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 * To obtain the license, point your browser to
22 * http://www.gnu.org/copyleft/gpl.html
23 */
24
25 /* Enables DVBv3 compatibility bits at the headers */
26 #define __DVB_CORE__
27
28 #define pr_fmt(fmt) "dvb_frontend: " fmt
29
30 #include <linux/string.h>
31 #include <linux/kernel.h>
32 #include <linux/sched/signal.h>
33 #include <linux/wait.h>
34 #include <linux/slab.h>
35 #include <linux/poll.h>
36 #include <linux/semaphore.h>
37 #include <linux/module.h>
38 #include <linux/list.h>
39 #include <linux/freezer.h>
40 #include <linux/jiffies.h>
41 #include <linux/kthread.h>
42 #include <linux/ktime.h>
43 #include <linux/compat.h>
44 #include <asm/processor.h>
45
46 #include <media/dvb_frontend.h>
47 #include <media/dvbdev.h>
48 #include <linux/dvb/version.h>
49
50 static int dvb_frontend_debug;
51 static int dvb_shutdown_timeout;
52 static int dvb_force_auto_inversion;
53 static int dvb_override_tune_delay;
54 static int dvb_powerdown_on_sleep = 1;
55 static int dvb_mfe_wait_time = 5;
56
57 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
58 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
59 module_param(dvb_shutdown_timeout, int, 0644);
60 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
61 module_param(dvb_force_auto_inversion, int, 0644);
62 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
63 module_param(dvb_override_tune_delay, int, 0644);
64 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
65 module_param(dvb_powerdown_on_sleep, int, 0644);
66 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
67 module_param(dvb_mfe_wait_time, int, 0644);
68 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
69
70 #define dprintk(fmt, arg...) \
71 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
72
73 #define FESTATE_IDLE 1
74 #define FESTATE_RETUNE 2
75 #define FESTATE_TUNING_FAST 4
76 #define FESTATE_TUNING_SLOW 8
77 #define FESTATE_TUNED 16
78 #define FESTATE_ZIGZAG_FAST 32
79 #define FESTATE_ZIGZAG_SLOW 64
80 #define FESTATE_DISEQC 128
81 #define FESTATE_ERROR 256
82 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
83 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
84 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
85 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
86
87 /*
88 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
89 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
90 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
91 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
92 * FESTATE_TUNED. The frontend has successfully locked on.
93 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
94 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
95 * FESTATE_DISEQC. A DISEQC command has just been issued.
96 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
97 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
98 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
99 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
100 */
101
102 static DEFINE_MUTEX(frontend_mutex);
103
104 struct dvb_frontend_private {
105 /* thread/frontend values */
106 struct dvb_device *dvbdev;
107 struct dvb_frontend_parameters parameters_out;
108 struct dvb_fe_events events;
109 struct semaphore sem;
110 struct list_head list_head;
111 wait_queue_head_t wait_queue;
112 struct task_struct *thread;
113 unsigned long release_jiffies;
114 unsigned int wakeup;
115 enum fe_status status;
116 unsigned long tune_mode_flags;
117 unsigned int delay;
118 unsigned int reinitialise;
119 int tone;
120 int voltage;
121
122 /* swzigzag values */
123 unsigned int state;
124 unsigned int bending;
125 int lnb_drift;
126 unsigned int inversion;
127 unsigned int auto_step;
128 unsigned int auto_sub_step;
129 unsigned int started_auto_step;
130 unsigned int min_delay;
131 unsigned int max_drift;
132 unsigned int step_size;
133 int quality;
134 unsigned int check_wrapped;
135 enum dvbfe_search algo_status;
136
137 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
138 struct media_pipeline pipe;
139 #endif
140 };
141
142 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
143 void (*release)(struct dvb_frontend *fe));
144
__dvb_frontend_free(struct dvb_frontend * fe)145 static void __dvb_frontend_free(struct dvb_frontend *fe)
146 {
147 struct dvb_frontend_private *fepriv = fe->frontend_priv;
148
149 if (fepriv)
150 dvb_free_device(fepriv->dvbdev);
151
152 dvb_frontend_invoke_release(fe, fe->ops.release);
153
154 kfree(fepriv);
155 }
156
dvb_frontend_free(struct kref * ref)157 static void dvb_frontend_free(struct kref *ref)
158 {
159 struct dvb_frontend *fe =
160 container_of(ref, struct dvb_frontend, refcount);
161
162 __dvb_frontend_free(fe);
163 }
164
dvb_frontend_put(struct dvb_frontend * fe)165 static void dvb_frontend_put(struct dvb_frontend *fe)
166 {
167 /* call detach before dropping the reference count */
168 if (fe->ops.detach)
169 fe->ops.detach(fe);
170 /*
171 * Check if the frontend was registered, as otherwise
172 * kref was not initialized yet.
173 */
174 if (fe->frontend_priv)
175 kref_put(&fe->refcount, dvb_frontend_free);
176 else
177 __dvb_frontend_free(fe);
178 }
179
dvb_frontend_get(struct dvb_frontend * fe)180 static void dvb_frontend_get(struct dvb_frontend *fe)
181 {
182 kref_get(&fe->refcount);
183 }
184
185 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
186 static int dtv_get_frontend(struct dvb_frontend *fe,
187 struct dtv_frontend_properties *c,
188 struct dvb_frontend_parameters *p_out);
189 static int
190 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
191 const struct dtv_frontend_properties *c,
192 struct dvb_frontend_parameters *p);
193
has_get_frontend(struct dvb_frontend * fe)194 static bool has_get_frontend(struct dvb_frontend *fe)
195 {
196 return fe->ops.get_frontend;
197 }
198
199 /*
200 * Due to DVBv3 API calls, a delivery system should be mapped into one of
201 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
202 * otherwise, a DVBv3 call will fail.
203 */
204 enum dvbv3_emulation_type {
205 DVBV3_UNKNOWN,
206 DVBV3_QPSK,
207 DVBV3_QAM,
208 DVBV3_OFDM,
209 DVBV3_ATSC,
210 };
211
dvbv3_type(u32 delivery_system)212 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
213 {
214 switch (delivery_system) {
215 case SYS_DVBC_ANNEX_A:
216 case SYS_DVBC_ANNEX_C:
217 return DVBV3_QAM;
218 case SYS_DVBS:
219 case SYS_DVBS2:
220 case SYS_TURBO:
221 case SYS_ISDBS:
222 case SYS_DSS:
223 return DVBV3_QPSK;
224 case SYS_DVBT:
225 case SYS_DVBT2:
226 case SYS_ISDBT:
227 case SYS_DTMB:
228 return DVBV3_OFDM;
229 case SYS_ATSC:
230 case SYS_ATSCMH:
231 case SYS_DVBC_ANNEX_B:
232 return DVBV3_ATSC;
233 case SYS_UNDEFINED:
234 case SYS_ISDBC:
235 case SYS_DVBH:
236 case SYS_DAB:
237 default:
238 /*
239 * Doesn't know how to emulate those types and/or
240 * there's no frontend driver from this type yet
241 * with some emulation code, so, we're not sure yet how
242 * to handle them, or they're not compatible with a DVBv3 call.
243 */
244 return DVBV3_UNKNOWN;
245 }
246 }
247
dvb_frontend_add_event(struct dvb_frontend * fe,enum fe_status status)248 static void dvb_frontend_add_event(struct dvb_frontend *fe,
249 enum fe_status status)
250 {
251 struct dvb_frontend_private *fepriv = fe->frontend_priv;
252 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
253 struct dvb_fe_events *events = &fepriv->events;
254 struct dvb_frontend_event *e;
255 int wp;
256
257 dev_dbg(fe->dvb->device, "%s:\n", __func__);
258
259 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
260 dtv_get_frontend(fe, c, &fepriv->parameters_out);
261
262 mutex_lock(&events->mtx);
263
264 wp = (events->eventw + 1) % MAX_EVENT;
265 if (wp == events->eventr) {
266 events->overflow = 1;
267 events->eventr = (events->eventr + 1) % MAX_EVENT;
268 }
269
270 e = &events->events[events->eventw];
271 e->status = status;
272 e->parameters = fepriv->parameters_out;
273
274 events->eventw = wp;
275
276 mutex_unlock(&events->mtx);
277
278 wake_up_interruptible(&events->wait_queue);
279 }
280
dvb_frontend_test_event(struct dvb_frontend_private * fepriv,struct dvb_fe_events * events)281 static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv,
282 struct dvb_fe_events *events)
283 {
284 int ret;
285
286 up(&fepriv->sem);
287 ret = events->eventw != events->eventr;
288 down(&fepriv->sem);
289
290 return ret;
291 }
292
dvb_frontend_get_event(struct dvb_frontend * fe,struct dvb_frontend_event * event,int flags)293 static int dvb_frontend_get_event(struct dvb_frontend *fe,
294 struct dvb_frontend_event *event, int flags)
295 {
296 struct dvb_frontend_private *fepriv = fe->frontend_priv;
297 struct dvb_fe_events *events = &fepriv->events;
298
299 dev_dbg(fe->dvb->device, "%s:\n", __func__);
300
301 if (events->overflow) {
302 events->overflow = 0;
303 return -EOVERFLOW;
304 }
305
306 if (events->eventw == events->eventr) {
307 int ret;
308
309 if (flags & O_NONBLOCK)
310 return -EWOULDBLOCK;
311
312 ret = wait_event_interruptible(events->wait_queue,
313 dvb_frontend_test_event(fepriv, events));
314
315 if (ret < 0)
316 return ret;
317 }
318
319 mutex_lock(&events->mtx);
320 *event = events->events[events->eventr];
321 events->eventr = (events->eventr + 1) % MAX_EVENT;
322 mutex_unlock(&events->mtx);
323
324 return 0;
325 }
326
dvb_frontend_clear_events(struct dvb_frontend * fe)327 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
328 {
329 struct dvb_frontend_private *fepriv = fe->frontend_priv;
330 struct dvb_fe_events *events = &fepriv->events;
331
332 mutex_lock(&events->mtx);
333 events->eventr = events->eventw;
334 mutex_unlock(&events->mtx);
335 }
336
dvb_frontend_init(struct dvb_frontend * fe)337 static void dvb_frontend_init(struct dvb_frontend *fe)
338 {
339 dev_dbg(fe->dvb->device,
340 "%s: initialising adapter %i frontend %i (%s)...\n",
341 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
342
343 if (fe->ops.init)
344 fe->ops.init(fe);
345 if (fe->ops.tuner_ops.init) {
346 if (fe->ops.i2c_gate_ctrl)
347 fe->ops.i2c_gate_ctrl(fe, 1);
348 fe->ops.tuner_ops.init(fe);
349 if (fe->ops.i2c_gate_ctrl)
350 fe->ops.i2c_gate_ctrl(fe, 0);
351 }
352 }
353
dvb_frontend_reinitialise(struct dvb_frontend * fe)354 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
355 {
356 struct dvb_frontend_private *fepriv = fe->frontend_priv;
357
358 fepriv->reinitialise = 1;
359 dvb_frontend_wakeup(fe);
360 }
361 EXPORT_SYMBOL(dvb_frontend_reinitialise);
362
dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private * fepriv,int locked)363 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
364 {
365 int q2;
366 struct dvb_frontend *fe = fepriv->dvbdev->priv;
367
368 dev_dbg(fe->dvb->device, "%s:\n", __func__);
369
370 if (locked)
371 (fepriv->quality) = (fepriv->quality * 220 + 36 * 256) / 256;
372 else
373 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
374
375 q2 = fepriv->quality - 128;
376 q2 *= q2;
377
378 fepriv->delay = fepriv->min_delay + q2 * HZ / (128 * 128);
379 }
380
381 /**
382 * dvb_frontend_swzigzag_autotune - Performs automatic twiddling of frontend
383 * parameters.
384 *
385 * @fe: The frontend concerned.
386 * @check_wrapped: Checks if an iteration has completed.
387 * DO NOT SET ON THE FIRST ATTEMPT.
388 *
389 * return: Number of complete iterations that have been performed.
