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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/* Special Initializers for certain USB Mass Storage devices
*
* $Id: initializers.c,v 1.2 2000/09/06 22:35:57 mdharm Exp $
*
* Current development and maintenance by:
* (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
*
* This driver is based on the 'USB Mass Storage Class' document. This
* describes in detail the protocol used to communicate with such
* devices. Clearly, the designers had SCSI and ATAPI commands in
* mind when they created this document. The commands are all very
* similar to commands in the SCSI-II and ATAPI specifications.
*
* It is important to note that in a number of cases this class
* exhibits class-specific exemptions from the USB specification.
* Notably the usage of NAK, STALL and ACK differs from the norm, in
* that they are used to communicate wait, failed and OK on commands.
*
* Also, for certain devices, the interrupt endpoint is used to convey
* status of a command.
*
* Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
* information about this driver.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/sched.h>
#include <linux/errno.h>
#include "usb.h"
#include "initializers.h"
#include "debug.h"
#include "transport.h"
#define RIO_MSC 0x08
#define RIOP_INIT "RIOP\x00\x01\x08"
#define RIOP_INIT_LEN 7
#define RIO_SEND_LEN 40
#define RIO_RECV_LEN 0x200
/* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
* mode */
int usb_stor_euscsi_init(struct us_data *us)
{
int result;
US_DEBUGP("Attempting to init eUSCSI bridge...\n");
us->iobuf[0] = 0x1;
result = usb_stor_control_msg(us, us->send_ctrl_pipe,
0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
0x01, 0x0, us->iobuf, 0x1, 5*HZ);
US_DEBUGP("-- result is %d\n", result);
return 0;
}
/* This function is required to activate all four slots on the UCR-61S2B
* flash reader */
int usb_stor_ucr61s2b_init(struct us_data *us)
{
struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
int res, partial;
static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
US_DEBUGP("Sending UCR-61S2B initialization packet...\n");
bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
bcb->Tag = 0;
bcb->DataTransferLength = cpu_to_le32(0);
bcb->Flags = bcb->Lun = 0;
bcb->Length = sizeof(init_string) - 1;
memset(bcb->CDB, 0, sizeof(bcb->CDB));
memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
US_BULK_CB_WRAP_LEN, &partial);
if(res)
return res;
US_DEBUGP("Getting status packet...\n");
res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
US_BULK_CS_WRAP_LEN, &partial);
return (res ? -1 : 0);
}
/* Place the Rio Karma into mass storage mode.
*
* The initialization begins by sending 40 bytes starting
* RIOP\x00\x01\x08\x00, which the device will ack with a 512-byte
* packet with the high four bits set and everything else null.
*
* Next, we send RIOP\x80\x00\x08\x00. Each time, a 512 byte response
* must be read, but we must loop until byte 5 in the response is 0x08,
* indicating success. */
int rio_karma_init(struct us_data *us)
{
int result, partial;
char *recv;
unsigned long timeout;
// us->iobuf is big enough to hold cmd but not receive
if (!(recv = kmalloc(RIO_RECV_LEN, GFP_KERNEL)))
goto die_nomem;
US_DEBUGP("Initializing Karma...\n");
memset(us->iobuf, 0, RIO_SEND_LEN);
memcpy(us->iobuf, RIOP_INIT, RIOP_INIT_LEN);
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
us->iobuf, RIO_SEND_LEN, &partial);
if (result != USB_STOR_XFER_GOOD)
goto die;
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
recv, RIO_RECV_LEN, &partial);
if (result != USB_STOR_XFER_GOOD)
goto die;
us->iobuf[4] = 0x80;
us->iobuf[5] = 0;
timeout = jiffies + msecs_to_jiffies(3000);
for (;;) {
US_DEBUGP("Sending init command\n");
result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
us->iobuf, RIO_SEND_LEN, &partial);
if (result != USB_STOR_XFER_GOOD)
goto die;
result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
recv, RIO_RECV_LEN, &partial);
if (result != USB_STOR_XFER_GOOD)
goto die;
if (recv[5] == RIO_MSC)
break;
if (time_after(jiffies, timeout))
goto die;
msleep(10);
}
US_DEBUGP("Karma initialized.\n");
kfree(recv);
return 0;
die:
kfree(recv);
die_nomem:
US_DEBUGP("Could not initialize karma.\n");
return USB_STOR_TRANSPORT_FAILED;
}
|
