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From: Johan Hovold <johan@kernel.org>
To: Anton Lundin <glance@acc.umu.se>
Cc: linux-usb@vger.kernel.org
Subject: Re: pl2303 converter detected, unknown device type
Date: Tue, 23 Nov 2021 09:59:19 +0100	[thread overview]
Message-ID: <YZytZ/vRioINvb14@hovoldconsulting.com> (raw)
In-Reply-To: <20211123083430.GA108031@montezuma.acc.umu.se>

On Tue, Nov 23, 2021 at 09:34:30AM +0100, Anton Lundin wrote:
> On 23 November, 2021 - Johan Hovold wrote:
> 
> > On Tue, Nov 23, 2021 at 08:16:13AM +0100, Anton Lundin wrote:
> > > I just picked up a new usb-rs232 adapter and was met by the following on
> > > a modern kernel:
> > > 
> > > # uname -r
> > > 5.16.0-rc2
> > > 
> > > usb 3-7: new full-speed USB device number 5 using xhci_hcd
> > > usb 3-7: New USB device found, idVendor=067b, idProduct=23a3, bcdDevice= 1.05
> > > usb 3-7: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> > > usb 3-7: Product: ATEN USB to Serial Bridge
> > > usb 3-7: Manufacturer: Prolific Technology Inc.
> > > pl2303 3-7:1.0: pl2303 converter detected
> > > pl2303 3-7:1.0: unknown device type, please report to linux-usb@vger.kernel.org
> > 
> > > I'm guessing it just needs a case for this bcdDevice.
> > 
> > Indeed, and thanks for reporting this. I'll add the missing entry.
> > 
> > Do you know what kind of PL2303 this is (e.g. PL2303GC)?
> 
> Sorry nope. The device is potted with some kind of opaque plastic, so I
> can see that there are two qfp's on the board, but not the numbers on
> them.

Ok, thanks for checking. Judging from the Prolific site the only G type
device that comes in a QFP type package appears to be PL2303GC.

> If there is some way of identifying the chip I can build a custom driver
> that can read out any information if that helps.

Thanks. Currently bcdDevice is the only known way to do this, but I may
get back to you on this later.

Let's assume it's a PL2303GC for now.

Johan

  reply	other threads:[~2021-11-23  9:01 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-23  7:16 pl2303 converter detected, unknown device type Anton Lundin
2021-11-23  8:13 ` Johan Hovold
2021-11-23  8:34   ` Anton Lundin
2021-11-23  8:59     ` Johan Hovold [this message]
2022-06-19  9:10 Giles Roadnight
2022-06-20  7:15 ` Johan Hovold

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