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[media] dvb_frontend: tuner_ops.release returns void
[linux-2.6/btrfs-unstable.git] / drivers / media / dvb-core / dvb_frontend.c
blob023a7e4e616820f517c18de35cc7d98860b1b8e5
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 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
26 */
27
28 /* Enables DVBv3 compatibility bits at the headers */
29 #define __DVB_CORE__
30
31 #define pr_fmt(fmt) "dvb_frontend: " fmt
32
33 #include <linux/string.h>
34 #include <linux/kernel.h>
35 #include <linux/sched.h>
36 #include <linux/wait.h>
37 #include <linux/slab.h>
38 #include <linux/poll.h>
39 #include <linux/semaphore.h>
40 #include <linux/module.h>
41 #include <linux/list.h>
42 #include <linux/freezer.h>
43 #include <linux/jiffies.h>
44 #include <linux/kthread.h>
45 #include <linux/ktime.h>
46 #include <asm/processor.h>
47
48 #include "dvb_frontend.h"
49 #include "dvbdev.h"
50 #include <linux/dvb/version.h>
51
52 static int dvb_frontend_debug;
53 static int dvb_shutdown_timeout;
54 static int dvb_force_auto_inversion;
55 static int dvb_override_tune_delay;
56 static int dvb_powerdown_on_sleep = 1;
57 static int dvb_mfe_wait_time = 5;
58
59 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
60 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
61 module_param(dvb_shutdown_timeout, int, 0644);
62 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
63 module_param(dvb_force_auto_inversion, int, 0644);
64 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
65 module_param(dvb_override_tune_delay, int, 0644);
66 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
67 module_param(dvb_powerdown_on_sleep, int, 0644);
68 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
69 module_param(dvb_mfe_wait_time, int, 0644);
70 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)");
71
72 #define dprintk(fmt, arg...) \
73 printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
74
75 #define FESTATE_IDLE 1
76 #define FESTATE_RETUNE 2
77 #define FESTATE_TUNING_FAST 4
78 #define FESTATE_TUNING_SLOW 8
79 #define FESTATE_TUNED 16
80 #define FESTATE_ZIGZAG_FAST 32
81 #define FESTATE_ZIGZAG_SLOW 64
82 #define FESTATE_DISEQC 128
83 #define FESTATE_ERROR 256
84 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
85 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
86 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
87 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
88
89 /*
90 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
91 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
92 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
93 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
94 * FESTATE_TUNED. The frontend has successfully locked on.
95 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
96 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
97 * FESTATE_DISEQC. A DISEQC command has just been issued.
98 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
99 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
100 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
101 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
102 */
103
104 static DEFINE_MUTEX(frontend_mutex);
105
106 struct dvb_frontend_private {
107 struct kref refcount;
108
109 /* thread/frontend values */
110 struct dvb_device *dvbdev;
111 struct dvb_frontend_parameters parameters_out;
112 struct dvb_fe_events events;
113 struct semaphore sem;
114 struct list_head list_head;
115 wait_queue_head_t wait_queue;
116 struct task_struct *thread;
117 unsigned long release_jiffies;
118 unsigned int wakeup;
119 enum fe_status status;
120 unsigned long tune_mode_flags;
121 unsigned int delay;
122 unsigned int reinitialise;
123 int tone;
124 int voltage;
125
126 /* swzigzag values */
127 unsigned int state;
128 unsigned int bending;
129 int lnb_drift;
130 unsigned int inversion;
131 unsigned int auto_step;
132 unsigned int auto_sub_step;
133 unsigned int started_auto_step;
134 unsigned int min_delay;
135 unsigned int max_drift;
136 unsigned int step_size;
137 int quality;
138 unsigned int check_wrapped;
139 enum dvbfe_search algo_status;
140
141 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
142 struct media_pipeline pipe;
143 #endif
144 };
145
146 static void dvb_frontend_private_free(struct kref *ref)
147 {
148 struct dvb_frontend_private *fepriv =
149 container_of(ref, struct dvb_frontend_private, refcount);
150 kfree(fepriv);
151 }
152
153 static void dvb_frontend_private_put(struct dvb_frontend_private *fepriv)
154 {
155 kref_put(&fepriv->refcount, dvb_frontend_private_free);
156 }
157
158 static void dvb_frontend_private_get(struct dvb_frontend_private *fepriv)
159 {
160 kref_get(&fepriv->refcount);
161 }
162
163 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
164 static int dtv_get_frontend(struct dvb_frontend *fe,
165 struct dtv_frontend_properties *c,
166 struct dvb_frontend_parameters *p_out);
167 static int
168 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
169 const struct dtv_frontend_properties *c,
170 struct dvb_frontend_parameters *p);
171
172 static bool has_get_frontend(struct dvb_frontend *fe)
173 {
174 return fe->ops.get_frontend != NULL;
175 }
176
177 void
178 dvb_tuner_simple_release(struct dvb_frontend *fe)
179 {
180 kfree(fe->tuner_priv);
181 fe->tuner_priv = NULL;
182 }
183 EXPORT_SYMBOL(dvb_tuner_simple_release);
184
185 /*
186 * Due to DVBv3 API calls, a delivery system should be mapped into one of
187 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
188 * otherwise, a DVBv3 call will fail.
189 */
190 enum dvbv3_emulation_type {
191 DVBV3_UNKNOWN,
192 DVBV3_QPSK,
193 DVBV3_QAM,
194 DVBV3_OFDM,
195 DVBV3_ATSC,
196 };
197
198 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
199 {
200 switch (delivery_system) {
201 case SYS_DVBC_ANNEX_A:
202 case SYS_DVBC_ANNEX_C:
203 return DVBV3_QAM;
204 case SYS_DVBS:
205 case SYS_DVBS2:
206 case SYS_TURBO:
207 case SYS_ISDBS:
208 case SYS_DSS:
209 return DVBV3_QPSK;
210 case SYS_DVBT:
211 case SYS_DVBT2:
212 case SYS_ISDBT:
213 case SYS_DTMB:
214 return DVBV3_OFDM;
215 case SYS_ATSC:
216 case SYS_ATSCMH:
217 case SYS_DVBC_ANNEX_B:
218 return DVBV3_ATSC;
219 case SYS_UNDEFINED:
220 case SYS_ISDBC:
221 case SYS_DVBH:
222 case SYS_DAB:
223 default:
224 /*
225 * Doesn't know how to emulate those types and/or
226 * there's no frontend driver from this type yet
227 * with some emulation code, so, we're not sure yet how
228 * to handle them, or they're not compatible with a DVBv3 call.
229 */
230 return DVBV3_UNKNOWN;
231 }
232 }
233
234 static void dvb_frontend_add_event(struct dvb_frontend *fe,
235 enum fe_status status)
236 {
237 struct dvb_frontend_private *fepriv = fe->frontend_priv;
238 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
239 struct dvb_fe_events *events = &fepriv->events;
240 struct dvb_frontend_event *e;
241 int wp;
242
243 dev_dbg(fe->dvb->device, "%s:\n", __func__);
244
245 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
246 dtv_get_frontend(fe, c, &fepriv->parameters_out);
247
248 mutex_lock(&events->mtx);
249
250 wp = (events->eventw + 1) % MAX_EVENT;
251 if (wp == events->eventr) {
252 events->overflow = 1;
253 events->eventr = (events->eventr + 1) % MAX_EVENT;
254 }
255
256 e = &events->events[events->eventw];
257 e->status = status;
258 e->parameters = fepriv->parameters_out;
259
260 events->eventw = wp;
261
262 mutex_unlock(&events->mtx);
263
264 wake_up_interruptible (&events->wait_queue);
265 }
266
267 static int dvb_frontend_get_event(struct dvb_frontend *fe,
268 struct dvb_frontend_event *event, int flags)
269 {
270 struct dvb_frontend_private *fepriv = fe->frontend_priv;
271 struct dvb_fe_events *events = &fepriv->events;
272
273 dev_dbg(fe->dvb->device, "%s:\n", __func__);
274
275 if (events->overflow) {
276 events->overflow = 0;
277 return -EOVERFLOW;
278 }
279
280 if (events->eventw == events->eventr) {
281 int ret;
282
283 if (flags & O_NONBLOCK)
284 return -EWOULDBLOCK;
285
286 up(&fepriv->sem);
287
288 ret = wait_event_interruptible (events->wait_queue,
289 events->eventw != events->eventr);
290
291 if (down_interruptible (&fepriv->sem))
292 return -ERESTARTSYS;
293
294 if (ret < 0)
295 return ret;
296 }
297
298 mutex_lock(&events->mtx);
299 *event = events->events[events->eventr];
300 events->eventr = (events->eventr + 1) % MAX_EVENT;
301 mutex_unlock(&events->mtx);
302
303 return 0;
304 }
305
306 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
307 {
308 struct dvb_frontend_private *fepriv = fe->frontend_priv;
309 struct dvb_fe_events *events = &fepriv->events;
310
311 mutex_lock(&events->mtx);
312 events->eventr = events->eventw;
313 mutex_unlock(&events->mtx);
314 }
315
316 static void dvb_frontend_init(struct dvb_frontend *fe)
317 {
318 dev_dbg(fe->dvb->device,
319 "%s: initialising adapter %i frontend %i (%s)...\n",
320 __func__, fe->dvb->num, fe->id, fe->ops.info.name);
321
322 if (fe->ops.init)
323 fe->ops.init(fe);
324 if (fe->ops.tuner_ops.init) {
325 if (fe->ops.i2c_gate_ctrl)
326 fe->ops.i2c_gate_ctrl(fe, 1);
327 fe->ops.tuner_ops.init(fe);
328 if (fe->ops.i2c_gate_ctrl)
329 fe->ops.i2c_gate_ctrl(fe, 0);
330 }
331 }
332
333 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
334 {
335 struct dvb_frontend_private *fepriv = fe->frontend_priv;
336
337 fepriv->reinitialise = 1;
338 dvb_frontend_wakeup(fe);
339 }
340 EXPORT_SYMBOL(dvb_frontend_reinitialise);
341
342 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
343 {
344 int q2;
345 struct dvb_frontend *fe = fepriv->dvbdev->priv;
346
347 dev_dbg(fe->dvb->device, "%s:\n", __func__);
348
349 if (locked)
350 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
351 else
352 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
353
354 q2 = fepriv->quality - 128;
355 q2 *= q2;
356
357 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
358 }
359
360 /**
361 * Performs automatic twiddling of frontend parameters.
362 *
363 * @param fe The frontend concerned.
364 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
365 * @returns Number of complete iterations that have been performed.
