2 * This file is part of the LinuxBIOS project.
4 * Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License v2 as published by
8 * the Free Software Foundation.
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.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include <console/console.h>
21 #include <device/device.h>
22 #include <device/pci.h>
23 #include <device/pci_ids.h>
25 #define SATA_MISC_CTRL 0x45
27 static void sata_init(struct device *dev)
31 printk_debug("Configuring VIA SATA controller\n");
34 reg = pci_read_config8(dev, SATA_MISC_CTRL);
35 reg &= 0x7f; /* Sub Class Write Protect off */
36 pci_write_config8(dev, SATA_MISC_CTRL, reg);
38 /* Change the device class to SATA from RAID. */
39 pci_write_config8(dev, PCI_CLASS_DEVICE, 0x1);
40 reg |= 0x80; /* Sub Class Write Protect on */
41 pci_write_config8(dev, SATA_MISC_CTRL, reg);
44 static const struct device_operations sata_ops = {
45 .read_resources = pci_dev_read_resources,
46 .set_resources = pci_dev_set_resources,
47 .enable_resources = pci_dev_enable_resources,
53 static const struct pci_driver northbridge_driver __pci_driver = {
55 .vendor = PCI_VENDOR_ID_VIA,
56 .device = PCI_DEVICE_ID_VIA_VT6420_SATA,