summaryrefslogtreecommitdiffstats
path: root/firmware/backlight.c
blob: d621aa42d10d36a904cc7e4f457edeb7ecb26405 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 by Linus Nielsen Feltzing
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include "config.h"
#include <stdlib.h>
#include "cpu.h"
#include "kernel.h"
#include "thread.h"
#include "i2c.h"
#include "debug.h"
#include "rtc.h"
#include "usb.h"
#include "power.h"
#include "system.h"
#include "button.h"
#include "timer.h"
#include "backlight.h"

#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
#include "lcd.h" /* for lcd_enable() and lcd_sleep() */
#endif
#ifdef HAVE_REMOTE_LCD
#include "lcd-remote.h"
#endif
#if defined(TARGET_TREE) && !defined(SIMULATOR)
#include "backlight-target.h"
#endif

#ifdef SIMULATOR
static inline void __backlight_on(void)
{
    sim_backlight(100);
}

static inline void __backlight_off(void)
{
    sim_backlight(0);
}

#ifdef HAVE_BACKLIGHT_BRIGHTNESS
static inline void __backlight_set_brightness(int val)
{
    (void)val;
}
#endif

#else
/* Basic low-level code that simply switches backlight on or off. Probably
 * a nice candidate for inclusion in the target/ dir. */
#ifndef TARGET_TREE
static inline void __backlight_on(void)
{
#if CONFIG_BACKLIGHT == BL_RTC
    /* Enable square wave */
    rtc_write(0x0a, rtc_read(0x0a) | 0x40);
#elif CONFIG_BACKLIGHT == BL_PA14_LO /* Player */
    and_b(~0x40, &PADRH); /* drive and set low */
    or_b(0x40, &PAIORH);
#elif CONFIG_BACKLIGHT == BL_PA14_HI /* Ondio */
    or_b(0x40, &PADRH); /* drive it high */
#endif
}

static inline void __backlight_off(void)
{
#if CONFIG_BACKLIGHT == BL_RTC
    /* Disable square wave */
    rtc_write(0x0a, rtc_read(0x0a) & ~0x40);
#elif CONFIG_BACKLIGHT == BL_PA14_LO /* Player */
    and_b(~0x40, &PAIORH); /* let it float (up) */
#elif CONFIG_BACKLIGHT == BL_PA14_HI /* Ondio */
    and_b(~0x40, &PADRH); /* drive it low */
#endif
}
#endif
#endif /* SIMULATOR */

#if defined(CONFIG_BACKLIGHT) && !defined(BOOTLOADER)

const signed char backlight_timeout_value[19] =
{
    -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 45, 60, 90
};

#define BACKLIGHT_ON 1
#define BACKLIGHT_OFF 2
#define REMOTE_BACKLIGHT_ON 3
#define REMOTE_BACKLIGHT_OFF 4
#define BACKLIGHT_UNBOOST_CPU 5
#ifdef HAVE_LCD_SLEEP
#define LCD_SLEEP 6
#endif

static void backlight_thread(void);
static long backlight_stack[DEFAULT_STACK_SIZE/sizeof(long)];
#ifdef X5_BACKLIGHT_SHUTDOWN
#define BACKLIGHT_QUIT 256
#endif
static const char backlight_thread_name[] = "backlight";
static struct event_queue backlight_queue;

static int backlight_timer;
static int backlight_timeout = 5*HZ;
#ifdef CONFIG_CHARGING
static int backlight_timeout_plugged = 5*HZ;
#endif
#ifdef HAS_BUTTON_HOLD
static int backlight_on_button_hold = 0;
#endif

#ifdef HAVE_REMOTE_LCD
static int remote_backlight_timer;
static int remote_backlight_timeout = 5*HZ;
#ifdef CONFIG_CHARGING
static int remote_backlight_timeout_plugged = 5*HZ;
#endif
#ifdef HAS_REMOTE_BUTTON_HOLD
static int remote_backlight_on_button_hold = 0;
#endif
#endif

#ifdef HAVE_LCD_SLEEP
const signed char lcd_sleep_timeout_value[10] =
{
    -1, 0, 5, 10, 15, 20, 30, 45, 60, 90
};
static int lcd_sleep_timer;
static int lcd_sleep_timeout = 10*HZ;
#endif

