sdcarddriver.c

凌阳SPCE3200 系统开发板随机自带源程序。共安排了32个子目录

//====================================================================================
//文 件 名：SDCardDriver.c
//功能描述: SD卡驱动
//维护记录: 2007年1月17日
//====================================================================================
#include "SPCE3200_Register.h"
#include "SDCardDriver.h"
#include "SPCE3200_Constant.h"

unsigned int rca;
int g_sd_dmabusy;
int cardtype;
int SDCardTotalSector;
int gSDCardInsert;
int gSDCardPresent;
int gSDCardWriteProtect;
extern void invalid_cache(unsigned int *addr);

//=============================================================
//语法格式：	int WaitSDStatus(unsigned int pollbit)
//实现功能：	等待SD卡控制器的某个状态发生
//参数：		pollbit	-	状态对应的位
//返回值：		正常退出返回0,超时或控制器错误返回1
//=============================================================
int WaitSDStatus(unsigned int pollbit)
{
	int i;
	i = 0;
	do {
		i = i + 1;
		if(!gSDCardInsert)
		return 1;
	} while (((*P_SD_INT_STATUS & pollbit) == 0) && (i<600000));
	if (i==600000)
		return 1;
	if ((*P_SD_INT_STATUS & (MASK_S_RespIdxError|MASK_S_RespCRCError|MASK_S_DataCRCError|MASK_S_TimeOut)) != 0)
		return 1;
	return 0;
}

//=============================================================
//语法格式：	int SDCommand(unsigned int commandset, unsigned int arg, unsigned int* outaddr)
//实现功能：	向SD卡发送命令, 并接收32bit响应数据
//参数：		commandset	-	命令
//				arg			-	命令参数
//				outaddr		-	响应数据保存地址
//返回值：		正常退出返回0,超时或控制器错误返回1
//=============================================================
int SDCommand(unsigned int commandset, unsigned int arg, unsigned int* outaddr)
{
	// Write Argument First
	*P_SD_ARGUMENT_DATA = arg;
	*P_SD_COMMAND_SETUP = commandset;
	if (WaitSDStatus(MASK_S_CmdComplete))
	{
		*P_SD_INT_STATUS = MASK_S_ClrAllBits;
		return 1;
	}
	*outaddr = *P_SD_RESPONSE_DATA;
	*P_SD_INT_STATUS = MASK_S_ClrAllBits;
	return 0;
}

//=============================================================
//语法格式：	int SDCommand2(unsigned int commandset, unsigned int arg, unsigned int* outaddr)
//实现功能：	向SD卡发送命令, 并接收128bit响应数据
//参数：		commandset	-	命令
//				arg			-	命令参数
//				outaddr		-	响应数据保存缓冲区首地址
//返回值：		正常退出返回0,超时或控制器错误返回1
//=============================================================
int SDCommandr2(unsigned int commandset, unsigned int arg, unsigned int* outaddr)
{
	int i;
	// Write Argument First
	*P_SD_ARGUMENT_DATA = arg;
	*P_SD_COMMAND_SETUP = commandset;
	for (i=0;i<4;i++)
	{
		if(WaitSDStatus(MASK_S_RespRegFull))
			return 1;
		*outaddr = *P_SD_RESPONSE_DATA;
		outaddr++;
	}
	if (WaitSDStatus(MASK_S_CmdComplete))
		return 1;
	*P_SD_INT_STATUS = MASK_S_ClrAllBits;
	return 0;
}

//=============================================================
//语法格式：	int SDCommand3(unsigned int commandset, unsigned int arg, unsigned int* outaddr)
//实现功能：	向SD卡发送命令, 并接收64bit响应数据
//参数：		commandset	-	命令
//				arg			-	命令参数
//				outaddr		-	响应数据保存缓冲区首地址
//返回值：		正常退出返回0,超时或控制器错误返回1
//=============================================================
int SDCommandr3(unsigned int commandset, unsigned int arg, unsigned int* outaddr)
{
	int i;
	g_sd_dmabusy = 1;
	// Write Argument First
	*P_SD_ARGUMENT_DATA = arg;
	*P_SD_COMMAND_SETUP = commandset;
	i = 0;
	while ((*P_SD_INT_STATUS & MASK_S_DataBufFull) == 0)
	{
		i = i + 1;
		if(i == 600000)
			return 1;

