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powerpc: use consistent types in mktree
[zen-stable.git] / drivers / media / dvb / dvb-core / dvb_frontend.c
blobf50ca7292a7d4e8bd6c69ffd58368db0c749b923
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/module.h>
35 #include <linux/list.h>
36 #include <linux/freezer.h>
37 #include <linux/jiffies.h>
38 #include <linux/kthread.h>
39 #include <asm/processor.h>
40
41 #include "dvb_frontend.h"
42 #include "dvbdev.h"
43 #include <linux/dvb/version.h>
44
45 static int dvb_frontend_debug;
46 static int dvb_shutdown_timeout;
47 static int dvb_force_auto_inversion;
48 static int dvb_override_tune_delay;
49 static int dvb_powerdown_on_sleep = 1;
50 static int dvb_mfe_wait_time = 5;
51
52 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
53 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
54 module_param(dvb_shutdown_timeout, int, 0644);
55 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
56 module_param(dvb_force_auto_inversion, int, 0644);
57 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
58 module_param(dvb_override_tune_delay, int, 0644);
59 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
60 module_param(dvb_powerdown_on_sleep, int, 0644);
61 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
62 module_param(dvb_mfe_wait_time, int, 0644);
63 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)");
64
65 #define dprintk if (dvb_frontend_debug) printk
66
67 #define FESTATE_IDLE 1
68 #define FESTATE_RETUNE 2
69 #define FESTATE_TUNING_FAST 4
70 #define FESTATE_TUNING_SLOW 8
71 #define FESTATE_TUNED 16
72 #define FESTATE_ZIGZAG_FAST 32
73 #define FESTATE_ZIGZAG_SLOW 64
74 #define FESTATE_DISEQC 128
75 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
76 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
77 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
78 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
79
80 #define FE_ALGO_HW 1
81 /*
82 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
83 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
84 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
85 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
86 * FESTATE_TUNED. The frontend has successfully locked on.
87 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
88 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
89 * FESTATE_DISEQC. A DISEQC command has just been issued.
90 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
91 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
92 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
93 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
94 */
95
96 static DEFINE_MUTEX(frontend_mutex);
97
98 struct dvb_frontend_private {
99
100 /* thread/frontend values */
101 struct dvb_device *dvbdev;
102 struct dvb_frontend_parameters parameters;
103 struct dvb_fe_events events;
104 struct semaphore sem;
105 struct list_head list_head;
106 wait_queue_head_t wait_queue;
107 struct task_struct *thread;
108 unsigned long release_jiffies;
109 unsigned int exit;
110 unsigned int wakeup;
111 fe_status_t status;
112 unsigned long tune_mode_flags;
113 unsigned int delay;
114 unsigned int reinitialise;
115 int tone;
116 int voltage;
117
118 /* swzigzag values */
119 unsigned int state;
120 unsigned int bending;
121 int lnb_drift;
122 unsigned int inversion;
123 unsigned int auto_step;
124 unsigned int auto_sub_step;
125 unsigned int started_auto_step;
126 unsigned int min_delay;
127 unsigned int max_drift;
128 unsigned int step_size;
129 int quality;
130 unsigned int check_wrapped;
131 enum dvbfe_search algo_status;
132 };
133
134 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
135
136 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
137 {
138 struct dvb_frontend_private *fepriv = fe->frontend_priv;
139 struct dvb_fe_events *events = &fepriv->events;
140 struct dvb_frontend_event *e;
141 int wp;
142
143 dprintk ("%s\n", __func__);
144
145 if (mutex_lock_interruptible (&events->mtx))
146 return;
147
148 wp = (events->eventw + 1) % MAX_EVENT;
149
150 if (wp == events->eventr) {
151 events->overflow = 1;
152 events->eventr = (events->eventr + 1) % MAX_EVENT;
153 }
154
155 e = &events->events[events->eventw];
156
157 memcpy (&e->parameters, &fepriv->parameters,
158 sizeof (struct dvb_frontend_parameters));
159
160 if (status & FE_HAS_LOCK)
161 if (fe->ops.get_frontend)
162 fe->ops.get_frontend(fe, &e->parameters);
163
164 events->eventw = wp;
165
166 mutex_unlock(&events->mtx);
167
168 e->status = status;
169
170 wake_up_interruptible (&events->wait_queue);
171 }
172
173 static int dvb_frontend_get_event(struct dvb_frontend *fe,
174 struct dvb_frontend_event *event, int flags)
175 {
176 struct dvb_frontend_private *fepriv = fe->frontend_priv;
177 struct dvb_fe_events *events = &fepriv->events;
178
179 dprintk ("%s\n", __func__);
180
181 if (events->overflow) {
182 events->overflow = 0;
183 return -EOVERFLOW;
184 }
185
186 if (events->eventw == events->eventr) {
187 int ret;
188
189 if (flags & O_NONBLOCK)
190 return -EWOULDBLOCK;
191
192 up(&fepriv->sem);
193
194 ret = wait_event_interruptible (events->wait_queue,
195 events->eventw != events->eventr);
196
197 if (down_interruptible (&fepriv->sem))
198 return -ERESTARTSYS;
199
200 if (ret < 0)
201 return ret;
202 }
203
204 if (mutex_lock_interruptible (&events->mtx))
205 return -ERESTARTSYS;
206
207 memcpy (event, &events->events[events->eventr],
208 sizeof(struct dvb_frontend_event));
209
210 events->eventr = (events->eventr + 1) % MAX_EVENT;
211
212 mutex_unlock(&events->mtx);
213
214 return 0;
215 }
216
217 static void dvb_frontend_init(struct dvb_frontend *fe)
218 {
219 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
220 fe->dvb->num,
221 fe->id,
222 fe->ops.info.name);
223
224 if (fe->ops.init)
225 fe->ops.init(fe);
226 if (fe->ops.tuner_ops.init) {
227 if (fe->ops.i2c_gate_ctrl)
228 fe->ops.i2c_gate_ctrl(fe, 1);
229 fe->ops.tuner_ops.init(fe);
230 if (fe->ops.i2c_gate_ctrl)
231 fe->ops.i2c_gate_ctrl(fe, 0);
232 }
233 }
234
235 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
236 {
237 struct dvb_frontend_private *fepriv = fe->frontend_priv;
238
239 fepriv->reinitialise = 1;
240 dvb_frontend_wakeup(fe);
241 }
242 EXPORT_SYMBOL(dvb_frontend_reinitialise);
243
244 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
245 {
246 int q2;
247
248 dprintk ("%s\n", __func__);
249
250 if (locked)
251 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
252 else
253 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
254
255 q2 = fepriv->quality - 128;
256 q2 *= q2;
257
258 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
259 }
260
261 /**
262 * Performs automatic twiddling of frontend parameters.
263 *
264 * @param fe The frontend concerned.
265 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
266 * @returns Number of complete iterations that have been performed.
