627 lines
18 KiB
C
627 lines
18 KiB
C
/**************************************************************************/
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/*!
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@file msc_uf2.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) 2018, Adafruit Industries (adafruit.com)
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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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*/
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/**************************************************************************/
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#include "msc_uf2.h"
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#if CFG_TUD_MSC
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#include "pstorage.h"
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// for formatting fatfs when Softdevice is not enabled
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#include "nrf_nvmc.h"
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#include "uf2/uf2.h"
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#define SECTORS_PER_FAT 7
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#define ROOT_DIR_SECTOR 8
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#define SECTOR_DATA (1+SECTORS_PER_FAT+ROOT_DIR_SECTOR)
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/*------------------------------------------------------------------*/
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/* MACRO TYPEDEF CONSTANT ENUM
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*------------------------------------------------------------------*/
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enum
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{
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WRITE10_IDLE,
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WRITE10_ERASING,
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WRITE10_ERASED,
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WRITE10_WRITING,
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WRITE10_WRITTEN,
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WRITE10_FAILED
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};
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enum { FL_PAGE_SIZE = 4096 };
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/*------------------------------------------------------------------*/
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/* FAT12
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*------------------------------------------------------------------*/
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typedef struct ATTR_PACKED {
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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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// Bios Parameter Block
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uint16_t sector_sz ; ///< 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_copies ; ///< 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 root_entry_count ; ///< 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 sector_count ; ///< 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 not_used1 ; ///< Number of sectors before the start of partition.
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uint32_t not_used2 ; ///< 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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// Extended BPB
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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 not_used3 ; ///< Some OS uses this as drive letter (e.g 0 = C:, 1 = D: etc ...), should be 0 when formatted
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uint8_t ext_boot_signature ; ///< should be 0x29
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uint32_t volume_id ; ///< 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 fs_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 not_used4[448] ;
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// uint16_t signature ; ///< Signature value (0xAA55).
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}fat12_boot_sector_t;
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VERIFY_STATIC(sizeof(fat12_boot_sector_t) == 62, "size is not correct");
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typedef struct ATTR_PACKED {
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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_dirent_t;
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VERIFY_STATIC(sizeof(fat_dirent_t) == 32, "size is not correct");
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typedef struct ATTR_PACKED {
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uint16_t dir0 : 12;
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uint16_t dir1 : 12;
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}fat12_dirpair_t;
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VERIFY_STATIC(sizeof(fat12_dirpair_t) == 3, "size is not correct");
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/*------------------------------------------------------------------*/
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/* UF2
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*------------------------------------------------------------------*/
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const char infoUf2File[] = //
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"UF2 Bootloader " UF2_VERSION "\r\n"
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"Model: " PRODUCT_NAME "\r\n"
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"Board-ID: " BOARD_ID "\r\n";
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const char indexFile[] = //
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"<!doctype html>\n"
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"<html>"
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"<body>"
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"<script>\n"
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"location.replace(\"" INDEX_URL "\");\n"
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"</script>"
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"</body>"
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"</html>\n";
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const char readme_contents[] = "Adafruit Feather nRF52840";
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struct TextFile {
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const char name[11];
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const char *content;
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};
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static const struct TextFile info[] = {
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{.name = "INFO_UF2TXT", .content = infoUf2File},
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{.name = "INDEX HTM", .content = indexFile},
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{.name = "CURRENT UF2", .content = readme_contents},
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};
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/*------------------------------------------------------------------*/
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/* VARIABLES
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*------------------------------------------------------------------*/
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struct
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{
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// Boot sector
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fat12_boot_sector_t boot;
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uint8_t not_used4[448] ;
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uint16_t signature ; ///< Signature value (0xAA55).
