X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=board%2Ffreescale%2Fcommon%2Fsys_eeprom.c;h=d2ed0361e246f05041e92d890675436135c0c016;hb=9614a1e9636976add95730c2da569ac1b274f232;hp=c8e17d0dd0fdc67a6fc8f0c83035beb4490a7bdf;hpb=9e04a8138892d64848dc6e8e74213086d9190d9a;p=u-boot diff --git a/board/freescale/common/sys_eeprom.c b/board/freescale/common/sys_eeprom.c index c8e17d0dd0..d2ed0361e2 100644 --- a/board/freescale/common/sys_eeprom.c +++ b/board/freescale/common/sys_eeprom.c @@ -1,7 +1,8 @@ /* - * Copyright 2006 Freescale Semiconductor + * Copyright 2006, 2008-2009, 2011 Freescale Semiconductor * York Sun (yorksun@freescale.com) * Haiying Wang (haiying.wang@freescale.com) + * Timur Tabi (timur@freescale.com) * * See file CREDITS for list of people who contributed to this * project. @@ -27,258 +28,527 @@ #include #include -typedef struct { - u8 id[4]; /* 0x0000 - 0x0003 EEPROM Tag */ - u8 sn[12]; /* 0x0004 - 0x000F Serial Number */ - u8 errata[5]; /* 0x0010 - 0x0014 Errata Level */ - u8 date[6]; /* 0x0015 - 0x001a Build Date */ - u8 res_0; /* 0x001b Reserved */ - u8 version[4]; /* 0x001c - 0x001f Version */ - u8 tempcal[8]; /* 0x0020 - 0x0027 Temperature Calibration Factors*/ - u8 tempcalsys[2]; /* 0x0028 - 0x0029 System Temperature Calibration Factors*/ - u8 res_1[22]; /* 0x0020 - 0x003f Reserved */ - u8 mac_size; /* 0x0040 Mac table size */ - u8 mac_flag; /* 0x0041 Mac table flags */ - u8 mac[8][6]; /* 0x0042 - 0x0071 Mac addresses */ - u32 crc; /* 0x0072 crc32 checksum */ -} EEPROM_data; - -static EEPROM_data mac_data; - -int mac_show(void) +#ifdef CONFIG_SYS_I2C_EEPROM_CCID +#include "../common/eeprom.h" +#define MAX_NUM_PORTS 8 +#endif + +#ifdef CONFIG_SYS_I2C_EEPROM_NXID +#define MAX_NUM_PORTS 23 +#define NXID_VERSION 1 +#endif + +/** + * static eeprom: EEPROM layout for CCID or NXID formats + * + * See application note AN3638 for details. + */ +static struct __attribute__ ((__packed__)) eeprom { +#ifdef CONFIG_SYS_I2C_EEPROM_CCID + u8 id[4]; /* 0x00 - 0x03 EEPROM Tag 'CCID' */ + u8 major; /* 0x04 Board revision, major */ + u8 minor; /* 0x05 Board revision, minor */ + u8 sn[10]; /* 0x06 - 0x0F Serial Number*/ + u8 errata[2]; /* 0x10 - 0x11 Errata Level */ + u8 date[6]; /* 0x12 - 0x17 Build Date */ + u8 res_0[40]; /* 0x18 - 0x3f Reserved */ + u8 mac_count; /* 0x40 Number of MAC addresses */ + u8 mac_flag; /* 0x41 MAC table flags */ + u8 mac[MAX_NUM_PORTS][6]; /* 0x42 - 0x71 MAC addresses */ + u32 crc; /* 0x72 CRC32 checksum */ +#endif +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + u8 id[4]; /* 0x00 - 0x03 EEPROM Tag 'NXID' */ + u8 sn[12]; /* 0x04 - 0x0F Serial Number */ + u8 errata[5]; /* 0x10 - 0x14 Errata Level */ + u8 date[6]; /* 0x15 - 0x1a Build Date */ + u8 res_0; /* 0x1b Reserved */ + u32 version; /* 0x1c - 0x1f NXID Version */ + u8 tempcal[8]; /* 0x20 - 0x27 Temperature Calibration Factors */ + u8 tempcalsys[2]; /* 0x28 - 0x29 System Temperature Calibration Factors */ + u8 tempcalflags; /* 0x2a Temperature Calibration Flags */ + u8 res_1[21]; /* 0x2b - 0x3f Reserved */ + u8 mac_count; /* 0x40 Number of MAC addresses */ + u8 mac_flag; /* 0x41 MAC table flags */ + u8 mac[MAX_NUM_PORTS][6]; /* 0x42 - x MAC addresses */ + u32 crc; /* x+1 CRC32 checksum */ +#endif +} e; + +/* Set to 1 if we've read EEPROM