267 */
268 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
269 {
270 int autoinversion;
271 int ready = 0;
272 struct dvb_frontend_private *fepriv = fe->frontend_priv;
273 int original_inversion = fepriv->parameters.inversion;
274 u32 original_frequency = fepriv->parameters.frequency;
275
276 /* are we using autoinversion? */
277 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
278 (fepriv->parameters.inversion == INVERSION_AUTO));
279
280 /* setup parameters correctly */
281 while(!ready) {
282 /* calculate the lnb_drift */
283 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
284
285 /* wrap the auto_step if we've exceeded the maximum drift */
286 if (fepriv->lnb_drift > fepriv->max_drift) {
287 fepriv->auto_step = 0;
288 fepriv->auto_sub_step = 0;
289 fepriv->lnb_drift = 0;
290 }
291
292 /* perform inversion and +/- zigzag */
293 switch(fepriv->auto_sub_step) {
294 case 0:
295 /* try with the current inversion and current drift setting */
296 ready = 1;
297 break;
298
299 case 1:
300 if (!autoinversion) break;
301
302 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
303 ready = 1;
304 break;
305
306 case 2:
307 if (fepriv->lnb_drift == 0) break;
308
309 fepriv->lnb_drift = -fepriv->lnb_drift;
310 ready = 1;
311 break;
312
313 case 3:
314 if (fepriv->lnb_drift == 0) break;
315 if (!autoinversion) break;
316
317 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
318 fepriv->lnb_drift = -fepriv->lnb_drift;
319 ready = 1;
320 break;
321
322 default:
323 fepriv->auto_step++;
324 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
325 break;
326 }
327
328 if (!ready) fepriv->auto_sub_step++;
329 }
330
331 /* if this attempt would hit where we started, indicate a complete
332 * iteration has occurred */
333 if ((fepriv->auto_step == fepriv->started_auto_step) &&
334 (fepriv->auto_sub_step == 0) && check_wrapped) {
335 return 1;
336 }
337
338 dprintk("%s: drift:%i inversion:%i auto_step:%i "
339 "auto_sub_step:%i started_auto_step:%i\n",
340 __func__, fepriv->lnb_drift, fepriv->inversion,
341 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
342
343 /* set the frontend itself */
344 fepriv->parameters.frequency += fepriv->lnb_drift;
345 if (autoinversion)
346 fepriv->parameters.inversion = fepriv->inversion;
347 if (fe->ops.set_frontend)
348 fe->ops.set_frontend(fe, &fepriv->parameters);
349
350 fepriv->parameters.frequency = original_frequency;
351 fepriv->parameters.inversion = original_inversion;
352
353 fepriv->auto_sub_step++;
354 return 0;
355 }
356
357 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
358 {
359 fe_status_t s = 0;
360 struct dvb_frontend_private *fepriv = fe->frontend_priv;
361
362 /* if we've got no parameters, just keep idling */
363 if (fepriv->state & FESTATE_IDLE) {
364 fepriv->delay = 3*HZ;
365 fepriv->quality = 0;
366 return;
367 }
368
369 /* in SCAN mode, we just set the frontend when asked and leave it alone */
370 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
371 if (fepriv->state & FESTATE_RETUNE) {
372 if (fe->ops.set_frontend)
373 fe->ops.set_frontend(fe, &fepriv->parameters);
374 fepriv->state = FESTATE_TUNED;
375 }
376 fepriv->delay = 3*HZ;
377 fepriv->quality = 0;
378 return;
379 }
380
381 /* get the frontend status */
382 if (fepriv->state & FESTATE_RETUNE) {
383 s = 0;
384 } else {
385 if (fe->ops.read_status)
386 fe->ops.read_status(fe, &s);
387 if (s != fepriv->status) {
388 dvb_frontend_add_event(fe, s);
389 fepriv->status = s;
390 }
391 }
392
393 /* if we're not tuned, and we have a lock, move to the TUNED state */
394 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
395 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
396 fepriv->state = FESTATE_TUNED;
397
398 /* if we're tuned, then we have determined the correct inversion */
399 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
400 (fepriv->parameters.inversion == INVERSION_AUTO)) {
401 fepriv->parameters.inversion = fepriv->inversion;
402 }
403 return;
404 }
405
406 /* if we are tuned already, check we're still locked */
407 if (fepriv->state & FESTATE_TUNED) {
408 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
409
410 /* we're tuned, and the lock is still good... */
411 if (s & FE_HAS_LOCK) {
412 return;
413 } else { /* if we _WERE_ tuned, but now don't have a lock */
414 fepriv->state = FESTATE_ZIGZAG_FAST;
415 fepriv->started_auto_step = fepriv->auto_step;
416 fepriv->check_wrapped = 0;
417 }
418 }
419
420 /* don't actually do anything if we're in the LOSTLOCK state,
421 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
422 if ((fepriv->state & FESTATE_LOSTLOCK) &&
423 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
424 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
425 return;
426 }
427
428 /* don't do anything if we're in the DISEQC state, since this
429 * might be someone with a motorized dish controlled by DISEQC.
430 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
431 if (fepriv->state & FESTATE_DISEQC) {
432 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
433 return;
434 }
435
436 /* if we're in the RETUNE state, set everything up for a brand
437 * new scan, keeping the current inversion setting, as the next
438 * tune is _very_ likely to require the same */
439 if (fepriv->state & FESTATE_RETUNE) {
440 fepriv->lnb_drift = 0;
441 fepriv->auto_step = 0;
442 fepriv->auto_sub_step = 0;
443 fepriv->started_auto_step = 0;
444 fepriv->check_wrapped = 0;
445 }
446
447 /* fast zigzag. */
448 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
449 fepriv->delay = fepriv->min_delay;
450
451 /* peform a tune */
452 if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) {
453 /* OK, if we've run out of trials at the fast speed.
454 * Drop back to slow for the _next_ attempt */
455 fepriv->state = FESTATE_SEARCHING_SLOW;
456 fepriv->started_auto_step = fepriv->auto_step;
457 return;
458 }
459 fepriv->check_wrapped = 1;
460
461 /* if we've just retuned, enter the ZIGZAG_FAST state.
462 * This ensures we cannot return from an
463 * FE_SET_FRONTEND ioctl before the first frontend tune
464 * occurs */
465 if (fepriv->state & FESTATE_RETUNE) {
466 fepriv->state = FESTATE_TUNING_FAST;
467 }
468 }
469
470 /* slow zigzag */
471 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
472 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
473
474 /* Note: don't bother checking for wrapping; we stay in this
475 * state until we get a lock */
476 dvb_frontend_swzigzag_autotune(fe, 0);
477 }
478 }
479
480 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
481 {
482 struct dvb_frontend_private *fepriv = fe->frontend_priv;
483
484 if (fepriv->exit)
485 return 1;
486
487 if (fepriv->dvbdev->writers == 1)
488 if (time_after(jiffies, fepriv->release_jiffies +
489 dvb_shutdown_timeout * HZ))
490 return 1;
491
492 return 0;
493 }
494
495 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
496 {
497 struct dvb_frontend_private *fepriv = fe->frontend_priv;
498
499 if (fepriv->wakeup) {
500 fepriv->wakeup = 0;
501 return 1;
502 }
503 return dvb_frontend_is_exiting(fe);
504 }
505
506 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
507 {
508 struct dvb_frontend_private *fepriv = fe->frontend_priv;
509
510 fepriv->wakeup = 1;
511 wake_up_interruptible(&fepriv->wait_queue);
512 }
513
514 static int dvb_frontend_thread(void *data)
515 {
516 struct dvb_frontend *fe = data;
517 struct dvb_frontend_private *fepriv = fe->frontend_priv;
518 unsigned long timeout;
519 fe_status_t s;
520 enum dvbfe_algo algo;
521
522 struct dvb_frontend_parameters *params;
523
524 dprintk("%s\n", __func__);
525
526 fepriv->check_wrapped = 0;
527 fepriv->quality = 0;
528 fepriv->delay = 3*HZ;
529 fepriv->status = 0;
530 fepriv->wakeup = 0;
531 fepriv->reinitialise = 0;
532
533 dvb_frontend_init(fe);
534
535 set_freezable();
536 while (1) {
537 up(&fepriv->sem); /* is locked when we enter the thread... */
538 restart:
539 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
540 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
541 || freezing(current),
542 fepriv->delay);
543
544 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
545 /* got signal or quitting */
546 fepriv->exit = 1;
547 break;
548 }
549
550 if (try_to_freeze())
551 goto restart;
552
553 if (down_interruptible(&fepriv->sem))
554 break;
555
556 if (fepriv->reinitialise) {
557 dvb_frontend_init(fe);
558 if (fepriv->tone != -1) {
559 fe->ops.set_tone(fe, fepriv->tone);
560 }
561 if (fepriv->voltage != -1) {
562 fe->ops.set_voltage(fe, fepriv->voltage);
563 }
564 fepriv->reinitialise = 0;
565 }
566
567 /* do an iteration of the tuning loop */
568 if (fe->ops.get_frontend_algo) {
569 algo = fe->ops.get_frontend_algo(fe);
570 switch (algo) {
571 case DVBFE_ALGO_HW:
572 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
573 params = NULL; /* have we been asked to RETUNE ? */
574
575 if (fepriv->state & FESTATE_RETUNE) {
576 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
577 params = &fepriv->parameters;
578 fepriv->state = FESTATE_TUNED;
579 }
580
581 if (fe->ops.tune)
582 fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
583
584 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
585 dprintk("%s: state changed, adding current state\n", __func__);
586 dvb_frontend_add_event(fe, s);
587 fepriv->status = s;
588 }
589 break;
590 case DVBFE_ALGO_SW:
591 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
592 dvb_frontend_swzigzag(fe);
593 break;
594 case DVBFE_ALGO_CUSTOM:
595 params = NULL; /* have we been asked to RETUNE ? */
596 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
597 if (fepriv->state & FESTATE_RETUNE) {
598 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
599 params = &fepriv->parameters;
600 fepriv->state = FESTATE_TUNED;
601 }
602 /* Case where we are going to search for a carrier
603 * User asked us to retune again for some reason, possibly
604 * requesting a search with a new set of parameters
605 */
606 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
607 if (fe->ops.search) {
608 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
609 /* We did do a search as was requested, the flags are
610 * now unset as well and has the flags wrt to search.
