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initial commit with v2.6.32.60
[linux-2.6.32.60-moxart.git] / drivers / media / dvb / dvb-core / dvb_frontend.c
blob98082416aa52aec23e14ec242a6416f02ae443c3
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 static DEFINE_MUTEX(frontend_mutex);
99
100 struct dvb_frontend_private {
101
102 /* thread/frontend values */
103 struct dvb_device *dvbdev;
104 struct dvb_frontend_parameters parameters;
105 struct dvb_fe_events events;
106 struct semaphore sem;
107 struct list_head list_head;
108 wait_queue_head_t wait_queue;
109 struct task_struct *thread;
110 unsigned long release_jiffies;
111 unsigned int exit;
112 unsigned int wakeup;
113 fe_status_t status;
114 unsigned long tune_mode_flags;
115 unsigned int delay;
116 unsigned int reinitialise;
117 int tone;
118 int voltage;
119
120 /* swzigzag values */
121 unsigned int state;
122 unsigned int bending;
123 int lnb_drift;
124 unsigned int inversion;
125 unsigned int auto_step;
126 unsigned int auto_sub_step;
127 unsigned int started_auto_step;
128 unsigned int min_delay;
129 unsigned int max_drift;
130 unsigned int step_size;
131 int quality;
132 unsigned int check_wrapped;
133 enum dvbfe_search algo_status;
134 };
135
136 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
137
138 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
139 {
140 struct dvb_frontend_private *fepriv = fe->frontend_priv;
141 struct dvb_fe_events *events = &fepriv->events;
142 struct dvb_frontend_event *e;
143 int wp;
144
145 dprintk ("%s\n", __func__);
146
147 if (mutex_lock_interruptible (&events->mtx))
148 return;
149
150 wp = (events->eventw + 1) % MAX_EVENT;
151
152 if (wp == events->eventr) {
153 events->overflow = 1;
154 events->eventr = (events->eventr + 1) % MAX_EVENT;
155 }
156
157 e = &events->events[events->eventw];
158
159 memcpy (&e->parameters, &fepriv->parameters,
160 sizeof (struct dvb_frontend_parameters));
161
162 if (status & FE_HAS_LOCK)
163 if (fe->ops.get_frontend)
164 fe->ops.get_frontend(fe, &e->parameters);
165
166 events->eventw = wp;
167
168 mutex_unlock(&events->mtx);
169
170 e->status = status;
171
172 wake_up_interruptible (&events->wait_queue);
173 }
174
175 static int dvb_frontend_get_event(struct dvb_frontend *fe,
176 struct dvb_frontend_event *event, int flags)
177 {
178 struct dvb_frontend_private *fepriv = fe->frontend_priv;
179 struct dvb_fe_events *events = &fepriv->events;
180
181 dprintk ("%s\n", __func__);
182
183 if (events->overflow) {
184 events->overflow = 0;
185 return -EOVERFLOW;
186 }
187
188 if (events->eventw == events->eventr) {
189 int ret;
190
191 if (flags & O_NONBLOCK)
192 return -EWOULDBLOCK;
193
194 up(&fepriv->sem);
195
196 ret = wait_event_interruptible (events->wait_queue,
197 events->eventw != events->eventr);
198
199 if (down_interruptible (&fepriv->sem))
200 return -ERESTARTSYS;
201
202 if (ret < 0)
203 return ret;
204 }
205
206 if (mutex_lock_interruptible (&events->mtx))
207 return -ERESTARTSYS;
208
209 memcpy (event, &events->events[events->eventr],
210 sizeof(struct dvb_frontend_event));
211
212 events->eventr = (events->eventr + 1) % MAX_EVENT;
213
214 mutex_unlock(&events->mtx);
215
216 return 0;
217 }
218
219 static void dvb_frontend_init(struct dvb_frontend *fe)
220 {
221 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
222 fe->dvb->num,
223 fe->id,
224 fe->ops.info.name);
225
226 if (fe->ops.init)
227 fe->ops.init(fe);
228 if (fe->ops.tuner_ops.init) {
229 if (fe->ops.i2c_gate_ctrl)
230 fe->ops.i2c_gate_ctrl(fe, 1);
231 fe->ops.tuner_ops.init(fe);
232 if (fe->ops.i2c_gate_ctrl)
233 fe->ops.i2c_gate_ctrl(fe, 0);
234 }
235 }
236
237 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
238 {
239 struct dvb_frontend_private *fepriv = fe->frontend_priv;
240
241 fepriv->reinitialise = 1;
242 dvb_frontend_wakeup(fe);
243 }
244 EXPORT_SYMBOL(dvb_frontend_reinitialise);
245
246 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
247 {
248 int q2;
249
250 dprintk ("%s\n", __func__);
251
252 if (locked)
253 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
254 else
255 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
256
257 q2 = fepriv->quality - 128;
258 q2 *= q2;
259
260 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
261 }
262
263 /**
264 * Performs automatic twiddling of frontend parameters.
265 *
266 * @param fe The frontend concerned.
267 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
268 * @returns Number of complete iterations that have been performed.
269 */
270 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
271 {
272 int autoinversion;
273 int ready = 0;
274 int fe_set_err = 0;
275 struct dvb_frontend_private *fepriv = fe->frontend_priv;
276 int original_inversion = fepriv->parameters.inversion;
277 u32 original_frequency = fepriv->parameters.frequency;
278
279 /* are we using autoinversion? */
280 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
281 (fepriv->parameters.inversion == INVERSION_AUTO));
282
283 /* setup parameters correctly */
284 while(!ready) {
285 /* calculate the lnb_drift */
286 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
287
288 /* wrap the auto_step if we've exceeded the maximum drift */
289 if (fepriv->lnb_drift > fepriv->max_drift) {
290 fepriv->auto_step = 0;
291 fepriv->auto_sub_step = 0;
292 fepriv->lnb_drift = 0;
293 }
294
295 /* perform inversion and +/- zigzag */
296 switch(fepriv->auto_sub_step) {
297 case 0:
298 /* try with the current inversion and current drift setting */
299 ready = 1;
300 break;
301
302 case 1:
303 if (!autoinversion) break;
304
305 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
306 ready = 1;
307 break;
308
309 case 2:
310 if (fepriv->lnb_drift == 0) break;
311
312 fepriv->lnb_drift = -fepriv->lnb_drift;
313 ready = 1;
314 break;
315
316 case 3:
317 if (fepriv->lnb_drift == 0) break;
318 if (!autoinversion) break;
319
320 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
321 fepriv->lnb_drift = -fepriv->lnb_drift;
322 ready = 1;
323 break;
324
325 default:
326 fepriv->auto_step++;
327 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
328 break;
329 }
330
331 if (!ready) fepriv->auto_sub_step++;
332 }
333
334 /* if this attempt would hit where we started, indicate a complete
335 * iteration has occurred */
336 if ((fepriv->auto_step == fepriv->started_auto_step) &&
337 (fepriv->auto_sub_step == 0) && check_wrapped) {
338 return 1;
339 }
340
341 dprintk("%s: drift:%i inversion:%i auto_step:%i "
342 "auto_sub_step:%i started_auto_step:%i\n",
343 __func__, fepriv->lnb_drift, fepriv->inversion,
344 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
345
346 /* set the frontend itself */
347 fepriv->parameters.frequency += fepriv->lnb_drift;
348 if (autoinversion)
349 fepriv->parameters.inversion = fepriv->inversion;
350 if (fe->ops.set_frontend)
351 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
352 if (fe_set_err < 0) {
353 fepriv->state = FESTATE_ERROR;
354 return fe_set_err;
355 }
356
357 fepriv->parameters.frequency = original_frequency;
358 fepriv->parameters.inversion = original_inversion;
359
360 fepriv->auto_sub_step++;
361 return 0;
362 }
363
364 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
365 {
366 fe_status_t s = 0;
367 int retval = 0;
368 struct dvb_frontend_private *fepriv = fe->frontend_priv;
369
370 /* if we've got no parameters, just keep idling */
371 if (fepriv->state & FESTATE_IDLE) {
372 fepriv->delay = 3*HZ;
373 fepriv->quality = 0;
374 return;
375 }
376
377 /* in SCAN mode, we just set the frontend when asked and leave it alone */
378 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
379 if (fepriv->state & FESTATE_RETUNE) {
380 if (fe->ops.set_frontend)
381 retval = fe->ops.set_frontend(fe,
382 &fepriv->parameters);
383 if (retval < 0)
384 fepriv->state = FESTATE_ERROR;
385 else
386 fepriv->state = FESTATE_TUNED;
387 }
388 fepriv->delay = 3*HZ;
389 fepriv->quality = 0;
390 return;
391 }
392
393 /* get the frontend status */
394 if (fepriv->state & FESTATE_RETUNE) {
395 s = 0;
396 } else {
397 if (fe->ops.read_status)
398 fe->ops.read_status(fe, &s);
399 if (s != fepriv->status) {
400 dvb_frontend_add_event(fe, s);
401 fepriv->status = s;
402 }
403 }
404
405 /* if we're not tuned, and we have a lock, move to the TUNED state */
406 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
407 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
408 fepriv->state = FESTATE_TUNED;
409
410 /* if we're tuned, then we have determined the correct inversion */
411 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
412 (fepriv->parameters.inversion == INVERSION_AUTO)) {
413 fepriv->parameters.inversion = fepriv->inversion;
414 }
415 return;
416 }
417
418 /* if we are tuned already, check we're still locked */
419 if (fepriv->state & FESTATE_TUNED) {
420 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
421
422 /* we're tuned, and the lock is still good... */
423 if (s & FE_HAS_LOCK) {
424 return;
425 } else { /* if we _WERE_ tuned, but now don't have a lock */
426 fepriv->state = FESTATE_ZIGZAG_FAST;
427 fepriv->started_auto_step = fepriv->auto_step;
428 fepriv->check_wrapped = 0;
429 }
430 }
431
432 /* don't actually do anything if we're in the LOSTLOCK state,
433 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
434 if ((fepriv->state & FESTATE_LOSTLOCK) &&
435 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
436 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
437 return;
438 }
439
440 /* don't do anything if we're in the DISEQC state, since this
441 * might be someone with a motorized dish controlled by DISEQC.