into memory */ +static int has_been_read = 0; + +#ifdef CONFIG_SYS_I2C_EEPROM_NXID +/* Is this a valid NXID EEPROM? */ +#define is_valid ((e.id[0] == 'N') || (e.id[1] == 'X') || \ + (e.id[2] == 'I') || (e.id[3] == 'D')) +#endif + +#ifdef CONFIG_SYS_I2C_EEPROM_CCID +/* Is this a valid CCID EEPROM? */ +#define is_valid ((e.id[0] == 'C') || (e.id[1] == 'C') || \ + (e.id[2] == 'I') || (e.id[3] == 'D')) +#endif + +/** + * show_eeprom - display the contents of the EEPROM + */ +static void show_eeprom(void) { int i; - u8 mac_size; - unsigned char ethaddr[8][18]; - unsigned char enetvar[32]; + unsigned int crc; - /* Show EEPROM tagID, - * always the four characters 'NXID'. - */ - printf("ID "); - for (i = 0; i < 4; i++) - printf("%c", mac_data.id[i]); - printf("\n"); + /* EEPROM tag ID, either CCID or NXID */ +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + printf("ID: %c%c%c%c v%u\n", e.id[0], e.id[1], e.id[2], e.id[3], + be32_to_cpu(e.version)); +#else + printf("ID: %c%c%c%c\n", e.id[0], e.id[1], e.id[2], e.id[3]); +#endif - /* Show Serial number, - * 0 to 11 charaters of errata information. - */ - printf("SN "); - for (i = 0; i < 12; i++) - printf("%c", mac_data.sn[i]); - printf("\n"); + /* Serial number */ + printf("SN: %s\n", e.sn); - /* Show Errata Level, - * 0 to 4 characters of errata information. - */ - printf("Errata "); - for (i = 0; i < 5; i++) - printf("%c", mac_data.errata[i]); - printf("\n"); + /* Errata level. */ +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + printf("Errata: %s\n", e.errata); +#else + printf("Errata: %c%c\n", + e.errata[0] ? e.errata[0] : '.', + e.errata[1] ? e.errata[1] : '.'); +#endif - /* Show Build Date, - * BCD date values, as YYMMDDhhmmss. - */ - printf("Date 20%02x/%02x/%02x %02x:%02x:%02x\n", - mac_data.date[0], - mac_data.date[1], - mac_data.date[2], - mac_data.date[3], - mac_data.date[4], - mac_data.date[5]); - - /* Show MAC table size, - * Value from 0 to 7 indicating how many MAC - * addresses are stored in the system EEPROM. - */ - if((mac_data.mac_size > 0) && (mac_data.mac_size <= 8)) - mac_size = mac_data.mac_size; - else - mac_size = 8; /* Set the max size */ - printf("MACSIZE %x\n", mac_size); - - /* Show Mac addresses */ - for (i = 0; i < mac_size; i++) { - sprintf((char *)ethaddr[i], - "%02x:%02x:%02x:%02x:%02x:%02x", - mac_data.mac[i][0], - mac_data.mac[i][1], - mac_data.mac[i][2], - mac_data.mac[i][3], - mac_data.mac[i][4], - mac_data.mac[i][5]); - printf("MAC %d %s\n", i, ethaddr[i]); - - sprintf((char *)enetvar, - i ? "eth%daddr" : "ethaddr", i); - setenv((char *)enetvar, (char *)ethaddr[i]); + /* Build date, BCD date values, as YYMMDDhhmmss */ + printf("Build date: 20%02x/%02x/%02x %02x:%02x:%02x %s\n", + e.date[0], e.date[1], e.date[2], + e.date[3] & 0x7F, e.date[4], e.date[5], + e.date[3] & 0x80 ? "PM" : ""); + + /* Show MAC addresses */ + for (i = 0; i < min(e.mac_count, MAX_NUM_PORTS); i++) { + u8 *p = e.mac[i]; + + printf("Eth%u: %02x:%02x:%02x:%02x:%02x:%02x\n", i, + p[0], p[1], p[2], p[3], p[4], p[5]); } - return 0; + crc = crc32(0, (void *)&e, sizeof(e) - 4); + + if (crc == be32_to_cpu(e.crc)) + printf("CRC: %08x\n", be32_to_cpu(e.crc)); + else + printf("CRC: %08x (should be %08x)\n", + be32_to_cpu(e.crc), crc); + +#ifdef DEBUG + printf("EEPROM dump: (0x%x