#if defined(HAVE_BACKLIGHT_PWM_FADING) && !defined(SIMULATOR)
/* backlight fading */
#define BL_PWM_INTERVAL 5000  /* Cycle interval in s */
#define BL_PWM_COUNT    100
static const char backlight_fade_value[8] = { 0, 1, 2, 4, 6, 8, 10, 20 };
static int fade_in_count = 1;
static int fade_out_count = 4;

static bool bl_timer_active = false;
static int bl_dim_current = 0;
static int bl_dim_target  = 0;
static int bl_pwm_counter = 0;
static volatile int bl_cycle_counter = 0;
static enum {DIM_STATE_START, DIM_STATE_MAIN} bl_dim_state = DIM_STATE_START;

static void backlight_isr(void)
{
    int timer_period;
    bool idle = false;
    
    timer_period = TIMER_FREQ / 1000 * BL_PWM_INTERVAL / 1000;
    switch (bl_dim_state) 
    {
      /* New cycle */
      case DIM_STATE_START:
        bl_pwm_counter = 0;
        bl_cycle_counter++;
        
        if (bl_dim_current > 0 && bl_dim_current < BL_PWM_COUNT)
        {
            __backlight_on();
            bl_pwm_counter = bl_dim_current;
            timer_period = timer_period * bl_pwm_counter / BL_PWM_COUNT;
            bl_dim_state = DIM_STATE_MAIN;
        } 
        else
        {
            if (bl_dim_current)
                __backlight_on();
            else
                __backlight_off();
            if (bl_dim_current == bl_dim_target)
                idle = true;
        }
        
        break ;
        
      /* Dim main screen */
      case DIM_STATE_MAIN:
        __backlight_off();
        bl_dim_state = DIM_STATE_START;
        timer_period = timer_period * (BL_PWM_COUNT - bl_pwm_counter) / BL_PWM_COUNT;
        break ;
    }

    if ((bl_dim_target > bl_dim_current) && (bl_cycle_counter >= fade_in_count))
    {
        bl_dim_current++;
        bl_cycle_counter = 0;
    }

    if ((bl_dim_target < bl_dim_current) && (bl_cycle_counter >= fade_out_count))
    {
        bl_dim_current--;
        bl_cycle_counter = 0;
    }

    if (idle) 
    {
#ifdef CPU_COLDFIRE
        queue_post(&backlight_queue, BACKLIGHT_UNBOOST_CPU, 0);
#endif
        timer_unregister();
        bl_timer_active = false;
    }
    else
        timer_set_period(timer_period);
}

static void backlight_switch(void)
{
    if (bl_dim_target > (BL_PWM_COUNT/2))
    {
        __backlight_on();
        bl_dim_current = BL_PWM_COUNT;
    }
    else
    {
        __backlight_off();
        bl_dim_current = 0;
    }
}

static void backlight_release_timer(void)
{
#ifdef CPU_COLDFIRE
    cpu_boost(false);
#endif
    timer_unregister();
    bl_timer_active = false;
    backlight_switch();
}

static void backlight_dim(int value)
{
    /* protect from extraneous calls with the same target value */
    if (value == bl_dim_target)
        return;

    bl_dim_target = value;

    if (bl_timer_active)
        return ;

    if (timer_register(0, backlight_release_timer, 2, 0, backlight_isr))
    {
#ifdef CPU_COLDFIRE
        /* Prevent cpu frequency changes while dimming. */
        cpu_boost(true);
#endif
        bl_timer_active = true;
    }
    else
        backlight_switch();
}

void backlight_set_fade_in(int index)
{
    fade_in_count = backlight_fade_value[index];
}

void backlight_set_fade_out(int index)
{
    fade_out_count = backlight_fade_value[index];
}
#endif /* defined(HAVE_BACKLIGHT_PWM_FADING) && !defined(SIMULATOR) */

