wdc_obio.c revision 1.4
1 /* $NetBSD: wdc_obio.c,v 1.4 1999/06/14 08:53:06 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 char compat[32]; 92 93 /* XXX should not use name */ 94 if (strcmp(ca->ca_name, "ATA") == 0 || 95 strcmp(ca->ca_name, "ata") == 0 || 96 strcmp(ca->ca_name, "ata0") == 0 || 97 strcmp(ca->ca_name, "ide") == 0) 98 return 1; 99 100 bzero(compat, sizeof(compat)); 101 OF_getprop(ca->ca_node, "compatible", compat, sizeof(compat)); 102 if (strcmp(compat, "heathrow-ata") == 0) 103 return 1; 104 105 return 0; 106 } 107 108 void 109 wdc_obio_attach(parent, self, aux) 110 struct device *parent, *self; 111 void *aux; 112 { 113 struct wdc_obio_softc *sc = (void *)self; 114 struct confargs *ca = aux; 115 struct channel_softc *chp = &sc->wdc_channel; 116 int intr; 117 int use_dma = 0; 118 119 if (sc->sc_wdcdev.sc_dev.dv_cfdata->cf_flags & WDC_OPTIONS_DMA) { 120 if (ca->ca_nreg >= 16 || ca->ca_nintr == -1) 121 use_dma = 1; /* XXX Don't work yet. */ 122 } 123 124 if (ca->ca_nintr >= 4 && ca->ca_nreg >= 8) { 125 intr = ca->ca_intr[0]; 126 printf(" irq %d", intr); 127 } else if (ca->ca_nintr == -1) { 128 intr = WDC_DEFAULT_PIO_IRQ; 129 printf(" irq property not found; using %d", intr); 130 } else { 131 printf(": couldn't get irq property\n"); 132 return; 133 } 134 135 if (use_dma) 136 printf(": DMA transfer"); 137 138 printf("\n"); 139 140 chp->cmd_iot = chp->ctl_iot = 141 macppc_make_bus_space_tag(ca->ca_baseaddr + ca->ca_reg[0], 4); 142 143 if (bus_space_map(chp->cmd_iot, 0, WDC_REG_NPORTS, 0, &chp->cmd_ioh) || 144 bus_space_subregion(chp->cmd_iot, chp->cmd_ioh, 145 WDC_AUXREG_OFFSET, 1, &chp->ctl_ioh)) { 146 printf("%s: couldn't map registers\n", 147 sc->sc_wdcdev.sc_dev.dv_xname); 148 return; 149 } 150 #if 0 151 chp->data32iot = chp->cmd_iot; 152 chp->data32ioh = chp->cmd_ioh; 153 #endif 154 155 intr_establish(intr, IST_LEVEL, IPL_BIO, wdcintr, chp); 156 157 if (use_dma) { 158 sc->sc_dmacmd = dbdma_alloc(sizeof(dbdma_command_t) * 20); 159 sc->sc_dmareg = mapiodev(ca->ca_baseaddr + ca->ca_reg[2], 160 ca->ca_reg[3]); 161 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA; 162 } 163 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16; 164 sc->sc_wdcdev.PIO_cap = 0; 165 sc->wdc_chanptr = chp; 166 sc->sc_wdcdev.channels = &sc->wdc_chanptr; 167 sc->sc_wdcdev.nchannels = 1; 168 sc->sc_wdcdev.dma_arg = sc; 169 sc->sc_wdcdev.dma_init = wdc_obio_dma_init; 170 sc->sc_wdcdev.dma_start = wdc_obio_dma_start; 171 sc->sc_wdcdev.dma_finish = wdc_obio_dma_finish; 172 chp->channel = 0; 173 chp->wdc = &sc->sc_wdcdev; 174 chp->ch_queue = malloc(sizeof(struct channel_queue), 175 M_DEVBUF, M_NOWAIT); 176 if (chp->ch_queue == NULL) { 177 printf("%s: can't allocate memory for command queue", 178 sc->sc_wdcdev.sc_dev.dv_xname); 179 return; 180 } 181 182 wdcattach(chp); 183 } 184 185 static int 186 wdc_obio_dma_init(v, channel, drive, databuf, datalen, read) 187 void *v; 188 void *databuf; 189 size_t datalen; 190 int read; 191 { 192 struct wdc_obio_softc *sc = v; 193 vaddr_t va = (vaddr_t)databuf; 194 dbdma_command_t *cmdp; 195 u_int cmd, offset; 196 197 cmdp = sc->sc_dmacmd; 198 cmd = read ? DBDMA_CMD_IN_MORE : DBDMA_CMD_OUT_MORE; 199 200 offset = va & PGOFSET; 201 202 /* if va is not page-aligned, setup the first page */ 203 if (offset != 0) { 204 int rest = NBPG - offset; /* the rest of the page */ 205 206 if (datalen > rest) { /* if continues to next page */ 207 DBDMA_BUILD(cmdp, cmd, 0, rest, vtophys(va), 208 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, 209 DBDMA_BRANCH_NEVER); 210 datalen -= rest; 211 va += rest; 212 cmdp++; 213 } 214 } 215 216 /* now va is page-aligned */ 217 while (datalen > NBPG) { 218 DBDMA_BUILD(cmdp, cmd, 0, NBPG, vtophys(va), 219 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 220 datalen -= NBPG; 221 va += NBPG; 222 cmdp++; 223 } 224 225 /* the last page (datalen <= NBPG here) */ 226 cmd = read ? DBDMA_CMD_IN_LAST : DBDMA_CMD_OUT_LAST; 227 DBDMA_BUILD(cmdp, cmd, 0, datalen, vtophys(va), 228 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 229 cmdp++; 230 231 DBDMA_BUILD(cmdp, DBDMA_CMD_STOP, 0, 0, 0, 232 DBDMA_INT_NEVER, DBDMA_WAIT_NEVER, DBDMA_BRANCH_NEVER); 233 234 return 0; 235 } 236 237 static void 238 wdc_obio_dma_start(v, channel, drive, read) 239 void *v; 240 int channel, drive; 241 { 242 struct wdc_obio_softc *sc = v; 243 244 dbdma_start(sc->sc_dmareg, sc->sc_dmacmd); 245 } 246 247 static int 248 wdc_obio_dma_finish(v, channel, drive, read) 249 void *v; 250 int channel, drive; 251 int read; 252 { 253 struct wdc_obio_softc *sc = v; 254 255 dbdma_stop(sc->sc_dmareg); 256 return 0; 257 } 258
Indexes created Mon Sep 29 21:09:56 GMT 2025