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 <linux/ktime.h>
44 #include <asm/processor.h>
46 #include "dvb_frontend.h"
48 #include <linux/dvb/version.h>
50 static int dvb_frontend_debug;
51 static int dvb_shutdown_timeout;
52 static int dvb_force_auto_inversion;
53 static int dvb_override_tune_delay;
54 static int dvb_powerdown_on_sleep = 1;
55 static int dvb_mfe_wait_time = 5;
57 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
58 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
59 module_param(dvb_shutdown_timeout, int, 0644);
60 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
61 module_param(dvb_force_auto_inversion, int, 0644);
62 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
63 module_param(dvb_override_tune_delay, int, 0644);
64 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
65 module_param(dvb_powerdown_on_sleep, int, 0644);
66 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
67 module_param(dvb_mfe_wait_time, int, 0644);
68 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)");
70 #define FESTATE_IDLE 1
71 #define FESTATE_RETUNE 2
72 #define FESTATE_TUNING_FAST 4
73 #define FESTATE_TUNING_SLOW 8
74 #define FESTATE_TUNED 16
75 #define FESTATE_ZIGZAG_FAST 32
76 #define FESTATE_ZIGZAG_SLOW 64
77 #define FESTATE_DISEQC 128
78 #define FESTATE_ERROR 256
79 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
80 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
81 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
82 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
86 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
87 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
88 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
89 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
90 * FESTATE_TUNED. The frontend has successfully locked on.
91 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
92 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
93 * FESTATE_DISEQC. A DISEQC command has just been issued.
94 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
95 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
96 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
97 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
100 static DEFINE_MUTEX(frontend_mutex);
102 struct dvb_frontend_private {
104 /* thread/frontend values */
105 struct dvb_device *dvbdev;
106 struct dvb_frontend_parameters parameters_out;
107 struct dvb_fe_events events;
108 struct semaphore sem;
109 struct list_head list_head;
110 wait_queue_head_t wait_queue;
111 struct task_struct *thread;
112 unsigned long release_jiffies;
114 enum fe_status status;
115 unsigned long tune_mode_flags;
117 unsigned int reinitialise;
121 /* swzigzag values */
123 unsigned int bending;
125 unsigned int inversion;
126 unsigned int auto_step;
127 unsigned int auto_sub_step;
128 unsigned int started_auto_step;
129 unsigned int min_delay;
130 unsigned int max_drift;
131 unsigned int step_size;
133 unsigned int check_wrapped;
134 enum dvbfe_search algo_status;
136 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
137 struct media_pipeline pipe;
138 struct media_entity *pipe_start_entity;
142 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
143 static int dtv_get_frontend(struct dvb_frontend *fe,
144 struct dvb_frontend_parameters *p_out);
145 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
146 struct dvb_frontend_parameters *p);
148 static bool has_get_frontend(struct dvb_frontend *fe)
150 return fe->ops.get_frontend != NULL;
154 * Due to DVBv3 API calls, a delivery system should be mapped into one of
155 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
156 * otherwise, a DVBv3 call will fail.
158 enum dvbv3_emulation_type {
166 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
168 switch (delivery_system) {
169 case SYS_DVBC_ANNEX_A:
170 case SYS_DVBC_ANNEX_C:
185 case SYS_DVBC_ANNEX_B:
193 * Doesn't know how to emulate those types and/or
194 * there's no frontend driver from this type yet
195 * with some emulation code, so, we're not sure yet how
196 * to handle them, or they're not compatible with a DVBv3 call.
198 return DVBV3_UNKNOWN;
202 static void dvb_frontend_add_event(struct dvb_frontend *fe,
203 enum fe_status status)
205 struct dvb_frontend_private *fepriv = fe->frontend_priv;
206 struct dvb_fe_events *events = &fepriv->events;
207 struct dvb_frontend_event *e;
210 dev_dbg(fe->dvb->device, "%s:\n", __func__);
212 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
213 dtv_get_frontend(fe, &fepriv->parameters_out);
215 mutex_lock(&events->mtx);
217 wp = (events->eventw + 1) % MAX_EVENT;
218 if (wp == events->eventr) {
219 events->overflow = 1;
220 events->eventr = (events->eventr + 1) % MAX_EVENT;
223 e = &events->events[events->eventw];
225 e->parameters = fepriv->parameters_out;
229 mutex_unlock(&events->mtx);
231 wake_up_interruptible (&events->wait_queue);
234 static int dvb_frontend_get_event(struct dvb_frontend *fe,
235 struct dvb_frontend_event *event, int flags)
237 struct dvb_frontend_private *fepriv = fe->frontend_priv;
238 struct dvb_fe_events *events = &fepriv->events;
240 dev_dbg(fe->dvb->device, "%s:\n", __func__);
242 if (events->overflow) {
243 events->overflow = 0;
247 if (events->eventw == events->eventr) {
250 if (flags & O_NONBLOCK)
255 ret = wait_event_interruptible (events->wait_queue,
256 events->eventw != events->eventr);
258 if (down_interruptible (&fepriv->sem))
265 mutex_lock(&events->mtx);
266 *event = events->events[events->eventr];
267 events->eventr = (events->eventr + 1) % MAX_EVENT;
268 mutex_unlock(&events->mtx);
273 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
275 struct dvb_frontend_private *fepriv = fe->frontend_priv;
276 struct dvb_fe_events *events = &fepriv->events;
278 mutex_lock(&events->mtx);
279 events->eventr = events->eventw;
280 mutex_unlock(&events->mtx);
283 static void dvb_frontend_init(struct dvb_frontend *fe)
285 dev_dbg(fe->dvb->device,
286 "%s: initialising adapter %i frontend %i (%s)...\n",
287 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
291 if (fe->ops.tuner_ops.init) {
292 if (fe->ops.i2c_gate_ctrl)
293 fe->ops.i2c_gate_ctrl(fe, 1);
294 fe->ops.tuner_ops.init(fe);
295 if (fe->ops.i2c_gate_ctrl)
296 fe->ops.i2c_gate_ctrl(fe, 0);
300 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
302 struct dvb_frontend_private *fepriv = fe->frontend_priv;
304 fepriv->reinitialise = 1;
305 dvb_frontend_wakeup(fe);
307 EXPORT_SYMBOL(dvb_frontend_reinitialise);
309 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
312 struct dvb_frontend *fe = fepriv->dvbdev->priv;
314 dev_dbg(fe->dvb->device, "%s:\n", __func__);
317 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
319 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
321 q2 = fepriv->quality - 128;
324 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
328 * Performs automatic twiddling of frontend parameters.
330 * @param fe The frontend concerned.
331 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
332 * @returns Number of complete iterations that have been performed.
