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/*
* Copyright 1998 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. 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.
*/
/*-
* Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#include <machine/frame.h>
#include <machine/nexusvar.h>
#include <machine/resource.h>
/*
* The nexus (which is a pseudo-bus actually) iterates over the nodes that
* exist in OpenFirmware and adds them as devices to this bus so that drivers
* can be attached to them.
*
* Maybe this code should get into dev/ofw to some extent, as some of it should
* work for all OpenFirmware based machines...
*/
static MALLOC_DEFINE(M_NEXUS, "nexus", "nexus device information");
struct nexus_devinfo {
phandle_t ndi_node;
/* Some common properties. */
char *ndi_name;
char *ndi_device_type;
};
struct nexus_softc {
};
static int nexus_probe(device_t);
static void nexus_probe_nomatch(device_t, device_t);
static int nexus_read_ivar(device_t, device_t, int, uintptr_t *);
static int nexus_write_ivar(device_t, device_t, int, uintptr_t);
static device_method_t nexus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nexus_probe),
DEVMETHOD(device_attach, bus_generic_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface. Resource management is business of the children... */
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_probe_nomatch, nexus_probe_nomatch),
DEVMETHOD(bus_read_ivar, nexus_read_ivar),
DEVMETHOD(bus_write_ivar, nexus_write_ivar),
{ 0, 0 }
};
static driver_t nexus_driver = {
"nexus",
nexus_methods,
sizeof(struct nexus_softc),
};
static devclass_t nexus_devclass;
DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
static int
nexus_probe(device_t dev)
{
phandle_t root;
phandle_t child, new_node, temp_node;
device_t cdev;
struct nexus_devinfo *dinfo;
struct nexus_softc *sc;
char *name, *type;
if ((root = OF_peer(0)) == -1)
panic("nexus_probe: OF_peer failed.");
child = root;
while (child != 0) {
OF_getprop_alloc(child, "name", 1, (void **)&name);
OF_getprop_alloc(child, "device_type", 1, (void **)&type);
cdev = device_add_child(dev, NULL, -1);
if (cdev != NULL) {
dinfo = malloc(sizeof(*dinfo), M_NEXUS, M_WAITOK);
dinfo->ndi_node = child;
dinfo->ndi_name = name;
dinfo->ndi_device_type = type;
device_set_ivars(cdev, dinfo);
} else
free(name, M_OFWPROP);
next:
new_node = OF_child(child);
if (new_node == -1)
panic("nexus_probe: OF_child return -1");
if (new_node == 0)
new_node = OF_peer(child);
if (new_node == 0) {
temp_node = child;
while (new_node == 0) {
temp_node = OF_parent(temp_node);
if (temp_node == 0)
break;
new_node = OF_peer(temp_node);
}
}
child = new_node;
}
device_set_desc(dev, "OpenFirmware Nexus device");
return (0);
}
static void
nexus_probe_nomatch(device_t dev, device_t child)
{
char *name, *type;
if (BUS_READ_IVAR(dev, child, NEXUS_IVAR_NAME,
(uintptr_t *)&name) != 0 ||
BUS_READ_IVAR(dev, child, NEXUS_IVAR_DEVICE_TYPE,
(uintptr_t *)&type) != 0)
return;
if (type == NULL)
type = "(unknown)";
#if 0
device_printf(dev, "<%s>, type %s (no driver attached)\n",
name, type);
#endif
}
static int
nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct nexus_devinfo *dinfo;
if ((dinfo = device_get_ivars(child)) == 0)
return (ENOENT);
switch (which) {
case NEXUS_IVAR_NODE:
*result = dinfo->ndi_node;
break;
case NEXUS_IVAR_NAME:
*result = (uintptr_t)dinfo->ndi_name;
break;
case NEXUS_IVAR_DEVICE_TYPE:
*result = (uintptr_t)dinfo->ndi_device_type;
break;
default:
return (ENOENT);
}
return 0;
}
static int
nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
struct nexus_devinfo *dinfo;
if ((dinfo = device_get_ivars(child)) == 0)
return (ENOENT);
switch (which) {
case NEXUS_IVAR_NODE:
case NEXUS_IVAR_NAME:
case NEXUS_IVAR_DEVICE_TYPE:
return (EINVAL);
default:
return (ENOENT);
}
return 0;
}
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