1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * dvb_frontend.c: DVB frontend tuning interface/thread 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 13 /* Enables DVBv3 compatibility bits at the headers */ 14 #define __DVB_CORE__ 15 16 #define pr_fmt(fmt) "dvb_frontend: " fmt 17 18 #include <linux/string.h> 19 #include <linux/kernel.h> 20 #include <linux/sched/signal.h> 21 #include <linux/wait.h> 22 #include <linux/slab.h> 23 #include <linux/poll.h> 24 #include <linux/semaphore.h> 25 #include <linux/module.h> 26 #include <linux/nospec.h> 27 #include <linux/list.h> 28 #include <linux/freezer.h> 29 #include <linux/jiffies.h> 30 #include <linux/kthread.h> 31 #include <linux/ktime.h> 32 #include <linux/compat.h> 33 #include <asm/processor.h> 34 35 #include <media/dvb_frontend.h> 36 #include <media/dvbdev.h> 37 #include <linux/dvb/version.h> 38 39 static int dvb_frontend_debug; 40 static int dvb_shutdown_timeout; 41 static int dvb_force_auto_inversion; 42 static int dvb_override_tune_delay; 43 static int dvb_powerdown_on_sleep = 1; 44 static int dvb_mfe_wait_time = 5; 45 46 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644); 47 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off)."); 48 module_param(dvb_shutdown_timeout, int, 0644); 49 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); 50 module_param(dvb_force_auto_inversion, int, 0644); 51 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); 52 module_param(dvb_override_tune_delay, int, 0644); 53 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt"); 54 module_param(dvb_powerdown_on_sleep, int, 0644); 55 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)"); 56 module_param(dvb_mfe_wait_time, int, 0644); 57 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)"); 58 59 #define dprintk(fmt, arg...) \ 60 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg) 61 62 #define FESTATE_IDLE 1 63 #define FESTATE_RETUNE 2 64 #define FESTATE_TUNING_FAST 4 65 #define FESTATE_TUNING_SLOW 8 66 #define FESTATE_TUNED 16 67 #define FESTATE_ZIGZAG_FAST 32 68 #define FESTATE_ZIGZAG_SLOW 64 69 #define FESTATE_DISEQC 128 70 #define FESTATE_ERROR 256 71 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) 72 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) 73 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) 74 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) 75 76 /* 77 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. 78 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. 79 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. 80 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. 81 * FESTATE_TUNED. The frontend has successfully locked on. 82 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. 83 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. 84 * FESTATE_DISEQC. A DISEQC command has just been issued. 85 * FESTATE_WAITFORLOCK. When we're waiting for a lock. 86 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. 87 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. 88 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. 89 */ 90 91 static DEFINE_MUTEX(frontend_mutex); 92 93 struct dvb_frontend_private { 94 /* thread/frontend values */ 95 struct dvb_device *dvbdev; 96 struct dvb_frontend_parameters parameters_out; 97 struct dvb_fe_events events; 98 struct semaphore sem; 99 struct list_head list_head; 100 wait_queue_head_t wait_queue; 101 struct task_struct *thread; 102 unsigned long release_jiffies; 103 unsigned int wakeup; 104 enum fe_status status; 105 unsigned long tune_mode_flags; 106 unsigned int delay; 107 unsigned int reinitialise; 108 int tone; 109 int voltage; 110 111 /* swzigzag values */ 112 unsigned int state; 113 unsigned int bending; 114 int lnb_drift; 115 unsigned int inversion; 116 unsigned int auto_step; 117 unsigned int auto_sub_step; 118 unsigned int started_auto_step; 119 unsigned int min_delay; 120 unsigned int max_drift; 121 unsigned int step_size; 122 int quality; 123 unsigned int check_wrapped; 124 enum dvbfe_search algo_status; 125 126 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 127 struct media_pipeline pipe; 128 #endif 129 }; 130 131 static void dvb_frontend_invoke_release(struct dvb_frontend *fe, 132 void (*release)(struct dvb_frontend *fe)); 133 134 static void __dvb_frontend_free(struct dvb_frontend *fe) 135 { 136 struct dvb_frontend_private *fepriv = fe->frontend_priv; 137 138 if (fepriv) 139 dvb_free_device(fepriv->dvbdev); 140 141 dvb_frontend_invoke_release(fe, fe->ops.release); 142 143 kfree(fepriv); 144 } 145 146 static void dvb_frontend_free(struct kref *ref) 147 { 148 struct dvb_frontend *fe = 149 container_of(ref, struct dvb_frontend, refcount); 150 151 __dvb_frontend_free(fe); 152 } 153 154 static void dvb_frontend_put(struct dvb_frontend *fe) 155 { 156 /* call detach before dropping the reference count */ 157 if (fe->ops.detach) 158 fe->ops.detach(fe); 159 /* 160 * Check if the frontend was registered, as otherwise 161 * kref was not initialized yet. 162 */ 163 if (fe->frontend_priv) 164 kref_put(&fe->refcount, dvb_frontend_free); 165 else 166 __dvb_frontend_free(fe); 167 } 168 169 static void dvb_frontend_get(struct dvb_frontend *fe) 170 { 171 kref_get(&fe->refcount); 172 } 173 174 static void dvb_frontend_wakeup(struct dvb_frontend *fe); 175 static int dtv_get_frontend(struct dvb_frontend *fe, 176 struct dtv_frontend_properties *c, 177 struct dvb_frontend_parameters *p_out); 178 static int 179 dtv_property_legacy_params_sync(struct dvb_frontend *fe, 180 const struct dtv_frontend_properties *c, 181 struct dvb_frontend_parameters *p); 182 183 static bool has_get_frontend(struct dvb_frontend *fe) 184 { 185 return fe->ops.get_frontend; 186 } 187 188 /* 189 * Due to DVBv3 API calls, a delivery system should be mapped into one of 190 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC), 191 * otherwise, a DVBv3 call will fail. 192 */ 193 enum dvbv3_emulation_type { 194 DVBV3_UNKNOWN, 195 DVBV3_QPSK, 196 DVBV3_QAM, 197 DVBV3_OFDM, 198 DVBV3_ATSC, 199 }; 200 201 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system) 202 { 203 switch (delivery_system) { 204 case SYS_DVBC_ANNEX_A: 205 case SYS_DVBC_ANNEX_C: 206 return DVBV3_QAM; 207 case SYS_DVBS: 208 case SYS_DVBS2: 209 case SYS_TURBO: 210 case SYS_ISDBS: 211 case SYS_DSS: 212 return DVBV3_QPSK; 213 case SYS_DVBT: 214 case SYS_DVBT2: 215 case SYS_ISDBT: 216 case SYS_DTMB: 217 return DVBV3_OFDM; 218 case SYS_ATSC: 219 case SYS_ATSCMH: 220 case SYS_DVBC_ANNEX_B: 221 return DVBV3_ATSC; 222 case SYS_UNDEFINED: 223 case SYS_ISDBC: 224 case SYS_DVBH: 225 case SYS_DAB: 226 default: 227 /* 228 * Doesn't know how to emulate those types and/or 229 * there's no frontend driver from this type yet 230 * with some emulation code, so, we're not sure yet how 231 * to handle them, or they're not compatible with a DVBv3 call. 232 */ 233 return DVBV3_UNKNOWN; 234 } 235 } 236 237 static void dvb_frontend_add_event(struct dvb_frontend *fe, 238 enum fe_status status) 239 { 240 struct dvb_frontend_private *fepriv = fe->frontend_priv; 241 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 242 struct dvb_fe_events *events = &fepriv->events; 243 struct dvb_frontend_event *e; 244 int wp; 245 246 dev_dbg(fe->dvb->device, "%s:\n", __func__); 247 248 if ((status & FE_HAS_LOCK) && has_get_frontend(fe)) 249 dtv_get_frontend(fe, c, &fepriv->parameters_out); 250 251 mutex_lock(&events->mtx); 252 253 wp = (events->eventw + 1) % MAX_EVENT; 254 if (wp == events->eventr) { 255 events->overflow = 1; 256 events->eventr = (events->eventr + 1) % MAX_EVENT; 257 } 258 259 e = &events->events[events->eventw]; 260 e->status = status; 261 e->parameters = fepriv->parameters_out; 262 263 events->eventw = wp; 264 265 mutex_unlock(&events->mtx); 266 267 wake_up_interruptible(&events->wait_queue); 268 } 269 270 static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv, 271 struct dvb_fe_events *events) 272 { 273 int ret; 274 275 up(&fepriv->sem); 276 ret = events->eventw != events->eventr; 277 down(&fepriv->sem); 278 279 return ret; 280 } 281 282 static int dvb_frontend_get_event(struct dvb_frontend *fe, 283 struct dvb_frontend_event *event, int flags) 284 { 285 struct dvb_frontend_private *fepriv = fe->frontend_priv; 286 struct dvb_fe_events *events = &fepriv->events; 287 288 dev_dbg(fe->dvb->device, "%s:\n", __func__); 289 290 if (events->overflow) { 291 events->overflow = 0; 292 return -EOVERFLOW; 293 } 294 295 if (events->eventw == events->eventr) { 296 int ret; 297 298 if (flags & O_NONBLOCK) 299 return -EWOULDBLOCK; 300 301 ret = wait_event_interruptible(events->wait_queue, 302 dvb_frontend_test_event(fepriv, events)); 303 304 if (ret < 0) 305 return ret; 306 } 307 308 mutex_lock(&events->mtx); 309 *event = events->events[events->eventr]; 310 events->eventr = (events->eventr + 1) % MAX_EVENT; 311 mutex_unlock(&events->mtx); 312 313 return 0; 314 } 315 316 static void dvb_frontend_clear_events(struct dvb_frontend *fe) 317 { 318 struct dvb_frontend_private *fepriv = fe->frontend_priv; 319 struct dvb_fe_events *events = &fepriv->events; 320 321 mutex_lock(&events->mtx); 322 events->eventr = events->eventw; 323 mutex_unlock(&events->mtx); 324 } 325 326 static void dvb_frontend_init(struct dvb_frontend *fe) 327 { 328 dev_dbg(fe->dvb->device, 329 "%s: initialising adapter %i frontend %i (%s)...\n", 330 __func__, fe->dvb->num, fe->id, fe->ops.info.name); 331 332 if (fe->ops.init) 333 fe->ops.init(fe); 334 if (fe->ops.tuner_ops.init) { 335 if (fe->ops.i2c_gate_ctrl) 336 fe->ops.i2c_gate_ctrl(fe, 1); 337 fe->ops.tuner_ops.init(fe); 338 if (fe->ops.i2c_gate_ctrl) 339 fe->ops.i2c_gate_ctrl(fe, 0); 340 } 341 } 342 343 void dvb_frontend_reinitialise(struct dvb_frontend *fe) 344 { 345 struct dvb_frontend_private *fepriv = fe->frontend_priv; 346 347 fepriv->reinitialise = 1; 348 dvb_frontend_wakeup(fe); 349 } 350 EXPORT_SYMBOL(dvb_frontend_reinitialise); 351 352 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) 353 { 354 int q2; 355 struct dvb_frontend *fe = fepriv->dvbdev->priv; 356 357 dev_dbg(fe->dvb->device, "%s:\n", __func__); 358 359 if (locked) 360 (fepriv->quality) = (fepriv->quality * 220 + 36 * 256) / 256; 361 else 362 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; 363 364 q2 = fepriv->quality - 128; 365 q2 *= q2; 366 367 fepriv->delay = fepriv->min_delay + q2 * HZ / (128 * 128); 368 } 369 370 /** 371 * dvb_frontend_swzigzag_autotune - Performs automatic twiddling of frontend 372 * parameters. 373 * 374 * @fe: The frontend concerned. 375 * @check_wrapped: Checks if an iteration has completed. 376 * DO NOT SET ON THE FIRST ATTEMPT. 377 * 378 * return: Number of complete iterations that have been performed. 