39 lines
855 B
C
39 lines
855 B
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* SH3 CPU-specific DMA definitions, used by both DMA drivers
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*
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* Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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*/
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#ifndef CPU_DMA_REGISTER_H
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#define CPU_DMA_REGISTER_H
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#define CHCR_TS_LOW_MASK 0x18
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#define CHCR_TS_LOW_SHIFT 3
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#define CHCR_TS_HIGH_MASK 0
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#define CHCR_TS_HIGH_SHIFT 0
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#define DMAOR_INIT DMAOR_DME
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/*
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* The SuperH DMAC supports a number of transmit sizes, we list them here,
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* with their respective values as they appear in the CHCR registers.
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*/
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enum {
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XMIT_SZ_8BIT,
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XMIT_SZ_16BIT,
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XMIT_SZ_32BIT,
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XMIT_SZ_128BIT,
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};
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/* log2(size / 8) - used to calculate number of transfers */
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#define TS_SHIFT { \
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[XMIT_SZ_8BIT] = 0, \
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[XMIT_SZ_16BIT] = 1, \
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[XMIT_SZ_32BIT] = 2, \
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[XMIT_SZ_128BIT] = 4, \
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}
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#define TS_INDEX2VAL(i) (((i) & 3) << CHCR_TS_LOW_SHIFT)
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#endif
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