S5PV210之Nand flash驱动编写

时间：12-10 来源：互联网点击：

static struct mtd_partition s5p_nand_partions[] = {
[0] = {
.name = "bootloader",
.offset = 0,
.size = SZ_1M,
},
[1] = {
.name = "kernel",
.offset = MTDPART_OFS_APPEND,
.size = 5*SZ_1M,
},
[2] = {
.name = "rootfs",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
},
};
static void s5p_nand_select_chip(struct mtd_info *mtd, int chipnr){
if(chipnr == -1){
s5p_nand_regs->nfcont |= (1<<1);
}
else{
s5p_nand_regs->nfcont &= ~(1<<1);
}
}
static void s5p_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
if (ctrl & NAND_CLE){
s5p_nand_regs->nfcmmd = cmd;
}
else{
s5p_nand_regs->nfaddr = cmd;
}
}
static int s5p_nand_ready(struct mtd_info *mtd){
return (s5p_nand_regs->nfstat & 0x1);
}
static int s5p_nand_probe(struct platform_device *pdev){
int ret = 0;
struct resource *mem;
//硬件部分初始化
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "can't get I/O resource mem\n");
return -ENXIO;
}
s5p_nand_regs = (struct s5p_nand_regs *)ioremap(mem->start, resource_size(mem));
if (s5p_nand_regs == NULL) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = -EIO;
goto err_exit;
}
s5p_nand_ecc = (struct s5p_nand_ecc *)ioremap(0xB0E20000, sizeof(struct s5p_nand_ecc));
if(s5p_nand_ecc == NULL){
dev_err(&pdev->dev, "ioremap failed\n");
ret = -EIO;
goto err_iounmap;
}
s5p_nand_clk = clk_get(&pdev->dev, "nand");
if(s5p_nand_clk == NULL){

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