bytes)\n", sizeof(e)); + for (i = 0; i < sizeof(e); i++) { + if ((i % 16) == 0) + printf("%02X: ", i); + printf("%02X ", ((u8 *)&e)[i]); + if (((i % 16) == 15) || (i == sizeof(e) - 1)) + printf("\n"); + } +#endif } -int mac_read(void) +/** + * read_eeprom - read the EEPROM into memory + */ +static int read_eeprom(void) { - int ret, length; - unsigned int crc = 0; - unsigned char dev = ID_EEPROM_ADDR, *data; + int ret; +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + unsigned int bus; +#endif - length = sizeof(EEPROM_data); - ret = i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length); - if (ret) { - printf("Read failed.\n"); - return -1; - } + if (has_been_read) + return 0; - data = (unsigned char *)(&mac_data); - printf("Check CRC on reading ..."); - crc = crc32(crc, data, length - 4); - if (crc != mac_data.crc) { - printf("CRC checksum is invalid, in EEPROM CRC is %x, calculated CRC is %x\n", - mac_data.crc, crc); - return -1; - } else { - printf("CRC OK\n"); - mac_show(); - } - return 0; +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + bus = i2c_get_bus_num(); + i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM); +#endif + + ret = i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, CONFIG_SYS_I2C_EEPROM_ADDR_LEN, + (void *)&e, sizeof(e)); + +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + i2c_set_bus_num(bus); +#endif + +#ifdef DEBUG + show_eeprom(); +#endif + + has_been_read = (ret == 0) ? 1 : 0; + + return ret; } -int mac_prog(void) +/** + * update_crc - update the CRC + * + * This function should be called after each update to the EEPROM structure, + * to make sure the CRC is always correct. + */ +static void update_crc(void) { - int ret, i, length; - unsigned int crc = 0; - unsigned char dev = ID_EEPROM_ADDR, *ptr; - unsigned char *eeprom_data = (unsigned char *)(&mac_data); - - mac_data.res_0 = 0; - memset((void *)mac_data.res_1, 0, sizeof(mac_data.res_1)); - - length = sizeof(EEPROM_data); - crc = crc32(crc, eeprom_data, length - 4); - mac_data.crc = crc; - for (i = 0, ptr = eeprom_data; i < length; i += 8, ptr += 8) { - ret = i2c_write(dev, i, 1, ptr, min((length - i),8)); - udelay(5000); /* 5ms write cycle timing */ + u32 crc; + + crc = crc32(0, (void *)&e, sizeof(e) - 4); + e.crc = cpu_to_be32(crc); +} + +/** + * prog_eeprom - write the EEPROM from memory + */ +static int prog_eeprom(void) +{ + int ret = 0; + int i; + void *p; +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + unsigned int bus; +#endif + + /* Set the reserved values to 0xFF */ +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + e.res_0 = 0xFF; + memset(e.res_1, 0xFF, sizeof(e.res_1)); +#else + memset(e.res_0, 0xFF, sizeof(e.res_0)); +#endif + update_crc(); + +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + bus = i2c_get_bus_num(); + i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM); +#endif + + /* + * The AT24C02 datasheet says that data can only be written in page + * mode, which means 8 bytes at a time, and it takes up to 5ms to + * complete a given write. + */ + for (i = 0, p = &e; i < sizeof(e); i += 8, p += 8) { + ret = i2c_write(CONFIG_SYS_I2C_EEPROM_ADDR, i, CONFIG_SYS_I2C_EEPROM_ADDR_LEN, + p, min((sizeof(e) - i), 8)); if (ret) break; + udelay(5000); /* 5ms write cycle timing */ } + + if (!ret) { + /* Verify the write by reading back the EEPROM and comparing */ + struct eeprom e2; + + ret = i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, + CONFIG_SYS_I2C_EEPROM_ADDR_LEN, (void *)&e2, sizeof(e2)); + if (!ret && memcmp(&e, &e2, sizeof(e))) + ret = -1; + } + +#ifdef CONFIG_SYS_EEPROM_BUS_NUM + i2c_set_bus_num(bus); +#endif + if (ret) { printf("Programming failed.