Hello,
I would like to post a problem I am encountering regarding Uboot 1.1.3 and USB.
My processor is an AMD 1550. In short I am seeing the following error when I execute
The "usb start" command. I also noticed that a CTL:Timeout occurs. It appears the Uboot
can see the device, but for some reason the device does not respond to requests.
I have browsed through Some mail threads from other folks encountering the same issue, and the resolution for them resulted
In an upgrade to Uboot 1.1.4. I would like to know if anyone has worked around / fixed such an issue
without upgrading U-Boot.
DEBUG: RET(ctlr) URB:[ 0] dev: 0,ep: 0-I,type:CTRL,len:0/8 stat:0x20
DEBUG: usb_new_device() usb_get_descriptor RETURN err: ffffffff, act_len/status;
8/20
DEBUG: usb_new_device() device_descriptor: 00 00 00 00 00 00 00 08
USB device not responding, giving up (status=20)
------------------------------------------------------ ENTIRE DEBUG OUTPUT ----------------------------------------
BOOT>usb start
(Re)start USB...
USB: INFO: aligned ghcca afffe800
DEBUG: USB HC reset_hc usb-au1550: ctrl = 0x0 ;
DEBUG: OHCI controller usb-au1550 state
DEBUG: control: 0x0000008f HCFS=operational IE PLE CBSR=3
DEBUG: cmdstatus: 0x00000000 SOC=0
DEBUG: intrstatus: 0x00000004 SF
DEBUG: intrenable: 0x00000053 RHSC UE WDH SO
DEBUG: hcca frame #0000
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
scanning bus for devices... New Device 0
usb_control_msg: request: 0x6, requesttype: 0x80
value 0x100 index 0x0 length 0x8
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 0,ep: 0-I,type:CTRL,len:0/8 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 0,ep: 0-I,type:CTRL,len:0/8 stat:0x80000000
INFO: Root-Hub: adr: 0 cmd(8): 00000680 0100 0000 0008
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 0,ep: 0-I,type:CTRL,len:8/8 stat:0x0
DEBUG: usb_new_device() usb_get_descriptor RETURN err: 8, act_len/status; 8/0
DEBUG: usb_new_device() device_descriptor: 12 01 10 01 09 00 00 08
set address 1
usb_control_msg: request: 0x5, requesttype: 0x0
value 0x1 index 0x0 length 0x0
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 0,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 0,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000500 0001 0000 0000
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 0,ep: 0-O,type:CTRL,len:0/0 stat:0x0
usb_control_msg: request: 0x6, requesttype: 0x80
value 0x100 index 0x0 length 0x12
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/18 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/18 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000680 0100 0000 0012
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:18/18 stat:0x0
DEBUG: usb_new_device() device_descriptor: 12 01 10 01 09 00 00 08 00 00 00 00 00 00 00 01 00 01
usb_control_msg: request: 0x6, requesttype: 0x80
value 0x200 index 0x0 length 0x8
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/8 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/8 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000680 0200 0000 0008
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:8/8 stat:0x0
usb_control_msg: request: 0x6, requesttype: 0x80
value 0x200 index 0x0 length 0x19
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/25 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/25 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000680 0200 0000 0019
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:25/25 stat:0x0
get_conf_no 0 Result 25, wLength 25
if 0, ep 0
##EP epmaxpacketin[1] = 2
set configuration 1
usb_control_msg: request: 0x9, requesttype: 0x0
value 0x1 index 0x0 length 0x0
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000900 0001 0000 0000
INFO: WR:status 0x10000
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x0
new device strings: Mfr=0, Product=1, SerialNumber=0
usb_control_msg: request: 0x6, requesttype: 0x80
value 0x300 index 0x0 length 0xFF
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/255 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/255 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000680 0300 0000 00ff
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:255/255 stat:0x0
USB device number 1 default language ID 0x409
usb_control_msg: request: 0x6, requesttype: 0x80
value 0x301 index 0x409 length 0xFF
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/255 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/255 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000680 0301 0409 00ff
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:255/255 stat:0x0
Manufacturer
Product OHCI Root Hub
SerialNumber
usb_control_msg: request: 0x6, requesttype: 0xA0
value 0x2900 index 0x0 length 0x4
