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HID: wiimote: Parse classic controller data
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Nintendo Classic Controller extension reports lots of keys, two analog sticks
and two analog buttons. We report all data through extension input device to
userspace.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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David Herrmann authored and Jiri Kosina committed Nov 22, 2011
1 parent a535350 commit 5906215
Showing 1 changed file with 156 additions and 0 deletions.
156 changes: 156 additions & 0 deletions drivers/hid/hid-wiimote-ext.c
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Original file line number Diff line number Diff line change
Expand Up @@ -39,12 +39,42 @@ enum wiiext_type {
enum wiiext_keys {
WIIEXT_KEY_C,
WIIEXT_KEY_Z,
WIIEXT_KEY_A,
WIIEXT_KEY_B,
WIIEXT_KEY_X,
WIIEXT_KEY_Y,
WIIEXT_KEY_ZL,
WIIEXT_KEY_ZR,
WIIEXT_KEY_PLUS,
WIIEXT_KEY_MINUS,
WIIEXT_KEY_HOME,
WIIEXT_KEY_LEFT,
WIIEXT_KEY_RIGHT,
WIIEXT_KEY_UP,
WIIEXT_KEY_DOWN,
WIIEXT_KEY_LT,
WIIEXT_KEY_RT,
WIIEXT_KEY_COUNT
};

static __u16 wiiext_keymap[] = {
BTN_C, /* WIIEXT_KEY_C */
BTN_Z, /* WIIEXT_KEY_Z */
BTN_A, /* WIIEXT_KEY_A */
BTN_B, /* WIIEXT_KEY_B */
BTN_X, /* WIIEXT_KEY_X */
BTN_Y, /* WIIEXT_KEY_Y */
BTN_TL2, /* WIIEXT_KEY_ZL */
BTN_TR2, /* WIIEXT_KEY_ZR */
KEY_NEXT, /* WIIEXT_KEY_PLUS */
KEY_PREVIOUS, /* WIIEXT_KEY_MINUS */
BTN_MODE, /* WIIEXT_KEY_HOME */
KEY_LEFT, /* WIIEXT_KEY_LEFT */
KEY_RIGHT, /* WIIEXT_KEY_RIGHT */
KEY_UP, /* WIIEXT_KEY_UP */
KEY_DOWN, /* WIIEXT_KEY_DOWN */
BTN_TL, /* WIIEXT_KEY_LT */
BTN_TR, /* WIIEXT_KEY_RT */
};

/* diable all extensions */
Expand Down Expand Up @@ -363,6 +393,120 @@ static void handler_nunchuck(struct wiimote_ext *ext, const __u8 *payload)

static void handler_classic(struct wiimote_ext *ext, const __u8 *payload)
{
__s8 rx, ry, lx, ly, lt, rt;

/* Byte | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 1 | RX <5:4> | LX <5:0> |
* 2 | RX <3:2> | LY <5:0> |
* -----+-----+-----+-----+-----------------------------+
* 3 |RX<1>| LT <5:4> | RY <5:1> |
* -----+-----+-----------+-----------------------------+
* 4 | LT <3:1> | RT <5:1> |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 5 | BDR | BDD | BLT | B- | BH | B+ | BRT | 1 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 6 | BZL | BB | BY | BA | BX | BZR | BDL | BDU |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* All buttons are 0 if pressed
* RX and RY are right analog stick
* LX and LY are left analog stick
* LT is left trigger, RT is right trigger
* BLT is 0 if left trigger is fully pressed
* BRT is 0 if right trigger is fully pressed
* BDR, BDD, BDL, BDU form the D-Pad with right, down, left, up buttons
* BZL is left Z button and BZR is right Z button
* B-, BH, B+ are +, HOME and - buttons
* BB, BY, BA, BX are A, B, X, Y buttons
* LSB of RX, RY, LT, and RT are not transmitted and always 0.
*
* With motionp enabled it changes slightly to this:
* Byte | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 1 | RX <4:3> | LX <5:1> | BDU |
* 2 | RX <2:1> | LY <5:1> | BDL |
* -----+-----+-----+-----+-----------------------+-----+
* 3 |RX<0>| LT <4:3> | RY <4:0> |
* -----+-----+-----------+-----------------------------+
* 4 | LT <2:0> | RT <4:0> |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 5 | BDR | BDD | BLT | B- | BH | B+ | BRT | EXT |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* 6 | BZL | BB | BY | BA | BX | BZR | 0 | 0 |
* -----+-----+-----+-----+-----+-----+-----+-----+-----+
* Only the LSBs of LX and LY are lost. BDU and BDL are moved, the rest
* is the same as before.
*/

