[PATCH v2 3/3] mtd: nand: mediatek: add support for MT2712 NAND FLASH Controller

Xiaolei Li xiaolei.li at mediatek.com
Thu May 11 21:33:23 PDT 2017


MT2712 NAND FLASH Controller is similar to MT2701 except those following:
(1) MT2712 supports up to 148B spare size per 1KB size sector (the same
    with 74B spare size per 512B size sector). There are three new spare
    format: 61, 67, 74.
(2) MT2712 supports up to 80 bit ecc strength. There are three new ecc
    strength level: 68, 72, 80.
(3) MT2712 ECC encode parity data register's start offset is 0x300, and
    different with 0x10 of MT2701.
(4) MT2712 improves ecc irq function. When ECC works in ECC_NFI_MODE,
    MT2701 will generate ecc irq number the same with ecc steps during
    page read. However, MT2712 can only generate one ecc irq.

Changes of this patch are:
(1) add two new variables named pg_irq_sel, encode_parity_reg0 in struct
    mtk_ecc_devdata.
(2) add three new ecc level: ECC_CNFG_68BIT, ECC_CNFG_72BIT,
    ECC_CNFG_80BIT.
(3) add new bitfield ECC_PG_IRQ_SEL for register ECC_IRQ_REG.
(4) add three new spare format: PAGEFMT_SPARE_61, PAGEFMT_SPARE_67,
    PAGEFMT_SPARE_74.
(5) add mt2712 nfc and ecc device compatiable and data.

Signed-off-by: Xiaolei Li <xiaolei.li at mediatek.com>
---
 drivers/mtd/nand/mtk_ecc.c  | 45 ++++++++++++++++++++++++++++++++++++----
 drivers/mtd/nand/mtk_nand.c | 50 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+), 4 deletions(-)

diff --git a/drivers/mtd/nand/mtk_ecc.c b/drivers/mtd/nand/mtk_ecc.c
index 94d0791..ac46fb0 100644
--- a/drivers/mtd/nand/mtk_ecc.c
+++ b/drivers/mtd/nand/mtk_ecc.c
@@ -28,6 +28,7 @@
 
 #define ECC_IDLE_MASK		BIT(0)
 #define ECC_IRQ_EN		BIT(0)
+#define ECC_PG_IRQ_SEL		BIT(1)
 #define ECC_OP_ENABLE		(1)
 #define ECC_OP_DISABLE		(0)
 
@@ -53,11 +54,13 @@
 #define		ECC_CNFG_52BIT		(0x11)
 #define		ECC_CNFG_56BIT		(0x12)
 #define		ECC_CNFG_60BIT		(0x13)
+#define		ECC_CNFG_68BIT		(0x14)
+#define		ECC_CNFG_72BIT		(0x15)
+#define		ECC_CNFG_80BIT		(0x16)
 #define		ECC_MODE_SHIFT		(5)
 #define		ECC_MS_SHIFT		(16)
 #define ECC_ENCDIADDR		(0x08)
 #define ECC_ENCIDLE		(0x0C)
-#define ECC_ENCPAR(x)		(0x10 + (x) * sizeof(u32))
 #define ECC_ENCIRQ_EN		(0x80)
 #define ECC_ENCIRQ_STA		(0x84)
 #define ECC_DECCON		(0x100)
@@ -80,6 +83,8 @@
 struct mtk_ecc_devdata {
 	u32 err_mask;
 	u8 max_ecc_strength;
+	u32 encode_parity_reg0;
+	int pg_irq_sel;
 };
 
 struct mtk_ecc {
@@ -207,6 +212,15 @@ static void mtk_ecc_config(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
 	case 60:
 		ecc_bit = ECC_CNFG_60BIT;
 		break;
+	case 68:
+		ecc_bit = ECC_CNFG_68BIT;
+		break;
+	case 72:
+		ecc_bit = ECC_CNFG_72BIT;
+		break;
+	case 80:
+		ecc_bit = ECC_CNFG_80BIT;
+		break;
 	default:
 		dev_err(ecc->dev, "invalid strength %d, default to 4 bits\n",
 			config->strength);
@@ -318,6 +332,7 @@ struct mtk_ecc *of_mtk_ecc_get(struct device_node *of_node)
 int mtk_ecc_enable(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
 {
 	enum mtk_ecc_operation op = config->op;
+	u16 reg_val;
 	int ret;
 