static void _backlight_on(void)
{
#if defined(HAVE_BACKLIGHT_PWM_FADING) && !defined(SIMULATOR)
    if (fade_in_count > 0)
        backlight_dim(BL_PWM_COUNT);
    else
    {
        bl_dim_target = bl_dim_current = BL_PWM_COUNT;
        __backlight_on();
    }
#elif defined(HAVE_BACKLIGHT_SET_FADING) && !defined(SIMULATOR)
    /* call the enable from here - it takes longer than the disable */
    lcd_enable(true);
    __backlight_dim(false);
#else
    __backlight_on();
#endif
#ifdef HAVE_LCD_SLEEP
    lcd_sleep_timer = 0; /* LCD should be awake already */
#endif
}

static void _backlight_off(void)
{
#if defined(HAVE_BACKLIGHT_PWM_FADING) && !defined(SIMULATOR)
    if (fade_out_count > 0)
        backlight_dim(0);
    else
    {
        bl_dim_target = bl_dim_current = 0;
        __backlight_off();
    }
#elif defined(HAVE_BACKLIGHT_SET_FADING) && !defined(SIMULATOR)
    __backlight_dim(true);
#else
    __backlight_off();
#endif

#ifdef HAVE_LCD_SLEEP
    /* Start LCD sleep countdown */
    if (lcd_sleep_timeout < 0)
    {
        lcd_sleep_timer = 0; /* Setting == Always */
        lcd_sleep();
    }
    else
        lcd_sleep_timer = lcd_sleep_timeout;
#endif
}

#ifdef HAVE_REMOTE_LCD
#ifdef SIMULATOR
static void __remote_backlight_on(void)
{
    sim_remote_backlight(100);
}

static void __remote_backlight_off(void)
{
    sim_remote_backlight(0);
}
#endif /* SIMULATOR */
#endif /* HAVE_REMOTE_LCD */

/* Update state of backlight according to timeout setting */
static void backlight_update_state(void)
{
#ifdef CONFIG_CHARGING
    if (charger_inserted()
#ifdef HAVE_USB_POWER
            || usb_powered()
#endif
            )
        backlight_timer = backlight_timeout_plugged;
    else
#endif
        backlight_timer = backlight_timeout;

    /* Backlight == OFF in the setting? */
    if (backlight_timer < 0)
    {
        backlight_timer = 0; /* Disable the timeout */
#ifdef HAS_BUTTON_HOLD
        if (backlight_on_button_hold == 2 && button_hold())
            return; /* Keep on if "On" */
#endif
        _backlight_off();
    }
    else
    {
#ifdef HAS_BUTTON_HOLD
        if (backlight_on_button_hold == 1 && button_hold())
        {
            /* Keep off if "Off". */
            backlight_timer = 0; /* Disable the timeout */
            return;
        }
#endif
        _backlight_on();
    }
}

#ifdef HAVE_REMOTE_LCD
/* Update state of remote backlight according to timeout setting */
static void remote_backlight_update_state(void)
{
#ifdef CONFIG_CHARGING
    if (charger_inserted()
#ifdef HAVE_USB_POWER
            || usb_powered()
#endif
            )
        remote_backlight_timer = remote_backlight_timeout_plugged;
    else
#endif
        remote_backlight_timer = remote_backlight_timeout;

    /* Backlight == OFF in the setting? */
    if (remote_backlight_timer < 0)
    {
        remote_backlight_timer = 0; /* Disable the timeout */
#ifdef HAS_REMOTE_BUTTON_HOLD
        if (remote_backlight_on_button_hold == 2 && remote_button_hold())
            return; /* Keep on if "On" */
#endif
        __remote_backlight_off();
    }
    else
    {
#if defined(IRIVER_H100_SERIES) || defined(IRIVER_H300_SERIES)
        if (remote_type() == REMOTETYPE_H300_NONLCD)
        {
            backlight_update_state();
        }
        else
#endif
        {
#ifdef HAS_REMOTE_BUTTON_HOLD
            if (remote_backlight_on_button_hold == 1 && remote_button_hold())
            {
                /* Keep off if "Off". */
                remote_backlight_timer = 0; /* Disable the timeout */
                return;
            }
#endif
            __remote_backlight_on();
        }
    }
}
#endif /* HAVE_REMOTE_LCD */

