dvb_frontend.c revision e23d9ae343f9d196382ab213612d76126f9c99af
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; 109 struct dvb_fe_events events; 110 struct semaphore sem; 111 struct list_head list_head; 112 wait_queue_head_t wait_queue; 113 struct task_struct *thread; 114 unsigned long release_jiffies; 115 unsigned int exit; 116 unsigned int wakeup; 117 fe_status_t status; 118 unsigned long tune_mode_flags; 119 unsigned int delay; 120 unsigned int reinitialise; 121 int tone; 122 int voltage; 123 124 /* swzigzag values */ 125 unsigned int state; 126 unsigned int bending; 127 int lnb_drift; 128 unsigned int inversion; 129 unsigned int auto_step; 130 unsigned int auto_sub_step; 131 unsigned int started_auto_step; 132 unsigned int min_delay; 133 unsigned int max_drift; 134 unsigned int step_size; 135 int quality; 136 unsigned int check_wrapped; 137 enum dvbfe_search algo_status; 138}; 139 140static void dvb_frontend_wakeup(struct dvb_frontend *fe); 141 142static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) 143{ 144 struct dvb_frontend_private *fepriv = fe->frontend_priv; 145 struct dvb_fe_events *events = &fepriv->events; 146 struct dvb_frontend_event *e; 147 int wp; 148 149 dprintk ("%s\n", __func__); 150 151 if (mutex_lock_interruptible (&events->mtx)) 152 return; 153 154 wp = (events->eventw + 1) % MAX_EVENT; 155 156 if (wp == events->eventr) { 157 events->overflow = 1; 158 events->eventr = (events->eventr + 1) % MAX_EVENT; 159 } 160 161 e = &events->events[events->eventw]; 162 163 memcpy (&e->parameters, &fepriv->parameters, 164 sizeof (struct dvb_frontend_parameters)); 165 166 if (status & FE_HAS_LOCK) 167 if (fe->ops.get_frontend) 168 fe->ops.get_frontend(fe, &e->parameters); 169 170 events->eventw = wp; 171 172 mutex_unlock(&events->mtx); 173 174 e->status = status; 175 176 wake_up_interruptible (&events->wait_queue); 177} 178 179static int dvb_frontend_get_event(struct dvb_frontend *fe, 180 struct dvb_frontend_event *event, int flags) 181{ 182 struct dvb_frontend_private *fepriv = fe->frontend_priv; 183 struct dvb_fe_events *events = &fepriv->events; 184 185 dprintk ("%s\n", __func__); 186 187 if (events->overflow) { 188 events->overflow = 0; 189 return -EOVERFLOW; 190 } 191 192 if (events->eventw == events->eventr) { 193 int ret; 194 195 if (flags & O_NONBLOCK) 196 return -EWOULDBLOCK; 197 198 up(&fepriv->sem); 199 200 ret = wait_event_interruptible (events->wait_queue, 201 events->eventw != events->eventr); 202 203 if (down_interruptible (&fepriv->sem)) 204 return -ERESTARTSYS; 205 206 if (ret < 0) 207 return ret; 208 } 209 210 if (mutex_lock_interruptible (&events->mtx)) 211 return -ERESTARTSYS; 212 213 memcpy (event, &events->events[events->eventr], 214 sizeof(struct dvb_frontend_event)); 215 216 events->eventr = (events->eventr + 1) % MAX_EVENT; 217 218 mutex_unlock(&events->mtx); 219 220 return 0; 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.inversion; 281 u32 original_frequency = fepriv->parameters.frequency; 282 283 /* are we using autoinversion? */ 284 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 285 (fepriv->parameters.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.frequency += fepriv->lnb_drift; 352 if (autoinversion) 353 fepriv->parameters.inversion = fepriv->inversion; 354 if (fe->ops.set_frontend) 355 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters); 356 if (fe_set_err < 0) { 357 fepriv->state = FESTATE_ERROR; 358 return fe_set_err; 359 } 360 361 fepriv->parameters.frequency = original_frequency; 362 fepriv->parameters.inversion = original_inversion; 363 364 fepriv->auto_sub_step++; 365 return 0; 366} 367 368static void dvb_frontend_swzigzag(struct dvb_frontend *fe) 369{ 370 fe_status_t s = 0; 371 int retval = 0; 372 struct dvb_frontend_private *fepriv = fe->frontend_priv; 373 374 /* if we've got no parameters, just keep idling */ 375 if (fepriv->state & FESTATE_IDLE) { 376 fepriv->delay = 3*HZ; 377 fepriv->quality = 0; 378 return; 379 } 380 381 /* in SCAN mode, we just set the frontend when asked and leave it alone */ 382 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { 383 if (fepriv->state & FESTATE_RETUNE) { 384 if (fe->ops.set_frontend) 385 retval = fe->ops.set_frontend(fe, 386 &fepriv->parameters); 387 if (retval < 0) 388 fepriv->state = FESTATE_ERROR; 389 else 390 fepriv->state = FESTATE_TUNED; 391 } 392 fepriv->delay = 3*HZ; 393 fepriv->quality = 0; 394 return; 395 } 396 397 /* get the frontend status */ 398 if (fepriv->state & FESTATE_RETUNE) { 399 s = 0; 400 } else { 401 if (fe->ops.read_status) 402 fe->ops.read_status(fe, &s); 403 if (s != fepriv->status) { 404 dvb_frontend_add_event(fe, s); 405 fepriv->status = s; 406 } 407 } 408 409 /* if we're not tuned, and we have a lock, move to the TUNED state */ 410 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { 411 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 412 fepriv->state = FESTATE_TUNED; 413 414 /* if we're tuned, then we have determined the correct inversion */ 415 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && 416 (fepriv->parameters.inversion == INVERSION_AUTO)) { 417 fepriv->parameters.inversion = fepriv->inversion; 418 } 419 return; 420 } 421 422 /* if we are tuned already, check we're still locked */ 423 if (fepriv->state & FESTATE_TUNED) { 424 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 425 426 /* we're tuned, and the lock is still good... */ 427 if (s & FE_HAS_LOCK) { 428 return; 429 } else { /* if we _WERE_ tuned, but now don't have a lock */ 430 fepriv->state = FESTATE_ZIGZAG_FAST; 431 fepriv->started_auto_step = fepriv->auto_step; 432 fepriv->check_wrapped = 0; 433 } 434 } 435 436 /* don't actually do anything if we're in the LOSTLOCK state, 437 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ 438 if ((fepriv->state & FESTATE_LOSTLOCK) && 439 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { 440 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 441 return; 442 } 443 444 /* don't do anything if we're in the DISEQC state, since this 445 * might be someone with a motorized dish controlled by DISEQC. 446 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ 447 if (fepriv->state & FESTATE_DISEQC) { 448 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 449 return; 450 } 451 452 /* if we're in the RETUNE state, set everything up for a brand 453 * new scan, keeping the current inversion setting, as the next 454 * tune is _very_ likely to require the same */ 455 if (fepriv->state & FESTATE_RETUNE) { 456 fepriv->lnb_drift = 0; 457 fepriv->auto_step = 0; 458 fepriv->auto_sub_step = 0; 459 fepriv->started_auto_step = 0; 460 fepriv->check_wrapped = 0; 461 } 462 463 /* fast zigzag. */ 464 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { 465 fepriv->delay = fepriv->min_delay; 466 467 /* perform a tune */ 468 retval = dvb_frontend_swzigzag_autotune(fe, 469 fepriv->check_wrapped); 470 if (retval < 0) { 471 return; 472 } else if (retval) { 473 /* OK, if we've run out of trials at the fast speed. 