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 #include <linux/string.h>
29 #include <linux/kernel.h>
30 #include <linux/sched.h>
31 #include <linux/wait.h>
32 #include <linux/slab.h>
33 #include <linux/poll.h>
34 #include <linux/semaphore.h>
35 #include <linux/module.h>
36 #include <linux/list.h>
37 #include <linux/freezer.h>
38 #include <linux/jiffies.h>
39 #include <linux/kthread.h>
40 #include <asm/processor.h>
42 #include "dvb_frontend.h"
44 #include <linux/dvb/version.h>
46 static int dvb_frontend_debug;
47 static int dvb_shutdown_timeout;
48 static int dvb_force_auto_inversion;
49 static int dvb_override_tune_delay;
50 static int dvb_powerdown_on_sleep = 1;
51 static int dvb_mfe_wait_time = 5;
53 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
54 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
55 module_param(dvb_shutdown_timeout, int, 0644);
56 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
57 module_param(dvb_force_auto_inversion, int, 0644);
58 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
59 module_param(dvb_override_tune_delay, int, 0644);
60 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
61 module_param(dvb_powerdown_on_sleep, int, 0644);
62 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
63 module_param(dvb_mfe_wait_time, int, 0644);
64 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)");
66 #define dprintk if (dvb_frontend_debug) printk
68 #define FESTATE_IDLE 1
69 #define FESTATE_RETUNE 2
70 #define FESTATE_TUNING_FAST 4
71 #define FESTATE_TUNING_SLOW 8
72 #define FESTATE_TUNED 16
73 #define FESTATE_ZIGZAG_FAST 32
74 #define FESTATE_ZIGZAG_SLOW 64
75 #define FESTATE_DISEQC 128
76 #define FESTATE_ERROR 256
77 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
78 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
79 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
80 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
84 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
85 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
86 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
87 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
88 * FESTATE_TUNED. The frontend has successfully locked on.
89 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
90 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
91 * FESTATE_DISEQC. A DISEQC command has just been issued.
92 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
93 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
94 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
95 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
98 #define DVB_FE_NO_EXIT 0
99 #define DVB_FE_NORMAL_EXIT 1
100 #define DVB_FE_DEVICE_REMOVED 2
102 static DEFINE_MUTEX(frontend_mutex);
104 struct dvb_frontend_private {
106 /* thread/frontend values */
107 struct dvb_device *dvbdev;
108 struct dvb_frontend_parameters parameters;
109 struct dvb_fe_events events;
110 struct semaphore sem;
111 struct list_head list_head;
112 wait_queue_head_t wait_queue;
113 struct task_struct *thread;
114 unsigned long release_jiffies;
118 unsigned long tune_mode_flags;
120 unsigned int reinitialise;
124 /* swzigzag values */
126 unsigned int bending;
128 unsigned int inversion;
129 unsigned int auto_step;
130 unsigned int auto_sub_step;
131 unsigned int started_auto_step;
132 unsigned int min_delay;
133 unsigned int max_drift;
134 unsigned int step_size;
136 unsigned int check_wrapped;
137 enum dvbfe_search algo_status;
140 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
142 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
144 struct dvb_frontend_private *fepriv = fe->frontend_priv;
145 struct dvb_fe_events *events = &fepriv->events;
146 struct dvb_frontend_event *e;
149 dprintk ("%s\n", __func__);
151 if (mutex_lock_interruptible (&events->mtx))
154 wp = (events->eventw + 1) % MAX_EVENT;
156 if (wp == events->eventr) {
157 events->overflow = 1;
158 events->eventr = (events->eventr + 1) % MAX_EVENT;
161 e = &events->events[events->eventw];
163 memcpy (&e->parameters, &fepriv->parameters,
164 sizeof (struct dvb_frontend_parameters));
166 if (status & FE_HAS_LOCK)
167 if (fe->ops.get_frontend)
168 fe->ops.get_frontend(fe, &e->parameters);
172 mutex_unlock(&events->mtx);
176 wake_up_interruptible (&events->wait_queue);
179 static int dvb_frontend_get_event(struct dvb_frontend *fe,
180 struct dvb_frontend_event *event, int flags)
182 struct dvb_frontend_private *fepriv = fe->frontend_priv;
183 struct dvb_fe_events *events = &fepriv->events;
185 dprintk ("%s\n", __func__);
187 if (events->overflow) {
188 events->overflow = 0;
192 if (events->eventw == events->eventr) {
195 if (flags & O_NONBLOCK)
200 ret = wait_event_interruptible (events->wait_queue,
201 events->eventw != events->eventr);
203 if (down_interruptible (&fepriv->sem))
210 if (mutex_lock_interruptible (&events->mtx))
213 memcpy (event, &events->events[events->eventr],
214 sizeof(struct dvb_frontend_event));
216 events->eventr = (events->eventr + 1) % MAX_EVENT;
218 mutex_unlock(&events->mtx);
223 static void dvb_frontend_init(struct dvb_frontend *fe)
225 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
232 if (fe->ops.tuner_ops.init) {
233 if (fe->ops.i2c_gate_ctrl)
234 fe->ops.i2c_gate_ctrl(fe, 1);
235 fe->ops.tuner_ops.init(fe);
236 if (fe->ops.i2c_gate_ctrl)
237 fe->ops.i2c_gate_ctrl(fe, 0);
241 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
243 struct dvb_frontend_private *fepriv = fe->frontend_priv;
245 fepriv->reinitialise = 1;
246 dvb_frontend_wakeup(fe);
248 EXPORT_SYMBOL(dvb_frontend_reinitialise);
250 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
254 dprintk ("%s\n", __func__);
257 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
259 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
261 q2 = fepriv->quality - 128;
264 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
268 * Performs automatic twiddling of frontend parameters.
270 * @param fe The frontend concerned.
271 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
272 * @returns Number of complete iterations that have been performed.
