Hi All, I'd like to see USB host support upstream for i.MX SoCs. I have some problems integrating this properly into the kernel, so I just attached my current series asking you in which direction I should travel with the patches. The hardware is a OTG controller which has one OTG port and one host-only port. The host ports are ehci compatible, device support is already mainline in the fsl_usb2_udc driver. The problems begin when it comes to the isp1504 ulpi transceiver. I have two of them on my board which I have to configure for host mode. Currently the Kernel seems to support only one single OTG transceiver. Adding a second one would mean to add some infrastructure to assiociate a controller and a transceiver. Another problem is that the host and the device controller share the same register space, currently both drivers do a request_mem_region and thus can't be loaded simultaneously for otg support. The last thing is that the access to the isp1504 seems to be quite architecture specific. It is accessed through the ULPI_VIEW register which is also in the same register space. I think I'll need an abstraction from the isp1504 driver and the register accesses. As all this means quite some work I'd like to hear your opinions before working further on this. Thanks, Sascha -- 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
