diff options
Diffstat (limited to 'chardev/char-serial.c')
| -rw-r--r-- | chardev/char-serial.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/chardev/char-serial.c b/chardev/char-serial.c new file mode 100644 index 0000000000..094e08dca5 --- /dev/null +++ b/chardev/char-serial.c @@ -0,0 +1,318 @@ +/* + * QEMU System Emulator + * + * Copyright (c) 2003-2008 Fabrice Bellard + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/osdep.h" +#include "qemu/sockets.h" +#include "io/channel-file.h" +#include "qapi/error.h" + +#ifdef _WIN32 +#include "char-win.h" +#else +#include <sys/ioctl.h> +#include <termios.h> +#include "char-fd.h" +#endif + +#include "char-serial.h" + +#ifdef _WIN32 + +static void qmp_chardev_open_serial(Chardev *chr, + ChardevBackend *backend, + bool *be_opened, + Error **errp) +{ + ChardevHostdev *serial = backend->u.serial.data; + + win_chr_init(chr, serial->device, errp); +} + +#elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ + || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \ + || defined(__GLIBC__) + +static void tty_serial_init(int fd, int speed, + int parity, int data_bits, int stop_bits) +{ + struct termios tty; + speed_t spd; + +#if 0 + printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n", + speed, parity, data_bits, stop_bits); +#endif + tcgetattr(fd, &tty); + +#define check_speed(val) if (speed <= val) { spd = B##val; break; } + speed = speed * 10 / 11; + do { + check_speed(50); + check_speed(75); + check_speed(110); + check_speed(134); + check_speed(150); + check_speed(200); + check_speed(300); + check_speed(600); + check_speed(1200); + check_speed(1800); + check_speed(2400); + check_speed(4800); + check_speed(9600); + check_speed(19200); + check_speed(38400); + /* Non-Posix values follow. They may be unsupported on some systems. */ + check_speed(57600); + check_speed(115200); +#ifdef B230400 + check_speed(230400); +#endif +#ifdef B460800 + check_speed(460800); +#endif +#ifdef B500000 + check_speed(500000); +#endif +#ifdef B576000 + check_speed(576000); +#endif +#ifdef B921600 + check_speed(921600); +#endif +#ifdef B1000000 + check_speed(1000000); +#endif +#ifdef B1152000 + check_speed(1152000); +#endif +#ifdef B1500000 + check_speed(1500000); +#endif +#ifdef B2000000 + check_speed(2000000); +#endif +#ifdef B2500000 + check_speed(2500000); +#endif +#ifdef B3000000 + check_speed(3000000); +#endif +#ifdef B3500000 + check_speed(3500000); +#endif +#ifdef B4000000 + check_speed(4000000); +#endif + spd = B115200; + } while (0); + + cfsetispeed(&tty, spd); + cfsetospeed(&tty, spd); + + tty.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP + | INLCR | IGNCR | ICRNL | IXON); + tty.c_oflag |= OPOST; + tty.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN | ISIG); + tty.c_cflag &= ~(CSIZE | PARENB | PARODD | CRTSCTS | CSTOPB); + switch (data_bits) { + default: + case 8: + tty.c_cflag |= CS8; + break; + case 7: + tty.c_cflag |= CS7; + break; + case 6: + tty.c_cflag |= CS6; + break; + case 5: + tty.c_cflag |= CS5; + break; + } + switch (parity) { + default: + case 'N': + break; + case 'E': + tty.c_cflag |= PARENB; + break; + case 'O': + tty.c_cflag |= PARENB | PARODD; + break; + } + if (stop_bits == 