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Merge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[cris-mirror.git] / drivers / media / dvb / dvb-core / dvb_frontend.c
blobcad6634610ea5fb0d6ea59e6c86e322bd1e9638e
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 #include <linux/string.h>
29 #include <linux/kernel.h>
30 #include <linux/sched.h>
31 #include <linux/wait.h>
32 #include <linux/slab.h>
33 #include <linux/poll.h>
34 #include <linux/semaphore.h>
35 #include <linux/module.h>
36 #include <linux/list.h>
37 #include <linux/freezer.h>
38 #include <linux/jiffies.h>
39 #include <linux/kthread.h>
40 #include <asm/processor.h>
41
42 #include "dvb_frontend.h"
43 #include "dvbdev.h"
44 #include <linux/dvb/version.h>
45
46 static int dvb_frontend_debug;
47 static int dvb_shutdown_timeout;
48 static int dvb_force_auto_inversion;
49 static int dvb_override_tune_delay;
50 static int dvb_powerdown_on_sleep = 1;
51 static int dvb_mfe_wait_time = 5;
52
53 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
54 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
55 module_param(dvb_shutdown_timeout, int, 0644);
56 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
57 module_param(dvb_force_auto_inversion, int, 0644);
58 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
59 module_param(dvb_override_tune_delay, int, 0644);
60 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
61 module_param(dvb_powerdown_on_sleep, int, 0644);
62 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
63 module_param(dvb_mfe_wait_time, int, 0644);
64 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)");
65
66 #define dprintk if (dvb_frontend_debug) printk
67
68 #define FESTATE_IDLE 1
69 #define FESTATE_RETUNE 2
70 #define FESTATE_TUNING_FAST 4
71 #define FESTATE_TUNING_SLOW 8
72 #define FESTATE_TUNED 16
73 #define FESTATE_ZIGZAG_FAST 32
74 #define FESTATE_ZIGZAG_SLOW 64
75 #define FESTATE_DISEQC 128
76 #define FESTATE_ERROR 256
77 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
78 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
79 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
80 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
81
82 #define FE_ALGO_HW 1
83 /*
84 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
85 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
86 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
87 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
88 * FESTATE_TUNED. The frontend has successfully locked on.
89 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
90 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
91 * FESTATE_DISEQC. A DISEQC command has just been issued.
92 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
93 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
94 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
95 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
96 */
97
98 #define DVB_FE_NO_EXIT 0
99 #define DVB_FE_NORMAL_EXIT 1
100 #define DVB_FE_DEVICE_REMOVED 2
101
102 static DEFINE_MUTEX(frontend_mutex);
103
104 struct dvb_frontend_private {
105
106 /* thread/frontend values */
107 struct dvb_device *dvbdev;
108 struct dvb_frontend_parameters parameters;
109 struct dvb_fe_events events;
110 struct semaphore sem;
111 struct list_head list_head;
112 wait_queue_head_t wait_queue;
113 struct task_struct *thread;
114 unsigned long release_jiffies;
115 unsigned int exit;
116 unsigned int wakeup;
117 fe_status_t status;
118 unsigned long tune_mode_flags;
119 unsigned int delay;
120 unsigned int reinitialise;
121 int tone;
122 int voltage;
123
124 /* swzigzag values */
125 unsigned int state;
126 unsigned int bending;
127 int lnb_drift;
128 unsigned int inversion;
129 unsigned int auto_step;
130 unsigned int auto_sub_step;
131 unsigned int started_auto_step;
132 unsigned int min_delay;
133 unsigned int max_drift;
134 unsigned int step_size;
135 int quality;
136 unsigned int check_wrapped;
137 enum dvbfe_search algo_status;
138 };
139
140 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
141
142 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
143 {
144 struct dvb_frontend_private *fepriv = fe->frontend_priv;
145 struct dvb_fe_events *events = &fepriv->events;
146 struct dvb_frontend_event *e;
147 int wp;
148
149 dprintk ("%s\n", __func__);
150
151 if (mutex_lock_interruptible (&events->mtx))
152 return;
153
154 wp = (events->eventw + 1) % MAX_EVENT;
155
156 if (wp == events->eventr) {
157 events->overflow = 1;
158 events->eventr = (events->eventr + 1) % MAX_EVENT;
159 }
160
161 e = &events->events[events->eventw];
162
163 memcpy (&e->parameters, &fepriv->parameters,
164 sizeof (struct dvb_frontend_parameters));
165
166 if (status & FE_HAS_LOCK)
167 if (fe->ops.get_frontend)
168 fe->ops.get_frontend(fe, &e->parameters);
169
170 events->eventw = wp;
171
172 mutex_unlock(&events->mtx);
173
174 e->status = status;
175
176 wake_up_interruptible (&events->wait_queue);
177 }
178
179 static int dvb_frontend_get_event(struct dvb_frontend *fe,
180 struct dvb_frontend_event *event, int flags)
181 {
182 struct dvb_frontend_private *fepriv = fe->frontend_priv;
183 struct dvb_fe_events *events = &fepriv->events;
184
185 dprintk ("%s\n", __func__);
186
187 if (events->overflow) {
188 events->overflow = 0;
189 return -EOVERFLOW;
190 }
191
192 if (events->eventw == events->eventr) {
193 int ret;
194
195 if (flags & O_NONBLOCK)
196 return -EWOULDBLOCK;
197
198 up(&fepriv->sem);
199
200 ret = wait_event_interruptible (events->wait_queue,
201 events->eventw != events->eventr);
202
203 if (down_interruptible (&fepriv->sem))
204 return -ERESTARTSYS;
205
206 if (ret < 0)
207 return ret;
208 }
209
210 if (mutex_lock_interruptible (&events->mtx))
211 return -ERESTARTSYS;
212
213 memcpy (event, &events->events[events->eventr],
214 sizeof(struct dvb_frontend_event));
215
216 events->eventr = (events->eventr + 1) % MAX_EVENT;
217
218 mutex_unlock(&events->mtx);
219
220 return 0;
221 }
222
223 static void dvb_frontend_init(struct dvb_frontend *fe)
224 {
225 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
226 fe->dvb->num,
227 fe->id,
228 fe->ops.info.name);
229
230 if (fe->ops.init)
231 fe->ops.init(fe);
232 if (fe->ops.tuner_ops.init) {
233 if (fe->ops.i2c_gate_ctrl)
234 fe->ops.i2c_gate_ctrl(fe, 1);
235 fe->ops.tuner_ops.init(fe);
236 if (fe->ops.i2c_gate_ctrl)
237 fe->ops.i2c_gate_ctrl(fe, 0);
238 }
239 }
240
241 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
242 {
243 struct dvb_frontend_private *fepriv = fe->frontend_priv;
244
245 fepriv->reinitialise = 1;
246 dvb_frontend_wakeup(fe);
247 }
248 EXPORT_SYMBOL(dvb_frontend_reinitialise);
249
250 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
251 {
252 int q2;
253
254 dprintk ("%s\n", __func__);
255
256 if (locked)
257 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
258 else
259 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
260
261 q2 = fepriv->quality - 128;
262 q2 *= q2;
263
264 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
265 }
266
267 /**
268 * Performs automatic twiddling of frontend parameters.
269 *
270 * @param fe The frontend concerned.
271 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
272 * @returns Number of complete iterations that have been performed.
