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 <linux/compat.h>
45 #include <asm/processor.h>
47 #include "dvb_frontend.h"
49 #include <linux/dvb/version.h>
51 static int dvb_frontend_debug;
52 static int dvb_shutdown_timeout;
53 static int dvb_force_auto_inversion;
54 static int dvb_override_tune_delay;
55 static int dvb_powerdown_on_sleep = 1;
56 static int dvb_mfe_wait_time = 5;
58 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
59 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
60 module_param(dvb_shutdown_timeout, int, 0644);
61 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
62 module_param(dvb_force_auto_inversion, int, 0644);
63 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
64 module_param(dvb_override_tune_delay, int, 0644);
65 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
66 module_param(dvb_powerdown_on_sleep, int, 0644);
67 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
68 module_param(dvb_mfe_wait_time, int, 0644);
69 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)");
71 #define FESTATE_IDLE 1
72 #define FESTATE_RETUNE 2
73 #define FESTATE_TUNING_FAST 4
74 #define FESTATE_TUNING_SLOW 8
75 #define FESTATE_TUNED 16
76 #define FESTATE_ZIGZAG_FAST 32
77 #define FESTATE_ZIGZAG_SLOW 64
78 #define FESTATE_DISEQC 128
79 #define FESTATE_ERROR 256
80 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
81 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
82 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
83 #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 {
103 struct kref refcount;
105 /* thread/frontend values */
106 struct dvb_device *dvbdev;
107 struct dvb_frontend_parameters parameters_out;
108 struct dvb_fe_events events;
109 struct semaphore sem;
110 struct list_head list_head;
111 wait_queue_head_t wait_queue;
112 struct task_struct *thread;
113 unsigned long release_jiffies;
115 enum fe_status status;
116 unsigned long tune_mode_flags;
118 unsigned int reinitialise;
122 /* swzigzag values */
124 unsigned int bending;
126 unsigned int inversion;
127 unsigned int auto_step;
128 unsigned int auto_sub_step;
129 unsigned int started_auto_step;
130 unsigned int min_delay;
131 unsigned int max_drift;
132 unsigned int step_size;
134 unsigned int check_wrapped;
135 enum dvbfe_search algo_status;
137 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
138 struct media_pipeline pipe;
142 static void dvb_frontend_private_free(struct kref *ref)
144 struct dvb_frontend_private *fepriv =
145 container_of(ref, struct dvb_frontend_private, refcount);
149 static void dvb_frontend_private_put(struct dvb_frontend_private *fepriv)
151 kref_put(&fepriv->refcount, dvb_frontend_private_free);
154 static void dvb_frontend_private_get(struct dvb_frontend_private *fepriv)
156 kref_get(&fepriv->refcount);
159 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
160 static int dtv_get_frontend(struct dvb_frontend *fe,
161 struct dtv_frontend_properties *c,
162 struct dvb_frontend_parameters *p_out);
164 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
165 const struct dtv_frontend_properties *c,
166 struct dvb_frontend_parameters *p);
168 static bool has_get_frontend(struct dvb_frontend *fe)
170 return fe->ops.get_frontend != NULL;
174 * Due to DVBv3 API calls, a delivery system should be mapped into one of
175 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
176 * otherwise, a DVBv3 call will fail.
178 enum dvbv3_emulation_type {
186 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
188 switch (delivery_system) {
189 case SYS_DVBC_ANNEX_A:
190 case SYS_DVBC_ANNEX_C:
205 case SYS_DVBC_ANNEX_B:
213 * Doesn't know how to emulate those types and/or
214 * there's no frontend driver from this type yet
215 * with some emulation code, so, we're not sure yet how
216 * to handle them, or they're not compatible with a DVBv3 call.
218 return DVBV3_UNKNOWN;
222 static void dvb_frontend_add_event(struct dvb_frontend *fe,
223 enum fe_status status)
225 struct dvb_frontend_private *fepriv = fe->frontend_priv;
226 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
227 struct dvb_fe_events *events = &fepriv->events;
228 struct dvb_frontend_event *e;
231 dev_dbg(fe->dvb->device, "%s:\n", __func__);
233 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
234 dtv_get_frontend(fe, c, &fepriv->parameters_out);
236 mutex_lock(&events->mtx);
238 wp = (events->eventw + 1) % MAX_EVENT;
239 if (wp == events->eventr) {
240 events->overflow = 1;
241 events->eventr = (events->eventr + 1) % MAX_EVENT;
244 e = &events->events[events->eventw];
246 e->parameters = fepriv->parameters_out;
250 mutex_unlock(&events->mtx);
252 wake_up_interruptible (&events->wait_queue);
255 static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv,
256 struct dvb_fe_events *events)
261 ret = events->eventw != events->eventr;
267 static int dvb_frontend_get_event(struct dvb_frontend *fe,
268 struct dvb_frontend_event *event, int flags)
270 struct dvb_frontend_private *fepriv = fe->frontend_priv;
271 struct dvb_fe_events *events = &fepriv->events;
273 dev_dbg(fe->dvb->device, "%s:\n", __func__);
275 if (events->overflow) {
276 events->overflow = 0;
280 if (events->eventw == events->eventr) {
283 if (flags & O_NONBLOCK)
286 ret = wait_event_interruptible(events->wait_queue,
287 dvb_frontend_test_event(fepriv, events));
293 mutex_lock(&events->mtx);
294 *event = events->events[events->eventr];
295 events->eventr = (events->eventr + 1) % MAX_EVENT;
296 mutex_unlock(&events->mtx);
301 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
303 struct dvb_frontend_private *fepriv = fe->frontend_priv;
304 struct dvb_fe_events *events = &fepriv->events;
306 mutex_lock(&events->mtx);
307 events->eventr = events->eventw;
308 mutex_unlock(&events->mtx);
311 static void dvb_frontend_init(struct dvb_frontend *fe)
313 dev_dbg(fe->dvb->device,
314 "%s: initialising adapter %i frontend %i (%s)...\n",
315 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
319 if (fe->ops.tuner_ops.init) {
320 if (fe->ops.i2c_gate_ctrl)
321 fe->ops.i2c_gate_ctrl(fe, 1);
322 fe->ops.tuner_ops.init(fe);
323 if (fe->ops.i2c_gate_ctrl)
324 fe->ops.i2c_gate_ctrl(fe, 0);
328 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
330 struct dvb_frontend_private *fepriv = fe->frontend_priv;
332 fepriv->reinitialise = 1;
333 dvb_frontend_wakeup(fe);
335 EXPORT_SYMBOL(dvb_frontend_reinitialise);
337 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
340 struct dvb_frontend *fe = fepriv->dvbdev->priv;
342 dev_dbg(fe->dvb->device, "%s:\n", __func__);
345 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
347 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
349 q2 = fepriv->quality - 128;
352 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
356 * Performs automatic twiddling of frontend parameters.
358 * @param fe The frontend concerned.
359 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
360 * @returns Number of complete iterations that have been performed.
