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
|
/*
* mass storage transport protocols and subclasses,
* from usb mass storage class specification overview rev 1.2
*/
typedef struct Umsc Umsc;
typedef struct Ums Ums;
typedef struct Cbw Cbw; /* command block wrapper */
typedef struct Csw Csw; /* command status wrapper */
enum
{
Protocbi = 0, /* control/bulk/interrupt; mainly floppies */
Protocb = 1, /* " with no interrupt; mainly floppies */
Protobulk = 0x50, /* bulk only */
Subrbc = 1, /* reduced blk cmds */
Subatapi = 2, /* cd/dvd using sff-8020i or mmc-2 cmd blks */
Subqic = 3, /* QIC-157 tapes */
Subufi = 4, /* floppy */
Sub8070 = 5, /* removable media, atapi-like */
Subscsi = 6, /* scsi transparent cmd set */
Subisd200 = 7, /* ISD200 ATA */
Subdev = 0xff, /* use device's value */
Umsreset = 0xFF,
Getmaxlun = 0xFE,
// Maxlun = 256,
Maxlun = 32,
CMreset = 1,
Pcmd = 0,
Pdata,
Pstatus,
CbwLen = 31,
CbwDataIn = 0x80,
CbwDataOut = 0x00,
CswLen = 13,
CswOk = 0,
CswFailed = 1,
CswPhaseErr = 2,
};
/*
* corresponds to a lun.
* these are ~600+Maxiosize bytes each; ScsiReq is not tiny.
*/
struct Umsc
{
ScsiReq;
uvlong blocks;
vlong capacity;
/* from setup */
char *bufp;
long off; /* offset within a block */
long nb; /* byte count */
uchar rawcmd[10];
uchar phase;
char *inq;
Ums *ums;
Usbfs fs;
char buf[Maxiosize];
};
struct Ums
{
QLock;
Dev *dev;
Dev *epin;
Dev *epout;
Umsc *lun;
uchar maxlun;
int seq;
int nerrs;
int wrongresidues;
};
/*
* USB transparent SCSI devices
*/
struct Cbw
{
char signature[4]; /* "USBC" */
long tag;
long datalen;
uchar flags;
uchar lun;
uchar len;
char command[16];
};
struct Csw
{
char signature[4]; /* "USBS" */
long tag;
long dataresidue;
uchar status;
};
int diskmain(Dev*, int, char**);
|
