Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[linux-2.6.git] / drivers / media / dvb / dvb-core / dvb_frontend.c
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 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
147                                            struct dvb_frontend_parameters *p);
148
149 static bool has_get_frontend(struct dvb_frontend *fe)
150 {
151         return fe->ops.get_frontend != NULL;
152 }
153
154 /*
155  * Due to DVBv3 API calls, a delivery system should be mapped into one of
156  * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
157  * otherwise, a DVBv3 call will fail.
158  */
159 enum dvbv3_emulation_type {
160         DVBV3_UNKNOWN,
161         DVBV3_QPSK,
162         DVBV3_QAM,
163         DVBV3_OFDM,
164         DVBV3_ATSC,
165 };
166
167 static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
168 {
169         switch (delivery_system) {
170         case SYS_DVBC_ANNEX_A:
171         case SYS_DVBC_ANNEX_C:
172                 return DVBV3_QAM;
173         case SYS_DVBS:
174         case SYS_DVBS2:
175         case SYS_TURBO:
176         case SYS_ISDBS:
177         case SYS_DSS:
178                 return DVBV3_QPSK;
179         case SYS_DVBT:
180         case SYS_DVBT2:
181         case SYS_ISDBT:
182         case SYS_DMBTH:
183                 return DVBV3_OFDM;
184         case SYS_ATSC:
185         case SYS_DVBC_ANNEX_B:
186                 return DVBV3_ATSC;
187         case SYS_UNDEFINED:
188         case SYS_ISDBC:
189         case SYS_DVBH:
190         case SYS_DAB:
191         case SYS_ATSCMH:
192         default:
193                 /*
194                  * Doesn't know how to emulate those types and/or
195                  * there's no frontend driver from this type yet
196                  * with some emulation code, so, we're not sure yet how
197                  * to handle them, or they're not compatible with a DVBv3 call.
198                  */
199                 return DVBV3_UNKNOWN;
200         }
201 }
202
203 static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
204 {
205         struct dvb_frontend_private *fepriv = fe->frontend_priv;
206         struct dvb_fe_events *events = &fepriv->events;
207         struct dvb_frontend_event *e;
208         int wp;
209
210         dprintk ("%s\n", __func__);
211
212         if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
213                 dtv_get_frontend(fe, &fepriv->parameters_out);
214
215         mutex_lock(&events->mtx);
216
217         wp = (events->eventw + 1) % MAX_EVENT;
218         if (wp == events->eventr) {
219                 events->overflow = 1;
220                 events->eventr = (events->eventr + 1) % MAX_EVENT;
221         }
222
223         e = &events->events[events->eventw];
224         e->status = status;
225         e->parameters = fepriv->parameters_out;
226
227         events->eventw = wp;
228
229         mutex_unlock(&events->mtx);
230
231         wake_up_interruptible (&events->wait_queue);
232 }
233
234 static int dvb_frontend_get_event(struct dvb_frontend *fe,
235                             struct dvb_frontend_event *event, int flags)
236 {
237         struct dvb_frontend_private *fepriv = fe->frontend_priv;
238         struct dvb_fe_events *events = &fepriv->events;
239
240         dprintk ("%s\n", __func__);
241
242         if (events->overflow) {
243                 events->overflow = 0;
244                 return -EOVERFLOW;
245         }
246
247         if (events->eventw == events->eventr) {
248                 int ret;
249
250                 if (flags & O_NONBLOCK)
251                         return -EWOULDBLOCK;
252
253                 up(&fepriv->sem);
254
255                 ret = wait_event_interruptible (events->wait_queue,
256                                                 events->eventw != events->eventr);
257
258                 if (down_interruptible (&fepriv->sem))
259                         return -ERESTARTSYS;
260
261                 if (ret < 0)
262                         return ret;
263         }
264
265         mutex_lock(&events->mtx);
266         *event = events->events[events->eventr];
267         events->eventr = (events->eventr + 1) % MAX_EVENT;
268         mutex_unlock(&events->mtx);
269
270         return 0;
271 }
272
273 static void dvb_frontend_clear_events(struct dvb_frontend *fe)
274 {
275         struct dvb_frontend_private *fepriv = fe->frontend_priv;
276         struct dvb_fe_events *events = &fepriv->events;
277
278         mutex_lock(&events->mtx);
279         events->eventr = events->eventw;
280         mutex_unlock(&events->mtx);
281 }
282
283 static void dvb_frontend_init(struct dvb_frontend *fe)
284 {
285         dprintk ("DVB: initialising adapter %i frontend %i (%s)...\n",
286                  fe->dvb->num,
287                  fe->id,
288                  fe->ops.info.name);
289
290         if (fe->ops.init)
291                 fe->ops.init(fe);
292         if (fe->ops.tuner_ops.init) {
293                 if (fe->ops.i2c_gate_ctrl)
294                         fe->ops.i2c_gate_ctrl(fe, 1);
295                 fe->ops.tuner_ops.init(fe);
296                 if (fe->ops.i2c_gate_ctrl)
297                         fe->ops.i2c_gate_ctrl(fe, 0);
298         }
299 }
300
301 void dvb_frontend_reinitialise(struct dvb_frontend *fe)
302 {
303         struct dvb_frontend_private *fepriv = fe->frontend_priv;
304
305         fepriv->reinitialise = 1;
306         dvb_frontend_wakeup(fe);
307 }
308 EXPORT_SYMBOL(dvb_frontend_reinitialise);
309
310 static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
311 {
312         int q2;
313
314         dprintk ("%s\n", __func__);
315
316         if (locked)
317                 (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
318         else
319                 (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
320
321         q2 = fepriv->quality - 128;
322         q2 *= q2;
323
324         fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
325 }
326
327 /**
328  * Performs automatic twiddling of frontend parameters.
329  *
330  * @param fe The frontend concerned.
331  * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
332  * @returns Number of complete iterations that have been performed.
333  */
334 static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
335 {
336         int autoinversion;
337         int ready = 0;
338         int fe_set_err = 0;
339         struct dvb_frontend_private *fepriv = fe->frontend_priv;
340         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
341         int original_inversion = c->inversion;
342         u32 original_frequency = c->frequency;
343
344         /* are we using autoinversion? */
345         autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
346                          (c->inversion == INVERSION_AUTO));
347
348         /* setup parameters correctly */
349         while(!ready) {
350                 /* calculate the lnb_drift */
351                 fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
352
353                 /* wrap the auto_step if we've exceeded the maximum drift */
354                 if (fepriv->lnb_drift > fepriv->max_drift) {
355                         fepriv->auto_step = 0;
356                         fepriv->auto_sub_step = 0;
357                         fepriv->lnb_drift = 0;
358                 }
359
360                 /* perform inversion and +/- zigzag */
361                 switch(fepriv->auto_sub_step) {
362                 case 0:
363                         /* try with the current inversion and current drift setting */
364                         ready = 1;
365                         break;
366
367                 case 1:
368                         if (!autoinversion) break;
369
370                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
371                         ready = 1;
372                         break;
373
374                 case 2:
375                         if (fepriv->lnb_drift == 0) break;
376
377                         fepriv->lnb_drift = -fepriv->lnb_drift;
378                         ready = 1;
379                         break;
380
381                 case 3:
382                         if (fepriv->lnb_drift == 0) break;
383                         if (!autoinversion) break;
384
385                         fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
386                         fepriv->lnb_drift = -fepriv->lnb_drift;
387                         ready = 1;
388                         break;
389
390                 default:
391                         fepriv->auto_step++;
392                         fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
393                         break;
394                 }
395
396                 if (!ready) fepriv->auto_sub_step++;
397         }
398
399         /* if this attempt would hit where we started, indicate a complete
400          * iteration has occurred */
401         if ((fepriv->auto_step == fepriv->started_auto_step) &&
402             (fepriv->auto_sub_step == 0) && check_wrapped) {
403                 return 1;
404         }
405
406         dprintk("%s: drift:%i inversion:%i auto_step:%i "
407                 "auto_sub_step:%i started_auto_step:%i\n",
408                 __func__, fepriv->lnb_drift, fepriv->inversion,
409                 fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
410
411         /* set the frontend itself */
412         c->frequency += fepriv->lnb_drift;
413         if (autoinversion)
414                 c->inversion = fepriv->inversion;
415         tmp = *c;
416         if (fe->ops.set_frontend)
417                 fe_set_err = fe->ops.set_frontend(fe);
418         *c = tmp;
419         if (fe_set_err < 0) {
420                 fepriv->state = FESTATE_ERROR;
421                 return fe_set_err;
422         }
423
424         c->frequency = original_frequency;
425         c->inversion = original_inversion;
426
427         fepriv->auto_sub_step++;
428         return 0;
429 }
430
431 static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
432 {
433         fe_status_t s = 0;
434         int retval = 0;
435         struct dvb_frontend_private *fepriv = fe->frontend_priv;
436         struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
437
438         /* if we've got no parameters, just keep idling */
439         if (fepriv->state & FESTATE_IDLE) {
440                 fepriv->delay = 3*HZ;
441                 fepriv->quality = 0;
442                 return;
443         }
444
445         /* in SCAN mode, we just set the frontend when asked and leave it alone */
446         if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
447                 if (fepriv->state & FESTATE_RETUNE) {
448                         tmp = *c;
449                         if (fe->ops.set_frontend)
450                                 retval = fe->ops.set_frontend(fe);
451                         *c = tmp;
452                         if (retval < 0)
453                                 fepriv->state = FESTATE_ERROR;
454                         else
455                                 fepriv->state = FESTATE_TUNED;
456                 }
457                 fepriv->delay = 3*HZ;
458                 fepriv->quality = 0;
459                 return;
460         }
461
462         /* get the frontend status */
463         if (fepriv->state & FESTATE_RETUNE) {
464                 s = 0;
465         } else {
466                 if (fe->ops.read_status)
467                         fe->ops.read_status(fe, &s);
468                 if (s != fepriv->status) {
469                         dvb_frontend_add_event(fe, s);
470                         fepriv->status = s;
471                 }
472         }
473
474         /* if we're not tuned, and we have a lock, move to the TUNED state */
475         if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
476                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
477                 fepriv->state = FESTATE_TUNED;
478
479                 /* if we're tuned, then we have determined the correct inversion */
480                 if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
481                     (c->inversion == INVERSION_AUTO)) {
482                         c->inversion = fepriv->inversion;
483                 }
484                 return;
485         }
486
487         /* if we are tuned already, check we're still locked */
488         if (fepriv->state & FESTATE_TUNED) {
489                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
490
491                 /* we're tuned, and the lock is still good... */
492                 if (s & FE_HAS_LOCK) {
493                         return;
494                 } else { /* if we _WERE_ tuned, but now don't have a lock */
495                         fepriv->state = FESTATE_ZIGZAG_FAST;
496                         fepriv->started_auto_step = fepriv->auto_step;
497                         fepriv->check_wrapped = 0;
498                 }
499         }
500
501         /* don't actually do anything if we're in the LOSTLOCK state,
502          * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
503         if ((fepriv->state & FESTATE_LOSTLOCK) &&
504             (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
505                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
506                 return;
507         }
508
509         /* don't do anything if we're in the DISEQC state, since this
510          * might be someone with a motorized dish controlled by DISEQC.
