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Some cosmetic cleaning of the wm8975 audio driver

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8667 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2006-02-12 17:18:47 +00:00
parent 4be839e9e4
commit 6ffd3cfca4
2 changed files with 54 additions and 39 deletions
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73
firmware/drivers/wm8975.c
View file

@ -45,16 +45,6 @@ void wm8975_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)
/*
* Reset the I2S BIT.FORMAT I2S, 16bit, FIFO.FORMAT 32bit
*/
@ -83,6 +73,11 @@ static void i2s_reset(void)
outl(inl(0x7000280c) | 0x1100, 0x7000280c);
}
void wm8975_write(int reg, int data)
{
ipod_i2c_send(0x1a, (reg<<1) | ((data&0x100)>>8),data&0xff);
}
/*
* Initialise the WM8975 for playback via headphone and line out.
* Note, I'm using the WM8750 datasheet as its apparently close.
@ -129,39 +124,39 @@ void wm8975_enable_output(bool enable)
* and Headphone outputs are all OFF (DACMU = 1 Power
* Management registers 1 and 2 are all zeros).
*/
ipod_i2c_send(0x1a, RESET | 1, 0xff); /*Reset*/
ipod_i2c_send(0x1a, RESET, 0x0);
wm8975_write(RESET, 0x1ff); /*Reset*/
wm8975_write(RESET, 0x0);
/* 2. Enable Vmid and VREF. */
ipod_i2c_send(0x1a, PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/
wm8975_write(PWRMGMT1, 0xc0); /*Pwr Mgmt(1)*/
/* 3. Enable DACs as required. */
ipod_i2c_send(0x1a, PWRMGMT2 | 0x1, 0x80); /*Pwr Mgmt(2)*/
wm8975_write(PWRMGMT2, 0x180); /*Pwr Mgmt(2)*/
/* 4. Enable line and / or headphone output buffers as required. */
ipod_i2c_send(0x1a, PWRMGMT2 | 0x1, 0xf8); /*Pwr Mgmt(2)*/
wm8975_write(PWRMGMT2, 0x1f8); /*Pwr Mgmt(2)*/
/* 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, AINTFCE, 0x42);
wm8975_write(AINTFCE, 0x42);
/* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */
wm8975_set_sample_rate(WM8975_44100HZ);
/* set the volume to -6dB */
ipod_i2c_send(0x1a, LOUT1VOL, IPOD_PCM_LEVEL);
ipod_i2c_send(0x1a, ROUT1VOL | 0x1, IPOD_PCM_LEVEL);
ipod_i2c_send(0x1a, LOUT1VOL, IPOD_PCM_LEVEL);
ipod_i2c_send(0x1a, ROUT1VOL | 0x1, IPOD_PCM_LEVEL);
wm8975_write(LOUT1VOL, IPOD_PCM_LEVEL);
wm8975_write(ROUT1VOL,0x100 | IPOD_PCM_LEVEL);
wm8975_write(LOUT1VOL, IPOD_PCM_LEVEL);
wm8975_write(ROUT1VOL,0x100 | IPOD_PCM_LEVEL);
wm8975_write(LOUTMIX1, 0x150); /* Left out Mix(def) */
wm8975_write(LOUTMIX2, 0x50);
ipod_i2c_send(0x1a, 0x45, 0x50); /* Left out Mix(def) */
ipod_i2c_send(0x1a, 0x46, 0x50);
wm8975_write(ROUTMIX1, 0x50); /* Right out Mix(def) */
wm8975_write(ROUTMIX2, 0x150);
ipod_i2c_send(0x1a, 0x48, 0x50); /* Right out Mix(def) */
ipod_i2c_send(0x1a, 0x4b, 0x50);
ipod_i2c_send(0x1a, 0x4c, 0x0); /* Mono out Mix */
ipod_i2c_send(0x1a, 0x4e, 0x0);