274 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
279 struct dvb_frontend_private *fepriv = fe->frontend_priv;
280 int original_inversion = fepriv->parameters.inversion;
281 u32 original_frequency = fepriv->parameters.frequency;
283 /* are we using autoinversion? */
284 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
285 (fepriv->parameters.inversion == INVERSION_AUTO));
287 /* setup parameters correctly */
289 /* calculate the lnb_drift */
290 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
292 /* wrap the auto_step if we've exceeded the maximum drift */
293 if (fepriv->lnb_drift > fepriv->max_drift) {
294 fepriv->auto_step = 0;
295 fepriv->auto_sub_step = 0;
296 fepriv->lnb_drift = 0;
299 /* perform inversion and +/- zigzag */
300 switch(fepriv->auto_sub_step) {
302 /* try with the current inversion and current drift setting */
307 if (!autoinversion) break;
309 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
314 if (fepriv->lnb_drift == 0) break;
316 fepriv->lnb_drift = -fepriv->lnb_drift;
321 if (fepriv->lnb_drift == 0) break;
322 if (!autoinversion) break;
324 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
325 fepriv->lnb_drift = -fepriv->lnb_drift;
331 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
335 if (!ready) fepriv->auto_sub_step++;
338 /* if this attempt would hit where we started, indicate a complete
339 * iteration has occurred */
340 if ((fepriv->auto_step == fepriv->started_auto_step) &&
341 (fepriv->auto_sub_step == 0) && check_wrapped) {
345 dprintk("%s: drift:%i inversion:%i auto_step:%i "
346 "auto_sub_step:%i started_auto_step:%i\n",
347 __func__, fepriv->lnb_drift, fepriv->inversion,
348 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
350 /* set the frontend itself */
351 fepriv->parameters.frequency += fepriv->lnb_drift;
353 fepriv->parameters.inversion = fepriv->inversion;
354 if (fe->ops.set_frontend)
355 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
356 if (fe_set_err < 0) {
357 fepriv->state = FESTATE_ERROR;
361 fepriv->parameters.frequency = original_frequency;
362 fepriv->parameters.inversion = original_inversion;
364 fepriv->auto_sub_step++;
368 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
372 struct dvb_frontend_private *fepriv = fe->frontend_priv;
374 /* if we've got no parameters, just keep idling */
375 if (fepriv->state & FESTATE_IDLE) {
376 fepriv->delay = 3*HZ;
381 /* in SCAN mode, we just set the frontend when asked and leave it alone */
382 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
383 if (fepriv->state & FESTATE_RETUNE) {
384 if (fe->ops.set_frontend)
385 retval = fe->ops.set_frontend(fe,
386 &fepriv->parameters);
388 fepriv->state = FESTATE_ERROR;
390 fepriv->state = FESTATE_TUNED;
392 fepriv->delay = 3*HZ;
397 /* get the frontend status */
398 if (fepriv->state & FESTATE_RETUNE) {
401 if (fe->ops.read_status)
402 fe->ops.read_status(fe, &s);
403 if (s != fepriv->status) {
404 dvb_frontend_add_event(fe, s);
409 /* if we're not tuned, and we have a lock, move to the TUNED state */
410 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
411 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
412 fepriv->state = FESTATE_TUNED;
414 /* if we're tuned, then we have determined the correct inversion */
415 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
416 (fepriv->parameters.inversion == INVERSION_AUTO)) {
417 fepriv->parameters.inversion = fepriv->inversion;
422 /* if we are tuned already, check we're still locked */
423 if (fepriv->state & FESTATE_TUNED) {
424 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
426 /* we're tuned, and the lock is still good... */
427 if (s & FE_HAS_LOCK) {
429 } else { /* if we _WERE_ tuned, but now don't have a lock */
430 fepriv->state = FESTATE_ZIGZAG_FAST;
431 fepriv->started_auto_step = fepriv->auto_step;
432 fepriv->check_wrapped = 0;
436 /* don't actually do anything if we're in the LOSTLOCK state,
437 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
438 if ((fepriv->state & FESTATE_LOSTLOCK) &&
439 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
440 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
444 /* don't do anything if we're in the DISEQC state, since this
445 * might be someone with a motorized dish controlled by DISEQC.
446 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
447 if (fepriv->state & FESTATE_DISEQC) {
448 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
452 /* if we're in the RETUNE state, set everything up for a brand
453 * new scan, keeping the current inversion setting, as the next
454 * tune is _very_ likely to require the same */
455 if (fepriv->state & FESTATE_RETUNE) {
456 fepriv->lnb_drift = 0;
457 fepriv->auto_step = 0;
458 fepriv->auto_sub_step = 0;
459 fepriv->started_auto_step = 0;
460 fepriv->check_wrapped = 0;
464 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
465 fepriv->delay = fepriv->min_delay;
468 retval = dvb_frontend_swzigzag_autotune(fe,
469 fepriv->check_wrapped);
473 /* OK, if we've run out of trials at the fast speed.
474 * Drop back to slow for the _next_ attempt */
475 fepriv->state = FESTATE_SEARCHING_SLOW;
476 fepriv->started_auto_step = fepriv->auto_step;
479 fepriv->check_wrapped = 1;
481 /* if we've just retuned, enter the ZIGZAG_FAST state.
482 * This ensures we cannot return from an
483 * FE_SET_FRONTEND ioctl before the first frontend tune
485 if (fepriv->state & FESTATE_RETUNE) {
486 fepriv->state = FESTATE_TUNING_FAST;
491 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
492 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
494 /* Note: don't bother checking for wrapping; we stay in this
495 * state until we get a lock */
496 dvb_frontend_swzigzag_autotune(fe, 0);
500 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
502 struct dvb_frontend_private *fepriv = fe->frontend_priv;
504 if (fepriv->exit != DVB_FE_NO_EXIT)
507 if (fepriv->dvbdev->writers == 1)
508 if (time_after(jiffies, fepriv->release_jiffies +
509 dvb_shutdown_timeout * HZ))
515 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
517 struct dvb_frontend_private *fepriv = fe->frontend_priv;
519 if (fepriv->wakeup) {
523 return dvb_frontend_is_exiting(fe);
526 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
528 struct dvb_frontend_private *fepriv = fe->frontend_priv;
531 wake_up_interruptible(&fepriv->wait_queue);
534 static int dvb_frontend_thread(void *data)
536 struct dvb_frontend *fe = data;
537 struct dvb_frontend_private *fepriv = fe->frontend_priv;
538 unsigned long timeout;
540 enum dvbfe_algo algo;
542 struct dvb_frontend_parameters *params;
544 dprintk("%s\n", __func__);
546 fepriv->check_wrapped = 0;
548 fepriv->delay = 3*HZ;
551 fepriv->reinitialise = 0;
553 dvb_frontend_init(fe);
557 up(&fepriv->sem); /* is locked when we enter the thread... */
559 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
560 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
561 || freezing(current),
564 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
565 /* got signal or quitting */
566 fepriv->exit = DVB_FE_NORMAL_EXIT;
573 if (down_interruptible(&fepriv->sem))
576 if (fepriv->reinitialise) {
577 dvb_frontend_init(fe);
578 if (fepriv->tone != -1) {
579 fe->ops.set_tone(fe, fepriv->tone);
581 if (fepriv->voltage != -1) {
582 fe->ops.set_voltage(fe, fepriv->voltage);
584 fepriv->reinitialise = 0;
587 /* do an iteration of the tuning loop */
588 if (fe->ops.get_frontend_algo) {
589 algo = fe->ops.get_frontend_algo(fe);
592 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
593 params = NULL; /* have we been asked to RETUNE ? */
595 if (fepriv->state & FESTATE_RETUNE) {
596 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
597 params = &fepriv->parameters;
598 fepriv->state = FESTATE_TUNED;
602 fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
604 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
605 dprintk("%s: state changed, adding current state\n", __func__);
606 dvb_frontend_add_event(fe, s);
611 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
612 dvb_frontend_swzigzag(fe);
614 case DVBFE_ALGO_CUSTOM:
615 params = NULL; /* have we been asked to RETUNE ? */
616 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
617 if (fepriv->state & FESTATE_RETUNE) {
618 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
619 params = &fepriv->parameters;
620 fepriv->state = FESTATE_TUNED;
622 /* Case where we are going to search for a carrier
623 * User asked us to retune again for some reason, possibly
624 * requesting a search with a new set of parameters
626 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
627 if (fe->ops.search) {
628 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
629 /* We did do a search as was requested, the flags are
630 * now unset as well and has the flags wrt to search.
