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[mirror_ubuntu-bionic-kernel.git] / drivers / media / dvb-core / dvb_frontend.c
1 /*
2 * dvb_frontend.c: DVB frontend tuning interface/thread
3 *
4 *
5 * Copyright (C) 1999-2001 Ralph Metzler
6 * Marcus Metzler
7 * Holger Waechtler
8 * for convergence integrated media GmbH
9 *
10 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 * To obtain the license, point your browser to
22 * http://www.gnu.org/copyleft/gpl.html
23 */
24
25 /* Enables DVBv3 compatibility bits at the headers */
26 #define __DVB_CORE__
27
28 #define pr_fmt(fmt) "dvb_frontend: " fmt
29
30 #include <linux/string.h>
31 #include <linux/kernel.h>
32 #include <linux/sched/signal.h>
33 #include <linux/wait.h>
34 #include <linux/slab.h>
35 #include <linux/poll.h>
36 #include <linux/semaphore.h>
37 #include <linux/module.h>
38 #include <linux/list.h>
39 #include <linux/freezer.h>
40 #include <linux/jiffies.h>
41 #include <linux/kthread.h>
42 #include <linux/ktime.h>
43 #include <asm/processor.h>
44
45 #include "dvb_frontend.h"
46 #include "dvbdev.h"
47 #include <linux/dvb/version.h>
48
49 static int dvb_frontend_debug;
50 static int dvb_shutdown_timeout;
51 static int dvb_force_auto_inversion;
52 static int dvb_override_tune_delay;
53 static int dvb_powerdown_on_sleep = 1;
54 static int dvb_mfe_wait_time = 5;
55
56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
58 module_param(dvb_shutdown_timeout, int, 0644);
59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
60 module_param(dvb_force_auto_inversion, int, 0644);
61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
62 module_param(dvb_override_tune_delay, int, 0644);
63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
64 module_param(dvb_powerdown_on_sleep, int, 0644);
65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
66 module_param(dvb_mfe_wait_time, int, 0644);
67 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
68
69 #define dprintk(fmt, arg...) \
70 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
71
72 #define FESTATE_IDLE 1
73 #define FESTATE_RETUNE 2
74 #define FESTATE_TUNING_FAST 4
75 #define FESTATE_TUNING_SLOW 8
76 #define FESTATE_TUNED 16
77 #define FESTATE_ZIGZAG_FAST 32
78 #define FESTATE_ZIGZAG_SLOW 64
79 #define FESTATE_DISEQC 128
80 #define FESTATE_ERROR 256
81 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
82 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
83 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
84 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
85
86 /*
87 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
88 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
89 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
90 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
91 * FESTATE_TUNED. The frontend has successfully locked on.
92 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
93 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
94 * FESTATE_DISEQC. A DISEQC command has just been issued.
95 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
96 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
97 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
98 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
99 */
100
101 static DEFINE_MUTEX(frontend_mutex);
102
103 struct dvb_frontend_private {
104 /* thread/frontend values */
105 struct dvb_device *dvbdev;
106 struct dvb_frontend_parameters parameters_out;
107 struct dvb_fe_events events;
108 struct semaphore sem;
109 struct list_head list_head;
110 wait_queue_head_t wait_queue;
111 struct task_struct *thread;
112 unsigned long release_jiffies;
113 unsigned int wakeup;
114 enum fe_status status;
115 unsigned long tune_mode_flags;
116 unsigned int delay;
117 unsigned int reinitialise;
118 int tone;
119 int voltage;
120
121 /* swzigzag values */
122 unsigned int state;
123 unsigned int bending;
124 int lnb_drift;
125 unsigned int inversion;
126 unsigned int auto_step;
127 unsigned int auto_sub_step;
128 unsigned int started_auto_step;
129 unsigned int min_delay;
130 unsigned int max_drift;
131 unsigned int step_size;
132 int quality;
133 unsigned int check_wrapped;
134 enum dvbfe_search algo_status;
135
136 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
137 struct media_pipeline pipe;
138 #endif
139 };
140
141 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
142 void (*release)(struct dvb_frontend *fe));
143
144 static void dvb_frontend_free(struct kref *ref)
145 {
146 struct dvb_frontend *fe =
147 container_of(ref, struct dvb_frontend, refcount);
148 struct dvb_frontend_private *fepriv = fe->frontend_priv;
149
150 dvb_free_device(fepriv->dvbdev);
151
152 dvb_frontend_invoke_release(fe, fe->ops.release);
153
154 kfree(fepriv);
155 }
156
157 static void dvb_frontend_put(struct dvb_frontend *fe)
158 {
159 kref_put(&fe->refcount, dvb_frontend_free);
160 }
161
162 static void dvb_frontend_get(struct dvb_frontend *fe)
163 {
164 kref_get(&fe->refcount);
165 }
166
167 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
168 static int dtv_get_frontend(struct dvb_frontend *fe,
169 struct dtv_frontend_properties *c,
170 struct dvb_frontend_parameters *p_out);
171 static int
172 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
173 const struct dtv_frontend_properties *c,
174 struct dvb_frontend_parameters *p);
175
176 static bool has_get_frontend(struct dvb_frontend *fe)
177 {
178 return fe->ops.get_frontend != NULL;
179 }
180
181 /*
182 * Due to DVBv3 API calls, a delivery system should be mapped into one of
183 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
184 * otherwise, a DVBv3 call will fail.
185 */
186 enum dvbv3_emulation_type {
187 DVBV3_UNKNOWN,
188 DVBV3_QPSK,
189 DVBV3_QAM,
190 DVBV3_OFDM,
191 DVBV3_ATSC,
192 };
193
194 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
195 {
196 switch (delivery_system) {
197 case SYS_DVBC_ANNEX_A:
198 case SYS_DVBC_ANNEX_C:
199 return DVBV3_QAM;
200 case SYS_DVBS:
201 case SYS_DVBS2:
202 case SYS_TURBO:
203 case SYS_ISDBS:
204 case SYS_DSS:
205 return DVBV3_QPSK;
206 case SYS_DVBT:
207 case SYS_DVBT2:
208 case SYS_ISDBT:
209 case SYS_DTMB:
210 return DVBV3_OFDM;
211 case SYS_ATSC:
212 case SYS_ATSCMH:
213 case SYS_DVBC_ANNEX_B:
214 return DVBV3_ATSC;
215 case SYS_UNDEFINED:
216 case SYS_ISDBC:
217 case SYS_DVBH:
218 case SYS_DAB:
219 default:
220 /*
221 * Doesn't know how to emulate those types and/or
222 * there's no frontend driver from this type yet
223 * with some emulation code, so, we're not sure yet how
224 * to handle them, or they're not compatible with a DVBv3 call.
225 */
226 return DVBV3_UNKNOWN;
227 }
228 }
229
230 static void dvb_frontend_add_event(struct dvb_frontend *fe,
231 enum fe_status status)
232 {
233 struct dvb_frontend_private *fepriv = fe->frontend_priv;
234 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
235 struct dvb_fe_events *events = &fepriv->events;
236 struct dvb_frontend_event *e;
237 int wp;
238
239 dev_dbg(fe->dvb->device, "%s:\n", __func__);
240
241 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
242 dtv_get_frontend(fe, c, &fepriv->parameters_out);
243
244 mutex_lock(&events->mtx);
245
246 wp = (events->eventw + 1) % MAX_EVENT;
247 if (wp == events->eventr) {
248 events->overflow = 1;
249 events->eventr = (events->eventr + 1) % MAX_EVENT;
250 }
251
252 e = &events->events[events->eventw];
253 e->status = status;
254 e->parameters = fepriv->parameters_out;
255
256 events->eventw = wp;
257
258 mutex_unlock(&events->mtx);
259
260 wake_up_interruptible (&events->wait_queue);
261 }
262
263 static int dvb_frontend_get_event(struct dvb_frontend *fe,
264 struct dvb_frontend_event *event, int flags)
265 {
266 struct dvb_frontend_private *fepriv = fe->frontend_priv;
267 struct dvb_fe_events *events = &fepriv->events;
268
269 dev_dbg(fe->dvb->device, "%s:\n", __func__);
270
271 if (events->overflow) {
272 events->overflow = 0;
273 return -EOVERFLOW;
274 }
275
276 if (events->eventw == events->eventr) {
277 int ret;
278
279 if (flags & O_NONBLOCK)
280 return -EWOULDBLOCK;
281
282 up(&fepriv->sem);
283
284 ret = wait_event_interruptible (events->wait_queue,
285 events->eventw != events->eventr);
286
287 if (down_interruptible (&fepriv->sem))
288 return -ERESTARTSYS;
289
290 if (ret < 0)
291 return ret;
292 }
293
294 mutex_lock(&events->mtx);
295 *event = events->events[events->eventr];
296 events->eventr = (events->eventr + 1) % MAX_EVENT;
297 mutex_unlock(&events->mtx);
298
299 return 0;
300 }
301
302 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
303 {
304 struct dvb_frontend_private *fepriv = fe->frontend_priv;
305 struct dvb_fe_events *events = &fepriv->events;
306
307 mutex_lock(&events->mtx);
308 events->eventr = events->eventw;
309 mutex_unlock(&events->mtx);
310 }
311
312 static void dvb_frontend_init(struct dvb_frontend *fe)
313 {
314 dev_dbg(fe->dvb->device,
315 "%s: initialising adapter %i frontend %i (%s)...\n",
316 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
317
318 if (fe->ops.init)
319 fe->ops.init(fe);
320 if (fe->ops.tuner_ops.init) {
321 if (fe->ops.i2c_gate_ctrl)
322 fe->ops.i2c_gate_ctrl(fe, 1);
323 fe->ops.tuner_ops.init(fe);
324 if (fe->ops.i2c_gate_ctrl)
325 fe->ops.i2c_gate_ctrl(fe, 0);
326 }
327 }
328
329 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
330 {
331 struct dvb_frontend_private *fepriv = fe->frontend_priv;
332
333 fepriv->reinitialise = 1;
334 dvb_frontend_wakeup(fe);
335 }
336 EXPORT_SYMBOL(dvb_frontend_reinitialise);
337
338 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
339 {
340 int q2;
341 struct dvb_frontend *fe = fepriv->dvbdev->priv;
342
343 dev_dbg(fe->dvb->device, "%s:\n", __func__);
344
345 if (locked)
346 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
347 else
348 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
349
350 q2 = fepriv->quality - 128;
351 q2 *= q2;
352
353 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
354 }
355
356 /**
357 * Performs automatic twiddling of frontend parameters.
358 *
359 * @param fe The frontend concerned.
360 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
361 * @returns Number of complete iterations that have been performed.
