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1da177e4 LT |
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/moduleparam.h> | |
36 | #include <linux/list.h> | |
37 | #include <linux/suspend.h> | |
cc89c229 | 38 | #include <linux/jiffies.h> |
1da177e4 | 39 | #include <asm/processor.h> |
1da177e4 LT |
40 | |
41 | #include "dvb_frontend.h" | |
42 | #include "dvbdev.h" | |
43 | ||
44 | static int dvb_frontend_debug; | |
45 | static int dvb_shutdown_timeout = 5; | |
46 | static int dvb_force_auto_inversion; | |
47 | static int dvb_override_tune_delay; | |
48 | static int dvb_powerdown_on_sleep = 1; | |
49 | ||
50 | module_param_named(frontend_debug, dvb_frontend_debug, int, 0644); | |
f4f009a7 | 51 | MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off)."); |
6baad3f0 | 52 | module_param(dvb_shutdown_timeout, int, 0644); |
1da177e4 | 53 | MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); |
6baad3f0 | 54 | module_param(dvb_force_auto_inversion, int, 0644); |
1da177e4 | 55 | MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); |
6baad3f0 | 56 | module_param(dvb_override_tune_delay, int, 0644); |
1da177e4 | 57 | MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt"); |
6baad3f0 | 58 | module_param(dvb_powerdown_on_sleep, int, 0644); |
a8558577 | 59 | MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)"); |
1da177e4 LT |
60 | |
61 | #define dprintk if (dvb_frontend_debug) printk | |
62 | ||
63 | #define FESTATE_IDLE 1 | |
64 | #define FESTATE_RETUNE 2 | |
65 | #define FESTATE_TUNING_FAST 4 | |
66 | #define FESTATE_TUNING_SLOW 8 | |
67 | #define FESTATE_TUNED 16 | |
68 | #define FESTATE_ZIGZAG_FAST 32 | |
69 | #define FESTATE_ZIGZAG_SLOW 64 | |
70 | #define FESTATE_DISEQC 128 | |
71 | #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) | |
72 | #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) | |
73 | #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) | |
74 | #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) | |
75 | /* | |
76 | * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. | |
77 | * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. | |
78 | * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. | |
79 | * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. | |
80 | * FESTATE_TUNED. The frontend has successfully locked on. | |
81 | * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. | |
82 | * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. | |
83 | * FESTATE_DISEQC. A DISEQC command has just been issued. | |
84 | * FESTATE_WAITFORLOCK. When we're waiting for a lock. | |
85 | * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. | |
86 | * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. | |
87 | * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. | |
88 | */ | |
89 | ||
3593cab5 | 90 | static DEFINE_MUTEX(frontend_mutex); |
1da177e4 LT |
91 | |
92 | struct dvb_frontend_private { | |
93 | ||
36cb557a | 94 | /* thread/frontend values */ |
1da177e4 LT |
95 | struct dvb_device *dvbdev; |
96 | struct dvb_frontend_parameters parameters; | |
97 | struct dvb_fe_events events; | |
98 | struct semaphore sem; | |
99 | struct list_head list_head; | |
100 | wait_queue_head_t wait_queue; | |
101 | pid_t thread_pid; | |
102 | unsigned long release_jiffies; | |
36cb557a AQ |
103 | unsigned int exit; |
104 | unsigned int wakeup; | |
1da177e4 | 105 | fe_status_t status; |
400b7083 | 106 | unsigned long tune_mode_flags; |
36cb557a | 107 | unsigned int delay; |
86f40cc3 | 108 | unsigned int reinitialise; |
64454016 AQ |
109 | int tone; |
110 | int voltage; | |
36cb557a AQ |
111 | |
112 | /* swzigzag values */ | |
113 | unsigned int state; | |
114 | unsigned int bending; | |
115 | int lnb_drift; | |
116 | unsigned int inversion; | |
117 | unsigned int auto_step; | |
118 | unsigned int auto_sub_step; | |
119 | unsigned int started_auto_step; | |
120 | unsigned int min_delay; | |
121 | unsigned int max_drift; | |
122 | unsigned int step_size; | |
123 | int quality; | |
124 | unsigned int check_wrapped; | |
1da177e4 LT |
125 | }; |
126 | ||
86f40cc3 | 127 | static void dvb_frontend_wakeup(struct dvb_frontend *fe); |
1da177e4 LT |
128 | |
129 | static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) | |
130 | { | |
0c53c70f | 131 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
132 | struct dvb_fe_events *events = &fepriv->events; |
133 | struct dvb_frontend_event *e; | |
134 | int wp; | |
135 | ||
136 | dprintk ("%s\n", __FUNCTION__); | |
137 | ||
138 | if (down_interruptible (&events->sem)) | |
139 | return; | |
140 | ||
141 | wp = (events->eventw + 1) % MAX_EVENT; | |
142 | ||
143 | if (wp == events->eventr) { | |
144 | events->overflow = 1; | |
145 | events->eventr = (events->eventr + 1) % MAX_EVENT; | |
146 | } | |
147 | ||
148 | e = &events->events[events->eventw]; | |
149 | ||
150 | memcpy (&e->parameters, &fepriv->parameters, | |
151 | sizeof (struct dvb_frontend_parameters)); | |
