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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / media / dvb-core / dvb_frontend.c
blob1f925e856974936914a7fdb5299bda2a4a84bd59
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 FESTATE_IDLE 1
70 #define FESTATE_RETUNE 2
71 #define FESTATE_TUNING_FAST 4
72 #define FESTATE_TUNING_SLOW 8
73 #define FESTATE_TUNED 16
74 #define FESTATE_ZIGZAG_FAST 32
75 #define FESTATE_ZIGZAG_SLOW 64
76 #define FESTATE_DISEQC 128
77 #define FESTATE_ERROR 256
78 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
79 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
80 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
81 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
82
83 #define FE_ALGO_HW 1
84 /*
85 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
86 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
87 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
88 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
89 * FESTATE_TUNED. The frontend has successfully locked on.
90 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
91 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
92 * FESTATE_DISEQC. A DISEQC command has just been issued.
93 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
94 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
95 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
96 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
97 */
98
99 #define DVB_FE_NO_EXIT 0
100 #define DVB_FE_NORMAL_EXIT 1
101 #define DVB_FE_DEVICE_REMOVED 2
102
103 static DEFINE_MUTEX(frontend_mutex);
104
105 struct dvb_frontend_private {
106
107 /* thread/frontend values */
108 struct dvb_device *dvbdev;
109 struct dvb_frontend_parameters parameters_out;
110 struct dvb_fe_events events;
111 struct semaphore sem;
112 struct list_head list_head;
113 wait_queue_head_t wait_queue;
114 struct task_struct *thread;
115 unsigned long release_jiffies;
116 unsigned int exit;
117 unsigned int wakeup;
118 fe_status_t status;
119 unsigned long tune_mode_flags;
120 unsigned int delay;
121 unsigned int reinitialise;
122 int tone;
123 int voltage;
124
125 /* swzigzag values */
126 unsigned int state;
127 unsigned int bending;
128 int lnb_drift;
129 unsigned int inversion;
130 unsigned int auto_step;
131 unsigned int auto_sub_step;
132 unsigned int started_auto_step;
133 unsigned int min_delay;
134 unsigned int max_drift;
135 unsigned int step_size;
136 int quality;
137 unsigned int check_wrapped;
138 enum dvbfe_search algo_status;
139 };
140
141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
142 static int dtv_get_frontend(struct dvb_frontend *fe,
143 struct dvb_frontend_parameters *p_out);
144 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
145 struct dvb_frontend_parameters *p);
146
147 static bool has_get_frontend(struct dvb_frontend *fe)
148 {
149 return fe->ops.get_frontend != NULL;
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_DTMB:
181 return DVBV3_OFDM;
182 case SYS_ATSC:
183 case SYS_ATSCMH:
184 case SYS_DVBC_ANNEX_B:
185 return DVBV3_ATSC;
186 case SYS_UNDEFINED:
187 case SYS_ISDBC:
188 case SYS_DVBH:
189 case SYS_DAB:
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 dev_dbg(fe->dvb->device, "%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 dev_dbg(fe->dvb->device, "%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 dev_dbg(fe->dvb->device,
284 "%s: initialising adapter %i frontend %i (%s)...\n",
285 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
286
287 if (fe->ops.init)
288 fe->ops.init(fe);
289 if (fe->ops.tuner_ops.init) {
290 if (fe->ops.i2c_gate_ctrl)
291 fe->ops.i2c_gate_ctrl(fe, 1);
292 fe->ops.tuner_ops.init(fe);
293 if (fe->ops.i2c_gate_ctrl)
294 fe->ops.i2c_gate_ctrl(fe, 0);
295 }
296 }
297
298 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
299 {
300 struct dvb_frontend_private *fepriv = fe->frontend_priv;
301
302 fepriv->reinitialise = 1;
303 dvb_frontend_wakeup(fe);
304 }
305 EXPORT_SYMBOL(dvb_frontend_reinitialise);
306
307 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
308 {
309 int q2;
310 struct dvb_frontend *fe = fepriv->dvbdev->priv;
311
312 dev_dbg(fe->dvb->device, "%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 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
405 "auto_sub_step:%i started_auto_step:%i\n",
406 __func__, fepriv->lnb_drift, fepriv->inversion,
407 fepriv->auto_step, fepriv->auto_sub_step,
408 fepriv->started_auto_step);
409
410 /* set the frontend itself */
411 c->frequency += fepriv->lnb_drift;
412 if (autoinversion)
413 c->inversion = fepriv->inversion;
414 tmp = *c;
415 if (fe->ops.set_frontend)
416 fe_set_err = fe->ops.set_frontend(fe);
417 *c = tmp;
418 if (fe_set_err < 0) {
419 fepriv->state = FESTATE_ERROR;
420 return fe_set_err;
421 }
422
423 c->frequency = original_frequency;
424 c->inversion = original_inversion;
425
426 fepriv->auto_sub_step++;
427 return 0;
428 }
429
430 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
431 {
432 fe_status_t s = 0;
433 int retval = 0;
434 struct dvb_frontend_private *fepriv = fe->frontend_priv;
435 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
436
437 /* if we've got no parameters, just keep idling */
438 if (fepriv->state & FESTATE_IDLE) {
439 fepriv->delay = 3*HZ;
440 fepriv->quality = 0;
441 return;
442 }
443
444 /* in SCAN mode, we just set the frontend when asked and leave it alone */
445 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
446 if (fepriv->state & FESTATE_RETUNE) {
447 tmp = *c;
448 if (fe->ops.set_frontend)
449 retval = fe->ops.set_frontend(fe);
450 *c = tmp;
451 if (retval < 0)
452 fepriv->state = FESTATE_ERROR;
453 else
454 fepriv->state = FESTATE_TUNED;
455 }
456 fepriv->delay = 3*HZ;
457 fepriv->quality = 0;
458 return;
459 }
460
461 /* get the frontend status */
462 if (fepriv->state & FESTATE_RETUNE) {
463 s = 0;
464 } else {
465 if (fe->ops.read_status)
466 fe->ops.read_status(fe, &s);
467 if (s != fepriv->status) {
468 dvb_frontend_add_event(fe, s);
469 fepriv->status = s;
470 }
471 }
472
473 /* if we're not tuned, and we have a lock, move to the TUNED state */
474 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
475 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
476 fepriv->state = FESTATE_TUNED;
477
478 /* if we're tuned, then we have determined the correct inversion */
479 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
480 (c->inversion == INVERSION_AUTO)) {
481 c->inversion = fepriv->inversion;
482 }
483 return;
484 }
485
486 /* if we are tuned already, check we're still locked */
487 if (fepriv->state & FESTATE_TUNED) {
488 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
489
490 /* we're tuned, and the lock is still good... */
491 if (s & FE_HAS_LOCK) {
492 return;
493 } else { /* if we _WERE_ tuned, but now don't have a lock */
494 fepriv->state = FESTATE_ZIGZAG_FAST;
495 fepriv->started_auto_step = fepriv->auto_step;
496 fepriv->check_wrapped = 0;
497 }
498 }
499
500 /* don't actually do anything if we're in the LOSTLOCK state,
501 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
502 if ((fepriv->state & FESTATE_LOSTLOCK) &&
503 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
504 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
505 return;
506 }
507
508 /* don't do anything if we're in the DISEQC state, since this
509 * might be someone with a motorized dish controlled by DISEQC.
510 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
511 if (fepriv->state & FESTATE_DISEQC) {
512 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
513 return;
514 }
515
516 /* if we're in the RETUNE state, set everything up for a brand
517 * new scan, keeping the current inversion setting, as the next
518 * tune is _very_ likely to require the same */
519 if (fepriv->state & FESTATE_RETUNE) {
520 fepriv->lnb_drift = 0;
521 fepriv->auto_step = 0;
522 fepriv->auto_sub_step = 0;
523 fepriv->started_auto_step = 0;
524 fepriv->check_wrapped = 0;
525 }
526
527 /* fast zigzag. */
528 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
529 fepriv->delay = fepriv->min_delay;
530
531 /* perform a tune */
532 retval = dvb_frontend_swzigzag_autotune(fe,
533 fepriv->check_wrapped);
534 if (retval < 0) {
535 return;
536 } else if (retval) {
537 /* OK, if we've run out of trials at the fast speed.
538 * Drop back to slow for the _next_ attempt */
539 fepriv->state = FESTATE_SEARCHING_SLOW;
540 fepriv->started_auto_step = fepriv->auto_step;
541 return;
542 }
543 fepriv->check_wrapped = 1;
544
545 /* if we've just retuned, enter the ZIGZAG_FAST state.