362 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
367 struct dvb_frontend_private *fepriv = fe->frontend_priv;
368 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
369 int original_inversion = c->inversion;
370 u32 original_frequency = c->frequency;
372 /* are we using autoinversion? */
373 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
374 (c->inversion == INVERSION_AUTO));
376 /* setup parameters correctly */
378 /* calculate the lnb_drift */
379 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
381 /* wrap the auto_step if we've exceeded the maximum drift */
382 if (fepriv->lnb_drift > fepriv->max_drift) {
383 fepriv->auto_step = 0;
384 fepriv->auto_sub_step = 0;
385 fepriv->lnb_drift = 0;
388 /* perform inversion and +/- zigzag */
389 switch(fepriv->auto_sub_step) {
391 /* try with the current inversion and current drift setting */
396 if (!autoinversion) break;
398 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
403 if (fepriv->lnb_drift == 0) break;
405 fepriv->lnb_drift = -fepriv->lnb_drift;
410 if (fepriv->lnb_drift == 0) break;
411 if (!autoinversion) break;
413 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
414 fepriv->lnb_drift = -fepriv->lnb_drift;
420 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
424 if (!ready) fepriv->auto_sub_step++;
427 /* if this attempt would hit where we started, indicate a complete
428 * iteration has occurred */
429 if ((fepriv->auto_step == fepriv->started_auto_step) &&
430 (fepriv->auto_sub_step == 0) && check_wrapped) {
434 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
435 "auto_sub_step:%i started_auto_step:%i\n",
436 __func__, fepriv->lnb_drift, fepriv->inversion,
437 fepriv->auto_step, fepriv->auto_sub_step,
438 fepriv->started_auto_step);
440 /* set the frontend itself */
441 c->frequency += fepriv->lnb_drift;
443 c->inversion = fepriv->inversion;
445 if (fe->ops.set_frontend)
446 fe_set_err = fe->ops.set_frontend(fe);
448 if (fe_set_err < 0) {
449 fepriv->state = FESTATE_ERROR;
453 c->frequency = original_frequency;
454 c->inversion = original_inversion;
456 fepriv->auto_sub_step++;
460 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
462 enum fe_status s = FE_NONE;
464 struct dvb_frontend_private *fepriv = fe->frontend_priv;
465 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
467 /* if we've got no parameters, just keep idling */
468 if (fepriv->state & FESTATE_IDLE) {
469 fepriv->delay = 3*HZ;
474 /* in SCAN mode, we just set the frontend when asked and leave it alone */
475 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
476 if (fepriv->state & FESTATE_RETUNE) {
478 if (fe->ops.set_frontend)
479 retval = fe->ops.set_frontend(fe);
482 fepriv->state = FESTATE_ERROR;
484 fepriv->state = FESTATE_TUNED;
486 fepriv->delay = 3*HZ;
491 /* get the frontend status */
492 if (fepriv->state & FESTATE_RETUNE) {
495 if (fe->ops.read_status)
496 fe->ops.read_status(fe, &s);
497 if (s != fepriv->status) {
498 dvb_frontend_add_event(fe, s);
503 /* if we're not tuned, and we have a lock, move to the TUNED state */
504 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
505 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
506 fepriv->state = FESTATE_TUNED;
508 /* if we're tuned, then we have determined the correct inversion */
509 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
510 (c->inversion == INVERSION_AUTO)) {
511 c->inversion = fepriv->inversion;
516 /* if we are tuned already, check we're still locked */
517 if (fepriv->state & FESTATE_TUNED) {
518 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
520 /* we're tuned, and the lock is still good... */
521 if (s & FE_HAS_LOCK) {
523 } else { /* if we _WERE_ tuned, but now don't have a lock */
524 fepriv->state = FESTATE_ZIGZAG_FAST;
525 fepriv->started_auto_step = fepriv->auto_step;
526 fepriv->check_wrapped = 0;
530 /* don't actually do anything if we're in the LOSTLOCK state,
531 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
532 if ((fepriv->state & FESTATE_LOSTLOCK) &&
533 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
534 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
538 /* don't do anything if we're in the DISEQC state, since this
539 * might be someone with a motorized dish controlled by DISEQC.
540 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
541 if (fepriv->state & FESTATE_DISEQC) {
542 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
546 /* if we're in the RETUNE state, set everything up for a brand
547 * new scan, keeping the current inversion setting, as the next
548 * tune is _very_ likely to require the same */
549 if (fepriv->state & FESTATE_RETUNE) {
550 fepriv->lnb_drift = 0;
551 fepriv->auto_step = 0;
552 fepriv->auto_sub_step = 0;
553 fepriv->started_auto_step = 0;
554 fepriv->check_wrapped = 0;
558 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
559 fepriv->delay = fepriv->min_delay;
562 retval = dvb_frontend_swzigzag_autotune(fe,
563 fepriv->check_wrapped);
567 /* OK, if we've run out of trials at the fast speed.
568 * Drop back to slow for the _next_ attempt */
569 fepriv->state = FESTATE_SEARCHING_SLOW;
570 fepriv->started_auto_step = fepriv->auto_step;
573 fepriv->check_wrapped = 1;
575 /* if we've just retuned, enter the ZIGZAG_FAST state.
576 * This ensures we cannot return from an
577 * FE_SET_FRONTEND ioctl before the first frontend tune
579 if (fepriv->state & FESTATE_RETUNE) {
580 fepriv->state = FESTATE_TUNING_FAST;
585 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
586 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
588 /* Note: don't bother checking for wrapping; we stay in this
589 * state until we get a lock */
590 dvb_frontend_swzigzag_autotune(fe, 0);
594 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
596 struct dvb_frontend_private *fepriv = fe->frontend_priv;
598 if (fe->exit != DVB_FE_NO_EXIT)
601 if (fepriv->dvbdev->writers == 1)
602 if (time_after_eq(jiffies, fepriv->release_jiffies +
603 dvb_shutdown_timeout * HZ))
609 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
611 struct dvb_frontend_private *fepriv = fe->frontend_priv;
613 if (fepriv->wakeup) {
617 return dvb_frontend_is_exiting(fe);
620 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
622 struct dvb_frontend_private *fepriv = fe->frontend_priv;
625 wake_up_interruptible(&fepriv->wait_queue);
628 static int dvb_frontend_thread(void *data)
630 struct dvb_frontend *fe = data;
631 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
632 struct dvb_frontend_private *fepriv = fe->frontend_priv;
633 enum fe_status s = FE_NONE;
634 enum dvbfe_algo algo;
635 bool re_tune = false;
636 bool semheld = false;
638 dev_dbg(fe->dvb->device, "%s:\n", __func__);
640 fepriv->check_wrapped = 0;
642 fepriv->delay = 3*HZ;
645 fepriv->reinitialise = 0;
647 dvb_frontend_init(fe);
651 up(&fepriv->sem); /* is locked when we enter the thread... */
653 wait_event_interruptible_timeout(fepriv->wait_queue,
654 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
655 || freezing(current),
658 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
659 /* got signal or quitting */
660 if (!down_interruptible(&fepriv->sem))
662 fe->exit = DVB_FE_NORMAL_EXIT;
669 if (down_interruptible(&fepriv->sem))
672 if (fepriv->reinitialise) {
673 dvb_frontend_init(fe);
674 if (fe->ops.set_tone && fepriv->tone != -1)
675 fe->ops.set_tone(fe, fepriv->tone);
676 if (fe->ops.set_voltage && fepriv->voltage != -1)
677 fe->ops.set_voltage(fe, fepriv->voltage);
678 fepriv->reinitialise = 0;
681 /* do an iteration of the tuning loop */
682 if (fe->ops.get_frontend_algo) {
683 algo = fe->ops.get_frontend_algo(fe);
686 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
688 if (fepriv->state & FESTATE_RETUNE) {
689 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
691 fepriv->state = FESTATE_TUNED;
697 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
699 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
700 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
701 dvb_frontend_add_event(fe, s);
706 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
707 dvb_frontend_swzigzag(fe);
709 case DVBFE_ALGO_CUSTOM:
710 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
711 if (fepriv->state & FESTATE_RETUNE) {
712 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
713 fepriv->state = FESTATE_TUNED;
715 /* Case where we are going to search for a carrier
716 * User asked us to retune again for some reason, possibly
717 * requesting a search with a new set of parameters
719 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
720 if (fe->ops.search) {
721 fepriv->algo_status = fe->ops.search(fe);
722 /* We did do a search as was requested, the flags are
723 * now unset as well and has the flags wrt to search.
726 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
729 /* Track the carrier if the search was successful */
730 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
731 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
732 fepriv->delay = HZ / 2;
734 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
735 fe->ops.read_status(fe, &s);
736 if (s != fepriv->status) {
737 dvb_frontend_add_event(fe, s); /* update event list */
739 if (!(s & FE_HAS_LOCK)) {
740 fepriv->delay = HZ / 10;
741 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
743 fepriv->delay = 60 * HZ;
748 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
752 dvb_frontend_swzigzag(fe);
756 if (dvb_powerdown_on_sleep) {
757 if (fe->ops.set_voltage)
758 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
759 if (fe->ops.tuner_ops.sleep) {
760 if (fe->ops.i2c_gate_ctrl)
761 fe->ops.i2c_gate_ctrl(fe, 1);
762 fe->ops.tuner_ops.sleep(fe);
763 if (fe->ops.i2c_gate_ctrl)
764 fe->ops.i2c_gate_ctrl(fe, 0);
770 fepriv->thread = NULL;
771 if (kthread_should_stop())
772 fe->exit = DVB_FE_DEVICE_REMOVED;
774 fe->exit = DVB_FE_NO_EXIT;
779 dvb_frontend_wakeup(fe);
783 static void dvb_frontend_stop(struct dvb_frontend *fe)
785 struct dvb_frontend_private *fepriv = fe->frontend_priv;
787 dev_dbg(fe->dvb->device, "%s:\n", __func__);
789 if (fe->exit != DVB_FE_DEVICE_REMOVED)
790 fe->exit = DVB_FE_NORMAL_EXIT;
796 kthread_stop(fepriv->thread);
798 sema_init(&fepriv->sem, 1);
799 fepriv->state = FESTATE_IDLE;
801 /* paranoia check in case a signal arrived */
803 dev_warn(fe->dvb->device,
804 "dvb_frontend_stop: warning: thread %p won't exit\n",
809 * Sleep for the amount of time given by add_usec parameter
811 * This needs to be as precise as possible, as it affects the detection of
812 * the dish tone command at the satellite subsystem. The precision is improved
813 * by using a scheduled msleep followed by udelay for the remainder.
