add mouse mode mouse compatability

separate 3 modes: media, WASD, mouse

g29-wheel/g29_usb.c

@@ -25,47 +25,49 @@
 #include <linux/jiffies.h>
 #include <linux/hid.h>
 
+#include "g29_usb.h"
+
 MODULE_AUTHOR("LLP group 16");
 MODULE_DESCRIPTION("Logitech G29 USB driver");
 MODULE_LICENSE("GPL");
 
-#define USB_VENDOR_ID_LOGITECH      0x046d
-#define USB_DEVICE_ID_LOGITECH_G29  0xc24f
-#define USB_DEVICE_ID_LOGITECH_G29_ALT 0xc260
-
-#define G29_BTN_PLUS        0x00800000u
-#define G29_BTN_MINUS       0x01000000u
-#define G29_BTN_RED_CW      0x02000000u
-#define G29_BTN_RED_CCW     0x04000000u
-#define G29_BTN_RETURN      0x08000000u
-#define G29_BTN_R1          0x00000100u
-#define G29_BTN_L1          0x00000200u
-
 enum g29_mode {
 	G29_MODE_MEDIA = 0,
+	G29_MODE_WASD = 1,
+	G29_MODE_MOUSE = 2,
 };
 
 static int mode = G29_MODE_MEDIA;
-module_param(mode, int, 0444);
+module_param(mode, int, 0644);
-MODULE_PARM_DESC(mode, "Mapping mode (0=MEDIA)");
+MODULE_PARM_DESC(mode, "Initial mode (0=MEDIA, 1=WASD, 2=MOUSE)");
 
-struct g29_state {
+/* Steering curve exponent (100 = linear, 200 = squared, 150 = ^1.5)
-	u32 buttons_le;
+ * Higher values reduce sensitivity at low steering angles.
-	u16 rot_le;
+ */
-	u8 gas;
+static int steer_curve = 200;
-	u8 brk;
+module_param(steer_curve, int, 0644);
-	u8 clt;
+MODULE_PARM_DESC(steer_curve, "Steering sensitivity curve (100=linear, 200=squared, default=200)");
-	u8 gr_x;
-	u8 gr_y;
-	u8 gr_z;
-};
 
-struct g29_keymap_edge {
+static int steer_deadzone = 10;
+module_param(steer_deadzone, int, 0644);
+MODULE_PARM_DESC(steer_deadzone, "Steering deadzone radius from center (default=10)");
+
+static int gas_curve = 100;
+module_param(gas_curve, int, 0644);
+MODULE_PARM_DESC(gas_curve, "Gas pedal sensitivity curve (100=linear, 200=squared, default=200)");
+
+static int clutch_curve = 100;
+module_param(clutch_curve, int, 0644);
+MODULE_PARM_DESC(clutch_curve, "Clutch pedal sensitivity curve (100=linear, 200=squared, default=200)");
+
+#define NORMALIZATION_PRECISION 1000
+
+struct g29_keymap {
 	u32 mask;
 	unsigned short keycode;
 };
 
-static const struct g29_keymap_edge g29_media_edge_map[] = {
+static const struct g29_keymap media_mode_keymap[] = {
 	/* Red rotary = volume */
 	{ G29_BTN_RED_CW,  KEY_VOLUMEUP },
 	{ G29_BTN_RED_CCW, KEY_VOLUMEDOWN },
@@ -78,6 +80,13 @@ static const struct g29_keymap_edge g29_media_edge_map[] = {
 	{ G29_BTN_L1,   KEY_PREVIOUSSONG },
 };
 
+static const struct g29_keymap mouse_mode_keymap[] = {
+	{ G29_BTN_X,      BTN_LEFT },
+	{ G29_BTN_CIRCLE, BTN_RIGHT },
+	{ G29_BTN_TRIANGLE, BTN_MIDDLE },
+	{ G29_BTN_SQUARE, BTN_SIDE },
+};
+
 struct g29_dev {
 	char name[128];
 	char phys[64];
@@ -93,46 +102,310 @@ struct g29_dev {
 	int endpoint;
 
 	struct timer_list steer_timer;
+	struct timer_list mouse_timer;
 	u32 steer_phase_ms;
 
+	u32 phase_accumulator;
+	u32 gas_phase_accumulator;
+	u32 clutch_phase_accumulator;
+
+	enum g29_mode current_mode;
 	struct g29_state last;
 };
 
