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SAMA5D SSC: Needs to account for data offset in audio buffer.

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This commit is contained in:
Gregory Nutt 2014-07-31 19:14:24 -06:00
parent 513329fd24
commit c2c2921901
1 changed files with 13 additions and 8 deletions
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21
arch/arm/src/sama5/sam_ssc.c
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@ -1182,7 +1182,8 @@ static int ssc_rxdma_setup(struct sam_ssc_s *priv)
/* No data received yet */
apb->nbytes = 0;
apb->nbytes = 0;
apb->curbyte = 0;
/* Physical address of the SSC RHR register and of the buffer location
* in RAM.
@ -1551,9 +1552,11 @@ static int ssc_txdma_setup(struct sam_ssc_s *priv)
{
struct sam_buffer_s *bfcontainer;
struct ap_buffer_s *apb;
uintptr_t samp;
uintptr_t paddr;
uintptr_t maddr;
uint32_t timeout;
apb_samp_t nbytes;
bool notimeout;
int ret;
@ -1592,17 +1595,21 @@ static int ssc_txdma_setup(struct sam_ssc_s *priv)
apb = bfcontainer->apb;
DEBUGASSERT(((uintptr_t)apb->samp & 3) == 0);
/* Get the transfer information, accounting for any data offset */
samp = (uintptr_t)&apb->samp[apb->curbyte];
nbytes = apb->nbytes - apb->curbyte;
/* Physical address of the SSC THR register and of the buffer location
* in
* RAM.
* in RAM.
*/
paddr = ssc_physregaddr(priv, SAM_SSC_THR_OFFSET);
maddr = sam_physramaddr((uintptr_t)apb->samp);
maddr = sam_physramaddr(samp);
/* Configure the TX DMA */
sam_dmatxsetup(priv->tx.dma, paddr, maddr, apb->nbytes);
sam_dmatxsetup(priv->tx.dma, paddr, maddr, nbytes);
/* Increment the DMA timeout */
@ -1623,9 +1630,7 @@ static int ssc_txdma_setup(struct sam_ssc_s *priv)
* before starting the DMA.
*/
arch_clean_dcache((uintptr_t)apb->samp,
(uintptr_t)apb->samp + apb->nbytes);
arch_clean_dcache(samp, samp + nbytes);
}
#if 1 /* REVISIT: Chained TX transfers */
while (0);