usbtmc_termchar  2002 drivers/usb/class/usbtmc.c 	struct usbtmc_termchar termc;
usbtmc_termchar    88 include/uapi/linux/usb/tmc.h #define USBTMC_IOCTL_CONFIG_TERMCHAR	_IOW(USBTMC_IOC_NR, 12, struct usbtmc_termchar)