[PATCH v2 0/7] mtd: rawnand: sunxi: Random cleanups + exec_op

[PATCH v2 0/7] mtd: rawnand: sunxi: Random cleanups + exec_op

[Boris Brezillon]

Hello,

This series converts the sunxi NAND controller driver to exec_op and
cleans a few things up.

Regards,

Boris

Changes in v2:
- Add patch 6 and 7 which were missing in v1

Boris Brezillon (7):
  mtd: rawnand: sunxi: Use a consistent name for sunxi_nand_chip objects
  mtd: rawnand: sunxi: Use struct_size()
  mtd: rawnand: sunxi: Name nand_chip objects consistently
  mtd: rawnand: sunxi: Stop passing mtd_info objects around
  mtd: rawnand: sunxi: Add an SPDX tag
  mtd: rawnand: sunxi: Migrate to ->exec_op()
  mtd: rawnand: sunxi: Fix kernel doc headers

 drivers/mtd/nand/raw/sunxi_nand.c | 714 ++++++++++++++++--------------
 1 file changed, 371 insertions(+), 343 deletions(-)

-- 
2.17.1

[PATCH v2 1/7] mtd: rawnand: sunxi: Use a consistent name for sunxi_nand_chip objects

[Boris Brezillon]

sunxi_nand_chip objects are sometimes called chip and other times
called sunxi_nand. Make that consistent and name all occurrences
sunxi_nand.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 56 ++++++++++++++++---------------
 1 file changed, 29 insertions(+), 27 deletions(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index a5c83cbe4897..9139fc003b1a 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1471,8 +1471,8 @@ static int _sunxi_nand_lookup_timing(const s32 *lut, int lut_size, u32 duration,
 static int sunxi_nfc_setup_data_interface(struct nand_chip *nand, int csline,
 					const struct nand_data_interface *conf)
 {
-	struct sunxi_nand_chip *chip = to_sunxi_nand(nand);
-	struct sunxi_nfc *nfc = to_sunxi_nfc(chip->nand.controller);
+	struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
+	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
 	const struct nand_sdr_timings *timings;
 	u32 min_clk_period = 0;
 	s32 tWB, tADL, tWHR, tRHW, tCAD;
@@ -1591,7 +1591,7 @@ static int sunxi_nfc_setup_data_interface(struct nand_chip *nand, int csline,
 	tCAD = 0x7;
 
 	/* TODO: A83 has some more bits for CDQSS, CS, CLHZ, CCS, WC */
-	chip->timing_cfg = NFC_TIMING_CFG(tWB, tADL, tWHR, tRHW, tCAD);
+	sunxi_nand->timing_cfg = NFC_TIMING_CFG(tWB, tADL, tWHR, tRHW, tCAD);
 
 	/* Convert min_clk_period from picoseconds to nanoseconds */
 	min_clk_period = DIV_ROUND_UP(min_clk_period, 1000);
@@ -1602,10 +1602,11 @@ static int sunxi_nfc_setup_data_interface(struct nand_chip *nand, int csline,
 	 * This new formula was verified with a scope and validated by
 	 * Allwinner engineers.
 	 */
-	chip->clk_rate = NSEC_PER_SEC / min_clk_period;
-	real_clk_rate = clk_round_rate(nfc->mod_clk, chip->clk_rate);
+	sunxi_nand->clk_rate = NSEC_PER_SEC / min_clk_period;
+	real_clk_rate = clk_round_rate(nfc->mod_clk, sunxi_nand->clk_rate);
 	if (real_clk_rate <= 0) {
-		dev_err(nfc->dev, "Unable to round clk %lu\n", chip->clk_rate);
+		dev_err(nfc->dev, "Unable to round clk %lu\n",
+			sunxi_nand->clk_rate);
 		return -EINVAL;
 	}
 
@@ -1615,8 +1616,8 @@ static int sunxi_nfc_setup_data_interface(struct nand_chip *nand, int csline,
 	 * 30 ns.
 	 */
 	min_clk_period = NSEC_PER_SEC / real_clk_rate;
-	chip->timing_ctl = ((min_clk_period * 2) < 30) ?
-			   NFC_TIMING_CTL_EDO : 0;
+	sunxi_nand->timing_ctl = ((min_clk_period * 2) < 30) ?
+				 NFC_TIMING_CTL_EDO : 0;
 
 	return 0;
 }
@@ -1853,7 +1854,7 @@ static const struct nand_controller_ops sunxi_nand_controller_ops = {
 static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
 				struct device_node *np)
 {
-	struct sunxi_nand_chip *chip;
+	struct sunxi_nand_chip *sunxi_nand;
 	struct mtd_info *mtd;
 	struct nand_chip *nand;
 	int nsels;
@@ -1870,17 +1871,17 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
 		return -EINVAL;
 	}
 
-	chip = devm_kzalloc(dev,
-			    sizeof(*chip) +
-			    (nsels * sizeof(struct sunxi_nand_chip_sel)),
-			    GFP_KERNEL);
-	if (!chip) {
+	sunxi_nand = devm_kzalloc(dev,
+				  sizeof(*sunxi_nand) +
+				  (nsels * sizeof(struct sunxi_nand_chip_sel)),
+				  GFP_KERNEL);
+	if (!sunxi_nand) {
 		dev_err(dev, "could not allocate chip\n");
 		return -ENOMEM;
 	}
 
-	chip->nsels = nsels;
-	chip->selected = -1;
+	sunxi_nand->nsels = nsels;
+	sunxi_nand->selected = -1;
 
 	for (i = 0; i < nsels; i++) {
 		ret = of_property_read_u32_index(np, "reg", i, &tmp);
@@ -1902,16 +1903,16 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
 			return -EINVAL;
 		}
 
-		chip->sels[i].cs = tmp;
+		sunxi_nand->sels[i].cs = tmp;
 
 		if (!of_property_read_u32_index(np, "allwinner,rb", i, &tmp) &&
 		    tmp < 2)
-			chip->sels[i].rb = tmp;
+			sunxi_nand->sels[i].rb = tmp;
 		else
-			chip->sels[i].rb = -1;
+			sunxi_nand->sels[i].rb = -1;
 	}
 
-	nand = &chip->nand;
+	nand = &sunxi_nand->nand;
 	/* Default tR value specified in the ONFI spec (chapter 4.15.1) */
 	nand->legacy.chip_delay = 200;
 	nand->controller = &nfc->controller;
@@ -1943,7 +1944,7 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
 		return ret;
 	}
 
-	list_add_tail(&chip->node, &nfc->chips);
+	list_add_tail(&sunxi_nand->node, &nfc->chips);
 
 	return 0;
 }
@@ -1973,14 +1974,15 @@ static int sunxi_nand_chips_init(struct device *dev, struct sunxi_nfc *nfc)
 
 static void sunxi_nand_chips_cleanup(struct sunxi_nfc *nfc)
 {
-	struct sunxi_nand_chip *chip;
+	struct sunxi_nand_chip *sunxi_nand;
 
 	while (!list_empty(&nfc->chips)) {
-		chip = list_first_entry(&nfc->chips, struct sunxi_nand_chip,
-					node);
-		nand_release(&chip->nand);
-		sunxi_nand_ecc_cleanup(&chip->nand.ecc);
-		list_del(&chip->node);
+		sunxi_nand = list_first_entry(&nfc->chips,
+					      struct sunxi_nand_chip,
+					      node);
+		nand_release(&sunxi_nand->nand);
+		sunxi_nand_ecc_cleanup(&sunxi_nand->nand.ecc);
+		list_del(&sunxi_nand->node);
 	}
 }
 
-- 
2.17.1

[PATCH v2 2/7] mtd: rawnand: sunxi: Use struct_size()

[Boris Brezillon]

Use struct_size() to calculate sunxi_nand object size.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 9139fc003b1a..1453392a53e7 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1871,9 +1871,7 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
 		return -EINVAL;
 	}
 
-	sunxi_nand = devm_kzalloc(dev,
-				  sizeof(*sunxi_nand) +
-				  (nsels * sizeof(struct sunxi_nand_chip_sel)),
+	sunxi_nand = devm_kzalloc(dev, struct_size(sunxi_nand, sels, nsels),
 				  GFP_KERNEL);
 	if (!sunxi_nand) {
 		dev_err(dev, "could not allocate chip\n");
-- 
2.17.1

[PATCH v2 3/7] mtd: rawnand: sunxi: Name nand_chip objects consistently

[Boris Brezillon]

nand_chip objects are sometimes called chip and sometimes nand. Rename
all of them into nand to make things consistent.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 103 +++++++++++++++---------------
 1 file changed, 51 insertions(+), 52 deletions(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 1453392a53e7..05820d9b3bd7 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1185,16 +1185,16 @@ static void sunxi_nfc_hw_ecc_write_extra_oob(struct mtd_info *mtd,
 		*cur_off = mtd->oobsize + mtd->writesize;
 }
 
-static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *chip, uint8_t *buf,
+static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *nand, uint8_t *buf,
 				      int oob_required, int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(chip);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
+	struct mtd_info *mtd = nand_to_mtd(nand);
+	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	unsigned int max_bitflips = 0;
 	int ret, i, cur_off = 0;
 	bool raw_mode = false;
 
-	nand_read_page_op(chip, page, 0, NULL, 0);
+	nand_read_page_op(nand, page, 0, NULL, 0);
 
 	sunxi_nfc_hw_ecc_enable(mtd);
 
