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1da177e4 LT |
1 | /********************************************************************* |
2 | * | |
3 | * Filename: crc.h | |
4 | * Version: | |
5 | * Description: CRC routines | |
6 | * Status: Experimental. | |
7 | * Author: Dag Brattli <dagb@cs.uit.no> | |
8 | * Created at: Mon Aug 4 20:40:53 1997 | |
9 | * Modified at: Sun May 2 20:25:23 1999 | |
10 | * Modified by: Dag Brattli <dagb@cs.uit.no> | |
11 | * | |
12 | ********************************************************************/ | |
13 | ||
14 | #ifndef IRDA_CRC_H | |
15 | #define IRDA_CRC_H | |
16 | ||
17 | #include <linux/types.h> | |
18 | #include <linux/crc-ccitt.h> | |
19 | ||
20 | #define INIT_FCS 0xffff /* Initial FCS value */ | |
21 | #define GOOD_FCS 0xf0b8 /* Good final FCS value */ | |
22 | ||
23 | /* Recompute the FCS with one more character appended. */ | |
24 | #define irda_fcs(fcs, c) crc_ccitt_byte(fcs, c) | |
25 | ||
26 | /* Recompute the FCS with len bytes appended. */ | |
27 | #define irda_calc_crc16(fcs, buf, len) crc_ccitt(fcs, buf, len) | |
28 | ||
29 | #endif |