1 /* 2 * dvb_frontend.c: DVB frontend tuning interface/thread 3 * 4 * 5 * Copyright (C) 1999-2001 Ralph Metzler 6 * Marcus Metzler 7 * Holger Waechtler 8 * for convergence integrated media GmbH 9 * 10 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup) 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License 14 * as published by the Free Software Foundation; either version 2 15 * of the License, or (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * To obtain the license, point your browser to 22 * http://www.gnu.org/copyleft/gpl.html 23 */ 24 25 /* Enables DVBv3 compatibility bits at the headers */ 26 #define __DVB_CORE__ 27 28 #define pr_fmt(fmt) "dvb_frontend: " fmt 29 30 #include <linux/string.h> 31 #include <linux/kernel.h> 32 #include <linux/sched/signal.h> 33 #include <linux/wait.h> 34 #include <linux/slab.h> 35 #include <linux/poll.h> 36 #include <linux/semaphore.h> 37 #include <linux/module.h> 38 #include <linux/list.h> 39 #include <linux/freezer.h> 40 #include <linux/jiffies.h> 41 #include <linux/kthread.h> 42 #include <linux/ktime.h> 43 #include <linux/compat.h> 44 #include <asm/processor.h> 45 46 #include <media/dvb_frontend.h> 47 #include <media/dvbdev.h> 48 #include <linux/dvb/version.h> 49 50 static int dvb_frontend_debug; 51 static int dvb_shutdown_timeout; 52 static int dvb_force_auto_inversion; 53 static int dvb_override_tune_delay; 54 static int dvb_powerdown_on_sleep = 1; 55 static int dvb_mfe_wait_time = 5; 56 57 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644); 58 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off)."); 59 module_param(dvb_shutdown_timeout, int, 0644); 60 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); 61 module_param(dvb_force_auto_inversion, int, 0644); 62 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); 63 module_param(dvb_override_tune_delay, int, 0644); 64 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt"); 65 module_param(dvb_powerdown_on_sleep, int, 0644); 66 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)"); 67 module_param(dvb_mfe_wait_time, int, 0644); 68 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)"); 69 70 #define dprintk(fmt, arg...) \ 71 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg) 72 73 #define FESTATE_IDLE 1 74 #define FESTATE_RETUNE 2 75 #define FESTATE_TUNING_FAST 4 76 #define FESTATE_TUNING_SLOW 8 77 #define FESTATE_TUNED 16 78 #define FESTATE_ZIGZAG_FAST 32 79 #define FESTATE_ZIGZAG_SLOW 64 80 #define FESTATE_DISEQC 128 81 #define FESTATE_ERROR 256 82 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) 83 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) 84 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) 85 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) 86 87 /* 88 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. 89 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. 90 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. 91 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. 92 * FESTATE_TUNED. The frontend has successfully locked on. 93 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. 94 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. 95 * FESTATE_DISEQC. A DISEQC command has just been issued. 96 * FESTATE_WAITFORLOCK. When we're waiting for a lock. 97 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. 98 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. 99 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. 100 */ 101 102 static DEFINE_MUTEX(frontend_mutex); 103 104 struct dvb_frontend_private { 105 /* thread/frontend values */ 106 struct dvb_device *dvbdev; 107 struct dvb_frontend_parameters parameters_out; 108 struct dvb_fe_events events; 109 struct semaphore sem; 110 struct list_head list_head; 111 wait_queue_head_t wait_queue; 112 struct task_struct *thread; 113 unsigned long release_jiffies; 114 unsigned int wakeup; 115 enum fe_status status; 116 unsigned long tune_mode_flags; 117 unsigned int delay; 118 unsigned int reinitialise; 119 int tone; 120 int voltage; 121 122 /* swzigzag values */ 123 unsigned int state; 124 unsigned int bending; 125 int lnb_drift; 126 unsigned int inversion; 127 unsigned int auto_step; 128 unsigned int auto_sub_step; 129 unsigned int started_auto_step; 130 unsigned int min_delay; 131 unsigned int max_drift; 132 unsigned int step_size; 133 int quality; 134 unsigned int check_wrapped; 135 enum dvbfe_search algo_status; 136 137 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 138 struct media_pipeline pipe; 139 #endif 140 }; 141 142 static void dvb_frontend_invoke_release(struct dvb_frontend *fe, 143 void (*release)(struct dvb_frontend *fe)); 144 145 static void __dvb_frontend_free(struct dvb_frontend *fe) 146 { 147 struct dvb_frontend_private *fepriv = fe->frontend_priv; 148 149 if (fepriv) 150 dvb_free_device(fepriv->dvbdev); 151 152 dvb_frontend_invoke_release(fe, fe->ops.release); 153 154 kfree(fepriv); 155 } 156 157 static void dvb_frontend_free(struct kref *ref) 158 { 159 struct dvb_frontend *fe = 160 container_of(ref, struct dvb_frontend, refcount); 161 162 __dvb_frontend_free(fe); 163 } 164 165 static void dvb_frontend_put(struct dvb_frontend *fe) 166 { 167 /* 168 * Check if the frontend was registered, as otherwise 169 * kref was not initialized yet. 170 */ 171 if (fe->frontend_priv) 172 kref_put(&fe->refcount, dvb_frontend_free); 173 else 174 __dvb_frontend_free(fe); 175 } 176 177 static void dvb_frontend_get(struct dvb_frontend *fe) 178 { 179 kref_get(&fe->refcount); 180 } 181 182 static void dvb_frontend_wakeup(struct dvb_frontend *fe); 183 static int dtv_get_frontend(struct dvb_frontend *fe, 184 struct dtv_frontend_properties *c, 185 struct dvb_frontend_parameters *p_out); 186 static int 187 dtv_property_legacy_params_sync(struct dvb_frontend *fe, 188 const struct dtv_frontend_properties *c, 189 struct dvb_frontend_parameters *p); 190 191 static bool has_get_frontend(struct dvb_frontend *fe) 192 { 193 return fe->ops.get_frontend != 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 c->scrambling_sequence_index = 0;/* default sequence */ 986 987 switch (c->delivery_system) { 988 case SYS_DVBS: 989 case SYS_DVBS2: 990 case SYS_TURBO: 991 c->modulation = QPSK; /* implied for DVB-S in legacy API */ 992 c->rolloff = ROLLOFF_35;/* implied for DVB-S */ 993 break; 994 case SYS_ATSC: 995 c->modulation = VSB_8; 996 break; 997 case SYS_ISDBS: 998 c->symbol_rate = 28860000; 999 c->rolloff = ROLLOFF_35; 1000 c->bandwidth_hz = c->symbol_rate / 100 * 135; 1001 break; 1002 default: 1003 c->modulation = QAM_AUTO; 1004 break; 1005 } 1006 1007 c->lna = LNA_AUTO; 1008 1009 return 0; 1010 } 1011 1012 #define _DTV_CMD(n, s, b) \ 1013 [n] = { \ 1014 .name = #n, \ 1015 .cmd = n, \ 1016 .set = s,\ 1017 .buffer = b \ 1018 } 1019 1020 struct dtv_cmds_h { 1021 char *name; /* A display name for debugging purposes */ 1022 1023 __u32 cmd; /* A unique ID */ 1024 1025 /* Flags */ 1026 __u32 set:1; /* Either a set or get property */ 1027 __u32 buffer:1; /* Does this property use the buffer? */ 1028 __u32 reserved:30; /* Align */ 1029 }; 1030 1031 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = { 1032 _DTV_CMD(DTV_TUNE, 1, 0), 1033 _DTV_CMD(DTV_CLEAR, 1, 0), 1034 1035 /* Set */ 1036 _DTV_CMD(DTV_FREQUENCY, 1, 0), 1037 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), 1038 _DTV_CMD(DTV_MODULATION, 1, 0), 1039 _DTV_CMD(DTV_INVERSION, 1, 0), 1040 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), 1041 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), 1042 _DTV_CMD(DTV_INNER_FEC, 1, 0), 1043 _DTV_CMD(DTV_VOLTAGE, 1, 0), 1044 _DTV_CMD(DTV_TONE, 1, 0), 1045 _DTV_CMD(DTV_PILOT, 1, 0), 1046 _DTV_CMD(DTV_ROLLOFF, 1, 0), 1047 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), 1048 _DTV_CMD(DTV_HIERARCHY, 1, 0), 1049 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), 1050 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), 1051 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), 1052 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), 1053 _DTV_CMD(DTV_INTERLEAVING, 1, 0), 1054 1055 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), 1056 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), 