@@ -1202,7 +1202,7 @@ static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *chip, uint8_t *buf,
 		int data_off = i * ecc->size;
 		int oob_off = i * (ecc->bytes + 4);
 		u8 *data = buf + data_off;
-		u8 *oob = chip->oob_poi + oob_off;
+		u8 *oob = nand->oob_poi + oob_off;
 
 		ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob,
 						  oob_off + mtd->writesize,
@@ -1215,7 +1215,7 @@ static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *chip, uint8_t *buf,
 	}
 
 	if (oob_required)
-		sunxi_nfc_hw_ecc_read_extra_oob(mtd, chip->oob_poi, &cur_off,
+		sunxi_nfc_hw_ecc_read_extra_oob(mtd, nand->oob_poi, &cur_off,
 						!raw_mode, page);
 
 	sunxi_nfc_hw_ecc_disable(mtd);
@@ -1223,33 +1223,33 @@ static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *chip, uint8_t *buf,
 	return max_bitflips;
 }
 
-static int sunxi_nfc_hw_ecc_read_page_dma(struct nand_chip *chip, u8 *buf,
+static int sunxi_nfc_hw_ecc_read_page_dma(struct nand_chip *nand, u8 *buf,
 					  int oob_required, int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(chip);
+	struct mtd_info *mtd = nand_to_mtd(nand);
 	int ret;
 
-	nand_read_page_op(chip, page, 0, NULL, 0);
+	nand_read_page_op(nand, page, 0, NULL, 0);
 
 	ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, oob_required, page,
-					       chip->ecc.steps);
+					       nand->ecc.steps);
 	if (ret >= 0)
 		return ret;
 
 	/* Fallback to PIO mode */
-	return sunxi_nfc_hw_ecc_read_page(chip, buf, oob_required, page);
+	return sunxi_nfc_hw_ecc_read_page(nand, buf, oob_required, page);
 }
 
-static int sunxi_nfc_hw_ecc_read_subpage(struct nand_chip *chip,
+static int sunxi_nfc_hw_ecc_read_subpage(struct nand_chip *nand,
 					 u32 data_offs, u32 readlen,
 					 u8 *bufpoi, int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(chip);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
+	struct mtd_info *mtd = nand_to_mtd(nand);
+	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	int ret, i, cur_off = 0;
 	unsigned int max_bitflips = 0;
 
-	nand_read_page_op(chip, page, 0, NULL, 0);
+	nand_read_page_op(nand, page, 0, NULL, 0);
 
 	sunxi_nfc_hw_ecc_enable(mtd);
 
@@ -1258,7 +1258,7 @@ static int sunxi_nfc_hw_ecc_read_subpage(struct nand_chip *chip,
 		int data_off = i * ecc->size;
 		int oob_off = i * (ecc->bytes + 4);
 		u8 *data = bufpoi + data_off;
-		u8 *oob = chip->oob_poi + oob_off;
+		u8 *oob = nand->oob_poi + oob_off;
 
 		ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off,
 						  oob,
@@ -1274,34 +1274,34 @@ static int sunxi_nfc_hw_ecc_read_subpage(struct nand_chip *chip,
 	return max_bitflips;
 }
 
-static int sunxi_nfc_hw_ecc_read_subpage_dma(struct nand_chip *chip,
+static int sunxi_nfc_hw_ecc_read_subpage_dma(struct nand_chip *nand,
 					     u32 data_offs, u32 readlen,
 					     u8 *buf, int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(chip);
-	int nchunks = DIV_ROUND_UP(data_offs + readlen, chip->ecc.size);
+	struct mtd_info *mtd = nand_to_mtd(nand);
+	int nchunks = DIV_ROUND_UP(data_offs + readlen, nand->ecc.size);
 	int ret;
 
-	nand_read_page_op(chip, page, 0, NULL, 0);
+	nand_read_page_op(nand, page, 0, NULL, 0);
 
 	ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, false, page, nchunks);
 	if (ret >= 0)
 		return ret;
 
 	/* Fallback to PIO mode */
-	return sunxi_nfc_hw_ecc_read_subpage(chip, data_offs, readlen,
+	return sunxi_nfc_hw_ecc_read_subpage(nand, data_offs, readlen,
 					     buf, page);
 }
 
-static int sunxi_nfc_hw_ecc_write_page(struct nand_chip *chip,
+static int sunxi_nfc_hw_ecc_write_page(struct nand_chip *nand,
 				       const uint8_t *buf, int oob_required,
 				       int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(chip);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
+	struct mtd_info *mtd = nand_to_mtd(nand);
+	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	int ret, i, cur_off = 0;
 
-	nand_prog_page_begin_op(chip, page, 0, NULL, 0);
+	nand_prog_page_begin_op(nand, page, 0, NULL, 0);
 
 	sunxi_nfc_hw_ecc_enable(mtd);
 
@@ -1309,7 +1309,7 @@ static int sunxi_nfc_hw_ecc_write_page(struct nand_chip *chip,
 		int data_off = i * ecc->size;
 		int oob_off = i * (ecc->bytes + 4);
 		const u8 *data = buf + data_off;
-		const u8 *oob = chip->oob_poi + oob_off;
+		const u8 *oob = nand->oob_poi + oob_off;
 
 		ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, oob,
 						   oob_off + mtd->writesize,
@@ -1318,25 +1318,25 @@ static int sunxi_nfc_hw_ecc_write_page(struct nand_chip *chip,
 			return ret;
 	}
 
-	if (oob_required || (chip->options & NAND_NEED_SCRAMBLING))
-		sunxi_nfc_hw_ecc_write_extra_oob(mtd, chip->oob_poi,
+	if (oob_required || (nand->options & NAND_NEED_SCRAMBLING))
+		sunxi_nfc_hw_ecc_write_extra_oob(mtd, nand->oob_poi,
 						 &cur_off, page);
 
 	sunxi_nfc_hw_ecc_disable(mtd);
 
-	return nand_prog_page_end_op(chip);
+	return nand_prog_page_end_op(nand);
 }
 
-static int sunxi_nfc_hw_ecc_write_subpage(struct nand_chip *chip,
+static int sunxi_nfc_hw_ecc_write_subpage(struct nand_chip *nand,
 					  u32 data_offs, u32 data_len,
 					  const u8 *buf, int oob_required,
 					  int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(chip);
-	struct nand_ecc_ctrl *ecc = &chip->ecc;
+	struct mtd_info *mtd = nand_to_mtd(nand);
+	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	int ret, i, cur_off = 0;
 
-	nand_prog_page_begin_op(chip, page, 0, NULL, 0);
+	nand_prog_page_begin_op(nand, page, 0, NULL, 0);
 
 	sunxi_nfc_hw_ecc_enable(mtd);
 
@@ -1345,7 +1345,7 @@ static int sunxi_nfc_hw_ecc_write_subpage(struct nand_chip *chip,
 		int data_off = i * ecc->size;
 		int oob_off = i * (ecc->bytes + 4);
 		const u8 *data = buf + data_off;
-		const u8 *oob = chip->oob_poi + oob_off;
+		const u8 *oob = nand->oob_poi + oob_off;
 
 		ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, oob,
 						   oob_off + mtd->writesize,
@@ -1356,16 +1356,15 @@ static int sunxi_nfc_hw_ecc_write_subpage(struct nand_chip *chip,
 
 	sunxi_nfc_hw_ecc_disable(mtd);
 
-	return nand_prog_page_end_op(chip);
+	return nand_prog_page_end_op(nand);
 }
 
-static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *chip,
+static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *nand,
 					   const u8 *buf,
 					   int oob_required,
 					   int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(chip);
-	struct nand_chip *nand = mtd_to_nand(mtd);
+	struct mtd_info *mtd = nand_to_mtd(nand);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	struct scatterlist sg;
@@ -1386,7 +1385,7 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *chip,
 		sunxi_nfc_hw_ecc_set_prot_oob_bytes(mtd, oob, i, !i, page);
 	}
 
-	nand_prog_page_begin_op(chip, page, 0, NULL, 0);
+	nand_prog_page_begin_op(nand, page, 0, NULL, 0);
 
 	sunxi_nfc_hw_ecc_enable(mtd);
 	sunxi_nfc_randomizer_config(mtd, page, false);
@@ -1413,38 +1412,38 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *chip,
 	if (ret)
 		return ret;
 
-	if (oob_required || (chip->options & NAND_NEED_SCRAMBLING))
+	if (oob_required || (nand->options & NAND_NEED_SCRAMBLING))
 		/* TODO: use DMA to transfer extra OOB bytes ? */
-		sunxi_nfc_hw_ecc_write_extra_oob(mtd, chip->oob_poi,
+		sunxi_nfc_hw_ecc_write_extra_oob(mtd, nand->oob_poi,
 						 NULL, page);
 
-	return nand_prog_page_end_op(chip);
+	return nand_prog_page_end_op(nand);
 
 pio_fallback:
-	return sunxi_nfc_hw_ecc_write_page(chip, buf, oob_required, page);
+	return sunxi_nfc_hw_ecc_write_page(nand, buf, oob_required, page);
 }
 
-static int sunxi_nfc_hw_ecc_read_oob(struct nand_chip *chip, int page)
+static int sunxi_nfc_hw_ecc_read_oob(struct nand_chip *nand, int page)
 {
-	chip->pagebuf = -1;
+	nand->pagebuf = -1;
 
-	return chip->ecc.read_page(chip, chip->data_buf, 1, page);
+	return nand->ecc.read_page(nand, nand->data_buf, 1, page);
 }
 