152 | ||
153 | if (status & FE_HAS_LOCK) | |
dea74869 PB |
154 | if (fe->ops.get_frontend) |
155 | fe->ops.get_frontend(fe, &e->parameters); | |
1da177e4 LT |
156 | |
157 | events->eventw = wp; | |
158 | ||
159 | up (&events->sem); | |
160 | ||
161 | e->status = status; | |
162 | ||
163 | wake_up_interruptible (&events->wait_queue); | |
164 | } | |
165 | ||
166 | static int dvb_frontend_get_event(struct dvb_frontend *fe, | |
167 | struct dvb_frontend_event *event, int flags) | |
168 | { | |
0c53c70f | 169 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
170 | struct dvb_fe_events *events = &fepriv->events; |
171 | ||
172 | dprintk ("%s\n", __FUNCTION__); | |
173 | ||
174 | if (events->overflow) { | |
175 | events->overflow = 0; | |
176 | return -EOVERFLOW; | |
177 | } | |
178 | ||
179 | if (events->eventw == events->eventr) { | |
180 | int ret; | |
181 | ||
182 | if (flags & O_NONBLOCK) | |
183 | return -EWOULDBLOCK; | |
184 | ||
185 | up(&fepriv->sem); | |
186 | ||
187 | ret = wait_event_interruptible (events->wait_queue, | |
188 | events->eventw != events->eventr); | |
189 | ||
190 | if (down_interruptible (&fepriv->sem)) | |
191 | return -ERESTARTSYS; | |
192 | ||
193 | if (ret < 0) | |
194 | return ret; | |
195 | } | |
196 | ||
197 | if (down_interruptible (&events->sem)) | |
198 | return -ERESTARTSYS; | |
199 | ||
200 | memcpy (event, &events->events[events->eventr], | |
201 | sizeof(struct dvb_frontend_event)); | |
202 | ||
203 | events->eventr = (events->eventr + 1) % MAX_EVENT; | |
204 | ||
205 | up (&events->sem); | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | static void dvb_frontend_init(struct dvb_frontend *fe) | |
211 | { | |
212 | dprintk ("DVB: initialising frontend %i (%s)...\n", | |
213 | fe->dvb->num, | |
dea74869 PB |
214 | fe->ops.info.name); |
215 | ||
216 | if (fe->ops.init) | |
217 | fe->ops.init(fe); | |
218 | if (fe->ops.tuner_ops.init) { | |
219 | fe->ops.tuner_ops.init(fe); | |
220 | if (fe->ops.i2c_gate_ctrl) | |
221 | fe->ops.i2c_gate_ctrl(fe, 0); | |
7eef5dd6 | 222 | } |
1da177e4 LT |
223 | } |
224 | ||
86f40cc3 AQ |
225 | void dvb_frontend_reinitialise(struct dvb_frontend *fe) |
226 | { | |
227 | struct dvb_frontend_private *fepriv = fe->frontend_priv; | |
228 | ||
229 | fepriv->reinitialise = 1; | |
230 | dvb_frontend_wakeup(fe); | |
231 | } | |
232 | EXPORT_SYMBOL(dvb_frontend_reinitialise); | |
233 | ||
36cb557a | 234 | static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) |
1da177e4 | 235 | { |
36cb557a | 236 | int q2; |
1da177e4 | 237 | |
36cb557a | 238 | dprintk ("%s\n", __FUNCTION__); |
1da177e4 | 239 | |
36cb557a AQ |
240 | if (locked) |
241 | (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; | |
242 | else | |
243 | (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; | |
1da177e4 | 244 | |
36cb557a AQ |
245 | q2 = fepriv->quality - 128; |
246 | q2 *= q2; | |
1da177e4 | 247 | |
36cb557a | 248 | fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); |
1da177e4 LT |
249 | } |
250 | ||
251 | /** | |
252 | * Performs automatic twiddling of frontend parameters. | |
253 | * | |
254 | * @param fe The frontend concerned. | |
255 | * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT | |
256 | * @returns Number of complete iterations that have been performed. | |
257 | */ | |
36cb557a | 258 | static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) |
1da177e4 LT |
259 | { |
260 | int autoinversion; | |
261 | int ready = 0; | |
0c53c70f | 262 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
263 | int original_inversion = fepriv->parameters.inversion; |
264 | u32 original_frequency = fepriv->parameters.frequency; | |
265 | ||
266 | /* are we using autoinversion? */ | |
dea74869 | 267 | autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && |
1da177e4 LT |
268 | (fepriv->parameters.inversion == INVERSION_AUTO)); |
269 | ||
270 | /* setup parameters correctly */ | |
271 | while(!ready) { | |
272 | /* calculate the lnb_drift */ | |
273 | fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; | |
274 | ||
275 | /* wrap the auto_step if we've exceeded the maximum drift */ | |
276 | if (fepriv->lnb_drift > fepriv->max_drift) { | |
277 | fepriv->auto_step = 0; | |
278 | fepriv->auto_sub_step = 0; | |
279 | fepriv->lnb_drift = 0; | |
280 | } | |
281 | ||
282 | /* perform inversion and +/- zigzag */ | |
283 | switch(fepriv->auto_sub_step) { | |
284 | case 0: | |
285 | /* try with the current inversion and current drift setting */ | |
286 | ready = 1; | |
287 | break; | |
288 | ||
289 | case 1: | |
290 | if (!autoinversion) break; | |
291 | ||
292 | fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; | |
293 | ready = 1; | |
294 | break; | |
295 | ||
296 | case 2: | |
297 | if (fepriv->lnb_drift == 0) break; | |
298 | ||
299 | fepriv->lnb_drift = -fepriv->lnb_drift; | |
300 | ready = 1; | |
301 | break; | |
302 | ||
303 | case 3: | |
