properly set the data rate
preliminary tx power setting, uncalibrated
TX_NCO_MODE definitions
support for CW modulation (module behave as a signal generator)

Reformat some code

reorganize debug comments
cleanup pending status at boot

implement get_chip_status and use it to detect command errors

add fifo read and write commands
add comments, add a function to set a single byte property
add bits for global config property and fast response register options

Also reformat some long lines.

also fix upper half ioctl

add comments

restore the upper half behaviour waiting on a semaphore after write, adapt cc1101 to keep it working