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/* $OpenBSD: pcppi.c,v 1.1 1999/01/02 00:02:44 niklas Exp $ */
/* $NetBSD: pcppi.c,v 1.1 1998/04/15 20:26:18 drochner 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/proc.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <machine/bus.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
#include <dev/isa/pcppireg.h>
#include <dev/isa/pcppivar.h>
#include <dev/ic/i8253reg.h>
struct pcppi_softc {
struct device sc_dv;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ppi_ioh, sc_pit1_ioh;
int sc_bellactive, sc_bellpitch;
int sc_slp;
};
#define __BROKEN_INDIRECT_CONFIG /* XXX */
#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
};
static void pcppi_bell_stop __P((void*));
#define PCPPIPRI (PZERO - 1)
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_iobase != IO_PPI) ||
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, IO_TIMER1, 4, 0, &pit1_ioh))
goto lose;
have_pit1 = 1;
if (bus_space_map(ia->ia_iot, IO_PPI, 1, 0, &ppi_ioh))
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, 0); /* XXX */
bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v ^ 0x01); /* XXX */
nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */
if (((nv ^ v) & 0x01) == 0x01)
rv = 1;
bus_space_write_1(ia->ia_iot, ppi_ioh, 0, v); /* XXX */
nv = bus_space_read_1(ia->ia_iot, ppi_ioh, 0); /* XXX */
if (((nv ^ v) & 0x01) != 0x00) {
rv = 0;
goto lose;
}
/*
* 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, 1);
if (rv) {
ia->ia_iobase = IO_PPI;
ia->ia_iosize = 0x1;
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;
bus_space_tag_t iot;
struct pcppi_attach_args pa;
sc->sc_iot = iot = ia->ia_iot;
if (bus_space_map(iot, IO_TIMER1, 4, 0, &sc->sc_pit1_ioh) ||
bus_space_map(iot, IO_PPI, 1, 0, &sc->sc_ppi_ioh))
panic("pcppi_attach: couldn't map");
printf("\n");
sc->sc_bellactive = sc->sc_bellpitch = sc->sc_slp = 0;
pa.pa_cookie = sc;
while (config_found(self, &pa, 0));
}
void
pcppi_bell(self, pitch, period, slp)
pcppi_tag_t self;
int pitch, period;
int slp;
{
struct pcppi_softc *sc = self;
int s1, s2;
s1 = spltty(); /* ??? */
if (sc->sc_bellactive) {
untimeout(pcppi_bell_stop, sc);
if (sc->sc_slp)
wakeup(pcppi_bell_stop);
}
if (pitch == 0 || period == 0) {
pcppi_bell_stop(sc);
sc->sc_bellpitch = 0;
splx(s1);
return;
}
if (!sc->sc_bellactive || sc->sc_bellpitch != pitch) {
s2 = splhigh();
bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_MODE,
TIMER_SEL2 | TIMER_16BIT | TIMER_SQWAVE);
bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2,
TIMER_DIV(pitch) % 256);
bus_space_write_1(sc->sc_iot, sc->sc_pit1_ioh, TIMER_CNTR2,
TIMER_DIV(pitch) / 256);
splx(s2);
/* enable speaker */
bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0,
bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0)
| PIT_SPKR);
}
sc->sc_bellpitch = pitch;
sc->sc_bellactive = 1;
timeout(pcppi_bell_stop, sc, period);
if (slp) {
sc->sc_slp = 1;
tsleep(pcppi_bell_stop, PCPPIPRI | PCATCH, "bell", 0);
sc->sc_slp = 0;
}
splx(s1);
}
static void
pcppi_bell_stop(arg)
void *arg;
{
struct pcppi_softc *sc = arg;
int s;
s = spltty(); /* ??? */
/* disable bell */
bus_space_write_1(sc->sc_iot, sc->sc_ppi_ioh, 0,
bus_space_read_1(sc->sc_iot, sc->sc_ppi_ioh, 0)
& ~PIT_SPKR);
sc->sc_bellactive = 0;
if (sc->sc_slp)
wakeup(pcppi_bell_stop);
splx(s);
}
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