Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-12 14:12:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

ARM: shmobile: add common DMAEngine definitions

Browse Source 
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 <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Kuninori Morimoto 2012-06-25 03:43:00 -07:00 committed by Rafael J. Wysocki
parent 4f3d7f65e9
commit 5ca1d44f6a
1 changed files with 84 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
arch/arm/mach-shmobile/include/mach/dma-register.h Normal file
View File

@ -0,0 +1,84 @@
/*
* SH-ARM CPU-specific DMA definitions, used by both DMA drivers
*
* Copyright (C) 2012 Renesas Solutions Corp
*
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* Based on arch/sh/include/cpu-sh4/cpu/dma-register.h
* Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* 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 */