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/module.h>
35 #include <linux/moduleparam.h>
36 #include <linux/list.h>
37 #include <linux/suspend.h>
38 #include <linux/jiffies.h>
39 #include <asm/processor.h>
41 #include "dvb_frontend.h"
44 static int dvb_frontend_debug;
45 static int dvb_shutdown_timeout = 5;
46 static int dvb_force_auto_inversion;
47 static int dvb_override_tune_delay;
48 static int dvb_powerdown_on_sleep = 1;
50 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
51 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
52 module_param(dvb_shutdown_timeout, int, 0644);
53 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
54 module_param(dvb_force_auto_inversion, int, 0644);
55 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
56 module_param(dvb_override_tune_delay, int, 0644);
57 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
58 module_param(dvb_powerdown_on_sleep, int, 0644);
59 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB volatage off on sleep (default)");
61 #define dprintk if (dvb_frontend_debug) printk
63 #define FESTATE_IDLE 1
64 #define FESTATE_RETUNE 2
65 #define FESTATE_TUNING_FAST 4
66 #define FESTATE_TUNING_SLOW 8
67 #define FESTATE_TUNED 16
68 #define FESTATE_ZIGZAG_FAST 32
69 #define FESTATE_ZIGZAG_SLOW 64
70 #define FESTATE_DISEQC 128
71 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
72 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
73 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
74 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
76 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
77 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
78 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
79 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
80 * FESTATE_TUNED. The frontend has successfully locked on.
81 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
82 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
83 * FESTATE_DISEQC. A DISEQC command has just been issued.
84 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
85 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
86 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
87 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
90 static DEFINE_MUTEX(frontend_mutex);
92 struct dvb_frontend_private {
94 /* thread/frontend values */
95 struct dvb_device *dvbdev;
96 struct dvb_frontend_parameters parameters;
97 struct dvb_fe_events events;
99 struct list_head list_head;
100 wait_queue_head_t wait_queue;
102 unsigned long release_jiffies;
106 unsigned long tune_mode_flags;
108 unsigned int reinitialise;
112 /* swzigzag values */
114 unsigned int bending;
116 unsigned int inversion;
117 unsigned int auto_step;
118 unsigned int auto_sub_step;
119 unsigned int started_auto_step;
120 unsigned int min_delay;
121 unsigned int max_drift;
122 unsigned int step_size;
124 unsigned int check_wrapped;
127 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
129 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
131 struct dvb_frontend_private *fepriv = fe->frontend_priv;
132 struct dvb_fe_events *events = &fepriv->events;
133 struct dvb_frontend_event *e;
136 dprintk ("%s\n", __FUNCTION__);
138 if (down_interruptible (&events->sem))
141 wp = (events->eventw + 1) % MAX_EVENT;
143 if (wp == events->eventr) {
144 events->overflow = 1;
145 events->eventr = (events->eventr + 1) % MAX_EVENT;
148 e = &events->events[events->eventw];
150 memcpy (&e->parameters, &fepriv->parameters,
151 sizeof (struct dvb_frontend_parameters));
153 if (status & FE_HAS_LOCK)
154 if (fe->ops->get_frontend)
155 fe->ops->get_frontend(fe, &e->parameters);
163 wake_up_interruptible (&events->wait_queue);
166 static int dvb_frontend_get_event(struct dvb_frontend *fe,
167 struct dvb_frontend_event *event, int flags)
169 struct dvb_frontend_private *fepriv = fe->frontend_priv;
170 struct dvb_fe_events *events = &fepriv->events;
172 dprintk ("%s\n", __FUNCTION__);
174 if (events->overflow) {
175 events->overflow = 0;
179 if (events->eventw == events->eventr) {
182 if (flags & O_NONBLOCK)
187 ret = wait_event_interruptible (events->wait_queue,
188 events->eventw != events->eventr);
190 if (down_interruptible (&fepriv->sem))
197 if (down_interruptible (&events->sem))
200 memcpy (event, &events->events[events->eventr],
201 sizeof(struct dvb_frontend_event));
203 events->eventr = (events->eventr + 1) % MAX_EVENT;
210 static void dvb_frontend_init(struct dvb_frontend *fe)
212 dprintk ("DVB: initialising frontend %i (%s)...\n",
220 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
222 struct dvb_frontend_private *fepriv = fe->frontend_priv;
224 fepriv->reinitialise = 1;
225 dvb_frontend_wakeup(fe);
227 EXPORT_SYMBOL(dvb_frontend_reinitialise);
229 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
233 dprintk ("%s\n", __FUNCTION__);
236 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
238 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
240 q2 = fepriv->quality - 128;
243 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
247 * Performs automatic twiddling of frontend parameters.