-static int sunxi_nfc_hw_ecc_write_oob(struct nand_chip *chip, int page)
+static int sunxi_nfc_hw_ecc_write_oob(struct nand_chip *nand, int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(chip);
+	struct mtd_info *mtd = nand_to_mtd(nand);
 	int ret;
 
-	chip->pagebuf = -1;
+	nand->pagebuf = -1;
 
-	memset(chip->data_buf, 0xff, mtd->writesize);
-	ret = chip->ecc.write_page(chip, chip->data_buf, 1, page);
+	memset(nand->data_buf, 0xff, mtd->writesize);
+	ret = nand->ecc.write_page(nand, nand->data_buf, 1, page);
 	if (ret)
 		return ret;
 
 	/* Send command to program the OOB data */
-	return nand_prog_page_end_op(chip);
+	return nand_prog_page_end_op(nand);
 }
 
 static const s32 tWB_lut[] = {6, 12, 16, 20};
-- 
2.17.1

[PATCH v2 4/7] mtd: rawnand: sunxi: Stop passing mtd_info objects around

[Boris Brezillon]

Replace them by nand_chip pointers.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 204 ++++++++++++++----------------
 1 file changed, 94 insertions(+), 110 deletions(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 05820d9b3bd7..fb02603ab227 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -339,13 +339,11 @@ static int sunxi_nfc_rst(struct sunxi_nfc *nfc)
 	return ret;
 }
 
-static int sunxi_nfc_dma_op_prepare(struct mtd_info *mtd, const void *buf,
+static int sunxi_nfc_dma_op_prepare(struct sunxi_nfc *nfc, const void *buf,
 				    int chunksize, int nchunks,
 				    enum dma_data_direction ddir,
 				    struct scatterlist *sg)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
-	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	struct dma_async_tx_descriptor *dmad;
 	enum dma_transfer_direction tdir;
 	dma_cookie_t dmat;
@@ -388,13 +386,10 @@ static int sunxi_nfc_dma_op_prepare(struct mtd_info *mtd, const void *buf,
 	return ret;
 }
 
-static void sunxi_nfc_dma_op_cleanup(struct mtd_info *mtd,
+static void sunxi_nfc_dma_op_cleanup(struct sunxi_nfc *nfc,
 				     enum dma_data_direction ddir,
 				     struct scatterlist *sg)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
-	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
-
 	dma_unmap_sg(nfc->dev, sg, 1, ddir);
 	writel(readl(nfc->regs + NFC_REG_CTL) & ~NFC_RAM_METHOD,
 	       nfc->regs + NFC_REG_CTL);
@@ -684,8 +679,10 @@ static u16 sunxi_nfc_randomizer_step(u16 state, int count)
 	return state;
 }
 
-static u16 sunxi_nfc_randomizer_state(struct mtd_info *mtd, int page, bool ecc)
+static u16 sunxi_nfc_randomizer_state(struct nand_chip *nand, int page,
+				      bool ecc)
 {
+	struct mtd_info *mtd = nand_to_mtd(nand);
 	const u16 *seeds = sunxi_nfc_randomizer_page_seeds;
 	int mod = mtd_div_by_ws(mtd->erasesize, mtd);
 
@@ -702,10 +699,9 @@ static u16 sunxi_nfc_randomizer_state(struct mtd_info *mtd, int page, bool ecc)
 	return seeds[page % mod];
 }
 
-static void sunxi_nfc_randomizer_config(struct mtd_info *mtd,
-					int page, bool ecc)
+static void sunxi_nfc_randomizer_config(struct nand_chip *nand, int page,
+					bool ecc)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	u32 ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);
 	u16 state;
@@ -714,14 +710,13 @@ static void sunxi_nfc_randomizer_config(struct mtd_info *mtd,
 		return;
 
 	ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);
-	state = sunxi_nfc_randomizer_state(mtd, page, ecc);
+	state = sunxi_nfc_randomizer_state(nand, page, ecc);
 	ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_RANDOM_SEED_MSK;
 	writel(ecc_ctl | NFC_RANDOM_SEED(state), nfc->regs + NFC_REG_ECC_CTL);
 }
 
-static void sunxi_nfc_randomizer_enable(struct mtd_info *mtd)
+static void sunxi_nfc_randomizer_enable(struct nand_chip *nand)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 
 	if (!(nand->options & NAND_NEED_SCRAMBLING))
@@ -731,9 +726,8 @@ static void sunxi_nfc_randomizer_enable(struct mtd_info *mtd)
 	       nfc->regs + NFC_REG_ECC_CTL);
 }
 
-static void sunxi_nfc_randomizer_disable(struct mtd_info *mtd)
+static void sunxi_nfc_randomizer_disable(struct nand_chip *nand)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 
 	if (!(nand->options & NAND_NEED_SCRAMBLING))
@@ -743,36 +737,35 @@ static void sunxi_nfc_randomizer_disable(struct mtd_info *mtd)
 	       nfc->regs + NFC_REG_ECC_CTL);
 }
 
-static void sunxi_nfc_randomize_bbm(struct mtd_info *mtd, int page, u8 *bbm)
+static void sunxi_nfc_randomize_bbm(struct nand_chip *nand, int page, u8 *bbm)
 {
-	u16 state = sunxi_nfc_randomizer_state(mtd, page, true);
+	u16 state = sunxi_nfc_randomizer_state(nand, page, true);
 
 	bbm[0] ^= state;
 	bbm[1] ^= sunxi_nfc_randomizer_step(state, 8);
 }
 
-static void sunxi_nfc_randomizer_write_buf(struct mtd_info *mtd,
+static void sunxi_nfc_randomizer_write_buf(struct nand_chip *nand,
 					   const uint8_t *buf, int len,
 					   bool ecc, int page)
 {
-	sunxi_nfc_randomizer_config(mtd, page, ecc);
-	sunxi_nfc_randomizer_enable(mtd);
-	sunxi_nfc_write_buf(mtd_to_nand(mtd), buf, len);
-	sunxi_nfc_randomizer_disable(mtd);
+	sunxi_nfc_randomizer_config(nand, page, ecc);
+	sunxi_nfc_randomizer_enable(nand);
+	sunxi_nfc_write_buf(nand, buf, len);
+	sunxi_nfc_randomizer_disable(nand);
 }
 
-static void sunxi_nfc_randomizer_read_buf(struct mtd_info *mtd, uint8_t *buf,
+static void sunxi_nfc_randomizer_read_buf(struct nand_chip *nand, uint8_t *buf,
 					  int len, bool ecc, int page)
 {
-	sunxi_nfc_randomizer_config(mtd, page, ecc);
-	sunxi_nfc_randomizer_enable(mtd);
-	sunxi_nfc_read_buf(mtd_to_nand(mtd), buf, len);
-	sunxi_nfc_randomizer_disable(mtd);
+	sunxi_nfc_randomizer_config(nand, page, ecc);
+	sunxi_nfc_randomizer_enable(nand);
+	sunxi_nfc_read_buf(nand, buf, len);
+	sunxi_nfc_randomizer_disable(nand);
 }
 
-static void sunxi_nfc_hw_ecc_enable(struct mtd_info *mtd)
+static void sunxi_nfc_hw_ecc_enable(struct nand_chip *nand)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	struct sunxi_nand_hw_ecc *data = nand->ecc.priv;
 	u32 ecc_ctl;
@@ -789,9 +782,8 @@ static void sunxi_nfc_hw_ecc_enable(struct mtd_info *mtd)
 	writel(ecc_ctl, nfc->regs + NFC_REG_ECC_CTL);
 }
 
-static void sunxi_nfc_hw_ecc_disable(struct mtd_info *mtd)
+static void sunxi_nfc_hw_ecc_disable(struct nand_chip *nand)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 
 	writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_ECC_EN,
@@ -811,10 +803,9 @@ static inline u32 sunxi_nfc_buf_to_user_data(const u8 *buf)
 	return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
 }
 
-static void sunxi_nfc_hw_ecc_get_prot_oob_bytes(struct mtd_info *mtd, u8 *oob,
+static void sunxi_nfc_hw_ecc_get_prot_oob_bytes(struct nand_chip *nand, u8 *oob,
 						int step, bool bbm, int page)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 
 	sunxi_nfc_user_data_to_buf(readl(nfc->regs + NFC_REG_USER_DATA(step)),
@@ -822,21 +813,20 @@ static void sunxi_nfc_hw_ecc_get_prot_oob_bytes(struct mtd_info *mtd, u8 *oob,
 
 	/* De-randomize the Bad Block Marker. */
 	if (bbm && (nand->options & NAND_NEED_SCRAMBLING))
-		sunxi_nfc_randomize_bbm(mtd, page, oob);
+		sunxi_nfc_randomize_bbm(nand, page, oob);
 }
 
-static void sunxi_nfc_hw_ecc_set_prot_oob_bytes(struct mtd_info *mtd,
+static void sunxi_nfc_hw_ecc_set_prot_oob_bytes(struct nand_chip *nand,
 						const u8 *oob, int step,
 						bool bbm, int page)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	u8 user_data[4];
 
 	/* Randomize the Bad Block Marker. */
 	if (bbm && (nand->options & NAND_NEED_SCRAMBLING)) {
 		memcpy(user_data, oob, sizeof(user_data));
-		sunxi_nfc_randomize_bbm(mtd, page, user_data);
+		sunxi_nfc_randomize_bbm(nand, page, user_data);
 		oob = user_data;
 	}
 
