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ext3: Update MAINTAINERS for ext3 and JBD
[linux/fpc-iii.git] / drivers / media / dvb / dvb-core / dvb_frontend.c
blobd13ebcb0c6b650f5dda000631f4985c7d7bcb171
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_ERROR 256
76 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
77 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
78 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
79 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
80
81 #define FE_ALGO_HW 1
82 /*
83 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
84 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
85 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
86 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
87 * FESTATE_TUNED. The frontend has successfully locked on.
88 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
89 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
90 * FESTATE_DISEQC. A DISEQC command has just been issued.
91 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
92 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
93 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
94 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
95 */
96
97 static DEFINE_MUTEX(frontend_mutex);
98
99 struct dvb_frontend_private {
100
101 /* thread/frontend values */
102 struct dvb_device *dvbdev;
103 struct dvb_frontend_parameters parameters;
104 struct dvb_fe_events events;
105 struct semaphore sem;
106 struct list_head list_head;
107 wait_queue_head_t wait_queue;
108 struct task_struct *thread;
109 unsigned long release_jiffies;
110 unsigned int exit;
111 unsigned int wakeup;
112 fe_status_t status;
113 unsigned long tune_mode_flags;
114 unsigned int delay;
115 unsigned int reinitialise;
116 int tone;
117 int voltage;
118
119 /* swzigzag values */
120 unsigned int state;
121 unsigned int bending;
122 int lnb_drift;
123 unsigned int inversion;
124 unsigned int auto_step;
125 unsigned int auto_sub_step;
126 unsigned int started_auto_step;
127 unsigned int min_delay;
128 unsigned int max_drift;
129 unsigned int step_size;
130 int quality;
131 unsigned int check_wrapped;
132 enum dvbfe_search algo_status;
133 };
134
135 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
136
137 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
138 {
139 struct dvb_frontend_private *fepriv = fe->frontend_priv;
140 struct dvb_fe_events *events = &fepriv->events;
141 struct dvb_frontend_event *e;
142 int wp;
143
144 dprintk ("%s\n", __func__);
145
146 if (mutex_lock_interruptible (&events->mtx))
147 return;
148
149 wp = (events->eventw + 1) % MAX_EVENT;
150
151 if (wp == events->eventr) {
152 events->overflow = 1;
153 events->eventr = (events->eventr + 1) % MAX_EVENT;
154 }
155
156 e = &events->events[events->eventw];
157
158 memcpy (&e->parameters, &fepriv->parameters,
159 sizeof (struct dvb_frontend_parameters));
160
161 if (status & FE_HAS_LOCK)
162 if (fe->ops.get_frontend)
163 fe->ops.get_frontend(fe, &e->parameters);
164
165 events->eventw = wp;
166
167 mutex_unlock(&events->mtx);
168
169 e->status = status;
170
171 wake_up_interruptible (&events->wait_queue);
172 }
173
174 static int dvb_frontend_get_event(struct dvb_frontend *fe,
175 struct dvb_frontend_event *event, int flags)
176 {
177 struct dvb_frontend_private *fepriv = fe->frontend_priv;
178 struct dvb_fe_events *events = &fepriv->events;
179
180 dprintk ("%s\n", __func__);
181
182 if (events->overflow) {
183 events->overflow = 0;
184 return -EOVERFLOW;
185 }
186
187 if (events->eventw == events->eventr) {
188 int ret;
189
190 if (flags & O_NONBLOCK)
191 return -EWOULDBLOCK;
192
193 up(&fepriv->sem);
194
195 ret = wait_event_interruptible (events->wait_queue,
196 events->eventw != events->eventr);
197
198 if (down_interruptible (&fepriv->sem))
199 return -ERESTARTSYS;
200
201 if (ret < 0)
202 return ret;
203 }
204
205 if (mutex_lock_interruptible (&events->mtx))
206 return -ERESTARTSYS;
207
208 memcpy (event, &events->events[events->eventr],
209 sizeof(struct dvb_frontend_event));
210
211 events->eventr = (events->eventr + 1) % MAX_EVENT;
212
213 mutex_unlock(&events->mtx);
214
215 return 0;
216 }
217
218 static void dvb_frontend_init(struct dvb_frontend *fe)
219 {
220 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
221 fe->dvb->num,
222 fe->id,
223 fe->ops.info.name);
224
225 if (fe->ops.init)
226 fe->ops.init(fe);
227 if (fe->ops.tuner_ops.init) {
228 if (fe->ops.i2c_gate_ctrl)
229 fe->ops.i2c_gate_ctrl(fe, 1);
230 fe->ops.tuner_ops.init(fe);
231 if (fe->ops.i2c_gate_ctrl)
232 fe->ops.i2c_gate_ctrl(fe, 0);
233 }
234 }
235
236 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
237 {
238 struct dvb_frontend_private *fepriv = fe->frontend_priv;
239
240 fepriv->reinitialise = 1;
241 dvb_frontend_wakeup(fe);
242 }
243 EXPORT_SYMBOL(dvb_frontend_reinitialise);
244
245 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
246 {
247 int q2;
248
249 dprintk ("%s\n", __func__);
250
251 if (locked)
252 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
253 else
254 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
255
256 q2 = fepriv->quality - 128;
257 q2 *= q2;
258
259 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
260 }
261
262 /**
263 * Performs automatic twiddling of frontend parameters.
264 *
265 * @param fe The frontend concerned.
266 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
267 * @returns Number of complete iterations that have been performed.
268 */
269 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
270 {
271 int autoinversion;
272 int ready = 0;
273 int fe_set_err = 0;
274 struct dvb_frontend_private *fepriv = fe->frontend_priv;
275 int original_inversion = fepriv->parameters.inversion;
276 u32 original_frequency = fepriv->parameters.frequency;
277
278 /* are we using autoinversion? */
279 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
280 (fepriv->parameters.inversion == INVERSION_AUTO));
281
282 /* setup parameters correctly */
283 while(!ready) {
284 /* calculate the lnb_drift */
285 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
286
287 /* wrap the auto_step if we've exceeded the maximum drift */
288 if (fepriv->lnb_drift > fepriv->max_drift) {
289 fepriv->auto_step = 0;
290 fepriv->auto_sub_step = 0;
291 fepriv->lnb_drift = 0;
292 }
293
294 /* perform inversion and +/- zigzag */
295 switch(fepriv->auto_sub_step) {
296 case 0:
297 /* try with the current inversion and current drift setting */
298 ready = 1;
299 break;
300
301 case 1:
302 if (!autoinversion) break;
303
304 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
305 ready = 1;
306 break;
307
308 case 2:
309 if (fepriv->lnb_drift == 0) break;
310
311 fepriv->lnb_drift = -fepriv->lnb_drift;
312 ready = 1;
313 break;
314
315 case 3:
316 if (fepriv->lnb_drift == 0) break;
317 if (!autoinversion) break;
318
319 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
320 fepriv->lnb_drift = -fepriv->lnb_drift;
321 ready = 1;
322 break;
323
324 default:
325 fepriv->auto_step++;
326 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
327 break;
328 }
329
330 if (!ready) fepriv->auto_sub_step++;
331 }
332
333 /* if this attempt would hit where we started, indicate a complete
334 * iteration has occurred */
335 if ((fepriv->auto_step == fepriv->started_auto_step) &&
336 (fepriv->auto_sub_step == 0) && check_wrapped) {
337 return 1;
338 }
339
340 dprintk("%s: drift:%i inversion:%i auto_step:%i "
341 "auto_sub_step:%i started_auto_step:%i\n",
342 __func__, fepriv->lnb_drift, fepriv->inversion,
343 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
344
345 /* set the frontend itself */
346 fepriv->parameters.frequency += fepriv->lnb_drift;
347 if (autoinversion)
348 fepriv->parameters.inversion = fepriv->inversion;
349 if (fe->ops.set_frontend)
350 fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters);
351 if (fe_set_err < 0) {
352 fepriv->state = FESTATE_ERROR;
353 return fe_set_err;
354 }
355
