569285794b
For the git migration we want a nice clean repository with UNIX line endings. git does not use svn:eol-style, we just need the file contents to be sane. Sorry everybody. I know this messes up blame. Scumbag *NIX developer says migrating to git will make line ending issues go away; commits giant change to svn which changes line endings anyway. :) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30924 a1c6a512-1295-4272-9138-f99709370657
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2002 by Linus Nielsen Feltzing
|
|
*
|
|
* 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 "config.h"
|
|
#include "stdbool.h"
|
|
#include "i2c.h"
|
|
#include "debug.h"
|
|
#include "dac3550a.h"
|
|
|
|
static bool line_in_enabled = false;
|
|
static bool dac_enabled = false;
|
|
|
|
/* convert tenth of dB volume (-780..+180) to dac3550 register value */
|
|
int tenthdb2reg(int db)
|
|
{
|
|
if (db < -540) /* 3 dB steps */
|
|
return (db + 780) / 30;
|
|
else /* 1.5 dB steps */
|
|
return (db + 660) / 15;
|
|
}
|
|
|
|
int dac_volume(unsigned int left, unsigned int right, bool deemph)
|
|
{
|
|
int ret = 0;
|
|
unsigned char buf[3];
|
|
|
|
i2c_begin();
|
|
|
|
if (left > 0x38)
|
|
left = 0x38;
|
|
if (right > 0x38)
|
|
right = 0x38;
|
|
|
|
buf[0] = DAC_REG_WRITE | DAC_AVOL;
|
|
buf[1] = (left & 0x3f) | (deemph ? 0x40 : 0);
|
|
buf[2] = right & 0x3f;
|
|
|
|
/* send write command */
|
|
if (i2c_write(DAC_DEV_WRITE,buf,3))
|
|
{
|
|
ret = -1;
|
|
}
|
|
|
|
i2c_end();
|
|
return ret;
|
|
}
|
|
|
|
/******************************************************************
|
|
** Bit6: 0 = 3V 1 = 5V
|
|
** Bit5: 0 = normal 1 = low power
|
|
** Bit4: 0 = AUX2 off 1 = AUX2 on
|
|
** Bit3: 0 = AUX1 off 1 = AUX1 on
|
|
** Bit2: 0 = DAC off 1 = DAC on
|
|
** Bit1: 0 = stereo 1 = mono
|
|
** Bit0: 0 = normal right amp 1 = inverted right amp
|
|
******************************************************************/
|
|
/* dac_config is called once to initialize it. we will apply
|
|
our static settings because of the init flow.
|
|
dac_init -> dac_line_in -> mpeg_init -> dac_config
|
|
*/
|
|
static int dac_config(void)
|
|
{
|
|
int ret = 0;
|
|
unsigned char buf[2];
|
|
|
|
i2c_begin();
|
|
|
|
buf[0] = DAC_REG_WRITE | DAC_GCFG;
|
|
buf[1] = (dac_enabled ? 0x04 : 0) |
|
|
(line_in_enabled ? 0x08 : 0);
|
|
|
|
/* send write command */
|
|
if (i2c_write(DAC_DEV_WRITE,buf,2))
|
|
{
|
|
ret = -1;
|
|
}
|
|
|
|
i2c_end();
|
|
return ret;
|
|
}
|
|
|
|
void dac_enable(bool enable)
|
|
{
|
|
dac_enabled = enable;
|
|
dac_config();
|
|
}
|
|
|
|
void dac_line_in(bool enable)
|
|
{
|
|
line_in_enabled = enable;
|
|
dac_config();
|
|
}
|
|
|
|
void dac_init(void)
|
|
{
|
|
unsigned char buf[2];
|
|
|
|
i2c_begin();
|
|
|
|
buf[0] = DAC_REG_WRITE | DAC_SR_REG;
|
|
buf[1] = 0x07;
|
|
|
|
/* send write command */
|
|
i2c_write(DAC_DEV_WRITE,buf,2);
|
|
i2c_end();
|
|
}
|
|
|