USB_GADGET_CLEAR_SEL(9) Kernel Mode Gadget API USB_GADGET_CLEAR_SEL(9)NAME
usb_gadget_clear_selfpowered - clear the device selfpowered feature.
SYNOPSIS
int usb_gadget_clear_selfpowered(struct usb_gadget * gadget);
ARGUMENTS
gadget
the device being declared as bus-powered
DESCRIPTION
this affects the device status reported by the hardware driver. some hardware may not support bus-powered operation, in which case this
feature's value can never change.
returns zero on success, else negative errno.
AUTHOR
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 USB_GADGET_CLEAR_SEL(9)
Check Out this Related Man Page
STRUCT USB_COMPOSITE(9) Kernel Mode Gadget API STRUCT USB_COMPOSITE(9)NAME
struct_usb_composite_dev - represents one composite usb gadget
SYNOPSIS
struct usb_composite_dev {
struct usb_gadget * gadget;
struct usb_request * req;
unsigned bufsiz;
struct usb_configuration * config;
};
MEMBERS
gadget
read-only, abstracts the gadget's usb peripheral controller
req
used for control responses; buffer is pre-allocated
bufsiz
size of buffer pre-allocated in req
config
the currently active configuration
DESCRIPTION
One of these devices is allocated and initialized before the associated device driver's bind is called.
OPEN ISSUE
it appears that some WUSB devices will need to be built by combining a normal (wired) gadget with a wireless one. This revision of the
gadget framework should probably try to make sure doing that won't hurt too much.
ONE NOTION FOR HOW TO HANDLE WIRELESS USB DEVICES INVOLVES
(a) a second gadget here, discovery mechanism TBD, but likely needing separate "register/unregister WUSB gadget" calls; (b) updates to
usb_gadget to include flags "is it wireless", "is it wired", plus (presumably in a wrapper structure) bandgroup and PHY info; (c)
presumably a wireless_ep wrapping a usb_ep, and reporting wireless-specific parameters like maxburst and maxsequence; (d) configurations
that are specific to wireless links; (e) function drivers that understand wireless configs and will support wireless for (additional)
function instances; (f) a function to support association setup (like CBAF), not necessarily requiring a wireless adapter; (g) composite
device setup that can create one or more wireless configs, including appropriate association setup support; (h) more, TBD.
AUTHOR
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 STRUCT USB_COMPOSITE(9)
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