356 fepriv->parameters.frequency = original_frequency;
357 fepriv->parameters.inversion = original_inversion;
358
359 fepriv->auto_sub_step++;
360 return 0;
361 }
362
363 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
364 {
365 fe_status_t s = 0;
366 int retval = 0;
367 struct dvb_frontend_private *fepriv = fe->frontend_priv;
368
369 /* if we've got no parameters, just keep idling */
370 if (fepriv->state & FESTATE_IDLE) {
371 fepriv->delay = 3*HZ;
372 fepriv->quality = 0;
373 return;
374 }
375
376 /* in SCAN mode, we just set the frontend when asked and leave it alone */
377 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
378 if (fepriv->state & FESTATE_RETUNE) {
379 if (fe->ops.set_frontend)
380 retval = fe->ops.set_frontend(fe,
381 &fepriv->parameters);
382 if (retval < 0)
383 fepriv->state = FESTATE_ERROR;
384 else
385 fepriv->state = FESTATE_TUNED;
386 }
387 fepriv->delay = 3*HZ;
388 fepriv->quality = 0;
389 return;
390 }
391
392 /* get the frontend status */
393 if (fepriv->state & FESTATE_RETUNE) {
394 s = 0;
395 } else {
396 if (fe->ops.read_status)
397 fe->ops.read_status(fe, &s);
398 if (s != fepriv->status) {
399 dvb_frontend_add_event(fe, s);
400 fepriv->status = s;
401 }
402 }
403
404 /* if we're not tuned, and we have a lock, move to the TUNED state */
405 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
406 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
407 fepriv->state = FESTATE_TUNED;
408
409 /* if we're tuned, then we have determined the correct inversion */
410 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
411 (fepriv->parameters.inversion == INVERSION_AUTO)) {
412 fepriv->parameters.inversion = fepriv->inversion;
413 }
414 return;
415 }
416
417 /* if we are tuned already, check we're still locked */
418 if (fepriv->state & FESTATE_TUNED) {
419 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
420
421 /* we're tuned, and the lock is still good... */
422 if (s & FE_HAS_LOCK) {
423 return;
424 } else { /* if we _WERE_ tuned, but now don't have a lock */
425 fepriv->state = FESTATE_ZIGZAG_FAST;
426 fepriv->started_auto_step = fepriv->auto_step;
427 fepriv->check_wrapped = 0;
428 }
429 }
430
431 /* don't actually do anything if we're in the LOSTLOCK state,
432 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
433 if ((fepriv->state & FESTATE_LOSTLOCK) &&
434 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
435 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
436 return;
437 }
438
439 /* don't do anything if we're in the DISEQC state, since this
440 * might be someone with a motorized dish controlled by DISEQC.
441 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
442 if (fepriv->state & FESTATE_DISEQC) {
443 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
444 return;
445 }
446
447 /* if we're in the RETUNE state, set everything up for a brand
448 * new scan, keeping the current inversion setting, as the next
449 * tune is _very_ likely to require the same */
450 if (fepriv->state & FESTATE_RETUNE) {
451 fepriv->lnb_drift = 0;
452 fepriv->auto_step = 0;
453 fepriv->auto_sub_step = 0;
454 fepriv->started_auto_step = 0;
455 fepriv->check_wrapped = 0;
456 }
457
458 /* fast zigzag. */
459 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
460 fepriv->delay = fepriv->min_delay;
461
462 /* peform a tune */
463 retval = dvb_frontend_swzigzag_autotune(fe,
464 fepriv->check_wrapped);
465 if (retval < 0) {
466 return;
467 } else if (retval) {
468 /* OK, if we've run out of trials at the fast speed.
469 * Drop back to slow for the _next_ attempt */
470 fepriv->state = FESTATE_SEARCHING_SLOW;
471 fepriv->started_auto_step = fepriv->auto_step;
472 return;
473 }
474 fepriv->check_wrapped = 1;
475
476 /* if we've just retuned, enter the ZIGZAG_FAST state.
477 * This ensures we cannot return from an
478 * FE_SET_FRONTEND ioctl before the first frontend tune
479 * occurs */
480 if (fepriv->state & FESTATE_RETUNE) {
481 fepriv->state = FESTATE_TUNING_FAST;
482 }
483 }
484
485 /* slow zigzag */
486 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
487 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
488
489 /* Note: don't bother checking for wrapping; we stay in this
490 * state until we get a lock */
491 dvb_frontend_swzigzag_autotune(fe, 0);
492 }
493 }
494
495 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
496 {
497 struct dvb_frontend_private *fepriv = fe->frontend_priv;
498
499 if (fepriv->exit)
500 return 1;
501
502 if (fepriv->dvbdev->writers == 1)
503 if (time_after(jiffies, fepriv->release_jiffies +
504 dvb_shutdown_timeout * HZ))
505 return 1;
506
507 return 0;
508 }
509
510 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
511 {
512 struct dvb_frontend_private *fepriv = fe->frontend_priv;
513
514 if (fepriv->wakeup) {
515 fepriv->wakeup = 0;
516 return 1;
517 }
518 return dvb_frontend_is_exiting(fe);
519 }
520
521 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
522 {
523 struct dvb_frontend_private *fepriv = fe->frontend_priv;
524
525 fepriv->wakeup = 1;
526 wake_up_interruptible(&fepriv->wait_queue);
527 }
528
529 static int dvb_frontend_thread(void *data)
530 {
531 struct dvb_frontend *fe = data;
532 struct dvb_frontend_private *fepriv = fe->frontend_priv;
533 unsigned long timeout;
534 fe_status_t s;
535 enum dvbfe_algo algo;
536
537 struct dvb_frontend_parameters *params;
538
539 dprintk("%s\n", __func__);
540
541 fepriv->check_wrapped = 0;
542 fepriv->quality = 0;
543 fepriv->delay = 3*HZ;
544 fepriv->status = 0;
545 fepriv->wakeup = 0;
546 fepriv->reinitialise = 0;
547
548 dvb_frontend_init(fe);
549
550 set_freezable();
551 while (1) {
552 up(&fepriv->sem); /* is locked when we enter the thread... */
553 restart:
554 timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
555 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
556 || freezing(current),
557 fepriv->delay);
558
559 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
560 /* got signal or quitting */
561 fepriv->exit = 1;
562 break;
563 }
564
565 if (try_to_freeze())
566 goto restart;
567
568 if (down_interruptible(&fepriv->sem))
569 break;
570
571 if (fepriv->reinitialise) {
572 dvb_frontend_init(fe);
573 if (fepriv->tone != -1) {
574 fe->ops.set_tone(fe, fepriv->tone);
575 }
576 if (fepriv->voltage != -1) {
577 fe->ops.set_voltage(fe, fepriv->voltage);
578 }
579 fepriv->reinitialise = 0;
580 }
581
582 /* do an iteration of the tuning loop */
583 if (fe->ops.get_frontend_algo) {
584 algo = fe->ops.get_frontend_algo(fe);
585 switch (algo) {
586 case DVBFE_ALGO_HW:
587 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
588 params = NULL; /* have we been asked to RETUNE ? */
589
590 if (fepriv->state & FESTATE_RETUNE) {
591 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
592 params = &fepriv->parameters;
593 fepriv->state = FESTATE_TUNED;
594 }
595
596 if (fe->ops.tune)
597 fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
598
599 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
600 dprintk("%s: state changed, adding current state\n", __func__);
601 dvb_frontend_add_event(fe, s);
602 fepriv->status = s;
603 }
604 break;
605 case DVBFE_ALGO_SW:
606 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
607 dvb_frontend_swzigzag(fe);
608 break;
609 case DVBFE_ALGO_CUSTOM:
610 params = NULL; /* have we been asked to RETUNE ? */
611 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
612 if (fepriv->state & FESTATE_RETUNE) {
613 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
614 params = &fepriv->parameters;
615 fepriv->state = FESTATE_TUNED;
616 }
617 /* Case where we are going to search for a carrier
618 * User asked us to retune again for some reason, possibly
619 * requesting a search with a new set of parameters
620 */
621 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
622 if (fe->ops.search) {
623 fepriv->algo_status = fe->ops.search(fe, &fepriv->parameters);
624 /* We did do a search as was requested, the flags are
625 * now unset as well and has the flags wrt to search.