249 * @param fe The frontend concerned.
250 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
251 * @returns Number of complete iterations that have been performed.
253 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
257 struct dvb_frontend_private *fepriv = fe->frontend_priv;
258 int original_inversion = fepriv->parameters.inversion;
259 u32 original_frequency = fepriv->parameters.frequency;
261 /* are we using autoinversion? */
262 autoinversion = ((!(fe->ops->info.caps & FE_CAN_INVERSION_AUTO)) &&
263 (fepriv->parameters.inversion == INVERSION_AUTO));
265 /* setup parameters correctly */
267 /* calculate the lnb_drift */
268 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
270 /* wrap the auto_step if we've exceeded the maximum drift */
271 if (fepriv->lnb_drift > fepriv->max_drift) {
272 fepriv->auto_step = 0;
273 fepriv->auto_sub_step = 0;
274 fepriv->lnb_drift = 0;
277 /* perform inversion and +/- zigzag */
278 switch(fepriv->auto_sub_step) {
280 /* try with the current inversion and current drift setting */
285 if (!autoinversion) break;
287 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
292 if (fepriv->lnb_drift == 0) break;
294 fepriv->lnb_drift = -fepriv->lnb_drift;
299 if (fepriv->lnb_drift == 0) break;
300 if (!autoinversion) break;
302 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
303 fepriv->lnb_drift = -fepriv->lnb_drift;
309 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
313 if (!ready) fepriv->auto_sub_step++;
316 /* if this attempt would hit where we started, indicate a complete
317 * iteration has occurred */
318 if ((fepriv->auto_step == fepriv->started_auto_step) &&
319 (fepriv->auto_sub_step == 0) && check_wrapped) {
323 dprintk("%s: drift:%i inversion:%i auto_step:%i "
324 "auto_sub_step:%i started_auto_step:%i\n",
325 __FUNCTION__, fepriv->lnb_drift, fepriv->inversion,
326 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
328 /* set the frontend itself */
329 fepriv->parameters.frequency += fepriv->lnb_drift;
331 fepriv->parameters.inversion = fepriv->inversion;
332 if (fe->ops->set_frontend)
333 fe->ops->set_frontend(fe, &fepriv->parameters);
335 fepriv->parameters.frequency = original_frequency;
336 fepriv->parameters.inversion = original_inversion;
338 fepriv->auto_sub_step++;
342 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
345 struct dvb_frontend_private *fepriv = fe->frontend_priv;
347 /* if we've got no parameters, just keep idling */
348 if (fepriv->state & FESTATE_IDLE) {
349 fepriv->delay = 3*HZ;
354 /* in SCAN mode, we just set the frontend when asked and leave it alone */
355 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
356 if (fepriv->state & FESTATE_RETUNE) {
357 if (fe->ops->set_frontend)
358 fe->ops->set_frontend(fe, &fepriv->parameters);
359 fepriv->state = FESTATE_TUNED;
361 fepriv->delay = 3*HZ;
366 /* get the frontend status */
367 if (fepriv->state & FESTATE_RETUNE) {
370 if (fe->ops->read_status)
371 fe->ops->read_status(fe, &s);
372 if (s != fepriv->status) {
373 dvb_frontend_add_event(fe, s);
378 /* if we're not tuned, and we have a lock, move to the TUNED state */
379 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
380 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
381 fepriv->state = FESTATE_TUNED;
383 /* if we're tuned, then we have determined the correct inversion */
