HID: wiimote: add sub-device module infrastructure
To avoid loading all sub-device drivers for every Wii Remote, even though
the required hardware might not be available, we introduce a module layer.
The module layer specifies which sub-devices are available on each
device-type. After device detection, we only load the modules for the
detected device. If module loading fails, we unload everything and mark
the device as WIIMOTE_DEV_UNKNOWN. As long as a device is marked as
"unknown", no sub-devices will be used and the device is considered
unsupported.
All the different sub-devices, including KEYS, RUMBLE, BATTERY, LEDS,
ACCELEROMETER, IR and more will be ported in follow-up patches to the new
module layer.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h
index 3441702..3c94e3c 100644
--- a/drivers/hid/hid-wiimote.h
+++ b/drivers/hid/hid-wiimote.h
@@ -108,6 +108,33 @@
struct work_struct init_worker;
};
+/* wiimote modules */
+
+enum wiimod_module {
+ WIIMOD_NUM,
+ WIIMOD_NULL = WIIMOD_NUM,
+};
+
+#define WIIMOD_FLAG_INPUT 0x0001
+
+struct wiimod_ops {
+ __u16 flags;
+ unsigned long arg;
+ int (*probe) (const struct wiimod_ops *ops,
+ struct wiimote_data *wdata);
+ void (*remove) (const struct wiimod_ops *ops,
+ struct wiimote_data *wdata);
+
+ void (*in_keys) (struct wiimote_data *wdata, const __u8 *keys);
+ void (*in_accel) (struct wiimote_data *wdata, const __u8 *accel);
+ void (*in_ir) (struct wiimote_data *wdata, const __u8 *ir, bool packed,
+ unsigned int id);
+};
+
+extern const struct wiimod_ops *wiimod_table[WIIMOD_NUM];
+
+/* wiimote requests */
+
enum wiiproto_reqs {
WIIPROTO_REQ_NULL = 0x0,
WIIPROTO_REQ_RUMBLE = 0x10,
