[PATCH 1/5] Add the debug filesystem framework

[dreamfly281 at gmail.com]

From: Yanbo Li <yanbol at qti.qualcomm.com>

This patch add the debug file system framework which
will be used to add some dynamic debug switcher.

Signed-off-by: Yanbo Li <yanbol at qti.qualcomm.com>
---
 Makefile  |    3 ++-
 debug.c   |   57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 debug.h   |   39 +++++++++++++++++++++++++++++++++++++++
 main.c    |    2 ++
 wcn36xx.h |    4 ++++
 5 files changed, 104 insertions(+), 1 deletion(-)
 create mode 100644 debug.c
 create mode 100644 debug.h

diff --git a/Makefile b/Makefile
index 302216f..12c6d23 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,8 @@ ifneq ($(KERNELRELEASE),)
 				main.o \
 				dxe.o \
 				txrx.o \
-				smd.o
+				smd.o \
+				debug.o
 
 	obj-m := wcn36xx.o
 else
diff --git a/debug.c b/debug.c
new file mode 100644
index 0000000..a54f15d
--- /dev/null
+++ b/debug.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * Licensed under the ISC license by Qualcomm Atheros, Inc.
+ *
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+#include "wcn36xx.h"
+#include "debug.h"
+
+#define ADD_FILE_BOOL(name, mode, fop, priv_data)		\
+	do {							\
+		struct dentry *d;				\
+		d = debugfs_create_file(__stringify(name),	\
+					mode, dfs->rootdir,	\
+					priv_data, fop);	\
+		dfs->file_##name.dentry = d;			\
+		if (IS_ERR(d)) {				\
+			wcn36xx_warn("Create the debugfs entry failed");\
+			dfs->file_##name.dentry = NULL;		\
+		}						\
+	} while (0)
+
+
+void wcn36xx_debugfs_init(struct wcn36xx *wcn)
+{
+	struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
+
+	dfs->rootdir = debugfs_create_dir(KBUILD_MODNAME,
+					  wcn->hw->wiphy->debugfsdir);
+	if (IS_ERR(dfs->rootdir)) {
+		wcn36xx_warn("Create the debugfs failed");
+		dfs->rootdir = NULL;
+	}
+}
+
+void wcn36xx_debugfs_exit(struct wcn36xx *wcn)
+{
+	struct wcn36xx_dfs_entry *dfs = &wcn->dfs;
+	debugfs_remove_recursive(dfs->rootdir);
+}
diff --git a/debug.h b/debug.h
new file mode 100644
index 0000000..f74e582
--- /dev/null
+++ b/debug.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * Licensed under the ISC license by Qualcomm Atheros, Inc.
+ *
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _WCN36XX_DEBUG_H_
+#define _WCN36XX_DEBUG_H_
+
+#include <linux/kernel.h>
+
+struct wcn36xx_dfs_file {
+	struct dentry *dentry;
+	u32 value;
+};
+
+struct wcn36xx_dfs_entry {
+	struct dentry *rootdir;
+};
+
+void wcn36xx_debugfs_init(struct wcn36xx *wcn);
+void wcn36xx_debugfs_exit(struct wcn36xx *wcn);
+
+#endif	/* _WCN36XX_DEBUG_H_ */
diff --git a/main.c b/main.c
index 0cc3e02..3798744 100644
--- a/main.c
+++ b/main.c
@@ -235,6 +235,7 @@ static int wcn36xx_start(struct ieee80211_hw *hw)
 		wcn36xx_error("DXE init failed");
 		goto out_smd_stop;
 	}
+	wcn36xx_debugfs_init(wcn);
 	return 0;
 
 out_smd_stop:
@@ -256,6 +257,7 @@ static void wcn36xx_stop(struct ieee80211_hw *hw)
 
 	wcn36xx_dbg(WCN36XX_DBG_MAC, "mac stop");
 
+	wcn36xx_debugfs_exit(wcn);
 	wcn36xx_smd_stop(wcn);
 	wcn36xx_dxe_deinit(wcn);
 	wcn36xx_smd_close(wcn);
diff --git a/wcn36xx.h b/wcn36xx.h
index 2c72349..c1ceafb 100644
--- a/wcn36xx.h
+++ b/wcn36xx.h
@@ -28,6 +28,7 @@
 #include "hal.h"
 #include "smd.h"
 #include "dxe.h"
+#include "debug.h"
 
 #define DRIVER_PREFIX "wcn36xx: "
 #define WLAN_NV_FILE               "wlan/prima/WCNSS_qcom_wlan_nv.bin"
@@ -161,6 +162,9 @@ struct wcn36xx {
 	struct wcn36xx_dxe_mem_pool data_mem_pool;
 
 	struct sk_buff		*tx_ack_skb;
+
+	/* Debug file system entry */
+	struct wcn36xx_dfs_entry    dfs;
 };
 
 #endif	/* _WCN36XX_H_ */
-- 
1.7.9.5