611 */
612 } else {
613 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
614 }
615 }
616 /* Track the carrier if the search was successful */
617 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
618 if (fe->ops.track)
619 fe->ops.track(fe, &fepriv->parameters);
620 } else {
621 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
622 fepriv->delay = HZ / 2;
623 }
624 fe->ops.read_status(fe, &s);
625 if (s != fepriv->status) {
626 dvb_frontend_add_event(fe, s); /* update event list */
627 fepriv->status = s;
628 if (!(s & FE_HAS_LOCK)) {
629 fepriv->delay = HZ / 10;
630 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
631 } else {
632 fepriv->delay = 60 * HZ;
633 }
634 }
635 break;
636 default:
637 dprintk("%s: UNDEFINED ALGO !\n", __func__);
638 break;
639 }
640 } else {
641 dvb_frontend_swzigzag(fe);
642 }
643 }
644
645 if (dvb_powerdown_on_sleep) {
646 if (fe->ops.set_voltage)
647 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
648 if (fe->ops.tuner_ops.sleep) {
649 if (fe->ops.i2c_gate_ctrl)
650 fe->ops.i2c_gate_ctrl(fe, 1);
651 fe->ops.tuner_ops.sleep(fe);
652 if (fe->ops.i2c_gate_ctrl)
653 fe->ops.i2c_gate_ctrl(fe, 0);
654 }
655 if (fe->ops.sleep)
656 fe->ops.sleep(fe);
657 }
658
659 fepriv->thread = NULL;
660 fepriv->exit = 0;
661 mb();
662
663 dvb_frontend_wakeup(fe);
664 return 0;
665 }
666
667 static void dvb_frontend_stop(struct dvb_frontend *fe)
668 {
669 struct dvb_frontend_private *fepriv = fe->frontend_priv;
670
671 dprintk ("%s\n", __func__);
672
673 fepriv->exit = 1;
674 mb();
675
676 if (!fepriv->thread)
677 return;
678
679 kthread_stop(fepriv->thread);
680
681 init_MUTEX (&fepriv->sem);
682 fepriv->state = FESTATE_IDLE;
683
684 /* paranoia check in case a signal arrived */
685 if (fepriv->thread)
686 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
687 fepriv->thread);
688 }
689
690 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
691 {
692 return ((curtime.tv_usec < lasttime.tv_usec) ?
693 1000000 - lasttime.tv_usec + curtime.tv_usec :
694 curtime.tv_usec - lasttime.tv_usec);
695 }
696 EXPORT_SYMBOL(timeval_usec_diff);
697
698 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
699 {
700 curtime->tv_usec += add_usec;
701 if (curtime->tv_usec >= 1000000) {
702 curtime->tv_usec -= 1000000;
703 curtime->tv_sec++;
704 }
705 }
706
707 /*
708 * Sleep until gettimeofday() > waketime + add_usec
709 * This needs to be as precise as possible, but as the delay is
710 * usually between 2ms and 32ms, it is done using a scheduled msleep
711 * followed by usleep (normally a busy-wait loop) for the remainder
712 */
713 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
714 {
715 struct timeval lasttime;
716 s32 delta, newdelta;
717
718 timeval_usec_add(waketime, add_usec);
719
720 do_gettimeofday(&lasttime);
721 delta = timeval_usec_diff(lasttime, *waketime);
722 if (delta > 2500) {
723 msleep((delta - 1500) / 1000);
724 do_gettimeofday(&lasttime);
725 newdelta = timeval_usec_diff(lasttime, *waketime);
726 delta = (newdelta > delta) ? 0 : newdelta;
727 }
728 if (delta > 0)
729 udelay(delta);
730 }
731 EXPORT_SYMBOL(dvb_frontend_sleep_until);
732
733 static int dvb_frontend_start(struct dvb_frontend *fe)
734 {
735 int ret;
736 struct dvb_frontend_private *fepriv = fe->frontend_priv;
737 struct task_struct *fe_thread;
738
739 dprintk ("%s\n", __func__);
740
741 if (fepriv->thread) {
742 if (!fepriv->exit)
743 return 0;
744 else
745 dvb_frontend_stop (fe);
746 }
747
748 if (signal_pending(current))
749 return -EINTR;
750 if (down_interruptible (&fepriv->sem))
751 return -EINTR;
752
753 fepriv->state = FESTATE_IDLE;
754 fepriv->exit = 0;
755 fepriv->thread = NULL;
756 mb();
757
758 fe_thread = kthread_run(dvb_frontend_thread, fe,
759 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
760 if (IS_ERR(fe_thread)) {
761 ret = PTR_ERR(fe_thread);
762 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
763 up(&fepriv->sem);
764 return ret;
765 }
766 fepriv->thread = fe_thread;
767 return 0;
768 }
769
770 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
771 u32 *freq_min, u32 *freq_max)
772 {
773 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
774
775 if (fe->ops.info.frequency_max == 0)
776 *freq_max = fe->ops.tuner_ops.info.frequency_max;
777 else if (fe->ops.tuner_ops.info.frequency_max == 0)
778 *freq_max = fe->ops.info.frequency_max;
779 else
780 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
781
782 if (*freq_min == 0 || *freq_max == 0)
783 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
784 fe->dvb->num,fe->id);
785 }
786
787 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
788 struct dvb_frontend_parameters *parms)
789 {
790 u32 freq_min;
791 u32 freq_max;
792
793 /* range check: frequency */
794 dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
795 if ((freq_min && parms->frequency < freq_min) ||
796 (freq_max && parms->frequency > freq_max)) {
797 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
798 fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
799 return -EINVAL;
800 }
801
802 /* range check: symbol rate */
803 if (fe->ops.info.type == FE_QPSK) {
804 if ((fe->ops.info.symbol_rate_min &&
805 parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
806 (fe->ops.info.symbol_rate_max &&
807 parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
808 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
809 fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
810 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
811 return -EINVAL;
812 }
813
814 } else if (fe->ops.info.type == FE_QAM) {
815 if ((fe->ops.info.symbol_rate_min &&
816 parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
817 (fe->ops.info.symbol_rate_max &&
818 parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
819 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
820 fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
821 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
