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Merge tag 'media/v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[thirdparty/kernel/stable.git] / drivers / media / dvb-core / dvb_frontend.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * dvb_frontend.c: DVB frontend tuning interface/thread
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
13 /* Enables DVBv3 compatibility bits at the headers */
14 #define __DVB_CORE__
15
16 #define pr_fmt(fmt) "dvb_frontend: " fmt
17
18 #include <linux/string.h>
19 #include <linux/kernel.h>
20 #include <linux/sched/signal.h>
21 #include <linux/wait.h>
22 #include <linux/slab.h>
23 #include <linux/poll.h>
24 #include <linux/semaphore.h>
25 #include <linux/module.h>
26 #include <linux/list.h>
27 #include <linux/freezer.h>
28 #include <linux/jiffies.h>
29 #include <linux/kthread.h>
30 #include <linux/ktime.h>
31 #include <linux/compat.h>
32 #include <asm/processor.h>
33
34 #include <media/dvb_frontend.h>
35 #include <media/dvbdev.h>
36 #include <linux/dvb/version.h>
37
38 static int dvb_frontend_debug;
39 static int dvb_shutdown_timeout;
40 static int dvb_force_auto_inversion;
41 static int dvb_override_tune_delay;
42 static int dvb_powerdown_on_sleep = 1;
43 static int dvb_mfe_wait_time = 5;
44
45 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
46 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
47 module_param(dvb_shutdown_timeout, int, 0644);
48 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
49 module_param(dvb_force_auto_inversion, int, 0644);
50 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
51 module_param(dvb_override_tune_delay, int, 0644);
52 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
53 module_param(dvb_powerdown_on_sleep, int, 0644);
54 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
55 module_param(dvb_mfe_wait_time, int, 0644);
56 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)");
57
58 #define dprintk(fmt, arg...) \
59 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
60
61 #define FESTATE_IDLE 1
62 #define FESTATE_RETUNE 2
63 #define FESTATE_TUNING_FAST 4
64 #define FESTATE_TUNING_SLOW 8
65 #define FESTATE_TUNED 16
66 #define FESTATE_ZIGZAG_FAST 32
67 #define FESTATE_ZIGZAG_SLOW 64
68 #define FESTATE_DISEQC 128
69 #define FESTATE_ERROR 256
70 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
71 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
72 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
73 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
74
75 /*
76 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
77 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
78 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
79 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
80 * FESTATE_TUNED. The frontend has successfully locked on.
81 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
82 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
83 * FESTATE_DISEQC. A DISEQC command has just been issued.
84 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
85 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
86 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
87 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
88 */
89
90 static DEFINE_MUTEX(frontend_mutex);
91
92 struct dvb_frontend_private {
93 /* thread/frontend values */
94 struct dvb_device *dvbdev;
95 struct dvb_frontend_parameters parameters_out;
96 struct dvb_fe_events events;
97 struct semaphore sem;
98 struct list_head list_head;
99 wait_queue_head_t wait_queue;
100 struct task_struct *thread;
101 unsigned long release_jiffies;
102 unsigned int wakeup;
103 enum fe_status status;
104 unsigned long tune_mode_flags;
105 unsigned int delay;
106 unsigned int reinitialise;
107 int tone;
108 int voltage;
109
110 /* swzigzag values */
111 unsigned int state;
112 unsigned int bending;
113 int lnb_drift;
114 unsigned int inversion;
115 unsigned int auto_step;
116 unsigned int auto_sub_step;
117 unsigned int started_auto_step;
118 unsigned int min_delay;
119 unsigned int max_drift;
120 unsigned int step_size;
121 int quality;
122 unsigned int check_wrapped;
123 enum dvbfe_search algo_status;
124
125 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
126 struct media_pipeline pipe;
127 #endif
128 };
129
130 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
131 void (*release)(struct dvb_frontend *fe));
132
133 static void __dvb_frontend_free(struct dvb_frontend *fe)
134 {
135 struct dvb_frontend_private *fepriv = fe->frontend_priv;
136
137 if (fepriv)
138 dvb_free_device(fepriv->dvbdev);
139
140 dvb_frontend_invoke_release(fe, fe->ops.release);
141
142 kfree(fepriv);
143 }
144
145 static void dvb_frontend_free(struct kref *ref)
146 {
147 struct dvb_frontend *fe =
148 container_of(ref, struct dvb_frontend, refcount);
149
150 __dvb_frontend_free(fe);
151 }
152
153 static void dvb_frontend_put(struct dvb_frontend *fe)
154 {
155 /*
156 * Check if the frontend was registered, as otherwise
157 * kref was not initialized yet.
158 */
159 if (fe->frontend_priv)
160 kref_put(&fe->refcount, dvb_frontend_free);
161 else
162 __dvb_frontend_free(fe);
163 }
164
165 static void dvb_frontend_get(struct dvb_frontend *fe)
166 {
167 kref_get(&fe->refcount);
168 }
169
170 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
171 static int dtv_get_frontend(struct dvb_frontend *fe,
172 struct dtv_frontend_properties *c,
173 struct dvb_frontend_parameters *p_out);
174 static int
175 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
176 const struct dtv_frontend_properties *c,
177 struct dvb_frontend_parameters *p);
178
179 static bool has_get_frontend(struct dvb_frontend *fe)
180 {
181 return fe->ops.get_frontend;
182 }
183
184 /*
185 * Due to DVBv3 API calls, a delivery system should be mapped into one of
186 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
187 * otherwise, a DVBv3 call will fail.
188 */
189 enum dvbv3_emulation_type {
190 DVBV3_UNKNOWN,
191 DVBV3_QPSK,
192 DVBV3_QAM,
193 DVBV3_OFDM,
194 DVBV3_ATSC,
195 };
196
197 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
198 {
199 switch (delivery_system) {
200 case SYS_DVBC_ANNEX_A:
201 case SYS_DVBC_ANNEX_C:
202 return DVBV3_QAM;
203 case SYS_DVBS:
204 case SYS_DVBS2:
205 case SYS_TURBO:
206 case SYS_ISDBS:
207 case SYS_DSS:
208 return DVBV3_QPSK;
209 case SYS_DVBT:
210 case SYS_DVBT2:
211 case SYS_ISDBT:
212 case SYS_DTMB:
213 return DVBV3_OFDM;
214 case SYS_ATSC:
215 case SYS_ATSCMH:
216 case SYS_DVBC_ANNEX_B:
217 return DVBV3_ATSC;
218 case SYS_UNDEFINED:
219 case SYS_ISDBC:
220 case SYS_DVBH:
221 case SYS_DAB:
222 default:
223 /*
224 * Doesn't know how to emulate those types and/or
225 * there's no frontend driver from this type yet
226 * with some emulation code, so, we're not sure yet how
227 * to handle them, or they're not compatible with a DVBv3 call.
228 */
229 return DVBV3_UNKNOWN;
230 }
231 }
232
233 static void dvb_frontend_add_event(struct dvb_frontend *fe,
234 enum fe_status status)
235 {
236 struct dvb_frontend_private *fepriv = fe->frontend_priv;
237 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
238 struct dvb_fe_events *events = &fepriv->events;
239 struct dvb_frontend_event *e;
240 int wp;
241
242 dev_dbg(fe->dvb->device, "%s:\n", __func__);
243
244 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
245 dtv_get_frontend(fe, c, &fepriv->parameters_out);
246
247 mutex_lock(&events->mtx);
248
249 wp = (events->eventw + 1) % MAX_EVENT;
250 if (wp == events->eventr) {
251 events->overflow = 1;
252 events->eventr = (events->eventr + 1) % MAX_EVENT;
253 }
254
255 e = &events->events[events->eventw];
256 e->status = status;
257 e->parameters = fepriv->parameters_out;
258
259 events->eventw = wp;
260
261 mutex_unlock(&events->mtx);
262
263 wake_up_interruptible(&events->wait_queue);
264 }
265
266 static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv,
267 struct dvb_fe_events *events)
268 {
269 int ret;
270
271 up(&fepriv->sem);
272 ret = events->eventw != events->eventr;
273 down(&fepriv->sem);
274
275 return ret;
276 }
277
278 static int dvb_frontend_get_event(struct dvb_frontend *fe,
279 struct dvb_frontend_event *event, int flags)
280 {
281 struct dvb_frontend_private *fepriv = fe->frontend_priv;
282 struct dvb_fe_events *events = &fepriv->events;
283
284 dev_dbg(fe->dvb->device, "%s:\n", __func__);
285
286 if (events->overflow) {
287 events->overflow = 0;
288 return -EOVERFLOW;
289 }
290
291 if (events->eventw == events->eventr) {
292 int ret;
293
294 if (flags & O_NONBLOCK)
295 return -EWOULDBLOCK;
296
297 ret = wait_event_interruptible(events->wait_queue,
298 dvb_frontend_test_event(fepriv, events));
299
300 if (ret < 0)
301 return ret;
302 }
303
304 mutex_lock(&events->mtx);
305 *event = events->events[events->eventr];
306 events->eventr = (events->eventr + 1) % MAX_EVENT;
307 mutex_unlock(&events->mtx);
308
309 return 0;
310 }
311
312 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
313 {
314 struct dvb_frontend_private *fepriv = fe->frontend_priv;
315 struct dvb_fe_events *events = &fepriv->events;
316
317 mutex_lock(&events->mtx);
318 events->eventr = events->eventw;
319 mutex_unlock(&events->mtx);
320 }
321
322 static void dvb_frontend_init(struct dvb_frontend *fe)
323 {
324 dev_dbg(fe->dvb->device,
325 "%s: initialising adapter %i frontend %i (%s)...\n",
326 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
327
328 if (fe->ops.init)
329 fe->ops.init(fe);
330 if (fe->ops.tuner_ops.init) {
331 if (fe->ops.i2c_gate_ctrl)
332 fe->ops.i2c_gate_ctrl(fe, 1);
333 fe->ops.tuner_ops.init(fe);
334 if (fe->ops.i2c_gate_ctrl)
335 fe->ops.i2c_gate_ctrl(fe, 0);
336 }
337 }
338
339 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
340 {
341 struct dvb_frontend_private *fepriv = fe->frontend_priv;
342
343 fepriv->reinitialise = 1;
344 dvb_frontend_wakeup(fe);
345 }
346 EXPORT_SYMBOL(dvb_frontend_reinitialise);
347
348 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
349 {
350 int q2;
351 struct dvb_frontend *fe = fepriv->dvbdev->priv;
352
353 dev_dbg(fe->dvb->device, "%s:\n", __func__);
354
355 if (locked)
356 (fepriv->quality) = (fepriv->quality * 220 + 36 * 256) / 256;
357 else
358 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
359
360 q2 = fepriv->quality - 128;
361 q2 *= q2;
362
363 fepriv->delay = fepriv->min_delay + q2 * HZ / (128 * 128);
364 }
365
366 /**
367 * dvb_frontend_swzigzag_autotune - Performs automatic twiddling of frontend
368 * parameters.
369 *
370 * @fe: The frontend concerned.
371 * @check_wrapped: Checks if an iteration has completed.
372 * DO NOT SET ON THE FIRST ATTEMPT.
373 *
374 * return: Number of complete iterations that have been performed.
