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/slab.h>
7
8 #include "usb.h"
9 #include "transport.h"
10 #include "protocol.h"
11 #include "scsiglue.h"
12 #include "sierra_ms.h"
13 #include "debug.h"
14
15 #define SWIMS_USB_REQUEST_SetSwocMode 0x0B
16 #define SWIMS_USB_REQUEST_GetSwocInfo 0x0A
17 #define SWIMS_USB_INDEX_SetMode 0x0000
18 #define SWIMS_SET_MODE_Modem 0x0001
19
20 #define TRU_NORMAL 0x01
21 #define TRU_FORCE_MS 0x02
22 #define TRU_FORCE_MODEM 0x03
23
24 static unsigned int swi_tru_install = 1;
25 module_param(swi_tru_install, uint, S_IRUGO | S_IWUSR);
26 MODULE_PARM_DESC(swi_tru_install, "TRU-Install mode (1=Full Logic (def),"
27 " 2=Force CD-Rom, 3=Force Modem)");
28
29 struct swoc_info {
30 __u8 rev;
31 __u8 reserved[8];
32 __u16 LinuxSKU;
33 __u16 LinuxVer;
34 __u8 reserved2[47];
35 } __attribute__((__packed__));
36
containsFullLinuxPackage(struct swoc_info * swocInfo)37 static bool containsFullLinuxPackage(struct swoc_info *swocInfo)
38 {
39 if ((swocInfo->LinuxSKU >= 0x2100 && swocInfo->LinuxSKU <= 0x2FFF) ||
40 (swocInfo->LinuxSKU >= 0x7100 && swocInfo->LinuxSKU <= 0x7FFF))
41 return true;
42 else
43 return false;
44 }
45
sierra_set_ms_mode(struct usb_device * udev,__u16 eSWocMode)46 static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSWocMode)
47 {
48 int result;
49 US_DEBUGP("SWIMS: %s", "DEVICE MODE SWITCH\n");
50 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
51 SWIMS_USB_REQUEST_SetSwocMode, /* __u8 request */
52 USB_TYPE_VENDOR | USB_DIR_OUT, /* __u8 request type */
53 eSWocMode, /* __u16 value */
54 0x0000, /* __u16 index */
55 NULL, /* void *data */
56 0, /* __u16 size */
57 USB_CTRL_SET_TIMEOUT); /* int timeout */
58 return result;
59 }
60
61
sierra_get_swoc_info(struct usb_device * udev,struct swoc_info * swocInfo)62 static int sierra_get_swoc_info(struct usb_device *udev,
63 struct swoc_info *swocInfo)
64 {
65 int result;
66
67 US_DEBUGP("SWIMS: Attempting to get TRU-Install info.\n");
68
69 result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
70 SWIMS_USB_REQUEST_GetSwocInfo, /* __u8 request */
71 USB_TYPE_VENDOR | USB_DIR_IN, /* __u8 request type */
72 0, /* __u16 value */
73 0, /* __u16 index */
74 (void *) swocInfo, /* void *data */
75 sizeof(struct swoc_info), /* __u16 size */
76 USB_CTRL_SET_TIMEOUT); /* int timeout */
77
78 swocInfo->LinuxSKU = le16_to_cpu(swocInfo->LinuxSKU);
79 swocInfo->LinuxVer = le16_to_cpu(swocInfo->LinuxVer);
80 return result;
81 }
82
debug_swoc(struct swoc_info * swocInfo)83 static void debug_swoc(struct swoc_info *swocInfo)
84 {
85 US_DEBUGP("SWIMS: SWoC Rev: %02d \n", swocInfo->rev);
86 US_DEBUGP("SWIMS: Linux SKU: %04X \n", swocInfo->LinuxSKU);
87 US_DEBUGP("SWIMS: Linux Version: %04X \n", swocInfo->LinuxVer);
88 }
89
90
show_truinst(struct device * dev,struct device_attribute * attr,char * buf)91 static ssize_t show_truinst(struct device *dev, struct device_attribute *attr,
