include/linux/scc.h

   1 /* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
   2
   3 #ifndef _SCC_H
   4 #define _SCC_H
   5
   6 #include <linux/config.h>
   7
   8 /* selection of hardware types */
   9
  10 #define PA0HZP          0x00    /* hardware type for PA0HZP SCC card and compatible */
  11 #define EAGLE           0x01    /* hardware type for EAGLE card */
  12 #define PC100           0x02    /* hardware type for PC100 card */
  13 #define PRIMUS          0x04    /* hardware type for PRIMUS-PC (DG9BL) card */
  14 #define DRSI            0x08    /* hardware type for DRSI PC*Packet card */
  15 #define BAYCOM          0x10    /* hardware type for BayCom (U)SCC */
  16
  17 /* DEV ioctl() commands */
  18
  19 enum SCC_ioctl_cmds {
  20         SIOCSCCRESERVED = SIOCDEVPRIVATE,
  21         SIOCSCCCFG,
  22         SIOCSCCINI,
  23         SIOCSCCCHANINI,
  24         SIOCSCCSMEM,
  25         SIOCSCCGKISS,
  26         SIOCSCCSKISS,
  27         SIOCSCCGSTAT,
  28         SIOCSCCCAL
  29 };
  30
  31 /* Device parameter control (from WAMPES) */
  32
  33 enum L1_params {
  34         PARAM_DATA,
  35         PARAM_TXDELAY,
  36         PARAM_PERSIST,
  37         PARAM_SLOTTIME,
  38         PARAM_TXTAIL,
  39         PARAM_FULLDUP,
  40         PARAM_SOFTDCD,          /* was: PARAM_HW */
  41         PARAM_MUTE,             /* ??? */
  42         PARAM_DTR,
  43         PARAM_RTS,
  44         PARAM_SPEED,
  45         PARAM_ENDDELAY,         /* ??? */
  46         PARAM_GROUP,
  47         PARAM_IDLE,
  48         PARAM_MIN,
  49         PARAM_MAXKEY,
  50         PARAM_WAIT,
  51         PARAM_MAXDEFER,
  52         PARAM_TX,
  53         PARAM_HWEVENT = 31,
  54         PARAM_RETURN = 255      /* reset kiss mode */
  55 };
  56
  57 /* fulldup parameter */
  58
  59 enum FULLDUP_modes {
  60         KISS_DUPLEX_HALF,       /* normal CSMA operation */
  61         KISS_DUPLEX_FULL,       /* fullduplex, key down trx after transmission */
  62         KISS_DUPLEX_LINK,       /* fullduplex, key down trx after 'idletime' sec */
  63         KISS_DUPLEX_OPTIMA      /* fullduplex, let the protocol layer control the hw */
  64 };
  65
  66 /* misc. parameters */
  67
  68 #define TIMER_OFF       65535U  /* to switch off timers */
  69 #define NO_SUCH_PARAM   65534U  /* param not implemented */
  70
  71 /* HWEVENT parameter */
  72
  73 enum HWEVENT_opts {
  74         HWEV_DCD_ON,
  75         HWEV_DCD_OFF,
  76         HWEV_ALL_SENT
  77 };
  78
  79 /* channel grouping */
  80
  81 #define RXGROUP         0100    /* if set, only tx when all channels clear */
  82 #define TXGROUP         0200    /* if set, don't transmit simultaneously */
  83
  84 /* Tx/Rx clock sources */
  85
  86 enum CLOCK_sources {
  87         CLK_DPLL,       /* normal halfduplex operation */
  88         CLK_EXTERNAL,   /* external clocking (G3RUH/DF9IC modems) */
  89         CLK_DIVIDER,    /* Rx = DPLL, Tx = divider (fullduplex with */
  90                         /* modems without clock regeneration */
  91         CLK_BRG         /* experimental fullduplex mode with DPLL/BRG for */
  92                         /* MODEMs without clock recovery */
  93 };
  94
  95 /* Tx state */
  96
  97 enum TX_state {
  98         TXS_IDLE,       /* Transmitter off, no data pending */
  99         TXS_BUSY,       /* waiting for permission to send / tailtime */
 100         TXS_ACTIVE,     /* Transmitter on, sending data */
 101         TXS_NEWFRAME,   /* reset CRC and send (next) frame */
 102         TXS_IDLE2,      /* Transmitter on, no data pending */
 103         TXS_WAIT,       /* Waiting for Mintime to expire */
 104         TXS_TIMEOUT     /* We had a transmission timeout */
 105 };
 106
 107 typedef unsigned long io_port;  /* type definition for an 'io port address' */
 108
 109 /* SCC statistical information */
 110
 111 struct scc_stat {
 112         long rxints;            /* Receiver interrupts */
 113         long txints;            /* Transmitter interrupts */
 114         long exints;            /* External/status interrupts */
 115         long spints;            /* Special receiver interrupts */
 116
 117         long txframes;          /* Packets sent */
 118         long rxframes;          /* Number of Frames Actually Received */
 119         long rxerrs;            /* CRC Errors */
 120         long txerrs;            /* KISS errors */
 121
 122         unsigned int nospace;   /* "Out of buffers" */
 123         unsigned int rx_over;   /* Receiver Overruns */
 124         unsigned int tx_under;  /* Transmitter Underruns */
 125
 126         unsigned int tx_state;  /* Transmitter state */
 127         int tx_queued;          /* tx frames enqueued */
 128
 129         unsigned int maxqueue;  /* allocated tx_buffers */
 130         unsigned int bufsize;   /* used buffersize */
 131 };
 132
 133 struct scc_modem {
 134         long speed;             /* Line speed, bps */
 135         char clocksrc;          /* 0 = DPLL, 1 = external, 2 = divider */
