lib/crc16.c: Rename cyg_crc16() to crc16_ccitt() and add crc start value
The original name of this function is unclear. This patch renames this
CRC16 function to crc16_ccitt() matching its name with its
implementation.
To make the usage of this function more flexible, lets add the CRC start
value as parameter to this function. This way it can be used by other
functions requiring different start values than 0 as well.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/include/crc.h b/include/crc.h
index 5085d4e..b0031b2 100644
--- a/include/crc.h
+++ b/include/crc.h
@@ -62,8 +62,8 @@
extern uint32_t
cyg_ether_crc32_accumulate(uint32_t crc, unsigned char *s, int len);
-/* 16 bit CRC with polynomial x^16+x^12+x^5+1 */
+/* 16 bit CRC with polynomial x^16+x^12+x^5+1 (CRC-CCITT) */
-extern uint16_t cyg_crc16(unsigned char *s, int len);
+uint16_t crc16_ccitt(uint16_t crc_start, unsigned char *s, int len);
#endif /* _SERVICES_CRC_CRC_H_ */