1 /* 2 * dvb_frontend.c: DVB frontend tuning interface/thread 3 * 4 * 5 * Copyright (C) 1999-2001 Ralph Metzler 6 * Marcus Metzler 7 * Holger Waechtler 8 * for convergence integrated media GmbH 9 * 10 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup) 11 * 12 * This program is free software; you can redistribute it and/or 13 * modify it under the terms of the GNU General Public License 14 * as published by the Free Software Foundation; either version 2 15 * of the License, or (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 25 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html 26 */ 27 28 /* Enables DVBv3 compatibility bits at the headers */ 29 #define __DVB_CORE__ 30 31 #include <linux/string.h> 32 #include <linux/kernel.h> 33 #include <linux/sched.h> 34 #include <linux/wait.h> 35 #include <linux/slab.h> 36 #include <linux/poll.h> 37 #include <linux/semaphore.h> 38 #include <linux/module.h> 39 #include <linux/list.h> 40 #include <linux/freezer.h> 41 #include <linux/jiffies.h> 42 #include <linux/kthread.h> 43 #include <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 FESTATE_IDLE 1 70 #define FESTATE_RETUNE 2 71 #define FESTATE_TUNING_FAST 4 72 #define FESTATE_TUNING_SLOW 8 73 #define FESTATE_TUNED 16 74 #define FESTATE_ZIGZAG_FAST 32 75 #define FESTATE_ZIGZAG_SLOW 64 76 #define FESTATE_DISEQC 128 77 #define FESTATE_ERROR 256 78 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) 79 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) 80 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) 81 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) 82 83 #define FE_ALGO_HW 1 84 /* 85 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. 86 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. 87 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. 88 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. 89 * FESTATE_TUNED. The frontend has successfully locked on. 90 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. 91 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. 92 * FESTATE_DISEQC. A DISEQC command has just been issued. 93 * FESTATE_WAITFORLOCK. When we're waiting for a lock. 94 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. 95 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. 96 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. 97 */ 98 99 static DEFINE_MUTEX(frontend_mutex); 100 101 struct dvb_frontend_private { 102 103 /* thread/frontend values */ 104 struct dvb_device *dvbdev; 105 struct dvb_frontend_parameters parameters_out; 106 struct dvb_fe_events events; 107 struct semaphore sem; 108 struct list_head list_head; 109 wait_queue_head_t wait_queue; 110 struct task_struct *thread; 111 unsigned long release_jiffies; 112 unsigned int wakeup; 113 fe_status_t status; 114 unsigned long tune_mode_flags; 115 unsigned int delay; 116 unsigned int reinitialise; 117 int tone; 118 int voltage; 119 120 /* swzigzag values */ 121 unsigned int state; 122 unsigned int bending; 123 int lnb_drift; 124 unsigned int inversion; 125 unsigned int auto_step; 126 unsigned int auto_sub_step; 127 unsigned int started_auto_step; 128 unsigned int min_delay; 129 unsigned int max_drift; 130 unsigned int step_size; 131 int quality; 132 unsigned int check_wrapped; 133 enum dvbfe_search algo_status; 134 }; 135 136 static void dvb_frontend_wakeup(struct dvb_frontend *fe); 137 static int dtv_get_frontend(struct dvb_frontend *fe, 138 struct dvb_frontend_parameters *p_out); 139 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, 140 struct dvb_frontend_parameters *p); 141 142 static bool has_get_frontend(struct dvb_frontend *fe) 143 { 144 return fe->ops.get_frontend != NULL; 145 } 146 147 /* 148 * Due to DVBv3 API calls, a delivery system should be mapped into one of 149 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC), 150 * otherwise, a DVBv3 call will fail. 151 */ 152 enum dvbv3_emulation_type { 153 DVBV3_UNKNOWN, 154 DVBV3_QPSK, 155 DVBV3_QAM, 156 DVBV3_OFDM, 157 DVBV3_ATSC, 158 }; 159 160 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system) 161 { 162 switch (delivery_system) { 163 case SYS_DVBC_ANNEX_A: 164 case SYS_DVBC_ANNEX_C: 165 return DVBV3_QAM; 166 case SYS_DVBS: 167 case SYS_DVBS2: 168 case SYS_TURBO: 169 case SYS_ISDBS: 170 case SYS_DSS: 171 return DVBV3_QPSK; 172 case SYS_DVBT: 173 case SYS_DVBT2: 174 case SYS_ISDBT: 175 case SYS_DTMB: 176 return DVBV3_OFDM; 177 case SYS_ATSC: 178 case SYS_ATSCMH: 179 case SYS_DVBC_ANNEX_B: 180 return DVBV3_ATSC; 181 case SYS_UNDEFINED: 182 case SYS_ISDBC: 183 case SYS_DVBH: 184 case SYS_DAB: 185 default: 186 /* 187 * Doesn't know how to emulate those types and/or 188 * there's no frontend driver from this type yet 189 * with some emulation code, so, we're not sure yet how 190 * to handle them, or they're not compatible with a DVBv3 call. 191 */ 192 return DVBV3_UNKNOWN; 193 } 194 } 195 196 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) 197 { 198 struct dvb_frontend_private *fepriv = fe->frontend_priv; 199 struct dvb_fe_events *events = &fepriv->events; 200 struct dvb_frontend_event *e; 201 int wp; 202 203 dev_dbg(fe->dvb->device, "%s:\n", __func__); 204 205 if ((status & FE_HAS_LOCK) && has_get_frontend(fe)) 206 dtv_get_frontend(fe, &fepriv->parameters_out); 207 208 mutex_lock(&events->mtx); 209 210 wp = (events->eventw + 1) % MAX_EVENT; 211 if (wp == events->eventr) { 212 events->overflow = 1; 213 events->eventr = (events->eventr + 1) % MAX_EVENT; 214 } 215 216 e = &events->events[events->eventw]; 217 e->status = status; 218 e->parameters = fepriv->parameters_out; 219 220 events->eventw = wp; 221 222 mutex_unlock(&events->mtx); 223 224 wake_up_interruptible (&events->wait_queue); 225 } 226 227 static int dvb_frontend_get_event(struct dvb_frontend *fe, 228 struct dvb_frontend_event *event, int flags) 229 { 230 struct dvb_frontend_private *fepriv = fe->frontend_priv; 231 struct dvb_fe_events *events = &fepriv->events; 232 233 dev_dbg(fe->dvb->device, "%s:\n", __func__); 234 235 if (events->overflow) { 236 events->overflow = 0; 237 return -EOVERFLOW; 238 } 239 240 if (events->eventw == events->eventr) { 241 int ret; 242 243 if (flags & O_NONBLOCK) 244 return -EWOULDBLOCK; 245 246 up(&fepriv->sem); 247 248 ret = wait_event_interruptible (events->wait_queue, 249 events->eventw != events->eventr); 250 251 if (down_interruptible (&fepriv->sem)) 252 return -ERESTARTSYS; 253 254 if (ret < 0) 255 return ret; 256 } 257 258 mutex_lock(&events->mtx); 259 *event = events->events[events->eventr]; 260 events->eventr = (events->eventr + 1) % MAX_EVENT; 261 mutex_unlock(&events->mtx); 262 263 return 0; 264 } 265 266 static void dvb_frontend_clear_events(struct dvb_frontend *fe) 267 { 268 struct dvb_frontend_private *fepriv = fe->frontend_priv; 269 struct dvb_fe_events *events = &fepriv->events; 270 271 mutex_lock(&events->mtx); 272 events->eventr = events->eventw; 273 mutex_unlock(&events->mtx); 274 } 275 276 static void dvb_frontend_init(struct dvb_frontend *fe) 277 { 278 dev_dbg(fe->dvb->device, 279 "%s: initialising adapter %i frontend %i (%s)...\n", 280 __func__, fe->dvb->num, fe->id, fe->ops.info.name); 281 282 if (fe->ops.init) 283 fe->ops.init(fe); 284 if (fe->ops.tuner_ops.init) { 285 if (fe->ops.i2c_gate_ctrl) 286 fe->ops.i2c_gate_ctrl(fe, 1); 287 fe->ops.tuner_ops.init(fe); 288 if (fe->ops.i2c_gate_ctrl) 289 fe->ops.i2c_gate_ctrl(fe, 0); 290 } 291 } 292 293 void dvb_frontend_reinitialise(struct dvb_frontend *fe) 294 { 295 struct dvb_frontend_private *fepriv = fe->frontend_priv; 296 297 fepriv->reinitialise = 1; 298 dvb_frontend_wakeup(fe); 299 } 300 EXPORT_SYMBOL(dvb_frontend_reinitialise); 301 302 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) 303 { 304 int q2; 305 struct dvb_frontend *fe = fepriv->dvbdev->priv; 306 307 dev_dbg(fe->dvb->device, "%s:\n", __func__); 308 309 if (locked) 310 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; 311 else 312 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; 313 314 q2 = fepriv->quality - 128; 315 q2 *= q2; 316 317 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); 318 } 319 320 /** 321 * Performs automatic twiddling of frontend parameters. 322 * 323 * @param fe The frontend concerned. 324 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT 325 * @returns Number of complete iterations that have been performed. 326 */ 327 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) 328 { 329 int autoinversion; 330 int ready = 0; 331 int fe_set_err = 0; 332 struct dvb_frontend_private *fepriv = fe->frontend_priv; 333 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 334 int original_inversion = c->inversion; 335 u32 original_frequency = c->frequency; 336 337 /* are we using autoinversion? */ 338 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 339 (c->inversion == INVERSION_AUTO)); 340 341 /* setup parameters correctly */ 342 while(!ready) { 343 /* calculate the lnb_drift */ 344 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; 345 346 /* wrap the auto_step if we've exceeded the maximum drift */ 347 if (fepriv->lnb_drift > fepriv->max_drift) { 348 fepriv->auto_step = 0; 349 fepriv->auto_sub_step = 0; 350 fepriv->lnb_drift = 0; 351 } 352 353 /* perform inversion and +/- zigzag */ 354 switch(fepriv->auto_sub_step) { 355 case 0: 356 /* try with the current inversion and current drift setting */ 357 ready = 1; 358 break; 359 360 case 1: 361 if (!autoinversion) break; 362 363 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 364 ready = 1; 365 break; 366 367 case 2: 368 if (fepriv->lnb_drift == 0) break; 369 370 fepriv->lnb_drift = -fepriv->lnb_drift; 371 ready = 1; 372 break; 373 374 case 3: 375 if (fepriv->lnb_drift == 0) break; 376 if (!autoinversion) break; 377 378 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 379 fepriv->lnb_drift = -fepriv->lnb_drift; 380 ready = 1; 381 break; 382 383 