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 #define DVB_FE_NO_EXIT 0 100 #define DVB_FE_NORMAL_EXIT 1 101 #define DVB_FE_DEVICE_REMOVED 2 102 103 static DEFINE_MUTEX(frontend_mutex); 104 105 struct dvb_frontend_private { 106 107 /* thread/frontend values */ 108 struct dvb_device *dvbdev; 109 struct dvb_frontend_parameters parameters_out; 110 struct dvb_fe_events events; 111 struct semaphore sem; 112 struct list_head list_head; 113 wait_queue_head_t wait_queue; 114 struct task_struct *thread; 115 unsigned long release_jiffies; 116 unsigned int exit; 117 unsigned int wakeup; 118 fe_status_t status; 119 unsigned long tune_mode_flags; 120 unsigned int delay; 121 unsigned int reinitialise; 122 int tone; 123 int voltage; 124 125 /* swzigzag values */ 126 unsigned int state; 127 unsigned int bending; 128 int lnb_drift; 129 unsigned int inversion; 130 unsigned int auto_step; 131 unsigned int auto_sub_step; 132 unsigned int started_auto_step; 133 unsigned int min_delay; 134 unsigned int max_drift; 135 unsigned int step_size; 136 int quality; 137 unsigned int check_wrapped; 138 enum dvbfe_search algo_status; 139 }; 140 141 static void dvb_frontend_wakeup(struct dvb_frontend *fe); 142 static int dtv_get_frontend(struct dvb_frontend *fe, 143 struct dvb_frontend_parameters *p_out); 144 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, 145 struct dvb_frontend_parameters *p); 146 147 static bool has_get_frontend(struct dvb_frontend *fe) 148 { 149 return fe->ops.get_frontend != NULL; 150 } 151 152 /* 153 * Due to DVBv3 API calls, a delivery system should be mapped into one of 154 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC), 155 * otherwise, a DVBv3 call will fail. 156 */ 157 enum dvbv3_emulation_type { 158 DVBV3_UNKNOWN, 159 DVBV3_QPSK, 160 DVBV3_QAM, 161 DVBV3_OFDM, 162 DVBV3_ATSC, 163 }; 164 165 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system) 166 { 167 switch (delivery_system) { 168 case SYS_DVBC_ANNEX_A: 169 case SYS_DVBC_ANNEX_C: 170 return DVBV3_QAM; 171 case SYS_DVBS: 172 case SYS_DVBS2: 173 case SYS_TURBO: 174 case SYS_ISDBS: 175 case SYS_DSS: 176 return DVBV3_QPSK; 177 case SYS_DVBT: 178 case SYS_DVBT2: 179 case SYS_ISDBT: 180 case SYS_DTMB: 181 return DVBV3_OFDM; 182 case SYS_ATSC: 183 case SYS_ATSCMH: 184 case SYS_DVBC_ANNEX_B: 185 return DVBV3_ATSC; 186 case SYS_UNDEFINED: 187 case SYS_ISDBC: 188 case SYS_DVBH: 189 case SYS_DAB: 190 default: 191 /* 192 * Doesn't know how to emulate those types and/or 193 * there's no frontend driver from this type yet 194 * with some emulation code, so, we're not sure yet how 195 * to handle them, or they're not compatible with a DVBv3 call. 196 */ 197 return DVBV3_UNKNOWN; 198 } 199 } 200 201 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) 202 { 203 struct dvb_frontend_private *fepriv = fe->frontend_priv; 204 struct dvb_fe_events *events = &fepriv->events; 205 struct dvb_frontend_event *e; 206 int wp; 207 208 dev_dbg(fe->dvb->device, "%s:\n", __func__); 209 210 if ((status & FE_HAS_LOCK) && has_get_frontend(fe)) 211 dtv_get_frontend(fe, &fepriv->parameters_out); 212 213 mutex_lock(&events->mtx); 214 215 wp = (events->eventw + 1) % MAX_EVENT; 216 if (wp == events->eventr) { 217 events->overflow = 1; 218 events->eventr = (events->eventr + 1) % MAX_EVENT; 219 } 220 221 e = &events->events[events->eventw]; 222 e->status = status; 223 e->parameters = fepriv->parameters_out; 224 225 events->eventw = wp; 226 227 mutex_unlock(&events->mtx); 228 229 wake_up_interruptible (&events->wait_queue); 230 } 231 232 static int dvb_frontend_get_event(struct dvb_frontend *fe, 233 struct dvb_frontend_event *event, int flags) 234 { 235 struct dvb_frontend_private *fepriv = fe->frontend_priv; 236 struct dvb_fe_events *events = &fepriv->events; 237 238 dev_dbg(fe->dvb->device, "%s:\n", __func__); 239 240 if (events->overflow) { 241 events->overflow = 0; 242 return -EOVERFLOW; 243 } 244 245 if (events->eventw == events->eventr) { 246 int ret; 247 248 if (flags & O_NONBLOCK) 249 return -EWOULDBLOCK; 250 251 up(&fepriv->sem); 252 253 ret = wait_event_interruptible (events->wait_queue, 254 events->eventw != events->eventr); 255 256 if (down_interruptible (&fepriv->sem)) 257 return -ERESTARTSYS; 258 259 if (ret < 0) 260 return ret; 261 } 262 263 mutex_lock(&events->mtx); 264 *event = events->events[events->eventr]; 265 events->eventr = (events->eventr + 1) % MAX_EVENT; 266 mutex_unlock(&events->mtx); 267 268 return 0; 269 } 270 271 static void dvb_frontend_clear_events(struct dvb_frontend *fe) 272 { 273 struct dvb_frontend_private *fepriv = fe->frontend_priv; 274 struct dvb_fe_events *events = &fepriv->events; 275 276 mutex_lock(&events->mtx); 277 events->eventr = events->eventw; 278 mutex_unlock(&events->mtx); 279 } 280 281 static void dvb_frontend_init(struct dvb_frontend *fe) 282 { 283 dev_dbg(fe->dvb->device, 284 "%s: initialising adapter %i frontend %i (%s)...\n", 285 __func__, fe->dvb->num, fe->id, fe->ops.info.name); 286 287 if (fe->ops.init) 288 fe->ops.init(fe); 289 if (fe->ops.tuner_ops.init) { 290 if (fe->ops.i2c_gate_ctrl) 291 fe->ops.i2c_gate_ctrl(fe, 1); 292 fe->ops.tuner_ops.init(fe); 293 if (fe->ops.i2c_gate_ctrl) 294 fe->ops.i2c_gate_ctrl(fe, 0); 295 } 296 } 297 298 void dvb_frontend_reinitialise(struct dvb_frontend *fe) 299 { 300 struct dvb_frontend_private *fepriv = fe->frontend_priv; 301 302 fepriv->reinitialise = 1; 303 dvb_frontend_wakeup(fe); 304 } 305 EXPORT_SYMBOL(dvb_frontend_reinitialise); 306 307 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) 308 { 309 int q2; 310 struct dvb_frontend *fe = fepriv->dvbdev->priv; 311 312 dev_dbg(fe->dvb->device, "%s:\n", __func__); 313 314 if (locked) 315 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; 316 else 317 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; 318 319 q2 = fepriv->quality - 128; 320 q2 *= q2; 321 322 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); 323 } 324 325 /** 326 * Performs automatic twiddling of frontend parameters. 327 * 328 * @param fe The frontend concerned. 329 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT 330 * @returns Number of complete iterations that have been performed. 331 */ 332 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) 333 { 334 int autoinversion; 335 int ready = 0; 336 int fe_set_err = 0; 337 struct dvb_frontend_private *fepriv = fe->frontend_priv; 338 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 339 int original_inversion = c->inversion; 340 u32 original_frequency = c->frequency; 341 342 /* are we using autoinversion? */ 343 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 344 (c->inversion == INVERSION_AUTO)); 345 346 /* setup parameters correctly */ 347 while(!ready) { 348 /* calculate the lnb_drift */ 349 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; 350 351 /* wrap the auto_step if we've exceeded the maximum drift */ 352 if (fepriv->lnb_drift > fepriv->max_drift) { 353 fepriv->auto_step = 0; 354 fepriv->auto_sub_step = 0; 355 fepriv->lnb_drift = 0; 356 } 357 358 /* perform inversion and +/- zigzag */ 359 switch(fepriv->auto_sub_step) { 360 case 0: 361 /* try with the current inversion and current drift setting */ 362 ready = 1; 363 break; 364 365 case 1: 366 if (!autoinversion) break; 367 368 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 369 ready = 1; 370 break; 371 372 case 2: 373 if (fepriv->lnb_drift == 0) break; 374 375 fepriv->lnb_drift = -fepriv->lnb_drift; 376 ready = 1; 377 break; 378 379 case 3: 380 if (fepriv->lnb_drift == 0) break; 381 if (!autoinversion) break; 382 383 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 384 fepriv->lnb_drift = -fepriv->lnb_drift; 385 ready = 1; 386 break; 387 388 default: 389 fepriv->auto_step++; 390 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ 391 break; 392 } 393 394 if (!ready) fepriv->auto_sub_step++; 395 } 396 397 /* if this attempt would hit where we started, indicate a complete 398 * iteration has occurred */ 399 if ((fepriv->auto_step == fepriv->started_auto_step) && 400 (fepriv->auto_sub_step == 0) && check_wrapped) { 401 return 1; 402 } 403 404 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \ 405 "auto_sub_step:%i started_auto_step:%i\n", 406 __func__, fepriv->lnb_drift, fepriv->inversion, 407 fepriv->auto_step, fepriv->auto_sub_step, 408 fepriv->started_auto_step); 409 410 /* set the frontend itself */ 411 c->frequency += fepriv->lnb_drift; 412 if (autoinversion) 413 c->inversion = fepriv->inversion; 414 tmp = *c; 415 if (fe->ops.set_frontend) 416 fe_set_err = fe->ops.set_frontend(fe); 417 *c = tmp; 418 if (fe_set_err < 0) { 419 fepriv->state = FESTATE_ERROR; 420 return fe_set_err; 421 } 422 423 c->frequency = original_frequency; 424 c->inversion = original_inversion; 425 426 fepriv->auto_sub_step++; 427 return 0; 428 } 429 430 static void dvb_frontend_swzigzag(struct dvb_frontend *fe) 431 { 432 fe_status_t s = 0; 433 int retval = 0; 434 struct dvb_frontend_private *fepriv = fe->frontend_priv; 435 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; 436 437 /* if we've got no parameters, just keep idling */ 438 if (fepriv->state & FESTATE_IDLE) { 439 fepriv->delay = 3*HZ; 440 fepriv->quality = 0; 441 return; 442 } 443 444 /* in SCAN mode, we