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authorMauro Carvalho Chehab <mchehab@redhat.com>2012-06-14 15:35:53 -0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2012-08-13 22:08:14 -0400
commit3d6c2bc08ac4f75bf3597740357c98f2207ca412 (patch)
treedfe6d7c9e466cef06224ffadd3310d61f41a4678 /drivers/media/dvb-core/dvb_frontend.c
parent5bc3cb743bbab408792c1b4ef31adf6268aa4b7e (diff)
[media] dvb: move the dvb core one level up
just like the V4L2 core, move the DVB core to drivers/media, as the intention is to get rid of both "video" and "dvb" directories. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb-core/dvb_frontend.c')
-rw-r--r--drivers/media/dvb-core/dvb_frontend.c2553
1 files changed, 2553 insertions, 0 deletions
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c
new file mode 100644
index 000000000000..12e5eb1fff76
--- /dev/null
+++ b/drivers/media/dvb-core/dvb_frontend.c
@@ -0,0 +1,2553 @@
1/*
2 * dvb_frontend.c: DVB frontend tuning interface/thread
3 *
4 *
5 * Copyright (C) 1999-2001 Ralph Metzler
6 * Marcus Metzler
7 * Holger Waechtler
8 * for convergence integrated media GmbH
9 *
10 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
11 *
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.
16 *
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.
21 *
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
26 */
27
28/* Enables DVBv3 compatibility bits at the headers */
29#define __DVB_CORE__
30
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>
44
45#include "dvb_frontend.h"
46#include "dvbdev.h"
47#include <linux/dvb/version.h>
48
49static int dvb_frontend_debug;
50static int dvb_shutdown_timeout;
51static int dvb_force_auto_inversion;
52static int dvb_override_tune_delay;
53static int dvb_powerdown_on_sleep = 1;
54static int dvb_mfe_wait_time = 5;
55
56module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
57MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
58module_param(dvb_shutdown_timeout, int, 0644);
59MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
60module_param(dvb_force_auto_inversion, int, 0644);
61MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
62module_param(dvb_override_tune_delay, int, 0644);
63MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
64module_param(dvb_powerdown_on_sleep, int, 0644);
65MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
66module_param(dvb_mfe_wait_time, int, 0644);
67MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
68
69#define dprintk if (dvb_frontend_debug) printk
70
71#define FESTATE_IDLE 1
72#define FESTATE_RETUNE 2
73#define FESTATE_TUNING_FAST 4
74#define FESTATE_TUNING_SLOW 8
75#define FESTATE_TUNED 16
76#define FESTATE_ZIGZAG_FAST 32
77#define FESTATE_ZIGZAG_SLOW 64
78#define FESTATE_DISEQC 128
79#define FESTATE_ERROR 256
80#define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
81#define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
82#define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
83#define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
84
85#define FE_ALGO_HW 1
86/*
87 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
88 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
89 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
90 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
91 * FESTATE_TUNED. The frontend has successfully locked on.
92 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
93 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
94 * FESTATE_DISEQC. A DISEQC command has just been issued.
95 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
96 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
97 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
98 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
99 */
100
101#define DVB_FE_NO_EXIT 0
102#define DVB_FE_NORMAL_EXIT 1
103#define DVB_FE_DEVICE_REMOVED 2
104
105static DEFINE_MUTEX(frontend_mutex);
106
107struct dvb_frontend_private {
108
109 /* thread/frontend values */
110 struct dvb_device *dvbdev;
111 struct dvb_frontend_parameters parameters_out;
112 struct dvb_fe_events events;
113 struct semaphore sem;
114 struct list_head list_head;
115 wait_queue_head_t wait_queue;
116 struct task_struct *thread;
117 unsigned long release_jiffies;
118 unsigned int exit;
119 unsigned int wakeup;
120 fe_status_t status;
121 unsigned long tune_mode_flags;
122 unsigned int delay;
123 unsigned int reinitialise;
124 int tone;
125 int voltage;
126
127 /* swzigzag values */
128 unsigned int state;
129 unsigned int bending;
130 int lnb_drift;
131 unsigned int inversion;
132 unsigned int auto_step;
133 unsigned int auto_sub_step;
134 unsigned int started_auto_step;
135 unsigned int min_delay;
136 unsigned int max_drift;
137 unsigned int step_size;
138 int quality;
139 unsigned int check_wrapped;
140 enum dvbfe_search algo_status;
141};
142
143static void dvb_frontend_wakeup(struct dvb_frontend *fe);
144static int dtv_get_frontend(struct dvb_frontend *fe,
145 struct dvb_frontend_parameters *p_out);
146static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
147 struct dvb_frontend_parameters *p);
148
149static bool has_get_frontend(struct dvb_frontend *fe)
150{
151 return fe->ops.get_frontend != NULL;
152}
153
154/*
155 * Due to DVBv3 API calls, a delivery system should be mapped into one of
156 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
157 * otherwise, a DVBv3 call will fail.
158 */
159enum dvbv3_emulation_type {
160 DVBV3_UNKNOWN,
161 DVBV3_QPSK,
162 DVBV3_QAM,
163 DVBV3_OFDM,
164 DVBV3_ATSC,
165};
166
167static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
168{
169 switch (delivery_system) {
170 case SYS_DVBC_ANNEX_A:
171 case SYS_DVBC_ANNEX_C:
172 return DVBV3_QAM;
173 case SYS_DVBS:
174 case SYS_DVBS2:
175 case SYS_TURBO:
176 case SYS_ISDBS:
177 case SYS_DSS:
178 return DVBV3_QPSK;
179 case SYS_DVBT:
180 case SYS_DVBT2:
181 case SYS_ISDBT:
182 case SYS_DTMB:
183 return DVBV3_OFDM;
184 case SYS_ATSC:
185 case SYS_ATSCMH:
186 case SYS_DVBC_ANNEX_B:
187 return DVBV3_ATSC;
188 case SYS_UNDEFINED:
189 case SYS_ISDBC:
190 case SYS_DVBH:
191 case SYS_DAB:
192 default:
193 /*
194 * Doesn't know how to emulate those types and/or
195 * there's no frontend driver from this type yet
196 * with some emulation code, so, we're not sure yet how
197 * to handle them, or they're not compatible with a DVBv3 call.
198 */
199 return DVBV3_UNKNOWN;
200 }
201}
202
203static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
204{
205 struct dvb_frontend_private *fepriv = fe->frontend_priv;
206 struct dvb_fe_events *events = &fepriv->events;
207 struct dvb_frontend_event *e;
208 int wp;
209
210 dprintk ("%s\n", __func__);
211
212 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
213 dtv_get_frontend(fe, &fepriv->parameters_out);
214
215 mutex_lock(&events->mtx);
216
217 wp = (events->eventw + 1) % MAX_EVENT;
218 if (wp == events->eventr) {
219 events->overflow = 1;
220 events->eventr = (events->eventr + 1) % MAX_EVENT;
221 }
222
223 e = &events->events[events->eventw];
224 e->status = status;
225 e->parameters = fepriv->parameters_out;
226
227 events->eventw = wp;
228
229 mutex_unlock(&events->mtx);
230
231 wake_up_interruptible (&events->wait_queue);
232}
233
234static int dvb_frontend_get_event(struct dvb_frontend *fe,
235 struct dvb_frontend_event *event, int flags)
236{
237 struct dvb_frontend_private *fepriv = fe->frontend_priv;
238 struct dvb_fe_events *events = &fepriv->events;
239
240 dprintk ("%s\n", __func__);
241
242 if (events->overflow) {
243 events->overflow = 0;
244 return -EOVERFLOW;
245 }
246
247 if (events->eventw == events->eventr) {
248 int ret;
249
250 if (flags & O_NONBLOCK)
251 return -EWOULDBLOCK;
252
253 up(&fepriv->sem);
254
255 ret = wait_event_interruptible (events->wait_queue,
256 events->eventw != events->eventr);
257
258 if (down_interruptible (&fepriv->sem))
259 return -ERESTARTSYS;
260
261 if (ret < 0)
262 return ret;
263 }
264
265 mutex_lock(&events->mtx);
266 *event = events->events[events->eventr];
267 events->eventr = (events->eventr + 1) % MAX_EVENT;
268 mutex_unlock(&events->mtx);
269
270 return 0;
271}
272
273static void dvb_frontend_clear_events(struct dvb_frontend *fe)
274{
275 struct dvb_frontend_private *fepriv = fe->frontend_priv;
276 struct dvb_fe_events *events = &fepriv->events;
277
278 mutex_lock(&events->mtx);
279 events->eventr = events->eventw;
280 mutex_unlock(&events->mtx);
281}
282
283static void dvb_frontend_init(struct dvb_frontend *fe)
284{
285 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
286 fe->dvb->num,
287 fe->id,
288 fe->ops.info.name);
289
290 if (fe->ops.init)
291 fe->ops.init(fe);
292 if (fe->ops.tuner_ops.init) {
293 if (fe->ops.i2c_gate_ctrl)
294 fe->ops.i2c_gate_ctrl(fe, 1);
295 fe->ops.tuner_ops.init(fe);
296 if (fe->ops.i2c_gate_ctrl)
297 fe->ops.i2c_gate_ctrl(fe, 0);
298 }
299}
300
301void dvb_frontend_reinitialise(struct dvb_frontend *fe)
302{
303 struct dvb_frontend_private *fepriv = fe->frontend_priv;
304
305 fepriv->reinitialise = 1;
306 dvb_frontend_wakeup(fe);
307}
308EXPORT_SYMBOL(dvb_frontend_reinitialise);
309
310static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
311{
312 int q2;
313
314 dprintk ("%s\n", __func__);
315
316 if (locked)
317 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
318 else
319 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
320
321 q2 = fepriv->quality - 128;
322 q2 *= q2;
323
324 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
325}
326
327/**
328 * Performs automatic twiddling of frontend parameters.
329 *
330 * @param fe The frontend concerned.
331 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
332 * @returns Number of complete iterations that have been performed.
