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1da177e4 LT |
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) \ | |
10523b3b | 27 | static ssize_t show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
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 | ||
10523b3b | 49 | static ssize_t show_configuration_string(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
50 | { |
51 | struct usb_device *udev; | |
52 | struct usb_host_config *actconfig; | |
53 | int len; | |
54 | ||
55 | udev = to_usb_device (dev); | |
56 | actconfig = udev->actconfig; | |
57 | if ((!actconfig) || (!actconfig->string)) | |
58 | return 0; | |
59 | len = sprintf(buf, actconfig->string, PAGE_SIZE); | |
60 | if (len < 0) | |
61 | return 0; | |
62 | buf[len] = '\n'; | |
63 | buf[len+1] = 0; | |
64 | return len+1; | |
65 | } | |
66 | static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL); | |
67 | ||
68 | /* configuration value is always present, and r/w */ | |
69 | usb_actconfig_show(bConfigurationValue, 1, "%u\n"); | |
70 | ||
71 | static ssize_t | |
10523b3b | 72 | set_bConfigurationValue (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
73 | { |
74 | struct usb_device *udev = udev = to_usb_device (dev); | |
75 | int config, value; | |
76 | ||
77 | if (sscanf (buf, "%u", &config) != 1 || config > 255) | |
78 | return -EINVAL; | |
79 | usb_lock_device(udev); | |
80 | value = usb_set_configuration (udev, config); | |
81 | usb_unlock_device(udev); | |
82 | return (value < 0) ? value : count; | |
83 | } | |
84 | ||
85 | static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR, | |
86 | show_bConfigurationValue, set_bConfigurationValue); | |
87 | ||
88 | /* String fields */ | |
89 | #define usb_string_attr(name) \ | |
10523b3b | 90 | static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
91 | { \ |
92 | struct usb_device *udev; \ | |
93 | int len; \ | |
94 | \ | |
95 | udev = to_usb_device (dev); \ | |
96 | len = snprintf(buf, 256, "%s", udev->name); \ | |
97 | if (len < 0) \ | |
98 | return 0; \ | |
99 | buf[len] = '\n'; \ | |
100 | buf[len+1] = 0; \ | |
101 | return len+1; \ | |
102 | } \ | |
103 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
104 | ||
105 | usb_string_attr(product); | |
106 | usb_string_attr(manufacturer); | |
107 | usb_string_attr(serial); | |
108 | ||
109 | static ssize_t | |
10523b3b | 110 | show_speed (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
111 | { |
112 | struct usb_device *udev; | |
113 | char *speed; | |
114 | ||
115 | udev = to_usb_device (dev); | |
116 | ||
117 | switch (udev->speed) { | |
118 | case USB_SPEED_LOW: | |
119 | speed = "1.5"; | |
120 | break; | |
121 | case USB_SPEED_UNKNOWN: | |
122 | case USB_SPEED_FULL: | |
123 | speed = "12"; | |
124 | break; | |
125 | case USB_SPEED_HIGH: | |
126 | speed = "480"; | |
127 | break; | |
128 | default: | |
129 | speed = "unknown"; | |
130 | } | |
131 | return sprintf (buf, "%s\n", speed); | |
132 | } | |
133 | static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL); | |
134 | ||
135 | static ssize_t | |
10523b3b | 136 | show_devnum (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
137 | { |
138 | struct usb_device *udev; | |
139 | ||
140 | udev = to_usb_device (dev); | |
141 | return sprintf (buf, "%d\n", udev->devnum); | |
142 | } | |
143 | static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL); | |
144 | ||
145 | static ssize_t | |
10523b3b | 146 | show_version (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
147 | { |
148 | struct usb_device *udev; | |
149 | u16 bcdUSB; | |
150 | ||
151 | udev = to_usb_device(dev); | |
152 | bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB); | |
153 | return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff); | |
