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1 /*
2  *  linux/include/linux/mtd/onenand.h
3  *
4  *  Copyright (C) 2005-2007 Samsung Electronics
5  *  Kyungmin Park <kyungmin.park@samsung.com>
6  *
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.
10  */
11 
12 #ifndef __LINUX_MTD_ONENAND_H
13 #define __LINUX_MTD_ONENAND_H
14 
15 #include <linux/mtd/onenand_regs.h>
16 
17 /* Note: The header order is impoertant */
18 #include <onenand_uboot.h>
19 
20 #include <linux/compat.h>
21 #include <linux/mtd/bbm.h>
22 
23 #define MAX_DIES		2
24 #define MAX_BUFFERRAM		2
25 #define MAX_ONENAND_PAGESIZE	(4096 + 128)
26 
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);
31 
32 /**
33  * struct onenand_bufferram - OneNAND BufferRAM Data
34  * @param blockpage	block & page address in BufferRAM
35  */
36 struct onenand_bufferram {
37 	int blockpage;
38 };
39 
40 /**
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
70  */
71 struct onenand_chip {
72 	void __iomem *base;
73 	unsigned int dies;
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;
81 	unsigned int options;
82 
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;
88 
89 	unsigned int bufferram_index;
90 	struct onenand_bufferram bufferram[MAX_BUFFERRAM];
91 
92 	int (*command) (struct mtd_info *mtd, int cmd, loff_t address,
93 			size_t len);
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,
101 				size_t count);
102 	unsigned short (*read_word) (void __iomem *addr);
103 	void (*write_word) (unsigned short value, void __iomem *addr);
104 	int (*chip_probe)(struct mtd_info *mtd);
105 	void (*mmcontrol) (struct mtd_info *mtd, int sync_read);
106 	int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
107 	int (*scan_bbt)(struct mtd_info *mtd);
108 
109 	unsigned char		*main_buf;
110 	unsigned char		*spare_buf;
111 #ifdef DONT_USE_UBOOT
112 	spinlock_t chip_lock;
113 	wait_queue_head_t wq;
114 #endif
115 	int state;
116 	unsigned char		*page_buf;
117 	unsigned char		*oob_buf;
118 
119 	struct nand_oobinfo *autooob;
120 	int			subpagesize;
121 	struct nand_ecclayout	*ecclayout;
122 
123 	void *bbm;
124 
125 	void *priv;
126 };
127 
128 /*
129  * Helper macros
130  */
131 #define ONENAND_CURRENT_BUFFERRAM(this)		(this->bufferram_index)
132 #define ONENAND_NEXT_BUFFERRAM(this)		(this->bufferram_index ^ 1)
133 #define ONENAND_SET_NEXT_BUFFERRAM(this)	(this->bufferram_index ^= 1)
134 #define ONENAND_SET_PREV_BUFFERRAM(this)	(this->bufferram_index ^= 1)
135 #define ONENAND_SET_BUFFERRAM0(this)		(this->bufferram_index = 0)
136 #define ONENAND_SET_BUFFERRAM1(this)		(this->bufferram_index = 1)
137 
138 #define FLEXONENAND(this)	(this->device_id & DEVICE_IS_FLEXONENAND)
139 #define ONENAND_IS_MLC(this)	(this->technology & ONENAND_TECHNOLOGY_IS_MLC)
140 #define ONENAND_IS_DDP(this)						\
141 	(this->device_id & ONENAND_DEVICE_IS_DDP)
142 
143 #define ONENAND_IS_4KB_PAGE(this)					\
144 	(this->options & ONENAND_HAS_4KB_PAGE)
145 
146 #define ONENAND_IS_2PLANE(this)			(0)
147 
148 /*
149  * Options bits
150  */
151 #define ONENAND_HAS_CONT_LOCK		(0x0001)
152 #define ONENAND_HAS_UNLOCK_ALL		(0x0002)
153 #define ONENAND_HAS_2PLANE		(0x0004)
154 #define ONENAND_HAS_4KB_PAGE            (0x0008)
155 #define ONENAND_RUNTIME_BADBLOCK_CHECK	(0x0200)
156 #define ONENAND_PAGEBUF_ALLOC		(0x1000)
157 #define ONENAND_OOBBUF_ALLOC		(0x2000)
158 
159 /*
160  * OneNAND Flash Manufacturer ID Codes
161  */
162 #define ONENAND_MFR_NUMONYX	0x20
163 #define ONENAND_MFR_SAMSUNG	0xec
164 
165 /**
166  * struct nand_manufacturers - NAND Flash Manufacturer ID Structure
167  * @param name:		Manufacturer name
168  * @param id:		manufacturer ID code of device.
169 */
170 struct onenand_manufacturers {
171 	int id;
172 	char *name;
173 };
174 
175 int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
176 			struct mtd_oob_ops *ops);
177 
178 unsigned int onenand_block(struct onenand_chip *this, loff_t addr);
179 int flexonenand_region(struct mtd_info *mtd, loff_t addr);
180 #endif				/* __LINUX_MTD_ONENAND_H */
181