1 files changed, 106 insertions, 0 deletions
diff --git a/util/superiotool/via.c b/util/superiotool/via.c
new file mode 100644
index 0000000000..604c41a14b
--- /dev/null
+++ b/util/superiotool/via.c
@@ -0,0 +1,106 @@
+/*
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#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);
+}