2 * dvb_frontend.c: DVB frontend tuning interface/thread
5 * Copyright (C) 1999-2001 Ralph Metzler
8 * for convergence integrated media GmbH
10 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
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.
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.
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
28 /* Enables DVBv3 compatibility bits at the headers */
31 #include <linux/string.h>
32 #include <linux/kernel.h>
33 #include <linux/sched.h>
34 #include <linux/wait.h>
35 #include <linux/slab.h>
36 #include <linux/poll.h>
37 #include <linux/semaphore.h>
38 #include <linux/module.h>
39 #include <linux/list.h>
40 #include <linux/freezer.h>
41 #include <linux/jiffies.h>
42 #include <linux/kthread.h>
43 #include <asm/processor.h>
45 #include "dvb_frontend.h"
47 #include <linux/dvb/version.h>
49 static int dvb_frontend_debug;
50 static int dvb_shutdown_timeout;
51 static int dvb_force_auto_inversion;
52 static int dvb_override_tune_delay;
53 static int dvb_powerdown_on_sleep = 1;
54 static int dvb_mfe_wait_time = 5;
56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
58 module_param(dvb_shutdown_timeout, int, 0644);
59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
60 module_param(dvb_force_auto_inversion, int, 0644);
61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
62 module_param(dvb_override_tune_delay, int, 0644);
63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
64 module_param(dvb_powerdown_on_sleep, int, 0644);
65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
66 module_param(dvb_mfe_wait_time, int, 0644);
67 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
69 #define FESTATE_IDLE 1
70 #define FESTATE_RETUNE 2
71 #define FESTATE_TUNING_FAST 4
72 #define FESTATE_TUNING_SLOW 8
73 #define FESTATE_TUNED 16
74 #define FESTATE_ZIGZAG_FAST 32
75 #define FESTATE_ZIGZAG_SLOW 64
76 #define FESTATE_DISEQC 128
77 #define FESTATE_ERROR 256
78 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
79 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
80 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
81 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
85 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
86 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
87 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
88 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
89 * FESTATE_TUNED. The frontend has successfully locked on.
90 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
91 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
92 * FESTATE_DISEQC. A DISEQC command has just been issued.
93 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
94 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
95 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
96 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
99 static DEFINE_MUTEX(frontend_mutex);
101 struct dvb_frontend_private {
103 /* thread/frontend values */
104 struct dvb_device *dvbdev;
105 struct dvb_frontend_parameters parameters_out;
106 struct dvb_fe_events events;
107 struct semaphore sem;
108 struct list_head list_head;
109 wait_queue_head_t wait_queue;
110 struct task_struct *thread;
111 unsigned long release_jiffies;
114 unsigned long tune_mode_flags;
116 unsigned int reinitialise;
120 /* swzigzag values */
122 unsigned int bending;
124 unsigned int inversion;
125 unsigned int auto_step;
126 unsigned int auto_sub_step;
127 unsigned int started_auto_step;
128 unsigned int min_delay;
129 unsigned int max_drift;
130 unsigned int step_size;
132 unsigned int check_wrapped;
133 enum dvbfe_search algo_status;
136 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
137 static int dtv_get_frontend(struct dvb_frontend *fe,
138 struct dvb_frontend_parameters *p_out);
139 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
140 struct dvb_frontend_parameters *p);
142 static bool has_get_frontend(struct dvb_frontend *fe)
144 return fe->ops.get_frontend != NULL;
148 * Due to DVBv3 API calls, a delivery system should be mapped into one of
149 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
150 * otherwise, a DVBv3 call will fail.
152 enum dvbv3_emulation_type {
160 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
162 switch (delivery_system) {
163 case SYS_DVBC_ANNEX_A:
164 case SYS_DVBC_ANNEX_C:
179 case SYS_DVBC_ANNEX_B:
187 * Doesn't know how to emulate those types and/or
188 * there's no frontend driver from this type yet
189 * with some emulation code, so, we're not sure yet how
190 * to handle them, or they're not compatible with a DVBv3 call.
192 return DVBV3_UNKNOWN;
196 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
198 struct dvb_frontend_private *fepriv = fe->frontend_priv;
199 struct dvb_fe_events *events = &fepriv->events;
200 struct dvb_frontend_event *e;
203 dev_dbg(fe->dvb->device, "%s:\n", __func__);
205 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
206 dtv_get_frontend(fe, &fepriv->parameters_out);
208 mutex_lock(&events->mtx);
210 wp = (events->eventw + 1) % MAX_EVENT;
211 if (wp == events->eventr) {
212 events->overflow = 1;
213 events->eventr = (events->eventr + 1) % MAX_EVENT;
216 e = &events->events[events->eventw];
218 e->parameters = fepriv->parameters_out;
222 mutex_unlock(&events->mtx);
224 wake_up_interruptible (&events->wait_queue);
227 static int dvb_frontend_get_event(struct dvb_frontend *fe,
228 struct dvb_frontend_event *event, int flags)
230 struct dvb_frontend_private *fepriv = fe->frontend_priv;
231 struct dvb_fe_events *events = &fepriv->events;
233 dev_dbg(fe->dvb->device, "%s:\n", __func__);
235 if (events->overflow) {
236 events->overflow = 0;
240 if (events->eventw == events->eventr) {
243 if (flags & O_NONBLOCK)
248 ret = wait_event_interruptible (events->wait_queue,
249 events->eventw != events->eventr);
251 if (down_interruptible (&fepriv->sem))
258 mutex_lock(&events->mtx);
259 *event = events->events[events->eventr];
260 events->eventr = (events->eventr + 1) % MAX_EVENT;
261 mutex_unlock(&events->mtx);
266 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
268 struct dvb_frontend_private *fepriv = fe->frontend_priv;
269 struct dvb_fe_events *events = &fepriv->events;
271 mutex_lock(&events->mtx);
272 events->eventr = events->eventw;
273 mutex_unlock(&events->mtx);
276 static void dvb_frontend_init(struct dvb_frontend *fe)
278 dev_dbg(fe->dvb->device,
279 "%s: initialising adapter %i frontend %i (%s)...\n",
280 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
284 if (fe->ops.tuner_ops.init) {
285 if (fe->ops.i2c_gate_ctrl)
286 fe->ops.i2c_gate_ctrl(fe, 1);
287 fe->ops.tuner_ops.init(fe);
288 if (fe->ops.i2c_gate_ctrl)
289 fe->ops.i2c_gate_ctrl(fe, 0);
293 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
295 struct dvb_frontend_private *fepriv = fe->frontend_priv;
297 fepriv->reinitialise = 1;
298 dvb_frontend_wakeup(fe);
300 EXPORT_SYMBOL(dvb_frontend_reinitialise);
302 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
305 struct dvb_frontend *fe = fepriv->dvbdev->priv;
307 dev_dbg(fe->dvb->device, "%s:\n", __func__);
310 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
312 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
314 q2 = fepriv->quality - 128;
317 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
321 * Performs automatic twiddling of frontend parameters.
323 * @param fe The frontend concerned.
324 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
325 * @returns Number of complete iterations that have been performed.