366 */
367 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
368 {
369 int autoinversion;
370 int ready = 0;
371 int fe_set_err = 0;
372 struct dvb_frontend_private *fepriv = fe->frontend_priv;
373 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
374 int original_inversion = c->inversion;
375 u32 original_frequency = c->frequency;
376
377 /* are we using autoinversion? */
378 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
379 (c->inversion == INVERSION_AUTO));
380
381 /* setup parameters correctly */
382 while(!ready) {
383 /* calculate the lnb_drift */
384 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
385
386 /* wrap the auto_step if we've exceeded the maximum drift */
387 if (fepriv->lnb_drift > fepriv->max_drift) {
388 fepriv->auto_step = 0;
389 fepriv->auto_sub_step = 0;
390 fepriv->lnb_drift = 0;
391 }
392
393 /* perform inversion and +/- zigzag */
394 switch(fepriv->auto_sub_step) {
395 case 0:
396 /* try with the current inversion and current drift setting */
397 ready = 1;
398 break;
399
400 case 1:
401 if (!autoinversion) break;
402
403 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
404 ready = 1;
405 break;
406
407 case 2:
408 if (fepriv->lnb_drift == 0) break;
409
410 fepriv->lnb_drift = -fepriv->lnb_drift;
411 ready = 1;
412 break;
413
414 case 3:
415 if (fepriv->lnb_drift == 0) break;
416 if (!autoinversion) break;
417
418 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
419 fepriv->lnb_drift = -fepriv->lnb_drift;
420 ready = 1;
421 break;
422
423 default:
424 fepriv->auto_step++;
425 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
426 break;
427 }
428
429 if (!ready) fepriv->auto_sub_step++;
430 }
431
432 /* if this attempt would hit where we started, indicate a complete
433 * iteration has occurred */
434 if ((fepriv->auto_step == fepriv->started_auto_step) &&
435 (fepriv->auto_sub_step == 0) && check_wrapped) {
436 return 1;
437 }
438
439 dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \
440 "auto_sub_step:%i started_auto_step:%i\n",
441 __func__, fepriv->lnb_drift, fepriv->inversion,
442 fepriv->auto_step, fepriv->auto_sub_step,
443 fepriv->started_auto_step);
444
445 /* set the frontend itself */
446 c->frequency += fepriv->lnb_drift;
447 if (autoinversion)
448 c->inversion = fepriv->inversion;
449 tmp = *c;
450 if (fe->ops.set_frontend)
451 fe_set_err = fe->ops.set_frontend(fe);
452 *c = tmp;
453 if (fe_set_err < 0) {
454 fepriv->state = FESTATE_ERROR;
455 return fe_set_err;
456 }
457
458 c->frequency = original_frequency;
459 c->inversion = original_inversion;
460
461 fepriv->auto_sub_step++;
462 return 0;
463 }
464
465 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
466 {
467 enum fe_status s = 0;
468 int retval = 0;
469 struct dvb_frontend_private *fepriv = fe->frontend_priv;
470 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
471
472 /* if we've got no parameters, just keep idling */
473 if (fepriv->state & FESTATE_IDLE) {
474 fepriv->delay = 3*HZ;
475 fepriv->quality = 0;
476 return;
477 }
478
479 /* in SCAN mode, we just set the frontend when asked and leave it alone */
480 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
481 if (fepriv->state & FESTATE_RETUNE) {
482 tmp = *c;
483 if (fe->ops.set_frontend)
484 retval = fe->ops.set_frontend(fe);
485 *c = tmp;
486 if (retval < 0)
487 fepriv->state = FESTATE_ERROR;
488 else
489 fepriv->state = FESTATE_TUNED;
490 }
491 fepriv->delay = 3*HZ;
492 fepriv->quality = 0;
493 return;
494 }
495
496 /* get the frontend status */
497 if (fepriv->state & FESTATE_RETUNE) {
498 s = 0;
499 } else {
500 if (fe->ops.read_status)
501 fe->ops.read_status(fe, &s);
502 if (s != fepriv->status) {
503 dvb_frontend_add_event(fe, s);
504 fepriv->status = s;
505 }
506 }
507
508 /* if we're not tuned, and we have a lock, move to the TUNED state */
509 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
510 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
511 fepriv->state = FESTATE_TUNED;
512
513 /* if we're tuned, then we have determined the correct inversion */
514 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
515 (c->inversion == INVERSION_AUTO)) {
516 c->inversion = fepriv->inversion;
517 }
518 return;
519 }
520
521 /* if we are tuned already, check we're still locked */
522 if (fepriv->state & FESTATE_TUNED) {
523 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
524
525 /* we're tuned, and the lock is still good... */
526 if (s & FE_HAS_LOCK) {
527 return;
528 } else { /* if we _WERE_ tuned, but now don't have a lock */
529 fepriv->state = FESTATE_ZIGZAG_FAST;
530 fepriv->started_auto_step = fepriv->auto_step;
531 fepriv->check_wrapped = 0;
532 }
533 }
534
535 /* don't actually do anything if we're in the LOSTLOCK state,
536 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
537 if ((fepriv->state & FESTATE_LOSTLOCK) &&
538 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
539 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
540 return;
541 }
542
543 /* don't do anything if we're in the DISEQC state, since this
544 * might be someone with a motorized dish controlled by DISEQC.
545 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
546 if (fepriv->state & FESTATE_DISEQC) {
547 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
548 return;
549 }
550
551 /* if we're in the RETUNE state, set everything up for a brand
552 * new scan, keeping the current inversion setting, as the next
553 * tune is _very_ likely to require the same */
554 if (fepriv->state & FESTATE_RETUNE) {
555 fepriv->lnb_drift = 0;
556 fepriv->auto_step = 0;
557 fepriv->auto_sub_step = 0;
558 fepriv->started_auto_step = 0;
559 fepriv->check_wrapped = 0;
560 }
561
562 /* fast zigzag. */
563 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
564 fepriv->delay = fepriv->min_delay;
565
566 /* perform a tune */
567 retval = dvb_frontend_swzigzag_autotune(fe,
568 fepriv->check_wrapped);
569 if (retval < 0) {
570 return;
571 } else if (retval) {
572 /* OK, if we've run out of trials at the fast speed.
573 * Drop back to slow for the _next_ attempt */
574 fepriv->state = FESTATE_SEARCHING_SLOW;
575 fepriv->started_auto_step = fepriv->auto_step;
576 return;
577 }
578 fepriv->check_wrapped = 1;
579
580 /* if we've just retuned, enter the ZIGZAG_FAST state.
581 * This ensures we cannot return from an
582 * FE_SET_FRONTEND ioctl before the first frontend tune
583 * occurs */
584 if (fepriv->state & FESTATE_RETUNE) {
585 fepriv->state = FESTATE_TUNING_FAST;
586 }
587 }
588
589 /* slow zigzag */
590 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
591 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
592
593 /* Note: don't bother checking for wrapping; we stay in this
594 * state until we get a lock */
595 dvb_frontend_swzigzag_autotune(fe, 0);
596 }
597 }
598
599 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
600 {
601 struct dvb_frontend_private *fepriv = fe->frontend_priv;
602
603 if (fe->exit != DVB_FE_NO_EXIT)
604 return 1;
605
606 if (fepriv->dvbdev->writers == 1)
607 if (time_after_eq(jiffies, fepriv->release_jiffies +
608 dvb_shutdown_timeout * HZ))
609 return 1;
610
611 return 0;
612 }
613
614 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
615 {
616 struct dvb_frontend_private *fepriv = fe->frontend_priv;
617
618 if (fepriv->wakeup) {
619 fepriv->wakeup = 0;
620 return 1;
621 }
622 return dvb_frontend_is_exiting(fe);
623 }
624
625 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
626 {
627 struct dvb_frontend_private *fepriv = fe->frontend_priv;
628
629 fepriv->wakeup = 1;
630 wake_up_interruptible(&fepriv->wait_queue);
631 }
632
633 static int dvb_frontend_thread(void *data)
634 {
635 struct dvb_frontend *fe = data;
636 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
637 struct dvb_frontend_private *fepriv = fe->frontend_priv;
638 enum fe_status s;
639 enum dvbfe_algo algo;
640 bool re_tune = false;
641 bool semheld = false;
642
643 dev_dbg(fe->dvb->device, "%s:\n", __func__);
644
645 fepriv->check_wrapped = 0;
646 fepriv->quality = 0;
647 fepriv->delay = 3*HZ;
648 fepriv->status = 0;
649 fepriv->wakeup = 0;
650 fepriv->reinitialise = 0;
651
652 dvb_frontend_init(fe);
653
654 set_freezable();
655 while (1) {
656 up(&fepriv->sem); /* is locked when we enter the thread... */
657 restart:
658 wait_event_interruptible_timeout(fepriv->wait_queue,
659 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
660 || freezing(current),
661 fepriv->delay);
662
663 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
664 /* got signal or quitting */
665 if (!down_interruptible(&fepriv->sem))
666 semheld = true;
667 fe->exit = DVB_FE_NORMAL_EXIT;
668 break;
669 }
670
671 if (try_to_freeze())
672 goto restart;
673
674 if (down_interruptible(&fepriv->sem))
675 break;
676
677 if (fepriv->reinitialise) {
678 dvb_frontend_init(fe);
679 if (fe->ops.set_tone && fepriv->tone != -1)
680 fe->ops.set_tone(fe, fepriv->tone);
681 if (fe->ops.set_voltage && fepriv->voltage != -1)
682 fe->ops.set_voltage(fe, fepriv->voltage);
683 fepriv->reinitialise = 0;
684 }
685
686 /* do an iteration of the tuning loop */
687 if (fe->ops.get_frontend_algo) {
688 algo = fe->ops.get_frontend_algo(fe);
689 switch (algo) {
690 case DVBFE_ALGO_HW:
691 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
692
693 if (fepriv->state & FESTATE_RETUNE) {
694 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__);
695 re_tune = true;
696 fepriv->state = FESTATE_TUNED;
697 } else {
698 re_tune = false;
699 }
700
701 if (fe->ops.tune)
702 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
703
704 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
705 dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__);
706 dvb_frontend_add_event(fe, s);
707 fepriv->status = s;
708 }
709 break;
710 case DVBFE_ALGO_SW:
711 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
712 dvb_frontend_swzigzag(fe);
713 break;
714 case DVBFE_ALGO_CUSTOM:
715 dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
716 if (fepriv->state & FESTATE_RETUNE) {
717 dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__);
718 fepriv->state = FESTATE_TUNED;
719 }
720 /* Case where we are going to search for a carrier
721 * User asked us to retune again for some reason, possibly
722 * requesting a search with a new set of parameters
723 */
724 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
725 if (fe->ops.search) {
726 fepriv->algo_status = fe->ops.search(fe);
727 /* We did do a search as was requested, the flags are
728 * now unset as well and has the flags wrt to search.