304 | if (fepriv->lnb_drift == 0) break; | |
305 | if (!autoinversion) break; | |
306 | ||
307 | fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; | |
308 | fepriv->lnb_drift = -fepriv->lnb_drift; | |
309 | ready = 1; | |
310 | break; | |
311 | ||
312 | default: | |
313 | fepriv->auto_step++; | |
314 | fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ | |
315 | break; | |
316 | } | |
317 | ||
318 | if (!ready) fepriv->auto_sub_step++; | |
319 | } | |
320 | ||
321 | /* if this attempt would hit where we started, indicate a complete | |
322 | * iteration has occurred */ | |
323 | if ((fepriv->auto_step == fepriv->started_auto_step) && | |
324 | (fepriv->auto_sub_step == 0) && check_wrapped) { | |
325 | return 1; | |
326 | } | |
327 | ||
328 | dprintk("%s: drift:%i inversion:%i auto_step:%i " | |
329 | "auto_sub_step:%i started_auto_step:%i\n", | |
330 | __FUNCTION__, fepriv->lnb_drift, fepriv->inversion, | |
331 | fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step); | |
332 | ||
333 | /* set the frontend itself */ | |
334 | fepriv->parameters.frequency += fepriv->lnb_drift; | |
335 | if (autoinversion) | |
336 | fepriv->parameters.inversion = fepriv->inversion; | |
dea74869 PB |
337 | if (fe->ops.set_frontend) |
338 | fe->ops.set_frontend(fe, &fepriv->parameters); | |
1da177e4 LT |
339 | |
340 | fepriv->parameters.frequency = original_frequency; | |
341 | fepriv->parameters.inversion = original_inversion; | |
342 | ||
343 | fepriv->auto_sub_step++; | |
344 | return 0; | |
345 | } | |
346 | ||
36cb557a AQ |
347 | static void dvb_frontend_swzigzag(struct dvb_frontend *fe) |
348 | { | |
349 | fe_status_t s; | |
350 | struct dvb_frontend_private *fepriv = fe->frontend_priv; | |
351 | ||
352 | /* if we've got no parameters, just keep idling */ | |
353 | if (fepriv->state & FESTATE_IDLE) { | |
354 | fepriv->delay = 3*HZ; | |
355 | fepriv->quality = 0; | |
356 | return; | |
357 | } | |
358 | ||
359 | /* in SCAN mode, we just set the frontend when asked and leave it alone */ | |
360 | if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { | |
361 | if (fepriv->state & FESTATE_RETUNE) { | |
dea74869 PB |
362 | if (fe->ops.set_frontend) |
363 | fe->ops.set_frontend(fe, &fepriv->parameters); | |
36cb557a AQ |
364 | fepriv->state = FESTATE_TUNED; |
365 | } | |
366 | fepriv->delay = 3*HZ; | |
367 | fepriv->quality = 0; | |
368 | return; | |
369 | } | |
370 | ||
371 | /* get the frontend status */ | |
372 | if (fepriv->state & FESTATE_RETUNE) { | |
373 | s = 0; | |
374 | } else { | |
dea74869 PB |
375 | if (fe->ops.read_status) |
376 | fe->ops.read_status(fe, &s); | |
36cb557a AQ |
377 | if (s != fepriv->status) { |
378 | dvb_frontend_add_event(fe, s); | |
379 | fepriv->status = s; | |
380 | } | |
381 | } | |
382 | ||
383 | /* if we're not tuned, and we have a lock, move to the TUNED state */ | |
384 | if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { | |
385 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); | |
386 | fepriv->state = FESTATE_TUNED; | |
387 | ||
388 | /* if we're tuned, then we have determined the correct inversion */ | |
dea74869 | 389 | if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && |
36cb557a AQ |
390 | (fepriv->parameters.inversion == INVERSION_AUTO)) { |
391 | fepriv->parameters.inversion = fepriv->inversion; | |
392 | } | |
393 | return; | |
394 | } | |
395 | ||
396 | /* if we are tuned already, check we're still locked */ | |
397 | if (fepriv->state & FESTATE_TUNED) { | |
398 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); | |
399 | ||
400 | /* we're tuned, and the lock is still good... */ | |
401 | if (s & FE_HAS_LOCK) { | |
402 | return; | |
403 | } else { /* if we _WERE_ tuned, but now don't have a lock */ | |
404 | fepriv->state = FESTATE_ZIGZAG_FAST; | |
405 | fepriv->started_auto_step = fepriv->auto_step; | |
406 | fepriv->check_wrapped = 0; | |
407 | } | |
408 | } | |
409 | ||
410 | /* don't actually do anything if we're in the LOSTLOCK state, | |
411 | * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ | |
412 | if ((fepriv->state & FESTATE_LOSTLOCK) && | |
dea74869 | 413 | (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { |
36cb557a AQ |
414 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
415 | return; | |
416 | } | |
417 | ||
418 | /* don't do anything if we're in the DISEQC state, since this | |
419 | * might be someone with a motorized dish controlled by DISEQC. | |
420 | * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ | |
421 | if (fepriv->state & FESTATE_DISEQC) { | |
422 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); | |
423 | return; | |
424 | } | |
425 | ||
426 | /* if we're in the RETUNE state, set everything up for a brand | |
427 | * new scan, keeping the current inversion setting, as the next | |
428 | * tune is _very_ likely to require the same */ | |
429 | if (fepriv->state & FESTATE_RETUNE) { | |
430 | fepriv->lnb_drift = 0; | |
