/* $NetBSD: nextdmavar.h,v 1.14 2005/12/11 12:18:25 christos Exp $ */ /* * Copyright (c) 1998 Darrin B. Jewell * All rights reserved. * * 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 Darrin B. Jewell * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ struct nextdma_channel { const char *nd_name; int nd_base; int nd_size; u_long nd_intr; int (*nd_intrfunc)(void *); }; struct nextdma_config { /* This is called to get another map to dma */ bus_dmamap_t (*nd_continue_cb)(void *); /* This is called when a map has completed dma */ void (*nd_completed_cb)(bus_dmamap_t, void *); /* This is called when dma shuts down */ void (*nd_shutdown_cb) (void *); /* callback argument */ void *nd_cb_arg; }; struct nextdma_status { bus_dmamap_t nd_map; /* map currently in dd_next */ int nd_idx; /* idx of segment currently in dd_next */ bus_dmamap_t nd_map_cont; /* map needed to continue DMA */ int nd_idx_cont; /* segment index to continue DMA */ int nd_exception; }; struct nextdma_softc { struct device sc_dev; struct nextdma_channel *sc_chan; bus_space_handle_t sc_bsh; /* bus space handle */ bus_space_tag_t sc_bst; /* bus space tag */ bus_dma_tag_t sc_dmat; struct nextdma_config sc_conf; struct nextdma_status sc_stat; struct evcnt sc_intrcnt; }; #define nextdma_setconf(nsc, elem, val) nsc->sc_conf.nd_##elem = (val) /* Configure the interface & initialize private structure vars */ void nextdma_config(struct nextdma_softc *); void nextdma_init(struct nextdma_softc *); void nextdma_start(struct nextdma_softc *, u_long); /* query to see if nextdma is finished */ int nextdma_finished(struct nextdma_softc *); void nextdma_reset(struct nextdma_softc *); void nextdma_print(struct nextdma_softc *); struct nextdma_softc *nextdma_findchannel(const char *);