154 | } | |
155 | static DEVICE_ATTR(version, S_IRUGO, show_version, NULL); | |
156 | ||
157 | static ssize_t | |
10523b3b | 158 | show_maxchild (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
159 | { |
160 | struct usb_device *udev; | |
161 | ||
162 | udev = to_usb_device (dev); | |
163 | return sprintf (buf, "%d\n", udev->maxchild); | |
164 | } | |
165 | static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL); | |
166 | ||
167 | /* Descriptor fields */ | |
168 | #define usb_descriptor_attr_le16(field, format_string) \ | |
169 | static ssize_t \ | |
10523b3b | 170 | show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
171 | { \ |
172 | struct usb_device *udev; \ | |
173 | \ | |
174 | udev = to_usb_device (dev); \ | |
175 | return sprintf (buf, format_string, \ | |
176 | le16_to_cpu(udev->descriptor.field)); \ | |
177 | } \ | |
178 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
179 | ||
180 | usb_descriptor_attr_le16(idVendor, "%04x\n") | |
181 | usb_descriptor_attr_le16(idProduct, "%04x\n") | |
182 | usb_descriptor_attr_le16(bcdDevice, "%04x\n") | |
183 | ||
184 | #define usb_descriptor_attr(field, format_string) \ | |
185 | static ssize_t \ | |
10523b3b | 186 | show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
187 | { \ |
188 | struct usb_device *udev; \ | |
189 | \ | |
190 | udev = to_usb_device (dev); \ | |
191 | return sprintf (buf, format_string, udev->descriptor.field); \ | |
192 | } \ | |
193 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
194 | ||
195 | usb_descriptor_attr (bDeviceClass, "%02x\n") | |
196 | usb_descriptor_attr (bDeviceSubClass, "%02x\n") | |
197 | usb_descriptor_attr (bDeviceProtocol, "%02x\n") | |
198 | usb_descriptor_attr (bNumConfigurations, "%d\n") | |
199 | ||
200 | static struct attribute *dev_attrs[] = { | |
201 | /* current configuration's attributes */ | |
202 | &dev_attr_bNumInterfaces.attr, | |
203 | &dev_attr_bConfigurationValue.attr, | |
204 | &dev_attr_bmAttributes.attr, | |
205 | &dev_attr_bMaxPower.attr, | |
206 | /* device attributes */ | |
207 | &dev_attr_idVendor.attr, | |
208 | &dev_attr_idProduct.attr, | |
209 | &dev_attr_bcdDevice.attr, | |
210 | &dev_attr_bDeviceClass.attr, | |
211 | &dev_attr_bDeviceSubClass.attr, | |
212 | &dev_attr_bDeviceProtocol.attr, | |
213 | &dev_attr_bNumConfigurations.attr, | |
214 | &dev_attr_speed.attr, | |
215 | &dev_attr_devnum.attr, | |
216 | &dev_attr_version.attr, | |
217 | &dev_attr_maxchild.attr, | |
218 | NULL, | |
219 | }; | |
220 | static struct attribute_group dev_attr_grp = { | |
221 | .attrs = dev_attrs, | |
222 | }; | |
223 | ||
224 | void usb_create_sysfs_dev_files (struct usb_device *udev) | |
225 | { | |
226 | struct device *dev = &udev->dev; | |
227 | ||
228 | sysfs_create_group(&dev->kobj, &dev_attr_grp); | |
229 | ||
230 | if (udev->manufacturer) | |
231 | device_create_file (dev, &dev_attr_manufacturer); | |
232 | if (udev->product) | |
233 | device_create_file (dev, &dev_attr_product); | |
234 | if (udev->serial) | |
235 | device_create_file (dev, &dev_attr_serial); | |
236 | device_create_file (dev, &dev_attr_configuration); | |
237 | } | |
238 | ||
239 | void usb_remove_sysfs_dev_files (struct usb_device *udev) | |
240 | { | |
241 | struct device *dev = &udev->dev; | |
242 | ||
243 | sysfs_remove_group(&dev->kobj, &dev_attr_grp); | |
244 | ||
245 | if (udev->descriptor.iManufacturer) | |
246 | device_remove_file(dev, &dev_attr_manufacturer); | |
247 | if (udev->descriptor.iProduct) | |
248 | device_remove_file(dev, &dev_attr_product); | |
249 | if (udev->descriptor.iSerialNumber) | |
250 | device_remove_file(dev, &dev_attr_serial); | |
251 | device_remove_file (dev, &dev_attr_configuration); | |
252 | } | |
253 | ||
