viatool: Add utility to read various configuration bits on VIA systems

viatool is a utility for extracting useful for extracting certain configuration
bits on VIA chipsets and CPUs. It is a fork of inteltool.

viatool is currently focused on "quirks". Quirks are device configurations that
cannot be accessed directly. They are implemented as hierarchical configurations
in the PCI or memory address spaces (index/data register pairs). Such
configurations refer to hardware parameters that are board specific. Those
parameters would otherwise be difficult to extract from a system running the
vendor's firmware.

viatool also preserves inteltool's MSR dumps. VIA CPU and Intel CPU MSRs are
nearly identical.

Change-Id: Icbd39eaf7c7da5568732d77dbf2aed135f835754
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/1430
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 118 insertions, 0 deletions

diff --git a/util/viatool/quirks/quirks.c b/util/viatool/quirks/quirks.c
new file mode 100644
index 0000000000..c1bd33204f
--- /dev/null
+++ b/util/viatool/quirks/quirks.c
@@ -0,0 +1,118 @@
+/*
+ * viatool - dump all registers on a VIA CPU + chipset based system.
+ *
+ * Copyright (C) 2013 Alexandru Gagniuc
+ *
+ * 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
+ * a long with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "quirks.h"
+#include <viatool.h>
+#include <stdio.h>
+#include <stddef.h>
+
+extern struct quirk_list vx900_sb_quirk_list;
+
+struct quirk_list *sb_quirks[] = {
+	&vx900_sb_quirk_list,
+	0,
+};
+
+struct quirk_list *nb_quirks[] = {
+	0,
+};
+
+int print_quirks(struct pci_dev *sb, struct pci_access *pacc,
+		 struct quirk_list **qlists);
+
+int print_quirks_north(struct pci_dev *nb, struct pci_access *pacc)
+{
+	printf("\n====== Northbridge Quirks =======\n\n");
+	return print_quirks(nb, pacc, nb_quirks);
+}
+
+int print_quirks_south(struct pci_dev *sb, struct pci_access *pacc)
+{
+	printf("\n====== Southbridge Quirks =======\n\n");
+	return print_quirks(sb, pacc, sb_quirks);
+}
+
+int print_quirks(struct pci_dev *sb, struct pci_access *pacc,
+		 struct quirk_list **qlists)
+{
+	size_t i, j;
+	struct quirk *q;
+	struct quirk_list *qlist;
+	struct pci_dev *dev;
+
+	for (i = 0; ; i++)
+	{
+		qlist = qlists[i];
+
+		if (qlist == NULL) {
+			/* OOPS. We've tried all we know, but no quirk */
+			printf("No quirks supported.\n");
+			break;
+		}
+
+		/* Is this the right device ? */
+		if ( (qlist->pci_vendor_id != sb->vendor_id) ||
+			qlist->pci_device_id != sb->device_id)
+			continue;
+
+		for (j = 0; ; j++)
+		{
+			q = &qlist->dev_quirks[j];
+
+			if(q->pci_device_id == 0)
+				break;
+
+			printf("Probing PCI device %i:%.2x.%i\n",
+			       q->pci_bus, q->pci_dev, q->pci_func);
+
+			dev = pci_get_dev(pacc, q->pci_domain, q->pci_bus,
+					  q->pci_dev, q->pci_func);
+
+			if (!dev) {
+				perror("Error: no device found\n");
+				continue;
+			}
+
+			pci_fill_info(dev, PCI_FILL_IDENT |
+					   PCI_FILL_BASES |
+					   PCI_FILL_SIZES |
+					   PCI_FILL_CLASS );
+
+			if (dev->device_id != q->pci_device_id) {
+				printf("Expected %.4x:%.4x, got %.4x:%.4x\n",
+				       q->pci_vendor_id, q->pci_device_id,
+				       dev->vendor_id, dev->device_id);
+				continue;
+			}
+
+			if (!q->quirk_func) {
+				perror("BUG: Quirk missing.\n");
+				continue;
+			}
+
+			q->quirk_func(dev);
+			/* On to next quirk */
+		}
+
+		/* Done. No need to go through the remainder of the list */
+		break;
+	}
+
+	return 0;
+}