ar71xx: add dummy debugfs support for the ag71xx driver

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19031 3c298f89-4303-0410-b956-a3cf2f4a3e73

9 files changed, 109 insertions, 11 deletions

diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/Kconfig b/target/linux/ar71xx/files/drivers/net/ag71xx/Kconfig
index 801fcaf9d..15983f4ea 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/Kconfig
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/Kconfig
@@ -13,6 +13,14 @@ config AG71XX_DEBUG
 	help
 	  Atheros AR71xx built-in ethernet driver debugging messages.
 
+config AG71XX_DEBUG_FS
+	bool "Atheros AR71xx built-in ethernet driver debugfs support"
+	depends on AG71XX && DEBUG_FS
+	default n
+	help
+	  Say Y, if you need access to various statistics provided by
+	  the ag71xx driver.
+
 config AG71XX_AR8216_SUPPORT
 	bool "special support for the Atheros AR8216 switch"
 	depends on AG71XX
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/Makefile b/target/linux/ar71xx/files/drivers/net/ag71xx/Makefile
index aa1798d19..3485ab385 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/Makefile
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/Makefile
@@ -2,12 +2,13 @@
 # Makefile for the Atheros AR71xx built-in ethernet macs
 #
 
-ag71xx-y	+= ag71xx_main.o 
-ag71xx-y	+= ag71xx_ethtool.o 
-ag71xx-y	+= ag71xx_phy.o 
+ag71xx-y	+= ag71xx_main.o
+ag71xx-y	+= ag71xx_ethtool.o
+ag71xx-y	+= ag71xx_phy.o
 ag71xx-y	+= ag71xx_mdio.o
 
-ag71xx-$(CONFIG_AG71XX_AR8216_SUPPORT) += ag71xx_ar8216.o
+ag71xx-$(CONFIG_AG71XX_DEBUG_FS)	+= ag71xx_debugfs.o
+ag71xx-$(CONFIG_AG71XX_AR8216_SUPPORT)	+= ag71xx_ar8216.o
 
 obj-$(CONFIG_AG71XX)	+= ag71xx.o
 
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
index ac52896ab..b2f710ede 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
@@ -1,7 +1,7 @@
 /*
  *  Atheros AR71xx built-in ethernet mac driver
  *
- *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  *
  *  Based on Atheros' AG7100 driver
@@ -109,6 +109,10 @@ struct ag71xx_mdio {
 	struct ag71xx_mdio_platform_data *pdata;
 };
 
+struct ag71xx_debug {
+	struct dentry		*debugfs_dir;
+};
+
 struct ag71xx {
 	void __iomem		*mac_base;
 	void __iomem		*mii_ctrl;
@@ -131,6 +135,10 @@ struct ag71xx {
 
 	struct work_struct	restart_work;
 	struct timer_list	oom_timer;
+
+#ifdef CONFIG_AG71XX_DEBUG_FS
+	struct ag71xx_debug	debug;
+#endif
 };
 
 extern struct ethtool_ops ag71xx_ethtool_ops;
@@ -450,4 +458,16 @@ static inline int ag71xx_remove_ar8216_header(struct ag71xx *ag,
 }
 #endif
 