		if(!gSDCardInsert)
			return 1;
	}
	*outaddr = *P_SD_RX_DATA;
	i = 0;
	while ((*P_SD_INT_STATUS & MASK_S_DataBufFull) == 0)
	{
		i = i + 1;
		if(i == 600000)
			return 1;

		if(!gSDCardInsert)
			return 1;
	}
	*(outaddr+1) = *P_SD_RX_DATA;
	if (WaitSDStatus(MASK_S_DataComplete))
	{
		*P_SD_INT_STATUS = MASK_S_ClrAllBits;
		return 1;
	}
	*P_SD_INT_STATUS = MASK_S_ClrAllBits;
	return 0;
}

//=============================================================
//语法格式：	int SDDrv_ReadSector(unsigned int sector, unsigned int sector_num, unsigned char *buf)
//实现功能：	读扇区
//参数：		sector		-	扇区序号
//				sector_num	-	读取的扇区数量
//				buf			-	保存数据的缓冲区首地址
//返回值：		正常退出返回0,非正常退出返回1
//=============================================================
int SDDrv_ReadSector(unsigned int sector, unsigned int sector_num, unsigned char *buf)
{
	int i, ret;
	if(DrvSDCReadMulCommand(sector))
		return 1;
	for(i=0; i<sector_num; i++)
	{
		ret = DrvSDCReadMulData(buf+i*512);
		//ret = ReadSectors(sector+i, 1, buf+i*512);
		if(ret == 1)
		{
			DrvSDCReadMulStop();
			return ret;
		}
	}
	if(DrvSDCReadMulStop())
		return 1;
	return 0;
}

//=============================================================
//语法格式：	int	DrvSDCReadMulCommand(unsigned int block)
//实现功能：	启动读扇区操作
//参数：		block	-	扇区序号
//返回值：		正常退出返回0,非正常退出返回1
//=============================================================
int	DrvSDCReadMulCommand(unsigned int block)
{
	unsigned int response[4];
	g_sd_dmabusy = 1;
	SDCommand(MASK_CMD7, rca, response);
	*P_SD_ARGUMENT_DATA = rca;
	*P_SD_COMMAND_SETUP = MASK_CMD13;
	while((*P_SD_INT_STATUS & MASK_S_CmdComplete) == 0x00);
	response[0] = *P_SD_RESPONSE_DATA;
	*P_SD_INT_STATUS = MASK_S_ClrAllBits;
	if(SDCommand(MASK_CMD18,block<<9,response))
		return 1;
	return 0;
}

