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 dprintk if (dvb_frontend_debug) printk 70 71#define FESTATE_IDLE 1 72#define FESTATE_RETUNE 2 73#define FESTATE_TUNING_FAST 4 74#define FESTATE_TUNING_SLOW 8 75#define FESTATE_TUNED 16 76#define FESTATE_ZIGZAG_FAST 32 77#define FESTATE_ZIGZAG_SLOW 64 78#define FESTATE_DISEQC 128 79#define FESTATE_ERROR 256 80#define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) 81#define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) 82#define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) 83#define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) 84 85#define FE_ALGO_HW 1 86/* 87 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. 88 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. 89 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. 90 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. 91 * FESTATE_TUNED. The frontend has successfully locked on. 92 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. 93 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. 94 * FESTATE_DISEQC. A DISEQC command has just been issued. 95 * FESTATE_WAITFORLOCK. When we're waiting for a lock. 96 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. 97 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. 98 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. 99 */ 100 101#define DVB_FE_NO_EXIT 0 102#define DVB_FE_NORMAL_EXIT 1 103#define DVB_FE_DEVICE_REMOVED 2 104 105static DEFINE_MUTEX(frontend_mutex); 106 107struct dvb_frontend_private { 108 109 /* thread/frontend values */ 110 struct dvb_device *dvbdev; 111 struct dvb_frontend_parameters parameters_out; 112 struct dvb_fe_events events; 113 struct semaphore sem; 114 struct list_head list_head; 115 wait_queue_head_t wait_queue; 116 struct task_struct *thread; 117 unsigned long release_jiffies; 118 unsigned int exit; 119 unsigned int wakeup; 120 fe_status_t status; 121 unsigned long tune_mode_flags; 122 unsigned int delay; 123 unsigned int reinitialise; 124 int tone; 125 int voltage; 126 127 /* swzigzag values */ 128 unsigned int state; 129 unsigned int bending; 130 int lnb_drift; 131 unsigned int inversion; 132 unsigned int auto_step; 133 unsigned int auto_sub_step; 134 unsigned int started_auto_step; 135 unsigned int min_delay; 136 unsigned int max_drift; 137 unsigned int step_size; 138 int quality; 139 unsigned int check_wrapped; 140 enum dvbfe_search algo_status; 141}; 142 143static void dvb_frontend_wakeup(struct dvb_frontend *fe); 144static int dtv_get_frontend(struct dvb_frontend *fe, 145 struct dvb_frontend_parameters *p_out); 146static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, 147 struct dvb_frontend_parameters *p); 148 149static bool has_get_frontend(struct dvb_frontend *fe) 150{ 151 return fe->ops.get_frontend != NULL; 152} 153 154/* 155 * Due to DVBv3 API calls, a delivery system should be mapped into one of 156 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC), 157 * otherwise, a DVBv3 call will fail. 158 */ 159enum dvbv3_emulation_type { 160 DVBV3_UNKNOWN, 161 DVBV3_QPSK, 162 DVBV3_QAM, 163 DVBV3_OFDM, 164 DVBV3_ATSC, 165}; 166 167static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system) 168{ 169 switch (delivery_system) { 170 case SYS_DVBC_ANNEX_A: 171 case SYS_DVBC_ANNEX_C: 172 return DVBV3_QAM; 173 case SYS_DVBS: 174 case SYS_DVBS2: 175 case SYS_TURBO: 176 case SYS_ISDBS: 177 case SYS_DSS: 178 return DVBV3_QPSK; 179 case SYS_DVBT: 180 case SYS_DVBT2: 181 case SYS_ISDBT: 182 case SYS_DMBTH: 183 return DVBV3_OFDM; 184 case SYS_ATSC: 185 case SYS_DVBC_ANNEX_B: 186 return DVBV3_ATSC; 187 case SYS_UNDEFINED: 188 case SYS_ISDBC: 189 case SYS_DVBH: 190 case SYS_DAB: 191 case SYS_ATSCMH: 192 default: 193 /* 194 * Doesn't know how to emulate those types and/or 195 * there's no frontend driver from this type yet 196 * with some emulation code, so, we're not sure yet how 197 * to handle them, or they're not compatible with a DVBv3 call. 198 */ 199 return DVBV3_UNKNOWN; 200 } 201} 202 203static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) 204{ 205 struct dvb_frontend_private *fepriv = fe->frontend_priv; 206 struct dvb_fe_events *events = &fepriv->events; 207 struct dvb_frontend_event *e; 208 int wp; 209 210 dprintk ("%s\n", __func__); 211 212 if ((status & FE_HAS_LOCK) && has_get_frontend(fe)) 213 dtv_get_frontend(fe, &fepriv->parameters_out); 214 215 mutex_lock(&events->mtx); 216 217 wp = (events->eventw + 1) % MAX_EVENT; 218 if (wp == events->eventr) { 219 events->overflow = 1; 220 events->eventr = (events->eventr + 1) % MAX_EVENT; 221 } 222 223 e = &events->events[events->eventw]; 224 e->status = status; 225 e->parameters = fepriv->parameters_out; 226 227 events->eventw = wp; 228 229 mutex_unlock(&events->mtx); 230 231 wake_up_interruptible (&events->wait_queue); 232} 233 234static int dvb_frontend_get_event(struct dvb_frontend *fe, 235 struct dvb_frontend_event *event, int flags) 236{ 237 struct dvb_frontend_private *fepriv = fe->frontend_priv; 238 struct dvb_fe_events *events = &fepriv->events; 239 240 dprintk ("%s\n", __func__); 241 242 if (events->overflow) { 243 events->overflow = 0; 244 return -EOVERFLOW; 245 } 246 247 if (events->eventw == events->eventr) { 248 int ret; 249 250 if (flags & O_NONBLOCK) 251 return -EWOULDBLOCK; 252 253 up(&fepriv->sem); 254 255 ret = wait_event_interruptible (events->wait_queue, 256 events->eventw != events->eventr); 257 258 if (down_interruptible (&fepriv->sem)) 259 return -ERESTARTSYS; 260 261 if (ret < 0) 262 return ret; 263 } 264 265 mutex_lock(&events->mtx); 266 *event = events->events[events->eventr]; 267 events->eventr = (events->eventr + 1) % MAX_EVENT; 268 mutex_unlock(&events->mtx); 269 270 return 0; 271} 272 273static void dvb_frontend_clear_events(struct dvb_frontend *fe) 274{ 275 struct dvb_frontend_private *fepriv = fe->frontend_priv; 276 struct dvb_fe_events *events = &fepriv->events; 277 278 mutex_lock(&events->mtx); 279 events->eventr = events->eventw; 280 mutex_unlock(&events->mtx); 281} 282 283static void dvb_frontend_init(struct dvb_frontend *fe) 284{ 285 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n", 286 fe->dvb->num, 287 fe->id, 288 fe->ops.info.name); 289 290 if (fe->ops.init) 291 fe->ops.init(fe); 292 if (fe->ops.tuner_ops.init) { 293 if (fe->ops.i2c_gate_ctrl) 294 fe->ops.i2c_gate_ctrl(fe, 1); 295 fe->ops.tuner_ops.init(fe); 296 if (fe->ops.i2c_gate_ctrl) 297 fe->ops.i2c_gate_ctrl(fe, 0); 298 } 299} 300 301void dvb_frontend_reinitialise(struct dvb_frontend *fe) 302{ 303 struct dvb_frontend_private *fepriv = fe->frontend_priv; 304 305 fepriv->reinitialise = 1; 306 dvb_frontend_wakeup(fe); 307} 308EXPORT_SYMBOL(dvb_frontend_reinitialise); 309 310static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) 311{ 312 int q2; 313 314 dprintk ("%s\n", __func__); 315 316 if (locked) 317 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; 318 else 319 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; 320 321 q2 = fepriv->quality - 128; 322 q2 *= q2; 323 324 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); 325} 326 327/** 328 * Performs automatic twiddling of frontend parameters. 329 * 330 * @param fe The frontend concerned. 331 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT 332 * @returns Number of complete iterations that have been performed. 333 */ 334static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) 335{ 336 int autoinversion; 337 int ready = 0; 338 int fe_set_err = 0; 339 struct dvb_frontend_private *fepriv = fe->frontend_priv; 340 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 341 int original_inversion = c->inversion; 342 u32 original_frequency = c->frequency; 343 344 /* are we using autoinversion? */ 345 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 346 (c->inversion == INVERSION_AUTO)); 347 348 /* setup parameters correctly */ 349 while(!ready) { 350 /* calculate the lnb_drift */ 351 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; 352 353 /* wrap the auto_step if we've exceeded the maximum drift */ 354 if (fepriv->lnb_drift > fepriv->max_drift) { 355 fepriv->auto_step = 0; 356 fepriv->auto_sub_step = 0; 357 fepriv->lnb_drift = 0; 358 } 359 360 /* perform inversion and +/- zigzag */ 361 switch(fepriv->auto_sub_step) { 362 case 0: 363 /* try with the current inversion and current drift setting */ 364 ready = 1; 365 break; 366 367 case 1: 368 if (!autoinversion) break; 369 370 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 371 ready = 1; 372 break; 373 374 case 2: 375 if (fepriv->lnb_drift == 0) break; 376 377 fepriv->lnb_drift = -fepriv->lnb_drift; 378 ready = 1; 379 break; 380 381 case 3: 382 if (fepriv->lnb_drift == 0) break; 383 if (!autoinversion) break; 384 385 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 386 fepriv->lnb_drift = -fepriv->lnb_drift; 387 ready = 1; 388 break; 