Annotation of sys/dev/sbus/xbox.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: xbox.c,v 1.3 2006/06/02 20:00:56 miod Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1999 Jason L. Wright (jason@thought.net)
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 18: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
! 19: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
! 20: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 21: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 22: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 23: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
! 24: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
! 25: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 26: * POSSIBILITY OF SUCH DAMAGE.
! 27: */
! 28:
! 29: /*
! 30: * Driver for the Sun SBus Expansion Subsystem
! 31: */
! 32:
! 33: #include <sys/param.h>
! 34: #include <sys/systm.h>
! 35: #include <sys/kernel.h>
! 36: #include <sys/errno.h>
! 37: #include <sys/ioctl.h>
! 38: #include <sys/syslog.h>
! 39: #include <sys/device.h>
! 40: #include <sys/malloc.h>
! 41:
! 42: #include <machine/autoconf.h>
! 43: #include <machine/bus.h>
! 44: #include <machine/cpu.h>
! 45: #include <dev/sbus/sbusvar.h>
! 46:
! 47: #include <dev/sbus/xboxreg.h>
! 48: #include <dev/sbus/xboxvar.h>
! 49:
! 50: int xboxmatch(struct device *, void *, void *);
! 51: void xboxattach(struct device *, struct device *, void *);
! 52: int xboxprint(void *, const char *);
! 53: int xbox_fix_range(struct xbox_softc *sc, struct sbus_softc *sbp);
! 54:
! 55: struct cfattach xbox_ca = {
! 56: sizeof (struct xbox_softc), xboxmatch, xboxattach
! 57: };
! 58:
! 59: struct cfdriver xbox_cd = {
! 60: NULL, "xbox", DV_DULL
! 61: };
! 62:
! 63: int
! 64: xboxmatch(struct device *parent, void *cf, void *aux)
! 65: {
! 66: struct sbus_attach_args *sa = aux;
! 67:
! 68: if (strcmp("SUNW,xbox", sa->sa_name))
! 69: return (0);
! 70:
! 71: return (1);
! 72: }
! 73:
! 74: void
! 75: xboxattach(struct device *parent, struct device *self, void *aux)
! 76: {
! 77: struct xbox_softc *sc = (struct xbox_softc *)self;
! 78: struct sbus_attach_args *sa = aux;
! 79: int node = sa->sa_node;
! 80: struct xbox_attach_args xa;
! 81: bus_space_handle_t write0;
! 82: char *s;
! 83:
! 84: s = getpropstring(node, "model");
! 85: printf(": model %s", s);
! 86:
! 87: s = getpropstring(node, "child-present");
! 88: if (strcmp(s, "false") == 0) {
! 89: printf(": no devices\n");
! 90: return;
! 91: }
! 92:
! 93: sc->sc_key = getpropint(node, "write0-key", -1);
! 94: sc->sc_node = node;
! 95:
! 96: /*
! 97: * Setup transparent access
! 98: */
! 99:
! 100: if (sbus_bus_map(sa->sa_bustag, sa->sa_reg[0].sbr_slot,
! 101: sa->sa_reg[0].sbr_offset, sa->sa_reg[0].sbr_size, 0, 0,
! 102: &write0) != 0) {
! 103: printf(": couldn't map write 0 register\n");
! 104: return;
! 105: }
! 106:
! 107: bus_space_write_4(sa->sa_bustag, write0, 0,
! 108: (sc->sc_key << 24) | XAC_CTL1_OFFSET |
! 109: XBOX_CTL1_CSIE | XBOX_CTL1_TRANSPARENT);
! 110: bus_space_write_4(sa->sa_bustag, write0, 0,
! 111: (sc->sc_key << 24) | XBC_CTL1_OFFSET |
! 112: XBOX_CTL1_XSIE | XBOX_CTL1_XSBRE | XBOX_CTL1_XSSE);
! 113: DELAY(100);
! 114:
! 115: bus_space_unmap(sa->sa_bustag, write0, sa->sa_reg[0].sbr_size);
! 116:
! 117: printf("\n");
! 118:
! 119: if (xbox_fix_range(sc, (struct sbus_softc *)parent) != 0)
! 120: return;
! 121:
! 122: bzero(&xa, sizeof xa);
! 123: xa.xa_name = "sbus";
! 124: xa.xa_node = node;
! 125: xa.xa_bustag = sa->sa_bustag;
! 126: xa.xa_dmatag = sa->sa_dmatag;
! 127:
! 128: (void)config_found(&sc->sc_dev, (void *)&xa, xboxprint);
! 129: }
! 130:
! 131: /*
! 132: * Fix up our address ranges based on parent address spaces.
! 133: */
! 134: int
! 135: xbox_fix_range(struct xbox_softc *sc, struct sbus_softc *sbp)
! 136: {
! 137: int error, i, j;
! 138:
! 139: error = getprop(sc->sc_node, "ranges", sizeof(struct sbus_range),
! 140: &sc->sc_nrange, (void **)&sc->sc_range);
! 141: if (error != 0) {
! 142: printf("%s: PROM ranges too large\n", sc->sc_dev.dv_xname);
! 143: return (error);
! 144: }
! 145:
! 146: for (i = 0; i < sc->sc_nrange; i++) {
! 147: for (j = 0; j < sbp->sc_nrange; j++) {
! 148: if (sc->sc_range[i].pspace == sbp->sc_range[j].cspace) {
! 149: sc->sc_range[i].poffset +=
! 150: sbp->sc_range[j].poffset;
! 151: sc->sc_range[i].pspace =
! 152: sbp->sc_range[j].pspace;
! 153: break;
! 154: }
! 155: }
! 156: }
! 157:
! 158: return (0);
! 159: }
! 160:
! 161: int
! 162: xboxprint(void *args, const char *bus)
! 163: {
! 164: struct xbox_attach_args *xa = args;
! 165:
! 166: if (bus != NULL)
! 167: printf("%s at %s", xa->xa_name, bus);
! 168: return (UNCONF);
! 169: }
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