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$ dmesg
[17987.272001
] ci_hdrc ci_hdrc.0: EHCI Host Controller
[17987.272044
] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
[17987.272089
] ci_hdrc ci_hdrc.0: reset hcs_params 0x10011
dbg=0 ind
cc=0
pcc=0 ordered
ports=1
[17987.272105
] ci_hdrc ci_hdrc.0: reset hcc_params 0006 thresh 0 uframes 256/512/1024 park
[17987.272199
] ci_hdrc ci_hdrc.0: park 0
[17987.272223
] ci_hdrc ci_hdrc.0: reset
command 0080002
(park
)=0
ithresh=8
period=1024 Reset HALT
[17987.272249
] ci_hdrc ci_hdrc.0: init
command 0010005
(park
)=0
ithresh=1
period=512 RUN
[17987.291471
] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[17987.291694
] usb usb1: default language 0x0409
[17987.291769
] usb usb1: udev 1, busnum 1,
minor = 0
[17987.291785
] usb usb1: New USB device found,
idVendor=1d6b,
idProduct=0002
[17987.291797
] usb usb1: New USB device strings:
Mfr=3,
Product=2,
SerialNumber=1
[17987.291808
] usb usb1: Product: EHCI Host Controller
[17987.291818
] usb usb1: Manufacturer: Linux 3.12.13-dev ehci_hcd
[17987.291828
] usb usb1: SerialNumber: ci_hdrc.0
[17987.292845
] usb usb1: usb_probe_device
[17987.292871
] usb usb1: configuration
#1 chosen from 1 choice
[17987.292955
] usb usb1: adding 1-0:1.0
(config
#1, interface 0)
[17987.302909
] hub 1-0:1.0: usb_probe_interface
[17987.302937
] hub 1-0:1.0: usb_probe_interface - got id
[17987.302961
] hub 1-0:1.0: USB hub found
[17987.303043
] hub 1-0:1.0: 1 port detected
[17987.303056
] hub 1-0:1.0: standalone hub
[17987.303068
] hub 1-0:1.0: individual port power switching
[17987.303078
] hub 1-0:1.0: individual port over-current protection
[17987.303088
] hub 1-0:1.0: Single TT
[17987.303099
] hub 1-0:1.0: TT requires at most 8 FS bit
times (666 ns
)[17987.303110
] hub 1-0:1.0: power on to power good
time: 20ms
[17987.303162
] hub 1-0:1.0:
local power
source is good
[17987.303277
] hub 1-0:1.0: enabling power on all ports
[17987.401492
] ci_hdrc ci_hdrc.0: GetStatus port:1 status 001803 0 ACK POWER
sig=j CSC CONNECT
[17987.401563
] hub 1-0:1.0: port 1: status 0101 change 0001
[17987.501489
] hub 1-0:1.0: state 7 ports 1 chg 0002 evt 0000
[17987.501572
] hub 1-0:1.0: port 1, status 0101, change 0000, 12 Mb/s
[17987.561468
] ci_hdrc ci_hdrc.0: GetStatus port:1 status c00100a 6 ACK POWER
sig=se0 PEC CSC
[17987.561590
] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002
[17987.561615
] ci_hdrc ci_hdrc.0: GetStatus port:1 status c00100a 6 ACK POWER
sig=se0 PEC CSC
[17987.561674
] hub 1-0:1.0: port 1, status 0100, change 0003, 12 Mb/s
[17987.721456
] hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x100
[17987.721505
] hub 1-0:1.0: hub_suspend
[17987.721553
] usb usb1: bus auto-suspend, wakeup 1
[17987.721565
] ci_hdrc ci_hdrc.0:
suspend root hub
[17988.351026
] usb usb1: usb wakeup-resume
[17988.351049
] usb usb1: usb auto-resume
[17988.351062
] ci_hdrc ci_hdrc.0: resume root hub
[17988.351084
] hub 1-0:1.0: hub_resume
[17988.351118
] ci_hdrc ci_hdrc.0: GetStatus port:1 status 001803 0 ACK POWER
sig=j CSC CONNECT
[17988.351157
] hub 1-0:1.0: port 1: status 0101 change 0001
[17988.451485
] hub 1-0:1.0: state 7 ports 1 chg 0002 evt 0000
[17988.451549
] hub 1-0:1.0: port 1, status 0101, change 0000, 12 Mb/s
[17988.511473
] ci_hdrc ci_hdrc.0: GetStatus port:1 status c00100a 6 ACK POWER
sig=se0 PEC CSC
[17988.511585
] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002
[17988.511610
] ci_hdrc ci_hdrc.0: GetStatus port:1 status c00100a 6 ACK POWER
sig=se0 PEC CSC
[17988.511668
] hub 1-0:1.0: port 1, status 0100, change 0003, 12 Mb/s
[17988.671457
] hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x100
[17988.671497
] hub 1-0:1.0: hub_suspend
[17988.671537
] usb usb1: bus auto-suspend, wakeup 1
[17988.671549
] ci_hdrc ci_hdrc.0:
suspend root hub
[17989.384026
] usb usb1: usb wakeup-resume
[17989.384046
] usb usb1: usb auto-resume
[17989.384060
] ci_hdrc ci_hdrc.0: resume root hub
[17989.384079
] hub 1-0:1.0: hub_resume
[17989.384110
] ci_hdrc ci_hdrc.0: GetStatus port:1 status 001803 0 ACK POWER
sig=j CSC CONNECT
[17989.384152
] hub 1-0:1.0: port 1: status 0101 change 0001
[17989.491466
] hub 1-0:1.0: state 7 ports 1 chg 0002 evt 0000
[17989.491520
] hub 1-0:1.0: port 1, status 0101, change 0000, 12 Mb/s
[17989.551443
] ci_hdrc ci_hdrc.0: port 1 reset
complete, port enabled
[17989.551469
] ci_hdrc ci_hdrc.0: GetStatus port:1 status 001805 0 ACK POWER
sig=j PE CONNECT
[17989.611479
] usb 1-1: new full-speed USB device number 4 using ci_hdrc
[17989.671445
] ci_hdrc ci_hdrc.0: port 1 reset
complete, port enabled
[17989.671469
] ci_hdrc ci_hdrc.0: GetStatus port:1 status 001805 0 ACK POWER
sig=j PE CONNECT
[17989.766271
] usb 1-1: default language 0x0409
[17989.769271
] usb 1-1: device v10c4 pea60 is not supported
[17989.769285
] usb 1-1: udev 4, busnum 1,
minor = 3
[17989.769297
] usb 1-1: New USB device found,
idVendor=10c4,
idProduct=ea60
[17989.769309
] usb 1-1: New USB device strings:
Mfr=1,
Product=2,
SerialNumber=3
[17989.769319
] usb 1-1: Product: CP2102 USB to UART Bridge Controller
[17989.769330
] usb 1-1: Manufacturer: Silicon Labs
[17989.769339
] usb 1-1: SerialNumber: 0001
[17989.770239
] usb 1-1: usb_probe_device
[17989.770297
] usb 1-1: configuration
#1 chosen from 1 choice
[17989.771322
] usb 1-1: adding 1-1:1.0
(config
#1, interface 0)
[17989.782199
] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002