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268 lines
7.4 KiB
C
268 lines
7.4 KiB
C
/*
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* Copyright (c) 2023, Artinchip Technology Co., Ltd
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Wu Dehuang <dehuang.wu@artinchip.com>
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*/
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#ifndef _FAT_FS_H
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#define _FAT_FS_H
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#include <aic_core.h>
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#include <config_parse.h>
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#define INVALID_VAL 0xFFFFFFFFU
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#define CONFIG_SYS_TEXT_BASE 0x40000000
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#define IMAGE_HEADER_SIZE 0x40
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#define BOOTLOADER_BUF_ADDR (CONFIG_SYS_TEXT_BASE - IMAGE_HEADER_SIZE)
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#define SD_BOOT_HEAD_BLK_CNT (1)
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/* Disk Partition Table */
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#define DPT_START 0x1be
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/* BIOS Parameter Block
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* BPB locate in DBR(DOS Boot Record), 0x0B~0x52
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*/
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#define BPB_START 0x0b
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#define BS_FilSysType32 82 /* FAT32: Filesystem type string (8-byte) */
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#define _TO_U16(x, s) ((u16)(x[s+1]<<8|x[s]))
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#define _TO_U32(x, s) ((u32)(x[s+3]<<24|x[s+2]<<16|x[s+1]<<8|x[s]))
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#define BPB_SECT_SIZE(x) _TO_U16(x, 0x0b)
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#define BPB_CLUS_SIZE(x) ((u8)(x[0x0d]))
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#define BPB_RESV_SECT_CNT(x) _TO_U16(x, 0x0e)
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#define BPB_FAT_NUM(x) ((u8)(x[0x10]))
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/* FAT32: FAT table size(sector) */
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#define BPB_FAT32_SIZE(x) _TO_U32(x, 0x24)
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//((u32)(x[0x27]<<24|x[0x26]>>16|x[0x25]<<8|x[0x24]))
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#define BPB_ROOT_ENTRY_CNT(x) _TO_U16(x, 0x11)
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#define BPB_ROOT_START_CLUS32(x) _TO_U32(x, 0x2c)
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/*
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* FAT32 will create short name dirent for long file name, to make compabtible
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* for old application
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*/
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#define SHT_DIR_Name_idx 0
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#define SHT_DIR_Name_Suffix_idx 8
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#define SHT_DIR_Attr(d) ((u8)d[0xB])
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#define SHT_DIR_StartCluster(d) ((u32)(d[0x15]<<24|d[0x14]<<16|d[0x1B]<<8|d[0x1A]))
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#define SHT_DIR_Filesize(d) _TO_U32(d, 0x1C)
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#define DIRENT_DEL 0xE5
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#define DIRENT_END 0x0
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#define DIR_ATTR_RW 0
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#define DIR_ATTR_RO 1
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#define DIR_ATTR_HIDDEN 2
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#define DIR_ATTR_SYSTEM 4
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#define DIR_ATTR_VOLUME 8
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#define DIR_ATTR_SUBDIR 16
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#define DIR_ATTR_ARCHIVE 32
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/* 1: Last dirent for LFN */
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#define LFN_DIR_Attr_Last(d) ((d[0] & 0x40) >> 6)
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#define LFN_DIR_Attr_Number(d) ((d[0] & 0x1F))
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#define LFN_DIR_Flag(d) (d[0xB] == 0x0F)
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#define LFN_DIR_StartCluster(d) _TO_U16(d, 0x1A)
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#define DIR_ENTRY_SIZE 32
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/*
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* One FAT item use 4 bytes
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*/
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#define MAX_FAT_ITEM_PER_SECT (LBA_SIZE >> 2)
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#define FAT32_MINIMAL_CLUS 65525
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#define FAT32_ENTRY_UNUSED 0x00000000U
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#define FAT32_ENTRY_LAST 0x0FFFFFFFU
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#define FAT32_ENTRY_BAD 0x0FFFFFF7U
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#define EXFAT_ENTRY_UNUSED 0x00000000U
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#define EXFAT_ENTRY_LAST 0xFFFFFFFFU
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#define EXFAT_ENTRY_BAD 0xFFFFFFF7U
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/*
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* Default Cluster size for FAT32:
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* Volume Size | Cluster Size
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* < 16MB | Not supported
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* 16MB ~ 64MB | 512B
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* 64MB ~ 128MB | 1KB
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* 128MB ~ 256MB | 2KB
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* 256MB ~ 8GB | 4KB
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* 8GB ~ 16GB | 8KB
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* 16GB ~ 32GB | 16KB
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* 32GB ~ 2TB | 32KB
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* > 2TB | Not Supported
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*
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* Default Cluster size for exFAT:
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* Volume Size | Cluster Size
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* 7MB ~ 256MB | 4KB
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* 256MB ~ 32GB | 32KB
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* 32GB ~ 256TB | 128KB
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* > 256TB | Not Supported
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*
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* FSBL image should not large than 256 KB, so here set MAX to 64
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*/
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#define IMG_MAX_CLUSTER 8192
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#define BOOTCFG_FILENAME "bootcfg.txt"
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#define BOOTCFG_NAME_LEN 11
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#define F_PARSE_NONE 0
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#define F_PARSE_LONG 1
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#define F_PARSE_SHORT 2
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#define TYPE_MBR_PARTITION 1
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#define TYPE_GPT_PARTITION 2
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#define TYPE_RAW_VOLUME_FAT32 3
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#define TYPE_RAW_VOLUME_EXFAT 4
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/* Macro for exFAT */
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#define BS_FilSysTypeEXFAT 3 /* EXFAT string, 8 bytes */
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#define BS_MUSTBEZERO 11 /* EXFAT, this field must be zero, 53 bytes */
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#define BS_MUSTBEZERO_LEN 53
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#define BS_FAT_OFFSET(x) _TO_U32(x, 80)
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#define BS_FAT_LEN(x) _TO_U32(x, 84)
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#define BS_CLUSTER_OFFSET(x) _TO_U32(x, 88)
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#define BS_CLUSTER_CNT(x) _TO_U32(x, 92)
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#define BS_ROOT_DIR_CLUS(x) _TO_U32(x, 96)
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#define BS_SECT_SHIFT(x) ((u8)(x[108]))
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#define BS_CLUS_SHIFT(x) ((u8)(x[109]))
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#define BS_FAT_NUM(x) ((u8)(x[110]))
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#define ENT_TYPE_IMPORTANCE_CRITICAL (0)
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#define ENT_TYPE_IMPORTANCE_BENIGN (1 << 5)
