1 files changed, 32 insertions, 0 deletions
diff --git a/arch/x86/cpu/ivybridge/usb_xhci.c b/arch/x86/cpu/ivybridge/usb_xhci.c
new file mode 100644
index 0000000000..4a32a7eb31
--- /dev/null
+++ b/arch/x86/cpu/ivybridge/usb_xhci.c
@@ -0,0 +1,32 @@
+/*
+ * From Coreboot
+ * Copyright (C) 2008-2009 coresystems GmbH
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <asm/pci.h>
+#include <asm/arch/pch.h>
+
+void bd82x6x_usb_xhci_init(pci_dev_t dev)
+{
+	u32 reg32;
+
+	debug("XHCI: Setting up controller.. ");
+
+	/* lock overcurrent map */
+	reg32 = pci_read_config32(dev, 0x44);
+	reg32 |= 1;
+	pci_write_config32(dev, 0x44, reg32);
+
+	/* Enable clock gating */
+	reg32 = pci_read_config32(dev, 0x40);
+	reg32 &= ~((1 << 20) | (1 << 21));
+	reg32 |= (1 << 19) | (1 << 18) | (1 << 17);
+	reg32 |= (1 << 10) | (1 << 9) | (1 << 8);
+	reg32 |= (1 << 31); /* lock */
+	pci_write_config32(dev, 0x40, reg32);
+
+	debug("done.\n");
+}