1 files changed, 61 insertions, 0 deletions
diff --git a/src/southbridge/nvidia/ck804/usb.c b/src/southbridge/nvidia/ck804/usb.c
new file mode 100644
index 0000000000..45ee734eb1
--- /dev/null
+++ b/src/southbridge/nvidia/ck804/usb.c
@@ -0,0 +1,61 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2004 Tyan Computer
+ * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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 <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include "ck804.h"
+
+static void usb1_init(struct device *dev)
+{
+	struct southbridge_nvidia_ck804_config const *conf = dev->chip_info;
+	if (conf->usb1_hc_reset) {
+		/*
+		 * Somehow the warm reset does not really reset the USB
+		 * controller. Later, during boot, when the Bus Master bit is
+		 * set, the USB controller trashes the memory, causing weird
+		 * misbehavior. Was detected on Sun Ultra40, where mptable
+		 * was damaged.
+		 */
+		uint32_t bar0 = pci_read_config32(dev, 0x10);
+		uint32_t *regs = (uint32_t *) (bar0 & ~0xfff);
+
+		/* OHCI USB HCCommandStatus Register, HostControllerReset bit */
+		regs[2] |= 1;
+	}
+}
+
+static struct device_operations usb_ops = {
+	.read_resources   = pci_dev_read_resources,
+	.set_resources    = pci_dev_set_resources,
+	.enable_resources = pci_dev_enable_resources,
+	.init             = usb1_init,
+	// .enable        = ck804_enable,
+	.scan_bus         = 0,
+	.ops_pci          = &ck804_pci_ops,
+};
+
+static const struct pci_driver usb_driver __pci_driver = {
+	.ops    = &usb_ops,
+	.vendor = PCI_VENDOR_ID_NVIDIA,
+	.device = PCI_DEVICE_ID_NVIDIA_CK804_USB,
+};