| Damien Zammit | e983f0c | 2016-05-21 02:24:19 +1000 | [diff] [blame^] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2016 Damien Zammit <damien@zamaudio.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | /* |
| 17 | * This driver forces the 10ec:8168 device to reset so that it goes |
| 18 | * into a proper power state, also programs a default MAC address |
| 19 | * so that if the EEPROM/efuse is unconfigured it still has a default MAC. |
| 20 | */ |
| 21 | |
| 22 | #include <arch/io.h> |
| 23 | #include <device/device.h> |
| 24 | #include <device/pci.h> |
| 25 | #include <device/pci_ops.h> |
| 26 | #include <device/pci_def.h> |
| 27 | #include <delay.h> |
| 28 | #include <console/console.h> |
| 29 | |
| 30 | #define NIC_TIMEOUT 1000 |
| 31 | |
| 32 | #define CMD_REG 0x37 |
| 33 | #define CMD_REG_RESET 0x10 |
| 34 | |
| 35 | #define CFG_9346 0x50 |
| 36 | #define CFG_9346_LOCK 0x00 |
| 37 | #define CFG_9346_UNLOCK 0xc0 |
| 38 | |
| 39 | static void r8168_init(struct device *dev) |
| 40 | { |
| 41 | u32 i; |
| 42 | const u8 mac[6] = { 0x00, 0xe0, 0x4c, 0x00, 0xc0, 0xb0 }; |
| 43 | |
| 44 | /* Get the resource of the NIC mmio */ |
| 45 | struct resource *nic_res = find_resource(dev, PCI_BASE_ADDRESS_0); |
| 46 | u16 nic_port = (u16)nic_res->base; |
| 47 | |
| 48 | /* Set bus master */ |
| 49 | pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER |
| 50 | | PCI_COMMAND_MEMORY | PCI_COMMAND_IO); |
| 51 | |
| 52 | /* Reset NIC */ |
| 53 | printk(BIOS_DEBUG, "r8168: Resetting NIC..."); |
| 54 | outb(CMD_REG_RESET, nic_port + CMD_REG); |
| 55 | |
| 56 | i = 0; |
| 57 | /* Poll for reset, with 1s timeout */ |
| 58 | while (i < NIC_TIMEOUT && (inb(nic_port + CMD_REG) & CMD_REG_RESET)) { |
| 59 | udelay(1000); |
| 60 | if (++i >= NIC_TIMEOUT) |
| 61 | printk(BIOS_DEBUG, "timeout waiting for nic to reset\n"); |
| 62 | } |
| 63 | if (i < NIC_TIMEOUT) |
| 64 | printk(BIOS_DEBUG, "done\n"); |
| 65 | |
| 66 | /* Unlock config regs */ |
| 67 | outb(CFG_9346_UNLOCK, nic_port + CFG_9346); |
| 68 | |
| 69 | /* Set MAC address 00:e0:4c:00:c0:b0 |
| 70 | * NB: only 4-byte write accesses allowed |
| 71 | */ |
| 72 | outl(mac[4] | mac[5] << 8, nic_port + 4); |
| 73 | inl(nic_port + 4); |
| 74 | |
| 75 | outl(mac[0] | mac[1] << 8 | mac[2] << 16 | mac[3] << 24, nic_port); |
| 76 | inl(nic_port); |
| 77 | |
| 78 | /* Lock config regs */ |
| 79 | outb(CFG_9346_LOCK, nic_port + CFG_9346); |
| 80 | } |
| 81 | |
| 82 | static struct device_operations r8168_ops = { |
| 83 | .read_resources = pci_dev_read_resources, |
| 84 | .set_resources = pci_dev_set_resources, |
| 85 | .enable_resources = pci_dev_enable_resources, |
| 86 | .init = r8168_init, |
| 87 | .scan_bus = 0, |
| 88 | }; |
| 89 | |
| 90 | static const struct pci_driver r8168_driver __pci_driver = { |
| 91 | .ops = &r8168_ops, |
| 92 | .vendor = 0x10ec, |
| 93 | .device = 0x8168, |
| 94 | }; |