tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 US_DEBUGP("SWIMS: %s", "DEVICE MODE SWITCH\n");
51 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
52 SWIMS_USB_REQUEST_SetSwocMode, /* __u8 request */
53 USB_TYPE_VENDOR | USB_DIR_OUT, /* __u8 request type */
54 eSWocMode, /* __u16 value */
55 0x0000, /* __u16 index */
56 NULL, /* void *data */
57 0, /* __u16 size */
58 USB_CTRL_SET_TIMEOUT); /* int 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 US_DEBUGP("SWIMS: Attempting to get TRU-Install info.\n");
69
70 result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
71 SWIMS_USB_REQUEST_GetSwocInfo, /* __u8 request */
72 USB_TYPE_VENDOR | USB_DIR_IN, /* __u8 request type */
73 0, /* __u16 value */
74 0, /* __u16 index */
75 (void *) swocInfo, /* void *data */
76 sizeof(struct swoc_info), /* __u16 size */
77 USB_CTRL_SET_TIMEOUT); /* int 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(struct swoc_info *swocInfo)
85{
86 US_DEBUGP("SWIMS: SWoC Rev: %02d \n", swocInfo->rev);
87 US_DEBUGP("SWIMS: Linux SKU: %04X \n", swocInfo->LinuxSKU);
88 US_DEBUGP("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 US_DEBUGP("SWIMS: Allocation failure\n");
105 snprintf(buf, PAGE_SIZE, "Error\n");
106 return -ENOMEM;
107 }
108 result = sierra_get_swoc_info(udev, swocInfo);
109 if (result < 0) {
110 US_DEBUGP("SWIMS: failed SWoC query\n");
111 kfree(swocInfo);
112 snprintf(buf, PAGE_SIZE, "Error\n");
113 return -EIO;
114 }
115 debug_swoc(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(truinst, S_IRUGO, show_truinst, NULL);
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 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 }
201complete:
202 result = device_create_file(&us->pusb_intf->dev, &dev_attr_truinst);
203
204 return 0;
205}
206