Re: usb-wacom-tablet failing to register

[Michael Nazzareno Trimarchi <michael@amarulasolutions.com>]

Hi

On Sat, Aug 8, 2020 at 6:06 PM Michael Nazzareno Trimarchi
<michael@amarulasolutions.com> wrote:
>
> Hi Markus
>
> I have seen that you are a committer there so what I have seen that
>
> 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

If I implement
    case InterfaceRequest | USB_REQ_GET_DESCRIPTOR:
        switch (value >> 8) {
        case 0x22:
            p->actual_length = 0;
        default:
            break;
        }
    break;

Them modprobe wacom.ko works. Seems that the WACOM should be blacklist in kernel

Michael
>
> 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
>
>
>
> --
> 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



-- 
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