[Etherboot-developers] Intel 82559ER question

[BHARATHWAJ M. <mb...@co...>]

Hello,

I am trying to use etherboot with linuxBIOS (www.linuxbios.org), Intel
82559ER ethernet controller on a digital logic's smartcore-P5 (430TX)

Unfortunately, I am getting timing issues.  For instance, if I keep adding
printfs in the do loop in the function do_eeprom_cmd in eepro100.c, the
loop advances, if not it doesn't.  Here is my do_eeprom_cmd in eepro100.c:

static int do_eeprom_cmd(int cmd, int cmd_len)
{
        unsigned retval = 0;
        long ee_addr = ioaddr + SCBeeprom;

        outw(EE_ENB, ee_addr);
        printf("DEBUGGING -> Before udelay in " __FUNCTION__ "\n");
        udelay(2);
        printf("DEBUGGING -> After udelay in " __FUNCTION__ "\n");
        outw(EE_ENB | EE_SHIFT_CLK, ee_addr);
        printf("DEBUGGING -> After outw in " __FUNCTION__ "\n");
        udelay(2);


        /* Shift the command bits out. */
        printf("DEBUGGING -> Before shifting command bits in "
__FUNCTION__ "\n");
        do {
                short dataval = (cmd & (1 << cmd_len)) ? EE_WRITE_1 :
EE_WRITE_0;
                printf("DEBUGGING -> cmd_len: %d\n", cmd_len);
                outw(dataval, ee_addr);
                printf("DEBUGGING -> After outw(dataval, ee_addr) in "
__FUNCTION__
"\n");
		udelay(2);
                printf("DEBUGGING -> After udelay(2)\n");
                outw(dataval | EE_SHIFT_CLK, ee_addr);
                printf("DEBUGGING -> After outw(dataval | EE_SHIFT_CLK,
ee_addr)\n");
                udelay(2);
                printf("DEBUGGING -> After udelay(2)\n");
                retval = (retval << 1) | ((inw(ee_addr) & EE_DATA_READ) ?
1 : 0);
                printf("DEBUGGING -> After assigning value for retval in "
__FUNCTION__
"\n");
        } while (--cmd_len >= 0);
        printf("DEBUGGING -> After shifting command bits in " __FUNCTION__
"\n");
        outw(EE_ENB, ee_addr);
        udelay(2);

        /* Terminate the EEPROM access. */
        outw(EE_ENB & ~EE_CS, ee_addr);
        return retval;
}

Depending on the number of printfs inside the do loop, cmd_len decrements.
Can anyone help me resolve this timing issue, at least point me in the
correct debugging direction :) ?  I am totally lost at the present...

Bharath