273 */
274 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
275 {
276 int autoinversion;
277 int ready = 0;
278 int fe_set_err = 0;
279 struct dvb_frontend_private *fepriv = fe->frontend_priv;
280 int original_inversion = fepriv->parameters.inversion;
281 u32 original_frequency = fepriv->parameters.frequency;
282
283 /* are we using autoinversion? */
284 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
285 (fepriv->parameters.inversion == INVERSION_AUTO));
286
287 /* setup parameters correctly */
288 while(!ready) {
289 /* calculate the lnb_drift */
290 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
291
292 /* wrap the auto_step if we've exceeded the maximum drift */
293 if (fepriv->lnb_drift > fepriv->max_drift) {
294 fepriv->auto_step = 0;
295 fepriv->auto_sub_step = 0;
296 fepriv->lnb_drift = 0;
297 }
298
299 /* perform inversion and +/- zigzag */
300 switch(fepriv->auto_sub_step) {
301 case 0:
302 /* try with the current inversion and current drift setting */
303 ready = 1;
304 break;
305
306 case 1:
307 if (!autoinversion) break;
308
309 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
310 ready = 1;
311 break;
312
313 case 2:
314 if (fepriv->lnb_drift == 0) break;
315
316 fepriv->lnb_drift = -fepriv->lnb_drift;
317 ready = 1;
318 break;
319
320 case 3:
321 if (fepriv->lnb_drift == 0) break;
322 if (!autoinversion) break;
323
324 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
325 fepriv->lnb_drift = -fepriv->lnb_drift;
326 ready = 1;
327 break;
328
329 default:
330 fepriv->auto_step++;
331 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
332 break;
333 }
334
335 if (!ready) fepriv->auto_sub_step++;
336 }
337
338 /* if this attempt would hit where we started, indicate a complete
339 * iteration has occurred */
340 if ((fepriv->auto_step == fepriv->started_auto_step) &&
341 (fepriv->auto_sub_step == 0) && check_wrapped) {
342 return 1;
343 }
344
345 dprintk("%s: drift:%i inversion:%i auto_step:%i "
346 "auto_sub_step:%i started_auto_step:%i\n",
347 __func__, fepriv->lnb_drift, fepriv->inversion,
348 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
349
350 /* set the frontend itself */
351 fepriv->parameters.frequency += fepriv->lnb_drift;
352 if (autoinversion)
353 fepriv->parameters.inversion = fepriv->inversion;
354 if (fe->ops.set_frontend)
355 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
356 if (fe_set_err < 0) {
357 fepriv->state = FESTATE_ERROR;
358 return fe_set_err;
359 }
360
361 fepriv->parameters.frequency = original_frequency;
362 fepriv->parameters.inversion = original_inversion;
363
364 fepriv->auto_sub_step++;
365 return 0;
366 }
367
368 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
369 {
370 fe_status_t s = 0;
371 int retval = 0;
372 struct dvb_frontend_private *fepriv = fe->frontend_priv;
373
374 /* if we've got no parameters, just keep idling */
375 if (fepriv->state & FESTATE_IDLE) {
376 fepriv->delay = 3*HZ;
377 fepriv->quality = 0;
378 return;
379 }
380
381 /* in SCAN mode, we just set the frontend when asked and leave it alone */
382 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
383 if (fepriv->state & FESTATE_RETUNE) {
384 if (fe->ops.set_frontend)
385 retval = fe->ops.set_frontend(fe,
386 &fepriv->parameters);
387 if (retval < 0)
388 fepriv->state = FESTATE_ERROR;
389 else
390 fepriv->state = FESTATE_TUNED;
391 }
392 fepriv->delay = 3*HZ;
393 fepriv->quality = 0;
394 return;
395 }
396
397 /* get the frontend status */
398 if (fepriv->state & FESTATE_RETUNE) {
399 s = 0;
400 } else {
401 if (fe->ops.read_status)
402 fe->ops.read_status(fe, &s);
403 if (s != fepriv->status) {
404 dvb_frontend_add_event(fe, s);
405 fepriv->status = s;
406 }
407 }
408
409 /* if we're not tuned, and we have a lock, move to the TUNED state */
410 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
411 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
412 fepriv->state = FESTATE_TUNED;
413
414 /* if we're tuned, then we have determined the correct inversion */
415 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
416 (fepriv->parameters.inversion == INVERSION_AUTO)) {
417 fepriv->parameters.inversion = fepriv->inversion;
418 }
419 return;
420 }
421
422 /* if we are tuned already, check we're still locked */
423 if (fepriv->state & FESTATE_TUNED) {
424 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
425
426 /* we're tuned, and the lock is still good... */
427 if (s & FE_HAS_LOCK) {
428 return;
429 } else { /* if we _WERE_ tuned, but now don't have a lock */
430 fepriv->state = FESTATE_ZIGZAG_FAST;
431 fepriv->started_auto_step = fepriv->auto_step;
432 fepriv->check_wrapped = 0;
433 }
434 }
435
436 /* don't actually do anything if we're in the LOSTLOCK state,
437 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
438 if ((fepriv->state & FESTATE_LOSTLOCK) &&
439 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
440 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
441 return;
442 }
443
444 /* don't do anything if we're in the DISEQC state, since this
445 * might be someone with a motorized dish controlled by DISEQC.
446 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
447 if (fepriv->state & FESTATE_DISEQC) {
448 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
449 return;
450 }
451
452 /* if we're in the RETUNE state, set everything up for a brand
453 * new scan, keeping the current inversion setting, as the next
454 * tune is _very_ likely to require the same */
455 if (fepriv->state & FESTATE_RETUNE) {
456 fepriv->lnb_drift = 0;
457 fepriv->auto_step = 0;
458 fepriv->auto_sub_step = 0;
459 fepriv->started_auto_step = 0;
460 fepriv->check_wrapped = 0;
461 }
462
463 /* fast zigzag. */
464 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
465 fepriv->delay = fepriv->min_delay;
466
467 /* perform a tune */
468 retval = dvb_frontend_swzigzag_autotune(fe,
469 fepriv->check_wrapped);
470 if (retval < 0) {
471 return;
472 } else if (retval) {
473 /* OK, if we've run out of trials at the fast speed.
474 * Drop back to slow for the _next_ attempt */
475 fepriv->state = FESTATE_SEARCHING_SLOW;
476 fepriv->started_auto_step = fepriv->auto_step;
477 return;
478 }
479 fepriv->check_wrapped = 1;
480
481 /* if we've just retuned, enter the ZIGZAG_FAST state.
482 * This ensures we cannot return from an
483 * FE_SET_FRONTEND ioctl before the first frontend tune
484 * occurs */
485 if (fepriv->state & FESTATE_RETUNE) {
486 fepriv->state = FESTATE_TUNING_FAST;
487 }
488 }
489
490 /* slow zigzag */
491 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
492 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
493
494 /* Note: don't bother checking for wrapping; we stay in this
495 * state until we get a lock */
496 dvb_frontend_swzigzag_autotune(fe, 0);
497 }
498 }
499
500 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
501 {
502 struct dvb_frontend_private *fepriv = fe->frontend_priv;
503
504 if (fepriv->exit != DVB_FE_NO_EXIT)
505 return 1;
506
507 if (fepriv->dvbdev->writers == 1)
508 if (time_after(jiffies, fepriv->release_jiffies +
509 dvb_shutdown_timeout * HZ))
510 return 1;
511
512 return 0;
513 }
514
515 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
516 {
517 struct dvb_frontend_private *fepriv = fe->frontend_priv;
518
519 if (fepriv->wakeup) {
520 fepriv->wakeup = 0;
521 return 1;
522 }
523 return dvb_frontend_is_exiting(fe);
524 }
525
526 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
527 {
528 struct dvb_frontend_private *fepriv = fe->frontend_priv;
529
530 fepriv->wakeup = 1;
531 wake_up_interruptible(&fepriv->wait_queue);
532 }
533
534 static int dvb_frontend_thread(void *data)
535 {
536 struct dvb_frontend *fe = data;
537 struct dvb_frontend_private *fepriv = fe->frontend_priv;
538 unsigned long timeout;
539 fe_status_t s;
540 enum dvbfe_algo algo;
541
542 struct dvb_frontend_parameters *params;
543
544 dprintk("%s\n", __func__);
545
546 fepriv->check_wrapped = 0;
547 fepriv->quality = 0;
548 fepriv->delay = 3*HZ;
549 fepriv->status = 0;
550 fepriv->wakeup = 0;
551 fepriv->reinitialise = 0;
552
553 dvb_frontend_init(fe);
554
555 set_freezable();
556 while (1) {
557 up(&fepriv->sem); /* is locked when we enter the thread... */
558 restart:
559 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
560 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
561 || freezing(current),
562 fepriv->delay);
563
564 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
565 /* got signal or quitting */
566 fepriv->exit = DVB_FE_NORMAL_EXIT;
567 break;
568 }
569
570 if (try_to_freeze())
571 goto restart;
572
573 if (down_interruptible(&fepriv->sem))
574 break;
575
576 if (fepriv->reinitialise) {
577 dvb_frontend_init(fe);
578 if (fepriv->tone != -1) {
579 fe->ops.set_tone(fe, fepriv->tone);
580 }
581 if (fepriv->voltage != -1) {
582 fe->ops.set_voltage(fe, fepriv->voltage);
583 }
584 fepriv->reinitialise = 0;
585 }
586
587 /* do an iteration of the tuning loop */
588 if (fe->ops.get_frontend_algo) {
589 algo = fe->ops.get_frontend_algo(fe);
590 switch (algo) {
591 case DVBFE_ALGO_HW:
592 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
593 params = NULL; /* have we been asked to RETUNE ? */
594
595 if (fepriv->state & FESTATE_RETUNE) {
596 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
597 params = &fepriv->parameters;
598 fepriv->state = FESTATE_TUNED;
599 }
600
601 if (fe->ops.tune)
602 fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
603
604 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
605 dprintk("%s: state changed, adding current state\n", __func__);
606 dvb_frontend_add_event(fe, s);
607 fepriv->status = s;
608 }
609 break;
610 case DVBFE_ALGO_SW:
611 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
612 dvb_frontend_swzigzag(fe);
613 break;
614 case DVBFE_ALGO_CUSTOM:
615 params = NULL; /* have we been asked to RETUNE ? */
616 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
617 if (fepriv->state & FESTATE_RETUNE) {
618 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
619 params = &fepriv->parameters;
620 fepriv->state = FESTATE_TUNED;
621 }
622 /* Case where we are going to search for a carrier
623 * User asked us to retune again for some reason, possibly
624 * requesting a search with a new set of parameters
625 */
626 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
627 if (fe->ops.search) {
628 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
629 /* We did do a search as was requested, the flags are
630 * now unset as well and has the flags wrt to search.
