1 /* 2 * Copyright 2006 Freescale Semiconductor 3 * York Sun (yorksun@freescale.com) 4 * Haiying Wang (haiying.wang@freescale.com) 5 * 6 * See file CREDITS for list of people who contributed to this 7 * project. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation; either version 2 of 12 * the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 22 * MA 02111-1307 USA 23 */ 24 25 #include <common.h> 26 #include <command.h> 27 #include <i2c.h> 28 #include <linux/ctype.h> 29 30 typedef struct { 31 u8 id[4]; /* 0x0000 - 0x0003 EEPROM Tag */ 32 u8 sn[12]; /* 0x0004 - 0x000F Serial Number */ 33 u8 errata[5]; /* 0x0010 - 0x0014 Errata Level */ 34 u8 date[6]; /* 0x0015 - 0x001a Build Date */ 35 u8 res_0; /* 0x001b Reserved */ 36 u8 version[4]; /* 0x001c - 0x001f Version */ 37 u8 tempcal[8]; /* 0x0020 - 0x0027 Temperature Calibration Factors*/ 38 u8 tempcalsys[2]; /* 0x0028 - 0x0029 System Temperature Calibration Factors*/ 39 u8 res_1[22]; /* 0x0020 - 0x003f Reserved */ 40 u8 mac_size; /* 0x0040 Mac table size */ 41 u8 mac_flag; /* 0x0041 Mac table flags */ 42 u8 mac[8][6]; /* 0x0042 - 0x0071 Mac addresses */ 43 u32 crc; /* 0x0072 crc32 checksum */ 44 } EEPROM_data; 45 46 static EEPROM_data mac_data; 47 48 int mac_show(void) 49 { 50 int i; 51 u8 mac_size; 52 unsigned char ethaddr[8][18]; 53 unsigned char enetvar[32]; 54 55 /* Show EEPROM tagID, 56 * always the four characters 'NXID'. 57 */ 58 printf("ID "); 59 for (i = 0; i < 4; i++) 60 printf("%c", mac_data.id[i]); 61 printf("\n"); 62 63 /* Show Serial number, 64 * 0 to 11 charaters of errata information. 65 */ 66 printf("SN "); 67 for (i = 0; i < 12; i++) 68 printf("%c", mac_data.sn[i]); 69 printf("\n"); 70 71 /* Show Errata Level, 72 * 0 to 4 characters of errata information. 73 */ 74 printf("Errata "); 75 for (i = 0; i < 5; i++) 76 printf("%c", mac_data.errata[i]); 77 printf("\n"); 78 79 /* Show Build Date, 80 * BCD date values, as YYMMDDhhmmss. 81 */ 82 printf("Date 20%02x/%02x/%02x %02x:%02x:%02x\n", 83 mac_data.date[0], 84 mac_data.date[1], 85 mac_data.date[2], 86 mac_data.date[3], 87 mac_data.date[4], 88 mac_data.date[5]); 89 90 /* Show MAC table size, 91 * Value from 0 to 7 indicating how many MAC 92 * addresses are stored in the system EEPROM. 93 */ 94 if((mac_data.mac_size > 0) && (mac_data.mac_size <= 8)) 95 mac_size = mac_data.mac_size; 96 else 97 mac_size = 8; /* Set the max size */ 98 printf("MACSIZE %x\n", mac_size); 99 100 /* Show Mac addresses */ 101 for (i = 0; i < mac_size; i++) { 102 sprintf((char *)ethaddr[i], 103 "%02x:%02x:%02x:%02x:%02x:%02x", 104 mac_data.mac[i][0], 105 mac_data.mac[i][1], 106 mac_data.mac[i][2], 107 mac_data.mac[i][3], 108 mac_data.mac[i][4], 109 mac_data.mac[i][5]); 110 printf("MAC %d %s\n", i, ethaddr[i]); 111 112 sprintf((char *)enetvar, 113 i ? "eth%daddr" : "ethaddr", i); 114 setenv((char *)enetvar, (char *)ethaddr[i]); 115 116 } 117 118 return 0; 119 } 120 121 int mac_read(void) 122 { 123 int ret, length; 124 unsigned int crc = 0; 125 unsigned char dev = ID_EEPROM_ADDR, *data; 126 127 length = sizeof(EEPROM_data); 128 ret = i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length); 129 if (ret) { 130 printf("Read failed.