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/**
* \file
*
* \brief USB Device Human Interface Device (HID) interface.
*
* Copyright (c) 2009-2015 Atmel Corporation. All rights reserved.
*
* \asf_license_start
*
* \page License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name of Atmel may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 4. This software may only be redistributed and used in connection with an
* Atmel microcontroller product.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* \asf_license_stop
*
*/
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
*/
#include "conf_usb.h"
#include "usb_protocol.h"
#include "udd.h"
#include "udc.h"
#include "udi_hid.h"
/**
* \ingroup udi_hid_group
* \defgroup udi_hid_group_internal Implementation of HID common library
* @{
*/
/**
* \brief Send the specific descriptors requested by SETUP request
*
* \retval true if the descriptor is supported
*/
static bool udi_hid_reqstdifaceget_descriptor(uint8_t *report_desc);
bool udi_hid_setup( uint8_t *rate, uint8_t *protocol, uint8_t *report_desc, bool (*setup_report)(void) )
{
if (Udd_setup_is_in()) {
// Requests Interface GET
if (Udd_setup_type() == USB_REQ_TYPE_STANDARD) {
// Requests Standard Interface Get
switch (udd_g_ctrlreq.req.bRequest) {
case USB_REQ_GET_DESCRIPTOR:
return udi_hid_reqstdifaceget_descriptor(report_desc);
}
}
if (Udd_setup_type() == USB_REQ_TYPE_CLASS) {
// Requests Class Interface Get
switch (udd_g_ctrlreq.req.bRequest) {
case USB_REQ_HID_GET_REPORT:
return setup_report();
case USB_REQ_HID_GET_IDLE:
udd_g_ctrlreq.payload = rate;
udd_g_ctrlreq.payload_size = 1;
return true;
case USB_REQ_HID_GET_PROTOCOL:
udd_g_ctrlreq.payload = protocol;
udd_g_ctrlreq.payload_size = 1;
return true;
}
}
}
if (Udd_setup_is_out()) {
// Requests Interface SET
if (Udd_setup_type() == USB_REQ_TYPE_CLASS) {
// Requests Class Interface Set
switch (udd_g_ctrlreq.req.bRequest) {
case USB_REQ_HID_SET_REPORT:
return setup_report();
case USB_REQ_HID_SET_IDLE:
*rate = udd_g_ctrlreq.req.wValue >> 8;
return true;
case USB_REQ_HID_SET_PROTOCOL:
if (0 != udd_g_ctrlreq.req.wLength)
return false;
*protocol = udd_g_ctrlreq.req.wValue;
return true;
}
}
}
return false; // Request not supported
}
//---------------------------------------------
//------- Internal routines
static bool udi_hid_reqstdifaceget_descriptor(uint8_t *report_desc)
{
usb_hid_descriptor_t UDC_DESC_STORAGE *ptr_hid_desc;
// Get the USB descriptor which is located after the interface descriptor
// This descriptor must be the HID descriptor
ptr_hid_desc = (usb_hid_descriptor_t UDC_DESC_STORAGE *) ((uint8_t *)
udc_get_interface_desc() + sizeof(usb_iface_desc_t));
if (USB_DT_HID != ptr_hid_desc->bDescriptorType)
return false;
// The SETUP request can ask for:
// - an USB_DT_HID descriptor
// - or USB_DT_HID_REPORT descriptor
// - or USB_DT_HID_PHYSICAL descriptor
if (USB_DT_HID == (uint8_t) (udd_g_ctrlreq.req.wValue >> 8)) {
// USB_DT_HID descriptor requested then send it
udd_g_ctrlreq.payload = (uint8_t *) ptr_hid_desc;
udd_g_ctrlreq.payload_size =
min(udd_g_ctrlreq.req.wLength,
ptr_hid_desc->bLength);
return true;
}
// The HID_X descriptor requested must correspond to report type
// included in the HID descriptor
if (ptr_hid_desc->bRDescriptorType ==
(uint8_t) (udd_g_ctrlreq.req.wValue >> 8)) {
// Send HID Report descriptor given by high level
udd_g_ctrlreq.payload = report_desc;
udd_g_ctrlreq.payload_size =
min(udd_g_ctrlreq.req.wLength,
le16_to_cpu(ptr_hid_desc->wDescriptorLength));
return true;
}
return false;
}
//@}
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