hekate/bdk/storage/emmc.c

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/*
* Copyright (c) 2018 naehrwert
* Copyright (c) 2019-2022 CTCaer
*
* 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/>.
*/
#include <string.h>
#include "emmc.h"
#include <mem/heap.h>
#include <soc/fuse.h>
#include <storage/mbr_gpt.h>
#include <utils/list.h>
static u16 emmc_errors[3] = { 0 }; // Init and Read/Write errors.
static u32 emmc_mode = EMMC_MMC_HS400;
sdmmc_t emmc_sdmmc;
sdmmc_storage_t emmc_storage;
FATFS emmc_fs;
#ifdef BDK_EMUMMC_ENABLE
int emummc_storage_read(u32 sector, u32 num_sectors, void *buf);
int emummc_storage_write(u32 sector, u32 num_sectors, void *buf);
#endif
void emmc_error_count_increment(u8 type)
{
switch (type)
{
case EMMC_ERROR_INIT_FAIL:
emmc_errors[0]++;
break;
case EMMC_ERROR_RW_FAIL:
emmc_errors[1]++;
break;
case EMMC_ERROR_RW_RETRY:
emmc_errors[2]++;
break;
}
}
u16 *emmc_get_error_count()
{
return emmc_errors;
}
u32 emmc_get_mode()
{
return emmc_mode;
}
int emmc_init_retry(bool power_cycle)
{
u32 bus_width = SDMMC_BUS_WIDTH_8;
u32 type = SDHCI_TIMING_MMC_HS400;
// Power cycle SD eMMC.
if (power_cycle)
{
emmc_mode--;
sdmmc_storage_end(&emmc_storage);
}
// Get init parameters.
switch (emmc_mode)
{
case EMMC_INIT_FAIL: // Reset to max.
return 0;
case EMMC_1BIT_HS52:
bus_width = SDMMC_BUS_WIDTH_1;
type = SDHCI_TIMING_MMC_HS52;
break;
case EMMC_8BIT_HS52:
type = SDHCI_TIMING_MMC_HS52;
break;
case EMMC_MMC_HS200:
type = SDHCI_TIMING_MMC_HS200;
break;
case EMMC_MMC_HS400:
type = SDHCI_TIMING_MMC_HS400;
break;
default:
emmc_mode = EMMC_MMC_HS400;
}
return sdmmc_storage_init_mmc(&emmc_storage, &emmc_sdmmc, bus_width, type);
}
bool emmc_initialize(bool power_cycle)
{
// Reset mode in case of previous failure.
if (emmc_mode == EMMC_INIT_FAIL)
emmc_mode = EMMC_MMC_HS400;
if (power_cycle)
sdmmc_storage_end(&emmc_storage);
int res = !emmc_init_retry(false);
while (true)
{
if (!res)
return true;
else
{
emmc_errors[EMMC_ERROR_INIT_FAIL]++;
if (emmc_mode == EMMC_INIT_FAIL)
break;
else
res = !emmc_init_retry(true);
}
}
sdmmc_storage_end(&emmc_storage);
return false;
}
void emmc_gpt_parse(link_t *gpt)
{
gpt_t *gpt_buf = (gpt_t *)calloc(GPT_NUM_BLOCKS, EMMC_BLOCKSIZE);
#ifdef BDK_EMUMMC_ENABLE
emummc_storage_read(GPT_FIRST_LBA, GPT_NUM_BLOCKS, gpt_buf);
#else
sdmmc_storage_read(&emmc_storage, GPT_FIRST_LBA, GPT_NUM_BLOCKS, gpt_buf);
#endif
// Check if no GPT or more than max allowed entries.
if (memcmp(&gpt_buf->header.signature, "EFI PART", 8) || gpt_buf->header.num_part_ents > 128)
goto out;
for (u32 i = 0; i < gpt_buf->header.num_part_ents; i++)
{
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;
// 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;
list_append(gpt, &part->link);
}
out:
free(gpt_buf);
}
void emmc_gpt_free(link_t *gpt)
{
LIST_FOREACH_SAFE(iter, gpt)
free(CONTAINER_OF(iter, emmc_part_t, link));
}
emmc_part_t *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 emmc_part_read(emmc_part_t *part, u32 sector_off, u32 num_sectors, void *buf)
{
// The last LBA is inclusive.
if (part->lba_start + sector_off > part->lba_end)
return 0;
#ifdef BDK_EMUMMC_ENABLE
return emummc_storage_read(part->lba_start + sector_off, num_sectors, buf);
#else
return sdmmc_storage_read(&emmc_storage, part->lba_start + sector_off, num_sectors, buf);
#endif
}
int emmc_part_write(emmc_part_t *part, u32 sector_off, u32 num_sectors, void *buf)
{
// The last LBA is inclusive.
if (part->lba_start + sector_off > part->lba_end)
return 0;
#ifdef BDK_EMUMMC_ENABLE
return emummc_storage_write(part->lba_start + sector_off, num_sectors, buf);
#else
return sdmmc_storage_write(&emmc_storage, part->lba_start + sector_off, num_sectors, buf);
#endif
}
void nx_emmc_get_autorcm_masks(u8 *mod0, u8 *mod1)
{
if (fuse_read_hw_state() == FUSE_NX_HW_STATE_PROD)
{
*mod0 = 0xF7;
*mod1 = 0x86;
}
else
{
*mod0 = 0x37;
*mod1 = 0x84;
}
}