631 */
632 } else {
633 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
634 }
635 }
636 /* Track the carrier if the search was successful */
637 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
638 if (fe->ops.track)
639 fe->ops.track(fe, &fepriv->parameters);
640 } else {
641 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
642 fepriv->delay = HZ / 2;
643 }
644 fe->ops.read_status(fe, &s);
645 if (s != fepriv->status) {
646 dvb_frontend_add_event(fe, s); /* update event list */
647 fepriv->status = s;
648 if (!(s & FE_HAS_LOCK)) {
649 fepriv->delay = HZ / 10;
650 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
651 } else {
652 fepriv->delay = 60 * HZ;
653 }
654 }
655 break;
656 default:
657 dprintk("%s: UNDEFINED ALGO !\n", __func__);
658 break;
659 }
660 } else {
661 dvb_frontend_swzigzag(fe);
662 }
663 }
664
665 if (dvb_powerdown_on_sleep) {
666 if (fe->ops.set_voltage)
667 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
668 if (fe->ops.tuner_ops.sleep) {
669 if (fe->ops.i2c_gate_ctrl)
670 fe->ops.i2c_gate_ctrl(fe, 1);
671 fe->ops.tuner_ops.sleep(fe);
672 if (fe->ops.i2c_gate_ctrl)
673 fe->ops.i2c_gate_ctrl(fe, 0);
674 }
675 if (fe->ops.sleep)
676 fe->ops.sleep(fe);
677 }
678
679 fepriv->thread = NULL;
680 if (kthread_should_stop())
681 fepriv->exit = DVB_FE_DEVICE_REMOVED;
682 else
683 fepriv->exit = DVB_FE_NO_EXIT;
684 mb();
685
686 dvb_frontend_wakeup(fe);
687 return 0;
688 }
689
690 static void dvb_frontend_stop(struct dvb_frontend *fe)
691 {
692 struct dvb_frontend_private *fepriv = fe->frontend_priv;
693
694 dprintk ("%s\n", __func__);
695
696 fepriv->exit = DVB_FE_NORMAL_EXIT;
697 mb();
698
699 if (!fepriv->thread)
700 return;
701
702 kthread_stop(fepriv->thread);
703
704 sema_init(&fepriv->sem, 1);
705 fepriv->state = FESTATE_IDLE;
706
707 /* paranoia check in case a signal arrived */
708 if (fepriv->thread)
709 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
710 fepriv->thread);
711 }
712
713 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
714 {
715 return ((curtime.tv_usec < lasttime.tv_usec) ?
716 1000000 - lasttime.tv_usec + curtime.tv_usec :
717 curtime.tv_usec - lasttime.tv_usec);
718 }
719 EXPORT_SYMBOL(timeval_usec_diff);
720
721 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
722 {
723 curtime->tv_usec += add_usec;
724 if (curtime->tv_usec >= 1000000) {
725 curtime->tv_usec -= 1000000;
726 curtime->tv_sec++;
727 }
728 }
729
730 /*
731 * Sleep until gettimeofday() > waketime + add_usec
732 * This needs to be as precise as possible, but as the delay is
733 * usually between 2ms and 32ms, it is done using a scheduled msleep
734 * followed by usleep (normally a busy-wait loop) for the remainder
735 */
736 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
737 {
738 struct timeval lasttime;
739 s32 delta, newdelta;
740
741 timeval_usec_add(waketime, add_usec);
742
743 do_gettimeofday(&lasttime);
744 delta = timeval_usec_diff(lasttime, *waketime);
745 if (delta > 2500) {
746 msleep((delta - 1500) / 1000);
747 do_gettimeofday(&lasttime);
748 newdelta = timeval_usec_diff(lasttime, *waketime);
749 delta = (newdelta > delta) ? 0 : newdelta;
750 }
751 if (delta > 0)
752 udelay(delta);
753 }
754 EXPORT_SYMBOL(dvb_frontend_sleep_until);
755
756 static int dvb_frontend_start(struct dvb_frontend *fe)
757 {
758 int ret;
759 struct dvb_frontend_private *fepriv = fe->frontend_priv;
760 struct task_struct *fe_thread;
761
762 dprintk ("%s\n", __func__);
763
764 if (fepriv->thread) {
765 if (fepriv->exit == DVB_FE_NO_EXIT)
766 return 0;
767 else
768 dvb_frontend_stop (fe);
769 }
770
771 if (signal_pending(current))
772 return -EINTR;
773 if (down_interruptible (&fepriv->sem))
774 return -EINTR;
775
776 fepriv->state = FESTATE_IDLE;
777 fepriv->exit = DVB_FE_NO_EXIT;
778 fepriv->thread = NULL;
779 mb();
780
781 fe_thread = kthread_run(dvb_frontend_thread, fe,
782 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
783 if (IS_ERR(fe_thread)) {
784 ret = PTR_ERR(fe_thread);
785 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
786 up(&fepriv->sem);
787 return ret;
788 }
789 fepriv->thread = fe_thread;
790 return 0;
791 }
792
793 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
794 u32 *freq_min, u32 *freq_max)
795 {
796 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
797
798 if (fe->ops.info.frequency_max == 0)
799 *freq_max = fe->ops.tuner_ops.info.frequency_max;
800 else if (fe->ops.tuner_ops.info.frequency_max == 0)
801 *freq_max = fe->ops.info.frequency_max;
802 else
803 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
804
805 if (*freq_min == 0 || *freq_max == 0)
806 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
807 fe->dvb->num,fe->id);
808 }
809
810 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
811 struct dvb_frontend_parameters *parms)
812 {
813 u32 freq_min;
814 u32 freq_max;
815
816 /* range check: frequency */
817 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
818 if ((freq_min && parms->frequency < freq_min) ||
819 (freq_max && parms->frequency > freq_max)) {
820 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
821 fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
822 return -EINVAL;
823 }
824
825 /* range check: symbol rate */
826 if (fe->ops.info.type == FE_QPSK) {
827 if ((fe->ops.info.symbol_rate_min &&
828 parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
829 (fe->ops.info.symbol_rate_max &&
830 parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
831 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
832 fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
833 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
834 return -EINVAL;
835 }
836
837 } else if (fe->ops.info.type == FE_QAM) {
838 if ((fe->ops.info.symbol_rate_min &&
839 parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
840 (fe->ops.info.symbol_rate_max &&
841 parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
842 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
843 fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
844 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
845 return -EINVAL;
846 }
847 }
848
849 /* check for supported modulation */
850 if (fe->ops.info.type == FE_QAM &&
851 (parms->u.qam.modulation > QAM_AUTO ||
852 !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
853 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
854 fe->dvb->num, fe->id, parms->u.qam.modulation);
855 return -EINVAL;
856 }
857
858 return 0;
859 }
860
861 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
862 {
863 int i;
864
865 memset(&(fe->dtv_property_cache), 0,
866 sizeof(struct dtv_frontend_properties));
867
868 fe->dtv_property_cache.state = DTV_CLEAR;
869 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
870 fe->dtv_property_cache.inversion = INVERSION_AUTO;
871 fe->dtv_property_cache.fec_inner = FEC_AUTO;
872 fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO;
873 fe->dtv_property_cache.bandwidth_hz = BANDWIDTH_AUTO;
874 fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO;
875 fe->dtv_property_cache.hierarchy = HIERARCHY_AUTO;
876 fe->dtv_property_cache.symbol_rate = QAM_AUTO;
877 fe->dtv_property_cache.code_rate_HP = FEC_AUTO;
878 fe->dtv_property_cache.code_rate_LP = FEC_AUTO;
879
880 fe->dtv_property_cache.isdbt_partial_reception = -1;
881 fe->dtv_property_cache.isdbt_sb_mode = -1;
882 fe->dtv_property_cache.isdbt_sb_subchannel = -1;
883 fe->dtv_property_cache.isdbt_sb_segment_idx = -1;
884 fe->dtv_property_cache.isdbt_sb_segment_count = -1;
885 fe->dtv_property_cache.isdbt_layer_enabled = 0x7;
886 for (i = 0; i < 3; i++) {
887 fe->dtv_property_cache.layer[i].fec = FEC_AUTO;
888 fe->dtv_property_cache.layer[i].modulation = QAM_AUTO;
889 fe->dtv_property_cache.layer[i].interleaving = -1;
890 fe->dtv_property_cache.layer[i].segment_count = -1;
891 }
892
893 return 0;
894 }
895
896 #define _DTV_CMD(n, s, b) \
897 [n] = { \
898 .name = #n, \
899 .cmd = n, \
900 .set = s,\
901 .buffer = b \
902 }
903
904 static struct dtv_cmds_h dtv_cmds[] = {
905 _DTV_CMD(DTV_TUNE, 1, 0),
906 _DTV_CMD(DTV_CLEAR, 1, 0),
907
908 /* Set */
909 _DTV_CMD(DTV_FREQUENCY, 1, 0),
910 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
911 _DTV_CMD(DTV_MODULATION, 1, 0),
912 _DTV_CMD(DTV_INVERSION, 1, 0),
