Annotation of sys/arch/mvme68k/dev/sshdma.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: sshdma.c,v 1.14 2006/11/28 23:59:45 dlg Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1995 Theo de Raadt
! 5: * Copyright (c) 1994 Michael L. Hitch
! 6: * Copyright (c) 1982, 1990 The Regents of the University of California.
! 7: * All rights reserved.
! 8: *
! 9: * Redistribution and use in source and binary forms, with or without
! 10: * modification, are permitted provided that the following conditions
! 11: * are met:
! 12: * 1. Redistributions of source code must retain the above copyright
! 13: * notice, this list of conditions and the following disclaimer.
! 14: * 2. Redistributions in binary form must reproduce the above copyright
! 15: * notice, this list of conditions and the following disclaimer in the
! 16: * documentation and/or other materials provided with the distribution.
! 17: * 3. Neither the name of the University nor the names of its contributors
! 18: * may be used to endorse or promote products derived from this software
! 19: * without specific prior written permission.
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 31: * SUCH DAMAGE.
! 32: *
! 33: * @(#)dma.c
! 34: */
! 35:
! 36: #include <sys/param.h>
! 37: #include <sys/systm.h>
! 38: #include <sys/kernel.h>
! 39: #include <sys/device.h>
! 40:
! 41: #include <scsi/scsi_all.h>
! 42: #include <scsi/scsiconf.h>
! 43:
! 44: #include <machine/autoconf.h>
! 45: #include <mvme68k/dev/sshreg.h>
! 46: #include <mvme68k/dev/sshvar.h>
! 47:
! 48: #include "mc.h"
! 49: #include "pcctwo.h"
! 50:
! 51: #if NMC > 0
! 52: #include <mvme68k/dev/mcreg.h>
! 53: #endif
! 54: #if NPCCTWO > 0
! 55: #include <mvme68k/dev/pcctworeg.h>
! 56: #endif
! 57:
! 58: int afscmatch(struct device *, void *, void *);
! 59: void afscattach(struct device *, struct device *, void *);
! 60:
! 61: void sshintr(struct ssh_softc *);
! 62: int afsc_dmaintr(void *);
! 63:
! 64: extern void sshinitialize(struct ssh_softc *);
! 65:
! 66: struct scsi_adapter afsc_scsiswitch = {
! 67: ssh_scsicmd,
! 68: ssh_minphys,
! 69: 0, /* no lun support */
! 70: 0, /* no lun support */
! 71: };
! 72:
! 73: struct scsi_device afsc_scsidev = {
! 74: NULL, /* use default error handler */
! 75: NULL, /* do not have a start function */
! 76: NULL, /* have no async handler */
! 77: NULL, /* Use default done routine */
! 78: };
! 79:
! 80: struct cfattach ssh_ca = {
! 81: sizeof(struct ssh_softc), afscmatch, afscattach,
! 82: };
! 83:
! 84: struct cfdriver ssh_cd = {
! 85: NULL, "ssh", DV_DULL
! 86: };
! 87:
! 88: int
! 89: afscmatch(pdp, vcf, args)
! 90: struct device *pdp;
! 91: void *vcf, *args;
! 92: {
! 93: struct confargs *ca = args;
! 94:
! 95: return (!badvaddr((vaddr_t)ca->ca_vaddr, 4));
! 96: }
! 97:
! 98: void
! 99: afscattach(parent, self, auxp)
! 100: struct device *parent, *self;
! 101: void *auxp;
! 102: {
! 103: struct ssh_softc *sc = (struct ssh_softc *)self;
! 104: struct confargs *ca = auxp;
! 105: struct scsibus_attach_args saa;
! 106: ssh_regmap_p rp;
! 107: int tmp;
! 108: extern int cpuspeed;
! 109:
! 110: sc->sc_sshp = rp = (void *)ca->ca_vaddr;
! 111: /*
! 112: * ssh uses sc_clock_freq to define the dcntl & ctest7 reg values
! 113: * (was 0x0221, but i added SSH_CTEST7_SC0 for snooping control)
! 114: * XXX does the clock frequency change for the 33MHz processors?