389 390 default: 391 fepriv->auto_step++; 392 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ 393 break; 394 } 395 396 if (!ready) fepriv->auto_sub_step++; 397 } 398 399 /* if this attempt would hit where we started, indicate a complete 400 * iteration has occurred */ 401 if ((fepriv->auto_step == fepriv->started_auto_step) && 402 (fepriv->auto_sub_step == 0) && check_wrapped) { 403 return 1; 404 } 405 406 dprintk("%s: drift:%i inversion:%i auto_step:%i " 407 "auto_sub_step:%i started_auto_step:%i\n", 408 __func__, fepriv->lnb_drift, fepriv->inversion, 409 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step); 410 411 /* set the frontend itself */ 412 c->frequency += fepriv->lnb_drift; 413 if (autoinversion) 414 c->inversion = fepriv->inversion; 415 tmp = *c; 416 if (fe->ops.set_frontend) 417 fe_set_err = fe->ops.set_frontend(fe); 418 *c = tmp; 419 if (fe_set_err < 0) { 420 fepriv->state = FESTATE_ERROR; 421 return fe_set_err; 422 } 423 424 c->frequency = original_frequency; 425 c->inversion = original_inversion; 426 427 fepriv->auto_sub_step++; 428 return 0; 429} 430 431static void dvb_frontend_swzigzag(struct dvb_frontend *fe) 432{ 433 fe_status_t s = 0; 434 int retval = 0; 435 struct dvb_frontend_private *fepriv = fe->frontend_priv; 436 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 437 438 /* if we've got no parameters, just keep idling */ 439 if (fepriv->state & FESTATE_IDLE) { 440 fepriv->delay = 3*HZ; 441 fepriv->quality = 0; 442 return; 443 } 444 445 /* in SCAN mode, we just set the frontend when asked and leave it alone */ 446 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { 447 if (fepriv->state & FESTATE_RETUNE) { 448 tmp = *c; 449 if (fe->ops.set_frontend) 450 retval = fe->ops.set_frontend(fe); 451 *c = tmp; 452 if (retval < 0) 453 fepriv->state = FESTATE_ERROR; 454 else 455 fepriv->state = FESTATE_TUNED; 456 } 457 fepriv->delay = 3*HZ; 458 fepriv->quality = 0; 459 return; 460 } 461 462 /* get the frontend status */ 463 if (fepriv->state & FESTATE_RETUNE) { 464 s = 0; 465 } else { 466 if (fe->ops.read_status) 467 fe->ops.read_status(fe, &s); 468 if (s != fepriv->status) { 469 dvb_frontend_add_event(fe, s); 470 fepriv->status = s; 471 } 472 } 473 474 /* if we're not tuned, and we have a lock, move to the TUNED state */ 475 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { 476 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 477 fepriv->state = FESTATE_TUNED; 478 479 /* if we're tuned, then we have determined the correct inversion */ 480 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 481 (c->inversion == INVERSION_AUTO)) { 482 c->inversion = fepriv->inversion; 483 } 484 return; 485 } 486 487 /* if we are tuned already, check we're still locked */ 488 if (fepriv->state & FESTATE_TUNED) { 489 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 490 491 /* we're tuned, and the lock is still good... */ 492 if (s & FE_HAS_LOCK) { 493 return; 494 } else { /* if we _WERE_ tuned, but now don't have a lock */ 495 fepriv->state = FESTATE_ZIGZAG_FAST; 496 fepriv->started_auto_step = fepriv->auto_step; 497 fepriv->check_wrapped = 0; 498 } 499 } 500 501 /* don't actually do anything if we're in the LOSTLOCK state, 502 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ 503 if ((fepriv->state & FESTATE_LOSTLOCK) && 504 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { 505 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 506 return; 507 } 508 509 /* don't do anything if we're in the DISEQC state, since this 510 * might be someone with a motorized dish controlled by DISEQC. 511 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ 512 if (fepriv->state & FESTATE_DISEQC) { 513 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 514 return; 515 } 516 517 /* if we're in the RETUNE state, set everything up for a brand 518 * new scan, keeping the current inversion setting, as the next 519 * tune is _very_ likely to require the same */ 520 if (fepriv->state & FESTATE_RETUNE) { 521 fepriv->lnb_drift = 0; 522 fepriv->auto_step = 0; 523 fepriv->auto_sub_step = 0; 524 fepriv->started_auto_step = 0; 525 fepriv->check_wrapped = 0; 526 } 527 528 /* fast zigzag. */ 529 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { 530 fepriv->delay = fepriv->min_delay; 531 532 /* perform a tune */ 533 retval = dvb_frontend_swzigzag_autotune(fe, 534 fepriv->check_wrapped); 535 if (retval < 0) { 536 return; 537 } else if (retval) { 538 /* OK, if we've run out of trials at the fast speed. 539 * Drop back to slow for the _next_ attempt */ 540 fepriv->state = FESTATE_SEARCHING_SLOW; 541 fepriv->started_auto_step = fepriv->auto_step; 542 return; 543 } 544 fepriv->check_wrapped = 1; 545 546 /* if we've just retuned, enter the ZIGZAG_FAST state. 547 * This ensures we cannot return from an 548 * FE_SET_FRONTEND ioctl before the first frontend tune 549 * occurs */ 550 if (fepriv->state & FESTATE_RETUNE) { 551 fepriv->state = FESTATE_TUNING_FAST; 552 } 553 } 554 555 /* slow zigzag */ 556 if (fepriv->state & FESTATE_SEARCHING_SLOW) { 557 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 558 559 /* Note: don't bother checking for wrapping; we stay in this 560 * state until we get a lock */ 561 dvb_frontend_swzigzag_autotune(fe, 0); 562 } 563} 564 565static int dvb_frontend_is_exiting(struct dvb_frontend *fe) 566{ 567 struct dvb_frontend_private *fepriv = fe->frontend_priv; 568 569 if (fepriv->exit != DVB_FE_NO_EXIT) 570 return 1; 571 572 if (fepriv->dvbdev->writers == 1) 573 if (time_after_eq(jiffies, fepriv->release_jiffies + 574 dvb_shutdown_timeout * HZ)) 575 return 1; 576 577 return 0; 578} 579 580static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) 581{ 582 struct dvb_frontend_private *fepriv = fe->frontend_priv; 583 584 if (fepriv->wakeup) { 585 fepriv->wakeup = 0; 586 return 1; 587 } 588 return dvb_frontend_is_exiting(fe); 589} 590 591static void dvb_frontend_wakeup(struct dvb_frontend *fe) 592{ 593 struct dvb_frontend_private *fepriv = fe->frontend_priv; 594 595 fepriv->wakeup = 1; 596 wake_up_interruptible(&fepriv->wait_queue); 597} 598 599static int dvb_frontend_thread(void *data) 600{ 601 struct dvb_frontend *fe = data; 602 struct dvb_frontend_private *fepriv = fe->frontend_priv; 603 fe_status_t s; 604 enum dvbfe_algo algo; 605 606 bool re_tune = false; 607 608 dprintk("%s\n", __func__); 609 610 fepriv->check_wrapped = 0; 611 fepriv->quality = 0; 612 fepriv->delay = 3*HZ; 613 fepriv->status = 0; 614 fepriv->wakeup = 0; 615 fepriv->reinitialise = 0; 616 617 dvb_frontend_init(fe); 618 619 set_freezable(); 620 while (1) { 621 up(&fepriv->sem); /* is locked when we enter the thread... */ 622restart: 623 wait_event_interruptible_timeout(fepriv->wait_queue, 624 dvb_frontend_should_wakeup(fe) || kthread_should_stop() 625 || freezing(current), 626 fepriv->delay); 627 628 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { 629 /* got signal or quitting */ 630 fepriv->exit = DVB_FE_NORMAL_EXIT; 631 break; 632 } 633 634 if (try_to_freeze()) 635 goto restart; 636 637 if (down_interruptible(&fepriv->sem)) 638 break; 639 640 if (fepriv->reinitialise) { 641 dvb_frontend_init(fe); 642 if (fe->ops.set_tone && fepriv->tone != -1) 643 fe->ops.set_tone(fe, fepriv->tone); 644 if (fe->ops.set_voltage && fepriv->voltage != -1) 645 fe->ops.set_voltage(fe, fepriv->voltage); 646 fepriv->reinitialise = 0; 647 } 648 649 /* do an iteration of the tuning loop */ 650 if (fe->ops.get_frontend_algo) { 651 algo = fe->ops.get_frontend_algo(fe); 652 switch (algo) { 653 case DVBFE_ALGO_HW: 654 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); 655 656 if (fepriv->state & FESTATE_RETUNE) { 657 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__); 658 re_tune = true; 659 fepriv->state = FESTATE_TUNED; 660 } else { 661 re_tune = false; 662 } 663 664 if (fe->ops.tune) 665 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s); 666 667 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { 668 dprintk("%s: state changed, adding current state\n", __func__); 669 dvb_frontend_add_event(fe, s); 670 fepriv->status = s; 671 } 672 break; 673 case DVBFE_ALGO_SW: 674 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); 675 dvb_frontend_swzigzag(fe); 676 break; 677 case DVBFE_ALGO_CUSTOM: 678 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); 679 if (fepriv->state & FESTATE_RETUNE) { 680 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__); 681 fepriv->state = FESTATE_TUNED; 682 } 683 /* Case where we are going to search for a carrier 684 * User asked us to retune again for some reason, possibly 685 * requesting a search with a new set of parameters 686 */ 687 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { 688 if (fe->ops.search) { 689 fepriv->algo_status = fe->ops.search(fe); 690 /* We did do a search as was requested, the flags are 691 * now unset as well and has the flags wrt to search. 