1 /* 2 * dvb_frontend.c: DVB frontend tuning interface/thread 3 * 4 * 5 * Copyright (C) 1999-2001 Ralph Metzler 6 * Marcus Metzler 7 * Holger Waechtler 8 * for convergence integrated media GmbH 9 * 10 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup) 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License 14 * as published by the Free Software Foundation; either version 2 15 * of the License, or (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * To obtain the license, point your browser to 22 * http://www.gnu.org/copyleft/gpl.html 23 */ 24 25 /* Enables DVBv3 compatibility bits at the headers */ 26 #define __DVB_CORE__ 27 28 #define pr_fmt(fmt) "dvb_frontend: " fmt 29 30 #include <linux/string.h> 31 #include <linux/kernel.h> 32 #include <linux/sched/signal.h> 33 #include <linux/wait.h> 34 #include <linux/slab.h> 35 #include <linux/poll.h> 36 #include <linux/semaphore.h> 37 #include <linux/module.h> 38 #include <linux/list.h> 39 #include <linux/freezer.h> 40 #include <linux/jiffies.h> 41 #include <linux/kthread.h> 42 #include <linux/ktime.h> 43 #include <linux/compat.h> 44 #include <asm/processor.h> 45 46 #include <media/dvb_frontend.h> 47 #include <media/dvbdev.h> 48 #include <linux/dvb/version.h> 49 50 static int dvb_frontend_debug; 51 static int dvb_shutdown_timeout; 52 static int dvb_force_auto_inversion; 53 static int dvb_override_tune_delay; 54 static int dvb_powerdown_on_sleep = 1; 55 static int dvb_mfe_wait_time = 5; 56 57 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644); 58 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off)."); 59 module_param(dvb_shutdown_timeout, int, 0644); 60 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); 61 module_param(dvb_force_auto_inversion, int, 0644); 62 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); 63 module_param(dvb_override_tune_delay, int, 0644); 64 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt"); 65 module_param(dvb_powerdown_on_sleep, int, 0644); 66 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)"); 67 module_param(dvb_mfe_wait_time, int, 0644); 68 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)"); 69 70 #define dprintk(fmt, arg...) \ 71 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg) 72 73 #define FESTATE_IDLE 1 74 #define FESTATE_RETUNE 2 75 #define FESTATE_TUNING_FAST 4 76 #define FESTATE_TUNING_SLOW 8 77 #define FESTATE_TUNED 16 78 #define FESTATE_ZIGZAG_FAST 32 79 #define FESTATE_ZIGZAG_SLOW 64 80 #define FESTATE_DISEQC 128 81 #define FESTATE_ERROR 256 82 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) 83 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) 84 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) 85 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) 86 87 /* 88 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. 89 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. 90 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. 91 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. 92 * FESTATE_TUNED. The frontend has successfully locked on. 93 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. 94 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. 95 * FESTATE_DISEQC. A DISEQC command has just been issued. 96 * FESTATE_WAITFORLOCK. When we're waiting for a lock. 97 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. 98 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. 99 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. 100 */ 101 102 static DEFINE_MUTEX(frontend_mutex); 103 104 struct dvb_frontend_private { 105 /* thread/frontend values */ 106 struct dvb_device *dvbdev; 107 struct dvb_frontend_parameters parameters_out; 108 struct dvb_fe_events events; 109 struct semaphore sem; 110 struct list_head list_head; 111 wait_queue_head_t wait_queue; 112 struct task_struct *thread; 113 unsigned long release_jiffies; 114 unsigned int wakeup; 115 enum fe_status status; 116 unsigned long tune_mode_flags; 117 unsigned int delay; 118 unsigned int reinitialise; 119 int tone; 120 int voltage; 121 122 /* swzigzag values */ 123 unsigned int state; 124 unsigned int bending; 125 int lnb_drift; 126 unsigned int inversion; 127 unsigned int auto_step; 128 unsigned int auto_sub_step; 129 unsigned int started_auto_step; 130 unsigned int min_delay; 131 unsigned int max_drift; 132 unsigned int step_size; 133 int quality; 134 unsigned int check_wrapped; 135 enum dvbfe_search algo_status; 136 137 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 138 struct media_pipeline pipe; 139 #endif 140 }; 141 142 static void dvb_frontend_invoke_release(struct dvb_frontend *fe, 143 void (*release)(struct dvb_frontend *fe)); 144 145 static void __dvb_frontend_free(struct dvb_frontend *fe) 146 { 147 struct dvb_frontend_private *fepriv = fe->frontend_priv; 148 149 if (fepriv) 150 dvb_free_device(fepriv->dvbdev); 151 152 dvb_frontend_invoke_release(fe, fe->ops.release); 153 154 kfree(fepriv); 155 } 156 157 static void dvb_frontend_free(struct kref *ref) 158 { 159 struct dvb_frontend *fe = 160 container_of(ref, struct dvb_frontend, refcount); 161 162 __dvb_frontend_free(fe); 163 } 164 165 static void dvb_frontend_put(struct dvb_frontend *fe) 166 { 167 /* 168 * Check if the frontend was registered, as otherwise 169 * kref was not initialized yet. 170 */ 171 if (fe->frontend_priv) 172 kref_put(&fe->refcount, dvb_frontend_free); 173 else 174 __dvb_frontend_free(fe); 175 } 176 177 static void dvb_frontend_get(struct dvb_frontend *fe) 178 { 179 kref_get(&fe->refcount); 180 } 181 182 static void dvb_frontend_wakeup(struct dvb_frontend *fe); 183 static int dtv_get_frontend(struct dvb_frontend *fe, 184 struct dtv_frontend_properties *c, 185 struct dvb_frontend_parameters *p_out); 186 static int 187 dtv_property_legacy_params_sync(struct dvb_frontend *fe, 188 const struct dtv_frontend_properties *c, 189 struct dvb_frontend_parameters *p); 190 191 static bool has_get_frontend(struct dvb_frontend *fe) 192 { 193 return fe->ops.get_frontend; 194 } 195 196 /* 197 * Due to DVBv3 API calls, a delivery system should be mapped into one of 198 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC), 199 * otherwise, a DVBv3 call will fail. 200 */ 201 enum dvbv3_emulation_type { 202 DVBV3_UNKNOWN, 203 DVBV3_QPSK, 204 DVBV3_QAM, 205 DVBV3_OFDM, 206 DVBV3_ATSC, 207 }; 208 209 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system) 210 { 211 switch (delivery_system) { 212 case SYS_DVBC_ANNEX_A: 213 case SYS_DVBC_ANNEX_C: 214 return DVBV3_QAM; 215 case SYS_DVBS: 216 case SYS_DVBS2: 217 case SYS_TURBO: 218 case SYS_ISDBS: 219 case SYS_DSS: 220 return DVBV3_QPSK; 221 case SYS_DVBT: 222 case SYS_DVBT2: 223 case SYS_ISDBT: 224 case SYS_DTMB: 225 return DVBV3_OFDM; 226 case SYS_ATSC: 227 case SYS_ATSCMH: 228 case SYS_DVBC_ANNEX_B: 229 return DVBV3_ATSC; 230 case SYS_UNDEFINED: 231 case SYS_ISDBC: 232 case SYS_DVBH: 233 case SYS_DAB: 234 default: 235 /* 236 * Doesn't know how to emulate those types and/or 237 * there's no frontend driver from this type yet 238 * with some emulation code, so, we're not sure yet how 239 * to handle them, or they're not compatible with a DVBv3 call. 240 */ 241 return DVBV3_UNKNOWN; 242 } 243 } 244 245 static void dvb_frontend_add_event(struct dvb_frontend *fe, 246 enum fe_status status) 247 { 248 struct dvb_frontend_private *fepriv = fe->frontend_priv; 249 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 250 struct dvb_fe_events *events = &fepriv->events; 251 struct dvb_frontend_event *e; 252 int wp; 253 254 dev_dbg(fe->dvb->device, "%s:\n", __func__); 255 256 if ((status & FE_HAS_LOCK) && has_get_frontend(fe)) 257 dtv_get_frontend(fe, c, &fepriv->parameters_out); 258 259 mutex_lock(&events->mtx); 260 261 wp = (events->eventw + 1) % MAX_EVENT; 262 if (wp == events->eventr) { 263 events->overflow = 1; 264 events->eventr = (events->eventr + 1) % MAX_EVENT; 265 } 266 267 e = &events->events[events->eventw]; 268 e->status = status; 269 e->parameters = fepriv->parameters_out; 270 271 events->eventw = wp; 272 273 mutex_unlock(&events->mtx); 274 275 wake_up_interruptible(&events->wait_queue); 276 } 277 278 static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv, 279 struct dvb_fe_events *events) 280 { 281 int ret; 282 283 up(&fepriv->sem); 284 ret = events->eventw != events->eventr; 285 down(&fepriv->sem); 286 287 return ret; 288 } 289 290 static int dvb_frontend_get_event(struct dvb_frontend *fe, 291 struct dvb_frontend_event *event, int flags) 292 { 293 struct dvb_frontend_private *fepriv = fe->frontend_priv; 294 struct dvb_fe_events *events = &fepriv->events; 295 296 dev_dbg(fe->dvb->device, "%s:\n", __func__); 297 298 if (events->overflow) { 299 events->overflow = 0; 300 return -EOVERFLOW; 301 } 302 303 if (events->eventw == events->eventr) { 304 int ret; 305 306 if (flags & O_NONBLOCK) 307 return -EWOULDBLOCK; 308 309 ret = wait_event_interruptible(events->wait_queue, 310 dvb_frontend_test_event(fepriv, events)); 311 312 if (ret < 0) 313 return ret; 314 } 315 316 mutex_lock(&events->mtx); 317 *event = events->events[events->eventr]; 318 events->eventr = (events->eventr + 1) % MAX_EVENT; 319 mutex_unlock(&events->mtx); 320 321 return 0; 322 } 323 324 static void dvb_frontend_clear_events(struct dvb_frontend *fe) 325 { 326 struct dvb_frontend_private *fepriv = fe->frontend_priv; 327 struct dvb_fe_events *events = &fepriv->events; 328 329 mutex_lock(&events->mtx); 330 events->eventr = events->eventw; 331 mutex_unlock(&events->mtx); 332 } 333 334 static void dvb_frontend_init(struct dvb_frontend *fe) 335 { 336 dev_dbg(fe->dvb->device, 337 "%s: initialising adapter %i frontend %i (%s)...\n", 338 __func__, fe->dvb->num, fe->id, fe->ops.info.name); 339 340 if (fe->ops.init) 341 fe->ops.init(fe); 342 if (fe->ops.tuner_ops.init) { 343 if (fe->ops.i2c_gate_ctrl) 344 fe->ops.i2c_gate_ctrl(fe, 1); 345 fe->ops.tuner_ops.init(fe); 346 if (fe->ops.i2c_gate_ctrl) 347 fe->ops.i2c_gate_ctrl(fe, 0); 348 } 349 } 350 351 void dvb_frontend_reinitialise(struct dvb_frontend *fe) 352 { 353 struct dvb_frontend_private *fepriv = fe->frontend_priv; 354 355 fepriv->reinitialise = 1; 356 dvb_frontend_wakeup(fe); 357 } 358 EXPORT_SYMBOL(dvb_frontend_reinitialise); 359 360 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) 361 { 362 int q2; 363 struct dvb_frontend *fe = fepriv->dvbdev->priv; 364 365 dev_dbg(fe->dvb->device, "%s:\n", __func__); 366 367 if (locked) 368 (fepriv->quality) = (fepriv->quality * 220 + 36 * 256) / 256; 369 else 370 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; 371 372 q2 = fepriv->quality - 128; 373 q2 *= q2; 374 375 fepriv->delay = fepriv->min_delay + q2 * HZ / (128 * 128); 376 } 377 378 /** 379 * dvb_frontend_swzigzag_autotune - Performs automatic twiddling of frontend 380 * parameters. 381 * 382 * @fe: The frontend concerned. 383 * @check_wrapped: Checks if an iteration has completed. 384 * DO NOT SET ON THE FIRST ATTEMPT. 385 * 386 * return: Number of complete iterations that have been performed. 