just set the frontend when asked and leave it alone */ 445 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { 446 if (fepriv->state & FESTATE_RETUNE) { 447 tmp = *c; 448 if (fe->ops.set_frontend) 449 retval = fe->ops.set_frontend(fe); 450 *c = tmp; 451 if (retval < 0) 452 fepriv->state = FESTATE_ERROR; 453 else 454 fepriv->state = FESTATE_TUNED; 455 } 456 fepriv->delay = 3*HZ; 457 fepriv->quality = 0; 458 return; 459 } 460 461 /* get the frontend status */ 462 if (fepriv->state & FESTATE_RETUNE) { 463 s = 0; 464 } else { 465 if (fe->ops.read_status) 466 fe->ops.read_status(fe, &s); 467 if (s != fepriv->status) { 468 dvb_frontend_add_event(fe, s); 469 fepriv->status = s; 470 } 471 } 472 473 /* if we're not tuned, and we have a lock, move to the TUNED state */ 474 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { 475 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 476 fepriv->state = FESTATE_TUNED; 477 478 /* if we're tuned, then we have determined the correct inversion */ 479 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 480 (c->inversion == INVERSION_AUTO)) { 481 c->inversion = fepriv->inversion; 482 } 483 return; 484 } 485 486 /* if we are tuned already, check we're still locked */ 487 if (fepriv->state & FESTATE_TUNED) { 488 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 489 490 /* we're tuned, and the lock is still good... */ 491 if (s & FE_HAS_LOCK) { 492 return; 493 } else { /* if we _WERE_ tuned, but now don't have a lock */ 494 fepriv->state = FESTATE_ZIGZAG_FAST; 495 fepriv->started_auto_step = fepriv->auto_step; 496 fepriv->check_wrapped = 0; 497 } 498 } 499 500 /* don't actually do anything if we're in the LOSTLOCK state, 501 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ 502 if ((fepriv->state & FESTATE_LOSTLOCK) && 503 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { 504 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 505 return; 506 } 507 508 /* don't do anything if we're in the DISEQC state, since this 509 * might be someone with a motorized dish controlled by DISEQC. 510 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ 511 if (fepriv->state & FESTATE_DISEQC) { 512 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 513 return; 514 } 515 516 /* if we're in the RETUNE state, set everything up for a brand 517 * new scan, keeping the current inversion setting, as the next 518 * tune is _very_ likely to require the same */ 519 if (fepriv->state & FESTATE_RETUNE) { 520 fepriv->lnb_drift = 0; 521 fepriv->auto_step = 0; 522 fepriv->auto_sub_step = 0; 523 fepriv->started_auto_step = 0; 524 fepriv->check_wrapped = 0; 525 } 526 527 /* fast zigzag. */ 528 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { 529 fepriv->delay = fepriv->min_delay; 530 531 /* perform a tune */ 532 retval = dvb_frontend_swzigzag_autotune(fe, 533 fepriv->check_wrapped); 534 if (retval < 0) { 535 return; 536 } else if (retval) { 537 /* OK, if we've run out of trials at the fast speed. 538 * Drop back to slow for the _next_ attempt */ 539 fepriv->state = FESTATE_SEARCHING_SLOW; 540 fepriv->started_auto_step = fepriv->auto_step; 541 return; 542 } 543 fepriv->check_wrapped = 1; 544 545 /* if we've just retuned, enter the ZIGZAG_FAST state. 546 * This ensures we cannot return from an 547 * FE_SET_FRONTEND ioctl before the first frontend tune 548 * occurs */ 549 if (fepriv->state & FESTATE_RETUNE) { 550 fepriv->state = FESTATE_TUNING_FAST; 551 } 552 } 553 554 /* slow zigzag */ 555 if (fepriv->state & FESTATE_SEARCHING_SLOW) { 556 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 557 558 /* Note: don't bother checking for wrapping; we stay in this 559 * state until we get a lock */ 560 dvb_frontend_swzigzag_autotune(fe, 0); 561 } 562 } 563 564 static int dvb_frontend_is_exiting(struct dvb_frontend *fe) 565 { 566 struct dvb_frontend_private *fepriv = fe->frontend_priv; 567 568 if (fepriv->exit != DVB_FE_NO_EXIT) 569 return 1; 570 571 if (fepriv->dvbdev->writers == 1) 572 if (time_after_eq(jiffies, fepriv->release_jiffies + 573 dvb_shutdown_timeout * HZ)) 574 return 1; 575 576 return 0; 577 } 578 579 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) 580 { 581 struct dvb_frontend_private *fepriv = fe->frontend_priv; 582 583 if (fepriv->wakeup) { 584 fepriv->wakeup = 0; 585 return 1; 586 } 587 return dvb_frontend_is_exiting(fe); 588 } 589 590 static void dvb_frontend_wakeup(struct dvb_frontend *fe) 591 { 592 struct dvb_frontend_private *fepriv = fe->frontend_priv; 593 594 fepriv->wakeup = 1; 595 wake_up_interruptible(&fepriv->wait_queue); 596 } 597 598 static int dvb_frontend_thread(void *data) 599 { 600 struct dvb_frontend *fe = data; 601 struct dvb_frontend_private *fepriv = fe->frontend_priv; 602 fe_status_t s; 603 enum dvbfe_algo algo; 604 605 bool re_tune = false; 606 607 dev_dbg(fe->dvb->device, "%s:\n", __func__); 608 609 fepriv->check_wrapped = 0; 610 fepriv->quality = 0; 611 fepriv->delay = 3*HZ; 612 fepriv->status = 0; 613 fepriv->wakeup = 0; 614 fepriv->reinitialise = 0; 615 616 dvb_frontend_init(fe); 617 618 set_freezable(); 619 while (1) { 620 up(&fepriv->sem); /* is locked when we enter the thread... */ 621 restart: 622 wait_event_interruptible_timeout(fepriv->wait_queue, 623 dvb_frontend_should_wakeup(fe) || kthread_should_stop() 624 || freezing(current), 625 fepriv->delay); 626 627 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { 628 /* got signal or quitting */ 629 fepriv->exit = DVB_FE_NORMAL_EXIT; 630 break; 631 } 632 633 if (try_to_freeze()) 634 goto restart; 635 636 if (down_interruptible(&fepriv->sem)) 637 break; 638 639 if (fepriv->reinitialise) { 640 dvb_frontend_init(fe); 641 if (fe->ops.set_tone && fepriv->tone != -1) 642 fe->ops.set_tone(fe, fepriv->tone); 643 if (fe->ops.set_voltage && fepriv->voltage != -1) 644 fe->ops.set_voltage(fe, fepriv->voltage); 645 fepriv->reinitialise = 0; 646 } 647 648 /* do an iteration of the tuning loop */ 649 if (fe->ops.get_frontend_algo) { 650 algo = fe->ops.get_frontend_algo(fe); 651 switch (algo) { 652 case DVBFE_ALGO_HW: 653 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); 654 655 if (fepriv->state & FESTATE_RETUNE) { 656 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__); 657 re_tune = true; 658 fepriv->state = FESTATE_TUNED; 659 } else { 660 re_tune = false; 661 } 662 663 if (fe->ops.tune) 664 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s); 665 666 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { 667 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__); 668 dvb_frontend_add_event(fe, s); 669 fepriv->status = s; 670 } 671 break; 672 case DVBFE_ALGO_SW: 673 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); 674 dvb_frontend_swzigzag(fe); 675 break; 676 case DVBFE_ALGO_CUSTOM: 677 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); 678 if (fepriv->state & FESTATE_RETUNE) { 679 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__); 680 fepriv->state = FESTATE_TUNED; 681 } 682 /* Case where we are going to search for a carrier 683 * User asked us to retune again for some reason, possibly 684 * requesting a search with a new set of parameters 685 */ 686 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { 687 if (fe->ops.search) { 688 fepriv->algo_status = fe->ops.search(fe); 689 /* We did do a search as was requested, the flags are 690 * now unset as well and has the flags wrt to search. 691 */ 692 } else { 693 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; 694 } 695 } 696 /* Track the carrier if the search was successful */ 697 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) { 698 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 699 fepriv->delay = HZ / 2; 700 } 701 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); 702 fe->ops.read_status(fe, &s); 703 if (s != fepriv->status) { 704 dvb_frontend_add_event(fe, s); /* update event list */ 705 fepriv->status = s; 706 if (!(s & FE_HAS_LOCK)) { 707 fepriv->delay = HZ / 10; 708 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 709 } else { 710 fepriv->delay = 60 * HZ; 711 } 712 } 713 break; 714 default: 715 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__); 716 break; 717 } 718 } else { 719 dvb_frontend_swzigzag(fe); 720 } 721 } 722 723 if (dvb_powerdown_on_sleep) { 724 if (fe->ops.set_voltage) 725 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); 726 if (fe->ops.tuner_ops.sleep) { 727 if (fe->ops.i2c_gate_ctrl) 728 fe->ops.i2c_gate_ctrl(fe, 1); 729 fe->ops.tuner_ops.sleep(fe); 730 if (fe->ops.i2c_gate_ctrl) 731 fe->ops.i2c_gate_ctrl(fe, 0); 732 } 733 if (fe->ops.sleep) 734 fe->ops.sleep(fe); 735 } 736 737 fepriv->thread = NULL; 738 if (kthread_should_stop()) 739 fepriv->exit = DVB_FE_DEVICE_REMOVED; 740 else 741 fepriv->exit = DVB_FE_NO_EXIT; 742 mb(); 743 744 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 fepriv->exit = DVB_FE_NORMAL_EXIT; 755 mb(); 756 757 if (!fepriv->thread) 758 return; 759 760 kthread_stop(fepriv->thread); 761 762 sema_init(&fepriv->sem, 1); 763 fepriv->state = FESTATE_IDLE; 764 765 /* paranoia check in case a signal arrived */ 766 if (fepriv->thread) 767 dev_warn(fe->dvb->device, 768 "dvb_frontend_stop: warning: thread %p won't exit\n", 769 fepriv->thread); 770 } 771 772 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) 773 { 774 return ((curtime.tv_usec < lasttime.tv_usec) ? 