void backlight_thread(void)
{
    struct event ev;

    while(1)
    {
        queue_wait(&backlight_queue, &ev);
        switch(ev.id)
        {
#ifdef HAVE_REMOTE_LCD
            case REMOTE_BACKLIGHT_ON:
                remote_backlight_update_state();
                break;

            case REMOTE_BACKLIGHT_OFF:
                remote_backlight_timer = 0; /* Disable the timeout */
#ifdef HAS_REMOTE_BUTTON_HOLD
                if (remote_backlight_on_button_hold == 2 &&
                    remote_button_hold())
                    break; /* Keep on if "On" */
#endif
                __remote_backlight_off();
                break;
#endif /* HAVE_REMOTE_LCD */

            case BACKLIGHT_ON:
                backlight_update_state();
                break;

            case BACKLIGHT_OFF:
                backlight_timer = 0; /* Disable the timeout */
#ifdef HAS_BUTTON_HOLD
                if (backlight_on_button_hold == 2 && button_hold())
                    break; /* Keep on if "On" */
#endif
                _backlight_off();
                break;

#ifdef HAVE_LCD_SLEEP
            case LCD_SLEEP:
                lcd_sleep();
                break;
#endif

#ifdef X5_BACKLIGHT_SHUTDOWN
            case BACKLIGHT_QUIT:
                remove_thread(NULL);
                break;
#endif

#if defined(HAVE_BACKLIGHT_PWM_FADING) && defined(CPU_COLDFIRE) \
    && !defined(SIMULATOR)
            case BACKLIGHT_UNBOOST_CPU:
                cpu_boost(false);
                break;
#endif

            case SYS_USB_CONNECTED:
                /* Tell the USB thread that we are safe */
                DEBUGF("backlight_thread got SYS_USB_CONNECTED\n");
                usb_acknowledge(SYS_USB_CONNECTED_ACK);
                break;

            case SYS_USB_DISCONNECTED:
                usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
                break;
        } /* end switch */
    } /* end while */
}

static void backlight_tick(void)
{
#ifdef CONFIG_CHARGING
    static bool charger_was_inserted = false;
    bool charger_is_inserted = charger_inserted()
#ifdef HAVE_USB_POWER
        || usb_powered()
#endif
        ;

    if( charger_was_inserted != charger_is_inserted )
    {
        backlight_on();
#ifdef HAVE_REMOTE_LCD
        remote_backlight_on();
#endif
    }
    charger_was_inserted = charger_is_inserted;
#endif /* CONFIG_CHARGING */

    if(backlight_timer)
    {
        backlight_timer--;
        if(backlight_timer == 0)
        {
            backlight_off();
        }
    }
#ifdef HAVE_LCD_SLEEP
    else if(lcd_sleep_timer)
    {
        lcd_sleep_timer--;
        if(lcd_sleep_timer == 0)
        {
            /* Queue on bl thread or freeze! */
            queue_post(&backlight_queue, LCD_SLEEP, 0);
        }
    }
#endif /* HAVE_LCD_SLEEP */

#ifdef HAVE_REMOTE_LCD
    if(remote_backlight_timer)
    {
        remote_backlight_timer--;
        if(remote_backlight_timer == 0)
        {
            remote_backlight_off();
        }
    }
#endif /* HAVE_REMOVE_LCD */
}

void backlight_init(void)
{
    queue_init(&backlight_queue, true);

#ifdef SIMULATOR
    /* do nothing */
#elif defined(__BACKLIGHT_INIT)
    /* Remove the __BACKLIGHT_INIT references when __backlight_init is
       available on all backlighted targets. Take them out of the
       backlight-target.h files as well */
    if (__backlight_init())
    {
# if defined(HAVE_BACKLIGHT_PWM_FADING) && !defined(SIMULATOR)
        /* If backlight is already on, don't fade in. */
        bl_dim_current = BL_PWM_COUNT;
        bl_dim_target = BL_PWM_COUNT;
# endif
    }
#elif CONFIG_BACKLIGHT == BL_PA14_LO || CONFIG_BACKLIGHT == BL_PA14_HI
    PACR1 &= ~0x3000;    /* Set PA14 (backlight control) to GPIO */
    or_b(0x40, &PAIORH); /* ..and output */
#endif
    backlight_on();
#ifdef HAVE_REMOTE_LCD
    remote_backlight_on();
#endif
    
    create_thread(backlight_thread, backlight_stack,
                  sizeof(backlight_stack), backlight_thread_name 
                  IF_PRIO(, PRIORITY_SYSTEM));
    tick_add_task(backlight_tick);
}

