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)
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;
113 enum fe_status status;
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;
135 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
136 struct media_pipeline pipe;
137 struct media_entity *pipe_start_entity;
141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
142 static int dtv_get_frontend(struct dvb_frontend *fe,
143 struct dvb_frontend_parameters *p_out);
144 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
145 struct dvb_frontend_parameters *p);
147 static bool has_get_frontend(struct dvb_frontend *fe)
149 return fe->ops.get_frontend != NULL;
153 * Due to DVBv3 API calls, a delivery system should be mapped into one of
154 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
155 * otherwise, a DVBv3 call will fail.
157 enum dvbv3_emulation_type {
165 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
167 switch (delivery_system) {
168 case SYS_DVBC_ANNEX_A:
169 case SYS_DVBC_ANNEX_C:
184 case SYS_DVBC_ANNEX_B:
192 * Doesn't know how to emulate those types and/or
193 * there's no frontend driver from this type yet
194 * with some emulation code, so, we're not sure yet how
195 * to handle them, or they're not compatible with a DVBv3 call.
197 return DVBV3_UNKNOWN;
201 static void dvb_frontend_add_event(struct dvb_frontend *fe,
202 enum fe_status status)
204 struct dvb_frontend_private *fepriv = fe->frontend_priv;
205 struct dvb_fe_events *events = &fepriv->events;
206 struct dvb_frontend_event *e;
209 dev_dbg(fe->dvb->device, "%s:\n", __func__);
211 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
212 dtv_get_frontend(fe, &fepriv->parameters_out);
214 mutex_lock(&events->mtx);
216 wp = (events->eventw + 1) % MAX_EVENT;
217 if (wp == events->eventr) {
218 events->overflow = 1;
219 events->eventr = (events->eventr + 1) % MAX_EVENT;
222 e = &events->events[events->eventw];
224 e->parameters = fepriv->parameters_out;
228 mutex_unlock(&events->mtx);
230 wake_up_interruptible (&events->wait_queue);
233 static int dvb_frontend_get_event(struct dvb_frontend *fe,
234 struct dvb_frontend_event *event, int flags)
236 struct dvb_frontend_private *fepriv = fe->frontend_priv;
237 struct dvb_fe_events *events = &fepriv->events;
239 dev_dbg(fe->dvb->device, "%s:\n", __func__);
241 if (events->overflow) {
242 events->overflow = 0;
246 if (events->eventw == events->eventr) {
249 if (flags & O_NONBLOCK)
254 ret = wait_event_interruptible (events->wait_queue,
255 events->eventw != events->eventr);
257 if (down_interruptible (&fepriv->sem))
264 mutex_lock(&events->mtx);
265 *event = events->events[events->eventr];
266 events->eventr = (events->eventr + 1) % MAX_EVENT;
267 mutex_unlock(&events->mtx);
272 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
274 struct dvb_frontend_private *fepriv = fe->frontend_priv;
275 struct dvb_fe_events *events = &fepriv->events;
277 mutex_lock(&events->mtx);
278 events->eventr = events->eventw;
279 mutex_unlock(&events->mtx);
282 static void dvb_frontend_init(struct dvb_frontend *fe)
284 dev_dbg(fe->dvb->device,
285 "%s: initialising adapter %i frontend %i (%s)...\n",
286 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
290 if (fe->ops.tuner_ops.init) {
291 if (fe->ops.i2c_gate_ctrl)
292 fe->ops.i2c_gate_ctrl(fe, 1);
293 fe->ops.tuner_ops.init(fe);
294 if (fe->ops.i2c_gate_ctrl)
295 fe->ops.i2c_gate_ctrl(fe, 0);
299 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
301 struct dvb_frontend_private *fepriv = fe->frontend_priv;
303 fepriv->reinitialise = 1;
304 dvb_frontend_wakeup(fe);
306 EXPORT_SYMBOL(dvb_frontend_reinitialise);
308 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
311 struct dvb_frontend *fe = fepriv->dvbdev->priv;
313 dev_dbg(fe->dvb->device, "%s:\n", __func__);
316 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
318 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
320 q2 = fepriv->quality - 128;
323 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
327 * Performs automatic twiddling of frontend parameters.
329 * @param fe The frontend concerned.
330 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
331 * @returns Number of complete iterations that have been performed.
333 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
338 struct dvb_frontend_private *fepriv = fe->frontend_priv;
339 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
340 int original_inversion = c->inversion;
341 u32 original_frequency = c->frequency;
343 /* are we using autoinversion? */
344 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
345 (c->inversion == INVERSION_AUTO));
347 /* setup parameters correctly */
349 /* calculate the lnb_drift */
350 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
352 /* wrap the auto_step if we've exceeded the maximum drift */
353 if (fepriv->lnb_drift > fepriv->max_drift) {
354 fepriv->auto_step = 0;
355 fepriv->auto_sub_step = 0;
356 fepriv->lnb_drift = 0;
359 /* perform inversion and +/- zigzag */
360 switch(fepriv->auto_sub_step) {
362 /* try with the current inversion and current drift setting */
367 if (!autoinversion) break;
369 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
374 if (fepriv->lnb_drift == 0) break;
376 fepriv->lnb_drift = -fepriv->lnb_drift;
381 if (fepriv->lnb_drift == 0) break;
382 if (!autoinversion) break;
384 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
385 fepriv->lnb_drift = -fepriv->lnb_drift;
391 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
395 if (!ready) fepriv->auto_sub_step++;
398 /* if this attempt would hit where we started, indicate a complete
399 * iteration has occurred */
400 if ((fepriv->auto_step == fepriv->started_auto_step) &&
401 (fepriv->auto_sub_step == 0) && check_wrapped) {
405 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
406 "auto_sub_step:%i started_auto_step:%i\n",
407 __func__, fepriv->lnb_drift, fepriv->inversion,
408 fepriv->auto_step, fepriv->auto_sub_step,
409 fepriv->started_auto_step);
411 /* set the frontend itself */
412 c->frequency += fepriv->lnb_drift;
414 c->inversion = fepriv->inversion;
416 if (fe->ops.set_frontend)
417 fe_set_err = fe->ops.set_frontend(fe);
419 if (fe_set_err < 0) {
420 fepriv->state = FESTATE_ERROR;
424 c->frequency = original_frequency;
425 c->inversion = original_inversion;
427 fepriv->auto_sub_step++;
431 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
433 enum fe_status s = 0;
435 struct dvb_frontend_private *fepriv = fe->frontend_priv;
436 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
438 /* if we've got no parameters, just keep idling */
439 if (fepriv->state & FESTATE_IDLE) {
440 fepriv->delay = 3*HZ;
445 /* in SCAN mode, we just set the frontend when asked and leave it alone */
446 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
447 if (fepriv->state & FESTATE_RETUNE) {
449 if (fe->ops.set_frontend)
450 retval = fe->ops.set_frontend(fe);
453 fepriv->state = FESTATE_ERROR;
455 fepriv->state = FESTATE_TUNED;
457 fepriv->delay = 3*HZ;
462 /* get the frontend status */
463 if (fepriv->state & FESTATE_RETUNE) {
466 if (fe->ops.read_status)
467 fe->ops.read_status(fe, &s);
468 if (s != fepriv->status) {
469 dvb_frontend_add_event(fe, s);
474 /* if we're not tuned, and we have a lock, move to the TUNED state */
475 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
476 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
477 fepriv->state = FESTATE_TUNED;
479 /* if we're tuned, then we have determined the correct inversion */
480 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
481 (c->inversion == INVERSION_AUTO)) {
482 c->inversion = fepriv->inversion;
487 /* if we are tuned already, check we're still locked */
488 if (fepriv->state & FESTATE_TUNED) {
489 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
491 /* we're tuned, and the lock is still good... */
492 if (s & FE_HAS_LOCK) {
494 } else { /* if we _WERE_ tuned, but now don't have a lock */
495 fepriv->state = FESTATE_ZIGZAG_FAST;
496 fepriv->started_auto_step = fepriv->auto_step;
497 fepriv->check_wrapped = 0;
501 /* don't actually do anything if we're in the LOSTLOCK state,
502 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
503 if ((fepriv->state & FESTATE_LOSTLOCK) &&
504 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
505 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
509 /* don't do anything if we're in the DISEQC state, since this
510 * might be someone with a motorized dish controlled by DISEQC.
