/* $OpenBSD: frodo.c,v 1.11 2007/01/14 17:54:45 miod Exp $ */
/* $NetBSD: frodo.c,v 1.5 1999/07/31 21:15:20 thorpej Exp $ */
/*-
* Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 1997 Michael Smith. 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 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 AUTHOR 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.
*/
/*
* Support for the "Frodo" (a.k.a. "Apollo Utility") chip found
* in HP Apollo 9000/4xx workstations, as well as HP 9000/362 and 9000/382.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <machine/hp300spu.h>
#include <hp300/dev/intiovar.h>
#include <hp300/dev/frodoreg.h>
#include <hp300/dev/frodovar.h>
#include "isabr.h"
#if NISABR > 0
#include <uvm/uvm_extern.h>
#include <dev/isa/isareg.h>
#include <hp300/dev/isabrreg.h>
#endif
struct frodo_softc {
struct device sc_dev; /* generic device glue */
volatile u_int8_t *sc_regs; /* register base */
struct isr *sc_intr[FRODO_NINTR]; /* interrupt handlers */
struct isr sc_isr; /* main interrupt handler */
u_int sc_refcnt; /* number of interrupt refs */
};
int frodomatch(struct device *, void *, void *);
void frodoattach(struct device *, struct device *, void *);
int frodoprint(void *, const char *);
int frodosubmatch(struct device *, void *, void *);
int frodointr(void *);
void frodo_imask(struct frodo_softc *, u_int16_t, u_int16_t);
int frodo_isa_exists(void);
void frodo_state(struct frodo_softc *);
struct cfattach frodo_ca = {
sizeof(struct frodo_softc), frodomatch, frodoattach
};
struct cfdriver frodo_cd = {
NULL, "frodo", DV_DULL
};
struct frodo_attach_args frodo_subdevs[] = {
{ "dnkbd", NULL, FRODO_APCI_OFFSET(0), FRODO_INTR_APCI0 },
{ "apci", NULL, FRODO_APCI_OFFSET(1), FRODO_INTR_APCI1 },
{ "apci", NULL, FRODO_APCI_OFFSET(2), FRODO_INTR_APCI2 },
{ "apci", NULL, FRODO_APCI_OFFSET(3), FRODO_INTR_APCI3 },
{ NULL, NULL, 0, 0 },
};
#define FRODO_IPL 5
int
frodomatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct intio_attach_args *ia = aux;
caddr_t va;
static int frodo_matched = 0;
/* only allow one instance */
if (frodo_matched)
return (0);
/* only specific workstations can have this */
switch (machineid) {
case HP_362:
case HP_382:
case HP_400:
case HP_425:
case HP_433:
break;
default:
return (0);
}
/* make sure the hardware is there in any case */
va = (caddr_t)IIOV(FRODO_BASE);
if (badaddr(va))
return (0);
frodo_matched = 1;
ia->ia_addr = (caddr_t)FRODO_BASE;
return (1);
}
void
frodoattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct frodo_softc *sc = (struct frodo_softc *)self;
struct intio_attach_args *ia = aux;
int i;
sc->sc_regs = (volatile u_int8_t *)IIOV(ia->ia_addr);
printf(" ipl %d", FRODO_IPL);
if ((FRODO_READ(sc, FRODO_IISR) & FRODO_IISR_SERVICE) == 0)
printf(": service mode enabled");
printf("\n");
/* Clear all of the interrupt handlers. */
bzero(sc->sc_intr, sizeof(sc->sc_intr));
/*
* Disable all of the interrupt lines; we reenable them
* as subdevices attach.
*/
frodo_imask(sc, 0, 0xffff);
/* Clear any pending interrupts. */
FRODO_WRITE(sc, FRODO_PIC_PU, 0xff);
FRODO_WRITE(sc, FRODO_PIC_PL, 0xff);
/* Set interrupt polarities... */
FRODO_WRITE(sc, FRODO_PIO_IPR, 0x10);
/* ...and configure 1-5 for edge triggering. */
FRODO_WRITE(sc, FRODO_PIO_IELR, 0xc1);
/* Initialize IVR high half to zero so we don't need to mask it later */
FRODO_WRITE(sc, FRODO_PIC_IVR, 0x00);
/* Mask ISA interrupts until an ISA interrupt handler is registered. */
FRODO_WRITE(sc, FRODO_PIO_ISA_CONTROL, 0x80);
/*
* We defer hooking up our interrupt handler until
* a subdevice hooks up theirs.
