spi-sd-card.h

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/*
 * Copyright (c) 2008
 * Embedded Brains GmbH
 * Obere Lagerstr. 30
 * D-82178 Puchheim
 * Germany
 * rtems@embedded-brains.de
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */

#ifndef LIBI2C_SD_CARD_H
#define LIBI2C_SD_CARD_H

#include <stdint.h>
#include <stdbool.h>

#include <rtems/libi2c.h>

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#define SD_CARD_IDLE_TOKEN 0xff

#define SD_CARD_COMMAND_SIZE 18

#define SD_CARD_TRANSFER_MODE_DEFAULT { .baudrate = 400000, .bits_per_char = 8, .lsb_first = FALSE, .clock_inv = FALSE, .clock_phs = FALSE, .idle_char = SD_CARD_IDLE_TOKEN }

#define SD_CARD_COMMAND_DEFAULT { \
    SD_CARD_IDLE_TOKEN, \
    0x40, 0, 0, 0, 0, 0x95, \
    SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \
    SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \
    SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \
    SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \
    SD_CARD_IDLE_TOKEN, SD_CARD_IDLE_TOKEN, \
    SD_CARD_IDLE_TOKEN \
}

/* Default speed = 400kbps, default timeout = 100ms, n_ac_max is in bytes */
#define SD_CARD_N_AC_MAX_DEFAULT 5000

typedef struct {
    const char *device_name;
    rtems_device_minor_number bus;
    rtems_libi2c_tfr_mode_t transfer_mode;
    uint8_t command [SD_CARD_COMMAND_SIZE];
    uint8_t response [SD_CARD_COMMAND_SIZE];
    int response_index;
    uint32_t n_ac_max;
    uint32_t block_number;
    uint32_t block_size;
    uint32_t block_size_shift;
    bool busy;
    bool verbose;
    bool schedule_if_busy;
    uint32_t retries;
} sd_card_driver_entry;

extern sd_card_driver_entry sd_card_driver_table [];

extern size_t sd_card_driver_table_size;

rtems_status_code sd_card_register( void);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* LIBI2C_SD_CARD_H */