333 */
334static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
335{
336 int autoinversion;
337 int ready = 0;
338 int fe_set_err = 0;
339 struct dvb_frontend_private *fepriv = fe->frontend_priv;
340 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
341 int original_inversion = c->inversion;
342 u32 original_frequency = c->frequency;
343
344 /* are we using autoinversion? */
345 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
346 (c->inversion == INVERSION_AUTO));
347
348 /* setup parameters correctly */
349 while(!ready) {
350 /* calculate the lnb_drift */
351 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
352
353 /* wrap the auto_step if we've exceeded the maximum drift */
354 if (fepriv->lnb_drift > fepriv->max_drift) {
355 fepriv->auto_step = 0;
356 fepriv->auto_sub_step = 0;
357 fepriv->lnb_drift = 0;
358 }
359
360 /* perform inversion and +/- zigzag */
361 switch(fepriv->auto_sub_step) {
362 case 0:
363 /* try with the current inversion and current drift setting */
364 ready = 1;
365 break;
366
367 case 1:
368 if (!autoinversion) break;
369
370 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
371 ready = 1;
372 break;
373
374 case 2:
375 if (fepriv->lnb_drift == 0) break;
376
377 fepriv->lnb_drift = -fepriv->lnb_drift;
378 ready = 1;
379 break;
380
381 case 3:
382 if (fepriv->lnb_drift == 0) break;
383 if (!autoinversion) break;
384
385 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
386 fepriv->lnb_drift = -fepriv->lnb_drift;
387 ready = 1;
388 break;
389
390 default:
391 fepriv->auto_step++;
392 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
393 break;
394 }
395
396 if (!ready) fepriv->auto_sub_step++;
397 }
398
399 /* if this attempt would hit where we started, indicate a complete
400 * iteration has occurred */
401 if ((fepriv->auto_step == fepriv->started_auto_step) &&
402 (fepriv->auto_sub_step == 0) && check_wrapped) {
403 return 1;
404 }
405
406 dprintk("%s: drift:%i inversion:%i auto_step:%i "
407 "auto_sub_step:%i started_auto_step:%i\n",
408 __func__, fepriv->lnb_drift, fepriv->inversion,
409 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
410
411 /* set the frontend itself */
412 c->frequency += fepriv->lnb_drift;
413 if (autoinversion)
414 c->inversion = fepriv->inversion;
415 tmp = *c;
416 if (fe->ops.set_frontend)
417 fe_set_err = fe->ops.set_frontend(fe);
418 *c = tmp;
419 if (fe_set_err < 0) {
420 fepriv->state = FESTATE_ERROR;
421 return fe_set_err;
422 }
423
424 c->frequency = original_frequency;
425 c->inversion = original_inversion;
426
427 fepriv->auto_sub_step++;
428 return 0;
429}
430
431static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
432{
433 fe_status_t s = 0;
434 int retval = 0;
435 struct dvb_frontend_private *fepriv = fe->frontend_priv;
436 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
437
438 /* if we've got no parameters, just keep idling */
439 if (fepriv->state & FESTATE_IDLE) {
440 fepriv->delay = 3*HZ;
441 fepriv->quality = 0;
442 return;
443 }
444
445 /* in SCAN mode, we just set the frontend when asked and leave it alone */
446 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
447 if (fepriv->state & FESTATE_RETUNE) {
448 tmp = *c;
449 if (fe->ops.set_frontend)
450 retval = fe->ops.set_frontend(fe);
451 *c = tmp;
452 if (retval < 0)
453 fepriv->state = FESTATE_ERROR;
454 else
455 fepriv->state = FESTATE_TUNED;
456 }
457 fepriv->delay = 3*HZ;
458 fepriv->quality = 0;
459 return;
460 }
461
462 /* get the frontend status */
463 if (fepriv->state & FESTATE_RETUNE) {
464 s = 0;
465 } else {
466 if (fe->ops.read_status)
467 fe->ops.read_status(fe, &s);
468 if (s != fepriv->status) {
469 dvb_frontend_add_event(fe, s);
470 fepriv->status = s;
471 }
472 }
473
474 /* if we're not tuned, and we have a lock, move to the TUNED state */
475 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
476 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
477 fepriv->state = FESTATE_TUNED;
478
479 /* if we're tuned, then we have determined the correct inversion */
480 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
481 (c->inversion == INVERSION_AUTO)) {
482 c->inversion = fepriv->inversion;
483 }
484 return;
485 }
486
487 /* if we are tuned already, check we're still locked */
488 if (fepriv->state & FESTATE_TUNED) {
489 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
490
491 /* we're tuned, and the lock is still good... */
492 if (s & FE_HAS_LOCK) {
493 return;
494 } else { /* if we _WERE_ tuned, but now don't have a lock */
495 fepriv->state = FESTATE_ZIGZAG_FAST;
496 fepriv->started_auto_step = fepriv->auto_step;
497 fepriv->check_wrapped = 0;
498 }
499 }
500
501 /* don't actually do anything if we're in the LOSTLOCK state,
502 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
503 if ((fepriv->state & FESTATE_LOSTLOCK) &&
504 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
505 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
506 return;
507 }
508
509 /* don't do anything if we're in the DISEQC state, since this
510 * might be someone with a motorized dish controlled by DISEQC.
511 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
512 if (fepriv->state & FESTATE_DISEQC) {
513 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
514 return;
515 }
516
517 /* if we're in the RETUNE state, set everything up for a brand
518 * new scan, keeping the current inversion setting, as the next
519 * tune is _very_ likely to require the same */
520 if (fepriv->state & FESTATE_RETUNE) {
521 fepriv->lnb_drift = 0;
522 fepriv->auto_step = 0;
523 fepriv->auto_sub_step = 0;
524 fepriv->started_auto_step = 0;
525 fepriv->check_wrapped = 0;
526 }
527
528 /* fast zigzag. */
529 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
530 fepriv->delay = fepriv->min_delay;
531
532 /* perform a tune */
533 retval = dvb_frontend_swzigzag_autotune(fe,
534 fepriv->check_wrapped);
535 if (retval < 0) {
536 return;
537 } else if (retval) {
538 /* OK, if we've run out of trials at the fast speed.
539 * Drop back to slow for the _next_ attempt */
540 fepriv->state = FESTATE_SEARCHING_SLOW;
541 fepriv->started_auto_step = fepriv->auto_step;
542 return;
543 }
544 fepriv->check_wrapped = 1;
545
546 /* if we've just retuned, enter the ZIGZAG_FAST state.
547 * This ensures we cannot return from an
548 * FE_SET_FRONTEND ioctl before the first frontend tune
549 * occurs */
550 if (fepriv->state & FESTATE_RETUNE) {
551 fepriv->state = FESTATE_TUNING_FAST;
552 }
553 }
554
555 /* slow zigzag */
556 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
557 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
558
559 /* Note: don't bother checking for wrapping; we stay in this
560 * state until we get a lock */
561 dvb_frontend_swzigzag_autotune(fe, 0);
562 }
563}
564
565static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
566{
567 struct dvb_frontend_private *fepriv = fe->frontend_priv;
568
569 if (fepriv->exit != DVB_FE_NO_EXIT)
570 return 1;
571
572 if (fepriv->dvbdev->writers == 1)
573 if (time_after_eq(jiffies, fepriv->release_jiffies +
574 dvb_shutdown_timeout * HZ))
575 return 1;
576
577 return 0;
578}
579
580static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
581{
582 struct dvb_frontend_private *fepriv = fe->frontend_priv;
583
584 if (fepriv->wakeup) {
585 fepriv->wakeup = 0;
586 return 1;
587 }
588 return dvb_frontend_is_exiting(fe);
589}
590
591static void dvb_frontend_wakeup(struct dvb_frontend *fe)
592{
593 struct dvb_frontend_private *fepriv = fe->frontend_priv;
594
595 fepriv->wakeup = 1;
596 wake_up_interruptible(&fepriv->wait_queue);
597}
598
599static int dvb_frontend_thread(void *data)
600{
601 struct dvb_frontend *fe = data;
602 struct dvb_frontend_private *fepriv = fe->frontend_priv;
603 fe_status_t s;
604 enum dvbfe_algo algo;
605
606 bool re_tune = false;
607
608 dprintk("%s\n", __func__);
609
610 fepriv->check_wrapped = 0;
611 fepriv->quality = 0;
612 fepriv->delay = 3*HZ;
613 fepriv->status = 0;
614 fepriv->wakeup = 0;
615 fepriv->reinitialise = 0;
616
617 dvb_frontend_init(fe);
618
619 set_freezable();
620 while (1) {
621 up(&fepriv->sem); /* is locked when we enter the thread... */
622restart:
623 wait_event_interruptible_timeout(fepriv->wait_queue,
624 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
625 || freezing(current),
626 fepriv->delay);
627
628 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
629 /* got signal or quitting */
630 fepriv->exit = DVB_FE_NORMAL_EXIT;
631 break;
632 }
633
634 if (try_to_freeze())
635 goto restart;
636
637 if (down_interruptible(&fepriv->sem))
638 break;
639
640 if (fepriv->reinitialise) {
641 dvb_frontend_init(fe);
642 if (fe->ops.set_tone && fepriv->tone != -1)
643 fe->ops.set_tone(fe, fepriv->tone);
644 if (fe->ops.set_voltage && fepriv->voltage != -1)
645 fe->ops.set_voltage(fe, fepriv->voltage);
646 fepriv->reinitialise = 0;
647 }
648
649 /* do an iteration of the tuning loop */
650 if (fe->ops.get_frontend_algo) {
651 algo = fe->ops.get_frontend_algo(fe);
652 switch (algo) {
653 case DVBFE_ALGO_HW:
654 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
655
656 if (fepriv->state & FESTATE_RETUNE) {
657 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
658 re_tune = true;
659 fepriv->state = FESTATE_TUNED;
660 } else {
661 re_tune = false;
662 }
663
664 if (fe->ops.tune)
665 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
666
667 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
668 dprintk("%s: state changed, adding current state\n", __func__);
669 dvb_frontend_add_event(fe, s);
670 fepriv->status = s;
671 }
672 break;
673 case DVBFE_ALGO_SW:
674 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
675 dvb_frontend_swzigzag(fe);
676 break;
677 case DVBFE_ALGO_CUSTOM:
678 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
679 if (fepriv->state & FESTATE_RETUNE) {
680 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
681 fepriv->state = FESTATE_TUNED;
682 }
683 /* Case where we are going to search for a carrier
684 * User asked us to retune again for some reason, possibly
685 * requesting a search with a new set of parameters
686 */
687 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
688 if (fe->ops.search) {
689 fepriv->algo_status = fe->ops.search(fe);
690 /* We did do a search as was requested, the flags are
691 * now unset as well and has the flags wrt to search.