default: 384 fepriv->auto_step++; 385 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ 386 break; 387 } 388 389 if (!ready) fepriv->auto_sub_step++; 390 } 391 392 /* if this attempt would hit where we started, indicate a complete 393 * iteration has occurred */ 394 if ((fepriv->auto_step == fepriv->started_auto_step) && 395 (fepriv->auto_sub_step == 0) && check_wrapped) { 396 return 1; 397 } 398 399 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \ 400 "auto_sub_step:%i started_auto_step:%i\n", 401 __func__, fepriv->lnb_drift, fepriv->inversion, 402 fepriv->auto_step, fepriv->auto_sub_step, 403 fepriv->started_auto_step); 404 405 /* set the frontend itself */ 406 c->frequency += fepriv->lnb_drift; 407 if (autoinversion) 408 c->inversion = fepriv->inversion; 409 tmp = *c; 410 if (fe->ops.set_frontend) 411 fe_set_err = fe->ops.set_frontend(fe); 412 *c = tmp; 413 if (fe_set_err < 0) { 414 fepriv->state = FESTATE_ERROR; 415 return fe_set_err; 416 } 417 418 c->frequency = original_frequency; 419 c->inversion = original_inversion; 420 421 fepriv->auto_sub_step++; 422 return 0; 423 } 424 425 static void dvb_frontend_swzigzag(struct dvb_frontend *fe) 426 { 427 fe_status_t s = 0; 428 int retval = 0; 429 struct dvb_frontend_private *fepriv = fe->frontend_priv; 430 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 431 432 /* if we've got no parameters, just keep idling */ 433 if (fepriv->state & FESTATE_IDLE) { 434 fepriv->delay = 3*HZ; 435 fepriv->quality = 0; 436 return; 437 } 438 439 /* in SCAN mode, we just set the frontend when asked and leave it alone */ 440 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { 441 if (fepriv->state & FESTATE_RETUNE) { 442 tmp = *c; 443 if (fe->ops.set_frontend) 444 retval = fe->ops.set_frontend(fe); 445 *c = tmp; 446 if (retval < 0) 447 fepriv->state = FESTATE_ERROR; 448 else 449 fepriv->state = FESTATE_TUNED; 450 } 451 fepriv->delay = 3*HZ; 452 fepriv->quality = 0; 453 return; 454 } 455 456 /* get the frontend status */ 457 if (fepriv->state & FESTATE_RETUNE) { 458 s = 0; 459 } else { 460 if (fe->ops.read_status) 461 fe->ops.read_status(fe, &s); 462 if (s != fepriv->status) { 463 dvb_frontend_add_event(fe, s); 464 fepriv->status = s; 465 } 466 } 467 468 /* if we're not tuned, and we have a lock, move to the TUNED state */ 469 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { 470 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 471 fepriv->state = FESTATE_TUNED; 472 473 /* if we're tuned, then we have determined the correct inversion */ 474 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 475 (c->inversion == INVERSION_AUTO)) { 476 c->inversion = fepriv->inversion; 477 } 478 return; 479 } 480 481 /* if we are tuned already, check we're still locked */ 482 if (fepriv->state & FESTATE_TUNED) { 483 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 484 485 /* we're tuned, and the lock is still good... */ 486 if (s & FE_HAS_LOCK) { 487 return; 488 } else { /* if we _WERE_ tuned, but now don't have a lock */ 489 fepriv->state = FESTATE_ZIGZAG_FAST; 490 fepriv->started_auto_step = fepriv->auto_step; 491 fepriv->check_wrapped = 0; 492 } 493 } 494 495 /* don't actually do anything if we're in the LOSTLOCK state, 496 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ 497 if ((fepriv->state & FESTATE_LOSTLOCK) && 498 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { 499 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 500 return; 501 } 502 503 /* don't do anything if we're in the DISEQC state, since this 504 * might be someone with a motorized dish controlled by DISEQC. 505 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ 506 if (fepriv->state & FESTATE_DISEQC) { 507 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 508 return; 509 } 510 511 /* if we're in the RETUNE state, set everything up for a brand 512 * new scan, keeping the current inversion setting, as the next 513 * tune is _very_ likely to require the same */ 514 if (fepriv->state & FESTATE_RETUNE) { 515 fepriv->lnb_drift = 0; 516 fepriv->auto_step = 0; 517 fepriv->auto_sub_step = 0; 518 fepriv->started_auto_step = 0; 519 fepriv->check_wrapped = 0; 520 } 521 522 /* fast zigzag. */ 523 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { 524 fepriv->delay = fepriv->min_delay; 525 526 /* perform a tune */ 527 retval = dvb_frontend_swzigzag_autotune(fe, 528 fepriv->check_wrapped); 529 if (retval < 0) { 530 return; 531 } else if (retval) { 532 /* OK, if we've run out of trials at the fast speed. 533 * Drop back to slow for the _next_ attempt */ 534 fepriv->state = FESTATE_SEARCHING_SLOW; 535 fepriv->started_auto_step = fepriv->auto_step; 536 return; 537 } 538 fepriv->check_wrapped = 1; 539 540 /* if we've just retuned, enter the ZIGZAG_FAST state. 541 * This ensures we cannot return from an 542 * FE_SET_FRONTEND ioctl before the first frontend tune 543 * occurs */ 544 if (fepriv->state & FESTATE_RETUNE) { 545 fepriv->state = FESTATE_TUNING_FAST; 546 } 547 } 548 549 /* slow zigzag */ 550 if (fepriv->state & FESTATE_SEARCHING_SLOW) { 551 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 552 553 /* Note: don't bother checking for wrapping; we stay in this 554 * state until we get a lock */ 555 dvb_frontend_swzigzag_autotune(fe, 0); 556 } 557 } 558 559 static int dvb_frontend_is_exiting(struct dvb_frontend *fe) 560 { 561 struct dvb_frontend_private *fepriv = fe->frontend_priv; 562 563 if (fe->exit != DVB_FE_NO_EXIT) 564 return 1; 565 566 if (fepriv->dvbdev->writers == 1) 567 if (time_after_eq(jiffies, fepriv->release_jiffies + 568 dvb_shutdown_timeout * HZ)) 569 return 1; 570 571 return 0; 572 } 573 574 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) 575 { 576 struct dvb_frontend_private *fepriv = fe->frontend_priv; 577 578 if (fepriv->wakeup) { 579 fepriv->wakeup = 0; 580 return 1; 581 } 582 return dvb_frontend_is_exiting(fe); 583 } 584 585 static void dvb_frontend_wakeup(struct dvb_frontend *fe) 586 { 587 struct dvb_frontend_private *fepriv = fe->frontend_priv; 588 589 fepriv->wakeup = 1; 590 wake_up_interruptible(&fepriv->wait_queue); 591 } 592 593 static int dvb_frontend_thread(void *data) 594 { 595 struct dvb_frontend *fe = data; 596 struct dvb_frontend_private *fepriv = fe->frontend_priv; 597 fe_status_t s; 598 enum dvbfe_algo algo; 599 600 bool re_tune = false; 601 bool semheld = false; 602 603 dev_dbg(fe->dvb->device, "%s:\n", __func__); 604 605 fepriv->check_wrapped = 0; 606 fepriv->quality = 0; 607 fepriv->delay = 3*HZ; 608 fepriv->status = 0; 609 fepriv->wakeup = 0; 610 fepriv->reinitialise = 0; 611 612 dvb_frontend_init(fe); 613 614 set_freezable(); 615 while (1) { 616 up(&fepriv->sem); /* is locked when we enter the thread... */ 617 restart: 618 wait_event_interruptible_timeout(fepriv->wait_queue, 619 dvb_frontend_should_wakeup(fe) || kthread_should_stop() 620 || freezing(current), 621 fepriv->delay); 622 623 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { 624 /* got signal or quitting */ 625 if (!down_interruptible(&fepriv->sem)) 626 semheld = true; 627 fe->exit = DVB_FE_NORMAL_EXIT; 628 break; 629 } 630 631 if (try_to_freeze()) 632 goto restart; 633 634 if (down_interruptible(&fepriv->sem)) 635 break; 636 637 if (fepriv->reinitialise) { 638 dvb_frontend_init(fe); 639 if (fe->ops.set_tone && fepriv->tone != -1) 640 fe->ops.set_tone(fe, fepriv->tone); 641 if (fe->ops.set_voltage && fepriv->voltage != -1) 642 fe->ops.set_voltage(fe, fepriv->voltage); 643 fepriv->reinitialise = 0; 644 } 645 646 /* do an iteration of the tuning loop */ 647 if (fe->ops.get_frontend_algo) { 648 algo = fe->ops.get_frontend_algo(fe); 649 switch (algo) { 650 case DVBFE_ALGO_HW: 651 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); 652 653 if (fepriv->state & FESTATE_RETUNE) { 654 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__); 655 re_tune = true; 656 fepriv->state = FESTATE_TUNED; 657 } else { 658 re_tune = false; 659 } 660 661 if (fe->ops.tune) 662 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s); 663 664 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { 665 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__); 666 dvb_frontend_add_event(fe, s); 667 fepriv->status = s; 668 } 669 break; 670 case DVBFE_ALGO_SW: 671 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); 672 dvb_frontend_swzigzag(fe); 673 break; 674 case DVBFE_ALGO_CUSTOM: 675 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); 676 if (fepriv->state & FESTATE_RETUNE) { 677 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__); 678 fepriv->state = FESTATE_TUNED; 679 } 680 /* Case where we are going to search for a carrier 681 * User asked us to retune again for some reason, possibly 682 * requesting a search with a new set of parameters 683 */ 684 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { 685 if (fe->ops.search) { 686 fepriv->algo_status = fe->ops.search(fe); 687 /* We did do a search as was requested, the flags are 688 * now unset as well and has the flags wrt to search. 689 */ 690 } else { 691 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; 692 } 693 } 694 /* Track the carrier if the search was successful */ 695 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) { 696 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 697 fepriv->delay = HZ / 2; 698 } 699 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); 700 fe->ops.read_status(fe, &s); 701 if (s != fepriv->status) { 702 dvb_frontend_add_event(fe, s); /* update event list */ 703 fepriv->status = s; 704 if (!