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fusee_cpp: implement sd card init

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Michael Scire 2021-08-23 07:11:28 -07:00 • committed by SciresM
parent 25cd3d17de
commit 49d0a51d6b
6 changed files with 167 additions and 3 deletions
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fusee_cpp/program/source/fusee_sd_card.cpp Normal file
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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* 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 <exosphere.hpp>
#include "fusee_sd_card.hpp"
namespace ams::nxboot {
namespace {
constexpr inline auto SdCardPort = sdmmc::Port_SdCard0;
constexpr inline const uintptr_t APB = secmon::MemoryRegionPhysicalDeviceApbMisc.GetAddress();
alignas(0x10) constinit u8 g_sd_work_buffer[sdmmc::SdCardWorkBufferSize];
void ConfigureInitialSdCardPinmux() {
/* Normally, these pints get configured by boot sysmodule during initial pinmux config. */
/* However, they're required to access the SD card, so we must do them ahead of time. */
reg::ReadWrite(APB + PINMUX_AUX_SDMMC1_CLK, PINMUX_REG_BITS_ENUM(AUX_E_INPUT, ENABLE),
PINMUX_REG_BITS_ENUM(AUX_TRISTATE, PASSTHROUGH),
PINMUX_REG_BITS_ENUM(AUX_PUPD, PULL_DOWN),
PINMUX_REG_BITS_ENUM(AUX_SDMMC1_CLK_PM, SDMMC1));
reg::ReadWrite(APB + PINMUX_AUX_SDMMC1_CMD, PINMUX_REG_BITS_ENUM(AUX_E_INPUT, ENABLE),
PINMUX_REG_BITS_ENUM(AUX_TRISTATE, PASSTHROUGH),
PINMUX_REG_BITS_ENUM(AUX_PUPD, PULL_UP),
PINMUX_REG_BITS_ENUM(AUX_SDMMC1_CMD_PM, SDMMC1));
reg::ReadWrite(APB + PINMUX_AUX_SDMMC1_DAT3, PINMUX_REG_BITS_ENUM(AUX_E_INPUT, ENABLE),
PINMUX_REG_BITS_ENUM(AUX_TRISTATE, PASSTHROUGH),
PINMUX_REG_BITS_ENUM(AUX_PUPD, PULL_UP),
PINMUX_REG_BITS_ENUM(AUX_SDMMC1_DAT3_PM, SDMMC1));
reg::ReadWrite(APB + PINMUX_AUX_SDMMC1_DAT2, PINMUX_REG_BITS_ENUM(AUX_E_INPUT, ENABLE),
PINMUX_REG_BITS_ENUM(AUX_TRISTATE, PASSTHROUGH),
PINMUX_REG_BITS_ENUM(AUX_PUPD, PULL_UP),
PINMUX_REG_BITS_ENUM(AUX_SDMMC1_DAT2_PM, SDMMC1));
reg::ReadWrite(APB + PINMUX_AUX_SDMMC1_DAT1, PINMUX_REG_BITS_ENUM(AUX_E_INPUT, ENABLE),
PINMUX_REG_BITS_ENUM(AUX_TRISTATE, PASSTHROUGH),
PINMUX_REG_BITS_ENUM(AUX_PUPD, PULL_UP),
PINMUX_REG_BITS_ENUM(AUX_SDMMC1_DAT1_PM, SDMMC1));
reg::ReadWrite(APB + PINMUX_AUX_SDMMC1_DAT0, PINMUX_REG_BITS_ENUM(AUX_E_INPUT, ENABLE),
PINMUX_REG_BITS_ENUM(AUX_TRISTATE, PASSTHROUGH),
PINMUX_REG_BITS_ENUM(AUX_PUPD, PULL_UP),
PINMUX_REG_BITS_ENUM(AUX_SDMMC1_DAT0_PM, SDMMC1));
reg::ReadWrite(APB + PINMUX_AUX_DMIC3_CLK, PINMUX_REG_BITS_ENUM(AUX_E_OD, DISABLE),
PINMUX_REG_BITS_ENUM(AUX_E_INPUT, DISABLE),
PINMUX_REG_BITS_ENUM(AUX_TRISTATE, PASSTHROUGH),
PINMUX_REG_BITS_ENUM(AUX_SDMMC1_DAT0_PM, RSVD2));
}
}
Result InitializeSdCard() {
/* Perform initial pinmux config to enable sd card access. */
ConfigureInitialSdCardPinmux();
/* Initialize the SD card. */
sdmmc::Initialize(SdCardPort);
/* Set the SD card work buffer. */
sdmmc::SetSdCardWorkBuffer(SdCardPort, g_sd_work_buffer, sizeof(g_sd_work_buffer));
/* Activate the SD card. */
return sdmmc::Activate(SdCardPort);
}
Result CheckSdCardConnection(sdmmc::SpeedMode *out_sm, sdmmc::BusWidth *out_bw) {
return sdmmc::CheckSdCardConnection(out_sm, out_bw, SdCardPort);
}
Result ReadSdCard(void *dst, size_t size, size_t sector_index, size_t sector_count) {
/* TODO */
return ResultSuccess();
}
Result WriteSdCard(size_t sector_index, size_t sector_count, const void *src, size_t size) {
/* TODO */
return ResultSuccess();
}
}