379 */ 380 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) 381 { 382 int autoinversion; 383 int ready = 0; 384 int fe_set_err = 0; 385 struct dvb_frontend_private *fepriv = fe->frontend_priv; 386 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 387 int original_inversion = c->inversion; 388 u32 original_frequency = c->frequency; 389 390 /* are we using autoinversion? */ 391 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 392 (c->inversion == INVERSION_AUTO)); 393 394 /* setup parameters correctly */ 395 while (!ready) { 396 /* calculate the lnb_drift */ 397 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; 398 399 /* wrap the auto_step if we've exceeded the maximum drift */ 400 if (fepriv->lnb_drift > fepriv->max_drift) { 401 fepriv->auto_step = 0; 402 fepriv->auto_sub_step = 0; 403 fepriv->lnb_drift = 0; 404 } 405 406 /* perform inversion and +/- zigzag */ 407 switch (fepriv->auto_sub_step) { 408 case 0: 409 /* try with the current inversion and current drift setting */ 410 ready = 1; 411 break; 412 413 case 1: 414 if (!autoinversion) break; 415 416 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 417 ready = 1; 418 break; 419 420 case 2: 421 if (fepriv->lnb_drift == 0) break; 422 423 fepriv->lnb_drift = -fepriv->lnb_drift; 424 ready = 1; 425 break; 426 427 case 3: 428 if (fepriv->lnb_drift == 0) break; 429 if (!autoinversion) break; 430 431 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 432 fepriv->lnb_drift = -fepriv->lnb_drift; 433 ready = 1; 434 break; 435 436 default: 437 fepriv->auto_step++; 438 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ 439 break; 440 } 441 442 if (!ready) fepriv->auto_sub_step++; 443 } 444 445 /* if this attempt would hit where we started, indicate a complete 446 * iteration has occurred */ 447 if ((fepriv->auto_step == fepriv->started_auto_step) && 448 (fepriv->auto_sub_step == 0) && check_wrapped) { 449 return 1; 450 } 451 452 dev_dbg(fe->dvb->device, 453 "%s: drift:%i inversion:%i auto_step:%i auto_sub_step:%i started_auto_step:%i\n", 454 __func__, fepriv->lnb_drift, fepriv->inversion, 455 fepriv->auto_step, fepriv->auto_sub_step, 456 fepriv->started_auto_step); 457 458 /* set the frontend itself */ 459 c->frequency += fepriv->lnb_drift; 460 if (autoinversion) 461 c->inversion = fepriv->inversion; 462 tmp = *c; 463 if (fe->ops.set_frontend) 464 fe_set_err = fe->ops.set_frontend(fe); 465 *c = tmp; 466 if (fe_set_err < 0) { 467 fepriv->state = FESTATE_ERROR; 468 return fe_set_err; 469 } 470 471 c->frequency = original_frequency; 472 c->inversion = original_inversion; 473 474 fepriv->auto_sub_step++; 475 return 0; 476 } 477 478 static void dvb_frontend_swzigzag(struct dvb_frontend *fe) 479 { 480 enum fe_status s = FE_NONE; 481 int retval = 0; 482 struct dvb_frontend_private *fepriv = fe->frontend_priv; 483 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 484 485 if (fepriv->max_drift) 486 dev_warn_once(fe->dvb->device, 487 "Frontend requested software zigzag, but didn't set the frequency step size\n"); 488 489 /* if we've got no parameters, just keep idling */ 490 if (fepriv->state & FESTATE_IDLE) { 491 fepriv->delay = 3 * HZ; 492 fepriv->quality = 0; 493 return; 494 } 495 496 /* in SCAN mode, we just set the frontend when asked and leave it alone */ 497 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { 498 if (fepriv->state & FESTATE_RETUNE) { 499 tmp = *c; 500 if (fe->ops.set_frontend) 501 retval = fe->ops.set_frontend(fe); 502 *c = tmp; 503 if (retval < 0) 504 fepriv->state = FESTATE_ERROR; 505 else 506 fepriv->state = FESTATE_TUNED; 507 } 508 fepriv->delay = 3 * HZ; 509 fepriv->quality = 0; 510 return; 511 } 512 513 /* get the frontend status */ 514 if (fepriv->state & FESTATE_RETUNE) { 515 s = 0; 516 } else { 517 if (fe->ops.read_status) 518 fe->ops.read_status(fe, &s); 519 if (s != fepriv->status) { 520 dvb_frontend_add_event(fe, s); 521 fepriv->status = s; 522 } 523 } 524 525 /* if we're not tuned, and we have a lock, move to the TUNED state */ 526 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { 527 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 528 fepriv->state = FESTATE_TUNED; 529 530 /* if we're tuned, then we have determined the correct inversion */ 531 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 532 (c->inversion == INVERSION_AUTO)) { 533 c->inversion = fepriv->inversion; 534 } 535 return; 536 } 537 538 /* if we are tuned already, check we're still locked */ 539 if (fepriv->state & FESTATE_TUNED) { 540 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 541 542 /* we're tuned, and the lock is still good... */ 543 if (s & FE_HAS_LOCK) { 544 return; 545 } else { /* if we _WERE_ tuned, but now don't have a lock */ 546 fepriv->state = FESTATE_ZIGZAG_FAST; 547 fepriv->started_auto_step = fepriv->auto_step; 548 fepriv->check_wrapped = 0; 549 } 550 } 551 552 /* don't actually do anything if we're in the LOSTLOCK state, 553 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ 554 if ((fepriv->state & FESTATE_LOSTLOCK) && 555 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { 556 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 557 return; 558 } 559 560 /* don't do anything if we're in the DISEQC state, since this 561 * might be someone with a motorized dish controlled by DISEQC. 562 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ 563 if (fepriv->state & FESTATE_DISEQC) { 564 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 565 return; 566 } 567 568 /* if we're in the RETUNE state, set everything up for a brand 569 * new scan, keeping the current inversion setting, as the next 570 * tune is _very_ likely to require the same */ 571 if (fepriv->state & FESTATE_RETUNE) { 572 fepriv->lnb_drift = 0; 573 fepriv->auto_step = 0; 574 fepriv->auto_sub_step = 0; 575 fepriv->started_auto_step = 0; 576 fepriv->check_wrapped = 0; 577 } 578 579 /* fast zigzag. */ 580 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { 581 fepriv->delay = fepriv->min_delay; 582 583 /* perform a tune */ 584 retval = dvb_frontend_swzigzag_autotune(fe, 585 fepriv->check_wrapped); 586 if (retval < 0) { 587 return; 588 } else if (retval) { 589 /* OK, if we've run out of trials at the fast speed. 590 * Drop back to slow for the _next_ attempt */ 591 fepriv->state = FESTATE_SEARCHING_SLOW; 592 fepriv->started_auto_step = fepriv->auto_step; 593 return; 594 } 595 fepriv->check_wrapped = 1; 596 597 /* if we've just re-tuned, enter the ZIGZAG_FAST state. 598 * This ensures we cannot return from an 599 * FE_SET_FRONTEND ioctl before the first frontend tune 600 * occurs */ 601 if (fepriv->state & FESTATE_RETUNE) { 602 fepriv->state = FESTATE_TUNING_FAST; 603 } 604 } 605 606 /* slow zigzag */ 607 if (fepriv->state & FESTATE_SEARCHING_SLOW) { 608 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 609 610 /* Note: don't bother checking for wrapping; we stay in this 611 * state until we get a lock */ 612 dvb_frontend_swzigzag_autotune(fe, 0); 613 } 614 } 615 616 static int dvb_frontend_is_exiting(struct dvb_frontend *fe) 617 { 618 struct dvb_frontend_private *fepriv = fe->frontend_priv; 619 620 if (fe->exit != DVB_FE_NO_EXIT) 621 return 1; 622 623 if (fepriv->dvbdev->writers == 1) 624 if (time_after_eq(jiffies, fepriv->release_jiffies + 625 dvb_shutdown_timeout * HZ)) 626 return 1; 627 628 return 0; 629 } 630 631 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) 632 { 633 struct dvb_frontend_private *fepriv = fe->frontend_priv; 634 635 if (fepriv->wakeup) { 636 fepriv->wakeup = 0; 637 return 1; 638 } 639 return dvb_frontend_is_exiting(fe); 640 } 641 642 static void dvb_frontend_wakeup(struct dvb_frontend *fe) 643 { 644 struct dvb_frontend_private *fepriv = fe->frontend_priv; 645 646 fepriv->wakeup = 1; 647 wake_up_interruptible(&fepriv->wait_queue); 648 } 649 650 static int dvb_frontend_thread(void *data) 651 { 652 struct dvb_frontend *fe = data; 653 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 654 struct dvb_frontend_private *fepriv = fe->frontend_priv; 655 enum fe_status s = FE_NONE; 656 enum dvbfe_algo algo; 657 bool re_tune = false; 658 bool semheld = false; 659 660 dev_dbg(fe->dvb->device, "%s:\n", __func__); 661 662 fepriv->check_wrapped = 0; 663 fepriv->quality = 0; 664 fepriv->delay = 3 * HZ; 665 fepriv->status = 0; 666 fepriv->wakeup = 0; 667 fepriv->reinitialise = 0; 668 669 dvb_frontend_init(fe); 670 671 set_freezable(); 672 while (1) { 673 up(&fepriv->sem); /* is locked when we enter the thread... */ 674 restart: 675 wait_event_interruptible_timeout(fepriv->wait_queue, 676 dvb_frontend_should_wakeup(fe) || 677 kthread_should_stop() || 678 freezing(current), 679 fepriv->delay); 680 681 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { 682 /* got signal or quitting */ 683 if (!down_interruptible(&fepriv->sem)) 684 semheld = true; 685 fe->exit = DVB_FE_NORMAL_EXIT; 686 break; 687 } 688 689 if (try_to_freeze()) 690 goto restart; 691 692 if (down_interruptible(&fepriv->sem)) 693 break; 694 695 if (fepriv->reinitialise) { 696 dvb_frontend_init(fe); 697 if (fe->ops.set_tone && fepriv->tone != -1) 698 fe->ops.set_tone(fe, fepriv->tone); 699 if (fe->ops.set_voltage && fepriv->voltage != -1) 700 fe->ops.set_voltage(fe, fepriv->voltage); 701 fepriv->reinitialise = 0; 702 } 703 704 /* do an iteration of the tuning loop */ 705 if (fe->ops.get_frontend_algo) { 706 algo = fe->ops.get_frontend_algo(fe); 707 switch (algo) { 708 case DVBFE_ALGO_HW: 709 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); 710 711 if (fepriv->state & FESTATE_RETUNE) { 712 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__); 713 re_tune = true; 714 fepriv->state = FESTATE_TUNED; 715 } else { 716 re_tune = false; 717 } 718 719 if (fe->ops.tune) 720 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s); 721 722 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { 723 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__); 724 dvb_frontend_add_event(fe, s); 725 fepriv->status = s; 726 } 727 break; 728 case DVBFE_ALGO_SW: 729 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); 730 dvb_frontend_swzigzag(fe); 731 break; 732 case DVBFE_ALGO_CUSTOM: 733 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); 734 if (fepriv->state & FESTATE_RETUNE) { 735 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__); 736 fepriv->state = FESTATE_TUNED; 737 } 738 /* Case where we are going to search for a carrier 739 * User asked us to retune again for some reason, possibly 740 * requesting a search with a new set of parameters 741 */ 742 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { 743 if (fe->ops.search) { 744 fepriv->algo_status = fe->ops.search(fe); 745 /* We did do a search as was requested, the flags are 746 * now unset as well and has the flags wrt to search. 747 */ 748 } else { 749 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; 750 } 751 } 752 /* Track the carrier if the search was successful */ 753 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) { 754 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 755 fepriv->delay = HZ / 2; 756 } 757 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out); 758 fe->ops.read_status(fe, &s); 759 if (s != fepriv->status) { 760 dvb_frontend_add_event(fe, s); /* update event list */ 761 fepriv->status = s; 762 if (!