Re: PROBLEM: DWC3 USB 3.0 not working on Odroid-XU4 with Exynos 5422

From: Vivek Gautam
Date: Wed Oct 05 2016 - 00:45:55 EST


Hi Anand,


On Tue, Oct 4, 2016 at 8:39 PM, Anand Moon <linux.amoon@xxxxxxxxx> wrote:
> Hi Vivek,
>

[snip]

>
> What I feel is that their need to be some reset of usb phy so that
> device are assigned to respective bus ports.

The phy resets are what we do in the phy-exynos5-usbdrd driver. In
addition to what we
have currently in this phy driver, we just need the phy calibration
patch [1] for phy configurations.

[1] https://lkml.org/lkml/2015/2/2/259

> odroid@odroid:~$ lsusb -t
> /: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
> /: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
> |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=r8152, 480M

This shows the ethernet device gets detected on the high-speed port of one
of the controller.
The lsusb output for kernel v4.7.x posted by Michael show that the
ethernet device got detected on super-speed port of the controller.
So, there seems to be a difference between the two.
Or, is this how it is behaving ?

Is this lsusb output on 4.8 kernel with the patch [1] ?

> /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 5000M
> |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/2p, 5000M
> |__ Port 1: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
> |__ Port 2: Dev 4, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
> /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci-hcd/1p, 480M
> |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/2p, 480M
> /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=exynos-ohci/3p, 12M
> /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=exynos-ehci/3p, 480M
> |__ Port 1: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 480M
>
>
> Bus 06.Port should register the Realtek Ethernet r8153 device.
> But I am not able to trace out how it's should happen.

If i understand, below is how the configuration looks like on the board?

+-----------------------+
+------>| |
| | Bus 6 |-------+
+-----------+ | (super-speed) | |
| | +-----------------------+ |
|Controller | | --------> Ethernet device
| 2 | |
| | +-----------------------+ |
+-----------+ | | |
| | Bus 5 |-------+
+------>| (high-speed) |
+-----------------------+


+-----------------------+
+------>| |
| | Bus 4 |-------+
+-----------+ | (super-speed) | |
| | +-----------------------+ |
|Controller | | --------> (On board
hub ?? _OR_ external hub with downstream devices) ???
| 1 | |
| | +-----------------------+ |
+-----------+ | | |
| | Bus 3 |-------+
+------>| (high-speed) |
+-----------------------+


Thanks
Vivek


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