442 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
443 if (fepriv->state & FESTATE_DISEQC) {
444 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
445 return;
446 }
447
448 /* if we're in the RETUNE state, set everything up for a brand
449 * new scan, keeping the current inversion setting, as the next
450 * tune is _very_ likely to require the same */
451 if (fepriv->state & FESTATE_RETUNE) {
452 fepriv->lnb_drift = 0;
453 fepriv->auto_step = 0;
454 fepriv->auto_sub_step = 0;
455 fepriv->started_auto_step = 0;
456 fepriv->check_wrapped = 0;
457 }
458
459 /* fast zigzag. */
460 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
461 fepriv->delay = fepriv->min_delay;
462
463 /* peform a tune */
464 retval = dvb_frontend_swzigzag_autotune(fe,
465 fepriv->check_wrapped);
466 if (retval < 0) {
467 return;
468 } else if (retval) {
469 /* OK, if we've run out of trials at the fast speed.
470 * Drop back to slow for the _next_ attempt */
471 fepriv->state = FESTATE_SEARCHING_SLOW;
472 fepriv->started_auto_step = fepriv->auto_step;
473 return;
474 }
475 fepriv->check_wrapped = 1;
476
477 /* if we've just retuned, enter the ZIGZAG_FAST state.
478 * This ensures we cannot return from an
479 * FE_SET_FRONTEND ioctl before the first frontend tune
480 * occurs */
481 if (fepriv->state & FESTATE_RETUNE) {
482 fepriv->state = FESTATE_TUNING_FAST;
483 }
484 }
485
486 /* slow zigzag */
487 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
488 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
489
490 /* Note: don't bother checking for wrapping; we stay in this
491 * state until we get a lock */
492 dvb_frontend_swzigzag_autotune(fe, 0);
493 }
494 }
495
496 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
497 {
498 struct dvb_frontend_private *fepriv = fe->frontend_priv;
499
500 if (fepriv->exit)
501 return 1;
502
503 if (fepriv->dvbdev->writers == 1)
504 if (time_after(jiffies, fepriv->release_jiffies +
505 dvb_shutdown_timeout * HZ))
506 return 1;
507
508 return 0;
509 }
510
511 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
512 {
513 struct dvb_frontend_private *fepriv = fe->frontend_priv;
514
515 if (fepriv->wakeup) {
516 fepriv->wakeup = 0;
517 return 1;
518 }
519 return dvb_frontend_is_exiting(fe);
520 }
521
522 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
523 {
524 struct dvb_frontend_private *fepriv = fe->frontend_priv;
525
526 fepriv->wakeup = 1;
527 wake_up_interruptible(&fepriv->wait_queue);
528 }
529
530 static int dvb_frontend_thread(void *data)
531 {
532 struct dvb_frontend *fe = data;
533 struct dvb_frontend_private *fepriv = fe->frontend_priv;
534 unsigned long timeout;
535 fe_status_t s;
536 enum dvbfe_algo algo;
537
538 struct dvb_frontend_parameters *params;
539
540 dprintk("%s\n", __func__);
541
542 fepriv->check_wrapped = 0;
543 fepriv->quality = 0;
544 fepriv->delay = 3*HZ;
545 fepriv->status = 0;
546 fepriv->wakeup = 0;
547 fepriv->reinitialise = 0;
548
549 dvb_frontend_init(fe);
550
551 set_freezable();
552 while (1) {
553 up(&fepriv->sem); /* is locked when we enter the thread... */
554 restart:
555 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
556 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
557 || freezing(current),
558 fepriv->delay);
559
560 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
561 /* got signal or quitting */
562 fepriv->exit = 1;
563 break;
564 }
565
566 if (try_to_freeze())
567 goto restart;
568
569 if (down_interruptible(&fepriv->sem))
570 break;
571
572 if (fepriv->reinitialise) {
573 dvb_frontend_init(fe);
574 if (fepriv->tone != -1) {
575 fe->ops.set_tone(fe, fepriv->tone);
576 }
577 if (fepriv->voltage != -1) {
578 fe->ops.set_voltage(fe, fepriv->voltage);
579 }
580 fepriv->reinitialise = 0;
581 }
582
583 /* do an iteration of the tuning loop */
584 if (fe->ops.get_frontend_algo) {
585 algo = fe->ops.get_frontend_algo(fe);
586 switch (algo) {
587 case DVBFE_ALGO_HW:
588 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
589 params = NULL; /* have we been asked to RETUNE ? */
590
591 if (fepriv->state & FESTATE_RETUNE) {
592 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
593 params = &fepriv->parameters;
594 fepriv->state = FESTATE_TUNED;
595 }
596
597 if (fe->ops.tune)
598 fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
599
600 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
601 dprintk("%s: state changed, adding current state\n", __func__);
602 dvb_frontend_add_event(fe, s);
603 fepriv->status = s;
604 }
605 break;
606 case DVBFE_ALGO_SW:
607 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
608 dvb_frontend_swzigzag(fe);
609 break;
610 case DVBFE_ALGO_CUSTOM:
611 params = NULL; /* have we been asked to RETUNE ? */
612 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
613 if (fepriv->state & FESTATE_RETUNE) {
614 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
615 params = &fepriv->parameters;
616 fepriv->state = FESTATE_TUNED;
617 }
618 /* Case where we are going to search for a carrier
619 * User asked us to retune again for some reason, possibly
620 * requesting a search with a new set of parameters
621 */
622 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
623 if (fe->ops.search) {
624 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
625 /* We did do a search as was requested, the flags are
626 * now unset as well and has the flags wrt to search.
627 */
628 } else {
629 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
630 }
631 }
632 /* Track the carrier if the search was successful */
633 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
634 if (fe->ops.track)
635 fe->ops.track(fe, &fepriv->parameters);
636 } else {
637 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
638 fepriv->delay = HZ / 2;
639 }
640 fe->ops.read_status(fe, &s);
641 if (s != fepriv->status) {
642 dvb_frontend_add_event(fe, s); /* update event list */
643 fepriv->status = s;
644 if (!(s & FE_HAS_LOCK)) {
645 fepriv->delay = HZ / 10;
646 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
647 } else {
648 fepriv->delay = 60 * HZ;
649 }
650 }
651 break;
652 default:
653 dprintk("%s: UNDEFINED ALGO !\n", __func__);
654 break;
655 }
656 } else {
657 dvb_frontend_swzigzag(fe);
658 }
659 }
660
661 if (dvb_powerdown_on_sleep) {
662 if (fe->ops.set_voltage)
663 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
664 if (fe->ops.tuner_ops.sleep) {
665 if (fe->ops.i2c_gate_ctrl)
666 fe->ops.i2c_gate_ctrl(fe, 1);
667 fe->ops.tuner_ops.sleep(fe);
668 if (fe->ops.i2c_gate_ctrl)
669 fe->ops.i2c_gate_ctrl(fe, 0);
670 }
671 if (fe->ops.sleep)
672 fe->ops.sleep(fe);
673 }
674
675 fepriv->thread = NULL;
676 fepriv->exit = 0;
677 mb();
678
679 dvb_frontend_wakeup(fe);
680 return 0;
681 }
682
683 static void dvb_frontend_stop(struct dvb_frontend *fe)
684 {
685 struct dvb_frontend_private *fepriv = fe->frontend_priv;
686
687 dprintk ("%s\n", __func__);
688
689 fepriv->exit = 1;
690 mb();
691
692 if (!fepriv->thread)
693 return;
694
695 kthread_stop(fepriv->thread);
696
697 init_MUTEX (&fepriv->sem);
698 fepriv->state = FESTATE_IDLE;
699
700 /* paranoia check in case a signal arrived */
701 if (fepriv->thread)
702 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
703 fepriv->thread);
704 }
705
706 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
707 {
708 return ((curtime.tv_usec < lasttime.tv_usec) ?