@@ -844,9 +834,11 @@ static void sunxi_nfc_hw_ecc_set_prot_oob_bytes(struct mtd_info *mtd,
 	       nfc->regs + NFC_REG_USER_DATA(step));
 }
 
-static void sunxi_nfc_hw_ecc_update_stats(struct mtd_info *mtd,
+static void sunxi_nfc_hw_ecc_update_stats(struct nand_chip *nand,
 					  unsigned int *max_bitflips, int ret)
 {
+	struct mtd_info *mtd = nand_to_mtd(nand);
+
 	if (ret < 0) {
 		mtd->ecc_stats.failed++;
 	} else {
@@ -855,10 +847,9 @@ static void sunxi_nfc_hw_ecc_update_stats(struct mtd_info *mtd,
 	}
 }
 
-static int sunxi_nfc_hw_ecc_correct(struct mtd_info *mtd, u8 *data, u8 *oob,
+static int sunxi_nfc_hw_ecc_correct(struct nand_chip *nand, u8 *data, u8 *oob,
 				    int step, u32 status, bool *erased)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	u32 tmp;
@@ -892,14 +883,13 @@ static int sunxi_nfc_hw_ecc_correct(struct mtd_info *mtd, u8 *data, u8 *oob,
 	return NFC_ECC_ERR_CNT(step, tmp);
 }
 
-static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd,
+static int sunxi_nfc_hw_ecc_read_chunk(struct nand_chip *nand,
 				       u8 *data, int data_off,
 				       u8 *oob, int oob_off,
 				       int *cur_off,
 				       unsigned int *max_bitflips,
 				       bool bbm, bool oob_required, int page)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	int raw_mode = 0;
@@ -909,7 +899,7 @@ static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd,
 	if (*cur_off != data_off)
 		nand_change_read_column_op(nand, data_off, NULL, 0, false);
 
-	sunxi_nfc_randomizer_read_buf(mtd, NULL, ecc->size, false, page);
+	sunxi_nfc_randomizer_read_buf(nand, NULL, ecc->size, false, page);
 
 	if (data_off + ecc->size != oob_off)
 		nand_change_read_column_op(nand, oob_off, NULL, 0, false);
@@ -918,18 +908,18 @@ static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd,
 	if (ret)
 		return ret;
 
-	sunxi_nfc_randomizer_enable(mtd);
+	sunxi_nfc_randomizer_enable(nand);
 	writel(NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | NFC_ECC_OP,
 	       nfc->regs + NFC_REG_CMD);
 
 	ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
-	sunxi_nfc_randomizer_disable(mtd);
+	sunxi_nfc_randomizer_disable(nand);
 	if (ret)
 		return ret;
 
 	*cur_off = oob_off + ecc->bytes + 4;
 
-	ret = sunxi_nfc_hw_ecc_correct(mtd, data, oob_required ? oob : NULL, 0,
+	ret = sunxi_nfc_hw_ecc_correct(nand, data, oob_required ? oob : NULL, 0,
 				       readl(nfc->regs + NFC_REG_ECC_ST),
 				       &erased);
 	if (erased)
@@ -961,24 +951,24 @@ static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd,
 		if (oob_required) {
 			nand_change_read_column_op(nand, oob_off, NULL, 0,
 						   false);
-			sunxi_nfc_randomizer_read_buf(mtd, oob, ecc->bytes + 4,
+			sunxi_nfc_randomizer_read_buf(nand, oob, ecc->bytes + 4,
 						      true, page);
 
-			sunxi_nfc_hw_ecc_get_prot_oob_bytes(mtd, oob, 0,
+			sunxi_nfc_hw_ecc_get_prot_oob_bytes(nand, oob, 0,
 							    bbm, page);
 		}
 	}
 
-	sunxi_nfc_hw_ecc_update_stats(mtd, max_bitflips, ret);
+	sunxi_nfc_hw_ecc_update_stats(nand, max_bitflips, ret);
 
 	return raw_mode;
 }
 
-static void sunxi_nfc_hw_ecc_read_extra_oob(struct mtd_info *mtd,
+static void sunxi_nfc_hw_ecc_read_extra_oob(struct nand_chip *nand,
 					    u8 *oob, int *cur_off,
 					    bool randomize, int page)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
+	struct mtd_info *mtd = nand_to_mtd(nand);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	int offset = ((ecc->bytes + 4) * ecc->steps);
 	int len = mtd->oobsize - offset;
@@ -993,20 +983,20 @@ static void sunxi_nfc_hw_ecc_read_extra_oob(struct mtd_info *mtd,
 	if (!randomize)
 		sunxi_nfc_read_buf(nand, oob + offset, len);
 	else
-		sunxi_nfc_randomizer_read_buf(mtd, oob + offset, len,
+		sunxi_nfc_randomizer_read_buf(nand, oob + offset, len,
 					      false, page);
 
 	if (cur_off)
 		*cur_off = mtd->oobsize + mtd->writesize;
 }
 
-static int sunxi_nfc_hw_ecc_read_chunks_dma(struct mtd_info *mtd, uint8_t *buf,
+static int sunxi_nfc_hw_ecc_read_chunks_dma(struct nand_chip *nand, uint8_t *buf,
 					    int oob_required, int page,
 					    int nchunks)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	bool randomized = nand->options & NAND_NEED_SCRAMBLING;
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+	struct mtd_info *mtd = nand_to_mtd(nand);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	unsigned int max_bitflips = 0;
 	int ret, i, raw_mode = 0;
@@ -1017,14 +1007,14 @@ static int sunxi_nfc_hw_ecc_read_chunks_dma(struct mtd_info *mtd, uint8_t *buf,
 	if (ret)
 		return ret;
 
-	ret = sunxi_nfc_dma_op_prepare(mtd, buf, ecc->size, nchunks,
+	ret = sunxi_nfc_dma_op_prepare(nfc, buf, ecc->size, nchunks,
 				       DMA_FROM_DEVICE, &sg);
 	if (ret)
 		return ret;
 
-	sunxi_nfc_hw_ecc_enable(mtd);
-	sunxi_nfc_randomizer_config(mtd, page, false);
-	sunxi_nfc_randomizer_enable(mtd);
+	sunxi_nfc_hw_ecc_enable(nand);
+	sunxi_nfc_randomizer_config(nand, page, false);
+	sunxi_nfc_randomizer_enable(nand);
 
 	writel((NAND_CMD_RNDOUTSTART << 16) | (NAND_CMD_RNDOUT << 8) |
 	       NAND_CMD_READSTART, nfc->regs + NFC_REG_RCMD_SET);
@@ -1038,10 +1028,10 @@ static int sunxi_nfc_hw_ecc_read_chunks_dma(struct mtd_info *mtd, uint8_t *buf,
 	if (ret)
 		dmaengine_terminate_all(nfc->dmac);
 
-	sunxi_nfc_randomizer_disable(mtd);
-	sunxi_nfc_hw_ecc_disable(mtd);
+	sunxi_nfc_randomizer_disable(nand);
+	sunxi_nfc_hw_ecc_disable(nand);
 
-	sunxi_nfc_dma_op_cleanup(mtd, DMA_FROM_DEVICE, &sg);
+	sunxi_nfc_dma_op_cleanup(nfc, DMA_FROM_DEVICE, &sg);
 
 	if (ret)
 		return ret;
@@ -1055,7 +1045,7 @@ static int sunxi_nfc_hw_ecc_read_chunks_dma(struct mtd_info *mtd, uint8_t *buf,
 		u8 *oob = nand->oob_poi + oob_off;
 		bool erased;
 
-		ret = sunxi_nfc_hw_ecc_correct(mtd, randomized ? data : NULL,
+		ret = sunxi_nfc_hw_ecc_correct(nand, randomized ? data : NULL,
 					       oob_required ? oob : NULL,
 					       i, status, &erased);
 
@@ -1069,14 +1059,14 @@ static int sunxi_nfc_hw_ecc_read_chunks_dma(struct mtd_info *mtd, uint8_t *buf,
 						   mtd->writesize + oob_off,
 						   oob, ecc->bytes + 4, false);
 
-			sunxi_nfc_hw_ecc_get_prot_oob_bytes(mtd, oob, i,
+			sunxi_nfc_hw_ecc_get_prot_oob_bytes(nand, oob, i,
 							    !i, page);
 		}
 
 		if (erased)
 			raw_mode = 1;
 
-		sunxi_nfc_hw_ecc_update_stats(mtd, &max_bitflips, ret);
+		sunxi_nfc_hw_ecc_update_stats(nand, &max_bitflips, ret);
 	}
 
 	if (status & NFC_ECC_ERR_MSK) {
@@ -1111,25 +1101,24 @@ static int sunxi_nfc_hw_ecc_read_chunks_dma(struct mtd_info *mtd, uint8_t *buf,
 			if (ret >= 0)
 				raw_mode = 1;
 
-			sunxi_nfc_hw_ecc_update_stats(mtd, &max_bitflips, ret);
+			sunxi_nfc_hw_ecc_update_stats(nand, &max_bitflips, ret);
 		}
 	}
 
 	if (oob_required)
-		sunxi_nfc_hw_ecc_read_extra_oob(mtd, nand->oob_poi,
+		sunxi_nfc_hw_ecc_read_extra_oob(nand, nand->oob_poi,
 						NULL, !raw_mode,
 						page);
 
 	return max_bitflips;
 }
 
-static int sunxi_nfc_hw_ecc_write_chunk(struct mtd_info *mtd,
+static int sunxi_nfc_hw_ecc_write_chunk(struct nand_chip *nand,
 					const u8 *data, int data_off,
 					const u8 *oob, int oob_off,
 					int *cur_off, bool bbm,
 					int page)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	int ret;
@@ -1137,7 +1126,7 @@ static int sunxi_nfc_hw_ecc_write_chunk(struct mtd_info *mtd,
 	if (data_off != *cur_off)
 		nand_change_write_column_op(nand, data_off, NULL, 0, false);
 
