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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> | |
1da177e4 | 35 | #include <linux/list.h> |
7dfb7103 | 36 | #include <linux/freezer.h> |
cc89c229 | 37 | #include <linux/jiffies.h> |
8eec1429 | 38 | #include <linux/kthread.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; | |
849be2cd | 45 | static int dvb_shutdown_timeout; |
1da177e4 LT |
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; | |
8eec1429 | 103 | struct task_struct *thread; |
1da177e4 | 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 | ||
03b76123 | 140 | if (mutex_lock_interruptible (&events->mtx)) |
1da177e4 LT |
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 | ||
03b76123 | 161 | mutex_unlock(&events->mtx); |
1da177e4 LT |
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 | ||
03b76123 | 199 | if (mutex_lock_interruptible (&events->mtx)) |
1da177e4 LT |
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 | ||
03b76123 | 207 | mutex_unlock(&events->mtx); |
1da177e4 LT |
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 | { | |
30d9464c | 351 | fe_status_t s = 0; |
36cb557a AQ |
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 | 510 | unsigned long timeout; |
1da177e4 | 511 | fe_status_t s; |
36cb557a | 512 | struct dvb_frontend_parameters *params; |
1da177e4 LT |
513 | |
514 | dprintk("%s\n", __FUNCTION__); | |
515 | ||
36cb557a AQ |
516 | fepriv->check_wrapped = 0; |
517 | fepriv->quality = 0; | |
518 | fepriv->delay = 3*HZ; | |
1da177e4 | 519 | fepriv->status = 0; |
1da177e4 | 520 | fepriv->wakeup = 0; |
04c56d0e AQ |
521 | fepriv->reinitialise = 0; |
522 | ||
523 | dvb_frontend_init(fe); | |
1da177e4 | 524 | |
83144186 | 525 | set_freezable(); |
1da177e4 LT |
526 | while (1) { |
527 | up(&fepriv->sem); /* is locked when we enter the thread... */ | |
6591691b | 528 | restart: |
1da177e4 | 529 | timeout = wait_event_interruptible_timeout(fepriv->wait_queue, |
8eec1429 HP |
530 | dvb_frontend_should_wakeup(fe) || kthread_should_stop(), |
531 | fepriv->delay); | |
532 | ||
533 | if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { | |
1da177e4 LT |
534 | /* got signal or quitting */ |
535 | break; | |
536 | } | |
537 | ||
8eec1429 | 538 | if (try_to_freeze()) |
6591691b | 539 | goto restart; |
1da177e4 LT |
540 | |
541 | if (down_interruptible(&fepriv->sem)) | |
542 | break; | |
543 | ||
86f40cc3 AQ |
544 | if (fepriv->reinitialise) { |
545 | dvb_frontend_init(fe); | |
64454016 | 546 | if (fepriv->tone != -1) { |
dea74869 | 547 | fe->ops.set_tone(fe, fepriv->tone); |
64454016 AQ |
548 | } |
549 | if (fepriv->voltage != -1) { | |
dea74869 | 550 | fe->ops.set_voltage(fe, fepriv->voltage); |
64454016 | 551 | } |
86f40cc3 AQ |
552 | fepriv->reinitialise = 0; |
553 | } | |
554 | ||
36cb557a | 555 | /* do an iteration of the tuning loop */ |
d772bd03 MA |
556 | if (fe->ops.get_frontend_algo) { |
557 | if (fe->ops.get_frontend_algo(fe) == FE_ALGO_HW) { | |
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 | } | |
564 | ||
565 | fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s); | |
566 | if (s != fepriv->status) { | |
567 | dvb_frontend_add_event(fe, s); | |
568 | fepriv->status = s; | |
569 | } | |
70d90635 MA |
570 | } else |
571 | dvb_frontend_swzigzag(fe); | |
4a4edcca MA |
572 | } else |
573 | dvb_frontend_swzigzag(fe); | |
1da177e4 LT |
574 | } |
575 | ||
576 | if (dvb_shutdown_timeout) { | |
