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nextdmavar.h revision 1.13 
      1 /*	$NetBSD: nextdmavar.h,v 1.13 2005/06/05 11:35:09 he Exp $	*/
      2 /*
      3  * Copyright (c) 1998 Darrin B. Jewell
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed by Darrin B. Jewell
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 
     33 struct nextdma_channel {
     34 	const char		*nd_name;
     35 	int			nd_base;
     36 	int			nd_size;
     37 	u_long			nd_intr;
     38 	int			(*nd_intrfunc)(void *);
     39 };
     40 
     41 struct nextdma_config {
     42 	/* This is called to get another map to dma */
     43 	bus_dmamap_t		(*nd_continue_cb)(void *);
     44 	/* This is called when a map has completed dma */
     45 	void			(*nd_completed_cb)(bus_dmamap_t, void *);
     46 	/* This is called when dma shuts down */
     47 	void			(*nd_shutdown_cb) (void *);
     48 	/* callback argument */
     49 	void			*nd_cb_arg;
     50 };
     51 
     52 struct nextdma_status {
     53 	bus_dmamap_t	nd_map;			/* map currently in dd_next */
     54 	int		nd_idx;			/* idx of segment currently in dd_next */
     55 	bus_dmamap_t	nd_map_cont;		/* map needed to continue DMA */
     56 	int		nd_idx_cont;		/* segment index to continue DMA */
     57 	int		nd_exception;
     58 };
     59 
     60 struct nextdma_softc {
     61 	struct device		sc_dev;
     62 	struct nextdma_channel	*sc_chan;
     63 	bus_space_handle_t	sc_bsh;		/* bus space handle */
     64 	bus_space_tag_t		sc_bst;		/* bus space tag */
     65 	bus_dma_tag_t		sc_dmat;
     66 	struct nextdma_config	sc_conf;
     67 	struct nextdma_status	sc_stat;
     68 	struct evcnt		sc_intrcnt;
     69 };
     70 
     71 #define nextdma_setconf(nsc, elem, val) nsc->sc_conf.nd_##elem = (val)
     72 
     73 /* Configure the interface & initialize private structure vars */
     74 void nextdma_config(struct nextdma_softc *);
     75 void nextdma_init(struct nextdma_softc *);
     76 void nextdma_start(struct nextdma_softc *, u_long);
     77 
     78 /* query to see if nextdma is finished */
     79 int nextdma_finished(struct nextdma_softc *);
     80 void nextdma_reset(struct nextdma_softc *);
     81 
     82 void nextdma_print(struct nextdma_softc *);
     83 
     84 struct nextdma_softc *nextdma_findchannel(const char *);
     85