kernel/drivers/staging/gdm724x/gdm_endian.c

   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 #include <linux/kernel.h>
  15 #include "gdm_endian.h"
  16
  17 void gdm_set_endian(struct gdm_endian *ed, u8 dev_endian)
  18 {
  19         if (dev_endian == ENDIANNESS_BIG)
  20                 ed->dev_ed = ENDIANNESS_BIG;
  21         else
  22                 ed->dev_ed = ENDIANNESS_LITTLE;
  23 }
  24
  25 u16 gdm_cpu_to_dev16(struct gdm_endian *ed, u16 x)
  26 {
  27         if (ed->dev_ed == ENDIANNESS_LITTLE)
  28                 return cpu_to_le16(x);
  29         else
  30                 return cpu_to_be16(x);
  31 }
  32
  33 u16 gdm_dev16_to_cpu(struct gdm_endian *ed, u16 x)
  34 {
  35         if (ed->dev_ed == ENDIANNESS_LITTLE)
  36                 return le16_to_cpu(x);
  37         else
  38                 return be16_to_cpu(x);
  39 }
  40
  41 u32 gdm_cpu_to_dev32(struct gdm_endian *ed, u32 x)
  42 {
  43         if (ed->dev_ed == ENDIANNESS_LITTLE)
  44                 return cpu_to_le32(x);
  45         else
  46                 return cpu_to_be32(x);
  47 }
  48
  49 u32 gdm_dev32_to_cpu(struct gdm_endian *ed, u32 x)
  50 {
  51         if (ed->dev_ed == ENDIANNESS_LITTLE)
  52                 return le32_to_cpu(x);
  53         else
  54                 return be32_to_cpu(x);
  55 }