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usb_gadget_get_string
Langue: en
Version: October 2010 (fedora - 01/12/10)
Section: 9 (Appels noyau Linux)
NAME
usb_gadget_get_string - fill out a string descriptorSYNOPSIS
- int usb_gadget_get_string(struct usb_gadget_strings * table, int id, u8 * buf);
ARGUMENTS
table
- of c strings encoded using UTF-8
id
- string id, from low byte of wValue in get string descriptor
buf
- at least 256 bytes
DESCRIPTION
Finds the UTF-8 string matching the ID, and converts it into a string descriptor in utf16-le. Returns length of descriptor (always even) or negative errno
If your driver needs stings in multiple languages, you'll probably lqswitch (wIndex) { ... }rq in your ep0 string descriptor logic, using this routine after choosing which set of UTF-8 strings to use. Note that US-ASCII is a strict subset of UTF-8; any string bytes with the eighth bit set will be multibyte UTF-8 characters, not ISO-8859/1 characters (which are also widely used in C strings).
AUTHOR
David Brownell <dbrownell@users.sourceforge.net>
- Author.
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