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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Driver for WM8721 audio codec
*
* Based on code from the ipodlinux project - http://ipodlinux.org/
* Adapted for Rockbox in January 2006
*
* Original file: linux/arch/armnommu/mach-ipod/audio.c
*
* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
*
* 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 "logf.h"
#include "system.h"
#include "string.h"
#include "audio.h"
#include "wmcodec.h"
#include "audiohw.h"
#include "i2s.h"
#define IPOD_PCM_LEVEL 0x65 /* -6dB */
/* use zero crossing to reduce clicks during volume changes */
#define VOLUME_ZC_WAIT (1<<7)
const struct sound_settings_info audiohw_settings[] = {
[SOUND_VOLUME] = {"dB", 0, 1, -74, 6, -25},
/* HAVE_SW_TONE_CONTROLS */
[SOUND_BASS] = {"dB", 0, 1, -24, 24, 0},
[SOUND_TREBLE] = {"dB", 0, 1, -24, 24, 0},
[SOUND_BALANCE] = {"%", 0, 1,-100, 100, 0},
[SOUND_CHANNELS] = {"", 0, 1, 0, 5, 0},
[SOUND_STEREO_WIDTH] = {"%", 0, 5, 0, 250, 100},
};
/* convert tenth of dB volume (-730..60) to master volume register value */
int tenthdb2master(int db)
{
/* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
/* 1111111 == +6dB (0x7f) */
/* 1111001 == 0dB (0x79) */
/* 0110000 == -73dB (0x30 */
/* 0101111 == mute (0x2f) */
if (db < VOLUME_MIN) {
return 0x2f;
} else {
return((db/10)+0x30+73);
}
}
/* convert tenth of dB volume (-780..0) to mixer volume register value */
int tenthdb2mixer(int db)
{
if (db < -660) /* 1.5 dB steps */
return (2640 - db) / 15;
else if (db < -600) /* 0.75 dB steps */
return (990 - db) * 2 / 15;
else if (db < -460) /* 0.5 dB steps */
return (460 - db) / 5;
else /* 0.25 dB steps */
return -db * 2 / 5;
}
void audiohw_mute(bool mute)
{
if (mute)
{
/* Set DACMU = 1 to soft-mute the audio DACs. */
wmcodec_write(DAPCTRL, 0x8);
} else {
/* Set DACMU = 0 to soft-un-mute the audio DACs. */
wmcodec_write(DAPCTRL, 0x0);
}
}
/** From ipodLinux **/
static void codec_set_active(int active)
{
/* set active to 0x0 or 0x1 */
if (active) {
wmcodec_write(ACTIVECTRL, 0x01);
} else {
wmcodec_write(ACTIVECTRL, 0x00);
}
}
/* Silently enable / disable audio output */
void audiohw_enable_output(bool enable)
{
if (enable)
{
/* reset the I2S controller into known state */
i2s_reset();
wmcodec_write(RESET, 0x0); /*Reset*/
codec_set_active(0x0);
/* DACSEL=1 */
wmcodec_write(0x4, 0x10);
/* set power register to POWEROFF=0 on OUTPD=0, DACPD=0 */
wmcodec_write(PDCTRL, 0x67);
/* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
/* IWL=00(16 bit) FORMAT=10(I2S format) */
wmcodec_write(AINTFCE, 0x42);
audiohw_set_sample_rate(WM8721_USB24_44100HZ);
/* set the volume to -6dB */
wmcodec_write(LOUTVOL, IPOD_PCM_LEVEL);
wmcodec_write(ROUTVOL, 0x100 | IPOD_PCM_LEVEL);
/* ACTIVE=1 */
codec_set_active(1);
/* 5. Set DACMU = 0 to soft-un-mute the audio DACs. */
wmcodec_write(DAPCTRL, 0x0);
audiohw_mute(0);
} else {
audiohw_mute(1);
}
}
int audiohw_set_master_vol(int vol_l, int vol_r)
{
/* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
/* 1111111 == +6dB */
/* 1111001 == 0dB */
/* 0110000 == -73dB */
/* 0101111 == mute (0x2f) */
wmcodec_write(LOUTVOL, VOLUME_ZC_WAIT | vol_l);
wmcodec_write(ROUTVOL, VOLUME_ZC_WAIT | vol_r);
return 0;
}
/* Nice shutdown of WM8721 codec */
void audiohw_close(void)
{
/* set DACMU=1 DEEMPH=0 */
wmcodec_write(DAPCTRL, 0x8);
/* ACTIVE=0 */
codec_set_active(0x0);
/* set DACSEL=0, MUTEMIC=1 */
wmcodec_write(0x4, 0x2);
/* set POWEROFF=0 OUTPD=0 DACPD=1 */
wmcodec_write(PDCTRL, 0x6f);
/* set POWEROFF=1 OUTPD=1 DACPD=1 */
wmcodec_write(PDCTRL, 0xff);
}
/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
void audiohw_set_nsorder(int order)
{
(void)order;
}
void audiohw_set_sample_rate(int sampling_control)
{
codec_set_active(0x0);
wmcodec_write(SAMPCTRL, sampling_control);
codec_set_active(0x1);
}
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