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// Fat
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uint8_t fat[SECTORS_PER_FAT*MSC_FLASH_BLOCK_SIZE];
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// Root Dir
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struct {
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fat_dirent_t dirent[(ROOT_DIR_SECTOR*MSC_FLASH_BLOCK_SIZE)/32];
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}root;
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} _disk_ram ATTR_ALIGNED(4);
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VERIFY_STATIC(sizeof(_disk_ram) == 16*MSC_FLASH_BLOCK_SIZE, "size is not correct");
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static uint8_t _page_cached[FL_PAGE_SIZE] ATTR_ALIGNED(4);
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volatile static uint8_t _wr10_state;
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static pstorage_handle_t _fat_psh = { .module_id = 0, .block_id = MSC_FLASH_ADDR_START } ;
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static scsi_inquiry_data_t const mscd_inquiry_data =
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{
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.is_removable = 1,
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.version = 2,
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.response_data_format = 2,
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.vendor_id = "Adafruit",
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.product_id = "Feather52840",
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.product_revision = "1.0"
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};
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static scsi_read_capacity10_data_t const mscd_read_capacity10_data =
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{
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.last_lba = ENDIAN_BE(MSC_FLASH_BLOCK_NUM-1), // read capacity
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.block_size = ENDIAN_BE(MSC_FLASH_BLOCK_SIZE)
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};
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static scsi_sense_fixed_data_t mscd_sense_data =
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{
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.response_code = 0x70,
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.sense_key = 0, // no errors
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.additional_sense_len = sizeof(scsi_sense_fixed_data_t) - 8
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};
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static scsi_read_format_capacity_data_t const mscd_format_capacity_data =
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{
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.list_length = 8,
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.block_num = ENDIAN_BE(MSC_FLASH_BLOCK_NUM), // write capacity
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.descriptor_type = 2, // TODO formatted media, refractor to const
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.block_size_u16 = ENDIAN_BE16(MSC_FLASH_BLOCK_SIZE)
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};
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static scsi_mode_parameters_t const msc_dev_mode_para =
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{
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.mode_data_length = 3,
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.medium_type = 0,
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.device_specific_para = 0,
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.block_descriptor_length = 0
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};
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/*------------------------------------------------------------------*/
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/*
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*------------------------------------------------------------------*/
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static inline uint32_t lba2addr(uint32_t lba)
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{
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return MSC_FLASH_ADDR_START + lba*MSC_FLASH_BLOCK_SIZE;
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}
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static void fat12_mkfs(void);
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/*------------------------------------------------------------------*/
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/*
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*------------------------------------------------------------------*/
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static void fat_pstorage_cb(pstorage_handle_t * p_handle, uint8_t op_code, uint32_t result, uint8_t * p_data, uint32_t data_len)
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{
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if ( result != NRF_SUCCESS )
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{
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_wr10_state = WRITE10_FAILED;
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TU_ASSERT(false, );
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}
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if ( PSTORAGE_CLEAR_OP_CODE == op_code)
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{
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if ( WRITE10_ERASING == _wr10_state) _wr10_state = WRITE10_ERASED;
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}
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else if ( PSTORAGE_STORE_OP_CODE == op_code)
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{
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if ( WRITE10_WRITING == _wr10_state) _wr10_state = WRITE10_WRITTEN;
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}
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}
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/*------------------------------------------------------------------*/
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/* API
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*------------------------------------------------------------------*/
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void msc_uf2_init(void)
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{
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pstorage_module_param_t fat_psp = { .cb = fat_pstorage_cb};
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pstorage_register(&fat_psp, &_fat_psh);
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}
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void msc_uf2_mount(void)
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{
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_wr10_state = WRITE10_IDLE;
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// reset every time it is plugged
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fat12_mkfs();
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}
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void msc_uf2_umount(void)
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{
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}
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//--------------------------------------------------------------------+
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// tinyusb callbacks
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//--------------------------------------------------------------------+
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int32_t tud_msc_scsi_cb (uint8_t rhport, 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* ptr = NULL;
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uint16_t len = 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_INQUIRY:
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ptr = &mscd_inquiry_data;
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len = sizeof(scsi_inquiry_data_t);
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break;
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case SCSI_CMD_READ_CAPACITY_10:
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ptr = &mscd_read_capacity10_data;
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len = sizeof(scsi_read_capacity10_data_t);
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break;
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case SCSI_CMD_REQUEST_SENSE:
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ptr = &mscd_sense_data;
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len = sizeof(scsi_sense_fixed_data_t);
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break;
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case SCSI_CMD_READ_FORMAT_CAPACITY:
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ptr = &mscd_format_capacity_data;
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len = sizeof(scsi_read_format_capacity_data_t);
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break;
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case SCSI_CMD_MODE_SENSE_6:
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ptr = &msc_dev_mode_para;
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len = sizeof(msc_dev_mode_para);
