On Sun, 18 Aug 2013, Philippe wrote: > Hi, > > Last week I discovered the new configfs for the USB gadget support in > the kernel. > > I found the following threads on the mailing list: > https://lkml.org/lkml/2012/6/21/154 > https://lkml.org/lkml/2012/11/26/38 > > Now there is some discussion about having a userpace library to handle > the creation of all the necessary files easily. But I cannot find a > trace of it. Does it exist already? No mention of it has appeared on the mailing list. > If not I will need to write code for > it anyway to support it in the USB gadget handler daemon I maintain to > support this. It loads/unloads modules, sets up usb gadget modes, can > start programs needed etc ... (See usb_moded: > https://gitorious.org/meego-middleware/usb_moded ) > So if there is no code out there do handle the creation of those > configfs structures I do not mind doing the work. > > Also I have some questions about the documentation. In the section about > the gadget creation it states, I quote: > > "A gadget also needs its serial number, manufacturer and product strings. > In order to have a place to store them, a strings subdirectory must be > created > for each language, e.g.: > > $ mkdir strings/0x409" > > What is meant with language here, and why does the example have a hex > string as identifier. Are we rather talking about one of the USB > identifiers here? The word "language" refers to human languages, like English, French, Mandarin, and so on. The hex number is a language identifier, as specified by the USB Interface Forum: http://www.usb.org/developers/docs/ (see the paragraph near the end about LANGID codes). The strings are not USB identifiers; they are USB descriptors. > The rest seems to be pretty clear so I'll start playing around with it. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
