TUSB9261: why TUSB9261 always reset in our own board？

yk c

Part Number: TUSB9261

hi：

We have use TUSB9261 on linux board. Before connect sata device we have burn the firmware from http://www.ti.com/product/TUSB9261/toolssoftware#softTools 。

After that we connect sata device and start board, but linux can't find new usb device, and TUSB9261 uart print the follow infomation.

[0000000001] Datapath RAM Usage: 80208 / 81920 bytes.
[0000000001] Supported NCQ Depth: 32
[0000000001] U1/U2 Transistions: OFF
[0000000001] USB PHY Suspend: ON
[0000000001] SATA LPM: OFF
[0000000001] Device is Self-powered.
[0000000001] -> usb_hal_init()
[0000000001] USB Core Ver: 0x120a.
[0000000001] USB SSC is OFF.
[0000000051] -> usb_hal_connect()
[0000000
========================================================
|| TUSB926x Firmware v1.06 [Jan 5 2018 12:01:27] ||
|| Device ID: 0x0000 ||
========================================================

Reset Flag(s): [SW] [Power-Up]

what wrong is happen?

over 4 years ago

+1 Malik Barton57 over 4 years ago

TI__Guru 64326 points

Hi,

Let's first ensure that 3.3V power, 1.1V power, GRSTz and USB_VBUS are stable. Can you provide a schematic for review?

0 yk c over 4 years ago in reply to Malik Barton57

Prodigy 20 points

The power domain is ok, we change firmware to TUSB926x_FW_v1.06_SATA_NO_POLARITY_SWAP.hex , then chip is work fine, But only can work as high-speed device. what wrong with it?

0 Malik Barton57 over 4 years ago in reply to yk c

TI__Guru 64326 points

I would like to review schematic to comment further. You could also try short USB cable (if possible) to reduce any signal integrity issues.

0 yk c over 4 years ago in reply to Malik Barton57

Prodigy 20 points

thank you for reply this is own schematic.

0 Malik Barton57 over 4 years ago in reply to yk c

TI__Guru 64326 points

How are 9261_3V3 and VDDA_3V3 different? Different FW version only affect SATA Polarity. From your schematic you should be using TUSB926x_FW_v1.06_SATA_NO_POLARITY_SWAP.

0 yk c over 4 years ago in reply to Malik Barton57

Prodigy 20 points

No, they are only the name different. Now, We using TUSB926x_FW_v1.06_SATA_NO_POLARITY_SWAP , and 9261 is working.

0 Malik Barton57 over 4 years ago in reply to yk c

TI__Guru 64326 points

Thanks for the update!

0 yk c over 4 years ago in reply to Malik Barton57

Prodigy 20 points

Because 9261 can't work in usb3.0 we disconnect USB_DM USB_DP, after that our board can't detect 9261 as usb device. what wrong?

0 Malik Barton57 over 4 years ago in reply to yk c

TI__Guru 64326 points

Diss connecting USB 2 will not force USB 3. USB 2 (DP and DM) should remain connected. Is SSTX and SSRX connected to a USB connector or CPU on your PCB?

0 yk c over 4 years ago in reply to Malik Barton57

Prodigy 20 points

Yes we connected SSTX and SSRX to cpu, but the connection type like this

https://e2e.ti.com/support/interface-group/interface/f/interface-forum/383012/tusb9261-use-hub-for-only-usb-2-0-high-speed/1357337?tisearch=e2e-sitesearch&keymatch=TUSB9261%2525252520USB3.0#1357337 .

I also read this

e2e.ti.com/.../2896160

So we disconnect DP and DM to try whether 9261 is work usual.

0 Malik Barton57 over 4 years ago in reply to yk c

TI__Guru 64326 points

Could you provide a block diagram to help clarify the configuration in the ticket is not allowed.

0 yk c over 4 years ago in reply to Malik Barton57

Prodigy 20 points

We connect 9286 like this. Do you have any concern for such configuration?

0 Malik Barton57 over 4 years ago in reply to yk c

TI__Guru 64326 points

This connection is not allowed by USB spec. USB 2 should be directly connected to the USB Host not through a USB 2 hub. If you hold the USB 2 hub in reset will TUSB9261 enumerate at USB 3?

0 yk c over 4 years ago in reply to Malik Barton57

Prodigy 20 points

I try you suggestion, but TUSB9261 can't work.

below is kernel debug :

[ 393.560977] cdns-usb3 5b110000.usb3: wait lpm_clk_req timeout
[ 393.692156] cdns-usb3 5b110000.usb3: wait phy_refclk_req timeout
[ 393.907484] cdns-usb3 5b110000.usb3: wait phy_refclk_req timeout

0 Malik Barton57 over 4 years ago in reply to yk c

TI__Guru 64326 points

Then it seems you need to bypass the USB Hub in order to get TUSB9261 in the correct HW configuration.

0 yk c over 4 years ago in reply to Malik Barton57

Prodigy 20 points

Now we bypass the USB Hub， but the issue still remain. whether TUSB9261 USB 2 must connect ?

0 Malik Barton57 over 4 years ago in reply to yk c

TI__Guru 64326 points

Yes USB 3 and USB 2 should be connected to the USB Host. Can you provide a USB trace so that I can take a look?

0 yk c over 4 years ago in reply to Malik Barton57

Prodigy 20 points

We exchange TUSB9261 USB_SSTX and USB_SSRX. Now 9261 is work in USB3.0. Thank you!

0 Malik Barton57 over 4 years ago in reply to yk c

TI__Guru 64326 points

I see glad you can resolve your issues.

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TUSB9261: why TUSB9261 always reset in our own board？