 	ret = mutex_lock_interruptible(&ecc->lock);
@@ -331,7 +346,15 @@ int mtk_ecc_enable(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
 	writew(ECC_OP_ENABLE, ecc->regs + ECC_CTL_REG(op));
 
 	init_completion(&ecc->done);
-	writew(ECC_IRQ_EN, ecc->regs + ECC_IRQ_REG(op));
+	reg_val = ECC_IRQ_EN;
+	/*
+	 * For ECC_NFI_MODE, if ecc->devdata->pg_irq_sel is 1, then it
+	 * means this chip can only generate one ecc irq during page
+	 * read / write. If is 0, generate one ecc irq each ecc step.
+	 */
+	if ((ecc->devdata->pg_irq_sel) && (config->mode == ECC_NFI_MODE))
+		reg_val |= ECC_PG_IRQ_SEL;
+	writew(reg_val, ecc->regs + ECC_IRQ_REG(op));
 
 	return 0;
 }
@@ -401,7 +424,9 @@ int mtk_ecc_encode(struct mtk_ecc *ecc, struct mtk_ecc_config *config,
 	len = (config->strength * ECC_PARITY_BITS + 7) >> 3;
 
 	/* write the parity bytes generated by the ECC back to temp buffer */
-	__ioread32_copy(ecc->eccdata, ecc->regs + ECC_ENCPAR(0), round_up(len, 4));
+	__ioread32_copy(ecc->eccdata,
+			ecc->regs + ecc->devdata->encode_parity_reg0,
+			round_up(len, 4));
 
 	/* copy into possibly unaligned OOB region with actual length */
 	memcpy(data + bytes, ecc->eccdata, len);
@@ -417,7 +442,7 @@ int mtk_ecc_encode(struct mtk_ecc *ecc, struct mtk_ecc_config *config,
 void mtk_ecc_adjust_strength(struct mtk_ecc *ecc, u32 *p)
 {
 	u32 ecc_level[] = {4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36,
-				40, 44, 48, 52, 56, 60};
+				40, 44, 48, 52, 56, 60, 68, 72, 80};
 	int i;
 
 	if (*p >= ecc->devdata->max_ecc_strength) {
@@ -442,12 +467,24 @@ void mtk_ecc_adjust_strength(struct mtk_ecc *ecc, u32 *p)
 static const struct mtk_ecc_devdata mtk_ecc_devdata_mt2701 = {
 	.err_mask = 0x3f,
 	.max_ecc_strength = 60,
+	.encode_parity_reg0 = 0x10,
+	.pg_irq_sel = 0,
+};
+
+static const struct mtk_ecc_devdata mtk_ecc_devdata_mt2712 = {
+	.err_mask = 0x7f,
+	.max_ecc_strength = 80,
+	.encode_parity_reg0 = 0x300,
+	.pg_irq_sel = 1,
 };
 
 static const struct of_device_id mtk_ecc_dt_match[] = {
 	{
 		.compatible = "mediatek,mt2701-ecc",
 		.data = &mtk_ecc_devdata_mt2701,
+	}, {
+		.compatible = "mediatek,mt2712-ecc",
+		.data = &mtk_ecc_devdata_mt2712,
 	},
 	{},
 };
diff --git a/drivers/mtd/nand/mtk_nand.c b/drivers/mtd/nand/mtk_nand.c
index 1a64ea2..5bdeace 100644
--- a/drivers/mtd/nand/mtk_nand.c
+++ b/drivers/mtd/nand/mtk_nand.c
@@ -168,9 +168,12 @@ enum mtk_nfc_spare_format {
 	PAGEFMT_SPARE_50,
 	PAGEFMT_SPARE_51,
 	PAGEFMT_SPARE_52,
+	PAGEFMT_SPARE_61,
 	PAGEFMT_SPARE_62,
 	PAGEFMT_SPARE_63,
 	PAGEFMT_SPARE_64,
+	PAGEFMT_SPARE_67,
+	PAGEFMT_SPARE_74,
 };
 
