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[pohmelfs.git] / drivers / media / dvb / dvb-core / dvb_frontend.c
blobfbbe545a74cb5357c3c1cdf445511c80f32dd724
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 /* Enables DVBv3 compatibility bits at the headers */
29 #define __DVB_CORE__
30
31 #include <linux/string.h>
32 #include <linux/kernel.h>
33 #include <linux/sched.h>
34 #include <linux/wait.h>
35 #include <linux/slab.h>
36 #include <linux/poll.h>
37 #include <linux/semaphore.h>
38 #include <linux/module.h>
39 #include <linux/list.h>
40 #include <linux/freezer.h>
41 #include <linux/jiffies.h>
42 #include <linux/kthread.h>
43 #include <asm/processor.h>
44
45 #include "dvb_frontend.h"
46 #include "dvbdev.h"
47 #include <linux/dvb/version.h>
48
49 static int dvb_frontend_debug;
50 static int dvb_shutdown_timeout;
51 static int dvb_force_auto_inversion;
52 static int dvb_override_tune_delay;
53 static int dvb_powerdown_on_sleep = 1;
54 static int dvb_mfe_wait_time = 5;
55
56 module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
57 MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
58 module_param(dvb_shutdown_timeout, int, 0644);
59 MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
60 module_param(dvb_force_auto_inversion, int, 0644);
61 MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
62 module_param(dvb_override_tune_delay, int, 0644);
63 MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
64 module_param(dvb_powerdown_on_sleep, int, 0644);
65 MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
66 module_param(dvb_mfe_wait_time, int, 0644);
67 MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)");
68
69 #define dprintk if (dvb_frontend_debug) printk
70
71 #define FESTATE_IDLE 1
72 #define FESTATE_RETUNE 2
73 #define FESTATE_TUNING_FAST 4
74 #define FESTATE_TUNING_SLOW 8
75 #define FESTATE_TUNED 16
76 #define FESTATE_ZIGZAG_FAST 32
77 #define FESTATE_ZIGZAG_SLOW 64
78 #define FESTATE_DISEQC 128
79 #define FESTATE_ERROR 256
80 #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
81 #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
82 #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
83 #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
84
85 #define FE_ALGO_HW 1
86 /*
87 * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
88 * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
89 * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
90 * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
91 * FESTATE_TUNED. The frontend has successfully locked on.
92 * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
93 * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
94 * FESTATE_DISEQC. A DISEQC command has just been issued.
95 * FESTATE_WAITFORLOCK. When we're waiting for a lock.
96 * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
97 * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
98 * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
99 */
100
101 #define DVB_FE_NO_EXIT 0
102 #define DVB_FE_NORMAL_EXIT 1
103 #define DVB_FE_DEVICE_REMOVED 2
104
105 static DEFINE_MUTEX(frontend_mutex);
106
107 struct dvb_frontend_private {
108
109 /* thread/frontend values */
110 struct dvb_device *dvbdev;
111 struct dvb_frontend_parameters parameters_out;
112 struct dvb_fe_events events;
113 struct semaphore sem;
114 struct list_head list_head;
115 wait_queue_head_t wait_queue;
116 struct task_struct *thread;
117 unsigned long release_jiffies;
118 unsigned int exit;
119 unsigned int wakeup;
120 fe_status_t status;
121 unsigned long tune_mode_flags;
122 unsigned int delay;
123 unsigned int reinitialise;
124 int tone;
125 int voltage;
126
127 /* swzigzag values */
128 unsigned int state;
129 unsigned int bending;
130 int lnb_drift;
131 unsigned int inversion;
132 unsigned int auto_step;
133 unsigned int auto_sub_step;
134 unsigned int started_auto_step;
135 unsigned int min_delay;
136 unsigned int max_drift;
137 unsigned int step_size;
138 int quality;
139 unsigned int check_wrapped;
140 enum dvbfe_search algo_status;
141 };
142
143 static void dvb_frontend_wakeup(struct dvb_frontend *fe);
144 static int dtv_get_frontend(struct dvb_frontend *fe,
145 struct dvb_frontend_parameters *p_out);
146
147 static bool has_get_frontend(struct dvb_frontend *fe)
148 {
149 return fe->ops.get_frontend;
150 }
151
152 /*
153 * Due to DVBv3 API calls, a delivery system should be mapped into one of
154 * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
155 * otherwise, a DVBv3 call will fail.
156 */
157 enum dvbv3_emulation_type {
158 DVBV3_UNKNOWN,
159 DVBV3_QPSK,
160 DVBV3_QAM,
161 DVBV3_OFDM,
162 DVBV3_ATSC,
163 };
164
165 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
166 {
167 switch (delivery_system) {
168 case SYS_DVBC_ANNEX_A:
169 case SYS_DVBC_ANNEX_C:
170 return DVBV3_QAM;
171 case SYS_DVBS:
172 case SYS_DVBS2:
173 case SYS_TURBO:
174 case SYS_ISDBS:
175 case SYS_DSS:
176 return DVBV3_QPSK;
177 case SYS_DVBT:
178 case SYS_DVBT2:
179 case SYS_ISDBT:
180 case SYS_DMBTH:
181 return DVBV3_OFDM;
182 case SYS_ATSC:
183 case SYS_DVBC_ANNEX_B:
184 return DVBV3_ATSC;
185 case SYS_UNDEFINED:
186 case SYS_ISDBC:
187 case SYS_DVBH:
188 case SYS_DAB:
189 case SYS_ATSCMH:
190 default:
191 /*
192 * Doesn't know how to emulate those types and/or
193 * there's no frontend driver from this type yet
194 * with some emulation code, so, we're not sure yet how
195 * to handle them, or they're not compatible with a DVBv3 call.
196 */
197 return DVBV3_UNKNOWN;
198 }
199 }
200
201 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
202 {
203 struct dvb_frontend_private *fepriv = fe->frontend_priv;
204 struct dvb_fe_events *events = &fepriv->events;
205 struct dvb_frontend_event *e;
206 int wp;
207
208 dprintk ("%s\n", __func__);
209
210 if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
211 dtv_get_frontend(fe, &fepriv->parameters_out);
212
213 mutex_lock(&events->mtx);
214
215 wp = (events->eventw + 1) % MAX_EVENT;
216 if (wp == events->eventr) {
217 events->overflow = 1;
218 events->eventr = (events->eventr + 1) % MAX_EVENT;
219 }
220
221 e = &events->events[events->eventw];
222 e->status = status;
223 e->parameters = fepriv->parameters_out;
224
225 events->eventw = wp;
226
227 mutex_unlock(&events->mtx);
228
229 wake_up_interruptible (&events->wait_queue);
230 }
231
232 static int dvb_frontend_get_event(struct dvb_frontend *fe,
233 struct dvb_frontend_event *event, int flags)
234 {
235 struct dvb_frontend_private *fepriv = fe->frontend_priv;
236 struct dvb_fe_events *events = &fepriv->events;
237
238 dprintk ("%s\n", __func__);
239
240 if (events->overflow) {
241 events->overflow = 0;
242 return -EOVERFLOW;
243 }
244
245 if (events->eventw == events->eventr) {
246 int ret;
247
248 if (flags & O_NONBLOCK)
249 return -EWOULDBLOCK;
250
251 up(&fepriv->sem);
252
253 ret = wait_event_interruptible (events->wait_queue,
254 events->eventw != events->eventr);
255
256 if (down_interruptible (&fepriv->sem))
257 return -ERESTARTSYS;
258
259 if (ret < 0)
260 return ret;
261 }
262
263 mutex_lock(&events->mtx);
264 *event = events->events[events->eventr];
265 events->eventr = (events->eventr + 1) % MAX_EVENT;
266 mutex_unlock(&events->mtx);
267
268 return 0;
269 }
270
271 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
272 {
273 struct dvb_frontend_private *fepriv = fe->frontend_priv;
274 struct dvb_fe_events *events = &fepriv->events;
275
276 mutex_lock(&events->mtx);
277 events->eventr = events->eventw;
278 mutex_unlock(&events->mtx);
279 }
280
281 static void dvb_frontend_init(struct dvb_frontend *fe)
282 {
283 dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
284 fe->dvb->num,
285 fe->id,
286 fe->ops.info.name);
287
288 if (fe->ops.init)
289 fe->ops.init(fe);
290 if (fe->ops.tuner_ops.init) {
291 if (fe->ops.i2c_gate_ctrl)
292 fe->ops.i2c_gate_ctrl(fe, 1);
293 fe->ops.tuner_ops.init(fe);
294 if (fe->ops.i2c_gate_ctrl)
295 fe->ops.i2c_gate_ctrl(fe, 0);
296 }
297 }
298
299 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
300 {
301 struct dvb_frontend_private *fepriv = fe->frontend_priv;
302
303 fepriv->reinitialise = 1;
304 dvb_frontend_wakeup(fe);
305 }
306 EXPORT_SYMBOL(dvb_frontend_reinitialise);
307
308 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
309 {
310 int q2;
311
312 dprintk ("%s\n", __func__);
313
314 if (locked)
315 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
316 else
317 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
318
319 q2 = fepriv->quality - 128;
320 q2 *= q2;
321
322 fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
323 }
324
325 /**
326 * Performs automatic twiddling of frontend parameters.
327 *
328 * @param fe The frontend concerned.
329 * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
330 * @returns Number of complete iterations that have been performed.
