dvb_frontend.c revision b9d5efcceb6b34ee20111b62cf7be61ae79af4e9
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#include <linux/string.h> 29#include <linux/kernel.h> 30#include <linux/sched.h> 31#include <linux/wait.h> 32#include <linux/slab.h> 33#include <linux/poll.h> 34#include <linux/semaphore.h> 35#include <linux/module.h> 36#include <linux/list.h> 37#include <linux/freezer.h> 38#include <linux/jiffies.h> 39#include <linux/kthread.h> 40#include <asm/processor.h> 41 42#include "dvb_frontend.h" 43#include "dvbdev.h" 44#include <linux/dvb/version.h> 45 46static int dvb_frontend_debug; 47static int dvb_shutdown_timeout; 48static int dvb_force_auto_inversion; 49static int dvb_override_tune_delay; 50static int dvb_powerdown_on_sleep = 1; 51static int dvb_mfe_wait_time = 5; 52 53module_param_named(frontend_debug, dvb_frontend_debug, int, 0644); 54MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off)."); 55module_param(dvb_shutdown_timeout, int, 0644); 56MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); 57module_param(dvb_force_auto_inversion, int, 0644); 58MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); 59module_param(dvb_override_tune_delay, int, 0644); 60MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt"); 61module_param(dvb_powerdown_on_sleep, int, 0644); 62MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)"); 63module_param(dvb_mfe_wait_time, int, 0644); 64MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)"); 65 66#define dprintk if (dvb_frontend_debug) printk 67 68#define FESTATE_IDLE 1 69#define FESTATE_RETUNE 2 70#define FESTATE_TUNING_FAST 4 71#define FESTATE_TUNING_SLOW 8 72#define FESTATE_TUNED 16 73#define FESTATE_ZIGZAG_FAST 32 74#define FESTATE_ZIGZAG_SLOW 64 75#define FESTATE_DISEQC 128 76#define FESTATE_ERROR 256 77#define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) 78#define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) 79#define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) 80#define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) 81 82#define FE_ALGO_HW 1 83/* 84 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. 85 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. 86 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. 87 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. 88 * FESTATE_TUNED. The frontend has successfully locked on. 89 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. 90 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. 91 * FESTATE_DISEQC. A DISEQC command has just been issued. 92 * FESTATE_WAITFORLOCK. When we're waiting for a lock. 93 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. 94 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. 95 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. 96 */ 97 98#define DVB_FE_NO_EXIT 0 99#define DVB_FE_NORMAL_EXIT 1 100#define DVB_FE_DEVICE_REMOVED 2 101 102static DEFINE_MUTEX(frontend_mutex); 103 104struct dvb_frontend_private { 105 106 /* thread/frontend values */ 107 struct dvb_device *dvbdev; 108 struct dvb_frontend_parameters parameters_in; 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 141static void dvb_frontend_wakeup(struct dvb_frontend *fe); 142 143static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) 144{ 145 struct dvb_frontend_private *fepriv = fe->frontend_priv; 146 struct dvb_fe_events *events = &fepriv->events; 147 struct dvb_frontend_event *e; 148 int wp; 149 150 dprintk ("%s\n", __func__); 151 152 if ((status & FE_HAS_LOCK) && fe->ops.get_frontend) 153 fe->ops.get_frontend(fe, &fepriv->parameters_out); 154 155 mutex_lock(&events->mtx); 156 157 wp = (events->eventw + 1) % MAX_EVENT; 158 if (wp == events->eventr) { 159 events->overflow = 1; 160 events->eventr = (events->eventr + 1) % MAX_EVENT; 161 } 162 163 e = &events->events[events->eventw]; 164 e->status = status; 165 e->parameters = fepriv->parameters_out; 166 167 events->eventw = wp; 168 169 mutex_unlock(&events->mtx); 170 171 wake_up_interruptible (&events->wait_queue); 172} 173 174static int dvb_frontend_get_event(struct dvb_frontend *fe, 175 struct dvb_frontend_event *event, int flags) 176{ 177 struct dvb_frontend_private *fepriv = fe->frontend_priv; 178 struct dvb_fe_events *events = &fepriv->events; 179 180 dprintk ("%s\n", __func__); 181 182 if (events->overflow) { 183 events->overflow = 0; 184 return -EOVERFLOW; 185 } 186 187 if (events->eventw == events->eventr) { 188 int ret; 189 190 if (flags & O_NONBLOCK) 191 return -EWOULDBLOCK; 192 193 up(&fepriv->sem); 194 195 ret = wait_event_interruptible (events->wait_queue, 196 events->eventw != events->eventr); 197 198 if (down_interruptible (&fepriv->sem)) 199 return -ERESTARTSYS; 200 201 if (ret < 0) 202 return ret; 203 } 204 205 mutex_lock(&events->mtx); 206 *event = events->events[events->eventr]; 207 events->eventr = (events->eventr + 1) % MAX_EVENT; 208 mutex_unlock(&events->mtx); 209 210 return 0; 211} 212 213static void dvb_frontend_clear_events(struct dvb_frontend *fe) 214{ 215 struct dvb_frontend_private *fepriv = fe->frontend_priv; 216 struct dvb_fe_events *events = &fepriv->events; 217 218 mutex_lock(&events->mtx); 219 events->eventr = events->eventw; 220 mutex_unlock(&events->mtx); 221} 222 223static void dvb_frontend_init(struct dvb_frontend *fe) 224{ 225 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n", 226 fe->dvb->num, 227 fe->id, 228 fe->ops.info.name); 229 230 if (fe->ops.init) 231 fe->ops.init(fe); 232 if (fe->ops.tuner_ops.init) { 233 if (fe->ops.i2c_gate_ctrl) 234 fe->ops.i2c_gate_ctrl(fe, 1); 235 fe->ops.tuner_ops.init(fe); 236 if (fe->ops.i2c_gate_ctrl) 237 fe->ops.i2c_gate_ctrl(fe, 0); 238 } 239} 240 241void dvb_frontend_reinitialise(struct dvb_frontend *fe) 242{ 243 struct dvb_frontend_private *fepriv = fe->frontend_priv; 244 245 fepriv->reinitialise = 1; 246 dvb_frontend_wakeup(fe); 247} 248EXPORT_SYMBOL(dvb_frontend_reinitialise); 249 250static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) 251{ 252 int q2; 253 254 dprintk ("%s\n", __func__); 255 256 if (locked) 257 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; 258 else 259 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; 260 261 q2 = fepriv->quality - 128; 262 q2 *= q2; 263 264 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); 265} 266 267/** 268 * Performs automatic twiddling of frontend parameters. 269 * 270 * @param fe The frontend concerned. 271 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT 272 * @returns Number of complete iterations that have been performed. 273 */ 274static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) 275{ 276 int autoinversion; 277 int ready = 0; 278 int fe_set_err = 0; 279 struct dvb_frontend_private *fepriv = fe->frontend_priv; 280 int original_inversion = fepriv->parameters_in.inversion; 281 u32 original_frequency = fepriv->parameters_in.frequency; 282 283 /* are we using autoinversion? */ 284 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 285 (fepriv->parameters_in.inversion == INVERSION_AUTO)); 286 287 /* setup parameters correctly */ 288 while(!ready) { 289 /* calculate the lnb_drift */ 290 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; 291 292 /* wrap the auto_step if we've exceeded the maximum drift */ 293 if (fepriv->lnb_drift > fepriv->max_drift) { 294 fepriv->auto_step = 0; 295 fepriv->auto_sub_step = 0; 296 fepriv->lnb_drift = 0; 297 } 298 299 /* perform inversion and +/- zigzag */ 300 switch(fepriv->auto_sub_step) { 301 case 0: 302 /* try with the current inversion and current drift setting */ 303 ready = 1; 304 break; 305 306 case 1: 307 if (!autoinversion) break; 308 309 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 310 ready = 1; 311 break; 312 313 case 2: 314 if (fepriv->lnb_drift == 0) break; 315 316 fepriv->lnb_drift = -fepriv->lnb_drift; 317 ready = 1; 318 break; 319 320 case 3: 321 if (fepriv->lnb_drift == 0) break; 322 if (!autoinversion) break; 323 324 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; 325 fepriv->lnb_drift = -fepriv->lnb_drift; 326 ready = 1; 327 break; 328 329 default: 330 fepriv->auto_step++; 331 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ 332 break; 333 } 334 335 if (!ready) fepriv->auto_sub_step++; 336 } 337 338 /* if this attempt would hit where we started, indicate a complete 339 * iteration has occurred */ 340 if ((fepriv->auto_step == fepriv->started_auto_step) && 