390 */
dvb_frontend_swzigzag_autotune(struct dvb_frontend * fe,int check_wrapped)391 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
392 {
393 int autoinversion;
394 int ready = 0;
395 int fe_set_err = 0;
396 struct dvb_frontend_private *fepriv = fe->frontend_priv;
397 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
398 int original_inversion = c->inversion;
399 u32 original_frequency = c->frequency;
400
401 /* are we using autoinversion? */
402 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
403 (c->inversion == INVERSION_AUTO));
404
405 /* setup parameters correctly */
406 while (!ready) {
407 /* calculate the lnb_drift */
408 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
409
410 /* wrap the auto_step if we've exceeded the maximum drift */
411 if (fepriv->lnb_drift > fepriv->max_drift) {
412 fepriv->auto_step = 0;
413 fepriv->auto_sub_step = 0;
414 fepriv->lnb_drift = 0;
415 }
416
417 /* perform inversion and +/- zigzag */
418 switch (fepriv->auto_sub_step) {
419 case 0:
420 /* try with the current inversion and current drift setting */
421 ready = 1;
422 break;
423
424 case 1:
425 if (!autoinversion) break;
426
427 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
428 ready = 1;
429 break;
430
431 case 2:
432 if (fepriv->lnb_drift == 0) break;
433
434 fepriv->lnb_drift = -fepriv->lnb_drift;
435 ready = 1;
436 break;
437
438 case 3:
439 if (fepriv->lnb_drift == 0) break;
440 if (!autoinversion) break;
441
442 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
443 fepriv->lnb_drift = -fepriv->lnb_drift;
444 ready = 1;
445 break;
446
447 default:
448 fepriv->auto_step++;
449 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
450 break;
451 }
452
453 if (!ready) fepriv->auto_sub_step++;
454 }
455
456 /* if this attempt would hit where we started, indicate a complete
457 * iteration has occurred */
458 if ((fepriv->auto_step == fepriv->started_auto_step) &&
459 (fepriv->auto_sub_step == 0) && check_wrapped) {
460 return 1;
461 }
462
463 dev_dbg(fe->dvb->device,
464 "%s: drift:%i inversion:%i auto_step:%i auto_sub_step:%i started_auto_step:%i\n",
465 __func__, fepriv->lnb_drift, fepriv->inversion,
466 fepriv->auto_step, fepriv->auto_sub_step,
467 fepriv->started_auto_step);
468
469 /* set the frontend itself */
470 c->frequency += fepriv->lnb_drift;
471 if (autoinversion)
472 c->inversion = fepriv->inversion;
473 tmp = *c;
474 if (fe->ops.set_frontend)
475 fe_set_err = fe->ops.set_frontend(fe);
476 *c = tmp;
477 if (fe_set_err < 0) {
478 fepriv->state = FESTATE_ERROR;
479 return fe_set_err;
480 }
481
482 c->frequency = original_frequency;
483 c->inversion = original_inversion;
484
485 fepriv->auto_sub_step++;
486 return 0;
487 }
488
dvb_frontend_swzigzag(struct dvb_frontend * fe)489 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
490 {
491 enum fe_status s = FE_NONE;
492 int retval = 0;
493 struct dvb_frontend_private *fepriv = fe->frontend_priv;
494 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
495
496 /* if we've got no parameters, just keep idling */
497 if (fepriv->state & FESTATE_IDLE) {
498 fepriv->delay = 3 * HZ;
499 fepriv->quality = 0;
500 return;
501 }
502
503 /* in SCAN mode, we just set the frontend when asked and leave it alone */
504 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
505 if (fepriv->state & FESTATE_RETUNE) {
506 tmp = *c;
507 if (fe->ops.set_frontend)
508 retval = fe->ops.set_frontend(fe);
509 *c = tmp;
510 if (retval < 0)
511 fepriv->state = FESTATE_ERROR;
512 else
513 fepriv->state = FESTATE_TUNED;
514 }
515 fepriv->delay = 3 * HZ;
516 fepriv->quality = 0;
517 return;
518 }
519
520 /* get the frontend status */
521 if (fepriv->state & FESTATE_RETUNE) {
522 s = 0;
523 } else {
524 if (fe->ops.read_status)
525 fe->ops.read_status(fe, &s);
526 if (s != fepriv->status) {
527 dvb_frontend_add_event(fe, s);
528 fepriv->status = s;
529 }
530 }
531
532 /* if we're not tuned, and we have a lock, move to the TUNED state */
533 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
534 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
535 fepriv->state = FESTATE_TUNED;
536
537 /* if we're tuned, then we have determined the correct inversion */
538 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
539 (c->inversion == INVERSION_AUTO)) {
540 c->inversion = fepriv->inversion;
541 }
542 return;
543 }
544
545 /* if we are tuned already, check we're still locked */
546 if (fepriv->state & FESTATE_TUNED) {
547 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
548
549 /* we're tuned, and the lock is still good... */
550 if (s & FE_HAS_LOCK) {
551 return;
552 } else { /* if we _WERE_ tuned, but now don't have a lock */
553 fepriv->state = FESTATE_ZIGZAG_FAST;
554 fepriv->started_auto_step = fepriv->auto_step;
555 fepriv->check_wrapped = 0;
556 }
557 }
558
559 /* don't actually do anything if we're in the LOSTLOCK state,
560 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
561 if ((fepriv->state & FESTATE_LOSTLOCK) &&
562 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
563 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
564 return;
565 }
566
567 /* don't do anything if we're in the DISEQC state, since this
568 * might be someone with a motorized dish controlled by DISEQC.
569 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
570 if (fepriv->state & FESTATE_DISEQC) {
571 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
572 return;
573 }
574
575 /* if we're in the RETUNE state, set everything up for a brand
576 * new scan, keeping the current inversion setting, as the next
577 * tune is _very_ likely to require the same */
578 if (fepriv->state & FESTATE_RETUNE) {
579 fepriv->lnb_drift = 0;
580 fepriv->auto_step = 0;
581 fepriv->auto_sub_step = 0;
582 fepriv->started_auto_step = 0;
583 fepriv->check_wrapped = 0;
584 }
585
586 /* fast zigzag. */
587 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
588 fepriv->delay = fepriv->min_delay;
589
590 /* perform a tune */
591 retval = dvb_frontend_swzigzag_autotune(fe,
592 fepriv->check_wrapped);
593 if (retval < 0) {
594 return;
595 } else if (retval) {
596 /* OK, if we've run out of trials at the fast speed.
597 * Drop back to slow for the _next_ attempt */
598 fepriv->state = FESTATE_SEARCHING_SLOW;
599 fepriv->started_auto_step = fepriv->auto_step;
600 return;
601 }
602 fepriv->check_wrapped = 1;
603
604 /* if we've just re-tuned, enter the ZIGZAG_FAST state.
605 * This ensures we cannot return from an
606 * FE_SET_FRONTEND ioctl before the first frontend tune
607 * occurs */
608 if (fepriv->state & FESTATE_RETUNE) {
609 fepriv->state = FESTATE_TUNING_FAST;
610 }
611 }
612
613 /* slow zigzag */
614 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
615 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
616
617 /* Note: don't bother checking for wrapping; we stay in this
618 * state until we get a lock */
619 dvb_frontend_swzigzag_autotune(fe, 0);
620 }
621 }
622
dvb_frontend_is_exiting(struct dvb_frontend * fe)623 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
624 {
625 struct dvb_frontend_private *fepriv = fe->frontend_priv;
626
627 if (fe->exit != DVB_FE_NO_EXIT)
628 return 1;
629
630 if (fepriv->dvbdev->writers == 1)
631 if (time_after_eq(jiffies, fepriv->release_jiffies +
632 dvb_shutdown_timeout * HZ))
633 return 1;
634
635 return 0;
636 }
637
dvb_frontend_should_wakeup(struct dvb_frontend * fe)638 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
639 {
640 struct dvb_frontend_private *fepriv = fe->frontend_priv;
641
642 if (fepriv->wakeup) {
643 fepriv->wakeup = 0;
644 return 1;
645 }
646 return dvb_frontend_is_exiting(fe);
647 }
648
dvb_frontend_wakeup(struct dvb_frontend * fe)649 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
650 {
651 struct dvb_frontend_private *fepriv = fe->frontend_priv;
652
653 fepriv->wakeup = 1;
654 wake_up_interruptible(&fepriv->wait_queue);
655 }
656
dvb_frontend_thread(void * data)657 static int dvb_frontend_thread(void *data)
658 {
659 struct dvb_frontend *fe = data;
660 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
661 struct dvb_frontend_private *fepriv = fe->frontend_priv;
662 enum fe_status s = FE_NONE;
663 enum dvbfe_algo algo;
664 bool re_tune = false;
665 bool semheld = false;
666
667 dev_dbg(fe->dvb->device, "%s:\n", __func__);
668
669 fepriv->check_wrapped = 0;
670 fepriv->quality = 0;
671 fepriv->delay = 3 * HZ;
672 fepriv->status = 0;
673 fepriv->wakeup = 0;
674 fepriv->reinitialise = 0;
675
676 dvb_frontend_init(fe);
677
678 set_freezable();
679 while (1) {
680 up(&fepriv->sem); /* is locked when we enter the thread... */
681 restart:
682 wait_event_interruptible_timeout(fepriv->wait_queue,
683 dvb_frontend_should_wakeup(fe) ||
684 kthread_should_stop() ||
685 freezing(current),
686 fepriv->delay);
687
688 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
689 /* got signal or quitting */
690 if (!down_interruptible(&fepriv->sem))
691 semheld = true;
692 fe->exit = DVB_FE_NORMAL_EXIT;
693 break;
694 }
695
696 if (try_to_freeze())
697 goto restart;
698
699 if (down_interruptible(&fepriv->sem))
700 break;
701
702 if (fepriv->reinitialise) {
703 dvb_frontend_init(fe);
704 if (fe->ops.set_tone && fepriv->tone != -1)
705 fe->ops.set_tone(fe, fepriv->tone);
706 if (fe->ops.set_voltage && fepriv->voltage != -1)
707 fe->ops.set_voltage(fe, fepriv->voltage);
708 fepriv->reinitialise = 0;
709 }
710
711 /* do an iteration of the tuning loop */
712 if (fe->ops.get_frontend_algo) {
713 algo = fe->ops.get_frontend_algo(fe);
714 switch (algo) {
715 case DVBFE_ALGO_HW:
716 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
717
718 if (fepriv->state & FESTATE_RETUNE) {
719 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
720 re_tune = true;
721 fepriv->state = FESTATE_TUNED;
722 } else {
723 re_tune = false;
724 }
725
726 if (fe->ops.tune)
727 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
728
729 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
730 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
731 dvb_frontend_add_event(fe, s);
732 fepriv->status = s;
733 }
734 break;
735 case DVBFE_ALGO_SW:
736 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
737 dvb_frontend_swzigzag(fe);
738 break;
739 case DVBFE_ALGO_CUSTOM:
740 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
741 if (fepriv->state & FESTATE_RETUNE) {
742 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
743 fepriv->state = FESTATE_TUNED;
744 }
745 /* Case where we are going to search for a carrier
746 * User asked us to retune again for some reason, possibly
747 * requesting a search with a new set of parameters
748 */
749 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
750 if (fe->ops.search) {
751 fepriv->algo_status = fe->ops.search(fe);
752 /* We did do a search as was requested, the flags are
753 * now unset as well and has the flags wrt to search.
