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/
usr/
src/
linux-headers-3.0.0-14/
include/
linux/
- drwxr-xr-x
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Viewing file:  sh_dma.h (2.31 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* Header for the new SH dmaengine driver
*
* 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 SH_DMA_H
#define SH_DMA_H
#include <linux/list.h>
#include <linux/dmaengine.h>
/* Used by slave DMA clients to request DMA to/from a specific peripheral */
struct sh_dmae_slave {
unsigned int slave_id; /* Set by the platform */
struct device *dma_dev; /* Set by the platform */
const struct sh_dmae_slave_config *config; /* Set by the driver */
};
struct sh_dmae_regs {
u32 sar; /* SAR / source address */
u32 dar; /* DAR / destination address */
u32 tcr; /* TCR / transfer count */
};
struct sh_desc {
struct sh_dmae_regs hw;
struct list_head node;
struct dma_async_tx_descriptor async_tx;
enum dma_data_direction direction;
dma_cookie_t cookie;
size_t partial;
int chunks;
int mark;
};
struct sh_dmae_slave_config {
unsigned int slave_id;
dma_addr_t addr;
u32 chcr;
char mid_rid;
};
struct sh_dmae_channel {
unsigned int offset;
unsigned int dmars;
unsigned int dmars_bit;
};
struct sh_dmae_pdata {
const struct sh_dmae_slave_config *slave;
int slave_num;
const struct sh_dmae_channel *channel;
int channel_num;
unsigned int ts_low_shift;
unsigned int ts_low_mask;
unsigned int ts_high_shift;
unsigned int ts_high_mask;
const unsigned int *ts_shift;
int ts_shift_num;
u16 dmaor_init;
};
/* DMA register */
#define SAR 0x00
#define DAR 0x04
#define TCR 0x08
#define CHCR 0x0C
#define DMAOR 0x40
/* DMAOR definitions */
#define DMAOR_AE 0x00000004
#define DMAOR_NMIF 0x00000002
#define DMAOR_DME 0x00000001
/* Definitions for the SuperH DMAC */
#define REQ_L 0x00000000
#define REQ_E 0x00080000
#define RACK_H 0x00000000
#define RACK_L 0x00040000
#define ACK_R 0x00000000
#define ACK_W 0x00020000
#define ACK_H 0x00000000
#define ACK_L 0x00010000
#define DM_INC 0x00004000
#define DM_DEC 0x00008000
#define DM_FIX 0x0000c000
#define SM_INC 0x00001000
#define SM_DEC 0x00002000
#define SM_FIX 0x00003000
#define RS_IN 0x00000200
#define RS_OUT 0x00000300
#define TS_BLK 0x00000040
#define TM_BUR 0x00000020
#define CHCR_DE 0x00000001
#define CHCR_TE 0x00000002
#define CHCR_IE 0x00000004
#endif
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