/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
                 2011,2012,2013 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS/RT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * @file    templates/sdc_lld.c
 * @brief   SDC Driver subsystem low level driver source template.
 *
 * @addtogroup SDC
 * @{
 */

#include "ch.h"
#include "hal.h"

#if HAL_USE_SDC || defined(__DOXYGEN__)

/*===========================================================================*/
/* Driver local definitions.                                                 */
/*===========================================================================*/

/*===========================================================================*/
/* Driver exported variables.                                                */
/*===========================================================================*/

/** @brief SDCD1 driver identifier.*/
#if PLATFORM_SDC_USE_SDC1 || defined(__DOXYGEN__)
SDCDriver SDCD1;
#endif

/*===========================================================================*/
/* Driver local variables.                                                   */
/*===========================================================================*/

/*===========================================================================*/
/* Driver local functions.                                                   */
/*===========================================================================*/

/*===========================================================================*/
/* Driver interrupt handlers.                                                */
/*===========================================================================*/

/*===========================================================================*/
/* Driver exported functions.                                                */
/*===========================================================================*/

/**
 * @brief   Low level SDC driver initialization.
 *
 * @notapi
 */
void sdc_lld_init(void) {

  sdcObjectInit(&SDCD1);
}

/**
 * @brief   Configures and activates the SDC peripheral.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 *
 * @notapi
 */
void sdc_lld_start(SDCDriver *sdcp) {

  if (sdcp->state == BLK_STOP) {

  }
}

/**
 * @brief   Deactivates the SDC peripheral.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 *
 * @notapi
 */
void sdc_lld_stop(SDCDriver *sdcp) {

  if (sdcp->state != BLK_STOP) {

  }
}

/**
 * @brief   Starts the SDIO clock and sets it to init mode (400kHz or less).
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 *
 * @notapi
 */
void sdc_lld_start_clk(SDCDriver *sdcp) {

  (void)sdcp;
}

/**
 * @brief   Sets the SDIO clock to data mode (25MHz or less).
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 *
 * @notapi
 */
void sdc_lld_set_data_clk(SDCDriver *sdcp) {

  (void)sdcp;
}

/**
 * @brief   Stops the SDIO clock.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 *
 * @notapi
 */
void sdc_lld_stop_clk(SDCDriver *sdcp) {

  (void)sdcp;
}

/**
 * @brief   Switches the bus to 4 bits mode.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 * @param[in] mode      bus mode
 *
 * @notapi
 */
void sdc_lld_set_bus_mode(SDCDriver *sdcp, sdcbusmode_t mode) {
  uint32_t clk = SDIO->CLKCR & ~SDIO_CLKCR_WIDBUS;

  (void)sdcp;

  switch (mode) {
  case SDC_MODE_1BIT:

    break;
  case SDC_MODE_4BIT:
 
    break;
  case SDC_MODE_8BIT:

    break;
  }
}

/**
 * @brief   Sends an SDIO command with no response expected.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 * @param[in] cmd       card command
 * @param[in] arg       command argument
 *
 * @notapi
 */
void sdc_lld_send_cmd_none(SDCDriver *sdcp, uint8_t cmd, uint32_t arg) {

  (void)sdcp;
}

/**
 * @brief   Sends an SDIO command with a short response expected.
 * @note    The CRC is not verified.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 * @param[in] cmd       card command
 * @param[in] arg       command argument
 * @param[out] resp     pointer to the response buffer (one word)
 *
 * @return              The operation status.
 * @retval CH_SUCCESS   operation succeeded.
 * @retval CH_FAILED    operation failed.
 *
 * @notapi
 */
bool_t sdc_lld_send_cmd_short(SDCDriver *sdcp, uint8_t cmd, uint32_t arg,
                              uint32_t *resp) {
 
 return CH_SUCCESS;
}

/**
 * @brief   Sends an SDIO command with a short response expected and CRC.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 * @param[in] cmd       card command
 * @param[in] arg       command argument
 * @param[out] resp     pointer to the response buffer (one word)
 *
 * @return              The operation status.
 * @retval CH_SUCCESS   operation succeeded.
 * @retval CH_FAILED    operation failed.
 *
 * @notapi
 */
bool_t sdc_lld_send_cmd_short_crc(SDCDriver *sdcp, uint8_t cmd, uint32_t arg,
                                  uint32_t *resp) {

  (void)sdcp;

  return CH_SUCCESS;
}

/**
 * @brief   Sends an SDIO command with a long response expected and CRC.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 * @param[in] cmd       card command
 * @param[in] arg       command argument
 * @param[out] resp     pointer to the response buffer (four words)
 *
 * @return              The operation status.
 * @retval CH_SUCCESS   operation succeeded.
 * @retval CH_FAILED    operation failed.
 *
 * @notapi
 */
bool_t sdc_lld_send_cmd_long_crc(SDCDriver *sdcp, uint8_t cmd, uint32_t arg,
                                 uint32_t *resp) {

  (void)sdcp;

  return CH_SUCCESS;
}

/**
 * @brief   Reads one or more blocks.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 * @param[in] startblk  first block to read
 * @param[out] buf      pointer to the read buffer
 * @param[in] n         number of blocks to read
 *
 * @return              The operation status.
 * @retval CH_SUCCESS   operation succeeded.
 * @retval CH_FAILED    operation failed.
 *
 * @notapi
 */
bool_t sdc_lld_read(SDCDriver *sdcp, uint32_t startblk,
                    uint8_t *buf, uint32_t n) {

  return CH_SUCCESS;
}

/**
 * @brief   Writes one or more blocks.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 * @param[in] startblk  first block to write
 * @param[out] buf      pointer to the write buffer
 * @param[in] n         number of blocks to write
 *
 * @return              The operation status.
 * @retval CH_SUCCESS  operation succeeded.
 * @retval CH_FAILED    operation failed.
 *
 * @notapi
 */
bool_t sdc_lld_write(SDCDriver *sdcp, uint32_t startblk,
                     const uint8_t *buf, uint32_t n) {

  return CH_SUCCESS;
}

/**
 * @brief   Waits for card idle condition.
 *
 * @param[in] sdcp      pointer to the @p SDCDriver object
 *
 * @return              The operation status.
 * @retval CH_SUCCESS   the operation succeeded.
 * @retval CH_FAILED    the operation failed.
 *
 * @api
 */
bool_t sdc_lld_sync(SDCDriver *sdcp) {

  (void)sdcp;
 
  return CH_SUCCESS;
}

#endif /* HAL_USE_SDC */

/** @} */