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Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[deliverable/linux.git] / drivers / media / dvb / dvb-core / dvb_frontend.c
1 /*
2 * dvb_frontend.c: DVB frontend tuning interface/thread
3 *
4 *
5 * Copyright (C) 1999-2001 Ralph Metzler
6 * Marcus Metzler
7 * Holger Waechtler
8 * for convergence integrated media GmbH
9 *
10 * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
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/smp_lock.h>
40 #include <linux/kthread.h>
41 #include <asm/processor.h>
42
43 #include "dvb_frontend.h"
44 #include "dvbdev.h"
45 #include <linux/dvb/version.h>
46
47 static int dvb_frontend_debug;
48 static int dvb_shutdown_timeout;
49 static int dvb_force_auto_inversion;
50 static int dvb_override_tune_delay;
51 static int dvb_powerdown_on_sleep = 1;
52 static int dvb_mfe_wait_time = 5;
53
54 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
55 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
56 module_param(dvb_shutdown_timeout, int, 0644);
57 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
58 module_param(dvb_force_auto_inversion, int, 0644);
59 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
60 module_param(dvb_override_tune_delay, int, 0644);
61 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
62 module_param(dvb_powerdown_on_sleep, int, 0644);
63 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
64 module_param(dvb_mfe_wait_time, int, 0644);
65 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)");
66
67 #define dprintk if (dvb_frontend_debug) printk
68
69 #define FESTATE_IDLE 1
70 #define FESTATE_RETUNE 2
71 #define FESTATE_TUNING_FAST 4
72 #define FESTATE_TUNING_SLOW 8
73 #define FESTATE_TUNED 16
74 #define FESTATE_ZIGZAG_FAST 32
75 #define FESTATE_ZIGZAG_SLOW 64
76 #define FESTATE_DISEQC 128
77 #define FESTATE_ERROR 256
78 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
79 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
80 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
81 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
82
83 #define FE_ALGO_HW 1
84 /*
85 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
86 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
87 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
88 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
89 * FESTATE_TUNED. The frontend has successfully locked on.
90 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
91 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
92 * FESTATE_DISEQC. A DISEQC command has just been issued.
93 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
94 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
95 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
96 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
97 */
98
99 #define DVB_FE_NO_EXIT 0
100 #define DVB_FE_NORMAL_EXIT 1
101 #define DVB_FE_DEVICE_REMOVED 2
102
103 static DEFINE_MUTEX(frontend_mutex);
104
105 struct dvb_frontend_private {
106
107 /* thread/frontend values */
108 struct dvb_device *dvbdev;
109 struct dvb_frontend_parameters parameters;
110 struct dvb_fe_events events;
111 struct semaphore sem;
112 struct list_head list_head;
113 wait_queue_head_t wait_queue;
114 struct task_struct *thread;
115 unsigned long release_jiffies;
116 unsigned int exit;
117 unsigned int wakeup;
118 fe_status_t status;
119 unsigned long tune_mode_flags;
120 unsigned int delay;
121 unsigned int reinitialise;
122 int tone;
123 int voltage;
124
125 /* swzigzag values */
126 unsigned int state;
127 unsigned int bending;
128 int lnb_drift;
129 unsigned int inversion;
130 unsigned int auto_step;
131 unsigned int auto_sub_step;
132 unsigned int started_auto_step;
133 unsigned int min_delay;
134 unsigned int max_drift;
135 unsigned int step_size;
136 int quality;
137 unsigned int check_wrapped;
138 enum dvbfe_search algo_status;
139 };
140
141 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
142
143 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
144 {
145 struct dvb_frontend_private *fepriv = fe->frontend_priv;
146 struct dvb_fe_events *events = &fepriv->events;
147 struct dvb_frontend_event *e;
148 int wp;
149
150 dprintk ("%s\n", __func__);
151
152 if (mutex_lock_interruptible (&events->mtx))
153 return;
154
155 wp = (events->eventw + 1) % MAX_EVENT;
156
157 if (wp == events->eventr) {
158 events->overflow = 1;
159 events->eventr = (events->eventr + 1) % MAX_EVENT;
160 }
161
162 e = &events->events[events->eventw];
163
164 memcpy (&e->parameters, &fepriv->parameters,
165 sizeof (struct dvb_frontend_parameters));
166
167 if (status & FE_HAS_LOCK)
168 if (fe->ops.get_frontend)
169 fe->ops.get_frontend(fe, &e->parameters);
170
171 events->eventw = wp;
172
173 mutex_unlock(&events->mtx);
174
175 e->status = status;
176
177 wake_up_interruptible (&events->wait_queue);
178 }
179
180 static int dvb_frontend_get_event(struct dvb_frontend *fe,
181 struct dvb_frontend_event *event, int flags)
182 {
183 struct dvb_frontend_private *fepriv = fe->frontend_priv;
184 struct dvb_fe_events *events = &fepriv->events;
185
186 dprintk ("%s\n", __func__);
187
188 if (events->overflow) {
189 events->overflow = 0;
190 return -EOVERFLOW;
191 }
192
193 if (events->eventw == events->eventr) {
194 int ret;
195
196 if (flags & O_NONBLOCK)
197 return -EWOULDBLOCK;
198
199 up(&fepriv->sem);
200
201 ret = wait_event_interruptible (events->wait_queue,
202 events->eventw != events->eventr);
203
204 if (down_interruptible (&fepriv->sem))
205 return -ERESTARTSYS;
206
207 if (ret < 0)
208 return ret;
209 }
210
211 if (mutex_lock_interruptible (&events->mtx))
212 return -ERESTARTSYS;
213
214 memcpy (event, &events->events[events->eventr],
215 sizeof(struct dvb_frontend_event));
216
217 events->eventr = (events->eventr + 1) % MAX_EVENT;
218
219 mutex_unlock(&events->mtx);
220
221 return 0;
222 }
223
224 static void dvb_frontend_init(struct dvb_frontend *fe)
225 {
226 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
227 fe->dvb->num,
228 fe->id,
229 fe->ops.info.name);
230
231 if (fe->ops.init)
232 fe->ops.init(fe);
233 if (fe->ops.tuner_ops.init) {
234 if (fe->ops.i2c_gate_ctrl)
235 fe->ops.i2c_gate_ctrl(fe, 1);
236 fe->ops.tuner_ops.init(fe);
237 if (fe->ops.i2c_gate_ctrl)
238 fe->ops.i2c_gate_ctrl(fe, 0);
239 }
240 }
241
242 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
243 {
244 struct dvb_frontend_private *fepriv = fe->frontend_priv;
245
246 fepriv->reinitialise = 1;
247 dvb_frontend_wakeup(fe);
248 }
249 EXPORT_SYMBOL(dvb_frontend_reinitialise);
250
251 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
252 {
253 int q2;
254
255 dprintk ("%s\n", __func__);
256
257 if (locked)
258 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
259 else
260 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
261
262 q2 = fepriv->quality - 128;
263 q2 *= q2;
264
265 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
266 }
267
268 /**
269 * Performs automatic twiddling of frontend parameters.
270 *
271 * @param fe The frontend concerned.
272 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
273 * @returns Number of complete iterations that have been performed.
