source: rtems/c/src/lib/libbsp/powerpc/mpc55xxevb/startup/sd-card-init.c @ 68799a2a

/**
 * @file
 *
 * @ingroup mpc55xx
 *
 * @brief SD Card initialization code.
 */

/*
 * 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.
 */

#include <stdio.h>

#include <mpc55xx/mpc55xx.h>
#include <mpc55xx/regs.h>
#include <mpc55xx/dspi.h>

#include <bsp.h>

#include <rtems/status-checks.h>

static rtems_status_code mpc55xx_dspi_init(void)
{
        int rv = 0;
        int i = 0;
        char device_name [] = "/dev/spi0";
        union SIU_PCR_tag pcr = MPC55XX_ZERO_FLAGS;

        rv = rtems_libi2c_initialize();
        RTEMS_CHECK_RV_SC( rv, "rtems_libi2c_initialize");

        /* DSPI D inputs are taken from DSPI C */
        SIU.DISR.R = 0x000000FC;

        /* DSPI A signals */
        pcr.B.PA = 1;
        pcr.B.ODE = 0;
        pcr.B.HYS = 0;
        pcr.B.SRC = 3;
        pcr.B.WPE = 1;
        pcr.B.WPS = 1;

        /* SCK */
        pcr.B.OBE = 1;
        pcr.B.IBE = 0;
        SIU.PCR [93].R = pcr.R;

        /* SIN */
        pcr.B.OBE = 0;
        pcr.B.IBE = 1;
        SIU.PCR [94].R = pcr.R;

        /* SOUT */
        pcr.B.OBE = 1;
        pcr.B.IBE = 0;
        SIU.PCR [95].R = pcr.R;

        /* PCSx */
        pcr.B.OBE = 1;
        pcr.B.IBE = 0;
        SIU.PCR [96].R = pcr.R;
        SIU.PCR [97].R = pcr.R;
        SIU.PCR [98].R = pcr.R;
        SIU.PCR [99].R = pcr.R;
        SIU.PCR [100].R = pcr.R;
        SIU.PCR [101].R = pcr.R;

        mpc55xx_dspi_bus_table [3].master = 0;
        for (i = 0; i < MPC55XX_DSPI_NUMBER; ++i) {
                device_name [8] = (char) ('0' + i);
                rv = rtems_libi2c_register_bus( device_name, (rtems_libi2c_bus_t *) &mpc55xx_dspi_bus_table [i]);
                RTEMS_CHECK_RV_SC( rv, device_name);
        }

        return RTEMS_SUCCESSFUL;
}

#include <stdio.h>
#include <rtems/fsmount.h>
#include <rtems/dosfs.h>
#include <rtems/bdpart.h>
#include <rtems/console.h>

#include <libchip/spi-sd-card.h>

#define MPC55XX_DEVICE "sd-card-a"
#define MPC55XX_DEVICE_FILE "/dev/" MPC55XX_DEVICE
#define MPC55XX_PARTITION "/dev/sd-card-a1"
#define MPC55XX_MOUNT_POINT "/mnt"

static fstab_t mpc55xx_fs_table [] = { {
                MPC55XX_PARTITION, MPC55XX_MOUNT_POINT,
                &msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
                FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR | FSMOUNT_MNT_FAILED,
                FSMOUNT_MNT_OK
        }, {
                MPC55XX_DEVICE_FILE, MPC55XX_MOUNT_POINT,
                &msdos_ops, RTEMS_FILESYSTEM_READ_WRITE,
                FSMOUNT_MNT_OK | FSMOUNT_MNTPNT_CRTERR | FSMOUNT_MNT_FAILED,
                0
        }
};

sd_card_driver_entry sd_card_driver_table [] = {
        {
                .device_name = "/dev/sd-card-a",
                .bus = 0,
                .transfer_mode = SD_CARD_TRANSFER_MODE_DEFAULT,
                .command = SD_CARD_COMMAND_DEFAULT,
                /* response : whatever, */
                .response_index = SD_CARD_COMMAND_SIZE,
                .n_ac_max = SD_CARD_N_AC_MAX_DEFAULT,
                .block_number = 0,
                .block_size = 0,
                .block_size_shift = 0,
                .busy = true,
                .verbose = true,
                .schedule_if_busy = false
        }
};

size_t sd_card_driver_table_size = sizeof( sd_card_driver_table) / sizeof( sd_card_driver_table [0]);

rtems_status_code mpc55xx_sd_card_init( bool mount)
{
        rtems_status_code sc = RTEMS_SUCCESSFUL;
        int rv = 0;
        sd_card_driver_entry *e = &sd_card_driver_table [0];

        RTEMS_DEBUG_PRINT( "Task started\n");

        sc = mpc55xx_dspi_init();
        RTEMS_CHECK_SC( rv, "Intitalize DSPI bus");

        e->bus = mpc55xx_dspi_bus_table [0].bus_number;

        sc = sd_card_register();
        RTEMS_CHECK_SC( sc, "Register SD Card");

        if (mount) {
                sc = rtems_bdpart_register_from_disk( MPC55XX_DEVICE_FILE);
                RTEMS_CHECK_SC( sc, "Initialize IDE partition table");

                rv = rtems_fsmount( mpc55xx_fs_table, sizeof( mpc55xx_fs_table) / sizeof( mpc55xx_fs_table [0]), NULL);
                RTEMS_CHECK_RV_SC( rv, "Mount file systems");
        }

        return RTEMS_SUCCESSFUL;
}