327 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
332 struct dvb_frontend_private *fepriv = fe->frontend_priv;
333 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
334 int original_inversion = c->inversion;
335 u32 original_frequency = c->frequency;
337 /* are we using autoinversion? */
338 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
339 (c->inversion == INVERSION_AUTO));
341 /* setup parameters correctly */
343 /* calculate the lnb_drift */
344 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
346 /* wrap the auto_step if we've exceeded the maximum drift */
347 if (fepriv->lnb_drift > fepriv->max_drift) {
348 fepriv->auto_step = 0;
349 fepriv->auto_sub_step = 0;
350 fepriv->lnb_drift = 0;
353 /* perform inversion and +/- zigzag */
354 switch(fepriv->auto_sub_step) {
356 /* try with the current inversion and current drift setting */
361 if (!autoinversion) break;
363 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
368 if (fepriv->lnb_drift == 0) break;
370 fepriv->lnb_drift = -fepriv->lnb_drift;
375 if (fepriv->lnb_drift == 0) break;
376 if (!autoinversion) break;
378 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
379 fepriv->lnb_drift = -fepriv->lnb_drift;
385 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
389 if (!ready) fepriv->auto_sub_step++;
392 /* if this attempt would hit where we started, indicate a complete
393 * iteration has occurred */
394 if ((fepriv->auto_step == fepriv->started_auto_step) &&
395 (fepriv->auto_sub_step == 0) && check_wrapped) {
399 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
400 "auto_sub_step:%i started_auto_step:%i\n",
401 __func__, fepriv->lnb_drift, fepriv->inversion,
402 fepriv->auto_step, fepriv->auto_sub_step,
403 fepriv->started_auto_step);
405 /* set the frontend itself */
406 c->frequency += fepriv->lnb_drift;
408 c->inversion = fepriv->inversion;
410 if (fe->ops.set_frontend)
411 fe_set_err = fe->ops.set_frontend(fe);
413 if (fe_set_err < 0) {
414 fepriv->state = FESTATE_ERROR;
418 c->frequency = original_frequency;
419 c->inversion = original_inversion;
421 fepriv->auto_sub_step++;
425 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
429 struct dvb_frontend_private *fepriv = fe->frontend_priv;
430 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
432 /* if we've got no parameters, just keep idling */
433 if (fepriv->state & FESTATE_IDLE) {
434 fepriv->delay = 3*HZ;
439 /* in SCAN mode, we just set the frontend when asked and leave it alone */
440 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
441 if (fepriv->state & FESTATE_RETUNE) {
443 if (fe->ops.set_frontend)
444 retval = fe->ops.set_frontend(fe);
447 fepriv->state = FESTATE_ERROR;
449 fepriv->state = FESTATE_TUNED;
451 fepriv->delay = 3*HZ;
456 /* get the frontend status */
457 if (fepriv->state & FESTATE_RETUNE) {
460 if (fe->ops.read_status)
461 fe->ops.read_status(fe, &s);
462 if (s != fepriv->status) {
463 dvb_frontend_add_event(fe, s);
468 /* if we're not tuned, and we have a lock, move to the TUNED state */
469 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
470 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
471 fepriv->state = FESTATE_TUNED;
473 /* if we're tuned, then we have determined the correct inversion */
474 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
475 (c->inversion == INVERSION_AUTO)) {
476 c->inversion = fepriv->inversion;
481 /* if we are tuned already, check we're still locked */
482 if (fepriv->state & FESTATE_TUNED) {
483 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
485 /* we're tuned, and the lock is still good... */
486 if (s & FE_HAS_LOCK) {
488 } else { /* if we _WERE_ tuned, but now don't have a lock */
489 fepriv->state = FESTATE_ZIGZAG_FAST;
490 fepriv->started_auto_step = fepriv->auto_step;
491 fepriv->check_wrapped = 0;
495 /* don't actually do anything if we're in the LOSTLOCK state,
496 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
497 if ((fepriv->state & FESTATE_LOSTLOCK) &&
498 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
499 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
503 /* don't do anything if we're in the DISEQC state, since this
504 * might be someone with a motorized dish controlled by DISEQC.
505 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
506 if (fepriv->state & FESTATE_DISEQC) {
507 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
511 /* if we're in the RETUNE state, set everything up for a brand
512 * new scan, keeping the current inversion setting, as the next
513 * tune is _very_ likely to require the same */
514 if (fepriv->state & FESTATE_RETUNE) {
515 fepriv->lnb_drift = 0;
516 fepriv->auto_step = 0;
517 fepriv->auto_sub_step = 0;
518 fepriv->started_auto_step = 0;
519 fepriv->check_wrapped = 0;
523 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
524 fepriv->delay = fepriv->min_delay;
527 retval = dvb_frontend_swzigzag_autotune(fe,
528 fepriv->check_wrapped);
532 /* OK, if we've run out of trials at the fast speed.
533 * Drop back to slow for the _next_ attempt */
534 fepriv->state = FESTATE_SEARCHING_SLOW;
535 fepriv->started_auto_step = fepriv->auto_step;
538 fepriv->check_wrapped = 1;
540 /* if we've just retuned, enter the ZIGZAG_FAST state.
541 * This ensures we cannot return from an
542 * FE_SET_FRONTEND ioctl before the first frontend tune
544 if (fepriv->state & FESTATE_RETUNE) {
545 fepriv->state = FESTATE_TUNING_FAST;
550 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
551 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
553 /* Note: don't bother checking for wrapping; we stay in this
554 * state until we get a lock */
555 dvb_frontend_swzigzag_autotune(fe, 0);
559 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
561 struct dvb_frontend_private *fepriv = fe->frontend_priv;
563 if (fe->exit != DVB_FE_NO_EXIT)
566 if (fepriv->dvbdev->writers == 1)
567 if (time_after_eq(jiffies, fepriv->release_jiffies +
568 dvb_shutdown_timeout * HZ))
574 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
576 struct dvb_frontend_private *fepriv = fe->frontend_priv;
578 if (fepriv->wakeup) {
582 return dvb_frontend_is_exiting(fe);
585 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
587 struct dvb_frontend_private *fepriv = fe->frontend_priv;
590 wake_up_interruptible(&fepriv->wait_queue);
593 static int dvb_frontend_thread(void *data)
595 struct dvb_frontend *fe = data;
596 struct dvb_frontend_private *fepriv = fe->frontend_priv;
598 enum dvbfe_algo algo;
600 bool re_tune = false;
601 bool semheld = false;
603 dev_dbg(fe->dvb->device, "%s:\n", __func__);
605 fepriv->check_wrapped = 0;
607 fepriv->delay = 3*HZ;
610 fepriv->reinitialise = 0;
612 dvb_frontend_init(fe);
616 up(&fepriv->sem); /* is locked when we enter the thread... */
618 wait_event_interruptible_timeout(fepriv->wait_queue,
619 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
620 || freezing(current),
623 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
624 /* got signal or quitting */
625 if (!down_interruptible(&fepriv->sem))
627 fe->exit = DVB_FE_NORMAL_EXIT;
634 if (down_interruptible(&fepriv->sem))
637 if (fepriv->reinitialise) {
638 dvb_frontend_init(fe);
639 if (fe->ops.set_tone && fepriv->tone != -1)
640 fe->ops.set_tone(fe, fepriv->tone);
641 if (fe->ops.set_voltage && fepriv->voltage != -1)
642 fe->ops.set_voltage(fe, fepriv->voltage);
643 fepriv->reinitialise = 0;
646 /* do an iteration of the tuning loop */
647 if (fe->ops.get_frontend_algo) {
648 algo = fe->ops.get_frontend_algo(fe);
651 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
653 if (fepriv->state & FESTATE_RETUNE) {
654 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
656 fepriv->state = FESTATE_TUNED;
662 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
664 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
665 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
666 dvb_frontend_add_event(fe, s);
671 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
672 dvb_frontend_swzigzag(fe);
674 case DVBFE_ALGO_CUSTOM:
675 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
676 if (fepriv->state & FESTATE_RETUNE) {
677 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
678 fepriv->state = FESTATE_TUNED;
680 /* Case where we are going to search for a carrier
681 * User asked us to retune again for some reason, possibly
682 * requesting a search with a new set of parameters
684 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
685 if (fe->ops.search) {
686 fepriv->algo_status = fe->ops.search(fe);
687 /* We did do a search as was requested, the flags are
688 * now unset as well and has the flags wrt to search.
