freebsd-skq/sys/powerpc/powermac/openpic_macio.c
Nathan Whitehorn feb8a1f5f5 Work around broken device tree on last-generation PowerPC iMacs
(PowerMac12,1), which have a mac-io MPIC cell that indifies itself
as the root PIC despite the actual root PIC being on the northbridge.
No CPC945 systems have a mac-io PIC that does anything so just don't
attach on CPC945 (U4) systems.

MFC after:	3 days
2012-10-29 14:27:28 +00:00

111 lines
3.2 KiB
C

/*-
* Copyright 2003 by Peter Grehan. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#include <machine/intr_machdep.h>
#include <machine/md_var.h>
#include <machine/pio.h>
#include <machine/resource.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <sys/rman.h>
#include <machine/openpicvar.h>
#include "pic_if.h"
/*
* MacIO interface
*/
static int openpic_macio_probe(device_t);
static int openpic_macio_attach(device_t);
static device_method_t openpic_macio_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, openpic_macio_probe),
DEVMETHOD(device_attach, openpic_macio_attach),
/* PIC interface */
DEVMETHOD(pic_bind, openpic_bind),
DEVMETHOD(pic_config, openpic_config),
DEVMETHOD(pic_dispatch, openpic_dispatch),
DEVMETHOD(pic_enable, openpic_enable),
DEVMETHOD(pic_eoi, openpic_eoi),
DEVMETHOD(pic_ipi, openpic_ipi),
DEVMETHOD(pic_mask, openpic_mask),
DEVMETHOD(pic_unmask, openpic_unmask),
{ 0, 0 },
};
static driver_t openpic_macio_driver = {
"openpic",
openpic_macio_methods,
sizeof(struct openpic_softc),
};
DRIVER_MODULE(openpic, macio, openpic_macio_driver, openpic_devclass, 0, 0);
static int
openpic_macio_probe(device_t dev)
{
const char *type = ofw_bus_get_type(dev);
if (strcmp(type, "open-pic") != 0)
return (ENXIO);
/* On some U4 systems, there is a phantom MPIC in the mac-io cell */
if (OF_finddevice("/u4") != (phandle_t)-1)
return (ENXIO);
device_set_desc(dev, OPENPIC_DEVSTR);
return (0);
}
static int
openpic_macio_attach(device_t dev)
{
return (openpic_common_attach(dev, ofw_bus_get_node(dev)));
}