633 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
636 /* Track the carrier if the search was successful */
637 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
639 fe->ops.track(fe, &fepriv->parameters);
641 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
642 fepriv->delay = HZ / 2;
644 fe->ops.read_status(fe, &s);
645 if (s != fepriv->status) {
646 dvb_frontend_add_event(fe, s); /* update event list */
648 if (!(s & FE_HAS_LOCK)) {
649 fepriv->delay = HZ / 10;
650 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
652 fepriv->delay = 60 * HZ;
657 dprintk("%s: UNDEFINED ALGO !\n", __func__);
661 dvb_frontend_swzigzag(fe);
665 if (dvb_powerdown_on_sleep) {
666 if (fe->ops.set_voltage)
667 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
668 if (fe->ops.tuner_ops.sleep) {
669 if (fe->ops.i2c_gate_ctrl)
670 fe->ops.i2c_gate_ctrl(fe, 1);
671 fe->ops.tuner_ops.sleep(fe);
672 if (fe->ops.i2c_gate_ctrl)
673 fe->ops.i2c_gate_ctrl(fe, 0);
679 fepriv->thread = NULL;
680 if (kthread_should_stop())
681 fepriv->exit = DVB_FE_DEVICE_REMOVED;
683 fepriv->exit = DVB_FE_NO_EXIT;
686 dvb_frontend_wakeup(fe);
690 static void dvb_frontend_stop(struct dvb_frontend *fe)
692 struct dvb_frontend_private *fepriv = fe->frontend_priv;
694 dprintk ("%s\n", __func__);
696 fepriv->exit = DVB_FE_NORMAL_EXIT;
702 kthread_stop(fepriv->thread);
704 init_MUTEX (&fepriv->sem);
705 fepriv->state = FESTATE_IDLE;
707 /* paranoia check in case a signal arrived */
709 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
713 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
715 return ((curtime.tv_usec < lasttime.tv_usec) ?
716 1000000 - lasttime.tv_usec + curtime.tv_usec :
717 curtime.tv_usec - lasttime.tv_usec);
719 EXPORT_SYMBOL(timeval_usec_diff);
721 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
723 curtime->tv_usec += add_usec;
724 if (curtime->tv_usec >= 1000000) {
725 curtime->tv_usec -= 1000000;
731 * Sleep until gettimeofday() > waketime + add_usec
732 * This needs to be as precise as possible, but as the delay is
733 * usually between 2ms and 32ms, it is done using a scheduled msleep
734 * followed by usleep (normally a busy-wait loop) for the remainder
736 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
738 struct timeval lasttime;
741 timeval_usec_add(waketime, add_usec);
743 do_gettimeofday(&lasttime);
744 delta = timeval_usec_diff(lasttime, *waketime);
746 msleep((delta - 1500) / 1000);
747 do_gettimeofday(&lasttime);
748 newdelta = timeval_usec_diff(lasttime, *waketime);
749 delta = (newdelta > delta) ? 0 : newdelta;
754 EXPORT_SYMBOL(dvb_frontend_sleep_until);
756 static int dvb_frontend_start(struct dvb_frontend *fe)
759 struct dvb_frontend_private *fepriv = fe->frontend_priv;
760 struct task_struct *fe_thread;
762 dprintk ("%s\n", __func__);
764 if (fepriv->thread) {
765 if (fepriv->exit == DVB_FE_NO_EXIT)
768 dvb_frontend_stop (fe);
771 if (signal_pending(current))
773 if (down_interruptible (&fepriv->sem))
776 fepriv->state = FESTATE_IDLE;
777 fepriv->exit = DVB_FE_NO_EXIT;
778 fepriv->thread = NULL;
781 fe_thread = kthread_run(dvb_frontend_thread, fe,
782 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
783 if (IS_ERR(fe_thread)) {
784 ret = PTR_ERR(fe_thread);
785 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
789 fepriv->thread = fe_thread;
793 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
794 u32 *freq_min, u32 *freq_max)
796 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
798 if (fe->ops.info.frequency_max == 0)
799 *freq_max = fe->ops.tuner_ops.info.frequency_max;
800 else if (fe->ops.tuner_ops.info.frequency_max == 0)
801 *freq_max = fe->ops.info.frequency_max;
803 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
805 if (*freq_min == 0 || *freq_max == 0)
806 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
807 fe->dvb->num,fe->id);
810 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
811 struct dvb_frontend_parameters *parms)
816 /* range check: frequency */
817 dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
818 if ((freq_min && parms->frequency < freq_min) ||
819 (freq_max && parms->frequency > freq_max)) {
820 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
821 fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
825 /* range check: symbol rate */
826 if (fe->ops.info.type == FE_QPSK) {
827 if ((fe->ops.info.symbol_rate_min &&
828 parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
829 (fe->ops.info.symbol_rate_max &&
830 parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
831 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
832 fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
833 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
837 } else if (fe->ops.info.type == FE_QAM) {
838 if ((fe->ops.info.symbol_rate_min &&
839 parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
840 (fe->ops.info.symbol_rate_max &&
841 parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
842 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
843 fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
844 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
849 /* check for supported modulation */
850 if (fe->ops.info.type == FE_QAM &&
851 (parms->u.qam.modulation > QAM_AUTO ||
852 !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
853 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
854 fe->dvb->num, fe->id, parms->u.qam.modulation);
861 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
865 memset(&(fe->dtv_property_cache), 0,
866 sizeof(struct dtv_frontend_properties));
868 fe->dtv_property_cache.state = DTV_CLEAR;
869 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
870 fe->dtv_property_cache.inversion = INVERSION_AUTO;
871 fe->dtv_property_cache.fec_inner = FEC_AUTO;
872 fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO;
873 fe->dtv_property_cache.bandwidth_hz = BANDWIDTH_AUTO;
874 fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO;
875 fe->dtv_property_cache.hierarchy = HIERARCHY_AUTO;
876 fe->dtv_property_cache.symbol_rate = QAM_AUTO;
877 fe->dtv_property_cache.code_rate_HP = FEC_AUTO;
878 fe->dtv_property_cache.code_rate_LP = FEC_AUTO;
880 fe->dtv_property_cache.isdbt_partial_reception = -1;
881 fe->dtv_property_cache.isdbt_sb_mode = -1;
882 fe->dtv_property_cache.isdbt_sb_subchannel = -1;
883 fe->dtv_property_cache.isdbt_sb_segment_idx = -1;
884 fe->dtv_property_cache.isdbt_sb_segment_count = -1;
885 fe->dtv_property_cache.isdbt_layer_enabled = 0x7;
886 for (i = 0; i < 3; i++) {
887 fe->dtv_property_cache.layer[i].fec = FEC_AUTO;
888 fe->dtv_property_cache.layer[i].modulation = QAM_AUTO;
889 fe->dtv_property_cache.layer[i].interleaving = -1;
890 fe->dtv_property_cache.layer[i].segment_count = -1;
896 #define _DTV_CMD(n, s, b) \
904 static struct dtv_cmds_h dtv_cmds[] = {
905 _DTV_CMD(DTV_TUNE, 1, 0),
906 _DTV_CMD(DTV_CLEAR, 1, 0),
909 _DTV_CMD(DTV_FREQUENCY, 1, 0),
910 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
911 _DTV_CMD(DTV_MODULATION, 1, 0),
912 _DTV_CMD(DTV_INVERSION, 1, 0),
913 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
914 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
915 _DTV_CMD(DTV_INNER_FEC, 1, 0),
916 _DTV_CMD(DTV_VOLTAGE, 1, 0),
917 _DTV_CMD(DTV_TONE, 1, 0),
918 _DTV_CMD(DTV_PILOT, 1, 0),
919 _DTV_CMD(DTV_ROLLOFF, 1, 0),
