DRA718: USB-IF test mode on Embedded Host

Agustin Diaz Antuna

Part Number: DRA718

Hi,

I'm trying to set the test modes for USB-IF certification using dra718 on a custom board with Android 8.0. We need to run the test in both host and device port modes without any external HUB.

dwc3 USB driver provides support for device mode using SetFeature(TEST) request or DebugFS. Both implementation are working fine following TI documentation.

The problem is that I couldn't find a way to set each test (test_j, test_k, etc) for host mode since dwc3 doesn't support them.

I'm trying using ehset module enabling it on the Linux kernel. It detects the specific VID/PID of each test but fails running usb_control_msg() for TEST_SE0_NAK, TEST_J, TEST_K and TEST_PACKET while it works with HS_HOST_PORT_SUSPEND_RESUME, SINGLE_STEP_GET_DEV_DESC and SINGLE_STEP_SET_FEATURE.

I guess it could be a missing configuration, what do you advice to do?

Another option is writing the registers directly but I couldn't find the register maps.

Thanks, best regards

Agustín

over 4 years ago

0 Vishal Mahaveer over 4 years ago

TI__Mastermind 33010 points

Hi Agustin,

XHCI spec 4.19.6 Port Test Modes are Implemented in the kernel using following functions in xhci_hub.c.
- xhci_port_set_test_mode()
- xhci_enter_test_mode()

Can you change xhci_dbg() in those functions to xhci_info() and see that these functions are actually called?

Regards,
Vishal

0 Vishal Mahaveer over 4 years ago in reply to Vishal Mahaveer

TI__Mastermind 33010 points

Could you also check the value of this register before and after entering test mode?
PORTPMSC1 0x48890424

0 Agustin Diaz Antuna over 4 years ago in reply to Vishal Mahaveer

Prodigy 50 points

Hi,

We start working from 6AO.1.0 kernel release. This version doesn't implement xhci_port_set_test_mode() or xhci_enter_test_mode().

Looking around the official Linux kernel, it have a patch with this functions. I try it but it doesn't work. It seems that we need another commits.

Could you tell me which patch should we use? It isn't implemented on any version of TI kernel for dra718.

Thanks, best regards,

Agustín

0 Vishal Mahaveer over 4 years ago in reply to Agustin Diaz Antuna

TI__Mastermind 33010 points

Hi Agustin,

Could you check the driver on 4.19 kernel branch of TI?
https://git.ti.com/gitweb?p=ti-linux-kernel/ti-linux-kernel.git;a=shortlog;h=refs/heads/ti-linux-4.19.y

Regards,
Vishal

0 Vishal Mahaveer over 4 years ago in reply to Vishal Mahaveer

TI__Mastermind 33010 points

You could also try register operations as mentioned in the page here https://processors.wiki.ti.com/index.php/USB_Test_Mode_on_DWC3

For dra718 USB1 the addresses would be,

0x48890420
0x48890020
0x48890424

Regards,
Vishal

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DRA718: USB-IF test mode on Embedded Host