[sane-devel] add support for ricoh aficio sp100su

[viruxx]

this printer/scanner model is not supported, so i give you the informations i
have about it
and my tests after compiling latest version of backends

lsusb gives :
Bus 002 Device 111: ID 05ca:042c Ricoh Co., Ltd 

sudo sane find scanner gives :
found USB scanner (vendor=0x05ca [RICOH], product=0x042c [Aficio SP 100SU])
at libusb:002:111

added in 40-libsane 
ATTRS{idVendor}=="05ca", ATTRS{idProduct}=="042c",
ENV{libsane_matched}="yes"

also tryed with 
ATTRS{idVendor}=="05ca", ATTRS{idProduct}=="042c", MODE="0664",
GROUP="scanner", ENV{libsane_matched}="yes"

ricoh.conf content is :
usb 0x05ca 0x042c

also tryed with [usb] 0x05ca 0x042c
tryed to add device auto
tryed to add device /dev/usbscanner

scanimage -L gives 
no sane device detected

scanimage -d ricoh:libusb:002:111 gives
scanimage: open of device ricoh:libusb:002:111 failed: Invalid argument

after unmounted the printer im able to give you the chip list
winbond w9812g6jh-6 1326w 63015m800
ia le-2 1ax00105s1996 1230 php8y700b cn
amm56219 070819 l/f asts1328ac
r4f24255vfpu n8s/2425 n 1338 aj02112
all that on a ua1310 version 2.0 mainboard
additionnal post-it show m1025005m 313100efd 2e tk9021441588d (1310)

firmware/drivers are here
http://support.ricoh.com/bb/html/dr_ut_e/apc/model/sp_100su/sp_100su.htm?lang=en

the back of the printer
sp100su e
serial t283mb73338
code m102-27



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