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Improvements to mini2440/UDA1341 audio

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23478 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Bob Cousins 2009-11-01 22:58:08 +00:00
parent 5d40b9a24a
commit 33040275cf
3 changed files with 109 additions and 17 deletions
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15
firmware/target/arm/s3c2440/mini2440/pcm-mini2440.c
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@ -19,6 +19,7 @@
*
****************************************************************************/
#include <stdlib.h>
#include "config.h"
#include "system.h"
#include "kernel.h"
#include "logf.h"
@ -48,7 +49,7 @@ static struct
static const unsigned char pcm_freq_parms[HW_NUM_FREQ][2] =
{
[HW_FREQ_64] = { 2, IISMOD_MASTER_CLOCK_256FS },
[HW_FREQ_44] = { 3, IISMOD_MASTER_CLOCK_384FS },
[HW_FREQ_44] = { 2, IISMOD_MASTER_CLOCK_384FS },
[HW_FREQ_22] = { 8, IISMOD_MASTER_CLOCK_256FS },
[HW_FREQ_11] = { 17, IISMOD_MASTER_CLOCK_256FS },
};
@ -127,9 +128,12 @@ void pcm_postinit(void)
void pcm_dma_apply_settings(void)
{
#ifdef HAVE_UDA1341
unsigned int reg_val;
/* set prescaler and master clock rate according to freq */
IISPSR = (pcm_freq_parms [pcm_fsel][0] * IISPSR_PRESCALER_A) | pcm_freq_parms [pcm_fsel][0];
IISMOD |= ~IISMOD_MASTER_CLOCK_384FS | pcm_freq_parms [pcm_fsel][1] ;
reg_val = (pcm_freq_parms [pcm_fsel][0] << 5) | pcm_freq_parms [pcm_fsel][0];
IISMOD = (IISMOD & ~IISMOD_MASTER_CLOCK_384FS) | pcm_freq_parms [pcm_fsel][1] ;
IISPSR = reg_val;
#endif
audiohw_set_frequency(pcm_fsel);
@ -156,6 +160,11 @@ static void play_start_pcm(void)
/* turn off the idle */
IISCON &= ~(1<<3);
#ifdef HAVE_UDA1341
IISMOD = (IISMOD & ~IISMOD_MASTER_CLOCK_384FS) | pcm_freq_parms [pcm_fsel][1] ;
IISPSR = (pcm_freq_parms [pcm_fsel][0] << 5) | pcm_freq_parms [pcm_fsel][0];
#endif
/* start the IIS */
IISCON |= (1<<0);
}