913 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
914 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
915 _DTV_CMD(DTV_INNER_FEC, 1, 0),
916 _DTV_CMD(DTV_VOLTAGE, 1, 0),
917 _DTV_CMD(DTV_TONE, 1, 0),
918 _DTV_CMD(DTV_PILOT, 1, 0),
919 _DTV_CMD(DTV_ROLLOFF, 1, 0),
920 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
921 _DTV_CMD(DTV_HIERARCHY, 1, 0),
922 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
923 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
924 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
925 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
926
927 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
928 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
929 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
930 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
931 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
932 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
933 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
934 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
935 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
936 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
937 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
938 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
939 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
940 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
941 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
942 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
943 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
944 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
945
946 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
947 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
948 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
949 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
950 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
951 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
952 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
953 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
954 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
955 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
956 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
957 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
958 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
959 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
960 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
961 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
962 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
963 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
964
965 _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
966
967 /* Get */
968 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
969 _DTV_CMD(DTV_API_VERSION, 0, 0),
970 _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
971 _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
972 _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
973 _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
974 _DTV_CMD(DTV_HIERARCHY, 0, 0),
975 };
976
977 static void dtv_property_dump(struct dtv_property *tvp)
978 {
979 int i;
980
981 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
982 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
983 __func__, tvp->cmd);
984 return;
985 }
986
987 dprintk("%s() tvp.cmd = 0x%08x (%s)\n"
988 ,__func__
989 ,tvp->cmd
990 ,dtv_cmds[ tvp->cmd ].name);
991
992 if(dtv_cmds[ tvp->cmd ].buffer) {
993
994 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
995 ,__func__
996 ,tvp->u.buffer.len);
997
998 for(i = 0; i < tvp->u.buffer.len; i++)
999 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1000 ,__func__
1001 ,i
1002 ,tvp->u.buffer.data[i]);
1003
1004 } else
1005 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1006 }
1007
1008 static int is_legacy_delivery_system(fe_delivery_system_t s)
1009 {
1010 if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1011 (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1012 (s == SYS_ATSC))
1013 return 1;
1014
1015 return 0;
1016 }
1017
1018 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1019 * drivers can use a single set_frontend tuning function, regardless of whether
1020 * it's being used for the legacy or new API, reducing code and complexity.
1021 */
1022 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1023 struct dvb_frontend_parameters *p)
1024 {
1025 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1026
1027 c->frequency = p->frequency;
1028 c->inversion = p->inversion;
1029
1030 switch (fe->ops.info.type) {
1031 case FE_QPSK:
1032 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1033 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1034 c->symbol_rate = p->u.qpsk.symbol_rate;
1035 c->fec_inner = p->u.qpsk.fec_inner;
1036 c->delivery_system = SYS_DVBS;
1037 break;
1038 case FE_QAM:
1039 c->symbol_rate = p->u.qam.symbol_rate;
1040 c->fec_inner = p->u.qam.fec_inner;
1041 c->modulation = p->u.qam.modulation;
1042 c->delivery_system = SYS_DVBC_ANNEX_AC;
1043 break;
1044 case FE_OFDM:
1045 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1046 c->bandwidth_hz = 6000000;
1047 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1048 c->bandwidth_hz = 7000000;
1049 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1050 c->bandwidth_hz = 8000000;
1051 else
1052 /* Including BANDWIDTH_AUTO */
1053 c->bandwidth_hz = 0;
1054 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1055 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1056 c->modulation = p->u.ofdm.constellation;
1057 c->transmission_mode = p->u.ofdm.transmission_mode;
1058 c->guard_interval = p->u.ofdm.guard_interval;
1059 c->hierarchy = p->u.ofdm.hierarchy_information;
1060 c->delivery_system = SYS_DVBT;
1061 break;
1062 case FE_ATSC:
1063 c->modulation = p->u.vsb.modulation;
1064 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1065 c->delivery_system = SYS_ATSC;
1066 else
1067 c->delivery_system = SYS_DVBC_ANNEX_B;
1068 break;
1069 }
1070 }
1071
1072 /* Ensure the cached values are set correctly in the frontend
1073 * legacy tuning structures, for the advanced tuning API.
1074 */
1075 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1076 {
1077 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1078 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1079 struct dvb_frontend_parameters *p = &fepriv->parameters;
1080
1081 p->frequency = c->frequency;
1082 p->inversion = c->inversion;
1083
1084 switch (fe->ops.info.type) {
1085 case FE_QPSK:
1086 dprintk("%s() Preparing QPSK req\n", __func__);
1087 p->u.qpsk.symbol_rate = c->symbol_rate;
1088 p->u.qpsk.fec_inner = c->fec_inner;
1089 c->delivery_system = SYS_DVBS;
1090 break;
1091 case FE_QAM:
1092 dprintk("%s() Preparing QAM req\n", __func__);
1093 p->u.qam.symbol_rate = c->symbol_rate;
1094 p->u.qam.fec_inner = c->fec_inner;
1095 p->u.qam.modulation = c->modulation;
1096 c->delivery_system = SYS_DVBC_ANNEX_AC;
1097 break;
1098 case FE_OFDM:
1099 dprintk("%s() Preparing OFDM req\n", __func__);
1100 if (c->bandwidth_hz == 6000000)
1101 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1102 else if (c->bandwidth_hz == 7000000)
1103 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1104 else if (c->bandwidth_hz == 8000000)
1105 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1106 else
1107 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1108 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1109 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1110 p->u.ofdm.constellation = c->modulation;
1111 p->u.ofdm.transmission_mode = c->transmission_mode;
1112 p->u.ofdm.guard_interval = c->guard_interval;
1113 p->u.ofdm.hierarchy_information = c->hierarchy;
1114 c->delivery_system = SYS_DVBT;
1115 break;
1116 case FE_ATSC:
1117 dprintk("%s() Preparing VSB req\n", __func__);
1118 p->u.vsb.modulation = c->modulation;
1119 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1120 c->delivery_system = SYS_ATSC;
1121 else
1122 c->delivery_system = SYS_DVBC_ANNEX_B;
1123 break;
1124 }
1125 }
1126
1127 /* Ensure the cached values are set correctly in the frontend
1128 * legacy tuning structures, for the legacy tuning API.