-	sunxi_nfc_randomizer_write_buf(mtd, data, ecc->size, false, page);
+	sunxi_nfc_randomizer_write_buf(nand, data, ecc->size, false, page);
 
 	if (data_off + ecc->size != oob_off)
 		nand_change_write_column_op(nand, oob_off, NULL, 0, false);
@@ -1146,15 +1135,15 @@ static int sunxi_nfc_hw_ecc_write_chunk(struct mtd_info *mtd,
 	if (ret)
 		return ret;
 
-	sunxi_nfc_randomizer_enable(mtd);
-	sunxi_nfc_hw_ecc_set_prot_oob_bytes(mtd, oob, 0, bbm, page);
+	sunxi_nfc_randomizer_enable(nand);
+	sunxi_nfc_hw_ecc_set_prot_oob_bytes(nand, oob, 0, bbm, page);
 
 	writel(NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD |
 	       NFC_ACCESS_DIR | NFC_ECC_OP,
 	       nfc->regs + NFC_REG_CMD);
 
 	ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
-	sunxi_nfc_randomizer_disable(mtd);
+	sunxi_nfc_randomizer_disable(nand);
 	if (ret)
 		return ret;
 
@@ -1163,11 +1152,11 @@ static int sunxi_nfc_hw_ecc_write_chunk(struct mtd_info *mtd,
 	return 0;
 }
 
-static void sunxi_nfc_hw_ecc_write_extra_oob(struct mtd_info *mtd,
+static void sunxi_nfc_hw_ecc_write_extra_oob(struct nand_chip *nand,
 					     u8 *oob, int *cur_off,
 					     int page)
 {
-	struct nand_chip *nand = mtd_to_nand(mtd);
+	struct mtd_info *mtd = nand_to_mtd(nand);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	int offset = ((ecc->bytes + 4) * ecc->steps);
 	int len = mtd->oobsize - offset;
@@ -1179,7 +1168,7 @@ static void sunxi_nfc_hw_ecc_write_extra_oob(struct mtd_info *mtd,
 		nand_change_write_column_op(nand, offset + mtd->writesize,
 					    NULL, 0, false);
 
-	sunxi_nfc_randomizer_write_buf(mtd, oob + offset, len, false, page);
+	sunxi_nfc_randomizer_write_buf(nand, oob + offset, len, false, page);
 
 	if (cur_off)
 		*cur_off = mtd->oobsize + mtd->writesize;
@@ -1196,7 +1185,7 @@ static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *nand, uint8_t *buf,
 
 	nand_read_page_op(nand, page, 0, NULL, 0);
 
-	sunxi_nfc_hw_ecc_enable(mtd);
+	sunxi_nfc_hw_ecc_enable(nand);
 
 	for (i = 0; i < ecc->steps; i++) {
 		int data_off = i * ecc->size;
@@ -1204,7 +1193,7 @@ static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *nand, uint8_t *buf,
 		u8 *data = buf + data_off;
 		u8 *oob = nand->oob_poi + oob_off;
 
-		ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob,
+		ret = sunxi_nfc_hw_ecc_read_chunk(nand, data, data_off, oob,
 						  oob_off + mtd->writesize,
 						  &cur_off, &max_bitflips,
 						  !i, oob_required, page);
@@ -1215,10 +1204,10 @@ static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *nand, uint8_t *buf,
 	}
 
 	if (oob_required)
-		sunxi_nfc_hw_ecc_read_extra_oob(mtd, nand->oob_poi, &cur_off,
+		sunxi_nfc_hw_ecc_read_extra_oob(nand, nand->oob_poi, &cur_off,
 						!raw_mode, page);
 
-	sunxi_nfc_hw_ecc_disable(mtd);
+	sunxi_nfc_hw_ecc_disable(nand);
 
 	return max_bitflips;
 }
@@ -1226,12 +1215,11 @@ static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *nand, uint8_t *buf,
 static int sunxi_nfc_hw_ecc_read_page_dma(struct nand_chip *nand, u8 *buf,
 					  int oob_required, int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(nand);
 	int ret;
 
 	nand_read_page_op(nand, page, 0, NULL, 0);
 
-	ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, oob_required, page,
+	ret = sunxi_nfc_hw_ecc_read_chunks_dma(nand, buf, oob_required, page,
 					       nand->ecc.steps);
 	if (ret >= 0)
 		return ret;
@@ -1251,7 +1239,7 @@ static int sunxi_nfc_hw_ecc_read_subpage(struct nand_chip *nand,
 
 	nand_read_page_op(nand, page, 0, NULL, 0);
 
-	sunxi_nfc_hw_ecc_enable(mtd);
+	sunxi_nfc_hw_ecc_enable(nand);
 
 	for (i = data_offs / ecc->size;
 	     i < DIV_ROUND_UP(data_offs + readlen, ecc->size); i++) {
@@ -1260,7 +1248,7 @@ static int sunxi_nfc_hw_ecc_read_subpage(struct nand_chip *nand,
 		u8 *data = bufpoi + data_off;
 		u8 *oob = nand->oob_poi + oob_off;
 
-		ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off,
+		ret = sunxi_nfc_hw_ecc_read_chunk(nand, data, data_off,
 						  oob,
 						  oob_off + mtd->writesize,
 						  &cur_off, &max_bitflips, !i,
@@ -1269,7 +1257,7 @@ static int sunxi_nfc_hw_ecc_read_subpage(struct nand_chip *nand,
 			return ret;
 	}
 
-	sunxi_nfc_hw_ecc_disable(mtd);
+	sunxi_nfc_hw_ecc_disable(nand);
 
 	return max_bitflips;
 }
@@ -1278,13 +1266,12 @@ static int sunxi_nfc_hw_ecc_read_subpage_dma(struct nand_chip *nand,
 					     u32 data_offs, u32 readlen,
 					     u8 *buf, int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(nand);
 	int nchunks = DIV_ROUND_UP(data_offs + readlen, nand->ecc.size);
 	int ret;
 
 	nand_read_page_op(nand, page, 0, NULL, 0);
 
-	ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, false, page, nchunks);
+	ret = sunxi_nfc_hw_ecc_read_chunks_dma(nand, buf, false, page, nchunks);
 	if (ret >= 0)
 		return ret;
 
@@ -1303,7 +1290,7 @@ static int sunxi_nfc_hw_ecc_write_page(struct nand_chip *nand,
 
 	nand_prog_page_begin_op(nand, page, 0, NULL, 0);
 
-	sunxi_nfc_hw_ecc_enable(mtd);
+	sunxi_nfc_hw_ecc_enable(nand);
 
 	for (i = 0; i < ecc->steps; i++) {
 		int data_off = i * ecc->size;
@@ -1311,7 +1298,7 @@ static int sunxi_nfc_hw_ecc_write_page(struct nand_chip *nand,
 		const u8 *data = buf + data_off;
 		const u8 *oob = nand->oob_poi + oob_off;
 
-		ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, oob,
+		ret = sunxi_nfc_hw_ecc_write_chunk(nand, data, data_off, oob,
 						   oob_off + mtd->writesize,
 						   &cur_off, !i, page);
 		if (ret)
@@ -1319,10 +1306,10 @@ static int sunxi_nfc_hw_ecc_write_page(struct nand_chip *nand,
 	}
 
 	if (oob_required || (nand->options & NAND_NEED_SCRAMBLING))
-		sunxi_nfc_hw_ecc_write_extra_oob(mtd, nand->oob_poi,
+		sunxi_nfc_hw_ecc_write_extra_oob(nand, nand->oob_poi,
 						 &cur_off, page);
 
-	sunxi_nfc_hw_ecc_disable(mtd);
+	sunxi_nfc_hw_ecc_disable(nand);
 
 	return nand_prog_page_end_op(nand);
 }
@@ -1338,7 +1325,7 @@ static int sunxi_nfc_hw_ecc_write_subpage(struct nand_chip *nand,
 
 	nand_prog_page_begin_op(nand, page, 0, NULL, 0);
 
-	sunxi_nfc_hw_ecc_enable(mtd);
+	sunxi_nfc_hw_ecc_enable(nand);
 
 	for (i = data_offs / ecc->size;
 	     i < DIV_ROUND_UP(data_offs + data_len, ecc->size); i++) {
@@ -1347,14 +1334,14 @@ static int sunxi_nfc_hw_ecc_write_subpage(struct nand_chip *nand,
 		const u8 *data = buf + data_off;
 		const u8 *oob = nand->oob_poi + oob_off;
 
-		ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, oob,
+		ret = sunxi_nfc_hw_ecc_write_chunk(nand, data, data_off, oob,
 						   oob_off + mtd->writesize,
 						   &cur_off, !i, page);
 		if (ret)
 			return ret;
 	}
 
-	sunxi_nfc_hw_ecc_disable(mtd);
+	sunxi_nfc_hw_ecc_disable(nand);
 
 	return nand_prog_page_end_op(nand);
 }
@@ -1364,7 +1351,6 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *nand,
 					   int oob_required,
 					   int page)
 {
-	struct mtd_info *mtd = nand_to_mtd(nand);
 	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	struct scatterlist sg;
@@ -1374,7 +1360,7 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *nand,
 	if (ret)
 		return ret;
 
