diff options
| author |   Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2010-02-03 14:44:12 +0000 |
|---|---|---|
| committer |   Paul Mundt <lethal@linux-sh.org> | 2010-02-08 09:40:24 +0900 |
| commit | 623b4ac4bf9e767991c66e29b47dd4b19458fb42 (patch) | |
| tree | 9cf9c5ef8ac1ab714a35db1baf627fb701a98287 /arch/sh/include/cpu-sh3/cpu/dma.h | |
| parent | sh: prepare the DMA driver for slave functionality (diff) | |
| download | linux-dev-623b4ac4bf9e767991c66e29b47dd4b19458fb42.tar.xz linux-dev-623b4ac4bf9e767991c66e29b47dd4b19458fb42.zip | |
sh: fix Transfer Size calculation in both DMA drivers
Both the original arch/sh/drivers/dma/dma-sh.c and the new SH dmaengine drivers
do not take into account bits 3:2 of the Transfer Size field in the CHCR
register, besides, bit-field defines set bit 2, but the mask only passes bits
1:0 through. TS_16BLK and TS_32BLK macros are bogus too. This patch fixes all
these issues for sh7722 and sh7724, other CPUs stay unchanged and might need to
be fixed too.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include/cpu-sh3/cpu/dma.h')
| -rw-r--r-- | arch/sh/include/cpu-sh3/cpu/dma.h | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/arch/sh/include/cpu-sh3/cpu/dma.h b/arch/sh/include/cpu-sh3/cpu/dma.h index 0ea15f3f2363..207811a7a650 100644 --- a/arch/sh/include/cpu-sh3/cpu/dma.h +++ b/arch/sh/include/cpu-sh3/cpu/dma.h @@ -20,8 +20,10 @@ #define TS_32 0x00000010 #define TS_128 0x00000018 -#define CHCR_TS_MASK 0x18 -#define CHCR_TS_SHIFT 3 +#define CHCR_TS_LOW_MASK 0x18 +#define CHCR_TS_LOW_SHIFT 3 +#define CHCR_TS_HIGH_MASK 0 +#define CHCR_TS_HIGH_SHIFT 0 #define DMAOR_INIT DMAOR_DME @@ -36,11 +38,13 @@ enum { XMIT_SZ_128BIT, }; -static unsigned int ts_shift[] __maybe_unused = { - [XMIT_SZ_8BIT] = 0, - [XMIT_SZ_16BIT] = 1, - [XMIT_SZ_32BIT] = 2, - [XMIT_SZ_128BIT] = 4, -}; +#define TS_SHIFT { \ + [XMIT_SZ_8BIT] = 0, \ + [XMIT_SZ_16BIT] = 1, \ + [XMIT_SZ_32BIT] = 2, \ + [XMIT_SZ_128BIT] = 4, \ +} + +#define TS_INDEX2VAL(i) (((i) & 3) << CHCR_TS_LOW_SHIFT) #endif /* __ASM_CPU_SH3_DMA_H */ |