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/**
* @file
*
* @brief SD Card LibI2C driver.
*/
/*
* 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.com/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
/**
* 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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