DRA829J: Enable USB host in u-boot (and kernel)

Bo Mellberg

Part Number: DRA829J
Other Parts Discussed in Thread: DRA821, TUSB8041, TDA4VM

Hello experts,

We have a custom board that has mimicked the BeagleBoneAI64 in its layout with usb-hub and two host ports connected to that hub.

I am trying to get those two ports functioning in U-boot (Linux will follow) to verify that the hardware is correct.

I have copied the usb-related blocks in the dts:

main_usbss1_pins_default: main-usbss1-pins-default {

pinctrl-single,pins = <

J721E_IOPAD(0x290, INPUT_DISABLE, 1) /* (U6) USB0_DRVVBUS.USB1_DRVVBUS */

>;

};

<snip>

mcu_usbss1_pins_default: mcu-usbss1-pins-default {

pinctrl-single,pins = <

J721E_WKUP_IOPAD(0x3c, PIN_OUTPUT_PULLUP, 5) /* (A23) MCU_OSPI1_LBCLKO.WKUP_GPIO0_30 */

>;

};

<snip>

&usb_serdes_mux {

idle-states = <1>, <1>; /* USB0 to SERDES3, USB1 to SERDES2 */

};

&serdes_ln_ctrl {

idle-states = <J721E_SERDES0_LANE0_IP4_UNUSED>, <J721E_SERDES0_LANE1_IP4_UNUSED>,

<J721E_SERDES1_LANE0_PCIE1_LANE0>, <J721E_SERDES1_LANE1_PCIE1_LANE1>,

<J721E_SERDES2_LANE0_IP1_UNUSED>, <J721E_SERDES2_LANE1_USB3_1>,

<J721E_SERDES3_LANE0_USB3_0_SWAP>, <J721E_SERDES3_LANE1_USB3_0>,

<J721E_SERDES4_LANE0_EDP_LANE0>, <J721E_SERDES4_LANE1_EDP_LANE1>,

<J721E_SERDES4_LANE2_EDP_LANE2>, <J721E_SERDES4_LANE3_EDP_LANE3>;

};

&serdes2 {

serdes2_usb_link: phy@1 {

reg = <1>;

cdns,num-lanes = <1>;

#phy-cells = <0>;

cdns,phy-type = <PHY_TYPE_USB3>;

resets = <&serdes_wiz2 2>;

};

&usbss1 {

pinctrl-names = "default";

pinctrl-0 = <&main_usbss1_pins_default>, <&mcu_usbss1_pins_default>;

ti,vbus-divider;

};

&usb1 {

dr_mode = "host";

maximum-speed = "super-speed";

phys = <&serdes2_usb_link>;

phy-names = "cdns3,usb3-phy";

};

In U-boot I see the following (logging is turned on):

=> usb start
starting USB...

Bus usb@6400000: drivers/usb/cdns3/core.c:337- cdns3_probe() cdns-usb3-host usb@6400000: Unable to get USB2 phy (ret -61)

drivers/clk/clk-uclass.c:112-clk_get_by_index_tail() prop: returning err=-2
drivers/clk/clk-uclass.c:112-clk_get_by_index_tail() prop: returning err=-2
drivers/clk/clk-uclass.c:112-clk_get_by_index_tail() prop: returning err=-2
drivers/clk/clk-uclass.c:112-clk_get_by_index_tail() prop: returning err=-2

drivers/phy/cadence/phy-cadence-sierra.c:1122-cdns_sierra_phy_probe() cdns,sierra serdes@5020000: PHY not found 0x7364 vs 0x0

drivers/usb/cdns3/core.c:345- cdns3_probe() cdns-usb3-host usb@6400000: Unable to get USB3 phy (ret -19)
drivers/usb/cdns3/drd.c:273- cdns3_drd_init() cdns-usb3-host usb@6400000: DRD version v1 (ID: 0004024e, rev: 00000200)
drivers/usb/cdns3/core.c:309-cdns3_hw_role_switch() cdns-usb3-host usb@6400000: set 1 has failed, back to 0
scanning bus usb@6400000 for devices... 1 USB Device(s) found
scanning usb for storage devices... 0 Storage Device(s) found

As always, I'm thankful for any help.

/Bo

over 1 year ago

0 Bo Mellberg over 1 year ago in reply to Siddharth Vadapalli

Intellectual 561 points

Siddharth Vadapalli said:
k3conf dump clock

I don't have that command. How can I add it to my Yocto tree?

Best regards,

/Bo

0 Siddharth Vadapalli over 1 year ago in reply to Bo Mellberg

TI__Expert 3575 points

Bo Mellberg said:
I don't have that command. How can I add it to my Yocto tree?

Bo,

You can fetch it from:
https://git.ti.com/cgit/k3conf/k3conf/tree/

I am also attaching the Cross-Compiled binary of k3conf below which you can use:
https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/7282.k3conf

Regards,
Siddharth.