375 */
376 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
377 {
378 int autoinversion;
379 int ready = 0;
380 int fe_set_err = 0;
381 struct dvb_frontend_private *fepriv = fe->frontend_priv;
382 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
383 int original_inversion = c->inversion;
384 u32 original_frequency = c->frequency;
385
386 /* are we using autoinversion? */
387 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
388 (c->inversion == INVERSION_AUTO));
389
390 /* setup parameters correctly */
391 while (!ready) {
392 /* calculate the lnb_drift */
393 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
394
395 /* wrap the auto_step if we've exceeded the maximum drift */
396 if (fepriv->lnb_drift > fepriv->max_drift) {
397 fepriv->auto_step = 0;
398 fepriv->auto_sub_step = 0;
399 fepriv->lnb_drift = 0;
400 }
401
402 /* perform inversion and +/- zigzag */
403 switch (fepriv->auto_sub_step) {
404 case 0:
405 /* try with the current inversion and current drift setting */
406 ready = 1;
407 break;
408
409 case 1:
410 if (!autoinversion) break;
411
412 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
413 ready = 1;
414 break;
415
416 case 2:
417 if (fepriv->lnb_drift == 0) break;
418
419 fepriv->lnb_drift = -fepriv->lnb_drift;
420 ready = 1;
421 break;
422
423 case 3:
424 if (fepriv->lnb_drift == 0) break;
425 if (!autoinversion) break;
426
427 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
428 fepriv->lnb_drift = -fepriv->lnb_drift;
429 ready = 1;
430 break;
431
432 default:
433 fepriv->auto_step++;
434 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
435 break;
436 }
437
438 if (!ready) fepriv->auto_sub_step++;
439 }
440
441 /* if this attempt would hit where we started, indicate a complete
442 * iteration has occurred */
443 if ((fepriv->auto_step == fepriv->started_auto_step) &&
444 (fepriv->auto_sub_step == 0) && check_wrapped) {
445 return 1;
446 }
447
448 dev_dbg(fe->dvb->device,
449 "%s: drift:%i inversion:%i auto_step:%i auto_sub_step:%i started_auto_step:%i\n",
450 __func__, fepriv->lnb_drift, fepriv->inversion,
451 fepriv->auto_step, fepriv->auto_sub_step,
452 fepriv->started_auto_step);
453
454 /* set the frontend itself */
455 c->frequency += fepriv->lnb_drift;
456 if (autoinversion)
457 c->inversion = fepriv->inversion;
458 tmp = *c;
459 if (fe->ops.set_frontend)
460 fe_set_err = fe->ops.set_frontend(fe);
461 *c = tmp;
462 if (fe_set_err < 0) {
463 fepriv->state = FESTATE_ERROR;
464 return fe_set_err;
465 }
466
467 c->frequency = original_frequency;
468 c->inversion = original_inversion;
469
470 fepriv->auto_sub_step++;
471 return 0;
472 }
473
474 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
475 {
476 enum fe_status s = FE_NONE;
477 int retval = 0;
478 struct dvb_frontend_private *fepriv = fe->frontend_priv;
479 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
480
481 /* if we've got no parameters, just keep idling */
482 if (fepriv->state & FESTATE_IDLE) {
483 fepriv->delay = 3 * HZ;
484 fepriv->quality = 0;
485 return;
486 }
487
488 /* in SCAN mode, we just set the frontend when asked and leave it alone */
489 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
490 if (fepriv->state & FESTATE_RETUNE) {
491 tmp = *c;
492 if (fe->ops.set_frontend)
493 retval = fe->ops.set_frontend(fe);
494 *c = tmp;
495 if (retval < 0)
496 fepriv->state = FESTATE_ERROR;
497 else
498 fepriv->state = FESTATE_TUNED;
499 }
500 fepriv->delay = 3 * HZ;
501 fepriv->quality = 0;
502 return;
503 }
504
505 /* get the frontend status */
506 if (fepriv->state & FESTATE_RETUNE) {
507 s = 0;
508 } else {
509 if (fe->ops.read_status)
510 fe->ops.read_status(fe, &s);
511 if (s != fepriv->status) {
512 dvb_frontend_add_event(fe, s);
513 fepriv->status = s;
514 }
515 }
516
517 /* if we're not tuned, and we have a lock, move to the TUNED state */
518 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
519 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
520 fepriv->state = FESTATE_TUNED;
521
522 /* if we're tuned, then we have determined the correct inversion */
523 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
524 (c->inversion == INVERSION_AUTO)) {
525 c->inversion = fepriv->inversion;
526 }
527 return;
528 }
529
530 /* if we are tuned already, check we're still locked */
531 if (fepriv->state & FESTATE_TUNED) {
532 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
533
534 /* we're tuned, and the lock is still good... */
535 if (s & FE_HAS_LOCK) {
536 return;
537 } else { /* if we _WERE_ tuned, but now don't have a lock */
538 fepriv->state = FESTATE_ZIGZAG_FAST;
539 fepriv->started_auto_step = fepriv->auto_step;
540 fepriv->check_wrapped = 0;
541 }
542 }
543
544 /* don't actually do anything if we're in the LOSTLOCK state,
545 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
546 if ((fepriv->state & FESTATE_LOSTLOCK) &&
547 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
548 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
549 return;
550 }
551
552 /* don't do anything if we're in the DISEQC state, since this
553 * might be someone with a motorized dish controlled by DISEQC.
554 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
555 if (fepriv->state & FESTATE_DISEQC) {
556 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
557 return;
558 }
559
560 /* if we're in the RETUNE state, set everything up for a brand
561 * new scan, keeping the current inversion setting, as the next
562 * tune is _very_ likely to require the same */
563 if (fepriv->state & FESTATE_RETUNE) {
564 fepriv->lnb_drift = 0;
565 fepriv->auto_step = 0;
566 fepriv->auto_sub_step = 0;
567 fepriv->started_auto_step = 0;
568 fepriv->check_wrapped = 0;
569 }
570
571 /* fast zigzag. */
572 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
573 fepriv->delay = fepriv->min_delay;
574
575 /* perform a tune */
576 retval = dvb_frontend_swzigzag_autotune(fe,
577 fepriv->check_wrapped);
578 if (retval < 0) {
579 return;
580 } else if (retval) {
581 /* OK, if we've run out of trials at the fast speed.
582 * Drop back to slow for the _next_ attempt */
583 fepriv->state = FESTATE_SEARCHING_SLOW;
584 fepriv->started_auto_step = fepriv->auto_step;
585 return;
586 }
587 fepriv->check_wrapped = 1;
588
589 /* if we've just re-tuned, enter the ZIGZAG_FAST state.
590 * This ensures we cannot return from an
591 * FE_SET_FRONTEND ioctl before the first frontend tune
592 * occurs */
593 if (fepriv->state & FESTATE_RETUNE) {
594 fepriv->state = FESTATE_TUNING_FAST;
595 }
596 }
597
598 /* slow zigzag */
599 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
600 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
601
602 /* Note: don't bother checking for wrapping; we stay in this
603 * state until we get a lock */
604 dvb_frontend_swzigzag_autotune(fe, 0);
605 }
606 }
607
608 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
609 {
610 struct dvb_frontend_private *fepriv = fe->frontend_priv;
611
612 if (fe->exit != DVB_FE_NO_EXIT)
613 return 1;
614
615 if (fepriv->dvbdev->writers == 1)
616 if (time_after_eq(jiffies, fepriv->release_jiffies +
617 dvb_shutdown_timeout * HZ))
618 return 1;
619
620 return 0;
621 }
622
623 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
624 {
625 struct dvb_frontend_private *fepriv = fe->frontend_priv;
626
627 if (fepriv->wakeup) {
628 fepriv->wakeup = 0;
629 return 1;
630 }
631 return dvb_frontend_is_exiting(fe);
632 }
633
634 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
635 {
636 struct dvb_frontend_private *fepriv = fe->frontend_priv;
637
638 fepriv->wakeup = 1;
639 wake_up_interruptible(&fepriv->wait_queue);
640 }
641
642 static int dvb_frontend_thread(void *data)
643 {
644 struct dvb_frontend *fe = data;
645 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
646 struct dvb_frontend_private *fepriv = fe->frontend_priv;
647 enum fe_status s = FE_NONE;
648 enum dvbfe_algo algo;
649 bool re_tune = false;
650 bool semheld = false;
651
652 dev_dbg(fe->dvb->device, "%s:\n", __func__);
653
654 fepriv->check_wrapped = 0;
655 fepriv->quality = 0;
656 fepriv->delay = 3 * HZ;
657 fepriv->status = 0;
658 fepriv->wakeup = 0;
659 fepriv->reinitialise = 0;
660
661 dvb_frontend_init(fe);
662
663 set_freezable();
664 while (1) {
665 up(&fepriv->sem); /* is locked when we enter the thread... */
666 restart:
667 wait_event_interruptible_timeout(fepriv->wait_queue,
668 dvb_frontend_should_wakeup(fe) ||
669 kthread_should_stop() ||
670 freezing(current),
671 fepriv->delay);
672
673 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
674 /* got signal or quitting */
675 if (!down_interruptible(&fepriv->sem))
676 semheld = true;
677 fe->exit = DVB_FE_NORMAL_EXIT;
678 break;
679 }
680
681 if (try_to_freeze())
682 goto restart;
683
684 if (down_interruptible(&fepriv->sem))
685 break;
686
687 if (fepriv->reinitialise) {
688 dvb_frontend_init(fe);
689 if (fe->ops.set_tone && fepriv->tone != -1)
690 fe->ops.set_tone(fe, fepriv->tone);
691 if (fe->ops.set_voltage && fepriv->voltage != -1)
692 fe->ops.set_voltage(fe, fepriv->voltage);
693 fepriv->reinitialise = 0;
694 }
695
696 /* do an iteration of the tuning loop */
697 if (fe->ops.get_frontend_algo) {
698 algo = fe->ops.get_frontend_algo(fe);
699 switch (algo) {
700 case DVBFE_ALGO_HW:
701 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
702
703 if (fepriv->state & FESTATE_RETUNE) {
704 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
705 re_tune = true;
706 fepriv->state = FESTATE_TUNED;
707 } else {
708 re_tune = false;
709 }
710
711 if (fe->ops.tune)
712 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
713
714 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
715 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
716 dvb_frontend_add_event(fe, s);
717 fepriv->status = s;
718 }
719 break;
720 case DVBFE_ALGO_SW:
721 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
722 dvb_frontend_swzigzag(fe);
723 break;
724 case DVBFE_ALGO_CUSTOM:
725 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
726 if (fepriv->state & FESTATE_RETUNE) {
727 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
728 fepriv->state = FESTATE_TUNED;
729 }
730 /* Case where we are going to search for a carrier
731 * User asked us to retune again for some reason, possibly
732 * requesting a search with a new set of parameters
733 */
734 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
735 if (fe->ops.search) {
736 fepriv->algo_status = fe->ops.search(fe);
737 /* We did do a search as was requested, the flags are
738 * now unset as well and has the flags wrt to search.
739 */
740 } else {
741 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
742 }
743 }
744 /* Track the carrier if the search was successful */
745 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
746 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
747 fepriv->delay = HZ / 2;
748 }
749 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
750 fe->ops.read_status(fe, &s);
751 if (s != fepriv->status) {
752 dvb_frontend_add_event(fe, s); /* update event list */
753 fepriv->status = s;
754 if (!(s & FE_HAS_LOCK)) {
755 fepriv->delay = HZ / 10;
756 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
757 } else {
758 fepriv->delay = 60 * HZ;
759 }
760 }
761 break;
762 default:
763 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
764 break;
765 }
766 } else {
767 dvb_frontend_swzigzag(fe);
768 }
769 }
770
771 if (dvb_powerdown_on_sleep) {
772 if (fe->ops.set_voltage)
773 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
774 if (fe->ops.tuner_ops.sleep) {
775 if (fe->ops.i2c_gate_ctrl)
776 fe->ops.i2c_gate_ctrl(fe, 1);
777 fe->ops.tuner_ops.sleep(fe);
778 if (fe->ops.i2c_gate_ctrl)
779 fe->ops.i2c_gate_ctrl(fe, 0);
780 }
781 if (fe->ops.sleep)
782 fe->ops.sleep(fe);
783 }
784
785 fepriv->thread = NULL;
786 if (kthread_should_stop())
787 fe->exit = DVB_FE_DEVICE_REMOVED;
788 else
789 fe->exit = DVB_FE_NO_EXIT;
790 mb();
791
792 if (semheld)
793 up(&fepriv->sem);
794 dvb_frontend_wakeup(fe);
795 return 0;
796 }
797
798 static void dvb_frontend_stop(struct dvb_frontend *fe)
799 {
800 struct dvb_frontend_private *fepriv = fe->frontend_priv;
801
802 dev_dbg(fe->dvb->device, "%s:\n", __func__);
803
804 if (fe->exit != DVB_FE_DEVICE_REMOVED)
805 fe->exit = DVB_FE_NORMAL_EXIT;
806 mb();
807
808 if (!fepriv->thread)
809 return;
810
811 kthread_stop(fepriv->thread);
812
813 sema_init(&fepriv->sem, 1);
814 fepriv->state = FESTATE_IDLE;
815
816 /* paranoia check in case a signal arrived */
817 if (fepriv->thread)
818 dev_warn(fe->dvb->device,
819 "dvb_frontend_stop: warning: thread %p won't exit\n",
820 fepriv->thread);
821 }
822
823 /*
824 * Sleep for the amount of time given by add_usec parameter
825 *
826 * This needs to be as precise as possible, as it affects the detection of
827 * the dish tone command at the satellite subsystem. The precision is improved
828 * by using a scheduled msleep followed by udelay for the remainder.
