/****************************************Copyright (c)****************************************************                               Guangzhou ZHIYUAN electronics Co.,LTD.**                                     **                                 http://www.zyinside.com****--------------File Info-------------------------------------------------------------------------------** File Name: 				sddriver.c** Last modified Date: 		2006.01.09** Last Version:			V1.0		** Description: 			API funciton of initializ,read,write SD/MMC卡 **							初始化、讀、寫 SD/MMC卡的 API 函數**------------------------------------------------------------------------------------------------------** Created By: 				MingYuan Zheng 鄭明遠** Created date: 			2006.01.09** Version: 				V1.0** Descriptions:			The original version 初始版本****------------------------------------------------------------------------------------------------------** Modified by:** Modified date:** Version:** Description:**********************************************************************************************************/#include "config.h"/* SD/MMC卡信息結構體變量 the information structure variable of SD/MMC Card */sd_struct sds = {0};			/* 超時時間單位表(單位:0.000000001ns) timeout unit table */const INT32U time_unit[8] = {1000000000,100000000,10000000,							 1000000,100000,10000,1000,100};/* 超時時間表 timeout value table */							 const INT8U time_value[16] = {0,10,12,13,15,20,25,30,                              35,40,45,50,55,60,70,80}; /* 超時時間因數表 timeout factor table */                              const INT8U r2w_fator[6] = {1,2,4,8,16,32};        /* 與中斷相關的全局變量 global variable releated with interrupt */#if SD_INTERRUPT_ENstatic DECLARE_WAIT_QUEUE_HEAD(wq);volatile int reading;           /* 讀卡(1)或寫卡(1)狀態 read card(1) or write card(1) status */INT8U *buffer;                  /* 讀卡或寫卡緩沖區 	the buffer of read or write card */INT32 bufcnt;                   /* 緩沖區計數器 		buffer counter */INT32 datalen;					/* 讀卡或寫卡數據長度   the data length of read or write card */volatile int error;#endif    volatile int card_insert;int card_change = 0; 			/* 卡改變,卡插入開拔出 */        volatile INT16U card_id = 0;		/* card slot identify, added 20060330 */    	/*       	***************************************************************************************************			     用戶API函數:  初始化,讀,寫,擦 SD卡  User API Function: Initialize,read,write,erase SD Card 					***************************************************************************************************	*//*********************************************************************************************************** Function name: SD_Initialize** Descriptions:  initialize SD/MMC card**                初始化SD/MMC卡	** Input: 		  sd_struct *sds: SD卡信息結構體 	sd_struct *sds: the information structure of SD Card** Output: 		  0:   正確    >0:   錯誤碼		  		0:  right		>0:  error code  ** Created by:    MingYuan Zheng 鄭明遠 ** Created Date:  2006-01-09 **-------------------------------------------------------------------------------------------------------** Modified by:** Modified Date: **------------------------------------------------------------------------------------------------------********************************************************************************************************/INT8U SD_Initialize(sd_struct *sds){	INT8U response[16], ret;	SD_HardWareInit();					    		/* 1. 初始化SD/MMC接口硬件   Initialize the hardware of SD/MMC interface */    ret = SD_ResetSD();   	if (ret!= SD_NO_ERR)							/* 2. 