511          * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
512         if (fepriv->state & FESTATE_DISEQC) {
513                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
514                 return;
515         }
516
517         /* if we're in the RETUNE state, set everything up for a brand
518          * new scan, keeping the current inversion setting, as the next
519          * tune is _very_ likely to require the same */
520         if (fepriv->state & FESTATE_RETUNE) {
521                 fepriv->lnb_drift = 0;
522                 fepriv->auto_step = 0;
523                 fepriv->auto_sub_step = 0;
524                 fepriv->started_auto_step = 0;
525                 fepriv->check_wrapped = 0;
526         }
527
528         /* fast zigzag. */
529         if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
530                 fepriv->delay = fepriv->min_delay;
531
532                 /* perform a tune */
533                 retval = dvb_frontend_swzigzag_autotune(fe,
534                                                         fepriv->check_wrapped);
535                 if (retval < 0) {
536                         return;
537                 } else if (retval) {
538                         /* OK, if we've run out of trials at the fast speed.
539                          * Drop back to slow for the _next_ attempt */
540                         fepriv->state = FESTATE_SEARCHING_SLOW;
541                         fepriv->started_auto_step = fepriv->auto_step;
542                         return;
543                 }
544                 fepriv->check_wrapped = 1;
545
546                 /* if we've just retuned, enter the ZIGZAG_FAST state.
547                  * This ensures we cannot return from an
548                  * FE_SET_FRONTEND ioctl before the first frontend tune
549                  * occurs */
550                 if (fepriv->state & FESTATE_RETUNE) {
551                         fepriv->state = FESTATE_TUNING_FAST;
552                 }
553         }
554
555         /* slow zigzag */
556         if (fepriv->state & FESTATE_SEARCHING_SLOW) {
557                 dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
558
559                 /* Note: don't bother checking for wrapping; we stay in this
560                  * state until we get a lock */
561                 dvb_frontend_swzigzag_autotune(fe, 0);
562         }
563 }
564
565 static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
566 {
567         struct dvb_frontend_private *fepriv = fe->frontend_priv;
568
569         if (fepriv->exit != DVB_FE_NO_EXIT)
570                 return 1;
571
572         if (fepriv->dvbdev->writers == 1)
573                 if (time_after_eq(jiffies, fepriv->release_jiffies +
574                                   dvb_shutdown_timeout * HZ))
575                         return 1;
576
577         return 0;
578 }
579
580 static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
581 {
582         struct dvb_frontend_private *fepriv = fe->frontend_priv;
583
584         if (fepriv->wakeup) {
585                 fepriv->wakeup = 0;
586                 return 1;
587         }
588         return dvb_frontend_is_exiting(fe);
589 }
590
591 static void dvb_frontend_wakeup(struct dvb_frontend *fe)
592 {
593         struct dvb_frontend_private *fepriv = fe->frontend_priv;
594
595         fepriv->wakeup = 1;
596         wake_up_interruptible(&fepriv->wait_queue);
597 }
598
599 static int dvb_frontend_thread(void *data)
600 {
601         struct dvb_frontend *fe = data;
602         struct dvb_frontend_private *fepriv = fe->frontend_priv;
603         fe_status_t s;
604         enum dvbfe_algo algo;
605
606         bool re_tune = false;
607
608         dprintk("%s\n", __func__);
609
610         fepriv->check_wrapped = 0;
611         fepriv->quality = 0;
612         fepriv->delay = 3*HZ;
613         fepriv->status = 0;
614         fepriv->wakeup = 0;
615         fepriv->reinitialise = 0;
616
617         dvb_frontend_init(fe);
618
619         set_freezable();
620         while (1) {
621                 up(&fepriv->sem);           /* is locked when we enter the thread... */
622 restart:
623                 wait_event_interruptible_timeout(fepriv->wait_queue,
624                         dvb_frontend_should_wakeup(fe) || kthread_should_stop()
625                                 || freezing(current),
626                         fepriv->delay);
627
628                 if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
629                         /* got signal or quitting */
630                         fepriv->exit = DVB_FE_NORMAL_EXIT;
631                         break;
632                 }
633
634                 if (try_to_freeze())
635                         goto restart;
636
637                 if (down_interruptible(&fepriv->sem))
638                         break;
639
640                 if (fepriv->reinitialise) {
641                         dvb_frontend_init(fe);
642                         if (fe->ops.set_tone && fepriv->tone != -1)
643                                 fe->ops.set_tone(fe, fepriv->tone);
644                         if (fe->ops.set_voltage && fepriv->voltage != -1)
645                                 fe->ops.set_voltage(fe, fepriv->voltage);
646                         fepriv->reinitialise = 0;
647                 }
648
649                 /* do an iteration of the tuning loop */
650                 if (fe->ops.get_frontend_algo) {
651                         algo = fe->ops.get_frontend_algo(fe);
652                         switch (algo) {
653                         case DVBFE_ALGO_HW:
654                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__);
655
656                                 if (fepriv->state & FESTATE_RETUNE) {
657                                         dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__);
658                                         re_tune = true;
659                                         fepriv->state = FESTATE_TUNED;
660                                 } else {
661                                         re_tune = false;
662                                 }
663
664                                 if (fe->ops.tune)
665                                         fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s);
666
667                                 if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
668                                         dprintk("%s: state changed, adding current state\n", __func__);
669                                         dvb_frontend_add_event(fe, s);
670                                         fepriv->status = s;
671                                 }
672                                 break;
673                         case DVBFE_ALGO_SW:
674                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__);
675                                 dvb_frontend_swzigzag(fe);
676                                 break;
677                         case DVBFE_ALGO_CUSTOM:
678                                 dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state);
679                                 if (fepriv->state & FESTATE_RETUNE) {
680                                         dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__);
681                                         fepriv->state = FESTATE_TUNED;
682                                 }
683                                 /* Case where we are going to search for a carrier
684                                  * User asked us to retune again for some reason, possibly
685                                  * requesting a search with a new set of parameters
686                                  */
687                                 if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) {
688                                         if (fe->ops.search) {
689                                                 fepriv->algo_status = fe->ops.search(fe);
690                                                 /* We did do a search as was requested, the flags are
691                                                  * now unset as well and has the flags wrt to search.
692                                                  */
693                                         } else {
694                                                 fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN;
695                                         }
696                                 }
697                                 /* Track the carrier if the search was successful */
698                                 if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) {
699                                         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
700                                         fepriv->delay = HZ / 2;
701                                 }
702                                 dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
703                                 fe->ops.read_status(fe, &s);
704                                 if (s != fepriv->status) {
705                                         dvb_frontend_add_event(fe, s); /* update event list */
706                                         fepriv->status = s;
707                                         if (!(s & FE_HAS_LOCK)) {
708                                                 fepriv->delay = HZ / 10;
709                                                 fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
710                                         } else {
711                                                 fepriv->delay = 60 * HZ;
712                                         }
713                                 }
714                                 break;
715                         default:
716                                 dprintk("%s: UNDEFINED ALGO !\n", __func__);
717                                 break;
718                         }
719                 } else {
720                         dvb_frontend_swzigzag(fe);
721                 }
722         }
723
724         if (dvb_powerdown_on_sleep) {
725                 if (fe->ops.set_voltage)
726                         fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
727                 if (fe->ops.tuner_ops.sleep) {
728                         if (fe->ops.i2c_gate_ctrl)
729                                 fe->ops.i2c_gate_ctrl(fe, 1);
730                         fe->ops.tuner_ops.sleep(fe);
731                         if (fe->ops.i2c_gate_ctrl)
732                                 fe->ops.i2c_gate_ctrl(fe, 0);
733                 }
734                 if (fe->ops.sleep)
735                         fe->ops.sleep(fe);
736         }
737
738         fepriv->thread = NULL;
739         if (kthread_should_stop())
740                 fepriv->exit = DVB_FE_DEVICE_REMOVED;
741         else
742                 fepriv->exit = DVB_FE_NO_EXIT;
743         mb();
744
745         dvb_frontend_wakeup(fe);
746         return 0;
747 }
748
749 static void dvb_frontend_stop(struct dvb_frontend *fe)
750 {
751         struct dvb_frontend_private *fepriv = fe->frontend_priv;
752
753         dprintk ("%s\n", __func__);
754
755         fepriv->exit = DVB_FE_NORMAL_EXIT;
756         mb();
757
758         if (!fepriv->thread)
759                 return;
760
761         kthread_stop(fepriv->thread);
762
763         sema_init(&fepriv->sem, 1);
764         fepriv->state = FESTATE_IDLE;
765
766         /* paranoia check in case a signal arrived */
767         if (fepriv->thread)
768                 printk("dvb_frontend_stop: warning: thread %p won't exit\n",
769                                 fepriv->thread);
770 }
771
772 s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
773 {
774         return ((curtime.tv_usec < lasttime.tv_usec) ?
