1 /*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <stand.h> 28 29 #include "bootstrap.h" 30 #include "libofw.h" 31 32 /* 33 * Point (dev) at an allocated device specifier for the device matching the 34 * path in (devspec). If it contains an explicit device specification, 35 * use that. If not, use the default device. 36 */ 37 int 38 ofw_getdev(void **vdev, const char *devspec, const char **path) 39 { 40 struct devdesc **dev = (struct devdesc **)vdev; 41 int rv; 42 43 /* 44 * If it looks like this is just a path and no device, go with the 45 * current device. 46 */ 47 if (devspec == NULL || strpbrk(devspec, ":@") == NULL) { 48 rv = devparse(dev, getenv("currdev"), NULL); 49 if (rv == 0 && path != NULL) 50 *path = devspec; 51 return (rv); 52 } 53 54 /* 55 * Try to parse the device name off the beginning of the devspec 56 */ 57 return (devparse(dev, devspec, path)); 58 } 59 60 /* 61 * Search the OFW (path) for a node that's of (want_type). 62 */ 63 phandle_t 64 ofw_path_to_handle(const char *ofwpath, const char *want_type, const char **path) 65 { 66 const char *p, *s; 67 char name[256]; 68 char type[64]; 69 phandle_t handle; 70 int len; 71 72 for (p = s = ofwpath; *s != '\0'; p = s) { 73 if ((s = strchr(p + 1, '/')) == NULL) 74 s = strchr(p, '\0'); 75 len = s - ofwpath; 76 if (len >= sizeof(name)) 77 return ((phandle_t)-1); 78 bcopy(ofwpath, name, len); 79 name[len] = '\0'; 80 if ((handle = OF_finddevice(name)) == -1) 81 continue; 82 if (OF_getprop(handle, "device_type", type, sizeof(type)) == -1) 83 continue; 84 if (strcmp(want_type, type) == 0) { 85 *path = s; 86 return (handle); 87 } 88 } 89 return ((phandle_t)-1); 90 } 91 92 int 93 ofw_common_parsedev(struct devdesc **dev, const char *devspec, const char **path, 94 const char *ofwtype) 95 { 96 const char *rem_path; 97 struct ofw_devdesc *idev; 98 99 if (ofw_path_to_handle(devspec, ofwtype, &rem_path) == -1) 100 return (ENOENT); 101 idev = malloc(sizeof(struct ofw_devdesc)); 102 if (idev == NULL) { 103 printf("ofw_parsedev: malloc failed\n"); 104 return ENOMEM; 105 }; 106 strlcpy(idev->d_path, devspec, min(rem_path - devspec + 1, 107 sizeof(idev->d_path))); 108 *dev = &idev->dd; 109 if (path != NULL) 110 *path = rem_path; 111 return 0; 112 } 113