815 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
819 *waketime = ktime_add_us(*waketime, add_usec);
820 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
822 msleep((delta - 1500) / 1000);
823 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
828 EXPORT_SYMBOL(dvb_frontend_sleep_until);
830 static int dvb_frontend_start(struct dvb_frontend *fe)
833 struct dvb_frontend_private *fepriv = fe->frontend_priv;
834 struct task_struct *fe_thread;
836 dev_dbg(fe->dvb->device, "%s:\n", __func__);
838 if (fepriv->thread) {
839 if (fe->exit == DVB_FE_NO_EXIT)
842 dvb_frontend_stop (fe);
845 if (signal_pending(current))
847 if (down_interruptible (&fepriv->sem))
850 fepriv->state = FESTATE_IDLE;
851 fe->exit = DVB_FE_NO_EXIT;
852 fepriv->thread = NULL;
855 fe_thread = kthread_run(dvb_frontend_thread, fe,
856 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
857 if (IS_ERR(fe_thread)) {
858 ret = PTR_ERR(fe_thread);
859 dev_warn(fe->dvb->device,
860 "dvb_frontend_start: failed to start kthread (%d)\n",
865 fepriv->thread = fe_thread;
869 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
870 u32 *freq_min, u32 *freq_max)
872 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
874 if (fe->ops.info.frequency_max == 0)
875 *freq_max = fe->ops.tuner_ops.info.frequency_max;
876 else if (fe->ops.tuner_ops.info.frequency_max == 0)
877 *freq_max = fe->ops.info.frequency_max;
879 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
881 if (*freq_min == 0 || *freq_max == 0)
882 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
883 fe->dvb->num, fe->id);
886 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
888 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
892 /* range check: frequency */
893 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
894 if ((freq_min && c->frequency < freq_min) ||
895 (freq_max && c->frequency > freq_max)) {
896 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
897 fe->dvb->num, fe->id, c->frequency,
902 /* range check: symbol rate */
903 switch (c->delivery_system) {
907 case SYS_DVBC_ANNEX_A:
908 case SYS_DVBC_ANNEX_C:
909 if ((fe->ops.info.symbol_rate_min &&
910 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
911 (fe->ops.info.symbol_rate_max &&
912 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
913 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
914 fe->dvb->num, fe->id, c->symbol_rate,
915 fe->ops.info.symbol_rate_min,
916 fe->ops.info.symbol_rate_max);
926 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
928 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
932 delsys = c->delivery_system;
933 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
934 c->delivery_system = delsys;
936 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
937 __func__, c->delivery_system);
939 c->transmission_mode = TRANSMISSION_MODE_AUTO;
940 c->bandwidth_hz = 0; /* AUTO */
941 c->guard_interval = GUARD_INTERVAL_AUTO;
942 c->hierarchy = HIERARCHY_AUTO;
944 c->code_rate_HP = FEC_AUTO;
945 c->code_rate_LP = FEC_AUTO;
946 c->fec_inner = FEC_AUTO;
947 c->rolloff = ROLLOFF_AUTO;
948 c->voltage = SEC_VOLTAGE_OFF;
949 c->sectone = SEC_TONE_OFF;
950 c->pilot = PILOT_AUTO;
952 c->isdbt_partial_reception = 0;
953 c->isdbt_sb_mode = 0;
954 c->isdbt_sb_subchannel = 0;
955 c->isdbt_sb_segment_idx = 0;
956 c->isdbt_sb_segment_count = 0;
957 c->isdbt_layer_enabled = 0;
958 for (i = 0; i < 3; i++) {
959 c->layer[i].fec = FEC_AUTO;
960 c->layer[i].modulation = QAM_AUTO;
961 c->layer[i].interleaving = 0;
962 c->layer[i].segment_count = 0;
965 c->stream_id = NO_STREAM_ID_FILTER;
967 switch (c->delivery_system) {
971 c->modulation = QPSK; /* implied for DVB-S in legacy API */
972 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
975 c->modulation = VSB_8;
978 c->symbol_rate = 28860000;
979 c->rolloff = ROLLOFF_35;
980 c->bandwidth_hz = c->symbol_rate / 100 * 135;
983 c->modulation = QAM_AUTO;
992 #define _DTV_CMD(n, s, b) \
1001 char *name; /* A display name for debugging purposes */
1003 __u32 cmd; /* A unique ID */
1006 __u32 set:1; /* Either a set or get property */
1007 __u32 buffer:1; /* Does this property use the buffer? */
1008 __u32 reserved:30; /* Align */
1011 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1012 _DTV_CMD(DTV_TUNE, 1, 0),
1013 _DTV_CMD(DTV_CLEAR, 1, 0),
1016 _DTV_CMD(DTV_FREQUENCY, 1, 0),
1017 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1018 _DTV_CMD(DTV_MODULATION, 1, 0),
1019 _DTV_CMD(DTV_INVERSION, 1, 0),
1020 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1021 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1022 _DTV_CMD(DTV_INNER_FEC, 1, 0),
1023 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1024 _DTV_CMD(DTV_TONE, 1, 0),
1025 _DTV_CMD(DTV_PILOT, 1, 0),
1026 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1027 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1028 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1029 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1030 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1031 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1032 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1033 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1035 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1036 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1037 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1038 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1039 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1040 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1041 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1042 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1043 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1044 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1045 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1046 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1047 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1048 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1049 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1050 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1051 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1052 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1054 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1055 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1056 _DTV_CMD(DTV_LNA, 1, 0),
1059 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1060 _DTV_CMD(DTV_API_VERSION, 0, 0),
1062 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1064 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1065 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1067 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1068 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1069 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1070 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1071 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1072 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1073 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1074 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1075 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1076 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1077 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1078 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1079 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1081 /* Statistics API */
1082 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1083 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1084 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1085 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1086 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1087 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1088 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1089 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1092 static void dtv_get_property_dump(struct dvb_frontend *fe,
1093 struct dtv_property *tvp)
1097 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1098 dev_warn(fe->dvb->device, "%s: GET tvp.cmd = 0x%08x undefined\n"
1104 dev_dbg(fe->dvb->device, "%s: GET tvp.cmd = 0x%08x (%s)\n", __func__,
1106 dtv_cmds[tvp->cmd].name);
1108 if (dtv_cmds[tvp->cmd].buffer) {
1109 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1110 __func__, tvp->u.buffer.len);
1112 for(i = 0; i < tvp->u.buffer.len; i++)
1113 dev_dbg(fe->dvb->device,
1114 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1115 __func__, i, tvp->u.buffer.data[i]);
1117 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1122 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1123 * drivers can use a single set_frontend tuning function, regardless of whether
1124 * it's being used for the legacy or new API, reducing code and complexity.
