]>
Commit | Line | Data |
---|---|---|
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) | |
0249ef16 MA |
75 | |
76 | #define FE_ALGO_HW 1 | |
1da177e4 LT |
77 | /* |
78 | * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. | |
79 | * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. | |
80 | * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. | |
81 | * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. | |
82 | * FESTATE_TUNED. The frontend has successfully locked on. | |
83 | * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. | |
84 | * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. | |
85 | * FESTATE_DISEQC. A DISEQC command has just been issued. | |
86 | * FESTATE_WAITFORLOCK. When we're waiting for a lock. | |
87 | * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. | |
88 | * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. | |
89 | * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. | |
90 | */ | |
91 | ||
3593cab5 | 92 | static DEFINE_MUTEX(frontend_mutex); |
1da177e4 LT |
93 | |
94 | struct dvb_frontend_private { | |
95 | ||
36cb557a | 96 | /* thread/frontend values */ |
1da177e4 LT |
97 | struct dvb_device *dvbdev; |
98 | struct dvb_frontend_parameters parameters; | |
99 | struct dvb_fe_events events; | |
100 | struct semaphore sem; | |
101 | struct list_head list_head; | |
102 | wait_queue_head_t wait_queue; | |
103 | pid_t thread_pid; | |
104 | unsigned long release_jiffies; | |
36cb557a AQ |
105 | unsigned int exit; |
106 | unsigned int wakeup; | |
1da177e4 | 107 | fe_status_t status; |
400b7083 | 108 | unsigned long tune_mode_flags; |
36cb557a | 109 | unsigned int delay; |
86f40cc3 | 110 | unsigned int reinitialise; |
64454016 AQ |
111 | int tone; |
112 | int voltage; | |
36cb557a AQ |
113 | |
114 | /* swzigzag values */ | |
115 | unsigned int state; | |
116 | unsigned int bending; | |
117 | int lnb_drift; | |
118 | unsigned int inversion; | |
119 | unsigned int auto_step; | |
120 | unsigned int auto_sub_step; | |
121 | unsigned int started_auto_step; | |
122 | unsigned int min_delay; | |
123 | unsigned int max_drift; | |
124 | unsigned int step_size; | |
125 | int quality; | |
126 | unsigned int check_wrapped; | |
1da177e4 LT |
127 | }; |
128 | ||
86f40cc3 | 129 | static void dvb_frontend_wakeup(struct dvb_frontend *fe); |
1da177e4 LT |
130 | |
131 | static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) | |
132 | { | |
0c53c70f | 133 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
134 | struct dvb_fe_events *events = &fepriv->events; |
135 | struct dvb_frontend_event *e; | |
136 | int wp; | |
137 | ||
138 | dprintk ("%s\n", __FUNCTION__); | |
139 | ||
140 | if (down_interruptible (&events->sem)) | |
141 | return; | |
142 | ||
143 | wp = (events->eventw + 1) % MAX_EVENT; | |
144 | ||
145 | if (wp == events->eventr) { | |
146 | events->overflow = 1; | |
147 | events->eventr = (events->eventr + 1) % MAX_EVENT; | |
148 | } | |
149 | ||
150 | e = &events->events[events->eventw]; | |
151 | ||
152 | memcpy (&e->parameters, &fepriv->parameters, | |
153 | sizeof (struct dvb_frontend_parameters)); | |
154 | ||
155 | if (status & FE_HAS_LOCK) | |
dea74869 PB |
156 | if (fe->ops.get_frontend) |
157 | fe->ops.get_frontend(fe, &e->parameters); | |
1da177e4 LT |
158 | |
159 | events->eventw = wp; | |
160 | ||
161 | up (&events->sem); | |
162 | ||
163 | e->status = status; | |
164 | ||
165 | wake_up_interruptible (&events->wait_queue); | |
166 | } | |
167 | ||
168 | static int dvb_frontend_get_event(struct dvb_frontend *fe, | |
169 | struct dvb_frontend_event *event, int flags) | |
170 | { | |
0c53c70f | 171 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
172 | struct dvb_fe_events *events = &fepriv->events; |
173 | ||
174 | dprintk ("%s\n", __FUNCTION__); | |
175 | ||
176 | if (events->overflow) { | |
177 | events->overflow = 0; | |
178 | return -EOVERFLOW; | |
179 | } | |
180 | ||
181 | if (events->eventw == events->eventr) { | |
182 | int ret; | |
183 | ||
184 | if (flags & O_NONBLOCK) | |
185 | return -EWOULDBLOCK; | |
186 | ||
187 | up(&fepriv->sem); | |
188 | ||
189 | ret = wait_event_interruptible (events->wait_queue, | |
190 | events->eventw != events->eventr); | |
191 | ||
192 | if (down_interruptible (&fepriv->sem)) | |
193 | return -ERESTARTSYS; | |
194 | ||
195 | if (ret < 0) | |
196 | return ret; | |
197 | } | |
198 | ||
199 | if (down_interruptible (&events->sem)) | |
200 | return -ERESTARTSYS; | |
201 | ||
202 | memcpy (event, &events->events[events->eventr], | |
203 | sizeof(struct dvb_frontend_event)); | |
204 | ||
205 | events->eventr = (events->eventr + 1) % MAX_EVENT; | |
206 | ||
