HID: wiimote: add Nunchuk support
This moves the nunchuk parser over to an extension module. This allows to make use of hotplugged Nunchuks instead of the old static parser. Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann
committed by
Jiri Kosina
Jiri Kosina
parent
f1d4bed45b
commit
b6ee67b37c
@@ -788,6 +788,203 @@ static const struct wiimod_ops wiimod_ir = {
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.in_ir = wiimod_ir_in_ir,
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};
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/*
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* Nunchuk Extension
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* The Nintendo Wii Nunchuk was the first official extension published by
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* Nintendo. It provides two additional keys and a separate accelerometer. It
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* can be hotplugged to standard Wii Remotes.
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*/
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enum wiimod_nunchuk_keys {
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WIIMOD_NUNCHUK_KEY_C,
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WIIMOD_NUNCHUK_KEY_Z,
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WIIMOD_NUNCHUK_KEY_NUM,
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};
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static const __u16 wiimod_nunchuk_map[] = {
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BTN_C, /* WIIMOD_NUNCHUK_KEY_C */
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BTN_Z, /* WIIMOD_NUNCHUK_KEY_Z */
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};
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static void wiimod_nunchuk_in_ext(struct wiimote_data *wdata, const __u8 *ext)
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{
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__s16 x, y, z, bx, by;
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/* Byte | 8 7 | 6 5 | 4 3 | 2 | 1 |
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* -----+----------+---------+---------+----+-----+
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* 1 | Button X <7:0> |
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* 2 | Button Y <7:0> |
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* -----+----------+---------+---------+----+-----+
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* 3 | Speed X <9:2> |
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* 4 | Speed Y <9:2> |
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* 5 | Speed Z <9:2> |
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* -----+----------+---------+---------+----+-----+
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* 6 | Z <1:0> | Y <1:0> | X <1:0> | BC | BZ |
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* -----+----------+---------+---------+----+-----+
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* Button X/Y is the analog stick. Speed X, Y and Z are the
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* accelerometer data in the same format as the wiimote's accelerometer.
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* The 6th byte contains the LSBs of the accelerometer data.
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* BC and BZ are the C and Z buttons: 0 means pressed
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*
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* If reported interleaved with motionp, then the layout changes. The
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* 5th and 6th byte changes to:
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* -----+-----------------------------------+-----+
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* 5 | Speed Z <9:3> | EXT |
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* -----+--------+-----+-----+----+----+----+-----+
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* 6 |Z <2:1> |Y <1>|X <1>| BC | BZ | 0 | 0 |
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* -----+--------+-----+-----+----+----+----+-----+
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* All three accelerometer values lose their LSB. The other data is
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* still available but slightly moved.
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*
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* Center data for button values is 128. Center value for accelerometer
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* values it 512 / 0x200
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*/
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bx = ext[0];
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by = ext[1];
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bx -= 128;
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by -= 128;
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x = ext[2] << 2;
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y = ext[3] << 2;
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z = ext[4] << 2;
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if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
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x |= (ext[5] >> 3) & 0x02;
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y |= (ext[5] >> 4) & 0x02;
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z &= ~0x4;
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z |= (ext[5] >> 5) & 0x06;
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} else {
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x |= (ext[5] >> 2) & 0x03;
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y |= (ext[5] >> 4) & 0x03;
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z |= (ext[5] >> 6) & 0x03;
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}
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x -= 0x200;
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y -= 0x200;
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z -= 0x200;
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input_report_abs(wdata->extension.input, ABS_HAT0X, bx);
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input_report_abs(wdata->extension.input, ABS_HAT0Y, by);
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input_report_abs(wdata->extension.input, ABS_RX, x);
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input_report_abs(wdata->extension.input, ABS_RY, y);
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input_report_abs(wdata->extension.input, ABS_RZ, z);
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if (wdata->state.flags & WIIPROTO_FLAG_MP_ACTIVE) {
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input_report_key(wdata->extension.input,
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wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_Z],
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!(ext[5] & 0x04));
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input_report_key(wdata->extension.input,
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wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_C],
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!(ext[5] & 0x08));
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} else {
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input_report_key(wdata->extension.input,
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wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_Z],
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!(ext[5] & 0x01));
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input_report_key(wdata->extension.input,
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wiimod_nunchuk_map[WIIMOD_NUNCHUK_KEY_C],
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!(ext[5] & 0x02));
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}