431 | fepriv->auto_step = 0; | |
432 | fepriv->auto_sub_step = 0; | |
433 | fepriv->started_auto_step = 0; | |
434 | fepriv->check_wrapped = 0; | |
435 | } | |
436 | ||
437 | /* fast zigzag. */ | |
438 | if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { | |
439 | fepriv->delay = fepriv->min_delay; | |
440 | ||
441 | /* peform a tune */ | |
442 | if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) { | |
443 | /* OK, if we've run out of trials at the fast speed. | |
444 | * Drop back to slow for the _next_ attempt */ | |
445 | fepriv->state = FESTATE_SEARCHING_SLOW; | |
446 | fepriv->started_auto_step = fepriv->auto_step; | |
447 | return; | |
448 | } | |
449 | fepriv->check_wrapped = 1; | |
450 | ||
451 | /* if we've just retuned, enter the ZIGZAG_FAST state. | |
452 | * This ensures we cannot return from an | |
453 | * FE_SET_FRONTEND ioctl before the first frontend tune | |
454 | * occurs */ | |
455 | if (fepriv->state & FESTATE_RETUNE) { | |
456 | fepriv->state = FESTATE_TUNING_FAST; | |
457 | } | |
458 | } | |
459 | ||
460 | /* slow zigzag */ | |
461 | if (fepriv->state & FESTATE_SEARCHING_SLOW) { | |
462 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); | |
463 | ||
464 | /* Note: don't bother checking for wrapping; we stay in this | |
465 | * state until we get a lock */ | |
466 | dvb_frontend_swzigzag_autotune(fe, 0); | |
467 | } | |
468 | } | |
469 | ||
1da177e4 LT |
470 | static int dvb_frontend_is_exiting(struct dvb_frontend *fe) |
471 | { | |
0c53c70f | 472 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
473 | |
474 | if (fepriv->exit) | |
475 | return 1; | |
476 | ||
477 | if (fepriv->dvbdev->writers == 1) | |
cc89c229 | 478 | if (time_after(jiffies, fepriv->release_jiffies + |
36cb557a | 479 | dvb_shutdown_timeout * HZ)) |
1da177e4 LT |
480 | return 1; |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) | |
486 | { | |
0c53c70f | 487 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
488 | |
489 | if (fepriv->wakeup) { | |
490 | fepriv->wakeup = 0; | |
491 | return 1; | |
492 | } | |
493 | return dvb_frontend_is_exiting(fe); | |
494 | } | |
495 | ||
496 | static void dvb_frontend_wakeup(struct dvb_frontend *fe) | |
497 | { | |
0c53c70f | 498 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
499 | |
500 | fepriv->wakeup = 1; | |
501 | wake_up_interruptible(&fepriv->wait_queue); | |
502 | } | |
503 | ||
1da177e4 LT |
504 | static int dvb_frontend_thread(void *data) |
505 | { | |
0c53c70f JS |
506 | struct dvb_frontend *fe = data; |
507 | struct dvb_frontend_private *fepriv = fe->frontend_priv; | |
1da177e4 LT |
508 | unsigned long timeout; |
509 | char name [15]; | |
1da177e4 | 510 | fe_status_t s; |
36cb557a | 511 | struct dvb_frontend_parameters *params; |
1da177e4 LT |
512 | |
513 | dprintk("%s\n", __FUNCTION__); | |
514 | ||
515 | snprintf (name, sizeof(name), "kdvb-fe-%i", fe->dvb->num); | |
516 | ||
afd1a0c9 MCC |
517 | lock_kernel(); |
518 | daemonize(name); | |
519 | sigfillset(¤t->blocked); | |
520 | unlock_kernel(); | |
1da177e4 | 521 | |
36cb557a AQ |
522 | fepriv->check_wrapped = 0; |
523 | fepriv->quality = 0; | |
524 | fepriv->delay = 3*HZ; | |
1da177e4 | 525 | fepriv->status = 0; |
1da177e4 | 526 | fepriv->wakeup = 0; |
86f40cc3 | 527 | fepriv->reinitialise = 1; |
1da177e4 LT |
528 | |
529 | while (1) { | |
530 | up(&fepriv->sem); /* is locked when we enter the thread... */ | |
531 | ||
532 | timeout = wait_event_interruptible_timeout(fepriv->wait_queue, | |
533 | dvb_frontend_should_wakeup(fe), | |
36cb557a | 534 | fepriv->delay); |
1da177e4 LT |
535 | if (0 != dvb_frontend_is_exiting(fe)) { |
536 | /* got signal or quitting */ | |
537 | break; | |
538 | } | |
539 | ||
3e1d1d28 | 540 | try_to_freeze(); |
1da177e4 LT |
541 | |
542 | if (down_interruptible(&fepriv->sem)) | |
543 | break; | |
544 | ||
86f40cc3 AQ |
545 | if (fepriv->reinitialise) { |
546 | dvb_frontend_init(fe); | |
64454016 | 547 | if (fepriv->tone != -1) { |
dea74869 | 548 | fe->ops.set_tone(fe, fepriv->tone); |
64454016 AQ |
549 | } |
550 | if (fepriv->voltage != -1) { | |
dea74869 | 551 | fe->ops.set_voltage(fe, fepriv->voltage); |
64454016 | 552 | } |
86f40cc3 AQ |
553 | fepriv->reinitialise = 0; |
554 | } | |
555 | ||
36cb557a | 556 | /* do an iteration of the tuning loop */ |
dea74869 | 557 | if (fe->ops.tune) { |
36cb557a AQ |
558 | /* have we been asked to retune? */ |
559 | params = NULL; | |
560 | if (fepriv->state & FESTATE_RETUNE) { | |
561 | params = &fepriv->parameters; | |
562 | fepriv->state = FESTATE_TUNED; | |
563 | } | |
1da177e4 | 564 | |
dea74869 | 565 | fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s); |
1da177e4 LT |
566 | if (s != fepriv->status) { |
567 | dvb_frontend_add_event(fe, s); | |
568 | fepriv->status = s; | |
569 | } | |
36cb557a AQ |
570 | } else { |
571 | dvb_frontend_swzigzag(fe); | |
1da177e4 LT |
572 | } |
573 | } | |
574 | ||
575 | if (dvb_shutdown_timeout) { | |
