Module upgrade 

Installing firmware by the route the card supports: upload the whole image into SDRAM, then ask the card to erase and program itself.

Direct writes to the program area are silently ignored, so this is the only path.

Functions

describe

Ask the card what image it expects and how it can be upgraded.

info

Print what the card reports.

install

Install a firmware image through SDRAM staging and wait for the card to report done. image is a manifest name or a path (crate::firmware).