//=============================================================
//语法格式：	int	DrvSDCReadMulData(unsigned char *outaddr)
//实现功能：	从扇区读取数据
//参数：		outaddr	-	保存数据的缓冲区首地址
//返回值：		正常退出返回0,非正常退出返回1
//=============================================================
int	DrvSDCReadMulData(unsigned char *outaddr)
{
	unsigned int	i;
	unsigned int *realaddr;
	i=(unsigned int) outaddr;
	if((i & 0x03) == 0x00)
	{
		// USE DMA
		*P_DMA_CHANNEL0_CTRL = 0x0000;
		*P_DMA_AHB_SA0BA = (unsigned int)outaddr;
		*P_DMA_AHB_EA0BA = (unsigned int)outaddr + (1 << 9) - 4;
		*P_DMA_APB_SA0 = (unsigned int)P_SD_RX_DATA;
		*P_DMA_CHANNEL0_CTRL = C_DMA_APB_MIU|C_DMA_POLLING_MODE|C_DMA_REGULAR_MODE|C_DMA_SINGLE_BUF|C_DMA_32BIT_BURST|C_DMA_CH_EN;
		// Loop until DMA interrupt is set
		while ((*P_DMA_INT_STATUS & 0x1) == 0)
		{
			if(!gSDCardInsert)
				return 1;
		}
		// Clear Interrupt and Disable DMA channel
		*P_DMA_INT_STATUS = 0x1;
		*P_DMA_CHANNEL0_CTRL = 0x0000;
	}
	else
	{
		// Do Not USE DMA
		unsigned int	DataCount;
		unsigned int	Data;
		DataCount=512 >> 2;	// DataCount = 512 Byte / 4
		do
		{
			if(WaitSDStatus(MASK_S_DataBufFull))
				return 1;
			Data=*P_SD_RX_DATA;
			*outaddr++ = (char) Data;
			Data=Data >> 8;
			*outaddr++ = (char) Data;
			Data=Data >> 8;
			*outaddr++ = (char) Data;
			Data=Data >> 8;
			*outaddr++ = (char) Data;
			DataCount--;
		}while(DataCount != 0x00);
	}
	realaddr = (unsigned int *)((unsigned int)outaddr & 0x8fffffff);
	invalid_cache(realaddr);
	i = 0;
	while((*P_SD_INT_STATUS & MASK_S_DataComplete) == 0x00)
	{
		i++;
		if( i == 0xFFFFFF)
			return 1;
	}
	*P_SD_INT_STATUS = MASK_S_ClrAllBits;
	return 0;
}
#if 0
//=============================================================
//语法格式：	int	DrvSDCReadMulData_INT(unsigned char *outaddr)
//实现功能：	DMA方式读扇区初始化
//参数：		outaddr	-	保存数据的缓冲区首地址
//返回值：		正常退出返回0,非正常退出返回1
//=============================================================
int	DrvSDCReadMulData_INT(unsigned char *outaddr)
{
	// USE DMA
	*P_DMA_CHANNEL0_CTRL = 0x0000;
	*P_DMA_AHB_SA0BA = (unsigned int)outaddr;
	*P_DMA_AHB_EA0BA = (unsigned int)outaddr + ( 512 ) - 4;
	*P_DMA_APB_SA0 = (unsigned int)P_SD_RX_DATA;
	*P_DMA_CHANNEL0_CTRL = C_DMA_APB_MIU|C_DMA_POLLING_MODE|C_DMA_REGULAR_MODE|C_DMA_SINGLE_BUF|C_DMA_32BIT_BURST|C_DMA_INT_EN|C_DMA_CH_EN;
	return 0;
}
#endif

//=============================================================
//语法格式：	int DrvSDCReadMulStop(void)
//实现功能：	停止读扇区操作
//参数：		无
//返回值：		正常退出返回0,非正常退出返回1
//=============================================================
int DrvSDCReadMulStop(void)
{
	unsigned int response[4];
	unsigned int loopcnt;
	// Stop the controller
	*P_SD_COMMAND_SETUP = MASK_CMDSTOP;
	// Loop until controller idle
	while(*P_SD_INT_STATUS & MASK_S_ControllerBusy)
		if(!gSDCardInsert)
			return 1;
	*P_SD_INT_STATUS = MASK_S_ClrAllBits;
	// Stop the card
	SDCommand(MASK_CMD12, 0x00000000, response);
	loopcnt=0;
	do
	{
		if(SDCommand(MASK_CMD13, rca, response))
			return 1;
		loopcnt++;
		if(loopcnt == 0xFFFFFF)
			return 1;

	} while (response[0] != 0x0900);
	SDCommand(MASK_CMD7, rca, response);
	return 0;
}

//=============================================================
//语法格式：	int SDDrv_WriteSector(unsigned int block, unsigned int blocknum, unsigned char *outaddr)
//实现功能：	写扇区
//参数：		block		-	扇区序号
//				blocknum	-	读取的扇区数量
//				outaddr		-	保存数据的缓冲区首地址
//返回值：		正常退出返回0,非正常退出返回1
//=============================================================
int SDDrv_WriteSector(unsigned int block, unsigned int blocknum, unsigned char *outaddr)
{
	int i, ret;
	if(DrvSDCWriteMulCommand(block))
		return 1;
	for(i=0; i<blocknum; i++)
	{
		ret = DrvSDCWriteMulData(outaddr+i*512);
		if(ret == 1)
		{
			DrvSDCWriteMulStop();
			return ret;
		}
	}
	if(DrvSDCWriteMulStop())
		return 1;
	return 0;
}