387 */ 388 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) 389 { 390 int autoinversion; 391 int ready = 0; 392 int fe_set_err = 0; 393 struct dvb_frontend_private *fepriv = fe->frontend_priv; 394 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 395 int original_inversion = c->inversion; 396 u32 original_frequency = c->frequency; 397 398 /* are we using autoinversion? */ 399 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 400 (c->inversion == INVERSION_AUTO)); 401 402 /* setup parameters correctly */ 403 while (!ready) { 404 /* calculate the lnb_drift */ 405 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; 406 407 /* wrap the auto_step if we've exceeded the maximum drift */ 408 if (fepriv->lnb_drift > fepriv->max_drift) { 409 fepriv->auto_step = 0; 410 fepriv->auto_sub_step = 0; 411 fepriv->lnb_drift = 0; 412 } 413 414 /* perform inversion and +/- zigzag */ 415 switch (fepriv->auto_sub_step) { 416 case 0: 417 /* try with the current inversion and current drift setting */ 418 ready = 1; 419 break; 420 421 case 1: 422 if (!autoinversion) break; 423 424 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 425 ready = 1; 426 break; 427 428 case 2: 429 if (fepriv->lnb_drift == 0) break; 430 431 fepriv->lnb_drift = -fepriv->lnb_drift; 432 ready = 1; 433 break; 434 435 case 3: 436 if (fepriv->lnb_drift == 0) break; 437 if (!autoinversion) break; 438 439 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 440 fepriv->lnb_drift = -fepriv->lnb_drift; 441 ready = 1; 442 break; 443 444 default: 445 fepriv->auto_step++; 446 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ 447 break; 448 } 449 450 if (!ready) fepriv->auto_sub_step++; 451 } 452 453 /* if this attempt would hit where we started, indicate a complete 454 * iteration has occurred */ 455 if ((fepriv->auto_step == fepriv->started_auto_step) && 456 (fepriv->auto_sub_step == 0) && check_wrapped) { 457 return 1; 458 } 459 460 dev_dbg(fe->dvb->device, 461 "%s: drift:%i inversion:%i auto_step:%i auto_sub_step:%i started_auto_step:%i\n", 462 __func__, fepriv->lnb_drift, fepriv->inversion, 463 fepriv->auto_step, fepriv->auto_sub_step, 464 fepriv->started_auto_step); 465 466 /* set the frontend itself */ 467 c->frequency += fepriv->lnb_drift; 468 if (autoinversion) 469 c->inversion = fepriv->inversion; 470 tmp = *c; 471 if (fe->ops.set_frontend) 472 fe_set_err = fe->ops.set_frontend(fe); 473 *c = tmp; 474 if (fe_set_err < 0) { 475 fepriv->state = FESTATE_ERROR; 476 return fe_set_err; 477 } 478 479 c->frequency = original_frequency; 480 c->inversion = original_inversion; 481 482 fepriv->auto_sub_step++; 483 return 0; 484 } 485 486 static void dvb_frontend_swzigzag(struct dvb_frontend *fe) 487 { 488 enum fe_status s = FE_NONE; 489 int retval = 0; 490 struct dvb_frontend_private *fepriv = fe->frontend_priv; 491 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 492 493 /* if we've got no parameters, just keep idling */ 494 if (fepriv->state & FESTATE_IDLE) { 495 fepriv->delay = 3 * HZ; 496 fepriv->quality = 0; 497 return; 498 } 499 500 /* in SCAN mode, we just set the frontend when asked and leave it alone */ 501 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { 502 if (fepriv->state & FESTATE_RETUNE) { 503 tmp = *c; 504 if (fe->ops.set_frontend) 505 retval = fe->ops.set_frontend(fe); 506 *c = tmp; 507 if (retval < 0) 508 fepriv->state = FESTATE_ERROR; 509 else 510 fepriv->state = FESTATE_TUNED; 511 } 512 fepriv->delay = 3 * HZ; 513 fepriv->quality = 0; 514 return; 515 } 516 517 /* get the frontend status */ 518 if (fepriv->state & FESTATE_RETUNE) { 519 s = 0; 520 } else { 521 if (fe->ops.read_status) 522 fe->ops.read_status(fe, &s); 523 if (s != fepriv->status) { 524 dvb_frontend_add_event(fe, s); 525 fepriv->status = s; 526 } 527 } 528 529 /* if we're not tuned, and we have a lock, move to the TUNED state */ 530 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { 531 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 532 fepriv->state = FESTATE_TUNED; 533 534 /* if we're tuned, then we have determined the correct inversion */ 535 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 536 (c->inversion == INVERSION_AUTO)) { 537 c->inversion = fepriv->inversion; 538 } 539 return; 540 } 541 542 /* if we are tuned already, check we're still locked */ 543 if (fepriv->state & FESTATE_TUNED) { 544 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 545 546 /* we're tuned, and the lock is still good... */ 547 if (s & FE_HAS_LOCK) { 548 return; 549 } else { /* if we _WERE_ tuned, but now don't have a lock */ 550 fepriv->state = FESTATE_ZIGZAG_FAST; 551 fepriv->started_auto_step = fepriv->auto_step; 552 fepriv->check_wrapped = 0; 553 } 554 } 555 556 /* don't actually do anything if we're in the LOSTLOCK state, 557 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ 558 if ((fepriv->state & FESTATE_LOSTLOCK) && 559 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { 560 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 561 return; 562 } 563 564 /* don't do anything if we're in the DISEQC state, since this 565 * might be someone with a motorized dish controlled by DISEQC. 566 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ 567 if (fepriv->state & FESTATE_DISEQC) { 568 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 569 return; 570 } 571 572 /* if we're in the RETUNE state, set everything up for a brand 573 * new scan, keeping the current inversion setting, as the next 574 * tune is _very_ likely to require the same */ 575 if (fepriv->state & FESTATE_RETUNE) { 576 fepriv->lnb_drift = 0; 577 fepriv->auto_step = 0; 578 fepriv->auto_sub_step = 0; 579 fepriv->started_auto_step = 0; 580 fepriv->check_wrapped = 0; 581 } 582 583 /* fast zigzag. */ 584 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { 585 fepriv->delay = fepriv->min_delay; 586 587 /* perform a tune */ 588 retval = dvb_frontend_swzigzag_autotune(fe, 589 fepriv->check_wrapped); 590 if (retval < 0) { 591 return; 592 } else if (retval) { 593 /* OK, if we've run out of trials at the fast speed. 594 * Drop back to slow for the _next_ attempt */ 595 fepriv->state = FESTATE_SEARCHING_SLOW; 596 fepriv->started_auto_step = fepriv->auto_step; 597 return; 598 } 599 fepriv->check_wrapped = 1; 600 601 /* if we've just re-tuned, enter the ZIGZAG_FAST state. 602 * This ensures we cannot return from an 603 * FE_SET_FRONTEND ioctl before the first frontend tune 604 * occurs */ 605 if (fepriv->state & FESTATE_RETUNE) { 606 fepriv->state = FESTATE_TUNING_FAST; 607 } 608 } 609 610 /* slow zigzag */ 611 if (fepriv->state & FESTATE_SEARCHING_SLOW) { 612 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 613 614 /* Note: don't bother checking for wrapping; we stay in this 615 * state until we get a lock */ 616 dvb_frontend_swzigzag_autotune(fe, 0); 617 } 618 } 619 620 static int dvb_frontend_is_exiting(struct dvb_frontend *fe) 621 { 622 struct dvb_frontend_private *fepriv = fe->frontend_priv; 623 624 if (fe->exit != DVB_FE_NO_EXIT) 625 return 1; 626 627 if (fepriv->dvbdev->writers == 1) 628 if (time_after_eq(jiffies, fepriv->release_jiffies + 629 dvb_shutdown_timeout * HZ)) 630 return 1; 631 632 return 0; 633 } 634 635 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) 636 { 637 struct dvb_frontend_private *fepriv = fe->frontend_priv; 638 639 if (fepriv->wakeup) { 640 fepriv->wakeup = 0; 641 return 1; 642 } 643 return dvb_frontend_is_exiting(fe); 644 } 645 646 static void dvb_frontend_wakeup(struct dvb_frontend *fe) 647 { 648 struct dvb_frontend_private *fepriv = fe->frontend_priv; 649 650 fepriv->wakeup = 1; 651 wake_up_interruptible(&fepriv->wait_queue); 652 } 653 654 static int dvb_frontend_thread(void *data) 655 { 656 struct dvb_frontend *fe = data; 657 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 658 struct dvb_frontend_private *fepriv = fe->frontend_priv; 659 enum fe_status s = FE_NONE; 660 enum dvbfe_algo algo; 661 bool re_tune = false; 662 bool semheld = false; 663 664 dev_dbg(fe->dvb->device, "%s:\n", __func__); 665 666 fepriv->check_wrapped = 0; 667 fepriv->quality = 0; 668 fepriv->delay = 3 * HZ; 669 fepriv->status = 0; 670 fepriv->wakeup = 0; 671 fepriv->reinitialise = 0; 672 673 dvb_frontend_init(fe); 674 675 set_freezable(); 676 while (1) { 677 up(&fepriv->sem); /* is locked when we enter the thread... */ 678 restart: 679 wait_event_interruptible_timeout(fepriv->wait_queue, 680 dvb_frontend_should_wakeup(fe) || 681 kthread_should_stop() || 682 freezing(current), 683 fepriv->delay); 684 685 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { 686 /* got signal or quitting */ 687 if (!down_interruptible(&fepriv->sem)) 688 semheld = true; 689 fe->exit = DVB_FE_NORMAL_EXIT; 690 break; 691 } 692 693 if (try_to_freeze()) 694 goto restart; 695 696 if (down_interruptible(&fepriv->sem)) 697 break; 698 699 if (fepriv->reinitialise) { 700 dvb_frontend_init(fe); 701 if (fe->ops.set_tone && fepriv->tone != -1) 702 fe->ops.set_tone(fe, fepriv->tone); 703 if (fe->ops.set_voltage && fepriv->voltage != -1) 704 fe->ops.set_voltage(fe, fepriv->voltage); 705 fepriv->reinitialise = 0; 706 } 707 708 /* do an iteration of the tuning loop */ 709 if (fe->ops.get_frontend_algo) { 710 algo = fe->ops.get_frontend_algo(fe); 711 switch (algo) { 712 case DVBFE_ALGO_HW: 713 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); 714 715 if (fepriv->state & FESTATE_RETUNE) { 716 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__); 717 re_tune = true; 718 fepriv->state = FESTATE_TUNED; 719 } else { 720 re_tune = false; 721 } 722 723 if (fe->ops.tune) 724 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s); 725 726 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { 727 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__); 728 dvb_frontend_add_event(fe, s); 729 fepriv->status = s; 730 } 731 break; 732 case DVBFE_ALGO_SW: 733 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); 734 dvb_frontend_swzigzag(fe); 735 break; 736 case DVBFE_ALGO_CUSTOM: 737 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); 738 if (fepriv->state & FESTATE_RETUNE) { 739 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__); 740 fepriv->state = FESTATE_TUNED; 741 } 742 /* Case where we are going to search for a carrier 743 * User asked us to retune again for some reason, possibly 744 * requesting a search with a new set of parameters 745 */ 746 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { 747 if (fe->ops.search) { 748 fepriv->algo_status = fe->ops.search(fe); 749 /* We did do a search as was requested, the flags are 750 * now unset as well and has the flags wrt to search. 751 */ 752 } else { 753 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; 754 } 755 } 756 /* Track the carrier if the search was successful */ 757 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) { 758 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 759 fepriv->delay = HZ / 2; 760 } 761 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out); 762 fe->ops.read_status(fe, &s); 763 if (s != fepriv->status) { 764 dvb_frontend_add_event(fe, s); /* update event list */ 765 fepriv->status = s; 766 if (!