drivers/usb/dwc3/debug.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */
 /*
  * debug.h - DesignWare USB3 DRD Controller Debug Header
  *
  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
  *
  * Authors: Felipe Balbi <balbi@ti.com>,
  *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
  */

 #ifndef __DWC3_DEBUG_H
 #define __DWC3_DEBUG_H

 #include "core.h"

 /**
  * dwc3_gadget_ep_cmd_string - returns endpoint command string
  * @cmd: command code
  */
 static inline const char *
 dwc3_gadget_ep_cmd_string(u8 cmd)
 {
 	switch (cmd) {
 	case DWC3_DEPCMD_DEPSTARTCFG:
 		return "Start New Configuration";
 	case DWC3_DEPCMD_ENDTRANSFER:
 		return "End Transfer";
 	case DWC3_DEPCMD_UPDATETRANSFER:
 		return "Update Transfer";
 	case DWC3_DEPCMD_STARTTRANSFER:
 		return "Start Transfer";
 	case DWC3_DEPCMD_CLEARSTALL:
 		return "Clear Stall";
 	case DWC3_DEPCMD_SETSTALL:
 		return "Set Stall";
 	case DWC3_DEPCMD_GETEPSTATE:
 		return "Get Endpoint State";
 	case DWC3_DEPCMD_SETTRANSFRESOURCE:
 		return "Set Endpoint Transfer Resource";
 	case DWC3_DEPCMD_SETEPCONFIG:
 		return "Set Endpoint Configuration";
 	default:
 		return "UNKNOWN command";
 	}
 }

 /**
  * dwc3_gadget_generic_cmd_string - returns generic command string
  * @cmd: command code
  */
 static inline const char *
 dwc3_gadget_generic_cmd_string(u8 cmd)
 {
 	switch (cmd) {
 	case DWC3_DGCMD_SET_LMP:
 		return "Set LMP";
 	case DWC3_DGCMD_SET_PERIODIC_PAR:
 		return "Set Periodic Parameters";
 	case DWC3_DGCMD_XMIT_FUNCTION:
 		return "Transmit Function Wake Device Notification";
 	case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO:
 		return "Set Scratchpad Buffer Array Address Lo";
 	case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI:
 		return "Set Scratchpad Buffer Array Address Hi";
 	case DWC3_DGCMD_SELECTED_FIFO_FLUSH:
 		return "Selected FIFO Flush";
 	case DWC3_DGCMD_ALL_FIFO_FLUSH:
 		return "All FIFO Flush";
 	case DWC3_DGCMD_SET_ENDPOINT_NRDY:
 		return "Set Endpoint NRDY";
 	case DWC3_DGCMD_SET_ENDPOINT_PRIME:
 		return "Set Endpoint Prime";
 	case DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK:
 		return "Run SoC Bus Loopback Test";
 	default:
 		return "UNKNOWN";
 	}
 }

 /**
  * dwc3_gadget_link_string - returns link name
  * @link_state: link state code
  */
 static inline const char *
 dwc3_gadget_link_string(enum dwc3_link_state link_state)
 {
 	switch (link_state) {
 	case DWC3_LINK_STATE_U0:
 		return "U0";
 	case DWC3_LINK_STATE_U1:
 		return "U1";
 	case DWC3_LINK_STATE_U2:
 		return "U2";
 	case DWC3_LINK_STATE_U3:
 		return "U3";
 	case DWC3_LINK_STATE_SS_DIS:
 		return "SS.Disabled";
 	case DWC3_LINK_STATE_RX_DET:
 		return "RX.Detect";
 	case DWC3_LINK_STATE_SS_INACT:
 		return "SS.Inactive";
 	case DWC3_LINK_STATE_POLL:
 		return "Polling";
 	case DWC3_LINK_STATE_RECOV:
 		return "Recovery";
 	case DWC3_LINK_STATE_HRESET:
 		return "Hot Reset";
 	case DWC3_LINK_STATE_CMPLY:
 		return "Compliance";
 	case DWC3_LINK_STATE_LPBK:
 		return "Loopback";
 	case DWC3_LINK_STATE_RESET:
 		return "Reset";
 	case DWC3_LINK_STATE_RESUME:
 		return "Resume";
 	default:
 		return "UNKNOWN link state";
 	}
 }