\n"); + has_been_read = 0; return -1; - } else { - printf("Programming %d bytes. Reading back ...\n", length); - mac_read(); } + + printf("Programming passed.\n"); return 0; } -int do_mac(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) +/** + * h2i - converts hex character into a number + * + * This function takes a hexadecimal character (e.g. '7' or 'C') and returns + * the integer equivalent. + */ +static inline u8 h2i(char p) { - int i; - char cmd = 's'; - unsigned long long mac_val; + if ((p >= '0') && (p <= '9')) + return p - '0'; - if (i2c_probe(ID_EEPROM_ADDR) != 0) - return -1; + if ((p >= 'A') && (p <= 'F')) + return (p - 'A') + 10; + + if ((p >= 'a') && (p <= 'f')) + return (p - 'a') + 10; + + return 0; +} + +/** + * set_date - stores the build date into the EEPROM + * + * This function takes a pointer to a string in the format "YYMMDDhhmmss" + * (2-digit year, 2-digit month, etc), converts it to a 6-byte BCD string, + * and stores it in the build date field of the EEPROM local copy. + */ +static void set_date(const char *string) +{ + unsigned int i; + + if (strlen(string) != 12) { + printf("Usage: mac date YYMMDDhhmmss\n"); + return; + } + + for (i = 0; i < 6; i++) + e.date[i] = h2i(string[2 * i]) << 4 | h2i(string[2 * i + 1]); - if (argc > 1) { - cmd = argv[1][0]; + update_crc(); +} + +/** + * set_mac_address - stores a MAC address into the EEPROM + * + * This function takes a pointer to MAC address string + * (i.e."XX:XX:XX:XX:XX:XX", where "XX" is a two-digit hex number) and + * stores it in one of the MAC address fields of the EEPROM local copy. + */ +static void set_mac_address(unsigned int index, const char *string) +{ + char *p = (char *) string; + unsigned int i; + + if ((index >= MAX_NUM_PORTS) || !string) { + printf("Usage: mac XX:XX:XX:XX:XX:XX\n"); + return; + } + + for (i = 0; *p && (i < 6); i++) { + e.mac[index][i] = simple_strtoul(p, &p, 16); + if (*p == ':') + p++; + } + + update_crc(); +} + +int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + char cmd; + + if (argc == 1) { + show_eeprom(); + return 0; + } + + cmd = argv[1][0]; + + if (cmd == 'r') { + read_eeprom(); + return 0; + } + + if (cmd == 'i') { +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + memcpy(e.id, "NXID", sizeof(e.id)); + e.version = NXID_VERSION; +#else + memcpy(e.id, "CCID", sizeof(e.id)); +#endif + update_crc(); + return 0; + } + + if (!is_valid) { + printf("Please read the EEPROM ('r') and/or set the ID ('i') first.