775 1000000 - lasttime.tv_usec + curtime.tv_usec : 776 curtime.tv_usec - lasttime.tv_usec); 777 } 778 EXPORT_SYMBOL(timeval_usec_diff); 779 780 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) 781 { 782 curtime->tv_usec += add_usec; 783 if (curtime->tv_usec >= 1000000) { 784 curtime->tv_usec -= 1000000; 785 curtime->tv_sec++; 786 } 787 } 788 789 /* 790 * Sleep until gettimeofday() > waketime + add_usec 791 * This needs to be as precise as possible, but as the delay is 792 * usually between 2ms and 32ms, it is done using a scheduled msleep 793 * followed by usleep (normally a busy-wait loop) for the remainder 794 */ 795 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) 796 { 797 struct timeval lasttime; 798 s32 delta, newdelta; 799 800 timeval_usec_add(waketime, add_usec); 801 802 do_gettimeofday(&lasttime); 803 delta = timeval_usec_diff(lasttime, *waketime); 804 if (delta > 2500) { 805 msleep((delta - 1500) / 1000); 806 do_gettimeofday(&lasttime); 807 newdelta = timeval_usec_diff(lasttime, *waketime); 808 delta = (newdelta > delta) ? 0 : newdelta; 809 } 810 if (delta > 0) 811 udelay(delta); 812 } 813 EXPORT_SYMBOL(dvb_frontend_sleep_until); 814 815 static int dvb_frontend_start(struct dvb_frontend *fe) 816 { 817 int ret; 818 struct dvb_frontend_private *fepriv = fe->frontend_priv; 819 struct task_struct *fe_thread; 820 821 dev_dbg(fe->dvb->device, "%s:\n", __func__); 822 823 if (fepriv->thread) { 824 if (fepriv->exit == DVB_FE_NO_EXIT) 825 return 0; 826 else 827 dvb_frontend_stop (fe); 828 } 829 830 if (signal_pending(current)) 831 return -EINTR; 832 if (down_interruptible (&fepriv->sem)) 833 return -EINTR; 834 835 fepriv->state = FESTATE_IDLE; 836 fepriv->exit = DVB_FE_NO_EXIT; 837 fepriv->thread = NULL; 838 mb(); 839 840 fe_thread = kthread_run(dvb_frontend_thread, fe, 841 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id); 842 if (IS_ERR(fe_thread)) { 843 ret = PTR_ERR(fe_thread); 844 dev_warn(fe->dvb->device, 845 "dvb_frontend_start: failed to start kthread (%d)\n", 846 ret); 847 up(&fepriv->sem); 848 return ret; 849 } 850 fepriv->thread = fe_thread; 851 return 0; 852 } 853 854 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe, 855 u32 *freq_min, u32 *freq_max) 856 { 857 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min); 858 859 if (fe->ops.info.frequency_max == 0) 860 *freq_max = fe->ops.tuner_ops.info.frequency_max; 861 else if (fe->ops.tuner_ops.info.frequency_max == 0) 862 *freq_max = fe->ops.info.frequency_max; 863 else 864 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max); 865 866 if (*freq_min == 0 || *freq_max == 0) 867 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n", 868 fe->dvb->num, fe->id); 869 } 870 871 static int dvb_frontend_check_parameters(struct dvb_frontend *fe) 872 { 873 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 874 u32 freq_min; 875 u32 freq_max; 876 877 /* range check: frequency */ 878 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max); 879 if ((freq_min && c->frequency < freq_min) || 880 (freq_max && c->frequency > freq_max)) { 881 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n", 882 fe->dvb->num, fe->id, c->frequency, 883 freq_min, freq_max); 884 return -EINVAL; 885 } 886 887 /* range check: symbol rate */ 888 switch (c->delivery_system) { 889 case SYS_DVBS: 890 case SYS_DVBS2: 891 case SYS_TURBO: 892 case SYS_DVBC_ANNEX_A: 893 case SYS_DVBC_ANNEX_C: 894 if ((fe->ops.info.symbol_rate_min && 895 c->symbol_rate < fe->ops.info.symbol_rate_min) || 896 (fe->ops.info.symbol_rate_max && 897 c->symbol_rate > fe->ops.info.symbol_rate_max)) { 898 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", 899 fe->dvb->num, fe->id, c->symbol_rate, 900 fe->ops.info.symbol_rate_min, 901 fe->ops.info.symbol_rate_max); 902 return -EINVAL; 903 } 904 default: 905 break; 906 } 907 908 return 0; 909 } 910 911 static int dvb_frontend_clear_cache(struct dvb_frontend *fe) 912 { 913 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 914 int i; 915 u32 delsys; 916 917 delsys = c->delivery_system; 918 memset(c, 0, sizeof(struct dtv_frontend_properties)); 919 c->delivery_system = delsys; 920 921 c->state = DTV_CLEAR; 922 923 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n", 924 __func__, c->delivery_system); 925 926 c->transmission_mode = TRANSMISSION_MODE_AUTO; 927 c->bandwidth_hz = 0; /* AUTO */ 928 c->guard_interval = GUARD_INTERVAL_AUTO; 929 c->hierarchy = HIERARCHY_AUTO; 930 c->symbol_rate = 0; 931 c->code_rate_HP = FEC_AUTO; 932 c->code_rate_LP = FEC_AUTO; 933 c->fec_inner = FEC_AUTO; 934 c->rolloff = ROLLOFF_AUTO; 935 c->voltage = SEC_VOLTAGE_OFF; 936 c->sectone = SEC_TONE_OFF; 937 c->pilot = PILOT_AUTO; 938 939 c->isdbt_partial_reception = 0; 940 c->isdbt_sb_mode = 0; 941 c->isdbt_sb_subchannel = 0; 942 c->isdbt_sb_segment_idx = 0; 943 c->isdbt_sb_segment_count = 0; 944 c->isdbt_layer_enabled = 0; 945 for (i = 0; i < 3; i++) { 946 c->layer[i].fec = FEC_AUTO; 947 c->layer[i].modulation = QAM_AUTO; 948 c->layer[i].interleaving = 0; 949 c->layer[i].segment_count = 0; 950 } 951 952 c->stream_id = NO_STREAM_ID_FILTER; 953 954 switch (c->delivery_system) { 955 case SYS_DVBS: 956 case SYS_DVBS2: 957 case SYS_TURBO: 958 c->modulation = QPSK; /* implied for DVB-S in legacy API */ 959 c->rolloff = ROLLOFF_35;/* implied for DVB-S */ 960 break; 961 case SYS_ATSC: 962 c->modulation = VSB_8; 963 break; 964 default: 965 c->modulation = QAM_AUTO; 966 break; 967 } 968 969 c->lna = LNA_AUTO; 970 971 return 0; 972 } 973 974 #define _DTV_CMD(n, s, b) \ 975 [n] = { \ 976 .name = #n, \ 977 .cmd = n, \ 978 .set = s,\ 979 .buffer = b \ 980 } 981 982 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = { 983 _DTV_CMD(DTV_TUNE, 1, 0), 984 _DTV_CMD(DTV_CLEAR, 1, 0), 985 986 /* Set */ 987 _DTV_CMD(DTV_FREQUENCY, 1, 0), 988 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), 989 _DTV_CMD(DTV_MODULATION, 1, 0), 990 _DTV_CMD(DTV_INVERSION, 1, 0), 991 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), 992 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), 993 _DTV_CMD(DTV_INNER_FEC, 1, 0), 994 _DTV_CMD(DTV_VOLTAGE, 1, 0), 995 _DTV_CMD(DTV_TONE, 1, 0), 996 _DTV_CMD(DTV_PILOT, 1, 0), 997 _DTV_CMD(DTV_ROLLOFF, 1, 0), 998 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), 999 _DTV_CMD(DTV_HIERARCHY, 1, 0), 1000 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), 1001 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), 1002 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), 1003 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), 1004 _DTV_CMD(DTV_INTERLEAVING, 1, 0), 1005 1006 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), 1007 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), 1008 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), 1009 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), 1010 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), 1011 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), 1012 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), 1013 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), 1014 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), 1015 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), 1016 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), 1017 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), 1018 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), 1019 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), 1020 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), 1021 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), 1022 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), 1023 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), 1024 1025 _DTV_CMD(DTV_STREAM_ID, 1, 0), 1026 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0), 1027 _DTV_CMD(DTV_LNA, 1, 0), 1028 1029 /* Get */ 1030 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), 1031 _DTV_CMD(DTV_API_VERSION, 0, 0), 1032 1033 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0), 1034 1035 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0), 1036 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0), 1037 1038 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0), 1039 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0), 1040 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0), 1041 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0), 1042 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0), 1043 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0), 1044 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0), 1045 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0), 1046 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0), 1047 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0), 1048 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0), 1049 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0), 1050 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0), 1051 }; 1052 1053 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp) 1054 { 1055 int i; 1056 1057 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) { 1058 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n", 1059 __func__, tvp->cmd); 1060 return; 1061 } 1062 1063 dev_dbg(fe->dvb->device, "%s: tvp.cmd = 0x%08x (%s)\n", __func__, 1064 tvp->cmd, dtv_cmds[tvp->cmd].name); 1065 1066 if (dtv_cmds[tvp->cmd].buffer) { 1067 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n", 1068 __func__, tvp->u.buffer.len); 1069 1070 for(i = 0; i < tvp->u.buffer.len; i++) 1071 dev_dbg(fe->dvb->device, 1072 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n", 1073 __func__, i, tvp->u.buffer.data[i]); 1074 } else { 1075 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__, 1076 tvp->u.data); 1077 } 1078 } 1079 1080 /* Synchronise the legacy tuning parameters into the cache, so that demodulator 1081 * drivers can use a single set_frontend tuning function, regardless of whether 1082 * it's being used for the legacy or new API, reducing code and complexity. 