103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/*
|
|
* This file is part of the superiotool project.
|
|
*
|
|
* Copyright (C) 2009 Carl-Daniel Hailfinger
|
|
*
|
|
* 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; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "superiotool.h"
|
|
|
|
#define DEVICE_ID_VT82C686_REG 0xe0
|
|
#define DEVICE_REV_VT82C686_REG 0xe1
|
|
|
|
static const struct superio_registers reg_table[] = {
|
|
{0x3c, "VT82C686A/VT82C686B", {
|
|
{EOT}}},
|
|
{EOT}
|
|
};
|
|
|
|
static uint8_t vt82c686_conf = 0;
|
|
|
|
static int enter_conf_mode_via_vt82c686(void)
|
|
{
|
|
struct pci_dev *dev;
|
|
|
|
dev = pci_dev_find(0x1106, 0x0686);
|
|
if (!dev) {
|
|
if (verbose)
|
|
printf(" PCI device 1106:0686 not found.\n");
|
|
return 1;
|
|
}
|
|
|
|
vt82c686_conf = pci_read_byte(dev, 0x85);
|
|
if (verbose)
|
|
printf(" Super I/O %sabled, Super I/O configuration %sabled\n",
|
|
(vt82c686_conf & (1 << 0)) ? "en" : "dis",
|
|
(vt82c686_conf & (1 << 1)) ? "en" : "dis");
|
|
|
|
/* If the Super I/O is not enabled, skip it. */
|
|
if (!(vt82c686_conf & (1 << 0)))
|
|
return 1;
|
|
|
|
/* Enable Super I/O configuration mode. */
|
|
pci_write_byte(dev, 0x85, vt82c686_conf | (1 << 1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void exit_conf_mode_via_vt82c686(void)
|
|
{
|
|
struct pci_dev *dev;
|
|
|
|
dev = pci_dev_find(0x1106, 0x0686);
|
|
if (!dev) {
|
|
printf("Bug: PCI device 1106:0686 not found during shutdown.\n"
|
|
"Please report to coreboot@coreboot.org.\n");
|
|
return;
|
|
}
|
|
|
|
/* Restore (disable?) Super I/O configuration mode setting. */
|
|
pci_write_byte(dev, 0x85, vt82c686_conf);
|
|
}
|
|
|
|
void probe_idregs_via(uint16_t port)
|
|
{
|
|
uint16_t id;
|
|
uint8_t rev;
|
|
|
|
probing_for("VIA", "", port);
|
|
|
|
if (enter_conf_mode_via_vt82c686())
|
|
return;
|
|
|
|
id = regval(port, DEVICE_ID_VT82C686_REG);
|
|
rev = regval(port, DEVICE_REV_VT82C686_REG);
|
|
|
|
if (superio_unknown(reg_table, id)) {
|
|
if (verbose)
|
|
printf(NOTFOUND "id=0x%04x, rev=0x%02x\n", id, rev);
|
|
exit_conf_mode_via_vt82c686();
|
|
return;
|
|
}
|
|
|
|
printf("Found VIA %s (id=0x%04x, rev=0x%02x) at 0x%x\n",
|
|
get_superio_name(reg_table, id), id, rev, port);
|
|
chip_found = 1;
|
|
|
|
exit_conf_mode_via_vt82c686();
|
|
}
|
|
|
|
void print_via_chips(void)
|
|
{
|
|
print_vendor_chips("VIA", reg_table);
|
|
}
|