577 | if (dvb_powerdown_on_sleep) | |
dea74869 PB |
578 | if (fe->ops.set_voltage) |
579 | fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); | |
580 | if (fe->ops.tuner_ops.sleep) { | |
581 | fe->ops.tuner_ops.sleep(fe); | |
582 | if (fe->ops.i2c_gate_ctrl) | |
583 | fe->ops.i2c_gate_ctrl(fe, 0); | |
7eef5dd6 | 584 | } |
dea74869 PB |
585 | if (fe->ops.sleep) |
586 | fe->ops.sleep(fe); | |
1da177e4 LT |
587 | } |
588 | ||
8eec1429 | 589 | fepriv->thread = NULL; |
1da177e4 LT |
590 | mb(); |
591 | ||
592 | dvb_frontend_wakeup(fe); | |
593 | return 0; | |
594 | } | |
595 | ||
596 | static void dvb_frontend_stop(struct dvb_frontend *fe) | |
597 | { | |
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 | ||
8eec1429 | 605 | if (!fepriv->thread) |
1da177e4 LT |
606 | return; |
607 | ||
8eec1429 | 608 | kthread_stop(fepriv->thread); |
ca5be9cd | 609 | |
8eec1429 | 610 | init_MUTEX (&fepriv->sem); |
1da177e4 LT |
611 | fepriv->state = FESTATE_IDLE; |
612 | ||
613 | /* paranoia check in case a signal arrived */ | |
8eec1429 HP |
614 | if (fepriv->thread) |
615 | printk("dvb_frontend_stop: warning: thread %p won't exit\n", | |
616 | fepriv->thread); | |
1da177e4 LT |
617 | } |
618 | ||
83b75b04 N |
619 | s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) |
620 | { | |
621 | return ((curtime.tv_usec < lasttime.tv_usec) ? | |
622 | 1000000 - lasttime.tv_usec + curtime.tv_usec : | |
623 | curtime.tv_usec - lasttime.tv_usec); | |
624 | } | |
625 | EXPORT_SYMBOL(timeval_usec_diff); | |
626 | ||
627 | static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) | |
628 | { | |
629 | curtime->tv_usec += add_usec; | |
630 | if (curtime->tv_usec >= 1000000) { | |
631 | curtime->tv_usec -= 1000000; | |
632 | curtime->tv_sec++; | |
633 | } | |
634 | } | |
635 | ||
636 | /* | |
637 | * Sleep until gettimeofday() > waketime + add_usec | |
638 | * This needs to be as precise as possible, but as the delay is | |
639 | * usually between 2ms and 32ms, it is done using a scheduled msleep | |
640 | * followed by usleep (normally a busy-wait loop) for the remainder | |
641 | */ | |
642 | void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) | |
643 | { | |
644 | struct timeval lasttime; | |
645 | s32 delta, newdelta; | |
646 | ||
647 | timeval_usec_add(waketime, add_usec); | |
648 | ||
649 | do_gettimeofday(&lasttime); | |
650 | delta = timeval_usec_diff(lasttime, *waketime); | |
651 | if (delta > 2500) { | |
652 | msleep((delta - 1500) / 1000); | |
653 | do_gettimeofday(&lasttime); | |
654 | newdelta = timeval_usec_diff(lasttime, *waketime); | |
655 | delta = (newdelta > delta) ? 0 : newdelta; | |
656 | } | |
657 | if (delta > 0) | |
658 | udelay(delta); | |
659 | } | |
660 | EXPORT_SYMBOL(dvb_frontend_sleep_until); | |
661 | ||
1da177e4 LT |
662 | static int dvb_frontend_start(struct dvb_frontend *fe) |
663 | { | |
664 | int ret; | |
0c53c70f | 665 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
8eec1429 | 666 | struct task_struct *fe_thread; |
1da177e4 LT |
667 | |
668 | dprintk ("%s\n", __FUNCTION__); | |
669 | ||
8eec1429 | 670 | if (fepriv->thread) { |
1da177e4 LT |
671 | if (!fepriv->exit) |
672 | return 0; | |
673 | else | |
674 | dvb_frontend_stop (fe); | |
675 | } | |
676 | ||
677 | if (signal_pending(current)) | |
678 | return -EINTR; | |
679 | if (down_interruptible (&fepriv->sem)) | |
680 | return -EINTR; | |
681 | ||
