Annotation of sys/arch/mvme88k/dev/osiop_pcctwo.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: osiop_pcctwo.c,v 1.5 2006/05/08 14:36:10 miod Exp $ */
! 2: /*
! 3: * Copyright (c) 2004, Miodrag Vallat.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: *
! 14: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 15: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
! 16: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
! 17: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
! 18: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 19: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 20: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 21: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
! 22: * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
! 23: * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 24: * POSSIBILITY OF SUCH DAMAGE.
! 25: */
! 26:
! 27: #include <sys/param.h>
! 28: #include <sys/systm.h>
! 29: #include <sys/device.h>
! 30: #include <sys/disklabel.h>
! 31: #include <sys/dkstat.h>
! 32:
! 33: #include <scsi/scsi_all.h>
! 34: #include <scsi/scsiconf.h>
! 35:
! 36: #include <machine/bus.h>
! 37: #include <machine/autoconf.h>
! 38: #include <machine/cpu.h>
! 39:
! 40: #include <machine/bugio.h>
! 41: #include <machine/prom.h>
! 42:
! 43: #include <dev/ic/osiopreg.h>
! 44: #include <dev/ic/osiopvar.h>
! 45:
! 46: #include <mvme88k/dev/pcctworeg.h>
! 47: #include <mvme88k/dev/pcctwovar.h>
! 48:
! 49: void osiop_pcctwo_attach(struct device *, struct device *, void *);
! 50: int osiop_pcctwo_intr(void *);
! 51: int osiop_pcctwo_match(struct device *, void *, void *);
! 52:
! 53: struct osiop_pcctwo_softc {
! 54: struct osiop_softc sc_osiop;
! 55: struct intrhand sc_ih;
! 56: };
! 57:
! 58: struct cfattach osiop_pcctwo_ca = {
! 59: sizeof(struct osiop_pcctwo_softc),
! 60: osiop_pcctwo_match, osiop_pcctwo_attach
! 61: };
! 62:
! 63: int
! 64: osiop_pcctwo_match(struct device *parent, void *cf, void *aux)
! 65: {
! 66: struct confargs *ca = aux;
! 67: bus_space_handle_t ioh;
! 68: int rc;
! 69:
! 70: if (bus_space_map(ca->ca_iot, ca->ca_paddr, OSIOP_NREGS, 0, &ioh) != 0)
! 71: return (0);
! 72: rc = badaddr((vaddr_t)bus_space_vaddr(ca->ca_iot, ioh), 4);
! 73: if (rc == 0) {
! 74: bus_space_unmap(ca->ca_iot, ioh, OSIOP_NREGS);
! 75: return (1);
! 76: }
! 77:
! 78: /*
! 79: * For some reason, if the SCSI hardware is not ``warmed'' by the
! 80: * BUG (netboot or boot from external SCSI controller), badaddr()
! 81: * will always fail, although the hardware is there.
! 82: * Since the BUG will do the right thing, we'll defer a dummy read
! 83: * from the controller and retry.
