[参考译文] AM625：在 UBoot 中启用 USB0

尊敬的 Tony：

qi yu1 说：

usbss0：dwc3-usb@f900000 {
  兼容="ti、am62-USB"；
   REG =<0x00 0x0f900000 0x00 0x800>
+  <0x00 0x0f908000 0x00 0x400>；

否、请勿触摸 k3-am62-main.dtsi 文件。

"2"是指虚拟根集线器和 USB 设备。

这是 USB0处于主机模式的 SDK9.2 U-Boot 器件树补丁。

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;

这是 USB MSC 引导中的 U-Boot 引导日志。

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
=>