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