692 */
693 } else {
694 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
695 }
696 }
697 /* Track the carrier if the search was successful */
698 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
699 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
700 fepriv->delay = HZ / 2;
701 }
702 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
703 fe->ops.read_status(fe, &s);
704 if (s != fepriv->status) {
705 dvb_frontend_add_event(fe, s); /* update event list */
706 fepriv->status = s;
707 if (!(s & FE_HAS_LOCK)) {
708 fepriv->delay = HZ / 10;
709 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
710 } else {
711 fepriv->delay = 60 * HZ;
712 }
713 }
714 break;
715 default:
716 dprintk("%s: UNDEFINED ALGO !\n", __func__);
717 break;
718 }
719 } else {
720 dvb_frontend_swzigzag(fe);
721 }
722 }
723
724 if (dvb_powerdown_on_sleep) {
725 if (fe->ops.set_voltage)
726 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
727 if (fe->ops.tuner_ops.sleep) {
728 if (fe->ops.i2c_gate_ctrl)
729 fe->ops.i2c_gate_ctrl(fe, 1);
730 fe->ops.tuner_ops.sleep(fe);
731 if (fe->ops.i2c_gate_ctrl)
732 fe->ops.i2c_gate_ctrl(fe, 0);
733 }
734 if (fe->ops.sleep)
735 fe->ops.sleep(fe);
736 }
737
738 fepriv->thread = NULL;
739 if (kthread_should_stop())
740 fepriv->exit = DVB_FE_DEVICE_REMOVED;
741 else
742 fepriv->exit = DVB_FE_NO_EXIT;
743 mb();
744
745 dvb_frontend_wakeup(fe);
746 return 0;
747}
748
749static void dvb_frontend_stop(struct dvb_frontend *fe)
750{
751 struct dvb_frontend_private *fepriv = fe->frontend_priv;
752
753 dprintk ("%s\n", __func__);
754
755 fepriv->exit = DVB_FE_NORMAL_EXIT;
756 mb();
757
758 if (!fepriv->thread)
759 return;
760
761 kthread_stop(fepriv->thread);
762
763 sema_init(&fepriv->sem, 1);
764 fepriv->state = FESTATE_IDLE;
765
766 /* paranoia check in case a signal arrived */
767 if (fepriv->thread)
768 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
769 fepriv->thread);
770}
771
772s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
773{
774 return ((curtime.tv_usec < lasttime.tv_usec) ?
775 1000000 - lasttime.tv_usec + curtime.tv_usec :
776 curtime.tv_usec - lasttime.tv_usec);
777}
778EXPORT_SYMBOL(timeval_usec_diff);
779
780static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
781{
782 curtime->tv_usec += add_usec;
783 if (curtime->tv_usec >= 1000000) {
784 curtime->tv_usec -= 1000000;
785 curtime->tv_sec++;
786 }
787}
788
789/*
790 * Sleep until gettimeofday() > waketime + add_usec
791 * This needs to be as precise as possible, but as the delay is
792 * usually between 2ms and 32ms, it is done using a scheduled msleep
793 * followed by usleep (normally a busy-wait loop) for the remainder
794 */
795void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
796{
797 struct timeval lasttime;
798 s32 delta, newdelta;
799
800 timeval_usec_add(waketime, add_usec);
801
802 do_gettimeofday(&lasttime);
803 delta = timeval_usec_diff(lasttime, *waketime);
804 if (delta > 2500) {
805 msleep((delta - 1500) / 1000);
806 do_gettimeofday(&lasttime);
807 newdelta = timeval_usec_diff(lasttime, *waketime);
808 delta = (newdelta > delta) ? 0 : newdelta;
809 }
810 if (delta > 0)
811 udelay(delta);
812}
813EXPORT_SYMBOL(dvb_frontend_sleep_until);
814
815static int dvb_frontend_start(struct dvb_frontend *fe)
816{
817 int ret;
818 struct dvb_frontend_private *fepriv = fe->frontend_priv;
819 struct task_struct *fe_thread;
820
821 dprintk ("%s\n", __func__);
822
823 if (fepriv->thread) {
824 if (fepriv->exit == DVB_FE_NO_EXIT)
825 return 0;
826 else
827 dvb_frontend_stop (fe);
828 }
829
830 if (signal_pending(current))
831 return -EINTR;
832 if (down_interruptible (&fepriv->sem))
833 return -EINTR;
834
835 fepriv->state = FESTATE_IDLE;
836 fepriv->exit = DVB_FE_NO_EXIT;
837 fepriv->thread = NULL;
838 mb();
839
840 fe_thread = kthread_run(dvb_frontend_thread, fe,
841 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
842 if (IS_ERR(fe_thread)) {
843 ret = PTR_ERR(fe_thread);
844 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
845 up(&fepriv->sem);
846 return ret;
847 }
848 fepriv->thread = fe_thread;
849 return 0;
850}
851
852static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
853 u32 *freq_min, u32 *freq_max)
854{
855 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
856
857 if (fe->ops.info.frequency_max == 0)
858 *freq_max = fe->ops.tuner_ops.info.frequency_max;
859 else if (fe->ops.tuner_ops.info.frequency_max == 0)
860 *freq_max = fe->ops.info.frequency_max;
861 else
862 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
863
864 if (*freq_min == 0 || *freq_max == 0)
865 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
866 fe->dvb->num,fe->id);
867}
868
869static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
870{
871 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
872 u32 freq_min;
873 u32 freq_max;
874
875 /* range check: frequency */
876 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
877 if ((freq_min && c->frequency < freq_min) ||
878 (freq_max && c->frequency > freq_max)) {
879 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
880 fe->dvb->num, fe->id, c->frequency, freq_min, freq_max);
881 return -EINVAL;
882 }
883
884 /* range check: symbol rate */
885 switch (c->delivery_system) {
886 case SYS_DVBS:
887 case SYS_DVBS2:
888 case SYS_TURBO:
889 case SYS_DVBC_ANNEX_A:
890 case SYS_DVBC_ANNEX_C:
891 if ((fe->ops.info.symbol_rate_min &&
892 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
893 (fe->ops.info.symbol_rate_max &&
894 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
895 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
896 fe->dvb->num, fe->id, c->symbol_rate,
897 fe->ops.info.symbol_rate_min,
898 fe->ops.info.symbol_rate_max);
899 return -EINVAL;
900 }
901 default:
902 break;
903 }
904
905 return 0;
906}
907
908static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
909{
910 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
911 int i;
912 u32 delsys;
913
914 delsys = c->delivery_system;
915 memset(c, 0, sizeof(struct dtv_frontend_properties));
916 c->delivery_system = delsys;
917
918 c->state = DTV_CLEAR;
919
920 dprintk("%s() Clearing cache for delivery system %d\n", __func__,
921 c->delivery_system);
922
923 c->transmission_mode = TRANSMISSION_MODE_AUTO;
924 c->bandwidth_hz = 0; /* AUTO */
925 c->guard_interval = GUARD_INTERVAL_AUTO;
926 c->hierarchy = HIERARCHY_AUTO;
927 c->symbol_rate = 0;
928 c->code_rate_HP = FEC_AUTO;
929 c->code_rate_LP = FEC_AUTO;
930 c->fec_inner = FEC_AUTO;
931 c->rolloff = ROLLOFF_AUTO;
932 c->voltage = SEC_VOLTAGE_OFF;
933 c->sectone = SEC_TONE_OFF;
934 c->pilot = PILOT_AUTO;
935
936 c->isdbt_partial_reception = 0;
937 c->isdbt_sb_mode = 0;
938 c->isdbt_sb_subchannel = 0;
939 c->isdbt_sb_segment_idx = 0;
940 c->isdbt_sb_segment_count = 0;
941 c->isdbt_layer_enabled = 0;
942 for (i = 0; i < 3; i++) {
943 c->layer[i].fec = FEC_AUTO;
944 c->layer[i].modulation = QAM_AUTO;
945 c->layer[i].interleaving = 0;
946 c->layer[i].segment_count = 0;
947 }
948
949 c->isdbs_ts_id = 0;
950 c->dvbt2_plp_id = 0;
951
952 switch (c->delivery_system) {
953 case SYS_DVBS:
954 case SYS_DVBS2:
955 case SYS_TURBO:
956 c->modulation = QPSK; /* implied for DVB-S in legacy API */
957 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
958 break;
959 case SYS_ATSC:
960 c->modulation = VSB_8;
961 break;
962 default:
963 c->modulation = QAM_AUTO;
964 break;
965 }
966
967 return 0;
968}
969
970#define _DTV_CMD(n, s, b) \
971[n] = { \
972 .name = #n, \
973 .cmd = n, \
974 .set = s,\
975 .buffer = b \
976}
977
978static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
979 _DTV_CMD(DTV_TUNE, 1, 0),
980 _DTV_CMD(DTV_CLEAR, 1, 0),
981
982 /* Set */
983 _DTV_CMD(DTV_FREQUENCY, 1, 0),
984 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
985 _DTV_CMD(DTV_MODULATION, 1, 0),
986 _DTV_CMD(DTV_INVERSION, 1, 0),
987 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
988 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
989 _DTV_CMD(DTV_INNER_FEC, 1, 0),
990 _DTV_CMD(DTV_VOLTAGE, 1, 0),
991 _DTV_CMD(DTV_TONE, 1, 0),
992 _DTV_CMD(DTV_PILOT, 1, 0),
993 _DTV_CMD(DTV_ROLLOFF, 1, 0),
994 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
995 _DTV_CMD(DTV_HIERARCHY, 1, 0),
996 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
997 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
998 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
999 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1000 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1001
1002 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1003 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1004 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1005 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1006 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1007 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1008 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1009 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1010 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1011 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1012 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1013 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1014 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1015 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1016 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1017 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1018 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1019 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1020
1021 _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
1022 _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
1023
1024 /* Get */
1025 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1026 _DTV_CMD(DTV_API_VERSION, 0, 0),
1027 _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
1028 _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
1029 _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
1030 _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
1031 _DTV_CMD(DTV_HIERARCHY, 0, 0),
1032 _DTV_CMD(DTV_INTERLEAVING, 0, 0),
1033
1034 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1035
1036 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1037 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1038
1039 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1040 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 0, 0),
1041 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1042 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1043 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1044 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1045 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1046 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 0, 0),
1047 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1048 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1049 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1050 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1051 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1052 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1053 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1054};
1055
1056static void dtv_property_dump(struct dtv_property *tvp)
1057{
1058 int i;
1059
1060 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1061 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1062 __func__, tvp->cmd);
1063 return;
1064 }
1065
1066 dprintk("%s() tvp.cmd = 0x%08x (%s)\n"
1067 ,__func__
1068 ,tvp->cmd
1069 ,dtv_cmds[ tvp->cmd ].name);
1070
1071 if(dtv_cmds[ tvp->cmd ].buffer) {
1072
1073 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1074 ,__func__
1075 ,tvp->u.buffer.len);
1076
1077 for(i = 0; i < tvp->u.buffer.len; i++)
1078 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1079 ,__func__
1080 ,i
1081 ,tvp->u.buffer.data[i]);
1082
1083 } else
1084 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1085}
1086
1087/* Synchronise the legacy tuning parameters into the cache, so that demodulator
1088 * drivers can use a single set_frontend tuning function, regardless of whether
1089 * it's being used for the legacy or new API, reducing code and complexity.
