mirror of
https://github.com/wiiu-env/wiiu-nanddumper-payload.git
synced 2024-11-05 11:15:09 +01:00
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
#include <stdio.h>
|
|
#include "types.h"
|
|
#include "imports.h"
|
|
#include "devices.h"
|
|
#include "sdio.h"
|
|
#include "text.h"
|
|
#include "sd_fat.h"
|
|
|
|
unsigned char sd_io_buffer[0x40000] __attribute__((aligned(0x40))) __attribute__((section(".io_buffer")));
|
|
unsigned int fat_sector = 0;
|
|
|
|
#define PARTITION_TYPE_FAT32 0x0c
|
|
#define PARTITION_TYPE_FAT32_CHS 0x0b
|
|
|
|
#define MBR_SIGNATURE 0x55AA
|
|
#define EBR_SIGNATURE MBR_SIGNATURE
|
|
|
|
#define PARTITION_BOOTABLE 0x80 /* Bootable (active) */
|
|
#define PARTITION_NONBOOTABLE 0x00 /* Non-bootable */
|
|
#define PARTITION_TYPE_GPT 0xEE /* Indicates that a GPT header is available */
|
|
|
|
typedef struct _PARTITION_RECORD {
|
|
u8 status; /* Partition status; see above */
|
|
u8 chs_start[3]; /* Cylinder-head-sector address to first block of partition */
|
|
u8 type; /* Partition type; see above */
|
|
u8 chs_end[3]; /* Cylinder-head-sector address to last block of partition */
|
|
u32 lba_start; /* Local block address to first sector of partition */
|
|
u32 block_count; /* Number of blocks in partition */
|
|
} __attribute__((__packed__)) PARTITION_RECORD;
|
|
|
|
|
|
typedef struct _MASTER_BOOT_RECORD {
|
|
u8 code_area[446]; /* Code area; normally empty */
|
|
PARTITION_RECORD partitions[4]; /* 4 primary partitions */
|
|
u16 signature; /* MBR signature; 0xAA55 */
|
|
} __attribute__((__packed__)) MASTER_BOOT_RECORD;
|
|
|
|
int sd_fat_read(unsigned long sector, unsigned char *buffer, unsigned long sector_count)
|
|
{
|
|
// It seems that sdcard_readwrite overwrite more bytes than requested with 0xff.... So I use io_buffer to read it.
|
|
if (sector_count * SDIO_BYTES_PER_SECTOR > sizeof(sd_io_buffer)) return 0;
|
|
int result = sdcard_readwrite(SDIO_READ, sd_io_buffer, sector_count, SDIO_BYTES_PER_SECTOR, fat_sector + sector, NULL, DEVICE_ID_SDCARD_PATCHED);
|
|
if (result) return 0;
|
|
memcpy(buffer, sd_io_buffer, sector_count * SDIO_BYTES_PER_SECTOR);
|
|
return 1;
|
|
}
|
|
|
|
int sd_fat_write(unsigned long sector, unsigned char *buffer, unsigned long sector_count)
|
|
{
|
|
if (sector_count * SDIO_BYTES_PER_SECTOR > sizeof(sd_io_buffer)) return 0;
|
|
int result = sdcard_readwrite(SDIO_WRITE, buffer, sector_count, SDIO_BYTES_PER_SECTOR, fat_sector + sector, NULL, DEVICE_ID_SDCARD_PATCHED);
|
|
return result ? 0 : 1;
|
|
}
|
|
|
|
int InitSDCardFAT32()
|
|
{
|
|
MASTER_BOOT_RECORD *mbr = (MASTER_BOOT_RECORD*)sd_io_buffer;
|
|
memset(mbr, 0, SDIO_BYTES_PER_SECTOR);
|
|
|
|
int result = sdcard_readwrite(SDIO_READ, mbr, 1, SDIO_BYTES_PER_SECTOR, 0, NULL, DEVICE_ID_SDCARD_PATCHED);
|
|
if(result != 0)
|
|
{
|
|
_printf(20, 40, "SD card read failed %i", result);
|
|
return result;
|
|
}
|
|
|
|
if (mbr->signature != MBR_SIGNATURE) {
|
|
_printf(20, 40, "SD not MBR");
|
|
return -1;
|
|
}
|
|
|
|
if (mbr->partitions[0].status != PARTITION_BOOTABLE && mbr->partitions[0].status != PARTITION_NONBOOTABLE) {
|
|
_printf(20, 40, "Invalid paritition status");
|
|
return -1;
|
|
}
|
|
|
|
if (mbr->partitions[0].type != PARTITION_TYPE_FAT32 && mbr->partitions[0].type != PARTITION_TYPE_FAT32_CHS) {
|
|
_printf(20, 40, "First paritition not FAT32");
|
|
return -1;
|
|
}
|
|
|
|
fat_sector = le32(mbr->partitions[0].lba_start);
|
|
|
|
fl_init();
|
|
|
|
result = fl_attach_media(sd_fat_read, sd_fat_write);
|
|
if (result != FAT_INIT_OK)
|
|
{
|
|
_printf(20, 40, "FAT32 attach failed %i", result);
|
|
return result;
|
|
}
|
|
|
|
return 0;
|
|
}
|