331 */
332 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
333 {
334 int autoinversion;
335 int ready = 0;
336 int fe_set_err = 0;
337 struct dvb_frontend_private *fepriv = fe->frontend_priv;
338 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
339 int original_inversion = c->inversion;
340 u32 original_frequency = c->frequency;
341
342 /* are we using autoinversion? */
343 autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
344 (c->inversion == INVERSION_AUTO));
345
346 /* setup parameters correctly */
347 while(!ready) {
348 /* calculate the lnb_drift */
349 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
350
351 /* wrap the auto_step if we've exceeded the maximum drift */
352 if (fepriv->lnb_drift > fepriv->max_drift) {
353 fepriv->auto_step = 0;
354 fepriv->auto_sub_step = 0;
355 fepriv->lnb_drift = 0;
356 }
357
358 /* perform inversion and +/- zigzag */
359 switch(fepriv->auto_sub_step) {
360 case 0:
361 /* try with the current inversion and current drift setting */
362 ready = 1;
363 break;
364
365 case 1:
366 if (!autoinversion) break;
367
368 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
369 ready = 1;
370 break;
371
372 case 2:
373 if (fepriv->lnb_drift == 0) break;
374
375 fepriv->lnb_drift = -fepriv->lnb_drift;
376 ready = 1;
377 break;
378
379 case 3:
380 if (fepriv->lnb_drift == 0) break;
381 if (!autoinversion) break;
382
383 fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
384 fepriv->lnb_drift = -fepriv->lnb_drift;
385 ready = 1;
386 break;
387
388 default:
389 fepriv->auto_step++;
390 fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
391 break;
392 }
393
394 if (!ready) fepriv->auto_sub_step++;
395 }
396
397 /* if this attempt would hit where we started, indicate a complete
398 * iteration has occurred */
399 if ((fepriv->auto_step == fepriv->started_auto_step) &&
400 (fepriv->auto_sub_step == 0) && check_wrapped) {
401 return 1;
402 }
403
404 dprintk("%s: drift:%i inversion:%i auto_step:%i "
405 "auto_sub_step:%i started_auto_step:%i\n",
406 __func__, fepriv->lnb_drift, fepriv->inversion,
407 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
408
409 /* set the frontend itself */
410 c->frequency += fepriv->lnb_drift;
411 if (autoinversion)
412 c->inversion = fepriv->inversion;
413 tmp = *c;
414 if (fe->ops.set_frontend)
415 fe_set_err = fe->ops.set_frontend(fe);
416 *c = tmp;
417 if (fe_set_err < 0) {
418 fepriv->state = FESTATE_ERROR;
419 return fe_set_err;
420 }
421
422 c->frequency = original_frequency;
423 c->inversion = original_inversion;
424
425 fepriv->auto_sub_step++;
426 return 0;
427 }
428
429 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
430 {
431 fe_status_t s = 0;
432 int retval = 0;
433 struct dvb_frontend_private *fepriv = fe->frontend_priv;
434 struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
435
436 /* if we've got no parameters, just keep idling */
437 if (fepriv->state & FESTATE_IDLE) {
438 fepriv->delay = 3*HZ;
439 fepriv->quality = 0;
440 return;
441 }
442
443 /* in SCAN mode, we just set the frontend when asked and leave it alone */
444 if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
445 if (fepriv->state & FESTATE_RETUNE) {
446 tmp = *c;
447 if (fe->ops.set_frontend)
448 retval = fe->ops.set_frontend(fe);
449 *c = tmp;
450 if (retval < 0)
451 fepriv->state = FESTATE_ERROR;
452 else
453 fepriv->state = FESTATE_TUNED;
454 }
455 fepriv->delay = 3*HZ;
456 fepriv->quality = 0;
457 return;
458 }
459
460 /* get the frontend status */
461 if (fepriv->state & FESTATE_RETUNE) {
462 s = 0;
463 } else {
464 if (fe->ops.read_status)
465 fe->ops.read_status(fe, &s);
466 if (s != fepriv->status) {
467 dvb_frontend_add_event(fe, s);
468 fepriv->status = s;
469 }
470 }
471
472 /* if we're not tuned, and we have a lock, move to the TUNED state */
473 if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
474 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
475 fepriv->state = FESTATE_TUNED;
476
477 /* if we're tuned, then we have determined the correct inversion */
478 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
479 (c->inversion == INVERSION_AUTO)) {
480 c->inversion = fepriv->inversion;
481 }
482 return;
483 }
484
485 /* if we are tuned already, check we're still locked */
486 if (fepriv->state & FESTATE_TUNED) {
487 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
488
489 /* we're tuned, and the lock is still good... */
490 if (s & FE_HAS_LOCK) {
491 return;
492 } else { /* if we _WERE_ tuned, but now don't have a lock */
493 fepriv->state = FESTATE_ZIGZAG_FAST;
494 fepriv->started_auto_step = fepriv->auto_step;
495 fepriv->check_wrapped = 0;
496 }
497 }
498
499 /* don't actually do anything if we're in the LOSTLOCK state,
500 * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
501 if ((fepriv->state & FESTATE_LOSTLOCK) &&
502 (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
503 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
504 return;
505 }
506
507 /* don't do anything if we're in the DISEQC state, since this
508 * might be someone with a motorized dish controlled by DISEQC.
509 * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
510 if (fepriv->state & FESTATE_DISEQC) {
511 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
512 return;
513 }
514
515 /* if we're in the RETUNE state, set everything up for a brand
516 * new scan, keeping the current inversion setting, as the next
517 * tune is _very_ likely to require the same */
518 if (fepriv->state & FESTATE_RETUNE) {
519 fepriv->lnb_drift = 0;
520 fepriv->auto_step = 0;
521 fepriv->auto_sub_step = 0;
522 fepriv->started_auto_step = 0;
523 fepriv->check_wrapped = 0;
524 }
525
526 /* fast zigzag. */
527 if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
528 fepriv->delay = fepriv->min_delay;
529
530 /* perform a tune */
531 retval = dvb_frontend_swzigzag_autotune(fe,
532 fepriv->check_wrapped);
533 if (retval < 0) {
534 return;
535 } else if (retval) {
536 /* OK, if we've run out of trials at the fast speed.
537 * Drop back to slow for the _next_ attempt */
538 fepriv->state = FESTATE_SEARCHING_SLOW;
539 fepriv->started_auto_step = fepriv->auto_step;
540 return;
541 }
542 fepriv->check_wrapped = 1;
543
544 /* if we've just retuned, enter the ZIGZAG_FAST state.
545 * This ensures we cannot return from an
546 * FE_SET_FRONTEND ioctl before the first frontend tune
547 * occurs */
548 if (fepriv->state & FESTATE_RETUNE) {
549 fepriv->state = FESTATE_TUNING_FAST;
550 }
551 }
552
553 /* slow zigzag */
554 if (fepriv->state & FESTATE_SEARCHING_SLOW) {
555 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
556
557 /* Note: don't bother checking for wrapping; we stay in this
558 * state until we get a lock */
559 dvb_frontend_swzigzag_autotune(fe, 0);
560 }
561 }
562
563 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
564 {
565 struct dvb_frontend_private *fepriv = fe->frontend_priv;
566
567 if (fepriv->exit != DVB_FE_NO_EXIT)
568 return 1;
569
570 if (fepriv->dvbdev->writers == 1)
571 if (time_after_eq(jiffies, fepriv->release_jiffies +
572 dvb_shutdown_timeout * HZ))
573 return 1;
574
575 return 0;
576 }
577
578 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
579 {
580 struct dvb_frontend_private *fepriv = fe->frontend_priv;
581
582 if (fepriv->wakeup) {
583 fepriv->wakeup = 0;
584 return 1;
585 }
586 return dvb_frontend_is_exiting(fe);
587 }
588
589 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
590 {
591 struct dvb_frontend_private *fepriv = fe->frontend_priv;
592
593 fepriv->wakeup = 1;
594 wake_up_interruptible(&fepriv->wait_queue);
595 }
596
597 static int dvb_frontend_thread(void *data)
598 {
599 struct dvb_frontend *fe = data;
600 struct dvb_frontend_private *fepriv = fe->frontend_priv;
601 fe_status_t s;
602 enum dvbfe_algo algo;
603
604 bool re_tune = false;
605
606 dprintk("%s\n", __func__);
607
608 fepriv->check_wrapped = 0;
609 fepriv->quality = 0;
610 fepriv->delay = 3*HZ;
611 fepriv->status = 0;
612 fepriv->wakeup = 0;
613 fepriv->reinitialise = 0;
614
615 dvb_frontend_init(fe);
616
617 set_freezable();
618 while (1) {
619 up(&fepriv->sem); /* is locked when we enter the thread... */
620 restart:
621 wait_event_interruptible_timeout(fepriv->wait_queue,
622 dvb_frontend_should_wakeup(fe) || kthread_should_stop()
623 || freezing(current),
624 fepriv->delay);
625
626 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
627 /* got signal or quitting */
628 fepriv->exit = DVB_FE_NORMAL_EXIT;
629 break;
630 }
631
632 if (try_to_freeze())
633 goto restart;
634
635 if (down_interruptible(&fepriv->sem))
636 break;
637
638 if (fepriv->reinitialise) {
639 dvb_frontend_init(fe);
640 if (fe->ops.set_tone && fepriv->tone != -1)
641 fe->ops.set_tone(fe, fepriv->tone);
642 if (fe->ops.set_voltage && fepriv->voltage != -1)
643 fe->ops.set_voltage(fe, fepriv->voltage);
644 fepriv->reinitialise = 0;
645 }
646
647 /* do an iteration of the tuning loop */
648 if (fe->ops.get_frontend_algo) {
649 algo = fe->ops.get_frontend_algo(fe);
650 switch (algo) {
651 case DVBFE_ALGO_HW:
652 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
653
654 if (fepriv->state & FESTATE_RETUNE) {
655 dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
656 re_tune = true;
657 fepriv->state = FESTATE_TUNED;
658 }
659
660 if (fe->ops.tune)
661 fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
662
663 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
664 dprintk("%s: state changed, adding current state\n", __func__);
665 dvb_frontend_add_event(fe, s);
666 fepriv->status = s;
667 }
668 break;
669 case DVBFE_ALGO_SW:
670 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
671 dvb_frontend_swzigzag(fe);
672 break;
673 case DVBFE_ALGO_CUSTOM:
674 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
675 if (fepriv->state & FESTATE_RETUNE) {
676 dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
677 fepriv->state = FESTATE_TUNED;
678 }
679 /* Case where we are going to search for a carrier
680 * User asked us to retune again for some reason, possibly
681 * requesting a search with a new set of parameters
682 */
683 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
684 if (fe->ops.search) {
685 fepriv->algo_status = fe->ops.search(fe);
686 /* We did do a search as was requested, the flags are
687 * now unset as well and has the flags wrt to search.