691 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
694 /* Track the carrier if the search was successful */
695 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
696 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
697 fepriv->delay = HZ / 2;
699 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
700 fe->ops.read_status(fe, &s);
701 if (s != fepriv->status) {
702 dvb_frontend_add_event(fe, s); /* update event list */
704 if (!(s & FE_HAS_LOCK)) {
705 fepriv->delay = HZ / 10;
706 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
708 fepriv->delay = 60 * HZ;
713 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
717 dvb_frontend_swzigzag(fe);
721 if (dvb_powerdown_on_sleep) {
722 if (fe->ops.set_voltage)
723 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
724 if (fe->ops.tuner_ops.sleep) {
725 if (fe->ops.i2c_gate_ctrl)
726 fe->ops.i2c_gate_ctrl(fe, 1);
727 fe->ops.tuner_ops.sleep(fe);
728 if (fe->ops.i2c_gate_ctrl)
729 fe->ops.i2c_gate_ctrl(fe, 0);
735 fepriv->thread = NULL;
736 if (kthread_should_stop())
737 fe->exit = DVB_FE_DEVICE_REMOVED;
739 fe->exit = DVB_FE_NO_EXIT;
744 dvb_frontend_wakeup(fe);
748 static void dvb_frontend_stop(struct dvb_frontend *fe)
750 struct dvb_frontend_private *fepriv = fe->frontend_priv;
752 dev_dbg(fe->dvb->device, "%s:\n", __func__);
754 if (fe->exit != DVB_FE_DEVICE_REMOVED)
755 fe->exit = DVB_FE_NORMAL_EXIT;
761 kthread_stop(fepriv->thread);
763 sema_init(&fepriv->sem, 1);
764 fepriv->state = FESTATE_IDLE;
766 /* paranoia check in case a signal arrived */
768 dev_warn(fe->dvb->device,
769 "dvb_frontend_stop: warning: thread %p won't exit\n",
773 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
775 return ((curtime.tv_usec < lasttime.tv_usec) ?
776 1000000 - lasttime.tv_usec + curtime.tv_usec :
777 curtime.tv_usec - lasttime.tv_usec);
779 EXPORT_SYMBOL(timeval_usec_diff);
781 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
783 curtime->tv_usec += add_usec;
784 if (curtime->tv_usec >= 1000000) {
785 curtime->tv_usec -= 1000000;
791 * Sleep until gettimeofday() > waketime + add_usec
792 * This needs to be as precise as possible, but as the delay is
793 * usually between 2ms and 32ms, it is done using a scheduled msleep
794 * followed by usleep (normally a busy-wait loop) for the remainder
796 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
798 struct timeval lasttime;
801 timeval_usec_add(waketime, add_usec);
803 do_gettimeofday(&lasttime);
804 delta = timeval_usec_diff(lasttime, *waketime);
806 msleep((delta - 1500) / 1000);
807 do_gettimeofday(&lasttime);
808 newdelta = timeval_usec_diff(lasttime, *waketime);
809 delta = (newdelta > delta) ? 0 : newdelta;
814 EXPORT_SYMBOL(dvb_frontend_sleep_until);
816 static int dvb_frontend_start(struct dvb_frontend *fe)
819 struct dvb_frontend_private *fepriv = fe->frontend_priv;
820 struct task_struct *fe_thread;
822 dev_dbg(fe->dvb->device, "%s:\n", __func__);
824 if (fepriv->thread) {
825 if (fe->exit == DVB_FE_NO_EXIT)
828 dvb_frontend_stop (fe);
831 if (signal_pending(current))
833 if (down_interruptible (&fepriv->sem))
836 fepriv->state = FESTATE_IDLE;
837 fe->exit = DVB_FE_NO_EXIT;
838 fepriv->thread = NULL;
841 fe_thread = kthread_run(dvb_frontend_thread, fe,
842 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
843 if (IS_ERR(fe_thread)) {
844 ret = PTR_ERR(fe_thread);
845 dev_warn(fe->dvb->device,
846 "dvb_frontend_start: failed to start kthread (%d)\n",
851 fepriv->thread = fe_thread;
855 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
856 u32 *freq_min, u32 *freq_max)
858 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
860 if (fe->ops.info.frequency_max == 0)
861 *freq_max = fe->ops.tuner_ops.info.frequency_max;
862 else if (fe->ops.tuner_ops.info.frequency_max == 0)
863 *freq_max = fe->ops.info.frequency_max;
865 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
867 if (*freq_min == 0 || *freq_max == 0)
868 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
869 fe->dvb->num, fe->id);
872 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
874 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
878 /* range check: frequency */
879 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
880 if ((freq_min && c->frequency < freq_min) ||
881 (freq_max && c->frequency > freq_max)) {
882 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
883 fe->dvb->num, fe->id, c->frequency,
888 /* range check: symbol rate */
889 switch (c->delivery_system) {
893 case SYS_DVBC_ANNEX_A:
894 case SYS_DVBC_ANNEX_C:
895 if ((fe->ops.info.symbol_rate_min &&
896 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
897 (fe->ops.info.symbol_rate_max &&
898 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
899 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
900 fe->dvb->num, fe->id, c->symbol_rate,
901 fe->ops.info.symbol_rate_min,
902 fe->ops.info.symbol_rate_max);
912 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
914 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
918 delsys = c->delivery_system;
919 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
920 c->delivery_system = delsys;
922 c->state = DTV_CLEAR;
924 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
925 __func__, c->delivery_system);
927 c->transmission_mode = TRANSMISSION_MODE_AUTO;
928 c->bandwidth_hz = 0; /* AUTO */
929 c->guard_interval = GUARD_INTERVAL_AUTO;
930 c->hierarchy = HIERARCHY_AUTO;
932 c->code_rate_HP = FEC_AUTO;
933 c->code_rate_LP = FEC_AUTO;
934 c->fec_inner = FEC_AUTO;
935 c->rolloff = ROLLOFF_AUTO;
936 c->voltage = SEC_VOLTAGE_OFF;
937 c->sectone = SEC_TONE_OFF;
938 c->pilot = PILOT_AUTO;
940 c->isdbt_partial_reception = 0;
941 c->isdbt_sb_mode = 0;
942 c->isdbt_sb_subchannel = 0;
943 c->isdbt_sb_segment_idx = 0;
944 c->isdbt_sb_segment_count = 0;
945 c->isdbt_layer_enabled = 0;
946 for (i = 0; i < 3; i++) {
947 c->layer[i].fec = FEC_AUTO;
948 c->layer[i].modulation = QAM_AUTO;
949 c->layer[i].interleaving = 0;
950 c->layer[i].segment_count = 0;
953 c->stream_id = NO_STREAM_ID_FILTER;
955 switch (c->delivery_system) {
959 c->modulation = QPSK; /* implied for DVB-S in legacy API */
960 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
963 c->modulation = VSB_8;
966 c->symbol_rate = 28860000;
967 c->rolloff = ROLLOFF_35;
968 c->bandwidth_hz = c->symbol_rate / 100 * 135;
971 c->modulation = QAM_AUTO;
980 #define _DTV_CMD(n, s, b) \
988 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
989 _DTV_CMD(DTV_TUNE, 1, 0),
990 _DTV_CMD(DTV_CLEAR, 1, 0),
993 _DTV_CMD(DTV_FREQUENCY, 1, 0),
994 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
995 _DTV_CMD(DTV_MODULATION, 1, 0),
996 _DTV_CMD(DTV_INVERSION, 1, 0),
997 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
998 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
999 _DTV_CMD(DTV_INNER_FEC, 1, 0),
1000 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1001 _DTV_CMD(DTV_TONE, 1, 0),
1002 _DTV_CMD(DTV_PILOT, 1, 0),
1003 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1004 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1005 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1006 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1007 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1008 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1009 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1010 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1012 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1013 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1014 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1015 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1016 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1017 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1018 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1019 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1020 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1021 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1022 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1023 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1024 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1025 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1026 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1027 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1028 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1029 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1031 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1032 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1033 _DTV_CMD(DTV_LNA, 1, 0),
1036 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1037 _DTV_CMD(DTV_API_VERSION, 0, 0),
1039 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1041 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1042 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1044 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1045 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1046 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1047 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1048 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1049 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1050 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1051 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1052 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1053 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1054 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1055 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1056 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1058 /* Statistics API */
1059 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1060 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1061 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1062 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1063 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1064 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1065 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1066 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1069 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1073 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1074 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1075 __func__, tvp->cmd);
1079 dev_dbg(fe->dvb->device, "%s: tvp.cmd = 0x%08x (%s)\n", __func__,
1080 tvp->cmd, dtv_cmds[tvp->cmd].name);
1082 if (dtv_cmds[tvp->cmd].buffer) {
1083 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1084 __func__, tvp->u.buffer.len);
1086 for(i = 0; i < tvp->u.buffer.len; i++)
1087 dev_dbg(fe->dvb->device,
1088 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1089 __func__, i, tvp->u.buffer.data[i]);
1091 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1096 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1097 * drivers can use a single set_frontend tuning function, regardless of whether
1098 * it's being used for the legacy or new API, reducing code and complexity.
