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 <asm/processor.h>
45 #include "dvb_frontend.h"
47 #include <linux/dvb/version.h>
49 static int dvb_frontend_debug;
50 static int dvb_shutdown_timeout;
51 static int dvb_force_auto_inversion;
52 static int dvb_override_tune_delay;
53 static int dvb_powerdown_on_sleep = 1;
54 static int dvb_mfe_wait_time = 5;
56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
58 module_param(dvb_shutdown_timeout, int, 0644);
59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
60 module_param(dvb_force_auto_inversion, int, 0644);
61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
62 module_param(dvb_override_tune_delay, int, 0644);
63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
64 module_param(dvb_powerdown_on_sleep, int, 0644);
65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
66 module_param(dvb_mfe_wait_time, int, 0644);
67 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)");
69 #define FESTATE_IDLE 1
70 #define FESTATE_RETUNE 2
71 #define FESTATE_TUNING_FAST 4
72 #define FESTATE_TUNING_SLOW 8
73 #define FESTATE_TUNED 16
74 #define FESTATE_ZIGZAG_FAST 32
75 #define FESTATE_ZIGZAG_SLOW 64
76 #define FESTATE_DISEQC 128
77 #define FESTATE_ERROR 256
78 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
79 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
80 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
81 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
85 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
86 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
87 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
88 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
89 * FESTATE_TUNED. The frontend has successfully locked on.
90 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
91 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
92 * FESTATE_DISEQC. A DISEQC command has just been issued.
93 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
94 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
95 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
96 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
99 #define DVB_FE_NO_EXIT 0
100 #define DVB_FE_NORMAL_EXIT 1
101 #define DVB_FE_DEVICE_REMOVED 2
103 static DEFINE_MUTEX(frontend_mutex);
105 struct dvb_frontend_private {
107 /* thread/frontend values */
108 struct dvb_device *dvbdev;
109 struct dvb_frontend_parameters parameters_out;
110 struct dvb_fe_events events;
111 struct semaphore sem;
112 struct list_head list_head;
113 wait_queue_head_t wait_queue;
114 struct task_struct *thread;
115 unsigned long release_jiffies;
119 unsigned long tune_mode_flags;
121 unsigned int reinitialise;
125 /* swzigzag values */
127 unsigned int bending;
129 unsigned int inversion;
130 unsigned int auto_step;
131 unsigned int auto_sub_step;
132 unsigned int started_auto_step;
133 unsigned int min_delay;
134 unsigned int max_drift;
135 unsigned int step_size;
137 unsigned int check_wrapped;
138 enum dvbfe_search algo_status;
141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
142 static int dtv_get_frontend(struct dvb_frontend *fe,
143 struct dvb_frontend_parameters *p_out);
144 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
145 struct dvb_frontend_parameters *p);
147 static bool has_get_frontend(struct dvb_frontend *fe)
149 return fe->ops.get_frontend != NULL;
153 * Due to DVBv3 API calls, a delivery system should be mapped into one of
154 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
155 * otherwise, a DVBv3 call will fail.
157 enum dvbv3_emulation_type {
165 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
167 switch (delivery_system) {
168 case SYS_DVBC_ANNEX_A:
169 case SYS_DVBC_ANNEX_C:
184 case SYS_DVBC_ANNEX_B:
192 * Doesn't know how to emulate those types and/or
193 * there's no frontend driver from this type yet
194 * with some emulation code, so, we're not sure yet how
195 * to handle them, or they're not compatible with a DVBv3 call.
197 return DVBV3_UNKNOWN;
201 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
203 struct dvb_frontend_private *fepriv = fe->frontend_priv;
204 struct dvb_fe_events *events = &fepriv->events;
205 struct dvb_frontend_event *e;
208 dev_dbg(fe->dvb->device, "%s:\n", __func__);
210 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
211 dtv_get_frontend(fe, &fepriv->parameters_out);
213 mutex_lock(&events->mtx);
215 wp = (events->eventw + 1) % MAX_EVENT;
216 if (wp == events->eventr) {
217 events->overflow = 1;
218 events->eventr = (events->eventr + 1) % MAX_EVENT;
221 e = &events->events[events->eventw];
223 e->parameters = fepriv->parameters_out;
227 mutex_unlock(&events->mtx);
229 wake_up_interruptible (&events->wait_queue);
232 static int dvb_frontend_get_event(struct dvb_frontend *fe,
233 struct dvb_frontend_event *event, int flags)
235 struct dvb_frontend_private *fepriv = fe->frontend_priv;
236 struct dvb_fe_events *events = &fepriv->events;
238 dev_dbg(fe->dvb->device, "%s:\n", __func__);
240 if (events->overflow) {
241 events->overflow = 0;
245 if (events->eventw == events->eventr) {
248 if (flags & O_NONBLOCK)
253 ret = wait_event_interruptible (events->wait_queue,
254 events->eventw != events->eventr);
256 if (down_interruptible (&fepriv->sem))
263 mutex_lock(&events->mtx);
264 *event = events->events[events->eventr];
265 events->eventr = (events->eventr + 1) % MAX_EVENT;
266 mutex_unlock(&events->mtx);
271 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
273 struct dvb_frontend_private *fepriv = fe->frontend_priv;
274 struct dvb_fe_events *events = &fepriv->events;
276 mutex_lock(&events->mtx);
277 events->eventr = events->eventw;
278 mutex_unlock(&events->mtx);
281 static void dvb_frontend_init(struct dvb_frontend *fe)
283 dev_dbg(fe->dvb->device,
284 "%s: initialising adapter %i frontend %i (%s)...\n",
285 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
289 if (fe->ops.tuner_ops.init) {
290 if (fe->ops.i2c_gate_ctrl)
291 fe->ops.i2c_gate_ctrl(fe, 1);
292 fe->ops.tuner_ops.init(fe);
293 if (fe->ops.i2c_gate_ctrl)
294 fe->ops.i2c_gate_ctrl(fe, 0);
298 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
300 struct dvb_frontend_private *fepriv = fe->frontend_priv;
302 fepriv->reinitialise = 1;
303 dvb_frontend_wakeup(fe);
305 EXPORT_SYMBOL(dvb_frontend_reinitialise);
307 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
310 struct dvb_frontend *fe = fepriv->dvbdev->priv;
312 dev_dbg(fe->dvb->device, "%s:\n", __func__);
315 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
317 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
319 q2 = fepriv->quality - 128;
322 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
326 * Performs automatic twiddling of frontend parameters.
328 * @param fe The frontend concerned.
329 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
330 * @returns Number of complete iterations that have been performed.