546 * This ensures we cannot return from an
547 * FE_SET_FRONTEND ioctl before the first frontend tune
548 * occurs */
549 if (fepriv->state & FESTATE_RETUNE) {
550 fepriv->state = FESTATE_TUNING_FAST;
551 }
552 }
553
554 /* slow zigzag */
555 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
556 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
557
558 /* Note: don't bother checking for wrapping; we stay in this
559 * state until we get a lock */
560 dvb_frontend_swzigzag_autotune(fe, 0);
561 }
562 }
563
564 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
565 {
566 struct dvb_frontend_private *fepriv = fe->frontend_priv;
567
568 if (fepriv->exit != DVB_FE_NO_EXIT)
569 return 1;
570
571 if (fepriv->dvbdev->writers == 1)
572 if (time_after_eq(jiffies, fepriv->release_jiffies +
573 dvb_shutdown_timeout * HZ))
574 return 1;
575
576 return 0;
577 }
578
579 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
580 {
581 struct dvb_frontend_private *fepriv = fe->frontend_priv;
582
583 if (fepriv->wakeup) {
584 fepriv->wakeup = 0;
585 return 1;
586 }
587 return dvb_frontend_is_exiting(fe);
588 }
589
590 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
591 {
592 struct dvb_frontend_private *fepriv = fe->frontend_priv;
593
594 fepriv->wakeup = 1;
595 wake_up_interruptible(&fepriv->wait_queue);
596 }
597
598 static int dvb_frontend_thread(void *data)
599 {
600 struct dvb_frontend *fe = data;
601 struct dvb_frontend_private *fepriv = fe->frontend_priv;
602 fe_status_t s;
603 enum dvbfe_algo algo;
604
605 bool re_tune = false;
606 bool semheld = false;
607
608 dev_dbg(fe->dvb->device, "%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... */
622 restart:
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 if (!down_interruptible(&fepriv->sem))
631 semheld = true;
632 fepriv->exit = DVB_FE_NORMAL_EXIT;
633 break;
634 }
635
636 if (try_to_freeze())
637 goto restart;
638
639 if (down_interruptible(&fepriv->sem))
640 break;
641
642 if (fepriv->reinitialise) {
643 dvb_frontend_init(fe);
644 if (fe->ops.set_tone && fepriv->tone != -1)
645 fe->ops.set_tone(fe, fepriv->tone);
646 if (fe->ops.set_voltage && fepriv->voltage != -1)
647 fe->ops.set_voltage(fe, fepriv->voltage);
648 fepriv->reinitialise = 0;
649 }
650
651 /* do an iteration of the tuning loop */
652 if (fe->ops.get_frontend_algo) {
653 algo = fe->ops.get_frontend_algo(fe);
654 switch (algo) {
655 case DVBFE_ALGO_HW:
656 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
657
658 if (fepriv->state & FESTATE_RETUNE) {
659 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
660 re_tune = true;
661 fepriv->state = FESTATE_TUNED;
662 } else {
663 re_tune = false;
664 }
665
666 if (fe->ops.tune)
667 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
668
669 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
670 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
671 dvb_frontend_add_event(fe, s);
672 fepriv->status = s;
673 }
674 break;
675 case DVBFE_ALGO_SW:
676 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
677 dvb_frontend_swzigzag(fe);
678 break;
679 case DVBFE_ALGO_CUSTOM:
680 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
681 if (fepriv->state & FESTATE_RETUNE) {
682 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
683 fepriv->state = FESTATE_TUNED;
684 }
685 /* Case where we are going to search for a carrier
686 * User asked us to retune again for some reason, possibly
687 * requesting a search with a new set of parameters
688 */
689 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
690 if (fe->ops.search) {
691 fepriv->algo_status = fe->ops.search(fe);
692 /* We did do a search as was requested, the flags are
693 * now unset as well and has the flags wrt to search.
694 */
695 } else {
696 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
697 }
698 }
699 /* Track the carrier if the search was successful */
700 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
701 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
702 fepriv->delay = HZ / 2;
703 }
704 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
705 fe->ops.read_status(fe, &s);
706 if (s != fepriv->status) {
707 dvb_frontend_add_event(fe, s); /* update event list */
708 fepriv->status = s;
709 if (!(s & FE_HAS_LOCK)) {
710 fepriv->delay = HZ / 10;
711 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
712 } else {
713 fepriv->delay = 60 * HZ;
714 }
715 }
716 break;
717 default:
718 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
719 break;
720 }
721 } else {
722 dvb_frontend_swzigzag(fe);
723 }
724 }
725
726 if (dvb_powerdown_on_sleep) {
727 if (fe->ops.set_voltage)
728 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
729 if (fe->ops.tuner_ops.sleep) {
730 if (fe->ops.i2c_gate_ctrl)
731 fe->ops.i2c_gate_ctrl(fe, 1);
732 fe->ops.tuner_ops.sleep(fe);
733 if (fe->ops.i2c_gate_ctrl)
734 fe->ops.i2c_gate_ctrl(fe, 0);
735 }
736 if (fe->ops.sleep)
737 fe->ops.sleep(fe);
738 }
739
740 fepriv->thread = NULL;
741 if (kthread_should_stop())
742 fepriv->exit = DVB_FE_DEVICE_REMOVED;
743 else
744 fepriv->exit = DVB_FE_NO_EXIT;
745 mb();
746
747 if (semheld)
748 up(&fepriv->sem);
749 dvb_frontend_wakeup(fe);
750 return 0;
751 }
752
753 static void dvb_frontend_stop(struct dvb_frontend *fe)
754 {
755 struct dvb_frontend_private *fepriv = fe->frontend_priv;
756
757 dev_dbg(fe->dvb->device, "%s:\n", __func__);
758
759 fepriv->exit = DVB_FE_NORMAL_EXIT;
760 mb();
761
762 if (!fepriv->thread)
763 return;
764
765 kthread_stop(fepriv->thread);
766
767 sema_init(&fepriv->sem, 1);
768 fepriv->state = FESTATE_IDLE;
769
770 /* paranoia check in case a signal arrived */
771 if (fepriv->thread)
772 dev_warn(fe->dvb->device,
773 "dvb_frontend_stop: warning: thread %p won't exit\n",
774 fepriv->thread);
775 }
776
777 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
778 {
779 return ((curtime.tv_usec < lasttime.tv_usec) ?
780 1000000 - lasttime.tv_usec + curtime.tv_usec :
781 curtime.tv_usec - lasttime.tv_usec);
782 }
783 EXPORT_SYMBOL(timeval_usec_diff);
784
785 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
786 {
787 curtime->tv_usec += add_usec;
788 if (curtime->tv_usec >= 1000000) {
789 curtime->tv_usec -= 1000000;
790 curtime->tv_sec++;
791 }
792 }
793
794 /*
795 * Sleep until gettimeofday() > waketime + add_usec
796 * This needs to be as precise as possible, but as the delay is
797 * usually between 2ms and 32ms, it is done using a scheduled msleep
798 * followed by usleep (normally a busy-wait loop) for the remainder
799 */
800 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
801 {
802 struct timeval lasttime;
803 s32 delta, newdelta;
804
805 timeval_usec_add(waketime, add_usec);
806
807 do_gettimeofday(&lasttime);
808 delta = timeval_usec_diff(lasttime, *waketime);
809 if (delta > 2500) {
810 msleep((delta - 1500) / 1000);
811 do_gettimeofday(&lasttime);
812 newdelta = timeval_usec_diff(lasttime, *waketime);
813 delta = (newdelta > delta) ? 0 : newdelta;
814 }
815 if (delta > 0)
816 udelay(delta);
817 }
818 EXPORT_SYMBOL(dvb_frontend_sleep_until);
819
820 static int dvb_frontend_start(struct dvb_frontend *fe)
821 {
822 int ret;
823 struct dvb_frontend_private *fepriv = fe->frontend_priv;
824 struct task_struct *fe_thread;
825
826 dev_dbg(fe->dvb->device, "%s:\n", __func__);
827
828 if (fepriv->thread) {
829 if (fepriv->exit == DVB_FE_NO_EXIT)
830 return 0;
831 else
832 dvb_frontend_stop (fe);
833 }
834
835 if (signal_pending(current))
836 return -EINTR;
837 if (down_interruptible (&fepriv->sem))
838 return -EINTR;
839
840 fepriv->state = FESTATE_IDLE;
841 fepriv->exit = DVB_FE_NO_EXIT;
842 fepriv->thread = NULL;
843 mb();
844
845 fe_thread = kthread_run(dvb_frontend_thread, fe,
846 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
847 if (IS_ERR(fe_thread)) {
848 ret = PTR_ERR(fe_thread);
849 dev_warn(fe->dvb->device,
850 "dvb_frontend_start: failed to start kthread (%d)\n",
851 ret);
852 up(&fepriv->sem);
853 return ret;
854 }
855 fepriv->thread = fe_thread;
856 return 0;
857 }
858
859 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
860 u32 *freq_min, u32 *freq_max)
861 {
862 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
863
864 if (fe->ops.info.frequency_max == 0)
865 *freq_max = fe->ops.tuner_ops.info.frequency_max;
866 else if (fe->ops.tuner_ops.info.frequency_max == 0)
867 *freq_max = fe->ops.info.frequency_max;
868 else
869 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
870
871 if (*freq_min == 0 || *freq_max == 0)
872 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
873 fe->dvb->num, fe->id);
874 }
875
876 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
877 {
878 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
879 u32 freq_min;
880 u32 freq_max;
881
882 /* range check: frequency */
883 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
884 if ((freq_min && c->frequency < freq_min) ||
885 (freq_max && c->frequency > freq_max)) {
886 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
887 fe->dvb->num, fe->id, c->frequency,
888 freq_min, freq_max);
889 return -EINVAL;
890 }
891
892 /* range check: symbol rate */
893 switch (c->delivery_system) {
894 case SYS_DVBS:
895 case SYS_DVBS2:
896 case SYS_TURBO:
897 case SYS_DVBC_ANNEX_A:
898 case SYS_DVBC_ANNEX_C:
899 if ((fe->ops.info.symbol_rate_min &&
900 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
901 (fe->ops.info.symbol_rate_max &&
902 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
903 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
904 fe->dvb->num, fe->id, c->symbol_rate,
905 fe->ops.info.symbol_rate_min,
906 fe->ops.info.symbol_rate_max);
907 return -EINVAL;
908 }
909 default:
910 break;
911 }
912
913 return 0;
914 }
915
916 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
917 {
918 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
919 int i;
920 u32 delsys;
921
922 delsys = c->delivery_system;
923 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
924 c->delivery_system = delsys;
925
926 c->state = DTV_CLEAR;
927
928 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
929 __func__, c->delivery_system);
930
931 c->transmission_mode = TRANSMISSION_MODE_AUTO;
932 c->bandwidth_hz = 0; /* AUTO */
933 c->guard_interval = GUARD_INTERVAL_AUTO;
934 c->hierarchy = HIERARCHY_AUTO;
935 c->symbol_rate = 0;
936 c->code_rate_HP = FEC_AUTO;
937 c->code_rate_LP = FEC_AUTO;
938 c->fec_inner = FEC_AUTO;
939 c->rolloff = ROLLOFF_AUTO;
940 c->voltage = SEC_VOLTAGE_OFF;
941 c->sectone = SEC_TONE_OFF;
942 c->pilot = PILOT_AUTO;
943
944 c->isdbt_partial_reception = 0;
