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
|
/* $OpenBSD: flashvar.h,v 1.2 2007/06/20 18:15:46 deraadt Exp $ */
/*
* Copyright (c) 2005 Uwe Stuehler <uwe@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _FLASHVAR_H_
#define _FLASHVAR_H_
#ifdef _KERNEL
/* Flash controller descriptor structure */
struct flash_ctl_tag {
u_int8_t (*reg8_read)(void *, int);
int (*regx_read_page)(void *, caddr_t, caddr_t);
void (*reg8_write)(void *, int, u_int8_t);
int (*regx_write_page)(void *, caddr_t, caddr_t);
void (*default_disklabel)(void *, dev_t, struct disklabel *);
int (*safe_strategy)(void *, struct buf *);
};
/*
* Pseudo-registers for a fictitious flash controller
*
* Note that logical levels are assumed for CE and WP bits.
* Signals corresponding to these bits are usually negated.
*/
#define FLASH_REG_DATA 0x00
#define FLASH_REG_COL 0x01
#define FLASH_REG_ROW 0x02
#define FLASH_REG_CMD 0x03
#define FLASH_REG_ALE 0x04
#define FLASH_REG_CLE 0x05
#define FLASH_REG_CE 0x06
#define FLASH_REG_WP 0x07
#define FLASH_REG_READY 0x0f
/* Flash device descriptor structure */
struct flashdev {
u_int16_t id;
const char *longname;
u_long pagesize; /* bytes per page */
u_long oobsize; /* OOB bytes per page */
u_long blkpages; /* pages per erasable block */
u_long capacity; /* pages per device */
};
#define FLASH_DEVICE(v,d) ((FLASH_VENDOR_##v << 8) | (d))
/* Flash device vendors */
#define FLASH_VENDOR_SAMSUNG 0xec
/* Flash devices */
#define FLASH_DEVICE_SAMSUNG_K9F2808U0C FLASH_DEVICE(SAMSUNG, 0x73)
#define FLASH_DEVICE_SAMSUNG_K9F1G08U0A FLASH_DEVICE(SAMSUNG, 0xf1)
/* Maximum sizes for all devices */
#define FLASH_MAXPAGESIZE 2048
#define FLASH_MAXOOBSIZE 64
/*
* Should-be private softc structure for the generic flash driver.
*/
struct flash_softc {
struct device sc_dev;
/* Disk device information */
struct disk sc_dk;
struct buf sc_q;
struct buf *sc_bp;
int sc_flags;
/* Flash controller tag */
struct flash_ctl_tag *sc_tag;
void *sc_cookie;
/* Flash device characteristics */
const struct flashdev *sc_flashdev;
int sc_maxwaitready;
int sc_maxwaitcomplete;
};
/* Values for sc_flags */
#define FDK_LOADED 0x00000001
#define FDK_SAFE 0x00000002
/*
* Similar to vnd(4) devices there are two kinds of flash devices.
* Both device kinds share the same disklabel.
*
* ``Safe'' devices have bit 11 set in the minor number and use the
* out-of-band page data to implement wear-leveling and transparent
* management of bad block information. Block erasing and rewriting
* is also handled transparently; arbitrary pages can be modified.
*
* ``Unsafe'' devices provide raw access to the flash pages. Access
* to OOB page data is possible via ioctl()s only with these devices.
* Erasing the containing flash block may be necessary before a page
* can be writting successfully, but the block erase command is only
* provided as an ioctl().
*/
#define flashsafe(x) (minor(x) & 0x800)
#define flashunit(x) DISKUNIT(makedev(major(x), minor(x) & 0x7ff))
#define flashpart(x) DISKPART(makedev(major(x), minor(x) & 0x7ff))
#define flashlabeldev(x) (MAKEDISKDEV(major(x), flashunit(x), RAW_PART)\
|flashsafe(x))
void flashattach(struct flash_softc *, struct flash_ctl_tag *, void *);
int flashdetach(struct device *, int);
int flashactivate(struct device *, enum devact);
u_int8_t flash_reg8_read(struct flash_softc *, int);
void flash_reg8_read_page(struct flash_softc *, caddr_t, caddr_t);
void flash_reg8_write(struct flash_softc *, int, u_int8_t);
void flash_reg8_write_page(struct flash_softc *, caddr_t, caddr_t);
void flash_chip_enable(struct flash_softc *);
void flash_chip_disable(struct flash_softc *);
int flash_chip_reset(struct flash_softc *);
int flash_chip_identify(struct flash_softc *, u_int8_t *, u_int8_t *);
int flash_chip_erase_block(struct flash_softc *, long);
int flash_chip_read_block(struct flash_softc *, long, caddr_t);
int flash_chip_read_page(struct flash_softc *, long, caddr_t, caddr_t);
int flash_chip_read_oob(struct flash_softc *, long, caddr_t);
int flash_chip_write_block(struct flash_softc *, long, caddr_t, caddr_t);
int flash_chip_write_page(struct flash_softc *, long, caddr_t, caddr_t);
int flash_chip_verify_block(struct flash_softc *, long, caddr_t, caddr_t);
int flash_chip_verify_page(struct flash_softc *, long, caddr_t, caddr_t);
#endif /* _KERNEL */
/* XXX: define ioctl commands for OOB page data access and block erase. */
#endif /* _FLASHVAR_H_ */
|