626 */
627 } else {
628 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
629 }
630 }
631 /* Track the carrier if the search was successful */
632 if (fepriv->algo_status == DVBFE_ALGO_SEARCH_SUCCESS) {
633 if (fe->ops.track)
634 fe->ops.track(fe, &fepriv->parameters);
635 } else {
636 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
637 fepriv->delay = HZ / 2;
638 }
639 fe->ops.read_status(fe, &s);
640 if (s != fepriv->status) {
641 dvb_frontend_add_event(fe, s); /* update event list */
642 fepriv->status = s;
643 if (!(s & FE_HAS_LOCK)) {
644 fepriv->delay = HZ / 10;
645 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
646 } else {
647 fepriv->delay = 60 * HZ;
648 }
649 }
650 break;
651 default:
652 dprintk("%s: UNDEFINED ALGO !\n", __func__);
653 break;
654 }
655 } else {
656 dvb_frontend_swzigzag(fe);
657 }
658 }
659
660 if (dvb_powerdown_on_sleep) {
661 if (fe->ops.set_voltage)
662 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
663 if (fe->ops.tuner_ops.sleep) {
664 if (fe->ops.i2c_gate_ctrl)
665 fe->ops.i2c_gate_ctrl(fe, 1);
666 fe->ops.tuner_ops.sleep(fe);
667 if (fe->ops.i2c_gate_ctrl)
668 fe->ops.i2c_gate_ctrl(fe, 0);
669 }
670 if (fe->ops.sleep)
671 fe->ops.sleep(fe);
672 }
673
674 fepriv->thread = NULL;
675 fepriv->exit = 0;
676 mb();
677
678 dvb_frontend_wakeup(fe);
679 return 0;
680 }
681
682 static void dvb_frontend_stop(struct dvb_frontend *fe)
683 {
684 struct dvb_frontend_private *fepriv = fe->frontend_priv;
685
686 dprintk ("%s\n", __func__);
687
688 fepriv->exit = 1;
689 mb();
690
691 if (!fepriv->thread)
692 return;
693
694 kthread_stop(fepriv->thread);
695
696 init_MUTEX (&fepriv->sem);
697 fepriv->state = FESTATE_IDLE;
698
699 /* paranoia check in case a signal arrived */
700 if (fepriv->thread)
701 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
702 fepriv->thread);
703 }
704
705 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
706 {
707 return ((curtime.tv_usec < lasttime.tv_usec) ?
708 1000000 - lasttime.tv_usec + curtime.tv_usec :
709 curtime.tv_usec - lasttime.tv_usec);
710 }
711 EXPORT_SYMBOL(timeval_usec_diff);
712
713 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
714 {
715 curtime->tv_usec += add_usec;
716 if (curtime->tv_usec >= 1000000) {
717 curtime->tv_usec -= 1000000;
718 curtime->tv_sec++;
719 }
720 }
721
722 /*
723 * Sleep until gettimeofday() > waketime + add_usec
724 * This needs to be as precise as possible, but as the delay is
725 * usually between 2ms and 32ms, it is done using a scheduled msleep
726 * followed by usleep (normally a busy-wait loop) for the remainder
727 */
728 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
729 {
730 struct timeval lasttime;
731 s32 delta, newdelta;
732
733 timeval_usec_add(waketime, add_usec);
734
735 do_gettimeofday(&lasttime);
736 delta = timeval_usec_diff(lasttime, *waketime);
737 if (delta > 2500) {
738 msleep((delta - 1500) / 1000);
739 do_gettimeofday(&lasttime);
740 newdelta = timeval_usec_diff(lasttime, *waketime);
741 delta = (newdelta > delta) ? 0 : newdelta;
742 }
743 if (delta > 0)
744 udelay(delta);
745 }
746 EXPORT_SYMBOL(dvb_frontend_sleep_until);
747
748 static int dvb_frontend_start(struct dvb_frontend *fe)
749 {
750 int ret;
751 struct dvb_frontend_private *fepriv = fe->frontend_priv;
752 struct task_struct *fe_thread;
753
754 dprintk ("%s\n", __func__);
755
756 if (fepriv->thread) {
757 if (!fepriv->exit)
758 return 0;
759 else
760 dvb_frontend_stop (fe);
761 }
762
763 if (signal_pending(current))
764 return -EINTR;
765 if (down_interruptible (&fepriv->sem))
766 return -EINTR;
767
768 fepriv->state = FESTATE_IDLE;
769 fepriv->exit = 0;
770 fepriv->thread = NULL;
771 mb();
772
773 fe_thread = kthread_run(dvb_frontend_thread, fe,
774 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
775 if (IS_ERR(fe_thread)) {
776 ret = PTR_ERR(fe_thread);
777 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
778 up(&fepriv->sem);
779 return ret;
780 }
781 fepriv->thread = fe_thread;
782 return 0;
783 }
784
785 static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
786 u32 *freq_min, u32 *freq_max)
787 {
788 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
789
790 if (fe->ops.info.frequency_max == 0)
791 *freq_max = fe->ops.tuner_ops.info.frequency_max;
792 else if (fe->ops.tuner_ops.info.frequency_max == 0)
793 *freq_max = fe->ops.info.frequency_max;
794 else
795 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
796
797 if (*freq_min == 0 || *freq_max == 0)
798 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
799 fe->dvb->num,fe->id);
800 }
801
802 static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
803 struct dvb_frontend_parameters *parms)
804 {
805 u32 freq_min;
806 u32 freq_max;
807
808 /* range check: frequency */
809 dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
810 if ((freq_min && parms->frequency < freq_min) ||
811 (freq_max && parms->frequency > freq_max)) {
812 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
813 fe->dvb->num, fe->id, parms->frequency, freq_min, freq_max);
814 return -EINVAL;
815 }
816
817 /* range check: symbol rate */
818 if (fe->ops.info.type == FE_QPSK) {
819 if ((fe->ops.info.symbol_rate_min &&
820 parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
821 (fe->ops.info.symbol_rate_max &&
822 parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
823 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
824 fe->dvb->num, fe->id, parms->u.qpsk.symbol_rate,
825 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
826 return -EINVAL;
827 }
828
829 } else if (fe->ops.info.type == FE_QAM) {
830 if ((fe->ops.info.symbol_rate_min &&
831 parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
832 (fe->ops.info.symbol_rate_max &&
833 parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
834 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
835 fe->dvb->num, fe->id, parms->u.qam.symbol_rate,
836 fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
837 return -EINVAL;
838 }
839 }
840
841 /* check for supported modulation */
842 if (fe->ops.info.type == FE_QAM &&
843 (parms->u.qam.modulation > QAM_AUTO ||
844 !((1 << (parms->u.qam.modulation + 10)) & fe->ops.info.caps))) {
