5 files changed, 530 insertions, 55 deletions

diff --git a/drivers/usb/gadget/udc/Makefile b/drivers/usb/gadget/udc/Makefile
index dfee53446319..98e74ed9f555 100644
--- a/drivers/usb/gadget/udc/Makefile
+++ b/drivers/usb/gadget/udc/Makefile
@@ -1,3 +1,8 @@
+# define_trace.h needs to know how to find our header
+CFLAGS_trace.o			:= -I$(src)
+
+udc-core-y			:= core.o trace.o
+
 #
 # USB peripheral controller drivers
 #
diff --git a/drivers/usb/gadget/udc/udc-core.c b/drivers/usb/gadget/udc/core.c
index abf013865e51..ff8685ea7219 100644
--- a/drivers/usb/gadget/udc/udc-core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -29,6 +29,8 @@
 #include <linux/usb/gadget.h>
 #include <linux/usb.h>
 
+#include "trace.h"
+
 /**
  * struct usb_udc - describes one usb device controller
  * @driver - the gadget driver pointer. For use by the class code
@@ -72,6 +74,8 @@ void usb_ep_set_maxpacket_limit(struct usb_ep *ep,
 {
 	ep->maxpacket_limit = maxpacket_limit;
 	ep->maxpacket = maxpacket_limit;
+
+	trace_usb_ep_set_maxpacket_limit(ep, 0);
 }
 EXPORT_SYMBOL_GPL(usb_ep_set_maxpacket_limit);
 
@@ -97,18 +101,23 @@ EXPORT_SYMBOL_GPL(usb_ep_set_maxpacket_limit);
  */
 int usb_ep_enable(struct usb_ep *ep)
 {
-	int ret;
+	int ret = 0;
 
 	if (ep->enabled)
-		return 0;
+		goto out;
 
 	ret = ep->ops->enable(ep, ep->desc);
-	if (ret)
-		return ret;
+	if (ret) {
+		ret = ret;
+		goto out;
+	}
 
 	ep->enabled = true;
 
-	return 0;
+out:
+	trace_usb_ep_enable(ep, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_ep_enable);
 
@@ -126,18 +135,23 @@ EXPORT_SYMBOL_GPL(usb_ep_enable);
  */
 int usb_ep_disable(struct usb_ep *ep)
 {
-	int ret;
+	int ret = 0;
 
 	if (!ep->enabled)
-		return 0;
+		goto out;
 
 	ret = ep->ops->disable(ep);
-	if (ret)
-		return ret;
+	if (ret) {
+		ret = ret;
+		goto out;
+	}
 
 	ep->enabled = false;
 
-	return 0;
+out:
+	trace_usb_ep_disable(ep, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_ep_disable);
 
@@ -158,7 +172,13 @@ EXPORT_SYMBOL_GPL(usb_ep_disable);
 struct usb_request *usb_ep_alloc_request(struct usb_ep *ep,
 						       gfp_t gfp_flags)
 {
-	return ep->ops->alloc_request(ep, gfp_flags);
+	struct usb_request *req = NULL;
+
+	req = ep->ops->alloc_request(ep, gfp_flags);
+
+	trace_usb_ep_alloc_request(ep, req, req ? 0 : -ENOMEM);
+
+	return req;
 }
 EXPORT_SYMBOL_GPL(usb_ep_alloc_request);
 
@@ -175,6 +195,7 @@ void usb_ep_free_request(struct usb_ep *ep,
 				       struct usb_request *req)
 {
 	ep->ops->free_request(ep, req);
+	trace_usb_ep_free_request(ep, req, 0);
 }
 EXPORT_SYMBOL_GPL(usb_ep_free_request);
 
