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Add support for reading boot files from FAT partition on BOOT1/GPP/SD in that order

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Emummc config is read from boot partition, file based files still read from SD
This commit is contained in:
Christoph Baumann
2025-04-22 13:42:20 +02:00
parent 9d2ec42a9f
commit 5798dcde0d
14 changed files with 310 additions and 38 deletions
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70
bootloader/libs/fatfs/diskio.c
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@@ -7,11 +7,37 @@
/* storage control modules to the FatFs module with a defined API. */
/*-----------------------------------------------------------------------*/
#include <storage/sd.h>
#include <storage/sdmmc.h>
#include <string.h>
#include <bdk.h>
#include <libs/fatfs/diskio.h> /* FatFs lower layer API */
#include "ffconf.h"
static bool ensure_partition(BYTE pdrv){
u8 part;
switch(pdrv){
case FF_DEV_SD:
return true;
case FF_DEV_BOOT1:
case FF_DEV_BOOT1_1MB:
part = EMMC_BOOT1;
break;
case FF_DEV_GPP:
part = EMMC_GPP;
break;
default:
return false;
}
if(emmc_storage.partition != part){
return emmc_set_partition(part);
}
return true;
}
/*-----------------------------------------------------------------------*/
/* Get Drive Status */
@@ -43,7 +69,27 @@ DRESULT disk_read (
UINT count /* Number of sectors to read */
)
{
return sdmmc_storage_read(&sd_storage, sector, count, buff) ? RES_OK : RES_ERROR;
sdmmc_storage_t *storage = &sd_storage;
u32 actual_sector = sector;
switch(pdrv){
case FF_DEV_SD:
break;
case FF_DEV_BOOT1:
case FF_DEV_GPP:
storage = &emmc_storage;
break;
case FF_DEV_BOOT1_1MB:
storage = &emmc_storage;
actual_sector = sector + (0x100000 / 512);
break;
default:
return RES_ERROR;
}
ensure_partition(pdrv);
return sdmmc_storage_read(storage, actual_sector, count, buff) ? RES_OK : RES_ERROR;
}
/*-----------------------------------------------------------------------*/
@@ -56,7 +102,27 @@ DRESULT disk_write (
UINT count /* Number of sectors to write */
)
{
return sdmmc_storage_write(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
sdmmc_storage_t *storage = &sd_storage;
u32 actual_sector = sector;
switch(pdrv){
case FF_DEV_SD:
break;
case FF_DEV_BOOT1:
case FF_DEV_GPP:
storage = &emmc_storage;
break;
case FF_DEV_BOOT1_1MB:
storage = &emmc_storage;
actual_sector = sector + (0x100000 / 512);
break;
default:
return RES_ERROR;
}
ensure_partition(pdrv);
return sdmmc_storage_write(storage, actual_sector, count, (void*)buff) ? RES_OK : RES_ERROR;
}
/*-----------------------------------------------------------------------*/