(s & FE_HAS_LOCK)) { 767 fepriv->delay = HZ / 10; 768 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 769 } else { 770 fepriv->delay = 60 * HZ; 771 } 772 } 773 break; 774 default: 775 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__); 776 break; 777 } 778 } else { 779 dvb_frontend_swzigzag(fe); 780 } 781 } 782 783 if (dvb_powerdown_on_sleep) { 784 if (fe->ops.set_voltage) 785 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); 786 if (fe->ops.tuner_ops.sleep) { 787 if (fe->ops.i2c_gate_ctrl) 788 fe->ops.i2c_gate_ctrl(fe, 1); 789 fe->ops.tuner_ops.sleep(fe); 790 if (fe->ops.i2c_gate_ctrl) 791 fe->ops.i2c_gate_ctrl(fe, 0); 792 } 793 if (fe->ops.sleep) 794 fe->ops.sleep(fe); 795 } 796 797 fepriv->thread = NULL; 798 if (kthread_should_stop()) 799 fe->exit = DVB_FE_DEVICE_REMOVED; 800 else 801 fe->exit = DVB_FE_NO_EXIT; 802 mb(); 803 804 if (semheld) 805 up(&fepriv->sem); 806 dvb_frontend_wakeup(fe); 807 return 0; 808 } 809 810 static void dvb_frontend_stop(struct dvb_frontend *fe) 811 { 812 struct dvb_frontend_private *fepriv = fe->frontend_priv; 813 814 dev_dbg(fe->dvb->device, "%s:\n", __func__); 815 816 if (fe->exit != DVB_FE_DEVICE_REMOVED) 817 fe->exit = DVB_FE_NORMAL_EXIT; 818 mb(); 819 820 if (!fepriv->thread) 821 return; 822 823 kthread_stop(fepriv->thread); 824 825 sema_init(&fepriv->sem, 1); 826 fepriv->state = FESTATE_IDLE; 827 828 /* paranoia check in case a signal arrived */ 829 if (fepriv->thread) 830 dev_warn(fe->dvb->device, 831 "dvb_frontend_stop: warning: thread %p won't exit\n", 832 fepriv->thread); 833 } 834 835 /* 836 * Sleep for the amount of time given by add_usec parameter 837 * 838 * This needs to be as precise as possible, as it affects the detection of 839 * the dish tone command at the satellite subsystem. The precision is improved 840 * by using a scheduled msleep followed by udelay for the remainder. 841 */ 842 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec) 843 { 844 s32 delta; 845 846 *waketime = ktime_add_us(*waketime, add_usec); 847 delta = ktime_us_delta(ktime_get_boottime(), *waketime); 848 if (delta > 2500) { 849 msleep((delta - 1500) / 1000); 850 delta = ktime_us_delta(ktime_get_boottime(), *waketime); 851 } 852 if (delta > 0) 853 udelay(delta); 854 } 855 EXPORT_SYMBOL(dvb_frontend_sleep_until); 856 857 static int dvb_frontend_start(struct dvb_frontend *fe) 858 { 859 int ret; 860 struct dvb_frontend_private *fepriv = fe->frontend_priv; 861 struct task_struct *fe_thread; 862 863 dev_dbg(fe->dvb->device, "%s:\n", __func__); 864 865 if (fepriv->thread) { 866 if (fe->exit == DVB_FE_NO_EXIT) 867 return 0; 868 else 869 dvb_frontend_stop(fe); 870 } 871 872 if (signal_pending(current)) 873 return -EINTR; 874 if (down_interruptible(&fepriv->sem)) 875 return -EINTR; 876 877 fepriv->state = FESTATE_IDLE; 878 fe->exit = DVB_FE_NO_EXIT; 879 fepriv->thread = NULL; 880 mb(); 881 882 fe_thread = kthread_run(dvb_frontend_thread, fe, 883 "kdvb-ad-%i-fe-%i", fe->dvb->num, fe->id); 884 if (IS_ERR(fe_thread)) { 885 ret = PTR_ERR(fe_thread); 886 dev_warn(fe->dvb->device, 887 "dvb_frontend_start: failed to start kthread (%d)\n", 888 ret); 889 up(&fepriv->sem); 890 return ret; 891 } 892 fepriv->thread = fe_thread; 893 return 0; 894 } 895 896 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe, 897 u32 *freq_min, u32 *freq_max, 898 u32 *tolerance) 899 { 900 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 901 u32 tuner_min = fe->ops.tuner_ops.info.frequency_min_hz; 902 u32 tuner_max = fe->ops.tuner_ops.info.frequency_max_hz; 903 u32 frontend_min = fe->ops.info.frequency_min_hz; 904 u32 frontend_max = fe->ops.info.frequency_max_hz; 905 906 *freq_min = max(frontend_min, tuner_min); 907 908 if (frontend_max == 0) 909 *freq_max = tuner_max; 910 else if (tuner_max == 0) 911 *freq_max = frontend_max; 912 else 913 *freq_max = min(frontend_max, tuner_max); 914 915 if (*freq_min == 0 || *freq_max == 0) 916 dev_warn(fe->dvb->device, 917 "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n", 918 fe->dvb->num, fe->id); 919 920 dprintk("frequency interval: tuner: %u...%u, frontend: %u...%u", 921 tuner_min, tuner_max, frontend_min, frontend_max); 922 923 /* If the standard is for satellite, convert frequencies to kHz */ 924 switch (c->delivery_system) { 925 case SYS_DVBS: 926 case SYS_DVBS2: 927 case SYS_TURBO: 928 case SYS_ISDBS: 929 *freq_min /= kHz; 930 *freq_max /= kHz; 931 if (tolerance) 932 *tolerance = fe->ops.info.frequency_tolerance_hz / kHz; 933 934 break; 935 default: 936 if (tolerance) 937 *tolerance = fe->ops.info.frequency_tolerance_hz; 938 break; 939 } 940 } 941 942 static u32 dvb_frontend_get_stepsize(struct dvb_frontend *fe) 943 { 944 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 945 u32 fe_step = fe->ops.info.frequency_stepsize_hz; 946 u32 tuner_step = fe->ops.tuner_ops.info.frequency_step_hz; 947 u32 step = max(fe_step, tuner_step); 948 949 switch (c->delivery_system) { 950 case SYS_DVBS: 951 case SYS_DVBS2: 952 case SYS_TURBO: 953 case SYS_ISDBS: 954 step /= kHz; 955 break; 956 default: 957 break; 958 } 959 960 return step; 961 } 962 963 static int dvb_frontend_check_parameters(struct dvb_frontend *fe) 964 { 965 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 966 u32 freq_min; 967 u32 freq_max; 968 969 /* range check: frequency */ 970 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max, NULL); 971 if ((freq_min && c->frequency < freq_min) || 972 (freq_max && c->frequency > freq_max)) { 973 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n", 974 fe->dvb->num, fe->id, c->frequency, 975 freq_min, freq_max); 976 return -EINVAL; 977 } 978 979 /* range check: symbol rate */ 980 switch (c->delivery_system) { 981 case SYS_DVBS: 982 case SYS_DVBS2: 983 case SYS_TURBO: 984 case SYS_DVBC_ANNEX_A: 985 case SYS_DVBC_ANNEX_C: 986 if ((fe->ops.info.symbol_rate_min && 987 c->symbol_rate < fe->ops.info.symbol_rate_min) || 988 (fe->ops.info.symbol_rate_max && 989 c->symbol_rate > fe->ops.info.symbol_rate_max)) { 990 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", 991 fe->dvb->num, fe->id, c->symbol_rate, 992 fe->ops.info.symbol_rate_min, 993 fe->ops.info.symbol_rate_max); 994 return -EINVAL; 995 } 996 default: 997 break; 998 } 999 1000 return 0; 1001 } 1002 1003 static int dvb_frontend_clear_cache(struct dvb_frontend *fe) 1004 { 1005 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1006 int i; 1007 u32 delsys; 1008 1009 delsys = c->delivery_system; 1010 memset(c, 0, offsetof(struct dtv_frontend_properties, strength)); 1011 c->delivery_system = delsys; 1012 1013 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n", 1014 __func__, c->delivery_system); 1015 1016 c->transmission_mode = TRANSMISSION_MODE_AUTO; 1017 c->bandwidth_hz = 0; /* AUTO */ 1018 c->guard_interval = GUARD_INTERVAL_AUTO; 1019 c->hierarchy = HIERARCHY_AUTO; 1020 c->symbol_rate = 0; 1021 c->code_rate_HP = FEC_AUTO; 1022 c->code_rate_LP = FEC_AUTO; 1023 c->fec_inner = FEC_AUTO; 1024 c->rolloff = ROLLOFF_AUTO; 1025 c->voltage = SEC_VOLTAGE_OFF; 1026 c->sectone = SEC_TONE_OFF; 1027 c->pilot = PILOT_AUTO; 1028 1029 c->isdbt_partial_reception = 0; 1030 c->isdbt_sb_mode = 0; 1031 c->isdbt_sb_subchannel = 0; 1032 c->isdbt_sb_segment_idx = 0; 1033 c->isdbt_sb_segment_count = 0; 1034 c->isdbt_layer_enabled = 7; /* All layers (A,B,C) */ 1035 for (i = 0; i < 3; i++) { 1036 c->layer[i].fec = FEC_AUTO; 1037 c->layer[i].modulation = QAM_AUTO; 1038 c->layer[i].interleaving = 0; 1039 c->layer[i].segment_count = 0; 1040 } 1041 1042 c->stream_id = NO_STREAM_ID_FILTER; 1043 c->scrambling_sequence_index = 0;/* default sequence */ 1044 1045 switch (c->delivery_system) { 1046 case SYS_DVBS: 1047 case SYS_DVBS2: 1048 case SYS_TURBO: 1049 c->modulation = QPSK; /* implied for DVB-S in legacy API */ 1050 c->rolloff = ROLLOFF_35;/* implied for DVB-S */ 1051 break; 1052 case SYS_ATSC: 1053 c->modulation = VSB_8; 1054 break; 1055 case SYS_ISDBS: 1056 c->symbol_rate = 28860000; 1057 c->rolloff = ROLLOFF_35; 1058 c->bandwidth_hz = c->symbol_rate / 100 * 135; 1059 break; 1060 default: 1061 c->modulation = QAM_AUTO; 1062 break; 1063 } 1064 1065 c->lna = LNA_AUTO; 1066 1067 return 0; 1068 } 1069 1070 #define _DTV_CMD(n, s, b) \ 1071 [n] = { \ 1072 .name = #n, \ 1073 .cmd = n, \ 1074 .set = s,\ 1075 .buffer = b \ 1076 } 1077 1078 struct dtv_cmds_h { 1079 char *name; /* A display name for debugging purposes */ 1080 1081 __u32 cmd; /* A unique ID */ 1082 1083 /* Flags */ 1084 __u32 set:1; /* Either a set or get property */ 1085 __u32 buffer:1; /* Does this property use the buffer? */ 1086 __u32 reserved:30; /* Align */ 1087 }; 1088 1089 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = { 1090 _DTV_CMD(DTV_TUNE, 1, 0), 1091 _DTV_CMD(DTV_CLEAR, 1, 0), 1092 1093 /* Set */ 1094 _DTV_CMD(DTV_FREQUENCY, 1, 0), 1095 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), 1096 _DTV_CMD(DTV_MODULATION, 1, 0), 1097 _DTV_CMD(DTV_INVERSION, 1, 0), 1098 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), 1099 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), 1100 _DTV_CMD(DTV_INNER_FEC, 1, 0), 1101 _DTV_CMD(DTV_VOLTAGE, 1, 0), 1102 _DTV_CMD(DTV_TONE, 1, 0), 1103 _DTV_CMD(DTV_PILOT, 1, 0), 1104 _DTV_CMD(DTV_ROLLOFF, 1, 0), 1105 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), 1106 _DTV_CMD(DTV_HIERARCHY, 1, 0), 1107 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), 1108 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), 1109 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), 1110 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), 1111 _DTV_CMD(DTV_INTERLEAVING, 1, 0), 1112 1113 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), 1114 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), 1115 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), 1116 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), 1117 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), 1118 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), 1119 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), 1120 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), 1121 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), 1122 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), 1123 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), 1124 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), 1125 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), 1126 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), 1127 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), 1128 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), 1129 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), 1130 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), 1131 1132 _DTV_CMD(DTV_STREAM_ID, 1, 0), 1133 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0), 1134 _DTV_CMD(DTV_SCRAMBLING_SEQUENCE_INDEX, 1, 0), 1135 _DTV_CMD(DTV_LNA, 1, 0), 1136 1137 /* Get */ 1138 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), 1139 _DTV_CMD(DTV_API_VERSION, 0, 0), 1140 1141 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0), 1142 1143 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0), 1144 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0), 1145 1146 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0), 1147 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0), 1148 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0), 1149 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0), 1150 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0), 1151 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0), 1152 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0), 1153 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0), 1154 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0), 1155 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0), 1156 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0), 1157 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0), 1158 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0), 1159 1160 /* Statistics API */ 1161 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0), 1162 _DTV_CMD(DTV_STAT_CNR, 0, 0), 1163 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0), 1164 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0), 1165 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0), 1166 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0), 1167 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0), 1168 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0), 1169 }; 1170 1171 /* Synchronise the legacy tuning parameters into the cache, so that demodulator 1172 * drivers can use a single set_frontend tuning function, regardless of whether 1173 * it's being used for the legacy or new API, reducing code and complexity. 