struct usb_ctrlrequest {
__u8 bRequestType;
__u8 bRequest;
__u16 wValue;
__u16 wIndex;
__u16 wLength;
};
This structure is used to send control requests to a USB device. It matches the different fields of the USB 2.0 Spec section 9.3, table 9-2. See the USB spec for a fuller description of the different fields, and what they are used for.
Note that the driver for any interface can issue control requests. For most devices, interfaces don't coordinate with each other, so such requests may be made at any time.
Permission is granted to copy, distribute, and/or modify this document under the terms of the GNU Free Documentation License, version 1.2, or any later version published by the Free Software Foundation; with the Invariant Sections being the "GNU Free Documentation License", no Front-Cover Texts, and no Back-Cover Texts.
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Free Documentation License for more details.
Note that certain sections of this document are merged into Linux kernel source code. That content is the bulk of [XRef to CORE]> and [XRef to UTILS]>, where the "GNU Free Documentation License" is identified as an alternate licence for its documentation.
If you have comments on the formatting of this manpage, then please contact Michael Still (mikal@stillhq.com).
This documentation was generated with kernel version 2.5.73.