mirror of
https://github.com/d0k3/GodMode9.git
synced 2025-06-26 13:42:47 +00:00
283 lines
9.8 KiB
C
283 lines
9.8 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2014 */
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/*-----------------------------------------------------------------------*/
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/* If a working storage control module is available, it should be */
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/* attached to the FatFs via a glue function rather than modifying it. */
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/* This is an example of glue functions to attach various exsisting */
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/* storage control modules to the FatFs module with a defined API. */
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/*-----------------------------------------------------------------------*/
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#include "diskio.h" /* FatFs lower layer API */
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#include "image.h"
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#include "ramdrive.h"
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#include "nand.h"
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#include "sdmmc.h"
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#define FREE_MIN_SECTORS 0x10000 // minimum sectors for the free drive to appear
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#define FPDRV(pdrv) (((pdrv >= 7) && !nand_type_img) ? pdrv + 3 : pdrv)
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#define PART_TYPE(pdrv) (DriveInfo[FPDRV(pdrv)].type)
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#define PART_SUBTYPE(pdrv) (DriveInfo[FPDRV(pdrv)].subtype)
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#define NAND_TYPE(type) ((type == TYPE_SYSNAND) ? nand_type_sys : (type == TYPE_EMUNAND) ? nand_type_emu : (type == TYPE_IMGNAND) ? nand_type_img : 0)
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#define TYPE_NONE 0
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#define TYPE_SYSNAND NAND_SYSNAND
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#define TYPE_EMUNAND NAND_EMUNAND
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#define TYPE_IMGNAND NAND_IMGNAND
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#define TYPE_SDCARD (1UL<<4)
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#define TYPE_IMAGE (1UL<<5)
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#define TYPE_RAMDRV (1UL<<6)
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#define SUBTYPE_CTRN 0
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#define SUBTYPE_CTRN_N 1
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#define SUBTYPE_CTRN_NO 2
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#define SUBTYPE_TWLN 3
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#define SUBTYPE_TWLP 4
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#define SUBTYPE_FREE 5
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#define SUBTYPE_FREE_N 6
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#define SUBTYPE_NONE 7
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typedef struct {
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BYTE type;
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BYTE subtype;
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} FATpartition;
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typedef struct {
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DWORD offset;
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DWORD size;
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BYTE keyslot;
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} SubtypeDesc;
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FATpartition DriveInfo[13] = {
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{ TYPE_SDCARD, SUBTYPE_NONE }, // 0 - SDCARD
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{ TYPE_SYSNAND, SUBTYPE_CTRN }, // 1 - SYSNAND CTRNAND
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{ TYPE_SYSNAND, SUBTYPE_TWLN }, // 2 - SYSNAND TWLN
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{ TYPE_SYSNAND, SUBTYPE_TWLP }, // 3 - SYSNAND TWLP
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{ TYPE_EMUNAND, SUBTYPE_CTRN }, // 4 - EMUNAND CTRNAND
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{ TYPE_EMUNAND, SUBTYPE_TWLN }, // 5 - EMUNAND TWLN
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{ TYPE_EMUNAND, SUBTYPE_TWLP }, // 6 - EMUNAND TWLP
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{ TYPE_IMGNAND, SUBTYPE_CTRN }, // 7 - IMGNAND CTRNAND
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{ TYPE_IMGNAND, SUBTYPE_TWLN }, // 8 - IMGNAND TWLN
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{ TYPE_IMGNAND, SUBTYPE_TWLP }, // 9 - IMGNAND TWLP
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{ TYPE_IMAGE, SUBTYPE_NONE }, // X - IMAGE
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{ TYPE_SYSNAND, SUBTYPE_FREE }, // Y - SYSNAND BONUS
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{ TYPE_RAMDRV, SUBTYPE_NONE } // Z - RAMDRIVE
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};
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SubtypeDesc SubTypes[7] = {
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{ 0x05C980, 0x17AE80, 0x04 }, // O3DS CTRNAND
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{ 0x05C980, 0x20F680, 0x05 }, // N3DS CTRNAND
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{ 0x05C980, 0x20F680, 0x04 }, // N3DS CTRNAND (downgraded)
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{ 0x000097, 0x047DA9, 0x03 }, // TWLN
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{ 0x04808D, 0x0105B3, 0x03 }, // TWLP
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{ 0x1D7800, 0x000000, 0xFF }, // O3DS FREE SPACE
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{ 0x26C000, 0x000000, 0xFF } // N3DS FREE SPACE
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};
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static BYTE nand_type_sys = 0;
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static BYTE nand_type_emu = 0;
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static BYTE nand_type_img = 0;
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/*-----------------------------------------------------------------------*/
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/* Get Drive Subtype helper */
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/*-----------------------------------------------------------------------*/
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static inline SubtypeDesc* get_subtype_desc(
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__attribute__((unused))
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BYTE pdrv /* Physical drive number to identify the drive */