332 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
337 struct dvb_frontend_private *fepriv = fe->frontend_priv;
338 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
339 int original_inversion = c->inversion;
340 u32 original_frequency = c->frequency;
342 /* are we using autoinversion? */
343 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
344 (c->inversion == INVERSION_AUTO));
346 /* setup parameters correctly */
348 /* calculate the lnb_drift */
349 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
351 /* wrap the auto_step if we've exceeded the maximum drift */
352 if (fepriv->lnb_drift > fepriv->max_drift) {
353 fepriv->auto_step = 0;
354 fepriv->auto_sub_step = 0;
355 fepriv->lnb_drift = 0;
358 /* perform inversion and +/- zigzag */
359 switch(fepriv->auto_sub_step) {
361 /* try with the current inversion and current drift setting */
366 if (!autoinversion) break;
368 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
373 if (fepriv->lnb_drift == 0) break;
375 fepriv->lnb_drift = -fepriv->lnb_drift;
380 if (fepriv->lnb_drift == 0) break;
381 if (!autoinversion) break;
383 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
384 fepriv->lnb_drift = -fepriv->lnb_drift;
390 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
394 if (!ready) fepriv->auto_sub_step++;
397 /* if this attempt would hit where we started, indicate a complete
398 * iteration has occurred */
399 if ((fepriv->auto_step == fepriv->started_auto_step) &&
400 (fepriv->auto_sub_step == 0) && check_wrapped) {
404 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
405 "auto_sub_step:%i started_auto_step:%i\n",
406 __func__, fepriv->lnb_drift, fepriv->inversion,
407 fepriv->auto_step, fepriv->auto_sub_step,
408 fepriv->started_auto_step);
410 /* set the frontend itself */
411 c->frequency += fepriv->lnb_drift;
413 c->inversion = fepriv->inversion;
415 if (fe->ops.set_frontend)
416 fe_set_err = fe->ops.set_frontend(fe);
418 if (fe_set_err < 0) {
419 fepriv->state = FESTATE_ERROR;
423 c->frequency = original_frequency;
424 c->inversion = original_inversion;
426 fepriv->auto_sub_step++;
430 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
434 struct dvb_frontend_private *fepriv = fe->frontend_priv;
435 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
437 /* if we've got no parameters, just keep idling */
438 if (fepriv->state & FESTATE_IDLE) {
439 fepriv->delay = 3*HZ;
444 /* in SCAN mode, we just set the frontend when asked and leave it alone */
445 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
446 if (fepriv->state & FESTATE_RETUNE) {
448 if (fe->ops.set_frontend)
449 retval = fe->ops.set_frontend(fe);
452 fepriv->state = FESTATE_ERROR;
454 fepriv->state = FESTATE_TUNED;
456 fepriv->delay = 3*HZ;
461 /* get the frontend status */
462 if (fepriv->state & FESTATE_RETUNE) {
465 if (fe->ops.read_status)
466 fe->ops.read_status(fe, &s);
467 if (s != fepriv->status) {
468 dvb_frontend_add_event(fe, s);
473 /* if we're not tuned, and we have a lock, move to the TUNED state */
474 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
475 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
476 fepriv->state = FESTATE_TUNED;
478 /* if we're tuned, then we have determined the correct inversion */
479 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
480 (c->inversion == INVERSION_AUTO)) {
481 c->inversion = fepriv->inversion;
486 /* if we are tuned already, check we're still locked */
487 if (fepriv->state & FESTATE_TUNED) {
488 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
490 /* we're tuned, and the lock is still good... */
491 if (s & FE_HAS_LOCK) {
493 } else { /* if we _WERE_ tuned, but now don't have a lock */
494 fepriv->state = FESTATE_ZIGZAG_FAST;
495 fepriv->started_auto_step = fepriv->auto_step;
496 fepriv->check_wrapped = 0;
500 /* don't actually do anything if we're in the LOSTLOCK state,
501 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
502 if ((fepriv->state & FESTATE_LOSTLOCK) &&
503 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
504 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
508 /* don't do anything if we're in the DISEQC state, since this
509 * might be someone with a motorized dish controlled by DISEQC.
510 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
511 if (fepriv->state & FESTATE_DISEQC) {
512 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
516 /* if we're in the RETUNE state, set everything up for a brand
517 * new scan, keeping the current inversion setting, as the next
518 * tune is _very_ likely to require the same */
519 if (fepriv->state & FESTATE_RETUNE) {
520 fepriv->lnb_drift = 0;
521 fepriv->auto_step = 0;
522 fepriv->auto_sub_step = 0;
523 fepriv->started_auto_step = 0;
524 fepriv->check_wrapped = 0;
528 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
529 fepriv->delay = fepriv->min_delay;
532 retval = dvb_frontend_swzigzag_autotune(fe,
533 fepriv->check_wrapped);
537 /* OK, if we've run out of trials at the fast speed.
538 * Drop back to slow for the _next_ attempt */
539 fepriv->state = FESTATE_SEARCHING_SLOW;
540 fepriv->started_auto_step = fepriv->auto_step;
543 fepriv->check_wrapped = 1;
545 /* if we've just retuned, enter the ZIGZAG_FAST state.
546 * This ensures we cannot return from an
547 * FE_SET_FRONTEND ioctl before the first frontend tune
549 if (fepriv->state & FESTATE_RETUNE) {
550 fepriv->state = FESTATE_TUNING_FAST;
555 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
556 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
558 /* Note: don't bother checking for wrapping; we stay in this
559 * state until we get a lock */
560 dvb_frontend_swzigzag_autotune(fe, 0);
564 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
566 struct dvb_frontend_private *fepriv = fe->frontend_priv;
568 if (fepriv->exit != DVB_FE_NO_EXIT)
571 if (fepriv->dvbdev->writers == 1)
572 if (time_after_eq(jiffies, fepriv->release_jiffies +
573 dvb_shutdown_timeout * HZ))
579 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
581 struct dvb_frontend_private *fepriv = fe->frontend_priv;
583 if (fepriv->wakeup) {
587 return dvb_frontend_is_exiting(fe);
590 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
592 struct dvb_frontend_private *fepriv = fe->frontend_priv;
595 wake_up_interruptible(&fepriv->wait_queue);
598 static int dvb_frontend_thread(void *data)
600 struct dvb_frontend *fe = data;
601 struct dvb_frontend_private *fepriv = fe->frontend_priv;
603 enum dvbfe_algo algo;
605 bool re_tune = false;
606 bool semheld = false;
608 dev_dbg(fe->dvb->device, "%s:\n", __func__);
610 fepriv->check_wrapped = 0;
612 fepriv->delay = 3*HZ;
615 fepriv->reinitialise = 0;
617 dvb_frontend_init(fe);
621 up(&fepriv->sem); /* is locked when we enter the thread... */
623 wait_event_interruptible_timeout(fepriv->wait_queue,
624 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
625 || freezing(current),
628 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
629 /* got signal or quitting */
630 if (!down_interruptible(&fepriv->sem))
632 fepriv->exit = DVB_FE_NORMAL_EXIT;
639 if (down_interruptible(&fepriv->sem))
642 if (fepriv->reinitialise) {
643 dvb_frontend_init(fe);
644 if (fe->ops.set_tone && fepriv->tone != -1)
645 fe->ops.set_tone(fe, fepriv->tone);
646 if (fe->ops.set_voltage && fepriv->voltage != -1)
647 fe->ops.set_voltage(fe, fepriv->voltage);
648 fepriv->reinitialise = 0;
651 /* do an iteration of the tuning loop */
652 if (fe->ops.get_frontend_algo) {
653 algo = fe->ops.get_frontend_algo(fe);
656 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
658 if (fepriv->state & FESTATE_RETUNE) {
659 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
661 fepriv->state = FESTATE_TUNED;
667 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
669 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
670 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
671 dvb_frontend_add_event(fe, s);
676 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
677 dvb_frontend_swzigzag(fe);
679 case DVBFE_ALGO_CUSTOM:
680 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
681 if (fepriv->state & FESTATE_RETUNE) {
682 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
683 fepriv->state = FESTATE_TUNED;
685 /* Case where we are going to search for a carrier
686 * User asked us to retune again for some reason, possibly
687 * requesting a search with a new set of parameters
689 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
690 if (fe->ops.search) {
691 fepriv->algo_status = fe->ops.search(fe);
692 /* We did do a search as was requested, the flags are
693 * now unset as well and has the flags wrt to search.