692 */ 693 } else { 694 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; 695 } 696 } 697 /* Track the carrier if the search was successful */ 698 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) { 699 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 700 fepriv->delay = HZ / 2; 701 } 702 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); 703 fe->ops.read_status(fe, &s); 704 if (s != fepriv->status) { 705 dvb_frontend_add_event(fe, s); /* update event list */ 706 fepriv->status = s; 707 if (!(s & FE_HAS_LOCK)) { 708 fepriv->delay = HZ / 10; 709 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 710 } else { 711 fepriv->delay = 60 * HZ; 712 } 713 } 714 break; 715 default: 716 dprintk("%s: UNDEFINED ALGO !\n", __func__); 717 break; 718 } 719 } else { 720 dvb_frontend_swzigzag(fe); 721 } 722 } 723 724 if (dvb_powerdown_on_sleep) { 725 if (fe->ops.set_voltage) 726 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); 727 if (fe->ops.tuner_ops.sleep) { 728 if (fe->ops.i2c_gate_ctrl) 729 fe->ops.i2c_gate_ctrl(fe, 1); 730 fe->ops.tuner_ops.sleep(fe); 731 if (fe->ops.i2c_gate_ctrl) 732 fe->ops.i2c_gate_ctrl(fe, 0); 733 } 734 if (fe->ops.sleep) 735 fe->ops.sleep(fe); 736 } 737 738 fepriv->thread = NULL; 739 if (kthread_should_stop()) 740 fepriv->exit = DVB_FE_DEVICE_REMOVED; 741 else 742 fepriv->exit = DVB_FE_NO_EXIT; 743 mb(); 744 745 dvb_frontend_wakeup(fe); 746 return 0; 747} 748 749static void dvb_frontend_stop(struct dvb_frontend *fe) 750{ 751 struct dvb_frontend_private *fepriv = fe->frontend_priv; 752 753 dprintk ("%s\n", __func__); 754 755 fepriv->exit = DVB_FE_NORMAL_EXIT; 756 mb(); 757 758 if (!fepriv->thread) 759 return; 760 761 kthread_stop(fepriv->thread); 762 763 sema_init(&fepriv->sem, 1); 764 fepriv->state = FESTATE_IDLE; 765 766 /* paranoia check in case a signal arrived */ 767 if (fepriv->thread) 768 printk("dvb_frontend_stop: warning: thread %p won't exit\n", 769 fepriv->thread); 770} 771 772s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) 773{ 774 return ((curtime.tv_usec < lasttime.tv_usec) ? 775 1000000 - lasttime.tv_usec + curtime.tv_usec : 776 curtime.tv_usec - lasttime.tv_usec); 777} 778EXPORT_SYMBOL(timeval_usec_diff); 779 780static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) 781{ 782 curtime->tv_usec += add_usec; 783 if (curtime->tv_usec >= 1000000) { 784 curtime->tv_usec -= 1000000; 785 curtime->tv_sec++; 786 } 787} 788 789/* 790 * Sleep until gettimeofday() > waketime + add_usec 791 * This needs to be as precise as possible, but as the delay is 792 * usually between 2ms and 32ms, it is done using a scheduled msleep 793 * followed by usleep (normally a busy-wait loop) for the remainder 794 */ 795void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) 796{ 797 struct timeval lasttime; 798 s32 delta, newdelta; 799 800 timeval_usec_add(waketime, add_usec); 801 802 do_gettimeofday(&lasttime); 803 delta = timeval_usec_diff(lasttime, *waketime); 804 if (delta > 2500) { 805 msleep((delta - 1500) / 1000); 806 do_gettimeofday(&lasttime); 807 newdelta = timeval_usec_diff(lasttime, *waketime); 808 delta = (newdelta > delta) ? 0 : newdelta; 809 } 810 if (delta > 0) 811 udelay(delta); 812} 813EXPORT_SYMBOL(dvb_frontend_sleep_until); 814 815static int dvb_frontend_start(struct dvb_frontend *fe) 816{ 817 int ret; 818 struct dvb_frontend_private *fepriv = fe->frontend_priv; 819 struct task_struct *fe_thread; 820 821 dprintk ("%s\n", __func__); 822 823 if (fepriv->thread) { 824 if (fepriv->exit == DVB_FE_NO_EXIT) 825 return 0; 826 else 827 dvb_frontend_stop (fe); 828 } 829 830 if (signal_pending(current)) 831 return -EINTR; 832 if (down_interruptible (&fepriv->sem)) 833 return -EINTR; 834 835 fepriv->state = FESTATE_IDLE; 836 fepriv->exit = DVB_FE_NO_EXIT; 837 fepriv->thread = NULL; 838 mb(); 839 840 fe_thread = kthread_run(dvb_frontend_thread, fe, 841 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id); 842 if (IS_ERR(fe_thread)) { 843 ret = PTR_ERR(fe_thread); 844 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret); 845 up(&fepriv->sem); 846 return ret; 847 } 848 fepriv->thread = fe_thread; 849 return 0; 850} 851 852static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe, 853 u32 *freq_min, u32 *freq_max) 854{ 855 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min); 856 857 if (fe->ops.info.frequency_max == 0) 858 *freq_max = fe->ops.tuner_ops.info.frequency_max; 859 else if (fe->ops.tuner_ops.info.frequency_max == 0) 860 *freq_max = fe->ops.info.frequency_max; 861 else 862 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max); 863 864 if (*freq_min == 0 || *freq_max == 0) 865 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n", 866 fe->dvb->num,fe->id); 867} 868 869static int dvb_frontend_check_parameters(struct dvb_frontend *fe) 870{ 871 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 872 u32 freq_min; 873 u32 freq_max; 874 875 /* range check: frequency */ 876 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max); 877 if ((freq_min && c->frequency < freq_min) || 878 (freq_max && c->frequency > freq_max)) { 879 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n", 880 fe->dvb->num, fe->id, c->frequency, freq_min, freq_max); 881 return -EINVAL; 882 } 883 884 /* range check: symbol rate */ 885 switch (c->delivery_system) { 886 case SYS_DVBS: 887 case SYS_DVBS2: 888 case SYS_TURBO: 889 case SYS_DVBC_ANNEX_A: 890 case SYS_DVBC_ANNEX_C: 891 if ((fe->ops.info.symbol_rate_min && 892 c->symbol_rate < fe->ops.info.symbol_rate_min) || 893 (fe->ops.info.symbol_rate_max && 894 c->symbol_rate > fe->ops.info.symbol_rate_max)) { 895 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", 896 fe->dvb->num, fe->id, c->symbol_rate, 897 fe->ops.info.symbol_rate_min, 898 fe->ops.info.symbol_rate_max); 899 return -EINVAL; 900 } 901 default: 902 break; 903 } 904 905 return 0; 906} 907 908static int dvb_frontend_clear_cache(struct dvb_frontend *fe) 909{ 910 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 911 int i; 912 u32 delsys; 913 914 delsys = c->delivery_system; 915 memset(c, 0, sizeof(struct dtv_frontend_properties)); 916 c->delivery_system = delsys; 917 918 c->state = DTV_CLEAR; 919 920 dprintk("%s() Clearing cache for delivery system %d\n", __func__, 921 c->delivery_system); 922 923 c->transmission_mode = TRANSMISSION_MODE_AUTO; 924 c->bandwidth_hz = 0; /* AUTO */ 925 c->guard_interval = GUARD_INTERVAL_AUTO; 926 c->hierarchy = HIERARCHY_AUTO; 927 c->symbol_rate = 0; 928 c->code_rate_HP = FEC_AUTO; 929 c->code_rate_LP = FEC_AUTO; 930 c->fec_inner = FEC_AUTO; 931 c->rolloff = ROLLOFF_AUTO; 932 c->voltage = SEC_VOLTAGE_OFF; 933 c->sectone = SEC_TONE_OFF; 934 c->pilot = PILOT_AUTO; 935 936 c->isdbt_partial_reception = 0; 937 c->isdbt_sb_mode = 0; 938 c->isdbt_sb_subchannel = 0; 939 c->isdbt_sb_segment_idx = 0; 940 c->isdbt_sb_segment_count = 0; 941 c->isdbt_layer_enabled = 0; 942 for (i = 0; i < 3; i++) { 943 c->layer[i].fec = FEC_AUTO; 944 c->layer[i].modulation = QAM_AUTO; 945 c->layer[i].interleaving = 0; 946 c->layer[i].segment_count = 0; 947 } 948 949 c->isdbs_ts_id = 0; 950 c->dvbt2_plp_id = 0; 951 952 switch (c->delivery_system) { 953 case SYS_DVBS: 954 case SYS_DVBS2: 955 case SYS_TURBO: 956 c->modulation = QPSK; /* implied for DVB-S in legacy API */ 957 c->rolloff = ROLLOFF_35;/* implied for DVB-S */ 958 break; 959 case SYS_ATSC: 960 c->modulation = VSB_8; 961 break; 962 default: 963 c->modulation = QAM_AUTO; 964 break; 965 } 966 967 return 0; 968} 969 970#define _DTV_CMD(n, s, b) \ 971[n] = { \ 972 .name = #n, \ 973 .cmd = n, \ 974 .set = s,\ 975 .buffer = b \ 976} 977 978static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = { 979 _DTV_CMD(DTV_TUNE, 1, 0), 980 _DTV_CMD(DTV_CLEAR, 1, 0), 981 982 /* Set */ 983 _DTV_CMD(DTV_FREQUENCY, 1, 0), 984 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), 985 _DTV_CMD(DTV_MODULATION, 1, 0), 986 _DTV_CMD(DTV_INVERSION, 1, 0), 987 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), 988 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), 989 _DTV_CMD(DTV_INNER_FEC, 1, 0), 990 _DTV_CMD(DTV_VOLTAGE, 1, 0), 991 _DTV_CMD(DTV_TONE, 1, 0), 992 _DTV_CMD(DTV_PILOT, 1, 0), 993 _DTV_CMD(DTV_ROLLOFF, 1, 0), 994 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), 995 _DTV_CMD(DTV_HIERARCHY, 1, 0), 996 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), 997 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), 998 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), 999 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), 1000 1001 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), 1002 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), 1003 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), 1004 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), 1005 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), 