@@ -238,10 +259,19 @@ EXPORT_SYMBOL_GPL(usb_ep_free_request);
 int usb_ep_queue(struct usb_ep *ep,
 			       struct usb_request *req, gfp_t gfp_flags)
 {
-	if (WARN_ON_ONCE(!ep->enabled && ep->address))
-		return -ESHUTDOWN;
+	int ret = 0;
+
+	if (WARN_ON_ONCE(!ep->enabled && ep->address)) {
+		ret = -ESHUTDOWN;
+		goto out;
+	}
+
+	ret = ep->ops->queue(ep, req, gfp_flags);
 
-	return ep->ops->queue(ep, req, gfp_flags);
+out:
+	trace_usb_ep_queue(ep, req, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_ep_queue);
 
@@ -262,7 +292,12 @@ EXPORT_SYMBOL_GPL(usb_ep_queue);
  */
 int usb_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 {
-	return ep->ops->dequeue(ep, req);
+	int ret;
+
+	ret = ep->ops->dequeue(ep, req);
+	trace_usb_ep_dequeue(ep, req, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_ep_dequeue);
 
@@ -289,7 +324,12 @@ EXPORT_SYMBOL_GPL(usb_ep_dequeue);
  */
 int usb_ep_set_halt(struct usb_ep *ep)
 {
-	return ep->ops->set_halt(ep, 1);
+	int ret;
+
+	ret = ep->ops->set_halt(ep, 1);
+	trace_usb_ep_set_halt(ep, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_ep_set_halt);
 
@@ -308,7 +348,12 @@ EXPORT_SYMBOL_GPL(usb_ep_set_halt);
  */
 int usb_ep_clear_halt(struct usb_ep *ep)
 {
-	return ep->ops->set_halt(ep, 0);
+	int ret;
+
+	ret = ep->ops->set_halt(ep, 0);
+	trace_usb_ep_clear_halt(ep, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_ep_clear_halt);
 
@@ -324,10 +369,16 @@ EXPORT_SYMBOL_GPL(usb_ep_clear_halt);
  */
 int usb_ep_set_wedge(struct usb_ep *ep)
 {
+	int ret;
+
 	if (ep->ops->set_wedge)
-		return ep->ops->set_wedge(ep);
+		ret = ep->ops->set_wedge(ep);
 	else
-		return ep->ops->set_halt(ep, 1);
+		ret = ep->ops->set_halt(ep, 1);
+
+	trace_usb_ep_set_wedge(ep, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_ep_set_wedge);
 
@@ -348,10 +399,16 @@ EXPORT_SYMBOL_GPL(usb_ep_set_wedge);
  */
 int usb_ep_fifo_status(struct usb_ep *ep)
 {
+	int ret;
+
 	if (ep->ops->fifo_status)
-		return ep->ops->fifo_status(ep);
+		ret = ep->ops->fifo_status(ep);
 	else
-		return -EOPNOTSUPP;
+		ret = -EOPNOTSUPP;
+
+	trace_usb_ep_fifo_status(ep, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_ep_fifo_status);
 
@@ -368,6 +425,8 @@ void usb_ep_fifo_flush(struct usb_ep *ep)
 {
 	if (ep->ops->fifo_flush)
 		ep->ops->fifo_flush(ep);
+
+	trace_usb_ep_fifo_flush(ep, 0);
 }
 EXPORT_SYMBOL_GPL(usb_ep_fifo_flush);
 
@@ -382,7 +441,13 @@ EXPORT_SYMBOL_GPL(usb_ep_fifo_flush);
  */
 int usb_gadget_frame_number(struct usb_gadget *gadget)
 {
-	return gadget->ops->get_frame(gadget);
+	int ret;
+
+	ret = gadget->ops->get_frame(gadget);
+
+	trace_usb_gadget_frame_number(gadget, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_frame_number);
 
@@ -401,9 +466,19 @@ EXPORT_SYMBOL_GPL(usb_gadget_frame_number);
  */
 int usb_gadget_wakeup(struct usb_gadget *gadget)
 {
-	if (!gadget->ops->wakeup)
-		return -EOPNOTSUPP;
-	return gadget->ops->wakeup(gadget);
+	int ret = 0;
+
+	if (!gadget->ops->wakeup) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	ret = gadget->ops->wakeup(gadget);
+
+out:
+	trace_usb_gadget_wakeup(gadget, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_wakeup);
 
