dma-atmel.h

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/*
 * Header file for the Atmel AHB DMA Controller driver
 *
 * Copyright (C) 2008 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */
#ifndef AT_HDMAC_H
#define AT_HDMAC_H

#include <linux/dmaengine.h>

struct at_dma_platform_data {
    unsigned int    nr_channels;
    dma_cap_mask_t  cap_mask;
};

struct at_dma_slave {
    struct device       *dma_dev;
    u32         cfg;
};


/* Platform-configurable bits in CFG */
#define ATC_SRC_PER(h)      (0xFU & (h))    /* Channel src rq associated with periph handshaking ifc h */
#define ATC_DST_PER(h)      ((0xFU & (h)) <<  4)    /* Channel dst rq associated with periph handshaking ifc h */
#define ATC_SRC_REP     (0x1 <<  8) /* Source Replay Mod */
#define ATC_SRC_H2SEL       (0x1 <<  9) /* Source Handshaking Mod */
#define     ATC_SRC_H2SEL_SW    (0x0 <<  9)
#define     ATC_SRC_H2SEL_HW    (0x1 <<  9)
#define ATC_DST_REP     (0x1 << 12) /* Destination Replay Mod */
#define ATC_DST_H2SEL       (0x1 << 13) /* Destination Handshaking Mod */
#define     ATC_DST_H2SEL_SW    (0x0 << 13)
#define     ATC_DST_H2SEL_HW    (0x1 << 13)
#define ATC_SOD         (0x1 << 16) /* Stop On Done */
#define ATC_LOCK_IF     (0x1 << 20) /* Interface Lock */
#define ATC_LOCK_B      (0x1 << 21) /* AHB Bus Lock */
#define ATC_LOCK_IF_L       (0x1 << 22) /* Master Interface Arbiter Lock */
#define     ATC_LOCK_IF_L_CHUNK (0x0 << 22)
#define     ATC_LOCK_IF_L_BUFFER    (0x1 << 22)
#define ATC_AHB_PROT_MASK   (0x7 << 24) /* AHB Protection */
#define ATC_FIFOCFG_MASK    (0x3 << 28) /* FIFO Request Configuration */
#define     ATC_FIFOCFG_LARGESTBURST    (0x0 << 28)
#define     ATC_FIFOCFG_HALFFIFO        (0x1 << 28)
#define     ATC_FIFOCFG_ENOUGHSPACE     (0x2 << 28)


#endif /* AT_HDMAC_H */