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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208  /* * erase, protect, unprotect - FLASH support * * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ /** * @file * @brief Flash memory support: erase, protect, unprotect */ #include #include #include #include #include #include #include static int do_flerase(int argc, char *argv[]) { int fd; char *filename = NULL; struct stat s; unsigned long start = 0, size = ~0; int ret = 0; if (argc == 1) return COMMAND_ERROR_USAGE; filename = argv[1]; if (stat(filename, &s)) { printf("stat %s: %s\n", filename, errno_str()); return 1; } size = s.st_size; fd = open(filename, O_WRONLY); if (fd < 0) { printf("open %s: %s", filename, errno_str()); return 1; } if (argc == 3 && parse_area_spec(argv[2], &start, &size)) { printf("could not parse: %s\n", argv[optind]); ret = 1; goto out; } if (erase(fd, size, start)) { perror("erase"); ret = 1; } out: close(fd); return ret; } BAREBOX_CMD_HELP_START(erase) BAREBOX_CMD_HELP_USAGE("erase [area]\n") BAREBOX_CMD_HELP_SHORT("Erase a flash device or parts of a device if an area specification is given.\n") BAREBOX_CMD_HELP_END BAREBOX_CMD_START(erase) .cmd = do_flerase, .usage = "erase FLASH memory", BAREBOX_CMD_HELP(cmd_erase_help) BAREBOX_CMD_END /** * @page erase_command

Erase the flash memory handled by this device. Which area will be erased depends on the device: If the device represents the whole flash memory, the whole memory will be erased. If the device represents a partition on a main flash memory, only this partition part will be erased.

Refer to \ref addpart_command, \ref delpart_command and \ref devinfo_command for partition handling. */ static int do_protect(int argc, char *argv[]) { int fd; char *filename = NULL; struct stat s; int prot = 1; unsigned long start = 0, size = ~0; int ret = 0, err; if (argc == 1) return COMMAND_ERROR_USAGE; filename = argv[1]; if (*argv[0] == 'u') prot = 0; if (stat(filename, &s)) { printf("stat %s: %s\n", filename, errno_str()); return 1; } size = s.st_size; fd = open(filename, O_WRONLY); if (fd < 0) { printf("open %s: %s", filename, errno_str()); return 1; } if (argc == 3) if (parse_area_spec(argv[2], &start, &size)) { printf("could not parse: %s\n", argv[optind]); ret = 1; goto out; } err = protect(fd, size, start, prot); if (err && err != -ENOSYS) { perror("protect"); ret = 1; goto out; } out: close(fd); return ret; } BAREBOX_CMD_HELP_START(protect) BAREBOX_CMD_HELP_USAGE("protect [area]\n") BAREBOX_CMD_HELP_SHORT("protect a flash device (or parts of a device, if an area is specified)\n") BAREBOX_CMD_HELP_END BAREBOX_CMD_START(protect) .cmd = do_protect, .usage = "enable flash write protection", BAREBOX_CMD_HELP(cmd_protect_help) BAREBOX_CMD_END /** * @page protect_command Protect the flash memory behind the device. It depends on the device given, what area will be protected. If the device represents the whole flash memory the whole memory will be protected. If the device represents a partition on a main flash memory, only this partition part will be protected. Refer addpart_command, delpart_command and devinfo_command for partition handling. \todo Rework this documentation, what is an 'area'? Explain more about flashes here. */ BAREBOX_CMD_HELP_START(unprotect) BAREBOX_CMD_HELP_USAGE("unprotect [area]\n") BAREBOX_CMD_HELP_SHORT("unprotect a flash device (or parts of a device, if an area is specified)\n") BAREBOX_CMD_HELP_END BAREBOX_CMD_START(unprotect) .cmd = do_protect, .usage = "disable flash write protection", BAREBOX_CMD_HELP(cmd_unprotect_help) BAREBOX_CMD_END /** * @page unprotect_command Unprotect the flash memory behind the device. It depends on the device given, what area will be unprotected. If the device represents the whole flash memory the whole memory will be unprotected. If the device represents a partition on a main flash memory, only this partition part will be unprotected. Refer addpart_command, delpart_command and devinfo_command for partition handling. \todo Rework this documentation, what does it mean? */