754 */
755 } else {
756 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
757 }
758 }
759 /* Track the carrier if the search was successful */
760 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
761 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
762 fepriv->delay = HZ / 2;
763 }
764 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
765 fe->ops.read_status(fe, &s);
766 if (s != fepriv->status) {
767 dvb_frontend_add_event(fe, s); /* update event list */
768 fepriv->status = s;
769 if (!(s & FE_HAS_LOCK)) {
770 fepriv->delay = HZ / 10;
771 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
772 } else {
773 fepriv->delay = 60 * HZ;
774 }
775 }
776 break;
777 default:
778 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
779 break;
780 }
781 } else {
782 dvb_frontend_swzigzag(fe);
783 }
784 }
785
786 if (dvb_powerdown_on_sleep) {
787 if (fe->ops.set_voltage)
788 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
789 if (fe->ops.tuner_ops.sleep) {
790 if (fe->ops.i2c_gate_ctrl)
791 fe->ops.i2c_gate_ctrl(fe, 1);
792 fe->ops.tuner_ops.sleep(fe);
793 if (fe->ops.i2c_gate_ctrl)
794 fe->ops.i2c_gate_ctrl(fe, 0);
795 }
796 if (fe->ops.sleep)
797 fe->ops.sleep(fe);
798 }
799
800 fepriv->thread = NULL;
801 if (kthread_should_stop())
802 fe->exit = DVB_FE_DEVICE_REMOVED;
803 else
804 fe->exit = DVB_FE_NO_EXIT;
805 mb();
806
807 if (semheld)
808 up(&fepriv->sem);
809 dvb_frontend_wakeup(fe);
810 return 0;
811 }
812
dvb_frontend_stop(struct dvb_frontend * fe)813 static void dvb_frontend_stop(struct dvb_frontend *fe)
814 {
815 struct dvb_frontend_private *fepriv = fe->frontend_priv;
816
817 dev_dbg(fe->dvb->device, "%s:\n", __func__);
818
819 if (fe->exit != DVB_FE_DEVICE_REMOVED)
820 fe->exit = DVB_FE_NORMAL_EXIT;
821 mb();
822
823 if (!fepriv->thread)
824 return;
825
826 kthread_stop(fepriv->thread);
827
828 sema_init(&fepriv->sem, 1);
829 fepriv->state = FESTATE_IDLE;
830
831 /* paranoia check in case a signal arrived */
832 if (fepriv->thread)
833 dev_warn(fe->dvb->device,
834 "dvb_frontend_stop: warning: thread %p won't exit\n",
835 fepriv->thread);
836 }
837
838 /*
839 * Sleep for the amount of time given by add_usec parameter
840 *
841 * This needs to be as precise as possible, as it affects the detection of
842 * the dish tone command at the satellite subsystem. The precision is improved
843 * by using a scheduled msleep followed by udelay for the remainder.
844 */
dvb_frontend_sleep_until(ktime_t * waketime,u32 add_usec)845 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
846 {
847 s32 delta;
848
849 *waketime = ktime_add_us(*waketime, add_usec);
850 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
851 if (delta > 2500) {
852 msleep((delta - 1500) / 1000);
853 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
854 }
855 if (delta > 0)
856 udelay(delta);
857 }
858 EXPORT_SYMBOL(dvb_frontend_sleep_until);
859
dvb_frontend_start(struct dvb_frontend * fe)860 static int dvb_frontend_start(struct dvb_frontend *fe)
861 {
862 int ret;
863 struct dvb_frontend_private *fepriv = fe->frontend_priv;
864 struct task_struct *fe_thread;
865
866 dev_dbg(fe->dvb->device, "%s:\n", __func__);
867
868 if (fepriv->thread) {
869 if (fe->exit == DVB_FE_NO_EXIT)
870 return 0;
871 else
872 dvb_frontend_stop(fe);
873 }
874
875 if (signal_pending(current))
876 return -EINTR;
877 if (down_interruptible(&fepriv->sem))
878 return -EINTR;
879
880 fepriv->state = FESTATE_IDLE;
881 fe->exit = DVB_FE_NO_EXIT;
882 fepriv->thread = NULL;
883 mb();
884
885 fe_thread = kthread_run(dvb_frontend_thread, fe,
886 "kdvb-ad-%i-fe-%i", fe->dvb->num, fe->id);
887 if (IS_ERR(fe_thread)) {
888 ret = PTR_ERR(fe_thread);
889 dev_warn(fe->dvb->device,
890 "dvb_frontend_start: failed to start kthread (%d)\n",
891 ret);
892 up(&fepriv->sem);
893 return ret;
894 }
895 fepriv->thread = fe_thread;
896 return 0;
897 }
898
dvb_frontend_get_frequency_limits(struct dvb_frontend * fe,u32 * freq_min,u32 * freq_max,u32 * tolerance)899 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
900 u32 *freq_min, u32 *freq_max,
901 u32 *tolerance)
902 {
903 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
904 u32 tuner_min = fe->ops.tuner_ops.info.frequency_min_hz;
905 u32 tuner_max = fe->ops.tuner_ops.info.frequency_max_hz;
906 u32 frontend_min = fe->ops.info.frequency_min_hz;
907 u32 frontend_max = fe->ops.info.frequency_max_hz;
908
909 *freq_min = max(frontend_min, tuner_min);
910
911 if (frontend_max == 0)
912 *freq_max = tuner_max;
913 else if (tuner_max == 0)
914 *freq_max = frontend_max;
915 else
916 *freq_max = min(frontend_max, tuner_max);
917
918 if (*freq_min == 0 || *freq_max == 0)
919 dev_warn(fe->dvb->device,
920 "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
921 fe->dvb->num, fe->id);
922
923 /* If the standard is for satellite, convert frequencies to kHz */
924 switch (c->delivery_system) {
925 case SYS_DVBS:
926 case SYS_DVBS2:
927 case SYS_TURBO:
928 case SYS_ISDBS:
929 *freq_min /= kHz;
930 *freq_max /= kHz;
931 if (tolerance)
932 *tolerance = fe->ops.info.frequency_tolerance_hz / kHz;
933
934 break;
935 default:
936 if (tolerance)
937 *tolerance = fe->ops.info.frequency_tolerance_hz;
938 break;
939 }
940 }
941
dvb_frontend_get_stepsize(struct dvb_frontend * fe)942 static u32 dvb_frontend_get_stepsize(struct dvb_frontend *fe)
943 {
944 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
945 u32 fe_step = fe->ops.info.frequency_stepsize_hz;
946 u32 tuner_step = fe->ops.tuner_ops.info.frequency_step_hz;
947 u32 step = max(fe_step, tuner_step);
948
949 switch (c->delivery_system) {
950 case SYS_DVBS:
951 case SYS_DVBS2:
952 case SYS_TURBO:
953 case SYS_ISDBS:
954 step /= kHz;
955 break;
956 default:
957 break;
958 }
959
960 return step;
961 }
962
dvb_frontend_check_parameters(struct dvb_frontend * fe)963 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
964 {
965 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
966 u32 freq_min;
967 u32 freq_max;
968
969 /* range check: frequency */
970 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max, NULL);
971 if ((freq_min && c->frequency < freq_min) ||
972 (freq_max && c->frequency > freq_max)) {
973 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
974 fe->dvb->num, fe->id, c->frequency,
975 freq_min, freq_max);
976 return -EINVAL;
977 }
978
979 /* range check: symbol rate */
980 switch (c->delivery_system) {
981 case SYS_DVBS:
982 case SYS_DVBS2:
983 case SYS_TURBO:
984 case SYS_DVBC_ANNEX_A:
985 case SYS_DVBC_ANNEX_C:
986 if ((fe->ops.info.symbol_rate_min &&
987 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
988 (fe->ops.info.symbol_rate_max &&
989 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
990 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
991 fe->dvb->num, fe->id, c->symbol_rate,
992 fe->ops.info.symbol_rate_min,
993 fe->ops.info.symbol_rate_max);
994 return -EINVAL;
995 }
996 default:
997 break;
998 }
999
1000 return 0;
1001 }
1002
dvb_frontend_clear_cache(struct dvb_frontend * fe)1003 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
1004 {
1005 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1006 int i;
1007 u32 delsys;
1008
1009 delsys = c->delivery_system;
1010 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
1011 c->delivery_system = delsys;
1012
1013 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1014 __func__, c->delivery_system);
1015
1016 c->transmission_mode = TRANSMISSION_MODE_AUTO;
1017 c->bandwidth_hz = 0; /* AUTO */
1018 c->guard_interval = GUARD_INTERVAL_AUTO;
1019 c->hierarchy = HIERARCHY_AUTO;
1020 c->symbol_rate = 0;
1021 c->code_rate_HP = FEC_AUTO;
1022 c->code_rate_LP = FEC_AUTO;
1023 c->fec_inner = FEC_AUTO;
1024 c->rolloff = ROLLOFF_AUTO;
1025 c->voltage = SEC_VOLTAGE_OFF;
1026 c->sectone = SEC_TONE_OFF;
1027 c->pilot = PILOT_AUTO;
1028
1029 c->isdbt_partial_reception = 0;
1030 c->isdbt_sb_mode = 0;
1031 c->isdbt_sb_subchannel = 0;
1032 c->isdbt_sb_segment_idx = 0;
1033 c->isdbt_sb_segment_count = 0;
1034 c->isdbt_layer_enabled = 7; /* All layers (A,B,C) */
1035 for (i = 0; i < 3; i++) {
1036 c->layer[i].fec = FEC_AUTO;
1037 c->layer[i].modulation = QAM_AUTO;
1038 c->layer[i].interleaving = 0;
1039 c->layer[i].segment_count = 0;
1040 }
1041
1042 c->stream_id = NO_STREAM_ID_FILTER;
1043 c->scrambling_sequence_index = 0;/* default sequence */
1044
1045 switch (c->delivery_system) {
1046 case SYS_DVBS:
1047 case SYS_DVBS2:
1048 case SYS_TURBO:
1049 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1050 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1051 break;
1052 case SYS_ATSC:
1053 c->modulation = VSB_8;
1054 break;
1055 case SYS_ISDBS:
1056 c->symbol_rate = 28860000;
1057 c->rolloff = ROLLOFF_35;
1058 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1059 break;
1060 default:
1061 c->modulation = QAM_AUTO;
1062 break;
1063 }
1064
1065 c->lna = LNA_AUTO;
1066
1067 return 0;
1068 }
1069
1070 #define _DTV_CMD(n, s, b) \
1071 [n] = { \
1072 .name = #n, \
1073 .cmd = n, \
1074 .set = s,\
1075 .buffer = b \
1076 }
1077
1078 struct dtv_cmds_h {
1079 char *name; /* A display name for debugging purposes */
1080
1081 __u32 cmd; /* A unique ID */
1082
1083 /* Flags */
1084 __u32 set:1; /* Either a set or get property */
1085 __u32 buffer:1; /* Does this property use the buffer? */
1086 __u32 reserved:30; /* Align */
1087 };
1088
1089 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1090 _DTV_CMD(DTV_TUNE, 1, 0),
1091 _DTV_CMD(DTV_CLEAR, 1, 0),
1092
1093 /* Set */
1094 _DTV_CMD(DTV_FREQUENCY, 1, 0),
1095 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1096 _DTV_CMD(DTV_MODULATION, 1, 0),
1097 _DTV_CMD(DTV_INVERSION, 1, 0),
1098 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1099 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1100 _DTV_CMD(DTV_INNER_FEC, 1, 0),
1101 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1102 _DTV_CMD(DTV_TONE, 1, 0),
1103 _DTV_CMD(DTV_PILOT, 1, 0),
1104 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1105 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1106 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1107 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1108 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1109 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1110 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1111 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1112
1113 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1114 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1115 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1116 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1117 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1118 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1119 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1120 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1121 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1122 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1123 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1124 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1125 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1126 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1127 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1128 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1129 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1130 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1131
1132 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1133 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1134 _DTV_CMD(DTV_SCRAMBLING_SEQUENCE_INDEX, 1, 0),
1135 _DTV_CMD(DTV_LNA, 1, 0),
1136
1137 /* Get */
1138 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1139 _DTV_CMD(DTV_API_VERSION, 0, 0),
1140
1141 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1142
1143 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1144 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1145
1146 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1147 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1148 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1149 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1150 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1151 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1152 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1153 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1154 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1155 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1156 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1157 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1158 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1159
1160 /* Statistics API */
1161 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1162 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1163 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1164 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1165 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1166 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1167 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1168 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1169 };
1170
1171 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1172 * drivers can use a single set_frontend tuning function, regardless of whether
1173 * it's being used for the legacy or new API, reducing code and complexity.