1126 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1127 struct dtv_frontend_properties *c,
1128 const struct dvb_frontend_parameters *p)
1130 c->frequency = p->frequency;
1131 c->inversion = p->inversion;
1133 switch (dvbv3_type(c->delivery_system)) {
1135 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1136 c->symbol_rate = p->u.qpsk.symbol_rate;
1137 c->fec_inner = p->u.qpsk.fec_inner;
1140 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1141 c->symbol_rate = p->u.qam.symbol_rate;
1142 c->fec_inner = p->u.qam.fec_inner;
1143 c->modulation = p->u.qam.modulation;
1146 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1148 switch (p->u.ofdm.bandwidth) {
1149 case BANDWIDTH_10_MHZ:
1150 c->bandwidth_hz = 10000000;
1152 case BANDWIDTH_8_MHZ:
1153 c->bandwidth_hz = 8000000;
1155 case BANDWIDTH_7_MHZ:
1156 c->bandwidth_hz = 7000000;
1158 case BANDWIDTH_6_MHZ:
1159 c->bandwidth_hz = 6000000;
1161 case BANDWIDTH_5_MHZ:
1162 c->bandwidth_hz = 5000000;
1164 case BANDWIDTH_1_712_MHZ:
1165 c->bandwidth_hz = 1712000;
1167 case BANDWIDTH_AUTO:
1168 c->bandwidth_hz = 0;
1171 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1172 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1173 c->modulation = p->u.ofdm.constellation;
1174 c->transmission_mode = p->u.ofdm.transmission_mode;
1175 c->guard_interval = p->u.ofdm.guard_interval;
1176 c->hierarchy = p->u.ofdm.hierarchy_information;
1179 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1180 c->modulation = p->u.vsb.modulation;
1181 if (c->delivery_system == SYS_ATSCMH)
1183 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1184 c->delivery_system = SYS_ATSC;
1186 c->delivery_system = SYS_DVBC_ANNEX_B;
1189 dev_err(fe->dvb->device,
1190 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1191 __func__, c->delivery_system);
1198 /* Ensure the cached values are set correctly in the frontend
1199 * legacy tuning structures, for the advanced tuning API.
1202 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1203 const struct dtv_frontend_properties *c,
1204 struct dvb_frontend_parameters *p)
1206 p->frequency = c->frequency;
1207 p->inversion = c->inversion;
1209 switch (dvbv3_type(c->delivery_system)) {
1211 dev_err(fe->dvb->device,
1212 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1213 __func__, c->delivery_system);
1216 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1217 p->u.qpsk.symbol_rate = c->symbol_rate;
1218 p->u.qpsk.fec_inner = c->fec_inner;
1221 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1222 p->u.qam.symbol_rate = c->symbol_rate;
1223 p->u.qam.fec_inner = c->fec_inner;
1224 p->u.qam.modulation = c->modulation;
1227 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1228 switch (c->bandwidth_hz) {
1230 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1233 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1236 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1239 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1242 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1245 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1249 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1251 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1252 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1253 p->u.ofdm.constellation = c->modulation;
1254 p->u.ofdm.transmission_mode = c->transmission_mode;
1255 p->u.ofdm.guard_interval = c->guard_interval;
1256 p->u.ofdm.hierarchy_information = c->hierarchy;
1259 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1260 p->u.vsb.modulation = c->modulation;
1267 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1268 * @fe: struct dvb_frontend pointer
1269 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1270 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1272 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1273 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1274 * If p_out is not null, it will update the DVBv3 params pointed by it.
1276 static int dtv_get_frontend(struct dvb_frontend *fe,
1277 struct dtv_frontend_properties *c,
1278 struct dvb_frontend_parameters *p_out)
1282 if (fe->ops.get_frontend) {
1283 r = fe->ops.get_frontend(fe, c);
1284 if (unlikely(r < 0))
1287 dtv_property_legacy_params_sync(fe, c, p_out);
1291 /* As everything is in cache, get_frontend fops are always supported */
1295 static int dvb_frontend_handle_ioctl(struct file *file,
1296 unsigned int cmd, void *parg);
1298 static int dtv_property_process_get(struct dvb_frontend *fe,
1299 const struct dtv_frontend_properties *c,
1300 struct dtv_property *tvp,
1306 case DTV_ENUM_DELSYS:
1308 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1309 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1312 tvp->u.buffer.len = ncaps;
1315 tvp->u.data = c->frequency;
1317 case DTV_MODULATION:
1318 tvp->u.data = c->modulation;
1320 case DTV_BANDWIDTH_HZ:
1321 tvp->u.data = c->bandwidth_hz;
1324 tvp->u.data = c->inversion;
1326 case DTV_SYMBOL_RATE:
1327 tvp->u.data = c->symbol_rate;
1330 tvp->u.data = c->fec_inner;
1333 tvp->u.data = c->pilot;
1336 tvp->u.data = c->rolloff;
1338 case DTV_DELIVERY_SYSTEM:
1339 tvp->u.data = c->delivery_system;
1342 tvp->u.data = c->voltage;
1345 tvp->u.data = c->sectone;
1347 case DTV_API_VERSION:
1348 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1350 case DTV_CODE_RATE_HP:
1351 tvp->u.data = c->code_rate_HP;
1353 case DTV_CODE_RATE_LP:
1354 tvp->u.data = c->code_rate_LP;
1356 case DTV_GUARD_INTERVAL:
1357 tvp->u.data = c->guard_interval;
1359 case DTV_TRANSMISSION_MODE:
1360 tvp->u.data = c->transmission_mode;
1363 tvp->u.data = c->hierarchy;
1365 case DTV_INTERLEAVING:
1366 tvp->u.data = c->interleaving;
1369 /* ISDB-T Support here */
1370 case DTV_ISDBT_PARTIAL_RECEPTION:
1371 tvp->u.data = c->isdbt_partial_reception;
1373 case DTV_ISDBT_SOUND_BROADCASTING:
1374 tvp->u.data = c->isdbt_sb_mode;
1376 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1377 tvp->u.data = c->isdbt_sb_subchannel;
1379 case DTV_ISDBT_SB_SEGMENT_IDX:
1380 tvp->u.data = c->isdbt_sb_segment_idx;
1382 case DTV_ISDBT_SB_SEGMENT_COUNT:
1383 tvp->u.data = c->isdbt_sb_segment_count;
1385 case DTV_ISDBT_LAYER_ENABLED:
1386 tvp->u.data = c->isdbt_layer_enabled;
1388 case DTV_ISDBT_LAYERA_FEC:
1389 tvp->u.data = c->layer[0].fec;
1391 case DTV_ISDBT_LAYERA_MODULATION:
1392 tvp->u.data = c->layer[0].modulation;
1394 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1395 tvp->u.data = c->layer[0].segment_count;
1397 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1398 tvp->u.data = c->layer[0].interleaving;
1400 case DTV_ISDBT_LAYERB_FEC:
1401 tvp->u.data = c->layer[1].fec;
1403 case DTV_ISDBT_LAYERB_MODULATION:
1404 tvp->u.data = c->layer[1].modulation;
1406 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1407 tvp->u.data = c->layer[1].segment_count;
1409 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1410 tvp->u.data = c->layer[1].interleaving;
1412 case DTV_ISDBT_LAYERC_FEC:
1413 tvp->u.data = c->layer[2].fec;
1415 case DTV_ISDBT_LAYERC_MODULATION:
1416 tvp->u.data = c->layer[2].modulation;
1418 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1419 tvp->u.data = c->layer[2].segment_count;
1421 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1422 tvp->u.data = c->layer[2].interleaving;
1425 /* Multistream support */
1427 case DTV_DVBT2_PLP_ID_LEGACY:
1428 tvp->u.data = c->stream_id;
1432 case DTV_ATSCMH_FIC_VER:
1433 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1435 case DTV_ATSCMH_PARADE_ID:
1436 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1438 case DTV_ATSCMH_NOG:
1439 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1441 case DTV_ATSCMH_TNOG:
1442 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1444 case DTV_ATSCMH_SGN:
1445 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1447 case DTV_ATSCMH_PRC:
1448 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1450 case DTV_ATSCMH_RS_FRAME_MODE:
1451 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1453 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1454 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1456 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1457 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1459 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1460 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1462 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1463 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1465 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1466 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1468 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1469 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1471 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1472 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1474 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1475 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1479 tvp->u.data = c->lna;
1482 /* Fill quality measures */
1483 case DTV_STAT_SIGNAL_STRENGTH:
1484 tvp->u.st = c->strength;
1489 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1490 tvp->u.st = c->pre_bit_error;
1492 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1493 tvp->u.st = c->pre_bit_count;
1495 case DTV_STAT_POST_ERROR_BIT_COUNT:
1496 tvp->u.st = c->post_bit_error;
1498 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1499 tvp->u.st = c->post_bit_count;
1501 case DTV_STAT_ERROR_BLOCK_COUNT:
1502 tvp->u.st = c->block_error;
1504 case DTV_STAT_TOTAL_BLOCK_COUNT:
1505 tvp->u.st = c->block_count;
1508 dev_dbg(fe->dvb->device,
1509 "%s: FE property %d doesn't exist\n",
1510 __func__, tvp->cmd);
1514 dtv_get_property_dump(fe, tvp);
1519 static int dtv_set_frontend(struct dvb_frontend *fe);
1521 static bool is_dvbv3_delsys(u32 delsys)
1525 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1526 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1532 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1533 * @fe: struct frontend;
1534 * @delsys: DVBv5 type that will be used for emulation
1536 * Provides emulation for delivery systems that are compatible with the old
1537 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1538 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1539 * parameters are compatible with DVB-S spec.
