diff --git a/drivers/hid/hid-steam.c b/drivers/hid/hid-steam.c
index b110818fc945..b3c4e50e248a 100644
--- a/drivers/hid/hid-steam.c
+++ b/drivers/hid/hid-steam.c
@@ -71,60 +71,222 @@ static LIST_HEAD(steam_devices);
 
 /*
  * Commands that can be sent in a feature report.
- * Thanks to Valve for some valuable hints.
+ * Thanks to Valve and SDL for the names.
  */
-#define STEAM_CMD_SET_MAPPINGS		0x80
-#define STEAM_CMD_CLEAR_MAPPINGS	0x81
-#define STEAM_CMD_GET_MAPPINGS		0x82
-#define STEAM_CMD_GET_ATTRIB		0x83
-#define STEAM_CMD_GET_ATTRIB_LABEL	0x84
-#define STEAM_CMD_DEFAULT_MAPPINGS	0x85
-#define STEAM_CMD_FACTORY_RESET		0x86
-#define STEAM_CMD_WRITE_REGISTER	0x87
-#define STEAM_CMD_CLEAR_REGISTER	0x88
-#define STEAM_CMD_READ_REGISTER		0x89
-#define STEAM_CMD_GET_REGISTER_LABEL	0x8a
-#define STEAM_CMD_GET_REGISTER_MAX	0x8b
-#define STEAM_CMD_GET_REGISTER_DEFAULT	0x8c
-#define STEAM_CMD_SET_MODE		0x8d
-#define STEAM_CMD_DEFAULT_MOUSE		0x8e
-#define STEAM_CMD_FORCEFEEDBAK		0x8f
-#define STEAM_CMD_REQUEST_COMM_STATUS	0xb4
-#define STEAM_CMD_GET_SERIAL		0xae
-#define STEAM_CMD_HAPTIC_RUMBLE		0xeb
+enum {
+	ID_SET_DIGITAL_MAPPINGS		= 0x80,
+	ID_CLEAR_DIGITAL_MAPPINGS	= 0x81,
+	ID_GET_DIGITAL_MAPPINGS		= 0x82,
+	ID_GET_ATTRIBUTES_VALUES	= 0x83,
+	ID_GET_ATTRIBUTE_LABEL		= 0x84,
+	ID_SET_DEFAULT_DIGITAL_MAPPINGS	= 0x85,
+	ID_FACTORY_RESET		= 0x86,
+	ID_SET_SETTINGS_VALUES		= 0x87,
+	ID_CLEAR_SETTINGS_VALUES	= 0x88,
+	ID_GET_SETTINGS_VALUES		= 0x89,
+	ID_GET_SETTING_LABEL		= 0x8A,
+	ID_GET_SETTINGS_MAXS		= 0x8B,
+	ID_GET_SETTINGS_DEFAULTS	= 0x8C,
+	ID_SET_CONTROLLER_MODE		= 0x8D,
+	ID_LOAD_DEFAULT_SETTINGS	= 0x8E,
+	ID_TRIGGER_HAPTIC_PULSE		= 0x8F,
+	ID_TURN_OFF_CONTROLLER		= 0x9F,
 
-/* Some useful register ids */
-#define STEAM_REG_LPAD_MODE		0x07
-#define STEAM_REG_RPAD_MODE		0x08
-#define STEAM_REG_RPAD_MARGIN		0x18
-#define STEAM_REG_LED			0x2d
-#define STEAM_REG_GYRO_MODE		0x30
-#define STEAM_REG_LPAD_CLICK_PRESSURE	0x34
-#define STEAM_REG_RPAD_CLICK_PRESSURE	0x35
+	ID_GET_DEVICE_INFO		= 0xA1,
 
