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cd5f6346 KP |
1 | /* |
2 | * linux/include/linux/mtd/onenand.h | |
3 | * | |
75384b0d | 4 | * Copyright (C) 2005-2007 Samsung Electronics |
cd5f6346 KP |
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/spinlock.h> | |
2c22120f | 16 | #include <linux/completion.h> |
cd5f6346 | 17 | #include <linux/mtd/onenand_regs.h> |
cdc00130 | 18 | #include <linux/mtd/bbm.h> |
cd5f6346 KP |
19 | |
20 | #define MAX_BUFFERRAM 2 | |
21 | ||
22 | /* Scan and identify a OneNAND device */ | |
23 | extern int onenand_scan(struct mtd_info *mtd, int max_chips); | |
24 | /* Free resources held by the OneNAND device */ | |
25 | extern void onenand_release(struct mtd_info *mtd); | |
26 | ||
ea9b6dcc | 27 | /* |
cd5f6346 KP |
28 | * onenand_state_t - chip states |
29 | * Enumeration for OneNAND flash chip state | |
30 | */ | |
31 | typedef enum { | |
32 | FL_READY, | |
33 | FL_READING, | |
34 | FL_WRITING, | |
35 | FL_ERASING, | |
36 | FL_SYNCING, | |
cd5f6346 | 37 | FL_LOCKING, |
493c6460 KP |
38 | FL_RESETING, |
39 | FL_OTPING, | |
a41371eb | 40 | FL_PM_SUSPENDED, |
cd5f6346 KP |
41 | } onenand_state_t; |
42 | ||
43 | /** | |
44 | * struct onenand_bufferram - OneNAND BufferRAM Data | |
ea9b6dcc RD |
45 | * @block: block address in BufferRAM |
46 | * @page: page address in BufferRAM | |
47 | * @valid: valid flag | |
cd5f6346 KP |
48 | */ |
49 | struct onenand_bufferram { | |
50 | int block; | |
51 | int page; | |
52 | int valid; | |
53 | }; | |
54 | ||
55 | /** | |
56 | * struct onenand_chip - OneNAND Private Flash Chip Data | |
ea9b6dcc RD |
57 | * @base: [BOARDSPECIFIC] address to access OneNAND |
58 | * @chipsize: [INTERN] the size of one chip for multichip arrays | |
59 | * @device_id: [INTERN] device ID | |
60 | * @density_mask: chip density, used for DDP devices | |
61 | * @verstion_id: [INTERN] version ID | |
62 | * @options: [BOARDSPECIFIC] various chip options. They can | |
63 | * partly be set to inform onenand_scan about | |
64 | * @erase_shift: [INTERN] number of address bits in a block | |
65 | * @page_shift: [INTERN] number of address bits in a page | |
ea9b6dcc RD |
66 | * @page_mask: [INTERN] a page per block mask |
67 | * @bufferram_index: [INTERN] BufferRAM index | |
68 | * @bufferram: [INTERN] BufferRAM info | |
69 | * @readw: [REPLACEABLE] hardware specific function for read short | |
70 | * @writew: [REPLACEABLE] hardware specific function for write short | |
71 | * @command: [REPLACEABLE] hardware specific function for writing | |
72 | * commands to the chip | |
73 | * @wait: [REPLACEABLE] hardware specific function for wait on ready | |
74 | * @read_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area | |
75 | * @write_bufferram: [REPLACEABLE] hardware specific function for BufferRAM Area | |
76 | * @read_word: [REPLACEABLE] hardware specific function for read | |
77 | * register of OneNAND | |
78 | * @write_word: [REPLACEABLE] hardware specific function for write | |
79 | * register of OneNAND | |
80 | * @mmcontrol: sync burst read function | |
81 | * @block_markbad: function to mark a block as bad | |
82 | * @scan_bbt: [REPLACEALBE] hardware specific function for scanning | |
83 | * Bad block Table | |
84 | * @chip_lock: [INTERN] spinlock used to protect access to this | |
85 | * structure and the chip | |
86 | * @wq: [INTERN] wait queue to sleep on if a OneNAND | |
87 | * operation is in progress | |
88 | * @state: [INTERN] the current state of the OneNAND device | |
89 | * @page_buf: data buffer | |
60d84f97 | 90 | * @subpagesize: [INTERN] holds the subpagesize |