341 (fepriv->auto_sub_step == 0) && check_wrapped) { 342 return 1; 343 } 344 345 dprintk("%s: drift:%i inversion:%i auto_step:%i " 346 "auto_sub_step:%i started_auto_step:%i\n", 347 __func__, fepriv->lnb_drift, fepriv->inversion, 348 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step); 349 350 /* set the frontend itself */ 351 fepriv->parameters_in.frequency += fepriv->lnb_drift; 352 if (autoinversion) 353 fepriv->parameters_in.inversion = fepriv->inversion; 354 if (fe->ops.set_frontend) 355 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters_in); 356 fepriv->parameters_out = fepriv->parameters_in; 357 if (fe_set_err < 0) { 358 fepriv->state = FESTATE_ERROR; 359 return fe_set_err; 360 } 361 362 fepriv->parameters_in.frequency = original_frequency; 363 fepriv->parameters_in.inversion = original_inversion; 364 365 fepriv->auto_sub_step++; 366 return 0; 367} 368 369static void dvb_frontend_swzigzag(struct dvb_frontend *fe) 370{ 371 fe_status_t s = 0; 372 int retval = 0; 373 struct dvb_frontend_private *fepriv = fe->frontend_priv; 374 375 /* if we've got no parameters, just keep idling */ 376 if (fepriv->state & FESTATE_IDLE) { 377 fepriv->delay = 3*HZ; 378 fepriv->quality = 0; 379 return; 380 } 381 382 /* in SCAN mode, we just set the frontend when asked and leave it alone */ 383 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { 384 if (fepriv->state & FESTATE_RETUNE) { 385 if (fe->ops.set_frontend) 386 retval = fe->ops.set_frontend(fe, 387 &fepriv->parameters_in); 388 fepriv->parameters_out = fepriv->parameters_in; 389 if (retval < 0) 390 fepriv->state = FESTATE_ERROR; 391 else 392 fepriv->state = FESTATE_TUNED; 393 } 394 fepriv->delay = 3*HZ; 395 fepriv->quality = 0; 396 return; 397 } 398 399 /* get the frontend status */ 400 if (fepriv->state & FESTATE_RETUNE) { 401 s = 0; 402 } else { 403 if (fe->ops.read_status) 404 fe->ops.read_status(fe, &s); 405 if (s != fepriv->status) { 406 dvb_frontend_add_event(fe, s); 407 fepriv->status = s; 408 } 409 } 410 411 /* if we're not tuned, and we have a lock, move to the TUNED state */ 412 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { 413 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 414 fepriv->state = FESTATE_TUNED; 415 416 /* if we're tuned, then we have determined the correct inversion */ 417 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 418 (fepriv->parameters_in.inversion == INVERSION_AUTO)) { 419 fepriv->parameters_in.inversion = fepriv->inversion; 420 } 421 return; 422 } 423 424 /* if we are tuned already, check we're still locked */ 425 if (fepriv->state & FESTATE_TUNED) { 426 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 427 428 /* we're tuned, and the lock is still good... */ 429 if (s & FE_HAS_LOCK) { 430 return; 431 } else { /* if we _WERE_ tuned, but now don't have a lock */ 432 fepriv->state = FESTATE_ZIGZAG_FAST; 433 fepriv->started_auto_step = fepriv->auto_step; 434 fepriv->check_wrapped = 0; 435 } 436 } 437 438 /* don't actually do anything if we're in the LOSTLOCK state, 439 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ 440 if ((fepriv->state & FESTATE_LOSTLOCK) && 441 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { 442 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 443 return; 444 } 445 446 /* don't do anything if we're in the DISEQC state, since this 447 * might be someone with a motorized dish controlled by DISEQC. 448 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ 449 if (fepriv->state & FESTATE_DISEQC) { 450 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 451 return; 452 } 453 454 /* if we're in the RETUNE state, set everything up for a brand 455 * new scan, keeping the current inversion setting, as the next 456 * tune is _very_ likely to require the same */ 457 if (fepriv->state & FESTATE_RETUNE) { 458 fepriv->lnb_drift = 0; 459 fepriv->auto_step = 0; 460 fepriv->auto_sub_step = 0; 461 fepriv->started_auto_step = 0; 462 fepriv->check_wrapped = 0; 463 } 464 465 /* fast zigzag. */ 466 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { 467 fepriv->delay = fepriv->min_delay; 468 469 /* perform a tune */ 470 retval = dvb_frontend_swzigzag_autotune(fe, 471 fepriv->check_wrapped); 472 if (retval < 0) { 473 return; 474 } else if (retval) { 475 /* OK, if we've run out of trials at the fast speed. 476 * Drop back to slow for the _next_ attempt */ 477 fepriv->state = FESTATE_SEARCHING_SLOW; 478 fepriv->started_auto_step = fepriv->auto_step; 479 return; 480 } 481 fepriv->check_wrapped = 1; 482 483 /* if we've just retuned, enter the ZIGZAG_FAST state. 484 * This ensures we cannot return from an 485 * FE_SET_FRONTEND ioctl before the first frontend tune 486 * occurs */ 487 if (fepriv->state & FESTATE_RETUNE) { 488 fepriv->state = FESTATE_TUNING_FAST; 489 } 490 } 491 492 /* slow zigzag */ 493 if (fepriv->state & FESTATE_SEARCHING_SLOW) { 494 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 495 496 /* Note: don't bother checking for wrapping; we stay in this 497 * state until we get a lock */ 498 dvb_frontend_swzigzag_autotune(fe, 0); 499 } 500} 501 502static int dvb_frontend_is_exiting(struct dvb_frontend *fe) 503{ 504 struct dvb_frontend_private *fepriv = fe->frontend_priv; 505 506 if (fepriv->exit != DVB_FE_NO_EXIT) 507 return 1; 508 509 if (fepriv->dvbdev->writers == 1) 510 if (time_after_eq(jiffies, fepriv->release_jiffies + 511 dvb_shutdown_timeout * HZ)) 512 return 1; 513 514 return 0; 515} 516 517static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) 518{ 519 struct dvb_frontend_private *fepriv = fe->frontend_priv; 520 521 if (fepriv->wakeup) { 522 fepriv->wakeup = 0; 523 return 1; 524 } 525 return dvb_frontend_is_exiting(fe); 526} 527 528static void dvb_frontend_wakeup(struct dvb_frontend *fe) 529{ 530 struct dvb_frontend_private *fepriv = fe->frontend_priv; 531 532 fepriv->wakeup = 1; 533 wake_up_interruptible(&fepriv->wait_queue); 534} 535 536static int dvb_frontend_thread(void *data) 537{ 538 struct dvb_frontend *fe = data; 539 struct dvb_frontend_private *fepriv = fe->frontend_priv; 540 fe_status_t s; 541 enum dvbfe_algo algo; 542 543 struct dvb_frontend_parameters *params; 544 545 dprintk("%s\n", __func__); 546 547 fepriv->check_wrapped = 0; 548 fepriv->quality = 0; 549 fepriv->delay = 3*HZ; 550 fepriv->status = 0; 551 fepriv->wakeup = 0; 552 fepriv->reinitialise = 0; 553 554 dvb_frontend_init(fe); 555 556 set_freezable(); 557 while (1) { 558 up(&fepriv->sem); /* is locked when we enter the thread... */ 559restart: 560 wait_event_interruptible_timeout(fepriv->wait_queue, 561 dvb_frontend_should_wakeup(fe) || kthread_should_stop() 562 || freezing(current), 563 fepriv->delay); 564 565 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { 566 /* got signal or quitting */ 567 fepriv->exit = DVB_FE_NORMAL_EXIT; 568 break; 569 } 570 571 if (try_to_freeze()) 572 goto restart; 573 574 if (down_interruptible(&fepriv->sem)) 575 break; 576 577 if (fepriv->reinitialise) { 578 dvb_frontend_init(fe); 579 if (fe->ops.set_tone && fepriv->tone != -1) 580 fe->ops.set_tone(fe, fepriv->tone); 581 if (fe->ops.set_voltage && fepriv->voltage != -1) 582 fe->ops.set_voltage(fe, fepriv->voltage); 583 fepriv->reinitialise = 0; 584 } 585 586 /* do an iteration of the tuning loop */ 587 if (fe->ops.get_frontend_algo) { 588 algo = fe->ops.get_frontend_algo(fe); 589 switch (algo) { 590 case DVBFE_ALGO_HW: 591 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); 592 params = NULL; /* have we been asked to RETUNE ? */ 593 594 if (fepriv->state & FESTATE_RETUNE) { 595 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__); 596 params = &fepriv->parameters_in; 597 fepriv->state = FESTATE_TUNED; 598 } 599 600 if (fe->ops.tune) 601 fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s); 602 if (params) 603 fepriv->parameters_out = *params; 604 605 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { 606 dprintk("%s: state changed, adding current state\n", __func__); 607 dvb_frontend_add_event(fe, s); 608 fepriv->status = s; 609 } 610 break; 611 case DVBFE_ALGO_SW: 612 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); 613 dvb_frontend_swzigzag(fe); 614 break; 615 case DVBFE_ALGO_CUSTOM: 616 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); 617 if (fepriv->state & FESTATE_RETUNE) { 618 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__); 619 fepriv->state = FESTATE_TUNED; 620 } 621 /* Case where we are going to search for a carrier 622 * User asked us to retune again for some reason, possibly 623 * requesting a search with a new set of parameters 624 */ 625 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { 626 if (fe->ops.search) { 627 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters_in); 628 /* We did do a search as was requested, the flags are 629 * now unset as well and has the flags wrt to search. 