1057 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), 1058 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), 1059 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), 1060 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), 1061 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), 1062 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), 1063 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), 1064 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), 1065 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), 1066 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), 1067 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), 1068 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), 1069 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), 1070 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), 1071 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), 1072 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), 1073 1074 _DTV_CMD(DTV_STREAM_ID, 1, 0), 1075 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0), 1076 _DTV_CMD(DTV_SCRAMBLING_SEQUENCE_INDEX, 1, 0), 1077 _DTV_CMD(DTV_LNA, 1, 0), 1078 1079 /* Get */ 1080 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), 1081 _DTV_CMD(DTV_API_VERSION, 0, 0), 1082 1083 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0), 1084 1085 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0), 1086 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0), 1087 1088 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0), 1089 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0), 1090 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0), 1091 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0), 1092 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0), 1093 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0), 1094 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0), 1095 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0), 1096 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0), 1097 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0), 1098 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0), 1099 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0), 1100 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0), 1101 1102 /* Statistics API */ 1103 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0), 1104 _DTV_CMD(DTV_STAT_CNR, 0, 0), 1105 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0), 1106 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0), 1107 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0), 1108 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0), 1109 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0), 1110 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0), 1111 }; 1112 1113 /* Synchronise the legacy tuning parameters into the cache, so that demodulator 1114 * drivers can use a single set_frontend tuning function, regardless of whether 1115 * it's being used for the legacy or new API, reducing code and complexity. 1116 */ 1117 static int dtv_property_cache_sync(struct dvb_frontend *fe, 1118 struct dtv_frontend_properties *c, 1119 const struct dvb_frontend_parameters *p) 1120 { 1121 c->frequency = p->frequency; 1122 c->inversion = p->inversion; 1123 1124 switch (dvbv3_type(c->delivery_system)) { 1125 case DVBV3_QPSK: 1126 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1127 c->symbol_rate = p->u.qpsk.symbol_rate; 1128 c->fec_inner = p->u.qpsk.fec_inner; 1129 break; 1130 case DVBV3_QAM: 1131 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1132 c->symbol_rate = p->u.qam.symbol_rate; 1133 c->fec_inner = p->u.qam.fec_inner; 1134 c->modulation = p->u.qam.modulation; 1135 break; 1136 case DVBV3_OFDM: 1137 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1138 1139 switch (p->u.ofdm.bandwidth) { 1140 case BANDWIDTH_10_MHZ: 1141 c->bandwidth_hz = 10000000; 1142 break; 1143 case BANDWIDTH_8_MHZ: 1144 c->bandwidth_hz = 8000000; 1145 break; 1146 case BANDWIDTH_7_MHZ: 1147 c->bandwidth_hz = 7000000; 1148 break; 1149 case BANDWIDTH_6_MHZ: 1150 c->bandwidth_hz = 6000000; 1151 break; 1152 case BANDWIDTH_5_MHZ: 1153 c->bandwidth_hz = 5000000; 1154 break; 1155 case BANDWIDTH_1_712_MHZ: 1156 c->bandwidth_hz = 1712000; 1157 break; 1158 case BANDWIDTH_AUTO: 1159 c->bandwidth_hz = 0; 1160 } 1161 1162 c->code_rate_HP = p->u.ofdm.code_rate_HP; 1163 c->code_rate_LP = p->u.ofdm.code_rate_LP; 1164 c->modulation = p->u.ofdm.constellation; 1165 c->transmission_mode = p->u.ofdm.transmission_mode; 1166 c->guard_interval = p->u.ofdm.guard_interval; 1167 c->hierarchy = p->u.ofdm.hierarchy_information; 1168 break; 1169 case DVBV3_ATSC: 1170 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__); 1171 c->modulation = p->u.vsb.modulation; 1172 if (c->delivery_system == SYS_ATSCMH) 1173 break; 1174 if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) 1175 c->delivery_system = SYS_ATSC; 1176 else 1177 c->delivery_system = SYS_DVBC_ANNEX_B; 1178 break; 1179 case DVBV3_UNKNOWN: 1180 dev_err(fe->dvb->device, 1181 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1182 __func__, c->delivery_system); 1183 return -EINVAL; 1184 } 1185 1186 return 0; 1187 } 1188 1189 /* Ensure the cached values are set correctly in the frontend 1190 * legacy tuning structures, for the advanced tuning API. 1191 */ 1192 static int 1193 dtv_property_legacy_params_sync(struct dvb_frontend *fe, 1194 const struct dtv_frontend_properties *c, 1195 struct dvb_frontend_parameters *p) 1196 { 1197 p->frequency = c->frequency; 1198 p->inversion = c->inversion; 1199 1200 switch (dvbv3_type(c->delivery_system)) { 1201 case DVBV3_UNKNOWN: 1202 dev_err(fe->dvb->device, 1203 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1204 __func__, c->delivery_system); 1205 return -EINVAL; 1206 case DVBV3_QPSK: 1207 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1208 p->u.qpsk.symbol_rate = c->symbol_rate; 1209 p->u.qpsk.fec_inner = c->fec_inner; 1210 break; 1211 case DVBV3_QAM: 1212 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1213 p->u.qam.symbol_rate = c->symbol_rate; 1214 p->u.qam.fec_inner = c->fec_inner; 1215 p->u.qam.modulation = c->modulation; 1216 break; 1217 case DVBV3_OFDM: 1218 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1219 switch (c->bandwidth_hz) { 1220 case 10000000: 1221 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ; 1222 break; 1223 case 8000000: 1224 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1225 break; 1226 case 7000000: 1227 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1228 break; 1229 case 6000000: 1230 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1231 break; 1232 case 5000000: 1233 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ; 1234 break; 1235 case 1712000: 1236 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ; 1237 break; 1238 case 0: 1239 default: 1240 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1241 } 1242 p->u.ofdm.code_rate_HP = c->code_rate_HP; 1243 p->u.ofdm.code_rate_LP = c->code_rate_LP; 1244 p->u.ofdm.constellation = c->modulation; 1245 p->u.ofdm.transmission_mode = c->transmission_mode; 1246 p->u.ofdm.guard_interval = c->guard_interval; 1247 p->u.ofdm.hierarchy_information = c->hierarchy; 1248 break; 1249 case DVBV3_ATSC: 1250 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__); 1251 p->u.vsb.modulation = c->modulation; 1252 break; 1253 } 1254 return 0; 1255 } 1256 1257 /** 1258 * dtv_get_frontend - calls a callback for retrieving DTV parameters 1259 * @fe: struct dvb_frontend pointer 1260 * @c: struct dtv_frontend_properties pointer (DVBv5 cache) 1261 * @p_out: struct dvb_frontend_parameters pointer (DVBv3 FE struct) 1262 * 1263 * This routine calls either the DVBv3 or DVBv5 get_frontend call. 1264 * If c is not null, it will update the DVBv5 cache struct pointed by it. 1265 * If p_out is not null, it will update the DVBv3 params pointed by it. 1266 */ 1267 static int dtv_get_frontend(struct dvb_frontend *fe, 1268 struct dtv_frontend_properties *c, 1269 struct dvb_frontend_parameters *p_out) 1270 { 1271 int r; 1272 1273 if (fe->ops.get_frontend) { 1274 r = fe->ops.get_frontend(fe, c); 1275 if (unlikely(r < 0)) 