! 84: */
! 85: if (brdtyp == BRD_187 || brdtyp == BRD_8120 || brdtyp == BRD_197) {
! 86: struct mvmeprom_dskio dio;
! 87: char buf[MVMEPROM_BLOCK_SIZE];
! 88:
! 89: #ifdef DEBUG
! 90: printf("osiop_pcctwo_match: trying to warm up controller\n");
! 91: #endif
! 92: bzero(&dio, sizeof dio);
! 93: dio.pbuffer = buf;
! 94: dio.blk_cnt = 1;
! 95: bugdiskrd(&dio);
! 96:
! 97: rc = badaddr((vaddr_t)bus_space_vaddr(ca->ca_iot, ioh), 4);
! 98: }
! 99:
! 100: bus_space_unmap(ca->ca_iot, ioh, OSIOP_NREGS);
! 101: return (rc == 0);
! 102: }
! 103:
! 104: void
! 105: osiop_pcctwo_attach(struct device *parent, struct device *self, void *aux)
! 106: {
! 107: struct pcctwosoftc *pcctwo = (struct pcctwosoftc *)parent;
! 108: struct osiop_softc *sc = (struct osiop_softc *)self;
! 109: struct osiop_pcctwo_softc *psc = (struct osiop_pcctwo_softc *)self;
! 110: struct confargs *ca = aux;
! 111: int tmp;
! 112: extern int cpuspeed;
! 113:
! 114: sc->sc_bst = ca->ca_iot;
! 115: sc->sc_dmat = ca->ca_dmat;
! 116:
! 117: if (bus_space_map(sc->sc_bst, ca->ca_paddr, OSIOP_NREGS, 0,
! 118: &sc->sc_reg) != 0) {
! 119: printf(": couldn't map I/O ports\n");
! 120: return;
! 121: }
! 122:
! 123: switch (brdtyp) {
! 124: #ifdef MVME197
! 125: case BRD_197:
! 126: sc->sc_clock_freq = cpuspeed;
! 127: break;
! 128: #endif
! 129: #ifdef MVME187
! 130: case BRD_187:
! 131: case BRD_8120:
! 132: sc->sc_clock_freq = cpuspeed * 2;
! 133: break;
! 134: #endif
! 135: default:
! 136: sc->sc_clock_freq = 50; /* wild guess */
! 137: break;
! 138: }
! 139:
! 140: sc->sc_dcntl = OSIOP_DCNTL_EA;
! 141: sc->sc_ctest7 = OSIOP_CTEST7_TT1; /* no snooping */
! 142: sc->sc_dmode = OSIOP_DMODE_BL4; /* burst length = 4 */
! 143: sc->sc_flags = 0;
! 144: sc->sc_id = 7; /* XXX should read from CNFG block in nvram */
! 145:
! 146: tmp = bootpart;
! 147: if (ca->ca_paddr != bootaddr)
! 148: bootpart = -1; /* never match */
! 149:
! 150: osiop_attach(sc);
! 151:
! 152: bootpart = tmp;
! 153:
! 154: psc->sc_ih.ih_fn = osiop_pcctwo_intr;
! 155: psc->sc_ih.ih_arg = sc;
! 156: psc->sc_ih.ih_wantframe = 0;
! 157: psc->sc_ih.ih_ipl = ca->ca_ipl;
! 158:
! 159: /* enable device interrupts */
! 160: pcctwointr_establish(PCC2V_SCSI, &psc->sc_ih, self->dv_xname);
! 161: bus_space_write_1(pcctwo->sc_iot, pcctwo->sc_ioh,
! 162: PCCTWO_SCSIICR, PCC2_IRQ_IEN | (ca->ca_ipl & PCC2_IRQ_IPL));
! 163: }
! 164:
! 165: int
! 166: osiop_pcctwo_intr(void *arg)
! 167: {
! 168: struct osiop_softc *sc = arg;
! 169: u_int8_t istat;
! 170:
! 171: if (sc->sc_flags & OSIOP_INTSOFF)
! 172: return 0;
! 173:
! 174: istat = osiop_read_1(sc, OSIOP_ISTAT);
! 175: if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
! 176: return 0;
! 177:
! 178: /*
! 179: * 53c710 manual recommends reading dstat and sstat0 at least
! 180: * 12 clk cycles apart if reading as bytes (which is what
! 181: * pcc2 permits). Stick in a 1us delay between accessing dstat and
! 182: * sstat0 below.
! 183: *
! 184: * save interrupt status, DMA status, and SCSI status 0
! 185: * (may need to deal with stacked interrupts?)
! 186: */
! 187: sc->sc_istat = istat;
! 188: sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
! 189: DELAY(25);
! 190: sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);
! 191:
! 192: osiop_intr(sc);
! 193:
! 194: return 1;
! 195: }
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