1174 */
dtv_property_cache_sync(struct dvb_frontend * fe,struct dtv_frontend_properties * c,const struct dvb_frontend_parameters * p)1175 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1176 struct dtv_frontend_properties *c,
1177 const struct dvb_frontend_parameters *p)
1178 {
1179 c->frequency = p->frequency;
1180 c->inversion = p->inversion;
1181
1182 switch (dvbv3_type(c->delivery_system)) {
1183 case DVBV3_QPSK:
1184 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1185 c->symbol_rate = p->u.qpsk.symbol_rate;
1186 c->fec_inner = p->u.qpsk.fec_inner;
1187 break;
1188 case DVBV3_QAM:
1189 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1190 c->symbol_rate = p->u.qam.symbol_rate;
1191 c->fec_inner = p->u.qam.fec_inner;
1192 c->modulation = p->u.qam.modulation;
1193 break;
1194 case DVBV3_OFDM:
1195 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1196
1197 switch (p->u.ofdm.bandwidth) {
1198 case BANDWIDTH_10_MHZ:
1199 c->bandwidth_hz = 10000000;
1200 break;
1201 case BANDWIDTH_8_MHZ:
1202 c->bandwidth_hz = 8000000;
1203 break;
1204 case BANDWIDTH_7_MHZ:
1205 c->bandwidth_hz = 7000000;
1206 break;
1207 case BANDWIDTH_6_MHZ:
1208 c->bandwidth_hz = 6000000;
1209 break;
1210 case BANDWIDTH_5_MHZ:
1211 c->bandwidth_hz = 5000000;
1212 break;
1213 case BANDWIDTH_1_712_MHZ:
1214 c->bandwidth_hz = 1712000;
1215 break;
1216 case BANDWIDTH_AUTO:
1217 c->bandwidth_hz = 0;
1218 }
1219
1220 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1221 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1222 c->modulation = p->u.ofdm.constellation;
1223 c->transmission_mode = p->u.ofdm.transmission_mode;
1224 c->guard_interval = p->u.ofdm.guard_interval;
1225 c->hierarchy = p->u.ofdm.hierarchy_information;
1226 break;
1227 case DVBV3_ATSC:
1228 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1229 c->modulation = p->u.vsb.modulation;
1230 if (c->delivery_system == SYS_ATSCMH)
1231 break;
1232 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1233 c->delivery_system = SYS_ATSC;
1234 else
1235 c->delivery_system = SYS_DVBC_ANNEX_B;
1236 break;
1237 case DVBV3_UNKNOWN:
1238 dev_err(fe->dvb->device,
1239 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1240 __func__, c->delivery_system);
1241 return -EINVAL;
1242 }
1243
1244 return 0;
1245 }
1246
1247 /* Ensure the cached values are set correctly in the frontend
1248 * legacy tuning structures, for the advanced tuning API.
1249 */
1250 static int
dtv_property_legacy_params_sync(struct dvb_frontend * fe,const struct dtv_frontend_properties * c,struct dvb_frontend_parameters * p)1251 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1252 const struct dtv_frontend_properties *c,
1253 struct dvb_frontend_parameters *p)
1254 {
1255 p->frequency = c->frequency;
1256 p->inversion = c->inversion;
1257
1258 switch (dvbv3_type(c->delivery_system)) {
1259 case DVBV3_UNKNOWN:
1260 dev_err(fe->dvb->device,
1261 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1262 __func__, c->delivery_system);
1263 return -EINVAL;
1264 case DVBV3_QPSK:
1265 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1266 p->u.qpsk.symbol_rate = c->symbol_rate;
1267 p->u.qpsk.fec_inner = c->fec_inner;
1268 break;
1269 case DVBV3_QAM:
1270 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1271 p->u.qam.symbol_rate = c->symbol_rate;
1272 p->u.qam.fec_inner = c->fec_inner;
1273 p->u.qam.modulation = c->modulation;
1274 break;
1275 case DVBV3_OFDM:
1276 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1277 switch (c->bandwidth_hz) {
1278 case 10000000:
1279 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1280 break;
1281 case 8000000:
1282 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1283 break;
1284 case 7000000:
1285 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1286 break;
1287 case 6000000:
1288 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1289 break;
1290 case 5000000:
1291 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1292 break;
1293 case 1712000:
1294 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1295 break;
1296 case 0:
1297 default:
1298 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1299 }
1300 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1301 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1302 p->u.ofdm.constellation = c->modulation;
1303 p->u.ofdm.transmission_mode = c->transmission_mode;
1304 p->u.ofdm.guard_interval = c->guard_interval;
1305 p->u.ofdm.hierarchy_information = c->hierarchy;
1306 break;
1307 case DVBV3_ATSC:
1308 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1309 p->u.vsb.modulation = c->modulation;
1310 break;
1311 }
1312 return 0;
1313 }
1314
1315 /**
1316 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1317 * @fe: struct dvb_frontend pointer
1318 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1319 * @p_out: struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1320 *
1321 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1322 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1323 * If p_out is not null, it will update the DVBv3 params pointed by it.
1324 */
dtv_get_frontend(struct dvb_frontend * fe,struct dtv_frontend_properties * c,struct dvb_frontend_parameters * p_out)1325 static int dtv_get_frontend(struct dvb_frontend *fe,
1326 struct dtv_frontend_properties *c,
1327 struct dvb_frontend_parameters *p_out)
1328 {
1329 int r;
1330
1331 if (fe->ops.get_frontend) {
1332 r = fe->ops.get_frontend(fe, c);
1333 if (unlikely(r < 0))
1334 return r;
1335 if (p_out)
1336 dtv_property_legacy_params_sync(fe, c, p_out);
1337 return 0;
1338 }
1339
1340 /* As everything is in cache, get_frontend fops are always supported */
1341 return 0;
1342 }
1343
1344 static int dvb_frontend_handle_ioctl(struct file *file,
1345 unsigned int cmd, void *parg);
1346
dtv_property_process_get(struct dvb_frontend * fe,const struct dtv_frontend_properties * c,struct dtv_property * tvp,struct file * file)1347 static int dtv_property_process_get(struct dvb_frontend *fe,
1348 const struct dtv_frontend_properties *c,
1349 struct dtv_property *tvp,
1350 struct file *file)
1351 {
1352 int ncaps;
1353
1354 switch (tvp->cmd) {
1355 case DTV_ENUM_DELSYS:
1356 ncaps = 0;
1357 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1358 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1359 ncaps++;
1360 }
1361 tvp->u.buffer.len = ncaps;
1362 break;
1363 case DTV_FREQUENCY:
1364 tvp->u.data = c->frequency;
1365 break;
1366 case DTV_MODULATION:
1367 tvp->u.data = c->modulation;
1368 break;
1369 case DTV_BANDWIDTH_HZ:
1370 tvp->u.data = c->bandwidth_hz;
1371 break;
1372 case DTV_INVERSION:
1373 tvp->u.data = c->inversion;
1374 break;
1375 case DTV_SYMBOL_RATE:
1376 tvp->u.data = c->symbol_rate;
1377 break;
1378 case DTV_INNER_FEC:
1379 tvp->u.data = c->fec_inner;
1380 break;
1381 case DTV_PILOT:
1382 tvp->u.data = c->pilot;
1383 break;
1384 case DTV_ROLLOFF:
1385 tvp->u.data = c->rolloff;
1386 break;
1387 case DTV_DELIVERY_SYSTEM:
1388 tvp->u.data = c->delivery_system;
1389 break;
1390 case DTV_VOLTAGE:
1391 tvp->u.data = c->voltage;
1392 break;
1393 case DTV_TONE:
1394 tvp->u.data = c->sectone;
1395 break;
1396 case DTV_API_VERSION:
1397 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1398 break;
1399 case DTV_CODE_RATE_HP:
1400 tvp->u.data = c->code_rate_HP;
1401 break;
1402 case DTV_CODE_RATE_LP:
1403 tvp->u.data = c->code_rate_LP;
1404 break;
1405 case DTV_GUARD_INTERVAL:
1406 tvp->u.data = c->guard_interval;
1407 break;
1408 case DTV_TRANSMISSION_MODE:
1409 tvp->u.data = c->transmission_mode;
1410 break;
1411 case DTV_HIERARCHY:
1412 tvp->u.data = c->hierarchy;
1413 break;
1414 case DTV_INTERLEAVING:
1415 tvp->u.data = c->interleaving;
1416 break;
1417
1418 /* ISDB-T Support here */
1419 case DTV_ISDBT_PARTIAL_RECEPTION:
1420 tvp->u.data = c->isdbt_partial_reception;
1421 break;
1422 case DTV_ISDBT_SOUND_BROADCASTING:
1423 tvp->u.data = c->isdbt_sb_mode;
1424 break;
1425 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1426 tvp->u.data = c->isdbt_sb_subchannel;
1427 break;
1428 case DTV_ISDBT_SB_SEGMENT_IDX:
1429 tvp->u.data = c->isdbt_sb_segment_idx;
1430 break;
1431 case DTV_ISDBT_SB_SEGMENT_COUNT:
1432 tvp->u.data = c->isdbt_sb_segment_count;
1433 break;
1434 case DTV_ISDBT_LAYER_ENABLED:
1435 tvp->u.data = c->isdbt_layer_enabled;
1436 break;
1437 case DTV_ISDBT_LAYERA_FEC:
1438 tvp->u.data = c->layer[0].fec;
1439 break;
1440 case DTV_ISDBT_LAYERA_MODULATION:
1441 tvp->u.data = c->layer[0].modulation;
1442 break;
1443 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1444 tvp->u.data = c->layer[0].segment_count;
1445 break;
1446 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1447 tvp->u.data = c->layer[0].interleaving;
1448 break;
1449 case DTV_ISDBT_LAYERB_FEC:
1450 tvp->u.data = c->layer[1].fec;
1451 break;
1452 case DTV_ISDBT_LAYERB_MODULATION:
1453 tvp->u.data = c->layer[1].modulation;
1454 break;
1455 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1456 tvp->u.data = c->layer[1].segment_count;
1457 break;
1458 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1459 tvp->u.data = c->layer[1].interleaving;
1460 break;
1461 case DTV_ISDBT_LAYERC_FEC:
1462 tvp->u.data = c->layer[2].fec;
1463 break;
1464 case DTV_ISDBT_LAYERC_MODULATION:
1465 tvp->u.data = c->layer[2].modulation;
1466 break;
1467 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1468 tvp->u.data = c->layer[2].segment_count;
1469 break;
1470 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1471 tvp->u.data = c->layer[2].interleaving;
1472 break;
1473
1474 /* Multistream support */
1475 case DTV_STREAM_ID:
1476 case DTV_DVBT2_PLP_ID_LEGACY:
1477 tvp->u.data = c->stream_id;
1478 break;
1479
1480 /* Physical layer scrambling support */
1481 case DTV_SCRAMBLING_SEQUENCE_INDEX:
1482 tvp->u.data = c->scrambling_sequence_index;
1483 break;
1484
1485 /* ATSC-MH */
1486 case DTV_ATSCMH_FIC_VER:
1487 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1488 break;
1489 case DTV_ATSCMH_PARADE_ID:
1490 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1491 break;
1492 case DTV_ATSCMH_NOG:
1493 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1494 break;
1495 case DTV_ATSCMH_TNOG:
1496 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1497 break;
1498 case DTV_ATSCMH_SGN:
1499 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1500 break;
1501 case DTV_ATSCMH_PRC:
1502 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1503 break;
1504 case DTV_ATSCMH_RS_FRAME_MODE:
1505 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1506 break;
1507 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1508 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1509 break;
1510 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1511 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1512 break;
1513 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1514 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1515 break;
1516 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1517 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1518 break;
1519 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1520 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1521 break;
1522 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1523 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1524 break;
1525 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1526 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1527 break;
1528 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1529 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1530 break;
1531
1532 case DTV_LNA:
1533 tvp->u.data = c->lna;
1534 break;
1535
1536 /* Fill quality measures */
1537 case DTV_STAT_SIGNAL_STRENGTH:
1538 tvp->u.st = c->strength;
1539 break;
1540 case DTV_STAT_CNR:
1541 tvp->u.st = c->cnr;
1542 break;
1543 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1544 tvp->u.st = c->pre_bit_error;
1545 break;
1546 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1547 tvp->u.st = c->pre_bit_count;
1548 break;
1549 case DTV_STAT_POST_ERROR_BIT_COUNT:
1550 tvp->u.st = c->post_bit_error;
1551 break;
1552 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1553 tvp->u.st = c->post_bit_count;
1554 break;
1555 case DTV_STAT_ERROR_BLOCK_COUNT:
1556 tvp->u.st = c->block_error;
1557 break;
1558 case DTV_STAT_TOTAL_BLOCK_COUNT:
1559 tvp->u.st = c->block_count;
1560 break;
1561 default:
1562 dev_dbg(fe->dvb->device,
1563 "%s: FE property %d doesn't exist\n",
1564 __func__, tvp->cmd);
1565 return -EINVAL;
1566 }
1567
1568 if (!dtv_cmds[tvp->cmd].buffer)
1569 dev_dbg(fe->dvb->device,
1570 "%s: GET cmd 0x%08x (%s) = 0x%08x\n",
1571 __func__, tvp->cmd, dtv_cmds[tvp->cmd].name,
1572 tvp->u.data);
1573 else
1574 dev_dbg(fe->dvb->device,
1575 "%s: GET cmd 0x%08x (%s) len %d: %*ph\n",
1576 __func__,
1577 tvp->cmd, dtv_cmds[tvp->cmd].name,
1578 tvp->u.buffer.len,
1579 tvp->u.buffer.len, tvp->u.buffer.data);
1580
1581 return 0;
1582 }
1583
1584 static int dtv_set_frontend(struct dvb_frontend *fe);
1585
is_dvbv3_delsys(u32 delsys)1586 static bool is_dvbv3_delsys(u32 delsys)
1587 {
1588 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1589 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1590 }
1591
1592 /**
1593 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1594 * @fe: struct frontend;
1595 * @delsys: DVBv5 type that will be used for emulation
1596 *
1597 * Provides emulation for delivery systems that are compatible with the old
1598 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1599 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1600 * parameters are compatible with DVB-S spec.
