include/linux/mtd/cfi_endian.h

   1 /*
   2  * Copyright © 2001-2010 David Woodhouse <dwmw2@infradead.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  *
  18  */
  19
  20 #include <asm/byteorder.h>
  21
  22 #ifndef CONFIG_MTD_CFI_ADV_OPTIONS
  23
  24 #define CFI_HOST_ENDIAN
  25
  26 #else
  27
  28 #ifdef CONFIG_MTD_CFI_NOSWAP
  29 #define CFI_HOST_ENDIAN
  30 #endif
  31
  32 #ifdef CONFIG_MTD_CFI_LE_BYTE_SWAP
  33 #define CFI_LITTLE_ENDIAN
  34 #endif
  35
  36 #ifdef CONFIG_MTD_CFI_BE_BYTE_SWAP
  37 #define CFI_BIG_ENDIAN
  38 #endif
  39
  40 #endif
  41
  42 #if defined(CFI_LITTLE_ENDIAN)
  43 #define cpu_to_cfi8(x) (x)
  44 #define cfi8_to_cpu(x) (x)
  45 #define cpu_to_cfi16(x) cpu_to_le16(x)
  46 #define cpu_to_cfi32(x) cpu_to_le32(x)
  47 #define cpu_to_cfi64(x) cpu_to_le64(x)
  48 #define cfi16_to_cpu(x) le16_to_cpu(x)
  49 #define cfi32_to_cpu(x) le32_to_cpu(x)
  50 #define cfi64_to_cpu(x) le64_to_cpu(x)
  51 #elif defined (CFI_BIG_ENDIAN)
  52 #define cpu_to_cfi8(x) (x)
  53 #define cfi8_to_cpu(x) (x)
  54 #define cpu_to_cfi16(x) cpu_to_be16(x)
  55 #define cpu_to_cfi32(x) cpu_to_be32(x)
  56 #define cpu_to_cfi64(x) cpu_to_be64(x)
  57 #define cfi16_to_cpu(x) be16_to_cpu(x)
  58 #define cfi32_to_cpu(x) be32_to_cpu(x)
  59 #define cfi64_to_cpu(x) be64_to_cpu(x)
  60 #elif defined (CFI_HOST_ENDIAN)
  61 #define cpu_to_cfi8(x) (x)
  62 #define cfi8_to_cpu(x) (x)
  63 #define cpu_to_cfi16(x) (x)
  64 #define cpu_to_cfi32(x) (x)
  65 #define cpu_to_cfi64(x) (x)
  66 #define cfi16_to_cpu(x) (x)
  67 #define cfi32_to_cpu(x) (x)
  68 #define cfi64_to_cpu(x) (x)
  69 #else
  70 #error No CFI endianness defined
  71 #endif