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serial: Support additional serial speed values

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* 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>
This commit is contained in:
Stefan Weil 2009-10-26 16:10:10 +01:00 committed by Anthony Liguori
parent 66a6593a8c
commit 45eea13b24
1 changed files with 61 additions and 26 deletions
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87
qemu-char.c
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@ -1007,33 +1007,68 @@ static void tty_serial_init(int fd, int speed,
#endif
tcgetattr (fd, &tty);
#define MARGIN 1.1
if (speed <= 50 * MARGIN)
spd = B50;
else if (speed <= 75 * MARGIN)
spd = B75;
else if (speed <= 300 * MARGIN)
spd = B300;
else if (speed <= 600 * MARGIN)
spd = B600;
else if (speed <= 1200 * MARGIN)
spd = B1200;
else if (speed <= 2400 * MARGIN)
spd = B2400;
else if (speed <= 4800 * MARGIN)
spd = B4800;
else if (speed <= 9600 * MARGIN)
spd = B9600;
else if (speed <= 19200 * MARGIN)
spd = B19200;
else if (speed <= 38400 * MARGIN)
spd = B38400;
else if (speed <= 57600 * MARGIN)
spd = B57600;
else if (speed <= 115200 * MARGIN)
spd = B115200;
else
#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);