920 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
921 _DTV_CMD(DTV_HIERARCHY, 1, 0),
922 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
923 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
924 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
925 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
927 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
928 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
929 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
930 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
931 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
932 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
933 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
934 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
935 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
936 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
937 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
938 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
939 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
940 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
941 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
942 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
943 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
944 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
946 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
947 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
948 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
949 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
950 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
951 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
952 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
953 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
954 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
955 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
956 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
957 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
958 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
959 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
960 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
961 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
962 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
963 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
965 _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
968 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
969 _DTV_CMD(DTV_API_VERSION, 0, 0),
970 _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
971 _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
972 _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
973 _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
974 _DTV_CMD(DTV_HIERARCHY, 0, 0),
977 static void dtv_property_dump(struct dtv_property *tvp)
981 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
982 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
987 dprintk("%s() tvp.cmd = 0x%08x (%s)\n"
990 ,dtv_cmds[ tvp->cmd ].name);
992 if(dtv_cmds[ tvp->cmd ].buffer) {
994 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
998 for(i = 0; i < tvp->u.buffer.len; i++)
999 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1002 ,tvp->u.buffer.data[i]);
1005 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1008 static int is_legacy_delivery_system(fe_delivery_system_t s)
1010 if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1011 (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1018 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1019 * drivers can use a single set_frontend tuning function, regardless of whether
1020 * it's being used for the legacy or new API, reducing code and complexity.
1022 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1023 struct dvb_frontend_parameters *p)
1025 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1027 c->frequency = p->frequency;
1028 c->inversion = p->inversion;
1030 switch (fe->ops.info.type) {
1032 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1033 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1034 c->symbol_rate = p->u.qpsk.symbol_rate;
1035 c->fec_inner = p->u.qpsk.fec_inner;
1036 c->delivery_system = SYS_DVBS;
1039 c->symbol_rate = p->u.qam.symbol_rate;
1040 c->fec_inner = p->u.qam.fec_inner;
1041 c->modulation = p->u.qam.modulation;
1042 c->delivery_system = SYS_DVBC_ANNEX_AC;
1045 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1046 c->bandwidth_hz = 6000000;
1047 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1048 c->bandwidth_hz = 7000000;
1049 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1050 c->bandwidth_hz = 8000000;
1052 /* Including BANDWIDTH_AUTO */
1053 c->bandwidth_hz = 0;
1054 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1055 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1056 c->modulation = p->u.ofdm.constellation;
1057 c->transmission_mode = p->u.ofdm.transmission_mode;
1058 c->guard_interval = p->u.ofdm.guard_interval;
1059 c->hierarchy = p->u.ofdm.hierarchy_information;
1060 c->delivery_system = SYS_DVBT;
1063 c->modulation = p->u.vsb.modulation;
1064 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1065 c->delivery_system = SYS_ATSC;
1067 c->delivery_system = SYS_DVBC_ANNEX_B;
1072 /* Ensure the cached values are set correctly in the frontend
1073 * legacy tuning structures, for the advanced tuning API.
1075 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1077 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1078 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1079 struct dvb_frontend_parameters *p = &fepriv->parameters;
1081 p->frequency = c->frequency;
1082 p->inversion = c->inversion;
1084 switch (fe->ops.info.type) {
1086 dprintk("%s() Preparing QPSK req\n", __func__);
1087 p->u.qpsk.symbol_rate = c->symbol_rate;
1088 p->u.qpsk.fec_inner = c->fec_inner;
1089 c->delivery_system = SYS_DVBS;
1092 dprintk("%s() Preparing QAM req\n", __func__);
1093 p->u.qam.symbol_rate = c->symbol_rate;
1094 p->u.qam.fec_inner = c->fec_inner;
1095 p->u.qam.modulation = c->modulation;
1096 c->delivery_system = SYS_DVBC_ANNEX_AC;
1099 dprintk("%s() Preparing OFDM req\n", __func__);
1100 if (c->bandwidth_hz == 6000000)
1101 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1102 else if (c->bandwidth_hz == 7000000)
1103 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1104 else if (c->bandwidth_hz == 8000000)
1105 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1107 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1108 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1109 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1110 p->u.ofdm.constellation = c->modulation;
1111 p->u.ofdm.transmission_mode = c->transmission_mode;
1112 p->u.ofdm.guard_interval = c->guard_interval;
1113 p->u.ofdm.hierarchy_information = c->hierarchy;
1114 c->delivery_system = SYS_DVBT;
1117 dprintk("%s() Preparing VSB req\n", __func__);
1118 p->u.vsb.modulation = c->modulation;
1119 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1120 c->delivery_system = SYS_ATSC;
1122 c->delivery_system = SYS_DVBC_ANNEX_B;
1127 /* Ensure the cached values are set correctly in the frontend
1128 * legacy tuning structures, for the legacy tuning API.