688 */
689 } else {
690 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
691 }
692 }
693 /* Track the carrier if the search was successful */
694 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
695 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
696 fepriv->delay = HZ / 2;
697 }
698 fe->ops.read_status(fe, &s);
699 if (s != fepriv->status) {
700 dvb_frontend_add_event(fe, s); /* update event list */
701 fepriv->status = s;
702 if (!(s & FE_HAS_LOCK)) {
703 fepriv->delay = HZ / 10;
704 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
705 } else {
706 fepriv->delay = 60 * HZ;
707 }
708 }
709 break;
710 default:
711 dprintk("%s: UNDEFINED ALGO !\n", __func__);
712 break;
713 }
714 } else {
715 dvb_frontend_swzigzag(fe);
716 }
717 }
718
719 if (dvb_powerdown_on_sleep) {
720 if (fe->ops.set_voltage)
721 fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
722 if (fe->ops.tuner_ops.sleep) {
723 if (fe->ops.i2c_gate_ctrl)
724 fe->ops.i2c_gate_ctrl(fe, 1);
725 fe->ops.tuner_ops.sleep(fe);
726 if (fe->ops.i2c_gate_ctrl)
727 fe->ops.i2c_gate_ctrl(fe, 0);
728 }
729 if (fe->ops.sleep)
730 fe->ops.sleep(fe);
731 }
732
733 fepriv->thread = NULL;
734 if (kthread_should_stop())
735 fepriv->exit = DVB_FE_DEVICE_REMOVED;
736 else
737 fepriv->exit = DVB_FE_NO_EXIT;
738 mb();
739
740 dvb_frontend_wakeup(fe);
741 return 0;
742 }
743
744 static void dvb_frontend_stop(struct dvb_frontend *fe)
745 {
746 struct dvb_frontend_private *fepriv = fe->frontend_priv;
747
748 dprintk ("%s\n", __func__);
749
750 fepriv->exit = DVB_FE_NORMAL_EXIT;
751 mb();
752
753 if (!fepriv->thread)
754 return;
755
756 kthread_stop(fepriv->thread);
757
758 sema_init(&fepriv->sem, 1);
759 fepriv->state = FESTATE_IDLE;
760
761 /* paranoia check in case a signal arrived */
762 if (fepriv->thread)
763 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
764 fepriv->thread);
765 }
766
767 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
768 {
769 return ((curtime.tv_usec < lasttime.tv_usec) ?
770 1000000 - lasttime.tv_usec + curtime.tv_usec :
771 curtime.tv_usec - lasttime.tv_usec);
772 }
773 EXPORT_SYMBOL(timeval_usec_diff);
774
775 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
776 {
777 curtime->tv_usec += add_usec;
778 if (curtime->tv_usec >= 1000000) {
779 curtime->tv_usec -= 1000000;
780 curtime->tv_sec++;
781 }
782 }
783
784 /*
785 * Sleep until gettimeofday() > waketime + add_usec
786 * This needs to be as precise as possible, but as the delay is
787 * usually between 2ms and 32ms, it is done using a scheduled msleep
788 * followed by usleep (normally a busy-wait loop) for the remainder
789 */
790 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
791 {
792 struct timeval lasttime;
793 s32 delta, newdelta;
794
795 timeval_usec_add(waketime, add_usec);
796
797 do_gettimeofday(&lasttime);
798 delta = timeval_usec_diff(lasttime, *waketime);
799 if (delta > 2500) {
800 msleep((delta - 1500) / 1000);
801 do_gettimeofday(&lasttime);
802 newdelta = timeval_usec_diff(lasttime, *waketime);
803 delta = (newdelta > delta) ? 0 : newdelta;
804 }
805 if (delta > 0)
806 udelay(delta);
807 }
808 EXPORT_SYMBOL(dvb_frontend_sleep_until);
809
810 static int dvb_frontend_start(struct dvb_frontend *fe)
811 {
812 int ret;
813 struct dvb_frontend_private *fepriv = fe->frontend_priv;
814 struct task_struct *fe_thread;
815
816 dprintk ("%s\n", __func__);
817
818 if (fepriv->thread) {
819 if (fepriv->exit == DVB_FE_NO_EXIT)
820 return 0;
821 else
822 dvb_frontend_stop (fe);
823 }
824
825 if (signal_pending(current))
826 return -EINTR;
827 if (down_interruptible (&fepriv->sem))
828 return -EINTR;
829
830 fepriv->state = FESTATE_IDLE;
831 fepriv->exit = DVB_FE_NO_EXIT;
832 fepriv->thread = NULL;
833 mb();
834
835 fe_thread = kthread_run(dvb_frontend_thread, fe,
836 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
837 if (IS_ERR(fe_thread)) {
838 ret = PTR_ERR(fe_thread);
839 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
840 up(&fepriv->sem);
841 return ret;
842 }
843 fepriv->thread = fe_thread;
844 return 0;
845 }
846
847 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
848 u32 *freq_min, u32 *freq_max)
849 {
850 *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
851
852 if (fe->ops.info.frequency_max == 0)
853 *freq_max = fe->ops.tuner_ops.info.frequency_max;
854 else if (fe->ops.tuner_ops.info.frequency_max == 0)
855 *freq_max = fe->ops.info.frequency_max;
856 else
857 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
858
859 if (*freq_min == 0 || *freq_max == 0)
860 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
861 fe->dvb->num,fe->id);
862 }
863
864 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
865 {
866 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
867 u32 freq_min;
868 u32 freq_max;
869
870 /* range check: frequency */
871 dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
872 if ((freq_min && c->frequency < freq_min) ||
873 (freq_max && c->frequency > freq_max)) {
874 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
875 fe->dvb->num, fe->id, c->frequency, freq_min, freq_max);
876 return -EINVAL;
877 }
878
879 /* range check: symbol rate */
880 switch (c->delivery_system) {
881 case SYS_DVBS:
882 case SYS_DVBS2:
883 case SYS_TURBO:
884 case SYS_DVBC_ANNEX_A:
885 case SYS_DVBC_ANNEX_C:
886 if ((fe->ops.info.symbol_rate_min &&
887 c->symbol_rate < fe->ops.info.symbol_rate_min) ||
888 (fe->ops.info.symbol_rate_max &&
889 c->symbol_rate > fe->ops.info.symbol_rate_max)) {
890 printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
891 fe->dvb->num, fe->id, c->symbol_rate,
892 fe->ops.info.symbol_rate_min,
893 fe->ops.info.symbol_rate_max);
894 return -EINVAL;
895 }
896 default:
897 break;
898 }
899
900 return 0;
901 }
902
903 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
904 {
905 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
906 int i;
907 u32 delsys;
908
909 delsys = c->delivery_system;
910 memset(c, 0, sizeof(struct dtv_frontend_properties));
911 c->delivery_system = delsys;
912
913 c->state = DTV_CLEAR;
914
915 dprintk("%s() Clearing cache for delivery system %d\n", __func__,
916 c->delivery_system);
917
918 c->transmission_mode = TRANSMISSION_MODE_AUTO;
919 c->bandwidth_hz = 0; /* AUTO */
920 c->guard_interval = GUARD_INTERVAL_AUTO;
921 c->hierarchy = HIERARCHY_AUTO;
922 c->symbol_rate = 0;
923 c->code_rate_HP = FEC_AUTO;
924 c->code_rate_LP = FEC_AUTO;
925 c->fec_inner = FEC_AUTO;
926 c->rolloff = ROLLOFF_AUTO;
927 c->voltage = SEC_VOLTAGE_OFF;
928 c->sectone = SEC_TONE_OFF;
929 c->pilot = PILOT_AUTO;
930
931 c->isdbt_partial_reception = 0;
932 c->isdbt_sb_mode = 0;
933 c->isdbt_sb_subchannel = 0;
934 c->isdbt_sb_segment_idx = 0;
935 c->isdbt_sb_segment_count = 0;
936 c->isdbt_layer_enabled = 0;
937 for (i = 0; i < 3; i++) {
938 c->layer[i].fec = FEC_AUTO;
939 c->layer[i].modulation = QAM_AUTO;
940 c->layer[i].interleaving = 0;
941 c->layer[i].segment_count = 0;
942 }
943
944 c->isdbs_ts_id = 0;
945 c->dvbt2_plp_id = 0;
946
947 switch (c->delivery_system) {
948 case SYS_DVBS:
949 case SYS_DVBS2:
950 case SYS_TURBO:
951 c->modulation = QPSK; /* implied for DVB-S in legacy API */
952 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
953 break;
954 case SYS_ATSC:
955 c->modulation = VSB_8;
956 break;
957 default:
958 c->modulation = QAM_AUTO;
959 break;
960 }
961
962 return 0;
963 }
964
965 #define _DTV_CMD(n, s, b) \
966 [n] = { \
967 .name = #n, \
968 .cmd = n, \
969 .set = s,\
970 .buffer = b \
971 }
972
973 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
974 _DTV_CMD(DTV_TUNE, 1, 0),
975 _DTV_CMD(DTV_CLEAR, 1, 0),
976
977 /* Set */
978 _DTV_CMD(DTV_FREQUENCY, 1, 0),
979 _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
980 _DTV_CMD(DTV_MODULATION, 1, 0),
981 _DTV_CMD(DTV_INVERSION, 1, 0),
982 _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
983 _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
984 _DTV_CMD(DTV_INNER_FEC, 1, 0),
985 _DTV_CMD(DTV_VOLTAGE, 1, 0),
986 _DTV_CMD(DTV_TONE, 1, 0),
987 _DTV_CMD(DTV_PILOT, 1, 0),
988 _DTV_CMD(DTV_ROLLOFF, 1, 0),
989 _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
990 _DTV_CMD(DTV_HIERARCHY, 1, 0),
991 _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
992 _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
993 _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
994 _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
995
996 _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
997 _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
998 _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
999 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1000 _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1001 _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1002 _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1003 _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1004 _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1005 _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1006 _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1007 _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1008 _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1009 _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1010 _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1011 _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1012 _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1013 _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1014
1015 _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
1016 _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
1017
1018 /* Get */
1019 _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1020 _DTV_CMD(DTV_API_VERSION, 0, 0),
1021 _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
1022 _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
1023 _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
1024 _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
1025 _DTV_CMD(DTV_HIERARCHY, 0, 0),
1026
1027 _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1028 };
1029
1030 static void dtv_property_dump(struct dtv_property *tvp)
1031 {
1032 int i;
1033
1034 if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1035 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1036 __func__, tvp->cmd);
1037 return;
1038 }
1039
1040 dprintk("%s() tvp.cmd = 0x%08x (%s)\n"
1041 ,__func__
1042 ,tvp->cmd
1043 ,dtv_cmds[ tvp->cmd ].name);
1044
1045 if(dtv_cmds[ tvp->cmd ].buffer) {
1046
1047 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1048 ,__func__
1049 ,tvp->u.buffer.len);
1050
1051 for(i = 0; i < tvp->u.buffer.len; i++)
1052 dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1053 ,__func__
1054 ,i
1055 ,tvp->u.buffer.data[i]);
1056
1057 } else
1058 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1059 }
1060
1061 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1062 * drivers can use a single set_frontend tuning function, regardless of whether
1063 * it's being used for the legacy or new API, reducing code and complexity.
