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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/nospec.h>
27#include <linux/list.h>
28#include <linux/freezer.h>
29#include <linux/jiffies.h>
30#include <linux/kthread.h>
31#include <linux/ktime.h>
32#include <linux/compat.h>
33#include <asm/processor.h>
34
35#include <media/dvb_frontend.h>
36#include <media/dvbdev.h>
37#include <linux/dvb/version.h>
38
39static int dvb_frontend_debug;
40static int dvb_shutdown_timeout;
41static int dvb_force_auto_inversion;
42static int dvb_override_tune_delay;
43static int dvb_powerdown_on_sleep = 1;
44static int dvb_mfe_wait_time = 5;
45
46module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
47MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
48module_param(dvb_shutdown_timeout, int, 0644);
49MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
50module_param(dvb_force_auto_inversion, int, 0644);
51MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
52module_param(dvb_override_tune_delay, int, 0644);
53MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
54module_param(dvb_powerdown_on_sleep, int, 0644);
55MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
56module_param(dvb_mfe_wait_time, int, 0644);
57MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
58
59#define dprintk(fmt, arg...) \
60 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
61
62#define FESTATE_IDLE 1
63#define FESTATE_RETUNE 2
64#define FESTATE_TUNING_FAST 4
65#define FESTATE_TUNING_SLOW 8
66#define FESTATE_TUNED 16
67#define FESTATE_ZIGZAG_FAST 32
68#define FESTATE_ZIGZAG_SLOW 64
69#define FESTATE_DISEQC 128
70#define FESTATE_ERROR 256
71#define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
72#define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
73#define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
74#define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
75
76/*
77 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
78 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
79 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
80 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
81 * FESTATE_TUNED. The frontend has successfully locked on.
82 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
83 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
84 * FESTATE_DISEQC. A DISEQC command has just been issued.
85 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
86 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
87 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
88 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
89 */
90
91static DEFINE_MUTEX(frontend_mutex);
92
93struct dvb_frontend_private {
94 /* thread/frontend values */
95 struct dvb_device *dvbdev;
96 struct dvb_frontend_parameters parameters_out;
97 struct dvb_fe_events events;
98 struct semaphore sem;
99 struct list_head list_head;
100 wait_queue_head_t wait_queue;
101 struct task_struct *thread;
102 unsigned long release_jiffies;
103 unsigned int wakeup;
104 enum fe_status status;
105 unsigned long tune_mode_flags;
106 unsigned int delay;
107 unsigned int reinitialise;
108 int tone;
109 int voltage;
110
111 /* swzigzag values */
112 unsigned int state;
113 unsigned int bending;
114 int lnb_drift;
115 unsigned int inversion;
116 unsigned int auto_step;
117 unsigned int auto_sub_step;
118 unsigned int started_auto_step;
119 unsigned int min_delay;
120 unsigned int max_drift;
121 unsigned int step_size;
122 int quality;
123 unsigned int check_wrapped;
124 enum dvbfe_search algo_status;
125
126#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
127 struct media_pipeline pipe;
128#endif
129};
130
131static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
132 void (*release)(struct dvb_frontend *fe));
133
134static void __dvb_frontend_free(struct dvb_frontend *fe)
135{
136 struct dvb_frontend_private *fepriv = fe->frontend_priv;
137
138 if (fepriv)
139 dvb_device_put(fepriv->dvbdev);
140
141 dvb_frontend_invoke_release(fe, fe->ops.release);
142
143 kfree(fepriv);
144}
145
146static void dvb_frontend_free(struct kref *ref)
147{
148 struct dvb_frontend *fe =
149 container_of(ref, struct dvb_frontend, refcount);
150
151 __dvb_frontend_free(fe);
152}
153
154static void dvb_frontend_put(struct dvb_frontend *fe)
155{
156 /* call detach before dropping the reference count */
157 if (fe->ops.detach)
158 fe->ops.detach(fe);
159 /*
160 * Check if the frontend was registered, as otherwise
161 * kref was not initialized yet.
162 */
163 if (fe->frontend_priv)
164 kref_put(&fe->refcount, dvb_frontend_free);
165 else
166 __dvb_frontend_free(fe);
167}
168
169static void dvb_frontend_get(struct dvb_frontend *fe)
170{
171 kref_get(&fe->refcount);
172}
173
174static void dvb_frontend_wakeup(struct dvb_frontend *fe);
175static int dtv_get_frontend(struct dvb_frontend *fe,
176 struct dtv_frontend_properties *c,
177 struct dvb_frontend_parameters *p_out);
178static int
179dtv_property_legacy_params_sync(struct dvb_frontend *fe,
180 const struct dtv_frontend_properties *c,
181 struct dvb_frontend_parameters *p);
182
183static bool has_get_frontend(struct dvb_frontend *fe)
184{
185 return fe->ops.get_frontend;
186}
187
188/*
189 * Due to DVBv3 API calls, a delivery system should be mapped into one of
190 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
191 * otherwise, a DVBv3 call will fail.
192 */
193enum dvbv3_emulation_type {
194 DVBV3_UNKNOWN,
195 DVBV3_QPSK,
196 DVBV3_QAM,
197 DVBV3_OFDM,
198 DVBV3_ATSC,
199};
200
201static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
202{
203 switch (delivery_system) {
204 case SYS_DVBC_ANNEX_A:
205 case SYS_DVBC_ANNEX_C:
206 return DVBV3_QAM;
207 case SYS_DVBS:
208 case SYS_DVBS2:
209 case SYS_TURBO:
210 case SYS_ISDBS:
211 case SYS_DSS:
212 return DVBV3_QPSK;
213 case SYS_DVBT:
214 case SYS_DVBT2:
215 case SYS_ISDBT:
216 case SYS_DTMB:
217 return DVBV3_OFDM;
218 case SYS_ATSC:
219 case SYS_ATSCMH:
220 case SYS_DVBC_ANNEX_B:
221 return DVBV3_ATSC;
222 case SYS_UNDEFINED:
223 case SYS_ISDBC:
224 case SYS_DVBH:
225 case SYS_DAB:
226 default:
227 /*
228 * Doesn't know how to emulate those types and/or
229 * there's no frontend driver from this type yet
230 * with some emulation code, so, we're not sure yet how
231 * to handle them, or they're not compatible with a DVBv3 call.
232 */
233 return DVBV3_UNKNOWN;
234 }
235}
236
237static void dvb_frontend_add_event(struct dvb_frontend *fe,
238 enum fe_status status)
239{
240 struct dvb_frontend_private *fepriv = fe->frontend_priv;
241 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
242 struct dvb_fe_events *events = &fepriv->events;
243 struct dvb_frontend_event *e;
244 int wp;
245
246 dev_dbg(fe->dvb->device, "%s:\n", __func__);
247
248 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
249 dtv_get_frontend(fe, c, &fepriv->parameters_out);
250
251 mutex_lock(&events->mtx);
252
253 wp = (events->eventw + 1) % MAX_EVENT;
254 if (wp == events->eventr) {
255 events->overflow = 1;
256 events->eventr = (events->eventr + 1) % MAX_EVENT;
257 }
258
259 e = &events->events[events->eventw];
260 e->status = status;
261 e->parameters = fepriv->parameters_out;
262
263 events->eventw = wp;
264
265 mutex_unlock(&events->mtx);
266
267 wake_up_interruptible(&events->wait_queue);
268}
269
270static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv,
271 struct dvb_fe_events *events)
272{
273 int ret;
274
275 up(&fepriv->sem);
276 ret = events->eventw != events->eventr;
277 down(&fepriv->sem);
278
279 return ret;
280}
281
282static int dvb_frontend_get_event(struct dvb_frontend *fe,
283 struct dvb_frontend_event *event, int flags)
284{
285 struct dvb_frontend_private *fepriv = fe->frontend_priv;
286 struct dvb_fe_events *events = &fepriv->events;
287
288 dev_dbg(fe->dvb->device, "%s:\n", __func__);
289
290 if (events->overflow) {
291 events->overflow = 0;
292 return -EOVERFLOW;
293 }
294
295 if (events->eventw == events->eventr) {
296 int ret;
297
298 if (flags & O_NONBLOCK)
299 return -EWOULDBLOCK;
300
301 ret = wait_event_interruptible(events->wait_queue,
302 dvb_frontend_test_event(fepriv, events));
303
304 if (ret < 0)
305 return ret;
306 }
307
308 mutex_lock(&events->mtx);
309 *event = events->events[events->eventr];
310 events->eventr = (events->eventr + 1) % MAX_EVENT;
311 mutex_unlock(&events->mtx);
312
313 return 0;
314}
315
316static void dvb_frontend_clear_events(struct dvb_frontend *fe)
317{
318 struct dvb_frontend_private *fepriv = fe->frontend_priv;
319 struct dvb_fe_events *events = &fepriv->events;
320
321 mutex_lock(&events->mtx);
322 events->eventr = events->eventw;
323 mutex_unlock(&events->mtx);
324}
325
326static void dvb_frontend_init(struct dvb_frontend *fe)
327{
328 dev_dbg(fe->dvb->device,
329 "%s: initialising adapter %i frontend %i (%s)...\n",
330 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
331
332 if (fe->ops.init)
333 fe->ops.init(fe);
334 if (fe->ops.tuner_ops.init) {
335 if (fe->ops.i2c_gate_ctrl)
336 fe->ops.i2c_gate_ctrl(fe, 1);
337 fe->ops.tuner_ops.init(fe);
338 if (fe->ops.i2c_gate_ctrl)
339 fe->ops.i2c_gate_ctrl(fe, 0);
340 }
341}
342
343void dvb_frontend_reinitialise(struct dvb_frontend *fe)
344{
345 struct dvb_frontend_private *fepriv = fe->frontend_priv;
346
347 fepriv->reinitialise = 1;
348 dvb_frontend_wakeup(fe);
349}
350EXPORT_SYMBOL(dvb_frontend_reinitialise);
351
352static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
353{
354 int q2;
355 struct dvb_frontend *fe = fepriv->dvbdev->priv;
356
357 dev_dbg(fe->dvb->device, "%s:\n", __func__);
358
359 if (locked)
360 (fepriv->quality) = (fepriv->quality * 220 + 36 * 256) / 256;
361 else
362 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
363
364 q2 = fepriv->quality - 128;
365 q2 *= q2;
366
367 fepriv->delay = fepriv->min_delay + q2 * HZ / (128 * 128);
368}
369
370/**
371 * dvb_frontend_swzigzag_autotune - Performs automatic twiddling of frontend
372 * parameters.
373 *
374 * @fe: The frontend concerned.
375 * @check_wrapped: Checks if an iteration has completed.
376 * DO NOT SET ON THE FIRST ATTEMPT.
377 *
378 * return: Number of complete iterations that have been performed.
379 */
380static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
381{
382 int autoinversion;
383 int ready = 0;
384 int fe_set_err = 0;
385 struct dvb_frontend_private *fepriv = fe->frontend_priv;
386 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
387 int original_inversion = c->inversion;
388 u32 original_frequency = c->frequency;
389
390 /* are we using autoinversion? */
391 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
392 (c->inversion == INVERSION_AUTO));
393
394 /* setup parameters correctly */
395 while (!ready) {
396 /* calculate the lnb_drift */
397 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
398
399 /* wrap the auto_step if we've exceeded the maximum drift */
400 if (fepriv->lnb_drift > fepriv->max_drift) {
401 fepriv->auto_step = 0;
402 fepriv->auto_sub_step = 0;
403 fepriv->lnb_drift = 0;
404 }
405
406 /* perform inversion and +/- zigzag */
407 switch (fepriv->auto_sub_step) {
408 case 0:
409 /* try with the current inversion and current drift setting */
410 ready = 1;
411 break;
412
413 case 1:
414 if (!autoinversion) break;
415
416 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
417 ready = 1;
418 break;
419
420 case 2:
421 if (fepriv->lnb_drift == 0) break;
422
423 fepriv->lnb_drift = -fepriv->lnb_drift;
424 ready = 1;
425 break;
426
427 case 3:
428 if (fepriv->lnb_drift == 0) break;
429 if (!autoinversion) break;
430
431 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
432 fepriv->lnb_drift = -fepriv->lnb_drift;
433 ready = 1;
434 break;
435
436 default:
437 fepriv->auto_step++;
438 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
439 break;
440 }
441
442 if (!ready) fepriv->auto_sub_step++;
443 }
444
445 /* if this attempt would hit where we started, indicate a complete
446 * iteration has occurred */
447 if ((fepriv->auto_step == fepriv->started_auto_step) &&
448 (fepriv->auto_sub_step == 0) && check_wrapped) {
449 return 1;
450 }
451
452 dev_dbg(fe->dvb->device,
453 "%s: drift:%i inversion:%i auto_step:%i auto_sub_step:%i started_auto_step:%i\n",
454 __func__, fepriv->lnb_drift, fepriv->inversion,
455 fepriv->auto_step, fepriv->auto_sub_step,
456 fepriv->started_auto_step);
457
458 /* set the frontend itself */
459 c->frequency += fepriv->lnb_drift;
460 if (autoinversion)
461 c->inversion = fepriv->inversion;
462 tmp = *c;
463 if (fe->ops.set_frontend)
464 fe_set_err = fe->ops.set_frontend(fe);
465 *c = tmp;
466 if (fe_set_err < 0) {
467 fepriv->state = FESTATE_ERROR;
468 return fe_set_err;
469 }
470
471 c->frequency = original_frequency;
472 c->inversion = original_inversion;
473
474 fepriv->auto_sub_step++;
475 return 0;
476}
477
478static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
479{
480 enum fe_status s = FE_NONE;
481 int retval = 0;
482 struct dvb_frontend_private *fepriv = fe->frontend_priv;
483 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
484
485 if (fepriv->max_drift)
486 dev_warn_once(fe->dvb->device,
487 "Frontend requested software zigzag, but didn't set the frequency step size\n");
488
489 /* if we've got no parameters, just keep idling */
490 if (fepriv->state & FESTATE_IDLE) {
491 fepriv->delay = 3 * HZ;
492 fepriv->quality = 0;
493 return;
494 }
495
496 /* in SCAN mode, we just set the frontend when asked and leave it alone */
497 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
498 if (fepriv->state & FESTATE_RETUNE) {
499 tmp = *c;
500 if (fe->ops.set_frontend)
501 retval = fe->ops.set_frontend(fe);
502 *c = tmp;
503 if (retval < 0)
504 fepriv->state = FESTATE_ERROR;
505 else
506 fepriv->state = FESTATE_TUNED;
507 }
508 fepriv->delay = 3 * HZ;
509 fepriv->quality = 0;
510 return;
511 }
512
513 /* get the frontend status */
514 if (fepriv->state & FESTATE_RETUNE) {
515 s = 0;
516 } else {
517 if (fe->ops.read_status)
518 fe->ops.read_status(fe, &s);
519 if (s != fepriv->status) {
520 dvb_frontend_add_event(fe, s);
521 fepriv->status = s;
522 }
523 }
524
525 /* if we're not tuned, and we have a lock, move to the TUNED state */
526 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
527 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
528 fepriv->state = FESTATE_TUNED;
529
530 /* if we're tuned, then we have determined the correct inversion */
531 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
532 (c->inversion == INVERSION_AUTO)) {
533 c->inversion = fepriv->inversion;
534 }
535 return;
536 }
537
538 /* if we are tuned already, check we're still locked */
539 if (fepriv->state & FESTATE_TUNED) {
540 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
541
542 /* we're tuned, and the lock is still good... */
543 if (s & FE_HAS_LOCK) {
544 return;
545 } else { /* if we _WERE_ tuned, but now don't have a lock */
546 fepriv->state = FESTATE_ZIGZAG_FAST;
547 fepriv->started_auto_step = fepriv->auto_step;
548 fepriv->check_wrapped = 0;
549 }
550 }
551
552 /* don't actually do anything if we're in the LOSTLOCK state,
553 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
554 if ((fepriv->state & FESTATE_LOSTLOCK) &&
555 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
556 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
557 return;
558 }
559
560 /* don't do anything if we're in the DISEQC state, since this
561 * might be someone with a motorized dish controlled by DISEQC.
562 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
563 if (fepriv->state & FESTATE_DISEQC) {
564 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
565 return;
566 }
567
568 /* if we're in the RETUNE state, set everything up for a brand
569 * new scan, keeping the current inversion setting, as the next
570 * tune is _very_ likely to require the same */
571 if (fepriv->state & FESTATE_RETUNE) {
572 fepriv->lnb_drift = 0;
573 fepriv->auto_step = 0;
574 fepriv->auto_sub_step = 0;
575 fepriv->started_auto_step = 0;
576 fepriv->check_wrapped = 0;
577 }
578
579 /* fast zigzag. */
580 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
581 fepriv->delay = fepriv->min_delay;
582
583 /* perform a tune */
584 retval = dvb_frontend_swzigzag_autotune(fe,
585 fepriv->check_wrapped);
586 if (retval < 0) {
587 return;
588 } else if (retval) {
589 /* OK, if we've run out of trials at the fast speed.
590 * Drop back to slow for the _next_ attempt */
591 fepriv->state = FESTATE_SEARCHING_SLOW;
592 fepriv->started_auto_step = fepriv->auto_step;
593 return;
594 }
595 fepriv->check_wrapped = 1;
596
597 /* if we've just re-tuned, enter the ZIGZAG_FAST state.
598 * This ensures we cannot return from an
599 * FE_SET_FRONTEND ioctl before the first frontend tune
600 * occurs */
601 if (fepriv->state & FESTATE_RETUNE) {
602 fepriv->state = FESTATE_TUNING_FAST;
603 }
604 }
605
606 /* slow zigzag */
607 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
608 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
609
610 /* Note: don't bother checking for wrapping; we stay in this
611 * state until we get a lock */
612 dvb_frontend_swzigzag_autotune(fe, 0);
613 }
614}
615
616static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
617{
618 struct dvb_frontend_private *fepriv = fe->frontend_priv;
619
620 if (fe->exit != DVB_FE_NO_EXIT)
621 return 1;
622
623 if (fepriv->dvbdev->writers == 1)
624 if (time_after_eq(jiffies, fepriv->release_jiffies +
625 dvb_shutdown_timeout * HZ))
626 return 1;
627
628 return 0;
629}
630
631static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
632{
633 struct dvb_frontend_private *fepriv = fe->frontend_priv;
634
635 if (fepriv->wakeup) {
636 fepriv->wakeup = 0;
637 return 1;
638 }
639 return dvb_frontend_is_exiting(fe);
640}
641
642static void dvb_frontend_wakeup(struct dvb_frontend *fe)
643{
644 struct dvb_frontend_private *fepriv = fe->frontend_priv;
645
646 fepriv->wakeup = 1;
647 wake_up_interruptible(&fepriv->wait_queue);
648}
649
650static int dvb_frontend_thread(void *data)
651{
652 struct dvb_frontend *fe = data;
653 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
654 struct dvb_frontend_private *fepriv = fe->frontend_priv;
655 enum fe_status s = FE_NONE;
656 enum dvbfe_algo algo;
657 bool re_tune = false;
658 bool semheld = false;
659
660 dev_dbg(fe->dvb->device, "%s:\n", __func__);
661
662 fepriv->check_wrapped = 0;
663 fepriv->quality = 0;
664 fepriv->delay = 3 * HZ;
665 fepriv->status = 0;
666 fepriv->wakeup = 0;
667 fepriv->reinitialise = 0;
668
669 dvb_frontend_init(fe);
670
671 set_freezable();
672 while (1) {
673 up(&fepriv->sem); /* is locked when we enter the thread... */
674restart:
675 wait_event_interruptible_timeout(fepriv->wait_queue,
676 dvb_frontend_should_wakeup(fe) ||
677 kthread_should_stop() ||
678 freezing(current),
679 fepriv->delay);
680
681 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
682 /* got signal or quitting */
683 if (!down_interruptible(&fepriv->sem))
684 semheld = true;
685 fe->exit = DVB_FE_NORMAL_EXIT;
686 break;
687 }
688
689 if (try_to_freeze())
690 goto restart;
691
692 if (down_interruptible(&fepriv->sem))
693 break;
694
695 if (fepriv->reinitialise) {
696 dvb_frontend_init(fe);
697 if (fe->ops.set_tone && fepriv->tone != -1)
698 fe->ops.set_tone(fe, fepriv->tone);
699 if (fe->ops.set_voltage && fepriv->voltage != -1)
700 fe->ops.set_voltage(fe, fepriv->voltage);
701 fepriv->reinitialise = 0;
702 }
703
704 /* do an iteration of the tuning loop */
705 if (fe->ops.get_frontend_algo) {
706 algo = fe->ops.get_frontend_algo(fe);
707 switch (algo) {
708 case DVBFE_ALGO_HW:
709 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
710
711 if (fepriv->state & FESTATE_RETUNE) {
712 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
713 re_tune = true;
714 fepriv->state = FESTATE_TUNED;
715 } else {
716 re_tune = false;
717 }
718
719 if (fe->ops.tune)
720 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
721
722 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
723 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
724 dvb_frontend_add_event(fe, s);
725 fepriv->status = s;
726 }
727 break;
728 case DVBFE_ALGO_SW:
729 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
730 dvb_frontend_swzigzag(fe);
731 break;
732 case DVBFE_ALGO_CUSTOM:
733 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
734 if (fepriv->state & FESTATE_RETUNE) {
735 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
736 fepriv->state = FESTATE_TUNED;
737 }
738 /* Case where we are going to search for a carrier
739 * User asked us to retune again for some reason, possibly
740 * requesting a search with a new set of parameters
741 */
742 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
743 if (fe->ops.search) {
744 fepriv->algo_status = fe->ops.search(fe);
745 /* We did do a search as was requested, the flags are
746 * now unset as well and has the flags wrt to search.
747 */
748 } else {
749 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
750 }
751 }
752 /* Track the carrier if the search was successful */
753 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
754 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
755 fepriv->delay = HZ / 2;
756 }
757 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
758 fe->ops.read_status(fe, &s);
759 if (s != fepriv->status) {
760 dvb_frontend_add_event(fe, s); /* update event list */
761 fepriv->status = s;
762 if (!(s & FE_HAS_LOCK)) {
763 fepriv->delay = HZ / 10;
764 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
765 } else {
766 fepriv->delay = 60 * HZ;
767 }
768 }
769 break;
770 default:
771 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
772 break;
773 }
774 } else {
775 dvb_frontend_swzigzag(fe);
776 }
777 }
778
779 if (dvb_powerdown_on_sleep) {
780 if (fe->ops.set_voltage)
781 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
782 if (fe->ops.tuner_ops.sleep) {
783 if (fe->ops.i2c_gate_ctrl)
784 fe->ops.i2c_gate_ctrl(fe, 1);
785 fe->ops.tuner_ops.sleep(fe);
786 if (fe->ops.i2c_gate_ctrl)
787 fe->ops.i2c_gate_ctrl(fe, 0);
788 }
789 if (fe->ops.sleep)
790 fe->ops.sleep(fe);
791 }
792
793 fepriv->thread = NULL;
794 if (kthread_should_stop())
795 fe->exit = DVB_FE_DEVICE_REMOVED;
796 else
797 fe->exit = DVB_FE_NO_EXIT;
798 mb();
799
800 if (semheld)
801 up(&fepriv->sem);
802 dvb_frontend_wakeup(fe);
803 return 0;
804}
805
806static void dvb_frontend_stop(struct dvb_frontend *fe)
807{
808 struct dvb_frontend_private *fepriv = fe->frontend_priv;
809
810 dev_dbg(fe->dvb->device, "%s:\n", __func__);
811
812 if (fe->exit != DVB_FE_DEVICE_REMOVED)
813 fe->exit = DVB_FE_NORMAL_EXIT;
814 mb();
815
816 if (!fepriv->thread)
817 return;
818
819 kthread_stop(fepriv->thread);
820
821 sema_init(&fepriv->sem, 1);
822 fepriv->state = FESTATE_IDLE;
823
824 /* paranoia check in case a signal arrived */
825 if (fepriv->thread)
826 dev_warn(fe->dvb->device,
827 "dvb_frontend_stop: warning: thread %p won't exit\n",
828 fepriv->thread);
829}
830
831/*
832 * Sleep for the amount of time given by add_usec parameter
833 *
834 * This needs to be as precise as possible, as it affects the detection of
835 * the dish tone command at the satellite subsystem. The precision is improved
836 * by using a scheduled msleep followed by udelay for the remainder.