92 char *buf)
93 {
94 struct swoc_info *swocInfo;
95 struct usb_interface *intf = to_usb_interface(dev);
96 struct usb_device *udev = interface_to_usbdev(intf);
97 int result;
98 if (swi_tru_install == TRU_FORCE_MS) {
99 result = snprintf(buf, PAGE_SIZE, "Forced Mass Storage\n");
100 } else {
101 swocInfo = kmalloc(sizeof(struct swoc_info), GFP_KERNEL);
102 if (!swocInfo) {
103 US_DEBUGP("SWIMS: Allocation failure\n");
104 snprintf(buf, PAGE_SIZE, "Error\n");
105 return -ENOMEM;
106 }
107 result = sierra_get_swoc_info(udev, swocInfo);
108 if (result < 0) {
109 US_DEBUGP("SWIMS: failed SWoC query\n");
110 kfree(swocInfo);
111 snprintf(buf, PAGE_SIZE, "Error\n");
112 return -EIO;
113 }
114 debug_swoc(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 }
124 static DEVICE_ATTR(truinst, S_IRUGO, show_truinst, NULL);
125
sierra_ms_init(struct us_data * us)126 int 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 struct scsi_device *sd;
133
134 retries = 3;
135 result = 0;
136 udev = us->pusb_dev;
137
138 sh = us_to_host(us);
139 sd = scsi_get_host_dev(sh);
140
141 US_DEBUGP("SWIMS: sierra_ms_init called\n");
142
143 /* Force Modem mode */
144 if (swi_tru_install == TRU_FORCE_MODEM) {
145 US_DEBUGP("SWIMS: %s", "Forcing Modem Mode\n");
146 result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
147 if (result < 0)
148 US_DEBUGP("SWIMS: Failed to switch to modem mode.\n");
149 return -EIO;
150 }
151 /* Force Mass Storage mode (keep CD-Rom) */
152 else if (swi_tru_install == TRU_FORCE_MS) {
153 US_DEBUGP("SWIMS: %s", "Forcing Mass Storage Mode\n");
154 goto complete;
155 }
156 /* Normal TRU-Install Logic */
157 else {
158 US_DEBUGP("SWIMS: %s", "Normal SWoC Logic\n");
159
160 swocInfo = kmalloc(sizeof(struct swoc_info),
161 GFP_KERNEL);
162 if (!swocInfo) {
163 US_DEBUGP("SWIMS: %s", "Allocation failure\n");
164 return -ENOMEM;
165 }
166
167 retries = 3;
168 do {
169 retries--;
170 result = sierra_get_swoc_info(udev, swocInfo);
171 if (result < 0) {
172 US_DEBUGP("SWIMS: %s", "Failed SWoC query\n");
173 schedule_timeout_uninterruptible(2*HZ);
174 }
175 } while (retries && result < 0);
176
177 if (result < 0) {
178 US_DEBUGP("SWIMS: %s",
179 "Completely failed SWoC query\n");
180 kfree(swocInfo);
181 return -EIO;
182 }
183
184 debug_swoc(swocInfo);
185
186 /* If there is not Linux software on the TRU-Install device
187 * then switch to modem mode
188 */
189 if (!containsFullLinuxPackage(swocInfo)) {
190 US_DEBUGP("SWIMS: %s",
191 "Switching to Modem Mode\n");
192 result = sierra_set_ms_mode(udev,
193 SWIMS_SET_MODE_Modem);
194 if (result < 0)
195 US_DEBUGP("SWIMS: Failed to switch modem\n");
196 kfree(swocInfo);
197 return -EIO;
198 }
199 kfree(swocInfo);
200 }
201 complete:
202 result = device_create_file(&us->pusb_intf->dev, &dev_attr_truinst);
203
204 return 0;
205 }
206
207