630 */ 631 } else { 632 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; 633 } 634 } 635 /* Track the carrier if the search was successful */ 636 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) { 637 if (fe->ops.track) 638 fe->ops.track(fe, &fepriv->parameters_in); 639 } else { 640 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 641 fepriv->delay = HZ / 2; 642 } 643 fepriv->parameters_out = fepriv->parameters_in; 644 fe->ops.read_status(fe, &s); 645 if (s != fepriv->status) { 646 dvb_frontend_add_event(fe, s); /* update event list */ 647 fepriv->status = s; 648 if (!(s & FE_HAS_LOCK)) { 649 fepriv->delay = HZ / 10; 650 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 651 } else { 652 fepriv->delay = 60 * HZ; 653 } 654 } 655 break; 656 default: 657 dprintk("%s: UNDEFINED ALGO !\n", __func__); 658 break; 659 } 660 } else { 661 dvb_frontend_swzigzag(fe); 662 } 663 } 664 665 if (dvb_powerdown_on_sleep) { 666 if (fe->ops.set_voltage) 667 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); 668 if (fe->ops.tuner_ops.sleep) { 669 if (fe->ops.i2c_gate_ctrl) 670 fe->ops.i2c_gate_ctrl(fe, 1); 671 fe->ops.tuner_ops.sleep(fe); 672 if (fe->ops.i2c_gate_ctrl) 673 fe->ops.i2c_gate_ctrl(fe, 0); 674 } 675 if (fe->ops.sleep) 676 fe->ops.sleep(fe); 677 } 678 679 fepriv->thread = NULL; 680 if (kthread_should_stop()) 681 fepriv->exit = DVB_FE_DEVICE_REMOVED; 682 else 683 fepriv->exit = DVB_FE_NO_EXIT; 684 mb(); 685 686 dvb_frontend_wakeup(fe); 687 return 0; 688} 689 690static void dvb_frontend_stop(struct dvb_frontend *fe) 691{ 692 struct dvb_frontend_private *fepriv = fe->frontend_priv; 693 694 dprintk ("%s\n", __func__); 695 696 fepriv->exit = DVB_FE_NORMAL_EXIT; 697 mb(); 698 699 if (!fepriv->thread) 700 return; 701 702 kthread_stop(fepriv->thread); 703 704 sema_init(&fepriv->sem, 1); 705 fepriv->state = FESTATE_IDLE; 706 707 /* paranoia check in case a signal arrived */ 708 if (fepriv->thread) 709 printk("dvb_frontend_stop: warning: thread %p won't exit\n", 710 fepriv->thread); 711} 712 713s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) 714{ 715 return ((curtime.tv_usec < lasttime.tv_usec) ? 716 1000000 - lasttime.tv_usec + curtime.tv_usec : 717 curtime.tv_usec - lasttime.tv_usec); 718} 719EXPORT_SYMBOL(timeval_usec_diff); 720 721static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) 722{ 723 curtime->tv_usec += add_usec; 724 if (curtime->tv_usec >= 1000000) { 725 curtime->tv_usec -= 1000000; 726 curtime->tv_sec++; 727 } 728} 729 730/* 731 * Sleep until gettimeofday() > waketime + add_usec 732 * This needs to be as precise as possible, but as the delay is 733 * usually between 2ms and 32ms, it is done using a scheduled msleep 734 * followed by usleep (normally a busy-wait loop) for the remainder 735 */ 736void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) 737{ 738 struct timeval lasttime; 739 s32 delta, newdelta; 740 741 timeval_usec_add(waketime, add_usec); 742 743 do_gettimeofday(&lasttime); 744 delta = timeval_usec_diff(lasttime, *waketime); 745 if (delta > 2500) { 746 msleep((delta - 1500) / 1000); 747 do_gettimeofday(&lasttime); 748 newdelta = timeval_usec_diff(lasttime, *waketime); 749 delta = (newdelta > delta) ? 0 : newdelta; 750 } 751 if (delta > 0) 752 udelay(delta); 753} 754EXPORT_SYMBOL(dvb_frontend_sleep_until); 755 756static int dvb_frontend_start(struct dvb_frontend *fe) 757{ 758 int ret; 759 struct dvb_frontend_private *fepriv = fe->frontend_priv; 760 struct task_struct *fe_thread; 761 762 dprintk ("%s\n", __func__); 763 764 if (fepriv->thread) { 765 if (fepriv->exit == DVB_FE_NO_EXIT) 766 return 0; 767 else 768 dvb_frontend_stop (fe); 769 } 770 771 if (signal_pending(current)) 772 return -EINTR; 773 if (down_interruptible (&fepriv->sem)) 774 return -EINTR; 775 776 fepriv->state = FESTATE_IDLE; 777 fepriv->exit = DVB_FE_NO_EXIT; 778 fepriv->thread = NULL; 779 mb(); 780 781 fe_thread = kthread_run(dvb_frontend_thread, fe, 782 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id); 783 if (IS_ERR(fe_thread)) { 784 ret = PTR_ERR(fe_thread); 785 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret); 786 up(&fepriv->sem); 787 return ret; 788 } 789 fepriv->thread = fe_thread; 790 return 0; 791} 792 793static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe, 794 u32 *freq_min, u32 *freq_max) 795{ 796 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min); 797 798 if (fe->ops.info.frequency_max == 0) 799 *freq_max = fe->ops.tuner_ops.info.frequency_max; 800 else if (fe->ops.tuner_ops.info.frequency_max == 0) 801 *freq_max = fe->ops.info.frequency_max; 802 else 803 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max); 804 805 if (*freq_min == 0 || *freq_max == 0) 806 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n", 807 fe->dvb->num,fe->id); 808} 809 810static int dvb_frontend_check_parameters(struct dvb_frontend *fe, 811 struct dvb_frontend_parameters *parms) 812{ 813 u32 freq_min; 814 u32 freq_max; 815 816 /* range check: frequency */ 817 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max); 818 if ((freq_min && parms->frequency < freq_min) || 819 (freq_max && parms->frequency > freq_max)) { 820 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n", 821 fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max); 822 return -EINVAL; 823 } 824 825 /* range check: symbol rate */ 826 if (fe->ops.info.type == FE_QPSK) { 827 if ((fe->ops.info.symbol_rate_min && 828 parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) || 829 (fe->ops.info.symbol_rate_max && 830 parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) { 831 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", 832 fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate, 833 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max); 834 return -EINVAL; 835 } 836 837 } else if (fe->ops.info.type == FE_QAM) { 838 if ((fe->ops.info.symbol_rate_min && 839 parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) || 840 (fe->ops.info.symbol_rate_max && 841 parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) { 842 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", 843 fe->dvb->num, fe->id, parms->u.qam.symbol_rate, 844 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max); 845 return -EINVAL; 846 } 847 } 848 849 /* check for supported modulation */ 850 if (fe->ops.info.type == FE_QAM && 851 (parms->u.qam.modulation > QAM_AUTO || 852 !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) { 853 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n", 854 fe->dvb->num, fe->id, parms->u.qam.modulation); 855 return -EINVAL; 856 } 857 858 return 0; 859} 860 861static int dvb_frontend_clear_cache(struct dvb_frontend *fe) 862{ 863 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 864 int i; 865 866 memset(c, 0, sizeof(struct dtv_frontend_properties)); 867 868 c->state = DTV_CLEAR; 869 c->delivery_system = SYS_UNDEFINED; 870 c->inversion = INVERSION_AUTO; 871 c->fec_inner = FEC_AUTO; 872 c->transmission_mode = TRANSMISSION_MODE_AUTO; 873 c->bandwidth_hz = BANDWIDTH_AUTO; 874 c->guard_interval = GUARD_INTERVAL_AUTO; 875 c->hierarchy = HIERARCHY_AUTO; 876 c->symbol_rate = QAM_AUTO; 877 c->code_rate_HP = FEC_AUTO; 878 c->code_rate_LP = FEC_AUTO; 879 c->rolloff = ROLLOFF_AUTO; 880 881 c->isdbt_partial_reception = -1; 882 c->isdbt_sb_mode = -1; 883 c->isdbt_sb_subchannel = -1; 884 c->isdbt_sb_segment_idx = -1; 885 c->isdbt_sb_segment_count = -1; 886 c->isdbt_layer_enabled = 0x7; 887 for (i = 0; i < 3; i++) { 888 c->layer[i].fec = FEC_AUTO; 889 c->layer[i].modulation = QAM_AUTO; 890 c->layer[i].interleaving = -1; 891 c->layer[i].segment_count = -1; 892 } 893 894 return 0; 895} 896 897#define _DTV_CMD(n, s, b) \ 898[n] = { \ 899 .name = #n, \ 900 .cmd = n, \ 901 .set = s,\ 902 .buffer = b \ 903} 904 905static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = { 906 _DTV_CMD(DTV_TUNE, 1, 0), 907 _DTV_CMD(DTV_CLEAR, 1, 0), 908 