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NetBSD/sys/arch/alpha/tc/ioasic.c

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/* $NetBSD: ioasic.c,v 1.4 1996/04/12 06:09:48 cgd Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Keith Bostic, Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/pte.h>
#include <machine/rpb.h>
#include <dev/tc/tcvar.h>
#include <alpha/tc/ioasicreg.h>
#include <dev/tc/ioasicvar.h>
struct ioasic_softc {
struct device sc_dv;
tc_addr_t sc_base;
void *sc_cookie;
};
/* Definition of the driver for autoconfig. */
int ioasicmatch __P((struct device *, void *, void *));
void ioasicattach __P((struct device *, struct device *, void *));
int ioasicprint(void *, char *);
struct cfattach ioasic_ca = {
sizeof(struct ioasic_softc), ioasicmatch, ioasicattach,
};
struct cfdriver ioasic_cd = {
NULL, "ioasic", DV_DULL,
};
int ioasic_intr __P((void *));
int ioasic_intrnull __P((void *));
#define C(x) ((void *)(x))
#define IOASIC_DEV_LANCE 0
#define IOASIC_DEV_SCC0 1
#define IOASIC_DEV_SCC1 2
#define IOASIC_DEV_ISDN 3
#define IOASIC_DEV_BOGUS -1
#define IOASIC_NCOOKIES 4
struct ioasic_dev {
char *iad_modname;
tc_offset_t iad_offset;
void *iad_cookie;
u_int32_t iad_intrbits;
} ioasic_devs[] = {
/* XXX lance name */
{ "lance", 0x000c0000, C(IOASIC_DEV_LANCE), IOASIC_INTR_LANCE, },
{ "z8530 ", 0x00100000, C(IOASIC_DEV_SCC0), IOASIC_INTR_SCC_0, },
{ "z8530 ", 0x00180000, C(IOASIC_DEV_SCC1), IOASIC_INTR_SCC_1, },
{ "TOY_RTC ", 0x00200000, C(IOASIC_DEV_BOGUS), 0, },
{ "AMD79c30", 0x00240000, C(IOASIC_DEV_ISDN), IOASIC_INTR_ISDN, },
};
int ioasic_ndevs = sizeof(ioasic_devs) / sizeof(ioasic_devs[0]);
struct ioasicintr {
int (*iai_func) __P((void *));
void *iai_arg;
} ioasicintrs[IOASIC_NCOOKIES];
tc_addr_t ioasic_base; /* XXX XXX XXX */
/* There can be only one. */
int ioasicfound;
extern int cputype;
int
ioasicmatch(parent, cfdata, aux)
struct device *parent;
void *cfdata;
void *aux;
{
struct tc_attach_args *ta = aux;
/* Make sure that we're looking for this type of device. */
if (strncmp("FLAMG-IO", ta->ta_modname, TC_ROM_LLEN))
return (0);
/* Check that it can actually exist. */
if ((cputype != ST_DEC_3000_500) && (cputype != ST_DEC_3000_300))
panic("ioasicmatch: how did we get here?");
if (ioasicfound)
return (0);
return (1);
}
void
ioasicattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ioasic_softc *sc = (struct ioasic_softc *)self;
struct tc_attach_args *ta = aux;
struct ioasicdev_attach_args ioasicdev;
u_long i;
ioasicfound = 1;
sc->sc_base = ta->ta_addr;
ioasic_base = sc->sc_base; /* XXX XXX XXX */
sc->sc_cookie = ta->ta_cookie;
#ifdef DEC_3000_300
if (cputype == ST_DEC_3000_300) {
*(volatile u_int *)IOASIC_REG_CSR(sc->sc_base) |=
IOASIC_CSR_FASTMODE;
tc_mb();
printf(": slow mode\n");
} else
#endif
printf(": fast mode\n");
/*
* Turn off all device interrupt bits.
* (This does _not_ include 3000/300 TC option slot bits.
*/
for (i = 0; i < ioasic_ndevs; i++)
*(volatile u_int32_t *)IOASIC_REG_IMSK(ioasic_base) &=
~ioasic_devs[i].iad_intrbits;
tc_mb();
/*
* Set up interrupt handlers.
*/
for (i = 0; i < IOASIC_NCOOKIES; i++) {
ioasicintrs[i].iai_func = ioasic_intrnull;
ioasicintrs[i].iai_arg = (void *)i;
}
tc_intr_establish(parent, sc->sc_cookie, TC_IPL_NONE, ioasic_intr, sc);
/*
* Try to configure each device.