1083 */ 1084 static int dtv_property_cache_sync(struct dvb_frontend *fe, 1085 struct dtv_frontend_properties *c, 1086 const struct dvb_frontend_parameters *p) 1087 { 1088 c->frequency = p->frequency; 1089 c->inversion = p->inversion; 1090 1091 switch (dvbv3_type(c->delivery_system)) { 1092 case DVBV3_QPSK: 1093 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1094 c->symbol_rate = p->u.qpsk.symbol_rate; 1095 c->fec_inner = p->u.qpsk.fec_inner; 1096 break; 1097 case DVBV3_QAM: 1098 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1099 c->symbol_rate = p->u.qam.symbol_rate; 1100 c->fec_inner = p->u.qam.fec_inner; 1101 c->modulation = p->u.qam.modulation; 1102 break; 1103 case DVBV3_OFDM: 1104 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1105 1106 switch (p->u.ofdm.bandwidth) { 1107 case BANDWIDTH_10_MHZ: 1108 c->bandwidth_hz = 10000000; 1109 break; 1110 case BANDWIDTH_8_MHZ: 1111 c->bandwidth_hz = 8000000; 1112 break; 1113 case BANDWIDTH_7_MHZ: 1114 c->bandwidth_hz = 7000000; 1115 break; 1116 case BANDWIDTH_6_MHZ: 1117 c->bandwidth_hz = 6000000; 1118 break; 1119 case BANDWIDTH_5_MHZ: 1120 c->bandwidth_hz = 5000000; 1121 break; 1122 case BANDWIDTH_1_712_MHZ: 1123 c->bandwidth_hz = 1712000; 1124 break; 1125 case BANDWIDTH_AUTO: 1126 c->bandwidth_hz = 0; 1127 } 1128 1129 c->code_rate_HP = p->u.ofdm.code_rate_HP; 1130 c->code_rate_LP = p->u.ofdm.code_rate_LP; 1131 c->modulation = p->u.ofdm.constellation; 1132 c->transmission_mode = p->u.ofdm.transmission_mode; 1133 c->guard_interval = p->u.ofdm.guard_interval; 1134 c->hierarchy = p->u.ofdm.hierarchy_information; 1135 break; 1136 case DVBV3_ATSC: 1137 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__); 1138 c->modulation = p->u.vsb.modulation; 1139 if (c->delivery_system == SYS_ATSCMH) 1140 break; 1141 if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) 1142 c->delivery_system = SYS_ATSC; 1143 else 1144 c->delivery_system = SYS_DVBC_ANNEX_B; 1145 break; 1146 case DVBV3_UNKNOWN: 1147 dev_err(fe->dvb->device, 1148 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1149 __func__, c->delivery_system); 1150 return -EINVAL; 1151 } 1152 1153 return 0; 1154 } 1155 1156 /* Ensure the cached values are set correctly in the frontend 1157 * legacy tuning structures, for the advanced tuning API. 1158 */ 1159 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, 1160 struct dvb_frontend_parameters *p) 1161 { 1162 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1163 1164 p->frequency = c->frequency; 1165 p->inversion = c->inversion; 1166 1167 switch (dvbv3_type(c->delivery_system)) { 1168 case DVBV3_UNKNOWN: 1169 dev_err(fe->dvb->device, 1170 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 1171 __func__, c->delivery_system); 1172 return -EINVAL; 1173 case DVBV3_QPSK: 1174 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); 1175 p->u.qpsk.symbol_rate = c->symbol_rate; 1176 p->u.qpsk.fec_inner = c->fec_inner; 1177 break; 1178 case DVBV3_QAM: 1179 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); 1180 p->u.qam.symbol_rate = c->symbol_rate; 1181 p->u.qam.fec_inner = c->fec_inner; 1182 p->u.qam.modulation = c->modulation; 1183 break; 1184 case DVBV3_OFDM: 1185 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); 1186 switch (c->bandwidth_hz) { 1187 case 10000000: 1188 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ; 1189 break; 1190 case 8000000: 1191 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1192 break; 1193 case 7000000: 1194 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1195 break; 1196 case 6000000: 1197 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1198 break; 1199 case 5000000: 1200 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ; 1201 break; 1202 case 1712000: 1203 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ; 1204 break; 1205 case 0: 1206 default: 1207 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1208 } 1209 p->u.ofdm.code_rate_HP = c->code_rate_HP; 1210 p->u.ofdm.code_rate_LP = c->code_rate_LP; 1211 p->u.ofdm.constellation = c->modulation; 1212 p->u.ofdm.transmission_mode = c->transmission_mode; 1213 p->u.ofdm.guard_interval = c->guard_interval; 1214 p->u.ofdm.hierarchy_information = c->hierarchy; 1215 break; 1216 case DVBV3_ATSC: 1217 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__); 1218 p->u.vsb.modulation = c->modulation; 1219 break; 1220 } 1221 return 0; 1222 } 1223 1224 /** 1225 * dtv_get_frontend - calls a callback for retrieving DTV parameters 1226 * @fe: struct dvb_frontend pointer 1227 * @c: struct dtv_frontend_properties pointer (DVBv5 cache) 1228 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct) 1229 * 1230 * This routine calls either the DVBv3 or DVBv5 get_frontend call. 1231 * If c is not null, it will update the DVBv5 cache struct pointed by it. 1232 * If p_out is not null, it will update the DVBv3 params pointed by it. 1233 */ 1234 static int dtv_get_frontend(struct dvb_frontend *fe, 1235 struct dvb_frontend_parameters *p_out) 1236 { 1237 int r; 1238 1239 if (fe->ops.get_frontend) { 1240 r = fe->ops.get_frontend(fe); 1241 if (unlikely(r < 0)) 1242 return r; 1243 if (p_out) 1244 dtv_property_legacy_params_sync(fe, p_out); 1245 return 0; 1246 } 1247 1248 /* As everything is in cache, get_frontend fops are always supported */ 1249 return 0; 1250 } 1251 1252 static int dvb_frontend_ioctl_legacy(struct file *file, 1253 unsigned int cmd, void *parg); 1254 static int dvb_frontend_ioctl_properties(struct file *file, 1255 unsigned int cmd, void *parg); 1256 1257 static int dtv_property_process_get(struct dvb_frontend *fe, 1258 const struct dtv_frontend_properties *c, 1259 struct dtv_property *tvp, 1260 struct file *file) 1261 { 1262 int r, ncaps; 1263 1264 switch(tvp->cmd) { 1265 case DTV_ENUM_DELSYS: 1266 ncaps = 0; 1267 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { 1268 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps]; 1269 ncaps++; 1270 } 1271 tvp->u.buffer.len = ncaps; 1272 break; 1273 case DTV_FREQUENCY: 1274 tvp->u.data = c->frequency; 1275 break; 1276 case DTV_MODULATION: 1277 tvp->u.data = c->modulation; 1278 break; 1279 case DTV_BANDWIDTH_HZ: 1280 tvp->u.data = c->bandwidth_hz; 1281 break; 1282 case DTV_INVERSION: 1283 tvp->u.data = c->inversion; 1284 break; 1285 case DTV_SYMBOL_RATE: 1286 tvp->u.data = c->symbol_rate; 1287 break; 1288 case DTV_INNER_FEC: 1289 tvp->u.data = c->fec_inner; 1290 break; 1291 case DTV_PILOT: 1292 tvp->u.data = c->pilot; 1293 break; 1294 case DTV_ROLLOFF: 1295 tvp->u.data = c->rolloff; 1296 break; 1297 case DTV_DELIVERY_SYSTEM: 1298 tvp->u.data = c->delivery_system; 1299 break; 1300 case DTV_VOLTAGE: 1301 tvp->u.data = c->voltage; 1302 break; 1303 case DTV_TONE: 1304 tvp->u.data = c->sectone; 1305 break; 1306 case DTV_API_VERSION: 1307 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; 1308 break; 1309 case DTV_CODE_RATE_HP: 1310 tvp->u.data = c->code_rate_HP; 1311 break; 1312 case DTV_CODE_RATE_LP: 1313 tvp->u.data = c->code_rate_LP; 1314 break; 1315 case DTV_GUARD_INTERVAL: 1316 tvp->u.data = c->guard_interval; 1317 break; 1318 case DTV_TRANSMISSION_MODE: 1319 tvp->u.data = c->transmission_mode; 1320 break; 1321 case DTV_HIERARCHY: 1322 tvp->u.data = c->hierarchy; 1323 break; 1324 case DTV_INTERLEAVING: 1325 tvp->u.data = c->interleaving; 1326 break; 1327 1328 /* ISDB-T Support here */ 1329 case DTV_ISDBT_PARTIAL_RECEPTION: 1330 tvp->u.data = c->isdbt_partial_reception; 1331 break; 1332 case DTV_ISDBT_SOUND_BROADCASTING: 1333 tvp->u.data = c->isdbt_sb_mode; 1334 break; 1335 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1336 tvp->u.data = c->isdbt_sb_subchannel; 1337 break; 1338 case DTV_ISDBT_SB_SEGMENT_IDX: 1339 tvp->u.data = c->isdbt_sb_segment_idx; 1340 break; 1341 case DTV_ISDBT_SB_SEGMENT_COUNT: 1342 tvp->u.data = c->isdbt_sb_segment_count; 1343 break; 1344 case DTV_ISDBT_LAYER_ENABLED: 1345 tvp->u.data = c->isdbt_layer_enabled; 1346 break; 1347 case DTV_ISDBT_LAYERA_FEC: 1348 tvp->u.data = c->layer[0].fec; 1349 break; 1350 case DTV_ISDBT_LAYERA_MODULATION: 1351 tvp->u.data = c->layer[0].modulation; 1352 break; 1353 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1354 tvp->u.data = c->layer[0].segment_count; 1355 break; 1356 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1357 tvp->u.data = c->layer[0].interleaving; 1358 break; 1359 case