\n"); + return 0; + } + + if (argc == 2) { switch (cmd) { - case 'r': /* display */ - mac_read(); - break; case 's': /* save */ - mac_prog(); - break; - case 'i': /* id */ - for (i = 0; i < 4; i++) { - mac_data.id[i] = argv[2][i]; - } - break; - case 'n': /* serial number */ - for (i = 0; i < 12; i++) { - mac_data.sn[i] = argv[2][i]; - } - break; - case 'e': /* errata */ - for (i = 0; i < 5; i++) { - mac_data.errata[i] = argv[2][i]; - } + prog_eeprom(); break; - case 'd': /* date */ - mac_val = simple_strtoull(argv[2], NULL, 16); - for (i = 0; i < 6; i++) { - mac_data.date[i] = (mac_val >> (40 - 8 * i)); - } - break; - case 'p': /* mac table size */ - mac_data.mac_size = - (unsigned char)simple_strtoul(argv[2], NULL, 16); - break; - case '0': /* mac 0 */ - case '1': /* mac 1 */ - case '2': /* mac 2 */ - case '3': /* mac 3 */ - case '4': /* mac 4 */ - case '5': /* mac 5 */ - case '6': /* mac 6 */ - case '7': /* mac 7 */ - mac_val = simple_strtoull(argv[2], NULL, 16); - for (i = 0; i < 6; i++) { - mac_data.mac[cmd - '0'][i] = - *((unsigned char *) - (((unsigned int)(&mac_val)) + i + 2)); - } - break; - case 'h': /* help */ default: - printf("Usage:\n%s\n", cmdtp->usage); - break; + return cmd_usage(cmdtp); } - } else { - mac_show(); + + return 0; + } + + /* We know we have at least one parameter */ + + switch (cmd) { + case 'n': /* serial number */ + memset(e.sn, 0, sizeof(e.sn)); + strncpy((char *)e.sn, argv[2], sizeof(e.sn) - 1); + update_crc(); + break; + case 'e': /* errata */ +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + memset(e.errata, 0, 5); + strncpy((char *)e.errata, argv[2], 4); +#else + e.errata[0] = argv[2][0]; + e.errata[1] = argv[2][1]; +#endif + update_crc(); + break; + case 'd': /* date BCD format YYMMDDhhmmss */ + set_date(argv[2]); + break; + case 'p': /* MAC table size */ + e.mac_count = simple_strtoul(argv[2], NULL, 16); + update_crc(); + break; + case '0' ... '9': /* "mac 0" through "mac 22" */ + set_mac_address(simple_strtoul(argv[1], NULL, 10), argv[2]); + break; + case 'h': /* help */ + default: + return cmd_usage(cmdtp); } + return 0; } +/** + * mac_read_from_eeprom - read the MAC addresses from EEPROM + * + * This function reads the MAC addresses from EEPROM and sets the + * appropriate environment variables for each one read. + * + * The environment variables are only set if they haven't been set already. + * This ensures that any user-saved variables are never overwritten. + * + * This function must be called after relocation. + * + * For NXID v1 EEPROMs, we support loading and up-converting the older NXID v0 + * format. In a v0 EEPROM, there are only eight MAC addresses and the CRC is + * located at a different offset. + */ int mac_read_from_eeprom(void) { - int length, i; - unsigned char dev = ID_EEPROM_ADDR; - unsigned char *data; - unsigned char ethaddr[4][18]; - unsigned char enetvar[32]; - unsigned int crc = 0; - - length = sizeof(EEPROM_data); - if (i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length)) { + unsigned int i; + u32 crc, crc_offset = offsetof(struct eeprom, crc); + u32 *crcp; /* Pointer to the CRC in the data read from the EEPROM */ + + puts("EEPROM: "); + + if (read_eeprom()) { printf("Read failed.