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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 Kontron Electronics GmbH
*/
#include <asm/arch/imx-regs.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <fdt_support.h>
#include <linux/errno.h>
#include <net.h>
DECLARE_GLOBAL_DATA_PTR;
int board_phys_sdram_size(phys_size_t *size)
{
u32 ddr_size = readl(M4_BOOTROM_BASE_ADDR);
if (ddr_size == 4) {
*size = 0x100000000;
} else if (ddr_size == 3) {
*size = 0xc0000000;
} else if (ddr_size == 2) {
*size = 0x80000000;
} else if (ddr_size == 1) {
*size = 0x40000000;
} else {
printf("Unknown DDR type!!!\n");
*size = 0x40000000;
}
return 0;
}
/*
* If the SoM is mounted on a baseboard with a USB ethernet controller,
* there might be an additional MAC address programmed to the MAC OTP fuses.
* Although the i.MX8MM has only one MAC, the MAC0, MAC1 and MAC2 registers
* in the OTP fuses can still be used to store two separate addresses.
* Try to read the secondary address from MAC1 and MAC2 and adjust the
* devicetree so Linux can pick up the MAC address.
*/
int fdt_set_usb_eth_addr(void *blob)
{
u32 value = readl(OCOTP_BASE_ADDR + 0x660);
unsigned char mac[6];
int node, ret;
mac[0] = value >> 24;
mac[1] = value >> 16;
mac[2] = value >> 8;
mac[3] = value;
value = readl(OCOTP_BASE_ADDR + 0x650);
mac[4] = value >> 24;
mac[5] = value >> 16;
node = fdt_path_offset(blob, fdt_get_alias(blob, "ethernet1"));
if (node < 0) {
/*
* There is no node for the USB ethernet in the devicetree. Just skip.
*/
return 0;
}
if (is_zero_ethaddr(mac)) {
printf("\nNo MAC address for USB ethernet set in OTP fuses!\n");
return 0;
}
if (!is_valid_ethaddr(mac)) {
printf("\nInvalid MAC address for USB ethernet set in OTP fuses!\n");
return -EINVAL;
}
ret = fdt_setprop(blob, node, "local-mac-address", &mac, 6);
if (ret)
ret = fdt_setprop(blob, node, "mac-address", &mac, 6);
if (ret)
printf("\nMissing mac-address or local-mac-address property in dt, skip setting MAC address for USB ethernet\n");
return 0;
}
int ft_board_setup(void *blob, struct bd_info *bd)
{
int ret = fdt_set_usb_eth_addr(blob);
if (ret)
return ret;
return fdt_fixup_memory(blob, PHYS_SDRAM, gd->ram_size);
}
int board_init(void)
{
return 0;
}
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