334 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
339 struct dvb_frontend_private *fepriv = fe->frontend_priv;
340 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
341 int original_inversion = c->inversion;
342 u32 original_frequency = c->frequency;
344 /* are we using autoinversion? */
345 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
346 (c->inversion == INVERSION_AUTO));
348 /* setup parameters correctly */
350 /* calculate the lnb_drift */
351 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
353 /* wrap the auto_step if we've exceeded the maximum drift */
354 if (fepriv->lnb_drift > fepriv->max_drift) {
355 fepriv->auto_step = 0;
356 fepriv->auto_sub_step = 0;
357 fepriv->lnb_drift = 0;
360 /* perform inversion and +/- zigzag */
361 switch(fepriv->auto_sub_step) {
363 /* try with the current inversion and current drift setting */
368 if (!autoinversion) break;
370 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
375 if (fepriv->lnb_drift == 0) break;
377 fepriv->lnb_drift = -fepriv->lnb_drift;
382 if (fepriv->lnb_drift == 0) break;
383 if (!autoinversion) break;
385 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
386 fepriv->lnb_drift = -fepriv->lnb_drift;
392 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
396 if (!ready) fepriv->auto_sub_step++;
399 /* if this attempt would hit where we started, indicate a complete
400 * iteration has occurred */
401 if ((fepriv->auto_step == fepriv->started_auto_step) &&
402 (fepriv->auto_sub_step == 0) && check_wrapped) {
406 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
407 "auto_sub_step:%i started_auto_step:%i\n",
408 __func__, fepriv->lnb_drift, fepriv->inversion,
409 fepriv->auto_step, fepriv->auto_sub_step,
410 fepriv->started_auto_step);
412 /* set the frontend itself */
413 c->frequency += fepriv->lnb_drift;
415 c->inversion = fepriv->inversion;
417 if (fe->ops.set_frontend)
418 fe_set_err = fe->ops.set_frontend(fe);
420 if (fe_set_err < 0) {
421 fepriv->state = FESTATE_ERROR;
425 c->frequency = original_frequency;
426 c->inversion = original_inversion;
428 fepriv->auto_sub_step++;
432 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
434 enum fe_status s = 0;
436 struct dvb_frontend_private *fepriv = fe->frontend_priv;
437 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
439 /* if we've got no parameters, just keep idling */
440 if (fepriv->state & FESTATE_IDLE) {
441 fepriv->delay = 3*HZ;
446 /* in SCAN mode, we just set the frontend when asked and leave it alone */
447 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
448 if (fepriv->state & FESTATE_RETUNE) {
450 if (fe->ops.set_frontend)
451 retval = fe->ops.set_frontend(fe);
454 fepriv->state = FESTATE_ERROR;
456 fepriv->state = FESTATE_TUNED;
458 fepriv->delay = 3*HZ;
463 /* get the frontend status */
464 if (fepriv->state & FESTATE_RETUNE) {
467 if (fe->ops.read_status)
468 fe->ops.read_status(fe, &s);
469 if (s != fepriv->status) {
470 dvb_frontend_add_event(fe, s);
475 /* if we're not tuned, and we have a lock, move to the TUNED state */
476 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
477 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
478 fepriv->state = FESTATE_TUNED;
480 /* if we're tuned, then we have determined the correct inversion */
481 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
482 (c->inversion == INVERSION_AUTO)) {
483 c->inversion = fepriv->inversion;
488 /* if we are tuned already, check we're still locked */
489 if (fepriv->state & FESTATE_TUNED) {
490 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
492 /* we're tuned, and the lock is still good... */
493 if (s & FE_HAS_LOCK) {
495 } else { /* if we _WERE_ tuned, but now don't have a lock */
496 fepriv->state = FESTATE_ZIGZAG_FAST;
497 fepriv->started_auto_step = fepriv->auto_step;
498 fepriv->check_wrapped = 0;
502 /* don't actually do anything if we're in the LOSTLOCK state,
503 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
504 if ((fepriv->state & FESTATE_LOSTLOCK) &&
505 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
506 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
510 /* don't do anything if we're in the DISEQC state, since this
511 * might be someone with a motorized dish controlled by DISEQC.
512 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
513 if (fepriv->state & FESTATE_DISEQC) {
514 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
518 /* if we're in the RETUNE state, set everything up for a brand
519 * new scan, keeping the current inversion setting, as the next
520 * tune is _very_ likely to require the same */
521 if (fepriv->state & FESTATE_RETUNE) {
522 fepriv->lnb_drift = 0;
523 fepriv->auto_step = 0;
524 fepriv->auto_sub_step = 0;
525 fepriv->started_auto_step = 0;
526 fepriv->check_wrapped = 0;
530 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
531 fepriv->delay = fepriv->min_delay;
534 retval = dvb_frontend_swzigzag_autotune(fe,
535 fepriv->check_wrapped);
539 /* OK, if we've run out of trials at the fast speed.
540 * Drop back to slow for the _next_ attempt */
541 fepriv->state = FESTATE_SEARCHING_SLOW;
542 fepriv->started_auto_step = fepriv->auto_step;
545 fepriv->check_wrapped = 1;
547 /* if we've just retuned, enter the ZIGZAG_FAST state.
548 * This ensures we cannot return from an
549 * FE_SET_FRONTEND ioctl before the first frontend tune
551 if (fepriv->state & FESTATE_RETUNE) {
552 fepriv->state = FESTATE_TUNING_FAST;
557 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
558 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
560 /* Note: don't bother checking for wrapping; we stay in this
561 * state until we get a lock */
562 dvb_frontend_swzigzag_autotune(fe, 0);
566 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
568 struct dvb_frontend_private *fepriv = fe->frontend_priv;
570 if (fe->exit != DVB_FE_NO_EXIT)
573 if (fepriv->dvbdev->writers == 1)
574 if (time_after_eq(jiffies, fepriv->release_jiffies +
575 dvb_shutdown_timeout * HZ))
581 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
583 struct dvb_frontend_private *fepriv = fe->frontend_priv;
585 if (fepriv->wakeup) {
589 return dvb_frontend_is_exiting(fe);
592 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
594 struct dvb_frontend_private *fepriv = fe->frontend_priv;
597 wake_up_interruptible(&fepriv->wait_queue);
601 * dvb_enable_media_tuner() - tries to enable the DVB tuner
603 * @fe: struct dvb_frontend pointer
605 * This function ensures that just one media tuner is enabled for a given
606 * frontend. It has two different behaviors:
607 * - For trivial devices with just one tuner:
608 * it just enables the existing tuner->fe link
609 * - For devices with more than one tuner:
610 * It is up to the driver to implement the logic that will enable one tuner
611 * and disable the other ones. However, if more than one tuner is enabled for
612 * the same frontend, it will print an error message and return -EINVAL.
614 * At return, it will return the error code returned by media_entity_setup_link,
615 * or 0 if everything is OK, if no tuner is linked to the frontend or if the
618 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
619 static int dvb_enable_media_tuner(struct dvb_frontend *fe)
621 struct dvb_frontend_private *fepriv = fe->frontend_priv;
622 struct dvb_adapter *adapter = fe->dvb;
623 struct media_device *mdev = adapter->mdev;
624 struct media_entity *entity, *source;
625 struct media_link *link, *found_link = NULL;
626 int i, ret, n_links = 0, active_links = 0;
628 fepriv->pipe_start_entity = NULL;
633 entity = fepriv->dvbdev->entity;
634 fepriv->pipe_start_entity = entity;
636 for (i = 0; i < entity->num_links; i++) {
637 link = &entity->links[i];
638 if (link->sink->entity == entity) {
641 if (link->flags & MEDIA_LNK_FL_ENABLED)
646 if (!n_links || active_links == 1 || !found_link)
650 * If a frontend has more than one tuner linked, it is up to the driver
651 * to select with one will be the active one, as the frontend core can't
652 * guess. If the driver doesn't do that, it is a bug.
654 if (n_links > 1 && active_links != 1) {
655 dev_err(fe->dvb->device,
656 "WARNING: there are %d active links among %d tuners. This is a driver's bug!\n",
657 active_links, n_links);
661 source = found_link->source->entity;
662 fepriv->pipe_start_entity = source;
663 for (i = 0; i < source->num_links; i++) {
664 struct media_entity *sink;
667 link = &source->links[i];
668 sink = link->sink->entity;
671 flags = MEDIA_LNK_FL_ENABLED;
673 ret = media_entity_setup_link(link, flags);
675 dev_err(fe->dvb->device,
676 "Couldn't change link %s->%s to %s. Error %d\n",
677 source->name, sink->name,
678 flags ? "enabled" : "disabled",
682 dev_dbg(fe->dvb->device,
683 "link %s->%s was %s\n",
684 source->name, sink->name,
685 flags ? "ENABLED" : "disabled");
691 static int dvb_frontend_thread(void *data)
693 struct dvb_frontend *fe = data;
694 struct dvb_frontend_private *fepriv = fe->frontend_priv;
696 enum dvbfe_algo algo;
697 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
701 bool re_tune = false;
702 bool semheld = false;
704 dev_dbg(fe->dvb->device, "%s:\n", __func__);
706 fepriv->check_wrapped = 0;
708 fepriv->delay = 3*HZ;
711 fepriv->reinitialise = 0;
713 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
714 ret = dvb_enable_media_tuner(fe);
716 /* FIXME: return an error if it fails */
717 dev_info(fe->dvb->device,
718 "proceeding with FE task\n");
719 } else if (fepriv->pipe_start_entity) {
720 ret = media_entity_pipeline_start(fepriv->pipe_start_entity,
727 dvb_frontend_init(fe);
731 up(&fepriv->sem); /* is locked when we enter the thread... */
733 wait_event_interruptible_timeout(fepriv->wait_queue,
734 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
735 || freezing(current),
738 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
739 /* got signal or quitting */
740 if (!down_interruptible(&fepriv->sem))
742 fe->exit = DVB_FE_NORMAL_EXIT;
749 if (down_interruptible(&fepriv->sem))
752 if (fepriv->reinitialise) {
753 dvb_frontend_init(fe);
754 if (fe->ops.set_tone && fepriv->tone != -1)
755 fe->ops.set_tone(fe, fepriv->tone);
756 if (fe->ops.set_voltage && fepriv->voltage != -1)
757 fe->ops.set_voltage(fe, fepriv->voltage);
758 fepriv->reinitialise = 0;
761 /* do an iteration of the tuning loop */
762 if (fe->ops.get_frontend_algo) {
763 algo = fe->ops.get_frontend_algo(fe);
766 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
768 if (fepriv->state & FESTATE_RETUNE) {
769 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
771 fepriv->state = FESTATE_TUNED;
777 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
779 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
780 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
781 dvb_frontend_add_event(fe, s);
786 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
787 dvb_frontend_swzigzag(fe);
789 case DVBFE_ALGO_CUSTOM:
790 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
791 if (fepriv->state & FESTATE_RETUNE) {
792 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
793 fepriv->state = FESTATE_TUNED;
795 /* Case where we are going to search for a carrier
796 * User asked us to retune again for some reason, possibly
797 * requesting a search with a new set of parameters
799 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
800 if (fe->ops.search) {
801 fepriv->algo_status = fe->ops.search(fe);
802 /* We did do a search as was requested, the flags are
803 * now unset as well and has the flags wrt to search.