837 */
838void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
839{
840 s32 delta;
841
842 *waketime = ktime_add_us(*waketime, add_usec);
843 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
844 if (delta > 2500) {
845 msleep((delta - 1500) / 1000);
846 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
847 }
848 if (delta > 0)
849 udelay(delta);
850}
851EXPORT_SYMBOL(dvb_frontend_sleep_until);
852
853static int dvb_frontend_start(struct dvb_frontend *fe)
854{
855 int ret;
856 struct dvb_frontend_private *fepriv = fe->frontend_priv;
857 struct task_struct *fe_thread;
858
859 dev_dbg(fe->dvb->device, "%s:\n", __func__);
860
861 if (fepriv->thread) {
862 if (fe->exit == DVB_FE_NO_EXIT)
863 return 0;
864 else
865 dvb_frontend_stop(fe);
866 }
867
868 if (signal_pending(current))
869 return -EINTR;
870 if (down_interruptible(&fepriv->sem))
871 return -EINTR;
872
873 fepriv->state = FESTATE_IDLE;
874 fe->exit = DVB_FE_NO_EXIT;
875 fepriv->thread = NULL;
876 mb();
877
878 fe_thread = kthread_run(dvb_frontend_thread, fe,
879 "kdvb-ad-%i-fe-%i", fe->dvb->num, fe->id);
880 if (IS_ERR(fe_thread)) {
881 ret = PTR_ERR(fe_thread);
882 dev_warn(fe->dvb->device,
883 "dvb_frontend_start: failed to start kthread (%d)\n",
884 ret);
885 up(&fepriv->sem);
886 return ret;
887 }
888 fepriv->thread = fe_thread;
889 return 0;
890}
891
892static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
893 u32 *freq_min, u32 *freq_max,
894 u32 *tolerance)
895{
896 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
897 u32 tuner_min = fe->ops.tuner_ops.info.frequency_min_hz;
898 u32 tuner_max = fe->ops.tuner_ops.info.frequency_max_hz;
899 u32 frontend_min = fe->ops.info.frequency_min_hz;
900 u32 frontend_max = fe->ops.info.frequency_max_hz;
901
902 *freq_min = max(frontend_min, tuner_min);
903
904 if (frontend_max == 0)
905 *freq_max = tuner_max;
906 else if (tuner_max == 0)
907 *freq_max = frontend_max;
908 else
909 *freq_max = min(frontend_max, tuner_max);
910
911 if (*freq_min == 0 || *freq_max == 0)
912 dev_warn(fe->dvb->device,
913 "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
914 fe->dvb->num, fe->id);
915
916 dev_dbg(fe->dvb->device, "frequency interval: tuner: %u...%u, frontend: %u...%u",
917 tuner_min, tuner_max, frontend_min, frontend_max);
918
919 /* If the standard is for satellite, convert frequencies to kHz */
920 switch (c->delivery_system) {
921 case SYS_DSS:
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
939static 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_DSS:
948 case SYS_DVBS:
949 case SYS_DVBS2:
950 case SYS_TURBO:
951 case SYS_ISDBS:
952 step /= kHz;
953 break;
954 default:
955 break;
956 }
957
958 return step;
959}
960
961static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
962{
963 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
964 u32 freq_min;
965 u32 freq_max;
966
967 /* range check: frequency */
968 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max, NULL);
969 if ((freq_min && c->frequency < freq_min) ||
970 (freq_max && c->frequency > freq_max)) {
971 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
972 fe->dvb->num, fe->id, c->frequency,
973 freq_min, freq_max);
974 return -EINVAL;
975 }
976
977 /* range check: symbol rate */
978 switch (c->delivery_system) {
979 case SYS_DSS:
980 case SYS_DVBS:
981 case SYS_DVBS2:
982 case SYS_TURBO:
983 case SYS_DVBC_ANNEX_A:
984 case SYS_DVBC_ANNEX_C:
985 if ((fe->ops.info.symbol_rate_min &&
986 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
987 (fe->ops.info.symbol_rate_max &&
988 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
989 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
990 fe->dvb->num, fe->id, c->symbol_rate,
991 fe->ops.info.symbol_rate_min,
992 fe->ops.info.symbol_rate_max);
993 return -EINVAL;
994 }
995 break;
996 default:
997 break;
998 }
999
1000 return 0;
1001}
1002
1003static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
1004{
1005 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1006 int i;
1007 u32 delsys;
1008
1009 delsys = c->delivery_system;
1010 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
1011 c->delivery_system = delsys;
1012
1013 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1014 __func__, c->delivery_system);
1015
1016 c->transmission_mode = TRANSMISSION_MODE_AUTO;
1017 c->bandwidth_hz = 0; /* AUTO */
1018 c->guard_interval = GUARD_INTERVAL_AUTO;
1019 c->hierarchy = HIERARCHY_AUTO;
1020 c->symbol_rate = 0;
1021 c->code_rate_HP = FEC_AUTO;
1022 c->code_rate_LP = FEC_AUTO;
1023 c->fec_inner = FEC_AUTO;
1024 c->rolloff = ROLLOFF_AUTO;
1025 c->voltage = SEC_VOLTAGE_OFF;
1026 c->sectone = SEC_TONE_OFF;
1027 c->pilot = PILOT_AUTO;
1028
1029 c->isdbt_partial_reception = 0;
1030 c->isdbt_sb_mode = 0;
1031 c->isdbt_sb_subchannel = 0;
1032 c->isdbt_sb_segment_idx = 0;
1033 c->isdbt_sb_segment_count = 0;
1034 c->isdbt_layer_enabled = 7; /* All layers (A,B,C) */
1035 for (i = 0; i < 3; i++) {
1036 c->layer[i].fec = FEC_AUTO;
1037 c->layer[i].modulation = QAM_AUTO;
1038 c->layer[i].interleaving = 0;
1039 c->layer[i].segment_count = 0;
1040 }
1041
1042 c->stream_id = NO_STREAM_ID_FILTER;
1043 c->scrambling_sequence_index = 0;/* default sequence */
1044
1045 switch (c->delivery_system) {
1046 case SYS_DSS:
1047 c->modulation = QPSK;
1048 c->rolloff = ROLLOFF_20;
1049 break;
1050 case SYS_DVBS:
1051 case SYS_DVBS2:
1052 case SYS_TURBO:
1053 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1054 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1055 break;
1056 case SYS_ATSC:
1057 c->modulation = VSB_8;
1058 break;
1059 case SYS_ISDBS:
1060 c->symbol_rate = 28860000;
1061 c->rolloff = ROLLOFF_35;
1062 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1063 break;
1064 default:
1065 c->modulation = QAM_AUTO;
1066 break;
1067 }
1068
1069 c->lna = LNA_AUTO;
1070
1071 return 0;
1072}
1073
1074#define _DTV_CMD(n) \
1075 [n] = #n
1076
1077static char *dtv_cmds[DTV_MAX_COMMAND + 1] = {
1078 _DTV_CMD(DTV_TUNE),
1079 _DTV_CMD(DTV_CLEAR),
1080
1081 /* Set */
1082 _DTV_CMD(DTV_FREQUENCY),
1083 _DTV_CMD(DTV_BANDWIDTH_HZ),
1084 _DTV_CMD(DTV_MODULATION),
1085 _DTV_CMD(DTV_INVERSION),
1086 _DTV_CMD(DTV_DISEQC_MASTER),
1087 _DTV_CMD(DTV_SYMBOL_RATE),
1088 _DTV_CMD(DTV_INNER_FEC),
1089 _DTV_CMD(DTV_VOLTAGE),
1090 _DTV_CMD(DTV_TONE),
1091 _DTV_CMD(DTV_PILOT),
1092 _DTV_CMD(DTV_ROLLOFF),
1093 _DTV_CMD(DTV_DELIVERY_SYSTEM),
1094 _DTV_CMD(DTV_HIERARCHY),
1095 _DTV_CMD(DTV_CODE_RATE_HP),
1096 _DTV_CMD(DTV_CODE_RATE_LP),
1097 _DTV_CMD(DTV_GUARD_INTERVAL),
1098 _DTV_CMD(DTV_TRANSMISSION_MODE),
1099 _DTV_CMD(DTV_INTERLEAVING),
1100
1101 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION),
1102 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING),
1103 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID),
1104 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX),
1105 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT),
1106 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED),
1107 _DTV_CMD(DTV_ISDBT_LAYERA_FEC),
1108 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION),
1109 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT),
1110 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING),
1111 _DTV_CMD(DTV_ISDBT_LAYERB_FEC),
1112 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION),
1113 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT),
1114 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING),
1115 _DTV_CMD(DTV_ISDBT_LAYERC_FEC),
1116 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION),
1117 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT),
1118 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING),
1119
1120 _DTV_CMD(DTV_STREAM_ID),
1121 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY),
1122 _DTV_CMD(DTV_SCRAMBLING_SEQUENCE_INDEX),
1123 _DTV_CMD(DTV_LNA),
1124
1125 /* Get */
1126 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY),
1127 _DTV_CMD(DTV_API_VERSION),
1128
1129 _DTV_CMD(DTV_ENUM_DELSYS),
1130
1131 _DTV_CMD(DTV_ATSCMH_PARADE_ID),
1132 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE),
1133
1134 _DTV_CMD(DTV_ATSCMH_FIC_VER),
1135 _DTV_CMD(DTV_ATSCMH_NOG),
1136 _DTV_CMD(DTV_ATSCMH_TNOG),
1137 _DTV_CMD(DTV_ATSCMH_SGN),
1138 _DTV_CMD(DTV_ATSCMH_PRC),
1139 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE),
1140 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI),
1141 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC),
1142 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE),
1143 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A),
1144 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B),
1145 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C),
1146 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D),
1147
1148 /* Statistics API */
1149 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH),
1150 _DTV_CMD(DTV_STAT_CNR),
1151 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT),
1152 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT),
1153 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT),
1154 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT),
1155 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT),
1156 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT),
1157};
1158
1159static char *dtv_cmd_name(u32 cmd)
1160{
1161 cmd = array_index_nospec(cmd, DTV_MAX_COMMAND);
1162 return dtv_cmds[cmd];
1163}
1164
1165/* Synchronise the legacy tuning parameters into the cache, so that demodulator
1166 * drivers can use a single set_frontend tuning function, regardless of whether
1167 * it's being used for the legacy or new API, reducing code and complexity.
1168 */
1169static int dtv_property_cache_sync(struct dvb_frontend *fe,
1170 struct dtv_frontend_properties *c,
1171 const struct dvb_frontend_parameters *p)
1172{
1173 c->frequency = p->frequency;
1174 c->inversion = p->inversion;
1175
1176 switch (dvbv3_type(c->delivery_system)) {
1177 case DVBV3_QPSK:
1178 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1179 c->symbol_rate = p->u.qpsk.symbol_rate;
1180 c->fec_inner = p->u.qpsk.fec_inner;
1181 break;
1182 case DVBV3_QAM:
1183 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1184 c->symbol_rate = p->u.qam.symbol_rate;
1185 c->fec_inner = p->u.qam.fec_inner;
1186 c->modulation = p->u.qam.modulation;
1187 break;
1188 case DVBV3_OFDM:
1189 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1190
1191 switch (p->u.ofdm.bandwidth) {
1192 case BANDWIDTH_10_MHZ:
1193 c->bandwidth_hz = 10000000;
1194 break;
1195 case BANDWIDTH_8_MHZ:
1196 c->bandwidth_hz = 8000000;
1197 break;
1198 case BANDWIDTH_7_MHZ:
1199 c->bandwidth_hz = 7000000;
1200 break;
1201 case BANDWIDTH_6_MHZ:
1202 c->bandwidth_hz = 6000000;
1203 break;
1204 case BANDWIDTH_5_MHZ:
1205 c->bandwidth_hz = 5000000;
1206 break;
1207 case BANDWIDTH_1_712_MHZ:
1208 c->bandwidth_hz = 1712000;
1209 break;
1210 case BANDWIDTH_AUTO:
1211 c->bandwidth_hz = 0;
1212 }
1213
1214 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1215 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1216 c->modulation = p->u.ofdm.constellation;
1217 c->transmission_mode = p->u.ofdm.transmission_mode;
1218 c->guard_interval = p->u.ofdm.guard_interval;
1219 c->hierarchy = p->u.ofdm.hierarchy_information;
1220 break;
1221 case DVBV3_ATSC:
1222 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1223 c->modulation = p->u.vsb.modulation;
1224 if (c->delivery_system == SYS_ATSCMH)
1225 break;
1226 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1227 c->delivery_system = SYS_ATSC;
1228 else
1229 c->delivery_system = SYS_DVBC_ANNEX_B;
1230 break;
1231 case DVBV3_UNKNOWN:
1232 dev_err(fe->dvb->device,
1233 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1234 __func__, c->delivery_system);
1235 return -EINVAL;
1236 }
1237
1238 return 0;
1239}
1240
1241/* Ensure the cached values are set correctly in the frontend
1242 * legacy tuning structures, for the advanced tuning API.
1243 */
1244static int
1245dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1246 const struct dtv_frontend_properties *c,
1247 struct dvb_frontend_parameters *p)
1248{
1249 p->frequency = c->frequency;
1250 p->inversion = c->inversion;
1251
1252 switch (dvbv3_type(c->delivery_system)) {
1253 case DVBV3_UNKNOWN:
1254 dev_err(fe->dvb->device,
1255 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1256 __func__, c->delivery_system);
1257 return -EINVAL;
1258 case DVBV3_QPSK:
1259 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1260 p->u.qpsk.symbol_rate = c->symbol_rate;
1261 p->u.qpsk.fec_inner = c->fec_inner;
1262 break;
1263 case DVBV3_QAM:
1264 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1265 p->u.qam.symbol_rate = c->symbol_rate;
1266 p->u.qam.fec_inner = c->fec_inner;
1267 p->u.qam.modulation = c->modulation;
1268 break;
1269 case DVBV3_OFDM:
1270 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1271 switch (c->bandwidth_hz) {
1272 case 10000000:
1273 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1274 break;
1275 case 8000000:
1276 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1277 break;
1278 case 7000000:
1279 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1280 break;
1281 case 6000000:
1282 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1283 break;
1284 case 5000000:
1285 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1286 break;
1287 case 1712000:
1288 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1289 break;
1290 case 0:
1291 default:
1292 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1293 }
1294 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1295 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1296 p->u.ofdm.constellation = c->modulation;
1297 p->u.ofdm.transmission_mode = c->transmission_mode;
1298 p->u.ofdm.guard_interval = c->guard_interval;
1299 p->u.ofdm.hierarchy_information = c->hierarchy;
1300 break;
1301 case DVBV3_ATSC:
1302 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1303 p->u.vsb.modulation = c->modulation;
1304 break;
1305 }
1306 return 0;
1307}
1308
1309/**
1310 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1311 * @fe: struct dvb_frontend pointer
1312 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1313 * @p_out: struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1314 *
1315 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1316 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1317 * If p_out is not null, it will update the DVBv3 params pointed by it.
1318 */
1319static int dtv_get_frontend(struct dvb_frontend *fe,
1320 struct dtv_frontend_properties *c,
1321 struct dvb_frontend_parameters *p_out)
1322{
1323 int r;
1324
1325 if (fe->ops.get_frontend) {
1326 r = fe->ops.get_frontend(fe, c);
1327 if (unlikely(r < 0))
1328 return r;
1329 if (p_out)
1330 dtv_property_legacy_params_sync(fe, c, p_out);
1331 return 0;
1332 }
1333
1334 /* As everything is in cache, get_frontend fops are always supported */
1335 return 0;
1336}
1337
1338static int dvb_frontend_handle_ioctl(struct file *file,
1339 unsigned int cmd, void *parg);
1340
1341static int dtv_property_process_get(struct dvb_frontend *fe,
1342 const struct dtv_frontend_properties *c,
1343 struct dtv_property *tvp,
1344 struct file *file)
1345{
1346 int ncaps;
1347 unsigned int len = 1;
1348
1349 switch (tvp->cmd) {
1350 case DTV_ENUM_DELSYS:
1351 ncaps = 0;
1352 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1353 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1354 ncaps++;
1355 }
1356 tvp->u.buffer.len = ncaps;
1357 len = ncaps;
1358 break;
1359 case DTV_FREQUENCY:
1360 tvp->u.data = c->frequency;
1361 break;
1362 case DTV_MODULATION:
1363 tvp->u.data = c->modulation;
1364 break;
1365 case DTV_BANDWIDTH_HZ:
1366 tvp->u.data = c->bandwidth_hz;
1367 break;
1368 case DTV_INVERSION:
1369 tvp->u.data = c->inversion;
1370 break;
1371 case DTV_SYMBOL_RATE:
1372 tvp->u.data = c->symbol_rate;
1373 break;
1374 case DTV_INNER_FEC:
1375 tvp->u.data = c->fec_inner;
1376 break;
1377 case DTV_PILOT:
1378 tvp->u.data = c->pilot;
1379 break;
1380 case DTV_ROLLOFF:
1381 tvp->u.data = c->rolloff;
1382 break;
1383 case DTV_DELIVERY_SYSTEM:
1384 tvp->u.data = c->delivery_system;
1385 break;
1386 case DTV_VOLTAGE:
1387 tvp->u.data = c->voltage;
1388 break;
1389 case DTV_TONE:
1390 tvp->u.data = c->sectone;
1391 break;
1392 case DTV_API_VERSION:
1393 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1394 break;
1395 case DTV_CODE_RATE_HP:
1396 tvp->u.data = c->code_rate_HP;
1397 break;
1398 case DTV_CODE_RATE_LP:
1399 tvp->u.data = c->code_rate_LP;
1400 break;
1401 case DTV_GUARD_INTERVAL:
1402 tvp->u.data = c->guard_interval;
1403 break;
1404 case DTV_TRANSMISSION_MODE:
1405 tvp->u.data = c->transmission_mode;
1406 break;
1407 case DTV_HIERARCHY:
1408 tvp->u.data = c->hierarchy;
1409 break;
1410 case DTV_INTERLEAVING:
1411 tvp->u.data = c->interleaving;
1412 break;
1413
1414 /* ISDB-T Support here */
1415 case DTV_ISDBT_PARTIAL_RECEPTION:
1416 tvp->u.data = c->isdbt_partial_reception;
1417 break;
1418 case DTV_ISDBT_SOUND_BROADCASTING:
1419 tvp->u.data = c->isdbt_sb_mode;
1420 break;
1421 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1422 tvp->u.data = c->isdbt_sb_subchannel;
1423 break;
1424 case DTV_ISDBT_SB_SEGMENT_IDX:
1425 tvp->u.data = c->isdbt_sb_segment_idx;
1426 break;
1427 case DTV_ISDBT_SB_SEGMENT_COUNT:
1428 tvp->u.data = c->isdbt_sb_segment_count;
1429 break;
1430 case DTV_ISDBT_LAYER_ENABLED:
1431 tvp->u.data = c->isdbt_layer_enabled;
1432 break;
1433 case DTV_ISDBT_LAYERA_FEC:
1434 tvp->u.data = c->layer[0].fec;
1435 break;
1436 case DTV_ISDBT_LAYERA_MODULATION:
1437 tvp->u.data = c->layer[0].modulation;
1438 break;
1439 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1440 tvp->u.data = c->layer[0].segment_count;
1441 break;
1442 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1443 tvp->u.data = c->layer[0].interleaving;
1444 break;
1445 case DTV_ISDBT_LAYERB_FEC:
1446 tvp->u.data = c->layer[1].fec;
1447 break;
1448 case DTV_ISDBT_LAYERB_MODULATION:
1449 tvp->u.data = c->layer[1].modulation;
1450 break;
1451 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1452 tvp->u.data = c->layer[1].segment_count;
1453 break;
1454 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1455 tvp->u.data = c->layer[1].interleaving;
1456 break;
1457 case DTV_ISDBT_LAYERC_FEC:
1458 tvp->u.data = c->layer[2].fec;
1459 break;
1460 case DTV_ISDBT_LAYERC_MODULATION:
1461 tvp->u.data = c->layer[2].modulation;
1462 break;
1463 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1464 tvp->u.data = c->layer[2].segment_count;
1465 break;
1466 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1467 tvp->u.data = c->layer[2].interleaving;
1468 break;
1469
1470 /* Multistream support */
1471 case DTV_STREAM_ID:
1472 case DTV_DVBT2_PLP_ID_LEGACY:
1473 tvp->u.data = c->stream_id;
1474 break;
1475
1476 /* Physical layer scrambling support */
1477 case DTV_SCRAMBLING_SEQUENCE_INDEX:
1478 tvp->u.data = c->scrambling_sequence_index;
1479 break;
1480
1481 /* ATSC-MH */
1482 case DTV_ATSCMH_FIC_VER:
1483 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1484 break;
1485 case DTV_ATSCMH_PARADE_ID:
1486 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1487 break;
1488 case DTV_ATSCMH_NOG:
1489 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1490 break;
1491 case DTV_ATSCMH_TNOG:
1492 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1493 break;
1494 case DTV_ATSCMH_SGN:
1495 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1496 break;
1497 case DTV_ATSCMH_PRC:
1498 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1499 break;
1500 case DTV_ATSCMH_RS_FRAME_MODE:
1501 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1502 break;
1503 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1504 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1505 break;
1506 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1507 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1508 break;
1509 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1510 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1511 break;
1512 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1513 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1514 break;
1515 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1516 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1517 break;
1518 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1519 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1520 break;
1521 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1522 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1523 break;
1524 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1525 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1526 break;
1527
1528 case DTV_LNA:
1529 tvp->u.data = c->lna;
1530 break;
1531
1532 /* Fill quality measures */
1533 case DTV_STAT_SIGNAL_STRENGTH:
1534 tvp->u.st = c->strength;
1535 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1536 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1537 len = tvp->u.buffer.len;
1538 break;
1539 case DTV_STAT_CNR:
1540 tvp->u.st = c->cnr;
1541 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1542 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1543 len = tvp->u.buffer.len;
1544 break;
1545 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1546 tvp->u.st = c->pre_bit_error;
1547 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1548 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1549 len = tvp->u.buffer.len;
1550 break;
1551 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1552 tvp->u.st = c->pre_bit_count;
1553 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1554 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1555 len = tvp->u.buffer.len;
1556 break;
1557 case DTV_STAT_POST_ERROR_BIT_COUNT:
1558 tvp->u.st = c->post_bit_error;
1559 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1560 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1561 len = tvp->u.buffer.len;
1562 break;
1563 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1564 tvp->u.st = c->post_bit_count;
1565 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1566 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1567 len = tvp->u.buffer.len;
1568 break;
1569 case DTV_STAT_ERROR_BLOCK_COUNT:
1570 tvp->u.st = c->block_error;
1571 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1572 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1573 len = tvp->u.buffer.len;
1574 break;
1575 case DTV_STAT_TOTAL_BLOCK_COUNT:
1576 tvp->u.st = c->block_count;
1577 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1578 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1579 len = tvp->u.buffer.len;
1580 break;
1581 default:
1582 dev_dbg(fe->dvb->device,
1583 "%s: FE property %d doesn't exist\n",
1584 __func__, tvp->cmd);
1585 return -EINVAL;
1586 }
1587
1588 if (len < 1)
1589 len = 1;
1590
1591 dev_dbg(fe->dvb->device,
1592 "%s: GET cmd 0x%08x (%s) len %d: %*ph\n",
1593 __func__, tvp->cmd, dtv_cmd_name(tvp->cmd),
1594 tvp->u.buffer.len, tvp->u.buffer.len, tvp->u.buffer.data);
1595
1596 return 0;
1597}
1598
1599static int dtv_set_frontend(struct dvb_frontend *fe);
1600
1601static bool is_dvbv3_delsys(u32 delsys)
1602{
1603 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1604 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1605}
1606
1607/**
1608 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1609 * @fe: struct frontend;
1610 * @delsys: DVBv5 type that will be used for emulation
1611 *
1612 * Provides emulation for delivery systems that are compatible with the old
1613 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1614 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontend
1615 * parameters are compatible with DVB-S spec.
