From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <b04b9cbc1fbba7eeacdbf3fbc70d4111@hera.eonet.ne.jp>
To: 9fans@9fans.net
Date: Wed,  4 Feb 2009 19:57:43 +0900
From: kokamoto@hera.eonet.ne.jp
MIME-Version: 1.0
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Subject: Re: [9fans] usb problem of Asus P5K-VM motherboard
Topicbox-Message-UUID: 9535dd98-ead4-11e9-9d60-3106f5b1d025

> my P5K-VM machine's pci output is as follows:
> 0.26.0:	usb  0c.03.00 8086/2937  10 4:0000c481 32
> 0.26.1:	usb  0c.03.00 8086/2938   3 4:0000c801 32
> 0.26.2:	usb  0c.03.00 8086/2939   5 4:0000c881 32
> 0.29.0:	usb  0c.03.00 8086/2934   5 4:0000c001 32
> 0.29.1:	usb  0c.03.00 8086/2935  10 4:0000c081 32
> 0.29.2:	usb  0c.03.00 8086/2936   5 4:0000c401 32

I debugged the devusv.c usbuhci.c in /sys/src/9/pc, and got the
following result, where I'm confused why the b=0x0 value of the last line.
If this is true it would write to 0!, and system hungs.   It's very
reasonable, but why we get b=0x0 at dumptd()...

Anyway the debugging outputs after I plugined a usb disk are:

e: 95
r: 95
r2: 280
r3: 80
r: 95 0
e: 95
speed 1
out [8] 80 06 00 01 00 00 08 00
queuetd qxmit: t=f0047080 lt=f0047080 q=f0048080 first=0 last=0 entries=00000001
	t=f0047080 q=f0048080 first=f0047080 last=f0047080 entries=00047080
qh 0xf0048080: 0x480c2 0x1
qh 0xf00480c0: 0x480e2 0x1
qh 0xf00480e0: 0x480a2 0x1
qh 0xf00480a0: 0x1 0x47060
td 0xf0047060: l=0x47060 s=0x0 d=0x0 b=0x0 0x0 f=0x0
	s=,ep=0,d=0,D=0

here stalls.

The functions used are:
  portenable()-->portreset()-->portenable()-->write()-->qxmit()-->queuetd()
	-->dumpqh()-->dumptd()

I touched some on usb device long time ago, and now forgot all
because of my aging efect.

If someone point me the place reporting wrong values, please
let me know it.

Thanks inadvance

Kenji