945 c->isdbt_sb_mode = 0;
946 c->isdbt_sb_subchannel = 0;
947 c->isdbt_sb_segment_idx = 0;
948 c->isdbt_sb_segment_count = 0;
949 c->isdbt_layer_enabled = 0;
950 for (i = 0; i < 3; i++) {
951 c->layer[i].fec = FEC_AUTO;
952 c->layer[i].modulation = QAM_AUTO;
953 c->layer[i].interleaving = 0;
954 c->layer[i].segment_count = 0;
955 }
956
957 c->stream_id = NO_STREAM_ID_FILTER;
958
959 switch (c->delivery_system) {
960 case SYS_DVBS:
961 case SYS_DVBS2:
962 case SYS_TURBO:
963 c->modulation = QPSK; /* implied for DVB-S in legacy API */
964 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
965 break;
966 case SYS_ATSC:
967 c->modulation = VSB_8;
968 break;
969 default:
970 c->modulation = QAM_AUTO;
971 break;
972 }
973
974 c->lna = LNA_AUTO;
975
976 return 0;
977 }
978
979 #define _DTV_CMD(n, s, b) \
980 [n] = { \
981 .name = #n, \
982 .cmd = n, \
983 .set = s,\
984 .buffer = b \
985 }
986
987 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
988 _DTV_CMD(DTV_TUNE, 1, 0),
989 _DTV_CMD(DTV_CLEAR, 1, 0),
990
991 /* Set */
992 _DTV_CMD(DTV_FREQUENCY, 1, 0),
993 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
994 _DTV_CMD(DTV_MODULATION, 1, 0),
995 _DTV_CMD(DTV_INVERSION, 1, 0),
996 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
997 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
998 _DTV_CMD(DTV_INNER_FEC, 1, 0),
999 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1000 _DTV_CMD(DTV_TONE, 1, 0),
1001 _DTV_CMD(DTV_PILOT, 1, 0),
1002 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1003 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1004 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1005 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1006 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1007 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1008 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1009 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1010
1011 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1012 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1013 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1014 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1015 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1016 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1017 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1018 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1019 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1020 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1021 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1022 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1023 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1024 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1025 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1026 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1027 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1028 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1029
1030 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1031 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1032 _DTV_CMD(DTV_LNA, 1, 0),
1033
1034 /* Get */
1035 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1036 _DTV_CMD(DTV_API_VERSION, 0, 0),
1037
1038 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1039
1040 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1041 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1042
1043 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1044 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1045 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1046 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1047 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1048 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1049 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1050 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1051 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1052 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1053 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1054 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1055 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1056
1057 /* Statistics API */
1058 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1059 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1060 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1061 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1062 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1063 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1064 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1065 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1066 };
1067
1068 static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp)
1069 {
1070 int i;
1071
1072 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1073 dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n",
1074 __func__, tvp->cmd);
1075 return;
1076 }
1077
1078 dev_dbg(fe->dvb->device, "%s: tvp.cmd = 0x%08x (%s)\n", __func__,
1079 tvp->cmd, dtv_cmds[tvp->cmd].name);
1080
1081 if (dtv_cmds[tvp->cmd].buffer) {
1082 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1083 __func__, tvp->u.buffer.len);
1084
1085 for(i = 0; i < tvp->u.buffer.len; i++)
1086 dev_dbg(fe->dvb->device,
1087 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1088 __func__, i, tvp->u.buffer.data[i]);
1089 } else {
1090 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1091 tvp->u.data);
1092 }
1093 }
1094
1095 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1096 * drivers can use a single set_frontend tuning function, regardless of whether
1097 * it's being used for the legacy or new API, reducing code and complexity.
1098 */
1099 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1100 struct dtv_frontend_properties *c,
1101 const struct dvb_frontend_parameters *p)
1102 {
1103 c->frequency = p->frequency;
1104 c->inversion = p->inversion;
1105
1106 switch (dvbv3_type(c->delivery_system)) {
1107 case DVBV3_QPSK:
1108 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1109 c->symbol_rate = p->u.qpsk.symbol_rate;
1110 c->fec_inner = p->u.qpsk.fec_inner;
1111 break;
1112 case DVBV3_QAM:
1113 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1114 c->symbol_rate = p->u.qam.symbol_rate;
1115 c->fec_inner = p->u.qam.fec_inner;
1116 c->modulation = p->u.qam.modulation;
1117 break;
1118 case DVBV3_OFDM:
1119 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1120
1121 switch (p->u.ofdm.bandwidth) {
1122 case BANDWIDTH_10_MHZ:
1123 c->bandwidth_hz = 10000000;
1124 break;
1125 case BANDWIDTH_8_MHZ:
1126 c->bandwidth_hz = 8000000;
1127 break;
1128 case BANDWIDTH_7_MHZ:
1129 c->bandwidth_hz = 7000000;
1130 break;
1131 case BANDWIDTH_6_MHZ:
1132 c->bandwidth_hz = 6000000;
1133 break;
1134 case BANDWIDTH_5_MHZ:
1135 c->bandwidth_hz = 5000000;
1136 break;
1137 case BANDWIDTH_1_712_MHZ:
1138 c->bandwidth_hz = 1712000;
1139 break;
1140 case BANDWIDTH_AUTO:
1141 c->bandwidth_hz = 0;
1142 }
1143
1144 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1145 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1146 c->modulation = p->u.ofdm.constellation;
1147 c->transmission_mode = p->u.ofdm.transmission_mode;
1148 c->guard_interval = p->u.ofdm.guard_interval;
1149 c->hierarchy = p->u.ofdm.hierarchy_information;
1150 break;
1151 case DVBV3_ATSC:
1152 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1153 c->modulation = p->u.vsb.modulation;
1154 if (c->delivery_system == SYS_ATSCMH)
1155 break;
1156 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1157 c->delivery_system = SYS_ATSC;
1158 else
1159 c->delivery_system = SYS_DVBC_ANNEX_B;
1160 break;
1161 case DVBV3_UNKNOWN:
1162 dev_err(fe->dvb->device,
1163 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1164 __func__, c->delivery_system);
1165 return -EINVAL;
1166 }
1167
1168 return 0;
1169 }
1170
1171 /* Ensure the cached values are set correctly in the frontend
1172 * legacy tuning structures, for the advanced tuning API.
1173 */
1174 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1175 struct dvb_frontend_parameters *p)
1176 {
1177 const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1178
1179 p->frequency = c->frequency;
1180 p->inversion = c->inversion;
1181
1182 switch (dvbv3_type(c->delivery_system)) {
1183 case DVBV3_UNKNOWN:
1184 dev_err(fe->dvb->device,
1185 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1186 __func__, c->delivery_system);
1187 return -EINVAL;
1188 case DVBV3_QPSK:
1189 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1190 p->u.qpsk.symbol_rate = c->symbol_rate;
1191 p->u.qpsk.fec_inner = c->fec_inner;
1192 break;
1193 case DVBV3_QAM:
1194 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1195 p->u.qam.symbol_rate = c->symbol_rate;
1196 p->u.qam.fec_inner = c->fec_inner;
1197 p->u.qam.modulation = c->modulation;
1198 break;
1199 case DVBV3_OFDM:
1200 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1201 switch (c->bandwidth_hz) {
1202 case 10000000:
1203 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1204 break;
1205 case 8000000:
1206 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1207 break;
1208 case 7000000:
1209 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1210 break;
1211 case 6000000:
1212 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1213 break;
1214 case 5000000:
1215 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1216 break;
1217 case 1712000:
1218 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1219 break;
1220 case 0:
1221 default:
1222 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1223 }
1224 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1225 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1226 p->u.ofdm.constellation = c->modulation;
1227 p->u.ofdm.transmission_mode = c->transmission_mode;
1228 p->u.ofdm.guard_interval = c->guard_interval;
1229 p->u.ofdm.hierarchy_information = c->hierarchy;
1230 break;
1231 case DVBV3_ATSC:
1232 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1233 p->u.vsb.modulation = c->modulation;
1234 break;
1235 }
1236 return 0;
1237 }
1238
1239 /**
1240 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1241 * @fe: struct dvb_frontend pointer
1242 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1243 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1244 *
1245 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1246 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1247 * If p_out is not null, it will update the DVBv3 params pointed by it.
