1 files changed, 82 insertions, 0 deletions
diff --git a/drivers/staging/csr/oska/event.c b/drivers/staging/csr/oska/event.c
new file mode 100644
index 000000000000..4aedaaa0d9e4
--- /dev/null
+++ b/drivers/staging/csr/oska/event.c
@@ -0,0 +1,82 @@
+/*
+ * Linux event functions.
+ *
+ * Copyright (C) 2009 Cambridge Silicon Radio Ltd.
+ *
+ * Refer to LICENSE.txt included with this source code for details on
+ * the license terms.
+ */
+#include <linux/module.h>
+#include <linux/sched.h>
+
+#include "event.h"
+
+void os_event_init(os_event_t *evt)
+{
+    init_waitqueue_head(&evt->wq);
+    spin_lock_init(&evt->lock);
+    evt->events = 0;
+}
+EXPORT_SYMBOL(os_event_init);
+
+uint16_t os_event_wait(os_event_t *evt)
+{
+    uint16_t e;
+    unsigned long flags;
+
+    wait_event(evt->wq, evt->events != 0);
+
+    spin_lock_irqsave(&evt->lock, flags);
+    e = evt->events;
+    evt->events &= ~e;
+    spin_unlock_irqrestore(&evt->lock, flags);
+
+    return e;
+}
+EXPORT_SYMBOL(os_event_wait);
+
+uint16_t os_event_wait_interruptible(os_event_t *evt)
+{
+    uint16_t e;
+    unsigned long flags;
+
+    wait_event_interruptible(evt->wq, evt->events != 0);
+
+    spin_lock_irqsave(&evt->lock, flags);
+    e = evt->events;
+    evt->events &= ~e;
+    spin_unlock_irqrestore(&evt->lock, flags);
+
+    return e;
+}
+EXPORT_SYMBOL(os_event_wait_interruptible);
+
+uint16_t os_event_wait_timed(os_event_t *evt, unsigned timeout_ms)
+{
+    uint16_t e;
+    unsigned long flags;
+
+    wait_event_interruptible_timeout(evt->wq,
+                                     evt->events != 0,
+                                     msecs_to_jiffies(timeout_ms));
+
+    spin_lock_irqsave(&evt->lock, flags);
+    e = evt->events;
+    evt->events &= ~e;
+    spin_unlock_irqrestore(&evt->lock, flags);
+
+    return e;
+}
+EXPORT_SYMBOL(os_event_wait_timed);
+
+void os_event_raise(os_event_t *evt, uint16_t events)
+{
+    unsigned long flags;
+
+    spin_lock_irqsave(&evt->lock, flags);
+    evt->events |= events;
+    spin_unlock_irqrestore(&evt->lock, flags);
+
+    wake_up(&evt->wq);
+}
+EXPORT_SYMBOL(os_event_raise);