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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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stand.h>
#include "bootstrap.h"
#include "libofw.h"
static int ofw_parsedev(struct ofw_devdesc **, const char *, const char **);
/*
* 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 ofw_devdesc **dev = (struct ofw_devdesc **)vdev;
int rv;
/*
* If it looks like this is just a path and no
* device, go with the current device.
*/
if ((devspec == NULL) ||
((strchr(devspec, '@') == NULL) &&
(strchr(devspec, ':') == NULL))) {
if (((rv = ofw_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
(path != NULL))
*path = devspec;
return(rv);
}
/*
* Try to parse the device name off the beginning of the devspec
*/
return(ofw_parsedev(dev, devspec, path));
}
/*
* Point (dev) at an allocated device specifier matching the string version
* at the beginning of (devspec). Return a pointer to the remaining
* text in (path).
*/
static int
ofw_parsedev(struct ofw_devdesc **dev, const char *devspec, const char **path)
{
struct ofw_devdesc *idev;
struct devsw *dv;
phandle_t handle;
const char *p;
const char *s;
char *ep;
char name[256];
char type[64];
int len;
int i;
for (p = s = devspec; *s != '\0'; p = s) {
if ((s = strchr(p + 1, '/')) == NULL)
s = strchr(p, '\0');
len = s - devspec;
bcopy(devspec, name, len);
name[len] = '\0';
if ((handle = OF_finddevice(name)) == -1) {
bcopy(name, type, len);
type[len] = '\0';
} else if (OF_getprop(handle, "device_type", type, sizeof(type)) == -1)
continue;
for (i = 0; (dv = devsw[i]) != NULL; i++) {
if (strncmp(dv->dv_name, type, strlen(dv->dv_name)) == 0)
goto found;
}
}
return(ENOENT);
found:
if (path != NULL && *s != '\0')
*path = s;
idev = malloc(sizeof(struct ofw_devdesc));
if (idev == NULL) {
printf("ofw_parsedev: malloc failed\n");
return ENOMEM;
}
strcpy(idev->d_path, name);
idev->d_dev = dv;
idev->d_type = dv->dv_type;
if (idev->d_type == DEVT_ZFS) {
idev->d_unit = 0;
p = name + strlen(dv->dv_name);
if (*p && (*p != ':')) {
idev->d_unit = strtol(p, &ep, 0);
if (ep == p) {
free(idev);
return (EUNIT);
}
}
}
if (dev == NULL) {
free(idev);
} else {
*dev = idev;
}
return(0);
}
int
ofw_setcurrdev(struct env_var *ev, int flags, const void *value)
{
struct ofw_devdesc *ncurr;
int rv;
if ((rv = ofw_parsedev(&ncurr, value, NULL)) != 0)
return rv;
free(ncurr);
env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
return 0;
}
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