1006 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), 1007 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), 1008 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), 1009 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), 1010 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), 1011 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), 1012 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), 1013 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), 1014 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), 1015 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), 1016 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), 1017 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), 1018 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), 1019 1020 _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0), 1021 _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0), 1022 1023 /* Get */ 1024 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), 1025 _DTV_CMD(DTV_API_VERSION, 0, 0), 1026 _DTV_CMD(DTV_CODE_RATE_HP, 0, 0), 1027 _DTV_CMD(DTV_CODE_RATE_LP, 0, 0), 1028 _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0), 1029 _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0), 1030 _DTV_CMD(DTV_HIERARCHY, 0, 0), 1031 1032 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0), 1033}; 1034 1035static void dtv_property_dump(struct dtv_property *tvp) 1036{ 1037 int i; 1038 1039 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) { 1040 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n", 1041 __func__, tvp->cmd); 1042 return; 1043 } 1044 1045 dprintk("%s() tvp.cmd = 0x%08x (%s)\n" 1046 ,__func__ 1047 ,tvp->cmd 1048 ,dtv_cmds[ tvp->cmd ].name); 1049 1050 if(dtv_cmds[ tvp->cmd ].buffer) { 1051 1052 dprintk("%s() tvp.u.buffer.len = 0x%02x\n" 1053 ,__func__ 1054 ,tvp->u.buffer.len); 1055 1056 for(i = 0; i < tvp->u.buffer.len; i++) 1057 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n" 1058 ,__func__ 1059 ,i 1060 ,tvp->u.buffer.data[i]); 1061 1062 } else 1063 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data); 1064} 1065 1066/* Synchronise the legacy tuning parameters into the cache, so that demodulator 1067 * drivers can use a single set_frontend tuning function, regardless of whether 1068 * it's being used for the legacy or new API, reducing code and complexity. 1069 */ 1070static int dtv_property_cache_sync(struct dvb_frontend *fe, 1071 struct dtv_frontend_properties *c, 1072 const struct dvb_frontend_parameters *p) 1073{ 1074 c->frequency = p->frequency; 1075 c->inversion = p->inversion; 1076 1077 switch (dvbv3_type(c->delivery_system)) { 1078 case DVBV3_QPSK: 1079 dprintk("%s() Preparing QPSK req\n", __func__); 1080 c->symbol_rate = p->u.qpsk.symbol_rate; 1081 c->fec_inner = p->u.qpsk.fec_inner; 1082 break; 1083 case DVBV3_QAM: 1084 dprintk("%s() Preparing QAM req\n", __func__); 1085 c->symbol_rate = p->u.qam.symbol_rate; 1086 c->fec_inner = p->u.qam.fec_inner; 1087 c->modulation = p->u.qam.modulation; 1088 break; 1089 case DVBV3_OFDM: 1090 dprintk("%s() Preparing OFDM req\n", __func__); 1091 switch (p->u.ofdm.bandwidth) { 1092 case BANDWIDTH_10_MHZ: 1093 c->bandwidth_hz = 10000000; 1094 break; 1095 case BANDWIDTH_8_MHZ: 1096 c->bandwidth_hz = 8000000; 1097 break; 1098 case BANDWIDTH_7_MHZ: 1099 c->bandwidth_hz = 7000000; 1100 break; 1101 case BANDWIDTH_6_MHZ: 1102 c->bandwidth_hz = 6000000; 1103 break; 1104 case BANDWIDTH_5_MHZ: 1105 c->bandwidth_hz = 5000000; 1106 break; 1107 case BANDWIDTH_1_712_MHZ: 1108 c->bandwidth_hz = 1712000; 1109 break; 1110 case BANDWIDTH_AUTO: 1111 c->bandwidth_hz = 0; 1112 } 1113 1114 c->code_rate_HP = p->u.ofdm.code_rate_HP; 1115 c->code_rate_LP = p->u.ofdm.code_rate_LP; 1116 c->modulation = p->u.ofdm.constellation; 1117 c->transmission_mode = p->u.ofdm.transmission_mode; 1118 c->guard_interval = p->u.ofdm.guard_interval; 1119 c->hierarchy = p->u.ofdm.hierarchy_information; 1120 break; 1121 case DVBV3_ATSC: 1122 dprintk("%s() Preparing ATSC req\n", __func__); 1123 c->modulation = p->u.vsb.modulation; 1124 if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) 1125 c->delivery_system = SYS_ATSC; 1126 else 1127 c->delivery_system = SYS_DVBC_ANNEX_B; 1128 break; 1129 case DVBV3_UNKNOWN: 1130 printk(KERN_ERR 1131 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1132 __func__, c->delivery_system); 1133 return -EINVAL; 1134 } 1135 1136 return 0; 1137} 1138 1139/* Ensure the cached values are set correctly in the frontend 1140 * legacy tuning structures, for the advanced tuning API. 1141 */ 1142static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, 1143 struct dvb_frontend_parameters *p) 1144{ 1145 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1146 1147 p->frequency = c->frequency; 1148 p->inversion = c->inversion; 1149 1150 switch (dvbv3_type(c->delivery_system)) { 1151 case DVBV3_UNKNOWN: 1152 printk(KERN_ERR 1153 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1154 __func__, c->delivery_system); 1155 return -EINVAL; 1156 case DVBV3_QPSK: 1157 dprintk("%s() Preparing QPSK req\n", __func__); 1158 p->u.qpsk.symbol_rate = c->symbol_rate; 1159 p->u.qpsk.fec_inner = c->fec_inner; 1160 break; 1161 case DVBV3_QAM: 1162 dprintk("%s() Preparing QAM req\n", __func__); 1163 p->u.qam.symbol_rate = c->symbol_rate; 1164 p->u.qam.fec_inner = c->fec_inner; 1165 p->u.qam.modulation = c->modulation; 1166 break; 1167 case DVBV3_OFDM: 1168 dprintk("%s() Preparing OFDM req\n", __func__); 1169 1170 switch (c->bandwidth_hz) { 1171 case 10000000: 1172 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ; 1173 break; 1174 case 8000000: 1175 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1176 break; 1177 case 7000000: 1178 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1179 break; 1180 case 6000000: 1181 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1182 break; 1183 case 5000000: 1184 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ; 1185 break; 1186 case 1712000: 1187 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ; 1188 break; 1189 case 0: 1190 default: 1191 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1192 } 1193 p->u.ofdm.code_rate_HP = c->code_rate_HP; 1194 p->u.ofdm.code_rate_LP = c->code_rate_LP; 1195 p->u.ofdm.constellation = c->modulation; 1196 p->u.ofdm.transmission_mode = c->transmission_mode; 1197 p->u.ofdm.guard_interval = c->guard_interval; 1198 p->u.ofdm.hierarchy_information = c->hierarchy; 1199 break; 1200 case DVBV3_ATSC: 1201 dprintk("%s() Preparing VSB req\n", __func__); 1202 p->u.vsb.modulation = c->modulation; 1203 break; 1204 } 1205 return 0; 1206} 1207 1208/** 1209 * dtv_get_frontend - calls a callback for retrieving DTV parameters 1210 * @fe: struct dvb_frontend pointer 1211 * @c: struct dtv_frontend_properties pointer (DVBv5 cache) 1212 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct) 1213 * 1214 * This routine calls either the DVBv3 or DVBv5 get_frontend call. 1215 * If c is not null, it will update the DVBv5 cache struct pointed by it. 1216 * If p_out is not null, it will update the DVBv3 params pointed by it. 1217 */ 1218static int dtv_get_frontend(struct dvb_frontend *fe, 1219 struct dvb_frontend_parameters *p_out) 1220{ 1221 int r; 1222 1223 if (fe->ops.get_frontend) { 1224 r = fe->ops.get_frontend(fe); 1225 if (unlikely(r < 0)) 1226 return r; 1227 if (p_out) 1228 dtv_property_legacy_params_sync(fe, p_out); 1229 return 0; 1230 } 1231 1232 /* As everything is in cache, get_frontend fops are always supported */ 1233 return 0; 1234} 1235 1236static int dvb_frontend_ioctl_legacy(struct file *file, 1237 unsigned int cmd, void *parg); 1238static int dvb_frontend_ioctl_properties(struct file *file, 1239 unsigned int cmd, void *parg); 1240 1241static int dtv_property_process_get(struct dvb_frontend *fe, 1242 const struct dtv_frontend_properties *c, 1243 struct dtv_property *tvp, 1244 struct file *file) 1245{ 1246 int r, ncaps; 1247 1248 switch(tvp->cmd) { 1249 case DTV_ENUM_DELSYS: 1250 ncaps = 0; 1251 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { 1252 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps]; 1253 ncaps++; 1254 } 1255 tvp->u.buffer.len = ncaps; 1256 break; 1257 case DTV_FREQUENCY: 1258 tvp->u.data = c->frequency; 1259 break; 1260 case DTV_MODULATION: 1261 tvp->u.data = c->modulation; 1262 break; 1263 case DTV_BANDWIDTH_HZ: 1264 tvp->u.data = c->bandwidth_hz; 1265 break; 1266 case DTV_INVERSION: 1267 tvp->u.data = c->inversion; 1268 break; 1269 case DTV_SYMBOL_RATE: 1270 tvp->u.data = c->symbol_rate; 1271 break; 1272 case DTV_INNER_FEC: 1273 tvp->u.data = c->fec_inner; 1274 break; 1275 case DTV_PILOT: 1276 tvp->u.data = c->pilot; 1277 break; 1278 case DTV_ROLLOFF: 1279 tvp->u.data = c->rolloff; 1280 break; 1281 case DTV_DELIVERY_SYSTEM: 1282 tvp->u.data = c->delivery_system; 