usbboot in EPIA-5000

[Steven James]

Greetings,

bit 2 of that port flags a cionnect status change (something connected or
disconnected). BOUNCE means that the the root hub is continually reporting
a connect and disconnect in a short time.

That's not uncommon in some hardware status and is known as a bounce.

In this case, it's more likely that something isn't set up properly and
the port is reading 0xffff which confuses the code.

That code is/was more than a bit rough around the edges. You might want to
look at filo+etherboot. Yinghai Lu merged the USB boot code into that, did
a LOT of cleanup, and added OHCI support.

G'day,
sjames



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   Steven James, CTO

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On Mon, 6 Sep 2004, elife elife wrote:

>
> 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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