USBHostMSD.h

00001 /* mbed USBHost Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #ifndef USBHOSTMSD_H
00018 #define USBHOSTMSD_H
00019 
00020 #if _USB_DBG
00021 #define USB_DBG(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\r\n");} while(0);
00022 #else
00023 #define USB_DBG(...)  while(0);
00024 #endif
00025 
00026 #if 0
00027 #define USB_DBG2(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\r\n");} while(0);
00028 #else
00029 #define USB_DBG2(...)  while(0);
00030 #endif
00031 
00032 #if 1
00033 #define USB_INFO(...) do{fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\r\n");}while(0);
00034 #else
00035 #define USB_INFO(...)  while(0);
00036 #endif
00037 
00038 #include "USBHostConf.h"
00039 #include "USBHost.h"
00040 #include "FATFileSystem.h"
00041 
00042 /** 
00043  * A class to communicate a USB flash disk
00044  */
00045 class USBHostMSD : public IUSBEnumerator, public FATFileSystem {
00046 public:
00047     /**
00048     * Constructor
00049     *
00050     * @param rootdir mount name
00051     */
00052     USBHostMSD(const char * rootdir);
00053 
00054     /**
00055     * Check if a MSD device is connected
00056     *
00057     * @return true if a MSD device is connected
00058     */
00059     bool connected();
00060 
00061     /**
00062      * Try to connect to a MSD device
00063      *
00064      * @return true if connection was successful
00065      */
00066     bool connect();
00067 
00068 protected:
00069     //From IUSBEnumerator
00070     virtual void setVidPid(uint16_t vid, uint16_t pid);
00071     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
00072     virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
00073 
00074     // From FATFileSystem
00075     virtual int disk_initialize();
00076     virtual int disk_status() {return 0;};
00077     virtual int disk_read(uint8_t * buffer, uint64_t sector);
00078     virtual int disk_write(const uint8_t * buffer, uint64_t sector);
00079     virtual int disk_sync() {return 0;};
00080     virtual uint64_t disk_sectors();
00081 
00082 private:
00083     USBHost * host;
00084     USBDeviceConnected * dev;
00085     bool dev_connected;
00086     USBEndpoint * bulk_in;
00087     USBEndpoint * bulk_out;
00088     uint8_t nb_ep;
00089 
00090     // Bulk-only CBW
00091     typedef __packed struct {
00092         uint32_t Signature;
00093         uint32_t Tag;
00094         uint32_t DataLength;
00095         uint8_t  Flags;
00096         uint8_t  LUN;
00097         uint8_t  CBLength;
00098         uint8_t  CB[16];
00099     } CBW;
00100 
00101     // Bulk-only CSW
00102     typedef __packed struct {
00103         uint32_t Signature;
00104         uint32_t Tag;
00105         uint32_t DataResidue;
00106         uint8_t  Status;
00107     } CSW;
00108 
00109     CBW cbw;
00110     CSW csw;
00111 
00112     int SCSITransfer(uint8_t * cmd, uint8_t cmd_len, int flags, uint8_t * data, uint32_t transfer_len);
00113     int testUnitReady();
00114     int readCapacity();
00115     int inquiry(uint8_t lun, uint8_t page_code);
00116     int SCSIRequestSense();
00117     int dataTransfer(uint8_t * buf, uint32_t block, uint8_t nbBlock, int direction);
00118     int checkResult(uint8_t res, USBEndpoint * ep);
00119     int getMaxLun();
00120 
00121     int blockSize;
00122     uint64_t blockCount;
00123 
00124     int msd_intf;
00125     bool msd_device_found;
00126     bool disk_init;
00127     
00128     void init();
00129 };
00130 
00131 #endif