I made this patch with the help of pardis at IRC. This gives support for UGREEN
USB to Serial RS-232 based on Prolific PL2303.
Index: uplcom.c
===================================================================
RCS file: /cvs/src/sys/dev/usb/uplcom.c,v
retrieving revision 1.77
diff -u -p -u -p -r1.77 uplcom.c
--- uplcom.c 27 Jan 2021 17:28:19 -0000 1.77
+++ uplcom.c 15 Jun 2021 13:19:22 -0000
@@ -162,6 +162,7 @@ static const struct usb_devno uplcom_dev
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303GC },
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303X },
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303X2 },
+ { USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303ALB },
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_RSAQ2 },
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303BENQ },
{ USB_VENDOR_PROLIFIC2, USB_PRODUCT_PROLIFIC2_PL2303 },
Index: usbdevs.h
===================================================================
RCS file: /cvs/src/sys/dev/usb/usbdevs.h,v
retrieving revision 1.752
diff -u -p -u -p -r1.752 usbdevs.h
--- usbdevs.h 18 May 2021 14:23:53 -0000 1.752
+++ usbdevs.h 15 Jun 2021 13:19:23 -0000
@@ -3656,6 +3656,7 @@
#define USB_PRODUCT_PROLIFIC_PL2501 0x2501 /* PL2501
Host-Host */
#define USB_PRODUCT_PROLIFIC_PL2303X 0xaaa0 /* PL2303
Serial */
#define USB_PRODUCT_PROLIFIC_PL2303X2 0xaaa2 /* PL2303
Serial */
+#define USB_PRODUCT_PROLIFIC_PL2303ALB 0x23c3 /* PL2303
Serial */
/* Prolific(2) products */
#define USB_PRODUCT_PROLIFIC2_PL2303 0x2303 /* PL2303
Serial */