207 | up (&events->sem); | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | static void dvb_frontend_init(struct dvb_frontend *fe) | |
213 | { | |
214 | dprintk ("DVB: initialising frontend %i (%s)...\n", | |
215 | fe->dvb->num, | |
dea74869 PB |
216 | fe->ops.info.name); |
217 | ||
218 | if (fe->ops.init) | |
219 | fe->ops.init(fe); | |
220 | if (fe->ops.tuner_ops.init) { | |
221 | fe->ops.tuner_ops.init(fe); | |
222 | if (fe->ops.i2c_gate_ctrl) | |
223 | fe->ops.i2c_gate_ctrl(fe, 0); | |
7eef5dd6 | 224 | } |
1da177e4 LT |
225 | } |
226 | ||
86f40cc3 AQ |
227 | void dvb_frontend_reinitialise(struct dvb_frontend *fe) |
228 | { | |
229 | struct dvb_frontend_private *fepriv = fe->frontend_priv; | |
230 | ||
231 | fepriv->reinitialise = 1; | |
232 | dvb_frontend_wakeup(fe); | |
233 | } | |
234 | EXPORT_SYMBOL(dvb_frontend_reinitialise); | |
235 | ||
36cb557a | 236 | static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) |
1da177e4 | 237 | { |
36cb557a | 238 | int q2; |
1da177e4 | 239 | |
36cb557a | 240 | dprintk ("%s\n", __FUNCTION__); |
1da177e4 | 241 | |
36cb557a AQ |
242 | if (locked) |
243 | (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; | |
244 | else | |
245 | (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; | |
1da177e4 | 246 | |
36cb557a AQ |
247 | q2 = fepriv->quality - 128; |
248 | q2 *= q2; | |
1da177e4 | 249 | |
36cb557a | 250 | fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); |
1da177e4 LT |
251 | } |
252 | ||
253 | /** | |
254 | * Performs automatic twiddling of frontend parameters. | |
255 | * | |
256 | * @param fe The frontend concerned. | |
257 | * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT | |
258 | * @returns Number of complete iterations that have been performed. | |
259 | */ | |
36cb557a | 260 | static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) |
1da177e4 LT |
261 | { |
262 | int autoinversion; | |
263 | int ready = 0; | |
0c53c70f | 264 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
265 | int original_inversion = fepriv->parameters.inversion; |
266 | u32 original_frequency = fepriv->parameters.frequency; | |
267 | ||
268 | /* are we using autoinversion? */ | |
dea74869 | 269 | autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && |
1da177e4 LT |
270 | (fepriv->parameters.inversion == INVERSION_AUTO)); |
271 | ||
272 | /* setup parameters correctly */ | |
273 | while(!ready) { | |
274 | /* calculate the lnb_drift */ | |
275 | fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; | |
276 | ||
277 | /* wrap the auto_step if we've exceeded the maximum drift */ | |
278 | if (fepriv->lnb_drift > fepriv->max_drift) { | |
279 | fepriv->auto_step = 0; | |
280 | fepriv->auto_sub_step = 0; | |
281 | fepriv->lnb_drift = 0; | |
282 | } | |
283 | ||
284 | /* perform inversion and +/- zigzag */ | |
285 | switch(fepriv->auto_sub_step) { | |
286 | case 0: | |
287 | /* try with the current inversion and current drift setting */ | |
288 | ready = 1; | |
289 | break; | |
290 | ||
291 | case 1: | |
292 | if (!autoinversion) break; | |
293 | ||
294 | fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; | |
295 | ready = 1; | |
296 | break; | |
297 | ||
298 | case 2: | |
299 | if (fepriv->lnb_drift == 0) break; | |
300 | ||
301 | fepriv->lnb_drift = -fepriv->lnb_drift; | |
302 | ready = 1; | |
303 | break; | |
304 | ||
305 | case 3: | |
306 | if (fepriv->lnb_drift == 0) break; | |
307 | if (!autoinversion) break; | |
308 | ||
309 | fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; | |
310 | fepriv->lnb_drift = -fepriv->lnb_drift; | |
311 | ready = 1; | |
312 | break; | |
313 | ||
314 | default: | |
315 | fepriv->auto_step++; | |
316 | fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ | |
317 | break; | |
318 | } | |
319 | ||
320 | if (!ready) fepriv->auto_sub_step++; | |
321 | } | |
322 | ||
323 | /* if this attempt would hit where we started, indicate a complete | |
324 | * iteration has occurred */ | |
325 | if ((fepriv->auto_step == fepriv->started_auto_step) && | |
326 | (fepriv->auto_sub_step == 0) && check_wrapped) { | |
327 | return 1; | |
328 | } | |
329 | ||
330 | dprintk("%s: drift:%i inversion:%i auto_step:%i " | |
331 | "auto_sub_step:%i started_auto_step:%i\n", | |
332 | __FUNCTION__, fepriv->lnb_drift, fepriv->inversion, | |
333 | fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step); | |
334 | ||
335 | /* set the frontend itself */ | |
336 | fepriv->parameters.frequency += fepriv->lnb_drift; | |
337 | if (autoinversion) | |
338 | fepriv->parameters.inversion = fepriv->inversion; | |
dea74869 PB |
339 | if (fe->ops.set_frontend) |
340 | fe->ops.set_frontend(fe, &fepriv->parameters); | |
1da177e4 LT |
341 | |
342 | fepriv->parameters.frequency = original_frequency; | |
