45ec8742b1
now uses the DMACSR_READ bit and no longer keeps _nd_dmadir in softc unified transfer cleanup code, now in routine next_dma_finish_xfer() fixed bounds checking on registers after transfer. removed checking for bus errors since the bit is always set on some nexts (specifically, on mourning, a 25mhz 68040 mono slab) fixed a couple of dma bugs involving chaining dma buffers.
69 lines
3.0 KiB
C
69 lines
3.0 KiB
C
/* $NetBSD: nextdmavar.h,v 1.9 1999/08/29 05:56:26 dbj Exp $ */
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/*
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* Copyright (c) 1998 Darrin B. Jewell
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Darrin B. Jewell
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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struct nextdma_config {
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bus_space_tag_t nd_bst; /* bus space tag */
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bus_space_handle_t nd_bsh; /* bus space handle for device */
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u_long nd_intr; /* NEXT_I_ values from cpu.h */
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bus_dma_tag_t nd_dmat;
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/* This is called to get another map to dma */
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bus_dmamap_t (*nd_continue_cb) __P((void *));
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/* This is called when a map has completed dma */
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void (*nd_completed_cb) __P((bus_dmamap_t, void *));
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/* This is called when dma shuts down */
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void (*nd_shutdown_cb) __P((void *));
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void *nd_cb_arg; /* callback argument */
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struct next68k_bus_dma_tag _nd_dmat; /* should probably be elsewhere */
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bus_dmamap_t _nd_map; /* map currently in dd_next */
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int _nd_idx; /* idx of segment currently in dd_next */
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bus_dmamap_t _nd_map_cont; /* map needed to continue DMA */
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int _nd_idx_cont; /* segment index to continue DMA */
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};
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/* Configure the interface & initialize private structure vars */
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void nextdma_config __P((struct nextdma_config *));
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void nextdma_init __P((struct nextdma_config *));
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void nextdma_start __P((struct nextdma_config *, u_long));
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/* query to see if nextdma is finished */
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int nextdma_finished __P(( struct nextdma_config *));
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void nextdma_reset __P((struct nextdma_config *));
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int nextdma_intr __P((void *));
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void next_dma_print __P((struct nextdma_config *));
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