775                 1000000 - lasttime.tv_usec + curtime.tv_usec :
776                 curtime.tv_usec - lasttime.tv_usec);
777 }
778 EXPORT_SYMBOL(timeval_usec_diff);
779
780 static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
781 {
782         curtime->tv_usec += add_usec;
783         if (curtime->tv_usec >= 1000000) {
784                 curtime->tv_usec -= 1000000;
785                 curtime->tv_sec++;
786         }
787 }
788
789 /*
790  * Sleep until gettimeofday() > waketime + add_usec
791  * This needs to be as precise as possible, but as the delay is
792  * usually between 2ms and 32ms, it is done using a scheduled msleep
793  * followed by usleep (normally a busy-wait loop) for the remainder
794  */
795 void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
796 {
797         struct timeval lasttime;
798         s32 delta, newdelta;
799
800         timeval_usec_add(waketime, add_usec);
801
802         do_gettimeofday(&lasttime);
803         delta = timeval_usec_diff(lasttime, *waketime);
804         if (delta > 2500) {
805                 msleep((delta - 1500) / 1000);
806                 do_gettimeofday(&lasttime);
807                 newdelta = timeval_usec_diff(lasttime, *waketime);
808                 delta = (newdelta > delta) ? 0 : newdelta;
809         }
810         if (delta > 0)
811                 udelay(delta);
812 }
813 EXPORT_SYMBOL(dvb_frontend_sleep_until);
814
815 static int dvb_frontend_start(struct dvb_frontend *fe)
816 {
817         int ret;
818         struct dvb_frontend_private *fepriv = fe->frontend_priv;
819         struct task_struct *fe_thread;
820
821         dprintk ("%s\n", __func__);
822
823         if (fepriv->thread) {
824                 if (fepriv->exit == DVB_FE_NO_EXIT)
825                         return 0;
826                 else
827                         dvb_frontend_stop (fe);
828         }
829
830         if (signal_pending(current))
831                 return -EINTR;
832         if (down_interruptible (&fepriv->sem))
833                 return -EINTR;
834
835         fepriv->state = FESTATE_IDLE;
836         fepriv->exit = DVB_FE_NO_EXIT;
837         fepriv->thread = NULL;
838         mb();
839
840         fe_thread = kthread_run(dvb_frontend_thread, fe,
841                 "kdvb-ad-%i-fe-%i", fe->dvb->num,fe->id);
842         if (IS_ERR(fe_thread)) {
843                 ret = PTR_ERR(fe_thread);
844                 printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
845                 up(&fepriv->sem);
846                 return ret;
847         }
848         fepriv->thread = fe_thread;
849         return 0;
850 }
851
852 static void dvb_frontend_get_frequency_limits(struct dvb_frontend *fe,
853                                         u32 *freq_min, u32 *freq_max)
854 {
855         *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
856
857         if (fe->ops.info.frequency_max == 0)
858                 *freq_max = fe->ops.tuner_ops.info.frequency_max;
859         else if (fe->ops.tuner_ops.info.frequency_max == 0)
860                 *freq_max = fe->ops.info.frequency_max;
861         else
862                 *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
863
864         if (*freq_min == 0 || *freq_max == 0)
865                 printk(KERN_WARNING "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
866                        fe->dvb->num,fe->id);
867 }
868
869 static int dvb_frontend_check_parameters(struct dvb_frontend *fe)
870 {
871         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
872         u32 freq_min;
873         u32 freq_max;
874
875         /* range check: frequency */
876         dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max);
877         if ((freq_min && c->frequency < freq_min) ||
878             (freq_max && c->frequency > freq_max)) {
879                 printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n",
880                        fe->dvb->num, fe->id, c->frequency, freq_min, freq_max);
881                 return -EINVAL;
882         }
883
884         /* range check: symbol rate */
885         switch (c->delivery_system) {
886         case SYS_DVBS:
887         case SYS_DVBS2:
888         case SYS_TURBO:
889         case SYS_DVBC_ANNEX_A:
890         case SYS_DVBC_ANNEX_C:
891                 if ((fe->ops.info.symbol_rate_min &&
892                      c->symbol_rate < fe->ops.info.symbol_rate_min) ||
893                     (fe->ops.info.symbol_rate_max &&
894                      c->symbol_rate > fe->ops.info.symbol_rate_max)) {
895                         printk(KERN_WARNING "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n",
896                                fe->dvb->num, fe->id, c->symbol_rate,
897                                fe->ops.info.symbol_rate_min,
898                                fe->ops.info.symbol_rate_max);
899                         return -EINVAL;
900                 }
901         default:
902                 break;
903         }
904
905         return 0;
906 }
907
908 static int dvb_frontend_clear_cache(struct dvb_frontend *fe)
909 {
910         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
911         int i;
912         u32 delsys;
913
914         delsys = c->delivery_system;
915         memset(c, 0, sizeof(struct dtv_frontend_properties));
916         c->delivery_system = delsys;
917
918         c->state = DTV_CLEAR;
919
920         dprintk("%s() Clearing cache for delivery system %d\n", __func__,
921                 c->delivery_system);
922
923         c->transmission_mode = TRANSMISSION_MODE_AUTO;
924         c->bandwidth_hz = 0;    /* AUTO */
925         c->guard_interval = GUARD_INTERVAL_AUTO;
926         c->hierarchy = HIERARCHY_AUTO;
927         c->symbol_rate = 0;
928         c->code_rate_HP = FEC_AUTO;
929         c->code_rate_LP = FEC_AUTO;
930         c->fec_inner = FEC_AUTO;
931         c->rolloff = ROLLOFF_AUTO;
932         c->voltage = SEC_VOLTAGE_OFF;
933         c->sectone = SEC_TONE_OFF;
934         c->pilot = PILOT_AUTO;
935
936         c->isdbt_partial_reception = 0;
937         c->isdbt_sb_mode = 0;
938         c->isdbt_sb_subchannel = 0;
939         c->isdbt_sb_segment_idx = 0;
940         c->isdbt_sb_segment_count = 0;
941         c->isdbt_layer_enabled = 0;
942         for (i = 0; i < 3; i++) {
943                 c->layer[i].fec = FEC_AUTO;
944                 c->layer[i].modulation = QAM_AUTO;
945                 c->layer[i].interleaving = 0;
946                 c->layer[i].segment_count = 0;
947         }
948
949         c->isdbs_ts_id = 0;
950         c->dvbt2_plp_id = 0;
951
952         switch (c->delivery_system) {
953         case SYS_DVBS:
954         case SYS_DVBS2:
955         case SYS_TURBO:
956                 c->modulation = QPSK;   /* implied for DVB-S in legacy API */
957                 c->rolloff = ROLLOFF_35;/* implied for DVB-S */
958                 break;
959         case SYS_ATSC:
960                 c->modulation = VSB_8;
961                 break;
962         default:
963                 c->modulation = QAM_AUTO;
964                 break;
965         }
966
967         return 0;
968 }
969
970 #define _DTV_CMD(n, s, b) \
971 [n] = { \
972         .name = #n, \
973         .cmd  = n, \
974         .set  = s,\
975         .buffer = b \
976 }
977
978 static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = {
979         _DTV_CMD(DTV_TUNE, 1, 0),
980         _DTV_CMD(DTV_CLEAR, 1, 0),
981
982         /* Set */
983         _DTV_CMD(DTV_FREQUENCY, 1, 0),
984         _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0),
985         _DTV_CMD(DTV_MODULATION, 1, 0),
986         _DTV_CMD(DTV_INVERSION, 1, 0),
987         _DTV_CMD(DTV_DISEQC_MASTER, 1, 1),
988         _DTV_CMD(DTV_SYMBOL_RATE, 1, 0),
989         _DTV_CMD(DTV_INNER_FEC, 1, 0),
990         _DTV_CMD(DTV_VOLTAGE, 1, 0),
991         _DTV_CMD(DTV_TONE, 1, 0),
992         _DTV_CMD(DTV_PILOT, 1, 0),
993         _DTV_CMD(DTV_ROLLOFF, 1, 0),
994         _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0),
995         _DTV_CMD(DTV_HIERARCHY, 1, 0),
996         _DTV_CMD(DTV_CODE_RATE_HP, 1, 0),
997         _DTV_CMD(DTV_CODE_RATE_LP, 1, 0),
998         _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0),
999         _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0),
1000
1001         _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0),
1002         _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0),
1003         _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0),
1004         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0),
1005         _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0),
1006         _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0),
1007         _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0),
1008         _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0),
1009         _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0),
1010         _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0),
1011         _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0),
1012         _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0),
1013         _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0),
1014         _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0),
1015         _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0),
1016         _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0),
1017         _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0),
1018         _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0),
1019
1020         _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0),
1021         _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0),
1022
1023         /* Get */
1024         _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1),
1025         _DTV_CMD(DTV_API_VERSION, 0, 0),
1026         _DTV_CMD(DTV_CODE_RATE_HP, 0, 0),
1027         _DTV_CMD(DTV_CODE_RATE_LP, 0, 0),
1028         _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0),
1029         _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0),
1030         _DTV_CMD(DTV_HIERARCHY, 0, 0),
1031
1032         _DTV_CMD(DTV_ENUM_DELSYS, 0, 0),
1033 };
1034
1035 static void dtv_property_dump(struct dtv_property *tvp)
1036 {
1037         int i;
1038
1039         if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) {
1040                 printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n",
1041                         __func__, tvp->cmd);
1042                 return;
1043         }
1044
1045         dprintk("%s() tvp.cmd    = 0x%08x (%s)\n"
1046                 ,__func__
1047                 ,tvp->cmd
1048                 ,dtv_cmds[ tvp->cmd ].name);
1049
1050         if(dtv_cmds[ tvp->cmd ].buffer) {
1051
1052                 dprintk("%s() tvp.u.buffer.len = 0x%02x\n"
1053                         ,__func__
1054                         ,tvp->u.buffer.len);
1055
1056                 for(i = 0; i < tvp->u.buffer.len; i++)
1057                         dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
1058                                 ,__func__
1059                                 ,i
1060                                 ,tvp->u.buffer.data[i]);
1061
1062         } else
1063                 dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data);
1064 }
1065
1066 /* Synchronise the legacy tuning parameters into the cache, so that demodulator
1067  * drivers can use a single set_frontend tuning function, regardless of whether
1068  * it's being used for the legacy or new API, reducing code and complexity.
