packet status error of sl811h with at76c503a based usb wlan adapter

Hi,all

I'm using samsung 4510b mcu, running uClinux 2.4.20. My usb-host controller is sl811hst, and the usb-wlan card is accton ew3301, an Atmel AT76C503A based USB WLAN adapter with Intersil radio i3861. 

BTW, I'm using the adapter from http://at76c503a.berlios.de, v0.10, which worked very well on redhat linux 9.0.

but under uClinux, errors occured when  usbdfu.c Downloading firmware for USB device 2, dmesg is bellow:

CmpArm>1Uncompressing Linux............................................................ done, booting the kernel.
Linux version 2.4.20-uc0 (root@hansburg) (gcc version 2.95.3 20010315 (release)) #4 Wed Jul 30 17:02:43 CST 2003
Processor: Samsung S3C4510B revision 6
Architecture: SNDS100
The core registers' values are:
 SYSCFG=0xe7ffff96
 EXTDBWTH=0x5503002
 ROMCON0=0x1c060060
 DRAMCON0=0x8000301
 REFEXTCON=0x9c298360
 EXTACON0=0xea80000
 EXTACON1=0x0
 rIOPCON = 320
..

usb.c: registered new driver hub
usb.c: new USB bus registered, assigned bus number 1
hc_sl811.c: USB SL811 at 7604000, addr2 = 7605000, IRQ 1
Product: USB SL811HS Root Hub
SerialNumber: 0
hub.c: USB hub found
hub.c: 1 port detected
usbdfu.c: USB Device Fimware Upgrade (DFU) handler v0.10
usb.c: registered new driver usbdfu
at76c503.c: Generic Atmel at76c503/at76c505 routines v0.10
at76c503-i3861.c: Atmel at76c503 (Intersil 3861) Wireless LAN Driver v0.10
usb.c: registered new driver at76c503-i3861

..                                                                                                                                

/>dmesg				//plugged atmel usb-wlan in
/> hc_sl811.c: 	master,full speed
control registers of sl811h
addr:	00  01  02  03  04  05  06  07  08  09  10  11  12  13  14  15
value:	00  10  08  0c  00  01  31  00  00  11  37  00  37  92  20  8f
hub.c: new USB device sl811-1, assigned address 2
usbdfu.c: Downloading firmware for USB device 2...
usbdfu.c: do_dfu_download: ctx = 29f000
usbdfu.c: do_dfu_download:dfu_state = 2
hc_simple.c: sh_donw_list: done_list: packet err, cc=0x4,  urb->length=0x400, actual_len=0x88, urb_state=0x1
hc_simple.c: sh_donw_list: done_list: packet err, cc=0x4,  urb->length=0x400, actual_len=0x338, urb_state=0x1
usbdfu.c: do_dfu_download:dfu_state = 3
usbdfu.c: do_dfu_download:dfu_state = 5
  ...repeated many times...							//cc=0x4 means that the packet status is time-out
usbdfu.c: do_dfu_download:dfu_state = 6
usbdfu.c: do_dfu_download:dfu_state = 7

hc_simple.c: sh_donw_list: done_list: packet err, cc=0xc,  urb->length=0x0, actual_len=0x0, urb_state=0x2
hc_simple.c: sh_donw_list: done_list: packet err, cc=0xc,  urb->length=0x0, actual_len=0x0, urb_state=0x2
hc_simple.c: sh_donw_list: done_list: packet err, cc=0xc,  urb->length=0x0, actual_len=0x0, urb_state=0x2
hc_simple.c: sh_donw_list: done_list: excessive error: errcount = 0x4, cc = 0xc
     ...repeated many times...                      //cc=0xc means that the packet status is slave returns NAK and slave 													//set STALL bit
hc_simple.c: sh_donw_list: done_list: packet err, cc=0xc,  urb->length=0x12, actual_len=0x0, urb_state=0x2
hc_simple.c: sh_donw_list: done_list: packet err, cc=0xc,  urb->length=0x12, actual_len=0x0, urb_state=0x2
hc_simple.c: sh_donw_list: done_list: packet err, cc=0xc,  urb->length=0x12, actual_len=0x0, urb_state=0x2
hc_simple.c: sh_donw_list: done_list: excessive error: errcount = 0x4, cc = 0xc
hub.c: USB device descriptor short read (expected 18, got 0)
usb_interface_claimed !=0,goto out_err
/>


could anyone give me a hand? How can I survive? or how can i debug this bug?
Thanks alot!


Regards,

[email protected]