diff options
Diffstat (limited to 'firmware/target/mips/ingenic_x1000/fiiom3k/backlight-fiiom3k.c')
-rw-r--r-- | firmware/target/mips/ingenic_x1000/fiiom3k/backlight-fiiom3k.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/firmware/target/mips/ingenic_x1000/fiiom3k/backlight-fiiom3k.c b/firmware/target/mips/ingenic_x1000/fiiom3k/backlight-fiiom3k.c new file mode 100644 index 0000000000..f02fcaaee8 --- /dev/null +++ b/firmware/target/mips/ingenic_x1000/fiiom3k/backlight-fiiom3k.c | |||
@@ -0,0 +1,88 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2021 Aidan MacDonald | ||
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 | |||
22 | #include "backlight.h" | ||
23 | #include "backlight-target.h" | ||
24 | #include "lcd.h" | ||
25 | #include "pwm-x1000.h" | ||
26 | |||
27 | #define BL_LCD_CHN 0 | ||
28 | #define BL_LCD_PERIOD 33000 | ||
29 | |||
30 | #define BL_BTN_CHN 4 | ||
31 | #define BL_BTN_PERIOD 100000 | ||
32 | |||
33 | static int backlight_calc_duty(int period, int min_duty, int brightness) | ||
34 | { | ||
35 | return min_duty + (period - min_duty) * brightness / MAX_BRIGHTNESS_SETTING; | ||
36 | } | ||
37 | |||
38 | bool backlight_hw_init(void) | ||
39 | { | ||
40 | pwm_init(BL_LCD_CHN); | ||
41 | pwm_init(BL_BTN_CHN); | ||
42 | pwm_enable(BL_LCD_CHN); | ||
43 | pwm_enable(BL_BTN_CHN); | ||
44 | backlight_hw_brightness(MAX_BRIGHTNESS_SETTING); | ||
45 | buttonlight_hw_brightness(MAX_BRIGHTNESS_SETTING); | ||
46 | /* TODO: avoid buttonlight flicker when powering up the machine */ | ||
47 | return true; | ||
48 | } | ||
49 | |||
50 | void backlight_hw_on(void) | ||
51 | { | ||
52 | pwm_enable(BL_LCD_CHN); | ||
53 | #ifdef HAVE_LCD_ENABLE | ||
54 | lcd_enable(true); | ||
55 | #endif | ||
56 | } | ||
57 | |||
58 | void backlight_hw_off(void) | ||
59 | { | ||
60 | pwm_disable(BL_LCD_CHN); | ||
61 | #ifdef HAVE_LCD_ENABLE | ||
62 | lcd_enable(false); | ||
63 | #endif | ||
64 | } | ||
65 | |||
66 | void backlight_hw_brightness(int brightness) | ||
67 | { | ||
68 | int duty_ns = backlight_calc_duty(BL_LCD_PERIOD, 0, brightness); | ||
69 | pwm_set_period(BL_LCD_CHN, BL_LCD_PERIOD, duty_ns); | ||
70 | } | ||
71 | |||
72 | void buttonlight_hw_on(void) | ||
73 | { | ||
74 | pwm_enable(BL_BTN_CHN); | ||
75 | } | ||
76 | |||
77 | void buttonlight_hw_off(void) | ||
78 | { | ||
79 | pwm_disable(BL_BTN_CHN); | ||
80 | } | ||
81 | |||
82 | void buttonlight_hw_brightness(int brightness) | ||
83 | { | ||
84 | /* Duty cycle below 11% seems to turn the buttonlight off entirely, | ||
85 | * so we need to rescale the range */ | ||
86 | int duty_ns = backlight_calc_duty(BL_BTN_PERIOD, BL_BTN_PERIOD*11/100, brightness); | ||
87 | pwm_set_period(BL_BTN_CHN, BL_BTN_PERIOD, duty_ns); | ||
88 | } | ||