diff options
Diffstat (limited to 'firmware/target/hosted/ypr0/backlight-ypr0.c')
-rw-r--r-- | firmware/target/hosted/ypr0/backlight-ypr0.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/firmware/target/hosted/ypr0/backlight-ypr0.c b/firmware/target/hosted/ypr0/backlight-ypr0.c new file mode 100644 index 0000000000..930b56be2e --- /dev/null +++ b/firmware/target/hosted/ypr0/backlight-ypr0.c | |||
@@ -0,0 +1,89 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id: backlight-gigabeat-s.c 25800 2010-05-04 10:07:53Z jethead71 $ | ||
9 | * | ||
10 | * Copyright (C) 2011 by Lorenzo Miori | ||
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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | #include "config.h" | ||
22 | #include "system.h" | ||
23 | #include "backlight.h" | ||
24 | #include "backlight-target.h" | ||
25 | #include "lcd.h" | ||
26 | #include "as3514.h" | ||
27 | #include "ascodec-target.h" | ||
28 | #include <fcntl.h> | ||
29 | #include "unistd.h" | ||
30 | |||
31 | static bool backlight_on_status = true; /* Is on or off? */ | ||
32 | |||
33 | /*TODO: see if LCD sleep could be implemented in a better way -> ie using a rockbox feature */ | ||
34 | /* Turn off LCD power supply */ | ||
35 | static void _backlight_lcd_sleep(void) | ||
36 | { | ||
37 | int fp = open("/sys/class/graphics/fb0/blank", O_RDWR); | ||
38 | write(fp, "1", 1); | ||
39 | close(fp); | ||
40 | } | ||
41 | /* Turn on LCD screen */ | ||
42 | static void _backlight_lcd_power(void) | ||
43 | { | ||
44 | int fp = open("/sys/class/graphics/fb0/blank", O_RDWR); | ||
45 | write(fp, "0", 1); | ||
46 | close(fp); | ||
47 | } | ||
48 | |||
49 | bool _backlight_init(void) | ||
50 | { | ||
51 | /* We have nothing to do */ | ||
52 | return true; | ||
53 | } | ||
54 | |||
55 | void _backlight_on(void) | ||
56 | { | ||
57 | if (!backlight_on_status) | ||
58 | { | ||
59 | /* Turn on lcd power before backlight */ | ||
60 | _backlight_lcd_power(); | ||
61 | /* Original app sets this to 0xb1 when backlight is on... */ | ||
62 | ascodec_write_pmu(AS3543_BACKLIGHT, 0x1, 0xb1); | ||
63 | } | ||
64 | |||
65 | backlight_on_status = true; | ||
66 | |||
67 | } | ||
68 | |||
69 | void _backlight_off(void) | ||
70 | { | ||
71 | if (backlight_on_status) { | ||
72 | /* Disabling the DCDC15 completely, keeps brightness register value */ | ||
73 | ascodec_write_pmu(AS3543_BACKLIGHT, 0x1, 0x00); | ||
74 | /* Turn off lcd power then */ | ||
75 | _backlight_lcd_sleep(); | ||
76 | } | ||
77 | |||
78 | backlight_on_status = false; | ||
79 | } | ||
80 | |||
81 | void _backlight_set_brightness(int brightness) | ||
82 | { | ||
83 | /* Just another check... */ | ||
84 | if (brightness > MAX_BRIGHTNESS_SETTING) | ||
85 | brightness = MAX_BRIGHTNESS_SETTING; | ||
86 | if (brightness < MIN_BRIGHTNESS_SETTING) | ||
87 | brightness = MIN_BRIGHTNESS_SETTING; | ||
88 | ascodec_write_pmu(AS3543_BACKLIGHT, 0x3, brightness << 3 & 0xf8); | ||
89 | } | ||