u-boot/board/atmel/common/mac_eeprom.c
Eugen Hristev 68d3ec599e board: atmel: common: introduce at91_set_eth1addr for second interface
We already have a function to retrieve the mac address from one EEPROM.
For boards with a second Ethernet interface, however, we would
require another EEPROM with a second unique MAC address.
Introduce at91_set_eth1addr which will look for a second EEPROM
and set the 'eth1addr' variable with the obtained MAC address.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
2020-09-22 11:27:18 +03:00

71 lines
1.5 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Microchip
* Wenyou Yang <wenyou.yang@microchip.com>
*/
#include <common.h>
#include <dm.h>
#include <eeprom.h>
#include <env.h>
#include <i2c_eeprom.h>
#include <net.h>
#include <netdev.h>
int at91_set_ethaddr(int offset)
{
const int ETH_ADDR_LEN = 6;
unsigned char ethaddr[ETH_ADDR_LEN];
const char *ETHADDR_NAME = "ethaddr";
struct udevice *dev;
int ret;
if (env_get(ETHADDR_NAME))
return 0;
ret = uclass_first_device_err(UCLASS_I2C_EEPROM, &dev);
if (ret)
return ret;
ret = i2c_eeprom_read(dev, offset, ethaddr, 6);
if (ret)
return ret;
if (is_valid_ethaddr(ethaddr))
eth_env_set_enetaddr(ETHADDR_NAME, ethaddr);
return 0;
}
/* this function will set eth1addr from a second eeprom, if available */
int at91_set_eth1addr(int offset)
{
const int ETH_ADDR_LEN = 6;
unsigned char ethaddr[ETH_ADDR_LEN];
/* configure eth1addr for second interface */
const char *ETHADDR_NAME = "eth1addr";
struct udevice *dev;
int ret;
if (env_get(ETHADDR_NAME))
return 0;
/* first eeprom is retrieved, this is for the first interface */
ret = uclass_first_device_err(UCLASS_I2C_EEPROM, &dev);
if (ret)
return ret;
/* attempt to obtain a second eeprom device */
ret = uclass_next_device(&dev);
if (ret)
return ret;
ret = i2c_eeprom_read(dev, offset, ethaddr, 6);
if (ret)
return ret;
if (is_valid_ethaddr(ethaddr))
eth_env_set_enetaddr(ETHADDR_NAME, ethaddr);
return 0;
}