1069  */
1070 static int dtv_property_cache_sync(struct dvb_frontend *fe,
1071                                    struct dtv_frontend_properties *c,
1072                                    const struct dvb_frontend_parameters *p)
1073 {
1074         c->frequency = p->frequency;
1075         c->inversion = p->inversion;
1076
1077         switch (dvbv3_type(c->delivery_system)) {
1078         case DVBV3_QPSK:
1079                 dprintk("%s() Preparing QPSK req\n", __func__);
1080                 c->symbol_rate = p->u.qpsk.symbol_rate;
1081                 c->fec_inner = p->u.qpsk.fec_inner;
1082                 break;
1083         case DVBV3_QAM:
1084                 dprintk("%s() Preparing QAM req\n", __func__);
1085                 c->symbol_rate = p->u.qam.symbol_rate;
1086                 c->fec_inner = p->u.qam.fec_inner;
1087                 c->modulation = p->u.qam.modulation;
1088                 break;
1089         case DVBV3_OFDM:
1090                 dprintk("%s() Preparing OFDM req\n", __func__);
1091                 switch (p->u.ofdm.bandwidth) {
1092                 case BANDWIDTH_10_MHZ:
1093                         c->bandwidth_hz = 10000000;
1094                         break;
1095                 case BANDWIDTH_8_MHZ:
1096                         c->bandwidth_hz = 8000000;
1097                         break;
1098                 case BANDWIDTH_7_MHZ:
1099                         c->bandwidth_hz = 7000000;
1100                         break;
1101                 case BANDWIDTH_6_MHZ:
1102                         c->bandwidth_hz = 6000000;
1103                         break;
1104                 case BANDWIDTH_5_MHZ:
1105                         c->bandwidth_hz = 5000000;
1106                         break;
1107                 case BANDWIDTH_1_712_MHZ:
1108                         c->bandwidth_hz = 1712000;
1109                         break;
1110                 case BANDWIDTH_AUTO:
1111                         c->bandwidth_hz = 0;
1112                 }
1113
1114                 c->code_rate_HP = p->u.ofdm.code_rate_HP;
1115                 c->code_rate_LP = p->u.ofdm.code_rate_LP;
1116                 c->modulation = p->u.ofdm.constellation;
1117                 c->transmission_mode = p->u.ofdm.transmission_mode;
1118                 c->guard_interval = p->u.ofdm.guard_interval;
1119                 c->hierarchy = p->u.ofdm.hierarchy_information;
1120                 break;
1121         case DVBV3_ATSC:
1122                 dprintk("%s() Preparing ATSC req\n", __func__);
1123                 c->modulation = p->u.vsb.modulation;
1124                 if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
1125                         c->delivery_system = SYS_ATSC;
1126                 else
1127                         c->delivery_system = SYS_DVBC_ANNEX_B;
1128                 break;
1129         case DVBV3_UNKNOWN:
1130                 printk(KERN_ERR
1131                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1132                        __func__, c->delivery_system);
1133                 return -EINVAL;
1134         }
1135
1136         return 0;
1137 }
1138
1139 /* Ensure the cached values are set correctly in the frontend
1140  * legacy tuning structures, for the advanced tuning API.
1141  */
1142 static int dtv_property_legacy_params_sync(struct dvb_frontend *fe,
1143                                             struct dvb_frontend_parameters *p)
1144 {
1145         const struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1146
1147         p->frequency = c->frequency;
1148         p->inversion = c->inversion;
1149
1150         switch (dvbv3_type(c->delivery_system)) {
1151         case DVBV3_UNKNOWN:
1152                 printk(KERN_ERR
1153                        "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
1154                        __func__, c->delivery_system);
1155                 return -EINVAL;
1156         case DVBV3_QPSK:
1157                 dprintk("%s() Preparing QPSK req\n", __func__);
1158                 p->u.qpsk.symbol_rate = c->symbol_rate;
1159                 p->u.qpsk.fec_inner = c->fec_inner;
1160                 break;
1161         case DVBV3_QAM:
1162                 dprintk("%s() Preparing QAM req\n", __func__);
1163                 p->u.qam.symbol_rate = c->symbol_rate;
1164                 p->u.qam.fec_inner = c->fec_inner;
1165                 p->u.qam.modulation = c->modulation;
1166                 break;
1167         case DVBV3_OFDM:
1168                 dprintk("%s() Preparing OFDM req\n", __func__);
1169
1170                 switch (c->bandwidth_hz) {
1171                 case 10000000:
1172                         p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ;
1173                         break;
1174                 case 8000000:
1175                         p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
1176                         break;
1177                 case 7000000:
1178                         p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
1179                         break;
1180                 case 6000000:
1181                         p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
1182                         break;
1183                 case 5000000:
1184                         p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ;
1185                         break;
1186                 case 1712000:
1187                         p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ;
1188                         break;
1189                 case 0:
1190                 default:
1191                         p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
1192                 }
1193                 p->u.ofdm.code_rate_HP = c->code_rate_HP;
1194                 p->u.ofdm.code_rate_LP = c->code_rate_LP;
1195                 p->u.ofdm.constellation = c->modulation;
1196                 p->u.ofdm.transmission_mode = c->transmission_mode;
1197                 p->u.ofdm.guard_interval = c->guard_interval;
1198                 p->u.ofdm.hierarchy_information = c->hierarchy;
1199                 break;
1200         case DVBV3_ATSC:
1201                 dprintk("%s() Preparing VSB req\n", __func__);
1202                 p->u.vsb.modulation = c->modulation;
1203                 break;
1204         }
1205         return 0;
1206 }
1207
1208 /**
1209  * dtv_get_frontend - calls a callback for retrieving DTV parameters
1210  * @fe:         struct dvb_frontend pointer
1211  * @c:          struct dtv_frontend_properties pointer (DVBv5 cache)
1212  * @p_out       struct dvb_frontend_parameters pointer (DVBv3 FE struct)
1213  *
1214  * This routine calls either the DVBv3 or DVBv5 get_frontend call.
1215  * If c is not null, it will update the DVBv5 cache struct pointed by it.
1216  * If p_out is not null, it will update the DVBv3 params pointed by it.
1217  */
1218 static int dtv_get_frontend(struct dvb_frontend *fe,
1219                             struct dvb_frontend_parameters *p_out)
1220 {
1221         int r;
1222
1223         if (fe->ops.get_frontend) {
1224                 r = fe->ops.get_frontend(fe);
1225                 if (unlikely(r < 0))
1226                         return r;
1227                 if (p_out)
1228                         dtv_property_legacy_params_sync(fe, p_out);
1229                 return 0;
1230         }
1231
1232         /* As everything is in cache, get_frontend fops are always supported */
1233         return 0;
1234 }
1235
1236 static int dvb_frontend_ioctl_legacy(struct file *file,
1237                         unsigned int cmd, void *parg);
1238 static int dvb_frontend_ioctl_properties(struct file *file,
1239                         unsigned int cmd, void *parg);
1240
1241 static int dtv_property_process_get(struct dvb_frontend *fe,
1242                                     const struct dtv_frontend_properties *c,
1243                                     struct dtv_property *tvp,
1244                                     struct file *file)
1245 {
1246         int r, ncaps;
1247
1248         switch(tvp->cmd) {
1249         case DTV_ENUM_DELSYS:
1250                 ncaps = 0;
1251                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1252                         tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps];
1253                         ncaps++;
1254                 }
1255                 tvp->u.buffer.len = ncaps;
1256                 break;
1257         case DTV_FREQUENCY:
1258                 tvp->u.data = c->frequency;
1259                 break;
1260         case DTV_MODULATION:
1261                 tvp->u.data = c->modulation;
1262                 break;
1263         case DTV_BANDWIDTH_HZ:
1264                 tvp->u.data = c->bandwidth_hz;
1265                 break;
1266         case DTV_INVERSION:
1267                 tvp->u.data = c->inversion;
1268                 break;
1269         case DTV_SYMBOL_RATE:
1270                 tvp->u.data = c->symbol_rate;
1271                 break;
1272         case DTV_INNER_FEC:
1273                 tvp->u.data = c->fec_inner;
1274                 break;
1275         case DTV_PILOT:
1276                 tvp->u.data = c->pilot;
1277                 break;
1278         case DTV_ROLLOFF:
1279                 tvp->u.data = c->rolloff;
1280                 break;
1281         case DTV_DELIVERY_SYSTEM:
1282                 tvp->u.data = c->delivery_system;
1283                 break;
1284         case DTV_VOLTAGE:
1285                 tvp->u.data = c->voltage;
1286                 break;
1287         case DTV_TONE:
1288                 tvp->u.data = c->sectone;
1289                 break;
1290         case DTV_API_VERSION:
1291                 tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR;
1292                 break;
1293         case DTV_CODE_RATE_HP:
1294                 tvp->u.data = c->code_rate_HP;
1295                 break;
1296         case DTV_CODE_RATE_LP:
1297                 tvp->u.data = c->code_rate_LP;
1298                 break;
1299         case DTV_GUARD_INTERVAL:
1300                 tvp->u.data = c->guard_interval;
1301                 break;
1302         case DTV_TRANSMISSION_MODE:
1303                 tvp->u.data = c->transmission_mode;
1304                 break;
1305         case DTV_HIERARCHY:
1306                 tvp->u.data = c->hierarchy;
1307                 break;
1308
1309         /* ISDB-T Support here */
1310         case DTV_ISDBT_PARTIAL_RECEPTION:
1311                 tvp->u.data = c->isdbt_partial_reception;
1312                 break;
1313         case DTV_ISDBT_SOUND_BROADCASTING:
1314                 tvp->u.data = c->isdbt_sb_mode;
1315                 break;
1316         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1317                 tvp->u.data = c->isdbt_sb_subchannel;
1318                 break;
1319         case DTV_ISDBT_SB_SEGMENT_IDX:
1320                 tvp->u.data = c->isdbt_sb_segment_idx;
1321                 break;
1322         case DTV_ISDBT_SB_SEGMENT_COUNT:
1323                 tvp->u.data = c->isdbt_sb_segment_count;
1324                 break;
1325         case DTV_ISDBT_LAYER_ENABLED:
1326                 tvp->u.data = c->isdbt_layer_enabled;
1327                 break;
1328         case DTV_ISDBT_LAYERA_FEC:
1329                 tvp->u.data = c->layer[0].fec;
1330                 break;
1331         case DTV_ISDBT_LAYERA_MODULATION:
1332                 tvp->u.data = c->layer[0].modulation;
1333                 break;
1334         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1335                 tvp->u.data = c->layer[0].segment_count;
1336                 break;
1337         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1338                 tvp->u.data = c->layer[0].interleaving;
1339                 break;
1340         case DTV_ISDBT_LAYERB_FEC:
1341                 tvp->u.data = c->layer[1].fec;
1342                 break;
1343         case DTV_ISDBT_LAYERB_MODULATION:
1344                 tvp->u.data = c->layer[1].modulation;
1345                 break;
1346         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1347                 tvp->u.data = c->layer[1].segment_count;
1348                 break;
1349         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1350                 tvp->u.data = c->layer[1].interleaving;
1351                 break;
1352         case DTV_ISDBT_LAYERC_FEC:
1353                 tvp->u.data = c->layer[2].fec;
1354                 break;
1355         case DTV_ISDBT_LAYERC_MODULATION:
1356                 tvp->u.data = c->layer[2].modulation;
1357                 break;
1358         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1359                 tvp->u.data = c->layer[2].segment_count;
1360                 break;
1361         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1362                 tvp->u.data = c->layer[2].interleaving;
1363                 break;
1364         case DTV_ISDBS_TS_ID:
1365                 tvp->u.data = c->isdbs_ts_id;
1366                 break;
1367         case DTV_DVBT2_PLP_ID:
1368                 tvp->u.data = c->dvbt2_plp_id;
1369                 break;
1370         default:
1371                 return -EINVAL;
1372         }
1373
1374         /* Allow the frontend to override outgoing properties */
1375         if (fe->ops.get_property) {
1376                 r = fe->ops.get_property(fe, tvp);
1377                 if (r < 0)
1378                         return r;
1379         }
1380
1381         dtv_property_dump(tvp);
1382
1383         return 0;
1384 }
1385
1386 static int dtv_set_frontend(struct dvb_frontend *fe);
1387
1388 static bool is_dvbv3_delsys(u32 delsys)
1389 {
1390         bool status;
1391
1392         status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
1393                  (delsys == SYS_DVBS) || (delsys == SYS_ATSC);
1394
1395         return status;
1396 }
1397
1398 static int set_delivery_system(struct dvb_frontend *fe, u32 desired_system)
1399 {
1400         int ncaps, i;
1401         u32 delsys = SYS_UNDEFINED;
1402         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1403         enum dvbv3_emulation_type type;
1404
1405         /*
1406          * It was reported that some old DVBv5 applications were
1407          * filling delivery_system with SYS_UNDEFINED. If this happens,
1408          * assume that the application wants to use the first supported
1409          * delivery system.
