| Frieder Schrempf | 199dfd9 | 2021-09-29 16:42:42 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright (C) 2019 Kontron Electronics GmbH |
| 4 | */ |
| 5 | |
| 6 | #include <asm/arch/imx-regs.h> |
| 7 | #include <asm/global_data.h> |
| 8 | #include <asm/io.h> |
| 9 | #include <fdt_support.h> |
| 10 | #include <linux/errno.h> |
| 11 | #include <net.h> |
| 12 | |
| 13 | DECLARE_GLOBAL_DATA_PTR; |
| 14 | |
| 15 | int board_phys_sdram_size(phys_size_t *size) |
| 16 | { |
| 17 | u32 ddr_size = readl(M4_BOOTROM_BASE_ADDR); |
| 18 | |
| 19 | if (ddr_size == 4) { |
| 20 | *size = 0x100000000; |
| 21 | } else if (ddr_size == 3) { |
| 22 | *size = 0xc0000000; |
| 23 | } else if (ddr_size == 2) { |
| 24 | *size = 0x80000000; |
| 25 | } else if (ddr_size == 1) { |
| 26 | *size = 0x40000000; |
| 27 | } else { |
| 28 | printf("Unknown DDR type!!!\n"); |
| 29 | *size = 0x40000000; |
| 30 | } |
| 31 | |
| 32 | return 0; |
| 33 | } |
| 34 | |
| 35 | /* |
| 36 | * If the SoM is mounted on a baseboard with a USB ethernet controller, |
| 37 | * there might be an additional MAC address programmed to the MAC OTP fuses. |
| 38 | * Although the i.MX8MM has only one MAC, the MAC0, MAC1 and MAC2 registers |
| 39 | * in the OTP fuses can still be used to store two separate addresses. |
| 40 | * Try to read the secondary address from MAC1 and MAC2 and adjust the |
| 41 | * devicetree so Linux can pick up the MAC address. |
| 42 | */ |
| 43 | int fdt_set_usb_eth_addr(void *blob) |
| 44 | { |
| 45 | u32 value = readl(OCOTP_BASE_ADDR + 0x660); |
| 46 | unsigned char mac[6]; |
| 47 | int node, ret; |
| 48 | |
| 49 | mac[0] = value >> 24; |
| 50 | mac[1] = value >> 16; |
| 51 | mac[2] = value >> 8; |
| 52 | mac[3] = value; |
| 53 | |
| 54 | value = readl(OCOTP_BASE_ADDR + 0x650); |
| 55 | mac[4] = value >> 24; |
| 56 | mac[5] = value >> 16; |
| 57 | |
| 58 | node = fdt_path_offset(blob, fdt_get_alias(blob, "ethernet1")); |
| 59 | if (node < 0) { |
| 60 | /* |
| 61 | * There is no node for the USB ethernet in the devicetree. Just skip. |
| 62 | */ |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | if (is_zero_ethaddr(mac)) { |
| 67 | printf("\nNo MAC address for USB ethernet set in OTP fuses!\n"); |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | if (!is_valid_ethaddr(mac)) { |
| 72 | printf("\nInvalid MAC address for USB ethernet set in OTP fuses!\n"); |
| 73 | return -EINVAL; |
| 74 | } |
| 75 | |
| 76 | ret = fdt_setprop(blob, node, "local-mac-address", &mac, 6); |
| 77 | if (ret) |
| 78 | ret = fdt_setprop(blob, node, "mac-address", &mac, 6); |
| 79 | |
| 80 | if (ret) |
| 81 | printf("\nMissing mac-address or local-mac-address property in dt, skip setting MAC address for USB ethernet\n"); |
| 82 | |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | int ft_board_setup(void *blob, struct bd_info *bd) |
| 87 | { |
| 88 | int ret = fdt_set_usb_eth_addr(blob); |
| 89 | |
| 90 | if (ret) |
| 91 | return ret; |
| 92 | |
| 93 | return fdt_fixup_memory(blob, PHYS_SDRAM, gd->ram_size); |
| 94 | } |
| 95 | |
| 96 | int board_init(void) |
| 97 | { |
| 98 | return 0; |
| 99 | } |