0 Bo Mellberg over 1 year ago in reply to Siddharth Vadapalli

Intellectual 561 points

Thanks Siddharth,

The clock dump is attached.

Best regards,

/Bo

clock_dump.txt

0 Bo Mellberg over 1 year ago in reply to Bo Mellberg

Intellectual 561 points

Thanks Siddharth,

The clock dump is attached.

Best regards,

/Bo

clock_dump.txt

0 Bo Mellberg over 1 year ago in reply to Siddharth Vadapalli

Intellectual 561 points

Sorry, have you seen my latest posts? I didn't get email notifications about them.

Best regards,

/Bo

0 Bo Mellberg over 1 year ago in reply to Siddharth Vadapalli

Intellectual 561 points

One last update before the weekend.

I managed to get usb3.0 working in U-Boot as well as Linux. Apparently there is a missing pll-clock setting in the device tree that has been added for usb0 but not for usb1:

File k3-j721e-asp3-u-boot.dtsi. The wiz2 settings and usbss1 and usb1 settings are added by me:

&wiz3_pll1_refclk {
	assigned-clocks = <&wiz3_pll1_refclk>, <&wiz3_pll0_refclk>;
	assigned-clock-parents = <&k3_clks 295 0>, <&k3_clks 295 9>;
};

&main_usbss0_pins_default {
	bootph-pre-ram;
};

&usbss0 {
	bootph-pre-ram;
};

&usb0 {
	dr_mode = "peripheral";
	bootph-pre-ram;
};

&wiz2_pll1_refclk {
	assigned-clocks = <&wiz2_pll1_refclk>, <&wiz2_pll0_refclk>;
	assigned-clock-parents = <&k3_clks 294 0>, <&k3_clks 294 11>;
};

&main_usbss1_pins_default {
	bootph-pre-ram;
};

&usbss1 {
	bootph-pre-ram;
};

&usb1 {
	dr_mode = "host";
	bootph-pre-ram;
};

These settings seem to take precedence in Linux as well, because there are no more errors when I boot, and lsmod now works:

root@asp3:~# dmesg | grep usb
[    0.043157] usbcore: registered new interface driver usbfs
[    0.043170] usbcore: registered new interface driver hub
[    0.043181] usbcore: registered new device driver usb
[    0.091284] usbcore: registered new interface driver usb-storage
[    0.093236] usbcore: registered new interface driver usbhid
[    0.093238] usbhid: USB HID core driver
[    0.484801] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.01
[    0.484806] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.484809] usb usb1: Product: xHCI Host Controller
[    0.484812] usb usb1: Manufacturer: Linux 6.1.33-g999 xhci-hcd
[    0.484815] usb usb1: SerialNumber: xhci-hcd.0.auto
[    0.485213] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[    0.485248] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 6.01
[    0.485252] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    0.485256] usb usb2: Product: xHCI Host Controller
[    0.485259] usb usb2: Manufacturer: Linux 6.1.33-g999 xhci-hcd
[    0.485261] usb usb2: SerialNumber: xhci-hcd.0.auto
[    0.740211] usb 1-1: new high-speed USB device number 2 using xhci-hcd
[    0.888514] usb 1-1: New USB device found, idVendor=0451, idProduct=8142, bcdDevice= 1.00
[    0.888521] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=1
[    0.888524] usb 1-1: SerialNumber: 3001008138CE
[    1.016227] usb 2-1: new SuperSpeed USB device number 2 using xhci-hcd
[    1.036439] usb 2-1: New USB device found, idVendor=0451, idProduct=8140, bcdDevice= 1.00
[    1.036444] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    1.176209] usb 1-1.1: new high-speed USB device number 3 using xhci-hcd
[    1.290497] usb 1-1.1: New USB device found, idVendor=13fe, idProduct=4123, bcdDevice= 1.00
[    1.290504] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    1.290507] usb 1-1.1: Product: USB DISK Pro
[    1.290510] usb 1-1.1: Manufacturer:
[    1.290512] usb 1-1.1: SerialNumber: 07103C7537156A52
[    1.291186] usb-storage 1-1.1:1.0: USB Mass Storage device detected
[    1.291375] scsi host0: usb-storage 1-1.1:1.0

root@asp3:~# lsusb
Bus 002 Device 002: ID 0451:8140 Texas Instruments, Inc. TUSB8041 4-Port Hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 13fe:4123 Kingston Technology Company Inc. USB DISK Pro
Bus 001 Device 002: ID 0451:8142 Texas Instruments, Inc. TUSB8041 4-Port Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Thanks for all help, it was the register investigations that led me to the clocks setup.

Thank you, Diwakar and Siddharth!

Best regards,

/Bo

+1 Diwakar Dhyani over 1 year ago in reply to Bo Mellberg

TI__Guru 56925 points

Hi Bo

Great to hear that :)

Regards
Diwakar

0 Bo Mellberg over 1 year ago in reply to Diwakar Dhyani

Intellectual 561 points

Diwakar,

There is still one thing that needs fixing. Apparently I need to run "start usb" in U-Boot, to make it scan and detect the usb-bus. If I don't, the error message will re-appear in Linux, and no working usb host.

