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hekate/bootloader/storage/nx_emmc.c

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/*
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* Copyright (c) 2018 naehrwert
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
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#include <string.h>
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#include "mbr_gpt.h"
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#include "nx_emmc.h"
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#include "emummc.h"
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#include "../mem/heap.h"
#include "../utils/list.h"
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sdmmc_t emmc_sdmmc;
sdmmc_storage_t emmc_storage;
FATFS emmc_fs;
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void nx_emmc_gpt_parse(link_t *gpt, sdmmc_storage_t *storage)
{
gpt_t *gpt_buf = (gpt_t *)calloc(NX_GPT_NUM_BLOCKS, NX_EMMC_BLOCKSIZE);
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emummc_storage_read(storage, NX_GPT_FIRST_LBA, NX_GPT_NUM_BLOCKS, gpt_buf);
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for (u32 i = 0; i < gpt_buf->header.num_part_ents; i++)
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{
emmc_part_t *part = (emmc_part_t *)calloc(sizeof(emmc_part_t), 1);
if (gpt_buf->entries[i].lba_start < gpt_buf->header.first_use_lba)
continue;
part->index = i;
part->lba_start = gpt_buf->entries[i].lba_start;
part->lba_end = gpt_buf->entries[i].lba_end;
part->attrs = gpt_buf->entries[i].attrs;
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// ASCII conversion. Copy only the LSByte of the UTF-16LE name.
for (u32 j = 0; j < 36; j++)
part->name[j] = gpt_buf->entries[i].name[j];
part->name[35] = 0;
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list_append(gpt, &part->link);
}
free(gpt_buf);
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}
void nx_emmc_gpt_free(link_t *gpt)
{
LIST_FOREACH_SAFE(iter, gpt)
free(CONTAINER_OF(iter, emmc_part_t, link));
}
emmc_part_t *nx_emmc_part_find(link_t *gpt, const char *name)
{
LIST_FOREACH_ENTRY(emmc_part_t, part, gpt, link)
if (!strcmp(part->name, name))
return part;
return NULL;
}
int nx_emmc_part_read(sdmmc_storage_t *storage, emmc_part_t *part, u32 sector_off, u32 num_sectors, void *buf)
{
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// The last LBA is inclusive.
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if (part->lba_start + sector_off > part->lba_end)
return 0;
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return emummc_storage_read(storage, part->lba_start + sector_off, num_sectors, buf);
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}
int nx_emmc_part_write(sdmmc_storage_t *storage, emmc_part_t *part, u32 sector_off, u32 num_sectors, void *buf)
{
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// The last LBA is inclusive.
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if (part->lba_start + sector_off > part->lba_end)
return 0;
return sdmmc_storage_write(storage, part->lba_start + sector_off, num_sectors, buf);
}