-/* Raw event identifiers */
-#define STEAM_EV_INPUT_DATA		0x01
-#define STEAM_EV_CONNECT		0x03
-#define STEAM_EV_BATTERY		0x04
-#define STEAM_EV_DECK_INPUT_DATA	0x09
+	ID_CALIBRATE_TRACKPADS		= 0xA7,
+	ID_RESERVED_0			= 0xA8,
+	ID_SET_SERIAL_NUMBER		= 0xA9,
+	ID_GET_TRACKPAD_CALIBRATION	= 0xAA,
+	ID_GET_TRACKPAD_FACTORY_CALIBRATION = 0xAB,
+	ID_GET_TRACKPAD_RAW_DATA	= 0xAC,
+	ID_ENABLE_PAIRING		= 0xAD,
+	ID_GET_STRING_ATTRIBUTE		= 0xAE,
+	ID_RADIO_ERASE_RECORDS		= 0xAF,
+	ID_RADIO_WRITE_RECORD		= 0xB0,
+	ID_SET_DONGLE_SETTING		= 0xB1,
+	ID_DONGLE_DISCONNECT_DEVICE	= 0xB2,
+	ID_DONGLE_COMMIT_DEVICE		= 0xB3,
+	ID_DONGLE_GET_WIRELESS_STATE	= 0xB4,
+	ID_CALIBRATE_GYRO		= 0xB5,
+	ID_PLAY_AUDIO			= 0xB6,
+	ID_AUDIO_UPDATE_START		= 0xB7,
+	ID_AUDIO_UPDATE_DATA		= 0xB8,
+	ID_AUDIO_UPDATE_COMPLETE	= 0xB9,
+	ID_GET_CHIPID			= 0xBA,
+
+	ID_CALIBRATE_JOYSTICK		= 0xBF,
+	ID_CALIBRATE_ANALOG_TRIGGERS	= 0xC0,
+	ID_SET_AUDIO_MAPPING		= 0xC1,
+	ID_CHECK_GYRO_FW_LOAD		= 0xC2,
+	ID_CALIBRATE_ANALOG		= 0xC3,
+	ID_DONGLE_GET_CONNECTED_SLOTS	= 0xC4,
+
+	ID_RESET_IMU			= 0xCE,
+
+	ID_TRIGGER_HAPTIC_CMD		= 0xEA,
+	ID_TRIGGER_RUMBLE_CMD		= 0xEB,
+};
+
+/* Settings IDs */
+enum {
+	/* 0 */
+	SETTING_MOUSE_SENSITIVITY,
+	SETTING_MOUSE_ACCELERATION,
+	SETTING_TRACKBALL_ROTATION_ANGLE,
+	SETTING_HAPTIC_INTENSITY_UNUSED,
+	SETTING_LEFT_GAMEPAD_STICK_ENABLED,
+	SETTING_RIGHT_GAMEPAD_STICK_ENABLED,
+	SETTING_USB_DEBUG_MODE,
+	SETTING_LEFT_TRACKPAD_MODE,
+	SETTING_RIGHT_TRACKPAD_MODE,
+	SETTING_MOUSE_POINTER_ENABLED,
+
+	/* 10 */
+	SETTING_DPAD_DEADZONE,
+	SETTING_MINIMUM_MOMENTUM_VEL,
+	SETTING_MOMENTUM_DECAY_AMMOUNT,
+	SETTING_TRACKPAD_RELATIVE_MODE_TICKS_PER_PIXEL,
+	SETTING_HAPTIC_INCREMENT,
+	SETTING_DPAD_ANGLE_SIN,
+	SETTING_DPAD_ANGLE_COS,
+	SETTING_MOMENTUM_VERTICAL_DIVISOR,
+	SETTING_MOMENTUM_MAXIMUM_VELOCITY,
+	SETTING_TRACKPAD_Z_ON,
+
+	/* 20 */
+	SETTING_TRACKPAD_Z_OFF,
+	SETTING_SENSITIVY_SCALE_AMMOUNT,
+	SETTING_LEFT_TRACKPAD_SECONDARY_MODE,
+	SETTING_RIGHT_TRACKPAD_SECONDARY_MODE,
+	SETTING_SMOOTH_ABSOLUTE_MOUSE,
+	SETTING_STEAMBUTTON_POWEROFF_TIME,
+	SETTING_UNUSED_1,
+	SETTING_TRACKPAD_OUTER_RADIUS,
+	SETTING_TRACKPAD_Z_ON_LEFT,
+	SETTING_TRACKPAD_Z_OFF_LEFT,
+
+	/* 30 */
+	SETTING_TRACKPAD_OUTER_SPIN_VEL,
+	SETTING_TRACKPAD_OUTER_SPIN_RADIUS,
+	SETTING_TRACKPAD_OUTER_SPIN_HORIZONTAL_ONLY,
+	SETTING_TRACKPAD_RELATIVE_MODE_DEADZONE,
+	SETTING_TRACKPAD_RELATIVE_MODE_MAX_VEL,
+	SETTING_TRACKPAD_RELATIVE_MODE_INVERT_Y,
+	SETTING_TRACKPAD_DOUBLE_TAP_BEEP_ENABLED,
+	SETTING_TRACKPAD_DOUBLE_TAP_BEEP_PERIOD,
+	SETTING_TRACKPAD_DOUBLE_TAP_BEEP_COUNT,
+	SETTING_TRACKPAD_OUTER_RADIUS_RELEASE_ON_TRANSITION,
+
+	/* 40 */
+	SETTING_RADIAL_MODE_ANGLE,
+	SETTING_HAPTIC_INTENSITY_MOUSE_MODE,
+	SETTING_LEFT_DPAD_REQUIRES_CLICK,
+	SETTING_RIGHT_DPAD_REQUIRES_CLICK,
+	SETTING_LED_BASELINE_BRIGHTNESS,
+	SETTING_LED_USER_BRIGHTNESS,
+	SETTING_ENABLE_RAW_JOYSTICK,
+	SETTING_ENABLE_FAST_SCAN,
+	SETTING_IMU_MODE,
+	SETTING_WIRELESS_PACKET_VERSION,
+
+	/* 50 */
+	SETTING_SLEEP_INACTIVITY_TIMEOUT,
+	SETTING_TRACKPAD_NOISE_THRESHOLD,
+	SETTING_LEFT_TRACKPAD_CLICK_PRESSURE,
+	SETTING_RIGHT_TRACKPAD_CLICK_PRESSURE,
+	SETTING_LEFT_BUMPER_CLICK_PRESSURE,
+	SETTING_RIGHT_BUMPER_CLICK_PRESSURE,
+	SETTING_LEFT_GRIP_CLICK_PRESSURE,
+	SETTING_RIGHT_GRIP_CLICK_PRESSURE,
+	SETTING_LEFT_GRIP2_CLICK_PRESSURE,
+	SETTING_RIGHT_GRIP2_CLICK_PRESSURE,
+
+	/* 60 */
+	SETTING_PRESSURE_MODE,
+	SETTING_CONTROLLER_TEST_MODE,
+	SETTING_TRIGGER_MODE,
+	SETTING_TRACKPAD_Z_THRESHOLD,
+	SETTING_FRAME_RATE,
+	SETTING_TRACKPAD_FILT_CTRL,
+	SETTING_TRACKPAD_CLIP,
+	SETTING_DEBUG_OUTPUT_SELECT,
+	SETTING_TRIGGER_THRESHOLD_PERCENT,
+	SETTING_TRACKPAD_FREQUENCY_HOPPING,
+
+	/* 70 */
+	SETTING_HAPTICS_ENABLED,
+	SETTING_STEAM_WATCHDOG_ENABLE,
+	SETTING_TIMP_TOUCH_THRESHOLD_ON,
+	SETTING_TIMP_TOUCH_THRESHOLD_OFF,
+	SETTING_FREQ_HOPPING,
+	SETTING_TEST_CONTROL,
+	SETTING_HAPTIC_MASTER_GAIN_DB,
+	SETTING_THUMB_TOUCH_THRESH,
+	SETTING_DEVICE_POWER_STATUS,
+	SETTING_HAPTIC_INTENSITY,
+
+	/* 80 */
+	SETTING_STABILIZER_ENABLED,
+	SETTING_TIMP_MODE_MTE,
+};
+
+/* Input report identifiers */
+enum
+{
+	ID_CONTROLLER_STATE = 1,
+	ID_CONTROLLER_DEBUG = 2,
+	ID_CONTROLLER_WIRELESS = 3,
+	ID_CONTROLLER_STATUS = 4,
+	ID_CONTROLLER_DEBUG2 = 5,
+	ID_CONTROLLER_SECONDARY_STATE = 6,
+	ID_CONTROLLER_BLE_STATE = 7,
+	ID_CONTROLLER_DECK_STATE = 9
+};
+
+/* String attribute idenitifiers */
+enum {
+	ATTRIB_STR_BOARD_SERIAL,
+	ATTRIB_STR_UNIT_SERIAL,
+};
 
