) 1377 return r; 1378 if (p_out) 1379 dtv_property_legacy_params_sync(fe, p_out); 1380 return 0; 1381 } 1382 1383 /* As everything is in cache, get_frontend fops are always supported */ 1384 return 0; 1385} 1386 1387static int dvb_frontend_ioctl_legacy(struct file *file, 1388 unsigned int cmd, void *parg); 1389static int dvb_frontend_ioctl_properties(struct file *file, 1390 unsigned int cmd, void *parg); 1391 1392static int dtv_property_process_get(struct dvb_frontend *fe, 1393 const struct dtv_frontend_properties *c, 1394 struct dtv_property *tvp, 1395 struct file *file) 1396{ 1397 int r, ncaps; 1398 1399 switch(tvp->cmd) { 1400 case DTV_ENUM_DELSYS: 1401 ncaps = 0; 1402 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1403 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps]; 1404 ncaps++; 1405 } 1406 tvp->u.buffer.len = ncaps; 1407 break; 1408 case DTV_FREQUENCY: 1409 tvp->u.data = c->frequency; 1410 break; 1411 case DTV_MODULATION: 1412 tvp->u.data = c->modulation; 1413 break; 1414 case DTV_BANDWIDTH_HZ: 1415 tvp->u.data = c->bandwidth_hz; 1416 break; 1417 case DTV_INVERSION: 1418 tvp->u.data = c->inversion; 1419 break; 1420 case DTV_SYMBOL_RATE: 1421 tvp->u.data = c->symbol_rate; 1422 break; 1423 case DTV_INNER_FEC: 1424 tvp->u.data = c->fec_inner; 1425 break; 1426 case DTV_PILOT: 1427 tvp->u.data = c->pilot; 1428 break; 1429 case DTV_ROLLOFF: 1430 tvp->u.data = c->rolloff; 1431 break; 1432 case DTV_DELIVERY_SYSTEM: 1433 tvp->u.data = c->delivery_system; 1434 break; 1435 case DTV_VOLTAGE: 1436 tvp->u.data = c->voltage; 1437 break; 1438 case DTV_TONE: 1439 tvp->u.data = c->sectone; 1440 break; 1441 case DTV_API_VERSION: 1442 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; 1443 break; 1444 case DTV_CODE_RATE_HP: 1445 tvp->u.data = c->code_rate_HP; 1446 break; 1447 case DTV_CODE_RATE_LP: 1448 tvp->u.data = c->code_rate_LP; 1449 break; 1450 case DTV_GUARD_INTERVAL: 1451 tvp->u.data = c->guard_interval; 1452 break; 1453 case DTV_TRANSMISSION_MODE: 1454 tvp->u.data = c->transmission_mode; 1455 break; 1456 case DTV_HIERARCHY: 1457 tvp->u.data = c->hierarchy; 1458 break; 1459 case DTV_INTERLEAVING: 1460 tvp->u.data = c->interleaving; 1461 break; 1462 1463 /* ISDB-T Support here */ 1464 case DTV_ISDBT_PARTIAL_RECEPTION: 1465 tvp->u.data = c->isdbt_partial_reception; 1466 break; 1467 case DTV_ISDBT_SOUND_BROADCASTING: 1468 tvp->u.data = c->isdbt_sb_mode; 1469 break; 1470 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1471 tvp->u.data = c->isdbt_sb_subchannel; 1472 break; 1473 case DTV_ISDBT_SB_SEGMENT_IDX: 1474 tvp->u.data = c->isdbt_sb_segment_idx; 1475 break; 1476 case DTV_ISDBT_SB_SEGMENT_COUNT: 1477 tvp->u.data = c->isdbt_sb_segment_count; 1478 break; 1479 case DTV_ISDBT_LAYER_ENABLED: 1480 tvp->u.data = c->isdbt_layer_enabled; 1481 break; 1482 case DTV_ISDBT_LAYERA_FEC: 1483 tvp->u.data = c->layer[0].fec; 1484 break; 1485 case DTV_ISDBT_LAYERA_MODULATION: 1486 tvp->u.data = c->layer[0].modulation; 1487 break; 1488 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1489 tvp->u.data = c->layer[0].segment_count; 1490 break; 1491 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1492 tvp->u.data = c->layer[0].interleaving; 1493 break; 1494 case DTV_ISDBT_LAYERB_FEC: 1495 tvp->u.data = c->layer[1].fec; 1496 break; 1497 case DTV_ISDBT_LAYERB_MODULATION: 1498 tvp->u.data = c->layer[1].modulation; 1499 break; 1500 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1501 tvp->u.data = c->layer[1].segment_count; 1502 break; 1503 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1504 tvp->u.data = c->layer[1].interleaving; 1505 break; 1506 case DTV_ISDBT_LAYERC_FEC: 1507 tvp->u.data = c->layer[2].fec; 1508 break; 1509 case DTV_ISDBT_LAYERC_MODULATION: 1510 tvp->u.data = c->layer[2].modulation; 1511 break; 1512 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1513 tvp->u.data = c->layer[2].segment_count; 1514 break; 1515 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1516 tvp->u.data = c->layer[2].interleaving; 1517 break; 1518 1519 /* Multistream support */ 1520 case DTV_STREAM_ID: 1521 case DTV_DVBT2_PLP_ID_LEGACY: 1522 tvp->u.data = c->stream_id; 1523 break; 1524 1525 /* ATSC-MH */ 1526 case DTV_ATSCMH_FIC_VER: 1527 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver; 1528 break; 1529 case DTV_ATSCMH_PARADE_ID: 1530 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id; 1531 break; 1532 case DTV_ATSCMH_NOG: 1533 tvp->u.data = fe->dtv_property_cache.atscmh_nog; 1534 break; 1535 case DTV_ATSCMH_TNOG: 1536 tvp->u.data = fe->dtv_property_cache.atscmh_tnog; 1537 break; 1538 case DTV_ATSCMH_SGN: 1539 tvp->u.data = fe->dtv_property_cache.atscmh_sgn; 1540 break; 1541 case DTV_ATSCMH_PRC: 1542 tvp->u.data = fe->dtv_property_cache.atscmh_prc; 1543 break; 1544 case DTV_ATSCMH_RS_FRAME_MODE: 1545 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode; 1546 break; 1547 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1548 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble; 1549 break; 1550 case DTV_ATSCMH_RS_CODE_MODE_PRI: 1551 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri; 1552 break; 1553 case DTV_ATSCMH_RS_CODE_MODE_SEC: 1554 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec; 1555 break; 1556 case DTV_ATSCMH_SCCC_BLOCK_MODE: 1557 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode; 1558 break; 1559 case