1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/staging/tidspbridge/include/dspbridge/sync.h b/drivers/staging/tidspbridge/include/dspbridge/sync.h
new file mode 100644
index 000000000000..e2651e7b1c42
--- /dev/null
+++ b/drivers/staging/tidspbridge/include/dspbridge/sync.h
@@ -0,0 +1,109 @@
+/*
+ * sync.h
+ *
+ * DSP-BIOS Bridge driver support functions for TI OMAP processors.
+ *
+ * Provide synchronization services.
+ *
+ * Copyright (C) 2005-2006 Texas Instruments, Inc.
+ *
+ * This package 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.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef _SYNC_H
+#define _SYNC_H
+
+#include <dspbridge/dbdefs.h>
+
+
+/* Special timeout value indicating an infinite wait: */
+#define SYNC_INFINITE  0xffffffff
+
+/**
+ * struct sync_object - the basic sync_object structure
+ * @comp:	use to signal events
+ * @multi_comp:	use to signal multiple events.
+ *
+ */
+struct sync_object{
+	struct completion comp;
+	struct completion *multi_comp;
+};
+
+/**
+ * sync_init_event() - set initial state for a sync_event element
+ * @event:	event to be initialized.
+ *
+ * Set the initial state for a sync_event element.
+ */
+
+static inline void sync_init_event(struct sync_object *event)
+{
+	init_completion(&event->comp);
+	event->multi_comp = NULL;
+}
+
+/**
+ * sync_reset_event() - reset a sync_event element
+ * @event:	event to be reset.
+ *
+ * This function reset to the initial state to @event.
+ */
+
+static inline void sync_reset_event(struct sync_object *event)
+{
+	INIT_COMPLETION(event->comp);
+	event->multi_comp = NULL;
+}
+
+/**
+ * sync_set_event() - set or signal and specified event
+ * @event:	Event to be set..
+ *
+ * set the @event, if there is an thread waiting for the event
+ * it will be waken up, this function only wakes one thread.
+ */
+
+void sync_set_event(struct sync_object *event);
+
+/**
+ * sync_wait_on_event() - waits for a event to be set.
+ * @event:	events to wait for it.
+ * @timeout	timeout on waiting for the evetn.
+ *
+ * This functios will wait until @event is set or until timeout. In case of
+ * success the function will return 0 and
+ * in case of timeout the function will return -ETIME
+ */
+
+static inline int sync_wait_on_event(struct sync_object *event,
+							unsigned timeout)
+{
+	return wait_for_completion_timeout(&event->comp,
+		msecs_to_jiffies(timeout)) ? 0 : -ETIME;
+}
+
+/**
+ * sync_wait_on_multiple_events() - waits for multiple events to be set.
+ * @events:	Array of events to wait for them.
+ * @count:	number of elements of the array.
+ * @timeout	timeout on waiting for the evetns.
+ * @pu_index	index of the event set.
+ *
+ * This functios will wait until any of the array element is set or until
+ * timeout. In case of success the function will return 0 and
+ * @pu_index will store the index of the array element set and in case
+ * of timeout the function will return -ETIME.
+ */
+
+int sync_wait_on_multiple_events(struct sync_object **events,
+				     unsigned count, unsigned timeout,
+				     unsigned *index);
+
+#endif /* _SYNC_H */