mirror of
https://github.com/d0k3/GodMode9.git
synced 2025-06-26 21:52:48 +00:00
269 lines
9.4 KiB
C
269 lines
9.4 KiB
C
/*-----------------------------------------------------------------------*/
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/* Low level disk I/O module skeleton for FatFs (C)ChaN, d0k3, 2019 */
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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 "ff.h" /* Obtains integer types */
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#include "diskio.h" /* Declarations of disk functions */
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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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#include "rtc.h"
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#define FREE_MIN_SECTORS 0x2000 // minimum sectors for the free drive to appear (4MB)
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#define FPDRV(pdrv) (((pdrv >= 7) && !imgnand_mode) ? pdrv + 3 : pdrv)
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#define PART_INFO(pdrv) (DriveInfo + FPDRV(pdrv))
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#define PART_TYPE(pdrv) (DriveInfo[FPDRV(pdrv)].type)
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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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DWORD offset;
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DWORD size;
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BYTE keyslot;
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} FATpartition;
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FATpartition DriveInfo[13] = {
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{ TYPE_SDCARD, SUBTYPE_NONE, 0, 0, 0xFF }, // 0 - SDCARD
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{ TYPE_SYSNAND, SUBTYPE_CTRN, 0, 0, 0xFF }, // 1 - SYSNAND CTRNAND
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{ TYPE_SYSNAND, SUBTYPE_TWLN, 0, 0, 0xFF }, // 2 - SYSNAND TWLN
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{ TYPE_SYSNAND, SUBTYPE_TWLP, 0, 0, 0xFF }, // 3 - SYSNAND TWLP
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{ TYPE_EMUNAND, SUBTYPE_CTRN, 0, 0, 0xFF }, // 4 - EMUNAND CTRNAND
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{ TYPE_EMUNAND, SUBTYPE_TWLN, 0, 0, 0xFF }, // 5 - EMUNAND TWLN
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{ TYPE_EMUNAND, SUBTYPE_TWLP, 0, 0, 0xFF }, // 6 - EMUNAND TWLP
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{ TYPE_IMGNAND, SUBTYPE_CTRN, 0, 0, 0xFF }, // 7 - IMGNAND CTRNAND
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{ TYPE_IMGNAND, SUBTYPE_TWLN, 0, 0, 0xFF }, // 8 - IMGNAND TWLN
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{ TYPE_IMGNAND, SUBTYPE_TWLP, 0, 0, 0xFF }, // 9 - IMGNAND TWLP
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{ TYPE_IMAGE, SUBTYPE_NONE, 0, 0, 0xFF }, // X - IMAGE
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{ TYPE_SYSNAND, SUBTYPE_FREE, 0, 0, 0xFF }, // Y - SYSNAND BONUS
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{ TYPE_RAMDRV, SUBTYPE_NONE, 0, 0, 0xFF } // Z - RAMDRIVE
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};
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static BYTE imgnand_mode = 0x00;
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/*-----------------------------------------------------------------------*/
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/* Get current FAT time */
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/*-----------------------------------------------------------------------*/
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DWORD get_fattime( void ) {
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DsTime dstime;
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get_dstime(&dstime);
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DWORD fattime =
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((DSTIMEGET(&dstime, bcd_s)&0x3F) >> 1 ) |
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((DSTIMEGET(&dstime, bcd_m)&0x3F) << 5 ) |
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((DSTIMEGET(&dstime, bcd_h)&0x3F) << 11) |
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((DSTIMEGET(&dstime, bcd_D)&0x1F) << 16) |
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((DSTIMEGET(&dstime, bcd_M)&0x0F) << 21) |
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(((DSTIMEGET(&dstime, bcd_Y)+(2000-1980))&0x7F) << 25);
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return fattime;
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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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imgnand_mode = (GetMountState() & IMG_NAND) ? 0x01 : 0x00;
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FATpartition* fat_info = PART_INFO(pdrv);
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BYTE type = PART_TYPE(pdrv);
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fat_info->offset = fat_info->size = 0;
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fat_info->keyslot = 0xFF;
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if (type == TYPE_SDCARD) {
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if (sdmmc_sdcard_init() != 0) return STA_NOINIT|STA_NODISK;
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fat_info->size = getMMCDevice(1)->total_size;
