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author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2010-09-17 13:48:32 +0900 |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-09-19 16:10:56 +0100 |
commit | b9fde18c0582583cf12a4b1c02f621d3addd0a97 (patch) | |
tree | 87ea07285c93b62ddc7206b0b7e448f058b42c28 /sound/soc/sh/fsi.c | |
parent | c8fe2574cf860ace03785953878c4c7a0190d064 (diff) | |
download | linux-stable-b9fde18c0582583cf12a4b1c02f621d3addd0a97.tar.gz linux-stable-b9fde18c0582583cf12a4b1c02f621d3addd0a97.tar.bz2 linux-stable-b9fde18c0582583cf12a4b1c02f621d3addd0a97.zip |
ASoC: fsi: Add fsi_dma_soft_push/pop function
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/sh/fsi.c')
-rw-r--r-- | sound/soc/sh/fsi.c | 72 |
1 files changed, 54 insertions, 18 deletions
diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c index 07a0350f771e..363b37a603cb 100644 --- a/sound/soc/sh/fsi.c +++ b/sound/soc/sh/fsi.c @@ -348,11 +348,59 @@ static int fsi_get_fifo_residue(struct fsi_priv *fsi, int is_play) return residue; } +/* + * dma function + */ + static u8 *fsi_dma_get_area(struct fsi_priv *fsi) { return fsi->substream->runtime->dma_area + fsi->byte_offset; } +static void fsi_dma_soft_push16(struct fsi_priv *fsi, int size) +{ + u16 *start; + int i; + + start = (u16 *)fsi_dma_get_area(fsi); + + for (i = 0; i < size; i++) + fsi_reg_write(fsi, DODT, ((u32)*(start + i) << 8)); +} + +static void fsi_dma_soft_pop16(struct fsi_priv *fsi, int size) +{ + u16 *start; + int i; + + start = (u16 *)fsi_dma_get_area(fsi); + + for (i = 0; i < size; i++) + *(start + i) = (u16)(fsi_reg_read(fsi, DIDT) >> 8); +} + +static void fsi_dma_soft_push32(struct fsi_priv *fsi, int size) +{ + u32 *start; + int i; + + start = (u32 *)fsi_dma_get_area(fsi); + + for (i = 0; i < size; i++) + fsi_reg_write(fsi, DODT, *(start + i)); +} + +static void fsi_dma_soft_pop32(struct fsi_priv *fsi, int size) +{ + u32 *start; + int i; + + start = (u32 *)fsi_dma_get_area(fsi); + + for (i = 0; i < size; i++) + *(start + i) = fsi_reg_read(fsi, DIDT); +} + /* * irq function */ @@ -500,8 +548,7 @@ static int fsi_data_push(struct fsi_priv *fsi, int startup) int send; int fifo_free; int width; - u8 *start; - int i, over_period; + int over_period; if (!fsi || !fsi->substream || @@ -538,17 +585,12 @@ static int fsi_data_push(struct fsi_priv *fsi, int startup) if (fifo_free < send) send = fifo_free; - start = fsi_dma_get_area(fsi); - switch (width) { case 2: - for (i = 0; i < send; i++) - fsi_reg_write(fsi, DODT, - ((u32)*((u16 *)start + i) << 8)); + fsi_dma_soft_push16(fsi, send); break; case 4: - for (i = 0; i < send; i++) - fsi_reg_write(fsi, DODT, *((u32 *)start + i)); + fsi_dma_soft_push32(fsi, send); break; default: return -EINVAL; @@ -583,8 +625,7 @@ static int fsi_data_pop(struct fsi_priv *fsi, int startup) int free; int fifo_fill; int width; - u8 *start; - int i, over_period; + int over_period; if (!fsi || !fsi->substream || @@ -620,17 +661,12 @@ static int fsi_data_pop(struct fsi_priv *fsi, int startup) if (free < fifo_fill) fifo_fill = free; - start = fsi_dma_get_area(fsi); - switch (width) { case 2: - for (i = 0; i < fifo_fill; i++) - *((u16 *)start + i) = - (u16)(fsi_reg_read(fsi, DIDT) >> 8); + fsi_dma_soft_pop16(fsi, fifo_fill); break; case 4: - for (i = 0; i < fifo_fill; i++) - *((u32 *)start + i) = fsi_reg_read(fsi, DIDT); + fsi_dma_soft_pop32(fsi, fifo_fill); break; default: return -EINVAL; |