Linux/AM3358: USB hub is not resuming

Titus Stalin

Part Number: AM3358

Tool/software: Linux

Hello Experts,

I've connected the USB HUB to USB1 port of AM3358 custom board and Hub is not resuming. My custom board is based on AM335x TI EVM board.

In linux log, I can see the below prints, means that my HUB is not resuming ?

<7>[    1.520374] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0000
<7>[    1.520417] hub 1-0:1.0: hub_suspend
<7>[    1.520441] usb usb1: bus auto-suspend, wakeup 1

I think, the below print should come , right ?

hub 1-0:1.0: state 7 ports 1 chg 0002 evt 0000

<7>[ 2.286068] hub 1-0:1.0: port 1, status 0101, change 0000, 12 Mb/s

I have also tried to connect USB HUB (same part no USB2514B) to USB1 port externally on the TI EVM board, it worked.

Edited:

I did the below commands and I can see the USB1 HUB enumeration but not able to rsume back from initial suspend and no more ports are detected and getting the b

  echo 0 > /sys/bus/usb/devices/usb1/authorized
  echo 1 > /sys/bus/usb/devices/usb1/authorized

<7>[    1.520374] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0000
<7>[    1.520417] hub 1-0:1.0: hub_suspend
<7>[    1.520441] usb usb1: bus auto-suspend, wakeup 1

Can you please tell me what could be the problem ?

PS: I have connected ID pin to GND.

Thanks for your support.

over 6 years ago

0 Biser Gatchev-XID over 6 years ago

TI__Guru**** 393215 points

Hi,

Which Linux version is this?

0 Titus Stalin over 6 years ago in reply to Biser Gatchev-XID

Expert 1180 points

Hello Biser,

Thanks for your reply.

The kernel version is 3.8.

BTW, its working with TI EVM board which is used the same kernel version.

I've attached the schematics of USB hub portion, please tell me if any issue.

Thanks for your help.

0 Biser Gatchev-XID over 6 years ago in reply to Titus Stalin

TI__Guru**** 393215 points

Please review your design per processors.wiki.ti.com/.../AM335x_Schematic_Checklist. It seems that the VBUS_DET pin of the Hub is not properly connected.

0 Titus Stalin over 6 years ago in reply to Biser Gatchev-XID

Expert 1180 points

Hi Biser,
Thanks for the useful link and for your reply.

Seems, all the suggestions are followed for USB HUb design as per the wiki.
BTW, its not mentioned as mandatory right? , its just pull up and considered as actively high at all the time.
Pls correct me if I'm wrong.
Any other pointers please.
Thanks again!

0 Titus Stalin over 6 years ago in reply to Titus Stalin

Expert 1180 points

Any help ?

0 Biser Gatchev-XID over 6 years ago in reply to Titus Stalin

TI__Guru**** 393215 points

I have notified the USB experts. They will respond here.

0 Titus Stalin over 6 years ago in reply to Biser Gatchev-XID

Expert 1180 points

Thanks Biser for your help!

0 Titus Stalin over 6 years ago in reply to Titus Stalin

Expert 1180 points

Hello Biser,
I'm using USB2514 USB hub like below one. Its seems, my schematics also followed the same. Its working for them.
www.myirtech.com/faq_list.asp

Please help me out of this problem.
Thank you!

0 Dwarakesh Radhakrishnan over 6 years ago in reply to Titus Stalin

Guru 13620 points

Hi Titus,

Is your USB HUB configured using SMBus ? If so, you need to make sure SmBus USB register programming is done again after the reset.

0 Dwarakesh Radhakrishnan over 6 years ago in reply to Dwarakesh Radhakrishnan

Guru 13620 points

I missed to notice schematics. Looks like i2c not being used. Do reprogramming as I commented in above post doesn't hold valid. I am just wondering if there is a bootstrap sequence for the USB hub, which is met in normal boot and not in resuming

0 Titus Stalin over 6 years ago in reply to Dwarakesh Radhakrishnan

Expert 1180 points

Hello Dwarakesh,
Thanks for your help.
I've checked the datasheet of USB2514, it seems I'm using the default internal configuration (CFG_SEL0 & CFG_SEL1) of USB2514 chip, both are pulled down.
manualmachine.com/.../

If you look into this schematic, looks like I have used the same.

Any idea why I am getting this

hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0000

Instead of this expected behavior ??

<7>[ 2.286031] hub 1-0:1.0: state 7 ports 1 chg 0002 evt 0000
<7>[ 2.286068] hub 1-0:1.0: port 1, status 0101, change 0000, 12 Mb/s

BTW, we should enable any other USB Hub (USB2514) driver for this ?
Any other suggestion or help ?