274 */
275 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
276 {
277 int autoinversion;
278 int ready = 0;
279 int fe_set_err = 0;
280 struct dvb_frontend_private *fepriv = fe->frontend_priv;
281 int original_inversion = fepriv->parameters.inversion;
282 u32 original_frequency = fepriv->parameters.frequency;
283
284 /* are we using autoinversion? */
285 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
286 (fepriv->parameters.inversion == INVERSION_AUTO));
287
288 /* setup parameters correctly */
289 while(!ready) {
290 /* calculate the lnb_drift */
291 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
292
293 /* wrap the auto_step if we've exceeded the maximum drift */
294 if (fepriv->lnb_drift > fepriv->max_drift) {
295 fepriv->auto_step = 0;
296 fepriv->auto_sub_step = 0;
297 fepriv->lnb_drift = 0;
298 }
299
300 /* perform inversion and +/- zigzag */
301 switch(fepriv->auto_sub_step) {
302 case 0:
303 /* try with the current inversion and current drift setting */
304 ready = 1;
305 break;
306
307 case 1:
308 if (!autoinversion) break;
309
310 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
311 ready = 1;
312 break;
313
314 case 2:
315 if (fepriv->lnb_drift == 0) break;
316
317 fepriv->lnb_drift = -fepriv->lnb_drift;
318 ready = 1;
319 break;
320
321 case 3:
322 if (fepriv->lnb_drift == 0) break;
323 if (!autoinversion) break;
324
325 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
326 fepriv->lnb_drift = -fepriv->lnb_drift;
327 ready = 1;
328 break;
329
330 default:
331 fepriv->auto_step++;
332 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
333 break;
334 }
335
336 if (!ready) fepriv->auto_sub_step++;
337 }
338
339 /* if this attempt would hit where we started, indicate a complete
340 * iteration has occurred */
341 if ((fepriv->auto_step == fepriv->started_auto_step) &&
342 (fepriv->auto_sub_step == 0) && check_wrapped) {
343 return 1;
344 }
345
346 dprintk("%s: drift:%i inversion:%i auto_step:%i "
347 "auto_sub_step:%i started_auto_step:%i\n",
348 __func__, fepriv->lnb_drift, fepriv->inversion,
349 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
350
351 /* set the frontend itself */
352 fepriv->parameters.frequency += fepriv->lnb_drift;
353 if (autoinversion)
354 fepriv->parameters.inversion = fepriv->inversion;
355 if (fe->ops.set_frontend)
356 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
357 if (fe_set_err < 0) {
358 fepriv->state = FESTATE_ERROR;
359 return fe_set_err;
360 }
361
362 fepriv->parameters.frequency = original_frequency;
363 fepriv->parameters.inversion = original_inversion;
364
365 fepriv->auto_sub_step++;
366 return 0;
367 }
368
369 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
370 {
371 fe_status_t s = 0;
372 int retval = 0;
373 struct dvb_frontend_private *fepriv = fe->frontend_priv;
374
375 /* if we've got no parameters, just keep idling */
376 if (fepriv->state & FESTATE_IDLE) {
377 fepriv->delay = 3*HZ;
378 fepriv->quality = 0;
379 return;
380 }
381
382 /* in SCAN mode, we just set the frontend when asked and leave it alone */
383 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
384 if (fepriv->state & FESTATE_RETUNE) {
385 if (fe->ops.set_frontend)
386 retval = fe->ops.set_frontend(fe,
387 &fepriv->parameters);
388 if (retval < 0)
389 fepriv->state = FESTATE_ERROR;
390 else
391 fepriv->state = FESTATE_TUNED;
392 }
393 fepriv->delay = 3*HZ;
394 fepriv->quality = 0;
395 return;
396 }
397
398 /* get the frontend status */
399 if (fepriv->state & FESTATE_RETUNE) {
400 s = 0;
401 } else {
402 if (fe->ops.read_status)
403 fe->ops.read_status(fe, &s);
404 if (s != fepriv->status) {
405 dvb_frontend_add_event(fe, s);
406 fepriv->status = s;
407 }
408 }
409
410 /* if we're not tuned, and we have a lock, move to the TUNED state */
411 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
412 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
413 fepriv->state = FESTATE_TUNED;
414
415 /* if we're tuned, then we have determined the correct inversion */
416 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
417 (fepriv->parameters.inversion == INVERSION_AUTO)) {
418 fepriv->parameters.inversion = fepriv->inversion;
419 }
420 return;
421 }
422
423 /* if we are tuned already, check we're still locked */
424 if (fepriv->state & FESTATE_TUNED) {
425 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
426
427 /* we're tuned, and the lock is still good... */
428 if (s & FE_HAS_LOCK) {
429 return;
430 } else { /* if we _WERE_ tuned, but now don't have a lock */
431 fepriv->state = FESTATE_ZIGZAG_FAST;
432 fepriv->started_auto_step = fepriv->auto_step;
433 fepriv->check_wrapped = 0;
434 }
435 }
436
437 /* don't actually do anything if we're in the LOSTLOCK state,
438 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
439 if ((fepriv->state & FESTATE_LOSTLOCK) &&
440 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
441 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
442 return;
443 }
444
445 /* don't do anything if we're in the DISEQC state, since this
446 * might be someone with a motorized dish controlled by DISEQC.
447 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
448 if (fepriv->state & FESTATE_DISEQC) {
449 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
450 return;
451 }
452
453 /* if we're in the RETUNE state, set everything up for a brand
454 * new scan, keeping the current inversion setting, as the next
455 * tune is _very_ likely to require the same */
456 if (fepriv->state & FESTATE_RETUNE) {
457 fepriv->lnb_drift = 0;
458 fepriv->auto_step = 0;
459 fepriv->auto_sub_step = 0;
460 fepriv->started_auto_step = 0;
461 fepriv->check_wrapped = 0;
462 }
463
464 /* fast zigzag. */
465 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
466 fepriv->delay = fepriv->min_delay;
467
468 /* perform a tune */
469 retval = dvb_frontend_swzigzag_autotune(fe,
470 fepriv->check_wrapped);
471 if (retval < 0) {
472 return;
473 } else if (retval) {
474 /* OK, if we've run out of trials at the fast speed.
475 * Drop back to slow for the _next_ attempt */
476 fepriv->state = FESTATE_SEARCHING_SLOW;
477 fepriv->started_auto_step = fepriv->auto_step;
478 return;
479 }
480 fepriv->check_wrapped = 1;
481
482 /* if we've just retuned, enter the ZIGZAG_FAST state.
483 * This ensures we cannot return from an
484 * FE_SET_FRONTEND ioctl before the first frontend tune
485 * occurs */
486 if (fepriv->state & FESTATE_RETUNE) {
487 fepriv->state = FESTATE_TUNING_FAST;
488 }
489 }
490
491 /* slow zigzag */
492 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
493 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
494
495 /* Note: don't bother checking for wrapping; we stay in this
496 * state until we get a lock */
497 dvb_frontend_swzigzag_autotune(fe, 0);
498 }
499 }
500
501 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
502 {
503 struct dvb_frontend_private *fepriv = fe->frontend_priv;
504
505 if (fepriv->exit != DVB_FE_NO_EXIT)
506 return 1;
507
508 if (fepriv->dvbdev->writers == 1)
509 if (time_after(jiffies, fepriv->release_jiffies +
510 dvb_shutdown_timeout * HZ))
511 return 1;
512
513 return 0;
514 }
515
516 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
517 {
518 struct dvb_frontend_private *fepriv = fe->frontend_priv;
519
520 if (fepriv->wakeup) {
521 fepriv->wakeup = 0;
522 return 1;
523 }
524 return dvb_frontend_is_exiting(fe);
525 }
526
527 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
528 {
529 struct dvb_frontend_private *fepriv = fe->frontend_priv;
530
531 fepriv->wakeup = 1;
532 wake_up_interruptible(&fepriv->wait_queue);
533 }
534
535 static int dvb_frontend_thread(void *data)
536 {
537 struct dvb_frontend *fe = data;
538 struct dvb_frontend_private *fepriv = fe->frontend_priv;
539 unsigned long timeout;
540 fe_status_t s;
541 enum dvbfe_algo algo;
542
543 struct dvb_frontend_parameters *params;
544
545 dprintk("%s\n", __func__);
546
547 fepriv->check_wrapped = 0;
548 fepriv->quality = 0;
549 fepriv->delay = 3*HZ;
550 fepriv->status = 0;
551 fepriv->wakeup = 0;
552 fepriv->reinitialise = 0;
553
554 dvb_frontend_init(fe);
555
556 set_freezable();
557 while (1) {
558 up(&fepriv->sem); /* is locked when we enter the thread... */
559 restart:
560 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
561 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
562 || freezing(current),
563 fepriv->delay);
564
565 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
566 /* got signal or quitting */
567 fepriv->exit = DVB_FE_NORMAL_EXIT;
568 break;
569 }
570
571 if (try_to_freeze())
572 goto restart;
573
574 if (down_interruptible(&fepriv->sem))
575 break;
576
577 if (fepriv->reinitialise) {
578 dvb_frontend_init(fe);
579 if (fepriv->tone != -1) {
580 fe->ops.set_tone(fe, fepriv->tone);
581 }
582 if (fepriv->voltage != -1) {
583 fe->ops.set_voltage(fe, fepriv->voltage);
584 }
585 fepriv->reinitialise = 0;
586 }
587
588 /* do an iteration of the tuning loop */
589 if (fe->ops.get_frontend_algo) {
590 algo = fe->ops.get_frontend_algo(fe);
591 switch (algo) {
592 case DVBFE_ALGO_HW:
593 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
594 params = NULL; /* have we been asked to RETUNE ? */
595
596 if (fepriv->state & FESTATE_RETUNE) {
597 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
598 params = &fepriv->parameters;
599 fepriv->state = FESTATE_TUNED;
600 }
601
602 if (fe->ops.tune)
603 fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
604
605 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
606 dprintk("%s: state changed, adding current state\n", __func__);
607 dvb_frontend_add_event(fe, s);
608 fepriv->status = s;
609 }
610 break;
611 case DVBFE_ALGO_SW:
612 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
613 dvb_frontend_swzigzag(fe);
614 break;
615 case DVBFE_ALGO_CUSTOM:
616 params = NULL; /* have we been asked to RETUNE ? */
617 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
618 if (fepriv->state & FESTATE_RETUNE) {
619 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
620 params = &fepriv->parameters;
621 fepriv->state = FESTATE_TUNED;
622 }
623 /* Case where we are going to search for a carrier
624 * User asked us to retune again for some reason, possibly
625 * requesting a search with a new set of parameters
626 */
627 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
628 if (fe->ops.search) {
629 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
630 /* We did do a search as was requested, the flags are
631 * now unset as well and has the flags wrt to search.