2) { + tty.c_cflag |= CSTOPB; + } + + tcsetattr(fd, TCSANOW, &tty); +} + +static int tty_serial_ioctl(Chardev *chr, int cmd, void *arg) +{ + FDChardev *s = FD_CHARDEV(chr); + QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc_in); + + switch (cmd) { + case CHR_IOCTL_SERIAL_SET_PARAMS: + { + QEMUSerialSetParams *ssp = arg; + tty_serial_init(fioc->fd, + ssp->speed, ssp->parity, + ssp->data_bits, ssp->stop_bits); + } + break; + case CHR_IOCTL_SERIAL_SET_BREAK: + { + int enable = *(int *)arg; + if (enable) { + tcsendbreak(fioc->fd, 1); + } + } + break; + case CHR_IOCTL_SERIAL_GET_TIOCM: + { + int sarg = 0; + int *targ = (int *)arg; + ioctl(fioc->fd, TIOCMGET, &sarg); + *targ = 0; + if (sarg & TIOCM_CTS) { + *targ |= CHR_TIOCM_CTS; + } + if (sarg & TIOCM_CAR) { + *targ |= CHR_TIOCM_CAR; + } + if (sarg & TIOCM_DSR) { + *targ |= CHR_TIOCM_DSR; + } + if (sarg & TIOCM_RI) { + *targ |= CHR_TIOCM_RI; + } + if (sarg & TIOCM_DTR) { + *targ |= CHR_TIOCM_DTR; + } + if (sarg & TIOCM_RTS) { + *targ |= CHR_TIOCM_RTS; + } + } + break; + case CHR_IOCTL_SERIAL_SET_TIOCM: + { + int sarg = *(int *)arg; + int targ = 0; + ioctl(fioc->fd, TIOCMGET, &targ); + targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR + | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS); + if (sarg & CHR_TIOCM_CTS) { + targ |= TIOCM_CTS; + } + if (sarg & CHR_TIOCM_CAR) { + targ |= TIOCM_CAR; + } + if (sarg & CHR_TIOCM_DSR) { + targ |= TIOCM_DSR; + } + if (sarg & CHR_TIOCM_RI) { + targ |= TIOCM_RI; + } + if (sarg & CHR_TIOCM_DTR) { + targ |= TIOCM_DTR; + } + if (sarg & CHR_TIOCM_RTS) { + targ |= TIOCM_RTS; + } + ioctl(fioc->fd, TIOCMSET, &targ); + } + break; + default: + return -ENOTSUP; + } + return 0; +} + +static void qmp_chardev_open_serial(Chardev *chr, + ChardevBackend *backend, + bool *be_opened, + Error **errp) +{ + ChardevHostdev *serial = backend->u.serial.data; + int fd; + + fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp); + if (fd < 0) { + return; + } + qemu_set_nonblock(fd); + tty_serial_init(fd, 115200, 'N', 8, 1); + + qemu_chr_open_fd(chr, fd, fd); +} +#endif /* __linux__ || __sun__ */ + +#ifdef HAVE_CHARDEV_SERIAL +static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend, + Error **errp) +{ + const char *device = qemu_opt_get(opts, "path"); + ChardevHostdev *serial; + + if (device == NULL) { + error_setg(errp, "chardev: serial/tty: no device path given"); + return; + } + backend->type = CHARDEV_BACKEND_KIND_SERIAL; + serial = backend->u.serial.data = g_new0(ChardevHostdev, 1); + qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(serial)); + serial->device = g_strdup(device); +} + +static void char_serial_class_init(ObjectClass *oc, void *data) +{ + ChardevClass *cc = CHARDEV_CLASS(oc); + + cc->parse = qemu_chr_parse_serial; + cc->open = qmp_chardev_open_serial; +#ifndef _WIN32 + cc->chr_ioctl = tty_serial_ioctl; +#endif +} + + +static const TypeInfo char_serial_type_info = { + .name = TYPE_CHARDEV_SERIAL, +#ifdef _WIN32 + .parent = TYPE_CHARDEV_WIN, +#else + .parent = TYPE_CHARDEV_FD, +#endif + .class_init = char_serial_class_init, +}; + +static void register_types(void) +{ + type_register_static(&char_serial_type_info); +} + +type_init(register_types); + +#endif |