1276 return r; 1277 if (p_out) 1278 dtv_property_legacy_params_sync(fe, c, p_out); 1279 return 0; 1280 } 1281 1282 /* As everything is in cache, get_frontend fops are always supported */ 1283 return 0; 1284 } 1285 1286 static int dvb_frontend_handle_ioctl(struct file *file, 1287 unsigned int cmd, void *parg); 1288 1289 static int dtv_property_process_get(struct dvb_frontend *fe, 1290 const struct dtv_frontend_properties *c, 1291 struct dtv_property *tvp, 1292 struct file *file) 1293 { 1294 int ncaps; 1295 1296 switch(tvp->cmd) { 1297 case DTV_ENUM_DELSYS: 1298 ncaps = 0; 1299 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1300 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps]; 1301 ncaps++; 1302 } 1303 tvp->u.buffer.len = ncaps; 1304 break; 1305 case DTV_FREQUENCY: 1306 tvp->u.data = c->frequency; 1307 break; 1308 case DTV_MODULATION: 1309 tvp->u.data = c->modulation; 1310 break; 1311 case DTV_BANDWIDTH_HZ: 1312 tvp->u.data = c->bandwidth_hz; 1313 break; 1314 case DTV_INVERSION: 1315 tvp->u.data = c->inversion; 1316 break; 1317 case DTV_SYMBOL_RATE: 1318 tvp->u.data = c->symbol_rate; 1319 break; 1320 case DTV_INNER_FEC: 1321 tvp->u.data = c->fec_inner; 1322 break; 1323 case DTV_PILOT: 1324 tvp->u.data = c->pilot; 1325 break; 1326 case DTV_ROLLOFF: 1327 tvp->u.data = c->rolloff; 1328 break; 1329 case DTV_DELIVERY_SYSTEM: 1330 tvp->u.data = c->delivery_system; 1331 break; 1332 case DTV_VOLTAGE: 1333 tvp->u.data = c->voltage; 1334 break; 1335 case DTV_TONE: 1336 tvp->u.data = c->sectone; 1337 break; 1338 case DTV_API_VERSION: 1339 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; 1340 break; 1341 case DTV_CODE_RATE_HP: 1342 tvp->u.data = c->code_rate_HP; 1343 break; 1344 case DTV_CODE_RATE_LP: 1345 tvp->u.data = c->code_rate_LP; 1346 break; 1347 case DTV_GUARD_INTERVAL: 1348 tvp->u.data = c->guard_interval; 1349 break; 1350 case DTV_TRANSMISSION_MODE: 1351 tvp->u.data = c->transmission_mode; 1352 break; 1353 case DTV_HIERARCHY: 1354 tvp->u.data = c->hierarchy; 1355 break; 1356 case DTV_INTERLEAVING: 1357 tvp->u.data = c->interleaving; 1358 break; 1359 1360 /* ISDB-T Support here */ 1361 case DTV_ISDBT_PARTIAL_RECEPTION: 1362 tvp->u.data = c->isdbt_partial_reception; 1363 break; 1364 case DTV_ISDBT_SOUND_BROADCASTING: 1365 tvp->u.data = c->isdbt_sb_mode; 1366 break; 1367 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1368 tvp->u.data = c->isdbt_sb_subchannel; 1369 break; 1370 case DTV_ISDBT_SB_SEGMENT_IDX: 1371 tvp->u.data = c->isdbt_sb_segment_idx; 1372 break; 1373 case DTV_ISDBT_SB_SEGMENT_COUNT: 1374 tvp->u.data = c->isdbt_sb_segment_count; 1375 break; 1376 case DTV_ISDBT_LAYER_ENABLED: 1377 tvp->u.data = c->isdbt_layer_enabled; 1378 break; 1379 case DTV_ISDBT_LAYERA_FEC: 1380 tvp->u.data = c->layer[0].fec; 1381 break; 1382 case DTV_ISDBT_LAYERA_MODULATION: 1383 tvp->u.data = c->layer[0].modulation; 1384 break; 1385 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1386 tvp->u.data = c->layer[0].segment_count; 1387 break; 1388 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1389 tvp->u.data = c->layer[0].interleaving; 1390 break; 1391 case DTV_ISDBT_LAYERB_FEC: 1392 tvp->u.data = c->layer[1].fec; 1393 break; 1394 case DTV_ISDBT_LAYERB_MODULATION: 1395 tvp->u.data = c->layer[1].modulation; 1396 break; 1397 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1398 tvp->u.data = c->layer[1].segment_count; 1399 break; 1400 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1401 tvp->u.data = c->layer[1].interleaving; 1402 break; 1403 case DTV_ISDBT_LAYERC_FEC: 1404 tvp->u.data = c->layer[2].fec; 1405 break; 1406 case DTV_ISDBT_LAYERC_MODULATION: 1407 tvp->u.data = c->layer[2].modulation; 1408 break; 1409 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1410 tvp->u.data = c->layer[2].segment_count; 1411 break; 1412 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1413 tvp->u.data = c->layer[2].interleaving; 1414 break; 1415 1416 /* Multistream support */ 1417 case DTV_STREAM_ID: 1418 case DTV_DVBT2_PLP_ID_LEGACY: 1419 tvp->u.data = c->stream_id; 1420 break; 1421 1422 /* Physical layer scrambling support */ 1423 case DTV_SCRAMBLING_SEQUENCE_INDEX: 1424 tvp->u.data = c->scrambling_sequence_index; 1425 break; 1426 1427 /* ATSC-MH */ 1428 case DTV_ATSCMH_FIC_VER: 1429 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver; 1430 break; 1431 case DTV_ATSCMH_PARADE_ID: 1432 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id; 1433 break; 1434 case DTV_ATSCMH_NOG: 1435 tvp->u.data = fe->dtv_property_cache.atscmh_nog; 1436 break; 1437 case DTV_ATSCMH_TNOG: 1438 tvp->u.data = fe->dtv_property_cache.atscmh_tnog; 1439 break; 1440 case DTV_ATSCMH_SGN: 1441 tvp->u.data = fe->dtv_property_cache.atscmh_sgn; 1442 break; 1443 case DTV_ATSCMH_PRC: 1444 tvp->u.data = fe->dtv_property_cache.atscmh_prc; 1445 break; 1446 case DTV_ATSCMH_RS_FRAME_MODE: 1447 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode; 1448 break; 1449 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1450 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble; 1451 break; 1452 case DTV_ATSCMH_RS_CODE_MODE_PRI: 1453 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri; 1454 break; 1455 case DTV_ATSCMH_RS_CODE_MODE_SEC: 1456 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec; 1457 break; 1458 case DTV_ATSCMH_SCCC_BLOCK_MODE: 1459 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode; 1460 break; 1461 case DTV_ATSCMH_SCCC_CODE_MODE_A: 1462 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a; 1463 break; 1464 case DTV_ATSCMH_SCCC_CODE_MODE_B: 1465 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b; 1466 break; 1467 case DTV_ATSCMH_SCCC_CODE_MODE_C: 1468 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c; 1469 break; 1470 case DTV_ATSCMH_SCCC_CODE_MODE_D: 1471 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d; 1472 break; 1473 1474 case DTV_LNA: 1475 tvp->u.data = c->lna; 1476 break; 1477 1478 /* Fill quality measures */ 1479 case DTV_STAT_SIGNAL_STRENGTH: 1480 tvp->u.st = c->strength; 1481 break; 1482 case DTV_STAT_CNR: 1483 tvp->u.st = c->cnr; 1484 break; 1485 case DTV_STAT_PRE_ERROR_BIT_COUNT: 1486 tvp->u.st = c->pre_bit_error; 1487 break; 1488 case DTV_STAT_PRE_TOTAL_BIT_COUNT: 1489 tvp->u.st = c->pre_bit_count; 1490 break; 1491 case DTV_STAT_POST_ERROR_BIT_COUNT: 1492 tvp->u.st = c->post_bit_error; 1493 break; 1494 case DTV_STAT_POST_TOTAL_BIT_COUNT: 1495 tvp->u.st = c->post_bit_count; 1496 break; 1497 case DTV_STAT_ERROR_BLOCK_COUNT: 1498 tvp->u.st = c->block_error; 1499 break; 1500 case DTV_STAT_TOTAL_BLOCK_COUNT: 1501 tvp->u.st = c->block_count; 1502 break; 1503 default: 1504 dev_dbg(fe->dvb->device, 1505 "%s: FE property %d doesn't exist\n", 1506 __func__, tvp->cmd); 1507 return -EINVAL; 1508 } 1509 1510 if (!dtv_cmds[tvp->cmd].buffer) 1511 dev_dbg(fe->dvb->device, 1512 "%s: GET cmd 0x%08x (%s) = 0x%08x\n", 1513 __func__, tvp->cmd, dtv_cmds[tvp->cmd].name, 1514 tvp->u.data); 1515 else 1516 dev_dbg(fe->dvb->device, 1517 "%s: GET cmd 0x%08x (%s) len %d: %*ph\n", 1518 __func__, 1519 tvp->cmd, dtv_cmds[tvp->cmd].name, 1520 tvp->u.buffer.len, 1521 tvp->u.buffer.len, tvp->u.buffer.data); 1522 1523 return 0; 1524 } 1525 1526 static int dtv_set_frontend(struct dvb_frontend *fe); 1527 1528 static bool is_dvbv3_delsys(u32 delsys) 1529 { 1530 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) || 1531 (delsys == SYS_DVBS) || (delsys == SYS_ATSC); 1532 } 1533 1534 /** 1535 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type 1536 * @fe: struct frontend; 1537 * @delsys: DVBv5 type that will be used for emulation 1538 * 1539 * Provides emulation for delivery systems that are compatible with the old 1540 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows 1541 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent 1542 * parameters are compatible with DVB-S spec. 1543 */ 1544 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys) 1545 { 1546 int i; 1547 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1548 1549 c->delivery_system = delsys; 1550 1551 /* 1552 * If the call is for ISDB-T, put it into full-seg, auto mode, TV 1553 */ 1554 if (c->delivery_system == SYS_ISDBT) { 1555 dev_dbg(fe->dvb->device, 1556 "%s: Using defaults for SYS_ISDBT\n", 1557 __func__); 1558 1559 if (!c->bandwidth_hz) 1560 c->bandwidth_hz = 6000000; 1561 1562 c->isdbt_partial_reception = 0; 1563 c->isdbt_sb_mode = 0; 1564 c->isdbt_sb_subchannel = 0; 1565 c->isdbt_sb_segment_idx = 0; 1566 c->isdbt_sb_segment_count = 0; 1567 c->isdbt_layer_enabled = 7; 1568 for (i = 0; i < 3; i++) { 1569 c->layer[i].fec = FEC_AUTO; 1570 c->layer[i].modulation = QAM_AUTO; 1571 c->layer[i].interleaving = 0; 1572 c->layer[i].segment_count = 0; 1573 } 1574 } 1575 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n", 1576 __func__, c->delivery_system); 1577 1578 return 0; 1579 } 1580 1581 /** 1582 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call 1583 * @fe: frontend struct 1584 * @desired_system: delivery system requested by the user 1585 * 1586 * A DVBv5 call know what's the desired system it wants. So, set it. 1587 * 1588 * There are, however, a few known issues with early DVBv5 applications that 1589 * are also handled by this logic: 1590 * 1591 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system. 