343 | fepriv->parameters.inversion = original_inversion; | |
344 | ||
345 | fepriv->auto_sub_step++; | |
346 | return 0; | |
347 | } | |
348 | ||
36cb557a AQ |
349 | static void dvb_frontend_swzigzag(struct dvb_frontend *fe) |
350 | { | |
351 | fe_status_t s; | |
352 | struct dvb_frontend_private *fepriv = fe->frontend_priv; | |
353 | ||
354 | /* if we've got no parameters, just keep idling */ | |
355 | if (fepriv->state & FESTATE_IDLE) { | |
356 | fepriv->delay = 3*HZ; | |
357 | fepriv->quality = 0; | |
358 | return; | |
359 | } | |
360 | ||
361 | /* in SCAN mode, we just set the frontend when asked and leave it alone */ | |
362 | if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { | |
363 | if (fepriv->state & FESTATE_RETUNE) { | |
dea74869 PB |
364 | if (fe->ops.set_frontend) |
365 | fe->ops.set_frontend(fe, &fepriv->parameters); | |
36cb557a AQ |
366 | fepriv->state = FESTATE_TUNED; |
367 | } | |
368 | fepriv->delay = 3*HZ; | |
369 | fepriv->quality = 0; | |
370 | return; | |
371 | } | |
372 | ||
373 | /* get the frontend status */ | |
374 | if (fepriv->state & FESTATE_RETUNE) { | |
375 | s = 0; | |
376 | } else { | |
dea74869 PB |
377 | if (fe->ops.read_status) |
378 | fe->ops.read_status(fe, &s); | |
36cb557a AQ |
379 | if (s != fepriv->status) { |
380 | dvb_frontend_add_event(fe, s); | |
381 | fepriv->status = s; | |
382 | } | |
383 | } | |
384 | ||
385 | /* if we're not tuned, and we have a lock, move to the TUNED state */ | |
386 | if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { | |
387 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); | |
388 | fepriv->state = FESTATE_TUNED; | |
389 | ||
390 | /* if we're tuned, then we have determined the correct inversion */ | |
dea74869 | 391 | if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && |
36cb557a AQ |
392 | (fepriv->parameters.inversion == INVERSION_AUTO)) { |
393 | fepriv->parameters.inversion = fepriv->inversion; | |
394 | } | |
395 | return; | |
396 | } | |
397 | ||
398 | /* if we are tuned already, check we're still locked */ | |
399 | if (fepriv->state & FESTATE_TUNED) { | |
400 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); | |
401 | ||
402 | /* we're tuned, and the lock is still good... */ | |
403 | if (s & FE_HAS_LOCK) { | |
404 | return; | |
405 | } else { /* if we _WERE_ tuned, but now don't have a lock */ | |
406 | fepriv->state = FESTATE_ZIGZAG_FAST; | |
407 | fepriv->started_auto_step = fepriv->auto_step; | |
408 | fepriv->check_wrapped = 0; | |
409 | } | |
410 | } | |
411 | ||
412 | /* don't actually do anything if we're in the LOSTLOCK state, | |
413 | * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ | |
414 | if ((fepriv->state & FESTATE_LOSTLOCK) && | |
dea74869 | 415 | (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { |
36cb557a AQ |
416 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
417 | return; | |
418 | } | |
419 | ||
420 | /* don't do anything if we're in the DISEQC state, since this | |
421 | * might be someone with a motorized dish controlled by DISEQC. | |
422 | * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ | |
423 | if (fepriv->state & FESTATE_DISEQC) { | |
424 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); | |
425 | return; | |
426 | } | |
427 | ||
428 | /* if we're in the RETUNE state, set everything up for a brand | |
429 | * new scan, keeping the current inversion setting, as the next | |
430 | * tune is _very_ likely to require the same */ | |
431 | if (fepriv->state & FESTATE_RETUNE) { | |
432 | fepriv->lnb_drift = 0; | |
433 | fepriv->auto_step = 0; | |
434 | fepriv->auto_sub_step = 0; | |
435 | fepriv->started_auto_step = 0; | |
436 | fepriv->check_wrapped = 0; | |
437 | } | |
438 | ||
439 | /* fast zigzag. */ | |
440 | if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { | |
441 | fepriv->delay = fepriv->min_delay; | |
442 | ||
443 | /* peform a tune */ | |
444 | if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) { | |
445 | /* OK, if we've run out of trials at the fast speed. | |
446 | * Drop back to slow for the _next_ attempt */ | |
447 | fepriv->state = FESTATE_SEARCHING_SLOW; | |
448 | fepriv->started_auto_step = fepriv->auto_step; | |
449 | return; | |
450 | } | |
451 | fepriv->check_wrapped = 1; | |
452 | ||
453 | /* if we've just retuned, enter the ZIGZAG_FAST state. | |
454 | * This ensures we cannot return from an | |
455 | * FE_SET_FRONTEND ioctl before the first frontend tune | |
456 | * occurs */ | |
457 | if (fepriv->state & FESTATE_RETUNE) { | |
458 | fepriv->state = FESTATE_TUNING_FAST; | |
459 | } | |
460 | } | |
461 | ||
462 | /* slow zigzag */ | |
463 | if (fepriv->state & FESTATE_SEARCHING_SLOW) { | |
464 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); | |