1090 */
1091static int dtv_property_cache_sync(struct dvb_frontend *fe,
1092 struct dtv_frontend_properties *c,
1093 const struct dvb_frontend_parameters *p)
1094{
1095 c->frequency = p->frequency;
1096 c->inversion = p->inversion;
1097
1098 switch (dvbv3_type(c->delivery_system)) {
1099 case DVBV3_QPSK:
1100 dprintk("%s() Preparing QPSK req\n", __func__);
1101 c->symbol_rate = p->u.qpsk.symbol_rate;
1102 c->fec_inner = p->u.qpsk.fec_inner;
1103 break;
1104 case DVBV3_QAM:
1105 dprintk("%s() Preparing QAM req\n", __func__);
1106 c->symbol_rate = p->u.qam.symbol_rate;
1107 c->fec_inner = p->u.qam.fec_inner;
1108 c->modulation = p->u.qam.modulation;
1109 break;
1110 case DVBV3_OFDM:
1111 dprintk("%s() Preparing OFDM req\n", __func__);
1112 switch (p->u.ofdm.bandwidth) {
1113 case BANDWIDTH_10_MHZ:
1114 c->bandwidth_hz = 10000000;
1115 break;
1116 case BANDWIDTH_8_MHZ:
1117 c->bandwidth_hz = 8000000;
1118 break;
1119 case BANDWIDTH_7_MHZ:
1120 c->bandwidth_hz = 7000000;
1121 break;
1122 case BANDWIDTH_6_MHZ:
1123 c->bandwidth_hz = 6000000;
1124 break;
1125 case BANDWIDTH_5_MHZ:
1126 c->bandwidth_hz = 5000000;
1127 break;
1128 case BANDWIDTH_1_712_MHZ:
1129 c->bandwidth_hz = 1712000;
1130 break;
1131 case BANDWIDTH_AUTO:
1132 c->bandwidth_hz = 0;
1133 }
1134
1135 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1136 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1137 c->modulation = p->u.ofdm.constellation;
1138 c->transmission_mode = p->u.ofdm.transmission_mode;
1139 c->guard_interval = p->u.ofdm.guard_interval;
1140 c->hierarchy = p->u.ofdm.hierarchy_information;
1141 break;
1142 case DVBV3_ATSC:
1143 dprintk("%s() Preparing ATSC req\n", __func__);
1144 c->modulation = p->u.vsb.modulation;
1145 if (c->delivery_system == SYS_ATSCMH)
1146 break;
1147 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1148 c->delivery_system = SYS_ATSC;
1149 else
1150 c->delivery_system = SYS_DVBC_ANNEX_B;
1151 break;
1152 case DVBV3_UNKNOWN:
1153 printk(KERN_ERR
1154 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1155 __func__, c->delivery_system);
1156 return -EINVAL;
1157 }
1158
1159 return 0;
1160}
1161
1162/* Ensure the cached values are set correctly in the frontend
1163 * legacy tuning structures, for the advanced tuning API.
1164 */
1165static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1166 struct dvb_frontend_parameters *p)
1167{
1168 const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1169
1170 p->frequency = c->frequency;
1171 p->inversion = c->inversion;
1172
1173 switch (dvbv3_type(c->delivery_system)) {
1174 case DVBV3_UNKNOWN:
1175 printk(KERN_ERR
1176 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1177 __func__, c->delivery_system);
1178 return -EINVAL;
1179 case DVBV3_QPSK:
1180 dprintk("%s() Preparing QPSK req\n", __func__);
1181 p->u.qpsk.symbol_rate = c->symbol_rate;
1182 p->u.qpsk.fec_inner = c->fec_inner;
1183 break;
1184 case DVBV3_QAM:
1185 dprintk("%s() Preparing QAM req\n", __func__);
1186 p->u.qam.symbol_rate = c->symbol_rate;
1187 p->u.qam.fec_inner = c->fec_inner;
1188 p->u.qam.modulation = c->modulation;
1189 break;
1190 case DVBV3_OFDM:
1191 dprintk("%s() Preparing OFDM req\n", __func__);
1192
1193 switch (c->bandwidth_hz) {
1194 case 10000000:
1195 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1196 break;
1197 case 8000000:
1198 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1199 break;
1200 case 7000000:
1201 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1202 break;
1203 case 6000000:
1204 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1205 break;
1206 case 5000000:
1207 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1208 break;
1209 case 1712000:
1210 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1211 break;
1212 case 0:
1213 default:
1214 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1215 }
1216 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1217 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1218 p->u.ofdm.constellation = c->modulation;
1219 p->u.ofdm.transmission_mode = c->transmission_mode;
1220 p->u.ofdm.guard_interval = c->guard_interval;
1221 p->u.ofdm.hierarchy_information = c->hierarchy;
1222 break;
1223 case DVBV3_ATSC:
1224 dprintk("%s() Preparing VSB req\n", __func__);
1225 p->u.vsb.modulation = c->modulation;
1226 break;
1227 }
1228 return 0;
1229}
1230
1231/**
1232 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1233 * @fe: struct dvb_frontend pointer
1234 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1235 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1236 *
1237 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1238 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1239 * If p_out is not null, it will update the DVBv3 params pointed by it.
