2 * linux/include/linux/mtd/onenand.h
4 * Copyright (C) 2005-2007 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #ifndef __LINUX_MTD_ONENAND_H
13 #define __LINUX_MTD_ONENAND_H
15 #include <linux/mtd/onenand_regs.h>
17 /* Note: The header order is impoertant */
18 #include <onenand_uboot.h>
20 #include <linux/mtd/compat.h>
21 #include <linux/mtd/bbm.h>
24 #define MAX_BUFFERRAM 2
25 #define MAX_ONENAND_PAGESIZE (4096 + 128)
27 /* Scan and identify a OneNAND device */
28 extern int onenand_scan (struct mtd_info *mtd, int max_chips);
29 /* Free resources held by the OneNAND device */
30 extern void onenand_release (struct mtd_info *mtd);
33 * struct onenand_bufferram - OneNAND BufferRAM Data
34 * @param blockpage block & page address in BufferRAM
36 struct onenand_bufferram {
41 * struct onenand_chip - OneNAND Private Flash Chip Data
42 * @param base [BOARDSPECIFIC] address to access OneNAND
43 * @dies: [INTERN][FLEXONENAND] number of dies on chip
44 * @boundary: [INTERN][FLEXONENAND] Boundary of the dies
45 * @diesize: [INTERN][FLEXONENAND] Size of the dies
46 * @param chipsize [INTERN] the size of one chip for multichip arrays
47 * @param device_id [INTERN] device ID
48 * @param verstion_id [INTERN] version ID
49 * @technology [INTERN] describes the internal NAND array technology such as SLC or MLC.
50 * @density_mask: [INTERN] chip density, used for DDP devices
51 * @param options [BOARDSPECIFIC] various chip options. They can partly be set to inform onenand_scan about
52 * @param erase_shift [INTERN] number of address bits in a block
53 * @param page_shift [INTERN] number of address bits in a page
54 * @param ppb_shift [INTERN] number of address bits in a pages per block
55 * @param page_mask [INTERN] a page per block mask
56 * @param writesize [INTERN] a real page size
57 * @param bufferam_index [INTERN] BufferRAM index
58 * @param bufferam [INTERN] BufferRAM info
59 * @param readw [REPLACEABLE] hardware specific function for read short
60 * @param writew [REPLACEABLE] hardware specific function for write short
61 * @param command [REPLACEABLE] hardware specific function for writing commands to the chip
62 * @param wait [REPLACEABLE] hardware specific function for wait on ready
63 * @param read_bufferram [REPLACEABLE] hardware specific function for BufferRAM Area
64 * @param write_bufferram [REPLACEABLE] hardware specific function for BufferRAM Area
65 * @param chip_lock [INTERN] spinlock used to protect access to this structure and the chip
66 * @param wq [INTERN] wait queue to sleep on if a OneNAND operation is in progress
67 * @param state [INTERN] the current state of the OneNAND device
68 * @param autooob [REPLACEABLE] the default (auto)placement scheme
69 * @param priv [OPTIONAL] pointer to private chip date
74 unsigned int boundary[MAX_DIES];
75 unsigned int diesize[MAX_DIES];
76 unsigned int chipsize;
77 unsigned int device_id;
78 unsigned int version_id;
79 unsigned int technology;
80 unsigned int density_mask;
83 unsigned int erase_shift;
84 unsigned int page_shift;
85 unsigned int ppb_shift; /* Pages per block shift */
86 unsigned int page_mask;
87 unsigned int writesize;
89 unsigned int bufferram_index;
90 struct onenand_bufferram bufferram[MAX_BUFFERRAM];
92 int (*command) (struct mtd_info *mtd, int cmd, loff_t address,
94 int (*wait) (struct mtd_info *mtd, int state);
95 int (*bbt_wait) (struct mtd_info *mtd, int state);
96 void (*unlock_all)(struct mtd_info *mtd);
97 int (*read_bufferram) (struct mtd_info *mtd, loff_t addr, int area,
98 unsigned char *buffer, int offset, size_t count);
99 int (*write_bufferram) (struct mtd_info *mtd, loff_t addr, int area,
100 const unsigned char *buffer, int offset,
102 unsigned short (*read_word) (void __iomem *addr);
103 void (*write_word) (unsigned short value, void __iomem *addr);
104 void (*mmcontrol) (struct mtd_info *mtd, int sync_read);
105 int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
106 int (*scan_bbt)(struct mtd_info *mtd);
108 unsigned char *main_buf;
109 unsigned char *spare_buf;
110 #ifdef DONT_USE_UBOOT
111 spinlock_t chip_lock;
112 wait_queue_head_t wq;
115 unsigned char *page_buf;
116 unsigned char *oob_buf;
118 struct nand_oobinfo *autooob;
120 struct nand_ecclayout *ecclayout;
130 #define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index)
131 #define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1)
132 #define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1)
133 #define ONENAND_SET_PREV_BUFFERRAM(this) (this->bufferram_index ^= 1)
134 #define ONENAND_SET_BUFFERRAM0(this) (this->bufferram_index = 0)
135 #define ONENAND_SET_BUFFERRAM1(this) (this->bufferram_index = 1)
137 #define FLEXONENAND(this) (this->device_id & DEVICE_IS_FLEXONENAND)
138 #define ONENAND_IS_MLC(this) (this->technology & ONENAND_TECHNOLOGY_IS_MLC)
139 #define ONENAND_IS_DDP(this) \
140 (this->device_id & ONENAND_DEVICE_IS_DDP)
142 #define ONENAND_IS_2PLANE(this) (0)
147 #define ONENAND_HAS_CONT_LOCK (0x0001)
148 #define ONENAND_HAS_UNLOCK_ALL (0x0002)
149 #define ONENAND_HAS_2PLANE (0x0004)
150 #define ONENAND_RUNTIME_BADBLOCK_CHECK (0x0200)
151 #define ONENAND_PAGEBUF_ALLOC (0x1000)
152 #define ONENAND_OOBBUF_ALLOC (0x2000)
155 * OneNAND Flash Manufacturer ID Codes
157 #define ONENAND_MFR_NUMONYX 0x20
158 #define ONENAND_MFR_SAMSUNG 0xec
161 * struct nand_manufacturers - NAND Flash Manufacturer ID Structure
162 * @param name: Manufacturer name
163 * @param id: manufacturer ID code of device.
165 struct onenand_manufacturers {
170 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
171 struct mtd_oob_ops *ops);
173 unsigned int onenand_block(struct onenand_chip *this, loff_t addr);
174 int flexonenand_region(struct mtd_info *mtd, loff_t addr);
175 #endif /* __LINUX_MTD_ONENAND_H */