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/*-
* Copyright (c) 1998 Michael Smith <msmith@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.
*/
#include <stand.h>
#include "bootstrap.h"
#include "libofw.h"
/*
* Point (dev) at an allocated device specifier for the device matching the
* path in (devspec). If it contains an explicit device specification,
* use that. If not, use the default device.
*/
int
ofw_getdev(void **vdev, const char *devspec, const char **path)
{
struct devdesc **dev = (struct devdesc **)vdev;
int rv;
/*
* If it looks like this is just a path and no device, go with the
* current device.
*/
if (devspec == NULL || strpbrk(devspec, ":@") == NULL) {
rv = devparse(dev, getenv("currdev"), NULL);
if (rv == 0 && path != NULL)
*path = devspec;
return (rv);
}
/*
* Try to parse the device name off the beginning of the devspec
*/
return (devparse(dev, devspec, path));
}
/*
* Search the OFW (path) for a node that's of (want_type).
*/
phandle_t
ofw_path_to_handle(const char *ofwpath, const char *want_type, const char **path)
{
const char *p, *s;
char name[256];
char type[64];
phandle_t handle;
int len;
for (p = s = ofwpath; *s != '\0'; p = s) {
if ((s = strchr(p + 1, '/')) == NULL)
s = strchr(p, '\0');
len = s - ofwpath;
if (len >= sizeof(name))
return ((phandle_t)-1);
bcopy(ofwpath, name, len);
name[len] = '\0';
if ((handle = OF_finddevice(name)) == -1)
continue;
if (OF_getprop(handle, "device_type", type, sizeof(type)) == -1)
continue;
if (strcmp(want_type, type) == 0) {
*path = s;
return (handle);
}
}
return ((phandle_t)-1);
}
int
ofw_common_parsedev(struct devdesc **dev, const char *devspec, const char **path,
const char *ofwtype)
{
const char *rem_path;
struct ofw_devdesc *idev;
if (ofw_path_to_handle(devspec, ofwtype, &rem_path) == -1)
return (ENOENT);
idev = malloc(sizeof(struct ofw_devdesc));
if (idev == NULL) {
printf("ofw_parsedev: malloc failed\n");
return ENOMEM;
};
strlcpy(idev->d_path, devspec, min(rem_path - devspec + 1,
sizeof(idev->d_path)));
*dev = &idev->dd;
if (path != NULL)
*path = rem_path;
return 0;
}
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