DTV_ISDBT_LAYERB_FEC: 1360 tvp->u.data = c->layer[1].fec; 1361 break; 1362 case DTV_ISDBT_LAYERB_MODULATION: 1363 tvp->u.data = c->layer[1].modulation; 1364 break; 1365 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1366 tvp->u.data = c->layer[1].segment_count; 1367 break; 1368 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1369 tvp->u.data = c->layer[1].interleaving; 1370 break; 1371 case DTV_ISDBT_LAYERC_FEC: 1372 tvp->u.data = c->layer[2].fec; 1373 break; 1374 case DTV_ISDBT_LAYERC_MODULATION: 1375 tvp->u.data = c->layer[2].modulation; 1376 break; 1377 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1378 tvp->u.data = c->layer[2].segment_count; 1379 break; 1380 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1381 tvp->u.data = c->layer[2].interleaving; 1382 break; 1383 1384 /* Multistream support */ 1385 case DTV_STREAM_ID: 1386 case DTV_DVBT2_PLP_ID_LEGACY: 1387 tvp->u.data = c->stream_id; 1388 break; 1389 1390 /* ATSC-MH */ 1391 case DTV_ATSCMH_FIC_VER: 1392 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver; 1393 break; 1394 case DTV_ATSCMH_PARADE_ID: 1395 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id; 1396 break; 1397 case DTV_ATSCMH_NOG: 1398 tvp->u.data = fe->dtv_property_cache.atscmh_nog; 1399 break; 1400 case DTV_ATSCMH_TNOG: 1401 tvp->u.data = fe->dtv_property_cache.atscmh_tnog; 1402 break; 1403 case DTV_ATSCMH_SGN: 1404 tvp->u.data = fe->dtv_property_cache.atscmh_sgn; 1405 break; 1406 case DTV_ATSCMH_PRC: 1407 tvp->u.data = fe->dtv_property_cache.atscmh_prc; 1408 break; 1409 case DTV_ATSCMH_RS_FRAME_MODE: 1410 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode; 1411 break; 1412 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1413 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble; 1414 break; 1415 case DTV_ATSCMH_RS_CODE_MODE_PRI: 1416 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri; 1417 break; 1418 case DTV_ATSCMH_RS_CODE_MODE_SEC: 1419 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec; 1420 break; 1421 case DTV_ATSCMH_SCCC_BLOCK_MODE: 1422 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode; 1423 break; 1424 case DTV_ATSCMH_SCCC_CODE_MODE_A: 1425 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a; 1426 break; 1427 case DTV_ATSCMH_SCCC_CODE_MODE_B: 1428 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b; 1429 break; 1430 case DTV_ATSCMH_SCCC_CODE_MODE_C: 1431 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c; 1432 break; 1433 case DTV_ATSCMH_SCCC_CODE_MODE_D: 1434 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d; 1435 break; 1436 1437 case DTV_LNA: 1438 tvp->u.data = c->lna; 1439 break; 1440 1441 default: 1442 return -EINVAL; 1443 } 1444 1445 /* Allow the frontend to override outgoing properties */ 1446 if (fe->ops.get_property) { 1447 r = fe->ops.get_property(fe, tvp); 1448 if (r < 0) 1449 return r; 1450 } 1451 1452 dtv_property_dump(fe, tvp); 1453 1454 return 0; 1455 } 1456 1457 static int dtv_set_frontend(struct dvb_frontend *fe); 1458 1459 static bool is_dvbv3_delsys(u32 delsys) 1460 { 1461 bool status; 1462 1463 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) || 1464 (delsys == SYS_DVBS) || (delsys == SYS_ATSC); 1465 1466 return status; 1467 } 1468 1469 static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system) 1470 { 1471 int ncaps, i; 1472 u32 delsys = SYS_UNDEFINED; 1473 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1474 enum dvbv3_emulation_type type; 1475 1476 /* 1477 * It was reported that some old DVBv5 applications were 1478 * filling delivery_system with SYS_UNDEFINED. If this happens, 1479 * assume that the application wants to use the first supported 1480 * delivery system. 1481 */ 1482 if (c->delivery_system == SYS_UNDEFINED) 1483 c->delivery_system = fe->ops.delsys[0]; 1484 1485 if (desired_system == SYS_UNDEFINED) { 1486 /* 1487 * A DVBv3 call doesn't know what's the desired system. 1488 * Also, DVBv3 applications don't know that ops.info->type 1489 * could be changed, and they simply dies when it doesn't 1490 * match. 1491 * So, don't change the current delivery system, as it 1492 * may be trying to do the wrong thing, like setting an 1493 * ISDB-T frontend as DVB-T. Instead, find the closest 1494 * DVBv3 system that matches the delivery system. 1495 */ 1496 if (is_dvbv3_delsys(c->delivery_system)) { 1497 dev_dbg(fe->dvb->device, 1498 "%s: Using delivery system to %d\n", 1499 __func__, c->delivery_system); 1500 return 0; 1501 } 1502 type = dvbv3_type(c->delivery_system); 1503 switch (type) { 1504 case DVBV3_QPSK: 1505 desired_system = SYS_DVBS; 1506 break; 1507 case DVBV3_QAM: 1508 desired_system = SYS_DVBC_ANNEX_A; 1509 break; 1510 case DVBV3_ATSC: 1511 desired_system = SYS_ATSC; 1512 break; 1513 case DVBV3_OFDM: 1514 desired_system = SYS_DVBT; 1515 break; 1516 default: 1517 dev_dbg(fe->dvb->device, "%s: This frontend doesn't support DVBv3 calls\n", 1518 __func__); 1519 return -EINVAL; 1520 } 1521 /* 1522 * Get a delivery system that is compatible with DVBv3 1523 * NOTE: in order for this to work with softwares like Kaffeine that 1524 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to 1525 * DVB-S, drivers that support both should put the SYS_DVBS entry 1526 * before the SYS_DVBS2, otherwise it won't switch back to DVB-S. 1527 * The real fix is that userspace applications should not use DVBv3 1528 * and not trust on calling FE_SET_FRONTEND to switch the delivery 1529 * system. 1530 */ 1531 ncaps = 0; 1532 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { 1533 if (fe->ops.delsys[ncaps] == desired_system) { 1534 delsys = desired_system; 1535 break; 1536 } 1537 ncaps++; 1538 } 1539 if (delsys == SYS_UNDEFINED) { 1540 dev_dbg(fe->dvb->device, "%s: Couldn't find a delivery system that matches %d\n", 1541 __func__, desired_system); 1542 } 1543 } else { 1544 /* 1545 * This is a DVBv5 call. So, it likely knows the supported 1546 * delivery systems. 1547 */ 1548 1549 /* Check if the desired delivery system is supported */ 1550 ncaps = 0; 1551 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { 1552 if (fe->ops.delsys[ncaps] == desired_system) { 1553 c->delivery_system = desired_system; 1554 dev_dbg(fe->dvb->device, 1555 "%s: Changing delivery system to %d\n", 1556 __func__, desired_system); 1557 return 0; 1558 } 1559 ncaps++; 1560 } 1561 type = dvbv3_type(desired_system); 1562 1563 /* 1564 * The delivery system is not supported. See if it can be 1565 * emulated. 1566 * The emulation only works if the desired system is one of the 1567 * DVBv3 delivery systems 1568 */ 1569 if (!is_dvbv3_delsys(desired_system)) { 1570 dev_dbg(fe->dvb->device, 1571 "%s: can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n", 1572 __func__); 1573 return -EINVAL; 1574 } 1575 1576 /* 1577 * Get the last non-DVBv3 delivery system that has the same type 1578 * of the desired system 1579 */ 1580 ncaps = 0; 1581 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { 1582 if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) && 1583 !is_dvbv3_delsys(fe->ops.delsys[ncaps])) 1584 delsys = fe->ops.delsys[ncaps]; 1585 ncaps++; 1586 } 1587 /* There's nothing compatible with the desired delivery system */ 1588 if (delsys == SYS_UNDEFINED) { 1589 dev_dbg(fe->dvb->device, 1590 "%s: Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n", 1591 __func__); 1592 return -EINVAL; 1593 } 1594 } 1595 1596 c->delivery_system = delsys; 1597 1598 /* 1599 * The DVBv3 or DVBv5 call is requesting a different system. So, 1600 * emulation is needed. 1601 * 1602 * Emulate newer delivery systems like ISDBT, DVBT and DTMB 1603 * for older DVBv5 applications. The emulation will try to use 1604 * the auto mode for most things, and will assume that the desired 1605 * delivery system is the last one at the ops.delsys[] array 1606 */ 1607 dev_dbg(fe->dvb->device, 1608 "%s: Using delivery system %d emulated as if it were a %d\n", 1609 __func__, delsys, desired_system); 1610 1611 /* 1612 * For now, handles ISDB-T calls. More code may be needed here for the 1613 * other emulated stuff 1614 */ 1615 if (type == DVBV3_OFDM) { 1616 if (c->delivery_system == SYS_ISDBT) { 1617 dev_dbg(fe->dvb->device, 1618 "%s: Using defaults for SYS_ISDBT\n", 1619 __func__); 1620 1621 if (!c->bandwidth_hz) 1622 c->bandwidth_hz = 6000000; 1623 1624 c->isdbt_partial_reception = 0; 1625 c->isdbt_sb_mode = 0; 1626 c->isdbt_sb_subchannel = 0; 1627 c->isdbt_sb_segment_idx = 0; 1628 c->isdbt_sb_segment_count = 0; 1629 c->isdbt_layer_enabled = 0; 1630 for (i = 0; i < 3; i++) { 1631 c->layer[i].fec = FEC_AUTO; 1632 c->layer[i].modulation = QAM_AUTO; 1633 c->layer[i].interleaving = 0; 1634 c->layer[i].segment_count = 0; 1635 } 1636 } 1637 } 1638 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n", 1639 __func__, c->delivery_system); 1640 1641 return 0; 1642 } 1643 1644 static int dtv_property_process_set(struct dvb_frontend *fe, 1645 struct dtv_property *tvp, 1646 struct file *file) 1647 { 1648 int r = 0; 1649 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1650 1651 /* Allow the frontend to validate incoming properties */ 1652 if (fe->ops.set_property) { 1653 r = fe->ops.set_property(fe, tvp); 1654 if (r < 0) 1655 return r; 1656 } 1657 1658 switch(tvp->cmd) { 1659 case DTV_CLEAR: 1660 /* 1661 * Reset a cache of data specific to the frontend here. This does 1662 * not effect hardware. 