465 | ||
466 | /* Note: don't bother checking for wrapping; we stay in this | |
467 | * state until we get a lock */ | |
468 | dvb_frontend_swzigzag_autotune(fe, 0); | |
469 | } | |
470 | } | |
471 | ||
1da177e4 LT |
472 | static int dvb_frontend_is_exiting(struct dvb_frontend *fe) |
473 | { | |
0c53c70f | 474 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
475 | |
476 | if (fepriv->exit) | |
477 | return 1; | |
478 | ||
479 | if (fepriv->dvbdev->writers == 1) | |
cc89c229 | 480 | if (time_after(jiffies, fepriv->release_jiffies + |
36cb557a | 481 | dvb_shutdown_timeout * HZ)) |
1da177e4 LT |
482 | return 1; |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
487 | static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) | |
488 | { | |
0c53c70f | 489 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
490 | |
491 | if (fepriv->wakeup) { | |
492 | fepriv->wakeup = 0; | |
493 | return 1; | |
494 | } | |
495 | return dvb_frontend_is_exiting(fe); | |
496 | } | |
497 | ||
498 | static void dvb_frontend_wakeup(struct dvb_frontend *fe) | |
499 | { | |
0c53c70f | 500 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
501 | |
502 | fepriv->wakeup = 1; | |
503 | wake_up_interruptible(&fepriv->wait_queue); | |
504 | } | |
505 | ||
1da177e4 LT |
506 | static int dvb_frontend_thread(void *data) |
507 | { | |
0c53c70f JS |
508 | struct dvb_frontend *fe = data; |
509 | struct dvb_frontend_private *fepriv = fe->frontend_priv; | |
1da177e4 LT |
510 | unsigned long timeout; |
511 | char name [15]; | |
1da177e4 | 512 | fe_status_t s; |
36cb557a | 513 | struct dvb_frontend_parameters *params; |
1da177e4 LT |
514 | |
515 | dprintk("%s\n", __FUNCTION__); | |
516 | ||
517 | snprintf (name, sizeof(name), "kdvb-fe-%i", fe->dvb->num); | |
518 | ||
afd1a0c9 MCC |
519 | lock_kernel(); |
520 | daemonize(name); | |
521 | sigfillset(¤t->blocked); | |
522 | unlock_kernel(); | |
1da177e4 | 523 | |
36cb557a AQ |
524 | fepriv->check_wrapped = 0; |
525 | fepriv->quality = 0; | |
526 | fepriv->delay = 3*HZ; | |
1da177e4 | 527 | fepriv->status = 0; |
1da177e4 | 528 | fepriv->wakeup = 0; |
86f40cc3 | 529 | fepriv->reinitialise = 1; |
1da177e4 LT |
530 | |
531 | while (1) { | |
532 | up(&fepriv->sem); /* is locked when we enter the thread... */ | |
533 | ||
534 | timeout = wait_event_interruptible_timeout(fepriv->wait_queue, | |
535 | dvb_frontend_should_wakeup(fe), | |
36cb557a | 536 | fepriv->delay); |
1da177e4 LT |
537 | if (0 != dvb_frontend_is_exiting(fe)) { |
538 | /* got signal or quitting */ | |
539 | break; | |
540 | } | |
541 | ||
3e1d1d28 | 542 | try_to_freeze(); |
1da177e4 LT |
543 | |
544 | if (down_interruptible(&fepriv->sem)) | |
545 | break; | |
546 | ||
86f40cc3 AQ |
547 | if (fepriv->reinitialise) { |
548 | dvb_frontend_init(fe); | |
64454016 | 549 | if (fepriv->tone != -1) { |
dea74869 | 550 | fe->ops.set_tone(fe, fepriv->tone); |
64454016 AQ |
551 | } |
552 | if (fepriv->voltage != -1) { | |
dea74869 | 553 | fe->ops.set_voltage(fe, fepriv->voltage); |
64454016 | 554 | } |
86f40cc3 AQ |
555 | fepriv->reinitialise = 0; |
556 | } | |
557 | ||
36cb557a | 558 | /* do an iteration of the tuning loop */ |
d772bd03 MA |
559 | if (fe->ops.get_frontend_algo) { |
560 | if (fe->ops.get_frontend_algo(fe) == FE_ALGO_HW) { | |
561 | /* have we been asked to retune? */ | |
562 | params = NULL; | |
563 | if (fepriv->state & FESTATE_RETUNE) { | |
564 | params = &fepriv->parameters; | |
565 | fepriv->state = FESTATE_TUNED; | |
566 | } | |
567 | ||
568 | fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s); | |
569 | if (s != fepriv->status) { | |
570 | dvb_frontend_add_event(fe, s); | |
571 | fepriv->status = s; | |
572 | } | |
573 | } else { | |
574 | dvb_frontend_swzigzag(fe); | |
36cb557a | 575 | } |
1da177e4 LT |
576 | } |
577 | } | |
578 | ||
579 | if (dvb_shutdown_timeout) { | |
580 | if (dvb_powerdown_on_sleep) | |
dea74869 PB |
581 | if (fe->ops.set_voltage) |
582 | fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); | |
583 | if (fe->ops.tuner_ops.sleep) { | |
584 | fe->ops.tuner_ops.sleep(fe); | |
585 | if (fe->ops.i2c_gate_ctrl) | |
586 | fe->ops.i2c_gate_ctrl(fe, 0); | |
7eef5dd6 | 587 | } |
dea74869 PB |
588 | if (fe->ops.sleep) |
589 | fe->ops.sleep(fe); | |
1da177e4 LT |
590 | } |
591 | ||
592 | fepriv->thread_pid = 0; | |
593 | mb(); | |
594 | ||
595 | dvb_frontend_wakeup(fe); | |
596 | return 0; | |
597 | } | |
598 | ||
599 | static void dvb_frontend_stop(struct dvb_frontend *fe) | |
600 | { | |
601 | unsigned long ret; | |
0c53c70f | 602 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
603 | |
604 | dprintk ("%s\n", __FUNCTION__); | |
605 | ||
606 | fepriv->exit = 1; | |
607 | mb(); | |
608 | ||
