mtd: rawnand: Move JEDEC code to nand_jedec.c

This moves JEDEC related code to nand_jedec.c and JEDEC related
struct/macros to include/linux/mtd/jedec.h.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

4 files changed, 118 insertions, 97 deletions

diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile
index cc9f50f3ad1b..be2c17863ee5 100644
--- a/drivers/mtd/nand/raw/Makefile
+++ b/drivers/mtd/nand/raw/Makefile
@@ -59,6 +59,7 @@ obj-$(CONFIG_MTD_NAND_TEGRA)		+= tegra_nand.o
 
 nand-objs := nand_base.o nand_legacy.o nand_bbt.o nand_timings.o nand_ids.o
 nand-objs += nand_onfi.o
+nand-objs += nand_jedec.o
 nand-objs += nand_amd.o
 nand-objs += nand_hynix.o
 nand-objs += nand_macronix.o
diff --git a/drivers/mtd/nand/raw/internals.h b/drivers/mtd/nand/raw/internals.h
index 1ce720a8d756..88b5da620e7d 100644
--- a/drivers/mtd/nand/raw/internals.h
+++ b/drivers/mtd/nand/raw/internals.h
@@ -108,4 +108,7 @@ int nand_legacy_check_hooks(struct nand_chip *chip);
 u16 onfi_crc16(u16 crc, u8 const *p, size_t len);
 int nand_onfi_detect(struct nand_chip *chip);
 
+/* JEDEC functions */
+int nand_jedec_detect(struct nand_chip *chip);
+
 #endif /* __LINUX_RAWNAND_INTERNALS */
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 812e8bd6ad82..dc3955da0426 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4388,102 +4388,6 @@ void sanitize_string(uint8_t *s, size_t len)
 }
 
 /*
- * Check if the NAND chip is JEDEC compliant, returns 1 if it is, 0 otherwise.
- */
-static int nand_flash_detect_jedec(struct nand_chip *chip)
-{
-	struct mtd_info *mtd = nand_to_mtd(chip);
-	struct nand_jedec_params *p;
-	struct jedec_ecc_info *ecc;
-	int jedec_version = 0;
-	char id[5];
-	int i, val, ret;
-
-	/* Try JEDEC for unknown chip or LP */
-	ret = nand_readid_op(chip, 0x40, id, sizeof(id));
-	if (ret || strncmp(id, "JEDEC", sizeof(id)))
-		return 0;
-
-	/* JEDEC chip: allocate a buffer to hold its parameter page */
-	p = kzalloc(sizeof(*p), GFP_KERNEL);
-	if (!p)
-		return -ENOMEM;
-
-	ret = nand_read_param_page_op(chip, 0x40, NULL, 0);
-	if (ret) {
-		ret = 0;
-		goto free_jedec_param_page;
-	}
-
-	for (i = 0; i < 3; i++) {
-		ret = nand_read_data_op(chip, p, sizeof(*p), true);
-		if (ret) {
-			ret = 0;
-			goto free_jedec_param_page;
-		}
-
-		if (onfi_crc16(ONFI_CRC_BASE, (uint8_t *)p, 510) ==
-				le16_to_cpu(p->crc))
-			break;
-	}
-
-	if (i == 3) {
-		pr_err("Could not find valid JEDEC parameter page; aborting\n");
-		goto free_jedec_param_page;
-	}
-
-	/* Check version */
-	val = le16_to_cpu(p->revision);
-	if (val & (1 << 2))
-		jedec_version = 10;
-	else if (val & (1 << 1))
-		jedec_version = 1; /* vendor specific version */
-
-	if (!jedec_version) {
-		pr_info("unsupported JEDEC version: %d\n", val);
-		goto free_jedec_param_page;
-	}
-
-	sanitize_string(p->manufacturer, sizeof(p->manufacturer));
-	sanitize_string(p->model, sizeof(p->model));
-	chip->parameters.model = kstrdup(p->model, GFP_KERNEL);
-	if (!chip->parameters.model) {
-		ret = -ENOMEM;
-		goto free_jedec_param_page;
-	}
-
-	mtd->writesize = le32_to_cpu(p->byte_per_page);
-
-	/* Please reference to the comment for nand_flash_detect_onfi. */
-	mtd->erasesize = 1 << (fls(le32_to_cpu(p->pages_per_block)) - 1);
-	mtd->erasesize *= mtd->writesize;
-
-	mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
-
-	/* Please reference to the comment for nand_flash_detect_onfi. */
-	chip->chipsize = 1 << (fls(le32_to_cpu(p->blocks_per_lun)) - 1);
-	chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count;
-	chip->bits_per_cell = p->bits_per_cell;
-
-	if (le16_to_cpu(p->features) & JEDEC_FEATURE_16_BIT_BUS)
-		chip->options |= NAND_BUSWIDTH_16;
-
-	/* ECC info */
-	ecc = &p->ecc_info[0];
-
-	if (ecc->codeword_size >= 9) {
-		chip->ecc_strength_ds = ecc->ecc_bits;
-		chip->ecc_step_ds = 1 << ecc->codeword_size;
-	} else {
-		pr_warn("Invalid codeword size\n");
-	}
-
-free_jedec_param_page:
-	kfree(p);
-	return ret;
-}
-
-/*
  * nand_id_has_period - Check if an ID string has a given wraparound period
  * @id_data: the ID string
  * @arrlen: the length of the @id_data array
@@ -4795,7 +4699,7 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type)
 			goto ident_done;
 