1601 */
emulate_delivery_system(struct dvb_frontend * fe,u32 delsys)1602 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1603 {
1604 int i;
1605 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1606
1607 c->delivery_system = delsys;
1608
1609 /*
1610 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1611 */
1612 if (c->delivery_system == SYS_ISDBT) {
1613 dev_dbg(fe->dvb->device,
1614 "%s: Using defaults for SYS_ISDBT\n",
1615 __func__);
1616
1617 if (!c->bandwidth_hz)
1618 c->bandwidth_hz = 6000000;
1619
1620 c->isdbt_partial_reception = 0;
1621 c->isdbt_sb_mode = 0;
1622 c->isdbt_sb_subchannel = 0;
1623 c->isdbt_sb_segment_idx = 0;
1624 c->isdbt_sb_segment_count = 0;
1625 c->isdbt_layer_enabled = 7;
1626 for (i = 0; i < 3; i++) {
1627 c->layer[i].fec = FEC_AUTO;
1628 c->layer[i].modulation = QAM_AUTO;
1629 c->layer[i].interleaving = 0;
1630 c->layer[i].segment_count = 0;
1631 }
1632 }
1633 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1634 __func__, c->delivery_system);
1635
1636 return 0;
1637 }
1638
1639 /**
1640 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1641 * @fe: frontend struct
1642 * @desired_system: delivery system requested by the user
1643 *
1644 * A DVBv5 call know what's the desired system it wants. So, set it.
1645 *
1646 * There are, however, a few known issues with early DVBv5 applications that
1647 * are also handled by this logic:
1648 *
1649 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1650 * This is an API violation, but, as we don't want to break userspace,
1651 * convert it to the first supported delivery system.
1652 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1653 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1654 * ISDB-T provided backward compat with DVB-T.
1655 */
dvbv5_set_delivery_system(struct dvb_frontend * fe,u32 desired_system)1656 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1657 u32 desired_system)
1658 {
1659 int ncaps;
1660 u32 delsys = SYS_UNDEFINED;
1661 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1662 enum dvbv3_emulation_type type;
1663
1664 /*
1665 * It was reported that some old DVBv5 applications were
1666 * filling delivery_system with SYS_UNDEFINED. If this happens,
1667 * assume that the application wants to use the first supported
1668 * delivery system.
1669 */
1670 if (desired_system == SYS_UNDEFINED)
1671 desired_system = fe->ops.delsys[0];
1672
1673 /*
1674 * This is a DVBv5 call. So, it likely knows the supported
1675 * delivery systems. So, check if the desired delivery system is
1676 * supported
1677 */
1678 ncaps = 0;
1679 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1680 if (fe->ops.delsys[ncaps] == desired_system) {
1681 c->delivery_system = desired_system;
1682 dev_dbg(fe->dvb->device,
1683 "%s: Changing delivery system to %d\n",
1684 __func__, desired_system);
1685 return 0;
1686 }
1687 ncaps++;
1688 }
1689
1690 /*
1691 * The requested delivery system isn't supported. Maybe userspace
1692 * is requesting a DVBv3 compatible delivery system.
1693 *
1694 * The emulation only works if the desired system is one of the
1695 * delivery systems supported by DVBv3 API
1696 */
1697 if (!is_dvbv3_delsys(desired_system)) {
1698 dev_dbg(fe->dvb->device,
1699 "%s: Delivery system %d not supported.\n",
1700 __func__, desired_system);
1701 return -EINVAL;
1702 }
1703
1704 type = dvbv3_type(desired_system);
1705
1706 /*
1707 * Get the last non-DVBv3 delivery system that has the same type
1708 * of the desired system
1709 */
1710 ncaps = 0;
1711 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1712 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1713 delsys = fe->ops.delsys[ncaps];
1714 ncaps++;
1715 }
1716
1717 /* There's nothing compatible with the desired delivery system */
1718 if (delsys == SYS_UNDEFINED) {
1719 dev_dbg(fe->dvb->device,
1720 "%s: Delivery system %d not supported on emulation mode.\n",
1721 __func__, desired_system);
1722 return -EINVAL;
1723 }
1724
1725 dev_dbg(fe->dvb->device,
1726 "%s: Using delivery system %d emulated as if it were %d\n",
1727 __func__, delsys, desired_system);
1728
1729 return emulate_delivery_system(fe, desired_system);
1730 }
1731
1732 /**
1733 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1734 * @fe: frontend struct
1735 *
1736 * A DVBv3 call doesn't know what's the desired system it wants. It also
1737 * doesn't allow to switch between different types. Due to that, userspace
1738 * should use DVBv5 instead.
1739 * However, in order to avoid breaking userspace API, limited backward
1740 * compatibility support is provided.
1741 *
1742 * There are some delivery systems that are incompatible with DVBv3 calls.
1743 *
1744 * This routine should work fine for frontends that support just one delivery
1745 * system.
1746 *
1747 * For frontends that support multiple frontends:
1748 * 1) It defaults to use the first supported delivery system. There's an
1749 * userspace application that allows changing it at runtime;
1750 *
1751 * 2) If the current delivery system is not compatible with DVBv3, it gets
1752 * the first one that it is compatible.
1753 *
1754 * NOTE: in order for this to work with applications like Kaffeine that
1755 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1756 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1757 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1758 * to DVB-S.
1759 */
dvbv3_set_delivery_system(struct dvb_frontend * fe)1760 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1761 {
1762 int ncaps;
1763 u32 delsys = SYS_UNDEFINED;
1764 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1765
1766 /* If not set yet, defaults to the first supported delivery system */
1767 if (c->delivery_system == SYS_UNDEFINED)
1768 c->delivery_system = fe->ops.delsys[0];
1769
1770 /*
1771 * Trivial case: just use the current one, if it already a DVBv3
1772 * delivery system
1773 */
1774 if (is_dvbv3_delsys(c->delivery_system)) {
1775 dev_dbg(fe->dvb->device,
1776 "%s: Using delivery system to %d\n",
1777 __func__, c->delivery_system);
1778 return 0;
1779 }
1780
1781 /*
1782 * Seek for the first delivery system that it is compatible with a
1783 * DVBv3 standard
1784 */
1785 ncaps = 0;
1786 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1787 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1788 delsys = fe->ops.delsys[ncaps];
1789 break;
1790 }
1791 ncaps++;
1792 }
1793 if (delsys == SYS_UNDEFINED) {
1794 dev_dbg(fe->dvb->device,
1795 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1796 __func__);
1797 return -EINVAL;
1798 }
1799 return emulate_delivery_system(fe, delsys);
1800 }
1801
1802 /**
1803 * dtv_property_process_set - Sets a single DTV property
1804 * @fe: Pointer to &struct dvb_frontend
1805 * @file: Pointer to &struct file
1806 * @cmd: Digital TV command
1807 * @data: An unsigned 32-bits number
1808 *
1809 * This routine assigns the property
1810 * value to the corresponding member of
1811 * &struct dtv_frontend_properties
1812 *
1813 * Returns:
1814 * Zero on success, negative errno on failure.
1815 */
dtv_property_process_set(struct dvb_frontend * fe,struct file * file,u32 cmd,u32 data)1816 static int dtv_property_process_set(struct dvb_frontend *fe,
1817 struct file *file,
1818 u32 cmd, u32 data)
1819 {
1820 int r = 0;
1821 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1822
1823 /** Dump DTV command name and value*/
1824 if (!cmd || cmd > DTV_MAX_COMMAND)
1825 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n",
1826 __func__, cmd);
1827 else
1828 dev_dbg(fe->dvb->device,
1829 "%s: SET cmd 0x%08x (%s) to 0x%08x\n",
1830 __func__, cmd, dtv_cmds[cmd].name, data);
1831 switch (cmd) {
1832 case DTV_CLEAR:
1833 /*
1834 * Reset a cache of data specific to the frontend here. This does
1835 * not effect hardware.
1836 */
1837 dvb_frontend_clear_cache(fe);
1838 break;
1839 case DTV_TUNE:
1840 /*
1841 * Use the cached Digital TV properties to tune the
1842 * frontend
1843 */
1844 dev_dbg(fe->dvb->device,
1845 "%s: Setting the frontend from property cache\n",
1846 __func__);
1847
1848 r = dtv_set_frontend(fe);
1849 break;
1850 case DTV_FREQUENCY:
1851 c->frequency = data;
1852 break;
1853 case DTV_MODULATION:
1854 c->modulation = data;
1855 break;
1856 case DTV_BANDWIDTH_HZ:
1857 c->bandwidth_hz = data;
1858 break;
1859 case DTV_INVERSION:
1860 c->inversion = data;
1861 break;
1862 case DTV_SYMBOL_RATE:
1863 c->symbol_rate = data;
1864 break;
1865 case DTV_INNER_FEC:
1866 c->fec_inner = data;
1867 break;
1868 case DTV_PILOT:
1869 c->pilot = data;
1870 break;
1871 case DTV_ROLLOFF:
1872 c->rolloff = data;
1873 break;
1874 case DTV_DELIVERY_SYSTEM:
1875 r = dvbv5_set_delivery_system(fe, data);
1876 break;
1877 case DTV_VOLTAGE:
1878 c->voltage = data;
1879 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
1880 (void *)c->voltage);
1881 break;
1882 case DTV_TONE:
1883 c->sectone = data;
1884 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
1885 (void *)c->sectone);
1886 break;
1887 case DTV_CODE_RATE_HP:
1888 c->code_rate_HP = data;
1889 break;
1890 case DTV_CODE_RATE_LP:
1891 c->code_rate_LP = data;
1892 break;
1893 case DTV_GUARD_INTERVAL:
1894 c->guard_interval = data;
1895 break;
1896 case DTV_TRANSMISSION_MODE:
1897 c->transmission_mode = data;
1898 break;
1899 case DTV_HIERARCHY:
1900 c->hierarchy = data;
1901 break;
1902 case DTV_INTERLEAVING:
1903 c->interleaving = data;
1904 break;
1905
1906 /* ISDB-T Support here */
1907 case DTV_ISDBT_PARTIAL_RECEPTION:
1908 c->isdbt_partial_reception = data;
1909 break;
1910 case DTV_ISDBT_SOUND_BROADCASTING:
1911 c->isdbt_sb_mode = data;
1912 break;
1913 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1914 c->isdbt_sb_subchannel = data;
1915 break;
1916 case DTV_ISDBT_SB_SEGMENT_IDX:
1917 c->isdbt_sb_segment_idx = data;
1918 break;
1919 case DTV_ISDBT_SB_SEGMENT_COUNT:
1920 c->isdbt_sb_segment_count = data;
1921 break;
1922 case DTV_ISDBT_LAYER_ENABLED:
1923 c->isdbt_layer_enabled = data;
1924 break;
1925 case DTV_ISDBT_LAYERA_FEC:
1926 c->layer[0].fec = data;
1927 break;
1928 case DTV_ISDBT_LAYERA_MODULATION:
1929 c->layer[0].modulation = data;
1930 break;
1931 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1932 c->layer[0].segment_count = data;
1933 break;
1934 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1935 c->layer[0].interleaving = data;
1936 break;
1937 case DTV_ISDBT_LAYERB_FEC:
1938 c->layer[1].fec = data;
1939 break;
1940 case DTV_ISDBT_LAYERB_MODULATION:
1941 c->layer[1].modulation = data;
1942 break;
1943 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1944 c->layer[1].segment_count = data;
1945 break;
1946 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1947 c->layer[1].interleaving = data;
1948 break;
1949 case DTV_ISDBT_LAYERC_FEC:
1950 c->layer[2].fec = data;
1951 break;
1952 case DTV_ISDBT_LAYERC_MODULATION:
1953 c->layer[2].modulation = data;
1954 break;
1955 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1956 c->layer[2].segment_count = data;
1957 break;
1958 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1959 c->layer[2].interleaving = data;
1960 break;
1961
1962 /* Multistream support */
1963 case DTV_STREAM_ID:
1964 case DTV_DVBT2_PLP_ID_LEGACY:
1965 c->stream_id = data;
1966 break;
1967
1968 /* Physical layer scrambling support */
1969 case DTV_SCRAMBLING_SEQUENCE_INDEX:
1970 c->scrambling_sequence_index = data;
1971 break;
1972
1973 /* ATSC-MH */
1974 case DTV_ATSCMH_PARADE_ID:
1975 fe->dtv_property_cache.atscmh_parade_id = data;
1976 break;
1977 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1978 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data;
1979 break;
1980
1981 case DTV_LNA:
1982 c->lna = data;
1983 if (fe->ops.set_lna)
1984 r = fe->ops.set_lna(fe);
1985 if (r < 0)
1986 c->lna = LNA_AUTO;
1987 break;
1988
1989 default:
1990 return -EINVAL;
1991 }
1992
1993 return r;
1994 }
1995
dvb_frontend_do_ioctl(struct file * file,unsigned int cmd,void * parg)1996 static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd,
1997 void *parg)
1998 {
1999 struct dvb_device *dvbdev = file->private_data;
2000 struct dvb_frontend *fe = dvbdev->priv;
2001 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2002 int err;
2003
2004 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
2005 if (down_interruptible(&fepriv->sem))
2006 return -ERESTARTSYS;
2007
2008 if (fe->exit != DVB_FE_NO_EXIT) {
2009 up(&fepriv->sem);
2010 return -ENODEV;
2011 }
2012
2013 /*
2014 * If the frontend is opened in read-only mode, only the ioctls
2015 * that don't interfere with the tune logic should be accepted.