1663 */ 1664 dvb_frontend_clear_cache(fe); 1665 break; 1666 case DTV_TUNE: 1667 /* interpret the cache of data, build either a traditional frontend 1668 * tunerequest so we can pass validation in the FE_SET_FRONTEND 1669 * ioctl. 1670 */ 1671 c->state = tvp->cmd; 1672 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n", 1673 __func__); 1674 1675 r = dtv_set_frontend(fe); 1676 break; 1677 case DTV_FREQUENCY: 1678 c->frequency = tvp->u.data; 1679 break; 1680 case DTV_MODULATION: 1681 c->modulation = tvp->u.data; 1682 break; 1683 case DTV_BANDWIDTH_HZ: 1684 c->bandwidth_hz = tvp->u.data; 1685 break; 1686 case DTV_INVERSION: 1687 c->inversion = tvp->u.data; 1688 break; 1689 case DTV_SYMBOL_RATE: 1690 c->symbol_rate = tvp->u.data; 1691 break; 1692 case DTV_INNER_FEC: 1693 c->fec_inner = tvp->u.data; 1694 break; 1695 case DTV_PILOT: 1696 c->pilot = tvp->u.data; 1697 break; 1698 case DTV_ROLLOFF: 1699 c->rolloff = tvp->u.data; 1700 break; 1701 case DTV_DELIVERY_SYSTEM: 1702 r = set_delivery_system(fe, tvp->u.data); 1703 break; 1704 case DTV_VOLTAGE: 1705 c->voltage = tvp->u.data; 1706 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE, 1707 (void *)c->voltage); 1708 break; 1709 case DTV_TONE: 1710 c->sectone = tvp->u.data; 1711 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE, 1712 (void *)c->sectone); 1713 break; 1714 case DTV_CODE_RATE_HP: 1715 c->code_rate_HP = tvp->u.data; 1716 break; 1717 case DTV_CODE_RATE_LP: 1718 c->code_rate_LP = tvp->u.data; 1719 break; 1720 case DTV_GUARD_INTERVAL: 1721 c->guard_interval = tvp->u.data; 1722 break; 1723 case DTV_TRANSMISSION_MODE: 1724 c->transmission_mode = tvp->u.data; 1725 break; 1726 case DTV_HIERARCHY: 1727 c->hierarchy = tvp->u.data; 1728 break; 1729 case DTV_INTERLEAVING: 1730 c->interleaving = tvp->u.data; 1731 break; 1732 1733 /* ISDB-T Support here */ 1734 case DTV_ISDBT_PARTIAL_RECEPTION: 1735 c->isdbt_partial_reception = tvp->u.data; 1736 break; 1737 case DTV_ISDBT_SOUND_BROADCASTING: 1738 c->isdbt_sb_mode = tvp->u.data; 1739 break; 1740 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1741 c->isdbt_sb_subchannel = tvp->u.data; 1742 break; 1743 case DTV_ISDBT_SB_SEGMENT_IDX: 1744 c->isdbt_sb_segment_idx = tvp->u.data; 1745 break; 1746 case DTV_ISDBT_SB_SEGMENT_COUNT: 1747 c->isdbt_sb_segment_count = tvp->u.data; 1748 break; 1749 case DTV_ISDBT_LAYER_ENABLED: 1750 c->isdbt_layer_enabled = tvp->u.data; 1751 break; 1752 case DTV_ISDBT_LAYERA_FEC: 1753 c->layer[0].fec = tvp->u.data; 1754 break; 1755 case DTV_ISDBT_LAYERA_MODULATION: 1756 c->layer[0].modulation = tvp->u.data; 1757 break; 1758 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1759 c->layer[0].segment_count = tvp->u.data; 1760 break; 1761 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1762 c->layer[0].interleaving = tvp->u.data; 1763 break; 1764 case DTV_ISDBT_LAYERB_FEC: 1765 c->layer[1].fec = tvp->u.data; 1766 break; 1767 case DTV_ISDBT_LAYERB_MODULATION: 1768 c->layer[1].modulation = tvp->u.data; 1769 break; 1770 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1771 c->layer[1].segment_count = tvp->u.data; 1772 break; 1773 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1774 c->layer[1].interleaving = tvp->u.data; 1775 break; 1776 case DTV_ISDBT_LAYERC_FEC: 1777 c->layer[2].fec = tvp->u.data; 1778 break; 1779 case DTV_ISDBT_LAYERC_MODULATION: 1780 c->layer[2].modulation = tvp->u.data; 1781 break; 1782 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1783 c->layer[2].segment_count = tvp->u.data; 1784 break; 1785 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1786 c->layer[2].interleaving = tvp->u.data; 1787 break; 1788 1789 /* Multistream support */ 1790 case DTV_STREAM_ID: 1791 case DTV_DVBT2_PLP_ID_LEGACY: 1792 c->stream_id = tvp->u.data; 1793 break; 1794 1795 /* ATSC-MH */ 1796 case DTV_ATSCMH_PARADE_ID: 1797 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data; 1798 break; 1799 case DTV_ATSCMH_RS_FRAME_ENSEMBLE: 1800 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data; 1801 break; 1802 1803 case DTV_LNA: 1804 c->lna = tvp->u.data; 1805 if (fe->ops.set_lna) 1806 r = fe->ops.set_lna(fe); 1807 break; 1808 1809 default: 1810 return -EINVAL; 1811 } 1812 1813 return r; 1814 } 1815 1816 static int dvb_frontend_ioctl(struct file *file, 1817 unsigned int cmd, void *parg) 1818 { 1819 struct dvb_device *dvbdev = file->private_data; 1820 struct dvb_frontend *fe = dvbdev->priv; 1821 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1822 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1823 int err = -EOPNOTSUPP; 1824 1825 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd)); 1826 if (fepriv->exit != DVB_FE_NO_EXIT) 1827 return -ENODEV; 1828 1829 if ((file->f_flags & O_ACCMODE) == O_RDONLY && 1830 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || 1831 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) 1832 return -EPERM; 1833 1834 if (down_interruptible (&fepriv->sem)) 1835 return -ERESTARTSYS; 1836 1837 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY)) 1838 err = dvb_frontend_ioctl_properties(file, cmd, parg); 1839 else { 1840 c->state = DTV_UNDEFINED; 1841 err = dvb_frontend_ioctl_legacy(file, cmd, parg); 1842 } 1843 1844 up(&fepriv->sem); 1845 return err; 1846 } 1847 1848 static int dvb_frontend_ioctl_properties(struct file *file, 1849 unsigned int cmd, void *parg) 1850 { 1851 struct dvb_device *dvbdev = file->private_data; 1852 struct dvb_frontend *fe = dvbdev->priv; 1853 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1854 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1855 int err = 0; 1856 1857 struct dtv_properties *tvps = NULL; 1858 struct dtv_property *tvp = NULL; 1859 int i; 1860 1861 dev_dbg(fe->dvb->device, "%s:\n", __func__); 1862 1863 if(cmd == FE_SET_PROPERTY) { 1864 tvps = (struct dtv_properties __user *)parg; 1865 1866 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); 1867 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props); 1868 1869 /* Put an arbitrary limit on the number of messages that can 1870 * be sent at once */ 1871 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1872 return -EINVAL; 1873 1874 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1875 if (!tvp) { 1876 err = -ENOMEM; 1877 goto out; 1878 } 1879 1880 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1881 err = -EFAULT; 1882 goto out; 1883 } 1884 1885 for (i = 0; i < tvps->num; i++) { 1886 err = dtv_property_process_set(fe, tvp + i, file); 1887 if (err < 0) 1888 goto out; 1889 (tvp + i)->result = err; 1890 } 1891 1892 if (c->state == DTV_TUNE) 1893 dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__); 1894 1895 } else 1896 if(cmd == FE_GET_PROPERTY) { 1897 tvps = (struct dtv_properties __user *)parg; 1898 1899 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); 1900 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props); 1901 1902 /* Put an arbitrary limit on the number of messages that can 1903 * be sent at once */ 1904 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1905 return -EINVAL; 1906 1907 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1908 if (!tvp) { 1909 err = -ENOMEM; 1910 goto out; 1911 } 1912 1913 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1914 err = -EFAULT; 1915 goto out; 1916 } 1917 1918 /* 1919 * Fills the cache out struct with the cache contents, plus 1920 * the data retrieved from get_frontend, if the frontend 1921 * is not idle. Otherwise, returns the cached content 1922 */ 1923 if (fepriv->state != FESTATE_IDLE) { 1924 err = dtv_get_frontend(fe, NULL); 1925 if (err < 0) 1926 goto out; 1927 } 1928 for (i = 0; i < tvps->num; i++) { 1929 err = dtv_property_process_get(fe, c, tvp + i, file); 1930 if (err < 0) 1931 goto out; 1932 (tvp + i)->result = err; 1933 } 1934 1935 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) { 1936 err = -EFAULT; 1937 goto out; 1938 } 1939 1940 } else 1941 err = -EOPNOTSUPP; 1942 1943 out: 1944 kfree(tvp); 1945 return err; 1946 } 1947 1948 static int dtv_set_frontend(struct dvb_frontend *fe) 1949 { 1950 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1951 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1952 struct dvb_frontend_tune_settings fetunesettings; 1953 u32 rolloff = 0; 1954 1955 if (dvb_frontend_check_parameters(fe) < 0) 1956 return -EINVAL; 1957 1958 /* 1959 * Initialize output parameters to match the values given by 1960 * the user. FE_SET_FRONTEND triggers an initial frontend event 1961 * with status = 0, which copies output parameters to userspace. 1962 */ 1963 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); 1964 1965 /* 1966 * Be sure that the bandwidth will be filled for all 1967 * non-satellite systems, as tuners need to know what 1968 * low pass/Nyquist half filter should be applied, in 1969 * order to avoid inter-channel noise. 1970 * 1971 * ISDB-T and DVB-T/T2 already sets bandwidth. 