(s & FE_HAS_LOCK)) { 763 fepriv->delay = HZ / 10; 764 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 765 } else { 766 fepriv->delay = 60 * HZ; 767 } 768 } 769 break; 770 default: 771 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__); 772 break; 773 } 774 } else { 775 dvb_frontend_swzigzag(fe); 776 } 777 } 778 779 if (dvb_powerdown_on_sleep) { 780 if (fe->ops.set_voltage) 781 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); 782 if (fe->ops.tuner_ops.sleep) { 783 if (fe->ops.i2c_gate_ctrl) 784 fe->ops.i2c_gate_ctrl(fe, 1); 785 fe->ops.tuner_ops.sleep(fe); 786 if (fe->ops.i2c_gate_ctrl) 787 fe->ops.i2c_gate_ctrl(fe, 0); 788 } 789 if (fe->ops.sleep) 790 fe->ops.sleep(fe); 791 } 792 793 fepriv->thread = NULL; 794 if (kthread_should_stop()) 795 fe->exit = DVB_FE_DEVICE_REMOVED; 796 else 797 fe->exit = DVB_FE_NO_EXIT; 798 mb(); 799 800 if (semheld) 801 up(&fepriv->sem); 802 dvb_frontend_wakeup(fe); 803 return 0; 804 } 805 806 static void dvb_frontend_stop(struct dvb_frontend *fe) 807 { 808 struct dvb_frontend_private *fepriv = fe->frontend_priv; 809 810 dev_dbg(fe->dvb->device, "%s:\n", __func__); 811 812 if (fe->exit != DVB_FE_DEVICE_REMOVED) 813 fe->exit = DVB_FE_NORMAL_EXIT; 814 mb(); 815 816 if (!fepriv->thread) 817 return; 818 819 kthread_stop(fepriv->thread); 820 821 sema_init(&fepriv->sem, 1); 822 fepriv->state = FESTATE_IDLE; 823 824 /* paranoia check in case a signal arrived */ 825 if (fepriv->thread) 826 dev_warn(fe->dvb->device, 827 "dvb_frontend_stop: warning: thread %p won't exit\n", 828 fepriv->thread); 829 } 830 831 /* 832 * Sleep for the amount of time given by add_usec parameter 833 * 834 * This needs to be as precise as possible, as it affects the detection of 835 * the dish tone command at the satellite subsystem. The precision is improved 836 * by using a scheduled msleep followed by udelay for the remainder. 837 */ 838 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec) 839 { 840 s32 delta; 841 842 *waketime = ktime_add_us(*waketime, add_usec); 843 delta = ktime_us_delta(ktime_get_boottime(), *waketime); 844 if (delta > 2500) { 845 msleep((delta - 1500) / 1000); 846 delta = ktime_us_delta(ktime_get_boottime(), *waketime); 847 } 848 if (delta > 0) 849 udelay(delta); 850 } 851 EXPORT_SYMBOL(dvb_frontend_sleep_until); 852 853 static int dvb_frontend_start(struct dvb_frontend *fe) 854 { 855 int ret; 856 struct dvb_frontend_private *fepriv = fe->frontend_priv; 857 struct task_struct *fe_thread; 858 859 dev_dbg(fe->dvb->device, "%s:\n", __func__); 860 861 if (fepriv->thread) { 862 if (fe->exit == DVB_FE_NO_EXIT) 863 return 0; 864 else 865 dvb_frontend_stop(fe); 866 } 867 868 if (signal_pending(current)) 869 return -EINTR; 870 if (down_interruptible(&fepriv->sem)) 871 return -EINTR; 872 873 fepriv->state = FESTATE_IDLE; 874 fe->exit = DVB_FE_NO_EXIT; 875 fepriv->thread = NULL; 876 mb(); 877 878 fe_thread = kthread_run(dvb_frontend_thread, fe, 879 "kdvb-ad-%i-fe-%i", fe->dvb->num, fe->id); 880 if (IS_ERR(fe_thread)) { 881 ret = PTR_ERR(fe_thread); 882 dev_warn(fe->dvb->device, 883 "dvb_frontend_start: failed to start kthread (%d)\n", 884 ret); 885 up(&fepriv->sem); 886 return ret; 887 } 888 fepriv->thread = fe_thread; 889 return 0; 890 } 891 892 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe, 893 u32 *freq_min, u32 *freq_max, 894 u32 *tolerance) 895 { 896 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 897 u32 tuner_min = fe->ops.tuner_ops.info.frequency_min_hz; 898 u32 tuner_max = fe->ops.tuner_ops.info.frequency_max_hz; 899 u32 frontend_min = fe->ops.info.frequency_min_hz; 900 u32 frontend_max = fe->ops.info.frequency_max_hz; 901 902 *freq_min = max(frontend_min, tuner_min); 903 904 if (frontend_max == 0) 905 *freq_max = tuner_max; 906 else if (tuner_max == 0) 907 *freq_max = frontend_max; 908 else 909 *freq_max = min(frontend_max, tuner_max); 910 911 if (*freq_min == 0 || *freq_max == 0) 912 dev_warn(fe->dvb->device, 913 "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n", 914 fe->dvb->num, fe->id); 915 916 dev_dbg(fe->dvb->device, "frequency interval: tuner: %u...%u, frontend: %u...%u", 917 tuner_min, tuner_max, frontend_min, frontend_max); 918 919 /* If the standard is for satellite, convert frequencies to kHz */ 920 switch (c->delivery_system) { 921 case SYS_DVBS: 922 case SYS_DVBS2: 923 case SYS_TURBO: 924 case SYS_ISDBS: 925 *freq_min /= kHz; 926 *freq_max /= kHz; 927 if (tolerance) 928 *tolerance = fe->ops.info.frequency_tolerance_hz / kHz; 929 930 break; 931 default: 932 if (tolerance) 933 *tolerance = fe->ops.info.frequency_tolerance_hz; 934 break; 935 } 936 } 937 938 static u32 dvb_frontend_get_stepsize(struct dvb_frontend *fe) 939 { 940 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 941 u32 fe_step = fe->ops.info.frequency_stepsize_hz; 942 u32 tuner_step = fe->ops.tuner_ops.info.frequency_step_hz; 943 u32 step = max(fe_step, tuner_step); 944 945 switch (c->delivery_system) { 946 case SYS_DVBS: 947 case SYS_DVBS2: 948 case SYS_TURBO: 949 case SYS_ISDBS: 950 step /= kHz; 951 break; 952 default: 953 break; 954 } 955 956 return step; 957 } 958 959 static int dvb_frontend_check_parameters(struct dvb_frontend *fe) 960 { 961 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 962 u32 freq_min; 963 u32 freq_max; 964 965 /* range check: frequency */ 966 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max, NULL); 967 if ((freq_min && c->frequency < freq_min) || 968 (freq_max && c->frequency > freq_max)) { 969 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n", 970 fe->dvb->num, fe->id, c->frequency, 971 freq_min, freq_max); 972 return -EINVAL; 973 } 974 975 /* range check: symbol rate */ 976 switch (c->delivery_system) { 977 case SYS_DVBS: 978 case SYS_DVBS2: 979 case SYS_TURBO: 980 case SYS_DVBC_ANNEX_A: 981 case SYS_DVBC_ANNEX_C: 982 if ((fe->ops.info.symbol_rate_min && 983 c->symbol_rate < fe->ops.info.symbol_rate_min) || 984 (fe->ops.info.symbol_rate_max && 985 c->symbol_rate > fe->ops.info.symbol_rate_max)) { 986 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", 987 fe->dvb->num, fe->id, c->symbol_rate, 988 fe->ops.info.symbol_rate_min, 989 fe->ops.info.symbol_rate_max); 990 return -EINVAL; 991 } 992 break; 993 default: 994 break; 995 } 996 997 return 0; 998 } 999 1000 static int dvb_frontend_clear_cache(struct dvb_frontend *fe) 1001 { 1002 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1003 int i; 1004 u32 delsys; 1005 1006 delsys = c->delivery_system; 1007 memset(c, 0, offsetof(struct dtv_frontend_properties, strength)); 1008 c->delivery_system = delsys; 1009 1010 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n", 1011 __func__, c->delivery_system); 1012 1013 c->transmission_mode = TRANSMISSION_MODE_AUTO; 1014 c->bandwidth_hz = 0; /* AUTO */ 1015 c->guard_interval = GUARD_INTERVAL_AUTO; 1016 c->hierarchy = HIERARCHY_AUTO; 1017 c->symbol_rate = 0; 1018 c->code_rate_HP = FEC_AUTO; 1019 c->code_rate_LP = FEC_AUTO; 1020 c->fec_inner = FEC_AUTO; 1021 c->rolloff = ROLLOFF_AUTO; 1022 c->voltage = SEC_VOLTAGE_OFF; 1023 c->sectone = SEC_TONE_OFF; 1024 c->pilot = PILOT_AUTO; 1025 1026 c->isdbt_partial_reception = 0; 1027 c->isdbt_sb_mode = 0; 1028 c->isdbt_sb_subchannel = 0; 1029 c->isdbt_sb_segment_idx = 0; 1030 c->isdbt_sb_segment_count = 0; 1031 c->isdbt_layer_enabled = 7; /* All layers (A,B,C) */ 1032 for (i = 0; i < 3; i++) { 1033 c->layer[i].fec = FEC_AUTO; 1034 c->layer[i].modulation = QAM_AUTO; 1035 c->layer[i].interleaving = 0; 1036 c->layer[i].segment_count = 0; 1037 } 1038 1039 c->stream_id = NO_STREAM_ID_FILTER; 1040 c->scrambling_sequence_index = 0;/* default sequence */ 1041 1042 switch (c->delivery_system) { 1043 case SYS_DVBS: 1044 case SYS_DVBS2: 1045 case SYS_TURBO: 1046 c->modulation = QPSK; /* implied for DVB-S in legacy API */ 1047 c->rolloff = ROLLOFF_35;/* implied for DVB-S */ 1048 break; 1049 case SYS_ATSC: 1050 c->modulation = VSB_8; 1051 break; 1052 case SYS_ISDBS: 1053 c->symbol_rate = 28860000; 1054 c->rolloff = ROLLOFF_35; 1055 c->bandwidth_hz = c->symbol_rate / 100 * 135; 1056 break; 1057 default: 1058 c->modulation = QAM_AUTO; 1059 break; 1060 } 1061 1062 c->lna = LNA_AUTO; 1063 1064 return 0; 1065 } 1066 1067 #define _DTV_CMD(n) \ 1068 [n] = #n 1069 1070 static char *dtv_cmds[DTV_MAX_COMMAND + 1] = { 1071 _DTV_CMD(DTV_TUNE), 1072 _DTV_CMD(DTV_CLEAR), 1073 1074 /* Set */ 1075 _DTV_CMD(DTV_FREQUENCY), 1076 _DTV_CMD(DTV_BANDWIDTH_HZ), 1077 _DTV_CMD(DTV_MODULATION), 1078 _DTV_CMD(DTV_INVERSION), 1079 _DTV_CMD(DTV_DISEQC_MASTER), 1080 _DTV_CMD(DTV_SYMBOL_RATE), 1081 _DTV_CMD(DTV_INNER_FEC), 1082 _DTV_CMD(DTV_VOLTAGE), 1083 _DTV_CMD(DTV_TONE), 1084 _DTV_CMD(DTV_PILOT), 1085 _DTV_CMD(DTV_ROLLOFF), 1086 _DTV_CMD(DTV_DELIVERY_SYSTEM), 1087 _DTV_CMD(DTV_HIERARCHY), 1088 _DTV_CMD(DTV_CODE_RATE_HP), 1089 _DTV_CMD(DTV_CODE_RATE_LP), 1090 _DTV_CMD(DTV_GUARD_INTERVAL), 1091 _DTV_CMD(DTV_TRANSMISSION_MODE), 1092 _DTV_CMD(DTV_INTERLEAVING), 1093 1094 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION), 1095 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING), 1096 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID), 1097 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX), 1098 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT), 1099 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED), 1100 _DTV_CMD(DTV_ISDBT_LAYERA_FEC), 1101 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION), 1102 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT), 1103 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING), 1104 _DTV_CMD(DTV_ISDBT_LAYERB_FEC), 1105 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION), 1106 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT), 1107 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING), 1108 _DTV_CMD(DTV_ISDBT_LAYERC_FEC), 1109 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION), 1110 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT), 1111 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING), 1112 1113 _DTV_CMD(DTV_STREAM_ID), 1114 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY), 1115 _DTV_CMD(DTV_SCRAMBLING_SEQUENCE_INDEX), 1116 _DTV_CMD(DTV_LNA), 1117 1118 /* Get */ 1119 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY), 1120 _DTV_CMD(DTV_API_VERSION), 1121 1122 _DTV_CMD(DTV_ENUM_DELSYS), 1123 1124 _DTV_CMD(DTV_ATSCMH_PARADE_ID), 1125 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE), 1126 1127 _DTV_CMD(DTV_ATSCMH_FIC_VER), 1128 _DTV_CMD(DTV_ATSCMH_NOG), 1129 _DTV_CMD(DTV_ATSCMH_TNOG), 1130 _DTV_CMD(DTV_ATSCMH_SGN), 1131 _DTV_CMD(DTV_ATSCMH_PRC), 1132 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE), 1133 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI), 1134 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC), 1135 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE), 1136 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A), 1137 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B), 1138 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C), 1139 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D), 1140 1141 /* Statistics API */ 1142 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH), 1143 _DTV_CMD(DTV_STAT_CNR), 1144 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT), 1145 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT), 1146 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT), 1147 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT), 1148 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT), 1149 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT), 1150 }; 1151 1152 static char *dtv_cmd_name(u32 cmd) 1153 { 1154 cmd = array_index_nospec(cmd, DTV_MAX_COMMAND); 1155 return dtv_cmds[cmd]; 1156 } 1157 1158 /* Synchronise the legacy tuning parameters into the cache, so that demodulator 1159 * drivers can use a single set_frontend tuning function, regardless of whether 1160 * it's being used for the legacy or new API, reducing code and complexity. 