?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 4.16.11
[linux/fpc-iii.git] / drivers / media / dvb-core / dvb_frontend.c
bloba7ed16e0841d5001174cc19c78a98b510290fac5
1 /*
2 * dvb_frontend.c: DVB frontend tuning interface/thread
3 *
4 *
5 * Copyright (C) 1999-2001 Ralph Metzler
6 * Marcus Metzler
7 * Holger Waechtler
8 * for convergence integrated media GmbH
9 *
10 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 * To obtain the license, point your browser to
22 * http://www.gnu.org/copyleft/gpl.html
23 */
24
25 /* Enables DVBv3 compatibility bits at the headers */
26 #define __DVB_CORE__
27
28 #define pr_fmt(fmt) "dvb_frontend: " fmt
29
30 #include <linux/string.h>
31 #include <linux/kernel.h>
32 #include <linux/sched/signal.h>
33 #include <linux/wait.h>
34 #include <linux/slab.h>
35 #include <linux/poll.h>
36 #include <linux/semaphore.h>
37 #include <linux/module.h>
38 #include <linux/list.h>
39 #include <linux/freezer.h>
40 #include <linux/jiffies.h>
41 #include <linux/kthread.h>
42 #include <linux/ktime.h>
43 #include <linux/compat.h>
44 #include <asm/processor.h>
45
46 #include <media/dvb_frontend.h>
47 #include <media/dvbdev.h>
48 #include <linux/dvb/version.h>
49
50 static int dvb_frontend_debug;
51 static int dvb_shutdown_timeout;
52 static int dvb_force_auto_inversion;
53 static int dvb_override_tune_delay;
54 static int dvb_powerdown_on_sleep = 1;
55 static int dvb_mfe_wait_time = 5;
56
57 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
58 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
59 module_param(dvb_shutdown_timeout, int, 0644);
60 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
61 module_param(dvb_force_auto_inversion, int, 0644);
62 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
63 module_param(dvb_override_tune_delay, int, 0644);
64 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
65 module_param(dvb_powerdown_on_sleep, int, 0644);
66 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
67 module_param(dvb_mfe_wait_time, int, 0644);
68 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
69
70 #define dprintk(fmt, arg...) \
71 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
72
73 #define FESTATE_IDLE 1
74 #define FESTATE_RETUNE 2
75 #define FESTATE_TUNING_FAST 4
76 #define FESTATE_TUNING_SLOW 8
77 #define FESTATE_TUNED 16
78 #define FESTATE_ZIGZAG_FAST 32
79 #define FESTATE_ZIGZAG_SLOW 64
80 #define FESTATE_DISEQC 128
81 #define FESTATE_ERROR 256
82 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
83 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
84 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
85 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
86
87 /*
88 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
89 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
90 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
91 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
92 * FESTATE_TUNED. The frontend has successfully locked on.
93 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
94 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
95 * FESTATE_DISEQC. A DISEQC command has just been issued.
96 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
97 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
98 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
99 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
100 */
101
102 static DEFINE_MUTEX(frontend_mutex);
103
104 struct dvb_frontend_private {
105 /* thread/frontend values */
106 struct dvb_device *dvbdev;
107 struct dvb_frontend_parameters parameters_out;
108 struct dvb_fe_events events;
109 struct semaphore sem;
110 struct list_head list_head;
111 wait_queue_head_t wait_queue;
112 struct task_struct *thread;
113 unsigned long release_jiffies;
114 unsigned int wakeup;
115 enum fe_status status;
116 unsigned long tune_mode_flags;
117 unsigned int delay;
118 unsigned int reinitialise;
119 int tone;
120 int voltage;
121
122 /* swzigzag values */
123 unsigned int state;
124 unsigned int bending;
125 int lnb_drift;
126 unsigned int inversion;
127 unsigned int auto_step;
128 unsigned int auto_sub_step;
129 unsigned int started_auto_step;
130 unsigned int min_delay;
131 unsigned int max_drift;
132 unsigned int step_size;
133 int quality;
134 unsigned int check_wrapped;
135 enum dvbfe_search algo_status;
136
137 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
138 struct media_pipeline pipe;
139 #endif
140 };
141
142 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
143 void (*release)(struct dvb_frontend *fe));
144
145 static void __dvb_frontend_free(struct dvb_frontend *fe)
146 {
147 struct dvb_frontend_private *fepriv = fe->frontend_priv;
148
149 if (fepriv)
150 dvb_free_device(fepriv->dvbdev);
151
152 dvb_frontend_invoke_release(fe, fe->ops.release);
153
154 kfree(fepriv);
155 }
156
157 static void dvb_frontend_free(struct kref *ref)
158 {
159 struct dvb_frontend *fe =
160 container_of(ref, struct dvb_frontend, refcount);
161
162 __dvb_frontend_free(fe);
163 }
164
165 static void dvb_frontend_put(struct dvb_frontend *fe)
166 {
167 /*
168 * Check if the frontend was registered, as otherwise
169 * kref was not initialized yet.
170 */
171 if (fe->frontend_priv)
172 kref_put(&fe->refcount, dvb_frontend_free);
173 else
174 __dvb_frontend_free(fe);
175 }
176
177 static void dvb_frontend_get(struct dvb_frontend *fe)
178 {
179 kref_get(&fe->refcount);
180 }
181
182 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
183 static int dtv_get_frontend(struct dvb_frontend *fe,
184 struct dtv_frontend_properties *c,
185 struct dvb_frontend_parameters *p_out);
186 static int
187 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
188 const struct dtv_frontend_properties *c,
189 struct dvb_frontend_parameters *p);
190
191 static bool has_get_frontend(struct dvb_frontend *fe)
192 {
193 return fe->ops.get_frontend != NULL;
194 }
195
196 /*
197 * Due to DVBv3 API calls, a delivery system should be mapped into one of
198 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
199 * otherwise, a DVBv3 call will fail.
200 */
201 enum dvbv3_emulation_type {
202 DVBV3_UNKNOWN,
203 DVBV3_QPSK,
204 DVBV3_QAM,
205 DVBV3_OFDM,
206 DVBV3_ATSC,
207 };
208
209 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
210 {
211 switch (delivery_system) {
212 case SYS_DVBC_ANNEX_A:
213 case SYS_DVBC_ANNEX_C:
214 return DVBV3_QAM;
215 case SYS_DVBS:
216 case SYS_DVBS2:
217 case SYS_TURBO:
218 case SYS_ISDBS:
219 case SYS_DSS:
220 return DVBV3_QPSK;
221 case SYS_DVBT:
222 case SYS_DVBT2:
223 case SYS_ISDBT:
224 case SYS_DTMB:
225 return DVBV3_OFDM;
226 case SYS_ATSC:
227 case SYS_ATSCMH:
228 case SYS_DVBC_ANNEX_B:
229 return DVBV3_ATSC;
230 case SYS_UNDEFINED:
231 case SYS_ISDBC:
232 case SYS_DVBH:
233 case SYS_DAB:
234 default:
235 /*
236 * Doesn't know how to emulate those types and/or
237 * there's no frontend driver from this type yet
238 * with some emulation code, so, we're not sure yet how
239 * to handle them, or they're not compatible with a DVBv3 call.
240 */
241 return DVBV3_UNKNOWN;
242 }
243 }
244
245 static void dvb_frontend_add_event(struct dvb_frontend *fe,
246 enum fe_status status)
247 {
248 struct dvb_frontend_private *fepriv = fe->frontend_priv;
249 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
250 struct dvb_fe_events *events = &fepriv->events;
251 struct dvb_frontend_event *e;
252 int wp;
253
254 dev_dbg(fe->dvb->device, "%s:\n", __func__);
255
256 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
257 dtv_get_frontend(fe, c, &fepriv->parameters_out);
258
259 mutex_lock(&events->mtx);
260
261 wp = (events->eventw + 1) % MAX_EVENT;
262 if (wp == events->eventr) {
263 events->overflow = 1;
264 events->eventr = (events->eventr + 1) % MAX_EVENT;
265 }
266
267 e = &events->events[events->eventw];
268 e->status = status;
269 e->parameters = fepriv->parameters_out;
270
271 events->eventw = wp;
272
273 mutex_unlock(&events->mtx);
274
275 wake_up_interruptible (&events->wait_queue);
276 }
277
278 static int dvb_frontend_get_event(struct dvb_frontend *fe,
279 struct dvb_frontend_event *event, int flags)
280 {
281 struct dvb_frontend_private *fepriv = fe->frontend_priv;
282 struct dvb_fe_events *events = &fepriv->events;
283
284 dev_dbg(fe->dvb->device, "%s:\n", __func__);
285
286 if (events->overflow) {
287 events->overflow = 0;
288 return -EOVERFLOW;
289 }
290
291 if (events->eventw == events->eventr) {
292 int ret;
293
294 if (flags & O_NONBLOCK)
295 return -EWOULDBLOCK;
296
297 up(&fepriv->sem);
298
299 ret = wait_event_interruptible (events->wait_queue,
300 events->eventw != events->eventr);
301
302 if (down_interruptible (&fepriv->sem))
303 return -ERESTARTSYS;
304
305 if (ret < 0)
306 return ret;
307 }
308
309 mutex_lock(&events->mtx);
310 *event = events->events[events->eventr];
311 events->eventr = (events->eventr + 1) % MAX_EVENT;
312 mutex_unlock(&events->mtx);
313
314 return 0;
315 }
316
317 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
318 {
319 struct dvb_frontend_private *fepriv = fe->frontend_priv;
320 struct dvb_fe_events *events = &fepriv->events;
321
322 mutex_lock(&events->mtx);
323 events->eventr = events->eventw;
324 mutex_unlock(&events->mtx);
325 }
326
327 static void dvb_frontend_init(struct dvb_frontend *fe)
328 {
329 dev_dbg(fe->dvb->device,
330 "%s: initialising adapter %i frontend %i (%s)...\n",
331 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
332
333 if (fe->ops.init)
334 fe->ops.init(fe);
335 if (fe->ops.tuner_ops.init) {
336 if (fe->ops.i2c_gate_ctrl)
337 fe->ops.i2c_gate_ctrl(fe, 1);
338 fe->ops.tuner_ops.init(fe);
339 if (fe->ops.i2c_gate_ctrl)
340 fe->ops.i2c_gate_ctrl(fe, 0);
341 }
342 }
343
344 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
345 {
346 struct dvb_frontend_private *fepriv = fe->frontend_priv;
347
348 fepriv->reinitialise = 1;
349 dvb_frontend_wakeup(fe);
350 }
351 EXPORT_SYMBOL(dvb_frontend_reinitialise);
352
353 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
354 {
355 int q2;
356 struct dvb_frontend *fe = fepriv->dvbdev->priv;
357
358 dev_dbg(fe->dvb->device, "%s:\n", __func__);
359
360 if (locked)
361 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
362 else
363 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
364
365 q2 = fepriv->quality - 128;
366 q2 *= q2;
367
368 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
369 }
370
371 /**
372 * dvb_frontend_swzigzag_autotune - Performs automatic twiddling of frontend
373 * parameters.
374 *
375 * @fe: The frontend concerned.
376 * @check_wrapped: Checks if an iteration has completed.
377 * DO NOT SET ON THE FIRST ATTEMPT.
378 *
379 * return: Number of complete iterations that have been performed.