發出CMD0命令復位SD卡   send CMD0 command to reset SD/MMC card */        return ret;									 	 	sds->card_type = Card_Indentify();				/* 3. 判別卡的型號:SD或MMC卡 identify card type: SD or MMC card */					 		ret = SD_ActiveCard(sds);						/* 4. 激活SD/MMC卡			 active SD/MMC card */	if (ret != SD_NO_ERR)		return ret;	  	    	ret = SD_ReadAllCID(16, response);  			/* 5. 請所有卡發送CID寄存器  ask all card send their CID number */  	if (ret != SD_NO_ERR)  		return ret;    	  	if (sds->RCA == 0)  	{  	    card_id++;		  	    sds->RCA = card_id;						/* 給卡分配一個地址  assign a address */ 	}    	  		    ret = SD_GetRCA(sds->card_type, &sds->RCA);						/* 6. 得到卡的RCA  			 get the RCA of the card */   	if (ret != SD_NO_ERR)  		return ret;           ret = SD_GetCardInfo(sds);						/* 7. 讀CSD寄存器,獲取SD卡信息 	  read CSD register, get the information of SD card */    if (ret != SD_NO_ERR)       return ret;           SD_ClkToMax();									/* 8. 設置讀/寫SD/MMC時鐘到最大值 set clock of reading or writing SD/MMC to maximum */        return (SD_SetBlockLen(sds->RCA, SD_BLOCKSIZE));			/* 9. 設置塊的長度: 512Bytes 	  Set the block length: 512Bytes */}/*********************************************************************************************************** Function name: SD_ReadBlock** Descriptions:  read a block from SD/MMC card**                從SD/MMC卡中讀出一個塊** Input: 		  sd_struct *sds  : SD/MMC卡信息結構體 			sd_struct *sds  : the information structure of SD/MMC Card				  INT32U blockaddr: 塊地址          			INT32U blockaddr: the address of the block				  INT8U *recbuf   : 接收緩沖區,長度512Bytes		INT8U *recbuf   : the buffer of receive,length is 512Bytes** Output: 		  1:   成功    > 0:  錯誤碼						1:  sucessfully	 > 0:  error code   ** Created by:    MingYuan Zheng 鄭明遠 ** Created Date:  2006-01-09 **-------------------------------------------------------------------------------------------------------** Modified by:** Modified Date: **------------------------------------------------------------------------------------------------------********************************************************************************************************/INT8U SD_ReadBlock(sd_struct *sds, INT32U blockaddr, INT8U *recbuf){	INT8U ret,status[4];	INT32U stat = 0;		ret = SD_ReadCard_Status(sds->RCA, 4, status);	/* 讀取卡的狀態  	  	read the status of the card */	if (ret != SD_NO_ERR)		return ret;			ret = SD_SelectCard(sds->RCA);					/* CMD7,進入傳輸狀態  	CMD7, enter tranfer status */    if (ret != SD_NO_ERR)    	return ret;    	  	if (sds->card_type == CARDTYPE_SD)	    {												/* 卡為SD卡           	card is SD card */   		ret = SD_SetBusWidth(sds->RCA, 1);    		/* 設置卡為數據總線方式 set card to wide data bus  */    	if (ret != SD_NO_ERR)    		return ret;     }	#if SD_INTERRUPT_EN 	SDIIMSK = SDIIMSK_TOUT | SDIIMSK_DFIN | SDIIMSK_RX_LAST | SDIIMSK_RX_FULL;	reading = 1;	buffer = recbuf;                    			/* 數據緩沖區指針 	    buffer pointer */	bufcnt = 0;	datalen = SD_BLOCKSIZE;                  		/* 接收數據長度			receive data length */	error = SD_ERR_TIMEOUT_READ;					/* be initialized to error code */#endif 		if (sds->card_type == CARDTYPE_SD)			stat = SDIDCON_RACMD_1 | SDIDCON_BLK | SDIDCON_RX | SDIDCON_WIDE | 1 << 0;		else		stat = SDIDCON_RACMD_1 | SDIDCON_BLK | SDIDCON_RX | 1 << 0;		SDIBSIZE = SD_BLOCKSIZE;						/* 塊數據的長度 		block data length */	SDICON |= SDICON_FRESET;						/* 復位 FIFO			reset FIFO */			SDIDCON = stat;									/* 寫數據控制寄存器		write data control register */		 	ret = SD_ReadSingleBlock(blockaddr);			/* 讀單塊命令 			read single blocks command */						 	if (ret != SD_NO_ERR) 		return ret;#if SD_INTERRUPT_EN 	interruptible_sleep_on(&wq);					/* 進入可被中斷的睡眠狀態, 