suse man page for usb_get_descriptor

Query: usb_get_descriptor

OS: suse

Section: 9

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

USB_GET_DESCRIPTOR(9)						   USB Core APIs					     USB_GET_DESCRIPTOR(9)

NAME
usb_get_descriptor - issues a generic GET_DESCRIPTOR request
SYNOPSIS
int usb_get_descriptor(struct usb_device * dev, unsigned char type, unsigned char index, void * buf, int size);
ARGUMENTS
dev the device whose descriptor is being retrieved type the descriptor type (USB_DT_*) index the number of the descriptor buf where to put the descriptor size how big is "buf"?
CONTEXT
!in_interrupt ()
DESCRIPTION
Gets a USB descriptor. Convenience functions exist to simplify getting some types of descriptors. Use usb_get_string or usb_string for USB_DT_STRING. Device (USB_DT_DEVICE) and configuration descriptors (USB_DT_CONFIG) are part of the device structure. In addition to a number of USB-standard descriptors, some devices also use class-specific or vendor-specific descriptors. This call is synchronous, and may not be used in an interrupt context. Returns the number of bytes received on success, or else the status code returned by the underlying usb_control_msg call.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 USB_GET_DESCRIPTOR(9)
Related Man Pages
usb_set_interface(9) - suse
usb_parse_data(9f) - opensolaris
usb_gadget_config_buf(9) - suse
usb_string_descr(9s) - sunos
usb_template(4) - freebsd
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