1161 */ 1162 static int dtv_property_cache_sync(struct dvb_frontend *fe, 1163 struct dtv_frontend_properties *c, 1164 const struct dvb_frontend_parameters *p) 1165 { 1166 c->frequency = p->frequency; 1167 c->inversion = p->inversion; 1168 1169 switch (dvbv3_type(c->delivery_system)) { 1170 case DVBV3_QPSK: 1171 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1172 c->symbol_rate = p->u.qpsk.symbol_rate; 1173 c->fec_inner = p->u.qpsk.fec_inner; 1174 break; 1175 case DVBV3_QAM: 1176 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1177 c->symbol_rate = p->u.qam.symbol_rate; 1178 c->fec_inner = p->u.qam.fec_inner; 1179 c->modulation = p->u.qam.modulation; 1180 break; 1181 case DVBV3_OFDM: 1182 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1183 1184 switch (p->u.ofdm.bandwidth) { 1185 case BANDWIDTH_10_MHZ: 1186 c->bandwidth_hz = 10000000; 1187 break; 1188 case BANDWIDTH_8_MHZ: 1189 c->bandwidth_hz = 8000000; 1190 break; 1191 case BANDWIDTH_7_MHZ: 1192 c->bandwidth_hz = 7000000; 1193 break; 1194 case BANDWIDTH_6_MHZ: 1195 c->bandwidth_hz = 6000000; 1196 break; 1197 case BANDWIDTH_5_MHZ: 1198 c->bandwidth_hz = 5000000; 1199 break; 1200 case BANDWIDTH_1_712_MHZ: 1201 c->bandwidth_hz = 1712000; 1202 break; 1203 case BANDWIDTH_AUTO: 1204 c->bandwidth_hz = 0; 1205 } 1206 1207 c->code_rate_HP = p->u.ofdm.code_rate_HP; 1208 c->code_rate_LP = p->u.ofdm.code_rate_LP; 1209 c->modulation = p->u.ofdm.constellation; 1210 c->transmission_mode = p->u.ofdm.transmission_mode; 1211 c->guard_interval = p->u.ofdm.guard_interval; 1212 c->hierarchy = p->u.ofdm.hierarchy_information; 1213 break; 1214 case DVBV3_ATSC: 1215 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__); 1216 c->modulation = p->u.vsb.modulation; 1217 if (c->delivery_system == SYS_ATSCMH) 1218 break; 1219 if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) 1220 c->delivery_system = SYS_ATSC; 1221 else 1222 c->delivery_system = SYS_DVBC_ANNEX_B; 1223 break; 1224 case DVBV3_UNKNOWN: 1225 dev_err(fe->dvb->device, 1226 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1227 __func__, c->delivery_system); 1228 return -EINVAL; 1229 } 1230 1231 return 0; 1232 } 1233 1234 /* Ensure the cached values are set correctly in the frontend 1235 * legacy tuning structures, for the advanced tuning API. 1236 */ 1237 static int 1238 dtv_property_legacy_params_sync(struct dvb_frontend *fe, 1239 const struct dtv_frontend_properties *c, 1240 struct dvb_frontend_parameters *p) 1241 { 1242 p->frequency = c->frequency; 1243 p->inversion = c->inversion; 1244 1245 switch (dvbv3_type(c->delivery_system)) { 1246 case DVBV3_UNKNOWN: 1247 dev_err(fe->dvb->device, 1248 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1249 __func__, c->delivery_system); 1250 return -EINVAL; 1251 case DVBV3_QPSK: 1252 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1253 p->u.qpsk.symbol_rate = c->symbol_rate; 1254 p->u.qpsk.fec_inner = c->fec_inner; 1255 break; 1256 case DVBV3_QAM: 1257 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1258 p->u.qam.symbol_rate = c->symbol_rate; 1259 p->u.qam.fec_inner = c->fec_inner; 1260 p->u.qam.modulation = c->modulation; 1261 break; 1262 case DVBV3_OFDM: 1263 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1264 switch (c->bandwidth_hz) { 1265 case 10000000: 1266 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ; 1267 break; 1268 case 8000000: 1269 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1270 break; 1271 case 7000000: 1272 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1273 break; 1274 case 6000000: 1275 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1276 break; 1277 case 5000000: 1278 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ; 1279 break; 1280 case 1712000: 1281 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ; 1282 break; 1283 case 0: 1284 default: 1285 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1286 } 1287 p->u.ofdm.code_rate_HP = c->code_rate_HP; 1288 p->u.ofdm.code_rate_LP = c->code_rate_LP; 1289 p->u.ofdm.constellation = c->modulation; 1290 p->u.ofdm.transmission_mode = c->transmission_mode; 1291 p->u.ofdm.guard_interval = c->guard_interval; 1292 p->u.ofdm.hierarchy_information = c->hierarchy; 1293 break; 1294 case DVBV3_ATSC: 1295 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__); 1296 p->u.vsb.modulation = c->modulation; 1297 break; 1298 } 1299 return 0; 1300 } 1301 1302 /** 1303 * dtv_get_frontend - calls a callback for retrieving DTV parameters 1304 * @fe: struct dvb_frontend pointer 1305 * @c: struct dtv_frontend_properties pointer (DVBv5 cache) 1306 * @p_out: struct dvb_frontend_parameters pointer (DVBv3 FE struct) 1307 * 1308 * This routine calls either the DVBv3 or DVBv5 get_frontend call. 1309 * If c is not null, it will update the DVBv5 cache struct pointed by it. 1310 * If p_out is not null, it will update the DVBv3 params pointed by it. 1311 */ 1312 static int dtv_get_frontend(struct dvb_frontend *fe, 1313 struct dtv_frontend_properties *c, 1314 struct dvb_frontend_parameters *p_out) 1315 { 1316 int r; 1317 1318 if (fe->ops.get_frontend) { 1319 r = fe->ops.get_frontend(fe, c); 1320 if (unlikely(r < 0)) 1321 return r; 1322 if (p_out) 1323 dtv_property_legacy_params_sync(fe, c, p_out); 1324 return 0; 1325 } 1326 1327 /* As everything is in cache, get_frontend fops are always supported */ 1328 return 0; 1329 } 1330 1331 static int dvb_frontend_handle_ioctl(struct file *file, 1332 unsigned int cmd, void *parg); 1333 1334 static int dtv_property_process_get(struct dvb_frontend *fe, 1335 const struct dtv_frontend_properties *c, 1336 struct dtv_property *tvp, 1337 struct file *file) 1338 { 1339 int ncaps; 1340 unsigned int len = 1; 1341 1342 switch (tvp->cmd) { 1343 case DTV_ENUM_DELSYS: 1344 ncaps = 0; 1345 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1346 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps]; 1347 ncaps++; 1348 } 1349 tvp->u.buffer.len = ncaps; 1350 len = ncaps; 1351 break; 1352 case DTV_FREQUENCY: 1353 tvp->u.data = c->frequency; 1354 break; 1355 case DTV_MODULATION: 1356 tvp->u.data = c->modulation; 1357 break; 1358 case DTV_BANDWIDTH_HZ: 1359 tvp->u.data = c->bandwidth_hz; 1360 break; 1361 case DTV_INVERSION: 1362 tvp->u.data = c->inversion; 1363 break; 1364 case DTV_SYMBOL_RATE: 1365 tvp->u.data = c->symbol_rate; 1366 break; 1367 case DTV_INNER_FEC: 1368 tvp->u.data = c->fec_inner; 1369 break; 1370 case DTV_PILOT: 1371 tvp->u.data = c->pilot; 1372 break; 1373 case DTV_ROLLOFF: 1374 tvp->u.data = c->rolloff; 1375 break; 1376 case DTV_DELIVERY_SYSTEM: 1377 tvp->u.data = c->delivery_system; 1378 break; 1379 case DTV_VOLTAGE: 1380 tvp->u.data = c->voltage; 1381 break; 1382 case DTV_TONE: 1383 tvp->u.data = c->sectone; 1384 break; 1385 case DTV_API_VERSION: 1386 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; 1387 break; 1388 case DTV_CODE_RATE_HP: 1389 tvp->u.data = c->code_rate_HP; 1390 break; 1391 case DTV_CODE_RATE_LP: 1392 tvp->u.data = c->code_rate_LP; 1393 break; 1394 case DTV_GUARD_INTERVAL: 1395 tvp->u.data = c->guard_interval; 1396 break; 1397 case DTV_TRANSMISSION_MODE: 1398 tvp->u.data = c->transmission_mode; 1399 break; 1400 case DTV_HIERARCHY: 1401 tvp->u.data = c->hierarchy; 1402 break; 1403 case DTV_INTERLEAVING: 1404 tvp->u.data = c->interleaving; 1405 break; 1406 1407 /* ISDB-T Support here */ 1408 case DTV_ISDBT_PARTIAL_RECEPTION: 1409 tvp->u.data = c->isdbt_partial_reception; 1410 break; 1411 case DTV_ISDBT_SOUND_BROADCASTING: 1412 tvp->u.data = c->isdbt_sb_mode; 1413 break; 1414 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1415 tvp->u.data = c->isdbt_sb_subchannel; 1416 break; 1417 case DTV_ISDBT_SB_SEGMENT_IDX: 1418 tvp->u.data = c->isdbt_sb_segment_idx; 1419 break; 1420 case DTV_ISDBT_SB_SEGMENT_COUNT: 1421 tvp->u.data = c->isdbt_sb_segment_count; 1422 break; 1423 case DTV_ISDBT_LAYER_ENABLED: 1424 tvp->u.data = c->isdbt_layer_enabled; 1425 break; 1426 case DTV_ISDBT_LAYERA_FEC: 1427 tvp->u.data = c->layer[0].fec; 1428 break; 1429 case DTV_ISDBT_LAYERA_MODULATION: 1430 tvp->u.data = c->layer[0].modulation; 1431 break; 1432 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1433 tvp->u.data = c->layer[0].segment_count; 1434 break; 1435 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1436 tvp->u.data = c->layer[0].interleaving; 1437 break; 1438 case DTV_ISDBT_LAYERB_FEC: 1439 tvp->u.data = c->layer[1].fec; 1440 break; 1441 case DTV_ISDBT_LAYERB_MODULATION: 1442 tvp->u.data = c->layer[1].modulation; 1443 break; 1444 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1445 tvp->u.data = c->layer[1].segment_count; 1446 break; 1447 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1448 tvp->u.data = c->layer[1].interleaving; 1449 break; 1450 case DTV_ISDBT_LAYERC_FEC: 1451 tvp->u.data = c->layer[2].fec; 1452 break; 1453 case DTV_ISDBT_LAYERC_MODULATION: 1454 tvp->u.data = c->layer[2].modulation; 1455 break; 1456 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1457 tvp->u.data = c->layer[2].segment_count; 1458 break; 1459 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1460 tvp->u.data = c->layer[2].interleaving; 1461 break; 1462 1463 /* Multistream support */ 1464 case DTV_STREAM_ID: 1465 case DTV_DVBT2_PLP_ID_LEGACY: 1466 tvp->u.data = c->stream_id; 1467 break; 1468 1469 /* Physical layer scrambling support */ 1470 case DTV_SCRAMBLING_SEQUENCE_INDEX: 1471 tvp->u.data = c->scrambling_sequence_index; 1472 break; 1473 1474 /* ATSC-MH */ 1475 case DTV_ATSCMH_FIC_VER: 1476 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver; 1477 break; 1478 case DTV_ATSCMH_PARADE_ID: 1479 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id; 1480 break; 1481 case DTV_ATSCMH_NOG: 1482 tvp->u.data = fe->dtv_property_cache.atscmh_nog; 1483 break; 1484 case DTV_ATSCMH_TNOG: 1485 tvp->u.data = fe->dtv_property_cache.atscmh_tnog; 1486 break; 1487 case DTV_ATSCMH_SGN: 1488 tvp->u.data = fe->dtv_property_cache.atscmh_sgn; 1489 break; 1490 case DTV_ATSCMH_PRC: 1491 tvp->u.data = fe->dtv_property_cache.atscmh_prc; 1492 break; 1493 case DTV_ATSCMH_RS_FRAME_MODE: 1494 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode; 1495 break; 1496 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1497 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble; 1498 break; 1499 case DTV_ATSCMH_RS_CODE_MODE_PRI: 1500 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri; 1501 break; 1502 case DTV_ATSCMH_RS_CODE_MODE_SEC: 1503 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec; 1504 break; 1505 case DTV_ATSCMH_SCCC_BLOCK_MODE: 1506 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode; 1507 break; 1508 case DTV_ATSCMH_SCCC_CODE_MODE_A: 1509 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a; 1510 break; 1511 case DTV_ATSCMH_SCCC_CODE_MODE_B: 1512 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b; 1513 break; 1514 case DTV_ATSCMH_SCCC_CODE_MODE_C: 1515 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c; 1516 break; 1517 case DTV_ATSCMH_SCCC_CODE_MODE_D: 1518 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d; 1519 break; 1520 1521 case DTV_LNA: 1522 tvp->u.data = c->lna; 1523 break; 1524 1525 /* Fill quality measures */ 1526 case DTV_STAT_SIGNAL_STRENGTH: 1527 tvp->u.st = c->strength; 1528 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32)) 1529 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32); 1530 len = tvp->u.buffer.len; 