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/*
* Copyright (C) 2000 Benno Rice
* 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 Benno Rice ``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 TOOLS GMBH 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.
*
* $FreeBSD$
*/
#include <stand.h>
#include "libofw.h"
#include "openfirm.h"
static phandle_t curnode;
/*
* Initialise a device tree search. We do this by setting curpackage to point
* to the root node.
*/
void
ofw_devsearch_init(void)
{
curnode = OF_peer(0);
}
static phandle_t
nextnode(phandle_t current)
{
phandle_t node;
node = OF_child(current);
if (node == -1)
return(-1);
if (node == 0) {
node = OF_peer(current);
if (node == -1)
return(-1);
if (node == 0) {
phandle_t newnode;
newnode = current;
node = 0;
while (node == 0) {
node = OF_parent(newnode);
if (node == -1 || node == 0)
return ((int)node);
newnode = node;
node = OF_peer(newnode);
}
}
}
return(node);
}
/*
* Search for devices in the device tree with a certain device_type.
* Return their paths.
*/
int
ofw_devsearch(const char *type, char *path)
{
phandle_t new;
char str[32];
int i;
for (;;) {
new = nextnode(curnode);
if (new == 0 || new == -1) {
return((int)new);
}
curnode = new;
if ((i = OF_getprop(curnode, "device_type", str, 31)) != -1) {
if (strncmp(str, type, 32) == 0) {
if ((i = OF_package_to_path(curnode, path, 254)) == -1)
return(-1);
path[i] = '\0';
return(1);
}
}
}
}
/*
* Get the device_type of a node.
* Return DEVT_DISK, DEVT_NET or DEVT_NONE.
*/
int
ofw_devicetype(char *path)
{
phandle_t node;
char type[16];
node = OF_finddevice(path);
if (node == -1)
return DEVT_NONE;
OF_getprop(node, "device_type", type, 16);
if (strncmp(type, "block", 16) == 0)
return DEVT_DISK;
else if (strncmp(type, "network", 16) == 0)
return DEVT_NET;
else
return DEVT_NONE;
}
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