(s & FE_HAS_LOCK)) { 705 fepriv->delay = HZ / 10; 706 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 707 } else { 708 fepriv->delay = 60 * HZ; 709 } 710 } 711 break; 712 default: 713 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__); 714 break; 715 } 716 } else { 717 dvb_frontend_swzigzag(fe); 718 } 719 } 720 721 if (dvb_powerdown_on_sleep) { 722 if (fe->ops.set_voltage) 723 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); 724 if (fe->ops.tuner_ops.sleep) { 725 if (fe->ops.i2c_gate_ctrl) 726 fe->ops.i2c_gate_ctrl(fe, 1); 727 fe->ops.tuner_ops.sleep(fe); 728 if (fe->ops.i2c_gate_ctrl) 729 fe->ops.i2c_gate_ctrl(fe, 0); 730 } 731 if (fe->ops.sleep) 732 fe->ops.sleep(fe); 733 } 734 735 fepriv->thread = NULL; 736 if (kthread_should_stop()) 737 fe->exit = DVB_FE_DEVICE_REMOVED; 738 else 739 fe->exit = DVB_FE_NO_EXIT; 740 mb(); 741 742 if (semheld) 743 up(&fepriv->sem); 744 dvb_frontend_wakeup(fe); 745 return 0; 746 } 747 748 static void dvb_frontend_stop(struct dvb_frontend *fe) 749 { 750 struct dvb_frontend_private *fepriv = fe->frontend_priv; 751 752 dev_dbg(fe->dvb->device, "%s:\n", __func__); 753 754 if (fe->exit != DVB_FE_DEVICE_REMOVED) 755 fe->exit = DVB_FE_NORMAL_EXIT; 756 mb(); 757 758 if (!fepriv->thread) 759 return; 760 761 kthread_stop(fepriv->thread); 762 763 sema_init(&fepriv->sem, 1); 764 fepriv->state = FESTATE_IDLE; 765 766 /* paranoia check in case a signal arrived */ 767 if (fepriv->thread) 768 dev_warn(fe->dvb->device, 769 "dvb_frontend_stop: warning: thread %p won't exit\n", 770 fepriv->thread); 771 } 772 773 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) 774 { 775 return ((curtime.tv_usec < lasttime.tv_usec) ? 776 1000000 - lasttime.tv_usec + curtime.tv_usec : 777 curtime.tv_usec - lasttime.tv_usec); 778 } 779 EXPORT_SYMBOL(timeval_usec_diff); 780 781 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) 782 { 783 curtime->tv_usec += add_usec; 784 if (curtime->tv_usec >= 1000000) { 785 curtime->tv_usec -= 1000000; 786 curtime->tv_sec++; 787 } 788 } 789 790 /* 791 * Sleep until gettimeofday() > waketime + add_usec 792 * This needs to be as precise as possible, but as the delay is 793 * usually between 2ms and 32ms, it is done using a scheduled msleep 794 * followed by usleep (normally a busy-wait loop) for the remainder 795 */ 796 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) 797 { 798 struct timeval lasttime; 799 s32 delta, newdelta; 800 801 timeval_usec_add(waketime, add_usec); 802 803 do_gettimeofday(&lasttime); 804 delta = timeval_usec_diff(lasttime, *waketime); 805 if (delta > 2500) { 806 msleep((delta - 1500) / 1000); 807 do_gettimeofday(&lasttime); 808 newdelta = timeval_usec_diff(lasttime, *waketime); 809 delta = (newdelta > delta) ? 0 : newdelta; 810 } 811 if (delta > 0) 812 udelay(delta); 813 } 814 EXPORT_SYMBOL(dvb_frontend_sleep_until); 815 816 static int dvb_frontend_start(struct dvb_frontend *fe) 817 { 818 int ret; 819 struct dvb_frontend_private *fepriv = fe->frontend_priv; 820 struct task_struct *fe_thread; 821 822 dev_dbg(fe->dvb->device, "%s:\n", __func__); 823 824 if (fepriv->thread) { 825 if (fe->exit == DVB_FE_NO_EXIT) 826 return 0; 827 else 828 dvb_frontend_stop (fe); 829 } 830 831 if (signal_pending(current)) 832 return -EINTR; 833 if (down_interruptible (&fepriv->sem)) 834 return -EINTR; 835 836 fepriv->state = FESTATE_IDLE; 837 fe->exit = DVB_FE_NO_EXIT; 838 fepriv->thread = NULL; 839 mb(); 840 841 fe_thread = kthread_run(dvb_frontend_thread, fe, 842 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id); 843 if (IS_ERR(fe_thread)) { 844 ret = PTR_ERR(fe_thread); 845 dev_warn(fe->dvb->device, 846 "dvb_frontend_start: failed to start kthread (%d)\n", 847 ret); 848 up(&fepriv->sem); 849 return ret; 850 } 851 fepriv->thread = fe_thread; 852 return 0; 853 } 854 855 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe, 856 u32 *freq_min, u32 *freq_max) 857 { 858 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min); 859 860 if (fe->ops.info.frequency_max == 0) 861 *freq_max = fe->ops.tuner_ops.info.frequency_max; 862 else if (fe->ops.tuner_ops.info.frequency_max == 0) 863 *freq_max = fe->ops.info.frequency_max; 864 else 865 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max); 866 867 if (*freq_min == 0 || *freq_max == 0) 868 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n", 869 fe->dvb->num, fe->id); 870 } 871 872 static int dvb_frontend_check_parameters(struct dvb_frontend *fe) 873 { 874 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 875 u32 freq_min; 876 u32 freq_max; 877 878 /* range check: frequency */ 879 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max); 880 if ((freq_min && c->frequency < freq_min) || 881 (freq_max && c->frequency > freq_max)) { 882 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n", 883 fe->dvb->num, fe->id, c->frequency, 884 freq_min, freq_max); 885 return -EINVAL; 886 } 887 888 /* range check: symbol rate */ 889 switch (c->delivery_system) { 890 case SYS_DVBS: 891 case SYS_DVBS2: 892 case SYS_TURBO: 893 case SYS_DVBC_ANNEX_A: 894 case SYS_DVBC_ANNEX_C: 895 if ((fe->ops.info.symbol_rate_min && 896 c->symbol_rate < fe->ops.info.symbol_rate_min) || 897 (fe->ops.info.symbol_rate_max && 898 c->symbol_rate > fe->ops.info.symbol_rate_max)) { 899 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", 900 fe->dvb->num, fe->id, c->symbol_rate, 901 fe->ops.info.symbol_rate_min, 902 fe->ops.info.symbol_rate_max); 903 return -EINVAL; 904 } 905 default: 906 break; 907 } 908 909 return 0; 910 } 911 912 static int dvb_frontend_clear_cache(struct dvb_frontend *fe) 913 { 914 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 915 int i; 916 u32 delsys; 917 918 delsys = c->delivery_system; 919 memset(c, 0, offsetof(struct dtv_frontend_properties, strength)); 920 c->delivery_system = delsys; 921 922 c->state = DTV_CLEAR; 923 924 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n", 925 __func__, c->delivery_system); 926 927 c->transmission_mode = TRANSMISSION_MODE_AUTO; 928 c->bandwidth_hz = 0; /* AUTO */ 929 c->guard_interval = GUARD_INTERVAL_AUTO; 930 c->hierarchy = HIERARCHY_AUTO; 931 c->symbol_rate = 0; 932 c->code_rate_HP = FEC_AUTO; 933 c->code_rate_LP = FEC_AUTO; 934 c->fec_inner = FEC_AUTO; 935 c->rolloff = ROLLOFF_AUTO; 936 c->voltage = SEC_VOLTAGE_OFF; 937 c->sectone = SEC_TONE_OFF; 938 c->pilot = PILOT_AUTO; 939 940 c->isdbt_partial_reception = 0; 941 c->isdbt_sb_mode = 0; 942 c->isdbt_sb_subchannel = 0; 943 c->isdbt_sb_segment_idx = 0; 944 c->isdbt_sb_segment_count = 0; 945 c->isdbt_layer_enabled = 0; 946 for (i = 0; i < 3; i++) { 947 c->layer[i].fec = FEC_AUTO; 948 c->layer[i].modulation = QAM_AUTO; 949 c->layer[i].interleaving = 0; 950 c->layer[i].segment_count = 0; 951 } 952 953 c->stream_id = NO_STREAM_ID_FILTER; 954 955 switch (c->delivery_system) { 956 case SYS_DVBS: 957 case SYS_DVBS2: 958 case SYS_TURBO: 959 c->modulation = QPSK; /* implied for DVB-S in legacy API */ 960 c->rolloff = ROLLOFF_35;/* implied for DVB-S */ 961 break; 962 case SYS_ATSC: 963 c->modulation = VSB_8; 964 break; 965 default: 966 c->modulation = QAM_AUTO; 967 break; 968 } 969 970 c->lna = LNA_AUTO; 971 972 return 0; 973 } 974 975 #define _DTV_CMD(n, s, b) \ 976 [n] = { \ 977 .name = #n, \ 978 .cmd = n, \ 979 .set = s,\ 980 .buffer = b \ 981 } 982 983 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = { 984 _DTV_CMD(DTV_TUNE, 1, 0), 985 _DTV_CMD(DTV_CLEAR, 1, 0), 986 987 /* Set */ 988 _DTV_CMD(DTV_FREQUENCY, 1, 0), 989 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), 990 _DTV_CMD(DTV_MODULATION, 1, 0), 991 _DTV_CMD(DTV_INVERSION, 1, 0), 992 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), 993 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), 994 _DTV_CMD(DTV_INNER_FEC, 1, 0), 995 _DTV_CMD(DTV_VOLTAGE, 1, 0), 996 _DTV_CMD(DTV_TONE, 1, 0), 997 _DTV_CMD(DTV_PILOT, 1, 0), 998 _DTV_CMD(DTV_ROLLOFF, 1, 0), 999 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), 1000 _DTV_CMD(DTV_HIERARCHY, 1, 0), 1001 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), 1002 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), 1003 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), 1004 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), 1005 _DTV_CMD(DTV_INTERLEAVING, 1, 0), 1006 1007 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), 1008 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), 1009 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), 1010 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), 1011 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), 1012 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), 1013 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), 1014 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), 1015 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), 1016 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), 1017 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), 1018 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), 1019 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), 1020 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), 1021 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), 1022 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), 1023 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), 1024 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), 1025 1026 _DTV_CMD(DTV_STREAM_ID, 1, 0), 1027 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0), 1028 _DTV_CMD(DTV_LNA, 1, 0), 1029 1030 /* Get */ 1031 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), 1032 _DTV_CMD(DTV_API_VERSION, 0, 0), 1033 1034 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0), 1035 1036 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0), 1037 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0), 1038 1039 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0), 1040 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0), 1041 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0), 1042 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0), 1043 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0), 1044 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0), 1045 