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using ram for first 16 sectors of uf2 disk

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This commit is contained in:
hathach 2018-06-20 16:18:55 +07:00
parent 5dec2e2aab
commit 84cbaf81a9
2 changed files with 134 additions and 117 deletions
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250
src/usb/msc_uf2.c
View File

@ -46,11 +46,14 @@
#include "uf2/uf2.h"
#define SECTORS_PER_FAT 7
#define ROOT_DIR_SECTOR 8
#define SECTOR_DATA (1+SECTORS_PER_FAT+ROOT_DIR_SECTOR)
/*------------------------------------------------------------------*/
/* MACRO TYPEDEF CONSTANT ENUM
*------------------------------------------------------------------*/
#define BOOTSECT_SIGNATURE 0xAA55
enum
{
WRITE10_IDLE,
@ -63,9 +66,92 @@ enum
enum { FL_PAGE_SIZE = 4096 };
typedef struct ATTR_PACKED {
uint8_t jump_code[3] ; ///< Assembly instruction to jump to boot code.
uint8_t oem_name[8] ; ///< OEM Name in ASCII.
// Bios Parameter Block
uint16_t sector_sz ; ///< Bytes per sector. Allowed values include 512, 1024, 2048, and 4096.
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.
uint16_t reserved_sectors ; ///< Size in sectors of the reserved area.
uint8_t fat_copies ; ///< Number of FATs. Typically two for redundancy, but according to Microsoft it can be one for some small storage devices.
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.
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.
uint8_t media_type ; ///< 0xf8 should be used for fixed disks and 0xf0 for removable.
uint16_t sector_per_fat ; ///< 16-bit size in sectors of each FAT for FAT12 and FAT16. For FAT32, this field is 0.
uint16_t sector_per_track ; ///< Sectors per track of storage device.
uint16_t head_num ; ///< Number of heads in storage device.
uint32_t not_used1 ; ///< Number of sectors before the start of partition.
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.
// Extended BPB
uint8_t drive_number ; ///< Physical drive number (0x00 for (first) removable media, 0x80 for (first) fixed disk
uint8_t not_used3 ; ///< Some OS uses this as drive letter (e.g 0 = C:, 1 = D: etc ...), should be 0 when formatted
uint8_t ext_boot_signature ; ///< should be 0x29
uint32_t volume_id ; ///< Volume serial number, which some versions of Windows will calculate based on the creation date and time.
uint8_t volume_label[11] ;
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.
// uint8_t not_used4[448] ;
// uint16_t signature ; ///< Signature value (0xAA55).
}fat12_boot_sector_t;
VERIFY_STATIC(sizeof(fat12_boot_sector_t) == 62, "size is not correct");
typedef struct ATTR_PACKED {
uint8_t name[11];
ATTR_PACKED_STRUCT(struct){
uint8_t readonly : 1;
uint8_t hidden : 1;
uint8_t system : 1;
uint8_t volume_label : 1;
uint8_t directory : 1;
uint8_t archive : 1;
} attr; // Long File Name = 0x0f
uint8_t reserved;
uint8_t created_time_tenths_of_seconds;
uint16_t created_time;
uint16_t created_date;
uint16_t accessed_date;
uint16_t cluster_high;
uint16_t written_time;
uint16_t written_date;
uint16_t cluster_low;
uint32_t file_size;
}fat_dirent_t;
VERIFY_STATIC(sizeof(fat_dirent_t) == 32, "size is not correct");
typedef struct ATTR_PACKED {
uint16_t dir0 : 12;
uint16_t dir1 : 12;
}fat12_dirpair_t;
VERIFY_STATIC(sizeof(fat12_dirpair_t) == 3, "size is not correct");
/*------------------------------------------------------------------*/
/* VARIABLES
*------------------------------------------------------------------*/
struct
{
// Boot sector
fat12_boot_sector_t boot;
uint8_t not_used4[448] ;
uint16_t signature ; ///< Signature value (0xAA55).