632 */
633 } else {
634 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
635 }
636 }
637 /* Track the carrier if the search was successful */
638 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
639 if (fe->ops.track)
640 fe->ops.track(fe, &fepriv->parameters);
641 } else {
642 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
643 fepriv->delay = HZ / 2;
644 }
645 fe->ops.read_status(fe, &s);
646 if (s != fepriv->status) {
647 dvb_frontend_add_event(fe, s); /* update event list */
648 fepriv->status = s;
649 if (!(s & FE_HAS_LOCK)) {
650 fepriv->delay = HZ / 10;
651 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
652 } else {
653 fepriv->delay = 60 * HZ;
654 }
655 }
656 break;
657 default:
658 dprintk("%s: UNDEFINED ALGO !\n", __func__);
659 break;
660 }
661 } else {
662 dvb_frontend_swzigzag(fe);
663 }
664 }
665
666 if (dvb_powerdown_on_sleep) {
667 if (fe->ops.set_voltage)
668 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
669 if (fe->ops.tuner_ops.sleep) {
670 if (fe->ops.i2c_gate_ctrl)
671 fe->ops.i2c_gate_ctrl(fe, 1);
672 fe->ops.tuner_ops.sleep(fe);
673 if (fe->ops.i2c_gate_ctrl)
674 fe->ops.i2c_gate_ctrl(fe, 0);
675 }
676 if (fe->ops.sleep)
677 fe->ops.sleep(fe);
678 }
679
680 fepriv->thread = NULL;
681 if (kthread_should_stop())
682 fepriv->exit = DVB_FE_DEVICE_REMOVED;
683 else
684 fepriv->exit = DVB_FE_NO_EXIT;
685 mb();
686
687 dvb_frontend_wakeup(fe);
688 return 0;
689 }
690
691 static void dvb_frontend_stop(struct dvb_frontend *fe)
692 {
693 struct dvb_frontend_private *fepriv = fe->frontend_priv;
694
695 dprintk ("%s\n", __func__);
696
697 fepriv->exit = DVB_FE_NORMAL_EXIT;
698 mb();
699
700 if (!fepriv->thread)
701 return;
702
703 kthread_stop(fepriv->thread);
704
705 sema_init(&fepriv->sem, 1);
706 fepriv->state = FESTATE_IDLE;
707
708 /* paranoia check in case a signal arrived */
709 if (fepriv->thread)
710 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
711 fepriv->thread);
712 }
713
714 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
715 {
716 return ((curtime.tv_usec < lasttime.tv_usec) ?
717 1000000 - lasttime.tv_usec + curtime.tv_usec :
718 curtime.tv_usec - lasttime.tv_usec);
719 }
720 EXPORT_SYMBOL(timeval_usec_diff);
721
722 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
723 {
724 curtime->tv_usec += add_usec;
725 if (curtime->tv_usec >= 1000000) {
726 curtime->tv_usec -= 1000000;
727 curtime->tv_sec++;
728 }
729 }
730
731 /*
732 * Sleep until gettimeofday() > waketime + add_usec
733 * This needs to be as precise as possible, but as the delay is
734 * usually between 2ms and 32ms, it is done using a scheduled msleep
735 * followed by usleep (normally a busy-wait loop) for the remainder
736 */
737 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
738 {
739 struct timeval lasttime;
740 s32 delta, newdelta;
741
742 timeval_usec_add(waketime, add_usec);
743
744 do_gettimeofday(&lasttime);
745 delta = timeval_usec_diff(lasttime, *waketime);
746 if (delta > 2500) {
747 msleep((delta - 1500) / 1000);
748 do_gettimeofday(&lasttime);
749 newdelta = timeval_usec_diff(lasttime, *waketime);
750 delta = (newdelta > delta) ? 0 : newdelta;
751 }
752 if (delta > 0)
753 udelay(delta);
754 }
755 EXPORT_SYMBOL(dvb_frontend_sleep_until);
756
757 static int dvb_frontend_start(struct dvb_frontend *fe)
758 {
759 int ret;
760 struct dvb_frontend_private *fepriv = fe->frontend_priv;
761 struct task_struct *fe_thread;
762
763 dprintk ("%s\n", __func__);
764
765 if (fepriv->thread) {
766 if (fepriv->exit == DVB_FE_NO_EXIT)
767 return 0;
768 else
769 dvb_frontend_stop (fe);
770 }
771
772 if (signal_pending(current))
773 return -EINTR;
774 if (down_interruptible (&fepriv->sem))
775 return -EINTR;
776
777 fepriv->state = FESTATE_IDLE;
778 fepriv->exit = DVB_FE_NO_EXIT;
779 fepriv->thread = NULL;
780 mb();
781
782 fe_thread = kthread_run(dvb_frontend_thread, fe,
783 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
784 if (IS_ERR(fe_thread)) {
785 ret = PTR_ERR(fe_thread);
786 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
787 up(&fepriv->sem);
788 return ret;
789 }
790 fepriv->thread = fe_thread;
791 return 0;
792 }
793
794 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
795 u32 *freq_min, u32 *freq_max)
796 {
797 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
798
799 if (fe->ops.info.frequency_max == 0)
800 *freq_max = fe->ops.tuner_ops.info.frequency_max;
801 else if (fe->ops.tuner_ops.info.frequency_max == 0)
802 *freq_max = fe->ops.info.frequency_max;
803 else
804 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
805
806 if (*freq_min == 0 || *freq_max == 0)
807 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
808 fe->dvb->num,fe->id);
809 }
810
811 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
812 struct dvb_frontend_parameters *parms)
813 {
814 u32 freq_min;
815 u32 freq_max;
816
817 /* range check: frequency */
818 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
819 if ((freq_min && parms->frequency < freq_min) ||
820 (freq_max && parms->frequency > freq_max)) {
821 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
822 fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
823 return -EINVAL;
824 }
825
826 /* range check: symbol rate */
827 if (fe->ops.info.type == FE_QPSK) {
828 if ((fe->ops.info.symbol_rate_min &&
829 parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
830 (fe->ops.info.symbol_rate_max &&
831 parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
832 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
833 fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
834 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
835 return -EINVAL;
836 }
837
838 } else if (fe->ops.info.type == FE_QAM) {
839 if ((fe->ops.info.symbol_rate_min &&
840 parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
841 (fe->ops.info.symbol_rate_max &&
842 parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
843 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
844 fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
845 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
846 return -EINVAL;
847 }
848 }
849
850 /* check for supported modulation */
851 if (fe->ops.info.type == FE_QAM &&
852 (parms->u.qam.modulation > QAM_AUTO ||
853 !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
854 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
855 fe->dvb->num, fe->id, parms->u.qam.modulation);
856 return -EINVAL;
857 }
858
859 return 0;
860 }
861
862 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
863 {
864 int i;
865
866 memset(&(fe->dtv_property_cache), 0,
867 sizeof(struct dtv_frontend_properties));
868
869 fe->dtv_property_cache.state = DTV_CLEAR;
870 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
871 fe->dtv_property_cache.inversion = INVERSION_AUTO;
872 fe->dtv_property_cache.fec_inner = FEC_AUTO;
873 fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO;
874 fe->dtv_property_cache.bandwidth_hz = BANDWIDTH_AUTO;
875 fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO;
876 fe->dtv_property_cache.hierarchy = HIERARCHY_AUTO;
877 fe->dtv_property_cache.symbol_rate = QAM_AUTO;
878 fe->dtv_property_cache.code_rate_HP = FEC_AUTO;
879 fe->dtv_property_cache.code_rate_LP = FEC_AUTO;
880
881 fe->dtv_property_cache.isdbt_partial_reception = -1;
882 fe->dtv_property_cache.isdbt_sb_mode = -1;
883 fe->dtv_property_cache.isdbt_sb_subchannel = -1;
884 fe->dtv_property_cache.isdbt_sb_segment_idx = -1;
885 fe->dtv_property_cache.isdbt_sb_segment_count = -1;
886 fe->dtv_property_cache.isdbt_layer_enabled = 0x7;
887 for (i = 0; i < 3; i++) {
888 fe->dtv_property_cache.layer[i].fec = FEC_AUTO;
889 fe->dtv_property_cache.layer[i].modulation = QAM_AUTO;
890 fe->dtv_property_cache.layer[i].interleaving = -1;
891 fe->dtv_property_cache.layer[i].segment_count = -1;
892 }
893
894 return 0;
895 }
896
897 #define _DTV_CMD(n, s, b) \
898 [n] = { \
899 .name = #n, \
900 .cmd = n, \
901 .set = s,\
902 .buffer = b \
903 }
904
905 static struct dtv_cmds_h dtv_cmds[] = {
906 _DTV_CMD(DTV_TUNE, 1, 0),
907 _DTV_CMD(DTV_CLEAR, 1, 0),
908
909 /* Set */
910 _DTV_CMD(DTV_FREQUENCY, 1, 0),
911 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
912 _DTV_CMD(DTV_MODULATION, 1, 0),
913 _DTV_CMD(DTV_INVERSION, 1, 0),
