1 /* Remote serial interface for local (hardwired) serial ports for GO32.
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. */
24 /* This is unused for now. We just return a placeholder. */
41 static int go32_open
PARAMS ((serial_t scb
, const char *name
));
42 static void go32_raw
PARAMS ((serial_t scb
));
43 static int wait_for
PARAMS ((serial_t scb
, int timeout
));
44 static int go32_readchar
PARAMS ((serial_t scb
, int timeout
));
45 static int rate_to_code
PARAMS ((int rate
));
46 static int go32_setbaudrate
PARAMS ((serial_t scb
, int rate
));
47 static int go32_write
PARAMS ((serial_t scb
, const char *str
, int len
));
48 static void go32_restore
PARAMS ((serial_t scb
));
49 static void go32_close
PARAMS ((serial_t scb
));
50 static serial_ttystate go32_get_tty_state
PARAMS ((serial_t scb
));
51 static int go32_set_tty_state
PARAMS ((serial_t scb
, serial_ttystate state
));
52 static int strncasecmp
PARAMS ((char *str1
, char *str2
, int len
));
53 static char *aptr
PARAMS ((short p
));
54 static ASYNC_STRUCT
*getivec
PARAMS ((int which
));
55 static int dos_async_init
PARAMS ((int port
));
56 static void dos_async_tx
PARAMS ((const char c
));
57 static int dos_async_ready
PARAMS (());
58 static int dos_async_rx
PARAMS (());
59 static int dosasync_read
PARAMS ((int fd
, char *buf
, int len
, int timeout
));
60 static int dosasync_write
PARAMS ((int fd
, const char *buf
, int len
));
62 #define SIGNATURE 0x4154
66 #define peek(a,b) (*(unsigned short *)(0xe0000000 + (a)*16 + (b)))
68 static ASYNC_STRUCT
*async
;
80 strncasecmp(str1
, str2
, len
)
86 for (; len
!= 0; --len
)
91 if (toupper(c1
) != toupper(c2
))
92 return toupper(c1
) - toupper(c2
);
104 return (char *)((unsigned)async
- OFFSET
+ p
);
107 static ASYNC_STRUCT
*
112 if (peek(0, which
*4) != OFFSET
)
115 a
= (ASYNC_STRUCT
*)(0xe0000000 + peek(0, which
*4+2)*16 + peek(0, which
*4));
117 if (a
->signature
!= SIGNATURE
)
120 if (a
->version
!= VERSION
)
135 async
= getivec (12);
138 async
= getivec (11);
146 error("GDB can not connect to asynctsr program, check that it is installed\n\
147 and that serial I/O is not being redirected (perhaps by NFS)\n\n\
148 example configuration:\n\
149 C> mode com2:9600,n,8,1,p\n\
156 outportb(com_ier
, 0x0f);
157 outportb(com_bfr
, 0x03);
158 outportb(com_mcr
, 0x0b);
159 async
->getp
= async
->putp
= async
->buffer_start
;
168 while (~inportb(com_lsr
) & 0x20);
176 return (async
->getp
!= async
->putp
);
184 while (!dos_async_ready())
191 rv
= *aptr(async
->getp
++);
192 if (async
->getp
>= async
->buffer_end
)
193 async
->getp
= async
->buffer_start
;
199 dosasync_read (fd
, buf
, len
, timeout
)
209 then
= now
+ timeout
;
215 while (!dos_async_ready())
222 *buf
++ = dos_async_rx();
229 dosasync_write(fd
, buf
, len
)
237 dos_async_tx (*buf
++);
243 go32_open (scb
, name
)
249 if (strncasecmp (name
, "com", 3) != 0)
255 port
= name
[3] - '0';
257 if ((port
!= 1) && (port
!= 2))
263 scb
->fd
= dos_async_init(port
);
274 /* Always in raw mode */
278 go32_readchar (scb
, timeout
)
284 if (dosasync_read(scb
->fd
, &buf
, 1, timeout
))
287 return SERIAL_TIMEOUT
;
290 /* go32_{get set}_tty_state() are both dummys to fill out the function
291 vector. Someday, they may do something real... */
293 static serial_ttystate
294 go32_get_tty_state(scb
)
297 struct go32_ttystate
*state
;
299 state
= (struct go32_ttystate
*)xmalloc(sizeof *state
);
301 return (serial_ttystate
)state
;
305 go32_set_tty_state(scb
, ttystate
)
307 serial_ttystate ttystate
;
309 struct go32_ttystate
*state
;
315 go32_setbaudrate (scb
, rate
)
323 go32_write (scb
, str
, len
)
328 dosasync_write(scb
->fd
, str
, len
);
339 static struct serial_ops go32_ops
=
353 _initialize_ser_go32 ()
355 serial_add_interface (&go32_ops
);