845 printk(KERN_WARNING "DVB: adapter %i frontend %i modulation %u not supported\n",
846 fe->dvb->num, fe->id, parms->u.qam.modulation);
847 return -EINVAL;
848 }
849
850 return 0;
851 }
852
853 static struct dtv_cmds_h dtv_cmds[] = {
854 [DTV_TUNE] = {
855 .name = "DTV_TUNE",
856 .cmd = DTV_TUNE,
857 .set = 1,
858 },
859 [DTV_CLEAR] = {
860 .name = "DTV_CLEAR",
861 .cmd = DTV_CLEAR,
862 .set = 1,
863 },
864
865 /* Set */
866 [DTV_FREQUENCY] = {
867 .name = "DTV_FREQUENCY",
868 .cmd = DTV_FREQUENCY,
869 .set = 1,
870 },
871 [DTV_BANDWIDTH_HZ] = {
872 .name = "DTV_BANDWIDTH_HZ",
873 .cmd = DTV_BANDWIDTH_HZ,
874 .set = 1,
875 },
876 [DTV_MODULATION] = {
877 .name = "DTV_MODULATION",
878 .cmd = DTV_MODULATION,
879 .set = 1,
880 },
881 [DTV_INVERSION] = {
882 .name = "DTV_INVERSION",
883 .cmd = DTV_INVERSION,
884 .set = 1,
885 },
886 [DTV_DISEQC_MASTER] = {
887 .name = "DTV_DISEQC_MASTER",
888 .cmd = DTV_DISEQC_MASTER,
889 .set = 1,
890 .buffer = 1,
891 },
892 [DTV_SYMBOL_RATE] = {
893 .name = "DTV_SYMBOL_RATE",
894 .cmd = DTV_SYMBOL_RATE,
895 .set = 1,
896 },
897 [DTV_INNER_FEC] = {
898 .name = "DTV_INNER_FEC",
899 .cmd = DTV_INNER_FEC,
900 .set = 1,
901 },
902 [DTV_VOLTAGE] = {
903 .name = "DTV_VOLTAGE",
904 .cmd = DTV_VOLTAGE,
905 .set = 1,
906 },
907 [DTV_TONE] = {
908 .name = "DTV_TONE",
909 .cmd = DTV_TONE,
910 .set = 1,
911 },
912 [DTV_PILOT] = {
913 .name = "DTV_PILOT",
914 .cmd = DTV_PILOT,
915 .set = 1,
916 },
917 [DTV_ROLLOFF] = {
918 .name = "DTV_ROLLOFF",
919 .cmd = DTV_ROLLOFF,
920 .set = 1,
921 },
922 [DTV_DELIVERY_SYSTEM] = {
923 .name = "DTV_DELIVERY_SYSTEM",
924 .cmd = DTV_DELIVERY_SYSTEM,
925 .set = 1,
926 },
927 [DTV_HIERARCHY] = {
928 .name = "DTV_HIERARCHY",
929 .cmd = DTV_HIERARCHY,
930 .set = 1,
931 },
932 [DTV_CODE_RATE_HP] = {
933 .name = "DTV_CODE_RATE_HP",
934 .cmd = DTV_CODE_RATE_HP,
935 .set = 1,
936 },
937 [DTV_CODE_RATE_LP] = {
938 .name = "DTV_CODE_RATE_LP",
939 .cmd = DTV_CODE_RATE_LP,
940 .set = 1,
941 },
942 [DTV_GUARD_INTERVAL] = {
943 .name = "DTV_GUARD_INTERVAL",
944 .cmd = DTV_GUARD_INTERVAL,
945 .set = 1,
946 },
947 [DTV_TRANSMISSION_MODE] = {
948 .name = "DTV_TRANSMISSION_MODE",
949 .cmd = DTV_TRANSMISSION_MODE,
950 .set = 1,
951 },
952 /* Get */
953 [DTV_DISEQC_SLAVE_REPLY] = {
954 .name = "DTV_DISEQC_SLAVE_REPLY",
955 .cmd = DTV_DISEQC_SLAVE_REPLY,
956 .set = 0,
957 .buffer = 1,
958 },
959 [DTV_API_VERSION] = {
960 .name = "DTV_API_VERSION",
961 .cmd = DTV_API_VERSION,
962 .set = 0,
963 },
964 [DTV_CODE_RATE_HP] = {
965 .name = "DTV_CODE_RATE_HP",
966 .cmd = DTV_CODE_RATE_HP,
967 .set = 0,
968 },
969 [DTV_CODE_RATE_LP] = {
970 .name = "DTV_CODE_RATE_LP",
971 .cmd = DTV_CODE_RATE_LP,
972 .set = 0,
973 },
974 [DTV_GUARD_INTERVAL] = {
975 .name = "DTV_GUARD_INTERVAL",
976 .cmd = DTV_GUARD_INTERVAL,
977 .set = 0,
978 },
979 [DTV_TRANSMISSION_MODE] = {
980 .name = "DTV_TRANSMISSION_MODE",
981 .cmd = DTV_TRANSMISSION_MODE,
982 .set = 0,
983 },
984 [DTV_HIERARCHY] = {
985 .name = "DTV_HIERARCHY",
986 .cmd = DTV_HIERARCHY,
987 .set = 0,
988 },
989 };
990
991 static void dtv_property_dump(struct dtv_property *tvp)
992 {
993 int i;
994
995 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
996 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
997 __func__, tvp->cmd);
998 return;
999 }
1000
1001 dprintk("%s() tvp.cmd = 0x%08x (%s)\n"
1002 ,__func__
1003 ,tvp->cmd
1004 ,dtv_cmds[ tvp->cmd ].name);
1005
1006 if(dtv_cmds[ tvp->cmd ].buffer) {
1007
1008 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1009 ,__func__
1010 ,tvp->u.buffer.len);
1011
1012 for(i = 0; i < tvp->u.buffer.len; i++)
1013 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1014 ,__func__
1015 ,i
1016 ,tvp->u.buffer.data[i]);
1017
1018 } else
1019 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1020 }
1021
1022 static int is_legacy_delivery_system(fe_delivery_system_t s)
1023 {
1024 if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
1025 (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) ||
1026 (s == SYS_ATSC))
1027 return 1;
1028
1029 return 0;
1030 }
1031
1032 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1033 * drivers can use a single set_frontend tuning function, regardless of whether
1034 * it's being used for the legacy or new API, reducing code and complexity.
1035 */
1036 static void dtv_property_cache_sync(struct dvb_frontend *fe,
1037 struct dvb_frontend_parameters *p)
1038 {
1039 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1040
1041 c->frequency = p->frequency;
1042 c->inversion = p->inversion;
1043
1044 switch (fe->ops.info.type) {
1045 case FE_QPSK:
1046 c->modulation = QPSK; /* implied for DVB-S in legacy API */
1047 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
1048 c->symbol_rate = p->u.qpsk.symbol_rate;
1049 c->fec_inner = p->u.qpsk.fec_inner;
1050 c->delivery_system = SYS_DVBS;
1051 break;
1052 case FE_QAM:
1053 c->symbol_rate = p->u.qam.symbol_rate;
1054 c->fec_inner = p->u.qam.fec_inner;
1055 c->modulation = p->u.qam.modulation;
1056 c->delivery_system = SYS_DVBC_ANNEX_AC;
1057 break;
1058 case FE_OFDM:
1059 if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ)
1060 c->bandwidth_hz = 6000000;
1061 else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ)
1062 c->bandwidth_hz = 7000000;
1063 else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ)
1064 c->bandwidth_hz = 8000000;
1065 else
1066 /* Including BANDWIDTH_AUTO */
1067 c->bandwidth_hz = 0;
1068 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1069 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1070 c->modulation = p->u.ofdm.constellation;
1071 c->transmission_mode = p->u.ofdm.transmission_mode;
1072 c->guard_interval = p->u.ofdm.guard_interval;
1073 c->hierarchy = p->u.ofdm.hierarchy_information;
1074 c->delivery_system = SYS_DVBT;
1075 break;
1076 case FE_ATSC:
1077 c->modulation = p->u.vsb.modulation;
1078 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1079 c->delivery_system = SYS_ATSC;
1080 else
1081 c->delivery_system = SYS_DVBC_ANNEX_B;
1082 break;
1083 }
1084 }
1085
1086 /* Ensure the cached values are set correctly in the frontend
1087 * legacy tuning structures, for the advanced tuning API.