1064 */
1065 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1066 struct dtv_frontend_properties *c,
1067 const struct dvb_frontend_parameters *p)
1068 {
1069 c->frequency = p->frequency;
1070 c->inversion = p->inversion;
1071
1072 switch (dvbv3_type(c->delivery_system)) {
1073 case DVBV3_QPSK:
1074 dprintk("%s() Preparing QPSK req\n", __func__);
1075 c->symbol_rate = p->u.qpsk.symbol_rate;
1076 c->fec_inner = p->u.qpsk.fec_inner;
1077 break;
1078 case DVBV3_QAM:
1079 dprintk("%s() Preparing QAM req\n", __func__);
1080 c->symbol_rate = p->u.qam.symbol_rate;
1081 c->fec_inner = p->u.qam.fec_inner;
1082 c->modulation = p->u.qam.modulation;
1083 break;
1084 case DVBV3_OFDM:
1085 dprintk("%s() Preparing OFDM req\n", __func__);
1086 switch (p->u.ofdm.bandwidth) {
1087 case BANDWIDTH_10_MHZ:
1088 c->bandwidth_hz = 10000000;
1089 break;
1090 case BANDWIDTH_8_MHZ:
1091 c->bandwidth_hz = 8000000;
1092 break;
1093 case BANDWIDTH_7_MHZ:
1094 c->bandwidth_hz = 7000000;
1095 break;
1096 case BANDWIDTH_6_MHZ:
1097 c->bandwidth_hz = 6000000;
1098 break;
1099 case BANDWIDTH_5_MHZ:
1100 c->bandwidth_hz = 5000000;
1101 break;
1102 case BANDWIDTH_1_712_MHZ:
1103 c->bandwidth_hz = 1712000;
1104 break;
1105 case BANDWIDTH_AUTO:
1106 c->bandwidth_hz = 0;
1107 }
1108
1109 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1110 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1111 c->modulation = p->u.ofdm.constellation;
1112 c->transmission_mode = p->u.ofdm.transmission_mode;
1113 c->guard_interval = p->u.ofdm.guard_interval;
1114 c->hierarchy = p->u.ofdm.hierarchy_information;
1115 break;
1116 case DVBV3_ATSC:
1117 dprintk("%s() Preparing ATSC req\n", __func__);
1118 c->modulation = p->u.vsb.modulation;
1119 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1120 c->delivery_system = SYS_ATSC;
1121 else
1122 c->delivery_system = SYS_DVBC_ANNEX_B;
1123 break;
1124 case DVBV3_UNKNOWN:
1125 printk(KERN_ERR
1126 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1127 __func__, c->delivery_system);
1128 return -EINVAL;
1129 }
1130
1131 return 0;
1132 }
1133
1134 /* Ensure the cached values are set correctly in the frontend
1135 * legacy tuning structures, for the advanced tuning API.
1136 */
1137 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1138 struct dvb_frontend_parameters *p)
1139 {
1140 const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1141
1142 p->frequency = c->frequency;
1143 p->inversion = c->inversion;
1144
1145 switch (dvbv3_type(c->delivery_system)) {
1146 case DVBV3_UNKNOWN:
1147 printk(KERN_ERR
1148 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1149 __func__, c->delivery_system);
1150 return -EINVAL;
1151 case DVBV3_QPSK:
1152 dprintk("%s() Preparing QPSK req\n", __func__);
1153 p->u.qpsk.symbol_rate = c->symbol_rate;
1154 p->u.qpsk.fec_inner = c->fec_inner;
1155 break;
1156 case DVBV3_QAM:
1157 dprintk("%s() Preparing QAM req\n", __func__);
1158 p->u.qam.symbol_rate = c->symbol_rate;
1159 p->u.qam.fec_inner = c->fec_inner;
1160 p->u.qam.modulation = c->modulation;
1161 break;
1162 case DVBV3_OFDM:
1163 dprintk("%s() Preparing OFDM req\n", __func__);
1164
1165 switch (c->bandwidth_hz) {
1166 case 10000000:
1167 p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1168 break;
1169 case 8000000:
1170 p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1171 break;
1172 case 7000000:
1173 p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1174 break;
1175 case 6000000:
1176 p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1177 break;
1178 case 5000000:
1179 p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1180 break;
1181 case 1712000:
1182 p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1183 break;
1184 case 0:
1185 default:
1186 p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1187 }
1188 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1189 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1190 p->u.ofdm.constellation = c->modulation;
1191 p->u.ofdm.transmission_mode = c->transmission_mode;
1192 p->u.ofdm.guard_interval = c->guard_interval;
1193 p->u.ofdm.hierarchy_information = c->hierarchy;
1194 break;
1195 case DVBV3_ATSC:
1196 dprintk("%s() Preparing VSB req\n", __func__);
1197 p->u.vsb.modulation = c->modulation;
1198 break;
1199 }
1200 return 0;
1201 }
1202
1203 /**
1204 * dtv_get_frontend - calls a callback for retrieving DTV parameters
1205 * @fe: struct dvb_frontend pointer
1206 * @c: struct dtv_frontend_properties pointer (DVBv5 cache)
1207 * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1208 *
1209 * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1210 * If c is not null, it will update the DVBv5 cache struct pointed by it.
1211 * If p_out is not null, it will update the DVBv3 params pointed by it.