1541 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1544 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1546 c->delivery_system = delsys;
1549 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1551 if (c->delivery_system == SYS_ISDBT) {
1552 dev_dbg(fe->dvb->device,
1553 "%s: Using defaults for SYS_ISDBT\n",
1556 if (!c->bandwidth_hz)
1557 c->bandwidth_hz = 6000000;
1559 c->isdbt_partial_reception = 0;
1560 c->isdbt_sb_mode = 0;
1561 c->isdbt_sb_subchannel = 0;
1562 c->isdbt_sb_segment_idx = 0;
1563 c->isdbt_sb_segment_count = 0;
1564 c->isdbt_layer_enabled = 7;
1565 for (i = 0; i < 3; i++) {
1566 c->layer[i].fec = FEC_AUTO;
1567 c->layer[i].modulation = QAM_AUTO;
1568 c->layer[i].interleaving = 0;
1569 c->layer[i].segment_count = 0;
1572 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1573 __func__, c->delivery_system);
1579 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1580 * @fe: frontend struct
1581 * @desired_system: delivery system requested by the user
1583 * A DVBv5 call know what's the desired system it wants. So, set it.
1585 * There are, however, a few known issues with early DVBv5 applications that
1586 * are also handled by this logic:
1588 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1589 * This is an API violation, but, as we don't want to break userspace,
1590 * convert it to the first supported delivery system.
1591 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1592 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1593 * ISDB-T provided backward compat with DVB-T.
1595 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1599 u32 delsys = SYS_UNDEFINED;
1600 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1601 enum dvbv3_emulation_type type;
1604 * It was reported that some old DVBv5 applications were
1605 * filling delivery_system with SYS_UNDEFINED. If this happens,
1606 * assume that the application wants to use the first supported
1609 if (desired_system == SYS_UNDEFINED)
1610 desired_system = fe->ops.delsys[0];
1613 * This is a DVBv5 call. So, it likely knows the supported
1614 * delivery systems. So, check if the desired delivery system is
1618 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1619 if (fe->ops.delsys[ncaps] == desired_system) {
1620 c->delivery_system = desired_system;
1621 dev_dbg(fe->dvb->device,
1622 "%s: Changing delivery system to %d\n",
1623 __func__, desired_system);
1630 * The requested delivery system isn't supported. Maybe userspace
1631 * is requesting a DVBv3 compatible delivery system.
1633 * The emulation only works if the desired system is one of the
1634 * delivery systems supported by DVBv3 API
1636 if (!is_dvbv3_delsys(desired_system)) {
1637 dev_dbg(fe->dvb->device,
1638 "%s: Delivery system %d not supported.\n",
1639 __func__, desired_system);
1643 type = dvbv3_type(desired_system);
1646 * Get the last non-DVBv3 delivery system that has the same type
1647 * of the desired system
1650 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1651 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1652 delsys = fe->ops.delsys[ncaps];
1656 /* There's nothing compatible with the desired delivery system */
1657 if (delsys == SYS_UNDEFINED) {
1658 dev_dbg(fe->dvb->device,
1659 "%s: Delivery system %d not supported on emulation mode.\n",
1660 __func__, desired_system);
1664 dev_dbg(fe->dvb->device,
1665 "%s: Using delivery system %d emulated as if it were %d\n",
1666 __func__, delsys, desired_system);
1668 return emulate_delivery_system(fe, desired_system);
1672 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1673 * @fe: frontend struct
1675 * A DVBv3 call doesn't know what's the desired system it wants. It also
1676 * doesn't allow to switch between different types. Due to that, userspace
1677 * should use DVBv5 instead.
1678 * However, in order to avoid breaking userspace API, limited backward
1679 * compatibility support is provided.
1681 * There are some delivery systems that are incompatible with DVBv3 calls.
1683 * This routine should work fine for frontends that support just one delivery
1686 * For frontends that support multiple frontends:
1687 * 1) It defaults to use the first supported delivery system. There's an
1688 * userspace application that allows changing it at runtime;
1690 * 2) If the current delivery system is not compatible with DVBv3, it gets
1691 * the first one that it is compatible.
1693 * NOTE: in order for this to work with applications like Kaffeine that
1694 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1695 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1696 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1699 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1702 u32 delsys = SYS_UNDEFINED;
1703 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1705 /* If not set yet, defaults to the first supported delivery system */
1706 if (c->delivery_system == SYS_UNDEFINED)
1707 c->delivery_system = fe->ops.delsys[0];
1710 * Trivial case: just use the current one, if it already a DVBv3
1713 if (is_dvbv3_delsys(c->delivery_system)) {
1714 dev_dbg(fe->dvb->device,
1715 "%s: Using delivery system to %d\n",
1716 __func__, c->delivery_system);
1721 * Seek for the first delivery system that it is compatible with a
1725 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1726 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1727 delsys = fe->ops.delsys[ncaps];
1732 if (delsys == SYS_UNDEFINED) {
1733 dev_dbg(fe->dvb->device,
1734 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1738 return emulate_delivery_system(fe, delsys);
1742 * dtv_property_process_set - Sets a single DTV property
1743 * @fe: Pointer to &struct dvb_frontend
1744 * @file: Pointer to &struct file
1745 * @cmd: Digital TV command
1746 * @data: An unsigned 32-bits number
1748 * This routine assigns the property
1749 * value to the corresponding member of
1750 * &struct dtv_frontend_properties
1753 * Zero on success, negative errno on failure.
1755 static int dtv_property_process_set(struct dvb_frontend *fe,
1760 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1762 /** Dump DTV command name and value*/
1763 if (!cmd || cmd > DTV_MAX_COMMAND)
1764 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n",
1767 dev_dbg(fe->dvb->device,
1768 "%s: SET cmd 0x%08x (%s) to 0x%08x\n",
1769 __func__, cmd, dtv_cmds[cmd].name, data);
1773 * Reset a cache of data specific to the frontend here. This does
1774 * not effect hardware.
1776 dvb_frontend_clear_cache(fe);
1780 * Use the cached Digital TV properties to tune the
1783 dev_dbg(fe->dvb->device,
1784 "%s: Setting the frontend from property cache\n",
1787 r = dtv_set_frontend(fe);
1790 c->frequency = data;
1792 case DTV_MODULATION:
1793 c->modulation = data;
1795 case DTV_BANDWIDTH_HZ:
1796 c->bandwidth_hz = data;
1799 c->inversion = data;
1801 case DTV_SYMBOL_RATE:
1802 c->symbol_rate = data;
1805 c->fec_inner = data;
1813 case DTV_DELIVERY_SYSTEM:
1814 r = dvbv5_set_delivery_system(fe, data);
1818 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
1819 (void *)c->voltage);
1823 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
1824 (void *)c->sectone);
1826 case DTV_CODE_RATE_HP:
1827 c->code_rate_HP = data;
1829 case DTV_CODE_RATE_LP:
1830 c->code_rate_LP = data;
1832 case DTV_GUARD_INTERVAL:
1833 c->guard_interval = data;
1835 case DTV_TRANSMISSION_MODE:
1836 c->transmission_mode = data;
1839 c->hierarchy = data;
1841 case DTV_INTERLEAVING:
1842 c->interleaving = data;
1845 /* ISDB-T Support here */
1846 case DTV_ISDBT_PARTIAL_RECEPTION:
1847 c->isdbt_partial_reception = data;
1849 case DTV_ISDBT_SOUND_BROADCASTING:
1850 c->isdbt_sb_mode = data;
1852 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1853 c->isdbt_sb_subchannel = data;
1855 case DTV_ISDBT_SB_SEGMENT_IDX:
1856 c->isdbt_sb_segment_idx = data;
1858 case DTV_ISDBT_SB_SEGMENT_COUNT:
1859 c->isdbt_sb_segment_count = data;
1861 case DTV_ISDBT_LAYER_ENABLED:
1862 c->isdbt_layer_enabled = data;
1864 case DTV_ISDBT_LAYERA_FEC:
1865 c->layer[0].fec = data;
1867 case DTV_ISDBT_LAYERA_MODULATION:
1868 c->layer[0].modulation = data;
1870 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1871 c->layer[0].segment_count = data;
1873 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1874 c->layer[0].interleaving = data;
1876 case DTV_ISDBT_LAYERB_FEC:
1877 c->layer[1].fec = data;
1879 case DTV_ISDBT_LAYERB_MODULATION:
1880 c->layer[1].modulation = data;
1882 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1883 c->layer[1].segment_count = data;
1885 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1886 c->layer[1].interleaving = data;
1888 case DTV_ISDBT_LAYERC_FEC:
1889 c->layer[2].fec = data;
1891 case DTV_ISDBT_LAYERC_MODULATION:
1892 c->layer[2].modulation = data;
1894 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1895 c->layer[2].segment_count = data;
1897 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1898 c->layer[2].interleaving = data;
1901 /* Multistream support */
1903 case DTV_DVBT2_PLP_ID_LEGACY:
1904 c->stream_id = data;
1908 case DTV_ATSCMH_PARADE_ID:
1909 fe->dtv_property_cache.atscmh_parade_id = data;
1911 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1912 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data;
1917 if (fe->ops.set_lna)
1918 r = fe->ops.set_lna(fe);
1930 static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd,
1933 struct dvb_device *dvbdev = file->private_data;
1934 struct dvb_frontend *fe = dvbdev->priv;
1935 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1938 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1939 if (down_interruptible(&fepriv->sem))
1940 return -ERESTARTSYS;
1942 if (fe->exit != DVB_FE_NO_EXIT) {
1948 * If the frontend is opened in read-only mode, only the ioctls
1949 * that don't interfere with the tune logic should be accepted.
