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Commit d020be92 authored by David Herrmann's avatar David Herrmann Committed by Jiri Kosina
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HID: wiimote: Add force-feedback support 



The wiimote has a single rumble motor. This adds force feedback support for
wiimote devices with FF_RUMBLE. The rumble motor is very simple and only
supports an on/off switch so no complex ff-effects are supported.

This also removes the event callback that was registered before but unused. The
ff-device overwrites this callback, anyway.

Signed-off-by: default avatarDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent c003ec21

drivers/hid/hid-wiimote.c

+28 −3
Original line number Diff line number Diff line
@@ -305,9 +305,28 @@ static void wiimote_leds_set(struct led_classdev *led_dev, 
	}

}



static int wiimote_input_event(struct input_dev *dev, unsigned int type,

						unsigned int code, int value)

static int wiimote_ff_play(struct input_dev *dev, void *data,

							struct ff_effect *eff)

{

	struct wiimote_data *wdata = input_get_drvdata(dev);

	__u8 value;

	unsigned long flags;



	/*

	 * The wiimote supports only a single rumble motor so if any magnitude

	 * is set to non-zero then we start the rumble motor. If both are set to

	 * zero, we stop the rumble motor.

	 */



	if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude)

		value = 1;

	else

		value = 0;



	spin_lock_irqsave(&wdata->state.lock, flags);

	wiiproto_req_rumble(wdata, value);

	spin_unlock_irqrestore(&wdata->state.lock, flags);



	return 0;

}
@@ -480,7 +499,6 @@ static struct wiimote_data *wiimote_create(struct hid_device *hdev) 
	hid_set_drvdata(hdev, wdata);



	input_set_drvdata(wdata->input, wdata);

	wdata->input->event = wiimote_input_event;

	wdata->input->open = wiimote_input_open;

	wdata->input->close = wiimote_input_close;

	wdata->input->dev.parent = &wdata->hdev->dev;
@@ -494,6 +512,13 @@ static struct wiimote_data *wiimote_create(struct hid_device *hdev) 
	for (i = 0; i < WIIPROTO_KEY_COUNT; ++i)

		set_bit(wiiproto_keymap[i], wdata->input->keybit);



	set_bit(FF_RUMBLE, wdata->input->ffbit);

	if (input_ff_create_memless(wdata->input, NULL, wiimote_ff_play)) {

		input_free_device(wdata->input);

		kfree(wdata);

		return NULL;

	}



	spin_lock_init(&wdata->qlock);

	INIT_WORK(&wdata->worker, wiimote_worker);