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https://github.com/AsahiLinux/u-boot
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9cab87f184
The Kontron SoM-Line i.MX8MM (N801x) by Kontron Electronics GmbH is a SoM module with an i.MX8M-Mini SoC, 1/2/4 GB LPDDR4 RAM, SPI NOR, eMMC and PMIC. The matching evaluation boards (Board-Line) have 2 Ethernets, USB 2.0, HDMI/LVDS, SD card, CAN, RS485 and much more. Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de> Reviewed-by: Stefano Babic <sbabic@denx.de> Tested-by: Heiko Thiery <heiko.thiery@gmail.com>
99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2019 Kontron Electronics GmbH
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*/
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#include <asm/arch/imx-regs.h>
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#include <asm/global_data.h>
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#include <asm/io.h>
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#include <fdt_support.h>
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#include <linux/errno.h>
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#include <net.h>
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DECLARE_GLOBAL_DATA_PTR;
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int board_phys_sdram_size(phys_size_t *size)
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{
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u32 ddr_size = readl(M4_BOOTROM_BASE_ADDR);
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if (ddr_size == 4) {
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*size = 0x100000000;
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} else if (ddr_size == 3) {
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*size = 0xc0000000;
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} else if (ddr_size == 2) {
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*size = 0x80000000;
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} else if (ddr_size == 1) {
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*size = 0x40000000;
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} else {
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printf("Unknown DDR type!!!\n");
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*size = 0x40000000;
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}
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return 0;
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}
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/*
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* If the SoM is mounted on a baseboard with a USB ethernet controller,
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* there might be an additional MAC address programmed to the MAC OTP fuses.
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* Although the i.MX8MM has only one MAC, the MAC0, MAC1 and MAC2 registers
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* in the OTP fuses can still be used to store two separate addresses.
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* Try to read the secondary address from MAC1 and MAC2 and adjust the
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* devicetree so Linux can pick up the MAC address.
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*/
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int fdt_set_usb_eth_addr(void *blob)
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{
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u32 value = readl(OCOTP_BASE_ADDR + 0x660);
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unsigned char mac[6];
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int node, ret;
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mac[0] = value >> 24;
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mac[1] = value >> 16;
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mac[2] = value >> 8;
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mac[3] = value;
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value = readl(OCOTP_BASE_ADDR + 0x650);
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mac[4] = value >> 24;
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mac[5] = value >> 16;
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node = fdt_path_offset(blob, fdt_get_alias(blob, "ethernet1"));
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if (node < 0) {
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/*
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* There is no node for the USB ethernet in the devicetree. Just skip.
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*/
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return 0;
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}
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if (is_zero_ethaddr(mac)) {
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printf("\nNo MAC address for USB ethernet set in OTP fuses!\n");
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return 0;
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}
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if (!is_valid_ethaddr(mac)) {
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printf("\nInvalid MAC address for USB ethernet set in OTP fuses!\n");
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return -EINVAL;
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}
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ret = fdt_setprop(blob, node, "local-mac-address", &mac, 6);
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if (ret)
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ret = fdt_setprop(blob, node, "mac-address", &mac, 6);
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if (ret)
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printf("\nMissing mac-address or local-mac-address property in dt, skip setting MAC address for USB ethernet\n");
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return 0;
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}
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int ft_board_setup(void *blob, struct bd_info *bd)
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{
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int ret = fdt_set_usb_eth_addr(blob);
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if (ret)
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return ret;
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return fdt_fixup_memory(blob, PHYS_SDRAM, gd->ram_size);
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}
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int board_init(void)
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{
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return 0;
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}
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