709 1000000 - lasttime.tv_usec + curtime.tv_usec :
710 curtime.tv_usec - lasttime.tv_usec);
711 }
712 EXPORT_SYMBOL(timeval_usec_diff);
713
714 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
715 {
716 curtime->tv_usec += add_usec;
717 if (curtime->tv_usec >= 1000000) {
718 curtime->tv_usec -= 1000000;
719 curtime->tv_sec++;
720 }
721 }
722
723 /*
724 * Sleep until gettimeofday() > waketime + add_usec
725 * This needs to be as precise as possible, but as the delay is
726 * usually between 2ms and 32ms, it is done using a scheduled msleep
727 * followed by usleep (normally a busy-wait loop) for the remainder
728 */
729 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
730 {
731 struct timeval lasttime;
732 s32 delta, newdelta;
733
734 timeval_usec_add(waketime, add_usec);
735
736 do_gettimeofday(&lasttime);
737 delta = timeval_usec_diff(lasttime, *waketime);
738 if (delta > 2500) {
739 msleep((delta - 1500) / 1000);
740 do_gettimeofday(&lasttime);
741 newdelta = timeval_usec_diff(lasttime, *waketime);
742 delta = (newdelta > delta) ? 0 : newdelta;
743 }
744 if (delta > 0)
745 udelay(delta);
746 }
747 EXPORT_SYMBOL(dvb_frontend_sleep_until);
748
749 static int dvb_frontend_start(struct dvb_frontend *fe)
750 {
751 int ret;
752 struct dvb_frontend_private *fepriv = fe->frontend_priv;
753 struct task_struct *fe_thread;
754
755 dprintk ("%s\n", __func__);
756
757 if (fepriv->thread) {
758 if (!fepriv->exit)
759 return 0;
760 else
761 dvb_frontend_stop (fe);
762 }
763
764 if (signal_pending(current))
765 return -EINTR;
766 if (down_interruptible (&fepriv->sem))
767 return -EINTR;
768
769 fepriv->state = FESTATE_IDLE;
770 fepriv->exit = 0;
771 fepriv->thread = NULL;
772 mb();
773
774 fe_thread = kthread_run(dvb_frontend_thread, fe,
775 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
776 if (IS_ERR(fe_thread)) {
777 ret = PTR_ERR(fe_thread);
778 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
779 up(&fepriv->sem);
780 return ret;
781 }
782 fepriv->thread = fe_thread;
783 return 0;
784 }
785
786 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
787 u32 *freq_min, u32 *freq_max)
788 {
789 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
790
791 if (fe->ops.info.frequency_max == 0)
792 *freq_max = fe->ops.tuner_ops.info.frequency_max;
793 else if (fe->ops.tuner_ops.info.frequency_max == 0)
794 *freq_max = fe->ops.info.frequency_max;
795 else
796 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
797
798 if (*freq_min == 0 || *freq_max == 0)
799 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
800 fe->dvb->num,fe->id);
801 }
802
803 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
804 struct dvb_frontend_parameters *parms)
805 {
806 u32 freq_min;
807 u32 freq_max;
808
809 /* range check: frequency */
810 dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
811 if ((freq_min && parms->frequency < freq_min) ||
812 (freq_max && parms->frequency > freq_max)) {
813 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
814 fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
815 return -EINVAL;
816 }
817
818 /* range check: symbol rate */
819 if (fe->ops.info.type == FE_QPSK) {
820 if ((fe->ops.info.symbol_rate_min &&
821 parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
822 (fe->ops.info.symbol_rate_max &&
823 parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
824 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
825 fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
826 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
827 return -EINVAL;
828 }
829
830 } else if (fe->ops.info.type == FE_QAM) {
831 if ((fe->ops.info.symbol_rate_min &&
832 parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
833 (fe->ops.info.symbol_rate_max &&
834 parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
835 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
836 fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
837 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
838 return -EINVAL;
839 }
840 }
841
842 /* check for supported modulation */
843 if (fe->ops.info.type == FE_QAM &&
844 (parms->u.qam.modulation > QAM_AUTO ||
845 !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
846 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
847 fe->dvb->num, fe->id, parms->u.qam.modulation);
848 return -EINVAL;
849 }
850
851 return 0;
852 }
853
854 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
855 {
856 int i;
857
858 memset(&(fe->dtv_property_cache), 0,
859 sizeof(struct dtv_frontend_properties));
860
861 fe->dtv_property_cache.state = DTV_CLEAR;
862 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
863 fe->dtv_property_cache.inversion = INVERSION_AUTO;
864 fe->dtv_property_cache.fec_inner = FEC_AUTO;
865 fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO;
866 fe->dtv_property_cache.bandwidth_hz = BANDWIDTH_AUTO;
867 fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO;
868 fe->dtv_property_cache.hierarchy = HIERARCHY_AUTO;
869 fe->dtv_property_cache.symbol_rate = QAM_AUTO;
870 fe->dtv_property_cache.code_rate_HP = FEC_AUTO;
871 fe->dtv_property_cache.code_rate_LP = FEC_AUTO;
872
873 fe->dtv_property_cache.isdbt_partial_reception = -1;
874 fe->dtv_property_cache.isdbt_sb_mode = -1;
875 fe->dtv_property_cache.isdbt_sb_subchannel = -1;
876 fe->dtv_property_cache.isdbt_sb_segment_idx = -1;
877 fe->dtv_property_cache.isdbt_sb_segment_count = -1;
878 fe->dtv_property_cache.isdbt_layer_enabled = 0x7;
879 for (i = 0; i < 3; i++) {
880 fe->dtv_property_cache.layer[i].fec = FEC_AUTO;
881 fe->dtv_property_cache.layer[i].modulation = QAM_AUTO;
882 fe->dtv_property_cache.layer[i].interleaving = -1;
883 fe->dtv_property_cache.layer[i].segment_count = -1;
884 }
885
886 return 0;
887 }
888
889 #define _DTV_CMD(n, s, b) \
890 [n] = { \
891 .name = #n, \
892 .cmd = n, \
893 .set = s,\
894 .buffer = b \
895 }
896
897 static struct dtv_cmds_h dtv_cmds[] = {
898 [DTV_TUNE] = {
899 .name = "DTV_TUNE",
900 .cmd = DTV_TUNE,
901 .set = 1,
902 },
903 [DTV_CLEAR] = {
904 .name = "DTV_CLEAR",
905 .cmd = DTV_CLEAR,
906 .set = 1,
907 },
908
909 /* Set */
910 [DTV_FREQUENCY] = {
911 .name = "DTV_FREQUENCY",
912 .cmd = DTV_FREQUENCY,
913 .set = 1,
914 },
915 [DTV_BANDWIDTH_HZ] = {
916 .name = "DTV_BANDWIDTH_HZ",
917 .cmd = DTV_BANDWIDTH_HZ,
918 .set = 1,
919 },
920 [DTV_MODULATION] = {
921 .name = "DTV_MODULATION",
922 .cmd = DTV_MODULATION,
923 .set = 1,
924 },
925 [DTV_INVERSION] = {
926 .name = "DTV_INVERSION",
927 .cmd = DTV_INVERSION,
928 .set = 1,
929 },
930 [DTV_DISEQC_MASTER] = {
931 .name = "DTV_DISEQC_MASTER",
932 .cmd = DTV_DISEQC_MASTER,
933 .set = 1,
934 .buffer = 1,
935 },
936 [DTV_SYMBOL_RATE] = {
937 .name = "DTV_SYMBOL_RATE",
938 .cmd = DTV_SYMBOL_RATE,
939 .set = 1,
940 },
941 [DTV_INNER_FEC] = {
942 .name = "DTV_INNER_FEC",
943 .cmd = DTV_INNER_FEC,
944 .set = 1,
945 },
946 [DTV_VOLTAGE] = {
947 .name = "DTV_VOLTAGE",
948 .cmd = DTV_VOLTAGE,
949 .set = 1,
950 },
951 [DTV_TONE] = {
952 .name = "DTV_TONE",
953 .cmd = DTV_TONE,
954 .set = 1,
955 },
956 [DTV_PILOT] = {
957 .name = "DTV_PILOT",
958 .cmd = DTV_PILOT,
959 .set = 1,
960 },
961 [DTV_ROLLOFF] = {
962 .name = "DTV_ROLLOFF",
963 .cmd = DTV_ROLLOFF,
964 .set = 1,
965 },
966 [DTV_DELIVERY_SYSTEM] = {
967 .name = "DTV_DELIVERY_SYSTEM",
968 .cmd = DTV_DELIVERY_SYSTEM,
969 .set = 1,
970 },
971 [DTV_HIERARCHY] = {
972 .name = "DTV_HIERARCHY",
973 .cmd = DTV_HIERARCHY,
974 .set = 1,
975 },
976 [DTV_CODE_RATE_HP] = {
977 .name = "DTV_CODE_RATE_HP",
978 .cmd = DTV_CODE_RATE_HP,
979 .set = 1,
980 },
981 [DTV_CODE_RATE_LP] = {
982 .name = "DTV_CODE_RATE_LP",
983 .cmd = DTV_CODE_RATE_LP,
984 .set = 1,
985 },
986 [DTV_GUARD_INTERVAL] = {
987 .name = "DTV_GUARD_INTERVAL",
988 .cmd = DTV_GUARD_INTERVAL,
989 .set = 1,
990 },
991 [DTV_TRANSMISSION_MODE] = {
992 .name = "DTV_TRANSMISSION_MODE",
993 .cmd = DTV_TRANSMISSION_MODE,
994 .set = 1,
995 },
996
997 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
998 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