-	ret = sunxi_nfc_dma_op_prepare(mtd, buf, ecc->size, ecc->steps,
+	ret = sunxi_nfc_dma_op_prepare(nfc, buf, ecc->size, ecc->steps,
 				       DMA_TO_DEVICE, &sg);
 	if (ret)
 		goto pio_fallback;
@@ -1382,14 +1368,14 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *nand,
 	for (i = 0; i < ecc->steps; i++) {
 		const u8 *oob = nand->oob_poi + (i * (ecc->bytes + 4));
 
-		sunxi_nfc_hw_ecc_set_prot_oob_bytes(mtd, oob, i, !i, page);
+		sunxi_nfc_hw_ecc_set_prot_oob_bytes(nand, oob, i, !i, page);
 	}
 
 	nand_prog_page_begin_op(nand, page, 0, NULL, 0);
 
-	sunxi_nfc_hw_ecc_enable(mtd);
-	sunxi_nfc_randomizer_config(mtd, page, false);
-	sunxi_nfc_randomizer_enable(mtd);
+	sunxi_nfc_hw_ecc_enable(nand);
+	sunxi_nfc_randomizer_config(nand, page, false);
+	sunxi_nfc_randomizer_enable(nand);
 
 	writel((NAND_CMD_RNDIN << 8) | NAND_CMD_PAGEPROG,
 	       nfc->regs + NFC_REG_RCMD_SET);
@@ -1404,17 +1390,17 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *nand,
 	if (ret)
 		dmaengine_terminate_all(nfc->dmac);
 
-	sunxi_nfc_randomizer_disable(mtd);
-	sunxi_nfc_hw_ecc_disable(mtd);
+	sunxi_nfc_randomizer_disable(nand);
+	sunxi_nfc_hw_ecc_disable(nand);
 
-	sunxi_nfc_dma_op_cleanup(mtd, DMA_TO_DEVICE, &sg);
+	sunxi_nfc_dma_op_cleanup(nfc, DMA_TO_DEVICE, &sg);
 
 	if (ret)
 		return ret;
 
 	if (oob_required || (nand->options & NAND_NEED_SCRAMBLING))
 		/* TODO: use DMA to transfer extra OOB bytes ? */
-		sunxi_nfc_hw_ecc_write_extra_oob(mtd, nand->oob_poi,
+		sunxi_nfc_hw_ecc_write_extra_oob(nand, nand->oob_poi,
 						 NULL, page);
 
 	return nand_prog_page_end_op(nand);
@@ -1677,14 +1663,13 @@ static void sunxi_nand_hw_ecc_ctrl_cleanup(struct nand_ecc_ctrl *ecc)
 	kfree(ecc->priv);
 }
 
-static int sunxi_nand_hw_ecc_ctrl_init(struct mtd_info *mtd,
+static int sunxi_nand_hw_ecc_ctrl_init(struct nand_chip *nand,
 				       struct nand_ecc_ctrl *ecc,
 				       struct device_node *np)
 {
 	static const u8 strengths[] = { 16, 24, 28, 32, 40, 48, 56, 60, 64 };
-	struct nand_chip *nand = mtd_to_nand(mtd);
-	struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
-	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
+	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+	struct mtd_info *mtd = nand_to_mtd(nand);
 	struct sunxi_nand_hw_ecc *data;
 	int nsectors;
 	int ret;
@@ -1808,7 +1793,6 @@ static void sunxi_nand_ecc_cleanup(struct nand_ecc_ctrl *ecc)
 
 static int sunxi_nand_attach_chip(struct nand_chip *nand)
 {
-	struct mtd_info *mtd = nand_to_mtd(nand);
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	struct device_node *np = nand_get_flash_node(nand);
 	int ret;
@@ -1831,7 +1815,7 @@ static int sunxi_nand_attach_chip(struct nand_chip *nand)
 
 	switch (ecc->mode) {
 	case NAND_ECC_HW:
-		ret = sunxi_nand_hw_ecc_ctrl_init(mtd, ecc, np);
+		ret = sunxi_nand_hw_ecc_ctrl_init(nand, ecc, np);
 		if (ret)
 			return ret;
 		break;
-- 
2.17.1

[PATCH v2 5/7] mtd: rawnand: sunxi: Add an SPDX tag

[Boris Brezillon]

Replace the license text by an SPDX tag and fix MODULE_LICENSE() to
match GPL-2.0+.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index fb02603ab227..9b09c7083d76 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2013 Boris BREZILLON <b.brezillon.dev@gmail.com>
  *
@@ -10,16 +11,6 @@
  *
  *	Copyright (C) 2013 Dmitriy B. <rzk333@gmail.com>
  *	Copyright (C) 2013 Sergey Lapin <slapin@ossfans.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/dma-mapping.h>
@@ -2107,7 +2098,7 @@ static struct platform_driver sunxi_nfc_driver = {
 };
 module_platform_driver(sunxi_nfc_driver);
 
-MODULE_LICENSE("GPL v2");
+MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Boris BREZILLON");
 MODULE_DESCRIPTION("Allwinner NAND Flash Controller driver");
 MODULE_ALIAS("platform:sunxi_nand");
-- 
2.17.1

[PATCH v2 6/7] mtd: rawnand: sunxi: Migrate to ->exec_op()

[Boris Brezillon]

And get rif of all legacy hooks and unused fields.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 294 ++++++++++++++++++------------
 1 file changed, 174 insertions(+), 120 deletions(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 9b09c7083d76..d6b07067ed26 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -183,7 +183,6 @@ struct sunxi_nand_hw_ecc {
  * @mtd:		base MTD structure
  * @clk_rate:		clk_rate required for this NAND chip
  * @timing_cfg		TIMING_CFG register value for this NAND chip
- * @selected:		current active CS
  * @nsels:		number of CS lines required by the NAND chip
  * @sels:		array of CS lines descriptions
  */
@@ -193,11 +192,6 @@ struct sunxi_nand_chip {
 	unsigned long clk_rate;
 	u32 timing_cfg;
 	u32 timing_ctl;
-	int selected;
-	int addr_cycles;
-	u32 addr[2];
-	int cmd_cycles;
-	u8 cmd[2];
 	int nsels;
 	struct sunxi_nand_chip_sel sels[0];
 };
@@ -386,26 +380,7 @@ static void sunxi_nfc_dma_op_cleanup(struct sunxi_nfc *nfc,
 	       nfc->regs + NFC_REG_CTL);
 }
 
-static int sunxi_nfc_dev_ready(struct nand_chip *nand)
-{
-	struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
-	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
-	u32 mask;
-
-	if (sunxi_nand->selected < 0)
-		return 0;
-
-	if (sunxi_nand->sels[sunxi_nand->selected].rb < 0) {
-		dev_err(nfc->dev, "cannot check R/B NAND status!\n");
-		return 0;
-	}
-
-	mask = NFC_RB_STATE(sunxi_nand->sels[sunxi_nand->selected].rb);
-
-	return !!(readl(nfc->regs + NFC_REG_ST) & mask);
-}
-
-static void sunxi_nfc_select_chip(struct nand_chip *nand, int chip)
+static void sunxi_nfc_select_chip(struct nand_chip *nand, unsigned int cs)
 {
 	struct mtd_info *mtd = nand_to_mtd(nand);
 	struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
@@ -413,40 +388,27 @@ static void sunxi_nfc_select_chip(struct nand_chip *nand, int chip)
 	struct sunxi_nand_chip_sel *sel;
 	u32 ctl;
 
-	if (chip > 0 && chip >= sunxi_nand->nsels)
-		return;
-
-	if (chip == sunxi_nand->selected)
+	if (cs > 0 && cs >= sunxi_nand->nsels)
 		return;
 
 	ctl = readl(nfc->regs + NFC_REG_CTL) &
 	      ~(NFC_PAGE_SHIFT_MSK | NFC_CE_SEL_MSK | NFC_RB_SEL_MSK | NFC_EN);
 
-	if (chip >= 0) {
-		sel = &sunxi_nand->sels[chip];
+	sel = &sunxi_nand->sels[cs];
+	ctl |= NFC_CE_SEL(sel->cs) | NFC_EN | NFC_PAGE_SHIFT(nand->page_shift);
+	if (sel->rb >= 0)
+		ctl |= NFC_RB_SEL(sel->rb);
 
-		ctl |= NFC_CE_SEL(sel->cs) | NFC_EN |
-		       NFC_PAGE_SHIFT(nand->page_shift);
-		if (sel->rb < 0) {
-			nand->legacy.dev_ready = NULL;
-		} else {
-			nand->legacy.dev_ready = sunxi_nfc_dev_ready;
-			ctl |= NFC_RB_SEL(sel->rb);
-		}
+	writel(mtd->writesize, nfc->regs + NFC_REG_SPARE_AREA);
 
