Re-enumerating a device

[Daniel O'Connor]

[ Please CC me as I'm not on list ]

Hi,
I have an M-Audio MobilePre, it's a USB audio module which works with 
snd_uadio, however to get it working I need to load the firwmare (via 
DFU).

Unfortunately the only way I can get it to re-enumerate after sending 
the firmware is to unplug it enough to disconnect the data lines (but 
not power) and then reconnect.

I have tried usbconfig reset, power_off/power_on, set_config and set_alt 
but to no avail..

[inchoate 16:46] ~/projects/dfu-util-0.1.snap20090212 >dfu-util -D ~/ma004103.bin -t 256
dfu-util - (C) 2007-2008 by OpenMoko Inc.
This program is Free Software and has ABSOLUTELY NO WARRANTY

Opening USB Device 0x0000:0x0000...
Claiming USB DFU Runtime Interface...
Determining device status: state = dfuIDLE, status = 0
WARNING: Runtime device already in DFU state ?!?
Found Runtime: [0x0763:0x2804] devnum=0, cfg=0, intf=0, alt=0, name="RAM"
Claiming USB DFU Interface...
Setting Alternate Setting ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
Transfer Size = 0x0100
bytes_per_hash=120
Starting download: [##################################################] finished!
state(7) = dfuMANIFEST, status(0) = No error condition is present
state(2) = dfuIDLE, status(0) = No error condition is present
Done!

From dmesg..
ugen0.2: <Unknown> at usbus0
# Run dfu-util
ugen0.2: <Unknown> at usbus0 (disconnected)
# Cause re-enumeratae
ugen0.2: <M Audio> at usbus0
uaudio0: <MobilePre> on usbus0
uaudio0: Play: 48000 Hz, 2 ch, 16-bit S-LE PCM format
uaudio0: Record: 48000 Hz, 2 ch, 16-bit S-LE PCM format
uaudio0: No midi sequencer
pcm1: <USB audio> on uaudio0

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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