1248 */
1249 static int dtv_get_frontend(struct dvb_frontend *fe,
1250 struct dvb_frontend_parameters *p_out)
1251 {
1252 int r;
1253
1254 if (fe->ops.get_frontend) {
1255 r = fe->ops.get_frontend(fe);
1256 if (unlikely(r < 0))
1257 return r;
1258 if (p_out)
1259 dtv_property_legacy_params_sync(fe, p_out);
1260 return 0;
1261 }
1262
1263 /* As everything is in cache, get_frontend fops are always supported */
1264 return 0;
1265 }
1266
1267 static int dvb_frontend_ioctl_legacy(struct file *file,
1268 unsigned int cmd, void *parg);
1269 static int dvb_frontend_ioctl_properties(struct file *file,
1270 unsigned int cmd, void *parg);
1271
1272 static int dtv_property_process_get(struct dvb_frontend *fe,
1273 const struct dtv_frontend_properties *c,
1274 struct dtv_property *tvp,
1275 struct file *file)
1276 {
1277 int r, ncaps;
1278
1279 switch(tvp->cmd) {
1280 case DTV_ENUM_DELSYS:
1281 ncaps = 0;
1282 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1283 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1284 ncaps++;
1285 }
1286 tvp->u.buffer.len = ncaps;
1287 break;
1288 case DTV_FREQUENCY:
1289 tvp->u.data = c->frequency;
1290 break;
1291 case DTV_MODULATION:
1292 tvp->u.data = c->modulation;
1293 break;
1294 case DTV_BANDWIDTH_HZ:
1295 tvp->u.data = c->bandwidth_hz;
1296 break;
1297 case DTV_INVERSION:
1298 tvp->u.data = c->inversion;
1299 break;
1300 case DTV_SYMBOL_RATE:
1301 tvp->u.data = c->symbol_rate;
1302 break;
1303 case DTV_INNER_FEC:
1304 tvp->u.data = c->fec_inner;
1305 break;
1306 case DTV_PILOT:
1307 tvp->u.data = c->pilot;
1308 break;
1309 case DTV_ROLLOFF:
1310 tvp->u.data = c->rolloff;
1311 break;
1312 case DTV_DELIVERY_SYSTEM:
1313 tvp->u.data = c->delivery_system;
1314 break;
1315 case DTV_VOLTAGE:
1316 tvp->u.data = c->voltage;
1317 break;
1318 case DTV_TONE:
1319 tvp->u.data = c->sectone;
1320 break;
1321 case DTV_API_VERSION:
1322 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1323 break;
1324 case DTV_CODE_RATE_HP:
1325 tvp->u.data = c->code_rate_HP;
1326 break;
1327 case DTV_CODE_RATE_LP:
1328 tvp->u.data = c->code_rate_LP;
1329 break;
1330 case DTV_GUARD_INTERVAL:
1331 tvp->u.data = c->guard_interval;
1332 break;
1333 case DTV_TRANSMISSION_MODE:
1334 tvp->u.data = c->transmission_mode;
1335 break;
1336 case DTV_HIERARCHY:
1337 tvp->u.data = c->hierarchy;
1338 break;
1339 case DTV_INTERLEAVING:
1340 tvp->u.data = c->interleaving;
1341 break;
1342
1343 /* ISDB-T Support here */
1344 case DTV_ISDBT_PARTIAL_RECEPTION:
1345 tvp->u.data = c->isdbt_partial_reception;
1346 break;
1347 case DTV_ISDBT_SOUND_BROADCASTING:
1348 tvp->u.data = c->isdbt_sb_mode;
1349 break;
1350 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1351 tvp->u.data = c->isdbt_sb_subchannel;
1352 break;
1353 case DTV_ISDBT_SB_SEGMENT_IDX:
1354 tvp->u.data = c->isdbt_sb_segment_idx;
1355 break;
1356 case DTV_ISDBT_SB_SEGMENT_COUNT:
1357 tvp->u.data = c->isdbt_sb_segment_count;
1358 break;
1359 case DTV_ISDBT_LAYER_ENABLED:
1360 tvp->u.data = c->isdbt_layer_enabled;
1361 break;
1362 case DTV_ISDBT_LAYERA_FEC:
1363 tvp->u.data = c->layer[0].fec;
1364 break;
1365 case DTV_ISDBT_LAYERA_MODULATION:
1366 tvp->u.data = c->layer[0].modulation;
1367 break;
1368 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1369 tvp->u.data = c->layer[0].segment_count;
1370 break;
1371 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1372 tvp->u.data = c->layer[0].interleaving;
1373 break;
1374 case DTV_ISDBT_LAYERB_FEC:
1375 tvp->u.data = c->layer[1].fec;
1376 break;
1377 case DTV_ISDBT_LAYERB_MODULATION:
1378 tvp->u.data = c->layer[1].modulation;
1379 break;
1380 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1381 tvp->u.data = c->layer[1].segment_count;
1382 break;
1383 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1384 tvp->u.data = c->layer[1].interleaving;
1385 break;
1386 case DTV_ISDBT_LAYERC_FEC:
1387 tvp->u.data = c->layer[2].fec;
1388 break;
1389 case DTV_ISDBT_LAYERC_MODULATION:
1390 tvp->u.data = c->layer[2].modulation;
1391 break;
1392 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1393 tvp->u.data = c->layer[2].segment_count;
1394 break;
1395 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1396 tvp->u.data = c->layer[2].interleaving;
1397 break;
1398
1399 /* Multistream support */
1400 case DTV_STREAM_ID:
1401 case DTV_DVBT2_PLP_ID_LEGACY:
1402 tvp->u.data = c->stream_id;
1403 break;
1404
1405 /* ATSC-MH */
1406 case DTV_ATSCMH_FIC_VER:
1407 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1408 break;
1409 case DTV_ATSCMH_PARADE_ID:
1410 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1411 break;
1412 case DTV_ATSCMH_NOG:
1413 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1414 break;
1415 case DTV_ATSCMH_TNOG:
1416 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1417 break;
1418 case DTV_ATSCMH_SGN:
1419 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1420 break;
1421 case DTV_ATSCMH_PRC:
1422 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1423 break;
1424 case DTV_ATSCMH_RS_FRAME_MODE:
1425 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1426 break;
1427 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1428 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1429 break;
1430 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1431 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1432 break;
1433 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1434 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1435 break;
1436 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1437 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1438 break;
1439 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1440 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1441 break;
1442 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1443 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1444 break;
1445 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1446 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1447 break;
1448 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1449 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1450 break;
1451
1452 case DTV_LNA:
1453 tvp->u.data = c->lna;
1454 break;
1455
1456 /* Fill quality measures */
1457 case DTV_STAT_SIGNAL_STRENGTH:
1458 tvp->u.st = c->strength;
1459 break;
1460 case DTV_STAT_CNR:
1461 tvp->u.st = c->cnr;
1462 break;
1463 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1464 tvp->u.st = c->pre_bit_error;
1465 break;
1466 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1467 tvp->u.st = c->pre_bit_count;
1468 break;
1469 case DTV_STAT_POST_ERROR_BIT_COUNT:
1470 tvp->u.st = c->post_bit_error;
1471 break;
1472 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1473 tvp->u.st = c->post_bit_count;
1474 break;
1475 case DTV_STAT_ERROR_BLOCK_COUNT:
1476 tvp->u.st = c->block_error;
1477 break;
1478 case DTV_STAT_TOTAL_BLOCK_COUNT:
1479 tvp->u.st = c->block_count;
1480 break;
1481 default:
1482 dev_dbg(fe->dvb->device,
1483 "%s: FE property %d doesn't exist\n",
1484 __func__, tvp->cmd);
1485 return -EINVAL;
1486 }
1487
1488 /* Allow the frontend to override outgoing properties */
1489 if (fe->ops.get_property) {
1490 r = fe->ops.get_property(fe, tvp);
1491 if (r < 0)
1492 return r;
1493 }
1494
1495 dtv_property_dump(fe, tvp);
1496
1497 return 0;
1498 }
1499
1500 static int dtv_set_frontend(struct dvb_frontend *fe);
1501
1502 static bool is_dvbv3_delsys(u32 delsys)
1503 {
1504 bool status;
1505
1506 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1507 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1508
1509 return status;
1510 }
1511
1512 /**
1513 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1514 * @fe: struct frontend;
1515 * @delsys: DVBv5 type that will be used for emulation
1516 *
1517 * Provides emulation for delivery systems that are compatible with the old
1518 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1519 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1520 * parameters are compatible with DVB-S spec.
