Re: usb-wacom-tablet failing to register

[Markus Armbruster]

Michael Nazzareno Trimarchi <michael@amarulasolutions.com> writes:

> Hi Markus
>
> I have seen that you are a committer there so what I have seen that

I know precious little about USB, and nothing about this particular
device.  I'm cc'ing our USB maintainer Gerd.

> This request is not implement
>  switch (request) {
>     case InterfaceRequest | USB_REQ_GET_DESCRIPTOR:
>
> When linux probe it fail here
>
> ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
>>                         HID_DT_REPORT, rdesc, rsize);
>
> I think that I miss something in documentation
>
> Running 5.8.0-rc3 and qemu 4.2.0
>
> Michael
>
> On Sat, Aug 8, 2020 at 4:59 PM Michael Nazzareno Trimarchi
> <michael@amarulasolutions.com> wrote:
>>
>> Hi
>>
>> What I have seen is that the parse fail to execute
>> hid ll_driver parse fai for
>>
>>  ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
>>                         HID_DT_REPORT, rdesc, rsize);
>>
>> Now this is not implemented in hw/dev-wacom.c . What am I missing?
>>
>> #!/bin/sh
>> IMAGE_DIR="${0%/*}/"
>>
>> if [ "${1}" = "serial-only" ]; then
>>     EXTRA_ARGS='-nographic'
>> else
>>     EXTRA_ARGS='-serial stdio'
>> fi
>>
>> export PATH="/home/michael/work/amarula/buildroot/output/host/bin:${PATH}"
>> exec   qemu-system-i386 -M pc -kernel ${IMAGE_DIR}/bzImage -usb
>> -device usb-wacom-tablet -drive
>> file=${IMAGE_DIR}/rootfs.ext2,if=virtio,format=raw -append "rootwait
>> root=/dev/vda console=tty1 console=ttyS0"  -net nic,model=virtio -net
>> use
>> r  ${EXTRA_ARGS}
>>
>> This is how I run it
>>
>> Michael
>>
>> On Sat, Jul 11, 2020 at 4:38 PM Michael Nazzareno Trimarchi
>> <michael@amarulasolutions.com> wrote:
>> >
>> > Hi all
>> >
>> > On my 4.17.0-rc1 linux kernel i386 running on qemu, I can't register
>> > the wacom driver emulation
>> > QEMU emulator version 4.2.0 (Debian 1:4.2-3ubuntu6.3)
>> > Copyright (c) 2003-2019 Fabrice Bellard and the QEMU Project developers
>> >
>> > [    0.395368] ata2.00: configured for MWDMA2
>> > [    0.397049] scsi 1:0:0:0: CD-ROM            QEMU     QEMU DVD-ROM
>> >   2.5+ PQ: 0 ANSI: 5
>> > [    0.584135] usb 2-1: new full-speed USB device number 2 using xhci_hcd
>> > [    0.734449] usb 2-1: New USB device found, idVendor=056a,
>> > idProduct=0000, bcdDevice=42.10
>> > [    0.734461] usb 2-1: New USB device strings: Mfr=1, Product=2, 
>> > SerialNumber=3
>> > [    0.734466] usb 2-1: Product: Wacom PenPartner
>> > [    0.734470] usb 2-1: Manufacturer: QEMU
>> > [    0.734474] usb 2-1: SerialNumber: 1-0000:00:04.0-1
>> > [    0.737347] usbhid 2-1:1.0: can't add hid device: -32
>> > [    0.737366] usbhid: probe of 2-1:1.0 failed with error -32
>> >
>> > I get back an error. Any suggestions?
>> >
>> > Michael
>>
>>
>>
>> --
>> Michael Nazzareno Trimarchi
>> Amarula Solutions BV
>> COO Co-Founder
>> Cruquiuskade 47 Amsterdam 1018 AM NL
>> T. +31(0)851119172
>> M. +39(0)3479132170
>> [`as] https://www.amarulasolutions.com