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