909 /* Set */ 910 _DTV_CMD(DTV_FREQUENCY, 1, 0), 911 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), 912 _DTV_CMD(DTV_MODULATION, 1, 0), 913 _DTV_CMD(DTV_INVERSION, 1, 0), 914 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), 915 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), 916 _DTV_CMD(DTV_INNER_FEC, 1, 0), 917 _DTV_CMD(DTV_VOLTAGE, 1, 0), 918 _DTV_CMD(DTV_TONE, 1, 0), 919 _DTV_CMD(DTV_PILOT, 1, 0), 920 _DTV_CMD(DTV_ROLLOFF, 1, 0), 921 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), 922 _DTV_CMD(DTV_HIERARCHY, 1, 0), 923 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), 924 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), 925 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), 926 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), 927 928 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), 929 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), 930 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), 931 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), 932 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), 933 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), 934 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), 935 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), 936 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), 937 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), 938 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), 939 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), 940 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), 941 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), 942 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), 943 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), 944 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), 945 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), 946 947 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0), 948 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0), 949 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0), 950 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0), 951 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0), 952 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0), 953 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0), 954 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0), 955 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0), 956 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0), 957 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0), 958 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0), 959 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0), 960 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0), 961 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0), 962 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0), 963 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0), 964 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0), 965 966 _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0), 967 _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0), 968 969 /* Get */ 970 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), 971 _DTV_CMD(DTV_API_VERSION, 0, 0), 972 _DTV_CMD(DTV_CODE_RATE_HP, 0, 0), 973 _DTV_CMD(DTV_CODE_RATE_LP, 0, 0), 974 _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0), 975 _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0), 976 _DTV_CMD(DTV_HIERARCHY, 0, 0), 977 978 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0), 979}; 980 981static void dtv_property_dump(struct dtv_property *tvp) 982{ 983 int i; 984 985 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) { 986 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n", 987 __func__, tvp->cmd); 988 return; 989 } 990 991 dprintk("%s() tvp.cmd = 0x%08x (%s)\n" 992 ,__func__ 993 ,tvp->cmd 994 ,dtv_cmds[ tvp->cmd ].name); 995 996 if(dtv_cmds[ tvp->cmd ].buffer) { 997 998 dprintk("%s() tvp.u.buffer.len = 0x%02x\n" 999 ,__func__ 1000 ,tvp->u.buffer.len); 1001 1002 for(i = 0; i < tvp->u.buffer.len; i++) 1003 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n" 1004 ,__func__ 1005 ,i 1006 ,tvp->u.buffer.data[i]); 1007 1008 } else 1009 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data); 1010} 1011 1012static int is_legacy_delivery_system(fe_delivery_system_t s) 1013{ 1014 if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_A) || 1015 (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) || 1016 (s == SYS_ATSC)) 1017 return 1; 1018 1019 return 0; 1020} 1021 1022/* Initialize the cache with some default values derived from the 1023 * legacy frontend_info structure. 1024 */ 1025static void dtv_property_cache_init(struct dvb_frontend *fe, 1026 struct dtv_frontend_properties *c) 1027{ 1028 switch (fe->ops.info.type) { 1029 case FE_QPSK: 1030 c->modulation = QPSK; /* implied for DVB-S in legacy API */ 1031 c->rolloff = ROLLOFF_35;/* implied for DVB-S */ 1032 c->delivery_system = SYS_DVBS; 1033 break; 1034 case FE_QAM: 1035 c->delivery_system = SYS_DVBC_ANNEX_A; 1036 break; 1037 case FE_OFDM: 1038 c->delivery_system = SYS_DVBT; 1039 break; 1040 case FE_ATSC: 1041 break; 1042 } 1043} 1044 1045/* Synchronise the legacy tuning parameters into the cache, so that demodulator 1046 * drivers can use a single set_frontend tuning function, regardless of whether 1047 * it's being used for the legacy or new API, reducing code and complexity. 1048 */ 1049static void dtv_property_cache_sync(struct dvb_frontend *fe, 1050 struct dtv_frontend_properties *c, 1051 const struct dvb_frontend_parameters *p) 1052{ 1053 c->frequency = p->frequency; 1054 c->inversion = p->inversion; 1055 1056 switch (fe->ops.info.type) { 1057 case FE_QPSK: 1058 c->symbol_rate = p->u.qpsk.symbol_rate; 1059 c->fec_inner = p->u.qpsk.fec_inner; 1060 break; 1061 case FE_QAM: 1062 c->symbol_rate = p->u.qam.symbol_rate; 1063 c->fec_inner = p->u.qam.fec_inner; 1064 c->modulation = p->u.qam.modulation; 1065 break; 1066 case FE_OFDM: 1067 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ) 1068 c->bandwidth_hz = 6000000; 1069 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ) 1070 c->bandwidth_hz = 7000000; 1071 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ) 1072 c->bandwidth_hz = 8000000; 1073 else 1074 /* Including BANDWIDTH_AUTO */ 1075 c->bandwidth_hz = 0; 1076 c->code_rate_HP = p->u.ofdm.code_rate_HP; 1077 c->code_rate_LP = p->u.ofdm.code_rate_LP; 1078 c->modulation = p->u.ofdm.constellation; 1079 c->transmission_mode = p->u.ofdm.transmission_mode; 1080 c->guard_interval = p->u.ofdm.guard_interval; 1081 c->hierarchy = p->u.ofdm.hierarchy_information; 1082 break; 1083 case FE_ATSC: 1084 c->modulation = p->u.vsb.modulation; 1085 if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) 1086 c->delivery_system = SYS_ATSC; 1087 else 1088 c->delivery_system = SYS_DVBC_ANNEX_B; 1089 break; 1090 } 1091} 1092 1093/* Ensure the cached values are set correctly in the frontend 1094 * legacy tuning structures, for the advanced tuning API. 1095 */ 1096static void dtv_property_legacy_params_sync(struct dvb_frontend *fe) 1097{ 1098 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1099 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1100 struct dvb_frontend_parameters *p = &fepriv->parameters_in; 1101 1102 p->frequency = c->frequency; 1103 p->inversion = c->inversion; 1104 1105 switch (fe->ops.info.type) { 1106 case FE_QPSK: 1107 dprintk("%s() Preparing QPSK req\n", __func__); 1108 p->u.qpsk.symbol_rate = c->symbol_rate; 1109 p->u.qpsk.fec_inner = c->fec_inner; 1110 break; 1111 case FE_QAM: 1112 dprintk("%s() Preparing QAM req\n", __func__); 1113 p->u.qam.symbol_rate = c->symbol_rate; 1114 p->u.qam.fec_inner = c->fec_inner; 1115 p->u.qam.modulation = c->modulation; 1116 break; 1117 case FE_OFDM: 1118 dprintk("%s() Preparing OFDM req\n", __func__); 1119 if (c->bandwidth_hz == 6000000) 1120 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1121 else if (c->bandwidth_hz == 7000000) 1122 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1123 else if (c->bandwidth_hz == 8000000) 1124 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1125 else 1126 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1127 p->u.ofdm.code_rate_HP = c->code_rate_HP; 1128 p->u.ofdm.code_rate_LP = c->code_rate_LP; 1129 p->u.ofdm.constellation = c->modulation; 1130 p->u.ofdm.transmission_mode = c->transmission_mode; 1131 p->u.ofdm.guard_interval = c->guard_interval; 1132 p->u.ofdm.hierarchy_information = c->hierarchy; 1133 break; 1134 case FE_ATSC: 1135 dprintk("%s() Preparing VSB req\n", __func__); 1136 p->u.vsb.modulation = c->modulation; 1137 break; 1138 } 1139} 1140 1141/* Ensure the cached values are set correctly in the frontend 1142 * legacy tuning structures, for the legacy tuning API. 1143 */ 1144static void dtv_property_adv_params_sync(struct dvb_frontend *fe) 1145{ 1146 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1147 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1148 struct dvb_frontend_parameters *p = &fepriv->parameters_in; 1149 u32 rolloff = 0; 1150 1151 p->frequency = c->frequency; 1152 p->inversion = c->inversion; 1153 1154 if (c->delivery_system == SYS_DSS || 1155 c->delivery_system == SYS_DVBS || 1156 c->delivery_system == SYS_DVBS2 || 1157 c->delivery_system == SYS_ISDBS || 1158 c->delivery_system == SYS_TURBO) { 1159 p->u.qpsk.symbol_rate = c->symbol_rate; 1160 p->u.qpsk.fec_inner = c->fec_inner; 1161 } 1162 1163 /* Fake out a generic DVB-T request so we pass validation in the ioctl */ 1164 if ((c->delivery_system == SYS_ISDBT) || 1165 (c->delivery_system == SYS_DVBT2)) { 1166 p->u.ofdm.constellation = QAM_AUTO; 1167 p->u.ofdm.code_rate_HP = FEC_AUTO; 1168 p->u.ofdm.code_rate_LP = FEC_AUTO; 1169 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO; 1170 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO; 1171 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO; 1172 if (c->bandwidth_hz == 8000000) 1173 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1174 else if (c->bandwidth_hz == 7000000) 1175 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1176 else if (c->bandwidth_hz == 6000000) 1177 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1178 else 1179 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1180 } 1181 1182 /* 1183 * On DVB-C, the bandwidth is a function of roll-off and symbol rate. 1184 * The bandwidth is required for DVB-C tuners, in order to avoid 1185 * inter-channel noise. Instead of estimating the minimal required 1186 * bandwidth on every single driver, calculates it here and fills 1187 * it at the cache bandwidth parameter. 1188 * While not officially supported, a side effect of handling it at 1189 * the cache level is that a program could retrieve the bandwidth 1190 * via DTV_BANDWIDTH_HZ, wich may be useful for test programs. 1191 */ 1192 if (c->delivery_system == SYS_DVBC_ANNEX_A) 1193 rolloff = 115; 1194 if (c->delivery_system == SYS_DVBC_ANNEX_C) 1195 rolloff = 113; 1196 if (rolloff) 1197 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100; 1198} 1199 1200static void dtv_property_cache_submit(struct dvb_frontend *fe) 1201{ 1202 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1203 1204 /* For legacy delivery systems we don't need the delivery_system to 1205 * be specified, but we populate the older structures from the cache 1206 * so we can call set_frontend on older drivers. 1207 */ 1208 if(is_legacy_delivery_system(c->delivery_system)) { 1209 1210 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation); 1211 dtv_property_legacy_params_sync(fe); 1212 1213 } else { 1214 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation); 1215 1216 /* For advanced delivery systems / modulation types ... 1217 * we seed the lecacy dvb_frontend_parameters structure 1218 * so that the sanity checking code later in the IOCTL processing 1219 * can validate our basic frequency ranges, symbolrates, modulation 1220 * etc. 1221 */ 1222 dtv_property_adv_params_sync(fe); 1223 } 1224} 1225 1226static int dvb_frontend_ioctl_legacy(struct file *file, 1227 unsigned int cmd, void *parg); 1228static int dvb_frontend_ioctl_properties(struct file *file, 1229 unsigned int cmd, void *parg); 1230 1231static void dtv_set_default_delivery_caps(const struct dvb_frontend *fe, struct dtv_property *p) 1232{ 1233 const struct dvb_frontend_info *info = &fe->ops.info; 1234 u32 ncaps = 0; 1235 1236 switch (info->type) { 1237 case FE_QPSK: 1238 p->u.buffer.data[ncaps++] = SYS_DVBS; 1239 if (info->caps & FE_CAN_2G_MODULATION) 1240 p->u.buffer.data[ncaps++] = SYS_DVBS2; 1241 if (info->caps & FE_CAN_TURBO_FEC) 1242 p->u.buffer.data[ncaps++] = SYS_TURBO; 1243 break; 1244 case FE_QAM: 1245 p->u.buffer.data[ncaps++] = SYS_DVBC_ANNEX_AC; 1246 break; 1247 case FE_OFDM: 1248 p->u.buffer.data[ncaps++] = SYS_DVBT; 1249 if (info->caps & FE_CAN_2G_MODULATION) 1250 p->u.buffer.data[ncaps++] = SYS_DVBT2; 1251 break; 1252 case FE_ATSC: 1253 if (info->caps & (FE_CAN_8VSB | FE_CAN_16VSB)) 1254 p->u.buffer.data[ncaps++] = SYS_ATSC; 1255 if (info->caps & (FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_128 | FE_CAN_QAM_256)) 1256 p->u.buffer.data[ncaps++] = SYS_DVBC_ANNEX_B; 1257 break; 1258 } 1259 p->u.buffer.len = ncaps; 1260} 1261 1262static int dtv_property_process_get(struct dvb_frontend *fe, 1263 struct dtv_property *tvp, 1264 struct file *file) 1265{ 1266 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1267 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1268 struct dtv_frontend_properties cdetected; 1269 int r; 1270 1271 /* 1272 * If the driver implements a get_frontend function, then convert 1273 * detected parameters to S2API properties. 1274 */ 1275 if (fe->ops.get_frontend) { 1276 cdetected = *c; 1277 dtv_property_cache_sync(fe, &cdetected, &fepriv->parameters_out); 1278 c = &cdetected; 1279 } 1280 1281 switch(tvp->cmd) { 1282 case DTV_ENUM_DELSYS: 1283 dtv_set_default_delivery_caps(fe, tvp); 1284 break; 1285 case DTV_FREQUENCY: 1286 tvp->u.data = c->frequency; 1287 break; 1288 case DTV_MODULATION: 1289 tvp->u.data = c->modulation; 1290 break; 1291 case DTV_BANDWIDTH_HZ: 1292 tvp->u.data = c->bandwidth_hz; 1293 break; 1294 case DTV_INVERSION: 1295 tvp->u.data = c->inversion; 1296 break; 1297 case DTV_SYMBOL_RATE: 1298 tvp->u.data = c->symbol_rate; 1299 break; 1300 case DTV_INNER_FEC: 1301 tvp->u.data = c->fec_inner; 1302 break; 1303 case DTV_PILOT: 1304 tvp->u.data = c->pilot; 1305 break; 1306 case DTV_ROLLOFF: 1307 tvp->u.data = c->rolloff; 1308 break; 1309 case DTV_DELIVERY_SYSTEM: 1310 tvp->u.data = c->delivery_system; 1311 break; 1312 case DTV_VOLTAGE: 1313 tvp->u.data = c->voltage; 1314 break; 1315 case DTV_TONE: 1316 tvp->u.data = c->sectone; 1317 break; 1318 case DTV_API_VERSION: 1319 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; 1320 break; 1321 case DTV_CODE_RATE_HP: 1322 tvp->u.data = c->code_rate_HP; 1323 break; 1324 case DTV_CODE_RATE_LP: 1325 tvp->u.data = c->code_rate_LP; 1326 break; 1327 case DTV_GUARD_INTERVAL: 1328 tvp->u.data = c->guard_interval; 1329 break; 1330 case DTV_TRANSMISSION_MODE: 1331 tvp->u.data = c->transmission_mode; 1332 break; 1333 case DTV_HIERARCHY: 1334 tvp->u.data = c->hierarchy; 1335 break; 1336 1337 /* ISDB-T Support here */ 1338 case DTV_ISDBT_PARTIAL_RECEPTION: 1339 tvp->u.data = c->isdbt_partial_reception; 1340 break; 1341 case DTV_ISDBT_SOUND_BROADCASTING: 1342 tvp->u.data = c->isdbt_sb_mode; 1343 break; 1344 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1345 tvp->u.data = c->isdbt_sb_subchannel; 1346 break; 1347 case DTV_ISDBT_SB_SEGMENT_IDX: 1348 tvp->u.data = c->isdbt_sb_segment_idx; 1349 break; 1350 case DTV_ISDBT_SB_SEGMENT_COUNT: 1351 tvp->u.data = c->isdbt_sb_segment_count; 1352 break; 1353 case DTV_ISDBT_LAYER_ENABLED: 1354 tvp->u.data = c->isdbt_layer_enabled; 1355 break; 1356 case DTV_ISDBT_LAYERA_FEC: 1357 tvp->u.data = c->layer[0].fec; 1358 break; 1359 case DTV_ISDBT_LAYERA_MODULATION: 1360 tvp->u.data = c->layer[0].modulation; 1361 break; 1362 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1363 tvp->u.data = c->layer[0].segment_count; 1364 break; 1365 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1366 tvp->u.data = c->layer[0].interleaving; 1367 break; 1368 case DTV_ISDBT_LAYERB_FEC: 1369 tvp->u.data = c->layer[1].fec; 1370 break; 1371 case DTV_ISDBT_LAYERB_MODULATION: 1372 tvp->u.data = c->layer[1].modulation; 1373 break; 1374 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1375 tvp->u.data = c->layer[1].segment_count; 1376 break; 1377 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1378 tvp->u.data = c->layer[1].interleaving; 1379 break; 1380 case DTV_ISDBT_LAYERC_FEC: 1381 tvp->u.data = c->layer[2].fec; 1382 break; 1383 case