1592 * This is an API violation, but, as we don't want to break userspace, 1593 * convert it to the first supported delivery system. 1594 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for 1595 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of 1596 * ISDB-T provided backward compat with DVB-T. 1597 */ 1598 static int dvbv5_set_delivery_system(struct dvb_frontend *fe, 1599 u32 desired_system) 1600 { 1601 int ncaps; 1602 u32 delsys = SYS_UNDEFINED; 1603 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1604 enum dvbv3_emulation_type type; 1605 1606 /* 1607 * It was reported that some old DVBv5 applications were 1608 * filling delivery_system with SYS_UNDEFINED. If this happens, 1609 * assume that the application wants to use the first supported 1610 * delivery system. 1611 */ 1612 if (desired_system == SYS_UNDEFINED) 1613 desired_system = fe->ops.delsys[0]; 1614 1615 /* 1616 * This is a DVBv5 call. So, it likely knows the supported 1617 * delivery systems. So, check if the desired delivery system is 1618 * supported 1619 */ 1620 ncaps = 0; 1621 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1622 if (fe->ops.delsys[ncaps] == desired_system) { 1623 c->delivery_system = desired_system; 1624 dev_dbg(fe->dvb->device, 1625 "%s: Changing delivery system to %d\n", 1626 __func__, desired_system); 1627 return 0; 1628 } 1629 ncaps++; 1630 } 1631 1632 /* 1633 * The requested delivery system isn't supported. Maybe userspace 1634 * is requesting a DVBv3 compatible delivery system. 1635 * 1636 * The emulation only works if the desired system is one of the 1637 * delivery systems supported by DVBv3 API 1638 */ 1639 if (!is_dvbv3_delsys(desired_system)) { 1640 dev_dbg(fe->dvb->device, 1641 "%s: Delivery system %d not supported.\n", 1642 __func__, desired_system); 1643 return -EINVAL; 1644 } 1645 1646 type = dvbv3_type(desired_system); 1647 1648 /* 1649 * Get the last non-DVBv3 delivery system that has the same type 1650 * of the desired system 1651 */ 1652 ncaps = 0; 1653 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1654 if (dvbv3_type(fe->ops.delsys[ncaps]) == type) 1655 delsys = fe->ops.delsys[ncaps]; 1656 ncaps++; 1657 } 1658 1659 /* There's nothing compatible with the desired delivery system */ 1660 if (delsys == SYS_UNDEFINED) { 1661 dev_dbg(fe->dvb->device, 1662 "%s: Delivery system %d not supported on emulation mode.\n", 1663 __func__, desired_system); 1664 return -EINVAL; 1665 } 1666 1667 dev_dbg(fe->dvb->device, 1668 "%s: Using delivery system %d emulated as if it were %d\n", 1669 __func__, delsys, desired_system); 1670 1671 return emulate_delivery_system(fe, desired_system); 1672 } 1673 1674 /** 1675 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call 1676 * @fe: frontend struct 1677 * 1678 * A DVBv3 call doesn't know what's the desired system it wants. It also 1679 * doesn't allow to switch between different types. Due to that, userspace 1680 * should use DVBv5 instead. 1681 * However, in order to avoid breaking userspace API, limited backward 1682 * compatibility support is provided. 1683 * 1684 * There are some delivery systems that are incompatible with DVBv3 calls. 1685 * 1686 * This routine should work fine for frontends that support just one delivery 1687 * system. 1688 * 1689 * For frontends that support multiple frontends: 1690 * 1) It defaults to use the first supported delivery system. There's an 1691 * userspace application that allows changing it at runtime; 1692 * 1693 * 2) If the current delivery system is not compatible with DVBv3, it gets 1694 * the first one that it is compatible. 1695 * 1696 * NOTE: in order for this to work with applications like Kaffeine that 1697 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to 1698 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the 1699 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back 1700 * to DVB-S. 1701 */ 1702 static int dvbv3_set_delivery_system(struct dvb_frontend *fe) 1703 { 1704 int ncaps; 1705 u32 delsys = SYS_UNDEFINED; 1706 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1707 1708 /* If not set yet, defaults to the first supported delivery system */ 1709 if (c->delivery_system == SYS_UNDEFINED) 1710 c->delivery_system = fe->ops.delsys[0]; 1711 1712 /* 1713 * Trivial case: just use the current one, if it already a DVBv3 1714 * delivery system 1715 */ 1716 if (is_dvbv3_delsys(c->delivery_system)) { 1717 dev_dbg(fe->dvb->device, 1718 "%s: Using delivery system to %d\n", 1719 __func__, c->delivery_system); 1720 return 0; 1721 } 1722 1723 /* 1724 * Seek for the first delivery system that it is compatible with a 1725 * DVBv3 standard 1726 */ 1727 ncaps = 0; 1728 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1729 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) { 1730 delsys = fe->ops.delsys[ncaps]; 1731 break; 1732 } 1733 ncaps++; 1734 } 1735 if (delsys == SYS_UNDEFINED) { 1736 dev_dbg(fe->dvb->device, 1737 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n", 1738 __func__); 1739 return -EINVAL; 1740 } 1741 return emulate_delivery_system(fe, delsys); 1742 } 1743 1744 /** 1745 * dtv_property_process_set - Sets a single DTV property 1746 * @fe: Pointer to &struct dvb_frontend 1747 * @file: Pointer to &struct file 1748 * @cmd: Digital TV command 1749 * @data: An unsigned 32-bits number 1750 * 1751 * This routine assigns the property 1752 * value to the corresponding member of 1753 * &struct dtv_frontend_properties 1754 * 1755 * Returns: 1756 * Zero on success, negative errno on failure. 1757 */ 1758 static int dtv_property_process_set(struct dvb_frontend *fe, 1759 struct file *file, 1760 u32 cmd, u32 data) 1761 { 1762 int r = 0; 1763 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1764 1765 /** Dump DTV command name and value*/ 1766 if (!cmd || cmd > DTV_MAX_COMMAND) 1767 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n", 1768 __func__, cmd); 1769 else 1770 dev_dbg(fe->dvb->device, 1771 "%s: SET cmd 0x%08x (%s) to 0x%08x\n", 1772 __func__, cmd, dtv_cmds[cmd].name, data); 1773 switch (cmd) { 1774 case DTV_CLEAR: 1775 /* 1776 * Reset a cache of data specific to the frontend here. This does 1777 * not effect hardware. 