From: David Brownell Date: Fri, 20 Jun 2008 01:20:26 +0000 (-0700) Subject: usb gadget: new "CDC Composite" gadget driver X-Git-Tag: v2.6.27-rc1~946^2~60 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19e2068015d4a66f62a0a19be2130d2948ba8024;p=pandora-kernel.git usb gadget: new "CDC Composite" gadget driver This is a simple example of a composite gadget, combining two Communications Class Device (CDC) functions: ECM and ACM. This provides a clear example of how the composite gadget framework is intended to work. It's surprising that MS-Windows (or at least, XP and previous) won't "just work" with something this simple... One /proc/bus/usb/devices listing looks like: T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 46 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=02(comm.) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=0525 ProdID=a4aa Rev= 3.01 S: Manufacturer=Linux 2.6.26-rc6-pnut with net2280 S: Product=CDC Composite Gadget C:* #Ifs= 4 Cfg#= 1 Atr=c0 MxPwr= 2mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=cdc_ether E: Ad=83(I) Atr=03(Int.) MxPS= 16 Ivl=32ms I: If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether I:* If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms I:* If#= 2 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=cdc_acm E: Ad=86(I) Atr=03(Int.) MxPS= 8 Ivl=32ms I:* If#= 3 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm E: Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms Not all USB peripheral controller hardware can support this driver. All the highspeed-capable peripheral controllers with drivers now in the mainline kernel seem to support this, as does omap_udc. But many full speed controllers don't have enough endpoints, or (as with the PXA controllers) don't support altsettings. Lightly tested. Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- Reading git-diff-tree failed