Another PL2303

Another PL2303

[Matyáš Kroupa]

Hi,

I recently bought a serial console adapter with PL2303. After a quick 
search I discovered that there have been problems with different 
versions of this chip so I include some info about mine.

Thanks in advance

Matyáš

dmesg:

[172076.820388] usb 3-2.2: new full-speed USB device number 11 using 
xhci_hcd
[172076.960358] usb 3-2.2: New USB device found, idVendor=067b, 
idProduct=23f3, bcdDevice= 6.05
[172076.960372] usb 3-2.2: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[172076.960377] usb 3-2.2: Product: USB-Serial Controller
[172076.960381] usb 3-2.2: Manufacturer: Prolific Technology Inc.
[172076.960384] usb 3-2.2: SerialNumber: CCBLj19B616
[172077.038242] usbcore: registered new interface driver pl2303
[172077.038251] usbserial: USB Serial support registered for pl2303
[172077.038269] pl2303 3-2.2:1.0: pl2303 converter detected
[172077.038273] pl2303 3-2.2:1.0: unknown device type, please report to 
linux-usb@vger.kernel.org

lsusb:

Bus 003 Device 011: ID 067b:23f3 Prolific Technology, Inc. USB-Serial 
Controller
Couldn't open device, some information will be missing
Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               2.00
   bDeviceClass            0
   bDeviceSubClass         0
   bDeviceProtocol         0
   bMaxPacketSize0        64
   idVendor           0x067b Prolific Technology, Inc.
   idProduct          0x23f3
   bcdDevice            6.05
   iManufacturer           1 Prolific Technology Inc.
   iProduct                2 USB-Serial Controller
   iSerial                 3 CCBLj19B616
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength       0x0027
     bNumInterfaces          1
     bConfigurationValue     1
     iConfiguration          0
     bmAttributes         0xa0
       (Bus Powered)
       Remote Wakeup
     MaxPower              100mA
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        0
       bAlternateSetting       0
       bNumEndpoints           3
       bInterfaceClass       255 Vendor Specific Class
       bInterfaceSubClass      0
       bInterfaceProtocol      0
       iInterface              0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x81  EP 1 IN
         bmAttributes            3
           Transfer Type            Interrupt
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x000a  1x 10 bytes
         bInterval               1
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x02  EP 2 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0040  1x 64 bytes
         bInterval               0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x83  EP 3 IN
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0040  1x 64 bytes
         bInterval               0

Re: Another PL2303

[Johan Hovold]

On Sun, Mar 06, 2022 at 05:52:58PM +0100, Matyáš Kroupa wrote:
> Hi,
> 
> I recently bought a serial console adapter with PL2303. After a quick 
> search I discovered that there have been problems with different 
> versions of this chip so I include some info about mine.

Thanks for the report and for including all the necessary details.

> dmesg:
> 
> [172076.820388] usb 3-2.2: new full-speed USB device number 11 using 
> xhci_hcd
> [172076.960358] usb 3-2.2: New USB device found, idVendor=067b, 
> idProduct=23f3, bcdDevice= 6.05

Based on the (default) product id this should be a PL2303GS. Are you
able to confirm that by looking at markings on the chip too?

Either way, I just posted a patch that adds this bcdDevice to the
driver.

Johan

Re: Another PL2303

[Matyáš Kroupa]

Yes, it is PL2023GS. I wasn't able to read it but now that I know what 
to look for, I can confirm it.

Matyáš

Dne 07. 03. 22 v 15:29 Johan Hovold napsal(a):
> On Sun, Mar 06, 2022 at 05:52:58PM +0100, Matyáš Kroupa wrote:
>> Hi,
>>
>> I recently bought a serial console adapter with PL2303. After a quick
>> search I discovered that there have been problems with different
>> versions of this chip so I include some info about mine.
> Thanks for the report and for including all the necessary details.
>
>> dmesg:
>>
>> [172076.820388] usb 3-2.2: new full-speed USB device number 11 using
>> xhci_hcd
>> [172076.960358] usb 3-2.2: New USB device found, idVendor=067b,
>> idProduct=23f3, bcdDevice= 6.05
> Based on the (default) product id this should be a PL2303GS. Are you
> able to confirm that by looking at markings on the chip too?
>
> Either way, I just posted a patch that adds this bcdDevice to the
> driver.
>
> Johan

Re: Another PL2303

[Johan Hovold]

On Mon, Mar 07, 2022 at 03:38:39PM +0100, Matyáš Kroupa wrote:
> Yes, it is PL2023GS. I wasn't able to read it but now that I know what 
> to look for, I can confirm it.

Perfect, thanks again!

Johan