DTV_ATSCMH_SCCC_CODE_MODE_A: 1560 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a; 1561 break; 1562 case DTV_ATSCMH_SCCC_CODE_MODE_B: 1563 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b; 1564 break; 1565 case DTV_ATSCMH_SCCC_CODE_MODE_C: 1566 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c; 1567 break; 1568 case DTV_ATSCMH_SCCC_CODE_MODE_D: 1569 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d; 1570 break; 1571 1572 case DTV_LNA: 1573 tvp->u.data = c->lna; 1574 break; 1575 1576 /* Fill quality measures */ 1577 case DTV_STAT_SIGNAL_STRENGTH: 1578 tvp->u.st = c->strength; 1579 break; 1580 case DTV_STAT_CNR: 1581 tvp->u.st = c->cnr; 1582 break; 1583 case DTV_STAT_PRE_ERROR_BIT_COUNT: 1584 tvp->u.st = c->pre_bit_error; 1585 break; 1586 case DTV_STAT_PRE_TOTAL_BIT_COUNT: 1587 tvp->u.st = c->pre_bit_count; 1588 break; 1589 case DTV_STAT_POST_ERROR_BIT_COUNT: 1590 tvp->u.st = c->post_bit_error; 1591 break; 1592 case DTV_STAT_POST_TOTAL_BIT_COUNT: 1593 tvp->u.st = c->post_bit_count; 1594 break; 1595 case DTV_STAT_ERROR_BLOCK_COUNT: 1596 tvp->u.st = c->block_error; 1597 break; 1598 case DTV_STAT_TOTAL_BLOCK_COUNT: 1599 tvp->u.st = c->block_count; 1600 break; 1601 default: 1602 dev_dbg(fe->dvb->device, 1603 "%s: FE property %d doesn't exist\n", 1604 __func__, tvp->cmd); 1605 return -EINVAL; 1606 } 1607 1608 /* Allow the frontend to override outgoing properties */ 1609 if (fe->ops.get_property) { 1610 r = fe->ops.get_property(fe, tvp); 1611 if (r < 0) 1612 return r; 1613 } 1614 1615 dtv_property_dump(fe, tvp); 1616 1617 return 0; 1618} 1619 1620static int dtv_set_frontend(struct dvb_frontend *fe); 1621 1622static bool is_dvbv3_delsys(u32 delsys) 1623{ 1624 bool status; 1625 1626 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) || 1627 (delsys == SYS_DVBS) || (delsys == SYS_ATSC); 1628 1629 return status; 1630} 1631 1632/** 1633 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type 1634 * @fe: struct frontend; 1635 * @delsys: DVBv5 type that will be used for emulation 1636 * 1637 * Provides emulation for delivery systems that are compatible with the old 1638 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows 1639 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent 1640 * parameters are compatible with DVB-S spec. 1641 */ 1642static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys) 1643{ 1644 int i; 1645 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1646 1647 c->delivery_system = delsys; 1648 1649 /* 1650 * If the call is for ISDB-T, put it into full-seg, auto mode, TV 1651 */ 1652 if (c->delivery_system == SYS_ISDBT) { 1653 dev_dbg(fe->dvb->device, 1654 "%s: Using defaults for SYS_ISDBT\n", 1655 __func__); 1656 1657 if (!c->bandwidth_hz) 1658 c->bandwidth_hz = 6000000; 1659 1660 c->isdbt_partial_reception = 0; 1661 c->isdbt_sb_mode = 0; 1662 c->isdbt_sb_subchannel = 0; 1663 c->isdbt_sb_segment_idx = 0; 1664 c->isdbt_sb_segment_count = 0; 1665 c->isdbt_layer_enabled = 7; 1666 for (i = 0; i < 3; i++) { 1667 c->layer[i].fec = FEC_AUTO; 1668 c->layer[i].modulation = QAM_AUTO; 1669 c->layer[i].interleaving = 0; 1670 c->layer[i].segment_count = 0; 1671 } 1672 } 1673 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n", 1674 __func__, c->delivery_system); 1675 1676 return 0; 1677} 1678 1679/** 1680 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call 1681 * @fe: frontend struct 1682 * @desired_system: delivery system requested by the user 1683 * 1684 * A DVBv5 call know what's the desired system it wants. So, set it. 1685 * 1686 * There are, however, a few known issues with early DVBv5 applications that 1687 * are also handled by this logic: 1688 * 1689 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system. 1690 * This is an API violation, but, as we don't want to break userspace, 1691 * convert it to the first supported delivery system. 1692 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for 1693 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of 1694 * ISDB-T provided backward compat with DVB-T. 1695 */ 1696static int dvbv5_set_delivery_system(struct dvb_frontend *fe, 1697 u32 desired_system) 1698{ 1699 int ncaps; 1700 u32 delsys = SYS_UNDEFINED; 1701 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1702 enum dvbv3_emulation_type type; 1703 1704 /* 1705 * It was reported that some old DVBv5 applications were 1706 * filling delivery_system with SYS_UNDEFINED. If this happens, 1707 * assume that the application wants to use the first supported 1708 * delivery system. 1709 */ 1710 if (desired_system == SYS_UNDEFINED) 1711 desired_system = fe->ops.delsys[0]; 1712 1713 /* 1714 * This is a DVBv5 call. So, it likely knows the supported 1715 * delivery systems. So, check if the desired delivery system is 1716 * supported 1717 */ 1718 ncaps = 0; 1719 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1720 if (fe->ops.delsys[ncaps] == desired_system) { 1721 c->delivery_system = desired_system; 1722 dev_dbg(fe->dvb->device, 1723 "%s: Changing delivery system to %d\n", 1724 __func__, desired_system); 1725 return 0; 1726 } 1727 ncaps++; 1728 } 1729 1730 /* 1731 * The requested delivery system isn't supported. Maybe userspace 1732 * is requesting a DVBv3 compatible delivery system. 1733 * 1734 * The emulation only works if the desired system is one of the 1735 * delivery systems supported by DVBv3 API 1736 */ 1737 if (!is_dvbv3_delsys(desired_system)) { 1738 dev_dbg(fe->dvb->device, 1739 "%s: Delivery system %d not supported.