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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Damien Zammit <damien@zamaudio.com>
*
* 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.
*/
/*
* This driver forces the 10ec:8168 device to reset so that it goes
* into a proper power state, also programs a default MAC address
* so that if the EEPROM/efuse is unconfigured it still has a default MAC.
*/
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/pci_def.h>
#include <delay.h>
#include <console/console.h>
#define NIC_TIMEOUT 1000
#define CMD_REG 0x37
#define CMD_REG_RESET 0x10
#define CFG_9346 0x50
#define CFG_9346_LOCK 0x00
#define CFG_9346_UNLOCK 0xc0
static void r8168_init(struct device *dev)
{
u32 i;
const u8 mac[6] = { 0x00, 0xe0, 0x4c, 0x00, 0xc0, 0xb0 };
/* Get the resource of the NIC mmio */
struct resource *nic_res = find_resource(dev, PCI_BASE_ADDRESS_0);
u16 nic_port = (u16)nic_res->base;
/* Ensble but do not set bus master. That's dangerous on a NIC. */
pci_write_config16(dev, PCI_COMMAND,
PCI_COMMAND_MEMORY | PCI_COMMAND_IO);
/* Reset NIC */
printk(BIOS_DEBUG, "r8168: Resetting NIC...");
outb(CMD_REG_RESET, nic_port + CMD_REG);
i = 0;
/* Poll for reset, with 1s timeout */
while (i < NIC_TIMEOUT && (inb(nic_port + CMD_REG) & CMD_REG_RESET)) {
udelay(1000);
if (++i >= NIC_TIMEOUT)
printk(BIOS_DEBUG, "timeout waiting for nic to reset\n");
}
if (i < NIC_TIMEOUT)
printk(BIOS_DEBUG, "done\n");
/* Unlock config regs */
outb(CFG_9346_UNLOCK, nic_port + CFG_9346);
/* Set MAC address 00:e0:4c:00:c0:b0
* NB: only 4-byte write accesses allowed
*/
outl(mac[4] | mac[5] << 8, nic_port + 4);
inl(nic_port + 4);
outl(mac[0] | mac[1] << 8 | mac[2] << 16 | mac[3] << 24, nic_port);
inl(nic_port);
/* Lock config regs */
outb(CFG_9346_LOCK, nic_port + CFG_9346);
}
static struct device_operations r8168_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = r8168_init,
.scan_bus = 0,
};
static const struct pci_driver r8168_driver __pci_driver = {
.ops = &r8168_ops,
.vendor = 0x10ec,
.device = 0x8168,
};
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