LXR linux/include/linux/mtd/cfi

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Copyright © 2001-2010 David Woodhouse <dwmw2@infradead.org>
   4 */
   5
   6#include <asm/byteorder.h>
   7
   8#define CFI_HOST_ENDIAN 1
   9#define CFI_LITTLE_ENDIAN 2
  10#define CFI_BIG_ENDIAN 3
  11
  12#if !defined(CONFIG_MTD_CFI_ADV_OPTIONS) || defined(CONFIG_MTD_CFI_NOSWAP)
  13#define CFI_DEFAULT_ENDIAN CFI_HOST_ENDIAN
  14#elif defined(CONFIG_MTD_CFI_LE_BYTE_SWAP)
  15#define CFI_DEFAULT_ENDIAN CFI_LITTLE_ENDIAN
  16#elif defined(CONFIG_MTD_CFI_BE_BYTE_SWAP)
  17#define CFI_DEFAULT_ENDIAN CFI_BIG_ENDIAN
  18#else
  19#error No CFI endianness defined
  20#endif
  21
  22#define cfi_default(s) ((s)?:CFI_DEFAULT_ENDIAN)
  23#define cfi_be(s) (cfi_default(s) == CFI_BIG_ENDIAN)
  24#define cfi_le(s) (cfi_default(s) == CFI_LITTLE_ENDIAN)
  25#define cfi_host(s) (cfi_default(s) == CFI_HOST_ENDIAN)
  26
  27#define cpu_to_cfi8(map, x) (x)
  28#define cfi8_to_cpu(map, x) (x)
  29#define cpu_to_cfi16(map, x) _cpu_to_cfi(16, (map)->swap, (x))
  30#define cpu_to_cfi32(map, x) _cpu_to_cfi(32, (map)->swap, (x))
  31#define cpu_to_cfi64(map, x) _cpu_to_cfi(64, (map)->swap, (x))
  32#define cfi16_to_cpu(map, x) _cfi_to_cpu(16, (map)->swap, (x))
  33#define cfi32_to_cpu(map, x) _cfi_to_cpu(32, (map)->swap, (x))
  34#define cfi64_to_cpu(map, x) _cfi_to_cpu(64, (map)->swap, (x))
  35
  36#define _cpu_to_cfi(w, s, x) (cfi_host(s)?(x):_swap_to_cfi(w, s, x))
  37#define _cfi_to_cpu(w, s, x) (cfi_host(s)?(x):_swap_to_cpu(w, s, x))
  38#define _swap_to_cfi(w, s, x) (cfi_be(s)?cpu_to_be##w(x):cpu_to_le##w(x))
  39#define _swap_to_cpu(w, s, x) (cfi_be(s)?be##w##_to_cpu(x):le##w##_to_cpu(x))
  40