trogdor: Add mainboard USB support

Change-Id: I126d1d6b582ea95c97ac55784d44d3081aabdae7
Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36232
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/mainboard/google/trogdor/mainboard.c

@@ -18,10 +18,22 @@
 #include <device/mmio.h>
 #include <gpio.h>
 #include <timestamp.h>
+#include <soc/usb.h>
+
+static struct usb_board_data usb0_board_data = {
+	.pll_bias_control_2 = 0x22,
+	.imp_ctrl1 = 0x08,
+	.port_tune1 = 0xc5,
+};
+
+static void setup_usb(void)
+{
+	setup_usb_host0(&usb0_board_data);
+}
 
 static void mainboard_init(struct device *dev)
 {
-
+	setup_usb();
 }
 
 static void mainboard_enable(struct device *dev)

src/mainboard/google/trogdor/romstage.c

@@ -14,10 +14,22 @@
  */
 
 #include <arch/stages.h>
+#include <soc/usb.h>
 #include <soc/qclib_common.h>
 
+static void prepare_usb(void)
+{
+	/*
+	 * Do DWC3 core and phy reset. Kick these resets
+	 * off early so they get at least 1ms to settle.
+	 */
+	reset_usb0();
+}
+
 void platform_romstage_main(void)
 {
+	prepare_usb();
+
 	/* QCLib: DDR init & train */
 	qclib_load_and_run();
 }