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| author |   Jan Nikitenko <jan.nikitenko@gmail.com> | 2007-07-17 04:04:03 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-17 10:23:04 -0700 |
| commit | ad241528c4919505afccb022acbab3eeb0db4d80 (patch) | |
| tree | ec3a2a65707ca032eab973f98aa568ed007389f1 /include/linux/crc7.h | |
| parent | SPI: add 3wire mode flag (diff) | |
| download | linux-dev-ad241528c4919505afccb022acbab3eeb0db4d80.tar.xz linux-dev-ad241528c4919505afccb022acbab3eeb0db4d80.zip | |
CRC7 support
Add CRC7 routines, used for example in MMC over SPI communication.
Kerneldoc updates
[akpm@linux-foundation.org: fix funny mix of const and non-const]
Signed-off-by: Jan Nikitenko <jan.nikitenko@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/crc7.h')
| -rw-r--r-- | include/linux/crc7.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/crc7.h b/include/linux/crc7.h new file mode 100644 index 000000000000..1786e772d5c6 --- /dev/null +++ b/include/linux/crc7.h @@ -0,0 +1,14 @@ +#ifndef _LINUX_CRC7_H +#define _LINUX_CRC7_H +#include <linux/types.h> + +extern const u8 crc7_syndrome_table[256]; + +static inline u8 crc7_byte(u8 crc, u8 data) +{ + return crc7_syndrome_table[(crc << 1) ^ data]; +} + +extern u8 crc7(u8 crc, const u8 *buffer, size_t len); + +#endif |