dmacvar.h revision 1.3
1 1.3 minoura /* $NetBSD: dmacvar.h,v 1.3 2001/04/30 05:47:31 minoura Exp $ */ 2 1.2 minoura 3 1.2 minoura /*- 4 1.2 minoura * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 1.2 minoura * All rights reserved. 6 1.2 minoura * 7 1.2 minoura * This code is derived from software contributed to The NetBSD Foundation 8 1.2 minoura * by Minoura Makoto. 9 1.2 minoura * 10 1.2 minoura * Redistribution and use in source and binary forms, with or without 11 1.2 minoura * modification, are permitted provided that the following conditions 12 1.2 minoura * are met: 13 1.2 minoura * 1. Redistributions of source code must retain the above copyright 14 1.2 minoura * notice, this list of conditions and the following disclaimer. 15 1.2 minoura * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 minoura * notice, this list of conditions and the following disclaimer in the 17 1.2 minoura * documentation and/or other materials provided with the distribution. 18 1.2 minoura * 3. All advertising materials mentioning features or use of this software 19 1.2 minoura * must display the following acknowledgement: 20 1.2 minoura * This product includes software developed by the NetBSD 21 1.2 minoura * Foundation, Inc. and its contributors. 22 1.2 minoura * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2 minoura * contributors may be used to endorse or promote products derived 24 1.2 minoura * from this software without specific prior written permission. 25 1.2 minoura * 26 1.2 minoura * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2 minoura * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2 minoura * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2 minoura * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2 minoura * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2 minoura * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2 minoura * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2 minoura * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2 minoura * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2 minoura * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2 minoura * POSSIBILITY OF SUCH DAMAGE. 37 1.2 minoura */ 38 1.2 minoura 39 1.2 minoura /* 40 1.2 minoura * Hitachi HD63450 (= Motorola MC68450) DMAC driver for x68k. 41 1.2 minoura */ 42 1.2 minoura 43 1.2 minoura #include <dev/ic/mc68450reg.h> 44 1.3 minoura #include <machine/bus.h> 45 1.2 minoura 46 1.3 minoura #define DMAC_MAPSIZE 64 47 1.2 minoura 48 1.2 minoura typedef int (*dmac_intr_handler_t) __P((void*)); 49 1.2 minoura 50 1.2 minoura /* 51 1.3 minoura * Structure that describes a single transfer. 52 1.3 minoura */ 53 1.3 minoura struct dmac_channel_stat; 54 1.3 minoura struct dmac_dma_xfer { 55 1.3 minoura struct dmac_channel_stat *dx_channel; 56 1.3 minoura bus_dmamap_t dx_dmamap; /* dmamap tag */ 57 1.3 minoura bus_dma_tag_t dx_tag; /* dma tag for the transfer */ 58 1.3 minoura int dx_ocr; /* direction */ 59 1.3 minoura int dx_scr; /* SCR value */ 60 1.3 minoura void *dx_device; /* (initial) device address */ 61 1.3 minoura bus_dma_segment_t dx_seg; /* b_d_s_t for the array chain */ 62 1.3 minoura struct dmac_sg_array *dx_array; /* DMAC array chain */ 63 1.3 minoura int dx_arraysize; /* size of above */ 64 1.3 minoura int dx_done; 65 1.3 minoura }; 66 1.3 minoura 67 1.3 minoura /* 68 1.2 minoura * Struct that holds the channel status. 69 1.2 minoura * Embedded in the device softc for each channel. 70 1.2 minoura */ 71 1.2 minoura struct dmac_channel_stat { 72 1.2 minoura int ch_channel; /* channel number */ 73 1.2 minoura char ch_name[8]; /* user device name */ 74 1.2 minoura bus_space_handle_t ch_bht; /* bus_space handle */ 75 1.2 minoura int ch_dcr; /* device description */ 76 1.2 minoura int ch_ocr; /* operation size, request mode */ 77 1.2 minoura int ch_normalv; /* normal interrupt vector */ 78 1.2 minoura int ch_errorv; /* error interrupt vector */ 79 1.2 minoura dmac_intr_handler_t ch_normal; /* normal interrupt handler */ 80 1.2 minoura dmac_intr_handler_t ch_error; /* error interrupt handler */ 81 1.2 minoura void *ch_normalarg; 82 1.2 minoura void *ch_errorarg; 83 1.3 minoura struct dmac_dma_xfer ch_xfer; 84 1.3 minoura struct dmac_sg_array *ch_map; /* transfer map for arraychain mode */ 85 1.3 minoura bus_dma_segment_t ch_seg[1]; 86 1.2 minoura struct device *ch_softc; /* device softc link */ 87 1.2 minoura }; 88 1.2 minoura 89 1.2 minoura /* 90 1.2 minoura * DMAC softc 91 1.2 minoura */ 92 1.2 minoura struct dmac_softc { 93 1.2 minoura struct device sc_dev; 94 1.2 minoura 95 1.2 minoura bus_space_tag_t sc_bst; 96 1.2 minoura bus_space_handle_t sc_bht; 97 1.2 minoura 98 1.2 minoura struct dmac_channel_stat sc_channels[DMAC_NCHAN]; 99 1.2 minoura }; 100 1.2 minoura 101 1.2 minoura 102 1.2 minoura #define DMAC_ADDR 0xe84000 103 1.2 minoura 104 1.2 minoura #define DMAC_MAXSEGSZ 0xff00 105 1.2 minoura #define DMAC_BOUNDARY 0 106 1.2 minoura 107 1.2 minoura struct dmac_channel_stat *dmac_alloc_channel __P((struct device*, int, char*, 108 1.2 minoura int, 109 1.2 minoura dmac_intr_handler_t, void*, 110 1.2 minoura int, 111 1.2 minoura dmac_intr_handler_t, void*)); 112 1.2 minoura /* ch, name, normalv, normal, errorv, error */ 113 1.2 minoura int dmac_free_channel __P((struct device*, int, void*)); 114 1.2 minoura /* ch, channel */ 115 1.2 minoura struct dmac_dma_xfer *dmac_prepare_xfer __P((struct dmac_channel_stat*, 116 1.2 minoura bus_dma_tag_t, 117 1.2 minoura bus_dmamap_t, 118 1.2 minoura int, int, void*)); 119 1.2 minoura /* chan, dmat, map, dir, sequence, dar */ 120 1.2 minoura #define dmac_finish_xfer(xfer) free(xfer, M_DEVBUF) 121 1.2 minoura int dmac_start_xfer __P((struct device*, struct dmac_dma_xfer*)); 122
Indexes created Wed Sep 24 15:09:51 GMT 2025