// Fat
uint8_t fat[SECTORS_PER_FAT*MSC_FLASH_BLOCK_SIZE];
// Root Dir
struct {
fat_dirent_t dirent[(ROOT_DIR_SECTOR*MSC_FLASH_BLOCK_SIZE)/32];
}root;
} _disk_ram ATTR_ALIGNED(4);
VERIFY_STATIC(sizeof(_disk_ram) == 16*MSC_FLASH_BLOCK_SIZE, "size is not correct");
static uint8_t _page_cached[FL_PAGE_SIZE] ATTR_ALIGNED(4);
volatile static uint8_t _wr10_state;
@ -118,7 +204,6 @@ static inline uint32_t lba2addr(uint32_t lba)
return MSC_FLASH_ADDR_START + lba*MSC_FLASH_BLOCK_SIZE;
}
static inline bool fat12_formatted(void);
static void fat12_mkfs(void);
@ -151,11 +236,7 @@ void msc_flash_init(void)
pstorage_module_param_t fat_psp = { .cb = fat_pstorage_cb};
pstorage_register(&fat_psp, &_fat_psh);
if ( !fat12_formatted() )
{
// SoftDevice must not be enabled yet since we will use raw flash API
fat12_mkfs();
}
fat12_mkfs();
}
void msc_flash_mount(void)
@ -267,8 +348,14 @@ int32_t tud_msc_read10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t o
{
(void) rhport; (void) lun;
uint32_t addr = lba2addr(lba) + offset;
memcpy(buffer, (uint8_t*) addr, bufsize);
if ( lba < SECTOR_DATA )
{
memcpy(buffer, ((uint8_t*) &_disk_ram) + lba*MSC_FLASH_BLOCK_SIZE, bufsize);
}else
{
// uint32_t addr = lba2addr(lba) + offset;
// memcpy(buffer, (uint8_t*) addr, bufsize);
}
return bufsize;
}
@ -279,6 +366,11 @@ int32_t tud_msc_write10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t
uint32_t addr = lba2addr(lba) + offset;
if ( lba < SECTOR_DATA )
{
memcpy(((uint8_t*) &_disk_ram) + lba*MSC_FLASH_BLOCK_SIZE, buffer, bufsize);
}
/* 0. Check if flash is the same as data -> skip if matches
* 1. queue flash erase pstorage_clear(), return 0 until erasing is done
* 2. queue flash writing, return 0 until writing is complete
@ -359,65 +451,6 @@ int32_t tud_msc_write10_cb (uint8_t rhport, uint8_t lun, uint32_t lba, uint32_t
//--------------------------------------------------------------------+
// FAT12
//--------------------------------------------------------------------+
typedef struct ATTR_PACKED {
uint8_t jump_code[3] ; ///< Assembly instruction to jump to boot code.
uint8_t oem_name[8] ; ///< OEM Name in ASCII.
// Bios Parameter Block
uint16_t sector_sz ; ///< Bytes per sector. Allowed values include 512, 1024, 2048, and 4096.
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.
uint16_t reserved_sectors ; ///< Size in sectors of the reserved area.
uint8_t fat_copies ; ///< Number of FATs. Typically two for redundancy, but according to Microsoft it can be one for some small storage devices.
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.
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.
uint8_t media_type ; ///< 0xf8 should be used for fixed disks and 0xf0 for removable.
uint16_t sector_per_fat ; ///< 16-bit size in sectors of each FAT for FAT12 and FAT16. For FAT32, this field is 0.
uint16_t sector_per_track ; ///< Sectors per track of storage device.
uint16_t head_num ; ///< Number of heads in storage device.
uint32_t not_used1 ; ///< Number of sectors before the start of partition.
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.
// Extended BPB
uint8_t drive_number ; ///< Physical drive number (0x00 for (first) removable media, 0x80 for (first) fixed disk
uint8_t not_used3 ; ///< Some OS uses this as drive letter (e.g 0 = C:, 1 = D: etc ...), should be 0 when formatted
uint8_t ext_boot_signature ; ///< should be 0x29
uint32_t volume_id ; ///< Volume serial number, which some versions of Windows will calculate based on the creation date and time.
uint8_t volume_label[11] ;
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.
// uint8_t not_used4[448] ;
// uint16_t signature ; ///< Signature value (0xAA55).
}fat12_boot_sector_t;
VERIFY_STATIC(sizeof(fat12_boot_sector_t) == 62, "size is not correct");
typedef ATTR_PACKED_STRUCT(struct) {
uint8_t name[11];
ATTR_PACKED_STRUCT(struct){
uint8_t readonly : 1;
uint8_t hidden : 1;
uint8_t system : 1;
uint8_t volume_label : 1;
uint8_t directory : 1;
uint8_t archive : 1;
} attr; // Long File Name = 0x0f
uint8_t reserved;
uint8_t created_time_tenths_of_seconds;
uint16_t created_time;
uint16_t created_date;