 
-static void g29_steer_timer_fn(struct timer_list *t) {
+
+static void g29_switch_mode(struct g29_dev *g29, enum g29_mode new_mode) {
+	if (g29->current_mode == new_mode)
+		return;
+
+	/* Stop timers when leaving modes */
+	if (g29->current_mode == G29_MODE_WASD) {
+		timer_delete_sync(&g29->steer_timer);
+	}
+	if (g29->current_mode == G29_MODE_MOUSE) {
+		timer_delete_sync(&g29->mouse_timer);
+	}
+
+	g29->current_mode = new_mode;
+	g29->phase_accumulator = 0;
+	g29->gas_phase_accumulator = 0;
+	g29->clutch_phase_accumulator = 0;
+
+	/* Start timers when entering modes */
+	if (new_mode == G29_MODE_WASD) {
+		mod_timer(&g29->steer_timer, jiffies + msecs_to_jiffies(2));
+	}
+	if (new_mode == G29_MODE_MOUSE) {
+		mod_timer(&g29->mouse_timer, jiffies + msecs_to_jiffies(10));
+	}
+
+	dev_info(&g29->udev->dev, "Switched to mode: %s\n",
+		 new_mode == G29_MODE_MEDIA ? "MEDIA" :
+		 new_mode == G29_MODE_WASD ? "WASD" : "MOUSE");
+}
+
+static int calc_adjusted_steering_distance(int distance) {
+	/* Apply non-linear steering curve:
+	 * adjusted = (distance / MAX)^(curve/100) * MAX
+	 *
+	 * For curve=200 (squared): 5% input -> 0.25% output, 50% -> 25%, 100% -> 100%
+	 * For curve=150 (^1.5):    5% input -> ~1.1% output, 50% -> ~35%, 100% -> 100%
+	 * For curve=100 (linear):  5% input -> 5% output (no change)
+	 *
+	 * Using integer math: adjusted = (distance^2 / MAX) for curve=200
+	 */
+	if (steer_curve == 100) {
+		return distance;
+	}
+	if (steer_curve == 200) {
+		return(distance * distance) / WHEEL_MAX_DIST;
+	}
+
+	/* Generic power curve using normalized values (0-1000 range for precision)
+	 * normalized = (distance * 1000) / WHEEL_MAX_DIST
+	 * Apply power approximation, then scale back
+	 */
+	int normalized = (distance * NORMALIZATION_PRECISION) / WHEEL_MAX_DIST;
+	int powered;
+
+	if (steer_curve == 150) {
+		/* Approximate ^1.5 with (x * sqrt(x)) */
+		int sqrt_norm = int_sqrt(normalized * NORMALIZATION_PRECISION);
+		powered = (normalized * sqrt_norm) / NORMALIZATION_PRECISION;
+	} else {
+		/* Fallback: squared for any other value > 100 */
+		powered = (normalized * normalized) / NORMALIZATION_PRECISION;
+	}
+
+	return (powered * WHEEL_MAX_DIST) / NORMALIZATION_PRECISION;
+}
+
+static int calc_adjusted_pedal_distance(int pedal_pressure, int curve) {
+	if (curve == 100) {
+		return pedal_pressure;
+	}
+	if (curve == 200) {
+		return (pedal_pressure * pedal_pressure) / G29_PEDAL_RELEASED;
+	}
+
+	int normalized = (pedal_pressure * NORMALIZATION_PRECISION) / G29_PEDAL_RELEASED;
+	int powered;
+
+	if (curve == 150) {
+		int sqrt_norm = int_sqrt(normalized * NORMALIZATION_PRECISION);
+		powered = (normalized * sqrt_norm) / NORMALIZATION_PRECISION;
+	} else {