1212 */
1213 static int dtv_get_frontend(struct dvb_frontend *fe,
1214 struct dvb_frontend_parameters *p_out)
1215 {
1216 int r;
1217
1218 if (fe->ops.get_frontend) {
1219 r = fe->ops.get_frontend(fe);
1220 if (unlikely(r < 0))
1221 return r;
1222 if (p_out)
1223 dtv_property_legacy_params_sync(fe, p_out);
1224 return 0;
1225 }
1226
1227 /* As everything is in cache, get_frontend fops are always supported */
1228 return 0;
1229 }
1230
1231 static int dvb_frontend_ioctl_legacy(struct file *file,
1232 unsigned int cmd, void *parg);
1233 static int dvb_frontend_ioctl_properties(struct file *file,
1234 unsigned int cmd, void *parg);
1235
1236 static int dtv_property_process_get(struct dvb_frontend *fe,
1237 const struct dtv_frontend_properties *c,
1238 struct dtv_property *tvp,
1239 struct file *file)
1240 {
1241 int r, ncaps;
1242
1243 switch(tvp->cmd) {
1244 case DTV_ENUM_DELSYS:
1245 ncaps = 0;
1246 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1247 tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1248 ncaps++;
1249 }
1250 tvp->u.buffer.len = ncaps;
1251 break;
1252 case DTV_FREQUENCY:
1253 tvp->u.data = c->frequency;
1254 break;
1255 case DTV_MODULATION:
1256 tvp->u.data = c->modulation;
1257 break;
1258 case DTV_BANDWIDTH_HZ:
1259 tvp->u.data = c->bandwidth_hz;
1260 break;
1261 case DTV_INVERSION:
1262 tvp->u.data = c->inversion;
1263 break;
1264 case DTV_SYMBOL_RATE:
1265 tvp->u.data = c->symbol_rate;
1266 break;
1267 case DTV_INNER_FEC:
1268 tvp->u.data = c->fec_inner;
1269 break;
1270 case DTV_PILOT:
1271 tvp->u.data = c->pilot;
1272 break;
1273 case DTV_ROLLOFF:
1274 tvp->u.data = c->rolloff;
1275 break;
1276 case DTV_DELIVERY_SYSTEM:
1277 tvp->u.data = c->delivery_system;
1278 break;
1279 case DTV_VOLTAGE:
1280 tvp->u.data = c->voltage;
1281 break;
1282 case DTV_TONE:
1283 tvp->u.data = c->sectone;
1284 break;
1285 case DTV_API_VERSION:
1286 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1287 break;
1288 case DTV_CODE_RATE_HP:
1289 tvp->u.data = c->code_rate_HP;
1290 break;
1291 case DTV_CODE_RATE_LP:
1292 tvp->u.data = c->code_rate_LP;
1293 break;
1294 case DTV_GUARD_INTERVAL:
1295 tvp->u.data = c->guard_interval;
1296 break;
1297 case DTV_TRANSMISSION_MODE:
1298 tvp->u.data = c->transmission_mode;
1299 break;
1300 case DTV_HIERARCHY:
1301 tvp->u.data = c->hierarchy;
1302 break;
1303
1304 /* ISDB-T Support here */
1305 case DTV_ISDBT_PARTIAL_RECEPTION:
1306 tvp->u.data = c->isdbt_partial_reception;
1307 break;
1308 case DTV_ISDBT_SOUND_BROADCASTING:
1309 tvp->u.data = c->isdbt_sb_mode;
1310 break;
1311 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1312 tvp->u.data = c->isdbt_sb_subchannel;
1313 break;
1314 case DTV_ISDBT_SB_SEGMENT_IDX:
1315 tvp->u.data = c->isdbt_sb_segment_idx;
1316 break;
1317 case DTV_ISDBT_SB_SEGMENT_COUNT:
1318 tvp->u.data = c->isdbt_sb_segment_count;
1319 break;
1320 case DTV_ISDBT_LAYER_ENABLED:
1321 tvp->u.data = c->isdbt_layer_enabled;
1322 break;
1323 case DTV_ISDBT_LAYERA_FEC:
1324 tvp->u.data = c->layer[0].fec;
1325 break;
1326 case DTV_ISDBT_LAYERA_MODULATION:
1327 tvp->u.data = c->layer[0].modulation;
1328 break;
1329 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1330 tvp->u.data = c->layer[0].segment_count;
1331 break;
1332 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1333 tvp->u.data = c->layer[0].interleaving;
1334 break;
1335 case DTV_ISDBT_LAYERB_FEC:
1336 tvp->u.data = c->layer[1].fec;
1337 break;
1338 case DTV_ISDBT_LAYERB_MODULATION:
1339 tvp->u.data = c->layer[1].modulation;
1340 break;
1341 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1342 tvp->u.data = c->layer[1].segment_count;
1343 break;
1344 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1345 tvp->u.data = c->layer[1].interleaving;
1346 break;
1347 case DTV_ISDBT_LAYERC_FEC:
1348 tvp->u.data = c->layer[2].fec;
1349 break;
1350 case DTV_ISDBT_LAYERC_MODULATION:
1351 tvp->u.data = c->layer[2].modulation;
1352 break;
1353 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1354 tvp->u.data = c->layer[2].segment_count;
1355 break;
1356 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1357 tvp->u.data = c->layer[2].interleaving;
1358 break;
1359 case DTV_ISDBS_TS_ID:
1360 tvp->u.data = c->isdbs_ts_id;
1361 break;
1362 case DTV_DVBT2_PLP_ID:
1363 tvp->u.data = c->dvbt2_plp_id;
1364 break;
1365 default:
1366 return -EINVAL;
1367 }
1368
1369 /* Allow the frontend to override outgoing properties */
1370 if (fe->ops.get_property) {
1371 r = fe->ops.get_property(fe, tvp);
1372 if (r < 0)
1373 return r;
1374 }
1375
1376 dtv_property_dump(tvp);
1377
1378 return 0;
1379 }
1380
1381 static int dtv_set_frontend(struct dvb_frontend *fe);
1382
1383 static bool is_dvbv3_delsys(u32 delsys)
1384 {
1385 bool status;
1386
1387 status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1388 (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1389
1390 return status;
1391 }
1392
1393 static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system)
1394 {
1395 int ncaps, i;
1396 u32 delsys = SYS_UNDEFINED;
1397 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1398 enum dvbv3_emulation_type type;
1399
1400 /*
1401 * It was reported that some old DVBv5 applications were
1402 * filling delivery_system with SYS_UNDEFINED. If this happens,
1403 * assume that the application wants to use the first supported
1404 * delivery system.
1405 */
1406 if (c->delivery_system == SYS_UNDEFINED)
1407 c->delivery_system = fe->ops.delsys[0];
1408
1409 if (desired_system == SYS_UNDEFINED) {
1410 /*
1411 * A DVBv3 call doesn't know what's the desired system.
1412 * Also, DVBv3 applications don't know that ops.info->type
1413 * could be changed, and they simply dies when it doesn't
1414 * match.
1415 * So, don't change the current delivery system, as it
1416 * may be trying to do the wrong thing, like setting an
1417 * ISDB-T frontend as DVB-T. Instead, find the closest
1418 * DVBv3 system that matches the delivery system.
1419 */
1420 if (is_dvbv3_delsys(c->delivery_system)) {
1421 dprintk("%s() Using delivery system to %d\n",
1422 __func__, c->delivery_system);
1423 return 0;
1424 }
1425 type = dvbv3_type(c->delivery_system);
1426 switch (type) {
1427 case DVBV3_QPSK:
1428 desired_system = SYS_DVBS;
1429 break;
1430 case DVBV3_QAM:
1431 desired_system = SYS_DVBC_ANNEX_A;
1432 break;
1433 case DVBV3_ATSC:
1434 desired_system = SYS_ATSC;
1435 break;
1436 case DVBV3_OFDM:
1437 desired_system = SYS_DVBT;
1438 break;
1439 default:
1440 dprintk("%s(): This frontend doesn't support DVBv3 calls\n",
1441 __func__);
1442 return -EINVAL;
1443 }
1444 } else {
1445 /*
1446 * This is a DVBv5 call. So, it likely knows the supported
1447 * delivery systems.
1448 */
1449
1450 /* Check if the desired delivery system is supported */
1451 ncaps = 0;
1452 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1453 if (fe->ops.delsys[ncaps] == desired_system) {
1454 c->delivery_system = desired_system;
1455 dprintk("%s() Changing delivery system to %d\n",
1456 __func__, desired_system);
1457 return 0;
1458 }
1459 ncaps++;
1460 }
1461 type = dvbv3_type(desired_system);
1462
1463 /*
1464 * The delivery system is not supported. See if it can be
1465 * emulated.
1466 * The emulation only works if the desired system is one of the
1467 * DVBv3 delivery systems
1468 */
1469 if (!is_dvbv3_delsys(desired_system)) {
1470 dprintk("%s() can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n",
1471 __func__);
1472 return -EINVAL;
1473 }
1474
1475 /*
1476 * Get the last non-DVBv3 delivery system that has the same type
1477 * of the desired system
1478 */
1479 ncaps = 0;
1480 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1481 if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) &&
1482 !is_dvbv3_delsys(fe->ops.delsys[ncaps]))
1483 delsys = fe->ops.delsys[ncaps];
1484 ncaps++;
1485 }
1486 /* There's nothing compatible with the desired delivery system */
1487 if (delsys == SYS_UNDEFINED) {
1488 dprintk("%s() Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n",
1489 __func__);
1490 return -EINVAL;
1491 }
1492 c->delivery_system = delsys;
1493 }
1494
1495 /*
1496 * The DVBv3 or DVBv5 call is requesting a different system. So,
1497 * emulation is needed.
1498 *
1499 * Emulate newer delivery systems like ISDBT, DVBT and DMBTH
1500 * for older DVBv5 applications. The emulation will try to use
1501 * the auto mode for most things, and will assume that the desired
1502 * delivery system is the last one at the ops.delsys[] array
1503 */
1504 dprintk("%s() Using delivery system %d emulated as if it were a %d\n",
1505 __func__, delsys, desired_system);
1506
1507 /*
1508 * For now, handles ISDB-T calls. More code may be needed here for the
1509 * other emulated stuff
1510 */
1511 if (type == DVBV3_OFDM) {
1512 if (c->delivery_system == SYS_ISDBT) {
1513 dprintk("%s() Using defaults for SYS_ISDBT\n",
1514 __func__);
1515 if (!c->bandwidth_hz)
1516 c->bandwidth_hz = 6000000;
1517
1518 c->isdbt_partial_reception = 0;
1519 c->isdbt_sb_mode = 0;
1520 c->isdbt_sb_subchannel = 0;
1521 c->isdbt_sb_segment_idx = 0;
1522 c->isdbt_sb_segment_count = 0;
1523 c->isdbt_layer_enabled = 0;
1524 for (i = 0; i < 3; i++) {
1525 c->layer[i].fec = FEC_AUTO;
1526 c->layer[i].modulation = QAM_AUTO;
1527 c->layer[i].interleaving = 0;
1528 c->layer[i].segment_count = 0;
1529 }
1530 }
1531 }
1532 dprintk("change delivery system on cache to %d\n", c->delivery_system);
1533
1534 return 0;
1535 }
1536
1537 static int dtv_property_process_set(struct dvb_frontend *fe,
1538 struct dtv_property *tvp,
1539 struct file *file)
1540 {
1541 int r = 0;
1542 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1543
1544 /* Allow the frontend to validate incoming properties */
1545 if (fe->ops.set_property) {
1546 r = fe->ops.set_property(fe, tvp);
1547 if (r < 0)
1548 return r;
1549 }
1550
1551 switch(tvp->cmd) {
1552 case DTV_CLEAR:
1553 /*
1554 * Reset a cache of data specific to the frontend here. This does
1555 * not effect hardware.
1556 */
1557 dvb_frontend_clear_cache(fe);
1558 break;
1559 case DTV_TUNE:
1560 /* interpret the cache of data, build either a traditional frontend
1561 * tunerequest so we can pass validation in the FE_SET_FRONTEND
1562 * ioctl.
