1 files changed, 56 insertions, 0 deletions
diff --git a/src/southbridge/via/k8t890/k8t890_early_car.c b/src/southbridge/via/k8t890/k8t890_early_car.c
new file mode 100644
index 000000000000..d66801e7e55b
--- /dev/null
+++ b/src/southbridge/via/k8t890/k8t890_early_car.c
@@ -0,0 +1,56 @@
+/*
+ * This file is part of the LinuxBIOS 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
+ */
+
+/*
+ * Seems the link and width of HT link needs to be setup too, you need to
+ * generate PCI reset or LDTSTOP to apply.
+ */
+
+u8 k8t890_early_setup_car(u8 width, u8 speed)
+{
+	u8 awidth, aspeed;
+
+	print_debug("LDT width and speed for K8T890 was");
+	awidth = pci_read_config8(PCI_DEV(0, 0x0, 0), 0x67);
+	print_debug_hex8(awidth);
+
+	aspeed = pci_read_config8(PCI_DEV(0, 0x0, 0), 0x6d);
+	print_debug_hex8(aspeed);
+
+	if ((aspeed == speed) && (((width == 16) && (awidth == 0x11)) ||
+				  ((width == 8) && (awidth == 0x00))))
+		return 0;
+
+	/* Update the desired HT LNK capabilities in NB too. */
+	pci_write_config8(PCI_DEV(0, 0x0, 0), 0x67,
+			  (width == 16) ? 0x11 : 0x00);
+	pci_write_config8(PCI_DEV(0, 0x0, 0), 0x6d, speed);
+
+	print_debug(" and will after HT reset: ");
+
+	awidth = pci_read_config8(PCI_DEV(0, 0x0, 0), 0x67);
+	print_debug_hex8(awidth);
+
+	aspeed = pci_read_config8(PCI_DEV(0, 0x0, 0), 0x6d);
+	print_debug_hex8(aspeed);
+
+	print_debug("\n");
+
+	return 1;
+}