1174 */ 1175 static int dtv_property_cache_sync(struct dvb_frontend *fe, 1176 struct dtv_frontend_properties *c, 1177 const struct dvb_frontend_parameters *p) 1178 { 1179 c->frequency = p->frequency; 1180 c->inversion = p->inversion; 1181 1182 switch (dvbv3_type(c->delivery_system)) { 1183 case DVBV3_QPSK: 1184 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1185 c->symbol_rate = p->u.qpsk.symbol_rate; 1186 c->fec_inner = p->u.qpsk.fec_inner; 1187 break; 1188 case DVBV3_QAM: 1189 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1190 c->symbol_rate = p->u.qam.symbol_rate; 1191 c->fec_inner = p->u.qam.fec_inner; 1192 c->modulation = p->u.qam.modulation; 1193 break; 1194 case DVBV3_OFDM: 1195 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1196 1197 switch (p->u.ofdm.bandwidth) { 1198 case BANDWIDTH_10_MHZ: 1199 c->bandwidth_hz = 10000000; 1200 break; 1201 case BANDWIDTH_8_MHZ: 1202 c->bandwidth_hz = 8000000; 1203 break; 1204 case BANDWIDTH_7_MHZ: 1205 c->bandwidth_hz = 7000000; 1206 break; 1207 case BANDWIDTH_6_MHZ: 1208 c->bandwidth_hz = 6000000; 1209 break; 1210 case BANDWIDTH_5_MHZ: 1211 c->bandwidth_hz = 5000000; 1212 break; 1213 case BANDWIDTH_1_712_MHZ: 1214 c->bandwidth_hz = 1712000; 1215 break; 1216 case BANDWIDTH_AUTO: 1217 c->bandwidth_hz = 0; 1218 } 1219 1220 c->code_rate_HP = p->u.ofdm.code_rate_HP; 1221 c->code_rate_LP = p->u.ofdm.code_rate_LP; 1222 c->modulation = p->u.ofdm.constellation; 1223 c->transmission_mode = p->u.ofdm.transmission_mode; 1224 c->guard_interval = p->u.ofdm.guard_interval; 1225 c->hierarchy = p->u.ofdm.hierarchy_information; 1226 break; 1227 case DVBV3_ATSC: 1228 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__); 1229 c->modulation = p->u.vsb.modulation; 1230 if (c->delivery_system == SYS_ATSCMH) 1231 break; 1232 if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) 1233 c->delivery_system = SYS_ATSC; 1234 else 1235 c->delivery_system = SYS_DVBC_ANNEX_B; 1236 break; 1237 case DVBV3_UNKNOWN: 1238 dev_err(fe->dvb->device, 1239 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1240 __func__, c->delivery_system); 1241 return -EINVAL; 1242 } 1243 1244 return 0; 1245 } 1246 1247 /* Ensure the cached values are set correctly in the frontend 1248 * legacy tuning structures, for the advanced tuning API. 1249 */ 1250 static int 1251 dtv_property_legacy_params_sync(struct dvb_frontend *fe, 1252 const struct dtv_frontend_properties *c, 1253 struct dvb_frontend_parameters *p) 1254 { 1255 p->frequency = c->frequency; 1256 p->inversion = c->inversion; 1257 1258 switch (dvbv3_type(c->delivery_system)) { 1259 case DVBV3_UNKNOWN: 1260 dev_err(fe->dvb->device, 1261 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1262 __func__, c->delivery_system); 1263 return -EINVAL; 1264 case DVBV3_QPSK: 1265 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1266 p->u.qpsk.symbol_rate = c->symbol_rate; 1267 p->u.qpsk.fec_inner = c->fec_inner; 1268 break; 1269 case DVBV3_QAM: 1270 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1271 p->u.qam.symbol_rate = c->symbol_rate; 1272 p->u.qam.fec_inner = c->fec_inner; 1273 p->u.qam.modulation = c->modulation; 1274 break; 1275 case DVBV3_OFDM: 1276 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1277 switch (c->bandwidth_hz) { 1278 case 10000000: 1279 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ; 1280 break; 1281 case 8000000: 1282 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1283 break; 1284 case 7000000: 1285 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1286 break; 1287 case 6000000: 1288 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1289 break; 1290 case 5000000: 1291 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ; 1292 break; 1293 case 1712000: 1294 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ; 1295 break; 1296 case 0: 1297 default: 1298 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1299 } 1300 p->u.ofdm.code_rate_HP = c->code_rate_HP; 1301 p->u.ofdm.code_rate_LP = c->code_rate_LP; 1302 p->u.ofdm.constellation = c->modulation; 1303 p->u.ofdm.transmission_mode = c->transmission_mode; 1304 p->u.ofdm.guard_interval = c->guard_interval; 1305 p->u.ofdm.hierarchy_information = c->hierarchy; 1306 break; 1307 case DVBV3_ATSC: 1308 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__); 1309 p->u.vsb.modulation = c->modulation; 1310 break; 1311 } 1312 return 0; 1313 } 1314 1315 /** 1316 * dtv_get_frontend - calls a callback for retrieving DTV parameters 1317 * @fe: struct dvb_frontend pointer 1318 * @c: struct dtv_frontend_properties pointer (DVBv5 cache) 1319 * @p_out: struct dvb_frontend_parameters pointer (DVBv3 FE struct) 1320 * 1321 * This routine calls either the DVBv3 or DVBv5 get_frontend call. 1322 * If c is not null, it will update the DVBv5 cache struct pointed by it. 1323 * If p_out is not null, it will update the DVBv3 params pointed by it. 1324 */ 1325 static int dtv_get_frontend(struct dvb_frontend *fe, 1326 struct dtv_frontend_properties *c, 1327 struct dvb_frontend_parameters *p_out) 1328 { 1329 int r; 1330 1331 if (fe->ops.get_frontend) { 1332 r = fe->ops.get_frontend(fe, c); 1333 if (unlikely(r < 0)) 1334 return r; 1335 if (p_out) 1336 dtv_property_legacy_params_sync(fe, c, p_out); 1337 return 0; 1338 } 1339 1340 /* As everything is in cache, get_frontend fops are always supported */ 1341 return 0; 1342 } 1343 1344 static int dvb_frontend_handle_ioctl(struct file *file, 1345 unsigned int cmd, void *parg); 1346 1347 static int dtv_property_process_get(struct dvb_frontend *fe, 1348 const struct dtv_frontend_properties *c, 1349 struct dtv_property *tvp, 1350 struct file *file) 1351 { 1352 int ncaps; 1353 1354 switch (tvp->cmd) { 1355 case DTV_ENUM_DELSYS: 1356 ncaps = 0; 1357 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1358 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps]; 1359 ncaps++; 1360 } 1361 tvp->u.buffer.len = ncaps; 1362 break; 1363 case DTV_FREQUENCY: 1364 tvp->u.data = c->frequency; 1365 break; 1366 case DTV_MODULATION: 1367 tvp->u.data = c->modulation; 1368 break; 1369 case DTV_BANDWIDTH_HZ: 1370 tvp->u.data = c->bandwidth_hz; 1371 break; 1372 case DTV_INVERSION: 1373 tvp->u.data = c->inversion; 1374 break; 1375 case DTV_SYMBOL_RATE: 1376 tvp->u.data = c->symbol_rate; 1377 break; 1378 case DTV_INNER_FEC: 1379 tvp->u.data = c->fec_inner; 1380 break; 1381 case DTV_PILOT: 1382 tvp->u.data = c->pilot; 1383 break; 1384 case DTV_ROLLOFF: 1385 tvp->u.data = c->rolloff; 1386 break; 1387 case DTV_DELIVERY_SYSTEM: 1388 tvp->u.data = c->delivery_system; 1389 break; 1390 case DTV_VOLTAGE: 1391 tvp->u.data = c->voltage; 1392 break; 1393 case DTV_TONE: 1394 tvp->u.data = c->sectone; 1395 break; 1396 case DTV_API_VERSION: 1397 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; 1398 break; 1399 case DTV_CODE_RATE_HP: 1400 tvp->u.data = c->code_rate_HP; 1401 break; 1402 case DTV_CODE_RATE_LP: 1403 tvp->u.data = c->code_rate_LP; 1404 break; 1405 case DTV_GUARD_INTERVAL: 1406 tvp->u.data = c->guard_interval; 1407 break; 1408 case DTV_TRANSMISSION_MODE: 1409 tvp->u.data = c->transmission_mode; 1410 break; 1411 case DTV_HIERARCHY: 1412 tvp->u.data = c->hierarchy; 1413 break; 1414 case DTV_INTERLEAVING: 1415 tvp->u.data = c->interleaving; 1416 break; 1417 1418 /* ISDB-T Support here */ 1419 case DTV_ISDBT_PARTIAL_RECEPTION: 1420 tvp->u.data = c->isdbt_partial_reception; 1421 break; 1422 case DTV_ISDBT_SOUND_BROADCASTING: 1423 tvp->u.data = c->isdbt_sb_mode; 1424 break; 1425 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1426 tvp->u.data = c->isdbt_sb_subchannel; 1427 break; 1428 case DTV_ISDBT_SB_SEGMENT_IDX: 1429 tvp->u.data = c->isdbt_sb_segment_idx; 1430 break; 1431 case DTV_ISDBT_SB_SEGMENT_COUNT: 1432 tvp->u.data = c->isdbt_sb_segment_count; 1433 break; 1434 case DTV_ISDBT_LAYER_ENABLED: 1435 tvp->u.data = c->isdbt_layer_enabled; 1436 break; 1437 case DTV_ISDBT_LAYERA_FEC: 1438 tvp->u.data = c->layer[0].fec; 1439 break; 1440 case DTV_ISDBT_LAYERA_MODULATION: 1441 tvp->u.data = c->layer[0].modulation; 1442 break; 1443 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1444 tvp->u.data = c->layer[0].segment_count; 1445 break; 1446 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1447 tvp->u.data = c->layer[0].interleaving; 1448 break; 1449 case DTV_ISDBT_LAYERB_FEC: 1450 tvp->u.data = c->layer[1].fec; 1451 break; 1452 case DTV_ISDBT_LAYERB_MODULATION: 1453 tvp->u.data = c->layer[1].modulation; 1454 break; 1455 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1456 tvp->u.data = c->layer[1].segment_count; 1457 break; 1458 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1459 tvp->u.data = c->layer[1].interleaving; 1460 break; 1461 case DTV_ISDBT_LAYERC_FEC: 1462 tvp->u.data = c->layer[2].fec; 1463 break; 1464 case DTV_ISDBT_LAYERC_MODULATION: 1465 tvp->u.data = c->layer[2].modulation; 1466 break; 1467 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1468 tvp->u.data = c->layer[2].segment_count; 1469 break; 1470 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1471 tvp->u.data = c->layer[2].interleaving; 1472 break; 1473 1474 /* Multistream support */ 1475 case DTV_STREAM_ID: 1476 case DTV_DVBT2_PLP_ID_LEGACY: 1477 tvp->u.data = c->stream_id; 1478 break; 1479 1480 /* Physical layer scrambling support */ 1481 case DTV_SCRAMBLING_SEQUENCE_INDEX: 1482 tvp->u.data = c->scrambling_sequence_index; 1483 break; 1484 1485 /* ATSC-MH */ 1486 case DTV_ATSCMH_FIC_VER: 1487 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver; 1488 break; 1489 case DTV_ATSCMH_PARADE_ID: 1490 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id; 1491 break; 1492 case DTV_ATSCMH_NOG: 1493 tvp->u.data = fe->dtv_property_cache.atscmh_nog; 1494 break; 1495 case DTV_ATSCMH_TNOG: 1496 tvp->u.data = fe->dtv_property_cache.atscmh_tnog; 1497 break; 1498 case DTV_ATSCMH_SGN: 1499 tvp->u.data = fe->dtv_property_cache.atscmh_sgn; 1500 break; 1501 case DTV_ATSCMH_PRC: 1502 tvp->u.data = fe->dtv_property_cache.atscmh_prc; 1503 break; 1504 case DTV_ATSCMH_RS_FRAME_MODE: 1505 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode; 