tty.h

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    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  Software.Distribution@CS.CMU.EDU
   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  * HISTORY
   28  * $Log:        tty.h,v $
   29  * Revision 2.11  93/11/17  16:35:02  dbg
   30  *      Changed t_ispeed, t_ospeed to unsigned char to avoid lint.
   31  *      [93/10/13            dbg]
   32  * 
   33  * Revision 2.10  93/05/30  21:07:59  rvb
   34  *      Added t_mctl for modem control operations and TS_RTS_DOWN.
   35  *      [93/05/29  10:07:25  af]
   36  * 
   37  * Revision 2.9  93/02/01  09:46:32  danner
   38  *      Added TS_MIN_TO_RCV definition.
   39  *      [93/01/27            danner]
   40  * 
   41  * Revision 2.8  93/01/14  17:27:21  danner
   42  *      Removed Omron kanji support.... will replace with MI
   43  *      support at a later date.
   44  *      [92/12/10            jfriedl]
   45  *      Added function prototypes.
   46  *      [92/11/17            dbg]
   47  * 
   48  * Revision 2.7  92/05/05  10:46:22  danner
   49  *      Made TTYHOG dynamically adjustable.
   50  *      New flags for delayed char receive.
   51  *      [92/05/04  11:30:59  af]
   52  * 
   53  * Revision 2.6  91/07/09  23:16:12  danner
   54  *      Added omron tty specific flags; conditionalized under luna88k.
   55  *      [91/05/25            danner]
   56  * 
   57  * Revision 2.5  91/05/14  16:02:00  mrt
   58  *      Correcting copyright
   59  * 
   60  * Revision 2.4  91/02/05  17:10:26  mrt
   61  *      Changed to new Mach copyright
   62  *      [91/01/31  17:30:52  mrt]
   63  * 
   64  * Revision 2.3  90/08/27  21:55:44  dbg
   65  *      Re-created to avoid ownership problems.
   66  *      [90/07/09            dbg]
   67  * 
   68  */
   69 /*
   70  *      Author: David B. Golub, Carnegie Mellon University
   71  *      Date:   7/90
   72  *
   73  *      Compatibility TTY structure for existing TTY device drivers.
   74  */
   75 
   76 #ifndef _DEVICE_TTY_H_
   77 #define _DEVICE_TTY_H_
   78 
   79 #include <kern/lock.h>
   80 #include <kern/queue.h>
   81 #include <mach/port.h>
   82 
   83 #include <device/device_types.h>
   84 #include <device/tty_status.h>
   85 #include <device/cirbuf.h>
   86 #include <device/io_req.h>
   87 
   88 #ifdef  luna88k
   89 #include <luna88k/jtermio.h>
   90 #endif
   91 
   92 struct tty {
   93         decl_simple_lock_data(,t_lock)
   94         struct cirbuf   t_inq;          /* input buffer */
   95         struct cirbuf   t_outq;         /* output buffer */
   96         char *          t_addr;         /* device pointer */
   97         int             t_dev;          /* device number */
   98         void            (*t_start)(struct tty *);
   99                                         /* routine to start output */
  100 #define t_oproc t_start
  101         void            (*t_stop)(struct tty *, int);
  102                                         /* routine to stop output */
  103         int             (*t_mctl)(struct tty *, int, int);
  104                                         /* (optional) routine to control
  105                                            modem signals */
  106         unsigned char   t_ispeed;       /* input speed */
  107         unsigned char   t_ospeed;       /* output speed */
  108         char            t_breakc;       /* character to deliver when 'break'
  109                                            condition received */
  110         int             t_flags;        /* mode flags */
  111         int             t_state;        /* current state */
  112         int             t_line;         /* fake line discipline number,
  113                                            for old drivers - always 0 */
  114         queue_head_t    t_delayed_read; /* pending read requests */
  115         queue_head_t    t_delayed_write;/* pending write requests */
  116         queue_head_t    t_delayed_open; /* pending open requests */
  117 
  118 /*
  119  * Items beyond this point should be removed to device-specific
  120  * extension structures.