474 * Drop back to slow for the _next_ attempt */ 475 fepriv->state = FESTATE_SEARCHING_SLOW; 476 fepriv->started_auto_step = fepriv->auto_step; 477 return; 478 } 479 fepriv->check_wrapped = 1; 480 481 /* if we've just retuned, enter the ZIGZAG_FAST state. 482 * This ensures we cannot return from an 483 * FE_SET_FRONTEND ioctl before the first frontend tune 484 * occurs */ 485 if (fepriv->state & FESTATE_RETUNE) { 486 fepriv->state = FESTATE_TUNING_FAST; 487 } 488 } 489 490 /* slow zigzag */ 491 if (fepriv->state & FESTATE_SEARCHING_SLOW) { 492 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); 493 494 /* Note: don't bother checking for wrapping; we stay in this 495 * state until we get a lock */ 496 dvb_frontend_swzigzag_autotune(fe, 0); 497 } 498} 499 500static int dvb_frontend_is_exiting(struct dvb_frontend *fe) 501{ 502 struct dvb_frontend_private *fepriv = fe->frontend_priv; 503 504 if (fepriv->exit != DVB_FE_NO_EXIT) 505 return 1; 506 507 if (fepriv->dvbdev->writers == 1) 508 if (time_after(jiffies, fepriv->release_jiffies + 509 dvb_shutdown_timeout * HZ)) 510 return 1; 511 512 return 0; 513} 514 515static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) 516{ 517 struct dvb_frontend_private *fepriv = fe->frontend_priv; 518 519 if (fepriv->wakeup) { 520 fepriv->wakeup = 0; 521 return 1; 522 } 523 return dvb_frontend_is_exiting(fe); 524} 525 526static void dvb_frontend_wakeup(struct dvb_frontend *fe) 527{ 528 struct dvb_frontend_private *fepriv = fe->frontend_priv; 529 530 fepriv->wakeup = 1; 531 wake_up_interruptible(&fepriv->wait_queue); 532} 533 534static int dvb_frontend_thread(void *data) 535{ 536 struct dvb_frontend *fe = data; 537 struct dvb_frontend_private *fepriv = fe->frontend_priv; 538 unsigned long timeout; 539 fe_status_t s; 540 enum dvbfe_algo algo; 541 542 struct dvb_frontend_parameters *params; 543 544 dprintk("%s\n", __func__); 545 546 fepriv->check_wrapped = 0; 547 fepriv->quality = 0; 548 fepriv->delay = 3*HZ; 549 fepriv->status = 0; 550 fepriv->wakeup = 0; 551 fepriv->reinitialise = 0; 552 553 dvb_frontend_init(fe); 554 555 set_freezable(); 556 while (1) { 557 up(&fepriv->sem); /* is locked when we enter the thread... */ 558restart: 559 timeout = wait_event_interruptible_timeout(fepriv->wait_queue, 560 dvb_frontend_should_wakeup(fe) || kthread_should_stop() 561 || freezing(current), 562 fepriv->delay); 563 564 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { 565 /* got signal or quitting */ 566 fepriv->exit = DVB_FE_NORMAL_EXIT; 567 break; 568 } 569 570 if (try_to_freeze()) 571 goto restart; 572 573 if (down_interruptible(&fepriv->sem)) 574 break; 575 576 if (fepriv->reinitialise) { 577 dvb_frontend_init(fe); 578 if (fepriv->tone != -1) { 579 fe->ops.set_tone(fe, fepriv->tone); 580 } 581 if (fepriv->voltage != -1) { 582 fe->ops.set_voltage(fe, fepriv->voltage); 583 } 584 fepriv->reinitialise = 0; 585 } 586 587 /* do an iteration of the tuning loop */ 588 if (fe->ops.get_frontend_algo) { 589 algo = fe->ops.get_frontend_algo(fe); 590 switch (algo) { 591 case DVBFE_ALGO_HW: 592 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); 593 params = NULL; /* have we been asked to RETUNE ? */ 594 595 if (fepriv->state & FESTATE_RETUNE) { 596 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__); 597 params = &fepriv->parameters; 598 fepriv->state = FESTATE_TUNED; 599 } 600 601 if (fe->ops.tune) 602 fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s); 603 604 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { 605 dprintk("%s: state changed, adding current state\n", __func__); 606 dvb_frontend_add_event(fe, s); 607 fepriv->status = s; 608 } 609 break; 610 case DVBFE_ALGO_SW: 611 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); 612 dvb_frontend_swzigzag(fe); 613 break; 614 case DVBFE_ALGO_CUSTOM: 615 params = NULL; /* have we been asked to RETUNE ? */ 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 params = &fepriv->parameters; 620 fepriv->state = FESTATE_TUNED; 621 } 622 /* Case where we are going to search for a carrier 623 * User asked us to retune again for some reason, possibly 624 * requesting a search with a new set of parameters 625 */ 626 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { 627 if (fe->ops.search) { 628 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters); 629 /* We did do a search as was requested, the flags are 630 * now unset as well and has the flags wrt to search. 631 */ 632 } else { 633 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; 634 } 635 } 636 /* Track the carrier if the search was successful */ 637 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) { 638 if (fe->ops.track) 639 fe->ops.track(fe, &fepriv->parameters); 640 } else { 641 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 642 fepriv->delay = HZ / 2; 643 } 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 int i; 864 865 memset(&(fe->dtv_property_cache), 0, 866 sizeof(struct dtv_frontend_properties)); 867 868 fe->dtv_property_cache.state = DTV_CLEAR; 869 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED; 870 fe->dtv_property_cache.inversion = INVERSION_AUTO; 871 fe->dtv_property_cache.fec_inner = FEC_AUTO; 872 fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO; 873 fe->dtv_property_cache.bandwidth_hz = BANDWIDTH_AUTO; 874 fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO; 875 fe->dtv_property_cache.hierarchy = HIERARCHY_AUTO; 876 fe->dtv_property_cache.symbol_rate = QAM_AUTO; 877 fe->dtv_property_cache.code_rate_HP = FEC_AUTO; 878 fe->dtv_property_cache.code_rate_LP = FEC_AUTO; 879 880 fe->dtv_property_cache.isdbt_partial_reception = -1; 881 fe->dtv_property_cache.isdbt_sb_mode = -1; 882 fe->dtv_property_cache.isdbt_sb_subchannel = -1; 883 fe->dtv_property_cache.isdbt_sb_segment_idx = -1; 884 fe->dtv_property_cache.isdbt_sb_segment_count = -1; 885 fe->dtv_property_cache.isdbt_layer_enabled = 0x7; 886 for (i = 0; i < 3; i++) { 887 fe->dtv_property_cache.layer[i].fec = FEC_AUTO; 888 fe->dtv_property_cache.layer[i].modulation = QAM_AUTO; 889 fe->dtv_property_cache.layer[i].interleaving = -1; 890 fe->dtv_property_cache.layer[i].segment_count = -1; 891 } 892 893 return 0; 894} 895 