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input_sync(wdata->extension.input);
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}
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static int wiimod_nunchuk_open(struct input_dev *dev)
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{
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struct wiimote_data *wdata = input_get_drvdata(dev);
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unsigned long flags;
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spin_lock_irqsave(&wdata->state.lock, flags);
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wdata->state.flags |= WIIPROTO_FLAG_EXT_USED;
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wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
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spin_unlock_irqrestore(&wdata->state.lock, flags);
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return 0;
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}
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static void wiimod_nunchuk_close(struct input_dev *dev)
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{
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struct wiimote_data *wdata = input_get_drvdata(dev);
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unsigned long flags;
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spin_lock_irqsave(&wdata->state.lock, flags);
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wdata->state.flags &= ~WIIPROTO_FLAG_EXT_USED;
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wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
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spin_unlock_irqrestore(&wdata->state.lock, flags);
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}
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static int wiimod_nunchuk_probe(const struct wiimod_ops *ops,
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struct wiimote_data *wdata)
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{
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int ret, i;
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wdata->extension.input = input_allocate_device();
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if (!wdata->extension.input)
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return -ENOMEM;
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input_set_drvdata(wdata->extension.input, wdata);
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wdata->extension.input->open = wiimod_nunchuk_open;
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wdata->extension.input->close = wiimod_nunchuk_close;
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wdata->extension.input->dev.parent = &wdata->hdev->dev;
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wdata->extension.input->id.bustype = wdata->hdev->bus;
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wdata->extension.input->id.vendor = wdata->hdev->vendor;
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wdata->extension.input->id.product = wdata->hdev->product;
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wdata->extension.input->id.version = wdata->hdev->version;
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wdata->extension.input->name = WIIMOTE_NAME " Nunchuk";
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set_bit(EV_KEY, wdata->extension.input->evbit);
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for (i = 0; i < WIIMOD_NUNCHUK_KEY_NUM; ++i)
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set_bit(wiimod_nunchuk_map[i],
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wdata->extension.input->keybit);
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set_bit(EV_ABS, wdata->extension.input->evbit);
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set_bit(ABS_HAT0X, wdata->extension.input->absbit);
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set_bit(ABS_HAT0Y, wdata->extension.input->absbit);
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input_set_abs_params(wdata->extension.input,
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ABS_HAT0X, -120, 120, 2, 4);
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input_set_abs_params(wdata->extension.input,
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ABS_HAT0Y, -120, 120, 2, 4);
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set_bit(ABS_RX, wdata->extension.input->absbit);
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set_bit(ABS_RY, wdata->extension.input->absbit);
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set_bit(ABS_RZ, wdata->extension.input->absbit);
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input_set_abs_params(wdata->extension.input,
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ABS_RX, -500, 500, 2, 4);
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input_set_abs_params(wdata->extension.input,
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ABS_RY, -500, 500, 2, 4);
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input_set_abs_params(wdata->extension.input,
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ABS_RZ, -500, 500, 2, 4);
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ret = input_register_device(wdata->extension.input);
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if (ret)
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goto err_free;
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return 0;
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err_free:
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input_free_device(wdata->extension.input);
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wdata->extension.input = NULL;
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return ret;
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}
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static void wiimod_nunchuk_remove(const struct wiimod_ops *ops,
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struct wiimote_data *wdata)
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{
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if (!wdata->extension.input)
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return;
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input_unregister_device(wdata->extension.input);
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wdata->extension.input = NULL;
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}
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static const struct wiimod_ops wiimod_nunchuk = {
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.flags = 0,
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.arg = 0,
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.probe = wiimod_nunchuk_probe,
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.remove = wiimod_nunchuk_remove,
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.in_ext = wiimod_nunchuk_in_ext,
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};
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/*
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* Balance Board Extension
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* The Nintendo Wii Balance Board provides four hardware weight sensor plus a
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@@ -1026,5 +1223,6 @@ const struct wiimod_ops *wiimod_table[WIIMOD_NUM] = {
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const struct wiimod_ops *wiimod_ext_table[WIIMOTE_EXT_NUM] = {
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[WIIMOTE_EXT_NONE] = &wiimod_dummy,
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[WIIMOTE_EXT_UNKNOWN] = &wiimod_dummy,
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[WIIMOTE_EXT_NUNCHUK] = &wiimod_nunchuk,
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[WIIMOTE_EXT_BALANCE_BOARD] = &wiimod_bboard,
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};
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