\n", 1740 __func__, desired_system); 1741 return -EINVAL; 1742 } 1743 1744 type = dvbv3_type(desired_system); 1745 1746 /* 1747 * Get the last non-DVBv3 delivery system that has the same type 1748 * of the desired system 1749 */ 1750 ncaps = 0; 1751 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1752 if (dvbv3_type(fe->ops.delsys[ncaps]) == type) 1753 delsys = fe->ops.delsys[ncaps]; 1754 ncaps++; 1755 } 1756 1757 /* There's nothing compatible with the desired delivery system */ 1758 if (delsys == SYS_UNDEFINED) { 1759 dev_dbg(fe->dvb->device, 1760 "%s: Delivery system %d not supported on emulation mode.\n", 1761 __func__, desired_system); 1762 return -EINVAL; 1763 } 1764 1765 dev_dbg(fe->dvb->device, 1766 "%s: Using delivery system %d emulated as if it were %d\n", 1767 __func__, delsys, desired_system); 1768 1769 return emulate_delivery_system(fe, desired_system); 1770} 1771 1772/** 1773 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call 1774 * @fe: frontend struct 1775 * 1776 * A DVBv3 call doesn't know what's the desired system it wants. It also 1777 * doesn't allow to switch between different types. Due to that, userspace 1778 * should use DVBv5 instead. 1779 * However, in order to avoid breaking userspace API, limited backward 1780 * compatibility support is provided. 1781 * 1782 * There are some delivery systems that are incompatible with DVBv3 calls. 1783 * 1784 * This routine should work fine for frontends that support just one delivery 1785 * system. 1786 * 1787 * For frontends that support multiple frontends: 1788 * 1) It defaults to use the first supported delivery system. There's an 1789 * userspace application that allows changing it at runtime; 1790 * 1791 * 2) If the current delivery system is not compatible with DVBv3, it gets 1792 * the first one that it is compatible. 1793 * 1794 * NOTE: in order for this to work with applications like Kaffeine that 1795 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to 1796 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the 1797 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back 1798 * to DVB-S. 1799 */ 1800static int dvbv3_set_delivery_system(struct dvb_frontend *fe) 1801{ 1802 int ncaps; 1803 u32 delsys = SYS_UNDEFINED; 1804 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1805 1806 /* If not set yet, defaults to the first supported delivery system */ 1807 if (c->delivery_system == SYS_UNDEFINED) 1808 c->delivery_system = fe->ops.delsys[0]; 1809 1810 /* 1811 * Trivial case: just use the current one, if it already a DVBv3 1812 * delivery system 1813 */ 1814 if (is_dvbv3_delsys(c->delivery_system)) { 1815 dev_dbg(fe->dvb->device, 1816 "%s: Using delivery system to %d\n", 1817 __func__, c->delivery_system); 1818 return 0; 1819 } 1820 1821 /* 1822 * Seek for the first delivery system that it is compatible with a 1823 * DVBv3 standard 1824 */ 1825 ncaps = 0; 1826 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1827 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) { 1828 delsys = fe->ops.delsys[ncaps]; 1829 break; 1830 } 1831 ncaps++; 1832 } 1833 if (delsys == SYS_UNDEFINED) { 1834 dev_dbg(fe->dvb->device, 1835 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n", 1836 __func__); 1837 return -EINVAL; 1838 } 1839 return emulate_delivery_system(fe, delsys); 1840} 1841 1842static int dtv_property_process_set(struct dvb_frontend *fe, 1843 struct dtv_property *tvp, 1844 struct file *file) 1845{ 1846 int r = 0; 1847 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1848 1849 /* Allow the frontend to validate incoming properties */ 1850 if (fe->ops.set_property) { 1851 r = fe->ops.set_property(fe, tvp); 1852 if (r < 0) 1853 return r; 1854 } 1855 1856 switch(tvp->cmd) { 1857 case DTV_CLEAR: 1858 /* 1859 * Reset a cache of data specific to the frontend here. This does 1860 * not effect hardware. 1861 */ 1862 dvb_frontend_clear_cache(fe); 1863 break; 1864 case DTV_TUNE: 1865 /* interpret the cache of data, build either a traditional frontend 1866 * tunerequest so we can pass validation in the FE_SET_FRONTEND 1867 * ioctl. 1868 */ 1869 c->state = tvp->cmd; 1870 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n", 1871 __func__); 1872 1873 r = dtv_set_frontend(fe); 1874 break; 1875 case DTV_FREQUENCY: 1876 c->frequency = tvp->u.data; 1877 break; 1878 case DTV_MODULATION: 1879 c->modulation = tvp->u.data; 1880 break; 1881 case DTV_BANDWIDTH_HZ: 1882 c->bandwidth_hz = tvp->u.data; 1883 break; 1884 case DTV_INVERSION: 1885 c->inversion = tvp->u.data; 1886 break; 1887 case DTV_SYMBOL_RATE: 1888 c->symbol_rate = tvp->u.data; 1889 break; 1890 case DTV_INNER_FEC: 1891 c->fec_inner = tvp->u.data; 1892 break; 1893 case DTV_PILOT: 1894 c->pilot = tvp->u.data; 1895 break; 1896 case DTV_ROLLOFF: 1897 c->rolloff = tvp->u.data; 1898 break; 1899 case DTV_DELIVERY_SYSTEM: 1900 r = dvbv5_set_delivery_system(fe, tvp->u.data); 1901 break; 1902 case DTV_VOLTAGE: 1903 c->voltage = tvp->u.data; 1904 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE, 1905 (void *)c->voltage); 1906 break; 1907 case DTV_TONE: 1908 c->sectone = tvp->u.data; 1909 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE, 1910 (void *)c->sectone); 1911 break; 1912 case DTV_CODE_RATE_HP: 1913 