 static const u32 mtk_nfc_spare_format_mt2701[] = {
@@ -187,9 +190,34 @@ enum mtk_nfc_spare_format {
 	[PAGEFMT_SPARE_50]	= (10 << 4),
 	[PAGEFMT_SPARE_51]	= (11 << 4),
 	[PAGEFMT_SPARE_52]	= (12 << 4),
+	[PAGEFMT_SPARE_61]	= (0 << 4),
 	[PAGEFMT_SPARE_62]	= (13 << 4),
 	[PAGEFMT_SPARE_63]	= (14 << 4),
 	[PAGEFMT_SPARE_64]	= (15 << 4),
+	[PAGEFMT_SPARE_67]	= (0 << 4),
+	[PAGEFMT_SPARE_74]	= (0 << 4),
+};
+
+static const u32 mtk_nfc_spare_format_mt2712[] = {
+	[PAGEFMT_SPARE_16]	= (0 << 16),
+	[PAGEFMT_SPARE_26]	= (1 << 16),
+	[PAGEFMT_SPARE_27]	= (2 << 16),
+	[PAGEFMT_SPARE_28]	= (3 << 16),
+	[PAGEFMT_SPARE_32]	= (4 << 16),
+	[PAGEFMT_SPARE_36]	= (5 << 16),
+	[PAGEFMT_SPARE_40]	= (6 << 16),
+	[PAGEFMT_SPARE_44]	= (7 << 16),
+	[PAGEFMT_SPARE_48]	= (8 << 16),
+	[PAGEFMT_SPARE_49]	= (9 << 16),
+	[PAGEFMT_SPARE_50]	= (10 << 16),
+	[PAGEFMT_SPARE_51]	= (11 << 16),
+	[PAGEFMT_SPARE_52]	= (12 << 16),
+	[PAGEFMT_SPARE_61]	= (14 << 16),
+	[PAGEFMT_SPARE_62]	= (13 << 16),
+	[PAGEFMT_SPARE_63]	= (15 << 16),
+	[PAGEFMT_SPARE_64]	= (16 << 16),
+	[PAGEFMT_SPARE_67]	= (17 << 16),
+	[PAGEFMT_SPARE_74]	= (18 << 16),
 };
 
 /*
@@ -200,6 +228,11 @@ enum mtk_nfc_spare_format {
 	16, 26, 27, 28, 32, 36, 40, 44,	48, 49, 50, 51, 52, 62, 63, 64, 255
 };
 
+static const u8 spare_size_mt2712[] = {
+	16, 26, 27, 28, 32, 36, 40, 44,	48, 49, 50, 51, 52, 61, 62, 63, 64, 67,
+	74, 255
+};
+
 static inline struct mtk_nfc_nand_chip *to_mtk_nand(struct nand_chip *nand)
 {
 	return container_of(nand, struct mtk_nfc_nand_chip, nand);
@@ -430,6 +463,9 @@ static int mtk_nfc_hw_runtime_config(struct mtd_info *mtd)
 	case 52:
 		fmt |= sparefmt[PAGEFMT_SPARE_52];
 		break;
+	case 61:
+		fmt |= sparefmt[PAGEFMT_SPARE_61];
+		break;
 	case 62:
 		fmt |= sparefmt[PAGEFMT_SPARE_62];
 		break;
@@ -439,6 +475,12 @@ static int mtk_nfc_hw_runtime_config(struct mtd_info *mtd)
 	case 64:
 		fmt |= sparefmt[PAGEFMT_SPARE_64];
 		break;
+	case 67:
+		fmt |= sparefmt[PAGEFMT_SPARE_67];
+		break;
+	case 74:
+		fmt |= sparefmt[PAGEFMT_SPARE_74];
+		break;
 	default:
 		dev_err(nfc->dev, "invalid spare per sector %d\n", spare);
 		return -EINVAL;
@@ -1395,10 +1437,18 @@ static int mtk_nfc_nand_chips_init(struct device *dev, struct mtk_nfc *nfc)
 	.spare_size = spare_size_mt2701,
 };
 
+static const struct mtk_nfc_devdata mtk_nfc_devdata_mt2712 = {
+	.spare_format = mtk_nfc_spare_format_mt2712,
+	.spare_size = spare_size_mt2712,
+};
+
 static const struct of_device_id mtk_nfc_id_table[] = {
 	{
 		.compatible = "mediatek,mt2701-nfc",
 		.data = &mtk_nfc_devdata_mt2701,
+	}, {
+		.compatible = "mediatek,mt2712-nfc",
+		.data = &mtk_nfc_devdata_mt2712,
 	},
 	{}
 };
-- 
1.9.1




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