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Diffstat (limited to 'src/mainboard/google/panther/lan.c')
-rw-r--r--src/mainboard/google/panther/lan.c195
1 files changed, 195 insertions, 0 deletions
diff --git a/src/mainboard/google/panther/lan.c b/src/mainboard/google/panther/lan.c
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+++ b/src/mainboard/google/panther/lan.c
@@ -0,0 +1,195 @@
+/*
+ * 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 <types.h>
+#include <string.h>
+#include <arch/io.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <southbridge/intel/bd82x6x/pch.h>
+#if CONFIG_CHROMEOS
+#include <vendorcode/google/chromeos/fmap.h>
+#else
+#include <cbfs.h>
+#endif
+#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 */
+ }
+}