FCC authentication with QMI over MBIM; try 1 -- Logs

[Bjørn Mork]

Bjørn Mork <bjorn at mork.no> writes:

> But I still cannot get more than ~130 Mbps dl, which is annoying. 
> I certainly hope that isn't a driver issue.

This is strange.  I blindly assumed the EM7455 would do superspeed, but
it doesn't.  So nothing's changed compared to the MC7455 tests.
"lsusb -vd 1199:9079" shows this BOS:

Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength           12
  bNumDeviceCaps          1
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000000
      (Missing must-be-set LPM bit!)
Device Status:     0x0000
  (Bus Powered)


Compare that to one from an MC7455 (while connected to an EHCI
controller):

Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength           22
  bNumDeviceCaps          2
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000002
      Link Power Management (LPM) Supported
  SuperSpeed USB Device Capability:
    bLength                10
    bDescriptorType        16
    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x000f
      Device can operate at Low Speed (1Mbps)
      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           1 micro seconds
    bU2DevExitLat         500 micro seconds
Device Status:     0x0000
  (Bus Powered)


How come?  Have I just imagined the SS support of the EM7455?  Or is
there something wrong somewhere?  The missing LPM bit in the EM7455
might indicate that there's a problem with the BOS.

Do you all have the same weird looking BOS on your EM7455s?


Bjørn