362 */
363 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
364 {
365 int autoinversion;
366 int ready = 0;
367 int fe_set_err = 0;
368 struct dvb_frontend_private *fepriv = fe->frontend_priv;
369 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
370 int original_inversion = c->inversion;
371 u32 original_frequency = c->frequency;
372
373 /* are we using autoinversion? */
374 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
375 (c->inversion == INVERSION_AUTO));
376
377 /* setup parameters correctly */
378 while(!ready) {
379 /* calculate the lnb_drift */
380 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
381
382 /* wrap the auto_step if we've exceeded the maximum drift */
383 if (fepriv->lnb_drift > fepriv->max_drift) {
384 fepriv->auto_step = 0;
385 fepriv->auto_sub_step = 0;
386 fepriv->lnb_drift = 0;
387 }
388
389 /* perform inversion and +/- zigzag */
390 switch(fepriv->auto_sub_step) {
391 case 0:
392 /* try with the current inversion and current drift setting */
393 ready = 1;
394 break;
395
396 case 1:
397 if (!autoinversion) break;
398
399 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
400 ready = 1;
401 break;
402
403 case 2:
404 if (fepriv->lnb_drift == 0) break;
405
406 fepriv->lnb_drift = -fepriv->lnb_drift;
407 ready = 1;
408 break;
409
410 case 3:
411 if (fepriv->lnb_drift == 0) break;
412 if (!autoinversion) break;
413
414 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
415 fepriv->lnb_drift = -fepriv->lnb_drift;
416 ready = 1;
417 break;
418
419 default:
420 fepriv->auto_step++;
421 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
422 break;
423 }
424
425 if (!ready) fepriv->auto_sub_step++;
426 }
427
428 /* if this attempt would hit where we started, indicate a complete
429 * iteration has occurred */
430 if ((fepriv->auto_step == fepriv->started_auto_step) &&
431 (fepriv->auto_sub_step == 0) && check_wrapped) {
432 return 1;
433 }
434
435 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
436 "auto_sub_step:%i started_auto_step:%i\n",
437 __func__, fepriv->lnb_drift, fepriv->inversion,
438 fepriv->auto_step, fepriv->auto_sub_step,
439 fepriv->started_auto_step);
440
441 /* set the frontend itself */
442 c->frequency += fepriv->lnb_drift;
443 if (autoinversion)
444 c->inversion = fepriv->inversion;
445 tmp = *c;
446 if (fe->ops.set_frontend)
447 fe_set_err = fe->ops.set_frontend(fe);
448 *c = tmp;
449 if (fe_set_err < 0) {
450 fepriv->state = FESTATE_ERROR;
451 return fe_set_err;
452 }
453
454 c->frequency = original_frequency;
455 c->inversion = original_inversion;
456
457 fepriv->auto_sub_step++;
458 return 0;
459 }
460
461 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
462 {
463 enum fe_status s = FE_NONE;
464 int retval = 0;
465 struct dvb_frontend_private *fepriv = fe->frontend_priv;
466 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
467
468 /* if we've got no parameters, just keep idling */
469 if (fepriv->state & FESTATE_IDLE) {
470 fepriv->delay = 3*HZ;
471 fepriv->quality = 0;
472 return;
473 }
474
475 /* in SCAN mode, we just set the frontend when asked and leave it alone */
476 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
477 if (fepriv->state & FESTATE_RETUNE) {
478 tmp = *c;
479 if (fe->ops.set_frontend)
480 retval = fe->ops.set_frontend(fe);
481 *c = tmp;
482 if (retval < 0)
483 fepriv->state = FESTATE_ERROR;
484 else
485 fepriv->state = FESTATE_TUNED;
486 }
487 fepriv->delay = 3*HZ;
488 fepriv->quality = 0;
489 return;
490 }
491
492 /* get the frontend status */
493 if (fepriv->state & FESTATE_RETUNE) {
494 s = 0;
495 } else {
496 if (fe->ops.read_status)
497 fe->ops.read_status(fe, &s);
498 if (s != fepriv->status) {
499 dvb_frontend_add_event(fe, s);
500 fepriv->status = s;
501 }
502 }
503
504 /* if we're not tuned, and we have a lock, move to the TUNED state */
505 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
506 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
507 fepriv->state = FESTATE_TUNED;
508
509 /* if we're tuned, then we have determined the correct inversion */
510 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
511 (c->inversion == INVERSION_AUTO)) {
512 c->inversion = fepriv->inversion;
513 }
514 return;
515 }
516
517 /* if we are tuned already, check we're still locked */
518 if (fepriv->state & FESTATE_TUNED) {
519 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
520
521 /* we're tuned, and the lock is still good... */
522 if (s & FE_HAS_LOCK) {
523 return;
524 } else { /* if we _WERE_ tuned, but now don't have a lock */
525 fepriv->state = FESTATE_ZIGZAG_FAST;
526 fepriv->started_auto_step = fepriv->auto_step;
527 fepriv->check_wrapped = 0;
528 }
529 }
530
531 /* don't actually do anything if we're in the LOSTLOCK state,
532 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
533 if ((fepriv->state & FESTATE_LOSTLOCK) &&
534 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
535 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
536 return;
537 }
538
539 /* don't do anything if we're in the DISEQC state, since this
540 * might be someone with a motorized dish controlled by DISEQC.
541 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
542 if (fepriv->state & FESTATE_DISEQC) {
543 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
544 return;
545 }
546
547 /* if we're in the RETUNE state, set everything up for a brand
548 * new scan, keeping the current inversion setting, as the next
549 * tune is _very_ likely to require the same */
550 if (fepriv->state & FESTATE_RETUNE) {
551 fepriv->lnb_drift = 0;
552 fepriv->auto_step = 0;
553 fepriv->auto_sub_step = 0;
554 fepriv->started_auto_step = 0;
555 fepriv->check_wrapped = 0;
556 }
557
558 /* fast zigzag. */
559 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
560 fepriv->delay = fepriv->min_delay;
561
562 /* perform a tune */
563 retval = dvb_frontend_swzigzag_autotune(fe,
564 fepriv->check_wrapped);
565 if (retval < 0) {
566 return;
567 } else if (retval) {
568 /* OK, if we've run out of trials at the fast speed.
569 * Drop back to slow for the _next_ attempt */
570 fepriv->state = FESTATE_SEARCHING_SLOW;
571 fepriv->started_auto_step = fepriv->auto_step;
572 return;
573 }
574 fepriv->check_wrapped = 1;
575
576 /* if we've just retuned, enter the ZIGZAG_FAST state.
577 * This ensures we cannot return from an
578 * FE_SET_FRONTEND ioctl before the first frontend tune
579 * occurs */
580 if (fepriv->state & FESTATE_RETUNE) {
581 fepriv->state = FESTATE_TUNING_FAST;
582 }
583 }
584
585 /* slow zigzag */
586 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
587 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
588
589 /* Note: don't bother checking for wrapping; we stay in this
590 * state until we get a lock */
591 dvb_frontend_swzigzag_autotune(fe, 0);
592 }
593 }
594
595 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
596 {
597 struct dvb_frontend_private *fepriv = fe->frontend_priv;
598
599 if (fe->exit != DVB_FE_NO_EXIT)
600 return 1;
601
602 if (fepriv->dvbdev->writers == 1)
603 if (time_after_eq(jiffies, fepriv->release_jiffies +
604 dvb_shutdown_timeout * HZ))
605 return 1;
606
607 return 0;
608 }
609
610 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
611 {
612 struct dvb_frontend_private *fepriv = fe->frontend_priv;
613
614 if (fepriv->wakeup) {
615 fepriv->wakeup = 0;
616 return 1;
617 }
618 return dvb_frontend_is_exiting(fe);
619 }
620
621 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
622 {
623 struct dvb_frontend_private *fepriv = fe->frontend_priv;
624
625 fepriv->wakeup = 1;
626 wake_up_interruptible(&fepriv->wait_queue);
627 }
628
629 static int dvb_frontend_thread(void *data)
630 {
631 struct dvb_frontend *fe = data;
632 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
633 struct dvb_frontend_private *fepriv = fe->frontend_priv;
634 enum fe_status s = FE_NONE;
635 enum dvbfe_algo algo;
636 bool re_tune = false;
637 bool semheld = false;
638
639 dev_dbg(fe->dvb->device, "%s:\n", __func__);
640
641 fepriv->check_wrapped = 0;
642 fepriv->quality = 0;
643 fepriv->delay = 3*HZ;
644 fepriv->status = 0;
645 fepriv->wakeup = 0;
646 fepriv->reinitialise = 0;
647
648 dvb_frontend_init(fe);
649
650 set_freezable();
651 while (1) {
652 up(&fepriv->sem); /* is locked when we enter the thread... */
653 restart:
654 wait_event_interruptible_timeout(fepriv->wait_queue,
655 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
656 || freezing(current),
657 fepriv->delay);
658
659 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
660 /* got signal or quitting */
661 if (!down_interruptible(&fepriv->sem))
662 semheld = true;
663 fe->exit = DVB_FE_NORMAL_EXIT;
664 break;
665 }
666
667 if (try_to_freeze())
668 goto restart;
669
670 if (down_interruptible(&fepriv->sem))
671 break;
672
673 if (fepriv->reinitialise) {
674 dvb_frontend_init(fe);
675 if (fe->ops.set_tone && fepriv->tone != -1)
676 fe->ops.set_tone(fe, fepriv->tone);
677 if (fe->ops.set_voltage && fepriv->voltage != -1)
678 fe->ops.set_voltage(fe, fepriv->voltage);
679 fepriv->reinitialise = 0;
680 }
681
682 /* do an iteration of the tuning loop */
683 if (fe->ops.get_frontend_algo) {
684 algo = fe->ops.get_frontend_algo(fe);
685 switch (algo) {
686 case DVBFE_ALGO_HW:
687 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
688
689 if (fepriv->state & FESTATE_RETUNE) {
690 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
691 re_tune = true;
692 fepriv->state = FESTATE_TUNED;
693 } else {
694 re_tune = false;
695 }
696
697 if (fe->ops.tune)
698 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
699
700 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
701 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
702 dvb_frontend_add_event(fe, s);
703 fepriv->status = s;
704 }
705 break;
706 case DVBFE_ALGO_SW:
707 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
708 dvb_frontend_swzigzag(fe);
709 break;
710 case DVBFE_ALGO_CUSTOM:
711 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
712 if (fepriv->state & FESTATE_RETUNE) {
713 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
714 fepriv->state = FESTATE_TUNED;
715 }
716 /* Case where we are going to search for a carrier
717 * User asked us to retune again for some reason, possibly
718 * requesting a search with a new set of parameters
719 */
720 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
721 if (fe->ops.search) {
722 fepriv->algo_status = fe->ops.search(fe);
723 /* We did do a search as was requested, the flags are
724 * now unset as well and has the flags wrt to search.
