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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
| commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
| tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/sh/include/cpu-sh3/cpu/dma-register.h | |
| parent | Initial commit. (diff) | |
| download | linux-upstream.tar.xz linux-upstream.zip | |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.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 | 38 |
1 files changed, 38 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 000000000..c0f921fb4 --- /dev/null +++ b/arch/sh/include/cpu-sh3/cpu/dma-register.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * SH3 CPU-specific DMA definitions, used by both DMA drivers + * + * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de> + */ +#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 |