1 /* Serial interface for local (hardwired) serial ports on Un*x like systems
2 Copyright 1992, 1993 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include <sys/types.h>
26 #if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
41 static int hardwire_open
PARAMS ((serial_t scb
, const char *name
));
42 static void hardwire_raw
PARAMS ((serial_t scb
));
43 static int wait_for
PARAMS ((serial_t scb
, int timeout
));
44 static int hardwire_readchar
PARAMS ((serial_t scb
, int timeout
));
45 static int rate_to_code
PARAMS ((int rate
));
46 static int hardwire_setbaudrate
PARAMS ((serial_t scb
, int rate
));
47 static int hardwire_write
PARAMS ((serial_t scb
, const char *str
, int len
));
48 static void hardwire_restore
PARAMS ((serial_t scb
));
49 static void hardwire_close
PARAMS ((serial_t scb
));
51 /* Open up a real live device for serial I/O */
54 hardwire_open(scb
, name
)
58 scb
->fd
= open (name
, O_RDWR
);
70 struct termios termios
;
72 if (tcgetattr(scb
->fd
, &termios
))
74 fprintf(stderr
, "tcgetattr failed: %s\n", safe_strerror(errno
));
80 termios
.c_cflag
&= ~(CSIZE
|PARENB
);
81 termios
.c_cflag
|= CS8
;
82 termios
.c_cc
[VMIN
] = 0;
83 termios
.c_cc
[VTIME
] = 0;
85 if (tcsetattr(scb
->fd
, TCSANOW
, &termios
))
87 fprintf(stderr
, "tcsetattr failed: %s\n", safe_strerror(errno
));
94 if (ioctl (scb
->fd
, TCGETA
, &termio
))
96 fprintf(stderr
, "TCGETA failed: %s\n", safe_strerror(errno
));
102 termio
.c_cflag
&= ~(CSIZE
|PARENB
);
103 termio
.c_cflag
|= CS8
;
104 termio
.c_cc
[VMIN
] = 0;
105 termio
.c_cc
[VTIME
] = 0;
107 if (ioctl (scb
->fd
, TCSETA
, &termio
))
109 fprintf(stderr
, "TCSETA failed: %s\n", safe_strerror(errno
));
114 struct sgttyb sgttyb
;
116 if (ioctl (scb
->fd
, TIOCGETP
, &sgttyb
))
117 fprintf(stderr
, "TIOCGETP failed: %s\n", safe_strerror(errno
));
119 sgttyb
.sg_flags
|= RAW
| ANYP
;
120 sgttyb
.sg_flags
&= ~(CBREAK
| ECHO
);
122 if (ioctl (scb
->fd
, TIOCSETP
, &sgttyb
))
123 fprintf(stderr
, "TIOCSETP failed: %s\n", safe_strerror(errno
));
126 scb
->current_timeout
= 0;
129 /* Wait for input on scb, with timeout seconds. Returns 0 on success,
130 otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
132 For termio{s}, we actually just setup VTIME if necessary, and let the
133 timeout occur in the read() in hardwire_read().
137 wait_for(scb
, timeout
)
152 FD_SET(scb
->fd
, &readfds
);
155 numfds
= select(scb
->fd
+1, &readfds
, 0, 0, &tv
);
157 numfds
= select(scb
->fd
+1, &readfds
, 0, 0, 0);
161 return SERIAL_TIMEOUT
;
163 return SERIAL_ERROR
; /* Got an error from select or poll */
167 #endif /* HAVE_SGTTY */
169 #if defined HAVE_TERMIO || defined HAVE_TERMIOS
170 if (timeout
== scb
->current_timeout
)
175 struct termios termios
;
177 if (tcgetattr(scb
->fd
, &termios
))
178 fprintf(stderr
, "wait_for() tcgetattr failed: %s\n", safe_strerror(errno
));
180 termios
.c_cc
[VTIME
] = timeout
* 10;
182 if (tcsetattr(scb
->fd
, TCSANOW
, &termios
))
183 fprintf(stderr
, "wait_for() tcsetattr failed: %s\n", safe_strerror(errno
));
184 #endif /* HAVE_TERMIOS */
187 struct termio termio
;
189 if (ioctl (scb
->fd
, TCGETA
, &termio
))
190 fprintf(stderr
, "wait_for() TCGETA failed: %s\n", safe_strerror(errno
));
192 termio
.c_cc
[VTIME
] = timeout
* 10;
194 if (ioctl (scb
->fd
, TCSETA
, &termio
))
195 fprintf(stderr
, "TCSETA failed: %s\n", safe_strerror(errno
));
196 #endif /* HAVE_TERMIO */
198 scb
->current_timeout
= timeout
;
201 #endif /* HAVE_TERMIO || HAVE_TERMIOS */
204 /* Read a character with user-specified timeout. TIMEOUT is number of seconds
205 to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
206 char if successful. Returns -2 if timeout expired, EOF if line dropped
207 dead, or -3 for any other error (see errno in that case). */
210 hardwire_readchar(scb
, timeout
)
216 if (scb
->bufcnt
-- > 0)
219 status
= wait_for(scb
, timeout
);
224 scb
->bufcnt
= read(scb
->fd
, scb
->buf
, BUFSIZ
);
226 if (scb
->bufcnt
<= 0)
227 if (scb
->bufcnt
== 0)
228 return SERIAL_TIMEOUT
; /* 0 chars means timeout [may need to
229 distinguish between EOF & timeouts
232 return SERIAL_ERROR
; /* Got an error from read */
235 scb
->bufp
= scb
->buf
;
247 /* Translate baud rates from integers to damn B_codes. Unix should
248 have outgrown this crap years ago, but even POSIX wouldn't buck it. */
281 for (i
= 0; baudtab
[i
].rate
!= -1; i
++)
282 if (rate
== baudtab
[i
].rate
)
283 return baudtab
[i
].code
;
289 hardwire_setbaudrate(scb
, rate
)
294 struct termios termios
;
296 if (tcgetattr (scb
->fd
, &termios
))
299 cfsetospeed (&termios
, rate_to_code (rate
));
300 cfsetispeed (&termios
, rate_to_code (rate
));
302 if (tcsetattr (scb
->fd
, TCSANOW
, &termios
))
307 struct termio termio
;
309 if (ioctl (scb
->fd
, TCGETA
, &termio
))
316 termio
.c_cflag
&= ~(CBAUD
| CIBAUD
);
317 termio
.c_cflag
|= rate_to_code (rate
);
319 if (ioctl (scb
->fd
, TCSETA
, &termio
))
324 struct sgttyb sgttyb
;
326 if (ioctl (scb
->fd
, TIOCGETP
, &sgttyb
))
329 sgttyb
.sg_ispeed
= rate_to_code (rate
);
330 sgttyb
.sg_ospeed
= rate_to_code (rate
);
332 if (ioctl (scb
->fd
, TIOCSETP
, &sgttyb
))
339 hardwire_write(scb
, str
, len
)
348 cc
= write(scb
->fd
, str
, len
);
359 hardwire_restore(scb
)
375 static struct serial_ops hardwire_ops
=
389 _initialize_ser_hardwire ()
391 serial_add_interface (&hardwire_ops
);
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