1972 * ATSC and DVB-C don't set, so, the core should fill it. 1973 * 1974 * On DVB-C Annex A and C, the bandwidth is a function of 1975 * the roll-off and symbol rate. Annex B defines different 1976 * roll-off factors depending on the modulation. Fortunately, 1977 * Annex B is only used with 6MHz, so there's no need to 1978 * calculate it. 1979 * 1980 * While not officially supported, a side effect of handling it at 1981 * the cache level is that a program could retrieve the bandwidth 1982 * via DTV_BANDWIDTH_HZ, which may be useful for test programs. 1983 */ 1984 switch (c->delivery_system) { 1985 case SYS_ATSC: 1986 case SYS_DVBC_ANNEX_B: 1987 c->bandwidth_hz = 6000000; 1988 break; 1989 case SYS_DVBC_ANNEX_A: 1990 rolloff = 115; 1991 break; 1992 case SYS_DVBC_ANNEX_C: 1993 rolloff = 113; 1994 break; 1995 default: 1996 break; 1997 } 1998 if (rolloff) 1999 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100; 2000 2001 /* force auto frequency inversion if requested */ 2002 if (dvb_force_auto_inversion) 2003 c->inversion = INVERSION_AUTO; 2004 2005 /* 2006 * without hierarchical coding code_rate_LP is irrelevant, 2007 * so we tolerate the otherwise invalid FEC_NONE setting 2008 */ 2009 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE) 2010 c->code_rate_LP = FEC_AUTO; 2011 2012 /* get frontend-specific tuning settings */ 2013 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); 2014 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { 2015 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; 2016 fepriv->max_drift = fetunesettings.max_drift; 2017 fepriv->step_size = fetunesettings.step_size; 2018 } else { 2019 /* default values */ 2020 switch (c->delivery_system) { 2021 case SYS_DVBS: 2022 case SYS_DVBS2: 2023 case SYS_ISDBS: 2024 case SYS_TURBO: 2025 case SYS_DVBC_ANNEX_A: 2026 case SYS_DVBC_ANNEX_C: 2027 fepriv->min_delay = HZ / 20; 2028 fepriv->step_size = c->symbol_rate / 16000; 2029 fepriv->max_drift = c->symbol_rate / 2000; 2030 break; 2031 case SYS_DVBT: 2032 case SYS_DVBT2: 2033 case SYS_ISDBT: 2034 case SYS_DTMB: 2035 fepriv->min_delay = HZ / 20; 2036 fepriv->step_size = fe->ops.info.frequency_stepsize * 2; 2037 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; 2038 break; 2039 default: 2040 /* 2041 * FIXME: This sounds wrong! if freqency_stepsize is 2042 * defined by the frontend, why not use it??? 2043 */ 2044 fepriv->min_delay = HZ / 20; 2045 fepriv->step_size = 0; /* no zigzag */ 2046 fepriv->max_drift = 0; 2047 break; 2048 } 2049 } 2050 if (dvb_override_tune_delay > 0) 2051 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; 2052 2053 fepriv->state = FESTATE_RETUNE; 2054 2055 /* Request the search algorithm to search */ 2056 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 2057 2058 dvb_frontend_clear_events(fe); 2059 dvb_frontend_add_event(fe, 0); 2060 dvb_frontend_wakeup(fe); 2061 fepriv->status = 0; 2062 2063 return 0; 2064 } 2065 2066 2067 static int dvb_frontend_ioctl_legacy(struct file *file, 2068 unsigned int cmd, void *parg) 2069 { 2070 struct dvb_device *dvbdev = file->private_data; 2071 struct dvb_frontend *fe = dvbdev->priv; 2072 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2073 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2074 int err = -EOPNOTSUPP; 2075 2076 switch (cmd) { 2077 case FE_GET_INFO: { 2078 struct dvb_frontend_info* info = parg; 2079 2080 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); 2081 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max); 2082 2083 /* 2084 * Associate the 4 delivery systems supported by DVBv3 2085 * API with their DVBv5 counterpart. For the other standards, 2086 * use the closest type, assuming that it would hopefully 2087 * work with a DVBv3 application. 2088 * It should be noticed that, on multi-frontend devices with 2089 * different types (terrestrial and cable, for example), 2090 * a pure DVBv3 application won't be able to use all delivery 2091 * systems. Yet, changing the DVBv5 cache to the other delivery 2092 * system should be enough for making it work. 2093 */ 2094 switch (dvbv3_type(c->delivery_system)) { 2095 case DVBV3_QPSK: 2096 info->type = FE_QPSK; 2097 break; 2098 case DVBV3_ATSC: 2099 info->type = FE_ATSC; 2100 break; 2101 case DVBV3_QAM: 2102 info->type = FE_QAM; 2103 break; 2104 case DVBV3_OFDM: 2105 info->type = FE_OFDM; 2106 break; 2107 default: 2108 dev_err(fe->dvb->device, 2109 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", 2110 __func__, c->delivery_system); 2111 fe->ops.info.type = FE_OFDM; 2112 } 2113 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n", 2114 __func__, c->delivery_system, fe->ops.info.type); 2115 2116 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't 2117 * do it, it is done for it. */ 2118 info->caps |= FE_CAN_INVERSION_AUTO; 2119 err = 0; 2120 break; 2121 } 2122 2123 case FE_READ_STATUS: { 2124 fe_status_t* status = parg; 2125 2126 /* if retune was requested but hasn't occurred yet, prevent 2127 * that user get signal state from previous tuning */ 2128 if (fepriv->state == FESTATE_RETUNE || 2129 fepriv->state == FESTATE_ERROR) { 2130 err=0; 2131 *status = 0; 2132 break; 2133 } 2134 2135 if (fe->ops.read_status) 2136 err = fe->ops.read_status(fe, status); 2137 break; 2138 } 2139 2140 case FE_READ_BER: 2141 if (fe->ops.read_ber) { 2142 if (fepriv->thread) 2143 err = fe->ops.read_ber(fe, (__u32 *) parg); 2144 else 2145 err = -EAGAIN; 2146 } 2147 break; 2148 2149 case FE_READ_SIGNAL_STRENGTH: 2150 if (fe->ops.read_signal_strength) { 2151 if (fepriv->thread) 2152 err = fe->ops.read_signal_strength(fe, (__u16 *) parg); 2153 else 2154 err = -EAGAIN; 2155 } 2156 break; 2157 2158 case FE_READ_SNR: 2159 if (fe->ops.read_snr) { 2160 if (fepriv->thread) 2161 err = fe->ops.read_snr(fe, (__u16 *) parg); 2162 else 2163 err = -EAGAIN; 2164 } 2165 break; 2166 2167 case FE_READ_UNCORRECTED_BLOCKS: 2168 if (fe->ops.read_ucblocks) { 2169 if (fepriv->thread) 2170 err = fe->ops.read_ucblocks(fe, (__u32 *) parg); 2171 else 2172 err = -EAGAIN; 2173 } 2174 break; 2175 2176 case FE_DISEQC_RESET_OVERLOAD: 2177 if (fe->ops.diseqc_reset_overload) { 2178 err = fe->ops.diseqc_reset_overload(fe); 2179 fepriv->state = FESTATE_DISEQC; 2180 fepriv->status = 0; 2181 } 2182 break; 2183 2184 case FE_DISEQC_SEND_MASTER_CMD: 2185 if (fe->ops.diseqc_send_master_cmd) { 2186 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); 2187 fepriv->state = FESTATE_DISEQC; 2188 fepriv->status = 0; 2189 } 2190 break; 2191 2192 case FE_DISEQC_SEND_BURST: 2193 if (fe->ops.diseqc_send_burst) { 2194 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); 2195 fepriv->state = FESTATE_DISEQC; 2196 fepriv->status = 0; 2197 } 2198 break; 2199 2200 case FE_SET_TONE: 2201 if (fe->ops.set_tone) { 2202 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); 2203 fepriv->tone = (fe_sec_tone_mode_t) parg; 2204 fepriv->state = FESTATE_DISEQC; 2205 fepriv->status = 0; 2206 } 2207 break; 2208 2209 case FE_SET_VOLTAGE: 2210 if (fe->ops.set_voltage) { 2211 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); 2212 fepriv->voltage = (fe_sec_voltage_t) parg; 2213 fepriv->state = FESTATE_DISEQC; 2214 fepriv->status = 0; 2215 } 2216 break; 2217 2218 case FE_DISHNETWORK_SEND_LEGACY_CMD: 2219 if (fe->ops.dishnetwork_send_legacy_command) { 2220 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); 2221 fepriv->state = FESTATE_DISEQC; 2222 fepriv->status = 0; 2223 } else if (fe->ops.set_voltage) { 2224 /* 2225 * NOTE: This is a fallback condition. Some frontends 2226 * (stv0299 for instance) take longer than 8msec to 2227 * respond to a set_voltage command. Those switches 2228 * need custom routines to switch properly. For all 2229 * other frontends, the following should work ok. 2230 * Dish network legacy switches (as used by Dish500) 2231 * are controlled by sending 9-bit command words 2232 * spaced 8msec apart. 2233 * the actual command word is switch/port dependent 2234 * so it is up to the userspace application to send 2235 * the right command. 2236 * The command must always start with a '0' after 2237 * initialization, so parg is 8 bits and does not 2238 * include the initialization or start bit 2239 */ 2240 unsigned long swcmd = ((unsigned long) parg) << 1; 2241 struct timeval nexttime; 2242 struct timeval tv[10]; 2243 int i; 2244 u8 last = 1; 2245 if (dvb_frontend_debug) 2246 printk("%s switch command: 0x%04lx\n", __func__, swcmd); 2247 do_gettimeofday(&nexttime); 2248 if (dvb_frontend_debug) 2249 memcpy(&tv[0], &nexttime, sizeof(struct timeval)); 2250 /* before sending a command, initialize by sending 2251 * a 32ms 18V to the switch 2252 */ 2253 fe->ops.set_voltage(fe, SEC_VOLTAGE_18); 2254 dvb_frontend_sleep_until(&nexttime, 32000); 2255 2256 for (i = 0; i < 9; i++) { 2257 if (dvb_frontend_debug) 2258 do_gettimeofday(&tv[i + 1]); 2259 if ((swcmd & 0x01) != last) { 2260 /* set voltage to (last ? 13V : 18V) */ 2261 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); 2262 last = (last) ? 