1283 break; 1284 case DTV_VOLTAGE: 1285 tvp->u.data = c->voltage; 1286 break; 1287 case DTV_TONE: 1288 tvp->u.data = c->sectone; 1289 break; 1290 case DTV_API_VERSION: 1291 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; 1292 break; 1293 case DTV_CODE_RATE_HP: 1294 tvp->u.data = c->code_rate_HP; 1295 break; 1296 case DTV_CODE_RATE_LP: 1297 tvp->u.data = c->code_rate_LP; 1298 break; 1299 case DTV_GUARD_INTERVAL: 1300 tvp->u.data = c->guard_interval; 1301 break; 1302 case DTV_TRANSMISSION_MODE: 1303 tvp->u.data = c->transmission_mode; 1304 break; 1305 case DTV_HIERARCHY: 1306 tvp->u.data = c->hierarchy; 1307 break; 1308 1309 /* ISDB-T Support here */ 1310 case DTV_ISDBT_PARTIAL_RECEPTION: 1311 tvp->u.data = c->isdbt_partial_reception; 1312 break; 1313 case DTV_ISDBT_SOUND_BROADCASTING: 1314 tvp->u.data = c->isdbt_sb_mode; 1315 break; 1316 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1317 tvp->u.data = c->isdbt_sb_subchannel; 1318 break; 1319 case DTV_ISDBT_SB_SEGMENT_IDX: 1320 tvp->u.data = c->isdbt_sb_segment_idx; 1321 break; 1322 case DTV_ISDBT_SB_SEGMENT_COUNT: 1323 tvp->u.data = c->isdbt_sb_segment_count; 1324 break; 1325 case DTV_ISDBT_LAYER_ENABLED: 1326 tvp->u.data = c->isdbt_layer_enabled; 1327 break; 1328 case DTV_ISDBT_LAYERA_FEC: 1329 tvp->u.data = c->layer[0].fec; 1330 break; 1331 case DTV_ISDBT_LAYERA_MODULATION: 1332 tvp->u.data = c->layer[0].modulation; 1333 break; 1334 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1335 tvp->u.data = c->layer[0].segment_count; 1336 break; 1337 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1338 tvp->u.data = c->layer[0].interleaving; 1339 break; 1340 case DTV_ISDBT_LAYERB_FEC: 1341 tvp->u.data = c->layer[1].fec; 1342 break; 1343 case DTV_ISDBT_LAYERB_MODULATION: 1344 tvp->u.data = c->layer[1].modulation; 1345 break; 1346 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1347 tvp->u.data = c->layer[1].segment_count; 1348 break; 1349 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1350 tvp->u.data = c->layer[1].interleaving; 1351 break; 1352 case DTV_ISDBT_LAYERC_FEC: 1353 tvp->u.data = c->layer[2].fec; 1354 break; 1355 case DTV_ISDBT_LAYERC_MODULATION: 1356 tvp->u.data = c->layer[2].modulation; 1357 break; 1358 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1359 tvp->u.data = c->layer[2].segment_count; 1360 break; 1361 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1362 tvp->u.data = c->layer[2].interleaving; 1363 break; 1364 case DTV_ISDBS_TS_ID: 1365 tvp->u.data = c->isdbs_ts_id; 1366 break; 1367 case DTV_DVBT2_PLP_ID: 1368 tvp->u.data = c->dvbt2_plp_id; 1369 break; 1370 default: 1371 return -EINVAL; 1372 } 1373 1374 /* Allow the frontend to override outgoing properties */ 1375 if (fe->ops.get_property) { 1376 r = fe->ops.get_property(fe, tvp); 1377 if (r < 0) 1378 return r; 1379 } 1380 1381 dtv_property_dump(tvp); 1382 1383 return 0; 1384} 1385 1386static int dtv_set_frontend(struct dvb_frontend *fe); 1387 1388static bool is_dvbv3_delsys(u32 delsys) 1389{ 1390 bool status; 1391 1392 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) || 1393 (delsys == SYS_DVBS) || (delsys == SYS_ATSC); 1394 1395 return status; 1396} 1397 1398static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system) 1399{ 1400 int ncaps, i; 1401 u32 delsys = SYS_UNDEFINED; 1402 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1403 enum dvbv3_emulation_type type; 1404 1405 /* 1406 * It was reported that some old DVBv5 applications were 1407 * filling delivery_system with SYS_UNDEFINED. If this happens, 1408 * assume that the application wants to use the first supported 1409 * delivery system. 1410 */ 1411 if (c->delivery_system == SYS_UNDEFINED) 1412 c->delivery_system = fe->ops.delsys[0]; 1413 1414 if (desired_system == SYS_UNDEFINED) { 1415 /* 1416 * A DVBv3 call doesn't know what's the desired system. 1417 * Also, DVBv3 applications don't know that ops.info->type 1418 * could be changed, and they simply dies when it doesn't 1419 * match. 1420 * So, don't change the current delivery system, as it 1421 * may be trying to do the wrong thing, like setting an 1422 * ISDB-T frontend as DVB-T. Instead, find the closest 1423 * DVBv3 system that matches the delivery system. 1424 */ 1425 if (is_dvbv3_delsys(c->delivery_system)) { 1426 dprintk("%s() Using delivery system to %d\n", 1427 __func__, c->delivery_system); 1428 return 0; 1429 } 1430 type = dvbv3_type(c->delivery_system); 1431 switch (type) { 1432 case DVBV3_QPSK: 1433 desired_system = SYS_DVBS; 1434 break; 1435 case DVBV3_QAM: 1436 desired_system = SYS_DVBC_ANNEX_A; 1437 break; 1438 case DVBV3_ATSC: 1439 desired_system = SYS_ATSC; 1440 break; 1441 case DVBV3_OFDM: 1442 desired_system = SYS_DVBT; 1443 break; 1444 default: 1445 dprintk("%s(): This frontend doesn't support DVBv3 calls\n", 1446 __func__); 1447 return -EINVAL; 1448 } 1449 /* 1450 * Get a delivery system that is compatible with DVBv3 1451 * NOTE: in order for this to work with softwares like Kaffeine that 1452 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to 1453 * DVB-S, drivers that support both should put the SYS_DVBS entry 1454 * before the SYS_DVBS2, otherwise it won't switch back to DVB-S. 1455 * The real fix is that userspace applications should not use DVBv3 1456 * and not trust on calling FE_SET_FRONTEND to switch the delivery 1457 * system. 1458 */ 1459 ncaps = 0; 1460 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { 1461 if (fe->ops.delsys[ncaps] == desired_system) { 1462 delsys = desired_system; 1463 break; 1464 } 1465 ncaps++; 1466 } 1467 if (delsys == SYS_UNDEFINED) { 1468 dprintk("%s() Couldn't find a delivery system that matches %d\n", 1469 __func__, desired_system); 1470 } 1471 } else { 1472 /* 1473 * This is a DVBv5 call. So, it likely knows the supported 1474 * delivery systems. 1475 */ 1476 1477 /* Check if the desired delivery system is supported */ 1478 ncaps = 0; 1479 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { 1480 if (fe->ops.delsys[ncaps] == desired_system) { 1481 c->delivery_system = desired_system; 1482 dprintk("%s() Changing delivery system to %d\n", 1483 __func__, desired_system); 1484 return 0; 1485 } 1486 ncaps++; 1487 } 1488 type = dvbv3_type(desired_system); 1489 1490 /* 1491 * The delivery system is not supported. See if it can be 1492 * emulated. 1493 * The emulation only works if the desired system is one of the 1494 * DVBv3 delivery systems 1495 */ 1496 if (!is_dvbv3_delsys(desired_system)) { 1497 dprintk("%s() can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n", 1498 __func__); 1499 return -EINVAL; 1500 } 1501 1502 /* 1503 * Get the last non-DVBv3 delivery system that has the same type 1504 * of the desired system 1505 */ 1506 ncaps = 0; 1507 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { 1508 if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) && 1509 !is_dvbv3_delsys(fe->ops.delsys[ncaps])) 1510 delsys = fe->ops.delsys[ncaps]; 1511 ncaps++; 1512 } 1513 /* There's nothing compatible with the desired delivery system */ 1514 if (delsys == SYS_UNDEFINED) { 1515 dprintk("%s() Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n", 1516 __func__); 1517 return -EINVAL; 1518 } 1519 } 1520 1521 c->delivery_system = delsys; 1522 1523 /* 1524 * The DVBv3 or DVBv5 call is requesting a different system. So, 1525 * emulation is needed. 1526 * 1527 * Emulate newer delivery systems like ISDBT, DVBT and DMBTH 1528 * for older DVBv5 applications. The emulation will try to use 1529 * the auto mode for most things, and will assume that the desired 1530 * delivery system is the last one at the ops.delsys[] array 1531 */ 1532 dprintk("%s() Using delivery system %d emulated as if it were a %d\n", 1533 __func__, delsys, desired_system); 1534 1535 /* 1536 * For now, handles ISDB-T calls. More code may be needed here for the 1537 * other emulated stuff 1538 */ 1539 if (type == DVBV3_OFDM) { 1540 if (c->delivery_system == SYS_ISDBT) { 1541 dprintk("%s() Using defaults for SYS_ISDBT\n", 1542 __func__); 1543 if (!c->bandwidth_hz) 1544 c->bandwidth_hz = 6000000; 1545 1546 c->isdbt_partial_reception = 0; 1547 c->isdbt_sb_mode = 0; 1548 c->isdbt_sb_subchannel = 0; 1549 c->isdbt_sb_segment_idx = 0; 1550 c->isdbt_sb_segment_count = 0; 1551 c->isdbt_layer_enabled = 0; 1552 for (i = 0; i < 3; i++) { 1553 c->layer[i].fec = FEC_AUTO; 1554 c->layer[i].modulation = QAM_AUTO; 1555 c->layer[i].interleaving = 0; 1556 c->layer[i].segment_count = 0; 1557 } 1558 } 1559 } 1560 dprintk("change delivery system on cache to %d\n", c->delivery_system); 1561 1562 return 0; 1563} 1564 1565static int dtv_property_process_set(struct dvb_frontend *fe, 1566 struct dtv_property *tvp, 1567 struct file *file) 1568{ 1569 int r = 0; 1570 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1571 1572 /* Allow the frontend to validate incoming properties */ 1573 if (fe->ops.set_property) { 1574 r = fe->ops.set_property(fe, tvp); 1575 if (r < 0) 1576 return r; 1577 } 1578 1579 switch(tvp->cmd) { 1580 case DTV_CLEAR: 1581 /* 1582 * Reset a cache of data specific to the frontend here. This does 1583 * not effect hardware. 