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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* 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 "dac.h"
#ifdef HAVE_DAC3550A
static bool line_in_enabled = false;
static bool dac_enabled = false;
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();
}
#endif
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