c->code_rate_HP = tvp->u.data; 1914 break; 1915 case DTV_CODE_RATE_LP: 1916 c->code_rate_LP = tvp->u.data; 1917 break; 1918 case DTV_GUARD_INTERVAL: 1919 c->guard_interval = tvp->u.data; 1920 break; 1921 case DTV_TRANSMISSION_MODE: 1922 c->transmission_mode = tvp->u.data; 1923 break; 1924 case DTV_HIERARCHY: 1925 c->hierarchy = tvp->u.data; 1926 break; 1927 case DTV_INTERLEAVING: 1928 c->interleaving = tvp->u.data; 1929 break; 1930 1931 /* ISDB-T Support here */ 1932 case DTV_ISDBT_PARTIAL_RECEPTION: 1933 c->isdbt_partial_reception = tvp->u.data; 1934 break; 1935 case DTV_ISDBT_SOUND_BROADCASTING: 1936 c->isdbt_sb_mode = tvp->u.data; 1937 break; 1938 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1939 c->isdbt_sb_subchannel = tvp->u.data; 1940 break; 1941 case DTV_ISDBT_SB_SEGMENT_IDX: 1942 c->isdbt_sb_segment_idx = tvp->u.data; 1943 break; 1944 case DTV_ISDBT_SB_SEGMENT_COUNT: 1945 c->isdbt_sb_segment_count = tvp->u.data; 1946 break; 1947 case DTV_ISDBT_LAYER_ENABLED: 1948 c->isdbt_layer_enabled = tvp->u.data; 1949 break; 1950 case DTV_ISDBT_LAYERA_FEC: 1951 c->layer[0].fec = tvp->u.data; 1952 break; 1953 case DTV_ISDBT_LAYERA_MODULATION: 1954 c->layer[0].modulation = tvp->u.data; 1955 break; 1956 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1957 c->layer[0].segment_count = tvp->u.data; 1958 break; 1959 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1960 c->layer[0].interleaving = tvp->u.data; 1961 break; 1962 case DTV_ISDBT_LAYERB_FEC: 1963 c->layer[1].fec = tvp->u.data; 1964 break; 1965 case DTV_ISDBT_LAYERB_MODULATION: 1966 c->layer[1].modulation = tvp->u.data; 1967 break; 1968 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1969 c->layer[1].segment_count = tvp->u.data; 1970 break; 1971 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1972 c->layer[1].interleaving = tvp->u.data; 1973 break; 1974 case DTV_ISDBT_LAYERC_FEC: 1975 c->layer[2].fec = tvp->u.data; 1976 break; 1977 case DTV_ISDBT_LAYERC_MODULATION: 1978 c->layer[2].modulation = tvp->u.data; 1979 break; 1980 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1981 c->layer[2].segment_count = tvp->u.data; 1982 break; 1983 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1984 c->layer[2].interleaving = tvp->u.data; 1985 break; 1986 1987 /* Multistream support */ 1988 case DTV_STREAM_ID: 1989 case DTV_DVBT2_PLP_ID_LEGACY: 1990 c->stream_id = tvp->u.data; 1991 break; 1992 1993 /* ATSC-MH */ 1994 case DTV_ATSCMH_PARADE_ID: 1995 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data; 1996 break; 1997 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1998 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data; 1999 break; 2000 2001 case DTV_LNA: 2002 c->lna = tvp->u.data; 2003 if (fe->ops.set_lna) 2004 r = fe->ops.set_lna(fe); 2005 if (r < 0) 2006 c->lna = LNA_AUTO; 2007 break; 2008 2009 default: 2010 return -EINVAL; 2011 } 2012 2013 return r; 2014} 2015 2016static int dvb_frontend_ioctl(struct file *file, 2017 unsigned int cmd, void *parg) 2018{ 2019 struct dvb_device *dvbdev = file->private_data; 2020 struct dvb_frontend *fe = dvbdev->priv; 2021 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2022 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2023 int err = -EOPNOTSUPP; 2024 2025 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd)); 2026 if (down_interruptible(&fepriv->sem)) 2027 return -ERESTARTSYS; 2028 2029 if (fe->exit != DVB_FE_NO_EXIT) { 2030 up(&fepriv->sem); 2031 return -ENODEV; 2032 } 2033 2034 if ((file->f_flags & O_ACCMODE) == O_RDONLY && 2035 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || 2036 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) { 2037 up(&fepriv->sem); 2038 return -EPERM; 2039 } 2040 2041 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY)) 2042 err = dvb_frontend_ioctl_properties(file, cmd, parg); 2043 else { 2044 c->state = DTV_UNDEFINED; 2045 err = dvb_frontend_ioctl_legacy(file, cmd, parg); 2046 } 2047 2048 up(&fepriv->sem); 2049 return err; 2050} 2051 2052static int dvb_frontend_ioctl_properties(struct file *file, 2053 unsigned int cmd, void *parg) 2054{ 2055 struct dvb_device *dvbdev = file->private_data; 2056 struct dvb_frontend *fe = dvbdev->priv; 2057 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2058 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2059 int err = 0; 2060 2061 struct dtv_properties *tvps = parg; 2062 struct dtv_property *tvp = NULL; 2063 int i; 2064 2065 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2066 2067 if (cmd == FE_SET_PROPERTY) { 2068 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); 2069 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props); 2070 2071 /* Put an arbitrary limit on the number of messages that can 2072 * be sent at once */ 2073 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2074 return -EINVAL; 2075 2076 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 2077 if (!tvp) { 2078 err = -ENOMEM; 2079 goto out; 2080 } 2081 2082 if (copy_from_user(tvp, (void __user *)tvps->props, 2083 tvps->num * sizeof(struct dtv_property))) { 2084 err = -EFAULT; 2085 goto out; 2086 } 2087 2088 for (i = 0; i < tvps->num; i++) { 2089 err = dtv_property_process_set(fe, tvp + i, file); 2090 if (err < 0) 2091 goto out; 2092 (tvp + i)->result = err; 2093 } 2094 2095 if (c->state == DTV_TUNE) 2096 dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__); 