822 return -EINVAL;
823 }
824 }
825
826 return 0;
827 }
828
829 static struct dtv_cmds_h dtv_cmds[] = {
830 [DTV_TUNE] = {
831 .name = "DTV_TUNE",
832 .cmd = DTV_TUNE,
833 .set = 1,
834 },
835 [DTV_CLEAR] = {
836 .name = "DTV_CLEAR",
837 .cmd = DTV_CLEAR,
838 .set = 1,
839 },
840
841 /* Set */
842 [DTV_FREQUENCY] = {
843 .name = "DTV_FREQUENCY",
844 .cmd = DTV_FREQUENCY,
845 .set = 1,
846 },
847 [DTV_BANDWIDTH_HZ] = {
848 .name = "DTV_BANDWIDTH_HZ",
849 .cmd = DTV_BANDWIDTH_HZ,
850 .set = 1,
851 },
852 [DTV_MODULATION] = {
853 .name = "DTV_MODULATION",
854 .cmd = DTV_MODULATION,
855 .set = 1,
856 },
857 [DTV_INVERSION] = {
858 .name = "DTV_INVERSION",
859 .cmd = DTV_INVERSION,
860 .set = 1,
861 },
862 [DTV_DISEQC_MASTER] = {
863 .name = "DTV_DISEQC_MASTER",
864 .cmd = DTV_DISEQC_MASTER,
865 .set = 1,
866 .buffer = 1,
867 },
868 [DTV_SYMBOL_RATE] = {
869 .name = "DTV_SYMBOL_RATE",
870 .cmd = DTV_SYMBOL_RATE,
871 .set = 1,
872 },
873 [DTV_INNER_FEC] = {
874 .name = "DTV_INNER_FEC",
875 .cmd = DTV_INNER_FEC,
876 .set = 1,
877 },
878 [DTV_VOLTAGE] = {
879 .name = "DTV_VOLTAGE",
880 .cmd = DTV_VOLTAGE,
881 .set = 1,
882 },
883 [DTV_TONE] = {
884 .name = "DTV_TONE",
885 .cmd = DTV_TONE,
886 .set = 1,
887 },
888 [DTV_PILOT] = {
889 .name = "DTV_PILOT",
890 .cmd = DTV_PILOT,
891 .set = 1,
892 },
893 [DTV_ROLLOFF] = {
894 .name = "DTV_ROLLOFF",
895 .cmd = DTV_ROLLOFF,
896 .set = 1,
897 },
898 [DTV_DELIVERY_SYSTEM] = {
899 .name = "DTV_DELIVERY_SYSTEM",
900 .cmd = DTV_DELIVERY_SYSTEM,
901 .set = 1,
902 },
903 [DTV_HIERARCHY] = {
904 .name = "DTV_HIERARCHY",
905 .cmd = DTV_HIERARCHY,
906 .set = 1,
907 },
908 [DTV_CODE_RATE_HP] = {
909 .name = "DTV_CODE_RATE_HP",
910 .cmd = DTV_CODE_RATE_HP,
911 .set = 1,
912 },
913 [DTV_CODE_RATE_LP] = {
914 .name = "DTV_CODE_RATE_LP",
915 .cmd = DTV_CODE_RATE_LP,
916 .set = 1,
917 },
918 [DTV_GUARD_INTERVAL] = {
919 .name = "DTV_GUARD_INTERVAL",
920 .cmd = DTV_GUARD_INTERVAL,
921 .set = 1,
922 },
923 [DTV_TRANSMISSION_MODE] = {
924 .name = "DTV_TRANSMISSION_MODE",
925 .cmd = DTV_TRANSMISSION_MODE,
926 .set = 1,
927 },
928 /* Get */
929 [DTV_DISEQC_SLAVE_REPLY] = {
930 .name = "DTV_DISEQC_SLAVE_REPLY",
931 .cmd = DTV_DISEQC_SLAVE_REPLY,
932 .set = 0,
933 .buffer = 1,
934 },
935 [DTV_API_VERSION] = {
936 .name = "DTV_API_VERSION",
937 .cmd = DTV_API_VERSION,
938 .set = 0,
939 },
940 [DTV_CODE_RATE_HP] = {
941 .name = "DTV_CODE_RATE_HP",
942 .cmd = DTV_CODE_RATE_HP,
943 .set = 0,
944 },
945 [DTV_CODE_RATE_LP] = {
946 .name = "DTV_CODE_RATE_LP",
947 .cmd = DTV_CODE_RATE_LP,
948 .set = 0,
949 },
950 [DTV_GUARD_INTERVAL] = {
951 .name = "DTV_GUARD_INTERVAL",
952 .cmd = DTV_GUARD_INTERVAL,
953 .set = 0,
954 },
955 [DTV_TRANSMISSION_MODE] = {
956 .name = "DTV_TRANSMISSION_MODE",
957 .cmd = DTV_TRANSMISSION_MODE,
958 .set = 0,
959 },
960 [DTV_HIERARCHY] = {
961 .name = "DTV_HIERARCHY",
962 .cmd = DTV_HIERARCHY,
963 .set = 0,
964 },
965 };
966
967 static void dtv_property_dump(struct dtv_property *tvp)
968 {
969 int i;
970
971 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
972 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
973 __func__, tvp->cmd);
974 return;
975 }
976
977 dprintk("%s() tvp.cmd = 0x%08x (%s)\n"
978 ,__func__
979 ,tvp->cmd
980 ,dtv_cmds[ tvp->cmd ].name);
981
982 if(dtv_cmds[ tvp->cmd ].buffer) {
983
984 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
985 ,__func__
986 ,tvp->u.buffer.len);
987
988 for(i = 0; i < tvp->u.buffer.len; i++)
989 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
990 ,__func__
991 ,i
992 ,tvp->u.buffer.data[i]);
993
994 } else
995 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
996 }
997
998 static int is_legacy_delivery_system(fe_delivery_system_t s)
999 {
1000 if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1001 (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1002 (s == SYS_ATSC))
1003 return 1;
1004
1005 return 0;
1006 }
1007
1008 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1009 * drivers can use a single set_frontend tuning function, regardless of whether
1010 * it's being used for the legacy or new API, reducing code and complexity.
1011 */
1012 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1013 struct dvb_frontend_parameters *p)
1014 {
1015 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1016
1017 c->frequency = p->frequency;
1018 c->inversion = p->inversion;
1019
1020 switch (fe->ops.info.type) {
1021 case FE_QPSK:
1022 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1023 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1024 c->symbol_rate = p->u.qpsk.symbol_rate;
1025 c->fec_inner = p->u.qpsk.fec_inner;
1026 c->delivery_system = SYS_DVBS;
1027 break;
1028 case FE_QAM:
1029 c->symbol_rate = p->u.qam.symbol_rate;
1030 c->fec_inner = p->u.qam.fec_inner;
1031 c->modulation = p->u.qam.modulation;
1032 c->delivery_system = SYS_DVBC_ANNEX_AC;
1033 break;
1034 case FE_OFDM:
1035 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1036 c->bandwidth_hz = 6000000;
1037 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1038 c->bandwidth_hz = 7000000;
1039 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1040 c->bandwidth_hz = 8000000;
1041 else
1042 /* Including BANDWIDTH_AUTO */
1043 c->bandwidth_hz = 0;
1044 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1045 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1046 c->modulation = p->u.ofdm.constellation;
1047 c->transmission_mode = p->u.ofdm.transmission_mode;
1048 c->guard_interval = p->u.ofdm.guard_interval;
1049 c->hierarchy = p->u.ofdm.hierarchy_information;
1050 c->delivery_system = SYS_DVBT;
1051 break;
1052 case FE_ATSC:
1053 c->modulation = p->u.vsb.modulation;
1054 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1055 c->delivery_system = SYS_ATSC;
1056 else
1057 c->delivery_system = SYS_DVBC_ANNEX_B;
1058 break;
1059 }
1060 }
1061
1062 /* Ensure the cached values are set correctly in the frontend
1063 * legacy tuning structures, for the advanced tuning API.