999 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1000 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1001 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1002 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1003 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1004 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1005 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1006 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1007 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1008 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1009 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1010 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1011 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1012 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1013 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1014 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1015
1016 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 0, 0),
1017 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 0, 0),
1018 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 0, 0),
1019 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 0, 0),
1020 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 0, 0),
1021 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 0, 0),
1022 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 0, 0),
1023 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 0, 0),
1024 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 0, 0),
1025 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 0, 0),
1026 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 0, 0),
1027 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 0, 0),
1028 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 0, 0),
1029 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 0, 0),
1030 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 0, 0),
1031 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 0, 0),
1032 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 0, 0),
1033 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 0, 0),
1034
1035 _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
1036
1037 /* Get */
1038 [DTV_DISEQC_SLAVE_REPLY] = {
1039 .name = "DTV_DISEQC_SLAVE_REPLY",
1040 .cmd = DTV_DISEQC_SLAVE_REPLY,
1041 .set = 0,
1042 .buffer = 1,
1043 },
1044
1045 [DTV_API_VERSION] = {
1046 .name = "DTV_API_VERSION",
1047 .cmd = DTV_API_VERSION,
1048 .set = 0,
1049 },
1050 [DTV_CODE_RATE_HP] = {
1051 .name = "DTV_CODE_RATE_HP",
1052 .cmd = DTV_CODE_RATE_HP,
1053 .set = 0,
1054 },
1055 [DTV_CODE_RATE_LP] = {
1056 .name = "DTV_CODE_RATE_LP",
1057 .cmd = DTV_CODE_RATE_LP,
1058 .set = 0,
1059 },
1060 [DTV_GUARD_INTERVAL] = {
1061 .name = "DTV_GUARD_INTERVAL",
1062 .cmd = DTV_GUARD_INTERVAL,
1063 .set = 0,
1064 },
1065 [DTV_TRANSMISSION_MODE] = {
1066 .name = "DTV_TRANSMISSION_MODE",
1067 .cmd = DTV_TRANSMISSION_MODE,
1068 .set = 0,
1069 },
1070 [DTV_HIERARCHY] = {
1071 .name = "DTV_HIERARCHY",
1072 .cmd = DTV_HIERARCHY,
1073 .set = 0,
1074 },
1075 };
1076
1077 static void dtv_property_dump(struct dtv_property *tvp)
1078 {
1079 int i;
1080
1081 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1082 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1083 __func__, tvp->cmd);
1084 return;
1085 }
1086
1087 dprintk("%s() tvp.cmd = 0x%08x (%s)\n"
1088 ,__func__
1089 ,tvp->cmd
1090 ,dtv_cmds[ tvp->cmd ].name);
1091
1092 if(dtv_cmds[ tvp->cmd ].buffer) {
1093
1094 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1095 ,__func__
1096 ,tvp->u.buffer.len);
1097
1098 for(i = 0; i < tvp->u.buffer.len; i++)
1099 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1100 ,__func__
1101 ,i
1102 ,tvp->u.buffer.data[i]);
1103
1104 } else
1105 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1106 }
1107
1108 static int is_legacy_delivery_system(fe_delivery_system_t s)
1109 {
1110 if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1111 (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1112 (s == SYS_ATSC))
1113 return 1;
1114
1115 return 0;
1116 }
1117
1118 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1119 * drivers can use a single set_frontend tuning function, regardless of whether
1120 * it's being used for the legacy or new API, reducing code and complexity.
1121 */
1122 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1123 struct dvb_frontend_parameters *p)
1124 {
1125 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1126
1127 c->frequency = p->frequency;
1128 c->inversion = p->inversion;
1129
1130 switch (fe->ops.info.type) {
1131 case FE_QPSK:
1132 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1133 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1134 c->symbol_rate = p->u.qpsk.symbol_rate;
1135 c->fec_inner = p->u.qpsk.fec_inner;
1136 c->delivery_system = SYS_DVBS;
1137 break;
1138 case FE_QAM:
1139 c->symbol_rate = p->u.qam.symbol_rate;
1140 c->fec_inner = p->u.qam.fec_inner;
1141 c->modulation = p->u.qam.modulation;
1142 c->delivery_system = SYS_DVBC_ANNEX_AC;
1143 break;
1144 case FE_OFDM:
1145 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1146 c->bandwidth_hz = 6000000;
1147 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1148 c->bandwidth_hz = 7000000;
1149 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1150 c->bandwidth_hz = 8000000;
1151 else
1152 /* Including BANDWIDTH_AUTO */
1153 c->bandwidth_hz = 0;
1154 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1155 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1156 c->modulation = p->u.ofdm.constellation;
1157 c->transmission_mode = p->u.ofdm.transmission_mode;
1158 c->guard_interval = p->u.ofdm.guard_interval;
1159 c->hierarchy = p->u.ofdm.hierarchy_information;
1160 c->delivery_system = SYS_DVBT;
1161 break;
1162 case FE_ATSC:
1163 c->modulation = p->u.vsb.modulation;
1164 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1165 c->delivery_system = SYS_ATSC;
1166 else
1167 c->delivery_system = SYS_DVBC_ANNEX_B;
1168 break;
1169 }
1170 }
1171
1172 /* Ensure the cached values are set correctly in the frontend
1173 * legacy tuning structures, for the advanced tuning API.
1174 */
1175 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1176 {
1177 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1178 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1179 struct dvb_frontend_parameters *p = &fepriv->parameters;
1180
1181 p->frequency = c->frequency;
1182 p->inversion = c->inversion;
1183
1184 switch (fe->ops.info.type) {
1185 case FE_QPSK:
1186 dprintk("%s() Preparing QPSK req\n", __func__);
1187 p->u.qpsk.symbol_rate = c->symbol_rate;
1188 p->u.qpsk.fec_inner = c->fec_inner;
1189 c->delivery_system = SYS_DVBS;
1190 break;
1191 case FE_QAM:
1192 dprintk("%s() Preparing QAM req\n", __func__);
1193 p->u.qam.symbol_rate = c->symbol_rate;
1194 p->u.qam.fec_inner = c->fec_inner;
1195 p->u.qam.modulation = c->modulation;
1196 c->delivery_system = SYS_DVBC_ANNEX_AC;
1197 break;
1198 case FE_OFDM:
1199 dprintk("%s() Preparing OFDM req\n", __func__);
1200 if (c->bandwidth_hz == 6000000)
1201 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1202 else if (c->bandwidth_hz == 7000000)
1203 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1204 else if (c->bandwidth_hz == 8000000)
1205 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1206 else
1207 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1208 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1209 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1210 p->u.ofdm.constellation = c->modulation;
1211 p->u.ofdm.transmission_mode = c->transmission_mode;
1212 p->u.ofdm.guard_interval = c->guard_interval;
1213 p->u.ofdm.hierarchy_information = c->hierarchy;
1214 c->delivery_system = SYS_DVBT;
1215 break;
1216 case FE_ATSC:
1217 dprintk("%s() Preparing VSB req\n", __func__);
1218 p->u.vsb.modulation = c->modulation;
1219 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1220 c->delivery_system = SYS_ATSC;
1221 else
1222 c->delivery_system = SYS_DVBC_ANNEX_B;
1223 break;
1224 }
1225 }
1226
1227 /* Ensure the cached values are set correctly in the frontend
1228 * legacy tuning structures, for the legacy tuning API.