 /**
  * dwc3_gadget_hs_link_string - returns highspeed and below link name
  * @link_state: link state code
  */
 static inline const char *
 dwc3_gadget_hs_link_string(enum dwc3_link_state link_state)
 {
 	switch (link_state) {
 	case DWC3_LINK_STATE_U0:
 		return "On";
 	case DWC3_LINK_STATE_U2:
 		return "Sleep";
 	case DWC3_LINK_STATE_U3:
 		return "Suspend";
 	case DWC3_LINK_STATE_SS_DIS:
 		return "Disconnected";
 	case DWC3_LINK_STATE_RX_DET:
 		return "Early Suspend";
 	case DWC3_LINK_STATE_RECOV:
 		return "Recovery";
 	case DWC3_LINK_STATE_RESET:
 		return "Reset";
 	case DWC3_LINK_STATE_RESUME:
 		return "Resume";
 	default:
 		return "UNKNOWN link state";
 	}
 }

 /**
  * dwc3_trb_type_string - returns TRB type as a string
  * @type: the type of the TRB
  */
 static inline const char *dwc3_trb_type_string(unsigned int type)
 {
 	switch (type) {
 	case DWC3_TRBCTL_NORMAL:
 		return "normal";
 	case DWC3_TRBCTL_CONTROL_SETUP:
 		return "setup";
 	case DWC3_TRBCTL_CONTROL_STATUS2:
 		return "status2";
 	case DWC3_TRBCTL_CONTROL_STATUS3:
 		return "status3";
 	case DWC3_TRBCTL_CONTROL_DATA:
 		return "data";
 	case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
 		return "isoc-first";
 	case DWC3_TRBCTL_ISOCHRONOUS:
 		return "isoc";
 	case DWC3_TRBCTL_LINK_TRB:
 		return "link";
 	default:
 		return "UNKNOWN";
 	}
 }

 static inline const char *dwc3_ep0_state_string(enum dwc3_ep0_state state)
 {
 	switch (state) {
 	case EP0_UNCONNECTED:
 		return "Unconnected";
 	case EP0_SETUP_PHASE:
 		return "Setup Phase";
 	case EP0_DATA_PHASE:
 		return "Data Phase";
 	case EP0_STATUS_PHASE:
 		return "Status Phase";
 	default:
 		return "UNKNOWN";
 	}
 }

 /**
  * dwc3_gadget_event_string - returns event name
  * @event: the event code
  */
 static inline const char *dwc3_gadget_event_string(char *str, size_t size,
 		const struct dwc3_event_devt *event)
 {
 	enum dwc3_link_state state = event->event_info & DWC3_LINK_STATE_MASK;

 	switch (event->type) {
 	case DWC3_DEVICE_EVENT_DISCONNECT:
 		snprintf(str, size, "Disconnect: [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	case DWC3_DEVICE_EVENT_RESET:
 		snprintf(str, size, "Reset [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	case DWC3_DEVICE_EVENT_CONNECT_DONE:
 		snprintf(str, size, "Connection Done [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
 		snprintf(str, size, "Link Change [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	case DWC3_DEVICE_EVENT_WAKEUP:
 		snprintf(str, size, "WakeUp [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	case DWC3_DEVICE_EVENT_SUSPEND:
 		snprintf(str, size, "Suspend [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	case DWC3_DEVICE_EVENT_SOF:
 		snprintf(str, size, "Start-Of-Frame [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
 		snprintf(str, size, "Erratic Error [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	case DWC3_DEVICE_EVENT_CMD_CMPL:
 		snprintf(str, size, "Command Complete [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	case DWC3_DEVICE_EVENT_OVERFLOW:
 		snprintf(str, size, "Overflow [%s]",
 				dwc3_gadget_link_string(state));
 		break;
 	default:
 		snprintf(str, size, "UNKNOWN");
 	}

