4 * Copyright (c) 2003-2008 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
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"
33 #include "chardev/char-win.h"
35 #include <sys/ioctl.h>
37 #include "chardev/char-fd.h"
40 #include "chardev/char-serial.h"
44 static void qmp_chardev_open_serial(Chardev *chr,
45 ChardevBackend *backend,
49 ChardevHostdev *serial = backend->u.serial.data;
51 win_chr_serial_init(chr, serial->device, errp);
54 #elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
55 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
56 || defined(__GLIBC__) || defined(__APPLE__)
58 static void tty_serial_init(int fd, int speed,
59 int parity, int data_bits, int stop_bits)
61 struct termios tty = {0};
65 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
66 speed, parity, data_bits, stop_bits);
70 #define check_speed(val) \
76 speed = speed * 10 / 11;
92 /* Non-Posix values follow. They may be unsupported on some systems. */
111 check_speed(1000000);
114 check_speed(1152000);
117 check_speed(1500000);
120 check_speed(2000000);
123 check_speed(2500000);
126 check_speed(3000000);
129 check_speed(3500000);
132 check_speed(4000000);
138 cfsetispeed(&tty, spd);
139 cfsetospeed(&tty, spd);
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);
166 tty.c_cflag |= PARENB;
169 tty.c_cflag |= PARENB | PARODD;
172 if (stop_bits == 2) {
173 tty.c_cflag |= CSTOPB;
176 tcsetattr(fd, TCSANOW, &tty);
179 static int tty_serial_ioctl(Chardev *chr, int cmd, void *arg)
181 FDChardev *s = FD_CHARDEV(chr);
182 QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc_in);
185 case CHR_IOCTL_SERIAL_SET_PARAMS:
187 QEMUSerialSetParams *ssp = arg;
188 tty_serial_init(fioc->fd,
189 ssp->speed, ssp->parity,
190 ssp->data_bits, ssp->stop_bits);
193 case CHR_IOCTL_SERIAL_SET_BREAK:
195 int enable = *(int *)arg;
197 tcsendbreak(fioc->fd, 1);
201 case CHR_IOCTL_SERIAL_GET_TIOCM:
204 int *targ = (int *)arg;
205 ioctl(fioc->fd, TIOCMGET, &sarg);
207 if (sarg & TIOCM_CTS) {
208 *targ |= CHR_TIOCM_CTS;
210 if (sarg & TIOCM_CAR) {
211 *targ |= CHR_TIOCM_CAR;
213 if (sarg & TIOCM_DSR) {
214 *targ |= CHR_TIOCM_DSR;
216 if (sarg & TIOCM_RI) {
217 *targ |= CHR_TIOCM_RI;
219 if (sarg & TIOCM_DTR) {
220 *targ |= CHR_TIOCM_DTR;
222 if (sarg & TIOCM_RTS) {
223 *targ |= CHR_TIOCM_RTS;
227 case CHR_IOCTL_SERIAL_SET_TIOCM:
229 int sarg = *(int *)arg;
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) {
237 if (sarg & CHR_TIOCM_CAR) {
240 if (sarg & CHR_TIOCM_DSR) {
243 if (sarg & CHR_TIOCM_RI) {
246 if (sarg & CHR_TIOCM_DTR) {
249 if (sarg & CHR_TIOCM_RTS) {
252 ioctl(fioc->fd, TIOCMSET, &targ);
261 static void qmp_chardev_open_serial(Chardev *chr,
262 ChardevBackend *backend,
266 ChardevHostdev *serial = backend->u.serial.data;
269 fd = qmp_chardev_open_file_source(serial->device, O_RDWR | O_NONBLOCK,
274 if (!g_unix_set_fd_nonblocking(fd, true, NULL)) {
275 error_setg_errno(errp, errno, "Failed to set FD nonblocking");
278 tty_serial_init(fd, 115200, 'N', 8, 1);
280 qemu_chr_open_fd(chr, fd, fd);
282 #endif /* __linux__ || __sun__ */
284 #ifdef HAVE_CHARDEV_SERIAL
285 static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
288 const char *device = qemu_opt_get(opts, "path");
289 ChardevHostdev *serial;
291 if (device == NULL) {
292 error_setg(errp, "chardev: serial/tty: no device path given");
295 backend->type = CHARDEV_BACKEND_KIND_SERIAL;
296 serial = backend->u.serial.data = g_new0(ChardevHostdev, 1);
297 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(serial));
298 serial->device = g_strdup(device);
301 static void char_serial_class_init(ObjectClass *oc, void *data)
303 ChardevClass *cc = CHARDEV_CLASS(oc);
305 cc->parse = qemu_chr_parse_serial;
306 cc->open = qmp_chardev_open_serial;
308 cc->chr_ioctl = tty_serial_ioctl;
313 static const TypeInfo char_serial_type_info = {
314 .name = TYPE_CHARDEV_SERIAL,
316 .parent = TYPE_CHARDEV_WIN,
318 .parent = TYPE_CHARDEV_FD,
320 .class_init = char_serial_class_init,
323 static void register_types(void)
325 type_register_static(&char_serial_type_info);
328 type_init(register_types);