xref: /freebsd/tools/tools/cfi/cfi.c (revision 39beb93c)
1 /*-
2  * Copyright (c) 2009 Sam Leffler, Errno Consulting
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  *    without modification.
11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13  *    redistribution must be conditioned upon including a substantially
14  *    similar Disclaimer requirement for further binary redistribution.
15  *
16  * NO WARRANTY
17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27  * THE POSSIBILITY OF SUCH DAMAGES.
28  *
29  * $FreeBSD$
30  */
31 
32 /*
33  * cfi [-f device] op
34  * (default device is /dev/cfi0).
35  */
36 #include <sys/types.h>
37 #include <sys/file.h>
38 #include <sys/ioctl.h>
39 #include <sys/cfictl.h>
40 
41 #include <stdio.h>
42 #include <getopt.h>
43 #include <stdlib.h>
44 
45 const char *progname;
46 const char *dvname;
47 
48 static void
49 usage(void)
50 {
51 	int i;
52 
53 	fprintf(stderr, "usage: %s [-f device] op...\n", progname);
54 	fprintf(stderr, "where op's are:\n");
55 	fprintf(stderr, "fact\t\tread factory PR segment\n");
56 	fprintf(stderr, "oem\t\tread OEM segment\n");
57 	fprintf(stderr, "woem value\twrite OEM segment\n");
58 	fprintf(stderr, "plr\t\tread PLR\n");
59 	fprintf(stderr, "wplr\t\twrite PLR\n");
60 	exit(-1);
61 }
62 
63 static int
64 getfd(int mode)
65 {
66 	int fd = open(dvname, mode, 0);
67 	if (fd < 0)
68 		err(-1, "open");
69 	return fd;
70 }
71 
72 static uint64_t
73 getfactorypr(void)
74 {
75 	uint64_t v;
76 	int fd = getfd(O_RDONLY);
77 	if (ioctl(fd, CFIOCGFACTORYPR, &v) < 0)
78 		err(-1, "ioctl(CFIOCGFACTORYPR)");
79 	close(fd);
80 	return v;
81 }
82 
83 static uint64_t
84 getoempr(void)
85 {
86 	uint64_t v;
87 	int fd = getfd(O_RDONLY);
88 	if (ioctl(fd, CFIOCGOEMPR, &v) < 0)
89 		err(-1, "ioctl(CFIOCGOEMPR)");
90 	close(fd);
91 	return v;
92 }
93 
94 static void
95 setoempr(uint64_t v)
96 {
97 	int fd = getfd(O_WRONLY);
98 	if (ioctl(fd, CFIOCSOEMPR, &v) < 0)
99 		err(-1, "ioctl(CFIOCGOEMPR)");
100 	close(fd);
101 }
102 
103 static uint32_t
104 getplr(void)
105 {
106 	uint32_t plr;
107 	int fd = getfd(O_RDONLY);
108 	if (ioctl(fd, CFIOCGPLR, &plr) < 0)
109 		err(-1, "ioctl(CFIOCGPLR)");
110 	close(fd);
111 	return plr;
112 }
113 
114 static void
115 setplr(void)
116 {
117 	int fd = getfd(O_WRONLY);
118 	if (ioctl(fd, CFIOCSPLR, 0) < 0)
119 		err(-1, "ioctl(CFIOCPLR)");
120 	close(fd);
121 }
122 
123 int
124 main(int argc, char *argv[])
125 {
126 	dvname = getenv("CFI");
127 	if (dvname == NULL)
128 		dvname = "/dev/cfi0";
129 	progname = argv[0];
130 	if (argc > 1) {
131 		if (strcmp(argv[1], "-f") == 0) {
132 			if (argc < 2)
133 				errx(1, "missing device name for -f option");
134 			dvname = argv[2];
135 			argc -= 2, argv += 2;
136 		} else if (strcmp(argv[1], "-?") == 0)
137 			usage();
138 	}
139 	for (; argc > 1; argc--, argv++) {
140 		if (strcasecmp(argv[1], "fact") == 0) {
141 			printf("0x%llx\n", (unsigned long long) getfactorypr());
142 		} else if (strcasecmp(argv[1], "oem") == 0) {
143 			printf("0x%llx\n", (unsigned long long) getoempr());
144 		} else if (strcasecmp(argv[1], "woem") == 0) {
145 			if (argc < 2)
146 				errx(1, "missing value for woem");
147 			setoempr((uint64_t) strtoull(argv[2], NULL, 0));
148 			argc--, argv++;
149 		} else if (strcasecmp(argv[1], "plr") == 0) {
150 			printf("0x%x\n", getplr());
151 		} else if (strcasecmp(argv[1], "wplr") == 0) {
152 			setplr();
153 		} else
154 			usage();
155 	}
156 }
157