Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit c1e51398 authored by David Herrmann's avatar David Herrmann Committed by Jiri Kosina
Browse files

HID: wiimote: Add extension sysfs attribute 



Add new sysfs attribute "extension" which returns the currently connected and
initialized extensions.

Signed-off-by: default avatarDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 492ba955

Documentation/ABI/testing/sysfs-driver-hid-wiimote

+12 −0
Original line number Diff line number Diff line
@@ -8,3 +8,15 @@ Contact: David Herrmann <dh.herrmann@googlemail.com> 
Description:	Make it possible to set/get current led state. Reading from it

		returns 0 if led is off and 1 if it is on. Writing 0 to it

		disables the led, writing 1 enables it.



What:		/sys/bus/hid/drivers/wiimote/<dev>/extension

Date:		August 2011

KernelVersion:	3.2

Contact:	David Herrmann <dh.herrmann@googlemail.com>

Description:	This file contains the currently connected and initialized

		extensions. It can be one of: none, motionp, nunchuck, classic,

		motionp+nunchuck, motionp+classic

		motionp is the official Nintendo Motion+ extension, nunchuck is

		the official Nintendo Nunchuck extension and classic is the

		Nintendo Classic Controller extension. The motionp extension can

		be combined with the other two.

drivers/hid/hid-wiimote-ext.c

+46 −0
Original line number Diff line number Diff line
@@ -199,11 +199,47 @@ bool wiiext_active(struct wiimote_data *wdata) 
	return wdata->ext->motionp || wdata->ext->ext_type;

}



static ssize_t wiiext_show(struct device *dev, struct device_attribute *attr,

								char *buf)

{

	struct wiimote_data *wdata = dev_to_wii(dev);

	__u8 type = WIIEXT_NONE;

	bool motionp = false;

	unsigned long flags;



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

	if (wdata->ext) {

		motionp = wdata->ext->motionp;

		type = wdata->ext->ext_type;

	}

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



	if (type == WIIEXT_NUNCHUCK) {

		if (motionp)

			return sprintf(buf, "motionp+nunchuck\n");

		else

			return sprintf(buf, "nunchuck\n");

	} else if (type == WIIEXT_CLASSIC) {

		if (motionp)

			return sprintf(buf, "motionp+classic\n");

		else

			return sprintf(buf, "classic\n");

	} else {

		if (motionp)

			return sprintf(buf, "motionp\n");

		else

			return sprintf(buf, "none\n");

	}

}



static DEVICE_ATTR(extension, S_IRUGO, wiiext_show, NULL);



/* Initializes the extension driver of a wiimote */

int wiiext_init(struct wiimote_data *wdata)

{

	struct wiimote_ext *ext;

	unsigned long flags;

	int ret;



	ext = kzalloc(sizeof(*ext), GFP_KERNEL);

	if (!ext)
@@ -212,11 +248,19 @@ int wiiext_init(struct wiimote_data *wdata) 
	ext->wdata = wdata;

	INIT_WORK(&ext->worker, wiiext_worker);



	ret = device_create_file(&wdata->hdev->dev, &dev_attr_extension);

	if (ret)

		goto err;



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

	wdata->ext = ext;

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



	return 0;



err:

	kfree(ext);

	return ret;

}



/* Deinitializes the extension driver of a wiimote */
@@ -240,6 +284,8 @@ void wiiext_deinit(struct wiimote_data *wdata) 
	wdata->ext = NULL;

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



	device_remove_file(&wdata->hdev->dev, &dev_attr_extension);



	cancel_work_sync(&ext->worker);

	kfree(ext);

}