380 */
381 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
382 {
383 int autoinversion;
384 int ready = 0;
385 int fe_set_err = 0;
386 struct dvb_frontend_private *fepriv = fe->frontend_priv;
387 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
388 int original_inversion = c->inversion;
389 u32 original_frequency = c->frequency;
390
391 /* are we using autoinversion? */
392 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
393 (c->inversion == INVERSION_AUTO));
394
395 /* setup parameters correctly */
396 while(!ready) {
397 /* calculate the lnb_drift */
398 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
399
400 /* wrap the auto_step if we've exceeded the maximum drift */
401 if (fepriv->lnb_drift > fepriv->max_drift) {
402 fepriv->auto_step = 0;
403 fepriv->auto_sub_step = 0;
404 fepriv->lnb_drift = 0;
405 }
406
407 /* perform inversion and +/- zigzag */
408 switch(fepriv->auto_sub_step) {
409 case 0:
410 /* try with the current inversion and current drift setting */
411 ready = 1;
412 break;
413
414 case 1:
415 if (!autoinversion) break;
416
417 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
418 ready = 1;
419 break;
420
421 case 2:
422 if (fepriv->lnb_drift == 0) break;
423
424 fepriv->lnb_drift = -fepriv->lnb_drift;
425 ready = 1;
426 break;
427
428 case 3:
429 if (fepriv->lnb_drift == 0) break;
430 if (!autoinversion) break;
431
432 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
433 fepriv->lnb_drift = -fepriv->lnb_drift;
434 ready = 1;
435 break;
436
437 default:
438 fepriv->auto_step++;
439 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
440 break;
441 }
442
443 if (!ready) fepriv->auto_sub_step++;
444 }
445
446 /* if this attempt would hit where we started, indicate a complete
447 * iteration has occurred */
448 if ((fepriv->auto_step == fepriv->started_auto_step) &&
449 (fepriv->auto_sub_step == 0) && check_wrapped) {
450 return 1;
451 }
452
453 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
454 "auto_sub_step:%i started_auto_step:%i\n",
455 __func__, fepriv->lnb_drift, fepriv->inversion,
456 fepriv->auto_step, fepriv->auto_sub_step,
457 fepriv->started_auto_step);
458
459 /* set the frontend itself */
460 c->frequency += fepriv->lnb_drift;
461 if (autoinversion)
462 c->inversion = fepriv->inversion;
463 tmp = *c;
464 if (fe->ops.set_frontend)
465 fe_set_err = fe->ops.set_frontend(fe);
466 *c = tmp;
467 if (fe_set_err < 0) {
468 fepriv->state = FESTATE_ERROR;
469 return fe_set_err;
470 }
471
472 c->frequency = original_frequency;
473 c->inversion = original_inversion;
474
475 fepriv->auto_sub_step++;
476 return 0;
477 }
478
479 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
480 {
481 enum fe_status s = FE_NONE;
482 int retval = 0;
483 struct dvb_frontend_private *fepriv = fe->frontend_priv;
484 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
485
486 /* if we've got no parameters, just keep idling */
487 if (fepriv->state & FESTATE_IDLE) {
488 fepriv->delay = 3*HZ;
489 fepriv->quality = 0;
490 return;
491 }
492
493 /* in SCAN mode, we just set the frontend when asked and leave it alone */
494 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
495 if (fepriv->state & FESTATE_RETUNE) {
496 tmp = *c;
497 if (fe->ops.set_frontend)
498 retval = fe->ops.set_frontend(fe);
499 *c = tmp;
500 if (retval < 0)
501 fepriv->state = FESTATE_ERROR;
502 else
503 fepriv->state = FESTATE_TUNED;
504 }
505 fepriv->delay = 3*HZ;
506 fepriv->quality = 0;
507 return;
508 }
509
510 /* get the frontend status */
511 if (fepriv->state & FESTATE_RETUNE) {
512 s = 0;
513 } else {
514 if (fe->ops.read_status)
515 fe->ops.read_status(fe, &s);
516 if (s != fepriv->status) {
517 dvb_frontend_add_event(fe, s);
518 fepriv->status = s;
519 }
520 }
521
522 /* if we're not tuned, and we have a lock, move to the TUNED state */
523 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
524 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
525 fepriv->state = FESTATE_TUNED;
526
527 /* if we're tuned, then we have determined the correct inversion */
528 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
529 (c->inversion == INVERSION_AUTO)) {
530 c->inversion = fepriv->inversion;
531 }
532 return;
533 }
534
535 /* if we are tuned already, check we're still locked */
536 if (fepriv->state & FESTATE_TUNED) {
537 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
538
539 /* we're tuned, and the lock is still good... */
540 if (s & FE_HAS_LOCK) {
541 return;
542 } else { /* if we _WERE_ tuned, but now don't have a lock */
543 fepriv->state = FESTATE_ZIGZAG_FAST;
544 fepriv->started_auto_step = fepriv->auto_step;
545 fepriv->check_wrapped = 0;
546 }
547 }
548
549 /* don't actually do anything if we're in the LOSTLOCK state,
550 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
551 if ((fepriv->state & FESTATE_LOSTLOCK) &&
552 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
553 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
554 return;
555 }
556
557 /* don't do anything if we're in the DISEQC state, since this
558 * might be someone with a motorized dish controlled by DISEQC.
559 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
560 if (fepriv->state & FESTATE_DISEQC) {
561 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
562 return;
563 }
564
565 /* if we're in the RETUNE state, set everything up for a brand
566 * new scan, keeping the current inversion setting, as the next
567 * tune is _very_ likely to require the same */
568 if (fepriv->state & FESTATE_RETUNE) {
569 fepriv->lnb_drift = 0;
570 fepriv->auto_step = 0;
571 fepriv->auto_sub_step = 0;
572 fepriv->started_auto_step = 0;
573 fepriv->check_wrapped = 0;
574 }
575
576 /* fast zigzag. */
577 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
578 fepriv->delay = fepriv->min_delay;
579
580 /* perform a tune */
581 retval = dvb_frontend_swzigzag_autotune(fe,
582 fepriv->check_wrapped);
583 if (retval < 0) {
584 return;
585 } else if (retval) {
586 /* OK, if we've run out of trials at the fast speed.
587 * Drop back to slow for the _next_ attempt */
588 fepriv->state = FESTATE_SEARCHING_SLOW;
589 fepriv->started_auto_step = fepriv->auto_step;
590 return;
591 }
592 fepriv->check_wrapped = 1;
593
594 /* if we've just retuned, enter the ZIGZAG_FAST state.
595 * This ensures we cannot return from an
596 * FE_SET_FRONTEND ioctl before the first frontend tune
597 * occurs */
598 if (fepriv->state & FESTATE_RETUNE) {
599 fepriv->state = FESTATE_TUNING_FAST;
600 }
601 }
602
603 /* slow zigzag */
604 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
605 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
606
607 /* Note: don't bother checking for wrapping; we stay in this
608 * state until we get a lock */
609 dvb_frontend_swzigzag_autotune(fe, 0);
610 }
611 }
612
613 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
614 {
615 struct dvb_frontend_private *fepriv = fe->frontend_priv;
616
617 if (fe->exit != DVB_FE_NO_EXIT)
618 return 1;
619
620 if (fepriv->dvbdev->writers == 1)
621 if (time_after_eq(jiffies, fepriv->release_jiffies +
622 dvb_shutdown_timeout * HZ))
623 return 1;
624
625 return 0;
626 }
627
628 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
629 {
630 struct dvb_frontend_private *fepriv = fe->frontend_priv;
631
632 if (fepriv->wakeup) {
633 fepriv->wakeup = 0;
634 return 1;
635 }
636 return dvb_frontend_is_exiting(fe);
637 }
638
639 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
640 {
641 struct dvb_frontend_private *fepriv = fe->frontend_priv;
642
643 fepriv->wakeup = 1;
644 wake_up_interruptible(&fepriv->wait_queue);
645 }
646
647 static int dvb_frontend_thread(void *data)
648 {
649 struct dvb_frontend *fe = data;
650 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
651 struct dvb_frontend_private *fepriv = fe->frontend_priv;
652 enum fe_status s = FE_NONE;
653 enum dvbfe_algo algo;
654 bool re_tune = false;
655 bool semheld = false;
656
657 dev_dbg(fe->dvb->device, "%s:\n", __func__);
658
659 fepriv->check_wrapped = 0;
660 fepriv->quality = 0;
661 fepriv->delay = 3*HZ;
662 fepriv->status = 0;
663 fepriv->wakeup = 0;
664 fepriv->reinitialise = 0;
665
666 dvb_frontend_init(fe);
667
668 set_freezable();
669 while (1) {
670 up(&fepriv->sem); /* is locked when we enter the thread... */
671 restart:
672 wait_event_interruptible_timeout(fepriv->wait_queue,
673 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
674 || freezing(current),
675 fepriv->delay);
676
677 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
678 /* got signal or quitting */
679 if (!down_interruptible(&fepriv->sem))
680 semheld = true;
681 fe->exit = DVB_FE_NORMAL_EXIT;
682 break;
683 }
684
685 if (try_to_freeze())
686 goto restart;
687
688 if (down_interruptible(&fepriv->sem))
689 break;
690
691 if (fepriv->reinitialise) {
692 dvb_frontend_init(fe);
693 if (fe->ops.set_tone && fepriv->tone != -1)
694 fe->ops.set_tone(fe, fepriv->tone);
695 if (fe->ops.set_voltage && fepriv->voltage != -1)
696 fe->ops.set_voltage(fe, fepriv->voltage);
697 fepriv->reinitialise = 0;
698 }
699
700 /* do an iteration of the tuning loop */
701 if (fe->ops.get_frontend_algo) {
702 algo = fe->ops.get_frontend_algo(fe);
703 switch (algo) {
704 case DVBFE_ALGO_HW:
705 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
706
707 if (fepriv->state & FESTATE_RETUNE) {
708 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
709 re_tune = true;
710 fepriv->state = FESTATE_TUNED;
711 } else {
712 re_tune = false;
713 }
714
715 if (fe->ops.tune)
716 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
717
718 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
719 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
720 dvb_frontend_add_event(fe, s);
721 fepriv->status = s;
722 }
723 break;
724 case DVBFE_ALGO_SW:
725 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
726 dvb_frontend_swzigzag(fe);
727 break;
728 case DVBFE_ALGO_CUSTOM:
729 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
730 if (fepriv->state & FESTATE_RETUNE) {
731 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
732 fepriv->state = FESTATE_TUNED;
733 }
734 /* Case where we are going to search for a carrier
735 * User asked us to retune again for some reason, possibly
736 * requesting a search with a new set of parameters
737 */
738 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
739 if (fe->ops.search) {
740 fepriv->algo_status = fe->ops.search(fe);
741 /* We did do a search as was requested, the flags are
742 * now unset as well and has the flags wrt to search.
