forked from Minki/linux
623b4ac4bf
Both the original arch/sh/drivers/dma/dma-sh.c and the new SH dmaengine drivers do not take into account bits 3:2 of the Transfer Size field in the CHCR register, besides, bit-field defines set bit 2, but the mask only passes bits 1:0 through. TS_16BLK and TS_32BLK macros are bogus too. This patch fixes all these issues for sh7722 and sh7724, other CPUs stay unchanged and might need to be fixed too. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
#ifndef __ASM_CPU_SH4_DMA_H
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#define __ASM_CPU_SH4_DMA_H
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/* SH7751/7760/7780 DMA IRQ sources */
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#ifdef CONFIG_CPU_SH4A
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#define DMAOR_INIT (DMAOR_DME)
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#include <cpu/dma-sh4a.h>
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#else /* CONFIG_CPU_SH4A */
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/*
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* SH7750/SH7751/SH7760
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*/
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#define DMTE0_IRQ 34
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#define DMTE4_IRQ 44
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#define DMTE6_IRQ 46
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#define DMAE0_IRQ 38
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#define DMAOR_INIT (0x8000|DMAOR_DME)
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#define SH_DMAC_BASE0 0xffa00000
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#define SH_DMAC_BASE1 0xffa00070
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/* Definitions for the SuperH DMAC */
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#define TM_BURST 0x00000080
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#define TS_8 0x00000010
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#define TS_16 0x00000020
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#define TS_32 0x00000030
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#define TS_64 0x00000000
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#define CHCR_TS_LOW_MASK 0x70
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#define CHCR_TS_LOW_SHIFT 4
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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_COD 0x00000008
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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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* Defaults to a 64-bit transfer size.
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*/
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enum {
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XMIT_SZ_8BIT = 1,
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XMIT_SZ_16BIT = 2,
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XMIT_SZ_32BIT = 3,
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XMIT_SZ_64BIT = 0,
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XMIT_SZ_256BIT = 4,
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};
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/*
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* The DMA count is defined as the number of bytes to transfer.
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*/
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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_64BIT] = 3, \
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[XMIT_SZ_256BIT] = 5, \
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}
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#define TS_INDEX2VAL(i) (((i) & 7) << CHCR_TS_LOW_SHIFT)
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#endif
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#endif /* __ASM_CPU_SH4_DMA_H */
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