66AK2H12 USB2.0 suspend/resume test

Hi,

In the linux kernel provided with MCSDK 3.1.3.6, testusb.c is given to test the interoperability of USB. Just give it a try.... I have not used it.Just a pointer for you.

Please refer the following links:

Please do check whether it can help for testing the suspend / resume feature.

Will get back for the rest of the questions.

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Hi, Shankari G

Thak you for your reply.

I tried your suggestions for USB suspend/resume test　on EVMK2H with MCSDK 3_01_03_06.
but, it can not be run well this method..

====
root@k2hk-evm:~# mount -t usbfs usbfs /proc/bus/usb
mount: mount point /proc/bus/usb does not exist
root@k2hk-evm:~#
root@k2hk-evm:~# ls -la /proc/bus/
total 0
dr-xr-xr-x 4 root root 0 Mar 27 04:54 .
dr-xr-xr-x 111 root root 0 Jan 1 1970 ..
dr-xr-xr-x 2 root root 0 Mar 27 04:54 input
dr-xr-xr-x 2 root root 0 Mar 27 04:54 pci
root@k2hk-evm:~# ./testusb -a
usbfs files are missing
====

Sorry i am a Linux beginner, could you tell me how to resolve this issue?

Best regards,
H.U

Hi, Shankari

Could you please update?

I believe that it is possible to meet our request as long as it can forced to put into Suspend state.
So, I want to know whether 66AK2H12 has such a register.

Best regards,
H.U

H.U.

You can set DevSpd bits to 0 in DCFG Register to set the full speed mode.

Thanks

David

Hi, David

The document has been described as follows.

Should we set DEVSPD bit to 1 for Full Speed?
or, does the document is wrong?

Best regards,
H.U

Hi, Shankari, David

Thank you for your reply.
We tested about your suggestions.

1. USB suspend / resume test:
USB suspend / resume test is OK, it was our desired result.

2. Force Full-speed configuration:
We set DCFG.DEVSPD to 1 after device initialization.
After set to 1 DEVSPD bit, we can always read 1 from the register regardless of the USB connection state.
but did not become a full-speed mode.

Do we need to configure other registers?

Best regards,
H.U

H.U.

Is the device being configured as a host or peripheral? You can only set the speed for host mode, but not the peripheral mode.

Thanks

David

Hi, David

We want to use force full-speed at USB2.0 xHCI mode.

Best regards,
H.U

H.U

But is 66AK2H12 being configured as a USB host or peripheral?

Thanks

David

Hi, David

We will configured the device as USB host, want to connect the HDD device or USB memory.

Best regards,
H.U

Hi, David

Could you please update this thread?
Please ask me anything if you need more information for your response.

Best regards,
H.U

H.U

Set DEVSPD to full speed will only work in host mode, what do they see when they set this bit to full speed mode? Do they see the high speed handshake fail? 

Thanks

David

Hi, David

>what do they see when they set this bit to full speed mode?

They were to measure the data transfer speed using oscilloscope.
The data rate was obviously high speed, and it was the same speed without depending on the setting of DEVSPD.

>Do they see the high speed handshake fail?

No, It is operating normally connected to HDD device at High-speed.

I have a fundamental question.
USB user guide(SPRUHJ7) is described as follows,

It seems that setting of DEVSPD determine the speed grade of the USB port of 66AK2H12 when using at device mode.
Is DCFG register only valid in device (peripheral) mode?

Best regards,
H.U

Hi, David

Thank you for your reply.
It is clear for me.
My customer will try using the FS device for FS mode.

Best regards,
H.U