914 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
915 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
916 _DTV_CMD(DTV_INNER_FEC, 1, 0),
917 _DTV_CMD(DTV_VOLTAGE, 1, 0),
918 _DTV_CMD(DTV_TONE, 1, 0),
919 _DTV_CMD(DTV_PILOT, 1, 0),
920 _DTV_CMD(DTV_ROLLOFF, 1, 0),
921 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
922 _DTV_CMD(DTV_HIERARCHY, 1, 0),
923 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
924 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
925 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
926 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
927
928 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
929 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
930 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
931 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
932 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
933 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
934 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
935 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
936 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
937 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
938 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
939 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
940 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
941 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
942 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
943 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
944 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
945 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
946
947 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
948 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
949 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
950 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
951 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
952 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
953 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
954 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
955 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
956 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
957 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
958 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
959 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
960 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
961 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
962 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
963 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
964 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
965
966 _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
967
968 /* Get */
969 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
970 _DTV_CMD(DTV_API_VERSION, 0, 0),
971 _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
972 _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
973 _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
974 _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
975 _DTV_CMD(DTV_HIERARCHY, 0, 0),
976 };
977
978 static void dtv_property_dump(struct dtv_property *tvp)
979 {
980 int i;
981
982 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
983 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
984 __func__, tvp->cmd);
985 return;
986 }
987
988 dprintk("%s() tvp.cmd = 0x%08x (%s)\n"
989 ,__func__
990 ,tvp->cmd
991 ,dtv_cmds[ tvp->cmd ].name);
992
993 if(dtv_cmds[ tvp->cmd ].buffer) {
994
995 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
996 ,__func__
997 ,tvp->u.buffer.len);
998
999 for(i = 0; i < tvp->u.buffer.len; i++)
1000 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1001 ,__func__
1002 ,i
1003 ,tvp->u.buffer.data[i]);
1004
1005 } else
1006 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1007 }
1008
1009 static int is_legacy_delivery_system(fe_delivery_system_t s)
1010 {
1011 if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1012 (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1013 (s == SYS_ATSC))
1014 return 1;
1015
1016 return 0;
1017 }
1018
1019 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1020 * drivers can use a single set_frontend tuning function, regardless of whether
1021 * it's being used for the legacy or new API, reducing code and complexity.
1022 */
1023 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1024 struct dvb_frontend_parameters *p)
1025 {
1026 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1027
1028 c->frequency = p->frequency;
1029 c->inversion = p->inversion;
1030
1031 switch (fe->ops.info.type) {
1032 case FE_QPSK:
1033 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1034 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1035 c->symbol_rate = p->u.qpsk.symbol_rate;
1036 c->fec_inner = p->u.qpsk.fec_inner;
1037 c->delivery_system = SYS_DVBS;
1038 break;
1039 case FE_QAM:
1040 c->symbol_rate = p->u.qam.symbol_rate;
1041 c->fec_inner = p->u.qam.fec_inner;
1042 c->modulation = p->u.qam.modulation;
1043 c->delivery_system = SYS_DVBC_ANNEX_AC;
1044 break;
1045 case FE_OFDM:
1046 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1047 c->bandwidth_hz = 6000000;
1048 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1049 c->bandwidth_hz = 7000000;
1050 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1051 c->bandwidth_hz = 8000000;
1052 else
1053 /* Including BANDWIDTH_AUTO */
1054 c->bandwidth_hz = 0;
1055 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1056 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1057 c->modulation = p->u.ofdm.constellation;
1058 c->transmission_mode = p->u.ofdm.transmission_mode;
1059 c->guard_interval = p->u.ofdm.guard_interval;
1060 c->hierarchy = p->u.ofdm.hierarchy_information;
1061 c->delivery_system = SYS_DVBT;
1062 break;
1063 case FE_ATSC:
1064 c->modulation = p->u.vsb.modulation;
1065 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1066 c->delivery_system = SYS_ATSC;
1067 else
1068 c->delivery_system = SYS_DVBC_ANNEX_B;
1069 break;
1070 }
1071 }
1072
1073 /* Ensure the cached values are set correctly in the frontend
1074 * legacy tuning structures, for the advanced tuning API.
1075 */
1076 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1077 {
1078 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1079 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1080 struct dvb_frontend_parameters *p = &fepriv->parameters;
1081
1082 p->frequency = c->frequency;
1083 p->inversion = c->inversion;
1084
1085 switch (fe->ops.info.type) {
1086 case FE_QPSK:
1087 dprintk("%s() Preparing QPSK req\n", __func__);
1088 p->u.qpsk.symbol_rate = c->symbol_rate;
1089 p->u.qpsk.fec_inner = c->fec_inner;
1090 c->delivery_system = SYS_DVBS;
1091 break;
1092 case FE_QAM:
1093 dprintk("%s() Preparing QAM req\n", __func__);
1094 p->u.qam.symbol_rate = c->symbol_rate;
1095 p->u.qam.fec_inner = c->fec_inner;
1096 p->u.qam.modulation = c->modulation;
1097 c->delivery_system = SYS_DVBC_ANNEX_AC;
1098 break;
1099 case FE_OFDM:
1100 dprintk("%s() Preparing OFDM req\n", __func__);
1101 if (c->bandwidth_hz == 6000000)
1102 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1103 else if (c->bandwidth_hz == 7000000)
1104 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1105 else if (c->bandwidth_hz == 8000000)
1106 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1107 else
1108 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1109 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1110 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1111 p->u.ofdm.constellation = c->modulation;
1112 p->u.ofdm.transmission_mode = c->transmission_mode;
1113 p->u.ofdm.guard_interval = c->guard_interval;
1114 p->u.ofdm.hierarchy_information = c->hierarchy;
1115 c->delivery_system = SYS_DVBT;
1116 break;
1117 case FE_ATSC:
1118 dprintk("%s() Preparing VSB req\n", __func__);
1119 p->u.vsb.modulation = c->modulation;
1120 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1121 c->delivery_system = SYS_ATSC;
1122 else
1123 c->delivery_system = SYS_DVBC_ANNEX_B;
1124 break;
1125 }
1126 }
1127
1128 /* Ensure the cached values are set correctly in the frontend
1129 * legacy tuning structures, for the legacy tuning API.
