1 files changed, 51 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/usbdebug.c b/src/soc/intel/skylake/usbdebug.c
new file mode 100644
index 0000000000..736a1a3c44
--- /dev/null
+++ b/src/soc/intel/skylake/usbdebug.c
@@ -0,0 +1,51 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google Inc.
+ *
+ * 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 <stdint.h>
+#include <arch/io.h>
+#include <console/console.h>
+#include <usbdebug.h>
+#include <device/pci.h>
+#include <device/pci_def.h>
+#include <soc/pci_devs.h>
+
+void set_debug_port(unsigned int port)
+{
+	/* Hardcoded to physical port 1 */
+}
+
+void enable_usbdebug(unsigned int port)
+{
+	u32 tmp32;
+
+	tmp32 = pci_read_config32(PCH_DEV_EHCI, PCI_VENDOR_ID);
+	if (tmp32 == 0xffffffff || tmp32 == 0)
+		return;
+
+	/* Set the EHCI BAR address. */
+	pci_write_config32(PCH_DEV_EHCI, EHCI_BAR_INDEX, CONFIG_EHCI_BAR);
+
+	/* Enable access to the EHCI memory space registers. */
+	pci_write_config8(PCH_DEV_EHCI, PCI_COMMAND, PCI_COMMAND_MEMORY);
+
+	/* Force ownership of the Debug Port to the EHCI controller. */
+	tmp32 = read32(CONFIG_EHCI_BAR + CONFIG_EHCI_DEBUG_OFFSET);
+	tmp32 |= (1 << 30);
+	write32(CONFIG_EHCI_BAR + CONFIG_EHCI_DEBUG_OFFSET, tmp32);
+}