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