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Annotation of Gnu-Mach/device/tty.h, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1993-1990 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /*
        !            27:  *     Author: David B. Golub, Carnegie Mellon University
        !            28:  *     Date:   7/90
        !            29:  *
        !            30:  *     Compatibility TTY structure for existing TTY device drivers.
        !            31:  */
        !            32: 
        !            33: #ifndef        _DEVICE_TTY_H_
        !            34: #define        _DEVICE_TTY_H_
        !            35: 
        !            36: #include <kern/lock.h>
        !            37: #include <kern/queue.h>
        !            38: #include <mach/port.h>
        !            39: 
        !            40: #include <device/device_types.h>
        !            41: #include <device/tty_status.h>
        !            42: #include <device/cirbuf.h>
        !            43: #include <device/io_req.h>
        !            44: 
        !            45: #ifdef luna88k
        !            46: #include <luna88k/jtermio.h>
        !            47: #endif
        !            48: 
        !            49: struct tty {
        !            50:        decl_simple_lock_data(,t_lock)
        !            51:        struct cirbuf   t_inq;          /* input buffer */
        !            52:        struct cirbuf   t_outq;         /* output buffer */
        !            53:        char *          t_addr;         /* device pointer */
        !            54:        int             t_dev;          /* device number */
        !            55:        int             (*t_start)(struct tty *);
        !            56:                                        /* routine to start output */
        !            57: #define        t_oproc t_start
        !            58:        int             (*t_stop)(struct tty *, int);
        !            59:                                        /* routine to stop output */
        !            60:        int             (*t_mctl)(struct tty *, int, int);
        !            61:                                        /* (optional) routine to control
        !            62:                                           modem signals */
        !            63:        char            t_ispeed;       /* input speed */
        !            64:        char            t_ospeed;       /* output speed */
        !            65:        char            t_breakc;       /* character to deliver when 'break'
        !            66:                                           condition received */
        !            67:        int             t_flags;        /* mode flags */
        !            68:        int             t_state;        /* current state */
        !            69:        int             t_line;         /* fake line discipline number,
        !            70:                                           for old drivers - always 0 */
        !            71:        queue_head_t    t_delayed_read; /* pending read requests */
        !            72:        queue_head_t    t_delayed_write;/* pending write requests */
        !            73:        queue_head_t    t_delayed_open; /* pending open requests */
        !            74: 
        !            75: /*
        !            76:  * Items beyond this point should be removed to device-specific
        !            77:  * extension structures.
        !            78:  */
        !            79:        int             (*t_getstat)(); /* routine to get status */
        !            80:        int             (*t_setstat)(); /* routine to set status */
        !            81:        dev_ops_t       t_tops;         /* another device to possibly
        !            82:                                           push through */
        !            83: };
        !            84: typedef struct tty     *tty_t;
        !            85: 
        !            86: /*
        !            87:  * Common TTY service routines
        !            88:  */
        !            89: extern io_return_t char_open(
        !            90:        int             dev,
        !            91:        struct tty *    tp,
        !            92:        dev_mode_t      mode,
        !            93:        io_req_t        ior);
        !            94: 
        !            95: extern io_return_t char_read(
        !            96:        struct tty *    tp,
        !            97:        io_req_t        ior);
        !            98: 
        !            99: extern io_return_t char_write(
        !           100:        struct tty *    tp,
        !           101:        io_req_t        ior);
        !           102: 
        !           103: extern void ttyinput(
        !           104:        unsigned int    c,
        !           105:        struct tty *    tp);
        !           106: 
        !           107: extern boolean_t ttymodem(
        !           108:        struct tty *    tp,
        !           109:        boolean_t       carrier_up);
        !           110: 
        !           111: extern void tty_queue_completion(
        !           112:        queue_t         queue);
        !           113: #define        tt_open_wakeup(tp) \
        !           114:        (tty_queue_completion(&(tp)->t_delayed_open))
        !           115: #define        tt_write_wakeup(tp) \
        !           116:        (tty_queue_completion(&(tp)->t_delayed_write))
        !           117: 