896#define _DTV_CMD(n, s, b) \ 897[n] = { \ 898 .name = #n, \ 899 .cmd = n, \ 900 .set = s,\ 901 .buffer = b \ 902} 903 904static struct dtv_cmds_h dtv_cmds[] = { 905 _DTV_CMD(DTV_TUNE, 1, 0), 906 _DTV_CMD(DTV_CLEAR, 1, 0), 907 908 /* Set */ 909 _DTV_CMD(DTV_FREQUENCY, 1, 0), 910 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), 911 _DTV_CMD(DTV_MODULATION, 1, 0), 912 _DTV_CMD(DTV_INVERSION, 1, 0), 913 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), 914 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), 915 _DTV_CMD(DTV_INNER_FEC, 1, 0), 916 _DTV_CMD(DTV_VOLTAGE, 1, 0), 917 _DTV_CMD(DTV_TONE, 1, 0), 918 _DTV_CMD(DTV_PILOT, 1, 0), 919 _DTV_CMD(DTV_ROLLOFF, 1, 0), 920 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), 921 _DTV_CMD(DTV_HIERARCHY, 1, 0), 922 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), 923 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), 924 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), 925 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), 926 927 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), 928 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), 929 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), 930 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), 931 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), 932 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), 933 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), 934 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), 935 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), 936 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), 937 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), 938 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), 939 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), 940 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), 941 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), 942 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), 943 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), 944 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), 945 946 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0), 947 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0), 948 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0), 949 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0), 950 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0), 951 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0), 952 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0), 953 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0), 954 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0), 955 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0), 956 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0), 957 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0), 958 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0), 959 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0), 960 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0), 961 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0), 962 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0), 963 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0), 964 965 _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0), 966 967 /* Get */ 968 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), 969 _DTV_CMD(DTV_API_VERSION, 0, 0), 970 _DTV_CMD(DTV_CODE_RATE_HP, 0, 0), 971 _DTV_CMD(DTV_CODE_RATE_LP, 0, 0), 972 _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0), 973 _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0), 974 _DTV_CMD(DTV_HIERARCHY, 0, 0), 975}; 976 977static void dtv_property_dump(struct dtv_property *tvp) 978{ 979 int i; 980 981 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) { 982 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n", 983 __func__, tvp->cmd); 984 return; 985 } 986 987 dprintk("%s() tvp.cmd = 0x%08x (%s)\n" 988 ,__func__ 989 ,tvp->cmd 990 ,dtv_cmds[ tvp->cmd ].name); 991 992 if(dtv_cmds[ tvp->cmd ].buffer) { 993 994 dprintk("%s() tvp.u.buffer.len = 0x%02x\n" 995 ,__func__ 996 ,tvp->u.buffer.len); 997 998 for(i = 0; i < tvp->u.buffer.len; i++) 999 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n" 1000 ,__func__ 1001 ,i 1002 ,tvp->u.buffer.data[i]); 1003 1004 } else 1005 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data); 1006} 1007 1008static int is_legacy_delivery_system(fe_delivery_system_t s) 1009{ 1010 if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) || 1011 (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) || 1012 (s == SYS_ATSC)) 1013 return 1; 1014 1015 return 0; 1016} 1017 1018/* Synchronise the legacy tuning parameters into the cache, so that demodulator 1019 * drivers can use a single set_frontend tuning function, regardless of whether 1020 * it's being used for the legacy or new API, reducing code and complexity. 1021 */ 1022static void dtv_property_cache_sync(struct dvb_frontend *fe, 1023 struct dvb_frontend_parameters *p) 1024{ 1025 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1026 1027 c->frequency = p->frequency; 1028 c->inversion = p->inversion; 1029 1030 switch (fe->ops.info.type) { 1031 case FE_QPSK: 1032 c->modulation = QPSK; /* implied for DVB-S in legacy API */ 1033 c->rolloff = ROLLOFF_35;/* implied for DVB-S */ 1034 c->symbol_rate = p->u.qpsk.symbol_rate; 1035 c->fec_inner = p->u.qpsk.fec_inner; 1036 c->delivery_system = SYS_DVBS; 1037 break; 1038 case FE_QAM: 1039 c->symbol_rate = p->u.qam.symbol_rate; 1040 c->fec_inner = p->u.qam.fec_inner; 1041 c->modulation = p->u.qam.modulation; 1042 c->delivery_system = SYS_DVBC_ANNEX_AC; 1043 break; 1044 case FE_OFDM: 1045 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ) 1046 c->bandwidth_hz = 6000000; 1047 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ) 1048 c->bandwidth_hz = 7000000; 1049 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ) 1050 c->bandwidth_hz = 8000000; 1051 else 1052 /* Including BANDWIDTH_AUTO */ 1053 c->bandwidth_hz = 0; 1054 c->code_rate_HP = p->u.ofdm.code_rate_HP; 1055 c->code_rate_LP = p->u.ofdm.code_rate_LP; 1056 c->modulation = p->u.ofdm.constellation; 1057 c->transmission_mode = p->u.ofdm.transmission_mode; 1058 c->guard_interval = p->u.ofdm.guard_interval; 1059 c->hierarchy = p->u.ofdm.hierarchy_information; 1060 c->delivery_system = SYS_DVBT; 1061 break; 1062 case FE_ATSC: 1063 c->modulation = p->u.vsb.modulation; 1064 if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) 1065 c->delivery_system = SYS_ATSC; 1066 else 1067 c->delivery_system = SYS_DVBC_ANNEX_B; 1068 break; 1069 } 1070} 1071 1072/* Ensure the cached values are set correctly in the frontend 1073 * legacy tuning structures, for the advanced tuning API. 1074 */ 1075static void dtv_property_legacy_params_sync(struct dvb_frontend *fe) 1076{ 1077 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1078 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1079 struct dvb_frontend_parameters *p = &fepriv->parameters; 1080 1081 p->frequency = c->frequency; 1082 p->inversion = c->inversion; 1083 1084 switch (fe->ops.info.type) { 1085 case FE_QPSK: 1086 dprintk("%s() Preparing QPSK req\n", __func__); 1087 p->u.qpsk.symbol_rate = c->symbol_rate; 1088 p->u.qpsk.fec_inner = c->fec_inner; 1089 break; 1090 case FE_QAM: 1091 dprintk("%s() Preparing QAM req\n", __func__); 1092 p->u.qam.symbol_rate = c->symbol_rate; 1093 p->u.qam.fec_inner = c->fec_inner; 1094 p->u.qam.modulation = c->modulation; 1095 break; 1096 case FE_OFDM: 1097 dprintk("%s() Preparing OFDM req\n", __func__); 1098 if (c->bandwidth_hz == 6000000) 1099 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1100 else if (c->bandwidth_hz == 7000000) 1101 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1102 else if (c->bandwidth_hz == 8000000) 1103 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1104 else 1105 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1106 p->u.ofdm.code_rate_HP = c->code_rate_HP; 1107 p->u.ofdm.code_rate_LP = c->code_rate_LP; 1108 p->u.ofdm.constellation = c->modulation; 1109 p->u.ofdm.transmission_mode = c->transmission_mode; 1110 p->u.ofdm.guard_interval = c->guard_interval; 1111 p->u.ofdm.hierarchy_information = c->hierarchy; 1112 break; 1113 case FE_ATSC: 1114 dprintk("%s() Preparing VSB req\n", __func__); 1115 p->u.vsb.modulation = c->modulation; 1116 break; 1117 } 1118} 1119 1120/* Ensure the cached values are set correctly in the frontend 1121 * legacy tuning structures, for the legacy tuning API. 1122 */ 1123static void dtv_property_adv_params_sync(struct dvb_frontend *fe) 1124{ 1125 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1126 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1127 struct dvb_frontend_parameters *p = &fepriv->parameters; 1128 1129 p->frequency = c->frequency; 1130 p->inversion = c->inversion; 1131 1132 switch(c->modulation) { 1133 case PSK_8: 1134 case APSK_16: 1135 case APSK_32: 1136 case QPSK: 1137 p->u.qpsk.symbol_rate = c->symbol_rate; 1138 p->u.qpsk.fec_inner = c->fec_inner; 1139 break; 1140 default: 1141 break; 1142 } 1143 1144 /* Fake out a generic DVB-T request so we pass validation in the ioctl */ 1145 if ((c->delivery_system == SYS_ISDBT) || 1146 (c->delivery_system == SYS_DVBT2)) { 1147 p->u.ofdm.constellation = QAM_AUTO; 1148 p->u.ofdm.code_rate_HP = FEC_AUTO; 1149 p->u.ofdm.code_rate_LP = FEC_AUTO; 1150 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO; 1151 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO; 1152 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO; 1153 if (c->bandwidth_hz == 8000000) 1154 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; 1155 else if (c->bandwidth_hz == 7000000) 1156 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; 1157 else if (c->bandwidth_hz == 6000000) 1158 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; 1159 else 1160 p->u.ofdm.bandwidth = BANDWIDTH_AUTO; 1161 } 1162} 1163 1164static void dtv_property_cache_submit(struct dvb_frontend *fe) 1165{ 1166 const struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1167 1168 /* For legacy delivery systems we don't need the delivery_system to 1169 * be specified, but we populate the older structures from the cache 1170 * so we can call set_frontend on older drivers. 1171 */ 1172 if(is_legacy_delivery_system(c->delivery_system)) { 1173 1174 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation); 1175 dtv_property_legacy_params_sync(fe); 1176 1177 } else { 1178 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation); 1179 1180 /* For advanced delivery systems / modulation types ... 1181 * we seed the lecacy dvb_frontend_parameters structure 1182 * so that the sanity checking code later in the IOCTL processing 1183 * can validate our basic frequency ranges, symbolrates, modulation 1184 * etc. 1185 */ 1186 dtv_property_adv_params_sync(fe); 1187 } 1188} 1189 1190static int dvb_frontend_ioctl_legacy(struct file *file, 1191 unsigned int cmd, void *parg); 1192static int dvb_frontend_ioctl_properties(struct file *file, 1193 unsigned int cmd, void *parg); 1194 1195static int dtv_property_process_get(struct dvb_frontend *fe, 1196 struct dtv_property *tvp, 1197 struct file *file) 1198{ 1199 int r; 1200 1201 switch(tvp->cmd) { 1202 case DTV_FREQUENCY: 1203 tvp->u.data = fe->dtv_property_cache.frequency; 1204 break; 1205 case DTV_MODULATION: 1206 tvp->u.data = fe->dtv_property_cache.modulation; 1207 break; 1208 case DTV_BANDWIDTH_HZ: 1209 tvp->u.data = fe->dtv_property_cache.bandwidth_hz; 1210 break; 1211 case DTV_INVERSION: 1212 tvp->u.data = fe->dtv_property_cache.inversion; 1213 break; 1214 case DTV_SYMBOL_RATE: 1215 tvp->u.data = fe->dtv_property_cache.symbol_rate; 1216 break; 1217 case DTV_INNER_FEC: 1218 tvp->u.data = fe->dtv_property_cache.fec_inner; 1219 break; 1220 case DTV_PILOT: 1221 tvp->u.data = fe->dtv_property_cache.pilot; 1222 break; 1223 case DTV_ROLLOFF: 1224 tvp->u.data = fe->dtv_property_cache.rolloff; 1225 break; 1226 case DTV_DELIVERY_SYSTEM: 1227 tvp->u.data = fe->dtv_property_cache.delivery_system; 1228 break; 1229 case DTV_VOLTAGE: 1230 tvp->u.data = fe->dtv_property_cache.voltage; 1231 break; 1232 case DTV_TONE: 1233 tvp->u.data = fe->dtv_property_cache.sectone; 1234 break; 1235 case DTV_API_VERSION: 1236 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; 1237 break; 1238 case DTV_CODE_RATE_HP: 1239 tvp->u.data = fe->dtv_property_cache.code_rate_HP; 1240 break; 1241 case DTV_CODE_RATE_LP: 1242 tvp->u.data = fe->dtv_property_cache.code_rate_LP; 1243 break; 1244 case DTV_GUARD_INTERVAL: 1245 tvp->u.data = fe->dtv_property_cache.guard_interval; 1246 break; 1247 case DTV_TRANSMISSION_MODE: 1248 tvp->u.data = fe->dtv_property_cache.transmission_mode; 1249 break; 1250 case DTV_HIERARCHY: 1251 tvp->u.data = fe->dtv_property_cache.hierarchy; 1252 break; 1253 1254 /* ISDB-T Support here */ 1255 case DTV_ISDBT_PARTIAL_RECEPTION: 1256 tvp->u.data = fe->dtv_property_cache.isdbt_partial_reception; 1257 break; 1258 case DTV_ISDBT_SOUND_BROADCASTING: 1259 tvp->u.data = fe->dtv_property_cache.isdbt_sb_mode; 1260 break; 1261 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1262 tvp->u.data = fe->dtv_property_cache.isdbt_sb_subchannel; 