1088 */
1089 static void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
1090 {
1091 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1092 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1093 struct dvb_frontend_parameters *p = &fepriv->parameters;
1094
1095 p->frequency = c->frequency;
1096 p->inversion = c->inversion;
1097
1098 switch (fe->ops.info.type) {
1099 case FE_QPSK:
1100 dprintk("%s() Preparing QPSK req\n", __func__);
1101 p->u.qpsk.symbol_rate = c->symbol_rate;
1102 p->u.qpsk.fec_inner = c->fec_inner;
1103 c->delivery_system = SYS_DVBS;
1104 break;
1105 case FE_QAM:
1106 dprintk("%s() Preparing QAM req\n", __func__);
1107 p->u.qam.symbol_rate = c->symbol_rate;
1108 p->u.qam.fec_inner = c->fec_inner;
1109 p->u.qam.modulation = c->modulation;
1110 c->delivery_system = SYS_DVBC_ANNEX_AC;
1111 break;
1112 case FE_OFDM:
1113 dprintk("%s() Preparing OFDM req\n", __func__);
1114 if (c->bandwidth_hz == 6000000)
1115 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1116 else if (c->bandwidth_hz == 7000000)
1117 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1118 else if (c->bandwidth_hz == 8000000)
1119 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1120 else
1121 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1122 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1123 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1124 p->u.ofdm.constellation = c->modulation;
1125 p->u.ofdm.transmission_mode = c->transmission_mode;
1126 p->u.ofdm.guard_interval = c->guard_interval;
1127 p->u.ofdm.hierarchy_information = c->hierarchy;
1128 c->delivery_system = SYS_DVBT;
1129 break;
1130 case FE_ATSC:
1131 dprintk("%s() Preparing VSB req\n", __func__);
1132 p->u.vsb.modulation = c->modulation;
1133 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1134 c->delivery_system = SYS_ATSC;
1135 else
1136 c->delivery_system = SYS_DVBC_ANNEX_B;
1137 break;
1138 }
1139 }
1140
1141 /* Ensure the cached values are set correctly in the frontend
1142 * legacy tuning structures, for the legacy tuning API.
1143 */
1144 static void dtv_property_adv_params_sync(struct dvb_frontend *fe)
1145 {
1146 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1147 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1148 struct dvb_frontend_parameters *p = &fepriv->parameters;
1149
1150 p->frequency = c->frequency;
1151 p->inversion = c->inversion;
1152
1153 switch(c->modulation) {
1154 case PSK_8:
1155 case APSK_16:
1156 case APSK_32:
1157 case QPSK:
1158 p->u.qpsk.symbol_rate = c->symbol_rate;
1159 p->u.qpsk.fec_inner = c->fec_inner;
1160 break;
1161 default:
1162 break;
1163 }
1164
1165 if(c->delivery_system == SYS_ISDBT) {
1166 /* Fake out a generic DVB-T request so we pass validation in the ioctl */
1167 p->frequency = c->frequency;
1168 p->inversion = INVERSION_AUTO;
1169 p->u.ofdm.constellation = QAM_AUTO;
1170 p->u.ofdm.code_rate_HP = FEC_AUTO;
1171 p->u.ofdm.code_rate_LP = FEC_AUTO;
1172 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1173 p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
1174 p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
1175 p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
1176 }
1177 }
1178
1179 static void dtv_property_cache_submit(struct dvb_frontend *fe)
1180 {
1181 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1182
1183 /* For legacy delivery systems we don't need the delivery_system to
1184 * be specified, but we populate the older structures from the cache
1185 * so we can call set_frontend on older drivers.
1186 */
1187 if(is_legacy_delivery_system(c->delivery_system)) {
1188
1189 dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation);
1190 dtv_property_legacy_params_sync(fe);
1191
1192 } else {
1193 dprintk("%s() adv, modulation = %d\n", __func__, c->modulation);
1194
1195 /* For advanced delivery systems / modulation types ...
1196 * we seed the lecacy dvb_frontend_parameters structure
1197 * so that the sanity checking code later in the IOCTL processing
1198 * can validate our basic frequency ranges, symbolrates, modulation
1199 * etc.
1200 */
1201 dtv_property_adv_params_sync(fe);
1202 }
1203 }
1204
1205 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1206 unsigned int cmd, void *parg);
1207 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1208 unsigned int cmd, void *parg);
1209
1210 static int dtv_property_process_get(struct dvb_frontend *fe,
1211 struct dtv_property *tvp,
1212 struct inode *inode, struct file *file)
1213 {
1214 int r = 0;
1215
1216 dtv_property_dump(tvp);
1217
1218 /* Allow the frontend to validate incoming properties */
1219 if (fe->ops.get_property)
1220 r = fe->ops.get_property(fe, tvp);
1221
1222 if (r < 0)
1223 return r;
1224
1225 switch(tvp->cmd) {
1226 case DTV_FREQUENCY:
1227 tvp->u.data = fe->dtv_property_cache.frequency;
1228 break;
1229 case DTV_MODULATION:
1230 tvp->u.data = fe->dtv_property_cache.modulation;
1231 break;
1232 case DTV_BANDWIDTH_HZ:
1233 tvp->u.data = fe->dtv_property_cache.bandwidth_hz;
1234 break;
1235 case DTV_INVERSION:
1236 tvp->u.data = fe->dtv_property_cache.inversion;
1237 break;
1238 case DTV_SYMBOL_RATE:
1239 tvp->u.data = fe->dtv_property_cache.symbol_rate;
1240 break;
1241 case DTV_INNER_FEC:
1242 tvp->u.data = fe->dtv_property_cache.fec_inner;
1243 break;
1244 case DTV_PILOT:
1245 tvp->u.data = fe->dtv_property_cache.pilot;
1246 break;
1247 case DTV_ROLLOFF:
1248 tvp->u.data = fe->dtv_property_cache.rolloff;
1249 break;
1250 case DTV_DELIVERY_SYSTEM:
1251 tvp->u.data = fe->dtv_property_cache.delivery_system;
1252 break;
1253 case DTV_VOLTAGE:
1254 tvp->u.data = fe->dtv_property_cache.voltage;
1255 break;
1256 case DTV_TONE:
1257 tvp->u.data = fe->dtv_property_cache.sectone;
1258 break;
1259 case DTV_API_VERSION:
1260 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1261 break;
1262 case DTV_CODE_RATE_HP:
1263 tvp->u.data = fe->dtv_property_cache.code_rate_HP;
1264 break;
1265 case DTV_CODE_RATE_LP:
1266 tvp->u.data = fe->dtv_property_cache.code_rate_LP;
1267 break;
1268 case DTV_GUARD_INTERVAL:
1269 tvp->u.data = fe->dtv_property_cache.guard_interval;
1270 break;
1271 case DTV_TRANSMISSION_MODE:
1272 tvp->u.data = fe->dtv_property_cache.transmission_mode;
1273 break;
1274 case DTV_HIERARCHY:
1275 tvp->u.data = fe->dtv_property_cache.hierarchy;
1276 break;
1277 default:
1278 r = -1;
1279 }
1280
1281 return r;
1282 }
1283
1284 static int dtv_property_process_set(struct dvb_frontend *fe,
1285 struct dtv_property *tvp,
1286 struct inode *inode,
1287 struct file *file)
1288 {
1289 int r = 0;
1290 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1291 dtv_property_dump(tvp);
1292
1293 /* Allow the frontend to validate incoming properties */
1294 if (fe->ops.set_property)
1295 r = fe->ops.set_property(fe, tvp);
1296
1297 if (r < 0)
1298 return r;
1299
1300 switch(tvp->cmd) {
1301 case DTV_CLEAR:
1302 /* Reset a cache of data specific to the frontend here. This does
1303 * not effect hardware.
