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