539022dd60
The previous patch left in an extra scope layer for ease of review; time to remove it. No semantic change. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20171201232433.25193-5-eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
324 lines
8.3 KiB
C
324 lines
8.3 KiB
C
/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu/sockets.h"
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#include "io/channel-file.h"
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#include "qapi/error.h"
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#ifdef _WIN32
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#include "chardev/char-win.h"
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#else
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#include <sys/ioctl.h>
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#include <termios.h>
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#include "chardev/char-fd.h"
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#endif
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#include "chardev/char-serial.h"
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#ifdef _WIN32
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static void qmp_chardev_open_serial(Chardev *chr,
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ChardevBackend *backend,
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bool *be_opened,
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Error **errp)
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{
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ChardevHostdev *serial = backend->u.serial.data;
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win_chr_serial_init(chr, serial->device, errp);
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}
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#elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
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|| defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
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|| defined(__GLIBC__)
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static void tty_serial_init(int fd, int speed,
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int parity, int data_bits, int stop_bits)
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{
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struct termios tty;
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speed_t spd;
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#if 0
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printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
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speed, parity, data_bits, stop_bits);
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#endif
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tcgetattr(fd, &tty);
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#define check_speed(val) \
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if (speed <= val) { \
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spd = B##val; \
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goto done; \
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}
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speed = speed * 10 / 11;
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check_speed(50);
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check_speed(75);
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check_speed(110);
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check_speed(134);
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check_speed(150);
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check_speed(200);
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check_speed(300);
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check_speed(600);
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check_speed(1200);
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check_speed(1800);
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check_speed(2400);
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check_speed(4800);
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check_speed(9600);
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check_speed(19200);
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check_speed(38400);
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/* Non-Posix values follow. They may be unsupported on some systems. */
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check_speed(57600);
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check_speed(115200);
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#ifdef B230400
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check_speed(230400);
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#endif
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#ifdef B460800
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check_speed(460800);
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#endif
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#ifdef B500000
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check_speed(500000);
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#endif
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#ifdef B576000
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check_speed(576000);
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#endif
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#ifdef B921600
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check_speed(921600);
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#endif
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#ifdef B1000000
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check_speed(1000000);
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#endif
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#ifdef B1152000
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check_speed(1152000);
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#endif
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#ifdef B1500000
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check_speed(1500000);
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#endif
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#ifdef B2000000
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check_speed(2000000);
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#endif
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#ifdef B2500000
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check_speed(2500000);
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#endif
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#ifdef B3000000
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check_speed(3000000);
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#endif
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#ifdef B3500000
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check_speed(3500000);
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#endif
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#ifdef B4000000
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check_speed(4000000);
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#endif
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spd = B115200;
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#undef check_speed
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done:
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cfsetispeed(&tty, spd);
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cfsetospeed(&tty, spd);
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tty.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP
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| INLCR | IGNCR | ICRNL | IXON);
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tty.c_oflag |= OPOST;
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tty.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN | ISIG);
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tty.c_cflag &= ~(CSIZE | PARENB | PARODD | CRTSCTS | CSTOPB);
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switch (data_bits) {
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default:
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case 8:
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tty.c_cflag |= CS8;
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break;
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case 7:
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tty.c_cflag |= CS7;
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break;
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case 6:
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tty.c_cflag |= CS6;
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break;
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case 5:
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tty.c_cflag |= CS5;
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break;
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}
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switch (parity) {
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default:
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case 'N':
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break;
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case 'E':
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tty.c_cflag |= PARENB;
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break;
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case 'O':
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tty.c_cflag |= PARENB | PARODD;
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break;
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}
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if (stop_bits == 2) {
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tty.c_cflag |= CSTOPB;
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}
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tcsetattr(fd, TCSANOW, &tty);
