system/dev/block/sdmmc/sdmmc.h

// Copyright 2017 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#pragma once

#include <zircon/compiler.h>

#include <ddk/device.h>
#include <ddk/protocol/block.h>
#include <hw/sdmmc.h>

__BEGIN_CDECLS;

typedef struct sdmmc {
    zx_device_t* mxdev;
    zx_device_t* host_mxdev;

    uint8_t type;
#define SDMMC_TYPE_SD   0
#define SDMMC_TYPE_MMC  1

    uint8_t bus_width;      // Data bus width
    uint8_t signal_voltage; // Bus signal voltage

    uint8_t timing;         // Bus timing
#define SDMMC_TIMING_LEGACY 0
#define SDMMC_TIMING_HS     1
#define SDMMC_TIMING_HS200  2
#define SDMMC_TIMING_HS400  3

    unsigned clock_rate;    // Bus clock rate
    uint64_t capacity;      // Card capacity

    uint16_t rca;           // Relative address

    uint32_t raw_cid[4];
    uint32_t raw_csd[4];
    uint8_t raw_ext_csd[512];

    block_callbacks_t* callbacks;
} sdmmc_t;

// Issue a command to the host controller
zx_status_t sdmmc_do_command(zx_device_t* dev, const uint32_t cmd, const uint32_t arg, iotxn_t* txn);

zx_status_t sdmmc_probe_sd(sdmmc_t* sdmmc, iotxn_t* setup_txn);
zx_status_t sdmmc_probe_mmc(sdmmc_t* sdmmc, iotxn_t* setup_txn);

__END_CDECLS;