2 * Linux driver for Disk-On-Chip devices
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
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.
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.
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
25 #ifndef __MTD_DOC2000_H__
26 #define __MTD_DOC2000_H__
28 #include <linux/mtd/mtd.h>
29 #include <linux/mutex.h>
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
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
57 #define DoC_Mil_CDSN_IO 0x0800
58 #define DoC_2k_CDSN_IO 0x1800
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
89 /* How to access the device?
90 * On ARM, it'll be mmap'd directly with 32-bit wide accesses.
91 * On PPC, it's mmap'd and 16-bit wide.
92 * Others use readb/writeb
95 static inline u8 ReadDOC_(u32 __iomem *addr, unsigned long reg)
97 return __raw_readl(addr + reg);
99 static inline void WriteDOC_(u8 data, u32 __iomem *addr, unsigned long reg)
101 __raw_writel(data, addr + reg);
104 #define DOC_IOREMAP_LEN 0x8000
105 #elif defined(__ppc__)
106 static inline u8 ReadDOC_(u16 __iomem *addr, unsigned long reg)
108 return __raw_readw(addr + reg);
110 static inline void WriteDOC_(u8 data, u16 __iomem *addr, unsigned long reg)
112 __raw_writew(data, addr + reg);
115 #define DOC_IOREMAP_LEN 0x4000
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
123 #if defined(__i386__) || defined(__x86_64__)
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)
131 #define DOC_MODE_RESET 0
132 #define DOC_MODE_NORMAL 1
133 #define DOC_MODE_RESERVED1 2
134 #define DOC_MODE_RESERVED2 3
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
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
147 #define CDSN_CTRL_FR_B 0x80
148 #define CDSN_CTRL_FR_B0 0x40
149 #define CDSN_CTRL_FR_B1 0x80
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
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
166 #define DOC_FLASH_CE 0x80
167 #define DOC_FLASH_WP 0x40
168 #define DOC_FLASH_BANK 0x02
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)
176 unsigned long curadr;
177 unsigned char curmode;
178 /* Also some erase/write/pipeline info when we get that far */
184 #define MAX_FLOORS_MIL 1
185 #define MAX_CHIPS_MIL 1
187 #define MAX_FLOORS_MPLUS 2
188 #define MAX_CHIPS_MPLUS 1
190 #define ADDR_COLUMN 1
192 #define ADDR_COLUMN_PAGE 3
195 unsigned long physadr;
196 void __iomem *virtadr;
197 unsigned long totlen;
198 unsigned char ChipID; /* Type of DiskOnChip */
201 unsigned long mfr; /* Flash IDs - only one type of flash per device */
206 char interleave; /* Internal interleaving - Millennium Plus style */
207 unsigned long erasesize;
214 struct mtd_info *nextdoc;
218 int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);
220 #endif /* __MTD_DOC2000_H__ */