I am happy to announce that SDIO support will soon be a standard feature in Linux. No more proprietary stacks with all the troubles (legal and technical) that go with them.
The new code is written from scratch by yours truly and Nicolas Pitre. There were several stacks out there that were recently made available under the GPL, but none of them were in any shape to be merged into the kernel. Current status is that basic functionality is in place. There is a driver model (with device matching and module auto-loading) and functions for easy register access. It is also possible to receive interrupts from the card. There is only one driver in the tree right now (for the standard GPS interface), but it should be complete enough for everyone to see how the API works. The pieces still missing are mostly performance related: - No clock speed change. - No wide bus support - Interrupts are polled - No support for combo (mem+IO) cards The last point is unlikely to change as neither Nicolas nor I currently possess such a card. As usual, patches/hardware is welcome. So what we'd like to see now is extensive testing. Try the stack out on every MMC controller you can find and review as much of the code as possible. With some luck, we'll be able to get this ready in time for the next merge window. You can find the code in -mm and as just the SDIO stuff on top of Linus' tree: git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc.git#sdio (PS. I've posted this both to LKML and LAKML. Interested readers should probably check both lists for replies) Rgds -- -- Pierre Ossman Linux kernel, MMC maintainer http://www.kernel.org PulseAudio, core developer http://pulseaudio.org rdesktop, core developer http://www.rdesktop.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/