1263 break; 1264 case DTV_ISDBT_SB_SEGMENT_IDX: 1265 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_idx; 1266 break; 1267 case DTV_ISDBT_SB_SEGMENT_COUNT: 1268 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_count; 1269 break; 1270 case DTV_ISDBT_LAYER_ENABLED: 1271 tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled; 1272 break; 1273 case DTV_ISDBT_LAYERA_FEC: 1274 tvp->u.data = fe->dtv_property_cache.layer[0].fec; 1275 break; 1276 case DTV_ISDBT_LAYERA_MODULATION: 1277 tvp->u.data = fe->dtv_property_cache.layer[0].modulation; 1278 break; 1279 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1280 tvp->u.data = fe->dtv_property_cache.layer[0].segment_count; 1281 break; 1282 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1283 tvp->u.data = fe->dtv_property_cache.layer[0].interleaving; 1284 break; 1285 case DTV_ISDBT_LAYERB_FEC: 1286 tvp->u.data = fe->dtv_property_cache.layer[1].fec; 1287 break; 1288 case DTV_ISDBT_LAYERB_MODULATION: 1289 tvp->u.data = fe->dtv_property_cache.layer[1].modulation; 1290 break; 1291 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1292 tvp->u.data = fe->dtv_property_cache.layer[1].segment_count; 1293 break; 1294 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1295 tvp->u.data = fe->dtv_property_cache.layer[1].interleaving; 1296 break; 1297 case DTV_ISDBT_LAYERC_FEC: 1298 tvp->u.data = fe->dtv_property_cache.layer[2].fec; 1299 break; 1300 case DTV_ISDBT_LAYERC_MODULATION: 1301 tvp->u.data = fe->dtv_property_cache.layer[2].modulation; 1302 break; 1303 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1304 tvp->u.data = fe->dtv_property_cache.layer[2].segment_count; 1305 break; 1306 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1307 tvp->u.data = fe->dtv_property_cache.layer[2].interleaving; 1308 break; 1309 case DTV_ISDBS_TS_ID: 1310 tvp->u.data = fe->dtv_property_cache.isdbs_ts_id; 1311 break; 1312 case DTV_DVBT2_PLP_ID: 1313 tvp->u.data = fe->dtv_property_cache.dvbt2_plp_id; 1314 break; 1315 default: 1316 return -EINVAL; 1317 } 1318 1319 /* Allow the frontend to override outgoing properties */ 1320 if (fe->ops.get_property) { 1321 r = fe->ops.get_property(fe, tvp); 1322 if (r < 0) 1323 return r; 1324 } 1325 1326 dtv_property_dump(tvp); 1327 1328 return 0; 1329} 1330 1331static int dtv_property_process_set(struct dvb_frontend *fe, 1332 struct dtv_property *tvp, 1333 struct file *file) 1334{ 1335 int r = 0; 1336 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1337 dtv_property_dump(tvp); 1338 1339 /* Allow the frontend to validate incoming properties */ 1340 if (fe->ops.set_property) { 1341 r = fe->ops.set_property(fe, tvp); 1342 if (r < 0) 1343 return r; 1344 } 1345 1346 switch(tvp->cmd) { 1347 case DTV_CLEAR: 1348 /* Reset a cache of data specific to the frontend here. This does 1349 * not effect hardware. 1350 */ 1351 dvb_frontend_clear_cache(fe); 1352 dprintk("%s() Flushing property cache\n", __func__); 1353 break; 1354 case DTV_TUNE: 1355 /* interpret the cache of data, build either a traditional frontend 1356 * tunerequest so we can pass validation in the FE_SET_FRONTEND 1357 * ioctl. 1358 */ 1359 fe->dtv_property_cache.state = tvp->cmd; 1360 dprintk("%s() Finalised property cache\n", __func__); 1361 dtv_property_cache_submit(fe); 1362 1363 r = dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND, 1364 &fepriv->parameters); 1365 break; 1366 case DTV_FREQUENCY: 1367 fe->dtv_property_cache.frequency = tvp->u.data; 1368 break; 1369 case DTV_MODULATION: 1370 fe->dtv_property_cache.modulation = tvp->u.data; 1371 break; 1372 case DTV_BANDWIDTH_HZ: 1373 fe->dtv_property_cache.bandwidth_hz = tvp->u.data; 1374 break; 1375 case DTV_INVERSION: 1376 fe->dtv_property_cache.inversion = tvp->u.data; 1377 break; 1378 case DTV_SYMBOL_RATE: 1379 fe->dtv_property_cache.symbol_rate = tvp->u.data; 1380 break; 1381 case DTV_INNER_FEC: 1382 fe->dtv_property_cache.fec_inner = tvp->u.data; 1383 break; 1384 case DTV_PILOT: 1385 fe->dtv_property_cache.pilot = tvp->u.data; 1386 break; 1387 case DTV_ROLLOFF: 1388 fe->dtv_property_cache.rolloff = tvp->u.data; 1389 break; 1390 case DTV_DELIVERY_SYSTEM: 1391 fe->dtv_property_cache.delivery_system = tvp->u.data; 1392 break; 1393 case DTV_VOLTAGE: 1394 fe->dtv_property_cache.voltage = tvp->u.data; 1395 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE, 1396 (void *)fe->dtv_property_cache.voltage); 1397 break; 1398 case DTV_TONE: 1399 fe->dtv_property_cache.sectone = tvp->u.data; 1400 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE, 1401 (void *)fe->dtv_property_cache.sectone); 1402 break; 1403 case DTV_CODE_RATE_HP: 1404 fe->dtv_property_cache.code_rate_HP = tvp->u.data; 1405 break; 1406 case DTV_CODE_RATE_LP: 1407 fe->dtv_property_cache.code_rate_LP = tvp->u.data; 1408 break; 1409 case DTV_GUARD_INTERVAL: 1410 fe->dtv_property_cache.guard_interval = tvp->u.data; 1411 break; 1412 case DTV_TRANSMISSION_MODE: 1413 fe->dtv_property_cache.transmission_mode = tvp->u.data; 1414 break; 1415 case DTV_HIERARCHY: 1416 fe->dtv_property_cache.hierarchy = tvp->u.data; 1417 break; 1418 1419 /* ISDB-T Support here */ 1420 case DTV_ISDBT_PARTIAL_RECEPTION: 1421 fe->dtv_property_cache.isdbt_partial_reception = tvp->u.data; 1422 break; 1423 case DTV_ISDBT_SOUND_BROADCASTING: 1424 fe->dtv_property_cache.isdbt_sb_mode = tvp->u.data; 1425 break; 1426 case DTV_ISDBT_SB_SUBCHANNEL_ID: 1427 fe->dtv_property_cache.isdbt_sb_subchannel = tvp->u.data; 1428 break; 1429 case DTV_ISDBT_SB_SEGMENT_IDX: 1430 fe->dtv_property_cache.isdbt_sb_segment_idx = tvp->u.data; 1431 break; 1432 case DTV_ISDBT_SB_SEGMENT_COUNT: 1433 fe->dtv_property_cache.isdbt_sb_segment_count = tvp->u.data; 1434 break; 1435 case DTV_ISDBT_LAYER_ENABLED: 1436 fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data; 1437 break; 1438 case DTV_ISDBT_LAYERA_FEC: 1439 fe->dtv_property_cache.layer[0].fec = tvp->u.data; 1440 break; 1441 case DTV_ISDBT_LAYERA_MODULATION: 1442 fe->dtv_property_cache.layer[0].modulation = tvp->u.data; 1443 break; 1444 case DTV_ISDBT_LAYERA_SEGMENT_COUNT: 1445 fe->dtv_property_cache.layer[0].segment_count = tvp->u.data; 1446 break; 1447 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: 1448 fe->dtv_property_cache.layer[0].interleaving = tvp->u.data; 1449 break; 1450 case DTV_ISDBT_LAYERB_FEC: 1451 fe->dtv_property_cache.layer[1].fec = tvp->u.data; 1452 break; 1453 case DTV_ISDBT_LAYERB_MODULATION: 1454 fe->dtv_property_cache.layer[1].modulation = tvp->u.data; 1455 break; 1456 case DTV_ISDBT_LAYERB_SEGMENT_COUNT: 1457 fe->dtv_property_cache.layer[1].segment_count = tvp->u.data; 