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SD Card driver

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This commit is contained in:
Thomas Doerfler
2008-07-10 06:16:49 +00:00
parent 03bed2dbc0
commit e0ecc66d90
2 changed files with 1233 additions and 0 deletions
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1149
c/src/libchip/i2c/spi-sd-card.c Normal file
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c/src/libchip/i2c/spi-sd-card.h Normal file
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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 \
}
#define SD_CARD_N_AC_MAX_DEFAULT 8
typedef struct {
rtems_libi2c_drv_t driver;
int table_index;
rtems_device_minor_number minor;
const char *device_name;
const char *disk_device_name;
rtems_libi2c_tfr_mode_t transfer_mode;
uint8_t command [SD_CARD_COMMAND_SIZE];
uint8_t response [SD_CARD_COMMAND_SIZE];
int response_index;
int n_ac_max;
uint32_t block_number;
uint32_t block_size;
uint32_t block_size_shift;
bool busy;
bool verbose;
bool schedule_if_busy;
} sd_card_driver_entry;
extern const rtems_driver_address_table sd_card_driver_ops;
extern sd_card_driver_entry sd_card_driver_table [];
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LIBI2C_SD_CARD_H */