2016 * That allows an external application to monitor the DVB QoS and
2017 * statistics parameters.
2018 *
2019 * That matches all _IOR() ioctls, except for two special cases:
2020 * - FE_GET_EVENT is part of the tuning logic on a DVB application;
2021 * - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0
2022 * setup
2023 * So, those two ioctls should also return -EPERM, as otherwise
2024 * reading from them would interfere with a DVB tune application
2025 */
2026 if ((file->f_flags & O_ACCMODE) == O_RDONLY
2027 && (_IOC_DIR(cmd) != _IOC_READ
2028 || cmd == FE_GET_EVENT
2029 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2030 up(&fepriv->sem);
2031 return -EPERM;
2032 }
2033
2034 err = dvb_frontend_handle_ioctl(file, cmd, parg);
2035
2036 up(&fepriv->sem);
2037 return err;
2038 }
2039
dvb_frontend_ioctl(struct file * file,unsigned int cmd,unsigned long arg)2040 static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
2041 unsigned long arg)
2042 {
2043 struct dvb_device *dvbdev = file->private_data;
2044
2045 if (!dvbdev)
2046 return -ENODEV;
2047
2048 return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
2049 }
2050
2051 #ifdef CONFIG_COMPAT
2052 struct compat_dtv_property {
2053 __u32 cmd;
2054 __u32 reserved[3];
2055 union {
2056 __u32 data;
2057 struct dtv_fe_stats st;
2058 struct {
2059 __u8 data[32];
2060 __u32 len;
2061 __u32 reserved1[3];
2062 compat_uptr_t reserved2;
2063 } buffer;
2064 } u;
2065 int result;
2066 } __attribute__ ((packed));
2067
2068 struct compat_dtv_properties {
2069 __u32 num;
2070 compat_uptr_t props;
2071 };
2072
2073 #define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties)
2074 #define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties)
2075
dvb_frontend_handle_compat_ioctl(struct file * file,unsigned int cmd,unsigned long arg)2076 static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd,
2077 unsigned long arg)
2078 {
2079 struct dvb_device *dvbdev = file->private_data;
2080 struct dvb_frontend *fe = dvbdev->priv;
2081 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2082 int i, err = 0;
2083
2084 if (cmd == COMPAT_FE_SET_PROPERTY) {
2085 struct compat_dtv_properties prop, *tvps = NULL;
2086 struct compat_dtv_property *tvp = NULL;
2087
2088 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2089 return -EFAULT;
2090
2091 tvps = ∝
2092
2093 /*
2094 * Put an arbitrary limit on the number of messages that can
2095 * be sent at once
2096 */
2097 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2098 return -EINVAL;
2099
2100 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2101 if (IS_ERR(tvp))
2102 return PTR_ERR(tvp);
2103
2104 for (i = 0; i < tvps->num; i++) {
2105 err = dtv_property_process_set(fe, file,
2106 (tvp + i)->cmd,
2107 (tvp + i)->u.data);
2108 if (err < 0) {
2109 kfree(tvp);
2110 return err;
2111 }
2112 }
2113 kfree(tvp);
2114 } else if (cmd == COMPAT_FE_GET_PROPERTY) {
2115 struct compat_dtv_properties prop, *tvps = NULL;
2116 struct compat_dtv_property *tvp = NULL;
2117 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2118
2119 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2120 return -EFAULT;
2121
2122 tvps = ∝
2123
2124 /*
2125 * Put an arbitrary limit on the number of messages that can
2126 * be sent at once
2127 */
2128 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2129 return -EINVAL;
2130
2131 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2132 if (IS_ERR(tvp))
2133 return PTR_ERR(tvp);
2134
2135 /*
2136 * Let's use our own copy of property cache, in order to
2137 * avoid mangling with DTV zigzag logic, as drivers might
2138 * return crap, if they don't check if the data is available
2139 * before updating the properties cache.
2140 */
2141 if (fepriv->state != FESTATE_IDLE) {
2142 err = dtv_get_frontend(fe, &getp, NULL);
2143 if (err < 0) {
2144 kfree(tvp);
2145 return err;
2146 }
2147 }
2148 for (i = 0; i < tvps->num; i++) {
2149 err = dtv_property_process_get(
2150 fe, &getp, (struct dtv_property *)(tvp + i), file);
2151 if (err < 0) {
2152 kfree(tvp);
2153 return err;
2154 }
2155 }
2156
2157 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp,
2158 tvps->num * sizeof(struct compat_dtv_property))) {
2159 kfree(tvp);
2160 return -EFAULT;
2161 }
2162 kfree(tvp);
2163 }
2164
2165 return err;
2166 }
2167
dvb_frontend_compat_ioctl(struct file * file,unsigned int cmd,unsigned long arg)2168 static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd,
2169 unsigned long arg)
2170 {
2171 struct dvb_device *dvbdev = file->private_data;
2172 struct dvb_frontend *fe = dvbdev->priv;
2173 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2174 int err;
2175
2176 if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) {
2177 if (down_interruptible(&fepriv->sem))
2178 return -ERESTARTSYS;
2179
2180 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg);
2181
2182 up(&fepriv->sem);
2183 return err;
2184 }
2185
2186 return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2187 }
2188 #endif
2189
dtv_set_frontend(struct dvb_frontend * fe)2190 static int dtv_set_frontend(struct dvb_frontend *fe)
2191 {
2192 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2193 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2194 struct dvb_frontend_tune_settings fetunesettings;
2195 u32 rolloff = 0;
2196
2197 if (dvb_frontend_check_parameters(fe) < 0)
2198 return -EINVAL;
2199
2200 /*
2201 * Initialize output parameters to match the values given by
2202 * the user. FE_SET_FRONTEND triggers an initial frontend event
2203 * with status = 0, which copies output parameters to userspace.
2204 */
2205 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2206
2207 /*
2208 * Be sure that the bandwidth will be filled for all
2209 * non-satellite systems, as tuners need to know what
2210 * low pass/Nyquist half filter should be applied, in
2211 * order to avoid inter-channel noise.
2212 *
2213 * ISDB-T and DVB-T/T2 already sets bandwidth.
2214 * ATSC and DVB-C don't set, so, the core should fill it.
2215 *
2216 * On DVB-C Annex A and C, the bandwidth is a function of
2217 * the roll-off and symbol rate. Annex B defines different
2218 * roll-off factors depending on the modulation. Fortunately,
2219 * Annex B is only used with 6MHz, so there's no need to
2220 * calculate it.
2221 *
2222 * While not officially supported, a side effect of handling it at
2223 * the cache level is that a program could retrieve the bandwidth
2224 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2225 */
2226 switch (c->delivery_system) {
2227 case SYS_ATSC:
2228 case SYS_DVBC_ANNEX_B:
2229 c->bandwidth_hz = 6000000;
2230 break;
2231 case SYS_DVBC_ANNEX_A:
2232 rolloff = 115;
2233 break;
2234 case SYS_DVBC_ANNEX_C:
2235 rolloff = 113;
2236 break;
2237 case SYS_DVBS:
2238 case SYS_TURBO:
2239 case SYS_ISDBS:
2240 rolloff = 135;
2241 break;
2242 case SYS_DVBS2:
2243 switch (c->rolloff) {
2244 case ROLLOFF_20:
2245 rolloff = 120;
2246 break;
2247 case ROLLOFF_25:
2248 rolloff = 125;
2249 break;
2250 default:
2251 case ROLLOFF_35:
2252 rolloff = 135;
2253 }
2254 break;
2255 default:
2256 break;
2257 }
2258 if (rolloff)
2259 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2260
2261 /* force auto frequency inversion if requested */
2262 if (dvb_force_auto_inversion)
2263 c->inversion = INVERSION_AUTO;
2264
2265 /*
2266 * without hierarchical coding code_rate_LP is irrelevant,
2267 * so we tolerate the otherwise invalid FEC_NONE setting
2268 */
2269 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2270 c->code_rate_LP = FEC_AUTO;
2271
2272 /* get frontend-specific tuning settings */
2273 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2274 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2275 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2276 fepriv->max_drift = fetunesettings.max_drift;
2277 fepriv->step_size = fetunesettings.step_size;
2278 } else {
2279 /* default values */
2280 switch (c->delivery_system) {
2281 case SYS_DVBS:
2282 case SYS_DVBS2:
2283 case SYS_ISDBS:
2284 case SYS_TURBO:
2285 case SYS_DVBC_ANNEX_A:
2286 case SYS_DVBC_ANNEX_C:
2287 fepriv->min_delay = HZ / 20;
2288 fepriv->step_size = c->symbol_rate / 16000;
2289 fepriv->max_drift = c->symbol_rate / 2000;
2290 break;
2291 case SYS_DVBT:
2292 case SYS_DVBT2:
2293 case SYS_ISDBT:
2294 case SYS_DTMB:
2295 fepriv->min_delay = HZ / 20;
2296 fepriv->step_size = dvb_frontend_get_stepsize(fe) * 2;
2297 fepriv->max_drift = (dvb_frontend_get_stepsize(fe) * 2) + 1;
2298 break;
2299 default:
2300 /*
2301 * FIXME: This sounds wrong! if freqency_stepsize is
2302 * defined by the frontend, why not use it???