729 */
730 } else {
731 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
732 }
733 }
734 /* Track the carrier if the search was successful */
735 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
736 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
737 fepriv->delay = HZ / 2;
738 }
739 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
740 fe->ops.read_status(fe, &s);
741 if (s != fepriv->status) {
742 dvb_frontend_add_event(fe, s); /* update event list */
743 fepriv->status = s;
744 if (!(s & FE_HAS_LOCK)) {
745 fepriv->delay = HZ / 10;
746 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
747 } else {
748 fepriv->delay = 60 * HZ;
749 }
750 }
751 break;
752 default:
753 dev_dbg(fe->dvb->device, "%s: UNDEFINED ALGO !\n", __func__);
754 break;
755 }
756 } else {
757 dvb_frontend_swzigzag(fe);
758 }
759 }
760
761 if (dvb_powerdown_on_sleep) {
762 if (fe->ops.set_voltage)
763 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
764 if (fe->ops.tuner_ops.sleep) {
765 if (fe->ops.i2c_gate_ctrl)
766 fe->ops.i2c_gate_ctrl(fe, 1);
767 fe->ops.tuner_ops.sleep(fe);
768 if (fe->ops.i2c_gate_ctrl)
769 fe->ops.i2c_gate_ctrl(fe, 0);
770 }
771 if (fe->ops.sleep)
772 fe->ops.sleep(fe);
773 }
774
775 fepriv->thread = NULL;
776 if (kthread_should_stop())
777 fe->exit = DVB_FE_DEVICE_REMOVED;
778 else
779 fe->exit = DVB_FE_NO_EXIT;
780 mb();
781
782 if (semheld)
783 up(&fepriv->sem);
784 dvb_frontend_wakeup(fe);
785 return 0;
786 }
787
788 static void dvb_frontend_stop(struct dvb_frontend *fe)
789 {
790 struct dvb_frontend_private *fepriv = fe->frontend_priv;
791
792 dev_dbg(fe->dvb->device, "%s:\n", __func__);
793
794 if (fe->exit != DVB_FE_DEVICE_REMOVED)
795 fe->exit = DVB_FE_NORMAL_EXIT;
796 mb();
797
798 if (!fepriv->thread)
799 return;
800
801 kthread_stop(fepriv->thread);
802
803 sema_init(&fepriv->sem, 1);
804 fepriv->state = FESTATE_IDLE;
805
806 /* paranoia check in case a signal arrived */
807 if (fepriv->thread)
808 dev_warn(fe->dvb->device,
809 "dvb_frontend_stop: warning: thread %p won't exit\n",
810 fepriv->thread);
811 }
812
813 /*
814 * Sleep for the amount of time given by add_usec parameter
815 *
816 * This needs to be as precise as possible, as it affects the detection of
817 * the dish tone command at the satellite subsystem. The precision is improved
818 * by using a scheduled msleep followed by udelay for the remainder.
819 */
820 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
821 {
822 s32 delta;
823
824 *waketime = ktime_add_us(*waketime, add_usec);
825 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
826 if (delta > 2500) {
827 msleep((delta - 1500) / 1000);
828 delta = ktime_us_delta(ktime_get_boottime(), *waketime);
829 }
830 if (delta > 0)
831 udelay(delta);
832 }
833 EXPORT_SYMBOL(dvb_frontend_sleep_until);
834
835 static int dvb_frontend_start(struct dvb_frontend *fe)
836 {
837 int ret;
838 struct dvb_frontend_private *fepriv = fe->frontend_priv;
839 struct task_struct *fe_thread;
840
841 dev_dbg(fe->dvb->device, "%s:\n", __func__);
842
843 if (fepriv->thread) {
844 if (fe->exit == DVB_FE_NO_EXIT)
845 return 0;
846 else
847 dvb_frontend_stop (fe);
848 }
849
850 if (signal_pending(current))
851 return -EINTR;
852 if (down_interruptible (&fepriv->sem))
853 return -EINTR;
854
855 fepriv->state = FESTATE_IDLE;
856 fe->exit = DVB_FE_NO_EXIT;
857 fepriv->thread = NULL;
858 mb();
859
860 fe_thread = kthread_run(dvb_frontend_thread, fe,
861 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
862 if (IS_ERR(fe_thread)) {
863 ret = PTR_ERR(fe_thread);
864 dev_warn(fe->dvb->device,
865 "dvb_frontend_start: failed to start kthread (%d)\n",
866 ret);
867 up(&fepriv->sem);
868 return ret;
869 }
870 fepriv->thread = fe_thread;
871 return 0;
872 }
873
874 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
875 u32 *freq_min, u32 *freq_max)
876 {
877 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
878
879 if (fe->ops.info.frequency_max == 0)
880 *freq_max = fe->ops.tuner_ops.info.frequency_max;
881 else if (fe->ops.tuner_ops.info.frequency_max == 0)
882 *freq_max = fe->ops.info.frequency_max;
883 else
884 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
885
886 if (*freq_min == 0 || *freq_max == 0)
887 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
888 fe->dvb->num, fe->id);
889 }
890
891 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
892 {
893 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
894 u32 freq_min;
895 u32 freq_max;
896
897 /* range check: frequency */
898 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
899 if ((freq_min && c->frequency < freq_min) ||
900 (freq_max && c->frequency > freq_max)) {
901 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
902 fe->dvb->num, fe->id, c->frequency,
903 freq_min, freq_max);
904 return -EINVAL;
905 }
906
907 /* range check: symbol rate */
908 switch (c->delivery_system) {
909 case SYS_DVBS:
910 case SYS_DVBS2:
911 case SYS_TURBO:
912 case SYS_DVBC_ANNEX_A:
913 case SYS_DVBC_ANNEX_C:
914 if ((fe->ops.info.symbol_rate_min &&
915 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
916 (fe->ops.info.symbol_rate_max &&
917 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
918 dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
919 fe->dvb->num, fe->id, c->symbol_rate,
920 fe->ops.info.symbol_rate_min,
921 fe->ops.info.symbol_rate_max);
922 return -EINVAL;
923 }
924 default:
925 break;
926 }
927
928 return 0;
929 }
930
931 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
932 {
933 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
934 int i;
935 u32 delsys;
936
937 delsys = c->delivery_system;
938 memset(c, 0, offsetof(struct dtv_frontend_properties, strength));
939 c->delivery_system = delsys;
940
941 c->state = DTV_CLEAR;
942
943 dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n",
944 __func__, c->delivery_system);
945
946 c->transmission_mode = TRANSMISSION_MODE_AUTO;
947 c->bandwidth_hz = 0; /* AUTO */
948 c->guard_interval = GUARD_INTERVAL_AUTO;
949 c->hierarchy = HIERARCHY_AUTO;
950 c->symbol_rate = 0;
951 c->code_rate_HP = FEC_AUTO;
952 c->code_rate_LP = FEC_AUTO;
953 c->fec_inner = FEC_AUTO;
954 c->rolloff = ROLLOFF_AUTO;
955 c->voltage = SEC_VOLTAGE_OFF;
956 c->sectone = SEC_TONE_OFF;
957 c->pilot = PILOT_AUTO;
958
959 c->isdbt_partial_reception = 0;
960 c->isdbt_sb_mode = 0;
961 c->isdbt_sb_subchannel = 0;
962 c->isdbt_sb_segment_idx = 0;
963 c->isdbt_sb_segment_count = 0;
964 c->isdbt_layer_enabled = 0;
965 for (i = 0; i < 3; i++) {
966 c->layer[i].fec = FEC_AUTO;
967 c->layer[i].modulation = QAM_AUTO;
968 c->layer[i].interleaving = 0;
969 c->layer[i].segment_count = 0;
970 }
971
972 c->stream_id = NO_STREAM_ID_FILTER;
973
974 switch (c->delivery_system) {
975 case SYS_DVBS:
976 case SYS_DVBS2:
977 case SYS_TURBO:
978 c->modulation = QPSK; /* implied for DVB-S in legacy API */
979 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
980 break;
981 case SYS_ATSC:
982 c->modulation = VSB_8;
983 break;
984 case SYS_ISDBS:
985 c->symbol_rate = 28860000;
986 c->rolloff = ROLLOFF_35;
987 c->bandwidth_hz = c->symbol_rate / 100 * 135;
988 break;
989 default:
990 c->modulation = QAM_AUTO;
991 break;
992 }
993
994 c->lna = LNA_AUTO;
995
996 return 0;
997 }
998
999 #define _DTV_CMD(n, s, b) \
1000 [n] = { \
1001 .name = #n, \
1002 .cmd = n, \
1003 .set = s,\
1004 .buffer = b \
1005 }
1006
1007 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
1008 _DTV_CMD(DTV_TUNE, 1, 0),
1009 _DTV_CMD(DTV_CLEAR, 1, 0),
1010
1011 /* Set */
1012 _DTV_CMD(DTV_FREQUENCY, 1, 0),
1013 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
1014 _DTV_CMD(DTV_MODULATION, 1, 0),
1015 _DTV_CMD(DTV_INVERSION, 1, 0),
1016 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
1017 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
1018 _DTV_CMD(DTV_INNER_FEC, 1, 0),
1019 _DTV_CMD(DTV_VOLTAGE, 1, 0),
1020 _DTV_CMD(DTV_TONE, 1, 0),
1021 _DTV_CMD(DTV_PILOT, 1, 0),
1022 _DTV_CMD(DTV_ROLLOFF, 1, 0),
1023 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
1024 _DTV_CMD(DTV_HIERARCHY, 1, 0),
1025 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
1026 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
1027 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
1028 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1029 _DTV_CMD(DTV_INTERLEAVING, 1, 0),
1030
1031 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1032 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1033 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1034 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1035 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1036 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1037 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1038 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1039 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1040 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1041 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1042 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1043 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1044 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1045 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1046 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1047 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1048 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1049
1050 _DTV_CMD(DTV_STREAM_ID, 1, 0),
1051 _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0),
1052 _DTV_CMD(DTV_LNA, 1, 0),
1053
1054 /* Get */
1055 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1056 _DTV_CMD(DTV_API_VERSION, 0, 0),
1057
1058 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1059
1060 _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0),
1061 _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0),
1062
1063 _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0),
1064 _DTV_CMD(DTV_ATSCMH_NOG, 0, 0),
1065 _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0),
1066 _DTV_CMD(DTV_ATSCMH_SGN, 0, 0),
1067 _DTV_CMD(DTV_ATSCMH_PRC, 0, 0),
1068 _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0),
1069 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0),
1070 _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0),
1071 _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0),
1072 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0),
1073 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0),
1074 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0),
1075 _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0),
1076
1077 /* Statistics API */
1078 _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0),
1079 _DTV_CMD(DTV_STAT_CNR, 0, 0),
1080 _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0),
1081 _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0),
1082 _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0),
1083 _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0),
1084 _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0),
1085 _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0),
1086 };
1087
1088 static void dtv_property_dump(struct dvb_frontend *fe,
1089 bool is_set,
1090 struct dtv_property *tvp)
1091 {
1092 int i;
1093
1094 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1095 dev_warn(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x undefined\n",
1096 __func__,
1097 is_set ? "SET" : "GET",
1098 tvp->cmd);
1099 return;
1100 }
1101
1102 dev_dbg(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x (%s)\n", __func__,
1103 is_set ? "SET" : "GET",
1104 tvp->cmd,
1105 dtv_cmds[tvp->cmd].name);
1106
1107 if (dtv_cmds[tvp->cmd].buffer) {
1108 dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n",
1109 __func__, tvp->u.buffer.len);
1110
1111 for(i = 0; i < tvp->u.buffer.len; i++)
1112 dev_dbg(fe->dvb->device,
1113 "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n",
1114 __func__, i, tvp->u.buffer.data[i]);
1115 } else {
1116 dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__,
1117 tvp->u.data);
1118 }
1119 }
1120
1121 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1122 * drivers can use a single set_frontend tuning function, regardless of whether
1123 * it's being used for the legacy or new API, reducing code and complexity.