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0), 1046 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0), 1047 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0), 1048 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0), 1049 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0), 1050 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0), 1051 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0), 1052 1053 /* Statistics API */ 1054 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0), 1055 _DTV_CMD(DTV_STAT_CNR, 0, 0), 1056 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0), 1057 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0), 1058 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0), 1059 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0), 1060 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0), 1061 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0), 1062 }; 1063 1064 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp) 1065 { 1066 int i; 1067 1068 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) { 1069 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n", 1070 __func__, tvp->cmd); 1071 return; 1072 } 1073 1074 dev_dbg(fe->dvb->device, "%s: tvp.cmd = 0x%08x (%s)\n", __func__, 1075 tvp->cmd, dtv_cmds[tvp->cmd].name); 1076 1077 if (dtv_cmds[tvp->cmd].buffer) { 1078 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n", 1079 __func__, tvp->u.buffer.len); 1080 1081 for(i = 0; i < tvp->u.buffer.len; i++) 1082 dev_dbg(fe->dvb->device, 1083 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n", 1084 __func__, i, tvp->u.buffer.data[i]); 1085 } else { 1086 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__, 1087 tvp->u.data); 1088 } 1089 } 1090 1091 /* Synchronise the legacy tuning parameters into the cache, so that demodulator 1092 * drivers can use a single set_frontend tuning function, regardless of whether 1093 * it's being used for the legacy or new API, reducing code and complexity. 1094 */ 1095 static int dtv_property_cache_sync(struct dvb_frontend *fe, 1096 struct dtv_frontend_properties *c, 1097 const struct dvb_frontend_parameters *p) 1098 { 1099 c->frequency = p->frequency; 1100 c->inversion = p->inversion; 1101 1102 switch (dvbv3_type(c->delivery_system)) { 1103 case DVBV3_QPSK: 1104 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1105 c->symbol_rate = p->u.qpsk.symbol_rate; 1106 c->fec_inner = p->u.qpsk.fec_inner; 1107 break; 1108 case DVBV3_QAM: 1109 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1110 c->symbol_rate = p->u.qam.symbol_rate; 1111 c->fec_inner = p->u.qam.fec_inner; 1112 c->modulation = p->u.qam.modulation; 1113 break; 1114 case DVBV3_OFDM: 1115 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1116 1117 switch (p->u.ofdm.bandwidth) { 1118 case BANDWIDTH_10_MHZ: 1119 c->bandwidth_hz = 10000000; 1120 break; 1121 case BANDWIDTH_8_MHZ: 1122 c->bandwidth_hz = 8000000; 1123 break; 1124 case BANDWIDTH_7_MHZ: 1125 c->bandwidth_hz = 7000000; 1126 break; 1127 case BANDWIDTH_6_MHZ: 1128 c->bandwidth_hz = 6000000; 1129 break; 1130 case BANDWIDTH_5_MHZ: 1131 c->bandwidth_hz = 5000000; 1132 break; 1133 case BANDWIDTH_1_712_MHZ: 1134 c->bandwidth_hz = 1712000; 1135 break; 1136 case BANDWIDTH_AUTO: 1137 c->bandwidth_hz = 0; 1138 } 1139 1140 c->code_rate_HP = p->u.ofdm.code_rate_HP; 1141 c->code_rate_LP = p->u.ofdm.code_rate_LP; 1142 c->modulation = p->u.ofdm.constellation; 1143 c->transmission_mode = p->u.ofdm.transmission_mode; 1144 c->guard_interval = p->u.ofdm.guard_interval; 1145 c->hierarchy = p->u.ofdm.hierarchy_information; 1146 break; 1147 case DVBV3_ATSC: 1148 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__); 1149 c->modulation = p->u.vsb.modulation; 1150 if (c->delivery_system == SYS_ATSCMH) 1151 break; 1152 if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) 1153 c->delivery_system = SYS_ATSC; 1154 else 1155 c->delivery_system = SYS_DVBC_ANNEX_B; 1156 break; 1157 case DVBV3_UNKNOWN: 1158 dev_err(fe->dvb->device, 1159 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1160 __func__, c->delivery_system); 1161 return -EINVAL; 1162 } 1163 1164 return 0; 1165 } 1166 1167 /* Ensure the cached values are set correctly in the frontend 1168 * legacy tuning structures, for the advanced tuning API. 1169 */ 1170 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, 1171 struct dvb_frontend_parameters *p) 1172 { 1173 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1174 1175 p->frequency = c->frequency; 1176 p->inversion = c->inversion; 1177 1178 switch (dvbv3_type(c->delivery_system)) { 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 case DVBV3_QPSK: 1185 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1186 p->u.qpsk.symbol_rate = c->symbol_rate; 1187 p->u.qpsk.fec_inner = c->fec_inner; 1188 break; 1189 case DVBV3_QAM: 1190 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1191 p->u.qam.symbol_rate = c->symbol_rate; 1192 p->u.qam.fec_inner = c->fec_inner; 1193 p->u.qam.modulation = c->modulation; 1194 break; 1195 case DVBV3_OFDM: 1196 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1197 switch (c->bandwidth_hz) { 1198 case 10000000: 1199 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ; 1200 break; 1201 case 8000000: 1202 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1203 break; 1204 case 7000000: 1205 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1206 break; 1207 case 6000000: 1208 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1209 break; 1210 case 5000000: 1211 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ; 1212 break; 1213 case 1712000: 1214 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ; 1215 break; 1216 case 0: 1217 default: 1218 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1219 } 1220 p->u.ofdm.code_rate_HP = c->code_rate_HP; 1221 p->u.ofdm.code_rate_LP = c->code_rate_LP; 1222 p->u.ofdm.constellation = c->modulation; 1223 p->u.ofdm.transmission_mode = c->transmission_mode; 1224 p->u.ofdm.guard_interval = c->guard_interval; 1225 p->u.ofdm.hierarchy_information = c->hierarchy; 1226 break; 1227 case DVBV3_ATSC: 1228 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__); 1229 p->u.vsb.modulation = c->modulation; 1230 break; 1231 } 1232 return 0; 1233 } 1234 1235 /** 1236 * dtv_get_frontend - calls a callback for retrieving DTV parameters 1237 * @fe: struct dvb_frontend pointer 1238 * @c: struct dtv_frontend_properties pointer (DVBv5 cache) 1239 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct) 1240 * 1241 * This routine calls either the DVBv3 or DVBv5 get_frontend call. 1242 * If c is not null, it will update the DVBv5 cache struct pointed by it. 1243 * If p_out is not null, it will update the DVBv3 params pointed by it. 1244 */ 1245 static int dtv_get_frontend(struct dvb_frontend *fe, 1246 struct dvb_frontend_parameters *p_out) 1247 { 1248 int r; 1249 1250 if (fe->ops.get_frontend) { 1251 r = fe->ops.get_frontend(fe); 1252 if (unlikely(r < 0)) 1253 return r; 1254 if (p_out) 1255 dtv_property_legacy_params_sync(fe, p_out); 1256 return 0; 1257 } 1258 1259 /* As everything is in cache, get_frontend fops are always supported */ 1260 return 0; 1261 } 1262 1263 static int dvb_frontend_ioctl_legacy(struct file *file, 1264 unsigned int cmd, void *parg); 1265 static int dvb_frontend_ioctl_properties(struct file *file, 1266 unsigned int cmd, void *parg); 1267 1268 static int dtv_property_process_get(struct dvb_frontend *fe, 1269 const struct dtv_frontend_properties *c, 1270 struct dtv_property *tvp, 1271 struct file *file) 1272 { 1273 int r, ncaps; 1274 1275 switch(tvp->cmd) { 1276 case DTV_ENUM_DELSYS: 1277 ncaps = 0; 1278 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1279 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps]; 1280 ncaps++; 1281 } 1282 tvp->u.buffer.len = ncaps; 1283 break; 1284 case DTV_FREQUENCY: 1285 tvp->u.data = c->frequency; 1286 break; 1287 case DTV_MODULATION: 1288 tvp->u.data = c->modulation; 1289 break; 1290 case DTV_BANDWIDTH_HZ: 1291 tvp->u.data = c->bandwidth_hz; 1292 break; 1293 case DTV_INVERSION: 1294 tvp->u.data = c->inversion; 1295 break; 1296 case DTV_SYMBOL_RATE: 1297 tvp->u.data = c->symbol_rate; 1298 break; 1299 case DTV_INNER_FEC: 1300 tvp->u.data = c->fec_inner; 1301 break; 1302 case DTV_PILOT: 1303 tvp->u.data = c->pilot; 1304 break; 1305 case DTV_ROLLOFF: 1306 tvp->u.data = c->rolloff; 1307 break; 1308 case DTV_DELIVERY_SYSTEM: 1309 tvp->u.data = c->delivery_system; 1310 break; 1311 case DTV_VOLTAGE: 1312 tvp->u.data = c->voltage; 1313 break; 1314 case DTV_TONE: 1315 tvp->u.data = c->sectone; 1316 break; 1317 case DTV_API_VERSION: 1318 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; 1319 break; 1320 case DTV_CODE_RATE_HP: 1321 tvp->u.data = c->code_rate_HP; 1322 break; 1323 case DTV_CODE_RATE_LP: 1324 tvp->u.data = c->code_rate_LP; 1325 break; 1326 case DTV_GUARD_INTERVAL: 1327 tvp->u.data = c->guard_interval; 1328 break; 1329 case DTV_TRANSMISSION_MODE: 1330 tvp->u.data = c->transmission_mode; 1331 break; 1332 case DTV_HIERARCHY: 1333 tvp->u.data = c->hierarchy; 1334 break; 1335 case DTV_INTERLEAVING: 1336 tvp->u.data = c->interleaving; 1337 break; 1338 1339 /* ISDB-T Support here */ 1340 case DTV_ISDBT_PARTIAL_RECEPTION: 1341 tvp->u.data = c->isdbt_partial_reception; 1342 break; 1343 case DTV_ISDBT_SOUND_BROADCASTING: 1344 tvp->u.data = c->isdbt_sb_mode; 1345 break; 1346 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1347 tvp->u.data = c->isdbt_sb_subchannel; 1348 break; 1349 case DTV_ISDBT_SB_SEGMENT_IDX: 1350 tvp->u.data = c->isdbt_sb_segment_idx; 1351 break; 1352 case DTV_ISDBT_SB_SEGMENT_COUNT: 1353 tvp->u.data = c->isdbt_sb_segment_count; 1354 break; 1355 case DTV_ISDBT_LAYER_ENABLED: 1356 tvp->u.data = c->isdbt_layer_enabled; 1357 break; 1358 case DTV_ISDBT_LAYERA_FEC: 1359 tvp->u.data = c->layer[0].fec; 1360 break; 1361 case