DTV_ISDBT_LAYERC_MODULATION: 1384 tvp->u.data = c->layer[2].modulation; 1385 break; 1386 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1387 tvp->u.data = c->layer[2].segment_count; 1388 break; 1389 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1390 tvp->u.data = c->layer[2].interleaving; 1391 break; 1392 case DTV_ISDBS_TS_ID: 1393 tvp->u.data = c->isdbs_ts_id; 1394 break; 1395 case DTV_DVBT2_PLP_ID: 1396 tvp->u.data = c->dvbt2_plp_id; 1397 break; 1398 default: 1399 return -EINVAL; 1400 } 1401 1402 /* Allow the frontend to override outgoing properties */ 1403 if (fe->ops.get_property) { 1404 r = fe->ops.get_property(fe, tvp); 1405 if (r < 0) 1406 return r; 1407 } 1408 1409 dtv_property_dump(tvp); 1410 1411 return 0; 1412} 1413 1414static int dtv_property_process_set(struct dvb_frontend *fe, 1415 struct dtv_property *tvp, 1416 struct file *file) 1417{ 1418 int r = 0; 1419 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1420 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1421 dtv_property_dump(tvp); 1422 1423 /* Allow the frontend to validate incoming properties */ 1424 if (fe->ops.set_property) { 1425 r = fe->ops.set_property(fe, tvp); 1426 if (r < 0) 1427 return r; 1428 } 1429 1430 switch(tvp->cmd) { 1431 case DTV_CLEAR: 1432 /* Reset a cache of data specific to the frontend here. This does 1433 * not effect hardware. 1434 */ 1435 dvb_frontend_clear_cache(fe); 1436 dprintk("%s() Flushing property cache\n", __func__); 1437 break; 1438 case DTV_TUNE: 1439 /* interpret the cache of data, build either a traditional frontend 1440 * tunerequest so we can pass validation in the FE_SET_FRONTEND 1441 * ioctl. 1442 */ 1443 c->state = tvp->cmd; 1444 dprintk("%s() Finalised property cache\n", __func__); 1445 dtv_property_cache_submit(fe); 1446 1447 r = dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND, 1448 &fepriv->parameters_in); 1449 break; 1450 case DTV_FREQUENCY: 1451 c->frequency = tvp->u.data; 1452 break; 1453 case DTV_MODULATION: 1454 c->modulation = tvp->u.data; 1455 break; 1456 case DTV_BANDWIDTH_HZ: 1457 c->bandwidth_hz = tvp->u.data; 1458 break; 1459 case DTV_INVERSION: 1460 c->inversion = tvp->u.data; 1461 break; 1462 case DTV_SYMBOL_RATE: 1463 c->symbol_rate = tvp->u.data; 1464 break; 1465 case DTV_INNER_FEC: 1466 c->fec_inner = tvp->u.data; 1467 break; 1468 case DTV_PILOT: 1469 c->pilot = tvp->u.data; 1470 break; 1471 case DTV_ROLLOFF: 1472 c->rolloff = tvp->u.data; 1473 break; 1474 case DTV_DELIVERY_SYSTEM: 1475 c->delivery_system = tvp->u.data; 1476 break; 1477 case DTV_VOLTAGE: 1478 c->voltage = tvp->u.data; 1479 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE, 1480 (void *)c->voltage); 1481 break; 1482 case DTV_TONE: 1483 c->sectone = tvp->u.data; 1484 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE, 1485 (void *)c->sectone); 1486 break; 1487 case DTV_CODE_RATE_HP: 1488 c->code_rate_HP = tvp->u.data; 1489 break; 1490 case DTV_CODE_RATE_LP: 1491 c->code_rate_LP = tvp->u.data; 1492 break; 1493 case DTV_GUARD_INTERVAL: 1494 c->guard_interval = tvp->u.data; 1495 break; 1496 case DTV_TRANSMISSION_MODE: 1497 c->transmission_mode = tvp->u.data; 1498 break; 1499 case DTV_HIERARCHY: 1500 c->hierarchy = tvp->u.data; 1501 break; 1502 1503 /* ISDB-T Support here */ 1504 case DTV_ISDBT_PARTIAL_RECEPTION: 1505 c->isdbt_partial_reception = tvp->u.data; 1506 break; 1507 case DTV_ISDBT_SOUND_BROADCASTING: 1508 c->isdbt_sb_mode = tvp->u.data; 1509 break; 1510 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1511 c->isdbt_sb_subchannel = tvp->u.data; 1512 break; 1513 case DTV_ISDBT_SB_SEGMENT_IDX: 1514 c->isdbt_sb_segment_idx = tvp->u.data; 1515 break; 1516 case DTV_ISDBT_SB_SEGMENT_COUNT: 1517 c->isdbt_sb_segment_count = tvp->u.data; 1518 break; 1519 case DTV_ISDBT_LAYER_ENABLED: 1520 c->isdbt_layer_enabled = tvp->u.data; 1521 break; 1522 case DTV_ISDBT_LAYERA_FEC: 1523 c->layer[0].fec = tvp->u.data; 1524 break; 1525 case DTV_ISDBT_LAYERA_MODULATION: 1526 c->layer[0].modulation = tvp->u.data; 1527 break; 1528 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1529 c->layer[0].segment_count = tvp->u.data; 1530 break; 1531 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1532 c->layer[0].interleaving = tvp->u.data; 1533 break; 1534 case DTV_ISDBT_LAYERB_FEC: 1535 c->layer[1].fec = tvp->u.data; 1536 break; 1537 case DTV_ISDBT_LAYERB_MODULATION: 1538 c->layer[1].modulation = tvp->u.data; 1539 break; 1540 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1541 c->layer[1].segment_count = tvp->u.data; 1542 break; 1543 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1544 c->layer[1].interleaving = tvp->u.data; 1545 break; 1546 case DTV_ISDBT_LAYERC_FEC: 1547 c->layer[2].fec = tvp->u.data; 1548 break; 1549 case DTV_ISDBT_LAYERC_MODULATION: 1550 c->layer[2].modulation = tvp->u.data; 1551 break; 1552 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1553 c->layer[2].segment_count = tvp->u.data; 1554 break; 1555 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1556 c->layer[2].interleaving = tvp->u.data; 1557 break; 1558 case DTV_ISDBS_TS_ID: 1559 c->isdbs_ts_id = tvp->u.data; 1560 break; 1561 case DTV_DVBT2_PLP_ID: 1562 c->dvbt2_plp_id = tvp->u.data; 1563 break; 1564 default: 1565 return -EINVAL; 1566 } 1567 1568 return r; 1569} 1570 1571static int dvb_frontend_ioctl(struct file *file, 1572 unsigned int cmd, void *parg) 1573{ 1574 struct dvb_device *dvbdev = file->private_data; 1575 struct dvb_frontend *fe = dvbdev->priv; 1576 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1577 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1578 int err = -EOPNOTSUPP; 1579 1580 dprintk("%s (%d)\n", __func__, _IOC_NR(cmd)); 1581 1582 if (fepriv->exit != DVB_FE_NO_EXIT) 1583 return -ENODEV; 1584 1585 if ((file->f_flags & O_ACCMODE) == O_RDONLY && 1586 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || 1587 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) 1588 return -EPERM; 1589 1590 if (down_interruptible (&fepriv->sem)) 1591 return -ERESTARTSYS; 1592 1593 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY)) 1594 err = dvb_frontend_ioctl_properties(file, cmd, parg); 1595 else { 1596 c->state = DTV_UNDEFINED; 1597 err = dvb_frontend_ioctl_legacy(file, cmd, parg); 1598 } 1599 1600 up(&fepriv->sem); 1601 return err; 1602} 1603 1604static int dvb_frontend_ioctl_properties(struct file *file, 1605 unsigned int cmd, void *parg) 1606{ 1607 struct dvb_device *dvbdev = file->private_data; 1608 struct dvb_frontend *fe = dvbdev->priv; 1609 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1610 int err = 0; 1611 1612 struct dtv_properties *tvps = NULL; 1613 struct dtv_property *tvp = NULL; 1614 int i; 1615 1616 dprintk("%s\n", __func__); 1617 1618 if(cmd == FE_SET_PROPERTY) { 1619 tvps = (struct dtv_properties __user *)parg; 1620 1621 dprintk("%s() properties.num = %d\n", __func__, tvps->num); 1622 dprintk("%s() properties.props = %p\n", __func__, tvps->props); 1623 1624 /* Put an arbitrary limit on the number of messages that can 1625 * be sent at once */ 1626 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1627 return -EINVAL; 1628 1629 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1630 if (!tvp) { 1631 err = -ENOMEM; 1632 goto out; 1633 } 1634 1635 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1636 err = -EFAULT; 1637 goto out; 1638 } 1639 1640 for (i = 0; i < tvps->num; i++) { 1641 err = dtv_property_process_set(fe, tvp + i, file); 1642 if (err < 0) 1643 goto out; 1644 (tvp + i)->result = err; 1645 } 1646 1647 if (c->state == DTV_TUNE) 1648 dprintk("%s() Property cache is full, tuning\n", __func__); 1649 1650 } else 1651 if(cmd == FE_GET_PROPERTY) { 1652 1653 tvps = (struct dtv_properties __user *)parg; 1654 1655 dprintk("%s() properties.num = %d\n", __func__, tvps->num); 1656 dprintk("%s() properties.props = %p\n", __func__, tvps->props); 1657 1658 /* Put an arbitrary limit on the number of messages that can 1659 * be sent at once */ 1660 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1661 return -EINVAL; 1662 1663 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1664 if (!tvp) { 1665 err = -ENOMEM; 1666 goto out; 1667 } 1668 1669 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1670 err = -EFAULT; 1671 goto out; 1672 } 1673 1674 for (i = 0; i < tvps->num; i++) { 1675 err = dtv_property_process_get(fe, tvp + i, file); 1676 if (err < 0) 1677 goto