1410          */
1411         if (c->delivery_system == SYS_UNDEFINED)
1412                 c->delivery_system = fe->ops.delsys[0];
1413
1414         if (desired_system == SYS_UNDEFINED) {
1415                 /*
1416                  * A DVBv3 call doesn't know what's the desired system.
1417                  * Also, DVBv3 applications don't know that ops.info->type
1418                  * could be changed, and they simply dies when it doesn't
1419                  * match.
1420                  * So, don't change the current delivery system, as it
1421                  * may be trying to do the wrong thing, like setting an
1422                  * ISDB-T frontend as DVB-T. Instead, find the closest
1423                  * DVBv3 system that matches the delivery system.
1424                  */
1425                 if (is_dvbv3_delsys(c->delivery_system)) {
1426                         dprintk("%s() Using delivery system to %d\n",
1427                                 __func__, c->delivery_system);
1428                         return 0;
1429                 }
1430                 type = dvbv3_type(c->delivery_system);
1431                 switch (type) {
1432                 case DVBV3_QPSK:
1433                         desired_system = SYS_DVBS;
1434                         break;
1435                 case DVBV3_QAM:
1436                         desired_system = SYS_DVBC_ANNEX_A;
1437                         break;
1438                 case DVBV3_ATSC:
1439                         desired_system = SYS_ATSC;
1440                         break;
1441                 case DVBV3_OFDM:
1442                         desired_system = SYS_DVBT;
1443                         break;
1444                 default:
1445                         dprintk("%s(): This frontend doesn't support DVBv3 calls\n",
1446                                 __func__);
1447                         return -EINVAL;
1448                 }
1449                 /*
1450                  * Get a delivery system that is compatible with DVBv3
1451                  * NOTE: in order for this to work with softwares like Kaffeine that
1452                  *      uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to
1453                  *      DVB-S, drivers that support both should put the SYS_DVBS entry
1454                  *      before the SYS_DVBS2, otherwise it won't switch back to DVB-S.
1455                  *      The real fix is that userspace applications should not use DVBv3
1456                  *      and not trust on calling FE_SET_FRONTEND to switch the delivery
1457                  *      system.
1458                  */
1459                 ncaps = 0;
1460                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1461                         if (fe->ops.delsys[ncaps] == desired_system) {
1462                                 delsys = desired_system;
1463                                 break;
1464                         }
1465                         ncaps++;
1466                 }
1467                 if (delsys == SYS_UNDEFINED) {
1468                         dprintk("%s() Couldn't find a delivery system that matches %d\n",
1469                                 __func__, desired_system);
1470                 }
1471         } else {
1472                 /*
1473                  * This is a DVBv5 call. So, it likely knows the supported
1474                  * delivery systems.
1475                  */
1476
1477                 /* Check if the desired delivery system is supported */
1478                 ncaps = 0;
1479                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1480                         if (fe->ops.delsys[ncaps] == desired_system) {
1481                                 c->delivery_system = desired_system;
1482                                 dprintk("%s() Changing delivery system to %d\n",
1483                                         __func__, desired_system);
1484                                 return 0;
1485                         }
1486                         ncaps++;
1487                 }
1488                 type = dvbv3_type(desired_system);
1489
1490                 /*
1491                  * The delivery system is not supported. See if it can be
1492                  * emulated.
1493                  * The emulation only works if the desired system is one of the
1494                  * DVBv3 delivery systems
1495                  */
1496                 if (!is_dvbv3_delsys(desired_system)) {
1497                         dprintk("%s() can't use a DVBv3 FE_SET_FRONTEND call on this frontend\n",
1498                                 __func__);
1499                         return -EINVAL;
1500                 }
1501
1502                 /*
1503                  * Get the last non-DVBv3 delivery system that has the same type
1504                  * of the desired system
1505                  */
1506                 ncaps = 0;
1507                 while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) {
1508                         if ((dvbv3_type(fe->ops.delsys[ncaps]) == type) &&
1509                             !is_dvbv3_delsys(fe->ops.delsys[ncaps]))
1510                                 delsys = fe->ops.delsys[ncaps];
1511                         ncaps++;
1512                 }
1513                 /* There's nothing compatible with the desired delivery system */
1514                 if (delsys == SYS_UNDEFINED) {
1515                         dprintk("%s() Incompatible DVBv3 FE_SET_FRONTEND call for this frontend\n",
1516                                 __func__);
1517                         return -EINVAL;
1518                 }
1519         }
1520
1521         c->delivery_system = delsys;
1522
1523         /*
1524          * The DVBv3 or DVBv5 call is requesting a different system. So,
1525          * emulation is needed.
1526          *
1527          * Emulate newer delivery systems like ISDBT, DVBT and DMBTH
1528          * for older DVBv5 applications. The emulation will try to use
1529          * the auto mode for most things, and will assume that the desired
1530          * delivery system is the last one at the ops.delsys[] array
1531          */
1532         dprintk("%s() Using delivery system %d emulated as if it were a %d\n",
1533                 __func__, delsys, desired_system);
1534
1535         /*
1536          * For now, handles ISDB-T calls. More code may be needed here for the
1537          * other emulated stuff
1538          */
1539         if (type == DVBV3_OFDM) {
1540                 if (c->delivery_system == SYS_ISDBT) {
1541                         dprintk("%s() Using defaults for SYS_ISDBT\n",
1542                                 __func__);
1543                         if (!c->bandwidth_hz)
1544                                 c->bandwidth_hz = 6000000;
1545
1546                         c->isdbt_partial_reception = 0;
1547                         c->isdbt_sb_mode = 0;
1548                         c->isdbt_sb_subchannel = 0;
1549                         c->isdbt_sb_segment_idx = 0;
1550                         c->isdbt_sb_segment_count = 0;
1551                         c->isdbt_layer_enabled = 0;
1552                         for (i = 0; i < 3; i++) {
1553                                 c->layer[i].fec = FEC_AUTO;
1554                                 c->layer[i].modulation = QAM_AUTO;
1555                                 c->layer[i].interleaving = 0;
1556                                 c->layer[i].segment_count = 0;
1557                         }
1558                 }
1559         }
1560         dprintk("change delivery system on cache to %d\n", c->delivery_system);
1561
1562         return 0;
1563 }
1564
1565 static int dtv_property_process_set(struct dvb_frontend *fe,
1566                                     struct dtv_property *tvp,
1567                                     struct file *file)
1568 {
1569         int r = 0;
1570         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1571
1572         /* Allow the frontend to validate incoming properties */
1573         if (fe->ops.set_property) {
1574                 r = fe->ops.set_property(fe, tvp);
1575                 if (r < 0)
1576                         return r;
1577         }
1578
1579         switch(tvp->cmd) {
1580         case DTV_CLEAR:
1581                 /*
1582                  * Reset a cache of data specific to the frontend here. This does
1583                  * not effect hardware.
1584                  */
1585                 dvb_frontend_clear_cache(fe);
1586                 break;
1587         case DTV_TUNE:
1588                 /* interpret the cache of data, build either a traditional frontend
1589                  * tunerequest so we can pass validation in the FE_SET_FRONTEND
1590                  * ioctl.
