SDMA transfer from NAND flash in AM3517

Hi,

I would like to know how to do sDMA trasfer from NAND flash.

The below is a source code of sDMA of my customer.

---------------

static void dma_read(UCHAR* dst_addr, ULONG len)

{
unsigned int sdmaChNum=10;
ULONG* pd = (ULONG*)dst_addr;
ULONG src = BSP_NAND_REGS_PA+0x01F0;
ULONG dst = OALVAtoPA(dst_addr);

PutTextLn("DMA start");

CacheDataInvalidateBuff(dst_addr, len);

/* CSDP */
sdmaRegs->CH[sdmaChNum].CSDP
= CSL_FMKT(SDMA_CSDP_SRC_ENDIAN,LITTLEENDIAN) /* LITTLEENDIAN,BIGENDIAN */
| CSL_FMK (SDMA_CSDP_SRC_ENDIAN_LOCK,0) /* ?? */
| CSL_FMKT(SDMA_CSDP_DST_ENDIAN,LITTLEENDIAN) /* LITTLEENDIAN,BIGENDIAN */
| CSL_FMK (SDMA_CSDP_DST_ENDIAN_LOCK,0) /* ?? */
| CSL_FMK (SDMA_CSDP_WRITE_MODE,0)
| CSL_FMKT(SDMA_CSDP_DST_BURST,1BYTE) /* 1BYTE,16BYTE,32BYTE,64BYTE */
| CSL_FMKT(SDMA_CSDP_DST_PACKED,NONPACKED) /* NONPACKED,PACKED */
| CSL_FMKT(SDMA_CSDP_SRC_BURST,1BYTE)
| CSL_FMKT(SDMA_CSDP_SRC_PACKED,NONPACKED) /* NONPACKED,PACKED */
| CSL_FMKT(SDMA_CSDP_DATA_TYPE,16BIT); /* 8BIT,16BIT,32BIT */

/* CEN : Element per Frame (24bit) */
len /= 2;
sdmaRegs->CH[sdmaChNum].CEN = len;

/* CFN : Frame per Block (16bit) */
sdmaRegs->CH[sdmaChNum].CFN = 1;

/* Src and Dst */
sdmaRegs->CH[sdmaChNum].CSSA = src;
sdmaRegs->CH[sdmaChNum].CDSA = dst;

/* CCR */
sdmaRegs->CH[sdmaChNum].CCR
= CSL_FMKT(SDMA_CCR_WRITE_PRIORITY, HIGH) /* LOW,HIGH */
| CSL_FMKT(SDMA_CCR_BUFFERING, DISABLE) /* ENABLE,DISABLE */
| CSL_FMK (SDMA_CCR_SEL_SRC_DST_SYNC, 1)
| CSL_FMKT(SDMA_CCR_PREFETCH, DISABLE) /* DISABLE,ENABLE */
| CSL_FMKT(SDMA_CCR_SUPERVISOR, DISABLE) /* DISABLE,ENABLE */
| CSL_FMKT(SDMA_CCR_SECURE, DISABLE) /* DISABLE,ENABLE */
| CSL_FMK (SDMA_CCR_SYNCHRO_CONTROL_UPPER ,0)
| CSL_FMK (SDMA_CCR_BS, 0)
| CSL_FMKT(SDMA_CCR_TRANSPARENT_COPY, DISABLE) /* DISABLE,ENABLE */
| CSL_FMKT(SDMA_CCR_CONST_FILL, DISABLE) /* DISABLE,ENABLE */
| CSL_FMK (SDMA_CCR_DST_AMODE, 1) /* 0::CONST,1:POST_INC,2:SingleIndex,3:DblIndex */
| CSL_FMK (SDMA_CCR_SRC_AMODE, 0) /* 0::CONST,1:POST_INC,2:SingleIndex,3:DblIndex */
| CSL_FMKT(SDMA_CCR_WR_ACTIVE, INACTIVE) /* INACTIVE,ACTIVE */
| CSL_FMKT(SDMA_CCR_RD_ACTIVE, INACTIVE) /* INACTIVE,ACTIVE */
| CSL_FMK (SDMA_CCR_SUSPEND_SENSITIVE, 0)
| CSL_FMKT(SDMA_CCR_CHANNEL, DISABLE) /* DISABLE,ENABLE */
| CSL_FMKT(SDMA_CCR_READ_PRIORITY, HIGH) /* LOW,HIGH */
| CSL_FMK (SDMA_CCR_FS, 0)
| CSL_FMK (SDMA_CCR_SYNCHRO_CONTROL, 0);


/* INDEX */
sdmaRegs->CH[sdmaChNum].CSEI = 1; /* Source Element Index */
sdmaRegs->CH[sdmaChNum].CSFI = 1; /* Source Frame Index */
sdmaRegs->CH[sdmaChNum].CDEI = 1; /* Dst Element Index */
sdmaRegs->CH[sdmaChNum].CDFI = 1; /* Dst Frame Index */

sdmaRegs->CH[sdmaChNum].CICR = 0x0FFF; /* Interrupt Ebable */

/* START DMA */
CSL_FINST( sdmaRegs->CH[sdmaChNum].CCR, SDMA_CCR_CHANNEL, ENABLE);

while( (sdmaRegs->CH[sdmaChNum].CSR & 0x28) == 0 ) {}

PutTextLn("DMA end");
}

------------

I checked the above source code based on "SDMA Basic Programming Model". But I could not find any issue.

Customer said me. This code works and transfer is completed. But the data of memory is not changed.

Could you find something wrong in the above source code?

Also I  posted the  dump list of DMA register.