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/* mbed USBHost Library
* Copyright (c) 2006-2013 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef USBHOSTMSD_H
#define USBHOSTMSD_H
#include "USBHostConf.h"
#if USBHOST_MSD
#include "USBHost.h"
#include "FATFileSystem.h"
/**
* A class to communicate a USB flash disk
*/
class USBHostMSD : public IUSBEnumerator, public FATFileSystem {
public:
/**
* Constructor
*
* @param rootdir mount name
*/
USBHostMSD(const char * rootdir);
/**
* Check if a MSD device is connected
*
* @return true if a MSD device is connected
*/
bool connected();
/**
* Try to connect to a MSD device
*
* @return true if connection was successful
*/
bool connect();
protected:
//From IUSBEnumerator
virtual void setVidPid(uint16_t vid, uint16_t pid);
virtual bool parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol); //Must return true if the interface should be parsed
virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
// From FATFileSystem
virtual int disk_initialize();
virtual int disk_status() {return 0;};
virtual int disk_read(uint8_t* buffer, uint64_t sector, uint8_t count);
virtual int disk_write(const uint8_t* buffer, uint64_t sector, uint8_t count);
virtual int disk_sync() {return 0;};
virtual uint64_t disk_sectors();
private:
USBHost * host;
USBDeviceConnected * dev;
bool dev_connected;
USBEndpoint * bulk_in;
USBEndpoint * bulk_out;
uint8_t nb_ep;
// Bulk-only CBW
typedef struct {
uint32_t Signature;
uint32_t Tag;
uint32_t DataLength;
uint8_t Flags;
uint8_t LUN;
uint8_t CBLength;
uint8_t CB[16];
} PACKED CBW;
// Bulk-only CSW
typedef struct {
uint32_t Signature;
uint32_t Tag;
uint32_t DataResidue;
uint8_t Status;
} PACKED CSW;
CBW cbw;
CSW csw;
int SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len);
int testUnitReady();
int readCapacity();
int inquiry(uint8_t lun, uint8_t page_code);
int SCSIRequestSense();
int dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction);
int checkResult(uint8_t res, USBEndpoint * ep);
int getMaxLun();
int blockSize;
uint64_t blockCount;
int msd_intf;
bool msd_device_found;
bool disk_init;
void init();
};
#endif
#endif
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