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61ecfa87 | 1 | /* |
1da177e4 LT |
2 | * Linux driver for Disk-On-Chip devices |
3 | * | |
a1452a37 DW |
4 | * Copyright © 1999 Machine Vision Holdings, Inc. |
5 | * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> | |
6 | * Copyright © 2002-2003 Greg Ungerer <gerg@snapgear.com> | |
7 | * Copyright © 2002-2003 SnapGear Inc | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 22 | * |
1da177e4 LT |
23 | */ |
24 | ||
25 | #ifndef __MTD_DOC2000_H__ | |
26 | #define __MTD_DOC2000_H__ | |
27 | ||
28 | #include <linux/mtd/mtd.h> | |
48b19268 | 29 | #include <linux/mutex.h> |
1da177e4 LT |
30 | |
31 | #define DoC_Sig1 0 | |
32 | #define DoC_Sig2 1 | |
33 | ||
34 | #define DoC_ChipID 0x1000 | |
35 | #define DoC_DOCStatus 0x1001 | |
36 | #define DoC_DOCControl 0x1002 | |
37 | #define DoC_FloorSelect 0x1003 | |
38 | #define DoC_CDSNControl 0x1004 | |
39 | #define DoC_CDSNDeviceSelect 0x1005 | |
40 | #define DoC_ECCConf 0x1006 | |
41 | #define DoC_2k_ECCStatus 0x1007 | |
42 | ||
43 | #define DoC_CDSNSlowIO 0x100d | |
44 | #define DoC_ECCSyndrome0 0x1010 | |
45 | #define DoC_ECCSyndrome1 0x1011 | |
46 | #define DoC_ECCSyndrome2 0x1012 | |
47 | #define DoC_ECCSyndrome3 0x1013 | |
48 | #define DoC_ECCSyndrome4 0x1014 | |
49 | #define DoC_ECCSyndrome5 0x1015 | |
50 | #define DoC_AliasResolution 0x101b | |
51 | #define DoC_ConfigInput 0x101c | |
52 | #define DoC_ReadPipeInit 0x101d | |
53 | #define DoC_WritePipeTerm 0x101e | |
54 | #define DoC_LastDataRead 0x101f | |
55 | #define DoC_NOP 0x1020 | |
56 | ||
57 | #define DoC_Mil_CDSN_IO 0x0800 | |
58 | #define DoC_2k_CDSN_IO 0x1800 | |
59 | ||
60 | #define DoC_Mplus_NOP 0x1002 | |
61 | #define DoC_Mplus_AliasResolution 0x1004 | |
62 | #define DoC_Mplus_DOCControl 0x1006 | |
63 | #define DoC_Mplus_AccessStatus 0x1008 | |
64 | #define DoC_Mplus_DeviceSelect 0x1008 | |
65 | #define DoC_Mplus_Configuration 0x100a | |
66 | #define DoC_Mplus_OutputControl 0x100c | |
67 | #define DoC_Mplus_FlashControl 0x1020 | |
68 | #define DoC_Mplus_FlashSelect 0x1022 | |
69 | #define DoC_Mplus_FlashCmd 0x1024 | |
70 | #define DoC_Mplus_FlashAddress 0x1026 | |
71 | #define DoC_Mplus_FlashData0 0x1028 | |
72 | #define DoC_Mplus_FlashData1 0x1029 | |
73 | #define DoC_Mplus_ReadPipeInit 0x102a | |
74 | #define DoC_Mplus_LastDataRead 0x102c | |
75 | #define DoC_Mplus_LastDataRead1 0x102d | |
76 | #define DoC_Mplus_WritePipeTerm 0x102e | |
77 | #define DoC_Mplus_ECCSyndrome0 0x1040 | |
78 | #define DoC_Mplus_ECCSyndrome1 0x1041 | |
79 | #define DoC_Mplus_ECCSyndrome2 0x1042 | |
80 | #define DoC_Mplus_ECCSyndrome3 0x1043 | |
81 | #define DoC_Mplus_ECCSyndrome4 0x1044 | |
82 | #define DoC_Mplus_ECCSyndrome5 0x1045 | |
83 | #define DoC_Mplus_ECCConf 0x1046 | |
84 | #define DoC_Mplus_Toggle 0x1046 | |
85 | #define DoC_Mplus_DownloadStatus 0x1074 | |
86 | #define DoC_Mplus_CtrlConfirm 0x1076 | |
87 | #define DoC_Mplus_Power 0x1fff | |
88 | ||
61ecfa87 TG |
89 | /* How to access the device? |
90 | * On ARM, it'll be mmap'd directly with 32-bit wide accesses. | |
1da177e4 | 91 | * On PPC, it's mmap'd and 16-bit wide. |
61ecfa87 | 92 | * Others use readb/writeb |
1da177e4 LT |
93 | */ |
94 | #if defined(__arm__) | |
d611d41b AB |
95 | static inline u8 ReadDOC_(u32 __iomem *addr, unsigned long reg) |
96 | { | |
97 | return __raw_readl(addr + reg); | |
98 | } | |
99 | static inline void WriteDOC_(u8 data, u32 __iomem *addr, unsigned long reg) | |
100 | { | |
101 | __raw_writel(data, addr + reg); | |
102 | wmb(); | |
103 | } | |
1da177e4 LT |
104 | #define DOC_IOREMAP_LEN 0x8000 |
105 | #elif defined(__ppc__) | |
d611d41b AB |
106 | static inline u8 ReadDOC_(u16 __iomem *addr, unsigned long reg) |
107 | { | |
108 | return __raw_readw(addr + reg); | |
109 | } | |
