wdc_isa.c revision 1.20
1 /* $NetBSD: wdc_isa.c,v 1.20 2001/03/11 05:10:58 takemura Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum and by Onno van der Linden. 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 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/device.h> 43 #include <sys/malloc.h> 44 45 #include <machine/bus.h> 46 #include <machine/intr.h> 47 48 #include <dev/isa/isavar.h> 49 #include <dev/isa/isadmavar.h> 50 51 #include <dev/ata/atavar.h> 52 #include <dev/ic/wdcvar.h> 53 54 #define WDC_ISA_REG_NPORTS 8 55 #define WDC_ISA_AUXREG_OFFSET 0x206 56 #define WDC_ISA_AUXREG_NPORTS 1 /* XXX "fdc" owns ports 0x3f7/0x377 */ 57 58 /* options passed via the 'flags' config keyword */ 59 #define WDC_OPTIONS_32 0x01 /* try to use 32bit data I/O */ 60 #define WDC_OPTIONS_SINGLE_DRIVE 0x02 /* Don't probe second drive */ 61 62 struct wdc_isa_softc { 63 struct wdc_softc sc_wdcdev; 64 struct channel_softc *wdc_chanptr; 65 struct channel_softc wdc_channel; 66 isa_chipset_tag_t sc_ic; 67 void *sc_ih; 68 int sc_drq; 69 }; 70 71 int wdc_isa_probe __P((struct device *, struct cfdata *, void *)); 72 void wdc_isa_attach __P((struct device *, struct device *, void *)); 73 74 struct cfattach wdc_isa_ca = { 75 sizeof(struct wdc_isa_softc), wdc_isa_probe, wdc_isa_attach 76 }; 77 78 static void wdc_isa_dma_setup __P((struct wdc_isa_softc *)); 79 static int wdc_isa_dma_init __P((void*, int, int, void *, size_t, int)); 80 static void wdc_isa_dma_start __P((void*, int, int)); 81 static int wdc_isa_dma_finish __P((void*, int, int, int)); 82 83 int 84 wdc_isa_probe(parent, match, aux) 85 struct device *parent; 86 struct cfdata *match; 87 void *aux; 88 { 89 struct channel_softc ch; 90 struct isa_attach_args *ia = aux; 91 int result = 0; 92 93 memset(&ch, 0, sizeof(ch)); 94 95 ch.cmd_iot = ia->ia_iot; 96 if (bus_space_map(ch.cmd_iot, ia->ia_iobase, WDC_ISA_REG_NPORTS, 0, 97 &ch.cmd_ioh)) 98 goto out; 99 100 ch.ctl_iot = ia->ia_iot; 101 if (bus_space_map(ch.ctl_iot, ia->ia_iobase + WDC_ISA_AUXREG_OFFSET, 102 WDC_ISA_AUXREG_NPORTS, 0, &ch.ctl_ioh)) 103 goto outunmap; 104 105 result = wdcprobe(&ch); 106 if (result) { 107 ia->ia_iosize = WDC_ISA_REG_NPORTS; 108 ia->ia_msize = 0; 109 } 110 111 bus_space_unmap(ch.ctl_iot, ch.ctl_ioh, WDC_ISA_AUXREG_NPORTS); 112 outunmap: 113 bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, WDC_ISA_REG_NPORTS); 114 out: 115 return (result); 116 } 117 118 void 119 wdc_isa_attach(parent, self, aux) 120 struct device *parent, *self; 121 void *aux; 122 { 123 struct wdc_isa_softc *sc = (void *)self; 124 struct isa_attach_args *ia = aux; 125 126 printf("\n"); 127 128 sc->wdc_channel.cmd_iot = ia->ia_iot; 129 sc->wdc_channel.ctl_iot = ia->ia_iot; 130 sc->sc_ic = ia->ia_ic; 131 if (bus_space_map(sc->wdc_channel.cmd_iot, ia->ia_iobase, 132 WDC_ISA_REG_NPORTS, 0, &sc->wdc_channel.cmd_ioh) || 133 bus_space_map(sc->wdc_channel.ctl_iot, 134 ia->ia_iobase + WDC_ISA_AUXREG_OFFSET, WDC_ISA_AUXREG_NPORTS, 135 0, &sc->wdc_channel.ctl_ioh)) { 136 printf("%s: couldn't map registers\n", 137 sc->sc_wdcdev.sc_dev.dv_xname); 138 } 139 sc->wdc_channel.data32iot = sc->wdc_channel.cmd_iot; 140 sc->wdc_channel.data32ioh = sc->wdc_channel.cmd_ioh; 141 142 sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE, 143 IPL_BIO, wdcintr, &sc->wdc_channel); 144 145 if (ia->ia_drq != DRQUNK) { 146 sc->sc_drq = ia->ia_drq; 147 148 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA; 149 sc->sc_wdcdev.dma_arg = sc; 150 sc->sc_wdcdev.dma_init = wdc_isa_dma_init; 151 sc->sc_wdcdev.dma_start = wdc_isa_dma_start; 152 sc->sc_wdcdev.dma_finish = wdc_isa_dma_finish; 153 wdc_isa_dma_setup(sc); 154 } 155 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_PREATA; 156 if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_32) 157 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA32; 158 if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_SINGLE_DRIVE) 159 sc->sc_wdcdev.cap |= WDC_CAPABILITY_SINGLE_DRIVE; 160 sc->sc_wdcdev.PIO_cap = 0; 161 sc->wdc_chanptr = &sc->wdc_channel; 162 sc->sc_wdcdev.channels = &sc->wdc_chanptr; 163 sc->sc_wdcdev.nchannels = 1; 164 sc->wdc_channel.channel = 0; 165 sc->wdc_channel.wdc = &sc->sc_wdcdev; 166 sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue), 167 M_DEVBUF, M_NOWAIT); 168 if (sc->wdc_channel.ch_queue == NULL) { 169 printf("%s: can't allocate memory for command queue", 170 sc->sc_wdcdev.sc_dev.dv_xname); 171 return; 172 } 173 wdcattach(&sc->wdc_channel); 174 } 175 176 static void 177 wdc_isa_dma_setup(sc) 178 struct wdc_isa_softc *sc; 179 { 180 bus_size_t maxsize; 181 182 if ((maxsize = isa_dmamaxsize(sc->sc_ic, sc->sc_drq)) < MAXPHYS) { 183 printf("%s: max DMA size %lu is less than required %d\n", 184 sc->sc_wdcdev.sc_dev.dv_xname, (u_long)maxsize, MAXPHYS); 185 sc->sc_wdcdev.cap &= ~WDC_CAPABILITY_DMA; 186 return; 187 } 188 189 if (isa_dmamap_create(sc->sc_ic, sc->sc_drq, 190 MAXPHYS, BUS_DMA_NOWAIT|BUS_DMA_ALLOCNOW)) { 191 printf("%s: can't create map for drq %d\n", 192 sc->sc_wdcdev.sc_dev.dv_xname, sc->sc_drq); 193 sc->sc_wdcdev.cap &= ~WDC_CAPABILITY_DMA; 194 } 195 } 196 197 static int 198 wdc_isa_dma_init(v, channel, drive, databuf, datalen, read) 199 void *v; 200 void *databuf; 201 size_t datalen; 202 int read; 203 { 204 struct wdc_isa_softc *sc = v; 205 206 isa_dmastart(sc->sc_ic, sc->sc_drq, databuf, datalen, NULL, 207 (read ? DMAMODE_READ : DMAMODE_WRITE) | DMAMODE_DEMAND, 208 BUS_DMA_NOWAIT); 209 return 0; 210 } 211 212 static void 213 wdc_isa_dma_start(v, channel, drive) 214 void *v; 215 int channel, drive; 216 { 217 /* nothing to do */ 218 } 219 220 static int 221 wdc_isa_dma_finish(v, channel, drive, read) 222 void *v; 223 int channel, drive; 224 int read; 225 { 226 struct wdc_isa_softc *sc = v; 227 228 isa_dmadone(sc->sc_ic, sc->sc_drq); 229 return 0; 230 } 231
Indexes created Tue Sep 30 20:09:53 GMT 2025