725 */
726 } else {
727 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
728 }
729 }
730 /* Track the carrier if the search was successful */
731 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
732 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
733 fepriv->delay = HZ / 2;
734 }
735 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
736 fe->ops.read_status(fe, &s);
737 if (s != fepriv->status) {
738 dvb_frontend_add_event(fe, s); /* update event list */
739 fepriv->status = s;
740 if (!(s & FE_HAS_LOCK)) {
741 fepriv->delay = HZ / 10;
742 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
743 } else {
744 fepriv->delay = 60 * HZ;
745 }
746 }
747 break;
748 default:
749 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
750 break;
751 }
752 } else {
753 dvb_frontend_swzigzag(fe);
754 }
755 }
756
757 if (dvb_powerdown_on_sleep) {
758 if (fe->ops.set_voltage)
759 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
760 if (fe->ops.tuner_ops.sleep) {
761 if (fe->ops.i2c_gate_ctrl)
762 fe->ops.i2c_gate_ctrl(fe, 1);
763 fe->ops.tuner_ops.sleep(fe);
764 if (fe->ops.i2c_gate_ctrl)
765 fe->ops.i2c_gate_ctrl(fe, 0);
766 }
767 if (fe->ops.sleep)
768 fe->ops.sleep(fe);
769 }
770
771 fepriv->thread = NULL;
772 if (kthread_should_stop())
773 fe->exit = DVB_FE_DEVICE_REMOVED;
774 else
775 fe->exit = DVB_FE_NO_EXIT;
776 mb();
777
778 if (semheld)
779 up(&fepriv->sem);
780 dvb_frontend_wakeup(fe);
781 return 0;
782 }
783
784 static void dvb_frontend_stop(struct dvb_frontend *fe)
785 {
786 struct dvb_frontend_private *fepriv = fe->frontend_priv;
787
788 dev_dbg(fe->dvb->device, "%s:\n", __func__);
789
790 if (fe->exit != DVB_FE_DEVICE_REMOVED)
791 fe->exit = DVB_FE_NORMAL_EXIT;
792 mb();
793
794 if (!fepriv->thread)
795 return;
796
797 kthread_stop(fepriv->thread);
798
799 sema_init(&fepriv->sem, 1);
800 fepriv->state = FESTATE_IDLE;
801
802 /* paranoia check in case a signal arrived */
803 if (fepriv->thread)
804 dev_warn(fe->dvb->device,
805 "dvb_frontend_stop: warning: thread %p won't exit\n",
806 fepriv->thread);
807 }
808
809 /*
810 * Sleep for the amount of time given by add_usec parameter
811 *
812 * This needs to be as precise as possible, as it affects the detection of
813 * the dish tone command at the satellite subsystem. The precision is improved
814 * by using a scheduled msleep followed by udelay for the remainder.
815 */
816 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
817 {
818 s32 delta;
819
820 *waketime = ktime_add_us(*waketime, add_usec);
821 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
822 if (delta > 2500) {
823 msleep((delta - 1500) / 1000);
824 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
825 }
826 if (delta > 0)
827 udelay(delta);
828 }
829 EXPORT_SYMBOL(dvb_frontend_sleep_until);
830
831 static int dvb_frontend_start(struct dvb_frontend *fe)
832 {
833 int ret;
834 struct dvb_frontend_private *fepriv = fe->frontend_priv;
835 struct task_struct *fe_thread;
836
837 dev_dbg(fe->dvb->device, "%s:\n", __func__);
838
839 if (fepriv->thread) {
840 if (fe->exit == DVB_FE_NO_EXIT)
841 return 0;
842 else
843 dvb_frontend_stop (fe);
844 }
845
846 if (signal_pending(current))
847 return -EINTR;
848 if (down_interruptible (&fepriv->sem))
849 return -EINTR;
850
851 fepriv->state = FESTATE_IDLE;
852 fe->exit = DVB_FE_NO_EXIT;
853 fepriv->thread = NULL;
854 mb();
855
856 fe_thread = kthread_run(dvb_frontend_thread, fe,
857 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
858 if (IS_ERR(fe_thread)) {
859 ret = PTR_ERR(fe_thread);
860 dev_warn(fe->dvb->device,
861 "dvb_frontend_start: failed to start kthread (%d)\n",
862 ret);
863 up(&fepriv->sem);
864 return ret;
865 }
866 fepriv->thread = fe_thread;
867 return 0;
868 }
869
870 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
871 u32 *freq_min, u32 *freq_max)
872 {
873 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
874
875 if (fe->ops.info.frequency_max == 0)
876 *freq_max = fe->ops.tuner_ops.info.frequency_max;
877 else if (fe->ops.tuner_ops.info.frequency_max == 0)
878 *freq_max = fe->ops.info.frequency_max;
879 else
880 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
881
882 if (*freq_min == 0 || *freq_max == 0)
883 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
884 fe->dvb->num, fe->id);
885 }
886
887 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
888 {
889 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
890 u32 freq_min;
891 u32 freq_max;
892
893 /* range check: frequency */
894 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
895 if ((freq_min && c->frequency < freq_min) ||
896 (freq_max && c->frequency > freq_max)) {
897 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
898 fe->dvb->num, fe->id, c->frequency,
899 freq_min, freq_max);
900 return -EINVAL;
901 }
902
903 /* range check: symbol rate */
904 switch (c->delivery_system) {
905 case SYS_DVBS:
906 case SYS_DVBS2:
907 case SYS_TURBO:
908 case SYS_DVBC_ANNEX_A:
909 case SYS_DVBC_ANNEX_C:
910 if ((fe->ops.info.symbol_rate_min &&
911 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
912 (fe->ops.info.symbol_rate_max &&
913 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
914 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
915 fe->dvb->num, fe->id, c->symbol_rate,
916 fe->ops.info.symbol_rate_min,
917 fe->ops.info.symbol_rate_max);
918 return -EINVAL;
919 }
920 default:
921 break;
922 }
923
924 return 0;
925 }
926
927 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
928 {
929 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
930 int i;
931 u32 delsys;
932
933 delsys = c->delivery_system;
934 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
935 c->delivery_system = delsys;
936
937 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
938 __func__, c->delivery_system);
939
940 c->transmission_mode = TRANSMISSION_MODE_AUTO;
941 c->bandwidth_hz = 0; /* AUTO */
942 c->guard_interval = GUARD_INTERVAL_AUTO;
943 c->hierarchy = HIERARCHY_AUTO;
944 c->symbol_rate = 0;
945 c->code_rate_HP = FEC_AUTO;
946 c->code_rate_LP = FEC_AUTO;
947 c->fec_inner = FEC_AUTO;
948 c->rolloff = ROLLOFF_AUTO;
949 c->voltage = SEC_VOLTAGE_OFF;
950 c->sectone = SEC_TONE_OFF;
951 c->pilot = PILOT_AUTO;
952
953 c->isdbt_partial_reception = 0;
954 c->isdbt_sb_mode = 0;
955 c->isdbt_sb_subchannel = 0;
956 c->isdbt_sb_segment_idx = 0;
957 c->isdbt_sb_segment_count = 0;
958 c->isdbt_layer_enabled = 0;
959 for (i = 0; i < 3; i++) {
960 c->layer[i].fec = FEC_AUTO;
961 c->layer[i].modulation = QAM_AUTO;
962 c->layer[i].interleaving = 0;
963 c->layer[i].segment_count = 0;
964 }
965
966 c->stream_id = NO_STREAM_ID_FILTER;
967
968 switch (c->delivery_system) {
969 case SYS_DVBS:
970 case SYS_DVBS2:
971 case SYS_TURBO:
972 c->modulation = QPSK; /* implied for DVB-S in legacy API */
973 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
974 break;
975 case SYS_ATSC:
976 c->modulation = VSB_8;
977 break;
978 case SYS_ISDBS:
979 c->symbol_rate = 28860000;
980 c->rolloff = ROLLOFF_35;
981 c->bandwidth_hz = c->symbol_rate / 100 * 135;
982 break;
983 default:
984 c->modulation = QAM_AUTO;
985 break;
986 }
987
988 c->lna = LNA_AUTO;
989
990 return 0;
991 }
992
993 #define _DTV_CMD(n, s, b) \
994 [n] = { \
995 .name = #n, \
996 .cmd = n, \
997 .set = s,\
998 .buffer = b \
999 }
1000
1001 struct dtv_cmds_h {
1002 char *name; /* A display name for debugging purposes */
1003
1004 __u32 cmd; /* A unique ID */
1005
1006 /* Flags */
1007 __u32 set:1; /* Either a set or get property */
1008 __u32 buffer:1; /* Does this property use the buffer? */
1009 __u32 reserved:30; /* Align */
1010 };
1011
1012 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1013 _DTV_CMD(DTV_TUNE, 1, 0),
1014 _DTV_CMD(DTV_CLEAR, 1, 0),
1015
1016 /* Set */
1017 _DTV_CMD(DTV_FREQUENCY, 1, 0),
1018 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1019 _DTV_CMD(DTV_MODULATION, 1, 0),
1020 _DTV_CMD(DTV_INVERSION, 1, 0),
1021 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1022 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1023 _DTV_CMD(DTV_INNER_FEC, 1, 0),
1024 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1025 _DTV_CMD(DTV_TONE, 1, 0),
1026 _DTV_CMD(DTV_PILOT, 1, 0),
1027 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1028 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1029 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1030 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1031 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1032 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1033 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1034 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1035
1036 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1037 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1038 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1039 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1040 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1041 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1042 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1043 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1044 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1045 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1046 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1047 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1048 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1049 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1050 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1051 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1052 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1053 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1054
1055 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1056 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1057 _DTV_CMD(DTV_LNA, 1, 0),
1058
1059 /* Get */
1060 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1061 _DTV_CMD(DTV_API_VERSION, 0, 0),
1062
1063 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1064
1065 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1066 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1067
1068 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1069 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1070 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1071 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1072 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1073 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1074 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1075 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1076 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1077 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1078 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1079 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1080 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1081
1082 /* Statistics API */
1083 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1084 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1085 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1086 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1087 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1088 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1089 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1090 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1091 };
1092
1093 static void dtv_property_dump(struct dvb_frontend *fe,
1094 bool is_set,
1095 struct dtv_property *tvp)
1096 {
1097 int i;
1098
1099 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1100 dev_warn(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x undefined\n",
1101 __func__,
1102 is_set ? "SET" : "GET",
1103 tvp->cmd);
1104 return;
1105 }
1106
1107 dev_dbg(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x (%s)\n", __func__,
1108 is_set ? "SET" : "GET",
1109 tvp->cmd,
1110 dtv_cmds[tvp->cmd].name);
1111
1112 if (dtv_cmds[tvp->cmd].buffer) {
1113 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1114 __func__, tvp->u.buffer.len);
1115
1116 for(i = 0; i < tvp->u.buffer.len; i++)
1117 dev_dbg(fe->dvb->device,
1118 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1119 __func__, i, tvp->u.buffer.data[i]);
1120 } else {
1121 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1122 tvp->u.data);
1123 }
1124 }
1125
1126 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1127 * drivers can use a single set_frontend tuning function, regardless of whether
1128 * it's being used for the legacy or new API, reducing code and complexity.