1506 break; 1507 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1508 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble; 1509 break; 1510 case DTV_ATSCMH_RS_CODE_MODE_PRI: 1511 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri; 1512 break; 1513 case DTV_ATSCMH_RS_CODE_MODE_SEC: 1514 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec; 1515 break; 1516 case DTV_ATSCMH_SCCC_BLOCK_MODE: 1517 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode; 1518 break; 1519 case DTV_ATSCMH_SCCC_CODE_MODE_A: 1520 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a; 1521 break; 1522 case DTV_ATSCMH_SCCC_CODE_MODE_B: 1523 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b; 1524 break; 1525 case DTV_ATSCMH_SCCC_CODE_MODE_C: 1526 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c; 1527 break; 1528 case DTV_ATSCMH_SCCC_CODE_MODE_D: 1529 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d; 1530 break; 1531 1532 case DTV_LNA: 1533 tvp->u.data = c->lna; 1534 break; 1535 1536 /* Fill quality measures */ 1537 case DTV_STAT_SIGNAL_STRENGTH: 1538 tvp->u.st = c->strength; 1539 break; 1540 case DTV_STAT_CNR: 1541 tvp->u.st = c->cnr; 1542 break; 1543 case DTV_STAT_PRE_ERROR_BIT_COUNT: 1544 tvp->u.st = c->pre_bit_error; 1545 break; 1546 case DTV_STAT_PRE_TOTAL_BIT_COUNT: 1547 tvp->u.st = c->pre_bit_count; 1548 break; 1549 case DTV_STAT_POST_ERROR_BIT_COUNT: 1550 tvp->u.st = c->post_bit_error; 1551 break; 1552 case DTV_STAT_POST_TOTAL_BIT_COUNT: 1553 tvp->u.st = c->post_bit_count; 1554 break; 1555 case DTV_STAT_ERROR_BLOCK_COUNT: 1556 tvp->u.st = c->block_error; 1557 break; 1558 case DTV_STAT_TOTAL_BLOCK_COUNT: 1559 tvp->u.st = c->block_count; 1560 break; 1561 default: 1562 dev_dbg(fe->dvb->device, 1563 "%s: FE property %d doesn't exist\n", 1564 __func__, tvp->cmd); 1565 return -EINVAL; 1566 } 1567 1568 if (!dtv_cmds[tvp->cmd].buffer) 1569 dev_dbg(fe->dvb->device, 1570 "%s: GET cmd 0x%08x (%s) = 0x%08x\n", 1571 __func__, tvp->cmd, dtv_cmds[tvp->cmd].name, 1572 tvp->u.data); 1573 else 1574 dev_dbg(fe->dvb->device, 1575 "%s: GET cmd 0x%08x (%s) len %d: %*ph\n", 1576 __func__, 1577 tvp->cmd, dtv_cmds[tvp->cmd].name, 1578 tvp->u.buffer.len, 1579 tvp->u.buffer.len, tvp->u.buffer.data); 1580 1581 return 0; 1582 } 1583 1584 static int dtv_set_frontend(struct dvb_frontend *fe); 1585 1586 static bool is_dvbv3_delsys(u32 delsys) 1587 { 1588 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) || 1589 (delsys == SYS_DVBS) || (delsys == SYS_ATSC); 1590 } 1591 1592 /** 1593 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type 1594 * @fe: struct frontend; 1595 * @delsys: DVBv5 type that will be used for emulation 1596 * 1597 * Provides emulation for delivery systems that are compatible with the old 1598 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows 1599 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontend 1600 * parameters are compatible with DVB-S spec. 1601 */ 1602 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys) 1603 { 1604 int i; 1605 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1606 1607 c->delivery_system = delsys; 1608 1609 /* 1610 * If the call is for ISDB-T, put it into full-seg, auto mode, TV 1611 */ 1612 if (c->delivery_system == SYS_ISDBT) { 1613 dev_dbg(fe->dvb->device, 1614 "%s: Using defaults for SYS_ISDBT\n", 1615 __func__); 1616 1617 if (!c->bandwidth_hz) 1618 c->bandwidth_hz = 6000000; 1619 1620 c->isdbt_partial_reception = 0; 1621 c->isdbt_sb_mode = 0; 1622 c->isdbt_sb_subchannel = 0; 1623 c->isdbt_sb_segment_idx = 0; 1624 c->isdbt_sb_segment_count = 0; 1625 c->isdbt_layer_enabled = 7; 1626 for (i = 0; i < 3; i++) { 1627 c->layer[i].fec = FEC_AUTO; 1628 c->layer[i].modulation = QAM_AUTO; 1629 c->layer[i].interleaving = 0; 1630 c->layer[i].segment_count = 0; 1631 } 1632 } 1633 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n", 1634 __func__, c->delivery_system); 1635 1636 return 0; 1637 } 1638 1639 /** 1640 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call 1641 * @fe: frontend struct 1642 * @desired_system: delivery system requested by the user 1643 * 1644 * A DVBv5 call know what's the desired system it wants. So, set it. 1645 * 1646 * There are, however, a few known issues with early DVBv5 applications that 1647 * are also handled by this logic: 1648 * 1649 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system. 1650 * This is an API violation, but, as we don't want to break userspace, 1651 * convert it to the first supported delivery system. 1652 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for 1653 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of 1654 * ISDB-T provided backward compat with DVB-T. 1655 */ 1656 static int dvbv5_set_delivery_system(struct dvb_frontend *fe, 1657 u32 desired_system) 1658 { 1659 int ncaps; 1660 u32 delsys = SYS_UNDEFINED; 1661 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1662 enum dvbv3_emulation_type type; 1663 1664 /* 1665 * It was reported that some old DVBv5 applications were 1666 * filling delivery_system with SYS_UNDEFINED. If this happens, 1667 * assume that the application wants to use the first supported 1668 * delivery system. 1669 */ 1670 if (desired_system == SYS_UNDEFINED) 1671 desired_system = fe->ops.delsys[0]; 1672 1673 /* 1674 * This is a DVBv5 call. So, it likely knows the supported 1675 * delivery systems. So, check if the desired delivery system is 1676 * supported 1677 */ 1678 ncaps = 0; 1679 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1680 if (fe->ops.delsys[ncaps] == desired_system) { 1681 c->delivery_system = desired_system; 1682 dev_dbg(fe->dvb->device, 1683 "%s: Changing delivery system to %d\n", 1684 __func__, desired_system); 1685 return 0; 1686 } 1687 ncaps++; 1688 } 1689 1690 /* 1691 * The requested delivery system isn't supported. Maybe userspace 1692 * is requesting a DVBv3 compatible delivery system. 1693 * 1694 * The emulation only works if the desired system is one of the 1695 * delivery systems supported by DVBv3 API 1696 */ 1697 if (!is_dvbv3_delsys(desired_system)) { 1698 dev_dbg(fe->dvb->device, 1699 "%s: Delivery system %d not supported.\n", 1700 __func__, desired_system); 1701 return -EINVAL; 1702 } 1703 1704 type = dvbv3_type(desired_system); 1705 1706 /* 1707 * Get the last non-DVBv3 delivery system that has the same type 1708 * of the desired system 1709 */ 1710 ncaps = 0; 1711 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1712 if (dvbv3_type(fe->ops.delsys[ncaps]) == type) 1713 delsys = fe->ops.delsys[ncaps]; 1714 ncaps++; 1715 } 1716 1717 /* There's nothing compatible with the desired delivery system */ 1718 if (delsys == SYS_UNDEFINED) { 1719 dev_dbg(fe->dvb->device, 1720 "%s: Delivery system %d not supported on emulation mode.\n", 1721 __func__, desired_system); 1722 return -EINVAL; 1723 } 1724 1725 dev_dbg(fe->dvb->device, 1726 "%s: Using delivery system %d emulated as if it were %d\n", 1727 __func__, delsys, desired_system); 1728 1729 return emulate_delivery_system(fe, desired_system); 1730 } 1731 1732 /** 1733 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call 1734 * @fe: frontend struct 1735 * 1736 * A DVBv3 call doesn't know what's the desired system it wants. It also 1737 * doesn't allow to switch between different types. Due to that, userspace 1738 * should use DVBv5 instead. 1739 * However, in order to avoid breaking userspace API, limited backward 1740 * compatibility support is provided. 1741 * 1742 * There are some delivery systems that are incompatible with DVBv3 calls. 1743 * 1744 * This routine should work fine for frontends that support just one delivery 1745 * system. 1746 * 1747 * For frontends that support multiple frontends: 1748 * 1) It defaults to use the first supported delivery system. There's an 1749 * userspace application that allows changing it at runtime; 1750 * 1751 * 2) If the current delivery system is not compatible with DVBv3, it gets 1752 * the first one that it is compatible. 1753 * 1754 * NOTE: in order for this to work with applications like Kaffeine that 1755 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to 1756 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the 1757 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back 1758 * to DVB-S. 1759 */ 1760 static int dvbv3_set_delivery_system(struct dvb_frontend *fe) 1761 { 1762 int ncaps; 1763 u32 delsys = SYS_UNDEFINED; 1764 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1765 1766 /* If not set yet, defaults to the first supported delivery system */ 1767 if (c->delivery_system == SYS_UNDEFINED) 1768 c->delivery_system = fe->ops.delsys[0]; 1769 1770 /* 1771 * Trivial case: just use the current one, if it already a DVBv3 1772 * delivery system 1773 */ 1774 if (is_dvbv3_delsys(c->delivery_system)) { 1775 dev_dbg(fe->dvb->device, 1776 "%s: Using delivery system to %d\n", 1777 __func__, c->delivery_system); 1778 return 0; 1779 } 1780 1781 /* 1782 * Seek for the first delivery system that it is compatible with a 1783 * DVBv3 standard 1784 */ 1785 ncaps = 0; 1786 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1787 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) { 1788 delsys = fe->ops.delsys[ncaps]; 1789 break; 1790 } 1791 ncaps++; 1792 } 1793 if (delsys == SYS_UNDEFINED) { 1794 dev_dbg(fe->dvb->device, 1795 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n", 1796 __func__); 1797 return -EINVAL; 1798 } 1799 return emulate_delivery_system(fe, delsys); 1800 } 1801 1802 /** 1803 * dtv_property_process_set - Sets a single DTV property 1804 * @fe: Pointer to &struct dvb_frontend 1805 * @file: Pointer to &struct file 1806 * @cmd: Digital TV command 1807 * @data: An unsigned 32-bits number 1808 * 1809 * This routine assigns the property 1810 * value to the corresponding member of 1811 * &struct dtv_frontend_properties 1812 * 1813 * Returns: 1814 * Zero on success, negative errno on failure. 1815 */ 1816 static int dtv_property_process_set(struct dvb_frontend *fe, 1817 struct file *file, 1818 u32 cmd, u32 data) 1819 { 1820 int r = 0; 1821 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1822 1823 /** Dump DTV command name and value*/ 1824 if (!cmd || cmd > DTV_MAX_COMMAND) 1825 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n", 1826 __func__, cmd); 1827 else 1828 dev_dbg(fe->dvb->device, 1829 "%s: SET cmd 0x%08x (%s) to 0x%08x\n", 1830 __func__, cmd, dtv_cmds[cmd].name, data); 1831 switch (cmd) { 1832 case DTV_CLEAR: 1833 /* 1834 * Reset a cache of data specific to the frontend here. This does 1835 * not effect hardware. 