1124 */
1125 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1126 struct dtv_frontend_properties *c,
1127 const struct dvb_frontend_parameters *p)
1128 {
1129 c->frequency = p->frequency;
1130 c->inversion = p->inversion;
1131
1132 switch (dvbv3_type(c->delivery_system)) {
1133 case DVBV3_QPSK:
1134 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1135 c->symbol_rate = p->u.qpsk.symbol_rate;
1136 c->fec_inner = p->u.qpsk.fec_inner;
1137 break;
1138 case DVBV3_QAM:
1139 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1140 c->symbol_rate = p->u.qam.symbol_rate;
1141 c->fec_inner = p->u.qam.fec_inner;
1142 c->modulation = p->u.qam.modulation;
1143 break;
1144 case DVBV3_OFDM:
1145 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1146
1147 switch (p->u.ofdm.bandwidth) {
1148 case BANDWIDTH_10_MHZ:
1149 c->bandwidth_hz = 10000000;
1150 break;
1151 case BANDWIDTH_8_MHZ:
1152 c->bandwidth_hz = 8000000;
1153 break;
1154 case BANDWIDTH_7_MHZ:
1155 c->bandwidth_hz = 7000000;
1156 break;
1157 case BANDWIDTH_6_MHZ:
1158 c->bandwidth_hz = 6000000;
1159 break;
1160 case BANDWIDTH_5_MHZ:
1161 c->bandwidth_hz = 5000000;
1162 break;
1163 case BANDWIDTH_1_712_MHZ:
1164 c->bandwidth_hz = 1712000;
1165 break;
1166 case BANDWIDTH_AUTO:
1167 c->bandwidth_hz = 0;
1168 }
1169
1170 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1171 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1172 c->modulation = p->u.ofdm.constellation;
1173 c->transmission_mode = p->u.ofdm.transmission_mode;
1174 c->guard_interval = p->u.ofdm.guard_interval;
1175 c->hierarchy = p->u.ofdm.hierarchy_information;
1176 break;
1177 case DVBV3_ATSC:
1178 dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__);
1179 c->modulation = p->u.vsb.modulation;
1180 if (c->delivery_system == SYS_ATSCMH)
1181 break;
1182 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1183 c->delivery_system = SYS_ATSC;
1184 else
1185 c->delivery_system = SYS_DVBC_ANNEX_B;
1186 break;
1187 case DVBV3_UNKNOWN:
1188 dev_err(fe->dvb->device,
1189 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1190 __func__, c->delivery_system);
1191 return -EINVAL;
1192 }
1193
1194 return 0;
1195 }
1196
1197 /* Ensure the cached values are set correctly in the frontend
1198 * legacy tuning structures, for the advanced tuning API.
1199 */
1200 static int
1201 dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1202 const struct dtv_frontend_properties *c,
1203 struct dvb_frontend_parameters *p)
1204 {
1205 p->frequency = c->frequency;
1206 p->inversion = c->inversion;
1207
1208 switch (dvbv3_type(c->delivery_system)) {
1209 case DVBV3_UNKNOWN:
1210 dev_err(fe->dvb->device,
1211 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1212 __func__, c->delivery_system);
1213 return -EINVAL;
1214 case DVBV3_QPSK:
1215 dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__);
1216 p->u.qpsk.symbol_rate = c->symbol_rate;
1217 p->u.qpsk.fec_inner = c->fec_inner;
1218 break;
1219 case DVBV3_QAM:
1220 dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__);
1221 p->u.qam.symbol_rate = c->symbol_rate;
1222 p->u.qam.fec_inner = c->fec_inner;
1223 p->u.qam.modulation = c->modulation;
1224 break;
1225 case DVBV3_OFDM:
1226 dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__);
1227 switch (c->bandwidth_hz) {
1228 case 10000000:
1229 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1230 break;
1231 case 8000000:
1232 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1233 break;
1234 case 7000000:
1235 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1236 break;
1237 case 6000000:
1238 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1239 break;
1240 case 5000000:
1241 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1242 break;
1243 case 1712000:
1244 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1245 break;
1246 case 0:
1247 default:
1248 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1249 }
1250 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1251 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1252 p->u.ofdm.constellation = c->modulation;
1253 p->u.ofdm.transmission_mode = c->transmission_mode;
1254 p->u.ofdm.guard_interval = c->guard_interval;
1255 p->u.ofdm.hierarchy_information = c->hierarchy;
1256 break;
1257 case DVBV3_ATSC:
1258 dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__);
1259 p->u.vsb.modulation = c->modulation;
1260 break;
1261 }
1262 return 0;
1263 }
1264
1265 /**
1266 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1267 * @fe: struct dvb_frontend pointer
1268 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1269 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1270 *
1271 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1272 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1273 * If p_out is not null, it will update the DVBv3 params pointed by it.
1274 */
1275 static int dtv_get_frontend(struct dvb_frontend *fe,
1276 struct dtv_frontend_properties *c,
1277 struct dvb_frontend_parameters *p_out)
1278 {
1279 int r;
1280
1281 if (fe->ops.get_frontend) {
1282 r = fe->ops.get_frontend(fe, c);
1283 if (unlikely(r < 0))
1284 return r;
1285 if (p_out)
1286 dtv_property_legacy_params_sync(fe, c, p_out);
1287 return 0;
1288 }
1289
1290 /* As everything is in cache, get_frontend fops are always supported */
1291 return 0;
1292 }
1293
1294 static int dvb_frontend_ioctl_legacy(struct file *file,
1295 unsigned int cmd, void *parg);
1296 static int dvb_frontend_ioctl_properties(struct file *file,
1297 unsigned int cmd, void *parg);
1298
1299 static int dtv_property_process_get(struct dvb_frontend *fe,
1300 const struct dtv_frontend_properties *c,
1301 struct dtv_property *tvp,
1302 struct file *file)
1303 {
1304 int r, ncaps;
1305
1306 switch(tvp->cmd) {
1307 case DTV_ENUM_DELSYS:
1308 ncaps = 0;
1309 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1310 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1311 ncaps++;
1312 }
1313 tvp->u.buffer.len = ncaps;
1314 break;
1315 case DTV_FREQUENCY:
1316 tvp->u.data = c->frequency;
1317 break;
1318 case DTV_MODULATION:
1319 tvp->u.data = c->modulation;
1320 break;
1321 case DTV_BANDWIDTH_HZ:
1322 tvp->u.data = c->bandwidth_hz;
1323 break;
1324 case DTV_INVERSION:
1325 tvp->u.data = c->inversion;
1326 break;
1327 case DTV_SYMBOL_RATE:
1328 tvp->u.data = c->symbol_rate;
1329 break;
1330 case DTV_INNER_FEC:
1331 tvp->u.data = c->fec_inner;
1332 break;
1333 case DTV_PILOT:
1334 tvp->u.data = c->pilot;
1335 break;
1336 case DTV_ROLLOFF:
1337 tvp->u.data = c->rolloff;
1338 break;
1339 case DTV_DELIVERY_SYSTEM:
1340 tvp->u.data = c->delivery_system;
1341 break;
1342 case DTV_VOLTAGE:
1343 tvp->u.data = c->voltage;
1344 break;
1345 case DTV_TONE:
1346 tvp->u.data = c->sectone;
1347 break;
1348 case DTV_API_VERSION:
1349 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1350 break;
1351 case DTV_CODE_RATE_HP:
1352 tvp->u.data = c->code_rate_HP;
1353 break;
1354 case DTV_CODE_RATE_LP:
1355 tvp->u.data = c->code_rate_LP;
1356 break;
1357 case DTV_GUARD_INTERVAL:
1358 tvp->u.data = c->guard_interval;
1359 break;
1360 case DTV_TRANSMISSION_MODE:
1361 tvp->u.data = c->transmission_mode;
1362 break;
1363 case DTV_HIERARCHY:
1364 tvp->u.data = c->hierarchy;
1365 break;
1366 case DTV_INTERLEAVING:
1367 tvp->u.data = c->interleaving;
1368 break;
1369
1370 /* ISDB-T Support here */
1371 case DTV_ISDBT_PARTIAL_RECEPTION:
1372 tvp->u.data = c->isdbt_partial_reception;
1373 break;
1374 case DTV_ISDBT_SOUND_BROADCASTING:
1375 tvp->u.data = c->isdbt_sb_mode;
1376 break;
1377 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1378 tvp->u.data = c->isdbt_sb_subchannel;
1379 break;
1380 case DTV_ISDBT_SB_SEGMENT_IDX:
1381 tvp->u.data = c->isdbt_sb_segment_idx;
1382 break;
1383 case DTV_ISDBT_SB_SEGMENT_COUNT:
1384 tvp->u.data = c->isdbt_sb_segment_count;
1385 break;
1386 case DTV_ISDBT_LAYER_ENABLED:
1387 tvp->u.data = c->isdbt_layer_enabled;
1388 break;
1389 case DTV_ISDBT_LAYERA_FEC:
1390 tvp->u.data = c->layer[0].fec;
1391 break;
1392 case DTV_ISDBT_LAYERA_MODULATION:
1393 tvp->u.data = c->layer[0].modulation;
1394 break;
1395 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1396 tvp->u.data = c->layer[0].segment_count;
1397 break;
1398 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1399 tvp->u.data = c->layer[0].interleaving;
1400 break;
1401 case DTV_ISDBT_LAYERB_FEC:
1402 tvp->u.data = c->layer[1].fec;
1403 break;
1404 case DTV_ISDBT_LAYERB_MODULATION:
1405 tvp->u.data = c->layer[1].modulation;
1406 break;
1407 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1408 tvp->u.data = c->layer[1].segment_count;
1409 break;
1410 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1411 tvp->u.data = c->layer[1].interleaving;
1412 break;
1413 case DTV_ISDBT_LAYERC_FEC:
1414 tvp->u.data = c->layer[2].fec;
1415 break;
1416 case DTV_ISDBT_LAYERC_MODULATION:
1417 tvp->u.data = c->layer[2].modulation;
1418 break;
1419 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1420 tvp->u.data = c->layer[2].segment_count;
1421 break;
1422 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1423 tvp->u.data = c->layer[2].interleaving;
1424 break;
1425
1426 /* Multistream support */
1427 case DTV_STREAM_ID:
1428 case DTV_DVBT2_PLP_ID_LEGACY:
1429 tvp->u.data = c->stream_id;
1430 break;
1431
1432 /* ATSC-MH */
1433 case DTV_ATSCMH_FIC_VER:
1434 tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver;
1435 break;
1436 case DTV_ATSCMH_PARADE_ID:
1437 tvp->u.data = fe->dtv_property_cache.atscmh_parade_id;
1438 break;
1439 case DTV_ATSCMH_NOG:
1440 tvp->u.data = fe->dtv_property_cache.atscmh_nog;
1441 break;
1442 case DTV_ATSCMH_TNOG:
1443 tvp->u.data = fe->dtv_property_cache.atscmh_tnog;
1444 break;
1445 case DTV_ATSCMH_SGN:
1446 tvp->u.data = fe->dtv_property_cache.atscmh_sgn;
1447 break;
1448 case DTV_ATSCMH_PRC:
1449 tvp->u.data = fe->dtv_property_cache.atscmh_prc;
1450 break;
1451 case DTV_ATSCMH_RS_FRAME_MODE:
1452 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode;
1453 break;
1454 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1455 tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble;
1456 break;
1457 case DTV_ATSCMH_RS_CODE_MODE_PRI:
1458 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri;
1459 break;
1460 case DTV_ATSCMH_RS_CODE_MODE_SEC:
1461 tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec;
1462 break;
1463 case DTV_ATSCMH_SCCC_BLOCK_MODE:
1464 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode;
1465 break;
1466 case DTV_ATSCMH_SCCC_CODE_MODE_A:
1467 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a;
1468 break;
1469 case DTV_ATSCMH_SCCC_CODE_MODE_B:
1470 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b;
1471 break;
1472 case DTV_ATSCMH_SCCC_CODE_MODE_C:
1473 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c;
1474 break;
1475 case DTV_ATSCMH_SCCC_CODE_MODE_D:
1476 tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d;
1477 break;
1478
1479 case DTV_LNA:
1480 tvp->u.data = c->lna;
1481 break;
1482
1483 /* Fill quality measures */
1484 case DTV_STAT_SIGNAL_STRENGTH:
1485 tvp->u.st = c->strength;
1486 break;
1487 case DTV_STAT_CNR:
1488 tvp->u.st = c->cnr;
1489 break;
1490 case DTV_STAT_PRE_ERROR_BIT_COUNT:
1491 tvp->u.st = c->pre_bit_error;
1492 break;
1493 case DTV_STAT_PRE_TOTAL_BIT_COUNT:
1494 tvp->u.st = c->pre_bit_count;
1495 break;
1496 case DTV_STAT_POST_ERROR_BIT_COUNT:
1497 tvp->u.st = c->post_bit_error;
1498 break;
1499 case DTV_STAT_POST_TOTAL_BIT_COUNT:
1500 tvp->u.st = c->post_bit_count;
1501 break;
1502 case DTV_STAT_ERROR_BLOCK_COUNT:
1503 tvp->u.st = c->block_error;
1504 break;
1505 case DTV_STAT_TOTAL_BLOCK_COUNT:
1506 tvp->u.st = c->block_count;
1507 break;
1508 default:
1509 dev_dbg(fe->dvb->device,
1510 "%s: FE property %d doesn't exist\n",
1511 __func__, tvp->cmd);
1512 return -EINVAL;
1513 }
1514
1515 /* Allow the frontend to override outgoing properties */
1516 if (fe->ops.get_property) {
1517 r = fe->ops.get_property(fe, tvp);
1518 if (r < 0)
1519 return r;
1520 }
1521
1522 dtv_property_dump(fe, false, tvp);
1523
1524 return 0;
1525 }
1526
1527 static int dtv_set_frontend(struct dvb_frontend *fe);
1528
1529 static bool is_dvbv3_delsys(u32 delsys)
1530 {
1531 return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1532 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1533 }
1534
1535 /**
1536 * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type
1537 * @fe: struct frontend;
1538 * @delsys: DVBv5 type that will be used for emulation
1539 *
1540 * Provides emulation for delivery systems that are compatible with the old
1541 * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1542 * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1543 * parameters are compatible with DVB-S spec.