1778 */ 1779 dvb_frontend_clear_cache(fe); 1780 break; 1781 case DTV_TUNE: 1782 /* 1783 * Use the cached Digital TV properties to tune the 1784 * frontend 1785 */ 1786 dev_dbg(fe->dvb->device, 1787 "%s: Setting the frontend from property cache\n", 1788 __func__); 1789 1790 r = dtv_set_frontend(fe); 1791 break; 1792 case DTV_FREQUENCY: 1793 c->frequency = data; 1794 break; 1795 case DTV_MODULATION: 1796 c->modulation = data; 1797 break; 1798 case DTV_BANDWIDTH_HZ: 1799 c->bandwidth_hz = data; 1800 break; 1801 case DTV_INVERSION: 1802 c->inversion = data; 1803 break; 1804 case DTV_SYMBOL_RATE: 1805 c->symbol_rate = data; 1806 break; 1807 case DTV_INNER_FEC: 1808 c->fec_inner = data; 1809 break; 1810 case DTV_PILOT: 1811 c->pilot = data; 1812 break; 1813 case DTV_ROLLOFF: 1814 c->rolloff = data; 1815 break; 1816 case DTV_DELIVERY_SYSTEM: 1817 r = dvbv5_set_delivery_system(fe, data); 1818 break; 1819 case DTV_VOLTAGE: 1820 c->voltage = data; 1821 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE, 1822 (void *)c->voltage); 1823 break; 1824 case DTV_TONE: 1825 c->sectone = data; 1826 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE, 1827 (void *)c->sectone); 1828 break; 1829 case DTV_CODE_RATE_HP: 1830 c->code_rate_HP = data; 1831 break; 1832 case DTV_CODE_RATE_LP: 1833 c->code_rate_LP = data; 1834 break; 1835 case DTV_GUARD_INTERVAL: 1836 c->guard_interval = data; 1837 break; 1838 case DTV_TRANSMISSION_MODE: 1839 c->transmission_mode = data; 1840 break; 1841 case DTV_HIERARCHY: 1842 c->hierarchy = data; 1843 break; 1844 case DTV_INTERLEAVING: 1845 c->interleaving = data; 1846 break; 1847 1848 /* ISDB-T Support here */ 1849 case DTV_ISDBT_PARTIAL_RECEPTION: 1850 c->isdbt_partial_reception = data; 1851 break; 1852 case DTV_ISDBT_SOUND_BROADCASTING: 1853 c->isdbt_sb_mode = data; 1854 break; 1855 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1856 c->isdbt_sb_subchannel = data; 1857 break; 1858 case DTV_ISDBT_SB_SEGMENT_IDX: 1859 c->isdbt_sb_segment_idx = data; 1860 break; 1861 case DTV_ISDBT_SB_SEGMENT_COUNT: 1862 c->isdbt_sb_segment_count = data; 1863 break; 1864 case DTV_ISDBT_LAYER_ENABLED: 1865 c->isdbt_layer_enabled = data; 1866 break; 1867 case DTV_ISDBT_LAYERA_FEC: 1868 c->layer[0].fec = data; 1869 break; 1870 case DTV_ISDBT_LAYERA_MODULATION: 1871 c->layer[0].modulation = data; 1872 break; 1873 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1874 c->layer[0].segment_count = data; 1875 break; 1876 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1877 c->layer[0].interleaving = data; 1878 break; 1879 case DTV_ISDBT_LAYERB_FEC: 1880 c->layer[1].fec = data; 1881 break; 1882 case DTV_ISDBT_LAYERB_MODULATION: 1883 c->layer[1].modulation = data; 1884 break; 1885 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1886 c->layer[1].segment_count = data; 1887 break; 1888 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1889 c->layer[1].interleaving = data; 1890 break; 1891 case DTV_ISDBT_LAYERC_FEC: 1892 c->layer[2].fec = data; 1893 break; 1894 case DTV_ISDBT_LAYERC_MODULATION: 1895 c->layer[2].modulation = data; 1896 break; 1897 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1898 c->layer[2].segment_count = data; 1899 break; 1900 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1901 c->layer[2].interleaving = data; 1902 break; 1903 1904 /* Multistream support */ 1905 case DTV_STREAM_ID: 1906 case DTV_DVBT2_PLP_ID_LEGACY: 1907 c->stream_id = data; 1908 break; 1909 1910 /* Physical layer scrambling support */ 1911 case DTV_SCRAMBLING_SEQUENCE_INDEX: 1912 c->scrambling_sequence_index = data; 1913 break; 1914 1915 /* ATSC-MH */ 1916 case DTV_ATSCMH_PARADE_ID: 1917 fe->dtv_property_cache.atscmh_parade_id = data; 1918 break; 1919 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1920 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data; 1921 break; 1922 1923 case DTV_LNA: 1924 c->lna = data; 1925 if (fe->ops.set_lna) 1926 r = fe->ops.set_lna(fe); 1927 if (r < 0) 1928 c->lna = LNA_AUTO; 1929 break; 1930 1931 default: 1932 return -EINVAL; 1933 } 1934 1935 return r; 1936 } 1937 1938 static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd, 1939 void *parg) 1940 { 1941 struct dvb_device *dvbdev = file->private_data; 1942 struct dvb_frontend *fe = dvbdev->priv; 1943 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1944 int err; 1945 1946 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd)); 1947 if (down_interruptible(&fepriv->sem)) 1948 return -ERESTARTSYS; 1949 1950 if (fe->exit != DVB_FE_NO_EXIT) { 1951 up(&fepriv->sem); 1952 return -ENODEV; 1953 } 1954 1955 /* 1956 * If the frontend is opened in read-only mode, only the ioctls 1957 * that don't interfere with the tune logic should be accepted. 1958 * That allows an external application to monitor the DVB QoS and 1959 * statistics parameters. 1960 * 1961 * That matches all _IOR() ioctls, except for two special cases: 1962 * - FE_GET_EVENT is part of the tuning logic on a DVB application; 1963 * - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0 1964 * setup 1965 * So, those two ioctls should also return -EPERM, as otherwise 1966 * reading from them would interfere with a DVB tune application 1967 */ 1968 if ((file->f_flags & O_ACCMODE) == O_RDONLY 1969 && (_IOC_DIR(cmd) != _IOC_READ 1970 || cmd == FE_GET_EVENT 1971 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) { 1972 up(&fepriv->sem); 1973 return -EPERM; 1974 } 1975 1976 err = dvb_frontend_handle_ioctl(file, cmd, parg); 1977 1978 up(&fepriv->sem); 1979 return err; 1980 } 1981 1982 static long dvb_frontend_ioctl(struct file *file, unsigned int cmd, 1983 unsigned long arg) 1984 { 1985 struct dvb_device *dvbdev = file->private_data; 1986 1987 if (!dvbdev) 1988 return -ENODEV; 1989 1990 return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl); 1991 } 1992 1993 #ifdef CONFIG_COMPAT 1994 struct compat_dtv_property { 1995 __u32 cmd; 1996 __u32 reserved[3]; 1997 union { 1998 __u32 data; 1999 struct dtv_fe_stats st; 2000 struct { 2001 __u8 data[32]; 2002 __u32 len; 2003 __u32 reserved1[3]; 2004 compat_uptr_t reserved2; 2005 } buffer; 2006 } u; 2007 int result; 2008 } __attribute__ ((packed)); 2009 2010 struct compat_dtv_properties { 2011 __u32 num; 2012 compat_uptr_t props; 2013 }; 2014 2015 #define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties) 2016 #define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties) 2017 2018 static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd, 2019 unsigned long arg) 2020 { 2021 struct dvb_device *dvbdev = file->private_data; 2022 struct dvb_frontend *fe = dvbdev->priv; 2023 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2024 int i, err = 0; 2025 2026 if (cmd == COMPAT_FE_SET_PROPERTY) { 2027 struct compat_dtv_properties prop, *tvps = NULL; 2028 struct compat_dtv_property *tvp = NULL; 2029 2030 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop))) 2031 return -EFAULT; 2032 2033 tvps = ∝ 2034 2035 /* 2036 * Put an arbitrary limit on the number of messages that can 2037 * be sent at once 2038 */ 2039 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2040 return -EINVAL; 2041 2042 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp)); 2043 if (IS_ERR(tvp)) 2044 return PTR_ERR(tvp); 2045 2046 for (i = 0; i < tvps->num; i++) { 2047 err = dtv_property_process_set(fe, file, 2048 (tvp + i)->cmd, 2049 (tvp + i)->u.data); 2050 if (err < 0) { 2051 kfree(tvp); 2052 return err; 2053 } 2054 } 2055 kfree(tvp); 2056 } else if (cmd == COMPAT_FE_GET_PROPERTY) { 2057 struct compat_dtv_properties prop, *tvps = NULL; 2058 struct compat_dtv_property *tvp = NULL; 2059 struct dtv_frontend_properties getp = fe->dtv_property_cache; 2060 2061 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop))) 2062 return -EFAULT; 2063 2064 tvps = ∝ 2065 2066 /* 2067 * Put an arbitrary limit on the number of messages that can 2068 * be sent at once 2069 */ 2070 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2071 return -EINVAL; 2072 2073 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp)); 2074 if (IS_ERR(tvp)) 2075 return PTR_ERR(tvp); 2076 2077 /* 2078 * Let's use our own copy of property cache, in order to 2079 * avoid mangling with DTV zigzag logic, as drivers might 2080 * return crap, if they don't check if the data is available 2081 * before updating the properties cache. 