511 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
512 if (fepriv->state & FESTATE_DISEQC) {
513 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
517 /* if we're in the RETUNE state, set everything up for a brand
518 * new scan, keeping the current inversion setting, as the next
519 * tune is _very_ likely to require the same */
520 if (fepriv->state & FESTATE_RETUNE) {
521 fepriv->lnb_drift = 0;
522 fepriv->auto_step = 0;
523 fepriv->auto_sub_step = 0;
524 fepriv->started_auto_step = 0;
525 fepriv->check_wrapped = 0;
529 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
530 fepriv->delay = fepriv->min_delay;
533 retval = dvb_frontend_swzigzag_autotune(fe,
534 fepriv->check_wrapped);
538 /* OK, if we've run out of trials at the fast speed.
539 * Drop back to slow for the _next_ attempt */
540 fepriv->state = FESTATE_SEARCHING_SLOW;
541 fepriv->started_auto_step = fepriv->auto_step;
544 fepriv->check_wrapped = 1;
546 /* if we've just retuned, enter the ZIGZAG_FAST state.
547 * This ensures we cannot return from an
548 * FE_SET_FRONTEND ioctl before the first frontend tune
550 if (fepriv->state & FESTATE_RETUNE) {
551 fepriv->state = FESTATE_TUNING_FAST;
556 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
557 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
559 /* Note: don't bother checking for wrapping; we stay in this
560 * state until we get a lock */
561 dvb_frontend_swzigzag_autotune(fe, 0);
565 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
567 struct dvb_frontend_private *fepriv = fe->frontend_priv;
569 if (fe->exit != DVB_FE_NO_EXIT)
572 if (fepriv->dvbdev->writers == 1)
573 if (time_after_eq(jiffies, fepriv->release_jiffies +
574 dvb_shutdown_timeout * HZ))
580 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
582 struct dvb_frontend_private *fepriv = fe->frontend_priv;
584 if (fepriv->wakeup) {
588 return dvb_frontend_is_exiting(fe);
591 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
593 struct dvb_frontend_private *fepriv = fe->frontend_priv;
596 wake_up_interruptible(&fepriv->wait_queue);
600 * dvb_enable_media_tuner() - tries to enable the DVB tuner
602 * @fe: struct dvb_frontend pointer
604 * This function ensures that just one media tuner is enabled for a given
605 * frontend. It has two different behaviors:
606 * - For trivial devices with just one tuner:
607 * it just enables the existing tuner->fe link
608 * - For devices with more than one tuner:
609 * It is up to the driver to implement the logic that will enable one tuner
610 * and disable the other ones. However, if more than one tuner is enabled for
611 * the same frontend, it will print an error message and return -EINVAL.
613 * At return, it will return the error code returned by media_entity_setup_link,
614 * or 0 if everything is OK, if no tuner is linked to the frontend or if the
617 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
618 static int dvb_enable_media_tuner(struct dvb_frontend *fe)
620 struct dvb_frontend_private *fepriv = fe->frontend_priv;
621 struct dvb_adapter *adapter = fe->dvb;
622 struct media_device *mdev = adapter->mdev;
623 struct media_entity *entity, *source;
624 struct media_link *link, *found_link = NULL;
625 int ret, n_links = 0, active_links = 0;
627 fepriv->pipe_start_entity = NULL;
632 entity = fepriv->dvbdev->entity;
633 fepriv->pipe_start_entity = entity;
635 list_for_each_entry(link, &entity->links, list) {
636 if (link->sink->entity == entity) {
639 if (link->flags & MEDIA_LNK_FL_ENABLED)
644 if (!n_links || active_links == 1 || !found_link)
648 * If a frontend has more than one tuner linked, it is up to the driver
649 * to select with one will be the active one, as the frontend core can't
650 * guess. If the driver doesn't do that, it is a bug.
652 if (n_links > 1 && active_links != 1) {
653 dev_err(fe->dvb->device,
654 "WARNING: there are %d active links among %d tuners. This is a driver's bug!\n",
655 active_links, n_links);
659 source = found_link->source->entity;
660 fepriv->pipe_start_entity = source;
661 list_for_each_entry(link, &source->links, list) {
662 struct media_entity *sink;
665 sink = link->sink->entity;
667 flags = MEDIA_LNK_FL_ENABLED;
669 ret = media_entity_setup_link(link, flags);
671 dev_err(fe->dvb->device,
672 "Couldn't change link %s->%s to %s. Error %d\n",
673 source->name, sink->name,
674 flags ? "enabled" : "disabled",
678 dev_dbg(fe->dvb->device,
679 "link %s->%s was %s\n",
680 source->name, sink->name,
681 flags ? "ENABLED" : "disabled");
687 static int dvb_frontend_thread(void *data)
689 struct dvb_frontend *fe = data;
690 struct dvb_frontend_private *fepriv = fe->frontend_priv;
692 enum dvbfe_algo algo;
693 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
697 bool re_tune = false;
698 bool semheld = false;
700 dev_dbg(fe->dvb->device, "%s:\n", __func__);
702 fepriv->check_wrapped = 0;
704 fepriv->delay = 3*HZ;
707 fepriv->reinitialise = 0;
709 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
710 ret = dvb_enable_media_tuner(fe);
712 /* FIXME: return an error if it fails */
713 dev_info(fe->dvb->device,
714 "proceeding with FE task\n");
715 } else if (fepriv->pipe_start_entity) {
716 ret = media_entity_pipeline_start(fepriv->pipe_start_entity,
723 dvb_frontend_init(fe);
727 up(&fepriv->sem); /* is locked when we enter the thread... */
729 wait_event_interruptible_timeout(fepriv->wait_queue,
730 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
731 || freezing(current),
734 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
735 /* got signal or quitting */
736 if (!down_interruptible(&fepriv->sem))
738 fe->exit = DVB_FE_NORMAL_EXIT;
745 if (down_interruptible(&fepriv->sem))
748 if (fepriv->reinitialise) {
749 dvb_frontend_init(fe);
750 if (fe->ops.set_tone && fepriv->tone != -1)
751 fe->ops.set_tone(fe, fepriv->tone);
752 if (fe->ops.set_voltage && fepriv->voltage != -1)
753 fe->ops.set_voltage(fe, fepriv->voltage);
754 fepriv->reinitialise = 0;
757 /* do an iteration of the tuning loop */
758 if (fe->ops.get_frontend_algo) {
759 algo = fe->ops.get_frontend_algo(fe);
762 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
764 if (fepriv->state & FESTATE_RETUNE) {
765 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
767 fepriv->state = FESTATE_TUNED;
773 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
775 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
776 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
777 dvb_frontend_add_event(fe, s);
782 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
783 dvb_frontend_swzigzag(fe);
785 case DVBFE_ALGO_CUSTOM:
786 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
787 if (fepriv->state & FESTATE_RETUNE) {
788 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
789 fepriv->state = FESTATE_TUNED;
791 /* Case where we are going to search for a carrier
792 * User asked us to retune again for some reason, possibly
793 * requesting a search with a new set of parameters
795 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
796 if (fe->ops.search) {
797 fepriv->algo_status = fe->ops.search(fe);
798 /* We did do a search as was requested, the flags are
799 * now unset as well and has the flags wrt to search.