1240 */
1241static int dtv_get_frontend(struct dvb_frontend *fe,
1242 struct dvb_frontend_parameters *p_out)
1243{
1244 int r;
1245
1246 if (fe->ops.get_frontend) {
1247 r = fe->ops.get_frontend(fe);
1248 if (unlikely(r < 0))
1249 return r;
1250 if (p_out)
1251 dtv_property_legacy_params_sync(fe, p_out);
1252 return 0;
1253 }
1254
1255 /* As everything is in cache, get_frontend fops are always supported */
1256 return 0;
1257}
1258
1259static int dvb_frontend_ioctl_legacy(struct file *file,
1260 unsigned int cmd, void *parg);
1261static int dvb_frontend_ioctl_properties(struct file *file,
1262 unsigned int cmd, void *parg);
1263
1264static int dtv_property_process_get(struct dvb_frontend *fe,
1265 const struct dtv_frontend_properties *c,
1266 struct dtv_property *tvp,
1267 struct file *file)
1268{
1269 int r, ncaps;
1270
1271 switch(tvp->cmd) {
1272 case DTV_ENUM_DELSYS:
1273 ncaps = 0;
1274 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1275 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1276 ncaps++;
1277 }
1278 tvp->u.buffer.len = ncaps;
1279 break;
1280 case DTV_FREQUENCY:
1281 tvp->u.data = c->frequency;
1282 break;
1283 case DTV_MODULATION:
1284 tvp->u.data = c->modulation;
1285 break;
1286 case DTV_BANDWIDTH_HZ:
1287 tvp->u.data = c->bandwidth_hz;
1288 break;
1289 case DTV_INVERSION:
1290 tvp->u.data = c->inversion;
1291 break;
1292 case DTV_SYMBOL_RATE:
1293 tvp->u.data = c->symbol_rate;
1294 break;
1295 case DTV_INNER_FEC:
1296 tvp->u.data = c->fec_inner;
1297 break;
1298 case DTV_PILOT:
1299 tvp->u.data = c->pilot;
1300 break;
1301 case DTV_ROLLOFF:
1302 tvp->u.data = c->rolloff;
1303 break;
1304 case DTV_DELIVERY_SYSTEM:
1305 tvp->u.data = c->delivery_system;
1306 break;
1307 case DTV_VOLTAGE:
1308 tvp->u.data = c->voltage;
1309 break;
1310 case DTV_TONE:
1311 tvp->u.data = c->sectone;
1312 break;
1313 case DTV_API_VERSION:
1314 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1315 break;
1316 case DTV_CODE_RATE_HP:
1317 tvp->u.data = c->code_rate_HP;
1318 break;
1319 case DTV_CODE_RATE_LP:
1320 tvp->u.data = c->code_rate_LP;
1321 break;
1322 case DTV_GUARD_INTERVAL:
1323 tvp->u.data = c->guard_interval;
1324 break;
1325 case DTV_TRANSMISSION_MODE:
1326 tvp->u.data = c->transmission_mode;
1327 break;
1328 case DTV_HIERARCHY:
1329 tvp->u.data = c->hierarchy;
1330 break;
1331 case DTV_INTERLEAVING:
1332 tvp->u.data = c->interleaving;
1333 break;
1334
1335 /* ISDB-T Support here */
1336 case DTV_ISDBT_PARTIAL_RECEPTION:
1337 tvp->u.data = c->isdbt_partial_reception;
1338 break;
1339 case DTV_ISDBT_SOUND_BROADCASTING:
1340 tvp->u.data = c->isdbt_sb_mode;
1341 break;
1342 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1343 tvp->u.data = c->isdbt_sb_subchannel;
1344 break;
1345 case DTV_ISDBT_SB_SEGMENT_IDX:
1346 tvp->u.data = c->isdbt_sb_segment_idx;
1347 break;
1348 case DTV_ISDBT_SB_SEGMENT_COUNT:
1349 tvp->u.data = c->isdbt_sb_segment_count;
1350 break;
1351 case DTV_ISDBT_LAYER_ENABLED:
1352 tvp->u.data = c->isdbt_layer_enabled;
1353 break;
1354 case DTV_ISDBT_LAYERA_FEC:
1355 tvp->u.data = c->layer[0].fec;
1356 break;
1357 case DTV_ISDBT_LAYERA_MODULATION:
1358 tvp->u.data = c->layer[0].modulation;
1359 break;
1360 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1361 tvp->u.data = c->layer[0].segment_count;
1362 break;
1363 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1364 tvp->u.data = c->layer[0].interleaving;
1365 break;
1366 case DTV_ISDBT_LAYERB_FEC:
1367 tvp->u.data = c->layer[1].fec;
1368 break;
1369 case DTV_ISDBT_LAYERB_MODULATION:
1370 tvp->u.data = c->layer[1].modulation;
1371 break;
1372 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1373 tvp->u.data = c->layer[1].segment_count;
1374 break;
1375 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1376 tvp->u.data = c->layer[1].interleaving;
1377 break;
1378 case DTV_ISDBT_LAYERC_FEC:
1379 tvp->u.data = c->layer[2].fec;
1380 break;
1381 case DTV_ISDBT_LAYERC_MODULATION:
1382 tvp->u.data = c->layer[2].modulation;
1383 break;
1384 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1385 tvp->u.data = c->layer[2].segment_count;
1386 break;
1387 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1388 tvp->u.data = c->layer[2].interleaving;
1389 break;
1390 case DTV_ISDBS_TS_ID:
1391 tvp->u.data = c->isdbs_ts_id;
1392 break;
1393 case DTV_DVBT2_PLP_ID:
1394 tvp->u.data = c->dvbt2_plp_id;
1395 break;
1396
1397 /* ATSC-MH */
1398 case DTV_ATSCMH_FIC_VER:
1399 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1400 break;
1401 case DTV_ATSCMH_PARADE_ID:
1402 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1403 break;
1404 case DTV_ATSCMH_NOG:
1405 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1406 break;
1407 case DTV_ATSCMH_TNOG:
1408 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1409 break;
1410 case DTV_ATSCMH_SGN:
1411 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1412 break;
1413 case DTV_ATSCMH_PRC:
1414 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1415 break;
1416 case DTV_ATSCMH_RS_FRAME_MODE:
1417 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1418 break;
1419 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1420 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1421 break;
1422 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1423 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1424 break;
1425 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1426 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1427 break;
1428 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1429 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1430 break;
1431 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1432 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1433 break;
1434 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1435 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1436 break;
1437 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1438 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1439 break;
1440 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1441 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1442 break;
1443
1444 default:
1445 return -EINVAL;
1446 }
1447
1448 /* Allow the frontend to override outgoing properties */
1449 if (fe->ops.get_property) {
1450 r = fe->ops.get_property(fe, tvp);
1451 if (r < 0)
1452 return r;
1453 }
1454
1455 dtv_property_dump(tvp);
1456
1457 return 0;
1458}
1459
1460static int dtv_set_frontend(struct dvb_frontend *fe);
1461
1462static bool is_dvbv3_delsys(u32 delsys)
1463{
1464 bool status;
1465
1466 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1467 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1468
1469 return status;
1470}
1471
1472static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system)
1473{
1474 int ncaps, i;
1475 u32 delsys = SYS_UNDEFINED;
1476 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1477 enum dvbv3_emulation_type type;
1478
1479 /*
1480 * It was reported that some old DVBv5 applications were
1481 * filling delivery_system with SYS_UNDEFINED. If this happens,
1482 * assume that the application wants to use the first supported
1483 * delivery system.
1484 */
1485 if (c->delivery_system == SYS_UNDEFINED)
1486 c->delivery_system = fe->ops.delsys[0];
1487
1488 if (desired_system == SYS_UNDEFINED) {
1489 /*
1490 * A DVBv3 call doesn't know what's the desired system.
1491 * Also, DVBv3 applications don't know that ops.info->type
1492 * could be changed, and they simply dies when it doesn't
1493 * match.
1494 * So, don't change the current delivery system, as it
1495 * may be trying to do the wrong thing, like setting an
1496 * ISDB-T frontend as DVB-T. Instead, find the closest
1497 * DVBv3 system that matches the delivery system.
1498 */
1499 if (is_dvbv3_delsys(c->delivery_system)) {
1500 dprintk("%s() Using delivery system to %d\n",
1501 __func__, c->delivery_system);
1502 return 0;
1503 }
1504 type = dvbv3_type(c->delivery_system);
1505 switch (type) {
1506 case DVBV3_QPSK:
1507 desired_system = SYS_DVBS;
1508 break;
1509 case DVBV3_QAM:
1510 desired_system = SYS_DVBC_ANNEX_A;
1511 break;
1512 case DVBV3_ATSC:
1513 desired_system = SYS_ATSC;
1514 break;
1515 case DVBV3_OFDM:
1516 desired_system = SYS_DVBT;
1517 break;
1518 default:
1519 dprintk("%s(): This frontend doesn't support DVBv3 calls\n",
1520 __func__);
1521 return -EINVAL;
1522 }
1523 /*
1524 * Get a delivery system that is compatible with DVBv3
1525 * NOTE: in order for this to work with softwares like Kaffeine that
1526 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1527 * DVB-S, drivers that support both should put the SYS_DVBS entry
1528 * before the SYS_DVBS2, otherwise it won't switch back to DVB-S.
1529 * The real fix is that userspace applications should not use DVBv3
1530 * and not trust on calling FE_SET_FRONTEND to switch the delivery
1531 * system.
1532 */
1533 ncaps = 0;
1534 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1535 if (fe->ops.delsys[ncaps] == desired_system) {
1536 delsys = desired_system;
1537 break;
1538 }
1539 ncaps++;
1540 }
1541 if (delsys == SYS_UNDEFINED) {
1542 dprintk("%s() Couldn't find a delivery system that matches %d\n",
1543 __func__, desired_system);
1544 }
1545 } else {
1546 /*
1547 * This is a DVBv5 call. So, it likely knows the supported
1548 * delivery systems.
1549 */
1550
1551 /* Check if the desired delivery system is supported */
1552 ncaps = 0;
1553 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1554 if (fe->ops.delsys[ncaps] == desired_system) {
1555 c->delivery_system = desired_system;
1556 dprintk("%s() Changing delivery system to %d\n",
1557 __func__, desired_system);
1558 return 0;
1559 }
1560 ncaps++;
1561 }
1562 type = dvbv3_type(desired_system);
1563
1564 /*
1565 * The delivery system is not supported. See if it can be
1566 * emulated.
1567 * The emulation only works if the desired system is one of the
1568 * DVBv3 delivery systems
1569 */
1570 if (!is_dvbv3_delsys(desired_system)) {
1571 dprintk("%s() can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n",
1572 __func__);
1573 return -EINVAL;
1574 }
1575
1576 /*
1577 * Get the last non-DVBv3 delivery system that has the same type
1578 * of the desired system
1579 */
1580 ncaps = 0;
1581 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1582 if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) &&
1583 !is_dvbv3_delsys(fe->ops.delsys[ncaps]))
1584 delsys = fe->ops.delsys[ncaps];
1585 ncaps++;
1586 }
1587 /* There's nothing compatible with the desired delivery system */
1588 if (delsys == SYS_UNDEFINED) {
1589 dprintk("%s() Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n",
1590 __func__);
1591 return -EINVAL;
1592 }
1593 }
1594
1595 c->delivery_system = delsys;
1596
1597 /*
1598 * The DVBv3 or DVBv5 call is requesting a different system. So,
1599 * emulation is needed.
1600 *
1601 * Emulate newer delivery systems like ISDBT, DVBT and DTMB
1602 * for older DVBv5 applications. The emulation will try to use
1603 * the auto mode for most things, and will assume that the desired
1604 * delivery system is the last one at the ops.delsys[] array
1605 */
1606 dprintk("%s() Using delivery system %d emulated as if it were a %d\n",
1607 __func__, delsys, desired_system);
1608
1609 /*
1610 * For now, handles ISDB-T calls. More code may be needed here for the
1611 * other emulated stuff
1612 */
1613 if (type == DVBV3_OFDM) {
1614 if (c->delivery_system == SYS_ISDBT) {
1615 dprintk("%s() Using defaults for SYS_ISDBT\n",
1616 __func__);
1617 if (!c->bandwidth_hz)
1618 c->bandwidth_hz = 6000000;
1619
1620 c->isdbt_partial_reception = 0;
1621 c->isdbt_sb_mode = 0;
1622 c->isdbt_sb_subchannel = 0;
1623 c->isdbt_sb_segment_idx = 0;
1624 c->isdbt_sb_segment_count = 0;
1625 c->isdbt_layer_enabled = 0;
1626 for (i = 0; i < 3; i++) {
1627 c->layer[i].fec = FEC_AUTO;
1628 c->layer[i].modulation = QAM_AUTO;
1629 c->layer[i].interleaving = 0;
1630 c->layer[i].segment_count = 0;
1631 }
1632 }
1633 }
1634 dprintk("change delivery system on cache to %d\n", c->delivery_system);
1635
1636 return 0;
1637}
1638
1639static int dtv_property_process_set(struct dvb_frontend *fe,
1640 struct dtv_property *tvp,
1641 struct file *file)
1642{
1643 int r = 0;
1644 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1645
1646 /* Allow the frontend to validate incoming properties */
1647 if (fe->ops.set_property) {
1648 r = fe->ops.set_property(fe, tvp);
1649 if (r < 0)
1650 return r;
1651 }
1652
1653 switch(tvp->cmd) {
1654 case DTV_CLEAR:
1655 /*
1656 * Reset a cache of data specific to the frontend here. This does
1657 * not effect hardware.
