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Diffstat (limited to 'src/mainboard/google/tidus/lan.c')
| -rw-r--r-- | src/mainboard/google/tidus/lan.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/mainboard/google/tidus/lan.c b/src/mainboard/google/tidus/lan.c new file mode 100644 index 0000000000..7c03f6c25e --- /dev/null +++ b/src/mainboard/google/tidus/lan.c @@ -0,0 +1,191 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Google Inc. + * + * 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 <cbfs.h> +#include <string.h> +#include <types.h> +#include <arch/io.h> +#include <console/console.h> +#include <device/device.h> +#include <device/pci.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 (IS_ENABLED(CONFIG_CHROMEOS)) { + 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_boot_map_with_leak("vpd.bin", + CBFS_TYPE_RAW, + &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(TIDUS_NIC_VENDOR_ID, + TIDUS_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((TIDUS_NIC_LED_MODE << 6) | 0x0f, io_base + 0x52); + outb(0x00, io_base + 0x50); /* Enable register protection */ + } +} |