829 */
830 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
831 {
832 s32 delta;
833
834 *waketime = ktime_add_us(*waketime, add_usec);
835 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
836 if (delta > 2500) {
837 msleep((delta - 1500) / 1000);
838 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
839 }
840 if (delta > 0)
841 udelay(delta);
842 }
843 EXPORT_SYMBOL(dvb_frontend_sleep_until);
844
845 static int dvb_frontend_start(struct dvb_frontend *fe)
846 {
847 int ret;
848 struct dvb_frontend_private *fepriv = fe->frontend_priv;
849 struct task_struct *fe_thread;
850
851 dev_dbg(fe->dvb->device, "%s:\n", __func__);
852
853 if (fepriv->thread) {
854 if (fe->exit == DVB_FE_NO_EXIT)
855 return 0;
856 else
857 dvb_frontend_stop(fe);
858 }
859
860 if (signal_pending(current))
861 return -EINTR;
862 if (down_interruptible(&fepriv->sem))
863 return -EINTR;
864
865 fepriv->state = FESTATE_IDLE;
866 fe->exit = DVB_FE_NO_EXIT;
867 fepriv->thread = NULL;
868 mb();
869
870 fe_thread = kthread_run(dvb_frontend_thread, fe,
871 "kdvb-ad-%i-fe-%i", fe->dvb->num, fe->id);
872 if (IS_ERR(fe_thread)) {
873 ret = PTR_ERR(fe_thread);
874 dev_warn(fe->dvb->device,
875 "dvb_frontend_start: failed to start kthread (%d)\n",
876 ret);
877 up(&fepriv->sem);
878 return ret;
879 }
880 fepriv->thread = fe_thread;
881 return 0;
882 }
883
884 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
885 u32 *freq_min, u32 *freq_max,
886 u32 *tolerance)
887 {
888 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
889 u32 tuner_min = fe->ops.tuner_ops.info.frequency_min_hz;
890 u32 tuner_max = fe->ops.tuner_ops.info.frequency_max_hz;
891 u32 frontend_min = fe->ops.info.frequency_min_hz;
892 u32 frontend_max = fe->ops.info.frequency_max_hz;
893
894 *freq_min = max(frontend_min, tuner_min);
895
896 if (frontend_max == 0)
897 *freq_max = tuner_max;
898 else if (tuner_max == 0)
899 *freq_max = frontend_max;
900 else
901 *freq_max = min(frontend_max, tuner_max);
902
903 if (*freq_min == 0 || *freq_max == 0)
904 dev_warn(fe->dvb->device,
905 "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
906 fe->dvb->num, fe->id);
907
908 dev_dbg(fe->dvb->device, "frequency interval: tuner: %u...%u, frontend: %u...%u",
909 tuner_min, tuner_max, frontend_min, frontend_max);
910
911 /* If the standard is for satellite, convert frequencies to kHz */
912 switch (c->delivery_system) {
913 case SYS_DVBS:
914 case SYS_DVBS2:
915 case SYS_TURBO:
916 case SYS_ISDBS:
917 *freq_min /= kHz;
918 *freq_max /= kHz;
919 if (tolerance)
920 *tolerance = fe->ops.info.frequency_tolerance_hz / kHz;
921
922 break;
923 default:
924 if (tolerance)
925 *tolerance = fe->ops.info.frequency_tolerance_hz;
926 break;
927 }
928 }
929
930 static u32 dvb_frontend_get_stepsize(struct dvb_frontend *fe)
931 {
932 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
933 u32 fe_step = fe->ops.info.frequency_stepsize_hz;
934 u32 tuner_step = fe->ops.tuner_ops.info.frequency_step_hz;
935 u32 step = max(fe_step, tuner_step);
936
937 switch (c->delivery_system) {
938 case SYS_DVBS:
939 case SYS_DVBS2:
940 case SYS_TURBO:
941 case SYS_ISDBS:
942 step /= kHz;
943 break;
944 default:
945 break;
946 }
947
948 return step;
949 }
950
951 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
952 {
953 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
954 u32 freq_min;
955 u32 freq_max;
956
957 /* range check: frequency */
958 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max, NULL);
959 if ((freq_min && c->frequency < freq_min) ||
960 (freq_max && c->frequency > freq_max)) {
961 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
962 fe->dvb->num, fe->id, c->frequency,
963 freq_min, freq_max);
964 return -EINVAL;
965 }
966
967 /* range check: symbol rate */
968 switch (c->delivery_system) {
969 case SYS_DVBS:
970 case SYS_DVBS2:
971 case SYS_TURBO:
972 case SYS_DVBC_ANNEX_A:
973 case SYS_DVBC_ANNEX_C:
974 if ((fe->ops.info.symbol_rate_min &&
975 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
976 (fe->ops.info.symbol_rate_max &&
977 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
978 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
979 fe->dvb->num, fe->id, c->symbol_rate,
980 fe->ops.info.symbol_rate_min,
981 fe->ops.info.symbol_rate_max);
982 return -EINVAL;
983 }
984 default:
985 break;
986 }
987
988 return 0;
989 }
990
991 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
992 {
993 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
994 int i;
995 u32 delsys;
996
997 delsys = c->delivery_system;
998 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
999 c->delivery_system = delsys;
1000
1001 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1002 __func__, c->delivery_system);
1003
1004 c->transmission_mode = TRANSMISSION_MODE_AUTO;
1005 c->bandwidth_hz = 0; /* AUTO */
1006 c->guard_interval = GUARD_INTERVAL_AUTO;
1007 c->hierarchy = HIERARCHY_AUTO;
1008 c->symbol_rate = 0;
1009 c->code_rate_HP = FEC_AUTO;
1010 c->code_rate_LP = FEC_AUTO;
1011 c->fec_inner = FEC_AUTO;
1012 c->rolloff = ROLLOFF_AUTO;
1013 c->voltage = SEC_VOLTAGE_OFF;
1014 c->sectone = SEC_TONE_OFF;
1015 c->pilot = PILOT_AUTO;
1016
1017 c->isdbt_partial_reception = 0;
1018 c->isdbt_sb_mode = 0;
1019 c->isdbt_sb_subchannel = 0;
1020 c->isdbt_sb_segment_idx = 0;
1021 c->isdbt_sb_segment_count = 0;
1022 c->isdbt_layer_enabled = 7; /* All layers (A,B,C) */
1023 for (i = 0; i < 3; i++) {
1024 c->layer[i].fec = FEC_AUTO;
1025 c->layer[i].modulation = QAM_AUTO;
1026 c->layer[i].interleaving = 0;
1027 c->layer[i].segment_count = 0;
1028 }
1029
1030 c->stream_id = NO_STREAM_ID_FILTER;
1031 c->scrambling_sequence_index = 0;/* default sequence */
1032
1033 switch (c->delivery_system) {
1034 case SYS_DVBS:
1035 case SYS_DVBS2:
1036 case SYS_TURBO:
1037 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1038 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1039 break;
1040 case SYS_ATSC:
1041 c->modulation = VSB_8;
1042 break;
1043 case SYS_ISDBS:
1044 c->symbol_rate = 28860000;
1045 c->rolloff = ROLLOFF_35;
1046 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1047 break;
1048 default:
1049 c->modulation = QAM_AUTO;
1050 break;
1051 }
1052
1053 c->lna = LNA_AUTO;
1054
1055 return 0;
1056 }
1057
1058 #define _DTV_CMD(n, s, b) \
1059 [n] = { \
1060 .name = #n, \
1061 .cmd = n, \
1062 .set = s,\
1063 .buffer = b \
1064 }
1065
1066 struct dtv_cmds_h {
1067 char *name; /* A display name for debugging purposes */
1068
1069 __u32 cmd; /* A unique ID */
1070
1071 /* Flags */
1072 __u32 set:1; /* Either a set or get property */
1073 __u32 buffer:1; /* Does this property use the buffer? */
1074 __u32 reserved:30; /* Align */
1075 };
1076
1077 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1078 _DTV_CMD(DTV_TUNE, 1, 0),
1079 _DTV_CMD(DTV_CLEAR, 1, 0),
1080
1081 /* Set */
1082 _DTV_CMD(DTV_FREQUENCY, 1, 0),
1083 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1084 _DTV_CMD(DTV_MODULATION, 1, 0),
1085 _DTV_CMD(DTV_INVERSION, 1, 0),
1086 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1087 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1088 _DTV_CMD(DTV_INNER_FEC, 1, 0),
1089 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1090 _DTV_CMD(DTV_TONE, 1, 0),
1091 _DTV_CMD(DTV_PILOT, 1, 0),
1092 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1093 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1094 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1095 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1096 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1097 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1098 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1099 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1100
1101 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1102 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1103 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1104 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1105 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1106 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1107 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1108 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1109 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1110 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1111 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1112 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1113 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1114 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1115 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1116 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1117 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1118 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1119
1120 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1121 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1122 _DTV_CMD(DTV_SCRAMBLING_SEQUENCE_INDEX, 1, 0),
1123 _DTV_CMD(DTV_LNA, 1, 0),
1124
1125 /* Get */
1126 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1127 _DTV_CMD(DTV_API_VERSION, 0, 0),
1128
1129 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1130
1131 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1132 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1133
1134 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1135 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1136 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1137 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1138 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1139 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1140 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1141 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1142 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1143 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1144 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1145 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1146 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1147
1148 /* Statistics API */
1149 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1150 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1151 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1152 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1153 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1154 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1155 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1156 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1157 };
1158
1159 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1160 * drivers can use a single set_frontend tuning function, regardless of whether
1161 * it's being used for the legacy or new API, reducing code and complexity.
