/*      $OpenBSD: edmavar.h,v 1.4 2015/01/22 14:33:01 krw Exp $ */
/*
 * Copyright (c) 2013 Sylvestre Gallon <ccna.syl@gmail.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef __EDMAVAR_H__
#define __EDMAVAR_H__

typedef void (*edma_intr_cb_t)(void *);

/*
 *      EDMA PaRAM dma descriptors
 */
struct edma_param{
        uint32_t                opt;            /* Option */
        uint32_t                src;            /* Ch source */
        uint16_t                acnt;           /* 1st dim count */
        uint16_t                bcnt;           /* 2nd dim count */
        uint32_t                dst;            /* Chan dst addr */
        int16_t                 srcbidx;        /* Src b index */
        int16_t                 dstbidx;        /* Dst b index */
        uint16_t                link;           /* Link addr */
        uint16_t                bcntrld;        /* BCNT reload */
        int16_t                 srccidx;        /* Source C index */
        int16_t                 dstcidx;        /* Dest C index */
        uint16_t                ccnt;           /* 3rd dim count */
        uint16_t                res;            /* Reserved */
} __attribute__((__packed__));

int     edma_intr_dma_en(uint32_t, edma_intr_cb_t, void *); /* en it for chan */
int     edma_intr_dma_dis(uint32_t);                /* disable intr for chan */
int     edma_trig_xfer_man(uint32_t);               /* trig a dma xfer */
int     edma_trig_xfer_by_dev(uint32_t);            /* dma xfer trig by dev */
void    edma_param_write(uint32_t, struct edma_param *);
void    edma_param_read(uint32_t, struct edma_param *);

#endif /* __EDMAVAR_H__ */