        !           118: extern void ttychars(
        !           119:        struct tty *    tp);
        !           120: 
        !           121: #define        TTMINBUF        90
        !           122: 
        !           123: short  tthiwat[NSPEEDS], ttlowat[NSPEEDS];
        !           124: #define        TTHIWAT(tp)     tthiwat[(tp)->t_ospeed]
        !           125: #define        TTLOWAT(tp)     ttlowat[(tp)->t_ospeed]
        !           126: 
        !           127: /* internal state bits */
        !           128: #define        TS_INIT         0x00000001      /* tty structure initialized */
        !           129: #define        TS_TIMEOUT      0x00000002      /* delay timeout in progress */
        !           130: #define        TS_WOPEN        0x00000004      /* waiting for open to complete */
        !           131: #define        TS_ISOPEN       0x00000008      /* device is open */
        !           132: #define        TS_FLUSH        0x00000010      /* outq has been flushed during DMA */
        !           133: #define        TS_CARR_ON      0x00000020      /* software copy of carrier-present */
        !           134: #define        TS_BUSY         0x00000040      /* output in progress */
        !           135: #define        TS_ASLEEP       0x00000080      /* wakeup when output done */
        !           136: 
        !           137: #define        TS_TTSTOP       0x00000100      /* output stopped by ctl-s */
        !           138: #define        TS_HUPCLS       0x00000200      /* hang up upon last close */
        !           139: #define        TS_TBLOCK       0x00000400      /* tandem queue blocked */
        !           140: 
        !           141: #define        TS_NBIO         0x00001000      /* tty in non-blocking mode */
        !           142: #define        TS_ONDELAY      0x00002000      /* device is open; software copy of 
        !           143:                                         * carrier is not present */
        !           144: #define        TS_MIN          0x00004000      /* buffer input chars, if possible */
        !           145: #define        TS_MIN_TO       0x00008000      /* timeout for the above is active */
        !           146: 
        !           147: #define TS_OUT          0x00010000     /* tty in use for dialout only */
        !           148: #define        TS_RTS_DOWN     0x00020000      /* modem pls stop */
        !           149: 
        !           150: #define TS_TRANSLATE   0x00100000      /* translation device enabled */
        !           151: #define TS_KDB         0x00200000      /* should enter kdb on ALT */
        !           152: 
        !           153: #define        TS_MIN_TO_RCV   0x00400000      /* character recived during 
        !           154:                                           receive timeout interval */
        !           155: 
        !           156: /* flags - old names defined in terms of new ones */
        !           157: 
        !           158: #define        TANDEM          TF_TANDEM
        !           159: #define        ODDP            TF_ODDP
        !           160: #define        EVENP           TF_EVENP
        !           161: #define        ANYP            (ODDP|EVENP)
        !           162: #define        MDMBUF          TF_MDMBUF
        !           163: #define        LITOUT          TF_LITOUT
        !           164: #define        NOHANG          TF_NOHANG
        !           165: 
        !           166: #define        ECHO            TF_ECHO
        !           167: #define        CRMOD           TF_CRMOD
        !           168: #define        XTABS           TF_XTABS
        !           169: 
        !           170: /* these are here only to let old code compile - they are never set */
        !           171: #define        RAW             LITOUT
        !           172: #define        PASS8           LITOUT
        !           173: 
        !           174: /*
        !           175:  * Hardware bits.
        !           176:  * SHOULD NOT BE HERE.
        !           177:  */
        !           178: #define        DONE    0200
        !           179: #define        IENABLE 0100
        !           180: 
        !           181: /*
        !           182:  * Modem control commands.
        !           183:  */
        !           184: #define        DMSET           0
        !           185: #define        DMBIS           1
        !           186: #define        DMBIC           2
        !           187: #define        DMGET           3
        !           188: 
        !           189: /*
        !           190:  * Fake 'line discipline' switch, for the benefit of old code
        !           191:  * that wants to call through it.
        !           192:  */
        !           193: struct ldisc_switch {
        !           194:        int     (*l_read) (struct tty *, io_req_t);     /* read */
        !           195:        int     (*l_write)(struct tty *, io_req_t);     /* write */
        !           196:        void    (*l_rint) (unsigned int, struct tty *); /* character input */
        !           197:        boolean_t (*l_modem)(struct tty *, boolean_t);  /* modem change */
        !           198:        void    (*l_start)(struct tty *);               /* start output */
        !           199: };
        !           200: 
        !           201: extern struct ldisc_switch     linesw[];
        !           202: 
        !           203: #endif /* _DEVICE_TTY_H_ */

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