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 <err.h> 42 #include <getopt.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 const char *progname; 49 const char *dvname; 50 51 static void 52 usage(void) 53 { 54 fprintf(stderr, "usage: %s [-f device] op...\n", progname); 55 fprintf(stderr, "where op's are:\n"); 56 fprintf(stderr, "fact\t\tread factory PR segment\n"); 57 fprintf(stderr, "oem\t\tread OEM segment\n"); 58 fprintf(stderr, "woem value\twrite OEM segment\n"); 59 fprintf(stderr, "plr\t\tread PLR\n"); 60 fprintf(stderr, "wplr\t\twrite PLR\n"); 61 exit(-1); 62 } 63 64 static int 65 getfd(int mode) 66 { 67 int fd = open(dvname, mode, 0); 68 if (fd < 0) 69 err(-1, "open"); 70 return fd; 71 } 72 73 static uint64_t 74 getfactorypr(void) 75 { 76 uint64_t v; 77 int fd = getfd(O_RDONLY); 78 if (ioctl(fd, CFIOCGFACTORYPR, &v) < 0) 79 err(-1, "ioctl(CFIOCGFACTORYPR)"); 80 close(fd); 81 return v; 82 } 83 84 static uint64_t 85 getoempr(void) 86 { 87 uint64_t v; 88 int fd = getfd(O_RDONLY); 89 if (ioctl(fd, CFIOCGOEMPR, &v) < 0) 90 err(-1, "ioctl(CFIOCGOEMPR)"); 91 close(fd); 92 return v; 93 } 94 95 static void 96 setoempr(uint64_t v) 97 { 98 int fd = getfd(O_WRONLY); 99 if (ioctl(fd, CFIOCSOEMPR, &v) < 0) 100 err(-1, "ioctl(CFIOCGOEMPR)"); 101 close(fd); 102 } 103 104 static uint32_t 105 getplr(void) 106 { 107 uint32_t plr; 108 int fd = getfd(O_RDONLY); 109 if (ioctl(fd, CFIOCGPLR, &plr) < 0) 110 err(-1, "ioctl(CFIOCGPLR)"); 111 close(fd); 112 return plr; 113 } 114 115 static void 116 setplr(void) 117 { 118 int fd = getfd(O_WRONLY); 119 if (ioctl(fd, CFIOCSPLR, 0) < 0) 120 err(-1, "ioctl(CFIOCPLR)"); 121 close(fd); 122 } 123 124 int 125 main(int argc, char *argv[]) 126 { 127 dvname = getenv("CFI"); 128 if (dvname == NULL) 129 dvname = "/dev/cfi0"; 130 progname = argv[0]; 131 if (argc > 1) { 132 if (strcmp(argv[1], "-f") == 0) { 133 if (argc < 2) 134 errx(1, "missing device name for -f option"); 135 dvname = argv[2]; 136 argc -= 2, argv += 2; 137 } else if (strcmp(argv[1], "-?") == 0) 138 usage(); 139 } 140 for (; argc > 1; argc--, argv++) { 141 if (strcasecmp(argv[1], "fact") == 0) { 142 printf("0x%llx\n", (unsigned long long) getfactorypr()); 143 } else if (strcasecmp(argv[1], "oem") == 0) { 144 printf("0x%llx\n", (unsigned long long) getoempr()); 145 } else if (strcasecmp(argv[1], "woem") == 0) { 146 if (argc < 2) 147 errx(1, "missing value for woem"); 148 setoempr((uint64_t) strtoull(argv[2], NULL, 0)); 149 argc--, argv++; 150 } else if (strcasecmp(argv[1], "plr") == 0) { 151 printf("0x%x\n", getplr()); 152 } else if (strcasecmp(argv[1], "wplr") == 0) { 153 setplr(); 154 } else 155 usage(); 156 } 157 } 158