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)
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{
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BYTE type = PART_TYPE(pdrv);
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BYTE subtype = PART_SUBTYPE(pdrv);
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BYTE nand_type = NAND_TYPE(type);
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if (subtype == SUBTYPE_NONE) {
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return NULL;
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} else if ((subtype == SUBTYPE_CTRN) && (nand_type != NAND_TYPE_O3DS)) {
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subtype = (nand_type == NAND_TYPE_N3DS) ? SUBTYPE_CTRN_N : SUBTYPE_CTRN_NO;
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} else if ((subtype == SUBTYPE_FREE) && (nand_type != NAND_TYPE_O3DS)) {
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subtype = SUBTYPE_FREE_N;
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}
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return &(SubTypes[subtype]);
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}
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/*-----------------------------------------------------------------------*/
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/* Get Drive Status */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_status (
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__attribute__((unused))
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BYTE pdrv /* Physical drive number to identify the drive */
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)
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{
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return RES_OK;
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}
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/*-----------------------------------------------------------------------*/
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/* Initialize a Drive */
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/*-----------------------------------------------------------------------*/
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DSTATUS disk_initialize (
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__attribute__((unused))
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BYTE pdrv /* Physical drive number to identify the drive */
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)
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{
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if (pdrv == 0) { // a mounted SD card is the preriquisite for everything else
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if (sdmmc_sdcard_init() != 0) return STA_NOINIT|STA_NODISK;
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} else if (pdrv < 4) {
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nand_type_sys = CheckNandType(NAND_SYSNAND);
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if (!nand_type_sys) return STA_NOINIT|STA_NODISK;
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} else if (pdrv < 7) {
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if (!GetNandSizeSectors(NAND_EMUNAND)) return STA_NOINIT|STA_NODISK;
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nand_type_emu = CheckNandType(NAND_EMUNAND);
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if (!nand_type_emu) return STA_NOINIT|STA_NODISK;
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} else if (pdrv < 10) {
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UINT mount_state = GetMountState();
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nand_type_img = (mount_state & IMG_NAND) ? CheckNandType(NAND_IMGNAND) : 0;
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if (!nand_type_img) {
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if ((pdrv == 7) && !(mount_state & IMG_FAT)) return STA_NOINIT|STA_NODISK;
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else if ((pdrv == 8) && (!CheckNandType(NAND_SYSNAND) ||
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GetNandUnusedSectors(NAND_SYSNAND) < FREE_MIN_SECTORS)) return STA_NOINIT|STA_NODISK;
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else if (pdrv == 9) InitRamDrive();
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}
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}
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return RES_OK;
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}
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/*-----------------------------------------------------------------------*/
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/* Read Sector(s) */
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/*-----------------------------------------------------------------------*/
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DRESULT disk_read (
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__attribute__((unused))
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BYTE pdrv, /* Physical drive number to identify the drive */
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BYTE *buff, /* Data buffer to store read data */
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DWORD sector, /* Sector address in LBA */
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UINT count /* Number of sectors to read */
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)
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{
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BYTE type = PART_TYPE(pdrv);
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if (type == TYPE_NONE) {
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return RES_PARERR;
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} else if (type == TYPE_SDCARD) {
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if (sdmmc_sdcard_readsectors(sector, count, buff))
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return RES_PARERR;
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} else if (type == TYPE_IMAGE) {
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if (ReadImageSectors(buff, sector, count))
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return RES_PARERR;
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} else if (type == TYPE_RAMDRV) {
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if (ReadRamDriveSectors(buff, sector, count))
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return RES_PARERR;
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} else {
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SubtypeDesc* subtype = get_subtype_desc(pdrv);
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BYTE keyslot = subtype->keyslot;
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DWORD isector = subtype->offset + sector;
