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