[U-Boot-Users] Problem in Passing MAC address from u-boot to linux after reading it from eeprom
Vijay
g.vijaychakravarthy at gdatech.co.in
Tue Nov 8 16:17:21 CET 2005
Hello All,
I am working on u-boot-1.1.2 and working on MPC8540 based board.I have one issue regarding reading MAC address from EEPROM and passing the same to Linux. I added little bit of code in common/main.c to read mac address from eeprom as follows.
printf("\n Reading EEPROM for MAC addresses");
if(i2c_read(0x50, 0, 1, macbuf, 12) != 0)
puts ("Error reading EEPROM chip for MAC address.\n");
udelay(100);
sprintf(macaddr1,"%02X:%02X:%02X:%02X:%02X:%02X\n",macbuf[0],macbuf[1],macbuf[2],macbuf[3],macbuf[4],macbuf[5]);
sprintf(macaddr2,"%02X:%02X:%02X:%02X:%02X:%02X\n",macbuf[6],macbuf[7],macbuf[8],macbuf[9],macbuf[10],macbuf[11]);
printf("\n%s",macaddr1);
printf("%s",macaddr2);
eth_set_enetaddr(0,macaddr1);
eth_set_enetaddr(1,macaddr2);
and added code in common/cmd_nvedit.c to update the same board info structure to be passed to the linux.
else
{
int i;
extern unsigned char macbuf[];
for (i=0; i<6; ++i) {
bd->bi_enetaddr[i] = macbuf[i];
}
for (i=6; i<12; ++i) {
bd->bi_enet1addr[i-6] = macbuf[i];
}
The problem being, the linux is getting the MAC address that was read from eeprom if I download linux and ramdisk to RAM using tftp and bootm by giving ram addresses. Linux is not getting the Mac addresses if I bootm by giving flash addresses of linux and ramdisk that are present in flash.
Thanks in advance.
Regards.
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