0 : 1; 2263 } 2264 swcmd = swcmd >> 1; 2265 if (i != 8) 2266 dvb_frontend_sleep_until(&nexttime, 8000); 2267 } 2268 if (dvb_frontend_debug) { 2269 printk("%s(%d): switch delay (should be 32k followed by all 8k\n", 2270 __func__, fe->dvb->num); 2271 for (i = 1; i < 10; i++) 2272 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); 2273 } 2274 err = 0; 2275 fepriv->state = FESTATE_DISEQC; 2276 fepriv->status = 0; 2277 } 2278 break; 2279 2280 case FE_DISEQC_RECV_SLAVE_REPLY: 2281 if (fe->ops.diseqc_recv_slave_reply) 2282 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); 2283 break; 2284 2285 case FE_ENABLE_HIGH_LNB_VOLTAGE: 2286 if (fe->ops.enable_high_lnb_voltage) 2287 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); 2288 break; 2289 2290 case FE_SET_FRONTEND: 2291 err = set_delivery_system(fe, SYS_UNDEFINED); 2292 if (err) 2293 break; 2294 2295 err = dtv_property_cache_sync(fe, c, parg); 2296 if (err) 2297 break; 2298 err = dtv_set_frontend(fe); 2299 break; 2300 case FE_GET_EVENT: 2301 err = dvb_frontend_get_event (fe, parg, file->f_flags); 2302 break; 2303 2304 case FE_GET_FRONTEND: 2305 err = dtv_get_frontend(fe, parg); 2306 break; 2307 2308 case FE_SET_FRONTEND_TUNE_MODE: 2309 fepriv->tune_mode_flags = (unsigned long) parg; 2310 err = 0; 2311 break; 2312 } 2313 2314 return err; 2315 } 2316 2317 2318 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) 2319 { 2320 struct dvb_device *dvbdev = file->private_data; 2321 struct dvb_frontend *fe = dvbdev->priv; 2322 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2323 2324 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__); 2325 2326 poll_wait (file, &fepriv->events.wait_queue, wait); 2327 2328 if (fepriv->events.eventw != fepriv->events.eventr) 2329 return (POLLIN | POLLRDNORM | POLLPRI); 2330 2331 return 0; 2332 } 2333 2334 static int dvb_frontend_open(struct inode *inode, struct file *file) 2335 { 2336 struct dvb_device *dvbdev = file->private_data; 2337 struct dvb_frontend *fe = dvbdev->priv; 2338 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2339 struct dvb_adapter *adapter = fe->dvb; 2340 int ret; 2341 2342 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2343 if (fepriv->exit == DVB_FE_DEVICE_REMOVED) 2344 return -ENODEV; 2345 2346 if (adapter->mfe_shared) { 2347 mutex_lock (&adapter->mfe_lock); 2348 2349 if (adapter->mfe_dvbdev == NULL) 2350 adapter->mfe_dvbdev = dvbdev; 2351 2352 else if (adapter->mfe_dvbdev != dvbdev) { 2353 struct dvb_device 2354 *mfedev = adapter->mfe_dvbdev; 2355 struct dvb_frontend 2356 *mfe = mfedev->priv; 2357 struct dvb_frontend_private 2358 *mfepriv = mfe->frontend_priv; 2359 int mferetry = (dvb_mfe_wait_time << 1); 2360 2361 mutex_unlock (&adapter->mfe_lock); 2362 while (mferetry-- && (mfedev->users != -1 || 2363 mfepriv->thread != NULL)) { 2364 if(msleep_interruptible(500)) { 2365 if(signal_pending(current)) 2366 return -EINTR; 2367 } 2368 } 2369 2370 mutex_lock (&adapter->mfe_lock); 2371 if(adapter->mfe_dvbdev != dvbdev) { 2372 mfedev = adapter->mfe_dvbdev; 2373 mfe = mfedev->priv; 2374 mfepriv = mfe->frontend_priv; 2375 if (mfedev->users != -1 || 2376 mfepriv->thread != NULL) { 2377 mutex_unlock (&adapter->mfe_lock); 2378 return -EBUSY; 2379 } 2380 adapter->mfe_dvbdev = dvbdev; 2381 } 2382 } 2383 } 2384 2385 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { 2386 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) 2387 goto err0; 2388 2389 /* If we took control of the bus, we need to force 2390 reinitialization. This is because many ts_bus_ctrl() 2391 functions strobe the RESET pin on the demod, and if the 2392 frontend thread already exists then the dvb_init() routine 2393 won't get called (which is what usually does initial 2394 register configuration). */ 2395 fepriv->reinitialise = 1; 2396 } 2397 2398 if ((ret = dvb_generic_open (inode, file)) < 0) 2399 goto err1; 2400 2401 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2402 /* normal tune mode when opened R/W */ 2403 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; 2404 fepriv->tone = -1; 2405 fepriv->voltage = -1; 2406 2407 ret = dvb_frontend_start (fe); 2408 if (ret) 2409 goto err2; 2410 2411 /* empty event queue */ 2412 fepriv->events.eventr = fepriv->events.eventw = 0; 2413 } 2414 2415 if (adapter->mfe_shared) 2416 mutex_unlock (&adapter->mfe_lock); 2417 return ret; 2418 2419 err2: 2420 dvb_generic_release(inode, file); 2421 err1: 2422 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) 2423 fe->ops.ts_bus_ctrl(fe, 0); 2424 err0: 2425 if (adapter->mfe_shared) 2426 mutex_unlock (&adapter->mfe_lock); 2427 return ret; 2428 } 2429 2430 static int dvb_frontend_release(struct inode *inode, struct file *file) 2431 { 2432 struct dvb_device *dvbdev = file->private_data; 2433 struct dvb_frontend *fe = dvbdev->priv; 2434 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2435 int ret; 2436 2437 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2438 2439 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2440 fepriv->release_jiffies = jiffies; 2441 mb(); 2442 } 2443 2444 ret = dvb_generic_release (inode, file); 2445 2446 if (dvbdev->users == -1) { 2447 wake_up(&fepriv->wait_queue); 2448 if (fepriv->exit != DVB_FE_NO_EXIT) { 2449 fops_put(file->f_op); 2450 file->f_op = NULL; 2451 wake_up(&dvbdev->wait_queue); 2452 } 2453 if (fe->ops.ts_bus_ctrl) 2454 fe->ops.ts_bus_ctrl(fe, 0); 2455 } 2456 2457 return ret; 2458 } 2459 2460 static const struct file_operations dvb_frontend_fops = { 2461 .owner = THIS_MODULE, 2462 .unlocked_ioctl = dvb_generic_ioctl, 2463 .poll = dvb_frontend_poll, 2464 .open = dvb_frontend_open, 2465 .release = dvb_frontend_release, 2466 .llseek = noop_llseek, 2467 }; 2468 2469 int dvb_frontend_suspend(struct dvb_frontend *fe) 2470 { 2471 int ret = 0; 2472 2473 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2474 fe->id); 2475 2476 if (fe->ops.tuner_ops.sleep) 2477 ret = fe->ops.tuner_ops.sleep(fe); 2478 2479 if (fe->ops.sleep) 2480 ret = fe->ops.sleep(fe); 2481 2482 return ret; 2483 } 2484 EXPORT_SYMBOL(dvb_frontend_suspend); 2485 2486 int dvb_frontend_resume(struct dvb_frontend *fe) 2487 { 2488 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2489 int ret = 0; 2490 2491 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, 2492 fe->id); 2493 2494 if (fe->ops.init) 2495 ret = fe->ops.init(fe); 2496 2497 if (fe->ops.tuner_ops.init) 2498 ret = fe->ops.tuner_ops.init(fe); 2499 2500 fepriv->state = FESTATE_RETUNE; 2501 dvb_frontend_wakeup(fe); 2502 2503 return ret; 2504 } 2505 EXPORT_SYMBOL(dvb_frontend_resume); 2506 2507 int dvb_register_frontend(struct dvb_adapter* dvb, 2508 struct dvb_frontend* fe) 2509 { 2510 struct dvb_frontend_private *fepriv; 2511 static const struct dvb_device dvbdev_template = { 2512 .users = ~0, 2513 .writers = 1, 2514 .readers = (~0)-1, 2515 .fops = &dvb_frontend_fops, 2516 .kernel_ioctl = dvb_frontend_ioctl 2517 }; 2518 2519 dev_dbg(dvb->device, "%s:\n", __func__); 2520 2521 if (mutex_lock_interruptible(&frontend_mutex)) 2522 return -ERESTARTSYS; 2523 2524 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); 2525 if (fe->frontend_priv == NULL) { 2526 mutex_unlock(&frontend_mutex); 2527 return -ENOMEM; 2528 } 2529 fepriv = fe->frontend_priv; 2530 2531 sema_init(&fepriv->sem, 1); 2532 init_waitqueue_head (&fepriv->wait_queue); 2533 init_waitqueue_head (&fepriv->events.wait_queue); 2534 mutex_init(&fepriv->events.mtx); 2535 fe->dvb = dvb; 2536 fepriv->inversion = INVERSION_OFF; 2537 2538 dev_info(fe->dvb->device, 2539 "DVB: registering adapter %i frontend %i (%s)...\n", 2540 fe->dvb->num, fe->id, fe->ops.info.name); 2541 2542 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, 2543 fe, DVB_DEVICE_FRONTEND); 2544 2545 /* 2546 * Initialize the cache to the proper values according with the 2547 * first supported delivery system (ops->delsys[0]) 2548 */ 2549 2550 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0]; 2551 dvb_frontend_clear_cache(fe); 2552 2553 mutex_unlock(&frontend_mutex); 2554 return 0; 2555 } 2556 EXPORT_SYMBOL(dvb_register_frontend); 2557 2558 int dvb_unregister_frontend(struct dvb_frontend* fe) 2559 { 2560 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2561 dev_dbg(fe->dvb->device, "%s:\n", __func__); 2562 2563 mutex_lock(&frontend_mutex); 2564 dvb_frontend_stop (fe); 2565 mutex_unlock(&frontend_mutex); 2566 2567 if (fepriv->dvbdev->users < -1) 2568 wait_event(fepriv->dvbdev->wait_queue, 2569 fepriv->dvbdev->users==-1); 2570 2571 mutex_lock(&frontend_mutex); 2572 dvb_unregister_device (fepriv->dvbdev); 2573 2574 /* fe is invalid now */ 2575 kfree(fepriv); 2576 mutex_unlock(&frontend_mutex); 2577 return 0; 2578 } 2579 EXPORT_SYMBOL(dvb_unregister_frontend); 2580 2581 #ifdef CONFIG_MEDIA_ATTACH 2582 void dvb_frontend_detach(struct dvb_frontend* fe) 2583 { 2584 void *ptr; 2585 2586 if (fe->ops.release_sec) { 2587 fe->ops.release_sec(fe); 2588 symbol_put_addr(fe->ops.release_sec); 2589 } 2590 if (fe->ops.tuner_ops.release) { 2591 fe->ops.tuner_ops.release(fe); 2592 symbol_put_addr(fe->ops.tuner_ops.release); 2593 } 2594 if (fe->ops.analog_ops.release) { 2595 fe->ops.analog_ops.release(fe); 2596 symbol_put_addr(fe->ops.analog_ops.release); 2597 } 2598 ptr = (void*)fe->ops.release; 2599 if (ptr) { 2600 fe->ops.release(fe); 2601 symbol_put_addr(ptr); 2602 } 2603 } 2604 #else 2605 void dvb_frontend_detach(struct dvb_frontend* fe) 2606 { 2607 if (fe->ops.release_sec) 2608 fe->ops.release_sec(fe); 2609 if (fe->ops.tuner_ops.release) 2610 fe->ops.tuner_ops.release(fe); 2611 if (fe->ops.analog_ops.release) 2612 fe->ops.analog_ops.release(fe); 2613 if (fe->ops.release) 2614 fe->ops.release(fe); 2615 } 2616 #endif 2617 EXPORT_SYMBOL(dvb_frontend_detach); 2618