| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2016 Google Inc. |
| * Copyright (C) 2017 Siemens AG |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <device/device.h> |
| #include <console/console.h> |
| #include <string.h> |
| #include <hwilib.h> |
| #include <i210.h> |
| |
| #define MAX_PATH_DEPTH 12 |
| #define MAX_NUM_MAPPINGS 10 |
| |
| /** \brief This function can decide if a given MAC address is valid or not. |
| * Currently, addresses filled with 0xff or 0x00 are not valid. |
| * @param mac Buffer to the MAC address to check |
| * @return 0 if address is not valid, otherwise 1 |
| */ |
| static uint8_t is_mac_adr_valid(uint8_t mac[6]) |
| { |
| uint8_t buf[6]; |
| |
| memset(buf, 0, sizeof(buf)); |
| if (!memcmp(buf, mac, sizeof(buf))) |
| return 0; |
| memset(buf, 0xff, sizeof(buf)); |
| if (!memcmp(buf, mac, sizeof(buf))) |
| return 0; |
| return 1; |
| } |
| |
| /** \brief This function will search for a MAC address which can be assigned |
| * to a MACPHY. |
| * @param dev pointer to PCI device |
| * @param mac buffer where to store the MAC address |
| * @return cb_err CB_ERR or CB_SUCCESS |
| */ |
| enum cb_err mainboard_get_mac_address(struct device *dev, uint8_t mac[6]) |
| { |
| struct bus *parent = dev->bus; |
| uint8_t buf[16], mapping[16], i = 0, chain_len = 0; |
| |
| memset(buf, 0, sizeof(buf)); |
| memset(mapping, 0, sizeof(mapping)); |
| |
| /* The first entry in the tree is the device itself. */ |
| buf[0] = dev->path.pci.devfn; |
| chain_len = 1; |
| for (i = 1; i < MAX_PATH_DEPTH && parent->dev->bus->subordinate; i++) { |
| buf[i] = parent->dev->path.pci.devfn; |
| chain_len++; |
| parent = parent->dev->bus; |
| } |
| if (i == MAX_PATH_DEPTH) { |
| /* The path is deeper than MAX_PATH_DEPTH devices, error. */ |
| printk(BIOS_ERR, "Too many bridges for %s\n", dev_path(dev)); |
| return CB_ERR; |
| } |
| /* |
| * Now construct the mapping based on the device chain starting from |
| * root bridge device to the device itself. |
| */ |
| mapping[0] = 1; |
| mapping[1] = chain_len; |
| for (i = 0; i < chain_len; i++) |
| mapping[i + 4] = buf[chain_len - i - 1]; |
| |
| /* Open main hwinfo block */ |
| if (hwilib_find_blocks("hwinfo.hex") != CB_SUCCESS) |
| return CB_ERR; |
| /* Now try to find a valid MAC address in hwinfo for this mapping.*/ |
| for (i = 0; i < MAX_NUM_MAPPINGS; i++) { |
| if ((hwilib_get_field(XMac1Mapping + i, buf, 16) == 16) && |
| !(memcmp(buf, mapping, chain_len + 4))) { |
| /* There is a matching mapping available, get MAC address. */ |
| if ((hwilib_get_field(XMac1 + i, mac, 6) == 6) && |
| (is_mac_adr_valid(mac))) { |
| return CB_SUCCESS; |
| } else { |
| return CB_ERR; |
| } |
| } else |
| continue; |
| } |
| /* No MAC address found for */ |
| return CB_ERR; |
| } |
| |
| static void mainboard_init(void *chip_info) |
| { |
| /* Nothing Here Yet */ |
| } |
| |
| struct chip_operations mainboard_ops = { |
| .init = mainboard_init, |
| }; |