DTV_ISDBT_LAYERA_MODULATION: 1362 tvp->u.data = c->layer[0].modulation; 1363 break; 1364 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1365 tvp->u.data = c->layer[0].segment_count; 1366 break; 1367 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1368 tvp->u.data = c->layer[0].interleaving; 1369 break; 1370 case DTV_ISDBT_LAYERB_FEC: 1371 tvp->u.data = c->layer[1].fec; 1372 break; 1373 case DTV_ISDBT_LAYERB_MODULATION: 1374 tvp->u.data = c->layer[1].modulation; 1375 break; 1376 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1377 tvp->u.data = c->layer[1].segment_count; 1378 break; 1379 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1380 tvp->u.data = c->layer[1].interleaving; 1381 break; 1382 case DTV_ISDBT_LAYERC_FEC: 1383 tvp->u.data = c->layer[2].fec; 1384 break; 1385 case DTV_ISDBT_LAYERC_MODULATION: 1386 tvp->u.data = c->layer[2].modulation; 1387 break; 1388 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1389 tvp->u.data = c->layer[2].segment_count; 1390 break; 1391 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1392 tvp->u.data = c->layer[2].interleaving; 1393 break; 1394 1395 /* Multistream support */ 1396 case DTV_STREAM_ID: 1397 case DTV_DVBT2_PLP_ID_LEGACY: 1398 tvp->u.data = c->stream_id; 1399 break; 1400 1401 /* ATSC-MH */ 1402 case DTV_ATSCMH_FIC_VER: 1403 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver; 1404 break; 1405 case DTV_ATSCMH_PARADE_ID: 1406 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id; 1407 break; 1408 case DTV_ATSCMH_NOG: 1409 tvp->u.data = fe->dtv_property_cache.atscmh_nog; 1410 break; 1411 case DTV_ATSCMH_TNOG: 1412 tvp->u.data = fe->dtv_property_cache.atscmh_tnog; 1413 break; 1414 case DTV_ATSCMH_SGN: 1415 tvp->u.data = fe->dtv_property_cache.atscmh_sgn; 1416 break; 1417 case DTV_ATSCMH_PRC: 1418 tvp->u.data = fe->dtv_property_cache.atscmh_prc; 1419 break; 1420 case DTV_ATSCMH_RS_FRAME_MODE: 1421 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode; 1422 break; 1423 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1424 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble; 1425 break; 1426 case DTV_ATSCMH_RS_CODE_MODE_PRI: 1427 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri; 1428 break; 1429 case DTV_ATSCMH_RS_CODE_MODE_SEC: 1430 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec; 1431 break; 1432 case DTV_ATSCMH_SCCC_BLOCK_MODE: 1433 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode; 1434 break; 1435 case DTV_ATSCMH_SCCC_CODE_MODE_A: 1436 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a; 1437 break; 1438 case DTV_ATSCMH_SCCC_CODE_MODE_B: 1439 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b; 1440 break; 1441 case DTV_ATSCMH_SCCC_CODE_MODE_C: 1442 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c; 1443 break; 1444 case DTV_ATSCMH_SCCC_CODE_MODE_D: 1445 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d; 1446 break; 1447 1448 case DTV_LNA: 1449 tvp->u.data = c->lna; 1450 break; 1451 1452 /* Fill quality measures */ 1453 case DTV_STAT_SIGNAL_STRENGTH: 1454 tvp->u.st = c->strength; 1455 break; 1456 case DTV_STAT_CNR: 1457 tvp->u.st = c->cnr; 1458 break; 1459 case DTV_STAT_PRE_ERROR_BIT_COUNT: 1460 tvp->u.st = c->pre_bit_error; 1461 break; 1462 case DTV_STAT_PRE_TOTAL_BIT_COUNT: 1463 tvp->u.st = c->pre_bit_count; 1464 break; 1465 case DTV_STAT_POST_ERROR_BIT_COUNT: 1466 tvp->u.st = c->post_bit_error; 1467 break; 1468 case DTV_STAT_POST_TOTAL_BIT_COUNT: 1469 tvp->u.st = c->post_bit_count; 1470 break; 1471 case DTV_STAT_ERROR_BLOCK_COUNT: 1472 tvp->u.st = c->block_error; 1473 break; 1474 case DTV_STAT_TOTAL_BLOCK_COUNT: 1475 tvp->u.st = c->block_count; 1476 break; 1477 default: 1478 dev_dbg(fe->dvb->device, 1479 "%s: FE property %d doesn't exist\n", 1480 __func__, tvp->cmd); 1481 return -EINVAL; 1482 } 1483 1484 /* Allow the frontend to override outgoing properties */ 1485 if (fe->ops.get_property) { 1486 r = fe->ops.get_property(fe, tvp); 1487 if (r < 0) 1488 return r; 1489 } 1490 1491 dtv_property_dump(fe, tvp); 1492 1493 return 0; 1494 } 1495 1496 static int dtv_set_frontend(struct dvb_frontend *fe); 1497 1498 static bool is_dvbv3_delsys(u32 delsys) 1499 { 1500 bool status; 1501 1502 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) || 1503 (delsys == SYS_DVBS) || (delsys == SYS_ATSC); 1504 1505 return status; 1506 } 1507 1508 /** 1509 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type 1510 * @fe: struct frontend; 1511 * @delsys: DVBv5 type that will be used for emulation 1512 * 1513 * Provides emulation for delivery systems that are compatible with the old 1514 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows 1515 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent 1516 * parameters are compatible with DVB-S spec. 1517 */ 1518 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys) 1519 { 1520 int i; 1521 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1522 1523 c->delivery_system = delsys; 1524 1525 /* 1526 * If the call is for ISDB-T, put it into full-seg, auto mode, TV 1527 */ 1528 if (c->delivery_system == SYS_ISDBT) { 1529 dev_dbg(fe->dvb->device, 1530 "%s: Using defaults for SYS_ISDBT\n", 1531 __func__); 1532 1533 if (!c->bandwidth_hz) 1534 c->bandwidth_hz = 6000000; 1535 1536 c->isdbt_partial_reception = 0; 1537 c->isdbt_sb_mode = 0; 1538 c->isdbt_sb_subchannel = 0; 1539 c->isdbt_sb_segment_idx = 0; 1540 c->isdbt_sb_segment_count = 0; 1541 c->isdbt_layer_enabled = 7; 1542 for (i = 0; i < 3; i++) { 1543 c->layer[i].fec = FEC_AUTO; 1544 c->layer[i].modulation = QAM_AUTO; 1545 c->layer[i].interleaving = 0; 1546 c->layer[i].segment_count = 0; 1547 } 1548 } 1549 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n", 1550 __func__, c->delivery_system); 1551 1552 return 0; 1553 } 1554 1555 /** 1556 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call 1557 * @fe: frontend struct 1558 * @desired_system: delivery system requested by the user 1559 * 1560 * A DVBv5 call know what's the desired system it wants. So, set it. 1561 * 1562 * There are, however, a few known issues with early DVBv5 applications that 1563 * are also handled by this logic: 1564 * 1565 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system. 1566 * This is an API violation, but, as we don't want to break userspace, 1567 * convert it to the first supported delivery system. 1568 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for 1569 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of 1570 * ISDB-T provided backward compat with DVB-T. 1571 */ 1572 static int dvbv5_set_delivery_system(struct dvb_frontend *fe, 1573 u32 desired_system) 1574 { 1575 int ncaps; 1576 u32 delsys = SYS_UNDEFINED; 1577 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1578 enum dvbv3_emulation_type type; 1579 1580 /* 1581 * It was reported that some old DVBv5 applications were 1582 * filling delivery_system with SYS_UNDEFINED. If this happens, 1583 * assume that the application wants to use the first supported 1584 * delivery system. 1585 */ 1586 if (desired_system == SYS_UNDEFINED) 1587 desired_system = fe->ops.delsys[0]; 1588 1589 /* 1590 * This is a DVBv5 call. So, it likely knows the supported 1591 * delivery systems. So, check if the desired delivery system is 1592 * supported 1593 */ 1594 ncaps = 0; 1595 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1596 if (fe->ops.delsys[ncaps] == desired_system) { 1597 c->delivery_system = desired_system; 1598 dev_dbg(fe->dvb->device, 1599 "%s: Changing delivery system to %d\n", 1600 __func__, desired_system); 1601 return 0; 1602 } 1603 ncaps++; 1604 } 1605 1606 /* 1607 * The requested delivery system isn't supported. Maybe userspace 1608 * is requesting a DVBv3 compatible delivery system. 1609 * 1610 * The emulation only works if the desired system is one of the 1611 * delivery systems supported by DVBv3 API 1612 */ 1613 if (!is_dvbv3_delsys(desired_system)) { 1614 dev_dbg(fe->dvb->device, 1615 "%s: Delivery system %d not supported.\n", 1616 __func__, desired_system); 1617 return -EINVAL; 1618 } 1619 1620 type = dvbv3_type(desired_system); 1621 1622 /* 1623 * Get the last non-DVBv3 delivery system that has the same type 1624 * of the desired system 1625 */ 1626 ncaps = 0; 1627 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1628 if (dvbv3_type(fe->ops.delsys[ncaps]) == type) 1629 delsys = fe->ops.delsys[ncaps]; 1630 ncaps++; 1631 } 1632 1633 /* There's nothing compatible with the desired delivery system */ 1634 if (delsys == SYS_UNDEFINED) { 1635 dev_dbg(fe->dvb->device, 1636 "%s: Delivery system %d not supported on emulation mode.\n", 1637 __func__, desired_system); 1638 return -EINVAL; 1639 } 1640 1641 dev_dbg(fe->dvb->device, 1642 "%s: Using delivery system %d emulated as if it were %d\n", 1643 __func__, delsys, desired_system); 1644 1645 return emulate_delivery_system(fe, desired_system); 1646 } 1647 1648 /** 1649 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call 1650 * @fe: frontend struct 1651 * 1652 * A DVBv3 call doesn't know what's the desired system it wants. It also 1653 * doesn't allow to switch between different types. Due to that, userspace 1654 * should use DVBv5 instead. 1655 * However, in order to avoid breaking userspace API, limited backward 1656 * compatibility support is provided. 1657 * 1658 * There are some delivery systems that are incompatible with DVBv3 calls. 1659 * 1660 * This routine should work fine for frontends that support just one delivery 1661 * system. 1662 * 1663 * For frontends that support multiple frontends: 1664 * 1) It defaults to use the first supported delivery system. There's an 1665 * userspace application that allows changing it at runtime; 1666 * 1667 * 2) If the current delivery system is not compatible with DVBv3, it gets 1668 * the first one that it is compatible. 