682 | fepriv->state = FESTATE_IDLE; | |
683 | fepriv->exit = 0; | |
8eec1429 | 684 | fepriv->thread = NULL; |
1da177e4 LT |
685 | mb(); |
686 | ||
8eec1429 HP |
687 | fe_thread = kthread_run(dvb_frontend_thread, fe, |
688 | "kdvb-fe-%i", fe->dvb->num); | |
689 | if (IS_ERR(fe_thread)) { | |
690 | ret = PTR_ERR(fe_thread); | |
691 | printk("dvb_frontend_start: failed to start kthread (%d)\n", ret); | |
1da177e4 LT |
692 | up(&fepriv->sem); |
693 | return ret; | |
694 | } | |
8eec1429 | 695 | fepriv->thread = fe_thread; |
1da177e4 LT |
696 | return 0; |
697 | } | |
698 | ||
c471b331 OE |
699 | static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe, |
700 | u32 *freq_min, u32 *freq_max) | |
701 | { | |
702 | *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min); | |
703 | ||
704 | if (fe->ops.info.frequency_max == 0) | |
705 | *freq_max = fe->ops.tuner_ops.info.frequency_max; | |
706 | else if (fe->ops.tuner_ops.info.frequency_max == 0) | |
707 | *freq_max = fe->ops.info.frequency_max; | |
708 | else | |
709 | *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max); | |
710 | ||
711 | if (*freq_min == 0 || *freq_max == 0) | |
712 | printk(KERN_WARNING "DVB: frontend %u frequency limits undefined - fix the driver\n", | |
713 | fe->dvb->num); | |
714 | } | |
715 | ||
1fab46f0 OE |
716 | static int dvb_frontend_check_parameters(struct dvb_frontend *fe, |
717 | struct dvb_frontend_parameters *parms) | |
718 | { | |
c471b331 OE |
719 | u32 freq_min; |
720 | u32 freq_max; | |
721 | ||
1fab46f0 | 722 | /* range check: frequency */ |
c471b331 OE |
723 | dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max); |
724 | if ((freq_min && parms->frequency < freq_min) || | |
725 | (freq_max && parms->frequency > freq_max)) { | |
1fab46f0 | 726 | printk(KERN_WARNING "DVB: frontend %u frequency %u out of range (%u..%u)\n", |
c471b331 | 727 | fe->dvb->num, parms->frequency, freq_min, freq_max); |
1fab46f0 OE |
728 | return -EINVAL; |
729 | } | |
730 | ||
731 | /* range check: symbol rate */ | |
732 | if (fe->ops.info.type == FE_QPSK) { | |
733 | if ((fe->ops.info.symbol_rate_min && | |
734 | parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) || | |
735 | (fe->ops.info.symbol_rate_max && | |
736 | parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) { | |
737 | printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n", | |
738 | fe->dvb->num, parms->u.qpsk.symbol_rate, | |
739 | fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max); | |
740 | return -EINVAL; | |
741 | } | |
742 | ||
743 | } else if (fe->ops.info.type == FE_QAM) { | |
744 | if ((fe->ops.info.symbol_rate_min && | |
745 | parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) || | |
746 | (fe->ops.info.symbol_rate_max && | |
747 | parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) { | |
748 | printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n", | |
749 | fe->dvb->num, parms->u.qam.symbol_rate, | |
750 | fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max); | |
751 | return -EINVAL; | |
752 | } | |
753 | } | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
1da177e4 LT |
758 | static int dvb_frontend_ioctl(struct inode *inode, struct file *file, |
759 | unsigned int cmd, void *parg) | |
760 | { | |
761 | struct dvb_device *dvbdev = file->private_data; | |
762 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 763 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