1130 */
1131 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1132 {
1133 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1134 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1135 struct dvb_frontend_parameters *p = &fepriv->parameters;
1136
1137 p->frequency = c->frequency;
1138 p->inversion = c->inversion;
1139
1140 switch(c->modulation) {
1141 case PSK_8:
1142 case APSK_16:
1143 case APSK_32:
1144 case QPSK:
1145 p->u.qpsk.symbol_rate = c->symbol_rate;
1146 p->u.qpsk.fec_inner = c->fec_inner;
1147 break;
1148 default:
1149 break;
1150 }
1151
1152 if(c->delivery_system == SYS_ISDBT) {
1153 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1154 p->frequency = c->frequency;
1155 p->inversion = c->inversion;
1156 p->u.ofdm.constellation = QAM_AUTO;
1157 p->u.ofdm.code_rate_HP = FEC_AUTO;
1158 p->u.ofdm.code_rate_LP = FEC_AUTO;
1159 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1160 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1161 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1162 if (c->bandwidth_hz == 8000000)
1163 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1164 else if (c->bandwidth_hz == 7000000)
1165 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1166 else if (c->bandwidth_hz == 6000000)
1167 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1168 else
1169 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1170 }
1171 }
1172
1173 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1174 {
1175 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1176
1177 /* For legacy delivery systems we don't need the delivery_system to
1178 * be specified, but we populate the older structures from the cache
1179 * so we can call set_frontend on older drivers.
1180 */
1181 if(is_legacy_delivery_system(c->delivery_system)) {
1182
1183 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1184 dtv_property_legacy_params_sync(fe);
1185
1186 } else {
1187 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1188
1189 /* For advanced delivery systems / modulation types ...
1190 * we seed the lecacy dvb_frontend_parameters structure
1191 * so that the sanity checking code later in the IOCTL processing
1192 * can validate our basic frequency ranges, symbolrates, modulation
1193 * etc.
1194 */
1195 dtv_property_adv_params_sync(fe);
1196 }
1197 }
1198
1199 static int dvb_frontend_ioctl_legacy(struct file *file,
1200 unsigned int cmd, void *parg);
1201 static int dvb_frontend_ioctl_properties(struct file *file,
1202 unsigned int cmd, void *parg);
1203
1204 static int dtv_property_process_get(struct dvb_frontend *fe,
1205 struct dtv_property *tvp,
1206 struct file *file)
1207 {
1208 int r = 0;
1209
1210 /* Allow the frontend to validate incoming properties */
1211 if (fe->ops.get_property)
1212 r = fe->ops.get_property(fe, tvp);
1213
1214 if (r < 0)
1215 return r;
1216
1217 switch(tvp->cmd) {
1218 case DTV_FREQUENCY:
1219 tvp->u.data = fe->dtv_property_cache.frequency;
1220 break;
1221 case DTV_MODULATION:
1222 tvp->u.data = fe->dtv_property_cache.modulation;
1223 break;
1224 case DTV_BANDWIDTH_HZ:
1225 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1226 break;
1227 case DTV_INVERSION:
1228 tvp->u.data = fe->dtv_property_cache.inversion;
1229 break;
1230 case DTV_SYMBOL_RATE:
1231 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1232 break;
1233 case DTV_INNER_FEC:
1234 tvp->u.data = fe->dtv_property_cache.fec_inner;
1235 break;
1236 case DTV_PILOT:
1237 tvp->u.data = fe->dtv_property_cache.pilot;
1238 break;
1239 case DTV_ROLLOFF:
1240 tvp->u.data = fe->dtv_property_cache.rolloff;
1241 break;
1242 case DTV_DELIVERY_SYSTEM:
1243 tvp->u.data = fe->dtv_property_cache.delivery_system;
1244 break;
1245 case DTV_VOLTAGE:
1246 tvp->u.data = fe->dtv_property_cache.voltage;
1247 break;
1248 case DTV_TONE:
1249 tvp->u.data = fe->dtv_property_cache.sectone;
1250 break;
1251 case DTV_API_VERSION:
1252 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1253 break;
1254 case DTV_CODE_RATE_HP:
1255 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1256 break;
1257 case DTV_CODE_RATE_LP:
1258 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1259 break;
1260 case DTV_GUARD_INTERVAL:
1261 tvp->u.data = fe->dtv_property_cache.guard_interval;
1262 break;
1263 case DTV_TRANSMISSION_MODE:
1264 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1265 break;
1266 case DTV_HIERARCHY:
1267 tvp->u.data = fe->dtv_property_cache.hierarchy;
1268 break;
1269
1270 /* ISDB-T Support here */
1271 case DTV_ISDBT_PARTIAL_RECEPTION:
1272 tvp->u.data = fe->dtv_property_cache.isdbt_partial_reception;
1273 break;
1274 case DTV_ISDBT_SOUND_BROADCASTING:
1275 tvp->u.data = fe->dtv_property_cache.isdbt_sb_mode;
1276 break;
1277 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1278 tvp->u.data = fe->dtv_property_cache.isdbt_sb_subchannel;
1279 break;
1280 case DTV_ISDBT_SB_SEGMENT_IDX:
1281 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_idx;
1282 break;
1283 case DTV_ISDBT_SB_SEGMENT_COUNT:
1284 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_count;
1285 break;
1286 case DTV_ISDBT_LAYER_ENABLED:
1287 tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled;
1288 break;
1289 case DTV_ISDBT_LAYERA_FEC:
1290 tvp->u.data = fe->dtv_property_cache.layer[0].fec;
1291 break;
1292 case DTV_ISDBT_LAYERA_MODULATION:
1293 tvp->u.data = fe->dtv_property_cache.layer[0].modulation;
1294 break;
1295 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1296 tvp->u.data = fe->dtv_property_cache.layer[0].segment_count;
1297 break;
1298 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1299 tvp->u.data = fe->dtv_property_cache.layer[0].interleaving;
1300 break;
1301 case DTV_ISDBT_LAYERB_FEC:
1302 tvp->u.data = fe->dtv_property_cache.layer[1].fec;
1303 break;
1304 case DTV_ISDBT_LAYERB_MODULATION:
1305 tvp->u.data = fe->dtv_property_cache.layer[1].modulation;
1306 break;
1307 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1308 tvp->u.data = fe->dtv_property_cache.layer[1].segment_count;
1309 break;
1310 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1311 tvp->u.data = fe->dtv_property_cache.layer[1].interleaving;
1312 break;
1313 case DTV_ISDBT_LAYERC_FEC:
1314 tvp->u.data = fe->dtv_property_cache.layer[2].fec;
1315 break;
1316 case DTV_ISDBT_LAYERC_MODULATION:
1317 tvp->u.data = fe->dtv_property_cache.layer[2].modulation;
1318 break;
1319 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1320 tvp->u.data = fe->dtv_property_cache.layer[2].segment_count;
1321 break;
1322 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1323 tvp->u.data = fe->dtv_property_cache.layer[2].interleaving;
1324 break;
1325 case DTV_ISDBS_TS_ID:
1326 tvp->u.data = fe->dtv_property_cache.isdbs_ts_id;
1327 break;
1328 default:
1329 r = -1;
1330 }
1331
1332 dtv_property_dump(tvp);
1333
1334 return r;
1335 }
1336
1337 static int dtv_property_process_set(struct dvb_frontend *fe,
1338 struct dtv_property *tvp,
1339 struct file *file)
1340 {
1341 int r = 0;
1342 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1343 dtv_property_dump(tvp);
1344
1345 /* Allow the frontend to validate incoming properties */
1346 if (fe->ops.set_property)
1347 r = fe->ops.set_property(fe, tvp);
1348
1349 if (r < 0)
1350 return r;
1351
1352 switch(tvp->cmd) {
1353 case DTV_CLEAR:
1354 /* Reset a cache of data specific to the frontend here. This does
1355 * not effect hardware.
1356 */
1357 dvb_frontend_clear_cache(fe);
1358 dprintk("%s() Flushing property cache\n", __func__);
1359 break;
1360 case DTV_TUNE:
1361 /* interpret the cache of data, build either a traditional frontend
1362 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1363 * ioctl.
