Re: [PATCH v21 2/9] usb: dwc3: core: Access XHCI address space temporarily to read port info
From: Johan Hovold
Date: Mon Apr 22 2024 - 02:57:10 EST
On Sat, Apr 20, 2024 at 10:18:54AM +0530, Krishna Kurapati wrote:
> All DWC3 Multi Port controllers that exist today only support host mode.
> Temporarily map XHCI address space for host-only controllers and parse
> XHCI Extended Capabilities registers to read number of usb2 ports and
> usb3 ports present on multiport controller. Each USB Port is at least HS
> capable.
>
> The port info for usb2 and usb3 phy are identified as num_usb2_ports
> and num_usb3_ports and these are used as iterators for phy operations
> and for modifying GUSB2PHYCFG/ GUSB3PIPECTL registers accordingly.
>
> Signed-off-by: Krishna Kurapati <quic_kriskura@xxxxxxxxxxx>
> Reviewed-by: Bjorn Andersson <quic_bjorande@xxxxxxxxxxx>
Reviewed-by: Johan Hovold <johan+linaro@xxxxxxxxxx>