1100 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1101 struct dtv_frontend_properties *c,
1102 const struct dvb_frontend_parameters *p)
1104 c->frequency = p->frequency;
1105 c->inversion = p->inversion;
1107 switch (dvbv3_type(c->delivery_system)) {
1109 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1110 c->symbol_rate = p->u.qpsk.symbol_rate;
1111 c->fec_inner = p->u.qpsk.fec_inner;
1114 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1115 c->symbol_rate = p->u.qam.symbol_rate;
1116 c->fec_inner = p->u.qam.fec_inner;
1117 c->modulation = p->u.qam.modulation;
1120 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1122 switch (p->u.ofdm.bandwidth) {
1123 case BANDWIDTH_10_MHZ:
1124 c->bandwidth_hz = 10000000;
1126 case BANDWIDTH_8_MHZ:
1127 c->bandwidth_hz = 8000000;
1129 case BANDWIDTH_7_MHZ:
1130 c->bandwidth_hz = 7000000;
1132 case BANDWIDTH_6_MHZ:
1133 c->bandwidth_hz = 6000000;
1135 case BANDWIDTH_5_MHZ:
1136 c->bandwidth_hz = 5000000;
1138 case BANDWIDTH_1_712_MHZ:
1139 c->bandwidth_hz = 1712000;
1141 case BANDWIDTH_AUTO:
1142 c->bandwidth_hz = 0;
1145 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1146 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1147 c->modulation = p->u.ofdm.constellation;
1148 c->transmission_mode = p->u.ofdm.transmission_mode;
1149 c->guard_interval = p->u.ofdm.guard_interval;
1150 c->hierarchy = p->u.ofdm.hierarchy_information;
1153 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1154 c->modulation = p->u.vsb.modulation;
1155 if (c->delivery_system == SYS_ATSCMH)
1157 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1158 c->delivery_system = SYS_ATSC;
1160 c->delivery_system = SYS_DVBC_ANNEX_B;
1163 dev_err(fe->dvb->device,
1164 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1165 __func__, c->delivery_system);
1172 /* Ensure the cached values are set correctly in the frontend
1173 * legacy tuning structures, for the advanced tuning API.
1175 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1176 struct dvb_frontend_parameters *p)
1178 const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1180 p->frequency = c->frequency;
1181 p->inversion = c->inversion;
1183 switch (dvbv3_type(c->delivery_system)) {
1185 dev_err(fe->dvb->device,
1186 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1187 __func__, c->delivery_system);
1190 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1191 p->u.qpsk.symbol_rate = c->symbol_rate;
1192 p->u.qpsk.fec_inner = c->fec_inner;
1195 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1196 p->u.qam.symbol_rate = c->symbol_rate;
1197 p->u.qam.fec_inner = c->fec_inner;
1198 p->u.qam.modulation = c->modulation;
1201 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1202 switch (c->bandwidth_hz) {
1204 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1207 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1210 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1213 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1216 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1219 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1223 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1225 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1226 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1227 p->u.ofdm.constellation = c->modulation;
1228 p->u.ofdm.transmission_mode = c->transmission_mode;
1229 p->u.ofdm.guard_interval = c->guard_interval;
1230 p->u.ofdm.hierarchy_information = c->hierarchy;
1233 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1234 p->u.vsb.modulation = c->modulation;
1241 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1242 * @fe: struct dvb_frontend pointer
1243 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1244 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1246 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1247 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1248 * If p_out is not null, it will update the DVBv3 params pointed by it.
1250 static int dtv_get_frontend(struct dvb_frontend *fe,
1251 struct dvb_frontend_parameters *p_out)
1255 if (fe->ops.get_frontend) {
1256 r = fe->ops.get_frontend(fe);
1257 if (unlikely(r < 0))
1260 dtv_property_legacy_params_sync(fe, p_out);
1264 /* As everything is in cache, get_frontend fops are always supported */
1268 static int dvb_frontend_ioctl_legacy(struct file *file,
1269 unsigned int cmd, void *parg);
1270 static int dvb_frontend_ioctl_properties(struct file *file,
1271 unsigned int cmd, void *parg);
1273 static int dtv_property_process_get(struct dvb_frontend *fe,
1274 const struct dtv_frontend_properties *c,
1275 struct dtv_property *tvp,
1281 case DTV_ENUM_DELSYS:
1283 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1284 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1287 tvp->u.buffer.len = ncaps;
1290 tvp->u.data = c->frequency;
1292 case DTV_MODULATION:
1293 tvp->u.data = c->modulation;
1295 case DTV_BANDWIDTH_HZ:
1296 tvp->u.data = c->bandwidth_hz;
1299 tvp->u.data = c->inversion;
1301 case DTV_SYMBOL_RATE:
1302 tvp->u.data = c->symbol_rate;
1305 tvp->u.data = c->fec_inner;
1308 tvp->u.data = c->pilot;
1311 tvp->u.data = c->rolloff;
1313 case DTV_DELIVERY_SYSTEM:
1314 tvp->u.data = c->delivery_system;
1317 tvp->u.data = c->voltage;
1320 tvp->u.data = c->sectone;
1322 case DTV_API_VERSION:
1323 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1325 case DTV_CODE_RATE_HP:
1326 tvp->u.data = c->code_rate_HP;
1328 case DTV_CODE_RATE_LP:
1329 tvp->u.data = c->code_rate_LP;
1331 case DTV_GUARD_INTERVAL:
1332 tvp->u.data = c->guard_interval;
1334 case DTV_TRANSMISSION_MODE:
1335 tvp->u.data = c->transmission_mode;
1338 tvp->u.data = c->hierarchy;
1340 case DTV_INTERLEAVING:
1341 tvp->u.data = c->interleaving;
1344 /* ISDB-T Support here */
1345 case DTV_ISDBT_PARTIAL_RECEPTION:
1346 tvp->u.data = c->isdbt_partial_reception;
1348 case DTV_ISDBT_SOUND_BROADCASTING:
1349 tvp->u.data = c->isdbt_sb_mode;
1351 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1352 tvp->u.data = c->isdbt_sb_subchannel;
1354 case DTV_ISDBT_SB_SEGMENT_IDX:
1355 tvp->u.data = c->isdbt_sb_segment_idx;
1357 case DTV_ISDBT_SB_SEGMENT_COUNT:
1358 tvp->u.data = c->isdbt_sb_segment_count;
1360 case DTV_ISDBT_LAYER_ENABLED:
1361 tvp->u.data = c->isdbt_layer_enabled;
1363 case DTV_ISDBT_LAYERA_FEC:
1364 tvp->u.data = c->layer[0].fec;
1366 case DTV_ISDBT_LAYERA_MODULATION:
1367 tvp->u.data = c->layer[0].modulation;
1369 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1370 tvp->u.data = c->layer[0].segment_count;
1372 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1373 tvp->u.data = c->layer[0].interleaving;
1375 case DTV_ISDBT_LAYERB_FEC:
1376 tvp->u.data = c->layer[1].fec;
1378 case DTV_ISDBT_LAYERB_MODULATION:
1379 tvp->u.data = c->layer[1].modulation;
1381 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1382 tvp->u.data = c->layer[1].segment_count;
1384 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1385 tvp->u.data = c->layer[1].interleaving;
1387 case DTV_ISDBT_LAYERC_FEC:
1388 tvp->u.data = c->layer[2].fec;
1390 case DTV_ISDBT_LAYERC_MODULATION:
1391 tvp->u.data = c->layer[2].modulation;
1393 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1394 tvp->u.data = c->layer[2].segment_count;
1396 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1397 tvp->u.data = c->layer[2].interleaving;
1400 /* Multistream support */
1402 case DTV_DVBT2_PLP_ID_LEGACY:
1403 tvp->u.data = c->stream_id;
1407 case DTV_ATSCMH_FIC_VER:
1408 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1410 case DTV_ATSCMH_PARADE_ID:
1411 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1413 case DTV_ATSCMH_NOG:
1414 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1416 case DTV_ATSCMH_TNOG:
1417 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1419 case DTV_ATSCMH_SGN:
1420 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1422 case DTV_ATSCMH_PRC:
1423 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1425 case DTV_ATSCMH_RS_FRAME_MODE:
1426 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1428 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1429 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1431 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1432 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1434 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1435 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1437 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1438 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1440 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1441 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1443 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1444 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1446 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1447 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1449 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1450 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1454 tvp->u.data = c->lna;
1457 /* Fill quality measures */
1458 case DTV_STAT_SIGNAL_STRENGTH:
1459 tvp->u.st = c->strength;
1464 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1465 tvp->u.st = c->pre_bit_error;
1467 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1468 tvp->u.st = c->pre_bit_count;
1470 case DTV_STAT_POST_ERROR_BIT_COUNT:
1471 tvp->u.st = c->post_bit_error;
1473 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1474 tvp->u.st = c->post_bit_count;
1476 case DTV_STAT_ERROR_BLOCK_COUNT:
1477 tvp->u.st = c->block_error;
1479 case DTV_STAT_TOTAL_BLOCK_COUNT:
1480 tvp->u.st = c->block_count;
1483 dev_dbg(fe->dvb->device,
1484 "%s: FE property %d doesn't exist\n",
1485 __func__, tvp->cmd);
1489 /* Allow the frontend to override outgoing properties */
1490 if (fe->ops.get_property) {
1491 r = fe->ops.get_property(fe, tvp);
1496 dtv_property_dump(fe, tvp);
1501 static int dtv_set_frontend(struct dvb_frontend *fe);
1503 static bool is_dvbv3_delsys(u32 delsys)
1507 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1508 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1514 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1515 * @fe: struct frontend;
1516 * @delsys: DVBv5 type that will be used for emulation
1518 * Provides emulation for delivery systems that are compatible with the old
1519 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1520 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1521 * parameters are compatible with DVB-S spec.
1523 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1526 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1528 c->delivery_system = delsys;
1531 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1533 if (c->delivery_system == SYS_ISDBT) {
1534 dev_dbg(fe->dvb->device,
1535 "%s: Using defaults for SYS_ISDBT\n",
1538 if (!c->bandwidth_hz)
1539 c->bandwidth_hz = 6000000;
1541 c->isdbt_partial_reception = 0;
1542 c->isdbt_sb_mode = 0;
1543 c->isdbt_sb_subchannel = 0;
1544 c->isdbt_sb_segment_idx = 0;
1545 c->isdbt_sb_segment_count = 0;
1546 c->isdbt_layer_enabled = 7;
1547 for (i = 0; i < 3; i++) {
1548 c->layer[i].fec = FEC_AUTO;
1549 c->layer[i].modulation = QAM_AUTO;
1550 c->layer[i].interleaving = 0;
1551 c->layer[i].segment_count = 0;
1554 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1555 __func__, c->delivery_system);
1561 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1562 * @fe: frontend struct
1563 * @desired_system: delivery system requested by the user
1565 * A DVBv5 call know what's the desired system it wants. So, set it.
1567 * There are, however, a few known issues with early DVBv5 applications that
1568 * are also handled by this logic:
1570 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1571 * This is an API violation, but, as we don't want to break userspace,
1572 * convert it to the first supported delivery system.
1573 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1574 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1575 * ISDB-T provided backward compat with DVB-T.
1577 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1581 u32 delsys = SYS_UNDEFINED;
1582 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1583 enum dvbv3_emulation_type type;
1586 * It was reported that some old DVBv5 applications were
1587 * filling delivery_system with SYS_UNDEFINED. If this happens,
1588 * assume that the application wants to use the first supported
1591 if (desired_system == SYS_UNDEFINED)
1592 desired_system = fe->ops.delsys[0];
1595 * This is a DVBv5 call. So, it likely knows the supported
1596 * delivery systems. So, check if the desired delivery system is
1600 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1601 if (fe->ops.delsys[ncaps] == desired_system) {
1602 c->delivery_system = desired_system;
1603 dev_dbg(fe->dvb->device,
1604 "%s: Changing delivery system to %d\n",
1605 __func__, desired_system);
1612 * The requested delivery system isn't supported. Maybe userspace
1613 * is requesting a DVBv3 compatible delivery system.
1615 * The emulation only works if the desired system is one of the
1616 * delivery systems supported by DVBv3 API
1618 if (!is_dvbv3_delsys(desired_system)) {
1619 dev_dbg(fe->dvb->device,
1620 "%s: Delivery system %d not supported.\n",
1621 __func__, desired_system);
1625 type = dvbv3_type(desired_system);
1628 * Get the last non-DVBv3 delivery system that has the same type
1629 * of the desired system
1632 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1633 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1634 delsys = fe->ops.delsys[ncaps];
1638 /* There's nothing compatible with the desired delivery system */
1639 if (delsys == SYS_UNDEFINED) {
1640 dev_dbg(fe->dvb->device,
1641 "%s: Delivery system %d not supported on emulation mode.\n",
1642 __func__, desired_system);
1646 dev_dbg(fe->dvb->device,
1647 "%s: Using delivery system %d emulated as if it were %d\n",
1648 __func__, delsys, desired_system);
1650 return emulate_delivery_system(fe, desired_system);
1654 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1655 * @fe: frontend struct
1657 * A DVBv3 call doesn't know what's the desired system it wants. It also
1658 * doesn't allow to switch between different types. Due to that, userspace
1659 * should use DVBv5 instead.
1660 * However, in order to avoid breaking userspace API, limited backward
1661 * compatibility support is provided.
1663 * There are some delivery systems that are incompatible with DVBv3 calls.
1665 * This routine should work fine for frontends that support just one delivery
1668 * For frontends that support multiple frontends:
1669 * 1) It defaults to use the first supported delivery system. There's an
1670 * userspace application that allows changing it at runtime;
1672 * 2) If the current delivery system is not compatible with DVBv3, it gets
1673 * the first one that it is compatible.
1675 * NOTE: in order for this to work with applications like Kaffeine that
1676 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1677 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1678 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1681 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1684 u32 delsys = SYS_UNDEFINED;
1685 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1687 /* If not set yet, defaults to the first supported delivery system */
1688 if (c->delivery_system == SYS_UNDEFINED)
1689 c->delivery_system = fe->ops.delsys[0];
1692 * Trivial case: just use the current one, if it already a DVBv3
1695 if (is_dvbv3_delsys(c->delivery_system)) {
1696 dev_dbg(fe->dvb->device,
1697 "%s: Using delivery system to %d\n",
1698 __func__, c->delivery_system);
1703 * Seek for the first delivery system that it is compatible with a
1707 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1708 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1709 delsys = fe->ops.delsys[ncaps];
1714 if (delsys == SYS_UNDEFINED) {
1715 dev_dbg(fe->dvb->device,
1716 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1720 return emulate_delivery_system(fe, delsys);
1723 static int dtv_property_process_set(struct dvb_frontend *fe,
1724 struct dtv_property *tvp,
1728 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1730 /* Allow the frontend to validate incoming properties */
1731 if (fe->ops.set_property) {
1732 r = fe->ops.set_property(fe, tvp);
1740 * Reset a cache of data specific to the frontend here. This does
1741 * not effect hardware.