802 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
805 /* Track the carrier if the search was successful */
806 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
807 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
808 fepriv->delay = HZ / 2;
810 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
811 fe->ops.read_status(fe, &s);
812 if (s != fepriv->status) {
813 dvb_frontend_add_event(fe, s); /* update event list */
815 if (!(s & FE_HAS_LOCK)) {
816 fepriv->delay = HZ / 10;
817 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
819 fepriv->delay = 60 * HZ;
824 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
828 dvb_frontend_swzigzag(fe);
832 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
833 if (fepriv->pipe_start_entity)
834 media_entity_pipeline_stop(fepriv->pipe_start_entity);
835 fepriv->pipe_start_entity = NULL;
838 if (dvb_powerdown_on_sleep) {
839 if (fe->ops.set_voltage)
840 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
841 if (fe->ops.tuner_ops.sleep) {
842 if (fe->ops.i2c_gate_ctrl)
843 fe->ops.i2c_gate_ctrl(fe, 1);
844 fe->ops.tuner_ops.sleep(fe);
845 if (fe->ops.i2c_gate_ctrl)
846 fe->ops.i2c_gate_ctrl(fe, 0);
852 fepriv->thread = NULL;
853 if (kthread_should_stop())
854 fe->exit = DVB_FE_DEVICE_REMOVED;
856 fe->exit = DVB_FE_NO_EXIT;
861 dvb_frontend_wakeup(fe);
865 static void dvb_frontend_stop(struct dvb_frontend *fe)
867 struct dvb_frontend_private *fepriv = fe->frontend_priv;
869 dev_dbg(fe->dvb->device, "%s:\n", __func__);
871 if (fe->exit != DVB_FE_DEVICE_REMOVED)
872 fe->exit = DVB_FE_NORMAL_EXIT;
878 kthread_stop(fepriv->thread);
880 sema_init(&fepriv->sem, 1);
881 fepriv->state = FESTATE_IDLE;
883 /* paranoia check in case a signal arrived */
885 dev_warn(fe->dvb->device,
886 "dvb_frontend_stop: warning: thread %p won't exit\n",
891 * Sleep for the amount of time given by add_usec parameter
893 * This needs to be as precise as possible, as it affects the detection of
894 * the dish tone command at the satellite subsystem. The precision is improved
895 * by using a scheduled msleep followed by udelay for the remainder.
897 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
901 *waketime = ktime_add_us(*waketime, add_usec);
902 delta = ktime_us_delta(ktime_get_real(), *waketime);
904 msleep((delta - 1500) / 1000);
905 delta = ktime_us_delta(ktime_get_real(), *waketime);
910 EXPORT_SYMBOL(dvb_frontend_sleep_until);
912 static int dvb_frontend_start(struct dvb_frontend *fe)
915 struct dvb_frontend_private *fepriv = fe->frontend_priv;
916 struct task_struct *fe_thread;
918 dev_dbg(fe->dvb->device, "%s:\n", __func__);
920 if (fepriv->thread) {
921 if (fe->exit == DVB_FE_NO_EXIT)
924 dvb_frontend_stop (fe);
927 if (signal_pending(current))
929 if (down_interruptible (&fepriv->sem))
932 fepriv->state = FESTATE_IDLE;
933 fe->exit = DVB_FE_NO_EXIT;
934 fepriv->thread = NULL;
937 fe_thread = kthread_run(dvb_frontend_thread, fe,
938 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
939 if (IS_ERR(fe_thread)) {
940 ret = PTR_ERR(fe_thread);
941 dev_warn(fe->dvb->device,
942 "dvb_frontend_start: failed to start kthread (%d)\n",
947 fepriv->thread = fe_thread;
951 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
952 u32 *freq_min, u32 *freq_max)
954 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
956 if (fe->ops.info.frequency_max == 0)
957 *freq_max = fe->ops.tuner_ops.info.frequency_max;
958 else if (fe->ops.tuner_ops.info.frequency_max == 0)
959 *freq_max = fe->ops.info.frequency_max;
961 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
963 if (*freq_min == 0 || *freq_max == 0)
964 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
965 fe->dvb->num, fe->id);
968 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
970 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
974 /* range check: frequency */
975 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
976 if ((freq_min && c->frequency < freq_min) ||
977 (freq_max && c->frequency > freq_max)) {
978 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
979 fe->dvb->num, fe->id, c->frequency,
984 /* range check: symbol rate */
985 switch (c->delivery_system) {
989 case SYS_DVBC_ANNEX_A:
990 case SYS_DVBC_ANNEX_C:
991 if ((fe->ops.info.symbol_rate_min &&
992 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
993 (fe->ops.info.symbol_rate_max &&
994 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
995 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
996 fe->dvb->num, fe->id, c->symbol_rate,
997 fe->ops.info.symbol_rate_min,
998 fe->ops.info.symbol_rate_max);
1008 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
1010 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1014 delsys = c->delivery_system;
1015 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
1016 c->delivery_system = delsys;
1018 c->state = DTV_CLEAR;
1020 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1021 __func__, c->delivery_system);
1023 c->transmission_mode = TRANSMISSION_MODE_AUTO;
1024 c->bandwidth_hz = 0; /* AUTO */
1025 c->guard_interval = GUARD_INTERVAL_AUTO;
1026 c->hierarchy = HIERARCHY_AUTO;
1028 c->code_rate_HP = FEC_AUTO;
1029 c->code_rate_LP = FEC_AUTO;
1030 c->fec_inner = FEC_AUTO;
1031 c->rolloff = ROLLOFF_AUTO;
1032 c->voltage = SEC_VOLTAGE_OFF;
1033 c->sectone = SEC_TONE_OFF;
1034 c->pilot = PILOT_AUTO;
1036 c->isdbt_partial_reception = 0;
1037 c->isdbt_sb_mode = 0;
1038 c->isdbt_sb_subchannel = 0;
1039 c->isdbt_sb_segment_idx = 0;
1040 c->isdbt_sb_segment_count = 0;
1041 c->isdbt_layer_enabled = 0;
1042 for (i = 0; i < 3; i++) {
1043 c->layer[i].fec = FEC_AUTO;
1044 c->layer[i].modulation = QAM_AUTO;
1045 c->layer[i].interleaving = 0;
1046 c->layer[i].segment_count = 0;
1049 c->stream_id = NO_STREAM_ID_FILTER;
1051 switch (c->delivery_system) {
1055 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1056 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1059 c->modulation = VSB_8;
1062 c->symbol_rate = 28860000;
1063 c->rolloff = ROLLOFF_35;
1064 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1067 c->modulation = QAM_AUTO;
1076 #define _DTV_CMD(n, s, b) \
1084 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1085 _DTV_CMD(DTV_TUNE, 1, 0),
1086 _DTV_CMD(DTV_CLEAR, 1, 0),
1089 _DTV_CMD(DTV_FREQUENCY, 1, 0),
1090 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1091 _DTV_CMD(DTV_MODULATION, 1, 0),
1092 _DTV_CMD(DTV_INVERSION, 1, 0),
1093 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1094 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1095 _DTV_CMD(DTV_INNER_FEC, 1, 0),
1096 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1097 _DTV_CMD(DTV_TONE, 1, 0),
1098 _DTV_CMD(DTV_PILOT, 1, 0),
1099 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1100 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1101 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1102 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1103 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1104 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1105 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1106 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1108 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1109 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1110 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1111 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1112 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1113 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1114 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1115 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1116 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1117 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1118 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1119 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1120 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1121 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1122 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1123 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1124 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1125 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1127 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1128 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1129 _DTV_CMD(DTV_LNA, 1, 0),
1132 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1133 _DTV_CMD(DTV_API_VERSION, 0, 0),
1135 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1137 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1138 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1140 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1141 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1142 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1143 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1144 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1145 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1146 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1147 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1148 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1149 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1150 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1151 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1152 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1154 /* Statistics API */
1155 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1156 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1157 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1158 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1159 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1160 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1161 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1162 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1165 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1169 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1170 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1171 __func__, tvp->cmd);
1175 dev_dbg(fe->dvb->device, "%s: tvp.cmd = 0x%08x (%s)\n", __func__,
1176 tvp->cmd, dtv_cmds[tvp->cmd].name);
1178 if (dtv_cmds[tvp->cmd].buffer) {
1179 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1180 __func__, tvp->u.buffer.len);
1182 for(i = 0; i < tvp->u.buffer.len; i++)
1183 dev_dbg(fe->dvb->device,
1184 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1185 __func__, i, tvp->u.buffer.data[i]);
1187 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1192 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1193 * drivers can use a single set_frontend tuning function, regardless of whether
1194 * it's being used for the legacy or new API, reducing code and complexity.