384 if ((!(fe->ops->info.caps & FE_CAN_INVERSION_AUTO)) &&
385 (fepriv->parameters.inversion == INVERSION_AUTO)) {
386 fepriv->parameters.inversion = fepriv->inversion;
391 /* if we are tuned already, check we're still locked */
392 if (fepriv->state & FESTATE_TUNED) {
393 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
395 /* we're tuned, and the lock is still good... */
396 if (s & FE_HAS_LOCK) {
398 } else { /* if we _WERE_ tuned, but now don't have a lock */
399 fepriv->state = FESTATE_ZIGZAG_FAST;
400 fepriv->started_auto_step = fepriv->auto_step;
401 fepriv->check_wrapped = 0;
405 /* don't actually do anything if we're in the LOSTLOCK state,
406 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
407 if ((fepriv->state & FESTATE_LOSTLOCK) &&
408 (fe->ops->info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
409 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
413 /* don't do anything if we're in the DISEQC state, since this
414 * might be someone with a motorized dish controlled by DISEQC.
415 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
416 if (fepriv->state & FESTATE_DISEQC) {
417 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
421 /* if we're in the RETUNE state, set everything up for a brand
422 * new scan, keeping the current inversion setting, as the next
423 * tune is _very_ likely to require the same */
424 if (fepriv->state & FESTATE_RETUNE) {
425 fepriv->lnb_drift = 0;
426 fepriv->auto_step = 0;
427 fepriv->auto_sub_step = 0;
428 fepriv->started_auto_step = 0;
429 fepriv->check_wrapped = 0;
433 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
434 fepriv->delay = fepriv->min_delay;
437 if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) {
438 /* OK, if we've run out of trials at the fast speed.
439 * Drop back to slow for the _next_ attempt */
440 fepriv->state = FESTATE_SEARCHING_SLOW;
441 fepriv->started_auto_step = fepriv->auto_step;
444 fepriv->check_wrapped = 1;
446 /* if we've just retuned, enter the ZIGZAG_FAST state.
447 * This ensures we cannot return from an
448 * FE_SET_FRONTEND ioctl before the first frontend tune
450 if (fepriv->state & FESTATE_RETUNE) {
451 fepriv->state = FESTATE_TUNING_FAST;
456 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
457 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
459 /* Note: don't bother checking for wrapping; we stay in this
460 * state until we get a lock */
461 dvb_frontend_swzigzag_autotune(fe, 0);
465 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
467 struct dvb_frontend_private *fepriv = fe->frontend_priv;
472 if (fepriv->dvbdev->writers == 1)
473 if (time_after(jiffies, fepriv->release_jiffies +
474 dvb_shutdown_timeout * HZ))
480 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
482 struct dvb_frontend_private *fepriv = fe->frontend_priv;
484 if (fepriv->wakeup) {
488 return dvb_frontend_is_exiting(fe);
491 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
493 struct dvb_frontend_private *fepriv = fe->frontend_priv;
496 wake_up_interruptible(&fepriv->wait_queue);
499 static int dvb_frontend_thread(void *data)
501 struct dvb_frontend *fe = data;
502 struct dvb_frontend_private *fepriv = fe->frontend_priv;
503 unsigned long timeout;
506 struct dvb_frontend_parameters *params;
508 dprintk("%s\n", __FUNCTION__);
510 snprintf (name, sizeof(name), "kdvb-fe-%i", fe->dvb->num);
514 sigfillset(¤t->blocked);