1836 */ 1837 dvb_frontend_clear_cache(fe); 1838 break; 1839 case DTV_TUNE: 1840 /* 1841 * Use the cached Digital TV properties to tune the 1842 * frontend 1843 */ 1844 dev_dbg(fe->dvb->device, 1845 "%s: Setting the frontend from property cache\n", 1846 __func__); 1847 1848 r = dtv_set_frontend(fe); 1849 break; 1850 case DTV_FREQUENCY: 1851 c->frequency = data; 1852 break; 1853 case DTV_MODULATION: 1854 c->modulation = data; 1855 break; 1856 case DTV_BANDWIDTH_HZ: 1857 c->bandwidth_hz = data; 1858 break; 1859 case DTV_INVERSION: 1860 c->inversion = data; 1861 break; 1862 case DTV_SYMBOL_RATE: 1863 c->symbol_rate = data; 1864 break; 1865 case DTV_INNER_FEC: 1866 c->fec_inner = data; 1867 break; 1868 case DTV_PILOT: 1869 c->pilot = data; 1870 break; 1871 case DTV_ROLLOFF: 1872 c->rolloff = data; 1873 break; 1874 case DTV_DELIVERY_SYSTEM: 1875 r = dvbv5_set_delivery_system(fe, data); 1876 break; 1877 case DTV_VOLTAGE: 1878 c->voltage = data; 1879 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE, 1880 (void *)c->voltage); 1881 break; 1882 case DTV_TONE: 1883 c->sectone = data; 1884 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE, 1885 (void *)c->sectone); 1886 break; 1887 case DTV_CODE_RATE_HP: 1888 c->code_rate_HP = data; 1889 break; 1890 case DTV_CODE_RATE_LP: 1891 c->code_rate_LP = data; 1892 break; 1893 case DTV_GUARD_INTERVAL: 1894 c->guard_interval = data; 1895 break; 1896 case DTV_TRANSMISSION_MODE: 1897 c->transmission_mode = data; 1898 break; 1899 case DTV_HIERARCHY: 1900 c->hierarchy = data; 1901 break; 1902 case DTV_INTERLEAVING: 1903 c->interleaving = data; 1904 break; 1905 1906 /* ISDB-T Support here */ 1907 case DTV_ISDBT_PARTIAL_RECEPTION: 1908 c->isdbt_partial_reception = data; 1909 break; 1910 case DTV_ISDBT_SOUND_BROADCASTING: 1911 c->isdbt_sb_mode = data; 1912 break; 1913 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1914 c->isdbt_sb_subchannel = data; 1915 break; 1916 case DTV_ISDBT_SB_SEGMENT_IDX: 1917 c->isdbt_sb_segment_idx = data; 1918 break; 1919 case DTV_ISDBT_SB_SEGMENT_COUNT: 1920 c->isdbt_sb_segment_count = data; 1921 break; 1922 case DTV_ISDBT_LAYER_ENABLED: 1923 c->isdbt_layer_enabled = data; 1924 break; 1925 case DTV_ISDBT_LAYERA_FEC: 1926 c->layer[0].fec = data; 1927 break; 1928 case DTV_ISDBT_LAYERA_MODULATION: 1929 c->layer[0].modulation = data; 1930 break; 1931 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1932 c->layer[0].segment_count = data; 1933 break; 1934 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1935 c->layer[0].interleaving = data; 1936 break; 1937 case DTV_ISDBT_LAYERB_FEC: 1938 c->layer[1].fec = data; 1939 break; 1940 case DTV_ISDBT_LAYERB_MODULATION: 1941 c->layer[1].modulation = data; 1942 break; 1943 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1944 c->layer[1].segment_count = data; 1945 break; 1946 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1947 c->layer[1].interleaving = data; 1948 break; 1949 case DTV_ISDBT_LAYERC_FEC: 1950 c->layer[2].fec = data; 1951 break; 1952 case DTV_ISDBT_LAYERC_MODULATION: 1953 c->layer[2].modulation = data; 1954 break; 1955 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1956 c->layer[2].segment_count = data; 1957 break; 1958 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1959 c->layer[2].interleaving = data; 1960 break; 1961 1962 /* Multistream support */ 1963 case DTV_STREAM_ID: 1964 case DTV_DVBT2_PLP_ID_LEGACY: 1965 c->stream_id = data; 1966 break; 1967 1968 /* Physical layer scrambling support */ 1969 case DTV_SCRAMBLING_SEQUENCE_INDEX: 1970 c->scrambling_sequence_index = data; 1971 break; 1972 1973 /* ATSC-MH */ 1974 case DTV_ATSCMH_PARADE_ID: 1975 fe->dtv_property_cache.atscmh_parade_id = data; 1976 break; 1977 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1978 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data; 1979 break; 1980 1981 case DTV_LNA: 1982 c->lna = data; 1983 if (fe->ops.set_lna) 1984 r = fe->ops.set_lna(fe); 1985 if (r < 0) 1986 c->lna = LNA_AUTO; 1987 break; 1988 1989 default: 1990 return -EINVAL; 1991 } 1992 1993 return r; 1994 } 1995 1996 static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd, 1997 void *parg) 1998 { 1999 struct dvb_device *dvbdev = file->private_data; 2000 struct dvb_frontend *fe = dvbdev->priv; 2001 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2002 int err; 2003 2004 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd)); 2005 if (down_interruptible(&fepriv->sem)) 2006 return -ERESTARTSYS; 2007 2008 if (fe->exit != DVB_FE_NO_EXIT) { 2009 up(&fepriv->sem); 2010 return -ENODEV; 2011 } 2012 2013 /* 2014 * If the frontend is opened in read-only mode, only the ioctls 2015 * that don't interfere with the tune logic should be accepted. 2016 * That allows an external application to monitor the DVB QoS and 2017 * statistics parameters. 2018 * 2019 * That matches all _IOR() ioctls, except for two special cases: 2020 * - FE_GET_EVENT is part of the tuning logic on a DVB application; 2021 * - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0 2022 * setup 2023 * So, those two ioctls should also return -EPERM, as otherwise 2024 * reading from them would interfere with a DVB tune application 2025 */ 2026 if ((file->f_flags & O_ACCMODE) == O_RDONLY 2027 && (_IOC_DIR(cmd) != _IOC_READ 2028 || cmd == FE_GET_EVENT 2029 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) { 2030 up(&fepriv->sem); 2031 return -EPERM; 2032 } 2033 2034 err = dvb_frontend_handle_ioctl(file, cmd, parg); 2035 2036 up(&fepriv->sem); 2037 return err; 2038 } 2039 2040 static long dvb_frontend_ioctl(struct file *file, unsigned int cmd, 2041 unsigned long arg) 2042 { 2043 struct dvb_device *dvbdev = file->private_data; 2044 2045 if (!dvbdev) 2046 return -ENODEV; 2047 2048 return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl); 2049 } 2050 2051 #ifdef CONFIG_COMPAT 2052 struct compat_dtv_property { 2053 __u32 cmd; 2054 __u32 reserved[3]; 2055 union { 2056 __u32 data; 2057 struct dtv_fe_stats st; 2058 struct { 2059 __u8 data[32]; 2060 __u32 len; 2061 __u32 reserved1[3]; 2062 compat_uptr_t reserved2; 2063 } buffer; 2064 } u; 2065 int result; 2066 } __attribute__ ((packed)); 2067 2068 struct compat_dtv_properties { 2069 __u32 num; 2070 compat_uptr_t props; 2071 }; 2072 2073 #define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties) 2074 #define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties) 2075 2076 static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd, 2077 unsigned long arg) 2078 { 2079 struct dvb_device *dvbdev = file->private_data; 2080 struct dvb_frontend *fe = dvbdev->priv; 2081 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2082 int i, err = 0; 2083 2084 if (cmd == COMPAT_FE_SET_PROPERTY) { 2085 struct compat_dtv_properties prop, *tvps = NULL; 2086 struct compat_dtv_property *tvp = NULL; 2087 2088 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop))) 2089 return -EFAULT; 2090 2091 tvps = ∝ 2092 2093 /* 2094 * Put an arbitrary limit on the number of messages that can 2095 * be sent at once 2096 */ 2097 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2098 return -EINVAL; 2099 2100 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp)); 2101 if (IS_ERR(tvp)) 2102 return PTR_ERR(tvp); 2103 2104 for (i = 0; i < tvps->num; i++) { 2105 err = dtv_property_process_set(fe, file, 2106 (tvp + i)->cmd, 2107 (tvp + i)->u.data); 2108 if (err < 0) { 2109 kfree(tvp); 2110 return err; 2111 } 2112 } 2113 kfree(tvp); 2114 } else if (cmd == COMPAT_FE_GET_PROPERTY) { 2115 struct compat_dtv_properties prop, *tvps = NULL; 2116 struct compat_dtv_property *tvp = NULL; 2117 struct dtv_frontend_properties getp = fe->dtv_property_cache; 2118 2119 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop))) 2120 return -EFAULT; 2121 2122 tvps = ∝ 2123 2124 /* 2125 * Put an arbitrary limit on the number of messages that can 2126 * be sent at once 2127 */ 2128 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2129 return -EINVAL; 2130 2131 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp)); 2132 if (IS_ERR(tvp)) 2133 return PTR_ERR(tvp); 2134 2135 /* 2136 * Let's use our own copy of property cache, in order to 2137 * avoid mangling with DTV zigzag logic, as drivers might 2138 * return crap, if they don't check if the data is available 2139 * before updating the properties cache. 2140 */ 2141 if (fepriv->state != FESTATE_IDLE) { 2142 err = dtv_get_frontend(fe, &getp, NULL); 2143 if (err < 0) { 2144 kfree(tvp); 2145 return err; 2146 } 2147 } 2148 for (i = 0; i < tvps->num; i++) { 2149 err = dtv_property_process_get( 2150 fe, &getp, (struct dtv_property *)(tvp + i), file); 2151 if (err < 0) { 2152 kfree(tvp); 2153 return err; 2154 } 2155 } 2156 2157 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp, 2158 tvps->num * sizeof(struct compat_dtv_property))) { 2159 kfree(tvp); 2160 return -EFAULT; 2161 } 2162 kfree(tvp); 2163 } 2164 2165 return err; 2166 } 2167 2168 static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd, 2169 unsigned long arg) 2170 { 2171 struct dvb_device *dvbdev = file->private_data; 2172 struct dvb_frontend *fe = dvbdev->priv; 2173 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2174 int err; 2175 2176 if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) { 2177 if (down_interruptible(&fepriv->sem)) 2178 return -ERESTARTSYS; 2179 2180 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg); 2181 2182 up(&fepriv->sem); 2183 return err; 2184 } 2185 2186 return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2187 } 2188 #endif 2189 2190 static int dtv_set_frontend(struct dvb_frontend *fe) 2191 { 2192 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2193 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2194 struct dvb_frontend_tune_settings fetunesettings; 2195 u32 rolloff = 0; 2196 2197 if (dvb_frontend_check_parameters(fe) < 0) 2198 return -EINVAL; 2199 2200 /* 2201 * Initialize output parameters to match the values given by 2202 * the user. FE_SET_FRONTEND triggers an initial frontend event 2203 * with status = 0, which copies output parameters to userspace. 2204 */ 2205 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out); 2206 2207 /* 2208 * Be sure that the bandwidth will be filled for all 2209 * non-satellite systems, as tuners need to know what 2210 * low pass/Nyquist half filter should be applied, in 2211 * order to avoid inter-channel noise. 2212 * 2213 * ISDB-T and DVB-T/T2 already sets bandwidth. 2214 * ATSC and DVB-C don't set, so, the core should fill it. 2215 * 2216 * On DVB-C Annex A and C, the bandwidth is a function of 2217 * the roll-off and symbol rate. Annex B defines different 2218 * roll-off factors depending on the modulation. Fortunately, 2219 * Annex B is only used with 6MHz, so there's no need to 2220 * calculate it. 2221 * 2222 * While not officially supported, a side effect of handling it at 2223 * the cache level is that a program could retrieve the bandwidth 2224 * via DTV_BANDWIDTH_HZ, which may be useful for test programs. 