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Commit 5ad67fbc authored by David Herrmann's avatar David Herrmann Committed by Jiri Kosina
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HID: wiimote: Add Nintendo Balance-Board support 



The Nintendo Balance-Board is a controller which behaves exactly like the
Wii Remote but reports all its data through a special extension device.
Hence, we can simply add the Balance-Board as extension device and we get
full support for it.

Tested-by: default avatarFlorian Echtler <floe@butterbrot.org>
Signed-off-by: default avatarDavid Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 5b6e7f1c

drivers/hid/hid-wiimote-ext.c

+59 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ enum wiiext_type { 
	WIIEXT_NONE,		/* placeholder */

	WIIEXT_CLASSIC,		/* Nintendo classic controller */

	WIIEXT_NUNCHUCK,	/* Nintendo nunchuck controller */

	WIIEXT_BALANCE_BOARD,	/* Nintendo balance board controller */

};



enum wiiext_keys {
@@ -151,6 +152,8 @@ static __u8 ext_read(struct wiimote_ext *ext) 
			type = WIIEXT_NUNCHUCK;

		else if (rmem[0] == 0x01 && rmem[1] == 0x01)

			type = WIIEXT_CLASSIC;

		else if (rmem[0] == 0x04 && rmem[1] == 0x02)

			type = WIIEXT_BALANCE_BOARD;

	}



	wiimote_cmd_release(ext->wdata);
@@ -509,6 +512,55 @@ static void handler_classic(struct wiimote_ext *ext, const __u8 *payload) 
	input_sync(ext->input);

}



static void handler_balance_board(struct wiimote_ext *ext, const __u8 *payload)

{

	__s32 val[4];



	/*   Byte |  8  7  6  5  4  3  2  1  |

	 *   -----+--------------------------+

	 *    1   |    Top Right <15:8>      |

	 *    2   |    Top Right  <7:0>      |

	 *   -----+--------------------------+

	 *    3   | Bottom Right <15:8>      |

	 *    4   | Bottom Right  <7:0>      |

	 *   -----+--------------------------+

	 *    5   |     Top Left <15:8>      |

	 *    6   |     Top Left  <7:0>      |

	 *   -----+--------------------------+

	 *    7   |  Bottom Left <15:8>      |

	 *    8   |  Bottom Left  <7:0>      |

	 *   -----+--------------------------+

	 *

	 * These values represent the weight-measurements of the Wii-balance

	 * board with 16bit precision.

	 *

	 * The balance-board is never reported interleaved with motionp.

	 */



	val[0] = payload[0];

	val[0] <<= 8;

	val[0] |= payload[1];



	val[1] = payload[2];

	val[1] <<= 8;

	val[1] |= payload[3];



	val[2] = payload[4];

	val[2] <<= 8;

	val[2] |= payload[5];



	val[3] = payload[6];

	val[3] <<= 8;

	val[3] |= payload[7];



	input_report_abs(ext->input, ABS_HAT0X, val[0]);

	input_report_abs(ext->input, ABS_HAT0Y, val[1]);

	input_report_abs(ext->input, ABS_HAT1X, val[2]);

	input_report_abs(ext->input, ABS_HAT1Y, val[3]);



	input_sync(ext->input);

}



/* call this with state.lock spinlock held */

void wiiext_handle(struct wiimote_data *wdata, const __u8 *payload)

{
@@ -523,6 +575,8 @@ void wiiext_handle(struct wiimote_data *wdata, const __u8 *payload) 
		handler_nunchuck(ext, payload);

	} else if (ext->ext_type == WIIEXT_CLASSIC) {

		handler_classic(ext, payload);

	} else if (ext->ext_type == WIIEXT_BALANCE_BOARD) {

		handler_balance_board(ext, payload);

	}

}
@@ -551,6 +605,11 @@ static ssize_t wiiext_show(struct device *dev, struct device_attribute *attr, 
			return sprintf(buf, "motionp+classic\n");

		else

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

	} else if (type == WIIEXT_BALANCE_BOARD) {

		if (motionp)

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

		else

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

	} else {

		if (motionp)

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