usb: dwc3: ep0: make dwc3 ep0 build in uboot

*) Changed the included header files to that used in u-boot.
*) added dwc3_ep_event_string() used in ep0.c
*) Fixed other misc warnings

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>

drivers/usb/dwc3/core.h

@@ -840,6 +840,30 @@ struct dwc3_event_type {
 #define DWC3_DEPEVT_STREAMEVT		0x06
 #define DWC3_DEPEVT_EPCMDCMPLT		0x07
 
+/**
+ * dwc3_ep_event_string - returns event name
+ * @event: then event code
+ */
+static inline const char *dwc3_ep_event_string(u8 event)
+{
+	switch (event) {
+	case DWC3_DEPEVT_XFERCOMPLETE:
+		return "Transfer Complete";
+	case DWC3_DEPEVT_XFERINPROGRESS:
+		return "Transfer In-Progress";
+	case DWC3_DEPEVT_XFERNOTREADY:
+		return "Transfer Not Ready";
+	case DWC3_DEPEVT_RXTXFIFOEVT:
+		return "FIFO";
+	case DWC3_DEPEVT_STREAMEVT:
+		return "Stream";
+	case DWC3_DEPEVT_EPCMDCMPLT:
+		return "Endpoint Command Complete";
+	}
+
+	return "UNKNOWN";
+}
+
 /**
  * struct dwc3_event_depvt - Device Endpoint Events
  * @one_bit: indicates this is an endpoint event (not used)

drivers/usb/dwc3/ep0.c

@@ -15,24 +15,18 @@
  */
 
 #include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/platform_device.h>
-#include <linux/pm_runtime.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
 #include <linux/list.h>
-#include <linux/dma-mapping.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb/composite.h>
 
 #include "core.h"
-#include "debug.h"
 #include "gadget.h"
 #include "io.h"
 
+#include "linux-compat.h"
+
 static void __dwc3_ep0_do_control_status(struct dwc3 *dwc, struct dwc3_ep *dep);
 static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
 		struct dwc3_ep *dep, struct dwc3_request *req);
@@ -277,8 +271,6 @@ int __dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value)
 
 int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value)
 {
-	struct dwc3_ep			*dep = to_dwc3_ep(ep);
-	struct dwc3			*dwc = dep->dwc;
 	unsigned long			flags;
 	int				ret;
 
@@ -632,12 +624,10 @@ static int dwc3_ep0_set_sel(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
 	struct dwc3_ep	*dep;
 	enum usb_device_state state = dwc->gadget.state;
 	u16		wLength;
-	u16		wValue;
 
 	if (state == USB_STATE_DEFAULT)
 		return -EINVAL;
 
-	wValue = le16_to_cpu(ctrl->wValue);
 	wLength = le16_to_cpu(ctrl->wLength);
 
 	if (wLength != 6) {

drivers/usb/dwc3/linux-compat.h

@@ -14,6 +14,7 @@
 
 #define pr_debug(format)                debug(format)
 #define WARN(val, format, arg...)	debug(format, ##arg)
+#define dev_WARN(dev, format, arg...)	debug(format, ##arg)
 #define WARN_ON_ONCE(val)		debug("Error %d\n", val)
 
 #define BUILD_BUG_ON_NOT_POWER_OF_2(n)