1129 */
1130 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1131 struct dtv_frontend_properties *c,
1132 const struct dvb_frontend_parameters *p)
1133 {
1134 c->frequency = p->frequency;
1135 c->inversion = p->inversion;
1136
1137 switch (dvbv3_type(c->delivery_system)) {
1138 case DVBV3_QPSK:
1139 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1140 c->symbol_rate = p->u.qpsk.symbol_rate;
1141 c->fec_inner = p->u.qpsk.fec_inner;
1142 break;
1143 case DVBV3_QAM:
1144 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1145 c->symbol_rate = p->u.qam.symbol_rate;
1146 c->fec_inner = p->u.qam.fec_inner;
1147 c->modulation = p->u.qam.modulation;
1148 break;
1149 case DVBV3_OFDM:
1150 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1151
1152 switch (p->u.ofdm.bandwidth) {
1153 case BANDWIDTH_10_MHZ:
1154 c->bandwidth_hz = 10000000;
1155 break;
1156 case BANDWIDTH_8_MHZ:
1157 c->bandwidth_hz = 8000000;
1158 break;
1159 case BANDWIDTH_7_MHZ:
1160 c->bandwidth_hz = 7000000;
1161 break;
1162 case BANDWIDTH_6_MHZ:
1163 c->bandwidth_hz = 6000000;
1164 break;
1165 case BANDWIDTH_5_MHZ:
1166 c->bandwidth_hz = 5000000;
1167 break;
1168 case BANDWIDTH_1_712_MHZ:
1169 c->bandwidth_hz = 1712000;
1170 break;
1171 case BANDWIDTH_AUTO:
1172 c->bandwidth_hz = 0;
1173 }
1174
1175 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1176 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1177 c->modulation = p->u.ofdm.constellation;
1178 c->transmission_mode = p->u.ofdm.transmission_mode;
1179 c->guard_interval = p->u.ofdm.guard_interval;
1180 c->hierarchy = p->u.ofdm.hierarchy_information;
1181 break;
1182 case DVBV3_ATSC:
1183 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1184 c->modulation = p->u.vsb.modulation;
1185 if (c->delivery_system == SYS_ATSCMH)
1186 break;
1187 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1188 c->delivery_system = SYS_ATSC;
1189 else
1190 c->delivery_system = SYS_DVBC_ANNEX_B;
1191 break;
1192 case DVBV3_UNKNOWN:
1193 dev_err(fe->dvb->device,
1194 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1195 __func__, c->delivery_system);
1196 return -EINVAL;
1197 }
1198
1199 return 0;
1200 }
1201
1202 /* Ensure the cached values are set correctly in the frontend
1203 * legacy tuning structures, for the advanced tuning API.
1204 */
1205 static int
1206 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1207 const struct dtv_frontend_properties *c,
1208 struct dvb_frontend_parameters *p)
1209 {
1210 p->frequency = c->frequency;
1211 p->inversion = c->inversion;
1212
1213 switch (dvbv3_type(c->delivery_system)) {
1214 case DVBV3_UNKNOWN:
1215 dev_err(fe->dvb->device,
1216 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1217 __func__, c->delivery_system);
1218 return -EINVAL;
1219 case DVBV3_QPSK:
1220 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1221 p->u.qpsk.symbol_rate = c->symbol_rate;
1222 p->u.qpsk.fec_inner = c->fec_inner;
1223 break;
1224 case DVBV3_QAM:
1225 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1226 p->u.qam.symbol_rate = c->symbol_rate;
1227 p->u.qam.fec_inner = c->fec_inner;
1228 p->u.qam.modulation = c->modulation;
1229 break;
1230 case DVBV3_OFDM:
1231 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1232 switch (c->bandwidth_hz) {
1233 case 10000000:
1234 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1235 break;
1236 case 8000000:
1237 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1238 break;
1239 case 7000000:
1240 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1241 break;
1242 case 6000000:
1243 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1244 break;
1245 case 5000000:
1246 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1247 break;
1248 case 1712000:
1249 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1250 break;
1251 case 0:
1252 default:
1253 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1254 }
1255 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1256 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1257 p->u.ofdm.constellation = c->modulation;
1258 p->u.ofdm.transmission_mode = c->transmission_mode;
1259 p->u.ofdm.guard_interval = c->guard_interval;
1260 p->u.ofdm.hierarchy_information = c->hierarchy;
1261 break;
1262 case DVBV3_ATSC:
1263 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1264 p->u.vsb.modulation = c->modulation;
1265 break;
1266 }
1267 return 0;
1268 }
1269
1270 /**
1271 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1272 * @fe: struct dvb_frontend pointer
1273 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1274 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1275 *
1276 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1277 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1278 * If p_out is not null, it will update the DVBv3 params pointed by it.
1279 */
1280 static int dtv_get_frontend(struct dvb_frontend *fe,
1281 struct dtv_frontend_properties *c,
1282 struct dvb_frontend_parameters *p_out)
1283 {
1284 int r;
1285
1286 if (fe->ops.get_frontend) {
1287 r = fe->ops.get_frontend(fe, c);
1288 if (unlikely(r < 0))
1289 return r;
1290 if (p_out)
1291 dtv_property_legacy_params_sync(fe, c, p_out);
1292 return 0;
1293 }
1294
1295 /* As everything is in cache, get_frontend fops are always supported */
1296 return 0;
1297 }
1298
1299 static int dvb_frontend_handle_ioctl(struct file *file,
1300 unsigned int cmd, void *parg);
1301
1302 static int dtv_property_process_get(struct dvb_frontend *fe,
1303 const struct dtv_frontend_properties *c,
1304 struct dtv_property *tvp,
1305 struct file *file)
1306 {
1307 int ncaps;
1308
1309 switch(tvp->cmd) {
1310 case DTV_ENUM_DELSYS:
1311 ncaps = 0;
1312 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1313 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1314 ncaps++;
1315 }
1316 tvp->u.buffer.len = ncaps;
1317 break;
1318 case DTV_FREQUENCY:
1319 tvp->u.data = c->frequency;
1320 break;
1321 case DTV_MODULATION:
1322 tvp->u.data = c->modulation;
1323 break;
1324 case DTV_BANDWIDTH_HZ:
1325 tvp->u.data = c->bandwidth_hz;
1326 break;
1327 case DTV_INVERSION:
1328 tvp->u.data = c->inversion;
1329 break;
1330 case DTV_SYMBOL_RATE:
1331 tvp->u.data = c->symbol_rate;
1332 break;
1333 case DTV_INNER_FEC:
1334 tvp->u.data = c->fec_inner;
1335 break;
1336 case DTV_PILOT:
1337 tvp->u.data = c->pilot;
1338 break;
1339 case DTV_ROLLOFF:
1340 tvp->u.data = c->rolloff;
1341 break;
1342 case DTV_DELIVERY_SYSTEM:
1343 tvp->u.data = c->delivery_system;
1344 break;
1345 case DTV_VOLTAGE:
1346 tvp->u.data = c->voltage;
1347 break;
1348 case DTV_TONE:
1349 tvp->u.data = c->sectone;
1350 break;
1351 case DTV_API_VERSION:
1352 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1353 break;
1354 case DTV_CODE_RATE_HP:
1355 tvp->u.data = c->code_rate_HP;
1356 break;
1357 case DTV_CODE_RATE_LP:
1358 tvp->u.data = c->code_rate_LP;
1359 break;
1360 case DTV_GUARD_INTERVAL:
1361 tvp->u.data = c->guard_interval;
1362 break;
1363 case DTV_TRANSMISSION_MODE:
1364 tvp->u.data = c->transmission_mode;
1365 break;
1366 case DTV_HIERARCHY:
1367 tvp->u.data = c->hierarchy;
1368 break;
1369 case DTV_INTERLEAVING:
1370 tvp->u.data = c->interleaving;
1371 break;
1372
1373 /* ISDB-T Support here */
1374 case DTV_ISDBT_PARTIAL_RECEPTION:
1375 tvp->u.data = c->isdbt_partial_reception;
1376 break;
1377 case DTV_ISDBT_SOUND_BROADCASTING:
1378 tvp->u.data = c->isdbt_sb_mode;
1379 break;
1380 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1381 tvp->u.data = c->isdbt_sb_subchannel;
1382 break;
1383 case DTV_ISDBT_SB_SEGMENT_IDX:
1384 tvp->u.data = c->isdbt_sb_segment_idx;
1385 break;
1386 case DTV_ISDBT_SB_SEGMENT_COUNT:
1387 tvp->u.data = c->isdbt_sb_segment_count;
1388 break;
1389 case DTV_ISDBT_LAYER_ENABLED:
1390 tvp->u.data = c->isdbt_layer_enabled;
1391 break;
1392 case DTV_ISDBT_LAYERA_FEC:
1393 tvp->u.data = c->layer[0].fec;
1394 break;
1395 case DTV_ISDBT_LAYERA_MODULATION:
1396 tvp->u.data = c->layer[0].modulation;
1397 break;
1398 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1399 tvp->u.data = c->layer[0].segment_count;
1400 break;
1401 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1402 tvp->u.data = c->layer[0].interleaving;
1403 break;
1404 case DTV_ISDBT_LAYERB_FEC:
1405 tvp->u.data = c->layer[1].fec;
1406 break;
1407 case DTV_ISDBT_LAYERB_MODULATION:
1408 tvp->u.data = c->layer[1].modulation;
1409 break;
1410 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1411 tvp->u.data = c->layer[1].segment_count;
1412 break;
1413 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1414 tvp->u.data = c->layer[1].interleaving;
1415 break;
1416 case DTV_ISDBT_LAYERC_FEC:
1417 tvp->u.data = c->layer[2].fec;
1418 break;
1419 case DTV_ISDBT_LAYERC_MODULATION:
1420 tvp->u.data = c->layer[2].modulation;
1421 break;
1422 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1423 tvp->u.data = c->layer[2].segment_count;
1424 break;
1425 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1426 tvp->u.data = c->layer[2].interleaving;
1427 break;
1428
1429 /* Multistream support */
1430 case DTV_STREAM_ID:
1431 case DTV_DVBT2_PLP_ID_LEGACY:
1432 tvp->u.data = c->stream_id;
1433 break;
1434
1435 /* ATSC-MH */
1436 case DTV_ATSCMH_FIC_VER:
1437 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1438 break;
1439 case DTV_ATSCMH_PARADE_ID:
1440 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1441 break;
1442 case DTV_ATSCMH_NOG:
1443 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1444 break;
1445 case DTV_ATSCMH_TNOG:
1446 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1447 break;
1448 case DTV_ATSCMH_SGN:
1449 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1450 break;
1451 case DTV_ATSCMH_PRC:
1452 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1453 break;
1454 case DTV_ATSCMH_RS_FRAME_MODE:
1455 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1456 break;
1457 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1458 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1459 break;
1460 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1461 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1462 break;
1463 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1464 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1465 break;
1466 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1467 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1468 break;
1469 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1470 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1471 break;
1472 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1473 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1474 break;
1475 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1476 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1477 break;
1478 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1479 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1480 break;
1481
1482 case DTV_LNA:
1483 tvp->u.data = c->lna;
1484 break;
1485
1486 /* Fill quality measures */
1487 case DTV_STAT_SIGNAL_STRENGTH:
1488 tvp->u.st = c->strength;
1489 break;
1490 case DTV_STAT_CNR:
1491 tvp->u.st = c->cnr;
1492 break;
1493 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1494 tvp->u.st = c->pre_bit_error;
1495 break;
1496 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1497 tvp->u.st = c->pre_bit_count;
1498 break;
1499 case DTV_STAT_POST_ERROR_BIT_COUNT:
1500 tvp->u.st = c->post_bit_error;
1501 break;
1502 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1503 tvp->u.st = c->post_bit_count;
1504 break;
1505 case DTV_STAT_ERROR_BLOCK_COUNT:
1506 tvp->u.st = c->block_error;
1507 break;
1508 case DTV_STAT_TOTAL_BLOCK_COUNT:
1509 tvp->u.st = c->block_count;
1510 break;
1511 default:
1512 dev_dbg(fe->dvb->device,
1513 "%s: FE property %d doesn't exist\n",
1514 __func__, tvp->cmd);
1515 return -EINVAL;
1516 }
1517
1518 dtv_property_dump(fe, false, tvp);
1519
1520 return 0;
1521 }
1522
1523 static int dtv_set_frontend(struct dvb_frontend *fe);
1524
1525 static bool is_dvbv3_delsys(u32 delsys)
1526 {
1527 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1528 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1529 }
1530
1531 /**
1532 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1533 * @fe: struct frontend;
1534 * @delsys: DVBv5 type that will be used for emulation
1535 *
1536 * Provides emulation for delivery systems that are compatible with the old
1537 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1538 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1539 * parameters are compatible with DVB-S spec.