 /* Values for GYRO_MODE (bitmask) */
-#define STEAM_GYRO_MODE_OFF		0x0000
-#define STEAM_GYRO_MODE_STEERING	0x0001
-#define STEAM_GYRO_MODE_TILT		0x0002
-#define STEAM_GYRO_MODE_SEND_ORIENTATION	0x0004
-#define STEAM_GYRO_MODE_SEND_RAW_ACCEL		0x0008
-#define STEAM_GYRO_MODE_SEND_RAW_GYRO		0x0010
+enum {
+	SETTING_GYRO_MODE_OFF			= 0,
+	SETTING_GYRO_MODE_STEERING		= BIT(0),
+	SETTING_GYRO_MODE_TILT			= BIT(1),
+	SETTING_GYRO_MODE_SEND_ORIENTATION	= BIT(2),
+	SETTING_GYRO_MODE_SEND_RAW_ACCEL	= BIT(3),
+	SETTING_GYRO_MODE_SEND_RAW_GYRO		= BIT(4),
+};
+
+/* Trackpad modes */
+enum {
+	TRACKPAD_ABSOLUTE_MOUSE,
+	TRACKPAD_RELATIVE_MOUSE,
+	TRACKPAD_DPAD_FOUR_WAY_DISCRETE,
+	TRACKPAD_DPAD_FOUR_WAY_OVERLAP,
+	TRACKPAD_DPAD_EIGHT_WAY,
+	TRACKPAD_RADIAL_MODE,
+	TRACKPAD_ABSOLUTE_DPAD,
+	TRACKPAD_NONE,
+	TRACKPAD_GESTURE_KEYBOARD,
+};
+
+/* Pad identifiers for the deck */
+#define STEAM_PAD_LEFT 0
+#define STEAM_PAD_RIGHT 1
+#define STEAM_PAD_BOTH 2
 