-		writel(mtd->writesize, nfc->regs + NFC_REG_SPARE_AREA);
-
-		if (nfc->clk_rate != sunxi_nand->clk_rate) {
-			clk_set_rate(nfc->mod_clk, sunxi_nand->clk_rate);
-			nfc->clk_rate = sunxi_nand->clk_rate;
-		}
+	if (nfc->clk_rate != sunxi_nand->clk_rate) {
+		clk_set_rate(nfc->mod_clk, sunxi_nand->clk_rate);
+		nfc->clk_rate = sunxi_nand->clk_rate;
 	}
 
 	writel(sunxi_nand->timing_ctl, nfc->regs + NFC_REG_TIMING_CTL);
 	writel(sunxi_nand->timing_cfg, nfc->regs + NFC_REG_TIMING_CFG);
 	writel(ctl, nfc->regs + NFC_REG_CTL);
-
-	sunxi_nand->selected = chip;
 }
 
 static void sunxi_nfc_read_buf(struct nand_chip *nand, uint8_t *buf, int len)
@@ -523,71 +485,6 @@ static void sunxi_nfc_write_buf(struct nand_chip *nand, const uint8_t *buf,
 	}
 }
 
-static uint8_t sunxi_nfc_read_byte(struct nand_chip *nand)
-{
-	uint8_t ret = 0;
-
-	sunxi_nfc_read_buf(nand, &ret, 1);
-
-	return ret;
-}
-
-static void sunxi_nfc_cmd_ctrl(struct nand_chip *nand, int dat,
-			       unsigned int ctrl)
-{
-	struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
-	struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
-	int ret;
-
-	if (dat == NAND_CMD_NONE && (ctrl & NAND_NCE) &&
-	    !(ctrl & (NAND_CLE | NAND_ALE))) {
-		u32 cmd = 0;
-
-		if (!sunxi_nand->addr_cycles && !sunxi_nand->cmd_cycles)
-			return;
-
-		if (sunxi_nand->cmd_cycles--)
-			cmd |= NFC_SEND_CMD1 | sunxi_nand->cmd[0];
-
-		if (sunxi_nand->cmd_cycles--) {
-			cmd |= NFC_SEND_CMD2;
-			writel(sunxi_nand->cmd[1],
-			       nfc->regs + NFC_REG_RCMD_SET);
-		}
-
-		sunxi_nand->cmd_cycles = 0;
-
-		if (sunxi_nand->addr_cycles) {
-			cmd |= NFC_SEND_ADR |
-			       NFC_ADR_NUM(sunxi_nand->addr_cycles);
-			writel(sunxi_nand->addr[0],
-			       nfc->regs + NFC_REG_ADDR_LOW);
-		}
-
-		if (sunxi_nand->addr_cycles > 4)
-			writel(sunxi_nand->addr[1],
-			       nfc->regs + NFC_REG_ADDR_HIGH);
-
-		ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
-		if (ret)
-			return;
-
-		writel(cmd, nfc->regs + NFC_REG_CMD);
-		sunxi_nand->addr[0] = 0;
-		sunxi_nand->addr[1] = 0;
-		sunxi_nand->addr_cycles = 0;
-		sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0);
-	}
-
-	if (ctrl & NAND_CLE) {
-		sunxi_nand->cmd[sunxi_nand->cmd_cycles++] = dat;
-	} else if (ctrl & NAND_ALE) {
-		sunxi_nand->addr[sunxi_nand->addr_cycles / 4] |=
-				dat << ((sunxi_nand->addr_cycles % 4) * 8);
-		sunxi_nand->addr_cycles++;
-	}
-}
-
 /* These seed values have been extracted from Allwinner's BSP */
 static const u16 sunxi_nfc_randomizer_page_seeds[] = {
 	0x2b75, 0x0bd0, 0x5ca3, 0x62d1, 0x1c93, 0x07e9, 0x2162, 0x3a72,
@@ -1174,6 +1071,8 @@ static int sunxi_nfc_hw_ecc_read_page(struct nand_chip *nand, uint8_t *buf,
 	int ret, i, cur_off = 0;
 	bool raw_mode = false;
 
+	sunxi_nfc_select_chip(nand, nand->cur_cs);
+
 	nand_read_page_op(nand, page, 0, NULL, 0);
 
 	sunxi_nfc_hw_ecc_enable(nand);
@@ -1208,6 +1107,8 @@ static int sunxi_nfc_hw_ecc_read_page_dma(struct nand_chip *nand, u8 *buf,
 {
 	int ret;
 
+	sunxi_nfc_select_chip(nand, nand->cur_cs);
+
 	nand_read_page_op(nand, page, 0, NULL, 0);
 
 	ret = sunxi_nfc_hw_ecc_read_chunks_dma(nand, buf, oob_required, page,
@@ -1228,6 +1129,8 @@ static int sunxi_nfc_hw_ecc_read_subpage(struct nand_chip *nand,
 	int ret, i, cur_off = 0;
 	unsigned int max_bitflips = 0;
 
+	sunxi_nfc_select_chip(nand, nand->cur_cs);
+
 	nand_read_page_op(nand, page, 0, NULL, 0);
 
 	sunxi_nfc_hw_ecc_enable(nand);
@@ -1260,6 +1163,8 @@ static int sunxi_nfc_hw_ecc_read_subpage_dma(struct nand_chip *nand,
 	int nchunks = DIV_ROUND_UP(data_offs + readlen, nand->ecc.size);
 	int ret;
 
+	sunxi_nfc_select_chip(nand, nand->cur_cs);
+
 	nand_read_page_op(nand, page, 0, NULL, 0);
 
 	ret = sunxi_nfc_hw_ecc_read_chunks_dma(nand, buf, false, page, nchunks);
@@ -1279,6 +1184,8 @@ static int sunxi_nfc_hw_ecc_write_page(struct nand_chip *nand,
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	int ret, i, cur_off = 0;
 
+	sunxi_nfc_select_chip(nand, nand->cur_cs);
+
 	nand_prog_page_begin_op(nand, page, 0, NULL, 0);
 
 	sunxi_nfc_hw_ecc_enable(nand);
@@ -1314,6 +1221,8 @@ static int sunxi_nfc_hw_ecc_write_subpage(struct nand_chip *nand,
 	struct nand_ecc_ctrl *ecc = &nand->ecc;
 	int ret, i, cur_off = 0;
 
+	sunxi_nfc_select_chip(nand, nand->cur_cs);
+
 	nand_prog_page_begin_op(nand, page, 0, NULL, 0);
 
 	sunxi_nfc_hw_ecc_enable(nand);
@@ -1347,6 +1256,8 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct nand_chip *nand,
 	struct scatterlist sg;
 	int ret, i;
 
+	sunxi_nfc_select_chip(nand, nand->cur_cs);
+
 	ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
 	if (ret)
 		return ret;
@@ -1820,9 +1731,159 @@ static int sunxi_nand_attach_chip(struct nand_chip *nand)
 	return 0;
 }
 