1669 * 1670 * NOTE: in order for this to work with applications like Kaffeine that 1671 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to 1672 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the 1673 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back 1674 * to DVB-S. 1675 */ 1676 static int dvbv3_set_delivery_system(struct dvb_frontend *fe) 1677 { 1678 int ncaps; 1679 u32 delsys = SYS_UNDEFINED; 1680 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1681 1682 /* If not set yet, defaults to the first supported delivery system */ 1683 if (c->delivery_system == SYS_UNDEFINED) 1684 c->delivery_system = fe->ops.delsys[0]; 1685 1686 /* 1687 * Trivial case: just use the current one, if it already a DVBv3 1688 * delivery system 1689 */ 1690 if (is_dvbv3_delsys(c->delivery_system)) { 1691 dev_dbg(fe->dvb->device, 1692 "%s: Using delivery system to %d\n", 1693 __func__, c->delivery_system); 1694 return 0; 1695 } 1696 1697 /* 1698 * Seek for the first delivery system that it is compatible with a 1699 * DVBv3 standard 1700 */ 1701 ncaps = 0; 1702 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { 1703 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) { 1704 delsys = fe->ops.delsys[ncaps]; 1705 break; 1706 } 1707 ncaps++; 1708 } 1709 if (delsys == SYS_UNDEFINED) { 1710 dev_dbg(fe->dvb->device, 1711 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n", 1712 __func__); 1713 return -EINVAL; 1714 } 1715 return emulate_delivery_system(fe, delsys); 1716 } 1717 1718 static int dtv_property_process_set(struct dvb_frontend *fe, 1719 struct dtv_property *tvp, 1720 struct file *file) 1721 { 1722 int r = 0; 1723 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1724 1725 /* Allow the frontend to validate incoming properties */ 1726 if (fe->ops.set_property) { 1727 r = fe->ops.set_property(fe, tvp); 1728 if (r < 0) 1729 return r; 1730 } 1731 1732 switch(tvp->cmd) { 1733 case DTV_CLEAR: 1734 /* 1735 * Reset a cache of data specific to the frontend here. This does 1736 * not effect hardware. 1737 */ 1738 dvb_frontend_clear_cache(fe); 1739 break; 1740 case DTV_TUNE: 1741 /* interpret the cache of data, build either a traditional frontend 1742 * tunerequest so we can pass validation in the FE_SET_FRONTEND 1743 * ioctl. 1744 */ 1745 c->state = tvp->cmd; 1746 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n", 1747 __func__); 1748 1749 r = dtv_set_frontend(fe); 1750 break; 1751 case DTV_FREQUENCY: 1752 c->frequency = tvp->u.data; 1753 break; 1754 case DTV_MODULATION: 1755 c->modulation = tvp->u.data; 1756 break; 1757 case DTV_BANDWIDTH_HZ: 1758 c->bandwidth_hz = tvp->u.data; 1759 break; 1760 case DTV_INVERSION: 1761 c->inversion = tvp->u.data; 1762 break; 1763 case DTV_SYMBOL_RATE: 1764 c->symbol_rate = tvp->u.data; 1765 break; 1766 case DTV_INNER_FEC: 1767 c->fec_inner = tvp->u.data; 1768 break; 1769 case DTV_PILOT: 1770 c->pilot = tvp->u.data; 1771 break; 1772 case DTV_ROLLOFF: 1773 c->rolloff = tvp->u.data; 1774 break; 1775 case DTV_DELIVERY_SYSTEM: 1776 r = dvbv5_set_delivery_system(fe, tvp->u.data); 1777 break; 1778 case DTV_VOLTAGE: 1779 c->voltage = tvp->u.data; 1780 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE, 1781 (void *)c->voltage); 1782 break; 1783 case DTV_TONE: 1784 c->sectone = tvp->u.data; 1785 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE, 1786 (void *)c->sectone); 1787 break; 1788 case DTV_CODE_RATE_HP: 1789 c->code_rate_HP = tvp->u.data; 1790 break; 1791 case DTV_CODE_RATE_LP: 1792 c->code_rate_LP = tvp->u.data; 1793 break; 1794 case DTV_GUARD_INTERVAL: 1795 c->guard_interval = tvp->u.data; 1796 break; 1797 case DTV_TRANSMISSION_MODE: 1798 c->transmission_mode = tvp->u.data; 1799 break; 1800 case DTV_HIERARCHY: 1801 c->hierarchy = tvp->u.data; 1802 break; 1803 case DTV_INTERLEAVING: 1804 c->interleaving = tvp->u.data; 1805 break; 1806 1807 /* ISDB-T Support here */ 1808 case DTV_ISDBT_PARTIAL_RECEPTION: 1809 c->isdbt_partial_reception = tvp->u.data; 1810 break; 1811 case DTV_ISDBT_SOUND_BROADCASTING: 1812 c->isdbt_sb_mode = tvp->u.data; 1813 break; 1814 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1815 c->isdbt_sb_subchannel = tvp->u.data; 1816 break; 1817 case DTV_ISDBT_SB_SEGMENT_IDX: 1818 c->isdbt_sb_segment_idx = tvp->u.data; 1819 break; 1820 case DTV_ISDBT_SB_SEGMENT_COUNT: 1821 c->isdbt_sb_segment_count = tvp->u.data; 1822 break; 1823 case DTV_ISDBT_LAYER_ENABLED: 1824 c->isdbt_layer_enabled = tvp->u.data; 1825 break; 1826 case DTV_ISDBT_LAYERA_FEC: 1827 c->layer[0].fec = tvp->u.data; 1828 break; 1829 case DTV_ISDBT_LAYERA_MODULATION: 1830 c->layer[0].modulation = tvp->u.data; 1831 break; 1832 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1833 c->layer[0].segment_count = tvp->u.data; 1834 break; 1835 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1836 c->layer[0].interleaving = tvp->u.data; 1837 break; 1838 case DTV_ISDBT_LAYERB_FEC: 1839 c->layer[1].fec = tvp->u.data; 1840 break; 1841 case DTV_ISDBT_LAYERB_MODULATION: 1842 c->layer[1].modulation = tvp->u.data; 1843 break; 1844 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1845 c->layer[1].segment_count = tvp->u.data; 1846 break; 1847 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1848 c->layer[1].interleaving = tvp->u.data; 1849 break; 1850 case DTV_ISDBT_LAYERC_FEC: 1851 c->layer[2].fec = tvp->u.data; 1852 break; 1853 case DTV_ISDBT_LAYERC_MODULATION: 1854 c->layer[2].modulation = tvp->u.data; 1855 break; 1856 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1857 c->layer[2].segment_count = tvp->u.data; 1858 break; 1859 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1860 c->layer[2].interleaving = tvp->u.data; 1861 break; 1862 1863 /* Multistream support */ 1864 case DTV_STREAM_ID: 1865 case DTV_DVBT2_PLP_ID_LEGACY: 1866 c->stream_id = tvp->u.data; 1867 break; 1868 1869 /* ATSC-MH */ 1870 case DTV_ATSCMH_PARADE_ID: 1871 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data; 1872 break; 1873 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1874 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data; 1875 break; 1876 1877 case DTV_LNA: 1878 c->lna = tvp->u.data; 1879 if (fe->ops.set_lna) 1880 r = fe->ops.set_lna(fe); 1881 if (r < 0) 1882 c->lna = LNA_AUTO; 1883 break; 1884 1885 default: 1886 return -EINVAL; 1887 } 1888 1889 return r; 1890 } 1891 1892 static int dvb_frontend_ioctl(struct file *file, 1893 unsigned int cmd, void *parg) 1894 { 1895 struct dvb_device *dvbdev = file->private_data; 1896 struct dvb_frontend *fe = dvbdev->priv; 1897 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1898 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1899 int err = -EOPNOTSUPP; 1900 1901 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd)); 1902 if (down_interruptible(&fepriv->sem)) 1903 return -ERESTARTSYS; 1904 1905 if (fe->exit != DVB_FE_NO_EXIT) { 1906 up(&fepriv->sem); 1907 return -ENODEV; 1908 } 1909 1910 if ((file->f_flags & O_ACCMODE) == O_RDONLY && 1911 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || 1912 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) { 1913 up(&fepriv->sem); 1914 return -EPERM; 1915 } 1916 1917 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY)) 1918 err = dvb_frontend_ioctl_properties(file, cmd, parg); 1919 else { 1920 c->state = DTV_UNDEFINED; 1921 err = dvb_frontend_ioctl_legacy(file, cmd, parg); 1922 } 1923 1924 up(&fepriv->sem); 1925 return err; 1926 } 1927 1928 static int dvb_frontend_ioctl_properties(struct file *file, 1929 unsigned int cmd, void *parg) 1930 { 1931 struct dvb_device *dvbdev = file->private_data; 1932 struct dvb_frontend *fe = dvbdev->priv; 1933 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1934 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1935 int err = 0; 1936 1937 struct dtv_properties *tvps = NULL; 1938 struct dtv_property *tvp = NULL; 1939 int i; 1940 1941 dev_dbg(fe->dvb->device, "%s:\n", __func__); 1942 1943 if(cmd == FE_SET_PROPERTY) { 1944 tvps = (struct dtv_properties __user *)parg; 1945 1946 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); 1947 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props); 1948 1949 /* Put an arbitrary limit on the number of messages that can 1950 * be sent at once */ 1951 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1952 return -EINVAL; 1953 1954 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1955 if (!tvp) { 1956 err = -ENOMEM; 1957 goto out; 1958 } 1959 1960 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1961 err = -EFAULT; 1962 goto out; 1963 } 1964 1965 for (i = 0; i < tvps->num; i++) { 1966 err = dtv_property_process_set(fe, tvp + i, file); 1967 if (err < 0) 1968 goto out; 1969 (tvp + i)->result = err; 1970 } 1971 1972 if (c->state == DTV_TUNE) 1973 dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__); 1974 1975 } else 1976 if(cmd == FE_GET_PROPERTY) { 1977 tvps = (struct dtv_properties __user *)parg; 1978 1979 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); 1980 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props); 1981 1982 /* Put an arbitrary limit on the number of messages that can 1983 * be sent at once */ 1984 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1985 return -EINVAL; 1986 1987 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1988 if (!tvp) { 1989 err = -ENOMEM; 1990 goto out; 1991 } 1992 1993 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1994 err = -EFAULT; 1995 goto out; 1996 } 1997 1998 /* 1999 * Fills the cache out struct with the cache contents, plus 2000 * the data retrieved from get_frontend, if the frontend 2001 * is not idle. Otherwise, returns the cached content 2002 */ 2003 if (fepriv->state != FESTATE_IDLE) { 2004 err = dtv_get_frontend(fe, NULL); 2005 if (err < 0) 2006 goto out; 2007 } 2008 for (i = 0; i < tvps->num; i++) { 2009 err = dtv_property_process_get(fe, c, tvp + i, file); 2010 if (err < 0) 2011 goto out; 2012 (tvp + i)->result = err; 2013 } 2014 2015 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) { 2016 err = -EFAULT; 2017 goto out; 2018 } 2019 2020 } else 2021 err = -EOPNOTSUPP; 2022 2023 out: 2024 kfree(tvp); 2025 return err; 2026 } 2027 2028 static int dtv_set_frontend(struct dvb_frontend *fe) 2029 { 2030 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2031 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2032 struct dvb_frontend_tune_settings fetunesettings; 2033 u32 rolloff = 0; 2034 2035 if (dvb_frontend_check_parameters(fe) < 0) 2036 return -EINVAL; 2037 2038 /* 2039 * Initialize output parameters to match the values given by 2040 * the user. FE_SET_FRONTEND triggers an initial frontend event 2041 * with status = 0, which copies output parameters to userspace. 