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/* $OpenBSD: mc.c,v 1.18 2009/02/17 22:28:40 miod Exp $ */
/*
* Copyright (c) 1995 Theo de Raadt
* 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.
*
* 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.
*/
/*
* VME162/VME172 MCchip
*/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/tty.h>
#include <sys/uio.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/fcntl.h>
#include <sys/device.h>
#include <machine/cpu.h>
#include <machine/autoconf.h>
#include <dev/cons.h>
#include <mvme68k/dev/mcreg.h>
struct mcsoftc {
struct device sc_dev;
vaddr_t sc_vaddr;
paddr_t sc_paddr;
struct mcreg *sc_mc;
struct intrhand sc_nmiih;
};
void mcattach(struct device *, struct device *, void *);
int mcmatch(struct device *, void *, void *);
int mcabort(void *);
int mc_print(void *, const char *);
int mc_scan(struct device *, void *, void *);
struct cfattach mc_ca = {
sizeof(struct mcsoftc), mcmatch, mcattach
};
struct cfdriver mc_cd = {
NULL, "mc", DV_DULL
};
struct mcreg *sys_mc = NULL;
int
mcmatch(parent, vcf, args)
struct device *parent;
void *vcf, *args;
{
struct confargs *ca = args;
struct mcreg *mc = (struct mcreg *)(IIOV(ca->ca_paddr) + MC_MCCHIP_OFF);
if ((cputyp != CPU_172 && cputyp != CPU_162) ||
badvaddr((vaddr_t)mc, 1) || mc->mc_chipid != MC_CHIPID)
return (0);
return (1);
}
int
mc_print(args, bus)
void *args;
const char *bus;
{
struct confargs *ca = args;
if (ca->ca_offset != -1)
printf(" offset 0x%x", ca->ca_offset);
if (ca->ca_ipl > 0)
printf(" ipl %d", ca->ca_ipl);
return (UNCONF);
}
int
mc_scan(parent, child, args)
struct device *parent;
void *child, *args;
{
struct cfdata *cf = child;
struct mcsoftc *sc = (struct mcsoftc *)parent;
struct confargs *ca = args;
struct confargs oca;
bzero(&oca, sizeof oca);
oca.ca_iot = ca->ca_iot;
oca.ca_dmat = ca->ca_dmat;
oca.ca_offset = cf->cf_loc[0];
oca.ca_ipl = cf->cf_loc[1];
if (oca.ca_offset != -1 && ISIIOVA(sc->sc_vaddr + oca.ca_offset)) {
oca.ca_vaddr = sc->sc_vaddr + oca.ca_offset;
oca.ca_paddr = sc->sc_paddr + oca.ca_offset;
} else {
oca.ca_vaddr = (vaddr_t)-1;
oca.ca_paddr = (paddr_t)-1;
}
oca.ca_bustype = BUS_MC;
oca.ca_name = cf->cf_driver->cd_name;
if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0)
return (0);
config_attach(parent, cf, &oca, mc_print);
return (1);
}
void
mcattach(parent, self, args)
struct device *parent, *self;
void *args;
{
struct confargs *ca = args;
struct mcsoftc *sc = (struct mcsoftc *)self;
if (sys_mc)
panic("mc already attached!");
/*
* since we know ourself to land in intiobase land,
* we must adjust our address
*/
sc->sc_paddr = ca->ca_paddr;
sc->sc_vaddr = IIOV(sc->sc_paddr);
sc->sc_mc = (struct mcreg *)(sc->sc_vaddr + MC_MCCHIP_OFF);
sys_mc = sc->sc_mc;
printf(": rev %d\n", sc->sc_mc->mc_chiprev);
sc->sc_nmiih.ih_fn = mcabort;
sc->sc_nmiih.ih_ipl = 7;
sc->sc_nmiih.ih_wantframe = 1;
mcintr_establish(MCV_ABORT, &sc->sc_nmiih, self->dv_xname);
sc->sc_mc->mc_abortirq = 7 | MC_IRQ_IEN | MC_IRQ_ICLR;
sc->sc_mc->mc_vecbase = MC_VECBASE;
sc->sc_mc->mc_genctl |= MC_GENCTL_IEN; /* global irq enable */
config_search(mc_scan, self, args);
}
/*
* MC interrupts land in a MC_NVEC sized hole starting at MC_VECBASE
*/
int
mcintr_establish(vec, ih, name)
int vec;
struct intrhand *ih;
const char *name;
{
#ifdef DIAGNOSTIC
if (vec < 0 || vec >= MC_NVEC)
panic("mcintr_establish: illegal vector for %s: 0x%x",
name, vec);
#endif
return intr_establish(MC_VECBASE + vec, ih, name);
}
int
mcabort(frame)
void *frame;
{
/* wait for it to debounce */
while (sys_mc->mc_abortirq & MC_ABORT_ABS)
;
sys_mc->mc_abortirq = sys_mc->mc_abortirq | MC_IRQ_ICLR;
nmihand(frame);
return (1);
}
#include "flash.h"
#if NFLASH > 0
void
mc_enableflashwrite(on)
int on;
{
struct mcsoftc *sc = (struct mcsoftc *) mc_cd.cd_devs[0];
volatile u_char *ena, x;
/*
* Check MC chip revision, as the way to enable flash writes
* has been changed from a memory location in BBRAM to a
* bit in the Flash Control Reg. XXX - smurph
*/
if (sc->sc_mc->mc_chiprev == 0x01) {
if (on)
sc->sc_mc->mc_flashctl |= MC_FLASHCTL_WRITE;
else
sc->sc_mc->mc_flashctl &= ~MC_FLASHCTL_WRITE;
} else {
ena = (u_char *)sc->sc_vaddr +
(on ? MC_ENAFLASHWRITE_OFFSET : MC_DISFLASHWRITE_OFFSET);
x = *ena;
}
}
/*
* Function to check if we booted from flash or prom.
* If we booted from PROM, flash mem is available.
*/
int
mc_hasflash(void)
{
struct mcsoftc *sc = (struct mcsoftc *) mc_cd.cd_devs[0];
if (sc->sc_mc->mc_input & MC_INPUT_PROM)
return 1;
else
return 0;
}
#endif
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