\n"); 131 return -1; 132 } 133 134 data = (unsigned char *)(&mac_data); 135 printf("Check CRC on reading ..."); 136 crc = crc32(crc, data, length - 4); 137 if (crc != mac_data.crc) { 138 printf("CRC checksum is invalid, in EEPROM CRC is %x, calculated CRC is %x\n", 139 mac_data.crc, crc); 140 return -1; 141 } else { 142 printf("CRC OK\n"); 143 mac_show(); 144 } 145 return 0; 146 } 147 148 int mac_prog(void) 149 { 150 int ret, i, length; 151 unsigned int crc = 0; 152 unsigned char dev = ID_EEPROM_ADDR, *ptr; 153 unsigned char *eeprom_data = (unsigned char *)(&mac_data); 154 155 mac_data.res_0 = 0; 156 memset((void *)mac_data.res_1, 0, sizeof(mac_data.res_1)); 157 158 length = sizeof(EEPROM_data); 159 crc = crc32(crc, eeprom_data, length - 4); 160 mac_data.crc = crc; 161 for (i = 0, ptr = eeprom_data; i < length; i += 8, ptr += 8) { 162 ret = i2c_write(dev, i, 1, ptr, min((length - i),8)); 163 udelay(5000); /* 5ms write cycle timing */ 164 if (ret) 165 break; 166 } 167 if (ret) { 168 printf("Programming failed.\n"); 169 return -1; 170 } else { 171 printf("Programming %d bytes. Reading back ...\n", length); 172 mac_read(); 173 } 174 return 0; 175 } 176 177 int do_mac(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) 178 { 179 int i; 180 char cmd = 's'; 181 unsigned long long mac_val; 182 183 if (i2c_probe(ID_EEPROM_ADDR) != 0) 184 return -1; 185 186 if (argc > 1) { 187 cmd = argv[1][0]; 188 switch (cmd) { 189 case 'r': /* display */ 190 mac_read(); 191 break; 192 case 's': /* save */ 193 mac_prog(); 194 break; 195 case 'i': /* id */ 196 for (i = 0; i < 4; i++) { 197 mac_data.id[i] = argv[2][i]; 198 } 199 break; 200 case 'n': /* serial number */ 201 for (i = 0; i < 12; i++) { 202 mac_data.sn[i] = argv[2][i]; 203 } 204 break; 205 case 'e': /* errata */ 206 for (i = 0; i < 5; i++) { 207 mac_data.errata[i] = argv[2][i]; 208 } 209 break; 210 case 'd': /* date */ 211 mac_val = simple_strtoull(argv[2], NULL, 16); 212 for (i = 0; i < 6; i++) { 213 mac_data.date[i] = (mac_val >> (40 - 8 * i)); 214 } 215 break; 216 case 'p': /* mac table size */ 217 mac_data.mac_size = 218 (unsigned char)simple_strtoul(argv[2], NULL, 16); 219 break; 220 case '0': /* mac 0 */ 221 case '1': /* mac 1 */ 222 case '2': /* mac 2 */ 223 case '3': /* mac 3 */ 224 case '4': /* mac 4 */ 225 case '5': /* mac 5 */ 226 case '6': /* mac 6 */ 227 case '7': /* mac 7 */ 228 mac_val = simple_strtoull(argv[2], NULL, 16); 229 for (i = 0; i < 6; i++) { 230 mac_data.mac[cmd - '0'][i] = 231 *((unsigned char *) 232 (((unsigned int)(&mac_val)) + i + 2)); 233 } 234 break; 235 case 'h': /* help */ 236 default: 237 printf("Usage:\n%s\n", cmdtp->usage); 238 break; 239 } 240 } else { 241 mac_show(); 242 } 243 return 0; 244 } 245 246 int mac_read_from_eeprom(void) 247 { 248 int length, i; 249 unsigned char dev = ID_EEPROM_ADDR; 250 unsigned char *data; 251 unsigned char ethaddr[4][18]; 252 unsigned char enetvar[32]; 253 unsigned int crc = 0; 254 255 length = sizeof(EEPROM_data); 256 if (i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length)) { 257 printf("Read failed.\n"); 258 return -1; 259 } 260 261 data = (unsigned char *)(&mac_data); 262 crc = crc32(crc, data, length - 4); 263 if (crc != mac_data.crc) { 264 return -1; 265 } else { 266 for (i = 0; i < 4; i++) { 267 if (memcmp(&mac_data.mac[i], "\0\0\0\0\0\0", 6)) { 268 sprintf((char *)ethaddr[i], 269 "%02x:%02x:%02x:%02x:%02x:%02x", 270 mac_data.mac[i][0], 271 mac_data.mac[i][1], 272 mac_data.mac[i][2], 273 mac_data.mac[i][3], 274 mac_data.mac[i][4], 275 mac_data.mac[i][5]); 276 sprintf((char *)enetvar, 277 i ? "eth%daddr" : "ethaddr", 278 i); 279 setenv((char *)enetvar, (char *)ethaddr[i]); 280 } 281 } 282 } 283 return 0; 284 } 285