2 * drivers/usb/core/sysfs.c
4 * (C) Copyright 2002 David Brownell
5 * (C) Copyright 2002,2004 Greg Kroah-Hartman
6 * (C) Copyright 2002,2004 IBM Corp.
8 * All of the sysfs file attributes for usb devices and interfaces.
13 #include <linux/kernel.h>
14 #include <linux/usb.h>
17 /* Active configuration fields */
18 #define usb_actconfig_show(field, multiplier, format_string) \
19 static ssize_t show_##field(struct device *dev, \
20 struct device_attribute *attr, char *buf) \
22 struct usb_device *udev; \
23 struct usb_host_config *actconfig; \
25 udev = to_usb_device(dev); \
26 actconfig = udev->actconfig; \
28 return sprintf(buf, format_string, \
29 actconfig->desc.field * multiplier); \
34 #define usb_actconfig_attr(field, multiplier, format_string) \
35 usb_actconfig_show(field, multiplier, format_string) \
36 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
38 usb_actconfig_attr(bNumInterfaces
, 1, "%2d\n")
39 usb_actconfig_attr(bmAttributes
, 1, "%2x\n")
40 usb_actconfig_attr(bMaxPower
, 2, "%3dmA\n")
42 static ssize_t
show_configuration_string(struct device
*dev
,
43 struct device_attribute
*attr
, char *buf
)
45 struct usb_device
*udev
;
46 struct usb_host_config
*actconfig
;
48 udev
= to_usb_device(dev
);
49 actconfig
= udev
->actconfig
;
50 if ((!actconfig
) || (!actconfig
->string
))
52 return sprintf(buf
, "%s\n", actconfig
->string
);
54 static DEVICE_ATTR(configuration
, S_IRUGO
, show_configuration_string
, NULL
);
56 /* configuration value is always present, and r/w */
57 usb_actconfig_show(bConfigurationValue
, 1, "%u\n");
60 set_bConfigurationValue(struct device
*dev
, struct device_attribute
*attr
,
61 const char *buf
, size_t count
)
63 struct usb_device
*udev
= to_usb_device(dev
);
66 if (sscanf(buf
, "%u", &config
) != 1 || config
> 255)
68 usb_lock_device(udev
);
69 value
= usb_set_configuration(udev
, config
);
70 usb_unlock_device(udev
);
71 return (value
< 0) ? value
: count
;
74 static DEVICE_ATTR(bConfigurationValue
, S_IRUGO
| S_IWUSR
,
75 show_bConfigurationValue
, set_bConfigurationValue
);
78 #define usb_string_attr(name) \
79 static ssize_t show_##name(struct device *dev, \
80 struct device_attribute *attr, char *buf) \
82 struct usb_device *udev; \
84 udev = to_usb_device(dev); \
85 return sprintf(buf, "%s\n", udev->name); \
87 static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
89 usb_string_attr(product
);
90 usb_string_attr(manufacturer
);
91 usb_string_attr(serial
);
94 show_speed(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
96 struct usb_device
*udev
;
99 udev
= to_usb_device(dev
);
101 switch (udev
->speed
) {
105 case USB_SPEED_UNKNOWN
:
115 return sprintf(buf
, "%s\n", speed
);
117 static DEVICE_ATTR(speed
, S_IRUGO
, show_speed
, NULL
);
120 show_devnum(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
122 struct usb_device
*udev
;
124 udev
= to_usb_device(dev
);
125 return sprintf(buf
, "%d\n", udev
->devnum
);
127 static DEVICE_ATTR(devnum
, S_IRUGO
, show_devnum
, NULL
);
130 show_version(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
132 struct usb_device
*udev
;
135 udev
= to_usb_device(dev
);
136 bcdUSB
= le16_to_cpu(udev
->descriptor
.bcdUSB
);
137 return sprintf(buf
, "%2x.%02x\n", bcdUSB
>> 8, bcdUSB
& 0xff);
139 static DEVICE_ATTR(version
, S_IRUGO
, show_version
, NULL
);
142 show_maxchild(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