1196 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1197 struct dtv_frontend_properties *c,
1198 const struct dvb_frontend_parameters *p)
1200 c->frequency = p->frequency;
1201 c->inversion = p->inversion;
1203 switch (dvbv3_type(c->delivery_system)) {
1205 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1206 c->symbol_rate = p->u.qpsk.symbol_rate;
1207 c->fec_inner = p->u.qpsk.fec_inner;
1210 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1211 c->symbol_rate = p->u.qam.symbol_rate;
1212 c->fec_inner = p->u.qam.fec_inner;
1213 c->modulation = p->u.qam.modulation;
1216 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1218 switch (p->u.ofdm.bandwidth) {
1219 case BANDWIDTH_10_MHZ:
1220 c->bandwidth_hz = 10000000;
1222 case BANDWIDTH_8_MHZ:
1223 c->bandwidth_hz = 8000000;
1225 case BANDWIDTH_7_MHZ:
1226 c->bandwidth_hz = 7000000;
1228 case BANDWIDTH_6_MHZ:
1229 c->bandwidth_hz = 6000000;
1231 case BANDWIDTH_5_MHZ:
1232 c->bandwidth_hz = 5000000;
1234 case BANDWIDTH_1_712_MHZ:
1235 c->bandwidth_hz = 1712000;
1237 case BANDWIDTH_AUTO:
1238 c->bandwidth_hz = 0;
1241 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1242 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1243 c->modulation = p->u.ofdm.constellation;
1244 c->transmission_mode = p->u.ofdm.transmission_mode;
1245 c->guard_interval = p->u.ofdm.guard_interval;
1246 c->hierarchy = p->u.ofdm.hierarchy_information;
1249 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1250 c->modulation = p->u.vsb.modulation;
1251 if (c->delivery_system == SYS_ATSCMH)
1253 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1254 c->delivery_system = SYS_ATSC;
1256 c->delivery_system = SYS_DVBC_ANNEX_B;
1259 dev_err(fe->dvb->device,
1260 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1261 __func__, c->delivery_system);
1268 /* Ensure the cached values are set correctly in the frontend
1269 * legacy tuning structures, for the advanced tuning API.
1271 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1272 struct dvb_frontend_parameters *p)
1274 const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1276 p->frequency = c->frequency;
1277 p->inversion = c->inversion;
1279 switch (dvbv3_type(c->delivery_system)) {
1281 dev_err(fe->dvb->device,
1282 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1283 __func__, c->delivery_system);
1286 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1287 p->u.qpsk.symbol_rate = c->symbol_rate;
1288 p->u.qpsk.fec_inner = c->fec_inner;
1291 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1292 p->u.qam.symbol_rate = c->symbol_rate;
1293 p->u.qam.fec_inner = c->fec_inner;
1294 p->u.qam.modulation = c->modulation;
1297 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1298 switch (c->bandwidth_hz) {
1300 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1303 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1306 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1309 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1312 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1315 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1319 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1321 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1322 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1323 p->u.ofdm.constellation = c->modulation;
1324 p->u.ofdm.transmission_mode = c->transmission_mode;
1325 p->u.ofdm.guard_interval = c->guard_interval;
1326 p->u.ofdm.hierarchy_information = c->hierarchy;
1329 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1330 p->u.vsb.modulation = c->modulation;
1337 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1338 * @fe: struct dvb_frontend pointer
1339 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1340 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1342 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1343 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1344 * If p_out is not null, it will update the DVBv3 params pointed by it.
1346 static int dtv_get_frontend(struct dvb_frontend *fe,
1347 struct dvb_frontend_parameters *p_out)
1351 if (fe->ops.get_frontend) {
1352 r = fe->ops.get_frontend(fe);
1353 if (unlikely(r < 0))
1356 dtv_property_legacy_params_sync(fe, p_out);
1360 /* As everything is in cache, get_frontend fops are always supported */
1364 static int dvb_frontend_ioctl_legacy(struct file *file,
1365 unsigned int cmd, void *parg);
1366 static int dvb_frontend_ioctl_properties(struct file *file,
1367 unsigned int cmd, void *parg);
1369 static int dtv_property_process_get(struct dvb_frontend *fe,
1370 const struct dtv_frontend_properties *c,
1371 struct dtv_property *tvp,
1377 case DTV_ENUM_DELSYS:
1379 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1380 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1383 tvp->u.buffer.len = ncaps;
1386 tvp->u.data = c->frequency;
1388 case DTV_MODULATION:
1389 tvp->u.data = c->modulation;
1391 case DTV_BANDWIDTH_HZ:
1392 tvp->u.data = c->bandwidth_hz;
1395 tvp->u.data = c->inversion;
1397 case DTV_SYMBOL_RATE:
1398 tvp->u.data = c->symbol_rate;
1401 tvp->u.data = c->fec_inner;
1404 tvp->u.data = c->pilot;
1407 tvp->u.data = c->rolloff;
1409 case DTV_DELIVERY_SYSTEM:
1410 tvp->u.data = c->delivery_system;
1413 tvp->u.data = c->voltage;
1416 tvp->u.data = c->sectone;
1418 case DTV_API_VERSION:
1419 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1421 case DTV_CODE_RATE_HP:
1422 tvp->u.data = c->code_rate_HP;
1424 case DTV_CODE_RATE_LP:
1425 tvp->u.data = c->code_rate_LP;
1427 case DTV_GUARD_INTERVAL:
1428 tvp->u.data = c->guard_interval;
1430 case DTV_TRANSMISSION_MODE:
1431 tvp->u.data = c->transmission_mode;
1434 tvp->u.data = c->hierarchy;
1436 case DTV_INTERLEAVING:
1437 tvp->u.data = c->interleaving;
1440 /* ISDB-T Support here */
1441 case DTV_ISDBT_PARTIAL_RECEPTION:
1442 tvp->u.data = c->isdbt_partial_reception;
1444 case DTV_ISDBT_SOUND_BROADCASTING:
1445 tvp->u.data = c->isdbt_sb_mode;
1447 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1448 tvp->u.data = c->isdbt_sb_subchannel;
1450 case DTV_ISDBT_SB_SEGMENT_IDX:
1451 tvp->u.data = c->isdbt_sb_segment_idx;
1453 case DTV_ISDBT_SB_SEGMENT_COUNT:
1454 tvp->u.data = c->isdbt_sb_segment_count;
1456 case DTV_ISDBT_LAYER_ENABLED:
1457 tvp->u.data = c->isdbt_layer_enabled;
1459 case DTV_ISDBT_LAYERA_FEC:
1460 tvp->u.data = c->layer[0].fec;
1462 case DTV_ISDBT_LAYERA_MODULATION:
1463 tvp->u.data = c->layer[0].modulation;
1465 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1466 tvp->u.data = c->layer[0].segment_count;
1468 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1469 tvp->u.data = c->layer[0].interleaving;
1471 case DTV_ISDBT_LAYERB_FEC:
1472 tvp->u.data = c->layer[1].fec;
1474 case DTV_ISDBT_LAYERB_MODULATION:
1475 tvp->u.data = c->layer[1].modulation;
1477 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1478 tvp->u.data = c->layer[1].segment_count;
1480 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1481 tvp->u.data = c->layer[1].interleaving;
1483 case DTV_ISDBT_LAYERC_FEC:
1484 tvp->u.data = c->layer[2].fec;
1486 case DTV_ISDBT_LAYERC_MODULATION:
1487 tvp->u.data = c->layer[2].modulation;
1489 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1490 tvp->u.data = c->layer[2].segment_count;
1492 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1493 tvp->u.data = c->layer[2].interleaving;
1496 /* Multistream support */
1498 case DTV_DVBT2_PLP_ID_LEGACY:
1499 tvp->u.data = c->stream_id;
1503 case DTV_ATSCMH_FIC_VER:
1504 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1506 case DTV_ATSCMH_PARADE_ID:
1507 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1509 case DTV_ATSCMH_NOG:
1510 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1512 case DTV_ATSCMH_TNOG:
1513 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1515 case DTV_ATSCMH_SGN:
1516 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1518 case DTV_ATSCMH_PRC:
1519 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1521 case DTV_ATSCMH_RS_FRAME_MODE:
1522 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1524 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1525 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1527 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1528 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1530 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1531 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1533 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1534 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1536 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1537 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1539 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1540 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1542 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1543 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1545 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1546 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1550 tvp->u.data = c->lna;
1553 /* Fill quality measures */
1554 case DTV_STAT_SIGNAL_STRENGTH:
1555 tvp->u.st = c->strength;
1560 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1561 tvp->u.st = c->pre_bit_error;
1563 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1564 tvp->u.st = c->pre_bit_count;
1566 case DTV_STAT_POST_ERROR_BIT_COUNT:
1567 tvp->u.st = c->post_bit_error;
1569 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1570 tvp->u.st = c->post_bit_count;
1572 case DTV_STAT_ERROR_BLOCK_COUNT:
1573 tvp->u.st = c->block_error;
1575 case DTV_STAT_TOTAL_BLOCK_COUNT:
1576 tvp->u.st = c->block_count;
1579 dev_dbg(fe->dvb->device,
1580 "%s: FE property %d doesn't exist\n",
1581 __func__, tvp->cmd);
1585 /* Allow the frontend to override outgoing properties */
1586 if (fe->ops.get_property) {
1587 r = fe->ops.get_property(fe, tvp);
1592 dtv_property_dump(fe, tvp);
1597 static int dtv_set_frontend(struct dvb_frontend *fe);
1599 static bool is_dvbv3_delsys(u32 delsys)
1603 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1604 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1610 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1611 * @fe: struct frontend;
1612 * @delsys: DVBv5 type that will be used for emulation
1614 * Provides emulation for delivery systems that are compatible with the old
1615 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1616 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1617 * parameters are compatible with DVB-S spec.
