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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/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @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
#define MMC_CMDGOIDLE 0
#define MMC_CMDINIT 1
#define MMC_CMDINTERFACE_CONDITION 8
#define MMC_CMDREADCSD 9
#define MMC_CMDSTOP 12
#define MMC_CMDSETBLOCKLEN 16
#define MMC_CMDREAD 17
#define MMC_CMDREADMULTIPLE 18
#define MMC_CMDWRITE 24
#define MMC_CMDWRITEMULTIPLE 25
#define MMC_CMDAPP 55
#define MMC_CMDREADOCR 58
#define MMC_ACMDOPCONDITION 41
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name MMC_SPI configuration options
* @{
*/
/**
* @brief Block size for MMC transfers.
*/
#if !defined(MMC_SECTOR_SIZE) || defined(__DOXYGEN__)
#define MMC_SECTOR_SIZE 512
#endif
/**
* @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
/**
* @brief Number of positive insertion queries before generating the
* insertion event.
*/
#if !defined(MMC_POLLING_INTERVAL) || defined(__DOXYGEN__)
#define MMC_POLLING_INTERVAL 10
#endif
/**
* @brief Interval, in milliseconds, between insertion queries.
*/
#if !defined(MMC_POLLING_DELAY) || defined(__DOXYGEN__)
#define MMC_POLLING_DELAY 10
#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_WAIT = 2, /**< Waiting card. */
MMC_INSERTED = 3, /**< Card inserted. */
MMC_READY = 4, /**< Card ready. */
MMC_READING = 5, /**< Reading. */
MMC_WRITING = 6 /**< Writing. */
} mmcstate_t;
/**
* @brief Function used to query some hardware status bits.
*
* @return The status.
*/
typedef bool_t (*mmcquery_t)(void);
/**
* @brief Driver configuration structure.
* @note Not required in the current implementation.
*/
typedef struct {
uint8_t dummy;
} MMCConfig;
/**
* @brief Structure representing a MMC driver.
*/
typedef struct {
/**
* @brief Driver state.
*/
mmcstate_t state;
/**
* @brief Current configuration data.
*/
const MMCConfig *config;
/**
* @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;
/**
* @brief Write protect status query function.
*/
mmcquery_t is_protected;
/**
* @brief Insertion status query function.
*/
mmcquery_t is_inserted;
/**
* @brief Card insertion event source.
*/
EventSource inserted_event;
/**
* @brief Card removal event source.
*/
EventSource removed_event;
/**
* @brief MMC insertion polling timer.
*/
VirtualTimer vt;
/**
* @brief Insertion counter.
*/
uint_fast8_t cnt;
/***
* @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 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) ((mmcp)->is_protected())
/** @} */
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void mmcInit(void);
void mmcObjectInit(MMCDriver *mmcp, SPIDriver *spip,
const SPIConfig *lscfg, const SPIConfig *hscfg,
mmcquery_t is_protected, mmcquery_t is_inserted);
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);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_MMC_SPI */
#endif /* _MMC_SPI_H_ */
/** @} */
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