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Basic backlight driver for Nano 2G 

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21935 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2009-07-17 22:40:36 +00:00
parent 92a7418415
commit 6432941f10
2 changed files with 68 additions and 0 deletions
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1
firmware/SOURCES
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@ -1302,6 +1302,7 @@ target/arm/s5l8700/udacodec-meizu.c
#ifdef IPOD_NANO2G
target/arm/s5l8700/kernel-s5l8700.c
target/arm/s5l8700/ipodnano2g/backlight-nano2g.c
target/arm/s5l8700/ipodnano2g/lcd-nano2g.c
#endif

67
firmware/target/arm/s5l8700/ipodnano2g/backlight-nano2g.c Normal file
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@ -0,0 +1,67 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2009 by Dave Chapman
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdbool.h>
#include "config.h"
#include "backlight.h"
#include "backlight-target.h"
#include "i2c-s5l8700.h"
static unsigned char bl_i2c_readbyte(int address)
{
unsigned char tmp;
i2c_read(0xe6, address, 1, &tmp);
return tmp;
}
static void bl_i2c_writebyte(int address, unsigned char val)
{
i2c_write(0xe6, address, 1, &val);
}
void _backlight_set_brightness(int brightness)
{
(void)brightness;
}
void _backlight_on(void)
{
bl_i2c_writebyte(0x2b,10);
bl_i2c_writebyte(0x2a,6);
bl_i2c_writebyte(0x28,0x2e);
bl_i2c_writebyte(0x29,(bl_i2c_readbyte(0x29)&0xf0)|1);
bl_i2c_writebyte(0x2a,7);
}
void _backlight_off(void)
{
bl_i2c_writebyte(0x2b,10);
bl_i2c_writebyte(0x29,bl_i2c_readbyte(0x29)&0xf0);
bl_i2c_writebyte(0x2a,7);
}
bool _backlight_init(void)
{
_backlight_on();
}