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Initialise mutex before using it in as3525-codec.c, also use mutex for single codec register accesses.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19187 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Bertrik Sikken 2008-11-23 12:24:47 +00:00
parent baf4b6102d
commit 763aacc311
1 changed files with 45 additions and 25 deletions
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70
firmware/target/arm/as3525/as3525-codec.c
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@ -75,6 +75,8 @@ void ascodec_init(void)
I2C2_SLAD0 = AS3514_I2C_ADDR << 1;
I2C2_CNTRL = 0x51;
mutex_init(&as_mtx);
}
@ -88,46 +90,64 @@ static int i2c_busy(void)
/* returns 0 on success, <0 otherwise */
int ascodec_write(unsigned int index, unsigned int value)
{
if (index == 0x21) {
/* prevent setting of the LREG_CP_not bit */
value &= ~(1 << 5);
}
int retval;
ascodec_lock();
/* check if still busy */
if (i2c_busy()) {
return -1;
retval = -1;
}
else {
if (index == AS3514_CVDD_DCDC3) {
/* prevent setting of the LREG_CP_not bit */
value &= ~(1 << 5);
}
/* start transfer */
I2C2_SADDR = index;
I2C2_CNTRL &= ~(1 << 1);
I2C2_DATA = value;
I2C2_DACNT = 1;
/* wait for transfer*/
while (i2c_busy());
retval = 0;
}
/* start transfer */
I2C2_SADDR = index;
I2C2_CNTRL &= ~(1 << 1);
I2C2_DATA = value;
I2C2_DACNT = 1;
/* wait for transfer*/
while (i2c_busy());
return 0;
ascodec_unlock();
return retval;
}
/* returns value read on success, <0 otherwise */
int ascodec_read(unsigned int index)
{
int data;
ascodec_lock();
/* check if still busy */
if (i2c_busy()) {
return -1;
data = -1;
}
else {
/* start transfer */
I2C2_SADDR = index;
I2C2_CNTRL |= (1 << 1);
I2C2_DACNT = 1;
/* wait for transfer*/
while (i2c_busy());
data = I2C2_DATA;
}
/* start transfer */
I2C2_SADDR = index;
I2C2_CNTRL |= (1 << 1);
I2C2_DACNT = 1;
ascodec_unlock();
/* wait for transfer*/
while (i2c_busy());
return I2C2_DATA;
return data;
}
int ascodec_readbytes(int index, int len, unsigned char *data)