743 */
744 } else {
745 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
746 }
747 }
748 /* Track the carrier if the search was successful */
749 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
750 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
751 fepriv->delay = HZ / 2;
752 }
753 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
754 fe->ops.read_status(fe, &s);
755 if (s != fepriv->status) {
756 dvb_frontend_add_event(fe, s); /* update event list */
757 fepriv->status = s;
758 if (!(s & FE_HAS_LOCK)) {
759 fepriv->delay = HZ / 10;
760 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
761 } else {
762 fepriv->delay = 60 * HZ;
763 }
764 }
765 break;
766 default:
767 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
768 break;
769 }
770 } else {
771 dvb_frontend_swzigzag(fe);
772 }
773 }
774
775 if (dvb_powerdown_on_sleep) {
776 if (fe->ops.set_voltage)
777 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
778 if (fe->ops.tuner_ops.sleep) {
779 if (fe->ops.i2c_gate_ctrl)
780 fe->ops.i2c_gate_ctrl(fe, 1);
781 fe->ops.tuner_ops.sleep(fe);
782 if (fe->ops.i2c_gate_ctrl)
783 fe->ops.i2c_gate_ctrl(fe, 0);
784 }
785 if (fe->ops.sleep)
786 fe->ops.sleep(fe);
787 }
788
789 fepriv->thread = NULL;
790 if (kthread_should_stop())
791 fe->exit = DVB_FE_DEVICE_REMOVED;
792 else
793 fe->exit = DVB_FE_NO_EXIT;
794 mb();
795
796 if (semheld)
797 up(&fepriv->sem);
798 dvb_frontend_wakeup(fe);
799 return 0;
800 }
801
802 static void dvb_frontend_stop(struct dvb_frontend *fe)
803 {
804 struct dvb_frontend_private *fepriv = fe->frontend_priv;
805
806 dev_dbg(fe->dvb->device, "%s:\n", __func__);
807
808 if (fe->exit != DVB_FE_DEVICE_REMOVED)
809 fe->exit = DVB_FE_NORMAL_EXIT;
810 mb();
811
812 if (!fepriv->thread)
813 return;
814
815 kthread_stop(fepriv->thread);
816
817 sema_init(&fepriv->sem, 1);
818 fepriv->state = FESTATE_IDLE;
819
820 /* paranoia check in case a signal arrived */
821 if (fepriv->thread)
822 dev_warn(fe->dvb->device,
823 "dvb_frontend_stop: warning: thread %p won't exit\n",
824 fepriv->thread);
825 }
826
827 /*
828 * Sleep for the amount of time given by add_usec parameter
829 *
830 * This needs to be as precise as possible, as it affects the detection of
831 * the dish tone command at the satellite subsystem. The precision is improved
832 * by using a scheduled msleep followed by udelay for the remainder.
833 */
834 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
835 {
836 s32 delta;
837
838 *waketime = ktime_add_us(*waketime, add_usec);
839 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
840 if (delta > 2500) {
841 msleep((delta - 1500) / 1000);
842 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
843 }
844 if (delta > 0)
845 udelay(delta);
846 }
847 EXPORT_SYMBOL(dvb_frontend_sleep_until);
848
849 static int dvb_frontend_start(struct dvb_frontend *fe)
850 {
851 int ret;
852 struct dvb_frontend_private *fepriv = fe->frontend_priv;
853 struct task_struct *fe_thread;
854
855 dev_dbg(fe->dvb->device, "%s:\n", __func__);
856
857 if (fepriv->thread) {
858 if (fe->exit == DVB_FE_NO_EXIT)
859 return 0;
860 else
861 dvb_frontend_stop (fe);
862 }
863
864 if (signal_pending(current))
865 return -EINTR;
866 if (down_interruptible (&fepriv->sem))
867 return -EINTR;
868
869 fepriv->state = FESTATE_IDLE;
870 fe->exit = DVB_FE_NO_EXIT;
871 fepriv->thread = NULL;
872 mb();
873
874 fe_thread = kthread_run(dvb_frontend_thread, fe,
875 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
876 if (IS_ERR(fe_thread)) {
877 ret = PTR_ERR(fe_thread);
878 dev_warn(fe->dvb->device,
879 "dvb_frontend_start: failed to start kthread (%d)\n",
880 ret);
881 up(&fepriv->sem);
882 return ret;
883 }
884 fepriv->thread = fe_thread;
885 return 0;
886 }
887
888 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
889 u32 *freq_min, u32 *freq_max)
890 {
891 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
892
893 if (fe->ops.info.frequency_max == 0)
894 *freq_max = fe->ops.tuner_ops.info.frequency_max;
895 else if (fe->ops.tuner_ops.info.frequency_max == 0)
896 *freq_max = fe->ops.info.frequency_max;
897 else
898 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
899
900 if (*freq_min == 0 || *freq_max == 0)
901 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
902 fe->dvb->num, fe->id);
903 }
904
905 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
906 {
907 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
908 u32 freq_min;
909 u32 freq_max;
910
911 /* range check: frequency */
912 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
913 if ((freq_min && c->frequency < freq_min) ||
914 (freq_max && c->frequency > freq_max)) {
915 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
916 fe->dvb->num, fe->id, c->frequency,
917 freq_min, freq_max);
918 return -EINVAL;
919 }
920
921 /* range check: symbol rate */
922 switch (c->delivery_system) {
923 case SYS_DVBS:
924 case SYS_DVBS2:
925 case SYS_TURBO:
926 case SYS_DVBC_ANNEX_A:
927 case SYS_DVBC_ANNEX_C:
928 if ((fe->ops.info.symbol_rate_min &&
929 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
930 (fe->ops.info.symbol_rate_max &&
931 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
932 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
933 fe->dvb->num, fe->id, c->symbol_rate,
934 fe->ops.info.symbol_rate_min,
935 fe->ops.info.symbol_rate_max);
936 return -EINVAL;
937 }
938 default:
939 break;
940 }
941
942 return 0;
943 }
944
945 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
946 {
947 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
948 int i;
949 u32 delsys;
950
951 delsys = c->delivery_system;
952 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
953 c->delivery_system = delsys;
954
955 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
956 __func__, c->delivery_system);
957
958 c->transmission_mode = TRANSMISSION_MODE_AUTO;
959 c->bandwidth_hz = 0; /* AUTO */
960 c->guard_interval = GUARD_INTERVAL_AUTO;
961 c->hierarchy = HIERARCHY_AUTO;
962 c->symbol_rate = 0;
963 c->code_rate_HP = FEC_AUTO;
964 c->code_rate_LP = FEC_AUTO;
965 c->fec_inner = FEC_AUTO;
966 c->rolloff = ROLLOFF_AUTO;
967 c->voltage = SEC_VOLTAGE_OFF;
968 c->sectone = SEC_TONE_OFF;
969 c->pilot = PILOT_AUTO;
970
971 c->isdbt_partial_reception = 0;
972 c->isdbt_sb_mode = 0;
973 c->isdbt_sb_subchannel = 0;
974 c->isdbt_sb_segment_idx = 0;
975 c->isdbt_sb_segment_count = 0;
976 c->isdbt_layer_enabled = 0;
977 for (i = 0; i < 3; i++) {
978 c->layer[i].fec = FEC_AUTO;
979 c->layer[i].modulation = QAM_AUTO;
980 c->layer[i].interleaving = 0;
981 c->layer[i].segment_count = 0;
982 }
983
984 c->stream_id = NO_STREAM_ID_FILTER;
985 c->scrambling_sequence_index = 0;/* default sequence */
986
987 switch (c->delivery_system) {
988 case SYS_DVBS:
989 case SYS_DVBS2:
990 case SYS_TURBO:
991 c->modulation = QPSK; /* implied for DVB-S in legacy API */
992 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
993 break;
994 case SYS_ATSC:
995 c->modulation = VSB_8;
996 break;
997 case SYS_ISDBS:
998 c->symbol_rate = 28860000;
999 c->rolloff = ROLLOFF_35;
1000 c->bandwidth_hz = c->symbol_rate / 100 * 135;
1001 break;
1002 default:
1003 c->modulation = QAM_AUTO;
1004 break;
1005 }
1006
1007 c->lna = LNA_AUTO;
1008
1009 return 0;
1010 }
1011
1012 #define _DTV_CMD(n, s, b) \
1013 [n] = { \
1014 .name = #n, \
1015 .cmd = n, \
1016 .set = s,\
1017 .buffer = b \
1018 }
1019
1020 struct dtv_cmds_h {
1021 char *name; /* A display name for debugging purposes */
1022
1023 __u32 cmd; /* A unique ID */
1024
1025 /* Flags */
1026 __u32 set:1; /* Either a set or get property */
1027 __u32 buffer:1; /* Does this property use the buffer? */
1028 __u32 reserved:30; /* Align */
1029 };
1030
1031 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1032 _DTV_CMD(DTV_TUNE, 1, 0),
1033 _DTV_CMD(DTV_CLEAR, 1, 0),
1034
1035 /* Set */
1036 _DTV_CMD(DTV_FREQUENCY, 1, 0),
1037 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1038 _DTV_CMD(DTV_MODULATION, 1, 0),
1039 _DTV_CMD(DTV_INVERSION, 1, 0),
1040 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1041 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1042 _DTV_CMD(DTV_INNER_FEC, 1, 0),
1043 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1044 _DTV_CMD(DTV_TONE, 1, 0),
1045 _DTV_CMD(DTV_PILOT, 1, 0),
1046 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1047 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1048 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1049 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1050 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1051 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1052 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1053 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1054
1055 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1056 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1057 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1058 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1059 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1060 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1061 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1062 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1063 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1064 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1065 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1066 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1067 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1068 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1069 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1070 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1071 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1072 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1073
1074 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1075 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1076 _DTV_CMD(DTV_SCRAMBLING_SEQUENCE_INDEX, 1, 0),
1077 _DTV_CMD(DTV_LNA, 1, 0),
1078
1079 /* Get */
1080 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1081 _DTV_CMD(DTV_API_VERSION, 0, 0),
1082
1083 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1084
1085 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1086 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1087
1088 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1089 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1090 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1091 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1092 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1093 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1094 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1095 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1096 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1097 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1098 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1099 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1100 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1101
1102 /* Statistics API */
1103 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1104 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1105 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1106 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1107 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1108 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1109 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1110 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1111 };
1112
1113 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1114 * drivers can use a single set_frontend tuning function, regardless of whether
1115 * it's being used for the legacy or new API, reducing code and complexity.
1116 */
1117 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1118 struct dtv_frontend_properties *c,
1119 const struct dvb_frontend_parameters *p)
1120 {
1121 c->frequency = p->frequency;
1122 c->inversion = p->inversion;
1123
1124 switch (dvbv3_type(c->delivery_system)) {
1125 case DVBV3_QPSK:
1126 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1127 c->symbol_rate = p->u.qpsk.symbol_rate;
1128 c->fec_inner = p->u.qpsk.fec_inner;
1129 break;
1130 case DVBV3_QAM:
1131 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1132 c->symbol_rate = p->u.qam.symbol_rate;
1133 c->fec_inner = p->u.qam.fec_inner;
1134 c->modulation = p->u.qam.modulation;
1135 break;
1136 case DVBV3_OFDM:
1137 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1138
1139 switch (p->u.ofdm.bandwidth) {
1140 case BANDWIDTH_10_MHZ:
1141 c->bandwidth_hz = 10000000;
1142 break;
1143 case BANDWIDTH_8_MHZ:
1144 c->bandwidth_hz = 8000000;
1145 break;
1146 case BANDWIDTH_7_MHZ:
1147 c->bandwidth_hz = 7000000;
1148 break;
1149 case BANDWIDTH_6_MHZ:
1150 c->bandwidth_hz = 6000000;
1151 break;
1152 case BANDWIDTH_5_MHZ:
1153 c->bandwidth_hz = 5000000;
1154 break;
1155 case BANDWIDTH_1_712_MHZ:
1156 c->bandwidth_hz = 1712000;
1157 break;
1158 case BANDWIDTH_AUTO:
1159 c->bandwidth_hz = 0;
1160 }
1161
1162 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1163 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1164 c->modulation = p->u.ofdm.constellation;
1165 c->transmission_mode = p->u.ofdm.transmission_mode;
1166 c->guard_interval = p->u.ofdm.guard_interval;
1167 c->hierarchy = p->u.ofdm.hierarchy_information;
1168 break;
1169 case DVBV3_ATSC:
1170 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1171 c->modulation = p->u.vsb.modulation;
1172 if (c->delivery_system == SYS_ATSCMH)
1173 break;
1174 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1175 c->delivery_system = SYS_ATSC;
1176 else
1177 c->delivery_system = SYS_DVBC_ANNEX_B;
1178 break;
1179 case DVBV3_UNKNOWN:
1180 dev_err(fe->dvb->device,
1181 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1182 __func__, c->delivery_system);
1183 return -EINVAL;
1184 }
1185
1186 return 0;
1187 }
1188
1189 /* Ensure the cached values are set correctly in the frontend
1190 * legacy tuning structures, for the advanced tuning API.