+static int sunxi_nfc_exec_subop(struct nand_chip *nand,
+				const struct nand_subop *subop)
+{
+	struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+	u32 cmd = 0, extcmd = 0, cnt = 0, addrs[2] = { };
+	unsigned int i, j, remaining, start;
+	void *inbuf = NULL;
+	int ret;
+
+	for (i = 0; i < subop->ninstrs; i++) {
+		const struct nand_op_instr *instr = &subop->instrs[i];
+
+		switch (instr->type) {
+		case NAND_OP_CMD_INSTR:
+			if (cmd & NFC_SEND_CMD1) {
+				if (WARN_ON(cmd & NFC_SEND_CMD2))
+					return -EINVAL;
+
+				cmd |= NFC_SEND_CMD2;
+				extcmd |= instr->ctx.cmd.opcode;
+			} else {
+				cmd |= NFC_SEND_CMD1 |
+				       NFC_CMD(instr->ctx.cmd.opcode);
+			}
+			break;
+
+		case NAND_OP_ADDR_INSTR:
+			remaining = nand_subop_get_num_addr_cyc(subop, i);
+			start = nand_subop_get_addr_start_off(subop, i);
+			for (j = 0; j < 8 && j + start < remaining; j++) {
+				u32 addr = instr->ctx.addr.addrs[j + start];
+
+				addrs[j / 4] |= addr << (j % 4) * 8;
+			}
+
+			if (j)
+				cmd |= NFC_SEND_ADR | NFC_ADR_NUM(j);
+
+			break;
+
+		case NAND_OP_DATA_IN_INSTR:
+		case NAND_OP_DATA_OUT_INSTR:
+			start = nand_subop_get_data_start_off(subop, i);
+			remaining = nand_subop_get_data_len(subop, i);
+			cnt = min_t(u32, remaining, NFC_SRAM_SIZE);
+			cmd |= NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD;
+
+			if (instr->type == NAND_OP_DATA_OUT_INSTR) {
+				cmd |= NFC_ACCESS_DIR;
+				memcpy_toio(nfc->regs + NFC_RAM0_BASE,
+					    instr->ctx.data.buf.out + start,
+					    cnt);
+			} else {
+				inbuf = instr->ctx.data.buf.in + start;
+			}
+
+			break;
+
+		case NAND_OP_WAITRDY_INSTR:
+			cmd |= NFC_WAIT_FLAG;
+			break;
+		}
+	}
+
+	ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
+	if (ret)
+		return ret;
+
+	if (cmd & NFC_SEND_ADR) {
+		writel(addrs[0], nfc->regs + NFC_REG_ADDR_LOW);
+		writel(addrs[1], nfc->regs + NFC_REG_ADDR_HIGH);
+	}
+
+	if (cmd & NFC_SEND_CMD2)
+		writel(extcmd,
+		       nfc->regs +
+		       (cmd & NFC_ACCESS_DIR ?
+			NFC_REG_WCMD_SET : NFC_REG_RCMD_SET));
+
+	if (cmd & NFC_DATA_TRANS)
+		writel(cnt, nfc->regs + NFC_REG_CNT);
+
+	writel(cmd, nfc->regs + NFC_REG_CMD);
+
+	ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG,
+				    !(cmd & NFC_WAIT_FLAG) && cnt < 64,
+				    0);
+	if (ret)
+		return ret;
+
+	if (inbuf)
+		memcpy_fromio(inbuf, nfc->regs + NFC_RAM0_BASE, cnt);
+
+	return 0;
+}
+
+static int sunxi_nfc_soft_waitrdy(struct nand_chip *nand,
+				  const struct nand_subop *subop)
+{
+	return nand_soft_waitrdy(nand,
+				 subop->instrs[0].ctx.waitrdy.timeout_ms);
+}
+
+static const struct nand_op_parser sunxi_nfc_op_parser = NAND_OP_PARSER(
+	NAND_OP_PARSER_PATTERN(sunxi_nfc_exec_subop,
+			       NAND_OP_PARSER_PAT_CMD_ELEM(true),
+			       NAND_OP_PARSER_PAT_ADDR_ELEM(true, 8),
+			       NAND_OP_PARSER_PAT_CMD_ELEM(true),
+			       NAND_OP_PARSER_PAT_WAITRDY_ELEM(true),
+			       NAND_OP_PARSER_PAT_DATA_IN_ELEM(true, 1024)),
+	NAND_OP_PARSER_PATTERN(sunxi_nfc_exec_subop,
+			       NAND_OP_PARSER_PAT_CMD_ELEM(true),
+			       NAND_OP_PARSER_PAT_ADDR_ELEM(true, 8),
+			       NAND_OP_PARSER_PAT_DATA_OUT_ELEM(true, 1024),
+			       NAND_OP_PARSER_PAT_CMD_ELEM(true),
+			       NAND_OP_PARSER_PAT_WAITRDY_ELEM(true)),
+);
+
+static const struct nand_op_parser sunxi_nfc_norb_op_parser = NAND_OP_PARSER(
+	NAND_OP_PARSER_PATTERN(sunxi_nfc_exec_subop,
+			       NAND_OP_PARSER_PAT_CMD_ELEM(true),
+			       NAND_OP_PARSER_PAT_ADDR_ELEM(true, 8),
+			       NAND_OP_PARSER_PAT_CMD_ELEM(true),
+			       NAND_OP_PARSER_PAT_DATA_IN_ELEM(true, 1024)),
+	NAND_OP_PARSER_PATTERN(sunxi_nfc_exec_subop,
+			       NAND_OP_PARSER_PAT_CMD_ELEM(true),
+			       NAND_OP_PARSER_PAT_ADDR_ELEM(true, 8),
+			       NAND_OP_PARSER_PAT_DATA_OUT_ELEM(true, 1024),
+			       NAND_OP_PARSER_PAT_CMD_ELEM(true)),
+	NAND_OP_PARSER_PATTERN(sunxi_nfc_soft_waitrdy,
+			       NAND_OP_PARSER_PAT_WAITRDY_ELEM(false)),
+);
+
+static int sunxi_nfc_exec_op(struct nand_chip *nand,
+			     const struct nand_operation *op, bool check_only)
+{
+	struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
+	const struct nand_op_parser *parser;
+
+	sunxi_nfc_select_chip(nand, op->cs);
+
+	if (sunxi_nand->sels[op->cs].rb >= 0)
+		parser = &sunxi_nfc_op_parser;
+	else
+		parser = &sunxi_nfc_norb_op_parser;
+
+	return nand_op_parser_exec_op(nand, parser, op, check_only);
+}
+
 static const struct nand_controller_ops sunxi_nand_controller_ops = {
 	.attach_chip = sunxi_nand_attach_chip,
 	.setup_data_interface = sunxi_nfc_setup_data_interface,
+	.exec_op = sunxi_nfc_exec_op,
 };
 
 static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
@@ -1853,7 +1914,6 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
 	}
 
 	sunxi_nand->nsels = nsels;
-	sunxi_nand->selected = -1;
 
 	for (i = 0; i < nsels; i++) {
 		ret = of_property_read_u32_index(np, "reg", i, &tmp);
@@ -1886,7 +1946,6 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
 
 	nand = &sunxi_nand->nand;
 	/* Default tR value specified in the ONFI spec (chapter 4.15.1) */
-	nand->legacy.chip_delay = 200;
 	nand->controller = &nfc->controller;
 	nand->controller->ops = &sunxi_nand_controller_ops;
 
@@ -1896,11 +1955,6 @@ static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
 	 */
 	nand->ecc.mode = NAND_ECC_HW;
 	nand_set_flash_node(nand, np);
-	nand->legacy.select_chip = sunxi_nfc_select_chip;
-	nand->legacy.cmd_ctrl = sunxi_nfc_cmd_ctrl;
-	nand->legacy.read_buf = sunxi_nfc_read_buf;
-	nand->legacy.write_buf = sunxi_nfc_write_buf;
-	nand->legacy.read_byte = sunxi_nfc_read_byte;
 
 	mtd = nand_to_mtd(nand);
 	mtd->dev.parent = dev;
-- 
2.17.1

[PATCH v2 7/7] mtd: rawnand: sunxi: Fix kernel doc headers

[Boris Brezillon]

Fix the struct description and use standard kernel-doc header format
(even if the file is not parsed by the doc generator).

We also replace tabs by a single space.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 60 +++++++++++++++----------------
 1 file changed, 30 insertions(+), 30 deletions(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index d6b07067ed26..93e18f48f1e1 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -154,37 +154,36 @@
 
 #define NFC_MAX_CS		7
 
-/*
- * Chip Select structure: stores information related to NAND Chip Select
+/**
+ * struct sunxi_nand_chip_sel - stores information related to NAND Chip Select
  *
- * @cs:		the NAND CS id used to communicate with a NAND Chip
- * @rb:		the Ready/Busy pin ID. -1 means no R/B pin connected to the
- *		NFC
+ * @cs: the NAND CS id used to communicate with a NAND Chip
+ * @rb: the Ready/Busy pin ID. -1 means no R/B pin connected to the NFC
  */
 struct sunxi_nand_chip_sel {
 	u8 cs;
 	s8 rb;
 };
 
-/*
- * sunxi HW ECC infos: stores information related to HW ECC support
+/**
+ * struct sunxi_nand_hw_ecc - stores information related to HW ECC support
  *
- * @mode:	the sunxi ECC mode field deduced from ECC requirements
+ * @mode: the sunxi ECC mode field deduced from ECC requirements
  */
 struct sunxi_nand_hw_ecc {
 	int mode;
 };
 
-/*
- * NAND chip structure: stores NAND chip device related information
+/**
+ * struct sunxi_nand_chip - stores NAND chip device related information
  *
- * @node:		used to store NAND chips into a list
- * @nand:		base NAND chip structure
- * @mtd:		base MTD structure
- * @clk_rate:		clk_rate required for this NAND chip
- * @timing_cfg		TIMING_CFG register value for this NAND chip
- * @nsels:		number of CS lines required by the NAND chip
- * @sels:		array of CS lines descriptions
+ * @node: used to store NAND chips into a list
+ * @nand: base NAND chip structure
+ * @clk_rate: clk_rate required for this NAND chip
+ * @timing_cfg: TIMING_CFG register value for this NAND chip
+ * @timing_ctl: TIMING_CTL register value for this NAND chip
+ * @nsels: number of CS lines required by the NAND chip
+ * @sels: array of CS lines descriptions
  */
 struct sunxi_nand_chip {
 	struct list_head node;
@@ -201,20 +200,21 @@ static inline struct sunxi_nand_chip *to_sunxi_nand(struct nand_chip *nand)
 	return container_of(nand, struct sunxi_nand_chip, nand);
 }
 
-/*
- * NAND Controller structure: stores sunxi NAND controller information
+/**
+ * struct sunxi_nfc - stores sunxi NAND controller information
  *
- * @controller:		base controller structure
- * @dev:		parent device (used to print error messages)
- * @regs:		NAND controller registers
- * @ahb_clk:		NAND Controller AHB clock
- * @mod_clk:		NAND Controller mod clock
- * @assigned_cs:	bitmask describing already assigned CS lines
- * @clk_rate:		NAND controller current clock rate
- * @chips:		a list containing all the NAND chips attached to
- *			this NAND controller
- * @complete:		a completion object used to wait for NAND
- *			controller events
+ * @controller: base controller structure
+ * @dev: parent device (used to print error messages)
+ * @regs: NAND controller registers
+ * @ahb_clk: NAND controller AHB clock
+ * @mod_clk: NAND controller mod clock
+ * @reset: NAND controller reset line
+ * @assigned_cs: bitmask describing already assigned CS lines
+ * @clk_rate: NAND controller current clock rate
+ * @chips: a list containing all the NAND chips attached to this NAND
+ *	   controller
+ * @complete: a completion object used to wait for NAND controller events
+ * @dmac: the DMA channel attached to the NAND controller
  */
 struct sunxi_nfc {
 	struct nand_controller controller;
-- 
2.17.1

Re: [PATCH v2 0/7] mtd: rawnand: sunxi: Random cleanups + exec_op

[Miquel Raynal]

Hi Boris,

Boris Brezillon <boris.brezillon@bootlin.com> wrote on Sat, 15 Dec 2018
09:24:30 +0100:

> Hello,
> 
> This series converts the sunxi NAND controller driver to exec_op and
> cleans a few things up.
> 

Series applied on nand/next.

Thanks,
Miquèl