Hello,
I have a no-name USB mp3 player coming with 128 MB.
Vendor: Winbond Electronics Corp. 0x0416
Product: CT986 0xc986
It works fine under windows: sometimes data corruption will occur, but
that remains rare and reading/writing speed is decent.
Pluging it the first time under linux didn't work at all. A lot of
errors like "SCSI error : <0 0 0 0> return code = 0x10070000".
Partition table wasn't recognized at all.
It was natively not working with kernel 2.6.11, so I decided to hack
the unusual_devs.h. I added those line:
UNUSUAL_DEV(0x0416, 0xc986, 0x0100, 0x0100,
"Winbond Electronics Corp.",
"CT986",
US_SC_DEVICE,
US_PR_BULK,
NULL,
US_FL_IGNORE_RESIDUE | US_FL_FIX_INQUIRY | US_FL_NEED_OVERRIDE),
All switches are required, device seems to accept only Bulk according
to the Windows driver.
Adding those lines helped a lot: key is recognized correctly (sda1), and
reading files is fine.
However, writing always fails, with such error messages (tons of them):
SCSI error : <0 0 0 0> return code = 0x10070000
end_request: I/O error, dev sda, sector 400
Buffer I/O error on device sda1, logical block 0
(sector and logical block changing in each message).
I tried to add the "sync" option in the fstab, and it wil copy files,
but for no more than 2048 bytes.
I tried to decrease the max_sectors to 8, helped only for littles
files. Bigger files will be corrupted.
I tried latest patch regarding ignoring residue for read and write
operations, it somehow helped as all those error message are gone and
files are copied without problem, but it is horribly slow (transfer
rate around 20 kb/s at best), which makes mp3 transfers a real pain.
Any idea ? Will 2.6.12 provide a solution ?
Here's lsusb result:
Bus 001 Device 008: ID 0416:c986 Winbond Electronics Corp.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 16
idVendor 0x0416 Winbond Electronics Corp.
idProduct 0xc986
bcdDevice 1.00
iManufacturer 0
iProduct 2 CT986
iSerial 1
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 39
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
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
wMaxPacketSize 64
bInterval 255
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type none
wMaxPacketSize 64
bInterval 255
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type none
wMaxPacketSize 8
bInterval 1
Language IDs: (length=4)
0409 English(US)
--
Grégory SCHMITT <mailto:[EMAIL PROTECTED]>
-------------------------------------------------------
This SF.Net email is sponsored by: NEC IT Guy Games.
Get your fingers limbered up and give it your best shot. 4 great events, 4
opportunities to win big! Highest score wins.NEC IT Guy Games. Play to
win an NEC 61 plasma display. Visit http://www.necitguy.com/?r
_______________________________________________
linux-usb-devel@lists.sourceforge.net
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