 /* Other random constants */
-#define STEAM_SERIAL_LEN 10
+#define STEAM_SERIAL_LEN 0x15
 
 struct steam_device {
 	struct list_head list;
 	spinlock_t lock;
 	struct hid_device *hdev, *client_hdev;
-	struct mutex mutex;
-	bool client_opened;
+	struct mutex report_mutex;
+	unsigned long client_opened;
 	struct input_dev __rcu *input;
 	unsigned long quirks;
 	struct work_struct work_connect;
@@ -134,7 +296,9 @@ struct steam_device {
 	struct power_supply __rcu *battery;
 	u8 battery_charge;
 	u16 voltage;
-	struct delayed_work heartbeat;
+	struct delayed_work mode_switch;
+	bool did_mode_switch;
+	bool gamepad_mode;
 	struct work_struct rumble_work;
 	u16 rumble_left;
 	u16 rumble_right;
@@ -226,13 +390,13 @@ static inline int steam_send_report_byte(struct steam_device *steam, u8 cmd)
 	return steam_send_report(steam, &cmd, 1);
 }
 
-static int steam_write_registers(struct steam_device *steam,
+static int steam_write_settings(struct steam_device *steam,
 		/* u8 reg, u16 val */...)
 {
 	/* Send: 0x87 len (reg valLo valHi)* */
 	u8 reg;
 	u16 val;
-	u8 cmd[64] = {STEAM_CMD_WRITE_REGISTER, 0x00};
+	u8 cmd[64] = {ID_SET_SETTINGS_VALUES, 0x00};
 	int ret;
 	va_list args;
 
@@ -265,23 +429,29 @@ static int steam_get_serial(struct steam_device *steam)
 {
 	/*
 	 * Send: 0xae 0x15 0x01
-	 * Recv: 0xae 0x15 0x01 serialnumber (10 chars)
+	 * Recv: 0xae 0x15 0x01 serialnumber
 	 */
-	int ret;
-	u8 cmd[] = {STEAM_CMD_GET_SERIAL, 0x15, 0x01};
+	int ret = 0;
+	u8 cmd[] = {ID_GET_STRING_ATTRIBUTE, sizeof(steam->serial_no), ATTRIB_STR_UNIT_SERIAL};
 	u8 reply[3 + STEAM_SERIAL_LEN + 1];
 