@@ -418,9 +493,19 @@ EXPORT_SYMBOL_GPL(usb_gadget_wakeup);
  */
 int usb_gadget_set_selfpowered(struct usb_gadget *gadget)
 {
-	if (!gadget->ops->set_selfpowered)
-		return -EOPNOTSUPP;
-	return gadget->ops->set_selfpowered(gadget, 1);
+	int ret = 0;
+
+	if (!gadget->ops->set_selfpowered) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	ret = gadget->ops->set_selfpowered(gadget, 1);
+
+out:
+	trace_usb_gadget_set_selfpowered(gadget, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_set_selfpowered);
 
@@ -436,9 +521,19 @@ EXPORT_SYMBOL_GPL(usb_gadget_set_selfpowered);
  */
 int usb_gadget_clear_selfpowered(struct usb_gadget *gadget)
 {
-	if (!gadget->ops->set_selfpowered)
-		return -EOPNOTSUPP;
-	return gadget->ops->set_selfpowered(gadget, 0);
+	int ret = 0;
+
+	if (!gadget->ops->set_selfpowered) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	ret = gadget->ops->set_selfpowered(gadget, 0);
+
+out:
+	trace_usb_gadget_clear_selfpowered(gadget, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_clear_selfpowered);
 
@@ -457,9 +552,19 @@ EXPORT_SYMBOL_GPL(usb_gadget_clear_selfpowered);
  */
 int usb_gadget_vbus_connect(struct usb_gadget *gadget)
 {
-	if (!gadget->ops->vbus_session)
-		return -EOPNOTSUPP;
-	return gadget->ops->vbus_session(gadget, 1);
+	int ret = 0;
+
+	if (!gadget->ops->vbus_session) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	ret = gadget->ops->vbus_session(gadget, 1);
+
+out:
+	trace_usb_gadget_vbus_connect(gadget, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_vbus_connect);
 
@@ -477,9 +582,21 @@ EXPORT_SYMBOL_GPL(usb_gadget_vbus_connect);
  */
 int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA)
 {
-	if (!gadget->ops->vbus_draw)
-		return -EOPNOTSUPP;
-	return gadget->ops->vbus_draw(gadget, mA);
+	int ret = 0;
+
+	if (!gadget->ops->vbus_draw) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	ret = gadget->ops->vbus_draw(gadget, mA);
+	if (!ret)
+		gadget->mA = mA;
+
+out:
+	trace_usb_gadget_vbus_draw(gadget, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_vbus_draw);
 
@@ -496,9 +613,19 @@ EXPORT_SYMBOL_GPL(usb_gadget_vbus_draw);
  */
 int usb_gadget_vbus_disconnect(struct usb_gadget *gadget)
 {
-	if (!gadget->ops->vbus_session)
-		return -EOPNOTSUPP;
-	return gadget->ops->vbus_session(gadget, 0);
+	int ret = 0;
+
+	if (!gadget->ops->vbus_session) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	ret = gadget->ops->vbus_session(gadget, 0);
+
+out:
+	trace_usb_gadget_vbus_disconnect(gadget, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_vbus_disconnect);
 
@@ -515,10 +642,12 @@ EXPORT_SYMBOL_GPL(usb_gadget_vbus_disconnect);
  */
 int usb_gadget_connect(struct usb_gadget *gadget)
 {
-	int ret;
+	int ret = 0;
 
