S3C2440 SD卡驱动程序

/* ********************************************************************************************************* * Samsung ARM S3C2410 Software Frame * * (c) Copyright 2008-2010, LastRitter * All Rights Reserved * * File : * By : LastRitter ********************************************************************************************************* */ #include "Drives.h" extern sdiparam st_SDIParam; #define SDI_READ_ENDIANCHANGE //#define SDI_READ_DEBUG /* ********************************************************************************************************* * * * Description: * * Arguments : * * Returns : * * Note(s) : * ********************************************************************************************************* */ static uint32 SDI_PolRead(uint32 uiNumber,int32 *puiBuffer) { uint32 uiReadCount,status; #ifdef SDI_READ_ENDIANCHANGE uint8 *pucTemp,ucTemp; #endif rSDIDCON=(1<<19)|(1<<17)|(st_SDIParam.uiWide<<16)|(2<<12)|(uiNumber<<0)|1<<14; //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> if(uiNumber<2) // SINGLE_READ { do rSDICCON=(0x1<<9)|(0x1<<8)|0x51; // sht_resp, wait_resp, dat, start, CMD17 while(!SDI_CheckCMDend(17, 1)); //-- Check end of CMD17 } else // MULTI_READ { do rSDICCON=(0x1<<9)|(0x1<<8)|0x52; // sht_resp, wait_resp, dat, start, CMD18 while(!SDI_CheckCMDend(18, 1)); //-- Check end of CMD18 } //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> uiReadCount=0; while(uiReadCount<128*uiNumber) // 512*block bytes { if((rSDIDSTA&0x20)==0x20) // Check timeout { rSDIDSTA=0x1<<0x5; // Clear timeout flag break; } status=rSDIFSTA; if((status&0x1000)==0x1000) // Is Rx data? { puiBuffer[uiReadCount]=rSDIDAT; #ifdef SDI_READ_ENDIANCHANGE pucTemp=(uint8 *)(puiBuffer+uiReadCount); ucTemp=*pucTemp; *pucTemp=*(pucTemp+3); *(pucTemp+3)=ucTemp; ucTemp=*(pucTemp+1); *(pucTemp+1)=*(pucTemp+2); *(pucTemp+2)=ucTemp; // Uart_Printf("%08x,",*(puiBuffer-1)); #endif uiReadCount++; } } Uart_Printf("read finish\n"); return 0; } /* ********************************************************************************************************* * * * Description: * * Arguments : * * Returns : * * Note(s) : * ********************************************************************************************************* */ static int32 *psi_RxBuffer; static uint32 ui_RxCount=0; static void __irq SDI_ReadIRQ(void) { unsigned int i,status; status=rSDIFSTA; if( (status&0x200) == 0x200 ) // Check Last interrupt? { for(i=(status & 0x7f)/4;i>0;i--) //read reamin { *psi_RxBuffer++=rSDIDAT; ui_RxCount++; } } else if( (status&0x80) == 0x80 ) // Check Half interrupt? { for(i=0;i<8;i++) { *psi_RxBuffer++=rSDIDAT; ui_RxCount++; } } //ClearPending(INT_SDI); } /* ********************************************************************************************************* * * * Description: * * Arguments : * * Returns : * * Note(s) : * ********************************************************************************************************* */ static uint32 SDI_IntRead(uint32 uiNumber,int32 uiaBuffer[]) { psi_RxBuffer=uiaBuffer; ui_RxCount=0; // Uart_Printf("Read Mode : Interrupt\n"); //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> if(uiNumber<2) // SINGLE_READ { do rSDICCON=(0x1<<9)|(0x1<<8)|0x51; // sht_resp, wait_resp, dat, start, CMD17 while(!SDI_CheckCMDend(17, 1)); //-- Check end of CMD17 } else // MULTI_READ { do rSDICCON=(0x1<<9)|(0x1<<8)|0x52; // sht_resp, wait_resp, dat, start, CMD18 while(!SDI_CheckCMDend(18, 1)); //-- Check end of CMD18 } //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> pISR_SDI=(unsigned)SDI_ReadIRQ; //rINTMSK = ~(INT_SDI); rSDIIMSK=5; // Last & Rx FIFO half int. while(ui_RxCount<128*uiNumber); // rINTMSK |= (INT_SDI); rSDIIMSK=0; // All mask return 0; } /* ********************************************************************************************************* * * * Description: * * Arguments : * * Returns : * * Note(s) : * ********************************************************************************************************* */ static uint32 ui_DMAReadEnd=0; static void __irq SDI_ReadEndDMA(void) { // ClearPending(INT_DMA0); rSDIDCON &= ~0x8000; //clear DMA bit, added by hzh ui_DMAReadEnd=1; } /* ********************************************************************************************************* * * * Description: * * Arguments : * * Returns : * * Note(s) : * ********************************************************************************************************* */ static uint32 SDI_DMARead(uint32 uiNumber,int32 uiaBuffer[],int32 siWide) { ui_DMAReadEnd=0; // Uart_Printf("Read Mode : DMA\n"); //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> pISR_DMA0=(unsigned)SDI_ReadEndDMA; // rINTMSK = ~(INT_DMA0); //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> rDISRC0=(int)(SDIDAT); // SDIDAT rDISRCC0=(1<<1)+(1<<0); // APB, fix rDIDST0=(unsigned int)(uiaBuffer); // Rx_buffer rDIDSTC0=(0<<1)+(0<<0); // AHB, inc rDCON0=(1UL<<31)+(0<<30)+(1<<29)+(0<<28)+(0<<27)+(2<<24)+(1<<23)+(1<<22)+(2<<20)+128*uiNumber; //handshake, sync PCLK, TC int, single tx, single service, SDI, H/W request, //auto-reload off, word, 128blk*num rDMASKTRIG0=(0<<2)+(1<<1)+0; //no-stop, DMA2 channel on, no-sw trigger rSDIDCON=(1<<19)|(1<<17)|(siWide<<16)|(1<<15)|(2<<12)|(uiNumber<<0); // Rx after rsp, blk, 4bit bus, dma enable, Rx start, blk num //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> if(uiNumber<2) // SINGLE_READ { do rSDICCON=(0x1<<9)|(0x1<<8)|0x51; // sht_resp, wait_resp, dat, start, CMD17 while(!SDI_CheckCMDend(17, 1)); //-- Check end of CMD17 } else // MULTI_READ { do rSDICCON=(0x1<<9)|(0x1<<8)|0x52; // sht_resp, wait_resp, dat, start, CMD18 while(!SDI_CheckCMDend(18, 1)); //-- Check end of CMD18 } //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> #if( SD_DEBUG ) Uart_Printf("%x,%x,%x,%x,%x\n", rSDICCON, rSDICSTA, rSDIDCON, rSDIFSTA, block); Uart_Printf("%x,%x,%x,%x,%x,%x,%x\n", rDISRCC0, rDISRC0, rDIDSTC0, rDIDST0, rDCON0, rDMASKTRIG0, rDSTAT0); #endif //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> while(!ui_DMAReadEnd); // rINTMSK |= (INT_DMA0); rDMASKTRIG0=(1<<2); //DMA0 stop return 0; } /* ********************************************************************************************************* * * * Description: * * Arguments : * * Returns : * * Note(s) : Check end of DATA * *********************************************************************