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/* $OpenBSD: osiop_pcctwo.c,v 1.3 2004/07/30 19:02:06 miod Exp $ */
/*
* Copyright (c) 2004, Miodrag Vallat.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/dkstat.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/bugio.h>
#include <machine/prom.h>
#include <dev/ic/osiopreg.h>
#include <dev/ic/osiopvar.h>
#include <mvme88k/dev/pcctworeg.h>
#include <mvme88k/dev/pcctwovar.h>
void osiop_pcctwo_attach(struct device *, struct device *, void *);
int osiop_pcctwo_intr(void *);
int osiop_pcctwo_match(struct device *, void *, void *);
struct osiop_pcctwo_softc {
struct osiop_softc sc_osiop;
struct intrhand sc_ih;
};
struct cfattach osiop_pcctwo_ca = {
sizeof(struct osiop_pcctwo_softc),
osiop_pcctwo_match, osiop_pcctwo_attach
};
int
osiop_pcctwo_match(struct device *parent, void *cf, void *aux)
{
struct confargs *ca = aux;
bus_space_handle_t ioh;
int rc;
if (bus_space_map(ca->ca_iot, ca->ca_paddr, OSIOP_NREGS, 0, &ioh) != 0)
return 0;
rc = badvaddr((vaddr_t)bus_space_vaddr(ca->ca_iot, ioh), 4);
bus_space_unmap(ca->ca_iot, ca->ca_paddr, OSIOP_NREGS);
if (rc == 0) {
bus_space_unmap(ca->ca_iot, ca->ca_paddr, OSIOP_NREGS);
return 1;
}
/*
* For some reason, if the SCSI hardware is not ``warmed'' by the
* BUG (netboot or boot from external SCSI controller), badvaddr()
* will always fail, although the hardware is there.
* Since the BUG will do the right thing, we'll defer a dummy read
* from the controller and retry.
*/
if (brdtyp == BRD_187 || brdtyp == BRD_8120 || brdtyp == BRD_197) {
struct mvmeprom_dskio dio;
char buf[MVMEPROM_BLOCK_SIZE];
#ifdef DEBUG
printf("osiop_pcctwo_match: trying to warm up controller\n");
#endif
bzero(&dio, sizeof dio);
dio.pbuffer = buf;
dio.blk_cnt = 1;
bugdiskrd(&dio);
rc = badvaddr((vaddr_t)bus_space_vaddr(ca->ca_iot, ioh), 4);
}
bus_space_unmap(ca->ca_iot, ca->ca_paddr, OSIOP_NREGS);
return rc == 0;
}
void
osiop_pcctwo_attach(struct device *parent, struct device *self, void *aux)
{
struct pcctwosoftc *pcctwo = (struct pcctwosoftc *)parent;
struct osiop_softc *sc = (struct osiop_softc *)self;
struct osiop_pcctwo_softc *psc = (struct osiop_pcctwo_softc *)self;
struct confargs *ca = aux;
int tmp;
extern int cpuspeed;
sc->sc_bst = ca->ca_iot;
sc->sc_dmat = ca->ca_dmat;
if (bus_space_map(sc->sc_bst, ca->ca_paddr, OSIOP_NREGS, 0,
&sc->sc_reg) != 0) {
printf(": couldn't map I/O ports\n");
return;
}
switch (brdtyp) {
#ifdef MVME197
case BRD_197:
sc->sc_clock_freq = cpuspeed;
break;
#endif
#ifdef MVME187
case BRD_187:
case BRD_8120:
sc->sc_clock_freq = cpuspeed * 2;
break;
#endif
default:
sc->sc_clock_freq = 50; /* wild guess */
break;
}
sc->sc_dcntl = OSIOP_DCNTL_EA;
sc->sc_ctest7 = OSIOP_CTEST7_TT1; /* no snooping */
sc->sc_dmode = OSIOP_DMODE_BL4; /* burst length = 4 */
sc->sc_flags = 0;
sc->sc_id = 7; /* XXX should read from CNFG block in nvram */
tmp = bootpart;
if (ca->ca_paddr != bootaddr)
bootpart = -1; /* never match */
osiop_attach(sc);
bootpart = tmp;
psc->sc_ih.ih_fn = osiop_pcctwo_intr;
psc->sc_ih.ih_arg = sc;
psc->sc_ih.ih_wantframe = 0;
psc->sc_ih.ih_ipl = ca->ca_ipl;
/* enable device interrupts */
pcctwointr_establish(PCC2V_SCSI, &psc->sc_ih, self->dv_xname);
bus_space_write_1(pcctwo->sc_iot, pcctwo->sc_ioh,
PCCTWO_SCSIICR, PCC2_IRQ_IEN | (ca->ca_ipl & PCC2_IRQ_IPL));
}
int
osiop_pcctwo_intr(void *arg)
{
struct osiop_softc *sc = arg;
u_int8_t istat;
if (sc->sc_flags & OSIOP_INTSOFF)
return 0;
istat = osiop_read_1(sc, OSIOP_ISTAT);
if ((istat & (OSIOP_ISTAT_SIP | OSIOP_ISTAT_DIP)) == 0)
return 0;
/*
* 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;
sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
DELAY(25);
sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);
osiop_intr(sc);
return 1;
}
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