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