1616 */
1617static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1618{
1619 int i;
1620 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1621
1622 c->delivery_system = delsys;
1623
1624 /*
1625 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1626 */
1627 if (c->delivery_system == SYS_ISDBT) {
1628 dev_dbg(fe->dvb->device,
1629 "%s: Using defaults for SYS_ISDBT\n",
1630 __func__);
1631
1632 if (!c->bandwidth_hz)
1633 c->bandwidth_hz = 6000000;
1634
1635 c->isdbt_partial_reception = 0;
1636 c->isdbt_sb_mode = 0;
1637 c->isdbt_sb_subchannel = 0;
1638 c->isdbt_sb_segment_idx = 0;
1639 c->isdbt_sb_segment_count = 0;
1640 c->isdbt_layer_enabled = 7;
1641 for (i = 0; i < 3; i++) {
1642 c->layer[i].fec = FEC_AUTO;
1643 c->layer[i].modulation = QAM_AUTO;
1644 c->layer[i].interleaving = 0;
1645 c->layer[i].segment_count = 0;
1646 }
1647 }
1648 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1649 __func__, c->delivery_system);
1650
1651 return 0;
1652}
1653
1654/**
1655 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1656 * @fe: frontend struct
1657 * @desired_system: delivery system requested by the user
1658 *
1659 * A DVBv5 call know what's the desired system it wants. So, set it.
1660 *
1661 * There are, however, a few known issues with early DVBv5 applications that
1662 * are also handled by this logic:
1663 *
1664 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1665 * This is an API violation, but, as we don't want to break userspace,
1666 * convert it to the first supported delivery system.
1667 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1668 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1669 * ISDB-T provided backward compat with DVB-T.
1670 */
1671static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1672 u32 desired_system)
1673{
1674 int ncaps;
1675 u32 delsys = SYS_UNDEFINED;
1676 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1677 enum dvbv3_emulation_type type;
1678
1679 /*
1680 * It was reported that some old DVBv5 applications were
1681 * filling delivery_system with SYS_UNDEFINED. If this happens,
1682 * assume that the application wants to use the first supported
1683 * delivery system.
1684 */
1685 if (desired_system == SYS_UNDEFINED)
1686 desired_system = fe->ops.delsys[0];
1687
1688 /*
1689 * This is a DVBv5 call. So, it likely knows the supported
1690 * delivery systems. So, check if the desired delivery system is
1691 * supported
1692 */
1693 ncaps = 0;
1694 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1695 if (fe->ops.delsys[ncaps] == desired_system) {
1696 c->delivery_system = desired_system;
1697 dev_dbg(fe->dvb->device,
1698 "%s: Changing delivery system to %d\n",
1699 __func__, desired_system);
1700 return 0;
1701 }
1702 ncaps++;
1703 }
1704
1705 /*
1706 * The requested delivery system isn't supported. Maybe userspace
1707 * is requesting a DVBv3 compatible delivery system.
1708 *
1709 * The emulation only works if the desired system is one of the
1710 * delivery systems supported by DVBv3 API
1711 */
1712 if (!is_dvbv3_delsys(desired_system)) {
1713 dev_dbg(fe->dvb->device,
1714 "%s: Delivery system %d not supported.\n",
1715 __func__, desired_system);
1716 return -EINVAL;
1717 }
1718
1719 type = dvbv3_type(desired_system);
1720
1721 /*
1722 * Get the last non-DVBv3 delivery system that has the same type
1723 * of the desired system
1724 */
1725 ncaps = 0;
1726 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1727 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1728 delsys = fe->ops.delsys[ncaps];
1729 ncaps++;
1730 }
1731
1732 /* There's nothing compatible with the desired delivery system */
1733 if (delsys == SYS_UNDEFINED) {
1734 dev_dbg(fe->dvb->device,
1735 "%s: Delivery system %d not supported on emulation mode.\n",
1736 __func__, desired_system);
1737 return -EINVAL;
1738 }
1739
1740 dev_dbg(fe->dvb->device,
1741 "%s: Using delivery system %d emulated as if it were %d\n",
1742 __func__, delsys, desired_system);
1743
1744 return emulate_delivery_system(fe, desired_system);
1745}
1746
1747/**
1748 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1749 * @fe: frontend struct
1750 *
1751 * A DVBv3 call doesn't know what's the desired system it wants. It also
1752 * doesn't allow to switch between different types. Due to that, userspace
1753 * should use DVBv5 instead.
1754 * However, in order to avoid breaking userspace API, limited backward
1755 * compatibility support is provided.
1756 *
1757 * There are some delivery systems that are incompatible with DVBv3 calls.
1758 *
1759 * This routine should work fine for frontends that support just one delivery
1760 * system.
1761 *
1762 * For frontends that support multiple frontends:
1763 * 1) It defaults to use the first supported delivery system. There's an
1764 * userspace application that allows changing it at runtime;
1765 *
1766 * 2) If the current delivery system is not compatible with DVBv3, it gets
1767 * the first one that it is compatible.
1768 *
1769 * NOTE: in order for this to work with applications like Kaffeine that
1770 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1771 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1772 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1773 * to DVB-S.
1774 */
1775static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1776{
1777 int ncaps;
1778 u32 delsys = SYS_UNDEFINED;
1779 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1780
1781 /* If not set yet, defaults to the first supported delivery system */
1782 if (c->delivery_system == SYS_UNDEFINED)
1783 c->delivery_system = fe->ops.delsys[0];
1784
1785 /*
1786 * Trivial case: just use the current one, if it already a DVBv3
1787 * delivery system
1788 */
1789 if (is_dvbv3_delsys(c->delivery_system)) {
1790 dev_dbg(fe->dvb->device,
1791 "%s: Using delivery system to %d\n",
1792 __func__, c->delivery_system);
1793 return 0;
1794 }
1795
1796 /*
1797 * Seek for the first delivery system that it is compatible with a
1798 * DVBv3 standard
1799 */
1800 ncaps = 0;
1801 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1802 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1803 delsys = fe->ops.delsys[ncaps];
1804 break;
1805 }
1806 ncaps++;
1807 }
1808 if (delsys == SYS_UNDEFINED) {
1809 dev_dbg(fe->dvb->device,
1810 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1811 __func__);
1812 return -EINVAL;
1813 }
1814 return emulate_delivery_system(fe, delsys);
1815}
1816
1817static void prepare_tuning_algo_parameters(struct dvb_frontend *fe)
1818{
1819 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1820 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1821 struct dvb_frontend_tune_settings fetunesettings = { 0 };
1822
1823 /* get frontend-specific tuning settings */
1824 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1825 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1826 fepriv->max_drift = fetunesettings.max_drift;
1827 fepriv->step_size = fetunesettings.step_size;
1828 } else {
1829 /* default values */
1830 switch (c->delivery_system) {
1831 case SYS_DSS:
1832 case SYS_DVBS:
1833 case SYS_DVBS2:
1834 case SYS_ISDBS:
1835 case SYS_TURBO:
1836 case SYS_DVBC_ANNEX_A:
1837 case SYS_DVBC_ANNEX_C:
1838 fepriv->min_delay = HZ / 20;
1839 fepriv->step_size = c->symbol_rate / 16000;
1840 fepriv->max_drift = c->symbol_rate / 2000;
1841 break;
1842 case SYS_DVBT:
1843 case SYS_DVBT2:
1844 case SYS_ISDBT:
1845 case SYS_DTMB:
1846 fepriv->min_delay = HZ / 20;
1847 fepriv->step_size = dvb_frontend_get_stepsize(fe) * 2;
1848 fepriv->max_drift = fepriv->step_size + 1;
1849 break;
1850 default:
1851 /*
1852 * FIXME: This sounds wrong! if freqency_stepsize is
1853 * defined by the frontend, why not use it???
1854 */
1855 fepriv->min_delay = HZ / 20;
1856 fepriv->step_size = 0; /* no zigzag */
1857 fepriv->max_drift = 0;
1858 break;
1859 }
1860 }
1861 if (dvb_override_tune_delay > 0)
1862 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1863}
1864
1865/**
1866 * dtv_property_process_set - Sets a single DTV property
1867 * @fe: Pointer to &struct dvb_frontend
1868 * @file: Pointer to &struct file
1869 * @cmd: Digital TV command
1870 * @data: An unsigned 32-bits number
1871 *
1872 * This routine assigns the property
1873 * value to the corresponding member of
1874 * &struct dtv_frontend_properties
1875 *
1876 * Returns:
1877 * Zero on success, negative errno on failure.
1878 */
1879static int dtv_property_process_set(struct dvb_frontend *fe,
1880 struct file *file,
1881 u32 cmd, u32 data)
1882{
1883 int r = 0;
1884 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1885
1886 /** Dump DTV command name and value*/
1887 if (!cmd || cmd > DTV_MAX_COMMAND)
1888 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n",
1889 __func__, cmd);
1890 else
1891 dev_dbg(fe->dvb->device,
1892 "%s: SET cmd 0x%08x (%s) to 0x%08x\n",
1893 __func__, cmd, dtv_cmd_name(cmd), data);
1894 switch (cmd) {
1895 case DTV_CLEAR:
1896 /*
1897 * Reset a cache of data specific to the frontend here. This does
1898 * not effect hardware.
1899 */
1900 dvb_frontend_clear_cache(fe);
1901 break;
1902 case DTV_TUNE:
1903 /*
1904 * Use the cached Digital TV properties to tune the
1905 * frontend
1906 */
1907 dev_dbg(fe->dvb->device,
1908 "%s: Setting the frontend from property cache\n",
1909 __func__);
1910
1911 r = dtv_set_frontend(fe);
1912 break;
1913 case DTV_FREQUENCY:
1914 c->frequency = data;
1915 break;
1916 case DTV_MODULATION:
1917 c->modulation = data;
1918 break;
1919 case DTV_BANDWIDTH_HZ:
1920 c->bandwidth_hz = data;
1921 break;
1922 case DTV_INVERSION:
1923 c->inversion = data;
1924 break;
1925 case DTV_SYMBOL_RATE:
1926 c->symbol_rate = data;
1927 break;
1928 case DTV_INNER_FEC:
1929 c->fec_inner = data;
1930 break;
1931 case DTV_PILOT:
1932 c->pilot = data;
1933 break;
1934 case DTV_ROLLOFF:
1935 c->rolloff = data;
1936 break;
1937 case DTV_DELIVERY_SYSTEM:
1938 r = dvbv5_set_delivery_system(fe, data);
1939 break;
1940 case DTV_VOLTAGE:
1941 c->voltage = data;
1942 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
1943 (void *)c->voltage);
1944 break;
1945 case DTV_TONE:
1946 c->sectone = data;
1947 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
1948 (void *)c->sectone);
1949 break;
1950 case DTV_CODE_RATE_HP:
1951 c->code_rate_HP = data;
1952 break;
1953 case DTV_CODE_RATE_LP:
1954 c->code_rate_LP = data;
1955 break;
1956 case DTV_GUARD_INTERVAL:
1957 c->guard_interval = data;
1958 break;
1959 case DTV_TRANSMISSION_MODE:
1960 c->transmission_mode = data;
1961 break;
1962 case DTV_HIERARCHY:
1963 c->hierarchy = data;
1964 break;
1965 case DTV_INTERLEAVING:
1966 c->interleaving = data;
1967 break;
1968
1969 /* ISDB-T Support here */
1970 case DTV_ISDBT_PARTIAL_RECEPTION:
1971 c->isdbt_partial_reception = data;
1972 break;
1973 case DTV_ISDBT_SOUND_BROADCASTING:
1974 c->isdbt_sb_mode = data;
1975 break;
1976 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1977 c->isdbt_sb_subchannel = data;
1978 break;
1979 case DTV_ISDBT_SB_SEGMENT_IDX:
1980 c->isdbt_sb_segment_idx = data;
1981 break;
1982 case DTV_ISDBT_SB_SEGMENT_COUNT:
1983 c->isdbt_sb_segment_count = data;
1984 break;
1985 case DTV_ISDBT_LAYER_ENABLED:
1986 c->isdbt_layer_enabled = data;
1987 break;
1988 case DTV_ISDBT_LAYERA_FEC:
1989 c->layer[0].fec = data;
1990 break;
1991 case DTV_ISDBT_LAYERA_MODULATION:
1992 c->layer[0].modulation = data;
1993 break;
1994 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1995 c->layer[0].segment_count = data;
1996 break;
1997 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1998 c->layer[0].interleaving = data;
1999 break;
2000 case DTV_ISDBT_LAYERB_FEC:
2001 c->layer[1].fec = data;
2002 break;
2003 case DTV_ISDBT_LAYERB_MODULATION:
2004 c->layer[1].modulation = data;
2005 break;
2006 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
2007 c->layer[1].segment_count = data;
2008 break;
2009 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
2010 c->layer[1].interleaving = data;
2011 break;
2012 case DTV_ISDBT_LAYERC_FEC:
2013 c->layer[2].fec = data;
2014 break;
2015 case DTV_ISDBT_LAYERC_MODULATION:
2016 c->layer[2].modulation = data;
2017 break;
2018 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
2019 c->layer[2].segment_count = data;
2020 break;
2021 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
2022 c->layer[2].interleaving = data;
2023 break;
2024
2025 /* Multistream support */
2026 case DTV_STREAM_ID:
2027 case DTV_DVBT2_PLP_ID_LEGACY:
2028 c->stream_id = data;
2029 break;
2030
2031 /* Physical layer scrambling support */
2032 case DTV_SCRAMBLING_SEQUENCE_INDEX:
2033 c->scrambling_sequence_index = data;
2034 break;
2035
2036 /* ATSC-MH */
2037 case DTV_ATSCMH_PARADE_ID:
2038 fe->dtv_property_cache.atscmh_parade_id = data;
2039 break;
2040 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
2041 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data;
2042 break;
2043
2044 case DTV_LNA:
2045 c->lna = data;
2046 if (fe->ops.set_lna)
2047 r = fe->ops.set_lna(fe);
2048 if (r < 0)
2049 c->lna = LNA_AUTO;
2050 break;
2051
2052 default:
2053 return -EINVAL;
2054 }
2055
2056 return r;
2057}
2058
2059static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd,
2060 void *parg)
2061{
2062 struct dvb_device *dvbdev = file->private_data;
2063 struct dvb_frontend *fe = dvbdev->priv;
2064 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2065 int err;
2066
2067 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
2068 if (down_interruptible(&fepriv->sem))
2069 return -ERESTARTSYS;
2070
2071 if (fe->exit != DVB_FE_NO_EXIT) {
2072 up(&fepriv->sem);
2073 return -ENODEV;
2074 }
2075
2076 /*
2077 * If the frontend is opened in read-only mode, only the ioctls
2078 * that don't interfere with the tune logic should be accepted.
2079 * That allows an external application to monitor the DVB QoS and
2080 * statistics parameters.
2081 *
2082 * That matches all _IOR() ioctls, except for two special cases:
2083 * - FE_GET_EVENT is part of the tuning logic on a DVB application;
2084 * - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0
2085 * setup
2086 * So, those two ioctls should also return -EPERM, as otherwise
2087 * reading from them would interfere with a DVB tune application
2088 */
2089 if ((file->f_flags & O_ACCMODE) == O_RDONLY
2090 && (_IOC_DIR(cmd) != _IOC_READ
2091 || cmd == FE_GET_EVENT
2092 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2093 up(&fepriv->sem);
2094 return -EPERM;
2095 }
2096
2097 err = dvb_frontend_handle_ioctl(file, cmd, parg);
2098
2099 up(&fepriv->sem);
2100 return err;
2101}
2102
2103static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
2104 unsigned long arg)
2105{
2106 struct dvb_device *dvbdev = file->private_data;
2107
2108 if (!dvbdev)
2109 return -ENODEV;
2110
2111 return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
2112}
2113
2114#ifdef CONFIG_COMPAT
2115struct compat_dtv_property {
2116 __u32 cmd;
2117 __u32 reserved[3];
2118 union {
2119 __u32 data;
2120 struct dtv_fe_stats st;
2121 struct {
2122 __u8 data[32];
2123 __u32 len;
2124 __u32 reserved1[3];
2125 compat_uptr_t reserved2;
2126 } buffer;
2127 } u;
2128 int result;
2129} __attribute__ ((packed));
2130
2131struct compat_dtv_properties {
2132 __u32 num;
2133 compat_uptr_t props;
2134};
2135
2136#define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties)
2137#define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties)
2138
2139static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd,
2140 unsigned long arg)
2141{
2142 struct dvb_device *dvbdev = file->private_data;
2143 struct dvb_frontend *fe = dvbdev->priv;
2144 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2145 int i, err = 0;
2146
2147 if (cmd == COMPAT_FE_SET_PROPERTY) {
2148 struct compat_dtv_properties prop, *tvps = NULL;
2149 struct compat_dtv_property *tvp = NULL;
2150
2151 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2152 return -EFAULT;
2153
2154 tvps = ∝
2155
2156 /*
2157 * Put an arbitrary limit on the number of messages that can
2158 * be sent at once
2159 */
2160 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2161 return -EINVAL;
2162
2163 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2164 if (IS_ERR(tvp))
2165 return PTR_ERR(tvp);
2166
2167 for (i = 0; i < tvps->num; i++) {
2168 err = dtv_property_process_set(fe, file,
2169 (tvp + i)->cmd,
2170 (tvp + i)->u.data);
2171 if (err < 0) {
2172 kfree(tvp);
2173 return err;
2174 }
2175 }
2176 kfree(tvp);
2177 } else if (cmd == COMPAT_FE_GET_PROPERTY) {
2178 struct compat_dtv_properties prop, *tvps = NULL;
2179 struct compat_dtv_property *tvp = NULL;
2180 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2181
2182 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2183 return -EFAULT;
2184
2185 tvps = ∝
2186
2187 /*
2188 * Put an arbitrary limit on the number of messages that can
2189 * be sent at once
2190 */
2191 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2192 return -EINVAL;
2193
2194 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2195 if (IS_ERR(tvp))
2196 return PTR_ERR(tvp);
2197
2198 /*
2199 * Let's use our own copy of property cache, in order to
2200 * avoid mangling with DTV zigzag logic, as drivers might
2201 * return crap, if they don't check if the data is available
2202 * before updating the properties cache.
2203 */
2204 if (fepriv->state != FESTATE_IDLE) {
2205 err = dtv_get_frontend(fe, &getp, NULL);
2206 if (err < 0) {
2207 kfree(tvp);
2208 return err;
2209 }
2210 }
2211 for (i = 0; i < tvps->num; i++) {
2212 err = dtv_property_process_get(
2213 fe, &getp, (struct dtv_property *)(tvp + i), file);
2214 if (err < 0) {
2215 kfree(tvp);
2216 return err;
2217 }
2218 }
2219
2220 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp,
2221 tvps->num * sizeof(struct compat_dtv_property))) {
2222 kfree(tvp);
2223 return -EFAULT;
2224 }
2225 kfree(tvp);
2226 }
2227
2228 return err;
2229}
2230
2231static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd,
2232 unsigned long arg)
2233{
2234 struct dvb_device *dvbdev = file->private_data;
2235 struct dvb_frontend *fe = dvbdev->priv;
2236 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2237 int err;
2238
2239 if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) {
2240 if (down_interruptible(&fepriv->sem))
2241 return -ERESTARTSYS;
2242
2243 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg);
2244
2245 up(&fepriv->sem);
2246 return err;
2247 }
2248
2249 return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2250}
2251#endif
2252
2253static int dtv_set_frontend(struct dvb_frontend *fe)
2254{
2255 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2256 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2257 u32 rolloff = 0;
2258
2259 if (dvb_frontend_check_parameters(fe) < 0)
2260 return -EINVAL;
2261
2262 /*
2263 * Initialize output parameters to match the values given by
2264 * the user. FE_SET_FRONTEND triggers an initial frontend event
2265 * with status = 0, which copies output parameters to userspace.
2266 */
2267 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2268
2269 /*
2270 * Be sure that the bandwidth will be filled for all
2271 * non-satellite systems, as tuners need to know what
2272 * low pass/Nyquist half filter should be applied, in
2273 * order to avoid inter-channel noise.
2274 *
2275 * ISDB-T and DVB-T/T2 already sets bandwidth.
2276 * ATSC and DVB-C don't set, so, the core should fill it.
2277 *
2278 * On DVB-C Annex A and C, the bandwidth is a function of
2279 * the roll-off and symbol rate. Annex B defines different
2280 * roll-off factors depending on the modulation. Fortunately,
2281 * Annex B is only used with 6MHz, so there's no need to
2282 * calculate it.
2283 *
2284 * While not officially supported, a side effect of handling it at
2285 * the cache level is that a program could retrieve the bandwidth
2286 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2287 */
2288 switch (c->delivery_system) {
2289 case SYS_ATSC:
2290 case SYS_DVBC_ANNEX_B:
2291 c->bandwidth_hz = 6000000;
2292 break;
2293 case SYS_DVBC_ANNEX_A:
2294 rolloff = 115;
2295 break;
2296 case SYS_DVBC_ANNEX_C:
2297 rolloff = 113;
2298 break;
2299 case SYS_DSS:
2300 rolloff = 120;
2301 break;
2302 case SYS_DVBS:
2303 case SYS_TURBO:
2304 case SYS_ISDBS:
2305 rolloff = 135;
2306 break;
2307 case SYS_DVBS2:
2308 switch (c->rolloff) {
2309 case ROLLOFF_20:
2310 rolloff = 120;
2311 break;
2312 case ROLLOFF_25:
2313 rolloff = 125;
2314 break;
2315 default:
2316 case ROLLOFF_35:
2317 rolloff = 135;
2318 }
2319 break;
2320 default:
2321 break;
2322 }
2323 if (rolloff)
2324 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2325
2326 /* force auto frequency inversion if requested */
2327 if (dvb_force_auto_inversion)
2328 c->inversion = INVERSION_AUTO;
2329
2330 /*
2331 * without hierarchical coding code_rate_LP is irrelevant,
2332 * so we tolerate the otherwise invalid FEC_NONE setting
2333 */
2334 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2335 c->code_rate_LP = FEC_AUTO;
2336
2337 prepare_tuning_algo_parameters(fe);
2338
2339 fepriv->state = FESTATE_RETUNE;
2340
2341 /* Request the search algorithm to search */
2342 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2343
2344 dvb_frontend_clear_events(fe);
2345 dvb_frontend_add_event(fe, 0);
2346 dvb_frontend_wakeup(fe);
2347 fepriv->status = 0;
2348
2349 return 0;
2350}
2351
2352static int dvb_get_property(struct dvb_frontend *fe, struct file *file,
2353 struct dtv_properties *tvps)
2354{
2355 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2356 struct dtv_property *tvp = NULL;
2357 struct dtv_frontend_properties getp;
2358 int i, err;
2359
2360 memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
2361
2362 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2363 __func__, tvps->num);
2364 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2365 __func__, tvps->props);
2366
2367 /*
2368 * Put an arbitrary limit on the number of messages that can
2369 * be sent at once
2370 */
2371 if (!tvps->num || tvps->num > DTV_IOCTL_MAX_MSGS)
2372 return -EINVAL;
2373
2374 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2375 if (IS_ERR(tvp))
2376 return PTR_ERR(tvp);
2377
2378 /*
2379 * Let's use our own copy of property cache, in order to
2380 * avoid mangling with DTV zigzag logic, as drivers might
2381 * return crap, if they don't check if the data is available
2382 * before updating the properties cache.