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}
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static int tty_serial_ioctl(Chardev *chr, int cmd, void *arg)
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{
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FDChardev *s = FD_CHARDEV(chr);
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QIOChannelFile *fioc = QIO_CHANNEL_FILE(s->ioc_in);
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switch (cmd) {
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case CHR_IOCTL_SERIAL_SET_PARAMS:
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{
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QEMUSerialSetParams *ssp = arg;
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tty_serial_init(fioc->fd,
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ssp->speed, ssp->parity,
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ssp->data_bits, ssp->stop_bits);
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}
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break;
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case CHR_IOCTL_SERIAL_SET_BREAK:
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{
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int enable = *(int *)arg;
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if (enable) {
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tcsendbreak(fioc->fd, 1);
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}
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}
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break;
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case CHR_IOCTL_SERIAL_GET_TIOCM:
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{
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int sarg = 0;
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int *targ = (int *)arg;
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ioctl(fioc->fd, TIOCMGET, &sarg);
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*targ = 0;
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if (sarg & TIOCM_CTS) {
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*targ |= CHR_TIOCM_CTS;
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}
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if (sarg & TIOCM_CAR) {
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*targ |= CHR_TIOCM_CAR;
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}
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if (sarg & TIOCM_DSR) {
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*targ |= CHR_TIOCM_DSR;
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}
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if (sarg & TIOCM_RI) {
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*targ |= CHR_TIOCM_RI;
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}
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if (sarg & TIOCM_DTR) {
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*targ |= CHR_TIOCM_DTR;
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}
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if (sarg & TIOCM_RTS) {
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*targ |= CHR_TIOCM_RTS;
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}
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}
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break;
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case CHR_IOCTL_SERIAL_SET_TIOCM:
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{
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int sarg = *(int *)arg;
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int targ = 0;
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ioctl(fioc->fd, TIOCMGET, &targ);
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targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
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| CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
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if (sarg & CHR_TIOCM_CTS) {
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targ |= TIOCM_CTS;
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}
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if (sarg & CHR_TIOCM_CAR) {
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targ |= TIOCM_CAR;
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}
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if (sarg & CHR_TIOCM_DSR) {
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targ |= TIOCM_DSR;
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}
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if (sarg & CHR_TIOCM_RI) {
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targ |= TIOCM_RI;
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}
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if (sarg & CHR_TIOCM_DTR) {
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targ |= TIOCM_DTR;
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}
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if (sarg & CHR_TIOCM_RTS) {
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targ |= TIOCM_RTS;
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}
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ioctl(fioc->fd, TIOCMSET, &targ);
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}
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break;
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default:
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return -ENOTSUP;
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}
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return 0;
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}
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static void qmp_chardev_open_serial(Chardev *chr,
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ChardevBackend *backend,
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bool *be_opened,
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Error **errp)
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{
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ChardevHostdev *serial = backend->u.serial.data;
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int fd;
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fd = qmp_chardev_open_file_source(serial->device, O_RDWR, errp);
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if (fd < 0) {
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return;
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}
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qemu_set_nonblock(fd);
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tty_serial_init(fd, 115200, 'N', 8, 1);
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qemu_chr_open_fd(chr, fd, fd);
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}
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#endif /* __linux__ || __sun__ */
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#ifdef HAVE_CHARDEV_SERIAL
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static void qemu_chr_parse_serial(QemuOpts *opts, ChardevBackend *backend,
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Error **errp)
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{
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const char *device = qemu_opt_get(opts, "path");
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ChardevHostdev *serial;
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if (device == NULL) {
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error_setg(errp, "chardev: serial/tty: no device path given");
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return;
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}
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backend->type = CHARDEV_BACKEND_KIND_SERIAL;
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serial = backend->u.serial.data = g_new0(ChardevHostdev, 1);
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qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(serial));
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serial->device = g_strdup(device);
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}
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static void char_serial_class_init(ObjectClass *oc, void *data)
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{
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ChardevClass *cc = CHARDEV_CLASS(oc);
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cc->parse = qemu_chr_parse_serial;
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cc->open = qmp_chardev_open_serial;
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#ifndef _WIN32
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cc->chr_ioctl = tty_serial_ioctl;
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#endif
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}
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static const TypeInfo char_serial_type_info = {
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.name = TYPE_CHARDEV_SERIAL,
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#ifdef _WIN32
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.parent = TYPE_CHARDEV_WIN,
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#else
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.parent = TYPE_CHARDEV_FD,
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#endif
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.class_init = char_serial_class_init,
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};
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static void register_types(void)
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{
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type_register_static(&char_serial_type_info);
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}
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type_init(register_types);
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#endif
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