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| author |   Paul Mundt <lethal@linux-sh.org> | 2006-01-16 22:14:09 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-16 23:15:27 -0800 |
| commit | 0d831770b154a057562236e8cf50905c8f1ae1b0 (patch) | |
| tree | dc25902b29b09838f2fe32e47be53c951a2fa67e /include/asm-sh/cpu-sh3 | |
| parent | [PATCH] sh: consolidate hp620/hp680/hp690 targets into hp6xx (diff) | |
| download | linux-dev-0d831770b154a057562236e8cf50905c8f1ae1b0.tar.xz linux-dev-0d831770b154a057562236e8cf50905c8f1ae1b0.zip | |
[PATCH] sh: DMA updates
This extends the current SH DMA API somewhat to support a proper virtual
channel abstraction, and also works to represent this through the driver model
by giving each DMAC its own platform device.
There's also a few other minor changes to support a few new CPU subtypes, and
make TEI generation for the SH DMAC configurable.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-sh/cpu-sh3')
| -rw-r--r-- | include/asm-sh/cpu-sh3/dma.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/include/asm-sh/cpu-sh3/dma.h b/include/asm-sh/cpu-sh3/dma.h index b972e715f9ee..954801b46022 100644 --- a/include/asm-sh/cpu-sh3/dma.h +++ b/include/asm-sh/cpu-sh3/dma.h @@ -3,5 +3,34 @@ #define SH_DMAC_BASE 0xa4000020 -#endif /* __ASM_CPU_SH3_DMA_H */ +/* Definitions for the SuperH DMAC */ +#define TM_BURST 0x00000020 +#define TS_8 0x00000000 +#define TS_16 0x00000008 +#define TS_32 0x00000010 +#define TS_128 0x00000018 + +#define CHCR_TS_MASK 0x18 +#define CHCR_TS_SHIFT 3 + +#define DMAOR_INIT DMAOR_DME +/* + * The SuperH DMAC supports a number of transmit sizes, we list them here, + * with their respective values as they appear in the CHCR registers. + */ +enum { + XMIT_SZ_8BIT, + XMIT_SZ_16BIT, + XMIT_SZ_32BIT, + XMIT_SZ_128BIT, +}; + +static unsigned int ts_shift[] __attribute__ ((used)) = { + [XMIT_SZ_8BIT] = 0, + [XMIT_SZ_16BIT] = 1, + [XMIT_SZ_32BIT] = 2, + [XMIT_SZ_128BIT] = 4, +}; + +#endif /* __ASM_CPU_SH3_DMA_H */ |