764 | int err = -EOPNOTSUPP; |
765 | ||
766 | dprintk ("%s\n", __FUNCTION__); | |
767 | ||
813ce47c | 768 | if (fepriv->exit) |
1da177e4 LT |
769 | return -ENODEV; |
770 | ||
771 | if ((file->f_flags & O_ACCMODE) == O_RDONLY && | |
772 | (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || | |
773 | cmd == FE_DISEQC_RECV_SLAVE_REPLY)) | |
774 | return -EPERM; | |
775 | ||
776 | if (down_interruptible (&fepriv->sem)) | |
777 | return -ERESTARTSYS; | |
778 | ||
779 | switch (cmd) { | |
780 | case FE_GET_INFO: { | |
0c53c70f | 781 | struct dvb_frontend_info* info = parg; |
dea74869 | 782 | memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); |
c471b331 | 783 | dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max); |
1da177e4 LT |
784 | |
785 | /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't | |
786 | * do it, it is done for it. */ | |
787 | info->caps |= FE_CAN_INVERSION_AUTO; | |
788 | err = 0; | |
789 | break; | |
790 | } | |
791 | ||
6757ccc5 PB |
792 | case FE_READ_STATUS: { |
793 | fe_status_t* status = parg; | |
794 | ||
795 | /* if retune was requested but hasn't occured yet, prevent | |
796 | * that user get signal state from previous tuning */ | |
797 | if(fepriv->state == FESTATE_RETUNE) { | |
798 | err=0; | |
799 | *status = 0; | |
800 | break; | |
801 | } | |
802 | ||
dea74869 PB |
803 | if (fe->ops.read_status) |
804 | err = fe->ops.read_status(fe, status); | |
1da177e4 | 805 | break; |
6757ccc5 | 806 | } |
1da177e4 | 807 | case FE_READ_BER: |
dea74869 PB |
808 | if (fe->ops.read_ber) |
809 | err = fe->ops.read_ber(fe, (__u32*) parg); | |
1da177e4 LT |
810 | break; |
811 | ||
812 | case FE_READ_SIGNAL_STRENGTH: | |
dea74869 PB |
813 | if (fe->ops.read_signal_strength) |
814 | err = fe->ops.read_signal_strength(fe, (__u16*) parg); | |
1da177e4 LT |
815 | break; |
816 | ||
817 | case FE_READ_SNR: | |
dea74869 PB |
818 | if (fe->ops.read_snr) |
819 | err = fe->ops.read_snr(fe, (__u16*) parg); | |
1da177e4 LT |
820 | break; |
821 | ||
822 | case FE_READ_UNCORRECTED_BLOCKS: | |
dea74869 PB |
823 | if (fe->ops.read_ucblocks) |
824 | err = fe->ops.read_ucblocks(fe, (__u32*) parg); | |
1da177e4 LT |
825 | break; |
826 | ||
827 | ||
828 | case FE_DISEQC_RESET_OVERLOAD: | |
dea74869 PB |
829 | if (fe->ops.diseqc_reset_overload) { |
830 | err = fe->ops.diseqc_reset_overload(fe); | |
1da177e4 LT |
831 | fepriv->state = FESTATE_DISEQC; |
832 | fepriv->status = 0; | |
833 | } | |
834 | break; | |
835 | ||
836 | case FE_DISEQC_SEND_MASTER_CMD: | |
dea74869 PB |
837 | if (fe->ops.diseqc_send_master_cmd) { |
838 | err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); | |
1da177e4 LT |
839 | fepriv->state = FESTATE_DISEQC; |
840 | fepriv->status = 0; | |
841 | } | |
842 | break; | |
843 | ||
844 | case FE_DISEQC_SEND_BURST: | |
dea74869 PB |
845 | if (fe->ops.diseqc_send_burst) { |
846 | err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); | |
1da177e4 LT |
847 | fepriv->state = FESTATE_DISEQC; |
848 | fepriv->status = 0; | |
849 | } | |
850 | break; | |
851 | ||
852 | case FE_SET_TONE: | |
dea74869 PB |
853 | if (fe->ops.set_tone) { |
854 | err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); | |
64454016 | 855 | fepriv->tone = (fe_sec_tone_mode_t) parg; |
1da177e4 LT |
856 | fepriv->state = FESTATE_DISEQC; |
857 | fepriv->status = 0; | |
858 | } | |
859 | break; | |
860 | ||
861 | case FE_SET_VOLTAGE: | |
dea74869 PB |