1304 */
1305 dprintk("%s() Flushing property cache\n", __func__);
1306 memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
1307 fe->dtv_property_cache.state = tvp->cmd;
1308 fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
1309 break;
1310 case DTV_TUNE:
1311 /* interpret the cache of data, build either a traditional frontend
1312 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1313 * ioctl.
1314 */
1315 fe->dtv_property_cache.state = tvp->cmd;
1316 dprintk("%s() Finalised property cache\n", __func__);
1317 dtv_property_cache_submit(fe);
1318
1319 r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
1320 &fepriv->parameters);
1321 break;
1322 case DTV_FREQUENCY:
1323 fe->dtv_property_cache.frequency = tvp->u.data;
1324 break;
1325 case DTV_MODULATION:
1326 fe->dtv_property_cache.modulation = tvp->u.data;
1327 break;
1328 case DTV_BANDWIDTH_HZ:
1329 fe->dtv_property_cache.bandwidth_hz = tvp->u.data;
1330 break;
1331 case DTV_INVERSION:
1332 fe->dtv_property_cache.inversion = tvp->u.data;
1333 break;
1334 case DTV_SYMBOL_RATE:
1335 fe->dtv_property_cache.symbol_rate = tvp->u.data;
1336 break;
1337 case DTV_INNER_FEC:
1338 fe->dtv_property_cache.fec_inner = tvp->u.data;
1339 break;
1340 case DTV_PILOT:
1341 fe->dtv_property_cache.pilot = tvp->u.data;
1342 break;
1343 case DTV_ROLLOFF:
1344 fe->dtv_property_cache.rolloff = tvp->u.data;
1345 break;
1346 case DTV_DELIVERY_SYSTEM:
1347 fe->dtv_property_cache.delivery_system = tvp->u.data;
1348 break;
1349 case DTV_VOLTAGE:
1350 fe->dtv_property_cache.voltage = tvp->u.data;
1351 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
1352 (void *)fe->dtv_property_cache.voltage);
1353 break;
1354 case DTV_TONE:
1355 fe->dtv_property_cache.sectone = tvp->u.data;
1356 r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
1357 (void *)fe->dtv_property_cache.sectone);
1358 break;
1359 case DTV_CODE_RATE_HP:
1360 fe->dtv_property_cache.code_rate_HP = tvp->u.data;
1361 break;
1362 case DTV_CODE_RATE_LP:
1363 fe->dtv_property_cache.code_rate_LP = tvp->u.data;
1364 break;
1365 case DTV_GUARD_INTERVAL:
1366 fe->dtv_property_cache.guard_interval = tvp->u.data;
1367 break;
1368 case DTV_TRANSMISSION_MODE:
1369 fe->dtv_property_cache.transmission_mode = tvp->u.data;
1370 break;
1371 case DTV_HIERARCHY:
1372 fe->dtv_property_cache.hierarchy = tvp->u.data;
1373 break;
1374 default:
1375 r = -1;
1376 }
1377
1378 return r;
1379 }
1380
1381 static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
1382 unsigned int cmd, void *parg)
1383 {
1384 struct dvb_device *dvbdev = file->private_data;
1385 struct dvb_frontend *fe = dvbdev->priv;
1386 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1387 int err = -EOPNOTSUPP;
1388
1389 dprintk ("%s\n", __func__);
1390
1391 if (fepriv->exit)
1392 return -ENODEV;
1393
1394 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1395 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1396 cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1397 return -EPERM;
1398
1399 if (down_interruptible (&fepriv->sem))
1400 return -ERESTARTSYS;
1401
1402 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1403 err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
1404 else {
1405 fe->dtv_property_cache.state = DTV_UNDEFINED;
1406 err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
1407 }
1408
1409 up(&fepriv->sem);
1410 return err;
1411 }
1412
1413 static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
1414 unsigned int cmd, void *parg)
1415 {
1416 struct dvb_device *dvbdev = file->private_data;
1417 struct dvb_frontend *fe = dvbdev->priv;
1418 int err = 0;
1419
1420 struct dtv_properties *tvps = NULL;
1421 struct dtv_property *tvp = NULL;
1422 int i;
1423
1424 dprintk("%s\n", __func__);
1425
1426 if(cmd == FE_SET_PROPERTY) {
1427 tvps = (struct dtv_properties __user *)parg;
1428
1429 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1430 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1431
1432 /* Put an arbitrary limit on the number of messages that can
1433 * be sent at once */
1434 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1435 return -EINVAL;
1436
1437 tvp = (struct dtv_property *) kmalloc(tvps->num *
1438 sizeof(struct dtv_property), GFP_KERNEL);
1439 if (!tvp) {
1440 err = -ENOMEM;
1441 goto out;
1442 }
1443
1444 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1445 err = -EFAULT;
1446 goto out;
1447 }
1448
1449 for (i = 0; i < tvps->num; i++) {
1450 (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file);
1451 err |= (tvp + i)->result;
1452 }
1453
1454 if(fe->dtv_property_cache.state == DTV_TUNE)
1455 dprintk("%s() Property cache is full, tuning\n", __func__);
1456
1457 } else
1458 if(cmd == FE_GET_PROPERTY) {
1459
1460 tvps = (struct dtv_properties __user *)parg;
1461
1462 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1463 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1464
1465 /* Put an arbitrary limit on the number of messages that can
1466 * be sent at once */
1467 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1468 return -EINVAL;
1469
1470 tvp = (struct dtv_property *) kmalloc(tvps->num *
1471 sizeof(struct dtv_property), GFP_KERNEL);
1472 if (!tvp) {
1473 err = -ENOMEM;
1474 goto out;
1475 }
1476
1477 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1478 err = -EFAULT;
1479 goto out;
1480 }
1481
1482 for (i = 0; i < tvps->num; i++) {
1483 (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file);
1484 err |= (tvp + i)->result;
1485 }
1486
1487 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1488 err = -EFAULT;
1489 goto out;
1490 }
1491
1492 } else
1493 err = -EOPNOTSUPP;
1494
1495 out:
1496 kfree(tvp);
1497 return err;
1498 }
1499
1500 static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
1501 unsigned int cmd, void *parg)
1502 {
1503 struct dvb_device *dvbdev = file->private_data;
1504 struct dvb_frontend *fe = dvbdev->priv;
1505 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1506 int err = -EOPNOTSUPP;
1507
1508 switch (cmd) {
1509 case FE_GET_INFO: {
1510 struct dvb_frontend_info* info = parg;
1511 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1512 dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
1513
1514 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1515 * do it, it is done for it. */
1516 info->caps |= FE_CAN_INVERSION_AUTO;
1517 err = 0;
1518 break;
1519 }
1520
1521 case FE_READ_STATUS: {
1522 fe_status_t* status = parg;
1523
1524 /* if retune was requested but hasn't occured yet, prevent
1525 * that user get signal state from previous tuning */
1526 if (fepriv->state == FESTATE_RETUNE ||
1527 fepriv->state == FESTATE_ERROR) {
1528 err=0;
1529 *status = 0;
1530 break;
1531 }
1532
1533 if (fe->ops.read_status)
1534 err = fe->ops.read_status(fe, status);
1535 break;
1536 }
1537 case FE_READ_BER:
1538 if (fe->ops.read_ber)
1539 err = fe->ops.read_ber(fe, (__u32*) parg);
1540 break;
1541
1542 case FE_READ_SIGNAL_STRENGTH:
1543 if (fe->ops.read_signal_strength)
1544 err = fe->ops.read_signal_strength(fe, (__u16*) parg);
1545 break;
1546
1547 case FE_READ_SNR:
1548 if (fe->ops.read_snr)
1549 err = fe->ops.read_snr(fe, (__u16*) parg);
1550 break;
1551
1552 case FE_READ_UNCORRECTED_BLOCKS:
1553 if (fe->ops.read_ucblocks)
1554 err = fe->ops.read_ucblocks(fe, (__u32*) parg);
1555 break;
1556
1557
1558 case FE_DISEQC_RESET_OVERLOAD:
1559 if (fe->ops.diseqc_reset_overload) {
1560 err = fe->ops.diseqc_reset_overload(fe);
1561 fepriv->state = FESTATE_DISEQC;
1562 fepriv->status = 0;
1563 }
1564 break;
1565
1566 case FE_DISEQC_SEND_MASTER_CMD:
1567 if (fe->ops.diseqc_send_master_cmd) {
1568 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
1569 fepriv->state = FESTATE_DISEQC;
1570 fepriv->status = 0;
1571 }
1572 break;
1573
1574 case FE_DISEQC_SEND_BURST:
1575 if (fe->ops.diseqc_send_burst) {
1576 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
1577 fepriv->state = FESTATE_DISEQC;
1578 fepriv->status = 0;
1579 }
1580 break;
1581
1582 case FE_SET_TONE:
1583 if (fe->ops.set_tone) {
1584 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
1585 fepriv->tone = (fe_sec_tone_mode_t) parg;
1586 fepriv->state = FESTATE_DISEQC;
1587 fepriv->status = 0;
1588 }
1589 break;
1590
1591 case FE_SET_VOLTAGE:
1592 if (fe->ops.set_voltage) {
1593 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
1594 fepriv->voltage = (fe_sec_voltage_t) parg;
1595 fepriv->state = FESTATE_DISEQC;
1596 fepriv->status = 0;
1597 }
1598 break;
1599
1600 case FE_DISHNETWORK_SEND_LEGACY_CMD:
1601 if (fe->ops.dishnetwork_send_legacy_command) {
1602 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
1603 fepriv->state = FESTATE_DISEQC;
1604 fepriv->status = 0;
1605 } else if (fe->ops.set_voltage) {
1606 /*
1607 * NOTE: This is a fallback condition. Some frontends
1608 * (stv0299 for instance) take longer than 8msec to
1609 * respond to a set_voltage command. Those switches
1610 * need custom routines to switch properly. For all
1611 * other frontends, the following shoule work ok.
