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/* 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 <variant/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(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(SUMO_NIC_VENDOR_ID,
SUMO_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((SUMO_NIC_LED_MODE << 6) | 0x0f, io_base + 0x52);
outb(0x00, io_base + 0x50); /* Enable register protection */
}
}
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