1619 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1622 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1624 c->delivery_system = delsys;
1627 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1629 if (c->delivery_system == SYS_ISDBT) {
1630 dev_dbg(fe->dvb->device,
1631 "%s: Using defaults for SYS_ISDBT\n",
1634 if (!c->bandwidth_hz)
1635 c->bandwidth_hz = 6000000;
1637 c->isdbt_partial_reception = 0;
1638 c->isdbt_sb_mode = 0;
1639 c->isdbt_sb_subchannel = 0;
1640 c->isdbt_sb_segment_idx = 0;
1641 c->isdbt_sb_segment_count = 0;
1642 c->isdbt_layer_enabled = 7;
1643 for (i = 0; i < 3; i++) {
1644 c->layer[i].fec = FEC_AUTO;
1645 c->layer[i].modulation = QAM_AUTO;
1646 c->layer[i].interleaving = 0;
1647 c->layer[i].segment_count = 0;
1650 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1651 __func__, c->delivery_system);
1657 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1658 * @fe: frontend struct
1659 * @desired_system: delivery system requested by the user
1661 * A DVBv5 call know what's the desired system it wants. So, set it.
1663 * There are, however, a few known issues with early DVBv5 applications that
1664 * are also handled by this logic:
1666 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1667 * This is an API violation, but, as we don't want to break userspace,
1668 * convert it to the first supported delivery system.
1669 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1670 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1671 * ISDB-T provided backward compat with DVB-T.
1673 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1677 u32 delsys = SYS_UNDEFINED;
1678 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1679 enum dvbv3_emulation_type type;
1682 * It was reported that some old DVBv5 applications were
1683 * filling delivery_system with SYS_UNDEFINED. If this happens,
1684 * assume that the application wants to use the first supported
1687 if (desired_system == SYS_UNDEFINED)
1688 desired_system = fe->ops.delsys[0];
1691 * This is a DVBv5 call. So, it likely knows the supported
1692 * delivery systems. So, check if the desired delivery system is
1696 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1697 if (fe->ops.delsys[ncaps] == desired_system) {
1698 c->delivery_system = desired_system;
1699 dev_dbg(fe->dvb->device,
1700 "%s: Changing delivery system to %d\n",
1701 __func__, desired_system);
1708 * The requested delivery system isn't supported. Maybe userspace
1709 * is requesting a DVBv3 compatible delivery system.
1711 * The emulation only works if the desired system is one of the
1712 * delivery systems supported by DVBv3 API
1714 if (!is_dvbv3_delsys(desired_system)) {
1715 dev_dbg(fe->dvb->device,
1716 "%s: Delivery system %d not supported.\n",
1717 __func__, desired_system);
1721 type = dvbv3_type(desired_system);
1724 * Get the last non-DVBv3 delivery system that has the same type
1725 * of the desired system
1728 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1729 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1730 delsys = fe->ops.delsys[ncaps];
1734 /* There's nothing compatible with the desired delivery system */
1735 if (delsys == SYS_UNDEFINED) {
1736 dev_dbg(fe->dvb->device,
1737 "%s: Delivery system %d not supported on emulation mode.\n",
1738 __func__, desired_system);
1742 dev_dbg(fe->dvb->device,
1743 "%s: Using delivery system %d emulated as if it were %d\n",
1744 __func__, delsys, desired_system);
1746 return emulate_delivery_system(fe, desired_system);
1750 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1751 * @fe: frontend struct
1753 * A DVBv3 call doesn't know what's the desired system it wants. It also
1754 * doesn't allow to switch between different types. Due to that, userspace
1755 * should use DVBv5 instead.
1756 * However, in order to avoid breaking userspace API, limited backward
1757 * compatibility support is provided.
1759 * There are some delivery systems that are incompatible with DVBv3 calls.
1761 * This routine should work fine for frontends that support just one delivery
1764 * For frontends that support multiple frontends:
1765 * 1) It defaults to use the first supported delivery system. There's an
1766 * userspace application that allows changing it at runtime;
1768 * 2) If the current delivery system is not compatible with DVBv3, it gets
1769 * the first one that it is compatible.
1771 * NOTE: in order for this to work with applications like Kaffeine that
1772 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1773 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1774 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1777 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1780 u32 delsys = SYS_UNDEFINED;
1781 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1783 /* If not set yet, defaults to the first supported delivery system */
1784 if (c->delivery_system == SYS_UNDEFINED)
1785 c->delivery_system = fe->ops.delsys[0];
1788 * Trivial case: just use the current one, if it already a DVBv3
1791 if (is_dvbv3_delsys(c->delivery_system)) {
1792 dev_dbg(fe->dvb->device,
1793 "%s: Using delivery system to %d\n",
1794 __func__, c->delivery_system);
1799 * Seek for the first delivery system that it is compatible with a
1803 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1804 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1805 delsys = fe->ops.delsys[ncaps];
1810 if (delsys == SYS_UNDEFINED) {
1811 dev_dbg(fe->dvb->device,
1812 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1816 return emulate_delivery_system(fe, delsys);
1819 static int dtv_property_process_set(struct dvb_frontend *fe,
1820 struct dtv_property *tvp,
1824 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1826 /* Allow the frontend to validate incoming properties */
1827 if (fe->ops.set_property) {
1828 r = fe->ops.set_property(fe, tvp);
1836 * Reset a cache of data specific to the frontend here. This does
1837 * not effect hardware.
