2acc0ac542
later. We still need to hunt down snippets used that are not. 1324 modified files... http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Linus Nielsen Feltzing
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "stdbool.h"
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#include "i2c.h"
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#include "debug.h"
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#include "dac.h"
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#ifdef HAVE_DAC3550A
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static bool line_in_enabled = false;
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static bool dac_enabled = false;
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int dac_volume(unsigned int left, unsigned int right, bool deemph)
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{
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int ret = 0;
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unsigned char buf[3];
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i2c_begin();
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if (left > 0x38)
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left = 0x38;
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if (right > 0x38)
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right = 0x38;
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buf[0] = DAC_REG_WRITE | DAC_AVOL;
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buf[1] = (left & 0x3f) | (deemph ? 0x40 : 0);
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buf[2] = right & 0x3f;
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/* send write command */
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if (i2c_write(DAC_DEV_WRITE,buf,3))
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{
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ret = -1;
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}
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i2c_end();
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return ret;
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}
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/******************************************************************
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** Bit6: 0 = 3V 1 = 5V
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** Bit5: 0 = normal 1 = low power
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** Bit4: 0 = AUX2 off 1 = AUX2 on
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** Bit3: 0 = AUX1 off 1 = AUX1 on
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** Bit2: 0 = DAC off 1 = DAC on
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** Bit1: 0 = stereo 1 = mono
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** Bit0: 0 = normal right amp 1 = inverted right amp
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******************************************************************/
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/* dac_config is called once to initialize it. we will apply
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our static settings because of the init flow.
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dac_init -> dac_line_in -> mpeg_init -> dac_config
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*/
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static int dac_config(void)
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{
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int ret = 0;
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unsigned char buf[2];
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i2c_begin();
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buf[0] = DAC_REG_WRITE | DAC_GCFG;
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buf[1] = (dac_enabled ? 0x04 : 0) |
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(line_in_enabled ? 0x08 : 0);
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/* send write command */
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if (i2c_write(DAC_DEV_WRITE,buf,2))
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{
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ret = -1;
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}
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i2c_end();
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return ret;
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}
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void dac_enable(bool enable)
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{
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dac_enabled = enable;
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dac_config();
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}
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void dac_line_in(bool enable)
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{
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line_in_enabled = enable;
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dac_config();
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}
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void dac_init(void)
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{
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unsigned char buf[2];
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i2c_begin();
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buf[0] = DAC_REG_WRITE | DAC_SR_REG;
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buf[1] = 0x07;
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/* send write command */
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i2c_write(DAC_DEV_WRITE,buf,2);
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i2c_end();
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}
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#endif
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