1521 */
1522 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1523 {
1524 int i;
1525 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1526
1527 c->delivery_system = delsys;
1528
1529 /*
1530 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1531 */
1532 if (c->delivery_system == SYS_ISDBT) {
1533 dev_dbg(fe->dvb->device,
1534 "%s: Using defaults for SYS_ISDBT\n",
1535 __func__);
1536
1537 if (!c->bandwidth_hz)
1538 c->bandwidth_hz = 6000000;
1539
1540 c->isdbt_partial_reception = 0;
1541 c->isdbt_sb_mode = 0;
1542 c->isdbt_sb_subchannel = 0;
1543 c->isdbt_sb_segment_idx = 0;
1544 c->isdbt_sb_segment_count = 0;
1545 c->isdbt_layer_enabled = 7;
1546 for (i = 0; i < 3; i++) {
1547 c->layer[i].fec = FEC_AUTO;
1548 c->layer[i].modulation = QAM_AUTO;
1549 c->layer[i].interleaving = 0;
1550 c->layer[i].segment_count = 0;
1551 }
1552 }
1553 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1554 __func__, c->delivery_system);
1555
1556 return 0;
1557 }
1558
1559 /**
1560 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1561 * @fe: frontend struct
1562 * @desired_system: delivery system requested by the user
1563 *
1564 * A DVBv5 call know what's the desired system it wants. So, set it.
1565 *
1566 * There are, however, a few known issues with early DVBv5 applications that
1567 * are also handled by this logic:
1568 *
1569 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1570 * This is an API violation, but, as we don't want to break userspace,
1571 * convert it to the first supported delivery system.
1572 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1573 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1574 * ISDB-T provided backward compat with DVB-T.
1575 */
1576 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1577 u32 desired_system)
1578 {
1579 int ncaps;
1580 u32 delsys = SYS_UNDEFINED;
1581 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1582 enum dvbv3_emulation_type type;
1583
1584 /*
1585 * It was reported that some old DVBv5 applications were
1586 * filling delivery_system with SYS_UNDEFINED. If this happens,
1587 * assume that the application wants to use the first supported
1588 * delivery system.
1589 */
1590 if (desired_system == SYS_UNDEFINED)
1591 desired_system = fe->ops.delsys[0];
1592
1593 /*
1594 * This is a DVBv5 call. So, it likely knows the supported
1595 * delivery systems. So, check if the desired delivery system is
1596 * supported
1597 */
1598 ncaps = 0;
1599 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1600 if (fe->ops.delsys[ncaps] == desired_system) {
1601 c->delivery_system = desired_system;
1602 dev_dbg(fe->dvb->device,
1603 "%s: Changing delivery system to %d\n",
1604 __func__, desired_system);
1605 return 0;
1606 }
1607 ncaps++;
1608 }
1609
1610 /*
1611 * The requested delivery system isn't supported. Maybe userspace
1612 * is requesting a DVBv3 compatible delivery system.
1613 *
1614 * The emulation only works if the desired system is one of the
1615 * delivery systems supported by DVBv3 API
1616 */
1617 if (!is_dvbv3_delsys(desired_system)) {
1618 dev_dbg(fe->dvb->device,
1619 "%s: Delivery system %d not supported.\n",
1620 __func__, desired_system);
1621 return -EINVAL;
1622 }
1623
1624 type = dvbv3_type(desired_system);
1625
1626 /*
1627 * Get the last non-DVBv3 delivery system that has the same type
1628 * of the desired system
1629 */
1630 ncaps = 0;
1631 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1632 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1633 delsys = fe->ops.delsys[ncaps];
1634 ncaps++;
1635 }
1636
1637 /* There's nothing compatible with the desired delivery system */
1638 if (delsys == SYS_UNDEFINED) {
1639 dev_dbg(fe->dvb->device,
1640 "%s: Delivery system %d not supported on emulation mode.\n",
1641 __func__, desired_system);
1642 return -EINVAL;
1643 }
1644
1645 dev_dbg(fe->dvb->device,
1646 "%s: Using delivery system %d emulated as if it were %d\n",
1647 __func__, delsys, desired_system);
1648
1649 return emulate_delivery_system(fe, desired_system);
1650 }
1651
1652 /**
1653 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1654 * @fe: frontend struct
1655 *
1656 * A DVBv3 call doesn't know what's the desired system it wants. It also
1657 * doesn't allow to switch between different types. Due to that, userspace
1658 * should use DVBv5 instead.
1659 * However, in order to avoid breaking userspace API, limited backward
1660 * compatibility support is provided.
1661 *
1662 * There are some delivery systems that are incompatible with DVBv3 calls.
1663 *
1664 * This routine should work fine for frontends that support just one delivery
1665 * system.
1666 *
1667 * For frontends that support multiple frontends:
1668 * 1) It defaults to use the first supported delivery system. There's an
1669 * userspace application that allows changing it at runtime;
1670 *
1671 * 2) If the current delivery system is not compatible with DVBv3, it gets
1672 * the first one that it is compatible.
1673 *
1674 * NOTE: in order for this to work with applications like Kaffeine that
1675 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1676 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1677 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1678 * to DVB-S.
1679 */
1680 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1681 {
1682 int ncaps;
1683 u32 delsys = SYS_UNDEFINED;
1684 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1685
1686 /* If not set yet, defaults to the first supported delivery system */
1687 if (c->delivery_system == SYS_UNDEFINED)
1688 c->delivery_system = fe->ops.delsys[0];
1689
1690 /*
1691 * Trivial case: just use the current one, if it already a DVBv3
1692 * delivery system
1693 */
1694 if (is_dvbv3_delsys(c->delivery_system)) {
1695 dev_dbg(fe->dvb->device,
1696 "%s: Using delivery system to %d\n",
1697 __func__, c->delivery_system);
1698 return 0;
1699 }
1700
1701 /*
1702 * Seek for the first delivery system that it is compatible with a
1703 * DVBv3 standard
1704 */
1705 ncaps = 0;
1706 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1707 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1708 delsys = fe->ops.delsys[ncaps];
1709 break;
1710 }
1711 ncaps++;
1712 }
1713 if (delsys == SYS_UNDEFINED) {
1714 dev_dbg(fe->dvb->device,
1715 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1716 __func__);
1717 return -EINVAL;
1718 }
1719 return emulate_delivery_system(fe, delsys);
1720 }
1721
1722 static int dtv_property_process_set(struct dvb_frontend *fe,
1723 struct dtv_property *tvp,
1724 struct file *file)
1725 {
1726 int r = 0;
1727 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1728
1729 /* Allow the frontend to validate incoming properties */
1730 if (fe->ops.set_property) {
1731 r = fe->ops.set_property(fe, tvp);
1732 if (r < 0)
1733 return r;
1734 }
1735
1736 switch(tvp->cmd) {
1737 case DTV_CLEAR:
1738 /*
1739 * Reset a cache of data specific to the frontend here. This does
1740 * not effect hardware.
1741 */
1742 dvb_frontend_clear_cache(fe);
1743 break;
1744 case DTV_TUNE:
1745 /* interpret the cache of data, build either a traditional frontend
1746 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1747 * ioctl.