1658 */
1659 dvb_frontend_clear_cache(fe);
1660 break;
1661 case DTV_TUNE:
1662 /* interpret the cache of data, build either a traditional frontend
1663 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1664 * ioctl.
1665 */
1666 c->state = tvp->cmd;
1667 dprintk("%s() Finalised property cache\n", __func__);
1668
1669 r = dtv_set_frontend(fe);
1670 break;
1671 case DTV_FREQUENCY:
1672 c->frequency = tvp->u.data;
1673 break;
1674 case DTV_MODULATION:
1675 c->modulation = tvp->u.data;
1676 break;
1677 case DTV_BANDWIDTH_HZ:
1678 c->bandwidth_hz = tvp->u.data;
1679 break;
1680 case DTV_INVERSION:
1681 c->inversion = tvp->u.data;
1682 break;
1683 case DTV_SYMBOL_RATE:
1684 c->symbol_rate = tvp->u.data;
1685 break;
1686 case DTV_INNER_FEC:
1687 c->fec_inner = tvp->u.data;
1688 break;
1689 case DTV_PILOT:
1690 c->pilot = tvp->u.data;
1691 break;
1692 case DTV_ROLLOFF:
1693 c->rolloff = tvp->u.data;
1694 break;
1695 case DTV_DELIVERY_SYSTEM:
1696 r = set_delivery_system(fe, tvp->u.data);
1697 break;
1698 case DTV_VOLTAGE:
1699 c->voltage = tvp->u.data;
1700 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1701 (void *)c->voltage);
1702 break;
1703 case DTV_TONE:
1704 c->sectone = tvp->u.data;
1705 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1706 (void *)c->sectone);
1707 break;
1708 case DTV_CODE_RATE_HP:
1709 c->code_rate_HP = tvp->u.data;
1710 break;
1711 case DTV_CODE_RATE_LP:
1712 c->code_rate_LP = tvp->u.data;
1713 break;
1714 case DTV_GUARD_INTERVAL:
1715 c->guard_interval = tvp->u.data;
1716 break;
1717 case DTV_TRANSMISSION_MODE:
1718 c->transmission_mode = tvp->u.data;
1719 break;
1720 case DTV_HIERARCHY:
1721 c->hierarchy = tvp->u.data;
1722 break;
1723 case DTV_INTERLEAVING:
1724 c->interleaving = tvp->u.data;
1725 break;
1726
1727 /* ISDB-T Support here */
1728 case DTV_ISDBT_PARTIAL_RECEPTION:
1729 c->isdbt_partial_reception = tvp->u.data;
1730 break;
1731 case DTV_ISDBT_SOUND_BROADCASTING:
1732 c->isdbt_sb_mode = tvp->u.data;
1733 break;
1734 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1735 c->isdbt_sb_subchannel = tvp->u.data;
1736 break;
1737 case DTV_ISDBT_SB_SEGMENT_IDX:
1738 c->isdbt_sb_segment_idx = tvp->u.data;
1739 break;
1740 case DTV_ISDBT_SB_SEGMENT_COUNT:
1741 c->isdbt_sb_segment_count = tvp->u.data;
1742 break;
1743 case DTV_ISDBT_LAYER_ENABLED:
1744 c->isdbt_layer_enabled = tvp->u.data;
1745 break;
1746 case DTV_ISDBT_LAYERA_FEC:
1747 c->layer[0].fec = tvp->u.data;
1748 break;
1749 case DTV_ISDBT_LAYERA_MODULATION:
1750 c->layer[0].modulation = tvp->u.data;
1751 break;
1752 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1753 c->layer[0].segment_count = tvp->u.data;
1754 break;
1755 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1756 c->layer[0].interleaving = tvp->u.data;
1757 break;
1758 case DTV_ISDBT_LAYERB_FEC:
1759 c->layer[1].fec = tvp->u.data;
1760 break;
1761 case DTV_ISDBT_LAYERB_MODULATION:
1762 c->layer[1].modulation = tvp->u.data;
1763 break;
1764 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1765 c->layer[1].segment_count = tvp->u.data;
1766 break;
1767 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1768 c->layer[1].interleaving = tvp->u.data;
1769 break;
1770 case DTV_ISDBT_LAYERC_FEC:
1771 c->layer[2].fec = tvp->u.data;
1772 break;
1773 case DTV_ISDBT_LAYERC_MODULATION:
1774 c->layer[2].modulation = tvp->u.data;
1775 break;
1776 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1777 c->layer[2].segment_count = tvp->u.data;
1778 break;
1779 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1780 c->layer[2].interleaving = tvp->u.data;
1781 break;
1782 case DTV_ISDBS_TS_ID:
1783 c->isdbs_ts_id = tvp->u.data;
1784 break;
1785 case DTV_DVBT2_PLP_ID:
1786 c->dvbt2_plp_id = tvp->u.data;
1787 break;
1788
1789 /* ATSC-MH */
1790 case DTV_ATSCMH_PARADE_ID:
1791 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1792 break;
1793 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1794 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1795 break;
1796
1797 default:
1798 return -EINVAL;
1799 }
1800
1801 return r;
1802}
1803
1804static int dvb_frontend_ioctl(struct file *file,
1805 unsigned int cmd, void *parg)
1806{
1807 struct dvb_device *dvbdev = file->private_data;
1808 struct dvb_frontend *fe = dvbdev->priv;
1809 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1810 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1811 int err = -EOPNOTSUPP;
1812
1813 dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1814
1815 if (fepriv->exit != DVB_FE_NO_EXIT)
1816 return -ENODEV;
1817
1818 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1819 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1820 cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1821 return -EPERM;
1822
1823 if (down_interruptible (&fepriv->sem))
1824 return -ERESTARTSYS;
1825
1826 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1827 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1828 else {
1829 c->state = DTV_UNDEFINED;
1830 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1831 }
1832
1833 up(&fepriv->sem);
1834 return err;
1835}
1836
1837static int dvb_frontend_ioctl_properties(struct file *file,
1838 unsigned int cmd, void *parg)
1839{
1840 struct dvb_device *dvbdev = file->private_data;
1841 struct dvb_frontend *fe = dvbdev->priv;
1842 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1843 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1844 int err = 0;
1845
1846 struct dtv_properties *tvps = NULL;
1847 struct dtv_property *tvp = NULL;
1848 int i;
1849
1850 dprintk("%s\n", __func__);
1851
1852 if(cmd == FE_SET_PROPERTY) {
1853 tvps = (struct dtv_properties __user *)parg;
1854
1855 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1856 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1857
1858 /* Put an arbitrary limit on the number of messages that can
1859 * be sent at once */
1860 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1861 return -EINVAL;
1862
1863 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1864 if (!tvp) {
1865 err = -ENOMEM;
1866 goto out;
1867 }
1868
1869 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1870 err = -EFAULT;
1871 goto out;
1872 }
1873
1874 for (i = 0; i < tvps->num; i++) {
1875 err = dtv_property_process_set(fe, tvp + i, file);
1876 if (err < 0)
1877 goto out;
1878 (tvp + i)->result = err;
1879 }
1880
1881 if (c->state == DTV_TUNE)
1882 dprintk("%s() Property cache is full, tuning\n", __func__);
1883
1884 } else
1885 if(cmd == FE_GET_PROPERTY) {
1886 tvps = (struct dtv_properties __user *)parg;
1887
1888 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1889 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1890
1891 /* Put an arbitrary limit on the number of messages that can
1892 * be sent at once */
1893 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1894 return -EINVAL;
1895
1896 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1897 if (!tvp) {
1898 err = -ENOMEM;
1899 goto out;
1900 }
1901
1902 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1903 err = -EFAULT;
1904 goto out;
1905 }
1906
1907 /*
1908 * Fills the cache out struct with the cache contents, plus
1909 * the data retrieved from get_frontend, if the frontend
1910 * is not idle. Otherwise, returns the cached content
1911 */
1912 if (fepriv->state != FESTATE_IDLE) {
1913 err = dtv_get_frontend(fe, NULL);
1914 if (err < 0)
1915 goto out;
1916 }
1917 for (i = 0; i < tvps->num; i++) {
1918 err = dtv_property_process_get(fe, c, tvp + i, file);
1919 if (err < 0)
1920 goto out;
1921 (tvp + i)->result = err;
1922 }
1923
1924 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1925 err = -EFAULT;
1926 goto out;
1927 }
1928
1929 } else
1930 err = -EOPNOTSUPP;
1931
1932out:
1933 kfree(tvp);
1934 return err;
1935}
1936
1937static int dtv_set_frontend(struct dvb_frontend *fe)
1938{
1939 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1940 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1941 struct dvb_frontend_tune_settings fetunesettings;
1942 u32 rolloff = 0;
1943
1944 if (dvb_frontend_check_parameters(fe) < 0)
1945 return -EINVAL;
1946
1947 /*
1948 * Initialize output parameters to match the values given by
1949 * the user. FE_SET_FRONTEND triggers an initial frontend event
1950 * with status = 0, which copies output parameters to userspace.
1951 */
1952 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
1953
1954 /*
1955 * Be sure that the bandwidth will be filled for all
1956 * non-satellite systems, as tuners need to know what
1957 * low pass/Nyquist half filter should be applied, in
1958 * order to avoid inter-channel noise.
