drivers/staging/gdm724x/gdm_endian.h

   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__*/