1130 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1132 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1133 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1134 struct dvb_frontend_parameters *p = &fepriv->parameters;
1136 p->frequency = c->frequency;
1137 p->inversion = c->inversion;
1139 switch(c->modulation) {
1144 p->u.qpsk.symbol_rate = c->symbol_rate;
1145 p->u.qpsk.fec_inner = c->fec_inner;
1151 if(c->delivery_system == SYS_ISDBT) {
1152 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1153 p->frequency = c->frequency;
1154 p->inversion = c->inversion;
1155 p->u.ofdm.constellation = QAM_AUTO;
1156 p->u.ofdm.code_rate_HP = FEC_AUTO;
1157 p->u.ofdm.code_rate_LP = FEC_AUTO;
1158 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1159 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1160 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1161 if (c->bandwidth_hz == 8000000)
1162 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1163 else if (c->bandwidth_hz == 7000000)
1164 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1165 else if (c->bandwidth_hz == 6000000)
1166 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1168 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1172 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1174 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1176 /* For legacy delivery systems we don't need the delivery_system to
1177 * be specified, but we populate the older structures from the cache
1178 * so we can call set_frontend on older drivers.
1180 if(is_legacy_delivery_system(c->delivery_system)) {
1182 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1183 dtv_property_legacy_params_sync(fe);
1186 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1188 /* For advanced delivery systems / modulation types ...
1189 * we seed the lecacy dvb_frontend_parameters structure
1190 * so that the sanity checking code later in the IOCTL processing
1191 * can validate our basic frequency ranges, symbolrates, modulation
1194 dtv_property_adv_params_sync(fe);
1198 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1199 unsigned int cmd, void *parg);
1200 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1201 unsigned int cmd, void *parg);
1203 static int dtv_property_process_get(struct dvb_frontend *fe,
1204 struct dtv_property *tvp,
1205 struct inode *inode, struct file *file)
1209 /* Allow the frontend to validate incoming properties */
1210 if (fe->ops.get_property)
1211 r = fe->ops.get_property(fe, tvp);
1218 tvp->u.data = fe->dtv_property_cache.frequency;
1220 case DTV_MODULATION:
1221 tvp->u.data = fe->dtv_property_cache.modulation;
1223 case DTV_BANDWIDTH_HZ:
1224 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1227 tvp->u.data = fe->dtv_property_cache.inversion;
1229 case DTV_SYMBOL_RATE:
1230 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1233 tvp->u.data = fe->dtv_property_cache.fec_inner;
1236 tvp->u.data = fe->dtv_property_cache.pilot;
1239 tvp->u.data = fe->dtv_property_cache.rolloff;
1241 case DTV_DELIVERY_SYSTEM:
1242 tvp->u.data = fe->dtv_property_cache.delivery_system;
1245 tvp->u.data = fe->dtv_property_cache.voltage;
1248 tvp->u.data = fe->dtv_property_cache.sectone;
1250 case DTV_API_VERSION:
1251 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1253 case DTV_CODE_RATE_HP:
1254 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1256 case DTV_CODE_RATE_LP:
1257 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1259 case DTV_GUARD_INTERVAL:
1260 tvp->u.data = fe->dtv_property_cache.guard_interval;
1262 case DTV_TRANSMISSION_MODE:
1263 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1266 tvp->u.data = fe->dtv_property_cache.hierarchy;
1269 /* ISDB-T Support here */
1270 case DTV_ISDBT_PARTIAL_RECEPTION:
1271 tvp->u.data = fe->dtv_property_cache.isdbt_partial_reception;
1273 case DTV_ISDBT_SOUND_BROADCASTING:
1274 tvp->u.data = fe->dtv_property_cache.isdbt_sb_mode;
1276 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1277 tvp->u.data = fe->dtv_property_cache.isdbt_sb_subchannel;
1279 case DTV_ISDBT_SB_SEGMENT_IDX:
1280 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_idx;
1282 case DTV_ISDBT_SB_SEGMENT_COUNT:
1283 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_count;
1285 case DTV_ISDBT_LAYER_ENABLED:
1286 tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled;
1288 case DTV_ISDBT_LAYERA_FEC:
1289 tvp->u.data = fe->dtv_property_cache.layer[0].fec;
1291 case DTV_ISDBT_LAYERA_MODULATION:
1292 tvp->u.data = fe->dtv_property_cache.layer[0].modulation;
1294 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1295 tvp->u.data = fe->dtv_property_cache.layer[0].segment_count;
1297 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1298 tvp->u.data = fe->dtv_property_cache.layer[0].interleaving;
1300 case DTV_ISDBT_LAYERB_FEC:
1301 tvp->u.data = fe->dtv_property_cache.layer[1].fec;
1303 case DTV_ISDBT_LAYERB_MODULATION:
1304 tvp->u.data = fe->dtv_property_cache.layer[1].modulation;
1306 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1307 tvp->u.data = fe->dtv_property_cache.layer[1].segment_count;
1309 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1310 tvp->u.data = fe->dtv_property_cache.layer[1].interleaving;
1312 case DTV_ISDBT_LAYERC_FEC:
1313 tvp->u.data = fe->dtv_property_cache.layer[2].fec;
1315 case DTV_ISDBT_LAYERC_MODULATION:
1316 tvp->u.data = fe->dtv_property_cache.layer[2].modulation;
1318 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1319 tvp->u.data = fe->dtv_property_cache.layer[2].segment_count;
1321 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1322 tvp->u.data = fe->dtv_property_cache.layer[2].interleaving;
1324 case DTV_ISDBS_TS_ID:
1325 tvp->u.data = fe->dtv_property_cache.isdbs_ts_id;
1331 dtv_property_dump(tvp);
1336 static int dtv_property_process_set(struct dvb_frontend *fe,
1337 struct dtv_property *tvp,
1338 struct inode *inode,
1342 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1343 dtv_property_dump(tvp);
1345 /* Allow the frontend to validate incoming properties */
1346 if (fe->ops.set_property)
1347 r = fe->ops.set_property(fe, tvp);
1354 /* Reset a cache of data specific to the frontend here. This does
1355 * not effect hardware.
