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Diffstat (limited to 'firmware/target/arm/imx233/creative-zenmozaic/backlight-zenmozaic.c')
-rw-r--r--firmware/target/arm/imx233/creative-zenmozaic/backlight-zenmozaic.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/firmware/target/arm/imx233/creative-zenmozaic/backlight-zenmozaic.c b/firmware/target/arm/imx233/creative-zenmozaic/backlight-zenmozaic.c
new file mode 100644
index 0000000000..0d223b52e9
--- /dev/null
+++ b/firmware/target/arm/imx233/creative-zenmozaic/backlight-zenmozaic.c
@@ -0,0 +1,69 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2013 by Amaury Pouly
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 "config.h"
23#include "system.h"
24#include "backlight.h"
25#include "lcd.h"
26#include "backlight-target.h"
27#include "uartdbg-imx233.h"
28#include "pinctrl-imx233.h"
29
30void _backlight_set_brightness(int level)
31{
32 unsigned val = (level + 200) * level / 1000;
33 if(level != 0)
34 {
35 for(unsigned mask = 0x10; mask; mask >>= 1)
36 imx233_uartdbg_send((val & mask) ? 0xff : 0xf8);
37 imx233_uartdbg_send(0);
38 imx233_pinctrl_set_gpio(1, 12, true);
39 }
40 else
41 imx233_pinctrl_set_gpio(1, 12, false);
42}
43
44bool _backlight_init(void)
45{
46 imx233_pinctrl_acquire(1, 12, "backlight_enable");
47 imx233_pinctrl_set_function(1, 12, PINCTRL_FUNCTION_GPIO);
48 imx233_pinctrl_enable_gpio(1, 12, true);
49 imx233_uartdbg_init(BAUD_38400);
50 return true;
51}
52
53void _backlight_on(void)
54{
55#ifdef HAVE_LCD_ENABLE
56 lcd_enable(true); /* power on lcd + visible display */
57#endif
58 /* restore the previous backlight level */
59 _backlight_set_brightness(backlight_brightness);
60}
61
62void _backlight_off(void)
63{
64 /* there is no real on/off but we can set to 0 brightness */
65 _backlight_set_brightness(0);
66#ifdef HAVE_LCD_ENABLE
67 lcd_enable(false); /* power off visible display */
68#endif
69}