1 files changed, 395 insertions, 0 deletions
diff --git a/board/matrix_vision/mvblx/sys_eeprom.c b/board/matrix_vision/mvblx/sys_eeprom.c
new file mode 100644
index 000000000..945a36dfe
--- /dev/null
+++ b/board/matrix_vision/mvblx/sys_eeprom.c
@@ -0,0 +1,395 @@
+/*
+ * 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.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <i2c.h>
+
+/* #define DEBUG */
+
+/*
+ * static eeprom: EEPROM layout
+ */
+static struct __attribute__ ((__packed__)) eeprom {
+	u8 id[16];		/* 0x01 - 0x0F Type e.g. 100wG-5111 */
+	u8 sn[10];		/* 0x10 - 0x19 Serial Number */
+	u8 date[6];		/* 0x1A - 0x1F Build Date */
+	u8 mac[6];		/* 0x20 - 0x25 MAC address  */
+	u8 reserved[10];/* 0x26 - 0x2f reserved */
+	u32 crc;        /* x+1         CRC32 checksum */
+} e;
+
+/* Set to 1 if we've read EEPROM into memory */
+static int has_been_read;
+
+/**
+ * show_eeprom - display the contents of the EEPROM
+ */
+static void show_eeprom(void)
+{
+	unsigned int crc;
+	char safe_string[16];
+
+#ifdef DEBUG
+	int i;
+#endif
+	u8 *p;
+
+	/* ID */
+	strncpy(safe_string, (char *)e.id, sizeof(e.id));
+	safe_string[sizeof(e.id)-1] = 0;
+	printf("ID: mvBlueLYNX-X%s\n", safe_string);
+
+	/* Serial number */
+	strncpy(safe_string, (char *)e.sn, sizeof(e.sn));
+	safe_string[sizeof(e.sn)-1] = 0;
+	printf("SN: %s\n", safe_string);
+
+	/* 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 address  */
+	p = e.mac;
+	printf("Eth: %02x:%02x:%02x:%02x:%02x:%02x\n",
+		p[0], p[1], p[2], p[3],	p[4], p[5]);
+
+	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
+}
+
+/**
+ * read_eeprom - read the EEPROM into memory
+ */
+static int read_eeprom(void)
+{
+	int ret;
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+	unsigned int bus;
+#endif
+
+	if (has_been_read)
+		return 0;
+
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+	bus = i2c_get_bus_num();
+	i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM);
+#endif
+
+	ret = eeprom_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0,
+		(uchar *)&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;
+}
+
+/**
+ *  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 = 0;
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+	unsigned int bus;
+#endif
+
+	update_crc();
+
+#ifdef CONFIG_SYS_EEPROM_BUS_NUM
+	bus = i2c_get_bus_num();
+	i2c_set_bus_num(CONFIG_SYS_EEPROM_BUS_NUM);
+#endif
+
+	ret = eeprom_write(CONFIG_SYS_I2C_EEPROM_ADDR, 0,
+		(uchar *)&e, sizeof(e));
+
+	if (!ret) {
+		/* Verify the write by reading back the EEPROM and comparing */
+		struct eeprom e2;
+#ifdef DEBUG
+		printf("%s verifying...\n", __func__);
+#endif
+		ret = eeprom_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0,
+			(uchar *)&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;
+	}
+
+	printf("Programming passed.\n");
+	return 0;
+}
+
+/**
+ * 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]);
+
+	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 the MAC address field in the EEPROM local copy.
+ */
+static void set_mac_address(const char *string)
+{
+	char *p = (char *) string;
+	unsigned int i;
+
+	for (i = 0; *p && (i < 6); i++) {
+		e.mac[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') {
+#ifdef DEBUG
+		printf("%s read\n", __func__);
+#endif
+		read_eeprom();
+		return 0;
+	}
+
+	if (argc == 2) {
+		switch (cmd) {
+		case 's':	/* save */
+#ifdef DEBUG
+			printf("%s save\n", __func__);
+#endif
+			prog_eeprom();
+			break;
+		default:
+			return cmd_usage(cmdtp);
+		}
+
+		return 0;
+	}
+
+	/* We know we have at least one parameter  */
+
+	switch (cmd) {
+	case 'n':	/* serial number */
+#ifdef DEBUG
+		printf("%s serial number\n", __func__);
+#endif
+		memset(e.sn, 0, sizeof(e.sn));
+		strncpy((char *)e.sn, argv[2], sizeof(e.sn) - 1);
+		update_crc();
+		break;
+	case 'd':	/* date BCD format YYMMDDhhmmss */
+		set_date(argv[2]);
+		break;
+	case 'e':	/* errata */
+		printf("mac errata not implemented\n");
+		break;
+	case 'i':	/* id */
+		memset(e.id, 0, sizeof(e.id));
+		strncpy((char *)e.id, argv[2], sizeof(e.id) - 1);
+		update_crc();
+		break;
+	case 'p':	/* ports */
+		printf("mac ports not implemented (always 1 port)\n");
+		break;
+	case '0' ... '9':
+		/* we only have "mac 0" but any digit can be used here */
+		set_mac_address(argv[2]);
+		break;
+	case 'h':	/* help */
+	default:
+		return cmd_usage(cmdtp);
+	}
+
+	return 0;
+}
+
+int mac_read_from_eeprom(void)
+{
+	u32 crc, crc_offset = offsetof(struct eeprom, crc);
+	u32 *crcp; /* Pointer to the CRC in the data read from the EEPROM */
+
+	if (read_eeprom()) {
+		printf("EEPROM Read failed.\n");
+		return -1;
+	}
+
+	crc = crc32(0, (void *)&e, crc_offset);
+	crcp = (void *)&e + crc_offset;
+	if (crc != be32_to_cpu(*crcp)) {
+		printf("EEPROM CRC mismatch (%08x != %08x)\n", crc,
+			be32_to_cpu(e.crc));
+		return -1;
+	}
+
+	if (memcmp(&e.mac, "\0\0\0\0\0\0", 6) &&
+		memcmp(&e.mac, "\xFF\xFF\xFF\xFF\xFF\xFF", 6)) {
+		char ethaddr[9];
+
+		sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
+			e.mac[0],
+			e.mac[1],
+			e.mac[2],
+			e.mac[3],
+			e.mac[4],
+			e.mac[5]);
+		/* Only initialize environment variables that are blank
+		 * (i.e. have not yet been set)
+		 */
+		if (!getenv("ethaddr"))
+			setenv("ethaddr", ethaddr);
+	}
+
+	if (memcmp(&e.sn, "\0\0\0\0\0\0\0\0\0\0", 10) &&
+		memcmp(&e.sn, "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF", 10)) {
+		char serial_num[12];
+
+		strncpy(serial_num, (char *)e.sn, sizeof(e.sn) - 1);
+		/* Only initialize environment variables that are blank
+		 * (i.e. have not yet been set)
+		 */
+		if (!getenv("serial#"))
+			setenv("serial#", serial_num);
+	}
+
+	/* TODO should I calculate CRC here? */
+	return 0;
+}
+
+#ifdef CONFIG_SERIAL_TAG
+void get_board_serial(struct tag_serialnr *serialnr)
+{
+	char *serial = getenv("serial#");
+
+	if (serial && (strlen(serial) > 3)) {
+		/* use the numerical part of the serial number LXnnnnnn */
+		serialnr->high = 0;
+		serialnr->low = simple_strtoul(serial + 2, NULL, 10);
+	} else {
+		serialnr->high = 0;
+		serialnr->low = 0;
+	}
+}
+#endif