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authorJun Wako <wakojun@gmail.com>2015-04-24 16:26:14 +0900
committerJun Wako <wakojun@gmail.com>2015-04-24 16:26:14 +0900
commit1fe4406f374291ab2e86e95a97341fd9c475fcb8 (patch)
tree1be0e16b4b07b5a31ea97ec50a9eb13a288c3d27 /tool/mbed/mbed-sdk/libraries/USBDevice/USBMSD/USBMSD.h
parenta20ef7052c6e937d2f7672dd59456e55a5c08296 (diff)
Squashed 'tmk_core/' changes from 7967731..b9e0ea0
b9e0ea0 Merge commit '7fa9d8bdea3773d1195b04d98fcf27cf48ddd81d' as 'tool/mbed/mbed-sdk' 7fa9d8b Squashed 'tool/mbed/mbed-sdk/' content from commit 7c21ce5 git-subtree-dir: tmk_core git-subtree-split: b9e0ea08cb940de20b3610ecdda18e9d8cd7c552
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+/* Copyright (c) 2010-2011 mbed.org, MIT License
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+* and associated documentation files (the "Software"), to deal in the Software without
+* restriction, including without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all copies or
+* substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+
+#ifndef USBMSD_H
+#define USBMSD_H
+
+/* These headers are included for child class. */
+#include "USBEndpoints.h"
+#include "USBDescriptor.h"
+#include "USBDevice_Types.h"
+
+#include "USBDevice.h"
+
+/**
+ * USBMSD class: generic class in order to use all kinds of blocks storage chip
+ *
+ * Introduction
+ *
+ * The USBMSD implements the MSD protocol. It permits to access a memory chip (flash, sdcard,...)
+ * from a computer over USB. But this class doesn't work standalone, you need to subclass this class
+ * and define virtual functions which are called in USBMSD.
+ *
+ * How to use this class with your chip ?
+ *
+ * You have to inherit and define some pure virtual functions (mandatory step):
+ * - virtual int disk_read(char * data, int block): function to read a block
+ * - virtual int disk_write(const char * data, int block): function to write a block
+ * - virtual int disk_initialize(): function to initialize the memory
+ * - virtual int disk_sectors(): return the number of blocks
+ * - virtual int disk_size(): return the memory size
+ * - virtual int disk_status(): return the status of the storage chip (0: OK, 1: not initialized, 2: no medium in the drive, 4: write protection)
+ *
+ * All functions names are compatible with the fat filesystem library. So you can imagine using your own class with
+ * USBMSD and the fat filesystem library in the same program. Just be careful because there are two different parts which
+ * will access the sd card. You can do a master/slave system using the disk_status method.
+ *
+ * Once these functions defined, you can call connect() (at the end of the constructor of your class for instance)
+ * of USBMSD to connect your mass storage device. connect() will first call disk_status() to test the status of the disk.
+ * If disk_status() returns 1 (disk not initialized), then disk_initialize() is called. After this step, connect() will collect information
+ * such as the number of blocks and the memory size.
+ */
+class USBMSD: public USBDevice {
+public:
+
+ /**
+ * Constructor
+ *
+ * @param vendor_id Your vendor_id
+ * @param product_id Your product_id
+ * @param product_release Your preoduct_release
+ */
+ USBMSD(uint16_t vendor_id = 0x0703, uint16_t product_id = 0x0104, uint16_t product_release = 0x0001);
+
+ /**
+ * Connect the USB MSD device. Establish disk initialization before really connect the device.
+ *
+ * @param blocking if not configured
+ * @returns true if successful
+ */
+ bool connect(bool blocking = true);
+
+ /**
+ * Disconnect the USB MSD device.
+ */
+ void disconnect();
+
+ /**
+ * Destructor
+ */
+ ~USBMSD();
+
+protected:
+
+ /*
+ * read one or more blocks on a storage chip
+ *
+ * @param data pointer where will be stored read data
+ * @param block starting block number
+ * @param count number of blocks to read
+ * @returns 0 if successful
+ */
+ virtual int disk_read(uint8_t* data, uint64_t block, uint8_t count) = 0;
+
+ /*
+ * write one or more blocks on a storage chip
+ *
+ * @param data data to write
+ * @param block starting block number
+ * @param count number of blocks to write
+ * @returns 0 if successful
+ */
+ virtual int disk_write(const uint8_t* data, uint64_t block, uint8_t count) = 0;
+
+ /*
+ * Disk initilization
+ */
+ virtual int disk_initialize() = 0;
+
+ /*
+ * Return the number of blocks
+ *
+ * @returns number of blocks
+ */
+ virtual uint64_t disk_sectors() = 0;
+
+ /*
+ * Return memory size
+ *
+ * @returns memory size
+ */
+ virtual uint64_t disk_size() = 0;
+
+
+ /*
+ * To check the status of the storage chip
+ *
+ * @returns status: 0: OK, 1: disk not initialized, 2: no medium in the drive, 4: write protected
+ */
+ virtual int disk_status() = 0;
+
+ /*
+ * Get string product descriptor
+ *
+ * @returns pointer to the string product descriptor
+ */
+ virtual uint8_t * stringIproductDesc();
+
+ /*
+ * Get string interface descriptor
+ *
+ * @returns pointer to the string interface descriptor
+ */
+ virtual uint8_t * stringIinterfaceDesc();
+
+ /*
+ * Get configuration descriptor
+ *
+ * @returns pointer to the configuration descriptor
+ */
+ virtual uint8_t * configurationDesc();
+
+ /*
+ * Callback called when a packet is received
+ */
+ virtual bool EPBULK_OUT_callback();
+
+ /*
+ * Callback called when a packet has been sent
+ */
+ virtual bool EPBULK_IN_callback();
+
+ /*
+ * Set configuration of device. Add endpoints
+ */
+ virtual bool USBCallback_setConfiguration(uint8_t configuration);
+
+ /*
+ * Callback called to process class specific requests
+ */
+ virtual bool USBCallback_request();
+
+
+private:
+
+ // MSC Bulk-only Stage
+ enum Stage {
+ READ_CBW, // wait a CBW
+ ERROR, // error
+ PROCESS_CBW, // process a CBW request
+ SEND_CSW, // send a CSW
+ WAIT_CSW, // wait that a CSW has been effectively sent
+ };
+
+ // 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;
+
+ //state of the bulk-only state machine
+ Stage stage;
+
+ // current CBW
+ CBW cbw;
+
+ // CSW which will be sent
+ CSW csw;
+
+ // addr where will be read or written data
+ uint32_t addr;
+
+ // length of a reading or writing
+ uint32_t length;
+
+ // memory OK (after a memoryVerify)
+ bool memOK;
+
+ // cache in RAM before writing in memory. Useful also to read a block.
+ uint8_t * page;
+
+ int BlockSize;
+ uint64_t MemorySize;
+ uint64_t BlockCount;
+
+ void CBWDecode(uint8_t * buf, uint16_t size);
+ void sendCSW (void);
+ bool inquiryRequest (void);
+ bool write (uint8_t * buf, uint16_t size);
+ bool readFormatCapacity();
+ bool readCapacity (void);
+ bool infoTransfer (void);
+ void memoryRead (void);
+ bool modeSense6 (void);
+ void testUnitReady (void);
+ bool requestSense (void);
+ void memoryVerify (uint8_t * buf, uint16_t size);
+ void memoryWrite (uint8_t * buf, uint16_t size);
+ void reset();
+ void fail();
+};
+
+#endif