TUSB8041: Unable to enumerate USB device on Linux ARM

5V_USB is supplied by an external board and is ok, if I try to plug any device to the USB 3.0 and 2.0 nothing gets detected and no messages from Linux kernel at all.

Here the result of "lsusb -v":

Bus 002 Device 002: ID 0451:8140 Texas Instruments, Inc. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.10
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         3 
  bMaxPacketSize0         9
  idVendor           0x0451 Texas Instruments, Inc.
  idProduct          0x8140 
  bcdDevice            2.00
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           31
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 Full speed (or root) hub
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes           19
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Feedback
        wMaxPacketSize     0x0002  1x 2 bytes
        bInterval               8
        bMaxBurst               0
Hub Descriptor:
  bLength               1
  bDescriptorType       4
  nNbrPorts            16
  wHubCharacteristic 0x0140
    Ganged power switching
    Ganged overcurrent protection
  bPwrOn2PwrGood        4 * 2 milli seconds
  bHubContrCurrent     64 milli Ampere
  bHubDecLat          0.64 micro seconds
  wHubDelay            96 nano seconds
  DeviceRemovable    0x00 0x00 0x00
 Hub Port Status:
   Port 1: 0000.06a0 highspeed lowspeed
   Port 2: 0000.06a0 highspeed lowspeed
   Port 3: 0000.06a0 highspeed lowspeed
   Port 4: 0000.06a0 highspeed lowspeed
   Port 5: 0000.06a0 highspeed lowspeed
   Port 6: 0000.06a0 highspeed lowspeed
   Port 7: 0000.06a0 highspeed lowspeed
   Port 8: 0000.06a0 highspeed lowspeed
   Port 9: 0000.06a0 highspeed lowspeed
   Port 10: 0000.06a0 highspeed lowspeed
   Port 11: 0000.06a0 highspeed lowspeed
   Port 12: 0000.06a0 highspeed lowspeed
   Port 13: 0000.06a0 highspeed lowspeed
   Port 14: 0000.06a0 highspeed lowspeed
   Port 15: 0000.06a0 highspeed lowspeed
   Port 16: 0000.06a0 highspeed lowspeed
Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength           42
  bNumDeviceCaps          3
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000006
      Link Power Management (LPM) Supported
  SuperSpeed USB Device Capability:
    bLength                10
    bDescriptorType        16
    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x000e
      Device can operate at Full Speed (12Mbps)
      Device can operate at High Speed (480Mbps)
      Device can operate at SuperSpeed (5Gbps)
    bFunctionalitySupport   1
      Lowest fully-functional device speed is Full Speed (12Mbps)
    bU1DevExitLat          10 micro seconds
    bU2DevExitLat        2047 micro seconds
  Container ID Device Capability:
    bLength                20
    bDescriptorType        16
    bDevCapabilityType      4
    bReserved               0
    ContainerID             {008014d5-854c-b9c1-0319-8fc2b6c9d000}
Device Status:     0x000d
  Self Powered
  U1 Enabled
  U2 Enabled

Hi Riccardo:

   I will check schematic  and by the same time, can you debug issue based on following procedure?

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1343233/faq-tusb8041a-debug-procedure-if-ti-tusb80xx-or-tusb40xx-hub-can-not-be-detected-by-usb-host

Regards

Brian

Hi Brian, did you had the chance to take a look at the schematic? Regarding the power sequence, is it important to power VDD33 before Vdd even if we toggle the GRSTz pin after 10 seconds?

Regards

Hi Riccardo:

       It's ok to power VDD33 before Vdd even if we toggle the GRSTz pin after 10 seconds, but GRSTz pulse should be >3ms.

      I checked schematic , upstream should be detected.

  for down stream , did you connect DP/DM correct? normally pin 2 is D- 

 From your test log, [   54.333466] usb 2-1: New USB device found, idVendor=0451, idProduct=8140, bcdDevice= 2.00 

  it looks USB3 hub is detected, what device you connected on downstream port?

Regards

brian

Hi Brian,

about the DP/DM yes we are aware it is not a standard pinout, we made the connection accordingly. We tested plugging USB flash drive, USB wifi dongle and a USB modem, no signals at all from downstream port.

The device is detected but "unable to enumerate USB device" is the last log and no device attached is been detected from linux.

I checked the link you sent and it seems the crystal is not oscillating, we checked the component and it is mounted well. 

Actually the VDD is stable before the VDD33 but at that time the GRSTz is low. we set GRSTz to high after about 10 seconds from powering on the board.

After  1.1v and 3.3v are stable , hold GRSTz low >3ms should be good enough.

Something looks wrong if crystal is not oscillating, how is the soldering of ground pad?

Regards

Brian

Hi Riccardo::

   Any update?

Regards

Brian