/*      $NetBSD: hpcdma.h,v 1.12 2019/12/27 09:41:49 msaitoh Exp $      */

/*
* Copyright (c) 2001 Wayne Knowles
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Wayne Knowles
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*        This product includes software developed by the NetBSD
*        Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
*    contributors may be used to endorse or promote products derived
*    from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _SGIMIPS_HPC_DMA_H
#define _SGIMIPS_HPC_DMA_H

#include <sys/bus.h>

struct hpc_dma_softc {
       bus_space_tag_t         sc_bst;
       bus_space_handle_t      sc_bsh;
       bus_dma_tag_t           sc_dmat;

       uint32_t                sc_flags;
#define HPCDMA_READ     0x20            /* direction of transfer */
#define HPCDMA_LOADED   0x40            /* bus_dmamap loaded */
#define HPCDMA_ACTIVE   0x80            /* DMA engine is busy */
       uint32_t                sc_dmacmd;
       int                     sc_ndesc;
       bus_dmamap_t            sc_dmamap;
       struct hpc_dma_desc    *sc_desc_kva;    /* Virtual address */
       bus_addr_t              sc_desc_pa;     /* DMA address */
       ssize_t                 sc_dlen;        /* # of bytes transferred */
       struct hpc_values       *hpc;           /* constants for HPC1/3 */
};


void hpcdma_init(struct hpc_attach_args *, struct hpc_dma_softc *, int);
void hpcdma_sglist_create(struct hpc_dma_softc *, bus_dmamap_t);
void hpcdma_cntl(struct hpc_dma_softc *, uint32_t);
void hpcdma_reset(struct hpc_dma_softc *);
void hpcdma_flush(struct hpc_dma_softc *);

#endif /* _SGIMIPS_HPC_DMA_H */