609 | if (!fepriv->thread_pid) | |
610 | return; | |
611 | ||
612 | /* check if the thread is really alive */ | |
613 | if (kill_proc(fepriv->thread_pid, 0, 1) == -ESRCH) { | |
614 | printk("dvb_frontend_stop: thread PID %d already died\n", | |
615 | fepriv->thread_pid); | |
616 | /* make sure the mutex was not held by the thread */ | |
617 | init_MUTEX (&fepriv->sem); | |
618 | return; | |
619 | } | |
620 | ||
621 | /* wake up the frontend thread, so it notices that fe->exit == 1 */ | |
622 | dvb_frontend_wakeup(fe); | |
623 | ||
624 | /* wait until the frontend thread has exited */ | |
625 | ret = wait_event_interruptible(fepriv->wait_queue,0 == fepriv->thread_pid); | |
626 | if (-ERESTARTSYS != ret) { | |
627 | fepriv->state = FESTATE_IDLE; | |
628 | return; | |
629 | } | |
630 | fepriv->state = FESTATE_IDLE; | |
631 | ||
632 | /* paranoia check in case a signal arrived */ | |
633 | if (fepriv->thread_pid) | |
634 | printk("dvb_frontend_stop: warning: thread PID %d won't exit\n", | |
635 | fepriv->thread_pid); | |
636 | } | |
637 | ||
83b75b04 N |
638 | s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) |
639 | { | |
640 | return ((curtime.tv_usec < lasttime.tv_usec) ? | |
641 | 1000000 - lasttime.tv_usec + curtime.tv_usec : | |
642 | curtime.tv_usec - lasttime.tv_usec); | |
643 | } | |
644 | EXPORT_SYMBOL(timeval_usec_diff); | |
645 | ||
646 | static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) | |
647 | { | |
648 | curtime->tv_usec += add_usec; | |
649 | if (curtime->tv_usec >= 1000000) { | |
650 | curtime->tv_usec -= 1000000; | |
651 | curtime->tv_sec++; | |
652 | } | |
653 | } | |
654 | ||
655 | /* | |
656 | * Sleep until gettimeofday() > waketime + add_usec | |
657 | * This needs to be as precise as possible, but as the delay is | |
658 | * usually between 2ms and 32ms, it is done using a scheduled msleep | |
659 | * followed by usleep (normally a busy-wait loop) for the remainder | |
660 | */ | |
661 | void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) | |
662 | { | |
663 | struct timeval lasttime; | |
664 | s32 delta, newdelta; | |
665 | ||
666 | timeval_usec_add(waketime, add_usec); | |
667 | ||
668 | do_gettimeofday(&lasttime); | |
669 | delta = timeval_usec_diff(lasttime, *waketime); | |
670 | if (delta > 2500) { | |
671 | msleep((delta - 1500) / 1000); | |
672 | do_gettimeofday(&lasttime); | |
673 | newdelta = timeval_usec_diff(lasttime, *waketime); | |
674 | delta = (newdelta > delta) ? 0 : newdelta; | |
675 | } | |
676 | if (delta > 0) | |
677 | udelay(delta); | |
678 | } | |
679 | EXPORT_SYMBOL(dvb_frontend_sleep_until); | |
680 | ||
1da177e4 LT |
681 | static int dvb_frontend_start(struct dvb_frontend *fe) |
682 | { | |
683 | int ret; | |
0c53c70f | 684 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
685 | |
686 | dprintk ("%s\n", __FUNCTION__); | |
687 | ||
688 | if (fepriv->thread_pid) { | |
689 | if (!fepriv->exit) | |
690 | return 0; | |
691 | else | |
692 | dvb_frontend_stop (fe); | |
693 | } | |
694 | ||
695 | if (signal_pending(current)) | |
696 | return -EINTR; | |
697 | if (down_interruptible (&fepriv->sem)) | |
698 | return -EINTR; | |
699 | ||
700 | fepriv->state = FESTATE_IDLE; | |
701 | fepriv->exit = 0; | |
702 | fepriv->thread_pid = 0; | |
703 | mb(); | |
704 | ||
705 | ret = kernel_thread (dvb_frontend_thread, fe, 0); | |
706 | ||
707 | if (ret < 0) { | |
708 | printk("dvb_frontend_start: failed to start kernel_thread (%d)\n", ret); | |
709 | up(&fepriv->sem); | |
710 | return ret; | |
711 | } | |
712 | fepriv->thread_pid = ret; | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
717 | static int dvb_frontend_ioctl(struct inode *inode, struct file *file, | |
718 | unsigned int cmd, void *parg) | |
719 | { | |
720 | struct dvb_device *dvbdev = file->private_data; | |
721 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 722 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
723 | int err = -EOPNOTSUPP; |
724 | ||
725 | dprintk ("%s\n", __FUNCTION__); | |
726 | ||
727 | if (!fe || fepriv->exit) | |
728 | return -ENODEV; | |
729 | ||
730 | if ((file->f_flags & O_ACCMODE) == O_RDONLY && | |
731 | (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || | |
732 | cmd == FE_DISEQC_RECV_SLAVE_REPLY)) | |
733 | return -EPERM; | |
734 | ||
735 | if (down_interruptible (&fepriv->sem)) | |
736 | return -ERESTARTSYS; | |
737 | ||
738 | switch (cmd) { | |
739 | case FE_GET_INFO: { | |
0c53c70f | 740 | struct dvb_frontend_info* info = parg; |
dea74869 | 741 | memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); |
1da177e4 LT |
742 | |
743 | /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't | |
744 | * do it, it is done for it. */ | |
745 | info->caps |= FE_CAN_INVERSION_AUTO; | |
