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Diffstat (limited to 'board/freescale/common/sys_eeprom.c')
-rw-r--r--board/freescale/common/sys_eeprom.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/board/freescale/common/sys_eeprom.c b/board/freescale/common/sys_eeprom.c
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+++ b/board/freescale/common/sys_eeprom.c
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+/*
+ * Copyright 2006 Freescale Semiconductor
+ * York Sun (yorksun@freescale.com)
+ * Haiying Wang (haiying.wang@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>
+#include <linux/ctype.h>
+
+#ifdef CFG_ID_EEPROM
+typedef struct {
+ unsigned char id[4]; /* 0x0000 - 0x0003 */
+ unsigned char sn[12]; /* 0x0004 - 0x000F */
+ unsigned char errata[5]; /* 0x0010 - 0x0014 */
+ unsigned char date[7]; /* 0x0015 - 0x001a */
+ unsigned char res_1[37]; /* 0x001b - 0x003f */
+ unsigned char tab_size; /* 0x0040 */
+ unsigned char tab_flag; /* 0x0041 */
+ unsigned char mac[8][6]; /* 0x0042 - 0x0071 */
+ unsigned char res_2[126]; /* 0x0072 - 0x00ef */
+ unsigned int crc; /* 0x00f0 - 0x00f3 crc32 checksum */
+} EEPROM_data;
+
+static EEPROM_data mac_data;
+
+int mac_show(void)
+{
+ int i;
+ unsigned char ethaddr[8][18];
+
+ printf("ID %c%c%c%c\n",
+ mac_data.id[0],
+ mac_data.id[1],
+ mac_data.id[2],
+ mac_data.id[3]);
+ printf("Errata %c%c%c%c%c\n",
+ mac_data.errata[0],
+ mac_data.errata[1],
+ mac_data.errata[2],
+ mac_data.errata[3],
+ mac_data.errata[4]);
+ printf("Date %c%c%c%c%c%c%c\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],
+ mac_data.date[6]);
+ for (i = 0; i < 8; 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]);
+ }
+
+ setenv("ethaddr", (char *)ethaddr[0]);
+ setenv("eth1addr", (char *)ethaddr[1]);
+ setenv("eth2addr", (char *)ethaddr[2]);
+ setenv("eth3addr", (char *)ethaddr[3]);
+
+ return 0;
+}
+
+int mac_read(void)
+{
+ int ret, length;
+ unsigned int crc = 0;
+ unsigned char dev = ID_EEPROM_ADDR, *data;
+
+ length = sizeof(EEPROM_data);
+ ret = i2c_read(dev, 0, 1, (unsigned char *)(&mac_data), length);
+ if (ret) {
+ printf("Read failed.\n");
+ return -1;
+ }
+
+ 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;
+}
+
+int mac_prog(void)
+{
+ int ret, i, length;
+ unsigned int crc = 0;
+ unsigned char dev = ID_EEPROM_ADDR, *ptr;
+ unsigned char *eeprom_data = (unsigned char *)(&mac_data);
+
+ for (i = 0; i < sizeof(mac_data.res_1); i++)
+ mac_data.res_1[i] = 0;
+ for (i = 0; i < sizeof(mac_data.res_2); i++)
+ mac_data.res_2[i] = 0;
+ 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,
+ (length - i) < 8 ? (length - i) : 8);
+ udelay(5000); /* 5ms write cycle timing */
+ if (ret)
+ break;
+ }
+ if (ret) {
+ printf("Programming failed.\n");
+ return -1;
+ } else {
+ printf("Programming %d bytes. Reading back ...\n", length);
+ mac_read();
+ }
+ return 0;
+}
+
+int do_mac(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ int i;
+ char cmd = 's';
+ unsigned long long mac_val;
+
+ if (i2c_probe(ID_EEPROM_ADDR) != 0)
+ return -1;
+
+ if (argc > 1) {
+ cmd = argv[1][0];
+ 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];
+ }
+ break;
+ case 'e': /* errata */
+ for (i = 0; i < 5; i++) {
+ mac_data.errata[i] = argv[2][i];
+ }
+ break;
+ case 'd': /* date */
+ for (i = 0; i < 7; i++) {
+ mac_data.date[i] = argv[2][i];
+ }
+ break;
+ case 'p': /* number of ports */
+ mac_data.tab_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;
+}
+
+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)) {
+ printf("Read failed.\n");
+ return -1;
+ }
+
+ data = (unsigned char *)(&mac_data);
+ crc = crc32(crc, data, length - 4);
+ if (crc != mac_data.crc) {
+ 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]);
+ }
+ }
+ }
+ return 0;
+}
+#endif /* CFG_ID_EEPROM */
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