 		/* Check if the chip is JEDEC compliant */
-		ret = nand_flash_detect_jedec(chip);
+		ret = nand_jedec_detect(chip);
 		if (ret < 0)
 			return ret;
 		else if (ret)
diff --git a/drivers/mtd/nand/raw/nand_jedec.c b/drivers/mtd/nand/raw/nand_jedec.c
new file mode 100644
index 000000000000..5c26492c841d
--- /dev/null
+++ b/drivers/mtd/nand/raw/nand_jedec.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
+ *		  2002-2006 Thomas Gleixner (tglx@linutronix.de)
+ *
+ *  Credits:
+ *	David Woodhouse for adding multichip support
+ *
+ *	Aleph One Ltd. and Toby Churchill Ltd. for supporting the
+ *	rework for 2K page size chips
+ *
+ * This file contains all ONFI helpers.
+ */
+
+#include <linux/slab.h>
+
+#include "internals.h"
+
+/*
+ * Check if the NAND chip is JEDEC compliant, returns 1 if it is, 0 otherwise.
+ */
+int nand_jedec_detect(struct nand_chip *chip)
+{
+	struct mtd_info *mtd = nand_to_mtd(chip);
+	struct nand_jedec_params *p;
+	struct jedec_ecc_info *ecc;
+	int jedec_version = 0;
+	char id[5];
+	int i, val, ret;
+
+	/* Try JEDEC for unknown chip or LP */
+	ret = nand_readid_op(chip, 0x40, id, sizeof(id));
+	if (ret || strncmp(id, "JEDEC", sizeof(id)))
+		return 0;
+
+	/* JEDEC chip: allocate a buffer to hold its parameter page */
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	if (!p)
+		return -ENOMEM;
+
+	ret = nand_read_param_page_op(chip, 0x40, NULL, 0);
+	if (ret) {
+		ret = 0;
+		goto free_jedec_param_page;
+	}
+
+	for (i = 0; i < 3; i++) {
+		ret = nand_read_data_op(chip, p, sizeof(*p), true);
+		if (ret) {
+			ret = 0;
+			goto free_jedec_param_page;
+		}
+
+		if (onfi_crc16(ONFI_CRC_BASE, (uint8_t *)p, 510) ==
+				le16_to_cpu(p->crc))
+			break;
+	}
+
+	if (i == 3) {
+		pr_err("Could not find valid JEDEC parameter page; aborting\n");
+		goto free_jedec_param_page;
+	}
+
+	/* Check version */
+	val = le16_to_cpu(p->revision);
+	if (val & (1 << 2))
+		jedec_version = 10;
+	else if (val & (1 << 1))
+		jedec_version = 1; /* vendor specific version */
+
+	if (!jedec_version) {
+		pr_info("unsupported JEDEC version: %d\n", val);
+		goto free_jedec_param_page;
+	}
+
+	sanitize_string(p->manufacturer, sizeof(p->manufacturer));
+	sanitize_string(p->model, sizeof(p->model));
+	chip->parameters.model = kstrdup(p->model, GFP_KERNEL);
+	if (!chip->parameters.model) {
+		ret = -ENOMEM;
+		goto free_jedec_param_page;
+	}
+
+	mtd->writesize = le32_to_cpu(p->byte_per_page);
+
+	/* Please reference to the comment for nand_flash_detect_onfi. */
+	mtd->erasesize = 1 << (fls(le32_to_cpu(p->pages_per_block)) - 1);
+	mtd->erasesize *= mtd->writesize;
+
+	mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
+
+	/* Please reference to the comment for nand_flash_detect_onfi. */
+	chip->chipsize = 1 << (fls(le32_to_cpu(p->blocks_per_lun)) - 1);
+	chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count;
+	chip->bits_per_cell = p->bits_per_cell;
+
+	if (le16_to_cpu(p->features) & JEDEC_FEATURE_16_BIT_BUS)
+		chip->options |= NAND_BUSWIDTH_16;
+
+	/* ECC info */
+	ecc = &p->ecc_info[0];
+
+	if (ecc->codeword_size >= 9) {
+		chip->ecc_strength_ds = ecc->ecc_bits;
+		chip->ecc_step_ds = 1 << ecc->codeword_size;
+	} else {
+		pr_warn("Invalid codeword size\n");
+	}
+
+free_jedec_param_page:
+	kfree(p);
+	return ret;
+}