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Atmosphere/fusee/fusee-secondary/src/lib/fatfs/diskio.c

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2018-05-04 18:21:15 +01:00
/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs (C)ChaN, 2016 */
/*-----------------------------------------------------------------------*/
/* If a working storage control module is available, it should be */
/* attached to the FatFs via a glue function rather than modifying it. */
/* This is an example of glue functions to attach various exsisting */
/* storage control modules to the FatFs module with a defined API. */
/*-----------------------------------------------------------------------*/
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#include <stdbool.h>
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#include <string.h>
#include "diskio.h" /* FatFs lower layer API */
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#include "../../sdmmc.h"
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#include "../../hwinit.h"
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/* Global sd struct. */
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struct mmc g_sd_mmc = {0};
static bool g_sd_initialized = false;
static bool g_ahb_redirect_enabled = false;
/*
Uncomment if needed:
struct mmc nand_mmc = {0};
static bool g_nand_initialized = false;
*/
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/*-----------------------------------------------------------------------*/
/* Get Drive Status */
/*-----------------------------------------------------------------------*/
DSTATUS disk_status (
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
return 0;
}
/*-----------------------------------------------------------------------*/
/* Inidialize a Drive */
/*-----------------------------------------------------------------------*/
DSTATUS disk_initialize (
BYTE pdrv /* Physical drive nmuber to identify the drive */
)
{
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if (!g_ahb_redirect_enabled) {
mc_enable_ahb_redirect();
g_ahb_redirect_enabled = true;
}
switch (pdrv) {
case 0: {
if (!g_sd_initialized) {
int rc = sdmmc_init(&g_sd_mmc, SWITCH_MICROSD);
if (rc == 0) {
g_sd_initialized = true;
return 0;
} else {
return rc;
}
} else {
return 0;
}
}
default:
return STA_NODISK;
}
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}
/*-----------------------------------------------------------------------*/
/* Read Sector(s) */
/*-----------------------------------------------------------------------*/
DRESULT disk_read (
BYTE pdrv, /* Physical drive nmuber to identify the drive */
BYTE *buff, /* Data buffer to store read data */
DWORD sector, /* Start sector in LBA */
UINT count /* Number of sectors to read */
)
{
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switch (pdrv) {
case 0:
return sdmmc_read(&g_sd_mmc, buff, sector, count) == 0 ? RES_OK : RES_ERROR;
default:
return RES_PARERR;
}
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}
/*-----------------------------------------------------------------------*/
/* Write Sector(s) */
/*-----------------------------------------------------------------------*/
DRESULT disk_write (
BYTE pdrv, /* Physical drive nmuber to identify the drive */
const BYTE *buff, /* Data to be written */
DWORD sector, /* Start sector in LBA */
UINT count /* Number of sectors to write */
)
{
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switch (pdrv) {
case 0:
return sdmmc_write(&g_sd_mmc, buff, sector, count) == 0 ? RES_OK : RES_ERROR;
default:
return RES_PARERR;
}
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}
/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions */
/*-----------------------------------------------------------------------*/
DRESULT disk_ioctl (
BYTE pdrv, /* Physical drive nmuber (0..) */
BYTE cmd, /* Control code */
void *buff /* Buffer to send/receive control data */
)
{
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return 0;
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}