2097 2098 } else if (cmd == FE_GET_PROPERTY) { 2099 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); 2100 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props); 2101 2102 /* Put an arbitrary limit on the number of messages that can 2103 * be sent at once */ 2104 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2105 return -EINVAL; 2106 2107 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 2108 if (!tvp) { 2109 err = -ENOMEM; 2110 goto out; 2111 } 2112 2113 if (copy_from_user(tvp, (void __user *)tvps->props, 2114 tvps->num * sizeof(struct dtv_property))) { 2115 err = -EFAULT; 2116 goto out; 2117 } 2118 2119 /* 2120 * Fills the cache out struct with the cache contents, plus 2121 * the data retrieved from get_frontend, if the frontend 2122 * is not idle. Otherwise, returns the cached content 2123 */ 2124 if (fepriv->state != FESTATE_IDLE) { 2125 err = dtv_get_frontend(fe, NULL); 2126 if (err < 0) 2127 goto out; 2128 } 2129 for (i = 0; i < tvps->num; i++) { 2130 err = dtv_property_process_get(fe, c, tvp + i, file); 2131 if (err < 0) 2132 goto out; 2133 (tvp + i)->result = err; 2134 } 2135 2136 if (copy_to_user((void __user *)tvps->props, tvp, 2137 tvps->num * sizeof(struct dtv_property))) { 2138 err = -EFAULT; 2139 goto out; 2140 } 2141 2142 } else 2143 err = -EOPNOTSUPP; 2144 2145out: 2146 kfree(tvp); 2147 return err; 2148} 2149 2150static int dtv_set_frontend(struct dvb_frontend *fe) 2151{ 2152 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2153 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2154 struct dvb_frontend_tune_settings fetunesettings; 2155 u32 rolloff = 0; 2156 2157 if (dvb_frontend_check_parameters(fe) < 0) 2158 return -EINVAL; 2159 2160 /* 2161 * Initialize output parameters to match the values given by 2162 * the user. FE_SET_FRONTEND triggers an initial frontend event 2163 * with status = 0, which copies output parameters to userspace. 2164 */ 2165 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); 2166 2167 /* 2168 * Be sure that the bandwidth will be filled for all 2169 * non-satellite systems, as tuners need to know what 2170 * low pass/Nyquist half filter should be applied, in 2171 * order to avoid inter-channel noise. 2172 * 2173 * ISDB-T and DVB-T/T2 already sets bandwidth. 2174 * ATSC and DVB-C don't set, so, the core should fill it. 2175 * 2176 * On DVB-C Annex A and C, the bandwidth is a function of 2177 * the roll-off and symbol rate. Annex B defines different 2178 * roll-off factors depending on the modulation. Fortunately, 2179 * Annex B is only used with 6MHz, so there's no need to 2180 * calculate it. 2181 * 2182 * While not officially supported, a side effect of handling it at 2183 * the cache level is that a program could retrieve the bandwidth 2184 * via DTV_BANDWIDTH_HZ, which may be useful for test programs. 2185 */ 2186 switch (c->delivery_system) { 2187 case SYS_ATSC: 2188 case SYS_DVBC_ANNEX_B: 2189 c->bandwidth_hz = 6000000; 2190 break; 2191 case SYS_DVBC_ANNEX_A: 2192 rolloff = 115; 2193 break; 2194 case SYS_DVBC_ANNEX_C: 2195 rolloff = 113; 2196 break; 2197 case SYS_DVBS: 2198 case SYS_TURBO: 2199 case SYS_ISDBS: 2200 rolloff = 135; 2201 break; 2202 case SYS_DVBS2: 2203 switch (c->rolloff) { 2204 case ROLLOFF_20: 2205 rolloff = 120; 2206 break; 2207 case ROLLOFF_25: 2208 rolloff = 125; 2209 break; 2210 default: 2211 case ROLLOFF_35: 2212 rolloff = 135; 2213 } 2214 break; 2215 default: 2216 break; 2217 } 2218 if (rolloff) 2219 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100; 2220 2221 /* force auto frequency inversion if requested */ 2222 if (dvb_force_auto_inversion) 2223 c->inversion = INVERSION_AUTO; 2224 2225 /* 2226 * without hierarchical coding code_rate_LP is irrelevant, 2227 * so we tolerate the otherwise invalid FEC_NONE setting 2228 */ 2229 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE) 2230 c->code_rate_LP = FEC_AUTO; 2231 2232 /* get frontend-specific tuning settings */ 2233 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); 2234 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { 2235 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; 2236 fepriv->max_drift = fetunesettings.max_drift; 2237 fepriv->step_size = fetunesettings.step_size; 2238 } else { 2239 /* default values */ 2240 switch (c->delivery_system) { 2241 case SYS_DVBS: 2242 case SYS_DVBS2: 2243 case SYS_ISDBS: 2244 case SYS_TURBO: 2245 case SYS_DVBC_ANNEX_A: 2246 case SYS_DVBC_ANNEX_C: 2247 fepriv->min_delay = HZ / 20; 2248 fepriv->step_size = c->symbol_rate / 16000; 2249 fepriv->max_drift = c->symbol_rate / 2000; 2250 break; 2251 case SYS_DVBT: 2252 case SYS_DVBT2: 2253 case SYS_ISDBT: 2254 case SYS_DTMB: 2255 fepriv->min_delay = HZ / 20; 2256 fepriv->step_size = fe->ops.info.frequency_stepsize * 2; 2257 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; 2258 break; 2259 default: 2260 /* 2261 * FIXME: This sounds wrong! if freqency_stepsize is 2262 * defined by the frontend, why not use it??? 2263 */ 2264 fepriv->min_delay = HZ / 20; 2265 fepriv->step_size = 0; /* no zigzag */ 2266 fepriv->max_drift = 0; 2267 break; 2268 } 2269 } 2270 if (dvb_override_tune_delay > 0) 2271 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; 2272 2273 fepriv->state = FESTATE_RETUNE; 2274 2275 /* Request the search algorithm to search */ 2276 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 