Date: Tue, 03 Jun 2014 18:58:16 +0200 From: Hans Petter Selasky <hps@selasky.org> To: sbruno@freebsd.org Cc: freebsd-usb@freebsd.org Subject: Re: Lenovo T61, USB fails to power on after resume Message-ID: <538DFEA8.3090607@selasky.org> In-Reply-To: <1401813374.1114.0.camel@bruno> References: <1401807398.96874.3.camel@bruno> <538DEFD3.2010406@selasky.org> <1401813374.1114.0.camel@bruno>
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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
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