1064 */
1065 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1066 {
1067 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1068 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1069 struct dvb_frontend_parameters *p = &fepriv->parameters;
1070
1071 p->frequency = c->frequency;
1072 p->inversion = c->inversion;
1073
1074 switch (fe->ops.info.type) {
1075 case FE_QPSK:
1076 dprintk("%s() Preparing QPSK req\n", __func__);
1077 p->u.qpsk.symbol_rate = c->symbol_rate;
1078 p->u.qpsk.fec_inner = c->fec_inner;
1079 c->delivery_system = SYS_DVBS;
1080 break;
1081 case FE_QAM:
1082 dprintk("%s() Preparing QAM req\n", __func__);
1083 p->u.qam.symbol_rate = c->symbol_rate;
1084 p->u.qam.fec_inner = c->fec_inner;
1085 p->u.qam.modulation = c->modulation;
1086 c->delivery_system = SYS_DVBC_ANNEX_AC;
1087 break;
1088 case FE_OFDM:
1089 dprintk("%s() Preparing OFDM req\n", __func__);
1090 if (c->bandwidth_hz == 6000000)
1091 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1092 else if (c->bandwidth_hz == 7000000)
1093 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1094 else if (c->bandwidth_hz == 8000000)
1095 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1096 else
1097 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1098 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1099 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1100 p->u.ofdm.constellation = c->modulation;
1101 p->u.ofdm.transmission_mode = c->transmission_mode;
1102 p->u.ofdm.guard_interval = c->guard_interval;
1103 p->u.ofdm.hierarchy_information = c->hierarchy;
1104 c->delivery_system = SYS_DVBT;
1105 break;
1106 case FE_ATSC:
1107 dprintk("%s() Preparing VSB req\n", __func__);
1108 p->u.vsb.modulation = c->modulation;
1109 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1110 c->delivery_system = SYS_ATSC;
1111 else
1112 c->delivery_system = SYS_DVBC_ANNEX_B;
1113 break;
1114 }
1115 }
1116
1117 /* Ensure the cached values are set correctly in the frontend
1118 * legacy tuning structures, for the legacy tuning API.
1119 */
1120 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1121 {
1122 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1123 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1124 struct dvb_frontend_parameters *p = &fepriv->parameters;
1125
1126 p->frequency = c->frequency;
1127 p->inversion = c->inversion;
1128
1129 switch(c->modulation) {
1130 case PSK_8:
1131 case APSK_16:
1132 case APSK_32:
1133 case QPSK:
1134 p->u.qpsk.symbol_rate = c->symbol_rate;
1135 p->u.qpsk.fec_inner = c->fec_inner;
1136 break;
1137 default:
1138 break;
1139 }
1140
1141 if(c->delivery_system == SYS_ISDBT) {
1142 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1143 p->frequency = c->frequency;
1144 p->inversion = INVERSION_AUTO;
1145 p->u.ofdm.constellation = QAM_AUTO;
1146 p->u.ofdm.code_rate_HP = FEC_AUTO;
1147 p->u.ofdm.code_rate_LP = FEC_AUTO;
1148 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1149 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1150 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1151 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1152 }
1153 }
1154
1155 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1156 {
1157 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1158
1159 /* For legacy delivery systems we don't need the delivery_system to
1160 * be specified, but we populate the older structures from the cache
1161 * so we can call set_frontend on older drivers.
1162 */
1163 if(is_legacy_delivery_system(c->delivery_system)) {
1164
1165 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1166 dtv_property_legacy_params_sync(fe);
1167
1168 } else {
1169 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1170
1171 /* For advanced delivery systems / modulation types ...
1172 * we seed the lecacy dvb_frontend_parameters structure
1173 * so that the sanity checking code later in the IOCTL processing
1174 * can validate our basic frequency ranges, symbolrates, modulation
1175 * etc.
1176 */
1177 dtv_property_adv_params_sync(fe);
1178 }
1179 }
1180
1181 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1182 unsigned int cmd, void *parg);
1183 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1184 unsigned int cmd, void *parg);
1185
1186 static int dtv_property_process_get(struct dvb_frontend *fe,
1187 struct dtv_property *tvp,
1188 struct inode *inode, struct file *file)
1189 {
1190 int r = 0;
1191
1192 dtv_property_dump(tvp);
1193
1194 /* Allow the frontend to validate incoming properties */
1195 if (fe->ops.get_property)
1196 r = fe->ops.get_property(fe, tvp);
1197
1198 if (r < 0)
1199 return r;
1200
1201 switch(tvp->cmd) {
1202 case DTV_FREQUENCY:
1203 tvp->u.data = fe->dtv_property_cache.frequency;
1204 break;
1205 case DTV_MODULATION:
1206 tvp->u.data = fe->dtv_property_cache.modulation;
1207 break;
1208 case DTV_BANDWIDTH_HZ:
1209 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1210 break;
1211 case DTV_INVERSION:
1212 tvp->u.data = fe->dtv_property_cache.inversion;
1213 break;
1214 case DTV_SYMBOL_RATE:
1215 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1216 break;
1217 case DTV_INNER_FEC:
1218 tvp->u.data = fe->dtv_property_cache.fec_inner;
1219 break;
1220 case DTV_PILOT:
1221 tvp->u.data = fe->dtv_property_cache.pilot;
1222 break;
1223 case DTV_ROLLOFF:
1224 tvp->u.data = fe->dtv_property_cache.rolloff;
1225 break;
1226 case DTV_DELIVERY_SYSTEM:
1227 tvp->u.data = fe->dtv_property_cache.delivery_system;
1228 break;
1229 case DTV_VOLTAGE:
1230 tvp->u.data = fe->dtv_property_cache.voltage;
1231 break;
1232 case DTV_TONE:
1233 tvp->u.data = fe->dtv_property_cache.sectone;
1234 break;
1235 case DTV_API_VERSION:
1236 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1237 break;
1238 case DTV_CODE_RATE_HP:
1239 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1240 break;
1241 case DTV_CODE_RATE_LP:
1242 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1243 break;
1244 case DTV_GUARD_INTERVAL:
1245 tvp->u.data = fe->dtv_property_cache.guard_interval;
1246 break;
1247 case DTV_TRANSMISSION_MODE:
1248 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1249 break;
1250 case DTV_HIERARCHY:
1251 tvp->u.data = fe->dtv_property_cache.hierarchy;
1252 break;
1253 default:
1254 r = -1;
1255 }
1256
1257 return r;
1258 }
1259
1260 static int dtv_property_process_set(struct dvb_frontend *fe,
1261 struct dtv_property *tvp,
1262 struct inode *inode,
1263 struct file *file)
1264 {
1265 int r = 0;
1266 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1267 dtv_property_dump(tvp);
1268
1269 /* Allow the frontend to validate incoming properties */
1270 if (fe->ops.set_property)
1271 r = fe->ops.set_property(fe, tvp);
1272
1273 if (r < 0)
1274 return r;
1275
1276 switch(tvp->cmd) {
1277 case DTV_CLEAR:
1278 /* Reset a cache of data specific to the frontend here. This does
1279 * not effect hardware.