+		powered = (normalized * normalized) / NORMALIZATION_PRECISION;
+	}
+
+	return (powered * G29_PEDAL_RELEASED) / NORMALIZATION_PRECISION;
+}
+
+static void mouse_mode_timer_fn(struct timer_list *t) {
+	struct g29_dev *g29 = timer_container_of(g29, t, mouse_timer);
+
+	const int rot = le16_to_cpu(g29->last.rot_le);
+	int gas_pressure = G29_PEDAL_RELEASED - g29->last.gas;
+	int clutch_pressure = G29_PEDAL_RELEASED - g29->last.clt;
+	
+	/* Calculate speed: positive for forward (gas), negative for backward (clutch) */
+	int speed = gas_pressure - clutch_pressure;
+	
+	/* Apply deadzone to steering */
+	int effective_rot = rot;
+	if (abs(rot - WHEEL_CENTER) <= steer_deadzone) {
+		effective_rot = WHEEL_CENTER;
+	}
+	
+	/* Calculate angle from wheel rotation
+	 * Map wheel rotation to angle: 
+	 * - Center (32768) = 0° (straight forward)
+	 * - Full left (0) = -180° (reverse)
+	 * - Full right (65535) = +180° (reverse)
+	 * We normalize to -1000 to +1000 representing -π to +π radians
+	 */
+	int angle_normalized = ((effective_rot - WHEEL_CENTER) * 1000) / WHEEL_CENTER;
+	
+	/* Clamp angle to prevent overflow */
+	if (angle_normalized > 1000) angle_normalized = 1000;
+	if (angle_normalized < -1000) angle_normalized = -1000;
+	
+	/* Calculate movement components using better trigonometric approximations:
+	 * dx = sin(angle) * speed
+	 * dy = cos(angle) * speed
+	 * 
+	 * sin(x) ≈ x - x³/6  (Taylor series)
+	 * cos(x) ≈ 1 - x²/2 + x⁴/24  (Taylor series)
+	 * 
+	 * For angle_normalized in [-1000, 1000] representing [-π, +π]:
+	 * This gives us full reverse when fully steered
+	 */
+	long angle_cubed = ((long)angle_normalized * angle_normalized * angle_normalized) / 1000000;
+	int sin_approx = (angle_normalized * 1000 - angle_cubed / 6) / 1000;
+	
+	long angle_squared = ((long)angle_normalized * angle_normalized) / 1000;
+	long angle_fourth = (angle_squared * angle_squared) / 1000;
+	int cos_approx = 1000 - angle_squared / 2 + angle_fourth / 24;
+	
+	int dx = (sin_approx * speed) / 1000;
+	int dy = -(cos_approx * speed) / 1000;  /* Negative because forward is -Y */
+	
+	/* Scale down the movement for reasonable mouse speed */
+	int scaled_dx = dx / 50;
+	int scaled_dy = dy / 50;
+	
+	/* Report mouse movement if there's any */
+	if (scaled_dx != 0 || scaled_dy != 0) {
+		input_report_rel(g29->input, REL_X, scaled_dx);
+		input_report_rel(g29->input, REL_Y, scaled_dy);
+		input_sync(g29->input);
+	}
+	
+	/* Reschedule timer if still in mouse mode */
+	if (g29->current_mode == G29_MODE_MOUSE)
+		mod_timer(&g29->mouse_timer, jiffies + msecs_to_jiffies(10));
+}
+static void wasd_mode_timer_fn(struct timer_list *t) {
 	struct g29_dev *g29 = timer_container_of(g29, t, steer_timer);
 
