/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Minoura Makoto.
*
* 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.
*
* 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.
*/
/*
* Structure that describes a single transfer.
*/
struct dmac_channel_stat;
struct dmac_dma_xfer {
struct dmac_channel_stat *dx_channel;
bus_dmamap_t dx_dmamap; /* dmamap tag */
bus_dma_tag_t dx_tag; /* dma tag for the transfer */
int dx_ocr; /* direction */
int dx_scr; /* SCR value */
void *dx_device; /* (initial) device address */
#ifdef DMAC_ARRAYCHAIN
struct dmac_sg_array *dx_array; /* DMAC array chain */
int dx_done;
#endif
};
/*
* Struct that holds the channel status.
* Embedded in the device softc for each channel.
*/
struct dmac_channel_stat {
int ch_channel; /* channel number */
char ch_name[8]; /* user device name */
bus_space_handle_t ch_bht; /* bus_space handle */
int ch_dcr; /* device description */
int ch_ocr; /* operation size, request mode */
int ch_normalv; /* normal interrupt vector */
int ch_errorv; /* error interrupt vector */
dmac_intr_handler_t ch_normal; /* normal interrupt handler */
dmac_intr_handler_t ch_error; /* error interrupt handler */
void *ch_normalarg;
void *ch_errorarg;
struct dmac_dma_xfer ch_xfer;
struct dmac_sg_array *ch_map; /* transfer map for arraychain mode */
bus_dma_segment_t ch_seg[1];
struct dmac_softc *ch_softc; /* device softc link */
};