1129 */
1130 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1131 {
1132 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1133 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1134 struct dvb_frontend_parameters *p = &fepriv->parameters;
1135
1136 p->frequency = c->frequency;
1137 p->inversion = c->inversion;
1138
1139 switch(c->modulation) {
1140 case PSK_8:
1141 case APSK_16:
1142 case APSK_32:
1143 case QPSK:
1144 p->u.qpsk.symbol_rate = c->symbol_rate;
1145 p->u.qpsk.fec_inner = c->fec_inner;
1146 break;
1147 default:
1148 break;
1149 }
1150
1151 if(c->delivery_system == SYS_ISDBT) {
1152 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1153 p->frequency = c->frequency;
1154 p->inversion = c->inversion;
1155 p->u.ofdm.constellation = QAM_AUTO;
1156 p->u.ofdm.code_rate_HP = FEC_AUTO;
1157 p->u.ofdm.code_rate_LP = FEC_AUTO;
1158 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1159 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1160 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1161 if (c->bandwidth_hz == 8000000)
1162 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1163 else if (c->bandwidth_hz == 7000000)
1164 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1165 else if (c->bandwidth_hz == 6000000)
1166 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1167 else
1168 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1169 }
1170 }
1171
1172 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1173 {
1174 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1175
1176 /* For legacy delivery systems we don't need the delivery_system to
1177 * be specified, but we populate the older structures from the cache
1178 * so we can call set_frontend on older drivers.
1179 */
1180 if(is_legacy_delivery_system(c->delivery_system)) {
1181
1182 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1183 dtv_property_legacy_params_sync(fe);
1184
1185 } else {
1186 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1187
1188 /* For advanced delivery systems / modulation types ...
1189 * we seed the lecacy dvb_frontend_parameters structure
1190 * so that the sanity checking code later in the IOCTL processing
1191 * can validate our basic frequency ranges, symbolrates, modulation
1192 * etc.
1193 */
1194 dtv_property_adv_params_sync(fe);
1195 }
1196 }
1197
1198 static int dvb_frontend_ioctl_legacy(struct file *file,
1199 unsigned int cmd, void *parg);
1200 static int dvb_frontend_ioctl_properties(struct file *file,
1201 unsigned int cmd, void *parg);
1202
1203 static int dtv_property_process_get(struct dvb_frontend *fe,
1204 struct dtv_property *tvp,
1205 struct file *file)
1206 {
1207 int r = 0;
1208
1209 /* Allow the frontend to validate incoming properties */
1210 if (fe->ops.get_property)
1211 r = fe->ops.get_property(fe, tvp);
1212
1213 if (r < 0)
1214 return r;
1215
1216 switch(tvp->cmd) {
1217 case DTV_FREQUENCY:
1218 tvp->u.data = fe->dtv_property_cache.frequency;
1219 break;
1220 case DTV_MODULATION:
1221 tvp->u.data = fe->dtv_property_cache.modulation;
1222 break;
1223 case DTV_BANDWIDTH_HZ:
1224 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1225 break;
1226 case DTV_INVERSION:
1227 tvp->u.data = fe->dtv_property_cache.inversion;
1228 break;
1229 case DTV_SYMBOL_RATE:
1230 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1231 break;
1232 case DTV_INNER_FEC:
1233 tvp->u.data = fe->dtv_property_cache.fec_inner;
1234 break;
1235 case DTV_PILOT:
1236 tvp->u.data = fe->dtv_property_cache.pilot;
1237 break;
1238 case DTV_ROLLOFF:
1239 tvp->u.data = fe->dtv_property_cache.rolloff;
1240 break;
1241 case DTV_DELIVERY_SYSTEM:
1242 tvp->u.data = fe->dtv_property_cache.delivery_system;
1243 break;
1244 case DTV_VOLTAGE:
1245 tvp->u.data = fe->dtv_property_cache.voltage;
1246 break;
1247 case DTV_TONE:
1248 tvp->u.data = fe->dtv_property_cache.sectone;
1249 break;
1250 case DTV_API_VERSION:
1251 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1252 break;
1253 case DTV_CODE_RATE_HP:
1254 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1255 break;
1256 case DTV_CODE_RATE_LP:
1257 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1258 break;
1259 case DTV_GUARD_INTERVAL:
1260 tvp->u.data = fe->dtv_property_cache.guard_interval;
1261 break;
1262 case DTV_TRANSMISSION_MODE:
1263 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1264 break;
1265 case DTV_HIERARCHY:
1266 tvp->u.data = fe->dtv_property_cache.hierarchy;
1267 break;
1268
1269 /* ISDB-T Support here */
1270 case DTV_ISDBT_PARTIAL_RECEPTION:
1271 tvp->u.data = fe->dtv_property_cache.isdbt_partial_reception;
1272 break;
1273 case DTV_ISDBT_SOUND_BROADCASTING:
1274 tvp->u.data = fe->dtv_property_cache.isdbt_sb_mode;
1275 break;
1276 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1277 tvp->u.data = fe->dtv_property_cache.isdbt_sb_subchannel;
1278 break;
1279 case DTV_ISDBT_SB_SEGMENT_IDX:
1280 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_idx;
1281 break;
1282 case DTV_ISDBT_SB_SEGMENT_COUNT:
1283 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_count;
1284 break;
1285 case DTV_ISDBT_LAYER_ENABLED:
1286 tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled;
1287 break;
1288 case DTV_ISDBT_LAYERA_FEC:
1289 tvp->u.data = fe->dtv_property_cache.layer[0].fec;
1290 break;
1291 case DTV_ISDBT_LAYERA_MODULATION:
1292 tvp->u.data = fe->dtv_property_cache.layer[0].modulation;
1293 break;
1294 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1295 tvp->u.data = fe->dtv_property_cache.layer[0].segment_count;
1296 break;
1297 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1298 tvp->u.data = fe->dtv_property_cache.layer[0].interleaving;
1299 break;
1300 case DTV_ISDBT_LAYERB_FEC:
1301 tvp->u.data = fe->dtv_property_cache.layer[1].fec;
1302 break;
1303 case DTV_ISDBT_LAYERB_MODULATION:
1304 tvp->u.data = fe->dtv_property_cache.layer[1].modulation;
1305 break;
1306 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1307 tvp->u.data = fe->dtv_property_cache.layer[1].segment_count;
1308 break;
1309 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1310 tvp->u.data = fe->dtv_property_cache.layer[1].interleaving;
1311 break;
1312 case DTV_ISDBT_LAYERC_FEC:
1313 tvp->u.data = fe->dtv_property_cache.layer[2].fec;
1314 break;
1315 case DTV_ISDBT_LAYERC_MODULATION:
1316 tvp->u.data = fe->dtv_property_cache.layer[2].modulation;
1317 break;
1318 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1319 tvp->u.data = fe->dtv_property_cache.layer[2].segment_count;
1320 break;
1321 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1322 tvp->u.data = fe->dtv_property_cache.layer[2].interleaving;
1323 break;
1324 case DTV_ISDBS_TS_ID:
1325 tvp->u.data = fe->dtv_property_cache.isdbs_ts_id;
1326 break;
1327 default:
1328 r = -1;
1329 }
1330
1331 dtv_property_dump(tvp);
1332
1333 return r;
1334 }
1335
1336 static int dtv_property_process_set(struct dvb_frontend *fe,
1337 struct dtv_property *tvp,
1338 struct file *file)
1339 {
1340 int r = 0;
1341 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1342 dtv_property_dump(tvp);
1343
1344 /* Allow the frontend to validate incoming properties */
1345 if (fe->ops.set_property)
1346 r = fe->ops.set_property(fe, tvp);
1347
1348 if (r < 0)
1349 return r;
1350
1351 switch(tvp->cmd) {
1352 case DTV_CLEAR:
1353 /* Reset a cache of data specific to the frontend here. This does
1354 * not effect hardware.
1355 */
1356 dvb_frontend_clear_cache(fe);
1357 dprintk("%s() Flushing property cache\n", __func__);
1358 break;
1359 case DTV_TUNE:
1360 /* interpret the cache of data, build either a traditional frontend
1361 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1362 * ioctl.