2225 */ 2226 switch (c->delivery_system) { 2227 case SYS_ATSC: 2228 case SYS_DVBC_ANNEX_B: 2229 c->bandwidth_hz = 6000000; 2230 break; 2231 case SYS_DVBC_ANNEX_A: 2232 rolloff = 115; 2233 break; 2234 case SYS_DVBC_ANNEX_C: 2235 rolloff = 113; 2236 break; 2237 case SYS_DVBS: 2238 case SYS_TURBO: 2239 case SYS_ISDBS: 2240 rolloff = 135; 2241 break; 2242 case SYS_DVBS2: 2243 switch (c->rolloff) { 2244 case ROLLOFF_20: 2245 rolloff = 120; 2246 break; 2247 case ROLLOFF_25: 2248 rolloff = 125; 2249 break; 2250 default: 2251 case ROLLOFF_35: 2252 rolloff = 135; 2253 } 2254 break; 2255 default: 2256 break; 2257 } 2258 if (rolloff) 2259 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100); 2260 2261 /* force auto frequency inversion if requested */ 2262 if (dvb_force_auto_inversion) 2263 c->inversion = INVERSION_AUTO; 2264 2265 /* 2266 * without hierarchical coding code_rate_LP is irrelevant, 2267 * so we tolerate the otherwise invalid FEC_NONE setting 2268 */ 2269 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE) 2270 c->code_rate_LP = FEC_AUTO; 2271 2272 /* get frontend-specific tuning settings */ 2273 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); 2274 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { 2275 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; 2276 fepriv->max_drift = fetunesettings.max_drift; 2277 fepriv->step_size = fetunesettings.step_size; 2278 } else { 2279 /* default values */ 2280 switch (c->delivery_system) { 2281 case SYS_DVBS: 2282 case SYS_DVBS2: 2283 case SYS_ISDBS: 2284 case SYS_TURBO: 2285 case SYS_DVBC_ANNEX_A: 2286 case SYS_DVBC_ANNEX_C: 2287 fepriv->min_delay = HZ / 20; 2288 fepriv->step_size = c->symbol_rate / 16000; 2289 fepriv->max_drift = c->symbol_rate / 2000; 2290 break; 2291 case SYS_DVBT: 2292 case SYS_DVBT2: 2293 case SYS_ISDBT: 2294 case SYS_DTMB: 2295 fepriv->min_delay = HZ / 20; 2296 fepriv->step_size = dvb_frontend_get_stepsize(fe) * 2; 2297 fepriv->max_drift = (dvb_frontend_get_stepsize(fe) * 2) + 1; 2298 break; 2299 default: 2300 /* 2301 * FIXME: This sounds wrong! if freqency_stepsize is 2302 * defined by the frontend, why not use it??? 2303 */ 2304 fepriv->min_delay = HZ / 20; 2305 fepriv->step_size = 0; /* no zigzag */ 2306 fepriv->max_drift = 0; 2307 break; 2308 } 2309 } 2310 if (dvb_override_tune_delay > 0) 2311 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; 2312 2313 fepriv->state = FESTATE_RETUNE; 2314 2315 /* Request the search algorithm to search */ 2316 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 2317 2318 dvb_frontend_clear_events(fe); 2319 dvb_frontend_add_event(fe, 0); 2320 dvb_frontend_wakeup(fe); 2321 fepriv->status = 0; 2322 2323 return 0; 2324 } 2325 2326 static int dvb_frontend_handle_ioctl(struct file *file, 2327 unsigned int cmd, void *parg) 2328 { 2329 struct dvb_device *dvbdev = file->private_data; 2330 struct dvb_frontend *fe = dvbdev->priv; 2331 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2332 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2333 int i, err = -ENOTSUPP; 2334 2335 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2336 2337 switch (cmd) { 2338 case FE_SET_PROPERTY: { 2339 struct dtv_properties *tvps = parg; 2340 struct dtv_property *tvp = NULL; 2341 2342 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", 2343 __func__, tvps->num); 2344 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", 2345 __func__, tvps->props); 2346 2347 /* 2348 * Put an arbitrary limit on the number of messages that can 2349 * be sent at once 2350 */ 2351 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2352 return -EINVAL; 2353 2354 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp)); 2355 if (IS_ERR(tvp)) 2356 return PTR_ERR(tvp); 2357 2358 for (i = 0; i < tvps->num; i++) { 2359 err = dtv_property_process_set(fe, file, 2360 (tvp + i)->cmd, 2361 (tvp + i)->u.data); 2362 if (err < 0) { 2363 kfree(tvp); 2364 return err; 2365 } 2366 } 2367 kfree(tvp); 2368 err = 0; 2369 break; 2370 } 2371 case FE_GET_PROPERTY: { 2372 struct dtv_properties *tvps = parg; 2373 struct dtv_property *tvp = NULL; 2374 struct dtv_frontend_properties getp = fe->dtv_property_cache; 2375 2376 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", 2377 __func__, tvps->num); 2378 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", 2379 __func__, tvps->props); 2380 2381 /* 2382 * Put an arbitrary limit on the number of messages that can 2383 * be sent at once 2384 */ 2385 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2386 return -EINVAL; 2387 2388 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp)); 2389 if (IS_ERR(tvp)) 2390 return PTR_ERR(tvp); 2391 2392 /* 2393 * Let's use our own copy of property cache, in order to 2394 * avoid mangling with DTV zigzag logic, as drivers might 2395 * return crap, if they don't check if the data is available 2396 * before updating the properties cache. 2397 */ 2398 if (fepriv->state != FESTATE_IDLE) { 2399 err = dtv_get_frontend(fe, &getp, NULL); 2400 if (err < 0) { 2401 kfree(tvp); 2402 return err; 2403 } 2404 } 2405 for (i = 0; i < tvps->num; i++) { 2406 err = dtv_property_process_get(fe, &getp, 2407 tvp + i, file); 2408 if (err < 0) { 2409 kfree(tvp); 2410 return err; 2411 } 2412 } 2413 2414 if (copy_to_user((void __user *)tvps->props, tvp, 2415 tvps->num * sizeof(struct dtv_property))) { 2416 kfree(tvp); 2417 return -EFAULT; 2418 } 2419 kfree(tvp); 2420 err = 0; 2421 break; 2422 } 2423 2424 case FE_GET_INFO: { 2425 struct dvb_frontend_info *info = parg; 2426 memset(info, 0, sizeof(*info)); 2427 2428 strscpy(info->name, fe->ops.info.name, sizeof(info->name)); 2429 info->symbol_rate_min = fe->ops.info.symbol_rate_min; 2430 info->symbol_rate_max = fe->ops.info.symbol_rate_max; 2431 info->symbol_rate_tolerance = fe->ops.info.symbol_rate_tolerance; 2432 info->caps = fe->ops.info.caps; 2433 info->frequency_stepsize = dvb_frontend_get_stepsize(fe); 2434 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, 2435 &info->frequency_max, 2436 &info->frequency_tolerance); 2437 2438 /* 2439 * Associate the 4 delivery systems supported by DVBv3 2440 * API with their DVBv5 counterpart. For the other standards, 2441 * use the closest type, assuming that it would hopefully 2442 * work with a DVBv3 application. 2443 * It should be noticed that, on multi-frontend devices with 2444 * different types (terrestrial and cable, for example), 2445 * a pure DVBv3 application won't be able to use all delivery 2446 * systems. Yet, changing the DVBv5 cache to the other delivery 2447 * system should be enough for making it work. 2448 */ 2449 switch (dvbv3_type(c->delivery_system)) { 2450 case DVBV3_QPSK: 2451 info->type = FE_QPSK; 2452 break; 2453 case DVBV3_ATSC: 2454 info->type = FE_ATSC; 2455 break; 2456 case DVBV3_QAM: 2457 info->type = FE_QAM; 2458 break; 2459 case DVBV3_OFDM: 2460 info->type = FE_OFDM; 2461 break; 2462 default: 2463 dev_err(fe->dvb->device, 2464 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 2465 __func__, c->delivery_system); 2466 info->type = FE_OFDM; 2467 } 2468 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n", 2469 __func__, c->delivery_system, info->type); 2470 2471 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */ 2472 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) 2473 info->caps |= FE_CAN_INVERSION_AUTO; 2474 err = 0; 2475 break; 2476 } 2477 2478 case FE_READ_STATUS: { 2479 enum fe_status *status = parg; 2480 2481 /* if retune was requested but hasn't occurred yet, prevent 2482 * that user get signal state from previous tuning */ 2483 if (fepriv->state == FESTATE_RETUNE || 2484 fepriv->state == FESTATE_ERROR) { 2485 err = 0; 2486 *status = 0; 2487 break; 2488 } 2489 2490 if (fe->ops.read_status) 2491 err = fe->ops.read_status(fe, status); 2492 break; 2493 } 2494 2495 case FE_DISEQC_RESET_OVERLOAD: 2496 if (fe->ops.diseqc_reset_overload) { 2497 err = fe->ops.diseqc_reset_overload(fe); 2498 fepriv->state = FESTATE_DISEQC; 2499 fepriv->status = 0; 2500 } 2501 break; 2502 2503 case FE_DISEQC_SEND_MASTER_CMD: 2504 if (fe->ops.diseqc_send_master_cmd) { 2505 struct dvb_diseqc_master_cmd *cmd = parg; 2506 2507 if (cmd->msg_len > sizeof(cmd->msg)) { 2508 err = -EINVAL; 2509 break; 2510 } 2511 err = fe->ops.diseqc_send_master_cmd(fe, cmd); 2512 fepriv->state = FESTATE_DISEQC; 2513 fepriv->status = 0; 2514 } 2515 break; 2516 2517 case FE_DISEQC_SEND_BURST: 2518 if (fe->ops.diseqc_send_burst) { 2519 err = fe->ops.diseqc_send_burst(fe, 2520 (enum fe_sec_mini_cmd)parg); 2521 fepriv->state = FESTATE_DISEQC; 2522 fepriv->status = 0; 2523 } 2524 break; 2525 2526 case FE_SET_TONE: 2527 if (fe->ops.set_tone) { 2528 err = fe->ops.set_tone(fe, 2529 (enum fe_sec_tone_mode)parg); 2530 fepriv->tone = (enum fe_sec_tone_mode)parg; 2531 fepriv->state = FESTATE_DISEQC; 2532 fepriv->status = 0; 2533 } 2534 break; 2535 2536 case FE_SET_VOLTAGE: 2537 if (fe->ops.set_voltage) { 2538 err = fe->ops.set_voltage(fe, 2539 (enum fe_sec_voltage)parg); 2540 fepriv->voltage = (enum fe_sec_voltage)parg; 2541 fepriv->state = FESTATE_DISEQC; 2542 fepriv->status = 0; 2543 } 2544 break; 2545 2546 case FE_DISEQC_RECV_SLAVE_REPLY: 2547 if (fe->ops.diseqc_recv_slave_reply) 2548 err = fe->ops.diseqc_recv_slave_reply(fe, parg); 2549 break; 2550 2551 case FE_ENABLE_HIGH_LNB_VOLTAGE: 2552 if (fe->ops.enable_high_lnb_voltage) 2553 err = fe->ops.enable_high_lnb_voltage(fe, (long)parg); 2554 break; 2555 2556 case FE_SET_FRONTEND_TUNE_MODE: 2557 fepriv->tune_mode_flags = (unsigned long)parg; 2558 err = 0; 2559 break; 2560 2561 /* DEPRECATED dish control ioctls */ 2562 2563 case FE_DISHNETWORK_SEND_LEGACY_CMD: 2564 if (fe->ops.dishnetwork_send_legacy_command) { 2565 err = fe->ops.dishnetwork_send_legacy_command(fe, 2566 (unsigned long)parg); 2567 fepriv->state = FESTATE_DISEQC; 2568 fepriv->status = 0; 2569 } else if (fe->ops.set_voltage) { 2570 /* 2571 * NOTE: This is a fallback condition. Some frontends 2572 * (stv0299 for instance) take longer than 8msec to 2573 * respond to a set_voltage command. Those switches 2574 * need custom routines to switch properly. For all 2575 * other frontends, the following should work ok. 2576 * Dish network legacy switches (as used by Dish500) 2577 * are controlled by sending 9-bit command words 2578 * spaced 8msec apart. 2579 * the actual command word is switch/port dependent 2580 * so it is up to the userspace application to send 2581 * the right command. 2582 * The command must always start with a '0' after 2583 * initialization, so parg is 8 bits and does not 2584 * include the initialization or start bit 2585 */ 2586 unsigned long swcmd = ((unsigned long)parg) << 1; 2587 ktime_t nexttime; 2588 ktime_t tv[10]; 2589 int i; 2590 u8 last = 1; 2591 2592 if (dvb_frontend_debug) 2593 dprintk("switch command: 0x%04lx\n", 2594 swcmd); 2595 nexttime = ktime_get_boottime(); 2596 if (dvb_frontend_debug) 2597 tv[0] = nexttime; 2598 /* before sending a command, initialize by sending 2599 * a 32ms 18V to the switch 2600 */ 2601 fe->ops.set_voltage(fe, SEC_VOLTAGE_18); 2602 dvb_frontend_sleep_until(&nexttime, 32000); 2603 2604 for (i = 0; i < 9; i++) { 2605 if (dvb_frontend_debug) 2606 tv[i + 1] = ktime_get_boottime(); 2607 if ((swcmd & 0x01) != last) { 2608 /* set voltage to (last ? 13V : 18V) */ 2609 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); 2610 last = (last) ? 