ISDN: Add support for none reverse bitstreams to isdnhdc

The original isdnhdlc code was developed for devices which had
reversed bitorder in the byte stream. Adding code to handle normal
bitstreams as well.

Signed-off-by: Karsten Keil <keil@b1-systems.de>

1 files changed, 9 insertions, 3 deletions

diff --git a/include/linux/isdn/hdlc.h b/include/linux/isdn/hdlc.h
index 8f3540c7f692..4b3ecc40889a 100644
--- a/include/linux/isdn/hdlc.h
+++ b/include/linux/isdn/hdlc.h
@@ -6,6 +6,7 @@
  * controllers.
  *
  * Copyright (C)
+ *      2009    Karsten Keil            <keil@b1-systems.de>
  *      2002    Wolfgang Mües          <wolfgang@iksw-muees.de>
  *      2001    Frode Isaksen           <fisaksen@bewan.com>
  *      2001    Kai Germaschewski       <kai.germaschewski@gmx.de>
@@ -50,8 +51,14 @@ struct isdnhdlc_vars {
         u32 do_adapt56:1;
         /* set if in closing phase (need to send CRC + flag) */
         u32 do_closing:1;
+        /* set if data is bitreverse */
+        u32 do_bitreverse:1;
 };
 
+/* Feature Flags */
+#define HDLC_56KBIT     0x01
+#define HDLC_DCHANNEL   0x02
+#define HDLC_BITREVERSE 0x04
 
 /*
   The return value from isdnhdlc_decode is
@@ -62,13 +69,12 @@ struct isdnhdlc_vars {
 #define HDLC_CRC_ERROR         2
 #define HDLC_LENGTH_ERROR      3
 
-extern void     isdnhdlc_rcv_init(struct isdnhdlc_vars *hdlc, int do_adapt56);
+extern void     isdnhdlc_rcv_init(struct isdnhdlc_vars *hdlc, u32 features);
 
 extern int      isdnhdlc_decode(struct isdnhdlc_vars *hdlc, const u8 *src,
                         int slen, int *count, u8 *dst, int dsize);
 
-extern void     isdnhdlc_out_init(struct isdnhdlc_vars *hdlc, int is_d_channel,
-                        int do_adapt56);
+extern void     isdnhdlc_out_init(struct isdnhdlc_vars *hdlc, u32 features);
 
 extern int      isdnhdlc_encode(struct isdnhdlc_vars *hdlc, const u8 *src,
                         u16 slen, int *count, u8 *dst, int dsize);