1950 * That allows an external application to monitor the DVB QoS and
1951 * statistics parameters.
1953 * That matches all _IOR() ioctls, except for two special cases:
1954 * - FE_GET_EVENT is part of the tuning logic on a DVB application;
1955 * - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0
1957 * So, those two ioctls should also return -EPERM, as otherwise
1958 * reading from them would interfere with a DVB tune application
1960 if ((file->f_flags & O_ACCMODE) == O_RDONLY
1961 && (_IOC_DIR(cmd) != _IOC_READ
1962 || cmd == FE_GET_EVENT
1963 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1968 err = dvb_frontend_handle_ioctl(file, cmd, parg);
1974 static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
1977 struct dvb_device *dvbdev = file->private_data;
1982 return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
1985 #ifdef CONFIG_COMPAT
1986 struct compat_dtv_property {
1991 struct dtv_fe_stats st;
1996 compat_uptr_t reserved2;
2000 } __attribute__ ((packed));
2002 struct compat_dtv_properties {
2004 compat_uptr_t props;
2007 #define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties)
2008 #define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties)
2010 static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd,
2013 struct dvb_device *dvbdev = file->private_data;
2014 struct dvb_frontend *fe = dvbdev->priv;
2015 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2018 if (cmd == COMPAT_FE_SET_PROPERTY) {
2019 struct compat_dtv_properties prop, *tvps = NULL;
2020 struct compat_dtv_property *tvp = NULL;
2022 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2028 * Put an arbitrary limit on the number of messages that can
2031 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2034 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2036 return PTR_ERR(tvp);
2038 for (i = 0; i < tvps->num; i++) {
2039 err = dtv_property_process_set(fe, file,
2048 } else if (cmd == COMPAT_FE_GET_PROPERTY) {
2049 struct compat_dtv_properties prop, *tvps = NULL;
2050 struct compat_dtv_property *tvp = NULL;
2051 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2053 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2059 * Put an arbitrary limit on the number of messages that can
2062 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2065 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2067 return PTR_ERR(tvp);
2070 * Let's use our own copy of property cache, in order to
2071 * avoid mangling with DTV zigzag logic, as drivers might
2072 * return crap, if they don't check if the data is available
2073 * before updating the properties cache.
2075 if (fepriv->state != FESTATE_IDLE) {
2076 err = dtv_get_frontend(fe, &getp, NULL);
2082 for (i = 0; i < tvps->num; i++) {
2083 err = dtv_property_process_get(
2084 fe, &getp, (struct dtv_property *)(tvp + i), file);
2091 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp,
2092 tvps->num * sizeof(struct compat_dtv_property))) {
2102 static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd,
2105 struct dvb_device *dvbdev = file->private_data;
2106 struct dvb_frontend *fe = dvbdev->priv;
2107 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2110 if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) {
2111 if (down_interruptible(&fepriv->sem))
2112 return -ERESTARTSYS;
2114 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg);
2120 return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2124 static int dtv_set_frontend(struct dvb_frontend *fe)
2126 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2127 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2128 struct dvb_frontend_tune_settings fetunesettings;
2131 if (dvb_frontend_check_parameters(fe) < 0)
2135 * Initialize output parameters to match the values given by
2136 * the user. FE_SET_FRONTEND triggers an initial frontend event
2137 * with status = 0, which copies output parameters to userspace.
2139 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2142 * Be sure that the bandwidth will be filled for all
2143 * non-satellite systems, as tuners need to know what
2144 * low pass/Nyquist half filter should be applied, in
2145 * order to avoid inter-channel noise.
2147 * ISDB-T and DVB-T/T2 already sets bandwidth.
2148 * ATSC and DVB-C don't set, so, the core should fill it.
2150 * On DVB-C Annex A and C, the bandwidth is a function of
2151 * the roll-off and symbol rate. Annex B defines different
2152 * roll-off factors depending on the modulation. Fortunately,
2153 * Annex B is only used with 6MHz, so there's no need to
2156 * While not officially supported, a side effect of handling it at
2157 * the cache level is that a program could retrieve the bandwidth
2158 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2160 switch (c->delivery_system) {
2162 case SYS_DVBC_ANNEX_B:
2163 c->bandwidth_hz = 6000000;
2165 case SYS_DVBC_ANNEX_A:
2168 case SYS_DVBC_ANNEX_C:
2177 switch (c->rolloff) {
2193 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2195 /* force auto frequency inversion if requested */
2196 if (dvb_force_auto_inversion)
2197 c->inversion = INVERSION_AUTO;
2200 * without hierarchical coding code_rate_LP is irrelevant,
2201 * so we tolerate the otherwise invalid FEC_NONE setting
2203 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2204 c->code_rate_LP = FEC_AUTO;
2206 /* get frontend-specific tuning settings */
2207 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2208 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2209 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2210 fepriv->max_drift = fetunesettings.max_drift;
2211 fepriv->step_size = fetunesettings.step_size;
2213 /* default values */
2214 switch (c->delivery_system) {
2219 case SYS_DVBC_ANNEX_A:
2220 case SYS_DVBC_ANNEX_C:
2221 fepriv->min_delay = HZ / 20;
2222 fepriv->step_size = c->symbol_rate / 16000;
2223 fepriv->max_drift = c->symbol_rate / 2000;
2229 fepriv->min_delay = HZ / 20;
2230 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2231 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2235 * FIXME: This sounds wrong! if freqency_stepsize is
2236 * defined by the frontend, why not use it???
2238 fepriv->min_delay = HZ / 20;
2239 fepriv->step_size = 0; /* no zigzag */
2240 fepriv->max_drift = 0;
2244 if (dvb_override_tune_delay > 0)
2245 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2247 fepriv->state = FESTATE_RETUNE;
2249 /* Request the search algorithm to search */
2250 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2252 dvb_frontend_clear_events(fe);
2253 dvb_frontend_add_event(fe, 0);
2254 dvb_frontend_wakeup(fe);
2261 static int dvb_frontend_handle_ioctl(struct file *file,
2262 unsigned int cmd, void *parg)
2264 struct dvb_device *dvbdev = file->private_data;
2265 struct dvb_frontend *fe = dvbdev->priv;
2266 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2267 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2268 int i, err = -ENOTSUPP;
2270 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2273 case FE_SET_PROPERTY: {
2274 struct dtv_properties *tvps = parg;
2275 struct dtv_property *tvp = NULL;
2277 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2278 __func__, tvps->num);
2279 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2280 __func__, tvps->props);
2283 * Put an arbitrary limit on the number of messages that can
2286 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2289 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2291 return PTR_ERR(tvp);
2293 for (i = 0; i < tvps->num; i++) {
2294 err = dtv_property_process_set(fe, file,
2306 case FE_GET_PROPERTY: {
2307 struct dtv_properties *tvps = parg;
2308 struct dtv_property *tvp = NULL;
2309 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2311 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2312 __func__, tvps->num);
2313 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2314 __func__, tvps->props);
2317 * Put an arbitrary limit on the number of messages that can
2320 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2323 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2325 return PTR_ERR(tvp);
2328 * Let's use our own copy of property cache, in order to
2329 * avoid mangling with DTV zigzag logic, as drivers might
2330 * return crap, if they don't check if the data is available
2331 * before updating the properties cache.