1544 */
1545 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
1546 {
1547 int i;
1548 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1549
1550 c->delivery_system = delsys;
1551
1552 /*
1553 * If the call is for ISDB-T, put it into full-seg, auto mode, TV
1554 */
1555 if (c->delivery_system == SYS_ISDBT) {
1556 dev_dbg(fe->dvb->device,
1557 "%s: Using defaults for SYS_ISDBT\n",
1558 __func__);
1559
1560 if (!c->bandwidth_hz)
1561 c->bandwidth_hz = 6000000;
1562
1563 c->isdbt_partial_reception = 0;
1564 c->isdbt_sb_mode = 0;
1565 c->isdbt_sb_subchannel = 0;
1566 c->isdbt_sb_segment_idx = 0;
1567 c->isdbt_sb_segment_count = 0;
1568 c->isdbt_layer_enabled = 7;
1569 for (i = 0; i < 3; i++) {
1570 c->layer[i].fec = FEC_AUTO;
1571 c->layer[i].modulation = QAM_AUTO;
1572 c->layer[i].interleaving = 0;
1573 c->layer[i].segment_count = 0;
1574 }
1575 }
1576 dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n",
1577 __func__, c->delivery_system);
1578
1579 return 0;
1580 }
1581
1582 /**
1583 * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call
1584 * @fe: frontend struct
1585 * @desired_system: delivery system requested by the user
1586 *
1587 * A DVBv5 call know what's the desired system it wants. So, set it.
1588 *
1589 * There are, however, a few known issues with early DVBv5 applications that
1590 * are also handled by this logic:
1591 *
1592 * 1) Some early apps use SYS_UNDEFINED as the desired delivery system.
1593 * This is an API violation, but, as we don't want to break userspace,
1594 * convert it to the first supported delivery system.
1595 * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for
1596 * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of
1597 * ISDB-T provided backward compat with DVB-T.
1598 */
1599 static int dvbv5_set_delivery_system(struct dvb_frontend *fe,
1600 u32 desired_system)
1601 {
1602 int ncaps;
1603 u32 delsys = SYS_UNDEFINED;
1604 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1605 enum dvbv3_emulation_type type;
1606
1607 /*
1608 * It was reported that some old DVBv5 applications were
1609 * filling delivery_system with SYS_UNDEFINED. If this happens,
1610 * assume that the application wants to use the first supported
1611 * delivery system.
1612 */
1613 if (desired_system == SYS_UNDEFINED)
1614 desired_system = fe->ops.delsys[0];
1615
1616 /*
1617 * This is a DVBv5 call. So, it likely knows the supported
1618 * delivery systems. So, check if the desired delivery system is
1619 * supported
1620 */
1621 ncaps = 0;
1622 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1623 if (fe->ops.delsys[ncaps] == desired_system) {
1624 c->delivery_system = desired_system;
1625 dev_dbg(fe->dvb->device,
1626 "%s: Changing delivery system to %d\n",
1627 __func__, desired_system);
1628 return 0;
1629 }
1630 ncaps++;
1631 }
1632
1633 /*
1634 * The requested delivery system isn't supported. Maybe userspace
1635 * is requesting a DVBv3 compatible delivery system.
1636 *
1637 * The emulation only works if the desired system is one of the
1638 * delivery systems supported by DVBv3 API
1639 */
1640 if (!is_dvbv3_delsys(desired_system)) {
1641 dev_dbg(fe->dvb->device,
1642 "%s: Delivery system %d not supported.\n",
1643 __func__, desired_system);
1644 return -EINVAL;
1645 }
1646
1647 type = dvbv3_type(desired_system);
1648
1649 /*
1650 * Get the last non-DVBv3 delivery system that has the same type
1651 * of the desired system
1652 */
1653 ncaps = 0;
1654 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1655 if (dvbv3_type(fe->ops.delsys[ncaps]) == type)
1656 delsys = fe->ops.delsys[ncaps];
1657 ncaps++;
1658 }
1659
1660 /* There's nothing compatible with the desired delivery system */
1661 if (delsys == SYS_UNDEFINED) {
1662 dev_dbg(fe->dvb->device,
1663 "%s: Delivery system %d not supported on emulation mode.\n",
1664 __func__, desired_system);
1665 return -EINVAL;
1666 }
1667
1668 dev_dbg(fe->dvb->device,
1669 "%s: Using delivery system %d emulated as if it were %d\n",
1670 __func__, delsys, desired_system);
1671
1672 return emulate_delivery_system(fe, desired_system);
1673 }
1674
1675 /**
1676 * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call
1677 * @fe: frontend struct
1678 *
1679 * A DVBv3 call doesn't know what's the desired system it wants. It also
1680 * doesn't allow to switch between different types. Due to that, userspace
1681 * should use DVBv5 instead.
1682 * However, in order to avoid breaking userspace API, limited backward
1683 * compatibility support is provided.
1684 *
1685 * There are some delivery systems that are incompatible with DVBv3 calls.
1686 *
1687 * This routine should work fine for frontends that support just one delivery
1688 * system.
1689 *
1690 * For frontends that support multiple frontends:
1691 * 1) It defaults to use the first supported delivery system. There's an
1692 * userspace application that allows changing it at runtime;
1693 *
1694 * 2) If the current delivery system is not compatible with DVBv3, it gets
1695 * the first one that it is compatible.
1696 *
1697 * NOTE: in order for this to work with applications like Kaffeine that
1698 * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1699 * DVB-S, drivers that support both DVB-S and DVB-S2 should have the
1700 * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back
1701 * to DVB-S.
1702 */
1703 static int dvbv3_set_delivery_system(struct dvb_frontend *fe)
1704 {
1705 int ncaps;
1706 u32 delsys = SYS_UNDEFINED;
1707 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1708
1709 /* If not set yet, defaults to the first supported delivery system */
1710 if (c->delivery_system == SYS_UNDEFINED)
1711 c->delivery_system = fe->ops.delsys[0];
1712
1713 /*
1714 * Trivial case: just use the current one, if it already a DVBv3
1715 * delivery system
1716 */
1717 if (is_dvbv3_delsys(c->delivery_system)) {
1718 dev_dbg(fe->dvb->device,
1719 "%s: Using delivery system to %d\n",
1720 __func__, c->delivery_system);
1721 return 0;
1722 }
1723
1724 /*
1725 * Seek for the first delivery system that it is compatible with a
1726 * DVBv3 standard
1727 */
1728 ncaps = 0;
1729 while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
1730 if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) {
1731 delsys = fe->ops.delsys[ncaps];
1732 break;
1733 }
1734 ncaps++;
1735 }
1736 if (delsys == SYS_UNDEFINED) {
1737 dev_dbg(fe->dvb->device,
1738 "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n",
1739 __func__);
1740 return -EINVAL;
1741 }
1742 return emulate_delivery_system(fe, delsys);
1743 }
1744
1745 static int dtv_property_process_set(struct dvb_frontend *fe,
1746 struct dtv_property *tvp,
1747 struct file *file)
1748 {
1749 int r = 0;
1750 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1751
1752 /* Allow the frontend to validate incoming properties */
1753 if (fe->ops.set_property) {
1754 r = fe->ops.set_property(fe, tvp);
1755 if (r < 0)
1756 return r;
1757 }
1758
1759 dtv_property_dump(fe, true, tvp);
1760
1761 switch(tvp->cmd) {
1762 case DTV_CLEAR:
1763 /*
1764 * Reset a cache of data specific to the frontend here. This does
1765 * not effect hardware.
1766 */
1767 dvb_frontend_clear_cache(fe);
1768 break;
1769 case DTV_TUNE:
1770 /* interpret the cache of data, build either a traditional frontend
1771 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1772 * ioctl.