 	const int rot = le16_to_cpu(g29->last.rot_le);
 	
-	input_report_key(g29->input, KEY_W, g29->last.gas <= 0x80);
+	int effective_rot = rot;
-	input_report_key(g29->input, KEY_S, g29->last.clt <= 0x80);
+	int distance_from_center = abs(rot - WHEEL_CENTER);
-	input_report_key(g29->input, KEY_A, rot <= 0x6000);
+	if (distance_from_center <= steer_deadzone) {
-	input_report_key(g29->input, KEY_D, rot >= 0xA000);
+		effective_rot = WHEEL_CENTER;
+	}
 	
+	int distance_to_center = abs(effective_rot - WHEEL_CENTER);
+	int adjusted_distance = calc_adjusted_steering_distance(distance_to_center);
+
+	/* Phase accumulator approach:
+	 * Accumulate the adjusted distance on each tick.
+	 * When it exceeds the max distance, press the key and wrap.
+	 * This gives us a duty cycle of (adjusted_distance / WHEEL_MAX_DIST).
+	 *
+	 * Examples (with curve=200):
+	 *   5% steering  -> ~0.25% press rate
+	 *   50% steering -> 25% press rate
+	 *   100% steering -> 100% press rate (every tick)
+	 */
+	g29->phase_accumulator += adjusted_distance;
+
+	bool press_key;
+	if (g29->phase_accumulator >= WHEEL_MAX_DIST) {
+		g29->phase_accumulator -= WHEEL_MAX_DIST;
+		press_key = true;
+	} else {
+		press_key = false;
+	}
+
+	input_report_key(g29->input, KEY_A, press_key && (effective_rot < WHEEL_CENTER));
+	input_report_key(g29->input, KEY_D, press_key && (effective_rot >= WHEEL_CENTER));
+
+	/* Gas pedal (0xFF=up, 0x00=down) -> W key */
+	int gas_pressure = 0xFF - g29->last.gas;
+	int gas_adjusted = calc_adjusted_pedal_distance(gas_pressure, gas_curve);
+	g29->gas_phase_accumulator += gas_adjusted;
+
+	bool press_w = false;
+	if (g29->gas_phase_accumulator >= G29_PEDAL_RELEASED) {
+		g29->gas_phase_accumulator -= G29_PEDAL_RELEASED;
+		press_w = true;
+	}
+
+	/* Clutch pedal (0xFF=up, 0x00=down) -> S key */
+	int clutch_pressure = 0xFF - g29->last.clt;
+	int clutch_adjusted = calc_adjusted_pedal_distance(clutch_pressure, clutch_curve);
+	g29->clutch_phase_accumulator += clutch_adjusted;
+
+	bool press_s = false;
+	if (g29->clutch_phase_accumulator >= G29_PEDAL_RELEASED) {
+		g29->clutch_phase_accumulator -= G29_PEDAL_RELEASED;
+		press_s = true;
+	}
+
+	input_report_key(g29->input, KEY_W, press_w);
+	input_report_key(g29->input, KEY_S, press_s);
+
+	input_sync(g29->input);
+
+	if (g29->current_mode == G29_MODE_WASD)
 		mod_timer(&g29->steer_timer, jiffies + msecs_to_jiffies(2));
 }
 
-static void g29_apply_media_mode(struct g29_dev *g29, const struct g29_state *cur, const struct g29_state *prev) {
+static void process_media_mode(struct g29_dev *g29, const struct g29_state *cur, const struct g29_state *prev) {
-	u32 pressed = le32_to_cpu(cur->buttons_le & ~prev->buttons_le);
+	const u32 pressed = le32_to_cpu(cur->buttons_le & ~prev->buttons_le);
-	for (int i = 0; i < ARRAY_SIZE(g29_media_edge_map); i++) {
+	const u32 released = le32_to_cpu(~cur->buttons_le & prev->buttons_le);
-		const struct g29_keymap_edge *e = &g29_media_edge_map[i];
+	for (int i = 0; i < ARRAY_SIZE(media_mode_keymap); i++) {
-		if (pressed & e->mask) {
+		const struct g29_keymap *k = &media_mode_keymap[i];
-			input_report_key(g29->input, e->keycode, 1);
+		if (pressed & k->mask) {
-			input_report_key(g29->input, e->keycode, 0);
+			input_report_key(g29->input, k->keycode, 1);
+		}
+		if (released & k->mask) {
+			input_report_key(g29->input, k->keycode, 0);
+		}
+	}
+	input_sync(g29->input);
+}
+
+static void process_wasd_mode(struct g29_dev *g29, const struct g29_state *cur, const struct g29_state *prev) {
+	/* WASD mode is handled by the timer function (g29_steer_timer_fn) */
+	/* No additional processing needed here */
+}
+
+static void process_mouse_mode(struct g29_dev *g29, const struct g29_state *cur, const struct g29_state *prev) {
+	const u32 pressed = le32_to_cpu(cur->buttons_le & ~prev->buttons_le);
+	const u32 released = le32_to_cpu(~cur->buttons_le & prev->buttons_le);
+
+	for (int i = 0; i < ARRAY_SIZE(mouse_mode_keymap); i++) {
+		const struct g29_keymap *k = &mouse_mode_keymap[i];
+		if (pressed & k->mask) {
+			input_report_key(g29->input, k->keycode, 1);
+		}
+		if (released & k->mask) {
+			input_report_key(g29->input, k->keycode, 0);
 		}
 	}
 
+	if (pressed & G29_BTN_RED_CW) {
+		input_report_rel(g29->input, REL_WHEEL, 1);
+	}
+	if (pressed & G29_BTN_RED_CCW) {
+		input_report_rel(g29->input, REL_WHEEL, -1);
+	}
+	
 	input_sync(g29->input);
 }
 