1364 */
1365 fe->dtv_property_cache.state = tvp->cmd;
1366 dprintk("%s() Finalised property cache\n", __func__);
1367 dtv_property_cache_submit(fe);
1368
1369 r |= dvb_frontend_ioctl_legacy(file, FE_SET_FRONTEND,
1370 &fepriv->parameters);
1371 break;
1372 case DTV_FREQUENCY:
1373 fe->dtv_property_cache.frequency = tvp->u.data;
1374 break;
1375 case DTV_MODULATION:
1376 fe->dtv_property_cache.modulation = tvp->u.data;
1377 break;
1378 case DTV_BANDWIDTH_HZ:
1379 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1380 break;
1381 case DTV_INVERSION:
1382 fe->dtv_property_cache.inversion = tvp->u.data;
1383 break;
1384 case DTV_SYMBOL_RATE:
1385 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1386 break;
1387 case DTV_INNER_FEC:
1388 fe->dtv_property_cache.fec_inner = tvp->u.data;
1389 break;
1390 case DTV_PILOT:
1391 fe->dtv_property_cache.pilot = tvp->u.data;
1392 break;
1393 case DTV_ROLLOFF:
1394 fe->dtv_property_cache.rolloff = tvp->u.data;
1395 break;
1396 case DTV_DELIVERY_SYSTEM:
1397 fe->dtv_property_cache.delivery_system = tvp->u.data;
1398 break;
1399 case DTV_VOLTAGE:
1400 fe->dtv_property_cache.voltage = tvp->u.data;
1401 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1402 (void *)fe->dtv_property_cache.voltage);
1403 break;
1404 case DTV_TONE:
1405 fe->dtv_property_cache.sectone = tvp->u.data;
1406 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1407 (void *)fe->dtv_property_cache.sectone);
1408 break;
1409 case DTV_CODE_RATE_HP:
1410 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1411 break;
1412 case DTV_CODE_RATE_LP:
1413 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1414 break;
1415 case DTV_GUARD_INTERVAL:
1416 fe->dtv_property_cache.guard_interval = tvp->u.data;
1417 break;
1418 case DTV_TRANSMISSION_MODE:
1419 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1420 break;
1421 case DTV_HIERARCHY:
1422 fe->dtv_property_cache.hierarchy = tvp->u.data;
1423 break;
1424
1425 /* ISDB-T Support here */
1426 case DTV_ISDBT_PARTIAL_RECEPTION:
1427 fe->dtv_property_cache.isdbt_partial_reception = tvp->u.data;
1428 break;
1429 case DTV_ISDBT_SOUND_BROADCASTING:
1430 fe->dtv_property_cache.isdbt_sb_mode = tvp->u.data;
1431 break;
1432 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1433 fe->dtv_property_cache.isdbt_sb_subchannel = tvp->u.data;
1434 break;
1435 case DTV_ISDBT_SB_SEGMENT_IDX:
1436 fe->dtv_property_cache.isdbt_sb_segment_idx = tvp->u.data;
1437 break;
1438 case DTV_ISDBT_SB_SEGMENT_COUNT:
1439 fe->dtv_property_cache.isdbt_sb_segment_count = tvp->u.data;
1440 break;
1441 case DTV_ISDBT_LAYER_ENABLED:
1442 fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data;
1443 break;
1444 case DTV_ISDBT_LAYERA_FEC:
1445 fe->dtv_property_cache.layer[0].fec = tvp->u.data;
1446 break;
1447 case DTV_ISDBT_LAYERA_MODULATION:
1448 fe->dtv_property_cache.layer[0].modulation = tvp->u.data;
1449 break;
1450 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1451 fe->dtv_property_cache.layer[0].segment_count = tvp->u.data;
1452 break;
1453 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1454 fe->dtv_property_cache.layer[0].interleaving = tvp->u.data;
1455 break;
1456 case DTV_ISDBT_LAYERB_FEC:
1457 fe->dtv_property_cache.layer[1].fec = tvp->u.data;
1458 break;
1459 case DTV_ISDBT_LAYERB_MODULATION:
1460 fe->dtv_property_cache.layer[1].modulation = tvp->u.data;
1461 break;
1462 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1463 fe->dtv_property_cache.layer[1].segment_count = tvp->u.data;
1464 break;
1465 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1466 fe->dtv_property_cache.layer[1].interleaving = tvp->u.data;
1467 break;
1468 case DTV_ISDBT_LAYERC_FEC:
1469 fe->dtv_property_cache.layer[2].fec = tvp->u.data;
1470 break;
1471 case DTV_ISDBT_LAYERC_MODULATION:
1472 fe->dtv_property_cache.layer[2].modulation = tvp->u.data;
1473 break;
1474 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1475 fe->dtv_property_cache.layer[2].segment_count = tvp->u.data;
1476 break;
1477 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1478 fe->dtv_property_cache.layer[2].interleaving = tvp->u.data;
1479 break;
1480 case DTV_ISDBS_TS_ID:
1481 fe->dtv_property_cache.isdbs_ts_id = tvp->u.data;
1482 break;
1483 default:
1484 r = -1;
1485 }
1486
1487 return r;
1488 }
1489
1490 static int dvb_frontend_ioctl(struct file *file,
1491 unsigned int cmd, void *parg)
1492 {
1493 struct dvb_device *dvbdev = file->private_data;
1494 struct dvb_frontend *fe = dvbdev->priv;
1495 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1496 int err = -EOPNOTSUPP;
1497
1498 dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1499
1500 if (fepriv->exit != DVB_FE_NO_EXIT)
1501 return -ENODEV;
1502
1503 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1504 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1505 cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1506 return -EPERM;
1507
1508 if (down_interruptible (&fepriv->sem))
1509 return -ERESTARTSYS;
1510
1511 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1512 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1513 else {
1514 fe->dtv_property_cache.state = DTV_UNDEFINED;
1515 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1516 }
1517
1518 up(&fepriv->sem);
1519 return err;
1520 }
1521
1522 static int dvb_frontend_ioctl_properties(struct file *file,
1523 unsigned int cmd, void *parg)
1524 {
1525 struct dvb_device *dvbdev = file->private_data;
1526 struct dvb_frontend *fe = dvbdev->priv;
1527 int err = 0;
1528
1529 struct dtv_properties *tvps = NULL;
1530 struct dtv_property *tvp = NULL;
1531 int i;
1532
1533 dprintk("%s\n", __func__);
1534
1535 if(cmd == FE_SET_PROPERTY) {
1536 tvps = (struct dtv_properties __user *)parg;
1537
1538 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1539 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1540
1541 /* Put an arbitrary limit on the number of messages that can
1542 * be sent at once */
1543 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1544 return -EINVAL;
1545
1546 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1547 if (!tvp) {
1548 err = -ENOMEM;
1549 goto out;
1550 }
1551
1552 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1553 err = -EFAULT;
1554 goto out;
1555 }
1556
1557 for (i = 0; i < tvps->num; i++) {
1558 (tvp + i)->result = dtv_property_process_set(fe, tvp + i, file);
1559 err |= (tvp + i)->result;
1560 }
1561
1562 if(fe->dtv_property_cache.state == DTV_TUNE)
1563 dprintk("%s() Property cache is full, tuning\n", __func__);
1564
1565 } else
1566 if(cmd == FE_GET_PROPERTY) {
1567
1568 tvps = (struct dtv_properties __user *)parg;
1569
1570 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1571 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1572
1573 /* Put an arbitrary limit on the number of messages that can
1574 * be sent at once */
1575 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1576 return -EINVAL;
1577
1578 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1579 if (!tvp) {
1580 err = -ENOMEM;
1581 goto out;
1582 }
1583
1584 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1585 err = -EFAULT;
1586 goto out;
1587 }
1588
1589 for (i = 0; i < tvps->num; i++) {
1590 (tvp + i)->result = dtv_property_process_get(fe, tvp + i, file);
1591 err |= (tvp + i)->result;
1592 }
1593
1594 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1595 err = -EFAULT;
1596 goto out;
1597 }
1598
1599 } else
1600 err = -EOPNOTSUPP;
1601
1602 out:
1603 kfree(tvp);
1604 return err;
1605 }
1606
1607 static int dvb_frontend_ioctl_legacy(struct file *file,
1608 unsigned int cmd, void *parg)
1609 {
1610 struct dvb_device *dvbdev = file->private_data;
1611 struct dvb_frontend *fe = dvbdev->priv;
