From 3fedd14818592016f7ffd84dfe134881b3896ecf Mon Sep 17 00:00:00 2001
From: David Kiliani <mail@davidkiliani.de>
Date: Sat, 1 Nov 2008 00:39:12 +0100
Subject: Staging: Add the Meilhaus ME-IDS driver package

Originally written by Guenter Gebhardt <g.gebhardt@meilhaus.de>
and Krzysztof Gantzke <k.gantzke@meilhaus.de>

This is the drv/lnx/mod directory of ME-IDS 1.2.9 tarball with
some files from drv/lnx/include.

Signed-off-by: David Kiliani <mail@davidkiliani.de>
Cc: Guenter Gebhardt <g.gebhardt@meilhaus.de>
Cc: Krzysztof Gantzke <k.gantzke@meilhaus.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/staging/meilhaus/meslock.h | 73 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 drivers/staging/meilhaus/meslock.h

(limited to 'drivers/staging/meilhaus/meslock.h')

diff --git a/drivers/staging/meilhaus/meslock.h b/drivers/staging/meilhaus/meslock.h
new file mode 100644
index 00000000000..f42b25c3f62
--- /dev/null
+++ b/drivers/staging/meilhaus/meslock.h
@@ -0,0 +1,73 @@
+/**
+ * @file meslock.h
+ *
+ * @brief Provides the subdevice lock class.
+ * @note Copyright (C) 2006 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+#ifndef _MESLOCK_H_
+#define _MESLOCK_H_
+
+#include <linux/spinlock.h>
+
+#ifdef __KERNEL__
+
+/**
+ * @brief The subdevice lock class.
+ */
+typedef struct me_slock {
+	struct file *filep;		/**< Pointer to file structure holding the subdevice. */
+	int count;			/**< Number of tasks which are inside the subdevice. */
+	spinlock_t spin_lock;		/**< Spin lock protecting the attributes from concurrent access. */
+} me_slock_t;
+
+/**
+ * @brief Tries to enter a subdevice.
+ *
+ * @param slock The subdevice lock instance.
+ * @param filep The file structure identifying the calling process.
+ *
+ * @return 0 on success.
+ */
+int me_slock_enter(struct me_slock *slock, struct file *filep);
+
+/**
+ * @brief Exits a subdevice.
+ *
+ * @param slock The subdevice lock instance.
+ * @param filep The file structure identifying the calling process.
+ *
+ * @return 0 on success.
+ */
+int me_slock_exit(struct me_slock *slock, struct file *filep);
+
+/**
+ * @brief Tries to perform a locking action on a subdevice.
+ *
+ * @param slock The subdevice lock instance.
+ * @param filep The file structure identifying the calling process.
+ * @param The action to be done.
+ *
+ * @return 0 on success.
+ */
+int me_slock_lock(struct me_slock *slock, struct file *filep, int lock);
+
+/**
+ * @brief Initializes a lock structure.
+ *
+ * @param slock The lock structure to initialize.
+ * @return 0 on success.
+ */
+int me_slock_init(me_slock_t * slock);
+
+/**
+ * @brief Deinitializes a lock structure.
+ *
+ * @param slock The lock structure to deinitialize.
+ * @return 0 on success.
+ */
+void me_slock_deinit(me_slock_t * slock);
+
+#endif
+#endif
-- 
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