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/* $Id: scc.h,v 1.1 2004-01-28 15:26:31 giacomo Exp $ */
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#ifndef _SCC_H
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#define _SCC_H
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#include <linux/config.h>
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/* selection of hardware types */
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#define PA0HZP          0x00    /* hardware type for PA0HZP SCC card and compatible */
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#define EAGLE           0x01    /* hardware type for EAGLE card */
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#define PC100           0x02    /* hardware type for PC100 card */
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#define PRIMUS          0x04    /* hardware type for PRIMUS-PC (DG9BL) card */
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#define DRSI            0x08    /* hardware type for DRSI PC*Packet card */
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#define BAYCOM          0x10    /* hardware type for BayCom (U)SCC */
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/* DEV ioctl() commands */
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enum SCC_ioctl_cmds {
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        SIOCSCCRESERVED = SIOCDEVPRIVATE,
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        SIOCSCCCFG,
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        SIOCSCCINI,
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        SIOCSCCCHANINI,
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        SIOCSCCSMEM,
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        SIOCSCCGKISS,
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        SIOCSCCSKISS,
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        SIOCSCCGSTAT,
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        SIOCSCCCAL
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};
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/* Device parameter control (from WAMPES) */
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enum L1_params {
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        PARAM_DATA,
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        PARAM_TXDELAY,
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        PARAM_PERSIST,
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        PARAM_SLOTTIME,
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        PARAM_TXTAIL,
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        PARAM_FULLDUP,
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        PARAM_SOFTDCD,          /* was: PARAM_HW */
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        PARAM_MUTE,             /* ??? */
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        PARAM_DTR,
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        PARAM_RTS,
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        PARAM_SPEED,
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        PARAM_ENDDELAY,         /* ??? */
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        PARAM_GROUP,
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        PARAM_IDLE,
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        PARAM_MIN,
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        PARAM_MAXKEY,
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        PARAM_WAIT,
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        PARAM_MAXDEFER,
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        PARAM_TX,
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        PARAM_HWEVENT = 31,
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        PARAM_RETURN = 255      /* reset kiss mode */
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};
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/* fulldup parameter */
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enum FULLDUP_modes {
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        KISS_DUPLEX_HALF,       /* normal CSMA operation */
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        KISS_DUPLEX_FULL,       /* fullduplex, key down trx after transmission */
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        KISS_DUPLEX_LINK,       /* fullduplex, key down trx after 'idletime' sec */
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        KISS_DUPLEX_OPTIMA      /* fullduplex, let the protocol layer control the hw */
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};
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/* misc. parameters */
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#define TIMER_OFF       65535U  /* to switch off timers */
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#define NO_SUCH_PARAM   65534U  /* param not implemented */
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/* HWEVENT parameter */
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enum HWEVENT_opts {
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        HWEV_DCD_ON,
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        HWEV_DCD_OFF,
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        HWEV_ALL_SENT
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};
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/* channel grouping */
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#define RXGROUP         0100    /* if set, only tx when all channels clear */
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#define TXGROUP         0200    /* if set, don't transmit simultaneously */
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/* Tx/Rx clock sources */
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enum CLOCK_sources {
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        CLK_DPLL,       /* normal halfduplex operation */
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        CLK_EXTERNAL,   /* external clocking (G3RUH/DF9IC modems) */
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        CLK_DIVIDER,    /* Rx = DPLL, Tx = divider (fullduplex with */
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                        /* modems without clock regeneration */
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        CLK_BRG         /* experimental fullduplex mode with DPLL/BRG for */
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                        /* MODEMs without clock recovery */
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};
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/* Tx state */
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enum TX_state {
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        TXS_IDLE,       /* Transmitter off, no data pending */
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        TXS_BUSY,       /* waiting for permission to send / tailtime */
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        TXS_ACTIVE,     /* Transmitter on, sending data */
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        TXS_NEWFRAME,   /* reset CRC and send (next) frame */
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        TXS_IDLE2,      /* Transmitter on, no data pending */
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        TXS_WAIT,       /* Waiting for Mintime to expire */
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        TXS_TIMEOUT     /* We had a transmission timeout */
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};
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typedef unsigned long io_port;  /* type definition for an 'io port address' */
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/* SCC statistical information */
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struct scc_stat {
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        long rxints;            /* Receiver interrupts */
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        long txints;            /* Transmitter interrupts */
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        long exints;            /* External/status interrupts */
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        long spints;            /* Special receiver interrupts */
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        long txframes;          /* Packets sent */
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        long rxframes;          /* Number of Frames Actually Received */
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        long rxerrs;            /* CRC Errors */
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        long txerrs;            /* KISS errors */
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        unsigned int nospace;   /* "Out of buffers" */
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        unsigned int rx_over;   /* Receiver Overruns */
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        unsigned int tx_under;  /* Transmitter Underruns */
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        unsigned int tx_state;  /* Transmitter state */
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        int tx_queued;          /* tx frames enqueued */
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        unsigned int maxqueue;  /* allocated tx_buffers */
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        unsigned int bufsize;   /* used buffersize */
