usbboot in EPIA-5000

[elife elife]

Hi,
  I am trying to use baremetal/usbboot in EPIA-5000(I use the newest cvs of 
freebios) but fail: I only got endless "BOUNCE!". I check the code and see 
in uhci.c

                        for(i=0; i<40; i++) {
                                udelay(10000+usec_offset);
                                value = inw(port);
                                if(value & 0x02) {
                                        outw(value, port);
                                        i=0;
                                        DPRINTF("BOUNCE!\n");
                                }
                        }
  What does this means and what should I do? The usb can work when I use 
lb+eb+kernel.

  Below is the log.

Best Regards!


Loading 192.168.2.157:usbboot.elf ...(ELF)... 
About to prepare segment [02000000,020280F0)
........................done
rhine disable
LinuxLabs USB bootloader
Found LinuxBIOS table at: 500
raw frame_list is at 02020020
frame_list is at 02021000
frame_list_link: addr: 0201f030
frame_list_link:  raw addr: 0201f030
frame_list_link: terminate: 0
frame_list_link: queue: 1
frame_list_link: depth: 0
dummy_td = 02016fc0
raw frame_list is at 02022020
frame_list is at 02023000
frame_list_link: addr: 0201f050
frame_list_link:  raw addr: 0201f050
frame_list_link: terminate: 0
frame_list_link: queue: 1
frame_list_link: depth: 0
dummy_td = 02017000
raw frame_list is at 02024020
frame_list is at 02025000
frame_list_link: addr: 0201f070
frame_list_link:  raw addr: 0201f070
frame_list_link: terminate: 0
frame_list_link: queue: 1
frame_list_link: depth: 0
dummy_td = 02017040
raw frame_list is at 02026020
frame_list is at 02027000
frame_list_link: addr: 0201f090
frame_list_link:  raw addr: 0201f090
frame_list_link: terminate: 0
frame_list_link: queue: 1
frame_list_link: depth: 0
dummy_td = 02017080
Found UHCI at fffe
Resetting UHCI
clocks_per_usec: 640
hc_init setting framelist to: 02021000
Starting UHCI
UHCI at fffe
Found UHCI at fffe
Resetting UHCI
hc_init setting framelist to: 02023000
Starting UHCI
UHCI at fffe
Found UHCI at fffe
Resetting UHCI
hc_init setting framelist to: 02025000
Starting UHCI
UHCI at fffe
Connection on port 0010
BOUNCE!
BOUNCE!
......

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