amd64packages are included too. This link is likely to break when the software is upgraded, you should try your luck in the drivers search page should that happen (or for other models). After installing that, CUPS find the connected printer and proposes the PPD for it. The scanner works out of the box with xsane
As a side note, Canon also provides
source for the debian packages (the packaged was ITPed ages ago). However, there are some binary-only blobs and I didn't manage to get it to compile from source.