2383 */
2384 if (fepriv->state != FESTATE_IDLE) {
2385 err = dtv_get_frontend(fe, &getp, NULL);
2386 if (err < 0)
2387 goto out;
2388 }
2389 for (i = 0; i < tvps->num; i++) {
2390 err = dtv_property_process_get(fe, &getp,
2391 tvp + i, file);
2392 if (err < 0)
2393 goto out;
2394 }
2395
2396 if (copy_to_user((void __user *)tvps->props, tvp,
2397 tvps->num * sizeof(struct dtv_property))) {
2398 err = -EFAULT;
2399 goto out;
2400 }
2401
2402 err = 0;
2403out:
2404 kfree(tvp);
2405 return err;
2406}
2407
2408static int dvb_get_frontend(struct dvb_frontend *fe,
2409 struct dvb_frontend_parameters *p_out)
2410{
2411 struct dtv_frontend_properties getp;
2412
2413 /*
2414 * Let's use our own copy of property cache, in order to
2415 * avoid mangling with DTV zigzag logic, as drivers might
2416 * return crap, if they don't check if the data is available
2417 * before updating the properties cache.
2418 */
2419 memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
2420
2421 return dtv_get_frontend(fe, &getp, p_out);
2422}
2423
2424static int dvb_frontend_handle_ioctl(struct file *file,
2425 unsigned int cmd, void *parg)
2426{
2427 struct dvb_device *dvbdev = file->private_data;
2428 struct dvb_frontend *fe = dvbdev->priv;
2429 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2430 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2431 int i, err = -ENOTSUPP;
2432
2433 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2434
2435 switch (cmd) {
2436 case FE_SET_PROPERTY: {
2437 struct dtv_properties *tvps = parg;
2438 struct dtv_property *tvp = NULL;
2439
2440 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2441 __func__, tvps->num);
2442 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2443 __func__, tvps->props);
2444
2445 /*
2446 * Put an arbitrary limit on the number of messages that can
2447 * be sent at once
2448 */
2449 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2450 return -EINVAL;
2451
2452 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2453 if (IS_ERR(tvp))
2454 return PTR_ERR(tvp);
2455
2456 for (i = 0; i < tvps->num; i++) {
2457 err = dtv_property_process_set(fe, file,
2458 (tvp + i)->cmd,
2459 (tvp + i)->u.data);
2460 if (err < 0) {
2461 kfree(tvp);
2462 return err;
2463 }
2464 }
2465 kfree(tvp);
2466 err = 0;
2467 break;
2468 }
2469 case FE_GET_PROPERTY:
2470 err = dvb_get_property(fe, file, parg);
2471 break;
2472
2473 case FE_GET_INFO: {
2474 struct dvb_frontend_info *info = parg;
2475 memset(info, 0, sizeof(*info));
2476
2477 strscpy(info->name, fe->ops.info.name, sizeof(info->name));
2478 info->symbol_rate_min = fe->ops.info.symbol_rate_min;
2479 info->symbol_rate_max = fe->ops.info.symbol_rate_max;
2480 info->symbol_rate_tolerance = fe->ops.info.symbol_rate_tolerance;
2481 info->caps = fe->ops.info.caps;
2482 info->frequency_stepsize = dvb_frontend_get_stepsize(fe);
2483 dvb_frontend_get_frequency_limits(fe, &info->frequency_min,
2484 &info->frequency_max,
2485 &info->frequency_tolerance);
2486
2487 /*
2488 * Associate the 4 delivery systems supported by DVBv3
2489 * API with their DVBv5 counterpart. For the other standards,
2490 * use the closest type, assuming that it would hopefully
2491 * work with a DVBv3 application.
2492 * It should be noticed that, on multi-frontend devices with
2493 * different types (terrestrial and cable, for example),
2494 * a pure DVBv3 application won't be able to use all delivery
2495 * systems. Yet, changing the DVBv5 cache to the other delivery
2496 * system should be enough for making it work.
2497 */
2498 switch (dvbv3_type(c->delivery_system)) {
2499 case DVBV3_QPSK:
2500 info->type = FE_QPSK;
2501 break;
2502 case DVBV3_ATSC:
2503 info->type = FE_ATSC;
2504 break;
2505 case DVBV3_QAM:
2506 info->type = FE_QAM;
2507 break;
2508 case DVBV3_OFDM:
2509 info->type = FE_OFDM;
2510 break;
2511 default:
2512 dev_err(fe->dvb->device,
2513 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2514 __func__, c->delivery_system);
2515 info->type = FE_OFDM;
2516 }
2517 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2518 __func__, c->delivery_system, info->type);
2519
2520 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2521 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2522 info->caps |= FE_CAN_INVERSION_AUTO;
2523 err = 0;
2524 break;
2525 }
2526
2527 case FE_READ_STATUS: {
2528 enum fe_status *status = parg;
2529
2530 /* if retune was requested but hasn't occurred yet, prevent
2531 * that user get signal state from previous tuning */
2532 if (fepriv->state == FESTATE_RETUNE ||
2533 fepriv->state == FESTATE_ERROR) {
2534 err = 0;
2535 *status = 0;
2536 break;
2537 }
2538
2539 if (fe->ops.read_status)
2540 err = fe->ops.read_status(fe, status);
2541 break;
2542 }
2543
2544 case FE_DISEQC_RESET_OVERLOAD:
2545 if (fe->ops.diseqc_reset_overload) {
2546 err = fe->ops.diseqc_reset_overload(fe);
2547 fepriv->state = FESTATE_DISEQC;
2548 fepriv->status = 0;
2549 }
2550 break;
2551
2552 case FE_DISEQC_SEND_MASTER_CMD:
2553 if (fe->ops.diseqc_send_master_cmd) {
2554 struct dvb_diseqc_master_cmd *cmd = parg;
2555
2556 if (cmd->msg_len > sizeof(cmd->msg)) {
2557 err = -EINVAL;
2558 break;
2559 }
2560 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2561 fepriv->state = FESTATE_DISEQC;
2562 fepriv->status = 0;
2563 }
2564 break;
2565
2566 case FE_DISEQC_SEND_BURST:
2567 if (fe->ops.diseqc_send_burst) {
2568 err = fe->ops.diseqc_send_burst(fe, (long)parg);
2569 fepriv->state = FESTATE_DISEQC;
2570 fepriv->status = 0;
2571 }
2572 break;
2573
2574 case FE_SET_TONE:
2575 if (fe->ops.set_tone) {
2576 fepriv->tone = (long)parg;
2577 err = fe->ops.set_tone(fe, fepriv->tone);
2578 fepriv->state = FESTATE_DISEQC;
2579 fepriv->status = 0;
2580 }
2581 break;
2582
2583 case FE_SET_VOLTAGE:
2584 if (fe->ops.set_voltage) {
2585 fepriv->voltage = (long)parg;
2586 err = fe->ops.set_voltage(fe, fepriv->voltage);
2587 fepriv->state = FESTATE_DISEQC;
2588 fepriv->status = 0;
2589 }
2590 break;
2591
2592 case FE_DISEQC_RECV_SLAVE_REPLY:
2593 if (fe->ops.diseqc_recv_slave_reply)
2594 err = fe->ops.diseqc_recv_slave_reply(fe, parg);
2595 break;
2596
2597 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2598 if (fe->ops.enable_high_lnb_voltage)
2599 err = fe->ops.enable_high_lnb_voltage(fe, (long)parg);
2600 break;
2601
2602 case FE_SET_FRONTEND_TUNE_MODE:
2603 fepriv->tune_mode_flags = (unsigned long)parg;
2604 err = 0;
2605 break;
2606 /* DEPRECATED dish control ioctls */
2607
2608 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2609 if (fe->ops.dishnetwork_send_legacy_command) {
2610 err = fe->ops.dishnetwork_send_legacy_command(fe,
2611 (unsigned long)parg);
2612 fepriv->state = FESTATE_DISEQC;
2613 fepriv->status = 0;
2614 } else if (fe->ops.set_voltage) {
2615 /*
2616 * NOTE: This is a fallback condition. Some frontends
2617 * (stv0299 for instance) take longer than 8msec to
2618 * respond to a set_voltage command. Those switches
2619 * need custom routines to switch properly. For all
2620 * other frontends, the following should work ok.
2621 * Dish network legacy switches (as used by Dish500)
2622 * are controlled by sending 9-bit command words
2623 * spaced 8msec apart.
2624 * the actual command word is switch/port dependent
2625 * so it is up to the userspace application to send
2626 * the right command.
2627 * The command must always start with a '0' after
2628 * initialization, so parg is 8 bits and does not
2629 * include the initialization or start bit
2630 */
2631 unsigned long swcmd = ((unsigned long)parg) << 1;
2632 ktime_t nexttime;
2633 ktime_t tv[10];
2634 int i;
2635 u8 last = 1;
2636
2637 if (dvb_frontend_debug)
2638 dprintk("switch command: 0x%04lx\n",
2639 swcmd);
2640 nexttime = ktime_get_boottime();
2641 if (dvb_frontend_debug)
2642 tv[0] = nexttime;
2643 /* before sending a command, initialize by sending
2644 * a 32ms 18V to the switch
2645 */
2646 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2647 dvb_frontend_sleep_until(&nexttime, 32000);
2648
2649 for (i = 0; i < 9; i++) {
2650 if (dvb_frontend_debug)
2651 tv[i + 1] = ktime_get_boottime();
2652 if ((swcmd & 0x01) != last) {
2653 /* set voltage to (last ? 13V : 18V) */
2654 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2655 last = (last) ? 0 : 1;
2656 }
2657 swcmd = swcmd >> 1;
2658 if (i != 8)
2659 dvb_frontend_sleep_until(&nexttime, 8000);
2660 }
2661 if (dvb_frontend_debug) {
2662 dprintk("(adapter %d): switch delay (should be 32k followed by all 8k)\n",
2663 fe->dvb->num);
2664 for (i = 1; i < 10; i++)
2665 pr_info("%d: %d\n", i,
2666 (int)ktime_us_delta(tv[i], tv[i - 1]));
2667 }
2668 err = 0;
2669 fepriv->state = FESTATE_DISEQC;
2670 fepriv->status = 0;
2671 }
2672 break;
2673
2674 /* DEPRECATED statistics ioctls */
2675
2676 case FE_READ_BER:
2677 if (fe->ops.read_ber) {
2678 if (fepriv->thread)
2679 err = fe->ops.read_ber(fe, parg);
2680 else
2681 err = -EAGAIN;
2682 }
2683 break;
2684
2685 case FE_READ_SIGNAL_STRENGTH:
2686 if (fe->ops.read_signal_strength) {
2687 if (fepriv->thread)
2688 err = fe->ops.read_signal_strength(fe, parg);
2689 else
2690 err = -EAGAIN;
2691 }
2692 break;
2693
2694 case FE_READ_SNR:
2695 if (fe->ops.read_snr) {
2696 if (fepriv->thread)
2697 err = fe->ops.read_snr(fe, parg);
2698 else
2699 err = -EAGAIN;
2700 }
2701 break;
2702
2703 case FE_READ_UNCORRECTED_BLOCKS:
2704 if (fe->ops.read_ucblocks) {
2705 if (fepriv->thread)
2706 err = fe->ops.read_ucblocks(fe, parg);
2707 else
2708 err = -EAGAIN;
2709 }
2710 break;
2711
2712 /* DEPRECATED DVBv3 ioctls */
2713
2714 case FE_SET_FRONTEND:
2715 err = dvbv3_set_delivery_system(fe);
2716 if (err)
2717 break;
2718
2719 err = dtv_property_cache_sync(fe, c, parg);
2720 if (err)
2721 break;
2722 err = dtv_set_frontend(fe);
2723 break;
2724
2725 case FE_GET_EVENT:
2726 err = dvb_frontend_get_event(fe, parg, file->f_flags);
2727 break;
2728
2729 case FE_GET_FRONTEND:
2730 err = dvb_get_frontend(fe, parg);
2731 break;
2732
2733 default:
2734 return -ENOTSUPP;
2735 } /* switch */
2736
2737 return err;
2738}
2739
2740static __poll_t dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2741{
2742 struct dvb_device *dvbdev = file->private_data;
2743 struct dvb_frontend *fe = dvbdev->priv;
2744 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2745
2746 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2747
2748 poll_wait(file, &fepriv->events.wait_queue, wait);
2749
2750 if (fepriv->events.eventw != fepriv->events.eventr)
2751 return (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
2752
2753 return 0;
2754}
2755
2756static int dvb_frontend_open(struct inode *inode, struct file *file)
2757{
2758 struct dvb_device *dvbdev = file->private_data;
2759 struct dvb_frontend *fe = dvbdev->priv;
2760 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2761 struct dvb_adapter *adapter = fe->dvb;
2762 int ret;
2763
2764 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2765 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2766 return -ENODEV;
2767
2768 if (adapter->mfe_shared == 2) {
2769 mutex_lock(&adapter->mfe_lock);
2770 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2771 if (adapter->mfe_dvbdev &&
2772 !adapter->mfe_dvbdev->writers) {
2773 mutex_unlock(&adapter->mfe_lock);
2774 return -EBUSY;
2775 }
2776 adapter->mfe_dvbdev = dvbdev;
2777 }
2778 } else if (adapter->mfe_shared) {
2779 mutex_lock(&adapter->mfe_lock);
2780
2781 if (!adapter->mfe_dvbdev)
2782 adapter->mfe_dvbdev = dvbdev;
2783
2784 else if (adapter->mfe_dvbdev != dvbdev) {
2785 struct dvb_device
2786 *mfedev = adapter->mfe_dvbdev;
2787 struct dvb_frontend
2788 *mfe = mfedev->priv;
2789 struct dvb_frontend_private
2790 *mfepriv = mfe->frontend_priv;
2791 int mferetry = (dvb_mfe_wait_time << 1);
2792
2793 mutex_unlock(&adapter->mfe_lock);
2794 while (mferetry-- && (mfedev->users != -1 ||
2795 mfepriv->thread)) {
2796 if (msleep_interruptible(500)) {
2797 if (signal_pending(current))
2798 return -EINTR;
2799 }
2800 }
2801
2802 mutex_lock(&adapter->mfe_lock);
2803 if (adapter->mfe_dvbdev != dvbdev) {
2804 mfedev = adapter->mfe_dvbdev;
2805 mfe = mfedev->priv;
2806 mfepriv = mfe->frontend_priv;
2807 if (mfedev->users != -1 ||
2808 mfepriv->thread) {
2809 mutex_unlock(&adapter->mfe_lock);
2810 return -EBUSY;
2811 }
2812 adapter->mfe_dvbdev = dvbdev;
2813 }
2814 }
2815 }
2816
2817 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2818 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2819 goto err0;
2820
2821 /* If we took control of the bus, we need to force
2822 reinitialization. This is because many ts_bus_ctrl()
2823 functions strobe the RESET pin on the demod, and if the
2824 frontend thread already exists then the dvb_init() routine
2825 won't get called (which is what usually does initial
2826 register configuration). */
2827 fepriv->reinitialise = 1;
2828 }
2829
2830 if ((ret = dvb_generic_open(inode, file)) < 0)
2831 goto err1;
2832
2833 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2834 /* normal tune mode when opened R/W */
2835 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2836 fepriv->tone = -1;
2837 fepriv->voltage = -1;
2838
2839#ifdef CONFIG_MEDIA_CONTROLLER_DVB
2840 mutex_lock(&fe->dvb->mdev_lock);
2841 if (fe->dvb->mdev) {
2842 mutex_lock(&fe->dvb->mdev->graph_mutex);
2843 if (fe->dvb->mdev->enable_source)
2844 ret = fe->dvb->mdev->enable_source(
2845 dvbdev->entity,
2846 &fepriv->pipe);
2847 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2848 if (ret) {
2849 mutex_unlock(&fe->dvb->mdev_lock);
2850 dev_err(fe->dvb->device,
2851 "Tuner is busy. Error %d\n", ret);
2852 goto err2;
2853 }
2854 }
2855 mutex_unlock(&fe->dvb->mdev_lock);
2856#endif
2857 ret = dvb_frontend_start(fe);
2858 if (ret)
2859 goto err3;
2860
2861 /* empty event queue */
2862 fepriv->events.eventr = fepriv->events.eventw = 0;
2863 }
2864
2865 dvb_frontend_get(fe);
2866
2867 if (adapter->mfe_shared)
2868 mutex_unlock(&adapter->mfe_lock);
2869 return ret;
2870
2871err3:
2872#ifdef CONFIG_MEDIA_CONTROLLER_DVB
2873 mutex_lock(&fe->dvb->mdev_lock);
2874 if (fe->dvb->mdev) {
2875 mutex_lock(&fe->dvb->mdev->graph_mutex);
2876 if (fe->dvb->mdev->disable_source)
2877 fe->dvb->mdev->disable_source(dvbdev->entity);
2878 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2879 }
2880 mutex_unlock(&fe->dvb->mdev_lock);
2881err2:
2882#endif
2883 dvb_generic_release(inode, file);
2884err1:
2885 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2886 fe->ops.ts_bus_ctrl(fe, 0);
2887err0:
2888 if (adapter->mfe_shared)
2889 mutex_unlock(&adapter->mfe_lock);
2890 return ret;
2891}
2892
2893static int dvb_frontend_release(struct inode *inode, struct file *file)
2894{
2895 struct dvb_device *dvbdev = file->private_data;
2896 struct dvb_frontend *fe = dvbdev->priv;
2897 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2898 int ret;
2899
2900 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2901
2902 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2903 fepriv->release_jiffies = jiffies;
2904 mb();
2905 }
2906
2907 ret = dvb_generic_release(inode, file);
2908
2909 if (dvbdev->users == -1) {
2910 wake_up(&fepriv->wait_queue);
2911#ifdef CONFIG_MEDIA_CONTROLLER_DVB
2912 mutex_lock(&fe->dvb->mdev_lock);
2913 if (fe->dvb->mdev) {
2914 mutex_lock(&fe->dvb->mdev->graph_mutex);
2915 if (fe->dvb->mdev->disable_source)
2916 fe->dvb->mdev->disable_source(dvbdev->entity);
2917 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2918 }
2919 mutex_unlock(&fe->dvb->mdev_lock);
2920#endif
2921 if (fe->exit != DVB_FE_NO_EXIT)
2922 wake_up(&dvbdev->wait_queue);
2923 if (fe->ops.ts_bus_ctrl)
2924 fe->ops.ts_bus_ctrl(fe, 0);
2925 }
2926
2927 dvb_frontend_put(fe);
2928
2929 return ret;
2930}
2931
2932static const struct file_operations dvb_frontend_fops = {
2933 .owner = THIS_MODULE,
2934 .unlocked_ioctl = dvb_frontend_ioctl,
2935#ifdef CONFIG_COMPAT
2936 .compat_ioctl = dvb_frontend_compat_ioctl,
2937#endif
2938 .poll = dvb_frontend_poll,
2939 .open = dvb_frontend_open,
2940 .release = dvb_frontend_release,
2941 .llseek = noop_llseek,
2942};
2943
2944int dvb_frontend_suspend(struct dvb_frontend *fe)
2945{
2946 int ret = 0;
2947
2948 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2949 fe->id);
2950
2951 if (fe->ops.tuner_ops.suspend)
2952 ret = fe->ops.tuner_ops.suspend(fe);
2953 else if (fe->ops.tuner_ops.sleep)
2954 ret = fe->ops.tuner_ops.sleep(fe);
2955
2956 if (fe->ops.suspend)
2957 ret = fe->ops.suspend(fe);
2958 else if (fe->ops.sleep)
2959 ret = fe->ops.sleep(fe);
2960
2961 return ret;
2962}
2963EXPORT_SYMBOL(dvb_frontend_suspend);
2964
2965int dvb_frontend_resume(struct dvb_frontend *fe)
2966{
2967 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2968 int ret = 0;
2969
2970 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2971 fe->id);
2972
2973 fe->exit = DVB_FE_DEVICE_RESUME;
2974 if (fe->ops.resume)
2975 ret = fe->ops.resume(fe);
2976 else if (fe->ops.init)
2977 ret = fe->ops.init(fe);
2978
2979 if (fe->ops.tuner_ops.resume)
2980 ret = fe->ops.tuner_ops.resume(fe);
2981 else if (fe->ops.tuner_ops.init)
2982 ret = fe->ops.tuner_ops.init(fe);
2983
2984 if (fe->ops.set_tone && fepriv->tone != -1)
2985 fe->ops.set_tone(fe, fepriv->tone);
2986 if (fe->ops.set_voltage && fepriv->voltage != -1)
2987 fe->ops.set_voltage(fe, fepriv->voltage);
2988
2989 fe->exit = DVB_FE_NO_EXIT;
2990 fepriv->state = FESTATE_RETUNE;
2991 dvb_frontend_wakeup(fe);
2992
2993 return ret;
2994}
2995EXPORT_SYMBOL(dvb_frontend_resume);
2996
2997int dvb_register_frontend(struct dvb_adapter *dvb,
2998 struct dvb_frontend *fe)
2999{
3000 struct dvb_frontend_private *fepriv;
3001 const struct dvb_device dvbdev_template = {
3002 .users = ~0,
3003 .writers = 1,
3004 .readers = (~0) - 1,
3005 .fops = &dvb_frontend_fops,
3006#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
3007 .name = fe->ops.info.name,
3008#endif
3009 };
3010 int ret;
3011
3012 dev_dbg(dvb->device, "%s:\n", __func__);
3013
3014 if (mutex_lock_interruptible(&frontend_mutex))
3015 return -ERESTARTSYS;
3016
3017 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
3018 if (!fe->frontend_priv) {
3019 mutex_unlock(&frontend_mutex);
3020 return -ENOMEM;
3021 }
3022 fepriv = fe->frontend_priv;
3023
3024 kref_init(&fe->refcount);
3025
3026 /*
3027 * After initialization, there need to be two references: one
3028 * for dvb_unregister_frontend(), and another one for
3029 * dvb_frontend_detach().
