/* $OpenBSD: sshdma.c,v 1.12 2003/06/02 23:27:52 millert Exp $ */ /* * Copyright (c) 1996 Nivas Madhur * Copyright (c) 1995 Theo de Raadt * Copyright (c) 1994 Michael L. Hitch * Copyright (c) 1982, 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)dma.c */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pcctwo.h" #if NPCCTWO > 0 #include #include #endif int afscmatch(struct device *, void *, void *); void afscattach(struct device *, struct device *, void *); int afscprint(void *auxp, char *); int sshintr(struct ssh_softc *); int afsc_dmaintr(void *); void sshinitialize(struct ssh_softc *); struct scsi_adapter afsc_scsiswitch = { ssh_scsicmd, ssh_minphys, 0, /* no lun support */ 0, /* no lun support */ }; struct scsi_device afsc_scsidev = { NULL, /* use default error handler */ NULL, /* do not have a start function */ NULL, /* have no async handler */ NULL, /* Use default done routine */ }; struct cfattach ssh_ca = { sizeof(struct ssh_softc), afscmatch, afscattach, }; struct cfdriver ssh_cd = { NULL, "ssh", DV_DULL, 0 }; int afscmatch(pdp, vcf, args) struct device *pdp; void *vcf, *args; { struct confargs *ca = args; if (badvaddr((vm_offset_t)IIOV(ca->ca_vaddr), 4)) { return(0); } return (1); } void afscattach(parent, self, auxp) struct device *parent, *self; void *auxp; { struct ssh_softc *sc = (struct ssh_softc *)self; struct confargs *ca = auxp; ssh_regmap_p rp; int tmp; extern int cpuspeed; sc->sc_sshp = rp = ca->ca_vaddr; /* * ssh uses sc_clock_freq to define the dcntl & ctest7 reg values * (was 0x0221, but i added SSH_CTEST7_SC0 for snooping control) * XXX does the clock frequency change for the 33MHz processors? */ sc->sc_clock_freq = cpuspeed * 2; sc->sc_dcntl = SSH_DCNTL_EA; /*X*/ if (sc->sc_clock_freq <= 25) /*X*/ sc->sc_dcntl |= (2 << 6); /*X*/ else if (sc->sc_clock_freq <= 37) /*X*/ sc->sc_dcntl |= (1 << 6); /*X*/ else if (sc->sc_clock_freq <= 50) /*X*/ sc->sc_dcntl |= (0 << 6); /*X*/ else /*X*/ sc->sc_dcntl |= (3 << 6); sc->sc_ctest0 = SSH_CTEST0_BTD | SSH_CTEST0_EAN; /* * MVME187 doesn't implement snooping... */ sc->sc_ctest7 = SSH_CTEST7_TT1; sc->sc_link.adapter_softc = sc; sc->sc_link.adapter_target = 7; /* XXXX should ask ROM */ sc->sc_link.adapter = &afsc_scsiswitch; sc->sc_link.device = &afsc_scsidev; sc->sc_link.openings = 1; sc->sc_ih.ih_fn = afsc_dmaintr; sc->sc_ih.ih_arg = sc; sc->sc_ih.ih_wantframe = 0; sc->sc_ih.ih_ipl = ca->ca_ipl; sshinitialize(sc); switch (ca->ca_bustype) { #if NPCCTWO > 0 case BUS_PCCTWO: { /* * Disable caching for the softc. Actually, I want * to disable cache for acb structures, but they are * part of softc, and I am disabling the entire softc * just in case. */ struct pcctworeg *pcc2 = (struct pcctworeg *)ca->ca_master; pmap_cache_ctrl(pmap_kernel(), trunc_page((vm_offset_t)sc), round_page((vm_offset_t)sc + sizeof(*sc)), CACHE_INH); pcctwointr_establish(PCC2V_NCR, &sc->sc_ih); /* enable interrupts at ca_ipl */ pcc2->pcc2_ncrirq = ca->ca_ipl | PCC2_IRQ_IEN; break; } #endif } evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt); /* * attach all scsi units on us, watching for boot device * (see dk_establish). */ tmp = bootpart; if (ca->ca_paddr != bootaddr) bootpart = -1; /* invalid flag to dk_establish */ config_found(self, &sc->sc_link, scsiprint); bootpart = tmp; /* restore old value */ } /* * print diag if pnp is NULL else just extra */ int afscprint(auxp, pnp) void *auxp; char *pnp; { if (pnp == NULL) return (UNCONF); return (QUIET); } int afsc_dmaintr(arg) void *arg; { struct ssh_softc *sc = arg; ssh_regmap_p rp; u_char istat; rp = sc->sc_sshp; istat = rp->ssh_istat; if ((istat & (SSH_ISTAT_SIP | SSH_ISTAT_DIP)) == 0) return (0); if ((rp->ssh_sien | rp->ssh_dien) == 0) return (0); /* no interrupts enabled */ /* * 53c710 manual recommends reading dstat and sstat0 at least * 12 clk cycles apart if reading as bytes (which is what * pcc2 permits). Stick in a 1us delay between accessing dstat and * sstat0 below. * * save interrupt status, DMA status, and SCSI status 0 * (may need to deal with stacked interrupts?) */ sc->sc_istat = istat; if (istat & SSH_ISTAT_SIP) { sc->sc_sstat0 = rp->ssh_sstat0; } if (istat & SSH_ISTAT_DIP) { delay(3); sc->sc_dstat = rp->ssh_dstat; } sshintr(sc); sc->sc_intrcnt.ev_count++; return (1); } #ifdef XXX_CD_DEBUG /* XXXsmurph What is afsccd ?? */ void afsc_dump() { int i; for (i = 0; i < afsccd.cd_ndevs; ++i) if (afsccd.cd_devs[i]) ssh_dump(afsccd.cd_devs[i]); } #endif