1612 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1613 int cb_err, err = -EOPNOTSUPP;
1614
1615 if (fe->dvb->fe_ioctl_override) {
1616 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1617 DVB_FE_IOCTL_PRE);
1618 if (cb_err < 0)
1619 return cb_err;
1620 if (cb_err > 0)
1621 return 0;
1622 /* fe_ioctl_override returning 0 allows
1623 * dvb-core to continue handling the ioctl */
1624 }
1625
1626 switch (cmd) {
1627 case FE_GET_INFO: {
1628 struct dvb_frontend_info* info = parg;
1629 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1630 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1631
1632 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1633 * do it, it is done for it. */
1634 info->caps |= FE_CAN_INVERSION_AUTO;
1635 err = 0;
1636 break;
1637 }
1638
1639 case FE_READ_STATUS: {
1640 fe_status_t* status = parg;
1641
1642 /* if retune was requested but hasn't occured yet, prevent
1643 * that user get signal state from previous tuning */
1644 if (fepriv->state == FESTATE_RETUNE ||
1645 fepriv->state == FESTATE_ERROR) {
1646 err=0;
1647 *status = 0;
1648 break;
1649 }
1650
1651 if (fe->ops.read_status)
1652 err = fe->ops.read_status(fe, status);
1653 break;
1654 }
1655 case FE_READ_BER:
1656 if (fe->ops.read_ber)
1657 err = fe->ops.read_ber(fe, (__u32*) parg);
1658 break;
1659
1660 case FE_READ_SIGNAL_STRENGTH:
1661 if (fe->ops.read_signal_strength)
1662 err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1663 break;
1664
1665 case FE_READ_SNR:
1666 if (fe->ops.read_snr)
1667 err = fe->ops.read_snr(fe, (__u16*) parg);
1668 break;
1669
1670 case FE_READ_UNCORRECTED_BLOCKS:
1671 if (fe->ops.read_ucblocks)
1672 err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1673 break;
1674
1675
1676 case FE_DISEQC_RESET_OVERLOAD:
1677 if (fe->ops.diseqc_reset_overload) {
1678 err = fe->ops.diseqc_reset_overload(fe);
1679 fepriv->state = FESTATE_DISEQC;
1680 fepriv->status = 0;
1681 }
1682 break;
1683
1684 case FE_DISEQC_SEND_MASTER_CMD:
1685 if (fe->ops.diseqc_send_master_cmd) {
1686 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1687 fepriv->state = FESTATE_DISEQC;
1688 fepriv->status = 0;
1689 }
1690 break;
1691
1692 case FE_DISEQC_SEND_BURST:
1693 if (fe->ops.diseqc_send_burst) {
1694 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1695 fepriv->state = FESTATE_DISEQC;
1696 fepriv->status = 0;
1697 }
1698 break;
1699
1700 case FE_SET_TONE:
1701 if (fe->ops.set_tone) {
1702 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1703 fepriv->tone = (fe_sec_tone_mode_t) parg;
1704 fepriv->state = FESTATE_DISEQC;
1705 fepriv->status = 0;
1706 }
1707 break;
1708
1709 case FE_SET_VOLTAGE:
1710 if (fe->ops.set_voltage) {
1711 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1712 fepriv->voltage = (fe_sec_voltage_t) parg;
1713 fepriv->state = FESTATE_DISEQC;
1714 fepriv->status = 0;
1715 }
1716 break;
1717
1718 case FE_DISHNETWORK_SEND_LEGACY_CMD:
1719 if (fe->ops.dishnetwork_send_legacy_command) {
1720 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1721 fepriv->state = FESTATE_DISEQC;
1722 fepriv->status = 0;
1723 } else if (fe->ops.set_voltage) {
1724 /*
1725 * NOTE: This is a fallback condition. Some frontends
1726 * (stv0299 for instance) take longer than 8msec to
1727 * respond to a set_voltage command. Those switches
1728 * need custom routines to switch properly. For all
1729 * other frontends, the following should work ok.
1730 * Dish network legacy switches (as used by Dish500)
1731 * are controlled by sending 9-bit command words
1732 * spaced 8msec apart.
1733 * the actual command word is switch/port dependant
1734 * so it is up to the userspace application to send
1735 * the right command.
1736 * The command must always start with a '0' after
1737 * initialization, so parg is 8 bits and does not
1738 * include the initialization or start bit
1739 */
1740 unsigned long swcmd = ((unsigned long) parg) << 1;
1741 struct timeval nexttime;
1742 struct timeval tv[10];
1743 int i;
1744 u8 last = 1;
1745 if (dvb_frontend_debug)
1746 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1747 do_gettimeofday(&nexttime);
1748 if (dvb_frontend_debug)
1749 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1750 /* before sending a command, initialize by sending
1751 * a 32ms 18V to the switch
1752 */
1753 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1754 dvb_frontend_sleep_until(&nexttime, 32000);
1755
1756 for (i = 0; i < 9; i++) {
1757 if (dvb_frontend_debug)
1758 do_gettimeofday(&tv[i + 1]);
1759 if ((swcmd & 0x01) != last) {
1760 /* set voltage to (last ? 13V : 18V) */
1761 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1762 last = (last) ? 0 : 1;
1763 }
1764 swcmd = swcmd >> 1;
1765 if (i != 8)
1766 dvb_frontend_sleep_until(&nexttime, 8000);
1767 }
1768 if (dvb_frontend_debug) {
1769 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1770 __func__, fe->dvb->num);
1771 for (i = 1; i < 10; i++)
1772 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1773 }
1774 err = 0;
1775 fepriv->state = FESTATE_DISEQC;
1776 fepriv->status = 0;
1777 }
1778 break;
1779
1780 case FE_DISEQC_RECV_SLAVE_REPLY:
1781 if (fe->ops.diseqc_recv_slave_reply)
1782 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1783 break;
1784
1785 case FE_ENABLE_HIGH_LNB_VOLTAGE:
1786 if (fe->ops.enable_high_lnb_voltage)
1787 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1788 break;
1789
1790 case FE_SET_FRONTEND: {
1791 struct dvb_frontend_tune_settings fetunesettings;
1792
1793 if(fe->dtv_property_cache.state == DTV_TUNE) {
1794 if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1795 err = -EINVAL;
1796 break;
1797 }
1798 } else {
1799 if (dvb_frontend_check_parameters(fe, parg) < 0) {
1800 err = -EINVAL;
1801 break;
1802 }
1803
1804 memcpy (&fepriv->parameters, parg,
1805 sizeof (struct dvb_frontend_parameters));
1806 dtv_property_cache_sync(fe, &fepriv->parameters);
1807 }
1808
1809 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1810 memcpy(&fetunesettings.parameters, parg,
1811 sizeof (struct dvb_frontend_parameters));
1812
1813 /* force auto frequency inversion if requested */
1814 if (dvb_force_auto_inversion) {
1815 fepriv->parameters.inversion = INVERSION_AUTO;
1816 fetunesettings.parameters.inversion = INVERSION_AUTO;
1817 }
1818 if (fe->ops.info.type == FE_OFDM) {
1819 /* without hierarchical coding code_rate_LP is irrelevant,
1820 * so we tolerate the otherwise invalid FEC_NONE setting */
1821 if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1822 fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1823 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1824 }
1825
1826 /* get frontend-specific tuning settings */
1827 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1828 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1829 fepriv->max_drift = fetunesettings.max_drift;
1830 fepriv->step_size = fetunesettings.step_size;
1831 } else {
1832 /* default values */
1833 switch(fe->ops.info.type) {
1834 case FE_QPSK:
1835 fepriv->min_delay = HZ/20;
1836 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1837 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1838 break;
1839
1840 case FE_QAM:
1841 fepriv->min_delay = HZ/20;
1842 fepriv->step_size = 0; /* no zigzag */
1843 fepriv->max_drift = 0;
1844 break;
1845
1846 case FE_OFDM:
1847 fepriv->min_delay = HZ/20;
1848 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1849 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1850 break;
1851 case FE_ATSC:
1852 fepriv->min_delay = HZ/20;
1853 fepriv->step_size = 0;
1854 fepriv->max_drift = 0;
1855 break;
1856 }
1857 }
1858 if (dvb_override_tune_delay > 0)
1859 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1860