1280 */
1281 dprintk("%s() Flushing property cache\n", __func__);
1282 memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1283 fe->dtv_property_cache.state = tvp->cmd;
1284 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1285 break;
1286 case DTV_TUNE:
1287 /* interpret the cache of data, build either a traditional frontend
1288 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1289 * ioctl.
1290 */
1291 fe->dtv_property_cache.state = tvp->cmd;
1292 dprintk("%s() Finalised property cache\n", __func__);
1293 dtv_property_cache_submit(fe);
1294
1295 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1296 &fepriv->parameters);
1297 break;
1298 case DTV_FREQUENCY:
1299 fe->dtv_property_cache.frequency = tvp->u.data;
1300 break;
1301 case DTV_MODULATION:
1302 fe->dtv_property_cache.modulation = tvp->u.data;
1303 break;
1304 case DTV_BANDWIDTH_HZ:
1305 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1306 break;
1307 case DTV_INVERSION:
1308 fe->dtv_property_cache.inversion = tvp->u.data;
1309 break;
1310 case DTV_SYMBOL_RATE:
1311 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1312 break;
1313 case DTV_INNER_FEC:
1314 fe->dtv_property_cache.fec_inner = tvp->u.data;
1315 break;
1316 case DTV_PILOT:
1317 fe->dtv_property_cache.pilot = tvp->u.data;
1318 break;
1319 case DTV_ROLLOFF:
1320 fe->dtv_property_cache.rolloff = tvp->u.data;
1321 break;
1322 case DTV_DELIVERY_SYSTEM:
1323 fe->dtv_property_cache.delivery_system = tvp->u.data;
1324 break;
1325 case DTV_VOLTAGE:
1326 fe->dtv_property_cache.voltage = tvp->u.data;
1327 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1328 (void *)fe->dtv_property_cache.voltage);
1329 break;
1330 case DTV_TONE:
1331 fe->dtv_property_cache.sectone = tvp->u.data;
1332 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1333 (void *)fe->dtv_property_cache.sectone);
1334 break;
1335 case DTV_CODE_RATE_HP:
1336 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1337 break;
1338 case DTV_CODE_RATE_LP:
1339 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1340 break;
1341 case DTV_GUARD_INTERVAL:
1342 fe->dtv_property_cache.guard_interval = tvp->u.data;
1343 break;
1344 case DTV_TRANSMISSION_MODE:
1345 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1346 break;
1347 case DTV_HIERARCHY:
1348 fe->dtv_property_cache.hierarchy = tvp->u.data;
1349 break;
1350 default:
1351 r = -1;
1352 }
1353
1354 return r;
1355 }
1356
1357 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1358 unsigned int cmd, void *parg)
1359 {
1360 struct dvb_device *dvbdev = file->private_data;
1361 struct dvb_frontend *fe = dvbdev->priv;
1362 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1363 int err = -EOPNOTSUPP;
1364
1365 dprintk ("%s\n", __func__);
1366
1367 if (fepriv->exit)
1368 return -ENODEV;
1369
1370 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1371 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1372 cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1373 return -EPERM;
1374
1375 if (down_interruptible (&fepriv->sem))
1376 return -ERESTARTSYS;
1377
1378 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1379 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1380 else {
1381 fe->dtv_property_cache.state = DTV_UNDEFINED;
1382 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1383 }
1384
1385 up(&fepriv->sem);
1386 return err;
1387 }
1388
1389 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1390 unsigned int cmd, void *parg)
1391 {
1392 struct dvb_device *dvbdev = file->private_data;
1393 struct dvb_frontend *fe = dvbdev->priv;
1394 int err = 0;
1395
1396 struct dtv_properties *tvps = NULL;
1397 struct dtv_property *tvp = NULL;
1398 int i;
1399
1400 dprintk("%s\n", __func__);
1401
1402 if(cmd == FE_SET_PROPERTY) {
1403 tvps = (struct dtv_properties __user *)parg;
1404
1405 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1406 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1407
1408 /* Put an arbitrary limit on the number of messages that can
1409 * be sent at once */
1410 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1411 return -EINVAL;
1412
1413 tvp = (struct dtv_property *) kmalloc(tvps->num *
1414 sizeof(struct dtv_property), GFP_KERNEL);
1415 if (!tvp) {
1416 err = -ENOMEM;
1417 goto out;
1418 }
1419
1420 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1421 err = -EFAULT;
1422 goto out;
1423 }
1424
1425 for (i = 0; i < tvps->num; i++) {
1426 (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1427 err |= (tvp + i)->result;
1428 }
1429
1430 if(fe->dtv_property_cache.state == DTV_TUNE)
1431 dprintk("%s() Property cache is full, tuning\n", __func__);
1432
1433 } else
1434 if(cmd == FE_GET_PROPERTY) {
1435
1436 tvps = (struct dtv_properties __user *)parg;
1437
1438 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1439 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1440
1441 /* Put an arbitrary limit on the number of messages that can
1442 * be sent at once */
1443 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1444 return -EINVAL;
1445
1446 tvp = (struct dtv_property *) kmalloc(tvps->num *
1447 sizeof(struct dtv_property), GFP_KERNEL);
1448 if (!tvp) {
1449 err = -ENOMEM;
1450 goto out;
1451 }
1452
1453 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1454 err = -EFAULT;
1455 goto out;
1456 }
1457
1458 for (i = 0; i < tvps->num; i++) {
1459 (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1460 err |= (tvp + i)->result;
1461 }
1462
1463 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1464 err = -EFAULT;
1465 goto out;
1466 }
1467
1468 } else
1469 err = -EOPNOTSUPP;
1470
1471 out:
1472 kfree(tvp);
1473 return err;
1474 }
1475
1476 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1477 unsigned int cmd, void *parg)
1478 {
1479 struct dvb_device *dvbdev = file->private_data;
1480 struct dvb_frontend *fe = dvbdev->priv;
1481 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1482 int err = -EOPNOTSUPP;
1483
1484 switch (cmd) {
1485 case FE_GET_INFO: {
1486 struct dvb_frontend_info* info = parg;
1487 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1488 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1489
1490 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1491 * do it, it is done for it. */
1492 info->caps |= FE_CAN_INVERSION_AUTO;
1493 err = 0;
1494 break;
1495 }
1496
1497 case FE_READ_STATUS: {
1498 fe_status_t* status = parg;
1499
1500 /* if retune was requested but hasn't occured yet, prevent
1501 * that user get signal state from previous tuning */
1502 if(fepriv->state == FESTATE_RETUNE) {
1503 err=0;
1504 *status = 0;
1505 break;
1506 }
1507
1508 if (fe->ops.read_status)
1509 err = fe->ops.read_status(fe, status);
1510 break;
1511 }
1512 case FE_READ_BER:
1513 if (fe->ops.read_ber)
1514 err = fe->ops.read_ber(fe, (__u32*) parg);
1515 break;
1516
1517 case FE_READ_SIGNAL_STRENGTH:
1518 if (fe->ops.read_signal_strength)
1519 err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1520 break;
1521
1522 case FE_READ_SNR:
1523 if (fe->ops.read_snr)
1524 err = fe->ops.read_snr(fe, (__u16*) parg);
1525 break;
1526
1527 case FE_READ_UNCORRECTED_BLOCKS:
1528 if (fe->ops.read_ucblocks)
1529 err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1530 break;
1531
1532
1533 case FE_DISEQC_RESET_OVERLOAD:
1534 if (fe->ops.diseqc_reset_overload) {
1535 err = fe->ops.diseqc_reset_overload(fe);
1536 fepriv->state = FESTATE_DISEQC;
1537 fepriv->status = 0;
1538 }
1539 break;
1540
1541 case FE_DISEQC_SEND_MASTER_CMD:
1542 if (fe->ops.diseqc_send_master_cmd) {
1543 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1544 fepriv->state = FESTATE_DISEQC;
1545 fepriv->status = 0;
1546 }
1547 break;
1548
1549 case FE_DISEQC_SEND_BURST:
1550 if (fe->ops.diseqc_send_burst) {
1551 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1552 fepriv->state = FESTATE_DISEQC;
1553 fepriv->status = 0;
1554 }
1555 break;
1556
1557 case FE_SET_TONE:
1558 if (fe->ops.set_tone) {
1559 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1560 fepriv->tone = (fe_sec_tone_mode_t) parg;
1561 fepriv->state = FESTATE_DISEQC;
1562 fepriv->status = 0;
1563 }
1564 break;
1565
1566 case FE_SET_VOLTAGE:
1567 if (fe->ops.set_voltage) {
1568 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1569 fepriv->voltage = (fe_sec_voltage_t) parg;
1570 fepriv->state = FESTATE_DISEQC;
1571 fepriv->status = 0;
1572 }
1573 break;
1574
1575 case FE_DISHNETWORK_SEND_LEGACY_CMD:
1576 if (fe->ops.dishnetwork_send_legacy_command) {
1577 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1578 fepriv->state = FESTATE_DISEQC;
1579 fepriv->status = 0;
1580 } else if (fe->ops.set_voltage) {
1581 /*
1582 * NOTE: This is a fallback condition. Some frontends
1583 * (stv0299 for instance) take longer than 8msec to
1584 * respond to a set_voltage command. Those switches
1585 * need custom routines to switch properly. For all
1586 * other frontends, the following shoule work ok.
