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76 lines
1.5 KiB
C
76 lines
1.5 KiB
C
#ifndef __FUSEE_SDMMC_H__
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#define __FUSEE_SDMMC_H__
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#include <stdbool.h>
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#include <stdint.h>
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#include "utils.h"
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/* Opaque pointer to the Tegra SDMMC registers */
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struct tegra_sdmmc;
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/**
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* Represents the different types of devices an MMC object
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* can represent.
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*/
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enum mmc_card_type {
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MMC_CARD_EMMC,
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MMC_CARD_MMC,
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MMC_CARD_SD,
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MMC_CARD_CART,
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};
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/**
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* Primary data structure describing a Fusée MMC driver.
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*/
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struct mmc {
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/* Controller properties */
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char *name;
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unsigned int timeout;
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enum mmc_card_type card_type;
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bool use_dma;
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/* Card properties */
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uint8_t cid[15];
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uint32_t relative_address;
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uint8_t read_block_order;
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bool uses_block_addressing;
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/* Pointers to hardware structures */
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volatile struct tegra_sdmmc *regs;
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};
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/**
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* SDMMC controllers
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*/
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enum sdmmc_controller {
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SWITCH_MICROSD = 0,
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SWITCH_EMMC = 3
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};
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/**
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* Initiailzes an SDMMC controller for use with an eMMC or SD card device.
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*
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* @param mmc An (uninitialized) structure for the MMC device.
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* @param controller The controller number to be initialized. Either SWITCH_MICROSD or SWITCH_EMMC.
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*/
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int sdmmc_init(struct mmc *mmc, enum sdmmc_controller controller);
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/**
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* Reads a sector or sectors from a given SD card.
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*
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* @param mmc The MMC device to work with.
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* @param buffer The output buffer to target.
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* @param sector The sector number to read.
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* @param count The number of sectors to read.
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*/
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int sdmmc_read(struct mmc *mmc, void *buffer, uint32_t sector, unsigned int count);
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#endif
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