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239 lines
10 KiB
C
239 lines
10 KiB
C
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/**************************************************************************/
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/*!
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@file mscd_app_ramdisk.c
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@author hathach (tinyusb.org)
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2013, hathach (tinyusb.org)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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This file is part of the tinyusb stack.
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*/
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/**************************************************************************/
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#include "mscd_app.h"
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#if TUSB_CFG_DEVICE_MSC && defined (MSCD_APP_RAMDISK)
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//--------------------------------------------------------------------+
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// MACRO CONSTANT TYPEDEF
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//--------------------------------------------------------------------+
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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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//--------------------------------------------------------------------+
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// INTERNAL OBJECT & FUNCTION DECLARATION
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//--------------------------------------------------------------------+
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ATTR_USB_MIN_ALIGNMENT
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uint8_t mscd_app_ramdisk[DISK_BLOCK_NUM][DISK_BLOCK_SIZE] TUSB_CFG_ATTR_USBRAM =
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{
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//------------- Boot Sector -------------//
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[0] =
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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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[510] = 0x55, [511] = 0xAA // FAT magic code
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},
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//------------- FAT12 Table (first 2 entries are F8FF, third entry is cluster end of readme file-------------//
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[1] =
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{
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0xF8, 0xFF, 0xFF, 0xFF, 0x0F
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},
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//------------- Root Directory -------------//
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[2] =
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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 filesize (4 Bytes)
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},
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//------------- Readme Content -------------//
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[3] = README_CONTENTS
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};
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//--------------------------------------------------------------------+
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// IMPLEMENTATION
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//--------------------------------------------------------------------+
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uint16_t read10(uint8_t coreid, uint8_t lun, scsi_read10_t* p_read10, void** pp_buffer)
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{
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uint8_t block_count = __be2h_16(p_read10->block_count);
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(*pp_buffer) = mscd_app_ramdisk[ __be2le(p_read10->lba)];
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return block_count*DISK_BLOCK_SIZE;
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}
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uint16_t write10(uint8_t coreid, uint8_t lun, scsi_read10_t* p_read10, void** pp_buffer)
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{
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uint8_t block_count = __be2h_16(p_read10->block_count);
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(*pp_buffer) = mscd_app_ramdisk[ __be2le(p_read10->lba)];
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return block_count*DISK_BLOCK_SIZE;
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}
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//--------------------------------------------------------------------+
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// HELPER
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//--------------------------------------------------------------------+
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#if 0 // no need to use fat12 helper
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typedef ATTR_PACKED_STRUCT(struct) {
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//------------- common -------------//
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uint8_t jump_code[3] ; ///< Assembly instruction to jump to boot code.
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uint8_t oem_name[8] ; ///< OEM Name in ASCII.
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uint16_t byte_per_sector ; ///< Bytes per sector. Allowed values include 512, 1024, 2048, and 4096.
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uint8_t sector_per_cluster ; ///< Sectors per cluster (data unit). Allowed values are powers of 2, but the cluster size must be 32KB or smaller.
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uint16_t reserved_sectors ; ///< Size in sectors of the reserved area.
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uint8_t fat_num ; ///< Number of FATs. Typically two for redundancy, but according to Microsoft it can be one for some small storage devices.
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uint16_t fat12_root_entry_num ; ///< Maximum number of files in the root directory for FAT12 and FAT16. This is 0 for FAT32 and typically 512 for FAT16.
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uint16_t fat12_sector_num_16 ; ///< 16-bit number of sectors in file system. If the number of sectors is larger than can be represented in this 2-byte value, a 4-byte value exists later in the data structure and this should be 0.
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uint8_t media_type ; ///< 0xf8 should be used for fixed disks and 0xf0 for removable.
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uint16_t sector_per_fat ; ///< 16-bit size in sectors of each FAT for FAT12 and FAT16. For FAT32, this field is 0.
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uint16_t sector_per_track ; ///< Sectors per track of storage device.
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uint16_t head_num ; ///< Number of heads in storage device.
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uint32_t hidden_sectors ; ///< Number of sectors before the start of partition.
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uint32_t sector_num_32 ; ///< 32-bit value of number of sectors in file system. Either this value or the 16-bit value above must be 0.