1191 */
1192 static int
1193 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1194 const struct dtv_frontend_properties *c,
1195 struct dvb_frontend_parameters *p)
1196 {
1197 p->frequency = c->frequency;
1198 p->inversion = c->inversion;
1199
1200 switch (dvbv3_type(c->delivery_system)) {
1201 case DVBV3_UNKNOWN:
1202 dev_err(fe->dvb->device,
1203 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1204 __func__, c->delivery_system);
1205 return -EINVAL;
1206 case DVBV3_QPSK:
1207 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1208 p->u.qpsk.symbol_rate = c->symbol_rate;
1209 p->u.qpsk.fec_inner = c->fec_inner;
1210 break;
1211 case DVBV3_QAM:
1212 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1213 p->u.qam.symbol_rate = c->symbol_rate;
1214 p->u.qam.fec_inner = c->fec_inner;
1215 p->u.qam.modulation = c->modulation;
1216 break;
1217 case DVBV3_OFDM:
1218 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1219 switch (c->bandwidth_hz) {
1220 case 10000000:
1221 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1222 break;
1223 case 8000000:
1224 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1225 break;
1226 case 7000000:
1227 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1228 break;
1229 case 6000000:
1230 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1231 break;
1232 case 5000000:
1233 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1234 break;
1235 case 1712000:
1236 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1237 break;
1238 case 0:
1239 default:
1240 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1241 }
1242 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1243 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1244 p->u.ofdm.constellation = c->modulation;
1245 p->u.ofdm.transmission_mode = c->transmission_mode;
1246 p->u.ofdm.guard_interval = c->guard_interval;
1247 p->u.ofdm.hierarchy_information = c->hierarchy;
1248 break;
1249 case DVBV3_ATSC:
1250 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1251 p->u.vsb.modulation = c->modulation;
1252 break;
1253 }
1254 return 0;
1255 }
1256
1257 /**
1258 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1259 * @fe: struct dvb_frontend pointer
1260 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1261 * @p_out: struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1262 *
1263 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1264 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1265 * If p_out is not null, it will update the DVBv3 params pointed by it.
1266 */
1267 static int dtv_get_frontend(struct dvb_frontend *fe,
1268 struct dtv_frontend_properties *c,
1269 struct dvb_frontend_parameters *p_out)
1270 {
1271 int r;
1272
1273 if (fe->ops.get_frontend) {
1274 r = fe->ops.get_frontend(fe, c);
1275 if (unlikely(r < 0))
1276 return r;
1277 if (p_out)
1278 dtv_property_legacy_params_sync(fe, c, p_out);
1279 return 0;
1280 }
1281
1282 /* As everything is in cache, get_frontend fops are always supported */
1283 return 0;
1284 }
1285
1286 static int dvb_frontend_handle_ioctl(struct file *file,
1287 unsigned int cmd, void *parg);
1288
1289 static int dtv_property_process_get(struct dvb_frontend *fe,
1290 const struct dtv_frontend_properties *c,
1291 struct dtv_property *tvp,
1292 struct file *file)
1293 {
1294 int ncaps;
1295
1296 switch(tvp->cmd) {
1297 case DTV_ENUM_DELSYS:
1298 ncaps = 0;
1299 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1300 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1301 ncaps++;
1302 }
1303 tvp->u.buffer.len = ncaps;
1304 break;
1305 case DTV_FREQUENCY:
1306 tvp->u.data = c->frequency;
1307 break;
1308 case DTV_MODULATION:
1309 tvp->u.data = c->modulation;
1310 break;
1311 case DTV_BANDWIDTH_HZ:
1312 tvp->u.data = c->bandwidth_hz;
1313 break;
1314 case DTV_INVERSION:
1315 tvp->u.data = c->inversion;
1316 break;
1317 case DTV_SYMBOL_RATE:
1318 tvp->u.data = c->symbol_rate;
1319 break;
1320 case DTV_INNER_FEC:
1321 tvp->u.data = c->fec_inner;
1322 break;
1323 case DTV_PILOT:
1324 tvp->u.data = c->pilot;
1325 break;
1326 case DTV_ROLLOFF:
1327 tvp->u.data = c->rolloff;
1328 break;
1329 case DTV_DELIVERY_SYSTEM:
1330 tvp->u.data = c->delivery_system;
1331 break;
1332 case DTV_VOLTAGE:
1333 tvp->u.data = c->voltage;
1334 break;
1335 case DTV_TONE:
1336 tvp->u.data = c->sectone;
1337 break;
1338 case DTV_API_VERSION:
1339 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1340 break;
1341 case DTV_CODE_RATE_HP:
1342 tvp->u.data = c->code_rate_HP;
1343 break;
1344 case DTV_CODE_RATE_LP:
1345 tvp->u.data = c->code_rate_LP;
1346 break;
1347 case DTV_GUARD_INTERVAL:
1348 tvp->u.data = c->guard_interval;
1349 break;
1350 case DTV_TRANSMISSION_MODE:
1351 tvp->u.data = c->transmission_mode;
1352 break;
1353 case DTV_HIERARCHY:
1354 tvp->u.data = c->hierarchy;
1355 break;
1356 case DTV_INTERLEAVING:
1357 tvp->u.data = c->interleaving;
1358 break;
1359
1360 /* ISDB-T Support here */
1361 case DTV_ISDBT_PARTIAL_RECEPTION:
1362 tvp->u.data = c->isdbt_partial_reception;
1363 break;
1364 case DTV_ISDBT_SOUND_BROADCASTING:
1365 tvp->u.data = c->isdbt_sb_mode;
1366 break;
1367 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1368 tvp->u.data = c->isdbt_sb_subchannel;
1369 break;
1370 case DTV_ISDBT_SB_SEGMENT_IDX:
1371 tvp->u.data = c->isdbt_sb_segment_idx;
1372 break;
1373 case DTV_ISDBT_SB_SEGMENT_COUNT:
1374 tvp->u.data = c->isdbt_sb_segment_count;
1375 break;
1376 case DTV_ISDBT_LAYER_ENABLED:
1377 tvp->u.data = c->isdbt_layer_enabled;
1378 break;
1379 case DTV_ISDBT_LAYERA_FEC:
1380 tvp->u.data = c->layer[0].fec;
1381 break;
1382 case DTV_ISDBT_LAYERA_MODULATION:
1383 tvp->u.data = c->layer[0].modulation;
1384 break;
1385 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1386 tvp->u.data = c->layer[0].segment_count;
1387 break;
1388 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1389 tvp->u.data = c->layer[0].interleaving;
1390 break;
1391 case DTV_ISDBT_LAYERB_FEC:
1392 tvp->u.data = c->layer[1].fec;
1393 break;
1394 case DTV_ISDBT_LAYERB_MODULATION:
1395 tvp->u.data = c->layer[1].modulation;
1396 break;
1397 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1398 tvp->u.data = c->layer[1].segment_count;
1399 break;
1400 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1401 tvp->u.data = c->layer[1].interleaving;
1402 break;
1403 case DTV_ISDBT_LAYERC_FEC:
1404 tvp->u.data = c->layer[2].fec;
1405 break;
1406 case DTV_ISDBT_LAYERC_MODULATION:
1407 tvp->u.data = c->layer[2].modulation;
1408 break;
1409 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1410 tvp->u.data = c->layer[2].segment_count;
1411 break;
1412 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1413 tvp->u.data = c->layer[2].interleaving;
1414 break;
1415
1416 /* Multistream support */
1417 case DTV_STREAM_ID:
1418 case DTV_DVBT2_PLP_ID_LEGACY:
1419 tvp->u.data = c->stream_id;
1420 break;
1421
1422 /* Physical layer scrambling support */
1423 case DTV_SCRAMBLING_SEQUENCE_INDEX:
1424 tvp->u.data = c->scrambling_sequence_index;
1425 break;
1426
1427 /* ATSC-MH */
1428 case DTV_ATSCMH_FIC_VER:
1429 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1430 break;
1431 case DTV_ATSCMH_PARADE_ID:
1432 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1433 break;
1434 case DTV_ATSCMH_NOG:
1435 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1436 break;
1437 case DTV_ATSCMH_TNOG:
1438 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1439 break;
1440 case DTV_ATSCMH_SGN:
1441 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1442 break;
1443 case DTV_ATSCMH_PRC:
1444 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1445 break;
1446 case DTV_ATSCMH_RS_FRAME_MODE:
1447 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1448 break;
1449 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1450 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1451 break;
1452 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1453 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1454 break;
1455 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1456 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1457 break;
1458 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1459 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1460 break;
1461 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1462 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1463 break;
1464 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1465 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1466 break;
1467 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1468 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1469 break;
1470 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1471 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1472 break;
1473
1474 case DTV_LNA:
1475 tvp->u.data = c->lna;
1476 break;
1477
1478 /* Fill quality measures */
1479 case DTV_STAT_SIGNAL_STRENGTH:
1480 tvp->u.st = c->strength;
1481 break;
1482 case DTV_STAT_CNR:
1483 tvp->u.st = c->cnr;
1484 break;
1485 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1486 tvp->u.st = c->pre_bit_error;
1487 break;
1488 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1489 tvp->u.st = c->pre_bit_count;
1490 break;
1491 case DTV_STAT_POST_ERROR_BIT_COUNT:
1492 tvp->u.st = c->post_bit_error;
1493 break;
1494 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1495 tvp->u.st = c->post_bit_count;
1496 break;
1497 case DTV_STAT_ERROR_BLOCK_COUNT:
1498 tvp->u.st = c->block_error;
1499 break;
1500 case DTV_STAT_TOTAL_BLOCK_COUNT:
1501 tvp->u.st = c->block_count;
1502 break;
1503 default:
1504 dev_dbg(fe->dvb->device,
1505 "%s: FE property %d doesn't exist\n",
1506 __func__, tvp->cmd);
1507 return -EINVAL;
1508 }
1509
1510 if (!dtv_cmds[tvp->cmd].buffer)
1511 dev_dbg(fe->dvb->device,
1512 "%s: GET cmd 0x%08x (%s) = 0x%08x\n",
1513 __func__, tvp->cmd, dtv_cmds[tvp->cmd].name,
1514 tvp->u.data);
1515 else
1516 dev_dbg(fe->dvb->device,
1517 "%s: GET cmd 0x%08x (%s) len %d: %*ph\n",
1518 __func__,
1519 tvp->cmd, dtv_cmds[tvp->cmd].name,
1520 tvp->u.buffer.len,
1521 tvp->u.buffer.len, tvp->u.buffer.data);
1522
1523 return 0;
1524 }
1525
1526 static int dtv_set_frontend(struct dvb_frontend *fe);
1527
1528 static bool is_dvbv3_delsys(u32 delsys)
1529 {
1530 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1531 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1532 }
1533
1534 /**
1535 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1536 * @fe: struct frontend;
1537 * @delsys: DVBv5 type that will be used for emulation
1538 *
1539 * Provides emulation for delivery systems that are compatible with the old
1540 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1541 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1542 * parameters are compatible with DVB-S spec.