1363 */
1364 fe->dtv_property_cache.state = tvp->cmd;
1365 dprintk("%s() Finalised property cache\n", __func__);
1366 dtv_property_cache_submit(fe);
1367
1368 r |= dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND,
1369 &fepriv->parameters);
1370 break;
1371 case DTV_FREQUENCY:
1372 fe->dtv_property_cache.frequency = tvp->u.data;
1373 break;
1374 case DTV_MODULATION:
1375 fe->dtv_property_cache.modulation = tvp->u.data;
1376 break;
1377 case DTV_BANDWIDTH_HZ:
1378 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1379 break;
1380 case DTV_INVERSION:
1381 fe->dtv_property_cache.inversion = tvp->u.data;
1382 break;
1383 case DTV_SYMBOL_RATE:
1384 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1385 break;
1386 case DTV_INNER_FEC:
1387 fe->dtv_property_cache.fec_inner = tvp->u.data;
1388 break;
1389 case DTV_PILOT:
1390 fe->dtv_property_cache.pilot = tvp->u.data;
1391 break;
1392 case DTV_ROLLOFF:
1393 fe->dtv_property_cache.rolloff = tvp->u.data;
1394 break;
1395 case DTV_DELIVERY_SYSTEM:
1396 fe->dtv_property_cache.delivery_system = tvp->u.data;
1397 break;
1398 case DTV_VOLTAGE:
1399 fe->dtv_property_cache.voltage = tvp->u.data;
1400 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1401 (void *)fe->dtv_property_cache.voltage);
1402 break;
1403 case DTV_TONE:
1404 fe->dtv_property_cache.sectone = tvp->u.data;
1405 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1406 (void *)fe->dtv_property_cache.sectone);
1407 break;
1408 case DTV_CODE_RATE_HP:
1409 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1410 break;
1411 case DTV_CODE_RATE_LP:
1412 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1413 break;
1414 case DTV_GUARD_INTERVAL:
1415 fe->dtv_property_cache.guard_interval = tvp->u.data;
1416 break;
1417 case DTV_TRANSMISSION_MODE:
1418 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1419 break;
1420 case DTV_HIERARCHY:
1421 fe->dtv_property_cache.hierarchy = tvp->u.data;
1422 break;
1423
1424 /* ISDB-T Support here */
1425 case DTV_ISDBT_PARTIAL_RECEPTION:
1426 fe->dtv_property_cache.isdbt_partial_reception = tvp->u.data;
1427 break;
1428 case DTV_ISDBT_SOUND_BROADCASTING:
1429 fe->dtv_property_cache.isdbt_sb_mode = tvp->u.data;
1430 break;
1431 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1432 fe->dtv_property_cache.isdbt_sb_subchannel = tvp->u.data;
1433 break;
1434 case DTV_ISDBT_SB_SEGMENT_IDX:
1435 fe->dtv_property_cache.isdbt_sb_segment_idx = tvp->u.data;
1436 break;
1437 case DTV_ISDBT_SB_SEGMENT_COUNT:
1438 fe->dtv_property_cache.isdbt_sb_segment_count = tvp->u.data;
1439 break;
1440 case DTV_ISDBT_LAYER_ENABLED:
1441 fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data;
1442 break;
1443 case DTV_ISDBT_LAYERA_FEC:
1444 fe->dtv_property_cache.layer[0].fec = tvp->u.data;
1445 break;
1446 case DTV_ISDBT_LAYERA_MODULATION:
1447 fe->dtv_property_cache.layer[0].modulation = tvp->u.data;
1448 break;
1449 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1450 fe->dtv_property_cache.layer[0].segment_count = tvp->u.data;
1451 break;
1452 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1453 fe->dtv_property_cache.layer[0].interleaving = tvp->u.data;
1454 break;
1455 case DTV_ISDBT_LAYERB_FEC:
1456 fe->dtv_property_cache.layer[1].fec = tvp->u.data;
1457 break;
1458 case DTV_ISDBT_LAYERB_MODULATION:
1459 fe->dtv_property_cache.layer[1].modulation = tvp->u.data;
1460 break;
1461 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1462 fe->dtv_property_cache.layer[1].segment_count = tvp->u.data;
1463 break;
1464 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1465 fe->dtv_property_cache.layer[1].interleaving = tvp->u.data;
1466 break;
1467 case DTV_ISDBT_LAYERC_FEC:
1468 fe->dtv_property_cache.layer[2].fec = tvp->u.data;
1469 break;
1470 case DTV_ISDBT_LAYERC_MODULATION:
1471 fe->dtv_property_cache.layer[2].modulation = tvp->u.data;
1472 break;
1473 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1474 fe->dtv_property_cache.layer[2].segment_count = tvp->u.data;
1475 break;
1476 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1477 fe->dtv_property_cache.layer[2].interleaving = tvp->u.data;
1478 break;
1479 case DTV_ISDBS_TS_ID:
1480 fe->dtv_property_cache.isdbs_ts_id = tvp->u.data;
1481 break;
1482 default:
1483 r = -1;
1484 }
1485
1486 return r;
1487 }
1488
1489 static int dvb_frontend_ioctl(struct file *file,
1490 unsigned int cmd, void *parg)
1491 {
1492 struct dvb_device *dvbdev = file->private_data;
1493 struct dvb_frontend *fe = dvbdev->priv;
1494 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1495 int err = -EOPNOTSUPP;
1496
1497 dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1498
1499 if (fepriv->exit != DVB_FE_NO_EXIT)
1500 return -ENODEV;
1501
1502 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1503 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1504 cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1505 return -EPERM;
1506
1507 if (down_interruptible (&fepriv->sem))
1508 return -ERESTARTSYS;
1509
1510 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1511 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1512 else {
1513 fe->dtv_property_cache.state = DTV_UNDEFINED;
1514 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1515 }
1516
1517 up(&fepriv->sem);
1518 return err;
1519 }
1520
1521 static int dvb_frontend_ioctl_properties(struct file *file,
1522 unsigned int cmd, void *parg)
1523 {
1524 struct dvb_device *dvbdev = file->private_data;
1525 struct dvb_frontend *fe = dvbdev->priv;
1526 int err = 0;
1527
1528 struct dtv_properties *tvps = NULL;
1529 struct dtv_property *tvp = NULL;
1530 int i;
1531
1532 dprintk("%s\n", __func__);
1533
1534 if(cmd == FE_SET_PROPERTY) {
1535 tvps = (struct dtv_properties __user *)parg;
1536
1537 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1538 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1539
1540 /* Put an arbitrary limit on the number of messages that can
1541 * be sent at once */
1542 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1543 return -EINVAL;
1544
1545 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1546 if (!tvp) {
1547 err = -ENOMEM;
1548 goto out;
1549 }
1550
1551 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1552 err = -EFAULT;
1553 goto out;
1554 }
1555
1556 for (i = 0; i < tvps->num; i++) {
1557 (tvp + i)->result = dtv_property_process_set(fe, tvp + i, file);
1558 err |= (tvp + i)->result;
1559 }
1560
1561 if(fe->dtv_property_cache.state == DTV_TUNE)
1562 dprintk("%s() Property cache is full, tuning\n", __func__);
1563
1564 } else
1565 if(cmd == FE_GET_PROPERTY) {
1566
1567 tvps = (struct dtv_properties __user *)parg;
1568
1569 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1570 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1571
1572 /* Put an arbitrary limit on the number of messages that can
1573 * be sent at once */
1574 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1575 return -EINVAL;
1576
1577 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1578 if (!tvp) {
1579 err = -ENOMEM;
1580 goto out;
1581 }
1582
1583 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1584 err = -EFAULT;
1585 goto out;
1586 }
1587
1588 for (i = 0; i < tvps->num; i++) {
1589 (tvp + i)->result = dtv_property_process_get(fe, tvp + i, file);
1590 err |= (tvp + i)->result;
1591 }
1592
1593 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1594 err = -EFAULT;
1595 goto out;
1596 }
1597
1598 } else
1599 err = -EOPNOTSUPP;
1600
1601 out:
1602 kfree(tvp);
1603 return err;
1604 }
1605
1606 static int dvb_frontend_ioctl_legacy(struct file *file,
1607 unsigned int cmd, void *parg)
1608 {
1609 struct dvb_device *dvbdev = file->private_data;
