Viewing file:  dma-register.h (855 B) -rw-r--r--
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/* 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
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