144 struct usb_device
*udev
;
146 udev
= to_usb_device(dev
);
147 return sprintf(buf
, "%d\n", udev
->maxchild
);
149 static DEVICE_ATTR(maxchild
, S_IRUGO
, show_maxchild
, NULL
);
151 /* Descriptor fields */
152 #define usb_descriptor_attr_le16(field, format_string) \
154 show_##field(struct device *dev, struct device_attribute *attr, \
157 struct usb_device *udev; \
159 udev = to_usb_device(dev); \
160 return sprintf(buf, format_string, \
161 le16_to_cpu(udev->descriptor.field)); \
163 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
165 usb_descriptor_attr_le16(idVendor
, "%04x\n")
166 usb_descriptor_attr_le16(idProduct
, "%04x\n")
167 usb_descriptor_attr_le16(bcdDevice
, "%04x\n")
169 #define usb_descriptor_attr(field, format_string) \
171 show_##field(struct device *dev, struct device_attribute *attr, \
174 struct usb_device *udev; \
176 udev = to_usb_device(dev); \
177 return sprintf(buf, format_string, udev->descriptor.field); \
179 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
181 usb_descriptor_attr(bDeviceClass
, "%02x\n")
182 usb_descriptor_attr(bDeviceSubClass
, "%02x\n")
183 usb_descriptor_attr(bDeviceProtocol
, "%02x\n")
184 usb_descriptor_attr(bNumConfigurations
, "%d\n")
185 usb_descriptor_attr(bMaxPacketSize0
, "%d\n")
187 static struct attribute
*dev_attrs
[] = {
188 /* current configuration's attributes */
189 &dev_attr_configuration
.attr
,
190 &dev_attr_bNumInterfaces
.attr
,
191 &dev_attr_bConfigurationValue
.attr
,
192 &dev_attr_bmAttributes
.attr
,
193 &dev_attr_bMaxPower
.attr
,
194 /* device attributes */
195 &dev_attr_idVendor
.attr
,
196 &dev_attr_idProduct
.attr
,
197 &dev_attr_bcdDevice
.attr
,
198 &dev_attr_bDeviceClass
.attr
,
199 &dev_attr_bDeviceSubClass
.attr
,
200 &dev_attr_bDeviceProtocol
.attr
,
201 &dev_attr_bNumConfigurations
.attr
,
202 &dev_attr_bMaxPacketSize0
.attr
,
203 &dev_attr_speed
.attr
,
204 &dev_attr_devnum
.attr
,
205 &dev_attr_version
.attr
,
206 &dev_attr_maxchild
.attr
,
209 static struct attribute_group dev_attr_grp
= {
213 int usb_create_sysfs_dev_files(struct usb_device
*udev
)
215 struct device
*dev
= &udev
->dev
;
218 retval
= sysfs_create_group(&dev
->kobj
, &dev_attr_grp
);
222 if (udev
->manufacturer
) {
223 retval
= device_create_file(dev
, &dev_attr_manufacturer
);
228 retval
= device_create_file(dev
, &dev_attr_product
);
233 retval
= device_create_file(dev
, &dev_attr_serial
);
237 retval
= usb_create_ep_files(dev
, &udev
->ep0
, udev
);
242 usb_remove_ep_files(&udev
->ep0
);
243 device_remove_file(dev
, &dev_attr_manufacturer
);
244 device_remove_file(dev
, &dev_attr_product
);
245 device_remove_file(dev
, &dev_attr_serial
);
249 void usb_remove_sysfs_dev_files(struct usb_device
*udev
)
251 struct device
*dev
= &udev
->dev
;
253 usb_remove_ep_files(&udev
->ep0
);
254 sysfs_remove_group(&dev
->kobj
, &dev_attr_grp
);
256 if (udev
->manufacturer
)
257 device_remove_file(dev
, &dev_attr_manufacturer
);
259 device_remove_file(dev
, &dev_attr_product
);
261 device_remove_file(dev
, &dev_attr_serial
);
264 /* Interface fields */
265 #define usb_intf_attr(field, format_string) \
267 show_##field(struct device *dev, struct device_attribute *attr, \
270 struct usb_interface *intf = to_usb_interface(dev); \
272 return sprintf(buf, format_string, \
273 intf->cur_altsetting->desc.field); \
275 static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