2277 2278 dvb_frontend_clear_events(fe); 2279 dvb_frontend_add_event(fe, 0); 2280 dvb_frontend_wakeup(fe); 2281 fepriv->status = 0; 2282 2283 return 0; 2284} 2285 2286 2287static int dvb_frontend_ioctl_legacy(struct file *file, 2288 unsigned int cmd, void *parg) 2289{ 2290 struct dvb_device *dvbdev = file->private_data; 2291 struct dvb_frontend *fe = dvbdev->priv; 2292 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2293 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2294 int err = -EOPNOTSUPP; 2295 2296 switch (cmd) { 2297 case FE_GET_INFO: { 2298 struct dvb_frontend_info* info = parg; 2299 2300 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); 2301 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max); 2302 2303 /* 2304 * Associate the 4 delivery systems supported by DVBv3 2305 * API with their DVBv5 counterpart. For the other standards, 2306 * use the closest type, assuming that it would hopefully 2307 * work with a DVBv3 application. 2308 * It should be noticed that, on multi-frontend devices with 2309 * different types (terrestrial and cable, for example), 2310 * a pure DVBv3 application won't be able to use all delivery 2311 * systems. Yet, changing the DVBv5 cache to the other delivery 2312 * system should be enough for making it work. 2313 */ 2314 switch (dvbv3_type(c->delivery_system)) { 2315 case DVBV3_QPSK: 2316 info->type = FE_QPSK; 2317 break; 2318 case DVBV3_ATSC: 2319 info->type = FE_ATSC; 2320 break; 2321 case DVBV3_QAM: 2322 info->type = FE_QAM; 2323 break; 2324 case DVBV3_OFDM: 2325 info->type = FE_OFDM; 2326 break; 2327 default: 2328 dev_err(fe->dvb->device, 2329 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 2330 __func__, c->delivery_system); 2331 fe->ops.info.type = FE_OFDM; 2332 } 2333 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n", 2334 __func__, c->delivery_system, fe->ops.info.type); 2335 2336 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */ 2337 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) 2338 info->caps |= FE_CAN_INVERSION_AUTO; 2339 err = 0; 2340 break; 2341 } 2342 2343 case FE_READ_STATUS: { 2344 fe_status_t* status = parg; 2345 2346 /* if retune was requested but hasn't occurred yet, prevent 2347 * that user get signal state from previous tuning */ 2348 if (fepriv->state == FESTATE_RETUNE || 2349 fepriv->state == FESTATE_ERROR) { 2350 err=0; 2351 *status = 0; 2352 break; 2353 } 2354 2355 if (fe->ops.read_status) 2356 err = fe->ops.read_status(fe, status); 2357 break; 2358 } 2359 2360 case FE_READ_BER: 2361 if (fe->ops.read_ber) { 2362 if (fepriv->thread) 2363 err = fe->ops.read_ber(fe, (__u32 *) parg); 2364 else 2365 err = -EAGAIN; 2366 } 2367 break; 2368 2369 case FE_READ_SIGNAL_STRENGTH: 2370 if (fe->ops.read_signal_strength) { 2371 if (fepriv->thread) 2372 err = fe->ops.read_signal_strength(fe, (__u16 *) parg); 2373 else 2374 err = -EAGAIN; 2375 } 2376 break; 2377 2378 case FE_READ_SNR: 2379 if (fe->ops.read_snr) { 2380 if (fepriv->thread) 2381 err = fe->ops.read_snr(fe, (__u16 *) parg); 2382 else 2383 err = -EAGAIN; 2384 } 2385 break; 2386 2387 case FE_READ_UNCORRECTED_BLOCKS: 2388 if (fe->ops.read_ucblocks) { 2389 if (fepriv->thread) 2390 err = fe->ops.read_ucblocks(fe, (__u32 *) parg); 2391 else 2392 err = -EAGAIN; 2393 } 2394 break; 2395 2396 case FE_DISEQC_RESET_OVERLOAD: 2397 if (fe->ops.diseqc_reset_overload) { 2398 err = fe->ops.diseqc_reset_overload(fe); 2399 fepriv->state = FESTATE_DISEQC; 2400 fepriv->status = 0; 2401 } 2402 break; 2403 2404 case FE_DISEQC_SEND_MASTER_CMD: 2405 if (fe->ops.diseqc_send_master_cmd) { 2406 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); 2407 fepriv->state = FESTATE_DISEQC; 2408 fepriv->status = 0; 2409 } 2410 break; 2411 2412 case FE_DISEQC_SEND_BURST: 2413 if (fe->ops.diseqc_send_burst) { 2414 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); 2415 fepriv->state = FESTATE_DISEQC; 2416 fepriv->status = 0; 2417 } 2418 break; 2419 2420 case FE_SET_TONE: 2421 if (fe->ops.set_tone) { 2422 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); 2423 fepriv->tone = (fe_sec_tone_mode_t) parg; 2424 fepriv->state = FESTATE_DISEQC; 2425 fepriv->status = 0; 2426 } 2427 break; 2428 2429 case FE_SET_VOLTAGE: 2430 if (fe->ops.set_voltage) { 2431 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); 2432 fepriv->voltage = (fe_sec_voltage_t) parg; 2433 fepriv->state = FESTATE_DISEQC; 2434 fepriv->status = 0; 2435 } 2436 break; 2437 2438 case FE_DISHNETWORK_SEND_LEGACY_CMD: 2439 if (fe->ops.dishnetwork_send_legacy_command) { 2440 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); 2441 fepriv->state = FESTATE_DISEQC; 2442 fepriv->status = 0; 2443 } else if (fe->ops.set_voltage) { 2444 /* 2445 * NOTE: This is a fallback condition. Some frontends 2446 * (stv0299 for instance) take longer than 8msec to 2447 * respond to a set_voltage command. Those switches 2448 * need custom routines to switch properly. For all 2449 * other frontends, the following should work ok. 2450 * Dish network legacy switches (as used by Dish500) 2451 * are controlled by sending 9-bit command words 2452 * spaced 8msec apart. 2453 * the actual command word is switch/port dependent 2454 * so it is up to the userspace application to send 2455 * the right command. 