576 | if (dvb_powerdown_on_sleep) | |
dea74869 PB |
577 | if (fe->ops.set_voltage) |
578 | fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); | |
579 | if (fe->ops.tuner_ops.sleep) { | |
580 | fe->ops.tuner_ops.sleep(fe); | |
581 | if (fe->ops.i2c_gate_ctrl) | |
582 | fe->ops.i2c_gate_ctrl(fe, 0); | |
7eef5dd6 | 583 | } |
dea74869 PB |
584 | if (fe->ops.sleep) |
585 | fe->ops.sleep(fe); | |
1da177e4 LT |
586 | } |
587 | ||
588 | fepriv->thread_pid = 0; | |
589 | mb(); | |
590 | ||
591 | dvb_frontend_wakeup(fe); | |
592 | return 0; | |
593 | } | |
594 | ||
595 | static void dvb_frontend_stop(struct dvb_frontend *fe) | |
596 | { | |
597 | unsigned long ret; | |
0c53c70f | 598 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
599 | |
600 | dprintk ("%s\n", __FUNCTION__); | |
601 | ||
602 | fepriv->exit = 1; | |
603 | mb(); | |
604 | ||
605 | if (!fepriv->thread_pid) | |
606 | return; | |
607 | ||
608 | /* check if the thread is really alive */ | |
609 | if (kill_proc(fepriv->thread_pid, 0, 1) == -ESRCH) { | |
610 | printk("dvb_frontend_stop: thread PID %d already died\n", | |
611 | fepriv->thread_pid); | |
612 | /* make sure the mutex was not held by the thread */ | |
613 | init_MUTEX (&fepriv->sem); | |
614 | return; | |
615 | } | |
616 | ||
617 | /* wake up the frontend thread, so it notices that fe->exit == 1 */ | |
618 | dvb_frontend_wakeup(fe); | |
619 | ||
620 | /* wait until the frontend thread has exited */ | |
621 | ret = wait_event_interruptible(fepriv->wait_queue,0 == fepriv->thread_pid); | |
622 | if (-ERESTARTSYS != ret) { | |
623 | fepriv->state = FESTATE_IDLE; | |
624 | return; | |
625 | } | |
626 | fepriv->state = FESTATE_IDLE; | |
627 | ||
628 | /* paranoia check in case a signal arrived */ | |
629 | if (fepriv->thread_pid) | |
630 | printk("dvb_frontend_stop: warning: thread PID %d won't exit\n", | |
631 | fepriv->thread_pid); | |
632 | } | |
633 | ||
83b75b04 N |
634 | s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) |
635 | { | |
636 | return ((curtime.tv_usec < lasttime.tv_usec) ? | |
637 | 1000000 - lasttime.tv_usec + curtime.tv_usec : | |
638 | curtime.tv_usec - lasttime.tv_usec); | |
639 | } | |
640 | EXPORT_SYMBOL(timeval_usec_diff); | |
641 | ||
642 | static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) | |
643 | { | |
644 | curtime->tv_usec += add_usec; | |
645 | if (curtime->tv_usec >= 1000000) { | |
646 | curtime->tv_usec -= 1000000; | |
647 | curtime->tv_sec++; | |
648 | } | |
649 | } | |
650 | ||
651 | /* | |
652 | * Sleep until gettimeofday() > waketime + add_usec | |
653 | * This needs to be as precise as possible, but as the delay is | |
654 | * usually between 2ms and 32ms, it is done using a scheduled msleep | |
655 | * followed by usleep (normally a busy-wait loop) for the remainder | |
656 | */ | |
657 | void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) | |
658 | { | |
659 | struct timeval lasttime; | |
660 | s32 delta, newdelta; | |
661 | ||
662 | timeval_usec_add(waketime, add_usec); | |
663 | ||
664 | do_gettimeofday(&lasttime); | |
665 | delta = timeval_usec_diff(lasttime, *waketime); | |
666 | if (delta > 2500) { | |
667 | msleep((delta - 1500) / 1000); | |
668 | do_gettimeofday(&lasttime); | |
669 | newdelta = timeval_usec_diff(lasttime, *waketime); | |
670 | delta = (newdelta > delta) ? 0 : newdelta; | |
671 | } | |
672 | if (delta > 0) | |
673 | udelay(delta); | |
674 | } | |
675 | EXPORT_SYMBOL(dvb_frontend_sleep_until); | |
676 | ||
1da177e4 LT |
677 | static int dvb_frontend_start(struct dvb_frontend *fe) |
678 | { | |
679 | int ret; | |
0c53c70f | 680 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
681 | |
682 | dprintk ("%s\n", __FUNCTION__); | |
683 | ||
684 | if (fepriv->thread_pid) { | |
685 | if (!fepriv->exit) | |
686 | return 0; | |
687 | else | |
688 | dvb_frontend_stop (fe); | |
689 | } | |
690 | ||
691 | if (signal_pending(current)) | |
692 | return -EINTR; | |
693 | if (down_interruptible (&fepriv->sem)) | |
694 | return -EINTR; | |
695 | ||
696 | fepriv->state = FESTATE_IDLE; | |
697 | fepriv->exit = 0; | |
698 | fepriv->thread_pid = 0; | |
699 | mb(); | |
700 | ||
701 | ret = kernel_thread (dvb_frontend_thread, fe, 0); | |
702 | ||
703 | if (ret < 0) { | |
704 | printk("dvb_frontend_start: failed to start kernel_thread (%d)\n", ret); | |
705 | up(&fepriv->sem); | |
706 | return ret; | |
707 | } | |
708 | fepriv->thread_pid = ret; | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | static int dvb_frontend_ioctl(struct inode *inode, struct file *file, | |
714 | unsigned int cmd, void *parg) | |
715 | { | |
716 | struct dvb_device *dvbdev = file->private_data; | |
717 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 718 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
719 | int err = -EOPNOTSUPP; |
720 | ||
721 | dprintk ("%s\n", __FUNCTION__); | |
722 | ||
723 | if (!fe || fepriv->exit) | |
724 | return -ENODEV; | |
725 | ||
