| /* 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 = probe_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") |
| }; |