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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* This driver sets the macaddress of a Atheros AR8121/AR8113/AR8114
*/
#include <device/mmio.h>
#include <device/device.h>
#include <cbfs.h>
#include <console/console.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <types.h>
#define REG_SPI_FLASH_CTRL 0x200
#define SPI_FLASH_CTRL_EN_VPD 0x2000
#define REG_PCIE_CAP_LIST 0x58
#define REG_MAC_STA_ADDR 0x1488
static u8 get_hex_digit(const u8 c)
{
u8 ret = 0;
ret = c - '0';
if (ret > 0x09) {
ret = c - 'A' + 0x0a;
if (ret > 0x0f)
ret = c - 'a' + 0x0a;
}
if (ret > 0x0f) {
printk(BIOS_ERR, "Error: Invalid hex digit found: "
"%c - 0x%02x\n", (char)c, c);
ret = 0;
}
return ret;
}
#define MACLEN 17
static enum cb_err fetch_mac_string_cbfs(u8 *macstrbuf)
{
if (!cbfs_load("atl1e-macaddress", macstrbuf, MACLEN)) {
printk(BIOS_ERR, "atl1e: Error reading MAC from CBFS\n");
return CB_ERR;
}
return CB_SUCCESS;
}
static void get_mac_address(u8 *macaddr, const u8 *strbuf)
{
size_t offset = 0;
int i;
if ((strbuf[2] != ':') || (strbuf[5] != ':') ||
(strbuf[8] != ':') || (strbuf[11] != ':') ||
(strbuf[14] != ':')) {
printk(BIOS_ERR, "atl1e: ignore invalid MAC address in cbfs\n");
return;
}
for (i = 0; i < 6; i++) {
macaddr[i] = 0;
macaddr[i] |= get_hex_digit(strbuf[offset]) << 4;
macaddr[i] |= get_hex_digit(strbuf[offset + 1]);
offset += 3;
}
}
static void program_mac_address(u32 mem_base)
{
u8 macstrbuf[MACLEN] = { 0 };
/* Default MAC Address of 90:e6:ba:24:f9:d2 */
u8 mac[6] = { 0x90, 0xe6, 0xba, 0x24, 0xf9, 0xd2 };
u32 value;
if (fetch_mac_string_cbfs(macstrbuf) != CB_SUCCESS) {
printk(BIOS_ERR, "atl1e: Error reading MAC from CBFS,"
" using default 90:e6:ba:24:f9:d2\n");
} else {
get_mac_address(mac, macstrbuf);
}
printk(BIOS_DEBUG, "atl1e: Programming MAC Address...");
value = (mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | (mac[5] << 0);
write32((void *)mem_base + REG_MAC_STA_ADDR, value);
value = (mac[0] << 8) | (mac[1] << 0);
write32((void *)mem_base + REG_MAC_STA_ADDR + 4, value);
printk(BIOS_DEBUG, "done\n");
}
static int atl1e_eeprom_exist(u32 mem_base)
{
u32 value = read32((void *)mem_base + REG_SPI_FLASH_CTRL);
if (value & SPI_FLASH_CTRL_EN_VPD) {
value &= ~SPI_FLASH_CTRL_EN_VPD;
write32((void *)mem_base + REG_SPI_FLASH_CTRL, value);
}
value = read32((void *)mem_base + REG_PCIE_CAP_LIST);
return ((value & 0xff00) == 0x6c00) ? 1 : 0;
}
static void atl1e_init(struct device *dev)
{
/* Get the resource of the NIC mmio */
struct resource *nic_res = find_resource(dev, PCI_BASE_ADDRESS_0);
if (nic_res == NULL) {
printk(BIOS_ERR, "atl1e: resource not found\n");
return;
}
u32 mem_base = nic_res->base;
if (!mem_base) {
printk(BIOS_ERR, "atl1e: resource not assigned\n");
return;
}
if (atl1e_eeprom_exist(mem_base)) {
printk(BIOS_INFO, "atl1e NIC has SPI eeprom, not setting MAC\n");
return;
}
/* Check if the base is invalid */
if (!mem_base) {
printk(BIOS_ERR, "atl1e: Error can't find MEM resource\n");
return;
}
/* Enable but do not set bus master */
pci_write_config16(dev, PCI_COMMAND,
PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
/* Program MAC address based on CBFS "macaddress" containing
* a string AA:BB:CC:DD:EE:FF */
program_mac_address(mem_base);
}
static struct device_operations atl1e_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = atl1e_init,
};
static const struct pci_driver atl1e_driver __pci_driver = {
.ops = &atl1e_ops,
.vendor = 0x1969,
.device = 0x1026,
};
struct chip_operations drivers_net_ops = {
CHIP_NAME("Atheros AR8121/AR8113/AR8114")
};
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