1587 * Dish network legacy switches (as used by Dish500)
1588 * are controlled by sending 9-bit command words
1589 * spaced 8msec apart.
1590 * the actual command word is switch/port dependant
1591 * so it is up to the userspace application to send
1592 * the right command.
1593 * The command must always start with a '0' after
1594 * initialization, so parg is 8 bits and does not
1595 * include the initialization or start bit
1596 */
1597 unsigned long swcmd = ((unsigned long) parg) << 1;
1598 struct timeval nexttime;
1599 struct timeval tv[10];
1600 int i;
1601 u8 last = 1;
1602 if (dvb_frontend_debug)
1603 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1604 do_gettimeofday(&nexttime);
1605 if (dvb_frontend_debug)
1606 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1607 /* before sending a command, initialize by sending
1608 * a 32ms 18V to the switch
1609 */
1610 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1611 dvb_frontend_sleep_until(&nexttime, 32000);
1612
1613 for (i = 0; i < 9; i++) {
1614 if (dvb_frontend_debug)
1615 do_gettimeofday(&tv[i + 1]);
1616 if ((swcmd & 0x01) != last) {
1617 /* set voltage to (last ? 13V : 18V) */
1618 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1619 last = (last) ? 0 : 1;
1620 }
1621 swcmd = swcmd >> 1;
1622 if (i != 8)
1623 dvb_frontend_sleep_until(&nexttime, 8000);
1624 }
1625 if (dvb_frontend_debug) {
1626 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1627 __func__, fe->dvb->num);
1628 for (i = 1; i < 10; i++)
1629 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1630 }
1631 err = 0;
1632 fepriv->state = FESTATE_DISEQC;
1633 fepriv->status = 0;
1634 }
1635 break;
1636
1637 case FE_DISEQC_RECV_SLAVE_REPLY:
1638 if (fe->ops.diseqc_recv_slave_reply)
1639 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1640 break;
1641
1642 case FE_ENABLE_HIGH_LNB_VOLTAGE:
1643 if (fe->ops.enable_high_lnb_voltage)
1644 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1645 break;
1646
1647 case FE_SET_FRONTEND: {
1648 struct dvb_frontend_tune_settings fetunesettings;
1649
1650 if(fe->dtv_property_cache.state == DTV_TUNE) {
1651 if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1652 err = -EINVAL;
1653 break;
1654 }
1655 } else {
1656 if (dvb_frontend_check_parameters(fe, parg) < 0) {
1657 err = -EINVAL;
1658 break;
1659 }
1660
1661 memcpy (&fepriv->parameters, parg,
1662 sizeof (struct dvb_frontend_parameters));
1663 dtv_property_cache_sync(fe, &fepriv->parameters);
1664 }
1665
1666 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1667 memcpy(&fetunesettings.parameters, parg,
1668 sizeof (struct dvb_frontend_parameters));
1669
1670 /* force auto frequency inversion if requested */
1671 if (dvb_force_auto_inversion) {
1672 fepriv->parameters.inversion = INVERSION_AUTO;
1673 fetunesettings.parameters.inversion = INVERSION_AUTO;
1674 }
1675 if (fe->ops.info.type == FE_OFDM) {
1676 /* without hierarchical coding code_rate_LP is irrelevant,
1677 * so we tolerate the otherwise invalid FEC_NONE setting */
1678 if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1679 fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1680 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1681 }
1682
1683 /* get frontend-specific tuning settings */
1684 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1685 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1686 fepriv->max_drift = fetunesettings.max_drift;
1687 fepriv->step_size = fetunesettings.step_size;
1688 } else {
1689 /* default values */
1690 switch(fe->ops.info.type) {
1691 case FE_QPSK:
1692 fepriv->min_delay = HZ/20;
1693 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1694 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1695 break;
1696
1697 case FE_QAM:
1698 fepriv->min_delay = HZ/20;
1699 fepriv->step_size = 0; /* no zigzag */
1700 fepriv->max_drift = 0;
1701 break;
1702
1703 case FE_OFDM:
1704 fepriv->min_delay = HZ/20;
1705 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1706 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1707 break;
1708 case FE_ATSC:
1709 fepriv->min_delay = HZ/20;
1710 fepriv->step_size = 0;
1711 fepriv->max_drift = 0;
1712 break;
1713 }
1714 }
1715 if (dvb_override_tune_delay > 0)
1716 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1717
1718 fepriv->state = FESTATE_RETUNE;
1719
1720 /* Request the search algorithm to search */
1721 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1722
1723 dvb_frontend_wakeup(fe);
1724 dvb_frontend_add_event(fe, 0);
1725 fepriv->status = 0;
1726 err = 0;
1727 break;
1728 }
1729
1730 case FE_GET_EVENT:
1731 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1732 break;
1733
1734 case FE_GET_FRONTEND:
1735 if (fe->ops.get_frontend) {
1736 memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1737 err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1738 }
1739 break;
1740
1741 case FE_SET_FRONTEND_TUNE_MODE:
1742 fepriv->tune_mode_flags = (unsigned long) parg;
1743 err = 0;
1744 break;
1745 };
1746
1747 return err;
1748 }
1749
1750
1751 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1752 {
1753 struct dvb_device *dvbdev = file->private_data;
1754 struct dvb_frontend *fe = dvbdev->priv;
1755 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1756
1757 dprintk ("%s\n", __func__);
1758
1759 poll_wait (file, &fepriv->events.wait_queue, wait);
1760
1761 if (fepriv->events.eventw != fepriv->events.eventr)
1762 return (POLLIN | POLLRDNORM | POLLPRI);
1763
1764 return 0;
1765 }
1766
1767 static int dvb_frontend_open(struct inode *inode, struct file *file)
1768 {
1769 struct dvb_device *dvbdev = file->private_data;
1770 struct dvb_frontend *fe = dvbdev->priv;
1771 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1772 struct dvb_adapter *adapter = fe->dvb;
1773 int ret;
1774
