LXR linux/include/linux/mtd/cfi

   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#define CFI_HOST_ENDIAN 1
  23#define CFI_LITTLE_ENDIAN 2
  24#define CFI_BIG_ENDIAN 3
  25
  26#if !defined(CONFIG_MTD_CFI_ADV_OPTIONS) || defined(CONFIG_MTD_CFI_NOSWAP)
  27#define CFI_DEFAULT_ENDIAN CFI_HOST_ENDIAN
  28#elif defined(CONFIG_MTD_CFI_LE_BYTE_SWAP)
  29#define CFI_DEFAULT_ENDIAN CFI_LITTLE_ENDIAN
  30#elif defined(CONFIG_MTD_CFI_BE_BYTE_SWAP)
  31#define CFI_DEFAULT_ENDIAN CFI_BIG_ENDIAN
  32#else
  33#error No CFI endianness defined
  34#endif
  35
  36#define cfi_default(s) ((s)?:CFI_DEFAULT_ENDIAN)
  37#define cfi_be(s) (cfi_default(s) == CFI_BIG_ENDIAN)
  38#define cfi_le(s) (cfi_default(s) == CFI_LITTLE_ENDIAN)
  39#define cfi_host(s) (cfi_default(s) == CFI_HOST_ENDIAN)
  40
  41#define cpu_to_cfi8(map, x) (x)
  42#define cfi8_to_cpu(map, x) (x)
  43#define cpu_to_cfi16(map, x) _cpu_to_cfi(16, (map)->swap, (x))
  44#define cpu_to_cfi32(map, x) _cpu_to_cfi(32, (map)->swap, (x))
  45#define cpu_to_cfi64(map, x) _cpu_to_cfi(64, (map)->swap, (x))
  46#define cfi16_to_cpu(map, x) _cfi_to_cpu(16, (map)->swap, (x))
  47#define cfi32_to_cpu(map, x) _cfi_to_cpu(32, (map)->swap, (x))
  48#define cfi64_to_cpu(map, x) _cfi_to_cpu(64, (map)->swap, (x))
  49
  50#define _cpu_to_cfi(w, s, x) (cfi_host(s)?(x):_swap_to_cfi(w, s, x))
  51#define _cfi_to_cpu(w, s, x) (cfi_host(s)?(x):_swap_to_cpu(w, s, x))
  52#define _swap_to_cfi(w, s, x) (cfi_be(s)?cpu_to_be##w(x):cpu_to_le##w(x))
  53#define _swap_to_cpu(w, s, x) (cfi_be(s)?be##w##_to_cpu(x):le##w##_to_cpu(x))
  54