HID: add HID_QUIRK_HIDDEV_FORCE and HID_QUIRK_NO_IGNORE

Add two quirks to make it possible for usbhid module options to
override whether a device is ignored (HID_QUIRK_NO_IGNORE) and
whether to connect a hiddev device (HID_QUIRK_HIDDEV_FORCE).

Passing HID_QUIRK_NO_IGNORE for your device means that it will
not be ignored by the HID layer, even if present in a blacklist.

HID_QUIRK_HIDDEV_FORCE will force the creation of a hiddev for that
device, making it accessible from user-space.

Tested with an Apple IR Receiver, switching it from using appleir
to using lirc's macmini driver.
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-core.c

@@ -1168,6 +1168,8 @@ int hid_connect(struct hid_device *hdev, unsigned int connect_mask)
 	unsigned int i;
 	int len;
 
+	if (hdev->quirks & HID_QUIRK_HIDDEV_FORCE)
+		connect_mask |= (HID_CONNECT_HIDDEV_FORCE | HID_CONNECT_HIDDEV);
 	if (hdev->bus != BUS_USB)
 		connect_mask &= ~HID_CONNECT_HIDDEV;
 	if (hid_hiddev(hdev))
@@ -1757,7 +1759,7 @@ int hid_add_device(struct hid_device *hdev)
 
 	/* we need to kill them here, otherwise they will stay allocated to
 	 * wait for coming driver */
-	if (hid_ignore(hdev))
+	if (!(hdev->quirks & HID_QUIRK_NO_IGNORE) && hid_ignore(hdev))
 		return -ENODEV;
 
 	/* XXX hack, any other cleaner solution after the driver core

drivers/hid/usbhid/hid-core.c

@@ -1143,6 +1143,7 @@ static int usbhid_probe(struct usb_interface *intf, const struct usb_device_id *
 	hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
 	hid->product = le16_to_cpu(dev->descriptor.idProduct);
 	hid->name[0] = 0;
+	hid->quirks = usbhid_lookup_quirk(hid->vendor, hid->product);
 	if (intf->cur_altsetting->desc.bInterfaceProtocol ==
 			USB_INTERFACE_PROTOCOL_MOUSE)
 		hid->type = HID_TYPE_USBMOUSE;

include/linux/hid.h

@@ -308,11 +308,13 @@ struct hid_item {
 #define HID_QUIRK_NOTOUCH			0x00000002
 #define HID_QUIRK_IGNORE			0x00000004
 #define HID_QUIRK_NOGET				0x00000008
+#define HID_QUIRK_HIDDEV_FORCE			0x00000010
 #define HID_QUIRK_BADPAD			0x00000020
 #define HID_QUIRK_MULTI_INPUT			0x00000040
 #define HID_QUIRK_SKIP_OUTPUT_REPORTS		0x00010000
 #define HID_QUIRK_FULLSPEED_INTERVAL		0x10000000
 #define HID_QUIRK_NO_INIT_REPORTS		0x20000000
+#define HID_QUIRK_NO_IGNORE			0x40000000
 
 /*
  * This is the global environment of the parser. This information is