1162 */
1163 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1164 struct dtv_frontend_properties *c,
1165 const struct dvb_frontend_parameters *p)
1166 {
1167 c->frequency = p->frequency;
1168 c->inversion = p->inversion;
1169
1170 switch (dvbv3_type(c->delivery_system)) {
1171 case DVBV3_QPSK:
1172 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1173 c->symbol_rate = p->u.qpsk.symbol_rate;
1174 c->fec_inner = p->u.qpsk.fec_inner;
1175 break;
1176 case DVBV3_QAM:
1177 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1178 c->symbol_rate = p->u.qam.symbol_rate;
1179 c->fec_inner = p->u.qam.fec_inner;
1180 c->modulation = p->u.qam.modulation;
1181 break;
1182 case DVBV3_OFDM:
1183 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1184
1185 switch (p->u.ofdm.bandwidth) {
1186 case BANDWIDTH_10_MHZ:
1187 c->bandwidth_hz = 10000000;
1188 break;
1189 case BANDWIDTH_8_MHZ:
1190 c->bandwidth_hz = 8000000;
1191 break;
1192 case BANDWIDTH_7_MHZ:
1193 c->bandwidth_hz = 7000000;
1194 break;
1195 case BANDWIDTH_6_MHZ:
1196 c->bandwidth_hz = 6000000;
1197 break;
1198 case BANDWIDTH_5_MHZ:
1199 c->bandwidth_hz = 5000000;
1200 break;
1201 case BANDWIDTH_1_712_MHZ:
1202 c->bandwidth_hz = 1712000;
1203 break;
1204 case BANDWIDTH_AUTO:
1205 c->bandwidth_hz = 0;
1206 }
1207
1208 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1209 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1210 c->modulation = p->u.ofdm.constellation;
1211 c->transmission_mode = p->u.ofdm.transmission_mode;
1212 c->guard_interval = p->u.ofdm.guard_interval;
1213 c->hierarchy = p->u.ofdm.hierarchy_information;
1214 break;
1215 case DVBV3_ATSC:
1216 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1217 c->modulation = p->u.vsb.modulation;
1218 if (c->delivery_system == SYS_ATSCMH)
1219 break;
1220 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1221 c->delivery_system = SYS_ATSC;
1222 else
1223 c->delivery_system = SYS_DVBC_ANNEX_B;
1224 break;
1225 case DVBV3_UNKNOWN:
1226 dev_err(fe->dvb->device,
1227 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1228 __func__, c->delivery_system);
1229 return -EINVAL;
1230 }
1231
1232 return 0;
1233 }
1234
1235 /* Ensure the cached values are set correctly in the frontend
1236 * legacy tuning structures, for the advanced tuning API.
1237 */
1238 static int
1239 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1240 const struct dtv_frontend_properties *c,
1241 struct dvb_frontend_parameters *p)
1242 {
1243 p->frequency = c->frequency;
1244 p->inversion = c->inversion;
1245
1246 switch (dvbv3_type(c->delivery_system)) {
1247 case DVBV3_UNKNOWN:
1248 dev_err(fe->dvb->device,
1249 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1250 __func__, c->delivery_system);
1251 return -EINVAL;
1252 case DVBV3_QPSK:
1253 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1254 p->u.qpsk.symbol_rate = c->symbol_rate;
1255 p->u.qpsk.fec_inner = c->fec_inner;
1256 break;
1257 case DVBV3_QAM:
1258 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1259 p->u.qam.symbol_rate = c->symbol_rate;
1260 p->u.qam.fec_inner = c->fec_inner;
1261 p->u.qam.modulation = c->modulation;
1262 break;
1263 case DVBV3_OFDM:
1264 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1265 switch (c->bandwidth_hz) {
1266 case 10000000:
1267 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1268 break;
1269 case 8000000:
1270 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1271 break;
1272 case 7000000:
1273 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1274 break;
1275 case 6000000:
1276 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1277 break;
1278 case 5000000:
1279 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1280 break;
1281 case 1712000:
1282 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1283 break;
1284 case 0:
1285 default:
1286 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1287 }
1288 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1289 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1290 p->u.ofdm.constellation = c->modulation;
1291 p->u.ofdm.transmission_mode = c->transmission_mode;
1292 p->u.ofdm.guard_interval = c->guard_interval;
1293 p->u.ofdm.hierarchy_information = c->hierarchy;
1294 break;
1295 case DVBV3_ATSC:
1296 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1297 p->u.vsb.modulation = c->modulation;
1298 break;
1299 }
1300 return 0;
1301 }
1302
1303 /**
1304 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1305 * @fe: struct dvb_frontend pointer
1306 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1307 * @p_out: struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1308 *
1309 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1310 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1311 * If p_out is not null, it will update the DVBv3 params pointed by it.
1312 */
1313 static int dtv_get_frontend(struct dvb_frontend *fe,
1314 struct dtv_frontend_properties *c,
1315 struct dvb_frontend_parameters *p_out)
1316 {
1317 int r;
1318
1319 if (fe->ops.get_frontend) {
1320 r = fe->ops.get_frontend(fe, c);
1321 if (unlikely(r < 0))
1322 return r;
1323 if (p_out)
1324 dtv_property_legacy_params_sync(fe, c, p_out);
1325 return 0;
1326 }
1327
1328 /* As everything is in cache, get_frontend fops are always supported */
1329 return 0;
1330 }
1331
1332 static int dvb_frontend_handle_ioctl(struct file *file,
1333 unsigned int cmd, void *parg);
1334
1335 static int dtv_property_process_get(struct dvb_frontend *fe,
1336 const struct dtv_frontend_properties *c,
1337 struct dtv_property *tvp,
1338 struct file *file)
1339 {
1340 int ncaps;
1341
1342 switch (tvp->cmd) {
1343 case DTV_ENUM_DELSYS:
1344 ncaps = 0;
1345 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1346 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1347 ncaps++;
1348 }
1349 tvp->u.buffer.len = ncaps;
1350 break;
1351 case DTV_FREQUENCY:
1352 tvp->u.data = c->frequency;
1353 break;
1354 case DTV_MODULATION:
1355 tvp->u.data = c->modulation;
1356 break;
1357 case DTV_BANDWIDTH_HZ:
1358 tvp->u.data = c->bandwidth_hz;
1359 break;
1360 case DTV_INVERSION:
1361 tvp->u.data = c->inversion;
1362 break;
1363 case DTV_SYMBOL_RATE:
1364 tvp->u.data = c->symbol_rate;
1365 break;
1366 case DTV_INNER_FEC:
1367 tvp->u.data = c->fec_inner;
1368 break;
1369 case DTV_PILOT:
1370 tvp->u.data = c->pilot;
1371 break;
1372 case DTV_ROLLOFF:
1373 tvp->u.data = c->rolloff;
1374 break;
1375 case DTV_DELIVERY_SYSTEM:
1376 tvp->u.data = c->delivery_system;
1377 break;
1378 case DTV_VOLTAGE:
1379 tvp->u.data = c->voltage;
1380 break;
1381 case DTV_TONE:
1382 tvp->u.data = c->sectone;
1383 break;
1384 case DTV_API_VERSION:
1385 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1386 break;
1387 case DTV_CODE_RATE_HP:
1388 tvp->u.data = c->code_rate_HP;
1389 break;
1390 case DTV_CODE_RATE_LP:
1391 tvp->u.data = c->code_rate_LP;
1392 break;
1393 case DTV_GUARD_INTERVAL:
1394 tvp->u.data = c->guard_interval;
1395 break;
1396 case DTV_TRANSMISSION_MODE:
1397 tvp->u.data = c->transmission_mode;
1398 break;
1399 case DTV_HIERARCHY:
1400 tvp->u.data = c->hierarchy;
1401 break;
1402 case DTV_INTERLEAVING:
1403 tvp->u.data = c->interleaving;
1404 break;
1405
1406 /* ISDB-T Support here */
1407 case DTV_ISDBT_PARTIAL_RECEPTION:
1408 tvp->u.data = c->isdbt_partial_reception;
1409 break;
1410 case DTV_ISDBT_SOUND_BROADCASTING:
1411 tvp->u.data = c->isdbt_sb_mode;
1412 break;
1413 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1414 tvp->u.data = c->isdbt_sb_subchannel;
1415 break;
1416 case DTV_ISDBT_SB_SEGMENT_IDX:
1417 tvp->u.data = c->isdbt_sb_segment_idx;
1418 break;
1419 case DTV_ISDBT_SB_SEGMENT_COUNT:
1420 tvp->u.data = c->isdbt_sb_segment_count;
1421 break;
1422 case DTV_ISDBT_LAYER_ENABLED:
1423 tvp->u.data = c->isdbt_layer_enabled;
1424 break;
1425 case DTV_ISDBT_LAYERA_FEC:
1426 tvp->u.data = c->layer[0].fec;
1427 break;
1428 case DTV_ISDBT_LAYERA_MODULATION:
1429 tvp->u.data = c->layer[0].modulation;
1430 break;
1431 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1432 tvp->u.data = c->layer[0].segment_count;
1433 break;
1434 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1435 tvp->u.data = c->layer[0].interleaving;
1436 break;
1437 case DTV_ISDBT_LAYERB_FEC:
1438 tvp->u.data = c->layer[1].fec;
1439 break;
1440 case DTV_ISDBT_LAYERB_MODULATION:
1441 tvp->u.data = c->layer[1].modulation;
1442 break;
1443 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1444 tvp->u.data = c->layer[1].segment_count;
1445 break;
1446 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1447 tvp->u.data = c->layer[1].interleaving;
1448 break;
1449 case DTV_ISDBT_LAYERC_FEC:
1450 tvp->u.data = c->layer[2].fec;
1451 break;
1452 case DTV_ISDBT_LAYERC_MODULATION:
1453 tvp->u.data = c->layer[2].modulation;
1454 break;
1455 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1456 tvp->u.data = c->layer[2].segment_count;
1457 break;
1458 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1459 tvp->u.data = c->layer[2].interleaving;
1460 break;
1461
1462 /* Multistream support */
1463 case DTV_STREAM_ID:
1464 case DTV_DVBT2_PLP_ID_LEGACY:
1465 tvp->u.data = c->stream_id;
1466 break;
1467
1468 /* Physical layer scrambling support */
1469 case DTV_SCRAMBLING_SEQUENCE_INDEX:
1470 tvp->u.data = c->scrambling_sequence_index;
1471 break;
1472
1473 /* ATSC-MH */
1474 case DTV_ATSCMH_FIC_VER:
1475 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1476 break;
1477 case DTV_ATSCMH_PARADE_ID:
1478 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1479 break;
1480 case DTV_ATSCMH_NOG:
1481 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1482 break;
1483 case DTV_ATSCMH_TNOG:
1484 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1485 break;
1486 case DTV_ATSCMH_SGN:
1487 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1488 break;
1489 case DTV_ATSCMH_PRC:
1490 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1491 break;
1492 case DTV_ATSCMH_RS_FRAME_MODE:
1493 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1494 break;
1495 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1496 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1497 break;
1498 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1499 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1500 break;
1501 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1502 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1503 break;
1504 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1505 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1506 break;
1507 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1508 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1509 break;
1510 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1511 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1512 break;
1513 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1514 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1515 break;
1516 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1517 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1518 break;
1519
1520 case DTV_LNA:
1521 tvp->u.data = c->lna;
1522 break;
1523
1524 /* Fill quality measures */
1525 case DTV_STAT_SIGNAL_STRENGTH:
1526 tvp->u.st = c->strength;
1527 break;
1528 case DTV_STAT_CNR:
1529 tvp->u.st = c->cnr;
1530 break;
1531 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1532 tvp->u.st = c->pre_bit_error;
1533 break;
1534 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1535 tvp->u.st = c->pre_bit_count;
1536 break;
1537 case DTV_STAT_POST_ERROR_BIT_COUNT:
1538 tvp->u.st = c->post_bit_error;
1539 break;
1540 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1541 tvp->u.st = c->post_bit_count;
1542 break;
1543 case DTV_STAT_ERROR_BLOCK_COUNT:
1544 tvp->u.st = c->block_error;
1545 break;
1546 case DTV_STAT_TOTAL_BLOCK_COUNT:
1547 tvp->u.st = c->block_count;
1548 break;
1549 default:
1550 dev_dbg(fe->dvb->device,
1551 "%s: FE property %d doesn't exist\n",
1552 __func__, tvp->cmd);
1553 return -EINVAL;
1554 }
1555
1556 if (!dtv_cmds[tvp->cmd].buffer)
1557 dev_dbg(fe->dvb->device,
1558 "%s: GET cmd 0x%08x (%s) = 0x%08x\n",
1559 __func__, tvp->cmd, dtv_cmds[tvp->cmd].name,
1560 tvp->u.data);
1561 else
1562 dev_dbg(fe->dvb->device,
1563 "%s: GET cmd 0x%08x (%s) len %d: %*ph\n",
1564 __func__,
1565 tvp->cmd, dtv_cmds[tvp->cmd].name,
1566 tvp->u.buffer.len,
1567 tvp->u.buffer.len, tvp->u.buffer.data);
1568
1569 return 0;
1570 }
1571
1572 static int dtv_set_frontend(struct dvb_frontend *fe);
1573
1574 static bool is_dvbv3_delsys(u32 delsys)
1575 {
1576 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1577 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1578 }
1579
1580 /**
1581 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1582 * @fe: struct frontend;
1583 * @delsys: DVBv5 type that will be used for emulation
1584 *
1585 * Provides emulation for delivery systems that are compatible with the old
1586 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1587 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontend
1588 * parameters are compatible with DVB-S spec.