517 fepriv->check_wrapped = 0;
519 fepriv->delay = 3*HZ;
522 fepriv->reinitialise = 0;
524 dvb_frontend_init(fe);
527 up(&fepriv->sem); /* is locked when we enter the thread... */
529 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
530 dvb_frontend_should_wakeup(fe),
532 if (0 != dvb_frontend_is_exiting(fe)) {
533 /* got signal or quitting */
539 if (down_interruptible(&fepriv->sem))
542 if (fepriv->reinitialise) {
543 dvb_frontend_init(fe);
544 if (fepriv->tone != -1) {
545 fe->ops->set_tone(fe, fepriv->tone);
547 if (fepriv->voltage != -1) {
548 fe->ops->set_voltage(fe, fepriv->voltage);
550 fepriv->reinitialise = 0;
553 /* do an iteration of the tuning loop */
555 /* have we been asked to retune? */
557 if (fepriv->state & FESTATE_RETUNE) {
558 params = &fepriv->parameters;
559 fepriv->state = FESTATE_TUNED;
562 fe->ops->tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
563 if (s != fepriv->status) {
564 dvb_frontend_add_event(fe, s);
568 dvb_frontend_swzigzag(fe);
572 if (dvb_shutdown_timeout) {
573 if (dvb_powerdown_on_sleep)
574 if (fe->ops->set_voltage)
575 fe->ops->set_voltage(fe, SEC_VOLTAGE_OFF);
580 fepriv->thread_pid = 0;
583 dvb_frontend_wakeup(fe);
587 static void dvb_frontend_stop(struct dvb_frontend *fe)
590 struct dvb_frontend_private *fepriv = fe->frontend_priv;
592 dprintk ("%s\n", __FUNCTION__);
597 if (!fepriv->thread_pid)
600 /* check if the thread is really alive */
601 if (kill_proc(fepriv->thread_pid, 0, 1) == -ESRCH) {
602 printk("dvb_frontend_stop: thread PID %d already died\n",
604 /* make sure the mutex was not held by the thread */
605 init_MUTEX (&fepriv->sem);
609 /* wake up the frontend thread, so it notices that fe->exit == 1 */
610 dvb_frontend_wakeup(fe);
612 /* wait until the frontend thread has exited */
613 ret = wait_event_interruptible(fepriv->wait_queue,0 == fepriv->thread_pid);
614 if (-ERESTARTSYS != ret) {
615 fepriv->state = FESTATE_IDLE;
618 fepriv->state = FESTATE_IDLE;
620 /* paranoia check in case a signal arrived */
621 if (fepriv->thread_pid)
622 printk("dvb_frontend_stop: warning: thread PID %d won't exit\n",
626 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
628 return ((curtime.tv_usec < lasttime.tv_usec) ?
629 1000000 - lasttime.tv_usec + curtime.tv_usec :
630 curtime.tv_usec - lasttime.tv_usec);
632 EXPORT_SYMBOL(timeval_usec_diff);
634 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
636 curtime->tv_usec += add_usec;
637 if (curtime->tv_usec >= 1000000) {
638 curtime->tv_usec -= 1000000;
644 * Sleep until gettimeofday() > waketime + add_usec
645 * This needs to be as precise as possible, but as the delay is
646 * usually between 2ms and 32ms, it is done using a scheduled msleep
647 * followed by usleep (normally a busy-wait loop) for the remainder
649 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
651 struct timeval lasttime;
654 timeval_usec_add(waketime, add_usec);
656 do_gettimeofday(&lasttime);
657 delta = timeval_usec_diff(lasttime, *waketime);
659 msleep((delta - 1500) / 1000);
660 do_gettimeofday(&lasttime);
661 newdelta = timeval_usec_diff(lasttime, *waketime);
662 delta = (newdelta > delta) ? 0 : newdelta;
667 EXPORT_SYMBOL(dvb_frontend_sleep_until);
669 static int dvb_frontend_start(struct dvb_frontend *fe)
672 struct dvb_frontend_private *fepriv = fe->frontend_priv;
674 dprintk ("%s\n", __FUNCTION__);
