1 files changed, 148 insertions, 0 deletions
diff --git a/drivers/staging/csr/csr_framework_ext.c b/drivers/staging/csr/csr_framework_ext.c
new file mode 100644
index 000000000000..12e7ddf3220a
--- /dev/null
+++ b/drivers/staging/csr/csr_framework_ext.c
@@ -0,0 +1,148 @@
+/*****************************************************************************
+
+            (c) Cambridge Silicon Radio Limited 2010
+            All rights reserved and confidential information of CSR
+
+            Refer to LICENSE.txt included with this source for details
+            on the license terms.
+
+*****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 34)
+#include <linux/slab.h>
+#endif
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 19)
+#include <linux/freezer.h>
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 27)
+#include <asm/semaphore.h>
+#else
+#include <linux/semaphore.h>
+#endif
+
+#include <linux/bitops.h>
+
+#include "csr_framework_ext.h"
+#include "csr_panic.h"
+
+/*----------------------------------------------------------------------------*
+ *  NAME
+ *      CsrMutexCreate
+ *
+ *  DESCRIPTION
+ *      Create a mutex and return a handle to the created mutex.
+ *
+ *  RETURNS
+ *      Possible values:
+ *          CSR_RESULT_SUCCESS           in case of success
+ *          CSR_FE_RESULT_NO_MORE_MUTEXES   in case of out of mutex resources
+ *          CSR_FE_RESULT_INVALID_POINTER   in case the mutexHandle pointer is invalid
+ *
+ *----------------------------------------------------------------------------*/
+CsrResult CsrMutexCreate(CsrMutexHandle *mutexHandle)
+{
+    if (mutexHandle == NULL)
+    {
+        return CSR_FE_RESULT_INVALID_POINTER;
+    }
+
+    sema_init(mutexHandle, 1);
+
+    return CSR_RESULT_SUCCESS;
+}
+
+/*----------------------------------------------------------------------------*
+ *  NAME
+ *      CsrMutexDestroy
+ *
+ *  DESCRIPTION
+ *      Destroy the previously created mutex.
+ *
+ *  RETURNS
+ *      void
+ *
+ *----------------------------------------------------------------------------*/
+void CsrMutexDestroy(CsrMutexHandle *mutexHandle)
+{
+}
+
+/*----------------------------------------------------------------------------*
+ *  NAME
+ *      CsrMutexLock
+ *
+ *  DESCRIPTION
+ *      Lock the mutex refered to by the provided handle.
+ *
+ *  RETURNS
+ *      Possible values:
+ *          CSR_RESULT_SUCCESS           in case of success
+ *          CSR_FE_RESULT_INVALID_HANDLE    in case the mutexHandle is invalid
+ *
+ *----------------------------------------------------------------------------*/
+CsrResult CsrMutexLock(CsrMutexHandle *mutexHandle)
+{
+    if (mutexHandle == NULL)
+    {
+        return CSR_FE_RESULT_INVALID_POINTER;
+    }
+
+    if (down_interruptible(mutexHandle))
+    {
+        CsrPanic(CSR_TECH_FW, CSR_PANIC_FW_UNEXPECTED_VALUE, "CsrMutexLock Failed");
+        return CSR_FE_RESULT_INVALID_POINTER;
+    }
+
+    return CSR_RESULT_SUCCESS;
+}
+
+/*----------------------------------------------------------------------------*
+ *  NAME
+ *      CsrMutexUnlock
+ *
+ *  DESCRIPTION
+ *      Unlock the mutex refered to by the provided handle.
+ *
+ *  RETURNS
+ *      Possible values:
+ *          CSR_RESULT_SUCCESS           in case of success
+ *          CSR_FE_RESULT_INVALID_HANDLE    in case the mutexHandle is invalid
+ *
+ *----------------------------------------------------------------------------*/
+CsrResult CsrMutexUnlock(CsrMutexHandle *mutexHandle)
+{
+    if (mutexHandle == NULL)
+    {
+        return CSR_FE_RESULT_INVALID_POINTER;
+    }
+
+    up(mutexHandle);
+
+    return CSR_RESULT_SUCCESS;
+}
+
+/*----------------------------------------------------------------------------*
+ *  NAME
+ *      CsrThreadSleep
+ *
+ *  DESCRIPTION
+ *      Sleep for a given period.
+ *
+ *  RETURNS
+ *      void
+ *
+ *----------------------------------------------------------------------------*/
+void CsrThreadSleep(u16 sleepTimeInMs)
+{
+    unsigned long t;
+
+    /* Convert t in ms to jiffies and round up */
+    t = ((sleepTimeInMs * HZ) + 999) / 1000;
+    schedule_timeout_uninterruptible(t);
+}
+EXPORT_SYMBOL_GPL(CsrThreadSleep);