1540 */
1541 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1542 {
1543 int i;
1544 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1545
1546 c->delivery_system = delsys;
1547
1548 /*
1549 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1550 */
1551 if (c->delivery_system == SYS_ISDBT) {
1552 dev_dbg(fe->dvb->device,
1553 "%s: Using defaults for SYS_ISDBT\n",
1554 __func__);
1555
1556 if (!c->bandwidth_hz)
1557 c->bandwidth_hz = 6000000;
1558
1559 c->isdbt_partial_reception = 0;
1560 c->isdbt_sb_mode = 0;
1561 c->isdbt_sb_subchannel = 0;
1562 c->isdbt_sb_segment_idx = 0;
1563 c->isdbt_sb_segment_count = 0;
1564 c->isdbt_layer_enabled = 7;
1565 for (i = 0; i < 3; i++) {
1566 c->layer[i].fec = FEC_AUTO;
1567 c->layer[i].modulation = QAM_AUTO;
1568 c->layer[i].interleaving = 0;
1569 c->layer[i].segment_count = 0;
1570 }
1571 }
1572 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1573 __func__, c->delivery_system);
1574
1575 return 0;
1576 }
1577
1578 /**
1579 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1580 * @fe: frontend struct
1581 * @desired_system: delivery system requested by the user
1582 *
1583 * A DVBv5 call know what's the desired system it wants. So, set it.
1584 *
1585 * There are, however, a few known issues with early DVBv5 applications that
1586 * are also handled by this logic:
1587 *
1588 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1589 * This is an API violation, but, as we don't want to break userspace,
1590 * convert it to the first supported delivery system.
1591 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1592 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1593 * ISDB-T provided backward compat with DVB-T.
1594 */
1595 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1596 u32 desired_system)
1597 {
1598 int ncaps;
1599 u32 delsys = SYS_UNDEFINED;
1600 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1601 enum dvbv3_emulation_type type;
1602
1603 /*
1604 * It was reported that some old DVBv5 applications were
1605 * filling delivery_system with SYS_UNDEFINED. If this happens,
1606 * assume that the application wants to use the first supported
1607 * delivery system.
1608 */
1609 if (desired_system == SYS_UNDEFINED)
1610 desired_system = fe->ops.delsys[0];
1611
1612 /*
1613 * This is a DVBv5 call. So, it likely knows the supported
1614 * delivery systems. So, check if the desired delivery system is
1615 * supported
1616 */
1617 ncaps = 0;
1618 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1619 if (fe->ops.delsys[ncaps] == desired_system) {
1620 c->delivery_system = desired_system;
1621 dev_dbg(fe->dvb->device,
1622 "%s: Changing delivery system to %d\n",
1623 __func__, desired_system);
1624 return 0;
1625 }
1626 ncaps++;
1627 }
1628
1629 /*
1630 * The requested delivery system isn't supported. Maybe userspace
1631 * is requesting a DVBv3 compatible delivery system.
1632 *
1633 * The emulation only works if the desired system is one of the
1634 * delivery systems supported by DVBv3 API
1635 */
1636 if (!is_dvbv3_delsys(desired_system)) {
1637 dev_dbg(fe->dvb->device,
1638 "%s: Delivery system %d not supported.\n",
1639 __func__, desired_system);
1640 return -EINVAL;
1641 }
1642
1643 type = dvbv3_type(desired_system);
1644
1645 /*
1646 * Get the last non-DVBv3 delivery system that has the same type
1647 * of the desired system
1648 */
1649 ncaps = 0;
1650 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1651 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1652 delsys = fe->ops.delsys[ncaps];
1653 ncaps++;
1654 }
1655
1656 /* There's nothing compatible with the desired delivery system */
1657 if (delsys == SYS_UNDEFINED) {
1658 dev_dbg(fe->dvb->device,
1659 "%s: Delivery system %d not supported on emulation mode.\n",
1660 __func__, desired_system);
1661 return -EINVAL;
1662 }
1663
1664 dev_dbg(fe->dvb->device,
1665 "%s: Using delivery system %d emulated as if it were %d\n",
1666 __func__, delsys, desired_system);
1667
1668 return emulate_delivery_system(fe, desired_system);
1669 }
1670
1671 /**
1672 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1673 * @fe: frontend struct
1674 *
1675 * A DVBv3 call doesn't know what's the desired system it wants. It also
1676 * doesn't allow to switch between different types. Due to that, userspace
1677 * should use DVBv5 instead.
1678 * However, in order to avoid breaking userspace API, limited backward
1679 * compatibility support is provided.
1680 *
1681 * There are some delivery systems that are incompatible with DVBv3 calls.
1682 *
1683 * This routine should work fine for frontends that support just one delivery
1684 * system.
1685 *
1686 * For frontends that support multiple frontends:
1687 * 1) It defaults to use the first supported delivery system. There's an
1688 * userspace application that allows changing it at runtime;
1689 *
1690 * 2) If the current delivery system is not compatible with DVBv3, it gets
1691 * the first one that it is compatible.
1692 *
1693 * NOTE: in order for this to work with applications like Kaffeine that
1694 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1695 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1696 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1697 * to DVB-S.
1698 */
1699 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1700 {
1701 int ncaps;
1702 u32 delsys = SYS_UNDEFINED;
1703 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1704
1705 /* If not set yet, defaults to the first supported delivery system */
1706 if (c->delivery_system == SYS_UNDEFINED)
1707 c->delivery_system = fe->ops.delsys[0];
1708
1709 /*
1710 * Trivial case: just use the current one, if it already a DVBv3
1711 * delivery system
1712 */
1713 if (is_dvbv3_delsys(c->delivery_system)) {
1714 dev_dbg(fe->dvb->device,
1715 "%s: Using delivery system to %d\n",
1716 __func__, c->delivery_system);
1717 return 0;
1718 }
1719
1720 /*
1721 * Seek for the first delivery system that it is compatible with a
1722 * DVBv3 standard
1723 */
1724 ncaps = 0;
1725 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1726 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1727 delsys = fe->ops.delsys[ncaps];
1728 break;
1729 }
1730 ncaps++;
1731 }
1732 if (delsys == SYS_UNDEFINED) {
1733 dev_dbg(fe->dvb->device,
1734 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1735 __func__);
1736 return -EINVAL;
1737 }
1738 return emulate_delivery_system(fe, delsys);
1739 }
1740
1741 static int dtv_property_process_set(struct dvb_frontend *fe,
1742 struct dtv_property *tvp,
1743 struct file *file)
1744 {
1745 int r = 0;
1746 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1747
1748 dtv_property_dump(fe, true, tvp);
1749
1750 switch(tvp->cmd) {
1751 case DTV_CLEAR:
1752 /*
1753 * Reset a cache of data specific to the frontend here. This does
1754 * not effect hardware.