676 if (fepriv->thread_pid) {
680 dvb_frontend_stop (fe);
683 if (signal_pending(current))
685 if (down_interruptible (&fepriv->sem))
688 fepriv->state = FESTATE_IDLE;
690 fepriv->thread_pid = 0;
693 ret = kernel_thread (dvb_frontend_thread, fe, 0);
696 printk("dvb_frontend_start: failed to start kernel_thread (%d)\n", ret);
700 fepriv->thread_pid = ret;
705 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
706 unsigned int cmd, void *parg)
708 struct dvb_device *dvbdev = file->private_data;
709 struct dvb_frontend *fe = dvbdev->priv;
710 struct dvb_frontend_private *fepriv = fe->frontend_priv;
711 int err = -EOPNOTSUPP;
713 dprintk ("%s\n", __FUNCTION__);
715 if (!fe || fepriv->exit)
718 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
719 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
720 cmd == FE_DISEQC_RECV_SLAVE_REPLY))
723 if (down_interruptible (&fepriv->sem))
728 struct dvb_frontend_info* info = parg;
729 memcpy(info, &fe->ops->info, sizeof(struct dvb_frontend_info));
731 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
732 * do it, it is done for it. */
733 info->caps |= FE_CAN_INVERSION_AUTO;
738 case FE_READ_STATUS: {
739 fe_status_t* status = parg;
741 /* if retune was requested but hasn't occured yet, prevent
742 * that user get signal state from previous tuning */
743 if(fepriv->state == FESTATE_RETUNE) {
749 if (fe->ops->read_status)
750 err = fe->ops->read_status(fe, status);
754 if (fe->ops->read_ber)
755 err = fe->ops->read_ber(fe, (__u32*) parg);
758 case FE_READ_SIGNAL_STRENGTH:
759 if (fe->ops->read_signal_strength)
760 err = fe->ops->read_signal_strength(fe, (__u16*) parg);
764 if (fe->ops->read_snr)
765 err = fe->ops->read_snr(fe, (__u16*) parg);
768 case FE_READ_UNCORRECTED_BLOCKS:
769 if (fe->ops->read_ucblocks)
770 err = fe->ops->read_ucblocks(fe, (__u32*) parg);
774 case FE_DISEQC_RESET_OVERLOAD:
775 if (fe->ops->diseqc_reset_overload) {
776 err = fe->ops->diseqc_reset_overload(fe);
777 fepriv->state = FESTATE_DISEQC;
782 case FE_DISEQC_SEND_MASTER_CMD:
783 if (fe->ops->diseqc_send_master_cmd) {
784 err = fe->ops->diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
785 fepriv->state = FESTATE_DISEQC;
790 case FE_DISEQC_SEND_BURST:
791 if (fe->ops->diseqc_send_burst) {
792 err = fe->ops->diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
793 fepriv->state = FESTATE_DISEQC;
799 if (fe->ops->set_tone) {
800 err = fe->ops->set_tone(fe, (fe_sec_tone_mode_t) parg);
801 fepriv->tone = (fe_sec_tone_mode_t) parg;
802 fepriv->state = FESTATE_DISEQC;
808 if (fe->ops->set_voltage) {
809 err = fe->ops->set_voltage(fe, (fe_sec_voltage_t) parg);
810 fepriv->voltage = (fe_sec_voltage_t) parg;
811 fepriv->state = FESTATE_DISEQC;
816 case FE_DISHNETWORK_SEND_LEGACY_CMD:
817 if (fe->ops->dishnetwork_send_legacy_command) {
818 err = fe->ops->dishnetwork_send_legacy_command(fe, (unsigned long) parg);
819 fepriv->state = FESTATE_DISEQC;
821 } else if (fe->ops->set_voltage) {
823 * NOTE: This is a fallback condition. Some frontends
824 * (stv0299 for instance) take longer than 8msec to
825 * respond to a set_voltage command. Those switches
826 * need custom routines to switch properly. For all
827 * other frontends, the following shoule work ok.
828 * Dish network legacy switches (as used by Dish500)
829 * are controlled by sending 9-bit command words
830 * spaced 8msec apart.