1229 */
1230 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1231 {
1232 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1233 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1234 struct dvb_frontend_parameters *p = &fepriv->parameters;
1235
1236 p->frequency = c->frequency;
1237 p->inversion = c->inversion;
1238
1239 switch(c->modulation) {
1240 case PSK_8:
1241 case APSK_16:
1242 case APSK_32:
1243 case QPSK:
1244 p->u.qpsk.symbol_rate = c->symbol_rate;
1245 p->u.qpsk.fec_inner = c->fec_inner;
1246 break;
1247 default:
1248 break;
1249 }
1250
1251 if(c->delivery_system == SYS_ISDBT) {
1252 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1253 p->frequency = c->frequency;
1254 p->inversion = c->inversion;
1255 p->u.ofdm.constellation = QAM_AUTO;
1256 p->u.ofdm.code_rate_HP = FEC_AUTO;
1257 p->u.ofdm.code_rate_LP = FEC_AUTO;
1258 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1259 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1260 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1261 if (c->bandwidth_hz == 8000000)
1262 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1263 else if (c->bandwidth_hz == 7000000)
1264 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1265 else if (c->bandwidth_hz == 6000000)
1266 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1267 else
1268 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1269 }
1270 }
1271
1272 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1273 {
1274 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1275
1276 /* For legacy delivery systems we don't need the delivery_system to
1277 * be specified, but we populate the older structures from the cache
1278 * so we can call set_frontend on older drivers.
1279 */
1280 if(is_legacy_delivery_system(c->delivery_system)) {
1281
1282 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1283 dtv_property_legacy_params_sync(fe);
1284
1285 } else {
1286 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1287
1288 /* For advanced delivery systems / modulation types ...
1289 * we seed the lecacy dvb_frontend_parameters structure
1290 * so that the sanity checking code later in the IOCTL processing
1291 * can validate our basic frequency ranges, symbolrates, modulation
1292 * etc.
1293 */
1294 dtv_property_adv_params_sync(fe);
1295 }
1296 }
1297
1298 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1299 unsigned int cmd, void *parg);
1300 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1301 unsigned int cmd, void *parg);
1302
1303 static int dtv_property_process_get(struct dvb_frontend *fe,
1304 struct dtv_property *tvp,
1305 struct inode *inode, struct file *file)
1306 {
1307 int r = 0;
1308
1309 dtv_property_dump(tvp);
1310
1311 /* Allow the frontend to validate incoming properties */
1312 if (fe->ops.get_property)
1313 r = fe->ops.get_property(fe, tvp);
1314
1315 if (r < 0)
1316 return r;
1317
1318 switch(tvp->cmd) {
1319 case DTV_FREQUENCY:
1320 tvp->u.data = fe->dtv_property_cache.frequency;
1321 break;
1322 case DTV_MODULATION:
1323 tvp->u.data = fe->dtv_property_cache.modulation;
1324 break;
1325 case DTV_BANDWIDTH_HZ:
1326 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1327 break;
1328 case DTV_INVERSION:
1329 tvp->u.data = fe->dtv_property_cache.inversion;
1330 break;
1331 case DTV_SYMBOL_RATE:
1332 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1333 break;
1334 case DTV_INNER_FEC:
1335 tvp->u.data = fe->dtv_property_cache.fec_inner;
1336 break;
1337 case DTV_PILOT:
1338 tvp->u.data = fe->dtv_property_cache.pilot;
1339 break;
1340 case DTV_ROLLOFF:
1341 tvp->u.data = fe->dtv_property_cache.rolloff;
1342 break;
1343 case DTV_DELIVERY_SYSTEM:
1344 tvp->u.data = fe->dtv_property_cache.delivery_system;
1345 break;
1346 case DTV_VOLTAGE:
1347 tvp->u.data = fe->dtv_property_cache.voltage;
1348 break;
1349 case DTV_TONE:
1350 tvp->u.data = fe->dtv_property_cache.sectone;
1351 break;
1352 case DTV_API_VERSION:
1353 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1354 break;
1355 case DTV_CODE_RATE_HP:
1356 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1357 break;
1358 case DTV_CODE_RATE_LP:
1359 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1360 break;
1361 case DTV_GUARD_INTERVAL:
1362 tvp->u.data = fe->dtv_property_cache.guard_interval;
1363 break;
1364 case DTV_TRANSMISSION_MODE:
1365 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1366 break;
1367 case DTV_HIERARCHY:
1368 tvp->u.data = fe->dtv_property_cache.hierarchy;
1369 break;
1370
1371 /* ISDB-T Support here */
1372 case DTV_ISDBT_PARTIAL_RECEPTION:
1373 tvp->u.data = fe->dtv_property_cache.isdbt_partial_reception;
1374 break;
1375 case DTV_ISDBT_SOUND_BROADCASTING:
1376 tvp->u.data = fe->dtv_property_cache.isdbt_sb_mode;
1377 break;
1378 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1379 tvp->u.data = fe->dtv_property_cache.isdbt_sb_subchannel;
1380 break;
1381 case DTV_ISDBT_SB_SEGMENT_IDX:
1382 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_idx;
1383 break;
1384 case DTV_ISDBT_SB_SEGMENT_COUNT:
1385 tvp->u.data = fe->dtv_property_cache.isdbt_sb_segment_count;
1386 break;
1387 case DTV_ISDBT_LAYER_ENABLED:
1388 tvp->u.data = fe->dtv_property_cache.isdbt_layer_enabled;
1389 break;
1390 case DTV_ISDBT_LAYERA_FEC:
1391 tvp->u.data = fe->dtv_property_cache.layer[0].fec;
1392 break;
1393 case DTV_ISDBT_LAYERA_MODULATION:
1394 tvp->u.data = fe->dtv_property_cache.layer[0].modulation;
1395 break;
1396 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1397 tvp->u.data = fe->dtv_property_cache.layer[0].segment_count;
1398 break;
1399 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1400 tvp->u.data = fe->dtv_property_cache.layer[0].interleaving;
1401 break;
1402 case DTV_ISDBT_LAYERB_FEC:
1403 tvp->u.data = fe->dtv_property_cache.layer[1].fec;
1404 break;
1405 case DTV_ISDBT_LAYERB_MODULATION:
1406 tvp->u.data = fe->dtv_property_cache.layer[1].modulation;
1407 break;
1408 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1409 tvp->u.data = fe->dtv_property_cache.layer[1].segment_count;
1410 break;
1411 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1412 tvp->u.data = fe->dtv_property_cache.layer[1].interleaving;
1413 break;
1414 case DTV_ISDBT_LAYERC_FEC:
1415 tvp->u.data = fe->dtv_property_cache.layer[2].fec;
1416 break;
1417 case DTV_ISDBT_LAYERC_MODULATION:
1418 tvp->u.data = fe->dtv_property_cache.layer[2].modulation;
1419 break;
1420 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1421 tvp->u.data = fe->dtv_property_cache.layer[2].segment_count;
1422 break;
1423 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1424 tvp->u.data = fe->dtv_property_cache.layer[2].interleaving;
1425 break;
1426 case DTV_ISDBS_TS_ID:
1427 tvp->u.data = fe->dtv_property_cache.isdbs_ts_id;
1428 break;
1429 default:
1430 r = -1;
1431 }
1432
1433 return r;
1434 }
1435
1436 static int dtv_property_process_set(struct dvb_frontend *fe,
1437 struct dtv_property *tvp,
1438 struct inode *inode,
1439 struct file *file)
1440 {
1441 int r = 0;
1442 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1443 dtv_property_dump(tvp);
1444
1445 /* Allow the frontend to validate incoming properties */
1446 if (fe->ops.set_property)
1447 r = fe->ops.set_property(fe, tvp);
1448
1449 if (r < 0)
1450 return r;
1451
1452 switch(tvp->cmd) {
1453 case DTV_CLEAR:
1454 /* Reset a cache of data specific to the frontend here. This does
1455 * not effect hardware.