-	if (!gadget->ops->pullup)
-		return -EOPNOTSUPP;
+	if (!gadget->ops->pullup) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
 
 	if (gadget->deactivated) {
 		/*
@@ -526,12 +655,16 @@ int usb_gadget_connect(struct usb_gadget *gadget)
 		 * Gadget will be connected automatically after activation.
 		 */
 		gadget->connected = true;
-		return 0;
+		goto out;
 	}
 
 	ret = gadget->ops->pullup(gadget, 1);
 	if (!ret)
 		gadget->connected = 1;
+
+out:
+	trace_usb_gadget_connect(gadget, ret);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_connect);
@@ -548,10 +681,12 @@ EXPORT_SYMBOL_GPL(usb_gadget_connect);
  */
 int usb_gadget_disconnect(struct usb_gadget *gadget)
 {
-	int ret;
+	int ret = 0;
 
-	if (!gadget->ops->pullup)
-		return -EOPNOTSUPP;
+	if (!gadget->ops->pullup) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
 
 	if (gadget->deactivated) {
 		/*
@@ -559,12 +694,16 @@ int usb_gadget_disconnect(struct usb_gadget *gadget)
 		 * Gadget will stay disconnected after activation.
 		 */
 		gadget->connected = false;
-		return 0;
+		goto out;
 	}
 
 	ret = gadget->ops->pullup(gadget, 0);
 	if (!ret)
 		gadget->connected = 0;
+
+out:
+	trace_usb_gadget_disconnect(gadget, ret);
+
 	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_disconnect);
@@ -582,15 +721,16 @@ EXPORT_SYMBOL_GPL(usb_gadget_disconnect);
  */
 int usb_gadget_deactivate(struct usb_gadget *gadget)
 {
-	int ret;
+	int ret = 0;
 
 	if (gadget->deactivated)
-		return 0;
+		goto out;
 
 	if (gadget->connected) {
 		ret = usb_gadget_disconnect(gadget);
 		if (ret)
-			return ret;
+			goto out;
+
 		/*
 		 * If gadget was being connected before deactivation, we want
 		 * to reconnect it in usb_gadget_activate().
@@ -599,7 +739,10 @@ int usb_gadget_deactivate(struct usb_gadget *gadget)
 	}
 	gadget->deactivated = true;
 
-	return 0;
+out:
+	trace_usb_gadget_deactivate(gadget, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_deactivate);
 
@@ -614,8 +757,10 @@ EXPORT_SYMBOL_GPL(usb_gadget_deactivate);
  */
 int usb_gadget_activate(struct usb_gadget *gadget)
 {
+	int ret = 0;
+
 	if (!gadget->deactivated)
-		return 0;
+		goto out;
 
 	gadget->deactivated = false;
 
@@ -624,9 +769,12 @@ int usb_gadget_activate(struct usb_gadget *gadget)
 	 * while it was being deactivated, we call usb_gadget_connect().
 	 */
 	if (gadget->connected)
-		return usb_gadget_connect(gadget);
+		ret = usb_gadget_connect(gadget);
 
-	return 0;
+out:
+	trace_usb_gadget_activate(gadget, ret);
+
+	return ret;
 }
 EXPORT_SYMBOL_GPL(usb_gadget_activate);
 
@@ -714,6 +862,8 @@ void usb_gadget_giveback_request(struct usb_ep *ep,
 	if (likely(req->status == 0))
 		usb_led_activity(USB_LED_EVENT_GADGET);
 
