1#include <scsi/scsi.h>
2#include <scsi/scsi_host.h>
3#include <scsi/scsi_cmnd.h>
4#include <scsi/scsi_device.h>
5#include <linux/usb.h>
6#include <linux/module.h>
7#include <linux/slab.h>
8
9#include "usb.h"
10#include "transport.h"
11#include "protocol.h"
12#include "scsiglue.h"
13#include "sierra_ms.h"
14#include "debug.h"
15
16#define SWIMS_USB_REQUEST_SetSwocMode 0x0B
17#define SWIMS_USB_REQUEST_GetSwocInfo 0x0A
18#define SWIMS_USB_INDEX_SetMode 0x0000
19#define SWIMS_SET_MODE_Modem 0x0001
20
21#define TRU_NORMAL 0x01
22#define TRU_FORCE_MS 0x02
23#define TRU_FORCE_MODEM 0x03
24
25static unsigned int swi_tru_install = 1;
26module_param(swi_tru_install, uint, S_IRUGO | S_IWUSR);
27MODULE_PARM_DESC(swi_tru_install, "TRU-Install mode (1=Full Logic (def),"
28 " 2=Force CD-Rom, 3=Force Modem)");
29
30struct swoc_info {
31 __u8 rev;
32 __u8 reserved[8];
33 __u16 LinuxSKU;
34 __u16 LinuxVer;
35 __u8 reserved2[47];
36} __attribute__((__packed__));
37
38static bool containsFullLinuxPackage(struct swoc_info *swocInfo)
39{
40 if ((swocInfo->LinuxSKU >= 0x2100 && swocInfo->LinuxSKU <= 0x2FFF) ||
41 (swocInfo->LinuxSKU >= 0x7100 && swocInfo->LinuxSKU <= 0x7FFF))
42 return true;
43 else
44 return false;
45}
46
47static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSWocMode)
48{
49 int result;
50 dev_dbg(&udev->dev, "SWIMS: %s", "DEVICE MODE SWITCH\n");
51 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
52 SWIMS_USB_REQUEST_SetSwocMode,
53 USB_TYPE_VENDOR | USB_DIR_OUT,
54 eSWocMode,
55 0x0000,
56 NULL,
57 0,
58 USB_CTRL_SET_TIMEOUT);
59 return result;
60}
61
62
63static int sierra_get_swoc_info(struct usb_device *udev,
64 struct swoc_info *swocInfo)
65{
66 int result;
67
68 dev_dbg(&udev->dev, "SWIMS: Attempting to get TRU-Install info\n");
69
70 result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
71 SWIMS_USB_REQUEST_GetSwocInfo,
72 USB_TYPE_VENDOR | USB_DIR_IN,
73 0,
74 0,
75 (void *) swocInfo,
76 sizeof(struct swoc_info),
77 USB_CTRL_SET_TIMEOUT);
78
79 swocInfo->LinuxSKU = le16_to_cpu(swocInfo->LinuxSKU);
80 swocInfo->LinuxVer = le16_to_cpu(swocInfo->LinuxVer);
81 return result;
82}
83
84static void debug_swoc(const struct device *dev, struct swoc_info *swocInfo)
85{
86 dev_dbg(dev, "SWIMS: SWoC Rev: %02d\n", swocInfo->rev);
87 dev_dbg(dev, "SWIMS: Linux SKU: %04X\n", swocInfo->LinuxSKU);
88 dev_dbg(dev, "SWIMS: Linux Version: %04X\n", swocInfo->LinuxVer);
89}
90
91
92static ssize_t show_truinst(struct device *dev, struct device_attribute *attr,
93 char *buf)
94{
95 struct swoc_info *swocInfo;
96 struct usb_interface *intf = to_usb_interface(dev);
97 struct usb_device *udev = interface_to_usbdev(intf);
98 int result;
99 if (swi_tru_install == TRU_FORCE_MS) {
100 result = snprintf(buf, PAGE_SIZE, "Forced Mass Storage\n");
101 } else {
102 swocInfo = kmalloc(sizeof(struct swoc_info), GFP_KERNEL);
103 if (!swocInfo) {
104 snprintf(buf, PAGE_SIZE, "Error\n");
105 return -ENOMEM;
106 }
107 result = sierra_get_swoc_info(udev, swocInfo);
108 if (result < 0) {
109 dev_dbg(dev, "SWIMS: failed SWoC query\n");
110 kfree(swocInfo);
111 snprintf(buf, PAGE_SIZE, "Error\n");
112 return -EIO;
113 }
114 debug_swoc(dev, swocInfo);
115 result = snprintf(buf, PAGE_SIZE,
116 "REV=%02d SKU=%04X VER=%04X\n",
117 swocInfo->rev,
118 swocInfo->LinuxSKU,
119 swocInfo->LinuxVer);
120 kfree(swocInfo);
121 }
122 return result;
123}
124static DEVICE_ATTR(truinst, S_IRUGO, show_truinst, NULL);
125
126int sierra_ms_init(struct us_data *us)
127{
128 int result, retries;
129 struct swoc_info *swocInfo;
130 struct usb_device *udev;
131 struct Scsi_Host *sh;
132
133 retries = 3;
134 result = 0;
135 udev = us->pusb_dev;
136
137 sh = us_to_host(us);
138 scsi_get_host_dev(sh);
139
140
141 if (swi_tru_install == TRU_FORCE_MODEM) {
142 usb_stor_dbg(us, "SWIMS: Forcing Modem Mode\n");
143 result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
144 if (result < 0)
145 usb_stor_dbg(us, "SWIMS: Failed to switch to modem mode\n");
146 return -EIO;
147 }
148
149 else if (swi_tru_install == TRU_FORCE_MS) {
150 usb_stor_dbg(us, "SWIMS: Forcing Mass Storage Mode\n");
151 goto complete;
152 }
153
154 else {
155 usb_stor_dbg(us, "SWIMS: Normal SWoC Logic\n");
156
157 swocInfo = kmalloc(sizeof(struct swoc_info),
158 GFP_KERNEL);
159 if (!swocInfo)
160 return -ENOMEM;
161
162 retries = 3;
163 do {
164 retries--;
165 result = sierra_get_swoc_info(udev, swocInfo);
166 if (result < 0) {
167 usb_stor_dbg(us, "SWIMS: Failed SWoC query\n");
168 schedule_timeout_uninterruptible(2*HZ);
169 }
170 } while (retries && result < 0);
171
172 if (result < 0) {
173 usb_stor_dbg(us, "SWIMS: Completely failed SWoC query\n");
174 kfree(swocInfo);
175 return -EIO;
176 }
177
178 debug_swoc(&us->pusb_dev->dev, swocInfo);
179
180
181
182
183 if (!containsFullLinuxPackage(swocInfo)) {
184 usb_stor_dbg(us, "SWIMS: Switching to Modem Mode\n");
185 result = sierra_set_ms_mode(udev,
186 SWIMS_SET_MODE_Modem);
187 if (result < 0)
188 usb_stor_dbg(us, "SWIMS: Failed to switch modem\n");
189 kfree(swocInfo);
190 return -EIO;
191 }
192 kfree(swocInfo);
193 }
194complete:
195 result = device_create_file(&us->pusb_intf->dev, &dev_attr_truinst);
196
197 return 0;
198}
199
200