806 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
809 /* Track the carrier if the search was successful */
810 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
811 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
812 fepriv->delay = HZ / 2;
814 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
815 fe->ops.read_status(fe, &s);
816 if (s != fepriv->status) {
817 dvb_frontend_add_event(fe, s); /* update event list */
819 if (!(s & FE_HAS_LOCK)) {
820 fepriv->delay = HZ / 10;
821 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
823 fepriv->delay = 60 * HZ;
828 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
832 dvb_frontend_swzigzag(fe);
836 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
837 if (fepriv->pipe_start_entity)
838 media_entity_pipeline_stop(fepriv->pipe_start_entity);
839 fepriv->pipe_start_entity = NULL;
842 if (dvb_powerdown_on_sleep) {
843 if (fe->ops.set_voltage)
844 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
845 if (fe->ops.tuner_ops.sleep) {
846 if (fe->ops.i2c_gate_ctrl)
847 fe->ops.i2c_gate_ctrl(fe, 1);
848 fe->ops.tuner_ops.sleep(fe);
849 if (fe->ops.i2c_gate_ctrl)
850 fe->ops.i2c_gate_ctrl(fe, 0);
856 fepriv->thread = NULL;
857 if (kthread_should_stop())
858 fe->exit = DVB_FE_DEVICE_REMOVED;
860 fe->exit = DVB_FE_NO_EXIT;
865 dvb_frontend_wakeup(fe);
869 static void dvb_frontend_stop(struct dvb_frontend *fe)
871 struct dvb_frontend_private *fepriv = fe->frontend_priv;
873 dev_dbg(fe->dvb->device, "%s:\n", __func__);
875 if (fe->exit != DVB_FE_DEVICE_REMOVED)
876 fe->exit = DVB_FE_NORMAL_EXIT;
882 kthread_stop(fepriv->thread);
884 sema_init(&fepriv->sem, 1);
885 fepriv->state = FESTATE_IDLE;
887 /* paranoia check in case a signal arrived */
889 dev_warn(fe->dvb->device,
890 "dvb_frontend_stop: warning: thread %p won't exit\n",
895 * Sleep until gettimeofday() > waketime + add_usec
896 * This needs to be as precise as possible, but as the delay is
897 * usually between 2ms and 32ms, it is done using a scheduled msleep
898 * followed by usleep (normally a busy-wait loop) for the remainder
900 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
904 ktime_add_us(*waketime, add_usec);
905 delta = ktime_us_delta(ktime_get_real(), *waketime);
907 msleep((delta - 1500) / 1000);
908 newdelta = ktime_us_delta(ktime_get_real(), *waketime);
909 delta = (newdelta > delta) ? 0 : newdelta;
914 EXPORT_SYMBOL(dvb_frontend_sleep_until);
916 static int dvb_frontend_start(struct dvb_frontend *fe)
919 struct dvb_frontend_private *fepriv = fe->frontend_priv;
920 struct task_struct *fe_thread;
922 dev_dbg(fe->dvb->device, "%s:\n", __func__);
924 if (fepriv->thread) {
925 if (fe->exit == DVB_FE_NO_EXIT)
928 dvb_frontend_stop (fe);
931 if (signal_pending(current))
933 if (down_interruptible (&fepriv->sem))
936 fepriv->state = FESTATE_IDLE;
937 fe->exit = DVB_FE_NO_EXIT;
938 fepriv->thread = NULL;
941 fe_thread = kthread_run(dvb_frontend_thread, fe,
942 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
943 if (IS_ERR(fe_thread)) {
944 ret = PTR_ERR(fe_thread);
945 dev_warn(fe->dvb->device,
946 "dvb_frontend_start: failed to start kthread (%d)\n",
951 fepriv->thread = fe_thread;
955 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
956 u32 *freq_min, u32 *freq_max)
958 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
960 if (fe->ops.info.frequency_max == 0)
961 *freq_max = fe->ops.tuner_ops.info.frequency_max;
962 else if (fe->ops.tuner_ops.info.frequency_max == 0)
963 *freq_max = fe->ops.info.frequency_max;
965 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
967 if (*freq_min == 0 || *freq_max == 0)
968 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
969 fe->dvb->num, fe->id);
972 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
974 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
978 /* range check: frequency */
979 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
980 if ((freq_min && c->frequency < freq_min) ||
981 (freq_max && c->frequency > freq_max)) {
982 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
983 fe->dvb->num, fe->id, c->frequency,
988 /* range check: symbol rate */
989 switch (c->delivery_system) {
993 case SYS_DVBC_ANNEX_A:
994 case SYS_DVBC_ANNEX_C:
995 if ((fe->ops.info.symbol_rate_min &&
996 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
997 (fe->ops.info.symbol_rate_max &&
998 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
999 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
1000 fe->dvb->num, fe->id, c->symbol_rate,
1001 fe->ops.info.symbol_rate_min,
1002 fe->ops.info.symbol_rate_max);
1012 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
1014 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1018 delsys = c->delivery_system;
1019 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
1020 c->delivery_system = delsys;
1022 c->state = DTV_CLEAR;
1024 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1025 __func__, c->delivery_system);
1027 c->transmission_mode = TRANSMISSION_MODE_AUTO;
1028 c->bandwidth_hz = 0; /* AUTO */
1029 c->guard_interval = GUARD_INTERVAL_AUTO;
1030 c->hierarchy = HIERARCHY_AUTO;
1032 c->code_rate_HP = FEC_AUTO;
1033 c->code_rate_LP = FEC_AUTO;
1034 c->fec_inner = FEC_AUTO;
1035 c->rolloff = ROLLOFF_AUTO;
1036 c->voltage = SEC_VOLTAGE_OFF;
1037 c->sectone = SEC_TONE_OFF;
1038 c->pilot = PILOT_AUTO;
1040 c->isdbt_partial_reception = 0;
1041 c->isdbt_sb_mode = 0;
1042 c->isdbt_sb_subchannel = 0;
1043 c->isdbt_sb_segment_idx = 0;
1044 c->isdbt_sb_segment_count = 0;
1045 c->isdbt_layer_enabled = 0;
1046 for (i = 0; i < 3; i++) {
1047 c->layer[i].fec = FEC_AUTO;
1048 c->layer[i].modulation = QAM_AUTO;
1049 c->layer[i].interleaving = 0;
1050 c->layer[i].segment_count = 0;
1053 c->stream_id = NO_STREAM_ID_FILTER;
1055 switch (c->delivery_system) {
1059 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1060 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1063 c->modulation = VSB_8;
1066 c->symbol_rate = 28860000;
1067 c->rolloff = ROLLOFF_35;
1068 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1071 c->modulation = QAM_AUTO;
1080 #define _DTV_CMD(n, s, b) \
1088 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1089 _DTV_CMD(DTV_TUNE, 1, 0),
1090 _DTV_CMD(DTV_CLEAR, 1, 0),
1093 _DTV_CMD(DTV_FREQUENCY, 1, 0),
1094 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1095 _DTV_CMD(DTV_MODULATION, 1, 0),
1096 _DTV_CMD(DTV_INVERSION, 1, 0),
1097 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1098 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1099 _DTV_CMD(DTV_INNER_FEC, 1, 0),
1100 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1101 _DTV_CMD(DTV_TONE, 1, 0),
1102 _DTV_CMD(DTV_PILOT, 1, 0),
1103 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1104 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1105 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1106 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1107 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1108 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1109 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1110 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1112 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1113 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1114 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1115 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1116 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1117 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1118 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1119 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1120 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1121 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1122 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1123 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1124 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1125 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1126 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1127 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1128 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1129 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1131 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1132 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1133 _DTV_CMD(DTV_LNA, 1, 0),
1136 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1137 _DTV_CMD(DTV_API_VERSION, 0, 0),
1139 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1141 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1142 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1144 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1145 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1146 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1147 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1148 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1149 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1150 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1151 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1152 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1153 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1154 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1155 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1156 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1158 /* Statistics API */
1159 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1160 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1161 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1162 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1163 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1164 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1165 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1166 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1169 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1173 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1174 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1175 __func__, tvp->cmd);
1179 dev_dbg(fe->dvb->device, "%s: tvp.cmd = 0x%08x (%s)\n", __func__,
1180 tvp->cmd, dtv_cmds[tvp->cmd].name);
1182 if (dtv_cmds[tvp->cmd].buffer) {
1183 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1184 __func__, tvp->u.buffer.len);
1186 for(i = 0; i < tvp->u.buffer.len; i++)
1187 dev_dbg(fe->dvb->device,
1188 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1189 __func__, i, tvp->u.buffer.data[i]);
1191 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1196 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1197 * drivers can use a single set_frontend tuning function, regardless of whether
1198 * it's being used for the legacy or new API, reducing code and complexity.