831 * the actual command word is switch/port dependant
832 * so it is up to the userspace application to send
834 * The command must always start with a '0' after
835 * initialization, so parg is 8 bits and does not
836 * include the initialization or start bit
838 unsigned long cmd = ((unsigned long) parg) << 1;
839 struct timeval nexttime;
840 struct timeval tv[10];
843 if (dvb_frontend_debug)
844 printk("%s switch command: 0x%04lx\n", __FUNCTION__, cmd);
845 do_gettimeofday(&nexttime);
846 if (dvb_frontend_debug)
847 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
848 /* before sending a command, initialize by sending
849 * a 32ms 18V to the switch
851 fe->ops->set_voltage(fe, SEC_VOLTAGE_18);
852 dvb_frontend_sleep_until(&nexttime, 32000);
854 for (i = 0; i < 9; i++) {
855 if (dvb_frontend_debug)
856 do_gettimeofday(&tv[i + 1]);
857 if ((cmd & 0x01) != last) {
858 /* set voltage to (last ? 13V : 18V) */
859 fe->ops->set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
860 last = (last) ? 0 : 1;
864 dvb_frontend_sleep_until(&nexttime, 8000);
866 if (dvb_frontend_debug) {
867 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
868 __FUNCTION__, fe->dvb->num);
869 for (i = 1; i < 10; i++)
870 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
873 fepriv->state = FESTATE_DISEQC;
878 case FE_DISEQC_RECV_SLAVE_REPLY:
879 if (fe->ops->diseqc_recv_slave_reply)
880 err = fe->ops->diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
883 case FE_ENABLE_HIGH_LNB_VOLTAGE:
884 if (fe->ops->enable_high_lnb_voltage)
885 err = fe->ops->enable_high_lnb_voltage(fe, (long) parg);
888 case FE_SET_FRONTEND: {
889 struct dvb_frontend_tune_settings fetunesettings;
891 memcpy (&fepriv->parameters, parg,
892 sizeof (struct dvb_frontend_parameters));
894 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
895 memcpy(&fetunesettings.parameters, parg,
896 sizeof (struct dvb_frontend_parameters));
898 /* force auto frequency inversion if requested */
899 if (dvb_force_auto_inversion) {
900 fepriv->parameters.inversion = INVERSION_AUTO;
901 fetunesettings.parameters.inversion = INVERSION_AUTO;
903 if (fe->ops->info.type == FE_OFDM) {
904 /* without hierachical coding code_rate_LP is irrelevant,
905 * so we tolerate the otherwise invalid FEC_NONE setting */
906 if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
907 fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
908 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
911 /* get frontend-specific tuning settings */
912 if (fe->ops->get_tune_settings && (fe->ops->get_tune_settings(fe, &fetunesettings) == 0)) {
913 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
914 fepriv->max_drift = fetunesettings.max_drift;
915 fepriv->step_size = fetunesettings.step_size;
918 switch(fe->ops->info.type) {
920 fepriv->min_delay = HZ/20;
921 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
922 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
926 fepriv->min_delay = HZ/20;
927 fepriv->step_size = 0; /* no zigzag */
928 fepriv->max_drift = 0;
932 fepriv->min_delay = HZ/20;
933 fepriv->step_size = fe->ops->info.frequency_stepsize * 2;
934 fepriv->max_drift = (fe->ops->info.frequency_stepsize * 2) + 1;
937 printk("dvb-core: FE_ATSC not handled yet.\n");
941 if (dvb_override_tune_delay > 0)
942 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
944 fepriv->state = FESTATE_RETUNE;
945 dvb_frontend_wakeup(fe);
946 dvb_frontend_add_event(fe, 0);
953 err = dvb_frontend_get_event (fe, parg, file->f_flags);
