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path: root/drivers/mtd/nand/mtk_ecc.c
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Diffstat (limited to 'drivers/mtd/nand/mtk_ecc.c')
-rw-r--r--drivers/mtd/nand/mtk_ecc.c126
1 files changed, 95 insertions, 31 deletions
diff --git a/drivers/mtd/nand/mtk_ecc.c b/drivers/mtd/nand/mtk_ecc.c
index c51d214d169e..40d86a861a70 100644
--- a/drivers/mtd/nand/mtk_ecc.c
+++ b/drivers/mtd/nand/mtk_ecc.c
@@ -34,34 +34,28 @@
#define ECC_ENCCON (0x00)
#define ECC_ENCCNFG (0x04)
-#define ECC_MODE_SHIFT (5)
#define ECC_MS_SHIFT (16)
#define ECC_ENCDIADDR (0x08)
#define ECC_ENCIDLE (0x0C)
-#define ECC_ENCIRQ_EN (0x80)
-#define ECC_ENCIRQ_STA (0x84)
#define ECC_DECCON (0x100)
#define ECC_DECCNFG (0x104)
#define DEC_EMPTY_EN BIT(31)
#define DEC_CNFG_CORRECT (0x3 << 12)
#define ECC_DECIDLE (0x10C)
#define ECC_DECENUM0 (0x114)
-#define ECC_DECDONE (0x124)
-#define ECC_DECIRQ_EN (0x200)
-#define ECC_DECIRQ_STA (0x204)
#define ECC_TIMEOUT (500000)
#define ECC_IDLE_REG(op) ((op) == ECC_ENCODE ? ECC_ENCIDLE : ECC_DECIDLE)
#define ECC_CTL_REG(op) ((op) == ECC_ENCODE ? ECC_ENCCON : ECC_DECCON)
-#define ECC_IRQ_REG(op) ((op) == ECC_ENCODE ? \
- ECC_ENCIRQ_EN : ECC_DECIRQ_EN)
struct mtk_ecc_caps {
u32 err_mask;
const u8 *ecc_strength;
+ const u32 *ecc_regs;
u8 num_ecc_strength;
- u32 encode_parity_reg0;
+ u8 ecc_mode_shift;
+ u32 parity_bits;
int pg_irq_sel;
};
@@ -89,6 +83,46 @@ static const u8 ecc_strength_mt2712[] = {
40, 44, 48, 52, 56, 60, 68, 72, 80
};
+static const u8 ecc_strength_mt7622[] = {
+ 4, 6, 8, 10, 12, 14, 16
+};
+
+enum mtk_ecc_regs {
+ ECC_ENCPAR00,
+ ECC_ENCIRQ_EN,
+ ECC_ENCIRQ_STA,
+ ECC_DECDONE,
+ ECC_DECIRQ_EN,
+ ECC_DECIRQ_STA,
+};
+
+static int mt2701_ecc_regs[] = {
+ [ECC_ENCPAR00] = 0x10,
+ [ECC_ENCIRQ_EN] = 0x80,
+ [ECC_ENCIRQ_STA] = 0x84,
+ [ECC_DECDONE] = 0x124,
+ [ECC_DECIRQ_EN] = 0x200,
+ [ECC_DECIRQ_STA] = 0x204,
+};
+
+static int mt2712_ecc_regs[] = {
+ [ECC_ENCPAR00] = 0x300,
+ [ECC_ENCIRQ_EN] = 0x80,
+ [ECC_ENCIRQ_STA] = 0x84,
+ [ECC_DECDONE] = 0x124,
+ [ECC_DECIRQ_EN] = 0x200,
+ [ECC_DECIRQ_STA] = 0x204,
+};
+
+static int mt7622_ecc_regs[] = {
+ [ECC_ENCPAR00] = 0x10,
+ [ECC_ENCIRQ_EN] = 0x30,
+ [ECC_ENCIRQ_STA] = 0x34,
+ [ECC_DECDONE] = 0x11c,
+ [ECC_DECIRQ_EN] = 0x140,
+ [ECC_DECIRQ_STA] = 0x144,
+};
+
static inline void mtk_ecc_wait_idle(struct mtk_ecc *ecc,
enum mtk_ecc_operation op)
{
@@ -107,32 +141,30 @@ static inline void mtk_ecc_wait_idle(struct mtk_ecc *ecc,
static irqreturn_t mtk_ecc_irq(int irq, void *id)
{
struct mtk_ecc *ecc = id;
- enum mtk_ecc_operation op;
u32 dec, enc;
- dec = readw(ecc->regs + ECC_DECIRQ_STA) & ECC_IRQ_EN;
+ dec = readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECIRQ_STA])
+ & ECC_IRQ_EN;
if (dec) {
- op = ECC_DECODE;
- dec = readw(ecc->regs + ECC_DECDONE);
+ dec = readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECDONE]);
if (dec & ecc->sectors) {
/*
* Clear decode IRQ status once again to ensure that
* there will be no extra IRQ.