1748 */
1749 c->state = tvp->cmd;
1750 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1751 __func__);
1752
1753 r = dtv_set_frontend(fe);
1754 break;
1755 case DTV_FREQUENCY:
1756 c->frequency = tvp->u.data;
1757 break;
1758 case DTV_MODULATION:
1759 c->modulation = tvp->u.data;
1760 break;
1761 case DTV_BANDWIDTH_HZ:
1762 c->bandwidth_hz = tvp->u.data;
1763 break;
1764 case DTV_INVERSION:
1765 c->inversion = tvp->u.data;
1766 break;
1767 case DTV_SYMBOL_RATE:
1768 c->symbol_rate = tvp->u.data;
1769 break;
1770 case DTV_INNER_FEC:
1771 c->fec_inner = tvp->u.data;
1772 break;
1773 case DTV_PILOT:
1774 c->pilot = tvp->u.data;
1775 break;
1776 case DTV_ROLLOFF:
1777 c->rolloff = tvp->u.data;
1778 break;
1779 case DTV_DELIVERY_SYSTEM:
1780 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1781 break;
1782 case DTV_VOLTAGE:
1783 c->voltage = tvp->u.data;
1784 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1785 (void *)c->voltage);
1786 break;
1787 case DTV_TONE:
1788 c->sectone = tvp->u.data;
1789 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1790 (void *)c->sectone);
1791 break;
1792 case DTV_CODE_RATE_HP:
1793 c->code_rate_HP = tvp->u.data;
1794 break;
1795 case DTV_CODE_RATE_LP:
1796 c->code_rate_LP = tvp->u.data;
1797 break;
1798 case DTV_GUARD_INTERVAL:
1799 c->guard_interval = tvp->u.data;
1800 break;
1801 case DTV_TRANSMISSION_MODE:
1802 c->transmission_mode = tvp->u.data;
1803 break;
1804 case DTV_HIERARCHY:
1805 c->hierarchy = tvp->u.data;
1806 break;
1807 case DTV_INTERLEAVING:
1808 c->interleaving = tvp->u.data;
1809 break;
1810
1811 /* ISDB-T Support here */
1812 case DTV_ISDBT_PARTIAL_RECEPTION:
1813 c->isdbt_partial_reception = tvp->u.data;
1814 break;
1815 case DTV_ISDBT_SOUND_BROADCASTING:
1816 c->isdbt_sb_mode = tvp->u.data;
1817 break;
1818 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1819 c->isdbt_sb_subchannel = tvp->u.data;
1820 break;
1821 case DTV_ISDBT_SB_SEGMENT_IDX:
1822 c->isdbt_sb_segment_idx = tvp->u.data;
1823 break;
1824 case DTV_ISDBT_SB_SEGMENT_COUNT:
1825 c->isdbt_sb_segment_count = tvp->u.data;
1826 break;
1827 case DTV_ISDBT_LAYER_ENABLED:
1828 c->isdbt_layer_enabled = tvp->u.data;
1829 break;
1830 case DTV_ISDBT_LAYERA_FEC:
1831 c->layer[0].fec = tvp->u.data;
1832 break;
1833 case DTV_ISDBT_LAYERA_MODULATION:
1834 c->layer[0].modulation = tvp->u.data;
1835 break;
1836 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1837 c->layer[0].segment_count = tvp->u.data;
1838 break;
1839 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1840 c->layer[0].interleaving = tvp->u.data;
1841 break;
1842 case DTV_ISDBT_LAYERB_FEC:
1843 c->layer[1].fec = tvp->u.data;
1844 break;
1845 case DTV_ISDBT_LAYERB_MODULATION:
1846 c->layer[1].modulation = tvp->u.data;
1847 break;
1848 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1849 c->layer[1].segment_count = tvp->u.data;
1850 break;
1851 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1852 c->layer[1].interleaving = tvp->u.data;
1853 break;
1854 case DTV_ISDBT_LAYERC_FEC:
1855 c->layer[2].fec = tvp->u.data;
1856 break;
1857 case DTV_ISDBT_LAYERC_MODULATION:
1858 c->layer[2].modulation = tvp->u.data;
1859 break;
1860 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1861 c->layer[2].segment_count = tvp->u.data;
1862 break;
1863 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1864 c->layer[2].interleaving = tvp->u.data;
1865 break;
1866
1867 /* Multistream support */
1868 case DTV_STREAM_ID:
1869 case DTV_DVBT2_PLP_ID_LEGACY:
1870 c->stream_id = tvp->u.data;
1871 break;
1872
1873 /* ATSC-MH */
1874 case DTV_ATSCMH_PARADE_ID:
1875 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1876 break;
1877 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1878 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1879 break;
1880
1881 case DTV_LNA:
1882 c->lna = tvp->u.data;
1883 if (fe->ops.set_lna)
1884 r = fe->ops.set_lna(fe);
1885 break;
1886
1887 default:
1888 return -EINVAL;
1889 }
1890
1891 return r;
1892 }
1893
1894 static int dvb_frontend_ioctl(struct file *file,
1895 unsigned int cmd, void *parg)
1896 {
1897 struct dvb_device *dvbdev = file->private_data;
1898 struct dvb_frontend *fe = dvbdev->priv;
1899 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1900 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1901 int err = -EOPNOTSUPP;
1902
1903 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1904 if (down_interruptible(&fepriv->sem))
1905 return -ERESTARTSYS;
1906
1907 if (fepriv->exit != DVB_FE_NO_EXIT) {
1908 up(&fepriv->sem);
1909 return -ENODEV;
1910 }
1911
1912 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1913 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1914 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1915 up(&fepriv->sem);
1916 return -EPERM;
1917 }
1918
1919 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1920 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1921 else {
1922 c->state = DTV_UNDEFINED;
1923 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1924 }
1925
1926 up(&fepriv->sem);
1927 return err;
1928 }
1929
1930 static int dvb_frontend_ioctl_properties(struct file *file,
1931 unsigned int cmd, void *parg)
1932 {
1933 struct dvb_device *dvbdev = file->private_data;
1934 struct dvb_frontend *fe = dvbdev->priv;
1935 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1936 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1937 int err = 0;
1938
1939 struct dtv_properties *tvps = NULL;
1940 struct dtv_property *tvp = NULL;
1941 int i;
1942
1943 dev_dbg(fe->dvb->device, "%s:\n", __func__);
1944
1945 if(cmd == FE_SET_PROPERTY) {
1946 tvps = (struct dtv_properties __user *)parg;
1947
1948 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1949 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1950
1951 /* Put an arbitrary limit on the number of messages that can
1952 * be sent at once */
1953 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1954 return -EINVAL;
1955
1956 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1957 if (!tvp) {
1958 err = -ENOMEM;
1959 goto out;
1960 }
1961
1962 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1963 err = -EFAULT;
1964 goto out;
1965 }
1966
1967 for (i = 0; i < tvps->num; i++) {
1968 err = dtv_property_process_set(fe, tvp + i, file);
1969 if (err < 0)
1970 goto out;
1971 (tvp + i)->result = err;
1972 }
1973
1974 if (c->state == DTV_TUNE)
1975 dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1976
1977 } else
1978 if(cmd == FE_GET_PROPERTY) {
1979 tvps = (struct dtv_properties __user *)parg;
1980
1981 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1982 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1983
1984 /* Put an arbitrary limit on the number of messages that can
1985 * be sent at once */
1986 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1987 return -EINVAL;
1988
1989 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1990 if (!tvp) {
1991 err = -ENOMEM;
1992 goto out;
1993 }
1994
1995 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1996 err = -EFAULT;
1997 goto out;
1998 }
1999
2000 /*
2001 * Fills the cache out struct with the cache contents, plus
2002 * the data retrieved from get_frontend, if the frontend
2003 * is not idle. Otherwise, returns the cached content
2004 */
2005 if (fepriv->state != FESTATE_IDLE) {
2006 err = dtv_get_frontend(fe, NULL);
2007 if (err < 0)
2008 goto out;
2009 }
2010 for (i = 0; i < tvps->num; i++) {
2011 err = dtv_property_process_get(fe, c, tvp + i, file);
2012 if (err < 0)
2013 goto out;
2014 (tvp + i)->result = err;
2015 }
2016
2017 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
2018 err = -EFAULT;
2019 goto out;
2020 }
2021
2022 } else
2023 err = -EOPNOTSUPP;
2024
2025 out:
2026 kfree(tvp);
2027 return err;
2028 }
2029
2030 static int dtv_set_frontend(struct dvb_frontend *fe)
2031 {
2032 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2033 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2034 struct dvb_frontend_tune_settings fetunesettings;
2035 u32 rolloff = 0;
2036
2037 if (dvb_frontend_check_parameters(fe) < 0)
2038 return -EINVAL;
2039
2040 /*
2041 * Initialize output parameters to match the values given by
2042 * the user. FE_SET_FRONTEND triggers an initial frontend event
2043 * with status = 0, which copies output parameters to userspace.
2044 */
2045 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
2046
2047 /*
2048 * Be sure that the bandwidth will be filled for all
2049 * non-satellite systems, as tuners need to know what
2050 * low pass/Nyquist half filter should be applied, in
2051 * order to avoid inter-channel noise.
2052 *
2053 * ISDB-T and DVB-T/T2 already sets bandwidth.
2054 * ATSC and DVB-C don't set, so, the core should fill it.
2055 *
2056 * On DVB-C Annex A and C, the bandwidth is a function of
2057 * the roll-off and symbol rate. Annex B defines different
2058 * roll-off factors depending on the modulation. Fortunately,
2059 * Annex B is only used with 6MHz, so there's no need to
2060 * calculate it.
2061 *
2062 * While not officially supported, a side effect of handling it at
2063 * the cache level is that a program could retrieve the bandwidth
2064 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2065 */
2066 switch (c->delivery_system) {
2067 case SYS_ATSC:
2068 case SYS_DVBC_ANNEX_B:
2069 c->bandwidth_hz = 6000000;
2070 break;
2071 case SYS_DVBC_ANNEX_A:
2072 rolloff = 115;
2073 break;
2074 case SYS_DVBC_ANNEX_C:
2075 rolloff = 113;
2076 break;
2077 default:
2078 break;
2079 }
2080 if (rolloff)
2081 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
2082
2083 /* force auto frequency inversion if requested */
2084 if (dvb_force_auto_inversion)
2085 c->inversion = INVERSION_AUTO;
2086
2087 /*
2088 * without hierarchical coding code_rate_LP is irrelevant,
2089 * so we tolerate the otherwise invalid FEC_NONE setting
2090 */
2091 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2092 c->code_rate_LP = FEC_AUTO;
2093
2094 /* get frontend-specific tuning settings */
2095 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2096 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2097 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2098 fepriv->max_drift = fetunesettings.max_drift;
2099 fepriv->step_size = fetunesettings.step_size;
2100 } else {
2101 /* default values */
2102 switch (c->delivery_system) {
2103 case SYS_DVBS:
2104 case SYS_DVBS2:
2105 case SYS_ISDBS:
2106 case SYS_TURBO:
2107 case SYS_DVBC_ANNEX_A:
2108 case SYS_DVBC_ANNEX_C:
2109 fepriv->min_delay = HZ / 20;
2110 fepriv->step_size = c->symbol_rate / 16000;
2111 fepriv->max_drift = c->symbol_rate / 2000;
2112 break;
2113 case SYS_DVBT:
2114 case SYS_DVBT2:
2115 case SYS_ISDBT:
2116 case SYS_DTMB:
2117 fepriv->min_delay = HZ / 20;
2118 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2119 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2120 break;
2121 default:
2122 /*
2123 * FIXME: This sounds wrong! if freqency_stepsize is
2124 * defined by the frontend, why not use it???
