As an aide to debugging, we should print out the expected value of the
EEPROM checksum in addition to just saying that it is wrong.
Signed-off-by: Kyle Moffett <kyle.d.moff...@boeing.com>
Cc: Ben Warren <biggerbadder...@gmail.com>
---
No changes since v1
drivers/net/e1000.c | 48 ++++++++++++++++++++++++++++++------------------
1 files changed, 30 insertions(+), 18 deletions(-)
diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c
index 38eed37..5d957ad 100644
--- a/drivers/net/e1000.c
+++ b/drivers/net/e1000.c
@@ -873,29 +873,43 @@ e1000_read_eeprom(struct e1000_hw *hw, uint16_t offset,
* If the the sum of the 64 16 bit words is 0xBABA, the EEPROM's checksum is
* valid.
*****************************************************************************/
-static int
-e1000_validate_eeprom_checksum(struct eth_device *nic)
+static int e1000_validate_eeprom_checksum(struct e1000_hw *hw)
{
- struct e1000_hw *hw = nic->priv;
- uint16_t checksum = 0;
- uint16_t i, eeprom_data;
+ uint16_t i, checksum, checksum_reg, *buf;
DEBUGFUNC();
- for (i = 0; i < (EEPROM_CHECKSUM_REG + 1); i++) {
- if (e1000_read_eeprom(hw, i, 1, &eeprom_data) < 0) {
- DEBUGOUT("EEPROM Read Error\n");
- return -E1000_ERR_EEPROM;
- }
- checksum += eeprom_data;
+ /* Allocate a temporary buffer */
+ buf = malloc(sizeof(buf[0]) * (EEPROM_CHECKSUM_REG + 1));
+ if (!buf) {
+ printf("%s: ERROR: Unable to allocate EEPROM buffer!\n",
+ hw->nic->name);
+ return -E1000_ERR_EEPROM;
}
- if (checksum == (uint16_t) EEPROM_SUM) {
- return 0;
- } else {
- DEBUGOUT("EEPROM Checksum Invalid\n");
+ /* Read the EEPROM */
+ if (e1000_read_eeprom(hw, 0, EEPROM_CHECKSUM_REG + 1, buf) < 0) {
+ printf("%s: ERROR: Unable to read EEPROM!\n",
+ hw->nic->name);
return -E1000_ERR_EEPROM;
}
+
+ /* Compute the checksum */
+ for (i = 0; i < EEPROM_CHECKSUM_REG; i++)
+ checksum += buf[i];
+ checksum = ((uint16_t)EEPROM_SUM) - checksum;
+ checksum_reg = buf[i];
+
+ /* Verify it! */
+ if (checksum == checksum_reg)
+ return 0;
+
+ /* Hrm, verification failed, print an error */
+ printf("%s: ERROR: EEPROM checksum is incorrect!\n", hw->nic->name);
+ printf("%s: ERROR: ...register was 0x%04hx, calculated 0x%04hx\n",
+ hw->nic->name, checksum_reg, checksum);
+
+ return -E1000_ERR_EEPROM;
}
/*****************************************************************************
@@ -5226,10 +5240,8 @@ e1000_initialize(bd_t * bis)
printf("%s: ERROR: EEPROM is invalid!\n", nic->name);
continue;
}
- if (e1000_validate_eeprom_checksum(nic) < 0) {
- printf("%s: ERROR: EEPROM checksum is bad!\n",
nic->name);
+ if (e1000_validate_eeprom_checksum(hw))
continue;
- }
#endif
e1000_read_mac_addr(nic);
e1000_get_bus_type(hw);
--
1.7.2.3
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