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?



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.


Is there something in the output of usbconfig that I can poke at to see
if the hardware *thinks* it is powered on?


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_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


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?


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


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