1743 dvb_frontend_clear_cache(fe);
1746 /* interpret the cache of data, build either a traditional frontend
1747 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1750 c->state = tvp->cmd;
1751 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1754 r = dtv_set_frontend(fe);
1757 c->frequency = tvp->u.data;
1759 case DTV_MODULATION:
1760 c->modulation = tvp->u.data;
1762 case DTV_BANDWIDTH_HZ:
1763 c->bandwidth_hz = tvp->u.data;
1766 c->inversion = tvp->u.data;
1768 case DTV_SYMBOL_RATE:
1769 c->symbol_rate = tvp->u.data;
1772 c->fec_inner = tvp->u.data;
1775 c->pilot = tvp->u.data;
1778 c->rolloff = tvp->u.data;
1780 case DTV_DELIVERY_SYSTEM:
1781 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1784 c->voltage = tvp->u.data;
1785 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1786 (void *)c->voltage);
1789 c->sectone = tvp->u.data;
1790 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1791 (void *)c->sectone);
1793 case DTV_CODE_RATE_HP:
1794 c->code_rate_HP = tvp->u.data;
1796 case DTV_CODE_RATE_LP:
1797 c->code_rate_LP = tvp->u.data;
1799 case DTV_GUARD_INTERVAL:
1800 c->guard_interval = tvp->u.data;
1802 case DTV_TRANSMISSION_MODE:
1803 c->transmission_mode = tvp->u.data;
1806 c->hierarchy = tvp->u.data;
1808 case DTV_INTERLEAVING:
1809 c->interleaving = tvp->u.data;
1812 /* ISDB-T Support here */
1813 case DTV_ISDBT_PARTIAL_RECEPTION:
1814 c->isdbt_partial_reception = tvp->u.data;
1816 case DTV_ISDBT_SOUND_BROADCASTING:
1817 c->isdbt_sb_mode = tvp->u.data;
1819 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1820 c->isdbt_sb_subchannel = tvp->u.data;
1822 case DTV_ISDBT_SB_SEGMENT_IDX:
1823 c->isdbt_sb_segment_idx = tvp->u.data;
1825 case DTV_ISDBT_SB_SEGMENT_COUNT:
1826 c->isdbt_sb_segment_count = tvp->u.data;
1828 case DTV_ISDBT_LAYER_ENABLED:
1829 c->isdbt_layer_enabled = tvp->u.data;
1831 case DTV_ISDBT_LAYERA_FEC:
1832 c->layer[0].fec = tvp->u.data;
1834 case DTV_ISDBT_LAYERA_MODULATION:
1835 c->layer[0].modulation = tvp->u.data;
1837 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1838 c->layer[0].segment_count = tvp->u.data;
1840 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1841 c->layer[0].interleaving = tvp->u.data;
1843 case DTV_ISDBT_LAYERB_FEC:
1844 c->layer[1].fec = tvp->u.data;
1846 case DTV_ISDBT_LAYERB_MODULATION:
1847 c->layer[1].modulation = tvp->u.data;
1849 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1850 c->layer[1].segment_count = tvp->u.data;
1852 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1853 c->layer[1].interleaving = tvp->u.data;
1855 case DTV_ISDBT_LAYERC_FEC:
1856 c->layer[2].fec = tvp->u.data;
1858 case DTV_ISDBT_LAYERC_MODULATION:
1859 c->layer[2].modulation = tvp->u.data;
1861 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1862 c->layer[2].segment_count = tvp->u.data;
1864 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1865 c->layer[2].interleaving = tvp->u.data;
1868 /* Multistream support */
1870 case DTV_DVBT2_PLP_ID_LEGACY:
1871 c->stream_id = tvp->u.data;
1875 case DTV_ATSCMH_PARADE_ID:
1876 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1878 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1879 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1883 c->lna = tvp->u.data;
1884 if (fe->ops.set_lna)
1885 r = fe->ops.set_lna(fe);
1897 static int dvb_frontend_ioctl(struct file *file,
1898 unsigned int cmd, void *parg)
1900 struct dvb_device *dvbdev = file->private_data;
1901 struct dvb_frontend *fe = dvbdev->priv;
1902 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1903 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1904 int err = -EOPNOTSUPP;
1906 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1907 if (down_interruptible(&fepriv->sem))
1908 return -ERESTARTSYS;
1910 if (fe->exit != DVB_FE_NO_EXIT) {
1915 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1916 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1917 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1922 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1923 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1925 c->state = DTV_UNDEFINED;
1926 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1933 static int dvb_frontend_ioctl_properties(struct file *file,
1934 unsigned int cmd, void *parg)
1936 struct dvb_device *dvbdev = file->private_data;
1937 struct dvb_frontend *fe = dvbdev->priv;
1938 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1939 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1942 struct dtv_properties *tvps = parg;
1943 struct dtv_property *tvp = NULL;
1946 dev_dbg(fe->dvb->device, "%s:\n", __func__);
1948 if (cmd == FE_SET_PROPERTY) {
1949 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1950 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1952 /* Put an arbitrary limit on the number of messages that can
1953 * be sent at once */
1954 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1957 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1963 if (copy_from_user(tvp, (void __user *)tvps->props,
1964 tvps->num * sizeof(struct dtv_property))) {
1969 for (i = 0; i < tvps->num; i++) {
1970 err = dtv_property_process_set(fe, tvp + i, file);
1973 (tvp + i)->result = err;
1976 if (c->state == DTV_TUNE)
1977 dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1979 } else if (cmd == FE_GET_PROPERTY) {
1980 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1981 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1983 /* Put an arbitrary limit on the number of messages that can
1984 * be sent at once */
1985 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1988 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1994 if (copy_from_user(tvp, (void __user *)tvps->props,
1995 tvps->num * sizeof(struct dtv_property))) {
2001 * Fills the cache out struct with the cache contents, plus
2002 * the data retrieved from get_frontend, if the frontend
2003 * is not idle. Otherwise, returns the cached content
2005 if (fepriv->state != FESTATE_IDLE) {
2006 err = dtv_get_frontend(fe, NULL);
2010 for (i = 0; i < tvps->num; i++) {
2011 err = dtv_property_process_get(fe, c, tvp + i, file);
2014 (tvp + i)->result = err;
2017 if (copy_to_user((void __user *)tvps->props, tvp,
2018 tvps->num * sizeof(struct dtv_property))) {
2031 static int dtv_set_frontend(struct dvb_frontend *fe)
2033 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2034 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2035 struct dvb_frontend_tune_settings fetunesettings;
2038 if (dvb_frontend_check_parameters(fe) < 0)
2042 * Initialize output parameters to match the values given by
2043 * the user. FE_SET_FRONTEND triggers an initial frontend event
2044 * with status = 0, which copies output parameters to userspace.
2046 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2049 * Be sure that the bandwidth will be filled for all
2050 * non-satellite systems, as tuners need to know what
2051 * low pass/Nyquist half filter should be applied, in
2052 * order to avoid inter-channel noise.
2054 * ISDB-T and DVB-T/T2 already sets bandwidth.
2055 * ATSC and DVB-C don't set, so, the core should fill it.