1531 break; 1532 case DTV_STAT_CNR: 1533 tvp->u.st = c->cnr; 1534 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32)) 1535 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32); 1536 len = tvp->u.buffer.len; 1537 break; 1538 case DTV_STAT_PRE_ERROR_BIT_COUNT: 1539 tvp->u.st = c->pre_bit_error; 1540 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32)) 1541 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32); 1542 len = tvp->u.buffer.len; 1543 break; 1544 case DTV_STAT_PRE_TOTAL_BIT_COUNT: 1545 tvp->u.st = c->pre_bit_count; 1546 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32)) 1547 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32); 1548 len = tvp->u.buffer.len; 1549 break; 1550 case DTV_STAT_POST_ERROR_BIT_COUNT: 1551 tvp->u.st = c->post_bit_error; 1552 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32)) 1553 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32); 1554 len = tvp->u.buffer.len; 1555 break; 1556 case DTV_STAT_POST_TOTAL_BIT_COUNT: 1557 tvp->u.st = c->post_bit_count; 1558 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32)) 1559 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32); 1560 len = tvp->u.buffer.len; 1561 break; 1562 case DTV_STAT_ERROR_BLOCK_COUNT: 1563 tvp->u.st = c->block_error; 1564 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32)) 1565 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32); 1566 len = tvp->u.buffer.len; 1567 break; 1568 case DTV_STAT_TOTAL_BLOCK_COUNT: 1569 tvp->u.st = c->block_count; 1570 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32)) 1571 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32); 1572 len = tvp->u.buffer.len; 1573 break; 1574 default: 1575 dev_dbg(fe->dvb->device, 1576 "%s: FE property %d doesn't exist\n", 1577 __func__, tvp->cmd); 1578 return -EINVAL; 1579 } 1580 1581 if (len < 1) 1582 len = 1; 1583 1584 dev_dbg(fe->dvb->device, 1585 "%s: GET cmd 0x%08x (%s) len %d: %*ph\n", 1586 __func__, tvp->cmd, dtv_cmd_name(tvp->cmd), 1587 tvp->u.buffer.len, tvp->u.buffer.len, tvp->u.buffer.data); 1588 1589 return 0; 1590 } 1591 1592 static int dtv_set_frontend(struct dvb_frontend *fe); 1593 1594 static bool is_dvbv3_delsys(u32 delsys) 1595 { 1596 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) || 1597 (delsys == SYS_DVBS) || (delsys == SYS_ATSC); 1598 } 1599 1600 /** 1601 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type 1602 * @fe: struct frontend; 1603 * @delsys: DVBv5 type that will be used for emulation 1604 * 1605 * Provides emulation for delivery systems that are compatible with the old 1606 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows 1607 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontend 1608 * parameters are compatible with DVB-S spec. 1609 */ 1610 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys) 1611 { 1612 int i; 1613 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1614 1615 c->delivery_system = delsys; 1616 1617 /* 1618 * If the call is for ISDB-T, put it into full-seg, auto mode, TV 1619 */ 1620 if (c->delivery_system == SYS_ISDBT) { 1621 dev_dbg(fe->dvb->device, 1622 "%s: Using defaults for SYS_ISDBT\n", 1623 __func__); 1624 1625 if (!c->bandwidth_hz) 1626 c->bandwidth_hz = 6000000; 1627 1628 c->isdbt_partial_reception = 0; 1629 c->isdbt_sb_mode = 0; 1630 c->isdbt_sb_subchannel = 0; 1631 c->isdbt_sb_segment_idx = 0; 1632 c->isdbt_sb_segment_count = 0; 1633 c->isdbt_layer_enabled = 7; 1634 for (i = 0; i < 3; i++) { 1635 c->layer[i].fec = FEC_AUTO; 1636 c->layer[i].modulation = QAM_AUTO; 1637 c->layer[i].interleaving = 0; 1638 c->layer[i].segment_count = 0; 1639 } 1640 } 1641 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n", 1642 __func__, c->delivery_system); 1643 1644 return 0; 1645 } 1646 1647 /** 1648 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call 1649 * @fe: frontend struct 1650 * @desired_system: delivery system requested by the user 1651 * 1652 * A DVBv5 call know what's the desired system it wants. So, set it. 1653 * 1654 * There are, however, a few known issues with early DVBv5 applications that 1655 * are also handled by this logic: 1656 * 1657 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system. 1658 * This is an API violation, but, as we don't want to break userspace, 1659 * convert it to the first supported delivery system. 1660 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for 1661 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of 1662 * ISDB-T provided backward compat with DVB-T. 1663 */ 1664 static int dvbv5_set_delivery_system(struct dvb_frontend *fe, 1665 u32 desired_system) 1666 { 1667 int ncaps; 1668 u32 delsys = SYS_UNDEFINED; 1669 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1670 enum dvbv3_emulation_type type; 1671 1672 /* 1673 * It was reported that some old DVBv5 applications were 1674 * filling delivery_system with SYS_UNDEFINED. If this happens, 1675 * assume that the application wants to use the first supported 1676 * delivery system. 1677 */ 1678 if (desired_system == SYS_UNDEFINED) 1679 desired_system = fe->ops.delsys[0]; 1680 1681 /* 1682 * This is a DVBv5 call. So, it likely knows the supported 1683 * delivery systems. So, check if the desired delivery system is 1684 * supported 1685 */ 1686 ncaps = 0; 1687 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1688 if (fe->ops.delsys[ncaps] == desired_system) { 1689 c->delivery_system = desired_system; 1690 dev_dbg(fe->dvb->device, 1691 "%s: Changing delivery system to %d\n", 1692 __func__, desired_system); 1693 return 0; 1694 } 1695 ncaps++; 1696 } 1697 1698 /* 1699 * The requested delivery system isn't supported. Maybe userspace 1700 * is requesting a DVBv3 compatible delivery system. 1701 * 1702 * The emulation only works if the desired system is one of the 1703 * delivery systems supported by DVBv3 API 1704 */ 1705 if (!is_dvbv3_delsys(desired_system)) { 1706 dev_dbg(fe->dvb->device, 1707 "%s: Delivery system %d not supported.\n", 1708 __func__, desired_system); 1709 return -EINVAL; 1710 } 1711 1712 type = dvbv3_type(desired_system); 1713 1714 /* 1715 * Get the last non-DVBv3 delivery system that has the same type 1716 * of the desired system 1717 */ 1718 ncaps = 0; 1719 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1720 if (dvbv3_type(fe->ops.delsys[ncaps]) == type) 1721 delsys = fe->ops.delsys[ncaps]; 1722 ncaps++; 1723 } 1724 1725 /* There's nothing compatible with the desired delivery system */ 1726 if (delsys == SYS_UNDEFINED) { 1727 dev_dbg(fe->dvb->device, 1728 "%s: Delivery system %d not supported on emulation mode.\n", 1729 __func__, desired_system); 1730 return -EINVAL; 1731 } 1732 1733 dev_dbg(fe->dvb->device, 1734 "%s: Using delivery system %d emulated as if it were %d\n", 1735 __func__, delsys, desired_system); 1736 1737 return emulate_delivery_system(fe, desired_system); 1738 } 1739 1740 /** 1741 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call 1742 * @fe: frontend struct 1743 * 1744 * A DVBv3 call doesn't know what's the desired system it wants. It also 1745 * doesn't allow to switch between different types. Due to that, userspace 1746 * should use DVBv5 instead. 1747 * However, in order to avoid breaking userspace API, limited backward 1748 * compatibility support is provided. 1749 * 1750 * There are some delivery systems that are incompatible with DVBv3 calls. 1751 * 1752 * This routine should work fine for frontends that support just one delivery 1753 * system. 1754 * 1755 * For frontends that support multiple frontends: 1756 * 1) It defaults to use the first supported delivery system. There's an 1757 * userspace application that allows changing it at runtime; 1758 * 1759 * 2) If the current delivery system is not compatible with DVBv3, it gets 1760 * the first one that it is compatible. 1761 * 1762 * NOTE: in order for this to work with applications like Kaffeine that 1763 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to 1764 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the 1765 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back 1766 * to DVB-S. 1767 */ 1768 static int dvbv3_set_delivery_system(struct dvb_frontend *fe) 1769 { 1770 int ncaps; 1771 u32 delsys = SYS_UNDEFINED; 1772 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1773 1774 /* If not set yet, defaults to the first supported delivery system */ 1775 if (c->delivery_system == SYS_UNDEFINED) 1776 c->delivery_system = fe->ops.delsys[0]; 1777 1778 /* 1779 * Trivial case: just use the current one, if it already a DVBv3 1780 * delivery system 1781 */ 1782 if (is_dvbv3_delsys(c->delivery_system)) { 1783 dev_dbg(fe->dvb->device, 1784 "%s: Using delivery system to %d\n", 1785 __func__, c->delivery_system); 1786 return 0; 1787 } 1788 1789 /* 1790 * Seek for the first delivery system that it is compatible with a 1791 * DVBv3 standard 1792 */ 1793 ncaps = 0; 1794 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1795 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) { 1796 delsys = fe->ops.delsys[ncaps]; 1797 break; 1798 } 1799 ncaps++; 1800 } 1801 if (delsys == SYS_UNDEFINED) { 1802 dev_dbg(fe->dvb->device, 1803 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n", 1804 __func__); 1805 return -EINVAL; 1806 } 1807 return emulate_delivery_system(fe, delsys); 1808 } 1809 1810 static void prepare_tuning_algo_parameters(struct dvb_frontend *fe) 1811 { 1812 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1813 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1814 struct dvb_frontend_tune_settings fetunesettings = { 0 }; 1815 1816 /* get frontend-specific tuning settings */ 1817 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { 1818 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; 1819 fepriv->max_drift = fetunesettings.max_drift; 1820 fepriv->step_size = fetunesettings.step_size; 1821 } else { 1822 /* default values */ 1823 switch (c->delivery_system) { 1824 case SYS_DVBS: 1825 case SYS_DVBS2: 1826 case SYS_ISDBS: 1827 case SYS_TURBO: 1828 case SYS_DVBC_ANNEX_A: 1829 case SYS_DVBC_ANNEX_C: 1830 fepriv->min_delay = HZ / 20; 1831 fepriv->step_size = c->symbol_rate / 16000; 1832 fepriv->max_drift = c->symbol_rate / 2000; 1833 break; 1834 case SYS_DVBT: 1835 case SYS_DVBT2: 1836 case SYS_ISDBT: 1837 case SYS_DTMB: 1838 fepriv->min_delay = HZ / 20; 1839 fepriv->step_size = dvb_frontend_get_stepsize(fe) * 2; 1840 fepriv->max_drift = fepriv->step_size + 1; 1841 break; 1842 default: 1843 /* 1844 * FIXME: This sounds wrong! if freqency_stepsize is 1845 * defined by the frontend, why not use it??? 1846 */ 1847 fepriv->min_delay = HZ / 20; 1848 fepriv->step_size = 0; /* no zigzag */ 1849 fepriv->max_drift = 0; 1850 break; 1851 } 1852 } 1853 if (dvb_override_tune_delay > 0) 1854 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; 1855 } 1856 1857 /** 1858 * dtv_property_process_set - Sets a single DTV property 1859 * @fe: Pointer to &struct dvb_frontend 1860 * @file: Pointer to &struct file 1861 * @cmd: Digital TV command 1862 * @data: An unsigned 32-bits number 1863 * 1864 * This routine assigns the property 1865 * value to the corresponding member of 1866 * &struct dtv_frontend_properties 1867 * 1868 * Returns: 1869 * Zero on success, negative errno on failure. 