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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 PHYTEC Messtechnik GmbH
* Author: Wadim Egorov <w.egorov@phytec.de>
*/
#include <asm/io.h>
#include <common.h>
#include <dm.h>
#include <environment.h>
#include <i2c.h>
#include <i2c_eeprom.h>
#include <netdev.h>
#include "som.h"
static int valid_rk3288_som(struct rk3288_som *som)
{
unsigned char *p = (unsigned char *)som;
unsigned char *e = p + sizeof(struct rk3288_som) - 1;
int hw = 0;
while (p < e) {
hw += hweight8(*p);
p++;
}
return hw == som->bs;
}
int rk_board_late_init(void)
{
int ret;
struct udevice *dev;
struct rk3288_som opt;
int off;
/* Get the identificatioin page of M24C32-D EEPROM */
off = fdt_path_offset(gd->fdt_blob, "eeprom0");
if (off < 0) {
printf("%s: No eeprom0 path offset\n", __func__);
return off;
}
ret = uclass_get_device_by_of_offset(UCLASS_I2C_EEPROM, off, &dev);
if (ret) {
printf("%s: Could not find EEPROM\n", __func__);
return ret;
}
ret = i2c_set_chip_offset_len(dev, 2);
if (ret)
return ret;
ret = i2c_eeprom_read(dev, 0, (uint8_t *)&opt,
sizeof(struct rk3288_som));
if (ret) {
printf("%s: Could not read EEPROM\n", __func__);
return ret;
}
if (opt.api_version != 0 || !valid_rk3288_som(&opt)) {
printf("Invalid data or wrong EEPROM layout version.\n");
/* Proceed anyway, since there is no fallback option */
}
if (is_valid_ethaddr(opt.mac))
eth_env_set_enetaddr("ethaddr", opt.mac);
return 0;
}
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