1 | /*===============================================================*\ |
---|
2 | | File: serdbgio.c | |
---|
3 | +-----------------------------------------------------------------+ |
---|
4 | | Copyright (c) 2002 IMD | |
---|
5 | | Ingenieurbuero fuer Microcomputertechnik Th. Doerfler | |
---|
6 | | Hebststr. 8, 82178 Puchheim, Germany | |
---|
7 | | <Thomas.Doerfler@imd-systems.de> | |
---|
8 | | The license and distribution terms for this file may be | |
---|
9 | | found in the file LICENSE in this distribution or at | |
---|
10 | | http://www.OARcorp.com/rtems/license.html. | |
---|
11 | | all rights reserved | |
---|
12 | +-----------------------------------------------------------------+ |
---|
13 | | TERMIOS serial gdb interface support | |
---|
14 | | the functions in this file allow the standard gdb stubs like | |
---|
15 | | "m68k-stub.c" to access any serial interfaces that work with | |
---|
16 | | RTEMS termios in polled mode | |
---|
17 | | | |
---|
18 | +-----------------------------------------------------------------+ |
---|
19 | | date history ID | |
---|
20 | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
---|
21 | | 10.05.02 creation doe | |
---|
22 | |*****************************************************************| |
---|
23 | |* $Id$ |
---|
24 | * |
---|
25 | |*****************************************************************| |
---|
26 | \*===============================================================*/ |
---|
27 | |
---|
28 | #include <rtems.h> |
---|
29 | #include <rtems/libio_.h> |
---|
30 | #include <errno.h> |
---|
31 | #include <unistd.h> /* close */ |
---|
32 | #include <stdio.h> |
---|
33 | #include <fcntl.h> |
---|
34 | #include <termios.h> |
---|
35 | |
---|
36 | #include <rtems/termiostypes.h> |
---|
37 | #include <serdbg.h> |
---|
38 | |
---|
39 | |
---|
40 | /* |
---|
41 | * internal variables |
---|
42 | */ |
---|
43 | int serdbg_fd = -1; |
---|
44 | struct rtems_termios_tty *serdbg_tty; |
---|
45 | |
---|
46 | /*=========================================================================*\ |
---|
47 | | Function: | |
---|
48 | \*-------------------------------------------------------------------------*/ |
---|
49 | int serdbg_open |
---|
50 | |
---|
51 | /*-------------------------------------------------------------------------*\ |
---|
52 | | Purpose: | |
---|
53 | | try to open given serial debug port | |
---|
54 | +---------------------------------------------------------------------------+ |
---|
55 | | Input Parameters: | |
---|
56 | \*-------------------------------------------------------------------------*/ |
---|
57 | ( |
---|
58 | const char *dev_name, /* name of device to open */ |
---|
59 | unsigned32 baudrate /* baud rate to use */ |
---|
60 | ) |
---|
61 | /*-------------------------------------------------------------------------*\ |
---|
62 | | Return Value: | |
---|
63 | | 0 on success, -1 and errno otherwise | |
---|
64 | \*=========================================================================*/ |
---|
65 | { |
---|
66 | boolean err_occurred = FALSE; |
---|
67 | rtems_libio_t *iop = NULL; |
---|
68 | struct termios act_termios; |
---|
69 | tcflag_t baudcode = B0; |
---|
70 | |
---|
71 | #define FD_STORE_CNT 3 |
---|
72 | int fd_store[FD_STORE_CNT]; |
---|
73 | int fd_store_used = 0; |
---|
74 | |
---|
75 | /* |
---|
76 | * translate baudrate into baud code |
---|
77 | */ |
---|
78 | switch(baudrate) { |
---|
79 | case 50: baudcode = B50; break; |
---|
80 | case 75: baudcode = B75; break; |
---|
81 | case 110: baudcode = B110; break; |
---|
82 | case 134: baudcode = B134; break; |
---|
83 | case 150: baudcode = B150; break; |
---|
84 | case 200: baudcode = B200; break; |
---|
85 | case 300: baudcode = B300; break; |
---|
86 | case 600: baudcode = B600; break; |
---|
87 | case 1200: baudcode = B1200; break; |
---|
88 | case 1800: baudcode = B1800; break; |
---|
89 | case 2400: baudcode = B2400; break; |
---|
90 | case 4800: baudcode = B4800; break; |
---|
91 | case 9600: baudcode = B9600; break; |
---|
92 | case 19200: baudcode = B19200; break; |
---|
93 | case 38400: baudcode = B38400; break; |
---|
94 | case 57600: baudcode = B57600; break; |
---|
95 | case 115200: baudcode = B115200; break; |
---|
96 | case 230400: baudcode = B230400; break; |
---|
97 | case 460800: baudcode = B460800; break; |
---|
98 | default : err_occurred = TRUE; errno = EINVAL; break; |
---|
99 | } |
---|
100 | |
---|
101 | /* |
---|
102 | * open device for serdbg operation |
---|
103 | * skip any fds that are between 0..2, because they are |
---|
104 | * reserved for stdin/out/err |
---|
105 | */ |
---|
106 | if (!err_occurred && |
---|
107 | (dev_name != NULL) && |
---|
108 | (dev_name[0] != '\0')) { |
---|
109 | do { |
---|
110 | serdbg_fd = open(dev_name,O_RDWR); |
---|
111 | if (serdbg_fd < 0) { |
---|
112 | err_occurred = TRUE; |
---|
113 | } |
---|
114 | else { |
---|
115 | if (serdbg_fd < 3) { |
---|
116 | if (fd_store_used >= FD_STORE_CNT) { |
---|
117 | err_occurred = TRUE; |
