[sane-devel] Re: [linux-usb-devel] Yet another mail about libusb and scanner ;-)

[enine]

Hey I've got that one.  I'm using sane front and and sane backend and remember I had to patch both, so maybe (although I can't see why) you need to patch the sane front end?


---------- Original Message ----------------------------------
From: syrius.ml at no-log.org
Date:  Tue, 20 Apr 2004 18:02:51 +0200

>
>Hi,
>
>I'm trying to get my HP 4300C working.
>For that I'm using sane + the niash external backend.
>niash is compiled to work with libusb.
>
>here are some informations:
>
>debian sid + 2.6.5-mm6 kernel
>libsane is 1.0.13
>libusb is 0.1.8
>
>(atm all commands are run as root)
>
>After a fresh boot lsusb does not see the scanner.
>But it's present in /proc/bus/usb/device:
> T:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  5 Spd=12  MxCh= 0
> D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
> P:  Vendor=03f0 ProdID=0305 Rev= 0.00
> C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 48mA
> I:  If#= 0 Alt= 0 #EPs= 3 Cls=10(unk. ) Sub=01 Prot=00 Driver=(none)
> E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
> E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
> E:  Ad=83(I) Atr=03(Int.) MxPS=   1 Ivl=8ms
>
>After running 'scanimage -h', lsusb sees the scanner:
> Bus 002 Device 005: ID 03f0:0305 Hewlett-Packard ScanJet 4300c
>
>the result of scanimage is:
> scanimage: open of device niash:libusb:002:005 failed: Device busy
> List of available devices:
>    niash:libusb:002:005
>
>when i strace it, it shows:
> ioctl(6, USBDEVFS_SETCONFIGURATION, 0xbfffead4) = -1 EPROTO (Protocol
> error)
>and it doesn't produce a kernel error.
>
>running testtool (correctly compiled for libusb):
> # ./testtool
>  No NIASH chipset found!
>  _ProbeRegisters failed!
>
>stracing it shows a lot of:
> 21141 ioctl(4, USBDEVFS_CONTROL, 0xbffffa70) = -1 EPROTO (Protocol
> error)
>
>it does produce kernel errors:
> usbfs: USBDEVFS_CONTROL failed cmd testtool dev 5 rqt 64 rq 12 len 1
> ret -71
> usbfs: USBDEVFS_CONTROL failed cmd testtool dev 5 rqt 192 rq 12 len 1
> ret -71
>
>result of a 'SANE_DEBUG_SANEI_USB=255 scanimage -h' :
> [sanei_usb] sanei_usb_open: trying to open device `libusb:002:005'
> USB error: could not set config 1: Protocol error
> [sanei_usb] sanei_usb_open: libusb complained: could not set config 1:
>  Protocol error
> scanimage: open of device niash:libusb:002:005 failed: Device busy
>
>Any advice ?
>
>TIA
>
>-- 
>
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