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/*
* 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);
}
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