1543 */
1544 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1545 {
1546 int i;
1547 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1548
1549 c->delivery_system = delsys;
1550
1551 /*
1552 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1553 */
1554 if (c->delivery_system == SYS_ISDBT) {
1555 dev_dbg(fe->dvb->device,
1556 "%s: Using defaults for SYS_ISDBT\n",
1557 __func__);
1558
1559 if (!c->bandwidth_hz)
1560 c->bandwidth_hz = 6000000;
1561
1562 c->isdbt_partial_reception = 0;
1563 c->isdbt_sb_mode = 0;
1564 c->isdbt_sb_subchannel = 0;
1565 c->isdbt_sb_segment_idx = 0;
1566 c->isdbt_sb_segment_count = 0;
1567 c->isdbt_layer_enabled = 7;
1568 for (i = 0; i < 3; i++) {
1569 c->layer[i].fec = FEC_AUTO;
1570 c->layer[i].modulation = QAM_AUTO;
1571 c->layer[i].interleaving = 0;
1572 c->layer[i].segment_count = 0;
1573 }
1574 }
1575 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1576 __func__, c->delivery_system);
1577
1578 return 0;
1579 }
1580
1581 /**
1582 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1583 * @fe: frontend struct
1584 * @desired_system: delivery system requested by the user
1585 *
1586 * A DVBv5 call know what's the desired system it wants. So, set it.
1587 *
1588 * There are, however, a few known issues with early DVBv5 applications that
1589 * are also handled by this logic:
1590 *
1591 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1592 * This is an API violation, but, as we don't want to break userspace,
1593 * convert it to the first supported delivery system.
1594 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1595 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1596 * ISDB-T provided backward compat with DVB-T.
1597 */
1598 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1599 u32 desired_system)
1600 {
1601 int ncaps;
1602 u32 delsys = SYS_UNDEFINED;
1603 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1604 enum dvbv3_emulation_type type;
1605
1606 /*
1607 * It was reported that some old DVBv5 applications were
1608 * filling delivery_system with SYS_UNDEFINED. If this happens,
1609 * assume that the application wants to use the first supported
1610 * delivery system.
1611 */
1612 if (desired_system == SYS_UNDEFINED)
1613 desired_system = fe->ops.delsys[0];
1614
1615 /*
1616 * This is a DVBv5 call. So, it likely knows the supported
1617 * delivery systems. So, check if the desired delivery system is
1618 * supported
1619 */
1620 ncaps = 0;
1621 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1622 if (fe->ops.delsys[ncaps] == desired_system) {
1623 c->delivery_system = desired_system;
1624 dev_dbg(fe->dvb->device,
1625 "%s: Changing delivery system to %d\n",
1626 __func__, desired_system);
1627 return 0;
1628 }
1629 ncaps++;
1630 }
1631
1632 /*
1633 * The requested delivery system isn't supported. Maybe userspace
1634 * is requesting a DVBv3 compatible delivery system.
1635 *
1636 * The emulation only works if the desired system is one of the
1637 * delivery systems supported by DVBv3 API
1638 */
1639 if (!is_dvbv3_delsys(desired_system)) {
1640 dev_dbg(fe->dvb->device,
1641 "%s: Delivery system %d not supported.\n",
1642 __func__, desired_system);
1643 return -EINVAL;
1644 }
1645
1646 type = dvbv3_type(desired_system);
1647
1648 /*
1649 * Get the last non-DVBv3 delivery system that has the same type
1650 * of the desired system
1651 */
1652 ncaps = 0;
1653 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1654 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1655 delsys = fe->ops.delsys[ncaps];
1656 ncaps++;
1657 }
1658
1659 /* There's nothing compatible with the desired delivery system */
1660 if (delsys == SYS_UNDEFINED) {
1661 dev_dbg(fe->dvb->device,
1662 "%s: Delivery system %d not supported on emulation mode.\n",
1663 __func__, desired_system);
1664 return -EINVAL;
1665 }
1666
1667 dev_dbg(fe->dvb->device,
1668 "%s: Using delivery system %d emulated as if it were %d\n",
1669 __func__, delsys, desired_system);
1670
1671 return emulate_delivery_system(fe, desired_system);
1672 }
1673
1674 /**
1675 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1676 * @fe: frontend struct
1677 *
1678 * A DVBv3 call doesn't know what's the desired system it wants. It also
1679 * doesn't allow to switch between different types. Due to that, userspace
1680 * should use DVBv5 instead.
1681 * However, in order to avoid breaking userspace API, limited backward
1682 * compatibility support is provided.
1683 *
1684 * There are some delivery systems that are incompatible with DVBv3 calls.
1685 *
1686 * This routine should work fine for frontends that support just one delivery
1687 * system.
1688 *
1689 * For frontends that support multiple frontends:
1690 * 1) It defaults to use the first supported delivery system. There's an
1691 * userspace application that allows changing it at runtime;
1692 *
1693 * 2) If the current delivery system is not compatible with DVBv3, it gets
1694 * the first one that it is compatible.
1695 *
1696 * NOTE: in order for this to work with applications like Kaffeine that
1697 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1698 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1699 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1700 * to DVB-S.
1701 */
1702 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1703 {
1704 int ncaps;
1705 u32 delsys = SYS_UNDEFINED;
1706 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1707
1708 /* If not set yet, defaults to the first supported delivery system */
1709 if (c->delivery_system == SYS_UNDEFINED)
1710 c->delivery_system = fe->ops.delsys[0];
1711
1712 /*
1713 * Trivial case: just use the current one, if it already a DVBv3
1714 * delivery system
1715 */
1716 if (is_dvbv3_delsys(c->delivery_system)) {
1717 dev_dbg(fe->dvb->device,
1718 "%s: Using delivery system to %d\n",
1719 __func__, c->delivery_system);
1720 return 0;
1721 }
1722
1723 /*
1724 * Seek for the first delivery system that it is compatible with a
1725 * DVBv3 standard
1726 */
1727 ncaps = 0;
1728 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1729 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1730 delsys = fe->ops.delsys[ncaps];
1731 break;
1732 }
1733 ncaps++;
1734 }
1735 if (delsys == SYS_UNDEFINED) {
1736 dev_dbg(fe->dvb->device,
1737 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1738 __func__);
1739 return -EINVAL;
1740 }
1741 return emulate_delivery_system(fe, delsys);
1742 }
1743
1744 /**
1745 * dtv_property_process_set - Sets a single DTV property
1746 * @fe: Pointer to &struct dvb_frontend
1747 * @file: Pointer to &struct file
1748 * @cmd: Digital TV command
1749 * @data: An unsigned 32-bits number
1750 *
1751 * This routine assigns the property
1752 * value to the corresponding member of
1753 * &struct dtv_frontend_properties
1754 *
1755 * Returns:
1756 * Zero on success, negative errno on failure.
1757 */
1758 static int dtv_property_process_set(struct dvb_frontend *fe,
1759 struct file *file,
1760 u32 cmd, u32 data)
1761 {
1762 int r = 0;
1763 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1764
1765 /** Dump DTV command name and value*/
1766 if (!cmd || cmd > DTV_MAX_COMMAND)
1767 dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n",
1768 __func__, cmd);
1769 else
1770 dev_dbg(fe->dvb->device,
1771 "%s: SET cmd 0x%08x (%s) to 0x%08x\n",
1772 __func__, cmd, dtv_cmds[cmd].name, data);
1773 switch (cmd) {
1774 case DTV_CLEAR:
1775 /*
1776 * Reset a cache of data specific to the frontend here. This does
1777 * not effect hardware.
1778 */
1779 dvb_frontend_clear_cache(fe);
1780 break;
1781 case DTV_TUNE:
1782 /*
1783 * Use the cached Digital TV properties to tune the
1784 * frontend
1785 */
1786 dev_dbg(fe->dvb->device,
1787 "%s: Setting the frontend from property cache\n",
1788 __func__);
1789
1790 r = dtv_set_frontend(fe);
1791 break;
1792 case DTV_FREQUENCY:
1793 c->frequency = data;
1794 break;
1795 case DTV_MODULATION:
1796 c->modulation = data;
1797 break;
1798 case DTV_BANDWIDTH_HZ:
1799 c->bandwidth_hz = data;
1800 break;
1801 case DTV_INVERSION:
1802 c->inversion = data;
1803 break;
1804 case DTV_SYMBOL_RATE:
1805 c->symbol_rate = data;
1806 break;
1807 case DTV_INNER_FEC:
1808 c->fec_inner = data;
1809 break;
1810 case DTV_PILOT:
1811 c->pilot = data;
1812 break;
1813 case DTV_ROLLOFF:
1814 c->rolloff = data;
1815 break;
1816 case DTV_DELIVERY_SYSTEM:
1817 r = dvbv5_set_delivery_system(fe, data);
1818 break;
1819 case DTV_VOLTAGE:
1820 c->voltage = data;
1821 r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
1822 (void *)c->voltage);
1823 break;
1824 case DTV_TONE:
1825 c->sectone = data;
1826 r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
1827 (void *)c->sectone);
1828 break;
1829 case DTV_CODE_RATE_HP:
1830 c->code_rate_HP = data;
1831 break;
1832 case DTV_CODE_RATE_LP:
1833 c->code_rate_LP = data;
1834 break;
1835 case DTV_GUARD_INTERVAL:
1836 c->guard_interval = data;
1837 break;
1838 case DTV_TRANSMISSION_MODE:
1839 c->transmission_mode = data;
1840 break;
1841 case DTV_HIERARCHY:
1842 c->hierarchy = data;
1843 break;
1844 case DTV_INTERLEAVING:
1845 c->interleaving = data;
1846 break;
1847
1848 /* ISDB-T Support here */
1849 case DTV_ISDBT_PARTIAL_RECEPTION:
1850 c->isdbt_partial_reception = data;
1851 break;
1852 case DTV_ISDBT_SOUND_BROADCASTING:
1853 c->isdbt_sb_mode = data;
1854 break;
1855 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1856 c->isdbt_sb_subchannel = data;
1857 break;
1858 case DTV_ISDBT_SB_SEGMENT_IDX:
1859 c->isdbt_sb_segment_idx = data;
1860 break;
1861 case DTV_ISDBT_SB_SEGMENT_COUNT:
1862 c->isdbt_sb_segment_count = data;
1863 break;
1864 case DTV_ISDBT_LAYER_ENABLED:
1865 c->isdbt_layer_enabled = data;
1866 break;
1867 case DTV_ISDBT_LAYERA_FEC:
1868 c->layer[0].fec = data;
1869 break;
1870 case DTV_ISDBT_LAYERA_MODULATION:
1871 c->layer[0].modulation = data;
1872 break;
1873 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1874 c->layer[0].segment_count = data;
1875 break;
1876 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1877 c->layer[0].interleaving = data;
1878 break;
1879 case DTV_ISDBT_LAYERB_FEC:
1880 c->layer[1].fec = data;
1881 break;
1882 case DTV_ISDBT_LAYERB_MODULATION:
1883 c->layer[1].modulation = data;
1884 break;
1885 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1886 c->layer[1].segment_count = data;
1887 break;
1888 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1889 c->layer[1].interleaving = data;
1890 break;
1891 case DTV_ISDBT_LAYERC_FEC:
1892 c->layer[2].fec = data;
1893 break;
1894 case DTV_ISDBT_LAYERC_MODULATION:
1895 c->layer[2].modulation = data;
1896 break;
1897 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1898 c->layer[2].segment_count = data;
1899 break;
1900 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1901 c->layer[2].interleaving = data;
1902 break;
1903
1904 /* Multistream support */
1905 case DTV_STREAM_ID:
1906 case DTV_DVBT2_PLP_ID_LEGACY:
1907 c->stream_id = data;
1908 break;
1909
1910 /* Physical layer scrambling support */
1911 case DTV_SCRAMBLING_SEQUENCE_INDEX:
1912 c->scrambling_sequence_index = data;
1913 break;
1914
1915 /* ATSC-MH */
1916 case DTV_ATSCMH_PARADE_ID:
1917 fe->dtv_property_cache.atscmh_parade_id = data;
1918 break;
1919 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1920 fe->dtv_property_cache.atscmh_rs_frame_ensemble = data;
1921 break;
1922
1923 case DTV_LNA:
1924 c->lna = data;
1925 if (fe->ops.set_lna)
1926 r = fe->ops.set_lna(fe);
1927 if (r < 0)
1928 c->lna = LNA_AUTO;
1929 break;
1930
1931 default:
1932 return -EINVAL;
1933 }
1934
1935 return r;
1936 }
1937
1938 static int dvb_frontend_do_ioctl(struct file *file, unsigned int cmd,
1939 void *parg)
1940 {
1941 struct dvb_device *dvbdev = file->private_data;
1942 struct dvb_frontend *fe = dvbdev->priv;
1943 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1944 int err;
1945
1946 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1947 if (down_interruptible(&fepriv->sem))
1948 return -ERESTARTSYS;
1949
1950 if (fe->exit != DVB_FE_NO_EXIT) {
1951 up(&fepriv->sem);
1952 return -ENODEV;
1953 }
1954
1955 /*
1956 * If the frontend is opened in read-only mode, only the ioctls
1957 * that don't interfere with the tune logic should be accepted.