0 : 1; 2611 } 2612 swcmd = swcmd >> 1; 2613 if (i != 8) 2614 dvb_frontend_sleep_until(&nexttime, 8000); 2615 } 2616 if (dvb_frontend_debug) { 2617 dprintk("(adapter %d): switch delay (should be 32k followed by all 8k)\n", 2618 fe->dvb->num); 2619 for (i = 1; i < 10; i++) 2620 pr_info("%d: %d\n", i, 2621 (int)ktime_us_delta(tv[i], tv[i - 1])); 2622 } 2623 err = 0; 2624 fepriv->state = FESTATE_DISEQC; 2625 fepriv->status = 0; 2626 } 2627 break; 2628 2629 /* DEPRECATED statistics ioctls */ 2630 2631 case FE_READ_BER: 2632 if (fe->ops.read_ber) { 2633 if (fepriv->thread) 2634 err = fe->ops.read_ber(fe, parg); 2635 else 2636 err = -EAGAIN; 2637 } 2638 break; 2639 2640 case FE_READ_SIGNAL_STRENGTH: 2641 if (fe->ops.read_signal_strength) { 2642 if (fepriv->thread) 2643 err = fe->ops.read_signal_strength(fe, parg); 2644 else 2645 err = -EAGAIN; 2646 } 2647 break; 2648 2649 case FE_READ_SNR: 2650 if (fe->ops.read_snr) { 2651 if (fepriv->thread) 2652 err = fe->ops.read_snr(fe, parg); 2653 else 2654 err = -EAGAIN; 2655 } 2656 break; 2657 2658 case FE_READ_UNCORRECTED_BLOCKS: 2659 if (fe->ops.read_ucblocks) { 2660 if (fepriv->thread) 2661 err = fe->ops.read_ucblocks(fe, parg); 2662 else 2663 err = -EAGAIN; 2664 } 2665 break; 2666 2667 /* DEPRECATED DVBv3 ioctls */ 2668 2669 case FE_SET_FRONTEND: 2670 err = dvbv3_set_delivery_system(fe); 2671 if (err) 2672 break; 2673 2674 err = dtv_property_cache_sync(fe, c, parg); 2675 if (err) 2676 break; 2677 err = dtv_set_frontend(fe); 2678 break; 2679 case FE_GET_EVENT: 2680 err = dvb_frontend_get_event(fe, parg, file->f_flags); 2681 break; 2682 2683 case FE_GET_FRONTEND: { 2684 struct dtv_frontend_properties getp = fe->dtv_property_cache; 2685 2686 /* 2687 * Let's use our own copy of property cache, in order to 2688 * avoid mangling with DTV zigzag logic, as drivers might 2689 * return crap, if they don't check if the data is available 2690 * before updating the properties cache. 2691 */ 2692 err = dtv_get_frontend(fe, &getp, parg); 2693 break; 2694 } 2695 2696 default: 2697 return -ENOTSUPP; 2698 } /* switch */ 2699 2700 return err; 2701 } 2702 2703 static __poll_t dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) 2704 { 2705 struct dvb_device *dvbdev = file->private_data; 2706 struct dvb_frontend *fe = dvbdev->priv; 2707 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2708 2709 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__); 2710 2711 poll_wait(file, &fepriv->events.wait_queue, wait); 2712 2713 if (fepriv->events.eventw != fepriv->events.eventr) 2714 return (EPOLLIN | EPOLLRDNORM | EPOLLPRI); 2715 2716 return 0; 2717 } 2718 2719 static int dvb_frontend_open(struct inode *inode, struct file *file) 2720 { 2721 struct dvb_device *dvbdev = file->private_data; 2722 struct dvb_frontend *fe = dvbdev->priv; 2723 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2724 struct dvb_adapter *adapter = fe->dvb; 2725 int ret; 2726 2727 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2728 if (fe->exit == DVB_FE_DEVICE_REMOVED) 2729 return -ENODEV; 2730 2731 if (adapter->mfe_shared) { 2732 mutex_lock(&adapter->mfe_lock); 2733 2734 if (!adapter->mfe_dvbdev) 2735 adapter->mfe_dvbdev = dvbdev; 2736 2737 else if (adapter->mfe_dvbdev != dvbdev) { 2738 struct dvb_device 2739 *mfedev = adapter->mfe_dvbdev; 2740 struct dvb_frontend 2741 *mfe = mfedev->priv; 2742 struct dvb_frontend_private 2743 *mfepriv = mfe->frontend_priv; 2744 int mferetry = (dvb_mfe_wait_time << 1); 2745 2746 mutex_unlock(&adapter->mfe_lock); 2747 while (mferetry-- && (mfedev->users != -1 || 2748 mfepriv->thread)) { 2749 if (msleep_interruptible(500)) { 2750 if (signal_pending(current)) 2751 return -EINTR; 2752 } 2753 } 2754 2755 mutex_lock(&adapter->mfe_lock); 2756 if (adapter->mfe_dvbdev != dvbdev) { 2757 mfedev = adapter->mfe_dvbdev; 2758 mfe = mfedev->priv; 2759 mfepriv = mfe->frontend_priv; 2760 if (mfedev->users != -1 || 2761 mfepriv->thread) { 2762 mutex_unlock(&adapter->mfe_lock); 2763 return -EBUSY; 2764 } 2765 adapter->mfe_dvbdev = dvbdev; 2766 } 2767 } 2768 } 2769 2770 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { 2771 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) 2772 goto err0; 2773 2774 /* If we took control of the bus, we need to force 2775 reinitialization. This is because many ts_bus_ctrl() 2776 functions strobe the RESET pin on the demod, and if the 2777 frontend thread already exists then the dvb_init() routine 2778 won't get called (which is what usually does initial 2779 register configuration). */ 2780 fepriv->reinitialise = 1; 2781 } 2782 2783 if ((ret = dvb_generic_open(inode, file)) < 0) 2784 goto err1; 2785 2786 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2787 /* normal tune mode when opened R/W */ 2788 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; 2789 fepriv->tone = -1; 2790 fepriv->voltage = -1; 2791 2792 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 2793 mutex_lock(&fe->dvb->mdev_lock); 2794 if (fe->dvb->mdev) { 2795 mutex_lock(&fe->dvb->mdev->graph_mutex); 2796 if (fe->dvb->mdev->enable_source) 2797 ret = fe->dvb->mdev->enable_source( 2798 dvbdev->entity, 2799 &fepriv->pipe); 2800 mutex_unlock(&fe->dvb->mdev->graph_mutex); 2801 if (ret) { 2802 mutex_unlock(&fe->dvb->mdev_lock); 2803 dev_err(fe->dvb->device, 2804 "Tuner is busy. Error %d\n", ret); 2805 goto err2; 2806 } 2807 } 2808 mutex_unlock(&fe->dvb->mdev_lock); 2809 #endif 2810 ret = dvb_frontend_start(fe); 2811 if (ret) 2812 goto err3; 2813 2814 /* empty event queue */ 2815 fepriv->events.eventr = fepriv->events.eventw = 0; 2816 } 2817 2818 dvb_frontend_get(fe); 2819 2820 if (adapter->mfe_shared) 2821 mutex_unlock(&adapter->mfe_lock); 2822 return ret; 2823 2824 err3: 2825 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 2826 mutex_lock(&fe->dvb->mdev_lock); 2827 if (fe->dvb->mdev) { 2828 mutex_lock(&fe->dvb->mdev->graph_mutex); 2829 if (fe->dvb->mdev->disable_source) 2830 fe->dvb->mdev->disable_source(dvbdev->entity); 2831 mutex_unlock(&fe->dvb->mdev->graph_mutex); 2832 } 2833 mutex_unlock(&fe->dvb->mdev_lock); 2834 err2: 2835 #endif 2836 dvb_generic_release(inode, file); 2837 err1: 2838 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) 2839 fe->ops.ts_bus_ctrl(fe, 0); 2840 err0: 2841 if (adapter->mfe_shared) 2842 mutex_unlock(&adapter->mfe_lock); 2843 return ret; 2844 } 2845 2846 static int dvb_frontend_release(struct inode *inode, struct file *file) 2847 { 2848 struct dvb_device *dvbdev = file->private_data; 2849 struct dvb_frontend *fe = dvbdev->priv; 2850 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2851 int ret; 2852 2853 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2854 2855 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2856 fepriv->release_jiffies = jiffies; 2857 mb(); 2858 } 2859 2860 ret = dvb_generic_release(inode, file); 2861 2862 if (dvbdev->users == -1) { 2863 wake_up(&fepriv->wait_queue); 2864 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 2865 mutex_lock(&fe->dvb->mdev_lock); 2866 if (fe->dvb->mdev) { 2867 mutex_lock(&fe->dvb->mdev->graph_mutex); 2868 if (fe->dvb->mdev->disable_source) 2869 fe->dvb->mdev->disable_source(dvbdev->entity); 2870 mutex_unlock(&fe->dvb->mdev->graph_mutex); 2871 } 2872 mutex_unlock(&fe->dvb->mdev_lock); 2873 #endif 2874 if (fe->exit != DVB_FE_NO_EXIT) 2875 wake_up(&dvbdev->wait_queue); 2876 if (fe->ops.ts_bus_ctrl) 2877 fe->ops.ts_bus_ctrl(fe, 0); 2878 } 2879 2880 dvb_frontend_put(fe); 2881 2882 return ret; 2883 } 2884 2885 static const struct file_operations dvb_frontend_fops = { 2886 .owner = THIS_MODULE, 2887 .unlocked_ioctl = dvb_frontend_ioctl, 2888 #ifdef CONFIG_COMPAT 2889 .compat_ioctl = dvb_frontend_compat_ioctl, 2890 #endif 2891 .poll = dvb_frontend_poll, 2892 .open = dvb_frontend_open, 2893 .release = dvb_frontend_release, 2894 .llseek = noop_llseek, 2895 }; 2896 2897 int dvb_frontend_suspend(struct dvb_frontend *fe) 2898 { 2899 int ret = 0; 2900 2901 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2902 fe->id); 2903 2904 if (fe->ops.tuner_ops.suspend) 2905 ret = fe->ops.tuner_ops.suspend(fe); 2906 else if (fe->ops.tuner_ops.sleep) 2907 ret = fe->ops.tuner_ops.sleep(fe); 2908 2909 if (fe->ops.sleep) 2910 ret = fe->ops.sleep(fe); 2911 2912 return ret; 2913 } 2914 EXPORT_SYMBOL(dvb_frontend_suspend); 2915 2916 int dvb_frontend_resume(struct dvb_frontend *fe) 2917 { 2918 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2919 int ret = 0; 2920 2921 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2922 fe->id); 2923 2924 fe->exit = DVB_FE_DEVICE_RESUME; 2925 if (fe->ops.init) 2926 ret = fe->ops.init(fe); 2927 2928 if (fe->ops.tuner_ops.resume) 2929 ret = fe->ops.tuner_ops.resume(fe); 2930 else if (fe->ops.tuner_ops.init) 2931 ret = fe->ops.tuner_ops.init(fe); 2932 2933 if (fe->ops.set_tone && fepriv->tone != -1) 2934 fe->ops.set_tone(fe, fepriv->tone); 2935 if (fe->ops.set_voltage && fepriv->voltage != -1) 2936 fe->ops.set_voltage(fe, fepriv->voltage); 2937 2938 fe->exit = DVB_FE_NO_EXIT; 2939 fepriv->state = FESTATE_RETUNE; 2940 dvb_frontend_wakeup(fe); 2941 2942 return ret; 2943 } 2944 EXPORT_SYMBOL(dvb_frontend_resume); 2945 2946 int dvb_register_frontend(struct dvb_adapter *dvb, 2947 struct dvb_frontend *fe) 2948 { 2949 struct dvb_frontend_private *fepriv; 2950 const struct dvb_device dvbdev_template = { 2951 .users = ~0, 2952 .writers = 1, 2953 .readers = (~0) - 1, 2954 .fops = &dvb_frontend_fops, 2955 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 2956 .name = fe->ops.info.name, 2957 #endif 2958 }; 2959 2960 dev_dbg(dvb->device, "%s:\n", __func__); 2961 2962 if (mutex_lock_interruptible(&frontend_mutex)) 2963 return -ERESTARTSYS; 2964 2965 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); 2966 if (!fe->frontend_priv) { 2967 mutex_unlock(&frontend_mutex); 2968 return -ENOMEM; 2969 } 2970 fepriv = fe->frontend_priv; 2971 2972 kref_init(&fe->refcount); 2973 2974 /* 2975 * After initialization, there need to be two references: one 2976 * for dvb_unregister_frontend(), and another one for 2977 * dvb_frontend_detach(). 2978 */ 2979 dvb_frontend_get(fe); 2980 2981 sema_init(&fepriv->sem, 1); 2982 init_waitqueue_head(&fepriv->wait_queue); 2983 init_waitqueue_head(&fepriv->events.wait_queue); 2984 mutex_init(&fepriv->events.mtx); 2985 fe->dvb = dvb; 2986 fepriv->inversion = INVERSION_OFF; 2987 2988 dev_info(fe->dvb->device, 2989 "DVB: registering adapter %i frontend %i (%s)...\n", 2990 fe->dvb->num, fe->id, fe->ops.info.name); 2991 2992 dvb_register_device(fe->dvb, &fepriv->dvbdev, &dvbdev_template, 2993 fe, DVB_DEVICE_FRONTEND, 0); 2994 2995 /* 2996 * Initialize the cache to the proper values according with the 2997 * first supported delivery system (ops->delsys[0]) 2998 */ 2999 3000 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0]; 3001 dvb_frontend_clear_cache(fe); 3002 3003 mutex_unlock(&frontend_mutex); 3004 return 0; 3005 } 3006 EXPORT_SYMBOL(dvb_register_frontend); 3007 3008 int dvb_unregister_frontend(struct dvb_frontend *fe) 3009 { 3010 struct dvb_frontend_private *fepriv = fe->frontend_priv; 3011 3012 dev_dbg(fe->dvb->device, "%s:\n", __func__); 3013 3014 mutex_lock(&frontend_mutex); 3015 dvb_frontend_stop(fe); 3016 dvb_remove_device(fepriv->dvbdev); 3017 3018 /* fe is invalid now */ 3019 mutex_unlock(&frontend_mutex); 3020 dvb_frontend_put(fe); 3021 return 0; 3022 } 3023 EXPORT_SYMBOL(dvb_unregister_frontend); 3024 3025 static void dvb_frontend_invoke_release(struct dvb_frontend *fe, 3026 void (*release)(struct dvb_frontend *fe)) 3027 { 3028 if (release) { 3029 release(fe); 3030 #ifdef CONFIG_MEDIA_ATTACH 3031 dvb_detach(release); 3032 #endif 3033 } 3034 } 3035 3036 void dvb_frontend_detach(struct dvb_frontend *fe) 3037 { 3038 dvb_frontend_invoke_release(fe, fe->ops.release_sec); 3039 dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release); 3040 dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release); 3041 dvb_frontend_invoke_release(fe, fe->ops.detach); 3042 dvb_frontend_put(fe); 3043 } 3044 EXPORT_SYMBOL(dvb_frontend_detach); 3045