+static void g29_check_mode_switch(struct g29_dev *g29, const struct g29_state *cur, const struct g29_state *prev) {
+	u32 pressed = le32_to_cpu(cur->buttons_le & ~prev->buttons_le);
+	
+	if (pressed & G29_BTN_SHARE) {
+		g29_switch_mode(g29, G29_MODE_MEDIA);
+	} else if (pressed & G29_BTN_OPTION) {
+		g29_switch_mode(g29, G29_MODE_WASD);
+	} else if (pressed & G29_BTN_PS3_LOGO) {
+		g29_switch_mode(g29, G29_MODE_MOUSE);
+	}
+}
+
 static void g29_process_report(struct g29_dev *g29, const u8 *data, unsigned int len) {
 	if (len < 12) return;
 
 	struct g29_state *cur = (void *) data;
-	switch (mode) {
+	
+	g29_check_mode_switch(g29, cur, &g29->last);
+	
+	switch (g29->current_mode) {
 		case G29_MODE_MEDIA:
-	default:
+			process_media_mode(g29, cur, &g29->last);
-		g29_apply_media_mode(g29, cur, &g29->last);
+			break;
+		case G29_MODE_WASD:
+			process_wasd_mode(g29, cur, &g29->last);
+			break;
+		case G29_MODE_MOUSE:
+			process_mouse_mode(g29, cur, &g29->last);
 			break;
 	}
 
@@ -169,14 +442,19 @@ static int g29_input_open(struct input_dev *input) {
 	if (usb_submit_urb(g29->urb, GFP_KERNEL))
 		return -EIO;
 
-	mod_timer(&g29->steer_timer, jiffies + msecs_to_jiffies(2));
+	g29_switch_mode(g29, mode);
 
 	return 0;
 }
 
 static void g29_input_close(struct input_dev *input) {
 	struct g29_dev *g29 = input_get_drvdata(input);
+	
+	if (g29->current_mode == G29_MODE_WASD)
 		timer_delete_sync(&g29->steer_timer);
+	if (g29->current_mode == G29_MODE_MOUSE)
+		timer_delete_sync(&g29->mouse_timer);
+	
 	usb_kill_urb(g29->urb);
 }
 
@@ -216,8 +494,10 @@ static int g29_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	g29->maxp = usb_endpoint_maxp(ep);
 	g29->interval = ep->bInterval;
 	memset(&g29->last, 0, sizeof(g29->last));
+	g29->current_mode = mode;  /* Initialize to module parameter */
 
-	timer_setup(&g29->steer_timer, g29_steer_timer_fn, 0);
+	timer_setup(&g29->steer_timer, wasd_mode_timer_fn, 0);
+	timer_setup(&g29->mouse_timer, mouse_mode_timer_fn, 0);
 
 	if ((g29->buf = usb_alloc_coherent(udev, g29->maxp, GFP_KERNEL, &g29->buf_dma)) == NULL) {
 		ret = -ENOMEM;
@@ -251,19 +531,29 @@ static int g29_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	input->dev.parent = &intf->dev;
 
 	__set_bit(EV_KEY, input->evbit);
+	__set_bit(EV_REL, input->evbit);
 
-	/* Advertise only the keys we emit in media mode. */
+	/* Media mode keys */
 	input_set_capability(input, EV_KEY, KEY_VOLUMEUP);
 	input_set_capability(input, EV_KEY, KEY_VOLUMEDOWN);
 	input_set_capability(input, EV_KEY, KEY_PLAYPAUSE);
 	input_set_capability(input, EV_KEY, KEY_NEXTSONG);
 	input_set_capability(input, EV_KEY, KEY_PREVIOUSSONG);
 
+	/* WASD mode keys */
 	input_set_capability(input, EV_KEY, KEY_W);
 	input_set_capability(input, EV_KEY, KEY_A);
 	input_set_capability(input, EV_KEY, KEY_S);
 	input_set_capability(input, EV_KEY, KEY_D);
 
+	/* Mouse mode capabilities */
+	input_set_capability(input, EV_KEY, BTN_LEFT);
+	input_set_capability(input, EV_KEY, BTN_RIGHT);
+	input_set_capability(input, EV_KEY, BTN_MIDDLE);
+	input_set_capability(input, EV_REL, REL_X);
+	input_set_capability(input, EV_REL, REL_Y);
+	input_set_capability(input, EV_REL, REL_WHEEL);
+
 	input_set_drvdata(input, g29);
 	input->open = g29_input_open;
 	input->close = g29_input_close;