1591                  */
1592                 c->state = tvp->cmd;
1593                 dprintk("%s() Finalised property cache\n", __func__);
1594
1595                 r = dtv_set_frontend(fe);
1596                 break;
1597         case DTV_FREQUENCY:
1598                 c->frequency = tvp->u.data;
1599                 break;
1600         case DTV_MODULATION:
1601                 c->modulation = tvp->u.data;
1602                 break;
1603         case DTV_BANDWIDTH_HZ:
1604                 c->bandwidth_hz = tvp->u.data;
1605                 break;
1606         case DTV_INVERSION:
1607                 c->inversion = tvp->u.data;
1608                 break;
1609         case DTV_SYMBOL_RATE:
1610                 c->symbol_rate = tvp->u.data;
1611                 break;
1612         case DTV_INNER_FEC:
1613                 c->fec_inner = tvp->u.data;
1614                 break;
1615         case DTV_PILOT:
1616                 c->pilot = tvp->u.data;
1617                 break;
1618         case DTV_ROLLOFF:
1619                 c->rolloff = tvp->u.data;
1620                 break;
1621         case DTV_DELIVERY_SYSTEM:
1622                 r = set_delivery_system(fe, tvp->u.data);
1623                 break;
1624         case DTV_VOLTAGE:
1625                 c->voltage = tvp->u.data;
1626                 r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE,
1627                         (void *)c->voltage);
1628                 break;
1629         case DTV_TONE:
1630                 c->sectone = tvp->u.data;
1631                 r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE,
1632                         (void *)c->sectone);
1633                 break;
1634         case DTV_CODE_RATE_HP:
1635                 c->code_rate_HP = tvp->u.data;
1636                 break;
1637         case DTV_CODE_RATE_LP:
1638                 c->code_rate_LP = tvp->u.data;
1639                 break;
1640         case DTV_GUARD_INTERVAL:
1641                 c->guard_interval = tvp->u.data;
1642                 break;
1643         case DTV_TRANSMISSION_MODE:
1644                 c->transmission_mode = tvp->u.data;
1645                 break;
1646         case DTV_HIERARCHY:
1647                 c->hierarchy = tvp->u.data;
1648                 break;
1649
1650         /* ISDB-T Support here */
1651         case DTV_ISDBT_PARTIAL_RECEPTION:
1652                 c->isdbt_partial_reception = tvp->u.data;
1653                 break;
1654         case DTV_ISDBT_SOUND_BROADCASTING:
1655                 c->isdbt_sb_mode = tvp->u.data;
1656                 break;
1657         case DTV_ISDBT_SB_SUBCHANNEL_ID:
1658                 c->isdbt_sb_subchannel = tvp->u.data;
1659                 break;
1660         case DTV_ISDBT_SB_SEGMENT_IDX:
1661                 c->isdbt_sb_segment_idx = tvp->u.data;
1662                 break;
1663         case DTV_ISDBT_SB_SEGMENT_COUNT:
1664                 c->isdbt_sb_segment_count = tvp->u.data;
1665                 break;
1666         case DTV_ISDBT_LAYER_ENABLED:
1667                 c->isdbt_layer_enabled = tvp->u.data;
1668                 break;
1669         case DTV_ISDBT_LAYERA_FEC:
1670                 c->layer[0].fec = tvp->u.data;
1671                 break;
1672         case DTV_ISDBT_LAYERA_MODULATION:
1673                 c->layer[0].modulation = tvp->u.data;
1674                 break;
1675         case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
1676                 c->layer[0].segment_count = tvp->u.data;
1677                 break;
1678         case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
1679                 c->layer[0].interleaving = tvp->u.data;
1680                 break;
1681         case DTV_ISDBT_LAYERB_FEC:
1682                 c->layer[1].fec = tvp->u.data;
1683                 break;
1684         case DTV_ISDBT_LAYERB_MODULATION:
1685                 c->layer[1].modulation = tvp->u.data;
1686                 break;
1687         case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
1688                 c->layer[1].segment_count = tvp->u.data;
1689                 break;
1690         case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
1691                 c->layer[1].interleaving = tvp->u.data;
1692                 break;
1693         case DTV_ISDBT_LAYERC_FEC:
1694                 c->layer[2].fec = tvp->u.data;
1695                 break;
1696         case DTV_ISDBT_LAYERC_MODULATION:
1697                 c->layer[2].modulation = tvp->u.data;
1698                 break;
1699         case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
1700                 c->layer[2].segment_count = tvp->u.data;
1701                 break;
1702         case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
1703                 c->layer[2].interleaving = tvp->u.data;
1704                 break;
1705         case DTV_ISDBS_TS_ID:
1706                 c->isdbs_ts_id = tvp->u.data;
1707                 break;
1708         case DTV_DVBT2_PLP_ID:
1709                 c->dvbt2_plp_id = tvp->u.data;
1710                 break;
1711         default:
1712                 return -EINVAL;
1713         }
1714
1715         return r;
1716 }
1717
1718 static int dvb_frontend_ioctl(struct file *file,
1719                         unsigned int cmd, void *parg)
1720 {
1721         struct dvb_device *dvbdev = file->private_data;
1722         struct dvb_frontend *fe = dvbdev->priv;
1723         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1724         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1725         int err = -EOPNOTSUPP;
1726
1727         dprintk("%s (%d)\n", __func__, _IOC_NR(cmd));
1728
1729         if (fepriv->exit != DVB_FE_NO_EXIT)
1730                 return -ENODEV;
1731
1732         if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
1733             (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
1734              cmd == FE_DISEQC_RECV_SLAVE_REPLY))
1735                 return -EPERM;
1736
1737         if (down_interruptible (&fepriv->sem))
1738                 return -ERESTARTSYS;
1739
1740         if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
1741                 err = dvb_frontend_ioctl_properties(file, cmd, parg);
1742         else {
1743                 c->state = DTV_UNDEFINED;
1744                 err = dvb_frontend_ioctl_legacy(file, cmd, parg);
1745         }
1746
1747         up(&fepriv->sem);
1748         return err;
1749 }
1750
1751 static int dvb_frontend_ioctl_properties(struct file *file,
1752                         unsigned int cmd, void *parg)
1753 {
1754         struct dvb_device *dvbdev = file->private_data;
1755         struct dvb_frontend *fe = dvbdev->priv;
1756         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1757         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1758         int err = 0;
1759
1760         struct dtv_properties *tvps = NULL;
1761         struct dtv_property *tvp = NULL;
1762         int i;
1763
1764         dprintk("%s\n", __func__);
1765
1766         if(cmd == FE_SET_PROPERTY) {
1767                 tvps = (struct dtv_properties __user *)parg;
1768
1769                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1770                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1771
1772                 /* Put an arbitrary limit on the number of messages that can
1773                  * be sent at once */
1774                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1775                         return -EINVAL;
1776
1777                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1778                 if (!tvp) {
1779                         err = -ENOMEM;
1780                         goto out;
1781                 }
1782
1783                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1784                         err = -EFAULT;
1785                         goto out;
1786                 }
1787
1788                 for (i = 0; i < tvps->num; i++) {
1789                         err = dtv_property_process_set(fe, tvp + i, file);
1790                         if (err < 0)
1791                                 goto out;
1792                         (tvp + i)->result = err;
1793                 }
1794
1795                 if (c->state == DTV_TUNE)
1796                         dprintk("%s() Property cache is full, tuning\n", __func__);
1797
1798         } else
1799         if(cmd == FE_GET_PROPERTY) {
1800                 tvps = (struct dtv_properties __user *)parg;
1801
1802                 dprintk("%s() properties.num = %d\n", __func__, tvps->num);
1803                 dprintk("%s() properties.props = %p\n", __func__, tvps->props);
1804
1805                 /* Put an arbitrary limit on the number of messages that can
1806                  * be sent at once */
1807                 if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS))
1808                         return -EINVAL;
1809
1810                 tvp = kmalloc(tvps->num * sizeof(struct dtv_property), GFP_KERNEL);
1811                 if (!tvp) {
1812                         err = -ENOMEM;
1813                         goto out;
1814                 }
1815
1816                 if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
1817                         err = -EFAULT;
1818                         goto out;
1819                 }
1820
1821                 /*
1822                  * Fills the cache out struct with the cache contents, plus
1823                  * the data retrieved from get_frontend, if the frontend
1824                  * is not idle. Otherwise, returns the cached content
1825                  */
1826                 if (fepriv->state != FESTATE_IDLE) {
1827                         err = dtv_get_frontend(fe, NULL);
1828                         if (err < 0)
1829                                 goto out;
1830                 }
1831                 for (i = 0; i < tvps->num; i++) {
1832                         err = dtv_property_process_get(fe, c, tvp + i, file);
1833                         if (err < 0)
1834                                 goto out;
1835                         (tvp + i)->result = err;
1836                 }
1837
1838                 if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) {
1839                         err = -EFAULT;
1840                         goto out;
1841                 }
1842
1843         } else
1844                 err = -EOPNOTSUPP;
1845
1846 out:
1847         kfree(tvp);
1848         return err;
1849 }
1850
1851 static int dtv_set_frontend(struct dvb_frontend *fe)
1852 {
1853         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1854         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1855         struct dvb_frontend_tune_settings fetunesettings;
1856         u32 rolloff = 0;
1857
1858         if (dvb_frontend_check_parameters(fe) < 0)
1859                 return -EINVAL;
1860
1861         /*
1862          * Initialize output parameters to match the values given by
1863          * the user. FE_SET_FRONTEND triggers an initial frontend event
1864          * with status = 0, which copies output parameters to userspace.
1865          */
1866         dtv_property_legacy_params_sync(fe, &fepriv->parameters_out);
1867
1868         /*
1869          * Be sure that the bandwidth will be filled for all
1870          * non-satellite systems, as tuners need to know what
1871          * low pass/Nyquist half filter should be applied, in
1872          * order to avoid inter-channel noise.
1873          *
1874          * ISDB-T and DVB-T/T2 already sets bandwidth.
1875          * ATSC and DVB-C don't set, so, the core should fill it.
1876          *
1877          * On DVB-C Annex A and C, the bandwidth is a function of
1878          * the roll-off and symbol rate. Annex B defines different
1879          * roll-off factors depending on the modulation. Fortunately,
1880          * Annex B is only used with 6MHz, so there's no need to
1881          * calculate it.
1882          *
1883          * While not officially supported, a side effect of handling it at
1884          * the cache level is that a program could retrieve the bandwidth
1885          * via DTV_BANDWIDTH_HZ, which may be useful for test programs.
1886          */
1887         switch (c->delivery_system) {
1888         case SYS_ATSC:
1889         case SYS_DVBC_ANNEX_B:
1890                 c->bandwidth_hz = 6000000;
1891                 break;
1892         case SYS_DVBC_ANNEX_A:
1893                 rolloff = 115;
1894                 break;
1895         case SYS_DVBC_ANNEX_C:
1896                 rolloff = 113;
1897                 break;
1898         default:
1899                 break;
1900         }
1901         if (rolloff)
1902                 c->bandwidth_hz = (c->symbol_rate * rolloff) / 100;
1903
1904         /* force auto frequency inversion if requested */
1905         if (dvb_force_auto_inversion)
1906                 c->inversion = INVERSION_AUTO;
1907
1908         /*
1909          * without hierarchical coding code_rate_LP is irrelevant,
1910          * so we tolerate the otherwise invalid FEC_NONE setting
1911          */
1912         if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE)
1913                 c->code_rate_LP = FEC_AUTO;
1914
1915         /* get frontend-specific tuning settings */
1916         memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
1917         if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
1918                 fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
1919                 fepriv->max_drift = fetunesettings.max_drift;
1920                 fepriv->step_size = fetunesettings.step_size;
1921         } else {
1922                 /* default values */
1923                 switch (c->delivery_system) {
1924                 case SYS_DVBC_ANNEX_A:
1925                 case SYS_DVBC_ANNEX_C:
1926                         fepriv->min_delay = HZ / 20;
1927                         fepriv->step_size = c->symbol_rate / 16000;
1928                         fepriv->max_drift = c->symbol_rate / 2000;
1929                         break;
1930                 case SYS_DVBT:
1931                 case SYS_DVBT2:
1932                 case SYS_ISDBT:
1933                 case SYS_DMBTH:
1934                         fepriv->min_delay = HZ / 20;
1935                         fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
1936                         fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
1937                         break;
1938                 default:
1939                         /*
1940                          * FIXME: This sounds wrong! if freqency_stepsize is
1941                          * defined by the frontend, why not use it???