#ifdef X5_BACKLIGHT_SHUTDOWN
void x5_backlight_shutdown(void)
{
    /* Turn on the screen and don't let anyone else mess with it. Called
       from clean_shutdown in misc.c. */
    queue_empty(&backlight_queue);
    tick_remove_task(backlight_tick);
    /* Next time the thread runs, if at all, it will just remove itself. */
    queue_post(&backlight_queue, BACKLIGHT_QUIT, 0);
    __backlight_on();
}
#endif /* X5_BACKLIGHT_SHUTDOWN */

void backlight_on(void)
{
    queue_remove_from_head(&backlight_queue, BACKLIGHT_ON);
    queue_post(&backlight_queue, BACKLIGHT_ON, 0);
}

void backlight_off(void)
{
    queue_post(&backlight_queue, BACKLIGHT_OFF, 0);
}

/* returns true when the backlight is on OR when it's set to always off */
bool is_backlight_on(void)
{
    if (backlight_timer || backlight_get_current_timeout() <= 0)
        return true;
    else
        return false;
}

/* return value in ticks; 0 means always on, <0 means always off */
int backlight_get_current_timeout(void)
{
#ifdef CONFIG_CHARGING
    if (charger_inserted()
#ifdef HAVE_USB_POWER
            || usb_powered()
#endif
        )
        return backlight_timeout_plugged;
    else
        return backlight_timeout;
#else
    return backlight_timeout;
#endif
}

void backlight_set_timeout(int index)
{
    if((unsigned)index >= sizeof(backlight_timeout_value))
        /* if given a weird value, use default */
        index = 6;
    backlight_timeout = HZ * backlight_timeout_value[index];
    backlight_update_state();
}

#ifdef CONFIG_CHARGING
void backlight_set_timeout_plugged(int index)
{
    if((unsigned)index >= sizeof(backlight_timeout_value))
        /* if given a weird value, use default */
        index = 6;
    backlight_timeout_plugged = HZ * backlight_timeout_value[index];
    backlight_update_state();
}
#endif /* CONFIG_CHARGING */

#ifdef HAS_BUTTON_HOLD
/* Hold button change event handler. */
void backlight_hold_changed(bool hold_button)
{
    /* Hold switch overrides all backlight behavior except when
       set to "Normal" */
    /* Queue or freeze */
    if (hold_button && backlight_on_button_hold == 1)
        backlight_off(); /* setting == Off */
    else  /* setting == On, Normal, no hold button, or anything else */
        backlight_on();
}

void backlight_set_on_button_hold(int index)
{
    if ((unsigned)index >= 3)
        /* if given a weird value, use default */
        index = 0;

    if (index == backlight_on_button_hold)
        return;

    backlight_on_button_hold = index;
    backlight_hold_changed(button_hold());
}
#endif /* HAS_BUTTON_HOLD */

#ifdef HAVE_LCD_SLEEP
void lcd_set_sleep_after_backlight_off(int index)
{
    if ((unsigned)index >= sizeof(lcd_sleep_timeout_value))
        /* if given a weird value, use default */
        index = 3;

    lcd_sleep_timeout = HZ * lcd_sleep_timeout_value[index];

    if (backlight_timer > 0 || backlight_get_current_timeout() == 0)
        /* Timer will be set when bl turns off or bl set to on. */
        return;

    /* Backlight is Off */
    if (lcd_sleep_timeout < 0)
        lcd_sleep_timer = 1; /* Always - sleep next tick */
    else
        lcd_sleep_timer = lcd_sleep_timeout; /* Never, other */
}
#endif /* HAVE_LCD_SLEEP */