g29-wheel/g29_usb.h

@@ -0,0 +1,76 @@
+/*
+ * Logitech G29 USB/HID Protocol Definitions
+ */
+
+#ifndef G29_USB_H
+#define G29_USB_H
+
+#include <linux/types.h>
+
+#define USB_VENDOR_ID_LOGITECH      0x046d
+#define USB_DEVICE_ID_LOGITECH_G29  0xc24f
+#define USB_DEVICE_ID_LOGITECH_G29_ALT 0xc260
+
+#define G29_BTN_X           0x00000010u
+#define G29_BTN_SQUARE      0x00000020u
+#define G29_BTN_CIRCLE      0x00000040u
+#define G29_BTN_TRIANGLE    0x00000080u
+#define G29_BTN_R1          0x00000100u
+#define G29_BTN_L1          0x00000200u
+#define G29_BTN_R2          0x00000400u
+#define G29_BTN_L2          0x00000800u
+#define G29_BTN_SHARE       0x00001000u
+#define G29_BTN_OPTION      0x00002000u
+#define G29_BTN_R3          0x00004000u
+#define G29_BTN_L3          0x00008000u
+#define G29_BTN_GEAR_1      0x00010000u
+#define G29_BTN_GEAR_2      0x00020000u
+#define G29_BTN_GEAR_3      0x00040000u
+#define G29_BTN_GEAR_4      0x00080000u
+#define G29_BTN_GEAR_5      0x00100000u
+#define G29_BTN_GEAR_6      0x00200000u
+#define G29_BTN_GEAR_REV    0x00400000u
+#define G29_BTN_PLUS        0x00800000u
+#define G29_BTN_MINUS       0x01000000u
+#define G29_BTN_RED_CW      0x02000000u
+#define G29_BTN_RED_CCW     0x04000000u
+#define G29_BTN_RETURN      0x08000000u
+#define G29_BTN_PS3_LOGO     0xF0000000u
+
+#define G29_DPAD_MASK       0x0000000Eu
+#define G29_DPAD_UP         0x00000000u
+#define G29_DPAD_RIGHT      0x00000002u
+#define G29_DPAD_DOWN       0x00000004u
+#define G29_DPAD_LEFT       0x00000006u
+#define G29_DPAD_NONE       0x00000008u
+
+#define G29_WHEEL_MIN_ROTATION           0x0000
+#define G29_WHEEL_MAX_ROTATION           0xFFFF
+
+#define G29_PEDAL_RELEASED      0xFF
+#define G29_PEDAL_PRESSED       0x00
+#define G29_PEDAL_THRESHOLD     0x80
+
+#define G29_GEARSHIFT_X_LEFT    0x30   /* Gears 1-2 */
+#define G29_GEARSHIFT_X_CENTER  0x80   /* Gears 3-4 */
+#define G29_GEARSHIFT_X_RIGHT   0xB0   /* Gears 5-6-R */
+#define G29_GEARSHIFT_Y_TOP     0xD0   /* Gears 1-3-5 */
+#define G29_GEARSHIFT_Y_BOTTOM  0x40   /* Gears 2-4-6-R */
+#define G29_GEARSHIFT_Z_NEUTRAL 0x9C   /* Neutral position */
+#define G29_GEARSHIFT_Z_PRESSED 0xDC   /* Pressed down */
+
+#define WHEEL_CENTER        32768
+#define WHEEL_MAX_DIST      32768
+
+struct g29_state {
+	u32 buttons_le;  /* Button bitmask (little-endian) */
+	u16 rot_le;      /* Wheel rotation (little-endian) */
+	u8 gas;          /* Gas pedal (0xFF=up, 0x00=down) */
+	u8 brk;          /* Brake pedal (0xFF=up, 0x00=down) */
+	u8 clt;          /* Clutch pedal (0xFF=up, 0x00=down) */
+	u8 gr_x;         /* Gearshift X-axis */
+	u8 gr_y;         /* Gearshift Y-axis */
+	u8 gr_z;         /* Gearshift Z-axis */
+} __packed;
+
+#endif

logitech-G29.md

@@ -45,7 +45,7 @@ Logitech G29 USB Protocol
     - `0x02000000` - Red rotation clockwise
     - `0x04000000` - Red rotation counterclockwise
     - `0x08000000` - Return
-    - `0xF0000000` - ?
+    - `0xF0000000` - Playstation 3 Logo Button (verify)
 - `Rot`: Wheel rotation (little-endian). `0x0000` (leftmost) - `0xFFFF` (rightmost).
 - `Gas`: Gas pedal. `0xFF` (up, default) - `0x00` (down).
 - `Brk`: Brake pedal. `0xFF` (up, default) - `0x00` (down).