1861 fepriv->state = FESTATE_RETUNE;
1862
1863 /* Request the search algorithm to search */
1864 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1865
1866 dvb_frontend_wakeup(fe);
1867 dvb_frontend_add_event(fe, 0);
1868 fepriv->status = 0;
1869 err = 0;
1870 break;
1871 }
1872
1873 case FE_GET_EVENT:
1874 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1875 break;
1876
1877 case FE_GET_FRONTEND:
1878 if (fe->ops.get_frontend) {
1879 memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1880 err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1881 }
1882 break;
1883
1884 case FE_SET_FRONTEND_TUNE_MODE:
1885 fepriv->tune_mode_flags = (unsigned long) parg;
1886 err = 0;
1887 break;
1888 };
1889
1890 if (fe->dvb->fe_ioctl_override) {
1891 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1892 DVB_FE_IOCTL_POST);
1893 if (cb_err < 0)
1894 return cb_err;
1895 }
1896
1897 return err;
1898 }
1899
1900
1901 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1902 {
1903 struct dvb_device *dvbdev = file->private_data;
1904 struct dvb_frontend *fe = dvbdev->priv;
1905 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1906
1907 dprintk ("%s\n", __func__);
1908
1909 poll_wait (file, &fepriv->events.wait_queue, wait);
1910
1911 if (fepriv->events.eventw != fepriv->events.eventr)
1912 return (POLLIN | POLLRDNORM | POLLPRI);
1913
1914 return 0;
1915 }
1916
1917 static int dvb_frontend_open(struct inode *inode, struct file *file)
1918 {
1919 struct dvb_device *dvbdev = file->private_data;
1920 struct dvb_frontend *fe = dvbdev->priv;
1921 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1922 struct dvb_adapter *adapter = fe->dvb;
1923 int ret;
1924
1925 dprintk ("%s\n", __func__);
1926 if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
1927 return -ENODEV;
1928
1929 if (adapter->mfe_shared) {
1930 mutex_lock (&adapter->mfe_lock);
1931
1932 if (adapter->mfe_dvbdev == NULL)
1933 adapter->mfe_dvbdev = dvbdev;
1934
1935 else if (adapter->mfe_dvbdev != dvbdev) {
1936 struct dvb_device
1937 *mfedev = adapter->mfe_dvbdev;
1938 struct dvb_frontend
1939 *mfe = mfedev->priv;
1940 struct dvb_frontend_private
1941 *mfepriv = mfe->frontend_priv;
1942 int mferetry = (dvb_mfe_wait_time << 1);
1943
1944 mutex_unlock (&adapter->mfe_lock);
1945 while (mferetry-- && (mfedev->users != -1 ||
1946 mfepriv->thread != NULL)) {
1947 if(msleep_interruptible(500)) {
1948 if(signal_pending(current))
1949 return -EINTR;
1950 }
1951 }
1952
1953 mutex_lock (&adapter->mfe_lock);
1954 if(adapter->mfe_dvbdev != dvbdev) {
1955 mfedev = adapter->mfe_dvbdev;
1956 mfe = mfedev->priv;
1957 mfepriv = mfe->frontend_priv;
1958 if (mfedev->users != -1 ||
1959 mfepriv->thread != NULL) {
1960 mutex_unlock (&adapter->mfe_lock);
1961 return -EBUSY;
1962 }
1963 adapter->mfe_dvbdev = dvbdev;
1964 }
1965 }
1966 }
1967
1968 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1969 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1970 goto err0;
1971 }
1972
1973 if ((ret = dvb_generic_open (inode, file)) < 0)
1974 goto err1;
1975
1976 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1977 /* normal tune mode when opened R/W */
1978 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1979 fepriv->tone = -1;
1980 fepriv->voltage = -1;
1981
1982 ret = dvb_frontend_start (fe);
1983 if (ret)
1984 goto err2;
1985
1986 /* empty event queue */
1987 fepriv->events.eventr = fepriv->events.eventw = 0;
1988 }
1989
1990 if (adapter->mfe_shared)
1991 mutex_unlock (&adapter->mfe_lock);
1992 return ret;
1993
1994 err2:
1995 dvb_generic_release(inode, file);
1996 err1:
1997 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1998 fe->ops.ts_bus_ctrl(fe, 0);
1999 err0:
2000 if (adapter->mfe_shared)
2001 mutex_unlock (&adapter->mfe_lock);
2002 return ret;
2003 }
2004
2005 static int dvb_frontend_release(struct inode *inode, struct file *file)
2006 {
2007 struct dvb_device *dvbdev = file->private_data;
2008 struct dvb_frontend *fe = dvbdev->priv;
2009 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2010 int ret;
2011
2012 dprintk ("%s\n", __func__);
2013
2014 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
2015 fepriv->release_jiffies = jiffies;
2016
2017 ret = dvb_generic_release (inode, file);
2018
2019 if (dvbdev->users == -1) {
2020 if (fepriv->exit != DVB_FE_NO_EXIT) {
2021 fops_put(file->f_op);
2022 file->f_op = NULL;
2023 wake_up(&dvbdev->wait_queue);
2024 }
2025 if (fe->ops.ts_bus_ctrl)
2026 fe->ops.ts_bus_ctrl(fe, 0);
2027 }
2028
2029 return ret;
2030 }
2031
2032 static const struct file_operations dvb_frontend_fops = {
2033 .owner = THIS_MODULE,
2034 .unlocked_ioctl = dvb_generic_ioctl,
2035 .poll = dvb_frontend_poll,
2036 .open = dvb_frontend_open,
2037 .release = dvb_frontend_release,
2038 .llseek = noop_llseek,
2039 };
2040
2041 int dvb_register_frontend(struct dvb_adapter* dvb,
2042 struct dvb_frontend* fe)
2043 {
2044 struct dvb_frontend_private *fepriv;
2045 static const struct dvb_device dvbdev_template = {
2046 .users = ~0,
2047 .writers = 1,
2048 .readers = (~0)-1,
2049 .fops = &dvb_frontend_fops,
2050 .kernel_ioctl = dvb_frontend_ioctl
2051 };
2052
2053 dprintk ("%s\n", __func__);
2054
2055 if (mutex_lock_interruptible(&frontend_mutex))
2056 return -ERESTARTSYS;
2057
2058 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2059 if (fe->frontend_priv == NULL) {
2060 mutex_unlock(&frontend_mutex);
2061 return -ENOMEM;
2062 }
2063 fepriv = fe->frontend_priv;
2064
2065 sema_init(&fepriv->sem, 1);
2066 init_waitqueue_head (&fepriv->wait_queue);
2067 init_waitqueue_head (&fepriv->events.wait_queue);
2068 mutex_init(&fepriv->events.mtx);
2069 fe->dvb = dvb;
2070 fepriv->inversion = INVERSION_OFF;
2071
2072 printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2073 fe->dvb->num,
2074 fe->id,
2075 fe->ops.info.name);
2076
2077 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2078 fe, DVB_DEVICE_FRONTEND);
2079
2080 mutex_unlock(&frontend_mutex);
2081 return 0;
2082 }
2083 EXPORT_SYMBOL(dvb_register_frontend);
2084
2085 int dvb_unregister_frontend(struct dvb_frontend* fe)
2086 {
2087 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2088 dprintk ("%s\n", __func__);
2089
2090 mutex_lock(&frontend_mutex);
2091 dvb_frontend_stop (fe);
2092 mutex_unlock(&frontend_mutex);
2093
2094 if (fepriv->dvbdev->users < -1)
2095 wait_event(fepriv->dvbdev->wait_queue,
2096 fepriv->dvbdev->users==-1);
2097
2098 mutex_lock(&frontend_mutex);
2099 dvb_unregister_device (fepriv->dvbdev);
2100
2101 /* fe is invalid now */
2102 kfree(fepriv);
2103 mutex_unlock(&frontend_mutex);
2104 return 0;
2105 }
2106 EXPORT_SYMBOL(dvb_unregister_frontend);
2107
2108 #ifdef CONFIG_MEDIA_ATTACH
2109 void dvb_frontend_detach(struct dvb_frontend* fe)
2110 {
2111 void *ptr;
2112
2113 if (fe->ops.release_sec) {
2114 fe->ops.release_sec(fe);
2115 symbol_put_addr(fe->ops.release_sec);
2116 }
2117 if (fe->ops.tuner_ops.release) {
2118 fe->ops.tuner_ops.release(fe);
2119 symbol_put_addr(fe->ops.tuner_ops.release);
2120 }
2121 if (fe->ops.analog_ops.release) {
2122 fe->ops.analog_ops.release(fe);
2123 symbol_put_addr(fe->ops.analog_ops.release);
2124 }
2125 ptr = (void*)fe->ops.release;
2126 if (ptr) {
2127 fe->ops.release(fe);
2128 symbol_put_addr(ptr);
2129 }
2130 }
2131 #else
2132 void dvb_frontend_detach(struct dvb_frontend* fe)
2133 {
2134 if (fe->ops.release_sec)
2135 fe->ops.release_sec(fe);
2136 if (fe->ops.tuner_ops.release)
2137 fe->ops.tuner_ops.release(fe);
2138 if (fe->ops.analog_ops.release)
2139 fe->ops.analog_ops.release(fe);
2140 if (fe->ops.release)
2141 fe->ops.release(fe);
2142 }
2143 #endif
2144 EXPORT_SYMBOL(dvb_frontend_detach);
Linux kernel - Deliverables
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