696 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
699 /* Track the carrier if the search was successful */
700 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
701 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
702 fepriv->delay = HZ / 2;
704 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
705 fe->ops.read_status(fe, &s);
706 if (s != fepriv->status) {
707 dvb_frontend_add_event(fe, s); /* update event list */
709 if (!(s & FE_HAS_LOCK)) {
710 fepriv->delay = HZ / 10;
711 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
713 fepriv->delay = 60 * HZ;
718 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
722 dvb_frontend_swzigzag(fe);
726 if (dvb_powerdown_on_sleep) {
727 if (fe->ops.set_voltage)
728 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
729 if (fe->ops.tuner_ops.sleep) {
730 if (fe->ops.i2c_gate_ctrl)
731 fe->ops.i2c_gate_ctrl(fe, 1);
732 fe->ops.tuner_ops.sleep(fe);
733 if (fe->ops.i2c_gate_ctrl)
734 fe->ops.i2c_gate_ctrl(fe, 0);
740 fepriv->thread = NULL;
741 if (kthread_should_stop())
742 fepriv->exit = DVB_FE_DEVICE_REMOVED;
744 fepriv->exit = DVB_FE_NO_EXIT;
749 dvb_frontend_wakeup(fe);
753 static void dvb_frontend_stop(struct dvb_frontend *fe)
755 struct dvb_frontend_private *fepriv = fe->frontend_priv;
757 dev_dbg(fe->dvb->device, "%s:\n", __func__);
759 fepriv->exit = DVB_FE_NORMAL_EXIT;
765 kthread_stop(fepriv->thread);
767 sema_init(&fepriv->sem, 1);
768 fepriv->state = FESTATE_IDLE;
770 /* paranoia check in case a signal arrived */
772 dev_warn(fe->dvb->device,
773 "dvb_frontend_stop: warning: thread %p won't exit\n",
777 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
779 return ((curtime.tv_usec < lasttime.tv_usec) ?
780 1000000 - lasttime.tv_usec + curtime.tv_usec :
781 curtime.tv_usec - lasttime.tv_usec);
783 EXPORT_SYMBOL(timeval_usec_diff);
785 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
787 curtime->tv_usec += add_usec;
788 if (curtime->tv_usec >= 1000000) {
789 curtime->tv_usec -= 1000000;
795 * Sleep until gettimeofday() > waketime + add_usec
796 * This needs to be as precise as possible, but as the delay is
797 * usually between 2ms and 32ms, it is done using a scheduled msleep
798 * followed by usleep (normally a busy-wait loop) for the remainder
800 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
802 struct timeval lasttime;
805 timeval_usec_add(waketime, add_usec);
807 do_gettimeofday(&lasttime);
808 delta = timeval_usec_diff(lasttime, *waketime);
810 msleep((delta - 1500) / 1000);
811 do_gettimeofday(&lasttime);
812 newdelta = timeval_usec_diff(lasttime, *waketime);
813 delta = (newdelta > delta) ? 0 : newdelta;
818 EXPORT_SYMBOL(dvb_frontend_sleep_until);
820 static int dvb_frontend_start(struct dvb_frontend *fe)
823 struct dvb_frontend_private *fepriv = fe->frontend_priv;
824 struct task_struct *fe_thread;
826 dev_dbg(fe->dvb->device, "%s:\n", __func__);
828 if (fepriv->thread) {
829 if (fepriv->exit == DVB_FE_NO_EXIT)
832 dvb_frontend_stop (fe);
835 if (signal_pending(current))
837 if (down_interruptible (&fepriv->sem))
840 fepriv->state = FESTATE_IDLE;
841 fepriv->exit = DVB_FE_NO_EXIT;
842 fepriv->thread = NULL;
845 fe_thread = kthread_run(dvb_frontend_thread, fe,
846 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
847 if (IS_ERR(fe_thread)) {
848 ret = PTR_ERR(fe_thread);
849 dev_warn(fe->dvb->device,
850 "dvb_frontend_start: failed to start kthread (%d)\n",
855 fepriv->thread = fe_thread;
859 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
860 u32 *freq_min, u32 *freq_max)
862 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
864 if (fe->ops.info.frequency_max == 0)
865 *freq_max = fe->ops.tuner_ops.info.frequency_max;
866 else if (fe->ops.tuner_ops.info.frequency_max == 0)
867 *freq_max = fe->ops.info.frequency_max;
869 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
871 if (*freq_min == 0 || *freq_max == 0)
872 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
873 fe->dvb->num, fe->id);
876 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
878 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
882 /* range check: frequency */
883 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
884 if ((freq_min && c->frequency < freq_min) ||
885 (freq_max && c->frequency > freq_max)) {
886 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
887 fe->dvb->num, fe->id, c->frequency,
892 /* range check: symbol rate */
893 switch (c->delivery_system) {
897 case SYS_DVBC_ANNEX_A:
898 case SYS_DVBC_ANNEX_C:
899 if ((fe->ops.info.symbol_rate_min &&
900 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
901 (fe->ops.info.symbol_rate_max &&
902 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
903 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
904 fe->dvb->num, fe->id, c->symbol_rate,
905 fe->ops.info.symbol_rate_min,
906 fe->ops.info.symbol_rate_max);
916 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
918 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
922 delsys = c->delivery_system;
923 memset(c, 0, sizeof(struct dtv_frontend_properties));
924 c->delivery_system = delsys;
926 c->state = DTV_CLEAR;
928 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
929 __func__, c->delivery_system);
931 c->transmission_mode = TRANSMISSION_MODE_AUTO;
932 c->bandwidth_hz = 0; /* AUTO */
933 c->guard_interval = GUARD_INTERVAL_AUTO;
934 c->hierarchy = HIERARCHY_AUTO;
936 c->code_rate_HP = FEC_AUTO;
937 c->code_rate_LP = FEC_AUTO;
938 c->fec_inner = FEC_AUTO;
939 c->rolloff = ROLLOFF_AUTO;
940 c->voltage = SEC_VOLTAGE_OFF;
941 c->sectone = SEC_TONE_OFF;
942 c->pilot = PILOT_AUTO;
944 c->isdbt_partial_reception = 0;
945 c->isdbt_sb_mode = 0;
946 c->isdbt_sb_subchannel = 0;
947 c->isdbt_sb_segment_idx = 0;
948 c->isdbt_sb_segment_count = 0;
949 c->isdbt_layer_enabled = 0;
950 for (i = 0; i < 3; i++) {
951 c->layer[i].fec = FEC_AUTO;
952 c->layer[i].modulation = QAM_AUTO;
953 c->layer[i].interleaving = 0;
954 c->layer[i].segment_count = 0;
957 c->stream_id = NO_STREAM_ID_FILTER;
959 switch (c->delivery_system) {
963 c->modulation = QPSK; /* implied for DVB-S in legacy API */
964 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
967 c->modulation = VSB_8;
970 c->modulation = QAM_AUTO;
979 #define _DTV_CMD(n, s, b) \
987 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
988 _DTV_CMD(DTV_TUNE, 1, 0),
989 _DTV_CMD(DTV_CLEAR, 1, 0),
992 _DTV_CMD(DTV_FREQUENCY, 1, 0),
993 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
994 _DTV_CMD(DTV_MODULATION, 1, 0),
995 _DTV_CMD(DTV_INVERSION, 1, 0),
996 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
997 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
998 _DTV_CMD(DTV_INNER_FEC, 1, 0),
999 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1000 _DTV_CMD(DTV_TONE, 1, 0),
1001 _DTV_CMD(DTV_PILOT, 1, 0),
1002 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1003 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1004 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1005 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1006 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1007 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1008 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1009 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1011 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1012 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1013 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1014 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1015 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1016 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1017 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1018 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1019 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1020 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1021 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1022 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1023 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1024 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1025 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1026 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1027 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1028 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1030 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1031 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1032 _DTV_CMD(DTV_LNA, 1, 0),
1035 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1036 _DTV_CMD(DTV_API_VERSION, 0, 0),
1038 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1040 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1041 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1043 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1044 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1045 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1046 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1047 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1048 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1049 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1050 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1051 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1052 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1053 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1054 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1055 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1057 /* Statistics API */
1058 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1059 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1060 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1061 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1062 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1063 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1064 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1065 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1068 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1072 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1073 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1074 __func__, tvp->cmd);
1078 dev_dbg(fe->dvb->device, "%s: tvp.cmd = 0x%08x (%s)\n", __func__,
1079 tvp->cmd, dtv_cmds[tvp->cmd].name);
1081 if (dtv_cmds[tvp->cmd].buffer) {
1082 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1083 __func__, tvp->u.buffer.len);
1085 for(i = 0; i < tvp->u.buffer.len; i++)
1086 dev_dbg(fe->dvb->device,
1087 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1088 __func__, i, tvp->u.buffer.data[i]);
1090 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1095 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1096 * drivers can use a single set_frontend tuning function, regardless of whether
1097 * it's being used for the legacy or new API, reducing code and complexity.