1959 *
1960 * ISDB-T and DVB-T/T2 already sets bandwidth.
1961 * ATSC and DVB-C don't set, so, the core should fill it.
1962 *
1963 * On DVB-C Annex A and C, the bandwidth is a function of
1964 * the roll-off and symbol rate. Annex B defines different
1965 * roll-off factors depending on the modulation. Fortunately,
1966 * Annex B is only used with 6MHz, so there's no need to
1967 * calculate it.
1968 *
1969 * While not officially supported, a side effect of handling it at
1970 * the cache level is that a program could retrieve the bandwidth
1971 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1972 */
1973 switch (c->delivery_system) {
1974 case SYS_ATSC:
1975 case SYS_DVBC_ANNEX_B:
1976 c->bandwidth_hz = 6000000;
1977 break;
1978 case SYS_DVBC_ANNEX_A:
1979 rolloff = 115;
1980 break;
1981 case SYS_DVBC_ANNEX_C:
1982 rolloff = 113;
1983 break;
1984 default:
1985 break;
1986 }
1987 if (rolloff)
1988 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
1989
1990 /* force auto frequency inversion if requested */
1991 if (dvb_force_auto_inversion)
1992 c->inversion = INVERSION_AUTO;
1993
1994 /*
1995 * without hierarchical coding code_rate_LP is irrelevant,
1996 * so we tolerate the otherwise invalid FEC_NONE setting
1997 */
1998 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
1999 c->code_rate_LP = FEC_AUTO;
2000
2001 /* get frontend-specific tuning settings */
2002 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2003 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2004 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2005 fepriv->max_drift = fetunesettings.max_drift;
2006 fepriv->step_size = fetunesettings.step_size;
2007 } else {
2008 /* default values */
2009 switch (c->delivery_system) {
2010 case SYS_DVBS:
2011 case SYS_DVBS2:
2012 case SYS_ISDBS:
2013 case SYS_TURBO:
2014 case SYS_DVBC_ANNEX_A:
2015 case SYS_DVBC_ANNEX_C:
2016 fepriv->min_delay = HZ / 20;
2017 fepriv->step_size = c->symbol_rate / 16000;
2018 fepriv->max_drift = c->symbol_rate / 2000;
2019 break;
2020 case SYS_DVBT:
2021 case SYS_DVBT2:
2022 case SYS_ISDBT:
2023 case SYS_DTMB:
2024 fepriv->min_delay = HZ / 20;
2025 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2026 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2027 break;
2028 default:
2029 /*
2030 * FIXME: This sounds wrong! if freqency_stepsize is
2031 * defined by the frontend, why not use it???
2032 */
2033 fepriv->min_delay = HZ / 20;
2034 fepriv->step_size = 0; /* no zigzag */
2035 fepriv->max_drift = 0;
2036 break;
2037 }
2038 }
2039 if (dvb_override_tune_delay > 0)
2040 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2041
2042 fepriv->state = FESTATE_RETUNE;
2043
2044 /* Request the search algorithm to search */
2045 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2046
2047 dvb_frontend_clear_events(fe);
2048 dvb_frontend_add_event(fe, 0);
2049 dvb_frontend_wakeup(fe);
2050 fepriv->status = 0;
2051
2052 return 0;
2053}
2054
2055
2056static int dvb_frontend_ioctl_legacy(struct file *file,
2057 unsigned int cmd, void *parg)
2058{
2059 struct dvb_device *dvbdev = file->private_data;
2060 struct dvb_frontend *fe = dvbdev->priv;
2061 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2062 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2063 int err = -EOPNOTSUPP;
2064
2065 switch (cmd) {
2066 case FE_GET_INFO: {
2067 struct dvb_frontend_info* info = parg;
2068
2069 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2070 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2071
2072 /*
2073 * Associate the 4 delivery systems supported by DVBv3
2074 * API with their DVBv5 counterpart. For the other standards,
2075 * use the closest type, assuming that it would hopefully
2076 * work with a DVBv3 application.
2077 * It should be noticed that, on multi-frontend devices with
2078 * different types (terrestrial and cable, for example),
2079 * a pure DVBv3 application won't be able to use all delivery
2080 * systems. Yet, changing the DVBv5 cache to the other delivery
2081 * system should be enough for making it work.
2082 */
2083 switch (dvbv3_type(c->delivery_system)) {
2084 case DVBV3_QPSK:
2085 info->type = FE_QPSK;
2086 break;
2087 case DVBV3_ATSC:
2088 info->type = FE_ATSC;
2089 break;
2090 case DVBV3_QAM:
2091 info->type = FE_QAM;
2092 break;
2093 case DVBV3_OFDM:
2094 info->type = FE_OFDM;
2095 break;
2096 default:
2097 printk(KERN_ERR
2098 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2099 __func__, c->delivery_system);
2100 fe->ops.info.type = FE_OFDM;
2101 }
2102 dprintk("current delivery system on cache: %d, V3 type: %d\n",
2103 c->delivery_system, fe->ops.info.type);
2104
2105 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2106 * do it, it is done for it. */
2107 info->caps |= FE_CAN_INVERSION_AUTO;
2108 err = 0;
2109 break;
2110 }
2111
2112 case FE_READ_STATUS: {
2113 fe_status_t* status = parg;
2114
2115 /* if retune was requested but hasn't occurred yet, prevent
2116 * that user get signal state from previous tuning */
2117 if (fepriv->state == FESTATE_RETUNE ||
2118 fepriv->state == FESTATE_ERROR) {
2119 err=0;
2120 *status = 0;
2121 break;
2122 }
2123
2124 if (fe->ops.read_status)
2125 err = fe->ops.read_status(fe, status);
2126 break;
2127 }
2128 case FE_READ_BER:
2129 if (fe->ops.read_ber)
2130 err = fe->ops.read_ber(fe, (__u32*) parg);
2131 break;
2132
2133 case FE_READ_SIGNAL_STRENGTH:
2134 if (fe->ops.read_signal_strength)
2135 err = fe->ops.read_signal_strength(fe, (__u16*) parg);
2136 break;
2137
2138 case FE_READ_SNR:
2139 if (fe->ops.read_snr)
2140 err = fe->ops.read_snr(fe, (__u16*) parg);
2141 break;
2142
2143 case FE_READ_UNCORRECTED_BLOCKS:
2144 if (fe->ops.read_ucblocks)
2145 err = fe->ops.read_ucblocks(fe, (__u32*) parg);
2146 break;
2147
2148
2149 case FE_DISEQC_RESET_OVERLOAD:
2150 if (fe->ops.diseqc_reset_overload) {
2151 err = fe->ops.diseqc_reset_overload(fe);
2152 fepriv->state = FESTATE_DISEQC;
2153 fepriv->status = 0;
2154 }
2155 break;
2156
2157 case FE_DISEQC_SEND_MASTER_CMD:
2158 if (fe->ops.diseqc_send_master_cmd) {
2159 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2160 fepriv->state = FESTATE_DISEQC;
2161 fepriv->status = 0;
2162 }
2163 break;
2164
2165 case FE_DISEQC_SEND_BURST:
2166 if (fe->ops.diseqc_send_burst) {
2167 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2168 fepriv->state = FESTATE_DISEQC;
2169 fepriv->status = 0;
2170 }
2171 break;
2172
2173 case FE_SET_TONE:
2174 if (fe->ops.set_tone) {
2175 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2176 fepriv->tone = (fe_sec_tone_mode_t) parg;
2177 fepriv->state = FESTATE_DISEQC;
2178 fepriv->status = 0;
2179 }
2180 break;
2181
2182 case FE_SET_VOLTAGE:
2183 if (fe->ops.set_voltage) {
2184 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2185 fepriv->voltage = (fe_sec_voltage_t) parg;
2186 fepriv->state = FESTATE_DISEQC;
2187 fepriv->status = 0;
2188 }
2189 break;
2190
2191 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2192 if (fe->ops.dishnetwork_send_legacy_command) {
2193 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2194 fepriv->state = FESTATE_DISEQC;
2195 fepriv->status = 0;
2196 } else if (fe->ops.set_voltage) {
2197 /*
2198 * NOTE: This is a fallback condition. Some frontends
2199 * (stv0299 for instance) take longer than 8msec to
2200 * respond to a set_voltage command. Those switches
2201 * need custom routines to switch properly. For all
2202 * other frontends, the following should work ok.
2203 * Dish network legacy switches (as used by Dish500)
2204 * are controlled by sending 9-bit command words
2205 * spaced 8msec apart.
2206 * the actual command word is switch/port dependent
2207 * so it is up to the userspace application to send
2208 * the right command.
