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path: root/drivers/usb/core/sysfs.c
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Diffstat (limited to 'drivers/usb/core/sysfs.c')
-rw-r--r--drivers/usb/core/sysfs.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index ec9b3bde8ae..4d0c9e65cd0 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -286,6 +286,37 @@ static ssize_t show_interface_string(struct device *dev, char *buf)
}
static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);
+static ssize_t show_modalias(struct device *dev, char *buf)
+{
+ struct usb_interface *intf;
+ struct usb_device *udev;
+ int len;
+
+ intf = to_usb_interface(dev);
+ udev = interface_to_usbdev(intf);
+
+ len = sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic",
+ le16_to_cpu(udev->descriptor.idVendor),
+ le16_to_cpu(udev->descriptor.idProduct),
+ le16_to_cpu(udev->descriptor.bcdDevice),
+ udev->descriptor.bDeviceClass,
+ udev->descriptor.bDeviceSubClass,
+ udev->descriptor.bDeviceProtocol);
+ buf += len;
+
+ if (udev->descriptor.bDeviceClass == 0) {
+ struct usb_host_interface *alt = intf->cur_altsetting;
+
+ return len + sprintf(buf, "%02Xisc%02Xip%02X\n",
+ alt->desc.bInterfaceClass,
+ alt->desc.bInterfaceSubClass,
+ alt->desc.bInterfaceProtocol);
+ } else {
+ return len + sprintf(buf, "*isc*ip*\n");
+ }
+}
+static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);
+
static struct attribute *intf_attrs[] = {
&dev_attr_bInterfaceNumber.attr,
&dev_attr_bAlternateSetting.attr,
@@ -293,6 +324,7 @@ static struct attribute *intf_attrs[] = {
&dev_attr_bInterfaceClass.attr,
&dev_attr_bInterfaceSubClass.attr,
&dev_attr_bInterfaceProtocol.attr,
+ &dev_attr_modalias.attr,
NULL,
};
static struct attribute_group intf_attr_grp = {