1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/staging/gdm724x/gdm_endian.c b/drivers/staging/gdm724x/gdm_endian.c
new file mode 100644
index 000000000000..f6cc90ae9ba6
--- /dev/null
+++ b/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);
+}