drivers/net/hamradio/6pack.h

   1 /*
   2  * 6pack.h      Define the 6pack device driver interface and constants.
   3  *
   4  * NOTE:        THIS FILE WILL BE MOVED TO THE LINUX INCLUDE DIRECTORY
   5  *              AS SOON AS POSSIBLE!
   6  *
   7  * Version:     @(#)6pack.h     0.3.0   04/07/98
   8  *
   9  * Fixes:
  10  *
  11  * Author:      Andreas Könsgen <ajk@iehk.rwth-aachen.de>
  12  *
  13  *              This file is derived from slip.h, written by
  14  *              Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
  15  */
  16
  17 #ifndef _LINUX_6PACK_H
  18 #define _LINUX_6PACK_H
  19
  20 #define SIXPACK_VERSION    "Revision: 0.3.0"
  21
  22 #ifdef __KERNEL__
  23
  24 /* sixpack priority commands */
  25 #define SIXP_SEOF       0x40    /* start and end of a 6pack frame */
  26 #define SIXP_TX_URUN    0x48    /* transmit overrun */
  27 #define SIXP_RX_ORUN    0x50    /* receive overrun */
  28 #define SIXP_RX_BUF_OVL 0x58    /* receive buffer overflow */
  29
  30 #define SIXP_CHKSUM     0xFF    /* valid checksum of a 6pack frame */
  31
  32 /* masks to get certain bits out of the status bytes sent by the TNC */
  33
  34 #define SIXP_CMD_MASK           0xC0
  35 #define SIXP_CHN_MASK           0x07
  36 #define SIXP_PRIO_CMD_MASK      0x80
  37 #define SIXP_STD_CMD_MASK       0x40
  38 #define SIXP_PRIO_DATA_MASK     0x38
  39 #define SIXP_TX_MASK            0x20
  40 #define SIXP_RX_MASK            0x10
  41 #define SIXP_RX_DCD_MASK        0x18
  42 #define SIXP_LEDS_ON            0x78
  43 #define SIXP_LEDS_OFF           0x60
  44 #define SIXP_CON                0x08
  45 #define SIXP_STA                0x10
  46
  47 #define SIXP_FOUND_TNC          0xe9
  48 #define SIXP_CON_ON             0x68
  49 #define SIXP_DCD_MASK           0x08
  50 #define SIXP_DAMA_OFF           0
  51
  52 /* default level 2 parameters */
  53 #define SIXP_TXDELAY                    25      /* in 10 ms */
  54 #define SIXP_PERSIST                    50      /* in 256ths */
  55 #define SIXP_SLOTTIME                   10      /* in 10 ms */
  56 #define SIXP_INIT_RESYNC_TIMEOUT        150     /* in 10 ms */
  57 #define SIXP_RESYNC_TIMEOUT             500     /* in 10 ms */
  58
  59 /* 6pack configuration. */
  60 #define SIXP_NRUNIT                     256     /* MAX number of 6pack channels */
  61 #define SIXP_MTU                        256     /* Default MTU */
  62
  63 enum sixpack_flags {
  64         SIXPF_INUSE,    /* Channel in use       */
  65         SIXPF_ERROR,    /* Parity, etc. error   */
  66 };
  67
  68 struct sixpack {
  69   int                   magic;
  70
  71   /* Various fields. */
  72   struct tty_struct     *tty;           /* ptr to TTY structure         */
  73   struct net_device             *dev;           /* easy for intr handling       */
  74
  75   /* These are pointers to the malloc()ed frame buffers. */
  76   unsigned char         *rbuff;         /* receiver buffer              */
  77   int                   rcount;         /* received chars counter       */
  78   unsigned char         *xbuff;         /* transmitter buffer           */
  79   unsigned char         *xhead;         /* pointer to next byte to XMIT */
  80   int                   xleft;          /* bytes left in XMIT queue     */
  81
  82   unsigned char         raw_buf[4];
  83   unsigned char         cooked_buf[400];
  84
  85   unsigned int          rx_count;
  86   unsigned int          rx_count_cooked;
  87
  88   /* 6pack interface statistics. */
  89   unsigned long         rx_packets;     /* inbound frames counter       */
  90   unsigned long         tx_packets;     /* outbound frames counter      */
  91   unsigned long         rx_bytes;       /* inbound bytes counter        */
  92   unsigned long         tx_bytes;       /* outboud bytes counter        */
  93   unsigned long         rx_errors;      /* Parity, etc. errors          */
  94   unsigned long         tx_errors;      /* Planned stuff                */
  95   unsigned long         rx_dropped;     /* No memory for skb            */
  96   unsigned long         tx_dropped;     /* When MTU change              */
  97   unsigned long         rx_over_errors; /* Frame bigger then 6pack buf. */
  98
  99   /* Detailed 6pack statistics. */
 100
 101   int                   mtu;            /* Our mtu (to spot changes!)   */
 102   int                   buffsize;       /* Max buffers sizes            */
 103
 104   unsigned long         flags;          /* Flag values/ mode etc        */
 105                                         /* long req'd for set_bit --RR */
 106   unsigned char         mode;           /* 6pack mode                   */
 107
 108 /* 6pack stuff */
 109
 110   unsigned char tx_delay;
 111   unsigned char persistance;
 112   unsigned char slottime;
 113   unsigned char duplex;
 114   unsigned char led_state;
 115   unsigned char status;
 116   unsigned char status1;
 117   unsigned char status2;
 118   unsigned char tx_enable;
 119   unsigned char tnc_ok;
 120
 121 /*  unsigned char retval; */
 122
 123   struct timer_list tx_t;
 124   struct timer_list resync_t;
 125 }; /* struct sixpack */
 126
 127
 128 /* should later be moved to include/net/ax25.h */
 129 #define AX25_6PACK_HEADER_LEN 0
 130 #define SIXPACK_MAGIC 0x5304
 131
 132 extern int sixpack_init(struct net_device *dev);
 133
 134 #endif
 135
 136 #endif  /* _LINUX_6PACK.H */