2042 */ 2043 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); 2044 2045 /* 2046 * Be sure that the bandwidth will be filled for all 2047 * non-satellite systems, as tuners need to know what 2048 * low pass/Nyquist half filter should be applied, in 2049 * order to avoid inter-channel noise. 2050 * 2051 * ISDB-T and DVB-T/T2 already sets bandwidth. 2052 * ATSC and DVB-C don't set, so, the core should fill it. 2053 * 2054 * On DVB-C Annex A and C, the bandwidth is a function of 2055 * the roll-off and symbol rate. Annex B defines different 2056 * roll-off factors depending on the modulation. Fortunately, 2057 * Annex B is only used with 6MHz, so there's no need to 2058 * calculate it. 2059 * 2060 * While not officially supported, a side effect of handling it at 2061 * the cache level is that a program could retrieve the bandwidth 2062 * via DTV_BANDWIDTH_HZ, which may be useful for test programs. 2063 */ 2064 switch (c->delivery_system) { 2065 case SYS_ATSC: 2066 case SYS_DVBC_ANNEX_B: 2067 c->bandwidth_hz = 6000000; 2068 break; 2069 case SYS_DVBC_ANNEX_A: 2070 rolloff = 115; 2071 break; 2072 case SYS_DVBC_ANNEX_C: 2073 rolloff = 113; 2074 break; 2075 default: 2076 break; 2077 } 2078 if (rolloff) 2079 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100; 2080 2081 /* force auto frequency inversion if requested */ 2082 if (dvb_force_auto_inversion) 2083 c->inversion = INVERSION_AUTO; 2084 2085 /* 2086 * without hierarchical coding code_rate_LP is irrelevant, 2087 * so we tolerate the otherwise invalid FEC_NONE setting 2088 */ 2089 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE) 2090 c->code_rate_LP = FEC_AUTO; 2091 2092 /* get frontend-specific tuning settings */ 2093 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); 2094 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { 2095 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; 2096 fepriv->max_drift = fetunesettings.max_drift; 2097 fepriv->step_size = fetunesettings.step_size; 2098 } else { 2099 /* default values */ 2100 switch (c->delivery_system) { 2101 case SYS_DVBS: 2102 case SYS_DVBS2: 2103 case SYS_ISDBS: 2104 case SYS_TURBO: 2105 case SYS_DVBC_ANNEX_A: 2106 case SYS_DVBC_ANNEX_C: 2107 fepriv->min_delay = HZ / 20; 2108 fepriv->step_size = c->symbol_rate / 16000; 2109 fepriv->max_drift = c->symbol_rate / 2000; 2110 break; 2111 case SYS_DVBT: 2112 case SYS_DVBT2: 2113 case SYS_ISDBT: 2114 case SYS_DTMB: 2115 fepriv->min_delay = HZ / 20; 2116 fepriv->step_size = fe->ops.info.frequency_stepsize * 2; 2117 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; 2118 break; 2119 default: 2120 /* 2121 * FIXME: This sounds wrong! if freqency_stepsize is 2122 * defined by the frontend, why not use it??? 2123 */ 2124 fepriv->min_delay = HZ / 20; 2125 fepriv->step_size = 0; /* no zigzag */ 2126 fepriv->max_drift = 0; 2127 break; 2128 } 2129 } 2130 if (dvb_override_tune_delay > 0) 2131 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; 2132 2133 fepriv->state = FESTATE_RETUNE; 2134 2135 /* Request the search algorithm to search */ 2136 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 2137 2138 dvb_frontend_clear_events(fe); 2139 dvb_frontend_add_event(fe, 0); 2140 dvb_frontend_wakeup(fe); 2141 fepriv->status = 0; 2142 2143 return 0; 2144 } 2145 2146 2147 static int dvb_frontend_ioctl_legacy(struct file *file, 2148 unsigned int cmd, void *parg) 2149 { 2150 struct dvb_device *dvbdev = file->private_data; 2151 struct dvb_frontend *fe = dvbdev->priv; 2152 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2153 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2154 int err = -EOPNOTSUPP; 2155 2156 switch (cmd) { 2157 case FE_GET_INFO: { 2158 struct dvb_frontend_info* info = parg; 2159 2160 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); 2161 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max); 2162 2163 /* 2164 * Associate the 4 delivery systems supported by DVBv3 2165 * API with their DVBv5 counterpart. For the other standards, 2166 * use the closest type, assuming that it would hopefully 2167 * work with a DVBv3 application. 2168 * It should be noticed that, on multi-frontend devices with 2169 * different types (terrestrial and cable, for example), 2170 * a pure DVBv3 application won't be able to use all delivery 2171 * systems. Yet, changing the DVBv5 cache to the other delivery 2172 * system should be enough for making it work. 2173 */ 2174 switch (dvbv3_type(c->delivery_system)) { 2175 case DVBV3_QPSK: 2176 info->type = FE_QPSK; 2177 break; 2178 case DVBV3_ATSC: 2179 info->type = FE_ATSC; 2180 break; 2181 case DVBV3_QAM: 2182 info->type = FE_QAM; 2183 break; 2184 case DVBV3_OFDM: 2185 info->type = FE_OFDM; 2186 break; 2187 default: 2188 dev_err(fe->dvb->device, 2189 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 2190 __func__, c->delivery_system); 2191 fe->ops.info.type = FE_OFDM; 2192 } 2193 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n", 2194 __func__, c->delivery_system, fe->ops.info.type); 2195 2196 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't 2197 * do it, it is done for it. */ 2198 info->caps |= FE_CAN_INVERSION_AUTO; 2199 err = 0; 2200 break; 2201 } 2202 2203 case FE_READ_STATUS: { 2204 fe_status_t* status = parg; 2205 2206 /* if retune was requested but hasn't occurred yet, prevent 2207 * that user get signal state from previous tuning */ 2208 if (fepriv->state == FESTATE_RETUNE || 2209 fepriv->state == FESTATE_ERROR) { 2210 err=0; 2211 *status = 0; 2212 break; 2213 } 2214 2215 if (fe->ops.read_status) 2216 err = fe->ops.read_status(fe, status); 2217 break; 2218 } 2219 2220 case FE_READ_BER: 2221 if (fe->ops.read_ber) { 2222 if (fepriv->thread) 2223 err = fe->ops.read_ber(fe, (__u32 *) parg); 2224 else 2225 err = -EAGAIN; 2226 } 2227 break; 2228 2229 case FE_READ_SIGNAL_STRENGTH: 2230 if (fe->ops.read_signal_strength) { 2231 if (fepriv->thread) 2232 err = fe->ops.read_signal_strength(fe, (__u16 *) parg); 2233 else 2234 err = -EAGAIN; 2235 } 2236 break; 2237 2238 case FE_READ_SNR: 2239 if (fe->ops.read_snr) { 2240 if (fepriv->thread) 2241 err = fe->ops.read_snr(fe, (__u16 *) parg); 2242 else 2243 err = -EAGAIN; 2244 } 2245 break; 2246 2247 case FE_READ_UNCORRECTED_BLOCKS: 2248 if (fe->ops.read_ucblocks) { 2249 if (fepriv->thread) 2250 err = fe->ops.read_ucblocks(fe, (__u32 *) parg); 2251 else 2252 err = -EAGAIN; 2253 } 2254 break; 2255 2256 case FE_DISEQC_RESET_OVERLOAD: 2257 if (fe->ops.diseqc_reset_overload) { 2258 err = fe->ops.diseqc_reset_overload(fe); 2259 fepriv->state = FESTATE_DISEQC; 2260 fepriv->status = 0; 2261 } 2262 break; 2263 2264 case FE_DISEQC_SEND_MASTER_CMD: 2265 if (fe->ops.diseqc_send_master_cmd) { 2266 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); 2267 fepriv->state = FESTATE_DISEQC; 2268 fepriv->status = 0; 2269 } 2270 break; 2271 2272 case FE_DISEQC_SEND_BURST: 2273 if (fe->ops.diseqc_send_burst) { 2274 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); 2275 fepriv->state = FESTATE_DISEQC; 2276 fepriv->status = 0; 2277 } 2278 break; 2279 2280 case FE_SET_TONE: 2281 if (fe->ops.set_tone) { 2282 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); 2283 fepriv->tone = (fe_sec_tone_mode_t) parg; 2284 fepriv->state = FESTATE_DISEQC; 2285 fepriv->status = 0; 2286 } 2287 break; 2288 2289 case FE_SET_VOLTAGE: 2290 if (fe->ops.set_voltage) { 2291 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); 2292 fepriv->voltage = (fe_sec_voltage_t) parg; 2293 fepriv->state = FESTATE_DISEQC; 2294 fepriv->status = 0; 2295 } 2296 break; 2297 2298 case FE_DISHNETWORK_SEND_LEGACY_CMD: 2299 if (fe->ops.dishnetwork_send_legacy_command) { 2300 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); 2301 fepriv->state = FESTATE_DISEQC; 2302 fepriv->status = 0; 2303 } else if (fe->ops.set_voltage) { 2304 /* 2305 * NOTE: This is a fallback condition. Some frontends 2306 * (stv0299 for instance) take longer than 8msec to 2307 * respond to a set_voltage command. Those switches 2308 * need custom routines to switch properly. For all 2309 * other frontends, the following should work ok. 2310 * Dish network legacy switches (as used by Dish500) 2311 * are controlled by sending 9-bit command words 2312 * spaced 8msec apart. 2313 * the actual command word is switch/port dependent 2314 * so it is up to the userspace application to send 2315 * the right command. 2316 * The command must always start with a '0' after 2317 * initialization, so parg is 8 bits and does not 2318 * include the initialization or start bit 2319 */ 2320 unsigned long swcmd = ((unsigned long) parg) << 1; 2321 struct timeval nexttime; 2322 struct timeval tv[10]; 2323 int i; 2324 u8 last = 1; 2325 if (dvb_frontend_debug) 2326 printk("%s switch command: 0x%04lx\n", __func__, swcmd); 2327 do_gettimeofday(&nexttime); 2328 if (dvb_frontend_debug) 2329 tv[0] = nexttime; 2330 /* before sending a command, initialize by sending 2331 * a 32ms 18V to the switch 2332 */ 2333 fe->ops.set_voltage(fe, SEC_VOLTAGE_18); 2334 dvb_frontend_sleep_until(&nexttime, 32000); 2335 2336 for (i = 0; i < 9; i++) { 2337 if (dvb_frontend_debug) 2338 do_gettimeofday(&tv[i + 1]); 2339 if ((swcmd & 0x01) != last) { 2340 /* set voltage to (last ? 