 	return str;
 }

 /**
  * dwc3_ep_event_string - returns event name
  * @event: then event code
  */
 static inline const char *dwc3_ep_event_string(char *str, size_t size,
 		const struct dwc3_event_depevt *event, u32 ep0state)
 {
 	u8 epnum = event->endpoint_number;
 	size_t len;
 	int status;

 	len = scnprintf(str, size, "ep%d%s: ", epnum >> 1,
 			(epnum & 1) ? "in" : "out");

 	status = event->status;

 	switch (event->endpoint_event) {
 	case DWC3_DEPEVT_XFERCOMPLETE:
 		len += scnprintf(str + len, size - len,
 				"Transfer Complete (%c%c%c)",
 				status & DEPEVT_STATUS_SHORT ? 'S' : 's',
 				status & DEPEVT_STATUS_IOC ? 'I' : 'i',
 				status & DEPEVT_STATUS_LST ? 'L' : 'l');

 		if (epnum <= 1)
 			scnprintf(str + len, size - len, " [%s]",
 					dwc3_ep0_state_string(ep0state));
 		break;
 	case DWC3_DEPEVT_XFERINPROGRESS:
 		scnprintf(str + len, size - len,
 				"Transfer In Progress [%08x] (%c%c%c)",
 				event->parameters,
 				status & DEPEVT_STATUS_SHORT ? 'S' : 's',
 				status & DEPEVT_STATUS_IOC ? 'I' : 'i',
 				status & DEPEVT_STATUS_LST ? 'M' : 'm');
 		break;
 	case DWC3_DEPEVT_XFERNOTREADY:
 		len += scnprintf(str + len, size - len,
 				"Transfer Not Ready [%08x]%s",
 				event->parameters,
 				status & DEPEVT_STATUS_TRANSFER_ACTIVE ?
 				" (Active)" : " (Not Active)");

 		/* Control Endpoints */
 		if (epnum <= 1) {
 			int phase = DEPEVT_STATUS_CONTROL_PHASE(event->status);

 			switch (phase) {
 			case DEPEVT_STATUS_CONTROL_DATA:
 				scnprintf(str + len, size - len,
 						" [Data Phase]");
 				break;
 			case DEPEVT_STATUS_CONTROL_STATUS:
 				scnprintf(str + len, size - len,
 						" [Status Phase]");
 			}
 		}
 		break;
 	case DWC3_DEPEVT_RXTXFIFOEVT:
 		scnprintf(str + len, size - len, "FIFO");
 		break;
 	case DWC3_DEPEVT_STREAMEVT:
 		status = event->status;

 		switch (status) {
 		case DEPEVT_STREAMEVT_FOUND:
 			scnprintf(str + len, size - len, " Stream %d Found",
 					event->parameters);
 			break;
 		case DEPEVT_STREAMEVT_NOTFOUND:
 		default:
 			scnprintf(str + len, size - len, " Stream Not Found");
 			break;
 		}

 		break;
 	case DWC3_DEPEVT_EPCMDCMPLT:
 		scnprintf(str + len, size - len, "Endpoint Command Complete");
 		break;
 	default:
 		scnprintf(str + len, size - len, "UNKNOWN");
 	}

 	return str;
 }

 /**
  * dwc3_gadget_event_type_string - return event name
  * @event: the event code
  */
 static inline const char *dwc3_gadget_event_type_string(u8 event)
 {
 	switch (event) {
 	case DWC3_DEVICE_EVENT_DISCONNECT:
 		return "Disconnect";
 	case DWC3_DEVICE_EVENT_RESET:
 		return "Reset";
 	case DWC3_DEVICE_EVENT_CONNECT_DONE:
 		return "Connect Done";
 	case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
 		return "Link Status Change";
 	case DWC3_DEVICE_EVENT_WAKEUP:
 		return "Wake-Up";
 	case DWC3_DEVICE_EVENT_HIBER_REQ:
 		return "Hibernation";
 	case DWC3_DEVICE_EVENT_SUSPEND:
 		return "Suspend";
 	case DWC3_DEVICE_EVENT_SOF:
 		return "Start of Frame";
 	case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
 		return "Erratic Error";
 	case DWC3_DEVICE_EVENT_CMD_CMPL:
 		return "Command Complete";
 	case DWC3_DEVICE_EVENT_OVERFLOW:
 		return "Overflow";
 	default:
 		return "UNKNOWN";
 	}
 }

