sh_dma.h

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/*
 * Header for the new SH dmaengine driver
 *
 * Copyright (C) 2010 Guennadi Liakhovetski <[email protected]>
 *
 * 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/dmaengine.h>
#include <linux/list.h>
#include <linux/shdma-base.h>
#include <linux/types.h>

struct device;

/* Used by slave DMA clients to request DMA to/from a specific peripheral */
struct sh_dmae_slave {
    struct shdma_slave      shdma_slave;    /* Set by the platform */
};

/*
 * Supplied by platforms to specify, how a DMA channel has to be configured for
 * a certain peripheral
 */
struct sh_dmae_slave_config {
    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;
    unsigned int    chclr_offset;
};

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;
    unsigned int chcr_offset;
    u32 chcr_ie_bit;

    unsigned int dmaor_is_32bit:1;
    unsigned int needs_tend_set:1;
    unsigned int no_dmars:1;
    unsigned int chclr_present:1;
    unsigned int slave_only:1;
};

/* DMA register */
#define SAR 0x00
#define DAR 0x04
#define TCR 0x08
#define CHCR    0x0C
#define DMAOR   0x40

#define TEND    0x18 /* USB-DMAC */

/* 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

bool shdma_chan_filter(struct dma_chan *chan, void *arg);

#endif