13V : 18V) */ 2341 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); 2342 last = (last) ? 0 : 1; 2343 } 2344 swcmd = swcmd >> 1; 2345 if (i != 8) 2346 dvb_frontend_sleep_until(&nexttime, 8000); 2347 } 2348 if (dvb_frontend_debug) { 2349 printk("%s(%d): switch delay (should be 32k followed by all 8k\n", 2350 __func__, fe->dvb->num); 2351 for (i = 1; i < 10; i++) 2352 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); 2353 } 2354 err = 0; 2355 fepriv->state = FESTATE_DISEQC; 2356 fepriv->status = 0; 2357 } 2358 break; 2359 2360 case FE_DISEQC_RECV_SLAVE_REPLY: 2361 if (fe->ops.diseqc_recv_slave_reply) 2362 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); 2363 break; 2364 2365 case FE_ENABLE_HIGH_LNB_VOLTAGE: 2366 if (fe->ops.enable_high_lnb_voltage) 2367 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); 2368 break; 2369 2370 case FE_SET_FRONTEND: 2371 err = dvbv3_set_delivery_system(fe); 2372 if (err) 2373 break; 2374 2375 err = dtv_property_cache_sync(fe, c, parg); 2376 if (err) 2377 break; 2378 err = dtv_set_frontend(fe); 2379 break; 2380 case FE_GET_EVENT: 2381 err = dvb_frontend_get_event (fe, parg, file->f_flags); 2382 break; 2383 2384 case FE_GET_FRONTEND: 2385 err = dtv_get_frontend(fe, parg); 2386 break; 2387 2388 case FE_SET_FRONTEND_TUNE_MODE: 2389 fepriv->tune_mode_flags = (unsigned long) parg; 2390 err = 0; 2391 break; 2392 } 2393 2394 return err; 2395 } 2396 2397 2398 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) 2399 { 2400 struct dvb_device *dvbdev = file->private_data; 2401 struct dvb_frontend *fe = dvbdev->priv; 2402 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2403 2404 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__); 2405 2406 poll_wait (file, &fepriv->events.wait_queue, wait); 2407 2408 if (fepriv->events.eventw != fepriv->events.eventr) 2409 return (POLLIN | POLLRDNORM | POLLPRI); 2410 2411 return 0; 2412 } 2413 2414 static int dvb_frontend_open(struct inode *inode, struct file *file) 2415 { 2416 struct dvb_device *dvbdev = file->private_data; 2417 struct dvb_frontend *fe = dvbdev->priv; 2418 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2419 struct dvb_adapter *adapter = fe->dvb; 2420 int ret; 2421 2422 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2423 if (fe->exit == DVB_FE_DEVICE_REMOVED) 2424 return -ENODEV; 2425 2426 if (adapter->mfe_shared) { 2427 mutex_lock (&adapter->mfe_lock); 2428 2429 if (adapter->mfe_dvbdev == NULL) 2430 adapter->mfe_dvbdev = dvbdev; 2431 2432 else if (adapter->mfe_dvbdev != dvbdev) { 2433 struct dvb_device 2434 *mfedev = adapter->mfe_dvbdev; 2435 struct dvb_frontend 2436 *mfe = mfedev->priv; 2437 struct dvb_frontend_private 2438 *mfepriv = mfe->frontend_priv; 2439 int mferetry = (dvb_mfe_wait_time << 1); 2440 2441 mutex_unlock (&adapter->mfe_lock); 2442 while (mferetry-- && (mfedev->users != -1 || 2443 mfepriv->thread != NULL)) { 2444 if(msleep_interruptible(500)) { 2445 if(signal_pending(current)) 2446 return -EINTR; 2447 } 2448 } 2449 2450 mutex_lock (&adapter->mfe_lock); 2451 if(adapter->mfe_dvbdev != dvbdev) { 2452 mfedev = adapter->mfe_dvbdev; 2453 mfe = mfedev->priv; 2454 mfepriv = mfe->frontend_priv; 2455 if (mfedev->users != -1 || 2456 mfepriv->thread != NULL) { 2457 mutex_unlock (&adapter->mfe_lock); 2458 return -EBUSY; 2459 } 2460 adapter->mfe_dvbdev = dvbdev; 2461 } 2462 } 2463 } 2464 2465 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { 2466 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) 2467 goto err0; 2468 2469 /* If we took control of the bus, we need to force 2470 reinitialization. This is because many ts_bus_ctrl() 2471 functions strobe the RESET pin on the demod, and if the 2472 frontend thread already exists then the dvb_init() routine 2473 won't get called (which is what usually does initial 2474 register configuration). */ 2475 fepriv->reinitialise = 1; 2476 } 2477 2478 if ((ret = dvb_generic_open (inode, file)) < 0) 2479 goto err1; 2480 2481 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2482 /* normal tune mode when opened R/W */ 2483 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; 2484 fepriv->tone = -1; 2485 fepriv->voltage = -1; 2486 2487 ret = dvb_frontend_start (fe); 2488 if (ret) 2489 goto err2; 2490 2491 /* empty event queue */ 2492 fepriv->events.eventr = fepriv->events.eventw = 0; 2493 } 2494 2495 if (adapter->mfe_shared) 2496 mutex_unlock (&adapter->mfe_lock); 2497 return ret; 2498 2499 err2: 2500 dvb_generic_release(inode, file); 2501 err1: 2502 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) 2503 fe->ops.ts_bus_ctrl(fe, 0); 2504 err0: 2505 if (adapter->mfe_shared) 2506 mutex_unlock (&adapter->mfe_lock); 2507 return ret; 2508 } 2509 2510 static int dvb_frontend_release(struct inode *inode, struct file *file) 2511 { 2512 struct dvb_device *dvbdev = file->private_data; 2513 struct dvb_frontend *fe = dvbdev->priv; 2514 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2515 int ret; 2516 2517 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2518 2519 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2520 fepriv->release_jiffies = jiffies; 2521 mb(); 2522 } 2523 2524 ret = dvb_generic_release (inode, file); 2525 2526 if (dvbdev->users == -1) { 2527 wake_up(&fepriv->wait_queue); 2528 if (fe->exit != DVB_FE_NO_EXIT) 2529 wake_up(&dvbdev->wait_queue); 2530 if (fe->ops.ts_bus_ctrl) 2531 fe->ops.ts_bus_ctrl(fe, 0); 2532 } 2533 2534 return ret; 2535 } 2536 2537 static const struct file_operations dvb_frontend_fops = { 2538 .owner = THIS_MODULE, 2539 .unlocked_ioctl = dvb_generic_ioctl, 2540 .poll = dvb_frontend_poll, 2541 .open = dvb_frontend_open, 2542 .release = dvb_frontend_release, 2543 .llseek = noop_llseek, 2544 }; 2545 2546 int dvb_frontend_suspend(struct dvb_frontend *fe) 2547 { 2548 int ret = 0; 2549 2550 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2551 fe->id); 2552 2553 if (fe->ops.tuner_ops.sleep) 2554 ret = fe->ops.tuner_ops.sleep(fe); 2555 2556 if (fe->ops.sleep) 2557 ret = fe->ops.sleep(fe); 2558 2559 return ret; 2560 } 2561 EXPORT_SYMBOL(dvb_frontend_suspend); 2562 2563 int dvb_frontend_resume(struct dvb_frontend *fe) 2564 { 2565 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2566 int ret = 0; 2567 2568 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2569 fe->id); 2570 2571 fe->exit = DVB_FE_DEVICE_RESUME; 2572 if (fe->ops.init) 2573 ret = fe->ops.init(fe); 2574 2575 if (fe->ops.tuner_ops.init) 2576 ret = fe->ops.tuner_ops.init(fe); 2577 2578 fe->exit = DVB_FE_NO_EXIT; 2579 fepriv->state = FESTATE_RETUNE; 2580 dvb_frontend_wakeup(fe); 2581 2582 return ret; 2583 } 2584 EXPORT_SYMBOL(dvb_frontend_resume); 2585 2586 int dvb_register_frontend(struct dvb_adapter* dvb, 2587 struct dvb_frontend* fe) 2588 { 2589 struct dvb_frontend_private *fepriv; 2590 static const struct dvb_device dvbdev_template = { 2591 .users = ~0, 2592 .writers = 1, 2593 .readers = (~0)-1, 2594 .fops = &dvb_frontend_fops, 2595 .kernel_ioctl = dvb_frontend_ioctl 2596 }; 2597 2598 dev_dbg(dvb->device, "%s:\n", __func__); 2599 2600 if (mutex_lock_interruptible(&frontend_mutex)) 2601 return -ERESTARTSYS; 2602 2603 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); 2604 if (fe->frontend_priv == NULL) { 2605 mutex_unlock(&frontend_mutex); 2606 return -ENOMEM; 2607 } 2608 fepriv = fe->frontend_priv; 2609 2610 sema_init(&fepriv->sem, 1); 2611 init_waitqueue_head (&fepriv->wait_queue); 2612 init_waitqueue_head (&fepriv->events.wait_queue); 2613 mutex_init(&fepriv->events.mtx); 2614 fe->dvb = dvb; 2615 fepriv->inversion = INVERSION_OFF; 2616 2617 dev_info(fe->dvb->device, 2618 "DVB: registering adapter %i frontend %i (%s)...\n", 2619 fe->dvb->num, fe->id, fe->ops.info.name); 2620 2621 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, 2622 fe, DVB_DEVICE_FRONTEND); 2623 2624 /* 2625 * Initialize the cache to the proper values according with the 2626 * first supported delivery system (ops->delsys[0]) 2627 */ 2628 2629 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0]; 2630 dvb_frontend_clear_cache(fe); 2631 2632 mutex_unlock(&frontend_mutex); 2633 return 0; 2634 } 2635 EXPORT_SYMBOL(dvb_register_frontend); 2636 2637 int dvb_unregister_frontend(struct dvb_frontend* fe) 2638 { 2639 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2640 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2641 2642 mutex_lock(&frontend_mutex); 2643 dvb_frontend_stop (fe); 2644 mutex_unlock(&frontend_mutex); 2645 2646 if (fepriv->dvbdev->users < -1) 2647 wait_event(fepriv->dvbdev->wait_queue, 2648 fepriv->dvbdev->users==-1); 2649 2650 mutex_lock(&frontend_mutex); 2651 dvb_unregister_device (fepriv->dvbdev); 2652 2653 /* fe is invalid now */ 2654 kfree(fepriv); 2655 mutex_unlock(&frontend_mutex); 2656 return 0; 2657 } 2658 EXPORT_SYMBOL(dvb_unregister_frontend); 2659 2660 #ifdef CONFIG_MEDIA_ATTACH 2661 void dvb_frontend_detach(struct dvb_frontend* fe) 2662 { 2663 void *ptr; 2664 2665 if (fe->ops.release_sec) { 2666 fe->ops.release_sec(fe); 2667 dvb_detach(fe->ops.release_sec); 2668 } 2669 if (fe->ops.tuner_ops.release) { 2670 fe->ops.tuner_ops.release(fe); 2671 dvb_detach(fe->ops.tuner_ops.release); 2672 } 2673 if (fe->ops.analog_ops.release) { 2674 fe->ops.analog_ops.release(fe); 2675 dvb_detach(fe->ops.analog_ops.release); 2676 } 2677 ptr = (void*)fe->ops.release; 2678 if (ptr) { 2679 fe->ops.release(fe); 2680 dvb_detach(ptr); 2681 } 2682 } 2683 #else 2684 void dvb_frontend_detach(struct dvb_frontend* fe) 2685 { 2686 if (fe->ops.release_sec) 2687 fe->ops.release_sec(fe); 2688 if (fe->ops.tuner_ops.release) 2689 fe->ops.tuner_ops.release(fe); 2690 if (fe->ops.analog_ops.release) 2691 fe->ops.analog_ops.release(fe); 2692 if (fe->ops.release) 2693 fe->ops.release(fe); 2694 } 2695 #endif 2696 EXPORT_SYMBOL(dvb_frontend_detach); 2697