*/
- readw(ecc->regs + ECC_DECIRQ_STA);
+ readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECIRQ_STA]);
ecc->sectors = 0;
complete(&ecc->done);
} else {
return IRQ_HANDLED;
}
} else {
- enc = readl(ecc->regs + ECC_ENCIRQ_STA) & ECC_IRQ_EN;
- if (enc) {
- op = ECC_ENCODE;
+ enc = readl(ecc->regs + ecc->caps->ecc_regs[ECC_ENCIRQ_STA])
+ & ECC_IRQ_EN;
+ if (enc)
complete(&ecc->done);
- } else {
+ else
return IRQ_NONE;
- }
}
return IRQ_HANDLED;
@@ -160,7 +192,7 @@ static int mtk_ecc_config(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
/* configure ECC encoder (in bits) */
enc_sz = config->len << 3;
- reg = ecc_bit | (config->mode << ECC_MODE_SHIFT);
+ reg = ecc_bit | (config->mode << ecc->caps->ecc_mode_shift);
reg |= (enc_sz << ECC_MS_SHIFT);
writel(reg, ecc->regs + ECC_ENCCNFG);
@@ -171,9 +203,9 @@ static int mtk_ecc_config(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
} else {
/* configure ECC decoder (in bits) */
dec_sz = (config->len << 3) +
- config->strength * ECC_PARITY_BITS;
+ config->strength * ecc->caps->parity_bits;
- reg = ecc_bit | (config->mode << ECC_MODE_SHIFT);
+ reg = ecc_bit | (config->mode << ecc->caps->ecc_mode_shift);
reg |= (dec_sz << ECC_MS_SHIFT) | DEC_CNFG_CORRECT;
reg |= DEC_EMPTY_EN;
writel(reg, ecc->regs + ECC_DECCNFG);
@@ -291,7 +323,12 @@ int mtk_ecc_enable(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
*/
if (ecc->caps->pg_irq_sel && config->mode == ECC_NFI_MODE)
reg_val |= ECC_PG_IRQ_SEL;
- writew(reg_val, ecc->regs + ECC_IRQ_REG(op));
+ if (op == ECC_ENCODE)
+ writew(reg_val, ecc->regs +
+ ecc->caps->ecc_regs[ECC_ENCIRQ_EN]);
+ else
+ writew(reg_val, ecc->regs +
+ ecc->caps->ecc_regs[ECC_DECIRQ_EN]);
}
writew(ECC_OP_ENABLE, ecc->regs + ECC_CTL_REG(op));
@@ -310,13 +347,17 @@ void mtk_ecc_disable(struct mtk_ecc *ecc)
/* disable it */
mtk_ecc_wait_idle(ecc, op);
- if (op == ECC_DECODE)
+ if (op == ECC_DECODE) {
/*
* Clear decode IRQ status in case there is a timeout to wait
* decode IRQ.