2082 */ 2083 if (fepriv->state != FESTATE_IDLE) { 2084 err = dtv_get_frontend(fe, &getp, NULL); 2085 if (err < 0) { 2086 kfree(tvp); 2087 return err; 2088 } 2089 } 2090 for (i = 0; i < tvps->num; i++) { 2091 err = dtv_property_process_get( 2092 fe, &getp, (struct dtv_property *)tvp + i, file); 2093 if (err < 0) { 2094 kfree(tvp); 2095 return err; 2096 } 2097 } 2098 2099 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp, 2100 tvps->num * sizeof(struct compat_dtv_property))) { 2101 kfree(tvp); 2102 return -EFAULT; 2103 } 2104 kfree(tvp); 2105 } 2106 2107 return err; 2108 } 2109 2110 static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd, 2111 unsigned long arg) 2112 { 2113 struct dvb_device *dvbdev = file->private_data; 2114 struct dvb_frontend *fe = dvbdev->priv; 2115 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2116 int err; 2117 2118 if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) { 2119 if (down_interruptible(&fepriv->sem)) 2120 return -ERESTARTSYS; 2121 2122 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg); 2123 2124 up(&fepriv->sem); 2125 return err; 2126 } 2127 2128 return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); 2129 } 2130 #endif 2131 2132 static int dtv_set_frontend(struct dvb_frontend *fe) 2133 { 2134 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2135 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2136 struct dvb_frontend_tune_settings fetunesettings; 2137 u32 rolloff = 0; 2138 2139 if (dvb_frontend_check_parameters(fe) < 0) 2140 return -EINVAL; 2141 2142 /* 2143 * Initialize output parameters to match the values given by 2144 * the user. FE_SET_FRONTEND triggers an initial frontend event 2145 * with status = 0, which copies output parameters to userspace. 2146 */ 2147 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out); 2148 2149 /* 2150 * Be sure that the bandwidth will be filled for all 2151 * non-satellite systems, as tuners need to know what 2152 * low pass/Nyquist half filter should be applied, in 2153 * order to avoid inter-channel noise. 2154 * 2155 * ISDB-T and DVB-T/T2 already sets bandwidth. 2156 * ATSC and DVB-C don't set, so, the core should fill it. 2157 * 2158 * On DVB-C Annex A and C, the bandwidth is a function of 2159 * the roll-off and symbol rate. Annex B defines different 2160 * roll-off factors depending on the modulation. Fortunately, 2161 * Annex B is only used with 6MHz, so there's no need to 2162 * calculate it. 2163 * 2164 * While not officially supported, a side effect of handling it at 2165 * the cache level is that a program could retrieve the bandwidth 2166 * via DTV_BANDWIDTH_HZ, which may be useful for test programs. 2167 */ 2168 switch (c->delivery_system) { 2169 case SYS_ATSC: 2170 case SYS_DVBC_ANNEX_B: 2171 c->bandwidth_hz = 6000000; 2172 break; 2173 case SYS_DVBC_ANNEX_A: 2174 rolloff = 115; 2175 break; 2176 case SYS_DVBC_ANNEX_C: 2177 rolloff = 113; 2178 break; 2179 case SYS_DVBS: 2180 case SYS_TURBO: 2181 case SYS_ISDBS: 2182 rolloff = 135; 2183 break; 2184 case SYS_DVBS2: 2185 switch (c->rolloff) { 2186 case ROLLOFF_20: 2187 rolloff = 120; 2188 break; 2189 case ROLLOFF_25: 2190 rolloff = 125; 2191 break; 2192 default: 2193 case ROLLOFF_35: 2194 rolloff = 135; 2195 } 2196 break; 2197 default: 2198 break; 2199 } 2200 if (rolloff) 2201 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100); 2202 2203 /* force auto frequency inversion if requested */ 2204 if (dvb_force_auto_inversion) 2205 c->inversion = INVERSION_AUTO; 2206 2207 /* 2208 * without hierarchical coding code_rate_LP is irrelevant, 2209 * so we tolerate the otherwise invalid FEC_NONE setting 2210 */ 2211 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE) 2212 c->code_rate_LP = FEC_AUTO; 2213 2214 /* get frontend-specific tuning settings */ 2215 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); 2216 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { 2217 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; 2218 fepriv->max_drift = fetunesettings.max_drift; 2219 fepriv->step_size = fetunesettings.step_size; 2220 } else { 2221 /* default values */ 2222 switch (c->delivery_system) { 2223 case SYS_DVBS: 2224 case SYS_DVBS2: 2225 case SYS_ISDBS: 2226 case SYS_TURBO: 2227 case SYS_DVBC_ANNEX_A: 2228 case SYS_DVBC_ANNEX_C: 2229 fepriv->min_delay = HZ / 20; 2230 fepriv->step_size = c->symbol_rate / 16000; 2231 fepriv->max_drift = c->symbol_rate / 2000; 2232 break; 2233 case SYS_DVBT: 2234 case SYS_DVBT2: 2235 case SYS_ISDBT: 2236 case SYS_DTMB: 2237 fepriv->min_delay = HZ / 20; 2238 fepriv->step_size = fe->ops.info.frequency_stepsize * 2; 2239 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; 2240 break; 2241 default: 2242 /* 2243 * FIXME: This sounds wrong! if freqency_stepsize is 2244 * defined by the frontend, why not use it??? 2245 */ 2246 fepriv->min_delay = HZ / 20; 2247 fepriv->step_size = 0; /* no zigzag */ 2248 fepriv->max_drift = 0; 2249 break; 2250 } 2251 } 2252 if (dvb_override_tune_delay > 0) 2253 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; 2254 2255 fepriv->state = FESTATE_RETUNE; 2256 2257 /* Request the search algorithm to search */ 2258 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 2259 2260 dvb_frontend_clear_events(fe); 2261 dvb_frontend_add_event(fe, 0); 2262 dvb_frontend_wakeup(fe); 2263 fepriv->status = 0; 2264 2265 return 0; 2266 } 2267 2268 2269 static int dvb_frontend_handle_ioctl(struct file *file, 2270 unsigned int cmd, void *parg) 2271 { 2272 struct dvb_device *dvbdev = file->private_data; 2273 struct dvb_frontend *fe = dvbdev->priv; 2274 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2275 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2276 int i, err = -ENOTSUPP; 2277 2278 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2279 2280 switch (cmd) { 2281 case FE_SET_PROPERTY: { 2282 struct dtv_properties *tvps = parg; 2283 struct dtv_property *tvp = NULL; 2284 2285 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", 2286 __func__, tvps->num); 2287 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", 2288 __func__, tvps->props); 2289 2290 /* 2291 * Put an arbitrary limit on the number of messages that can 2292 * be sent at once 2293 */ 2294 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2295 return -EINVAL; 2296 2297 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp)); 2298 if (IS_ERR(tvp)) 2299 return PTR_ERR(tvp); 2300 2301 for (i = 0; i < tvps->num; i++) { 2302 err = dtv_property_process_set(fe, file, 2303 (tvp + i)->cmd, 2304 (tvp + i)->u.data); 2305 if (err < 0) { 2306 kfree(tvp); 2307 return err; 2308 } 2309 } 2310 kfree(tvp); 2311 err = 0; 2312 break; 2313 } 2314 case FE_GET_PROPERTY: { 2315 struct dtv_properties *tvps = parg; 2316 struct dtv_property *tvp = NULL; 2317 struct dtv_frontend_properties getp = fe->dtv_property_cache; 2318 2319 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", 2320 __func__, tvps->num); 2321 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", 2322 __func__, tvps->props); 2323 2324 /* 2325 * Put an arbitrary limit on the number of messages that can 2326 * be sent at once 2327 */ 2328 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS)) 2329 return -EINVAL; 2330 2331 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp)); 2332 if (IS_ERR(tvp)) 2333 return PTR_ERR(tvp); 2334 2335 /* 2336 * Let's use our own copy of property cache, in order to 2337 * avoid mangling with DTV zigzag logic, as drivers might 2338 * return crap, if they don't check if the data is available 2339 * before updating the properties cache. 2340 */ 2341 if (fepriv->state != FESTATE_IDLE) { 2342 err = dtv_get_frontend(fe, &getp, NULL); 2343 if (err < 0) { 2344 kfree(tvp); 2345 return err; 2346 } 2347 } 2348 for (i = 0; i < tvps->num; i++) { 2349 err = dtv_property_process_get(fe, &getp, 2350 tvp + i, file); 2351 if (err < 0) { 2352 kfree(tvp); 2353 return err; 2354 } 2355 } 2356 2357 if (copy_to_user((void __user *)tvps->props, tvp, 2358 tvps->num * sizeof(struct dtv_property))) { 2359 kfree(tvp); 2360 return -EFAULT; 2361 } 2362 kfree(tvp); 2363 err = 0; 2364 break; 2365 } 2366 2367 case FE_GET_INFO: { 2368 struct dvb_frontend_info* info = parg; 2369 2370 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); 2371 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max); 2372 2373 /* 2374 * Associate the 4 delivery systems supported by DVBv3 2375 * API with their DVBv5 counterpart. For the other standards, 2376 * use the closest type, assuming that it would hopefully 2377 * work with a DVBv3 application. 