uint16_t accessed_date;
uint16_t cluster_high;
uint16_t written_time;
uint16_t written_date;
uint16_t cluster_low;
uint32_t file_size;
}fat_dirent_t;
VERIFY_STATIC(sizeof(fat_dirent_t) == 32, "size is not correct");
fat12_boot_sector_t const _boot_sect =
{
.jump_code = { 0xEB, 0xFE, 0x90 },
@ -428,10 +461,10 @@ fat12_boot_sector_t const _boot_sect =
.reserved_sectors = 1,
.fat_copies = 1,
.root_entry_count = 16*8,
.root_entry_count = (ROOT_DIR_SECTOR*MSC_FLASH_BLOCK_SIZE)/32,
.sector_count = MSC_FLASH_BLOCK_NUM,
.media_type = 0xf8, // fixed disk
.sector_per_fat = 7,
.sector_per_fat = SECTORS_PER_FAT,
.sector_per_track = 1,
.head_num = 1,
.not_used1 = 0,
@ -466,22 +499,6 @@ fat12_boot_sector_t const _boot_sect =
* |_____________|
*/
static inline bool fat12_formatted(void)
{
return false;
// const uint8_t* boot_sect = (uint8_t* ) lba2addr(0);
//return (boot_sect[510] == 0x55) && (boot_sect[511] == 0xAA);
}
static void fat12_write_sector(uint32_t sect, uint8_t const* buf, uint32_t bufsize)
{
uint32_t addr = lba2addr(sect);
nrf_nvmc_page_erase( addr );
nrf_nvmc_write_words(addr, (uint32_t const*) buf, bufsize/4);
}
const char infoUf2File[] = //
"UF2 Bootloader " UF2_VERSION "\r\n"
"Model: " PRODUCT_NAME "\r\n"
@ -512,37 +529,42 @@ static const struct TextFile info[] = {
static void fat12_mkfs(void)
{
memclr_(_page_cached, sizeof(_page_cached));
varclr_(&_disk_ram);
/*------------- Sector 0: Boot Sector -------------*/
memcpy(_page_cached, &_boot_sect, sizeof(_boot_sect));
_page_cached[510] = 0x55;
_page_cached[511] = 0xAA;
_disk_ram.boot = _boot_sect;
_disk_ram.signature = 0xAA55;
//------------- Sector 1: FAT12 Table -------------//
// first 2 entries are FF8 and FF8,
// 3rd entry is cluster end of readme file FFF, 4th is unused 000
memcpy(_page_cached+MSC_FLASH_BLOCK_SIZE, "\xF8\x8F\xFF\xFF\x0F\x00", 6);
// Dir entry 0 & 1 are always FF8 and FF8
fat12_dirpair_t* dirpair;
// Erase and Write first cluster.
fat12_write_sector(0, _page_cached, FL_PAGE_SIZE);
dirpair = (fat12_dirpair_t*) _disk_ram.fat;
dirpair->dir0 = dirpair->dir1 = 0xFF8;
//------------- Root Directory cluster -------------//
memclr_(_page_cached, sizeof(_page_cached));
fat_dirent_t* p_entry = (fat_dirent_t*) _page_cached;
// Dir entry 2 & 3 are FFF (end) of info and index since their size are less than 512
dirpair = (fat12_dirpair_t*) (_disk_ram.fat+3);
dirpair->dir0 = dirpair->dir1 = 0xFFF;
// Dir entry chain for uf2 file
dirpair = (fat12_dirpair_t*) (_disk_ram.fat+6);
dirpair->dir0 = 0xFFF;
dirpair->dir1 = 0x000;
//------------- Root Directory -------------//
// first entry is volume label
(*p_entry) = (fat_dirent_t)
_disk_ram.root.dirent[0] = (fat_dirent_t)
{
.name = MSC_FLASH_VOL_LABEL,
.attr.volume_label = 1,
};
p_entry++; // next entry
uint16_t data_cluster = 2; // logical data cluster always start from 2
for(int i=0; i<arrcount_(info); i++)
{
(*p_entry) = (fat_dirent_t)
fat_dirent_t* p_dir = _disk_ram.root.dirent+1+i;
(*p_dir) = (fat_dirent_t)
{
.name = { 0 },
@ -563,25 +585,21 @@ static void fat12_mkfs(void)
.file_size = strlen(info[i].content)
};
memcpy(p_entry->name, info[i].name, 11);
memcpy(p_dir->name, info[i].name, 11);
data_cluster++;
p_entry++;
}
// Erase and Write cluster.
fat12_write_sector(8, _page_cached, FL_PAGE_SIZE);
//------------- Data Contents -------------//
memclr_(_page_cached, sizeof(_page_cached));
for(int i=0; i<arrcount_(info); i++)
{
memcpy(_page_cached + i*512, info[i].content, strlen(info[i].content));
}
// Erase and Write data cluster.
fat12_write_sector(16, _page_cached, FL_PAGE_SIZE);
// memclr_(_page_cached, sizeof(_page_cached));
//
// for(int i=0; i<arrcount_(info); i++)
// {
// memcpy(_page_cached + i*512, info[i].content, strlen(info[i].content));
// }
//
// // Erase and Write data cluster.
// fat12_write_sector(16, _page_cached, FL_PAGE_SIZE);
}
#endif

1
src/usb/msc_uf2.h
View File

@ -54,7 +54,6 @@
#define MSC_FLASH_BLOCK_SIZE 512
#define MSC_FLASH_BLOCK_NUM (MSC_FLASH_SIZE/MSC_FLASH_BLOCK_SIZE)
VERIFY_STATIC( MSC_FLASH_ADDR_START+MSC_FLASH_SIZE == BOOTLOADER_REGION_START-DFU_APP_DATA_RESERVED, );
// must be 11 bytes padded with space