1 /* $NetBSD: dmacvar.h,v 1.7 2005/12/11 12:19:37 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Minoura Makoto. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Hitachi HD63450 (= Motorola MC68450) DMAC driver for x68k. 41 */ 42 43 #include <dev/ic/mc68450reg.h> 44 #include <machine/bus.h> 45 46 #define DMAC_MAPSIZE 64 47 48 typedef int (*dmac_intr_handler_t)(void *); 49 50 /* 51 * Structure that describes a single transfer. 52 */ 53 struct dmac_channel_stat; 54 struct dmac_dma_xfer { 55 struct dmac_channel_stat *dx_channel; 56 bus_dmamap_t dx_dmamap; /* dmamap tag */ 57 bus_dma_tag_t dx_tag; /* dma tag for the transfer */ 58 int dx_ocr; /* direction */ 59 int dx_scr; /* SCR value */ 60 void *dx_device; /* (initial) device address */ 61 #ifdef DMAC_ARRAYCHAIN 62 struct dmac_sg_array *dx_array; /* DMAC array chain */ 63 int dx_done; 64 #endif 65 int dx_nextoff; /* for continued operation */ 66 int dx_nextsize; 67 }; 68 69 /* 70 * Struct that holds the channel status. 71 * Embedded in the device softc for each channel. 72 */ 73 struct dmac_channel_stat { 74 int ch_channel; /* channel number */ 75 char ch_name[8]; /* user device name */ 76 bus_space_handle_t ch_bht; /* bus_space handle */ 77 int ch_dcr; /* device description */ 78 int ch_ocr; /* operation size, request mode */ 79 int ch_normalv; /* normal interrupt vector */ 80 int ch_errorv; /* error interrupt vector */ 81 dmac_intr_handler_t ch_normal; /* normal interrupt handler */ 82 dmac_intr_handler_t ch_error; /* error interrupt handler */ 83 void *ch_normalarg; 84 void *ch_errorarg; 85 struct dmac_dma_xfer ch_xfer; 86 struct dmac_sg_array *ch_map; /* transfer map for arraychain mode */ 87 bus_dma_segment_t ch_seg[1]; 88 struct device *ch_softc; /* device softc link */ 89 }; 90 91 /* 92 * DMAC softc 93 */ 94 struct dmac_softc { 95 struct device sc_dev; 96 97 bus_space_tag_t sc_bst; 98 bus_space_handle_t sc_bht; 99 100 struct dmac_channel_stat sc_channels[DMAC_NCHAN]; 101 }; 102 103 104 #define DMAC_ADDR 0xe84000 105 106 #define DMAC_MAXSEGSZ 0xff00 107 #define DMAC_BOUNDARY 0 108 109 struct dmac_channel_stat *dmac_alloc_channel(struct device *, int, const char *, 110 int, dmac_intr_handler_t, void *, int, dmac_intr_handler_t, void *); 111 /* ch, name, normalv, normal, errorv, error */ 112 int dmac_free_channel(struct device *, int, void *); 113 /* ch, channel */ 114 struct dmac_dma_xfer *dmac_alloc_xfer(struct dmac_channel_stat *, 115 bus_dma_tag_t, bus_dmamap_t); 116 int dmac_load_xfer(struct device *, struct dmac_dma_xfer *); 117 118 int dmac_start_xfer(struct device *, struct dmac_dma_xfer *); 119 int dmac_start_xfer_offset(struct device *, struct dmac_dma_xfer *, 120 u_int, u_int); 121 int dmac_abort_xfer(struct device *, struct dmac_dma_xfer *); 122 /* Compatibility function: alloc, fill defaults, load */ 123 struct dmac_dma_xfer *dmac_prepare_xfer(struct dmac_channel_stat *, 124 bus_dma_tag_t, bus_dmamap_t, int, int, void *); 125 /* chan, dmat, map, dir, sequence, dar */ 126