AM335X: CSR8510 Linux problem

Simon Defayette5

Other Parts Discussed in Thread: TPS2042, TUSB2046B, AM3352

Hi,

did anyone tried to make the CSR8510 IC working with Linux? I also use a TUSB2046B hub and a TPS2042 IC between the USB port and the AM3352. On the current sensor I get no over current, but the enable pin still at a disable state. For all other devices plugged into the USB port it works well.

When I insert the dongle I get this :

usb 1-1: reset full-speed USB device number 2 using musb-hdrc
[   30.217242] usb 1-1: reset full-speed USB device number 2 using musb-hdrc
[   30.797170] usb 1-1: reset full-speed USB device number 2 using musb-hdrc
[   31.217354] usb 1-1: USB disconnect, device number 2
[   31.347185] usb 1-1: new full-speed USB device number 3 using musb-hdrc
[   31.927156] usb 1-1: new full-speed USB device number 4 using musb-hdrc
[   32.507177] usb 1-1: new full-speed USB device number 5 using musb-hdrc
[   33.047158] usb 1-1: new full-speed USB device number 6 using musb-hdrc
[   33.697170] usb 1-1: new full-speed USB device number 7 using musb-hdrc
[   34.277212] usb 1-1: new full-speed USB device number 8 using musb-hdrc
[   34.857157] usb 1-1: new full-speed USB device number 9 using musb-hdrc
[   35.397169] usb 1-1: new full-speed USB device number 10 using musb-hdrc
[   36.047160] usb 1-1: new full-speed USB device number 11 using musb-hdrc
[   36.627164] usb 1-1: new full-speed USB device number 12 using musb-hdrc
[   37.207194] usb 1-1: new full-speed USB device number 13 using musb-hdrc
[   37.747156] usb 1-1: new full-speed USB device number 14 using musb-hdrc
[   38.397175] usb 1-1: new full-speed USB device number 15 using musb-hdrc
[   38.977174] usb 1-1: new full-speed USB device number 16 using musb-hdrc
[   39.557188] usb 1-1: new full-speed USB device number 17 using musb-hdrc
[   40.097166] usb 1-1: new full-speed USB device number 18 using musb-hdrc
[   40.747178] usb 1-1: new full-speed USB device number 19 using musb-hdrc
[   41.327169] usb 1-1: new full-speed USB device number 20 using musb-hdrc
[   41.907166] usb 1-1: new full-speed USB device number 21 using musb-hdrc
[   42.447202] usb 1-1: new full-speed USB device number 22 using musb-hdrc
[   43.097167] usb 1-1: new full-speed USB device number 23 using musb-hdrc

Any ideas?

Regard,

Simon

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

Is TPS2042 contolled by USBx_DRVVBUS or by the hub? USBx_DRVVBUS is an active high signal. What is the Linux version you use?

0 Simon Defayette5 over 9 years ago in reply to Biser Gatchev-XID

Intellectual 365 points

It's controlled by the Hub, like in the datasheet.

Figure 11 : www.ti.com/.../tusb2046b.pdf

I use the version in TI SDK 2.00.01.07 which is 4.1.13

0 Simon Defayette5 over 9 years ago in reply to Simon Defayette5

Intellectual 365 points

USBx_DRVVBUS controls the 5V power supply, which is ON.

0 Biser Gatchev-XID over 9 years ago in reply to Simon Defayette5

TI__Guru**** 393215 points

Can you post the relevant part of the schematic (AM335X to USB Hub connections)?

0 Simon Defayette5 over 9 years ago in reply to Biser Gatchev-XID

Intellectual 365 points

Is it possible to send you by private email?

0 Biser Gatchev-XID over 9 years ago in reply to Simon Defayette5

TI__Guru**** 393215 points

Yes, please send me a friend request and I will send you my e-mail.

0 Simon Defayette5 over 9 years ago in reply to Biser Gatchev-XID

Intellectual 365 points

Hi Biser,
I had to bypass the 5V on the over-current IC and the CSR8510 communicates, but it's still a problem at a design level. I think there is a bug in the TUSB2046B about the \PWRON pins when using the CSR8510.

