diff options
author | Paul Mundt <lethal@linux-sh.org> | 2006-01-17 01:14:09 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-17 02:15:27 -0500 |
commit | 0d831770b154a057562236e8cf50905c8f1ae1b0 (patch) | |
tree | dc25902b29b09838f2fe32e47be53c951a2fa67e /include/asm-sh/cpu-sh4/dma.h | |
parent | 0025835cf20e07056b8521b8c1d7d0bfe07e81f1 (diff) |
[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-sh4/dma.h')
-rw-r--r-- | include/asm-sh/cpu-sh4/dma.h | 52 |
1 files changed, 42 insertions, 10 deletions
diff --git a/include/asm-sh/cpu-sh4/dma.h b/include/asm-sh/cpu-sh4/dma.h index e2b91adf821a..0dfe61f14802 100644 --- a/include/asm-sh/cpu-sh4/dma.h +++ b/include/asm-sh/cpu-sh4/dma.h | |||
@@ -1,17 +1,49 @@ | |||
1 | #ifndef __ASM_CPU_SH4_DMA_H | 1 | #ifndef __ASM_CPU_SH4_DMA_H |
2 | #define __ASM_CPU_SH4_DMA_H | 2 | #define __ASM_CPU_SH4_DMA_H |
3 | 3 | ||
4 | #ifdef CONFIG_CPU_SH4A | ||
5 | #define SH_DMAC_BASE 0xfc808020 | ||
6 | #else | ||
4 | #define SH_DMAC_BASE 0xffa00000 | 7 | #define SH_DMAC_BASE 0xffa00000 |
8 | #endif | ||
5 | 9 | ||
6 | #define SAR ((unsigned long[]){SH_DMAC_BASE + 0x00, SH_DMAC_BASE + 0x10, \ | 10 | /* Definitions for the SuperH DMAC */ |
7 | SH_DMAC_BASE + 0x20, SH_DMAC_BASE + 0x30}) | 11 | #define TM_BURST 0x0000080 |
8 | #define DAR ((unsigned long[]){SH_DMAC_BASE + 0x04, SH_DMAC_BASE + 0x14, \ | 12 | #define TS_8 0x00000010 |
9 | SH_DMAC_BASE + 0x24, SH_DMAC_BASE + 0x34}) | 13 | #define TS_16 0x00000020 |
10 | #define DMATCR ((unsigned long[]){SH_DMAC_BASE + 0x08, SH_DMAC_BASE + 0x18, \ | 14 | #define TS_32 0x00000030 |
11 | SH_DMAC_BASE + 0x28, SH_DMAC_BASE + 0x38}) | 15 | #define TS_64 0x00000000 |
12 | #define CHCR ((unsigned long[]){SH_DMAC_BASE + 0x0c, SH_DMAC_BASE + 0x1c, \ | ||
13 | SH_DMAC_BASE + 0x2c, SH_DMAC_BASE + 0x3c}) | ||
14 | #define DMAOR (SH_DMAC_BASE + 0x40) | ||
15 | 16 | ||
16 | #endif /* __ASM_CPU_SH4_DMA_H */ | 17 | #define CHCR_TS_MASK 0x30 |
18 | #define CHCR_TS_SHIFT 4 | ||
19 | |||
20 | #define DMAOR_COD 0x00000008 | ||
21 | |||
22 | #define DMAOR_INIT ( 0x8000 | DMAOR_DME ) | ||
17 | 23 | ||
24 | /* | ||
25 | * The SuperH DMAC supports a number of transmit sizes, we list them here, | ||
26 | * with their respective values as they appear in the CHCR registers. | ||
27 | * | ||
28 | * Defaults to a 64-bit transfer size. | ||
29 | */ | ||
30 | enum { | ||
31 | XMIT_SZ_64BIT, | ||
32 | XMIT_SZ_8BIT, | ||
33 | XMIT_SZ_16BIT, | ||
34 | XMIT_SZ_32BIT, | ||
35 | XMIT_SZ_256BIT, | ||
36 | }; | ||
37 | |||
38 | /* | ||
39 | * The DMA count is defined as the number of bytes to transfer. | ||
40 | */ | ||
41 | static unsigned int ts_shift[] __attribute__ ((used)) = { | ||
42 | [XMIT_SZ_64BIT] = 3, | ||
43 | [XMIT_SZ_8BIT] = 0, | ||
44 | [XMIT_SZ_16BIT] = 1, | ||
45 | [XMIT_SZ_32BIT] = 2, | ||
46 | [XMIT_SZ_256BIT] = 5, | ||
47 | }; | ||
48 | |||
49 | #endif /* __ASM_CPU_SH4_DMA_H */ | ||