2333 if (fepriv->state != FESTATE_IDLE) {
2334 err = dtv_get_frontend(fe, &getp, NULL);
2340 for (i = 0; i < tvps->num; i++) {
2341 err = dtv_property_process_get(fe, &getp, tvp + i, file);
2348 if (copy_to_user((void __user *)tvps->props, tvp,
2349 tvps->num * sizeof(struct dtv_property))) {
2359 struct dvb_frontend_info* info = parg;
2361 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2362 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2365 * Associate the 4 delivery systems supported by DVBv3
2366 * API with their DVBv5 counterpart. For the other standards,
2367 * use the closest type, assuming that it would hopefully
2368 * work with a DVBv3 application.
2369 * It should be noticed that, on multi-frontend devices with
2370 * different types (terrestrial and cable, for example),
2371 * a pure DVBv3 application won't be able to use all delivery
2372 * systems. Yet, changing the DVBv5 cache to the other delivery
2373 * system should be enough for making it work.
2375 switch (dvbv3_type(c->delivery_system)) {
2377 info->type = FE_QPSK;
2380 info->type = FE_ATSC;
2383 info->type = FE_QAM;
2386 info->type = FE_OFDM;
2389 dev_err(fe->dvb->device,
2390 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2391 __func__, c->delivery_system);
2392 fe->ops.info.type = FE_OFDM;
2394 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2395 __func__, c->delivery_system, fe->ops.info.type);
2397 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2398 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2399 info->caps |= FE_CAN_INVERSION_AUTO;
2404 case FE_READ_STATUS: {
2405 enum fe_status *status = parg;
2407 /* if retune was requested but hasn't occurred yet, prevent
2408 * that user get signal state from previous tuning */
2409 if (fepriv->state == FESTATE_RETUNE ||
2410 fepriv->state == FESTATE_ERROR) {
2416 if (fe->ops.read_status)
2417 err = fe->ops.read_status(fe, status);
2421 case FE_DISEQC_RESET_OVERLOAD:
2422 if (fe->ops.diseqc_reset_overload) {
2423 err = fe->ops.diseqc_reset_overload(fe);
2424 fepriv->state = FESTATE_DISEQC;
2429 case FE_DISEQC_SEND_MASTER_CMD:
2430 if (fe->ops.diseqc_send_master_cmd) {
2431 struct dvb_diseqc_master_cmd *cmd = parg;
2433 if (cmd->msg_len > sizeof(cmd->msg)) {
2437 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2438 fepriv->state = FESTATE_DISEQC;
2443 case FE_DISEQC_SEND_BURST:
2444 if (fe->ops.diseqc_send_burst) {
2445 err = fe->ops.diseqc_send_burst(fe,
2446 (enum fe_sec_mini_cmd)parg);
2447 fepriv->state = FESTATE_DISEQC;
2453 if (fe->ops.set_tone) {
2454 err = fe->ops.set_tone(fe,
2455 (enum fe_sec_tone_mode)parg);
2456 fepriv->tone = (enum fe_sec_tone_mode)parg;
2457 fepriv->state = FESTATE_DISEQC;
2462 case FE_SET_VOLTAGE:
2463 if (fe->ops.set_voltage) {
2464 err = fe->ops.set_voltage(fe,
2465 (enum fe_sec_voltage)parg);
2466 fepriv->voltage = (enum fe_sec_voltage)parg;
2467 fepriv->state = FESTATE_DISEQC;
2472 case FE_DISEQC_RECV_SLAVE_REPLY:
2473 if (fe->ops.diseqc_recv_slave_reply)
2474 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2477 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2478 if (fe->ops.enable_high_lnb_voltage)
2479 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2482 case FE_SET_FRONTEND_TUNE_MODE:
2483 fepriv->tune_mode_flags = (unsigned long) parg;
2487 /* DEPRECATED dish control ioctls */
2489 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2490 if (fe->ops.dishnetwork_send_legacy_command) {
2491 err = fe->ops.dishnetwork_send_legacy_command(fe,
2492 (unsigned long)parg);
2493 fepriv->state = FESTATE_DISEQC;
2495 } else if (fe->ops.set_voltage) {
2497 * NOTE: This is a fallback condition. Some frontends
2498 * (stv0299 for instance) take longer than 8msec to
2499 * respond to a set_voltage command. Those switches
2500 * need custom routines to switch properly. For all
2501 * other frontends, the following should work ok.
2502 * Dish network legacy switches (as used by Dish500)
2503 * are controlled by sending 9-bit command words
2504 * spaced 8msec apart.
2505 * the actual command word is switch/port dependent
2506 * so it is up to the userspace application to send
2507 * the right command.
2508 * The command must always start with a '0' after
2509 * initialization, so parg is 8 bits and does not
2510 * include the initialization or start bit
2512 unsigned long swcmd = ((unsigned long) parg) << 1;
2517 if (dvb_frontend_debug)
2518 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2519 nexttime = ktime_get_boottime();
2520 if (dvb_frontend_debug)
2522 /* before sending a command, initialize by sending
2523 * a 32ms 18V to the switch
2525 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2526 dvb_frontend_sleep_until(&nexttime, 32000);
2528 for (i = 0; i < 9; i++) {
2529 if (dvb_frontend_debug)
2530 tv[i+1] = ktime_get_boottime();
2531 if ((swcmd & 0x01) != last) {
2532 /* set voltage to (last ? 13V : 18V) */
2533 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2534 last = (last) ? 0 : 1;
2538 dvb_frontend_sleep_until(&nexttime, 8000);
2540 if (dvb_frontend_debug) {
2541 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2542 __func__, fe->dvb->num);
2543 for (i = 1; i < 10; i++)
2544 printk("%d: %d\n", i,
2545 (int) ktime_us_delta(tv[i], tv[i-1]));
2548 fepriv->state = FESTATE_DISEQC;
2553 /* DEPRECATED statistics ioctls */
2556 if (fe->ops.read_ber) {
2558 err = fe->ops.read_ber(fe, (__u32 *) parg);
2564 case FE_READ_SIGNAL_STRENGTH:
2565 if (fe->ops.read_signal_strength) {
2567 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2574 if (fe->ops.read_snr) {
2576 err = fe->ops.read_snr(fe, (__u16 *) parg);
2582 case FE_READ_UNCORRECTED_BLOCKS:
2583 if (fe->ops.read_ucblocks) {
2585 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2591 /* DEPRECATED DVBv3 ioctls */
2593 case FE_SET_FRONTEND:
2594 err = dvbv3_set_delivery_system(fe);
2598 err = dtv_property_cache_sync(fe, c, parg);
2601 err = dtv_set_frontend(fe);
2604 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2607 case FE_GET_FRONTEND: {
2608 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2611 * Let's use our own copy of property cache, in order to
2612 * avoid mangling with DTV zigzag logic, as drivers might
2613 * return crap, if they don't check if the data is available
2614 * before updating the properties cache.
