Annotation of sys/arch/sparc/dev/sbus.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: sbus.c,v 1.16 2007/05/29 09:54:13 sobrado Exp $ */
! 2: /* $NetBSD: sbus.c,v 1.17 1997/06/01 22:10:39 pk Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1992, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This software was developed by the Computer Systems Engineering group
! 9: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
! 10: * contributed to Berkeley.
! 11: *
! 12: * All advertising materials mentioning features or use of this software
! 13: * must display the following acknowledgement:
! 14: * This product includes software developed by the University of
! 15: * California, Lawrence Berkeley Laboratory.
! 16: *
! 17: * Redistribution and use in source and binary forms, with or without
! 18: * modification, are permitted provided that the following conditions
! 19: * are met:
! 20: * 1. Redistributions of source code must retain the above copyright
! 21: * notice, this list of conditions and the following disclaimer.
! 22: * 2. Redistributions in binary form must reproduce the above copyright
! 23: * notice, this list of conditions and the following disclaimer in the
! 24: * documentation and/or other materials provided with the distribution.
! 25: * 3. Neither the name of the University nor the names of its contributors
! 26: * may be used to endorse or promote products derived from this software
! 27: * without specific prior written permission.
! 28: *
! 29: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 32: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 39: * SUCH DAMAGE.
! 40: *
! 41: * @(#)sbus.c 8.1 (Berkeley) 6/11/93
! 42: */
! 43:
! 44: /*
! 45: * SBus stuff.
! 46: */
! 47:
! 48: #include <sys/param.h>
! 49: #include <sys/malloc.h>
! 50: #include <sys/systm.h>
! 51: #include <sys/device.h>
! 52: #include <uvm/uvm_extern.h>
! 53:
! 54: #include <machine/autoconf.h>
! 55:
! 56: #include <sparc/dev/sbusreg.h>
! 57: #include <sparc/dev/sbusvar.h>
! 58: #include <sparc/dev/xboxreg.h>
! 59: #include <sparc/dev/xboxvar.h>
! 60: #include <sparc/dev/dmareg.h>
! 61:
! 62: int sbus_print(void *, const char *);
! 63:
! 64: /* autoconfiguration driver */
! 65: void sbus_attach(struct device *, struct device *, void *);
! 66: int sbus_match(struct device *, void *, void *);
! 67:
! 68: struct cfattach sbus_ca = {
! 69: sizeof(struct sbus_softc), sbus_match, sbus_attach
! 70: };
! 71:
! 72: struct cfdriver sbus_cd = {
! 73: NULL, "sbus", DV_DULL
! 74: };
! 75:
! 76: /*
! 77: * Print the location of some sbus-attached device (called just
! 78: * before attaching that device). If `sbus' is not NULL, the
! 79: * device was found but not configured; print the sbus as well.
! 80: * Return UNCONF (config_find ignores this if the device was configured).
! 81: */
! 82: int
! 83: sbus_print(args, sbus)
! 84: void *args;
! 85: const char *sbus;
! 86: {
! 87: struct confargs *ca = args;
! 88: char *class;
! 89: static char *sl = "slave-only";
! 90:
! 91: if (sbus != NULL) {
! 92: printf("\"%s\" at %s", ca->ca_ra.ra_name, sbus);
! 93: class = getpropstring(ca->ca_ra.ra_node, "device_type");
! 94: if (*class != '\0')
! 95: printf(" class %s", class);
! 96: }
! 97: /* Check root node for 'slave-only' property */
! 98: if (getpropint(0, sl, 0) & (1 << ca->ca_slot))
! 99: printf(" %s", sl);
! 100: printf(" slot %d offset 0x%x", ca->ca_slot, ca->ca_offset);
! 101: return (UNCONF);
! 102: }
! 103:
! 104: int
! 105: sbus_match(parent, vcf, aux)
! 106: struct device *parent;
! 107: void *vcf, *aux;
! 108: {
! 109: register struct cfdata *cf = vcf;
! 110: register struct confargs *ca = aux;
! 111: register struct romaux *ra = &ca->ca_ra;
! 112:
! 113: if (CPU_ISSUN4)
! 114: return (0);
! 115:
! 116: if (ca->ca_bustype == BUS_XBOX) {
! 117: struct xbox_softc *xsc = (struct xbox_softc *)parent;
! 118:
! 119: /* Prevent multiple attachments */
! 120: if (xsc->sc_attached == 0) {
! 121: xsc->sc_attached = 1;
! 122: return (1);
! 123: }
! 124:
! 125: return (0);
! 126: }
! 127:
! 128: return (strcmp(cf->cf_driver->cd_name, ra->ra_name) == 0);
! 129: }
! 130:
! 131: /*
! 132: * Attach an SBus.
! 133: */
! 134: void
! 135: sbus_attach(parent, self, aux)
! 136: struct device *parent;
! 137: struct device *self;
! 138: void *aux;
! 139: {
! 140: register struct sbus_softc *sc = (struct sbus_softc *)self;
! 141: struct confargs *ca = aux;
! 142: register struct romaux *ra = &ca->ca_ra;
! 143: register int node;
! 144: register char *name;
! 145: struct confargs oca;
! 146: int rlen;
! 147:
! 148: /*
! 149: * XXX there is only one SBus, for now -- do not know how to
! 150: * address children on others
! 151: */
! 152: if (sc->sc_dev.dv_unit > 0 && ca->ca_bustype != BUS_XBOX) {
! 153: printf(" unsupported\n");
! 154: return;
! 155: }
! 156:
! 157: /*
! 158: * Record clock frequency for synchronous SCSI.
! 159: * IS THIS THE CORRECT DEFAULT??