2209 * The command must always start with a '0' after
2210 * initialization, so parg is 8 bits and does not
2211 * include the initialization or start bit
2212 */
2213 unsigned long swcmd = ((unsigned long) parg) << 1;
2214 struct timeval nexttime;
2215 struct timeval tv[10];
2216 int i;
2217 u8 last = 1;
2218 if (dvb_frontend_debug)
2219 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2220 do_gettimeofday(&nexttime);
2221 if (dvb_frontend_debug)
2222 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
2223 /* before sending a command, initialize by sending
2224 * a 32ms 18V to the switch
2225 */
2226 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2227 dvb_frontend_sleep_until(&nexttime, 32000);
2228
2229 for (i = 0; i < 9; i++) {
2230 if (dvb_frontend_debug)
2231 do_gettimeofday(&tv[i + 1]);
2232 if ((swcmd & 0x01) != last) {
2233 /* set voltage to (last ? 13V : 18V) */
2234 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2235 last = (last) ? 0 : 1;
2236 }
2237 swcmd = swcmd >> 1;
2238 if (i != 8)
2239 dvb_frontend_sleep_until(&nexttime, 8000);
2240 }
2241 if (dvb_frontend_debug) {
2242 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2243 __func__, fe->dvb->num);
2244 for (i = 1; i < 10; i++)
2245 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2246 }
2247 err = 0;
2248 fepriv->state = FESTATE_DISEQC;
2249 fepriv->status = 0;
2250 }
2251 break;
2252
2253 case FE_DISEQC_RECV_SLAVE_REPLY:
2254 if (fe->ops.diseqc_recv_slave_reply)
2255 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2256 break;
2257
2258 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2259 if (fe->ops.enable_high_lnb_voltage)
2260 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2261 break;
2262
2263 case FE_SET_FRONTEND:
2264 err = set_delivery_system(fe, SYS_UNDEFINED);
2265 if (err)
2266 break;
2267
2268 err = dtv_property_cache_sync(fe, c, parg);
2269 if (err)
2270 break;
2271 err = dtv_set_frontend(fe);
2272 break;
2273 case FE_GET_EVENT:
2274 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2275 break;
2276
2277 case FE_GET_FRONTEND:
2278 err = dtv_get_frontend(fe, parg);
2279 break;
2280
2281 case FE_SET_FRONTEND_TUNE_MODE:
2282 fepriv->tune_mode_flags = (unsigned long) parg;
2283 err = 0;
2284 break;
2285 };
2286
2287 return err;
2288}
2289
2290
2291static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2292{
2293 struct dvb_device *dvbdev = file->private_data;
2294 struct dvb_frontend *fe = dvbdev->priv;
2295 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2296
2297 dprintk ("%s\n", __func__);
2298
2299 poll_wait (file, &fepriv->events.wait_queue, wait);
2300
2301 if (fepriv->events.eventw != fepriv->events.eventr)
2302 return (POLLIN | POLLRDNORM | POLLPRI);
2303
2304 return 0;
2305}
2306
2307static int dvb_frontend_open(struct inode *inode, struct file *file)
2308{
2309 struct dvb_device *dvbdev = file->private_data;
2310 struct dvb_frontend *fe = dvbdev->priv;
2311 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2312 struct dvb_adapter *adapter = fe->dvb;
2313 int ret;
2314
2315 dprintk ("%s\n", __func__);
2316 if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2317 return -ENODEV;
2318
2319 if (adapter->mfe_shared) {
2320 mutex_lock (&adapter->mfe_lock);
2321
2322 if (adapter->mfe_dvbdev == NULL)
2323 adapter->mfe_dvbdev = dvbdev;
2324
2325 else if (adapter->mfe_dvbdev != dvbdev) {
2326 struct dvb_device
2327 *mfedev = adapter->mfe_dvbdev;
2328 struct dvb_frontend
2329 *mfe = mfedev->priv;
2330 struct dvb_frontend_private
2331 *mfepriv = mfe->frontend_priv;
2332 int mferetry = (dvb_mfe_wait_time << 1);
2333
2334 mutex_unlock (&adapter->mfe_lock);
2335 while (mferetry-- && (mfedev->users != -1 ||
2336 mfepriv->thread != NULL)) {
2337 if(msleep_interruptible(500)) {
2338 if(signal_pending(current))
2339 return -EINTR;
2340 }
2341 }
2342
2343 mutex_lock (&adapter->mfe_lock);
2344 if(adapter->mfe_dvbdev != dvbdev) {
2345 mfedev = adapter->mfe_dvbdev;
2346 mfe = mfedev->priv;
2347 mfepriv = mfe->frontend_priv;
2348 if (mfedev->users != -1 ||
2349 mfepriv->thread != NULL) {
2350 mutex_unlock (&adapter->mfe_lock);
2351 return -EBUSY;
2352 }
2353 adapter->mfe_dvbdev = dvbdev;
2354 }
2355 }
2356 }
2357
2358 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2359 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2360 goto err0;
2361
2362 /* If we took control of the bus, we need to force
2363 reinitialization. This is because many ts_bus_ctrl()
2364 functions strobe the RESET pin on the demod, and if the
2365 frontend thread already exists then the dvb_init() routine
2366 won't get called (which is what usually does initial
2367 register configuration). */
2368 fepriv->reinitialise = 1;
2369 }
2370
2371 if ((ret = dvb_generic_open (inode, file)) < 0)
2372 goto err1;
2373
2374 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2375 /* normal tune mode when opened R/W */
2376 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2377 fepriv->tone = -1;
2378 fepriv->voltage = -1;
2379
2380 ret = dvb_frontend_start (fe);
2381 if (ret)
2382 goto err2;
2383
2384 /* empty event queue */
2385 fepriv->events.eventr = fepriv->events.eventw = 0;
2386 }
2387
2388 if (adapter->mfe_shared)
2389 mutex_unlock (&adapter->mfe_lock);
2390 return ret;
2391
2392err2:
2393 dvb_generic_release(inode, file);
2394err1:
2395 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2396 fe->ops.ts_bus_ctrl(fe, 0);
2397err0:
2398 if (adapter->mfe_shared)
2399 mutex_unlock (&adapter->mfe_lock);
2400 return ret;
2401}
2402
2403static int dvb_frontend_release(struct inode *inode, struct file *file)
2404{
2405 struct dvb_device *dvbdev = file->private_data;
2406 struct dvb_frontend *fe = dvbdev->priv;
2407 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2408 int ret;
2409
2410 dprintk ("%s\n", __func__);
2411
2412 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2413 fepriv->release_jiffies = jiffies;
2414 mb();
2415 }
2416
2417 ret = dvb_generic_release (inode, file);
2418
2419 if (dvbdev->users == -1) {
2420 wake_up(&fepriv->wait_queue);
2421 if (fepriv->exit != DVB_FE_NO_EXIT) {
2422 fops_put(file->f_op);
2423 file->f_op = NULL;
2424 wake_up(&dvbdev->wait_queue);
2425 }
2426 if (fe->ops.ts_bus_ctrl)
2427 fe->ops.ts_bus_ctrl(fe, 0);
2428 }
2429
2430 return ret;
2431}
2432
2433static const struct file_operations dvb_frontend_fops = {
2434 .owner = THIS_MODULE,
2435 .unlocked_ioctl = dvb_generic_ioctl,
2436 .poll = dvb_frontend_poll,
2437 .open = dvb_frontend_open,
2438 .release = dvb_frontend_release,
2439 .llseek = noop_llseek,
2440};
2441
2442int dvb_register_frontend(struct dvb_adapter* dvb,
2443 struct dvb_frontend* fe)
2444{
2445 struct dvb_frontend_private *fepriv;
2446 static const struct dvb_device dvbdev_template = {
2447 .users = ~0,
2448 .writers = 1,
2449 .readers = (~0)-1,
2450 .fops = &dvb_frontend_fops,
2451 .kernel_ioctl = dvb_frontend_ioctl
2452 };
2453
2454 dprintk ("%s\n", __func__);
2455
2456 if (mutex_lock_interruptible(&frontend_mutex))
2457 return -ERESTARTSYS;
2458
2459 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2460 if (fe->frontend_priv == NULL) {
2461 mutex_unlock(&frontend_mutex);
2462 return -ENOMEM;
2463 }
2464 fepriv = fe->frontend_priv;
2465
2466 sema_init(&fepriv->sem, 1);
2467 init_waitqueue_head (&fepriv->wait_queue);
2468 init_waitqueue_head (&fepriv->events.wait_queue);
2469 mutex_init(&fepriv->events.mtx);
2470 fe->dvb = dvb;
2471 fepriv->inversion = INVERSION_OFF;
2472
2473 printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2474 fe->dvb->num,
2475 fe->id,
2476 fe->ops.info.name);
2477
2478 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2479 fe, DVB_DEVICE_FRONTEND);
2480
2481 /*
2482 * Initialize the cache to the proper values according with the
2483 * first supported delivery system (ops->delsys[0])
2484 */
2485
2486 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2487 dvb_frontend_clear_cache(fe);
2488
2489 mutex_unlock(&frontend_mutex);
2490 return 0;
2491}
2492EXPORT_SYMBOL(dvb_register_frontend);
2493
2494int dvb_unregister_frontend(struct dvb_frontend* fe)
2495{
2496 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2497 dprintk ("%s\n", __func__);
2498
2499 mutex_lock(&frontend_mutex);
2500 dvb_frontend_stop (fe);
2501 mutex_unlock(&frontend_mutex);
2502
2503 if (fepriv->dvbdev->users < -1)
2504 wait_event(fepriv->dvbdev->wait_queue,
2505 fepriv->dvbdev->users==-1);
2506
2507 mutex_lock(&frontend_mutex);
2508 dvb_unregister_device (fepriv->dvbdev);
2509
2510 /* fe is invalid now */
2511 kfree(fepriv);
2512 mutex_unlock(&frontend_mutex);
2513 return 0;
2514}
2515EXPORT_SYMBOL(dvb_unregister_frontend);
2516
2517#ifdef CONFIG_MEDIA_ATTACH
2518void dvb_frontend_detach(struct dvb_frontend* fe)
2519{
2520 void *ptr;
2521
2522 if (fe->ops.release_sec) {
2523 fe->ops.release_sec(fe);
2524 symbol_put_addr(fe->ops.release_sec);
2525 }
2526 if (fe->ops.tuner_ops.release) {
2527 fe->ops.tuner_ops.release(fe);
2528 symbol_put_addr(fe->ops.tuner_ops.release);
2529 }
2530 if (fe->ops.analog_ops.release) {
2531 fe->ops.analog_ops.release(fe);
2532 symbol_put_addr(fe->ops.analog_ops.release);
2533 }
2534 ptr = (void*)fe->ops.release;
2535 if (ptr) {
2536 fe->ops.release(fe);
2537 symbol_put_addr(ptr);
2538 }
2539}
2540#else
2541void dvb_frontend_detach(struct dvb_frontend* fe)
2542{
2543 if (fe->ops.release_sec)
2544 fe->ops.release_sec(fe);
2545 if (fe->ops.tuner_ops.release)
2546 fe->ops.tuner_ops.release(fe);
2547 if (fe->ops.analog_ops.release)
2548 fe->ops.analog_ops.release(fe);
2549 if (fe->ops.release)
2550 fe->ops.release(fe);
2551}
2552#endif
2553EXPORT_SYMBOL(dvb_frontend_detach);
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-11 03:07:02 -0400