277 usb_intf_attr(bInterfaceNumber
, "%02x\n")
278 usb_intf_attr(bAlternateSetting
, "%2d\n")
279 usb_intf_attr(bNumEndpoints
, "%02x\n")
280 usb_intf_attr(bInterfaceClass
, "%02x\n")
281 usb_intf_attr(bInterfaceSubClass
, "%02x\n")
282 usb_intf_attr(bInterfaceProtocol
, "%02x\n")
284 static ssize_t
show_interface_string(struct device
*dev
,
285 struct device_attribute
*attr
, char *buf
)
287 struct usb_interface
*intf
;
288 struct usb_device
*udev
;
291 intf
= to_usb_interface(dev
);
292 udev
= interface_to_usbdev(intf
);
293 len
= snprintf(buf
, 256, "%s", intf
->cur_altsetting
->string
);
300 static DEVICE_ATTR(interface
, S_IRUGO
, show_interface_string
, NULL
);
302 static ssize_t
show_modalias(struct device
*dev
,
303 struct device_attribute
*attr
, char *buf
)
305 struct usb_interface
*intf
;
306 struct usb_device
*udev
;
307 struct usb_host_interface
*alt
;
309 intf
= to_usb_interface(dev
);
310 udev
= interface_to_usbdev(intf
);
311 alt
= intf
->cur_altsetting
;
313 return sprintf(buf
, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X"
314 "ic%02Xisc%02Xip%02X\n",
315 le16_to_cpu(udev
->descriptor
.idVendor
),
316 le16_to_cpu(udev
->descriptor
.idProduct
),
317 le16_to_cpu(udev
->descriptor
.bcdDevice
),
318 udev
->descriptor
.bDeviceClass
,
319 udev
->descriptor
.bDeviceSubClass
,
320 udev
->descriptor
.bDeviceProtocol
,
321 alt
->desc
.bInterfaceClass
,
322 alt
->desc
.bInterfaceSubClass
,
323 alt
->desc
.bInterfaceProtocol
);
325 static DEVICE_ATTR(modalias
, S_IRUGO
, show_modalias
, NULL
);
327 static struct attribute
*intf_attrs
[] = {
328 &dev_attr_bInterfaceNumber
.attr
,
329 &dev_attr_bAlternateSetting
.attr
,
330 &dev_attr_bNumEndpoints
.attr
,
331 &dev_attr_bInterfaceClass
.attr
,
332 &dev_attr_bInterfaceSubClass
.attr
,
333 &dev_attr_bInterfaceProtocol
.attr
,
334 &dev_attr_modalias
.attr
,
337 static struct attribute_group intf_attr_grp
= {
341 static inline void usb_create_intf_ep_files(struct usb_interface
*intf
,
342 struct usb_device
*udev
)
344 struct usb_host_interface
*iface_desc
;
347 iface_desc
= intf
->cur_altsetting
;
348 for (i
= 0; i
< iface_desc
->desc
.bNumEndpoints
; ++i
)
349 usb_create_ep_files(&intf
->dev
, &iface_desc
->endpoint
[i
],
353 static inline void usb_remove_intf_ep_files(struct usb_interface
*intf
)
355 struct usb_host_interface
*iface_desc
;
358 iface_desc
= intf
->cur_altsetting
;
359 for (i
= 0; i
< iface_desc
->desc
.bNumEndpoints
; ++i
)
360 usb_remove_ep_files(&iface_desc
->endpoint
[i
]);
363 int usb_create_sysfs_intf_files(struct usb_interface
*intf
)
365 struct usb_device
*udev
= interface_to_usbdev(intf
);
366 struct usb_host_interface
*alt
= intf
->cur_altsetting
;
369 retval
= sysfs_create_group(&intf
->dev
.kobj
, &intf_attr_grp
);
373 if (alt
->string
== NULL
)
374 alt
->string
= usb_cache_string(udev
, alt
->desc
.iInterface
);
376 retval
= device_create_file(&intf
->dev
, &dev_attr_interface
);
377 usb_create_intf_ep_files(intf
, udev
);
381 device_remove_file(&intf
->dev
, &dev_attr_interface
);
382 sysfs_remove_group(&intf
->dev
.kobj
, &intf_attr_grp
);
383 usb_remove_intf_ep_files(intf
);
387 void usb_remove_sysfs_intf_files(struct usb_interface
*intf
)
389 usb_remove_intf_ep_files(intf
);
390 sysfs_remove_group(&intf
->dev
.kobj
, &intf_attr_grp
);
392 if (intf
->cur_altsetting
->string
)
393 device_remove_file(&intf
->dev
, &dev_attr_interface
);