726 | if ((file->f_flags & O_ACCMODE) == O_RDONLY && | |
727 | (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || | |
728 | cmd == FE_DISEQC_RECV_SLAVE_REPLY)) | |
729 | return -EPERM; | |
730 | ||
731 | if (down_interruptible (&fepriv->sem)) | |
732 | return -ERESTARTSYS; | |
733 | ||
734 | switch (cmd) { | |
735 | case FE_GET_INFO: { | |
0c53c70f | 736 | struct dvb_frontend_info* info = parg; |
dea74869 | 737 | memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); |
1da177e4 LT |
738 | |
739 | /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't | |
740 | * do it, it is done for it. */ | |
741 | info->caps |= FE_CAN_INVERSION_AUTO; | |
742 | err = 0; | |
743 | break; | |
744 | } | |
745 | ||
6757ccc5 PB |
746 | case FE_READ_STATUS: { |
747 | fe_status_t* status = parg; | |
748 | ||
749 | /* if retune was requested but hasn't occured yet, prevent | |
750 | * that user get signal state from previous tuning */ | |
751 | if(fepriv->state == FESTATE_RETUNE) { | |
752 | err=0; | |
753 | *status = 0; | |
754 | break; | |
755 | } | |
756 | ||
dea74869 PB |
757 | if (fe->ops.read_status) |
758 | err = fe->ops.read_status(fe, status); | |
1da177e4 | 759 | break; |
6757ccc5 | 760 | } |
1da177e4 | 761 | case FE_READ_BER: |
dea74869 PB |
762 | if (fe->ops.read_ber) |
763 | err = fe->ops.read_ber(fe, (__u32*) parg); | |
1da177e4 LT |
764 | break; |
765 | ||
766 | case FE_READ_SIGNAL_STRENGTH: | |
dea74869 PB |
767 | if (fe->ops.read_signal_strength) |
768 | err = fe->ops.read_signal_strength(fe, (__u16*) parg); | |
1da177e4 LT |
769 | break; |
770 | ||
771 | case FE_READ_SNR: | |
dea74869 PB |
772 | if (fe->ops.read_snr) |
773 | err = fe->ops.read_snr(fe, (__u16*) parg); | |
1da177e4 LT |
774 | break; |
775 | ||
776 | case FE_READ_UNCORRECTED_BLOCKS: | |
dea74869 PB |
777 | if (fe->ops.read_ucblocks) |
778 | err = fe->ops.read_ucblocks(fe, (__u32*) parg); | |
1da177e4 LT |
779 | break; |
780 | ||
781 | ||
782 | case FE_DISEQC_RESET_OVERLOAD: | |
dea74869 PB |
783 | if (fe->ops.diseqc_reset_overload) { |
784 | err = fe->ops.diseqc_reset_overload(fe); | |
1da177e4 LT |
785 | fepriv->state = FESTATE_DISEQC; |
786 | fepriv->status = 0; | |
787 | } | |
788 | break; | |
789 | ||
790 | case FE_DISEQC_SEND_MASTER_CMD: | |
dea74869 PB |
791 | if (fe->ops.diseqc_send_master_cmd) { |
792 | err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); | |
1da177e4 LT |
793 | fepriv->state = FESTATE_DISEQC; |
794 | fepriv->status = 0; | |
795 | } | |
796 | break; | |
797 | ||
798 | case FE_DISEQC_SEND_BURST: | |
dea74869 PB |
799 | if (fe->ops.diseqc_send_burst) { |
800 | err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); | |
1da177e4 LT |
801 | fepriv->state = FESTATE_DISEQC; |
802 | fepriv->status = 0; | |
803 | } | |
804 | break; | |
805 | ||
806 | case FE_SET_TONE: | |
dea74869 PB |
807 | if (fe->ops.set_tone) { |
808 | err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); | |
64454016 | 809 | fepriv->tone = (fe_sec_tone_mode_t) parg; |
1da177e4 LT |
810 | fepriv->state = FESTATE_DISEQC; |
811 | fepriv->status = 0; | |
812 | } | |
813 | break; | |
814 | ||
815 | case FE_SET_VOLTAGE: | |
dea74869 PB |
816 | if (fe->ops.set_voltage) { |
817 | err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); | |
64454016 | 818 | fepriv->voltage = (fe_sec_voltage_t) parg; |
1da177e4 LT |
819 | fepriv->state = FESTATE_DISEQC; |
820 | fepriv->status = 0; | |
821 | } | |
822 | break; | |
823 | ||
824 | case FE_DISHNETWORK_SEND_LEGACY_CMD: | |
dea74869 PB |
825 | if (fe->ops.dishnetwork_send_legacy_command) { |
826 | err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); | |
1da177e4 LT |
827 | fepriv->state = FESTATE_DISEQC; |
828 | fepriv->status = 0; | |
dea74869 | 829 | } else if (fe->ops.set_voltage) { |
83b75b04 N |
830 | /* |
831 | * NOTE: This is a fallback condition. Some frontends | |
832 | * (stv0299 for instance) take longer than 8msec to | |
833 | * respond to a set_voltage command. Those switches | |
834 | * need custom routines to switch properly. For all | |
835 | * other frontends, the following shoule work ok. | |
836 | * Dish network legacy switches (as used by Dish500) | |
837 | * are controlled by sending 9-bit command words | |
838 | * spaced 8msec apart. | |
839 | * the actual command word is switch/port dependant | |
840 | * so it is up to the userspace application to send | |
841 | * the right command. | |
842 | * The command must always start with a '0' after | |
843 | * initialization, so parg is 8 bits and does not | |
844 | * include the initialization or start bit | |
845 | */ | |
400b7083 | 846 | unsigned long cmd = ((unsigned long) parg) << 1; |
83b75b04 N |
847 | struct timeval nexttime; |
848 | struct timeval tv[10]; | |
849 | int i; | |
850 | u8 last = 1; | |
851 | if (dvb_frontend_debug) | |
400b7083 | 852 | printk("%s switch command: 0x%04lx\n", __FUNCTION__, cmd); |
83b75b04 N |
853 | do_gettimeofday(&nexttime); |