Also, If I unplug and replug it a second time, I still see the problem even if it was working the first time...

Simon

0 Biser Gatchev-XID over 9 years ago in reply to Simon Defayette5

TI__Guru**** 393215 points

You may need to increase the bulk bypass capacitors near the USB connector. The USB spec. calls for >120uF on the Host port, you have 2x47uF.

0 Simon Defayette5 over 9 years ago in reply to Biser Gatchev-XID

Intellectual 365 points

Hi Biser,
I tried with 4x 47uF and it didn't change the behavior. Other ideas?

Regards,

Simon

0 Biser Gatchev-XID over 9 years ago in reply to Simon Defayette5

TI__Guru**** 393215 points

I've asked for help on this.

0 Simon Defayette5 over 9 years ago in reply to Biser Gatchev-XID

Intellectual 365 points

Hi Biser,
Did you have news about your engineers on this issue?

Regards,

Simon

0 Biser Gatchev-XID over 9 years ago in reply to Simon Defayette5

TI__Guru**** 393215 points

No. I have escalated the request, not sure what happened to delay this so long. Sorry about this.

0 Simon Defayette5 over 9 years ago in reply to Biser Gatchev-XID

Intellectual 365 points

Hi Biser, what did your team found on this? Now I have to fix that problem for good.

Regards,

Simon

0 Chris Lightcap over 8 years ago in reply to Simon Defayette5

Expert 1800 points

Hi Simon,

Any update on this thread? I'm experiencing a similar problem with my TUSB2077 USB hub.

Thanks,

Chris

0 Simon Defayette5 over 8 years ago in reply to Chris Lightcap

Intellectual 365 points

Hi Chris,
No I didn't found the exact problem. What are the symptoms on your side?

Regards,

Simon

0 Michael Liesenberg85 over 8 years ago in reply to Simon Defayette5

Mastermind 7560 points

Same on my side.
Having some issues on TUSB2077 wit linux:
e2e.ti.com/.../592829

Any progress?

0 Joel Jimenez0 over 8 years ago in reply to Simon Defayette5

TI__Mastermind 18655 points

Hello Simon,

We can help to double check your schematics. Please, send a latest copy to joel.jimenez@ti.com

Regads

0 Joel Jimenez0 over 8 years ago in reply to Joel Jimenez0

TI__Mastermind 18655 points

Simon,

Is this issue solved? Could you please send me your schematics?

Regards

0 Simon Defayette5 over 8 years ago in reply to Joel Jimenez0

Intellectual 365 points

Hi Joel,

Did you find anything in the schematic ?

0 Simon Defayette5 over 8 years ago in reply to Simon Defayette5

Intellectual 365 points

If you read the thread, it was that the OC was not triggering but the POWERON was... but that is controlled but the hub itself. And that POWERON was triggering all the time... why?

0 Joel Jimenez0 over 8 years ago in reply to Simon Defayette5

TI__Mastermind 18655 points

Hello Simon,

I have reviewed your schematics and did not see the caps and series resistors in the upstream port. We still recommend using the series resistors and capacitors on the upstream port (as shown in the datasheet) even with an embedded connection. (27Ohm and 27pF)

POWERON is fully under the control of the host system. The TUSB2046 (or any other hub peripheral) can only respond to commands issued by the hosts system, which is a combination of the host controller and operating system.
The USB host controls the port power of a USB hub using the SET PORT FEATURE (PORT POWER) and CLEAR PORT FEATURE (PORT POWER) commands, these commands cause the TUSB2046B to assert or dessert the PWRONz outputs. These commands are automatically by the USB driver loaded on the USB host. The power commands are sent during system power on / off, reboot, sleep and resume as needed. They will also be sent during overcurrent conditions. It is possible to generate these commands using another application, but it would likely require a custom USB driver to be used.

We would need you to take some USB protocol captures between the host and the hub to find out what is happening.

Regards

0 Simon Defayette5 over 8 years ago in reply to Joel Jimenez0

Intellectual 365 points

So there are good chances that it's driver related.

Other USB devices (Wifi USB key, USB filestorage dongle, etc) seems to work well.

Simon

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AM335X: CSR8510 Linux problem