From 5ca1d44f6a99b29ab164a06f4ec71950d6939fb5 Mon Sep 17 00:00:00 2001 From: Kuninori Morimoto Date: Mon, 25 Jun 2012 03:43:00 -0700 Subject: [PATCH] ARM: shmobile: add common DMAEngine definitions Current shmobile have DMAEngine specific settings on each CPU code, but SH-ARM DMAC use same value. This patch adds new dma-register.h header to share definitions and reduce a waste of code on SH-ARM architecture. Signed-off-by: Kuninori Morimoto Acked-by: Magnus Damm Signed-off-by: Rafael J. Wysocki --- .../mach-shmobile/include/mach/dma-register.h | 84 +++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 arch/arm/mach-shmobile/include/mach/dma-register.h diff --git a/arch/arm/mach-shmobile/include/mach/dma-register.h b/arch/arm/mach-shmobile/include/mach/dma-register.h new file mode 100644 index 000000000000..97c40bd9b94f --- /dev/null +++ b/arch/arm/mach-shmobile/include/mach/dma-register.h @@ -0,0 +1,84 @@ +/* + * SH-ARM CPU-specific DMA definitions, used by both DMA drivers + * + * Copyright (C) 2012 Renesas Solutions Corp + * + * Kuninori Morimoto + * + * Based on arch/sh/include/cpu-sh4/cpu/dma-register.h + * Copyright (C) 2010 Guennadi Liakhovetski + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef DMA_REGISTER_H +#define DMA_REGISTER_H + +/* + * Direct Memory Access Controller + */ + +/* 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_512BIT = 5, +}; + +/* log2(size / 8) - used to calculate number of transfers */ +static const unsigned int dma_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_512BIT] = 6, +}; + +#define TS_LOW_BIT 0x3 /* --xx */ +#define TS_HI_BIT 0xc /* xx-- */ + +#define TS_LOW_SHIFT (3) +#define TS_HI_SHIFT (20 - 2) /* 2 bits for shifted low TS */ + +#define TS_INDEX2VAL(i) \ + ((((i) & TS_LOW_BIT) << TS_LOW_SHIFT) |\ + (((i) & TS_HI_BIT) << TS_HI_SHIFT)) + +#define CHCR_TX(xmit_sz) (DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL((xmit_sz))) +#define CHCR_RX(xmit_sz) (DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL((xmit_sz))) + + +/* + * USB High-Speed DMAC + */ +/* Transmit sizes and respective CHCR register values */ +enum { + USBTS_XMIT_SZ_8BYTE = 0, + USBTS_XMIT_SZ_16BYTE = 1, + USBTS_XMIT_SZ_32BYTE = 2, +}; + +/* log2(size / 8) - used to calculate number of transfers */ +static const unsigned int dma_usbts_shift[] = { + [USBTS_XMIT_SZ_8BYTE] = 3, + [USBTS_XMIT_SZ_16BYTE] = 4, + [USBTS_XMIT_SZ_32BYTE] = 5, +}; + +#define USBTS_LOW_BIT 0x3 /* --xx */ +#define USBTS_HI_BIT 0x0 /* ---- */ + +#define USBTS_LOW_SHIFT 6 +#define USBTS_HI_SHIFT 0 + +#define USBTS_INDEX2VAL(i) (((i) & 3) << 6) + +#endif /* DMA_REGISTER_H */ -- 2.34.1