1589 */
1590 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1591 {
1592 int i;
1593 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1594
1595 c->delivery_system = delsys;
1596
1597 /*
1598 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1599 */
1600 if (c->delivery_system == SYS_ISDBT) {
1601 dev_dbg(fe->dvb->device,
1602 "%s: Using defaults for SYS_ISDBT\n",
1603 __func__);
1604
1605 if (!c->bandwidth_hz)
1606 c->bandwidth_hz = 6000000;
1607
1608 c->isdbt_partial_reception = 0;
1609 c->isdbt_sb_mode = 0;
1610 c->isdbt_sb_subchannel = 0;
1611 c->isdbt_sb_segment_idx = 0;
1612 c->isdbt_sb_segment_count = 0;
1613 c->isdbt_layer_enabled = 7;
1614 for (i = 0; i < 3; i++) {
1615 c->layer[i].fec = FEC_AUTO;
1616 c->layer[i].modulation = QAM_AUTO;
1617 c->layer[i].interleaving = 0;
1618 c->layer[i].segment_count = 0;
1619 }
1620 }
1621 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1622 __func__, c->delivery_system);
1623
1624 return 0;
1625 }
1626
1627 /**
1628 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1629 * @fe: frontend struct
1630 * @desired_system: delivery system requested by the user
1631 *
1632 * A DVBv5 call know what's the desired system it wants. So, set it.
1633 *
1634 * There are, however, a few known issues with early DVBv5 applications that
1635 * are also handled by this logic:
1636 *
1637 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1638 * This is an API violation, but, as we don't want to break userspace,
1639 * convert it to the first supported delivery system.
1640 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1641 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1642 * ISDB-T provided backward compat with DVB-T.
1643 */
1644 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1645 u32 desired_system)
1646 {
1647 int ncaps;
1648 u32 delsys = SYS_UNDEFINED;
1649 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1650 enum dvbv3_emulation_type type;
1651
1652 /*
1653 * It was reported that some old DVBv5 applications were
1654 * filling delivery_system with SYS_UNDEFINED. If this happens,
1655 * assume that the application wants to use the first supported
1656 * delivery system.
1657 */
1658 if (desired_system == SYS_UNDEFINED)
1659 desired_system = fe->ops.delsys[0];
1660
1661 /*
1662 * This is a DVBv5 call. So, it likely knows the supported
1663 * delivery systems. So, check if the desired delivery system is
1664 * supported
1665 */
1666 ncaps = 0;
1667 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1668 if (fe->ops.delsys[ncaps] == desired_system) {
1669 c->delivery_system = desired_system;
1670 dev_dbg(fe->dvb->device,
1671 "%s: Changing delivery system to %d\n",
1672 __func__, desired_system);
1673 return 0;
1674 }
1675 ncaps++;
1676 }
1677
1678 /*
1679 * The requested delivery system isn't supported. Maybe userspace
1680 * is requesting a DVBv3 compatible delivery system.
1681 *
1682 * The emulation only works if the desired system is one of the
1683 * delivery systems supported by DVBv3 API
1684 */
1685 if (!is_dvbv3_delsys(desired_system)) {
1686 dev_dbg(fe->dvb->device,
1687 "%s: Delivery system %d not supported.\n",
1688 __func__, desired_system);
1689 return -EINVAL;
1690 }
1691
1692 type = dvbv3_type(desired_system);
1693
1694 /*
1695 * Get the last non-DVBv3 delivery system that has the same type
1696 * of the desired system
1697 */
1698 ncaps = 0;
1699 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1700 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1701 delsys = fe->ops.delsys[ncaps];
1702 ncaps++;
1703 }
1704
1705 /* There's nothing compatible with the desired delivery system */
1706 if (delsys == SYS_UNDEFINED) {
1707 dev_dbg(fe->dvb->device,
1708 "%s: Delivery system %d not supported on emulation mode.\n",
1709 __func__, desired_system);
1710 return -EINVAL;
1711 }
1712
1713 dev_dbg(fe->dvb->device,
1714 "%s: Using delivery system %d emulated as if it were %d\n",
1715 __func__, delsys, desired_system);
1716
1717 return emulate_delivery_system(fe, desired_system);
1718 }
1719
1720 /**
1721 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1722 * @fe: frontend struct
1723 *
1724 * A DVBv3 call doesn't know what's the desired system it wants. It also
1725 * doesn't allow to switch between different types. Due to that, userspace
1726 * should use DVBv5 instead.
1727 * However, in order to avoid breaking userspace API, limited backward
1728 * compatibility support is provided.
1729 *
1730 * There are some delivery systems that are incompatible with DVBv3 calls.
1731 *
1732 * This routine should work fine for frontends that support just one delivery
1733 * system.
1734 *
1735 * For frontends that support multiple frontends:
1736 * 1) It defaults to use the first supported delivery system. There's an
1737 * userspace application that allows changing it at runtime;
1738 *
1739 * 2) If the current delivery system is not compatible with DVBv3, it gets
1740 * the first one that it is compatible.
1741 *
1742 * NOTE: in order for this to work with applications like Kaffeine that
1743 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1744 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1745 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1746 * to DVB-S.
1747 */
1748 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1749 {
1750 int ncaps;
1751 u32 delsys = SYS_UNDEFINED;
1752 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1753
1754 /* If not set yet, defaults to the first supported delivery system */
1755 if (c->delivery_system == SYS_UNDEFINED)
1756 c->delivery_system = fe->ops.delsys[0];
1757
1758 /*
1759 * Trivial case: just use the current one, if it already a DVBv3
1760 * delivery system
1761 */
1762 if (is_dvbv3_delsys(c->delivery_system)) {
1763 dev_dbg(fe->dvb->device,
1764 "%s: Using delivery system to %d\n",
1765 __func__, c->delivery_system);
1766 return 0;
1767 }
1768
1769 /*
1770 * Seek for the first delivery system that it is compatible with a
1771 * DVBv3 standard
1772 */
1773 ncaps = 0;
1774 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1775 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1776 delsys = fe->ops.delsys[ncaps];
1777 break;
1778 }
1779 ncaps++;
1780 }
1781 if (delsys == SYS_UNDEFINED) {
1782 dev_dbg(fe->dvb->device,
1783 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1784 __func__);
1785 return -EINVAL;
1786 }
1787 return emulate_delivery_system(fe, delsys);
1788 }
1789
1790 /**
1791 * dtv_property_process_set - Sets a single DTV property
1792 * @fe: Pointer to &struct dvb_frontend
1793 * @file: Pointer to &struct file
1794 * @cmd: Digital TV command
1795 * @data: An unsigned 32-bits number
1796 *
1797 * This routine assigns the property
1798 * value to the corresponding member of
1799 * &struct dtv_frontend_properties
1800 *
1801 * Returns:
1802 * Zero on success, negative errno on failure.
1803 */
1804 static int dtv_property_process_set(struct dvb_frontend *fe,
1805 struct file *file,
1806 u32 cmd, u32 data)
1807 {
1808 int r = 0;
1809 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1810
1811 /** Dump DTV command name and value*/
1812 if (!cmd || cmd > DTV_MAX_COMMAND)
1813 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n",
1814 __func__, cmd);
1815 else
1816 dev_dbg(fe->dvb->device,
1817 "%s: SET cmd 0x%08x (%s) to 0x%08x\n",
1818 __func__, cmd, dtv_cmds[cmd].name, data);
1819 switch (cmd) {
1820 case DTV_CLEAR:
1821 /*
1822 * Reset a cache of data specific to the frontend here. This does
1823 * not effect hardware.
1824 */
1825 dvb_frontend_clear_cache(fe);
1826 break;
1827 case DTV_TUNE:
1828 /*
1829 * Use the cached Digital TV properties to tune the
1830 * frontend
1831 */
1832 dev_dbg(fe->dvb->device,
1833 "%s: Setting the frontend from property cache\n",
1834 __func__);
1835
1836 r = dtv_set_frontend(fe);
1837 break;
1838 case DTV_FREQUENCY:
1839 c->frequency = data;
1840 break;
1841 case DTV_MODULATION:
1842 c->modulation = data;
1843 break;
1844 case DTV_BANDWIDTH_HZ:
1845 c->bandwidth_hz = data;
1846 break;
1847 case DTV_INVERSION:
1848 c->inversion = data;
1849 break;
1850 case DTV_SYMBOL_RATE:
1851 c->symbol_rate = data;
1852 break;
1853 case DTV_INNER_FEC:
1854 c->fec_inner = data;
1855 break;
1856 case DTV_PILOT:
1857 c->pilot = data;
1858 break;
1859 case DTV_ROLLOFF:
1860 c->rolloff = data;
1861 break;
1862 case DTV_DELIVERY_SYSTEM:
1863 r = dvbv5_set_delivery_system(fe, data);
1864 break;
1865 case DTV_VOLTAGE:
1866 c->voltage = data;
1867 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
1868 (void *)c->voltage);
1869 break;
1870 case DTV_TONE:
1871 c->sectone = data;
1872 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
1873 (void *)c->sectone);
1874 break;
1875 case DTV_CODE_RATE_HP:
1876 c->code_rate_HP = data;
1877 break;
1878 case DTV_CODE_RATE_LP:
1879 c->code_rate_LP = data;
1880 break;
1881 case DTV_GUARD_INTERVAL:
1882 c->guard_interval = data;
1883 break;
1884 case DTV_TRANSMISSION_MODE:
1885 c->transmission_mode = data;
1886 break;
1887 case DTV_HIERARCHY:
1888 c->hierarchy = data;
1889 break;
1890 case DTV_INTERLEAVING:
1891 c->interleaving = data;
1892 break;
1893
1894 /* ISDB-T Support here */
1895 case DTV_ISDBT_PARTIAL_RECEPTION:
1896 c->isdbt_partial_reception = data;
1897 break;
1898 case DTV_ISDBT_SOUND_BROADCASTING:
1899 c->isdbt_sb_mode = data;
1900 break;
1901 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1902 c->isdbt_sb_subchannel = data;
1903 break;
1904 case DTV_ISDBT_SB_SEGMENT_IDX:
1905 c->isdbt_sb_segment_idx = data;
1906 break;
1907 case DTV_ISDBT_SB_SEGMENT_COUNT:
1908 c->isdbt_sb_segment_count = data;
1909 break;
1910 case DTV_ISDBT_LAYER_ENABLED:
1911 c->isdbt_layer_enabled = data;
1912 break;
1913 case DTV_ISDBT_LAYERA_FEC:
1914 c->layer[0].fec = data;
1915 break;
1916 case DTV_ISDBT_LAYERA_MODULATION:
1917 c->layer[0].modulation = data;
1918 break;
1919 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1920 c->layer[0].segment_count = data;
1921 break;
1922 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1923 c->layer[0].interleaving = data;
1924 break;
1925 case DTV_ISDBT_LAYERB_FEC:
1926 c->layer[1].fec = data;
1927 break;
1928 case DTV_ISDBT_LAYERB_MODULATION:
1929 c->layer[1].modulation = data;
1930 break;
1931 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1932 c->layer[1].segment_count = data;
1933 break;
1934 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1935 c->layer[1].interleaving = data;
1936 break;
1937 case DTV_ISDBT_LAYERC_FEC:
1938 c->layer[2].fec = data;
1939 break;
1940 case DTV_ISDBT_LAYERC_MODULATION:
1941 c->layer[2].modulation = data;
1942 break;
1943 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1944 c->layer[2].segment_count = data;
1945 break;
1946 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1947 c->layer[2].interleaving = data;
1948 break;
1949
1950 /* Multistream support */
1951 case DTV_STREAM_ID:
1952 case DTV_DVBT2_PLP_ID_LEGACY:
1953 c->stream_id = data;
1954 break;
1955
1956 /* Physical layer scrambling support */
1957 case DTV_SCRAMBLING_SEQUENCE_INDEX:
1958 c->scrambling_sequence_index = data;
1959 break;
1960
1961 /* ATSC-MH */
1962 case DTV_ATSCMH_PARADE_ID:
1963 fe->dtv_property_cache.atscmh_parade_id = data;
1964 break;
1965 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1966 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data;
1967 break;
1968
1969 case DTV_LNA:
1970 c->lna = data;
1971 if (fe->ops.set_lna)
1972 r = fe->ops.set_lna(fe);
1973 if (r < 0)
1974 c->lna = LNA_AUTO;
1975 break;
1976
1977 default:
1978 return -EINVAL;
1979 }
1980
1981 return r;
1982 }
1983
1984 static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd,
1985 void *parg)
1986 {
1987 struct dvb_device *dvbdev = file->private_data;
1988 struct dvb_frontend *fe = dvbdev->priv;
1989 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1990 int err;
1991
1992 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1993 if (down_interruptible(&fepriv->sem))
1994 return -ERESTARTSYS;
1995
1996 if (fe->exit != DVB_FE_NO_EXIT) {
1997 up(&fepriv->sem);
1998 return -ENODEV;
1999 }
2000
2001 /*
2002 * If the frontend is opened in read-only mode, only the ioctls
2003 * that don't interfere with the tune logic should be accepted.
