1 /*
2 * drivers/usb/core/sysfs.c
3 *
4 * (C) Copyright 2002 David Brownell
5 * (C) Copyright 2002,2004 Greg Kroah-Hartman
6 * (C) Copyright 2002,2004 IBM Corp.
7 *
8 * All of the sysfs file attributes for usb devices and interfaces.
9 *
10 */
11
12
13 #include <linux/config.h>
14 #include <linux/kernel.h>
15
16 #ifdef CONFIG_USB_DEBUG
17 #define DEBUG
18 #else
19 #undef DEBUG
20 #endif
21 #include <linux/usb.h>
22
23 #include "usb.h"
24
25 /* Active configuration fields */
26 #define usb_actconfig_show(field, multiplier, format_string) \
27 static ssize_t show_##field (struct device *dev, char *buf) \
28 { \
29 struct usb_device *udev; \
30 struct usb_host_config *actconfig; \
31 \
32 udev = to_usb_device (dev); \
33 actconfig = udev->actconfig; \
34 if (actconfig) \
35 return sprintf (buf, format_string, \
36 actconfig->desc.field * multiplier); \
37 else \
38 return 0; \
39 } \
40
41 #define usb_actconfig_attr(field, multiplier, format_string) \
42 usb_actconfig_show(field, multiplier, format_string) \
43 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
44
45 usb_actconfig_attr (bNumInterfaces, 1, "%2d\n")
46 usb_actconfig_attr (bmAttributes, 1, "%2x\n")
47 usb_actconfig_attr (bMaxPower, 2, "%3dmA\n")
48
49 #define usb_actconfig_str(name, field) \
50 static ssize_t show_##name(struct device *dev, char *buf) \
51 { \
52 struct usb_device *udev; \
53 struct usb_host_config *actconfig; \
54 int len; \
55 \
56 udev = to_usb_device (dev); \
57 actconfig = udev->actconfig; \
58 if (!actconfig) \
59 return 0; \
60 len = usb_string(udev, actconfig->desc.field, buf, PAGE_SIZE); \
61 if (len < 0) \
62 return 0; \
63 buf[len] = '\n'; \
64 buf[len+1] = 0; \
65 return len+1; \
66 } \
67 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
68
69 usb_actconfig_str (configuration, iConfiguration)
70
71 /* configuration value is always present, and r/w */
72 usb_actconfig_show(bConfigurationValue, 1, "%u\n");
73
74 static ssize_t
75 set_bConfigurationValue (struct device *dev, const char *buf, size_t count)
76 {
77 struct usb_device *udev = udev = to_usb_device (dev);
78 int config, value;
79
80 if (sscanf (buf, "%u", &config) != 1 || config > 255)
81 return -EINVAL;
82 usb_lock_device(udev);
83 value = usb_set_configuration (udev, config);
84 usb_unlock_device(udev);
85 return (value < 0) ? value : count;
86 }
87
88 static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR,
89 show_bConfigurationValue, set_bConfigurationValue);
90
91 /* String fields */
92 #define usb_string_attr(name, field) \
93 static ssize_t show_##name(struct device *dev, char *buf) \
94 { \
95 struct usb_device *udev; \
96 int len; \
97 \
98 udev = to_usb_device (dev); \
99 len = usb_string(udev, udev->descriptor.field, buf, PAGE_SIZE); \
100 if (len < 0) \
101 return 0; \
102 buf[len] = '\n'; \
103 buf[len+1] = 0; \
104 return len+1; \
105 } \
106 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
107
108 usb_string_attr(product, iProduct);
109 usb_string_attr(manufacturer, iManufacturer);
110 usb_string_attr(serial, iSerialNumber);
111
112 static ssize_t
113 show_speed (struct device *dev, char *buf)
114 {
115 struct usb_device *udev;
116 char *speed;
117
118 udev = to_usb_device (dev);
119
120 switch (udev->speed) {
121 case USB_SPEED_LOW:
122 speed = "1.5";
123 break;
124 case USB_SPEED_UNKNOWN:
125 case USB_SPEED_FULL:
126 speed = "12";
127 break;
128 case USB_SPEED_HIGH:
129 speed = "480";
130 break;
131 default:
132 speed = "unknown";
133 }
134 return sprintf (buf, "%s\n", speed);
135 }
136 static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL);
137
138 static ssize_t
139 show_devnum (struct device *dev, char *buf)
140 {
141 struct usb_device *udev;
142
143 udev = to_usb_device (dev);
144 return sprintf (buf, "%d\n", udev->devnum);
145 }
146 static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL);
147
148 static ssize_t
149 show_version (struct device *dev, char *buf)
150 {
151 struct usb_device *udev;
152 u16 bcdUSB;
153
154 udev = to_usb_device(dev);
155 bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB);
156 return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff);
157 }
158 static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
159
160 static ssize_t
161 show_maxchild (struct device *dev, char *buf)
162 {
163 struct usb_device *udev;
164
165 udev = to_usb_device (dev);
166 return sprintf (buf, "%d\n", udev->maxchild);
167 }
168 static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL);
169
170 /* Descriptor fields */
171 #define usb_descriptor_attr_le16(field, format_string) \
172 static ssize_t \
173 show_##field (struct device *dev, char *buf) \
174 { \
175 struct usb_device *udev; \
176 \
177 udev = to_usb_device (dev); \