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break;
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case SCSI_CMD_TEST_UNIT_READY:
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ptr = NULL;
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len = 0;
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break;
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case SCSI_CMD_PREVENT_ALLOW_MEDIUM_REMOVAL:
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ptr = NULL;
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len = 0;
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break;
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default:
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// negative is error -> Data stage is STALL, status = failed
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return -1;
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}
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// return len must not larger than bufsize
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TU_ASSERT( bufsize >= len );
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if ( ptr && len )
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{
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if(in_xfer)
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{
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memcpy(buffer, ptr, len);
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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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//------------- clear sense data if it is not request sense command -------------//
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if ( SCSI_CMD_REQUEST_SENSE != scsi_cmd[0] )
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{
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mscd_sense_data.sense_key = SCSI_SENSEKEY_NONE;
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mscd_sense_data.additional_sense_code = 0;
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mscd_sense_data.additional_sense_qualifier = 0;
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}
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return len;
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}
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/*------------------------------------------------------------------*/
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/* Tinyusb Flash READ10 & WRITE10
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*------------------------------------------------------------------*/
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static bool fl_page_erase(uint32_t addr)
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{
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_fat_psh.block_id = addr;
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return NRF_SUCCESS == pstorage_clear(&_fat_psh, FL_PAGE_SIZE);
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}
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static bool fl_page_write(uint32_t addr, uint8_t* buf, uint16_t bufsize)
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{
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_fat_psh.block_id = addr;
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return NRF_SUCCESS == pstorage_store(&_fat_psh, buf, bufsize, 0);
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}
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int32_t tud_msc_read10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize)
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{
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(void) rhport; (void) lun;
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if ( lba < SECTOR_DATA )
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{
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memcpy(buffer, ((uint8_t*) &_disk_ram) + lba*MSC_FLASH_BLOCK_SIZE, bufsize);
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}
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else
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{
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lba -= SECTOR_DATA;
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if ( lba < arrcount_(info) - 1 )
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{
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strcpy(buffer, info[lba].content); // INFO_UF2.TXT & INDEX.HTM contents
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}
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else
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{
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lba -= (arrcount_(info) - 1);
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}
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}
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return bufsize;
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}
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int32_t tud_msc_write10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize)
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{
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(void) rhport; (void) lun;
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uint32_t addr = lba2addr(lba) + offset;
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if ( lba < SECTOR_DATA )
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{
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memcpy(((uint8_t*) &_disk_ram) + lba*MSC_FLASH_BLOCK_SIZE, buffer, bufsize);
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}
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/* 0. Check if flash is the same as data -> skip if matches
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* 1. queue flash erase pstorage_clear(), return 0 until erasing is done
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* 2. queue flash writing, return 0 until writing is complete
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* 3. return written bytes.
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*
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* Note since CFG_TUD_MSC_BUFSIZE is 4KB, bufsize is cap at 4KB
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*/
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switch(_wr10_state)
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{
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case WRITE10_IDLE:
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{
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// No need to write if flash's content matches with data
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if ( 0 == memcmp(buffer, (void*) addr, bufsize) ) return bufsize;
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uint32_t page_addr = align4k(addr);
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uint32_t off4k = offset4k(addr);
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// Cache contents from start of page to current address
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if ( off4k )
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{
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memcpy(_page_cached, (uint8_t*) page_addr, off4k);
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}
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// Copy new data
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memcpy(_page_cached+off4k, buffer, bufsize);
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// Cache contents after data to end of page
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if ( off4k + bufsize < FL_PAGE_SIZE)
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{
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memcpy(_page_cached+off4k+bufsize, (uint8_t*) (addr+bufsize), FL_PAGE_SIZE - (off4k + bufsize ) );
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}
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// Start erasing
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TU_ASSERT( fl_page_erase(align4k(addr)), -1);
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_wr10_state = WRITE10_ERASING;
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// Tell tinyusb that we are not ready to consume its data
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// The stack will keep the data and call again
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return 0;
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}
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break;
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case WRITE10_ERASING:
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// still erasing, nothing else to do
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return 0;
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break;
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case WRITE10_ERASED:
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// Start writing
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TU_ASSERT( fl_page_write(align4k(addr), _page_cached, FL_PAGE_SIZE), -1);
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_wr10_state = WRITE10_WRITING;
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return 0;
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break;
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case WRITE10_WRITING:
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return 0;
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break;
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case WRITE10_WRITTEN:
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_wr10_state = WRITE10_IDLE; // back to idle
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// positive return means we complete the operation, tinyusb can receiving next write10
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return bufsize;
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break;
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case WRITE10_FAILED:
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_wr10_state = WRITE10_IDLE;
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return -1;
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break;
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default: return -1; break;
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}
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}
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//--------------------------------------------------------------------+
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// FAT12
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//--------------------------------------------------------------------+
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/* 0 ______________
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* | Boot Sector | Fat copies = 1, Fat size = 7
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* |_____________| Root Dir = 16*8 (4KB), sector per cluster = 1
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* 1 | FAT0 |
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* . | |
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* . | ( 7x512 ) |
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* 7 |_____________|
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* 8 | Root Dir |
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* . | |
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* . | ( 8x512 ) |
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* 15|_____________|
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* 16| |
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* . | |
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* . | |
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* . | Data |
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* . | Area |
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* . | |
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* . | |
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* |_____________|
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*/
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fat12_boot_sector_t const _boot_sect =
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{
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.jump_code = { 0xEB, 0xFE, 0x90 },
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.oem_name = "MSDOS5.0",
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.sector_sz = MSC_FLASH_BLOCK_SIZE,
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.sector_per_cluster = 1,
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.reserved_sectors = 1,
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.fat_copies = 1,
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.root_entry_count = (ROOT_DIR_SECTOR*MSC_FLASH_BLOCK_SIZE)/32,
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.sector_count = MSC_FLASH_BLOCK_NUM,
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.media_type = 0xf8, // fixed disk
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.sector_per_fat = SECTORS_PER_FAT,
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.sector_per_track = 1,
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.head_num = 1,
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.not_used1 = 0,
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.not_used2 = 0,
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.drive_number = 0,
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.not_used3 = 0,
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.ext_boot_signature = 0x29,
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.volume_id = 0x00420042, // change later to typically date + time
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.volume_label = MSC_FLASH_VOL_LABEL,
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.fs_type = "FAT12 "
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};
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static void fat12_mkfs(void)
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{
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varclr_(&_disk_ram);
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/*------------- Sector 0: Boot Sector -------------*/
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_disk_ram.boot = _boot_sect;
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_disk_ram.signature = 0xAA55;
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//------------- Sector 1: FAT12 Table -------------//
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// Dir entry 0 & 1 are always FF8 and FF8
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fat12_dirpair_t* dirpair;
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dirpair = (fat12_dirpair_t*) _disk_ram.fat;
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dirpair->dir0 = dirpair->dir1 = 0xFF8;
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// Dir entry 2 & 3 are FFF (end) of info and index since their size are less than 512
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dirpair = (fat12_dirpair_t*) (_disk_ram.fat+3);
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dirpair->dir0 = dirpair->dir1 = 0xFFF;
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// Dir entry chain for uf2 file
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dirpair = (fat12_dirpair_t*) (_disk_ram.fat+6);
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dirpair->dir0 = 0xFFF;
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dirpair->dir1 = 0x000;
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//------------- Root Directory -------------//
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// first entry is volume label
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_disk_ram.root.dirent[0] = (fat_dirent_t)
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{
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.name = MSC_FLASH_VOL_LABEL,
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.attr.volume_label = 1,
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};
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uint16_t data_cluster = 2; // logical data cluster always start from 2
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for(int i=0; i<arrcount_(info); i++)
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{
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fat_dirent_t* p_dir = _disk_ram.root.dirent+1+i;
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(*p_dir) = (fat_dirent_t)
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{
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.name = { 0 },
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.attr = { 0 },
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.reserved = 0,
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.created_time_tenths_of_seconds = 0,
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.created_time = 0x6D52,
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.created_date = 0x4365,
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.accessed_date = 0x4365,
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.cluster_high = 0,
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.written_time = 0x6D52,
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.written_date = 0x4365,
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.cluster_low = data_cluster,
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.file_size = strlen(info[i].content)
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};
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memcpy(p_dir->name, info[i].name, 11);
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data_cluster++;
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}
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//------------- Data Contents -------------//
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// memclr_(_page_cached, sizeof(_page_cached));
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//
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// for(int i=0; i<arrcount_(info); i++)
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// {
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// memcpy(_page_cached + i*512, info[i].content, strlen(info[i].content));
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// }
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//
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// // Erase and Write data cluster.
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// fat12_write_sector(16, _page_cached, FL_PAGE_SIZE);
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}
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#endif
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