diff options
Diffstat (limited to 'board/freescale/common/sys_eeprom.c')
-rw-r--r-- | board/freescale/common/sys_eeprom.c | 44 |
1 files changed, 34 insertions, 10 deletions
diff --git a/board/freescale/common/sys_eeprom.c b/board/freescale/common/sys_eeprom.c index 3929ad0aac..11dfd84fe6 100644 --- a/board/freescale/common/sys_eeprom.c +++ b/board/freescale/common/sys_eeprom.c @@ -28,13 +28,21 @@ #include <i2c.h> #include <linux/ctype.h> +#ifdef CONFIG_SYS_I2C_EEPROM_CCID #include "../common/eeprom.h" +#define MAX_NUM_PORTS 8 +#endif -#if !defined(CONFIG_SYS_I2C_EEPROM_CCID) && !defined(CONFIG_SYS_I2C_EEPROM_NXID) -#error "Please define either CONFIG_SYS_I2C_EEPROM_CCID or CONFIG_SYS_I2C_EEPROM_NXID" +#ifdef CONFIG_SYS_I2C_EEPROM_NXID +#define MAX_NUM_PORTS 8 +#define NXID_VERSION 0 #endif -#define MAX_NUM_PORTS 8 /* This value must be 8 as defined in doc */ +#ifdef CONFIG_SYS_I2C_EEPROM_NXID_1 +#define CONFIG_SYS_I2C_EEPROM_NXID +#define MAX_NUM_PORTS 23 +#define NXID_VERSION 1 +#endif /** * static eeprom: EEPROM layout for CCID or NXID formats @@ -68,8 +76,8 @@ static struct __attribute__ ((__packed__)) eeprom { 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 - 0x71 MAC addresses */ - u32 crc; /* 0x72 CRC32 checksum */ + u8 mac[MAX_NUM_PORTS][6]; /* 0x42 - x MAC addresses */ + u32 crc; /* x+1 CRC32 checksum */ #endif } e; @@ -204,7 +212,7 @@ static void update_crc(void) */ static int prog_eeprom(void) { - int ret = 0; /* shut up gcc */ + int ret = 0; int i; void *p; #ifdef CONFIG_SYS_EEPROM_BUS_NUM @@ -225,6 +233,11 @@ static int prog_eeprom(void) 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)); @@ -233,12 +246,23 @@ static int prog_eeprom(void) 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; } @@ -300,7 +324,7 @@ static void set_mac_address(unsigned int index, const char *string) char *p = (char *) string; unsigned int i; - if (!string) { + if ((index >= MAX_NUM_PORTS) || !string) { printf("Usage: mac <n> XX:XX:XX:XX:XX:XX\n"); return; } @@ -333,7 +357,7 @@ int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) if (cmd == 'i') { #ifdef CONFIG_SYS_I2C_EEPROM_NXID memcpy(e.id, "NXID", sizeof(e.id)); - e.version = 0; + e.version = NXID_VERSION; #else memcpy(e.id, "CCID", sizeof(e.id)); #endif @@ -382,8 +406,8 @@ int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 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]); + case '0' ... '9': /* "mac 0" through "mac 22" */ + set_mac_address(simple_strtoul(argv[1], NULL, 10), argv[2]); break; case 'h': /* help */ default: |