1200 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1201 struct dtv_frontend_properties *c,
1202 const struct dvb_frontend_parameters *p)
1204 c->frequency = p->frequency;
1205 c->inversion = p->inversion;
1207 switch (dvbv3_type(c->delivery_system)) {
1209 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1210 c->symbol_rate = p->u.qpsk.symbol_rate;
1211 c->fec_inner = p->u.qpsk.fec_inner;
1214 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1215 c->symbol_rate = p->u.qam.symbol_rate;
1216 c->fec_inner = p->u.qam.fec_inner;
1217 c->modulation = p->u.qam.modulation;
1220 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1222 switch (p->u.ofdm.bandwidth) {
1223 case BANDWIDTH_10_MHZ:
1224 c->bandwidth_hz = 10000000;
1226 case BANDWIDTH_8_MHZ:
1227 c->bandwidth_hz = 8000000;
1229 case BANDWIDTH_7_MHZ:
1230 c->bandwidth_hz = 7000000;
1232 case BANDWIDTH_6_MHZ:
1233 c->bandwidth_hz = 6000000;
1235 case BANDWIDTH_5_MHZ:
1236 c->bandwidth_hz = 5000000;
1238 case BANDWIDTH_1_712_MHZ:
1239 c->bandwidth_hz = 1712000;
1241 case BANDWIDTH_AUTO:
1242 c->bandwidth_hz = 0;
1245 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1246 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1247 c->modulation = p->u.ofdm.constellation;
1248 c->transmission_mode = p->u.ofdm.transmission_mode;
1249 c->guard_interval = p->u.ofdm.guard_interval;
1250 c->hierarchy = p->u.ofdm.hierarchy_information;
1253 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1254 c->modulation = p->u.vsb.modulation;
1255 if (c->delivery_system == SYS_ATSCMH)
1257 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1258 c->delivery_system = SYS_ATSC;
1260 c->delivery_system = SYS_DVBC_ANNEX_B;
1263 dev_err(fe->dvb->device,
1264 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1265 __func__, c->delivery_system);
1272 /* Ensure the cached values are set correctly in the frontend
1273 * legacy tuning structures, for the advanced tuning API.
1275 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1276 struct dvb_frontend_parameters *p)
1278 const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1280 p->frequency = c->frequency;
1281 p->inversion = c->inversion;
1283 switch (dvbv3_type(c->delivery_system)) {
1285 dev_err(fe->dvb->device,
1286 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1287 __func__, c->delivery_system);
1290 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1291 p->u.qpsk.symbol_rate = c->symbol_rate;
1292 p->u.qpsk.fec_inner = c->fec_inner;
1295 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1296 p->u.qam.symbol_rate = c->symbol_rate;
1297 p->u.qam.fec_inner = c->fec_inner;
1298 p->u.qam.modulation = c->modulation;
1301 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1302 switch (c->bandwidth_hz) {
1304 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1307 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1310 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1313 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1316 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1319 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1323 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1325 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1326 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1327 p->u.ofdm.constellation = c->modulation;
1328 p->u.ofdm.transmission_mode = c->transmission_mode;
1329 p->u.ofdm.guard_interval = c->guard_interval;
1330 p->u.ofdm.hierarchy_information = c->hierarchy;
1333 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1334 p->u.vsb.modulation = c->modulation;
1341 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1342 * @fe: struct dvb_frontend pointer
1343 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1344 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1346 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1347 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1348 * If p_out is not null, it will update the DVBv3 params pointed by it.
1350 static int dtv_get_frontend(struct dvb_frontend *fe,
1351 struct dvb_frontend_parameters *p_out)
1355 if (fe->ops.get_frontend) {
1356 r = fe->ops.get_frontend(fe);
1357 if (unlikely(r < 0))
1360 dtv_property_legacy_params_sync(fe, p_out);
1364 /* As everything is in cache, get_frontend fops are always supported */
1368 static int dvb_frontend_ioctl_legacy(struct file *file,
1369 unsigned int cmd, void *parg);
1370 static int dvb_frontend_ioctl_properties(struct file *file,
1371 unsigned int cmd, void *parg);
1373 static int dtv_property_process_get(struct dvb_frontend *fe,
1374 const struct dtv_frontend_properties *c,
1375 struct dtv_property *tvp,
1381 case DTV_ENUM_DELSYS:
1383 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1384 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1387 tvp->u.buffer.len = ncaps;
1390 tvp->u.data = c->frequency;
1392 case DTV_MODULATION:
1393 tvp->u.data = c->modulation;
1395 case DTV_BANDWIDTH_HZ:
1396 tvp->u.data = c->bandwidth_hz;
1399 tvp->u.data = c->inversion;
1401 case DTV_SYMBOL_RATE:
1402 tvp->u.data = c->symbol_rate;
1405 tvp->u.data = c->fec_inner;
1408 tvp->u.data = c->pilot;
1411 tvp->u.data = c->rolloff;
1413 case DTV_DELIVERY_SYSTEM:
1414 tvp->u.data = c->delivery_system;
1417 tvp->u.data = c->voltage;
1420 tvp->u.data = c->sectone;
1422 case DTV_API_VERSION:
1423 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1425 case DTV_CODE_RATE_HP:
1426 tvp->u.data = c->code_rate_HP;
1428 case DTV_CODE_RATE_LP:
1429 tvp->u.data = c->code_rate_LP;
1431 case DTV_GUARD_INTERVAL:
1432 tvp->u.data = c->guard_interval;
1434 case DTV_TRANSMISSION_MODE:
1435 tvp->u.data = c->transmission_mode;
1438 tvp->u.data = c->hierarchy;
1440 case DTV_INTERLEAVING:
1441 tvp->u.data = c->interleaving;
1444 /* ISDB-T Support here */
1445 case DTV_ISDBT_PARTIAL_RECEPTION:
1446 tvp->u.data = c->isdbt_partial_reception;
1448 case DTV_ISDBT_SOUND_BROADCASTING:
1449 tvp->u.data = c->isdbt_sb_mode;
1451 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1452 tvp->u.data = c->isdbt_sb_subchannel;
1454 case DTV_ISDBT_SB_SEGMENT_IDX:
1455 tvp->u.data = c->isdbt_sb_segment_idx;
1457 case DTV_ISDBT_SB_SEGMENT_COUNT:
1458 tvp->u.data = c->isdbt_sb_segment_count;
1460 case DTV_ISDBT_LAYER_ENABLED:
1461 tvp->u.data = c->isdbt_layer_enabled;
1463 case DTV_ISDBT_LAYERA_FEC:
1464 tvp->u.data = c->layer[0].fec;
1466 case DTV_ISDBT_LAYERA_MODULATION:
1467 tvp->u.data = c->layer[0].modulation;
1469 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1470 tvp->u.data = c->layer[0].segment_count;
1472 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1473 tvp->u.data = c->layer[0].interleaving;
1475 case DTV_ISDBT_LAYERB_FEC:
1476 tvp->u.data = c->layer[1].fec;
1478 case DTV_ISDBT_LAYERB_MODULATION:
1479 tvp->u.data = c->layer[1].modulation;
1481 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1482 tvp->u.data = c->layer[1].segment_count;
1484 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1485 tvp->u.data = c->layer[1].interleaving;
1487 case DTV_ISDBT_LAYERC_FEC:
1488 tvp->u.data = c->layer[2].fec;
1490 case DTV_ISDBT_LAYERC_MODULATION:
1491 tvp->u.data = c->layer[2].modulation;
1493 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1494 tvp->u.data = c->layer[2].segment_count;
1496 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1497 tvp->u.data = c->layer[2].interleaving;
1500 /* Multistream support */
1502 case DTV_DVBT2_PLP_ID_LEGACY:
1503 tvp->u.data = c->stream_id;
1507 case DTV_ATSCMH_FIC_VER:
1508 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1510 case DTV_ATSCMH_PARADE_ID:
1511 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1513 case DTV_ATSCMH_NOG:
1514 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1516 case DTV_ATSCMH_TNOG:
1517 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1519 case DTV_ATSCMH_SGN:
1520 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1522 case DTV_ATSCMH_PRC:
1523 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1525 case DTV_ATSCMH_RS_FRAME_MODE:
1526 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1528 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1529 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1531 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1532 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1534 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1535 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1537 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1538 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1540 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1541 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1543 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1544 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1546 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1547 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1549 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1550 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1554 tvp->u.data = c->lna;
1557 /* Fill quality measures */
1558 case DTV_STAT_SIGNAL_STRENGTH:
1559 tvp->u.st = c->strength;
1564 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1565 tvp->u.st = c->pre_bit_error;
1567 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1568 tvp->u.st = c->pre_bit_count;
1570 case DTV_STAT_POST_ERROR_BIT_COUNT:
1571 tvp->u.st = c->post_bit_error;
1573 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1574 tvp->u.st = c->post_bit_count;
1576 case DTV_STAT_ERROR_BLOCK_COUNT:
1577 tvp->u.st = c->block_error;
1579 case DTV_STAT_TOTAL_BLOCK_COUNT:
1580 tvp->u.st = c->block_count;
1583 dev_dbg(fe->dvb->device,
1584 "%s: FE property %d doesn't exist\n",
1585 __func__, tvp->cmd);
1589 /* Allow the frontend to override outgoing properties */
1590 if (fe->ops.get_property) {
1591 r = fe->ops.get_property(fe, tvp);
1596 dtv_property_dump(fe, tvp);
1601 static int dtv_set_frontend(struct dvb_frontend *fe);
1603 static bool is_dvbv3_delsys(u32 delsys)
1607 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1608 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1614 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1615 * @fe: struct frontend;
1616 * @delsys: DVBv5 type that will be used for emulation
1618 * Provides emulation for delivery systems that are compatible with the old
1619 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1620 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1621 * parameters are compatible with DVB-S spec.
1623 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1626 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1628 c->delivery_system = delsys;
1631 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1633 if (c->delivery_system == SYS_ISDBT) {
1634 dev_dbg(fe->dvb->device,
1635 "%s: Using defaults for SYS_ISDBT\n",
1638 if (!c->bandwidth_hz)
1639 c->bandwidth_hz = 6000000;
1641 c->isdbt_partial_reception = 0;
1642 c->isdbt_sb_mode = 0;
1643 c->isdbt_sb_subchannel = 0;
1644 c->isdbt_sb_segment_idx = 0;
1645 c->isdbt_sb_segment_count = 0;
1646 c->isdbt_layer_enabled = 7;
1647 for (i = 0; i < 3; i++) {
1648 c->layer[i].fec = FEC_AUTO;
1649 c->layer[i].modulation = QAM_AUTO;
1650 c->layer[i].interleaving = 0;
1651 c->layer[i].segment_count = 0;
1654 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1655 __func__, c->delivery_system);
1661 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1662 * @fe: frontend struct
1663 * @desired_system: delivery system requested by the user
1665 * A DVBv5 call know what's the desired system it wants. So, set it.
1667 * There are, however, a few known issues with early DVBv5 applications that
1668 * are also handled by this logic:
1670 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1671 * This is an API violation, but, as we don't want to break userspace,
1672 * convert it to the first supported delivery system.
1673 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1674 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1675 * ISDB-T provided backward compat with DVB-T.
1677 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1681 u32 delsys = SYS_UNDEFINED;
1682 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1683 enum dvbv3_emulation_type type;
1686 * It was reported that some old DVBv5 applications were
1687 * filling delivery_system with SYS_UNDEFINED. If this happens,
1688 * assume that the application wants to use the first supported
1691 if (desired_system == SYS_UNDEFINED)
1692 desired_system = fe->ops.delsys[0];
1695 * This is a DVBv5 call. So, it likely knows the supported
1696 * delivery systems. So, check if the desired delivery system is
1700 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1701 if (fe->ops.delsys[ncaps] == desired_system) {
1702 c->delivery_system = desired_system;
1703 dev_dbg(fe->dvb->device,
1704 "%s: Changing delivery system to %d\n",
1705 __func__, desired_system);
1712 * The requested delivery system isn't supported. Maybe userspace
1713 * is requesting a DVBv3 compatible delivery system.
1715 * The emulation only works if the desired system is one of the
1716 * delivery systems supported by DVBv3 API
1718 if (!is_dvbv3_delsys(desired_system)) {
1719 dev_dbg(fe->dvb->device,
1720 "%s: Delivery system %d not supported.\n",
1721 __func__, desired_system);
1725 type = dvbv3_type(desired_system);
1728 * Get the last non-DVBv3 delivery system that has the same type
1729 * of the desired system
1732 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1733 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1734 delsys = fe->ops.delsys[ncaps];
1738 /* There's nothing compatible with the desired delivery system */
1739 if (delsys == SYS_UNDEFINED) {
1740 dev_dbg(fe->dvb->device,
1741 "%s: Delivery system %d not supported on emulation mode.\n",
1742 __func__, desired_system);
1746 dev_dbg(fe->dvb->device,
1747 "%s: Using delivery system %d emulated as if it were %d\n",
1748 __func__, delsys, desired_system);
1750 return emulate_delivery_system(fe, desired_system);
1754 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1755 * @fe: frontend struct
1757 * A DVBv3 call doesn't know what's the desired system it wants. It also
1758 * doesn't allow to switch between different types. Due to that, userspace
1759 * should use DVBv5 instead.
1760 * However, in order to avoid breaking userspace API, limited backward
1761 * compatibility support is provided.
1763 * There are some delivery systems that are incompatible with DVBv3 calls.
1765 * This routine should work fine for frontends that support just one delivery
1768 * For frontends that support multiple frontends:
1769 * 1) It defaults to use the first supported delivery system. There's an
1770 * userspace application that allows changing it at runtime;
1772 * 2) If the current delivery system is not compatible with DVBv3, it gets
1773 * the first one that it is compatible.
1775 * NOTE: in order for this to work with applications like Kaffeine that
1776 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1777 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1778 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1781 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1784 u32 delsys = SYS_UNDEFINED;
1785 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1787 /* If not set yet, defaults to the first supported delivery system */
1788 if (c->delivery_system == SYS_UNDEFINED)
1789 c->delivery_system = fe->ops.delsys[0];
1792 * Trivial case: just use the current one, if it already a DVBv3
1795 if (is_dvbv3_delsys(c->delivery_system)) {
1796 dev_dbg(fe->dvb->device,
1797 "%s: Using delivery system to %d\n",
1798 __func__, c->delivery_system);
1803 * Seek for the first delivery system that it is compatible with a
1807 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1808 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1809 delsys = fe->ops.delsys[ncaps];
1814 if (delsys == SYS_UNDEFINED) {
1815 dev_dbg(fe->dvb->device,
1816 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1820 return emulate_delivery_system(fe, delsys);
1823 static int dtv_property_process_set(struct dvb_frontend *fe,
1824 struct dtv_property *tvp,
1828 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1830 /* Allow the frontend to validate incoming properties */
1831 if (fe->ops.set_property) {
1832 r = fe->ops.set_property(fe, tvp);
1840 * Reset a cache of data specific to the frontend here. This does
1841 * not effect hardware.