254 | /* Interface fields */ | |
255 | #define usb_intf_attr(field, format_string) \ | |
256 | static ssize_t \ | |
10523b3b | 257 | show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
258 | { \ |
259 | struct usb_interface *intf = to_usb_interface (dev); \ | |
260 | \ | |
261 | return sprintf (buf, format_string, intf->cur_altsetting->desc.field); \ | |
262 | } \ | |
263 | static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); | |
264 | ||
265 | usb_intf_attr (bInterfaceNumber, "%02x\n") | |
266 | usb_intf_attr (bAlternateSetting, "%2d\n") | |
267 | usb_intf_attr (bNumEndpoints, "%02x\n") | |
268 | usb_intf_attr (bInterfaceClass, "%02x\n") | |
269 | usb_intf_attr (bInterfaceSubClass, "%02x\n") | |
270 | usb_intf_attr (bInterfaceProtocol, "%02x\n") | |
271 | ||
10523b3b | 272 | static ssize_t show_interface_string(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
273 | { |
274 | struct usb_interface *intf; | |
275 | struct usb_device *udev; | |
276 | int len; | |
277 | ||
278 | intf = to_usb_interface (dev); | |
279 | udev = interface_to_usbdev (intf); | |
280 | len = snprintf(buf, 256, "%s", intf->cur_altsetting->string); | |
281 | if (len < 0) | |
282 | return 0; | |
283 | buf[len] = '\n'; | |
284 | buf[len+1] = 0; | |
285 | return len+1; | |
286 | } | |
287 | static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL); | |
288 | ||
360b52b0 GKH |
289 | static ssize_t show_modalias(struct device *dev, char *buf) |
290 | { | |
291 | struct usb_interface *intf; | |
292 | struct usb_device *udev; | |
77ddecc3 | 293 | int len; |
360b52b0 GKH |
294 | |
295 | intf = to_usb_interface(dev); | |
296 | udev = interface_to_usbdev(intf); | |
360b52b0 | 297 | |
77ddecc3 | 298 | len = sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic", |
360b52b0 GKH |
299 | le16_to_cpu(udev->descriptor.idVendor), |
300 | le16_to_cpu(udev->descriptor.idProduct), | |
301 | le16_to_cpu(udev->descriptor.bcdDevice), | |
302 | udev->descriptor.bDeviceClass, | |
303 | udev->descriptor.bDeviceSubClass, | |
77ddecc3 PM |
304 | udev->descriptor.bDeviceProtocol); |
305 | buf += len; | |
306 | ||
307 | if (udev->descriptor.bDeviceClass == 0) { | |
308 | struct usb_host_interface *alt = intf->cur_altsetting; | |
309 | ||
310 | return len + sprintf(buf, "%02Xisc%02Xip%02X\n", | |
360b52b0 GKH |
311 | alt->desc.bInterfaceClass, |
312 | alt->desc.bInterfaceSubClass, | |
313 | alt->desc.bInterfaceProtocol); | |
314 | } else { | |
77ddecc3 | 315 | return len + sprintf(buf, "*isc*ip*\n"); |
360b52b0 | 316 | } |
360b52b0 GKH |
317 | } |
318 | static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL); | |
319 | ||
1da177e4 LT |
320 | static struct attribute *intf_attrs[] = { |
321 | &dev_attr_bInterfaceNumber.attr, | |
322 | &dev_attr_bAlternateSetting.attr, | |
323 | &dev_attr_bNumEndpoints.attr, | |
324 | &dev_attr_bInterfaceClass.attr, | |
325 | &dev_attr_bInterfaceSubClass.attr, | |
326 | &dev_attr_bInterfaceProtocol.attr, | |
360b52b0 | 327 | &dev_attr_modalias.attr, |
1da177e4 LT |
328 | NULL, |
329 | }; | |
330 | static struct attribute_group intf_attr_grp = { | |
331 | .attrs = intf_attrs, | |
332 | }; | |
333 | ||
334 | void usb_create_sysfs_intf_files (struct usb_interface *intf) | |
335 | { | |
336 | sysfs_create_group(&intf->dev.kobj, &intf_attr_grp); | |
337 | ||
338 | if (intf->cur_altsetting->string) | |
339 | device_create_file(&intf->dev, &dev_attr_interface); | |
340 | ||
341 | } | |
342 | ||
343 | void usb_remove_sysfs_intf_files (struct usb_interface *intf) | |
344 | { | |
345 | sysfs_remove_group(&intf->dev.kobj, &intf_attr_grp); | |
346 | ||
347 | if (intf->cur_altsetting->string) | |
348 | device_remove_file(&intf->dev, &dev_attr_interface); | |
349 | ||
350 | } |