1755 */
1756 dvb_frontend_clear_cache(fe);
1757 break;
1758 case DTV_TUNE:
1759 /*
1760 * Use the cached Digital TV properties to tune the
1761 * frontend
1762 */
1763 dev_dbg(fe->dvb->device,
1764 "%s: Setting the frontend from property cache\n",
1765 __func__);
1766
1767 r = dtv_set_frontend(fe);
1768 break;
1769 case DTV_FREQUENCY:
1770 c->frequency = tvp->u.data;
1771 break;
1772 case DTV_MODULATION:
1773 c->modulation = tvp->u.data;
1774 break;
1775 case DTV_BANDWIDTH_HZ:
1776 c->bandwidth_hz = tvp->u.data;
1777 break;
1778 case DTV_INVERSION:
1779 c->inversion = tvp->u.data;
1780 break;
1781 case DTV_SYMBOL_RATE:
1782 c->symbol_rate = tvp->u.data;
1783 break;
1784 case DTV_INNER_FEC:
1785 c->fec_inner = tvp->u.data;
1786 break;
1787 case DTV_PILOT:
1788 c->pilot = tvp->u.data;
1789 break;
1790 case DTV_ROLLOFF:
1791 c->rolloff = tvp->u.data;
1792 break;
1793 case DTV_DELIVERY_SYSTEM:
1794 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1795 break;
1796 case DTV_VOLTAGE:
1797 c->voltage = tvp->u.data;
1798 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
1799 (void *)c->voltage);
1800 break;
1801 case DTV_TONE:
1802 c->sectone = tvp->u.data;
1803 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
1804 (void *)c->sectone);
1805 break;
1806 case DTV_CODE_RATE_HP:
1807 c->code_rate_HP = tvp->u.data;
1808 break;
1809 case DTV_CODE_RATE_LP:
1810 c->code_rate_LP = tvp->u.data;
1811 break;
1812 case DTV_GUARD_INTERVAL:
1813 c->guard_interval = tvp->u.data;
1814 break;
1815 case DTV_TRANSMISSION_MODE:
1816 c->transmission_mode = tvp->u.data;
1817 break;
1818 case DTV_HIERARCHY:
1819 c->hierarchy = tvp->u.data;
1820 break;
1821 case DTV_INTERLEAVING:
1822 c->interleaving = tvp->u.data;
1823 break;
1824
1825 /* ISDB-T Support here */
1826 case DTV_ISDBT_PARTIAL_RECEPTION:
1827 c->isdbt_partial_reception = tvp->u.data;
1828 break;
1829 case DTV_ISDBT_SOUND_BROADCASTING:
1830 c->isdbt_sb_mode = tvp->u.data;
1831 break;
1832 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1833 c->isdbt_sb_subchannel = tvp->u.data;
1834 break;
1835 case DTV_ISDBT_SB_SEGMENT_IDX:
1836 c->isdbt_sb_segment_idx = tvp->u.data;
1837 break;
1838 case DTV_ISDBT_SB_SEGMENT_COUNT:
1839 c->isdbt_sb_segment_count = tvp->u.data;
1840 break;
1841 case DTV_ISDBT_LAYER_ENABLED:
1842 c->isdbt_layer_enabled = tvp->u.data;
1843 break;
1844 case DTV_ISDBT_LAYERA_FEC:
1845 c->layer[0].fec = tvp->u.data;
1846 break;
1847 case DTV_ISDBT_LAYERA_MODULATION:
1848 c->layer[0].modulation = tvp->u.data;
1849 break;
1850 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1851 c->layer[0].segment_count = tvp->u.data;
1852 break;
1853 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1854 c->layer[0].interleaving = tvp->u.data;
1855 break;
1856 case DTV_ISDBT_LAYERB_FEC:
1857 c->layer[1].fec = tvp->u.data;
1858 break;
1859 case DTV_ISDBT_LAYERB_MODULATION:
1860 c->layer[1].modulation = tvp->u.data;
1861 break;
1862 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1863 c->layer[1].segment_count = tvp->u.data;
1864 break;
1865 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1866 c->layer[1].interleaving = tvp->u.data;
1867 break;
1868 case DTV_ISDBT_LAYERC_FEC:
1869 c->layer[2].fec = tvp->u.data;
1870 break;
1871 case DTV_ISDBT_LAYERC_MODULATION:
1872 c->layer[2].modulation = tvp->u.data;
1873 break;
1874 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1875 c->layer[2].segment_count = tvp->u.data;
1876 break;
1877 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1878 c->layer[2].interleaving = tvp->u.data;
1879 break;
1880
1881 /* Multistream support */
1882 case DTV_STREAM_ID:
1883 case DTV_DVBT2_PLP_ID_LEGACY:
1884 c->stream_id = tvp->u.data;
1885 break;
1886
1887 /* ATSC-MH */
1888 case DTV_ATSCMH_PARADE_ID:
1889 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1890 break;
1891 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1892 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1893 break;
1894
1895 case DTV_LNA:
1896 c->lna = tvp->u.data;
1897 if (fe->ops.set_lna)
1898 r = fe->ops.set_lna(fe);
1899 if (r < 0)
1900 c->lna = LNA_AUTO;
1901 break;
1902
1903 default:
1904 return -EINVAL;
1905 }
1906
1907 return r;
1908 }
1909
1910 static int dvb_frontend_ioctl(struct file *file, unsigned int cmd, void *parg)
1911 {
1912 struct dvb_device *dvbdev = file->private_data;
1913 struct dvb_frontend *fe = dvbdev->priv;
1914 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1915 int err;
1916
1917 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1918 if (down_interruptible(&fepriv->sem))
1919 return -ERESTARTSYS;
1920
1921 if (fe->exit != DVB_FE_NO_EXIT) {
1922 up(&fepriv->sem);
1923 return -ENODEV;
1924 }
1925
1926 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1927 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1928 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1929 up(&fepriv->sem);
1930 return -EPERM;
1931 }
1932
1933 err = dvb_frontend_handle_ioctl(file, cmd, parg);
1934
1935 up(&fepriv->sem);
1936 return err;
1937 }
1938
1939 static int dtv_set_frontend(struct dvb_frontend *fe)
1940 {
1941 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1942 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1943 struct dvb_frontend_tune_settings fetunesettings;
1944 u32 rolloff = 0;
1945
1946 if (dvb_frontend_check_parameters(fe) < 0)
1947 return -EINVAL;
1948
1949 /*
1950 * Initialize output parameters to match the values given by
1951 * the user. FE_SET_FRONTEND triggers an initial frontend event
1952 * with status = 0, which copies output parameters to userspace.
1953 */
1954 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
1955
1956 /*
1957 * Be sure that the bandwidth will be filled for all
1958 * non-satellite systems, as tuners need to know what
1959 * low pass/Nyquist half filter should be applied, in
1960 * order to avoid inter-channel noise.
1961 *
1962 * ISDB-T and DVB-T/T2 already sets bandwidth.
1963 * ATSC and DVB-C don't set, so, the core should fill it.
1964 *
1965 * On DVB-C Annex A and C, the bandwidth is a function of
1966 * the roll-off and symbol rate. Annex B defines different
1967 * roll-off factors depending on the modulation. Fortunately,
1968 * Annex B is only used with 6MHz, so there's no need to
1969 * calculate it.
1970 *
1971 * While not officially supported, a side effect of handling it at
1972 * the cache level is that a program could retrieve the bandwidth
1973 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1974 */
1975 switch (c->delivery_system) {
1976 case SYS_ATSC:
1977 case SYS_DVBC_ANNEX_B:
1978 c->bandwidth_hz = 6000000;
1979 break;
1980 case SYS_DVBC_ANNEX_A:
1981 rolloff = 115;
1982 break;
1983 case SYS_DVBC_ANNEX_C:
1984 rolloff = 113;
1985 break;
1986 case SYS_DVBS:
1987 case SYS_TURBO:
1988 case SYS_ISDBS:
1989 rolloff = 135;
1990 break;
1991 case SYS_DVBS2:
1992 switch (c->rolloff) {
1993 case ROLLOFF_20:
1994 rolloff = 120;
1995 break;
1996 case ROLLOFF_25:
1997 rolloff = 125;
1998 break;
1999 default:
2000 case ROLLOFF_35:
2001 rolloff = 135;
2002 }
2003 break;
2004 default:
2005 break;
2006 }
2007 if (rolloff)
2008 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2009
2010 /* force auto frequency inversion if requested */
2011 if (dvb_force_auto_inversion)
2012 c->inversion = INVERSION_AUTO;
2013
2014 /*
2015 * without hierarchical coding code_rate_LP is irrelevant,
2016 * so we tolerate the otherwise invalid FEC_NONE setting
2017 */
2018 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2019 c->code_rate_LP = FEC_AUTO;
2020
2021 /* get frontend-specific tuning settings */
2022 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2023 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2024 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2025 fepriv->max_drift = fetunesettings.max_drift;
2026 fepriv->step_size = fetunesettings.step_size;
2027 } else {
2028 /* default values */
2029 switch (c->delivery_system) {
2030 case SYS_DVBS:
2031 case SYS_DVBS2:
2032 case SYS_ISDBS:
2033 case SYS_TURBO:
2034 case SYS_DVBC_ANNEX_A:
2035 case SYS_DVBC_ANNEX_C:
2036 fepriv->min_delay = HZ / 20;
2037 fepriv->step_size = c->symbol_rate / 16000;
2038 fepriv->max_drift = c->symbol_rate / 2000;
2039 break;
2040 case SYS_DVBT:
2041 case SYS_DVBT2:
2042 case SYS_ISDBT:
2043 case SYS_DTMB:
2044 fepriv->min_delay = HZ / 20;
2045 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2046 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2047 break;
2048 default:
2049 /*
2050 * FIXME: This sounds wrong! if freqency_stepsize is
2051 * defined by the frontend, why not use it???
2052 */
2053 fepriv->min_delay = HZ / 20;
2054 fepriv->step_size = 0; /* no zigzag */
2055 fepriv->max_drift = 0;
2056 break;
2057 }
2058 }
2059 if (dvb_override_tune_delay > 0)
2060 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2061
2062 fepriv->state = FESTATE_RETUNE;
2063
2064 /* Request the search algorithm to search */
2065 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2066
2067 dvb_frontend_clear_events(fe);
2068 dvb_frontend_add_event(fe, 0);
2069 dvb_frontend_wakeup(fe);
2070 fepriv->status = 0;
2071
2072 return 0;
2073 }
2074
2075
2076 static int dvb_frontend_handle_ioctl(struct file *file,
2077 unsigned int cmd, void *parg)
2078 {
2079 struct dvb_device *dvbdev = file->private_data;
2080 struct dvb_frontend *fe = dvbdev->priv;
2081 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2082 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2083 int i, err;
2084
2085 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2086
2087 switch(cmd) {
2088 case FE_SET_PROPERTY: {
2089 struct dtv_properties *tvps = parg;
2090 struct dtv_property *tvp = NULL;
2091
2092 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2093 __func__, tvps->num);
2094 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2095 __func__, tvps->props);
2096
2097 /*
2098 * Put an arbitrary limit on the number of messages that can
2099 * be sent at once
2100 */
2101 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2102 return -EINVAL;
2103
2104 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2105 if (IS_ERR(tvp))
2106 return PTR_ERR(tvp);
2107
2108 for (i = 0; i < tvps->num; i++) {
2109 err = dtv_property_process_set(fe, tvp + i, file);
2110 if (err < 0) {
2111 kfree(tvp);
2112 return err;
2113 }
2114 (tvp + i)->result = err;
2115 }
2116 kfree(tvp);
2117 break;
2118 }
2119 case FE_GET_PROPERTY: {
2120 struct dtv_properties *tvps = parg;
2121 struct dtv_property *tvp = NULL;
2122 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2123
2124 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2125 __func__, tvps->num);
2126 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2127 __func__, tvps->props);
2128
2129 /*
2130 * Put an arbitrary limit on the number of messages that can
2131 * be sent at once
2132 */
2133 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2134 return -EINVAL;
2135
2136 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2137 if (IS_ERR(tvp))
2138 return PTR_ERR(tvp);
2139
2140 /*
2141 * Let's use our own copy of property cache, in order to
2142 * avoid mangling with DTV zigzag logic, as drivers might
2143 * return crap, if they don't check if the data is available
2144 * before updating the properties cache.