110 | static inline void WriteDOC_(u8 data, u16 __iomem *addr, unsigned long reg) | |
111 | { | |
112 | __raw_writew(data, addr + reg); | |
113 | wmb(); | |
114 | } | |
1da177e4 LT |
115 | #define DOC_IOREMAP_LEN 0x4000 |
116 | #else | |
117 | #define ReadDOC_(adr, reg) readb((void __iomem *)(adr) + (reg)) | |
118 | #define WriteDOC_(d, adr, reg) writeb(d, (void __iomem *)(adr) + (reg)) | |
119 | #define DOC_IOREMAP_LEN 0x2000 | |
120 | ||
121 | #endif | |
122 | ||
123 | #if defined(__i386__) || defined(__x86_64__) | |
124 | #define USE_MEMCPY | |
125 | #endif | |
126 | ||
127 | /* These are provided to directly use the DoC_xxx defines */ | |
128 | #define ReadDOC(adr, reg) ReadDOC_(adr,DoC_##reg) | |
129 | #define WriteDOC(d, adr, reg) WriteDOC_(d,adr,DoC_##reg) | |
130 | ||
131 | #define DOC_MODE_RESET 0 | |
132 | #define DOC_MODE_NORMAL 1 | |
133 | #define DOC_MODE_RESERVED1 2 | |
134 | #define DOC_MODE_RESERVED2 3 | |
135 | ||
136 | #define DOC_MODE_CLR_ERR 0x80 | |
137 | #define DOC_MODE_RST_LAT 0x10 | |
138 | #define DOC_MODE_BDECT 0x08 | |
139 | #define DOC_MODE_MDWREN 0x04 | |
140 | ||
141 | #define DOC_ChipID_Doc2k 0x20 | |
142 | #define DOC_ChipID_Doc2kTSOP 0x21 /* internal number for MTD */ | |
143 | #define DOC_ChipID_DocMil 0x30 | |
144 | #define DOC_ChipID_DocMilPlus32 0x40 | |
145 | #define DOC_ChipID_DocMilPlus16 0x41 | |
146 | ||
147 | #define CDSN_CTRL_FR_B 0x80 | |
148 | #define CDSN_CTRL_FR_B0 0x40 | |
149 | #define CDSN_CTRL_FR_B1 0x80 | |
150 | ||
151 | #define CDSN_CTRL_ECC_IO 0x20 | |
152 | #define CDSN_CTRL_FLASH_IO 0x10 | |
153 | #define CDSN_CTRL_WP 0x08 | |
154 | #define CDSN_CTRL_ALE 0x04 | |
155 | #define CDSN_CTRL_CLE 0x02 | |
156 | #define CDSN_CTRL_CE 0x01 | |
157 | ||
158 | #define DOC_ECC_RESET 0 | |
159 | #define DOC_ECC_ERROR 0x80 | |
160 | #define DOC_ECC_RW 0x20 | |
161 | #define DOC_ECC__EN 0x08 | |
162 | #define DOC_TOGGLE_BIT 0x04 | |
163 | #define DOC_ECC_RESV 0x02 | |
164 | #define DOC_ECC_IGNORE 0x01 | |
165 | ||
166 | #define DOC_FLASH_CE 0x80 | |
167 | #define DOC_FLASH_WP 0x40 | |
168 | #define DOC_FLASH_BANK 0x02 | |
169 | ||
170 | /* We have to also set the reserved bit 1 for enable */ | |
171 | #define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV) | |
172 | #define DOC_ECC_DIS (DOC_ECC_RESV) | |
173 | ||
174 | struct Nand { | |
175 | char floor, chip; | |
176 | unsigned long curadr; | |
177 | unsigned char curmode; | |
178 | /* Also some erase/write/pipeline info when we get that far */ | |
179 | }; | |
180 | ||
181 | #define MAX_FLOORS 4 | |
182 | #define MAX_CHIPS 4 | |
183 | ||
184 | #define MAX_FLOORS_MIL 1 | |
185 | #define MAX_CHIPS_MIL 1 | |
186 | ||
187 | #define MAX_FLOORS_MPLUS 2 | |
188 | #define MAX_CHIPS_MPLUS 1 | |
189 | ||
190 | #define ADDR_COLUMN 1 | |
191 | #define ADDR_PAGE 2 | |
192 | #define ADDR_COLUMN_PAGE 3 | |
193 | ||
194 | struct DiskOnChip { | |
195 | unsigned long physadr; | |
196 | void __iomem *virtadr; | |
197 | unsigned long totlen; | |
198 | unsigned char ChipID; /* Type of DiskOnChip */ | |
199 | int ioreg; | |
61ecfa87 | 200 | |
1da177e4 LT |
201 | unsigned long mfr; /* Flash IDs - only one type of flash per device */ |
202 | unsigned long id; | |
203 | int chipshift; | |
204 | char page256; | |
205 | char pageadrlen; | |
206 | char interleave; /* Internal interleaving - Millennium Plus style */ | |
207 | unsigned long erasesize; | |
61ecfa87 | 208 | |
1da177e4 LT |
209 | int curfloor; |
210 | int curchip; | |
61ecfa87 | 211 | |
1da177e4 LT |
212 | int numchips; |
213 | struct Nand *chips; | |
214 | struct mtd_info *nextdoc; | |
48b19268 | 215 | struct mutex lock; |
1da177e4 LT |
216 | }; |
217 | ||
218 | int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]); | |
219 | ||
220 | #endif /* __MTD_DOC2000_H__ */ |