1456 */
1457 dvb_frontend_clear_cache(fe);
1458 dprintk("%s() Flushing property cache\n", __func__);
1459 break;
1460 case DTV_TUNE:
1461 /* interpret the cache of data, build either a traditional frontend
1462 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1463 * ioctl.
1464 */
1465 fe->dtv_property_cache.state = tvp->cmd;
1466 dprintk("%s() Finalised property cache\n", __func__);
1467 dtv_property_cache_submit(fe);
1468
1469 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1470 &fepriv->parameters);
1471 break;
1472 case DTV_FREQUENCY:
1473 fe->dtv_property_cache.frequency = tvp->u.data;
1474 break;
1475 case DTV_MODULATION:
1476 fe->dtv_property_cache.modulation = tvp->u.data;
1477 break;
1478 case DTV_BANDWIDTH_HZ:
1479 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1480 break;
1481 case DTV_INVERSION:
1482 fe->dtv_property_cache.inversion = tvp->u.data;
1483 break;
1484 case DTV_SYMBOL_RATE:
1485 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1486 break;
1487 case DTV_INNER_FEC:
1488 fe->dtv_property_cache.fec_inner = tvp->u.data;
1489 break;
1490 case DTV_PILOT:
1491 fe->dtv_property_cache.pilot = tvp->u.data;
1492 break;
1493 case DTV_ROLLOFF:
1494 fe->dtv_property_cache.rolloff = tvp->u.data;
1495 break;
1496 case DTV_DELIVERY_SYSTEM:
1497 fe->dtv_property_cache.delivery_system = tvp->u.data;
1498 break;
1499 case DTV_VOLTAGE:
1500 fe->dtv_property_cache.voltage = tvp->u.data;
1501 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1502 (void *)fe->dtv_property_cache.voltage);
1503 break;
1504 case DTV_TONE:
1505 fe->dtv_property_cache.sectone = tvp->u.data;
1506 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1507 (void *)fe->dtv_property_cache.sectone);
1508 break;
1509 case DTV_CODE_RATE_HP:
1510 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1511 break;
1512 case DTV_CODE_RATE_LP:
1513 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1514 break;
1515 case DTV_GUARD_INTERVAL:
1516 fe->dtv_property_cache.guard_interval = tvp->u.data;
1517 break;
1518 case DTV_TRANSMISSION_MODE:
1519 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1520 break;
1521 case DTV_HIERARCHY:
1522 fe->dtv_property_cache.hierarchy = tvp->u.data;
1523 break;
1524
1525 /* ISDB-T Support here */
1526 case DTV_ISDBT_PARTIAL_RECEPTION:
1527 fe->dtv_property_cache.isdbt_partial_reception = tvp->u.data;
1528 break;
1529 case DTV_ISDBT_SOUND_BROADCASTING:
1530 fe->dtv_property_cache.isdbt_sb_mode = tvp->u.data;
1531 break;
1532 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1533 fe->dtv_property_cache.isdbt_sb_subchannel = tvp->u.data;
1534 break;
1535 case DTV_ISDBT_SB_SEGMENT_IDX:
1536 fe->dtv_property_cache.isdbt_sb_segment_idx = tvp->u.data;
1537 break;
1538 case DTV_ISDBT_SB_SEGMENT_COUNT:
1539 fe->dtv_property_cache.isdbt_sb_segment_count = tvp->u.data;
1540 break;
1541 case DTV_ISDBT_LAYER_ENABLED:
1542 fe->dtv_property_cache.isdbt_layer_enabled = tvp->u.data;
1543 break;
1544 case DTV_ISDBT_LAYERA_FEC:
1545 fe->dtv_property_cache.layer[0].fec = tvp->u.data;
1546 break;
1547 case DTV_ISDBT_LAYERA_MODULATION:
1548 fe->dtv_property_cache.layer[0].modulation = tvp->u.data;
1549 break;
1550 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1551 fe->dtv_property_cache.layer[0].segment_count = tvp->u.data;
1552 break;
1553 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1554 fe->dtv_property_cache.layer[0].interleaving = tvp->u.data;
1555 break;
1556 case DTV_ISDBT_LAYERB_FEC:
1557 fe->dtv_property_cache.layer[1].fec = tvp->u.data;
1558 break;
1559 case DTV_ISDBT_LAYERB_MODULATION:
1560 fe->dtv_property_cache.layer[1].modulation = tvp->u.data;
1561 break;
1562 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1563 fe->dtv_property_cache.layer[1].segment_count = tvp->u.data;
1564 break;
1565 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1566 fe->dtv_property_cache.layer[1].interleaving = tvp->u.data;
1567 break;
1568 case DTV_ISDBT_LAYERC_FEC:
1569 fe->dtv_property_cache.layer[2].fec = tvp->u.data;
1570 break;
1571 case DTV_ISDBT_LAYERC_MODULATION:
1572 fe->dtv_property_cache.layer[2].modulation = tvp->u.data;
1573 break;
1574 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1575 fe->dtv_property_cache.layer[2].segment_count = tvp->u.data;
1576 break;
1577 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1578 fe->dtv_property_cache.layer[2].interleaving = tvp->u.data;
1579 break;
1580 case DTV_ISDBS_TS_ID:
1581 fe->dtv_property_cache.isdbs_ts_id = tvp->u.data;
1582 break;
1583 default:
1584 r = -1;
1585 }
1586
1587 return r;
1588 }
1589
1590 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1591 unsigned int cmd, void *parg)
1592 {
1593 struct dvb_device *dvbdev = file->private_data;
1594 struct dvb_frontend *fe = dvbdev->priv;
1595 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1596 int err = -EOPNOTSUPP;
1597
1598 dprintk ("%s\n", __func__);
1599
1600 if (fepriv->exit)
1601 return -ENODEV;
1602
1603 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1604 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1605 cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1606 return -EPERM;
1607
1608 if (down_interruptible (&fepriv->sem))
1609 return -ERESTARTSYS;
1610
1611 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1612 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1613 else {
1614 fe->dtv_property_cache.state = DTV_UNDEFINED;
1615 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1616 }
1617
1618 up(&fepriv->sem);
1619 return err;
1620 }
1621
1622 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1623 unsigned int cmd, void *parg)
1624 {
1625 struct dvb_device *dvbdev = file->private_data;
1626 struct dvb_frontend *fe = dvbdev->priv;
1627 int err = 0;
1628
1629 struct dtv_properties *tvps = NULL;
1630 struct dtv_property *tvp = NULL;
1631 int i;
1632
1633 dprintk("%s\n", __func__);
1634
1635 if(cmd == FE_SET_PROPERTY) {
1636 tvps = (struct dtv_properties __user *)parg;
1637
1638 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1639 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1640
1641 /* Put an arbitrary limit on the number of messages that can
1642 * be sent at once */
1643 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1644 return -EINVAL;
1645
1646 tvp = (struct dtv_property *) kmalloc(tvps->num *
1647 sizeof(struct dtv_property), GFP_KERNEL);
1648 if (!tvp) {
1649 err = -ENOMEM;
1650 goto out;
1651 }
1652
1653 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1654 err = -EFAULT;
1655 goto out;
1656 }
1657
1658 for (i = 0; i < tvps->num; i++) {
1659 (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1660 err |= (tvp + i)->result;
1661 }
1662
1663 if(fe->dtv_property_cache.state == DTV_TUNE)
1664 dprintk("%s() Property cache is full, tuning\n", __func__);
1665
1666 } else
1667 if(cmd == FE_GET_PROPERTY) {
1668
1669 tvps = (struct dtv_properties __user *)parg;
1670
1671 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1672 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1673
1674 /* Put an arbitrary limit on the number of messages that can
1675 * be sent at once */
1676 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1677 return -EINVAL;
1678
1679 tvp = (struct dtv_property *) kmalloc(tvps->num *
1680 sizeof(struct dtv_property), GFP_KERNEL);
1681 if (!tvp) {
1682 err = -ENOMEM;
1683 goto out;
1684 }
1685
1686 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1687 err = -EFAULT;
1688 goto out;
1689 }
1690
1691 for (i = 0; i < tvps->num; i++) {
1692 (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1693 err |= (tvp + i)->result;
