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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>
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)
{
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]);
}
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);
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 */
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 */
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;
}
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;
}
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