1773 */
1774 c->state = tvp->cmd;
1775 dev_dbg(fe->dvb->device, "%s: Finalised property cache\n",
1776 __func__);
1777
1778 r = dtv_set_frontend(fe);
1779 break;
1780 case DTV_FREQUENCY:
1781 c->frequency = tvp->u.data;
1782 break;
1783 case DTV_MODULATION:
1784 c->modulation = tvp->u.data;
1785 break;
1786 case DTV_BANDWIDTH_HZ:
1787 c->bandwidth_hz = tvp->u.data;
1788 break;
1789 case DTV_INVERSION:
1790 c->inversion = tvp->u.data;
1791 break;
1792 case DTV_SYMBOL_RATE:
1793 c->symbol_rate = tvp->u.data;
1794 break;
1795 case DTV_INNER_FEC:
1796 c->fec_inner = tvp->u.data;
1797 break;
1798 case DTV_PILOT:
1799 c->pilot = tvp->u.data;
1800 break;
1801 case DTV_ROLLOFF:
1802 c->rolloff = tvp->u.data;
1803 break;
1804 case DTV_DELIVERY_SYSTEM:
1805 r = dvbv5_set_delivery_system(fe, tvp->u.data);
1806 break;
1807 case DTV_VOLTAGE:
1808 c->voltage = tvp->u.data;
1809 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1810 (void *)c->voltage);
1811 break;
1812 case DTV_TONE:
1813 c->sectone = tvp->u.data;
1814 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1815 (void *)c->sectone);
1816 break;
1817 case DTV_CODE_RATE_HP:
1818 c->code_rate_HP = tvp->u.data;
1819 break;
1820 case DTV_CODE_RATE_LP:
1821 c->code_rate_LP = tvp->u.data;
1822 break;
1823 case DTV_GUARD_INTERVAL:
1824 c->guard_interval = tvp->u.data;
1825 break;
1826 case DTV_TRANSMISSION_MODE:
1827 c->transmission_mode = tvp->u.data;
1828 break;
1829 case DTV_HIERARCHY:
1830 c->hierarchy = tvp->u.data;
1831 break;
1832 case DTV_INTERLEAVING:
1833 c->interleaving = tvp->u.data;
1834 break;
1835
1836 /* ISDB-T Support here */
1837 case DTV_ISDBT_PARTIAL_RECEPTION:
1838 c->isdbt_partial_reception = tvp->u.data;
1839 break;
1840 case DTV_ISDBT_SOUND_BROADCASTING:
1841 c->isdbt_sb_mode = tvp->u.data;
1842 break;
1843 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1844 c->isdbt_sb_subchannel = tvp->u.data;
1845 break;
1846 case DTV_ISDBT_SB_SEGMENT_IDX:
1847 c->isdbt_sb_segment_idx = tvp->u.data;
1848 break;
1849 case DTV_ISDBT_SB_SEGMENT_COUNT:
1850 c->isdbt_sb_segment_count = tvp->u.data;
1851 break;
1852 case DTV_ISDBT_LAYER_ENABLED:
1853 c->isdbt_layer_enabled = tvp->u.data;
1854 break;
1855 case DTV_ISDBT_LAYERA_FEC:
1856 c->layer[0].fec = tvp->u.data;
1857 break;
1858 case DTV_ISDBT_LAYERA_MODULATION:
1859 c->layer[0].modulation = tvp->u.data;
1860 break;
1861 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1862 c->layer[0].segment_count = tvp->u.data;
1863 break;
1864 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1865 c->layer[0].interleaving = tvp->u.data;
1866 break;
1867 case DTV_ISDBT_LAYERB_FEC:
1868 c->layer[1].fec = tvp->u.data;
1869 break;
1870 case DTV_ISDBT_LAYERB_MODULATION:
1871 c->layer[1].modulation = tvp->u.data;
1872 break;
1873 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1874 c->layer[1].segment_count = tvp->u.data;
1875 break;
1876 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1877 c->layer[1].interleaving = tvp->u.data;
1878 break;
1879 case DTV_ISDBT_LAYERC_FEC:
1880 c->layer[2].fec = tvp->u.data;
1881 break;
1882 case DTV_ISDBT_LAYERC_MODULATION:
1883 c->layer[2].modulation = tvp->u.data;
1884 break;
1885 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1886 c->layer[2].segment_count = tvp->u.data;
1887 break;
1888 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1889 c->layer[2].interleaving = tvp->u.data;
1890 break;
1891
1892 /* Multistream support */
1893 case DTV_STREAM_ID:
1894 case DTV_DVBT2_PLP_ID_LEGACY:
1895 c->stream_id = tvp->u.data;
1896 break;
1897
1898 /* ATSC-MH */
1899 case DTV_ATSCMH_PARADE_ID:
1900 fe->dtv_property_cache.atscmh_parade_id = tvp->u.data;
1901 break;
1902 case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
1903 fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data;
1904 break;
1905
1906 case DTV_LNA:
1907 c->lna = tvp->u.data;
1908 if (fe->ops.set_lna)
1909 r = fe->ops.set_lna(fe);
1910 if (r < 0)
1911 c->lna = LNA_AUTO;
1912 break;
1913
1914 default:
1915 return -EINVAL;
1916 }
1917
1918 return r;
1919 }
1920
1921 static int dvb_frontend_ioctl(struct file *file,
1922 unsigned int cmd, void *parg)
1923 {
1924 struct dvb_device *dvbdev = file->private_data;
1925 struct dvb_frontend *fe = dvbdev->priv;
1926 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1927 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1928 int err = -EOPNOTSUPP;
1929
1930 dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd));
1931 if (down_interruptible(&fepriv->sem))
1932 return -ERESTARTSYS;
1933
1934 if (fe->exit != DVB_FE_NO_EXIT) {
1935 up(&fepriv->sem);
1936 return -ENODEV;
1937 }
1938
1939 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1940 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1941 cmd == FE_DISEQC_RECV_SLAVE_REPLY)) {
1942 up(&fepriv->sem);
1943 return -EPERM;
1944 }
1945
1946 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1947 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1948 else {
1949 c->state = DTV_UNDEFINED;
1950 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1951 }
1952
1953 up(&fepriv->sem);
1954 return err;
1955 }
1956
1957 static int dvb_frontend_ioctl_properties(struct file *file,
1958 unsigned int cmd, void *parg)
1959 {
1960 struct dvb_device *dvbdev = file->private_data;
1961 struct dvb_frontend *fe = dvbdev->priv;
1962 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1963 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1964 int err = 0;
1965
1966 struct dtv_properties *tvps = parg;
1967 struct dtv_property *tvp = NULL;
1968 int i;
1969
1970 dev_dbg(fe->dvb->device, "%s:\n", __func__);
1971
1972 if (cmd == FE_SET_PROPERTY) {
1973 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1974 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
1975
1976 /* Put an arbitrary limit on the number of messages that can
1977 * be sent at once */
1978 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1979 return -EINVAL;
1980
1981 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
1982 if (IS_ERR(tvp))
1983 return PTR_ERR(tvp);
1984
1985 for (i = 0; i < tvps->num; i++) {
1986 err = dtv_property_process_set(fe, tvp + i, file);
1987 if (err < 0)
1988 goto out;
1989 (tvp + i)->result = err;
1990 }
1991
1992 if (c->state == DTV_TUNE)
1993 dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__);
1994
1995 } else if (cmd == FE_GET_PROPERTY) {
1996 struct dtv_frontend_properties getp = fe->dtv_property_cache;
1997
1998 dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num);
1999 dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props);
2000
2001 /* Put an arbitrary limit on the number of messages that can
2002 * be sent at once */
2003 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
2004 return -EINVAL;
2005
2006 tvp = memdup_user(tvps->props, tvps->num * sizeof(*tvp));
2007 if (IS_ERR(tvp))
2008 return PTR_ERR(tvp);
2009
2010 /*
2011 * Let's use our own copy of property cache, in order to
2012 * avoid mangling with DTV zigzag logic, as drivers might
2013 * return crap, if they don't check if the data is available
2014 * before updating the properties cache.
2015 */
2016 if (fepriv->state != FESTATE_IDLE) {
2017 err = dtv_get_frontend(fe, &getp, NULL);
2018 if (err < 0)
2019 goto out;
2020 }
2021 for (i = 0; i < tvps->num; i++) {
2022 err = dtv_property_process_get(fe, &getp, tvp + i, file);
2023 if (err < 0)
2024 goto out;
2025 (tvp + i)->result = err;
2026 }
2027
2028 if (copy_to_user((void __user *)tvps->props, tvp,
2029 tvps->num * sizeof(struct dtv_property))) {
2030 err = -EFAULT;
2031 goto out;
2032 }
2033
2034 } else
2035 err = -EOPNOTSUPP;
2036
2037 out:
2038 kfree(tvp);
2039 return err;
2040 }
2041
2042 static int dtv_set_frontend(struct dvb_frontend *fe)
2043 {
2044 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2045 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2046 struct dvb_frontend_tune_settings fetunesettings;
2047 u32 rolloff = 0;
2048
2049 if (dvb_frontend_check_parameters(fe) < 0)
2050 return -EINVAL;
2051
2052 /*
2053 * Initialize output parameters to match the values given by
2054 * the user. FE_SET_FRONTEND triggers an initial frontend event
2055 * with status = 0, which copies output parameters to userspace.
2056 */
2057 dtv_property_legacy_params_sync(fe, c, &fepriv->parameters_out);
2058
2059 /*
2060 * Be sure that the bandwidth will be filled for all
2061 * non-satellite systems, as tuners need to know what
2062 * low pass/Nyquist half filter should be applied, in
2063 * order to avoid inter-channel noise.
2064 *
2065 * ISDB-T and DVB-T/T2 already sets bandwidth.
2066 * ATSC and DVB-C don't set, so, the core should fill it.
2067 *
2068 * On DVB-C Annex A and C, the bandwidth is a function of
2069 * the roll-off and symbol rate. Annex B defines different
2070 * roll-off factors depending on the modulation. Fortunately,
2071 * Annex B is only used with 6MHz, so there's no need to
2072 * calculate it.