746 | err = 0; | |
747 | break; | |
748 | } | |
749 | ||
6757ccc5 PB |
750 | case FE_READ_STATUS: { |
751 | fe_status_t* status = parg; | |
752 | ||
753 | /* if retune was requested but hasn't occured yet, prevent | |
754 | * that user get signal state from previous tuning */ | |
755 | if(fepriv->state == FESTATE_RETUNE) { | |
756 | err=0; | |
757 | *status = 0; | |
758 | break; | |
759 | } | |
760 | ||
dea74869 PB |
761 | if (fe->ops.read_status) |
762 | err = fe->ops.read_status(fe, status); | |
1da177e4 | 763 | break; |
6757ccc5 | 764 | } |
1da177e4 | 765 | case FE_READ_BER: |
dea74869 PB |
766 | if (fe->ops.read_ber) |
767 | err = fe->ops.read_ber(fe, (__u32*) parg); | |
1da177e4 LT |
768 | break; |
769 | ||
770 | case FE_READ_SIGNAL_STRENGTH: | |
dea74869 PB |
771 | if (fe->ops.read_signal_strength) |
772 | err = fe->ops.read_signal_strength(fe, (__u16*) parg); | |
1da177e4 LT |
773 | break; |
774 | ||
775 | case FE_READ_SNR: | |
dea74869 PB |
776 | if (fe->ops.read_snr) |
777 | err = fe->ops.read_snr(fe, (__u16*) parg); | |
1da177e4 LT |
778 | break; |
779 | ||
780 | case FE_READ_UNCORRECTED_BLOCKS: | |
dea74869 PB |
781 | if (fe->ops.read_ucblocks) |
782 | err = fe->ops.read_ucblocks(fe, (__u32*) parg); | |
1da177e4 LT |
783 | break; |
784 | ||
785 | ||
786 | case FE_DISEQC_RESET_OVERLOAD: | |
dea74869 PB |
787 | if (fe->ops.diseqc_reset_overload) { |
788 | err = fe->ops.diseqc_reset_overload(fe); | |
1da177e4 LT |
789 | fepriv->state = FESTATE_DISEQC; |
790 | fepriv->status = 0; | |
791 | } | |
792 | break; | |
793 | ||
794 | case FE_DISEQC_SEND_MASTER_CMD: | |
dea74869 PB |
795 | if (fe->ops.diseqc_send_master_cmd) { |
796 | err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); | |
1da177e4 LT |
797 | fepriv->state = FESTATE_DISEQC; |
798 | fepriv->status = 0; | |
799 | } | |
800 | break; | |
801 | ||
802 | case FE_DISEQC_SEND_BURST: | |
dea74869 PB |
803 | if (fe->ops.diseqc_send_burst) { |
804 | err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); | |
1da177e4 LT |
805 | fepriv->state = FESTATE_DISEQC; |
806 | fepriv->status = 0; | |
807 | } | |
808 | break; | |
809 | ||
810 | case FE_SET_TONE: | |
dea74869 PB |
811 | if (fe->ops.set_tone) { |
812 | err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); | |
64454016 | 813 | fepriv->tone = (fe_sec_tone_mode_t) parg; |
1da177e4 LT |
814 | fepriv->state = FESTATE_DISEQC; |
815 | fepriv->status = 0; | |
816 | } | |
817 | break; | |
818 | ||
819 | case FE_SET_VOLTAGE: | |
dea74869 PB |
820 | if (fe->ops.set_voltage) { |
821 | err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); | |
64454016 | 822 | fepriv->voltage = (fe_sec_voltage_t) parg; |
1da177e4 LT |
823 | fepriv->state = FESTATE_DISEQC; |
824 | fepriv->status = 0; | |
825 | } | |
826 | break; | |
827 | ||
828 | case FE_DISHNETWORK_SEND_LEGACY_CMD: | |
dea74869 PB |
829 | if (fe->ops.dishnetwork_send_legacy_command) { |
830 | err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); | |
1da177e4 LT |
831 | fepriv->state = FESTATE_DISEQC; |
832 | fepriv->status = 0; | |
dea74869 | 833 | } else if (fe->ops.set_voltage) { |
83b75b04 N |
834 | /* |
835 | * NOTE: This is a fallback condition. Some frontends | |
836 | * (stv0299 for instance) take longer than 8msec to | |
837 | * respond to a set_voltage command. Those switches | |
838 | * need custom routines to switch properly. For all | |
839 | * other frontends, the following shoule work ok. | |
840 | * Dish network legacy switches (as used by Dish500) | |
841 | * are controlled by sending 9-bit command words | |
842 | * spaced 8msec apart. | |
843 | * the actual command word is switch/port dependant | |
844 | * so it is up to the userspace application to send | |
845 | * the right command. | |
846 | * The command must always start with a '0' after | |
847 | * initialization, so parg is 8 bits and does not | |
848 | * include the initialization or start bit | |
849 | */ | |
400b7083 | 850 | unsigned long cmd = ((unsigned long) parg) << 1; |
83b75b04 N |
851 | struct timeval nexttime; |
852 | struct timeval tv[10]; | |
853 | int i; | |
854 | u8 last = 1; | |
855 | if (dvb_frontend_debug) | |
400b7083 | 856 | printk("%s switch command: 0x%04lx\n", __FUNCTION__, cmd); |
83b75b04 N |
857 | do_gettimeofday(&nexttime); |
858 | if (dvb_frontend_debug) | |
859 | memcpy(&tv[0], &nexttime, sizeof(struct timeval)); | |
860 | /* before sending a command, initialize by sending | |
861 | * a 32ms 18V to the switch | |
862 | */ | |
dea74869 | 863 | fe->ops.set_voltage(fe, SEC_VOLTAGE_18); |
83b75b04 N |
864 | dvb_frontend_sleep_until(&nexttime, 32000); |
865 | ||
866 | for (i = 0; i < 9; i++) { | |
867 | if (dvb_frontend_debug) | |
868 | do_gettimeofday(&tv[i + 1]); | |