1942                          */
1943                         fepriv->min_delay = HZ / 20;
1944                         fepriv->step_size = 0; /* no zigzag */
1945                         fepriv->max_drift = 0;
1946                         break;
1947                 }
1948         }
1949         if (dvb_override_tune_delay > 0)
1950                 fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
1951
1952         fepriv->state = FESTATE_RETUNE;
1953
1954         /* Request the search algorithm to search */
1955         fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
1956
1957         dvb_frontend_clear_events(fe);
1958         dvb_frontend_add_event(fe, 0);
1959         dvb_frontend_wakeup(fe);
1960         fepriv->status = 0;
1961
1962         return 0;
1963 }
1964
1965
1966 static int dvb_frontend_ioctl_legacy(struct file *file,
1967                         unsigned int cmd, void *parg)
1968 {
1969         struct dvb_device *dvbdev = file->private_data;
1970         struct dvb_frontend *fe = dvbdev->priv;
1971         struct dvb_frontend_private *fepriv = fe->frontend_priv;
1972         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1973         int cb_err, err = -EOPNOTSUPP;
1974
1975         if (fe->dvb->fe_ioctl_override) {
1976                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
1977                                                     DVB_FE_IOCTL_PRE);
1978                 if (cb_err < 0)
1979                         return cb_err;
1980                 if (cb_err > 0)
1981                         return 0;
1982                 /* fe_ioctl_override returning 0 allows
1983                  * dvb-core to continue handling the ioctl */
1984         }
1985
1986         switch (cmd) {
1987         case FE_GET_INFO: {
1988                 struct dvb_frontend_info* info = parg;
1989
1990                 memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
1991                 dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max);
1992
1993                 /*
1994                  * Associate the 4 delivery systems supported by DVBv3
1995                  * API with their DVBv5 counterpart. For the other standards,
1996                  * use the closest type, assuming that it would hopefully
1997                  * work with a DVBv3 application.
1998                  * It should be noticed that, on multi-frontend devices with
1999                  * different types (terrestrial and cable, for example),
2000                  * a pure DVBv3 application won't be able to use all delivery
2001                  * systems. Yet, changing the DVBv5 cache to the other delivery
2002                  * system should be enough for making it work.
2003                  */
2004                 switch (dvbv3_type(c->delivery_system)) {
2005                 case DVBV3_QPSK:
2006                         info->type = FE_QPSK;
2007                         break;
2008                 case DVBV3_ATSC:
2009                         info->type = FE_ATSC;
2010                         break;
2011                 case DVBV3_QAM:
2012                         info->type = FE_QAM;
2013                         break;
2014                 case DVBV3_OFDM:
2015                         info->type = FE_OFDM;
2016                         break;
2017                 default:
2018                         printk(KERN_ERR
2019                                "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n",
2020                                __func__, c->delivery_system);
2021                         fe->ops.info.type = FE_OFDM;
2022                 }
2023                 dprintk("current delivery system on cache: %d, V3 type: %d\n",
2024                         c->delivery_system, fe->ops.info.type);
2025
2026                 /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
2027                  * do it, it is done for it. */
2028                 info->caps |= FE_CAN_INVERSION_AUTO;
2029                 err = 0;
2030                 break;
2031         }
2032
2033         case FE_READ_STATUS: {
2034                 fe_status_t* status = parg;
2035
2036                 /* if retune was requested but hasn't occurred yet, prevent
2037                  * that user get signal state from previous tuning */
2038                 if (fepriv->state == FESTATE_RETUNE ||
2039                     fepriv->state == FESTATE_ERROR) {
2040                         err=0;
2041                         *status = 0;
2042                         break;
2043                 }
2044
2045                 if (fe->ops.read_status)
2046                         err = fe->ops.read_status(fe, status);
2047                 break;
2048         }
2049         case FE_READ_BER:
2050                 if (fe->ops.read_ber)
2051                         err = fe->ops.read_ber(fe, (__u32*) parg);
2052                 break;
2053
2054         case FE_READ_SIGNAL_STRENGTH:
2055                 if (fe->ops.read_signal_strength)
2056                         err = fe->ops.read_signal_strength(fe, (__u16*) parg);
2057                 break;
2058
2059         case FE_READ_SNR:
2060                 if (fe->ops.read_snr)
2061                         err = fe->ops.read_snr(fe, (__u16*) parg);
2062                 break;
2063
2064         case FE_READ_UNCORRECTED_BLOCKS:
2065                 if (fe->ops.read_ucblocks)
2066                         err = fe->ops.read_ucblocks(fe, (__u32*) parg);
2067                 break;
2068
2069
2070         case FE_DISEQC_RESET_OVERLOAD:
2071                 if (fe->ops.diseqc_reset_overload) {
2072                         err = fe->ops.diseqc_reset_overload(fe);
2073                         fepriv->state = FESTATE_DISEQC;
2074                         fepriv->status = 0;
2075                 }
2076                 break;
2077
2078         case FE_DISEQC_SEND_MASTER_CMD:
2079                 if (fe->ops.diseqc_send_master_cmd) {
2080                         err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
2081                         fepriv->state = FESTATE_DISEQC;
2082                         fepriv->status = 0;
2083                 }
2084                 break;
2085
2086         case FE_DISEQC_SEND_BURST:
2087                 if (fe->ops.diseqc_send_burst) {
2088                         err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
2089                         fepriv->state = FESTATE_DISEQC;
2090                         fepriv->status = 0;
2091                 }
2092                 break;
2093
2094         case FE_SET_TONE:
2095                 if (fe->ops.set_tone) {
2096                         err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
2097                         fepriv->tone = (fe_sec_tone_mode_t) parg;
2098                         fepriv->state = FESTATE_DISEQC;
2099                         fepriv->status = 0;
2100                 }
2101                 break;
2102
2103         case FE_SET_VOLTAGE:
2104                 if (fe->ops.set_voltage) {
2105                         err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
2106                         fepriv->voltage = (fe_sec_voltage_t) parg;
2107                         fepriv->state = FESTATE_DISEQC;
2108                         fepriv->status = 0;
2109                 }
2110                 break;
2111
2112         case FE_DISHNETWORK_SEND_LEGACY_CMD:
2113                 if (fe->ops.dishnetwork_send_legacy_command) {
2114                         err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
2115                         fepriv->state = FESTATE_DISEQC;
2116                         fepriv->status = 0;
2117                 } else if (fe->ops.set_voltage) {
2118                         /*
2119                          * NOTE: This is a fallback condition.  Some frontends
2120                          * (stv0299 for instance) take longer than 8msec to
2121                          * respond to a set_voltage command.  Those switches
2122                          * need custom routines to switch properly.  For all
2123                          * other frontends, the following should work ok.
2124                          * Dish network legacy switches (as used by Dish500)
2125                          * are controlled by sending 9-bit command words
2126                          * spaced 8msec apart.
2127                          * the actual command word is switch/port dependent
2128                          * so it is up to the userspace application to send
2129                          * the right command.