1584 */ 1585 dvb_frontend_clear_cache(fe); 1586 break; 1587 case DTV_TUNE: 1588 /* interpret the cache of data, build either a traditional frontend 1589 * tunerequest so we can pass validation in the FE_SET_FRONTEND 1590 * ioctl. 1591 */ 1592 c->state = tvp->cmd; 1593 dprintk("%s() Finalised property cache\n", __func__); 1594 1595 r = dtv_set_frontend(fe); 1596 break; 1597 case DTV_FREQUENCY: 1598 c->frequency = tvp->u.data; 1599 break; 1600 case DTV_MODULATION: 1601 c->modulation = tvp->u.data; 1602 break; 1603 case DTV_BANDWIDTH_HZ: 1604 c->bandwidth_hz = tvp->u.data; 1605 break; 1606 case DTV_INVERSION: 1607 c->inversion = tvp->u.data; 1608 break; 1609 case DTV_SYMBOL_RATE: 1610 c->symbol_rate = tvp->u.data; 1611 break; 1612 case DTV_INNER_FEC: 1613 c->fec_inner = tvp->u.data; 1614 break; 1615 case DTV_PILOT: 1616 c->pilot = tvp->u.data; 1617 break; 1618 case DTV_ROLLOFF: 1619 c->rolloff = tvp->u.data; 1620 break; 1621 case DTV_DELIVERY_SYSTEM: 1622 r = set_delivery_system(fe, tvp->u.data); 1623 break; 1624 case DTV_VOLTAGE: 1625 c->voltage = tvp->u.data; 1626 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE, 1627 (void *)c->voltage); 1628 break; 1629 case DTV_TONE: 1630 c->sectone = tvp->u.data; 1631 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE, 1632 (void *)c->sectone); 1633 break; 1634 case DTV_CODE_RATE_HP: 1635 c->code_rate_HP = tvp->u.data; 1636 break; 1637 case DTV_CODE_RATE_LP: 1638 c->code_rate_LP = tvp->u.data; 1639 break; 1640 case DTV_GUARD_INTERVAL: 1641 c->guard_interval = tvp->u.data; 1642 break; 1643 case DTV_TRANSMISSION_MODE: 1644 c->transmission_mode = tvp->u.data; 1645 break; 1646 case DTV_HIERARCHY: 1647 c->hierarchy = tvp->u.data; 1648 break; 1649 1650 /* ISDB-T Support here */ 1651 case DTV_ISDBT_PARTIAL_RECEPTION: 1652 c->isdbt_partial_reception = tvp->u.data; 1653 break; 1654 case DTV_ISDBT_SOUND_BROADCASTING: 1655 c->isdbt_sb_mode = tvp->u.data; 1656 break; 1657 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1658 c->isdbt_sb_subchannel = tvp->u.data; 1659 break; 1660 case DTV_ISDBT_SB_SEGMENT_IDX: 1661 c->isdbt_sb_segment_idx = tvp->u.data; 1662 break; 1663 case DTV_ISDBT_SB_SEGMENT_COUNT: 1664 c->isdbt_sb_segment_count = tvp->u.data; 1665 break; 1666 case DTV_ISDBT_LAYER_ENABLED: 1667 c->isdbt_layer_enabled = tvp->u.data; 1668 break; 1669 case DTV_ISDBT_LAYERA_FEC: 1670 c->layer[0].fec = tvp->u.data; 1671 break; 1672 case DTV_ISDBT_LAYERA_MODULATION: 1673 c->layer[0].modulation = tvp->u.data; 1674 break; 1675 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1676 c->layer[0].segment_count = tvp->u.data; 1677 break; 1678 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1679 c->layer[0].interleaving = tvp->u.data; 1680 break; 1681 case DTV_ISDBT_LAYERB_FEC: 1682 c->layer[1].fec = tvp->u.data; 1683 break; 1684 case DTV_ISDBT_LAYERB_MODULATION: 1685 c->layer[1].modulation = tvp->u.data; 1686 break; 1687 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1688 c->layer[1].segment_count = tvp->u.data; 1689 break; 1690 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1691 c->layer[1].interleaving = tvp->u.data; 1692 break; 1693 case DTV_ISDBT_LAYERC_FEC: 1694 c->layer[2].fec = tvp->u.data; 1695 break; 1696 case DTV_ISDBT_LAYERC_MODULATION: 1697 c->layer[2].modulation = tvp->u.data; 1698 break; 1699 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1700 c->layer[2].segment_count = tvp->u.data; 1701 break; 1702 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1703 c->layer[2].interleaving = tvp->u.data; 1704 break; 1705 case DTV_ISDBS_TS_ID: 1706 c->isdbs_ts_id = tvp->u.data; 1707 break; 1708 case DTV_DVBT2_PLP_ID: 1709 c->dvbt2_plp_id = tvp->u.data; 1710 break; 1711 default: 1712 return -EINVAL; 1713 } 1714 1715 return r; 1716} 1717 1718static int dvb_frontend_ioctl(struct file *file, 1719 unsigned int cmd, void *parg) 1720{ 1721 struct dvb_device *dvbdev = file->private_data; 1722 struct dvb_frontend *fe = dvbdev->priv; 1723 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1724 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1725 int err = -EOPNOTSUPP; 1726 1727 dprintk("%s (%d)\n", __func__, _IOC_NR(cmd)); 1728 1729 if (fepriv->exit != DVB_FE_NO_EXIT) 1730 return -ENODEV; 1731 1732 if ((file->f_flags & O_ACCMODE) == O_RDONLY && 1733 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || 1734 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) 1735 return -EPERM; 1736 1737 if (down_interruptible (&fepriv->sem)) 1738 return -ERESTARTSYS; 1739 1740 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY)) 1741 err = dvb_frontend_ioctl_properties(file, cmd, parg); 1742 else { 1743 c->state = DTV_UNDEFINED; 1744 err = dvb_frontend_ioctl_legacy(file, cmd, parg); 1745 } 1746 1747 up(&fepriv->sem); 1748 return err; 1749} 1750 1751static int dvb_frontend_ioctl_properties(struct file *file, 1752 unsigned int cmd, void *parg) 1753{ 1754 struct dvb_device *dvbdev = file->private_data; 1755 struct dvb_frontend *fe = dvbdev->priv; 1756 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1757 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1758 int err = 0; 1759 1760 struct dtv_properties *tvps = NULL; 1761 struct dtv_property *tvp = NULL; 1762 int i; 1763 1764 dprintk("%s\n", __func__); 1765 1766 if(cmd == FE_SET_PROPERTY) { 1767 tvps = (struct dtv_properties __user *)parg; 1768 1769 dprintk("%s() properties.num = %d\n", __func__, tvps->num); 1770 dprintk("%s() properties.props = %p\n", __func__, tvps->props); 1771 1772 /* Put an arbitrary limit on the number of messages that can 1773 * be sent at once */ 1774 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1775 return -EINVAL; 1776 1777 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1778 if (!tvp) { 1779 err = -ENOMEM; 1780 goto out; 1781 } 1782 1783 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1784 err = -EFAULT; 1785 goto out; 1786 } 1787 1788 for (i = 0; i < tvps->num; i++) { 1789 err = dtv_property_process_set(fe, tvp + i, file); 1790 if (err < 0) 1791 goto out; 1792 (tvp + i)->result = err; 1793 } 1794 1795 if (c->state == DTV_TUNE) 1796 dprintk("%s() Property cache is full, tuning\n", __func__); 1797 1798 } else 1799 if(cmd == FE_GET_PROPERTY) { 1800 tvps = (struct dtv_properties __user *)parg; 1801 1802 dprintk("%s() properties.num = %d\n", __func__, tvps->num); 1803 dprintk("%s() properties.props = %p\n", __func__, tvps->props); 1804 1805 /* Put an arbitrary limit on the number of messages that can 1806 * be sent at once */ 1807 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1808 return -EINVAL; 1809 1810 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1811 if (!tvp) { 1812 err = -ENOMEM; 1813 goto out; 1814 } 1815 1816 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1817 err = -EFAULT; 1818 goto out; 1819 } 1820 1821 /* 1822 * Fills the cache out struct with the cache contents, plus 1823 * the data retrieved from get_frontend, if the frontend 1824 * is not idle. Otherwise, returns the cached content 1825 */ 1826 if (fepriv->state != FESTATE_IDLE) { 1827 err = dtv_get_frontend(fe, NULL); 1828 if (err < 0) 1829 goto out; 1830 } 1831 for (i = 0; i < tvps->num; i++) { 1832 err = dtv_property_process_get(fe, c, tvp + i, file); 1833 if (err < 0) 1834 goto out; 1835 (tvp + i)->result = err; 1836 } 1837 1838 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) { 1839 err = -EFAULT; 1840 goto out; 1841 } 1842 1843 } else 1844 err = -EOPNOTSUPP; 1845 1846out: 1847 kfree(tvp); 1848 return err; 1849} 1850 1851static int dtv_set_frontend(struct dvb_frontend *fe) 1852{ 1853 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1854 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1855 struct dvb_frontend_tune_settings fetunesettings; 1856 u32 rolloff = 0; 1857 1858 if (dvb_frontend_check_parameters(fe) < 0) 1859 return -EINVAL; 1860 1861 /* 1862 * Initialize output parameters to match the values given by 1863 * the user. FE_SET_FRONTEND triggers an initial frontend event 1864 * with status = 0, which copies output parameters to userspace. 1865 */ 1866 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); 1867 1868 /* 1869 * Be sure that the bandwidth will be filled for all 1870 * non-satellite systems, as tuners need to know what 1871 * low pass/Nyquist half filter should be applied, in 1872 * order to avoid inter-channel noise. 1873 * 1874 * ISDB-T and DVB-T/T2 already sets bandwidth. 