2004 * That allows an external application to monitor the DVB QoS and
2005 * statistics parameters.
2006 *
2007 * That matches all _IOR() ioctls, except for two special cases:
2008 * - FE_GET_EVENT is part of the tuning logic on a DVB application;
2009 * - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0
2010 * setup
2011 * So, those two ioctls should also return -EPERM, as otherwise
2012 * reading from them would interfere with a DVB tune application
2013 */
2014 if ((file->f_flags & O_ACCMODE) == O_RDONLY
2015 && (_IOC_DIR(cmd) != _IOC_READ
2016 || cmd == FE_GET_EVENT
2017 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2018 up(&fepriv->sem);
2019 return -EPERM;
2020 }
2021
2022 err = dvb_frontend_handle_ioctl(file, cmd, parg);
2023
2024 up(&fepriv->sem);
2025 return err;
2026 }
2027
2028 static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
2029 unsigned long arg)
2030 {
2031 struct dvb_device *dvbdev = file->private_data;
2032
2033 if (!dvbdev)
2034 return -ENODEV;
2035
2036 return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
2037 }
2038
2039 #ifdef CONFIG_COMPAT
2040 struct compat_dtv_property {
2041 __u32 cmd;
2042 __u32 reserved[3];
2043 union {
2044 __u32 data;
2045 struct dtv_fe_stats st;
2046 struct {
2047 __u8 data[32];
2048 __u32 len;
2049 __u32 reserved1[3];
2050 compat_uptr_t reserved2;
2051 } buffer;
2052 } u;
2053 int result;
2054 } __attribute__ ((packed));
2055
2056 struct compat_dtv_properties {
2057 __u32 num;
2058 compat_uptr_t props;
2059 };
2060
2061 #define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties)
2062 #define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties)
2063
2064 static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd,
2065 unsigned long arg)
2066 {
2067 struct dvb_device *dvbdev = file->private_data;
2068 struct dvb_frontend *fe = dvbdev->priv;
2069 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2070 int i, err = 0;
2071
2072 if (cmd == COMPAT_FE_SET_PROPERTY) {
2073 struct compat_dtv_properties prop, *tvps = NULL;
2074 struct compat_dtv_property *tvp = NULL;
2075
2076 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2077 return -EFAULT;
2078
2079 tvps = &prop;
2080
2081 /*
2082 * Put an arbitrary limit on the number of messages that can
2083 * be sent at once
2084 */
2085 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2086 return -EINVAL;
2087
2088 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2089 if (IS_ERR(tvp))
2090 return PTR_ERR(tvp);
2091
2092 for (i = 0; i < tvps->num; i++) {
2093 err = dtv_property_process_set(fe, file,
2094 (tvp + i)->cmd,
2095 (tvp + i)->u.data);
2096 if (err < 0) {
2097 kfree(tvp);
2098 return err;
2099 }
2100 }
2101 kfree(tvp);
2102 } else if (cmd == COMPAT_FE_GET_PROPERTY) {
2103 struct compat_dtv_properties prop, *tvps = NULL;
2104 struct compat_dtv_property *tvp = NULL;
2105 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2106
2107 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2108 return -EFAULT;
2109
2110 tvps = &prop;
2111
2112 /*
2113 * Put an arbitrary limit on the number of messages that can
2114 * be sent at once
2115 */
2116 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2117 return -EINVAL;
2118
2119 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2120 if (IS_ERR(tvp))
2121 return PTR_ERR(tvp);
2122
2123 /*
2124 * Let's use our own copy of property cache, in order to
2125 * avoid mangling with DTV zigzag logic, as drivers might
2126 * return crap, if they don't check if the data is available
2127 * before updating the properties cache.
2128 */
2129 if (fepriv->state != FESTATE_IDLE) {
2130 err = dtv_get_frontend(fe, &getp, NULL);
2131 if (err < 0) {
2132 kfree(tvp);
2133 return err;
2134 }
2135 }
2136 for (i = 0; i < tvps->num; i++) {
2137 err = dtv_property_process_get(
2138 fe, &getp, (struct dtv_property *)(tvp + i), file);
2139 if (err < 0) {
2140 kfree(tvp);
2141 return err;
2142 }
2143 }
2144
2145 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp,
2146 tvps->num * sizeof(struct compat_dtv_property))) {
2147 kfree(tvp);
2148 return -EFAULT;
2149 }
2150 kfree(tvp);
2151 }
2152
2153 return err;
2154 }
2155
2156 static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd,
2157 unsigned long arg)
2158 {
2159 struct dvb_device *dvbdev = file->private_data;
2160 struct dvb_frontend *fe = dvbdev->priv;
2161 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2162 int err;
2163
2164 if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) {
2165 if (down_interruptible(&fepriv->sem))
2166 return -ERESTARTSYS;
2167
2168 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg);
2169
2170 up(&fepriv->sem);
2171 return err;
2172 }
2173
2174 return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2175 }
2176 #endif
2177
2178 static int dtv_set_frontend(struct dvb_frontend *fe)
2179 {
2180 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2181 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2182 struct dvb_frontend_tune_settings fetunesettings;
2183 u32 rolloff = 0;
2184
2185 if (dvb_frontend_check_parameters(fe) < 0)
2186 return -EINVAL;
2187
2188 /*
2189 * Initialize output parameters to match the values given by
2190 * the user. FE_SET_FRONTEND triggers an initial frontend event
2191 * with status = 0, which copies output parameters to userspace.
2192 */
2193 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2194
2195 /*
2196 * Be sure that the bandwidth will be filled for all
2197 * non-satellite systems, as tuners need to know what
2198 * low pass/Nyquist half filter should be applied, in
2199 * order to avoid inter-channel noise.
2200 *
2201 * ISDB-T and DVB-T/T2 already sets bandwidth.
2202 * ATSC and DVB-C don't set, so, the core should fill it.
2203 *
2204 * On DVB-C Annex A and C, the bandwidth is a function of
2205 * the roll-off and symbol rate. Annex B defines different
2206 * roll-off factors depending on the modulation. Fortunately,
2207 * Annex B is only used with 6MHz, so there's no need to
2208 * calculate it.
2209 *
2210 * While not officially supported, a side effect of handling it at
2211 * the cache level is that a program could retrieve the bandwidth
2212 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2213 */
2214 switch (c->delivery_system) {
2215 case SYS_ATSC:
2216 case SYS_DVBC_ANNEX_B:
2217 c->bandwidth_hz = 6000000;
2218 break;
2219 case SYS_DVBC_ANNEX_A:
2220 rolloff = 115;
2221 break;
2222 case SYS_DVBC_ANNEX_C:
2223 rolloff = 113;
2224 break;
2225 case SYS_DVBS:
2226 case SYS_TURBO:
2227 case SYS_ISDBS:
2228 rolloff = 135;
2229 break;
2230 case SYS_DVBS2:
2231 switch (c->rolloff) {
2232 case ROLLOFF_20:
2233 rolloff = 120;
2234 break;
2235 case ROLLOFF_25:
2236 rolloff = 125;
2237 break;
2238 default:
2239 case ROLLOFF_35:
2240 rolloff = 135;
2241 }
2242 break;
2243 default:
2244 break;
2245 }
2246 if (rolloff)
2247 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2248
2249 /* force auto frequency inversion if requested */
2250 if (dvb_force_auto_inversion)
2251 c->inversion = INVERSION_AUTO;
2252
2253 /*
2254 * without hierarchical coding code_rate_LP is irrelevant,
2255 * so we tolerate the otherwise invalid FEC_NONE setting
2256 */
2257 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2258 c->code_rate_LP = FEC_AUTO;
2259
2260 /* get frontend-specific tuning settings */
2261 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2262 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2263 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2264 fepriv->max_drift = fetunesettings.max_drift;
2265 fepriv->step_size = fetunesettings.step_size;
2266 } else {
2267 /* default values */
2268 switch (c->delivery_system) {
2269 case SYS_DVBS:
2270 case SYS_DVBS2:
2271 case SYS_ISDBS:
2272 case SYS_TURBO:
2273 case SYS_DVBC_ANNEX_A:
2274 case SYS_DVBC_ANNEX_C:
2275 fepriv->min_delay = HZ / 20;
2276 fepriv->step_size = c->symbol_rate / 16000;
2277 fepriv->max_drift = c->symbol_rate / 2000;
2278 break;
2279 case SYS_DVBT:
2280 case SYS_DVBT2:
2281 case SYS_ISDBT:
2282 case SYS_DTMB:
2283 fepriv->min_delay = HZ / 20;
2284 fepriv->step_size = dvb_frontend_get_stepsize(fe) * 2;
2285 fepriv->max_drift = (dvb_frontend_get_stepsize(fe) * 2) + 1;
2286 break;
2287 default:
2288 /*
2289 * FIXME: This sounds wrong! if freqency_stepsize is
2290 * defined by the frontend, why not use it???
