The
tcom driver provides support for the Byte Runner Technologies TC-400 and TC-800 series boards that multiplex together up to four or eight EIA RS-232C (CCITT V.28) communications interfaces.
Each
tcom device is the master device for up to eight
com devices. The kernel configuration specifies these
com devices as slave devices of the
tcom device, as shown in the synopsis. The slave ID given for each
com device determines which bit in the interrupt multiplexing register is tested to find interrupts for that device. The port specification for the
tcom device is used to compute the base addresses for the
com subdevices and the port for the interrupt multiplexing register.
Not all possible configuration options are currently supported (for example, speeds beyond 115200 baud are not currently supported).