862 | if (fe->ops.set_voltage) { |
863 | err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); | |
64454016 | 864 | fepriv->voltage = (fe_sec_voltage_t) parg; |
1da177e4 LT |
865 | fepriv->state = FESTATE_DISEQC; |
866 | fepriv->status = 0; | |
867 | } | |
868 | break; | |
869 | ||
870 | case FE_DISHNETWORK_SEND_LEGACY_CMD: | |
dea74869 PB |
871 | if (fe->ops.dishnetwork_send_legacy_command) { |
872 | err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); | |
1da177e4 LT |
873 | fepriv->state = FESTATE_DISEQC; |
874 | fepriv->status = 0; | |
dea74869 | 875 | } else if (fe->ops.set_voltage) { |
83b75b04 N |
876 | /* |
877 | * NOTE: This is a fallback condition. Some frontends | |
878 | * (stv0299 for instance) take longer than 8msec to | |
879 | * respond to a set_voltage command. Those switches | |
880 | * need custom routines to switch properly. For all | |
881 | * other frontends, the following shoule work ok. | |
882 | * Dish network legacy switches (as used by Dish500) | |
883 | * are controlled by sending 9-bit command words | |
884 | * spaced 8msec apart. | |
885 | * the actual command word is switch/port dependant | |
886 | * so it is up to the userspace application to send | |
887 | * the right command. | |
888 | * The command must always start with a '0' after | |
889 | * initialization, so parg is 8 bits and does not | |
890 | * include the initialization or start bit | |
891 | */ | |
400b7083 | 892 | unsigned long cmd = ((unsigned long) parg) << 1; |
83b75b04 N |
893 | struct timeval nexttime; |
894 | struct timeval tv[10]; | |
895 | int i; | |
896 | u8 last = 1; | |
897 | if (dvb_frontend_debug) | |
400b7083 | 898 | printk("%s switch command: 0x%04lx\n", __FUNCTION__, cmd); |
83b75b04 N |
899 | do_gettimeofday(&nexttime); |
900 | if (dvb_frontend_debug) | |
901 | memcpy(&tv[0], &nexttime, sizeof(struct timeval)); | |
902 | /* before sending a command, initialize by sending | |
903 | * a 32ms 18V to the switch | |
904 | */ | |
dea74869 | 905 | fe->ops.set_voltage(fe, SEC_VOLTAGE_18); |
83b75b04 N |
906 | dvb_frontend_sleep_until(&nexttime, 32000); |
907 | ||
908 | for (i = 0; i < 9; i++) { | |
909 | if (dvb_frontend_debug) | |
910 | do_gettimeofday(&tv[i + 1]); | |
911 | if ((cmd & 0x01) != last) { | |
912 | /* set voltage to (last ? 13V : 18V) */ | |
dea74869 | 913 | fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); |
83b75b04 N |
914 | last = (last) ? 0 : 1; |
915 | } | |
916 | cmd = cmd >> 1; | |
917 | if (i != 8) | |
918 | dvb_frontend_sleep_until(&nexttime, 8000); | |
919 | } | |
920 | if (dvb_frontend_debug) { | |
921 | printk("%s(%d): switch delay (should be 32k followed by all 8k\n", | |
922 | __FUNCTION__, fe->dvb->num); | |
923 | for (i = 1; i < 10; i++) | |
924 | printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); | |
925 | } | |
926 | err = 0; | |
927 | fepriv->state = FESTATE_DISEQC; | |
928 | fepriv->status = 0; | |
1da177e4 LT |
929 | } |
930 | break; | |
931 | ||
932 | case FE_DISEQC_RECV_SLAVE_REPLY: | |
dea74869 PB |
933 | if (fe->ops.diseqc_recv_slave_reply) |
934 | err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); | |
1da177e4 LT |
935 | break; |
936 | ||
937 | case FE_ENABLE_HIGH_LNB_VOLTAGE: | |
dea74869 PB |
938 | if (fe->ops.enable_high_lnb_voltage) |
939 | err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); | |
1da177e4 LT |
940 | break; |
941 | ||
942 | case FE_SET_FRONTEND: { | |
