| /* |
| * 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); |
| } |