1843 dvb_frontend_clear_cache(fe);
1846 /* interpret the cache of data, build either a traditional frontend
1847 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1850 c->state = tvp->cmd;
1851 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1854 r = dtv_set_frontend(fe);
1857 c->frequency = tvp->u.data;
1859 case DTV_MODULATION:
1860 c->modulation = tvp->u.data;
1862 case DTV_BANDWIDTH_HZ:
1863 c->bandwidth_hz = tvp->u.data;
1866 c->inversion = tvp->u.data;
1868 case DTV_SYMBOL_RATE:
1869 c->symbol_rate = tvp->u.data;
1872 c->fec_inner = tvp->u.data;
1875 c->pilot = tvp->u.data;
1878 c->rolloff = tvp->u.data;
1880 case DTV_DELIVERY_SYSTEM:
1881 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1884 c->voltage = tvp->u.data;
1885 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1886 (void *)c->voltage);
1889 c->sectone = tvp->u.data;
1890 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1891 (void *)c->sectone);
1893 case DTV_CODE_RATE_HP:
1894 c->code_rate_HP = tvp->u.data;
1896 case DTV_CODE_RATE_LP:
1897 c->code_rate_LP = tvp->u.data;
1899 case DTV_GUARD_INTERVAL:
1900 c->guard_interval = tvp->u.data;
1902 case DTV_TRANSMISSION_MODE:
1903 c->transmission_mode = tvp->u.data;
1906 c->hierarchy = tvp->u.data;
1908 case DTV_INTERLEAVING:
1909 c->interleaving = tvp->u.data;
1912 /* ISDB-T Support here */
1913 case DTV_ISDBT_PARTIAL_RECEPTION:
1914 c->isdbt_partial_reception = tvp->u.data;
1916 case DTV_ISDBT_SOUND_BROADCASTING:
1917 c->isdbt_sb_mode = tvp->u.data;
1919 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1920 c->isdbt_sb_subchannel = tvp->u.data;
1922 case DTV_ISDBT_SB_SEGMENT_IDX:
1923 c->isdbt_sb_segment_idx = tvp->u.data;
1925 case DTV_ISDBT_SB_SEGMENT_COUNT:
1926 c->isdbt_sb_segment_count = tvp->u.data;
1928 case DTV_ISDBT_LAYER_ENABLED:
1929 c->isdbt_layer_enabled = tvp->u.data;
1931 case DTV_ISDBT_LAYERA_FEC:
1932 c->layer[0].fec = tvp->u.data;
1934 case DTV_ISDBT_LAYERA_MODULATION:
1935 c->layer[0].modulation = tvp->u.data;
1937 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1938 c->layer[0].segment_count = tvp->u.data;
1940 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1941 c->layer[0].interleaving = tvp->u.data;
1943 case DTV_ISDBT_LAYERB_FEC:
1944 c->layer[1].fec = tvp->u.data;
1946 case DTV_ISDBT_LAYERB_MODULATION:
1947 c->layer[1].modulation = tvp->u.data;
1949 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1950 c->layer[1].segment_count = tvp->u.data;
1952 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1953 c->layer[1].interleaving = tvp->u.data;
1955 case DTV_ISDBT_LAYERC_FEC:
1956 c->layer[2].fec = tvp->u.data;
1958 case DTV_ISDBT_LAYERC_MODULATION:
1959 c->layer[2].modulation = tvp->u.data;
1961 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1962 c->layer[2].segment_count = tvp->u.data;
1964 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1965 c->layer[2].interleaving = tvp->u.data;
1968 /* Multistream support */
1970 case DTV_DVBT2_PLP_ID_LEGACY:
1971 c->stream_id = tvp->u.data;
1975 case DTV_ATSCMH_PARADE_ID:
1976 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1978 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1979 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1983 c->lna = tvp->u.data;
1984 if (fe->ops.set_lna)
1985 r = fe->ops.set_lna(fe);
1997 static int dvb_frontend_ioctl(struct file *file,
1998 unsigned int cmd, void *parg)
2000 struct dvb_device *dvbdev = file->private_data;
2001 struct dvb_frontend *fe = dvbdev->priv;
2002 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2003 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2004 int err = -EOPNOTSUPP;
2006 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
2007 if (down_interruptible(&fepriv->sem))
2008 return -ERESTARTSYS;
2010 if (fe->exit != DVB_FE_NO_EXIT) {
2015 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
2016 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
2017 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2022 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
2023 err = dvb_frontend_ioctl_properties(file, cmd, parg);
2025 c->state = DTV_UNDEFINED;
2026 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
2033 static int dvb_frontend_ioctl_properties(struct file *file,
2034 unsigned int cmd, void *parg)
2036 struct dvb_device *dvbdev = file->private_data;
2037 struct dvb_frontend *fe = dvbdev->priv;
2038 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2039 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2042 struct dtv_properties *tvps = parg;
2043 struct dtv_property *tvp = NULL;
2046 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2048 if (cmd == FE_SET_PROPERTY) {
2049 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2050 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2052 /* Put an arbitrary limit on the number of messages that can
2053 * be sent at once */
2054 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2057 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2063 if (copy_from_user(tvp, (void __user *)tvps->props,
2064 tvps->num * sizeof(struct dtv_property))) {
2069 for (i = 0; i < tvps->num; i++) {
2070 err = dtv_property_process_set(fe, tvp + i, file);
2073 (tvp + i)->result = err;
2076 if (c->state == DTV_TUNE)
2077 dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
2079 } else if (cmd == FE_GET_PROPERTY) {
2080 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2081 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2083 /* Put an arbitrary limit on the number of messages that can
2084 * be sent at once */
2085 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2088 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2094 if (copy_from_user(tvp, (void __user *)tvps->props,
2095 tvps->num * sizeof(struct dtv_property))) {
2101 * Fills the cache out struct with the cache contents, plus
2102 * the data retrieved from get_frontend, if the frontend
2103 * is not idle. Otherwise, returns the cached content
2105 if (fepriv->state != FESTATE_IDLE) {
2106 err = dtv_get_frontend(fe, NULL);
2110 for (i = 0; i < tvps->num; i++) {
2111 err = dtv_property_process_get(fe, c, tvp + i, file);
2114 (tvp + i)->result = err;
2117 if (copy_to_user((void __user *)tvps->props, tvp,
2118 tvps->num * sizeof(struct dtv_property))) {
2131 static int dtv_set_frontend(struct dvb_frontend *fe)
2133 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2134 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2135 struct dvb_frontend_tune_settings fetunesettings;
2138 if (dvb_frontend_check_parameters(fe) < 0)
2142 * Initialize output parameters to match the values given by
2143 * the user. FE_SET_FRONTEND triggers an initial frontend event
2144 * with status = 0, which copies output parameters to userspace.
2146 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2149 * Be sure that the bandwidth will be filled for all
2150 * non-satellite systems, as tuners need to know what
2151 * low pass/Nyquist half filter should be applied, in
2152 * order to avoid inter-channel noise.
2154 * ISDB-T and DVB-T/T2 already sets bandwidth.
2155 * ATSC and DVB-C don't set, so, the core should fill it.