2073 *
2074 * While not officially supported, a side effect of handling it at
2075 * the cache level is that a program could retrieve the bandwidth
2076 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
2077 */
2078 switch (c->delivery_system) {
2079 case SYS_ATSC:
2080 case SYS_DVBC_ANNEX_B:
2081 c->bandwidth_hz = 6000000;
2082 break;
2083 case SYS_DVBC_ANNEX_A:
2084 rolloff = 115;
2085 break;
2086 case SYS_DVBC_ANNEX_C:
2087 rolloff = 113;
2088 break;
2089 case SYS_DVBS:
2090 case SYS_TURBO:
2091 case SYS_ISDBS:
2092 rolloff = 135;
2093 break;
2094 case SYS_DVBS2:
2095 switch (c->rolloff) {
2096 case ROLLOFF_20:
2097 rolloff = 120;
2098 break;
2099 case ROLLOFF_25:
2100 rolloff = 125;
2101 break;
2102 default:
2103 case ROLLOFF_35:
2104 rolloff = 135;
2105 }
2106 break;
2107 default:
2108 break;
2109 }
2110 if (rolloff)
2111 c->bandwidth_hz = mult_frac(c->symbol_rate, rolloff, 100);
2112
2113 /* force auto frequency inversion if requested */
2114 if (dvb_force_auto_inversion)
2115 c->inversion = INVERSION_AUTO;
2116
2117 /*
2118 * without hierarchical coding code_rate_LP is irrelevant,
2119 * so we tolerate the otherwise invalid FEC_NONE setting
2120 */
2121 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
2122 c->code_rate_LP = FEC_AUTO;
2123
2124 /* get frontend-specific tuning settings */
2125 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
2126 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
2127 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
2128 fepriv->max_drift = fetunesettings.max_drift;
2129 fepriv->step_size = fetunesettings.step_size;
2130 } else {
2131 /* default values */
2132 switch (c->delivery_system) {
2133 case SYS_DVBS:
2134 case SYS_DVBS2:
2135 case SYS_ISDBS:
2136 case SYS_TURBO:
2137 case SYS_DVBC_ANNEX_A:
2138 case SYS_DVBC_ANNEX_C:
2139 fepriv->min_delay = HZ / 20;
2140 fepriv->step_size = c->symbol_rate / 16000;
2141 fepriv->max_drift = c->symbol_rate / 2000;
2142 break;
2143 case SYS_DVBT:
2144 case SYS_DVBT2:
2145 case SYS_ISDBT:
2146 case SYS_DTMB:
2147 fepriv->min_delay = HZ / 20;
2148 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
2149 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
2150 break;
2151 default:
2152 /*
2153 * FIXME: This sounds wrong! if freqency_stepsize is
2154 * defined by the frontend, why not use it???
2155 */
2156 fepriv->min_delay = HZ / 20;
2157 fepriv->step_size = 0; /* no zigzag */
2158 fepriv->max_drift = 0;
2159 break;
2160 }
2161 }
2162 if (dvb_override_tune_delay > 0)
2163 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
2164
2165 fepriv->state = FESTATE_RETUNE;
2166
2167 /* Request the search algorithm to search */
2168 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
2169
2170 dvb_frontend_clear_events(fe);
2171 dvb_frontend_add_event(fe, 0);
2172 dvb_frontend_wakeup(fe);
2173 fepriv->status = 0;
2174
2175 return 0;
2176 }
2177
2178
2179 static int dvb_frontend_ioctl_legacy(struct file *file,
2180 unsigned int cmd, void *parg)
2181 {
2182 struct dvb_device *dvbdev = file->private_data;
2183 struct dvb_frontend *fe = dvbdev->priv;
2184 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2185 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
2186 int err = -EOPNOTSUPP;
2187
2188 switch (cmd) {
2189 case FE_GET_INFO: {
2190 struct dvb_frontend_info* info = parg;
2191
2192 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
2193 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
2194
2195 /*
2196 * Associate the 4 delivery systems supported by DVBv3
2197 * API with their DVBv5 counterpart. For the other standards,
2198 * use the closest type, assuming that it would hopefully
2199 * work with a DVBv3 application.
2200 * It should be noticed that, on multi-frontend devices with
2201 * different types (terrestrial and cable, for example),
2202 * a pure DVBv3 application won't be able to use all delivery
2203 * systems. Yet, changing the DVBv5 cache to the other delivery
2204 * system should be enough for making it work.
2205 */
2206 switch (dvbv3_type(c->delivery_system)) {
2207 case DVBV3_QPSK:
2208 info->type = FE_QPSK;
2209 break;
2210 case DVBV3_ATSC:
2211 info->type = FE_ATSC;
2212 break;
2213 case DVBV3_QAM:
2214 info->type = FE_QAM;
2215 break;
2216 case DVBV3_OFDM:
2217 info->type = FE_OFDM;
2218 break;
2219 default:
2220 dev_err(fe->dvb->device,
2221 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2222 __func__, c->delivery_system);
2223 fe->ops.info.type = FE_OFDM;
2224 }
2225 dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
2226 __func__, c->delivery_system, fe->ops.info.type);
2227
2228 /* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
2229 if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
2230 info->caps |= FE_CAN_INVERSION_AUTO;
2231 err = 0;
2232 break;
2233 }
2234
2235 case FE_READ_STATUS: {
2236 enum fe_status *status = parg;
2237
2238 /* if retune was requested but hasn't occurred yet, prevent
2239 * that user get signal state from previous tuning */
2240 if (fepriv->state == FESTATE_RETUNE ||
2241 fepriv->state == FESTATE_ERROR) {
2242 err=0;
2243 *status = 0;
2244 break;
2245 }
2246
2247 if (fe->ops.read_status)
2248 err = fe->ops.read_status(fe, status);
2249 break;
2250 }
2251
2252 case FE_READ_BER:
2253 if (fe->ops.read_ber) {
2254 if (fepriv->thread)
2255 err = fe->ops.read_ber(fe, (__u32 *) parg);
2256 else
2257 err = -EAGAIN;
2258 }
2259 break;
2260
2261 case FE_READ_SIGNAL_STRENGTH:
2262 if (fe->ops.read_signal_strength) {
2263 if (fepriv->thread)
2264 err = fe->ops.read_signal_strength(fe, (__u16 *) parg);
2265 else
2266 err = -EAGAIN;
2267 }
2268 break;
2269
2270 case FE_READ_SNR:
2271 if (fe->ops.read_snr) {
2272 if (fepriv->thread)
2273 err = fe->ops.read_snr(fe, (__u16 *) parg);
2274 else
2275 err = -EAGAIN;
2276 }
2277 break;
2278
2279 case FE_READ_UNCORRECTED_BLOCKS:
2280 if (fe->ops.read_ucblocks) {
2281 if (fepriv->thread)
2282 err = fe->ops.read_ucblocks(fe, (__u32 *) parg);
2283 else
2284 err = -EAGAIN;
2285 }
2286 break;
2287
2288 case FE_DISEQC_RESET_OVERLOAD:
2289 if (fe->ops.diseqc_reset_overload) {
2290 err = fe->ops.diseqc_reset_overload(fe);
2291 fepriv->state = FESTATE_DISEQC;
2292 fepriv->status = 0;
2293 }
2294 break;
2295
2296 case FE_DISEQC_SEND_MASTER_CMD:
2297 if (fe->ops.diseqc_send_master_cmd) {
2298 struct dvb_diseqc_master_cmd *cmd = parg;
2299
2300 if (cmd->msg_len > sizeof(cmd->msg)) {
2301 err = -EINVAL;
2302 break;
2303 }
2304 err = fe->ops.diseqc_send_master_cmd(fe, cmd);
2305 fepriv->state = FESTATE_DISEQC;
2306 fepriv->status = 0;
2307 }
2308 break;
2309
2310 case FE_DISEQC_SEND_BURST:
2311 if (fe->ops.diseqc_send_burst) {
2312 err = fe->ops.diseqc_send_burst(fe,
2313 (enum fe_sec_mini_cmd)parg);
2314 fepriv->state = FESTATE_DISEQC;
2315 fepriv->status = 0;
2316 }
2317 break;
2318
2319 case FE_SET_TONE:
2320 if (fe->ops.set_tone) {
2321 err = fe->ops.set_tone(fe,
2322 (enum fe_sec_tone_mode)parg);
2323 fepriv->tone = (enum fe_sec_tone_mode)parg;
2324 fepriv->state = FESTATE_DISEQC;
2325 fepriv->status = 0;
2326 }
2327 break;
2328
2329 case FE_SET_VOLTAGE:
2330 if (fe->ops.set_voltage) {
2331 err = fe->ops.set_voltage(fe,
2332 (enum fe_sec_voltage)parg);
2333 fepriv->voltage = (enum fe_sec_voltage)parg;
2334 fepriv->state = FESTATE_DISEQC;
2335 fepriv->status = 0;
2336 }
2337 break;
2338
2339 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2340 if (fe->ops.dishnetwork_send_legacy_command) {
2341 err = fe->ops.dishnetwork_send_legacy_command(fe,
2342 (unsigned long)parg);
2343 fepriv->state = FESTATE_DISEQC;
2344 fepriv->status = 0;
2345 } else if (fe->ops.set_voltage) {
2346 /*
2347 * NOTE: This is a fallback condition. Some frontends
2348 * (stv0299 for instance) take longer than 8msec to
2349 * respond to a set_voltage command. Those switches
2350 * need custom routines to switch properly. For all
2351 * other frontends, the following should work ok.
2352 * Dish network legacy switches (as used by Dish500)
2353 * are controlled by sending 9-bit command words
2354 * spaced 8msec apart.
2355 * the actual command word is switch/port dependent
2356 * so it is up to the userspace application to send
2357 * the right command.
2358 * The command must always start with a '0' after
2359 * initialization, so parg is 8 bits and does not
2360 * include the initialization or start bit
2361 */
2362 unsigned long swcmd = ((unsigned long) parg) << 1;
2363 ktime_t nexttime;
2364 ktime_t tv[10];
2365 int i;
2366 u8 last = 1;
2367 if (dvb_frontend_debug)
2368 dprintk("%s switch command: 0x%04lx\n",
2369 __func__, swcmd);
2370 nexttime = ktime_get_boottime();
2371 if (dvb_frontend_debug)
2372 tv[0] = nexttime;
2373 /* before sending a command, initialize by sending
2374 * a 32ms 18V to the switch
2375 */
2376 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2377 dvb_frontend_sleep_until(&nexttime, 32000);
2378
2379 for (i = 0; i < 9; i++) {
2380 if (dvb_frontend_debug)
2381 tv[i+1] = ktime_get_boottime();
2382 if ((swcmd & 0x01) != last) {
2383 /* set voltage to (last ? 13V : 18V) */
2384 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2385 last = (last) ? 0 : 1;
2386 }
2387 swcmd = swcmd >> 1;
2388 if (i != 8)
2389 dvb_frontend_sleep_until(&nexttime, 8000);
2390 }
2391 if (dvb_frontend_debug) {
2392 dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n",
2393 __func__, fe->dvb->num);
2394 for (i = 1; i < 10; i++)
2395 pr_info("%d: %d\n", i,
2396 (int) ktime_us_delta(tv[i], tv[i-1]));
2397 }
2398 err = 0;
2399 fepriv->state = FESTATE_DISEQC;
2400 fepriv->status = 0;
2401 }
2402 break;
2403
2404 case FE_DISEQC_RECV_SLAVE_REPLY:
2405 if (fe->ops.diseqc_recv_slave_reply)
2406 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2407 break;
2408
2409 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2410 if (fe->ops.enable_high_lnb_voltage)
2411 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2412 break;
2413
2414 case FE_SET_FRONTEND:
2415 err = dvbv3_set_delivery_system(fe);
2416 if (err)
2417 break;
2418
2419 err = dtv_property_cache_sync(fe, c, parg);
2420 if (err)
2421 break;
2422 err = dtv_set_frontend(fe);
2423 break;
2424 case FE_GET_EVENT:
2425 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2426 break;
2427
2428 case FE_GET_FRONTEND: {
2429 struct dtv_frontend_properties getp = fe->dtv_property_cache;
2430
2431 /*
2432 * Let's use our own copy of property cache, in order to
2433 * avoid mangling with DTV zigzag logic, as drivers might
2434 * return crap, if they don't check if the data is available
2435 * before updating the properties cache.
