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/* $NetBSD: pcppi.c,v 1.3 1996/12/05 01:39:31 cgd Exp $ */
/*
* Copyright (c) 1996 Carnegie-Mellon University.
* All rights reserved.
*
* Author: 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/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <alpha/isa/pcppivar.h>
struct pcppi_softc {
struct device sc_dv;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_pit1_ioh, sc_ppi_ioh;
};
#ifdef __BROKEN_INDIRECT_CONFIG
int pcppi_match __P((struct device *, void *, void *));
#else
int pcppi_match __P((struct device *, struct cfdata *, void *));
#endif
void pcppi_attach __P((struct device *, struct device *, void *));
struct cfattach pcppi_ca = {
sizeof(struct pcppi_softc), pcppi_match, pcppi_attach,
};
struct cfdriver pcppi_cd = {
NULL, "pcppi", DV_DULL,
};
int pcppiprint __P((void *, const char *));
int
pcppi_match(parent, match, aux)
struct device *parent;
#ifdef __BROKEN_INDIRECT_CONFIG
void *match;
#else
struct cfdata *match;
#endif
void *aux;
{
struct isa_attach_args *ia = aux;
bus_space_handle_t ppi_ioh, pit1_ioh;
int have_pit1, have_ppi, rv;
u_int8_t v, nv;
/* If values are hardwired to something that they can't be, punt. */
if (ia->ia_iobase != IOBASEUNK || /* ia->ia_iosize != 0 || XXX isa.c */
ia->ia_maddr != MADDRUNK || ia->ia_msize != 0 ||
ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK)
return (0);
rv = 0;
have_pit1 = have_ppi = 0;
if (bus_space_map(ia->ia_iot, 0x40, 4, 0, &pit1_ioh)) /* XXX */
goto lose;
have_pit1 = 1;
if (bus_space_map(ia->ia_iot, 0x60, 4, 0, &ppi_ioh)) /* XXX */
goto lose;
have_ppi = 1;
/*
* Check for existence of PPI. Realistically, this is either going to
* be here or nothing is going to be here.
*
* We don't want to have any chance of changing speaker output (which
* this test might, if it crashes in the middle, or something;
* normally it's be to quick to produce anthing audible), but
* many "combo chip" mock-PPI's don't seem to support the top bit
* of Port B as a settable bit. The bottom bit has to be settable,
* since the speaker driver hardware still uses it.
*/
v = bus_space_read_1(ia->ia_iot, ppi_ioh, 1); /* XXX */
bus_space_write_1(ia->ia_iot, ppi_ioh, 1, v ^ 0x01); /* XXX */
nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 1); /* XXX */
if (((nv ^ v) & 0x01) == 0x01)
rv = 1;
bus_space_write_1(ia->ia_iot, ppi_ioh, 1, v); /* XXX */
nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 1); /* XXX */
if (((nv ^ v) & 0x01) != 0x00)
rv = 0;
/*
* We assume that the programmable interval timer is there.
*/
lose:
if (have_pit1)
bus_space_unmap(ia->ia_iot, pit1_ioh, 4);
if (have_ppi)
bus_space_unmap(ia->ia_iot, ppi_ioh, 4);
if (rv) {
ia->ia_iobase = 0x60;
ia->ia_iosize = 0x5;
ia->ia_msize = 0x0;
}
return (rv);
}
void
pcppi_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct pcppi_softc *sc = (struct pcppi_softc *)self;
struct isa_attach_args *ia = aux;
struct pcppi_attach_args pa;
bus_space_tag_t iot;
sc->sc_iot = iot = ia->ia_iot;
if (bus_space_map(iot, 0x40, 4, 0, &sc->sc_pit1_ioh) || /*XXX*/
bus_space_map(iot, 0x60, 5, 0, &sc->sc_ppi_ioh)) /*XXX*/
panic("pcppi_attach: couldn't map");
printf("\n");
pa.pa_slot = PCPPI_KBD_SLOT;
pa.pa_iot = iot; /* XXX */
pa.pa_ioh = sc->sc_ppi_ioh; /* XXX */
pa.pa_pit_ioh = sc->sc_pit1_ioh; /* XXX */
pa.pa_delaybah = ia->ia_delaybah; /* XXX */
pa.pa_ic = ia->ia_ic; /* XXX */
config_found(self, &pa, pcppiprint);
/* XXX SHOULD ONLY ATTACH IF SOMETHING IS THERE */
pa.pa_slot = PCPPI_AUX_SLOT;
pa.pa_iot = iot; /* XXX */
pa.pa_ioh = sc->sc_ppi_ioh; /* XXX */
pa.pa_pit_ioh = sc->sc_pit1_ioh; /* XXX */
pa.pa_delaybah = ia->ia_delaybah; /* XXX */
pa.pa_ic = ia->ia_ic; /* XXX */
config_found(self, &pa, pcppiprint);
}
int
pcppiprint(aux, pnp)
void *aux;
const char *pnp;
{
struct pcppi_attach_args *pa = aux;
const char *type;
switch (pa->pa_slot) {
case PCPPI_KBD_SLOT:
type = "pckbd";
break;
case PCPPI_AUX_SLOT:
type = "pms";
/* XXX XXX XXX should make sure it's there before configuring */
return (QUIET);
break;
default:
panic("pcppiprint: bad slot");
}
if (pnp)
printf("%s at %s", type, pnp);
return (UNCONF);
}
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