1357 dvb_frontend_clear_cache(fe);
1358 dprintk("%s() Flushing property cache\n", __func__);
1361 /* interpret the cache of data, build either a traditional frontend
1362 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1365 fe->dtv_property_cache.state = tvp->cmd;
1366 dprintk("%s() Finalised property cache\n", __func__);
1367 dtv_property_cache_submit(fe);
1369 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1370 &fepriv->parameters);
1373 fe->dtv_property_cache.frequency = tvp->u.data;
1375 case DTV_MODULATION:
1376 fe->dtv_property_cache.modulation = tvp->u.data;
1378 case DTV_BANDWIDTH_HZ:
1379 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1382 fe->dtv_property_cache.inversion = tvp->u.data;
1384 case DTV_SYMBOL_RATE:
1385 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1388 fe->dtv_property_cache.fec_inner = tvp->u.data;
1391 fe->dtv_property_cache.pilot = tvp->u.data;
1394 fe->dtv_property_cache.rolloff = tvp->u.data;
1396 case DTV_DELIVERY_SYSTEM:
1397 fe->dtv_property_cache.delivery_system = tvp->u.data;
1400 fe->dtv_property_cache.voltage = tvp->u.data;
1401 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1402 (void *)fe->dtv_property_cache.voltage);
1405 fe->dtv_property_cache.sectone = tvp->u.data;
1406 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1407 (void *)fe->dtv_property_cache.sectone);
1409 case DTV_CODE_RATE_HP:
1410 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1412 case DTV_CODE_RATE_LP:
1413 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1415 case DTV_GUARD_INTERVAL:
1416 fe->dtv_property_cache.guard_interval = tvp->u.data;
1418 case DTV_TRANSMISSION_MODE:
1419 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1422 fe->dtv_property_cache.hierarchy = tvp->u.data;
1425 /* ISDB-T Support here */
1426 case DTV_ISDBT_PARTIAL_RECEPTION:
1427 fe->dtv_property_cache.isdbt_partial_reception = tvp->u.data;
1429 case DTV_ISDBT_SOUND_BROADCASTING:
1430 fe->dtv_property_cache.isdbt_sb_mode = tvp->u.data;
1432 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1433 fe->dtv_property_cache.isdbt_sb_subchannel = tvp->u.data;
1435 case DTV_ISDBT_SB_SEGMENT_IDX:
1436 fe->dtv_property_cache.isdbt_sb_segment_idx = tvp->u.data;
1438 case DTV_ISDBT_SB_SEGMENT_COUNT:
1439 fe->dtv_property_cache.isdbt_sb_segment_count = tvp->u.data;
1441 case DTV_ISDBT_LAYER_ENABLED:
1442 fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data;
1444 case DTV_ISDBT_LAYERA_FEC:
1445 fe->dtv_property_cache.layer[0].fec = tvp->u.data;
1447 case DTV_ISDBT_LAYERA_MODULATION:
1448 fe->dtv_property_cache.layer[0].modulation = tvp->u.data;
1450 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1451 fe->dtv_property_cache.layer[0].segment_count = tvp->u.data;
1453 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1454 fe->dtv_property_cache.layer[0].interleaving = tvp->u.data;
1456 case DTV_ISDBT_LAYERB_FEC:
1457 fe->dtv_property_cache.layer[1].fec = tvp->u.data;
1459 case DTV_ISDBT_LAYERB_MODULATION:
1460 fe->dtv_property_cache.layer[1].modulation = tvp->u.data;
1462 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1463 fe->dtv_property_cache.layer[1].segment_count = tvp->u.data;
1465 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1466 fe->dtv_property_cache.layer[1].interleaving = tvp->u.data;
1468 case DTV_ISDBT_LAYERC_FEC:
1469 fe->dtv_property_cache.layer[2].fec = tvp->u.data;
1471 case DTV_ISDBT_LAYERC_MODULATION:
1472 fe->dtv_property_cache.layer[2].modulation = tvp->u.data;
1474 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1475 fe->dtv_property_cache.layer[2].segment_count = tvp->u.data;
1477 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1478 fe->dtv_property_cache.layer[2].interleaving = tvp->u.data;
1480 case DTV_ISDBS_TS_ID:
1481 fe->dtv_property_cache.isdbs_ts_id = tvp->u.data;
1490 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1491 unsigned int cmd, void *parg)
1493 struct dvb_device *dvbdev = file->private_data;
1494 struct dvb_frontend *fe = dvbdev->priv;
1495 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1496 int err = -EOPNOTSUPP;
1498 dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1500 if (fepriv->exit != DVB_FE_NO_EXIT)
1503 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1504 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1505 cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1508 if (down_interruptible (&fepriv->sem))
1509 return -ERESTARTSYS;
1511 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1512 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1514 fe->dtv_property_cache.state = DTV_UNDEFINED;
1515 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1522 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1523 unsigned int cmd, void *parg)
1525 struct dvb_device *dvbdev = file->private_data;
1526 struct dvb_frontend *fe = dvbdev->priv;
1529 struct dtv_properties *tvps = NULL;
1530 struct dtv_property *tvp = NULL;
1533 dprintk("%s\n", __func__);
1535 if(cmd == FE_SET_PROPERTY) {
1536 tvps = (struct dtv_properties __user *)parg;
1538 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1539 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1541 /* Put an arbitrary limit on the number of messages that can
1542 * be sent at once */
1543 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1546 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1552 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1557 for (i = 0; i < tvps->num; i++) {
1558 (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1559 err |= (tvp + i)->result;
1562 if(fe->dtv_property_cache.state == DTV_TUNE)
1563 dprintk("%s() Property cache is full, tuning\n", __func__);
1566 if(cmd == FE_GET_PROPERTY) {
1568 tvps = (struct dtv_properties __user *)parg;
1570 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1571 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1573 /* Put an arbitrary limit on the number of messages that can
1574 * be sent at once */
1575 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1578 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1584 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1589 for (i = 0; i < tvps->num; i++) {
1590 (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1591 err |= (tvp + i)->result;
1594 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1607 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1608 unsigned int cmd, void *parg)
