On Mon, Dec 19, 2022 at 12:57:43PM +0000, dima.pasechnik@xxxxxxxxxxx wrote: > Hello, > > this is a popular in UK education board: https://microbit.org/ > - the currently sold (Version 2) one. It does on the same USB 3 things: > mass storage, ACM, and serial. Serial appears unknown to the kernel. > > With Linux kernel 6.0.8 on x86_54, and various USB serial drivers installed, upon plugging into USB > port, I see in dmesg: > > [45460.035306] usb 1-3: new full-speed USB device number 10 using xhci_hcd > [45460.166959] usb 1-3: New USB device found, idVendor=0d28, idProduct=0204, bcdDevice=10.00 > [45460.166965] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > [45460.166967] usb 1-3: Product: BBC micro:bit CMSIS-DAP > [45460.166968] usb 1-3: Manufacturer: Arm > [45460.166970] usb 1-3: SerialNumber: 9905360200052833525e24a702a68552000000006e052820 > [45460.172168] usb-storage 1-3:1.0: USB Mass Storage device detected > [45460.172538] scsi host1: usb-storage 1-3:1.0 > [45460.173203] cdc_acm 1-3:1.1: ttyACM0: USB ACM device > [45460.175258] hid-generic 0003:0D28:0204.0005: hiddev96,hidraw0: USB HID v1.00 Device [Arm BBC micro:bit CMSIS-DAP] on usb-0000:00:14.0-3/input3 > [45460.175581] usbserial_generic 1-3:1.4: The "generic" usb-serial driver is only for testing and one-off prototypes. > [45460.175585] usbserial_generic 1-3:1.4: Tell linux-usb@xxxxxxxxxxxxxxx to add your device to a proper driver. > [45460.175587] usbserial_generic 1-3:1.4: device has no bulk endpoints > [45460.175818] usbserial_generic 1-3:1.5: The "generic" usb-serial driver is only for testing and one-off prototypes. > [45460.175821] usbserial_generic 1-3:1.5: Tell linux-usb@xxxxxxxxxxxxxxx to add your device to a proper driver. > [45460.175823] usbserial_generic 1-3:1.5: generic converter detected Is there some script adding this device id to the generic driver such that you are binding to this device? Did the script come with the device? How well does it work? Why did the developer choose to use this generic driver instead of a real one? > [45460.175905] usb 1-3: generic converter now attached to ttyUSB0 It is not unknown, seems to bind here, but does it work? thanks, greg k-h
