Lenovo T61, USB fails to power on after resume

[Hans Petter Selasky]

On 06/03/14 20:28, Sean Bruno wrote:
> On Tue, 2014-06-03 at 18:58 +0200, Hans Petter Selasky wrote:
>> On 06/03/14 18:36, Sean Bruno wrote:
>>> On Tue, 2014-06-03 at 17:54 +0200, Hans Petter Selasky wrote:
>>>> On 06/03/14 16:56, Sean Bruno wrote:
>>>>> Noted that on resume, the USB ports on my T61 don't seem to be active.
>>>>>
>>>>> How should I go about debugging this?
>>>>>
>>>>> sean
>>>>
>>>> Hi,
>>>>
>>>> The USB stack performs the same EHCI/OHCI/UHCI/XHCI reset which is does
>>>> during power on, when it resumes. Ensure the ports are powered.  +5V.
>>>> Might be a BIOS/PCI/ACPI issue.
>>>>
>>>> --HPS
>>>>
>>>
>>>
>>> Is there something in the output of usbconfig that I can poke at to see
>>> if the hardware *thinks* it is powered on?
>>>
>>> sean
>>>
>>>
>>
>> Yes, there is the port status.
>>
>> struct usb_port_status {
>>           uWord   wPortStatus;
>> #define UPS_CURRENT_CONNECT_STATUS      0x0001
>> #define UPS_PORT_ENABLED                0x0002
>> #define UPS_SUSPEND                     0x0004
>> #define UPS_OVERCURRENT_INDICATOR       0x0008
>> #define UPS_RESET                       0x0010
>> #define UPS_PORT_L1                     0x0020  /* USB 2.0 only */
>> /* The link-state bits are valid for Super-Speed USB HUBs */
>> #define UPS_PORT_LINK_STATE_GET(x)      (((x) >> 5) & 0xF)
>> #define UPS_PORT_LINK_STATE_SET(x)      (((x) & 0xF) << 5)
>> #define UPS_PORT_LS_U0          0x00
>> #define UPS_PORT_LS_U1          0x01
>> #define UPS_PORT_LS_U2          0x02
>> #define UPS_PORT_LS_U3          0x03
>> #define UPS_PORT_LS_SS_DIS      0x04
>> #define UPS_PORT_LS_RX_DET      0x05
>> #define UPS_PORT_LS_SS_INA      0x06
>> #define UPS_PORT_LS_POLL        0x07
>> #define UPS_PORT_LS_RECOVER     0x08
>> #define UPS_PORT_LS_HOT_RST     0x09
>> #define UPS_PORT_LS_COMP_MODE   0x0A
>> #define UPS_PORT_LS_LOOPBACK    0x0B
>> #define UPS_PORT_LS_RESUME      0x0F
>> #define UPS_PORT_POWER                  0x0100
>> #define UPS_PORT_POWER_SS               0x0200  /* super-speed only */
>> #define UPS_LOW_SPEED                   0x0200
>> #define UPS_HIGH_SPEED                  0x0400
>> #define UPS_OTHER_SPEED                 0x0600  /* currently FreeBSD
>> specific */
>> #define UPS_PORT_TEST                   0x0800
>> #define UPS_PORT_INDICATOR              0x1000
>> #define UPS_PORT_MODE_DEVICE            0x8000  /* currently FreeBSD
>> specific */
>>           uWord   wPortChange;
>> #define UPS_C_CONNECT_STATUS            0x0001
>> #define UPS_C_PORT_ENABLED              0x0002
>> #define UPS_C_SUSPEND                   0x0004
>> #define UPS_C_OVERCURRENT_INDICATOR     0x0008
>> #define UPS_C_PORT_RESET                0x0010
>> #define UPS_C_PORT_L1                   0x0020  /* USB 2.0 only */
>> #define UPS_C_BH_PORT_RESET             0x0020  /* USB 3.0 only */
>> #define UPS_C_PORT_LINK_STATE           0x0040
>> #define UPS_C_PORT_CONFIG_ERROR         0x0080
>> } __packed;
>>
>> It is probed regularly by the UHUB driver and the port status is printed
>> in dmesg.
>>
>> Turn on like this:
>>
>> sysctl hw.usb.uhub.debug=16
>>
>> By resetting the root HUB, you can write new power on bits:
>>
>> usbconfig -d X.1 set_config 255
>> usbconfig -d X.1 set_config 0
>>
>> --HPS
>
> Well, that's problematic.  The USB tree looks like this normally:
>
> ugen0.1: <UHCI root HUB Intel> at usbus0, cfg=0 md=HOST spd=FULL
> (12Mbps) pwr=SAVE (0mA)
> ugen1.1: <UHCI root HUB Intel> at usbus1, cfg=0 md=HOST spd=FULL
> (12Mbps) pwr=SAVE (0mA)
> ugen2.1: <EHCI root HUB Intel> at usbus2, cfg=0 md=HOST spd=HIGH
> (480Mbps) pwr=SAVE (0mA)
> ugen3.1: <UHCI root HUB Intel> at usbus3, cfg=0 md=HOST spd=FULL
> (12Mbps) pwr=SAVE (0mA)
> ugen4.1: <UHCI root HUB Intel> at usbus4, cfg=0 md=HOST spd=FULL
> (12Mbps) pwr=SAVE (0mA)
> ugen5.1: <UHCI root HUB Intel> at usbus5, cfg=0 md=HOST spd=FULL
> (12Mbps) pwr=SAVE (0mA)
> ugen6.1: <EHCI root HUB Intel> at usbus6, cfg=0 md=HOST spd=HIGH
> (480Mbps) pwr=SAVE (0mA)
> ugen0.2: <Biometric Coprocessor STMicroelectronics> at usbus0, cfg=0
> md=HOST spd=FULL (12Mbps) pwr=ON (100mA)
>
>
> But, on resume ... sometimes ...  ugen0.1 is just flatout gone (along
> with the ugen0.2 device, obviously).  This only seems to happen with
> various USB device plugged in (tried about 4 different make/model usb
> sticks and ext drives).
>
> So, resetting doesn't work as the device is literally gone.  Thoughts?
>
> sean
>

Setting hw.usb.debug=15 should give you some hints. Are you sure the PCI 
device is still there after resume?

--HPS