ea9b6dcc RD |
91 | * @ecclayout: [REPLACEABLE] the default ecc placement scheme |
92 | * @bbm: [REPLACEABLE] pointer to Bad Block Management | |
93 | * @priv: [OPTIONAL] pointer to private chip date | |
cd5f6346 KP |
94 | */ |
95 | struct onenand_chip { | |
96 | void __iomem *base; | |
97 | unsigned int chipsize; | |
98 | unsigned int device_id; | |
28b79ff9 | 99 | unsigned int version_id; |
83a36838 | 100 | unsigned int density_mask; |
cd5f6346 KP |
101 | unsigned int options; |
102 | ||
103 | unsigned int erase_shift; | |
104 | unsigned int page_shift; | |
cd5f6346 KP |
105 | unsigned int page_mask; |
106 | ||
107 | unsigned int bufferram_index; | |
108 | struct onenand_bufferram bufferram[MAX_BUFFERRAM]; | |
109 | ||
110 | int (*command)(struct mtd_info *mtd, int cmd, loff_t address, size_t len); | |
111 | int (*wait)(struct mtd_info *mtd, int state); | |
112 | int (*read_bufferram)(struct mtd_info *mtd, int area, | |
113 | unsigned char *buffer, int offset, size_t count); | |
114 | int (*write_bufferram)(struct mtd_info *mtd, int area, | |
115 | const unsigned char *buffer, int offset, size_t count); | |
116 | unsigned short (*read_word)(void __iomem *addr); | |
117 | void (*write_word)(unsigned short value, void __iomem *addr); | |
52b0eea7 | 118 | void (*mmcontrol)(struct mtd_info *mtd, int sync_read); |
cdc00130 KP |
119 | int (*block_markbad)(struct mtd_info *mtd, loff_t ofs); |
120 | int (*scan_bbt)(struct mtd_info *mtd); | |
cd5f6346 | 121 | |
2c22120f KP |
122 | struct completion complete; |
123 | int irq; | |
124 | ||
cd5f6346 KP |
125 | spinlock_t chip_lock; |
126 | wait_queue_head_t wq; | |
127 | onenand_state_t state; | |
532a37cf | 128 | unsigned char *page_buf; |
cd5f6346 | 129 | |
60d84f97 | 130 | int subpagesize; |
5bd34c09 | 131 | struct nand_ecclayout *ecclayout; |
cd5f6346 | 132 | |
5bd34c09 | 133 | void *bbm; |
cdc00130 | 134 | |
cd5f6346 KP |
135 | void *priv; |
136 | }; | |
137 | ||
fcc31470 KP |
138 | /* |
139 | * Helper macros | |
140 | */ | |
cd5f6346 KP |
141 | #define ONENAND_CURRENT_BUFFERRAM(this) (this->bufferram_index) |
142 | #define ONENAND_NEXT_BUFFERRAM(this) (this->bufferram_index ^ 1) | |
143 | #define ONENAND_SET_NEXT_BUFFERRAM(this) (this->bufferram_index ^= 1) | |
a8de85d5 | 144 | #define ONENAND_SET_PREV_BUFFERRAM(this) (this->bufferram_index ^= 1) |
cd5f6346 | 145 | |
fcc31470 KP |
146 | #define ONENAND_GET_SYS_CFG1(this) \ |
147 | (this->read_word(this->base + ONENAND_REG_SYS_CFG1)) | |
148 | #define ONENAND_SET_SYS_CFG1(v, this) \ | |
149 | (this->write_word(v, this->base + ONENAND_REG_SYS_CFG1)) | |
150 | ||
738d61f5 KP |
151 | #define ONENAND_IS_DDP(this) \ |
152 | (this->device_id & ONENAND_DEVICE_IS_DDP) | |
153 | ||
9c01f87d KP |
154 | /* Check byte access in OneNAND */ |
155 | #define ONENAND_CHECK_BYTE_ACCESS(addr) (addr & 0x1) | |
156 | ||
cd5f6346 KP |
157 | /* |
158 | * Options bits | |
159 | */ | |
28b79ff9 KP |
160 | #define ONENAND_HAS_CONT_LOCK (0x0001) |
161 | #define ONENAND_HAS_UNLOCK_ALL (0x0002) | |
532a37cf | 162 | #define ONENAND_PAGEBUF_ALLOC (0x1000) |
cd5f6346 KP |
163 | |
164 | /* | |
165 | * OneNAND Flash Manufacturer ID Codes | |
166 | */ | |
167 | #define ONENAND_MFR_SAMSUNG 0xec | |
cd5f6346 KP |
168 | |
169 | /** | |
ea9b6dcc RD |
170 | * struct onenand_manufacturers - NAND Flash Manufacturer ID Structure |
171 | * @name: Manufacturer name | |
172 | * @id: manufacturer ID code of device. | |
cd5f6346 KP |
173 | */ |
174 | struct onenand_manufacturers { | |
175 | int id; | |
176 | char *name; | |
177 | }; | |
178 | ||
179 | #endif /* __LINUX_MTD_ONENAND_H */ |