[PATCH][RFC] usbatm.[ch]: cleanup and OAM F5 loopback

Roman Kagan rkagan at mail.ru
Sun Mar 13 04:50:32 EST 2005

On Sat, Mar 12, 2005 at 11:10:03PM +0100, matthieu castet wrote:
> Well, may be it is the sagem that don't work well with bulk mode, but 
> when it is in high speed mode, if you reach a limit (200-300kb/s), the 
> modem produce lot's of error, and the atm data trame are broken (crc 
> error, bogus pdu_length, ...). So because of these errors, the modem 
> never reach the maximun rate.
> In iso rate it work at 700kb/s with no problem.

That's strange...  It is the iso transfers which are supposed to be
unreliable, as opposed to bulk.  I wonder if the errors happen in the
modem or in the host controller (e.g. VIA chipsets are said to often

BTW what do you call "high speed mode"?  Does it support USB 2.0 high
speed (480 Mbps)?


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