*/
- readw(ecc->regs + ECC_DECIRQ_STA);
- writew(0, ecc->regs + ECC_IRQ_REG(op));
+ readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECDONE]);
+ writew(0, ecc->regs + ecc->caps->ecc_regs[ECC_DECIRQ_EN]);
+ } else {
+ writew(0, ecc->regs + ecc->caps->ecc_regs[ECC_ENCIRQ_EN]);
+ }
+
writew(ECC_OP_DISABLE, ecc->regs + ECC_CTL_REG(op));
mutex_unlock(&ecc->lock);
@@ -367,11 +408,11 @@ int mtk_ecc_encode(struct mtk_ecc *ecc, struct mtk_ecc_config *config,
mtk_ecc_wait_idle(ecc, ECC_ENCODE);
/* Program ECC bytes to OOB: per sector oob = FDM + ECC + SPARE */
- len = (config->strength * ECC_PARITY_BITS + 7) >> 3;
+ len = (config->strength * ecc->caps->parity_bits + 7) >> 3;
/* write the parity bytes generated by the ECC back to temp buffer */
__ioread32_copy(ecc->eccdata,
- ecc->regs + ecc->caps->encode_parity_reg0,
+ ecc->regs + ecc->caps->ecc_regs[ECC_ENCPAR00],
round_up(len, 4));
/* copy into possibly unaligned OOB region with actual length */
@@ -404,22 +445,42 @@ void mtk_ecc_adjust_strength(struct mtk_ecc *ecc, u32 *p)
}
EXPORT_SYMBOL(mtk_ecc_adjust_strength);
+unsigned int mtk_ecc_get_parity_bits(struct mtk_ecc *ecc)
+{
+ return ecc->caps->parity_bits;
+}
+EXPORT_SYMBOL(mtk_ecc_get_parity_bits);
+
static const struct mtk_ecc_caps mtk_ecc_caps_mt2701 = {
.err_mask = 0x3f,
.ecc_strength = ecc_strength_mt2701,
+ .ecc_regs = mt2701_ecc_regs,
.num_ecc_strength = 20,
- .encode_parity_reg0 = 0x10,
+ .ecc_mode_shift = 5,
+ .parity_bits = 14,
.pg_irq_sel = 0,
};
static const struct mtk_ecc_caps mtk_ecc_caps_mt2712 = {
.err_mask = 0x7f,
.ecc_strength = ecc_strength_mt2712,
+ .ecc_regs = mt2712_ecc_regs,
.num_ecc_strength = 23,
- .encode_parity_reg0 = 0x300,
+ .ecc_mode_shift = 5,
+ .parity_bits = 14,
.pg_irq_sel = 1,
};
+static const struct mtk_ecc_caps mtk_ecc_caps_mt7622 = {
+ .err_mask = 0x3f,
+ .ecc_strength = ecc_strength_mt7622,
+ .ecc_regs = mt7622_ecc_regs,
+ .num_ecc_strength = 7,
+ .ecc_mode_shift = 4,
+ .parity_bits = 13,
+ .pg_irq_sel = 0,
+};
+
static const struct of_device_id mtk_ecc_dt_match[] = {
{
.compatible = "mediatek,mt2701-ecc",
@@ -427,6 +488,9 @@ static const struct of_device_id mtk_ecc_dt_match[] = {
}, {
.compatible = "mediatek,mt2712-ecc",
.data = &mtk_ecc_caps_mt2712,
+ }, {
+ .compatible = "mediatek,mt7622-ecc",
+ .data = &mtk_ecc_caps_mt7622,
},
{},
};
@@ -452,7 +516,7 @@ static int mtk_ecc_probe(struct platform_device *pdev)
max_eccdata_size = ecc->caps->num_ecc_strength - 1;
max_eccdata_size = ecc->caps->ecc_strength[max_eccdata_size];
- max_eccdata_size = (max_eccdata_size * ECC_PARITY_BITS + 7) >> 3;
+ max_eccdata_size = (max_eccdata_size * ecc->caps->parity_bits + 7) >> 3;
max_eccdata_size = round_up(max_eccdata_size, 4);
ecc->eccdata = devm_kzalloc(dev, max_eccdata_size, GFP_KERNEL);
if (!ecc->eccdata)
generated by cgit (git 2.34.1) at 2024-05-05 07:21:28 +0000