943 | struct dvb_frontend_tune_settings fetunesettings; | |
944 | ||
1fab46f0 OE |
945 | if (dvb_frontend_check_parameters(fe, parg) < 0) { |
946 | err = -EINVAL; | |
947 | break; | |
948 | } | |
949 | ||
1da177e4 LT |
950 | memcpy (&fepriv->parameters, parg, |
951 | sizeof (struct dvb_frontend_parameters)); | |
952 | ||
953 | memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); | |
954 | memcpy(&fetunesettings.parameters, parg, | |
955 | sizeof (struct dvb_frontend_parameters)); | |
956 | ||
957 | /* force auto frequency inversion if requested */ | |
958 | if (dvb_force_auto_inversion) { | |
959 | fepriv->parameters.inversion = INVERSION_AUTO; | |
960 | fetunesettings.parameters.inversion = INVERSION_AUTO; | |
961 | } | |
dea74869 | 962 | if (fe->ops.info.type == FE_OFDM) { |
1b3c3714 | 963 | /* without hierarchical coding code_rate_LP is irrelevant, |
1da177e4 LT |
964 | * so we tolerate the otherwise invalid FEC_NONE setting */ |
965 | if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE && | |
966 | fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE) | |
967 | fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO; | |
968 | } | |
969 | ||
970 | /* get frontend-specific tuning settings */ | |
dea74869 | 971 | if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { |
1da177e4 LT |
972 | fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; |
973 | fepriv->max_drift = fetunesettings.max_drift; | |
974 | fepriv->step_size = fetunesettings.step_size; | |
975 | } else { | |
976 | /* default values */ | |
dea74869 | 977 | switch(fe->ops.info.type) { |
1da177e4 LT |
978 | case FE_QPSK: |
979 | fepriv->min_delay = HZ/20; | |
980 | fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000; | |
981 | fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000; | |
982 | break; | |
983 | ||
984 | case FE_QAM: | |
985 | fepriv->min_delay = HZ/20; | |
986 | fepriv->step_size = 0; /* no zigzag */ | |
987 | fepriv->max_drift = 0; | |
988 | break; | |
989 | ||
990 | case FE_OFDM: | |
991 | fepriv->min_delay = HZ/20; | |
dea74869 PB |
992 | fepriv->step_size = fe->ops.info.frequency_stepsize * 2; |
993 | fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; | |
1da177e4 LT |
994 | break; |
995 | case FE_ATSC: | |
4821fb1d MA |
996 | fepriv->min_delay = HZ/20; |
997 | fepriv->step_size = 0; | |
998 | fepriv->max_drift = 0; | |
1da177e4 LT |
999 | break; |
1000 | } | |
1001 | } | |
1002 | if (dvb_override_tune_delay > 0) | |
1003 | fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; | |
1004 | ||
1005 | fepriv->state = FESTATE_RETUNE; | |
1006 | dvb_frontend_wakeup(fe); | |
1007 | dvb_frontend_add_event(fe, 0); | |
1008 | fepriv->status = 0; | |
1009 | err = 0; | |
1010 | break; | |
1011 | } | |
1012 | ||
1013 | case FE_GET_EVENT: | |
1014 | err = dvb_frontend_get_event (fe, parg, file->f_flags); | |
1015 | break; | |
1016 | ||
1017 | case FE_GET_FRONTEND: | |
dea74869 | 1018 | if (fe->ops.get_frontend) { |
1da177e4 | 1019 | memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters)); |
dea74869 | 1020 | err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg); |
1da177e4 LT |
1021 | } |
1022 | break; | |
36cb557a AQ |
1023 | |
1024 | case FE_SET_FRONTEND_TUNE_MODE: | |
e18828e4 | 1025 | fepriv->tune_mode_flags = (unsigned long) parg; |
1b172e0c | 1026 | err = 0; |
36cb557a | 1027 | break; |
1da177e4 LT |
1028 | }; |
1029 | ||
1030 | up (&fepriv->sem); | |
