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