1612 * Dish network legacy switches (as used by Dish500)
1613 * are controlled by sending 9-bit command words
1614 * spaced 8msec apart.
1615 * the actual command word is switch/port dependant
1616 * so it is up to the userspace application to send
1617 * the right command.
1618 * The command must always start with a '0' after
1619 * initialization, so parg is 8 bits and does not
1620 * include the initialization or start bit
1621 */
1622 unsigned long swcmd = ((unsigned long) parg) << 1;
1623 struct timeval nexttime;
1624 struct timeval tv[10];
1625 int i;
1626 u8 last = 1;
1627 if (dvb_frontend_debug)
1628 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
1629 do_gettimeofday(&nexttime);
1630 if (dvb_frontend_debug)
1631 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
1632 /* before sending a command, initialize by sending
1633 * a 32ms 18V to the switch
1634 */
1635 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
1636 dvb_frontend_sleep_until(&nexttime, 32000);
1637
1638 for (i = 0; i < 9; i++) {
1639 if (dvb_frontend_debug)
1640 do_gettimeofday(&tv[i + 1]);
1641 if ((swcmd & 0x01) != last) {
1642 /* set voltage to (last ? 13V : 18V) */
1643 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
1644 last = (last) ? 0 : 1;
1645 }
1646 swcmd = swcmd >> 1;
1647 if (i != 8)
1648 dvb_frontend_sleep_until(&nexttime, 8000);
1649 }
1650 if (dvb_frontend_debug) {
1651 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
1652 __func__, fe->dvb->num);
1653 for (i = 1; i < 10; i++)
1654 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
1655 }
1656 err = 0;
1657 fepriv->state = FESTATE_DISEQC;
1658 fepriv->status = 0;
1659 }
1660 break;
1661
1662 case FE_DISEQC_RECV_SLAVE_REPLY:
1663 if (fe->ops.diseqc_recv_slave_reply)
1664 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
1665 break;
1666
1667 case FE_ENABLE_HIGH_LNB_VOLTAGE:
1668 if (fe->ops.enable_high_lnb_voltage)
1669 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
1670 break;
1671
1672 case FE_SET_FRONTEND: {
1673 struct dvb_frontend_tune_settings fetunesettings;
1674
1675 if(fe->dtv_property_cache.state == DTV_TUNE) {
1676 if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
1677 err = -EINVAL;
1678 break;
1679 }
1680 } else {
1681 if (dvb_frontend_check_parameters(fe, parg) < 0) {
1682 err = -EINVAL;
1683 break;
1684 }
1685
1686 memcpy (&fepriv->parameters, parg,
1687 sizeof (struct dvb_frontend_parameters));
1688 dtv_property_cache_sync(fe, &fepriv->parameters);
1689 }
1690
1691 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1692 memcpy(&fetunesettings.parameters, parg,
1693 sizeof (struct dvb_frontend_parameters));
1694
1695 /* force auto frequency inversion if requested */
1696 if (dvb_force_auto_inversion) {
1697 fepriv->parameters.inversion = INVERSION_AUTO;
1698 fetunesettings.parameters.inversion = INVERSION_AUTO;
1699 }
1700 if (fe->ops.info.type == FE_OFDM) {
1701 /* without hierarchical coding code_rate_LP is irrelevant,
1702 * so we tolerate the otherwise invalid FEC_NONE setting */
1703 if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
1704 fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
1705 fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
1706 }
1707
1708 /* get frontend-specific tuning settings */
1709 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1710 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1711 fepriv->max_drift = fetunesettings.max_drift;
1712 fepriv->step_size = fetunesettings.step_size;
1713 } else {
1714 /* default values */
1715 switch(fe->ops.info.type) {
1716 case FE_QPSK:
1717 fepriv->min_delay = HZ/20;
1718 fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
1719 fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
1720 break;
1721
1722 case FE_QAM:
1723 fepriv->min_delay = HZ/20;
1724 fepriv->step_size = 0; /* no zigzag */
1725 fepriv->max_drift = 0;
1726 break;
1727
1728 case FE_OFDM:
1729 fepriv->min_delay = HZ/20;
1730 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1731 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1732 break;
1733 case FE_ATSC:
1734 fepriv->min_delay = HZ/20;
1735 fepriv->step_size = 0;
1736 fepriv->max_drift = 0;
1737 break;
1738 }
1739 }
1740 if (dvb_override_tune_delay > 0)
1741 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1742
1743 fepriv->state = FESTATE_RETUNE;
1744
1745 /* Request the search algorithm to search */
1746 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1747
1748 dvb_frontend_wakeup(fe);
1749 dvb_frontend_add_event(fe, 0);
1750 fepriv->status = 0;
1751 err = 0;
1752 break;
1753 }
1754
1755 case FE_GET_EVENT:
1756 err = dvb_frontend_get_event (fe, parg, file->f_flags);
1757 break;
1758
1759 case FE_GET_FRONTEND:
1760 if (fe->ops.get_frontend) {
1761 memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
1762 err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
1763 }
1764 break;
1765
1766 case FE_SET_FRONTEND_TUNE_MODE:
1767 fepriv->tune_mode_flags = (unsigned long) parg;
1768 err = 0;
1769 break;
1770 };
1771
1772 return err;
1773 }
1774
1775
1776 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
1777 {
1778 struct dvb_device *dvbdev = file->private_data;
1779 struct dvb_frontend *fe = dvbdev->priv;
1780 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1781
1782 dprintk ("%s\n", __func__);
1783
1784 poll_wait (file, &fepriv->events.wait_queue, wait);
1785
1786 if (fepriv->events.eventw != fepriv->events.eventr)
1787 return (POLLIN | POLLRDNORM | POLLPRI);
1788
1789 return 0;
1790 }
1791
1792 static int dvb_frontend_open(struct inode *inode, struct file *file)
1793 {
1794 struct dvb_device *dvbdev = file->private_data;
1795 struct dvb_frontend *fe = dvbdev->priv;
1796 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1797 struct dvb_adapter *adapter = fe->dvb;
1798 int ret;
1799
