drivers/net/hamradio/mkiss.h

   1 /****************************************************************************
   2  *      Defines for the Multi-KISS driver.
   3  ****************************************************************************/
   4
   5 #define AX25_MAXDEV     16              /* MAX number of AX25 channels;
   6                                            This can be overridden with
   7                                            insmod -oax25_maxdev=nnn     */
   8 #define AX_MTU          236
   9
  10 /* SLIP/KISS protocol characters. */
  11 #define END             0300            /* indicates end of frame       */
  12 #define ESC             0333            /* indicates byte stuffing      */
  13 #define ESC_END         0334            /* ESC ESC_END means END 'data' */
  14 #define ESC_ESC         0335            /* ESC ESC_ESC means ESC 'data' */
  15
  16 struct ax_disp {
  17         int                magic;
  18
  19         /* Various fields. */
  20         struct tty_struct  *tty;                /* ptr to TTY structure         */
  21         struct device      *dev;                /* easy for intr handling       */
  22         struct ax_disp     *mkiss;              /* mkiss txport if mkiss channel*/
  23
  24         /* These are pointers to the malloc()ed frame buffers. */
  25         unsigned char      *rbuff;              /* receiver buffer              */
  26         int                rcount;              /* received chars counter       */
  27         unsigned char      *xbuff;              /* transmitter buffer           */
  28         unsigned char      *xhead;              /* pointer to next byte to XMIT */
  29         int                xleft;               /* bytes left in XMIT queue     */
  30
  31         /* SLIP interface statistics. */
  32         unsigned long      rx_packets;          /* inbound frames counter       */
  33         unsigned long      tx_packets;          /* outbound frames counter      */
  34         unsigned long      rx_errors;           /* Parity, etc. errors          */
  35         unsigned long      tx_errors;           /* Planned stuff                */
  36         unsigned long      rx_dropped;          /* No memory for skb            */
  37         unsigned long      tx_dropped;          /* When MTU change              */
  38         unsigned long      rx_over_errors;      /* Frame bigger then SLIP buf.  */
  39
  40         /* Detailed SLIP statistics. */
  41         int                 mtu;                /* Our mtu (to spot changes!)   */
  42         int                 buffsize;           /* Max buffers sizes            */
  43
  44
  45         unsigned char       flags;              /* Flag values/ mode etc        */
  46 #define AXF_INUSE       0               /* Channel in use               */
  47 #define AXF_ESCAPE      1               /* ESC received                 */
  48 #define AXF_ERROR       2               /* Parity, etc. error           */
  49 #define AXF_KEEPTEST    3               /* Keepalive test flag          */
  50 #define AXF_OUTWAIT     4               /* is outpacket was flag        */
  51
  52         int                 mode;
  53         int                 crcmode;    /* MW: for FlexNet, SMACK etc.  */
  54 #define CRC_MODE_NONE   0
  55 #define CRC_MODE_FLEX   1
  56 #define CRC_MODE_SMACK  2
  57 };
  58
  59 #define AX25_MAGIC              0x5316
  60 #define MKISS_DRIVER_MAGIC      1215