 136         char nrz;               /* NRZ instead of NRZI */
 137 };
 138
 139 struct scc_kiss_cmd {
 140         int      command;       /* one of the KISS-Commands defined above */
 141         unsigned param;         /* KISS-Param */
 142 };
 143
 144 struct scc_hw_config {
 145         io_port data_a;         /* data port channel A */
 146         io_port ctrl_a;         /* control port channel A */
 147         io_port data_b;         /* data port channel B */
 148         io_port ctrl_b;         /* control port channel B */
 149         io_port vector_latch;   /* INTACK-Latch (#) */
 150         io_port special;        /* special function port */
 151
 152         int     irq;            /* irq */
 153         long    clock;          /* clock */
 154         char    option;         /* command for function port */
 155
 156         char brand;             /* hardware type */
 157         char escc;              /* use ext. features of a 8580/85180/85280 */
 158 };
 159
 160 /* (#) only one INTACK latch allowed. */
 161
 162
 163 struct scc_mem_config {
 164         unsigned int dummy;
 165         unsigned int bufsize;
 166 };
 167
 168 struct scc_calibrate {
 169         unsigned int time;
 170         unsigned char pattern;
 171 };
 172
 173 #ifdef __KERNEL__
 174
 175 enum {TX_OFF, TX_ON};   /* command for scc_key_trx() */
 176
 177 /* Vector masks in RR2B */
 178
 179 #define VECTOR_MASK     0x06
 180 #define TXINT           0x00
 181 #define EXINT           0x02
 182 #define RXINT           0x04
 183 #define SPINT           0x06
 184
 185 #ifdef CONFIG_SCC_DELAY
 186 #define Inb(port)       inb_p(port)
 187 #define Outb(port, val) outb_p(val, port)
 188 #else
 189 #define Inb(port)       inb(port)
 190 #define Outb(port, val) outb(val, port)
 191 #endif
 192
 193 /* SCC channel control structure for KISS */
 194
 195 struct scc_kiss {
 196         unsigned char txdelay;          /* Transmit Delay 10 ms/cnt */
 197         unsigned char persist;          /* Persistence (0-255) as a % */
 198         unsigned char slottime;         /* Delay to wait on persistence hit */
 199         unsigned char tailtime;         /* Delay after last byte written */
 200         unsigned char fulldup;          /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */
 201         unsigned char waittime;         /* Waittime before any transmit attempt */
 202         unsigned int  maxkeyup;         /* Maximum time to transmit (seconds) */
 203         unsigned int  mintime;          /* Minimal offtime after MAXKEYUP timeout (seconds) */
 204         unsigned int  idletime;         /* Maximum idle time in ALWAYS KEYED mode (seconds) */
 205         unsigned int  maxdefer;         /* Timer for CSMA channel busy limit */
 206         unsigned char tx_inhibit;       /* Transmit is not allowed when set */
 207         unsigned char group;            /* Group ID for AX.25 TX interlocking */
 208         unsigned char mode;             /* 'normal' or 'hwctrl' mode (unused) */
 209         unsigned char softdcd;          /* Use DPLL instead of DCD pin for carrier detect */
 210 };
 211
 212
 213 /* SCC channel structure */
 214
 215 struct scc_channel {
 216         int init;                       /* channel exists? */
 217
 218         struct net_device *dev;         /* link to device control structure */
 219         struct net_device_stats dev_stat;/* device statistics */
 220
 221         char brand;                     /* manufacturer of the board */
 222         long clock;                     /* used clock */
 223
 224         io_port ctrl;                   /* I/O address of CONTROL register */
 225         io_port data;                   /* I/O address of DATA register */
 226         io_port special;                /* I/O address of special function port */
 227         int irq;                        /* Number of Interrupt */
 228
 229         char option;
 230         char enhanced;                  /* Enhanced SCC support */
 231
 232         unsigned char wreg[16];         /* Copy of last written value in WRx */
 233         unsigned char status;           /* Copy of R0 at last external interrupt */
 234         unsigned char dcd;              /* DCD status */
 235
 236         struct scc_kiss kiss;           /* control structure for KISS params */
 237         struct scc_stat stat;           /* statistical information */
 238         struct scc_modem modem;         /* modem information */
 239
 240         struct sk_buff_head tx_queue;   /* next tx buffer */
 241         struct sk_buff *rx_buff;        /* pointer to frame currently received */
 242         struct sk_buff *tx_buff;        /* pointer to frame currently transmitted */
 243
 244         /* Timer */
 245         struct timer_list tx_t;         /* tx timer for this channel */
 246         struct timer_list tx_wdog;      /* tx watchdogs */
 247
 248         /* Channel lock */
 249         spinlock_t      lock;           /* Channel guard lock */
 250 };
 251
 252 #endif /* defined(__KERNEL__) */
 253 #endif /* defined(_SCC_H) */