1875 * ATSC and DVB-C don't set, so, the core should fill it. 1876 * 1877 * On DVB-C Annex A and C, the bandwidth is a function of 1878 * the roll-off and symbol rate. Annex B defines different 1879 * roll-off factors depending on the modulation. Fortunately, 1880 * Annex B is only used with 6MHz, so there's no need to 1881 * calculate it. 1882 * 1883 * While not officially supported, a side effect of handling it at 1884 * the cache level is that a program could retrieve the bandwidth 1885 * via DTV_BANDWIDTH_HZ, which may be useful for test programs. 1886 */ 1887 switch (c->delivery_system) { 1888 case SYS_ATSC: 1889 case SYS_DVBC_ANNEX_B: 1890 c->bandwidth_hz = 6000000; 1891 break; 1892 case SYS_DVBC_ANNEX_A: 1893 rolloff = 115; 1894 break; 1895 case SYS_DVBC_ANNEX_C: 1896 rolloff = 113; 1897 break; 1898 default: 1899 break; 1900 } 1901 if (rolloff) 1902 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100; 1903 1904 /* force auto frequency inversion if requested */ 1905 if (dvb_force_auto_inversion) 1906 c->inversion = INVERSION_AUTO; 1907 1908 /* 1909 * without hierarchical coding code_rate_LP is irrelevant, 1910 * so we tolerate the otherwise invalid FEC_NONE setting 1911 */ 1912 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE) 1913 c->code_rate_LP = FEC_AUTO; 1914 1915 /* get frontend-specific tuning settings */ 1916 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); 1917 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { 1918 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; 1919 fepriv->max_drift = fetunesettings.max_drift; 1920 fepriv->step_size = fetunesettings.step_size; 1921 } else { 1922 /* default values */ 1923 switch (c->delivery_system) { 1924 case SYS_DVBS: 1925 case SYS_DVBS2: 1926 case SYS_ISDBS: 1927 case SYS_TURBO: 1928 case SYS_DVBC_ANNEX_A: 1929 case SYS_DVBC_ANNEX_C: 1930 fepriv->min_delay = HZ / 20; 1931 fepriv->step_size = c->symbol_rate / 16000; 1932 fepriv->max_drift = c->symbol_rate / 2000; 1933 break; 1934 case SYS_DVBT: 1935 case SYS_DVBT2: 1936 case SYS_ISDBT: 1937 case SYS_DMBTH: 1938 fepriv->min_delay = HZ / 20; 1939 fepriv->step_size = fe->ops.info.frequency_stepsize * 2; 1940 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; 1941 break; 1942 default: 1943 /* 1944 * FIXME: This sounds wrong! if freqency_stepsize is 1945 * defined by the frontend, why not use it??? 1946 */ 1947 fepriv->min_delay = HZ / 20; 1948 fepriv->step_size = 0; /* no zigzag */ 1949 fepriv->max_drift = 0; 1950 break; 1951 } 1952 } 1953 if (dvb_override_tune_delay > 0) 1954 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; 1955 1956 fepriv->state = FESTATE_RETUNE; 1957 1958 /* Request the search algorithm to search */ 1959 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 1960 1961 dvb_frontend_clear_events(fe); 1962 dvb_frontend_add_event(fe, 0); 1963 dvb_frontend_wakeup(fe); 1964 fepriv->status = 0; 1965 1966 return 0; 1967} 1968 1969 1970static int dvb_frontend_ioctl_legacy(struct file *file, 1971 unsigned int cmd, void *parg) 1972{ 1973 struct dvb_device *dvbdev = file->private_data; 1974 struct dvb_frontend *fe = dvbdev->priv; 1975 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1976 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1977 int cb_err, err = -EOPNOTSUPP; 1978 1979 if (fe->dvb->fe_ioctl_override) { 1980 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg, 1981 DVB_FE_IOCTL_PRE); 1982 if (cb_err < 0) 1983 return cb_err; 1984 if (cb_err > 0) 1985 return 0; 1986 /* fe_ioctl_override returning 0 allows 1987 * dvb-core to continue handling the ioctl */ 1988 } 1989 1990 switch (cmd) { 1991 case FE_GET_INFO: { 1992 struct dvb_frontend_info* info = parg; 1993 1994 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); 1995 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max); 1996 1997 /* 1998 * Associate the 4 delivery systems supported by DVBv3 1999 * API with their DVBv5 counterpart. For the other standards, 2000 * use the closest type, assuming that it would hopefully 2001 * work with a DVBv3 application. 2002 * It should be noticed that, on multi-frontend devices with 2003 * different types (terrestrial and cable, for example), 2004 * a pure DVBv3 application won't be able to use all delivery 2005 * systems. Yet, changing the DVBv5 cache to the other delivery 2006 * system should be enough for making it work. 2007 */ 2008 switch (dvbv3_type(c->delivery_system)) { 2009 case DVBV3_QPSK: 2010 info->type = FE_QPSK; 2011 break; 2012 case DVBV3_ATSC: 2013 info->type = FE_ATSC; 2014 break; 2015 case DVBV3_QAM: 2016 info->type = FE_QAM; 2017 break; 2018 case DVBV3_OFDM: 2019 info->type = FE_OFDM; 2020 break; 2021 default: 2022 printk(KERN_ERR 2023 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 2024 __func__, c->delivery_system); 2025 fe->ops.info.type = FE_OFDM; 2026 } 2027 dprintk("current delivery system on cache: %d, V3 type: %d\n", 2028 c->delivery_system, fe->ops.info.type); 2029 2030 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't 2031 * do it, it is done for it. */ 2032 info->caps |= FE_CAN_INVERSION_AUTO; 2033 err = 0; 2034 break; 2035 } 2036 2037 case FE_READ_STATUS: { 2038 fe_status_t* status = parg; 2039 2040 /* if retune was requested but hasn't occurred yet, prevent 2041 * that user get signal state from previous tuning */ 2042 if (fepriv->state == FESTATE_RETUNE || 2043 fepriv->state == FESTATE_ERROR) { 2044 err=0; 2045 *status = 0; 2046 break; 2047 } 2048 2049 if (fe->ops.read_status) 2050 err = fe->ops.read_status(fe, status); 2051 break; 2052 } 2053 case FE_READ_BER: 2054 if (fe->ops.read_ber) 2055 err = fe->ops.read_ber(fe, (__u32*) parg); 2056 break; 2057 2058 case FE_READ_SIGNAL_STRENGTH: 2059 if (fe->ops.read_signal_strength) 2060 err = fe->ops.read_signal_strength(fe, (__u16*) parg); 2061 break; 2062 2063 case FE_READ_SNR: 2064 if (fe->ops.read_snr) 2065 err = fe->ops.read_snr(fe, (__u16*) parg); 2066 break; 2067 2068 case FE_READ_UNCORRECTED_BLOCKS: 2069 if (fe->ops.read_ucblocks) 2070 err = fe->ops.read_ucblocks(fe, (__u32*) parg); 2071 break; 2072 2073 2074 case FE_DISEQC_RESET_OVERLOAD: 2075 if (fe->ops.diseqc_reset_overload) { 2076 err = fe->ops.diseqc_reset_overload(fe); 2077 fepriv->state = FESTATE_DISEQC; 2078 fepriv->status = 0; 2079 } 2080 break; 2081 2082 case FE_DISEQC_SEND_MASTER_CMD: 2083 if (fe->ops.diseqc_send_master_cmd) { 2084 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); 2085 fepriv->state = FESTATE_DISEQC; 2086 fepriv->status = 0; 2087 } 2088 break; 2089 2090 case FE_DISEQC_SEND_BURST: 2091 if (fe->ops.diseqc_send_burst) { 2092 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); 2093 fepriv->state = FESTATE_DISEQC; 2094 fepriv->status = 0; 2095 } 2096 break; 2097 2098 case FE_SET_TONE: 2099 if (fe->ops.set_tone) { 2100 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); 2101 fepriv->tone = (fe_sec_tone_mode_t) parg; 2102 fepriv->state = FESTATE_DISEQC; 2103 fepriv->status = 0; 2104 } 2105 break; 2106 2107 case FE_SET_VOLTAGE: 2108 if (fe->ops.set_voltage) { 2109 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); 2110 fepriv->voltage = (fe_sec_voltage_t) parg; 2111 fepriv->state = FESTATE_DISEQC; 2112 fepriv->status = 0; 2113 } 2114 break; 2115 2116 case FE_DISHNETWORK_SEND_LEGACY_CMD: 2117 if (fe->ops.dishnetwork_send_legacy_command) { 2118 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); 2119 fepriv->state = FESTATE_DISEQC; 2120 fepriv->status = 0; 2121 } else if (fe->ops.set_voltage) { 2122 /* 2123 * NOTE: This is a fallback condition. Some frontends 2124 * (stv0299 for instance) take longer than 8msec to 2125 * respond to a set_voltage command. Those switches 2126 * need custom routines to switch properly. For all 2127 * other frontends, the following should work ok. 2128 * Dish network legacy switches (as used by Dish500) 2129 * are controlled by sending 9-bit command words 2130 * spaced 8msec apart. 2131 * the actual command word is switch/port dependent 2132 * so it is up to the userspace application to send 2133 * the right command. 2134 * The command must always start with a '0' after 2135 * initialization, so parg is 8 bits and does not 2136 * include the initialization or start bit 2137 */ 2138 unsigned long swcmd = ((unsigned long) parg) << 1; 2139 struct timeval nexttime; 2140 struct timeval tv[10]; 2141 int i; 2142 u8 last = 1; 2143 if (dvb_frontend_debug) 2144 printk("%s switch command: 0x%04lx\n", __func__, swcmd); 2145 do_gettimeofday(&nexttime); 2146 if (dvb_frontend_debug) 2147 memcpy(&tv[0], &nexttime, sizeof(struct timeval)); 2148 /* before sending a command, initialize by sending 2149 * a 32ms 18V to the switch 2150 */ 2151 fe->ops.set_voltage(fe, SEC_VOLTAGE_18); 2152 dvb_frontend_sleep_until(&nexttime, 32000); 2153 2154 for (i = 0; i < 9; i++) { 2155 if (dvb_frontend_debug) 2156 do_gettimeofday(&tv[i + 1]); 2157 if ((swcmd & 0x01) != last) { 2158 /* set voltage to (last ? 13V : 18V) */ 2159 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); 2160 last = (last) ? 