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iPod Classic/6G: PCM support for all CS42L55 rates

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pcm_dma_apply_settings(): sets the configured PCM frequency,
all native CS42L55 sample rates are available.

Change-Id: I2fcd5581457a669c3044516804cb64fb972218d0
This commit is contained in:
Cástor Muñoz 2013-01-09 21:44:23 +01:00
parent 17e57e3291
commit 758a3ae4bb
2 changed files with 14 additions and 6 deletions
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2
firmware/export/s5l8702.h
View file

@ -807,7 +807,7 @@ struct dma_lli
#define I2SRXCOM (*((volatile uint32_t*)(0x3CA00034)))
#define I2SRXDB (*((volatile uint32_t*)(0x3CA00038)))
#define I2SSTATUS (*((volatile uint32_t*)(0x3CA0003C)))
#define I2S40 (*((volatile uint32_t*)(0x3CA00040)))
#define I2SCLKDIV (*((volatile uint32_t*)(0x3CA00040)))
/////CLOCK GATES/////

18
firmware/target/arm/s5l8702/pcm-s5l8702.c
View file

@ -139,16 +139,28 @@ void pcm_play_dma_pause(bool pause)
else I2STXCOM &= ~1;
}
/* MCLK = 12MHz (MCLKDIV2=1), [CS42L55 DS, s4.8] */
#define MCLK_FREQ 12000000
/* set the configured PCM frequency */
void pcm_dma_apply_settings(void)
{
/* configure I2S clock ratio */
I2SCLKDIV = MCLK_FREQ / hw_freq_sampr[pcm_fsel];
/* select CS42L55 sample rate */
audiohw_set_frequency(pcm_fsel);
}
void pcm_play_dma_init(void)
{
PWRCON(0) &= ~(1 << 4);
PWRCON(1) &= ~(1 << 7);
I2S40 = 0x110;
I2STXCON = 0xb100019;
I2SCLKCON = 1;
VIC0INTENABLE = 1 << IRQ_DMAC0;
audiohw_preinit();
pcm_dma_apply_settings();
}
void pcm_play_dma_postinit(void)
@ -156,10 +168,6 @@ void pcm_play_dma_postinit(void)
audiohw_postinit();
}
void pcm_dma_apply_settings(void)
{
}
size_t pcm_get_bytes_waiting(void)
{
int bytes = pcm_remaining;