\n"); return -1; } - data = (unsigned char *)(&mac_data); - crc = crc32(crc, data, length - 4); - if (crc != mac_data.crc) { + if (!is_valid) { + printf("Invalid ID (%02x %02x %02x %02x)\n", + e.id[0], e.id[1], e.id[2], e.id[3]); + return -1; + } + +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + /* + * If we've read an NXID v0 EEPROM, then we need to set the CRC offset + * to where it is in v0. + */ + if (e.version == 0) + crc_offset = 0x72; +#endif + + crc = crc32(0, (void *)&e, crc_offset); + crcp = (void *)&e + crc_offset; + if (crc != be32_to_cpu(*crcp)) { + printf("CRC mismatch (%08x != %08x)\n", crc, be32_to_cpu(e.crc)); return -1; - } else { - for (i = 0; i < 4; i++) { - if (memcmp(&mac_data.mac[i], "\0\0\0\0\0\0", 6)) { - sprintf((char *)ethaddr[i], - "%02x:%02x:%02x:%02x:%02x:%02x", - mac_data.mac[i][0], - mac_data.mac[i][1], - mac_data.mac[i][2], - mac_data.mac[i][3], - mac_data.mac[i][4], - mac_data.mac[i][5]); - sprintf((char *)enetvar, - i ? "eth%daddr" : "ethaddr", - i); - setenv((char *)enetvar, (char *)ethaddr[i]); - } + } + +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + /* + * MAC address #9 in v1 occupies the same position as the CRC in v0. + * Erase it so that it's not mistaken for a MAC address. We'll + * update the CRC later. + */ + if (e.version == 0) + memset(e.mac[8], 0xff, 6); +#endif + + for (i = 0; i < min(e.mac_count, MAX_NUM_PORTS); i++) { + if (memcmp(&e.mac[i], "\0\0\0\0\0\0", 6) && + memcmp(&e.mac[i], "\xFF\xFF\xFF\xFF\xFF\xFF", 6)) { + char ethaddr[18]; + char enetvar[9]; + + sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X", + e.mac[i][0], + e.mac[i][1], + e.mac[i][2], + e.mac[i][3], + e.mac[i][4], + e.mac[i][5]); + sprintf(enetvar, i ? "eth%daddr" : "ethaddr", i); + /* Only initialize environment variables that are blank + * (i.e. have not yet been set) + */ + if (!getenv(enetvar)) + setenv(enetvar, ethaddr); } } + +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + printf("%c%c%c%c v%u\n", e.id[0], e.id[1], e.id[2], e.id[3], + be32_to_cpu(e.version)); +#else + printf("%c%c%c%c\n", e.id[0], e.id[1], e.id[2], e.id[3]); +#endif + +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + /* + * Now we need to upconvert the data into v1 format. We do this last so + * that at boot time, U-Boot will still say "NXID v0". + */ + if (e.version == 0) { + e.version = NXID_VERSION; + update_crc(); + } +#endif + return 0; } + +#ifdef CONFIG_SYS_I2C_EEPROM_CCID + +/** + * get_cpu_board_revision - get the CPU board revision on 85xx boards + * + * Read the EEPROM to determine the board revision. + * + * This function is called before relocation, so we need to read a private + * copy of the EEPROM into a local variable on the stack. + * + * Also, we assume that CONFIG_SYS_EEPROM_BUS_NUM == CONFIG_SYS_SPD_BUS_NUM. The global + * variable i2c_bus_num must be compile-time initialized to CONFIG_SYS_SPD_BUS_NUM, + * so that the SPD code will work. This means that all pre-relocation I2C + * operations can only occur on the CONFIG_SYS_SPD_BUS_NUM bus. So if + * CONFIG_SYS_EEPROM_BUS_NUM != CONFIG_SYS_SPD_BUS_NUM, then we can't read the EEPROM when + * this function is called. Oh well. + */ +unsigned int get_cpu_board_revision(void) +{ + struct board_eeprom { + u32 id; /* 0x00 - 0x03 EEPROM Tag 'CCID' */ + u8 major; /* 0x04 Board revision, major */ + u8 minor; /* 0x05 Board revision, minor */ + } be; + + i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, CONFIG_SYS_I2C_EEPROM_ADDR_LEN, + (void *)&be, sizeof(be)); + + if (be.id != (('C' << 24) | ('C' << 16) | ('I' << 8) | 'D')) + return MPC85XX_CPU_BOARD_REV(0, 0); + + if ((be.major == 0xff) && (be.minor == 0xff)) + return MPC85XX_CPU_BOARD_REV(0, 0); + + return MPC85XX_CPU_BOARD_REV(be.major, be.minor); +} +#endif