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/* $OpenBSD: pgs.c,v 1.2 2011/02/19 22:15:11 kettenis Exp $ */
/*
* Copyright (c) 2010 Jasper Lievisse Adriaanse <jasper@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This driver allows entering DDB by pushing the "Programmers Switch",
* which can be found on most any modern world MacPPC.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <ddb/db_var.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#include <machine/autoconf.h>
struct pgs_softc {
struct device sc_dev;
int sc_node;
int sc_intr;
};
void pgs_attach(struct device *, struct device *, void *);
int pgs_match(struct device *, void *, void *);
int pgs_intr(void *);
struct cfattach pgs_ca = {
sizeof(struct pgs_softc), pgs_match, pgs_attach
};
struct cfdriver pgs_cd = {
NULL, "pgs", DV_DULL
};
int
pgs_match(struct device *parent, void *arg, void *aux)
{
struct confargs *ca = aux;
char type[32];
if (strcmp(ca->ca_name, "programmer-switch") != 0)
return 0;
OF_getprop(ca->ca_node, "device_type", type, sizeof(type));
if (strcmp(type, "programmer-switch") != 0)
return 0;
return 1;
}
void
pgs_attach(struct device *parent, struct device *self, void *aux)
{
struct pgs_softc *sc = (struct pgs_softc *)self;
struct confargs *ca = aux;
int intr[2];
sc->sc_node = ca->ca_node;
OF_getprop(sc->sc_node, "interrupts", intr, sizeof(intr));
sc->sc_intr = intr[0];
printf(": irq %d\n", sc->sc_intr);
mac_intr_establish(parent, sc->sc_intr, IST_LEVEL,
IPL_HIGH, pgs_intr, sc, sc->sc_dev.dv_xname);
}
int
pgs_intr(void *v)
{
#ifdef DDB
if (db_console)
Debugger();
#else
printf("programmer-switch pressed, debugger not available.\n");
#endif
return 1;
}
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