68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
/*
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* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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#include <linux/slab.h>
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#include "gdm_endian.h"
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void gdm_set_endian(struct gdm_endian *ed, u8 dev_endian)
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{
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u8 a[2] = {0x12, 0x34};
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u8 b[2] = {0, };
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u16 c = 0x1234;
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if (dev_endian == ENDIANNESS_BIG)
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ed->dev_ed = ENDIANNESS_BIG;
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else
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ed->dev_ed = ENDIANNESS_LITTLE;
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memcpy(b, &c, 2);
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if (a[0] != b[0])
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ed->host_ed = ENDIANNESS_LITTLE;
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else
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ed->host_ed = ENDIANNESS_BIG;
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}
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u16 gdm_cpu_to_dev16(struct gdm_endian *ed, u16 x)
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{
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if (ed->dev_ed == ed->host_ed)
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return x;
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return Endian16_Swap(x);
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}
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u16 gdm_dev16_to_cpu(struct gdm_endian *ed, u16 x)
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{
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if (ed->dev_ed == ed->host_ed)
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return x;
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return Endian16_Swap(x);
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}
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u32 gdm_cpu_to_dev32(struct gdm_endian *ed, u32 x)
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{
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if (ed->dev_ed == ed->host_ed)
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return x;
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return Endian32_Swap(x);
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}
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u32 gdm_dev32_to_cpu(struct gdm_endian *ed, u32 x)
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{
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if (ed->dev_ed == ed->host_ed)
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return x;
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return Endian32_Swap(x);
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}
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