NAME¶

usb_gadget_get_string - fill out a string descriptor

SYNOPSIS¶

int usb_gadget_get_string(struct usb_gadget_strings * table, int id, u8 * buf);

ARGUMENTS¶

table

id

buf

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 “switch (wIndex) { ... }” 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>

COPYRIGHT¶