1839 dvb_frontend_clear_cache(fe);
1842 /* interpret the cache of data, build either a traditional frontend
1843 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1846 c->state = tvp->cmd;
1847 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1850 r = dtv_set_frontend(fe);
1853 c->frequency = tvp->u.data;
1855 case DTV_MODULATION:
1856 c->modulation = tvp->u.data;
1858 case DTV_BANDWIDTH_HZ:
1859 c->bandwidth_hz = tvp->u.data;
1862 c->inversion = tvp->u.data;
1864 case DTV_SYMBOL_RATE:
1865 c->symbol_rate = tvp->u.data;
1868 c->fec_inner = tvp->u.data;
1871 c->pilot = tvp->u.data;
1874 c->rolloff = tvp->u.data;
1876 case DTV_DELIVERY_SYSTEM:
1877 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1880 c->voltage = tvp->u.data;
1881 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1882 (void *)c->voltage);
1885 c->sectone = tvp->u.data;
1886 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1887 (void *)c->sectone);
1889 case DTV_CODE_RATE_HP:
1890 c->code_rate_HP = tvp->u.data;
1892 case DTV_CODE_RATE_LP:
1893 c->code_rate_LP = tvp->u.data;
1895 case DTV_GUARD_INTERVAL:
1896 c->guard_interval = tvp->u.data;
1898 case DTV_TRANSMISSION_MODE:
1899 c->transmission_mode = tvp->u.data;
1902 c->hierarchy = tvp->u.data;
1904 case DTV_INTERLEAVING:
1905 c->interleaving = tvp->u.data;
1908 /* ISDB-T Support here */
1909 case DTV_ISDBT_PARTIAL_RECEPTION:
1910 c->isdbt_partial_reception = tvp->u.data;
1912 case DTV_ISDBT_SOUND_BROADCASTING:
1913 c->isdbt_sb_mode = tvp->u.data;
1915 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1916 c->isdbt_sb_subchannel = tvp->u.data;
1918 case DTV_ISDBT_SB_SEGMENT_IDX:
1919 c->isdbt_sb_segment_idx = tvp->u.data;
1921 case DTV_ISDBT_SB_SEGMENT_COUNT:
1922 c->isdbt_sb_segment_count = tvp->u.data;
1924 case DTV_ISDBT_LAYER_ENABLED:
1925 c->isdbt_layer_enabled = tvp->u.data;
1927 case DTV_ISDBT_LAYERA_FEC:
1928 c->layer[0].fec = tvp->u.data;
1930 case DTV_ISDBT_LAYERA_MODULATION:
1931 c->layer[0].modulation = tvp->u.data;
1933 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1934 c->layer[0].segment_count = tvp->u.data;
1936 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1937 c->layer[0].interleaving = tvp->u.data;
1939 case DTV_ISDBT_LAYERB_FEC:
1940 c->layer[1].fec = tvp->u.data;
1942 case DTV_ISDBT_LAYERB_MODULATION:
1943 c->layer[1].modulation = tvp->u.data;
1945 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1946 c->layer[1].segment_count = tvp->u.data;
1948 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1949 c->layer[1].interleaving = tvp->u.data;
1951 case DTV_ISDBT_LAYERC_FEC:
1952 c->layer[2].fec = tvp->u.data;
1954 case DTV_ISDBT_LAYERC_MODULATION:
1955 c->layer[2].modulation = tvp->u.data;
1957 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1958 c->layer[2].segment_count = tvp->u.data;
1960 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1961 c->layer[2].interleaving = tvp->u.data;
1964 /* Multistream support */
1966 case DTV_DVBT2_PLP_ID_LEGACY:
1967 c->stream_id = tvp->u.data;
1971 case DTV_ATSCMH_PARADE_ID:
1972 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1974 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1975 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1979 c->lna = tvp->u.data;
1980 if (fe->ops.set_lna)
1981 r = fe->ops.set_lna(fe);
1993 static int dvb_frontend_ioctl(struct file *file,
1994 unsigned int cmd, void *parg)
1996 struct dvb_device *dvbdev = file->private_data;
1997 struct dvb_frontend *fe = dvbdev->priv;
1998 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1999 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2000 int err = -EOPNOTSUPP;
2002 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
2003 if (down_interruptible(&fepriv->sem))
2004 return -ERESTARTSYS;
2006 if (fe->exit != DVB_FE_NO_EXIT) {
2011 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
2012 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
2013 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2018 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
2019 err = dvb_frontend_ioctl_properties(file, cmd, parg);
2021 c->state = DTV_UNDEFINED;
2022 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
2029 static int dvb_frontend_ioctl_properties(struct file *file,
2030 unsigned int cmd, void *parg)
2032 struct dvb_device *dvbdev = file->private_data;
2033 struct dvb_frontend *fe = dvbdev->priv;
2034 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2035 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2038 struct dtv_properties *tvps = parg;
2039 struct dtv_property *tvp = NULL;
2042 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2044 if (cmd == FE_SET_PROPERTY) {
2045 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2046 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2048 /* Put an arbitrary limit on the number of messages that can
2049 * be sent at once */
2050 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2053 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2059 if (copy_from_user(tvp, (void __user *)tvps->props,
2060 tvps->num * sizeof(struct dtv_property))) {
2065 for (i = 0; i < tvps->num; i++) {
2066 err = dtv_property_process_set(fe, tvp + i, file);
2069 (tvp + i)->result = err;
2072 if (c->state == DTV_TUNE)
2073 dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
2075 } else if (cmd == FE_GET_PROPERTY) {
2076 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
2077 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2079 /* Put an arbitrary limit on the number of messages that can
2080 * be sent at once */
2081 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2084 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
2090 if (copy_from_user(tvp, (void __user *)tvps->props,
2091 tvps->num * sizeof(struct dtv_property))) {
2097 * Fills the cache out struct with the cache contents, plus
2098 * the data retrieved from get_frontend, if the frontend
2099 * is not idle. Otherwise, returns the cached content
2101 if (fepriv->state != FESTATE_IDLE) {
2102 err = dtv_get_frontend(fe, NULL);
2106 for (i = 0; i < tvps->num; i++) {
2107 err = dtv_property_process_get(fe, c, tvp + i, file);
2110 (tvp + i)->result = err;
2113 if (copy_to_user((void __user *)tvps->props, tvp,
2114 tvps->num * sizeof(struct dtv_property))) {
2127 static int dtv_set_frontend(struct dvb_frontend *fe)
2129 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2130 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2131 struct dvb_frontend_tune_settings fetunesettings;
2134 if (dvb_frontend_check_parameters(fe) < 0)
2138 * Initialize output parameters to match the values given by
2139 * the user. FE_SET_FRONTEND triggers an initial frontend event
2140 * with status = 0, which copies output parameters to userspace.
2142 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2145 * Be sure that the bandwidth will be filled for all
2146 * non-satellite systems, as tuners need to know what
2147 * low pass/Nyquist half filter should be applied, in
2148 * order to avoid inter-channel noise.
2150 * ISDB-T and DVB-T/T2 already sets bandwidth.
2151 * ATSC and DVB-C don't set, so, the core should fill it.
2153 * On DVB-C Annex A and C, the bandwidth is a function of
2154 * the roll-off and symbol rate. Annex B defines different
2155 * roll-off factors depending on the modulation. Fortunately,
2156 * Annex B is only used with 6MHz, so there's no need to
2159 * While not officially supported, a side effect of handling it at
2160 * the cache level is that a program could retrieve the bandwidth
2161 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2163 switch (c->delivery_system) {
2165 case SYS_DVBC_ANNEX_B:
2166 c->bandwidth_hz = 6000000;
2168 case SYS_DVBC_ANNEX_A:
2171 case SYS_DVBC_ANNEX_C:
2180 switch (c->rolloff) {
2196 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2198 /* force auto frequency inversion if requested */
2199 if (dvb_force_auto_inversion)
2200 c->inversion = INVERSION_AUTO;
2203 * without hierarchical coding code_rate_LP is irrelevant,
2204 * so we tolerate the otherwise invalid FEC_NONE setting
2206 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2207 c->code_rate_LP = FEC_AUTO;
2209 /* get frontend-specific tuning settings */
2210 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2211 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2212 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2213 fepriv->max_drift = fetunesettings.max_drift;
2214 fepriv->step_size = fetunesettings.step_size;
2216 /* default values */
2217 switch (c->delivery_system) {
2222 case SYS_DVBC_ANNEX_A:
2223 case SYS_DVBC_ANNEX_C:
2224 fepriv->min_delay = HZ / 20;
2225 fepriv->step_size = c->symbol_rate / 16000;
2226 fepriv->max_drift = c->symbol_rate / 2000;
2232 fepriv->min_delay = HZ / 20;
2233 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2234 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2238 * FIXME: This sounds wrong! if freqency_stepsize is
2239 * defined by the frontend, why not use it???