3030 */
3031 dvb_frontend_get(fe);
3032
3033 sema_init(&fepriv->sem, 1);
3034 init_waitqueue_head(&fepriv->wait_queue);
3035 init_waitqueue_head(&fepriv->events.wait_queue);
3036 mutex_init(&fepriv->events.mtx);
3037 fe->dvb = dvb;
3038 fepriv->inversion = INVERSION_OFF;
3039
3040 dev_info(fe->dvb->device,
3041 "DVB: registering adapter %i frontend %i (%s)...\n",
3042 fe->dvb->num, fe->id, fe->ops.info.name);
3043
3044 ret = dvb_register_device(fe->dvb, &fepriv->dvbdev, &dvbdev_template,
3045 fe, DVB_DEVICE_FRONTEND, 0);
3046 if (ret) {
3047 dvb_frontend_put(fe);
3048 mutex_unlock(&frontend_mutex);
3049 return ret;
3050 }
3051
3052 /*
3053 * Initialize the cache to the proper values according with the
3054 * first supported delivery system (ops->delsys[0])
3055 */
3056
3057 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
3058 dvb_frontend_clear_cache(fe);
3059
3060 mutex_unlock(&frontend_mutex);
3061 return 0;
3062}
3063EXPORT_SYMBOL(dvb_register_frontend);
3064
3065int dvb_unregister_frontend(struct dvb_frontend *fe)
3066{
3067 struct dvb_frontend_private *fepriv = fe->frontend_priv;
3068
3069 dev_dbg(fe->dvb->device, "%s:\n", __func__);
3070
3071 mutex_lock(&frontend_mutex);
3072 dvb_frontend_stop(fe);
3073 dvb_remove_device(fepriv->dvbdev);
3074
3075 /* fe is invalid now */
3076 mutex_unlock(&frontend_mutex);
3077 dvb_frontend_put(fe);
3078 return 0;
3079}
3080EXPORT_SYMBOL(dvb_unregister_frontend);
3081
3082static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
3083 void (*release)(struct dvb_frontend *fe))
3084{
3085 if (release) {
3086 release(fe);
3087#ifdef CONFIG_MEDIA_ATTACH
3088 dvb_detach(release);
3089#endif
3090 }
3091}
3092
3093void dvb_frontend_detach(struct dvb_frontend *fe)
3094{
3095 dvb_frontend_invoke_release(fe, fe->ops.release_sec);
3096 dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
3097 dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
3098 dvb_frontend_put(fe);
3099}
3100EXPORT_SYMBOL(dvb_frontend_detach);
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/nospec.h>
27#include <linux/list.h>
28#include <linux/freezer.h>
29#include <linux/jiffies.h>
30#include <linux/kthread.h>
31#include <linux/ktime.h>
32#include <linux/compat.h>
33#include <asm/processor.h>
34
35#include <media/dvb_frontend.h>
36#include <media/dvbdev.h>
37#include <linux/dvb/version.h>
38
39static int dvb_frontend_debug;
40static int dvb_shutdown_timeout;
41static int dvb_force_auto_inversion;
42static int dvb_override_tune_delay;
43static int dvb_powerdown_on_sleep = 1;
44static int dvb_mfe_wait_time = 5;
45
46module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
47MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
48module_param(dvb_shutdown_timeout, int, 0644);
49MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
50module_param(dvb_force_auto_inversion, int, 0644);
51MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
52module_param(dvb_override_tune_delay, int, 0644);
53MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
54module_param(dvb_powerdown_on_sleep, int, 0644);
55MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
56module_param(dvb_mfe_wait_time, int, 0644);
57MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
58
59#define dprintk(fmt, arg...) \
60 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
61
62#define FESTATE_IDLE 1
63#define FESTATE_RETUNE 2
64#define FESTATE_TUNING_FAST 4
65#define FESTATE_TUNING_SLOW 8
66#define FESTATE_TUNED 16
67#define FESTATE_ZIGZAG_FAST 32
68#define FESTATE_ZIGZAG_SLOW 64
69#define FESTATE_DISEQC 128
70#define FESTATE_ERROR 256
71#define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
72#define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
73#define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
74#define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
75
76/*
77 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
78 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
79 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
80 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
81 * FESTATE_TUNED. The frontend has successfully locked on.
82 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
83 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
84 * FESTATE_DISEQC. A DISEQC command has just been issued.
85 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
86 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
87 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
88 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
89 */
90
91static DEFINE_MUTEX(frontend_mutex);
92
93struct dvb_frontend_private {
94 /* thread/frontend values */
95 struct dvb_device *dvbdev;
96 struct dvb_frontend_parameters parameters_out;
97 struct dvb_fe_events events;
98 struct semaphore sem;
99 struct list_head list_head;
100 wait_queue_head_t wait_queue;
101 struct task_struct *thread;
102 unsigned long release_jiffies;
103 unsigned int wakeup;
104 enum fe_status status;
105 unsigned long tune_mode_flags;
106 unsigned int delay;
107 unsigned int reinitialise;
108 int tone;
109 int voltage;
110
111 /* swzigzag values */
112 unsigned int state;
113 unsigned int bending;
114 int lnb_drift;
115 unsigned int inversion;
116 unsigned int auto_step;
117 unsigned int auto_sub_step;
118 unsigned int started_auto_step;
119 unsigned int min_delay;
120 unsigned int max_drift;
121 unsigned int step_size;
122 int quality;
123 unsigned int check_wrapped;
124 enum dvbfe_search algo_status;
125
126#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
127 struct media_pipeline pipe;
128#endif
129};
130
131static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
132 void (*release)(struct dvb_frontend *fe));
133
134static void __dvb_frontend_free(struct dvb_frontend *fe)
135{
136 struct dvb_frontend_private *fepriv = fe->frontend_priv;
137
138 if (fepriv)
139 dvb_device_put(fepriv->dvbdev);
140
141 dvb_frontend_invoke_release(fe, fe->ops.release);
142
143 kfree(fepriv);
144}
145
146static void dvb_frontend_free(struct kref *ref)
147{
148 struct dvb_frontend *fe =
149 container_of(ref, struct dvb_frontend, refcount);
150
151 __dvb_frontend_free(fe);
152}
153
154static void dvb_frontend_put(struct dvb_frontend *fe)
155{
156 /* call detach before dropping the reference count */
157 if (fe->ops.detach)
158 fe->ops.detach(fe);
159 /*
160 * Check if the frontend was registered, as otherwise
161 * kref was not initialized yet.
162 */
163 if (fe->frontend_priv)
164 kref_put(&fe->refcount, dvb_frontend_free);
165 else
166 __dvb_frontend_free(fe);
167}
168
169static void dvb_frontend_get(struct dvb_frontend *fe)
170{
171 kref_get(&fe->refcount);
172}
173
174static void dvb_frontend_wakeup(struct dvb_frontend *fe);
175static int dtv_get_frontend(struct dvb_frontend *fe,
176 struct dtv_frontend_properties *c,
177 struct dvb_frontend_parameters *p_out);
178static int
179dtv_property_legacy_params_sync(struct dvb_frontend *fe,
180 const struct dtv_frontend_properties *c,
181 struct dvb_frontend_parameters *p);
182
183static bool has_get_frontend(struct dvb_frontend *fe)
184{
185 return fe->ops.get_frontend;
186}
187
188/*
189 * Due to DVBv3 API calls, a delivery system should be mapped into one of
190 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
191 * otherwise, a DVBv3 call will fail.
192 */
193enum dvbv3_emulation_type {
194 DVBV3_UNKNOWN,
195 DVBV3_QPSK,
196 DVBV3_QAM,
197 DVBV3_OFDM,
198 DVBV3_ATSC,
199};
200
201static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
202{
203 switch (delivery_system) {
204 case SYS_DVBC_ANNEX_A:
205 case SYS_DVBC_ANNEX_C:
206 return DVBV3_QAM;
207 case SYS_DVBS:
208 case SYS_DVBS2:
209 case SYS_TURBO:
210 case SYS_ISDBS:
211 case SYS_DSS:
212 return DVBV3_QPSK;
213 case SYS_DVBT:
214 case SYS_DVBT2:
215 case SYS_ISDBT:
216 case SYS_DTMB:
217 return DVBV3_OFDM;
218 case SYS_ATSC:
219 case SYS_ATSCMH:
220 case SYS_DVBC_ANNEX_B:
221 return DVBV3_ATSC;
222 case SYS_UNDEFINED:
223 case SYS_ISDBC:
224 case SYS_DVBH:
225 case SYS_DAB:
226 default:
227 /*
228 * Doesn't know how to emulate those types and/or
229 * there's no frontend driver from this type yet
230 * with some emulation code, so, we're not sure yet how
231 * to handle them, or they're not compatible with a DVBv3 call.
232 */
233 return DVBV3_UNKNOWN;
234 }
235}
236
237static void dvb_frontend_add_event(struct dvb_frontend *fe,
238 enum fe_status status)
239{
240 struct dvb_frontend_private *fepriv = fe->frontend_priv;
241 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
242 struct dvb_fe_events *events = &fepriv->events;
243 struct dvb_frontend_event *e;
244 int wp;
245
246 dev_dbg(fe->dvb->device, "%s:\n", __func__);
247
248 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
249 dtv_get_frontend(fe, c, &fepriv->parameters_out);
250
251 mutex_lock(&events->mtx);
252
253 wp = (events->eventw + 1) % MAX_EVENT;
254 if (wp == events->eventr) {
255 events->overflow = 1;
256 events->eventr = (events->eventr + 1) % MAX_EVENT;
257 }
258
259 e = &events->events[events->eventw];
260 e->status = status;
261 e->parameters = fepriv->parameters_out;
262
263 events->eventw = wp;
264
265 mutex_unlock(&events->mtx);
266
267 wake_up_interruptible(&events->wait_queue);
268}
269
270static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv,
271 struct dvb_fe_events *events)
272{
273 int ret;
274
275 up(&fepriv->sem);
276 ret = events->eventw != events->eventr;
277 down(&fepriv->sem);
278
279 return ret;
280}
281
282static int dvb_frontend_get_event(struct dvb_frontend *fe,
283 struct dvb_frontend_event *event, int flags)
284{
285 struct dvb_frontend_private *fepriv = fe->frontend_priv;
286 struct dvb_fe_events *events = &fepriv->events;
287
288 dev_dbg(fe->dvb->device, "%s:\n", __func__);
289
290 if (events->overflow) {
291 events->overflow = 0;
292 return -EOVERFLOW;
293 }
294
295 if (events->eventw == events->eventr) {
296 struct wait_queue_entry wait;
297 int ret = 0;
298
299 if (flags & O_NONBLOCK)
300 return -EWOULDBLOCK;
301
302 init_waitqueue_entry(&wait, current);
303 add_wait_queue(&events->wait_queue, &wait);
304 while (!dvb_frontend_test_event(fepriv, events)) {
305 wait_woken(&wait, TASK_INTERRUPTIBLE, 0);
306 if (signal_pending(current)) {
307 ret = -ERESTARTSYS;
308 break;
309 }
310 }
311 remove_wait_queue(&events->wait_queue, &wait);
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
324static 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
334static 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
351void 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}
358EXPORT_SYMBOL(dvb_frontend_reinitialise);
359
360static 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 */
388static 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
486static 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 (fepriv->max_drift)
494 dev_warn_once(fe->dvb->device,
495 "Frontend requested software zigzag, but didn't set the frequency step size\n");
496
497 /* if we've got no parameters, just keep idling */
498 if (fepriv->state & FESTATE_IDLE) {
499 fepriv->delay = 3 * HZ;
500 fepriv->quality = 0;
501 return;
502 }
503
504 /* in SCAN mode, we just set the frontend when asked and leave it alone */
505 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
506 if (fepriv->state & FESTATE_RETUNE) {
507 tmp = *c;
508 if (fe->ops.set_frontend)
509 retval = fe->ops.set_frontend(fe);
510 *c = tmp;
511 if (retval < 0)
512 fepriv->state = FESTATE_ERROR;
513 else
514 fepriv->state = FESTATE_TUNED;
515 }
516 fepriv->delay = 3 * HZ;
517 fepriv->quality = 0;
518 return;
519 }
520
521 /* get the frontend status */
522 if (fepriv->state & FESTATE_RETUNE) {
523 s = 0;
524 } else {
525 if (fe->ops.read_status)
526 fe->ops.read_status(fe, &s);
527 if (s != fepriv->status) {
528 dvb_frontend_add_event(fe, s);
529 fepriv->status = s;
530 }
531 }
532
533 /* if we're not tuned, and we have a lock, move to the TUNED state */
534 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
535 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
536 fepriv->state = FESTATE_TUNED;
537
538 /* if we're tuned, then we have determined the correct inversion */
539 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
540 (c->inversion == INVERSION_AUTO)) {
541 c->inversion = fepriv->inversion;
542 }
543 return;
544 }
545
546 /* if we are tuned already, check we're still locked */
547 if (fepriv->state & FESTATE_TUNED) {
548 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
549
550 /* we're tuned, and the lock is still good... */
551 if (s & FE_HAS_LOCK) {
552 return;
553 } else { /* if we _WERE_ tuned, but now don't have a lock */
554 fepriv->state = FESTATE_ZIGZAG_FAST;
555 fepriv->started_auto_step = fepriv->auto_step;
556 fepriv->check_wrapped = 0;
557 }
558 }
559
560 /* don't actually do anything if we're in the LOSTLOCK state,
561 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
562 if ((fepriv->state & FESTATE_LOSTLOCK) &&
563 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
564 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
565 return;
566 }
567
568 /* don't do anything if we're in the DISEQC state, since this
569 * might be someone with a motorized dish controlled by DISEQC.
570 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
571 if (fepriv->state & FESTATE_DISEQC) {
572 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
573 return;
574 }
575
576 /* if we're in the RETUNE state, set everything up for a brand
577 * new scan, keeping the current inversion setting, as the next
578 * tune is _very_ likely to require the same */
579 if (fepriv->state & FESTATE_RETUNE) {
580 fepriv->lnb_drift = 0;
581 fepriv->auto_step = 0;
582 fepriv->auto_sub_step = 0;
583 fepriv->started_auto_step = 0;
584 fepriv->check_wrapped = 0;
585 }
586
587 /* fast zigzag. */
588 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
589 fepriv->delay = fepriv->min_delay;
590
591 /* perform a tune */
592 retval = dvb_frontend_swzigzag_autotune(fe,
593 fepriv->check_wrapped);
594 if (retval < 0) {
595 return;
596 } else if (retval) {
597 /* OK, if we've run out of trials at the fast speed.
598 * Drop back to slow for the _next_ attempt */
599 fepriv->state = FESTATE_SEARCHING_SLOW;
600 fepriv->started_auto_step = fepriv->auto_step;
601 return;
602 }
603 fepriv->check_wrapped = 1;
604
605 /* if we've just re-tuned, enter the ZIGZAG_FAST state.
606 * This ensures we cannot return from an
607 * FE_SET_FRONTEND ioctl before the first frontend tune
608 * occurs */
609 if (fepriv->state & FESTATE_RETUNE) {
610 fepriv->state = FESTATE_TUNING_FAST;
611 }
612 }
613
614 /* slow zigzag */
615 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
616 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
617
618 /* Note: don't bother checking for wrapping; we stay in this
619 * state until we get a lock */
620 dvb_frontend_swzigzag_autotune(fe, 0);
621 }
622}
623
624static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
625{
626 struct dvb_frontend_private *fepriv = fe->frontend_priv;
627
628 if (fe->exit != DVB_FE_NO_EXIT)
629 return 1;
630
631 if (fepriv->dvbdev->writers == 1)
632 if (time_after_eq(jiffies, fepriv->release_jiffies +
633 dvb_shutdown_timeout * HZ))
634 return 1;
635
636 return 0;
637}
638
639static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
640{
641 struct dvb_frontend_private *fepriv = fe->frontend_priv;
642
643 if (fepriv->wakeup) {
644 fepriv->wakeup = 0;
645 return 1;
646 }
647 return dvb_frontend_is_exiting(fe);
648}
649
650static void dvb_frontend_wakeup(struct dvb_frontend *fe)
651{
652 struct dvb_frontend_private *fepriv = fe->frontend_priv;
653
654 fepriv->wakeup = 1;
655 wake_up_interruptible(&fepriv->wait_queue);
656}
657
658static int dvb_frontend_thread(void *data)
659{
660 struct dvb_frontend *fe = data;
661 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
662 struct dvb_frontend_private *fepriv = fe->frontend_priv;
663 enum fe_status s = FE_NONE;
664 enum dvbfe_algo algo;
665 bool re_tune = false;
666 bool semheld = false;
667
668 dev_dbg(fe->dvb->device, "%s:\n", __func__);
669
670 fepriv->check_wrapped = 0;
671 fepriv->quality = 0;
672 fepriv->delay = 3 * HZ;
673 fepriv->status = 0;
674 fepriv->wakeup = 0;
675 fepriv->reinitialise = 0;
676
677 dvb_frontend_init(fe);
678
679 set_freezable();
680 while (1) {
681 up(&fepriv->sem); /* is locked when we enter the thread... */
682restart:
683 wait_event_interruptible_timeout(fepriv->wait_queue,
684 dvb_frontend_should_wakeup(fe) ||
685 kthread_should_stop() ||
686 freezing(current),
687 fepriv->delay);
688
689 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
690 /* got signal or quitting */
691 if (!down_interruptible(&fepriv->sem))
692 semheld = true;
693 fe->exit = DVB_FE_NORMAL_EXIT;
694 break;
695 }
696
697 if (try_to_freeze())
698 goto restart;
699
700 if (down_interruptible(&fepriv->sem))
701 break;
702
703 if (fepriv->reinitialise) {
704 dvb_frontend_init(fe);
705 if (fe->ops.set_tone && fepriv->tone != -1)
706 fe->ops.set_tone(fe, fepriv->tone);
707 if (fe->ops.set_voltage && fepriv->voltage != -1)
708 fe->ops.set_voltage(fe, fepriv->voltage);
709 fepriv->reinitialise = 0;
710 }
711
712 /* do an iteration of the tuning loop */
713 if (fe->ops.get_frontend_algo) {
714 algo = fe->ops.get_frontend_algo(fe);
715 switch (algo) {
716 case DVBFE_ALGO_HW:
717 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
718
719 if (fepriv->state & FESTATE_RETUNE) {
720 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
721 re_tune = true;
722 fepriv->state = FESTATE_TUNED;
723 } else {
724 re_tune = false;
725 }
726
727 if (fe->ops.tune)
728 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
729
730 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
731 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
732 dvb_frontend_add_event(fe, s);
733 fepriv->status = s;
734 }
735 break;
736 case DVBFE_ALGO_SW:
737 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
738 dvb_frontend_swzigzag(fe);
739 break;
740 case DVBFE_ALGO_CUSTOM:
741 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
742 if (fepriv->state & FESTATE_RETUNE) {
743 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
744 fepriv->state = FESTATE_TUNED;
745 }
746 /* Case where we are going to search for a carrier
747 * User asked us to retune again for some reason, possibly
748 * requesting a search with a new set of parameters
749 */
750 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
751 if (fe->ops.search) {
752 fepriv->algo_status = fe->ops.search(fe);
753 /* We did do a search as was requested, the flags are
754 * now unset as well and has the flags wrt to search.
755 */
756 } else {
757 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
758 }
759 }
760 /* Track the carrier if the search was successful */
761 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
762 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
763 fepriv->delay = HZ / 2;
764 }
765 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
766 fe->ops.read_status(fe, &s);
767 if (s != fepriv->status) {
768 dvb_frontend_add_event(fe, s); /* update event list */
769 fepriv->status = s;
770 if (!(s & FE_HAS_LOCK)) {
771 fepriv->delay = HZ / 10;
772 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
773 } else {
774 fepriv->delay = 60 * HZ;
775 }
776 }
777 break;
778 default:
779 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
780 break;
781 }
782 } else {
783 dvb_frontend_swzigzag(fe);
784 }
785 }
786
787 if (dvb_powerdown_on_sleep) {
788 if (fe->ops.set_voltage)
789 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
790 if (fe->ops.tuner_ops.sleep) {
791 if (fe->ops.i2c_gate_ctrl)
792 fe->ops.i2c_gate_ctrl(fe, 1);
793 fe->ops.tuner_ops.sleep(fe);
794 if (fe->ops.i2c_gate_ctrl)
795 fe->ops.i2c_gate_ctrl(fe, 0);
796 }
797 if (fe->ops.sleep)
798 fe->ops.sleep(fe);
799 }
800
801 fepriv->thread = NULL;
802 if (kthread_should_stop())
803 fe->exit = DVB_FE_DEVICE_REMOVED;
804 else
805 fe->exit = DVB_FE_NO_EXIT;
806 mb();
807
808 if (semheld)
809 up(&fepriv->sem);
810 dvb_frontend_wakeup(fe);
811 return 0;
812}
813
814static void dvb_frontend_stop(struct dvb_frontend *fe)
815{
816 struct dvb_frontend_private *fepriv = fe->frontend_priv;
817
818 dev_dbg(fe->dvb->device, "%s:\n", __func__);
819
820 if (fe->exit != DVB_FE_DEVICE_REMOVED)
821 fe->exit = DVB_FE_NORMAL_EXIT;
822 mb();
823
824 if (!fepriv->thread)
825 return;
826
827 kthread_stop(fepriv->thread);
828
829 sema_init(&fepriv->sem, 1);
830 fepriv->state = FESTATE_IDLE;
831
832 /* paranoia check in case a signal arrived */
833 if (fepriv->thread)
834 dev_warn(fe->dvb->device,
835 "dvb_frontend_stop: warning: thread %p won't exit\n",
836 fepriv->thread);
837}
838
839/*
840 * Sleep for the amount of time given by add_usec parameter
841 *
842 * This needs to be as precise as possible, as it affects the detection of
843 * the dish tone command at the satellite subsystem. The precision is improved
844 * by using a scheduled msleep followed by udelay for the remainder.