2145 */
2146 if (fepriv->state != FESTATE_IDLE) {
2147 err = dtv_get_frontend(fe, &getp, NULL);
2148 if (err < 0) {
2149 kfree(tvp);
2150 return err;
2151 }
2152 }
2153 for (i = 0; i < tvps->num; i++) {
2154 err = dtv_property_process_get(fe, &getp, tvp + i, file);
2155 if (err < 0) {
2156 kfree(tvp);
2157 return err;
2158 }
2159 (tvp + i)->result = err;
2160 }
2161
2162 if (copy_to_user((void __user *)tvps->props, tvp,
2163 tvps->num * sizeof(struct dtv_property))) {
2164 kfree(tvp);
2165 return -EFAULT;
2166 }
2167 kfree(tvp);
2168 break;
2169 }
2170
2171 case FE_GET_INFO: {
2172 struct dvb_frontend_info* info = parg;
2173
2174 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2175 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2176
2177 /*
2178 * Associate the 4 delivery systems supported by DVBv3
2179 * API with their DVBv5 counterpart. For the other standards,
2180 * use the closest type, assuming that it would hopefully
2181 * work with a DVBv3 application.
2182 * It should be noticed that, on multi-frontend devices with
2183 * different types (terrestrial and cable, for example),
2184 * a pure DVBv3 application won't be able to use all delivery
2185 * systems. Yet, changing the DVBv5 cache to the other delivery
2186 * system should be enough for making it work.
2187 */
2188 switch (dvbv3_type(c->delivery_system)) {
2189 case DVBV3_QPSK:
2190 info->type = FE_QPSK;
2191 break;
2192 case DVBV3_ATSC:
2193 info->type = FE_ATSC;
2194 break;
2195 case DVBV3_QAM:
2196 info->type = FE_QAM;
2197 break;
2198 case DVBV3_OFDM:
2199 info->type = FE_OFDM;
2200 break;
2201 default:
2202 dev_err(fe->dvb->device,
2203 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2204 __func__, c->delivery_system);
2205 fe->ops.info.type = FE_OFDM;
2206 }
2207 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2208 __func__, c->delivery_system, fe->ops.info.type);
2209
2210 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2211 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2212 info->caps |= FE_CAN_INVERSION_AUTO;
2213 err = 0;
2214 break;
2215 }
2216
2217 case FE_READ_STATUS: {
2218 enum fe_status *status = parg;
2219
2220 /* if retune was requested but hasn't occurred yet, prevent
2221 * that user get signal state from previous tuning */
2222 if (fepriv->state == FESTATE_RETUNE ||
2223 fepriv->state == FESTATE_ERROR) {
2224 err=0;
2225 *status = 0;
2226 break;
2227 }
2228
2229 if (fe->ops.read_status)
2230 err = fe->ops.read_status(fe, status);
2231 break;
2232 }
2233
2234 case FE_DISEQC_RESET_OVERLOAD:
2235 if (fe->ops.diseqc_reset_overload) {
2236 err = fe->ops.diseqc_reset_overload(fe);
2237 fepriv->state = FESTATE_DISEQC;
2238 fepriv->status = 0;
2239 }
2240 break;
2241
2242 case FE_DISEQC_SEND_MASTER_CMD:
2243 if (fe->ops.diseqc_send_master_cmd) {
2244 struct dvb_diseqc_master_cmd *cmd = parg;
2245
2246 if (cmd->msg_len > sizeof(cmd->msg)) {
2247 err = -EINVAL;
2248 break;
2249 }
2250 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2251 fepriv->state = FESTATE_DISEQC;
2252 fepriv->status = 0;
2253 }
2254 break;
2255
2256 case FE_DISEQC_SEND_BURST:
2257 if (fe->ops.diseqc_send_burst) {
2258 err = fe->ops.diseqc_send_burst(fe,
2259 (enum fe_sec_mini_cmd)parg);
2260 fepriv->state = FESTATE_DISEQC;
2261 fepriv->status = 0;
2262 }
2263 break;
2264
2265 case FE_SET_TONE:
2266 if (fe->ops.set_tone) {
2267 err = fe->ops.set_tone(fe,
2268 (enum fe_sec_tone_mode)parg);
2269 fepriv->tone = (enum fe_sec_tone_mode)parg;
2270 fepriv->state = FESTATE_DISEQC;
2271 fepriv->status = 0;
2272 }
2273 break;
2274
2275 case FE_SET_VOLTAGE:
2276 if (fe->ops.set_voltage) {
2277 err = fe->ops.set_voltage(fe,
2278 (enum fe_sec_voltage)parg);
2279 fepriv->voltage = (enum fe_sec_voltage)parg;
2280 fepriv->state = FESTATE_DISEQC;
2281 fepriv->status = 0;
2282 }
2283 break;
2284
2285 case FE_DISEQC_RECV_SLAVE_REPLY:
2286 if (fe->ops.diseqc_recv_slave_reply)
2287 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2288 break;
2289
2290 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2291 if (fe->ops.enable_high_lnb_voltage)
2292 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2293 break;
2294
2295 case FE_SET_FRONTEND_TUNE_MODE:
2296 fepriv->tune_mode_flags = (unsigned long) parg;
2297 err = 0;
2298 break;
2299
2300 /* DEPRECATED dish control ioctls */
2301
2302 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2303 if (fe->ops.dishnetwork_send_legacy_command) {
2304 err = fe->ops.dishnetwork_send_legacy_command(fe,
2305 (unsigned long)parg);
2306 fepriv->state = FESTATE_DISEQC;
2307 fepriv->status = 0;
2308 } else if (fe->ops.set_voltage) {
2309 /*
2310 * NOTE: This is a fallback condition. Some frontends
2311 * (stv0299 for instance) take longer than 8msec to
2312 * respond to a set_voltage command. Those switches
2313 * need custom routines to switch properly. For all
2314 * other frontends, the following should work ok.
2315 * Dish network legacy switches (as used by Dish500)
2316 * are controlled by sending 9-bit command words
2317 * spaced 8msec apart.
2318 * the actual command word is switch/port dependent
2319 * so it is up to the userspace application to send
2320 * the right command.
2321 * The command must always start with a '0' after
2322 * initialization, so parg is 8 bits and does not
2323 * include the initialization or start bit
2324 */
2325 unsigned long swcmd = ((unsigned long) parg) << 1;
2326 ktime_t nexttime;
2327 ktime_t tv[10];
2328 int i;
2329 u8 last = 1;
2330 if (dvb_frontend_debug)
2331 dprintk("%s switch command: 0x%04lx\n",
2332 __func__, swcmd);
2333 nexttime = ktime_get_boottime();
2334 if (dvb_frontend_debug)
2335 tv[0] = nexttime;
2336 /* before sending a command, initialize by sending
2337 * a 32ms 18V to the switch
2338 */
2339 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2340 dvb_frontend_sleep_until(&nexttime, 32000);
2341
2342 for (i = 0; i < 9; i++) {
2343 if (dvb_frontend_debug)
2344 tv[i+1] = ktime_get_boottime();
2345 if ((swcmd & 0x01) != last) {
2346 /* set voltage to (last ? 13V : 18V) */
2347 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2348 last = (last) ? 0 : 1;
2349 }
2350 swcmd = swcmd >> 1;
2351 if (i != 8)
2352 dvb_frontend_sleep_until(&nexttime, 8000);
2353 }
2354 if (dvb_frontend_debug) {
2355 dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n",
2356 __func__, fe->dvb->num);
2357 for (i = 1; i < 10; i++)
2358 pr_info("%d: %d\n", i,
2359 (int) ktime_us_delta(tv[i], tv[i-1]));
2360 }
2361 err = 0;
2362 fepriv->state = FESTATE_DISEQC;
2363 fepriv->status = 0;
2364 }
2365 break;
2366
2367 /* DEPRECATED statistics ioctls */
2368
2369 case FE_READ_BER:
2370 if (fe->ops.read_ber) {
2371 if (fepriv->thread)
2372 err = fe->ops.read_ber(fe, (__u32 *) parg);
2373 else
2374 err = -EAGAIN;
2375 }
2376 break;
2377
2378 case FE_READ_SIGNAL_STRENGTH:
2379 if (fe->ops.read_signal_strength) {
2380 if (fepriv->thread)
2381 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2382 else
2383 err = -EAGAIN;
2384 }
2385 break;
2386
2387 case FE_READ_SNR:
2388 if (fe->ops.read_snr) {
2389 if (fepriv->thread)
2390 err = fe->ops.read_snr(fe, (__u16 *) parg);
2391 else
2392 err = -EAGAIN;
2393 }
2394 break;
2395
2396 case FE_READ_UNCORRECTED_BLOCKS:
2397 if (fe->ops.read_ucblocks) {
2398 if (fepriv->thread)
2399 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2400 else
2401 err = -EAGAIN;
2402 }
2403 break;
2404
2405 /* DEPRECATED DVBv3 ioctls */
2406
2407 case FE_SET_FRONTEND:
2408 err = dvbv3_set_delivery_system(fe);
2409 if (err)
2410 break;
2411
2412 err = dtv_property_cache_sync(fe, c, parg);
2413 if (err)
2414 break;
2415 err = dtv_set_frontend(fe);
2416 break;
2417 case FE_GET_EVENT:
2418 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2419 break;
2420
2421 case FE_GET_FRONTEND: {
2422 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2423
2424 /*
2425 * Let's use our own copy of property cache, in order to
2426 * avoid mangling with DTV zigzag logic, as drivers might
2427 * return crap, if they don't check if the data is available
2428 * before updating the properties cache.
