1 /*
2  * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
3  *
4  * This software is licensed under the terms of the GNU General Public
5  * License version 2, as published by the Free Software Foundation, and
6  * may be copied, distributed, and modified under those terms.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  */
13 
14 #ifndef __GDM_ENDIAN_H__
15 #define __GDM_ENDIAN_H__
16 
17 #include <linux/types.h>
18 
19 #define Endian16_Swap(value) \
20 	((((u16)((value) & 0x00FF)) << 8) | \
21 	 (((u16)((value) & 0xFF00)) >> 8))
22 
23 #define Endian32_Swap(value) \
24 	((((u32)((value) & 0x000000FF)) << 24) | \
25 	 (((u32)((value) & 0x0000FF00)) << 8) | \
26 	 (((u32)((value) & 0x00FF0000)) >> 8) | \
27 	 (((u32)((value) & 0xFF000000)) >> 24))
28 
29 enum {
30 	ENDIANNESS_MIN = 0,
31 	ENDIANNESS_UNKNOWN,
32 	ENDIANNESS_LITTLE,
33 	ENDIANNESS_BIG,
34 	ENDIANNESS_MIDDLE,
35 	ENDIANNESS_MAX
36 };
37 
38 struct gdm_endian {
39 	u8 dev_ed;
40 	u8 host_ed;
41 };
42 
43 void gdm_set_endian(struct gdm_endian *ed, u8 dev_endian);
44 u16 gdm_cpu_to_dev16(struct gdm_endian *ed, u16 x);
45 u16 gdm_dev16_to_cpu(struct gdm_endian *ed, u16 x);
46 u32 gdm_cpu_to_dev32(struct gdm_endian *ed, u32 x);
47 u32 gdm_dev32_to_cpu(struct gdm_endian *ed, u32 x);
48 
49 #endif /*__GDM_ENDIAN_H__*/
50