845 */
846void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
847{
848 s32 delta;
849
850 *waketime = ktime_add_us(*waketime, add_usec);
851 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
852 if (delta > 2500) {
853 msleep((delta - 1500) / 1000);
854 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
855 }
856 if (delta > 0)
857 udelay(delta);
858}
859EXPORT_SYMBOL(dvb_frontend_sleep_until);
860
861static int dvb_frontend_start(struct dvb_frontend *fe)
862{
863 int ret;
864 struct dvb_frontend_private *fepriv = fe->frontend_priv;
865 struct task_struct *fe_thread;
866
867 dev_dbg(fe->dvb->device, "%s:\n", __func__);
868
869 if (fepriv->thread) {
870 if (fe->exit == DVB_FE_NO_EXIT)
871 return 0;
872 else
873 dvb_frontend_stop(fe);
874 }
875
876 if (signal_pending(current))
877 return -EINTR;
878 if (down_interruptible(&fepriv->sem))
879 return -EINTR;
880
881 fepriv->state = FESTATE_IDLE;
882 fe->exit = DVB_FE_NO_EXIT;
883 fepriv->thread = NULL;
884 mb();
885
886 fe_thread = kthread_run(dvb_frontend_thread, fe,
887 "kdvb-ad-%i-fe-%i", fe->dvb->num, fe->id);
888 if (IS_ERR(fe_thread)) {
889 ret = PTR_ERR(fe_thread);
890 dev_warn(fe->dvb->device,
891 "dvb_frontend_start: failed to start kthread (%d)\n",
892 ret);
893 up(&fepriv->sem);
894 return ret;
895 }
896 fepriv->thread = fe_thread;
897 return 0;
898}
899
900static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
901 u32 *freq_min, u32 *freq_max,
902 u32 *tolerance)
903{
904 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
905 u32 tuner_min = fe->ops.tuner_ops.info.frequency_min_hz;
906 u32 tuner_max = fe->ops.tuner_ops.info.frequency_max_hz;
907 u32 frontend_min = fe->ops.info.frequency_min_hz;
908 u32 frontend_max = fe->ops.info.frequency_max_hz;
909
910 *freq_min = max(frontend_min, tuner_min);
911
912 if (frontend_max == 0)
913 *freq_max = tuner_max;
914 else if (tuner_max == 0)
915 *freq_max = frontend_max;
916 else
917 *freq_max = min(frontend_max, tuner_max);
918
919 if (*freq_min == 0 || *freq_max == 0)
920 dev_warn(fe->dvb->device,
921 "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
922 fe->dvb->num, fe->id);
923
924 dev_dbg(fe->dvb->device, "frequency interval: tuner: %u...%u, frontend: %u...%u",
925 tuner_min, tuner_max, frontend_min, frontend_max);
926
927 /* If the standard is for satellite, convert frequencies to kHz */
928 switch (c->delivery_system) {
929 case SYS_DSS:
930 case SYS_DVBS:
931 case SYS_DVBS2:
932 case SYS_TURBO:
933 case SYS_ISDBS:
934 *freq_min /= kHz;
935 *freq_max /= kHz;
936 if (tolerance)
937 *tolerance = fe->ops.info.frequency_tolerance_hz / kHz;
938
939 break;
940 default:
941 if (tolerance)
942 *tolerance = fe->ops.info.frequency_tolerance_hz;
943 break;
944 }
945}
946
947static u32 dvb_frontend_get_stepsize(struct dvb_frontend *fe)
948{
949 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
950 u32 fe_step = fe->ops.info.frequency_stepsize_hz;
951 u32 tuner_step = fe->ops.tuner_ops.info.frequency_step_hz;
952 u32 step = max(fe_step, tuner_step);
953
954 switch (c->delivery_system) {
955 case SYS_DSS:
956 case SYS_DVBS:
957 case SYS_DVBS2:
958 case SYS_TURBO:
959 case SYS_ISDBS:
960 step /= kHz;
961 break;
962 default:
963 break;
964 }
965
966 return step;
967}
968
969static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
970{
971 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
972 u32 freq_min;
973 u32 freq_max;
974
975 /* range check: frequency */
976 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max, NULL);
977 if ((freq_min && c->frequency < freq_min) ||
978 (freq_max && c->frequency > freq_max)) {
979 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
980 fe->dvb->num, fe->id, c->frequency,
981 freq_min, freq_max);
982 return -EINVAL;
983 }
984
985 /* range check: symbol rate */
986 switch (c->delivery_system) {
987 case SYS_DSS:
988 case SYS_DVBS:
989 case SYS_DVBS2:
990 case SYS_TURBO:
991 case SYS_DVBC_ANNEX_A:
992 case SYS_DVBC_ANNEX_C:
993 if ((fe->ops.info.symbol_rate_min &&
994 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
995 (fe->ops.info.symbol_rate_max &&
996 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
997 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
998 fe->dvb->num, fe->id, c->symbol_rate,
999 fe->ops.info.symbol_rate_min,
1000 fe->ops.info.symbol_rate_max);
1001 return -EINVAL;
1002 }
1003 break;
1004 default:
1005 break;
1006 }
1007
1008 return 0;
1009}
1010
1011static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
1012{
1013 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1014 int i;
1015 u32 delsys;
1016
1017 delsys = c->delivery_system;
1018 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
1019 c->delivery_system = delsys;
1020
1021 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
1022 __func__, c->delivery_system);
1023
1024 c->transmission_mode = TRANSMISSION_MODE_AUTO;
1025 c->bandwidth_hz = 0; /* AUTO */
1026 c->guard_interval = GUARD_INTERVAL_AUTO;
1027 c->hierarchy = HIERARCHY_AUTO;
1028 c->symbol_rate = 0;
1029 c->code_rate_HP = FEC_AUTO;
1030 c->code_rate_LP = FEC_AUTO;
1031 c->fec_inner = FEC_AUTO;
1032 c->rolloff = ROLLOFF_AUTO;
1033 c->voltage = SEC_VOLTAGE_OFF;
1034 c->sectone = SEC_TONE_OFF;
1035 c->pilot = PILOT_AUTO;
1036
1037 c->isdbt_partial_reception = 0;
1038 c->isdbt_sb_mode = 0;
1039 c->isdbt_sb_subchannel = 0;
1040 c->isdbt_sb_segment_idx = 0;
1041 c->isdbt_sb_segment_count = 0;
1042 c->isdbt_layer_enabled = 7; /* All layers (A,B,C) */
1043 for (i = 0; i < 3; i++) {
1044 c->layer[i].fec = FEC_AUTO;
1045 c->layer[i].modulation = QAM_AUTO;
1046 c->layer[i].interleaving = 0;
1047 c->layer[i].segment_count = 0;
1048 }
1049
1050 c->stream_id = NO_STREAM_ID_FILTER;
1051 c->scrambling_sequence_index = 0;/* default sequence */
1052
1053 switch (c->delivery_system) {
1054 case SYS_DSS:
1055 c->modulation = QPSK;
1056 c->rolloff = ROLLOFF_20;
1057 break;
1058 case SYS_DVBS:
1059 case SYS_DVBS2:
1060 case SYS_TURBO:
1061 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1062 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1063 break;
1064 case SYS_ATSC:
1065 c->modulation = VSB_8;
1066 break;
1067 case SYS_ISDBS:
1068 c->symbol_rate = 28860000;
1069 c->rolloff = ROLLOFF_35;
1070 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1071 break;
1072 default:
1073 c->modulation = QAM_AUTO;
1074 break;
1075 }
1076
1077 c->lna = LNA_AUTO;
1078
1079 return 0;
1080}
1081
1082#define _DTV_CMD(n) \
1083 [n] = #n
1084
1085static char *dtv_cmds[DTV_MAX_COMMAND + 1] = {
1086 _DTV_CMD(DTV_TUNE),
1087 _DTV_CMD(DTV_CLEAR),
1088
1089 /* Set */
1090 _DTV_CMD(DTV_FREQUENCY),
1091 _DTV_CMD(DTV_BANDWIDTH_HZ),
1092 _DTV_CMD(DTV_MODULATION),
1093 _DTV_CMD(DTV_INVERSION),
1094 _DTV_CMD(DTV_DISEQC_MASTER),
1095 _DTV_CMD(DTV_SYMBOL_RATE),
1096 _DTV_CMD(DTV_INNER_FEC),
1097 _DTV_CMD(DTV_VOLTAGE),
1098 _DTV_CMD(DTV_TONE),
1099 _DTV_CMD(DTV_PILOT),
1100 _DTV_CMD(DTV_ROLLOFF),
1101 _DTV_CMD(DTV_DELIVERY_SYSTEM),
1102 _DTV_CMD(DTV_HIERARCHY),
1103 _DTV_CMD(DTV_CODE_RATE_HP),
1104 _DTV_CMD(DTV_CODE_RATE_LP),
1105 _DTV_CMD(DTV_GUARD_INTERVAL),
1106 _DTV_CMD(DTV_TRANSMISSION_MODE),
1107 _DTV_CMD(DTV_INTERLEAVING),
1108
1109 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION),
1110 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING),
1111 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID),
1112 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX),
1113 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT),
1114 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED),
1115 _DTV_CMD(DTV_ISDBT_LAYERA_FEC),
1116 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION),
1117 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT),
1118 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING),
1119 _DTV_CMD(DTV_ISDBT_LAYERB_FEC),
1120 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION),
1121 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT),
1122 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING),
1123 _DTV_CMD(DTV_ISDBT_LAYERC_FEC),
1124 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION),
1125 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT),
1126 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING),
1127
1128 _DTV_CMD(DTV_STREAM_ID),
1129 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY),
1130 _DTV_CMD(DTV_SCRAMBLING_SEQUENCE_INDEX),
1131 _DTV_CMD(DTV_LNA),
1132
1133 /* Get */
1134 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY),
1135 _DTV_CMD(DTV_API_VERSION),
1136
1137 _DTV_CMD(DTV_ENUM_DELSYS),
1138
1139 _DTV_CMD(DTV_ATSCMH_PARADE_ID),
1140 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE),
1141
1142 _DTV_CMD(DTV_ATSCMH_FIC_VER),
1143 _DTV_CMD(DTV_ATSCMH_NOG),
1144 _DTV_CMD(DTV_ATSCMH_TNOG),
1145 _DTV_CMD(DTV_ATSCMH_SGN),
1146 _DTV_CMD(DTV_ATSCMH_PRC),
1147 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE),
1148 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI),
1149 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC),
1150 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE),
1151 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A),
1152 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B),
1153 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C),
1154 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D),
1155
1156 /* Statistics API */
1157 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH),
1158 _DTV_CMD(DTV_STAT_CNR),
1159 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT),
1160 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT),
1161 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT),
1162 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT),
1163 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT),
1164 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT),
1165};
1166
1167static char *dtv_cmd_name(u32 cmd)
1168{
1169 cmd = array_index_nospec(cmd, DTV_MAX_COMMAND);
1170 return dtv_cmds[cmd];
1171}
1172
1173/* Synchronise the legacy tuning parameters into the cache, so that demodulator
1174 * drivers can use a single set_frontend tuning function, regardless of whether
1175 * it's being used for the legacy or new API, reducing code and complexity.
1176 */
1177static int dtv_property_cache_sync(struct dvb_frontend *fe,
1178 struct dtv_frontend_properties *c,
1179 const struct dvb_frontend_parameters *p)
1180{
1181 c->frequency = p->frequency;
1182 c->inversion = p->inversion;
1183
1184 switch (dvbv3_type(c->delivery_system)) {
1185 case DVBV3_QPSK:
1186 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1187 c->symbol_rate = p->u.qpsk.symbol_rate;
1188 c->fec_inner = p->u.qpsk.fec_inner;
1189 break;
1190 case DVBV3_QAM:
1191 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1192 c->symbol_rate = p->u.qam.symbol_rate;
1193 c->fec_inner = p->u.qam.fec_inner;
1194 c->modulation = p->u.qam.modulation;
1195 break;
1196 case DVBV3_OFDM:
1197 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1198
1199 switch (p->u.ofdm.bandwidth) {
1200 case BANDWIDTH_10_MHZ:
1201 c->bandwidth_hz = 10000000;
1202 break;
1203 case BANDWIDTH_8_MHZ:
1204 c->bandwidth_hz = 8000000;
1205 break;
1206 case BANDWIDTH_7_MHZ:
1207 c->bandwidth_hz = 7000000;
1208 break;
1209 case BANDWIDTH_6_MHZ:
1210 c->bandwidth_hz = 6000000;
1211 break;
1212 case BANDWIDTH_5_MHZ:
1213 c->bandwidth_hz = 5000000;
1214 break;
1215 case BANDWIDTH_1_712_MHZ:
1216 c->bandwidth_hz = 1712000;
1217 break;
1218 case BANDWIDTH_AUTO:
1219 c->bandwidth_hz = 0;
1220 }
1221
1222 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1223 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1224 c->modulation = p->u.ofdm.constellation;
1225 c->transmission_mode = p->u.ofdm.transmission_mode;
1226 c->guard_interval = p->u.ofdm.guard_interval;
1227 c->hierarchy = p->u.ofdm.hierarchy_information;
1228 break;
1229 case DVBV3_ATSC:
1230 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1231 c->modulation = p->u.vsb.modulation;
1232 if (c->delivery_system == SYS_ATSCMH)
1233 break;
1234 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1235 c->delivery_system = SYS_ATSC;
1236 else
1237 c->delivery_system = SYS_DVBC_ANNEX_B;
1238 break;
1239 case DVBV3_UNKNOWN:
1240 dev_err(fe->dvb->device,
1241 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1242 __func__, c->delivery_system);
1243 return -EINVAL;
1244 }
1245
1246 return 0;
1247}
1248
1249/* Ensure the cached values are set correctly in the frontend
1250 * legacy tuning structures, for the advanced tuning API.
1251 */
1252static int
1253dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1254 const struct dtv_frontend_properties *c,
1255 struct dvb_frontend_parameters *p)
1256{
1257 p->frequency = c->frequency;
1258 p->inversion = c->inversion;
1259
1260 switch (dvbv3_type(c->delivery_system)) {
1261 case DVBV3_UNKNOWN:
1262 dev_err(fe->dvb->device,
1263 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1264 __func__, c->delivery_system);
1265 return -EINVAL;
1266 case DVBV3_QPSK:
1267 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1268 p->u.qpsk.symbol_rate = c->symbol_rate;
1269 p->u.qpsk.fec_inner = c->fec_inner;
1270 break;
1271 case DVBV3_QAM:
1272 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1273 p->u.qam.symbol_rate = c->symbol_rate;
1274 p->u.qam.fec_inner = c->fec_inner;
1275 p->u.qam.modulation = c->modulation;
1276 break;
1277 case DVBV3_OFDM:
1278 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1279 switch (c->bandwidth_hz) {
1280 case 10000000:
1281 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1282 break;
1283 case 8000000:
1284 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1285 break;
1286 case 7000000:
1287 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1288 break;
1289 case 6000000:
1290 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1291 break;
1292 case 5000000:
1293 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1294 break;
1295 case 1712000:
1296 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1297 break;
1298 case 0:
1299 default:
1300 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1301 }
1302 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1303 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1304 p->u.ofdm.constellation = c->modulation;
1305 p->u.ofdm.transmission_mode = c->transmission_mode;
1306 p->u.ofdm.guard_interval = c->guard_interval;
1307 p->u.ofdm.hierarchy_information = c->hierarchy;
1308 break;
1309 case DVBV3_ATSC:
1310 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1311 p->u.vsb.modulation = c->modulation;
1312 break;
1313 }
1314 return 0;
1315}
1316
1317/**
1318 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1319 * @fe: struct dvb_frontend pointer
1320 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1321 * @p_out: struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1322 *
1323 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1324 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1325 * If p_out is not null, it will update the DVBv3 params pointed by it.
1326 */
1327static int dtv_get_frontend(struct dvb_frontend *fe,
1328 struct dtv_frontend_properties *c,
1329 struct dvb_frontend_parameters *p_out)
1330{
1331 int r;
1332
1333 if (fe->ops.get_frontend) {
1334 r = fe->ops.get_frontend(fe, c);
1335 if (unlikely(r < 0))
1336 return r;
1337 if (p_out)
1338 dtv_property_legacy_params_sync(fe, c, p_out);
1339 return 0;
1340 }
1341
1342 /* As everything is in cache, get_frontend fops are always supported */
1343 return 0;
1344}
1345
1346static int dvb_frontend_handle_ioctl(struct file *file,
1347 unsigned int cmd, void *parg);
1348
1349static int dtv_property_process_get(struct dvb_frontend *fe,
1350 const struct dtv_frontend_properties *c,
1351 struct dtv_property *tvp,
1352 struct file *file)
1353{
1354 int ncaps;
1355 unsigned int len = 1;
1356
1357 switch (tvp->cmd) {
1358 case DTV_ENUM_DELSYS:
1359 ncaps = 0;
1360 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1361 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1362 ncaps++;
1363 }
1364 tvp->u.buffer.len = ncaps;
1365 len = ncaps;
1366 break;
1367 case DTV_FREQUENCY:
1368 tvp->u.data = c->frequency;
1369 break;
1370 case DTV_MODULATION:
1371 tvp->u.data = c->modulation;
1372 break;
1373 case DTV_BANDWIDTH_HZ:
1374 tvp->u.data = c->bandwidth_hz;
1375 break;
1376 case DTV_INVERSION:
1377 tvp->u.data = c->inversion;
1378 break;
1379 case DTV_SYMBOL_RATE:
1380 tvp->u.data = c->symbol_rate;
1381 break;
1382 case DTV_INNER_FEC:
1383 tvp->u.data = c->fec_inner;
1384 break;
1385 case DTV_PILOT:
1386 tvp->u.data = c->pilot;
1387 break;
1388 case DTV_ROLLOFF:
1389 tvp->u.data = c->rolloff;
1390 break;
1391 case DTV_DELIVERY_SYSTEM:
1392 tvp->u.data = c->delivery_system;
1393 break;
1394 case DTV_VOLTAGE:
1395 tvp->u.data = c->voltage;
1396 break;
1397 case DTV_TONE:
1398 tvp->u.data = c->sectone;
1399 break;
1400 case DTV_API_VERSION:
1401 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1402 break;
1403 case DTV_CODE_RATE_HP:
1404 tvp->u.data = c->code_rate_HP;
1405 break;
1406 case DTV_CODE_RATE_LP:
1407 tvp->u.data = c->code_rate_LP;
1408 break;
1409 case DTV_GUARD_INTERVAL:
1410 tvp->u.data = c->guard_interval;
1411 break;
1412 case DTV_TRANSMISSION_MODE:
1413 tvp->u.data = c->transmission_mode;
1414 break;
1415 case DTV_HIERARCHY:
1416 tvp->u.data = c->hierarchy;
1417 break;
1418 case DTV_INTERLEAVING:
1419 tvp->u.data = c->interleaving;
1420 break;
1421
1422 /* ISDB-T Support here */
1423 case DTV_ISDBT_PARTIAL_RECEPTION:
1424 tvp->u.data = c->isdbt_partial_reception;
1425 break;
1426 case DTV_ISDBT_SOUND_BROADCASTING:
1427 tvp->u.data = c->isdbt_sb_mode;
1428 break;
1429 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1430 tvp->u.data = c->isdbt_sb_subchannel;
1431 break;
1432 case DTV_ISDBT_SB_SEGMENT_IDX:
1433 tvp->u.data = c->isdbt_sb_segment_idx;
1434 break;
1435 case DTV_ISDBT_SB_SEGMENT_COUNT:
1436 tvp->u.data = c->isdbt_sb_segment_count;
1437 break;
1438 case DTV_ISDBT_LAYER_ENABLED:
1439 tvp->u.data = c->isdbt_layer_enabled;
1440 break;
1441 case DTV_ISDBT_LAYERA_FEC:
1442 tvp->u.data = c->layer[0].fec;
1443 break;
1444 case DTV_ISDBT_LAYERA_MODULATION:
1445 tvp->u.data = c->layer[0].modulation;
1446 break;
1447 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1448 tvp->u.data = c->layer[0].segment_count;
1449 break;
1450 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1451 tvp->u.data = c->layer[0].interleaving;
1452 break;
1453 case DTV_ISDBT_LAYERB_FEC:
1454 tvp->u.data = c->layer[1].fec;
1455 break;
1456 case DTV_ISDBT_LAYERB_MODULATION:
1457 tvp->u.data = c->layer[1].modulation;
1458 break;
1459 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1460 tvp->u.data = c->layer[1].segment_count;
1461 break;
1462 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1463 tvp->u.data = c->layer[1].interleaving;
1464 break;
1465 case DTV_ISDBT_LAYERC_FEC:
1466 tvp->u.data = c->layer[2].fec;
1467 break;
1468 case DTV_ISDBT_LAYERC_MODULATION:
1469 tvp->u.data = c->layer[2].modulation;
1470 break;
1471 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1472 tvp->u.data = c->layer[2].segment_count;
1473 break;
1474 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1475 tvp->u.data = c->layer[2].interleaving;
1476 break;
1477
1478 /* Multistream support */
1479 case DTV_STREAM_ID:
1480 case DTV_DVBT2_PLP_ID_LEGACY:
1481 tvp->u.data = c->stream_id;
1482 break;
1483
1484 /* Physical layer scrambling support */
1485 case DTV_SCRAMBLING_SEQUENCE_INDEX:
1486 tvp->u.data = c->scrambling_sequence_index;
1487 break;
1488
1489 /* ATSC-MH */
1490 case DTV_ATSCMH_FIC_VER:
1491 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1492 break;
1493 case DTV_ATSCMH_PARADE_ID:
1494 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1495 break;
1496 case DTV_ATSCMH_NOG:
1497 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1498 break;
1499 case DTV_ATSCMH_TNOG:
1500 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1501 break;
1502 case DTV_ATSCMH_SGN:
1503 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1504 break;
1505 case DTV_ATSCMH_PRC:
1506 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1507 break;
1508 case DTV_ATSCMH_RS_FRAME_MODE:
1509 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1510 break;
1511 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1512 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1513 break;
1514 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1515 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1516 break;
1517 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1518 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1519 break;
1520 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1521 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1522 break;
1523 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1524 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1525 break;
1526 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1527 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1528 break;
1529 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1530 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1531 break;
1532 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1533 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1534 break;
1535
1536 case DTV_LNA:
1537 tvp->u.data = c->lna;
1538 break;
1539
1540 /* Fill quality measures */
1541 case DTV_STAT_SIGNAL_STRENGTH:
1542 tvp->u.st = c->strength;
1543 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1544 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1545 len = tvp->u.buffer.len;
1546 break;
1547 case DTV_STAT_CNR:
1548 tvp->u.st = c->cnr;
1549 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1550 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1551 len = tvp->u.buffer.len;
1552 break;
1553 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1554 tvp->u.st = c->pre_bit_error;
1555 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1556 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1557 len = tvp->u.buffer.len;
1558 break;
1559 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1560 tvp->u.st = c->pre_bit_count;
1561 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1562 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1563 len = tvp->u.buffer.len;
1564 break;
1565 case DTV_STAT_POST_ERROR_BIT_COUNT:
1566 tvp->u.st = c->post_bit_error;
1567 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1568 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1569 len = tvp->u.buffer.len;
1570 break;
1571 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1572 tvp->u.st = c->post_bit_count;
1573 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1574 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1575 len = tvp->u.buffer.len;
1576 break;
1577 case DTV_STAT_ERROR_BLOCK_COUNT:
1578 tvp->u.st = c->block_error;
1579 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1580 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1581 len = tvp->u.buffer.len;
1582 break;
1583 case DTV_STAT_TOTAL_BLOCK_COUNT:
1584 tvp->u.st = c->block_count;
1585 if (tvp->u.buffer.len > MAX_DTV_STATS * sizeof(u32))
1586 tvp->u.buffer.len = MAX_DTV_STATS * sizeof(u32);
1587 len = tvp->u.buffer.len;
1588 break;
1589 default:
1590 dev_dbg(fe->dvb->device,
1591 "%s: FE property %d doesn't exist\n",
1592 __func__, tvp->cmd);
1593 return -EINVAL;
1594 }
1595
1596 if (len < 1)
1597 len = 1;
1598
1599 dev_dbg(fe->dvb->device,
1600 "%s: GET cmd 0x%08x (%s) len %d: %*ph\n",
1601 __func__, tvp->cmd, dtv_cmd_name(tvp->cmd),
1602 tvp->u.buffer.len, tvp->u.buffer.len, tvp->u.buffer.data);
1603
1604 return 0;
1605}
1606
1607static int dtv_set_frontend(struct dvb_frontend *fe);
1608
1609static bool is_dvbv3_delsys(u32 delsys)
1610{
1611 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1612 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1613}
1614
1615/**
1616 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1617 * @fe: struct frontend;
1618 * @delsys: DVBv5 type that will be used for emulation
1619 *
1620 * Provides emulation for delivery systems that are compatible with the old
1621 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1622 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontend
1623 * parameters are compatible with DVB-S spec.
1624 */
1625static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1626{
1627 int i;
1628 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1629
1630 c->delivery_system = delsys;
1631
1632 /*
1633 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1634 */
1635 if (c->delivery_system == SYS_ISDBT) {
1636 dev_dbg(fe->dvb->device,
1637 "%s: Using defaults for SYS_ISDBT\n",
1638 __func__);
1639
1640 if (!c->bandwidth_hz)
1641 c->bandwidth_hz = 6000000;
1642
1643 c->isdbt_partial_reception = 0;
1644 c->isdbt_sb_mode = 0;
1645 c->isdbt_sb_subchannel = 0;
1646 c->isdbt_sb_segment_idx = 0;
1647 c->isdbt_sb_segment_count = 0;
1648 c->isdbt_layer_enabled = 7;
1649 for (i = 0; i < 3; i++) {
1650 c->layer[i].fec = FEC_AUTO;
1651 c->layer[i].modulation = QAM_AUTO;
1652 c->layer[i].interleaving = 0;
1653 c->layer[i].segment_count = 0;
1654 }
1655 }
1656 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1657 __func__, c->delivery_system);
1658
1659 return 0;
1660}
1661
1662/**
1663 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1664 * @fe: frontend struct
1665 * @desired_system: delivery system requested by the user
1666 *
1667 * A DVBv5 call know what's the desired system it wants. So, set it.