1610 struct dvb_device *dvbdev = file->private_data;
1611 struct dvb_frontend *fe = dvbdev->priv;
1612 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1613 int cb_err, err = -EOPNOTSUPP;
1615 if (fe->dvb->fe_ioctl_override) {
1616 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1622 /* fe_ioctl_override returning 0 allows
1623 * dvb-core to continue handling the ioctl */
1628 struct dvb_frontend_info* info = parg;
1629 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1630 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1632 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1633 * do it, it is done for it. */
1634 info->caps |= FE_CAN_INVERSION_AUTO;
1639 case FE_READ_STATUS: {
1640 fe_status_t* status = parg;
1642 /* if retune was requested but hasn't occured yet, prevent
1643 * that user get signal state from previous tuning */
1644 if (fepriv->state == FESTATE_RETUNE ||
1645 fepriv->state == FESTATE_ERROR) {
1651 if (fe->ops.read_status)
1652 err = fe->ops.read_status(fe, status);
1656 if (fe->ops.read_ber)
1657 err = fe->ops.read_ber(fe, (__u32*) parg);
1660 case FE_READ_SIGNAL_STRENGTH:
1661 if (fe->ops.read_signal_strength)
1662 err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1666 if (fe->ops.read_snr)
1667 err = fe->ops.read_snr(fe, (__u16*) parg);
1670 case FE_READ_UNCORRECTED_BLOCKS:
1671 if (fe->ops.read_ucblocks)
1672 err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1676 case FE_DISEQC_RESET_OVERLOAD:
1677 if (fe->ops.diseqc_reset_overload) {
1678 err = fe->ops.diseqc_reset_overload(fe);
1679 fepriv->state = FESTATE_DISEQC;
1684 case FE_DISEQC_SEND_MASTER_CMD:
1685 if (fe->ops.diseqc_send_master_cmd) {
1686 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1687 fepriv->state = FESTATE_DISEQC;
1692 case FE_DISEQC_SEND_BURST:
1693 if (fe->ops.diseqc_send_burst) {
1694 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1695 fepriv->state = FESTATE_DISEQC;
1701 if (fe->ops.set_tone) {
1702 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1703 fepriv->tone = (fe_sec_tone_mode_t) parg;
1704 fepriv->state = FESTATE_DISEQC;
1709 case FE_SET_VOLTAGE:
1710 if (fe->ops.set_voltage) {
1711 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1712 fepriv->voltage = (fe_sec_voltage_t) parg;
1713 fepriv->state = FESTATE_DISEQC;
1718 case FE_DISHNETWORK_SEND_LEGACY_CMD:
1719 if (fe->ops.dishnetwork_send_legacy_command) {
1720 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1721 fepriv->state = FESTATE_DISEQC;
1723 } else if (fe->ops.set_voltage) {
1725 * NOTE: This is a fallback condition. Some frontends
1726 * (stv0299 for instance) take longer than 8msec to
1727 * respond to a set_voltage command. Those switches
1728 * need custom routines to switch properly. For all
1729 * other frontends, the following shoule work ok.
1730 * Dish network legacy switches (as used by Dish500)
1731 * are controlled by sending 9-bit command words
1732 * spaced 8msec apart.
1733 * the actual command word is switch/port dependant
1734 * so it is up to the userspace application to send
1735 * the right command.
1736 * The command must always start with a '0' after
1737 * initialization, so parg is 8 bits and does not
1738 * include the initialization or start bit
1740 unsigned long swcmd = ((unsigned long) parg) << 1;
1741 struct timeval nexttime;
1742 struct timeval tv[10];
1745 if (dvb_frontend_debug)
1746 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1747 do_gettimeofday(&nexttime);
1748 if (dvb_frontend_debug)
1749 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1750 /* before sending a command, initialize by sending
1751 * a 32ms 18V to the switch
1753 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1754 dvb_frontend_sleep_until(&nexttime, 32000);
1756 for (i = 0; i < 9; i++) {
1757 if (dvb_frontend_debug)
1758 do_gettimeofday(&tv[i + 1]);
1759 if ((swcmd & 0x01) != last) {
1760 /* set voltage to (last ? 13V : 18V) */
1761 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1762 last = (last) ? 0 : 1;
1766 dvb_frontend_sleep_until(&nexttime, 8000);
1768 if (dvb_frontend_debug) {
1769 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1770 __func__, fe->dvb->num);
1771 for (i = 1; i < 10; i++)
1772 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1775 fepriv->state = FESTATE_DISEQC;
1780 case FE_DISEQC_RECV_SLAVE_REPLY:
1781 if (fe->ops.diseqc_recv_slave_reply)
1782 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1785 case FE_ENABLE_HIGH_LNB_VOLTAGE:
1786 if (fe->ops.enable_high_lnb_voltage)
1787 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1790 case FE_SET_FRONTEND: {
1791 struct dvb_frontend_tune_settings fetunesettings;
1793 if(fe->dtv_property_cache.state == DTV_TUNE) {
1794 if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1799 if (dvb_frontend_check_parameters(fe, parg) < 0) {
1804 memcpy (&fepriv->parameters, parg,
1805 sizeof (struct dvb_frontend_parameters));
1806 dtv_property_cache_sync(fe, &fepriv->parameters);
1809 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1810 memcpy(&fetunesettings.parameters, parg,
1811 sizeof (struct dvb_frontend_parameters));
1813 /* force auto frequency inversion if requested */
1814 if (dvb_force_auto_inversion) {
1815 fepriv->parameters.inversion = INVERSION_AUTO;
1816 fetunesettings.parameters.inversion = INVERSION_AUTO;
1818 if (fe->ops.info.type == FE_OFDM) {
1819 /* without hierarchical coding code_rate_LP is irrelevant,
1820 * so we tolerate the otherwise invalid FEC_NONE setting */
1821 if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1822 fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1823 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1826 /* get frontend-specific tuning settings */
1827 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1828 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1829 fepriv->max_drift = fetunesettings.max_drift;
1830 fepriv->step_size = fetunesettings.step_size;
1832 /* default values */
1833 switch(fe->ops.info.type) {
1835 fepriv->min_delay = HZ/20;
1836 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1837 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1841 fepriv->min_delay = HZ/20;
1842 fepriv->step_size = 0; /* no zigzag */
1843 fepriv->max_drift = 0;
1847 fepriv->min_delay = HZ/20;
1848 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1849 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1852 fepriv->min_delay = HZ/20;