+	trace_usb_gadget_giveback_request(ep, req, 0);
+
 	req->complete(ep, req);
 }
 EXPORT_SYMBOL_GPL(usb_gadget_giveback_request);
diff --git a/drivers/usb/gadget/udc/trace.c b/drivers/usb/gadget/udc/trace.c
new file mode 100644
index 000000000000..8c551ab91ad8
--- /dev/null
+++ b/drivers/usb/gadget/udc/trace.c
@@ -0,0 +1,18 @@
+/**
+ * trace.c - USB Gadget Framework Trace Support
+ *
+ * Copyright (C) 2016 Intel Corporation
+ * Author: Felipe Balbi <felipe.balbi@linux.intel.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2  of
+ * the License as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#define CREATE_TRACE_POINTS
+#include "trace.h"
diff --git a/drivers/usb/gadget/udc/trace.h b/drivers/usb/gadget/udc/trace.h
new file mode 100644
index 000000000000..da29874b5366
--- /dev/null
+++ b/drivers/usb/gadget/udc/trace.h
@@ -0,0 +1,298 @@
+/**
+ * udc.c - Core UDC Framework
+ *
+ * Copyright (C) 2016 Intel Corporation
+ * Author: Felipe Balbi <felipe.balbi@linux.intel.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2  of
+ * the License as published by the Free Software Foundation.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM gadget
+
+#if !defined(__UDC_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define __UDC_TRACE_H
+
+#include <linux/types.h>
+#include <linux/tracepoint.h>
+#include <asm/byteorder.h>
+#include <linux/usb/gadget.h>
+
+DECLARE_EVENT_CLASS(udc_log_gadget,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret),
+	TP_STRUCT__entry(
+		__field(enum usb_device_speed, speed)
+		__field(enum usb_device_speed, max_speed)
+		__field(enum usb_device_state, state)
+		__field(unsigned, mA)
+		__field(unsigned, sg_supported)
+		__field(unsigned, is_otg)
+		__field(unsigned, is_a_peripheral)
+		__field(unsigned, b_hnp_enable)
+		__field(unsigned, a_hnp_support)
+		__field(unsigned, hnp_polling_support)
+		__field(unsigned, host_request_flag)
+		__field(unsigned, quirk_ep_out_aligned_size)
+		__field(unsigned, quirk_altset_not_supp)
+		__field(unsigned, quirk_stall_not_supp)
+		__field(unsigned, quirk_zlp_not_supp)
+		__field(unsigned, is_selfpowered)
+		__field(unsigned, deactivated)
+		__field(unsigned, connected)
+		__field(int, ret)
+	),
+	TP_fast_assign(
+		__entry->speed = g->speed;
+		__entry->max_speed = g->max_speed;
+		__entry->state = g->state;
+		__entry->mA = g->mA;
+		__entry->sg_supported = g->sg_supported;
+		__entry->is_otg = g->is_otg;
+		__entry->is_a_peripheral = g->is_a_peripheral;
+		__entry->b_hnp_enable = g->b_hnp_enable;
+		__entry->a_hnp_support = g->a_hnp_support;
+		__entry->hnp_polling_support = g->hnp_polling_support;
+		__entry->host_request_flag = g->host_request_flag;
+		__entry->quirk_ep_out_aligned_size = g->quirk_ep_out_aligned_size;
+		__entry->quirk_altset_not_supp = g->quirk_altset_not_supp;
+		__entry->quirk_stall_not_supp = g->quirk_stall_not_supp;
+		__entry->quirk_zlp_not_supp = g->quirk_zlp_not_supp;
+		__entry->is_selfpowered = g->is_selfpowered;
+		__entry->deactivated = g->deactivated;
+		__entry->connected = g->connected;
+		__entry->ret = ret;
+	),
+	TP_printk("speed %d/%d state %d %dmA [%s%s%s%s%s%s%s%s%s%s%s%s%s%s] --> %d",
+		__entry->speed, __entry->max_speed, __entry->state, __entry->mA,
+		__entry->sg_supported ? "sg:" : "",