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if (ReadNandSectors(buff, isector, count, keyslot, type))
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return RES_PARERR;
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}
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return RES_OK;
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}
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/*-----------------------------------------------------------------------*/
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/* Write Sector(s) */
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/*-----------------------------------------------------------------------*/
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#if _USE_WRITE
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DRESULT disk_write (
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__attribute__((unused))
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BYTE pdrv, /* Physical drive number to identify the drive */
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const BYTE *buff, /* Data to be written */
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DWORD sector, /* Sector address in LBA */
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UINT count /* Number of sectors to write */
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)
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{
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BYTE type = PART_TYPE(pdrv);
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if (type == TYPE_NONE) {
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return RES_PARERR;
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} else if (type == TYPE_SDCARD) {
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if (sdmmc_sdcard_writesectors(sector, count, (BYTE *)buff))
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return RES_PARERR;
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} else if (type == TYPE_IMAGE) {
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if (WriteImageSectors(buff, sector, count))
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return RES_PARERR;
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} else if (type == TYPE_RAMDRV) {
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if (WriteRamDriveSectors(buff, sector, count))
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return RES_PARERR;
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} else {
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SubtypeDesc* subtype = get_subtype_desc(pdrv);
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BYTE keyslot = subtype->keyslot;
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DWORD isector = subtype->offset + sector;
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if (WriteNandSectors(buff, isector, count, keyslot, type))
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return RES_PARERR; // unstubbed!
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}
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return RES_OK;
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}
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#endif
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/*-----------------------------------------------------------------------*/
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/* Miscellaneous Functions */
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/*-----------------------------------------------------------------------*/
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#if _USE_IOCTL
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DRESULT disk_ioctl (
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__attribute__((unused))
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BYTE pdrv, /* Physical drive number (0..) */
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__attribute__((unused))
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BYTE cmd, /* Control code */
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__attribute__((unused))
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void *buff /* Buffer to send/receive control data */
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)
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{
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BYTE type = PART_TYPE(pdrv);
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switch (cmd) {
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case GET_SECTOR_SIZE:
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*((DWORD*) buff) = 0x200;
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return RES_OK;
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case GET_SECTOR_COUNT:
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if (type == TYPE_SDCARD) { // SD card
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*((DWORD*) buff) = getMMCDevice(1)->total_size;
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} else if (type == TYPE_IMAGE) { // FAT image
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*((DWORD*) buff) = GetMountSize() / 0x200;
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} else if (type == TYPE_RAMDRV) { // RAM drive
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*((DWORD*) buff) = GetRamDriveSize() / 0x200;
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} else if ((type == TYPE_SYSNAND) && (PART_SUBTYPE(pdrv) == SUBTYPE_FREE)) { // SysNAND free area
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*((DWORD*) buff) = getMMCDevice(0)->total_size - get_subtype_desc(pdrv)->offset;
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} else if (type != TYPE_NONE) { // NAND
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*((DWORD*) buff) = get_subtype_desc(pdrv)->size;
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}
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return RES_OK;
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case GET_BLOCK_SIZE:
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*((DWORD*) buff) = ((type == TYPE_IMAGE) || (type == TYPE_RAMDRV)) ? 0x1 : 0x2000;
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return RES_OK;
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case CTRL_SYNC:
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if ((type == TYPE_IMAGE) || (type == TYPE_IMGNAND))
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SyncImage();
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// nothing else to do here - sdmmc.c handles the rest
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return RES_OK;
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}
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return RES_PARERR;
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}
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#endif
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