1694 }
1695
1696 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1697 err = -EFAULT;
1698 goto out;
1699 }
1700
1701 } else
1702 err = -EOPNOTSUPP;
1703
1704 out:
1705 kfree(tvp);
1706 return err;
1707 }
1708
1709 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1710 unsigned int cmd, void *parg)
1711 {
1712 struct dvb_device *dvbdev = file->private_data;
1713 struct dvb_frontend *fe = dvbdev->priv;
1714 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1715 int err = -EOPNOTSUPP;
1716
1717 switch (cmd) {
1718 case FE_GET_INFO: {
1719 struct dvb_frontend_info* info = parg;
1720 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1721 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1722
1723 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1724 * do it, it is done for it. */
1725 info->caps |= FE_CAN_INVERSION_AUTO;
1726 err = 0;
1727 break;
1728 }
1729
1730 case FE_READ_STATUS: {
1731 fe_status_t* status = parg;
1732
1733 /* if retune was requested but hasn't occured yet, prevent
1734 * that user get signal state from previous tuning */
1735 if (fepriv->state == FESTATE_RETUNE ||
1736 fepriv->state == FESTATE_ERROR) {
1737 err=0;
1738 *status = 0;
1739 break;
1740 }
1741
1742 if (fe->ops.read_status)
1743 err = fe->ops.read_status(fe, status);
1744 break;
1745 }
1746 case FE_READ_BER:
1747 if (fe->ops.read_ber)
1748 err = fe->ops.read_ber(fe, (__u32*) parg);
1749 break;
1750
1751 case FE_READ_SIGNAL_STRENGTH:
1752 if (fe->ops.read_signal_strength)
1753 err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1754 break;
1755
1756 case FE_READ_SNR:
1757 if (fe->ops.read_snr)
1758 err = fe->ops.read_snr(fe, (__u16*) parg);
1759 break;
1760
1761 case FE_READ_UNCORRECTED_BLOCKS:
1762 if (fe->ops.read_ucblocks)
1763 err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1764 break;
1765
1766
1767 case FE_DISEQC_RESET_OVERLOAD:
1768 if (fe->ops.diseqc_reset_overload) {
1769 err = fe->ops.diseqc_reset_overload(fe);
1770 fepriv->state = FESTATE_DISEQC;
1771 fepriv->status = 0;
1772 }
1773 break;
1774
1775 case FE_DISEQC_SEND_MASTER_CMD:
1776 if (fe->ops.diseqc_send_master_cmd) {
1777 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1778 fepriv->state = FESTATE_DISEQC;
1779 fepriv->status = 0;
1780 }
1781 break;
1782
1783 case FE_DISEQC_SEND_BURST:
1784 if (fe->ops.diseqc_send_burst) {
1785 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1786 fepriv->state = FESTATE_DISEQC;
1787 fepriv->status = 0;
1788 }
1789 break;
1790
1791 case FE_SET_TONE:
1792 if (fe->ops.set_tone) {
1793 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1794 fepriv->tone = (fe_sec_tone_mode_t) parg;
1795 fepriv->state = FESTATE_DISEQC;
1796 fepriv->status = 0;
1797 }
1798 break;
1799
1800 case FE_SET_VOLTAGE:
1801 if (fe->ops.set_voltage) {
1802 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1803 fepriv->voltage = (fe_sec_voltage_t) parg;
1804 fepriv->state = FESTATE_DISEQC;
1805 fepriv->status = 0;
1806 }
1807 break;
1808
1809 case FE_DISHNETWORK_SEND_LEGACY_CMD:
1810 if (fe->ops.dishnetwork_send_legacy_command) {
1811 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1812 fepriv->state = FESTATE_DISEQC;
1813 fepriv->status = 0;
1814 } else if (fe->ops.set_voltage) {
1815 /*
1816 * NOTE: This is a fallback condition. Some frontends
1817 * (stv0299 for instance) take longer than 8msec to
1818 * respond to a set_voltage command. Those switches
1819 * need custom routines to switch properly. For all
1820 * other frontends, the following shoule work ok.
1821 * Dish network legacy switches (as used by Dish500)
1822 * are controlled by sending 9-bit command words
1823 * spaced 8msec apart.
1824 * the actual command word is switch/port dependant
1825 * so it is up to the userspace application to send
1826 * the right command.
1827 * The command must always start with a '0' after
1828 * initialization, so parg is 8 bits and does not
1829 * include the initialization or start bit
1830 */
1831 unsigned long swcmd = ((unsigned long) parg) << 1;
1832 struct timeval nexttime;
1833 struct timeval tv[10];
1834 int i;
1835 u8 last = 1;
1836 if (dvb_frontend_debug)
1837 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1838 do_gettimeofday(&nexttime);
1839 if (dvb_frontend_debug)
1840 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1841 /* before sending a command, initialize by sending
1842 * a 32ms 18V to the switch
1843 */
1844 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1845 dvb_frontend_sleep_until(&nexttime, 32000);
1846
1847 for (i = 0; i < 9; i++) {
1848 if (dvb_frontend_debug)
1849 do_gettimeofday(&tv[i + 1]);
1850 if ((swcmd & 0x01) != last) {
1851 /* set voltage to (last ? 13V : 18V) */
1852 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1853 last = (last) ? 0 : 1;
1854 }
1855 swcmd = swcmd >> 1;
1856 if (i != 8)
1857 dvb_frontend_sleep_until(&nexttime, 8000);
1858 }
1859 if (dvb_frontend_debug) {
1860 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1861 __func__, fe->dvb->num);
1862 for (i = 1; i < 10; i++)
1863 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1864 }
1865 err = 0;
1866 fepriv->state = FESTATE_DISEQC;
1867 fepriv->status = 0;
1868 }
1869 break;
1870
1871 case FE_DISEQC_RECV_SLAVE_REPLY:
1872 if (fe->ops.diseqc_recv_slave_reply)
1873 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1874 break;
1875
1876 case FE_ENABLE_HIGH_LNB_VOLTAGE:
1877 if (fe->ops.enable_high_lnb_voltage)
1878 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1879 break;
1880
1881 case FE_SET_FRONTEND: {
1882 struct dvb_frontend_tune_settings fetunesettings;
1883
1884 if(fe->dtv_property_cache.state == DTV_TUNE) {
1885 if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1886 err = -EINVAL;
1887 break;
1888 }
1889 } else {
1890 if (dvb_frontend_check_parameters(fe, parg) < 0) {
1891 err = -EINVAL;
1892 break;
1893 }
1894
1895 memcpy (&fepriv->parameters, parg,
1896 sizeof (struct dvb_frontend_parameters));
1897 dtv_property_cache_sync(fe, &fepriv->parameters);
1898 }
1899
1900 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1901 memcpy(&fetunesettings.parameters, parg,
1902 sizeof (struct dvb_frontend_parameters));
1903
1904 /* force auto frequency inversion if requested */
1905 if (dvb_force_auto_inversion) {
1906 fepriv->parameters.inversion = INVERSION_AUTO;
1907 fetunesettings.parameters.inversion = INVERSION_AUTO;
1908 }
1909 if (fe->ops.info.type == FE_OFDM) {
1910 /* without hierarchical coding code_rate_LP is irrelevant,
1911 * so we tolerate the otherwise invalid FEC_NONE setting */
1912 if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1913 fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1914 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1915 }
1916
1917 /* get frontend-specific tuning settings */
1918 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1919 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1920 fepriv->max_drift = fetunesettings.max_drift;
1921 fepriv->step_size = fetunesettings.step_size;
1922 } else {
1923 /* default values */
1924 switch(fe->ops.info.type) {
1925 case FE_QPSK:
1926 fepriv->min_delay = HZ/20;
1927 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1928 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1929 break;
1930
1931 case FE_QAM:
1932 fepriv->min_delay = HZ/20;
1933 fepriv->step_size = 0; /* no zigzag */
1934 fepriv->max_drift = 0;
1935 break;
1936
1937 case FE_OFDM:
1938 fepriv->min_delay = HZ/20;
1939 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1940 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1941 break;