956 case FE_GET_FRONTEND:
957 if (fe->ops->get_frontend) {
958 memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
959 err = fe->ops->get_frontend(fe, (struct dvb_frontend_parameters*) parg);
963 case FE_SET_FRONTEND_TUNE_MODE:
964 fepriv->tune_mode_flags = (unsigned long) parg;
972 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
974 struct dvb_device *dvbdev = file->private_data;
975 struct dvb_frontend *fe = dvbdev->priv;
976 struct dvb_frontend_private *fepriv = fe->frontend_priv;
978 dprintk ("%s\n", __FUNCTION__);
980 poll_wait (file, &fepriv->events.wait_queue, wait);
982 if (fepriv->events.eventw != fepriv->events.eventr)
983 return (POLLIN | POLLRDNORM | POLLPRI);
988 static int dvb_frontend_open(struct inode *inode, struct file *file)
990 struct dvb_device *dvbdev = file->private_data;
991 struct dvb_frontend *fe = dvbdev->priv;
992 struct dvb_frontend_private *fepriv = fe->frontend_priv;
995 dprintk ("%s\n", __FUNCTION__);
997 if ((ret = dvb_generic_open (inode, file)) < 0)
1000 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1001 /* normal tune mode when opened R/W */
1002 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1004 fepriv->voltage = -1;
1006 ret = dvb_frontend_start (fe);
1008 dvb_generic_release (inode, file);
1010 /* empty event queue */
1011 fepriv->events.eventr = fepriv->events.eventw = 0;
1017 static int dvb_frontend_release(struct inode *inode, struct file *file)
1019 struct dvb_device *dvbdev = file->private_data;
1020 struct dvb_frontend *fe = dvbdev->priv;
1021 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1023 dprintk ("%s\n", __FUNCTION__);
1025 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
1026 fepriv->release_jiffies = jiffies;
1028 return dvb_generic_release (inode, file);
1031 static struct file_operations dvb_frontend_fops = {
1032 .owner = THIS_MODULE,
1033 .ioctl = dvb_generic_ioctl,
1034 .poll = dvb_frontend_poll,
1035 .open = dvb_frontend_open,
1036 .release = dvb_frontend_release
1039 int dvb_register_frontend(struct dvb_adapter* dvb,
1040 struct dvb_frontend* fe)
1042 struct dvb_frontend_private *fepriv;
1043 static const struct dvb_device dvbdev_template = {
1047 .fops = &dvb_frontend_fops,
1048 .kernel_ioctl = dvb_frontend_ioctl
1051 dprintk ("%s\n", __FUNCTION__);
1053 if (mutex_lock_interruptible(&frontend_mutex))
1054 return -ERESTARTSYS;
1056 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
1057 if (fe->frontend_priv == NULL) {
1058 mutex_unlock(&frontend_mutex);
1061 fepriv = fe->frontend_priv;
1063 init_MUTEX (&fepriv->sem);
1064 init_waitqueue_head (&fepriv->wait_queue);
1065 init_waitqueue_head (&fepriv->events.wait_queue);
1066 init_MUTEX (&fepriv->events.sem);
1068 fepriv->inversion = INVERSION_OFF;
1070 printk ("DVB: registering frontend %i (%s)...\n",
1072 fe->ops->info.name);
1074 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
1075 fe, DVB_DEVICE_FRONTEND);
1077 mutex_unlock(&frontend_mutex);
1080 EXPORT_SYMBOL(dvb_register_frontend);
1082 int dvb_unregister_frontend(struct dvb_frontend* fe)
1084 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1085 dprintk ("%s\n", __FUNCTION__);
1087 mutex_lock(&frontend_mutex);
1088 dvb_unregister_device (fepriv->dvbdev);
1089 dvb_frontend_stop (fe);
1090 if (fe->ops->release)
1091 fe->ops->release(fe);
1093 printk("dvb_frontend: Demodulator (%s) does not have a release callback!\n", fe->ops->info.name);
1094 /* fe is invalid now */
1096 mutex_unlock(&frontend_mutex);
1099 EXPORT_SYMBOL(dvb_unregister_frontend);