1958 * That allows an external application to monitor the DVB QoS and
1959 * statistics parameters.
1960 *
1961 * That matches all _IOR() ioctls, except for two special cases:
1962 * - FE_GET_EVENT is part of the tuning logic on a DVB application;
1963 * - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0
1964 * setup
1965 * So, those two ioctls should also return -EPERM, as otherwise
1966 * reading from them would interfere with a DVB tune application
1967 */
1968 if ((file->f_flags & O_ACCMODE) == O_RDONLY
1969 && (_IOC_DIR(cmd) != _IOC_READ
1970 || cmd == FE_GET_EVENT
1971 || cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1972 up(&fepriv->sem);
1973 return -EPERM;
1974 }
1975
1976 err = dvb_frontend_handle_ioctl(file, cmd, parg);
1977
1978 up(&fepriv->sem);
1979 return err;
1980 }
1981
1982 static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
1983 unsigned long arg)
1984 {
1985 struct dvb_device *dvbdev = file->private_data;
1986
1987 if (!dvbdev)
1988 return -ENODEV;
1989
1990 return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
1991 }
1992
1993 #ifdef CONFIG_COMPAT
1994 struct compat_dtv_property {
1995 __u32 cmd;
1996 __u32 reserved[3];
1997 union {
1998 __u32 data;
1999 struct dtv_fe_stats st;
2000 struct {
2001 __u8 data[32];
2002 __u32 len;
2003 __u32 reserved1[3];
2004 compat_uptr_t reserved2;
2005 } buffer;
2006 } u;
2007 int result;
2008 } __attribute__ ((packed));
2009
2010 struct compat_dtv_properties {
2011 __u32 num;
2012 compat_uptr_t props;
2013 };
2014
2015 #define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties)
2016 #define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties)
2017
2018 static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd,
2019 unsigned long arg)
2020 {
2021 struct dvb_device *dvbdev = file->private_data;
2022 struct dvb_frontend *fe = dvbdev->priv;
2023 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2024 int i, err = 0;
2025
2026 if (cmd == COMPAT_FE_SET_PROPERTY) {
2027 struct compat_dtv_properties prop, *tvps = NULL;
2028 struct compat_dtv_property *tvp = NULL;
2029
2030 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2031 return -EFAULT;
2032
2033 tvps = &prop;
2034
2035 /*
2036 * Put an arbitrary limit on the number of messages that can
2037 * be sent at once
2038 */
2039 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2040 return -EINVAL;
2041
2042 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2043 if (IS_ERR(tvp))
2044 return PTR_ERR(tvp);
2045
2046 for (i = 0; i < tvps->num; i++) {
2047 err = dtv_property_process_set(fe, file,
2048 (tvp + i)->cmd,
2049 (tvp + i)->u.data);
2050 if (err < 0) {
2051 kfree(tvp);
2052 return err;
2053 }
2054 }
2055 kfree(tvp);
2056 } else if (cmd == COMPAT_FE_GET_PROPERTY) {
2057 struct compat_dtv_properties prop, *tvps = NULL;
2058 struct compat_dtv_property *tvp = NULL;
2059 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2060
2061 if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
2062 return -EFAULT;
2063
2064 tvps = &prop;
2065
2066 /*
2067 * Put an arbitrary limit on the number of messages that can
2068 * be sent at once
2069 */
2070 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2071 return -EINVAL;
2072
2073 tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
2074 if (IS_ERR(tvp))
2075 return PTR_ERR(tvp);
2076
2077 /*
2078 * Let's use our own copy of property cache, in order to
2079 * avoid mangling with DTV zigzag logic, as drivers might
2080 * return crap, if they don't check if the data is available
2081 * before updating the properties cache.
2082 */
2083 if (fepriv->state != FESTATE_IDLE) {
2084 err = dtv_get_frontend(fe, &getp, NULL);
2085 if (err < 0) {
2086 kfree(tvp);
2087 return err;
2088 }
2089 }
2090 for (i = 0; i < tvps->num; i++) {
2091 err = dtv_property_process_get(
2092 fe, &getp, (struct dtv_property *)tvp + i, file);
2093 if (err < 0) {
2094 kfree(tvp);
2095 return err;
2096 }
2097 }
2098
2099 if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp,
2100 tvps->num * sizeof(struct compat_dtv_property))) {
2101 kfree(tvp);
2102 return -EFAULT;
2103 }
2104 kfree(tvp);
2105 }
2106
2107 return err;
2108 }
2109
2110 static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd,
2111 unsigned long arg)
2112 {
2113 struct dvb_device *dvbdev = file->private_data;
2114 struct dvb_frontend *fe = dvbdev->priv;
2115 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2116 int err;
2117
2118 if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) {
2119 if (down_interruptible(&fepriv->sem))
2120 return -ERESTARTSYS;
2121
2122 err = dvb_frontend_handle_compat_ioctl(file, cmd, arg);
2123
2124 up(&fepriv->sem);
2125 return err;
2126 }
2127
2128 return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
2129 }
2130 #endif
2131
2132 static int dtv_set_frontend(struct dvb_frontend *fe)
2133 {
2134 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2135 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2136 struct dvb_frontend_tune_settings fetunesettings;
2137 u32 rolloff = 0;
2138
2139 if (dvb_frontend_check_parameters(fe) < 0)
2140 return -EINVAL;
2141
2142 /*
2143 * Initialize output parameters to match the values given by
2144 * the user. FE_SET_FRONTEND triggers an initial frontend event
2145 * with status = 0, which copies output parameters to userspace.
2146 */
2147 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2148
2149 /*
2150 * Be sure that the bandwidth will be filled for all
2151 * non-satellite systems, as tuners need to know what
2152 * low pass/Nyquist half filter should be applied, in
2153 * order to avoid inter-channel noise.
2154 *
2155 * ISDB-T and DVB-T/T2 already sets bandwidth.
2156 * ATSC and DVB-C don't set, so, the core should fill it.
2157 *
2158 * On DVB-C Annex A and C, the bandwidth is a function of
2159 * the roll-off and symbol rate. Annex B defines different
2160 * roll-off factors depending on the modulation. Fortunately,
2161 * Annex B is only used with 6MHz, so there's no need to
2162 * calculate it.
2163 *
2164 * While not officially supported, a side effect of handling it at
2165 * the cache level is that a program could retrieve the bandwidth
2166 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2167 */
2168 switch (c->delivery_system) {
2169 case SYS_ATSC:
2170 case SYS_DVBC_ANNEX_B:
2171 c->bandwidth_hz = 6000000;
2172 break;
2173 case SYS_DVBC_ANNEX_A:
2174 rolloff = 115;
2175 break;
2176 case SYS_DVBC_ANNEX_C:
2177 rolloff = 113;
2178 break;
2179 case SYS_DVBS:
2180 case SYS_TURBO:
2181 case SYS_ISDBS:
2182 rolloff = 135;
2183 break;
2184 case SYS_DVBS2:
2185 switch (c->rolloff) {
2186 case ROLLOFF_20:
2187 rolloff = 120;
2188 break;
2189 case ROLLOFF_25:
2190 rolloff = 125;
2191 break;
2192 default:
2193 case ROLLOFF_35:
2194 rolloff = 135;
2195 }
2196 break;
2197 default:
2198 break;
2199 }
2200 if (rolloff)
2201 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2202
2203 /* force auto frequency inversion if requested */
2204 if (dvb_force_auto_inversion)
2205 c->inversion = INVERSION_AUTO;
2206
2207 /*
2208 * without hierarchical coding code_rate_LP is irrelevant,
2209 * so we tolerate the otherwise invalid FEC_NONE setting
2210 */
2211 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2212 c->code_rate_LP = FEC_AUTO;
2213
2214 /* get frontend-specific tuning settings */
2215 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2216 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2217 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2218 fepriv->max_drift = fetunesettings.max_drift;
2219 fepriv->step_size = fetunesettings.step_size;
2220 } else {
2221 /* default values */
2222 switch (c->delivery_system) {
2223 case SYS_DVBS:
2224 case SYS_DVBS2:
2225 case SYS_ISDBS:
2226 case SYS_TURBO:
2227 case SYS_DVBC_ANNEX_A:
2228 case SYS_DVBC_ANNEX_C:
2229 fepriv->min_delay = HZ / 20;
2230 fepriv->step_size = c->symbol_rate / 16000;
2231 fepriv->max_drift = c->symbol_rate / 2000;
2232 break;
2233 case SYS_DVBT:
2234 case SYS_DVBT2:
2235 case SYS_ISDBT:
2236 case SYS_DTMB:
2237 fepriv->min_delay = HZ / 20;
2238 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2239 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2240 break;
2241 default:
2242 /*
2243 * FIXME: This sounds wrong! if freqency_stepsize is
2244 * defined by the frontend, why not use it???
