Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / gdm724x / gdm_endian.c

diff --git a/kernel/drivers/staging/gdm724x/gdm_endian.c b/kernel/drivers/staging/gdm724x/gdm_endian.c
new file mode 100644 (file)
index 0000000..f6cc90a
--- /dev/null
+++ b/kernel/drivers/staging/gdm724x/gdm_endian.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/slab.h>
+#include "gdm_endian.h"
+
+void gdm_set_endian(struct gdm_endian *ed, u8 dev_endian)
+{
+       u8 a[2] = {0x12, 0x34};
+       u8 b[2] = {0, };
+       u16 c = 0x1234;
+
+       if (dev_endian == ENDIANNESS_BIG)
+               ed->dev_ed = ENDIANNESS_BIG;
+       else
+               ed->dev_ed = ENDIANNESS_LITTLE;
+
+       memcpy(b, &c, 2);
+
+       if (a[0] != b[0])
+               ed->host_ed = ENDIANNESS_LITTLE;
+       else
+               ed->host_ed = ENDIANNESS_BIG;
+
+}
+
+u16 gdm_cpu_to_dev16(struct gdm_endian *ed, u16 x)
+{
+       if (ed->dev_ed == ed->host_ed)
+               return x;
+
+       return Endian16_Swap(x);
+}
+
+u16 gdm_dev16_to_cpu(struct gdm_endian *ed, u16 x)
+{
+       if (ed->dev_ed == ed->host_ed)
+               return x;
+
+       return Endian16_Swap(x);
+}
+
+u32 gdm_cpu_to_dev32(struct gdm_endian *ed, u32 x)
+{
+       if (ed->dev_ed == ed->host_ed)
+               return x;
+
+       return Endian32_Swap(x);
+}
+
+u32 gdm_dev32_to_cpu(struct gdm_endian *ed, u32 x)
+{
+       if (ed->dev_ed == ed->host_ed)
+               return x;
+
+       return Endian32_Swap(x);
+}