diff options
Diffstat (limited to 'board/freescale/common/sys_eeprom.c')
| -rw-r--r-- | board/freescale/common/sys_eeprom.c | 50 |
1 files changed, 40 insertions, 10 deletions
diff --git a/board/freescale/common/sys_eeprom.c b/board/freescale/common/sys_eeprom.c index 3ecfb06..d2ed036 100644 --- a/board/freescale/common/sys_eeprom.c +++ b/board/freescale/common/sys_eeprom.c @@ -1,5 +1,5 @@ /* - * Copyright 2006, 2008-2009 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) @@ -34,12 +34,6 @@ #endif #ifdef CONFIG_SYS_I2C_EEPROM_NXID -#define MAX_NUM_PORTS 8 -#define NXID_VERSION 0 -#endif - -#ifdef CONFIG_SYS_I2C_EEPROM_NXID_1 -#define CONFIG_SYS_I2C_EEPROM_NXID #define MAX_NUM_PORTS 23 #define NXID_VERSION 1 #endif @@ -428,11 +422,16 @@ int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) * 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) { unsigned int i; - u32 crc; + u32 crc, crc_offset = offsetof(struct eeprom, crc); + u32 *crcp; /* Pointer to the CRC in the data read from the EEPROM */ puts("EEPROM: "); @@ -447,12 +446,32 @@ int mac_read_from_eeprom(void) return -1; } - crc = crc32(0, (void *)&e, sizeof(e) - 4); - if (crc != be32_to_cpu(e.crc)) { +#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; } +#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)) { @@ -482,6 +501,17 @@ int mac_read_from_eeprom(void) 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; } |