7.0 RC3 and usb problems

Jeremy Chadwick koitsu at freebsd.org
Tue Feb 26 05:47:24 UTC 2008


On Mon, Feb 25, 2008 at 05:59:27PM -0600, Paul Schmehl wrote:
> [root at utd65257 ~]# kldload umass
> kldload: can't load umass: File exists
> [root at utd65257 ~]# kldstat
> Id Refs Address    Size     Name
> 1    9 0xc0400000 906518   kernel
> 2    1 0xc0d07000 14324    snd_hda.ko
> 3    2 0xc0d1c000 4a5ac    sound.ko
> 4    1 0xc0d67000 6a32c    acpi.ko
> 5    1 0xc70a5000 22000    linux.ko
> [root at utd65257 ~]# kldunload umass
> kldunload: can't find file umass

This means umass support is built-in to the kernel.

> Doesn't make much sense to me.  I'm not very familiar with how the usb 
> system works, so I'm not sure where to look to find the problem.  There's 
> no /dev/umass either.

For umass devices to work, you need to have uhci (or ohci if your system
uses that USB bus type), ehci (for USB2.0), usb (obvious), and umass.
The kicker is that you also need scbus, da, and possibly pass.

-- 
| Jeremy Chadwick                                    jdc at parodius.com |
| Parodius Networking                           http://www.parodius.com/ |
| UNIX Systems Administrator                      Mountain View, CA, USA |
| Making life hard for others since 1977.                  PGP: 4BD6C0CB |



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