2241 fepriv->min_delay = HZ / 20;
2242 fepriv->step_size = 0; /* no zigzag */
2243 fepriv->max_drift = 0;
2247 if (dvb_override_tune_delay > 0)
2248 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2250 fepriv->state = FESTATE_RETUNE;
2252 /* Request the search algorithm to search */
2253 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2255 dvb_frontend_clear_events(fe);
2256 dvb_frontend_add_event(fe, 0);
2257 dvb_frontend_wakeup(fe);
2264 static int dvb_frontend_ioctl_legacy(struct file *file,
2265 unsigned int cmd, void *parg)
2267 struct dvb_device *dvbdev = file->private_data;
2268 struct dvb_frontend *fe = dvbdev->priv;
2269 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2270 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2271 int err = -EOPNOTSUPP;
2275 struct dvb_frontend_info* info = parg;
2277 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2278 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2281 * Associate the 4 delivery systems supported by DVBv3
2282 * API with their DVBv5 counterpart. For the other standards,
2283 * use the closest type, assuming that it would hopefully
2284 * work with a DVBv3 application.
2285 * It should be noticed that, on multi-frontend devices with
2286 * different types (terrestrial and cable, for example),
2287 * a pure DVBv3 application won't be able to use all delivery
2288 * systems. Yet, changing the DVBv5 cache to the other delivery
2289 * system should be enough for making it work.
2291 switch (dvbv3_type(c->delivery_system)) {
2293 info->type = FE_QPSK;
2296 info->type = FE_ATSC;
2299 info->type = FE_QAM;
2302 info->type = FE_OFDM;
2305 dev_err(fe->dvb->device,
2306 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2307 __func__, c->delivery_system);
2308 fe->ops.info.type = FE_OFDM;
2310 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2311 __func__, c->delivery_system, fe->ops.info.type);
2313 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2314 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2315 info->caps |= FE_CAN_INVERSION_AUTO;
2320 case FE_READ_STATUS: {
2321 enum fe_status *status = parg;
2323 /* if retune was requested but hasn't occurred yet, prevent
2324 * that user get signal state from previous tuning */
2325 if (fepriv->state == FESTATE_RETUNE ||
2326 fepriv->state == FESTATE_ERROR) {
2332 if (fe->ops.read_status)
2333 err = fe->ops.read_status(fe, status);
2338 if (fe->ops.read_ber) {
2340 err = fe->ops.read_ber(fe, (__u32 *) parg);
2346 case FE_READ_SIGNAL_STRENGTH:
2347 if (fe->ops.read_signal_strength) {
2349 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2356 if (fe->ops.read_snr) {
2358 err = fe->ops.read_snr(fe, (__u16 *) parg);
2364 case FE_READ_UNCORRECTED_BLOCKS:
2365 if (fe->ops.read_ucblocks) {
2367 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2373 case FE_DISEQC_RESET_OVERLOAD:
2374 if (fe->ops.diseqc_reset_overload) {
2375 err = fe->ops.diseqc_reset_overload(fe);
2376 fepriv->state = FESTATE_DISEQC;
2381 case FE_DISEQC_SEND_MASTER_CMD:
2382 if (fe->ops.diseqc_send_master_cmd) {
2383 struct dvb_diseqc_master_cmd *cmd = parg;
2385 if (cmd->msg_len > sizeof(cmd->msg)) {
2389 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2390 fepriv->state = FESTATE_DISEQC;
2395 case FE_DISEQC_SEND_BURST:
2396 if (fe->ops.diseqc_send_burst) {
2397 err = fe->ops.diseqc_send_burst(fe,
2398 (enum fe_sec_mini_cmd)parg);
2399 fepriv->state = FESTATE_DISEQC;
2405 if (fe->ops.set_tone) {
2406 err = fe->ops.set_tone(fe,
2407 (enum fe_sec_tone_mode)parg);
2408 fepriv->tone = (enum fe_sec_tone_mode)parg;
2409 fepriv->state = FESTATE_DISEQC;
2414 case FE_SET_VOLTAGE:
2415 if (fe->ops.set_voltage) {
2416 err = fe->ops.set_voltage(fe,
2417 (enum fe_sec_voltage)parg);
2418 fepriv->voltage = (enum fe_sec_voltage)parg;
2419 fepriv->state = FESTATE_DISEQC;
2424 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2425 if (fe->ops.dishnetwork_send_legacy_command) {
2426 err = fe->ops.dishnetwork_send_legacy_command(fe,
2427 (unsigned long)parg);
2428 fepriv->state = FESTATE_DISEQC;
2430 } else if (fe->ops.set_voltage) {
2432 * NOTE: This is a fallback condition. Some frontends
2433 * (stv0299 for instance) take longer than 8msec to
2434 * respond to a set_voltage command. Those switches
2435 * need custom routines to switch properly. For all
2436 * other frontends, the following should work ok.
2437 * Dish network legacy switches (as used by Dish500)
2438 * are controlled by sending 9-bit command words
2439 * spaced 8msec apart.
2440 * the actual command word is switch/port dependent
2441 * so it is up to the userspace application to send
2442 * the right command.
2443 * The command must always start with a '0' after
2444 * initialization, so parg is 8 bits and does not
2445 * include the initialization or start bit
2447 unsigned long swcmd = ((unsigned long) parg) << 1;
2452 if (dvb_frontend_debug)
2453 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2454 nexttime = ktime_get_real();
2455 if (dvb_frontend_debug)
2457 /* before sending a command, initialize by sending
2458 * a 32ms 18V to the switch
2460 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2461 dvb_frontend_sleep_until(&nexttime, 32000);
2463 for (i = 0; i < 9; i++) {
2464 if (dvb_frontend_debug)
2465 tv[i+1] = ktime_get_real();
2466 if ((swcmd & 0x01) != last) {
2467 /* set voltage to (last ? 13V : 18V) */
2468 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2469 last = (last) ? 0 : 1;
2473 dvb_frontend_sleep_until(&nexttime, 8000);
2475 if (dvb_frontend_debug) {
2476 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2477 __func__, fe->dvb->num);
2478 for (i = 1; i < 10; i++)
2479 printk("%d: %d\n", i,
2480 (int) ktime_us_delta(tv[i], tv[i-1]));
2483 fepriv->state = FESTATE_DISEQC;
2488 case FE_DISEQC_RECV_SLAVE_REPLY:
2489 if (fe->ops.diseqc_recv_slave_reply)
2490 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2493 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2494 if (fe->ops.enable_high_lnb_voltage)
2495 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2498 case FE_SET_FRONTEND:
2499 err = dvbv3_set_delivery_system(fe);
2503 err = dtv_property_cache_sync(fe, c, parg);
2506 err = dtv_set_frontend(fe);
2509 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2512 case FE_GET_FRONTEND:
2513 err = dtv_get_frontend(fe, parg);
2516 case FE_SET_FRONTEND_TUNE_MODE:
2517 fepriv->tune_mode_flags = (unsigned long) parg;
2526 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2528 struct dvb_device *dvbdev = file->private_data;
2529 struct dvb_frontend *fe = dvbdev->priv;
2530 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2532 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2534 poll_wait (file, &fepriv->events.wait_queue, wait);
2536 if (fepriv->events.eventw != fepriv->events.eventr)
2537 return (POLLIN | POLLRDNORM | POLLPRI);
2542 static int dvb_frontend_open(struct inode *inode, struct file *file)
2544 struct dvb_device *dvbdev = file->private_data;
