Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 47 insertions, 0 deletions

diff --git a/drivers/net/wan/x25_asy.h b/drivers/net/wan/x25_asy.h
new file mode 100644
index 000000000..eb4a4216e
--- /dev/null
+++ b/drivers/net/wan/x25_asy.h
@@ -0,0 +1,47 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_X25_ASY_H
+#define _LINUX_X25_ASY_H
+
+/* X.25 asy configuration. */
+#define SL_NRUNIT	256		/* MAX number of X.25 channels;
+					   This can be overridden with
+					   insmod -ox25_asy_maxdev=nnn	*/
+#define SL_MTU		256	
+
+/* X25 async protocol characters. */
+#define X25_END         0x7E		/* indicates end of frame	*/
+#define X25_ESC         0x7D		/* indicates byte stuffing	*/
+#define X25_ESCAPE(x)	((x)^0x20)
+#define X25_UNESCAPE(x)	((x)^0x20)
+
+
+struct x25_asy {
+  int			magic;
+
+  /* Various fields. */
+  spinlock_t		lock;
+  struct tty_struct	*tty;		/* ptr to TTY structure		*/
+  struct net_device	*dev;		/* easy for intr handling	*/
+
+  /* These are pointers to the malloc()ed frame buffers. */
+  unsigned char		*rbuff;		/* receiver buffer		*/
+  int                   rcount;         /* received chars counter       */
+  unsigned char		*xbuff;		/* transmitter buffer		*/
+  unsigned char         *xhead;         /* pointer to next byte to XMIT */
+  int                   xleft;          /* bytes left in XMIT queue     */
+  int                   buffsize;       /* Max buffers sizes            */
+
+  unsigned long		flags;		/* Flag values/ mode etc	*/
+#define SLF_INUSE	0		/* Channel in use               */
+#define SLF_ESCAPE	1               /* ESC received                 */
+#define SLF_ERROR	2               /* Parity, etc. error           */
+#define SLF_OUTWAIT	4		/* Waiting for output		*/
+};
+
+
+
+#define X25_ASY_MAGIC 0x5303
+
+int x25_asy_init(struct net_device *dev);
+
+#endif	/* _LINUX_X25_ASY.H */