out; 1678 (tvp + i)->result = err; 1679 } 1680 1681 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) { 1682 err = -EFAULT; 1683 goto out; 1684 } 1685 1686 } else 1687 err = -EOPNOTSUPP; 1688 1689out: 1690 kfree(tvp); 1691 return err; 1692} 1693 1694static int dvb_frontend_ioctl_legacy(struct file *file, 1695 unsigned int cmd, void *parg) 1696{ 1697 struct dvb_device *dvbdev = file->private_data; 1698 struct dvb_frontend *fe = dvbdev->priv; 1699 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1700 int cb_err, err = -EOPNOTSUPP; 1701 1702 if (fe->dvb->fe_ioctl_override) { 1703 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg, 1704 DVB_FE_IOCTL_PRE); 1705 if (cb_err < 0) 1706 return cb_err; 1707 if (cb_err > 0) 1708 return 0; 1709 /* fe_ioctl_override returning 0 allows 1710 * dvb-core to continue handling the ioctl */ 1711 } 1712 1713 switch (cmd) { 1714 case FE_GET_INFO: { 1715 struct dvb_frontend_info* info = parg; 1716 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); 1717 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max); 1718 1719 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't 1720 * do it, it is done for it. */ 1721 info->caps |= FE_CAN_INVERSION_AUTO; 1722 err = 0; 1723 break; 1724 } 1725 1726 case FE_READ_STATUS: { 1727 fe_status_t* status = parg; 1728 1729 /* if retune was requested but hasn't occurred yet, prevent 1730 * that user get signal state from previous tuning */ 1731 if (fepriv->state == FESTATE_RETUNE || 1732 fepriv->state == FESTATE_ERROR) { 1733 err=0; 1734 *status = 0; 1735 break; 1736 } 1737 1738 if (fe->ops.read_status) 1739 err = fe->ops.read_status(fe, status); 1740 break; 1741 } 1742 case FE_READ_BER: 1743 if (fe->ops.read_ber) 1744 err = fe->ops.read_ber(fe, (__u32*) parg); 1745 break; 1746 1747 case FE_READ_SIGNAL_STRENGTH: 1748 if (fe->ops.read_signal_strength) 1749 err = fe->ops.read_signal_strength(fe, (__u16*) parg); 1750 break; 1751 1752 case FE_READ_SNR: 1753 if (fe->ops.read_snr) 1754 err = fe->ops.read_snr(fe, (__u16*) parg); 1755 break; 1756 1757 case FE_READ_UNCORRECTED_BLOCKS: 1758 if (fe->ops.read_ucblocks) 1759 err = fe->ops.read_ucblocks(fe, (__u32*) parg); 1760 break; 1761 1762 1763 case FE_DISEQC_RESET_OVERLOAD: 1764 if (fe->ops.diseqc_reset_overload) { 1765 err = fe->ops.diseqc_reset_overload(fe); 1766 fepriv->state = FESTATE_DISEQC; 1767 fepriv->status = 0; 1768 } 1769 break; 1770 1771 case FE_DISEQC_SEND_MASTER_CMD: 1772 if (fe->ops.diseqc_send_master_cmd) { 1773 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); 1774 fepriv->state = FESTATE_DISEQC; 1775 fepriv->status = 0; 1776 } 1777 break; 1778 1779 case FE_DISEQC_SEND_BURST: 1780 if (fe->ops.diseqc_send_burst) { 1781 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); 1782 fepriv->state = FESTATE_DISEQC; 1783 fepriv->status = 0; 1784 } 1785 break; 1786 1787 case FE_SET_TONE: 1788 if (fe->ops.set_tone) { 1789 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); 1790 fepriv->tone = (fe_sec_tone_mode_t) parg; 1791 fepriv->state = FESTATE_DISEQC; 1792 fepriv->status = 0; 1793 } 1794 break; 1795 1796 case FE_SET_VOLTAGE: 1797 if (fe->ops.set_voltage) { 1798 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); 1799 fepriv->voltage = (fe_sec_voltage_t) parg; 1800 fepriv->state = FESTATE_DISEQC; 1801 fepriv->status = 0; 1802 } 1803 break; 1804 1805 case FE_DISHNETWORK_SEND_LEGACY_CMD: 1806 if (fe->ops.dishnetwork_send_legacy_command) { 1807 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); 1808 fepriv->state = FESTATE_DISEQC; 1809 fepriv->status = 0; 1810 } else if (fe->ops.set_voltage) { 1811 /* 1812 * NOTE: This is a fallback condition. Some frontends 1813 * (stv0299 for instance) take longer than 8msec to 1814 * respond to a set_voltage command. Those switches 1815 * need custom routines to switch properly. For all 1816 * other frontends, the following should work ok. 1817 * Dish network legacy switches (as used by Dish500) 1818 * are controlled by sending 9-bit command words 1819 * spaced 8msec apart. 1820 * the actual command word is switch/port dependent 1821 * so it is up to the userspace application to send 1822 * the right command. 1823 * The command must always start with a '0' after 1824 * initialization, so parg is 8 bits and does not 1825 * include the initialization or start bit 1826 */ 1827 unsigned long swcmd = ((unsigned long) parg) << 1; 1828 struct timeval nexttime; 1829 struct timeval tv[10]; 1830 int i; 1831 u8 last = 1; 1832 if (dvb_frontend_debug) 1833 printk("%s switch command: 0x%04lx\n", __func__, swcmd); 1834 do_gettimeofday(&nexttime); 1835 if (dvb_frontend_debug) 1836 memcpy(&tv[0], &nexttime, sizeof(struct timeval)); 1837 /* before sending a command, initialize by sending 1838 * a 32ms 18V to the switch 1839 */ 1840 fe->ops.set_voltage(fe, SEC_VOLTAGE_18); 1841 dvb_frontend_sleep_until(&nexttime, 32000); 1842 1843 for (i = 0; i < 9; i++) { 1844 if (dvb_frontend_debug) 1845 do_gettimeofday(&tv[i + 1]); 1846 if ((swcmd & 0x01) != last) { 1847 /* set voltage to (last ? 13V : 18V) */ 1848 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); 1849 last = (last) ? 0 : 1; 1850 } 1851 swcmd = swcmd >> 1; 1852 if (i != 8) 1853 dvb_frontend_sleep_until(&nexttime, 8000); 1854 } 1855 if (dvb_frontend_debug) { 1856 printk("%s(%d): switch delay (should be 32k followed by all 8k\n", 1857 __func__, fe->dvb->num); 1858 for (i = 1; i < 10; i++) 1859 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); 1860 } 1861 err = 0; 1862 fepriv->state = FESTATE_DISEQC; 1863 fepriv->status = 0; 1864 } 1865 break; 1866 1867 case FE_DISEQC_RECV_SLAVE_REPLY: 1868 if (fe->ops.diseqc_recv_slave_reply) 1869 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); 1870 break; 1871 1872 case FE_ENABLE_HIGH_LNB_VOLTAGE: 1873 if (fe->ops.enable_high_lnb_voltage) 1874 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); 1875 break; 1876 1877 case FE_SET_FRONTEND: { 1878 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1879 struct dvb_frontend_tune_settings fetunesettings; 1880 1881 if (c->state == DTV_TUNE) { 1882 if (dvb_frontend_check_parameters(fe, &fepriv->parameters_in) < 0) { 1883 err = -EINVAL; 1884 break; 1885 } 1886 } else { 1887 if (dvb_frontend_check_parameters(fe, parg) < 0) { 1888 err = -EINVAL; 1889 break; 1890 } 1891 1892 memcpy (&fepriv->parameters_in, parg, 1893 sizeof (struct dvb_frontend_parameters)); 1894 dtv_property_cache_init(fe, c); 1895 dtv_property_cache_sync(fe, c, &fepriv->parameters_in); 1896 } 1897 1898 /* 1899 * Initialize output parameters to match the values given by 1900 * the user. FE_SET_FRONTEND triggers an initial frontend event 1901 * with status = 0, which copies output parameters to userspace. 1902 */ 1903 fepriv->parameters_out = fepriv->parameters_in; 1904 1905 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); 1906 memcpy(&fetunesettings.parameters, parg, 1907 sizeof (struct dvb_frontend_parameters)); 1908 1909 /* force auto frequency inversion if requested */ 1910 if (dvb_force_auto_inversion) { 1911 fepriv->parameters_in.inversion = INVERSION_AUTO; 1912 fetunesettings.parameters.inversion = INVERSION_AUTO; 1913 } 1914 if (fe->ops.info.type == FE_OFDM) { 1915 /* without hierarchical coding code_rate_LP is irrelevant, 1916 * so we tolerate the otherwise invalid FEC_NONE setting */ 1917 if (fepriv->parameters_in.u.ofdm.hierarchy_information == HIERARCHY_NONE && 1918 fepriv->parameters_in.u.ofdm.code_rate_LP == FEC_NONE) 1919 fepriv->parameters_in.u.ofdm.code_rate_LP = FEC_AUTO; 1920 } 1921 1922 /* get frontend-specific tuning settings */ 1923 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { 1924 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; 1925 fepriv->max_drift = fetunesettings.max_drift; 1926 fepriv->step_size = fetunesettings.step_size; 1927 } else { 1928 /* default values */ 1929 switch(fe->ops.info.type) { 1930 case FE_QPSK: 1931 fepriv->min_delay = HZ/20; 1932 fepriv->step_size = fepriv->parameters_in.u.qpsk.symbol_rate / 16000; 1933 fepriv->max_drift = fepriv->parameters_in.u.qpsk.symbol_rate / 2000; 1934 break; 1935 1936 case FE_QAM: 1937 fepriv->min_delay = HZ/20; 1938 fepriv->step_size = 0; /* no zigzag */ 1939 fepriv->max_drift = 0; 1940 break; 1941 1942 case FE_OFDM: 1943 fepriv->min_delay = HZ/20; 1944 fepriv->step_size = fe->ops.info.frequency_stepsize * 2; 1945 