summaryrefslogtreecommitdiff
path: root/include/linux/mtd/doc2000.h
blob: ebf9a7692418c16edb003776b00c78e243a3ae2c (plain)
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
/* Linux driver for Disk-On-Chip 2000       */
/* (c) 1999 Machine Vision Holdings, Inc.   */
/* Author: David Woodhouse <dwmw2@mvhi.com> */
/* $Id: doc2000.h,v 1.15 2001/09/19 00:22:15 dwmw2 Exp $ */

#ifndef __MTD_DOC2000_H__
#define __MTD_DOC2000_H__

struct DiskOnChip;

#include <linux/mtd/nftl.h>

#define DoC_Sig1 0
#define DoC_Sig2 1

#define DoC_ChipID		0x1000
#define DoC_DOCStatus		0x1001
#define DoC_DOCControl		0x1002
#define DoC_FloorSelect		0x1003
#define DoC_CDSNControl		0x1004
#define DoC_CDSNDeviceSelect 	0x1005
#define DoC_ECCConf 		0x1006
#define DoC_2k_ECCStatus	0x1007

#define DoC_CDSNSlowIO		0x100d
#define DoC_ECCSyndrome0	0x1010
#define DoC_ECCSyndrome1	0x1011
#define DoC_ECCSyndrome2	0x1012
#define DoC_ECCSyndrome3	0x1013
#define DoC_ECCSyndrome4	0x1014
#define DoC_ECCSyndrome5	0x1015
#define DoC_AliasResolution 	0x101b
#define DoC_ConfigInput		0x101c
#define DoC_ReadPipeInit 	0x101d
#define DoC_WritePipeTerm 	0x101e
#define DoC_LastDataRead 	0x101f
#define DoC_NOP 		0x1020

#define DoC_Mil_CDSN_IO 	0x0800
#define DoC_2k_CDSN_IO 		0x1800

#define ReadDOC_(adr, reg)      ((volatile unsigned char)(*(volatile __u8 *)(((unsigned long)adr)+((reg)))))
#define WriteDOC_(d, adr, reg)  do{ *(volatile __u8 *)(((unsigned long)adr)+((reg))) = (__u8)d; eieio();} while(0)

#define DOC_IOREMAP_LEN		0x4000

/* These are provided to directly use the DoC_xxx defines */
#define ReadDOC(adr, reg)      ReadDOC_(adr,DoC_##reg)
#define WriteDOC(d, adr, reg)  WriteDOC_(d,adr,DoC_##reg)

#define DOC_MODE_RESET 		0
#define DOC_MODE_NORMAL 	1
#define DOC_MODE_RESERVED1 	2
#define DOC_MODE_RESERVED2 	3

#define DOC_MODE_MDWREN 	4
#define DOC_MODE_CLR_ERR 	0x80

#define DOC_ChipID_UNKNOWN 	0x00
#define DOC_ChipID_Doc2k 	0x20
#define DOC_ChipID_DocMil 	0x30

#define CDSN_CTRL_FR_B 		0x80
#define CDSN_CTRL_ECC_IO 	0x20
#define CDSN_CTRL_FLASH_IO 	0x10
#define CDSN_CTRL_WP 		0x08
#define CDSN_CTRL_ALE 		0x04
#define CDSN_CTRL_CLE 		0x02
#define CDSN_CTRL_CE 		0x01

#define DOC_ECC_RESET 		0
#define DOC_ECC_ERROR 		0x80
#define DOC_ECC_RW 		0x20
#define DOC_ECC__EN 		0x08
#define DOC_TOGGLE_BIT 		0x04
#define DOC_ECC_RESV 		0x02
#define DOC_ECC_IGNORE		0x01

/* We have to also set the reserved bit 1 for enable */
#define DOC_ECC_EN (DOC_ECC__EN | DOC_ECC_RESV)
#define DOC_ECC_DIS (DOC_ECC_RESV)

#define MAX_FLOORS 4
#define MAX_CHIPS 4

#define MAX_FLOORS_MIL 4
#define MAX_CHIPS_MIL 1

#define ADDR_COLUMN 1
#define ADDR_PAGE 2
#define ADDR_COLUMN_PAGE 3

struct DiskOnChip {
	unsigned long physadr;
	unsigned long virtadr;
	unsigned long totlen;
	char* name;
	char ChipID; /* Type of DiskOnChip */
	int ioreg;

	char* chips_name;
	unsigned long mfr; /* Flash IDs - only one type of flash per device */
	unsigned long id;
	int chipshift;
	char page256;
	char pageadrlen;
	unsigned long erasesize;

	int curfloor;
	int curchip;

	int numchips;
	struct Nand *chips;

	int nftl_found;
	struct NFTLrecord nftl;
};

#define SECTORSIZE 512

/* Return codes from doc_write(), doc_read(), and doc_erase().
 */
#define DOC_OK		0
#define DOC_EIO		1
#define DOC_EINVAL	2
#define DOC_EECC	3
#define DOC_ETIMEOUT	4

/*
 * Function Prototypes
 */
int doc_decode_ecc(unsigned char sector[512], unsigned char ecc1[6]);

int doc_rw(struct DiskOnChip* this, int cmd, loff_t from, size_t len,
	   size_t *retlen, u_char *buf);
int doc_read_ecc(struct DiskOnChip* this, loff_t from, size_t len,
		 size_t *retlen, u_char *buf, u_char *eccbuf);
int doc_write_ecc(struct DiskOnChip* this, loff_t to, size_t len,
		  size_t *retlen, const u_char *buf, u_char *eccbuf);
int doc_read_oob(struct DiskOnChip* this, loff_t ofs, size_t len,
		 size_t *retlen, u_char *buf);
int doc_write_oob(struct DiskOnChip* this, loff_t ofs, size_t len,
		  size_t *retlen, const u_char *buf);
int doc_erase (struct DiskOnChip* this, loff_t ofs, size_t len);

void doc_probe(unsigned long physadr);

void doc_print(struct DiskOnChip*);

#endif /* __MTD_DOC2000_H__ */