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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief SD Card LibI2C driver.
*/
/*
* Copyright (c) 2008 embedded brains GmbH & Co. KG
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#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
/**
* 1 idle token before command
* 6 bytes for the command
* 1 to 8 bytes for response start (N_CR)
* 1 to 2 bytes for response
* 1 idle token after command (minimum N_RC)
*/
#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 */
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