1870 */ 1871 static int dtv_property_process_set(struct dvb_frontend *fe, 1872 struct file *file, 1873 u32 cmd, u32 data) 1874 { 1875 int r = 0; 1876 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1877 1878 /** Dump DTV command name and value*/ 1879 if (!cmd || cmd > DTV_MAX_COMMAND) 1880 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n", 1881 __func__, cmd); 1882 else 1883 dev_dbg(fe->dvb->device, 1884 "%s: SET cmd 0x%08x (%s) to 0x%08x\n", 1885 __func__, cmd, dtv_cmd_name(cmd), data); 1886 switch (cmd) { 1887 case DTV_CLEAR: 1888 /* 1889 * Reset a cache of data specific to the frontend here. This does 1890 * not effect hardware. 1891 */ 1892 dvb_frontend_clear_cache(fe); 1893 break; 1894 case DTV_TUNE: 1895 /* 1896 * Use the cached Digital TV properties to tune the 1897 * frontend 1898 */ 1899 dev_dbg(fe->dvb->device, 1900 "%s: Setting the frontend from property cache\n", 1901 __func__); 1902 1903 r = dtv_set_frontend(fe); 1904 break; 1905 case DTV_FREQUENCY: 1906 c->frequency = data; 1907 break; 1908 case DTV_MODULATION: 1909 c->modulation = data; 1910 break; 1911 case DTV_BANDWIDTH_HZ: 1912 c->bandwidth_hz = data; 1913 break; 1914 case DTV_INVERSION: 1915 c->inversion = data; 1916 break; 1917 case DTV_SYMBOL_RATE: 1918 c->symbol_rate = data; 1919 break; 1920 case DTV_INNER_FEC: 1921 c->fec_inner = data; 1922 break; 1923 case DTV_PILOT: 1924 c->pilot = data; 1925 break; 1926 case DTV_ROLLOFF: 1927 c->rolloff = data; 1928 break; 1929 case DTV_DELIVERY_SYSTEM: 1930 r = dvbv5_set_delivery_system(fe, data); 1931 break; 1932 case DTV_VOLTAGE: 1933 c->voltage = data; 1934 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE, 1935 (void *)c->voltage); 1936 break; 1937 case DTV_TONE: 1938 c->sectone = data; 1939 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE, 1940 (void *)c->sectone); 1941 break; 1942 case DTV_CODE_RATE_HP: 1943 c->code_rate_HP = data; 1944 break; 1945 case DTV_CODE_RATE_LP: 1946 c->code_rate_LP = data; 1947 break; 1948 case DTV_GUARD_INTERVAL: 1949 c->guard_interval = data; 1950 break; 1951 case DTV_TRANSMISSION_MODE: 1952 c->transmission_mode = data; 1953 break; 1954 case DTV_HIERARCHY: 1955 c->hierarchy = data; 1956 break; 1957 case DTV_INTERLEAVING: 1958 c->interleaving = data; 1959 break; 1960 1961 /* ISDB-T Support here */ 1962 case DTV_ISDBT_PARTIAL_RECEPTION: 1963 c->isdbt_partial_reception = data; 1964 break; 1965 case DTV_ISDBT_SOUND_BROADCASTING: 1966 c->isdbt_sb_mode = data; 1967 break; 1968 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1969 c->isdbt_sb_subchannel = data; 1970 break; 1971 case DTV_ISDBT_SB_SEGMENT_IDX: 1972 c->isdbt_sb_segment_idx = data; 1973 break; 1974 case DTV_ISDBT_SB_SEGMENT_COUNT: 1975 c->isdbt_sb_segment_count = data; 1976 break; 1977 case DTV_ISDBT_LAYER_ENABLED: 1978 c->isdbt_layer_enabled = data; 1979 break; 1980 case DTV_ISDBT_LAYERA_FEC: 1981 c->layer[0].fec = data; 1982 break; 1983 case DTV_ISDBT_LAYERA_MODULATION: 1984 c->layer[0].modulation = data; 1985 break; 1986 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1987 c->layer[0].segment_count = data; 1988 break; 1989 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1990 c->layer[0].interleaving = data; 1991 break; 1992 case DTV_ISDBT_LAYERB_FEC: 1993 c->layer[1].fec = data; 1994 break; 1995 case DTV_ISDBT_LAYERB_MODULATION: 1996 c->layer[1].modulation = data; 1997 break; 1998 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1999 c->layer[1].segment_count = data; 2000 break; 2001 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 2002 c->layer[1].interleaving = data; 2003 break; 2004 case DTV_ISDBT_LAYERC_FEC: 2005 c->layer[2].fec = data; 2006 break; 2007 case DTV_ISDBT_LAYERC_MODULATION: 2008 c->layer[2].modulation = data; 2009 break; 2010 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 2011 c->layer[2].segment_count = data; 2012 break; 2013 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 2014 c->layer[2].interleaving = data; 2015 break; 2016 2017 /* Multistream support */ 2018 case DTV_STREAM_ID: 2019 case DTV_DVBT2_PLP_ID_LEGACY: 2020 c->stream_id = data; 2021 break; 2022 2023 /* Physical layer scrambling support */ 2024 case DTV_SCRAMBLING_SEQUENCE_INDEX: 2025 c->scrambling_sequence_index = data; 2026 break; 2027 2028 /* ATSC-MH */ 2029 case DTV_ATSCMH_PARADE_ID: 2030 fe->dtv_property_cache.atscmh_parade_id = data; 2031 break; 2032 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 2033 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data; 2034 break; 2035 2036 case DTV_LNA: 2037 c->lna = data; 2038 if (fe->ops.set_lna) 2039 r = fe->ops.set_lna(fe); 2040 if (r < 0) 2041 c->lna = LNA_AUTO; 2042 break; 2043 2044 default: 2045 return -EINVAL; 2046 } 2047 2048 return r; 2049 } 2050 2051 static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd, 2052 void *parg) 2053 { 2054 struct dvb_device *dvbdev = file->private_data; 2055 struct dvb_frontend *fe = dvbdev->priv; 2056 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2057 int err; 2058 2059 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd)); 2060 if (down_interruptible(&fepriv->sem)) 2061 return -ERESTARTSYS; 2062 2063 if (fe->exit != DVB_FE_NO_EXIT) { 2064 up(&fepriv->sem); 2065 return -ENODEV; 2066 } 2067 2068 /* 2069 * If the frontend is opened in read-only mode, only the ioctls 2070 * that don't interfere with the tune logic should be accepted. 2071 * That allows an external application to monitor the DVB QoS and 2072 * statistics parameters. 2073 * 2074 * That matches all _IOR() ioctls, except for two special cases: 2075 * - FE_GET_EVENT is part of the tuning logic on a DVB application; 2076 * - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0 2077 * setup 2078 * So, those two ioctls should also return -EPERM, as otherwise 2079 * reading from them would interfere with a DVB tune application 2080 */ 2081 if ((file->f_flags & O_ACCMODE) == O_RDONLY 2082 && (_IOC_DIR(cmd) != _IOC_READ 2083 || cmd == FE_GET_EVENT 2084 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) { 2085 up(&fepriv->sem); 2086 return -EPERM; 2087 } 2088 2089 err = dvb_frontend_handle_ioctl(file, cmd, parg); 2090 2091 up(&fepriv->sem); 2092 return err; 2093 } 2094 2095 static long dvb_frontend_ioctl(struct file *file, unsigned int cmd, 2096 unsigned long arg) 2097 { 2098 struct dvb_device *dvbdev = file->private_data; 2099 2100 if (!dvbdev) 2101 return -ENODEV; 2102 2103 return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl); 2104 } 2105 2106 #ifdef CONFIG_COMPAT 2107 struct compat_dtv_property { 2108 __u32 cmd; 2109 __u32 reserved[3]; 2110 union { 2111 __u32 data; 2112 struct dtv_fe_stats st; 2113 struct { 2114 __u8 data[32]; 2115 __u32 len; 2116 __u32 reserved1[3]; 2117 compat_uptr_t reserved2; 2118 } buffer; 2119 } u; 2120 int result; 2121 } __attribute__ ((packed)); 2122 2123 struct compat_dtv_properties { 2124 __u32 num; 2125 compat_uptr_t props; 2126 }; 2127 2128 #define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties) 2129 #define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties) 2130 2131 static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd, 2132 unsigned long arg) 2133 { 2134 struct dvb_device *dvbdev = file->private_data; 2135 struct dvb_frontend *fe = dvbdev->priv; 2136 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2137 int i, err = 0; 2138 2139 if (cmd == COMPAT_FE_SET_PROPERTY) { 2140 struct compat_dtv_properties prop, *tvps = NULL; 2141 struct compat_dtv_property *tvp = NULL; 2142 2143 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop))) 2144 return -EFAULT; 2145 2146 tvps = ∝ 2147 2148 /* 2149 * Put an arbitrary limit on the number of messages that can 2150 * be sent at once 2151 */ 2152 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2153 return -EINVAL; 2154 2155 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp)); 2156 if (IS_ERR(tvp)) 2157 return PTR_ERR(tvp); 2158 2159 for (i = 0; i < tvps->num; i++) { 2160 err = dtv_property_process_set(fe, file, 2161 (tvp + i)->cmd, 2162 (tvp + i)->u.data); 2163 if (err < 0) { 2164 kfree(tvp); 2165 return err; 2166 } 2167 } 2168 kfree(tvp); 2169 } else if (cmd == COMPAT_FE_GET_PROPERTY) { 2170 struct compat_dtv_properties prop, *tvps = NULL; 2171 struct compat_dtv_property *tvp = NULL; 2172 struct dtv_frontend_properties getp = fe->dtv_property_cache; 2173 2174 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop))) 2175 return -EFAULT; 2176 2177 tvps = ∝ 2178 2179 /* 2180 * Put an arbitrary limit on the number of messages that can 2181 * be sent at once 2182 */ 2183 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2184 return -EINVAL; 2185 2186 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp)); 2187 if (IS_ERR(tvp)) 2188 return PTR_ERR(tvp); 2189 2190 /* 2191 * Let's use our own copy of property cache, in order to 2192 * avoid mangling with DTV zigzag logic, as drivers might 2193 * return crap, if they don't check if the data is available 2194 * before updating the properties cache. 2195 */ 2196 if (fepriv->state != FESTATE_IDLE) { 2197 err = dtv_get_frontend(fe, &getp, NULL); 2198 if (err < 0) { 2199 kfree(tvp); 2200 return err; 2201 } 2202 } 2203 for (i = 0; i < tvps->num; i++) { 2204 err = dtv_property_process_get( 2205 fe, &getp, (struct dtv_property *)(tvp + i), file); 2206 if (err < 0) { 2207 kfree(tvp); 2208 return err; 2209 } 2210 } 2211 2212 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp, 2213 tvps->num * sizeof(struct compat_dtv_property))) { 2214 kfree(tvp); 2215 return -EFAULT; 2216 } 2217 kfree(tvp); 2218 } 2219 2220 return err; 2221 } 2222 2223 static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd, 2224 unsigned long arg) 2225 { 2226 struct dvb_device *dvbdev = file->private_data; 2227 struct dvb_frontend *fe = dvbdev->priv; 2228 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2229 int err; 2230 2231 if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) { 2232 if (down_interruptible(&fepriv->sem)) 2233 return -ERESTARTSYS; 2234 2235 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg); 2236 2237 up(&fepriv->sem); 2238 return err; 2239 } 2240 2241 return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2242 } 2243 #endif 2244 2245 static int dtv_set_frontend(struct dvb_frontend *fe) 2246 { 2247 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2248 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2249 u32 rolloff = 0; 2250 2251 if (dvb_frontend_check_parameters(fe) < 0) 2252 return -EINVAL; 2253 2254 /* 2255 * Initialize output parameters to match the values given by 2256 * the user. FE_SET_FRONTEND triggers an initial frontend event 2257 * with status = 0, which copies output parameters to userspace. 2258 */ 2259 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out); 2260 2261 /* 2262 * Be sure that the bandwidth will be filled for all 2263 * non-satellite systems, as tuners need to know what 2264 * low pass/Nyquist half filter should be applied, in 2265 * order to avoid inter-channel noise. 2266 * 2267 * ISDB-T and DVB-T/T2 already sets bandwidth. 2268 * ATSC and DVB-C don't set, so, the core should fill it. 2269 * 2270 * On DVB-C Annex A and C, the bandwidth is a function of 2271 * the roll-off and symbol rate. Annex B defines different 2272 * roll-off factors depending on the modulation. Fortunately, 2273 * Annex B is only used with 6MHz, so there's no need to 2274 * calculate it. 2275 * 2276 * While not officially supported, a side effect of handling it at 2277 * the cache level is that a program could retrieve the bandwidth 2278 * via DTV_BANDWIDTH_HZ, which may be useful for test programs. 