1775 dprintk ("%s\n", __func__);
1776
1777 if (adapter->mfe_shared) {
1778 mutex_lock (&adapter->mfe_lock);
1779
1780 if (adapter->mfe_dvbdev == NULL)
1781 adapter->mfe_dvbdev = dvbdev;
1782
1783 else if (adapter->mfe_dvbdev != dvbdev) {
1784 struct dvb_device
1785 *mfedev = adapter->mfe_dvbdev;
1786 struct dvb_frontend
1787 *mfe = mfedev->priv;
1788 struct dvb_frontend_private
1789 *mfepriv = mfe->frontend_priv;
1790 int mferetry = (dvb_mfe_wait_time << 1);
1791
1792 mutex_unlock (&adapter->mfe_lock);
1793 while (mferetry-- && (mfedev->users != -1 ||
1794 mfepriv->thread != NULL)) {
1795 if(msleep_interruptible(500)) {
1796 if(signal_pending(current))
1797 return -EINTR;
1798 }
1799 }
1800
1801 mutex_lock (&adapter->mfe_lock);
1802 if(adapter->mfe_dvbdev != dvbdev) {
1803 mfedev = adapter->mfe_dvbdev;
1804 mfe = mfedev->priv;
1805 mfepriv = mfe->frontend_priv;
1806 if (mfedev->users != -1 ||
1807 mfepriv->thread != NULL) {
1808 mutex_unlock (&adapter->mfe_lock);
1809 return -EBUSY;
1810 }
1811 adapter->mfe_dvbdev = dvbdev;
1812 }
1813 }
1814 }
1815
1816 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1817 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1818 goto err0;
1819 }
1820
1821 if ((ret = dvb_generic_open (inode, file)) < 0)
1822 goto err1;
1823
1824 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1825 /* normal tune mode when opened R/W */
1826 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1827 fepriv->tone = -1;
1828 fepriv->voltage = -1;
1829
1830 ret = dvb_frontend_start (fe);
1831 if (ret)
1832 goto err2;
1833
1834 /* empty event queue */
1835 fepriv->events.eventr = fepriv->events.eventw = 0;
1836 }
1837
1838 if (adapter->mfe_shared)
1839 mutex_unlock (&adapter->mfe_lock);
1840 return ret;
1841
1842 err2:
1843 dvb_generic_release(inode, file);
1844 err1:
1845 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1846 fe->ops.ts_bus_ctrl(fe, 0);
1847 err0:
1848 if (adapter->mfe_shared)
1849 mutex_unlock (&adapter->mfe_lock);
1850 return ret;
1851 }
1852
1853 static int dvb_frontend_release(struct inode *inode, struct file *file)
1854 {
1855 struct dvb_device *dvbdev = file->private_data;
1856 struct dvb_frontend *fe = dvbdev->priv;
1857 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1858 int ret;
1859
1860 dprintk ("%s\n", __func__);
1861
1862 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
1863 fepriv->release_jiffies = jiffies;
1864
1865 ret = dvb_generic_release (inode, file);
1866
1867 if (dvbdev->users == -1) {
1868 if (fepriv->exit == 1) {
1869 fops_put(file->f_op);
1870 file->f_op = NULL;
1871 wake_up(&dvbdev->wait_queue);
1872 }
1873 if (fe->ops.ts_bus_ctrl)
1874 fe->ops.ts_bus_ctrl(fe, 0);
1875 }
1876
1877 return ret;
1878 }
1879
1880 static const struct file_operations dvb_frontend_fops = {
1881 .owner = THIS_MODULE,
1882 .ioctl = dvb_generic_ioctl,
1883 .poll = dvb_frontend_poll,
1884 .open = dvb_frontend_open,
1885 .release = dvb_frontend_release
1886 };
1887
1888 int dvb_register_frontend(struct dvb_adapter* dvb,
1889 struct dvb_frontend* fe)
1890 {
1891 struct dvb_frontend_private *fepriv;
1892 static const struct dvb_device dvbdev_template = {
1893 .users = ~0,
1894 .writers = 1,
1895 .readers = (~0)-1,
1896 .fops = &dvb_frontend_fops,
1897 .kernel_ioctl = dvb_frontend_ioctl
1898 };
1899
1900 dprintk ("%s\n", __func__);
1901
1902 if (mutex_lock_interruptible(&frontend_mutex))
1903 return -ERESTARTSYS;
1904
1905 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
1906 if (fe->frontend_priv == NULL) {
1907 mutex_unlock(&frontend_mutex);
1908 return -ENOMEM;
1909 }
1910 fepriv = fe->frontend_priv;
1911
1912 init_MUTEX (&fepriv->sem);
1913 init_waitqueue_head (&fepriv->wait_queue);
1914 init_waitqueue_head (&fepriv->events.wait_queue);
1915 mutex_init(&fepriv->events.mtx);
1916 fe->dvb = dvb;
1917 fepriv->inversion = INVERSION_OFF;
1918
1919 printk ("DVB: registering adapter %i frontend %i (%s)...\n",
1920 fe->dvb->num,
1921 fe->id,
1922 fe->ops.info.name);
1923
1924 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
1925 fe, DVB_DEVICE_FRONTEND);
1926
1927 mutex_unlock(&frontend_mutex);
1928 return 0;
1929 }
1930 EXPORT_SYMBOL(dvb_register_frontend);
1931
1932 int dvb_unregister_frontend(struct dvb_frontend* fe)
1933 {
1934 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1935 dprintk ("%s\n", __func__);
1936
1937 mutex_lock(&frontend_mutex);
1938 dvb_frontend_stop (fe);
1939 mutex_unlock(&frontend_mutex);
1940
1941 if (fepriv->dvbdev->users < -1)
1942 wait_event(fepriv->dvbdev->wait_queue,
1943 fepriv->dvbdev->users==-1);
1944
1945 mutex_lock(&frontend_mutex);
1946 dvb_unregister_device (fepriv->dvbdev);
1947
1948 /* fe is invalid now */
1949 kfree(fepriv);
1950 mutex_unlock(&frontend_mutex);
1951 return 0;
1952 }
1953 EXPORT_SYMBOL(dvb_unregister_frontend);
1954
1955 #ifdef CONFIG_MEDIA_ATTACH
1956 void dvb_frontend_detach(struct dvb_frontend* fe)
1957 {
1958 void *ptr;
1959
1960 if (fe->ops.release_sec) {
1961 fe->ops.release_sec(fe);
1962 symbol_put_addr(fe->ops.release_sec);
1963 }
1964 if (fe->ops.tuner_ops.release) {
1965 fe->ops.tuner_ops.release(fe);
1966 symbol_put_addr(fe->ops.tuner_ops.release);
1967 }
1968 if (fe->ops.analog_ops.release) {
1969 fe->ops.analog_ops.release(fe);
1970 symbol_put_addr(fe->ops.analog_ops.release);
1971 }
1972 ptr = (void*)fe->ops.release;
1973 if (ptr) {
1974 fe->ops.release(fe);
1975 symbol_put_addr(ptr);
1976 }
1977 }
1978 #else
1979 void dvb_frontend_detach(struct dvb_frontend* fe)
1980 {
1981 if (fe->ops.release_sec)
1982 fe->ops.release_sec(fe);
1983 if (fe->ops.tuner_ops.release)
1984 fe->ops.tuner_ops.release(fe);
1985 if (fe->ops.analog_ops.release)
1986 fe->ops.analog_ops.release(fe);
1987 if (fe->ops.release)
1988 fe->ops.release(fe);
1989 }
1990 #endif
1991 EXPORT_SYMBOL(dvb_frontend_detach);