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8e987465a1
This patch allows each CFI device map to use its own endianness. The globally defined CFI endianness (CONFIG_MTD_CFI_NOSWAP, CONFIG_MTD_CFI_BE_BYTE_SWAP or CONFIG_MTD_CFI_LE_BYTE_SWAP) becomes the default value which can be overridden by a driver for a particular device. Signed-off-by: Aaron Sierra <asierra@xes-inc.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
53 lines
2.1 KiB
C
53 lines
2.1 KiB
C
/*
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* Copyright © 2001-2010 David Woodhouse <dwmw2@infradead.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <asm/byteorder.h>
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#define CFI_HOST_ENDIAN 1
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#define CFI_LITTLE_ENDIAN 2
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#define CFI_BIG_ENDIAN 3
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#if !defined(CONFIG_MTD_CFI_ADV_OPTIONS) || defined(CONFIG_MTD_CFI_NOSWAP)
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#define CFI_DEFAULT_ENDIAN CFI_HOST_ENDIAN
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#elif defined(CONFIG_MTD_CFI_LE_BYTE_SWAP)
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#define CFI_DEFAULT_ENDIAN CFI_LITTLE_ENDIAN
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#elif defined(CONFIG_MTD_CFI_BE_BYTE_SWAP)
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#define CFI_DEFAULT_ENDIAN CFI_BIG_ENDIAN
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#else
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#error No CFI endianness defined
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#endif
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#define cfi_default(s) ((s)?:CFI_DEFAULT_ENDIAN)
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#define cfi_be(s) (cfi_default(s) == CFI_BIG_ENDIAN)
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#define cfi_le(s) (cfi_default(s) == CFI_LITTLE_ENDIAN)
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#define cfi_host(s) (cfi_default(s) == CFI_HOST_ENDIAN)
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#define cpu_to_cfi8(map, x) (x)
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#define cfi8_to_cpu(map, x) (x)
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#define cpu_to_cfi16(map, x) _cpu_to_cfi(16, (map)->swap, (x))
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#define cpu_to_cfi32(map, x) _cpu_to_cfi(32, (map)->swap, (x))
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#define cpu_to_cfi64(map, x) _cpu_to_cfi(64, (map)->swap, (x))
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#define cfi16_to_cpu(map, x) _cfi_to_cpu(16, (map)->swap, (x))
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#define cfi32_to_cpu(map, x) _cfi_to_cpu(32, (map)->swap, (x))
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#define cfi64_to_cpu(map, x) _cfi_to_cpu(64, (map)->swap, (x))
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#define _cpu_to_cfi(w, s, x) (cfi_host(s)?(x):_swap_to_cfi(w, s, x))
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#define _cfi_to_cpu(w, s, x) (cfi_host(s)?(x):_swap_to_cpu(w, s, x))
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#define _swap_to_cfi(w, s, x) (cfi_be(s)?cpu_to_be##w(x):cpu_to_le##w(x))
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#define _swap_to_cpu(w, s, x) (cfi_be(s)?be##w##_to_cpu(x):le##w##_to_cpu(x))
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