#ifdef HAVE_REMOTE_LCD
void remote_backlight_on(void)
{
    queue_post(&backlight_queue, REMOTE_BACKLIGHT_ON, 0);
}

void remote_backlight_off(void)
{
    queue_post(&backlight_queue, REMOTE_BACKLIGHT_OFF, 0);
}

void remote_backlight_set_timeout(int index)
{
    if((unsigned)index >= sizeof(backlight_timeout_value))
        /* if given a weird value, use default */
        index=6;
    remote_backlight_timeout = HZ * backlight_timeout_value[index];
    remote_backlight_update_state();
}

#ifdef CONFIG_CHARGING
void remote_backlight_set_timeout_plugged(int index)
{
    if((unsigned)index >= sizeof(backlight_timeout_value))
        /* if given a weird value, use default */
        index=6;
    remote_backlight_timeout_plugged = HZ * backlight_timeout_value[index];
    remote_backlight_update_state();
}
#endif /* CONFIG_CHARGING */

#ifdef HAS_REMOTE_BUTTON_HOLD
/* Remote hold button change event handler. */
void remote_backlight_hold_changed(bool rc_hold_button)
{
    /* Hold switch overrides all backlight behavior except when
       set to "Normal" */
    /* Queue or freeze */
    if (rc_hold_button && remote_backlight_on_button_hold == 1)
        remote_backlight_off(); /* setting == Off */
    else  /* setting == On, Normal, no hold button, or anything else */
        remote_backlight_on();

}

void remote_backlight_set_on_button_hold(int index)
{
    if ((unsigned)index >= 3)
        /* if given a weird value, use default */
        index = 0;

    if (index == remote_backlight_on_button_hold)
        return;

    remote_backlight_on_button_hold = index;
    remote_backlight_hold_changed(remote_button_hold());
}
#endif /* HAS_REMOTE_BUTTON_HOLD */

/* return value in ticks; 0 means always on, <0 means always off */
int remote_backlight_get_current_timeout(void)
{
#ifdef CONFIG_CHARGING
    if (charger_inserted()
#ifdef HAVE_USB_POWER
            || usb_powered()
#endif
        )
        return remote_backlight_timeout_plugged;
    else
        return remote_backlight_timeout;
#else
    return remote_backlight_timeout;
#endif
}

/* returns true when the backlight is on OR when it's set to always off */
bool is_remote_backlight_on(void)
{
    if (remote_backlight_timer != 0 ||
                    remote_backlight_get_current_timeout() <= 0)
        return true;
    else
        return false;
}

#endif /* HAVE_REMOTE_LCD */

#ifdef HAVE_BACKLIGHT_BRIGHTNESS
void backlight_set_brightness(int val)
{
    if (val < MIN_BRIGHTNESS_SETTING)
        val = MIN_BRIGHTNESS_SETTING;
    else if (val > MAX_BRIGHTNESS_SETTING)
        val = MAX_BRIGHTNESS_SETTING;

    __backlight_set_brightness(val);
}
#endif /* HAVE_BACKLIGHT_BRIGHTNESS */

#else /* !defined(CONFIG_BACKLIGHT) || defined(BOOTLOADER)
    -- no backlight, empty dummy functions */

#if defined(BOOTLOADER) && defined(CONFIG_BACKLIGHT)
void backlight_init(void)
{
#ifdef __BACKLIGHT_INIT
    __backlight_init();
    __backlight_on();
#endif
}
#endif

void backlight_on(void) {}
void backlight_off(void) {}
void backlight_set_timeout(int index) {(void)index;}
bool is_backlight_on(void) {return true;}
#ifdef HAVE_REMOTE_LCD
void remote_backlight_on(void) {}
void remote_backlight_off(void) {}
void remote_backlight_set_timeout(int index) {(void)index;}
bool is_remote_backlight_on(void) {return true;}
#endif /* HAVE_REMOTE_LCD */
#ifdef HAVE_BACKLIGHT_BRIGHTNESS
void backlight_set_brightness(int val) { (void)val; }
#endif
#endif /* defined(CONFIG_BACKLIGHT) && !defined(BOOTLOADER) */