1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/staging/tidspbridge/services/sync.c b/drivers/staging/tidspbridge/services/sync.c
new file mode 100644
index 000000000000..9010b37bf5b1
--- /dev/null
+++ b/drivers/staging/tidspbridge/services/sync.c
@@ -0,0 +1,104 @@
+/*
+ * sync.c
+ *
+ * DSP-BIOS Bridge driver support functions for TI OMAP processors.
+ *
+ * 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.
+ */
+
+/*  ----------------------------------- Host OS */
+#include <dspbridge/host_os.h>
+
+/*  ----------------------------------- This */
+#include <dspbridge/sync.h>
+
+DEFINE_SPINLOCK(sync_lock);
+
+/**
+ * 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)
+{
+	spin_lock_bh(&sync_lock);
+	complete(&event->comp);
+	if (event->multi_comp)
+		complete(event->multi_comp);
+	spin_unlock_bh(&sync_lock);
+}
+
+/**
+ * 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 or in case
+ * of timeout the function will return -ETIME or in case of
+ * interrupting by a signal it will return -EPERM.
+ */
+
+int sync_wait_on_multiple_events(struct sync_object **events,
+				     unsigned count, unsigned timeout,
+				     unsigned *index)
+{
+	unsigned i;
+	int status = -EPERM;
+	struct completion m_comp;
+
+	init_completion(&m_comp);
+
+	if (SYNC_INFINITE == timeout)
+		timeout = MAX_SCHEDULE_TIMEOUT;
+
+	spin_lock_bh(&sync_lock);
+	for (i = 0; i < count; i++) {
+		if (completion_done(&events[i]->comp)) {
+			INIT_COMPLETION(events[i]->comp);
+			*index = i;
+			spin_unlock_bh(&sync_lock);
+			status = 0;
+			goto func_end;
+		}
+	}
+
+	for (i = 0; i < count; i++)
+		events[i]->multi_comp = &m_comp;
+
+	spin_unlock_bh(&sync_lock);
+
+	if (!wait_for_completion_interruptible_timeout(&m_comp,
+					msecs_to_jiffies(timeout)))
+		status = -ETIME;
+
+	spin_lock_bh(&sync_lock);
+	for (i = 0; i < count; i++) {
+		if (completion_done(&events[i]->comp)) {
+			INIT_COMPLETION(events[i]->comp);
+			*index = i;
+			status = 0;
+		}
+		events[i]->multi_comp = NULL;
+	}
+	spin_unlock_bh(&sync_lock);
+func_end:
+	return status;
+}
+