0 : 1; 2161 } 2162 swcmd = swcmd >> 1; 2163 if (i != 8) 2164 dvb_frontend_sleep_until(&nexttime, 8000); 2165 } 2166 if (dvb_frontend_debug) { 2167 printk("%s(%d): switch delay (should be 32k followed by all 8k\n", 2168 __func__, fe->dvb->num); 2169 for (i = 1; i < 10; i++) 2170 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); 2171 } 2172 err = 0; 2173 fepriv->state = FESTATE_DISEQC; 2174 fepriv->status = 0; 2175 } 2176 break; 2177 2178 case FE_DISEQC_RECV_SLAVE_REPLY: 2179 if (fe->ops.diseqc_recv_slave_reply) 2180 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); 2181 break; 2182 2183 case FE_ENABLE_HIGH_LNB_VOLTAGE: 2184 if (fe->ops.enable_high_lnb_voltage) 2185 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); 2186 break; 2187 2188 case FE_SET_FRONTEND: 2189 err = set_delivery_system(fe, SYS_UNDEFINED); 2190 if (err) 2191 break; 2192 2193 err = dtv_property_cache_sync(fe, c, parg); 2194 if (err) 2195 break; 2196 err = dtv_set_frontend(fe); 2197 break; 2198 case FE_GET_EVENT: 2199 err = dvb_frontend_get_event (fe, parg, file->f_flags); 2200 break; 2201 2202 case FE_GET_FRONTEND: 2203 err = dtv_get_frontend(fe, parg); 2204 break; 2205 2206 case FE_SET_FRONTEND_TUNE_MODE: 2207 fepriv->tune_mode_flags = (unsigned long) parg; 2208 err = 0; 2209 break; 2210 }; 2211 2212 if (fe->dvb->fe_ioctl_override) { 2213 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg, 2214 DVB_FE_IOCTL_POST); 2215 if (cb_err < 0) 2216 return cb_err; 2217 } 2218 2219 return err; 2220} 2221 2222 2223static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) 2224{ 2225 struct dvb_device *dvbdev = file->private_data; 2226 struct dvb_frontend *fe = dvbdev->priv; 2227 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2228 2229 dprintk ("%s\n", __func__); 2230 2231 poll_wait (file, &fepriv->events.wait_queue, wait); 2232 2233 if (fepriv->events.eventw != fepriv->events.eventr) 2234 return (POLLIN | POLLRDNORM | POLLPRI); 2235 2236 return 0; 2237} 2238 2239static int dvb_frontend_open(struct inode *inode, struct file *file) 2240{ 2241 struct dvb_device *dvbdev = file->private_data; 2242 struct dvb_frontend *fe = dvbdev->priv; 2243 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2244 struct dvb_adapter *adapter = fe->dvb; 2245 int ret; 2246 2247 dprintk ("%s\n", __func__); 2248 if (fepriv->exit == DVB_FE_DEVICE_REMOVED) 2249 return -ENODEV; 2250 2251 if (adapter->mfe_shared) { 2252 mutex_lock (&adapter->mfe_lock); 2253 2254 if (adapter->mfe_dvbdev == NULL) 2255 adapter->mfe_dvbdev = dvbdev; 2256 2257 else if (adapter->mfe_dvbdev != dvbdev) { 2258 struct dvb_device 2259 *mfedev = adapter->mfe_dvbdev; 2260 struct dvb_frontend 2261 *mfe = mfedev->priv; 2262 struct dvb_frontend_private 2263 *mfepriv = mfe->frontend_priv; 2264 int mferetry = (dvb_mfe_wait_time << 1); 2265 2266 mutex_unlock (&adapter->mfe_lock); 2267 while (mferetry-- && (mfedev->users != -1 || 2268 mfepriv->thread != NULL)) { 2269 if(msleep_interruptible(500)) { 2270 if(signal_pending(current)) 2271 return -EINTR; 2272 } 2273 } 2274 2275 mutex_lock (&adapter->mfe_lock); 2276 if(adapter->mfe_dvbdev != dvbdev) { 2277 mfedev = adapter->mfe_dvbdev; 2278 mfe = mfedev->priv; 2279 mfepriv = mfe->frontend_priv; 2280 if (mfedev->users != -1 || 2281 mfepriv->thread != NULL) { 2282 mutex_unlock (&adapter->mfe_lock); 2283 return -EBUSY; 2284 } 2285 adapter->mfe_dvbdev = dvbdev; 2286 } 2287 } 2288 } 2289 2290 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { 2291 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) 2292 goto err0; 2293 2294 /* If we took control of the bus, we need to force 2295 reinitialization. This is because many ts_bus_ctrl() 2296 functions strobe the RESET pin on the demod, and if the 2297 frontend thread already exists then the dvb_init() routine 2298 won't get called (which is what usually does initial 2299 register configuration). */ 2300 fepriv->reinitialise = 1; 2301 } 2302 2303 if ((ret = dvb_generic_open (inode, file)) < 0) 2304 goto err1; 2305 2306 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2307 /* normal tune mode when opened R/W */ 2308 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; 2309 fepriv->tone = -1; 2310 fepriv->voltage = -1; 2311 2312 ret = dvb_frontend_start (fe); 2313 if (ret) 2314 goto err2; 2315 2316 /* empty event queue */ 2317 fepriv->events.eventr = fepriv->events.eventw = 0; 2318 } 2319 2320 if (adapter->mfe_shared) 2321 mutex_unlock (&adapter->mfe_lock); 2322 return ret; 2323 2324err2: 2325 dvb_generic_release(inode, file); 2326err1: 2327 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) 2328 fe->ops.ts_bus_ctrl(fe, 0); 2329err0: 2330 if (adapter->mfe_shared) 2331 mutex_unlock (&adapter->mfe_lock); 2332 return ret; 2333} 2334 2335static int dvb_frontend_release(struct inode *inode, struct file *file) 2336{ 2337 struct dvb_device *dvbdev = file->private_data; 2338 struct dvb_frontend *fe = dvbdev->priv; 2339 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2340 int ret; 2341 2342 dprintk ("%s\n", __func__); 2343 2344 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2345 fepriv->release_jiffies = jiffies; 2346 mb(); 2347 } 2348 2349 ret = dvb_generic_release (inode, file); 2350 2351 if (dvbdev->users == -1) { 2352 wake_up(&fepriv->wait_queue); 2353 if (fepriv->exit != DVB_FE_NO_EXIT) { 2354 fops_put(file->f_op); 2355 file->f_op = NULL; 2356 wake_up(&dvbdev->wait_queue); 2357 } 2358 if (fe->ops.ts_bus_ctrl) 2359 fe->ops.ts_bus_ctrl(fe, 0); 2360 } 2361 2362 return ret; 2363} 2364 2365static const struct file_operations dvb_frontend_fops = { 2366 .owner = THIS_MODULE, 2367 .unlocked_ioctl = dvb_generic_ioctl, 2368 .poll = dvb_frontend_poll, 2369 .open = dvb_frontend_open, 2370 .release = dvb_frontend_release, 2371 .llseek = noop_llseek, 2372}; 2373 2374int dvb_register_frontend(struct dvb_adapter* dvb, 2375 struct dvb_frontend* fe) 2376{ 2377 struct dvb_frontend_private *fepriv; 2378 static const struct dvb_device dvbdev_template = { 2379 .users = ~0, 2380 .writers = 1, 2381 .readers = (~0)-1, 2382 .fops = &dvb_frontend_fops, 2383 .kernel_ioctl = dvb_frontend_ioctl 2384 }; 2385 2386 dprintk ("%s\n", __func__); 2387 2388 if (mutex_lock_interruptible(&frontend_mutex)) 2389 return -ERESTARTSYS; 2390 2391 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); 2392 if (fe->frontend_priv == NULL) { 2393 mutex_unlock(&frontend_mutex); 2394 return -ENOMEM; 2395 } 2396 fepriv = fe->frontend_priv; 2397 2398 sema_init(&fepriv->sem, 1); 2399 init_waitqueue_head (&fepriv->wait_queue); 2400 init_waitqueue_head (&fepriv->events.wait_queue); 2401 mutex_init(&fepriv->events.mtx); 2402 fe->dvb = dvb; 2403 fepriv->inversion = INVERSION_OFF; 2404 2405 printk ("DVB: registering adapter %i frontend %i (%s)...\n", 2406 fe->dvb->num, 2407 fe->id, 2408 fe->ops.info.name); 2409 2410 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, 2411 fe, DVB_DEVICE_FRONTEND); 2412 2413 /* 2414 * Initialize the cache to the proper values according with the 2415 * first supported delivery system (ops->delsys[0]) 2416 */ 2417 2418 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0]; 2419 dvb_frontend_clear_cache(fe); 2420 2421 mutex_unlock(&frontend_mutex); 2422 return 0; 2423} 2424EXPORT_SYMBOL(dvb_register_frontend); 2425 2426int dvb_unregister_frontend(struct dvb_frontend* fe) 2427{ 2428 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2429 dprintk ("%s\n", __func__); 2430 2431 mutex_lock(&frontend_mutex); 2432 dvb_frontend_stop (fe); 2433 mutex_unlock(&frontend_mutex); 2434 2435 if (fepriv->dvbdev->users < -1) 2436 wait_event(fepriv->dvbdev->wait_queue, 2437 fepriv->dvbdev->users==-1); 2438 2439 mutex_lock(&frontend_mutex); 2440 dvb_unregister_device (fepriv->dvbdev); 2441 2442 /* fe is invalid now */ 2443 kfree(fepriv); 2444 mutex_unlock(&frontend_mutex); 2445 return 0; 2446} 2447EXPORT_SYMBOL(dvb_unregister_frontend); 2448 2449#ifdef CONFIG_MEDIA_ATTACH 2450void dvb_frontend_detach(struct dvb_frontend* fe) 2451{ 2452 void *ptr; 2453 2454 if (fe->ops.release_sec) { 2455 fe->ops.release_sec(fe); 2456 symbol_put_addr(fe->ops.release_sec); 2457 } 2458 if (fe->ops.tuner_ops.release) { 2459 fe->ops.tuner_ops.release(fe); 2460 symbol_put_addr(fe->ops.tuner_ops.release); 2461 } 2462 if (fe->ops.analog_ops.release) { 2463 fe->ops.analog_ops.release(fe); 2464 symbol_put_addr(fe->ops.analog_ops.release); 2465 } 2466 ptr = (void*)fe->ops.release; 2467 if (ptr) { 2468 fe->ops.release(fe); 2469 symbol_put_addr(ptr); 2470 } 2471} 2472#else 2473void dvb_frontend_detach(struct dvb_frontend* fe) 2474{ 2475 if (fe->ops.release_sec) 2476 fe->ops.release_sec(fe); 2477 if (fe->ops.tuner_ops.release) 2478 fe->ops.tuner_ops.release(fe); 2479 if (fe->ops.analog_ops.release) 2480 fe->ops.analog_ops.release(fe); 2481 if (fe->ops.release) 2482 fe->ops.release(fe); 2483} 2484#endif 2485EXPORT_SYMBOL(dvb_frontend_detach); 2486