! 115: */
! 116: sc->sc_clock_freq = cpuspeed * 2;
! 117: #ifdef MVME177
! 118: /* MVME177 ssh clock documented as fixed 50MHz in VME177A/HX */
! 119: if (cputyp == CPU_177)
! 120: sc->sc_clock_freq = 50;
! 121: #endif
! 122: #ifdef MVME172
! 123: /* XXX this is a guess! Same as MVME177?*/
! 124: if (cputyp == CPU_172)
! 125: sc->sc_clock_freq = 50;
! 126: #endif
! 127: sc->sc_dcntl = SSH_DCNTL_EA;
! 128: /*XXX*/ if (sc->sc_clock_freq <= 25)
! 129: /*XXX*/ sc->sc_dcntl |= (2 << 6);
! 130: /*XXX*/ else if (sc->sc_clock_freq <= 37)
! 131: /*XXX*/ sc->sc_dcntl |= (1 << 6);
! 132: /*XXX*/ else if (sc->sc_clock_freq <= 50)
! 133: /*XXX*/ sc->sc_dcntl |= (0 << 6);
! 134: /*XXX*/ else
! 135: /*XXX*/ sc->sc_dcntl |= (3 << 6);
! 136:
! 137: #if defined(MVME172) || defined(MVME177)
! 138: /* No Select timouts on MC68060 */
! 139: /* XXX 177 works better with them! */
! 140: if (cputyp == CPU_172 /* || cputyp == CPU_177 */)
! 141: sc->sc_ctest7 = SSH_CTEST7_SNOOP | SSH_CTEST7_TT1 | SSH_CTEST7_STD;
! 142: else
! 143: #endif
! 144: sc->sc_ctest7 = SSH_CTEST7_SNOOP | SSH_CTEST7_TT1;
! 145:
! 146: sc->sc_link.adapter_softc = sc;
! 147: sc->sc_link.adapter_target = 7; /* XXXX should ask ROM */
! 148: sc->sc_link.adapter = &afsc_scsiswitch;
! 149: sc->sc_link.device = &afsc_scsidev;
! 150: sc->sc_link.openings = 1;
! 151:
! 152: sc->sc_ih.ih_fn = afsc_dmaintr;
! 153: sc->sc_ih.ih_arg = sc;
! 154: sc->sc_ih.ih_ipl = ca->ca_ipl;
! 155:
! 156: sshinitialize(sc);
! 157:
! 158: switch (ca->ca_bustype) {
! 159: #if NMC > 0
! 160: case BUS_MC:
! 161: mcintr_establish(MCV_NCR, &sc->sc_ih, self->dv_xname);
! 162: sys_mc->mc_ncrirq = ca->ca_ipl | MC_IRQ_IEN;
! 163: break;
! 164: #endif
! 165: #if NPCCTWO > 0
! 166: case BUS_PCCTWO:
! 167: pcctwointr_establish(PCC2V_NCR, &sc->sc_ih, self->dv_xname);
! 168: sys_pcc2->pcc2_ncrirq = ca->ca_ipl | PCC2_IRQ_IEN;
! 169: break;
! 170: #endif
! 171: }
! 172:
! 173: /*
! 174: * attach all scsi units on us, watching for boot device
! 175: * (see device_register).
! 176: */
! 177: tmp = bootpart;
! 178: if (ca->ca_paddr != bootaddr)
! 179: bootpart = -1; /* invalid flag to device_register */
! 180:
! 181: bzero(&saa, sizeof(saa));
! 182: saa.saa_sc_link = &sc->sc_link;
! 183:
! 184: config_found(self, &saa, scsiprint);
! 185: bootpart = tmp; /* restore old value */
! 186:
! 187: }
! 188:
! 189: int
! 190: afsc_dmaintr(arg)
! 191: void *arg;
! 192: {
! 193: struct ssh_softc *sc = (struct ssh_softc *)arg;
! 194: ssh_regmap_p rp;
! 195: u_char istat;
! 196:
! 197: rp = sc->sc_sshp;
! 198: istat = rp->ssh_istat;
! 199: if ((istat & (SSH_ISTAT_SIP | SSH_ISTAT_DIP)) == 0)
! 200: return (0);
! 201: if ((rp->ssh_sien | rp->ssh_dien) == 0)
! 202: return (0); /* no interrupts enabled */
! 203:
! 204: /*
! 205: * save interrupt status, DMA status, and SCSI status 0
! 206: * (may need to deal with stacked interrupts?)
! 207: */
! 208: sc->sc_istat = istat;
! 209: sc->sc_dstat = rp->ssh_dstat;
! 210: sc->sc_sstat0 = rp->ssh_sstat0;
! 211: sshintr(sc);
! 212: return (1);
! 213: }
! 214:
! 215: #ifdef DEBUG
! 216: void
! 217: afsc_dump()
! 218: {
! 219: int i;
! 220:
! 221: for (i = 0; i < afsccd.cd_ndevs; ++i)
! 222: if (afsccd.cd_devs[i])
! 223: ssh_dump(afsccd.cd_devs[i]);
! 224: }
! 225: #endif
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