1668 *
1669 * There are, however, a few known issues with early DVBv5 applications that
1670 * are also handled by this logic:
1671 *
1672 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1673 * This is an API violation, but, as we don't want to break userspace,
1674 * convert it to the first supported delivery system.
1675 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1676 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1677 * ISDB-T provided backward compat with DVB-T.
1678 */
1679static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1680 u32 desired_system)
1681{
1682 int ncaps;
1683 u32 delsys = SYS_UNDEFINED;
1684 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1685 enum dvbv3_emulation_type type;
1686
1687 /*
1688 * It was reported that some old DVBv5 applications were
1689 * filling delivery_system with SYS_UNDEFINED. If this happens,
1690 * assume that the application wants to use the first supported
1691 * delivery system.
1692 */
1693 if (desired_system == SYS_UNDEFINED)
1694 desired_system = fe->ops.delsys[0];
1695
1696 /*
1697 * This is a DVBv5 call. So, it likely knows the supported
1698 * delivery systems. So, check if the desired delivery system is
1699 * supported
1700 */
1701 ncaps = 0;
1702 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1703 if (fe->ops.delsys[ncaps] == desired_system) {
1704 c->delivery_system = desired_system;
1705 dev_dbg(fe->dvb->device,
1706 "%s: Changing delivery system to %d\n",
1707 __func__, desired_system);
1708 return 0;
1709 }
1710 ncaps++;
1711 }
1712
1713 /*
1714 * The requested delivery system isn't supported. Maybe userspace
1715 * is requesting a DVBv3 compatible delivery system.
1716 *
1717 * The emulation only works if the desired system is one of the
1718 * delivery systems supported by DVBv3 API
1719 */
1720 if (!is_dvbv3_delsys(desired_system)) {
1721 dev_dbg(fe->dvb->device,
1722 "%s: Delivery system %d not supported.\n",
1723 __func__, desired_system);
1724 return -EINVAL;
1725 }
1726
1727 type = dvbv3_type(desired_system);
1728
1729 /*
1730 * Get the last non-DVBv3 delivery system that has the same type
1731 * of the desired system
1732 */
1733 ncaps = 0;
1734 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1735 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1736 delsys = fe->ops.delsys[ncaps];
1737 ncaps++;
1738 }
1739
1740 /* There's nothing compatible with the desired delivery system */
1741 if (delsys == SYS_UNDEFINED) {
1742 dev_dbg(fe->dvb->device,
1743 "%s: Delivery system %d not supported on emulation mode.\n",
1744 __func__, desired_system);
1745 return -EINVAL;
1746 }
1747
1748 dev_dbg(fe->dvb->device,
1749 "%s: Using delivery system %d emulated as if it were %d\n",
1750 __func__, delsys, desired_system);
1751
1752 return emulate_delivery_system(fe, desired_system);
1753}
1754
1755/**
1756 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1757 * @fe: frontend struct
1758 *
1759 * A DVBv3 call doesn't know what's the desired system it wants. It also
1760 * doesn't allow to switch between different types. Due to that, userspace
1761 * should use DVBv5 instead.
1762 * However, in order to avoid breaking userspace API, limited backward
1763 * compatibility support is provided.
1764 *
1765 * There are some delivery systems that are incompatible with DVBv3 calls.
1766 *
1767 * This routine should work fine for frontends that support just one delivery
1768 * system.
1769 *
1770 * For frontends that support multiple frontends:
1771 * 1) It defaults to use the first supported delivery system. There's an
1772 * userspace application that allows changing it at runtime;
1773 *
1774 * 2) If the current delivery system is not compatible with DVBv3, it gets
1775 * the first one that it is compatible.
1776 *
1777 * NOTE: in order for this to work with applications like Kaffeine that
1778 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1779 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1780 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1781 * to DVB-S.
1782 */
1783static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1784{
1785 int ncaps;
1786 u32 delsys = SYS_UNDEFINED;
1787 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1788
1789 /* If not set yet, defaults to the first supported delivery system */
1790 if (c->delivery_system == SYS_UNDEFINED)
1791 c->delivery_system = fe->ops.delsys[0];
1792
1793 /*
1794 * Trivial case: just use the current one, if it already a DVBv3
1795 * delivery system
1796 */
1797 if (is_dvbv3_delsys(c->delivery_system)) {
1798 dev_dbg(fe->dvb->device,
1799 "%s: Using delivery system to %d\n",
1800 __func__, c->delivery_system);
1801 return 0;
1802 }
1803
1804 /*
1805 * Seek for the first delivery system that it is compatible with a
1806 * DVBv3 standard
1807 */
1808 ncaps = 0;
1809 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1810 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1811 delsys = fe->ops.delsys[ncaps];
1812 break;
1813 }
1814 ncaps++;
1815 }
1816 if (delsys == SYS_UNDEFINED) {
1817 dev_dbg(fe->dvb->device,
1818 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1819 __func__);
1820 return -EINVAL;
1821 }
1822 return emulate_delivery_system(fe, delsys);
1823}
1824
1825static void prepare_tuning_algo_parameters(struct dvb_frontend *fe)
1826{
1827 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1828 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1829 struct dvb_frontend_tune_settings fetunesettings = { 0 };
1830
1831 /* get frontend-specific tuning settings */
1832 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1833 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1834 fepriv->max_drift = fetunesettings.max_drift;
1835 fepriv->step_size = fetunesettings.step_size;
1836 } else {
1837 /* default values */
1838 switch (c->delivery_system) {
1839 case SYS_DSS:
1840 case SYS_DVBS:
1841 case SYS_DVBS2:
1842 case SYS_ISDBS:
1843 case SYS_TURBO:
1844 case SYS_DVBC_ANNEX_A:
1845 case SYS_DVBC_ANNEX_C:
1846 fepriv->min_delay = HZ / 20;
1847 fepriv->step_size = c->symbol_rate / 16000;
1848 fepriv->max_drift = c->symbol_rate / 2000;
1849 break;
1850 case SYS_DVBT:
1851 case SYS_DVBT2:
1852 case SYS_ISDBT:
1853 case SYS_DTMB:
1854 fepriv->min_delay = HZ / 20;
1855 fepriv->step_size = dvb_frontend_get_stepsize(fe) * 2;
1856 fepriv->max_drift = fepriv->step_size + 1;
1857 break;
1858 default:
1859 /*
1860 * FIXME: This sounds wrong! if freqency_stepsize is
1861 * defined by the frontend, why not use it???
1862 */
1863 fepriv->min_delay = HZ / 20;
1864 fepriv->step_size = 0; /* no zigzag */
1865 fepriv->max_drift = 0;
1866 break;
1867 }
1868 }
1869 if (dvb_override_tune_delay > 0)
1870 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1871}
1872
1873/**
1874 * dtv_property_process_set - Sets a single DTV property
1875 * @fe: Pointer to &struct dvb_frontend
1876 * @file: Pointer to &struct file
1877 * @cmd: Digital TV command
1878 * @data: An unsigned 32-bits number
1879 *
1880 * This routine assigns the property
1881 * value to the corresponding member of
1882 * &struct dtv_frontend_properties
1883 *
1884 * Returns:
1885 * Zero on success, negative errno on failure.
1886 */
1887static int dtv_property_process_set(struct dvb_frontend *fe,
1888 struct file *file,
1889 u32 cmd, u32 data)
1890{
1891 int r = 0;
1892 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1893
1894 /** Dump DTV command name and value*/
1895 if (!cmd || cmd > DTV_MAX_COMMAND)
1896 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n",
1897 __func__, cmd);
1898 else
1899 dev_dbg(fe->dvb->device,
1900 "%s: SET cmd 0x%08x (%s) to 0x%08x\n",
1901 __func__, cmd, dtv_cmd_name(cmd), data);
1902 switch (cmd) {
1903 case DTV_CLEAR:
1904 /*
1905 * Reset a cache of data specific to the frontend here. This does
1906 * not effect hardware.
1907 */
1908 dvb_frontend_clear_cache(fe);
1909 break;
1910 case DTV_TUNE:
1911 /*
1912 * Use the cached Digital TV properties to tune the
1913 * frontend
1914 */
1915 dev_dbg(fe->dvb->device,
1916 "%s: Setting the frontend from property cache\n",
1917 __func__);
1918
1919 r = dtv_set_frontend(fe);
1920 break;
1921 case DTV_FREQUENCY:
1922 c->frequency = data;
1923 break;
1924 case DTV_MODULATION:
1925 c->modulation = data;
1926 break;
1927 case DTV_BANDWIDTH_HZ:
1928 c->bandwidth_hz = data;
1929 break;
1930 case DTV_INVERSION:
1931 c->inversion = data;
1932 break;
1933 case DTV_SYMBOL_RATE:
1934 c->symbol_rate = data;
1935 break;
1936 case DTV_INNER_FEC:
1937 c->fec_inner = data;
1938 break;
1939 case DTV_PILOT:
1940 c->pilot = data;
1941 break;
1942 case DTV_ROLLOFF:
1943 c->rolloff = data;
1944 break;
1945 case DTV_DELIVERY_SYSTEM:
1946 r = dvbv5_set_delivery_system(fe, data);
1947 break;
1948 case DTV_VOLTAGE:
1949 c->voltage = data;
1950 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
1951 (void *)c->voltage);
1952 break;
1953 case DTV_TONE:
1954 c->sectone = data;
1955 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
1956 (void *)c->sectone);
1957 break;
1958 case DTV_CODE_RATE_HP:
1959 c->code_rate_HP = data;
1960 break;
1961 case DTV_CODE_RATE_LP:
1962 c->code_rate_LP = data;
1963 break;
1964 case DTV_GUARD_INTERVAL:
1965 c->guard_interval = data;
1966 break;
1967 case DTV_TRANSMISSION_MODE:
1968 c->transmission_mode = data;
1969 break;
1970 case DTV_HIERARCHY:
1971 c->hierarchy = data;
1972 break;
1973 case DTV_INTERLEAVING:
1974 c->interleaving = data;
1975 break;
1976
1977 /* ISDB-T Support here */
1978 case DTV_ISDBT_PARTIAL_RECEPTION:
1979 c->isdbt_partial_reception = data;
1980 break;
1981 case DTV_ISDBT_SOUND_BROADCASTING:
1982 c->isdbt_sb_mode = data;
1983 break;
1984 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1985 c->isdbt_sb_subchannel = data;
1986 break;
1987 case DTV_ISDBT_SB_SEGMENT_IDX:
1988 c->isdbt_sb_segment_idx = data;
1989 break;
1990 case DTV_ISDBT_SB_SEGMENT_COUNT:
1991 c->isdbt_sb_segment_count = data;
1992 break;
1993 case DTV_ISDBT_LAYER_ENABLED:
1994 c->isdbt_layer_enabled = data;
1995 break;
1996 case DTV_ISDBT_LAYERA_FEC:
1997 c->layer[0].fec = data;
1998 break;
1999 case DTV_ISDBT_LAYERA_MODULATION:
2000 c->layer[0].modulation = data;
2001 break;
2002 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
2003 c->layer[0].segment_count = data;
2004 break;
2005 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
2006 c->layer[0].interleaving = data;
2007 break;
2008 case DTV_ISDBT_LAYERB_FEC:
2009 c->layer[1].fec = data;
2010 break;
2011 case DTV_ISDBT_LAYERB_MODULATION:
2012 c->layer[1].modulation = data;
2013 break;
2014 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
2015 c->layer[1].segment_count = data;
2016 break;
2017 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
2018 c->layer[1].interleaving = data;
2019 break;
2020 case DTV_ISDBT_LAYERC_FEC:
2021 c->layer[2].fec = data;
2022 break;
2023 case DTV_ISDBT_LAYERC_MODULATION:
2024 c->layer[2].modulation = data;
2025 break;
2026 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
2027 c->layer[2].segment_count = data;
2028 break;
2029 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
2030 c->layer[2].interleaving = data;
2031 break;
2032
2033 /* Multistream support */
2034 case DTV_STREAM_ID:
2035 case DTV_DVBT2_PLP_ID_LEGACY:
2036 c->stream_id = data;
2037 break;
2038
2039 /* Physical layer scrambling support */
2040 case DTV_SCRAMBLING_SEQUENCE_INDEX:
2041 c->scrambling_sequence_index = data;
2042 break;
2043
2044 /* ATSC-MH */
2045 case DTV_ATSCMH_PARADE_ID:
2046 fe->dtv_property_cache.atscmh_parade_id = data;
2047 break;
2048 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
2049 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data;
2050 break;
2051
2052 case DTV_LNA:
2053 c->lna = data;
2054 if (fe->ops.set_lna)
2055 r = fe->ops.set_lna(fe);
2056 if (r < 0)
2057 c->lna = LNA_AUTO;
2058 break;
2059
2060 default:
2061 return -EINVAL;
2062 }
2063
2064 return r;
2065}
2066
2067static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd,
2068 void *parg)
2069{
2070 struct dvb_device *dvbdev = file->private_data;
2071 struct dvb_frontend *fe = dvbdev->priv;
2072 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2073 int err;
2074
2075 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
2076 if (down_interruptible(&fepriv->sem))
2077 return -ERESTARTSYS;
2078
2079 if (fe->exit != DVB_FE_NO_EXIT) {
2080 up(&fepriv->sem);
2081 return -ENODEV;
2082 }
2083
2084 /*
2085 * If the frontend is opened in read-only mode, only the ioctls
2086 * that don't interfere with the tune logic should be accepted.
2087 * That allows an external application to monitor the DVB QoS and
2088 * statistics parameters.
2089 *
2090 * That matches all _IOR() ioctls, except for two special cases:
2091 * - FE_GET_EVENT is part of the tuning logic on a DVB application;
2092 * - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0
2093 * setup
2094 * So, those two ioctls should also return -EPERM, as otherwise
2095 * reading from them would interfere with a DVB tune application
2096 */
2097 if ((file->f_flags & O_ACCMODE) == O_RDONLY
2098 && (_IOC_DIR(cmd) != _IOC_READ
2099 || cmd == FE_GET_EVENT
2100 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
2101 up(&fepriv->sem);
2102 return -EPERM;
2103 }
2104
2105 err = dvb_frontend_handle_ioctl(file, cmd, parg);
2106
2107 up(&fepriv->sem);
2108 return err;
2109}
2110
2111static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
2112 unsigned long arg)
2113{
2114 struct dvb_device *dvbdev = file->private_data;
2115
2116 if (!dvbdev)
2117 return -ENODEV;
2118
2119 return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
2120}
2121
2122#ifdef CONFIG_COMPAT
2123struct compat_dtv_property {
2124 __u32 cmd;
2125 __u32 reserved[3];
2126 union {
2127 __u32 data;
2128 struct dtv_fe_stats st;
2129 struct {
2130 __u8 data[32];
2131 __u32 len;
2132 __u32 reserved1[3];
2133 compat_uptr_t reserved2;
2134 } buffer;
2135 } u;
2136 int result;
2137} __attribute__ ((packed));
2138
2139struct compat_dtv_properties {
2140 __u32 num;
2141 compat_uptr_t props;
2142};
2143
2144#define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties)
2145#define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties)
2146
2147static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd,
2148 unsigned long arg)
2149{
2150 struct dvb_device *dvbdev = file->private_data;
2151 struct dvb_frontend *fe = dvbdev->priv;
2152 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2153 int i, err = 0;
2154
2155 if (cmd == COMPAT_FE_SET_PROPERTY) {
2156 struct compat_dtv_properties prop, *tvps = NULL;
2157 struct compat_dtv_property *tvp = NULL;
2158
2159 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2160 return -EFAULT;
2161
2162 tvps = ∝
2163
2164 /*
2165 * Put an arbitrary limit on the number of messages that can
2166 * be sent at once
2167 */
2168 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2169 return -EINVAL;
2170
2171 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2172 if (IS_ERR(tvp))
2173 return PTR_ERR(tvp);
2174
2175 for (i = 0; i < tvps->num; i++) {
2176 err = dtv_property_process_set(fe, file,
2177 (tvp + i)->cmd,
2178 (tvp + i)->u.data);
2179 if (err < 0) {
2180 kfree(tvp);
2181 return err;
2182 }
2183 }
2184 kfree(tvp);
2185 } else if (cmd == COMPAT_FE_GET_PROPERTY) {
2186 struct compat_dtv_properties prop, *tvps = NULL;
2187 struct compat_dtv_property *tvp = NULL;
2188 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2189
2190 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2191 return -EFAULT;
2192
2193 tvps = ∝
2194
2195 /*
2196 * Put an arbitrary limit on the number of messages that can
2197 * be sent at once
2198 */
2199 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2200 return -EINVAL;
2201
2202 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2203 if (IS_ERR(tvp))
2204 return PTR_ERR(tvp);
2205
2206 /*
2207 * Let's use our own copy of property cache, in order to
2208 * avoid mangling with DTV zigzag logic, as drivers might
2209 * return crap, if they don't check if the data is available
2210 * before updating the properties cache.
2211 */
2212 if (fepriv->state != FESTATE_IDLE) {
2213 err = dtv_get_frontend(fe, &getp, NULL);
2214 if (err < 0) {
2215 kfree(tvp);
2216 return err;
2217 }
2218 }
2219 for (i = 0; i < tvps->num; i++) {
2220 err = dtv_property_process_get(
2221 fe, &getp, (struct dtv_property *)(tvp + i), file);
2222 if (err < 0) {
2223 kfree(tvp);
2224 return err;
2225 }
2226 }
2227
2228 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp,
2229 tvps->num * sizeof(struct compat_dtv_property))) {
2230 kfree(tvp);
2231 return -EFAULT;
2232 }
2233 kfree(tvp);
2234 }
2235
2236 return err;
2237}
2238
2239static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd,
2240 unsigned long arg)
2241{
2242 struct dvb_device *dvbdev = file->private_data;
2243 struct dvb_frontend *fe = dvbdev->priv;
2244 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2245 int err;
2246
2247 if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) {
2248 if (down_interruptible(&fepriv->sem))
2249 return -ERESTARTSYS;
2250
2251 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg);
2252
2253 up(&fepriv->sem);
2254 return err;
2255 }
2256
2257 return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2258}
2259#endif
2260
2261static int dtv_set_frontend(struct dvb_frontend *fe)
2262{
2263 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2264 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2265 u32 rolloff = 0;
2266
2267 if (dvb_frontend_check_parameters(fe) < 0)
2268 return -EINVAL;
2269
2270 /*
2271 * Initialize output parameters to match the values given by
2272 * the user. FE_SET_FRONTEND triggers an initial frontend event
2273 * with status = 0, which copies output parameters to userspace.
2274 */
2275 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2276
2277 /*
2278 * Be sure that the bandwidth will be filled for all
2279 * non-satellite systems, as tuners need to know what
2280 * low pass/Nyquist half filter should be applied, in
2281 * order to avoid inter-channel noise.
2282 *
2283 * ISDB-T and DVB-T/T2 already sets bandwidth.
2284 * ATSC and DVB-C don't set, so, the core should fill it.
2285 *
2286 * On DVB-C Annex A and C, the bandwidth is a function of
2287 * the roll-off and symbol rate. Annex B defines different
2288 * roll-off factors depending on the modulation. Fortunately,
2289 * Annex B is only used with 6MHz, so there's no need to
2290 * calculate it.
2291 *
2292 * While not officially supported, a side effect of handling it at
2293 * the cache level is that a program could retrieve the bandwidth
2294 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2295 */
2296 switch (c->delivery_system) {
2297 case SYS_ATSC:
2298 case SYS_DVBC_ANNEX_B:
2299 c->bandwidth_hz = 6000000;
2300 break;
2301 case SYS_DVBC_ANNEX_A:
2302 rolloff = 115;
2303 break;
2304 case SYS_DVBC_ANNEX_C:
2305 rolloff = 113;
2306 break;
2307 case SYS_DSS:
2308 rolloff = 120;
2309 break;
2310 case SYS_DVBS:
2311 case SYS_TURBO:
2312 case SYS_ISDBS:
2313 rolloff = 135;
2314 break;
2315 case SYS_DVBS2:
2316 switch (c->rolloff) {
2317 case ROLLOFF_20:
2318 rolloff = 120;
2319 break;
2320 case ROLLOFF_25:
2321 rolloff = 125;
2322 break;
2323 default:
2324 case ROLLOFF_35:
2325 rolloff = 135;
2326 }
2327 break;
2328 default:
2329 break;
2330 }
2331 if (rolloff)
2332 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2333
2334 /* force auto frequency inversion if requested */
2335 if (dvb_force_auto_inversion)
2336 c->inversion = INVERSION_AUTO;
2337
2338 /*
2339 * without hierarchical coding code_rate_LP is irrelevant,
2340 * so we tolerate the otherwise invalid FEC_NONE setting
2341 */
2342 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2343 c->code_rate_LP = FEC_AUTO;
2344
2345 prepare_tuning_algo_parameters(fe);
2346
2347 fepriv->state = FESTATE_RETUNE;
2348
2349 /* Request the search algorithm to search */
2350 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2351
2352 dvb_frontend_clear_events(fe);
2353 dvb_frontend_add_event(fe, 0);
2354 dvb_frontend_wakeup(fe);
2355 fepriv->status = 0;
2356
2357 return 0;
2358}
2359
2360static int dvb_get_property(struct dvb_frontend *fe, struct file *file,
2361 struct dtv_properties *tvps)
2362{
2363 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2364 struct dtv_property *tvp = NULL;
2365 struct dtv_frontend_properties getp;
2366 int i, err;
2367
2368 memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
2369
2370 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2371 __func__, tvps->num);
2372 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2373 __func__, tvps->props);
2374
2375 /*
2376 * Put an arbitrary limit on the number of messages that can
2377 * be sent at once
2378 */
2379 if (!tvps->num || tvps->num > DTV_IOCTL_MAX_MSGS)
2380 return -EINVAL;
2381
2382 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2383 if (IS_ERR(tvp))
2384 return PTR_ERR(tvp);
2385
2386 /*
2387 * Let's use our own copy of property cache, in order to
2388 * avoid mangling with DTV zigzag logic, as drivers might
2389 * return crap, if they don't check if the data is available
2390 * before updating the properties cache.
2391 */
2392 if (fepriv->state != FESTATE_IDLE) {
2393 err = dtv_get_frontend(fe, &getp, NULL);
2394 if (err < 0)
2395 goto out;
2396 }
2397 for (i = 0; i < tvps->num; i++) {
2398 err = dtv_property_process_get(fe, &getp,
2399 tvp + i, file);
2400 if (err < 0)
2401 goto out;
2402 }
2403
2404 if (copy_to_user((void __user *)tvps->props, tvp,
2405 tvps->num * sizeof(struct dtv_property))) {
2406 err = -EFAULT;
2407 goto out;
2408 }
2409
2410 err = 0;
2411out:
2412 kfree(tvp);
2413 return err;
2414}
2415
2416static int dvb_get_frontend(struct dvb_frontend *fe,
2417 struct dvb_frontend_parameters *p_out)
2418{
2419 struct dtv_frontend_properties getp;
2420
2421 /*
2422 * Let's use our own copy of property cache, in order to
2423 * avoid mangling with DTV zigzag logic, as drivers might
2424 * return crap, if they don't check if the data is available
2425 * before updating the properties cache.