if (ext->motionp) {
lx = payload[0] & 0x3e;
ly = payload[0] & 0x3e;
} else {
lx = payload[0] & 0x3f;
ly = payload[0] & 0x3f;
}

rx = (payload[0] >> 3) & 0x14;
rx |= (payload[1] >> 5) & 0x06;
rx |= (payload[2] >> 7) & 0x01;
ry = payload[2] & 0x1f;

rt = payload[3] & 0x1f;
lt = (payload[2] >> 2) & 0x18;
lt |= (payload[3] >> 5) & 0x07;

rx <<= 1;
ry <<= 1;
rt <<= 1;
lt <<= 1;

input_report_abs(ext->input, ABS_HAT1X, lx - 0x20);
input_report_abs(ext->input, ABS_HAT1Y, ly - 0x20);
input_report_abs(ext->input, ABS_HAT2X, rx - 0x20);
input_report_abs(ext->input, ABS_HAT2Y, ry - 0x20);
input_report_abs(ext->input, ABS_HAT3X, rt - 0x20);
input_report_abs(ext->input, ABS_HAT3Y, lt - 0x20);

input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_RIGHT],
!!(payload[4] & 0x80));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_DOWN],
!!(payload[4] & 0x40));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_LT],
!!(payload[4] & 0x20));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_MINUS],
!!(payload[4] & 0x10));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_HOME],
!!(payload[4] & 0x08));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_PLUS],
!!(payload[4] & 0x04));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_RT],
!!(payload[4] & 0x02));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_ZL],
!!(payload[5] & 0x80));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_B],
!!(payload[5] & 0x40));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_Y],
!!(payload[5] & 0x20));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_A],
!!(payload[5] & 0x10));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_X],
!!(payload[5] & 0x08));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_ZR],
!!(payload[5] & 0x04));

if (ext->motionp) {
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_UP],
!!(payload[0] & 0x01));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_LEFT],
!!(payload[1] & 0x01));
} else {
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_UP],
!!(payload[5] & 0x01));
input_report_key(ext->input, wiiext_keymap[WIIEXT_KEY_LEFT],
!!(payload[5] & 0x02));
}

input_sync(ext->input);
}

/* call this with state.lock spinlock held */
Expand Down Expand Up @@ -502,8 +646,20 @@ int wiiext_init(struct wiimote_data *wdata)
set_bit(EV_ABS, ext->input->evbit);
set_bit(ABS_HAT0X, ext->input->absbit);
set_bit(ABS_HAT0Y, ext->input->absbit);
set_bit(ABS_HAT1X, ext->input->absbit);
set_bit(ABS_HAT1Y, ext->input->absbit);
set_bit(ABS_HAT2X, ext->input->absbit);
set_bit(ABS_HAT2Y, ext->input->absbit);
set_bit(ABS_HAT3X, ext->input->absbit);
set_bit(ABS_HAT3Y, ext->input->absbit);
input_set_abs_params(ext->input, ABS_HAT0X, -120, 120, 2, 4);
input_set_abs_params(ext->input, ABS_HAT0Y, -120, 120, 2, 4);
input_set_abs_params(ext->input, ABS_HAT1X, -30, 30, 1, 1);
input_set_abs_params(ext->input, ABS_HAT1Y, -30, 30, 1, 1);
input_set_abs_params(ext->input, ABS_HAT2X, -30, 30, 1, 1);
input_set_abs_params(ext->input, ABS_HAT2Y, -30, 30, 1, 1);
input_set_abs_params(ext->input, ABS_HAT3X, -30, 30, 1, 1);
input_set_abs_params(ext->input, ABS_HAT3Y, -30, 30, 1, 1);
set_bit(ABS_RX, ext->input->absbit);
set_bit(ABS_RY, ext->input->absbit);
set_bit(ABS_RZ, ext->input->absbit);
Expand Down

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