2291 */
2292 fepriv->min_delay = HZ / 20;
2293 fepriv->step_size = 0; /* no zigzag */
2294 fepriv->max_drift = 0;
2295 break;
2296 }
2297 }
2298 if (dvb_override_tune_delay > 0)
2299 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2300
2301 fepriv->state = FESTATE_RETUNE;
2302
2303 /* Request the search algorithm to search */
2304 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2305
2306 dvb_frontend_clear_events(fe);
2307 dvb_frontend_add_event(fe, 0);
2308 dvb_frontend_wakeup(fe);
2309 fepriv->status = 0;
2310
2311 return 0;
2312 }
2313
2314 static int dvb_frontend_handle_ioctl(struct file *file,
2315 unsigned int cmd, void *parg)
2316 {
2317 struct dvb_device *dvbdev = file->private_data;
2318 struct dvb_frontend *fe = dvbdev->priv;
2319 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2320 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2321 int i, err = -ENOTSUPP;
2322
2323 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2324
2325 switch (cmd) {
2326 case FE_SET_PROPERTY: {
2327 struct dtv_properties *tvps = parg;
2328 struct dtv_property *tvp = NULL;
2329
2330 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2331 __func__, tvps->num);
2332 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2333 __func__, tvps->props);
2334
2335 /*
2336 * Put an arbitrary limit on the number of messages that can
2337 * be sent at once
2338 */
2339 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2340 return -EINVAL;
2341
2342 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2343 if (IS_ERR(tvp))
2344 return PTR_ERR(tvp);
2345
2346 for (i = 0; i < tvps->num; i++) {
2347 err = dtv_property_process_set(fe, file,
2348 (tvp + i)->cmd,
2349 (tvp + i)->u.data);
2350 if (err < 0) {
2351 kfree(tvp);
2352 return err;
2353 }
2354 }
2355 kfree(tvp);
2356 err = 0;
2357 break;
2358 }
2359 case FE_GET_PROPERTY: {
2360 struct dtv_properties *tvps = parg;
2361 struct dtv_property *tvp = NULL;
2362 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2363
2364 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2365 __func__, tvps->num);
2366 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2367 __func__, tvps->props);
2368
2369 /*
2370 * Put an arbitrary limit on the number of messages that can
2371 * be sent at once
2372 */
2373 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2374 return -EINVAL;
2375
2376 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2377 if (IS_ERR(tvp))
2378 return PTR_ERR(tvp);
2379
2380 /*
2381 * Let's use our own copy of property cache, in order to
2382 * avoid mangling with DTV zigzag logic, as drivers might
2383 * return crap, if they don't check if the data is available
2384 * before updating the properties cache.
2385 */
2386 if (fepriv->state != FESTATE_IDLE) {
2387 err = dtv_get_frontend(fe, &getp, NULL);
2388 if (err < 0) {
2389 kfree(tvp);
2390 return err;
2391 }
2392 }
2393 for (i = 0; i < tvps->num; i++) {
2394 err = dtv_property_process_get(fe, &getp,
2395 tvp + i, file);
2396 if (err < 0) {
2397 kfree(tvp);
2398 return err;
2399 }
2400 }
2401
2402 if (copy_to_user((void __user *)tvps->props, tvp,
2403 tvps->num * sizeof(struct dtv_property))) {
2404 kfree(tvp);
2405 return -EFAULT;
2406 }
2407 kfree(tvp);
2408 err = 0;
2409 break;
2410 }
2411
2412 case FE_GET_INFO: {
2413 struct dvb_frontend_info *info = parg;
2414 memset(info, 0, sizeof(*info));
2415
2416 strscpy(info->name, fe->ops.info.name, sizeof(info->name));
2417 info->symbol_rate_min = fe->ops.info.symbol_rate_min;
2418 info->symbol_rate_max = fe->ops.info.symbol_rate_max;
2419 info->symbol_rate_tolerance = fe->ops.info.symbol_rate_tolerance;
2420 info->caps = fe->ops.info.caps;
2421 info->frequency_stepsize = dvb_frontend_get_stepsize(fe);
2422 dvb_frontend_get_frequency_limits(fe, &info->frequency_min,
2423 &info->frequency_max,
2424 &info->frequency_tolerance);
2425
2426 /*
2427 * Associate the 4 delivery systems supported by DVBv3
2428 * API with their DVBv5 counterpart. For the other standards,
2429 * use the closest type, assuming that it would hopefully
2430 * work with a DVBv3 application.
2431 * It should be noticed that, on multi-frontend devices with
2432 * different types (terrestrial and cable, for example),
2433 * a pure DVBv3 application won't be able to use all delivery
2434 * systems. Yet, changing the DVBv5 cache to the other delivery
2435 * system should be enough for making it work.
2436 */
2437 switch (dvbv3_type(c->delivery_system)) {
2438 case DVBV3_QPSK:
2439 info->type = FE_QPSK;
2440 break;
2441 case DVBV3_ATSC:
2442 info->type = FE_ATSC;
2443 break;
2444 case DVBV3_QAM:
2445 info->type = FE_QAM;
2446 break;
2447 case DVBV3_OFDM:
2448 info->type = FE_OFDM;
2449 break;
2450 default:
2451 dev_err(fe->dvb->device,
2452 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2453 __func__, c->delivery_system);
2454 info->type = FE_OFDM;
2455 }
2456 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2457 __func__, c->delivery_system, info->type);
2458
2459 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2460 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2461 info->caps |= FE_CAN_INVERSION_AUTO;
2462 err = 0;
2463 break;
2464 }
2465
2466 case FE_READ_STATUS: {
2467 enum fe_status *status = parg;
2468
2469 /* if retune was requested but hasn't occurred yet, prevent
2470 * that user get signal state from previous tuning */
2471 if (fepriv->state == FESTATE_RETUNE ||
2472 fepriv->state == FESTATE_ERROR) {
2473 err = 0;
2474 *status = 0;
2475 break;
2476 }
2477
2478 if (fe->ops.read_status)
2479 err = fe->ops.read_status(fe, status);
2480 break;
2481 }
2482
2483 case FE_DISEQC_RESET_OVERLOAD:
2484 if (fe->ops.diseqc_reset_overload) {
2485 err = fe->ops.diseqc_reset_overload(fe);
2486 fepriv->state = FESTATE_DISEQC;
2487 fepriv->status = 0;
2488 }
2489 break;
2490
2491 case FE_DISEQC_SEND_MASTER_CMD:
2492 if (fe->ops.diseqc_send_master_cmd) {
2493 struct dvb_diseqc_master_cmd *cmd = parg;
2494
2495 if (cmd->msg_len > sizeof(cmd->msg)) {
2496 err = -EINVAL;
2497 break;
2498 }
2499 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2500 fepriv->state = FESTATE_DISEQC;
2501 fepriv->status = 0;
2502 }
2503 break;
2504
2505 case FE_DISEQC_SEND_BURST:
2506 if (fe->ops.diseqc_send_burst) {
2507 err = fe->ops.diseqc_send_burst(fe,
2508 (enum fe_sec_mini_cmd)parg);
2509 fepriv->state = FESTATE_DISEQC;
2510 fepriv->status = 0;
2511 }
2512 break;
2513
2514 case FE_SET_TONE:
2515 if (fe->ops.set_tone) {
2516 err = fe->ops.set_tone(fe,
2517 (enum fe_sec_tone_mode)parg);
2518 fepriv->tone = (enum fe_sec_tone_mode)parg;
2519 fepriv->state = FESTATE_DISEQC;
2520 fepriv->status = 0;
2521 }
2522 break;
2523
2524 case FE_SET_VOLTAGE:
2525 if (fe->ops.set_voltage) {
2526 err = fe->ops.set_voltage(fe,
2527 (enum fe_sec_voltage)parg);
2528 fepriv->voltage = (enum fe_sec_voltage)parg;
2529 fepriv->state = FESTATE_DISEQC;
2530 fepriv->status = 0;
2531 }
2532 break;
2533
2534 case FE_DISEQC_RECV_SLAVE_REPLY:
2535 if (fe->ops.diseqc_recv_slave_reply)
2536 err = fe->ops.diseqc_recv_slave_reply(fe, parg);
2537 break;
2538
2539 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2540 if (fe->ops.enable_high_lnb_voltage)
2541 err = fe->ops.enable_high_lnb_voltage(fe, (long)parg);
2542 break;
2543
2544 case FE_SET_FRONTEND_TUNE_MODE:
2545 fepriv->tune_mode_flags = (unsigned long)parg;
2546 err = 0;
2547 break;
2548
2549 /* DEPRECATED dish control ioctls */
2550
2551 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2552 if (fe->ops.dishnetwork_send_legacy_command) {
2553 err = fe->ops.dishnetwork_send_legacy_command(fe,
2554 (unsigned long)parg);
2555 fepriv->state = FESTATE_DISEQC;
2556 fepriv->status = 0;
2557 } else if (fe->ops.set_voltage) {
2558 /*
2559 * NOTE: This is a fallback condition. Some frontends
2560 * (stv0299 for instance) take longer than 8msec to
2561 * respond to a set_voltage command. Those switches
2562 * need custom routines to switch properly. For all
2563 * other frontends, the following should work ok.
2564 * Dish network legacy switches (as used by Dish500)
2565 * are controlled by sending 9-bit command words
2566 * spaced 8msec apart.
2567 * the actual command word is switch/port dependent
2568 * so it is up to the userspace application to send
2569 * the right command.
2570 * The command must always start with a '0' after
2571 * initialization, so parg is 8 bits and does not
2572 * include the initialization or start bit
2573 */
2574 unsigned long swcmd = ((unsigned long)parg) << 1;
2575 ktime_t nexttime;
2576 ktime_t tv[10];
2577 int i;
2578 u8 last = 1;
2579
2580 if (dvb_frontend_debug)
2581 dprintk("switch command: 0x%04lx\n",
2582 swcmd);
2583 nexttime = ktime_get_boottime();
2584 if (dvb_frontend_debug)
2585 tv[0] = nexttime;
2586 /* before sending a command, initialize by sending
2587 * a 32ms 18V to the switch
2588 */
2589 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2590 dvb_frontend_sleep_until(&nexttime, 32000);
2591
2592 for (i = 0; i < 9; i++) {
2593 if (dvb_frontend_debug)
2594 tv[i + 1] = ktime_get_boottime();
2595 if ((swcmd & 0x01) != last) {
2596 /* set voltage to (last ? 13V : 18V) */
2597 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2598 last = (last) ? 0 : 1;
2599 }
2600 swcmd = swcmd >> 1;
2601 if (i != 8)
2602 dvb_frontend_sleep_until(&nexttime, 8000);
2603 }
2604 if (dvb_frontend_debug) {
2605 dprintk("(adapter %d): switch delay (should be 32k followed by all 8k)\n",
2606 fe->dvb->num);
2607 for (i = 1; i < 10; i++)
2608 pr_info("%d: %d\n", i,
2609 (int)ktime_us_delta(tv[i], tv[i - 1]));
2610 }
2611 err = 0;
2612 fepriv->state = FESTATE_DISEQC;
2613 fepriv->status = 0;
2614 }
2615 break;
2616
2617 /* DEPRECATED statistics ioctls */
2618
2619 case FE_READ_BER:
2620 if (fe->ops.read_ber) {
2621 if (fepriv->thread)
2622 err = fe->ops.read_ber(fe, parg);
2623 else
2624 err = -EAGAIN;
2625 }
2626 break;
2627
2628 case FE_READ_SIGNAL_STRENGTH:
2629 if (fe->ops.read_signal_strength) {
2630 if (fepriv->thread)
2631 err = fe->ops.read_signal_strength(fe, parg);
2632 else
2633 err = -EAGAIN;
2634 }
2635 break;
2636
2637 case FE_READ_SNR:
2638 if (fe->ops.read_snr) {
2639 if (fepriv->thread)
2640 err = fe->ops.read_snr(fe, parg);
2641 else
2642 err = -EAGAIN;
2643 }
2644 break;
2645
2646 case FE_READ_UNCORRECTED_BLOCKS:
2647 if (fe->ops.read_ucblocks) {
2648 if (fepriv->thread)
2649 err = fe->ops.read_ucblocks(fe, parg);
2650 else
2651 err = -EAGAIN;
2652 }
2653 break;
2654
2655 /* DEPRECATED DVBv3 ioctls */
2656
2657 case FE_SET_FRONTEND:
2658 err = dvbv3_set_delivery_system(fe);
2659 if (err)
2660 break;
2661
2662 err = dtv_property_cache_sync(fe, c, parg);
2663 if (err)
2664 break;
2665 err = dtv_set_frontend(fe);
2666 break;
2667 case FE_GET_EVENT:
2668 err = dvb_frontend_get_event(fe, parg, file->f_flags);
2669 break;
2670
2671 case FE_GET_FRONTEND: {
2672 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2673
2674 /*
2675 * Let's use our own copy of property cache, in order to
2676 * avoid mangling with DTV zigzag logic, as drivers might
2677 * return crap, if they don't check if the data is available
2678 * before updating the properties cache.
