diff options
| author | Marek Vasut | 2012-03-15 18:33:18 +0000 |
|---|---|---|
| committer | Albert ARIBAUD | 2012-03-29 07:56:25 +0200 |
| commit | c3dfe7077630aa5f81d499c08964005d204c2b3b (patch) | |
| tree | bc6969d3b5a07ea4d402f84d2957d74f3a4982f4 /drivers/dma/apbh_dma.c | |
| parent | a4aaad704827616a94c76f0a8efe06555c363545 (diff) | |
i.MX28: Add cache support into the APBH DMA driver
The desc_append() now flushes descriptors into RAM.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'drivers/dma/apbh_dma.c')
| -rw-r--r-- | drivers/dma/apbh_dma.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/dma/apbh_dma.c b/drivers/dma/apbh_dma.c index e85f5fe6d21..c086629b0a9 100644 --- a/drivers/dma/apbh_dma.c +++ b/drivers/dma/apbh_dma.c @@ -93,6 +93,21 @@ static int mxs_dma_read_semaphore(int channel) return tmp; } +#ifndef CONFIG_SYS_DCACHE_OFF +void mxs_dma_flush_desc(struct mxs_dma_desc *desc) +{ + uint32_t addr; + uint32_t size; + + addr = (uint32_t)desc; + size = roundup(sizeof(struct mxs_dma_desc), MXS_DMA_ALIGNMENT); + + flush_dcache_range(addr, addr + size); +} +#else +inline void mxs_dma_flush_desc(struct mxs_dma_desc *desc) {} +#endif + /* * Enable a DMA channel. * @@ -329,8 +344,10 @@ static int mxs_dma_release(int channel) struct mxs_dma_desc *mxs_dma_desc_alloc(void) { struct mxs_dma_desc *pdesc; + uint32_t size; - pdesc = memalign(MXS_DMA_ALIGNMENT, sizeof(struct mxs_dma_desc)); + size = roundup(sizeof(struct mxs_dma_desc), MXS_DMA_ALIGNMENT); + pdesc = memalign(MXS_DMA_ALIGNMENT, size); if (pdesc == NULL) return NULL; @@ -415,12 +432,16 @@ int mxs_dma_desc_append(int channel, struct mxs_dma_desc *pdesc) last->cmd.next = mxs_dma_cmd_address(pdesc); last->cmd.data |= MXS_DMA_DESC_CHAIN; + + mxs_dma_flush_desc(last); } pdesc->flags |= MXS_DMA_DESC_READY; if (pdesc->flags & MXS_DMA_DESC_FIRST) pchan->pending_num++; list_add_tail(&pdesc->node, &pchan->active); + mxs_dma_flush_desc(pdesc); + return ret; } |