Following patch adds K8M890 support. It initializes the AGP and graphics UMA.

The V-link setup and HT bridge is redone, because VT8237A has it in another
device. So far following combination of chipsets should now work:

K8T890CE + VT8237R
K8M890(CE) + VT8237R

VIA PC1 brige moved to NB code (vt8237r_bridge.c -> k8t890_bridge.c) and
notes about K8M890 support were added.

Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3183 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 63 insertions, 0 deletions

diff --git a/src/southbridge/via/k8t890/k8t890_bridge.c b/src/southbridge/via/k8t890/k8t890_bridge.c
new file mode 100644
index 0000000000..be1ba721ef
--- /dev/null
+++ b/src/southbridge/via/k8t890/k8t890_bridge.c
@@ -0,0 +1,63 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License v2 as published by
+ * the Free Software Foundation.
+ *
+ * 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 <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <console/console.h>
+
+static void bridge_enable(struct device *dev)
+{
+	print_debug("B188 device dump\n");
+
+	/* VIA recommends this, sorry no known info. */
+
+	writeback(dev, 0x40, 0x91);
+	writeback(dev, 0x41, 0x40);
+	writeback(dev, 0x43, 0x44);
+	writeback(dev, 0x44, 0x31); 	/* K8M890 should have 0x35 datasheet 
+					 * says it is reserved 
+					 */
+	writeback(dev, 0x45, 0x3a);
+	writeback(dev, 0x46, 0x88);	/* PCI ID lo */
+	writeback(dev, 0x47, 0xb1);	/* PCI ID hi */
+
+	/* Bridge control, K8M890 bit 3 should be set to enable VGA on AGP 
+	 * (Forward VGA compatible memory and I/O cycles )
+	 */
+
+	writeback(dev, 0x3e, 0x16);
+	dump_south(dev);
+}
+
+static const struct device_operations bridge_ops = {
+	.read_resources		= pci_bus_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= pci_bus_enable_resources,
+	.enable			= bridge_enable,
+	.scan_bus		= pci_scan_bridge,
+	.reset_bus		= pci_bus_reset,
+	.ops_pci		= 0,
+};
+
+static const struct pci_driver northbridge_driver __pci_driver = {
+	.ops	= &bridge_ops,
+	.vendor	= PCI_VENDOR_ID_VIA,
+	.device	= PCI_DEVICE_ID_VIA_K8T890CE_BR,
+};