wm8975_write(MOUTMIX1, 0x0); /* Mono out Mix */
wm8975_write(MOUTMIX2, 0x0);
wm8975_mute(0);
} else {
@ -178,12 +173,12 @@ int wm8975_set_master_vol(int vol_l, int vol_r)
/* 0101111 == mute (0x2f) */
/* OUT1 */
ipod_i2c_send(0x1a, LOUT1VOL, vol_l);
ipod_i2c_send(0x1a, ROUT1VOL | 0x1, vol_r);
wm8975_write(LOUT1VOL, vol_l);
wm8975_write(ROUT1VOL, 0x100 | vol_r);
/* OUT2 */
ipod_i2c_send(0x1a, LOUT2VOL, vol_l);
ipod_i2c_send(0x1a, ROUT2VOL | 0x1, vol_r);
wm8975_write(LOUT2VOL, vol_l);
wm8975_write(ROUT2VOL, 0x100 | vol_r);
return 0;
}
@ -203,7 +198,7 @@ void wm8975_set_bass(int value)
if ((value >= -6) && (value <= 9)) {
/* We use linear bass control with 130Hz cutoff */
ipod_i2c_send(0x1a, 0x0c << 1, regvalues[value+6]);
wm8975_write(BASSCTRL, regvalues[value+6]);
}
}
@ -213,7 +208,7 @@ void wm8975_set_treble(int value)
if ((value >= -6) && (value <= 9)) {
/* We use a 8Khz cutoff */
ipod_i2c_send(0x1a, 0x0d << 1, regvalues[value+6]);
wm8975_write(TREBCTRL, regvalues[value+6]);
}
}
@ -222,10 +217,10 @@ int wm8975_mute(int mute)
if (mute)
{
/* Set DACMU = 1 to soft-mute the audio DACs. */
ipod_i2c_send(0x1a, 0xa, 0x8);
wm8975_write(DACCTRL, 0x8);
} else {
/* Set DACMU = 0 to soft-un-mute the audio DACs. */
ipod_i2c_send(0x1a, 0xa, 0x0);
wm8975_write(DACCTRL, 0x0);
}
return 0;
@ -235,13 +230,13 @@ int wm8975_mute(int mute)
void wm8975_close(void)
{
/* 1. Set DACMU = 1 to soft-mute the audio DACs. */
ipod_i2c_send(0x1a, 0xa, 0x8);
wm8975_write(DACCTRL, 0x8);
/* 2. Disable all output buffers. */
ipod_i2c_send(0x1a, 0x34, 0x0); /*Pwr Mgmt(2)*/
wm8975_write(PWRMGMT2, 0x0); /*Pwr Mgmt(2)*/
/* 3. Switch off the power supplies. */
ipod_i2c_send(0x1a, 0x32, 0x0); /*Pwr Mgmt(1)*/
wm8975_write(PWRMGMT1, 0x0); /*Pwr Mgmt(1)*/
}
/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
@ -253,7 +248,7 @@ void wm8975_set_nsorder(int order)
/* Note: Disable output before calling this function */
void wm8975_set_sample_rate(int sampling_control) {
ipod_i2c_send(0x1a, 0x10, sampling_control);
wm8975_write(0x08, sampling_control);
}

20
firmware/export/wm8975.h
View file

@ -37,6 +37,26 @@ extern void wm8975_disable_recording(void);
extern void wm8975_set_recvol(int left, int right, int type);
extern void wm8975_set_monitor(int enable);
/* Register addresses */
#define LOUT1VOL 0x02
#define ROUT1VOL 0x03
#define DACCTRL 0x05
#define AINTFCE 0x07
#define BASSCTRL 0x0c
#define TREBCTRL 0x0d
#define RESET 0x0f
#define PWRMGMT1 0x19
#define PWRMGMT2 0x1a
#define LOUTMIX1 0x22
#define LOUTMIX2 0x23
#define ROUTMIX1 0x24
#define ROUTMIX2 0x25
#define MOUTMIX1 0x26
#define MOUTMIX2 0x27
#define LOUT2VOL 0x28
#define ROUT2VOL 0x29
/* Register settings for the supported samplerates: */
#define WM8975_8000HZ 0x4d
#define WM8975_12000HZ 0x61