Hi Felipe, We've gone through remaining work items for getting the ARM kernel to full multiplatform support again, and MUSB came up. I'm sure you have your own thoughts on this, but I'd like to know if there is already a plan in place. >From what I can see, the driver in PIO mode should almost work on multiple platforms, but there are a couple of compile-time dependencies in it that need to be turned into run-time conditionals. In particular the TUSB version seem sufficiently different that it needs some extra work to be a true run-time option. The DMA support as far as I can tell has never been intended to be usable in a multiplatform setup, but that also seems doable. Looking just at the #ifdef statements in the driver, I found that the following things need to be addressed: * abstract musb_write_fifo and musb_read_fifo into callbacks * move fifo_mode setting into glue driver for runtime selection * turn TUSB compile-time switches into run-time conditionals * turn musb_ep_select into run-time switch * make is_dma_capable/is_cppi_enabled/tusb_dma_omap run-time conditionals * abtract dma_controller_create/destroy interface Aside from this, a recent discussion with Maxime has brought up that the Allwinner A1x platform (mach-sunxi) contains an MUSB variant that is currently used with an independently implemented device driver, see https://github.com/linux-sunxi/linux-sunxi/tree/sunxi-3.0/drivers/usb/sun5i_usb I wonder if you have any insight on how that can be integrated into musb, or whether it is likely to be a compatible version to start with. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