1099 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1100 struct dtv_frontend_properties *c,
1101 const struct dvb_frontend_parameters *p)
1103 c->frequency = p->frequency;
1104 c->inversion = p->inversion;
1106 switch (dvbv3_type(c->delivery_system)) {
1108 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1109 c->symbol_rate = p->u.qpsk.symbol_rate;
1110 c->fec_inner = p->u.qpsk.fec_inner;
1113 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1114 c->symbol_rate = p->u.qam.symbol_rate;
1115 c->fec_inner = p->u.qam.fec_inner;
1116 c->modulation = p->u.qam.modulation;
1119 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1121 switch (p->u.ofdm.bandwidth) {
1122 case BANDWIDTH_10_MHZ:
1123 c->bandwidth_hz = 10000000;
1125 case BANDWIDTH_8_MHZ:
1126 c->bandwidth_hz = 8000000;
1128 case BANDWIDTH_7_MHZ:
1129 c->bandwidth_hz = 7000000;
1131 case BANDWIDTH_6_MHZ:
1132 c->bandwidth_hz = 6000000;
1134 case BANDWIDTH_5_MHZ:
1135 c->bandwidth_hz = 5000000;
1137 case BANDWIDTH_1_712_MHZ:
1138 c->bandwidth_hz = 1712000;
1140 case BANDWIDTH_AUTO:
1141 c->bandwidth_hz = 0;
1144 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1145 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1146 c->modulation = p->u.ofdm.constellation;
1147 c->transmission_mode = p->u.ofdm.transmission_mode;
1148 c->guard_interval = p->u.ofdm.guard_interval;
1149 c->hierarchy = p->u.ofdm.hierarchy_information;
1152 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1153 c->modulation = p->u.vsb.modulation;
1154 if (c->delivery_system == SYS_ATSCMH)
1156 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1157 c->delivery_system = SYS_ATSC;
1159 c->delivery_system = SYS_DVBC_ANNEX_B;
1162 dev_err(fe->dvb->device,
1163 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1164 __func__, c->delivery_system);
1171 /* Ensure the cached values are set correctly in the frontend
1172 * legacy tuning structures, for the advanced tuning API.
1174 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1175 struct dvb_frontend_parameters *p)
1177 const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1179 p->frequency = c->frequency;
1180 p->inversion = c->inversion;
1182 switch (dvbv3_type(c->delivery_system)) {
1184 dev_err(fe->dvb->device,
1185 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1186 __func__, c->delivery_system);
1189 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1190 p->u.qpsk.symbol_rate = c->symbol_rate;
1191 p->u.qpsk.fec_inner = c->fec_inner;
1194 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1195 p->u.qam.symbol_rate = c->symbol_rate;
1196 p->u.qam.fec_inner = c->fec_inner;
1197 p->u.qam.modulation = c->modulation;
1200 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1201 switch (c->bandwidth_hz) {
1203 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1206 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1209 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1212 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1215 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1218 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1222 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1224 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1225 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1226 p->u.ofdm.constellation = c->modulation;
1227 p->u.ofdm.transmission_mode = c->transmission_mode;
1228 p->u.ofdm.guard_interval = c->guard_interval;
1229 p->u.ofdm.hierarchy_information = c->hierarchy;
1232 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1233 p->u.vsb.modulation = c->modulation;
1240 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1241 * @fe: struct dvb_frontend pointer
1242 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1243 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1245 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1246 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1247 * If p_out is not null, it will update the DVBv3 params pointed by it.
1249 static int dtv_get_frontend(struct dvb_frontend *fe,
1250 struct dvb_frontend_parameters *p_out)
1254 if (fe->ops.get_frontend) {
1255 r = fe->ops.get_frontend(fe);
1256 if (unlikely(r < 0))
1259 dtv_property_legacy_params_sync(fe, p_out);
1263 /* As everything is in cache, get_frontend fops are always supported */
1267 static int dvb_frontend_ioctl_legacy(struct file *file,
1268 unsigned int cmd, void *parg);
1269 static int dvb_frontend_ioctl_properties(struct file *file,
1270 unsigned int cmd, void *parg);
1272 static int dtv_property_process_get(struct dvb_frontend *fe,
1273 const struct dtv_frontend_properties *c,
1274 struct dtv_property *tvp,
1280 case DTV_ENUM_DELSYS:
1282 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1283 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1286 tvp->u.buffer.len = ncaps;
1289 tvp->u.data = c->frequency;
1291 case DTV_MODULATION:
1292 tvp->u.data = c->modulation;
1294 case DTV_BANDWIDTH_HZ:
1295 tvp->u.data = c->bandwidth_hz;
1298 tvp->u.data = c->inversion;
1300 case DTV_SYMBOL_RATE:
1301 tvp->u.data = c->symbol_rate;
1304 tvp->u.data = c->fec_inner;
1307 tvp->u.data = c->pilot;
1310 tvp->u.data = c->rolloff;
1312 case DTV_DELIVERY_SYSTEM:
1313 tvp->u.data = c->delivery_system;
1316 tvp->u.data = c->voltage;
1319 tvp->u.data = c->sectone;
1321 case DTV_API_VERSION:
1322 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1324 case DTV_CODE_RATE_HP:
1325 tvp->u.data = c->code_rate_HP;
1327 case DTV_CODE_RATE_LP:
1328 tvp->u.data = c->code_rate_LP;
1330 case DTV_GUARD_INTERVAL:
1331 tvp->u.data = c->guard_interval;
1333 case DTV_TRANSMISSION_MODE:
1334 tvp->u.data = c->transmission_mode;
1337 tvp->u.data = c->hierarchy;
1339 case DTV_INTERLEAVING:
1340 tvp->u.data = c->interleaving;
1343 /* ISDB-T Support here */
1344 case DTV_ISDBT_PARTIAL_RECEPTION:
1345 tvp->u.data = c->isdbt_partial_reception;
1347 case DTV_ISDBT_SOUND_BROADCASTING:
1348 tvp->u.data = c->isdbt_sb_mode;
1350 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1351 tvp->u.data = c->isdbt_sb_subchannel;
1353 case DTV_ISDBT_SB_SEGMENT_IDX:
1354 tvp->u.data = c->isdbt_sb_segment_idx;
1356 case DTV_ISDBT_SB_SEGMENT_COUNT:
1357 tvp->u.data = c->isdbt_sb_segment_count;
1359 case DTV_ISDBT_LAYER_ENABLED:
1360 tvp->u.data = c->isdbt_layer_enabled;
1362 case DTV_ISDBT_LAYERA_FEC:
1363 tvp->u.data = c->layer[0].fec;
1365 case DTV_ISDBT_LAYERA_MODULATION:
1366 tvp->u.data = c->layer[0].modulation;
1368 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1369 tvp->u.data = c->layer[0].segment_count;
1371 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1372 tvp->u.data = c->layer[0].interleaving;
1374 case DTV_ISDBT_LAYERB_FEC:
1375 tvp->u.data = c->layer[1].fec;
1377 case DTV_ISDBT_LAYERB_MODULATION:
1378 tvp->u.data = c->layer[1].modulation;
1380 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1381 tvp->u.data = c->layer[1].segment_count;
1383 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1384 tvp->u.data = c->layer[1].interleaving;
1386 case DTV_ISDBT_LAYERC_FEC:
1387 tvp->u.data = c->layer[2].fec;
1389 case DTV_ISDBT_LAYERC_MODULATION:
1390 tvp->u.data = c->layer[2].modulation;
1392 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1393 tvp->u.data = c->layer[2].segment_count;
1395 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1396 tvp->u.data = c->layer[2].interleaving;
1399 /* Multistream support */
1401 case DTV_DVBT2_PLP_ID_LEGACY:
1402 tvp->u.data = c->stream_id;
1406 case DTV_ATSCMH_FIC_VER:
1407 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1409 case DTV_ATSCMH_PARADE_ID:
1410 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1412 case DTV_ATSCMH_NOG:
1413 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1415 case DTV_ATSCMH_TNOG:
1416 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1418 case DTV_ATSCMH_SGN:
1419 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1421 case DTV_ATSCMH_PRC:
1422 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1424 case DTV_ATSCMH_RS_FRAME_MODE:
1425 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1427 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1428 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1430 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1431 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1433 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1434 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1436 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1437 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1439 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1440 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1442 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1443 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1445 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1446 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1448 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1449 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1453 tvp->u.data = c->lna;
1456 /* Fill quality measures */
1457 case DTV_STAT_SIGNAL_STRENGTH:
1458 tvp->u.st = c->strength;
1463 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1464 tvp->u.st = c->pre_bit_error;
1466 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1467 tvp->u.st = c->pre_bit_count;
1469 case DTV_STAT_POST_ERROR_BIT_COUNT:
1470 tvp->u.st = c->post_bit_error;
1472 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1473 tvp->u.st = c->post_bit_count;
1475 case DTV_STAT_ERROR_BLOCK_COUNT:
1476 tvp->u.st = c->block_error;
1478 case DTV_STAT_TOTAL_BLOCK_COUNT:
1479 tvp->u.st = c->block_count;
1482 dev_dbg(fe->dvb->device,
1483 "%s: FE property %d doesn't exist\n",
1484 __func__, tvp->cmd);
1488 /* Allow the frontend to override outgoing properties */
1489 if (fe->ops.get_property) {
1490 r = fe->ops.get_property(fe, tvp);
1495 dtv_property_dump(fe, tvp);
1500 static int dtv_set_frontend(struct dvb_frontend *fe);
1502 static bool is_dvbv3_delsys(u32 delsys)
1506 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1507 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1512 static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system)
1515 u32 delsys = SYS_UNDEFINED;
1516 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1517 enum dvbv3_emulation_type type;
1520 * It was reported that some old DVBv5 applications were
1521 * filling delivery_system with SYS_UNDEFINED. If this happens,
1522 * assume that the application wants to use the first supported
1525 if (c->delivery_system == SYS_UNDEFINED)
1526 c->delivery_system = fe->ops.delsys[0];
1528 if (desired_system == SYS_UNDEFINED) {
1530 * A DVBv3 call doesn't know what's the desired system.
1531 * Also, DVBv3 applications don't know that ops.info->type
1532 * could be changed, and they simply dies when it doesn't
1534 * So, don't change the current delivery system, as it
1535 * may be trying to do the wrong thing, like setting an
1536 * ISDB-T frontend as DVB-T. Instead, find the closest
1537 * DVBv3 system that matches the delivery system.
1539 if (is_dvbv3_delsys(c->delivery_system)) {
1540 dev_dbg(fe->dvb->device,
1541 "%s: Using delivery system to %d\n",
1542 __func__, c->delivery_system);
1545 type = dvbv3_type(c->delivery_system);
1548 desired_system = SYS_DVBS;
1551 desired_system = SYS_DVBC_ANNEX_A;
1554 desired_system = SYS_ATSC;
1557 desired_system = SYS_DVBT;
1560 dev_dbg(fe->dvb->device, "%s: This frontend doesn't support DVBv3 calls\n",
1565 * Get a delivery system that is compatible with DVBv3
1566 * NOTE: in order for this to work with softwares like Kaffeine that
1567 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1568 * DVB-S, drivers that support both should put the SYS_DVBS entry
1569 * before the SYS_DVBS2, otherwise it won't switch back to DVB-S.
1570 * The real fix is that userspace applications should not use DVBv3
1571 * and not trust on calling FE_SET_FRONTEND to switch the delivery
1575 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1576 if (fe->ops.delsys[ncaps] == desired_system) {
1577 delsys = desired_system;
1582 if (delsys == SYS_UNDEFINED) {
1583 dev_dbg(fe->dvb->device, "%s: Couldn't find a delivery system that matches %d\n",
1584 __func__, desired_system);
1588 * This is a DVBv5 call. So, it likely knows the supported
1592 /* Check if the desired delivery system is supported */
1594 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1595 if (fe->ops.delsys[ncaps] == desired_system) {
1596 c->delivery_system = desired_system;
1597 dev_dbg(fe->dvb->device,
1598 "%s: Changing delivery system to %d\n",
1599 __func__, desired_system);
1604 type = dvbv3_type(desired_system);
1607 * The delivery system is not supported. See if it can be
1609 * The emulation only works if the desired system is one of the
1610 * DVBv3 delivery systems
1612 if (!is_dvbv3_delsys(desired_system)) {
1613 dev_dbg(fe->dvb->device,
1614 "%s: can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n",
1620 * Get the last non-DVBv3 delivery system that has the same type
1621 * of the desired system
1624 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1625 if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) &&
1626 !is_dvbv3_delsys(fe->ops.delsys[ncaps]))
1627 delsys = fe->ops.delsys[ncaps];
1630 /* There's nothing compatible with the desired delivery system */
1631 if (delsys == SYS_UNDEFINED) {
1632 dev_dbg(fe->dvb->device,
1633 "%s: Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n",
1639 c->delivery_system = delsys;
1642 * The DVBv3 or DVBv5 call is requesting a different system. So,
1643 * emulation is needed.
1645 * Emulate newer delivery systems like ISDBT, DVBT and DTMB
1646 * for older DVBv5 applications. The emulation will try to use
1647 * the auto mode for most things, and will assume that the desired
1648 * delivery system is the last one at the ops.delsys[] array
1650 dev_dbg(fe->dvb->device,
1651 "%s: Using delivery system %d emulated as if it were a %d\n",
1652 __func__, delsys, desired_system);
1655 * For now, handles ISDB-T calls. More code may be needed here for the
1656 * other emulated stuff
1658 if (type == DVBV3_OFDM) {
1659 if (c->delivery_system == SYS_ISDBT) {
1660 dev_dbg(fe->dvb->device,
1661 "%s: Using defaults for SYS_ISDBT\n",
1664 if (!c->bandwidth_hz)
1665 c->bandwidth_hz = 6000000;
1667 c->isdbt_partial_reception = 0;
1668 c->isdbt_sb_mode = 0;
1669 c->isdbt_sb_subchannel = 0;
1670 c->isdbt_sb_segment_idx = 0;
1671 c->isdbt_sb_segment_count = 0;
1672 c->isdbt_layer_enabled = 0;
1673 for (i = 0; i < 3; i++) {
1674 c->layer[i].fec = FEC_AUTO;
1675 c->layer[i].modulation = QAM_AUTO;
1676 c->layer[i].interleaving = 0;
1677 c->layer[i].segment_count = 0;
1681 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1682 __func__, c->delivery_system);
1687 static int dtv_property_process_set(struct dvb_frontend *fe,
1688 struct dtv_property *tvp,
1692 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1694 /* Allow the frontend to validate incoming properties */
1695 if (fe->ops.set_property) {
1696 r = fe->ops.set_property(fe, tvp);
1704 * Reset a cache of data specific to the frontend here. This does
1705 * not effect hardware.