1031 | return err; | |
1032 | } | |
1033 | ||
1034 | static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) | |
1035 | { | |
1036 | struct dvb_device *dvbdev = file->private_data; | |
1037 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 1038 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
1039 | |
1040 | dprintk ("%s\n", __FUNCTION__); | |
1041 | ||
1042 | poll_wait (file, &fepriv->events.wait_queue, wait); | |
1043 | ||
1044 | if (fepriv->events.eventw != fepriv->events.eventr) | |
1045 | return (POLLIN | POLLRDNORM | POLLPRI); | |
1046 | ||
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | static int dvb_frontend_open(struct inode *inode, struct file *file) | |
1051 | { | |
1052 | struct dvb_device *dvbdev = file->private_data; | |
1053 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 1054 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
1055 | int ret; |
1056 | ||
1057 | dprintk ("%s\n", __FUNCTION__); | |
1058 | ||
48136e1e OE |
1059 | if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { |
1060 | if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) | |
ba7e6f3e | 1061 | return ret; |
ba7e6f3e ST |
1062 | } |
1063 | ||
48136e1e OE |
1064 | if ((ret = dvb_generic_open (inode, file)) < 0) |
1065 | goto err1; | |
04c56d0e | 1066 | |
48136e1e | 1067 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) { |
04c56d0e AQ |
1068 | /* normal tune mode when opened R/W */ |
1069 | fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; | |
1070 | fepriv->tone = -1; | |
1071 | fepriv->voltage = -1; | |
1072 | ||
1da177e4 LT |
1073 | ret = dvb_frontend_start (fe); |
1074 | if (ret) | |
48136e1e | 1075 | goto err2; |
1da177e4 LT |
1076 | |
1077 | /* empty event queue */ | |
1078 | fepriv->events.eventr = fepriv->events.eventw = 0; | |
1079 | } | |
1080 | ||
1081 | return ret; | |
48136e1e OE |
1082 | |
1083 | err2: | |
1084 | dvb_generic_release(inode, file); | |
1085 | err1: | |
1086 | if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) | |
1087 | fe->ops.ts_bus_ctrl(fe, 0); | |
1088 | return ret; | |
1da177e4 LT |
1089 | } |
1090 | ||
1091 | static int dvb_frontend_release(struct inode *inode, struct file *file) | |
1092 | { | |
1093 | struct dvb_device *dvbdev = file->private_data; | |
1094 | struct dvb_frontend *fe = dvbdev->priv; | |
0c53c70f | 1095 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
ca5be9cd | 1096 | int ret; |
1da177e4 LT |
1097 | |
1098 | dprintk ("%s\n", __FUNCTION__); | |
1099 | ||
1100 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) | |
1101 | fepriv->release_jiffies = jiffies; | |
1102 | ||
ca5be9cd MR |
1103 | ret = dvb_generic_release (inode, file); |
1104 | ||
48136e1e OE |
1105 | if (dvbdev->users == -1) { |
1106 | if (fepriv->exit == 1) { | |
1107 | fops_put(file->f_op); | |
1108 | file->f_op = NULL; | |
1109 | wake_up(&dvbdev->wait_queue); | |
1110 | } | |
1111 | if (fe->ops.ts_bus_ctrl) | |
1112 | fe->ops.ts_bus_ctrl(fe, 0); | |
ca5be9cd | 1113 | } |
48136e1e | 1114 | |
ca5be9cd | 1115 | return ret; |
1da177e4 LT |
1116 | } |
1117 | ||
1118 | static struct file_operations dvb_frontend_fops = { | |
1119 | .owner = THIS_MODULE, | |
1120 | .ioctl = dvb_generic_ioctl, | |
1121 | .poll = dvb_frontend_poll, | |
1122 | .open = dvb_frontend_open, | |
1123 | .release = dvb_frontend_release | |
1124 | }; | |
1125 | ||
1126 | int dvb_register_frontend(struct dvb_adapter* dvb, | |