2279 */ 2280 switch (c->delivery_system) { 2281 case SYS_ATSC: 2282 case SYS_DVBC_ANNEX_B: 2283 c->bandwidth_hz = 6000000; 2284 break; 2285 case SYS_DVBC_ANNEX_A: 2286 rolloff = 115; 2287 break; 2288 case SYS_DVBC_ANNEX_C: 2289 rolloff = 113; 2290 break; 2291 case SYS_DVBS: 2292 case SYS_TURBO: 2293 case SYS_ISDBS: 2294 rolloff = 135; 2295 break; 2296 case SYS_DVBS2: 2297 switch (c->rolloff) { 2298 case ROLLOFF_20: 2299 rolloff = 120; 2300 break; 2301 case ROLLOFF_25: 2302 rolloff = 125; 2303 break; 2304 default: 2305 case ROLLOFF_35: 2306 rolloff = 135; 2307 } 2308 break; 2309 default: 2310 break; 2311 } 2312 if (rolloff) 2313 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100); 2314 2315 /* force auto frequency inversion if requested */ 2316 if (dvb_force_auto_inversion) 2317 c->inversion = INVERSION_AUTO; 2318 2319 /* 2320 * without hierarchical coding code_rate_LP is irrelevant, 2321 * so we tolerate the otherwise invalid FEC_NONE setting 2322 */ 2323 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE) 2324 c->code_rate_LP = FEC_AUTO; 2325 2326 prepare_tuning_algo_parameters(fe); 2327 2328 fepriv->state = FESTATE_RETUNE; 2329 2330 /* Request the search algorithm to search */ 2331 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 2332 2333 dvb_frontend_clear_events(fe); 2334 dvb_frontend_add_event(fe, 0); 2335 dvb_frontend_wakeup(fe); 2336 fepriv->status = 0; 2337 2338 return 0; 2339 } 2340 2341 static int dvb_get_property(struct dvb_frontend *fe, struct file *file, 2342 struct dtv_properties *tvps) 2343 { 2344 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2345 struct dtv_property *tvp = NULL; 2346 struct dtv_frontend_properties getp; 2347 int i, err; 2348 2349 memcpy(&getp, &fe->dtv_property_cache, sizeof(getp)); 2350 2351 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", 2352 __func__, tvps->num); 2353 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", 2354 __func__, tvps->props); 2355 2356 /* 2357 * Put an arbitrary limit on the number of messages that can 2358 * be sent at once 2359 */ 2360 if (!tvps->num || tvps->num > DTV_IOCTL_MAX_MSGS) 2361 return -EINVAL; 2362 2363 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp)); 2364 if (IS_ERR(tvp)) 2365 return PTR_ERR(tvp); 2366 2367 /* 2368 * Let's use our own copy of property cache, in order to 2369 * avoid mangling with DTV zigzag logic, as drivers might 2370 * return crap, if they don't check if the data is available 2371 * before updating the properties cache. 2372 */ 2373 if (fepriv->state != FESTATE_IDLE) { 2374 err = dtv_get_frontend(fe, &getp, NULL); 2375 if (err < 0) 2376 goto out; 2377 } 2378 for (i = 0; i < tvps->num; i++) { 2379 err = dtv_property_process_get(fe, &getp, 2380 tvp + i, file); 2381 if (err < 0) 2382 goto out; 2383 } 2384 2385 if (copy_to_user((void __user *)tvps->props, tvp, 2386 tvps->num * sizeof(struct dtv_property))) { 2387 err = -EFAULT; 2388 goto out; 2389 } 2390 2391 err = 0; 2392 out: 2393 kfree(tvp); 2394 return err; 2395 } 2396 2397 static int dvb_get_frontend(struct dvb_frontend *fe, 2398 struct dvb_frontend_parameters *p_out) 2399 { 2400 struct dtv_frontend_properties getp; 2401 2402 /* 2403 * Let's use our own copy of property cache, in order to 2404 * avoid mangling with DTV zigzag logic, as drivers might 2405 * return crap, if they don't check if the data is available 2406 * before updating the properties cache. 2407 */ 2408 memcpy(&getp, &fe->dtv_property_cache, sizeof(getp)); 2409 2410 return dtv_get_frontend(fe, &getp, p_out); 2411 } 2412 2413 static int dvb_frontend_handle_ioctl(struct file *file, 2414 unsigned int cmd, void *parg) 2415 { 2416 struct dvb_device *dvbdev = file->private_data; 2417 struct dvb_frontend *fe = dvbdev->priv; 2418 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2419 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2420 int i, err = -ENOTSUPP; 2421 2422 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2423 2424 switch (cmd) { 2425 case FE_SET_PROPERTY: { 2426 struct dtv_properties *tvps = parg; 2427 struct dtv_property *tvp = NULL; 2428 2429 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", 2430 __func__, tvps->num); 2431 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", 2432 __func__, tvps->props); 2433 2434 /* 2435 * Put an arbitrary limit on the number of messages that can 2436 * be sent at once 2437 */ 2438 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2439 return -EINVAL; 2440 2441 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp)); 2442 if (IS_ERR(tvp)) 2443 return PTR_ERR(tvp); 2444 2445 for (i = 0; i < tvps->num; i++) { 2446 err = dtv_property_process_set(fe, file, 2447 (tvp + i)->cmd, 2448 (tvp + i)->u.data); 2449 if (err < 0) { 2450 kfree(tvp); 2451 return err; 2452 } 2453 } 2454 kfree(tvp); 2455 err = 0; 2456 break; 2457 } 2458 case FE_GET_PROPERTY: 2459 err = dvb_get_property(fe, file, parg); 2460 break; 2461 2462 case FE_GET_INFO: { 2463 struct dvb_frontend_info *info = parg; 2464 memset(info, 0, sizeof(*info)); 2465 2466 strscpy(info->name, fe->ops.info.name, sizeof(info->name)); 2467 info->symbol_rate_min = fe->ops.info.symbol_rate_min; 2468 info->symbol_rate_max = fe->ops.info.symbol_rate_max; 2469 info->symbol_rate_tolerance = fe->ops.info.symbol_rate_tolerance; 2470 info->caps = fe->ops.info.caps; 2471 info->frequency_stepsize = dvb_frontend_get_stepsize(fe); 2472 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, 2473 &info->frequency_max, 2474 &info->frequency_tolerance); 2475 2476 /* 2477 * Associate the 4 delivery systems supported by DVBv3 2478 * API with their DVBv5 counterpart. For the other standards, 2479 * use the closest type, assuming that it would hopefully 2480 * work with a DVBv3 application. 2481 * It should be noticed that, on multi-frontend devices with 2482 * different types (terrestrial and cable, for example), 2483 * a pure DVBv3 application won't be able to use all delivery 2484 * systems. Yet, changing the DVBv5 cache to the other delivery 2485 * system should be enough for making it work. 2486 */ 2487 switch (dvbv3_type(c->delivery_system)) { 2488 case DVBV3_QPSK: 2489 info->type = FE_QPSK; 2490 break; 2491 case DVBV3_ATSC: 2492 info->type = FE_ATSC; 2493 break; 2494 case DVBV3_QAM: 2495 info->type = FE_QAM; 2496 break; 2497 case DVBV3_OFDM: 2498 info->type = FE_OFDM; 2499 break; 2500 default: 2501 dev_err(fe->dvb->device, 2502 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 2503 __func__, c->delivery_system); 2504 info->type = FE_OFDM; 2505 } 2506 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n", 2507 __func__, c->delivery_system, info->type); 2508 2509 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */ 2510 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) 2511 info->caps |= FE_CAN_INVERSION_AUTO; 2512 err = 0; 2513 break; 2514 } 2515 2516 case FE_READ_STATUS: { 2517 enum fe_status *status = parg; 2518 2519 /* if retune was requested but hasn't occurred yet, prevent 2520 * that user get signal state from previous tuning */ 2521 if (fepriv->state == FESTATE_RETUNE || 2522 fepriv->state == FESTATE_ERROR) { 2523 err = 0; 2524 *status = 0; 2525 break; 2526 } 2527 2528 if (fe->ops.read_status) 2529 err = fe->ops.read_status(fe, status); 2530 break; 2531 } 2532 2533 case FE_DISEQC_RESET_OVERLOAD: 2534 if (fe->ops.diseqc_reset_overload) { 2535 err = fe->ops.diseqc_reset_overload(fe); 2536 fepriv->state = FESTATE_DISEQC; 2537 fepriv->status = 0; 2538 } 2539 break; 2540 2541 case FE_DISEQC_SEND_MASTER_CMD: 2542 if (fe->ops.diseqc_send_master_cmd) { 2543 struct dvb_diseqc_master_cmd *cmd = parg; 2544 2545 if (cmd->msg_len > sizeof(cmd->msg)) { 2546 err = -EINVAL; 2547 break; 2548 } 2549 err = fe->ops.diseqc_send_master_cmd(fe, cmd); 2550 fepriv->state = FESTATE_DISEQC; 2551 fepriv->status = 0; 2552 } 2553 break; 2554 2555 case FE_DISEQC_SEND_BURST: 2556 if (fe->ops.diseqc_send_burst) { 2557 err = fe->ops.diseqc_send_burst(fe, (long)parg); 2558 fepriv->state = FESTATE_DISEQC; 2559 fepriv->status = 0; 2560 } 2561 break; 2562 2563 case FE_SET_TONE: 2564 if (fe->ops.set_tone) { 2565 fepriv->tone = (long)parg; 2566 err = fe->ops.set_tone(fe, fepriv->tone); 2567 fepriv->state = FESTATE_DISEQC; 2568 fepriv->status = 0; 2569 } 2570 break; 2571 2572 case FE_SET_VOLTAGE: 2573 if (fe->ops.set_voltage) { 2574 fepriv->voltage = (long)parg; 2575 err = fe->ops.set_voltage(fe, fepriv->voltage); 2576 fepriv->state = FESTATE_DISEQC; 2577 fepriv->status = 0; 2578 } 2579 break; 2580 2581 case FE_DISEQC_RECV_SLAVE_REPLY: 2582 if (fe->ops.diseqc_recv_slave_reply) 2583 err = fe->ops.diseqc_recv_slave_reply(fe, parg); 2584 break; 2585 2586 case FE_ENABLE_HIGH_LNB_VOLTAGE: 2587 if (fe->ops.enable_high_lnb_voltage) 2588 err = fe->ops.enable_high_lnb_voltage(fe, (long)parg); 2589 break; 2590 2591 case FE_SET_FRONTEND_TUNE_MODE: 2592 fepriv->tune_mode_flags = (unsigned long)parg; 2593 err = 0; 2594 break; 2595 /* DEPRECATED dish control ioctls */ 2596 2597 case FE_DISHNETWORK_SEND_LEGACY_CMD: 2598 if (fe->ops.dishnetwork_send_legacy_command) { 2599 err = fe->ops.dishnetwork_send_legacy_command(fe, 2600 (unsigned long)parg); 2601 fepriv->state = FESTATE_DISEQC; 2602 fepriv->status = 0; 2603 } else if (fe->ops.set_voltage) { 2604 /* 2605 * NOTE: This is a fallback condition. Some frontends 2606 * (stv0299 for instance) take longer than 8msec to 2607 * respond to a set_voltage command. Those switches 2608 * need custom routines to switch properly. For all 2609 * other frontends, the following should work ok. 2610 * Dish network legacy switches (as used by Dish500) 2611 * are controlled by sending 9-bit command words 2612 * spaced 8msec apart. 2613 * the actual command word is switch/port dependent 2614 * so it is up to the userspace application to send 2615 * the right command. 2616 * The command must always start with a '0' after 2617 * initialization, so parg is 8 bits and does not 2618 * include the initialization or start bit 2619 */ 2620 unsigned long swcmd = ((unsigned long)parg) << 1; 2621 ktime_t nexttime; 2622 ktime_t tv[10]; 2623 int i; 2624 u8 last = 1; 2625 2626 if (dvb_frontend_debug) 2627 dprintk("switch command: 0x%04lx\n", 2628 swcmd); 2629 nexttime = ktime_get_boottime(); 2630 if (dvb_frontend_debug) 2631 tv[0] = nexttime; 2632 /* before sending a command, initialize by sending 2633 * a 32ms 18V to the switch 2634 */ 2635 fe->ops.set_voltage(fe, SEC_VOLTAGE_18); 2636 dvb_frontend_sleep_until(&nexttime, 32000); 2637 2638 for (i = 0; i < 9; i++) { 2639 if (dvb_frontend_debug) 2640 tv[i + 1] = ktime_get_boottime(); 2641 if ((swcmd & 0x01) != last) { 2642 /* set voltage to (last ? 13V : 18V) */ 2643 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); 2644 last = (last) ? 