2679 */
2680 err = dtv_get_frontend(fe, &getp, parg);
2681 break;
2682 }
2683
2684 default:
2685 return -ENOTSUPP;
2686 } /* switch */
2687
2688 return err;
2689 }
2690
2691 static __poll_t dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2692 {
2693 struct dvb_device *dvbdev = file->private_data;
2694 struct dvb_frontend *fe = dvbdev->priv;
2695 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2696
2697 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2698
2699 poll_wait(file, &fepriv->events.wait_queue, wait);
2700
2701 if (fepriv->events.eventw != fepriv->events.eventr)
2702 return (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
2703
2704 return 0;
2705 }
2706
2707 static int dvb_frontend_open(struct inode *inode, struct file *file)
2708 {
2709 struct dvb_device *dvbdev = file->private_data;
2710 struct dvb_frontend *fe = dvbdev->priv;
2711 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2712 struct dvb_adapter *adapter = fe->dvb;
2713 int ret;
2714
2715 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2716 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2717 return -ENODEV;
2718
2719 if (adapter->mfe_shared) {
2720 mutex_lock(&adapter->mfe_lock);
2721
2722 if (!adapter->mfe_dvbdev)
2723 adapter->mfe_dvbdev = dvbdev;
2724
2725 else if (adapter->mfe_dvbdev != dvbdev) {
2726 struct dvb_device
2727 *mfedev = adapter->mfe_dvbdev;
2728 struct dvb_frontend
2729 *mfe = mfedev->priv;
2730 struct dvb_frontend_private
2731 *mfepriv = mfe->frontend_priv;
2732 int mferetry = (dvb_mfe_wait_time << 1);
2733
2734 mutex_unlock(&adapter->mfe_lock);
2735 while (mferetry-- && (mfedev->users != -1 ||
2736 mfepriv->thread)) {
2737 if (msleep_interruptible(500)) {
2738 if (signal_pending(current))
2739 return -EINTR;
2740 }
2741 }
2742
2743 mutex_lock(&adapter->mfe_lock);
2744 if (adapter->mfe_dvbdev != dvbdev) {
2745 mfedev = adapter->mfe_dvbdev;
2746 mfe = mfedev->priv;
2747 mfepriv = mfe->frontend_priv;
2748 if (mfedev->users != -1 ||
2749 mfepriv->thread) {
2750 mutex_unlock(&adapter->mfe_lock);
2751 return -EBUSY;
2752 }
2753 adapter->mfe_dvbdev = dvbdev;
2754 }
2755 }
2756 }
2757
2758 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2759 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2760 goto err0;
2761
2762 /* If we took control of the bus, we need to force
2763 reinitialization. This is because many ts_bus_ctrl()
2764 functions strobe the RESET pin on the demod, and if the
2765 frontend thread already exists then the dvb_init() routine
2766 won't get called (which is what usually does initial
2767 register configuration). */
2768 fepriv->reinitialise = 1;
2769 }
2770
2771 if ((ret = dvb_generic_open(inode, file)) < 0)
2772 goto err1;
2773
2774 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2775 /* normal tune mode when opened R/W */
2776 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2777 fepriv->tone = -1;
2778 fepriv->voltage = -1;
2779
2780 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2781 mutex_lock(&fe->dvb->mdev_lock);
2782 if (fe->dvb->mdev) {
2783 mutex_lock(&fe->dvb->mdev->graph_mutex);
2784 if (fe->dvb->mdev->enable_source)
2785 ret = fe->dvb->mdev->enable_source(
2786 dvbdev->entity,
2787 &fepriv->pipe);
2788 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2789 if (ret) {
2790 mutex_unlock(&fe->dvb->mdev_lock);
2791 dev_err(fe->dvb->device,
2792 "Tuner is busy. Error %d\n", ret);
2793 goto err2;
2794 }
2795 }
2796 mutex_unlock(&fe->dvb->mdev_lock);
2797 #endif
2798 ret = dvb_frontend_start(fe);
2799 if (ret)
2800 goto err3;
2801
2802 /* empty event queue */
2803 fepriv->events.eventr = fepriv->events.eventw = 0;
2804 }
2805
2806 dvb_frontend_get(fe);
2807
2808 if (adapter->mfe_shared)
2809 mutex_unlock(&adapter->mfe_lock);
2810 return ret;
2811
2812 err3:
2813 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2814 mutex_lock(&fe->dvb->mdev_lock);
2815 if (fe->dvb->mdev) {
2816 mutex_lock(&fe->dvb->mdev->graph_mutex);
2817 if (fe->dvb->mdev->disable_source)
2818 fe->dvb->mdev->disable_source(dvbdev->entity);
2819 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2820 }
2821 mutex_unlock(&fe->dvb->mdev_lock);
2822 err2:
2823 #endif
2824 dvb_generic_release(inode, file);
2825 err1:
2826 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2827 fe->ops.ts_bus_ctrl(fe, 0);
2828 err0:
2829 if (adapter->mfe_shared)
2830 mutex_unlock(&adapter->mfe_lock);
2831 return ret;
2832 }
2833
2834 static int dvb_frontend_release(struct inode *inode, struct file *file)
2835 {
2836 struct dvb_device *dvbdev = file->private_data;
2837 struct dvb_frontend *fe = dvbdev->priv;
2838 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2839 int ret;
2840
2841 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2842
2843 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2844 fepriv->release_jiffies = jiffies;
2845 mb();
2846 }
2847
2848 ret = dvb_generic_release(inode, file);
2849
2850 if (dvbdev->users == -1) {
2851 wake_up(&fepriv->wait_queue);
2852 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2853 mutex_lock(&fe->dvb->mdev_lock);
2854 if (fe->dvb->mdev) {
2855 mutex_lock(&fe->dvb->mdev->graph_mutex);
2856 if (fe->dvb->mdev->disable_source)
2857 fe->dvb->mdev->disable_source(dvbdev->entity);
2858 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2859 }
2860 mutex_unlock(&fe->dvb->mdev_lock);
2861 #endif
2862 if (fe->exit != DVB_FE_NO_EXIT)
2863 wake_up(&dvbdev->wait_queue);
2864 if (fe->ops.ts_bus_ctrl)
2865 fe->ops.ts_bus_ctrl(fe, 0);
2866 }
2867
2868 dvb_frontend_put(fe);
2869
2870 return ret;
2871 }
2872
2873 static const struct file_operations dvb_frontend_fops = {
2874 .owner = THIS_MODULE,
2875 .unlocked_ioctl = dvb_frontend_ioctl,
2876 #ifdef CONFIG_COMPAT
2877 .compat_ioctl = dvb_frontend_compat_ioctl,
2878 #endif
2879 .poll = dvb_frontend_poll,
2880 .open = dvb_frontend_open,
2881 .release = dvb_frontend_release,
2882 .llseek = noop_llseek,
2883 };
2884
2885 int dvb_frontend_suspend(struct dvb_frontend *fe)
2886 {
2887 int ret = 0;
2888
2889 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2890 fe->id);
2891
2892 if (fe->ops.tuner_ops.suspend)
2893 ret = fe->ops.tuner_ops.suspend(fe);
2894 else if (fe->ops.tuner_ops.sleep)
2895 ret = fe->ops.tuner_ops.sleep(fe);
2896
2897 if (fe->ops.sleep)
2898 ret = fe->ops.sleep(fe);
2899
2900 return ret;
2901 }
2902 EXPORT_SYMBOL(dvb_frontend_suspend);
2903
2904 int dvb_frontend_resume(struct dvb_frontend *fe)
2905 {
2906 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2907 int ret = 0;
2908
2909 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2910 fe->id);
2911
2912 fe->exit = DVB_FE_DEVICE_RESUME;
2913 if (fe->ops.init)
2914 ret = fe->ops.init(fe);
2915
2916 if (fe->ops.tuner_ops.resume)
2917 ret = fe->ops.tuner_ops.resume(fe);
2918 else if (fe->ops.tuner_ops.init)
2919 ret = fe->ops.tuner_ops.init(fe);
2920
2921 if (fe->ops.set_tone && fepriv->tone != -1)
2922 fe->ops.set_tone(fe, fepriv->tone);
2923 if (fe->ops.set_voltage && fepriv->voltage != -1)
2924 fe->ops.set_voltage(fe, fepriv->voltage);
2925
2926 fe->exit = DVB_FE_NO_EXIT;
2927 fepriv->state = FESTATE_RETUNE;
2928 dvb_frontend_wakeup(fe);
2929
2930 return ret;
2931 }
2932 EXPORT_SYMBOL(dvb_frontend_resume);
2933
2934 int dvb_register_frontend(struct dvb_adapter *dvb,
2935 struct dvb_frontend *fe)
2936 {
2937 struct dvb_frontend_private *fepriv;
2938 const struct dvb_device dvbdev_template = {
2939 .users = ~0,
2940 .writers = 1,
2941 .readers = (~0) - 1,
2942 .fops = &dvb_frontend_fops,
2943 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2944 .name = fe->ops.info.name,
2945 #endif
2946 };
2947
2948 dev_dbg(dvb->device, "%s:\n", __func__);
2949
2950 if (mutex_lock_interruptible(&frontend_mutex))
2951 return -ERESTARTSYS;
2952
2953 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2954 if (!fe->frontend_priv) {
2955 mutex_unlock(&frontend_mutex);
2956 return -ENOMEM;
2957 }
2958 fepriv = fe->frontend_priv;
2959
2960 kref_init(&fe->refcount);
2961
2962 /*
2963 * After initialization, there need to be two references: one
2964 * for dvb_unregister_frontend(), and another one for
2965 * dvb_frontend_detach().
2966 */
2967 dvb_frontend_get(fe);
2968
2969 sema_init(&fepriv->sem, 1);
2970 init_waitqueue_head(&fepriv->wait_queue);
2971 init_waitqueue_head(&fepriv->events.wait_queue);
2972 mutex_init(&fepriv->events.mtx);
2973 fe->dvb = dvb;
2974 fepriv->inversion = INVERSION_OFF;
2975
2976 dev_info(fe->dvb->device,
2977 "DVB: registering adapter %i frontend %i (%s)...\n",
2978 fe->dvb->num, fe->id, fe->ops.info.name);
2979
2980 dvb_register_device(fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2981 fe, DVB_DEVICE_FRONTEND, 0);
2982
2983 /*
2984 * Initialize the cache to the proper values according with the
2985 * first supported delivery system (ops->delsys[0])
2986 */
2987
2988 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2989 dvb_frontend_clear_cache(fe);
2990
2991 mutex_unlock(&frontend_mutex);
2992 return 0;
2993 }
2994 EXPORT_SYMBOL(dvb_register_frontend);
2995
2996 int dvb_unregister_frontend(struct dvb_frontend *fe)
2997 {
2998 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2999
3000 dev_dbg(fe->dvb->device, "%s:\n", __func__);
3001
3002 mutex_lock(&frontend_mutex);
3003 dvb_frontend_stop(fe);
3004 dvb_remove_device(fepriv->dvbdev);
3005
3006 /* fe is invalid now */
3007 mutex_unlock(&frontend_mutex);
3008 dvb_frontend_put(fe);
3009 return 0;
3010 }
3011 EXPORT_SYMBOL(dvb_unregister_frontend);
3012
3013 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
3014 void (*release)(struct dvb_frontend *fe))
3015 {
3016 if (release) {
3017 release(fe);
3018 #ifdef CONFIG_MEDIA_ATTACH
3019 dvb_detach(release);
3020 #endif
3021 }
3022 }
3023
3024 void dvb_frontend_detach(struct dvb_frontend *fe)
3025 {
3026 dvb_frontend_invoke_release(fe, fe->ops.release_sec);
3027 dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
3028 dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
3029 dvb_frontend_invoke_release(fe, fe->ops.detach);
3030 dvb_frontend_put(fe);
3031 }
3032 EXPORT_SYMBOL(dvb_frontend_detach);
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git