1 | /* |
2 | * QEMU System Emulator |
3 | * |
4 | * Copyright (c) 2003-2008 Fabrice Bellard |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal |
8 | * in the Software without restriction, including without limitation the rights |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
10 | * copies of the Software, and to permit persons to whom the Software is |
11 | * furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
22 | * THE SOFTWARE. |
23 | */ |
24 | |
25 | #include "qemu/osdep.h" |
26 | #include "qemu/module.h" |
27 | #include "qemu/option.h" |
28 | #include "qemu/sockets.h" |
29 | #include "io/channel-file.h" |
30 | #include "qapi/error.h" |
31 | |
32 | #ifdef _WIN32 |
33 | #include "chardev/char-win.h" |
34 | #else |
35 | #include <sys/ioctl.h> |
36 | #include <termios.h> |
37 | #include "chardev/char-fd.h" |
38 | #endif |
39 | |
40 | #include "chardev/char-serial.h" |
41 | |
42 | #ifdef _WIN32 |
43 | |
44 | static void qmp_chardev_open_serial(Chardev *chr, |
45 | ChardevBackend *backend, |
46 | bool *be_opened, |
47 | Error **errp) |
48 | { |
49 | ChardevHostdev *serial = backend->u.serial.data; |
50 | |
51 | win_chr_serial_init(chr, serial->device, errp); |
52 | } |
53 | |
54 | #elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ |
55 | || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \ |
56 | || defined(__GLIBC__) |
57 | |
58 | static void tty_serial_init(int fd, int speed, |
59 | int parity, int data_bits, int stop_bits) |
60 | { |
61 | struct termios tty = {0}; |
62 | speed_t spd; |
63 | |
64 | #if 0 |
65 | printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n" , |
66 | speed, parity, data_bits, stop_bits); |
67 | #endif |
68 | tcgetattr(fd, &tty); |
69 | |
70 | #define check_speed(val) \ |
71 | if (speed <= val) { \ |
72 | spd = B##val; \ |
73 | goto done; \ |
74 | } |
75 | |
76 | speed = speed * 10 / 11; |
77 | check_speed(50); |
78 | check_speed(75); |
79 | check_speed(110); |
80 | check_speed(134); |
81 | check_speed(150); |
82 | check_speed(200); |
83 | check_speed(300); |
84 | check_speed(600); |
85 | check_speed(1200); |
86 | check_speed(1800); |
87 | check_speed(2400); |
88 | check_speed(4800); |
89 | check_speed(9600); |
90 | check_speed(19200); |
91 | check_speed(38400); |
92 | /* Non-Posix values follow. They may be unsupported on some systems. */ |
93 | check_speed(57600); |
94 | check_speed(115200); |
95 | #ifdef B230400 |
96 | check_speed(230400); |
97 | #endif |
98 | #ifdef B460800 |
99 | check_speed(460800); |
100 | #endif |
101 | #ifdef B500000 |
102 | check_speed(500000); |
103 | #endif |
104 | #ifdef B576000 |
105 | check_speed(576000); |
106 | #endif |
107 | #ifdef B921600 |
108 | check_speed(921600); |
109 | #endif |
110 | #ifdef B1000000 |
111 | check_speed(1000000); |
112 | #endif |
113 | #ifdef B1152000 |
114 | check_speed(1152000); |
115 | #endif |
116 | #ifdef B1500000 |
117 | check_speed(1500000); |
118 | #endif |
119 | #ifdef B2000000 |
120 | check_speed(2000000); |
121 | #endif |
122 | #ifdef B2500000 |
123 | check_speed(2500000); |
124 | #endif |
125 | #ifdef B3000000 |
126 | check_speed(3000000); |
127 | #endif |
128 | #ifdef B3500000 |
129 | check_speed(3500000); |
130 | #endif |
131 | #ifdef B4000000 |
132 | check_speed(4000000); |
133 | #endif |
134 | spd = B115200; |
135 | |
136 | #undef check_speed |
137 | done: |
138 | cfsetispeed(&tty, spd); |
139 | cfsetospeed(&tty, spd); |
140 | |
141 | tty.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP |
142 | | INLCR | IGNCR | ICRNL | IXON); |
143 | tty.c_oflag &= ~OPOST; |
144 | tty.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN | ISIG); |
145 | tty.c_cflag &= ~(CSIZE | PARENB | PARODD | CRTSCTS | CSTOPB); |
146 | switch (data_bits) { |
147 | default: |
148 | case 8: |
149 | tty.c_cflag |= CS8; |
150 | break; |
151 | case 7: |
152 | tty.c_cflag |= CS7; |
153 | break; |
154 | case 6: |
155 | tty.c_cflag |= CS6; |
156 | break; |
157 | case 5: |
158 | tty.c_cflag |= CS5; |
159 | break; |
160 | } |
161 | switch (parity) { |
162 | default: |
163 | case 'N': |
164 | break; |
165 | case 'E': |
166 | tty.c_cflag |= PARENB; |
167 | break; |
168 | case 'O': |
169 | tty.c_cflag |= PARENB | PARODD; |
170 | break; |
171 | } |
