1 /*
2 * Linux driver for Disk-On-Chip devices
3 *
4 * Copyright (C) 1999 Machine Vision Holdings, Inc.
5 * Copyright (C) 2001-2003 David Woodhouse <dwmw2@infradead.org>
6 * Copyright (C) 2002-2003 Greg Ungerer <gerg@snapgear.com>
7 * Copyright (C) 2002-2003 SnapGear Inc
8 *
9 * $Id: doc2000.h,v 1.24 2005/01/05 12:40:38 dwmw2 Exp $
10 *
11 * Released under GPL
12 */
13
14 #ifndef __MTD_DOC2000_H__
15 #define __MTD_DOC2000_H__
16
17 #include <linux/mtd/mtd.h>
18 #include <asm/semaphore.h>
19
20 #define DoC_Sig1 0
21 #define DoC_Sig2 1
22
23 #define DoC_ChipID 0x1000
24 #define DoC_DOCStatus 0x1001
25 #define DoC_DOCControl 0x1002
26 #define DoC_FloorSelect 0x1003
27 #define DoC_CDSNControl 0x1004
28 #define DoC_CDSNDeviceSelect 0x1005
29 #define DoC_ECCConf 0x1006
30 #define DoC_2k_ECCStatus 0x1007
31
32 #define DoC_CDSNSlowIO 0x100d
33 #define DoC_ECCSyndrome0 0x1010
34 #define DoC_ECCSyndrome1 0x1011
35 #define DoC_ECCSyndrome2 0x1012
36 #define DoC_ECCSyndrome3 0x1013
37 #define DoC_ECCSyndrome4 0x1014
38 #define DoC_ECCSyndrome5 0x1015
39 #define DoC_AliasResolution 0x101b
40 #define DoC_ConfigInput 0x101c
41 #define DoC_ReadPipeInit 0x101d
42 #define DoC_WritePipeTerm 0x101e
43 #define DoC_LastDataRead 0x101f
44 #define DoC_NOP 0x1020
45
46 #define DoC_Mil_CDSN_IO 0x0800
47 #define DoC_2k_CDSN_IO 0x1800
48
49 #define DoC_Mplus_NOP 0x1002
50 #define DoC_Mplus_AliasResolution 0x1004
51 #define DoC_Mplus_DOCControl 0x1006
52 #define DoC_Mplus_AccessStatus 0x1008
53 #define DoC_Mplus_DeviceSelect 0x1008
54 #define DoC_Mplus_Configuration 0x100a
55 #define DoC_Mplus_OutputControl 0x100c
56 #define DoC_Mplus_FlashControl 0x1020
57 #define DoC_Mplus_FlashSelect 0x1022
58 #define DoC_Mplus_FlashCmd 0x1024
59 #define DoC_Mplus_FlashAddress 0x1026
60 #define DoC_Mplus_FlashData0 0x1028
61 #define DoC_Mplus_FlashData1 0x1029
62 #define DoC_Mplus_ReadPipeInit 0x102a
63 #define DoC_Mplus_LastDataRead 0x102c
64 #define DoC_Mplus_LastDataRead1 0x102d
65 #define DoC_Mplus_WritePipeTerm 0x102e
66 #define DoC_Mplus_ECCSyndrome0 0x1040
67 #define DoC_Mplus_ECCSyndrome1 0x1041
68 #define DoC_Mplus_ECCSyndrome2 0x1042
69 #define DoC_Mplus_ECCSyndrome3 0x1043
70 #define DoC_Mplus_ECCSyndrome4 0x1044
71 #define DoC_Mplus_ECCSyndrome5 0x1045
72 #define DoC_Mplus_ECCConf 0x1046
73 #define DoC_Mplus_Toggle 0x1046
74 #define DoC_Mplus_DownloadStatus 0x1074
75 #define DoC_Mplus_CtrlConfirm 0x1076
76 #define DoC_Mplus_Power 0x1fff
77
78 /* How to access the device?
79 * On ARM, it'll be mmap'd directly with 32-bit wide accesses.
80 * On PPC, it's mmap'd and 16-bit wide.
