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Fix problem with AMS PCM driver that caused mpegplayer lockup. It pre-decremented the size remaining where it is supposed to be post-decremented by the last transfer size in the callback. Pending callbacks also must be cleared when stopping or pausing a channel if they happened before the lock flag was set.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29059 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2011-01-15 12:13:56 +00:00
parent 27bcc8a8fd
commit bb54c8f315
1 changed files with 16 additions and 4 deletions
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20
firmware/target/arm/as3525/pcm-as3525.c
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@ -37,6 +37,7 @@
static void *dma_start_addr;
static size_t dma_size; /* in 4*32 bits */
static size_t play_sub_size; /* size of subtransfer */
static void dma_callback(void);
static int locked = 0;
static bool is_playing = false;
@ -70,8 +71,7 @@ static void play_start_pcm(void)
if(size > MAX_TRANSFER)
size = MAX_TRANSFER;
dma_size -= size;
dma_start_addr += size;
play_sub_size = size;
clean_dcache_range((void*)addr, size); /* force write back */
dma_enable_channel(1, (void*)addr, (void*)I2SOUT_DATA, DMA_PERI_I2SOUT,
@ -81,6 +81,10 @@ static void play_start_pcm(void)
static void dma_callback(void)
{
dma_size -= play_sub_size;
dma_start_addr += play_sub_size;
play_sub_size = 0; /* Might get called again if locked */
if(locked)
{
play_callback_pending = is_playing;
@ -123,16 +127,22 @@ void pcm_play_dma_stop(void)
bitclr32(&CGU_PERI, CGU_I2SOUT_APB_CLOCK_ENABLE);
CGU_AUDIO &= ~(1<<11);
play_callback_pending = false;
}
void pcm_play_dma_pause(bool pause)
{
is_playing = !pause;
if(pause)
{
is_playing = false;
dma_disable_channel(1);
play_callback_pending = false;
}
else
{
play_start_pcm();
}
}
void pcm_play_dma_init(void)
@ -343,6 +353,8 @@ void pcm_rec_dma_stop(void)
CGU_AUDIO &= ~(1<<11);
bitclr32(&CGU_PERI, CGU_I2SIN_APB_CLOCK_ENABLE |
CGU_I2SOUT_APB_CLOCK_ENABLE);
rec_callback_pending = false;
}