 static inline const char *dwc3_decode_event(char *str, size_t size, u32 event,
 		u32 ep0state)
 {
 	union dwc3_event evt;

 	memcpy(&evt, &event, sizeof(event));

 	if (evt.type.is_devspec)
 		return dwc3_gadget_event_string(str, size, &evt.devt);
 	else
 		return dwc3_ep_event_string(str, size, &evt.depevt, ep0state);
 }

 static inline const char *dwc3_ep_cmd_status_string(int status)
 {
 	switch (status) {
 	case -ETIMEDOUT:
 		return "Timed Out";
 	case 0:
 		return "Successful";
 	case DEPEVT_TRANSFER_NO_RESOURCE:
 		return "No Resource";
 	case DEPEVT_TRANSFER_BUS_EXPIRY:
 		return "Bus Expiry";
 	default:
 		return "UNKNOWN";
 	}
 }

 static inline const char *dwc3_gadget_generic_cmd_status_string(int status)
 {
 	switch (status) {
 	case -ETIMEDOUT:
 		return "Timed Out";
 	case 0:
 		return "Successful";
 	case 1:
 		return "Error";
 	default:
 		return "UNKNOWN";
 	}
 }


 #ifdef CONFIG_DEBUG_FS
 extern void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep);
 extern void dwc3_debugfs_remove_endpoint_dir(struct dwc3_ep *dep);
 extern void dwc3_debugfs_init(struct dwc3 *d);
 extern void dwc3_debugfs_exit(struct dwc3 *d);
 #else
 static inline void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep)
 {  }
 static inline void dwc3_debugfs_remove_endpoint_dir(struct dwc3_ep *dep)
 {  }
 static inline void dwc3_debugfs_init(struct dwc3 *d)
 {  }
 static inline void dwc3_debugfs_exit(struct dwc3 *d)
 {  }
 #endif
 #endif /* __DWC3_DEBUG_H */
	/* SPDX-License-Identifier: GPL-2.0 */
	/*
	* debug.h - DesignWare USB3 DRD Controller Debug Header
	*
	* Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
	*
	* Authors: Felipe Balbi <balbi@ti.com>,
	* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
	*/

	#ifndef __DWC3_DEBUG_H
	#define __DWC3_DEBUG_H

	#include "core.h"

	/**
	* dwc3_gadget_ep_cmd_string - returns endpoint command string
	* @cmd: command code
	*/
	static inline const char *
	dwc3_gadget_ep_cmd_string(u8 cmd)
	{
	switch (cmd) {
	case DWC3_DEPCMD_DEPSTARTCFG:
	return "Start New Configuration";
	case DWC3_DEPCMD_ENDTRANSFER:
	return "End Transfer";
	case DWC3_DEPCMD_UPDATETRANSFER:
	return "Update Transfer";
	case DWC3_DEPCMD_STARTTRANSFER:
	return "Start Transfer";
	case DWC3_DEPCMD_CLEARSTALL:
	return "Clear Stall";
	case DWC3_DEPCMD_SETSTALL:
	return "Set Stall";
	case DWC3_DEPCMD_GETEPSTATE:
	return "Get Endpoint State";
	case DWC3_DEPCMD_SETTRANSFRESOURCE:
	return "Set Endpoint Transfer Resource";
	case DWC3_DEPCMD_SETEPCONFIG:
	return "Set Endpoint Configuration";
	default:
	return "UNKNOWN command";
	}
	}