*/
for (i = 0; i < ioasic_ndevs; i++) {
strncpy(ioasicdev.iada_modname, ioasic_devs[i].iad_modname,
TC_ROM_LLEN);
ioasicdev.iada_modname[TC_ROM_LLEN] = '\0';
ioasicdev.iada_offset = ioasic_devs[i].iad_offset;
ioasicdev.iada_addr = sc->sc_base + ioasic_devs[i].iad_offset;
ioasicdev.iada_cookie = ioasic_devs[i].iad_cookie;
/* Tell the autoconfig machinery we've found the hardware. */
config_found(self, &ioasicdev, ioasicprint);
}
}
int
ioasicprint(aux, pnp)
void *aux;
char *pnp;
{
struct ioasicdev_attach_args *d = aux;
if (pnp)
printf("%s at %s", d->iada_modname, pnp);
printf(" offset 0x%lx", (long)d->iada_offset);
return (UNCONF);
}
int
ioasic_submatch(match, d)
struct cfdata *match;
struct ioasicdev_attach_args *d;
{
return ((match->ioasiccf_offset == d->iada_offset) ||
(match->ioasiccf_offset == IOASIC_OFFSET_UNKNOWN));
}
void
ioasic_intr_establish(ioa, cookie, level, func, arg)
struct device *ioa;
void *cookie, *arg;
tc_intrlevel_t level;
int (*func) __P((void *));
{
u_long dev, i;
dev = (u_long)cookie;
#ifdef DIAGNOSTIC
/* XXX check cookie. */
#endif
if (ioasicintrs[dev].iai_func != ioasic_intrnull)
panic("ioasic_intr_establish: cookie %d twice", dev);
ioasicintrs[dev].iai_func = func;
ioasicintrs[dev].iai_arg = arg;
/* Enable interrupts for the device. */
for (i = 0; i < ioasic_ndevs; i++)
if (ioasic_devs[i].iad_cookie == cookie)
break;
if (i == ioasic_ndevs)
panic("ioasic_intr_establish: invalid cookie.");
*(volatile u_int32_t *)IOASIC_REG_IMSK(ioasic_base) |=
ioasic_devs[i].iad_intrbits;
tc_mb();
}
void
ioasic_intr_disestablish(ioa, cookie)
struct device *ioa;
void *cookie;
{
u_long dev, i;
dev = (u_long)cookie;
#ifdef DIAGNOSTIC
/* XXX check cookie. */
#endif
if (ioasicintrs[dev].iai_func == ioasic_intrnull)
panic("ioasic_intr_disestablish: cookie %d missing intr", dev);
/* Enable interrupts for the device. */
for (i = 0; i < ioasic_ndevs; i++)
if (ioasic_devs[i].iad_cookie == cookie)
break;
if (i == ioasic_ndevs)
panic("ioasic_intr_disestablish: invalid cookie.");
*(volatile u_int32_t *)IOASIC_REG_IMSK(ioasic_base) &=
~ioasic_devs[i].iad_intrbits;
tc_mb();
ioasicintrs[dev].iai_func = ioasic_intrnull;
ioasicintrs[dev].iai_arg = (void *)dev;
}
int
ioasic_intrnull(val)
void *val;
{
panic("ioasic_intrnull: uncaught IOASIC intr for cookie %ld\n",
(u_long)val);
}
/*
* asic_intr --
* ASIC interrupt handler.
*/
int
ioasic_intr(val)
void *val;
{
register struct ioasic_softc *sc = val;
register int i, ifound;
int gifound;
u_int32_t sir, junk;
volatile u_int32_t *sirp, *junkp;
sirp = (volatile u_int32_t *)IOASIC_REG_INTR(sc->sc_base);
gifound = 0;
do {
ifound = 0;
tc_syncbus();
sir = *sirp;
/* XXX DUPLICATION OF INTERRUPT BIT INFORMATION... */
#define CHECKINTR(slot, bits) \
if (sir & bits) { \
ifound = 1; \
(*ioasicintrs[slot].iai_func) \
(ioasicintrs[slot].iai_arg); \
}
CHECKINTR(IOASIC_DEV_SCC0, IOASIC_INTR_SCC_0);
CHECKINTR(IOASIC_DEV_SCC1, IOASIC_INTR_SCC_1);
CHECKINTR(IOASIC_DEV_LANCE, IOASIC_INTR_LANCE);
CHECKINTR(IOASIC_DEV_ISDN, IOASIC_INTR_ISDN);
gifound |= ifound;
} while (ifound);
return (gifound);
}
/* XXX */
char *
ioasic_lance_ether_address()
{
return (u_char *)IOASIC_SYS_ETHER_ADDRESS(ioasic_base);
}
void
ioasic_lance_dma_setup(v)
void *v;
{
volatile u_int32_t *ldp;
tc_addr_t tca;
tca = (tc_addr_t)v;
ldp = (volatile u_int *)IOASIC_REG_LANCE_DMAPTR(ioasic_base);
*ldp = ((tca << 3) & ~(tc_addr_t)0x1f) | ((tca >> 29) & 0x1f);
tc_wmb();
*(volatile u_int32_t *)IOASIC_REG_CSR(ioasic_base) |=
IOASIC_CSR_DMAEN_LANCE;
tc_mb();
}
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