License cleanup: add SPDX GPL-2.0 license identifier to files with no license
[sfrench/cifs-2.6.git] / drivers / net / wan / x25_asy.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_X25_ASY_H
3 #define _LINUX_X25_ASY_H
4
5 /* X.25 asy configuration. */
6 #define SL_NRUNIT       256             /* MAX number of X.25 channels;
7                                            This can be overridden with
8                                            insmod -ox25_asy_maxdev=nnn  */
9 #define SL_MTU          256     
10
11 /* X25 async protocol characters. */
12 #define X25_END         0x7E            /* indicates end of frame       */
13 #define X25_ESC         0x7D            /* indicates byte stuffing      */
14 #define X25_ESCAPE(x)   ((x)^0x20)
15 #define X25_UNESCAPE(x) ((x)^0x20)
16
17
18 struct x25_asy {
19   int                   magic;
20
21   /* Various fields. */
22   spinlock_t            lock;
23   struct tty_struct     *tty;           /* ptr to TTY structure         */
24   struct net_device     *dev;           /* easy for intr handling       */
25
26   /* These are pointers to the malloc()ed frame buffers. */
27   unsigned char         *rbuff;         /* receiver buffer              */
28   int                   rcount;         /* received chars counter       */
29   unsigned char         *xbuff;         /* transmitter buffer           */
30   unsigned char         *xhead;         /* pointer to next byte to XMIT */
31   int                   xleft;          /* bytes left in XMIT queue     */
32   int                   buffsize;       /* Max buffers sizes            */
33
34   unsigned long         flags;          /* Flag values/ mode etc        */
35 #define SLF_INUSE       0               /* Channel in use               */
36 #define SLF_ESCAPE      1               /* ESC received                 */
37 #define SLF_ERROR       2               /* Parity, etc. error           */
38 #define SLF_OUTWAIT     4               /* Waiting for output           */
39 };
40
41
42
43 #define X25_ASY_MAGIC 0x5303
44
45 int x25_asy_init(struct net_device *dev);
46
47 #endif  /* _LINUX_X25_ASY.H */