2245 */
2246 fepriv->min_delay = HZ / 20;
2247 fepriv->step_size = 0; /* no zigzag */
2248 fepriv->max_drift = 0;
2249 break;
2250 }
2251 }
2252 if (dvb_override_tune_delay > 0)
2253 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2254
2255 fepriv->state = FESTATE_RETUNE;
2256
2257 /* Request the search algorithm to search */
2258 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2259
2260 dvb_frontend_clear_events(fe);
2261 dvb_frontend_add_event(fe, 0);
2262 dvb_frontend_wakeup(fe);
2263 fepriv->status = 0;
2264
2265 return 0;
2266 }
2267
2268
2269 static int dvb_frontend_handle_ioctl(struct file *file,
2270 unsigned int cmd, void *parg)
2271 {
2272 struct dvb_device *dvbdev = file->private_data;
2273 struct dvb_frontend *fe = dvbdev->priv;
2274 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2275 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2276 int i, err = -ENOTSUPP;
2277
2278 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2279
2280 switch (cmd) {
2281 case FE_SET_PROPERTY: {
2282 struct dtv_properties *tvps = parg;
2283 struct dtv_property *tvp = NULL;
2284
2285 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2286 __func__, tvps->num);
2287 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2288 __func__, tvps->props);
2289
2290 /*
2291 * Put an arbitrary limit on the number of messages that can
2292 * be sent at once
2293 */
2294 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2295 return -EINVAL;
2296
2297 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2298 if (IS_ERR(tvp))
2299 return PTR_ERR(tvp);
2300
2301 for (i = 0; i < tvps->num; i++) {
2302 err = dtv_property_process_set(fe, file,
2303 (tvp + i)->cmd,
2304 (tvp + i)->u.data);
2305 if (err < 0) {
2306 kfree(tvp);
2307 return err;
2308 }
2309 }
2310 kfree(tvp);
2311 err = 0;
2312 break;
2313 }
2314 case FE_GET_PROPERTY: {
2315 struct dtv_properties *tvps = parg;
2316 struct dtv_property *tvp = NULL;
2317 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2318
2319 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2320 __func__, tvps->num);
2321 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2322 __func__, tvps->props);
2323
2324 /*
2325 * Put an arbitrary limit on the number of messages that can
2326 * be sent at once
2327 */
2328 if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2329 return -EINVAL;
2330
2331 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2332 if (IS_ERR(tvp))
2333 return PTR_ERR(tvp);
2334
2335 /*
2336 * Let's use our own copy of property cache, in order to
2337 * avoid mangling with DTV zigzag logic, as drivers might
2338 * return crap, if they don't check if the data is available
2339 * before updating the properties cache.
2340 */
2341 if (fepriv->state != FESTATE_IDLE) {
2342 err = dtv_get_frontend(fe, &getp, NULL);
2343 if (err < 0) {
2344 kfree(tvp);
2345 return err;
2346 }
2347 }
2348 for (i = 0; i < tvps->num; i++) {
2349 err = dtv_property_process_get(fe, &getp,
2350 tvp + i, file);
2351 if (err < 0) {
2352 kfree(tvp);
2353 return err;
2354 }
2355 }
2356
2357 if (copy_to_user((void __user *)tvps->props, tvp,
2358 tvps->num * sizeof(struct dtv_property))) {
2359 kfree(tvp);
2360 return -EFAULT;
2361 }
2362 kfree(tvp);
2363 err = 0;
2364 break;
2365 }
2366
2367 case FE_GET_INFO: {
2368 struct dvb_frontend_info* info = parg;
2369
2370 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2371 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2372
2373 /*
2374 * Associate the 4 delivery systems supported by DVBv3
2375 * API with their DVBv5 counterpart. For the other standards,
2376 * use the closest type, assuming that it would hopefully
2377 * work with a DVBv3 application.
2378 * It should be noticed that, on multi-frontend devices with
2379 * different types (terrestrial and cable, for example),
2380 * a pure DVBv3 application won't be able to use all delivery
2381 * systems. Yet, changing the DVBv5 cache to the other delivery
2382 * system should be enough for making it work.
2383 */
2384 switch (dvbv3_type(c->delivery_system)) {
2385 case DVBV3_QPSK:
2386 info->type = FE_QPSK;
2387 break;
2388 case DVBV3_ATSC:
2389 info->type = FE_ATSC;
2390 break;
2391 case DVBV3_QAM:
2392 info->type = FE_QAM;
2393 break;
2394 case DVBV3_OFDM:
2395 info->type = FE_OFDM;
2396 break;
2397 default:
2398 dev_err(fe->dvb->device,
2399 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2400 __func__, c->delivery_system);
2401 fe->ops.info.type = FE_OFDM;
2402 }
2403 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2404 __func__, c->delivery_system, fe->ops.info.type);
2405
2406 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2407 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2408 info->caps |= FE_CAN_INVERSION_AUTO;
2409 err = 0;
2410 break;
2411 }
2412
2413 case FE_READ_STATUS: {
2414 enum fe_status *status = parg;
2415
2416 /* if retune was requested but hasn't occurred yet, prevent
2417 * that user get signal state from previous tuning */
2418 if (fepriv->state == FESTATE_RETUNE ||
2419 fepriv->state == FESTATE_ERROR) {
2420 err=0;
2421 *status = 0;
2422 break;
2423 }
2424
2425 if (fe->ops.read_status)
2426 err = fe->ops.read_status(fe, status);
2427 break;
2428 }
2429
2430 case FE_DISEQC_RESET_OVERLOAD:
2431 if (fe->ops.diseqc_reset_overload) {
2432 err = fe->ops.diseqc_reset_overload(fe);
2433 fepriv->state = FESTATE_DISEQC;
2434 fepriv->status = 0;
2435 }
2436 break;
2437
2438 case FE_DISEQC_SEND_MASTER_CMD:
2439 if (fe->ops.diseqc_send_master_cmd) {
2440 struct dvb_diseqc_master_cmd *cmd = parg;
2441
2442 if (cmd->msg_len > sizeof(cmd->msg)) {
2443 err = -EINVAL;
2444 break;
2445 }
2446 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2447 fepriv->state = FESTATE_DISEQC;
2448 fepriv->status = 0;
2449 }
2450 break;
2451
2452 case FE_DISEQC_SEND_BURST:
2453 if (fe->ops.diseqc_send_burst) {
2454 err = fe->ops.diseqc_send_burst(fe,
2455 (enum fe_sec_mini_cmd)parg);
2456 fepriv->state = FESTATE_DISEQC;
2457 fepriv->status = 0;
2458 }
2459 break;
2460
2461 case FE_SET_TONE:
2462 if (fe->ops.set_tone) {
2463 err = fe->ops.set_tone(fe,
2464 (enum fe_sec_tone_mode)parg);
2465 fepriv->tone = (enum fe_sec_tone_mode)parg;
2466 fepriv->state = FESTATE_DISEQC;
2467 fepriv->status = 0;
2468 }
2469 break;
2470
2471 case FE_SET_VOLTAGE:
2472 if (fe->ops.set_voltage) {
2473 err = fe->ops.set_voltage(fe,
2474 (enum fe_sec_voltage)parg);
2475 fepriv->voltage = (enum fe_sec_voltage)parg;
2476 fepriv->state = FESTATE_DISEQC;
2477 fepriv->status = 0;
2478 }
2479 break;
2480
2481 case FE_DISEQC_RECV_SLAVE_REPLY:
2482 if (fe->ops.diseqc_recv_slave_reply)
2483 err = fe->ops.diseqc_recv_slave_reply(fe, parg);
2484 break;
2485
2486 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2487 if (fe->ops.enable_high_lnb_voltage)
2488 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2489 break;
2490
2491 case FE_SET_FRONTEND_TUNE_MODE:
2492 fepriv->tune_mode_flags = (unsigned long) parg;
2493 err = 0;
2494 break;
2495
2496 /* DEPRECATED dish control ioctls */
2497
2498 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2499 if (fe->ops.dishnetwork_send_legacy_command) {
2500 err = fe->ops.dishnetwork_send_legacy_command(fe,
2501 (unsigned long)parg);
2502 fepriv->state = FESTATE_DISEQC;
2503 fepriv->status = 0;
2504 } else if (fe->ops.set_voltage) {
2505 /*
2506 * NOTE: This is a fallback condition. Some frontends
2507 * (stv0299 for instance) take longer than 8msec to
2508 * respond to a set_voltage command. Those switches
2509 * need custom routines to switch properly. For all
2510 * other frontends, the following should work ok.
2511 * Dish network legacy switches (as used by Dish500)
2512 * are controlled by sending 9-bit command words
2513 * spaced 8msec apart.
2514 * the actual command word is switch/port dependent
2515 * so it is up to the userspace application to send
2516 * the right command.
2517 * The command must always start with a '0' after
2518 * initialization, so parg is 8 bits and does not
2519 * include the initialization or start bit
2520 */
2521 unsigned long swcmd = ((unsigned long) parg) << 1;
2522 ktime_t nexttime;
2523 ktime_t tv[10];
2524 int i;
2525 u8 last = 1;
2526 if (dvb_frontend_debug)
2527 dprintk("%s switch command: 0x%04lx\n",
2528 __func__, swcmd);
2529 nexttime = ktime_get_boottime();
2530 if (dvb_frontend_debug)
2531 tv[0] = nexttime;
2532 /* before sending a command, initialize by sending
2533 * a 32ms 18V to the switch
2534 */
2535 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2536 dvb_frontend_sleep_until(&nexttime, 32000);
2537
2538 for (i = 0; i < 9; i++) {
2539 if (dvb_frontend_debug)
2540 tv[i+1] = ktime_get_boottime();
2541 if ((swcmd & 0x01) != last) {
2542 /* set voltage to (last ? 13V : 18V) */
2543 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2544 last = (last) ? 0 : 1;
2545 }
2546 swcmd = swcmd >> 1;
2547 if (i != 8)
2548 dvb_frontend_sleep_until(&nexttime, 8000);
2549 }
2550 if (dvb_frontend_debug) {
2551 dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n",
2552 __func__, fe->dvb->num);
2553 for (i = 1; i < 10; i++)
2554 pr_info("%d: %d\n", i,
2555 (int) ktime_us_delta(tv[i], tv[i-1]));
2556 }
2557 err = 0;
2558 fepriv->state = FESTATE_DISEQC;
2559 fepriv->status = 0;
2560 }
2561 break;
2562
2563 /* DEPRECATED statistics ioctls */
2564
2565 case FE_READ_BER:
2566 if (fe->ops.read_ber) {
2567 if (fepriv->thread)
2568 err = fe->ops.read_ber(fe, parg);
2569 else
2570 err = -EAGAIN;
2571 }
2572 break;
2573
2574 case FE_READ_SIGNAL_STRENGTH:
2575 if (fe->ops.read_signal_strength) {
2576 if (fepriv->thread)
2577 err = fe->ops.read_signal_strength(fe, parg);
2578 else
2579 err = -EAGAIN;
2580 }
2581 break;
2582
2583 case FE_READ_SNR:
2584 if (fe->ops.read_snr) {
2585 if (fepriv->thread)
2586 err = fe->ops.read_snr(fe, parg);
2587 else
2588 err = -EAGAIN;
2589 }
2590 break;
2591
2592 case FE_READ_UNCORRECTED_BLOCKS:
2593 if (fe->ops.read_ucblocks) {
2594 if (fepriv->thread)
2595 err = fe->ops.read_ucblocks(fe, parg);
2596 else
2597 err = -EAGAIN;
2598 }
2599 break;
2600
2601 /* DEPRECATED DVBv3 ioctls */
2602
2603 case FE_SET_FRONTEND:
2604 err = dvbv3_set_delivery_system(fe);
2605 if (err)
2606 break;
2607
2608 err = dtv_property_cache_sync(fe, c, parg);
2609 if (err)
2610 break;
2611 err = dtv_set_frontend(fe);
2612 break;
2613 case FE_GET_EVENT:
2614 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2615 break;
2616
2617 case FE_GET_FRONTEND: {
2618 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2619
2620 /*
2621 * Let's use our own copy of property cache, in order to
2622 * avoid mangling with DTV zigzag logic, as drivers might
2623 * return crap, if they don't check if the data is available
2624 * before updating the properties cache.