+		__entry->is_otg ? "OTG:" : "",
+		__entry->is_a_peripheral ? "a_peripheral:" : "",
+		__entry->b_hnp_enable ? "b_hnp:" : "",
+		__entry->a_hnp_support ? "a_hnp:" : "",
+		__entry->hnp_polling_support ? "hnp_poll:" : "",
+		__entry->host_request_flag ? "hostreq:" : "",
+		__entry->quirk_ep_out_aligned_size ? "out_aligned:" : "",
+		__entry->quirk_altset_not_supp ? "no_altset:" : "",
+		__entry->quirk_stall_not_supp ? "no_stall:" : "",
+		__entry->quirk_zlp_not_supp ? "no_zlp" : "",
+		__entry->is_selfpowered ? "self-powered:" : "bus-powered:",
+		__entry->deactivated ? "deactivated:" : "activated:",
+		__entry->connected ? "connected" : "disconnected",
+		__entry->ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_frame_number,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_wakeup,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_set_selfpowered,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_clear_selfpowered,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_vbus_connect,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_vbus_draw,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_vbus_disconnect,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_connect,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_disconnect,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_deactivate,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DEFINE_EVENT(udc_log_gadget, usb_gadget_activate,
+	TP_PROTO(struct usb_gadget *g, int ret),
+	TP_ARGS(g, ret)
+);
+
+DECLARE_EVENT_CLASS(udc_log_ep,
+	TP_PROTO(struct usb_ep *ep, int ret),
+	TP_ARGS(ep, ret),
+	TP_STRUCT__entry(
+		__dynamic_array(char, name, UDC_TRACE_STR_MAX)
+		__field(unsigned, maxpacket)
+		__field(unsigned, maxpacket_limit)
+		__field(unsigned, max_streams)
+		__field(unsigned, mult)
+		__field(unsigned, maxburst)
+		__field(u8, address)
+		__field(bool, claimed)
+		__field(bool, enabled)
+		__field(int, ret)
+	),
+	TP_fast_assign(
+		snprintf(__get_str(name), UDC_TRACE_STR_MAX, "%s", ep->name);
+		__entry->maxpacket = ep->maxpacket;
+		__entry->maxpacket_limit = ep->maxpacket_limit;
+		__entry->max_streams = ep->max_streams;
+		__entry->mult = ep->mult;
+		__entry->maxburst = ep->maxburst;
+		__entry->address = ep->address,
+		__entry->claimed = ep->claimed;
+		__entry->enabled = ep->enabled;
+		__entry->ret = ret;
+	),
+	TP_printk("%s: mps %d/%d streams %d mult %d burst %d addr %02x %s%s --> %d",
+		__get_str(name), __entry->maxpacket, __entry->maxpacket_limit,
+		__entry->max_streams, __entry->mult, __entry->maxburst,
+		__entry->address, __entry->claimed ? "claimed:" : "released:",
+		__entry->enabled ? "enabled" : "disabled", ret)
+);
+
+DEFINE_EVENT(udc_log_ep, usb_ep_set_maxpacket_limit,
+	TP_PROTO(struct usb_ep *ep, int ret),
+	TP_ARGS(ep, ret)
+);
+
+DEFINE_EVENT(udc_log_ep, usb_ep_enable,
+	TP_PROTO(struct usb_ep *ep, int ret),
+	TP_ARGS(ep, ret)
+);
+
+DEFINE_EVENT(udc_log_ep, usb_ep_disable,
+	TP_PROTO(struct usb_ep *ep, int ret),
+	TP_ARGS(ep, ret)
+);
+
+DEFINE_EVENT(udc_log_ep, usb_ep_set_halt,
+	TP_PROTO(struct usb_ep *ep, int ret),
+	TP_ARGS(ep, ret)
+);
+
+DEFINE_EVENT(udc_log_ep, usb_ep_clear_halt,
+	TP_PROTO(struct usb_ep *ep, int ret),
+	TP_ARGS(ep, ret)
+);
+
+DEFINE_EVENT(udc_log_ep, usb_ep_set_wedge,
