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