2625 */
2626 err = dtv_get_frontend(fe, &getp, parg);
2627 break;
2628 }
2629
2630 default:
2631 return -ENOTSUPP;
2632 } /* switch */
2633
2634 return err;
2635 }
2636
2637
2638 static __poll_t dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2639 {
2640 struct dvb_device *dvbdev = file->private_data;
2641 struct dvb_frontend *fe = dvbdev->priv;
2642 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2643
2644 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2645
2646 poll_wait (file, &fepriv->events.wait_queue, wait);
2647
2648 if (fepriv->events.eventw != fepriv->events.eventr)
2649 return (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
2650
2651 return 0;
2652 }
2653
2654 static int dvb_frontend_open(struct inode *inode, struct file *file)
2655 {
2656 struct dvb_device *dvbdev = file->private_data;
2657 struct dvb_frontend *fe = dvbdev->priv;
2658 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2659 struct dvb_adapter *adapter = fe->dvb;
2660 int ret;
2661
2662 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2663 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2664 return -ENODEV;
2665
2666 if (adapter->mfe_shared) {
2667 mutex_lock (&adapter->mfe_lock);
2668
2669 if (adapter->mfe_dvbdev == NULL)
2670 adapter->mfe_dvbdev = dvbdev;
2671
2672 else if (adapter->mfe_dvbdev != dvbdev) {
2673 struct dvb_device
2674 *mfedev = adapter->mfe_dvbdev;
2675 struct dvb_frontend
2676 *mfe = mfedev->priv;
2677 struct dvb_frontend_private
2678 *mfepriv = mfe->frontend_priv;
2679 int mferetry = (dvb_mfe_wait_time << 1);
2680
2681 mutex_unlock (&adapter->mfe_lock);
2682 while (mferetry-- && (mfedev->users != -1 ||
2683 mfepriv->thread != NULL)) {
2684 if(msleep_interruptible(500)) {
2685 if(signal_pending(current))
2686 return -EINTR;
2687 }
2688 }
2689
2690 mutex_lock (&adapter->mfe_lock);
2691 if(adapter->mfe_dvbdev != dvbdev) {
2692 mfedev = adapter->mfe_dvbdev;
2693 mfe = mfedev->priv;
2694 mfepriv = mfe->frontend_priv;
2695 if (mfedev->users != -1 ||
2696 mfepriv->thread != NULL) {
2697 mutex_unlock (&adapter->mfe_lock);
2698 return -EBUSY;
2699 }
2700 adapter->mfe_dvbdev = dvbdev;
2701 }
2702 }
2703 }
2704
2705 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2706 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2707 goto err0;
2708
2709 /* If we took control of the bus, we need to force
2710 reinitialization. This is because many ts_bus_ctrl()
2711 functions strobe the RESET pin on the demod, and if the
2712 frontend thread already exists then the dvb_init() routine
2713 won't get called (which is what usually does initial
2714 register configuration). */
2715 fepriv->reinitialise = 1;
2716 }
2717
2718 if ((ret = dvb_generic_open (inode, file)) < 0)
2719 goto err1;
2720
2721 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2722 /* normal tune mode when opened R/W */
2723 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2724 fepriv->tone = -1;
2725 fepriv->voltage = -1;
2726
2727 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2728 if (fe->dvb->mdev) {
2729 mutex_lock(&fe->dvb->mdev->graph_mutex);
2730 if (fe->dvb->mdev->enable_source)
2731 ret = fe->dvb->mdev->enable_source(
2732 dvbdev->entity,
2733 &fepriv->pipe);
2734 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2735 if (ret) {
2736 dev_err(fe->dvb->device,
2737 "Tuner is busy. Error %d\n", ret);
2738 goto err2;
2739 }
2740 }
2741 #endif
2742 ret = dvb_frontend_start (fe);
2743 if (ret)
2744 goto err3;
2745
2746 /* empty event queue */
2747 fepriv->events.eventr = fepriv->events.eventw = 0;
2748 }
2749
2750 dvb_frontend_get(fe);
2751
2752 if (adapter->mfe_shared)
2753 mutex_unlock (&adapter->mfe_lock);
2754 return ret;
2755
2756 err3:
2757 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2758 if (fe->dvb->mdev) {
2759 mutex_lock(&fe->dvb->mdev->graph_mutex);
2760 if (fe->dvb->mdev->disable_source)
2761 fe->dvb->mdev->disable_source(dvbdev->entity);
2762 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2763 }
2764 err2:
2765 #endif
2766 dvb_generic_release(inode, file);
2767 err1:
2768 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2769 fe->ops.ts_bus_ctrl(fe, 0);
2770 err0:
2771 if (adapter->mfe_shared)
2772 mutex_unlock (&adapter->mfe_lock);
2773 return ret;
2774 }
2775
2776 static int dvb_frontend_release(struct inode *inode, struct file *file)
2777 {
2778 struct dvb_device *dvbdev = file->private_data;
2779 struct dvb_frontend *fe = dvbdev->priv;
2780 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2781 int ret;
2782
2783 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2784
2785 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2786 fepriv->release_jiffies = jiffies;
2787 mb();
2788 }
2789
2790 ret = dvb_generic_release (inode, file);
2791
2792 if (dvbdev->users == -1) {
2793 wake_up(&fepriv->wait_queue);
2794 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2795 if (fe->dvb->mdev) {
2796 mutex_lock(&fe->dvb->mdev->graph_mutex);
2797 if (fe->dvb->mdev->disable_source)
2798 fe->dvb->mdev->disable_source(dvbdev->entity);
2799 mutex_unlock(&fe->dvb->mdev->graph_mutex);
2800 }
2801 #endif
2802 if (fe->exit != DVB_FE_NO_EXIT)
2803 wake_up(&dvbdev->wait_queue);
2804 if (fe->ops.ts_bus_ctrl)
2805 fe->ops.ts_bus_ctrl(fe, 0);
2806 }
2807
2808 dvb_frontend_put(fe);
2809
2810 return ret;
2811 }
2812
2813 static const struct file_operations dvb_frontend_fops = {
2814 .owner = THIS_MODULE,
2815 .unlocked_ioctl = dvb_frontend_ioctl,
2816 #ifdef CONFIG_COMPAT
2817 .compat_ioctl = dvb_frontend_compat_ioctl,
2818 #endif
2819 .poll = dvb_frontend_poll,
2820 .open = dvb_frontend_open,
2821 .release = dvb_frontend_release,
2822 .llseek = noop_llseek,
2823 };
2824
2825 int dvb_frontend_suspend(struct dvb_frontend *fe)
2826 {
2827 int ret = 0;
2828
2829 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2830 fe->id);
2831
2832 if (fe->ops.tuner_ops.suspend)
2833 ret = fe->ops.tuner_ops.suspend(fe);
2834 else if (fe->ops.tuner_ops.sleep)
2835 ret = fe->ops.tuner_ops.sleep(fe);
2836
2837 if (fe->ops.sleep)
2838 ret = fe->ops.sleep(fe);
2839
2840 return ret;
2841 }
2842 EXPORT_SYMBOL(dvb_frontend_suspend);
2843
2844 int dvb_frontend_resume(struct dvb_frontend *fe)
2845 {
2846 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2847 int ret = 0;
2848
2849 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2850 fe->id);
2851
2852 fe->exit = DVB_FE_DEVICE_RESUME;
2853 if (fe->ops.init)
2854 ret = fe->ops.init(fe);
2855
2856 if (fe->ops.tuner_ops.resume)
2857 ret = fe->ops.tuner_ops.resume(fe);
2858 else if (fe->ops.tuner_ops.init)
2859 ret = fe->ops.tuner_ops.init(fe);
2860
2861 if (fe->ops.set_tone && fepriv->tone != -1)
2862 fe->ops.set_tone(fe, fepriv->tone);
2863 if (fe->ops.set_voltage && fepriv->voltage != -1)
2864 fe->ops.set_voltage(fe, fepriv->voltage);
2865
2866 fe->exit = DVB_FE_NO_EXIT;
2867 fepriv->state = FESTATE_RETUNE;
2868 dvb_frontend_wakeup(fe);
2869
2870 return ret;
2871 }
2872 EXPORT_SYMBOL(dvb_frontend_resume);
2873
2874 int dvb_register_frontend(struct dvb_adapter* dvb,
2875 struct dvb_frontend* fe)
2876 {
2877 struct dvb_frontend_private *fepriv;
2878 const struct dvb_device dvbdev_template = {
2879 .users = ~0,
2880 .writers = 1,
2881 .readers = (~0)-1,
2882 .fops = &dvb_frontend_fops,
2883 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2884 .name = fe->ops.info.name,
2885 #endif
2886 };
2887
2888 dev_dbg(dvb->device, "%s:\n", __func__);
2889
2890 if (mutex_lock_interruptible(&frontend_mutex))
2891 return -ERESTARTSYS;
2892
2893 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2894 if (fe->frontend_priv == NULL) {
2895 mutex_unlock(&frontend_mutex);
2896 return -ENOMEM;
2897 }
2898 fepriv = fe->frontend_priv;
2899
2900 kref_init(&fe->refcount);
2901
2902 /*
2903 * After initialization, there need to be two references: one
2904 * for dvb_unregister_frontend(), and another one for
2905 * dvb_frontend_detach().
2906 */
2907 dvb_frontend_get(fe);
2908
2909 sema_init(&fepriv->sem, 1);
2910 init_waitqueue_head (&fepriv->wait_queue);
2911 init_waitqueue_head (&fepriv->events.wait_queue);
2912 mutex_init(&fepriv->events.mtx);
2913 fe->dvb = dvb;
2914 fepriv->inversion = INVERSION_OFF;
2915
2916 dev_info(fe->dvb->device,
2917 "DVB: registering adapter %i frontend %i (%s)...\n",
2918 fe->dvb->num, fe->id, fe->ops.info.name);
2919
2920 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2921 fe, DVB_DEVICE_FRONTEND, 0);
2922
2923 /*
2924 * Initialize the cache to the proper values according with the
2925 * first supported delivery system (ops->delsys[0])
2926 */
2927
2928 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2929 dvb_frontend_clear_cache(fe);
2930
2931 mutex_unlock(&frontend_mutex);
2932 return 0;
2933 }
2934 EXPORT_SYMBOL(dvb_register_frontend);
2935
2936 int dvb_unregister_frontend(struct dvb_frontend* fe)
2937 {
2938 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2939 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2940
2941 mutex_lock(&frontend_mutex);
2942 dvb_frontend_stop(fe);
2943 dvb_remove_device(fepriv->dvbdev);
2944
2945 /* fe is invalid now */
2946 mutex_unlock(&frontend_mutex);
2947 dvb_frontend_put(fe);
2948 return 0;
2949 }
2950 EXPORT_SYMBOL(dvb_unregister_frontend);
2951
2952 static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
2953 void (*release)(struct dvb_frontend *fe))
2954 {
2955 if (release) {
2956 release(fe);
2957 #ifdef CONFIG_MEDIA_ATTACH
2958 dvb_detach(release);
2959 #endif
2960 }
2961 }
2962
2963 void dvb_frontend_detach(struct dvb_frontend* fe)
2964 {
2965 dvb_frontend_invoke_release(fe, fe->ops.release_sec);
2966 dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
2967 dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
2968 dvb_frontend_invoke_release(fe, fe->ops.detach);
2969 dvb_frontend_put(fe);
2970 }
2971 EXPORT_SYMBOL(dvb_frontend_detach);
Linux with added FPC-III support