How to force USB 3.0 port controller to work in USB 2.0 mode [combo hub]?

[RShan]

Hi,

I am using Intel chip Denverton [Intel(R) Atom(TM) CPU C3758 @ 2.20GHz] running in Wind River Linux 7.0.0.2.

It can recognize USB 3.0 storage device correctly and I want to force this device to work in USB 2.0 mode ,i.e. USB 2.0 root hub at run time. How I can do this ?,Is it possible ?

USB information is given below,&# 8232;

[host:~]$ lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 007: ID 0781:5581 SanDisk Corp.

Bus 002 Device 006: ID 0781:5581 SanDisk Corp.

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

[host:~]$ lsusb -t

/: Bus 02.Port 1: Dev 1, class="root_hub", Driver=xhci_hcd/4p, 5000M

|__ Port 2: Dev 2, If 0, class="Mass" Storage, Driver=usb-storage, 5000M

|__ Port 3: Dev 3, If 0, class="Mass" Storage, Driver=usb-storage, 5000M

/: Bus 01.Port 1: Dev 1, class="root_hub", Driver=xhci_hcd/4p, 480M

[host:~]$

[host:~]$ lspci -nn | grep USB

00:15.0 USB controller [0c03]: Intel Corporation Device [8086:19d0] (rev 11)

[host:~]$

[idata]

Thanks for contacting the Intel support. According with you question seems that the Intel® Rapid Storage Technology enterprise (Intel® RSTe) is not the product you are having issues with . In order to route this to the correct department can you please respond the following :

what is the mother board information brand and model ?Regards,

[RShan]

Denverton [Intel(R) Atom(TM) CPU C3758 @ 2.20GHz] CPU.

[host:~]$ cat /proc/cpuinfo

processor : 0

vendor_id : GenuineIntel

cpu family : 6

model : 95

model name : Intel(R) Atom(TM) CPU C3758 @ 2.20GHz

stepping : 1

microcode : 0x1c

cpu MHz : 2200.000

cache size : 2048 KB

physical id : 0

siblings : 8

core id : 0

cpu cores : 8

apicid : 0

initial apicid : 0

fpu : yes

fpu_exception : yes

cpuid level : 21

wp : yes

[idata]

Hi the information Denverton [Intel(R) Atom(TM) CPU C3758 @ 2.20GHz] CPU , is not related with the mother board information , in linux please use the following command in order to get that information: $ sudo dmidecode --string baseboard-product-name .

Please respond with the result you get .Regards,