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git subrepo clone --force --branch=exo2 https://github.com/m4xw/emummc

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subrepo:
  subdir:   "emummc"
  merged:   "3791be9f"
upstream:
  origin:   "https://github.com/m4xw/emummc"
  branch:   "exo2"
  commit:   "3791be9f"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"
This commit is contained in:
Michael Scire 2020-06-08 16:26:55 -07:00 • committed by SciresM
parent 6c145d76c7
commit f82954e98b
29 changed files with 1653 additions and 871 deletions
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91
emummc/source/emmc/nx_sd.c Normal file
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/*
* Copyright (c) 2019 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 "nx_sd.h"
#include "sdmmc.h"
#include "sdmmc_driver.h"
#include "../soc/gpio.h"
#include "../libs/fatfs/ff.h"
extern sdmmc_t sd_sdmmc;
extern sdmmc_storage_t sd_storage;
static u32 sd_mode = SD_UHS_SDR104;
u32 nx_sd_mode_get()
{
return sd_mode;
}
int nx_sd_init_retry(bool power_cycle)
{
u32 bus_width = SDMMC_BUS_WIDTH_4;
u32 type = SDHCI_TIMING_UHS_SDR104;
// Power cycle SD card.
if (power_cycle)
{
sd_mode--;
sdmmc_storage_end(&sd_storage);
}
// Get init parameters.
switch (sd_mode)
{
case SD_INIT_FAIL: // Reset to max.
return 0;
case SD_1BIT_HS25:
bus_width = SDMMC_BUS_WIDTH_1;
type = SDHCI_TIMING_SD_HS25;
break;
case SD_4BIT_HS25:
type = SDHCI_TIMING_SD_HS25;
break;
case SD_UHS_SDR82:
type = SDHCI_TIMING_UHS_SDR82;
break;
case SD_UHS_SDR104:
type = SDHCI_TIMING_UHS_SDR104;
break;
default:
sd_mode = SD_UHS_SDR104;
}
return sdmmc_storage_init_sd(&sd_storage, &sd_sdmmc, bus_width, type);
}
bool nx_sd_initialize(bool power_cycle)
{
if (power_cycle)
sdmmc_storage_end(&sd_storage);
int res = !nx_sd_init_retry(false);
while (true)
{
if (!res)
return true;
else
{
if (sd_mode == SD_INIT_FAIL)
break;
res = !nx_sd_init_retry(true);
}
}
return false;
}