1800 dprintk ("%s\n", __func__);
1801
1802 if (adapter->mfe_shared) {
1803 mutex_lock (&adapter->mfe_lock);
1804
1805 if (adapter->mfe_dvbdev == NULL)
1806 adapter->mfe_dvbdev = dvbdev;
1807
1808 else if (adapter->mfe_dvbdev != dvbdev) {
1809 struct dvb_device
1810 *mfedev = adapter->mfe_dvbdev;
1811 struct dvb_frontend
1812 *mfe = mfedev->priv;
1813 struct dvb_frontend_private
1814 *mfepriv = mfe->frontend_priv;
1815 int mferetry = (dvb_mfe_wait_time << 1);
1816
1817 mutex_unlock (&adapter->mfe_lock);
1818 while (mferetry-- && (mfedev->users != -1 ||
1819 mfepriv->thread != NULL)) {
1820 if(msleep_interruptible(500)) {
1821 if(signal_pending(current))
1822 return -EINTR;
1823 }
1824 }
1825
1826 mutex_lock (&adapter->mfe_lock);
1827 if(adapter->mfe_dvbdev != dvbdev) {
1828 mfedev = adapter->mfe_dvbdev;
1829 mfe = mfedev->priv;
1830 mfepriv = mfe->frontend_priv;
1831 if (mfedev->users != -1 ||
1832 mfepriv->thread != NULL) {
1833 mutex_unlock (&adapter->mfe_lock);
1834 return -EBUSY;
1835 }
1836 adapter->mfe_dvbdev = dvbdev;
1837 }
1838 }
1839 }
1840
1841 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
1842 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
1843 goto err0;
1844 }
1845
1846 if ((ret = dvb_generic_open (inode, file)) < 0)
1847 goto err1;
1848
1849 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
1850 /* normal tune mode when opened R/W */
1851 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
1852 fepriv->tone = -1;
1853 fepriv->voltage = -1;
1854
1855 ret = dvb_frontend_start (fe);
1856 if (ret)
1857 goto err2;
1858
1859 /* empty event queue */
1860 fepriv->events.eventr = fepriv->events.eventw = 0;
1861 }
1862
1863 if (adapter->mfe_shared)
1864 mutex_unlock (&adapter->mfe_lock);
1865 return ret;
1866
1867 err2:
1868 dvb_generic_release(inode, file);
1869 err1:
1870 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
1871 fe->ops.ts_bus_ctrl(fe, 0);
1872 err0:
1873 if (adapter->mfe_shared)
1874 mutex_unlock (&adapter->mfe_lock);
1875 return ret;
1876 }
1877
1878 static int dvb_frontend_release(struct inode *inode, struct file *file)
1879 {
1880 struct dvb_device *dvbdev = file->private_data;
1881 struct dvb_frontend *fe = dvbdev->priv;
1882 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1883 int ret;
1884
1885 dprintk ("%s\n", __func__);
1886
1887 if ((file->f_flags & O_ACCMODE) != O_RDONLY)
1888 fepriv->release_jiffies = jiffies;
1889
1890 ret = dvb_generic_release (inode, file);
1891
1892 if (dvbdev->users == -1) {
1893 if (fepriv->exit == 1) {
1894 fops_put(file->f_op);
1895 file->f_op = NULL;
1896 wake_up(&dvbdev->wait_queue);
1897 }
1898 if (fe->ops.ts_bus_ctrl)
1899 fe->ops.ts_bus_ctrl(fe, 0);
1900 }
1901
1902 return ret;
1903 }
1904
1905 static const struct file_operations dvb_frontend_fops = {
1906 .owner = THIS_MODULE,
1907 .ioctl = dvb_generic_ioctl,
1908 .poll = dvb_frontend_poll,
1909 .open = dvb_frontend_open,
1910 .release = dvb_frontend_release
1911 };
1912
1913 int dvb_register_frontend(struct dvb_adapter* dvb,
1914 struct dvb_frontend* fe)
1915 {
1916 struct dvb_frontend_private *fepriv;
1917 static const struct dvb_device dvbdev_template = {
1918 .users = ~0,
1919 .writers = 1,
1920 .readers = (~0)-1,
1921 .fops = &dvb_frontend_fops,
1922 .kernel_ioctl = dvb_frontend_ioctl
1923 };
1924
1925 dprintk ("%s\n", __func__);
1926
1927 if (mutex_lock_interruptible(&frontend_mutex))
1928 return -ERESTARTSYS;
1929
1930 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
1931 if (fe->frontend_priv == NULL) {
1932 mutex_unlock(&frontend_mutex);
1933 return -ENOMEM;
1934 }
1935 fepriv = fe->frontend_priv;
1936
1937 init_MUTEX (&fepriv->sem);
1938 init_waitqueue_head (&fepriv->wait_queue);
1939 init_waitqueue_head (&fepriv->events.wait_queue);
1940 mutex_init(&fepriv->events.mtx);
1941 fe->dvb = dvb;
1942 fepriv->inversion = INVERSION_OFF;
1943
1944 printk ("DVB: registering adapter %i frontend %i (%s)...\n",
1945 fe->dvb->num,
1946 fe->id,
1947 fe->ops.info.name);
1948
1949 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
1950 fe, DVB_DEVICE_FRONTEND);
1951
1952 mutex_unlock(&frontend_mutex);
1953 return 0;
1954 }
1955 EXPORT_SYMBOL(dvb_register_frontend);
1956
1957 int dvb_unregister_frontend(struct dvb_frontend* fe)
1958 {
1959 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1960 dprintk ("%s\n", __func__);
1961
1962 mutex_lock(&frontend_mutex);
1963 dvb_frontend_stop (fe);
1964 mutex_unlock(&frontend_mutex);
1965
1966 if (fepriv->dvbdev->users < -1)
1967 wait_event(fepriv->dvbdev->wait_queue,
1968 fepriv->dvbdev->users==-1);
1969
1970 mutex_lock(&frontend_mutex);
1971 dvb_unregister_device (fepriv->dvbdev);
1972
1973 /* fe is invalid now */
1974 kfree(fepriv);
1975 mutex_unlock(&frontend_mutex);
1976 return 0;
1977 }
1978 EXPORT_SYMBOL(dvb_unregister_frontend);
1979
1980 #ifdef CONFIG_MEDIA_ATTACH
1981 void dvb_frontend_detach(struct dvb_frontend* fe)
1982 {
1983 void *ptr;
1984
1985 if (fe->ops.release_sec) {
1986 fe->ops.release_sec(fe);
1987 symbol_put_addr(fe->ops.release_sec);
1988 }
1989 if (fe->ops.tuner_ops.release) {
1990 fe->ops.tuner_ops.release(fe);
1991 symbol_put_addr(fe->ops.tuner_ops.release);
1992 }
1993 if (fe->ops.analog_ops.release) {
1994 fe->ops.analog_ops.release(fe);
1995 symbol_put_addr(fe->ops.analog_ops.release);
1996 }
1997 ptr = (void*)fe->ops.release;
1998 if (ptr) {
1999 fe->ops.release(fe);
2000 symbol_put_addr(ptr);
2001 }
2002 }
2003 #else
2004 void dvb_frontend_detach(struct dvb_frontend* fe)
2005 {
2006 if (fe->ops.release_sec)
2007 fe->ops.release_sec(fe);
2008 if (fe->ops.tuner_ops.release)
2009 fe->ops.tuner_ops.release(fe);
2010 if (fe->ops.analog_ops.release)
2011 fe->ops.analog_ops.release(fe);
2012 if (fe->ops.release)
2013 fe->ops.release(fe);
2014 }
2015 #endif
2016 EXPORT_SYMBOL(dvb_frontend_detach);
Linux with added FPC-III support