usbdebug: Unify Intel southbridge builds

EHCI controller enable is identical on the affected chipsets.

Change-Id: I91830b6f5144a70b158ec1ee40e9cba5fab3fbc9
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3424
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>

src/southbridge/intel/common/usb_debug.c

@@ -0,0 +1,50 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2009 coresystems GmbH
+ *
+ * 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
+ */
+
+#ifndef __PRE_RAM__
+#define __PRE_RAM__ // Use simple device model for this file even in ramstage
+#endif
+#include <stdint.h>
+#include <arch/io.h>
+#include <console/console.h>
+#include <usbdebug.h>
+#include <device/pci_def.h>
+
+/* Required for successful build, but currently empty. */
+void set_debug_port(unsigned int port)
+{
+	/* Not needed, the ICH* southbridges hardcode physical USB port 1. */
+}
+
+void enable_usbdebug(unsigned int port)
+{
+	u32 dbgctl;
+	device_t dev = PCI_DEV(0, 0x1d, 7); /* USB EHCI, D29:F7 */
+
+	/* Set the EHCI BAR address. */
+	pci_write_config32(dev, EHCI_BAR_INDEX, CONFIG_EHCI_BAR);
+
+	/* Enable access to the EHCI memory space registers. */
+	pci_write_config8(dev, PCI_COMMAND, PCI_COMMAND_MEMORY);
+
+	/* Force ownership of the Debug Port to the EHCI controller. */
+	dbgctl = read32(CONFIG_EHCI_BAR + CONFIG_EHCI_DEBUG_OFFSET);
+	dbgctl |= (1 << 30);
+	write32(CONFIG_EHCI_BAR + CONFIG_EHCI_DEBUG_OFFSET, dbgctl);
+}