1610 struct dvb_frontend *fe = dvbdev->priv;
1611 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1612 int cb_err, err = -EOPNOTSUPP;
1613
1614 if (fe->dvb->fe_ioctl_override) {
1615 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1616 DVB_FE_IOCTL_PRE);
1617 if (cb_err < 0)
1618 return cb_err;
1619 if (cb_err > 0)
1620 return 0;
1621 /* fe_ioctl_override returning 0 allows
1622 * dvb-core to continue handling the ioctl */
1623 }
1624
1625 switch (cmd) {
1626 case FE_GET_INFO: {
1627 struct dvb_frontend_info* info = parg;
1628 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1629 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1630
1631 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1632 * do it, it is done for it. */
1633 info->caps |= FE_CAN_INVERSION_AUTO;
1634 err = 0;
1635 break;
1636 }
1637
1638 case FE_READ_STATUS: {
1639 fe_status_t* status = parg;
1640
1641 /* if retune was requested but hasn't occured yet, prevent
1642 * that user get signal state from previous tuning */
1643 if (fepriv->state == FESTATE_RETUNE ||
1644 fepriv->state == FESTATE_ERROR) {
1645 err=0;
1646 *status = 0;
1647 break;
1648 }
1649
1650 if (fe->ops.read_status)
1651 err = fe->ops.read_status(fe, status);
1652 break;
1653 }
1654 case FE_READ_BER:
1655 if (fe->ops.read_ber)
1656 err = fe->ops.read_ber(fe, (__u32*) parg);
1657 break;
1658
1659 case FE_READ_SIGNAL_STRENGTH:
1660 if (fe->ops.read_signal_strength)
1661 err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1662 break;
1663
1664 case FE_READ_SNR:
1665 if (fe->ops.read_snr)
1666 err = fe->ops.read_snr(fe, (__u16*) parg);
1667 break;
1668
1669 case FE_READ_UNCORRECTED_BLOCKS:
1670 if (fe->ops.read_ucblocks)
1671 err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1672 break;
1673
1674
1675 case FE_DISEQC_RESET_OVERLOAD:
1676 if (fe->ops.diseqc_reset_overload) {
1677 err = fe->ops.diseqc_reset_overload(fe);
1678 fepriv->state = FESTATE_DISEQC;
1679 fepriv->status = 0;
1680 }
1681 break;
1682
1683 case FE_DISEQC_SEND_MASTER_CMD:
1684 if (fe->ops.diseqc_send_master_cmd) {
1685 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1686 fepriv->state = FESTATE_DISEQC;
1687 fepriv->status = 0;
1688 }
1689 break;
1690
1691 case FE_DISEQC_SEND_BURST:
1692 if (fe->ops.diseqc_send_burst) {
1693 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1694 fepriv->state = FESTATE_DISEQC;
1695 fepriv->status = 0;
1696 }
1697 break;
1698
1699 case FE_SET_TONE:
1700 if (fe->ops.set_tone) {
1701 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1702 fepriv->tone = (fe_sec_tone_mode_t) parg;
1703 fepriv->state = FESTATE_DISEQC;
1704 fepriv->status = 0;
1705 }
1706 break;
1707
1708 case FE_SET_VOLTAGE:
1709 if (fe->ops.set_voltage) {
1710 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1711 fepriv->voltage = (fe_sec_voltage_t) parg;
1712 fepriv->state = FESTATE_DISEQC;
1713 fepriv->status = 0;
1714 }
1715 break;
1716
1717 case FE_DISHNETWORK_SEND_LEGACY_CMD:
1718 if (fe->ops.dishnetwork_send_legacy_command) {
1719 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1720 fepriv->state = FESTATE_DISEQC;
1721 fepriv->status = 0;
1722 } else if (fe->ops.set_voltage) {
1723 /*
1724 * NOTE: This is a fallback condition. Some frontends
1725 * (stv0299 for instance) take longer than 8msec to
1726 * respond to a set_voltage command. Those switches
1727 * need custom routines to switch properly. For all
1728 * other frontends, the following should work ok.
1729 * Dish network legacy switches (as used by Dish500)
1730 * are controlled by sending 9-bit command words
1731 * spaced 8msec apart.
1732 * the actual command word is switch/port dependant
1733 * so it is up to the userspace application to send
1734 * the right command.
1735 * The command must always start with a '0' after
1736 * initialization, so parg is 8 bits and does not
1737 * include the initialization or start bit
1738 */
1739 unsigned long swcmd = ((unsigned long) parg) << 1;
1740 struct timeval nexttime;
1741 struct timeval tv[10];
1742 int i;
1743 u8 last = 1;
1744 if (dvb_frontend_debug)
1745 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1746 do_gettimeofday(&nexttime);
1747 if (dvb_frontend_debug)
1748 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1749 /* before sending a command, initialize by sending
1750 * a 32ms 18V to the switch
1751 */
1752 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1753 dvb_frontend_sleep_until(&nexttime, 32000);
1754
1755 for (i = 0; i < 9; i++) {
1756 if (dvb_frontend_debug)
1757 do_gettimeofday(&tv[i + 1]);
1758 if ((swcmd & 0x01) != last) {
1759 /* set voltage to (last ? 13V : 18V) */
1760 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1761 last = (last) ? 0 : 1;
1762 }
1763 swcmd = swcmd >> 1;
1764 if (i != 8)
1765 dvb_frontend_sleep_until(&nexttime, 8000);
1766 }
1767 if (dvb_frontend_debug) {
1768 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1769 __func__, fe->dvb->num);
1770 for (i = 1; i < 10; i++)
1771 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1772 }
1773 err = 0;
1774 fepriv->state = FESTATE_DISEQC;
1775 fepriv->status = 0;
1776 }
1777 break;
1778
1779 case FE_DISEQC_RECV_SLAVE_REPLY:
1780 if (fe->ops.diseqc_recv_slave_reply)
1781 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1782 break;
1783
1784 case FE_ENABLE_HIGH_LNB_VOLTAGE:
1785 if (fe->ops.enable_high_lnb_voltage)
1786 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1787 break;
1788
1789 case FE_SET_FRONTEND: {
1790 struct dvb_frontend_tune_settings fetunesettings;
1791
1792 if(fe->dtv_property_cache.state == DTV_TUNE) {
1793 if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1794 err = -EINVAL;
1795 break;
1796 }
1797 } else {
1798 if (dvb_frontend_check_parameters(fe, parg) < 0) {
1799 err = -EINVAL;
1800 break;
1801 }
1802
1803 memcpy (&fepriv->parameters, parg,
1804 sizeof (struct dvb_frontend_parameters));
1805 dtv_property_cache_sync(fe, &fepriv->parameters);
1806 }
1807
1808 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1809 memcpy(&fetunesettings.parameters, parg,
1810 sizeof (struct dvb_frontend_parameters));
1811
1812 /* force auto frequency inversion if requested */
1813 if (dvb_force_auto_inversion) {
1814 fepriv->parameters.inversion = INVERSION_AUTO;
1815 fetunesettings.parameters.inversion = INVERSION_AUTO;
1816 }
1817 if (fe->ops.info.type == FE_OFDM) {
1818 /* without hierarchical coding code_rate_LP is irrelevant,
1819 * so we tolerate the otherwise invalid FEC_NONE setting */
1820 if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1821 fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1822 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1823 }
1824
1825 /* get frontend-specific tuning settings */
1826 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1827 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1828 fepriv->max_drift = fetunesettings.max_drift;
1829 fepriv->step_size = fetunesettings.step_size;
1830 } else {
1831 /* default values */
1832 switch(fe->ops.info.type) {
1833 case FE_QPSK:
1834 fepriv->min_delay = HZ/20;
1835 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1836 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1837 break;
1838
1839 case FE_QAM:
1840 fepriv->min_delay = HZ/20;
1841 fepriv->step_size = 0; /* no zigzag */
1842 fepriv->max_drift = 0;
1843 break;
1844
1845 case FE_OFDM:
1846 fepriv->min_delay = HZ/20;
1847 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1848 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1849 break;
1850 case FE_ATSC:
1851 fepriv->min_delay = HZ/20;
1852 fepriv->step_size = 0;
1853 fepriv->max_drift = 0;
1854 break;
1855 }
1856 }
1857 if (dvb_override_tune_delay > 0)
