From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/staging/gdm724x/gdm_endian.c | 67 ++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 drivers/staging/gdm724x/gdm_endian.c (limited to 'drivers/staging/gdm724x/gdm_endian.c') diff --git a/drivers/staging/gdm724x/gdm_endian.c b/drivers/staging/gdm724x/gdm_endian.c new file mode 100644 index 000000000..f6cc90ae9 --- /dev/null +++ b/drivers/staging/gdm724x/gdm_endian.c @@ -0,0 +1,67 @@ +/* + * 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 +#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); +} -- cgit v1.2.3-54-g00ecf