92c599f0f0
subrepo: subdir: "emummc" merged: "2fc47cbb8" upstream: origin: "https://github.com/lulle2007200/emuMMC.git" branch: "develop" commit: "2fc47cbb8" git-subrepo: version: "0.4.9" origin: "https://github.com/ingydotnet/git-subrepo.git" commit: "30db3b8"
108 lines
2.6 KiB
C
Vendored
108 lines
2.6 KiB
C
Vendored
/*
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* Copyright (c) 2018 naehrwert
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include "../utils/types.h"
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#include "nx_emmc.h"
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static u32 emmc_mode = EMMC_MMC_HS400;
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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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{
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// The last LBA is inclusive.
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if (part->lba_start + sector_off > part->lba_end)
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return 0;
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return sdmmc_storage_read(storage, part->lba_start + sector_off, num_sectors, buf);
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}
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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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{
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// The last LBA is inclusive.
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if (part->lba_start + sector_off > part->lba_end)
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return 0;
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return sdmmc_storage_write(storage, part->lba_start + sector_off, num_sectors, buf);
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}
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int emmc_init_retry(bool power_cycle)
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{
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u32 bus_width = SDMMC_BUS_WIDTH_8;
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u32 type = SDHCI_TIMING_MMC_HS400;
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// Power cycle SD eMMC.
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if (power_cycle)
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{
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emmc_mode--;
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nx_emmc_end();
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}
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// Get init parameters.
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switch (emmc_mode)
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{
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case EMMC_INIT_FAIL: // Reset to max.
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return 0;
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case EMMC_1BIT_HS52:
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bus_width = SDMMC_BUS_WIDTH_1;
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type = SDHCI_TIMING_MMC_HS52;
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break;
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case EMMC_8BIT_HS52:
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type = SDHCI_TIMING_MMC_HS52;
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break;
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case EMMC_MMC_HS200:
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type = SDHCI_TIMING_MMC_HS200;
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break;
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case EMMC_MMC_HS400:
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type = SDHCI_TIMING_MMC_HS400;
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break;
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default:
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emmc_mode = EMMC_MMC_HS400;
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}
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return sdmmc_storage_init_mmc(&emmc_storage, &emmc_sdmmc, bus_width, type);
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}
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void nx_emmc_end() { sdmmc_storage_end(&emmc_storage); }
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bool nx_emmc_initialize(bool power_cycle)
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{
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// Reset mode in case of previous failure.
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if (emmc_mode == EMMC_INIT_FAIL)
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emmc_mode = EMMC_MMC_HS400;
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if (power_cycle)
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nx_emmc_end();
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int res = !emmc_init_retry(false);
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while (true)
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{
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if (!res)
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return true;
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else
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{
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if (emmc_mode == EMMC_INIT_FAIL)
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break;
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else
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res = !emmc_init_retry(true);
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}
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}
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nx_emmc_end();
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return false;
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}
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int nx_emmc_set_partition(u32 partition) { return sdmmc_storage_set_mmc_partition(&emmc_storage, partition); }
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