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};
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struct scc_modem {
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        long speed;             /* Line speed, bps */
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        char clocksrc;          /* 0 = DPLL, 1 = external, 2 = divider */
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        char nrz;               /* NRZ instead of NRZI */      
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};
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struct scc_kiss_cmd {
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        int      command;       /* one of the KISS-Commands defined above */
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        unsigned param;         /* KISS-Param */
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};
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struct scc_hw_config {
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        io_port data_a;         /* data port channel A */
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        io_port ctrl_a;         /* control port channel A */
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        io_port data_b;         /* data port channel B */
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        io_port ctrl_b;         /* control port channel B */
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        io_port vector_latch;   /* INTACK-Latch (#) */
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        io_port special;        /* special function port */
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        int     irq;            /* irq */
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        long    clock;          /* clock */
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        char    option;         /* command for function port */
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        char brand;             /* hardware type */
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        char escc;              /* use ext. features of a 8580/85180/85280 */
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};
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/* (#) only one INTACK latch allowed. */
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struct scc_mem_config {
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        unsigned int dummy;
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        unsigned int bufsize;
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};
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struct scc_calibrate {
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        unsigned int time;
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        unsigned char pattern;
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};
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#ifdef __KERNEL__
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enum {TX_OFF, TX_ON};   /* command for scc_key_trx() */
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/* Vector masks in RR2B */
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#define VECTOR_MASK     0x06
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#define TXINT           0x00
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#define EXINT           0x02
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#define RXINT           0x04
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#define SPINT           0x06
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#ifdef CONFIG_SCC_DELAY
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#define Inb(port)       inb_p(port)
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#define Outb(port, val) outb_p(val, port)
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#else
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#define Inb(port)       inb(port)
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#define Outb(port, val) outb(val, port)
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#endif
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/* SCC channel control structure for KISS */
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struct scc_kiss {
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        unsigned char txdelay;          /* Transmit Delay 10 ms/cnt */
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        unsigned char persist;          /* Persistence (0-255) as a % */
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        unsigned char slottime;         /* Delay to wait on persistence hit */
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        unsigned char tailtime;         /* Delay after last byte written */
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        unsigned char fulldup;          /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */
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        unsigned char waittime;         /* Waittime before any transmit attempt */
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        unsigned int  maxkeyup;         /* Maximum time to transmit (seconds) */
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        unsigned char mintime;          /* Minimal offtime after MAXKEYUP timeout (seconds) */
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        unsigned int  idletime;         /* Maximum idle time in ALWAYS KEYED mode (seconds) */
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        unsigned int  maxdefer;         /* Timer for CSMA channel busy limit */
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        unsigned char tx_inhibit;       /* Transmit is not allowed when set */ 
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        unsigned char group;            /* Group ID for AX.25 TX interlocking */
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        unsigned char mode;             /* 'normal' or 'hwctrl' mode (unused) */
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        unsigned char softdcd;          /* Use DPLL instead of DCD pin for carrier detect */
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};
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/* SCC channel structure */
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struct scc_channel {
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        int init;                       /* channel exists? */
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        struct net_device *dev;         /* link to device control structure */
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        struct net_device_stats dev_stat;/* device statistics */
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        char brand;                     /* manufacturer of the board */
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        long clock;                     /* used clock */
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        io_port ctrl;                   /* I/O address of CONTROL register */
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        io_port data;                   /* I/O address of DATA register */
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        io_port special;                /* I/O address of special function port */
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        int irq;                        /* Number of Interrupt */
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        char option;
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        char enhanced;                  /* Enhanced SCC support */
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        unsigned char wreg[16];         /* Copy of last written value in WRx */
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        unsigned char status;           /* Copy of R0 at last external interrupt */
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        unsigned char dcd;              /* DCD status */
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        struct scc_kiss kiss;           /* control structure for KISS params */
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        struct scc_stat stat;           /* statistical information */
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        struct scc_modem modem;         /* modem information */
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        struct sk_buff_head tx_queue;   /* next tx buffer */
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        struct sk_buff *rx_buff;        /* pointer to frame currently received */
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        struct sk_buff *tx_buff;        /* pointer to frame currently transmitted */
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        /* Timer */
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        struct timer_list tx_t;         /* tx timer for this channel */
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        struct timer_list tx_wdog;      /* tx watchdogs */
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        /* Channel lock */
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        spinlock_t      lock;           /* Channel guard lock */
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};
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#endif /* defined(__KERNEL__) */
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#endif /* defined(_SCC_H) */