2130                          * The command must always start with a '0' after
2131                          * initialization, so parg is 8 bits and does not
2132                          * include the initialization or start bit
2133                          */
2134                         unsigned long swcmd = ((unsigned long) parg) << 1;
2135                         struct timeval nexttime;
2136                         struct timeval tv[10];
2137                         int i;
2138                         u8 last = 1;
2139                         if (dvb_frontend_debug)
2140                                 printk("%s switch command: 0x%04lx\n", __func__, swcmd);
2141                         do_gettimeofday(&nexttime);
2142                         if (dvb_frontend_debug)
2143                                 memcpy(&tv[0], &nexttime, sizeof(struct timeval));
2144                         /* before sending a command, initialize by sending
2145                          * a 32ms 18V to the switch
2146                          */
2147                         fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
2148                         dvb_frontend_sleep_until(&nexttime, 32000);
2149
2150                         for (i = 0; i < 9; i++) {
2151                                 if (dvb_frontend_debug)
2152                                         do_gettimeofday(&tv[i + 1]);
2153                                 if ((swcmd & 0x01) != last) {
2154                                         /* set voltage to (last ? 13V : 18V) */
2155                                         fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
2156                                         last = (last) ? 0 : 1;
2157                                 }
2158                                 swcmd = swcmd >> 1;
2159                                 if (i != 8)
2160                                         dvb_frontend_sleep_until(&nexttime, 8000);
2161                         }
2162                         if (dvb_frontend_debug) {
2163                                 printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
2164                                         __func__, fe->dvb->num);
2165                                 for (i = 1; i < 10; i++)
2166                                         printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
2167                         }
2168                         err = 0;
2169                         fepriv->state = FESTATE_DISEQC;
2170                         fepriv->status = 0;
2171                 }
2172                 break;
2173
2174         case FE_DISEQC_RECV_SLAVE_REPLY:
2175                 if (fe->ops.diseqc_recv_slave_reply)
2176                         err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
2177                 break;
2178
2179         case FE_ENABLE_HIGH_LNB_VOLTAGE:
2180                 if (fe->ops.enable_high_lnb_voltage)
2181                         err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
2182                 break;
2183
2184         case FE_SET_FRONTEND:
2185                 err = set_delivery_system(fe, SYS_UNDEFINED);
2186                 if (err)
2187                         break;
2188
2189                 err = dtv_property_cache_sync(fe, c, parg);
2190                 if (err)
2191                         break;
2192                 err = dtv_set_frontend(fe);
2193                 break;
2194         case FE_GET_EVENT:
2195                 err = dvb_frontend_get_event (fe, parg, file->f_flags);
2196                 break;
2197
2198         case FE_GET_FRONTEND:
2199                 err = dtv_get_frontend(fe, parg);
2200                 break;
2201
2202         case FE_SET_FRONTEND_TUNE_MODE:
2203                 fepriv->tune_mode_flags = (unsigned long) parg;
2204                 err = 0;
2205                 break;
2206         };
2207
2208         if (fe->dvb->fe_ioctl_override) {
2209                 cb_err = fe->dvb->fe_ioctl_override(fe, cmd, parg,
2210                                                     DVB_FE_IOCTL_POST);
2211                 if (cb_err < 0)
2212                         return cb_err;
2213         }
2214
2215         return err;
2216 }
2217
2218
2219 static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
2220 {
2221         struct dvb_device *dvbdev = file->private_data;
2222         struct dvb_frontend *fe = dvbdev->priv;
2223         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2224
2225         dprintk ("%s\n", __func__);
2226
2227         poll_wait (file, &fepriv->events.wait_queue, wait);
2228
2229         if (fepriv->events.eventw != fepriv->events.eventr)
2230                 return (POLLIN | POLLRDNORM | POLLPRI);
2231
2232         return 0;
2233 }
2234
2235 static int dvb_frontend_open(struct inode *inode, struct file *file)
2236 {
2237         struct dvb_device *dvbdev = file->private_data;
2238         struct dvb_frontend *fe = dvbdev->priv;
2239         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2240         struct dvb_adapter *adapter = fe->dvb;
2241         int ret;
2242
2243         dprintk ("%s\n", __func__);
2244         if (fepriv->exit == DVB_FE_DEVICE_REMOVED)
2245                 return -ENODEV;
2246
2247         if (adapter->mfe_shared) {
2248                 mutex_lock (&adapter->mfe_lock);
2249
2250                 if (adapter->mfe_dvbdev == NULL)
2251                         adapter->mfe_dvbdev = dvbdev;
2252
2253                 else if (adapter->mfe_dvbdev != dvbdev) {
2254                         struct dvb_device
2255                                 *mfedev = adapter->mfe_dvbdev;
2256                         struct dvb_frontend
2257                                 *mfe = mfedev->priv;
2258                         struct dvb_frontend_private
2259                                 *mfepriv = mfe->frontend_priv;
2260                         int mferetry = (dvb_mfe_wait_time << 1);
2261
2262                         mutex_unlock (&adapter->mfe_lock);
2263                         while (mferetry-- && (mfedev->users != -1 ||
2264                                         mfepriv->thread != NULL)) {
2265                                 if(msleep_interruptible(500)) {
2266                                         if(signal_pending(current))
2267                                                 return -EINTR;
2268                                 }
2269                         }
2270
2271                         mutex_lock (&adapter->mfe_lock);
2272                         if(adapter->mfe_dvbdev != dvbdev) {
2273                                 mfedev = adapter->mfe_dvbdev;
2274                                 mfe = mfedev->priv;
2275                                 mfepriv = mfe->frontend_priv;
2276                                 if (mfedev->users != -1 ||
2277                                                 mfepriv->thread != NULL) {
2278                                         mutex_unlock (&adapter->mfe_lock);
2279                                         return -EBUSY;
2280                                 }
2281                                 adapter->mfe_dvbdev = dvbdev;
2282                         }
2283                 }
2284         }
2285
2286         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
2287                 if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
2288                         goto err0;
2289
2290                 /* If we took control of the bus, we need to force
2291                    reinitialization.  This is because many ts_bus_ctrl()
2292                    functions strobe the RESET pin on the demod, and if the
2293                    frontend thread already exists then the dvb_init() routine
2294                    won't get called (which is what usually does initial
2295                    register configuration). */
2296                 fepriv->reinitialise = 1;
2297         }
2298
2299         if ((ret = dvb_generic_open (inode, file)) < 0)
2300                 goto err1;
2301
2302         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2303                 /* normal tune mode when opened R/W */
2304                 fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
2305                 fepriv->tone = -1;
2306                 fepriv->voltage = -1;
2307
2308                 ret = dvb_frontend_start (fe);
2309                 if (ret)
2310                         goto err2;
2311
2312                 /*  empty event queue */
2313                 fepriv->events.eventr = fepriv->events.eventw = 0;
2314         }
2315
2316         if (adapter->mfe_shared)
2317                 mutex_unlock (&adapter->mfe_lock);
2318         return ret;
2319
2320 err2:
2321         dvb_generic_release(inode, file);
2322 err1:
2323         if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
2324                 fe->ops.ts_bus_ctrl(fe, 0);
2325 err0:
2326         if (adapter->mfe_shared)
2327                 mutex_unlock (&adapter->mfe_lock);
2328         return ret;
2329 }
2330
2331 static int dvb_frontend_release(struct inode *inode, struct file *file)
2332 {
2333         struct dvb_device *dvbdev = file->private_data;
2334         struct dvb_frontend *fe = dvbdev->priv;
2335         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2336         int ret;
2337
2338         dprintk ("%s\n", __func__);
2339
2340         if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
2341                 fepriv->release_jiffies = jiffies;
2342                 mb();
2343         }
2344
2345         ret = dvb_generic_release (inode, file);
2346
2347         if (dvbdev->users == -1) {
2348                 wake_up(&fepriv->wait_queue);
2349                 if (fepriv->exit != DVB_FE_NO_EXIT) {
2350                         fops_put(file->f_op);
2351                         file->f_op = NULL;
2352                         wake_up(&dvbdev->wait_queue);
2353                 }
2354                 if (fe->ops.ts_bus_ctrl)
2355                         fe->ops.ts_bus_ctrl(fe, 0);
2356         }
2357
2358         return ret;
2359 }
2360
2361 static const struct file_operations dvb_frontend_fops = {
2362         .owner          = THIS_MODULE,
2363         .unlocked_ioctl = dvb_generic_ioctl,
2364         .poll           = dvb_frontend_poll,
2365         .open           = dvb_frontend_open,
2366         .release        = dvb_frontend_release,
2367         .llseek         = noop_llseek,
2368 };
2369
2370 int dvb_register_frontend(struct dvb_adapter* dvb,
2371                           struct dvb_frontend* fe)
2372 {
2373         struct dvb_frontend_private *fepriv;
2374         static const struct dvb_device dvbdev_template = {
2375                 .users = ~0,
2376                 .writers = 1,
2377                 .readers = (~0)-1,
2378                 .fops = &dvb_frontend_fops,
2379                 .kernel_ioctl = dvb_frontend_ioctl
2380         };
2381
2382         dprintk ("%s\n", __func__);
2383
2384         if (mutex_lock_interruptible(&frontend_mutex))
2385                 return -ERESTARTSYS;
2386
2387         fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
2388         if (fe->frontend_priv == NULL) {
2389                 mutex_unlock(&frontend_mutex);
2390                 return -ENOMEM;
2391         }
2392         fepriv = fe->frontend_priv;
2393
2394         sema_init(&fepriv->sem, 1);
2395         init_waitqueue_head (&fepriv->wait_queue);
2396         init_waitqueue_head (&fepriv->events.wait_queue);
2397         mutex_init(&fepriv->events.mtx);
2398         fe->dvb = dvb;
2399         fepriv->inversion = INVERSION_OFF;
2400
2401         printk ("DVB: registering adapter %i frontend %i (%s)...\n",
2402                 fe->dvb->num,
2403                 fe->id,
2404                 fe->ops.info.name);
2405
2406         dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
2407                              fe, DVB_DEVICE_FRONTEND);
2408
2409         /*
2410          * Initialize the cache to the proper values according with the
2411          * first supported delivery system (ops->delsys[0])
2412          */
2413
2414         fe->dtv_property_cache.delivery_system = fe->ops.delsys[0];
2415         dvb_frontend_clear_cache(fe);
2416
2417         mutex_unlock(&frontend_mutex);
2418         return 0;
2419 }
2420 EXPORT_SYMBOL(dvb_register_frontend);
2421
2422 int dvb_unregister_frontend(struct dvb_frontend* fe)
2423 {
2424         struct dvb_frontend_private *fepriv = fe->frontend_priv;
2425         dprintk ("%s\n", __func__);
2426
2427         mutex_lock(&frontend_mutex);
2428         dvb_frontend_stop (fe);
2429         mutex_unlock(&frontend_mutex);
2430
2431         if (fepriv->dvbdev->users < -1)
2432                 wait_event(fepriv->dvbdev->wait_queue,
2433                                 fepriv->dvbdev->users==-1);
2434
2435         mutex_lock(&frontend_mutex);
2436         dvb_unregister_device (fepriv->dvbdev);
2437
2438         /* fe is invalid now */
2439         kfree(fepriv);
2440         mutex_unlock(&frontend_mutex);
2441         return 0;
2442 }
2443 EXPORT_SYMBOL(dvb_unregister_frontend);
2444
2445 #ifdef CONFIG_MEDIA_ATTACH
2446 void dvb_frontend_detach(struct dvb_frontend* fe)
2447 {
2448         void *ptr;
2449
2450         if (fe->ops.release_sec) {
2451                 fe->ops.release_sec(fe);
2452                 symbol_put_addr(fe->ops.release_sec);
2453         }
2454         if (fe->ops.tuner_ops.release) {
2455                 fe->ops.tuner_ops.release(fe);
2456                 symbol_put_addr(fe->ops.tuner_ops.release);
2457         }
2458         if (fe->ops.analog_ops.release) {
2459                 fe->ops.analog_ops.release(fe);
2460                 symbol_put_addr(fe->ops.analog_ops.release);
2461         }
2462         ptr = (void*)fe->ops.release;
2463         if (ptr) {
2464                 fe->ops.release(fe);
2465                 symbol_put_addr(ptr);
2466         }
2467 }
2468 #else
2469 void dvb_frontend_detach(struct dvb_frontend* fe)
2470 {
2471         if (fe->ops.release_sec)
2472                 fe->ops.release_sec(fe);
2473         if (fe->ops.tuner_ops.release)
2474                 fe->ops.tuner_ops.release(fe);
2475         if (fe->ops.analog_ops.release)
2476                 fe->ops.analog_ops.release(fe);
2477         if (fe->ops.release)
2478                 fe->ops.release(fe);
2479 }
2480 #endif
2481 EXPORT_SYMBOL(dvb_frontend_detach);