2426 */
2427 memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
2428
2429 return dtv_get_frontend(fe, &getp, p_out);
2430}
2431
2432static int dvb_frontend_handle_ioctl(struct file *file,
2433 unsigned int cmd, void *parg)
2434{
2435 struct dvb_device *dvbdev = file->private_data;
2436 struct dvb_frontend *fe = dvbdev->priv;
2437 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2438 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2439 int i, err = -ENOTSUPP;
2440
2441 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2442
2443 switch (cmd) {
2444 case FE_SET_PROPERTY: {
2445 struct dtv_properties *tvps = parg;
2446 struct dtv_property *tvp = NULL;
2447
2448 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2449 __func__, tvps->num);
2450 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2451 __func__, tvps->props);
2452
2453 /*
2454 * Put an arbitrary limit on the number of messages that can
2455 * be sent at once
2456 */
2457 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2458 return -EINVAL;
2459
2460 tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2461 if (IS_ERR(tvp))
2462 return PTR_ERR(tvp);
2463
2464 for (i = 0; i < tvps->num; i++) {
2465 err = dtv_property_process_set(fe, file,
2466 (tvp + i)->cmd,
2467 (tvp + i)->u.data);
2468 if (err < 0) {
2469 kfree(tvp);
2470 return err;
2471 }
2472 }
2473 kfree(tvp);
2474 err = 0;
2475 break;
2476 }
2477 case FE_GET_PROPERTY:
2478 err = dvb_get_property(fe, file, parg);
2479 break;
2480
2481 case FE_GET_INFO: {
2482 struct dvb_frontend_info *info = parg;
2483 memset(info, 0, sizeof(*info));
2484
2485 strscpy(info->name, fe->ops.info.name, sizeof(info->name));
2486 info->symbol_rate_min = fe->ops.info.symbol_rate_min;
2487 info->symbol_rate_max = fe->ops.info.symbol_rate_max;
2488 info->symbol_rate_tolerance = fe->ops.info.symbol_rate_tolerance;
2489 info->caps = fe->ops.info.caps;
2490 info->frequency_stepsize = dvb_frontend_get_stepsize(fe);
2491 dvb_frontend_get_frequency_limits(fe, &info->frequency_min,
2492 &info->frequency_max,
2493 &info->frequency_tolerance);
2494
2495 /*
2496 * Associate the 4 delivery systems supported by DVBv3
2497 * API with their DVBv5 counterpart. For the other standards,
2498 * use the closest type, assuming that it would hopefully
2499 * work with a DVBv3 application.
2500 * It should be noticed that, on multi-frontend devices with
2501 * different types (terrestrial and cable, for example),
2502 * a pure DVBv3 application won't be able to use all delivery
2503 * systems. Yet, changing the DVBv5 cache to the other delivery
2504 * system should be enough for making it work.
2505 */
2506 switch (dvbv3_type(c->delivery_system)) {
2507 case DVBV3_QPSK:
2508 info->type = FE_QPSK;
2509 break;
2510 case DVBV3_ATSC:
2511 info->type = FE_ATSC;
2512 break;
2513 case DVBV3_QAM:
2514 info->type = FE_QAM;
2515 break;
2516 case DVBV3_OFDM:
2517 info->type = FE_OFDM;
2518 break;
2519 default:
2520 dev_err(fe->dvb->device,
2521 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2522 __func__, c->delivery_system);
2523 info->type = FE_OFDM;
2524 }
2525 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2526 __func__, c->delivery_system, info->type);
2527
2528 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2529 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2530 info->caps |= FE_CAN_INVERSION_AUTO;
2531 err = 0;
2532 break;
2533 }
2534
2535 case FE_READ_STATUS: {
2536 enum fe_status *status = parg;
2537
2538 /* if retune was requested but hasn't occurred yet, prevent
2539 * that user get signal state from previous tuning */
2540 if (fepriv->state == FESTATE_RETUNE ||
2541 fepriv->state == FESTATE_ERROR) {
2542 err = 0;
2543 *status = 0;
2544 break;
2545 }
2546
2547 if (fe->ops.read_status)
2548 err = fe->ops.read_status(fe, status);
2549 break;
2550 }
2551
2552 case FE_DISEQC_RESET_OVERLOAD:
2553 if (fe->ops.diseqc_reset_overload) {
2554 err = fe->ops.diseqc_reset_overload(fe);
2555 fepriv->state = FESTATE_DISEQC;
2556 fepriv->status = 0;
2557 }
2558 break;
2559
2560 case FE_DISEQC_SEND_MASTER_CMD:
2561 if (fe->ops.diseqc_send_master_cmd) {
2562 struct dvb_diseqc_master_cmd *cmd = parg;
2563
2564 if (cmd->msg_len > sizeof(cmd->msg)) {
2565 err = -EINVAL;
2566 break;
2567 }
2568 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2569 fepriv->state = FESTATE_DISEQC;
2570 fepriv->status = 0;
2571 }
2572 break;
2573
2574 case FE_DISEQC_SEND_BURST:
2575 if (fe->ops.diseqc_send_burst) {
2576 err = fe->ops.diseqc_send_burst(fe, (long)parg);
2577 fepriv->state = FESTATE_DISEQC;
2578 fepriv->status = 0;
2579 }
2580 break;
2581
2582 case FE_SET_TONE:
2583 if (fe->ops.set_tone) {
2584 fepriv->tone = (long)parg;
2585 err = fe->ops.set_tone(fe, fepriv->tone);
2586 fepriv->state = FESTATE_DISEQC;
2587 fepriv->status = 0;
2588 }
2589 break;
2590
2591 case FE_SET_VOLTAGE:
2592 if (fe->ops.set_voltage) {
2593 fepriv->voltage = (long)parg;
2594 err = fe->ops.set_voltage(fe, fepriv->voltage);
2595 fepriv->state = FESTATE_DISEQC;
2596 fepriv->status = 0;
2597 }
2598 break;
2599
2600 case FE_DISEQC_RECV_SLAVE_REPLY:
2601 if (fe->ops.diseqc_recv_slave_reply)
2602 err = fe->ops.diseqc_recv_slave_reply(fe, parg);
2603 break;
2604
2605 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2606 if (fe->ops.enable_high_lnb_voltage)
2607 err = fe->ops.enable_high_lnb_voltage(fe, (long)parg);
2608 break;
2609
2610 case FE_SET_FRONTEND_TUNE_MODE:
2611 fepriv->tune_mode_flags = (unsigned long)parg;
2612 err = 0;
2613 break;
2614 /* DEPRECATED dish control ioctls */
2615
2616 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2617 if (fe->ops.dishnetwork_send_legacy_command) {
2618 err = fe->ops.dishnetwork_send_legacy_command(fe,
2619 (unsigned long)parg);
2620 fepriv->state = FESTATE_DISEQC;
2621 fepriv->status = 0;
2622 } else if (fe->ops.set_voltage) {
2623 /*
2624 * NOTE: This is a fallback condition. Some frontends
2625 * (stv0299 for instance) take longer than 8msec to
2626 * respond to a set_voltage command. Those switches
2627 * need custom routines to switch properly. For all
2628 * other frontends, the following should work ok.
2629 * Dish network legacy switches (as used by Dish500)
2630 * are controlled by sending 9-bit command words
2631 * spaced 8msec apart.
2632 * the actual command word is switch/port dependent
2633 * so it is up to the userspace application to send
2634 * the right command.
2635 * The command must always start with a '0' after
2636 * initialization, so parg is 8 bits and does not
2637 * include the initialization or start bit
2638 */
2639 unsigned long swcmd = ((unsigned long)parg) << 1;
2640 ktime_t nexttime;
2641 ktime_t tv[10];
2642 int i;
2643 u8 last = 1;
2644
2645 if (dvb_frontend_debug)
2646 dprintk("switch command: 0x%04lx\n",
2647 swcmd);
2648 nexttime = ktime_get_boottime();
2649 if (dvb_frontend_debug)
2650 tv[0] = nexttime;
2651 /* before sending a command, initialize by sending
2652 * a 32ms 18V to the switch
2653 */
2654 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2655 dvb_frontend_sleep_until(&nexttime, 32000);
2656
2657 for (i = 0; i < 9; i++) {
2658 if (dvb_frontend_debug)
2659 tv[i + 1] = ktime_get_boottime();
2660 if ((swcmd & 0x01) != last) {
2661 /* set voltage to (last ? 13V : 18V) */
2662 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2663 last = (last) ? 0 : 1;
2664 }
2665 swcmd = swcmd >> 1;
2666 if (i != 8)
2667 dvb_frontend_sleep_until(&nexttime, 8000);
2668 }
2669 if (dvb_frontend_debug) {
2670 dprintk("(adapter %d): switch delay (should be 32k followed by all 8k)\n",
2671 fe->dvb->num);
2672 for (i = 1; i < 10; i++)
2673 pr_info("%d: %d\n", i,
2674 (int)ktime_us_delta(tv[i], tv[i - 1]));
2675 }
2676 err = 0;
2677 fepriv->state = FESTATE_DISEQC;
2678 fepriv->status = 0;
2679 }
2680 break;
2681
2682 /* DEPRECATED statistics ioctls */
2683
2684 case FE_READ_BER:
2685 if (fe->ops.read_ber) {
2686 if (fepriv->thread)
2687 err = fe->ops.read_ber(fe, parg);
2688 else
2689 err = -EAGAIN;
2690 }
2691 break;
2692
2693 case FE_READ_SIGNAL_STRENGTH:
2694 if (fe->ops.read_signal_strength) {
2695 if (fepriv->thread)
2696 err = fe->ops.read_signal_strength(fe, parg);
2697 else
2698 err = -EAGAIN;
2699 }
2700 break;
2701
2702 case FE_READ_SNR:
2703 if (fe->ops.read_snr) {
2704 if (fepriv->thread)
2705 err = fe->ops.read_snr(fe, parg);
2706 else
2707 err = -EAGAIN;
2708 }
2709 break;
2710
2711 case FE_READ_UNCORRECTED_BLOCKS:
2712 if (fe->ops.read_ucblocks) {
2713 if (fepriv->thread)
2714 err = fe->ops.read_ucblocks(fe, parg);
2715 else
2716 err = -EAGAIN;
2717 }
2718 break;
2719
2720 /* DEPRECATED DVBv3 ioctls */
2721
2722 case FE_SET_FRONTEND:
2723 err = dvbv3_set_delivery_system(fe);
2724 if (err)
2725 break;
2726
2727 err = dtv_property_cache_sync(fe, c, parg);
2728 if (err)
2729 break;
2730 err = dtv_set_frontend(fe);
2731 break;
2732
2733 case FE_GET_EVENT:
2734 err = dvb_frontend_get_event(fe, parg, file->f_flags);
2735 break;
2736
2737 case FE_GET_FRONTEND:
2738 err = dvb_get_frontend(fe, parg);
2739 break;
2740
2741 default:
2742 return -ENOTSUPP;
2743 } /* switch */
2744
2745 return err;
2746}
2747
2748static __poll_t dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2749{
2750 struct dvb_device *dvbdev = file->private_data;
2751 struct dvb_frontend *fe = dvbdev->priv;
2752 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2753
2754 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2755
2756 poll_wait(file, &fepriv->events.wait_queue, wait);
2757
2758 if (fepriv->events.eventw != fepriv->events.eventr)
2759 return (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
2760
2761 return 0;
2762}
2763
2764static int dvb_frontend_open(struct inode *inode, struct file *file)
2765{
2766 struct dvb_device *dvbdev = file->private_data;
2767 struct dvb_frontend *fe = dvbdev->priv;
2768 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2769 struct dvb_adapter *adapter = fe->dvb;
2770 int ret;
2771
2772 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2773 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2774 return -ENODEV;
2775
2776 if (adapter->mfe_shared == 2) {
2777 mutex_lock(&adapter->mfe_lock);
2778 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2779 if (adapter->mfe_dvbdev &&
2780 !adapter->mfe_dvbdev->writers) {
2781 mutex_unlock(&adapter->mfe_lock);
2782 return -EBUSY;
2783 }
2784 adapter->mfe_dvbdev = dvbdev;
2785 }
2786 } else if (adapter->mfe_shared) {
2787 mutex_lock(&adapter->mfe_lock);
2788
2789 if (!adapter->mfe_dvbdev)
2790 adapter->mfe_dvbdev = dvbdev;
2791
2792 else if (adapter->mfe_dvbdev != dvbdev) {
2793 struct dvb_device
2794 *mfedev = adapter->mfe_dvbdev;
2795 struct dvb_frontend
2796 *mfe = mfedev->priv;
2797 struct dvb_frontend_private
2798 *mfepriv = mfe->frontend_priv;
2799 int mferetry = (dvb_mfe_wait_time << 1);
2800
2801 mutex_unlock(&adapter->mfe_lock);
2802 while (mferetry-- && (mfedev->users != -1 ||
2803 mfepriv->thread)) {
2804 if (msleep_interruptible(500)) {
2805 if (signal_pending(current))
2806 return -EINTR;
2807 }
2808 }
2809
2810 mutex_lock(&adapter->mfe_lock);
2811 if (adapter->mfe_dvbdev != dvbdev) {
2812 mfedev = adapter->mfe_dvbdev;
2813 mfe = mfedev->priv;
2814 mfepriv = mfe->frontend_priv;
2815 if (mfedev->users != -1 ||
2816 mfepriv->thread) {
2817 mutex_unlock(&adapter->mfe_lock);
2818 return -EBUSY;
2819 }
2820 adapter->mfe_dvbdev = dvbdev;
2821 }
2822 }
2823 }
2824
2825 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2826 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2827 goto err0;
2828
2829 /* If we took control of the bus, we need to force
2830 reinitialization. This is because many ts_bus_ctrl()
2831 functions strobe the RESET pin on the demod, and if the
2832 frontend thread already exists then the dvb_init() routine
2833 won't get called (which is what usually does initial
2834 register configuration). */
2835 fepriv->reinitialise = 1;
2836 }
2837
2838 if ((ret = dvb_generic_open(inode, file)) < 0)
2839 goto err1;
2840
2841 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2842 /* normal tune mode when opened R/W */
2843 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2844 fepriv->tone = -1;
2845 fepriv->voltage = -1;
2846
2847#ifdef CONFIG_MEDIA_CONTROLLER_DVB
2848 mutex_lock(&fe->dvb->mdev_lock);
2849 if (fe->dvb->mdev) {
2850 mutex_lock(&fe->dvb->mdev->graph_mutex);
2851 if (fe->dvb->mdev->enable_source)
2852 ret = fe->dvb->mdev->enable_source(
2853 dvbdev->entity,
2854 &fepriv->pipe);
2855 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2856 if (ret) {
2857 mutex_unlock(&fe->dvb->mdev_lock);
2858 dev_err(fe->dvb->device,
2859 "Tuner is busy. Error %d\n", ret);
2860 goto err2;
2861 }
2862 }
2863 mutex_unlock(&fe->dvb->mdev_lock);
2864#endif
2865 ret = dvb_frontend_start(fe);
2866 if (ret)
2867 goto err3;
2868
2869 /* empty event queue */
2870 fepriv->events.eventr = fepriv->events.eventw = 0;
2871 }
2872
2873 dvb_frontend_get(fe);
2874
2875 if (adapter->mfe_shared)
2876 mutex_unlock(&adapter->mfe_lock);
2877 return ret;
2878
2879err3:
2880#ifdef CONFIG_MEDIA_CONTROLLER_DVB
2881 mutex_lock(&fe->dvb->mdev_lock);
2882 if (fe->dvb->mdev) {
2883 mutex_lock(&fe->dvb->mdev->graph_mutex);
2884 if (fe->dvb->mdev->disable_source)
2885 fe->dvb->mdev->disable_source(dvbdev->entity);
2886 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2887 }
2888 mutex_unlock(&fe->dvb->mdev_lock);
2889err2:
2890#endif
2891 dvb_generic_release(inode, file);
2892err1:
2893 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2894 fe->ops.ts_bus_ctrl(fe, 0);
2895err0:
2896 if (adapter->mfe_shared)
2897 mutex_unlock(&adapter->mfe_lock);
2898 return ret;
2899}
2900
2901static int dvb_frontend_release(struct inode *inode, struct file *file)
2902{
2903 struct dvb_device *dvbdev = file->private_data;
2904 struct dvb_frontend *fe = dvbdev->priv;
2905 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2906 int ret;
2907
2908 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2909
2910 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2911 fepriv->release_jiffies = jiffies;
2912 mb();
2913 }
2914
2915 ret = dvb_generic_release(inode, file);
2916
2917 if (dvbdev->users == -1) {
2918 wake_up(&fepriv->wait_queue);
2919#ifdef CONFIG_MEDIA_CONTROLLER_DVB
2920 mutex_lock(&fe->dvb->mdev_lock);
2921 if (fe->dvb->mdev) {
2922 mutex_lock(&fe->dvb->mdev->graph_mutex);
2923 if (fe->dvb->mdev->disable_source)
2924 fe->dvb->mdev->disable_source(dvbdev->entity);
2925 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2926 }
2927 mutex_unlock(&fe->dvb->mdev_lock);
2928#endif
2929 if (fe->exit != DVB_FE_NO_EXIT)
2930 wake_up(&dvbdev->wait_queue);
2931 if (fe->ops.ts_bus_ctrl)
2932 fe->ops.ts_bus_ctrl(fe, 0);
2933 }
2934
2935 dvb_frontend_put(fe);
2936
2937 return ret;
2938}
2939
2940static const struct file_operations dvb_frontend_fops = {
2941 .owner = THIS_MODULE,
2942 .unlocked_ioctl = dvb_frontend_ioctl,
2943#ifdef CONFIG_COMPAT
2944 .compat_ioctl = dvb_frontend_compat_ioctl,
2945#endif
2946 .poll = dvb_frontend_poll,
2947 .open = dvb_frontend_open,
2948 .release = dvb_frontend_release,
2949 .llseek = noop_llseek,
2950};
2951
2952int dvb_frontend_suspend(struct dvb_frontend *fe)
2953{
2954 int ret = 0;
2955
2956 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2957 fe->id);
2958
2959 if (fe->ops.tuner_ops.suspend)
2960 ret = fe->ops.tuner_ops.suspend(fe);
2961 else if (fe->ops.tuner_ops.sleep)
2962 ret = fe->ops.tuner_ops.sleep(fe);
2963
2964 if (fe->ops.suspend)
2965 ret = fe->ops.suspend(fe);
2966 else if (fe->ops.sleep)
2967 ret = fe->ops.sleep(fe);
2968
2969 return ret;
2970}
2971EXPORT_SYMBOL(dvb_frontend_suspend);
2972
2973int dvb_frontend_resume(struct dvb_frontend *fe)
2974{
2975 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2976 int ret = 0;
2977
2978 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2979 fe->id);
2980
2981 fe->exit = DVB_FE_DEVICE_RESUME;
2982 if (fe->ops.resume)
2983 ret = fe->ops.resume(fe);
2984 else if (fe->ops.init)
2985 ret = fe->ops.init(fe);
2986
2987 if (fe->ops.tuner_ops.resume)
2988 ret = fe->ops.tuner_ops.resume(fe);
2989 else if (fe->ops.tuner_ops.init)
2990 ret = fe->ops.tuner_ops.init(fe);
2991
2992 if (fe->ops.set_tone && fepriv->tone != -1)
2993 fe->ops.set_tone(fe, fepriv->tone);
2994 if (fe->ops.set_voltage && fepriv->voltage != -1)
2995 fe->ops.set_voltage(fe, fepriv->voltage);
2996
2997 fe->exit = DVB_FE_NO_EXIT;
2998 fepriv->state = FESTATE_RETUNE;
2999 dvb_frontend_wakeup(fe);
3000
3001 return ret;
3002}
3003EXPORT_SYMBOL(dvb_frontend_resume);
3004
3005int dvb_register_frontend(struct dvb_adapter *dvb,
3006 struct dvb_frontend *fe)
3007{
3008 struct dvb_frontend_private *fepriv;
3009 const struct dvb_device dvbdev_template = {
3010 .users = ~0,
3011 .writers = 1,
3012 .readers = (~0) - 1,
3013 .fops = &dvb_frontend_fops,
3014#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
3015 .name = fe->ops.info.name,
3016#endif
3017 };
3018 int ret;
3019
3020 dev_dbg(dvb->device, "%s:\n", __func__);
3021
3022 if (mutex_lock_interruptible(&frontend_mutex))
3023 return -ERESTARTSYS;
3024
3025 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
3026 if (!fe->frontend_priv) {
3027 mutex_unlock(&frontend_mutex);
3028 return -ENOMEM;
3029 }
3030 fepriv = fe->frontend_priv;
3031
3032 kref_init(&fe->refcount);
3033
3034 /*
3035 * After initialization, there need to be two references: one
3036 * for dvb_unregister_frontend(), and another one for
3037 * dvb_frontend_detach().
3038 */
3039 dvb_frontend_get(fe);
3040
3041 sema_init(&fepriv->sem, 1);
3042 init_waitqueue_head(&fepriv->wait_queue);
3043 init_waitqueue_head(&fepriv->events.wait_queue);
3044 mutex_init(&fepriv->events.mtx);
3045 fe->dvb = dvb;
3046 fepriv->inversion = INVERSION_OFF;
3047
3048 dev_info(fe->dvb->device,
3049 "DVB: registering adapter %i frontend %i (%s)...\n",
3050 fe->dvb->num, fe->id, fe->ops.info.name);
3051
3052 ret = dvb_register_device(fe->dvb, &fepriv->dvbdev, &dvbdev_template,
3053 fe, DVB_DEVICE_FRONTEND, 0);
3054 if (ret) {
3055 dvb_frontend_put(fe);
3056 mutex_unlock(&frontend_mutex);
3057 return ret;
3058 }
3059
3060 /*
3061 * Initialize the cache to the proper values according with the
3062 * first supported delivery system (ops->delsys[0])
3063 */
3064
3065 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
3066 dvb_frontend_clear_cache(fe);
3067
3068 mutex_unlock(&frontend_mutex);
3069 return 0;
3070}
3071EXPORT_SYMBOL(dvb_register_frontend);
3072
3073int dvb_unregister_frontend(struct dvb_frontend *fe)
3074{
3075 struct dvb_frontend_private *fepriv = fe->frontend_priv;
3076
3077 dev_dbg(fe->dvb->device, "%s:\n", __func__);
3078
3079 mutex_lock(&frontend_mutex);
3080 dvb_frontend_stop(fe);
3081 dvb_remove_device(fepriv->dvbdev);
3082
3083 /* fe is invalid now */
3084 mutex_unlock(&frontend_mutex);
3085 dvb_frontend_put(fe);
3086 return 0;
3087}
3088EXPORT_SYMBOL(dvb_unregister_frontend);
3089
3090static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
3091 void (*release)(struct dvb_frontend *fe))
3092{
3093 if (release) {
3094 release(fe);
3095#ifdef CONFIG_MEDIA_ATTACH
3096 dvb_detach(release);
3097#endif
3098 }
3099}
3100
3101void dvb_frontend_detach(struct dvb_frontend *fe)
3102{
3103 dvb_frontend_invoke_release(fe, fe->ops.release_sec);
3104 dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
3105 dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
3106 dvb_frontend_put(fe);
3107}
3108EXPORT_SYMBOL(dvb_frontend_detach);