Do you know what needs to be done to make the Linux boot also trigger a "start usb"?

Best regards,

/Bo

0 Diwakar Dhyani over 1 year ago in reply to Bo Mellberg

TI__Guru 56925 points

Hi Bo

sorry for the wrong interpretation

corrct me if my understanding is right

USB work : Run usb start in uboot and then check in linux

USB does not work: Do not run usb start in uboot and then check in linux

Regards
Diwakar

0 Bo Mellberg over 1 year ago in reply to Diwakar Dhyani

Intellectual 561 points

Hi Diwakar,

No, it is not detecting any device changes on the usb ports. I would expect it to show per default. Also, as I said, the serdes error is back in Linux (if I don't do usb start):

[ 0.572899] cdns-sierra-phy 5020000.serdes: Timeout waiting for PHY status ready
[ 0.580290] phy phy-5020000.serdes.9: phy poweron failed --> -110

Best regards,

/Bo

0 Diwakar Dhyani over 1 year ago in reply to Bo Mellberg

TI__Guru 56925 points

Hi Bo

One quick thing which we can do is dump those serdes register before running the USB start and after that to see what exactly is getting change.

Regards
Diwakar

0 Bo Mellberg over 1 year ago in reply to Diwakar Dhyani

Intellectual 561 points

Hi Diwakar,

I tried to read the reset-register for serdes2:

Without "usb start":

=> md 0x0502040c 1
"Error" handler, esr 0xbf000000
elr: 00000000808c98b0 lr : 00000000808c6080 (reloc)
elr: 00000000fff8a8b0 lr : 00000000fff87080
x0 : 00000000fde86119 x1 : 00000000fffaa557
x2 : 00000000fde86030 x3 : 00000000ffffffd0
x4 : 0000000000000000 x5 : 00000000fde86111
x6 : 0000000000000063 x7 : 00000000fde86060
x8 : 0000000000000010 x9 : 0000000000000008
x10: 00000000ffffffd8 x11: 0000000000000010
x12: 000000000001869f x13: 00000000fde86388
x14: 00000000fde86490 x15: 0000000000000021
x16: 00000000ffeda788 x17: 0000000000000000
x18: 00000000fdea0d90 x19: 0000000000000004
x20: 0000000000000004 x21: 0000000000000001
x22: 0000000005020410 x23: 00000000fde86119
x24: 0000000000000000 x25: 00000000fde860c8
x26: 00000000fffaa557 x27: 0000000000000008
x28: 0000000000000004 x29: 00000000fde85fe0

Code: b9004fff a9430fe2 a9010fe2 a9440fe2 (a9020fe2)
Resetting CPU ...

resetting ...

With "usb start":

=> md 0x0502040c 1
0502040c: b2000000 ....

Best regards,

/Bo

0 Diwakar Dhyani over 1 year ago in reply to Bo Mellberg

TI__Guru 56925 points

Hi Bo

Seems you serdes is not up before usb start.

Hoping now there is just device tree changes no changes in the driver?

Regards

Diwakar

0 Bo Mellberg over 1 year ago in reply to Diwakar Dhyani

Intellectual 561 points

Hi Diwakar,

Correct. There are no changes in the driver right now.

Maybe I can force a probe from within the driver. I will try.

Best regards,

/Bo

0 Bo Mellberg over 1 year ago in reply to Bo Mellberg

Intellectual 561 points

I'm still having trouble getting USB3.0 to work in Linux. As of now, I have to perform "usb start" in U-Boot, to get it to work in Linux. If I don't do "usb start", serdes is not setup correctly, and lsusb gives an empty output:

[ 0.574511] cdns-sierra-phy 5020000.serdes: Timeout waiting for PHY status ready
[ 0.581907] phy phy-5020000.serdes.9: phy poweron failed --> -110

root@asp3:~# lsusb
root@asp3:~# lsusb -v
root@asp3:~# usb-devices

When reading the reset-register of serdes2, it seems the pll-clocks are not set correctly:

root@asp3:~# devmem2 0x0502040c
/dev/mem opened.
Memory mapped at address 0xffff9b7a9000.
Read at address 0x0502040C (0xffff9b7a940c): 0x92000000

When USB3.0 is working, the value of the reset-register is 0xb1000000 or 0xb2000000

Best regards,

/Bo

0 Bo Mellberg over 1 year ago in reply to Bo Mellberg

Intellectual 561 points

Update.

I had a conflicting node late in my dts:

&wiz2_pll1_refclk {

assigned-clocks = <&wiz2_pll1_refclk>;

assigned-clock-parents = <&cmn_refclk1>;

};

Which reset the clock setting that I described above. After removing the conflicting node, USB3.0 is now working fine in both U-Boot and Linux.

Thanks again for all help!

/Bo

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DRA829J: Enable USB host in u-boot (and kernel)