1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/usb/gadget/debug.h b/drivers/usb/gadget/debug.h
new file mode 100644
index 000000000000..8729aca0a69e
--- /dev/null
+++ b/drivers/usb/gadget/debug.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 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.
+ *
+ */
+
+#ifndef __DEBUG_H_
+#define __DEBUG_H_
+
+#define DBG_MAX_MSG   1024UL
+#define DBG_MSG_LEN   80UL
+#define TIME_BUF_LEN  17
+#define DBG_EVENT_LEN  (DBG_MSG_LEN - TIME_BUF_LEN)
+
+extern unsigned int enable_event_log;
+extern void put_timestamp(char *tbuf);
+extern void add_event_to_buf(char *tbuf);
+extern int debug_debugfs_init(void);
+extern void debug_debugfs_exit(void);
+
+#define LOGLEVEL_NONE 8
+#define LOGLEVEL_DEBUG 7
+#define LOGLEVEL_INFO 6
+#define LOGLEVEL_ERR 3
+
+#define log_event(log_level, x...)					\
+do {									\
+	char buf[DBG_MSG_LEN];						\
+	if (log_level == LOGLEVEL_DEBUG)				\
+		pr_debug(x);						\
+	else if (log_level == LOGLEVEL_ERR)				\
+		pr_err(x);						\
+	else if (log_level == LOGLEVEL_INFO)				\
+		pr_info(x);						\
+	if (enable_event_log) {						\
+		put_timestamp(buf);					\
+		snprintf(&buf[TIME_BUF_LEN - 1], DBG_EVENT_LEN, x);	\
+		add_event_to_buf(buf);					\
+	}								\
+} while (0)
+
+#define log_event_none(x, ...) log_event(LOGLEVEL_NONE, x, ##__VA_ARGS__)
+#define log_event_dbg(x, ...) log_event(LOGLEVEL_DEBUG, x, ##__VA_ARGS__)
+#define log_event_err(x, ...) log_event(LOGLEVEL_ERR, x, ##__VA_ARGS__)
+#define log_event_info(x, ...) log_event(LOGLEVEL_INFO, x, ##__VA_ARGS__)
+
+#endif	/* __DEBUG_H_ */