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authorChaithrika U S <chaithrika@ti.com>2009-08-11 16:58:52 -0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-08-13 22:19:35 +0100
commit6a99fb5fb85f267d075310fd30c4bf6f0ae63062 (patch)
tree2a25a4b586058b48b386771ee1522d3f1a037b88 /sound/soc/davinci/davinci-pcm.h
parenta2342ae325bb1f65d90a9f38baab4c9762018a5e (diff)
downloadlinux-6a99fb5fb85f267d075310fd30c4bf6f0ae63062.tar.gz
ASoC: DaVinci: McASP driver enhacements
On DA830/OMAP-L137 and DA850/OMAP-L138 SoCs, the McASP peripheral has FIFO support. This FIFO provides additional data buffering. It also provides tolerance to variation in host/DMA controller response times. The read and write FIFO sizes are 256 bytes each. If FIFO is enabled, the DMA events from McASP are sent to the FIFO which in turn sends DMA requests to the host CPU according to the thresholds programmed. More details of the FIFO operation can be found at http://focus.ti.com/general/docs/lit/getliterature.tsp?literatureNumber= sprufm1&fileType=pdf This patch adds support for FIFO configuration. The platform data has a version field which differentiates the McASP on different SoCs. Signed-off-by: Chaithrika U S <chaithrika@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/davinci/davinci-pcm.h')
-rw-r--r--sound/soc/davinci/davinci-pcm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/soc/davinci/davinci-pcm.h b/sound/soc/davinci/davinci-pcm.h
index eb4287faa3d5..63d96253c73a 100644
--- a/sound/soc/davinci/davinci-pcm.h
+++ b/sound/soc/davinci/davinci-pcm.h
@@ -19,6 +19,7 @@
struct davinci_pcm_dma_params {
char *name; /* stream identifier */
int channel; /* sync dma channel ID */
+ unsigned short acnt;
dma_addr_t dma_addr; /* device physical address for DMA */
enum dma_event_q eventq_no; /* event queue number */
unsigned char data_type; /* xfer data type */