2125 */
2126 fepriv->min_delay = HZ / 20;
2127 fepriv->step_size = 0; /* no zigzag */
2128 fepriv->max_drift = 0;
2129 break;
2130 }
2131 }
2132 if (dvb_override_tune_delay > 0)
2133 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2134
2135 fepriv->state = FESTATE_RETUNE;
2136
2137 /* Request the search algorithm to search */
2138 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2139
2140 dvb_frontend_clear_events(fe);
2141 dvb_frontend_add_event(fe, 0);
2142 dvb_frontend_wakeup(fe);
2143 fepriv->status = 0;
2144
2145 return 0;
2146 }
2147
2148
2149 static int dvb_frontend_ioctl_legacy(struct file *file,
2150 unsigned int cmd, void *parg)
2151 {
2152 struct dvb_device *dvbdev = file->private_data;
2153 struct dvb_frontend *fe = dvbdev->priv;
2154 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2155 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2156 int err = -EOPNOTSUPP;
2157
2158 switch (cmd) {
2159 case FE_GET_INFO: {
2160 struct dvb_frontend_info* info = parg;
2161
2162 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2163 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2164
2165 /*
2166 * Associate the 4 delivery systems supported by DVBv3
2167 * API with their DVBv5 counterpart. For the other standards,
2168 * use the closest type, assuming that it would hopefully
2169 * work with a DVBv3 application.
2170 * It should be noticed that, on multi-frontend devices with
2171 * different types (terrestrial and cable, for example),
2172 * a pure DVBv3 application won't be able to use all delivery
2173 * systems. Yet, changing the DVBv5 cache to the other delivery
2174 * system should be enough for making it work.
2175 */
2176 switch (dvbv3_type(c->delivery_system)) {
2177 case DVBV3_QPSK:
2178 info->type = FE_QPSK;
2179 break;
2180 case DVBV3_ATSC:
2181 info->type = FE_ATSC;
2182 break;
2183 case DVBV3_QAM:
2184 info->type = FE_QAM;
2185 break;
2186 case DVBV3_OFDM:
2187 info->type = FE_OFDM;
2188 break;
2189 default:
2190 dev_err(fe->dvb->device,
2191 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2192 __func__, c->delivery_system);
2193 fe->ops.info.type = FE_OFDM;
2194 }
2195 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2196 __func__, c->delivery_system, fe->ops.info.type);
2197
2198 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2199 * do it, it is done for it. */
2200 info->caps |= FE_CAN_INVERSION_AUTO;
2201 err = 0;
2202 break;
2203 }
2204
2205 case FE_READ_STATUS: {
2206 fe_status_t* status = parg;
2207
2208 /* if retune was requested but hasn't occurred yet, prevent
2209 * that user get signal state from previous tuning */
2210 if (fepriv->state == FESTATE_RETUNE ||
2211 fepriv->state == FESTATE_ERROR) {
2212 err=0;
2213 *status = 0;
2214 break;
2215 }
2216
2217 if (fe->ops.read_status)
2218 err = fe->ops.read_status(fe, status);
2219 break;
2220 }
2221
2222 case FE_READ_BER:
2223 if (fe->ops.read_ber) {
2224 if (fepriv->thread)
2225 err = fe->ops.read_ber(fe, (__u32 *) parg);
2226 else
2227 err = -EAGAIN;
2228 }
2229 break;
2230
2231 case FE_READ_SIGNAL_STRENGTH:
2232 if (fe->ops.read_signal_strength) {
2233 if (fepriv->thread)
2234 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2235 else
2236 err = -EAGAIN;
2237 }
2238 break;
2239
2240 case FE_READ_SNR:
2241 if (fe->ops.read_snr) {
2242 if (fepriv->thread)
2243 err = fe->ops.read_snr(fe, (__u16 *) parg);
2244 else
2245 err = -EAGAIN;
2246 }
2247 break;
2248
2249 case FE_READ_UNCORRECTED_BLOCKS:
2250 if (fe->ops.read_ucblocks) {
2251 if (fepriv->thread)
2252 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2253 else
2254 err = -EAGAIN;
2255 }
2256 break;
2257
2258 case FE_DISEQC_RESET_OVERLOAD:
2259 if (fe->ops.diseqc_reset_overload) {
2260 err = fe->ops.diseqc_reset_overload(fe);
2261 fepriv->state = FESTATE_DISEQC;
2262 fepriv->status = 0;
2263 }
2264 break;
2265
2266 case FE_DISEQC_SEND_MASTER_CMD:
2267 if (fe->ops.diseqc_send_master_cmd) {
2268 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2269 fepriv->state = FESTATE_DISEQC;
2270 fepriv->status = 0;
2271 }
2272 break;
2273
2274 case FE_DISEQC_SEND_BURST:
2275 if (fe->ops.diseqc_send_burst) {
2276 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2277 fepriv->state = FESTATE_DISEQC;
2278 fepriv->status = 0;
2279 }
2280 break;
2281
2282 case FE_SET_TONE:
2283 if (fe->ops.set_tone) {
2284 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2285 fepriv->tone = (fe_sec_tone_mode_t) parg;
2286 fepriv->state = FESTATE_DISEQC;
2287 fepriv->status = 0;
2288 }
2289 break;
2290
2291 case FE_SET_VOLTAGE:
2292 if (fe->ops.set_voltage) {
2293 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2294 fepriv->voltage = (fe_sec_voltage_t) parg;
2295 fepriv->state = FESTATE_DISEQC;
2296 fepriv->status = 0;
2297 }
2298 break;
2299
2300 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2301 if (fe->ops.dishnetwork_send_legacy_command) {
2302 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2303 fepriv->state = FESTATE_DISEQC;
2304 fepriv->status = 0;
2305 } else if (fe->ops.set_voltage) {
2306 /*
2307 * NOTE: This is a fallback condition. Some frontends
2308 * (stv0299 for instance) take longer than 8msec to
2309 * respond to a set_voltage command. Those switches
2310 * need custom routines to switch properly. For all
2311 * other frontends, the following should work ok.
2312 * Dish network legacy switches (as used by Dish500)
2313 * are controlled by sending 9-bit command words
2314 * spaced 8msec apart.
2315 * the actual command word is switch/port dependent
2316 * so it is up to the userspace application to send
2317 * the right command.
2318 * The command must always start with a '0' after
2319 * initialization, so parg is 8 bits and does not
2320 * include the initialization or start bit
2321 */
2322 unsigned long swcmd = ((unsigned long) parg) << 1;
2323 struct timeval nexttime;
2324 struct timeval tv[10];
2325 int i;
2326 u8 last = 1;
2327 if (dvb_frontend_debug)
2328 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2329 do_gettimeofday(&nexttime);
2330 if (dvb_frontend_debug)
2331 tv[0] = nexttime;
2332 /* before sending a command, initialize by sending
2333 * a 32ms 18V to the switch
2334 */
2335 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2336 dvb_frontend_sleep_until(&nexttime, 32000);
2337
2338 for (i = 0; i < 9; i++) {
2339 if (dvb_frontend_debug)
2340 do_gettimeofday(&tv[i + 1]);
2341 if ((swcmd & 0x01) != last) {
2342 /* set voltage to (last ? 13V : 18V) */
2343 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2344 last = (last) ? 0 : 1;
2345 }
2346 swcmd = swcmd >> 1;
2347 if (i != 8)
2348 dvb_frontend_sleep_until(&nexttime, 8000);
2349 }
2350 if (dvb_frontend_debug) {
2351 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2352 __func__, fe->dvb->num);
2353 for (i = 1; i < 10; i++)
2354 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2355 }
2356 err = 0;
2357 fepriv->state = FESTATE_DISEQC;
2358 fepriv->status = 0;
2359 }
2360 break;
2361
2362 case FE_DISEQC_RECV_SLAVE_REPLY:
2363 if (fe->ops.diseqc_recv_slave_reply)
2364 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2365 break;
2366
2367 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2368 if (fe->ops.enable_high_lnb_voltage)
2369 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2370 break;
2371
2372 case FE_SET_FRONTEND:
2373 err = dvbv3_set_delivery_system(fe);
2374 if (err)
2375 break;
2376
2377 err = dtv_property_cache_sync(fe, c, parg);
2378 if (err)
2379 break;
2380 err = dtv_set_frontend(fe);
2381 break;
2382 case FE_GET_EVENT:
2383 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2384 break;
2385
2386 case FE_GET_FRONTEND:
2387 err = dtv_get_frontend(fe, parg);
2388 break;
2389
2390 case FE_SET_FRONTEND_TUNE_MODE:
2391 fepriv->tune_mode_flags = (unsigned long) parg;
2392 err = 0;
2393 break;
2394 }
2395
2396 return err;
2397 }
2398
2399
2400 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2401 {
2402 struct dvb_device *dvbdev = file->private_data;
2403 struct dvb_frontend *fe = dvbdev->priv;
2404 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2405