1563 */
1564 c->state = tvp->cmd;
1565 dprintk("%s() Finalised property cache\n", __func__);
1566
1567 r = dtv_set_frontend(fe);
1568 break;
1569 case DTV_FREQUENCY:
1570 c->frequency = tvp->u.data;
1571 break;
1572 case DTV_MODULATION:
1573 c->modulation = tvp->u.data;
1574 break;
1575 case DTV_BANDWIDTH_HZ:
1576 c->bandwidth_hz = tvp->u.data;
1577 break;
1578 case DTV_INVERSION:
1579 c->inversion = tvp->u.data;
1580 break;
1581 case DTV_SYMBOL_RATE:
1582 c->symbol_rate = tvp->u.data;
1583 break;
1584 case DTV_INNER_FEC:
1585 c->fec_inner = tvp->u.data;
1586 break;
1587 case DTV_PILOT:
1588 c->pilot = tvp->u.data;
1589 break;
1590 case DTV_ROLLOFF:
1591 c->rolloff = tvp->u.data;
1592 break;
1593 case DTV_DELIVERY_SYSTEM:
1594 r = set_delivery_system(fe, tvp->u.data);
1595 break;
1596 case DTV_VOLTAGE:
1597 c->voltage = tvp->u.data;
1598 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1599 (void *)c->voltage);
1600 break;
1601 case DTV_TONE:
1602 c->sectone = tvp->u.data;
1603 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1604 (void *)c->sectone);
1605 break;
1606 case DTV_CODE_RATE_HP:
1607 c->code_rate_HP = tvp->u.data;
1608 break;
1609 case DTV_CODE_RATE_LP:
1610 c->code_rate_LP = tvp->u.data;
1611 break;
1612 case DTV_GUARD_INTERVAL:
1613 c->guard_interval = tvp->u.data;
1614 break;
1615 case DTV_TRANSMISSION_MODE:
1616 c->transmission_mode = tvp->u.data;
1617 break;
1618 case DTV_HIERARCHY:
1619 c->hierarchy = tvp->u.data;
1620 break;
1621
1622 /* ISDB-T Support here */
1623 case DTV_ISDBT_PARTIAL_RECEPTION:
1624 c->isdbt_partial_reception = tvp->u.data;
1625 break;
1626 case DTV_ISDBT_SOUND_BROADCASTING:
1627 c->isdbt_sb_mode = tvp->u.data;
1628 break;
1629 case DTV_ISDBT_SB_SUBCHANNEL_ID:
1630 c->isdbt_sb_subchannel = tvp->u.data;
1631 break;
1632 case DTV_ISDBT_SB_SEGMENT_IDX:
1633 c->isdbt_sb_segment_idx = tvp->u.data;
1634 break;
1635 case DTV_ISDBT_SB_SEGMENT_COUNT:
1636 c->isdbt_sb_segment_count = tvp->u.data;
1637 break;
1638 case DTV_ISDBT_LAYER_ENABLED:
1639 c->isdbt_layer_enabled = tvp->u.data;
1640 break;
1641 case DTV_ISDBT_LAYERA_FEC:
1642 c->layer[0].fec = tvp->u.data;
1643 break;
1644 case DTV_ISDBT_LAYERA_MODULATION:
1645 c->layer[0].modulation = tvp->u.data;
1646 break;
1647 case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1648 c->layer[0].segment_count = tvp->u.data;
1649 break;
1650 case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1651 c->layer[0].interleaving = tvp->u.data;
1652 break;
1653 case DTV_ISDBT_LAYERB_FEC:
1654 c->layer[1].fec = tvp->u.data;
1655 break;
1656 case DTV_ISDBT_LAYERB_MODULATION:
1657 c->layer[1].modulation = tvp->u.data;
1658 break;
1659 case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1660 c->layer[1].segment_count = tvp->u.data;
1661 break;
1662 case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1663 c->layer[1].interleaving = tvp->u.data;
1664 break;
1665 case DTV_ISDBT_LAYERC_FEC:
1666 c->layer[2].fec = tvp->u.data;
1667 break;
1668 case DTV_ISDBT_LAYERC_MODULATION:
1669 c->layer[2].modulation = tvp->u.data;
1670 break;
1671 case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1672 c->layer[2].segment_count = tvp->u.data;
1673 break;
1674 case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1675 c->layer[2].interleaving = tvp->u.data;
1676 break;
1677 case DTV_ISDBS_TS_ID:
1678 c->isdbs_ts_id = tvp->u.data;
1679 break;
1680 case DTV_DVBT2_PLP_ID:
1681 c->dvbt2_plp_id = tvp->u.data;
1682 break;
1683 default:
1684 return -EINVAL;
1685 }
1686
1687 return r;
1688 }
1689
1690 static int dvb_frontend_ioctl(struct file *file,
1691 unsigned int cmd, void *parg)
1692 {
1693 struct dvb_device *dvbdev = file->private_data;
1694 struct dvb_frontend *fe = dvbdev->priv;
1695 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1696 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1697 int err = -EOPNOTSUPP;
1698
1699 dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1700
1701 if (fepriv->exit != DVB_FE_NO_EXIT)
1702 return -ENODEV;
1703
1704 if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1705 (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1706 cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1707 return -EPERM;
1708
1709 if (down_interruptible (&fepriv->sem))
1710 return -ERESTARTSYS;
1711
1712 if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1713 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1714 else {
1715 c->state = DTV_UNDEFINED;
1716 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1717 }
1718
1719 up(&fepriv->sem);
1720 return err;
1721 }
1722
1723 static int dvb_frontend_ioctl_properties(struct file *file,
1724 unsigned int cmd, void *parg)
1725 {
1726 struct dvb_device *dvbdev = file->private_data;
1727 struct dvb_frontend *fe = dvbdev->priv;
1728 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1729 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1730 int err = 0;
1731
1732 struct dtv_properties *tvps = NULL;
1733 struct dtv_property *tvp = NULL;
1734 int i;
1735
1736 dprintk("%s\n", __func__);
1737
1738 if(cmd == FE_SET_PROPERTY) {
1739 tvps = (struct dtv_properties __user *)parg;
1740
1741 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1742 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1743
1744 /* Put an arbitrary limit on the number of messages that can
1745 * be sent at once */
1746 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1747 return -EINVAL;
1748
1749 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1750 if (!tvp) {
1751 err = -ENOMEM;
1752 goto out;
1753 }
1754
1755 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1756 err = -EFAULT;
1757 goto out;
1758 }
1759
1760 for (i = 0; i < tvps->num; i++) {
1761 err = dtv_property_process_set(fe, tvp + i, file);
1762 if (err < 0)
1763 goto out;
1764 (tvp + i)->result = err;
1765 }
1766
1767 if (c->state == DTV_TUNE)
1768 dprintk("%s() Property cache is full, tuning\n", __func__);
1769
1770 } else
1771 if(cmd == FE_GET_PROPERTY) {
1772 tvps = (struct dtv_properties __user *)parg;
1773
1774 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1775 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1776
1777 /* Put an arbitrary limit on the number of messages that can
1778 * be sent at once */
1779 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1780 return -EINVAL;
1781
1782 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1783 if (!tvp) {
1784 err = -ENOMEM;
1785 goto out;
1786 }
1787
1788 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1789 err = -EFAULT;
1790 goto out;
1791 }
1792
1793 /*
1794 * Fills the cache out struct with the cache contents, plus
1795 * the data retrieved from get_frontend, if the frontend
1796 * is not idle. Otherwise, returns the cached content
1797 */
1798 if (fepriv->state != FESTATE_IDLE) {
1799 err = dtv_get_frontend(fe, NULL);
1800 if (err < 0)
1801 goto out;
1802 }
1803 for (i = 0; i < tvps->num; i++) {
1804 err = dtv_property_process_get(fe, c, tvp + i, file);
1805 if (err < 0)
1806 goto out;
1807 (tvp + i)->result = err;
1808 }
1809
1810 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1811 err = -EFAULT;
1812 goto out;
1813 }
1814
1815 } else
1816 err = -EOPNOTSUPP;
1817
1818 out:
1819 kfree(tvp);
1820 return err;
1821 }
1822
1823 static int dtv_set_frontend(struct dvb_frontend *fe)
1824 {
1825 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1826 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1827 struct dvb_frontend_tune_settings fetunesettings;
1828 u32 rolloff = 0;
1829
1830 if (dvb_frontend_check_parameters(fe) < 0)
1831 return -EINVAL;
1832
1833 /*
1834 * Be sure that the bandwidth will be filled for all
1835 * non-satellite systems, as tuners need to know what
1836 * low pass/Nyquist half filter should be applied, in
1837 * order to avoid inter-channel noise.
1838 *
1839 * ISDB-T and DVB-T/T2 already sets bandwidth.
1840 * ATSC and DVB-C don't set, so, the core should fill it.
1841 *
1842 * On DVB-C Annex A and C, the bandwidth is a function of
1843 * the roll-off and symbol rate. Annex B defines different
1844 * roll-off factors depending on the modulation. Fortunately,
1845 * Annex B is only used with 6MHz, so there's no need to
1846 * calculate it.
