I'm going to try my hand at writing an SD/MMC bus driver for eCos and contribute it. This will be the first real driver I've written for eCos and I'd like some pointers. I've looked at a few drivers in Linux and just code flows for the card initialization sequence and so forth. For a single SD/MMC controller on a chip, there can be multiple cards attached to the bus, and for a single chip, there can be multiple SD/MMC controllers. I am not quite sure how to represent this in the CDL and then the corresponding driver. I was thinking of defining a host driver and then having a CDL integer number for the number of SD/MMC controllers supported by the chip. Then, I was trying to figure out a way to tell the disk bus driver which of those controllers to check for cards.
My other thought is to start out more simple and support a single controller on the chip and a single card attached to that controller, then it could be expanded from there. Any thoughts from the community? Thanks, slide -- slide-o-blog http://slide-o-blog.blogspot.com/ -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