2303 */
2304 fepriv->min_delay = HZ / 20;
2305 fepriv->step_size = 0; /* no zigzag */
2306 fepriv->max_drift = 0;
2307 break;
2308 }
2309 }
2310 if (dvb_override_tune_delay > 0)
2311 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2312
2313 fepriv->state = FESTATE_RETUNE;
2314
2315 /* Request the search algorithm to search */
2316 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2317
2318 dvb_frontend_clear_events(fe);
2319 dvb_frontend_add_event(fe, 0);
2320 dvb_frontend_wakeup(fe);
2321 fepriv->status = 0;
2322
2323 return 0;
2324 }
2325
dvb_frontend_handle_ioctl(struct file * file,unsigned int cmd,void * parg)2326 static int dvb_frontend_handle_ioctl(struct file *file,
2327 unsigned int cmd, void *parg)
2328 {
2329 struct dvb_device *dvbdev = file->private_data;
2330 struct dvb_frontend *fe = dvbdev->priv;
2331 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2332 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2333 int i, err = -ENOTSUPP;
2334
2335 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2336
2337 switch (cmd) {
2338 case FE_SET_PROPERTY: {
2339 struct dtv_properties *tvps = parg;
2340 struct dtv_property *tvp = NULL;
2341
2342 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2343 __func__, tvps->num);
2344 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2345 __func__, tvps->props);
2346
2347 /*
2348 * Put an arbitrary limit on the number of messages that can
2349 * be sent at once
2350 */
2351 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2352 return -EINVAL;
2353
2354 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2355 if (IS_ERR(tvp))
2356 return PTR_ERR(tvp);
2357
2358 for (i = 0; i < tvps->num; i++) {
2359 err = dtv_property_process_set(fe, file,
2360 (tvp + i)->cmd,
2361 (tvp + i)->u.data);
2362 if (err < 0) {
2363 kfree(tvp);
2364 return err;
2365 }
2366 }
2367 kfree(tvp);
2368 err = 0;
2369 break;
2370 }
2371 case FE_GET_PROPERTY: {
2372 struct dtv_properties *tvps = parg;
2373 struct dtv_property *tvp = NULL;
2374 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2375
2376 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2377 __func__, tvps->num);
2378 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2379 __func__, tvps->props);
2380
2381 /*
2382 * Put an arbitrary limit on the number of messages that can
2383 * be sent at once
2384 */
2385 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2386 return -EINVAL;
2387
2388 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2389 if (IS_ERR(tvp))
2390 return PTR_ERR(tvp);
2391
2392 /*
2393 * Let's use our own copy of property cache, in order to
2394 * avoid mangling with DTV zigzag logic, as drivers might
2395 * return crap, if they don't check if the data is available
2396 * before updating the properties cache.
2397 */
2398 if (fepriv->state != FESTATE_IDLE) {
2399 err = dtv_get_frontend(fe, &getp, NULL);
2400 if (err < 0) {
2401 kfree(tvp);
2402 return err;
2403 }
2404 }
2405 for (i = 0; i < tvps->num; i++) {
2406 err = dtv_property_process_get(fe, &getp,
2407 tvp + i, file);
2408 if (err < 0) {
2409 kfree(tvp);
2410 return err;
2411 }
2412 }
2413
2414 if (copy_to_user((void __user *)tvps->props, tvp,
2415 tvps->num * sizeof(struct dtv_property))) {
2416 kfree(tvp);
2417 return -EFAULT;
2418 }
2419 kfree(tvp);
2420 err = 0;
2421 break;
2422 }
2423
2424 case FE_GET_INFO: {
2425 struct dvb_frontend_info *info = parg;
2426 memset(info, 0, sizeof(*info));
2427
2428 strcpy(info->name, fe->ops.info.name);
2429 info->symbol_rate_min = fe->ops.info.symbol_rate_min;
2430 info->symbol_rate_max = fe->ops.info.symbol_rate_max;
2431 info->symbol_rate_tolerance = fe->ops.info.symbol_rate_tolerance;
2432 info->caps = fe->ops.info.caps;
2433 info->frequency_stepsize = dvb_frontend_get_stepsize(fe);
2434 dvb_frontend_get_frequency_limits(fe, &info->frequency_min,
2435 &info->frequency_max,
2436 &info->frequency_tolerance);
2437
2438 /*
2439 * Associate the 4 delivery systems supported by DVBv3
2440 * API with their DVBv5 counterpart. For the other standards,
2441 * use the closest type, assuming that it would hopefully
2442 * work with a DVBv3 application.
2443 * It should be noticed that, on multi-frontend devices with
2444 * different types (terrestrial and cable, for example),
2445 * a pure DVBv3 application won't be able to use all delivery
2446 * systems. Yet, changing the DVBv5 cache to the other delivery
2447 * system should be enough for making it work.
2448 */
2449 switch (dvbv3_type(c->delivery_system)) {
2450 case DVBV3_QPSK:
2451 info->type = FE_QPSK;
2452 break;
2453 case DVBV3_ATSC:
2454 info->type = FE_ATSC;
2455 break;
2456 case DVBV3_QAM:
2457 info->type = FE_QAM;
2458 break;
2459 case DVBV3_OFDM:
2460 info->type = FE_OFDM;
2461 break;
2462 default:
2463 dev_err(fe->dvb->device,
2464 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2465 __func__, c->delivery_system);
2466 info->type = FE_OFDM;
2467 }
2468 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2469 __func__, c->delivery_system, info->type);
2470
2471 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2472 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2473 info->caps |= FE_CAN_INVERSION_AUTO;
2474 err = 0;
2475 break;
2476 }
2477
2478 case FE_READ_STATUS: {
2479 enum fe_status *status = parg;
2480
2481 /* if retune was requested but hasn't occurred yet, prevent
2482 * that user get signal state from previous tuning */
2483 if (fepriv->state == FESTATE_RETUNE ||
2484 fepriv->state == FESTATE_ERROR) {
2485 err = 0;
2486 *status = 0;
2487 break;
2488 }
2489
2490 if (fe->ops.read_status)
2491 err = fe->ops.read_status(fe, status);
2492 break;
2493 }
2494
2495 case FE_DISEQC_RESET_OVERLOAD:
2496 if (fe->ops.diseqc_reset_overload) {
2497 err = fe->ops.diseqc_reset_overload(fe);
2498 fepriv->state = FESTATE_DISEQC;
2499 fepriv->status = 0;
2500 }
2501 break;
2502
2503 case FE_DISEQC_SEND_MASTER_CMD:
2504 if (fe->ops.diseqc_send_master_cmd) {
2505 struct dvb_diseqc_master_cmd *cmd = parg;
2506
2507 if (cmd->msg_len > sizeof(cmd->msg)) {
2508 err = -EINVAL;
2509 break;
2510 }
2511 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2512 fepriv->state = FESTATE_DISEQC;
2513 fepriv->status = 0;
2514 }
2515 break;
2516
2517 case FE_DISEQC_SEND_BURST:
2518 if (fe->ops.diseqc_send_burst) {
2519 err = fe->ops.diseqc_send_burst(fe,
2520 (enum fe_sec_mini_cmd)parg);
2521 fepriv->state = FESTATE_DISEQC;
2522 fepriv->status = 0;
2523 }
2524 break;
2525
2526 case FE_SET_TONE:
2527 if (fe->ops.set_tone) {
2528 err = fe->ops.set_tone(fe,
2529 (enum fe_sec_tone_mode)parg);
2530 fepriv->tone = (enum fe_sec_tone_mode)parg;
2531 fepriv->state = FESTATE_DISEQC;
2532 fepriv->status = 0;
2533 }
2534 break;
2535
2536 case FE_SET_VOLTAGE:
2537 if (fe->ops.set_voltage) {
2538 err = fe->ops.set_voltage(fe,
2539 (enum fe_sec_voltage)parg);
2540 fepriv->voltage = (enum fe_sec_voltage)parg;
2541 fepriv->state = FESTATE_DISEQC;
2542 fepriv->status = 0;
2543 }
2544 break;
2545
2546 case FE_DISEQC_RECV_SLAVE_REPLY:
2547 if (fe->ops.diseqc_recv_slave_reply)
2548 err = fe->ops.diseqc_recv_slave_reply(fe, parg);
2549 break;
2550
2551 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2552 if (fe->ops.enable_high_lnb_voltage)
2553 err = fe->ops.enable_high_lnb_voltage(fe, (long)parg);
2554 break;
2555
2556 case FE_SET_FRONTEND_TUNE_MODE:
2557 fepriv->tune_mode_flags = (unsigned long)parg;
2558 err = 0;
2559 break;
2560
2561 /* DEPRECATED dish control ioctls */
2562
2563 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2564 if (fe->ops.dishnetwork_send_legacy_command) {
2565 err = fe->ops.dishnetwork_send_legacy_command(fe,
2566 (unsigned long)parg);
2567 fepriv->state = FESTATE_DISEQC;
2568 fepriv->status = 0;
2569 } else if (fe->ops.set_voltage) {
2570 /*
2571 * NOTE: This is a fallback condition. Some frontends
2572 * (stv0299 for instance) take longer than 8msec to
2573 * respond to a set_voltage command. Those switches
2574 * need custom routines to switch properly. For all
2575 * other frontends, the following should work ok.
2576 * Dish network legacy switches (as used by Dish500)
2577 * are controlled by sending 9-bit command words
2578 * spaced 8msec apart.
2579 * the actual command word is switch/port dependent
2580 * so it is up to the userspace application to send
2581 * the right command.
2582 * The command must always start with a '0' after
2583 * initialization, so parg is 8 bits and does not
2584 * include the initialization or start bit
2585 */
2586 unsigned long swcmd = ((unsigned long)parg) << 1;
2587 ktime_t nexttime;
2588 ktime_t tv[10];
2589 int i;
2590 u8 last = 1;
2591
2592 if (dvb_frontend_debug)
2593 dprintk("%s switch command: 0x%04lx\n",
2594 __func__, swcmd);
2595 nexttime = ktime_get_boottime();
2596 if (dvb_frontend_debug)
2597 tv[0] = nexttime;
2598 /* before sending a command, initialize by sending
2599 * a 32ms 18V to the switch
2600 */
2601 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2602 dvb_frontend_sleep_until(&nexttime, 32000);
2603
2604 for (i = 0; i < 9; i++) {
2605 if (dvb_frontend_debug)
2606 tv[i + 1] = ktime_get_boottime();
2607 if ((swcmd & 0x01) != last) {
2608 /* set voltage to (last ? 13V : 18V) */
2609 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2610 last = (last) ? 0 : 1;
2611 }
2612 swcmd = swcmd >> 1;
2613 if (i != 8)
2614 dvb_frontend_sleep_until(&nexttime, 8000);
2615 }
2616 if (dvb_frontend_debug) {
2617 dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n",
2618 __func__, fe->dvb->num);
2619 for (i = 1; i < 10; i++)
2620 pr_info("%d: %d\n", i,
2621 (int)ktime_us_delta(tv[i], tv[i - 1]));
2622 }
2623 err = 0;
2624 fepriv->state = FESTATE_DISEQC;
2625 fepriv->status = 0;
2626 }
2627 break;
2628
2629 /* DEPRECATED statistics ioctls */
2630
2631 case FE_READ_BER:
2632 if (fe->ops.read_ber) {
2633 if (fepriv->thread)
2634 err = fe->ops.read_ber(fe, parg);
2635 else
2636 err = -EAGAIN;
2637 }
2638 break;
2639
2640 case FE_READ_SIGNAL_STRENGTH:
2641 if (fe->ops.read_signal_strength) {
2642 if (fepriv->thread)
2643 err = fe->ops.read_signal_strength(fe, parg);
2644 else
2645 err = -EAGAIN;
2646 }
2647 break;
2648
2649 case FE_READ_SNR:
2650 if (fe->ops.read_snr) {
2651 if (fepriv->thread)
2652 err = fe->ops.read_snr(fe, parg);
2653 else
2654 err = -EAGAIN;
2655 }
2656 break;
2657
2658 case FE_READ_UNCORRECTED_BLOCKS:
2659 if (fe->ops.read_ucblocks) {
2660 if (fepriv->thread)
2661 err = fe->ops.read_ucblocks(fe, parg);
2662 else
2663 err = -EAGAIN;
2664 }
2665 break;
2666
2667 /* DEPRECATED DVBv3 ioctls */
2668
2669 case FE_SET_FRONTEND:
2670 err = dvbv3_set_delivery_system(fe);
2671 if (err)
2672 break;
2673
2674 err = dtv_property_cache_sync(fe, c, parg);
2675 if (err)
2676 break;
2677 err = dtv_set_frontend(fe);
2678 break;
2679 case FE_GET_EVENT:
2680 err = dvb_frontend_get_event(fe, parg, file->f_flags);
2681 break;
2682
2683 case FE_GET_FRONTEND: {
2684 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2685
2686 /*
2687 * Let's use our own copy of property cache, in order to
2688 * avoid mangling with DTV zigzag logic, as drivers might
2689 * return crap, if they don't check if the data is available
2690 * before updating the properties cache.