1127 | struct dvb_frontend* fe) | |
1128 | { | |
1129 | struct dvb_frontend_private *fepriv; | |
1130 | static const struct dvb_device dvbdev_template = { | |
1131 | .users = ~0, | |
1132 | .writers = 1, | |
1133 | .readers = (~0)-1, | |
1134 | .fops = &dvb_frontend_fops, | |
1135 | .kernel_ioctl = dvb_frontend_ioctl | |
1136 | }; | |
1137 | ||
1138 | dprintk ("%s\n", __FUNCTION__); | |
1139 | ||
3593cab5 | 1140 | if (mutex_lock_interruptible(&frontend_mutex)) |
1da177e4 LT |
1141 | return -ERESTARTSYS; |
1142 | ||
7408187d | 1143 | fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); |
1da177e4 | 1144 | if (fe->frontend_priv == NULL) { |
3593cab5 | 1145 | mutex_unlock(&frontend_mutex); |
1da177e4 LT |
1146 | return -ENOMEM; |
1147 | } | |
0c53c70f | 1148 | fepriv = fe->frontend_priv; |
1da177e4 LT |
1149 | |
1150 | init_MUTEX (&fepriv->sem); | |
1151 | init_waitqueue_head (&fepriv->wait_queue); | |
1152 | init_waitqueue_head (&fepriv->events.wait_queue); | |
03b76123 | 1153 | mutex_init(&fepriv->events.mtx); |
1da177e4 LT |
1154 | fe->dvb = dvb; |
1155 | fepriv->inversion = INVERSION_OFF; | |
1156 | ||
1157 | printk ("DVB: registering frontend %i (%s)...\n", | |
1158 | fe->dvb->num, | |
dea74869 | 1159 | fe->ops.info.name); |
1da177e4 LT |
1160 | |
1161 | dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, | |
1162 | fe, DVB_DEVICE_FRONTEND); | |
1163 | ||
3593cab5 | 1164 | mutex_unlock(&frontend_mutex); |
1da177e4 LT |
1165 | return 0; |
1166 | } | |
1167 | EXPORT_SYMBOL(dvb_register_frontend); | |
1168 | ||
1169 | int dvb_unregister_frontend(struct dvb_frontend* fe) | |
1170 | { | |
0c53c70f | 1171 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
1da177e4 LT |
1172 | dprintk ("%s\n", __FUNCTION__); |
1173 | ||
57861b43 | 1174 | mutex_lock(&frontend_mutex); |
ca5be9cd | 1175 | dvb_frontend_stop (fe); |
57861b43 MR |
1176 | mutex_unlock(&frontend_mutex); |
1177 | ||
1178 | if (fepriv->dvbdev->users < -1) | |
1179 | wait_event(fepriv->dvbdev->wait_queue, | |
1180 | fepriv->dvbdev->users==-1); | |
1181 | ||
3593cab5 | 1182 | mutex_lock(&frontend_mutex); |
1da177e4 | 1183 | dvb_unregister_device (fepriv->dvbdev); |
d9955060 | 1184 | |
1da177e4 LT |
1185 | /* fe is invalid now */ |
1186 | kfree(fepriv); | |
3593cab5 | 1187 | mutex_unlock(&frontend_mutex); |
1da177e4 LT |
1188 | return 0; |
1189 | } | |
1190 | EXPORT_SYMBOL(dvb_unregister_frontend); | |
f52a838b | 1191 | |
7df0994d | 1192 | #ifdef CONFIG_DVB_CORE_ATTACH |
f52a838b AQ |
1193 | void dvb_frontend_detach(struct dvb_frontend* fe) |
1194 | { | |
1195 | void *ptr; | |
1196 | ||
1197 | if (fe->ops.release_sec) { | |
1198 | fe->ops.release_sec(fe); | |
1199 | symbol_put_addr(fe->ops.release_sec); | |
1200 | } | |
1201 | if (fe->ops.tuner_ops.release) { | |
1202 | fe->ops.tuner_ops.release(fe); | |
1203 | symbol_put_addr(fe->ops.tuner_ops.release); | |
1204 | } | |
1205 | ptr = (void*)fe->ops.release; | |
1206 | if (ptr) { | |
1207 | fe->ops.release(fe); | |
1208 | symbol_put_addr(ptr); | |
1209 | } | |
1210 | } | |
1211 | #else | |
1212 | void dvb_frontend_detach(struct dvb_frontend* fe) | |
1213 | { | |
1214 | if (fe->ops.release_sec) | |
1215 | fe->ops.release_sec(fe); | |
1216 | if (fe->ops.tuner_ops.release) | |
1217 | fe->ops.tuner_ops.release(fe); | |
1218 | if (fe->ops.release) | |
1219 | fe->ops.release(fe); | |
1220 | } | |
1221 | #endif | |
1222 | EXPORT_SYMBOL(dvb_frontend_detach); |