Re: cdc-acm linux kernel

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[ Please respond inline instead of top-posting. ]

On Mon, Aug 20, 2018 at 04:50:25PM +0300, Алексей Болдырев wrote:
> 20.08.2018, 16:46, "Johan Hovold" <johan@xxxxxxxxxx>:
> > [ Reshuffling your reply, and responding inline below ]
> >
> > On Mon, Aug 20, 2018 at 04:27:37PM +0300, Алексей Болдырев wrote:
> >>  > 20.08.2018, 11:42, "Johan Hovold" <johan@xxxxxxxxxx>:
> >>  >> [ Adding linux-usb on CC. ]
> >>  >>
> >>  >> On Fri, Aug 17, 2018 at 10:41:20PM +0300, Алексей Болдырев wrote:
> >>  >>>  please add support to device from cdc-acm:
> >>  >>>
> >>  >>>  Bus 004 Device 003: ID 1782:3d00 Spreadtrum Communications Inc.
> >>  >>
> >>  >> Can you please post the output of "lsusb -v" for this device?
> >
> >>  Bus 004 Device 004: ID 1782:3d00 Spreadtrum Communications Inc.

[...]

> > Thanks for the details. This isn't a CDC device, so this probably needs
> > to be handled by a USB serial driver. What kind of device is it? Does it
> > have more than one port?
> >
> > Judging from the above you should get two ttyUSBx devices if you do:
> >
> >         # modprobe usbserial
> >         # echo 1782 3d00 > /sys/bus/usb-serial/drivers/generic/new_id
> >
> > as root.
> >
> > Are those two ports usable?

> I tried to do so, but for some reason I did not answer the serial
> port?

Ok, so the generic driver does not work. What kind of device is this? A
USB-serial adapter?

Do you have any way of figuring out what chip is used (e.g. an FTDI or
pl2303 chip?), for example, by opening the device?

Thanks,
Johan



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