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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
// SPDX-License-Identifier: GPL-2.0
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <linux/usb.h>
#include <linux/module.h>
#include <linux/slab.h>
#include "usb.h"
#include "transport.h"
#include "protocol.h"
#include "scsiglue.h"
#include "sierra_ms.h"
#include "debug.h"
#define SWIMS_USB_REQUEST_SetSwocMode 0x0B
#define SWIMS_USB_REQUEST_GetSwocInfo 0x0A
#define SWIMS_USB_INDEX_SetMode 0x0000
#define SWIMS_SET_MODE_Modem 0x0001
#define TRU_NORMAL 0x01
#define TRU_FORCE_MS 0x02
#define TRU_FORCE_MODEM 0x03
static unsigned int swi_tru_install = 1;
module_param(swi_tru_install, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(swi_tru_install, "TRU-Install mode (1=Full Logic (def),"
" 2=Force CD-Rom, 3=Force Modem)");
struct swoc_info {
__u8 rev;
__u8 reserved[8];
__u16 LinuxSKU;
__u16 LinuxVer;
__u8 reserved2[47];
} __attribute__((__packed__));
static bool containsFullLinuxPackage(struct swoc_info *swocInfo)
{
if ((swocInfo->LinuxSKU >= 0x2100 && swocInfo->LinuxSKU <= 0x2FFF) ||
(swocInfo->LinuxSKU >= 0x7100 && swocInfo->LinuxSKU <= 0x7FFF))
return true;
else
return false;
}
static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSWocMode)
{
int result;
dev_dbg(&udev->dev, "SWIMS: %s", "DEVICE MODE SWITCH\n");
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
SWIMS_USB_REQUEST_SetSwocMode, /* __u8 request */
USB_TYPE_VENDOR | USB_DIR_OUT, /* __u8 request type */
eSWocMode, /* __u16 value */
0x0000, /* __u16 index */
NULL, /* void *data */
0, /* __u16 size */
USB_CTRL_SET_TIMEOUT); /* int timeout */
return result;
}
static int sierra_get_swoc_info(struct usb_device *udev,
struct swoc_info *swocInfo)
{
int result;
dev_dbg(&udev->dev, "SWIMS: Attempting to get TRU-Install info\n");
result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
SWIMS_USB_REQUEST_GetSwocInfo, /* __u8 request */
USB_TYPE_VENDOR | USB_DIR_IN, /* __u8 request type */
0, /* __u16 value */
0, /* __u16 index */
(void *) swocInfo, /* void *data */
sizeof(struct swoc_info), /* __u16 size */
USB_CTRL_SET_TIMEOUT); /* int timeout */
swocInfo->LinuxSKU = le16_to_cpu(swocInfo->LinuxSKU);
swocInfo->LinuxVer = le16_to_cpu(swocInfo->LinuxVer);
return result;
}
static void debug_swoc(const struct device *dev, struct swoc_info *swocInfo)
{
dev_dbg(dev, "SWIMS: SWoC Rev: %02d\n", swocInfo->rev);
dev_dbg(dev, "SWIMS: Linux SKU: %04X\n", swocInfo->LinuxSKU);
dev_dbg(dev, "SWIMS: Linux Version: %04X\n", swocInfo->LinuxVer);
}
static ssize_t truinst_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct swoc_info *swocInfo;
struct usb_interface *intf = to_usb_interface(dev);
struct usb_device *udev = interface_to_usbdev(intf);
int result;
if (swi_tru_install == TRU_FORCE_MS) {
result = snprintf(buf, PAGE_SIZE, "Forced Mass Storage\n");
} else {
swocInfo = kmalloc(sizeof(struct swoc_info), GFP_KERNEL);
if (!swocInfo) {
snprintf(buf, PAGE_SIZE, "Error\n");
return -ENOMEM;
}
result = sierra_get_swoc_info(udev, swocInfo);
if (result < 0) {
dev_dbg(dev, "SWIMS: failed SWoC query\n");
kfree(swocInfo);
snprintf(buf, PAGE_SIZE, "Error\n");
return -EIO;
}
debug_swoc(dev, swocInfo);
result = snprintf(buf, PAGE_SIZE,
"REV=%02d SKU=%04X VER=%04X\n",
swocInfo->rev,
swocInfo->LinuxSKU,
swocInfo->LinuxVer);
kfree(swocInfo);
}
return result;
}
static DEVICE_ATTR_RO(truinst);
int sierra_ms_init(struct us_data *us)
{
int result, retries;
struct swoc_info *swocInfo;
struct usb_device *udev;
udev = us->pusb_dev;
/* Force Modem mode */
if (swi_tru_install == TRU_FORCE_MODEM) {
usb_stor_dbg(us, "SWIMS: Forcing Modem Mode\n");
result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
if (result < 0)
usb_stor_dbg(us, "SWIMS: Failed to switch to modem mode\n");
return -EIO;
}
/* Force Mass Storage mode (keep CD-Rom) */
else if (swi_tru_install == TRU_FORCE_MS) {
usb_stor_dbg(us, "SWIMS: Forcing Mass Storage Mode\n");
goto complete;
}
/* Normal TRU-Install Logic */
else {
usb_stor_dbg(us, "SWIMS: Normal SWoC Logic\n");
swocInfo = kmalloc(sizeof(struct swoc_info),
GFP_KERNEL);
if (!swocInfo)
return -ENOMEM;
retries = 3;
do {
retries--;
result = sierra_get_swoc_info(udev, swocInfo);
if (result < 0) {
usb_stor_dbg(us, "SWIMS: Failed SWoC query\n");
schedule_timeout_uninterruptible(2*HZ);
}
} while (retries && result < 0);
if (result < 0) {
usb_stor_dbg(us, "SWIMS: Completely failed SWoC query\n");
kfree(swocInfo);
return -EIO;
}
debug_swoc(&us->pusb_dev->dev, swocInfo);
/*
* If there is not Linux software on the TRU-Install device
* then switch to modem mode
*/
if (!containsFullLinuxPackage(swocInfo)) {
usb_stor_dbg(us, "SWIMS: Switching to Modem Mode\n");
result = sierra_set_ms_mode(udev,
SWIMS_SET_MODE_Modem);
if (result < 0)
usb_stor_dbg(us, "SWIMS: Failed to switch modem\n");
kfree(swocInfo);
return -EIO;
}
kfree(swocInfo);
}
complete:
return device_create_file(&us->pusb_intf->dev, &dev_attr_truinst);
}
|