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 000006a0 2900 0000 0004
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:4/4 stat:0x0
usb_control_msg: request: 0x6, requesttype: 0xA0
value 0x2900 index 0x0 length 0x9
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/9 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/9 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 000006a0 2900 0000 0009
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:9/9 stat:0x0
usb_control_msg: request: 0x0, requesttype: 0xA0
value 0x0 index 0x0 length 0x4
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 000000a0 0000 0000 0004
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:4/4 stat:0x0
usb_control_msg: request: 0x3, requesttype: 0x23
value 0x8 index 0x1 length 0x0
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000323 0008 0001 0000
INFO: WR:portstatus[0] 0x100
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x0
usb_control_msg: request: 0x3, requesttype: 0x23
value 0x8 index 0x2 length 0x0
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000323 0008 0002 0000
INFO: WR:portstatus[1] 0x100
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x0
usb_control_msg: request: 0x0, requesttype: 0xA3
value 0x0 index 0x1 length 0x4
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 000000a3 0000 0001 0004
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:4/4 stat:0x0
usb_control_msg: request: 0x0, requesttype: 0xA3
value 0x0 index 0x1 length 0x4
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 000000a3 0000 0001 0004
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00010101 CSC PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:4/4 stat:0x0
usb_control_msg: request: 0x1, requesttype: 0x23
value 0x10 index 0x1 length 0x0
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000123 0010 0001 0000
INFO: WR:portstatus[0] 0x10000
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00000101 PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x0
usb_control_msg: request: 0x3, requesttype: 0x23
value 0x4 index 0x1 length 0x0
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000323 0004 0001 0000
INFO: WR:portstatus[0] 0x10
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x0
usb_control_msg: request: 0x0, requesttype: 0xA3
value 0x0 index 0x1 length 0x4
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 000000a3 0000 0001 0004
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00100103 PRSC PPS PES CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:4/4 stat:0x0
usb_control_msg: request: 0x1, requesttype: 0x23
value 0x14 index 0x1 length 0x0
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000123 0014 0001 0000
INFO: WR:portstatus[0] 0x100000
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00000103 PPS PES CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x0
New Device 1
usb_control_msg: request: 0x6, requesttype: 0x80
value 0x100 index 0x0 length 0x8
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 0,ep: 0-I,type:CTRL,len:0/8 stat:0x80000000
DEBUG: SUB URB:[ 0] dev: 0,ep: 0-I,type:CTRL,len:0/8 stat:0x80000000
DEBUG: %
DEBUG: hc_interrupt: returning..
DEBUG: %
DEBUG: hc_interrupt: returning..
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DEBUG: hc_interrupt: returning..
DEBUG: %
DEBUG: USB Schedule overrun
DEBUG: RET(ctlr) URB:[ 0] dev: 0,ep: 0-I,type:CTRL,len:0/8 stat:0x20
DEBUG: usb_new_device() usb_get_descriptor RETURN err: ffffffff, act_len/status;
8/20
DEBUG: usb_new_device() device_descriptor: 00 00 00 00 00 00 00 08
USB device not responding, giving up (status=20)
usb_control_msg: request: 0x1, requesttype: 0x23
value 0x1 index 0x1 length 0x0
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 00000123 0001 0001 0000
INFO: WR:portstatus[0] 0x1
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00000101 PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-O,type:CTRL,len:0/0 stat:0x0
usb_control_msg: request: 0x0, requesttype: 0xA3
value 0x0 index 0x2 length 0x4
INFO: submit_control_msg
DEBUG: SUB URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
DEBUG: SUB(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:0/4 stat:0x80000000
INFO: Root-Hub: adr: 1 cmd(8): 000000a3 0000 0002 0004
DEBUG: roothub.a: 02001202 POTPGT=2 NOCP NPS NDP=2
DEBUG: roothub.b: 00000000 PPCM=0000 DR=0000
DEBUG: roothub.status: 00000000
DEBUG: roothub.portstatus [0] = 0x00000101 PPS CCS
DEBUG: roothub.portstatus [1] = 0x00000100 PPS
DEBUG: RET(rh) URB:[ 0] dev: 1,ep: 0-I,type:CTRL,len:4/4 stat:0x0
2 USB Device(s) found
scanning bus for storage devices... i=0
i=1
i=2
0 Storage Device(s) found
BOOT>usb tree
Device Tree:
1 Hub (12MBit/s, 0mA)
| OHCI Root Hub
|
+-0 See Interface (12MBit/s, 0mA)