2691 */
2692 err = dtv_get_frontend(fe, &getp, parg);
2693 break;
2694 }
2695
2696 default:
2697 return -ENOTSUPP;
2698 } /* switch */
2699
2700 return err;
2701 }
2702
dvb_frontend_poll(struct file * file,struct poll_table_struct * wait)2703 static __poll_t dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2704 {
2705 struct dvb_device *dvbdev = file->private_data;
2706 struct dvb_frontend *fe = dvbdev->priv;
2707 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2708
2709 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2710
2711 poll_wait(file, &fepriv->events.wait_queue, wait);
2712
2713 if (fepriv->events.eventw != fepriv->events.eventr)
2714 return (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
2715
2716 return 0;
2717 }
2718
dvb_frontend_open(struct inode * inode,struct file * file)2719 static int dvb_frontend_open(struct inode *inode, struct file *file)
2720 {
2721 struct dvb_device *dvbdev = file->private_data;
2722 struct dvb_frontend *fe = dvbdev->priv;
2723 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2724 struct dvb_adapter *adapter = fe->dvb;
2725 int ret;
2726
2727 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2728 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2729 return -ENODEV;
2730
2731 if (adapter->mfe_shared) {
2732 mutex_lock(&adapter->mfe_lock);
2733
2734 if (!adapter->mfe_dvbdev)
2735 adapter->mfe_dvbdev = dvbdev;
2736
2737 else if (adapter->mfe_dvbdev != dvbdev) {
2738 struct dvb_device
2739 *mfedev = adapter->mfe_dvbdev;
2740 struct dvb_frontend
2741 *mfe = mfedev->priv;
2742 struct dvb_frontend_private
2743 *mfepriv = mfe->frontend_priv;
2744 int mferetry = (dvb_mfe_wait_time << 1);
2745
2746 mutex_unlock(&adapter->mfe_lock);
2747 while (mferetry-- && (mfedev->users != -1 ||
2748 mfepriv->thread)) {
2749 if (msleep_interruptible(500)) {
2750 if (signal_pending(current))
2751 return -EINTR;
2752 }
2753 }
2754
2755 mutex_lock(&adapter->mfe_lock);
2756 if (adapter->mfe_dvbdev != dvbdev) {
2757 mfedev = adapter->mfe_dvbdev;
2758 mfe = mfedev->priv;
2759 mfepriv = mfe->frontend_priv;
2760 if (mfedev->users != -1 ||
2761 mfepriv->thread) {
2762 mutex_unlock(&adapter->mfe_lock);
2763 return -EBUSY;
2764 }
2765 adapter->mfe_dvbdev = dvbdev;
2766 }
2767 }
2768 }
2769
2770 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2771 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2772 goto err0;
2773
2774 /* If we took control of the bus, we need to force
2775 reinitialization. This is because many ts_bus_ctrl()
2776 functions strobe the RESET pin on the demod, and if the
2777 frontend thread already exists then the dvb_init() routine
2778 won't get called (which is what usually does initial
2779 register configuration). */
2780 fepriv->reinitialise = 1;
2781 }
2782
2783 if ((ret = dvb_generic_open(inode, file)) < 0)
2784 goto err1;
2785
2786 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2787 /* normal tune mode when opened R/W */
2788 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2789 fepriv->tone = -1;
2790 fepriv->voltage = -1;
2791
2792 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2793 mutex_lock(&fe->dvb->mdev_lock);
2794 if (fe->dvb->mdev) {
2795 mutex_lock(&fe->dvb->mdev->graph_mutex);
2796 if (fe->dvb->mdev->enable_source)
2797 ret = fe->dvb->mdev->enable_source(
2798 dvbdev->entity,
2799 &fepriv->pipe);
2800 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2801 if (ret) {
2802 mutex_unlock(&fe->dvb->mdev_lock);
2803 dev_err(fe->dvb->device,
2804 "Tuner is busy. Error %d\n", ret);
2805 goto err2;
2806 }
2807 }
2808 mutex_unlock(&fe->dvb->mdev_lock);
2809 #endif
2810 ret = dvb_frontend_start(fe);
2811 if (ret)
2812 goto err3;
2813
2814 /* empty event queue */
2815 fepriv->events.eventr = fepriv->events.eventw = 0;
2816 }
2817
2818 dvb_frontend_get(fe);
2819
2820 if (adapter->mfe_shared)
2821 mutex_unlock(&adapter->mfe_lock);
2822 return ret;
2823
2824 err3:
2825 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2826 mutex_lock(&fe->dvb->mdev_lock);
2827 if (fe->dvb->mdev) {
2828 mutex_lock(&fe->dvb->mdev->graph_mutex);
2829 if (fe->dvb->mdev->disable_source)
2830 fe->dvb->mdev->disable_source(dvbdev->entity);
2831 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2832 }
2833 mutex_unlock(&fe->dvb->mdev_lock);
2834 err2:
2835 #endif
2836 dvb_generic_release(inode, file);
2837 err1:
2838 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2839 fe->ops.ts_bus_ctrl(fe, 0);
2840 err0:
2841 if (adapter->mfe_shared)
2842 mutex_unlock(&adapter->mfe_lock);
2843 return ret;
2844 }
2845
dvb_frontend_release(struct inode * inode,struct file * file)2846 static int dvb_frontend_release(struct inode *inode, struct file *file)
2847 {
2848 struct dvb_device *dvbdev = file->private_data;
2849 struct dvb_frontend *fe = dvbdev->priv;
2850 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2851 int ret;
2852
2853 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2854
2855 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2856 fepriv->release_jiffies = jiffies;
2857 mb();
2858 }
2859
2860 ret = dvb_generic_release(inode, file);
2861
2862 if (dvbdev->users == -1) {
2863 wake_up(&fepriv->wait_queue);
2864 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2865 mutex_lock(&fe->dvb->mdev_lock);
2866 if (fe->dvb->mdev) {
2867 mutex_lock(&fe->dvb->mdev->graph_mutex);
2868 if (fe->dvb->mdev->disable_source)
2869 fe->dvb->mdev->disable_source(dvbdev->entity);
2870 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2871 }
2872 mutex_unlock(&fe->dvb->mdev_lock);
2873 #endif
2874 if (fe->exit != DVB_FE_NO_EXIT)
2875 wake_up(&dvbdev->wait_queue);
2876 if (fe->ops.ts_bus_ctrl)
2877 fe->ops.ts_bus_ctrl(fe, 0);
2878 }
2879
2880 dvb_frontend_put(fe);
2881
2882 return ret;
2883 }
2884
2885 static const struct file_operations dvb_frontend_fops = {
2886 .owner = THIS_MODULE,
2887 .unlocked_ioctl = dvb_frontend_ioctl,
2888 #ifdef CONFIG_COMPAT
2889 .compat_ioctl = dvb_frontend_compat_ioctl,
2890 #endif
2891 .poll = dvb_frontend_poll,
2892 .open = dvb_frontend_open,
2893 .release = dvb_frontend_release,
2894 .llseek = noop_llseek,
2895 };
2896
dvb_frontend_suspend(struct dvb_frontend * fe)2897 int dvb_frontend_suspend(struct dvb_frontend *fe)
2898 {
2899 int ret = 0;
2900
2901 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2902 fe->id);
2903
2904 if (fe->ops.tuner_ops.suspend)
2905 ret = fe->ops.tuner_ops.suspend(fe);
2906 else if (fe->ops.tuner_ops.sleep)
2907 ret = fe->ops.tuner_ops.sleep(fe);
2908
2909 if (fe->ops.sleep)
2910 ret = fe->ops.sleep(fe);
2911
2912 return ret;
2913 }
2914 EXPORT_SYMBOL(dvb_frontend_suspend);
2915
dvb_frontend_resume(struct dvb_frontend * fe)2916 int dvb_frontend_resume(struct dvb_frontend *fe)
2917 {
2918 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2919 int ret = 0;
2920
2921 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2922 fe->id);
2923
2924 fe->exit = DVB_FE_DEVICE_RESUME;
2925 if (fe->ops.init)
2926 ret = fe->ops.init(fe);
2927
2928 if (fe->ops.tuner_ops.resume)
2929 ret = fe->ops.tuner_ops.resume(fe);
2930 else if (fe->ops.tuner_ops.init)
2931 ret = fe->ops.tuner_ops.init(fe);
2932
2933 if (fe->ops.set_tone && fepriv->tone != -1)
2934 fe->ops.set_tone(fe, fepriv->tone);
2935 if (fe->ops.set_voltage && fepriv->voltage != -1)
2936 fe->ops.set_voltage(fe, fepriv->voltage);
2937
2938 fe->exit = DVB_FE_NO_EXIT;
2939 fepriv->state = FESTATE_RETUNE;
2940 dvb_frontend_wakeup(fe);
2941
2942 return ret;
2943 }
2944 EXPORT_SYMBOL(dvb_frontend_resume);
2945
dvb_register_frontend(struct dvb_adapter * dvb,struct dvb_frontend * fe)2946 int dvb_register_frontend(struct dvb_adapter *dvb,
2947 struct dvb_frontend *fe)
2948 {
2949 struct dvb_frontend_private *fepriv;
2950 const struct dvb_device dvbdev_template = {
2951 .users = ~0,
2952 .writers = 1,
2953 .readers = (~0) - 1,
2954 .fops = &dvb_frontend_fops,
2955 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2956 .name = fe->ops.info.name,
2957 #endif
2958 };
2959
2960 dev_dbg(dvb->device, "%s:\n", __func__);
2961
2962 if (mutex_lock_interruptible(&frontend_mutex))
2963 return -ERESTARTSYS;
2964
2965 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2966 if (!fe->frontend_priv) {
2967 mutex_unlock(&frontend_mutex);
2968 return -ENOMEM;
2969 }
2970 fepriv = fe->frontend_priv;
2971
2972 kref_init(&fe->refcount);
2973
2974 /*
2975 * After initialization, there need to be two references: one
2976 * for dvb_unregister_frontend(), and another one for
2977 * dvb_frontend_detach().
2978 */
2979 dvb_frontend_get(fe);
2980
2981 sema_init(&fepriv->sem, 1);
2982 init_waitqueue_head(&fepriv->wait_queue);
2983 init_waitqueue_head(&fepriv->events.wait_queue);
2984 mutex_init(&fepriv->events.mtx);
2985 fe->dvb = dvb;
2986 fepriv->inversion = INVERSION_OFF;
2987
2988 dev_info(fe->dvb->device,
2989 "DVB: registering adapter %i frontend %i (%s)...\n",
2990 fe->dvb->num, fe->id, fe->ops.info.name);
2991
2992 dvb_register_device(fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2993 fe, DVB_DEVICE_FRONTEND, 0);
2994
2995 /*
2996 * Initialize the cache to the proper values according with the
2997 * first supported delivery system (ops->delsys[0])
2998 */
2999
3000 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
3001 dvb_frontend_clear_cache(fe);
3002
3003 mutex_unlock(&frontend_mutex);
3004 return 0;
3005 }
3006 EXPORT_SYMBOL(dvb_register_frontend);
3007
dvb_unregister_frontend(struct dvb_frontend * fe)3008 int dvb_unregister_frontend(struct dvb_frontend *fe)
3009 {
3010 struct dvb_frontend_private *fepriv = fe->frontend_priv;
3011
3012 dev_dbg(fe->dvb->device, "%s:\n", __func__);
3013
3014 mutex_lock(&frontend_mutex);
3015 dvb_frontend_stop(fe);
3016 dvb_remove_device(fepriv->dvbdev);
3017
3018 /* fe is invalid now */
3019 mutex_unlock(&frontend_mutex);
3020 dvb_frontend_put(fe);
3021 return 0;
3022 }
3023 EXPORT_SYMBOL(dvb_unregister_frontend);
3024
dvb_frontend_invoke_release(struct dvb_frontend * fe,void (* release)(struct dvb_frontend * fe))3025 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
3026 void (*release)(struct dvb_frontend *fe))
3027 {
3028 if (release) {
3029 release(fe);
3030 #ifdef CONFIG_MEDIA_ATTACH
3031 dvb_detach(release);
3032 #endif
3033 }
3034 }
3035
dvb_frontend_detach(struct dvb_frontend * fe)3036 void dvb_frontend_detach(struct dvb_frontend *fe)
3037 {
3038 dvb_frontend_invoke_release(fe, fe->ops.release_sec);
3039 dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
3040 dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
3041 dvb_frontend_put(fe);
3042 }
3043 EXPORT_SYMBOL(dvb_frontend_detach);
3044