2456 * The command must always start with a '0' after 2457 * initialization, so parg is 8 bits and does not 2458 * include the initialization or start bit 2459 */ 2460 unsigned long swcmd = ((unsigned long) parg) << 1; 2461 struct timeval nexttime; 2462 struct timeval tv[10]; 2463 int i; 2464 u8 last = 1; 2465 if (dvb_frontend_debug) 2466 printk("%s switch command: 0x%04lx\n", __func__, swcmd); 2467 do_gettimeofday(&nexttime); 2468 if (dvb_frontend_debug) 2469 tv[0] = nexttime; 2470 /* before sending a command, initialize by sending 2471 * a 32ms 18V to the switch 2472 */ 2473 fe->ops.set_voltage(fe, SEC_VOLTAGE_18); 2474 dvb_frontend_sleep_until(&nexttime, 32000); 2475 2476 for (i = 0; i < 9; i++) { 2477 if (dvb_frontend_debug) 2478 do_gettimeofday(&tv[i + 1]); 2479 if ((swcmd & 0x01) != last) { 2480 /* set voltage to (last ? 13V : 18V) */ 2481 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); 2482 last = (last) ? 0 : 1; 2483 } 2484 swcmd = swcmd >> 1; 2485 if (i != 8) 2486 dvb_frontend_sleep_until(&nexttime, 8000); 2487 } 2488 if (dvb_frontend_debug) { 2489 printk("%s(%d): switch delay (should be 32k followed by all 8k\n", 2490 __func__, fe->dvb->num); 2491 for (i = 1; i < 10; i++) 2492 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); 2493 } 2494 err = 0; 2495 fepriv->state = FESTATE_DISEQC; 2496 fepriv->status = 0; 2497 } 2498 break; 2499 2500 case FE_DISEQC_RECV_SLAVE_REPLY: 2501 if (fe->ops.diseqc_recv_slave_reply) 2502 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); 2503 break; 2504 2505 case FE_ENABLE_HIGH_LNB_VOLTAGE: 2506 if (fe->ops.enable_high_lnb_voltage) 2507 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); 2508 break; 2509 2510 case FE_SET_FRONTEND: 2511 err = dvbv3_set_delivery_system(fe); 2512 if (err) 2513 break; 2514 2515 err = dtv_property_cache_sync(fe, c, parg); 2516 if (err) 2517 break; 2518 err = dtv_set_frontend(fe); 2519 break; 2520 case FE_GET_EVENT: 2521 err = dvb_frontend_get_event (fe, parg, file->f_flags); 2522 break; 2523 2524 case FE_GET_FRONTEND: 2525 err = dtv_get_frontend(fe, parg); 2526 break; 2527 2528 case FE_SET_FRONTEND_TUNE_MODE: 2529 fepriv->tune_mode_flags = (unsigned long) parg; 2530 err = 0; 2531 break; 2532 } 2533 2534 return err; 2535} 2536 2537 2538static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) 2539{ 2540 struct dvb_device *dvbdev = file->private_data; 2541 struct dvb_frontend *fe = dvbdev->priv; 2542 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2543 2544 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__); 2545 2546 poll_wait (file, &fepriv->events.wait_queue, wait); 2547 2548 if (fepriv->events.eventw != fepriv->events.eventr) 2549 return (POLLIN | POLLRDNORM | POLLPRI); 2550 2551 return 0; 2552} 2553 2554static int dvb_frontend_open(struct inode *inode, struct file *file) 2555{ 2556 struct dvb_device *dvbdev = file->private_data; 2557 struct dvb_frontend *fe = dvbdev->priv; 2558 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2559 struct dvb_adapter *adapter = fe->dvb; 2560 int ret; 2561 2562 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2563 if (fe->exit == DVB_FE_DEVICE_REMOVED) 2564 return -ENODEV; 2565 2566 if (adapter->mfe_shared) { 2567 mutex_lock (&adapter->mfe_lock); 2568 2569 if (adapter->mfe_dvbdev == NULL) 2570 adapter->mfe_dvbdev = dvbdev; 2571 2572 else if (adapter->mfe_dvbdev != dvbdev) { 2573 struct dvb_device 2574 *mfedev = adapter->mfe_dvbdev; 2575 struct dvb_frontend 2576 *mfe = mfedev->priv; 2577 struct dvb_frontend_private 2578 *mfepriv = mfe->frontend_priv; 2579 int mferetry = (dvb_mfe_wait_time << 1); 2580 2581 mutex_unlock (&adapter->mfe_lock); 2582 while (mferetry-- && (mfedev->users != -1 || 2583 mfepriv->thread != NULL)) { 2584 if(msleep_interruptible(500)) { 2585 if(signal_pending(current)) 2586 return -EINTR; 2587 } 2588 } 2589 2590 mutex_lock (&adapter->mfe_lock); 2591 if(adapter->mfe_dvbdev != dvbdev) { 2592 mfedev = adapter->mfe_dvbdev; 2593 mfe = mfedev->priv; 2594 mfepriv = mfe->frontend_priv; 2595 if (mfedev->users != -1 || 2596 mfepriv->thread != NULL) { 2597 mutex_unlock (&adapter->mfe_lock); 2598 return -EBUSY; 2599 } 2600 adapter->mfe_dvbdev = dvbdev; 2601 } 2602 } 2603 } 2604 2605 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { 2606 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) 2607 goto err0; 2608 2609 /* If we took control of the bus, we need to force 2610 reinitialization. This is because many ts_bus_ctrl() 2611 functions strobe the RESET pin on the demod, and if the 2612 frontend thread already exists then the dvb_init() routine 2613 won't get called (which is what usually does initial 2614 register configuration). */ 2615 fepriv->reinitialise = 1; 2616 } 2617 2618 if ((ret = dvb_generic_open (inode, file)) < 0) 2619 goto err1; 2620 2621 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2622 /* normal tune mode when opened R/W */ 2623 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; 2624 fepriv->tone = -1; 2625 fepriv->voltage = -1; 2626 2627 ret = dvb_frontend_start (fe); 2628 if (ret) 2629 goto err2; 2630 2631 /* empty event queue */ 2632 fepriv->events.eventr = fepriv->events.eventw = 0; 2633 } 2634 2635 if (adapter->mfe_shared) 2636 mutex_unlock (&adapter->mfe_lock); 2637 return ret; 2638 2639err2: 2640 dvb_generic_release(inode, file); 2641err1: 2642 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) 2643 fe->ops.ts_bus_ctrl(fe, 0); 2644err0: 2645 if (adapter->mfe_shared) 