178 return sprintf (buf, format_string, \
179 le16_to_cpu(udev->descriptor.field)); \
180 } \
181 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
182
183 usb_descriptor_attr_le16(idVendor, "%04x\n")
184 usb_descriptor_attr_le16(idProduct, "%04x\n")
185 usb_descriptor_attr_le16(bcdDevice, "%04x\n")
186
187 #define usb_descriptor_attr(field, format_string) \
188 static ssize_t \
189 show_##field (struct device *dev, char *buf) \
190 { \
191 struct usb_device *udev; \
192 \
193 udev = to_usb_device (dev); \
194 return sprintf (buf, format_string, udev->descriptor.field); \
195 } \
196 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
197
198 usb_descriptor_attr (bDeviceClass, "%02x\n")
199 usb_descriptor_attr (bDeviceSubClass, "%02x\n")
200 usb_descriptor_attr (bDeviceProtocol, "%02x\n")
201 usb_descriptor_attr (bNumConfigurations, "%d\n")
202
203 static struct attribute *dev_attrs[] = {
204 /* current configuration's attributes */
205 &dev_attr_bNumInterfaces.attr,
206 &dev_attr_bConfigurationValue.attr,
207 &dev_attr_bmAttributes.attr,
208 &dev_attr_bMaxPower.attr,
209 /* device attributes */
210 &dev_attr_idVendor.attr,
211 &dev_attr_idProduct.attr,
212 &dev_attr_bcdDevice.attr,
213 &dev_attr_bDeviceClass.attr,
214 &dev_attr_bDeviceSubClass.attr,
215 &dev_attr_bDeviceProtocol.attr,
216 &dev_attr_bNumConfigurations.attr,
217 &dev_attr_speed.attr,
218 &dev_attr_devnum.attr,
219 &dev_attr_version.attr,
220 &dev_attr_maxchild.attr,
221 NULL,
222 };
223 static struct attribute_group dev_attr_grp = {
224 .attrs = dev_attrs,
225 };
226
227 void usb_create_sysfs_dev_files (struct usb_device *udev)
228 {
229 struct device *dev = &udev->dev;
230
231 sysfs_create_group(&dev->kobj, &dev_attr_grp);
232
233 if (udev->descriptor.iManufacturer)
234 device_create_file (dev, &dev_attr_manufacturer);
235 if (udev->descriptor.iProduct)
236 device_create_file (dev, &dev_attr_product);
237 if (udev->descriptor.iSerialNumber)
238 device_create_file (dev, &dev_attr_serial);
239 device_create_file (dev, &dev_attr_configuration);
240 }
241
242 void usb_remove_sysfs_dev_files (struct usb_device *udev)
243 {
244 struct device *dev = &udev->dev;
245
246 sysfs_remove_group(&dev->kobj, &dev_attr_grp);
247
248 if (udev->descriptor.iManufacturer)
249 device_remove_file(dev, &dev_attr_manufacturer);
250 if (udev->descriptor.iProduct)
251 device_remove_file(dev, &dev_attr_product);
252 if (udev->descriptor.iSerialNumber)
253 device_remove_file(dev, &dev_attr_serial);
254 device_remove_file (dev, &dev_attr_configuration);
255 }
256
257 /* Interface fields */
258 #define usb_intf_attr(field, format_string) \
259 static ssize_t \
260 show_##field (struct device *dev, char *buf) \
261 { \
262 struct usb_interface *intf = to_usb_interface (dev); \
263 \
264 return sprintf (buf, format_string, intf->cur_altsetting->desc.field); \
265 } \
266 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
267
268 usb_intf_attr (bInterfaceNumber, "%02x\n")
269 usb_intf_attr (bAlternateSetting, "%2d\n")
270 usb_intf_attr (bNumEndpoints, "%02x\n")
271 usb_intf_attr (bInterfaceClass, "%02x\n")
272 usb_intf_attr (bInterfaceSubClass, "%02x\n")
273 usb_intf_attr (bInterfaceProtocol, "%02x\n")
274
275 #define usb_intf_str(name, field) \
276 static ssize_t show_##name(struct device *dev, char *buf) \
277 { \
278 struct usb_interface *intf; \
279 struct usb_device *udev; \
280 int len; \
281 \
282 intf = to_usb_interface (dev); \
283 udev = interface_to_usbdev (intf); \
284 len = usb_string(udev, intf->cur_altsetting->desc.field, buf, PAGE_SIZE);\
285 if (len < 0) \
286 return 0; \
287 buf[len] = '\n'; \
288 buf[len+1] = 0; \
289 return len+1; \
290 } \
291 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
292
293 usb_intf_str (interface, iInterface);
294
295 static struct attribute *intf_attrs[] = {
296 &dev_attr_bInterfaceNumber.attr,
297 &dev_attr_bAlternateSetting.attr,
298 &dev_attr_bNumEndpoints.attr,
299 &dev_attr_bInterfaceClass.attr,
300 &dev_attr_bInterfaceSubClass.attr,
301 &dev_attr_bInterfaceProtocol.attr,
302 NULL,
303 };
304 static struct attribute_group intf_attr_grp = {
305 .attrs = intf_attrs,
306 };
307
308 void usb_create_sysfs_intf_files (struct usb_interface *intf)
309 {
310 sysfs_create_group(&intf->dev.kobj, &intf_attr_grp);
311
312 if (intf->cur_altsetting->desc.iInterface)
313 device_create_file(&intf->dev, &dev_attr_interface);
314
315 }
316
317 void usb_remove_sysfs_intf_files (struct usb_interface *intf)
318 {
319 sysfs_remove_group(&intf->dev.kobj, &intf_attr_grp);
320
321 if (intf->cur_altsetting->desc.iInterface)
322 device_remove_file(&intf->dev, &dev_attr_interface);
323
324 }
325
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