diff options
Diffstat (limited to 'board/freescale/common/sys_eeprom.c')
| -rw-r--r-- | board/freescale/common/sys_eeprom.c | 81 |
1 files changed, 49 insertions, 32 deletions
diff --git a/board/freescale/common/sys_eeprom.c b/board/freescale/common/sys_eeprom.c index 3e1e33216..c0fff686b 100644 --- a/board/freescale/common/sys_eeprom.c +++ b/board/freescale/common/sys_eeprom.c @@ -186,12 +186,25 @@ static int read_eeprom(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) +{ + 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, i, length; - unsigned int crc; + int ret, i; void *p; #ifdef CONFIG_SYS_EEPROM_BUS_NUM unsigned int bus; @@ -204,19 +217,16 @@ static int prog_eeprom(void) #else memset(e.res_0, 0xFF, sizeof(e.res_0)); #endif - - length = sizeof(e); - crc = crc32(0, (void *)&e, length - 4); - e.crc = cpu_to_be32(crc); + update_crc(); #ifdef CONFIG_SYS_EEPROM_BUS_NUM bus = i2c_get_bus_num(); i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM); #endif - for (i = 0, p = &e; i < length; i += 8, p += 8) { + 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((length - i), 8)); + p, min((sizeof(e) - i), 8)); if (ret) break; udelay(5000); /* 5ms write cycle timing */ @@ -273,6 +283,8 @@ static void set_date(const char *string) for (i = 0; i < 6; i++) e.date[i] = h2i(string[2 * i]) << 4 | h2i(string[2 * i + 1]); + + update_crc(); } /** @@ -297,11 +309,12 @@ static void set_mac_address(unsigned int index, const char *string) if (*p == ':') p++; } + + update_crc(); } int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { - int i; char cmd; if (argc == 1) { @@ -316,9 +329,13 @@ int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return 0; } - if ((cmd == 'i') && (argc > 2)) { - for (i = 0; i < 4; i++) - e.id[i] = argv[2][i]; + if (cmd == 'i') { +#ifdef CONFIG_SYS_I2C_EEPROM_NXID + memcpy(e.id, "NXID", sizeof(e.id)); + e.version = 0; +#else + memcpy(e.id, "CCID", sizeof(e.id)); +#endif return 0; } @@ -346,6 +363,7 @@ int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 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 @@ -355,12 +373,14 @@ int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 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' ... '7': /* "mac 0" through "mac 7" */ set_mac_address(cmd - '0', argv[2]); @@ -388,6 +408,9 @@ int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) int mac_read_from_eeprom(void) { unsigned int i; + u32 crc; + + puts("EEPROM: "); if (read_eeprom()) { printf("Read failed.\n"); @@ -395,31 +418,18 @@ int mac_read_from_eeprom(void) } if (!is_valid) { - printf("Invalid ID (%02x %02x %02x %02x)\n", e.id[0], e.id[1], e.id[2], e.id[3]); + printf("Invalid ID (%02x %02x %02x %02x)\n", + e.id[0], e.id[1], e.id[2], e.id[3]); return -1; } - if (be32_to_cpu(e.crc) != 0xFFFFFFFF) { - u32 crc = crc32(0, (void *)&e, sizeof(e) - 4); - - if (crc != be32_to_cpu(e.crc)) { - printf("CRC mismatch (%08x != %08x).\n", crc, - be32_to_cpu(e.crc)); - return -1; - } - } - - /* Check the number of MAC addresses which is limited to - * MAX_NUM_PORTS. - */ - if (e.mac_count > MAX_NUM_PORTS) { - printf("Warning: The number of MAC addresses is greater" - " than %u, force it to %u.\n", MAX_NUM_PORTS, - MAX_NUM_PORTS); - e.mac_count = MAX_NUM_PORTS; + crc = crc32(0, (void *)&e, sizeof(e) - 4); + if (crc != be32_to_cpu(e.crc)) { + printf("CRC mismatch (%08x != %08x)\n", crc, be32_to_cpu(e.crc)); + return -1; } - for (i = 0; i < e.mac_count; i++) { + 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]; @@ -441,6 +451,13 @@ int mac_read_from_eeprom(void) } } +#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 + return 0; } |