NetBSD/sys/arch/arc/jazz/osiop_jazzio.c

149 lines
3.9 KiB
C

/* $NetBSD: osiop_jazzio.c,v 1.1 2001/04/30 04:52:54 tsutsui Exp $ */
/*
* Copyright (c) 2001 Izumi Tsutsui. 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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/buf.h>
#include <sys/malloc.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <machine/cpu.h>
#include <machine/autoconf.h>
#include <machine/bus.h>
#include <dev/ic/osiopreg.h>
#include <dev/ic/osiopvar.h>
#include <arc/jazz/jazziovar.h>
int osiop_jazzio_match(struct device *, struct cfdata *, void *);
void osiop_jazzio_attach(struct device *, struct device *, void *);
int osiop_jazzio_intr(void *);
struct cfattach osiop_jazzio_ca = {
sizeof(struct osiop_softc), osiop_jazzio_match, osiop_jazzio_attach
};
int
osiop_jazzio_match(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct jazzio_attach_args *ja = aux;
if (strcmp(ja->ja_name, "osiop") != 0)
return (0);
return (1);
}
void
osiop_jazzio_attach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct jazzio_attach_args *ja = aux;
struct osiop_softc *sc = (void *)self;
int err, scid;
sc->sc_bst = ja->ja_bust;
sc->sc_dmat = ja->ja_dmat;
/*
* Map registers
*/
err = bus_space_map(sc->sc_bst, ja->ja_addr,
OSIOP_NREGS, 0, &sc->sc_reg);
if (err) {
printf("%s: failed to map registers, err=%d\n",
sc->sc_dev.dv_xname, err);
return;
}
sc->sc_clock_freq = 50; /* MHz */
sc->sc_ctest7 = 0; /* | OSIOP_CTEST7_TT1 */
sc->sc_dcntl = OSIOP_DCNTL_EA;
/* XXX should check ID in BIOS variables? */
scid = ffs(osiop_read_1(sc, OSIOP_SCID));
if (scid == 0)
scid = 7;
else
scid--;
sc->sc_id = scid;
/*
* Call common attachment
*/
osiop_attach(sc);
/*
* Set up interrupt handler.
*/
jazzio_intr_establish(ja->ja_intr,
(intr_handler_t)osiop_jazzio_intr, sc);
}
/*
* interrupt handler
*/
int
osiop_jazzio_intr(arg)
void *arg;
{
struct osiop_softc *sc = arg;
u_int8_t istat;
/* This is potentially nasty, since the IRQ is level triggered... */
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);
/* Save interrupt details for the back-end interrupt handler */
sc->sc_sstat0 = osiop_read_1(sc, OSIOP_SSTAT0);
sc->sc_istat = istat;
sc->sc_dstat = osiop_read_1(sc, OSIOP_DSTAT);
/* Deal with the interrupt */
osiop_intr(sc);
return (1);
}