usbd_core_msc.c

00001 /**
00002  * @file    usbd_core_msc.c
00003  * @brief   Mass Storage Class driver
00004  *
00005  * DAPLink Interface Firmware
00006  * Copyright (c) 2009-2016, ARM Limited, All Rights Reserved
00007  * SPDX-License-Identifier: Apache-2.0
00008  *
00009  * Licensed under the Apache License, Version 2.0 (the "License"); you may
00010  * not use this file except in compliance with the License.
00011  * You may obtain a copy of the License at
00012  *
00013  * http://www.apache.org/licenses/LICENSE-2.0
00014  *
00015  * Unless required by applicable law or agreed to in writing, software
00016  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
00017  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00018  * See the License for the specific language governing permissions and
00019  * limitations under the License.
00020  */
00021 
00022 #include <string.h>
00023 
00024 #include "rl_usb.h"
00025 #include "usb_for_lib.h"
00026 
00027 
00028 /*
00029  *  Clear Feature USB Device Request - MSC specific handling
00030  *    Parameters:      EPNum: Endpoint number
00031  *    Return Value:    None
00032  */
00033 
00034 __weak void USBD_ReqClrFeature_MSC(U32 EPNum)
00035 {
00036     USBD_MSC_ClrStallEP(EPNum);
00037 }
00038 
00039 
00040 /*
00041  *  USB Device Endpoint 0 Event Callback - MSC specific handling (Setup Request To Interface)
00042  *    Parameters:      none
00043  *    Return Value:    TRUE - Setup class request ok, FALSE - Setup class request not supported
00044  */
00045 
00046 __weak BOOL USBD_EndPoint0_Setup_MSC_ReqToIF(void)
00047 {
00048     if (USBD_SetupPacket.wIndexL == usbd_msc_if_num) {         /* IF number correct? */
00049         switch (USBD_SetupPacket.bRequest) {
00050             case MSC_REQUEST_RESET:
00051                 if ((USBD_SetupPacket.wValue   == 0) &&              /* RESET with invalid parameters -> STALL */
00052                         (USBD_SetupPacket.wLength  == 0)) {
00053                     if (USBD_MSC_Reset()) {
00054                         USBD_StatusInStage();
00055                         return (__TRUE);
00056                     }
00057                 }
00058 
00059                 break;
00060 
00061             case MSC_REQUEST_GET_MAX_LUN:
00062                 if ((USBD_SetupPacket.wValue   == 0) &&              /* GET_MAX_LUN with invalid parameters -> STALL */
00063                         (USBD_SetupPacket.wLength  == 1)) {
00064                     if (USBD_MSC_GetMaxLUN()) {
00065                         USBD_EP0Data.pData = USBD_EP0Buf;
00066                         USBD_DataInStage();
00067                         return (__TRUE);
00068                     }
00069                 }
00070 
00071                 break;
00072         }
00073     }
00074 
00075     return (__FALSE);
00076 }