2646 mutex_unlock (&adapter->mfe_lock); 2647 return ret; 2648} 2649 2650static int dvb_frontend_release(struct inode *inode, struct file *file) 2651{ 2652 struct dvb_device *dvbdev = file->private_data; 2653 struct dvb_frontend *fe = dvbdev->priv; 2654 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2655 int ret; 2656 2657 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2658 2659 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2660 fepriv->release_jiffies = jiffies; 2661 mb(); 2662 } 2663 2664 ret = dvb_generic_release (inode, file); 2665 2666 if (dvbdev->users == -1) { 2667 wake_up(&fepriv->wait_queue); 2668 if (fe->exit != DVB_FE_NO_EXIT) 2669 wake_up(&dvbdev->wait_queue); 2670 if (fe->ops.ts_bus_ctrl) 2671 fe->ops.ts_bus_ctrl(fe, 0); 2672 } 2673 2674 return ret; 2675} 2676 2677static const struct file_operations dvb_frontend_fops = { 2678 .owner = THIS_MODULE, 2679 .unlocked_ioctl = dvb_generic_ioctl, 2680 .poll = dvb_frontend_poll, 2681 .open = dvb_frontend_open, 2682 .release = dvb_frontend_release, 2683 .llseek = noop_llseek, 2684}; 2685 2686int dvb_frontend_suspend(struct dvb_frontend *fe) 2687{ 2688 int ret = 0; 2689 2690 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2691 fe->id); 2692 2693 if (fe->ops.tuner_ops.suspend) 2694 ret = fe->ops.tuner_ops.suspend(fe); 2695 else if (fe->ops.tuner_ops.sleep) 2696 ret = fe->ops.tuner_ops.sleep(fe); 2697 2698 if (fe->ops.sleep) 2699 ret = fe->ops.sleep(fe); 2700 2701 return ret; 2702} 2703EXPORT_SYMBOL(dvb_frontend_suspend); 2704 2705int dvb_frontend_resume(struct dvb_frontend *fe) 2706{ 2707 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2708 int ret = 0; 2709 2710 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2711 fe->id); 2712 2713 fe->exit = DVB_FE_DEVICE_RESUME; 2714 if (fe->ops.init) 2715 ret = fe->ops.init(fe); 2716 2717 if (fe->ops.tuner_ops.resume) 2718 ret = fe->ops.tuner_ops.resume(fe); 2719 else if (fe->ops.tuner_ops.init) 2720 ret = fe->ops.tuner_ops.init(fe); 2721 2722 fe->exit = DVB_FE_NO_EXIT; 2723 fepriv->state = FESTATE_RETUNE; 2724 dvb_frontend_wakeup(fe); 2725 2726 return ret; 2727} 2728EXPORT_SYMBOL(dvb_frontend_resume); 2729 2730int dvb_register_frontend(struct dvb_adapter* dvb, 2731 struct dvb_frontend* fe) 2732{ 2733 struct dvb_frontend_private *fepriv; 2734 const struct dvb_device dvbdev_template = { 2735 .users = ~0, 2736 .writers = 1, 2737 .readers = (~0)-1, 2738 .fops = &dvb_frontend_fops, 2739#if defined(CONFIG_MEDIA_CONTROLLER_DVB) 2740 .name = fe->ops.info.name, 2741#endif 2742 .kernel_ioctl = dvb_frontend_ioctl 2743 }; 2744 2745 dev_dbg(dvb->device, "%s:\n", __func__); 2746 2747 if (mutex_lock_interruptible(&frontend_mutex)) 2748 return -ERESTARTSYS; 2749 2750 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); 2751 if (fe->frontend_priv == NULL) { 2752 mutex_unlock(&frontend_mutex); 2753 return -ENOMEM; 2754 } 2755 fepriv = fe->frontend_priv; 2756 2757 sema_init(&fepriv->sem, 1); 2758 init_waitqueue_head (&fepriv->wait_queue); 2759 init_waitqueue_head (&fepriv->events.wait_queue); 2760 mutex_init(&fepriv->events.mtx); 2761 fe->dvb = dvb; 2762 fepriv->inversion = INVERSION_OFF; 2763 2764 dev_info(fe->dvb->device, 2765 "DVB: registering adapter %i frontend %i (%s)...\n", 2766 fe->dvb->num, fe->id, fe->ops.info.name); 2767 2768 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, 2769 fe, DVB_DEVICE_FRONTEND); 2770 2771 /* 2772 * Initialize the cache to the proper values according with the 2773 * first supported delivery system (ops->delsys[0]) 2774 */ 2775 2776 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0]; 2777 dvb_frontend_clear_cache(fe); 2778 2779 mutex_unlock(&frontend_mutex); 2780 return 0; 2781} 2782EXPORT_SYMBOL(dvb_register_frontend); 2783 2784int dvb_unregister_frontend(struct dvb_frontend* fe) 2785{ 2786 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2787 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2788 2789 mutex_lock(&frontend_mutex); 2790 dvb_frontend_stop (fe); 2791 mutex_unlock(&frontend_mutex); 2792 2793 if (fepriv->dvbdev->users < -1) 2794 wait_event(fepriv->dvbdev->wait_queue, 2795 fepriv->dvbdev->users==-1); 2796 2797 mutex_lock(&frontend_mutex); 2798 dvb_unregister_device (fepriv->dvbdev); 2799 2800 /* fe is invalid now */ 2801 kfree(fepriv); 2802 mutex_unlock(&frontend_mutex); 2803 return 0; 2804} 2805EXPORT_SYMBOL(dvb_unregister_frontend); 2806 2807#ifdef CONFIG_MEDIA_ATTACH 2808void dvb_frontend_detach(struct dvb_frontend* fe) 2809{ 2810 void *ptr; 2811 2812 if (fe->ops.release_sec) { 2813 fe->ops.release_sec(fe); 2814 dvb_detach(fe->ops.release_sec); 2815 } 2816 if (fe->ops.tuner_ops.release) { 2817 fe->ops.tuner_ops.release(fe); 2818 dvb_detach(fe->ops.tuner_ops.release); 2819 } 2820 if (fe->ops.analog_ops.release) { 2821 fe->ops.analog_ops.release(fe); 2822 dvb_detach(fe->ops.analog_ops.release); 2823 } 2824 ptr = (void*)fe->ops.release; 2825 if (ptr) { 2826 fe->ops.release(fe); 2827 dvb_detach(ptr); 2828 } 2829} 2830#else 2831void dvb_frontend_detach(struct dvb_frontend* fe) 2832{ 2833 if (fe->ops.release_sec) 2834 fe->ops.release_sec(fe); 2835 if (fe->ops.tuner_ops.release) 2836 fe->ops.tuner_ops.release(fe); 2837 if (fe->ops.analog_ops.release) 2838 fe->ops.analog_ops.release(fe); 2839 if (fe->ops.release) 2840 fe->ops.release(fe); 2841} 2842#endif 2843EXPORT_SYMBOL(dvb_frontend_detach); 2844