1 /* $NetBSD: nextdmavar.h,v 1.11 2002/09/11 01:46:32 mycroft 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 char *nd_name; 35 int nd_base; 36 int nd_size; 37 u_long nd_intr; 38 int (*nd_intrfunc) __P((void *)); 39 }; 40 41 struct nextdma_config { 42 /* This is called to get another map to dma */ 43 bus_dmamap_t (*nd_continue_cb) __P((void *)); 44 /* This is called when a map has completed dma */ 45 void (*nd_completed_cb) __P((bus_dmamap_t, void *)); 46 /* This is called when dma shuts down */ 47 void (*nd_shutdown_cb) __P((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 __P((struct nextdma_softc *)); 75 void nextdma_init __P((struct nextdma_softc *)); 76 void nextdma_start __P((struct nextdma_softc *, u_long)); 77 78 /* query to see if nextdma is finished */ 79 int nextdma_finished __P((struct nextdma_softc *)); 80 void nextdma_reset __P((struct nextdma_softc *)); 81 82 void nextdma_print __P((struct nextdma_softc *)); 83 84 struct nextdma_softc *nextdma_findchannel __P((char *)); 85