222 lines
9.2 KiB
C
222 lines
9.2 KiB
C
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/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018, hathach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include "bsp/board.h"
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#include "tusb.h"
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#if CFG_TUD_MSC
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// Some MCU doesn't have enough 8KB SRAM to store the whole disk
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// We will use Flash as read-only disk
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#if CFG_TUSB_MCU == OPT_MCU_LPC13XX
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#define DISK_READONLY
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#endif
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#define README_CONTENTS \
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"This is tinyusb's MassStorage Class demo.\r\n\r\n\
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If you find any bugs or get any questions, feel free to file an\r\n\
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issue at github.com/hathach/tinyusb"
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enum
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{
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DISK_BLOCK_NUM = 16, // 8KB is the smallest size that windows allow to mount
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DISK_BLOCK_SIZE = 512
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};
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#ifdef DISK_READONLY
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const
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#endif
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uint8_t msc_disk[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] =
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{
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//------------- Block0: Boot Sector -------------//
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// byte_per_sector = DISK_BLOCK_SIZE; fat12_sector_num_16 = DISK_BLOCK_NUM;
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// sector_per_cluster = 1; reserved_sectors = 1;
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// fat_num = 1; fat12_root_entry_num = 16;
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// sector_per_fat = 1; sector_per_track = 1; head_num = 1; hidden_sectors = 0;
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// drive_number = 0x80; media_type = 0xf8; extended_boot_signature = 0x29;
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// filesystem_type = "FAT12 "; volume_serial_number = 0x1234; volume_label = "tinyusb msc";
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{
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0xEB, 0x3C, 0x90, 0x4D, 0x53, 0x44, 0x4F, 0x53, 0x35, 0x2E, 0x30, 0x00, 0x02, 0x01, 0x01, 0x00,
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0x01, 0x10, 0x00, 0x10, 0x00, 0xF8, 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0x29, 0x34, 0x12, 0x00, 0x00, 0x74, 0x69, 0x6E, 0x79, 0x75,
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0x73, 0x62, 0x20, 0x6D, 0x73, 0x63, 0x46, 0x41, 0x54, 0x31, 0x32, 0x20, 0x20, 0x20, 0x00, 0x00,
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// Zero up to 2 last bytes of FAT magic code
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xAA, // FAT magic code at 510-511
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},
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//------------- Block1: FAT12 Table -------------//
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{
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0xF8, 0xFF, 0xFF, 0xFF, 0x0F // // first 2 entries must be F8FF, third entry is cluster end of readme file
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},
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//------------- Block2: Root Directory -------------//
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{
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// first entry is volume label
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0x54, 0x49, 0x4E, 0x59, 0x55, 0x53, 0x42, 0x20, 0x4D, 0x53, 0x43, 0x08, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4F, 0x6D, 0x65, 0x43, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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// second entry is readme file
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'R' , 'E' , 'A' , 'D' , 'M' , 'E' , ' ' , ' ' , 'T' , 'X' , 'T' , 0x20, 0x00, 0xC6, 0x52, 0x6D,
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0x65, 0x43, 0x65, 0x43, 0x00, 0x00, 0x88, 0x6D, 0x65, 0x43, 0x02, 0x00,
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sizeof(README_CONTENTS)-1, 0x00, 0x00, 0x00 // readme's files size (4 Bytes)
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},
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//------------- Block3: Readme Content -------------//
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README_CONTENTS
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};
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// Callback invoked when received READ10 command.
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// Copy disk's data to buffer (up to bufsize) and return number of copied bytes.
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int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize)
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{
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(void) lun;
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uint8_t const* addr = msc_disk[lba] + offset;
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memcpy(buffer, addr, bufsize);
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return bufsize;
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}
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// Callback invoked when received WRITE10 command.
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// Process data in buffer to disk's storage and return number of written bytes
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int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize)
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{
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(void) lun;
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#ifndef DISK_READONLY
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uint8_t* addr = msc_disk[lba] + offset;
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memcpy(addr, buffer, bufsize);
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#else
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(void) lba; (void) offset; (void) buffer;
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#endif
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return bufsize;
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}
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// Callback invoked to determine disk's size
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void tud_msc_capacity_cb(uint8_t lun, uint32_t* block_count, uint16_t* block_size)
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{
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(void) lun;
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*block_count = DISK_BLOCK_NUM;
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*block_size = DISK_BLOCK_SIZE;
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}
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// Callback invoked when received an SCSI command not in built-in list below
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// - READ_CAPACITY10, READ_FORMAT_CAPACITY, INQUIRY, MODE_SENSE6, REQUEST_SENSE
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// - READ10 and WRITE10 has their own callbacks
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int32_t tud_msc_scsi_cb (uint8_t lun, uint8_t const scsi_cmd[16], void* buffer, uint16_t bufsize)
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{
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// read10 & write10 has their own callback and MUST not be handled here
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void const* response = NULL;
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uint16_t resplen = 0;
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// most scsi handled is input
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bool in_xfer = true;
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switch (scsi_cmd[0])
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{
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case SCSI_CMD_TEST_UNIT_READY:
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// Command that host uses to check our readiness before sending other commands
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resplen = 0;
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break;
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case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
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// Host is about to read/write etc ... better not to disconnect disk
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resplen = 0;
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break;
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case SCSI_CMD_START_STOP_UNIT:
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// Host try to eject/safe remove/poweroff us. We could safely disconnect with disk storage, or go into lower power
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/* scsi_start_stop_unit_t const * start_stop = (scsi_start_stop_unit_t const *) scsi_cmd;
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// Start bit = 0 : low power mode, if load_eject = 1 : unmount disk storage as well
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// Start bit = 1 : Ready mode, if load_eject = 1 : mount disk storage
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start_stop->start;
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start_stop->load_eject;
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*/
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resplen = 0;
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break;
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default:
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// Set Sense = Invalid Command Operation
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tud_msc_set_sense(lun, SCSI_SENSE_ILLEGAL_REQUEST, 0x20, 0x00);
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// negative means error -> tinyusb could stall and/or response with failed status
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resplen = -1;
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break;
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}
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// return resplen must not larger than bufsize
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if ( resplen > bufsize ) resplen = bufsize;
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if ( response && (resplen > 0) )
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{
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if(in_xfer)
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{
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memcpy(buffer, response, resplen);
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}else
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{
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// SCSI output
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}
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}
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return resplen;
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}
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#endif
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