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Diffstat (limited to '')
| -rw-r--r-- | arch/sh/include/cpu-sh4/cpu/dma-register.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/sh/include/cpu-sh4/cpu/dma-register.h b/arch/sh/include/cpu-sh4/cpu/dma-register.h new file mode 100644 index 000000000..53f7ab990 --- /dev/null +++ b/arch/sh/include/cpu-sh4/cpu/dma-register.h @@ -0,0 +1,98 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * SH4 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 + +/* SH7751/7760/7780 DMA IRQ sources */ + +#ifdef CONFIG_CPU_SH4A + +#define DMAOR_INIT DMAOR_DME + +#if defined(CONFIG_CPU_SUBTYPE_SH7343) +#define CHCR_TS_LOW_MASK 0x00000018 +#define CHCR_TS_LOW_SHIFT 3 +#define CHCR_TS_HIGH_MASK 0 +#define CHCR_TS_HIGH_SHIFT 0 +#elif defined(CONFIG_CPU_SUBTYPE_SH7722) || \ + defined(CONFIG_CPU_SUBTYPE_SH7723) || \ + defined(CONFIG_CPU_SUBTYPE_SH7724) || \ + defined(CONFIG_CPU_SUBTYPE_SH7730) || \ + defined(CONFIG_CPU_SUBTYPE_SH7786) +#define CHCR_TS_LOW_MASK 0x00000018 +#define CHCR_TS_LOW_SHIFT 3 +#define CHCR_TS_HIGH_MASK 0x00300000 +#define CHCR_TS_HIGH_SHIFT (20 - 2) /* 2 bits for shifted low TS */ +#elif defined(CONFIG_CPU_SUBTYPE_SH7757) || \ + defined(CONFIG_CPU_SUBTYPE_SH7763) || \ + defined(CONFIG_CPU_SUBTYPE_SH7780) || \ + defined(CONFIG_CPU_SUBTYPE_SH7785) +#define CHCR_TS_LOW_MASK 0x00000018 +#define CHCR_TS_LOW_SHIFT 3 +#define CHCR_TS_HIGH_MASK 0x00100000 +#define CHCR_TS_HIGH_SHIFT (20 - 2) /* 2 bits for shifted low TS */ +#endif + +/* Transmit sizes and respective CHCR register values */ +enum { + XMIT_SZ_8BIT = 0, + XMIT_SZ_16BIT = 1, + XMIT_SZ_32BIT = 2, + XMIT_SZ_64BIT = 7, + XMIT_SZ_128BIT = 3, + XMIT_SZ_256BIT = 4, + XMIT_SZ_128BIT_BLK = 0xb, + XMIT_SZ_256BIT_BLK = 0xc, +}; + +/* 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_64BIT] = 3, \ + [XMIT_SZ_128BIT] = 4, \ + [XMIT_SZ_256BIT] = 5, \ + [XMIT_SZ_128BIT_BLK] = 4, \ + [XMIT_SZ_256BIT_BLK] = 5, \ +} + +#define TS_INDEX2VAL(i) ((((i) & 3) << CHCR_TS_LOW_SHIFT) | \ + (((i) & 0xc) << CHCR_TS_HIGH_SHIFT)) + +#else /* CONFIG_CPU_SH4A */ + +#define DMAOR_INIT (0x8000 | DMAOR_DME) + +#define CHCR_TS_LOW_MASK 0x70 +#define CHCR_TS_LOW_SHIFT 4 +#define CHCR_TS_HIGH_MASK 0 +#define CHCR_TS_HIGH_SHIFT 0 + +/* Transmit sizes and respective CHCR register values */ +enum { + XMIT_SZ_8BIT = 1, + XMIT_SZ_16BIT = 2, + XMIT_SZ_32BIT = 3, + XMIT_SZ_64BIT = 0, + XMIT_SZ_256BIT = 4, +}; + +/* 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_64BIT] = 3, \ + [XMIT_SZ_256BIT] = 5, \ +} + +#define TS_INDEX2VAL(i) (((i) & 7) << CHCR_TS_LOW_SHIFT) + +#endif /* CONFIG_CPU_SH4A */ + +#endif |