NetBSD/sys/arch/hp300/dev/dio.c

349 lines
7.9 KiB
C

/* $NetBSD: dio.c,v 1.10 1997/10/09 09:06:49 jtc Exp $ */
/*-
* Copyright (c) 1996, 1997 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.
*/
/*
* Autoconfiguration and mapping support for the DIO bus.
*/
#define _HP300_INTR_H_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <machine/autoconf.h>
#include <machine/cpu.h>
#include <machine/hp300spu.h>
#include <hp300/dev/dmavar.h>
#include <hp300/dev/dioreg.h>
#include <hp300/dev/diovar.h>
#include <hp300/dev/diodevs.h>
#include <hp300/dev/diodevs_data.h>
extern caddr_t internalhpib;
int dio_scodesize __P((struct dio_attach_args *));
char *dio_devinfo __P((struct dio_attach_args *, char *, size_t));
int diomatch __P((struct device *, struct cfdata *, void *));
void dioattach __P((struct device *, struct device *, void *));
int dioprint __P((void *, const char *));
int diosubmatch __P((struct device *, struct cfdata *, void *));
struct cfattach dio_ca = {
sizeof(struct device), diomatch, dioattach
};
struct cfdriver dio_cd = {
NULL, "dio", DV_DULL
};
int
diomatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
static int dio_matched = 0;
/* Allow only one instance. */
if (dio_matched)
return (0);
dio_matched = 1;
return (1);
}
void
dioattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct dio_attach_args da;
caddr_t pa, va;
int scode, scmax, didmap, scodesize;
scmax = DIO_SCMAX(machineid);
printf(": ");
dmainit();
for (scode = 0; scode < scmax; ) {
if (DIO_INHOLE(scode)) {
scode++;
continue;
}
didmap = 0;
/*
* Temporarily map the space corresponding to
* the current select code unless:
* - this is the internal hpib select code,
* - this is the console select code.
*/
pa = dio_scodetopa(scode);
if (scode == conscode)
va = conaddr;
else if ((scode == 7) && internalhpib)
va = internalhpib = (caddr_t)IIOV(pa);
else {
va = iomap(pa, NBPG);
if (va == NULL) {
printf("%s: can't map scode %d\n",
self->dv_xname, scode);
scode++;
continue;
}
didmap = 1;
}
/* Check for hardware. */
if (badaddr(va)) {
if (didmap)
iounmap(va, NBPG);
scode++;
continue;
}
/* Fill out attach args. */
bzero(&da, sizeof(da));
da.da_scode = scode;
da.da_id = DIO_ID(va);
if (DIO_ISFRAMEBUFFER(da.da_id))
da.da_secid = DIO_SECID(va);
da.da_size = DIO_SIZE(scode, va);
scodesize = dio_scodesize(&da);
if (DIO_ISDIO(scode))
da.da_size *= scodesize;
/* No longer need the device to be mapped. */
if (didmap)
iounmap(va, NBPG);
/* Attach matching device. */
config_found_sm(self, &da, dioprint, diosubmatch);
scode += scodesize;
}
}
int
diosubmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct dio_attach_args *da = aux;
if (cf->diocf_scode != DIOCF_SCODE_DEFAULT &&
cf->diocf_scode != da->da_scode)
return (0);
return ((*cf->cf_attach->ca_match)(parent, cf, aux));
}
int
dioprint(aux, pnp)
void *aux;
const char *pnp;
{
struct dio_attach_args *da = aux;
char buf[128];
if (pnp)
printf("%s at %s", dio_devinfo(da, buf, sizeof(buf)), pnp);
printf(" scode %d", da->da_scode);
return (UNCONF);
}
/*
* Convert a select code to a system physical address.
*/
void *
dio_scodetopa(scode)
int scode;
{
u_long rval;
if (scode == 7 && internalhpib)
rval = DIO_IHPIBADDR;
else if (DIO_ISDIO(scode))
rval = DIO_BASE + (scode * DIO_DEVSIZE);
else if (DIO_ISDIOII(scode))
rval = DIOII_BASE + ((scode - DIOII_SCBASE) * DIOII_DEVSIZE);
else
rval = 0;
return ((void *)rval);
}
/*
* Return the select code size for this device, defaulting to 1
* if we don't know what kind of device we have.
*/
int
dio_scodesize(da)
struct dio_attach_args *da;
{
int i;
/*
* Deal with lame internal HP-IB controllers which don't have
* consistent/reliable device ids.
*/
if (da->da_scode == 7 && internalhpib)
return (1);
/*
* Find the dio_devdata matchind the primary id.
* If we're a framebuffer, we also check the secondary id.
*/
for (i = 0; i < DIO_NDEVICES; i++) {
if (da->da_id == dio_devdatas[i].dd_id) {
if (DIO_ISFRAMEBUFFER(da->da_id)) {
if (da->da_secid == dio_devdatas[i].dd_secid) {
goto foundit;
}
} else {
foundit:
return (dio_devdatas[i].dd_nscode);
}
}
}
/*
* Device is unknown. Print a warning and assume a default.
*/
printf("WARNING: select code size unknown for id = 0x%x secid = 0x%x\n",
da->da_id, da->da_secid);
return (1);
}
/*
* Return a reasonable description of a DIO device.
*/
char *
dio_devinfo(da, buf, buflen)
struct dio_attach_args *da;
char *buf;
size_t buflen;
{
#ifdef DIOVERBOSE
int i;
#endif
bzero(buf, buflen);
/*
* Deal with lame internal HP-IB controllers which don't have
* consistent/reliable device ids.
*/
if (da->da_scode == 7 && internalhpib) {
sprintf(buf, DIO_DEVICE_DESC_IHPIB);
return (buf);
}
#ifdef DIOVERBOSE
/*
* Find the description matching our primary id.
* If we're a framebuffer, we also check the secondary id.
*/
for (i = 0; i < DIO_NDEVICES; i++) {
if (da->da_id == dio_devdescs[i].dd_id) {
if (DIO_ISFRAMEBUFFER(da->da_id)) {
if (da->da_secid == dio_devdescs[i].dd_secid) {
goto foundit;
}
} else {
foundit:
sprintf(buf, "%s", dio_devdescs[i].dd_desc);
return (buf);
}
}
}
#endif /* DIOVERBOSE */
/*
* Device is unknown. Construct something reasonable.
*/
sprintf(buf, "device id = 0x%x secid = 0x%x",
da->da_id, da->da_secid);
return (buf);
}
/*
* Establish an interrupt handler for a DIO device.
*/
void *
dio_intr_establish(func, arg, ipl, priority)
int (*func) __P((void *));
void *arg;
int ipl;
int priority;
{
void *ih;
ih = intr_establish(func, arg, ipl, priority);
if (priority == IPL_BIO)
dmacomputeipl();
return (ih);
}
/*
* Remove an interrupt handler for a DIO device.
*/
void
dio_intr_disestablish(arg)
void *arg;
{
struct isr *isr = arg;
int priority = isr->isr_priority;
intr_disestablish(arg);
if (priority == IPL_BIO)
dmacomputeipl();
}