854 | if (dvb_frontend_debug) | |
855 | memcpy(&tv[0], &nexttime, sizeof(struct timeval)); | |
856 | /* before sending a command, initialize by sending | |
857 | * a 32ms 18V to the switch | |
858 | */ | |
dea74869 | 859 | fe->ops.set_voltage(fe, SEC_VOLTAGE_18); |
83b75b04 N |
860 | dvb_frontend_sleep_until(&nexttime, 32000); |
861 | ||
862 | for (i = 0; i < 9; i++) { | |
863 | if (dvb_frontend_debug) | |
864 | do_gettimeofday(&tv[i + 1]); | |
865 | if ((cmd & 0x01) != last) { | |
866 | /* set voltage to (last ? 13V : 18V) */ | |
dea74869 | 867 | fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); |
83b75b04 N |
868 | last = (last) ? 0 : 1; |
869 | } | |
870 | cmd = cmd >> 1; | |
871 | if (i != 8) | |
872 | dvb_frontend_sleep_until(&nexttime, 8000); | |
873 | } | |
874 | if (dvb_frontend_debug) { | |
875 | printk("%s(%d): switch delay (should be 32k followed by all 8k\n", | |
876 | __FUNCTION__, fe->dvb->num); | |
877 | for (i = 1; i < 10; i++) | |
878 | printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); | |
879 | } | |
880 | err = 0; | |
881 | fepriv->state = FESTATE_DISEQC; | |
882 | fepriv->status = 0; | |
1da177e4 LT |
883 | } |
884 | break; | |
885 | ||
886 | case FE_DISEQC_RECV_SLAVE_REPLY: | |
dea74869 PB |
887 | if (fe->ops.diseqc_recv_slave_reply) |
888 | err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); | |
1da177e4 LT |
889 | break; |
890 | ||
891 | case FE_ENABLE_HIGH_LNB_VOLTAGE: | |
dea74869 PB |
892 | if (fe->ops.enable_high_lnb_voltage) |
893 | err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); | |
1da177e4 LT |
894 | break; |
895 | ||
896 | case FE_SET_FRONTEND: { | |
897 | struct dvb_frontend_tune_settings fetunesettings; | |
898 | ||
899 | memcpy (&fepriv->parameters, parg, | |
900 | sizeof (struct dvb_frontend_parameters)); | |
901 | ||
902 | memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); | |
903 | memcpy(&fetunesettings.parameters, parg, | |
904 | sizeof (struct dvb_frontend_parameters)); | |
905 | ||
906 | /* force auto frequency inversion if requested */ | |
907 | if (dvb_force_auto_inversion) { | |
908 | fepriv->parameters.inversion = INVERSION_AUTO; | |
909 | fetunesettings.parameters.inversion = INVERSION_AUTO; | |
910 | } | |
dea74869 | 911 | if (fe->ops.info.type == FE_OFDM) { |
1da177e4 LT |
912 | /* without hierachical coding code_rate_LP is irrelevant, |
913 | * so we tolerate the otherwise invalid FEC_NONE setting */ | |
914 | if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE && | |
915 | fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE) | |
916 | fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO; | |
917 | } | |
918 | ||
919 | /* get frontend-specific tuning settings */ | |
dea74869 | 920 | if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { |
1da177e4 LT |
921 | fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; |
922 | fepriv->max_drift = fetunesettings.max_drift; | |
923 | fepriv->step_size = fetunesettings.step_size; | |
924 | } else { | |
925 | /* default values */ | |
dea74869 | 926 | switch(fe->ops.info.type) { |
1da177e4 LT |
927 | case FE_QPSK: |
928 | fepriv->min_delay = HZ/20; | |
929 | fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000; | |
930 | fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000; | |
931 | break; | |
932 | ||
933 | case FE_QAM: | |
934 | fepriv->min_delay = HZ/20; | |
935 | fepriv->step_size = 0; /* no zigzag */ | |
936 | fepriv->max_drift = 0; | |
937 | break; | |
938 | ||
939 | case FE_OFDM: | |
940 | fepriv->min_delay = HZ/20; | |
dea74869 PB |
941 | fepriv->step_size = fe->ops.info.frequency_stepsize * 2; |
942 | fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; | |
1da177e4 LT |
943 | break; |
944 | case FE_ATSC: | |
4821fb1d MA |
945 | fepriv->min_delay = HZ/20; |
946 | fepriv->step_size = 0; | |
947 | fepriv->max_drift = 0; | |
1da177e4 LT |
948 | break; |
949 | } | |
950 | } | |
951 | if (dvb_override_tune_delay > 0) | |
952 | fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; | |
953 | ||
954 | fepriv->state = FESTATE_RETUNE; | |
955 | dvb_frontend_wakeup(fe); | |
956 | dvb_frontend_add_event(fe, 0); | |
957 | fepriv->status = 0; | |
958 | err = 0; | |
959 | break; | |
960 | } | |
961 | ||
962 | case FE_GET_EVENT: | |
963 | err = dvb_frontend_get_event (fe, parg, file->f_flags); | |
964 | break; | |
965 | ||
966 | case FE_GET_FRONTEND: | |
dea74869 | 967 | if (fe->ops.get_frontend) { |
1da177e4 | 968 | memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters)); |
dea74869 | 969 | err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg); |
1da177e4 LT |
970 | } |
971 | break; | |
36cb557a AQ |
972 | |
973 | case FE_SET_FRONTEND_TUNE_MODE: | |
e18828e4 | 974 | fepriv->tune_mode_flags = (unsigned long) parg; |
36cb557a | 975 | break; |
1da177e4 LT |
976 | }; |
977 | ||
978 | up (&fepriv->sem); | |
979 | return err; | |
980 | } | |
981 | ||
