Hello,
I have recently purchased a card-reader/floppy combo produced by
Mitsumi, and found out that under Linux it exhibits the behaviour
described at http://bugme.osdl.org/show_bug.cgi?id=3223.
Accordingly, I wrote a new entry in the unusual_devs.h file and now
the device is working flawlessly. The (really short) patch follows:
=====[usb-storage-patch]=====
--- drivers/usb/storage/unusual_devs.h.old 2005-07-19 18:36:17.000000000
+0300
+++ drivers/usb/storage/unusual_devs.h 2005-07-19 19:27:49.000000000 +0300
@@ -79,6 +79,13 @@ UNUSUAL_DEV( 0x03f0, 0x0307, 0x0001, 0x
US_SC_8070, US_PR_SCM_ATAPI, init_usbat, 0),
#endif
+/* Patch submitted by Mihnea-Costin Grigore <[EMAIL PROTECTED]> */
+UNUSUAL_DEV( 0x040d, 0x6205, 0x0000, 0xFFFF,
+ "VIA Technologies Inc.",
+ "USB 2.0 Card Reader",
+ US_SC_DEVICE, US_PR_DEVICE, NULL,
+ US_FL_IGNORE_RESIDUE ),
+
/* Deduced by Jonathan Woithe <[EMAIL PROTECTED]>
* Entry needed for flags: US_FL_FIX_INQUIRY because initial inquiry message
* always fails and confuses drive.
=====[end usb-storage-patch]=====
As you can see, I was unable to deduce the bcdDeviceMin/Max values so
I entered the whole range there (previously tried with 0x0100 and 0x0001
like other entries in the file, but it didn't work). Maybe you can tell me
where that value is found (and how to convert it to hex) from the
following output (is it the bcdDevice 0.03 line?):
=====[lsusb -v]=====
Bus 005 Device 004: ID 040d:6205 VIA Technologies, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x040d VIA Technologies, Inc.
idProduct 0x6205
bcdDevice 0.03
iManufacturer 1 VIA Technologies Inc.
iProduct 2 USB 2.0 Card Reader
iSerial 3 000000081640
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 bytes 512 once
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 0x0200 bytes 512 once
bInterval 1
=====[end lsusb -v]=====
=====[cat /proc/bus/usb/devices]=====
T: Bus=05 Lev=01 Prnt=01 Port=06 Cnt=01 Dev#= 4 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=040d ProdID=6205 Rev= 0.03
S: Manufacturer=VIA Technologies Inc.
S: Product=USB 2.0 Card Reader
S: SerialNumber=000000081640
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=125us
=====[end cat /proc/bus/usb/devices]=====
=====[cat /proc/scsi/usb-storage/2]=====
Host scsi2: usb-storage
Vendor: VIA Technologies Inc.
Product: USB 2.0 Card Reader
Serial Number: 000000081640
Protocol: Transparent SCSI
Transport: Bulk
Quirks: IGNORE_RESIDUE
=====[cat /proc/scsi/usb-storage/2]=====
I should point out that the problem appeared only on the secondary
card slot (enabled by echo "scsi add-single-device 2 0 0 1" >
/proc/scsi/scsi), the first one was working perfectly without this patch.
With the patch, both slots work -- it is even possible to transfer files
between them...
Thanks for the great work,
Best regards,
--
Mihnea-Costin Grigore
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