/**
* e100_diag_eeprom - validate eeprom checksum correctness
* @dev: atapter's net device data struct
*
*/
static u8
e100_diag_eeprom (struct net_device *dev)
{
struct e100_private *bdp = dev->priv;
u16 i, eeprom_sum, eeprom_actual_csm;
for (i = 0, eeprom_sum = 0; i < (bdp->eeprom_size - 1); i++) {
eeprom_sum += e100_eeprom_read(bdp, i);
}
eeprom_actual_csm = e100_eeprom_read(bdp, bdp->eeprom_size - 1);
if (eeprom_actual_csm == (u16)(EEPROM_SUM - eeprom_sum)) {
return true;
}
return false;
}
//**********************************************************************************
// Procedure: e100_eeprom_update_chksum
//
// Description: Calculates the checksum and writes it to the EEProm.
// It calculates the checksum accroding to the formula:
// Checksum = 0xBABA - (sum of first 63 words).
//
//-----------------------------------------------------------------------------------
u16
e100_eeprom_calculate_chksum(struct e100_private *adapter)
{
u16 idx, xsum_index, checksum = 0;
// eeprom size is initialized to zero
if (!adapter->eeprom_size)
adapter->eeprom_size = e100_eeprom_size(adapter);
xsum_index = adapter->eeprom_size - 1;
for (idx = 0; idx < xsum_index; idx++)
checksum += e100_eeprom_read(adapter, idx);
checksum = EEPROM_CHECKSUM - checksum;
return checksum;
}