1942 case FE_ATSC:
1943 fepriv->min_delay = HZ/20;
1944 fepriv->step_size = 0;
1945 fepriv->max_drift = 0;
1946 break;
1947 }
1948 }
1949 if (dvb_override_tune_delay > 0)
1950 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1951
1952 fepriv->state = FESTATE_RETUNE;
1953
1954 /* Request the search algorithm to search */
1955 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1956
1957 dvb_frontend_wakeup(fe);
1958 dvb_frontend_add_event(fe, 0);
1959 fepriv->status = 0;
1960 err = 0;
1961 break;
1962 }
1963
1964 case FE_GET_EVENT:
1965 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1966 break;
1967
1968 case FE_GET_FRONTEND:
1969 if (fe->ops.get_frontend) {
1970 memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1971 err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1972 }
1973 break;
1974
1975 case FE_SET_FRONTEND_TUNE_MODE:
1976 fepriv->tune_mode_flags = (unsigned long) parg;
1977 err = 0;
1978 break;
1979 };
1980
1981 return err;
1982 }
1983
1984
1985 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1986 {
1987 struct dvb_device *dvbdev = file->private_data;
1988 struct dvb_frontend *fe = dvbdev->priv;
1989 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1990
1991 dprintk ("%s\n", __func__);
1992
1993 poll_wait (file, &fepriv->events.wait_queue, wait);
1994
1995 if (fepriv->events.eventw != fepriv->events.eventr)
1996 return (POLLIN | POLLRDNORM | POLLPRI);
1997
1998 return 0;
1999 }
2000
2001 static int dvb_frontend_open(struct inode *inode, struct file *file)
2002 {
2003 struct dvb_device *dvbdev = file->private_data;
2004 struct dvb_frontend *fe = dvbdev->priv;
2005 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2006 struct dvb_adapter *adapter = fe->dvb;
2007 int ret;
2008
2009 dprintk ("%s\n", __func__);
2010
2011 if (adapter->mfe_shared) {
2012 mutex_lock (&adapter->mfe_lock);
2013
2014 if (adapter->mfe_dvbdev == NULL)
2015 adapter->mfe_dvbdev = dvbdev;
2016
2017 else if (adapter->mfe_dvbdev != dvbdev) {
2018 struct dvb_device
2019 *mfedev = adapter->mfe_dvbdev;
2020 struct dvb_frontend
2021 *mfe = mfedev->priv;
2022 struct dvb_frontend_private
2023 *mfepriv = mfe->frontend_priv;
2024 int mferetry = (dvb_mfe_wait_time << 1);
2025
2026 mutex_unlock (&adapter->mfe_lock);
2027 while (mferetry-- && (mfedev->users != -1 ||
2028 mfepriv->thread != NULL)) {
2029 if(msleep_interruptible(500)) {
2030 if(signal_pending(current))
2031 return -EINTR;
2032 }
2033 }
2034
2035 mutex_lock (&adapter->mfe_lock);
2036 if(adapter->mfe_dvbdev != dvbdev) {
2037 mfedev = adapter->mfe_dvbdev;
2038 mfe = mfedev->priv;
2039 mfepriv = mfe->frontend_priv;
2040 if (mfedev->users != -1 ||
2041 mfepriv->thread != NULL) {
2042 mutex_unlock (&adapter->mfe_lock);
2043 return -EBUSY;
2044 }
2045 adapter->mfe_dvbdev = dvbdev;
2046 }
2047 }
2048 }
2049
2050 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2051 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2052 goto err0;
2053 }
2054
2055 if ((ret = dvb_generic_open (inode, file)) < 0)
2056 goto err1;
2057
2058 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2059 /* normal tune mode when opened R/W */
2060 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2061 fepriv->tone = -1;
2062 fepriv->voltage = -1;
2063
2064 ret = dvb_frontend_start (fe);
2065 if (ret)
2066 goto err2;
2067
2068 /* empty event queue */
2069 fepriv->events.eventr = fepriv->events.eventw = 0;
2070 }
2071
2072 if (adapter->mfe_shared)
2073 mutex_unlock (&adapter->mfe_lock);
2074 return ret;
2075
2076 err2:
2077 dvb_generic_release(inode, file);
2078 err1:
2079 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2080 fe->ops.ts_bus_ctrl(fe, 0);
2081 err0:
2082 if (adapter->mfe_shared)
2083 mutex_unlock (&adapter->mfe_lock);
2084 return ret;
2085 }
2086
2087 static int dvb_frontend_release(struct inode *inode, struct file *file)
2088 {
2089 struct dvb_device *dvbdev = file->private_data;
2090 struct dvb_frontend *fe = dvbdev->priv;
2091 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2092 int ret;
2093
2094 dprintk ("%s\n", __func__);
2095
2096 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
2097 fepriv->release_jiffies = jiffies;
2098
2099 ret = dvb_generic_release (inode, file);
2100
2101 if (dvbdev->users == -1) {
2102 if (fepriv->exit == 1) {
2103 fops_put(file->f_op);
2104 file->f_op = NULL;
2105 wake_up(&dvbdev->wait_queue);
2106 }
2107 if (fe->ops.ts_bus_ctrl)
2108 fe->ops.ts_bus_ctrl(fe, 0);
2109 }
2110
2111 return ret;
2112 }
2113
2114 static const struct file_operations dvb_frontend_fops = {
2115 .owner = THIS_MODULE,
2116 .ioctl = dvb_generic_ioctl,
2117 .poll = dvb_frontend_poll,
2118 .open = dvb_frontend_open,
2119 .release = dvb_frontend_release
2120 };
2121
2122 int dvb_register_frontend(struct dvb_adapter* dvb,
2123 struct dvb_frontend* fe)
2124 {
2125 struct dvb_frontend_private *fepriv;
2126 static const struct dvb_device dvbdev_template = {
2127 .users = ~0,
2128 .writers = 1,
2129 .readers = (~0)-1,
2130 .fops = &dvb_frontend_fops,
2131 .kernel_ioctl = dvb_frontend_ioctl
2132 };
2133
2134 dprintk ("%s\n", __func__);
2135
2136 if (mutex_lock_interruptible(&frontend_mutex))
2137 return -ERESTARTSYS;
2138
2139 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2140 if (fe->frontend_priv == NULL) {
2141 mutex_unlock(&frontend_mutex);
2142 return -ENOMEM;
2143 }
2144 fepriv = fe->frontend_priv;
2145
2146 init_MUTEX (&fepriv->sem);
2147 init_waitqueue_head (&fepriv->wait_queue);
2148 init_waitqueue_head (&fepriv->events.wait_queue);
2149 mutex_init(&fepriv->events.mtx);
2150 fe->dvb = dvb;
2151 fepriv->inversion = INVERSION_OFF;
2152
2153 printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2154 fe->dvb->num,
2155 fe->id,
2156 fe->ops.info.name);
2157
2158 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2159 fe, DVB_DEVICE_FRONTEND);
2160
2161 mutex_unlock(&frontend_mutex);
2162 return 0;
2163 }
2164 EXPORT_SYMBOL(dvb_register_frontend);
2165
2166 int dvb_unregister_frontend(struct dvb_frontend* fe)
2167 {
2168 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2169 dprintk ("%s\n", __func__);
2170
2171 mutex_lock(&frontend_mutex);
2172 dvb_frontend_stop (fe);
2173 mutex_unlock(&frontend_mutex);
2174
2175 if (fepriv->dvbdev->users < -1)
2176 wait_event(fepriv->dvbdev->wait_queue,
2177 fepriv->dvbdev->users==-1);
2178
2179 mutex_lock(&frontend_mutex);
2180 dvb_unregister_device (fepriv->dvbdev);
2181
2182 /* fe is invalid now */
2183 kfree(fepriv);
2184 mutex_unlock(&frontend_mutex);
2185 return 0;
2186 }
2187 EXPORT_SYMBOL(dvb_unregister_frontend);
2188
2189 #ifdef CONFIG_MEDIA_ATTACH
2190 void dvb_frontend_detach(struct dvb_frontend* fe)
2191 {
2192 void *ptr;
2193
2194 if (fe->ops.release_sec) {
2195 fe->ops.release_sec(fe);
2196 symbol_put_addr(fe->ops.release_sec);
2197 }
2198 if (fe->ops.tuner_ops.release) {
2199 fe->ops.tuner_ops.release(fe);
2200 symbol_put_addr(fe->ops.tuner_ops.release);
2201 }
2202 if (fe->ops.analog_ops.release) {
2203 fe->ops.analog_ops.release(fe);
2204 symbol_put_addr(fe->ops.analog_ops.release);
2205 }
2206 ptr = (void*)fe->ops.release;
2207 if (ptr) {
2208 fe->ops.release(fe);
2209 symbol_put_addr(ptr);
2210 }
2211 }
2212 #else
2213 void dvb_frontend_detach(struct dvb_frontend* fe)
2214 {
2215 if (fe->ops.release_sec)
2216 fe->ops.release_sec(fe);
2217 if (fe->ops.tuner_ops.release)
2218 fe->ops.tuner_ops.release(fe);
2219 if (fe->ops.analog_ops.release)
2220 fe->ops.analog_ops.release(fe);
2221 if (fe->ops.release)
2222 fe->ops.release(fe);
2223 }
2224 #endif
2225 EXPORT_SYMBOL(dvb_frontend_detach);
Linux ARM platform port for MOXA ART SoC