TDA4VM: how to use usb1 as a peripheral mode ???

xianchao liu

Part Number: TDA4VM
Other Parts Discussed in Thread: J721EXCPXEVM,

Hi, I want to use usb1 as a peripheral mode. so i can run "ums 1 mmc 1" in uboot ,make the board as a device.

when i change the "k3-j721e-common-proc-board.dts" as below:

&usbss1 {
	pinctrl-names = "default";
	pinctrl-0 = <&main_usbss1_pins_default>;
	ti,usb2-only;
};

&usb1 {
	dr_mode = "peripheral";
	maximum-speed = "high-speed";
};

and the uboot brinup log is :

U-Boot 2020.01-gfdde6f6e-dirty (Aug 23 2021 - 14:51:40 +0800)

SoC:   J721E SR1.0
Model: Texas Instruments K3 J721E SoC
Reading on-board EEPROM at 0x50 failed 1
Board: J721EX-PM1-SOM rev E2
DRAM:  4 GiB
not found for dev hbmc-mux
Flash: 0 Bytes
MMC:   sdhci@4f80000: 0, sdhci@4fb0000: 1
Loading Environment from MMC... *** Warning - bad CRC, using default environment

In:    serial@2800000
Out:   serial@2800000
Err:   serial@2800000
Reading on-board EEPROM at 0x50 failed 1
Net:   Could not get PHY for ethernet@46000000: addr 0
phy_connect() failed
No ethernet found.

Hit any key to stop autoboot:  0 
=> 
=> ums 1 mmc 1
UMS: LUN 0, dev 1, hwpart 0, sector 0x0, count 0x1dacc00
Unable to get USB2 phy (ret -22)
Unable to get USB3 phy (ret -61)
DRD version v1 (ID: 0004024e, rev: 00000200)
Initialized  ep0 support:  
Initialized  ep1out support: BULK, INT ISO
Initialized  ep2out support: BULK, INT ISO
Initialized  ep3out support: BULK, INT ISO
Initialized  ep4out support: BULK, INT ISO
Initialized  ep5out support: BULK, INT ISO
Initialized  ep6out support: BULK, INT ISO
Initialized  ep7out support: BULK, INT ISO
Initialized  ep8out support: BULK, INT ISO
Initialized  ep9out support: BULK, INT ISO
Initialized  ep10out support: BULK, INT ISO
Initialized  ep11out support: BULK, INT ISO
Initialized  ep12out support: BULK, INT ISO
Initialized  ep13out support: BULK, INT ISO
Initialized  ep14out support: BULK, INT ISO
Initialized  ep15out support: BULK, INT ISO
Initialized  ep1in support: BULK, INT ISO
Initialized  ep2in support: BULK, INT ISO
Initialized  ep3in support: BULK, INT ISO
Initialized  ep4in support: BULK, INT ISO
Initialized  ep5in support: BULK, INT ISO
Initialized  ep6in support: BULK, INT ISO
Initialized  ep7in support: BULK, INT ISO
Initialized  ep8in support: BULK, INT ISO
Initialized  ep9in support: BULK, INT ISO
Initialized  ep10in support: BULK, INT ISO
Initialized  ep11in support: BULK, INT ISO
Initialized  ep12in support: BULK, INT ISO
Initialized  ep13in support: BULK, INT ISO
Initialized  ep14in support: BULK, INT ISO
Initialized  ep15in support: BULK, INT ISO
dev_get_priv: null device
dev_get_priv: null device
dev_get_priv: null device
dev_get_priv: null device
dev_get_priv: null device
dev_get_priv: null device
dev_get_priv: null device

Is there anything else i neet to change ?

over 4 years ago

0 Praveen Rao over 4 years ago

TI__Mastermind 48353 points

Hi,

Are you trying this on the TI J7 EVM (J721EXCPXEVM Evaluation board | TI.com)?

If yes, Please note that the USB1 instance of TDA4VM can only operate in HOST mode as it is connected to the USB HUB on the J721EXCPXEVM Common processor board.

Changing the dts file with --> dr_mode = "peripheral", will not work due to the above.

Thanks.

0 xianchao liu over 4 years ago in reply to Praveen Rao

Prodigy 30 points

No, i'm use myown board. SCH file is as below:

0 Praveen Rao over 4 years ago in reply to xianchao liu

TI__Mastermind 48353 points

Thanks for clarifying that this is a custom board.

Locking at the SCH files, do not see any issue.

Regarding the DT entry changes, dts file update looks correct. But, we had not test the device mode on USB1, as we did not have a way to test it on the TI EVM.

Will check with the team and see if we are missing anything or do it require any code update in the u-boot.

Thanks.

+1 Aswath Govindraju over 4 years ago in reply to Praveen Rao

TI__Prodigy 75 points

Hi,

In the schematic that you shared, I see that there is a resistor divider being used for usb1 instance. So, "ti,vbus-divider" tag needs to be added in usbss1 dt node.

Also, in the logs,

Unable to get USB2 phy (ret -22)

-22 error code indicates that an invalid argument was provided. Usually an error code of -61 comes up indicating nodata available. May I know if "phy-names = "cdns3,usb2-phy" " property is being used in your dt files ?

On the J721E EVM(that Praveen mentioned earlier) I have checked using usb0 instance and it is functioning as expected. Would it be possible to test with usb0 instance on your custom board ?

Thanks,

Aswath

0 xianchao liu over 4 years ago in reply to Aswath Govindraju

Prodigy 30 points

OK,Thanks

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TDA4VM: how to use usb1 as a peripheral mode ???