數據在中斷中自動接收 */		if (!card_insert) {		return SD_ERR_NO_CARD;						/* 卡未插入,返回錯誤 */	}	if (error) 	{												/* there is error, return error code */		return error;	}	ret = SD_NO_ERR;#else												/* 讀出數據 read data from sd card */  	ret = SD_ReadBlockData(SD_BLOCKSIZE, recbuf, sds->timeout_read);	#endif  	  	if (ret != SD_NO_ERR)												  		return ret;  	  	ret = SD_DeSelectCard();						/* CMD7, 退出傳輸狀態 */  		    return SD_NO_ERR;						}/*********************************************************************************************************** Function name: SD_WriteBlock** Descriptions:  write a block to SD/MMC card**                向SD/MMC卡中寫入一個塊	** Input: 		  sd_struct *sds  : SD/MMC卡信息結構體 			sd_struct *sds  : the information structure of SD/MMC Card				  INT32U blockaddr: 塊地址          			INT32U blockaddr: the address of the block				  INT8U *sendbuf  : 發送緩沖區,長度512Bytes	  	  INT8U *sendbuf  : the buffer of send,length is 512Bytes** Output: 		  1:   成功    > 0:  錯誤碼						1:  sucessfully	 > 0:  error code   ** Created by:    MingYuan Zheng 鄭明遠 ** Created Date:  2006-01-09 **-------------------------------------------------------------------------------------------------------** Modified by:** Modified Date: **------------------------------------------------------------------------------------------------------********************************************************************************************************/INT8U SD_WriteBlock(sd_struct *sds, INT32U blockaddr, INT8U *sendbuf){	INT8U ret,tmp[4];	INT32U stat = 0;		ret = SD_ReadCard_Status(sds->RCA, 4, tmp);		/* 讀取卡的狀態  	  	read the status of the card */	if (ret != SD_NO_ERR)		return ret;	ret = SD_SelectCard(sds->RCA);					/* CMD7,進入傳輸狀態  	CMD7, enter tranfer status */    if (ret != SD_NO_ERR)    	return ret;	  	if (sds->card_type == CARDTYPE_SD)	    {												/* 卡為SD卡           	card is SD card */   		ret = SD_SetBusWidth(sds->RCA, 1);    		/* 設置卡為數據總線方式 set card to wide data bus  */	    	if (ret != SD_NO_ERR)    		return ret;     }		#if SD_INTERRUPT_EN 	SDIIMSK = SDIIMSK_TOUT | SDIIMSK_DFIN | SDIIMSK_TX_EMP; 	reading = 0;	buffer = sendbuf;                    			/* 數據緩沖區指針 	    buffer pointer */	bufcnt = 0;	datalen = SD_BLOCKSIZE;                  		/* 發送數據長度			send data length */	error = SD_ERR_TIMEOUT_WRITE;					/* be initialized to error code */#endif			    if (sds->card_type == CARDTYPE_SD)	    	stat = SDIDCON_TARSP_1 | SDIDCON_BLK | SDIDCON_TX | SDIDCON_WIDE | 1 << 0;    else       	stat = SDIDCON_TARSP_1 | SDIDCON_BLK | SDIDCON_TX | 1 << 0;		SDIBSIZE = SD_BLOCKSIZE;           				/* 塊數據的長度 		block data length */	SDICON |= SDICON_FRESET;            			/* 復位 FIFO			reset FIFO */			SDIDCON = stat;                     			/* 寫數據控制寄存器		write data control register */		ret = SD_WriteSingleBlock(blockaddr);			/* 寫單塊命令 write single block */	if (ret != SD_NO_ERR)			return ret;#if SD_INTERRUPT_EN	interruptible_sleep_on(&wq);					/* 進入可被中斷的睡眠狀態, 數據自動接收 */		if (!card_insert) {		return SD_ERR_NO_CARD;						/* 卡未插入,返回錯誤 */	}	if (error) 	{												/* there is error, return error code */		return error;	}	ret = SD_NO_ERR;#else												/* 寫入數據到SD/MMC card  write data to SD/MMC card */	ret = SD_WriteBlockData(0, SD_BLOCKSIZE, sendbuf, sds->timeout_write);	/*   */#endif 	 	if (ret == SD_NO_ERR)							/* 讀Card Status寄存器, 檢查寫入是否成功 */ 	{												/* read Card Status register to check write wheather sucessfully */ 		ret = SD_ReadCard_Status(sds->RCA, 4, tmp); 		if (ret != SD_NO_ERR)		 			return ret;								/* 讀寄存器失敗 read register fail */