When I do this command "echo 0 > /sys/bus/usb/devices/usb1/authorized" and getting below logs:

<7>[ 594.432413] usb usb1: usb auto-resume
<7>[ 594.432444] hub 1-0:1.0: hub_resume
<7>[ 594.432509] usb usb1: unregistering interface 1-0:1.0
<7>[ 594.432753] musb-hdrc musb-hdrc.1.auto: shutdown urb df319d40 ep1in-intr
<7>[ 594.432964] usb usb1: usb_disable_device nuking non-ep0 URBs
<7>[ 594.432999] usb usb1: bus auto-suspend, wakeup 0

When I do this command "echo 1 > /sys/bus/usb/devices/usb1/authorized" and getting below logs:

<7>[ 645.416396] usb usb1: usb auto-resume
<7>[ 645.416496] usb usb1: configuration #1 chosen from 1 choice
<7>[ 645.416539] usb usb1: adding 1-0:1.0 (config #1, interface 0)
<7>[ 645.416815] hub 1-0:1.0: usb_probe_interface
<7>[ 645.416829] hub 1-0:1.0: usb_probe_interface - got id
<6>[ 645.416851] hub 1-0:1.0: USB hub found
<6>[ 645.421981] hub 1-0:1.0: 1 port detected
<7>[ 645.426125] hub 1-0:1.0: standalone hub
<7>[ 645.426135] hub 1-0:1.0: individual port power switching
<7>[ 645.426144] hub 1-0:1.0: no over-current protection
<7>[ 645.426153] hub 1-0:1.0: Single TT
<7>[ 645.426164] hub 1-0:1.0: TT requires at most 8 FS bit times (666 ns)
<7>[ 645.426174] hub 1-0:1.0: power on to power good time: 10ms
<7>[ 645.426198] hub 1-0:1.0: local power source is good
<7>[ 645.426278] hub 1-0:1.0: enabling power on all ports
<6>[ 645.426445] usb usb1: authorized to connect
<7>[ 645.526503] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0000
<7>[ 645.526557] hub 1-0:1.0: hub_suspend
<7>[ 645.526582] usb usb1: bus auto-suspend, wakeup 1

0 Dwarakesh Radhakrishnan over 6 years ago in reply to Titus Stalin

Guru 13620 points

Hi Titus,

This looks more to be hardware issue/ Has your USB HUB circuitry ever work ? I was assuming, it did not resume after suspend, but worked at boot time.

If it has not worked, how did you get the following success logs ?

<7>[ 2.286031] hub 1-0:1.0: state 7 ports 1 chg 0002 evt 0000
<7>[ 2.286068] hub 1-0:1.0: port 1, status 0101, change 0000, 12 Mb/s

0 Titus Stalin over 6 years ago in reply to Dwarakesh Radhakrishnan

Expert 1180 points

It didn't work ever. At boot time and after boot time, never worked. I have also tested with TI EVM boards with exteranal USB HUB and got the below prints so I expect the same prints.

<7>[ 2.286031] hub 1-0:1.0: state 7 ports 1 chg 0002 evt 0000
<7>[ 2.286068] hub 1-0:1.0: port 1, status 0101, change 0000, 12 Mb/s

Thank you!

Anything we should enable the driver side for the USB2514 Hub ??

0 Dwarakesh Radhakrishnan over 6 years ago in reply to Titus Stalin

Guru 13620 points

Hi,
Driver is required only when I2C is connected and programming is required using I2C. When the CFG_SEL0 and CFG_SEL1 are connected to ground, there is no requirement of explicit driver to program.

0 Titus Stalin over 6 years ago in reply to Dwarakesh Radhakrishnan

Expert 1180 points

Then it seems to be HW issue ??

Can you please check the schematics ?

Any issues with down stream ports section ?

Thanks for your help!

0 Dwarakesh Radhakrishnan over 6 years ago in reply to Titus Stalin

Guru 13620 points

Let me check with my hardware team and come back.

0 Titus Stalin over 6 years ago in reply to Dwarakesh Radhakrishnan

Expert 1180 points

Thank you so much Dwarakesh for your help!
Waiting for your response.

0 Titus Stalin over 6 years ago in reply to Titus Stalin

Expert 1180 points

Hi Dwarakesh,
FYR.

I have got the below link for USB2514B USB Hub schematic.

http://ww1.microchip.com/downloads/en/DeviceDoc/EVB-USB2514B-FS_A1%20%20Evaluation%20Board%20Schematic,%20PDF.pdf

http://www.microchip.com/DevelopmentTools/ProductDetails.aspx?PartNO=evb-usb2514b-fs

I hope it will be helpful to check my board.
Thanks!

0 Titus Stalin over 6 years ago in reply to Dwarakesh Radhakrishnan

Expert 1180 points

Hello Dwarakesh,
Any news ?

0 Dwarakesh Radhakrishnan over 6 years ago in reply to Titus Stalin

Guru 13620 points

They are yet to see since they are busy. Will come back once they post

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Linux/AM3358: USB hub is not resuming