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rk27xx - add support for i2s in master mode. Based on patch by Andrew Ryabinin

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30746 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Marcin Bukat 2011-10-13 07:09:44 +00:00
parent e8e06f81f9
commit 0dc76136ca
1 changed files with 15 additions and 6 deletions
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21
firmware/target/arm/rk27xx/pcm-rk27xx.c
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@ -130,7 +130,7 @@ static void i2s_init(void)
{
#if defined(HAVE_RK27XX_CODEC)
/* iomux I2S internal */
SCU_IOMUXA_CON &= ~(1<<18); /* i2s external bit */
SCU_IOMUXA_CON &= ~(1<<19); /* i2s external bit */
SCU_IOMUXB_CON &= ~((1<<4) | /* i2s_mclk */
(1<<3) | /* i2s_sdo */
(1<<2) | /* i2s_sdi */
@ -138,7 +138,7 @@ static void i2s_init(void)
(1<<0)); /* i2s_bck */
#else
/* iomux I2S external */
SCU_IOMUXA_CON |= (1<<18); /* i2s external bit */
SCU_IOMUXA_CON |= (1<<19); /* i2s external bit */
SCU_IOMUXB_CON |= ((1<<4) | /* i2s_mclk */
(1<<3) | /* i2s_sdo */
(1<<2) | /* i2s_sdi */
@ -152,14 +152,18 @@ static void i2s_init(void)
/* configure I2S module */
I2S_IER = 0; /* disable all i2s interrupts */
I2S_TXCTL = (1<<16) | /* LRCK/SCLK = 64 */
(4<<8) | /* MCLK/SCLK = 4 */
(1<<4) | /* 16bit samples */
(0<<3) | /* stereo */
(0<<1) | /* I2S IF */
#ifdef CODEC_SLAVE
(1<<0); /* master mode */
#else
(0<<0); /* slave mode */
#endif
/* the fifo is 16x32bits according to my tests
* while the docs state 32x32bits
*/
@ -173,8 +177,13 @@ static void i2s_init(void)
(0<<4) | /* Req1 for Tx fifo */
(1<<3) | /* Req2 for Rx fifo */
(0<<2) | /* normal operation */
(0<<1) | /* start Tx (in master mode) */
(0<<0); /* start Rx (in master mode) */
#ifdef CODEC_SLAVE
(1<<1) | /* start Tx (master mode) */
(1<<0); /* start Rx (master mode) */
#else
(0<<1) | /* not used in slave mode */
(0<<0); /* not used in slave mode */
#endif
}
void pcm_play_dma_init(void)