S5PV210(TQ210)学习笔记——Nand驱动之HWECC

时间：11-28 来源：互联网点击：

stat=chip->ecc.correct(mtd,p,chip->->ecc.correct(mtd,p,chip->oob_poi+mecc_pos[0]+
((chip->ecc.steps-eccsteps)*eccbytes),0);
if(stat==-1)
mtd->ecc_stats.failed++;
col=eccsize*(chip->ecc.steps+1-eccsteps);
}
return0;
}
staticints5p_nand_write_page(structmtd_info*mtd,structnand_chip*chip,
constuint8_t*buf,intoob_required)
{
inti,eccsize=chip->ecc.size;
inteccbytes=chip->ecc.bytes;
inteccsteps=chip->ecc.steps;
intsecc_start=mtd->oobsize-eccbytes;
uint8_t*ecc_calc=chip->buffers->ecccalc;
constuint8_t*p=buf;
uint32_t*eccpos=chip->ecc.layout->eccpos;
/*mainarea*/
for(i=0;eccsteps;eccsteps--,i+=eccbytes,p+=eccsize){
chip->ecc.hwctl(mtd,NAND_ECC_WRITE);
chip->write_buf(mtd,p,eccsize);
chip->ecc.calculate(mtd,p,&ecc_calc[i]);
}
for(i=0;iecc.total;i++)
chip->oob_poi[eccpos[i]]=ecc_calc[i];
/*sparearea*/
chip->ecc.hwctl(mtd,NAND_ECC_WRITE);
chip->write_buf(mtd,chip->oob_poi,secc_start);
chip->ecc.calculate(mtd,p,&ecc_calc[chip->ecc.total]);
for(i=0;i
chip->oob_poi[secc_start+i]=ecc_calc[chip->ecc.total+i];
chip->write_buf(mtd,chip->oob_poi+secc_start,eccbytes);
return0;
}
staticints5p_nand_read_oob(structmtd_info*mtd,structnand_chip*chip,
intpage)
{
uint8_t*ecc_calc=chip->buffers->ecccalc;
inteccbytes=chip->ecc.bytes;
intsecc_start=mtd->oobsize-eccbytes;
chip->cmdfunc(mtd,NAND_CMD_READOOB,0,page);
chip->ecc.hwctl(mtd,NAND_ECC_READ);
chip->read_buf(mtd,chip->oob_poi,secc_start);
chip->ecc.calculate(mtd,0,&ecc_calc[chip->ecc.total]);
chip->read_buf(mtd,chip->oob_poi+secc_start,eccbytes);
return0;
}
staticints5p_nand_write_oob(structmtd_info*mtd,structnand_chip*chip,
intpage)
{
intstatus=0;
inteccbytes=chip->ecc.bytes;
intsecc_start=mtd->oobsize-eccbytes;
uint8_t*ecc_calc=chip->buffers->ecccalc;
inti;
chip->cmdfunc(mtd,NAND_CMD_SEQIN,mtd->writesize,page);
/*sparearea*/
chip->ecc.hwctl(mtd,NAND_ECC_WRITE);
chip->write_buf(mtd,chip->oob_poi,secc_start);
chip->ecc.calculate(mtd,0,&ecc_calc[chip->ecc.total]);
for(i=0;i
chip->oob_poi[secc_start+i]=ecc_calc[chip->ecc.total+i];
chip->write_buf(mtd,chip->oob_poi+secc_start,eccbytes);
/*SendcommandtoprogramtheOOBdata*/
chip->cmdfunc(mtd,NAND_CMD_PAGEPROG,-1,-1);
status=chip->waitfunc(mtd,chip);
returnstatus&NAND_STATUS_FAIL?-EIO:0;
}
staticints5p_nand_probe(structplatform_device*pdev){
intret=0;
structresource*mem;
//硬件部分初始化
mem=platform_get_resource(pdev,IORESOURCE_MEM,0);
if(!mem){
dev_err(&pdev->dev,"cantgetI/Oresourcemem");
return-ENXIO;
}
s5p_nand_regs=(volatilestructs5p_nand_regs*)ioremap(mem->start,resource_size(mem));
if(s5p_nand_regs==NULL){
dev_err(&pdev->dev,"ioremapfailed");
ret=-EIO;
gotoerr_exit;
}
s5p_nand_clk=clk_get(&pdev->dev,"nand");
if(s5p_nand_clk==NULL){
dev_dbg(&pdev->dev,"getclkfailed");
ret=-ENODEV;
gotoerr_iounmap;
}
clk_enable(s5p_nand_clk);
//s5p_nand_regs->nfconf&=~(0xfff<4);
//s5p_nand_regs->nfconf|=(3<12)|(5<8)|(3<4);
//s5p_nand_regs->nfcont|=3;
//分配驱动相关结构体
nand_chip=(structnand_chip*)kzalloc(sizeof(structnand_chip),GFP_KERNEL);
if(nand_chip==NULL){
dev_err(&pdev->dev,"failedtoallocatenand_chipstructure");
ret=-ENOMEM;
gotoerr_clk_put;
}
s5p_mtd_info=(structmtd_info*)kzalloc(sizeof(structmtd_info),GFP_KERNEL);
if(s5p_mtd_info==NULL){
dev_err(&pdev->dev,"failedtoallocatemtd_infostructure");
ret=-ENOMEM;
gotoerr_free_chip;
}
//设置驱动相关结构体
nand_chip->IO_ADDR_R=(unsignedchar*)&s5p_nand_regs->nfdata;
nand_chip->IO_ADDR_W=(unsignedchar*)&s5p_nand_regs->nfdata;
nand_chip->cmd_ctrl=s5p_nand_cmd_ctrl;
nand_chip->dev_ready=s5p_nand_ready;
nand_chip->ecc.mode=NAND_ECC_HW;
nand_chip->ecc.hwctl=s5p_ecc_hwctl;
nand_chip->ecc.calculate=s5p_ecc_calculate;
nand_chip->ecc.correct=s5p_ecc_correct;
nand_chip->ecc.read_oob=s5p_nand_read_oob;
nand_chip->ecc.write_oob=s5p_nand_write_oob;
nand_chip->ecc.read_page=s5p_nand_read_page;
nand_chip->nand_chip->ecc.w

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