To reset a Canon EOS camera or Canon printer "ink counter" (often mistakenly referred to as "EFI software" in peer-to-peer forums), you typically use service tools like Tornado EOS Canon Service Tool (V6100)
Specialized software to fix Err70, Err80, and other firmware issues, as described on their Tornado EOS Key Tips for Success Never Turn Off the Camera during a firmware update Use a Fully Charged Battery: reset eos efi software download patched
What is EOS EFI Software?