mirror of https://gitee.com/openkylin/qemu.git
serial: Support additional serial speed values
* Allow any speed value which is defined for Linux (and possibly other systems). * Compare int values instead of double values. Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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parent
66a6593a8c
commit
45eea13b24
87
qemu-char.c
87
qemu-char.c
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@ -1007,33 +1007,68 @@ static void tty_serial_init(int fd, int speed,
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#endif
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tcgetattr (fd, &tty);
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#define MARGIN 1.1
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if (speed <= 50 * MARGIN)
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spd = B50;
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else if (speed <= 75 * MARGIN)
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spd = B75;
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else if (speed <= 300 * MARGIN)
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spd = B300;
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else if (speed <= 600 * MARGIN)
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spd = B600;
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else if (speed <= 1200 * MARGIN)
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spd = B1200;
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else if (speed <= 2400 * MARGIN)
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spd = B2400;
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else if (speed <= 4800 * MARGIN)
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spd = B4800;
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else if (speed <= 9600 * MARGIN)
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spd = B9600;
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else if (speed <= 19200 * MARGIN)
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spd = B19200;
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else if (speed <= 38400 * MARGIN)
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spd = B38400;
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else if (speed <= 57600 * MARGIN)
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spd = B57600;
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else if (speed <= 115200 * MARGIN)
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spd = B115200;
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else
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#define check_speed(val) if (speed <= val) { spd = B##val; break; }
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speed = speed * 10 / 11;
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do {
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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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} while (0);
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cfsetispeed(&tty, spd);
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cfsetospeed(&tty, spd);
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