devicename.c revision 123703
138465Smsmith/*- 238465Smsmith * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 338465Smsmith * All rights reserved. 438465Smsmith * 538465Smsmith * Redistribution and use in source and binary forms, with or without 638465Smsmith * modification, are permitted provided that the following conditions 738465Smsmith * are met: 838465Smsmith * 1. Redistributions of source code must retain the above copyright 938465Smsmith * notice, this list of conditions and the following disclaimer. 1038465Smsmith * 2. Redistributions in binary form must reproduce the above copyright 1138465Smsmith * notice, this list of conditions and the following disclaimer in the 1238465Smsmith * documentation and/or other materials provided with the distribution. 1338465Smsmith * 1438465Smsmith * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1538465Smsmith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1638465Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1738465Smsmith * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1838465Smsmith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1938465Smsmith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2038465Smsmith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2138465Smsmith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2238465Smsmith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2338465Smsmith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2438465Smsmith * SUCH DAMAGE. 2538465Smsmith * 2650477Speter * $FreeBSD: head/sys/boot/ofw/libofw/devicename.c 123703 2003-12-21 12:38:25Z grehan $ 2738465Smsmith */ 2838465Smsmith 2938465Smsmith#include <stand.h> 3067227Sobrien#include "libofw.h" 3138465Smsmith 32106738Sjakestatic int ofw_parsedev(struct ofw_devdesc **, const char *, const char **); 3338465Smsmith 3438465Smsmith/* 3538465Smsmith * Point (dev) at an allocated device specifier for the device matching the 3638465Smsmith * path in (devspec). If it contains an explicit device specification, 3738465Smsmith * use that. If not, use the default device. 3838465Smsmith */ 3938465Smsmithint 4067227Sobrienofw_getdev(void **vdev, const char *devspec, const char **path) 4138465Smsmith{ 4267227Sobrien struct ofw_devdesc **dev = (struct ofw_devdesc **)vdev; 4338465Smsmith int rv; 44106738Sjake 4538465Smsmith /* 4638465Smsmith * If it looks like this is just a path and no 4738465Smsmith * device, go with the current device. 4838465Smsmith */ 4938465Smsmith if ((devspec == NULL) || 50123703Sgrehan ((strchr(devspec, '@') == NULL) && 51123703Sgrehan (strchr(devspec, ':') == NULL))) { 5238465Smsmith 5367227Sobrien if (((rv = ofw_parsedev(dev, getenv("currdev"), NULL)) == 0) && 5438465Smsmith (path != NULL)) 5538465Smsmith *path = devspec; 5638465Smsmith return(rv); 5738465Smsmith } 5838465Smsmith 5938465Smsmith /* 6038465Smsmith * Try to parse the device name off the beginning of the devspec 6138465Smsmith */ 6267227Sobrien return(ofw_parsedev(dev, devspec, path)); 6338465Smsmith} 6438465Smsmith 6538465Smsmith/* 6638465Smsmith * Point (dev) at an allocated device specifier matching the string version 6738465Smsmith * at the beginning of (devspec). Return a pointer to the remaining 6838465Smsmith * text in (path). 6938465Smsmith */ 7038465Smsmithstatic int 7167227Sobrienofw_parsedev(struct ofw_devdesc **dev, const char *devspec, const char **path) 7238465Smsmith{ 73106738Sjake struct ofw_devdesc *idev; 7438465Smsmith struct devsw *dv; 75106738Sjake phandle_t handle; 76106738Sjake const char *p; 77106738Sjake const char *s; 78106738Sjake char name[256]; 79106738Sjake char type[64]; 80106738Sjake int len; 81106738Sjake int i; 8238465Smsmith 83106738Sjake for (p = s = devspec; *s != '\0'; p = s) { 84106738Sjake if ((s = strchr(p + 1, '/')) == NULL) 85106738Sjake s = strchr(p, '\0'); 86106738Sjake len = s - devspec; 87106738Sjake bcopy(devspec, name, len); 88106738Sjake name[len] = '\0'; 89106738Sjake if ((handle = OF_finddevice(name)) == -1) 9038465Smsmith break; 91106738Sjake if (OF_getprop(handle, "device_type", type, sizeof(type)) == -1) 92106738Sjake continue; 93106738Sjake for (i = 0; (dv = devsw[i]) != NULL; i++) { 94107483Sjake if (strncmp(dv->dv_name, type, strlen(dv->dv_name)) == 0) 95106738Sjake goto found; 9638465Smsmith } 9738465Smsmith } 98106738Sjake return(ENOENT); 9938465Smsmith 100106738Sjakefound: 101106738Sjake if (*s != '\0') 102106738Sjake *path = s; 10367227Sobrien idev = malloc(sizeof(struct ofw_devdesc)); 104106738Sjake strcpy(idev->d_path, name); 10538465Smsmith idev->d_dev = dv; 10638465Smsmith idev->d_type = dv->dv_type; 10738475Sdfr if (dev == NULL) { 10838475Sdfr free(idev); 10938475Sdfr } else { 11038465Smsmith *dev = idev; 11138475Sdfr } 11238465Smsmith return(0); 11338465Smsmith} 11468548Sbenno 11584968Srobertint 116123703Sgrehanofw_setcurrdev(struct env_var *ev, int flags, const void *value) 11768548Sbenno{ 118106738Sjake struct ofw_devdesc *ncurr; 119106738Sjake int rv; 12068548Sbenno 121106738Sjake if ((rv = ofw_parsedev(&ncurr, value, NULL)) != 0) 122106738Sjake return rv; 12368548Sbenno 124106738Sjake free(ncurr); 125106738Sjake env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); 126106738Sjake return 0; 12768548Sbenno} 128