USB compliance testing

[jvog.sen]

Hi, and yet another question...

We would like to perform electrical compliance testing on our USB ports. This requires each port to send a test pattern.

Our board has one upstream and two downstream facing ports. The upstream port can be set into various test modes using a standard tool (USB xHSETT). Unfortunately, this is not possible for the downstream ports.

Can you give me any advice, how to set a usb host port into the TEST_PACKET test mode?

Regards

[Olivier GALLIEN · Accepted solution]

Hi @jvog.sen​ ,

If I got your question I guess you need to set CONFIG_USB_EHSET_TEST_FIXTURE in your kernel.

This configuration enables the ehset driver which is loaded when plugging PIDVID test fixture or USBHSET https://elixir.bootlin.com/linux/latest/source/drivers/usb/misc/ehset.c

which converts PID into USB message to put the controller in the requested test mode.

#define TEST_SE0_NAK_PID 0x0101

#define TEST_J_PID 0x0102

#define TEST_K_PID 0x0103

#define TEST_PACKET_PID 0x0104

#define TEST_HS_HOST_PORT_SUSPEND_RESUME 0x0106

#define TEST_SINGLE_STEP_GET_DEV_DESC 0x0107

#define TEST_SINGLE_STEP_SET_FEATURE 0x0108

Hope it help

Olivier

[jvog.sen]

Hi Olivier,

thanks, that sounds like it could work - I'll give it a shot!

Regards

Jan