! 160: */
! 161: node = ra->ra_node;
! 162: sc->sc_clockfreq = getpropint(node, "clock-frequency", 25*1000*1000);
! 163: printf(": clock = %s MHz\n", clockfreq(sc->sc_clockfreq));
! 164:
! 165: /*
! 166: * Get the SBus burst transfer size if burst transfers are supported
! 167: */
! 168: sc->sc_burst = getpropint(node, "burst-sizes", 0);
! 169: sc->sc_burst = sc->sc_burst & ~SBUS_BURST_64;
! 170:
! 171: if (ca->ca_bustype == BUS_XBOX) {
! 172: struct xbox_softc *xsc = (struct xbox_softc *)parent;
! 173:
! 174: /* Parent has already done the leg work */
! 175: sc->sc_nrange = xsc->sc_nrange;
! 176: sc->sc_range = xsc->sc_range;
! 177: xsc->sc_attached = 2;
! 178: }
! 179: else {
! 180: if (ra->ra_bp != NULL && strcmp(ra->ra_bp->name, "sbus") == 0)
! 181: oca.ca_ra.ra_bp = ra->ra_bp + 1;
! 182: else
! 183: oca.ca_ra.ra_bp = NULL;
! 184:
! 185: rlen = getproplen(node, "ranges");
! 186: if (rlen > 0) {
! 187: sc->sc_nrange = rlen / sizeof(struct rom_range);
! 188: sc->sc_range =
! 189: (struct rom_range *)malloc(rlen, M_DEVBUF, M_NOWAIT);
! 190: if (sc->sc_range == 0)
! 191: panic("sbus: PROM ranges too large: %d", rlen);
! 192: (void)getprop(node, "ranges", sc->sc_range, rlen);
! 193: }
! 194: }
! 195:
! 196: /*
! 197: * Loop through ROM children, fixing any relative addresses
! 198: * and then configuring each device.
! 199: */
! 200: for (node = firstchild(node); node; node = nextsibling(node)) {
! 201: name = getpropstring(node, "name");
! 202: if (!romprop(&oca.ca_ra, name, node))
! 203: continue;
! 204:
! 205: sbus_translate(self, &oca);
! 206: oca.ca_bustype = BUS_SBUS;
! 207: (void) config_found(&sc->sc_dev, (void *)&oca, sbus_print);
! 208: }
! 209: }
! 210:
! 211: void
! 212: sbus_translate(dev, ca)
! 213: struct device *dev;
! 214: struct confargs *ca;
! 215: {
! 216: struct sbus_softc *sc = (struct sbus_softc *)dev;
! 217: register int base, slot;
! 218: register int i;
! 219:
! 220: if (sc->sc_nrange == 0) {
! 221: /* Old-style SBus configuration */
! 222: base = (int)ca->ca_ra.ra_paddr;
! 223: if (SBUS_ABS(base)) {
! 224: ca->ca_slot = SBUS_ABS_TO_SLOT(base);
! 225: ca->ca_offset = SBUS_ABS_TO_OFFSET(base);
! 226: } else {
! 227: if (!CPU_ISSUN4C)
! 228: panic("relative sbus addressing not supported");
! 229: ca->ca_slot = slot = ca->ca_ra.ra_iospace;
! 230: ca->ca_offset = base;
! 231: ca->ca_ra.ra_paddr = (void *)SBUS_ADDR(slot, base);
! 232: ca->ca_ra.ra_iospace = PMAP_OBIO;
! 233:
! 234: /* Fix any remaining register banks */
! 235: for (i = 1; i < ca->ca_ra.ra_nreg; i++) {
! 236: base = (int)ca->ca_ra.ra_reg[i].rr_paddr;
! 237: ca->ca_ra.ra_reg[i].rr_paddr =
! 238: (void *)SBUS_ADDR(slot, base);
! 239: ca->ca_ra.ra_reg[i].rr_iospace = PMAP_OBIO;
! 240: }
! 241: }
! 242:
! 243: } else {
! 244:
! 245: ca->ca_slot = ca->ca_ra.ra_iospace;
! 246: ca->ca_offset = (int)ca->ca_ra.ra_paddr;
! 247:
! 248: /* Translate into parent address spaces */
! 249: for (i = 0; i < ca->ca_ra.ra_nreg; i++) {
! 250: int j, cspace = ca->ca_ra.ra_reg[i].rr_iospace;
! 251:
! 252: for (j = 0; j < sc->sc_nrange; j++) {
! 253: if (sc->sc_range[j].cspace == cspace) {
! 254: (int)ca->ca_ra.ra_reg[i].rr_paddr +=
! 255: sc->sc_range[j].poffset;
! 256: (int)ca->ca_ra.ra_reg[i].rr_iospace =
! 257: sc->sc_range[j].pspace;
! 258: break;
! 259: }
! 260: }
! 261: }
! 262: }
! 263: }
! 264:
! 265: /*
! 266: * Returns true if this sbus slot is capable of dma
! 267: */
! 268: int
! 269: sbus_testdma(sc, ca)
! 270: struct sbus_softc *sc;
! 271: struct confargs *ca;
! 272: {
! 273: struct romaux *ra = &ca->ca_ra;
! 274:
! 275: /*
! 276: * XXX how to handle more than one sbus?
! 277: */
! 278:
! 279: if (getpropint(0, "slave-only", 0) & (1 << ca->ca_slot)) {
! 280: printf("%s: dma card found in non-dma sbus slot %d"
! 281: ": not supported\n", ra->ra_name, ca->ca_slot);
! 282: return (0);
! 283: }
! 284:
! 285: return (1);
! 286: }
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