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