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