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AM625: Enable USB0 in UBOOT

Tony Tang
Mastermind 29842 points

Part Number: AM625

Tool/software:

How to enable USB0 in UBOOT?

no matter with default .dts, or copy usb0 configuration from Kernel to UBOOT dts. same result as below I got on AM62-SK-P1

Customer target to use USB0 in UBOOT as Host to support USB-MSC.

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/0042.k3_2D00_am625_2D00_sk.dts

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/0042.k3_2D00_am62_2D00_main.dtsi

U-Boot SPL 2023.04-dirty (Jun 05 2024 - 12:41:56 +0800)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.7--v09.02.07 (Kool Koala)')
SPL initial stack usage: 13408 bytes
Trying to boot from MMC2
Authentication passed
Authentication passed
Authentication passed
Authentication passed
Authentication passed
Starting ATF on ARM64 core...

NOTICE: BL31: v2.10.0(release):v2.10.0-367-g00f1ec6b87-dirty
NOTICE: BL31: Built : 16:09:05, Feb 9 2024

U-Boot SPL 2023.04-ti-gf9b966c67473 (Mar 19 2024 - 20:31:40 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.7--v09.02.07 (Kool Koala)')
SPL initial stack usage: 1856 bytes
Trying to boot from MMC2
Authentication passed
Authentication passed


U-Boot 2023.04-dirty (Jun 05 2024 - 12:42:42 +0800)

SoC: AM62X SR1.0 HS-FS
Model: Texas Instruments AM625 SK
EEPROM not available at 80, trying to read at 81
Board: AM62B-SKEVM-P1 rev A
DRAM: 2 GiB
Core: 72 devices, 32 uclasses, devicetree: separate
MMC: mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from nowhere... OK
In: serial
Out: serial
Err: serial
Net: eth0: ethernet@8000000port@1

=>
=> usb start
starting USB...
Bus usb@31100000: generic_phy_get_bulk : no phys property
Register 1000840 NbrPorts 1
Starting the controller
USB XHCI 1.10

#2. UBOOT dts did not update USB configuration, but it is updated in Kernel dts.

usbss0: dwc3-usb@f900000 {
    compatible = "ti,am62-usb";
     reg = <0x00 0x0f900000 0x00 0x800>,
+   <0x00 0x0f908000 0x00 0x400>;

#3. Insert U flash and power again, found 2 USB devices on usb@31100000, why have 2 on USB1?

=> usb start
starting USB...
Bus usb@31100000: Register 1000840 NbrPorts 1
Starting the controller
USB XHCI 1.10
scanning bus usb@31100000 for devices... 2 USB Device(s) found
scanning usb for storage devices... 1 Storage Device(s) found
=>

  • +1
    TI__Guru**** 174861 points

    Hi Tony,

    Tony Tang said:
    usbss0: dwc3-usb@f900000 {
        compatible = "ti,am62-usb";
         reg = <0x00 0x0f900000 0x00 0x800>,
    +   <0x00 0x0f908000 0x00 0x400>;

    No, please don't touch k3-am62-main.dtsi file.

    Tony Tang said:
    why have 2 on USB1?

    '2' means virtual root hub and the usb device.

    Here is the SDK9.2 U-Boot device tree patch for USB0 to be in host mode.

    diff --git a/arch/arm/dts/k3-am625-sk.dts b/arch/arm/dts/k3-am625-sk.dts
index 823e4320c3c4..4f559dbc2f4d 100644
--- a/arch/arm/dts/k3-am625-sk.dts
+++ b/arch/arm/dts/k3-am625-sk.dts
@@ -569,7 +569,7 @@
 };
 
 &usb0 {
-       dr_mode = "peripheral";
+       dr_mode = "host";
 };
 
 &usb1 {
diff --git a/arch/arm/dts/k3-am62x-sk-common-u-boot.dtsi b/arch/arm/dts/k3-am62x-sk-common-u-boot.dtsi
index 4265b434168b..9db329975f06 100644
--- a/arch/arm/dts/k3-am62x-sk-common-u-boot.dtsi
+++ b/arch/arm/dts/k3-am62x-sk-common-u-boot.dtsi
@@ -122,7 +122,7 @@
 };
 
 &usb0 {
-       dr_mode = "peripheral";
+       dr_mode = "host";
        /* Since role switching is not supported in U-Boot */
        /delete-property/ extcon;
        bootph-pre-ram;

    Here is the U-Boot boot log in USB MSC boot.

    U-Boot SPL 2023.04-00001-g0f287d63fb2d-dirty (Jun 05 2024 - 11:13:00 -0500)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.7--v09.02.07 (Kool Koala)')
SPL initial stack usage: 13408 bytes
Trying to boot from USB
Bus usb@31000000: Register 1000840 NbrPorts 1
Starting the controller
USB XHCI 1.10
Bus usb@31100000: Register 1000840 NbrPorts 1
Starting the controller
USB XHCI 1.10
scanning bus usb@31000000 for devices... 2 USB Device(s) found
scanning bus usb@31100000 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 1 Storage Device(s) found
Authentication passed
Authentication passed
Authentication passed
Authentication passed
Authentication passed
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.10.0(release):v2.10.0-367-g00f1ec6b87-dirty
NOTICE:  BL31: Built : 16:09:05, Feb  9 2024

