USB_EP_CLEAR_HALT(9) Kernel Mode Gadget API USB_EP_CLEAR_HALT(9)NAME
usb_ep_clear_halt - clears endpoint halt, and resets toggle
int usb_ep_clear_halt(struct usb_ep * ep);
the bulk or interrupt endpoint being reset
Use this when responding to the standard usb "set interface" request, for endpoints that aren't reconfigured, after clearing any other
state in the endpoint's i/o queue.
Returns zero, or a negative error code. On success, this call clears the underlying hardware state reflecting endpoint halt and data
toggle. Note that some hardware can't support this request (like pxa2xx_udc), and accordingly can't correctly implement interface
David Brownell <email@example.com>
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 USB_EP_CLEAR_HALT(9)
Check Out this Related Man Page
USB_GADGET_CONFIG_BU(9) Kernel Mode Gadget API USB_GADGET_CONFIG_BU(9)NAME
usb_gadget_config_buf - builts a complete configuration descriptor
int usb_gadget_config_buf(const struct usb_config_descriptor * config, void * buf, unsigned length,
const struct usb_descriptor_header ** desc);
Header for the descriptor, including characteristics such as power requirements and number of interfaces.
Buffer for the resulting configuration descriptor.
Length of buffer. If this is not big enough to hold the entire configuration descriptor, an error code will be returned.
Null-terminated vector of pointers to the descriptors (interface, endpoint, etc) defining all functions in this device configuration.
This copies descriptors into the response buffer, building a descriptor for that configuration. It returns the buffer length or a negative
status code. The config.wTotalLength field is set to match the length of the result, but other descriptor fields (including power usage and
interface count) must be set by the caller.
Gadget drivers could use this when constructing a config descriptor in response to USB_REQ_GET_DESCRIPTOR. They will need to patch the
resulting bDescriptorType value if USB_DT_OTHER_SPEED_CONFIG is needed.
David Brownell <firstname.lastname@example.org>
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 USB_GADGET_CONFIG_BU(9)
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