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iPod 3G - initial (completely untested) attempt at audio support

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8847 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2006-02-26 15:59:46 +00:00
parent 4b9fbd1687
commit 2f76763d73
7 changed files with 184 additions and 96 deletions
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106
firmware/drivers/wm8731l.c
View file

@ -41,40 +41,46 @@
#include "wm8731l.h"
#include "pcf50605.h"
void wm8731l_reset(void);
#define IPOD_PCM_LEVEL 0x65 /* -6dB */
#define RESET (0x0f<<1)
#define PWRMGMT1 (0x19<<1)
#define PWRMGMT2 (0x1a<<1)
#define AINTFCE (0x07<<1)
#define LOUT1VOL (0x02<<1)
#define ROUT1VOL (0x03<<1)
#define LOUT2VOL (0x28<<1)
#define ROUT2VOL (0x29<<1)
#define LINVOL 0x00
#define RINVOL 0x01
#define LOUTVOL 0x02
#define ROUTVOL 0x03
#define DACCTRL 0x05
#define PWRMGMT 0x06
#define AINTFCE 0x07
#define SAMPCTRL 0x08
#define ACTIVECTRL 0x09
#define RESET 0x0f
int wm8731l_mute(int mute)
void wm8731_write(int reg, int data)
{
ipod_i2c_send(0x1a, (reg<<1) | ((data&0x100)>>8),data&0xff);
}
int wmcodec_mute(int mute)
{
if (mute)
{
/* Set DACMU = 1 to soft-mute the audio DACs. */
ipod_i2c_send(0x1a, 0xa, 0x8);
wm8731_write(DACCTRL, 0x8);
} else {
/* Set DACMU = 0 to soft-un-mute the audio DACs. */
ipod_i2c_send(0x1a, 0xa, 0x0);
wm8731_write(DACCTRL, 0x0);
}
return 0;
}
/** From ipodLinux **/
static void codec_set_active(int active)
{
/* set active to 0x0 or 0x1 */
if (active) {
ipod_i2c_send(0x1a, 0x12, 0x01);
wm8731_write(ACTIVECTRL, 0x01);
} else {
ipod_i2c_send(0x1a, 0x12, 0x00);
wm8731_write(ACTIVECTRL, 0x00);
}
}
@ -102,7 +108,7 @@ static void i2s_reset(void)
* Initialise the WM8975 for playback via headphone and line out.
* Note, I'm using the WM8750 datasheet as its apparently close.
*/
int wm8731l_init(void) {
int wmcodec_init(void) {
/* reset I2C */
i2c_init();
@ -134,64 +140,61 @@ int wm8731l_init(void) {
}
/* Silently enable / disable audio output */
void wm8731l_enable_output(bool enable)
void wmcodec_enable_output(bool enable)
{
if (enable)
{
/* reset the I2S controller into known state */
i2s_reset();
ipod_i2c_send(0x1a, 0x1e, 0x0); /*Reset*/
wm8731_write(RESET, 0x0); /*Reset*/
codec_set_active(0x0);
/* DACSEL=1 */
/* BYPASS=1 */
ipod_i2c_send(0x1a, 0x8, 0x18);
wm8731_write(0x4, 0x18);
/* set power register to POWEROFF=0 on OUTPD=0, DACPD=0 */
ipod_i2c_send(0x1a, 0xc, 0x67);
wm8731_write(PWRMGMT, 0x67);
/* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
/* IWL=00(16 bit) FORMAT=10(I2S format) */
ipod_i2c_send(0x1a, 0xe, 0x42);
wm8731_write(AINTFCE, 0x42);
wm8731l_set_sample_rate(WM8731L_44100HZ);
wmcodec_set_sample_rate(WM8731L_44100HZ);
/* set the volume to -6dB */
ipod_i2c_send(0x1a, 0x4, IPOD_PCM_LEVEL);
ipod_i2c_send(0x1a, 0x6 | 0x1, IPOD_PCM_LEVEL);
wm8731_write(LOUTVOL, IPOD_PCM_LEVEL);
wm8731_write(ROUTVOL, 0x100 | IPOD_PCM_LEVEL);
/* ACTIVE=1 */
codec_set_active(1);
/* 5. Set DACMU = 0 to soft-un-mute the audio DACs. */
ipod_i2c_send(0x1a, 0xa, 0x0);
wm8731_write(DACCTRL, 0x0);
wm8731l_mute(0);
wmcodec_mute(0);
} else {
wm8731l_mute(1);
wmcodec_mute(1);
}
}
int wm8731l_set_master_vol(int vol_l, int vol_r)
int wmcodec_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) */
if (vol_l == vol_r) {
ipod_i2c_send(0x1a, 0x4 | 0x1, vol_l);
} else {
ipod_i2c_send(0x1a, 0x4, vol_l);
ipod_i2c_send(0x1a, 0x6, vol_r);
}
wm8731_write(LOUTVOL, vol_l);
wm8731_write(ROUTVOL, vol_r);
return 0;
}
int wm8975_set_mixer_vol(int channel1, int channel2)
int wmcodec_set_mixer_vol(int channel1, int channel2)
{
(void)channel1;
(void)channel2;
@ -199,70 +202,69 @@ int wm8975_set_mixer_vol(int channel1, int channel2)
return 0;
}
void wm8731l_set_bass(int value)
void wmcodec_set_bass(int value)
{
(void)value;
}
void wm8731l_set_treble(int value)
void wmcodec_set_treble(int value)
{
(void)value;
}
/* Nice shutdown of WM8975 codec */
void wm8731l_close(void)
/* Nice shutdown of WM8731 codec */
void wmcodec_close(void)
{
/* set DACMU=1 DEEMPH=0 */
ipod_i2c_send(0x1a, 0xa, 0x8);
wm8731_write(DACCTRL, 0x8);
/* ACTIVE=0 */
codec_set_active(0x0);
/* line in mute left & right*/
ipod_i2c_send(0x1a, 0x0 | 0x1, 0x80);
wm8731_write(LINVOL, 0x100 | 0x80);
/* set DACSEL=0, MUTEMIC=1 */
ipod_i2c_send(0x1a, 0x8, 0x2);
wm8731_write(0x4, 0x2);
/* set POWEROFF=0 OUTPD=0 DACPD=1 */
ipod_i2c_send(0x1a, 0xc, 0x6f);
wm8731_write(PWRMGMT, 0x6f);
/* set POWEROFF=1 OUTPD=1 DACPD=1 */
ipod_i2c_send(0x1a, 0xc, 0xff);
wm8731_write(PWRMGMT, 0xff);
}
/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
void wm8731l_set_nsorder(int order)
void wmcodec_set_nsorder(int order)
{
(void)order;
}
/* */
void wm8731l_set_sample_rate(int sampling_control)
void wmcodec_set_sample_rate(int sampling_control)
{
codec_set_active(0x0);
ipod_i2c_send(0x1a, 0x10, sampling_control);
wm8731_write(SAMPCTRL, sampling_control);
codec_set_active(0x1);
}
void wm8731l_enable_recording(bool source_mic)
void wmcodec_enable_recording(bool source_mic)
{
(void)source_mic;
}
void wm8731l_disable_recording(void)
void wmcodec_disable_recording(void)
{
}
void wm8731l_set_recvol(int left, int right, int type)
void wmcodec_set_recvol(int left, int right, int type)
{
(void)left;
(void)right;
(void)type;
}
void wm8731l_set_monitor(int enable)
void wmcodec_set_monitor(int enable)
{
(void)enable;
}