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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 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 mmc_spi.h
* @brief MMC over SPI driver header.
*
* @addtogroup MMC_SPI
* @{
*/
#ifndef _MMC_SPI_H_
#define _MMC_SPI_H_
#if HAL_USE_MMC_SPI || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
#define MMC_CMD0_RETRY 10
#define MMC_CMD1_RETRY 100
#define MMC_ACMD41_RETRY 100
#define MMC_WAIT_DATA 10000
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name MMC_SPI configuration options
* @{
*/
/**
* @brief Delays insertions.
* @details If enabled this options inserts delays into the MMC waiting
* routines releasing some extra CPU time for the threads with
* lower priority, this may slow down the driver a bit however.
* This option is recommended also if the SPI driver does not
* use a DMA channel and heavily loads the CPU.
*/
#if !defined(MMC_NICE_WAITING) || defined(__DOXYGEN__)
#define MMC_NICE_WAITING TRUE
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if !HAL_USE_SPI || !CH_USE_EVENTS
#error "MMC_SPI driver requires HAL_USE_SPI and CH_USE_EVENTS"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Driver state machine possible states.
*/
typedef enum {
MMC_UNINIT = 0, /**< Not initialized. */
MMC_STOP = 1, /**< Stopped. */
MMC_READY = 2, /**< Ready. */
MMC_CONNECTING = 3, /**< Card connection in progress. */
MMC_DISCONNECTING = 4, /**< Card disconnection in progress. */
MMC_ACTIVE = 5, /**< Cart initialized. */
MMC_READING = 6, /**< Read operation in progress. */
MMC_WRITING = 7, /**< Write operation in progress. */
} mmcstate_t;
/**
* @brief MMC/SD over SPI driver configuration structure.
*/
typedef struct {
/**
* @brief SPI driver associated to this MMC driver.
*/
SPIDriver *spip;
/**
* @brief SPI low speed configuration used during initialization.
*/
const SPIConfig *lscfg;
/**
* @brief SPI high speed configuration used during transfers.
*/
const SPIConfig *hscfg;
} MMCConfig;
/**
* @brief @p MMCDriver specific methods.
*/
#define _mmc_driver_methods \
_mmcsd_block_device_methods
/**
* @extends MMCSDBlockDeviceVMT
*
* @brief @p MMCDriver virtual methods table.
*/
struct MMCDriverVMT {
_mmc_driver_methods
};
/**
* @extends MMCSDBlockDevice
*
* @brief Structure representing a MMC/SD over SPI driver.
*/
typedef struct {
/**
* @brief Virtual Methods Table.
*/
const struct MMCDriverVMT *vmt;
_mmcsd_block_device_data
/**
* @brief Driver state.
*/
mmcstate_t state;
/**
* @brief Current configuration data.
*/
const MMCConfig *config;
/***
* @brief Addresses use blocks instead of bytes.
*/
bool_t block_addresses;
} MMCDriver;
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @name Macro Functions
* @{
*/
/**
* @brief Returns the driver state.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @return The driver state.
*
* @api
*/
#define mmcGetDriverState(mmcp) ((mmcp)->state)
/**
* @brief Returns the card insertion status.
* @note This macro wraps a low level function named
* @p sdc_lld_is_card_inserted(), this function must be
* provided by the application because it is not part of the
* SDC driver.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @return The card state.
* @retval FALSE card not inserted.
* @retval TRUE card inserted.
*
* @api
*/
#define mmcIsCardInserted(mmcp) mmc_lld_is_card_inserted(mmcp)
/**
* @brief Returns the write protect status.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @return The card state.
* @retval FALSE card not inserted.
* @retval TRUE card inserted.
*
* @api
*/
#define mmcIsWriteProtected(mmcp) mmc_lld_is_write_protected(mmcp)
/** @} */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void mmcInit(void);
void mmcObjectInit(MMCDriver *mmcp);
void mmcStart(MMCDriver *mmcp, const MMCConfig *config);
void mmcStop(MMCDriver *mmcp);
bool_t mmcConnect(MMCDriver *mmcp);
bool_t mmcDisconnect(MMCDriver *mmcp);
bool_t mmcStartSequentialRead(MMCDriver *mmcp, uint32_t startblk);
bool_t mmcSequentialRead(MMCDriver *mmcp, uint8_t *buffer);
bool_t mmcStopSequentialRead(MMCDriver *mmcp);
bool_t mmcStartSequentialWrite(MMCDriver *mmcp, uint32_t startblk);
bool_t mmcSequentialWrite(MMCDriver *mmcp, const uint8_t *buffer);
bool_t mmcStopSequentialWrite(MMCDriver *mmcp);
bool_t mmcSync(MMCDriver *mmcp);
bool_t mmcGetInfo(MMCDriver *mmcp, BlockDeviceInfo *bdip);
bool_t mmcErase(MMCDriver *mmcp, uint32_t startblk, uint32_t endblk);
bool_t mmc_lld_is_card_inserted(MMCDriver *mmcp);
bool_t mmc_lld_is_write_protected(MMCDriver *mmcp);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_MMC_SPI */
#endif /* _MMC_SPI_H_ */
/** @} */
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