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/*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#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 <southbridge/intel/bd82x6x/pch.h>
#include <vendorcode/google/chromeos/fmap.h>
#include "onboard.h"
static unsigned int search(char *p, char *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(char *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, (unsigned char)*offset);
retval = 0;
}
return retval;
}
static int get_mac_address(u32 *high_dword, u32 *low_dword,
u32 search_address, u32 search_length)
{
char key[] = "ethernet_mac";
unsigned int offset;
int i;
offset = search(key, (char *)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((char *)(search_address + offset))
<< (4 + (i * 8)));
*high_dword |= (get_hex_digit((char *)(search_address + offset + 1))
<< (i * 8));
offset += 3;
}
*low_dword = 0;
for (i = 0; i < 2; i++) {
*low_dword |= (get_hex_digit((char *)(search_address + offset))
<< (4 + (i * 8)));
*low_dword |= (get_hex_digit((char *)(search_address + offset + 1))
<< (i * 8));
offset += 3;
}
return *high_dword | *low_dword;
}
static void program_mac_address(u16 io_base, u32 search_address,
u32 search_length)
{
/* 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 (search_length != -1)
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");
outb(0xc0, io_base + 0x50); /* Disable register protection */
outl(high_dword, io_base);
outl(low_dword, io_base + 0x04);
outb(0x60, io_base + 54);
outb(0x00, io_base + 0x50); /* Enable register protection again */
}
}
void lan_init(void)
{
u32 search_address = 0;
size_t search_length = -1;
u16 io_base = 0;
struct device *ethernet_dev = NULL;
#if CONFIG_CHROMEOS
char **vpd_region_ptr = NULL;
search_length = find_fmap_entry("RO_VPD", (void **)vpd_region_ptr);
search_address = (unsigned long)(*vpd_region_ptr);
#else
void *vpd_file = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, "vpd.bin",
CBFS_TYPE_RAW, &search_length);
if (vpd_file) {
search_address = (unsigned long)vpd_file;
} else {
search_length = -1;
search_address = 0;
}
#endif
/* Get NIC's IO base address */
ethernet_dev = dev_find_device(PANTHER_NIC_VENDOR_ID,
PANTHER_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, search_address, search_length);
/*
* 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((PANTHER_NIC_LED_MODE << 6) | 0x0f, io_base + 0x52);
outb(0x00, io_base + 0x50); /* Enable register protection */
}
}
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