1707 dvb_frontend_clear_cache(fe);
1710 /* interpret the cache of data, build either a traditional frontend
1711 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1714 c->state = tvp->cmd;
1715 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1718 r = dtv_set_frontend(fe);
1721 c->frequency = tvp->u.data;
1723 case DTV_MODULATION:
1724 c->modulation = tvp->u.data;
1726 case DTV_BANDWIDTH_HZ:
1727 c->bandwidth_hz = tvp->u.data;
1730 c->inversion = tvp->u.data;
1732 case DTV_SYMBOL_RATE:
1733 c->symbol_rate = tvp->u.data;
1736 c->fec_inner = tvp->u.data;
1739 c->pilot = tvp->u.data;
1742 c->rolloff = tvp->u.data;
1744 case DTV_DELIVERY_SYSTEM:
1745 r = set_delivery_system(fe, tvp->u.data);
1748 c->voltage = tvp->u.data;
1749 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1750 (void *)c->voltage);
1753 c->sectone = tvp->u.data;
1754 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1755 (void *)c->sectone);
1757 case DTV_CODE_RATE_HP:
1758 c->code_rate_HP = tvp->u.data;
1760 case DTV_CODE_RATE_LP:
1761 c->code_rate_LP = tvp->u.data;
1763 case DTV_GUARD_INTERVAL:
1764 c->guard_interval = tvp->u.data;
1766 case DTV_TRANSMISSION_MODE:
1767 c->transmission_mode = tvp->u.data;
1770 c->hierarchy = tvp->u.data;
1772 case DTV_INTERLEAVING:
1773 c->interleaving = tvp->u.data;
1776 /* ISDB-T Support here */
1777 case DTV_ISDBT_PARTIAL_RECEPTION:
1778 c->isdbt_partial_reception = tvp->u.data;
1780 case DTV_ISDBT_SOUND_BROADCASTING:
1781 c->isdbt_sb_mode = tvp->u.data;
1783 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1784 c->isdbt_sb_subchannel = tvp->u.data;
1786 case DTV_ISDBT_SB_SEGMENT_IDX:
1787 c->isdbt_sb_segment_idx = tvp->u.data;
1789 case DTV_ISDBT_SB_SEGMENT_COUNT:
1790 c->isdbt_sb_segment_count = tvp->u.data;
1792 case DTV_ISDBT_LAYER_ENABLED:
1793 c->isdbt_layer_enabled = tvp->u.data;
1795 case DTV_ISDBT_LAYERA_FEC:
1796 c->layer[0].fec = tvp->u.data;
1798 case DTV_ISDBT_LAYERA_MODULATION:
1799 c->layer[0].modulation = tvp->u.data;
1801 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1802 c->layer[0].segment_count = tvp->u.data;
1804 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1805 c->layer[0].interleaving = tvp->u.data;
1807 case DTV_ISDBT_LAYERB_FEC:
1808 c->layer[1].fec = tvp->u.data;
1810 case DTV_ISDBT_LAYERB_MODULATION:
1811 c->layer[1].modulation = tvp->u.data;
1813 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1814 c->layer[1].segment_count = tvp->u.data;
1816 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1817 c->layer[1].interleaving = tvp->u.data;
1819 case DTV_ISDBT_LAYERC_FEC:
1820 c->layer[2].fec = tvp->u.data;
1822 case DTV_ISDBT_LAYERC_MODULATION:
1823 c->layer[2].modulation = tvp->u.data;
1825 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1826 c->layer[2].segment_count = tvp->u.data;
1828 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1829 c->layer[2].interleaving = tvp->u.data;
1832 /* Multistream support */
1834 case DTV_DVBT2_PLP_ID_LEGACY:
1835 c->stream_id = tvp->u.data;
1839 case DTV_ATSCMH_PARADE_ID:
1840 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1842 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1843 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1847 c->lna = tvp->u.data;
1848 if (fe->ops.set_lna)
1849 r = fe->ops.set_lna(fe);
1859 static int dvb_frontend_ioctl(struct file *file,
1860 unsigned int cmd, void *parg)
1862 struct dvb_device *dvbdev = file->private_data;
1863 struct dvb_frontend *fe = dvbdev->priv;
1864 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1865 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1868 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1869 if (down_interruptible(&fepriv->sem))
1870 return -ERESTARTSYS;
1872 if (fepriv->exit != DVB_FE_NO_EXIT) {
1877 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1878 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1879 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1884 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1885 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1887 c->state = DTV_UNDEFINED;
1888 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1895 static int dvb_frontend_ioctl_properties(struct file *file,
1896 unsigned int cmd, void *parg)
1898 struct dvb_device *dvbdev = file->private_data;
1899 struct dvb_frontend *fe = dvbdev->priv;
1900 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1901 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1904 struct dtv_properties *tvps = NULL;
1905 struct dtv_property *tvp = NULL;
1908 dev_dbg(fe->dvb->device, "%s:\n", __func__);
1910 if(cmd == FE_SET_PROPERTY) {
1911 tvps = (struct dtv_properties __user *)parg;
1913 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1914 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1916 /* Put an arbitrary limit on the number of messages that can
1917 * be sent at once */
1918 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1921 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1927 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1932 for (i = 0; i < tvps->num; i++) {
1933 err = dtv_property_process_set(fe, tvp + i, file);
1936 (tvp + i)->result = err;
1939 if (c->state == DTV_TUNE)
1940 dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1943 if(cmd == FE_GET_PROPERTY) {
1944 tvps = (struct dtv_properties __user *)parg;
1946 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1947 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1949 /* Put an arbitrary limit on the number of messages that can
1950 * be sent at once */
1951 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1954 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1960 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1966 * Fills the cache out struct with the cache contents, plus
1967 * the data retrieved from get_frontend, if the frontend
1968 * is not idle. Otherwise, returns the cached content
1970 if (fepriv->state != FESTATE_IDLE) {
1971 err = dtv_get_frontend(fe, NULL);
1975 for (i = 0; i < tvps->num; i++) {
1976 err = dtv_property_process_get(fe, c, tvp + i, file);
1979 (tvp + i)->result = err;
1982 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1995 static int dtv_set_frontend(struct dvb_frontend *fe)
1997 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1998 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1999 struct dvb_frontend_tune_settings fetunesettings;
2002 if (dvb_frontend_check_parameters(fe) < 0)
2006 * Initialize output parameters to match the values given by
2007 * the user. FE_SET_FRONTEND triggers an initial frontend event
2008 * with status = 0, which copies output parameters to userspace.
2010 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2013 * Be sure that the bandwidth will be filled for all
2014 * non-satellite systems, as tuners need to know what
2015 * low pass/Nyquist half filter should be applied, in
2016 * order to avoid inter-channel noise.
2018 * ISDB-T and DVB-T/T2 already sets bandwidth.
2019 * ATSC and DVB-C don't set, so, the core should fill it.