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//------------- FAT32 -------------//
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uint8_t drive_number ; ///< Physical drive number (0x00 for (first) removable media, 0x80 for (first) fixed disk
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uint8_t reserved ;
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uint8_t extended_boot_signature ; ///< should be 0x29
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uint32_t volume_serial_number ; ///< Volume serial number, which some versions of Windows will calculate based on the creation date and time.
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uint8_t volume_label[11] ;
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uint8_t filesystem_type[8] ; ///< File system type label in ASCII, padded with blank (0x20). Standard values include "FAT," "FAT12," and "FAT16," but nothing is required.
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uint8_t reserved2[448] ;
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uint16_t fat_signature ; ///< Signature value (0xAA55).
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}fat12_boot_sector_t;
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STATIC_ASSERT(sizeof(fat12_boot_sector_t) == 512, "size is not correct");
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typedef ATTR_PACKED_STRUCT(struct) {
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uint8_t name[11];
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ATTR_PACKED_STRUCT(struct){
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uint8_t readonly : 1;
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uint8_t hidden : 1;
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uint8_t system : 1;
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uint8_t volume_label : 1;
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uint8_t directory : 1;
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uint8_t archive : 1;
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} attr; // Long File Name = 0x0f
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uint8_t reserved;
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uint8_t created_time_tenths_of_seconds;
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uint16_t created_time;
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uint16_t created_date;
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uint16_t accessed_date;
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uint16_t cluster_high;
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uint16_t written_time;
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uint16_t written_date;
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uint16_t cluster_low;
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uint32_t file_size;
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}fat_directory_t;
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STATIC_ASSERT(sizeof(fat_directory_t) == 32, "size is not correct");
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void fat12_fs_init(uint8_t mscd_app_ramdisk[DISK_BLOCK_NUM][DISK_BLOCK_SIZE])
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{
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uint8_t const 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 https://github.com/hathach/tinyusb";
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//------------- Boot Sector -------------//
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fat12_boot_sector_t* p_boot_fat = (fat12_boot_sector_t* ) mscd_app_ramdisk[0];
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memclr_(p_boot_fat, sizeof(fat12_boot_sector_t));
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memcpy(p_boot_fat->jump_code, "\xEB\x3C\x90", 3);
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memcpy(p_boot_fat->oem_name, "MSDOS5.0", 8);
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p_boot_fat->byte_per_sector = DISK_BLOCK_SIZE;
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p_boot_fat->sector_per_cluster = 1;
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p_boot_fat->reserved_sectors = 1;
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p_boot_fat->fat_num = 1;
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p_boot_fat->fat12_root_entry_num = 16;
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p_boot_fat->fat12_sector_num_16 = DISK_BLOCK_NUM;
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p_boot_fat->media_type = 0xf8; // fixed disk
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p_boot_fat->sector_per_fat = 1;
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p_boot_fat->sector_per_track = 1;
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p_boot_fat->head_num = 1;
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p_boot_fat->hidden_sectors = 0;
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p_boot_fat->drive_number = 0x80;
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p_boot_fat->extended_boot_signature = 0x29;
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p_boot_fat->volume_serial_number = 0x1234;
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memcpy(p_boot_fat->volume_label , "tinyusb msc", 11);
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memcpy(p_boot_fat->filesystem_type, "FAT12 ", 8);
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p_boot_fat->fat_signature = 0xAA55;
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//------------- FAT12 Table (first 2 entries are F8FF, third entry is cluster end of readme file-------------//
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memcpy(mscd_app_ramdisk[1], "\xF8\xFF\xFF\xFF\x0F", 5);
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//------------- Root Directory -------------//
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fat_directory_t* p_entry = (fat_directory_t*) mscd_app_ramdisk[2];
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// first entry is volume label
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(*p_entry) = (fat_directory_t)
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{
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.name = "TINYUSB MSC",
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.attr.volume_label = 1,
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};
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p_entry += 1; // advance to second entry, second entry is readme file
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(*p_entry) = (fat_directory_t)
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{
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.name = "README TXT",
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.created_time = 0x6D52,
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.written_time = 0x6D52,
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.created_date = 0x4365,
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.accessed_date = 0x4365,
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.written_date = 0x4365,
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.cluster_high = 0,
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.cluster_low = 2,
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.file_size = sizeof(readme_contents)-1 // exculde NULL
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}; // first entry is volume label
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//------------- Readme Content -------------//
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memcpy(mscd_app_ramdisk[3], readme_contents, sizeof(readme_contents)-1);
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}
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#endif
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#endif
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