869 | if ((cmd & 0x01) != last) { | |
870 | /* set voltage to (last ? 13V : 18V) */ | |
dea74869 | 871 | fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); |
83b75b04 N |
872 | last = (last) ? 0 : 1; |
873 | } | |
874 | cmd = cmd >> 1; | |
875 | if (i != 8) | |
876 | dvb_frontend_sleep_until(&nexttime, 8000); | |
877 | } | |
878 | if (dvb_frontend_debug) { | |
879 | printk("%s(%d): switch delay (should be 32k followed by all 8k\n", | |
880 | __FUNCTION__, fe->dvb->num); | |
881 | for (i = 1; i < 10; i++) | |
882 | printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); | |
883 | } | |
884 | err = 0; | |
885 | fepriv->state = FESTATE_DISEQC; | |
886 | fepriv->status = 0; | |
1da177e4 LT |
887 | } |
888 | break; | |
889 | ||
890 | case FE_DISEQC_RECV_SLAVE_REPLY: | |
dea74869 PB |
891 | if (fe->ops.diseqc_recv_slave_reply) |
892 | err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); | |
1da177e4 LT |
893 | break; |
894 | ||
895 | case FE_ENABLE_HIGH_LNB_VOLTAGE: | |
dea74869 PB |
896 | if (fe->ops.enable_high_lnb_voltage) |
897 | err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); | |
1da177e4 LT |
898 | break; |
899 | ||
900 | case FE_SET_FRONTEND: { | |
901 | struct dvb_frontend_tune_settings fetunesettings; | |
902 | ||
903 | memcpy (&fepriv->parameters, parg, | |
904 | sizeof (struct dvb_frontend_parameters)); | |
905 | ||
906 | memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); | |
907 | memcpy(&fetunesettings.parameters, parg, | |
908 | sizeof (struct dvb_frontend_parameters)); | |
909 | ||
910 | /* force auto frequency inversion if requested */ | |
911 | if (dvb_force_auto_inversion) { | |
912 | fepriv->parameters.inversion = INVERSION_AUTO; | |
913 | fetunesettings.parameters.inversion = INVERSION_AUTO; | |
914 | } | |
dea74869 | 915 | if (fe->ops.info.type == FE_OFDM) { |
1da177e4 LT |
916 | /* without hierachical coding code_rate_LP is irrelevant, |
917 | * so we tolerate the otherwise invalid FEC_NONE setting */ | |
918 | if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE && | |
919 | fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE) | |
920 | fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO; | |
921 | } | |
922 | ||
923 | /* get frontend-specific tuning settings */ | |
dea74869 | 924 | if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { |
1da177e4 LT |
925 | fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; |
926 | fepriv->max_drift = fetunesettings.max_drift; | |
927 | fepriv->step_size = fetunesettings.step_size; | |
928 | } else { | |
929 | /* default values */ | |
dea74869 | 930 | switch(fe->ops.info.type) { |
1da177e4 LT |
931 | case FE_QPSK: |
932 | fepriv->min_delay = HZ/20; | |
933 | fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000; | |
934 | fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000; | |
935 | break; | |
936 | ||
937 | case FE_QAM: | |
938 | fepriv->min_delay = HZ/20; | |
939 | fepriv->step_size = 0; /* no zigzag */ | |
940 | fepriv->max_drift = 0; | |
941 | break; | |
942 | ||
943 | case FE_OFDM: | |
944 | fepriv->min_delay = HZ/20; | |
dea74869 PB |
945 | fepriv->step_size = fe->ops.info.frequency_stepsize * 2; |
946 | fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; | |
1da177e4 LT |
947 | break; |
948 | case FE_ATSC: | |
4821fb1d MA |
949 | fepriv->min_delay = HZ/20; |
950 | fepriv->step_size = 0; | |
951 | fepriv->max_drift = 0; | |
1da177e4 LT |
952 | break; |
953 | } | |
954 | } | |
955 | if (dvb_override_tune_delay > 0) | |
956 | fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; | |
957 | ||
958 | fepriv->state = FESTATE_RETUNE; | |
959 | dvb_frontend_wakeup(fe); | |
960 | dvb_frontend_add_event(fe, 0); | |
961 | fepriv->status = 0; | |
962 | err = 0; | |
963 | break; | |
964 | } | |
965 | ||
966 | case FE_GET_EVENT: | |
967 | err = dvb_frontend_get_event (fe, parg, file->f_flags); | |
968 | break; | |
969 | ||
970 | case FE_GET_FRONTEND: | |
dea74869 | 971 | if (fe->ops.get_frontend) { |
1da177e4 | 972 | memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters)); |
dea74869 | 973 | err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg); |
1da177e4 LT |
974 | } |
975 | break; | |
36cb557a AQ |
976 | |
977 | case FE_SET_FRONTEND_TUNE_MODE: | |
e18828e4 | 978 | fepriv->tune_mode_flags = (unsigned long) parg; |
36cb557a | 979 | break; |
1da177e4 LT |
980 | }; |
981 | ||
982 | up (&fepriv->sem); | |
983 | return err; | |
984 | } | |
985 | ||
986 | static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) | |
987 | { | |
988 | struct dvb_device *dvbdev = file->private_data; | |
989 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 990 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