	/**
	* dwc3_gadget_generic_cmd_string - returns generic command string
	* @cmd: command code
	*/
	static inline const char *
	dwc3_gadget_generic_cmd_string(u8 cmd)
	{
	switch (cmd) {
	case DWC3_DGCMD_SET_LMP:
	return "Set LMP";
	case DWC3_DGCMD_SET_PERIODIC_PAR:
	return "Set Periodic Parameters";
	case DWC3_DGCMD_XMIT_FUNCTION:
	return "Transmit Function Wake Device Notification";
	case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO:
	return "Set Scratchpad Buffer Array Address Lo";
	case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI:
	return "Set Scratchpad Buffer Array Address Hi";
	case DWC3_DGCMD_SELECTED_FIFO_FLUSH:
	return "Selected FIFO Flush";
	case DWC3_DGCMD_ALL_FIFO_FLUSH:
	return "All FIFO Flush";
	case DWC3_DGCMD_SET_ENDPOINT_NRDY:
	return "Set Endpoint NRDY";
	case DWC3_DGCMD_SET_ENDPOINT_PRIME:
	return "Set Endpoint Prime";
	case DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK:
	return "Run SoC Bus Loopback Test";
	default:
	return "UNKNOWN";
	}
	}

	/**
	* dwc3_gadget_link_string - returns link name
	* @link_state: link state code
	*/
	static inline const char *
	dwc3_gadget_link_string(enum dwc3_link_state link_state)
	{
	switch (link_state) {
	case DWC3_LINK_STATE_U0:
	return "U0";
	case DWC3_LINK_STATE_U1:
	return "U1";
	case DWC3_LINK_STATE_U2:
	return "U2";
	case DWC3_LINK_STATE_U3:
	return "U3";
	case DWC3_LINK_STATE_SS_DIS:
	return "SS.Disabled";
	case DWC3_LINK_STATE_RX_DET:
	return "RX.Detect";
	case DWC3_LINK_STATE_SS_INACT:
	return "SS.Inactive";
	case DWC3_LINK_STATE_POLL:
	return "Polling";
	case DWC3_LINK_STATE_RECOV:
	return "Recovery";
	case DWC3_LINK_STATE_HRESET:
	return "Hot Reset";
	case DWC3_LINK_STATE_CMPLY:
	return "Compliance";
	case DWC3_LINK_STATE_LPBK:
	return "Loopback";
	case DWC3_LINK_STATE_RESET:
	return "Reset";
	case DWC3_LINK_STATE_RESUME:
	return "Resume";
	default:
	return "UNKNOWN link state";
	}
	}

	/**
	* dwc3_gadget_hs_link_string - returns highspeed and below link name
	* @link_state: link state code
	*/
	static inline const char *
	dwc3_gadget_hs_link_string(enum dwc3_link_state link_state)
	{
	switch (link_state) {
	case DWC3_LINK_STATE_U0:
	return "On";
	case DWC3_LINK_STATE_U2:
	return "Sleep";
	case DWC3_LINK_STATE_U3:
	return "Suspend";
	case DWC3_LINK_STATE_SS_DIS:
	return "Disconnected";
	case DWC3_LINK_STATE_RX_DET:
	return "Early Suspend";
	case DWC3_LINK_STATE_RECOV:
	return "Recovery";
	case DWC3_LINK_STATE_RESET:
	return "Reset";
	case DWC3_LINK_STATE_RESUME:
	return "Resume";
	default:
	return "UNKNOWN link state";
	}
	}

	/**
	* dwc3_trb_type_string - returns TRB type as a string
	* @type: the type of the TRB
	*/
	static inline const char *dwc3_trb_type_string(unsigned int type)
	{
	switch (type) {
	case DWC3_TRBCTL_NORMAL:
	return "normal";
	case DWC3_TRBCTL_CONTROL_SETUP:
	return "setup";
	case DWC3_TRBCTL_CONTROL_STATUS2:
	return "status2";
	case DWC3_TRBCTL_CONTROL_STATUS3:
	return "status3";
	case DWC3_TRBCTL_CONTROL_DATA:
	return "data";
	case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
	return "isoc-first";
	case DWC3_TRBCTL_ISOCHRONOUS:
	return "isoc";
	case DWC3_TRBCTL_LINK_TRB:
	return "link";
	default:
	return "UNKNOWN";
	}
	}

	static inline const char *dwc3_ep0_state_string(enum dwc3_ep0_state state)
	{
	switch (state) {
	case EP0_UNCONNECTED:
	return "Unconnected";
	case EP0_SETUP_PHASE:
	return "Setup Phase";
	case EP0_DATA_PHASE:
	return "Data Phase";
	case EP0_STATUS_PHASE:
	return "Status Phase";
	default:
	return "UNKNOWN";
	}
	}

