[PATCH] Add CDC ACM Modem

[Daniel Qarras]

Hi,

this is my third and last attempt on this. The attached patch add
support for CDC ACM modems, typically provided by GSM/CDMA phones.

Background: it turned out while testing a Nokia CA-42 cable with a GSM
phone and NetworkManager that the cable can actually support CDMA
phones, too (1). After few iterations it was suggested by Alex that
these kind of cables should be marked as general V.250 modems (2).
Applications can then use AT commands to find out whether the device is
GSM, CDMA, or what else. However, it was also pointed out that David is
working on a "probing feature" (3) which I'm unaware of, so please
consider that aspect before applying the patch.

1) http://lists.freedesktop.org/archives/hal/2008-March/011151.html
2) http://lists.freedesktop.org/archives/hal/2008-April/011382.html
3) http://lists.freedesktop.org/archives/hal/2008-April/011385.html

As said, this is my last attempt on this one. Thanks.





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