1853 fepriv->step_size = 0;
1854 fepriv->max_drift = 0;
1858 if (dvb_override_tune_delay > 0)
1859 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1861 fepriv->state = FESTATE_RETUNE;
1863 /* Request the search algorithm to search */
1864 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1866 dvb_frontend_wakeup(fe);
1867 dvb_frontend_add_event(fe, 0);
1874 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1877 case FE_GET_FRONTEND:
1878 if (fe->ops.get_frontend) {
1879 memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1880 err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1884 case FE_SET_FRONTEND_TUNE_MODE:
1885 fepriv->tune_mode_flags = (unsigned long) parg;
1890 if (fe->dvb->fe_ioctl_override) {
1891 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1901 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1903 struct dvb_device *dvbdev = file->private_data;
1904 struct dvb_frontend *fe = dvbdev->priv;
1905 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1907 dprintk ("%s\n", __func__);
1909 poll_wait (file, &fepriv->events.wait_queue, wait);
1911 if (fepriv->events.eventw != fepriv->events.eventr)
1912 return (POLLIN | POLLRDNORM | POLLPRI);
1917 static int dvb_frontend_open(struct inode *inode, struct file *file)
1919 struct dvb_device *dvbdev = file->private_data;
1920 struct dvb_frontend *fe = dvbdev->priv;
1921 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1922 struct dvb_adapter *adapter = fe->dvb;
1925 dprintk ("%s\n", __func__);
1926 if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
1929 if (adapter->mfe_shared) {
1930 mutex_lock (&adapter->mfe_lock);
1932 if (adapter->mfe_dvbdev == NULL)
1933 adapter->mfe_dvbdev = dvbdev;
1935 else if (adapter->mfe_dvbdev != dvbdev) {
1937 *mfedev = adapter->mfe_dvbdev;
1939 *mfe = mfedev->priv;
1940 struct dvb_frontend_private
1941 *mfepriv = mfe->frontend_priv;
1942 int mferetry = (dvb_mfe_wait_time << 1);
1944 mutex_unlock (&adapter->mfe_lock);
1945 while (mferetry-- && (mfedev->users != -1 ||
1946 mfepriv->thread != NULL)) {
1947 if(msleep_interruptible(500)) {
1948 if(signal_pending(current))
1953 mutex_lock (&adapter->mfe_lock);
1954 if(adapter->mfe_dvbdev != dvbdev) {
1955 mfedev = adapter->mfe_dvbdev;
1957 mfepriv = mfe->frontend_priv;
1958 if (mfedev->users != -1 ||
1959 mfepriv->thread != NULL) {
1960 mutex_unlock (&adapter->mfe_lock);
1963 adapter->mfe_dvbdev = dvbdev;
1968 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1969 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1973 if ((ret = dvb_generic_open (inode, file)) < 0)
1976 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1977 /* normal tune mode when opened R/W */
1978 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1980 fepriv->voltage = -1;
1982 ret = dvb_frontend_start (fe);
1986 /* empty event queue */
1987 fepriv->events.eventr = fepriv->events.eventw = 0;
1990 if (adapter->mfe_shared)
1991 mutex_unlock (&adapter->mfe_lock);
1995 dvb_generic_release(inode, file);
1997 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1998 fe->ops.ts_bus_ctrl(fe, 0);
2000 if (adapter->mfe_shared)
2001 mutex_unlock (&adapter->mfe_lock);
2005 static int dvb_frontend_release(struct inode *inode, struct file *file)
2007 struct dvb_device *dvbdev = file->private_data;
2008 struct dvb_frontend *fe = dvbdev->priv;
2009 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2012 dprintk ("%s\n", __func__);
2014 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
2015 fepriv->release_jiffies = jiffies;
2017 ret = dvb_generic_release (inode, file);
2019 if (dvbdev->users == -1) {
2020 if (fepriv->exit != DVB_FE_NO_EXIT) {
2021 fops_put(file->f_op);
2023 wake_up(&dvbdev->wait_queue);
2025 if (fe->ops.ts_bus_ctrl)
2026 fe->ops.ts_bus_ctrl(fe, 0);
2032 static const struct file_operations dvb_frontend_fops = {
2033 .owner = THIS_MODULE,
2034 .ioctl = dvb_generic_ioctl,
2035 .poll = dvb_frontend_poll,
2036 .open = dvb_frontend_open,
2037 .release = dvb_frontend_release
2040 int dvb_register_frontend(struct dvb_adapter* dvb,
2041 struct dvb_frontend* fe)
2043 struct dvb_frontend_private *fepriv;
2044 static const struct dvb_device dvbdev_template = {
2048 .fops = &dvb_frontend_fops,
2049 .kernel_ioctl = dvb_frontend_ioctl
2052 dprintk ("%s\n", __func__);
2054 if (mutex_lock_interruptible(&frontend_mutex))
2055 return -ERESTARTSYS;
2057 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2058 if (fe->frontend_priv == NULL) {
2059 mutex_unlock(&frontend_mutex);
2062 fepriv = fe->frontend_priv;
2064 init_MUTEX (&fepriv->sem);
2065 init_waitqueue_head (&fepriv->wait_queue);
2066 init_waitqueue_head (&fepriv->events.wait_queue);
2067 mutex_init(&fepriv->events.mtx);
2069 fepriv->inversion = INVERSION_OFF;
2071 printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2076 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2077 fe, DVB_DEVICE_FRONTEND);
2079 mutex_unlock(&frontend_mutex);
2082 EXPORT_SYMBOL(dvb_register_frontend);
2084 int dvb_unregister_frontend(struct dvb_frontend* fe)
2086 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2087 dprintk ("%s\n", __func__);
2089 mutex_lock(&frontend_mutex);
2090 dvb_frontend_stop (fe);
2091 mutex_unlock(&frontend_mutex);
2093 if (fepriv->dvbdev->users < -1)
2094 wait_event(fepriv->dvbdev->wait_queue,
2095 fepriv->dvbdev->users==-1);
2097 mutex_lock(&frontend_mutex);
2098 dvb_unregister_device (fepriv->dvbdev);
2100 /* fe is invalid now */
2102 mutex_unlock(&frontend_mutex);
2105 EXPORT_SYMBOL(dvb_unregister_frontend);
2107 #ifdef CONFIG_MEDIA_ATTACH
2108 void dvb_frontend_detach(struct dvb_frontend* fe)
2112 if (fe->ops.release_sec) {
2113 fe->ops.release_sec(fe);
2114 symbol_put_addr(fe->ops.release_sec);
2116 if (fe->ops.tuner_ops.release) {
2117 fe->ops.tuner_ops.release(fe);
2118 symbol_put_addr(fe->ops.tuner_ops.release);
2120 if (fe->ops.analog_ops.release) {
2121 fe->ops.analog_ops.release(fe);
2122 symbol_put_addr(fe->ops.analog_ops.release);
2124 ptr = (void*)fe->ops.release;
2126 fe->ops.release(fe);
2127 symbol_put_addr(ptr);
2131 void dvb_frontend_detach(struct dvb_frontend* fe)
2133 if (fe->ops.release_sec)
2134 fe->ops.release_sec(fe);
2135 if (fe->ops.tuner_ops.release)
2136 fe->ops.tuner_ops.release(fe);
2137 if (fe->ops.analog_ops.release)
2138 fe->ops.analog_ops.release(fe);
2139 if (fe->ops.release)
2140 fe->ops.release(fe);
2143 EXPORT_SYMBOL(dvb_frontend_detach);