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Ingenic Jz4740 PCM driver: add some locking here and there (doesn't fix all PCM issues)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21622 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Maurus Cuelenaere 2009-07-03 11:50:58 +00:00
parent 6dbf4cf827
commit 7f2ddc4923
1 changed files with 64 additions and 57 deletions
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121
firmware/target/mips/ingenic_jz47xx/pcm-jz4740.c
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@ -32,8 +32,6 @@
** Playback DMA transfer
**/
static bool playback_started = false;
static void* playback_address;
void pcm_postinit(void)
{
audiohw_postinit();
@ -64,21 +62,12 @@ void pcm_dma_apply_settings(void)
audiohw_set_frequency(pcm_sampr);
}
static void play_start_pcm(void)
{
__aic_enable_transmit_dma();
__aic_enable_replay();
REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) |= DMAC_DCCSR_EN;
playback_started = true;
}
static void* playback_address;
static inline void set_dma(const void *addr, size_t size)
{
logf("%x %x %d %d %x", (unsigned int)addr, size, (REG_AIC_SR>>24) & 0x20, (REG_AIC_SR>>8) & 0x20, REG_AIC_SR & 0xF);
//__dcache_writeback_all();
__dcache_writeback_all();
REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) = DMAC_DCCSR_NDES;
REG_DMAC_DSAR(DMA_AIC_TX_CHANNEL) = PHYSADDR((unsigned long)addr);
REG_DMAC_DTAR(DMA_AIC_TX_CHANNEL) = PHYSADDR((unsigned long)AIC_DR);
@ -90,27 +79,6 @@ static inline void set_dma(const void *addr, size_t size)
playback_address = (void*)addr;
}
static void play_stop_pcm(void)
{
REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) = (REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) | DMAC_DCCSR_HLT) & ~DMAC_DCCSR_EN;
dma_disable();
__aic_disable_transmit_dma();
__aic_disable_replay();
playback_started = false;
}
void pcm_play_dma_start(const void *addr, size_t size)
{
dma_enable();
set_dma(addr, size);
play_start_pcm();
}
static inline void play_dma_callback(void)
{
unsigned char *start;
@ -130,6 +98,7 @@ static inline void play_dma_callback(void)
}
}
void DMA_CALLBACK(DMA_AIC_TX_CHANNEL)(void) __attribute__ ((section(".icode")));
void DMA_CALLBACK(DMA_AIC_TX_CHANNEL)(void)
{
if (REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) & DMAC_DCCSR_AR)
@ -151,52 +120,90 @@ void DMA_CALLBACK(DMA_AIC_TX_CHANNEL)(void)
}
}
size_t pcm_get_bytes_waiting(void)
void pcm_play_dma_start(const void *addr, size_t size)
{
if(playback_started)
return (REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL) * 16) & ~3;
else
return 0;
}
dma_enable();
const void * pcm_play_dma_get_peak_buffer(int *count)
{
/* TODO */
if(playback_started)
{
*count = REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL) >> 2;
return (void*)(playback_address + ((REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL)*16 + 2) & ~3));
}
else
{
*count = 0;
return NULL;
}
set_dma(addr, size);
__aic_enable_transmit_dma();
__aic_enable_replay();
REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) |= DMAC_DCCSR_EN;
}
void pcm_play_dma_stop(void)
{
play_stop_pcm();
int flags = disable_irq_save();
/* TODO */
REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) = (REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) | DMAC_DCCSR_HLT) & ~DMAC_DCCSR_EN;
dma_disable();
__aic_disable_transmit_dma();
__aic_disable_replay();
restore_irq(flags);
}
static unsigned int play_lock = 0;
void pcm_play_lock(void)
{
/* TODO */
int flags = disable_irq_save();
if (++play_lock == 1)
__dmac_channel_disable_irq(DMA_AIC_TX_CHANNEL);
restore_irq(flags);
}
void pcm_play_unlock(void)
{
/* TODO */
int flags = disable_irq_save();
if (--play_lock == 0)
__dmac_channel_enable_irq(DMA_AIC_TX_CHANNEL);
restore_irq(flags);
}
void pcm_play_dma_pause(bool pause)
{
int flags = disable_irq_save();
if(pause)
REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) &= ~DMAC_DCCSR_EN;
else
REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) |= DMAC_DCCSR_EN;
restore_irq(flags);
}
size_t pcm_get_bytes_waiting(void)
{
return REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) & DMAC_DCCSR_EN ?
(REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL) * 16) & ~3 : 0;
}
const void * pcm_play_dma_get_peak_buffer(int *count)
{
int flags = disable_irq_save();
const void* addr;
if(REG_DMAC_DCCSR(DMA_AIC_TX_CHANNEL) & DMAC_DCCSR_EN)
{
*count = REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL)*16 >> 2;
addr = (const void*)(playback_address + ((REG_DMAC_DTCR(DMA_AIC_TX_CHANNEL)*16 + 2) & ~3));
}
else
{
*count = 0;
addr = NULL;
}
restore_irq(flags);
return addr;
}
void audiohw_close(void)