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From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-usb@freebsd.org
Date: Sun, 3 Oct 2010 10:19:20 +0200
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Subject: Re: ...but this USB device is more than a printer!
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On Sunday 03 October 2010 01:19:18 dan wrote:
> Hi all,
> 
> I'll go straight to the point.
> Here's  the output from "usbconfig dump_device_desc"
> 
> #*
> ugen0.3: <Samsung SCX-4100 Series Samsung> at usbus0, cfg=0 md=HOST
> spd=FULL (12Mbps) pwr=ON
> 
>    bLength = 0x0012
>    bDescriptorType = 0x0001
>    bcdUSB = 0x0110
>    bDeviceClass = 0x0000
>    bDeviceSubClass = 0x0000
>    bDeviceProtocol = 0x0000
>    bMaxPacketSize0 = 0x0008
>    idVendor = 0x04e8
>    idProduct = 0x3413
>    bcdDevice = 0x0100
>    iManufacturer = 0x0001  <Samsung>
>    iProduct = 0x0002  <Samsung SCX-4100 Series>
>    iSerialNumber = 0x0003  <8J21BAKYB28091W.>
>    bNumConfigurations = 0x0001
> #*
> 
> and here's the output from "usbconfig dump_curr_config_desc"
> 
> #*
> ugen0.3: <Samsung SCX-4100 Series Samsung> at usbus0, cfg=0 md=HOST
> spd=FULL (12Mbps) pwr=ON
> 
> 
>   Configuration index 0
> 
>      bLength = 0x0009
>      bDescriptorType = 0x0002
>      wTotalLength = 0x0020
>      bNumInterfaces = 0x0001
>      bConfigurationValue = 0x0001
>      iConfiguration = 0x0000  <no string>
>      bmAttributes = 0x00c0
>      bMaxPower = 0x0000
> 
>      Interface 0
>        bLength = 0x0009
>        bDescriptorType = 0x0004
>        bInterfaceNumber = 0x0000
>        bAlternateSetting = 0x0000
>        bNumEndpoints = 0x0002
>        bInterfaceClass = 0x0007
>        bInterfaceSubClass = 0x0001
>        bInterfaceProtocol = 0x0002
>        iInterface = 0x0000  <no string>
> 
>       Endpoint 0
>          bLength = 0x0007
>          bDescriptorType = 0x0005
>          bEndpointAddress = 0x0003  <OUT>
>          bmAttributes = 0x0002  <BULK>
>          wMaxPacketSize = 0x0040
>          bInterval = 0x0000
>          bRefresh = 0x0000
>          bSynchAddress = 0x0000
> 
>       Endpoint 1
>          bLength = 0x0007
>          bDescriptorType = 0x0005
>          bEndpointAddress = 0x0081  <IN>
>          bmAttributes = 0x0002  <BULK>
>          wMaxPacketSize = 0x0040
>          bInterval = 0x0000
>          bRefresh = 0x0000
>          bSynchAddress = 0x0000
> #*
> 
> Userland software, such as sane-find-scanner, is currently sure this is
> is just a printer. I would like this device to introduce itself for what
> it is ... a printer + a color scanner.
> Is it feasible? Are there any well-established techniques to (try to)
> reach the goal?
> 
> Thanks for any link/suggestion
> 

Hi,

Maybe you have to switch some button on the printer. Only one driver can use a 
set of IN and OUT endpoints at a time in an interface. Maybe the original 
driver has a multiplexer on top?

--HPS