diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2010-02-11 19:50:14 +0300 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-03-02 05:09:04 +0300 |
| commit | 8b1935e6a36b0967efc593d67ed3aebbfbc1f5b1 (patch) | |
| tree | 811ebd670e9704790625137b4a824e548bded00b /arch/sh/include/cpu-sh3/cpu/dma-register.h | |
| parent | 027811b9b81a6b3ae5aa20c3302897bee9dcf09e (diff) | |
| download | linux-8b1935e6a36b0967efc593d67ed3aebbfbc1f5b1.tar.xz | |
dmaengine: shdma: separate DMA headers.
Separate SH DMA headers into ones, commonly used by both drivers, and ones,
specific to each of them. This will make the future development of the
dmaengine driver easier.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include/cpu-sh3/cpu/dma-register.h')
| -rw-r--r-- | arch/sh/include/cpu-sh3/cpu/dma-register.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/sh/include/cpu-sh3/cpu/dma-register.h b/arch/sh/include/cpu-sh3/cpu/dma-register.h new file mode 100644 index 000000000000..2349e488c9a6 --- /dev/null +++ b/arch/sh/include/cpu-sh3/cpu/dma-register.h @@ -0,0 +1,41 @@ +/* + * SH3 CPU-specific DMA definitions, used by both DMA drivers + * + * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef CPU_DMA_REGISTER_H +#define CPU_DMA_REGISTER_H + +#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 + +/* + * 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, +}; + +/* log2(size / 8) - used to calculate number of transfers */ +#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 |