2057 * On DVB-C Annex A and C, the bandwidth is a function of
2058 * the roll-off and symbol rate. Annex B defines different
2059 * roll-off factors depending on the modulation. Fortunately,
2060 * Annex B is only used with 6MHz, so there's no need to
2063 * While not officially supported, a side effect of handling it at
2064 * the cache level is that a program could retrieve the bandwidth
2065 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2067 switch (c->delivery_system) {
2069 case SYS_DVBC_ANNEX_B:
2070 c->bandwidth_hz = 6000000;
2072 case SYS_DVBC_ANNEX_A:
2075 case SYS_DVBC_ANNEX_C:
2084 switch (c->rolloff) {
2100 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
2102 /* force auto frequency inversion if requested */
2103 if (dvb_force_auto_inversion)
2104 c->inversion = INVERSION_AUTO;
2107 * without hierarchical coding code_rate_LP is irrelevant,
2108 * so we tolerate the otherwise invalid FEC_NONE setting
2110 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2111 c->code_rate_LP = FEC_AUTO;
2113 /* get frontend-specific tuning settings */
2114 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2115 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2116 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2117 fepriv->max_drift = fetunesettings.max_drift;
2118 fepriv->step_size = fetunesettings.step_size;
2120 /* default values */
2121 switch (c->delivery_system) {
2126 case SYS_DVBC_ANNEX_A:
2127 case SYS_DVBC_ANNEX_C:
2128 fepriv->min_delay = HZ / 20;
2129 fepriv->step_size = c->symbol_rate / 16000;
2130 fepriv->max_drift = c->symbol_rate / 2000;
2136 fepriv->min_delay = HZ / 20;
2137 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2138 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2142 * FIXME: This sounds wrong! if freqency_stepsize is
2143 * defined by the frontend, why not use it???
2145 fepriv->min_delay = HZ / 20;
2146 fepriv->step_size = 0; /* no zigzag */
2147 fepriv->max_drift = 0;
2151 if (dvb_override_tune_delay > 0)
2152 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2154 fepriv->state = FESTATE_RETUNE;
2156 /* Request the search algorithm to search */
2157 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2159 dvb_frontend_clear_events(fe);
2160 dvb_frontend_add_event(fe, 0);
2161 dvb_frontend_wakeup(fe);
2168 static int dvb_frontend_ioctl_legacy(struct file *file,
2169 unsigned int cmd, void *parg)
2171 struct dvb_device *dvbdev = file->private_data;
2172 struct dvb_frontend *fe = dvbdev->priv;
2173 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2174 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2175 int err = -EOPNOTSUPP;
2179 struct dvb_frontend_info* info = parg;
2181 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2182 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2185 * Associate the 4 delivery systems supported by DVBv3
2186 * API with their DVBv5 counterpart. For the other standards,
2187 * use the closest type, assuming that it would hopefully
2188 * work with a DVBv3 application.
2189 * It should be noticed that, on multi-frontend devices with
2190 * different types (terrestrial and cable, for example),
2191 * a pure DVBv3 application won't be able to use all delivery
2192 * systems. Yet, changing the DVBv5 cache to the other delivery
2193 * system should be enough for making it work.
2195 switch (dvbv3_type(c->delivery_system)) {
2197 info->type = FE_QPSK;
2200 info->type = FE_ATSC;
2203 info->type = FE_QAM;
2206 info->type = FE_OFDM;
2209 dev_err(fe->dvb->device,
2210 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2211 __func__, c->delivery_system);
2212 fe->ops.info.type = FE_OFDM;
2214 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2215 __func__, c->delivery_system, fe->ops.info.type);
2217 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2218 * do it, it is done for it. */
2219 info->caps |= FE_CAN_INVERSION_AUTO;
2224 case FE_READ_STATUS: {
2225 fe_status_t* status = parg;
2227 /* if retune was requested but hasn't occurred yet, prevent
2228 * that user get signal state from previous tuning */
2229 if (fepriv->state == FESTATE_RETUNE ||
2230 fepriv->state == FESTATE_ERROR) {
2236 if (fe->ops.read_status)
2237 err = fe->ops.read_status(fe, status);
2242 if (fe->ops.read_ber) {
2244 err = fe->ops.read_ber(fe, (__u32 *) parg);
2250 case FE_READ_SIGNAL_STRENGTH:
2251 if (fe->ops.read_signal_strength) {
2253 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2260 if (fe->ops.read_snr) {
2262 err = fe->ops.read_snr(fe, (__u16 *) parg);
2268 case FE_READ_UNCORRECTED_BLOCKS:
2269 if (fe->ops.read_ucblocks) {
2271 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2277 case FE_DISEQC_RESET_OVERLOAD:
2278 if (fe->ops.diseqc_reset_overload) {
2279 err = fe->ops.diseqc_reset_overload(fe);
2280 fepriv->state = FESTATE_DISEQC;
2285 case FE_DISEQC_SEND_MASTER_CMD:
2286 if (fe->ops.diseqc_send_master_cmd) {
2287 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2288 fepriv->state = FESTATE_DISEQC;
2293 case FE_DISEQC_SEND_BURST:
2294 if (fe->ops.diseqc_send_burst) {
2295 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2296 fepriv->state = FESTATE_DISEQC;
2302 if (fe->ops.set_tone) {
2303 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2304 fepriv->tone = (fe_sec_tone_mode_t) parg;
2305 fepriv->state = FESTATE_DISEQC;
2310 case FE_SET_VOLTAGE:
2311 if (fe->ops.set_voltage) {
2312 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2313 fepriv->voltage = (fe_sec_voltage_t) parg;
2314 fepriv->state = FESTATE_DISEQC;
2319 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2320 if (fe->ops.dishnetwork_send_legacy_command) {
2321 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2322 fepriv->state = FESTATE_DISEQC;
2324 } else if (fe->ops.set_voltage) {
2326 * NOTE: This is a fallback condition. Some frontends
2327 * (stv0299 for instance) take longer than 8msec to
2328 * respond to a set_voltage command. Those switches
2329 * need custom routines to switch properly. For all
2330 * other frontends, the following should work ok.
2331 * Dish network legacy switches (as used by Dish500)
2332 * are controlled by sending 9-bit command words
2333 * spaced 8msec apart.
2334 * the actual command word is switch/port dependent
2335 * so it is up to the userspace application to send
2336 * the right command.