+	TP_PROTO(struct usb_ep *ep, int ret),
+	TP_ARGS(ep, ret)
+);
+
+DEFINE_EVENT(udc_log_ep, usb_ep_fifo_status,
+	TP_PROTO(struct usb_ep *ep, int ret),
+	TP_ARGS(ep, ret)
+);
+
+DEFINE_EVENT(udc_log_ep, usb_ep_fifo_flush,
+	TP_PROTO(struct usb_ep *ep, int ret),
+	TP_ARGS(ep, ret)
+);
+
+DECLARE_EVENT_CLASS(udc_log_req,
+	TP_PROTO(struct usb_ep *ep, struct usb_request *req, int ret),
+	TP_ARGS(ep, req, ret),
+	TP_STRUCT__entry(
+		__dynamic_array(char, name, UDC_TRACE_STR_MAX)
+		__field(unsigned, length)
+		__field(unsigned, actual)
+		__field(unsigned, num_sgs)
+		__field(unsigned, num_mapped_sgs)
+		__field(unsigned, stream_id)
+		__field(unsigned, no_interrupt)
+		__field(unsigned, zero)
+		__field(unsigned, short_not_ok)
+		__field(int, status)
+		__field(int, ret)
+	),
+	TP_fast_assign(
+		snprintf(__get_str(name), UDC_TRACE_STR_MAX, "%s", ep->name);
+		__entry->length = req->length;
+		__entry->actual = req->actual;
+		__entry->num_sgs = req->num_sgs;
+		__entry->num_mapped_sgs = req->num_mapped_sgs;
+		__entry->stream_id = req->stream_id;
+		__entry->no_interrupt = req->no_interrupt;
+		__entry->zero = req->zero;
+		__entry->short_not_ok = req->short_not_ok;
+		__entry->status = req->status;
+		__entry->ret = ret;
+	),
+	TP_printk("%s: length %d/%d sgs %d/%d stream %d %s%s%s status %d --> %d",
+		__get_str(name), __entry->actual, __entry->length,
+		__entry->num_mapped_sgs, __entry->num_sgs, __entry->stream_id,
+		__entry->zero ? "Z" : "z",
+		__entry->short_not_ok ? "S" : "s",
+		__entry->no_interrupt ? "i" : "I",
+		__entry->status, __entry->ret
+	)
+);
+
+DEFINE_EVENT(udc_log_req, usb_ep_alloc_request,
+	TP_PROTO(struct usb_ep *ep, struct usb_request *req, int ret),
+	TP_ARGS(ep, req, ret)
+);
+
+DEFINE_EVENT(udc_log_req, usb_ep_free_request,
+	TP_PROTO(struct usb_ep *ep, struct usb_request *req, int ret),
+	TP_ARGS(ep, req, ret)
+);
+
+DEFINE_EVENT(udc_log_req, usb_ep_queue,
+	TP_PROTO(struct usb_ep *ep, struct usb_request *req, int ret),
+	TP_ARGS(ep, req, ret)
+);
+
+DEFINE_EVENT(udc_log_req, usb_ep_dequeue,
+	TP_PROTO(struct usb_ep *ep, struct usb_request *req, int ret),
+	TP_ARGS(ep, req, ret)
+);
+
+DEFINE_EVENT(udc_log_req, usb_gadget_giveback_request,
+	TP_PROTO(struct usb_ep *ep, struct usb_request *req, int ret),
+	TP_ARGS(ep, req, ret)
+);
+
+#endif /* __UDC_TRACE_H */
+
+/* this part has to be here */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+
+#include <trace/define_trace.h>
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index c6e1149ddb0d..612dbdfa388e 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -25,6 +25,8 @@
 #include <linux/workqueue.h>
 #include <linux/usb/ch9.h>
 
+#define UDC_TRACE_STR_MAX	512
+
 struct usb_ep;
 
 /**
@@ -324,6 +326,7 @@ struct usb_gadget_ops {
  * @dev: Driver model state for this abstract device.
  * @out_epnum: last used out ep number
  * @in_epnum: last used in ep number
+ * @mA: last set mA value
  * @otg_caps: OTG capabilities of this gadget.
  * @sg_supported: true if we can handle scatter-gather
  * @is_otg: True if the USB device port uses a Mini-AB jack, so that the
@@ -380,6 +383,7 @@ struct usb_gadget {
 	struct device			dev;
 	unsigned			out_epnum;
 	unsigned			in_epnum;
+	unsigned			mA;
 	struct usb_otg_caps		*otg_caps;
 
 	unsigned			sg_supported:1;