hiddtransferdriver.c

本代bootloader通过usb下载代码首先存放在sdram中

/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
 * ----------------------------------------------------------------------------
 * Copyright (c) 2008, Atmel Corporation
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: 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
 * 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.
 * ----------------------------------------------------------------------------
 */

//------------------------------------------------------------------------------
//         Headers
//------------------------------------------------------------------------------

#include "HIDDTransferDriver.h"
#include "HIDDTransferDriverDesc.h"
#include <utility/trace.h>
#include <usb/common/core/USBGetDescriptorRequest.h>
#include <usb/common/hid/HIDGenericDescriptor.h>
#include <usb/common/hid/HIDDescriptor.h>
#include <usb/common/hid/HIDGenericRequest.h>
#include <usb/common/hid/HIDReportRequest.h>
#include <usb/device/core/USBD.h>
#include <usb/device/core/USBDDriver.h>

#include <string.h>

//------------------------------------------------------------------------------
//         Internal types
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// Driver structure for an HID device implementing keyboard functionalities.
//------------------------------------------------------------------------------
typedef struct {

    /// Standard USB device driver instance.
    USBDDriver usbdDriver;

    // OUT Report - block input
    unsigned short iReportLen;
    unsigned char  iReportBuf[HIDDTransferDriver_REPORTSIZE];

    // Interrupt OUT Data - input
    /// Input data length
    unsigned short iLen;
    /// Input (report) Buffer
    unsigned char iBuf[HIDDTransferDriver_REPORTSIZE];

    // Nothing more now...

} HIDDTransferDriver;

//------------------------------------------------------------------------------
//         Internal variables
//------------------------------------------------------------------------------

/// Static instance of the HID Transfer device driver.
static HIDDTransferDriver hiddTransferDriver;

//------------------------------------------------------------------------------
//         Internal functions
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// Returns the descriptor requested by the host.
/// \param type Descriptor type.
/// \param length Maximum number of bytes to send.
/// \return 1 if the request has been handled by this function, otherwise 0.
//------------------------------------------------------------------------------
static unsigned char HIDDTransferDriver_GetDescriptor(unsigned char type,
                                                      unsigned char length)
{
    const USBConfigurationDescriptor *pConfiguration;
    HIDDescriptor *hidDescriptor;

    switch (type) {

        case HIDGenericDescriptor_REPORT:
            TRACE_INFO("Report ");

            // Adjust length and send report descriptor
            if (length > HIDDTransferDriverDescriptors_REPORTSIZE) {

                length = HIDDTransferDriverDescriptors_REPORTSIZE;
            }
            USBD_Write(0, &hiddReportDescriptor, length, 0, 0);
            break;

        case HIDGenericDescriptor_HID:
            TRACE_INFO("HID ");

            // Configuration descriptor is different depending on configuration
            if (USBD_IsHighSpeed()) {

                pConfiguration =
                   hiddTransferDriver.usbdDriver.pDescriptors->pHsConfiguration;
            }
            else {

                pConfiguration =
                   hiddTransferDriver.usbdDriver.pDescriptors->pFsConfiguration;
            }

            // Parse the device configuration to get the HID descriptor
            USBConfigurationDescriptor_Parse(pConfiguration, 0, 0,
                                     (USBGenericDescriptor **) &hidDescriptor);

            // Adjust length and send HID descriptor
            if (length > sizeof(HIDDescriptor)) {

                length = sizeof(HIDDescriptor);
            }
            USBD_Write(0, hidDescriptor, length, 0, 0);
            break;

        default:
            return 0;
    }

    return 1;
}

//------------------------------------------------------------------------------
/// Callback function when SetReport request data received from host
/// \param pArg Pointer to additional argument struct
/// \param status Result status
/// \param transferred Number of bytes transferred
/// \param remaining Number of bytes that are not transferred yet
//------------------------------------------------------------------------------
static void HIDDTransferDriver_ReportReceived(void *pArg,
                                              unsigned char status,
                                              unsigned int transferred,
                                              unsigned int remaining)
{
    hiddTransferDriver.iReportLen = transferred;
    USBD_Write(0, 0, 0, 0, 0);
}

//------------------------------------------------------------------------------
/// Callback function when interrupt OUT data received from host
/// \param pArg Pointer to additional argument
/// \param status Result status
/// \param transferred Number of bytes transferred
/// \param remaining Number of bytes that are not transferred yet
//------------------------------------------------------------------------------
static void HIDDTransferDriver_DataReceived(void *pArg,
                                            unsigned char status,
                                            unsigned int transferred,
                                            unsigned int remaining)
{
    hiddTransferDriver.iLen = transferred;

    USBD_Read(HIDDTransferDriverDescriptors_INTERRUPTOUT,
              hiddTransferDriver.iBuf,
              HIDDTransferDriver_REPORTSIZE,
              (TransferCallback)HIDDTransferDriver_DataReceived,
              0);
}

//------------------------------------------------------------------------------
//         Optional RequestReceived() callback re-implementation
//------------------------------------------------------------------------------
#if !defined(NOAUTOCALLBACK)

//------------------------------------------------------------------------------
/// Callback function when new request receivce from host
/// \param request Pointer to the USBGenericRequest instance
//------------------------------------------------------------------------------
void USBDCallbacks_RequestReceived(const USBGenericRequest *request)
{
    HIDDTransferDriver_RequestHandler(request);
}

#endif

//------------------------------------------------------------------------------
//         ConfigurationChanged() callback re-implementation
//------------------------------------------------------------------------------