982 | static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) | |
983 | { | |
984 | struct dvb_device *dvbdev = file->private_data; | |
985 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 986 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
987 | |
988 | dprintk ("%s\n", __FUNCTION__); | |
989 | ||
990 | poll_wait (file, &fepriv->events.wait_queue, wait); | |
991 | ||
992 | if (fepriv->events.eventw != fepriv->events.eventr) | |
993 | return (POLLIN | POLLRDNORM | POLLPRI); | |
994 | ||
995 | return 0; | |
996 | } | |
997 | ||
998 | static int dvb_frontend_open(struct inode *inode, struct file *file) | |
999 | { | |
1000 | struct dvb_device *dvbdev = file->private_data; | |
1001 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 1002 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
1003 | int ret; |
1004 | ||
1005 | dprintk ("%s\n", __FUNCTION__); | |
1006 | ||
1007 | if ((ret = dvb_generic_open (inode, file)) < 0) | |
1008 | return ret; | |
1009 | ||
1010 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) { | |
1011 | ret = dvb_frontend_start (fe); | |
1012 | if (ret) | |
1013 | dvb_generic_release (inode, file); | |
1014 | ||
1015 | /* empty event queue */ | |
1016 | fepriv->events.eventr = fepriv->events.eventw = 0; | |
36cb557a AQ |
1017 | |
1018 | /* normal tune mode when opened R/W */ | |
1019 | fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; | |
64454016 AQ |
1020 | fepriv->tone = -1; |
1021 | fepriv->voltage = -1; | |
1da177e4 LT |
1022 | } |
1023 | ||
1024 | return ret; | |
1025 | } | |
1026 | ||
1027 | static int dvb_frontend_release(struct inode *inode, struct file *file) | |
1028 | { | |
1029 | struct dvb_device *dvbdev = file->private_data; | |
1030 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 1031 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
1032 | |
1033 | dprintk ("%s\n", __FUNCTION__); | |
1034 | ||
1035 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) | |
1036 | fepriv->release_jiffies = jiffies; | |
1037 | ||
1038 | return dvb_generic_release (inode, file); | |
1039 | } | |
1040 | ||
1041 | static struct file_operations dvb_frontend_fops = { | |
1042 | .owner = THIS_MODULE, | |
1043 | .ioctl = dvb_generic_ioctl, | |
1044 | .poll = dvb_frontend_poll, | |
1045 | .open = dvb_frontend_open, | |
1046 | .release = dvb_frontend_release | |
1047 | }; | |
1048 | ||
1049 | int dvb_register_frontend(struct dvb_adapter* dvb, | |
1050 | struct dvb_frontend* fe) | |
1051 | { | |
1052 | struct dvb_frontend_private *fepriv; | |
1053 | static const struct dvb_device dvbdev_template = { | |
1054 | .users = ~0, | |
1055 | .writers = 1, | |
1056 | .readers = (~0)-1, | |
1057 | .fops = &dvb_frontend_fops, | |
1058 | .kernel_ioctl = dvb_frontend_ioctl | |
1059 | }; | |
1060 | ||
1061 | dprintk ("%s\n", __FUNCTION__); | |
1062 | ||
3593cab5 | 1063 | if (mutex_lock_interruptible(&frontend_mutex)) |
1da177e4 LT |
1064 | return -ERESTARTSYS; |
1065 | ||
7408187d | 1066 | fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); |
1da177e4 | 1067 | if (fe->frontend_priv == NULL) { |
3593cab5 | 1068 | mutex_unlock(&frontend_mutex); |
1da177e4 LT |
1069 | return -ENOMEM; |
1070 | } | |
0c53c70f | 1071 | fepriv = fe->frontend_priv; |
1da177e4 LT |
1072 | |
1073 | init_MUTEX (&fepriv->sem); | |
1074 | init_waitqueue_head (&fepriv->wait_queue); | |
1075 | init_waitqueue_head (&fepriv->events.wait_queue); | |
1076 | init_MUTEX (&fepriv->events.sem); | |
1077 | fe->dvb = dvb; | |
1078 | fepriv->inversion = INVERSION_OFF; | |
1079 | ||
1080 | printk ("DVB: registering frontend %i (%s)...\n", | |
1081 | fe->dvb->num, | |
dea74869 | 1082 | fe->ops.info.name); |
1da177e4 LT |
1083 | |
1084 | dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, | |
1085 | fe, DVB_DEVICE_FRONTEND); | |
1086 | ||
3593cab5 | 1087 | mutex_unlock(&frontend_mutex); |
1da177e4 LT |
1088 | return 0; |
1089 | } | |
1090 | EXPORT_SYMBOL(dvb_register_frontend); | |
1091 | ||
1092 | int dvb_unregister_frontend(struct dvb_frontend* fe) | |
1093 | { | |
0c53c70f | 1094 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
1095 | dprintk ("%s\n", __FUNCTION__); |
1096 | ||
3593cab5 | 1097 | mutex_lock(&frontend_mutex); |
1da177e4 LT |
1098 | dvb_unregister_device (fepriv->dvbdev); |
1099 | dvb_frontend_stop (fe); | |
dea74869 PB |
1100 | if (fe->ops.tuner_ops.release) { |
1101 | fe->ops.tuner_ops.release(fe); | |
1102 | if (fe->ops.i2c_gate_ctrl) | |
1103 | fe->ops.i2c_gate_ctrl(fe, 0); | |
7eef5dd6 | 1104 | } |
dea74869 PB |
1105 | if (fe->ops.release) |
1106 | fe->ops.release(fe); | |
1da177e4 | 1107 | else |
dea74869 | 1108 | printk("dvb_frontend: Demodulator (%s) does not have a release callback!\n", fe->ops.info.name); |
1da177e4 LT |
1109 | /* fe is invalid now */ |
1110 | kfree(fepriv); | |
3593cab5 | 1111 | mutex_unlock(&frontend_mutex); |
1da177e4 LT |
1112 | return 0; |
1113 | } | |
1114 | EXPORT_SYMBOL(dvb_unregister_frontend); |