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/*
* Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/slab.h>
#include "gdm_endian.h"
void gdm_set_endian(struct gdm_endian *ed, u8 dev_endian)
{
u8 a[2] = {0x12, 0x34};
u8 b[2] = {0, };
u16 c = 0x1234;
if (dev_endian == ENDIANNESS_BIG)
ed->dev_ed = ENDIANNESS_BIG;
else
ed->dev_ed = ENDIANNESS_LITTLE;
memcpy(b, &c, 2);
if (a[0] != b[0])
ed->host_ed = ENDIANNESS_LITTLE;
else
ed->host_ed = ENDIANNESS_BIG;
}
u16 gdm_cpu_to_dev16(struct gdm_endian *ed, u16 x)
{
if (ed->dev_ed == ed->host_ed)
return x;
return Endian16_Swap(x);
}
u16 gdm_dev16_to_cpu(struct gdm_endian *ed, u16 x)
{
if (ed->dev_ed == ed->host_ed)
return x;
return Endian16_Swap(x);
}
u32 gdm_cpu_to_dev32(struct gdm_endian *ed, u32 x)
{
if (ed->dev_ed == ed->host_ed)
return x;
return Endian32_Swap(x);
}
u32 gdm_dev32_to_cpu(struct gdm_endian *ed, u32 x)
{
if (ed->dev_ed == ed->host_ed)
return x;
return Endian32_Swap(x);
}
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