U-Boot SPL 2023.04-00001-g0f287d63fb2d-dirty (Jun 05 2024 - 11:13:06 -0500)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.7--v09.02.07 (Kool Koala)')
SPL initial stack usage: 1856 bytes
MMC: no card present
** Bad device specification mmc 1 **
Couldn't find partition mmc 1:1
Error: could not access storage.
Trying to boot from USB
Bus usb@31000000: Register 1000840 NbrPorts 1
Starting the controller
USB XHCI 1.10
Bus usb@31100000: Register 1000840 NbrPorts 1
Starting the controller
USB XHCI 1.10
scanning bus usb@31000000 for devices... 2 USB Device(s) found
scanning bus usb@31100000 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 1 Storage Device(s) found
Authentication passed
Authentication passed


U-Boot 2023.04-00001-g0f287d63fb2d-dirty (Jun 05 2024 - 11:13:06 -0500)

SoC:   AM62X SR1.0 HS-FS
Model: Texas Instruments AM625 SK
EEPROM not available at 80, trying to read at 81
Board: AM62B-SKEVM rev A
DRAM:  no bloblist found!2 GiB
Core:  72 devices, 31 uclasses, devicetree: separate
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from nowhere... OK
In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet@8000000port@1
Hit any key to stop autoboot:  0
=>

  • 0 in reply to Bin Liu
    TI__Mastermind 29842 points

    Bin,

    we don't use USB-MSC boot, just want to use USB-MSC in UBOOT.

    With the patch, same result

    U-Boot 2023.04-dirty (Jun 06 2024 - 11:33:01 +0800)

SoC:   AM62X SR1.0 HS-FS
Model: Texas Instruments AM625 SK
EEPROM not available at 80, trying to read at 81
Board: AM62B-SKEVM-P1 rev A
DRAM:  2 GiB
Core:  72 devices, 32 uclasses, devicetree: separate
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from nowhere... OK
In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet@8000000port@1
=>
=> usb start
starting USB...
Bus usb@31100000: generic_phy_get_bulk : no phys property
Register 1000840 NbrPorts 1
Starting the controller
USB XHCI 1.10
scanning bus usb@31100000 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found
=>

  • 0 in reply to Tony Tang
    TI__Guru**** 174861 points

    Tony,

    This U-Boot patch makes USB0 in host mode for SD card boot too:

    U-Boot SPL 2023.04-00001-g0f287d63fb2d-dirty (Jun 06 2024 - 10:49:43 -0500)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.7--v09.02.07 (Kool Koala)')
SPL initial stack usage: 13408 bytes
Trying to boot from MMC2
Authentication passed
Authentication passed
Authentication passed
Authentication passed
Authentication passed
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.10.0(release):v2.10.0-367-g00f1ec6b87-dirty
NOTICE:  BL31: Built : 16:09:05, Feb  9 2024

U-Boot SPL 2023.04-00001-g0f287d63fb2d-dirty (Jun 06 2024 - 10:49:49 -0500)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.7--v09.02.07 (Kool Koala)')
SPL initial stack usage: 1856 bytes
Trying to boot from MMC2
Authentication passed
Authentication passed


U-Boot 2023.04-00001-g0f287d63fb2d-dirty (Jun 06 2024 - 10:49:49 -0500)

SoC:   AM62X SR1.0 HS-FS
Model: Texas Instruments AM625 SK
EEPROM not available at 80, trying to read at 81
Board: AM62B-SKEVM rev A
DRAM:  2 GiB
Core:  72 devices, 31 uclasses, devicetree: separate
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from nowhere... OK
In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet@8000000port@1
Hit any key to stop autoboot:  0 
=> 
=> usb start
starting USB...
Bus usb@31000000: generic_phy_get_bulk : no phys property
Register 1000840 NbrPorts 1
Starting the controller
USB XHCI 1.10
Bus usb@31100000: generic_phy_get_bulk : no phys property
Register 1000840 NbrPorts 1
Starting the controller
USB XHCI 1.10
scanning bus usb@31000000 for devices... 2 USB Device(s) found
scanning bus usb@31100000 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 1 Storage Device(s) found
=> 
=> usb storage
  Device 0: Vendor: SanDisk  Rev: 1.10 Prod: Cruzer          
            Type: Removable Hard Disk
            Capacity: 7633.5 MB = 7.4 GB (15633408 x 512)
=>

    The following commands show USB0 device tree configures it to host mode:

    => fdt addr $fdtcontroladdr
Working FDT set to fd5e7840
=> fdt print usb0
usb@31000000 {
        compatible = "snps,dwc3";
        reg = <0x00000000 0x31000000 0x00000000 0x00050000>;
        interrupts = <0x00000000 0x000000bc 0x00000004 0x00000000 0x000000bc 0x00000004>;
        interrupt-names = "host", "peripheral";
        maximum-speed = "high-speed";
        dr_mode = "host";
        bootph-pre-ram;
        phandle = <0x00000071>;
};

  • 0 in reply to Bin Liu
    TI__Mastermind 29842 points

    Hi Bin，

    My mistake, I modified the k3-am62x-sk-common.dtsi other than k3-am62x-sk-common-u-boot.dtsi file, it works now.

    But I did not find where included the k3-am62x-sk-common-u-boot.dtsi to k3-am625-sk.dts