81 * Others use readb/writeb
82 */
83 #if defined(__arm__)
84 #define ReadDOC_(adr, reg) ((unsigned char)(*(volatile __u32 *)(((unsigned long)adr)+((reg)<<2))))
85 #define WriteDOC_(d, adr, reg) do{ *(volatile __u32 *)(((unsigned long)adr)+((reg)<<2)) = (__u32)d; wmb();} while(0)
86 #define DOC_IOREMAP_LEN 0x8000
87 #elif defined(__ppc__)
88 #define ReadDOC_(adr, reg) ((unsigned char)(*(volatile __u16 *)(((unsigned long)adr)+((reg)<<1))))
89 #define WriteDOC_(d, adr, reg) do{ *(volatile __u16 *)(((unsigned long)adr)+((reg)<<1)) = (__u16)d; wmb();} while(0)
90 #define DOC_IOREMAP_LEN 0x4000
91 #else
92 #define ReadDOC_(adr, reg) readb((void __iomem *)(adr) + (reg))
93 #define WriteDOC_(d, adr, reg) writeb(d, (void __iomem *)(adr) + (reg))
94 #define DOC_IOREMAP_LEN 0x2000
95
96 #endif
97
98 #if defined(__i386__) || defined(__x86_64__)
99 #define USE_MEMCPY
100 #endif
101
102 /* These are provided to directly use the DoC_xxx defines */
103 #define ReadDOC(adr, reg) ReadDOC_(adr,DoC_##reg)
104 #define WriteDOC(d, adr, reg) WriteDOC_(d,adr,DoC_##reg)
105
106 #define DOC_MODE_RESET 0
107 #define DOC_MODE_NORMAL 1
108 #define DOC_MODE_RESERVED1 2
109 #define DOC_MODE_RESERVED2 3
110
111 #define DOC_MODE_CLR_ERR 0x80
112 #define DOC_MODE_RST_LAT 0x10
113 #define DOC_MODE_BDECT 0x08
114 #define DOC_MODE_MDWREN 0x04
115
116 #define DOC_ChipID_Doc2k 0x20
117 #define DOC_ChipID_Doc2kTSOP 0x21 /* internal number for MTD */
118 #define DOC_ChipID_DocMil 0x30
119 #define DOC_ChipID_DocMilPlus32 0x40
120 #define DOC_ChipID_DocMilPlus16 0x41
121
122 #define CDSN_CTRL_FR_B 0x80
123 #define CDSN_CTRL_FR_B0 0x40
124 #define CDSN_CTRL_FR_B1 0x80
125
126 #define CDSN_CTRL_ECC_IO 0x20
127 #define CDSN_CTRL_FLASH_IO 0x10
128 #define CDSN_CTRL_WP 0x08
129 #define CDSN_CTRL_ALE 0x04
130 #define CDSN_CTRL_CLE 0x02
131 #define CDSN_CTRL_CE 0x01
132
133 #define DOC_ECC_RESET 0
134 #define DOC_ECC_ERROR 0x80
135 #define DOC_ECC_RW 0x20
136 #define DOC_ECC__EN 0x08
137 #define DOC_TOGGLE_BIT 0x04
138 #define DOC_ECC_RESV 0x02
139 #define DOC_ECC_IGNORE 0x01
140
141 #define DOC_FLASH_CE 0x80
142 #define DOC_FLASH_WP 0x40
143 #define DOC_FLASH_BANK 0x02
144
145 /* We have to also set the reserved bit 1 for enable */
146 #define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV)
147 #define DOC_ECC_DIS (DOC_ECC_RESV)
148
149 struct Nand {
150 char floor, chip;
151 unsigned long curadr;
152 unsigned char curmode;
153 /* Also some erase/write/pipeline info when we get that far */
154 };
155
156 #define MAX_FLOORS 4
157 #define MAX_CHIPS 4
158
159 #define MAX_FLOORS_MIL 1
160 #define MAX_CHIPS_MIL 1
161
162 #define MAX_FLOORS_MPLUS 2
163 #define MAX_CHIPS_MPLUS 1
164
165 #define ADDR_COLUMN 1
166 #define ADDR_PAGE 2
167 #define ADDR_COLUMN_PAGE 3
168
169 struct DiskOnChip {
170 unsigned long physadr;
171 void __iomem *virtadr;
172 unsigned long totlen;
173 unsigned char ChipID; /* Type of DiskOnChip */
174 int ioreg;
175
176 unsigned long mfr; /* Flash IDs - only one type of flash per device */
177 unsigned long id;
178 int chipshift;
179 char page256;
180 char pageadrlen;
181 char interleave; /* Internal interleaving - Millennium Plus style */
182 unsigned long erasesize;
183
184 int curfloor;
185 int curchip;
186
187 int numchips;
188 struct Nand *chips;
189 struct mtd_info *nextdoc;
190 struct semaphore lock;
191 };
192
193 int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);
194
195 #endif /* __MTD_DOC2000_H__ */
196
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