/* SPDX-License-Identifier: GPL-2.0-only */ #include <cbfs.h> #include <types.h> #include <arch/io.h> #include <device/pci_ops.h> #include <console/console.h> #include <device/device.h> #include <fmap.h> #include <southbridge/intel/bd82x6x/pch.h> #include "onboard.h" static unsigned int search(char *p, u8 *a, unsigned int lengthp, unsigned int lengtha) { int i, j; /* Searching */ for (j = 0; j <= lengtha - lengthp; j++) { for (i = 0; i < lengthp && p[i] == a[i + j]; i++) ; if (i >= lengthp) return j; } return lengtha; } static unsigned char get_hex_digit(u8 *offset) { unsigned char retval = 0; retval = *offset - '0'; if (retval > 0x09) { retval = *offset - 'A' + 0x0A; if (retval > 0x0F) retval = *offset - 'a' + 0x0a; } if (retval > 0x0F) { printk(BIOS_DEBUG, "Error: Invalid Hex digit found: %c - 0x%02x\n", *offset, *offset); retval = 0; } return retval; } static int get_mac_address(u32 *high_dword, u32 *low_dword, u8 *search_address, u32 search_length) { char key[] = "ethernet_mac"; unsigned int offset; int i; offset = search(key, search_address, sizeof(key) - 1, search_length); if (offset == search_length) { printk(BIOS_DEBUG, "Error: Could not locate '%s' in VPD\n", key); return 0; } printk(BIOS_DEBUG, "Located '%s' in VPD\n", key); offset += sizeof(key); /* move to next character */ *high_dword = 0; /* Fetch the MAC address and put the octets in the correct order to * be programmed. * * From RTL8105E_Series_EEPROM-Less_App_Note_1.1 * If the MAC address is 001122334455h: * Write 33221100h to I/O register offset 0x00 via double word access * Write 00005544h to I/O register offset 0x04 via double word access */ for (i = 0; i < 4; i++) { *high_dword |= (get_hex_digit(search_address + offset) << (4 + (i * 8))); *high_dword |= (get_hex_digit(search_address + offset + 1) << (i * 8)); offset += 3; } *low_dword = 0; for (i = 0; i < 2; i++) { *low_dword |= (get_hex_digit(search_address + offset) << (4 + (i * 8))); *low_dword |= (get_hex_digit(search_address + offset + 1) << (i * 8)); offset += 3; } return *high_dword | *low_dword; } static void program_mac_address(u16 io_base) { void *search_address = NULL; size_t search_length = -1; /* Default MAC Address of A0:00:BA:D0:0B:AD */ u32 high_dword = 0xD0BA00A0; /* high dword of mac address */ u32 low_dword = 0x0000AD0B; /* low word of mac address as a dword */ if (CONFIG(VPD)) { struct region_device rdev; if (fmap_locate_area_as_rdev("RO_VPD", &rdev) == 0) { search_address = rdev_mmap_full(&rdev); if (search_address != NULL) search_length = region_device_sz(&rdev); } } else { search_address = cbfs_map("vpd.bin", &search_length); } if (search_address == NULL) printk(BIOS_ERR, "LAN: VPD not found.\n"); else get_mac_address(&high_dword, &low_dword, search_address, search_length); if (io_base) { printk(BIOS_DEBUG, "Realtek NIC io_base = 0x%04x\n", io_base); printk(BIOS_DEBUG, "Programming MAC Address\n"); /* Disable register protection */ outb(0xc0, io_base + 0x50); outl(high_dword, io_base); outl(low_dword, io_base + 0x04); outb(0x60, io_base + 54); /* Enable register protection again */ outb(0x00, io_base + 0x50); } } void lan_init(void) { u16 io_base = 0; struct device *ethernet_dev = NULL; /* Get NIC's IO base address */ ethernet_dev = dev_find_device(NIC_VENDOR_ID, NIC_DEVICE_ID, 0); if (ethernet_dev != NULL) { io_base = pci_read_config16(ethernet_dev, 0x10) & 0xfffe; /* * Battery life time - LAN PCIe should enter ASPM L1 to save * power when LAN connection is idle. * enable CLKREQ: LAN pci config space 0x81h=01 */ pci_write_config8(ethernet_dev, 0x81, 0x01); } if (io_base) { /* Program MAC address based on VPD data */ program_mac_address(io_base); /* * Program NIC LEDS * * RTL8105E Series EEPROM-Less Application Note, * Section 5.6 LED Mode Configuration * * Step1: Write C0h to I/O register 0x50 via byte access to * disable 'register protection' * Step2: Write xx001111b to I/O register 0x52 via byte access * (bit7 is LEDS1 and bit6 is LEDS0) * Step3: Write 0x00 to I/O register 0x50 via byte access to * enable 'register protection' */ outb(0xc0, io_base + 0x50); /* Disable protection */ outb((NIC_LED_MODE << 6) | 0x0f, io_base + 0x52); outb(0x00, io_base + 0x50); /* Enable register protection */ } }