3  * JZ4740 ECC controller driver
45 static void jz4740_ecc_reset(struct ingenic_ecc *ecc, bool calc_ecc)  in jz4740_ecc_reset()  argument
50 	writel(0, ecc->base + JZ_REG_NAND_IRQ_STAT);  in jz4740_ecc_reset()
52 	/* Initialize and enable ECC hardware */  in jz4740_ecc_reset()
53 	reg = readl(ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_reset()
57 	if (calc_ecc) /* calculate ECC from data */  in jz4740_ecc_reset()
59 	else /* correct data from ECC */  in jz4740_ecc_reset()
62 	writel(reg, ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_reset()
65 static int jz4740_ecc_calculate(struct ingenic_ecc *ecc,  in jz4740_ecc_calculate()  argument
73 	jz4740_ecc_reset(ecc, true);  in jz4740_ecc_calculate()
76 		status = readl(ecc->base + JZ_REG_NAND_IRQ_STAT);  in jz4740_ecc_calculate()
82 	reg = readl(ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_calculate()
84 	writel(reg, ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_calculate()
87 		ecc_code[i] = readb(ecc->base + JZ_REG_NAND_PAR0 + i);  in jz4740_ecc_calculate()
91 	 * ECC, otherwise we will get in trouble when doing subpage writes.  in jz4740_ecc_calculate()
117 static int jz4740_ecc_correct(struct ingenic_ecc *ecc,  in jz4740_ecc_correct()  argument
125 	jz4740_ecc_reset(ecc, false);  in jz4740_ecc_correct()
128 		writeb(ecc_code[i], ecc->base + JZ_REG_NAND_PAR0 + i);  in jz4740_ecc_correct()
130 	reg = readl(ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_correct()
132 	writel(reg, ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_correct()
135 		status = readl(ecc->base + JZ_REG_NAND_IRQ_STAT);  in jz4740_ecc_correct()
141 	reg = readl(ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_correct()
143 	writel(reg, ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_correct()
152 			error = readl(ecc->base + JZ_REG_NAND_ERR(i));  in jz4740_ecc_correct()
164 static void jz4740_ecc_disable(struct ingenic_ecc *ecc)  in jz4740_ecc_disable()  argument
168 	writel(0, ecc->base + JZ_REG_NAND_IRQ_STAT);  in jz4740_ecc_disable()
169 	reg = readl(ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_disable()
171 	writel(reg, ecc->base + JZ_REG_NAND_ECC_CTRL);  in jz4740_ecc_disable()
181 	{ .compatible = "ingenic,jz4740-ecc", .data = &jz4740_ecc_ops },
189 		.name	= "jz4740-ecc",
196 MODULE_DESCRIPTION("Ingenic JZ4740 ECC controller driver");