1847 *
1848 * While not officially supported, a side effect of handling it at
1849 * the cache level is that a program could retrieve the bandwidth
1850 * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1851 */
1852 switch (c->delivery_system) {
1853 case SYS_ATSC:
1854 case SYS_DVBC_ANNEX_B:
1855 c->bandwidth_hz = 6000000;
1856 break;
1857 case SYS_DVBC_ANNEX_A:
1858 rolloff = 115;
1859 break;
1860 case SYS_DVBC_ANNEX_C:
1861 rolloff = 113;
1862 break;
1863 default:
1864 break;
1865 }
1866 if (rolloff)
1867 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
1868
1869 /* force auto frequency inversion if requested */
1870 if (dvb_force_auto_inversion)
1871 c->inversion = INVERSION_AUTO;
1872
1873 /*
1874 * without hierarchical coding code_rate_LP is irrelevant,
1875 * so we tolerate the otherwise invalid FEC_NONE setting
1876 */
1877 if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
1878 c->code_rate_LP = FEC_AUTO;
1879
1880 /* get frontend-specific tuning settings */
1881 memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1882 if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1883 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1884 fepriv->max_drift = fetunesettings.max_drift;
1885 fepriv->step_size = fetunesettings.step_size;
1886 } else {
1887 /* default values */
1888 switch (c->delivery_system) {
1889 case SYS_DVBC_ANNEX_A:
1890 case SYS_DVBC_ANNEX_C:
1891 fepriv->min_delay = HZ / 20;
1892 fepriv->step_size = c->symbol_rate / 16000;
1893 fepriv->max_drift = c->symbol_rate / 2000;
1894 break;
1895 case SYS_DVBT:
1896 case SYS_DVBT2:
1897 case SYS_ISDBT:
1898 case SYS_DMBTH:
1899 fepriv->min_delay = HZ / 20;
1900 fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1901 fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1902 break;
1903 default:
1904 /*
1905 * FIXME: This sounds wrong! if freqency_stepsize is
1906 * defined by the frontend, why not use it???
1907 */
1908 fepriv->min_delay = HZ / 20;
1909 fepriv->step_size = 0; /* no zigzag */
1910 fepriv->max_drift = 0;
1911 break;
1912 }
1913 }
1914 if (dvb_override_tune_delay > 0)
1915 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1916
1917 fepriv->state = FESTATE_RETUNE;
1918
1919 /* Request the search algorithm to search */
1920 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1921
1922 dvb_frontend_clear_events(fe);
1923 dvb_frontend_add_event(fe, 0);
1924 dvb_frontend_wakeup(fe);
1925 fepriv->status = 0;
1926
1927 return 0;
1928 }
1929
1930
1931 static int dvb_frontend_ioctl_legacy(struct file *file,
1932 unsigned int cmd, void *parg)
1933 {
1934 struct dvb_device *dvbdev = file->private_data;
1935 struct dvb_frontend *fe = dvbdev->priv;
1936 struct dvb_frontend_private *fepriv = fe->frontend_priv;
1937 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1938 int cb_err, err = -EOPNOTSUPP;
1939
1940 if (fe->dvb->fe_ioctl_override) {
1941 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1942 DVB_FE_IOCTL_PRE);
1943 if (cb_err < 0)
1944 return cb_err;
1945 if (cb_err > 0)
1946 return 0;
1947 /* fe_ioctl_override returning 0 allows
1948 * dvb-core to continue handling the ioctl */
1949 }
1950
1951 switch (cmd) {
1952 case FE_GET_INFO: {
1953 struct dvb_frontend_info* info = parg;
1954
1955 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1956 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1957
1958 /*
1959 * Associate the 4 delivery systems supported by DVBv3
1960 * API with their DVBv5 counterpart. For the other standards,
1961 * use the closest type, assuming that it would hopefully
1962 * work with a DVBv3 application.
1963 * It should be noticed that, on multi-frontend devices with
1964 * different types (terrestrial and cable, for example),
1965 * a pure DVBv3 application won't be able to use all delivery
1966 * systems. Yet, changing the DVBv5 cache to the other delivery
1967 * system should be enough for making it work.
1968 */
1969 switch (dvbv3_type(c->delivery_system)) {
1970 case DVBV3_QPSK:
1971 info->type = FE_QPSK;
1972 break;
1973 case DVBV3_ATSC:
1974 info->type = FE_ATSC;
1975 break;
1976 case DVBV3_QAM:
1977 info->type = FE_QAM;
1978 break;
1979 case DVBV3_OFDM:
1980 info->type = FE_OFDM;
1981 break;
1982 default:
1983 printk(KERN_ERR
1984 "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1985 __func__, c->delivery_system);
1986 fe->ops.info.type = FE_OFDM;
1987 }
1988 dprintk("current delivery system on cache: %d, V3 type: %d\n",
1989 c->delivery_system, fe->ops.info.type);
1990
1991 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
1992 * do it, it is done for it. */
1993 info->caps |= FE_CAN_INVERSION_AUTO;
1994 err = 0;
1995 break;
1996 }
1997
1998 case FE_READ_STATUS: {
1999 fe_status_t* status = parg;
2000
2001 /* if retune was requested but hasn't occurred yet, prevent
2002 * that user get signal state from previous tuning */
2003 if (fepriv->state == FESTATE_RETUNE ||
2004 fepriv->state == FESTATE_ERROR) {
2005 err=0;
2006 *status = 0;
2007 break;
2008 }
2009
2010 if (fe->ops.read_status)
2011 err = fe->ops.read_status(fe, status);
2012 break;
2013 }
2014 case FE_READ_BER:
2015 if (fe->ops.read_ber)
2016 err = fe->ops.read_ber(fe, (__u32*) parg);
2017 break;
2018
2019 case FE_READ_SIGNAL_STRENGTH:
2020 if (fe->ops.read_signal_strength)
2021 err = fe->ops.read_signal_strength(fe, (__u16*) parg);
2022 break;
2023
2024 case FE_READ_SNR:
2025 if (fe->ops.read_snr)
2026 err = fe->ops.read_snr(fe, (__u16*) parg);
2027 break;
2028
2029 case FE_READ_UNCORRECTED_BLOCKS:
2030 if (fe->ops.read_ucblocks)
2031 err = fe->ops.read_ucblocks(fe, (__u32*) parg);
2032 break;
2033
2034
2035 case FE_DISEQC_RESET_OVERLOAD:
2036 if (fe->ops.diseqc_reset_overload) {
2037 err = fe->ops.diseqc_reset_overload(fe);
2038 fepriv->state = FESTATE_DISEQC;
2039 fepriv->status = 0;
2040 }
2041 break;
2042
2043 case FE_DISEQC_SEND_MASTER_CMD:
2044 if (fe->ops.diseqc_send_master_cmd) {
2045 err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2046 fepriv->state = FESTATE_DISEQC;
2047 fepriv->status = 0;
2048 }
2049 break;
2050
2051 case FE_DISEQC_SEND_BURST:
2052 if (fe->ops.diseqc_send_burst) {
2053 err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2054 fepriv->state = FESTATE_DISEQC;
2055 fepriv->status = 0;
2056 }
2057 break;
2058
2059 case FE_SET_TONE:
2060 if (fe->ops.set_tone) {
2061 err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2062 fepriv->tone = (fe_sec_tone_mode_t) parg;
2063 fepriv->state = FESTATE_DISEQC;
2064 fepriv->status = 0;
2065 }
2066 break;
2067
2068 case FE_SET_VOLTAGE:
2069 if (fe->ops.set_voltage) {
2070 err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2071 fepriv->voltage = (fe_sec_voltage_t) parg;
2072 fepriv->state = FESTATE_DISEQC;
2073 fepriv->status = 0;
2074 }
2075 break;
2076
2077 case FE_DISHNETWORK_SEND_LEGACY_CMD:
2078 if (fe->ops.dishnetwork_send_legacy_command) {
2079 err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2080 fepriv->state = FESTATE_DISEQC;
2081 fepriv->status = 0;
2082 } else if (fe->ops.set_voltage) {
2083 /*
2084 * NOTE: This is a fallback condition. Some frontends
2085 * (stv0299 for instance) take longer than 8msec to
2086 * respond to a set_voltage command. Those switches
2087 * need custom routines to switch properly. For all
2088 * other frontends, the following should work ok.
2089 * Dish network legacy switches (as used by Dish500)
2090 * are controlled by sending 9-bit command words
2091 * spaced 8msec apart.
2092 * the actual command word is switch/port dependent
2093 * so it is up to the userspace application to send
2094 * the right command.
