[sane-devel] Genesys - CanoScan 8400F (pt2)

[Brian J Densmore]

My investigation of the CanoScan 8400F has so far found the following.


cat /proc/bus/usb/devices :

...
T:  Bus=01 Lev=01 Prnt=01 Port=05 Cnt=01 Dev#= 29 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS=64 #Cfgs=  1
P:  Vendor=04a9 ProdID=221e Rev= 4.00
S:  Manufacturer=Canon
S:  Product=CanoScan
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 10mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=83(I) Atr=03(Int.) MxPS=   1 Ivl=16ms

sane-find-scanner output:
...
<device descriptor of 0x04a9/0x221e at 001:029 (Canon CanoScan)>
bLength               18
bDescriptorType       1
bcdUSB                2.00
bDeviceClass          255
bDeviceSubClass       255
bDeviceProtocol       255
bMaxPacketSize0       64
idVendor              0x04A9
idProduct             0x221E
bcdDevice             4.00
iManufacturer         1 (Canon)
iProduct              2 (CanoScan)
iSerialNumber         0 ()
bNumConfigurations    1
<configuration 0>
bLength              9
bDescriptorType      2
wTotalLength         39
bNumInterfaces       1
bConfigurationValue  1
iConfiguration       0 ()
bmAttributes         192 (Self-powered)
MaxPower             10 mA
<interface 0>
 <altsetting 0>
 bLength            9
 bDescriptorType    4
 bInterfaceNumber   0
 bAlternateSetting  0
 bNumEndpoints      3
 bInterfaceClass    255
 bInterfaceSubClass 255
 bInterfaceProtocol 255
 iInterface         0 ()
  <endpoint 0>
  bLength           7
  bDescriptorType   5
  bEndpointAddress  0x81 (in 0x01)
  bmAttributes      2 (bulk)
  wMaxPacketSize    512
  bInterval         0 ms
  bRefresh          0
  bSynchAddress     0
  <endpoint 1>
  bLength           7
  bDescriptorType   5
  bEndpointAddress  0x02 (out 0x02)
  bmAttributes      2 (bulk)
  wMaxPacketSize    512
  bInterval         0 ms
  bRefresh          0
  bSynchAddress     0
  <endpoint 2>
  bLength           7
  bDescriptorType   5
  bEndpointAddress  0x83 (in 0x03)
  bmAttributes      3 (interrupt)
  wMaxPacketSize    1
  bInterval         8 ms
  bRefresh          0
  bSynchAddress     0

<trying to find out which USB chip is used>
  ...
  checking for GL646 ...
  this is not a GL646 (bDeviceClass = 255, bInterfaceClass = 255)
  checking for GL646_HP ...
  this is not a GL646_HP (bcdUSB = 0x200)
  checking for GL660+GL646 ...
  this is not a GL660+GL646 (bDeviceClass = 255, bInterfaceClass = 255)
  checking for GL841 ...
<This USB chip looks like a GL841>

found USB scanner (vendor=0x04a9 [Canon], product=0x221e [CanoScan], 
chip=GL841) at libusb:001:029
...


Brian JD