2436 */
2437 err = dtv_get_frontend(fe, &getp, parg);
2438 break;
2439 }
2440 case FE_SET_FRONTEND_TUNE_MODE:
2441 fepriv->tune_mode_flags = (unsigned long) parg;
2442 err = 0;
2443 break;
2444 }
2445
2446 return err;
2447 }
2448
2449
2450 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2451 {
2452 struct dvb_device *dvbdev = file->private_data;
2453 struct dvb_frontend *fe = dvbdev->priv;
2454 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2455
2456 dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__);
2457
2458 poll_wait (file, &fepriv->events.wait_queue, wait);
2459
2460 if (fepriv->events.eventw != fepriv->events.eventr)
2461 return (POLLIN | POLLRDNORM | POLLPRI);
2462
2463 return 0;
2464 }
2465
2466 static int dvb_frontend_open(struct inode *inode, struct file *file)
2467 {
2468 struct dvb_device *dvbdev = file->private_data;
2469 struct dvb_frontend *fe = dvbdev->priv;
2470 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2471 struct dvb_adapter *adapter = fe->dvb;
2472 int ret;
2473
2474 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2475 if (fe->exit == DVB_FE_DEVICE_REMOVED)
2476 return -ENODEV;
2477
2478 if (adapter->mfe_shared) {
2479 mutex_lock (&adapter->mfe_lock);
2480
2481 if (adapter->mfe_dvbdev == NULL)
2482 adapter->mfe_dvbdev = dvbdev;
2483
2484 else if (adapter->mfe_dvbdev != dvbdev) {
2485 struct dvb_device
2486 *mfedev = adapter->mfe_dvbdev;
2487 struct dvb_frontend
2488 *mfe = mfedev->priv;
2489 struct dvb_frontend_private
2490 *mfepriv = mfe->frontend_priv;
2491 int mferetry = (dvb_mfe_wait_time << 1);
2492
2493 mutex_unlock (&adapter->mfe_lock);
2494 while (mferetry-- && (mfedev->users != -1 ||
2495 mfepriv->thread != NULL)) {
2496 if(msleep_interruptible(500)) {
2497 if(signal_pending(current))
2498 return -EINTR;
2499 }
2500 }
2501
2502 mutex_lock (&adapter->mfe_lock);
2503 if(adapter->mfe_dvbdev != dvbdev) {
2504 mfedev = adapter->mfe_dvbdev;
2505 mfe = mfedev->priv;
2506 mfepriv = mfe->frontend_priv;
2507 if (mfedev->users != -1 ||
2508 mfepriv->thread != NULL) {
2509 mutex_unlock (&adapter->mfe_lock);
2510 return -EBUSY;
2511 }
2512 adapter->mfe_dvbdev = dvbdev;
2513 }
2514 }
2515 }
2516
2517 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2518 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2519 goto err0;
2520
2521 /* If we took control of the bus, we need to force
2522 reinitialization. This is because many ts_bus_ctrl()
2523 functions strobe the RESET pin on the demod, and if the
2524 frontend thread already exists then the dvb_init() routine
2525 won't get called (which is what usually does initial
2526 register configuration). */
2527 fepriv->reinitialise = 1;
2528 }
2529
2530 if ((ret = dvb_generic_open (inode, file)) < 0)
2531 goto err1;
2532
2533 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2534 /* normal tune mode when opened R/W */
2535 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2536 fepriv->tone = -1;
2537 fepriv->voltage = -1;
2538
2539 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2540 if (fe->dvb->mdev && fe->dvb->mdev->enable_source) {
2541 ret = fe->dvb->mdev->enable_source(dvbdev->entity,
2542 &fepriv->pipe);
2543 if (ret) {
2544 dev_err(fe->dvb->device,
2545 "Tuner is busy. Error %d\n", ret);
2546 goto err2;
2547 }
2548 }
2549 #endif
2550 ret = dvb_frontend_start (fe);
2551 if (ret)
2552 goto err3;
2553
2554 /* empty event queue */
2555 fepriv->events.eventr = fepriv->events.eventw = 0;
2556 }
2557
2558 dvb_frontend_private_get(fepriv);
2559
2560 if (adapter->mfe_shared)
2561 mutex_unlock (&adapter->mfe_lock);
2562 return ret;
2563
2564 err3:
2565 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
2566 if (fe->dvb->mdev && fe->dvb->mdev->disable_source)
2567 fe->dvb->mdev->disable_source(dvbdev->entity);
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 && fe->dvb->mdev->disable_source)
2600 fe->dvb->mdev->disable_source(dvbdev->entity);
2601 #endif
2602 if (fe->exit != DVB_FE_NO_EXIT)
2603 wake_up(&dvbdev->wait_queue);
2604 if (fe->ops.ts_bus_ctrl)
2605 fe->ops.ts_bus_ctrl(fe, 0);
2606 }
2607
2608 dvb_frontend_private_put(fepriv);
2609
2610 return ret;
2611 }
2612
2613 static const struct file_operations dvb_frontend_fops = {
2614 .owner = THIS_MODULE,
2615 .unlocked_ioctl = dvb_generic_ioctl,
2616 .poll = dvb_frontend_poll,
2617 .open = dvb_frontend_open,
2618 .release = dvb_frontend_release,
2619 .llseek = noop_llseek,
2620 };
2621
2622 int dvb_frontend_suspend(struct dvb_frontend *fe)
2623 {
2624 int ret = 0;
2625
2626 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2627 fe->id);
2628
2629 if (fe->ops.tuner_ops.suspend)
2630 ret = fe->ops.tuner_ops.suspend(fe);
2631 else if (fe->ops.tuner_ops.sleep)
2632 ret = fe->ops.tuner_ops.sleep(fe);
2633
2634 if (fe->ops.sleep)
2635 ret = fe->ops.sleep(fe);
2636
2637 return ret;
2638 }
2639 EXPORT_SYMBOL(dvb_frontend_suspend);
2640
2641 int dvb_frontend_resume(struct dvb_frontend *fe)
2642 {
2643 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2644 int ret = 0;
2645
2646 dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num,
2647 fe->id);
2648
2649 fe->exit = DVB_FE_DEVICE_RESUME;
2650 if (fe->ops.init)
2651 ret = fe->ops.init(fe);
2652
2653 if (fe->ops.tuner_ops.resume)
2654 ret = fe->ops.tuner_ops.resume(fe);
2655 else if (fe->ops.tuner_ops.init)
2656 ret = fe->ops.tuner_ops.init(fe);
2657
2658 if (fe->ops.set_tone && fepriv->tone != -1)
2659 fe->ops.set_tone(fe, fepriv->tone);
2660 if (fe->ops.set_voltage && fepriv->voltage != -1)
2661 fe->ops.set_voltage(fe, fepriv->voltage);
2662
2663 fe->exit = DVB_FE_NO_EXIT;
2664 fepriv->state = FESTATE_RETUNE;
2665 dvb_frontend_wakeup(fe);
2666
2667 return ret;
2668 }
2669 EXPORT_SYMBOL(dvb_frontend_resume);
2670
2671 int dvb_register_frontend(struct dvb_adapter* dvb,
2672 struct dvb_frontend* fe)
2673 {
2674 struct dvb_frontend_private *fepriv;
2675 const struct dvb_device dvbdev_template = {
2676 .users = ~0,
2677 .writers = 1,
2678 .readers = (~0)-1,
2679 .fops = &dvb_frontend_fops,
2680 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
2681 .name = fe->ops.info.name,
2682 #endif
2683 .kernel_ioctl = dvb_frontend_ioctl
2684 };
2685
2686 dev_dbg(dvb->device, "%s:\n", __func__);
2687
2688 if (mutex_lock_interruptible(&frontend_mutex))
2689 return -ERESTARTSYS;
2690
2691 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2692 if (fe->frontend_priv == NULL) {
2693 mutex_unlock(&frontend_mutex);
2694 return -ENOMEM;
2695 }
2696 fepriv = fe->frontend_priv;
2697
2698 kref_init(&fepriv->refcount);
2699
2700 sema_init(&fepriv->sem, 1);
2701 init_waitqueue_head (&fepriv->wait_queue);
2702 init_waitqueue_head (&fepriv->events.wait_queue);
2703 mutex_init(&fepriv->events.mtx);
2704 fe->dvb = dvb;
2705 fepriv->inversion = INVERSION_OFF;
2706
2707 dev_info(fe->dvb->device,
2708 "DVB: registering adapter %i frontend %i (%s)...\n",
2709 fe->dvb->num, fe->id, fe->ops.info.name);
2710
2711 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2712 fe, DVB_DEVICE_FRONTEND, 0);
2713
2714 /*
2715 * Initialize the cache to the proper values according with the
2716 * first supported delivery system (ops->delsys[0])
2717 */
2718
2719 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2720 dvb_frontend_clear_cache(fe);
2721
2722 mutex_unlock(&frontend_mutex);
2723 return 0;
2724 }
2725 EXPORT_SYMBOL(dvb_register_frontend);
2726
2727 int dvb_unregister_frontend(struct dvb_frontend* fe)
2728 {
2729 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2730 dev_dbg(fe->dvb->device, "%s:\n", __func__);
2731
2732 mutex_lock(&frontend_mutex);
2733 dvb_frontend_stop (fe);
2734 dvb_unregister_device (fepriv->dvbdev);
2735
2736 /* fe is invalid now */
2737 mutex_unlock(&frontend_mutex);
2738 dvb_frontend_private_put(fepriv);
2739 return 0;
2740 }
2741 EXPORT_SYMBOL(dvb_unregister_frontend);
2742
2743 #ifdef CONFIG_MEDIA_ATTACH
2744 void dvb_frontend_detach(struct dvb_frontend* fe)
2745 {
2746 void *ptr;
2747
2748 if (fe->ops.release_sec) {
2749 fe->ops.release_sec(fe);
2750 dvb_detach(fe->ops.release_sec);
2751 }
2752 if (fe->ops.tuner_ops.release) {
2753 fe->ops.tuner_ops.release(fe);
2754 dvb_detach(fe->ops.tuner_ops.release);
2755 }
2756 if (fe->ops.analog_ops.release) {
2757 fe->ops.analog_ops.release(fe);
2758 dvb_detach(fe->ops.analog_ops.release);
2759 }
2760 ptr = (void*)fe->ops.release;
2761 if (ptr) {
2762 fe->ops.release(fe);
2763 dvb_detach(ptr);
2764 }
2765 }
2766 #else
2767 void dvb_frontend_detach(struct dvb_frontend* fe)
2768 {
2769 if (fe->ops.release_sec)
2770 fe->ops.release_sec(fe);
2771 if (fe->ops.tuner_ops.release)
2772 fe->ops.tuner_ops.release(fe);
2773 if (fe->ops.analog_ops.release)
2774 fe->ops.analog_ops.release(fe);
2775 if (fe->ops.release)
2776 fe->ops.release(fe);
2777 }
2778 #endif
2779 EXPORT_SYMBOL(dvb_frontend_detach);
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