1458 break; 1459 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: 1460 fe->dtv_property_cache.layer[1].interleaving = tvp->u.data; 1461 break; 1462 case DTV_ISDBT_LAYERC_FEC: 1463 fe->dtv_property_cache.layer[2].fec = tvp->u.data; 1464 break; 1465 case DTV_ISDBT_LAYERC_MODULATION: 1466 fe->dtv_property_cache.layer[2].modulation = tvp->u.data; 1467 break; 1468 case DTV_ISDBT_LAYERC_SEGMENT_COUNT: 1469 fe->dtv_property_cache.layer[2].segment_count = tvp->u.data; 1470 break; 1471 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: 1472 fe->dtv_property_cache.layer[2].interleaving = tvp->u.data; 1473 break; 1474 case DTV_ISDBS_TS_ID: 1475 fe->dtv_property_cache.isdbs_ts_id = tvp->u.data; 1476 break; 1477 case DTV_DVBT2_PLP_ID: 1478 fe->dtv_property_cache.dvbt2_plp_id = tvp->u.data; 1479 break; 1480 default: 1481 return -EINVAL; 1482 } 1483 1484 return r; 1485} 1486 1487static int dvb_frontend_ioctl(struct file *file, 1488 unsigned int cmd, void *parg) 1489{ 1490 struct dvb_device *dvbdev = file->private_data; 1491 struct dvb_frontend *fe = dvbdev->priv; 1492 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1493 int err = -EOPNOTSUPP; 1494 1495 dprintk("%s (%d)\n", __func__, _IOC_NR(cmd)); 1496 1497 if (fepriv->exit != DVB_FE_NO_EXIT) 1498 return -ENODEV; 1499 1500 if ((file->f_flags & O_ACCMODE) == O_RDONLY && 1501 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || 1502 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) 1503 return -EPERM; 1504 1505 if (down_interruptible (&fepriv->sem)) 1506 return -ERESTARTSYS; 1507 1508 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY)) 1509 err = dvb_frontend_ioctl_properties(file, cmd, parg); 1510 else { 1511 fe->dtv_property_cache.state = DTV_UNDEFINED; 1512 err = dvb_frontend_ioctl_legacy(file, cmd, parg); 1513 } 1514 1515 up(&fepriv->sem); 1516 return err; 1517} 1518 1519static int dvb_frontend_ioctl_properties(struct file *file, 1520 unsigned int cmd, void *parg) 1521{ 1522 struct dvb_device *dvbdev = file->private_data; 1523 struct dvb_frontend *fe = dvbdev->priv; 1524 int err = 0; 1525 1526 struct dtv_properties *tvps = NULL; 1527 struct dtv_property *tvp = NULL; 1528 int i; 1529 1530 dprintk("%s\n", __func__); 1531 1532 if(cmd == FE_SET_PROPERTY) { 1533 tvps = (struct dtv_properties __user *)parg; 1534 1535 dprintk("%s() properties.num = %d\n", __func__, tvps->num); 1536 dprintk("%s() properties.props = %p\n", __func__, tvps->props); 1537 1538 /* Put an arbitrary limit on the number of messages that can 1539 * be sent at once */ 1540 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1541 return -EINVAL; 1542 1543 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1544 if (!tvp) { 1545 err = -ENOMEM; 1546 goto out; 1547 } 1548 1549 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1550 err = -EFAULT; 1551 goto out; 1552 } 1553 1554 for (i = 0; i < tvps->num; i++) { 1555 err = dtv_property_process_set(fe, tvp + i, file); 1556 if (err < 0) 1557 goto out; 1558 (tvp + i)->result = err; 1559 } 1560 1561 if(fe->dtv_property_cache.state == DTV_TUNE) 1562 dprintk("%s() Property cache is full, tuning\n", __func__); 1563 1564 } else 1565 if(cmd == FE_GET_PROPERTY) { 1566 1567 tvps = (struct dtv_properties __user *)parg; 1568 1569 dprintk("%s() properties.num = %d\n", __func__, tvps->num); 1570 dprintk("%s() properties.props = %p\n", __func__, tvps->props); 1571 1572 /* Put an arbitrary limit on the number of messages that can 1573 * be sent at once */ 1574 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) 1575 return -EINVAL; 1576 1577 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL); 1578 if (!tvp) { 1579 err = -ENOMEM; 1580 goto out; 1581 } 1582 1583 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { 1584 err = -EFAULT; 1585 goto out; 1586 } 1587 1588 for (i = 0; i < tvps->num; i++) { 1589 err = dtv_property_process_get(fe, tvp + i, file); 1590 if (err < 0) 1591 goto out; 1592 (tvp + i)->result = err; 1593 } 1594 1595 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) { 1596 err = -EFAULT; 1597 goto out; 1598 } 1599 1600 } else 1601 err = -EOPNOTSUPP; 1602 1603out: 1604 kfree(tvp); 1605 return err; 1606} 1607 1608static int dvb_frontend_ioctl_legacy(struct file *file, 1609 unsigned int cmd, void *parg) 1610{ 1611 struct dvb_device *dvbdev = file->private_data; 1612 struct dvb_frontend *fe = dvbdev->priv; 1613 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1614 int cb_err, err = -EOPNOTSUPP; 1615 1616 if (fe->dvb->fe_ioctl_override) { 1617 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg, 1618 DVB_FE_IOCTL_PRE); 1619 if (cb_err < 0) 1620 return cb_err; 1621 if (cb_err > 0) 1622 return 0; 1623 /* fe_ioctl_override returning 0 allows 1624 * dvb-core to continue handling the ioctl */ 1625 } 1626 1627 switch (cmd) { 1628 case FE_GET_INFO: { 1629 struct dvb_frontend_info* info = parg; 1630 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); 1631 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max); 1632 1633 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't 1634 * do it, it is done for it. */ 1635 info->caps |= FE_CAN_INVERSION_AUTO; 1636 err = 0; 1637 break; 1638 } 1639 1640 case FE_READ_STATUS: { 1641 fe_status_t* status = parg; 1642 1643 /* if retune was requested but hasn't occurred yet, prevent 1644 * that user get signal state from previous tuning */ 1645 if (fepriv->state == FESTATE_RETUNE || 1646 fepriv->state == FESTATE_ERROR) { 1647 err=0; 1648 *status = 0; 1649 break; 1650 } 1651 1652 if (fe->ops.read_status) 1653 err = fe->ops.read_status(fe, status); 1654 break; 1655 } 1656 case FE_READ_BER: 1657 if (fe->ops.read_ber) 1658 err = fe->ops.read_ber(fe, (__u32*) parg); 1659 break; 1660 1661 case FE_READ_SIGNAL_STRENGTH: 1662 if (fe->ops.read_signal_strength) 1663 err = fe->ops.read_signal_strength(fe, (__u16*) parg); 1664 break; 1665 1666 case FE_READ_SNR: 1667 if (fe->ops.read_snr) 1668 err = fe->ops.read_snr(fe, (__u16*) parg); 1669 break; 1670 1671 case FE_READ_UNCORRECTED_BLOCKS: 1672 if (fe->ops.read_ucblocks) 1673 err = fe->ops.read_ucblocks(fe, (__u32*) parg); 1674 break; 1675 1676 1677 case FE_DISEQC_RESET_OVERLOAD: 1678 if (fe->ops.diseqc_reset_overload) { 1679 err = fe->ops.diseqc_reset_overload(fe); 1680 fepriv->state = FESTATE_DISEQC; 1681 fepriv->status = 0; 1682 } 1683 break; 1684 1685 case FE_DISEQC_SEND_MASTER_CMD: 1686 if (fe->ops.diseqc_send_master_cmd) { 1687 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); 1688 fepriv->state = FESTATE_DISEQC; 1689 fepriv->status = 0; 1690 } 1691 break; 1692 1693 case FE_DISEQC_SEND_BURST: 1694 if (fe->ops.diseqc_send_burst) { 1695 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); 1696 fepriv->state = FESTATE_DISEQC; 1697 fepriv->status = 0; 1698 } 1699 break; 1700 1701 case FE_SET_TONE: 1702 if (fe->ops.set_tone) { 1703 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); 1704 fepriv->tone = (fe_sec_tone_mode_t) parg; 1705 fepriv->state = FESTATE_DISEQC; 1706 fepriv->status = 0; 1707 } 1708 break; 1709 1710 case FE_SET_VOLTAGE: 1711 if (fe->ops.set_voltage) { 1712 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); 1713 fepriv->voltage = (fe_sec_voltage_t) parg; 1714 fepriv->state = FESTATE_DISEQC; 1715 fepriv->status = 0; 1716 } 1717 break; 1718 1719 case FE_DISHNETWORK_SEND_LEGACY_CMD: 1720 if (fe->ops.dishnetwork_send_legacy_command) { 1721 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); 1722 fepriv->state = FESTATE_DISEQC; 1723 fepriv->status = 0; 1724 } else if (fe->ops.set_voltage) { 1725 /* 1726 * NOTE: This is a fallback condition. Some frontends 1727 * (stv0299 for instance) take longer than 8msec to 1728 * respond to a set_voltage command. Those switches 1729 * need custom routines to switch properly. For all 1730 * other frontends, the following should work ok. 1731 * Dish network legacy switches (as used by Dish500) 1732 * are controlled by sending 9-bit command words 1733 * spaced 8msec apart. 1734 * the actual command word is switch/port dependent 1735 * so it is up to the userspace application to send 1736 * the right command. 1737 * The command must always start with a '0' after 1738 * initialization, so parg is 8 bits and does not 1739 * include the initialization or start bit 1740 */ 1741 unsigned long swcmd = ((unsigned long) parg) << 1; 1742 struct timeval nexttime; 1743 struct timeval tv[10]; 1744 int i; 1745 u8 last = 1; 1746 if (dvb_frontend_debug) 1747 printk("%s switch command: 0x%04lx\n", __func__, swcmd); 1748 do_gettimeofday(&nexttime); 1749 if (dvb_frontend_debug) 1750 memcpy(&tv[0], &nexttime, sizeof(struct timeval)); 1751 /* before sending a command, initialize by sending 1752 * a 32ms 18V to the switch 1753 */ 1754 fe->ops.set_voltage(fe, SEC_VOLTAGE_18); 1755 dvb_frontend_sleep_until(&nexttime, 32000); 1756 1757 for (i = 0; i < 9; i++) { 1758 if (dvb_frontend_debug) 1759 do_gettimeofday(&tv[i + 1]); 1760 if ((swcmd & 0x01) != last) { 1761 /* set voltage to (last ? 13V : 18V) */ 1762 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); 1763 last = (last) ? 0 : 1; 1764 } 1765 swcmd = swcmd >> 1; 1766 if (i != 8) 1767 dvb_frontend_sleep_until(&nexttime, 8000); 1768 } 1769 if (dvb_frontend_debug) { 1770 printk("%s(%d): switch delay (should be 32k followed by all 8k\n", 1771 __func__, fe->dvb->num); 1772 for (i = 1; i < 10; i++) 1773 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); 1774 } 1775 err = 0; 1776 fepriv->state = FESTATE_DISEQC; 1777 fepriv->status = 0; 1778 } 1779 break; 1780 1781 case FE_DISEQC_RECV_SLAVE_REPLY: 1782 if (fe->ops.diseqc_recv_slave_reply) 1783 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); 1784 break; 1785 1786 case FE_ENABLE_HIGH_LNB_VOLTAGE: 1787 if (fe->ops.enable_high_lnb_voltage) 1788 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); 1789 break; 1790 1791 case FE_SET_FRONTEND: { 1792 struct dvb_frontend_tune_settings fetunesettings; 1793 1794 if(fe->dtv_property_cache.state == DTV_TUNE) { 1795 if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) { 1796 err = -EINVAL; 1797 break; 1798 } 1799 } else { 1800 if (dvb_frontend_check_parameters(fe, parg) < 0) { 1801 err = -EINVAL; 1802 break; 1803 } 1804 1805 memcpy (&fepriv->parameters, parg, 1806 sizeof (struct dvb_frontend_parameters)); 1807 dtv_property_cache_sync(fe, &fepriv->parameters); 1808 } 1809 1810 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); 1811 memcpy(&fetunesettings.parameters, parg, 1812 sizeof (struct dvb_frontend_parameters)); 1813 1814 /* force auto frequency inversion if requested */ 1815 if (dvb_force_auto_inversion) { 1816 fepriv->parameters.inversion = INVERSION_AUTO; 1817 fetunesettings.parameters.inversion = INVERSION_AUTO; 1818 } 1819 if (fe->ops.info.type == FE_OFDM) { 1820 /* without hierarchical coding code_rate_LP is irrelevant, 1821 * so we tolerate the otherwise invalid FEC_NONE setting */ 1822 if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE && 1823 fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE) 1824 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO; 1825 } 1826 1827 /* get frontend-specific tuning settings */ 1828 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { 1829 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; 1830 fepriv->max_drift = fetunesettings.max_drift; 1831 fepriv->step_size = fetunesettings.step_size; 1832 } else { 1833 /* default values */ 1834 switch(fe->ops.info.type) { 1835 case FE_QPSK: 1836 fepriv->min_delay = HZ/20; 1837 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000; 1838 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000; 1839 break; 1840 1841 case FE_QAM: 1842 fepriv->min_delay = HZ/20; 1843 fepriv->step_size = 0; /* no zigzag */ 1844 fepriv->max_drift = 0; 1845 break; 1846 1847 case FE_OFDM: 1848 fepriv->min_delay = HZ/20; 1849 fepriv->step_size = fe->ops.info.frequency_stepsize * 2; 1850 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; 1851 break; 1852 case FE_ATSC: 1853 fepriv->min_delay = HZ/20; 1854 fepriv->step_size = 0; 1855 fepriv->max_drift = 0; 1856 break; 1857 } 1858 } 1859 if (dvb_override_tune_delay > 0) 1860 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; 1861 1862 fepriv->state = FESTATE_RETUNE; 1863 1864 /* Request the search algorithm to search */ 1865 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; 1866 1867 dvb_frontend_wakeup(fe); 1868 dvb_frontend_add_event(fe, 0); 1869 fepriv->status = 0; 1870 err = 0; 1871 break; 1872 } 1873 1874 case FE_GET_EVENT: 1875 err = dvb_frontend_get_event (fe, parg, file->f_flags); 1876 break; 1877 1878 case FE_GET_FRONTEND: 1879 if (fe->ops.get_frontend) { 1880 memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters)); 1881 err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg); 1882 } 1883 break; 1884 1885 case FE_SET_FRONTEND_TUNE_MODE: 1886 fepriv->tune_mode_flags = (unsigned long) parg; 1887 err = 0; 1888 break; 1889 }; 1890 1891 if (fe->dvb->fe_ioctl_override) { 1892 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg, 1893 DVB_FE_IOCTL_POST); 1894 if (cb_err < 0) 1895 return cb_err; 1896 } 1897 1898 return err; 1899} 1900 1901 1902static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) 1903{ 1904 struct