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; 1946 break; 1947 case FE_ATSC: 1948 fepriv->min_delay = HZ/20; 1949 fepriv->step_size = 0; 1950 fepriv->max_drift = 0; 1951 break; 1952 } 1953 } 1954 if (dvb_override_tune_delay > 0) 1955 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; 1956 1957 fepriv->state = FESTATE_RETUNE; 1958 1959 /* Request the search algorithm to search */ 1960 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 1961 1962 dvb_frontend_clear_events(fe); 1963 dvb_frontend_add_event(fe, 0); 1964 dvb_frontend_wakeup(fe); 1965 fepriv->status = 0; 1966 err = 0; 1967 break; 1968 } 1969 1970 case FE_GET_EVENT: 1971 err = dvb_frontend_get_event (fe, parg, file->f_flags); 1972 break; 1973 1974 case FE_GET_FRONTEND: 1975 if (fe->ops.get_frontend) { 1976 err = fe->ops.get_frontend(fe, &fepriv->parameters_out); 1977 memcpy(parg, &fepriv->parameters_out, sizeof(struct dvb_frontend_parameters)); 1978 } 1979 break; 1980 1981 case FE_SET_FRONTEND_TUNE_MODE: 1982 fepriv->tune_mode_flags = (unsigned long) parg; 1983 err = 0; 1984 break; 1985 }; 1986 1987 if (fe->dvb->fe_ioctl_override) { 1988 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg, 1989 DVB_FE_IOCTL_POST); 1990 if (cb_err < 0) 1991 return cb_err; 1992 } 1993 1994 return err; 1995} 1996 1997 1998static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) 1999{ 2000 struct dvb_device *dvbdev = file->private_data; 2001 struct dvb_frontend *fe = dvbdev->priv; 2002 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2003 2004 dprintk ("%s\n", __func__); 2005 2006 poll_wait (file, &fepriv->events.wait_queue, wait); 2007 2008 if (fepriv->events.eventw != fepriv->events.eventr) 2009 return (POLLIN | POLLRDNORM | POLLPRI); 2010 2011 return 0; 2012} 2013 2014static int dvb_frontend_open(struct inode *inode, struct file *file) 2015{ 2016 struct dvb_device *dvbdev = file->private_data; 2017 struct dvb_frontend *fe = dvbdev->priv; 2018 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2019 struct dvb_adapter *adapter = fe->dvb; 2020 int ret; 2021 2022 dprintk ("%s\n", __func__); 2023 if (fepriv->exit == DVB_FE_DEVICE_REMOVED) 2024 return -ENODEV; 2025 2026 if (adapter->mfe_shared) { 2027 mutex_lock (&adapter->mfe_lock); 2028 2029 if (adapter->mfe_dvbdev == NULL) 2030 adapter->mfe_dvbdev = dvbdev; 2031 2032 else if (adapter->mfe_dvbdev != dvbdev) { 2033 struct dvb_device 2034 *mfedev = adapter->mfe_dvbdev; 2035 struct dvb_frontend 2036 *mfe = mfedev->priv; 2037 struct dvb_frontend_private 2038 *mfepriv = mfe->frontend_priv; 2039 int mferetry = (dvb_mfe_wait_time << 1); 2040 2041 mutex_unlock (&adapter->mfe_lock); 2042 while (mferetry-- && (mfedev->users != -1 || 2043 mfepriv->thread != NULL)) { 2044 if(msleep_interruptible(500)) { 2045 if(signal_pending(current)) 2046 return -EINTR; 2047 } 2048 } 2049 2050 mutex_lock (&adapter->mfe_lock); 2051 if(adapter->mfe_dvbdev != dvbdev) { 2052 mfedev = adapter->mfe_dvbdev; 2053 mfe = mfedev->priv; 2054 mfepriv = mfe->frontend_priv; 2055 if (mfedev->users != -1 || 2056 mfepriv->thread != NULL) { 2057 mutex_unlock (&adapter->mfe_lock); 2058 return -EBUSY; 2059 } 2060 adapter->mfe_dvbdev = dvbdev; 2061 } 2062 } 2063 } 2064 2065 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { 2066 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) 2067 goto err0; 2068 2069 /* If we took control of the bus, we need to force 2070 reinitialization. This is because many ts_bus_ctrl() 2071 functions strobe the RESET pin on the demod, and if the 2072 frontend thread already exists then the dvb_init() routine 2073 won't get called (which is what usually does initial 2074 register configuration). */ 2075 fepriv->reinitialise = 1; 2076 } 2077 2078 if ((ret = dvb_generic_open (inode, file)) < 0) 2079 goto err1; 2080 2081 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2082 /* normal tune mode when opened R/W */ 2083 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; 2084 fepriv->tone = -1; 2085 fepriv->voltage = -1; 2086 2087 ret = dvb_frontend_start (fe); 2088 if (ret) 2089 goto err2; 2090 2091 /* empty event queue */ 2092 fepriv->events.eventr = fepriv->events.eventw = 0; 2093 } 2094 2095 if (adapter->mfe_shared) 2096 mutex_unlock (&adapter->mfe_lock); 2097 return ret; 2098 2099err2: 2100 dvb_generic_release(inode, file); 2101err1: 2102 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) 2103 fe->ops.ts_bus_ctrl(fe, 0); 2104err0: 2105 if (adapter->mfe_shared) 2106 mutex_unlock (&adapter->mfe_lock); 2107 return ret; 2108} 2109 2110static int dvb_frontend_release(struct inode *inode, struct file *file) 2111{ 2112 struct dvb_device *dvbdev = file->private_data; 2113 struct dvb_frontend *fe = dvbdev->priv; 2114 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2115 int ret; 2116 2117 dprintk ("%s\n", __func__); 2118 2119 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 2120 fepriv->release_jiffies = jiffies; 2121 mb(); 2122 } 2123 2124 ret = dvb_generic_release (inode, file); 2125 2126 if (dvbdev->users == -1) { 2127 wake_up(&fepriv->wait_queue); 2128 if (fepriv->exit != DVB_FE_NO_EXIT) { 2129 fops_put(file->f_op); 2130 file->f_op = NULL; 2131 wake_up(&dvbdev->wait_queue); 2132 } 2133 if (fe->ops.ts_bus_ctrl) 2134 fe->ops.ts_bus_ctrl(fe, 0); 2135 } 2136 2137 return ret; 2138} 2139 2140static const struct file_operations dvb_frontend_fops = { 2141 .owner = THIS_MODULE, 2142 .unlocked_ioctl = dvb_generic_ioctl, 2143 .poll = dvb_frontend_poll, 2144 .open = dvb_frontend_open, 2145 .release = dvb_frontend_release, 2146 .llseek = noop_llseek, 2147}; 2148 2149int dvb_register_frontend(struct dvb_adapter* dvb, 2150 struct dvb_frontend* fe) 2151{ 2152 struct dvb_frontend_private *fepriv; 2153 static const struct dvb_device dvbdev_template = { 2154 .users = ~0, 2155 .writers = 1, 2156 .readers = (~0)-1, 2157 .fops = &dvb_frontend_fops, 2158 .kernel_ioctl = dvb_frontend_ioctl 2159 }; 2160 2161 dprintk ("%s\n", __func__); 2162 2163 if (mutex_lock_interruptible(&frontend_mutex)) 2164 return -ERESTARTSYS; 2165 2166 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); 2167 if (fe->frontend_priv == NULL) { 2168 mutex_unlock(&frontend_mutex); 2169 return -ENOMEM; 2170 } 2171 fepriv = fe->frontend_priv; 2172 2173 sema_init(&fepriv->sem, 1); 2174 init_waitqueue_head (&fepriv->wait_queue); 2175 init_waitqueue_head (&fepriv->events.wait_queue); 2176 mutex_init(&fepriv->events.mtx); 2177 fe->dvb = dvb; 2178 fepriv->inversion = INVERSION_OFF; 2179 2180 printk ("DVB: registering adapter %i frontend %i (%s)...\n", 2181 fe->dvb->num, 2182 fe->id, 2183 fe->ops.info.name); 2184 2185 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, 2186 fe, DVB_DEVICE_FRONTEND); 2187 2188 mutex_unlock(&frontend_mutex); 2189 return 0; 2190} 2191EXPORT_SYMBOL(dvb_register_frontend); 2192 2193int dvb_unregister_frontend(struct dvb_frontend* fe) 2194{ 2195 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2196 dprintk ("%s\n", __func__); 2197 2198 mutex_lock(&frontend_mutex); 2199 dvb_frontend_stop (fe); 2200 mutex_unlock(&frontend_mutex); 2201 2202 if (fepriv->dvbdev->users < -1) 2203 wait_event(fepriv->dvbdev->wait_queue, 2204 fepriv->dvbdev->users==-1); 2205 2206 mutex_lock(&frontend_mutex); 2207 dvb_unregister_device (fepriv->dvbdev); 2208 2209 /* fe is invalid now */ 2210 kfree(fepriv); 2211 mutex_unlock(&frontend_mutex); 2212 return 0; 2213} 2214EXPORT_SYMBOL(dvb_unregister_frontend); 2215 2216#ifdef CONFIG_MEDIA_ATTACH 2217void dvb_frontend_detach(struct dvb_frontend* fe) 2218{ 2219 void *ptr; 2220 2221 if (fe->ops.release_sec) { 2222 fe->ops.release_sec(fe); 2223 symbol_put_addr(fe->ops.release_sec); 2224 } 2225 if (fe->ops.tuner_ops.release) { 2226 fe->ops.tuner_ops.release(fe); 2227 symbol_put_addr(fe->ops.tuner_ops.release); 2228 } 2229 if (fe->ops.analog_ops.release) { 2230 fe->ops.analog_ops.release(fe); 2231 symbol_put_addr(fe->ops.analog_ops.release); 2232 } 2233 ptr = (void*)fe->ops.release; 2234 if (ptr) { 2235 fe->ops.release(fe); 2236 symbol_put_addr(ptr); 2237 } 2238} 2239#else 2240void dvb_frontend_detach(struct dvb_frontend* fe) 2241{ 2242 if (fe->ops.release_sec) 2243 fe->ops.release_sec(fe); 2244 if (fe->ops.tuner_ops.release) 2245 fe->ops.tuner_ops.release(fe); 2246 if (fe->ops.analog_ops.release) 2247 fe->ops.analog_ops.release(fe); 2248 if (fe->ops.release) 2249 fe->ops.release(fe); 2250} 2251#endif 2252EXPORT_SYMBOL(dvb_frontend_detach); 2253