*/
sc->sc_refcnt = 0;
/* ... and attach subdevices. */
for (i = 0; frodo_subdevs[i].fa_name != NULL; i++) {
/*
* Skip the first serial port if we're not a 425e;
* it's mapped to the DCA at select code 9 on all
* other models.
*/
if (frodo_subdevs[i].fa_offset == FRODO_APCI_OFFSET(1) &&
mmuid != MMUID_425_E)
continue;
frodo_subdevs[i].fa_tag = ia->ia_tag;
config_found_sm(self, &frodo_subdevs[i],
frodoprint, frodosubmatch);
}
#if NISABR > 0
/*
* Only attempt to attach the isa bridge if it exists on this
* machine.
*/
if (frodo_isa_exists()) {
struct frodo_attach_args fa;
fa.fa_name = "isabr";
fa.fa_tag = ia->ia_tag;
fa.fa_offset = fa.fa_line = 0;
config_found_sm(self, &fa, frodoprint, frodosubmatch);
}
#endif
}
int
frodosubmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
struct frodo_attach_args *fa = aux;
if (cf->frodocf_offset != FRODO_UNKNOWN_OFFSET &&
cf->frodocf_offset != fa->fa_offset)
return (0);
return ((*cf->cf_attach->ca_match)(parent, cf, aux));
}
int
frodoprint(aux, pnp)
void *aux;
const char *pnp;
{
struct frodo_attach_args *fa = aux;
if (pnp)
printf("%s at %s", fa->fa_name, pnp);
printf(" offset 0x%x", fa->fa_offset);
return (UNCONF);
}
int
frodo_intr_establish(struct device *frdev, int line, struct isr *isr,
const char *name)
{
struct frodo_softc *sc = (struct frodo_softc *)frdev;
int priority = isr->isr_priority;
if (line <= 0 || line >= FRODO_NINTR) {
panic("%s: bad interrupt line %d",
sc->sc_dev.dv_xname, line);
}
if (sc->sc_intr[line] != NULL) {
#ifdef DEBUG
printf("%s: interrupt line %d already used\n",
sc->sc_dev.dv_xname, line);
#endif
return (EPERM);
}
/*
* If this is the first one, establish the frodo
* interrupt handler. If not, reestablish at a
* higher priority if necessary.
*/
if (sc->sc_isr.isr_priority < priority) {
if (sc->sc_refcnt != 0)
intr_disestablish(&sc->sc_isr);
sc->sc_isr.isr_func = frodointr;
sc->sc_isr.isr_arg = sc;
sc->sc_isr.isr_ipl = FRODO_IPL;
sc->sc_isr.isr_priority = priority;
intr_establish(&sc->sc_isr, sc->sc_dev.dv_xname);
}
sc->sc_refcnt++;
/* Install the handler. */
isr->isr_ipl = sc->sc_isr.isr_ipl;
evcount_attach(&isr->isr_count, name, &isr->isr_ipl, &evcount_intr);
sc->sc_intr[line] = isr;
/* Enable the interrupt line. */
frodo_imask(sc, FRODO_INTR_BIT(line), 0);
#if NISABR > 0
/* Unmask ISA interrupts if necessary. */
if (FRODO_INTR_ISA(line))
FRODO_WRITE(sc, FRODO_PIO_ISA_CONTROL, 0x00);
#endif
return (0);
}
void
frodo_intr_disestablish(frdev, line)
struct device *frdev;
int line;
{
struct frodo_softc *sc = (struct frodo_softc *)frdev;
int newpri;
#ifdef DIAGNOSTIC
if (sc->sc_intr[line] == NULL) {
printf("%s(%s): no handler for line %d",
sc->sc_dev.dv_xname, __func__, line);
return;
}
#endif
sc->sc_intr[line] = NULL;
frodo_imask(sc, 0, FRODO_INTR_BIT(line));
#if NISABR > 0