0 : 1; 2645 } 2646 swcmd = swcmd >> 1; 2647 if (i != 8) 2648 dvb_frontend_sleep_until(&nexttime, 8000); 2649 } 2650 if (dvb_frontend_debug) { 2651 dprintk("(adapter %d): switch delay (should be 32k followed by all 8k)\n", 2652 fe->dvb->num); 2653 for (i = 1; i < 10; i++) 2654 pr_info("%d: %d\n", i, 2655 (int)ktime_us_delta(tv[i], tv[i - 1])); 2656 } 2657 err = 0; 2658 fepriv->state = FESTATE_DISEQC; 2659 fepriv->status = 0; 2660 } 2661 break; 2662 2663 /* DEPRECATED statistics ioctls */ 2664 2665 case FE_READ_BER: 2666 if (fe->ops.read_ber) { 2667 if (fepriv->thread) 2668 err = fe->ops.read_ber(fe, parg); 2669 else 2670 err = -EAGAIN; 2671 } 2672 break; 2673 2674 case FE_READ_SIGNAL_STRENGTH: 2675 if (fe->ops.read_signal_strength) { 2676 if (fepriv->thread) 2677 err = fe->ops.read_signal_strength(fe, parg); 2678 else 2679 err = -EAGAIN; 2680 } 2681 break; 2682 2683 case FE_READ_SNR: 2684 if (fe->ops.read_snr) { 2685 if (fepriv->thread) 2686 err = fe->ops.read_snr(fe, parg); 2687 else 2688 err = -EAGAIN; 2689 } 2690 break; 2691 2692 case FE_READ_UNCORRECTED_BLOCKS: 2693 if (fe->ops.read_ucblocks) { 2694 if (fepriv->thread) 2695 err = fe->ops.read_ucblocks(fe, parg); 2696 else 2697 err = -EAGAIN; 2698 } 2699 break; 2700 2701 /* DEPRECATED DVBv3 ioctls */ 2702 2703 case FE_SET_FRONTEND: 2704 err = dvbv3_set_delivery_system(fe); 2705 if (err) 2706 break; 2707 2708 err = dtv_property_cache_sync(fe, c, parg); 2709 if (err) 2710 break; 2711 err = dtv_set_frontend(fe); 2712 break; 2713 2714 case FE_GET_EVENT: 2715 err = dvb_frontend_get_event(fe, parg, file->f_flags); 2716 break; 2717 2718 case FE_GET_FRONTEND: 2719 err = dvb_get_frontend(fe, parg); 2720 break; 2721 2722 default: 2723 return -ENOTSUPP; 2724 } /* switch */ 2725 2726 return err; 2727 } 2728 2729 static __poll_t dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) 2730 { 2731 struct dvb_device *dvbdev = file->private_data; 2732 struct dvb_frontend *fe = dvbdev->priv; 2733 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2734 2735 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__); 2736 2737 poll_wait(file, &fepriv->events.wait_queue, wait); 2738 2739 if (fepriv->events.eventw != fepriv->events.eventr) 2740 return (EPOLLIN | EPOLLRDNORM | EPOLLPRI); 2741 2742 return 0; 2743 } 2744 2745 static int dvb_frontend_open(struct inode *inode, struct file *file) 2746 { 2747 struct dvb_device *dvbdev = file->private_data; 2748 struct dvb_frontend *fe = dvbdev->priv; 2749 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2750 struct dvb_adapter *adapter = fe->dvb; 2751 int ret; 2752 2753 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2754 if (fe->exit == DVB_FE_DEVICE_REMOVED) 2755 return -ENODEV; 2756 2757 if (adapter->mfe_shared) { 2758 mutex_lock(&adapter->mfe_lock); 2759 2760 if (!adapter->mfe_dvbdev) 2761 adapter->mfe_dvbdev = dvbdev; 2762 2763 else if (adapter->mfe_dvbdev != dvbdev) { 2764 struct dvb_device 2765 *mfedev = adapter->mfe_dvbdev; 2766 struct dvb_frontend 2767 *mfe = mfedev->priv; 2768 struct dvb_frontend_private 2769 *mfepriv = mfe->frontend_priv; 2770 int mferetry = (dvb_mfe_wait_time << 1); 2771 2772 mutex_unlock(&adapter->mfe_lock); 2773 while (mferetry-- && (mfedev->users != -1 || 2774 mfepriv->thread)) { 2775 if (msleep_interruptible(500)) { 2776 if (signal_pending(current)) 2777 return -EINTR; 2778 } 2779 } 2780 2781 mutex_lock(&adapter->mfe_lock); 2782 if (adapter->mfe_dvbdev != dvbdev) { 2783 mfedev = adapter->mfe_dvbdev; 2784 mfe = mfedev->priv; 2785 mfepriv = mfe->frontend_priv; 2786 if (mfedev->users != -1 || 2787 mfepriv->thread) { 2788 mutex_unlock(&adapter->mfe_lock); 2789 return -EBUSY; 2790 } 2791 adapter->mfe_dvbdev = dvbdev; 2792 } 2793 } 2794 } 2795 2796 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { 2797 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) 2798 goto err0; 2799 2800 /* If we took control of the bus, we need to force 2801 reinitialization. This is because many ts_bus_ctrl() 2802 functions strobe the RESET pin on the demod, and if the 2803 frontend thread already exists then the dvb_init() routine 2804 won't get called (which is what usually does initial 2805 register configuration). */ 2806 fepriv->reinitialise = 1; 2807 } 2808 2809 if ((ret = dvb_generic_open(inode, file)) < 0) 2810 goto err1; 2811 2812 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2813 /* normal tune mode when opened R/W */ 2814 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; 2815 fepriv->tone = -1; 2816 fepriv->voltage = -1; 2817 2818 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 2819 mutex_lock(&fe->dvb->mdev_lock); 2820 if (fe->dvb->mdev) { 2821 mutex_lock(&fe->dvb->mdev->graph_mutex); 2822 if (fe->dvb->mdev->enable_source) 2823 ret = fe->dvb->mdev->enable_source( 2824 dvbdev->entity, 2825 &fepriv->pipe); 2826 mutex_unlock(&fe->dvb->mdev->graph_mutex); 2827 if (ret) { 2828 mutex_unlock(&fe->dvb->mdev_lock); 2829 dev_err(fe->dvb->device, 2830 "Tuner is busy. Error %d\n", ret); 2831 goto err2; 2832 } 2833 } 2834 mutex_unlock(&fe->dvb->mdev_lock); 2835 #endif 2836 ret = dvb_frontend_start(fe); 2837 if (ret) 2838 goto err3; 2839 2840 /* empty event queue */ 2841 fepriv->events.eventr = fepriv->events.eventw = 0; 2842 } 2843 2844 dvb_frontend_get(fe); 2845 2846 if (adapter->mfe_shared) 2847 mutex_unlock(&adapter->mfe_lock); 2848 return ret; 2849 2850 err3: 2851 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 2852 mutex_lock(&fe->dvb->mdev_lock); 2853 if (fe->dvb->mdev) { 2854 mutex_lock(&fe->dvb->mdev->graph_mutex); 2855 if (fe->dvb->mdev->disable_source) 2856 fe->dvb->mdev->disable_source(dvbdev->entity); 2857 mutex_unlock(&fe->dvb->mdev->graph_mutex); 2858 } 2859 mutex_unlock(&fe->dvb->mdev_lock); 2860 err2: 2861 #endif 2862 dvb_generic_release(inode, file); 2863 err1: 2864 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) 2865 fe->ops.ts_bus_ctrl(fe, 0); 2866 err0: 2867 if (adapter->mfe_shared) 2868 mutex_unlock(&adapter->mfe_lock); 2869 return ret; 2870 } 2871 2872 static int dvb_frontend_release(struct inode *inode, struct file *file) 2873 { 2874 struct dvb_device *dvbdev = file->private_data; 2875 struct dvb_frontend *fe = dvbdev->priv; 2876 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2877 int ret; 2878 2879 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2880 2881 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2882 fepriv->release_jiffies = jiffies; 2883 mb(); 2884 } 2885 2886 ret = dvb_generic_release(inode, file); 2887 2888 if (dvbdev->users == -1) { 2889 wake_up(&fepriv->wait_queue); 2890 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 2891 mutex_lock(&fe->dvb->mdev_lock); 2892 if (fe->dvb->mdev) { 2893 mutex_lock(&fe->dvb->mdev->graph_mutex); 2894 if (fe->dvb->mdev->disable_source) 2895 fe->dvb->mdev->disable_source(dvbdev->entity); 2896 mutex_unlock(&fe->dvb->mdev->graph_mutex); 2897 } 2898 mutex_unlock(&fe->dvb->mdev_lock); 2899 #endif 2900 if (fe->exit != DVB_FE_NO_EXIT) 2901 wake_up(&dvbdev->wait_queue); 2902 if (fe->ops.ts_bus_ctrl) 2903 fe->ops.ts_bus_ctrl(fe, 0); 2904 } 2905 2906 dvb_frontend_put(fe); 2907 2908 return ret; 2909 } 2910 2911 static const struct file_operations dvb_frontend_fops = { 2912 .owner = THIS_MODULE, 2913 .unlocked_ioctl = dvb_frontend_ioctl, 2914 #ifdef CONFIG_COMPAT 2915 .compat_ioctl = dvb_frontend_compat_ioctl, 2916 #endif 2917 .poll = dvb_frontend_poll, 2918 .open = dvb_frontend_open, 2919 .release = dvb_frontend_release, 2920 .llseek = noop_llseek, 2921 }; 2922 2923 int dvb_frontend_suspend(struct dvb_frontend *fe) 2924 { 2925 int ret = 0; 2926 2927 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2928 fe->id); 2929 2930 if (fe->ops.tuner_ops.suspend) 2931 ret = fe->ops.tuner_ops.suspend(fe); 2932 else if (fe->ops.tuner_ops.sleep) 2933 ret = fe->ops.tuner_ops.sleep(fe); 2934 2935 if (fe->ops.suspend) 2936 ret = fe->ops.suspend(fe); 2937 else if (fe->ops.sleep) 2938 ret = fe->ops.sleep(fe); 2939 2940 return ret; 2941 } 2942 EXPORT_SYMBOL(dvb_frontend_suspend); 2943 2944 int dvb_frontend_resume(struct dvb_frontend *fe) 2945 { 2946 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2947 int ret = 0; 2948 2949 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2950 fe->id); 2951 2952 fe->exit = DVB_FE_DEVICE_RESUME; 2953 if (fe->ops.resume) 2954 ret = fe->ops.resume(fe); 2955 else if (fe->ops.init) 2956 ret = fe->ops.init(fe); 2957 2958 if (fe->ops.tuner_ops.resume) 2959 ret = fe->ops.tuner_ops.resume(fe); 2960 else if (fe->ops.tuner_ops.init) 2961 ret = fe->ops.tuner_ops.init(fe); 2962 2963 if (fe->ops.set_tone && fepriv->tone != -1) 2964 fe->ops.set_tone(fe, fepriv->tone); 2965 if (fe->ops.set_voltage && fepriv->voltage != -1) 2966 fe->ops.set_voltage(fe, fepriv->voltage); 2967 2968 fe->exit = DVB_FE_NO_EXIT; 2969 fepriv->state = FESTATE_RETUNE; 2970 dvb_frontend_wakeup(fe); 2971 2972 return ret; 2973 } 2974 EXPORT_SYMBOL(dvb_frontend_resume); 2975 2976 int dvb_register_frontend(struct dvb_adapter *dvb, 2977 struct dvb_frontend *fe) 2978 { 2979 struct dvb_frontend_private *fepriv; 2980 const struct dvb_device dvbdev_template = { 2981 .users = ~0, 2982 .writers = 1, 2983 .readers = (~0) - 1, 2984 .fops = &dvb_frontend_fops, 2985 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 2986 .name = fe->ops.info.name, 2987 #endif 2988 }; 2989 2990 dev_dbg(dvb->device, "%s:\n", __func__); 2991 2992 if (mutex_lock_interruptible(&frontend_mutex)) 2993 return -ERESTARTSYS; 2994 2995 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); 2996 if (!fe->frontend_priv) { 2997 mutex_unlock(&frontend_mutex); 2998 return -ENOMEM; 2999 } 3000 fepriv = fe->frontend_priv; 3001 3002 kref_init(&fe->refcount); 3003 3004 /* 3005 * After initialization, there need to be two references: one 3006 * for dvb_unregister_frontend(), and another one for 3007 * dvb_frontend_detach(). 3008 */ 3009 dvb_frontend_get(fe); 3010 3011 sema_init(&fepriv->sem, 1); 3012 init_waitqueue_head(&fepriv->wait_queue); 3013 init_waitqueue_head(&fepriv->events.wait_queue); 3014 mutex_init(&fepriv->events.mtx); 3015 fe->dvb = dvb; 3016 fepriv->inversion = INVERSION_OFF; 3017 3018 dev_info(fe->dvb->device, 3019 "DVB: registering adapter %i frontend %i (%s)...\n", 3020 fe->dvb->num, fe->id, fe->ops.info.name); 3021 3022 dvb_register_device(fe->dvb, &fepriv->dvbdev, &dvbdev_template, 3023 fe, DVB_DEVICE_FRONTEND, 0); 3024 3025 /* 3026 * Initialize the cache to the proper values according with the 3027 * first supported delivery system (ops->delsys[0]) 3028 */ 3029 3030 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0]; 3031 dvb_frontend_clear_cache(fe); 3032 3033 mutex_unlock(&frontend_mutex); 3034 return 0; 3035 } 3036 EXPORT_SYMBOL(dvb_register_frontend); 3037 3038 int dvb_unregister_frontend(struct dvb_frontend *fe) 3039 { 3040 struct dvb_frontend_private *fepriv = fe->frontend_priv; 3041 3042 dev_dbg(fe->dvb->device, "%s:\n", __func__); 3043 3044 mutex_lock(&frontend_mutex); 3045 dvb_frontend_stop(fe); 3046 dvb_remove_device(fepriv->dvbdev); 3047 3048 /* fe is invalid now */ 3049 mutex_unlock(&frontend_mutex); 3050 dvb_frontend_put(fe); 3051 return 0; 3052 } 3053 EXPORT_SYMBOL(dvb_unregister_frontend); 3054 3055 static void dvb_frontend_invoke_release(struct dvb_frontend *fe, 3056 void (*release)(struct dvb_frontend *fe)) 3057 { 3058 if (release) { 3059 release(fe); 3060 #ifdef CONFIG_MEDIA_ATTACH 3061 dvb_detach(release); 3062 #endif 3063 } 3064 } 3065 3066 void dvb_frontend_detach(struct dvb_frontend *fe) 3067 { 3068 dvb_frontend_invoke_release(fe, fe->ops.release_sec); 3069 dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release); 3070 dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release); 3071 dvb_frontend_put(fe); 3072 } 3073 EXPORT_SYMBOL(dvb_frontend_detach); 3074