[ PATCH V2 3/7] MTD : add the database for the NANDs

[b32955@freescale.com (Huang Shijie)]

This is a new database for the NANDs which is searched by the id_bytes.

Signed-off-by: Huang Shijie <b32955@freescale.com>
---
 drivers/mtd/nand/nand_device_info.c |  154 +++++++++++++++++++++++++++++++++++
 drivers/mtd/nand/nand_device_info.h |   83 +++++++++++++++++++
 2 files changed, 237 insertions(+), 0 deletions(-)
 create mode 100644 drivers/mtd/nand/nand_device_info.c
 create mode 100644 drivers/mtd/nand/nand_device_info.h

diff --git a/drivers/mtd/nand/nand_device_info.c b/drivers/mtd/nand/nand_device_info.c
new file mode 100644
index 0000000..3ceec9c
--- /dev/null
+++ b/drivers/mtd/nand/nand_device_info.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#include <asm/sizes.h>
+#include <linux/mtd/nand.h>
+
+#include "nand_device_info.h"
+
+static const struct nand_device_info samsung_nand[] = {
+	{
+		.id	= { 0xec, 0xd3, 0x14, 0x25, 0x64, 0xec, 0xd3, 0x14 },
+		.id_len	= 8,
+		.desc	= "K9G8G08U0M, K9HAG08U1M",
+		.attr	= ATTR(MLC, 1LL * SZ_1G, 128, 2 * SZ_1K + 64, 8, 512),
+	}, {
+		.id	= { 0xec, 0xd7, 0xd5, 0x29, 0x38, 0x41, 0xec, 0xd7 },
+		.id_len	= 8,
+		.desc	= "K9LBG08U0D",
+		.attr	= ATTR(MLC, 4LL * SZ_1G, 128, 4 * SZ_1K + 218, 16, 512),
+	}, {
+		.id	= { 0xec, 0xd5, 0x14, 0xb6, 0x74, 0xec, 0xd5, 0x14 },
+		.id_len	= 8,
+		.desc	= "K9GAG08U0M",
+		.attr	= ATTR(MLC, 2LL * SZ_1G, 128, 4 * SZ_1K + 218, 16, 512),
+	}, {
+		/* end of the table. */
+		.id	= { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
+	},
+};
+
+/* macro to get the id bytes */
+#define ID_GET_MFR_CODE(id)  ((id)[0])
+
+void nand_device_print_info(struct nand_device_info *info)
+{
+	unsigned    i;
+	const char  *mfr_name;
+	const char  *cell_technology_name;
+	uint64_t    chip_size;
+	const char  *chip_size_units;
+	unsigned    page_size;
+	unsigned    oob_size;
+	struct nand_attr *attr		= &info->attr;
+
+	/* Prepare the manufacturer name. */
+	mfr_name = "Unknown";
+	for (i = 0; nand_manuf_ids[i].id; i++) {
+		if (nand_manuf_ids[i].id == ID_GET_MFR_CODE(info->id)) {
+			mfr_name = nand_manuf_ids[i].name;
+			break;
+		}
+	}
+
+	/* Prepare the name of the cell technology. */
+	switch (attr->cell_technology) {
+	case SLC:
+		cell_technology_name = "SLC";
+		break;
+	case MLC:
+		cell_technology_name = "MLC";
+		break;
+	default:
+		cell_technology_name = "Unknown";
+		break;
+	}
+
+	/* Prepare the chip size. */
+	if ((attr->chip_size_in_bytes >= SZ_1G) &&
+					!(attr->chip_size_in_bytes % SZ_1G)) {
+		chip_size       = attr->chip_size_in_bytes / ((uint64_t) SZ_1G);
+		chip_size_units = "GiB";
+	} else if ((attr->chip_size_in_bytes >= SZ_1M) &&
+					!(attr->chip_size_in_bytes % SZ_1M)) {
+		chip_size       = attr->chip_size_in_bytes / ((uint64_t) SZ_1M);
+		chip_size_units = "MiB";
+	} else {
+		chip_size       = attr->chip_size_in_bytes;
+		chip_size_units = "B";
+	}
+
+	/* Prepare the page geometry. */
+	page_size = (1 << (fls(attr->page_total_size_in_bytes) - 1));
+	oob_size  = attr->page_total_size_in_bytes - page_size;
+
+	/* Print the infomation. */
+	pr_info("--------------------------------------\n");
+	pr_info("	NAND device infomation (RAW)\n");
+	pr_info("--------------------------------------\n");
+	pr_info("Manufacturer      : %s (0x%02x)\n", mfr_name, info->id[0]);
+	pr_info("Device Code       : 0x%02x\n", info->id[1]);
+	pr_info("Cell Technology   : %s\n", cell_technology_name);
+	pr_info("Chip Size         : %llu %s\n", chip_size, chip_size_units);
+	pr_info("Pages per Block   : %u\n", attr->block_size_in_pages);
+	pr_info("Page Geometry     : %u+%u\n", page_size, oob_size);
+	pr_info("ECC Strength      : %u bits\n", attr->ecc_strength_in_bits);
