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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support - ROUSSET -
* ----------------------------------------------------------------------------
* Copyright (c) 2006, Atmel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the disclaimer below in the documentation and/or
* other materials provided with the distribution.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
#ifndef MCI_H
#define MCI_H
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include <board.h>
//------------------------------------------------------------------------------
// Constants
//------------------------------------------------------------------------------
/// Transfer is pending.
#define MCI_STATUS_PENDING 1
/// Transfer has been aborted because an error occured.
#define MCI_STATUS_ERROR 2
/// Card did not answer command.
#define MCI_STATUS_NORESPONSE 3
/// MCI driver is currently in use.
#define MCI_ERROR_LOCK 1
/// MCI configuration with 1-bit data bus on slot A (for MMC cards).
#define MCI_MMC_SLOTA 0
/// MCI configuration with 1-bit data bus on slot B (for MMC cards).
#define MCI_MMC_SLOTB 1
/// MCI configuration with 4-bit data bus on slot A (for SD cards).
#define MCI_SD_SLOTA AT91C_MCI_SCDBUS
/// MCI configuration with 4-bit data bus on slot B (for SD cards).
#define MCI_SD_SLOTB (AT91C_MCI_SCDBUS | 1)
/// Start new data transfer
#define MCI_NEW_TRANSFER 0
/// Continue data transfer
#define MCI_CONTINUE_TRANSFER 1
/// MCI SD Bus Width 1-bit
#define MCI_SDCBUS_1BIT (0 << 7)
/// MCI SD Bus Width 4-bit
#define MCI_SDCBUS_4BIT (1 << 7)
//------------------------------------------------------------------------------
// Types
//------------------------------------------------------------------------------
/// MCI end-of-transfer callback function.
typedef void (*MciCallback)(unsigned char status, void *pCommand);
//------------------------------------------------------------------------------
/// MCI Transfer Request prepared by the application upper layer. This structure
/// is sent to the MCI_SendCommand function to start the transfer. At the end of
/// the transfer, the callback is invoked by the interrupt handler.
//------------------------------------------------------------------------------
typedef struct _MciCmd {
/// Command status.
volatile char status;
/// Command code.
unsigned int cmd;
/// Command argument.
unsigned int arg;
/// Data buffer.
unsigned char *pData;
/// Size of data buffer in bytes.
unsigned short blockSize;
/// Number of blocks to be transfered
unsigned short nbBlock;
/// Indicate if continue to transfer data
unsigned char conTrans;
/// Indicates if the command is a read operation.
unsigned char isRead;
/// Response buffer.
unsigned int *pResp;
/// Size of SD card response in bytes.
unsigned char resSize;
/// Optional user-provided callback function.
MciCallback callback;
/// Optional argument to the callback function.
void *pArg;
} MciCmd;
//------------------------------------------------------------------------------
/// MCI driver structure. Holds the internal state of the MCI driver and
/// prevents parallel access to a MCI peripheral.
//------------------------------------------------------------------------------
typedef struct {
/// Pointer to a MCI peripheral.
AT91S_MCI *pMciHw;
/// MCI peripheral identifier.
unsigned char mciId;
/// Pointer to currently executing command.
MciCmd *pCommand;
/// Mutex.
volatile char semaphore;
} Mci;
//------------------------------------------------------------------------------
// Global functions
//------------------------------------------------------------------------------
extern void MCI_Init(
Mci *pMci,
AT91PS_MCI pMciHw,
unsigned char mciId,
unsigned int mode);
extern void MCI_SetSpeed(Mci *pMci, unsigned int mciSpeed);
extern unsigned char MCI_SendCommand(Mci *pMci, MciCmd *pMciCmd);
extern void MCI_Handler(Mci *pMci);
extern unsigned char MCI_IsTxComplete(MciCmd *pMciCmd);
extern unsigned char MCI_CheckBusy(Mci *pMci);
extern void MCI_Close(Mci *pMci);
extern void MCI_SetBusWidth(Mci *pMci, unsigned char busWidth);
#endif //#ifndef MCI_H
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