+#ifdef CONFIG_AG71XX_DEBUG_FS
+int ag71xx_debugfs_root_init(void);
+void ag71xx_debugfs_root_exit(void);
+int ag71xx_debugfs_init(struct ag71xx *ag);
+void ag71xx_debugfs_exit(struct ag71xx *ag);
+#else
+static inline int ag71xx_debugfs_root_init(void) { return 0; }
+static inline void ag71xx_debugfs_root_exit(void) {}
+static inline int ag71xx_debugfs_init(struct ag71xx *ag) { return 0; }
+static inline void ag71xx_debugfs_exit(struct ag71xx *ag) {}
+#endif /* CONFIG_AG71XX_DEBUG_FS */
+
 #endif /* _AG71XX_H */
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar8216.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar8216.c
index 39221ad62..5b3722651 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar8216.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar8216.c
@@ -2,7 +2,7 @@
  *  Atheros AR71xx built-in ethernet mac driver
  *  Special support for the Atheros ar8216 switch chip
  *
- *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
  *
  *  Based on Atheros' AG7100 driver
  *
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c
new file mode 100644
index 000000000..88101e47d
--- /dev/null
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c
@@ -0,0 +1,55 @@
+/*
+ *  Atheros AR71xx built-in ethernet mac driver
+ *
+ *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
+ *
+ *  Based on Atheros' AG7100 driver
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ */
+
+#include <linux/debugfs.h>
+
+#include "ag71xx.h"
+
+static struct dentry *ag71xx_debugfs_root;
+
+int ag71xx_debugfs_root_init(void)
+{
+	if (ag71xx_debugfs_root)
+		return -EBUSY;
+
+	ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
+	if (!ag71xx_debugfs_root)
+		return -ENOENT;
+
+	return 0;
+}
+
+void ag71xx_debugfs_root_exit(void)
+{
+	debugfs_remove(ag71xx_debugfs_root);
+	ag71xx_debugfs_root = NULL;
+}
+
+void ag71xx_debugfs_exit(struct ag71xx *ag)
+{
+	debugfs_remove(ag->debug.debugfs_dir);
+}
+
+int ag71xx_debugfs_init(struct ag71xx *ag)
+{
+	ag->debug.debugfs_dir = debugfs_create_dir(ag->dev->name,
+						   ag71xx_debugfs_root);
+	if (!ag->debug.debugfs_dir)
+		goto err;
+
+	return 0;
+
+ err:
+	ag71xx_debugfs_exit(ag);
+	return -ENOMEM;
+}
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ethtool.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ethtool.c
index 3ac347f6b..1f1c6aa77 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ethtool.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ethtool.c
@@ -1,7 +1,7 @@
 /*
  *  Atheros AR71xx built-in ethernet mac driver
  *
- *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  *
  *  Based on Atheros' AG7100 driver
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
index c8c61dead..869373aaf 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -1,7 +1,7 @@
 /*
  *  Atheros AR71xx built-in ethernet mac driver
  *
- *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  *
  *  Based on Atheros' AG7100 driver
@@ -922,10 +922,16 @@ static int __init ag71xx_probe(struct platform_device *pdev)
 	if (err)
 		goto err_unregister_netdev;
 
+	err = ag71xx_debugfs_init(ag);
+	if (err)
+		goto err_phy_disconnect;
+
 	platform_set_drvdata(pdev, dev);
 
 	return 0;
 
+ err_phy_disconnect:
+	ag71xx_phy_disconnect(ag);
  err_unregister_netdev:
 	unregister_netdev(dev);
  err_free_irq:
@@ -948,6 +954,7 @@ static int __exit ag71xx_remove(struct platform_device *pdev)
 	if (dev) {
 		struct ag71xx *ag = netdev_priv(dev);
 
+		ag71xx_debugfs_exit(ag);
 		ag71xx_phy_disconnect(ag);
 		unregister_netdev(dev);
 		free_irq(dev->irq, dev);
@@ -972,10 +979,14 @@ static int __init ag71xx_module_init(void)
 {
 	int ret;
 
-	ret = ag71xx_mdio_driver_init();
+	ret = ag71xx_debugfs_root_init();
 	if (ret)
 		goto err_out;
 
+	ret = ag71xx_mdio_driver_init();
+	if (ret)
+		goto err_debugfs_exit;
+
 	ret = platform_driver_register(&ag71xx_driver);
 	if (ret)
 		goto err_mdio_exit;
@@ -984,6 +995,8 @@ static int __init ag71xx_module_init(void)
 
  err_mdio_exit:
 	ag71xx_mdio_driver_exit();
+ err_debugfs_exit:
+	ag71xx_debugfs_root_exit();
  err_out:
 	return ret;
 }
@@ -992,6 +1005,7 @@ static void __exit ag71xx_module_exit(void)
 {
 	platform_driver_unregister(&ag71xx_driver);
 	ag71xx_mdio_driver_exit();
+	ag71xx_debugfs_root_exit();
 }
 
 module_init(ag71xx_module_init);
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_mdio.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_mdio.c
index 6bc858cf8..3984840e0 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_mdio.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_mdio.c
@@ -1,7 +1,7 @@
 /*
  *  Atheros AR71xx built-in ethernet mac driver
  *
- *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  *
  *  Based on Atheros' AG7100 driver
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
index 4233152ae..3e3d38326 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
@@ -1,7 +1,7 @@
 /*
  *  Atheros AR71xx built-in ethernet mac driver
  *
- *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  *
  *  Based on Atheros' AG7100 driver