Commit | Line | Data |
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b52373a2 JG |
1 | /* Remote serial interface for OS's with termios, for GDB. |
2 | Copyright 1992 Free Software Foundation, Inc. | |
ae0ea72e SC |
3 | |
4 | This file is part of GDB. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "serial.h" | |
22 | #include <fcntl.h> | |
23 | #include <termios.h> | |
24 | #include <sys/time.h> | |
25 | ||
b52373a2 | 26 | /* File descriptor used in termios routines to access serial line. */ |
ae0ea72e SC |
27 | static int desc; |
28 | ||
b52373a2 JG |
29 | /* Saved state about the terminal. */ |
30 | static struct termios otermios; | |
31 | static int oflags; | |
ae0ea72e | 32 | |
b52373a2 JG |
33 | const char * |
34 | serial_default_name () | |
ae0ea72e SC |
35 | { |
36 | return "/dev/ttya"; | |
37 | } | |
38 | ||
39 | void | |
b52373a2 | 40 | serial_raw () |
ae0ea72e SC |
41 | { |
42 | /* Now happens inside of serial_open */ | |
43 | } | |
44 | ||
ae0ea72e | 45 | void |
b52373a2 | 46 | serial_normal () |
ae0ea72e SC |
47 | { |
48 | fcntl(desc, oflags, 0); | |
49 | ||
50 | if (tcsetattr(desc, TCSANOW, &otermios)) | |
51 | { | |
52 | printf("tcgetattr failed: errno=%d\n", errno); | |
53 | } | |
54 | } | |
55 | ||
56 | int | |
b52373a2 JG |
57 | serial_open (name) |
58 | const char *name; | |
ae0ea72e SC |
59 | { |
60 | struct termios termios; | |
61 | ||
62 | desc = open (name, O_RDWR); | |
63 | if (desc < 0) | |
64 | perror("Open failed: "); | |
65 | ||
66 | oflags = fcntl(desc, F_GETFL, 0); | |
67 | ||
68 | fcntl(desc, F_SETFL, oflags|FNDELAY); | |
69 | ||
70 | if (tcgetattr(desc, &termios)) { | |
71 | printf("tcgetattr failed: errno=%d\n", errno); | |
72 | } | |
73 | ||
74 | otermios = termios; | |
75 | ||
76 | termios.c_iflag = 0; | |
77 | termios.c_oflag = 0; | |
78 | termios.c_lflag = 0; | |
79 | termios.c_cc[VMIN] = 0; | |
80 | termios.c_cc[VTIME] = 0; | |
81 | ||
82 | if (tcsetattr(desc, TCSANOW, &termios)) { | |
83 | printf("tcgetattr failed: errno=%d\n", errno); | |
84 | } | |
85 | ||
86 | return 1; | |
87 | } | |
88 | ||
89 | int | |
b52373a2 JG |
90 | serial_timedreadchar (timeout, ok) |
91 | int timeout; | |
92 | int *ok; | |
ae0ea72e SC |
93 | { |
94 | unsigned char buf; | |
95 | fd_set readfds; | |
96 | int val; | |
97 | struct timeval tv; | |
98 | ||
99 | FD_ZERO(&readfds); | |
100 | FD_SET(desc, &readfds); | |
101 | ||
102 | tv.tv_sec = timeout; | |
103 | tv.tv_usec = 0; | |
104 | ||
105 | val = select(desc+1, &readfds, 0, 0, &tv); | |
106 | ||
107 | if (val > 0 && FD_ISSET(desc, &readfds)) | |
108 | { | |
109 | val = read (desc, &buf, 1); | |
110 | ||
111 | if (val == 1) | |
112 | { | |
113 | *ok = 1; | |
114 | return buf; | |
115 | } | |
116 | } | |
117 | ||
118 | *ok = 0; | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | /* Translate baud rates from integers to damn B_codes. Unix should | |
124 | have outgrown this crap years ago, but even POSIX wouldn't buck it. */ | |
125 | ||
126 | #ifndef B19200 | |
127 | #define B19200 EXTA | |
128 | #endif | |
129 | #ifndef B38400 | |
130 | #define B38400 EXTB | |
131 | #endif | |
132 | ||
133 | static struct {int rate, damn_b;} baudtab[] = { | |
134 | {9600, B9600}, | |
135 | ||
136 | {19200, B19200}, | |
b52373a2 | 137 | {38400, B38400}, |
ae0ea72e SC |
138 | #if 0 |
139 | {300, B300}, | |
140 | {1200, B1200}, | |
141 | {2400, B2400}, | |
142 | {4800, B4800}, | |
143 | #endif | |
144 | {-1, -1}, | |
145 | }; | |
146 | ||
147 | static int | |
b52373a2 JG |
148 | damn_b (rate) |
149 | int rate; | |
ae0ea72e SC |
150 | { |
151 | int i; | |
152 | for (i = 0; baudtab[i].rate != -1; i++) | |
153 | { | |
154 | if (rate == baudtab[i].rate) | |
155 | { | |
156 | return i; | |
157 | } | |
158 | } | |
159 | return -1; | |
160 | } | |
161 | ||
162 | int | |
b52373a2 JG |
163 | serial_setbaudrate (rate) |
164 | int rate; | |
ae0ea72e SC |
165 | { |
166 | struct termios termios; | |
167 | ||
168 | if (tcgetattr(desc, &termios)) { | |
169 | printf("tcgetattr failed: errno=%d\n", errno); | |
170 | } | |
171 | ||
172 | cfsetospeed(&termios, baudtab[damn_b(rate)].damn_b); | |
173 | cfsetispeed(&termios, baudtab[damn_b(rate)].damn_b); | |
174 | ||
175 | if (tcsetattr(desc, TCSANOW, &termios)) { | |
176 | printf("tcgetattr failed: errno=%d\n", errno); | |
177 | } | |
178 | ||
179 | return 1; | |
180 | } | |
181 | ||
182 | int | |
b52373a2 JG |
183 | serial_nextbaudrate (rate) |
184 | int rate; | |
ae0ea72e SC |
185 | { |
186 | int lookup; | |
187 | lookup = damn_b(rate); | |
188 | if (lookup == -1) | |
189 | return baudtab[0].rate; | |
190 | lookup++; | |
191 | if (baudtab[lookup].rate == -1) | |
192 | return baudtab[0].rate; | |
193 | return baudtab[lookup].rate; | |
194 | } | |
195 | ||
196 | int | |
b52373a2 JG |
197 | serial_write (str, len) |
198 | const char *str; | |
199 | int len; | |
ae0ea72e | 200 | { |
e676a15f | 201 | return (write (desc, str, len)); |
ae0ea72e SC |
202 | } |
203 | ||
204 | ||
205 | int | |
b52373a2 | 206 | serial_close () |
ae0ea72e | 207 | { |
e676a15f | 208 | return (close(desc)); |
ae0ea72e | 209 | } |