  121  */
  122         int             (*t_getstat)(); /* routine to get status */
  123         int             (*t_setstat)(); /* routine to set status */
  124         dev_ops_t       t_tops;         /* another device to possibly
  125                                            push through */
  126 };
  127 typedef struct tty      *tty_t;
  128 
  129 /*
  130  * Common TTY service routines
  131  */
  132 extern io_return_t char_open(
  133         int             dev,
  134         struct tty *    tp,
  135         dev_mode_t      mode,
  136         io_req_t        ior);
  137 
  138 extern io_return_t char_read(
  139         struct tty *    tp,
  140         io_req_t        ior);
  141 
  142 extern io_return_t char_write(
  143         struct tty *    tp,
  144         io_req_t        ior);
  145 
  146 extern void ttyclose(
  147         struct tty *    tp);
  148 
  149 extern io_return_t tty_get_status(
  150         register struct tty *tp,
  151         dev_flavor_t    flavor,
  152         int *           data,           /* pointer to OUT array */
  153         natural_t       *count);                /* out */
  154 
  155 extern  io_return_t tty_set_status(
  156         register struct tty *tp,
  157         dev_flavor_t    flavor,
  158         int *           data,
  159         natural_t       count);
  160 
  161 extern void ttyinput(
  162         unsigned int    c,
  163         struct tty *    tp);
  164 
  165 extern boolean_t ttymodem(
  166         struct tty *    tp,
  167         boolean_t       carrier_up);
  168 
  169 extern void tty_queue_completion(
  170         queue_t         queue);
  171 #define tt_open_wakeup(tp) \
  172         (tty_queue_completion(&(tp)->t_delayed_open))
  173 #define tt_write_wakeup(tp) \
  174         (tty_queue_completion(&(tp)->t_delayed_write))
  175 
  176 extern void ttychars(
  177         struct tty *    tp);
  178 
  179 extern void tty_cts(
  180         struct tty *    tp,
  181         boolean_t       cts_up);
  182 
  183 #define TTMINBUF        90
  184 
  185 short   tthiwat[NSPEEDS], ttlowat[NSPEEDS];
  186 #define TTHIWAT(tp)     tthiwat[(tp)->t_ospeed]
  187 #define TTLOWAT(tp)     ttlowat[(tp)->t_ospeed]
  188 
  189 /* internal state bits */
  190 #define TS_INIT         0x00000001      /* tty structure initialized */
  191 #define TS_TIMEOUT      0x00000002      /* delay timeout in progress */
  192 #define TS_WOPEN        0x00000004      /* waiting for open to complete */
  193 #define TS_ISOPEN       0x00000008      /* device is open */
  194 #define TS_FLUSH        0x00000010      /* outq has been flushed during DMA */
  195 #define TS_CARR_ON      0x00000020      /* software copy of carrier-present */
  196 #define TS_BUSY         0x00000040      /* output in progress */
  197 #define TS_ASLEEP       0x00000080      /* wakeup when output done */
  198 
  199 #define TS_TTSTOP       0x00000100      /* output stopped by ctl-s */
  200 #define TS_HUPCLS       0x00000200      /* hang up upon last close */
  201 #define TS_TBLOCK       0x00000400      /* tandem queue blocked */
  202 
  203 #define TS_NBIO         0x00001000      /* tty in non-blocking mode */
  204 #define TS_ONDELAY      0x00002000      /* device is open; software copy of 
  205                                          * carrier is not present */
  206 #define TS_MIN          0x00004000      /* buffer input chars, if possible */
  207 #define TS_MIN_TO       0x00008000      /* timeout for the above is active */
  208 
  209 #define TS_OUT          0x00010000      /* tty in use for dialout only */
  210 #define TS_RTS_DOWN     0x00020000      /* modem pls stop */
  211 
  212 #define TS_TRANSLATE    0x00100000      /* translation device enabled */
  213 #define TS_KDB          0x00200000      /* should enter kdb on ALT */
  214 
  215 #define TS_MIN_TO_RCV   0x00400000      /* character recived during 
  216                                            receive timeout interval */
  217 
  218 /* flags - old names defined in terms of new ones */
  219 
  220 #define TANDEM          TF_TANDEM
  221 #define ODDP            TF_ODDP
  222 #define EVENP           TF_EVENP
  223 #define ANYP            (ODDP|EVENP)
  224 #define MDMBUF          TF_MDMBUF
  225 #define LITOUT          TF_LITOUT
  226 #define NOHANG          TF_NOHANG
  227 
  228 #define ECHO            TF_ECHO
  229 #define CRMOD           TF_CRMOD
  230 #define XTABS           TF_XTABS
  231 
  232 /* these are here only to let old code compile - they are never set */
  233 #define RAW             LITOUT
  234 #define PASS8           LITOUT
  235 
  236 /*
  237  * Hardware bits.
  238  * SHOULD NOT BE HERE.
  239  */
  240 #define DONE    0200
  241 #define IENABLE 0100
  242 
  243 /*
  244  * Modem control commands.
  245  */
  246 #define DMSET           0
  247 #define DMBIS           1
  248 #define DMBIC           2
  249 #define DMGET           3
  250 
  251 /*
  252  * Fake 'line discipline' switch, for the benefit of old code
  253  * that wants to call through it.
  254  */
  255 struct ldisc_switch {
  256         int     (*l_read) (struct tty *, io_req_t);     /* read */
  257         int     (*l_write)(struct tty *, io_req_t);     /* write */
  258         void    (*l_rint) (unsigned int, struct tty *); /* character input */
  259         boolean_t (*l_modem)(struct tty *, boolean_t);  /* modem change */
  260         void    (*l_start)(struct tty *);               /* start output */
  261 };
  262 
  263 extern struct ldisc_switch      linesw[];
  264 
  265 #endif  /* _DEVICE_TTY_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/device/tty.h

FreeBSD/Linux Kernel Cross Reference
sys/device/tty.h