2157 * On DVB-C Annex A and C, the bandwidth is a function of
2158 * the roll-off and symbol rate. Annex B defines different
2159 * roll-off factors depending on the modulation. Fortunately,
2160 * Annex B is only used with 6MHz, so there's no need to
2163 * While not officially supported, a side effect of handling it at
2164 * the cache level is that a program could retrieve the bandwidth
2165 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2167 switch (c->delivery_system) {
2169 case SYS_DVBC_ANNEX_B:
2170 c->bandwidth_hz = 6000000;
2172 case SYS_DVBC_ANNEX_A:
2175 case SYS_DVBC_ANNEX_C:
2184 switch (c->rolloff) {
2200 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2202 /* force auto frequency inversion if requested */
2203 if (dvb_force_auto_inversion)
2204 c->inversion = INVERSION_AUTO;
2207 * without hierarchical coding code_rate_LP is irrelevant,
2208 * so we tolerate the otherwise invalid FEC_NONE setting
2210 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2211 c->code_rate_LP = FEC_AUTO;
2213 /* get frontend-specific tuning settings */
2214 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2215 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2216 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2217 fepriv->max_drift = fetunesettings.max_drift;
2218 fepriv->step_size = fetunesettings.step_size;
2220 /* default values */
2221 switch (c->delivery_system) {
2226 case SYS_DVBC_ANNEX_A:
2227 case SYS_DVBC_ANNEX_C:
2228 fepriv->min_delay = HZ / 20;
2229 fepriv->step_size = c->symbol_rate / 16000;
2230 fepriv->max_drift = c->symbol_rate / 2000;
2236 fepriv->min_delay = HZ / 20;
2237 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2238 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2242 * FIXME: This sounds wrong! if freqency_stepsize is
2243 * defined by the frontend, why not use it???
2245 fepriv->min_delay = HZ / 20;
2246 fepriv->step_size = 0; /* no zigzag */
2247 fepriv->max_drift = 0;
2251 if (dvb_override_tune_delay > 0)
2252 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2254 fepriv->state = FESTATE_RETUNE;
2256 /* Request the search algorithm to search */
2257 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2259 dvb_frontend_clear_events(fe);
2260 dvb_frontend_add_event(fe, 0);
2261 dvb_frontend_wakeup(fe);
2268 static int dvb_frontend_ioctl_legacy(struct file *file,
2269 unsigned int cmd, void *parg)
2271 struct dvb_device *dvbdev = file->private_data;
2272 struct dvb_frontend *fe = dvbdev->priv;
2273 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2274 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2275 int err = -EOPNOTSUPP;
2279 struct dvb_frontend_info* info = parg;
2281 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2282 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2285 * Associate the 4 delivery systems supported by DVBv3
2286 * API with their DVBv5 counterpart. For the other standards,
2287 * use the closest type, assuming that it would hopefully
2288 * work with a DVBv3 application.
2289 * It should be noticed that, on multi-frontend devices with
2290 * different types (terrestrial and cable, for example),
2291 * a pure DVBv3 application won't be able to use all delivery
2292 * systems. Yet, changing the DVBv5 cache to the other delivery
2293 * system should be enough for making it work.
2295 switch (dvbv3_type(c->delivery_system)) {
2297 info->type = FE_QPSK;
2300 info->type = FE_ATSC;
2303 info->type = FE_QAM;
2306 info->type = FE_OFDM;
2309 dev_err(fe->dvb->device,
2310 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2311 __func__, c->delivery_system);
2312 fe->ops.info.type = FE_OFDM;
2314 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2315 __func__, c->delivery_system, fe->ops.info.type);
2317 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2318 * do it, it is done for it. */
2319 info->caps |= FE_CAN_INVERSION_AUTO;
2324 case FE_READ_STATUS: {
2325 enum fe_status *status = parg;
2327 /* if retune was requested but hasn't occurred yet, prevent
2328 * that user get signal state from previous tuning */
2329 if (fepriv->state == FESTATE_RETUNE ||
2330 fepriv->state == FESTATE_ERROR) {
2336 if (fe->ops.read_status)
2337 err = fe->ops.read_status(fe, status);
2342 if (fe->ops.read_ber) {
2344 err = fe->ops.read_ber(fe, (__u32 *) parg);
2350 case FE_READ_SIGNAL_STRENGTH:
2351 if (fe->ops.read_signal_strength) {
2353 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2360 if (fe->ops.read_snr) {
2362 err = fe->ops.read_snr(fe, (__u16 *) parg);
2368 case FE_READ_UNCORRECTED_BLOCKS:
2369 if (fe->ops.read_ucblocks) {
2371 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2377 case FE_DISEQC_RESET_OVERLOAD:
2378 if (fe->ops.diseqc_reset_overload) {
2379 err = fe->ops.diseqc_reset_overload(fe);
2380 fepriv->state = FESTATE_DISEQC;
2385 case FE_DISEQC_SEND_MASTER_CMD:
2386 if (fe->ops.diseqc_send_master_cmd) {
2387 struct dvb_diseqc_master_cmd *cmd = parg;
2389 if (cmd->msg_len > sizeof(cmd->msg)) {
2393 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2394 fepriv->state = FESTATE_DISEQC;
2399 case FE_DISEQC_SEND_BURST:
2400 if (fe->ops.diseqc_send_burst) {
2401 err = fe->ops.diseqc_send_burst(fe,
2402 (enum fe_sec_mini_cmd)parg);
2403 fepriv->state = FESTATE_DISEQC;
2409 if (fe->ops.set_tone) {
2410 err = fe->ops.set_tone(fe,
2411 (enum fe_sec_tone_mode)parg);
2412 fepriv->tone = (enum fe_sec_tone_mode)parg;
2413 fepriv->state = FESTATE_DISEQC;
2418 case FE_SET_VOLTAGE:
2419 if (fe->ops.set_voltage) {
2420 err = fe->ops.set_voltage(fe,
2421 (enum fe_sec_voltage)parg);
2422 fepriv->voltage = (enum fe_sec_voltage)parg;
2423 fepriv->state = FESTATE_DISEQC;
2428 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2429 if (fe->ops.dishnetwork_send_legacy_command) {
2430 err = fe->ops.dishnetwork_send_legacy_command(fe,
2431 (unsigned long)parg);
2432 fepriv->state = FESTATE_DISEQC;
2434 } else if (fe->ops.set_voltage) {
2436 * NOTE: This is a fallback condition. Some frontends
2437 * (stv0299 for instance) take longer than 8msec to
2438 * respond to a set_voltage command. Those switches
2439 * need custom routines to switch properly. For all
2440 * other frontends, the following should work ok.
2441 * Dish network legacy switches (as used by Dish500)
2442 * are controlled by sending 9-bit command words
2443 * spaced 8msec apart.
2444 * the actual command word is switch/port dependent
2445 * so it is up to the userspace application to send
2446 * the right command.