	/**
	* dwc3_gadget_event_string - returns event name
	* @event: the event code
	*/
	static inline const char dwc3_gadget_event_string(char str, size_t size,
	const struct dwc3_event_devt *event)
	{
	enum dwc3_link_state state = event->event_info & DWC3_LINK_STATE_MASK;

	switch (event->type) {
	case DWC3_DEVICE_EVENT_DISCONNECT:
	snprintf(str, size, "Disconnect: [%s]",
	dwc3_gadget_link_string(state));
	break;
	case DWC3_DEVICE_EVENT_RESET:
	snprintf(str, size, "Reset [%s]",
	dwc3_gadget_link_string(state));
	break;
	case DWC3_DEVICE_EVENT_CONNECT_DONE:
	snprintf(str, size, "Connection Done [%s]",
	dwc3_gadget_link_string(state));
	break;
	case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
	snprintf(str, size, "Link Change [%s]",
	dwc3_gadget_link_string(state));
	break;
	case DWC3_DEVICE_EVENT_WAKEUP:
	snprintf(str, size, "WakeUp [%s]",
	dwc3_gadget_link_string(state));
	break;
	case DWC3_DEVICE_EVENT_SUSPEND:
	snprintf(str, size, "Suspend [%s]",
	dwc3_gadget_link_string(state));
	break;
	case DWC3_DEVICE_EVENT_SOF:
	snprintf(str, size, "Start-Of-Frame [%s]",
	dwc3_gadget_link_string(state));
	break;
	case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
	snprintf(str, size, "Erratic Error [%s]",
	dwc3_gadget_link_string(state));
	break;
	case DWC3_DEVICE_EVENT_CMD_CMPL:
	snprintf(str, size, "Command Complete [%s]",
	dwc3_gadget_link_string(state));
	break;
	case DWC3_DEVICE_EVENT_OVERFLOW:
	snprintf(str, size, "Overflow [%s]",
	dwc3_gadget_link_string(state));
	break;
	default:
	snprintf(str, size, "UNKNOWN");
	}

	return str;
	}

	/**
	* dwc3_ep_event_string - returns event name
	* @event: then event code
	*/
	static inline const char dwc3_ep_event_string(char str, size_t size,
	const struct dwc3_event_depevt *event, u32 ep0state)
	{
	u8 epnum = event->endpoint_number;
	size_t len;
	int status;

	len = scnprintf(str, size, "ep%d%s: ", epnum >> 1,
	(epnum & 1) ? "in" : "out");

	status = event->status;

	switch (event->endpoint_event) {
	case DWC3_DEPEVT_XFERCOMPLETE:
	len += scnprintf(str + len, size - len,
	"Transfer Complete (%c%c%c)",
	status & DEPEVT_STATUS_SHORT ? 'S' : 's',
	status & DEPEVT_STATUS_IOC ? 'I' : 'i',
	status & DEPEVT_STATUS_LST ? 'L' : 'l');

	if (epnum <= 1)
	scnprintf(str + len, size - len, " [%s]",
	dwc3_ep0_state_string(ep0state));
	break;
	case DWC3_DEPEVT_XFERINPROGRESS:
	scnprintf(str + len, size - len,
	"Transfer In Progress [%08x] (%c%c%c)",
	event->parameters,
	status & DEPEVT_STATUS_SHORT ? 'S' : 's',
	status & DEPEVT_STATUS_IOC ? 'I' : 'i',
	status & DEPEVT_STATUS_LST ? 'M' : 'm');
	break;
	case DWC3_DEPEVT_XFERNOTREADY:
	len += scnprintf(str + len, size - len,
	"Transfer Not Ready [%08x]%s",
	event->parameters,
	status & DEPEVT_STATUS_TRANSFER_ACTIVE ?
	" (Active)" : " (Not Active)");

