path: root/drivers/mtd/nand/fsmc_nand.c

/*
 * drivers/mtd/nand/fsmc_nand.c
 *
 * ST Microelectronics
 * Flexible Static Memory Controller (FSMC)
 * Driver for NAND portions
 *
 * Copyright © 2010 ST Microelectronics
 * Vipin Kumar <vipin.kumar@st.com>
 * Ashish Priyadarshi
 *
 * Based on drivers/mtd/nand/nomadik_nand.c
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/clk.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/resource.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/mtd/fsmc.h>
#include <linux/amba/bus.h>
#include <mtd/mtd-abi.h>

static struct nand_ecclayout fsmc_ecc1_128_layout = {
	.eccbytes = 24,
	.eccpos = {2, 3, 4, 18, 19, 20, 34, 35, 36, 50, 51, 52,
		66, 67, 68, 82, 83, 84, 98, 99, 100, 114, 115, 116},
	.oobfree = {
		{.offset = 8, .length = 8},
		{.offset = 24, .length = 8},
		{.offset = 40, .length = 8},
		{.offset = 56, .length = 8},
		{.offset = 72, .length = 8},
		{.offset = 88, .length = 8},
		{.offset = 104, .length = 8},
		{.offset = 120, .length = 8}
	}
};

static struct nand_ecclayout fsmc_ecc1_64_layout = {
	.eccbytes = 12,
	.eccpos = {2, 3, 4, 18, 19, 20, 34, 35, 36, 50, 51, 52},
	.oobfree = {
		{.offset = 8, .length = 8},
		{.offset = 24, .length = 8},
		{.offset = 40, .length = 8},
		{.offset = 56, .length = 8},
	}
};

static struct nand_ecclayout fsmc_ecc1_16_layout = {
	.eccbytes = 3,
	.eccpos = {2, 3, 4},
	.oobfree = {
		{.offset = 8, .length = 8},
	}
};

/*
 * ECC4 layout for NAND of pagesize 8192 bytes & OOBsize 256 bytes. 13*16 bytes
 * of OB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block and 46
 * bytes are free for use.
 */
static struct nand_ecclayout fsmc_ecc4_256_layout = {
	.eccbytes = 208,
	.eccpos = {  2,   3,   4,   5,   6,   7,   8,
		9,  10,  11,  12,  13,  14,
		18,  19,  20,  21,  22,  23,  24,
		25,  26,  27,  28,  29,  30,
		34,  35,  36,  37,  38,  39,  40,
		41,  42,  43,  44,  45,  46,
		50,  51,  52,  53,  54,  55,  56,
		57,  58,  59,  60,  61,  62,
		66,  67,  68,  69,  70,  71,  72,
		73,  74,  75,  76,  77,  78,
		82,  83,  84,  85,  86,  87,  88,
		89,  90,  91,  92,  93,  94,
		98,  99, 100, 101, 102, 103, 104,
		105, 106, 107, 108, 109, 110,
		114, 115, 116, 117, 118, 119, 120,
		121, 122, 123, 124, 125, 126,
		130, 131, 132, 133, 134, 135, 136,
		137, 138, 139, 140, 141, 142,