From 8d9bde0dbb1972f7cfff3757238abe311e21d4d0 Mon Sep 17 00:00:00 2001 From: Hannu Lounento Date: Wed, 10 Jan 2018 20:31:26 +0100 Subject: [PATCH] net: e1000: implement eth_write_hwaddr Implement programming MAC address to the hardware, i.e. external flash seen as EEPROM. MAC address is only written if it differs from what is already stored in flash or if reading the current MAC address fails. Signed-off-by: Hannu Lounento CC: Joe Hershberger Signed-off-by: Martyn Welch Signed-off-by: Sebastian Reichel --- drivers/net/e1000.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c index 868616b488..8316854bc1 100644 --- a/drivers/net/e1000.c +++ b/drivers/net/e1000.c @@ -5649,6 +5649,45 @@ e1000_poll(struct eth_device *nic) return len ? 1 : 0; } +static int e1000_write_hwaddr(struct eth_device *dev) +{ +#ifndef CONFIG_E1000_NO_NVM + unsigned char *mac = dev->enetaddr; + unsigned char current_mac[6]; + struct e1000_hw *hw = dev->priv; + uint16_t data[3]; + int ret_val, i; + + DEBUGOUT("%s: mac=%pM\n", __func__, mac); + + memset(current_mac, 0, 6); + + /* Read from EEPROM, not from registers, to make sure + * the address is persistently configured + */ + ret_val = e1000_read_mac_addr_from_eeprom(hw, current_mac); + DEBUGOUT("%s: current mac=%pM\n", __func__, current_mac); + + /* Only write to EEPROM if the given address is different or + * reading the current address failed + */ + if (!ret_val && memcmp(current_mac, mac, 6) == 0) + return 0; + + for (i = 0; i < 3; ++i) + data[i] = mac[i * 2 + 1] << 8 | mac[i * 2]; + + ret_val = e1000_write_eeprom_srwr(hw, 0x0, 3, data); + + if (!ret_val) + ret_val = e1000_update_eeprom_checksum_i210(hw); + + return ret_val; +#else + return 0; +#endif +} + /************************************************************************** PROBE - Look for an adapter, this routine's visible to the outside You should omit the last argument struct pci_device * for a non-PCI NIC @@ -5698,6 +5737,7 @@ e1000_initialize(bd_t * bis) nic->recv = e1000_poll; nic->send = e1000_transmit; nic->halt = e1000_disable; + nic->write_hwaddr = e1000_write_hwaddr; eth_register(nic); }