2021 * On DVB-C Annex A and C, the bandwidth is a function of
2022 * the roll-off and symbol rate. Annex B defines different
2023 * roll-off factors depending on the modulation. Fortunately,
2024 * Annex B is only used with 6MHz, so there's no need to
2027 * While not officially supported, a side effect of handling it at
2028 * the cache level is that a program could retrieve the bandwidth
2029 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2031 switch (c->delivery_system) {
2033 case SYS_DVBC_ANNEX_B:
2034 c->bandwidth_hz = 6000000;
2036 case SYS_DVBC_ANNEX_A:
2039 case SYS_DVBC_ANNEX_C:
2046 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
2048 /* force auto frequency inversion if requested */
2049 if (dvb_force_auto_inversion)
2050 c->inversion = INVERSION_AUTO;
2053 * without hierarchical coding code_rate_LP is irrelevant,
2054 * so we tolerate the otherwise invalid FEC_NONE setting
2056 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2057 c->code_rate_LP = FEC_AUTO;
2059 /* get frontend-specific tuning settings */
2060 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2061 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2062 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2063 fepriv->max_drift = fetunesettings.max_drift;
2064 fepriv->step_size = fetunesettings.step_size;
2066 /* default values */
2067 switch (c->delivery_system) {
2072 case SYS_DVBC_ANNEX_A:
2073 case SYS_DVBC_ANNEX_C:
2074 fepriv->min_delay = HZ / 20;
2075 fepriv->step_size = c->symbol_rate / 16000;
2076 fepriv->max_drift = c->symbol_rate / 2000;
2082 fepriv->min_delay = HZ / 20;
2083 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2084 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2088 * FIXME: This sounds wrong! if freqency_stepsize is
2089 * defined by the frontend, why not use it???
2091 fepriv->min_delay = HZ / 20;
2092 fepriv->step_size = 0; /* no zigzag */
2093 fepriv->max_drift = 0;
2097 if (dvb_override_tune_delay > 0)
2098 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2100 fepriv->state = FESTATE_RETUNE;
2102 /* Request the search algorithm to search */
2103 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2105 dvb_frontend_clear_events(fe);
2106 dvb_frontend_add_event(fe, 0);
2107 dvb_frontend_wakeup(fe);
2114 static int dvb_frontend_ioctl_legacy(struct file *file,
2115 unsigned int cmd, void *parg)
2117 struct dvb_device *dvbdev = file->private_data;
2118 struct dvb_frontend *fe = dvbdev->priv;
2119 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2120 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2125 struct dvb_frontend_info* info = parg;
2127 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2128 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2131 * Associate the 4 delivery systems supported by DVBv3
2132 * API with their DVBv5 counterpart. For the other standards,
2133 * use the closest type, assuming that it would hopefully
2134 * work with a DVBv3 application.
2135 * It should be noticed that, on multi-frontend devices with
2136 * different types (terrestrial and cable, for example),
2137 * a pure DVBv3 application won't be able to use all delivery
2138 * systems. Yet, changing the DVBv5 cache to the other delivery
2139 * system should be enough for making it work.
2141 switch (dvbv3_type(c->delivery_system)) {
2143 info->type = FE_QPSK;
2146 info->type = FE_ATSC;
2149 info->type = FE_QAM;
2152 info->type = FE_OFDM;
2155 dev_err(fe->dvb->device,
2156 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2157 __func__, c->delivery_system);
2158 fe->ops.info.type = FE_OFDM;
2160 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2161 __func__, c->delivery_system, fe->ops.info.type);
2163 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2164 * do it, it is done for it. */
2165 info->caps |= FE_CAN_INVERSION_AUTO;
2170 case FE_READ_STATUS: {
2171 fe_status_t* status = parg;
2173 /* if retune was requested but hasn't occurred yet, prevent
2174 * that user get signal state from previous tuning */
2175 if (fepriv->state == FESTATE_RETUNE ||
2176 fepriv->state == FESTATE_ERROR) {
2182 if (fe->ops.read_status)
2183 err = fe->ops.read_status(fe, status);
2188 if (fe->ops.read_ber) {
2190 err = fe->ops.read_ber(fe, (__u32 *) parg);
2196 case FE_READ_SIGNAL_STRENGTH:
2197 if (fe->ops.read_signal_strength) {
2199 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2206 if (fe->ops.read_snr) {
2208 err = fe->ops.read_snr(fe, (__u16 *) parg);
2214 case FE_READ_UNCORRECTED_BLOCKS:
2215 if (fe->ops.read_ucblocks) {
2217 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2223 case FE_DISEQC_RESET_OVERLOAD:
2224 if (fe->ops.diseqc_reset_overload) {
2225 err = fe->ops.diseqc_reset_overload(fe);
2226 fepriv->state = FESTATE_DISEQC;
2231 case FE_DISEQC_SEND_MASTER_CMD:
2232 if (fe->ops.diseqc_send_master_cmd) {
2233 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2234 fepriv->state = FESTATE_DISEQC;
2239 case FE_DISEQC_SEND_BURST:
2240 if (fe->ops.diseqc_send_burst) {
2241 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2242 fepriv->state = FESTATE_DISEQC;
2248 if (fe->ops.set_tone) {
2249 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2250 fepriv->tone = (fe_sec_tone_mode_t) parg;
2251 fepriv->state = FESTATE_DISEQC;
2256 case FE_SET_VOLTAGE:
2257 if (fe->ops.set_voltage) {
2258 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2259 fepriv->voltage = (fe_sec_voltage_t) parg;
2260 fepriv->state = FESTATE_DISEQC;
2265 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2266 if (fe->ops.dishnetwork_send_legacy_command) {
2267 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2268 fepriv->state = FESTATE_DISEQC;
2270 } else if (fe->ops.set_voltage) {
2272 * NOTE: This is a fallback condition. Some frontends
2273 * (stv0299 for instance) take longer than 8msec to
2274 * respond to a set_voltage command. Those switches
2275 * need custom routines to switch properly. For all
2276 * other frontends, the following should work ok.
2277 * Dish network legacy switches (as used by Dish500)
2278 * are controlled by sending 9-bit command words
2279 * spaced 8msec apart.
2280 * the actual command word is switch/port dependent
2281 * so it is up to the userspace application to send
2282 * the right command.
