wdc_obio.c revision 1.2
1 /* $NetBSD: wdc_obio.c,v 1.2 1999/01/22 10:44:38 tsubai 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/param.h> 40 #include <sys/systm.h> 41 #include <sys/device.h> 42 #include <sys/malloc.h> 43 44 #include <vm/vm.h> 45 46 #include <machine/bus.h> 47 #include <machine/autoconf.h> 48 49 #include <dev/ata/atavar.h> 50 #include <dev/ic/wdcvar.h> 51 52 #include <macppc/dev/dbdma.h> 53 54 #define WDC_REG_NPORTS 8 55 #define WDC_AUXREG_OFFSET 0x16 56 #define WDC_DEFAULT_PIO_IRQ 13 /* XXX */ 57 #define WDC_DEFAULT_DMA_IRQ 2 /* XXX */ 58 59 #define WDC_OPTIONS_DMA 0x01 60 61 /* 62 * XXX This code currently doesn't even try to allow 32-bit data port use. 63 */ 64 65 struct wdc_obio_softc { 66 struct wdc_softc sc_wdcdev; 67 struct channel_softc *wdc_chanptr; 68 struct channel_softc wdc_channel; 69 dbdma_regmap_t *sc_dmareg; 70 dbdma_command_t *sc_dmacmd; 71 }; 72 73 int wdc_obio_probe __P((struct device *, struct cfdata *, void *)); 74 void wdc_obio_attach __P((struct device *, struct device *, void *)); 75 76 struct cfattach wdc_obio_ca = { 77 sizeof(struct wdc_obio_softc), wdc_obio_probe, wdc_obio_attach 78 }; 79 80 static int wdc_obio_dma_init __P((void *, int, int, void *, size_t, int)); 81 static void wdc_obio_dma_start __P((void *, int, int, int)); 82 static int wdc_obio_dma_finish __P((void *, int, int, int)); 83 84 int 85 wdc_obio_probe(parent, match, aux) 86 struct device *parent; 87 struct cfdata *match; 88 void *aux; 89 { 90 struct confargs *ca = aux; 91 92 if (strcmp(ca->ca_name, "ATA") == 0 || 93 strcmp(ca->ca_name, "ata") == 0 || 94 strcmp(ca->ca_name, "ata0") == 0 || 95 strcmp(ca->ca_name, "ide") == 0) 96 return 1; 97 98 return 0; 99 } 100 101 void 102 wdc_obio_attach(parent, self, aux) 103 struct device *parent, *self; 104 void *aux; 105 { 106 struct wdc_obio_softc *sc = (void *)self; 107 struct confargs *ca = aux; 108 struct channel_softc *chp = &sc->wdc_channel; 109 int piointr, dmaintr; 110 int use_dma = 0; 111 112 piointr = dmaintr = -1; 113 114 if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_DMA) { 115 if (ca->ca_nreg >= 16 || ca->ca_nintr == -1) 116 use_dma = 1; /* XXX Don't work yet. */ 117 } 118 119 if (ca->ca_nintr == -1) { 120 piointr = WDC_DEFAULT_PIO_IRQ; 121 dmaintr = WDC_DEFAULT_DMA_IRQ; 122 printf(" irq property not found; using %d,%d", 123 piointr, dmaintr); 124 } 125 126 if (ca->ca_nintr >= 4 && ca->ca_nreg >= 8) { 127 piointr = ca->ca_intr[0]; 128 printf(" irq %d", piointr); 129 } 130 if (ca->ca_nintr >= 8 && use_dma) { 131 dmaintr = ca->ca_intr[1]; 132 printf(",%d", dmaintr); 133 } 134 135 if (piointr == -1) { 136 printf(": couldn't get irq property\n"); 137 return; 138 } 139 140 if (use_dma) 141 printf(": DMA transfer"); 142 143 printf("\n"); 144 145 chp->cmd_iot = chp->ctl_iot = 146 macppc_make_bus_space_tag(ca->ca_baseaddr + ca->ca_reg[0], 4); 147 148 if (bus_space_map(chp->cmd_iot, 0, WDC_REG_NPORTS, 0, &chp->cmd_ioh) || 149 bus_space_subregion(chp->cmd_iot, chp->cmd_ioh, 150 WDC_AUXREG_OFFSET, 1, &chp->ctl_ioh)) { 151 printf("%s: couldn't map registers\n", 152 sc->sc_wdcdev.sc_dev.dv_xname); 153 return; 154 } 155 #if 0 156 chp->data32iot = chp->cmd_iot; 157 chp->data32ioh = chp->cmd_ioh; 158 #endif 159 160 intr_establish(piointr, IST_LEVEL, IPL_BIO, wdcintr, chp); 161 162 if (use_dma) { 163 if (dmaintr != -1) 164 intr_establish(dmaintr, IST_LEVEL, IPL_BIO, 165 wdcintr, chp); 166 167 sc->sc_dmacmd = dbdma_alloc(sizeof(dbdma_command_t) * 20); 168 sc->sc_dmareg = mapiodev(ca->ca_baseaddr + ca->ca_reg[2], 169 ca->ca_reg[3]); 170 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA; 171 } 172 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16; 173 sc->sc_wdcdev.PIO_cap = 0; 174 sc->wdc_chanptr = chp; 175 sc->sc_wdcdev.channels = &sc->wdc_chanptr; 176 sc->sc_wdcdev.nchannels = 1; 177 sc->sc_wdcdev.dma_arg = sc; 178 sc->sc_wdcdev.dma_init = wdc_obio_dma_init; 179 sc->sc_wdcdev.dma_start = wdc_obio_dma_start; 180 sc->sc_wdcdev.dma_finish = wdc_obio_dma_finish; 181 chp->channel = 0; 182 chp->wdc = &sc->sc_wdcdev; 183 chp->ch_queue = malloc(sizeof(struct channel_queue), 184 M_DEVBUF, M_NOWAIT); 185 if (chp->ch_queue == NULL) { 186 printf("%s: can't allocate memory for command queue", 187 sc->sc_wdcdev.sc_dev.dv_xname); 188 return; 189 } 190 191 wdcattach(chp); 192 } 193 194 static int 195 wdc_obio_dma_init(v, channel, drive, databuf, datalen, read) 196 void *v; 197 void *databuf; 198 size_t datalen; 199 int read; 200 { 201 struct wdc_obio_softc *sc = v; 202 vaddr_t va = (vaddr_t)databuf; 203 dbdma_command_t *cmdp; 204 u_int cmd; 205 206 #ifdef DIAGNOSTIC 207 if (va & PGOFSET) 208 panic("wdc_obio: databuf not page aligned"); 209 if (datalen > 65536) 210 panic("wdc_obio: datalen too large"); 211 #endif 212 213 cmdp = sc->sc_dmacmd; 214 cmd = read ? DBDMA_CMD_IN_MORE : DBDMA_CMD_OUT_MORE; 215 while (datalen > NBPG) { 216 DBDMA_BUILD(cmdp, cmd, 0, NBPG, vtophys(va), 217 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 218 datalen -= NBPG; 219 va += NBPG; 220 cmdp++; 221 } 222 223 /* the last page (datalen <= NBPG here) */ 224 cmd = read ? DBDMA_CMD_IN_LAST : DBDMA_CMD_OUT_LAST; 225 DBDMA_BUILD(cmdp, cmd, 0, datalen, vtophys(va), 226 DBDMA_INT_ALWAYS, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 227 cmdp++; 228 229 DBDMA_BUILD(cmdp, DBDMA_CMD_STOP, 0, 0, 0, 230 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 231 232 return 0; 233 } 234 235 static void 236 wdc_obio_dma_start(v, channel, drive, read) 237 void *v; 238 int channel, drive; 239 { 240 struct wdc_obio_softc *sc = v; 241 242 dbdma_start(sc->sc_dmareg, sc->sc_dmacmd); 243 } 244 245 static int 246 wdc_obio_dma_finish(v, channel, drive, read) 247 void *v; 248 int channel, drive; 249 int read; 250 { 251 /* nothing to do */ 252 return 0; 253 } 254
Indexes created Mon Sep 29 21:09:56 GMT 2025