HI Marek,
On Mon, Jan 6, 2014 at 9:24 PM, Marek Vasut marex@denx.de wrote:
Thanks for reviewing this. :-)
On Monday, January 06, 2014 at 10:29:43 AM, Vivek Gautam wrote:
Update USB_MAX_CONTROLLER_COUNT to be '2' to enable support for both usb 3.0 controllers on exynos5420.
NOTE: To use EHCI on exynos5420, this change will need to be reverted, since there's only one EHCI controller available on exynos5420.
OK, this I seriously dislike. Hence a question ... my feeling is the XHCI and EHCI code for handling multiple controllers and multiple ports is almost the same. Can this code be adjusted to handle both EHCI and XHCI controllers indiscriminately ?
The controller count is actually used by the usb core (common/usb*) framework, right ? There's a need to add support for multiple controller types actually (so that EHCI and XHCI can be enabled simultaneously). Is that what you mean here ?
This would result in having CONFIG_USB_MAX_CONTROLLER_COUNT 3 on this board and being able to use both EHCI and XHCI . Would this be possible for you to implement please ? Thanks !
Ok, so you mean get all the controllers present on the board (EHCI and XHCI) setup. I think right now, the way USB core handles the controller count is quite different, so that 'CONFIG_USB_MAX_CONTROLLER_COUNT' helps in probing multiple controllers of the same type. I had plans to add support to use controllers of different types (EHCI and XHCI etc) simultaneously. But haven't really put a code for that yet. Can you suggest some pointers about how would you like to see EHCI and XHCI or even OHCI work together :-) I can take up this.
Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot