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-rw-r--r--board/freescale/common/sys_eeprom.c598
1 files changed, 392 insertions, 206 deletions
diff --git a/board/freescale/common/sys_eeprom.c b/board/freescale/common/sys_eeprom.c
index 8b13d06..d8631eb 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 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 +28,443 @@
#include <i2c.h>
#include <linux/ctype.h>
-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)
+#include "../common/eeprom.h"
+
+#if !defined(CFG_I2C_EEPROM_CCID) && !defined(CFG_I2C_EEPROM_NXID)
+#error "Please define either CFG_I2C_EEPROM_CCID or CFG_I2C_EEPROM_NXID"
+#endif
+
+/**
+ * static eeprom: EEPROM layout for CCID or NXID formats
+ *
+ * See application note AN3638 for details.
+ */
+static struct __attribute__ ((__packed__)) eeprom {
+#ifdef CFG_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[8][6]; /* 0x42 - 0x71 MAC addresses */
+ u32 crc; /* 0x72 CRC32 checksum */
+#endif
+#ifdef CFG_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[8][6]; /* 0x42 - 0x71 MAC addresses */
+ u32 crc; /* 0x72 CRC32 checksum */
+#endif
+} e;
+
+/* Set to 1 if we've read EEPROM into memory */
+static int has_been_read = 0;
+
+#ifdef CFG_I2C_EEPROM_NXID
+/* Is this a valid NXID EEPROM? */
+#define is_valid (*((u32 *)e.id) == (('N' << 24) | ('X' << 16) | ('I' << 8) | 'D'))
+#endif
+
+#ifdef CFG_I2C_EEPROM_CCID
+/* Is this a valid CCID EEPROM? */
+#define is_valid (*((u32 *)e.id) == (('C' << 24) | ('C' << 16) | ('I' << 8) | '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];
-
- /* Show EEPROM tagID,
- * always the four characters 'NXID'.
- */
- printf("ID ");
- for (i = 0; i < 4; i++)
- printf("%c", mac_data.id[i]);
- printf("\n");
-
- /* 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");
-
- /* 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");
-
- /* 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]);
+ unsigned int crc;
+
+ /* EEPROM tag ID, either CCID or NXID */
+#ifdef CFG_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
+
+ /* Serial number */
+ printf("SN: %s\n", e.sn);
+
+ /* Errata level. */
+#ifdef CFG_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
+
+ /* 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, 8); 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 CFG_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 CFG_EEPROM_BUS_NUM
+ bus = i2c_get_bus_num();
+ i2c_set_bus_num(CFG_EEPROM_BUS_NUM);
+#endif
+
+ ret = i2c_read(CFG_I2C_EEPROM_ADDR, 0, CFG_I2C_EEPROM_ADDR_LEN,
+ (void *)&e, sizeof(e));
+
+#ifdef CFG_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)
+/**
+ * prog_eeprom - write the EEPROM from memory
+ */
+static int prog_eeprom(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 */
+ unsigned int crc;
+ void *p;
+#ifdef CFG_EEPROM_BUS_NUM
+ unsigned int bus;
+#endif
+
+ /* Set the reserved values to 0xFF */
+#ifdef CFG_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
+
+ length = sizeof(e);
+ crc = crc32(0, (void *)&e, length - 4);
+ e.crc = cpu_to_be32(crc);
+
+#ifdef CFG_EEPROM_BUS_NUM
+ bus = i2c_get_bus_num();
+ i2c_set_bus_num(CFG_EEPROM_BUS_NUM);
+#endif
+
+ for (i = 0, p = &e; i < length; i += 8, p += 8) {
+ ret = i2c_write(CFG_I2C_EEPROM_ADDR, i, CFG_I2C_EEPROM_ADDR_LEN,
+ p, min((length - i), 8));
if (ret)
break;
+ udelay(5000); /* 5ms write cycle timing */
}
+
+#ifdef CFG_EEPROM_BUS_NUM
+ i2c_set_bus_num(bus);
+#endif
+
if (ret) {
printf("Programming failed.\n");
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)
+{
+ if ((p >= '0') && (p <= '9'))
+ return p - '0';
+
+ 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]);
+}
+
+/**
+ * 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 (!string) {
+ printf("Usage: mac <n> 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++;
+ }
+}
+
+int do_mac(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
int i;
- char cmd = 's';
- unsigned long long mac_val;
+ char cmd;
- if (i2c_probe(ID_EEPROM_ADDR) != 0)
- return -1;
+ if (argc == 1) {
+ show_eeprom();
+ return 0;
+ }
+
+ cmd = argv[1][0];
+
+ if (cmd == 'r') {
+ read_eeprom();
+ return 0;
+ }
- if (argc > 1) {
- cmd = argv[1][0];
+ if ((cmd == 'i') && (argc > 2)) {
+ for (i = 0; i < 4; i++)
+ e.id[i] = argv[2][i];
+ 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];
- }
+ prog_eeprom();
break;
- case 'e': /* errata */
- for (i = 0; i < 5; i++) {
- mac_data.errata[i] = argv[2][i];
- }
- 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;
}
- } 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);
+ break;
+ case 'e': /* errata */
+#ifdef CFG_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
+ 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);
+ break;
+ case '0' ... '7': /* "mac 0" through "mac 7" */
+ set_mac_address(cmd - '0', argv[2]);
+ break;
+ case 'h': /* help */
+ default:
+ printf("Usage:\n%s\n", cmdtp->usage);
+ break;
}
+
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.
+ */
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;
+
+ 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;
- } 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]);
- }
+ }
+
+ 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;
}
}
+
+ for (i = 0; i < min(4, e.mac_count); 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);
+ }
+ }
+
return 0;
}
+
+#ifdef CFG_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 CFG_EEPROM_BUS_NUM == CFG_SPD_BUS_NUM. The global
+ * variable i2c_bus_num must be compile-time initialized to CFG_SPD_BUS_NUM,
+ * so that the SPD code will work. This means that all pre-relocation I2C
+ * operations can only occur on the CFG_SPD_BUS_NUM bus. So if
+ * CFG_EEPROM_BUS_NUM != CFG_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(CFG_I2C_EEPROM_ADDR, 0, CFG_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(e.major, e.minor);
+}
+
+#endif
+
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