172 | if (stop_bits == 2) { |
173 | tty.c_cflag |= CSTOPB; |
174 | } |
175 | |
176 | tcsetattr(fd, TCSANOW, &tty); |
177 | } |
178 | |
179 | static int tty_serial_ioctl(Chardev *chr, int cmd, void *arg) |
180 | { |
181 | FDChardev *s = FD_CHARDEV(chr); |
182 | QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc_in); |
183 | |
184 | switch (cmd) { |
185 | case CHR_IOCTL_SERIAL_SET_PARAMS: |
186 | { |
187 | QEMUSerialSetParams *ssp = arg; |
188 | tty_serial_init(fioc->fd, |
189 | ssp->speed, ssp->parity, |
190 | ssp->data_bits, ssp->stop_bits); |
191 | } |
192 | break; |
193 | case CHR_IOCTL_SERIAL_SET_BREAK: |
194 | { |
195 | int enable = *(int *)arg; |
196 | if (enable) { |
197 | tcsendbreak(fioc->fd, 1); |
198 | } |
199 | } |
200 | break; |
201 | case CHR_IOCTL_SERIAL_GET_TIOCM: |
202 | { |
203 | int sarg = 0; |
204 | int *targ = (int *)arg; |
205 | ioctl(fioc->fd, TIOCMGET, &sarg); |
206 | *targ = 0; |
207 | if (sarg & TIOCM_CTS) { |
208 | *targ |= CHR_TIOCM_CTS; |
209 | } |
210 | if (sarg & TIOCM_CAR) { |
211 | *targ |= CHR_TIOCM_CAR; |
212 | } |
213 | if (sarg & TIOCM_DSR) { |
214 | *targ |= CHR_TIOCM_DSR; |
215 | } |
216 | if (sarg & TIOCM_RI) { |
217 | *targ |= CHR_TIOCM_RI; |
218 | } |
219 | if (sarg & TIOCM_DTR) { |
220 | *targ |= CHR_TIOCM_DTR; |
221 | } |
222 | if (sarg & TIOCM_RTS) { |
223 | *targ |= CHR_TIOCM_RTS; |
224 | } |
225 | } |
226 | break; |
227 | case CHR_IOCTL_SERIAL_SET_TIOCM: |
228 | { |
229 | int sarg = *(int *)arg; |
230 | int targ = 0; |
231 | ioctl(fioc->fd, TIOCMGET, &targ); |
232 | targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR |
233 | | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS); |
234 | if (sarg & CHR_TIOCM_CTS) { |
235 | targ |= TIOCM_CTS; |
236 | } |
237 | if (sarg & CHR_TIOCM_CAR) { |
238 | targ |= TIOCM_CAR; |
239 | } |
240 | if (sarg & CHR_TIOCM_DSR) { |
241 | targ |= TIOCM_DSR; |
242 | } |
243 | if (sarg & CHR_TIOCM_RI) { |
244 | targ |= TIOCM_RI; |
245 | } |
246 | if (sarg & CHR_TIOCM_DTR) { |
247 | targ |= TIOCM_DTR; |
248 | } |
249 | if (sarg & CHR_TIOCM_RTS) { |
250 | targ |= TIOCM_RTS; |
251 | } |
252 | ioctl(fioc->fd, TIOCMSET, &targ); |
253 | } |
254 | break; |
255 | default: |
256 | return -ENOTSUP; |
257 | } |
258 | return 0; |
259 | } |
260 | |
261 | static void qmp_chardev_open_serial(Chardev *chr, |
262 | ChardevBackend *backend, |
263 | bool *be_opened, |
264 | Error **errp) |
265 | { |
266 | ChardevHostdev *serial = backend->u.serial.data; |
267 | int fd; |
268 | |
269 | fd = qmp_chardev_open_file_source(serial->device, O_RDWR | O_NONBLOCK, |
270 | errp); |
271 | if (fd < 0) { |
272 | return; |
273 | } |
274 | qemu_set_nonblock(fd); |
275 | tty_serial_init(fd, 115200, 'N', 8, 1); |
276 | |
277 | qemu_chr_open_fd(chr, fd, fd); |
278 | } |
279 | #endif /* __linux__ || __sun__ */ |
280 | |
281 | #ifdef HAVE_CHARDEV_SERIAL |
282 | static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend, |
283 | Error **errp) |
284 | { |
285 | const char *device = qemu_opt_get(opts, "path" ); |
286 | ChardevHostdev *serial; |
287 | |
288 | if (device == NULL) { |
289 | error_setg(errp, "chardev: serial/tty: no device path given" ); |
290 | return; |
291 | } |
292 | backend->type = CHARDEV_BACKEND_KIND_SERIAL; |
293 | serial = backend->u.serial.data = g_new0(ChardevHostdev, 1); |
294 | qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(serial)); |
295 | serial->device = g_strdup(device); |
296 | } |
297 | |
298 | static void char_serial_class_init(ObjectClass *oc, void *data) |
299 | { |
300 | ChardevClass *cc = CHARDEV_CLASS(oc); |
301 | |
302 | cc->parse = qemu_chr_parse_serial; |
303 | cc->open = qmp_chardev_open_serial; |
304 | #ifndef _WIN32 |
305 | cc->chr_ioctl = tty_serial_ioctl; |
306 | #endif |
307 | } |
308 | |
309 | |
310 | static const TypeInfo char_serial_type_info = { |
311 | .name = TYPE_CHARDEV_SERIAL, |
312 | #ifdef _WIN32 |
313 | .parent = TYPE_CHARDEV_WIN, |
314 | #else |
315 | .parent = TYPE_CHARDEV_FD, |
316 | #endif |
317 | .class_init = char_serial_class_init, |
318 | }; |
319 | |
320 | static void register_types(void) |
321 | { |
322 | type_register_static(&char_serial_type_info); |
323 | } |
324 | |
325 | type_init(register_types); |
326 | |
327 | #endif |
328 | |