This adds support for the new USRP X420. It is the latest addition to
our X4xx series and comes with two HBX daughterboards. The HBX is
a one-channel direct conversion transceiver that covers 5G NR FR3 and
X-/KU-Band needs for Research and Prototyping in a frequency range of 10
MHz up to 20 GHz. It supports analog bandwidths of up to 1 GHz.
This commit is the MPM portion of the X420 support.
Co-authored-by: Martin Anderseck <martin.anderseck@emerson.com>
Co-authored-by: Ahmed Salman <ahmed.salman@emerson.com>
Co-authored-by: Max Köhler <max.koehler@emerson.com>
Co-authored-by: Markus Schill <markus.schill@emerson.com>
With this change, it is possible to have different sub-channels within
one channel to serve different purposes. For instance it is possible to
have one converter run in Real mode while two other converters serve I
and Q respectively. They all count as the same channel for UHD and the
driver software needs to take care to switch between them if required.
For the IQ architecture we also disable the NCO in the RFDC.
To follow Xilinx' recommendations for self-cal usage this adds
startup_tile() to the cal_mode selection and we query if the cal_mode
was set properly. Since we do this, on the host side we allow the full
first Nyquist zone to be used for self-cal.