1858 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1859
1860 fepriv->state = FESTATE_RETUNE;
1861
1862 /* Request the search algorithm to search */
1863 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1864
1865 dvb_frontend_wakeup(fe);
1866 dvb_frontend_add_event(fe, 0);
1867 fepriv->status = 0;
1868 err = 0;
1869 break;
1870 }
1871
1872 case FE_GET_EVENT:
1873 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1874 break;
1875
1876 case FE_GET_FRONTEND:
1877 if (fe->ops.get_frontend) {
1878 memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1879 err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1880 }
1881 break;
1882
1883 case FE_SET_FRONTEND_TUNE_MODE:
1884 fepriv->tune_mode_flags = (unsigned long) parg;
1885 err = 0;
1886 break;
1887 };
1888
1889 if (fe->dvb->fe_ioctl_override) {
1890 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1891 DVB_FE_IOCTL_POST);
1892 if (cb_err < 0)
1893 return cb_err;
1894 }
1895
1896 return err;
1897 }
1898
1899
1900 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1901 {
1902 struct dvb_device *dvbdev = file->private_data;
1903 struct dvb_frontend *fe = dvbdev->priv;
1904 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1905
1906 dprintk ("%s\n", __func__);
1907
1908 poll_wait (file, &fepriv->events.wait_queue, wait);
1909
1910 if (fepriv->events.eventw != fepriv->events.eventr)
1911 return (POLLIN | POLLRDNORM | POLLPRI);
1912
1913 return 0;
1914 }
1915
1916 static int dvb_frontend_open(struct inode *inode, struct file *file)
1917 {
1918 struct dvb_device *dvbdev = file->private_data;
1919 struct dvb_frontend *fe = dvbdev->priv;
1920 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1921 struct dvb_adapter *adapter = fe->dvb;
1922 int ret;
1923
1924 dprintk ("%s\n", __func__);
1925 if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
1926 return -ENODEV;
1927
1928 if (adapter->mfe_shared) {
1929 mutex_lock (&adapter->mfe_lock);
1930
1931 if (adapter->mfe_dvbdev == NULL)
1932 adapter->mfe_dvbdev = dvbdev;
1933
1934 else if (adapter->mfe_dvbdev != dvbdev) {
1935 struct dvb_device
1936 *mfedev = adapter->mfe_dvbdev;
1937 struct dvb_frontend
1938 *mfe = mfedev->priv;
1939 struct dvb_frontend_private
1940 *mfepriv = mfe->frontend_priv;
1941 int mferetry = (dvb_mfe_wait_time << 1);
1942
1943 mutex_unlock (&adapter->mfe_lock);
1944 while (mferetry-- && (mfedev->users != -1 ||
1945 mfepriv->thread != NULL)) {
1946 if(msleep_interruptible(500)) {
1947 if(signal_pending(current))
1948 return -EINTR;
1949 }
1950 }
1951
1952 mutex_lock (&adapter->mfe_lock);
1953 if(adapter->mfe_dvbdev != dvbdev) {
1954 mfedev = adapter->mfe_dvbdev;
1955 mfe = mfedev->priv;
1956 mfepriv = mfe->frontend_priv;
1957 if (mfedev->users != -1 ||
1958 mfepriv->thread != NULL) {
1959 mutex_unlock (&adapter->mfe_lock);
1960 return -EBUSY;
1961 }
1962 adapter->mfe_dvbdev = dvbdev;
1963 }
1964 }
1965 }
1966
1967 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1968 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1969 goto err0;
1970 }
1971
1972 if ((ret = dvb_generic_open (inode, file)) < 0)
1973 goto err1;
1974
1975 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1976 /* normal tune mode when opened R/W */
1977 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1978 fepriv->tone = -1;
1979 fepriv->voltage = -1;
1980
1981 ret = dvb_frontend_start (fe);
1982 if (ret)
1983 goto err2;
1984
1985 /* empty event queue */
1986 fepriv->events.eventr = fepriv->events.eventw = 0;
1987 }
1988
1989 if (adapter->mfe_shared)
1990 mutex_unlock (&adapter->mfe_lock);
1991 return ret;
1992
1993 err2:
1994 dvb_generic_release(inode, file);
1995 err1:
1996 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1997 fe->ops.ts_bus_ctrl(fe, 0);
1998 err0:
1999 if (adapter->mfe_shared)
2000 mutex_unlock (&adapter->mfe_lock);
2001 return ret;
2002 }
2003
2004 static int dvb_frontend_release(struct inode *inode, struct file *file)
2005 {
2006 struct dvb_device *dvbdev = file->private_data;
2007 struct dvb_frontend *fe = dvbdev->priv;
2008 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2009 int ret;
2010
2011 dprintk ("%s\n", __func__);
2012
2013 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
2014 fepriv->release_jiffies = jiffies;
2015
2016 ret = dvb_generic_release (inode, file);
2017
2018 if (dvbdev->users == -1) {
2019 if (fepriv->exit != DVB_FE_NO_EXIT) {
2020 fops_put(file->f_op);
2021 file->f_op = NULL;
2022 wake_up(&dvbdev->wait_queue);
2023 }
2024 if (fe->ops.ts_bus_ctrl)
2025 fe->ops.ts_bus_ctrl(fe, 0);
2026 }
2027
2028 return ret;
2029 }
2030
2031 static const struct file_operations dvb_frontend_fops = {
2032 .owner = THIS_MODULE,
2033 .unlocked_ioctl = dvb_generic_ioctl,
2034 .poll = dvb_frontend_poll,
2035 .open = dvb_frontend_open,
2036 .release = dvb_frontend_release,
2037 .llseek = noop_llseek,
2038 };
2039
2040 int dvb_register_frontend(struct dvb_adapter* dvb,
2041 struct dvb_frontend* fe)
2042 {
2043 struct dvb_frontend_private *fepriv;
2044 static const struct dvb_device dvbdev_template = {
2045 .users = ~0,
2046 .writers = 1,
2047 .readers = (~0)-1,
2048 .fops = &dvb_frontend_fops,
2049 .kernel_ioctl = dvb_frontend_ioctl
2050 };
2051
2052 dprintk ("%s\n", __func__);
2053
2054 if (mutex_lock_interruptible(&frontend_mutex))
2055 return -ERESTARTSYS;
2056
2057 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2058 if (fe->frontend_priv == NULL) {
2059 mutex_unlock(&frontend_mutex);
2060 return -ENOMEM;
2061 }
2062 fepriv = fe->frontend_priv;
2063
2064 sema_init(&fepriv->sem, 1);
2065 init_waitqueue_head (&fepriv->wait_queue);
2066 init_waitqueue_head (&fepriv->events.wait_queue);
2067 mutex_init(&fepriv->events.mtx);
2068 fe->dvb = dvb;
2069 fepriv->inversion = INVERSION_OFF;
2070
2071 printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2072 fe->dvb->num,
2073 fe->id,
2074 fe->ops.info.name);
2075
2076 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2077 fe, DVB_DEVICE_FRONTEND);
2078
2079 mutex_unlock(&frontend_mutex);
2080 return 0;
2081 }
2082 EXPORT_SYMBOL(dvb_register_frontend);
2083
2084 int dvb_unregister_frontend(struct dvb_frontend* fe)
2085 {
2086 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2087 dprintk ("%s\n", __func__);
2088
2089 mutex_lock(&frontend_mutex);
2090 dvb_frontend_stop (fe);
2091 mutex_unlock(&frontend_mutex);
2092
2093 if (fepriv->dvbdev->users < -1)
2094 wait_event(fepriv->dvbdev->wait_queue,
2095 fepriv->dvbdev->users==-1);
2096
2097 mutex_lock(&frontend_mutex);
2098 dvb_unregister_device (fepriv->dvbdev);
2099
2100 /* fe is invalid now */
2101 kfree(fepriv);
2102 mutex_unlock(&frontend_mutex);
2103 return 0;
2104 }
2105 EXPORT_SYMBOL(dvb_unregister_frontend);
2106
2107 #ifdef CONFIG_MEDIA_ATTACH
2108 void dvb_frontend_detach(struct dvb_frontend* fe)
2109 {
2110 void *ptr;
2111
2112 if (fe->ops.release_sec) {
2113 fe->ops.release_sec(fe);
2114 symbol_put_addr(fe->ops.release_sec);
2115 }
2116 if (fe->ops.tuner_ops.release) {
2117 fe->ops.tuner_ops.release(fe);
2118 symbol_put_addr(fe->ops.tuner_ops.release);
2119 }
2120 if (fe->ops.analog_ops.release) {
2121 fe->ops.analog_ops.release(fe);
2122 symbol_put_addr(fe->ops.analog_ops.release);
2123 }
2124 ptr = (void*)fe->ops.release;
2125 if (ptr) {
2126 fe->ops.release(fe);
2127 symbol_put_addr(ptr);
2128 }
2129 }
2130 #else
2131 void dvb_frontend_detach(struct dvb_frontend* fe)
2132 {
2133 if (fe->ops.release_sec)
2134 fe->ops.release_sec(fe);
2135 if (fe->ops.tuner_ops.release)
2136 fe->ops.tuner_ops.release(fe);
2137 if (fe->ops.analog_ops.release)
2138 fe->ops.analog_ops.release(fe);
2139 if (fe->ops.release)
2140 fe->ops.release(fe);
2141 }
2142 #endif
2143 EXPORT_SYMBOL(dvb_frontend_detach);
CRIS linux kernel tree