991 | |
992 | dprintk ("%s\n", __FUNCTION__); | |
993 | ||
994 | poll_wait (file, &fepriv->events.wait_queue, wait); | |
995 | ||
996 | if (fepriv->events.eventw != fepriv->events.eventr) | |
997 | return (POLLIN | POLLRDNORM | POLLPRI); | |
998 | ||
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | static int dvb_frontend_open(struct inode *inode, struct file *file) | |
1003 | { | |
1004 | struct dvb_device *dvbdev = file->private_data; | |
1005 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 1006 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
1007 | int ret; |
1008 | ||
1009 | dprintk ("%s\n", __FUNCTION__); | |
1010 | ||
1011 | if ((ret = dvb_generic_open (inode, file)) < 0) | |
1012 | return ret; | |
1013 | ||
1014 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) { | |
1015 | ret = dvb_frontend_start (fe); | |
1016 | if (ret) | |
1017 | dvb_generic_release (inode, file); | |
1018 | ||
1019 | /* empty event queue */ | |
1020 | fepriv->events.eventr = fepriv->events.eventw = 0; | |
36cb557a AQ |
1021 | |
1022 | /* normal tune mode when opened R/W */ | |
1023 | fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; | |
64454016 AQ |
1024 | fepriv->tone = -1; |
1025 | fepriv->voltage = -1; | |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | return ret; | |
1029 | } | |
1030 | ||
1031 | static int dvb_frontend_release(struct inode *inode, struct file *file) | |
1032 | { | |
1033 | struct dvb_device *dvbdev = file->private_data; | |
1034 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 1035 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
1036 | |
1037 | dprintk ("%s\n", __FUNCTION__); | |
1038 | ||
1039 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) | |
1040 | fepriv->release_jiffies = jiffies; | |
1041 | ||
1042 | return dvb_generic_release (inode, file); | |
1043 | } | |
1044 | ||
1045 | static struct file_operations dvb_frontend_fops = { | |
1046 | .owner = THIS_MODULE, | |
1047 | .ioctl = dvb_generic_ioctl, | |
1048 | .poll = dvb_frontend_poll, | |
1049 | .open = dvb_frontend_open, | |
1050 | .release = dvb_frontend_release | |
1051 | }; | |
1052 | ||
1053 | int dvb_register_frontend(struct dvb_adapter* dvb, | |
1054 | struct dvb_frontend* fe) | |
1055 | { | |
1056 | struct dvb_frontend_private *fepriv; | |
1057 | static const struct dvb_device dvbdev_template = { | |
1058 | .users = ~0, | |
1059 | .writers = 1, | |
1060 | .readers = (~0)-1, | |
1061 | .fops = &dvb_frontend_fops, | |
1062 | .kernel_ioctl = dvb_frontend_ioctl | |
1063 | }; | |
1064 | ||
1065 | dprintk ("%s\n", __FUNCTION__); | |
1066 | ||
3593cab5 | 1067 | if (mutex_lock_interruptible(&frontend_mutex)) |
1da177e4 LT |
1068 | return -ERESTARTSYS; |
1069 | ||
7408187d | 1070 | fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); |
1da177e4 | 1071 | if (fe->frontend_priv == NULL) { |
3593cab5 | 1072 | mutex_unlock(&frontend_mutex); |
1da177e4 LT |
1073 | return -ENOMEM; |
1074 | } | |
0c53c70f | 1075 | fepriv = fe->frontend_priv; |
1da177e4 LT |
1076 | |
1077 | init_MUTEX (&fepriv->sem); | |
1078 | init_waitqueue_head (&fepriv->wait_queue); | |
1079 | init_waitqueue_head (&fepriv->events.wait_queue); | |
1080 | init_MUTEX (&fepriv->events.sem); | |
1081 | fe->dvb = dvb; | |
1082 | fepriv->inversion = INVERSION_OFF; | |
1083 | ||
1084 | printk ("DVB: registering frontend %i (%s)...\n", | |
1085 | fe->dvb->num, | |
dea74869 | 1086 | fe->ops.info.name); |
1da177e4 LT |
1087 | |
1088 | dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, | |
1089 | fe, DVB_DEVICE_FRONTEND); | |
1090 | ||
3593cab5 | 1091 | mutex_unlock(&frontend_mutex); |
1da177e4 LT |
1092 | return 0; |
1093 | } | |
1094 | EXPORT_SYMBOL(dvb_register_frontend); | |
1095 | ||
1096 | int dvb_unregister_frontend(struct dvb_frontend* fe) | |
1097 | { | |
0c53c70f | 1098 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
1099 | dprintk ("%s\n", __FUNCTION__); |
1100 | ||
3593cab5 | 1101 | mutex_lock(&frontend_mutex); |
1da177e4 LT |
1102 | dvb_unregister_device (fepriv->dvbdev); |
1103 | dvb_frontend_stop (fe); | |
dea74869 PB |
1104 | if (fe->ops.tuner_ops.release) { |
1105 | fe->ops.tuner_ops.release(fe); | |
1106 | if (fe->ops.i2c_gate_ctrl) | |
1107 | fe->ops.i2c_gate_ctrl(fe, 0); | |
7eef5dd6 | 1108 | } |
dea74869 PB |
1109 | if (fe->ops.release) |
1110 | fe->ops.release(fe); | |
1da177e4 | 1111 | else |
dea74869 | 1112 | printk("dvb_frontend: Demodulator (%s) does not have a release callback!\n", fe->ops.info.name); |
1da177e4 LT |
1113 | /* fe is invalid now */ |
1114 | kfree(fepriv); | |
3593cab5 | 1115 | mutex_unlock(&frontend_mutex); |
1da177e4 LT |
1116 | return 0; |
1117 | } | |
1118 | EXPORT_SYMBOL(dvb_unregister_frontend); |