diff options
Diffstat (limited to 'drivers/usb/core/sysfs.c')
| -rw-r--r-- | drivers/usb/core/sysfs.c | 32 |
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 = { |