2406 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2407
2408 poll_wait (file, &fepriv->events.wait_queue, wait);
2409
2410 if (fepriv->events.eventw != fepriv->events.eventr)
2411 return (POLLIN | POLLRDNORM | POLLPRI);
2412
2413 return 0;
2414 }
2415
2416 static int dvb_frontend_open(struct inode *inode, struct file *file)
2417 {
2418 struct dvb_device *dvbdev = file->private_data;
2419 struct dvb_frontend *fe = dvbdev->priv;
2420 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2421 struct dvb_adapter *adapter = fe->dvb;
2422 int ret;
2423
2424 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2425 if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2426 return -ENODEV;
2427
2428 if (adapter->mfe_shared) {
2429 mutex_lock (&adapter->mfe_lock);
2430
2431 if (adapter->mfe_dvbdev == NULL)
2432 adapter->mfe_dvbdev = dvbdev;
2433
2434 else if (adapter->mfe_dvbdev != dvbdev) {
2435 struct dvb_device
2436 *mfedev = adapter->mfe_dvbdev;
2437 struct dvb_frontend
2438 *mfe = mfedev->priv;
2439 struct dvb_frontend_private
2440 *mfepriv = mfe->frontend_priv;
2441 int mferetry = (dvb_mfe_wait_time << 1);
2442
2443 mutex_unlock (&adapter->mfe_lock);
2444 while (mferetry-- && (mfedev->users != -1 ||
2445 mfepriv->thread != NULL)) {
2446 if(msleep_interruptible(500)) {
2447 if(signal_pending(current))
2448 return -EINTR;
2449 }
2450 }
2451
2452 mutex_lock (&adapter->mfe_lock);
2453 if(adapter->mfe_dvbdev != dvbdev) {
2454 mfedev = adapter->mfe_dvbdev;
2455 mfe = mfedev->priv;
2456 mfepriv = mfe->frontend_priv;
2457 if (mfedev->users != -1 ||
2458 mfepriv->thread != NULL) {
2459 mutex_unlock (&adapter->mfe_lock);
2460 return -EBUSY;
2461 }
2462 adapter->mfe_dvbdev = dvbdev;
2463 }
2464 }
2465 }
2466
2467 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2468 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2469 goto err0;
2470
2471 /* If we took control of the bus, we need to force
2472 reinitialization. This is because many ts_bus_ctrl()
2473 functions strobe the RESET pin on the demod, and if the
2474 frontend thread already exists then the dvb_init() routine
2475 won't get called (which is what usually does initial
2476 register configuration). */
2477 fepriv->reinitialise = 1;
2478 }
2479
2480 if ((ret = dvb_generic_open (inode, file)) < 0)
2481 goto err1;
2482
2483 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2484 /* normal tune mode when opened R/W */
2485 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2486 fepriv->tone = -1;
2487 fepriv->voltage = -1;
2488
2489 ret = dvb_frontend_start (fe);
2490 if (ret)
2491 goto err2;
2492
2493 /* empty event queue */
2494 fepriv->events.eventr = fepriv->events.eventw = 0;
2495 }
2496
2497 if (adapter->mfe_shared)
2498 mutex_unlock (&adapter->mfe_lock);
2499 return ret;
2500
2501 err2:
2502 dvb_generic_release(inode, file);
2503 err1:
2504 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2505 fe->ops.ts_bus_ctrl(fe, 0);
2506 err0:
2507 if (adapter->mfe_shared)
2508 mutex_unlock (&adapter->mfe_lock);
2509 return ret;
2510 }
2511
2512 static int dvb_frontend_release(struct inode *inode, struct file *file)
2513 {
2514 struct dvb_device *dvbdev = file->private_data;
2515 struct dvb_frontend *fe = dvbdev->priv;
2516 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2517 int ret;
2518
2519 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2520
2521 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2522 fepriv->release_jiffies = jiffies;
2523 mb();
2524 }
2525
2526 ret = dvb_generic_release (inode, file);
2527
2528 if (dvbdev->users == -1) {
2529 wake_up(&fepriv->wait_queue);
2530 if (fepriv->exit != DVB_FE_NO_EXIT)
2531 wake_up(&dvbdev->wait_queue);
2532 if (fe->ops.ts_bus_ctrl)
2533 fe->ops.ts_bus_ctrl(fe, 0);
2534 }
2535
2536 return ret;
2537 }
2538
2539 static const struct file_operations dvb_frontend_fops = {
2540 .owner = THIS_MODULE,
2541 .unlocked_ioctl = dvb_generic_ioctl,
2542 .poll = dvb_frontend_poll,
2543 .open = dvb_frontend_open,
2544 .release = dvb_frontend_release,
2545 .llseek = noop_llseek,
2546 };
2547
2548 int dvb_frontend_suspend(struct dvb_frontend *fe)
2549 {
2550 int ret = 0;
2551
2552 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2553 fe->id);
2554
2555 if (fe->ops.tuner_ops.sleep)
2556 ret = fe->ops.tuner_ops.sleep(fe);
2557
2558 if (fe->ops.sleep)
2559 ret = fe->ops.sleep(fe);
2560
2561 return ret;
2562 }
2563 EXPORT_SYMBOL(dvb_frontend_suspend);
2564
2565 int dvb_frontend_resume(struct dvb_frontend *fe)
2566 {
2567 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2568 int ret = 0;
2569
2570 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2571 fe->id);
2572
2573 if (fe->ops.init)
2574 ret = fe->ops.init(fe);
2575
2576 if (fe->ops.tuner_ops.init)
2577 ret = fe->ops.tuner_ops.init(fe);
2578
2579 fepriv->state = FESTATE_RETUNE;
2580 dvb_frontend_wakeup(fe);
2581
2582 return ret;
2583 }
2584 EXPORT_SYMBOL(dvb_frontend_resume);
2585
2586 int dvb_register_frontend(struct dvb_adapter* dvb,
2587 struct dvb_frontend* fe)
2588 {
2589 struct dvb_frontend_private *fepriv;
2590 static const struct dvb_device dvbdev_template = {
2591 .users = ~0,
2592 .writers = 1,
2593 .readers = (~0)-1,
2594 .fops = &dvb_frontend_fops,
2595 .kernel_ioctl = dvb_frontend_ioctl
2596 };
2597
2598 dev_dbg(dvb->device, "%s:\n", __func__);
2599
2600 if (mutex_lock_interruptible(&frontend_mutex))
2601 return -ERESTARTSYS;
2602
2603 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2604 if (fe->frontend_priv == NULL) {
2605 mutex_unlock(&frontend_mutex);
2606 return -ENOMEM;
2607 }
2608 fepriv = fe->frontend_priv;
2609
2610 sema_init(&fepriv->sem, 1);
2611 init_waitqueue_head (&fepriv->wait_queue);
2612 init_waitqueue_head (&fepriv->events.wait_queue);
2613 mutex_init(&fepriv->events.mtx);
2614 fe->dvb = dvb;
2615 fepriv->inversion = INVERSION_OFF;
2616
2617 dev_info(fe->dvb->device,
2618 "DVB: registering adapter %i frontend %i (%s)...\n",
2619 fe->dvb->num, fe->id, fe->ops.info.name);
2620
2621 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2622 fe, DVB_DEVICE_FRONTEND);
2623
2624 /*
2625 * Initialize the cache to the proper values according with the
2626 * first supported delivery system (ops->delsys[0])
2627 */
2628
2629 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2630 dvb_frontend_clear_cache(fe);
2631
2632 mutex_unlock(&frontend_mutex);
2633 return 0;
2634 }
2635 EXPORT_SYMBOL(dvb_register_frontend);
2636
2637 int dvb_unregister_frontend(struct dvb_frontend* fe)
2638 {
2639 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2640 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2641
2642 mutex_lock(&frontend_mutex);
2643 dvb_frontend_stop (fe);
2644 mutex_unlock(&frontend_mutex);
2645
2646 if (fepriv->dvbdev->users < -1)
2647 wait_event(fepriv->dvbdev->wait_queue,
2648 fepriv->dvbdev->users==-1);
2649
2650 mutex_lock(&frontend_mutex);
2651 dvb_unregister_device (fepriv->dvbdev);
2652
2653 /* fe is invalid now */
2654 kfree(fepriv);
2655 mutex_unlock(&frontend_mutex);
2656 return 0;
2657 }
2658 EXPORT_SYMBOL(dvb_unregister_frontend);
2659
2660 #ifdef CONFIG_MEDIA_ATTACH
2661 void dvb_frontend_detach(struct dvb_frontend* fe)
2662 {
2663 void *ptr;
2664
2665 if (fe->ops.release_sec) {
2666 fe->ops.release_sec(fe);
2667 symbol_put_addr(fe->ops.release_sec);
2668 }
2669 if (fe->ops.tuner_ops.release) {
2670 fe->ops.tuner_ops.release(fe);
2671 symbol_put_addr(fe->ops.tuner_ops.release);
2672 }
2673 if (fe->ops.analog_ops.release) {
2674 fe->ops.analog_ops.release(fe);
2675 symbol_put_addr(fe->ops.analog_ops.release);
2676 }
2677 ptr = (void*)fe->ops.release;
2678 if (ptr) {
2679 fe->ops.release(fe);
2680 symbol_put_addr(ptr);
2681 }
2682 }
2683 #else
2684 void dvb_frontend_detach(struct dvb_frontend* fe)
2685 {
2686 if (fe->ops.release_sec)
2687 fe->ops.release_sec(fe);
2688 if (fe->ops.tuner_ops.release)
2689 fe->ops.tuner_ops.release(fe);
2690 if (fe->ops.analog_ops.release)
2691 fe->ops.analog_ops.release(fe);
2692 if (fe->ops.release)
2693 fe->ops.release(fe);
2694 }
2695 #endif
2696 EXPORT_SYMBOL(dvb_frontend_detach);
Linux with added FPC-III support