2429 */
2430 err = dtv_get_frontend(fe, &getp, parg);
2431 break;
2432 }
2433
2434 default:
2435 return -ENOTSUPP;
2436 } /* switch */
2437
2438 return err;
2439 }
2440
2441
2442 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2443 {
2444 struct dvb_device *dvbdev = file->private_data;
2445 struct dvb_frontend *fe = dvbdev->priv;
2446 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2447
2448 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2449
2450 poll_wait (file, &fepriv->events.wait_queue, wait);
2451
2452 if (fepriv->events.eventw != fepriv->events.eventr)
2453 return (POLLIN | POLLRDNORM | POLLPRI);
2454
2455 return 0;
2456 }
2457
2458 static int dvb_frontend_open(struct inode *inode, struct file *file)
2459 {
2460 struct dvb_device *dvbdev = file->private_data;
2461 struct dvb_frontend *fe = dvbdev->priv;
2462 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2463 struct dvb_adapter *adapter = fe->dvb;
2464 int ret;
2465
2466 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2467 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2468 return -ENODEV;
2469
2470 if (adapter->mfe_shared) {
2471 mutex_lock (&adapter->mfe_lock);
2472
2473 if (adapter->mfe_dvbdev == NULL)
2474 adapter->mfe_dvbdev = dvbdev;
2475
2476 else if (adapter->mfe_dvbdev != dvbdev) {
2477 struct dvb_device
2478 *mfedev = adapter->mfe_dvbdev;
2479 struct dvb_frontend
2480 *mfe = mfedev->priv;
2481 struct dvb_frontend_private
2482 *mfepriv = mfe->frontend_priv;
2483 int mferetry = (dvb_mfe_wait_time << 1);
2484
2485 mutex_unlock (&adapter->mfe_lock);
2486 while (mferetry-- && (mfedev->users != -1 ||
2487 mfepriv->thread != NULL)) {
2488 if(msleep_interruptible(500)) {
2489 if(signal_pending(current))
2490 return -EINTR;
2491 }
2492 }
2493
2494 mutex_lock (&adapter->mfe_lock);
2495 if(adapter->mfe_dvbdev != dvbdev) {
2496 mfedev = adapter->mfe_dvbdev;
2497 mfe = mfedev->priv;
2498 mfepriv = mfe->frontend_priv;
2499 if (mfedev->users != -1 ||
2500 mfepriv->thread != NULL) {
2501 mutex_unlock (&adapter->mfe_lock);
2502 return -EBUSY;
2503 }
2504 adapter->mfe_dvbdev = dvbdev;
2505 }
2506 }
2507 }
2508
2509 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2510 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2511 goto err0;
2512
2513 /* If we took control of the bus, we need to force
2514 reinitialization. This is because many ts_bus_ctrl()
2515 functions strobe the RESET pin on the demod, and if the
2516 frontend thread already exists then the dvb_init() routine
2517 won't get called (which is what usually does initial
2518 register configuration). */
2519 fepriv->reinitialise = 1;
2520 }
2521
2522 if ((ret = dvb_generic_open (inode, file)) < 0)
2523 goto err1;
2524
2525 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2526 /* normal tune mode when opened R/W */
2527 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2528 fepriv->tone = -1;
2529 fepriv->voltage = -1;
2530
2531 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2532 if (fe->dvb->mdev) {
2533 mutex_lock(&fe->dvb->mdev->graph_mutex);
2534 if (fe->dvb->mdev->enable_source)
2535 ret = fe->dvb->mdev->enable_source(
2536 dvbdev->entity,
2537 &fepriv->pipe);
2538 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2539 if (ret) {
2540 dev_err(fe->dvb->device,
2541 "Tuner is busy. Error %d\n", ret);
2542 goto err2;
2543 }
2544 }
2545 #endif
2546 ret = dvb_frontend_start (fe);
2547 if (ret)
2548 goto err3;
2549
2550 /* empty event queue */
2551 fepriv->events.eventr = fepriv->events.eventw = 0;
2552 }
2553
2554 dvb_frontend_get(fe);
2555
2556 if (adapter->mfe_shared)
2557 mutex_unlock (&adapter->mfe_lock);
2558 return ret;
2559
2560 err3:
2561 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2562 if (fe->dvb->mdev) {
2563 mutex_lock(&fe->dvb->mdev->graph_mutex);
2564 if (fe->dvb->mdev->disable_source)
2565 fe->dvb->mdev->disable_source(dvbdev->entity);
2566 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2567 }
2568 err2:
2569 #endif
2570 dvb_generic_release(inode, file);
2571 err1:
2572 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2573 fe->ops.ts_bus_ctrl(fe, 0);
2574 err0:
2575 if (adapter->mfe_shared)
2576 mutex_unlock (&adapter->mfe_lock);
2577 return ret;
2578 }
2579
2580 static int dvb_frontend_release(struct inode *inode, struct file *file)
2581 {
2582 struct dvb_device *dvbdev = file->private_data;
2583 struct dvb_frontend *fe = dvbdev->priv;
2584 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2585 int ret;
2586
2587 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2588
2589 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2590 fepriv->release_jiffies = jiffies;
2591 mb();
2592 }
2593
2594 ret = dvb_generic_release (inode, file);
2595
2596 if (dvbdev->users == -1) {
2597 wake_up(&fepriv->wait_queue);
2598 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2599 if (fe->dvb->mdev) {
2600 mutex_lock(&fe->dvb->mdev->graph_mutex);
2601 if (fe->dvb->mdev->disable_source)
2602 fe->dvb->mdev->disable_source(dvbdev->entity);
2603 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2604 }
2605 #endif
2606 if (fe->exit != DVB_FE_NO_EXIT)
2607 wake_up(&dvbdev->wait_queue);
2608 if (fe->ops.ts_bus_ctrl)
2609 fe->ops.ts_bus_ctrl(fe, 0);
2610 }
2611
2612 dvb_frontend_put(fe);
2613
2614 return ret;
2615 }
2616
2617 static const struct file_operations dvb_frontend_fops = {
2618 .owner = THIS_MODULE,
2619 .unlocked_ioctl = dvb_generic_ioctl,
2620 .poll = dvb_frontend_poll,
2621 .open = dvb_frontend_open,
2622 .release = dvb_frontend_release,
2623 .llseek = noop_llseek,
2624 };
2625
2626 int dvb_frontend_suspend(struct dvb_frontend *fe)
2627 {
2628 int ret = 0;
2629
2630 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2631 fe->id);
2632
2633 if (fe->ops.tuner_ops.suspend)
2634 ret = fe->ops.tuner_ops.suspend(fe);
2635 else if (fe->ops.tuner_ops.sleep)
2636 ret = fe->ops.tuner_ops.sleep(fe);
2637
2638 if (fe->ops.sleep)
2639 ret = fe->ops.sleep(fe);
2640
2641 return ret;
2642 }
2643 EXPORT_SYMBOL(dvb_frontend_suspend);
2644
2645 int dvb_frontend_resume(struct dvb_frontend *fe)
2646 {
2647 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2648 int ret = 0;
2649
2650 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2651 fe->id);
2652
2653 fe->exit = DVB_FE_DEVICE_RESUME;
2654 if (fe->ops.init)
2655 ret = fe->ops.init(fe);
2656
2657 if (fe->ops.tuner_ops.resume)
2658 ret = fe->ops.tuner_ops.resume(fe);
2659 else if (fe->ops.tuner_ops.init)
2660 ret = fe->ops.tuner_ops.init(fe);
2661
2662 if (fe->ops.set_tone && fepriv->tone != -1)
2663 fe->ops.set_tone(fe, fepriv->tone);
2664 if (fe->ops.set_voltage && fepriv->voltage != -1)
2665 fe->ops.set_voltage(fe, fepriv->voltage);
2666
2667 fe->exit = DVB_FE_NO_EXIT;
2668 fepriv->state = FESTATE_RETUNE;
2669 dvb_frontend_wakeup(fe);
2670
2671 return ret;
2672 }
2673 EXPORT_SYMBOL(dvb_frontend_resume);
2674
2675 int dvb_register_frontend(struct dvb_adapter* dvb,
2676 struct dvb_frontend* fe)
2677 {
2678 struct dvb_frontend_private *fepriv;
2679 const struct dvb_device dvbdev_template = {
2680 .users = ~0,
2681 .writers = 1,
2682 .readers = (~0)-1,
2683 .fops = &dvb_frontend_fops,
2684 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2685 .name = fe->ops.info.name,
2686 #endif
2687 .kernel_ioctl = dvb_frontend_ioctl
2688 };
2689
2690 dev_dbg(dvb->device, "%s:\n", __func__);
2691
2692 if (mutex_lock_interruptible(&frontend_mutex))
2693 return -ERESTARTSYS;
2694
2695 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2696 if (fe->frontend_priv == NULL) {
2697 mutex_unlock(&frontend_mutex);
2698 return -ENOMEM;
2699 }
2700 fepriv = fe->frontend_priv;
2701
2702 kref_init(&fe->refcount);
2703
2704 /*
2705 * After initialization, there need to be two references: one
2706 * for dvb_unregister_frontend(), and another one for
2707 * dvb_frontend_detach().
2708 */
2709 dvb_frontend_get(fe);
2710
2711 sema_init(&fepriv->sem, 1);
2712 init_waitqueue_head (&fepriv->wait_queue);
2713 init_waitqueue_head (&fepriv->events.wait_queue);
2714 mutex_init(&fepriv->events.mtx);
2715 fe->dvb = dvb;
2716 fepriv->inversion = INVERSION_OFF;
2717
2718 dev_info(fe->dvb->device,
2719 "DVB: registering adapter %i frontend %i (%s)...\n",
2720 fe->dvb->num, fe->id, fe->ops.info.name);
2721
2722 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2723 fe, DVB_DEVICE_FRONTEND, 0);
2724
2725 /*
2726 * Initialize the cache to the proper values according with the
2727 * first supported delivery system (ops->delsys[0])
2728 */
2729
2730 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2731 dvb_frontend_clear_cache(fe);
2732
2733 mutex_unlock(&frontend_mutex);
2734 return 0;
2735 }
2736 EXPORT_SYMBOL(dvb_register_frontend);
2737
2738 int dvb_unregister_frontend(struct dvb_frontend* fe)
2739 {
2740 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2741 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2742
2743 mutex_lock(&frontend_mutex);
2744 dvb_frontend_stop(fe);
2745 dvb_remove_device(fepriv->dvbdev);
2746
2747 /* fe is invalid now */
2748 mutex_unlock(&frontend_mutex);
2749 dvb_frontend_put(fe);
2750 return 0;
2751 }
2752 EXPORT_SYMBOL(dvb_unregister_frontend);
2753
2754 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
2755 void (*release)(struct dvb_frontend *fe))
2756 {
2757 if (release) {
2758 release(fe);
2759 #ifdef CONFIG_MEDIA_ATTACH
2760 dvb_detach(release);
2761 #endif
2762 }
2763 }
2764
2765 void dvb_frontend_detach(struct dvb_frontend* fe)
2766 {
2767 dvb_frontend_invoke_release(fe, fe->ops.release_sec);
2768 dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
2769 dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
2770 dvb_frontend_invoke_release(fe, fe->ops.detach);
2771 dvb_frontend_put(fe);
2772 }
2773 EXPORT_SYMBOL(dvb_frontend_detach);
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