1 files changed, 62 insertions, 0 deletions

diff --git a/drivers/isdn/hisax/st5481_hdlc.h b/drivers/isdn/hisax/st5481_hdlc.h
new file mode 100644
index 000000000000..495432f0f6ba
--- /dev/null
+++ b/drivers/isdn/hisax/st5481_hdlc.h
@@ -0,0 +1,62 @@
+/*
+ * Driver for ST5481 USB ISDN modem
+ *
+ * Author       Frode Isaksen
+ * Copyright    2001 by Frode Isaksen      <fisaksen@bewan.com>
+ *              2001 by Kai Germaschewski  <kai.germaschewski@gmx.de>
+ * 
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ */
+
+#ifndef __ST5481_HDLC_H__
+#define __ST5481_HDLC_H__
+
+struct hdlc_vars {
+        int bit_shift; 
+        int hdlc_bits1;
+        int data_bits;
+        int ffbit_shift; // encoding only
+        int state;
+        int dstpos;
+
+        int data_received:1; // set if transferring data
+        int dchannel:1; // set if D channel (send idle instead of flags)
+        int do_adapt56:1; // set if 56K adaptation
+        int do_closing:1; // set if in closing phase (need to send CRC + flag
+
+        unsigned short crc;
+
+        unsigned char cbin; 
+        unsigned char shift_reg;
+        unsigned char ffvalue;
+        
+};
+
+
+/*
+  The return value from hdlc_decode is
+  the frame length, 0 if no complete frame was decoded,
+  or a negative error number
+*/
+
+#define HDLC_FRAMING_ERROR     1
+#define HDLC_CRC_ERROR         2
+#define HDLC_LENGTH_ERROR      3
+
+void 
+hdlc_rcv_init(struct hdlc_vars *hdlc, int do_adapt56);
+
+int
+hdlc_decode(struct hdlc_vars *hdlc, const unsigned char *src, int slen,int *count, 
+            unsigned char *dst, int dsize);
+
+void 
+hdlc_out_init(struct hdlc_vars *hdlc,int is_d_channel,int do_adapt56);
+
+int 
+hdlc_encode(struct hdlc_vars *hdlc,const unsigned char *src,unsigned short slen,int *count,
+            unsigned char *dst,int dsize);
+
+#endif