---|
118 | } |
---|
119 | else { |
---|
120 | fd_store[fd_store_used++] = serdbg_fd; |
---|
121 | } |
---|
122 | } |
---|
123 | } |
---|
124 | } while (!err_occurred && |
---|
125 | (serdbg_fd < 3)); |
---|
126 | } |
---|
127 | /* |
---|
128 | * close any fds, that have been placed in fd_store |
---|
129 | * so fd 0..2 are reusable again |
---|
130 | */ |
---|
131 | while (--fd_store_used >= 0) { |
---|
132 | close(fd_store[fd_store_used]); |
---|
133 | } |
---|
134 | |
---|
135 | /* |
---|
136 | * capture tty structure |
---|
137 | */ |
---|
138 | if (!err_occurred) { |
---|
139 | iop = &rtems_libio_iops[serdbg_fd]; |
---|
140 | serdbg_tty = iop->data1; |
---|
141 | } |
---|
142 | /* |
---|
143 | * set device baudrate |
---|
144 | * (and transp mode, this is not really needed) |
---|
145 | * ... |
---|
146 | */ |
---|
147 | /* |
---|
148 | * ... get fd settings |
---|
149 | */ |
---|
150 | if (!err_occurred && |
---|
151 | (0 != tcgetattr(serdbg_fd,&act_termios))) { |
---|
152 | err_occurred = TRUE; |
---|
153 | } |
---|
154 | if (!err_occurred) { |
---|
155 | act_termios.c_iflag |
---|
156 | &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP |
---|
157 | |INLCR|IGNCR|ICRNL|IXON); |
---|
158 | act_termios.c_oflag |
---|
159 | &= ~OPOST; |
---|
160 | |
---|
161 | act_termios.c_lflag |
---|
162 | &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN); |
---|
163 | |
---|
164 | cfsetospeed(&act_termios,baudcode); |
---|
165 | cfsetispeed(&act_termios,baudcode); |
---|
166 | |
---|
167 | if (0 != tcsetattr(serdbg_fd,TCSANOW,&act_termios)) { |
---|
168 | err_occurred = TRUE; |
---|
169 | } |
---|
170 | } |
---|
171 | return (err_occurred |
---|
172 | ? -1 |
---|
173 | : 0); |
---|
174 | } |
---|
175 | |
---|
176 | void putDebugChar(char c) __attribute__ ((__weak__)); |
---|
177 | /*=========================================================================*\ |
---|
178 | | Function: | |
---|
179 | \*-------------------------------------------------------------------------*/ |
---|
180 | void putDebugChar |
---|
181 | /*-------------------------------------------------------------------------*\ |
---|
182 | | Purpose: | |
---|
183 | | send one character to serial port | |
---|
184 | +---------------------------------------------------------------------------+ |
---|
185 | | Input Parameters: | |
---|
186 | \*-------------------------------------------------------------------------*/ |
---|
187 | ( |
---|
188 | char c /* character to print */ |
---|
189 | ) |
---|
190 | /*-------------------------------------------------------------------------*\ |
---|
191 | | Return Value: | |
---|
192 | | <none> | |
---|
193 | \*=========================================================================*/ |
---|
194 | { |
---|
195 | /* |
---|
196 | * call serdbg polling callout, if available |
---|
197 | */ |
---|
198 | if (serdbg_conf.callout != NULL) { |
---|
199 | serdbg_conf.callout(); |
---|
200 | } |
---|
201 | /* |
---|
202 | * check, whether debug serial port is available |
---|
203 | */ |
---|
204 | if ((serdbg_tty != NULL) && |
---|
205 | (serdbg_tty->device.write != NULL)) { |
---|
206 | /* |
---|
207 | * send character to debug serial port |
---|
208 | */ |
---|
209 | serdbg_tty->device.write(serdbg_tty->minor,&c,1); |
---|
210 | } |
---|
211 | } |
---|
212 | |
---|
213 | int getDebugChar(void) __attribute__ ((__weak__)); |
---|
214 | /*=========================================================================*\ |
---|
215 | | Function: | |
---|
216 | \*-------------------------------------------------------------------------*/ |
---|
217 | int getDebugChar |
---|
218 | /*-------------------------------------------------------------------------*\ |
---|
219 | | Purpose: | |
---|
220 | | wait for one character from serial port | |
---|
221 | +---------------------------------------------------------------------------+ |
---|
222 | | Input Parameters: | |
---|
223 | \*-------------------------------------------------------------------------*/ |
---|
224 | ( |
---|
225 | void /* none */ |
---|
226 | ) |
---|
227 | /*-------------------------------------------------------------------------*\ |
---|
228 | | Return Value: | |
---|
229 | | received character | |
---|
230 | \*=========================================================================*/ |
---|
231 | { |
---|
232 | int c = -1; |
---|
233 | /* |
---|
234 | * check, whether debug serial port is available |
---|
235 | */ |
---|
236 | if ((serdbg_tty != NULL) && |
---|
237 | (serdbg_tty->device.pollRead != NULL)) { |
---|
238 | do { |
---|
239 | /* |
---|
240 | * call serdbg polling callout, if available |
---|
241 | */ |
---|
242 | if (serdbg_conf.callout != NULL) { |
---|
243 | serdbg_conf.callout(); |
---|
244 | } |
---|
245 | /* |
---|
246 | * get character from debug serial port |
---|
247 | */ |
---|
248 | c = serdbg_tty->device.pollRead(serdbg_tty->minor); |
---|
249 | } while (c < 0); |
---|
250 | } |
---|
251 | return c; |
---|
252 | } |
---|
253 | |
---|