+	pr_info("ECC Size          : %u B\n", attr->ecc_size_in_bytes);
+	pr_info("Description       : %s\n", info->desc);
+}
+
+static struct nand_device_info * __init
+search_table(const struct nand_device_info *table, const uint8_t id[])
+{
+	struct nand_device_info *info = (struct nand_device_info *)table;
+
+	while (ID_GET_MFR_CODE(info->id)) {
+		int i;
+
+		/* match all the valid id bytes. Is it too strict? */
+		for (i = 0; i < info->id_len; i++)
+			if (info->id[i] != id[i])
+				break;
+
+		/* found it */
+		if (i == info->id_len)
+			return info;
+		info++;
+	}
+	return NULL;
+}
+
+struct nand_device_mfr_info {
+	uint8_t                  id;
+	const struct nand_device_info  *table;
+};
+
+static const struct nand_device_mfr_info  nand_device_mfr_directory[] = {
+	{ NAND_MFR_SAMSUNG, samsung_nand },
+	{ 0, NULL },
+};
+
+struct nand_device_info *nand_device_get_info(const uint8_t id[])
+{
+	uint8_t mfr_id = ID_GET_MFR_CODE(id);
+	unsigned i;
+
+	for (i = 0; nand_device_mfr_directory[i].id; i++) {
+		if (nand_device_mfr_directory[i].id == mfr_id) {
+			const struct nand_device_info  *table;
+
+			table = nand_device_mfr_directory[i].table;
+			return search_table(table, id);
+		}
+	}
+	return NULL;
+}
diff --git a/drivers/mtd/nand/nand_device_info.h b/drivers/mtd/nand/nand_device_info.h
new file mode 100644
index 0000000..fe22233
--- /dev/null
+++ b/drivers/mtd/nand/nand_device_info.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+#ifndef __DRIVERS_NAND_DEVICE_INFO_H
+#define __DRIVERS_NAND_DEVICE_INFO_H
+
+enum nand_device_cell_technology {
+	SLC = 0,
+	MLC = 1,
+};
+
+/**
+ * @cell_technology:           The storage cell technology.
+ * @chip_size_in_bytes:        The total size of the storage behind a single
+ *                             chip select, in bytes. Notice that this is *not*
+ *                             necessarily the total size of the storage in a
+ *                             *package*, which may contain several chips.
+ * @block_size_in_pages:       The number of pages in a block.
+ * @page_total_size_in_bytes:  The total size of a page, in bytes, including
+ *                             both the data and the OOB.
+ * @ecc_strength_in_bits:      The strength of the ECC called for by the
+ *                             manufacturer, in number of correctable bits.
+ * @ecc_size_in_bytes:         The size of the data block over which the
+ *                             manufacturer calls for the given ECC algorithm
+ *                             and strength.
+ */
+struct nand_attr {
+	/* Technology */
+	enum nand_device_cell_technology  cell_technology;
+
+	/* Geometry */
+	uint64_t	chip_size_in_bytes;
+	uint32_t	block_size_in_pages;
+	uint32_t	page_total_size_in_bytes;
+
+	/* ECC */
+	uint16_t	ecc_strength_in_bits;
+	uint16_t	ecc_size_in_bytes;
+};
+
+#define ID_BYTES	(8)
+/*
+ * struct nand_device_info - Information about a single NAND Flash device.
+ *
+ * This structure contains all the *essential* information about a NAND Flash
+ * device, derived from the device's data sheet.
+ */
+struct nand_device_info {
+	/* id */
+	uint8_t			id[ID_BYTES];
+	unsigned int		id_len;
+
+	/* Description */
+	const char		*desc;
+
+	/* attribute*/
+	struct nand_attr	attr;
+};
+
+/* macro for the NAND attribute */
+#define ATTR(_a, _b, _c, _d, _e, _f)			\
+	{						\
+		.cell_technology          = (_a),	\
+		.chip_size_in_bytes       = (_b),	\
+		.block_size_in_pages      = (_c),	\
+		.page_total_size_in_bytes = (_d),	\
+		.ecc_strength_in_bits     = (_e),	\
+		.ecc_size_in_bytes        = (_f),	\
+	}
+
+struct nand_device_info *nand_device_get_info(const uint8_t id_bytes[]);
+void nand_device_print_info(struct nand_device_info *info);
+
+#endif
-- 
1.7.0.4