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HID: wiimote: Add Nintendo Balance-Board support

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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: Florian Echtler <floe@butterbrot.org>
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann 2012-09-17 12:31:35 +02:00 committed by Jiri Kosina
parent 5b6e7f1c16
commit 5ad67fbc2a
1 changed files with 59 additions and 0 deletions
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59
drivers/hid/hid-wiimote-ext.c
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@ -34,6 +34,7 @@ enum wiiext_type {
WIIEXT_NONE, /* placeholder */ WIIEXT_NONE, /* placeholder */
WIIEXT_CLASSIC, /* Nintendo classic controller */ WIIEXT_CLASSIC, /* Nintendo classic controller */
WIIEXT_NUNCHUCK, /* Nintendo nunchuck controller */ WIIEXT_NUNCHUCK, /* Nintendo nunchuck controller */
WIIEXT_BALANCE_BOARD, /* Nintendo balance board controller */
}; };
enum wiiext_keys { enum wiiext_keys {
@ -151,6 +152,8 @@ static __u8 ext_read(struct wiimote_ext *ext)
type = WIIEXT_NUNCHUCK; type = WIIEXT_NUNCHUCK;
else if (rmem[0] == 0x01 && rmem[1] == 0x01) else if (rmem[0] == 0x01 && rmem[1] == 0x01)
type = WIIEXT_CLASSIC; type = WIIEXT_CLASSIC;
else if (rmem[0] == 0x04 && rmem[1] == 0x02)
type = WIIEXT_BALANCE_BOARD;
} }
wiimote_cmd_release(ext->wdata); wiimote_cmd_release(ext->wdata);
@ -509,6 +512,55 @@ static void handler_classic(struct wiimote_ext *ext, const __u8 *payload)
input_sync(ext->input); 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 */ /* call this with state.lock spinlock held */
void wiiext_handle(struct wiimote_data *wdata, const __u8 *payload) 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); handler_nunchuck(ext, payload);
} else if (ext->ext_type == WIIEXT_CLASSIC) { } else if (ext->ext_type == WIIEXT_CLASSIC) {
handler_classic(ext, payload); 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"); return sprintf(buf, "motionp+classic\n");
else else
return sprintf(buf, "classic\n"); 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 { } else {
if (motionp) if (motionp)
return sprintf(buf, "motionp\n"); return sprintf(buf, "motionp\n");