diff options
author | Karsten Keil <keil@b1-systems.de> | 2009-07-08 08:21:12 -0400 |
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committer | Karsten Keil <keil@b1-systems.de> | 2009-07-25 14:15:21 -0400 |
commit | cb3824bade2549d7ad059d5802da43312540fdee (patch) | |
tree | 0ffcce666a8d3534f48ffa162defecf7e781c8ba /include | |
parent | 74d154189d597b91da4322996dbf4f5c3d1544ab (diff) |
ISDN: Make isdnhdlc usable for other ISDN drivers
isdnhdlc is useful for other ISDN drivers as well.
Move the include file to a central location and the source
to the central isdn location.
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/isdn/hdlc.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/include/linux/isdn/hdlc.h b/include/linux/isdn/hdlc.h new file mode 100644 index 000000000000..cf0a95a24015 --- /dev/null +++ b/include/linux/isdn/hdlc.h | |||
@@ -0,0 +1,70 @@ | |||
1 | /* | ||
2 | * isdnhdlc.h -- General purpose ISDN HDLC decoder. | ||
3 | * | ||
4 | * Implementation of a HDLC decoder/encoder in software. | ||
5 | * Neccessary because some ISDN devices don't have HDLC | ||
6 | * controllers. Also included: a bit reversal table. | ||
7 | * | ||
8 | *Copyright (C) 2002 Wolfgang Mües <wolfgang@iksw-muees.de> | ||
9 | * 2001 Frode Isaksen <fisaksen@bewan.com> | ||
10 | * 2001 Kai Germaschewski <kai.germaschewski@gmx.de> | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or modify | ||
13 | * it under the terms of the GNU General Public License as published by | ||
14 | * the Free Software Foundation; either version 2 of the License, or | ||
15 | * (at your option) any later version. | ||
16 | * | ||
17 | * This program is distributed in the hope that it will be useful, | ||
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
20 | * GNU General Public License for more details. | ||
21 | * | ||
22 | * You should have received a copy of the GNU General Public License | ||
23 | * along with this program; if not, write to the Free Software | ||
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
25 | */ | ||
26 | |||
27 | #ifndef __ISDNHDLC_H__ | ||
28 | #define __ISDNHDLC_H__ | ||
29 | |||
30 | struct isdnhdlc_vars { | ||
31 | int bit_shift; | ||
32 | int hdlc_bits1; | ||
33 | int data_bits; | ||
34 | int ffbit_shift; // encoding only | ||
35 | int state; | ||
36 | int dstpos; | ||
37 | |||
38 | unsigned short crc; | ||
39 | |||
40 | unsigned char cbin; | ||
41 | unsigned char shift_reg; | ||
42 | unsigned char ffvalue; | ||
43 | |||
44 | unsigned int data_received:1; // set if transferring data | ||
45 | unsigned int dchannel:1; // set if D channel (send idle instead of flags) | ||
46 | unsigned int do_adapt56:1; // set if 56K adaptation | ||
47 | unsigned int do_closing:1; // set if in closing phase (need to send CRC + flag | ||
48 | }; | ||
49 | |||
50 | |||
51 | /* | ||
52 | The return value from isdnhdlc_decode is | ||
53 | the frame length, 0 if no complete frame was decoded, | ||
54 | or a negative error number | ||
55 | */ | ||
56 | #define HDLC_FRAMING_ERROR 1 | ||
57 | #define HDLC_CRC_ERROR 2 | ||
58 | #define HDLC_LENGTH_ERROR 3 | ||
59 | |||
60 | extern void isdnhdlc_rcv_init (struct isdnhdlc_vars *hdlc, int do_adapt56); | ||
61 | |||
62 | extern int isdnhdlc_decode (struct isdnhdlc_vars *hdlc, const unsigned char *src, int slen,int *count, | ||
63 | unsigned char *dst, int dsize); | ||
64 | |||
65 | extern void isdnhdlc_out_init (struct isdnhdlc_vars *hdlc,int is_d_channel,int do_adapt56); | ||
66 | |||
67 | extern int isdnhdlc_encode (struct isdnhdlc_vars *hdlc,const unsigned char *src,unsigned short slen,int *count, | ||
68 | unsigned char *dst,int dsize); | ||
69 | |||
70 | #endif /* __ISDNHDLC_H__ */ | ||