dvb_device *dvbdev = file->private_data; 1905 struct dvb_frontend *fe = dvbdev->priv; 1906 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1907 1908 dprintk ("%s\n", __func__); 1909 1910 poll_wait (file, &fepriv->events.wait_queue, wait); 1911 1912 if (fepriv->events.eventw != fepriv->events.eventr) 1913 return (POLLIN | POLLRDNORM | POLLPRI); 1914 1915 return 0; 1916} 1917 1918static int dvb_frontend_open(struct inode *inode, struct file *file) 1919{ 1920 struct dvb_device *dvbdev = file->private_data; 1921 struct dvb_frontend *fe = dvbdev->priv; 1922 struct dvb_frontend_private *fepriv = fe->frontend_priv; 1923 struct dvb_adapter *adapter = fe->dvb; 1924 int ret; 1925 1926 dprintk ("%s\n", __func__); 1927 if (fepriv->exit == DVB_FE_DEVICE_REMOVED) 1928 return -ENODEV; 1929 1930 if (adapter->mfe_shared) { 1931 mutex_lock (&adapter->mfe_lock); 1932 1933 if (adapter->mfe_dvbdev == NULL) 1934 adapter->mfe_dvbdev = dvbdev; 1935 1936 else if (adapter->mfe_dvbdev != dvbdev) { 1937 struct dvb_device 1938 *mfedev = adapter->mfe_dvbdev; 1939 struct dvb_frontend 1940 *mfe = mfedev->priv; 1941 struct dvb_frontend_private 1942 *mfepriv = mfe->frontend_priv; 1943 int mferetry = (dvb_mfe_wait_time << 1); 1944 1945 mutex_unlock (&adapter->mfe_lock); 1946 while (mferetry-- && (mfedev->users != -1 || 1947 mfepriv->thread != NULL)) { 1948 if(msleep_interruptible(500)) { 1949 if(signal_pending(current)) 1950 return -EINTR; 1951 } 1952 } 1953 1954 mutex_lock (&adapter->mfe_lock); 1955 if(adapter->mfe_dvbdev != dvbdev) { 1956 mfedev = adapter->mfe_dvbdev; 1957 mfe = mfedev->priv; 1958 mfepriv = mfe->frontend_priv; 1959 if (mfedev->users != -1 || 1960 mfepriv->thread != NULL) { 1961 mutex_unlock (&adapter->mfe_lock); 1962 return -EBUSY; 1963 } 1964 adapter->mfe_dvbdev = dvbdev; 1965 } 1966 } 1967 } 1968 1969 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { 1970 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) 1971 goto err0; 1972 } 1973 1974 if ((ret = dvb_generic_open (inode, file)) < 0) 1975 goto err1; 1976 1977 if ((file->f_flags & O_ACCMODE) != O_RDONLY) { 1978 /* normal tune mode when opened R/W */ 1979 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; 1980 fepriv->tone = -1; 1981 fepriv->voltage = -1; 1982 1983 ret = dvb_frontend_start (fe); 1984 if (ret) 1985 goto err2; 1986 1987 /* empty event queue */ 1988 fepriv->events.eventr = fepriv->events.eventw = 0; 1989 } 1990 1991 if (adapter->mfe_shared) 1992 mutex_unlock (&adapter->mfe_lock); 1993 return ret; 1994 1995err2: 1996 dvb_generic_release(inode, file); 1997err1: 1998 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) 1999 fe->ops.ts_bus_ctrl(fe, 0); 2000err0: 2001 if (adapter->mfe_shared) 2002 mutex_unlock (&adapter->mfe_lock); 2003 return ret; 2004} 2005 2006static int dvb_frontend_release(struct inode *inode, struct file *file) 2007{ 2008 struct dvb_device *dvbdev = file->private_data; 2009 struct dvb_frontend *fe = dvbdev->priv; 2010 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2011 int ret; 2012 2013 dprintk ("%s\n", __func__); 2014 2015 if ((file->f_flags & O_ACCMODE) != O_RDONLY) 2016 fepriv->release_jiffies = jiffies; 2017 2018 ret = dvb_generic_release (inode, file); 2019 2020 if (dvbdev->users == -1) { 2021 if (fepriv->exit != DVB_FE_NO_EXIT) { 2022 fops_put(file->f_op); 2023 file->f_op = NULL; 2024 wake_up(&dvbdev->wait_queue); 2025 } 2026 if (fe->ops.ts_bus_ctrl) 2027 fe->ops.ts_bus_ctrl(fe, 0); 2028 } 2029 2030 return ret; 2031} 2032 2033static const struct file_operations dvb_frontend_fops = { 2034 .owner = THIS_MODULE, 2035 .unlocked_ioctl = dvb_generic_ioctl, 2036 .poll = dvb_frontend_poll, 2037 .open = dvb_frontend_open, 2038 .release = dvb_frontend_release, 2039 .llseek = noop_llseek, 2040}; 2041 2042int dvb_register_frontend(struct dvb_adapter* dvb, 2043 struct dvb_frontend* fe) 2044{ 2045 struct dvb_frontend_private *fepriv; 2046 static const struct dvb_device dvbdev_template = { 2047 .users = ~0, 2048 .writers = 1, 2049 .readers = (~0)-1, 2050 .fops = &dvb_frontend_fops, 2051 .kernel_ioctl = dvb_frontend_ioctl 2052 }; 2053 2054 dprintk ("%s\n", __func__); 2055 2056 if (mutex_lock_interruptible(&frontend_mutex)) 2057 return -ERESTARTSYS; 2058 2059 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); 2060 if (fe->frontend_priv == NULL) { 2061 mutex_unlock(&frontend_mutex); 2062 return -ENOMEM; 2063 } 2064 fepriv = fe->frontend_priv; 2065 2066 sema_init(&fepriv->sem, 1); 2067 init_waitqueue_head (&fepriv->wait_queue); 2068 init_waitqueue_head (&fepriv->events.wait_queue); 2069 mutex_init(&fepriv->events.mtx); 2070 fe->dvb = dvb; 2071 fepriv->inversion = INVERSION_OFF; 2072 2073 printk ("DVB: registering adapter %i frontend %i (%s)...\n", 2074 fe->dvb->num, 2075 fe->id, 2076 fe->ops.info.name); 2077 2078 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, 2079 fe, DVB_DEVICE_FRONTEND); 2080 2081 mutex_unlock(&frontend_mutex); 2082 return 0; 2083} 2084EXPORT_SYMBOL(dvb_register_frontend); 2085 2086int dvb_unregister_frontend(struct dvb_frontend* fe) 2087{ 2088 struct dvb_frontend_private *fepriv = fe->frontend_priv; 2089 dprintk ("%s\n", __func__); 2090 2091 mutex_lock(&frontend_mutex); 2092 dvb_frontend_stop (fe); 2093 mutex_unlock(&frontend_mutex); 2094 2095 if (fepriv->dvbdev->users < -1) 2096 wait_event(fepriv->dvbdev->wait_queue, 2097 fepriv->dvbdev->users==-1); 2098 2099 mutex_lock(&frontend_mutex); 2100 dvb_unregister_device (fepriv->dvbdev); 2101 2102 /* fe is invalid now */ 2103 kfree(fepriv); 2104 mutex_unlock(&frontend_mutex); 2105 return 0; 2106} 2107EXPORT_SYMBOL(dvb_unregister_frontend); 2108 2109#ifdef CONFIG_MEDIA_ATTACH 2110void dvb_frontend_detach(struct dvb_frontend* fe) 2111{ 2112 void *ptr; 2113 2114 if (fe->ops.release_sec) { 2115 fe->ops.release_sec(fe); 2116 symbol_put_addr(fe->ops.release_sec); 2117 } 2118 if (fe->ops.tuner_ops.release) { 2119 fe->ops.tuner_ops.release(fe); 2120 symbol_put_addr(fe->ops.tuner_ops.release); 2121 } 2122 if (fe->ops.analog_ops.release) { 2123 fe->ops.analog_ops.release(fe); 2124 symbol_put_addr(fe->ops.analog_ops.release); 2125 } 2126 ptr = (void*)fe->ops.release; 2127 if (ptr) { 2128 fe->ops.release(fe); 2129 symbol_put_addr(ptr); 2130 } 2131} 2132#else 2133void dvb_frontend_detach(struct dvb_frontend* fe) 2134{ 2135 if (fe->ops.release_sec) 2136 fe->ops.release_sec(fe); 2137 if (fe->ops.tuner_ops.release) 2138 fe->ops.tuner_ops.release(fe); 2139 if (fe->ops.analog_ops.release) 2140 fe->ops.analog_ops.release(fe); 2141 if (fe->ops.release) 2142 fe->ops.release(fe); 2143} 2144#endif 2145EXPORT_SYMBOL(dvb_frontend_detach); 2146