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#define ENT_TYPE_MSK_IMPORTANCE (1 << 5)
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#define ENT_TYPE_CATEGORY_PRIMARY (0)
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#define ENT_TYPE_CATEGORY_SECONDARY (1 << 6)
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#define ENT_TYPE_MSK_CATEGORY (1 << 6)
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#define ENT_TYPE_MSK_IN_USE (1 << 7)
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/* dentry types */
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#define TYPE_EXFAT_UNUSED 0x00 /* end of directory */
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#define TYPE_EXFAT_DELETE (~0x80)
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#define IS_EXFAT_DELETED(x) ((x) < 0x80) /* deleted file (0x01~0x7F) */
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#define TYPE_EXFAT_INVAL 0x80 /* invalid value */
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#define TYPE_EXFAT_BITMAP 0x81 /* allocation bitmap */
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#define TYPE_EXFAT_UPCASE 0x82 /* upcase table */
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#define TYPE_EXFAT_VOLUME 0x83 /* volume label */
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#define TYPE_EXFAT_FILE 0x85 /* file or dir */
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#define TYPE_EXFAT_GUID 0xA0
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#define TYPE_EXFAT_PADDING 0xA1
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#define TYPE_EXFAT_ACLTAB 0xA2
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#define TYPE_EXFAT_STREAM 0xC0 /* stream entry */
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#define TYPE_EXFAT_NAME 0xC1 /* file name entry */
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#define TYPE_EXFAT_ACL 0xC2 /* stream entry */
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#define FS_TYPE_FAT32 (0)
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#define FS_TYPE_EXFAT (1)
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/* Disk Partition Table Entry
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*
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* MBR first 446 bytes(Byte[0:445]) are reserved for boot code.
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* DPT 64 bytes, locate at Byte[446:509], 4 entries, 16 bytes per partition
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* MBR Identification Codes 2 bytes, Byte[510:511], value 0x55, 0xAA
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*
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* Partition Type:
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* 0x00: Empty partition table entry
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* 0x01: DOS FAT12
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* 0x04: DOS FAT16
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* 0x05: DOS3.3+extended partition
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* 0x06: DOS3.31+FAT16
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* 0x07: Maybe exFAT
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* 0x0B: Win95+FAT32
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* 0x0C: Win95+FAT32(using LBA-mode INT 13 extensions)
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* 0x0E: DOS FAT16(over 32MB, using INT 13 extensions)
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* 0x1B: Hidden Win95+FAT32
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* 0x1C: Hidden Win95+FAT32(using LBA-mode INT 13 extensions)
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*/
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struct mbr_dpt_entry {
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/* 0x80: This partition is activing; 0x00: Partition is not activing. */
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u8 boot_indicator;
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u8 start_head;
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u16 start_sector : 6;
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u16 start_cylinder : 10;
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/* Partition type: somewhere call it Operating system indicator. */
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u8 part_type;
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u8 end_head;
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u16 end_sector : 6;
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u16 end_cylinder : 10;
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/* Partition start LBA */
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u32 lba_start;
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/* Partition length: count of LBA */
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u32 lba_cnt;
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};
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struct gpt_header {
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u8 signature[8];
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u32 revision;
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u32 header_size;
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u32 header_crc32;
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u32 reserved1;
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u64 my_lba;
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u64 alternate_lba;
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u64 first_usable_lba;
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u64 last_usable_lba;
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u8 disk_guid[16];
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u64 partition_entry_lba;
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u32 num_partition_entries;
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u32 sizeof_partition_entry;
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u32 partition_entry_array_crc32;
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};
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struct gpt_entry {
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u8 partition_type_guid[16];
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u8 unique_partition_guid[16];
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u64 starting_lba;
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u64 ending_lba;
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u8 other[80]; // attr and part name
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};
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struct fat_file {
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char name[IMG_NAME_MAX_SIZ];
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u32 name_len;
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u32 size;
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u32 start_clus;
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u32 clus[IMG_MAX_CLUSTER];
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};
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struct fat_region {
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u32 fs_type;
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u32 start; /* Start sector offset */
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u32 size; /* Sector count */
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};
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struct clus_region {
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u32 start; /* Start sector offset */
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u32 size; /* Sector count per cluster */
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u32 root_dirent_cluster; /* Root directory cluster id */
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};
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#define BLK_DEV_TYPE_MMC 0
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#define BLK_DEV_TYPE_MSC 1
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struct blkdev {
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int type;
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void *priv;
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};
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struct fat_volume {
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struct blkdev *dev;
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struct fat_region fat;
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struct clus_region clus;
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u32 total_clus_sec;
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};
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struct dirent_cluster {
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struct fat_volume *vol;
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u32 clus_id;
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u32 sec_idx;
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};
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s32 aic_fat_read_file(char *filename, void *buf, ulong offset, ulong maxsize,
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ulong *actread);
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s32 aic_fat_set_blk_dev(int id, int type);
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#endif /* _FAT_FS_H */
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