2616 err = dtv_get_frontend(fe, &getp, parg);
2628 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2630 struct dvb_device *dvbdev = file->private_data;
2631 struct dvb_frontend *fe = dvbdev->priv;
2632 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2634 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2636 poll_wait (file, &fepriv->events.wait_queue, wait);
2638 if (fepriv->events.eventw != fepriv->events.eventr)
2639 return (POLLIN | POLLRDNORM | POLLPRI);
2644 static int dvb_frontend_open(struct inode *inode, struct file *file)
2646 struct dvb_device *dvbdev = file->private_data;
2647 struct dvb_frontend *fe = dvbdev->priv;
2648 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2649 struct dvb_adapter *adapter = fe->dvb;
2652 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2653 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2656 if (adapter->mfe_shared) {
2657 mutex_lock (&adapter->mfe_lock);
2659 if (adapter->mfe_dvbdev == NULL)
2660 adapter->mfe_dvbdev = dvbdev;
2662 else if (adapter->mfe_dvbdev != dvbdev) {
2664 *mfedev = adapter->mfe_dvbdev;
2666 *mfe = mfedev->priv;
2667 struct dvb_frontend_private
2668 *mfepriv = mfe->frontend_priv;
2669 int mferetry = (dvb_mfe_wait_time << 1);
2671 mutex_unlock (&adapter->mfe_lock);
2672 while (mferetry-- && (mfedev->users != -1 ||
2673 mfepriv->thread != NULL)) {
2674 if(msleep_interruptible(500)) {
2675 if(signal_pending(current))
2680 mutex_lock (&adapter->mfe_lock);
2681 if(adapter->mfe_dvbdev != dvbdev) {
2682 mfedev = adapter->mfe_dvbdev;
2684 mfepriv = mfe->frontend_priv;
2685 if (mfedev->users != -1 ||
2686 mfepriv->thread != NULL) {
2687 mutex_unlock (&adapter->mfe_lock);
2690 adapter->mfe_dvbdev = dvbdev;
2695 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2696 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2699 /* If we took control of the bus, we need to force
2700 reinitialization. This is because many ts_bus_ctrl()
2701 functions strobe the RESET pin on the demod, and if the
2702 frontend thread already exists then the dvb_init() routine
2703 won't get called (which is what usually does initial
2704 register configuration). */
2705 fepriv->reinitialise = 1;
2708 if ((ret = dvb_generic_open (inode, file)) < 0)
2711 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2712 /* normal tune mode when opened R/W */
2713 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2715 fepriv->voltage = -1;
2717 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2718 if (fe->dvb->mdev && fe->dvb->mdev->enable_source) {
2719 ret = fe->dvb->mdev->enable_source(dvbdev->entity,
2722 dev_err(fe->dvb->device,
2723 "Tuner is busy. Error %d\n", ret);
2728 ret = dvb_frontend_start (fe);
2732 /* empty event queue */
2733 fepriv->events.eventr = fepriv->events.eventw = 0;
2736 dvb_frontend_private_get(fepriv);
2738 if (adapter->mfe_shared)
2739 mutex_unlock (&adapter->mfe_lock);
2743 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2744 if (fe->dvb->mdev && fe->dvb->mdev->disable_source)
2745 fe->dvb->mdev->disable_source(dvbdev->entity);
2748 dvb_generic_release(inode, file);
2750 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2751 fe->ops.ts_bus_ctrl(fe, 0);
2753 if (adapter->mfe_shared)
2754 mutex_unlock (&adapter->mfe_lock);
2758 static int dvb_frontend_release(struct inode *inode, struct file *file)
2760 struct dvb_device *dvbdev = file->private_data;
2761 struct dvb_frontend *fe = dvbdev->priv;
2762 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2765 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2767 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2768 fepriv->release_jiffies = jiffies;
2772 ret = dvb_generic_release (inode, file);
2774 if (dvbdev->users == -1) {
2775 wake_up(&fepriv->wait_queue);
2776 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2777 if (fe->dvb->mdev && fe->dvb->mdev->disable_source)
2778 fe->dvb->mdev->disable_source(dvbdev->entity);
2780 if (fe->exit != DVB_FE_NO_EXIT)
2781 wake_up(&dvbdev->wait_queue);
2782 if (fe->ops.ts_bus_ctrl)
2783 fe->ops.ts_bus_ctrl(fe, 0);
2786 dvb_frontend_private_put(fepriv);
2791 static const struct file_operations dvb_frontend_fops = {
2792 .owner = THIS_MODULE,
2793 .unlocked_ioctl = dvb_frontend_ioctl,
2794 #ifdef CONFIG_COMPAT
2795 .compat_ioctl = dvb_frontend_compat_ioctl,
2797 .poll = dvb_frontend_poll,
2798 .open = dvb_frontend_open,
2799 .release = dvb_frontend_release,
2800 .llseek = noop_llseek,
2803 int dvb_frontend_suspend(struct dvb_frontend *fe)
2807 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2810 if (fe->ops.tuner_ops.suspend)
2811 ret = fe->ops.tuner_ops.suspend(fe);
2812 else if (fe->ops.tuner_ops.sleep)
2813 ret = fe->ops.tuner_ops.sleep(fe);
2816 ret = fe->ops.sleep(fe);
2820 EXPORT_SYMBOL(dvb_frontend_suspend);
2822 int dvb_frontend_resume(struct dvb_frontend *fe)
2824 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2827 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2830 fe->exit = DVB_FE_DEVICE_RESUME;
2832 ret = fe->ops.init(fe);
2834 if (fe->ops.tuner_ops.resume)
2835 ret = fe->ops.tuner_ops.resume(fe);
2836 else if (fe->ops.tuner_ops.init)
2837 ret = fe->ops.tuner_ops.init(fe);
2839 if (fe->ops.set_tone && fepriv->tone != -1)
2840 fe->ops.set_tone(fe, fepriv->tone);
2841 if (fe->ops.set_voltage && fepriv->voltage != -1)
2842 fe->ops.set_voltage(fe, fepriv->voltage);
2844 fe->exit = DVB_FE_NO_EXIT;
2845 fepriv->state = FESTATE_RETUNE;
2846 dvb_frontend_wakeup(fe);
2850 EXPORT_SYMBOL(dvb_frontend_resume);
2852 int dvb_register_frontend(struct dvb_adapter* dvb,
2853 struct dvb_frontend* fe)
2855 struct dvb_frontend_private *fepriv;
2856 const struct dvb_device dvbdev_template = {
2860 .fops = &dvb_frontend_fops,
2861 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2862 .name = fe->ops.info.name,
2866 dev_dbg(dvb->device, "%s:\n", __func__);
2868 if (mutex_lock_interruptible(&frontend_mutex))
2869 return -ERESTARTSYS;
2871 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2872 if (fe->frontend_priv == NULL) {
2873 mutex_unlock(&frontend_mutex);
2876 fepriv = fe->frontend_priv;
2878 kref_init(&fepriv->refcount);
2880 sema_init(&fepriv->sem, 1);
2881 init_waitqueue_head (&fepriv->wait_queue);
2882 init_waitqueue_head (&fepriv->events.wait_queue);
2883 mutex_init(&fepriv->events.mtx);
2885 fepriv->inversion = INVERSION_OFF;
2887 dev_info(fe->dvb->device,
2888 "DVB: registering adapter %i frontend %i (%s)...\n",
2889 fe->dvb->num, fe->id, fe->ops.info.name);
2891 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2892 fe, DVB_DEVICE_FRONTEND, 0);
2895 * Initialize the cache to the proper values according with the
2896 * first supported delivery system (ops->delsys[0])
2899 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2900 dvb_frontend_clear_cache(fe);
2902 mutex_unlock(&frontend_mutex);
2905 EXPORT_SYMBOL(dvb_register_frontend);
2907 int dvb_unregister_frontend(struct dvb_frontend* fe)
2909 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2910 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2912 mutex_lock(&frontend_mutex);
2913 dvb_frontend_stop (fe);
2914 dvb_unregister_device (fepriv->dvbdev);
2916 /* fe is invalid now */
2917 mutex_unlock(&frontend_mutex);
2918 dvb_frontend_private_put(fepriv);
2921 EXPORT_SYMBOL(dvb_unregister_frontend);
2923 #ifdef CONFIG_MEDIA_ATTACH
2924 void dvb_frontend_detach(struct dvb_frontend* fe)
2928 if (fe->ops.release_sec) {
2929 fe->ops.release_sec(fe);
2930 dvb_detach(fe->ops.release_sec);
2932 if (fe->ops.tuner_ops.release) {
2933 fe->ops.tuner_ops.release(fe);
2934 dvb_detach(fe->ops.tuner_ops.release);
2936 if (fe->ops.analog_ops.release) {
2937 fe->ops.analog_ops.release(fe);
2938 dvb_detach(fe->ops.analog_ops.release);
2940 ptr = (void*)fe->ops.release;
2942 fe->ops.release(fe);
2947 void dvb_frontend_detach(struct dvb_frontend* fe)
2949 if (fe->ops.release_sec)
2950 fe->ops.release_sec(fe);
2951 if (fe->ops.tuner_ops.release)
2952 fe->ops.tuner_ops.release(fe);
2953 if (fe->ops.analog_ops.release)
2954 fe->ops.analog_ops.release(fe);
2955 if (fe->ops.release)
2956 fe->ops.release(fe);
2959 EXPORT_SYMBOL(dvb_frontend_detach);