2378 * It should be noticed that, on multi-frontend devices with 2379 * different types (terrestrial and cable, for example), 2380 * a pure DVBv3 application won't be able to use all delivery 2381 * systems. Yet, changing the DVBv5 cache to the other delivery 2382 * system should be enough for making it work. 2383 */ 2384 switch (dvbv3_type(c->delivery_system)) { 2385 case DVBV3_QPSK: 2386 info->type = FE_QPSK; 2387 break; 2388 case DVBV3_ATSC: 2389 info->type = FE_ATSC; 2390 break; 2391 case DVBV3_QAM: 2392 info->type = FE_QAM; 2393 break; 2394 case DVBV3_OFDM: 2395 info->type = FE_OFDM; 2396 break; 2397 default: 2398 dev_err(fe->dvb->device, 2399 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 2400 __func__, c->delivery_system); 2401 fe->ops.info.type = FE_OFDM; 2402 } 2403 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n", 2404 __func__, c->delivery_system, fe->ops.info.type); 2405 2406 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */ 2407 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) 2408 info->caps |= FE_CAN_INVERSION_AUTO; 2409 err = 0; 2410 break; 2411 } 2412 2413 case FE_READ_STATUS: { 2414 enum fe_status *status = parg; 2415 2416 /* if retune was requested but hasn't occurred yet, prevent 2417 * that user get signal state from previous tuning */ 2418 if (fepriv->state == FESTATE_RETUNE || 2419 fepriv->state == FESTATE_ERROR) { 2420 err=0; 2421 *status = 0; 2422 break; 2423 } 2424 2425 if (fe->ops.read_status) 2426 err = fe->ops.read_status(fe, status); 2427 break; 2428 } 2429 2430 case FE_DISEQC_RESET_OVERLOAD: 2431 if (fe->ops.diseqc_reset_overload) { 2432 err = fe->ops.diseqc_reset_overload(fe); 2433 fepriv->state = FESTATE_DISEQC; 2434 fepriv->status = 0; 2435 } 2436 break; 2437 2438 case FE_DISEQC_SEND_MASTER_CMD: 2439 if (fe->ops.diseqc_send_master_cmd) { 2440 struct dvb_diseqc_master_cmd *cmd = parg; 2441 2442 if (cmd->msg_len > sizeof(cmd->msg)) { 2443 err = -EINVAL; 2444 break; 2445 } 2446 err = fe->ops.diseqc_send_master_cmd(fe, cmd); 2447 fepriv->state = FESTATE_DISEQC; 2448 fepriv->status = 0; 2449 } 2450 break; 2451 2452 case FE_DISEQC_SEND_BURST: 2453 if (fe->ops.diseqc_send_burst) { 2454 err = fe->ops.diseqc_send_burst(fe, 2455 (enum fe_sec_mini_cmd)parg); 2456 fepriv->state = FESTATE_DISEQC; 2457 fepriv->status = 0; 2458 } 2459 break; 2460 2461 case FE_SET_TONE: 2462 if (fe->ops.set_tone) { 2463 err = fe->ops.set_tone(fe, 2464 (enum fe_sec_tone_mode)parg); 2465 fepriv->tone = (enum fe_sec_tone_mode)parg; 2466 fepriv->state = FESTATE_DISEQC; 2467 fepriv->status = 0; 2468 } 2469 break; 2470 2471 case FE_SET_VOLTAGE: 2472 if (fe->ops.set_voltage) { 2473 err = fe->ops.set_voltage(fe, 2474 (enum fe_sec_voltage)parg); 2475 fepriv->voltage = (enum fe_sec_voltage)parg; 2476 fepriv->state = FESTATE_DISEQC; 2477 fepriv->status = 0; 2478 } 2479 break; 2480 2481 case FE_DISEQC_RECV_SLAVE_REPLY: 2482 if (fe->ops.diseqc_recv_slave_reply) 2483 err = fe->ops.diseqc_recv_slave_reply(fe, parg); 2484 break; 2485 2486 case FE_ENABLE_HIGH_LNB_VOLTAGE: 2487 if (fe->ops.enable_high_lnb_voltage) 2488 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); 2489 break; 2490 2491 case FE_SET_FRONTEND_TUNE_MODE: 2492 fepriv->tune_mode_flags = (unsigned long) parg; 2493 err = 0; 2494 break; 2495 2496 /* DEPRECATED dish control ioctls */ 2497 2498 case FE_DISHNETWORK_SEND_LEGACY_CMD: 2499 if (fe->ops.dishnetwork_send_legacy_command) { 2500 err = fe->ops.dishnetwork_send_legacy_command(fe, 2501 (unsigned long)parg); 2502 fepriv->state = FESTATE_DISEQC; 2503 fepriv->status = 0; 2504 } else if (fe->ops.set_voltage) { 2505 /* 2506 * NOTE: This is a fallback condition. Some frontends 2507 * (stv0299 for instance) take longer than 8msec to 2508 * respond to a set_voltage command. Those switches 2509 * need custom routines to switch properly. For all 2510 * other frontends, the following should work ok. 2511 * Dish network legacy switches (as used by Dish500) 2512 * are controlled by sending 9-bit command words 2513 * spaced 8msec apart. 2514 * the actual command word is switch/port dependent 2515 * so it is up to the userspace application to send 2516 * the right command. 2517 * The command must always start with a '0' after 2518 * initialization, so parg is 8 bits and does not 2519 * include the initialization or start bit 2520 */ 2521 unsigned long swcmd = ((unsigned long) parg) << 1; 2522 ktime_t nexttime; 2523 ktime_t tv[10]; 2524 int i; 2525 u8 last = 1; 2526 if (dvb_frontend_debug) 2527 dprintk("%s switch command: 0x%04lx\n", 2528 __func__, swcmd); 2529 nexttime = ktime_get_boottime(); 2530 if (dvb_frontend_debug) 2531 tv[0] = nexttime; 2532 /* before sending a command, initialize by sending 2533 * a 32ms 18V to the switch 2534 */ 2535 fe->ops.set_voltage(fe, SEC_VOLTAGE_18); 2536 dvb_frontend_sleep_until(&nexttime, 32000); 2537 2538 for (i = 0; i < 9; i++) { 2539 if (dvb_frontend_debug) 2540 tv[i+1] = ktime_get_boottime(); 2541 if ((swcmd & 0x01) != last) { 2542 /* set voltage to (last ? 13V : 18V) */ 2543 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); 2544 last = (last) ? 0 : 1; 2545 } 2546 swcmd = swcmd >> 1; 2547 if (i != 8) 2548 dvb_frontend_sleep_until(&nexttime, 8000); 2549 } 2550 if (dvb_frontend_debug) { 2551 dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n", 2552 __func__, fe->dvb->num); 2553 for (i = 1; i < 10; i++) 2554 pr_info("%d: %d\n", i, 2555 (int) ktime_us_delta(tv[i], tv[i-1])); 2556 } 2557 err = 0; 2558 fepriv->state = FESTATE_DISEQC; 2559 fepriv->status = 0; 2560 } 2561 break; 2562 2563 /* DEPRECATED statistics ioctls */ 2564 2565 case FE_READ_BER: 2566 if (fe->ops.read_ber) { 2567 if (fepriv->thread) 2568 err = fe->ops.read_ber(fe, parg); 2569 else 2570 err = -EAGAIN; 2571 } 2572 break; 2573 2574 case FE_READ_SIGNAL_STRENGTH: 2575 if (fe->ops.read_signal_strength) { 2576 if (fepriv->thread) 2577 err = fe->ops.read_signal_strength(fe, parg); 2578 else 2579 err = -EAGAIN; 2580 } 2581 break; 2582 2583 case FE_READ_SNR: 2584 if (fe->ops.read_snr) { 2585 if (fepriv->thread) 2586 err = fe->ops.read_snr(fe, parg); 2587 else 2588 err = -EAGAIN; 2589 } 2590 break; 2591 2592 case FE_READ_UNCORRECTED_BLOCKS: 2593 if (fe->ops.read_ucblocks) { 2594 if (fepriv->thread) 2595 err = fe->ops.read_ucblocks(fe, parg); 2596 else 2597 err = -EAGAIN; 2598 } 2599 break; 2600 2601 /* DEPRECATED DVBv3 ioctls */ 2602 2603 case FE_SET_FRONTEND: 2604 err = dvbv3_set_delivery_system(fe); 2605 if (err) 2606 break; 2607 2608 err = dtv_property_cache_sync(fe, c, parg); 2609 if (err) 2610 break; 2611 err = dtv_set_frontend(fe); 2612 break; 2613 case FE_GET_EVENT: 2614 err = dvb_frontend_get_event (fe, parg, file->f_flags); 2615 break; 2616 2617 case FE_GET_FRONTEND: { 2618 struct dtv_frontend_properties getp = fe->dtv_property_cache; 2619 2620 /* 2621 * Let's use our own copy of property cache, in order to 2622 * avoid mangling with DTV zigzag logic, as drivers might 2623 * return crap, if they don't check if the data is available 2624 * before updating the properties cache. 2625 */ 2626 err = dtv_get_frontend(fe, &getp, parg); 2627 break; 2628 } 2629 2630 default: 2631 return -ENOTSUPP; 2632 } /* switch */ 2633 2634 return err; 2635 } 2636 2637 2638 static __poll_t dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) 2639 { 2640 struct dvb_device *dvbdev = file->private_data; 2641 struct dvb_frontend *fe = dvbdev->priv; 2642 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2643 2644 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__); 2645 2646 poll_wait (file, &fepriv->events.wait_queue, wait); 2647 2648 if (fepriv->events.eventw != fepriv->events.eventr) 2649 return (EPOLLIN | EPOLLRDNORM | EPOLLPRI); 2650 2651 return 0; 2652 } 2653 2654 static int dvb_frontend_open(struct inode *inode, struct file *file) 2655 { 2656 struct dvb_device *dvbdev = file->private_data; 2657 struct dvb_frontend *fe = dvbdev->priv; 2658 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2659 struct dvb_adapter *adapter = fe->dvb; 2660 int ret; 2661 2662 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2663 if (fe->exit == DVB_FE_DEVICE_REMOVED) 2664 return -ENODEV; 2665 2666 if (adapter->mfe_shared) { 2667 mutex_lock (&adapter->mfe_lock); 2668 2669 if (adapter->mfe_dvbdev == NULL) 2670 adapter->mfe_dvbdev = dvbdev; 2671 2672 else if (adapter->mfe_dvbdev != dvbdev) { 2673 struct dvb_device 2674 *mfedev = adapter->mfe_dvbdev; 2675 struct dvb_frontend 2676 *mfe = mfedev->priv; 2677 struct dvb_frontend_private 2678 *mfepriv = mfe->frontend_priv; 2679 int mferetry = (dvb_mfe_wait_time << 1); 2680 2681 mutex_unlock (&adapter->mfe_lock); 2682 while (mferetry-- && (mfedev->users != -1 || 2683 mfepriv->thread != NULL)) { 2684 if(msleep_interruptible(500)) { 2685 if(signal_pending(current)) 2686 return -EINTR; 2687 } 2688 } 2689 2690 mutex_lock (&adapter->mfe_lock); 2691 if(adapter->mfe_dvbdev != dvbdev) { 2692 mfedev = adapter->mfe_dvbdev; 2693 mfe = mfedev->priv; 2694 mfepriv = mfe->frontend_priv; 2695 if (mfedev->users != -1 || 2696 mfepriv->thread != NULL) { 2697 mutex_unlock (&adapter->mfe_lock); 2698 return -EBUSY; 2699 } 2700 adapter->mfe_dvbdev = dvbdev; 2701 } 2702 } 2703 } 2704 2705 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { 2706 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) 2707 goto err0; 2708 2709 /* If we took control of the bus, we need to force 2710 reinitialization. This is because many ts_bus_ctrl() 2711 functions strobe the RESET pin on the demod, and if the 2712 frontend thread already exists then the dvb_init() routine 2713 won't get called (which is what usually does initial 2714 register configuration). */ 2715 fepriv->reinitialise = 1; 2716 } 2717 2718 if ((ret = dvb_generic_open (inode, file)) < 0) 2719 goto err1; 2720 2721 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2722 /* normal tune mode when opened R/W */ 2723 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; 2724 fepriv->tone = -1; 2725 fepriv->voltage = -1; 2726 2727 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 2728 if (fe->dvb->mdev) { 2729 mutex_lock(&fe->dvb->mdev->graph_mutex); 2730 if (fe->dvb->mdev->enable_source) 2731 ret = fe->dvb->mdev->enable_source( 2732 dvbdev->entity, 2733 &fepriv->pipe); 2734 mutex_unlock(&fe->dvb->mdev->graph_mutex); 2735 if (ret) { 2736 dev_err(fe->dvb->device, 2737 "Tuner is busy. Error %d\n", ret); 2738 goto err2; 2739 } 2740 } 2741 #endif 2742 ret = dvb_frontend_start (fe); 2743 if (ret) 2744 goto err3; 2745 2746 /* empty event queue */ 2747 fepriv->events.eventr = fepriv->events.eventw = 0; 2748 } 2749 2750 dvb_frontend_get(fe); 2751 2752 if (adapter->mfe_shared) 2753 mutex_unlock (&adapter->mfe_lock); 2754 return ret; 2755 2756 err3: 2757 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 2758 if (fe->dvb->mdev) { 2759 mutex_lock(&fe->dvb->mdev->graph_mutex); 2760 if (fe->dvb->mdev->disable_source) 2761 fe->dvb->mdev->disable_source(dvbdev->entity); 2762 mutex_unlock(&fe->dvb->mdev->graph_mutex); 2763 } 2764 err2: 2765 #endif 2766 dvb_generic_release(inode, file); 2767 err1: 2768 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) 2769 fe->ops.ts_bus_ctrl(fe, 0); 2770 err0: 2771 if (adapter->mfe_shared) 2772 mutex_unlock (&adapter->mfe_lock); 2773 return ret; 2774 } 2775 2776 static int dvb_frontend_release(struct inode *inode, struct file *file) 2777 { 2778 struct dvb_device *dvbdev = file->private_data; 2779 struct dvb_frontend *fe = dvbdev->priv; 2780 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2781 int ret; 2782 2783 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2784 2785 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2786 fepriv->release_jiffies = jiffies; 2787 mb(); 2788 } 2789 2790 ret = dvb_generic_release (inode, file); 2791 2792 if (dvbdev->users == -1) { 2793 wake_up(&fepriv->wait_queue); 2794 #ifdef CONFIG_MEDIA_CONTROLLER_DVB 2795 if (fe->dvb->mdev) { 2796 mutex_lock(&fe->dvb->mdev->graph_mutex); 2797 if (fe->dvb->mdev->disable_source) 2798 fe->dvb->mdev->disable_source(dvbdev->entity); 2799 mutex_unlock(&fe->dvb->mdev->graph_mutex); 2800 } 2801 #endif 2802 if (fe->exit != DVB_FE_NO_EXIT) 2803 wake_up(&dvbdev->wait_queue); 2804 if (fe->ops.ts_bus_ctrl) 2805 fe->ops.ts_bus_ctrl(fe, 0); 2806 } 2807 2808 dvb_frontend_put(fe); 2809 2810 return ret; 2811 } 2812 2813 static const struct file_operations dvb_frontend_fops = { 2814 .owner = THIS_MODULE, 2815 .unlocked_ioctl = dvb_frontend_ioctl, 2816 #ifdef CONFIG_COMPAT 2817 .compat_ioctl = dvb_frontend_compat_ioctl, 2818 #endif 2819 .poll = dvb_frontend_poll, 2820 .open = dvb_frontend_open, 2821 .release = dvb_frontend_release, 2822 .llseek = noop_llseek, 2823 }; 2824 2825 int dvb_frontend_suspend(struct dvb_frontend *fe) 2826 { 2827 int ret = 0; 2828 2829 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2830 fe->id); 2831 2832 if (fe->ops.tuner_ops.suspend) 2833 ret = fe->ops.tuner_ops.suspend(fe); 2834 else if (fe->ops.tuner_ops.sleep) 2835 ret = fe->ops.tuner_ops.sleep(fe); 2836 2837 if (fe->ops.sleep) 2838 ret = fe->ops.sleep(fe); 2839 2840 return ret; 2841 } 2842 EXPORT_SYMBOL(dvb_frontend_suspend); 2843 2844 int dvb_frontend_resume(struct dvb_frontend *fe) 2845 { 2846 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2847 int ret = 0; 2848 2849 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2850 fe->id); 2851 2852 fe->exit = DVB_FE_DEVICE_RESUME; 2853 if (fe->ops.init) 2854 ret = fe->ops.init(fe); 2855 2856 if (fe->ops.tuner_ops.resume) 2857 ret = fe->ops.tuner_ops.resume(fe); 2858 else if (fe->ops.tuner_ops.init) 2859 ret = fe->ops.tuner_ops.init(fe); 2860 2861 if (fe->ops.set_tone && fepriv->tone != -1) 2862 fe->ops.set_tone(fe, fepriv->tone); 2863 if (fe->ops.set_voltage && fepriv->voltage != -1) 2864 fe->ops.set_voltage(fe, fepriv->voltage); 2865 2866 fe->exit = DVB_FE_NO_EXIT; 2867 fepriv->state = FESTATE_RETUNE; 2868 dvb_frontend_wakeup(fe); 2869 2870 return ret; 2871 } 2872 EXPORT_SYMBOL(dvb_frontend_resume); 2873 2874 int dvb_register_frontend(struct dvb_adapter* dvb, 2875 struct dvb_frontend* fe) 2876 { 2877 struct dvb_frontend_private *fepriv; 2878 const struct dvb_device dvbdev_template = { 2879 .users = ~0, 2880 .writers = 1, 2881 .readers = (~0)-1, 2882 .fops = &dvb_frontend_fops, 2883 #if defined(CONFIG_MEDIA_CONTROLLER_DVB) 2884 .name = fe->ops.info.name, 2885 #endif 2886 }; 2887 2888 dev_dbg(dvb->device, "%s:\n", __func__); 2889 2890 if (mutex_lock_interruptible(&frontend_mutex)) 2891 return -ERESTARTSYS; 2892 2893 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); 2894 if (fe->frontend_priv == NULL) { 2895 mutex_unlock(&frontend_mutex); 2896 return -ENOMEM; 2897 } 2898 fepriv = fe->frontend_priv; 2899 2900 kref_init(&fe->refcount); 2901 2902 /* 2903 * After initialization, there need to be two references: one 2904 * for dvb_unregister_frontend(), and another one for 2905 * dvb_frontend_detach(). 2906 */ 2907 dvb_frontend_get(fe); 2908 2909 sema_init(&fepriv->sem, 1); 2910 init_waitqueue_head (&fepriv->wait_queue); 2911 init_waitqueue_head (&fepriv->events.wait_queue); 2912 mutex_init(&fepriv->events.mtx); 2913 fe->dvb = dvb; 2914 fepriv->inversion = INVERSION_OFF; 2915 2916 dev_info(fe->dvb->device, 2917 "DVB: registering adapter %i frontend %i (%s)...\n", 2918 fe->dvb->num, fe->id, fe->ops.info.name); 2919 2920 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, 2921 fe, DVB_DEVICE_FRONTEND, 0); 2922 2923 /* 2924 * Initialize the cache to the proper values according with the 2925 * first supported delivery system (ops->delsys[0]) 2926 */ 2927 2928 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0]; 2929 dvb_frontend_clear_cache(fe); 2930 2931 mutex_unlock(&frontend_mutex); 2932 return 0; 2933 } 2934 EXPORT_SYMBOL(dvb_register_frontend); 2935 2936 int dvb_unregister_frontend(struct dvb_frontend* fe) 2937 { 2938 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2939 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2940 2941 mutex_lock(&frontend_mutex); 2942 dvb_frontend_stop(fe); 2943 dvb_remove_device(fepriv->dvbdev); 2944 2945 /* fe is invalid now */ 2946 mutex_unlock(&frontend_mutex); 2947 dvb_frontend_put(fe); 2948 return 0; 2949 } 2950 EXPORT_SYMBOL(dvb_unregister_frontend); 2951 2952 static void dvb_frontend_invoke_release(struct dvb_frontend *fe, 2953 void (*release)(struct dvb_frontend *fe)) 2954 { 2955 if (release) { 2956 release(fe); 2957 #ifdef CONFIG_MEDIA_ATTACH 2958 dvb_detach(release); 2959 #endif 2960 } 2961 } 2962 2963 void dvb_frontend_detach(struct dvb_frontend* fe) 2964 { 2965 dvb_frontend_invoke_release(fe, fe->ops.release_sec); 2966 dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release); 2967 dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release); 2968 dvb_frontend_invoke_release(fe, fe->ops.detach); 2969 dvb_frontend_put(fe); 2970 } 2971 EXPORT_SYMBOL(dvb_frontend_detach); 2972