tag	line	file	source code
PORT_UNKNOWN	29	kernel/chr_drv/serial.c	{ PORT_UNKNOWN, 0, 0x3F8, 4, NULL},
PORT_UNKNOWN	30	kernel/chr_drv/serial.c	{ PORT_UNKNOWN, 1, 0x2F8, 3, NULL},
PORT_UNKNOWN	31	kernel/chr_drv/serial.c	{ PORT_UNKNOWN, 2, 0x3E8, 4, NULL},
PORT_UNKNOWN	32	kernel/chr_drv/serial.c	{ PORT_UNKNOWN, 3, 0x2E8, 3, NULL},
PORT_UNKNOWN	245	kernel/chr_drv/serial.c	info->type = PORT_UNKNOWN;
PORT_UNKNOWN	263	kernel/chr_drv/serial.c	info->type = PORT_UNKNOWN;
PORT_UNKNOWN	473	kernel/chr_drv/serial.c	if (info->type == PORT_UNKNOWN)