2447 * The command must always start with a '0' after
2448 * initialization, so parg is 8 bits and does not
2449 * include the initialization or start bit
2451 unsigned long swcmd = ((unsigned long) parg) << 1;
2456 if (dvb_frontend_debug)
2457 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2458 nexttime = ktime_get_real();
2459 if (dvb_frontend_debug)
2461 /* before sending a command, initialize by sending
2462 * a 32ms 18V to the switch
2464 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2465 dvb_frontend_sleep_until(&nexttime, 32000);
2467 for (i = 0; i < 9; i++) {
2468 if (dvb_frontend_debug)
2469 tv[i+1] = ktime_get_real();
2470 if ((swcmd & 0x01) != last) {
2471 /* set voltage to (last ? 13V : 18V) */
2472 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2473 last = (last) ? 0 : 1;
2477 dvb_frontend_sleep_until(&nexttime, 8000);
2479 if (dvb_frontend_debug) {
2480 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2481 __func__, fe->dvb->num);
2482 for (i = 1; i < 10; i++)
2483 printk("%d: %d\n", i,
2484 (int) ktime_us_delta(tv[i], tv[i-1]));
2487 fepriv->state = FESTATE_DISEQC;
2492 case FE_DISEQC_RECV_SLAVE_REPLY:
2493 if (fe->ops.diseqc_recv_slave_reply)
2494 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2497 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2498 if (fe->ops.enable_high_lnb_voltage)
2499 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2502 case FE_SET_FRONTEND:
2503 err = dvbv3_set_delivery_system(fe);
2507 err = dtv_property_cache_sync(fe, c, parg);
2510 err = dtv_set_frontend(fe);
2513 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2516 case FE_GET_FRONTEND:
2517 err = dtv_get_frontend(fe, parg);
2520 case FE_SET_FRONTEND_TUNE_MODE:
2521 fepriv->tune_mode_flags = (unsigned long) parg;
2530 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2532 struct dvb_device *dvbdev = file->private_data;
2533 struct dvb_frontend *fe = dvbdev->priv;
2534 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2536 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2538 poll_wait (file, &fepriv->events.wait_queue, wait);
2540 if (fepriv->events.eventw != fepriv->events.eventr)
2541 return (POLLIN | POLLRDNORM | POLLPRI);
2546 static int dvb_frontend_open(struct inode *inode, struct file *file)
2548 struct dvb_device *dvbdev = file->private_data;
2549 struct dvb_frontend *fe = dvbdev->priv;
2550 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2551 struct dvb_adapter *adapter = fe->dvb;
2554 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2555 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2558 if (adapter->mfe_shared) {
2559 mutex_lock (&adapter->mfe_lock);
2561 if (adapter->mfe_dvbdev == NULL)
2562 adapter->mfe_dvbdev = dvbdev;
2564 else if (adapter->mfe_dvbdev != dvbdev) {
2566 *mfedev = adapter->mfe_dvbdev;
2568 *mfe = mfedev->priv;
2569 struct dvb_frontend_private
2570 *mfepriv = mfe->frontend_priv;
2571 int mferetry = (dvb_mfe_wait_time << 1);
2573 mutex_unlock (&adapter->mfe_lock);
2574 while (mferetry-- && (mfedev->users != -1 ||
2575 mfepriv->thread != NULL)) {
2576 if(msleep_interruptible(500)) {
2577 if(signal_pending(current))
2582 mutex_lock (&adapter->mfe_lock);
2583 if(adapter->mfe_dvbdev != dvbdev) {
2584 mfedev = adapter->mfe_dvbdev;
2586 mfepriv = mfe->frontend_priv;
2587 if (mfedev->users != -1 ||
2588 mfepriv->thread != NULL) {
2589 mutex_unlock (&adapter->mfe_lock);
2592 adapter->mfe_dvbdev = dvbdev;
2597 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2598 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2601 /* If we took control of the bus, we need to force
2602 reinitialization. This is because many ts_bus_ctrl()
2603 functions strobe the RESET pin on the demod, and if the
2604 frontend thread already exists then the dvb_init() routine
2605 won't get called (which is what usually does initial
2606 register configuration). */
2607 fepriv->reinitialise = 1;
2610 if ((ret = dvb_generic_open (inode, file)) < 0)
2613 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2614 /* normal tune mode when opened R/W */
2615 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2617 fepriv->voltage = -1;
2619 ret = dvb_frontend_start (fe);
2623 /* empty event queue */
2624 fepriv->events.eventr = fepriv->events.eventw = 0;
2627 if (adapter->mfe_shared)
2628 mutex_unlock (&adapter->mfe_lock);
2632 dvb_generic_release(inode, file);
2634 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2635 fe->ops.ts_bus_ctrl(fe, 0);
2637 if (adapter->mfe_shared)
2638 mutex_unlock (&adapter->mfe_lock);
2642 static int dvb_frontend_release(struct inode *inode, struct file *file)
2644 struct dvb_device *dvbdev = file->private_data;
2645 struct dvb_frontend *fe = dvbdev->priv;
2646 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2649 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2651 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2652 fepriv->release_jiffies = jiffies;
2656 ret = dvb_generic_release (inode, file);
2658 if (dvbdev->users == -1) {
2659 wake_up(&fepriv->wait_queue);
2660 if (fe->exit != DVB_FE_NO_EXIT)
2661 wake_up(&dvbdev->wait_queue);
2662 if (fe->ops.ts_bus_ctrl)
2663 fe->ops.ts_bus_ctrl(fe, 0);
2669 static const struct file_operations dvb_frontend_fops = {
2670 .owner = THIS_MODULE,
2671 .unlocked_ioctl = dvb_generic_ioctl,
2672 .poll = dvb_frontend_poll,
2673 .open = dvb_frontend_open,
2674 .release = dvb_frontend_release,
2675 .llseek = noop_llseek,
2678 int dvb_frontend_suspend(struct dvb_frontend *fe)
2682 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2685 if (fe->ops.tuner_ops.suspend)
2686 ret = fe->ops.tuner_ops.suspend(fe);
2687 else if (fe->ops.tuner_ops.sleep)
2688 ret = fe->ops.tuner_ops.sleep(fe);
2691 ret = fe->ops.sleep(fe);
2695 EXPORT_SYMBOL(dvb_frontend_suspend);
2697 int dvb_frontend_resume(struct dvb_frontend *fe)
2699 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2702 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2705 fe->exit = DVB_FE_DEVICE_RESUME;
2707 ret = fe->ops.init(fe);
2709 if (fe->ops.tuner_ops.resume)
2710 ret = fe->ops.tuner_ops.resume(fe);
2711 else if (fe->ops.tuner_ops.init)
2712 ret = fe->ops.tuner_ops.init(fe);
2714 fe->exit = DVB_FE_NO_EXIT;
2715 fepriv->state = FESTATE_RETUNE;
2716 dvb_frontend_wakeup(fe);
2720 EXPORT_SYMBOL(dvb_frontend_resume);
2722 int dvb_register_frontend(struct dvb_adapter* dvb,
2723 struct dvb_frontend* fe)
2725 struct dvb_frontend_private *fepriv;
2726 const struct dvb_device dvbdev_template = {
2730 .fops = &dvb_frontend_fops,
2731 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2732 .name = fe->ops.info.name,
2734 .kernel_ioctl = dvb_frontend_ioctl
2737 dev_dbg(dvb->device, "%s:\n", __func__);
2739 if (mutex_lock_interruptible(&frontend_mutex))
2740 return -ERESTARTSYS;
2742 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2743 if (fe->frontend_priv == NULL) {
2744 mutex_unlock(&frontend_mutex);
2747 fepriv = fe->frontend_priv;
2749 sema_init(&fepriv->sem, 1);
2750 init_waitqueue_head (&fepriv->wait_queue);
2751 init_waitqueue_head (&fepriv->events.wait_queue);
2752 mutex_init(&fepriv->events.mtx);
2754 fepriv->inversion = INVERSION_OFF;
2756 dev_info(fe->dvb->device,
2757 "DVB: registering adapter %i frontend %i (%s)...\n",
2758 fe->dvb->num, fe->id, fe->ops.info.name);
2760 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2761 fe, DVB_DEVICE_FRONTEND);
2764 * Initialize the cache to the proper values according with the
2765 * first supported delivery system (ops->delsys[0])
2768 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2769 dvb_frontend_clear_cache(fe);
2771 mutex_unlock(&frontend_mutex);
2774 EXPORT_SYMBOL(dvb_register_frontend);
2776 int dvb_unregister_frontend(struct dvb_frontend* fe)
2778 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2779 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2781 mutex_lock(&frontend_mutex);
2782 dvb_frontend_stop (fe);
2783 mutex_unlock(&frontend_mutex);
2785 if (fepriv->dvbdev->users < -1)
2786 wait_event(fepriv->dvbdev->wait_queue,
2787 fepriv->dvbdev->users==-1);
2789 mutex_lock(&frontend_mutex);
2790 dvb_unregister_device (fepriv->dvbdev);
2792 /* fe is invalid now */
2794 mutex_unlock(&frontend_mutex);
2797 EXPORT_SYMBOL(dvb_unregister_frontend);
2799 #ifdef CONFIG_MEDIA_ATTACH
2800 void dvb_frontend_detach(struct dvb_frontend* fe)
2804 if (fe->ops.release_sec) {
2805 fe->ops.release_sec(fe);
2806 dvb_detach(fe->ops.release_sec);
2808 if (fe->ops.tuner_ops.release) {
2809 fe->ops.tuner_ops.release(fe);
2810 dvb_detach(fe->ops.tuner_ops.release);
2812 if (fe->ops.analog_ops.release) {
2813 fe->ops.analog_ops.release(fe);
2814 dvb_detach(fe->ops.analog_ops.release);
2816 ptr = (void*)fe->ops.release;
2818 fe->ops.release(fe);
2823 void dvb_frontend_detach(struct dvb_frontend* fe)
2825 if (fe->ops.release_sec)
2826 fe->ops.release_sec(fe);
2827 if (fe->ops.tuner_ops.release)
2828 fe->ops.tuner_ops.release(fe);
2829 if (fe->ops.analog_ops.release)
2830 fe->ops.analog_ops.release(fe);
2831 if (fe->ops.release)
2832 fe->ops.release(fe);
2835 EXPORT_SYMBOL(dvb_frontend_detach);