2095 * The command must always start with a '0' after
2096 * initialization, so parg is 8 bits and does not
2097 * include the initialization or start bit
2098 */
2099 unsigned long swcmd = ((unsigned long) parg) << 1;
2100 struct timeval nexttime;
2101 struct timeval tv[10];
2102 int i;
2103 u8 last = 1;
2104 if (dvb_frontend_debug)
2105 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2106 do_gettimeofday(&nexttime);
2107 if (dvb_frontend_debug)
2108 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
2109 /* before sending a command, initialize by sending
2110 * a 32ms 18V to the switch
2111 */
2112 fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2113 dvb_frontend_sleep_until(&nexttime, 32000);
2114
2115 for (i = 0; i < 9; i++) {
2116 if (dvb_frontend_debug)
2117 do_gettimeofday(&tv[i + 1]);
2118 if ((swcmd & 0x01) != last) {
2119 /* set voltage to (last ? 13V : 18V) */
2120 fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2121 last = (last) ? 0 : 1;
2122 }
2123 swcmd = swcmd >> 1;
2124 if (i != 8)
2125 dvb_frontend_sleep_until(&nexttime, 8000);
2126 }
2127 if (dvb_frontend_debug) {
2128 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2129 __func__, fe->dvb->num);
2130 for (i = 1; i < 10; i++)
2131 printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2132 }
2133 err = 0;
2134 fepriv->state = FESTATE_DISEQC;
2135 fepriv->status = 0;
2136 }
2137 break;
2138
2139 case FE_DISEQC_RECV_SLAVE_REPLY:
2140 if (fe->ops.diseqc_recv_slave_reply)
2141 err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2142 break;
2143
2144 case FE_ENABLE_HIGH_LNB_VOLTAGE:
2145 if (fe->ops.enable_high_lnb_voltage)
2146 err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2147 break;
2148
2149 case FE_SET_FRONTEND:
2150 err = set_delivery_system(fe, SYS_UNDEFINED);
2151 if (err)
2152 break;
2153
2154 err = dtv_property_cache_sync(fe, c, parg);
2155 if (err)
2156 break;
2157 err = dtv_set_frontend(fe);
2158 break;
2159 case FE_GET_EVENT:
2160 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2161 break;
2162
2163 case FE_GET_FRONTEND:
2164 err = dtv_get_frontend(fe, parg);
2165 break;
2166
2167 case FE_SET_FRONTEND_TUNE_MODE:
2168 fepriv->tune_mode_flags = (unsigned long) parg;
2169 err = 0;
2170 break;
2171 };
2172
2173 if (fe->dvb->fe_ioctl_override) {
2174 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
2175 DVB_FE_IOCTL_POST);
2176 if (cb_err < 0)
2177 return cb_err;
2178 }
2179
2180 return err;
2181 }
2182
2183
2184 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2185 {
2186 struct dvb_device *dvbdev = file->private_data;
2187 struct dvb_frontend *fe = dvbdev->priv;
2188 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2189
2190 dprintk ("%s\n", __func__);
2191
2192 poll_wait (file, &fepriv->events.wait_queue, wait);
2193
2194 if (fepriv->events.eventw != fepriv->events.eventr)
2195 return (POLLIN | POLLRDNORM | POLLPRI);
2196
2197 return 0;
2198 }
2199
2200 static int dvb_frontend_open(struct inode *inode, struct file *file)
2201 {
2202 struct dvb_device *dvbdev = file->private_data;
2203 struct dvb_frontend *fe = dvbdev->priv;
2204 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2205 struct dvb_adapter *adapter = fe->dvb;
2206 int ret;
2207
2208 dprintk ("%s\n", __func__);
2209 if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2210 return -ENODEV;
2211
2212 if (adapter->mfe_shared) {
2213 mutex_lock (&adapter->mfe_lock);
2214
2215 if (adapter->mfe_dvbdev == NULL)
2216 adapter->mfe_dvbdev = dvbdev;
2217
2218 else if (adapter->mfe_dvbdev != dvbdev) {
2219 struct dvb_device
2220 *mfedev = adapter->mfe_dvbdev;
2221 struct dvb_frontend
2222 *mfe = mfedev->priv;
2223 struct dvb_frontend_private
2224 *mfepriv = mfe->frontend_priv;
2225 int mferetry = (dvb_mfe_wait_time << 1);
2226
2227 mutex_unlock (&adapter->mfe_lock);
2228 while (mferetry-- && (mfedev->users != -1 ||
2229 mfepriv->thread != NULL)) {
2230 if(msleep_interruptible(500)) {
2231 if(signal_pending(current))
2232 return -EINTR;
2233 }
2234 }
2235
2236 mutex_lock (&adapter->mfe_lock);
2237 if(adapter->mfe_dvbdev != dvbdev) {
2238 mfedev = adapter->mfe_dvbdev;
2239 mfe = mfedev->priv;
2240 mfepriv = mfe->frontend_priv;
2241 if (mfedev->users != -1 ||
2242 mfepriv->thread != NULL) {
2243 mutex_unlock (&adapter->mfe_lock);
2244 return -EBUSY;
2245 }
2246 adapter->mfe_dvbdev = dvbdev;
2247 }
2248 }
2249 }
2250
2251 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2252 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2253 goto err0;
2254
2255 /* If we took control of the bus, we need to force
2256 reinitialization. This is because many ts_bus_ctrl()
2257 functions strobe the RESET pin on the demod, and if the
2258 frontend thread already exists then the dvb_init() routine
2259 won't get called (which is what usually does initial
2260 register configuration). */
2261 fepriv->reinitialise = 1;
2262 }
2263
2264 if ((ret = dvb_generic_open (inode, file)) < 0)
2265 goto err1;
2266
2267 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2268 /* normal tune mode when opened R/W */
2269 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2270 fepriv->tone = -1;
2271 fepriv->voltage = -1;
2272
2273 ret = dvb_frontend_start (fe);
2274 if (ret)
2275 goto err2;
2276
2277 /* empty event queue */
2278 fepriv->events.eventr = fepriv->events.eventw = 0;
2279 }
2280
2281 if (adapter->mfe_shared)
2282 mutex_unlock (&adapter->mfe_lock);
2283 return ret;
2284
2285 err2:
2286 dvb_generic_release(inode, file);
2287 err1:
2288 if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2289 fe->ops.ts_bus_ctrl(fe, 0);
2290 err0:
2291 if (adapter->mfe_shared)
2292 mutex_unlock (&adapter->mfe_lock);
2293 return ret;
2294 }
2295
2296 static int dvb_frontend_release(struct inode *inode, struct file *file)
2297 {
2298 struct dvb_device *dvbdev = file->private_data;
2299 struct dvb_frontend *fe = dvbdev->priv;
2300 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2301 int ret;
2302
2303 dprintk ("%s\n", __func__);
2304
2305 if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2306 fepriv->release_jiffies = jiffies;
2307 mb();
2308 }
2309
2310 ret = dvb_generic_release (inode, file);
2311
2312 if (dvbdev->users == -1) {
2313 wake_up(&fepriv->wait_queue);
2314 if (fepriv->exit != DVB_FE_NO_EXIT) {
2315 fops_put(file->f_op);
2316 file->f_op = NULL;
2317 wake_up(&dvbdev->wait_queue);
2318 }
2319 if (fe->ops.ts_bus_ctrl)
2320 fe->ops.ts_bus_ctrl(fe, 0);
2321 }
2322
2323 return ret;
2324 }
2325
2326 static const struct file_operations dvb_frontend_fops = {
2327 .owner = THIS_MODULE,
2328 .unlocked_ioctl = dvb_generic_ioctl,
2329 .poll = dvb_frontend_poll,
2330 .open = dvb_frontend_open,
2331 .release = dvb_frontend_release,
2332 .llseek = noop_llseek,
2333 };
2334
2335 int dvb_register_frontend(struct dvb_adapter* dvb,
2336 struct dvb_frontend* fe)
2337 {
2338 struct dvb_frontend_private *fepriv;
2339 static const struct dvb_device dvbdev_template = {
2340 .users = ~0,
2341 .writers = 1,
2342 .readers = (~0)-1,
2343 .fops = &dvb_frontend_fops,
2344 .kernel_ioctl = dvb_frontend_ioctl
2345 };
2346
2347 dprintk ("%s\n", __func__);
2348
2349 if (mutex_lock_interruptible(&frontend_mutex))
2350 return -ERESTARTSYS;
2351
2352 fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2353 if (fe->frontend_priv == NULL) {
2354 mutex_unlock(&frontend_mutex);
2355 return -ENOMEM;
2356 }
2357 fepriv = fe->frontend_priv;
2358
2359 sema_init(&fepriv->sem, 1);
2360 init_waitqueue_head (&fepriv->wait_queue);
2361 init_waitqueue_head (&fepriv->events.wait_queue);
2362 mutex_init(&fepriv->events.mtx);
2363 fe->dvb = dvb;
2364 fepriv->inversion = INVERSION_OFF;
2365
2366 printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2367 fe->dvb->num,
2368 fe->id,
2369 fe->ops.info.name);
2370
2371 dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2372 fe, DVB_DEVICE_FRONTEND);
2373
2374 /*
2375 * Initialize the cache to the proper values according with the
2376 * first supported delivery system (ops->delsys[0])
2377 */
2378
2379 fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2380 dvb_frontend_clear_cache(fe);
2381
2382 mutex_unlock(&frontend_mutex);
2383 return 0;
2384 }
2385 EXPORT_SYMBOL(dvb_register_frontend);
2386
2387 int dvb_unregister_frontend(struct dvb_frontend* fe)
2388 {
2389 struct dvb_frontend_private *fepriv = fe->frontend_priv;
2390 dprintk ("%s\n", __func__);
2391
2392 mutex_lock(&frontend_mutex);
2393 dvb_frontend_stop (fe);
2394 mutex_unlock(&frontend_mutex);
2395
2396 if (fepriv->dvbdev->users < -1)
2397 wait_event(fepriv->dvbdev->wait_queue,
2398 fepriv->dvbdev->users==-1);
2399
2400 mutex_lock(&frontend_mutex);
2401 dvb_unregister_device (fepriv->dvbdev);
2402
2403 /* fe is invalid now */
2404 kfree(fepriv);
2405 mutex_unlock(&frontend_mutex);
2406 return 0;
2407 }
2408 EXPORT_SYMBOL(dvb_unregister_frontend);
2409
2410 #ifdef CONFIG_MEDIA_ATTACH
2411 void dvb_frontend_detach(struct dvb_frontend* fe)
2412 {
2413 void *ptr;
2414
2415 if (fe->ops.release_sec) {
2416 fe->ops.release_sec(fe);
2417 symbol_put_addr(fe->ops.release_sec);
2418 }
2419 if (fe->ops.tuner_ops.release) {
2420 fe->ops.tuner_ops.release(fe);
2421 symbol_put_addr(fe->ops.tuner_ops.release);
2422 }
2423 if (fe->ops.analog_ops.release) {
2424 fe->ops.analog_ops.release(fe);
2425 symbol_put_addr(fe->ops.analog_ops.release);
2426 }
2427 ptr = (void*)fe->ops.release;
2428 if (ptr) {
2429 fe->ops.release(fe);
2430 symbol_put_addr(ptr);
2431 }
2432 }
2433 #else
2434 void dvb_frontend_detach(struct dvb_frontend* fe)
2435 {
2436 if (fe->ops.release_sec)
2437 fe->ops.release_sec(fe);
2438 if (fe->ops.tuner_ops.release)
2439 fe->ops.tuner_ops.release(fe);
2440 if (fe->ops.analog_ops.release)
2441 fe->ops.analog_ops.release(fe);
2442 if (fe->ops.release)
2443 fe->ops.release(fe);
2444 }
2445 #endif
2446 EXPORT_SYMBOL(dvb_frontend_detach);