2545 struct dvb_frontend *fe = dvbdev->priv;
2546 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2547 struct dvb_adapter *adapter = fe->dvb;
2550 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2551 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2554 if (adapter->mfe_shared) {
2555 mutex_lock (&adapter->mfe_lock);
2557 if (adapter->mfe_dvbdev == NULL)
2558 adapter->mfe_dvbdev = dvbdev;
2560 else if (adapter->mfe_dvbdev != dvbdev) {
2562 *mfedev = adapter->mfe_dvbdev;
2564 *mfe = mfedev->priv;
2565 struct dvb_frontend_private
2566 *mfepriv = mfe->frontend_priv;
2567 int mferetry = (dvb_mfe_wait_time << 1);
2569 mutex_unlock (&adapter->mfe_lock);
2570 while (mferetry-- && (mfedev->users != -1 ||
2571 mfepriv->thread != NULL)) {
2572 if(msleep_interruptible(500)) {
2573 if(signal_pending(current))
2578 mutex_lock (&adapter->mfe_lock);
2579 if(adapter->mfe_dvbdev != dvbdev) {
2580 mfedev = adapter->mfe_dvbdev;
2582 mfepriv = mfe->frontend_priv;
2583 if (mfedev->users != -1 ||
2584 mfepriv->thread != NULL) {
2585 mutex_unlock (&adapter->mfe_lock);
2588 adapter->mfe_dvbdev = dvbdev;
2593 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2594 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2597 /* If we took control of the bus, we need to force
2598 reinitialization. This is because many ts_bus_ctrl()
2599 functions strobe the RESET pin on the demod, and if the
2600 frontend thread already exists then the dvb_init() routine
2601 won't get called (which is what usually does initial
2602 register configuration). */
2603 fepriv->reinitialise = 1;
2606 if ((ret = dvb_generic_open (inode, file)) < 0)
2609 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2610 /* normal tune mode when opened R/W */
2611 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2613 fepriv->voltage = -1;
2615 ret = dvb_frontend_start (fe);
2619 /* empty event queue */
2620 fepriv->events.eventr = fepriv->events.eventw = 0;
2623 if (adapter->mfe_shared)
2624 mutex_unlock (&adapter->mfe_lock);
2628 dvb_generic_release(inode, file);
2630 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2631 fe->ops.ts_bus_ctrl(fe, 0);
2633 if (adapter->mfe_shared)
2634 mutex_unlock (&adapter->mfe_lock);
2638 static int dvb_frontend_release(struct inode *inode, struct file *file)
2640 struct dvb_device *dvbdev = file->private_data;
2641 struct dvb_frontend *fe = dvbdev->priv;
2642 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2645 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2647 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2648 fepriv->release_jiffies = jiffies;
2652 ret = dvb_generic_release (inode, file);
2654 if (dvbdev->users == -1) {
2655 wake_up(&fepriv->wait_queue);
2656 if (fe->exit != DVB_FE_NO_EXIT)
2657 wake_up(&dvbdev->wait_queue);
2658 if (fe->ops.ts_bus_ctrl)
2659 fe->ops.ts_bus_ctrl(fe, 0);
2665 static const struct file_operations dvb_frontend_fops = {
2666 .owner = THIS_MODULE,
2667 .unlocked_ioctl = dvb_generic_ioctl,
2668 .poll = dvb_frontend_poll,
2669 .open = dvb_frontend_open,
2670 .release = dvb_frontend_release,
2671 .llseek = noop_llseek,
2674 int dvb_frontend_suspend(struct dvb_frontend *fe)
2678 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2681 if (fe->ops.tuner_ops.suspend)
2682 ret = fe->ops.tuner_ops.suspend(fe);
2683 else if (fe->ops.tuner_ops.sleep)
2684 ret = fe->ops.tuner_ops.sleep(fe);
2687 ret = fe->ops.sleep(fe);
2691 EXPORT_SYMBOL(dvb_frontend_suspend);
2693 int dvb_frontend_resume(struct dvb_frontend *fe)
2695 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2698 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2701 fe->exit = DVB_FE_DEVICE_RESUME;
2703 ret = fe->ops.init(fe);
2705 if (fe->ops.tuner_ops.resume)
2706 ret = fe->ops.tuner_ops.resume(fe);
2707 else if (fe->ops.tuner_ops.init)
2708 ret = fe->ops.tuner_ops.init(fe);
2710 if (fe->ops.set_tone && fepriv->tone != -1)
2711 fe->ops.set_tone(fe, fepriv->tone);
2712 if (fe->ops.set_voltage && fepriv->voltage != -1)
2713 fe->ops.set_voltage(fe, fepriv->voltage);
2715 fe->exit = DVB_FE_NO_EXIT;
2716 fepriv->state = FESTATE_RETUNE;
2717 dvb_frontend_wakeup(fe);
2721 EXPORT_SYMBOL(dvb_frontend_resume);
2723 int dvb_register_frontend(struct dvb_adapter* dvb,
2724 struct dvb_frontend* fe)
2726 struct dvb_frontend_private *fepriv;
2727 const struct dvb_device dvbdev_template = {
2731 .fops = &dvb_frontend_fops,
2732 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2733 .name = fe->ops.info.name,
2735 .kernel_ioctl = dvb_frontend_ioctl
2738 dev_dbg(dvb->device, "%s:\n", __func__);
2740 if (mutex_lock_interruptible(&frontend_mutex))
2741 return -ERESTARTSYS;
2743 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2744 if (fe->frontend_priv == NULL) {
2745 mutex_unlock(&frontend_mutex);
2748 fepriv = fe->frontend_priv;
2750 sema_init(&fepriv->sem, 1);
2751 init_waitqueue_head (&fepriv->wait_queue);
2752 init_waitqueue_head (&fepriv->events.wait_queue);
2753 mutex_init(&fepriv->events.mtx);
2755 fepriv->inversion = INVERSION_OFF;
2757 dev_info(fe->dvb->device,
2758 "DVB: registering adapter %i frontend %i (%s)...\n",
2759 fe->dvb->num, fe->id, fe->ops.info.name);
2761 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2762 fe, DVB_DEVICE_FRONTEND, 0);
2765 * Initialize the cache to the proper values according with the
2766 * first supported delivery system (ops->delsys[0])
2769 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2770 dvb_frontend_clear_cache(fe);
2772 mutex_unlock(&frontend_mutex);
2775 EXPORT_SYMBOL(dvb_register_frontend);
2777 int dvb_unregister_frontend(struct dvb_frontend* fe)
2779 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2780 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2782 mutex_lock(&frontend_mutex);
2783 dvb_frontend_stop (fe);
2784 mutex_unlock(&frontend_mutex);
2786 if (fepriv->dvbdev->users < -1)
2787 wait_event(fepriv->dvbdev->wait_queue,
2788 fepriv->dvbdev->users==-1);
2790 mutex_lock(&frontend_mutex);
2791 dvb_unregister_device (fepriv->dvbdev);
2793 /* fe is invalid now */
2795 mutex_unlock(&frontend_mutex);
2798 EXPORT_SYMBOL(dvb_unregister_frontend);
2800 #ifdef CONFIG_MEDIA_ATTACH
2801 void dvb_frontend_detach(struct dvb_frontend* fe)
2805 if (fe->ops.release_sec) {
2806 fe->ops.release_sec(fe);
2807 dvb_detach(fe->ops.release_sec);
2809 if (fe->ops.tuner_ops.release) {
2810 fe->ops.tuner_ops.release(fe);
2811 dvb_detach(fe->ops.tuner_ops.release);
2813 if (fe->ops.analog_ops.release) {
2814 fe->ops.analog_ops.release(fe);
2815 dvb_detach(fe->ops.analog_ops.release);
2817 ptr = (void*)fe->ops.release;
2819 fe->ops.release(fe);
2824 void dvb_frontend_detach(struct dvb_frontend* fe)
2826 if (fe->ops.release_sec)
2827 fe->ops.release_sec(fe);
2828 if (fe->ops.tuner_ops.release)
2829 fe->ops.tuner_ops.release(fe);
2830 if (fe->ops.analog_ops.release)
2831 fe->ops.analog_ops.release(fe);
2832 if (fe->ops.release)
2833 fe->ops.release(fe);
2836 EXPORT_SYMBOL(dvb_frontend_detach);