2337 * The command must always start with a '0' after
2338 * initialization, so parg is 8 bits and does not
2339 * include the initialization or start bit
2341 unsigned long swcmd = ((unsigned long) parg) << 1;
2342 struct timeval nexttime;
2343 struct timeval tv[10];
2346 if (dvb_frontend_debug)
2347 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2348 do_gettimeofday(&nexttime);
2349 if (dvb_frontend_debug)
2351 /* before sending a command, initialize by sending
2352 * a 32ms 18V to the switch
2354 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2355 dvb_frontend_sleep_until(&nexttime, 32000);
2357 for (i = 0; i < 9; i++) {
2358 if (dvb_frontend_debug)
2359 do_gettimeofday(&tv[i + 1]);
2360 if ((swcmd & 0x01) != last) {
2361 /* set voltage to (last ? 13V : 18V) */
2362 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2363 last = (last) ? 0 : 1;
2367 dvb_frontend_sleep_until(&nexttime, 8000);
2369 if (dvb_frontend_debug) {
2370 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2371 __func__, fe->dvb->num);
2372 for (i = 1; i < 10; i++)
2373 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2376 fepriv->state = FESTATE_DISEQC;
2381 case FE_DISEQC_RECV_SLAVE_REPLY:
2382 if (fe->ops.diseqc_recv_slave_reply)
2383 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2386 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2387 if (fe->ops.enable_high_lnb_voltage)
2388 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2391 case FE_SET_FRONTEND:
2392 err = dvbv3_set_delivery_system(fe);
2396 err = dtv_property_cache_sync(fe, c, parg);
2399 err = dtv_set_frontend(fe);
2402 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2405 case FE_GET_FRONTEND:
2406 err = dtv_get_frontend(fe, parg);
2409 case FE_SET_FRONTEND_TUNE_MODE:
2410 fepriv->tune_mode_flags = (unsigned long) parg;
2419 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2421 struct dvb_device *dvbdev = file->private_data;
2422 struct dvb_frontend *fe = dvbdev->priv;
2423 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2425 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2427 poll_wait (file, &fepriv->events.wait_queue, wait);
2429 if (fepriv->events.eventw != fepriv->events.eventr)
2430 return (POLLIN | POLLRDNORM | POLLPRI);
2435 static int dvb_frontend_open(struct inode *inode, struct file *file)
2437 struct dvb_device *dvbdev = file->private_data;
2438 struct dvb_frontend *fe = dvbdev->priv;
2439 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2440 struct dvb_adapter *adapter = fe->dvb;
2443 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2444 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2447 if (adapter->mfe_shared) {
2448 mutex_lock (&adapter->mfe_lock);
2450 if (adapter->mfe_dvbdev == NULL)
2451 adapter->mfe_dvbdev = dvbdev;
2453 else if (adapter->mfe_dvbdev != dvbdev) {
2455 *mfedev = adapter->mfe_dvbdev;
2457 *mfe = mfedev->priv;
2458 struct dvb_frontend_private
2459 *mfepriv = mfe->frontend_priv;
2460 int mferetry = (dvb_mfe_wait_time << 1);
2462 mutex_unlock (&adapter->mfe_lock);
2463 while (mferetry-- && (mfedev->users != -1 ||
2464 mfepriv->thread != NULL)) {
2465 if(msleep_interruptible(500)) {
2466 if(signal_pending(current))
2471 mutex_lock (&adapter->mfe_lock);
2472 if(adapter->mfe_dvbdev != dvbdev) {
2473 mfedev = adapter->mfe_dvbdev;
2475 mfepriv = mfe->frontend_priv;
2476 if (mfedev->users != -1 ||
2477 mfepriv->thread != NULL) {
2478 mutex_unlock (&adapter->mfe_lock);
2481 adapter->mfe_dvbdev = dvbdev;
2486 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2487 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2490 /* If we took control of the bus, we need to force
2491 reinitialization. This is because many ts_bus_ctrl()
2492 functions strobe the RESET pin on the demod, and if the
2493 frontend thread already exists then the dvb_init() routine
2494 won't get called (which is what usually does initial
2495 register configuration). */
2496 fepriv->reinitialise = 1;
2499 if ((ret = dvb_generic_open (inode, file)) < 0)
2502 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2503 /* normal tune mode when opened R/W */
2504 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2506 fepriv->voltage = -1;
2508 ret = dvb_frontend_start (fe);
2512 /* empty event queue */
2513 fepriv->events.eventr = fepriv->events.eventw = 0;
2516 if (adapter->mfe_shared)
2517 mutex_unlock (&adapter->mfe_lock);
2521 dvb_generic_release(inode, file);
2523 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2524 fe->ops.ts_bus_ctrl(fe, 0);
2526 if (adapter->mfe_shared)
2527 mutex_unlock (&adapter->mfe_lock);
2531 static int dvb_frontend_release(struct inode *inode, struct file *file)
2533 struct dvb_device *dvbdev = file->private_data;
2534 struct dvb_frontend *fe = dvbdev->priv;
2535 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2538 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2540 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2541 fepriv->release_jiffies = jiffies;
2545 ret = dvb_generic_release (inode, file);
2547 if (dvbdev->users == -1) {
2548 wake_up(&fepriv->wait_queue);
2549 if (fe->exit != DVB_FE_NO_EXIT)
2550 wake_up(&dvbdev->wait_queue);
2551 if (fe->ops.ts_bus_ctrl)
2552 fe->ops.ts_bus_ctrl(fe, 0);
2558 static const struct file_operations dvb_frontend_fops = {
2559 .owner = THIS_MODULE,
2560 .unlocked_ioctl = dvb_generic_ioctl,
2561 .poll = dvb_frontend_poll,
2562 .open = dvb_frontend_open,
2563 .release = dvb_frontend_release,
2564 .llseek = noop_llseek,
2567 int dvb_frontend_suspend(struct dvb_frontend *fe)
2571 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2574 if (fe->ops.tuner_ops.suspend)
2575 ret = fe->ops.tuner_ops.suspend(fe);
2576 else if (fe->ops.tuner_ops.sleep)
2577 ret = fe->ops.tuner_ops.sleep(fe);
2580 ret = fe->ops.sleep(fe);
2584 EXPORT_SYMBOL(dvb_frontend_suspend);
2586 int dvb_frontend_resume(struct dvb_frontend *fe)
2588 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2591 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2594 fe->exit = DVB_FE_DEVICE_RESUME;
2596 ret = fe->ops.init(fe);
2598 if (fe->ops.tuner_ops.resume)
2599 ret = fe->ops.tuner_ops.resume(fe);
2600 else if (fe->ops.tuner_ops.init)
2601 ret = fe->ops.tuner_ops.init(fe);
2603 fe->exit = DVB_FE_NO_EXIT;
2604 fepriv->state = FESTATE_RETUNE;
2605 dvb_frontend_wakeup(fe);
2609 EXPORT_SYMBOL(dvb_frontend_resume);
2611 int dvb_register_frontend(struct dvb_adapter* dvb,
2612 struct dvb_frontend* fe)
2614 struct dvb_frontend_private *fepriv;
2615 static const struct dvb_device dvbdev_template = {
2619 .fops = &dvb_frontend_fops,
2620 .kernel_ioctl = dvb_frontend_ioctl
2623 dev_dbg(dvb->device, "%s:\n", __func__);
2625 if (mutex_lock_interruptible(&frontend_mutex))
2626 return -ERESTARTSYS;
2628 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2629 if (fe->frontend_priv == NULL) {
2630 mutex_unlock(&frontend_mutex);
2633 fepriv = fe->frontend_priv;
2635 sema_init(&fepriv->sem, 1);
2636 init_waitqueue_head (&fepriv->wait_queue);
2637 init_waitqueue_head (&fepriv->events.wait_queue);
2638 mutex_init(&fepriv->events.mtx);
2640 fepriv->inversion = INVERSION_OFF;
2642 dev_info(fe->dvb->device,
2643 "DVB: registering adapter %i frontend %i (%s)...\n",
2644 fe->dvb->num, fe->id, fe->ops.info.name);
2646 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2647 fe, DVB_DEVICE_FRONTEND);
2650 * Initialize the cache to the proper values according with the
2651 * first supported delivery system (ops->delsys[0])
2654 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2655 dvb_frontend_clear_cache(fe);
2657 mutex_unlock(&frontend_mutex);
2660 EXPORT_SYMBOL(dvb_register_frontend);
2662 int dvb_unregister_frontend(struct dvb_frontend* fe)
2664 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2665 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2667 mutex_lock(&frontend_mutex);
2668 dvb_frontend_stop (fe);
2669 mutex_unlock(&frontend_mutex);
2671 if (fepriv->dvbdev->users < -1)
2672 wait_event(fepriv->dvbdev->wait_queue,
2673 fepriv->dvbdev->users==-1);
2675 mutex_lock(&frontend_mutex);
2676 dvb_unregister_device (fepriv->dvbdev);
2678 /* fe is invalid now */
2680 mutex_unlock(&frontend_mutex);
2683 EXPORT_SYMBOL(dvb_unregister_frontend);
2685 #ifdef CONFIG_MEDIA_ATTACH
2686 void dvb_frontend_detach(struct dvb_frontend* fe)
2690 if (fe->ops.release_sec) {
2691 fe->ops.release_sec(fe);
2692 dvb_detach(fe->ops.release_sec);
2694 if (fe->ops.tuner_ops.release) {
2695 fe->ops.tuner_ops.release(fe);
2696 dvb_detach(fe->ops.tuner_ops.release);
2698 if (fe->ops.analog_ops.release) {
2699 fe->ops.analog_ops.release(fe);
2700 dvb_detach(fe->ops.analog_ops.release);
2702 ptr = (void*)fe->ops.release;
2704 fe->ops.release(fe);
2709 void dvb_frontend_detach(struct dvb_frontend* fe)
2711 if (fe->ops.release_sec)
2712 fe->ops.release_sec(fe);
2713 if (fe->ops.tuner_ops.release)
2714 fe->ops.tuner_ops.release(fe);
2715 if (fe->ops.analog_ops.release)
2716 fe->ops.analog_ops.release(fe);
2717 if (fe->ops.release)
2718 fe->ops.release(fe);
2721 EXPORT_SYMBOL(dvb_frontend_detach);