82598EB Datasheet, PDF (166/596 Pages) Intel Corporation – Intel® 82598EB 10 Gigabit Ethernet Controller Datasheet

Intel^® 82598EB 10 GbE Controller - Hardware EEPROM Sections
#define IXGBE_EEPROM_SUM
0xBABA
#define IXGBE_PCIE_ANALOG_PTR
03
#define IXGBE_FW_PTR
0F
static u16 ixgbe_eeprom_calc_checksum(struct ixgbe_hw *hw)
{
u16 i;
u16 j;
u16 checksum = 0;
u16 length = 0;
u16 pointer = 0;
u16 word = 0;
/* Include 0x0-0x3F in the checksum */
for (i = 0; i < IXGBE_EEPROM_CHECKSUM; i++) {
if (ixgbe_eeprom_read(hw, i, &word) != IXGBE_SUCCESS) {
DEBUGOUT("EEPROM read failed\n");
break;
}
checksum += word;
}
/* Include all data from pointers except for the fw pointer */
for (i = IXGBE_PCIE_ANALOG_PTR; i < IXGBE_FW_PTR; i++) {
ixgbe_eeprom_read(hw, i, &pointer);
/* Make sure the pointer seems valid */
if (pointer != 0xFFFF && pointer != 0) {
ixgbe_eeprom_read(hw, pointer, &length);
if (length != 0xFFFF && length != 0) {
for (j = pointer+1; j <= pointer+length; j++) {
ixgbe_eeprom_read(hw, j, &word);
checksum += word;
}
}
}
}
checksum = (u16)IXGBE_EEPROM_SUM – checksum;
return checksum;
}
3.4.3 Hardware EEPROM Sections
3.4.3.1 EEPROM Init Section
The init section (EEPROM control word 0x1, 0x2, and 0x38) are read after a PE_RST_N,
LAN_PWR_GOOD, or internal power on reset.
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