scc.h

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/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
#ifndef _SCC_H
#define _SCC_H

#include <uapi/linux/scc.h>


enum {TX_OFF, TX_ON};   /* command for scc_key_trx() */

/* Vector masks in RR2B */

#define VECTOR_MASK 0x06
#define TXINT       0x00
#define EXINT       0x02
#define RXINT       0x04
#define SPINT       0x06

#ifdef CONFIG_SCC_DELAY
#define Inb(port)   inb_p(port)
#define Outb(port, val) outb_p(val, port)
#else
#define Inb(port)   inb(port)
#define Outb(port, val) outb(val, port)
#endif

/* SCC channel control structure for KISS */

struct scc_kiss {
    unsigned char txdelay;      /* Transmit Delay 10 ms/cnt */
    unsigned char persist;      /* Persistence (0-255) as a % */
    unsigned char slottime;     /* Delay to wait on persistence hit */
    unsigned char tailtime;     /* Delay after last byte written */
    unsigned char fulldup;      /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */
    unsigned char waittime;     /* Waittime before any transmit attempt */
    unsigned int  maxkeyup;     /* Maximum time to transmit (seconds) */
    unsigned int  mintime;      /* Minimal offtime after MAXKEYUP timeout (seconds) */
    unsigned int  idletime;     /* Maximum idle time in ALWAYS KEYED mode (seconds) */
    unsigned int  maxdefer;     /* Timer for CSMA channel busy limit */
    unsigned char tx_inhibit;   /* Transmit is not allowed when set */  
    unsigned char group;        /* Group ID for AX.25 TX interlocking */
    unsigned char mode;     /* 'normal' or 'hwctrl' mode (unused) */
    unsigned char softdcd;      /* Use DPLL instead of DCD pin for carrier detect */
};


/* SCC channel structure */

struct scc_channel {
    int init;           /* channel exists? */

    struct net_device *dev;     /* link to device control structure */
    struct net_device_stats dev_stat;/* device statistics */

    char brand;         /* manufacturer of the board */
    long clock;         /* used clock */

    io_port ctrl;           /* I/O address of CONTROL register */
    io_port data;           /* I/O address of DATA register */
    io_port special;        /* I/O address of special function port */
    int irq;            /* Number of Interrupt */

    char option;
    char enhanced;          /* Enhanced SCC support */

    unsigned char wreg[16];     /* Copy of last written value in WRx */
    unsigned char status;       /* Copy of R0 at last external interrupt */
    unsigned char dcd;      /* DCD status */

        struct scc_kiss kiss;       /* control structure for KISS params */
        struct scc_stat stat;       /* statistical information */
        struct scc_modem modem;     /* modem information */

        struct sk_buff_head tx_queue;   /* next tx buffer */
        struct sk_buff *rx_buff;    /* pointer to frame currently received */
        struct sk_buff *tx_buff;    /* pointer to frame currently transmitted */

    /* Timer */
    struct timer_list tx_t;     /* tx timer for this channel */
    struct timer_list tx_wdog;  /* tx watchdogs */
    
    /* Channel lock */
    spinlock_t  lock;       /* Channel guard lock */
};

#endif /* defined(_SCC_H) */