sys/arch/next68k/dev/nextdmavar.h

   1 /*      $NetBSD: nextdmavar.h,v 1.11.6.2 2005/11/10 13:57:57 skrll 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 *);