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