2283 * The command must always start with a '0' after
2284 * initialization, so parg is 8 bits and does not
2285 * include the initialization or start bit
2287 unsigned long swcmd = ((unsigned long) parg) << 1;
2288 struct timeval nexttime;
2289 struct timeval tv[10];
2292 if (dvb_frontend_debug)
2293 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2294 do_gettimeofday(&nexttime);
2295 if (dvb_frontend_debug)
2297 /* before sending a command, initialize by sending
2298 * a 32ms 18V to the switch
2300 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2301 dvb_frontend_sleep_until(&nexttime, 32000);
2303 for (i = 0; i < 9; i++) {
2304 if (dvb_frontend_debug)
2305 do_gettimeofday(&tv[i + 1]);
2306 if ((swcmd & 0x01) != last) {
2307 /* set voltage to (last ? 13V : 18V) */
2308 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2309 last = (last) ? 0 : 1;
2313 dvb_frontend_sleep_until(&nexttime, 8000);
2315 if (dvb_frontend_debug) {
2316 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2317 __func__, fe->dvb->num);
2318 for (i = 1; i < 10; i++)
2319 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2322 fepriv->state = FESTATE_DISEQC;
2327 case FE_DISEQC_RECV_SLAVE_REPLY:
2328 if (fe->ops.diseqc_recv_slave_reply)
2329 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2332 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2333 if (fe->ops.enable_high_lnb_voltage)
2334 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2337 case FE_SET_FRONTEND:
2338 err = set_delivery_system(fe, SYS_UNDEFINED);
2342 err = dtv_property_cache_sync(fe, c, parg);
2345 err = dtv_set_frontend(fe);
2348 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2351 case FE_GET_FRONTEND:
2352 err = dtv_get_frontend(fe, parg);
2355 case FE_SET_FRONTEND_TUNE_MODE:
2356 fepriv->tune_mode_flags = (unsigned long) parg;
2365 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2367 struct dvb_device *dvbdev = file->private_data;
2368 struct dvb_frontend *fe = dvbdev->priv;
2369 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2371 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2373 poll_wait (file, &fepriv->events.wait_queue, wait);
2375 if (fepriv->events.eventw != fepriv->events.eventr)
2376 return (POLLIN | POLLRDNORM | POLLPRI);
2381 static int dvb_frontend_open(struct inode *inode, struct file *file)
2383 struct dvb_device *dvbdev = file->private_data;
2384 struct dvb_frontend *fe = dvbdev->priv;
2385 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2386 struct dvb_adapter *adapter = fe->dvb;
2389 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2390 if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2393 if (adapter->mfe_shared) {
2394 mutex_lock (&adapter->mfe_lock);
2396 if (adapter->mfe_dvbdev == NULL)
2397 adapter->mfe_dvbdev = dvbdev;
2399 else if (adapter->mfe_dvbdev != dvbdev) {
2401 *mfedev = adapter->mfe_dvbdev;
2403 *mfe = mfedev->priv;
2404 struct dvb_frontend_private
2405 *mfepriv = mfe->frontend_priv;
2406 int mferetry = (dvb_mfe_wait_time << 1);
2408 mutex_unlock (&adapter->mfe_lock);
2409 while (mferetry-- && (mfedev->users != -1 ||
2410 mfepriv->thread != NULL)) {
2411 if(msleep_interruptible(500)) {
2412 if(signal_pending(current))
2417 mutex_lock (&adapter->mfe_lock);
2418 if(adapter->mfe_dvbdev != dvbdev) {
2419 mfedev = adapter->mfe_dvbdev;
2421 mfepriv = mfe->frontend_priv;
2422 if (mfedev->users != -1 ||
2423 mfepriv->thread != NULL) {
2424 mutex_unlock (&adapter->mfe_lock);
2427 adapter->mfe_dvbdev = dvbdev;
2432 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2433 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2436 /* If we took control of the bus, we need to force
2437 reinitialization. This is because many ts_bus_ctrl()
2438 functions strobe the RESET pin on the demod, and if the
2439 frontend thread already exists then the dvb_init() routine
2440 won't get called (which is what usually does initial
2441 register configuration). */
2442 fepriv->reinitialise = 1;
2445 if ((ret = dvb_generic_open (inode, file)) < 0)
2448 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2449 /* normal tune mode when opened R/W */
2450 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2452 fepriv->voltage = -1;
2454 ret = dvb_frontend_start (fe);
2458 /* empty event queue */
2459 fepriv->events.eventr = fepriv->events.eventw = 0;
2462 if (adapter->mfe_shared)
2463 mutex_unlock (&adapter->mfe_lock);
2467 dvb_generic_release(inode, file);
2469 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2470 fe->ops.ts_bus_ctrl(fe, 0);
2472 if (adapter->mfe_shared)
2473 mutex_unlock (&adapter->mfe_lock);
2477 static int dvb_frontend_release(struct inode *inode, struct file *file)
2479 struct dvb_device *dvbdev = file->private_data;
2480 struct dvb_frontend *fe = dvbdev->priv;
2481 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2484 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2486 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2487 fepriv->release_jiffies = jiffies;
2491 ret = dvb_generic_release (inode, file);
2493 if (dvbdev->users == -1) {
2494 wake_up(&fepriv->wait_queue);
2495 if (fepriv->exit != DVB_FE_NO_EXIT) {
2496 fops_put(file->f_op);
2498 wake_up(&dvbdev->wait_queue);
2500 if (fe->ops.ts_bus_ctrl)
2501 fe->ops.ts_bus_ctrl(fe, 0);
2507 static const struct file_operations dvb_frontend_fops = {
2508 .owner = THIS_MODULE,
2509 .unlocked_ioctl = dvb_generic_ioctl,
2510 .poll = dvb_frontend_poll,
2511 .open = dvb_frontend_open,
2512 .release = dvb_frontend_release,
2513 .llseek = noop_llseek,
2516 int dvb_frontend_suspend(struct dvb_frontend *fe)
2520 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2523 if (fe->ops.tuner_ops.sleep)
2524 ret = fe->ops.tuner_ops.sleep(fe);
2527 ret = fe->ops.sleep(fe);
2531 EXPORT_SYMBOL(dvb_frontend_suspend);
2533 int dvb_frontend_resume(struct dvb_frontend *fe)
2535 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2538 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2542 ret = fe->ops.init(fe);
2544 if (fe->ops.tuner_ops.init)
2545 ret = fe->ops.tuner_ops.init(fe);
2547 fepriv->state = FESTATE_RETUNE;
2548 dvb_frontend_wakeup(fe);
2552 EXPORT_SYMBOL(dvb_frontend_resume);
2554 int dvb_register_frontend(struct dvb_adapter* dvb,
2555 struct dvb_frontend* fe)
2557 struct dvb_frontend_private *fepriv;
2558 static const struct dvb_device dvbdev_template = {
2562 .fops = &dvb_frontend_fops,
2563 .kernel_ioctl = dvb_frontend_ioctl
2566 dev_dbg(dvb->device, "%s:\n", __func__);
2568 if (mutex_lock_interruptible(&frontend_mutex))
2569 return -ERESTARTSYS;
2571 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2572 if (fe->frontend_priv == NULL) {
2573 mutex_unlock(&frontend_mutex);
2576 fepriv = fe->frontend_priv;
2578 sema_init(&fepriv->sem, 1);
2579 init_waitqueue_head (&fepriv->wait_queue);
2580 init_waitqueue_head (&fepriv->events.wait_queue);
2581 mutex_init(&fepriv->events.mtx);
2583 fepriv->inversion = INVERSION_OFF;
2585 dev_info(fe->dvb->device,
2586 "DVB: registering adapter %i frontend %i (%s)...\n",
2587 fe->dvb->num, fe->id, fe->ops.info.name);
2589 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2590 fe, DVB_DEVICE_FRONTEND);
2593 * Initialize the cache to the proper values according with the
2594 * first supported delivery system (ops->delsys[0])
2597 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2598 dvb_frontend_clear_cache(fe);
2600 mutex_unlock(&frontend_mutex);
2603 EXPORT_SYMBOL(dvb_register_frontend);
2605 int dvb_unregister_frontend(struct dvb_frontend* fe)
2607 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2608 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2610 mutex_lock(&frontend_mutex);
2611 dvb_frontend_stop (fe);
2612 mutex_unlock(&frontend_mutex);
2614 if (fepriv->dvbdev->users < -1)
2615 wait_event(fepriv->dvbdev->wait_queue,
2616 fepriv->dvbdev->users==-1);
2618 mutex_lock(&frontend_mutex);
2619 dvb_unregister_device (fepriv->dvbdev);
2621 /* fe is invalid now */
2623 mutex_unlock(&frontend_mutex);
2626 EXPORT_SYMBOL(dvb_unregister_frontend);
2628 #ifdef CONFIG_MEDIA_ATTACH
2629 void dvb_frontend_detach(struct dvb_frontend* fe)
2633 if (fe->ops.release_sec) {
2634 fe->ops.release_sec(fe);
2635 symbol_put_addr(fe->ops.release_sec);
2637 if (fe->ops.tuner_ops.release) {
2638 fe->ops.tuner_ops.release(fe);
2639 symbol_put_addr(fe->ops.tuner_ops.release);
2641 if (fe->ops.analog_ops.release) {
2642 fe->ops.analog_ops.release(fe);
2643 symbol_put_addr(fe->ops.analog_ops.release);
2645 ptr = (void*)fe->ops.release;
2647 fe->ops.release(fe);
2648 symbol_put_addr(ptr);
2652 void dvb_frontend_detach(struct dvb_frontend* fe)
2654 if (fe->ops.release_sec)
2655 fe->ops.release_sec(fe);
2656 if (fe->ops.tuner_ops.release)
2657 fe->ops.tuner_ops.release(fe);
2658 if (fe->ops.analog_ops.release)
2659 fe->ops.analog_ops.release(fe);
2660 if (fe->ops.release)
2661 fe->ops.release(fe);
2664 EXPORT_SYMBOL(dvb_frontend_detach);