	/* Control Endpoints */
	if (epnum <= 1) {
	int phase = DEPEVT_STATUS_CONTROL_PHASE(event->status);

	switch (phase) {
	case DEPEVT_STATUS_CONTROL_DATA:
	scnprintf(str + len, size - len,
	" [Data Phase]");
	break;
	case DEPEVT_STATUS_CONTROL_STATUS:
	scnprintf(str + len, size - len,
	" [Status Phase]");
	}
	}
	break;
	case DWC3_DEPEVT_RXTXFIFOEVT:
	scnprintf(str + len, size - len, "FIFO");
	break;
	case DWC3_DEPEVT_STREAMEVT:
	status = event->status;

	switch (status) {
	case DEPEVT_STREAMEVT_FOUND:
	scnprintf(str + len, size - len, " Stream %d Found",
	event->parameters);
	break;
	case DEPEVT_STREAMEVT_NOTFOUND:
	default:
	scnprintf(str + len, size - len, " Stream Not Found");
	break;
	}

	break;
	case DWC3_DEPEVT_EPCMDCMPLT:
	scnprintf(str + len, size - len, "Endpoint Command Complete");
	break;
	default:
	scnprintf(str + len, size - len, "UNKNOWN");
	}

	return str;
	}

	/**
	* dwc3_gadget_event_type_string - return event name
	* @event: the event code
	*/
	static inline const char *dwc3_gadget_event_type_string(u8 event)
	{
	switch (event) {
	case DWC3_DEVICE_EVENT_DISCONNECT:
	return "Disconnect";
	case DWC3_DEVICE_EVENT_RESET:
	return "Reset";
	case DWC3_DEVICE_EVENT_CONNECT_DONE:
	return "Connect Done";
	case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
	return "Link Status Change";
	case DWC3_DEVICE_EVENT_WAKEUP:
	return "Wake-Up";
	case DWC3_DEVICE_EVENT_HIBER_REQ:
	return "Hibernation";
	case DWC3_DEVICE_EVENT_SUSPEND:
	return "Suspend";
	case DWC3_DEVICE_EVENT_SOF:
	return "Start of Frame";
	case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
	return "Erratic Error";
	case DWC3_DEVICE_EVENT_CMD_CMPL:
	return "Command Complete";
	case DWC3_DEVICE_EVENT_OVERFLOW:
	return "Overflow";
	default:
	return "UNKNOWN";
	}
	}

	static inline const char dwc3_decode_event(char str, size_t size, u32 event,
	u32 ep0state)
	{
	union dwc3_event evt;

	memcpy(&evt, &event, sizeof(event));

	if (evt.type.is_devspec)
	return dwc3_gadget_event_string(str, size, &evt.devt);
	else
	return dwc3_ep_event_string(str, size, &evt.depevt, ep0state);
	}

	static inline const char *dwc3_ep_cmd_status_string(int status)
	{
	switch (status) {
	case -ETIMEDOUT:
	return "Timed Out";
	case 0:
	return "Successful";
	case DEPEVT_TRANSFER_NO_RESOURCE:
	return "No Resource";
	case DEPEVT_TRANSFER_BUS_EXPIRY:
	return "Bus Expiry";
	default:
	return "UNKNOWN";
	}
	}

	static inline const char *dwc3_gadget_generic_cmd_status_string(int status)
	{
	switch (status) {
	case -ETIMEDOUT:
	return "Timed Out";
	case 0:
	return "Successful";
	case 1:
	return "Error";
	default:
	return "UNKNOWN";
	}
	}


	#ifdef CONFIG_DEBUG_FS
	extern void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep);
	extern void dwc3_debugfs_remove_endpoint_dir(struct dwc3_ep *dep);
	extern void dwc3_debugfs_init(struct dwc3 *d);
	extern void dwc3_debugfs_exit(struct dwc3 *d);
	#else
	static inline void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep)
	{ }
	static inline void dwc3_debugfs_remove_endpoint_dir(struct dwc3_ep *dep)
	{ }
	static inline void dwc3_debugfs_init(struct dwc3 *d)
	{ }
	static inline void dwc3_debugfs_exit(struct dwc3 *d)
	{ }
	#endif
	#endif /* __DWC3_DEBUG_H */