1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*
* linux/include/linux/mtd/onenand.h
*
* Copyright (C) 2005 Samsung Electronics
* Kyungmin Park <kyungmin.park@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __LINUX_MTD_ONENAND_H
#define __LINUX_MTD_ONENAND_H
#include <linux/spinlock.h>
#include <linux/mtd/onenand_regs.h>
#include <linux/mtd/bbm.h>
#define MAX_BUFFERRAM 2
#define MAX_ONENAND_PAGESIZE (2048 + 64)
/* Scan and identify a OneNAND device */
extern int onenand_scan(struct mtd_info *mtd, int max_chips);
/* Free resources held by the OneNAND device */
extern void onenand_release(struct mtd_info *mtd);
/**
* onenand_state_t - chip states
* Enumeration for OneNAND flash chip state
*/
typedef enum {
FL_READY,
FL_READING,
FL_WRITING,
FL_ERASING,
FL_SYNCING,
FL_UNLOCKING,
FL_LOCKING,
} onenand_state_t;
/**
* struct onenand_bufferram - OneNAND BufferRAM Data
* @param block block address in BufferRAM
* @param page page address in BufferRAM
* @param valid valid flag
*/
struct onenand_bufferram {
int block;
int page;
int valid;
};
/**
* struct onenand_chip - OneNAND Private Flash Chip Data
* @param base [BOARDSPECIFIC] address to access OneNAND
* @param chipsize [INTERN] the size of one chip for multichip arrays
* @param device_id [INTERN] device ID
* @param verstion_id [INTERN] version ID
* @param options [BOARDSPECIFIC] various chip options. They can partly be set to inform onenand_scan about
* @param erase_shift [INTERN] number of address bits in a block
* @param page_shift [INTERN] number of address bits in a page
* @param ppb_shift [INTERN] number of address bits in a pages per block
* @param page_mask [INTERN] a page per block mask
* @param bufferam_index [INTERN] BufferRAM index
* @param bufferam [INTERN] BufferRAM info
* @param readw [REPLACEABLE] hardware specific function for read short
* @param writew [REPLACEABLE] hardware specific function for write short
* @param command [REPLACEABLE] hardware specific function for writing commands to the chip
* @param wait [REPLACEABLE] hardware specific function for wait on ready
* @param read_bufferram [REPLACEABLE] hardware specific function for BufferRAM Area
* @param write_bufferram [REPLACEABLE] hardware specific function for BufferRAM Area
* @param read_word [REPLACEABLE] hardware specific function for read register of OneNAND
* @param write_word [REPLACEABLE] hardware specific function for write register of OneNAND
* @param scan_bbt [REPLACEALBE] hardware specific function for scaning Bad block Table
* @param chip_lock [INTERN] spinlock used to protect access to this structure and the chip
* @param wq [INTERN] wait queue to sleep on if a OneNAND operation is in progress
* @param state [INTERN] the current state of the OneNAND device
* @param autooob [REPLACEABLE] the default (auto)placement scheme
* @param bbm [REPLACEABLE] pointer to Bad Block Management
* @param priv [OPTIONAL] pointer to private chip date
*/
struct onenand_chip {
void __iomem *base;
unsigned int chipsize;
unsigned int device_id;
unsigned int options;
unsigned int erase_shift;
unsigned int page_shift;
unsigned int ppb_shift; /* Pages per block shift */
unsigned int page_mask;
unsigned int bufferram_index;
struct onenand_bufferram bufferram[MAX_BUFFERRAM];
int (*command)(struct mtd_info *mtd, int cmd, loff_t address, size_t len);
int (*wait)(struct mtd_info *mtd, int state);
int (*read_bufferram)(struct mtd_info *mtd, int area,
unsigned char *buffer, int offset, size_t count);
int (*write_bufferram)(struct mtd_info *mtd, int area,
const unsigned char *buffer, int offset, size_t count);
unsigned short (*read_word)(void __iomem *addr);
void (*write_word)(unsigned short value, void __iomem *addr);
void (*mmcontrol)(struct mtd_info *mtd, int sync_read);
int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
int (*scan_bbt)(struct mtd_info *mtd);
spinlock_t chip_lock;
wait_queue_head_t wq;
onenand_state_t state;
struct nand_oobinfo *autooob;
void *bbm;
void *priv;
};
/*
* Helper macros
*/
#define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index)
#define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1)
#define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1)
#define ONENAND_GET_SYS_CFG1(this) \
(this->read_word(this->base + ONENAND_REG_SYS_CFG1))
#define ONENAND_SET_SYS_CFG1(v, this) \
(this->write_word(v, this->base + ONENAND_REG_SYS_CFG1))
/*
* Options bits
*/
#define ONENAND_CONT_LOCK (0x0001)
/*
* OneNAND Flash Manufacturer ID Codes
*/
#define ONENAND_MFR_SAMSUNG 0xec
#define ONENAND_MFR_UNKNOWN 0x00
/**
* struct nand_manufacturers - NAND Flash Manufacturer ID Structure
* @param name: Manufacturer name
* @param id: manufacturer ID code of device.
*/
struct onenand_manufacturers {
int id;
char *name;
};
#endif /* __LINUX_MTD_ONENAND_H */
|