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} else if ((type == TYPE_SYSNAND) || (type == TYPE_EMUNAND) || (type == TYPE_IMGNAND)) {
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NandPartitionInfo nprt_info;
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if ((type == TYPE_EMUNAND) && !GetNandSizeSectors(NAND_EMUNAND)) // size check for EmuNAND
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return STA_NOINIT|STA_NODISK;
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if ((fat_info->subtype == SUBTYPE_CTRN) &&
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(GetNandPartitionInfo(&nprt_info, NP_TYPE_STD, NP_SUBTYPE_CTR, 0, type) != 0) &&
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(GetNandPartitionInfo(&nprt_info, NP_TYPE_STD, NP_SUBTYPE_CTR_N, 0, type) != 0)) {
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return STA_NOINIT|STA_NODISK;
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} else if ((fat_info->subtype == SUBTYPE_TWLN) &&
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(GetNandPartitionInfo(&nprt_info, NP_TYPE_FAT, NP_SUBTYPE_TWL, 0, type) != 0)) {
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return STA_NOINIT|STA_NODISK;
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} else if ((fat_info->subtype == SUBTYPE_TWLP) &&
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(GetNandPartitionInfo(&nprt_info, NP_TYPE_FAT, NP_SUBTYPE_TWL, 1, type) != 0)) {
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return STA_NOINIT|STA_NODISK;
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} else if ((fat_info->subtype == SUBTYPE_FREE) &&
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((GetNandPartitionInfo(&nprt_info, NP_TYPE_BONUS, NP_SUBTYPE_CTR, 0, type) != 0) ||
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(nprt_info.count < FREE_MIN_SECTORS))) {
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return STA_NOINIT|STA_NODISK;
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}
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fat_info->offset = nprt_info.sector;
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fat_info->size = nprt_info.count;
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fat_info->keyslot = nprt_info.keyslot;
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} else if (type == TYPE_IMAGE) {
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if (!(GetMountState() & IMG_FAT)) return STA_NOINIT|STA_NODISK;
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fat_info->size = (GetMountSize() + 0x1FF) / 0x200;
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} else if (type == TYPE_RAMDRV) {
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InitRamDrive();
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fat_info->size = (GetRamDriveSize() + 0x1FF) / 0x200;
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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) != 0)
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return RES_ERROR;
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} else if (type == TYPE_IMAGE) {
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if (ReadImageSectors(buff, sector, count) != 0)
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return RES_ERROR;
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} else if (type == TYPE_RAMDRV) {
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if (ReadRamDriveSectors(buff, sector, count) != 0)
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return RES_ERROR;
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} else {
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FATpartition* fat_info = PART_INFO(pdrv);
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if (ReadNandSectors(buff, fat_info->offset + sector, count, fat_info->keyslot, type) != 0)
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return RES_ERROR;
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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) != 0)
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return RES_ERROR;
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} else if (type == TYPE_IMAGE) {
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if (WriteImageSectors(buff, sector, count) != 0)
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return RES_ERROR;
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} else if (type == TYPE_RAMDRV) {
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if (WriteRamDriveSectors(buff, sector, count) != 0)
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return RES_ERROR;
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} else {
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FATpartition* fat_info = PART_INFO(pdrv);
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if (WriteNandSectors(buff, fat_info->offset + sector, count, fat_info->keyslot, type) != 0)
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return RES_ERROR; // 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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FATpartition* fat_info = PART_INFO(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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*((DWORD*) buff) = fat_info->size;
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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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