/* Mask ISA interrupts if necessary. */
if (FRODO_INTR_ISA(line)) {
if (sc->sc_intr[FRODO_INTR_ILOW] == NULL &&
sc->sc_intr[FRODO_INTR_IMID] == NULL &&
sc->sc_intr[FRODO_INTR_IHI] == NULL)
FRODO_WRITE(sc, FRODO_PIO_ISA_CONTROL, 0x80);
}
#endif
/* If this was the last, unhook ourselves. */
if (sc->sc_refcnt-- == 1) {
intr_disestablish(&sc->sc_isr);
return;
}
/* Lower our priority, if appropriate. */
for (newpri = 0, line = 0; line < FRODO_NINTR; line++)
if (sc->sc_intr[line] != NULL &&
sc->sc_intr[line]->isr_priority > newpri)
newpri = sc->sc_intr[line]->isr_priority;
if (newpri != sc->sc_isr.isr_priority) {
intr_disestablish(&sc->sc_isr);
sc->sc_isr.isr_func = frodointr;
sc->sc_isr.isr_arg = sc;
sc->sc_isr.isr_ipl = FRODO_IPL;
sc->sc_isr.isr_priority = newpri;
intr_establish(&sc->sc_isr, sc->sc_dev.dv_xname);
}
}
int
frodointr(arg)
void *arg;
{
struct frodo_softc *sc = arg;
struct isr *fisr;
int pending, line, rc = 0;
#ifdef DEBUG
frodo_state(sc);
#endif
/* Any interrupts pending? */
while ((pending = FRODO_GETPEND(sc)) != 0) {
rc++;
/*
* Get pending interrupt; this also clears it for us.
*/
line = FRODO_READ(sc, FRODO_PIC_ACK) /* & 0x0f */;
fisr = sc->sc_intr[line];
if (fisr == NULL) {
printf("%s: unhandled interrupt on line %d\n",
sc->sc_dev.dv_xname, line);
#ifdef DEBUG
/* Disable interrupt source */
frodo_imask(sc, 0, FRODO_INTR_BIT(line));
#endif
} else {
if ((*fisr->isr_func)(fisr->isr_arg) != 0) {
fisr->isr_count.ec_count++;
} else {
printf("%s: spurious interrupt on line %d\n",
sc->sc_dev.dv_xname, line);
}
}
if (rc > 100)
panic("frodointr: looping, pending %x line %d fisr %p",
pending, line, fisr);
#ifdef DEBUG
frodo_state(sc);
#endif
}
return (rc);
}
void
frodo_imask(sc, set, clear)
struct frodo_softc *sc;
u_int16_t set, clear;
{
u_int16_t imask;
imask = FRODO_GETMASK(sc);
imask |= set;
imask &= ~clear;
FRODO_SETMASK(sc, imask);
}
#ifdef DEBUG
void
frodo_state(struct frodo_softc *sc)
{
int i;
printf("%s state:", sc->sc_dev.dv_xname);
for (i = 0xc0; i < 0x100; i += 4) {
printf(" %02x", FRODO_READ(sc, i));
if (i == 0xcc || i == 0xdc || i == 0xec)
printf(" /");
}
printf("\n");
}
#endif
#if NISABR > 0
int
frodo_isa_exists()
{
vaddr_t va;
int rv;
va = uvm_km_valloc(kernel_map, PAGE_SIZE);
if (va == NULL)
return (0);
/*
* Check that the iomem space answers probes
*/
pmap_kenter_cache(va, ISABR_IOMEM_BASE, PG_RW | PG_CI);
pmap_update(pmap_kernel());
rv = badbaddr((caddr_t)va);
pmap_kremove(va, PAGE_SIZE);
pmap_update(pmap_kernel());
/*
* Check that the ioport space answers probes
*/
pmap_kenter_cache(va, ISABR_IOPORT_BASE, PG_RW | PG_CI);
pmap_update(pmap_kernel());
rv |= badbaddr((caddr_t)va);
pmap_kremove(va, PAGE_SIZE);
pmap_update(pmap_kernel());
uvm_km_free(kernel_map, va, PAGE_SIZE);
return (!rv);
}
#endif
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