+	mutex_lock(&steam->report_mutex);
 	ret = steam_send_report(steam, cmd, sizeof(cmd));
 	if (ret < 0)
-		return ret;
+		goto out;
 	ret = steam_recv_report(steam, reply, sizeof(reply));
 	if (ret < 0)
-		return ret;
-	if (reply[0] != 0xae || reply[1] != 0x15 || reply[2] != 0x01)
-		return -EIO;
+		goto out;
+	if (reply[0] != ID_GET_STRING_ATTRIBUTE || reply[1] < 1 ||
+	    reply[1] > sizeof(steam->serial_no) || reply[2] != ATTRIB_STR_UNIT_SERIAL) {
+		ret = -EIO;
+		goto out;
+	}
 	reply[3 + STEAM_SERIAL_LEN] = 0;
-	strscpy(steam->serial_no, reply + 3, sizeof(steam->serial_no));
-	return 0;
+	strscpy(steam->serial_no, reply + 3, reply[1]);
+out:
+	mutex_unlock(&steam->report_mutex);
+	return ret;
 }
 
 /*
@@ -291,14 +461,50 @@ static int steam_get_serial(struct steam_device *steam)
  */
 static inline int steam_request_conn_status(struct steam_device *steam)
 {
-	return steam_send_report_byte(steam, STEAM_CMD_REQUEST_COMM_STATUS);
+	int ret;
+	mutex_lock(&steam->report_mutex);
+	ret = steam_send_report_byte(steam, ID_DONGLE_GET_WIRELESS_STATE);
+	mutex_unlock(&steam->report_mutex);
+	return ret;
+}
+
+/*
+ * Send a haptic pulse to the trackpads
+ * Duration and interval are measured in microseconds, count is the number
+ * of pulses to send for duration time with interval microseconds between them
+ * and gain is measured in decibels, ranging from -24 to +6
+ */
+static inline int steam_haptic_pulse(struct steam_device *steam, u8 pad,
+				u16 duration, u16 interval, u16 count, u8 gain)
+{
+	int ret;
+	u8 report[10] = {ID_TRIGGER_HAPTIC_PULSE, 8};
+
+	/* Left and right are swapped on this report for legacy reasons */
+	if (pad < STEAM_PAD_BOTH)
+		pad ^= 1;
+
+	report[2] = pad;
+	report[3] = duration & 0xFF;
+	report[4] = duration >> 8;
+	report[5] = interval & 0xFF;
+	report[6] = interval >> 8;
+	report[7] = count & 0xFF;
+	report[8] = count >> 8;
+	report[9] = gain;
+
+	mutex_lock(&steam->report_mutex);
+	ret = steam_send_report(steam, report, sizeof(report));
+	mutex_unlock(&steam->report_mutex);
+	return ret;
 }
 
 static inline int steam_haptic_rumble(struct steam_device *steam,
 				u16 intensity, u16 left_speed, u16 right_speed,
 				u8 left_gain, u8 right_gain)
 {
-	u8 report[11] = {STEAM_CMD_HAPTIC_RUMBLE, 9};
+	int ret;
+	u8 report[11] = {ID_TRIGGER_RUMBLE_CMD, 9};
 
 	report[3] = intensity & 0xFF;
 	report[4] = intensity >> 8;
@@ -309,7 +515,10 @@ static inline int steam_haptic_rumble(struct steam_device *steam,
 	report[9] = left_gain;
 	report[10] = right_gain;
 
-	return steam_send_report(steam, report, sizeof(report));
+	mutex_lock(&steam->report_mutex);
+	ret = steam_send_report(steam, report, sizeof(report));
+	mutex_unlock(&steam->report_mutex);
+	return ret;
 }
 
 static void steam_haptic_rumble_cb(struct work_struct *work)
@@ -335,40 +544,36 @@ static int steam_play_effect(struct input_dev *dev, void *data,
 
 static void steam_set_lizard_mode(struct steam_device *steam, bool enable)
 {
-	if (enable) {
-		/* enable esc, enter, cursors */
-		steam_send_report_byte(steam, STEAM_CMD_DEFAULT_MAPPINGS);
-		/* enable mouse */
-		steam_send_report_byte(steam, STEAM_CMD_DEFAULT_MOUSE);
-		steam_write_registers(steam,
-			STEAM_REG_RPAD_MARGIN, 0x01, /* enable margin */
-			0);
+	if (steam->gamepad_mode)
+		enable = false;
 
-		cancel_delayed_work_sync(&steam->heartbeat);
+	if (enable) {
+		mutex_lock(&steam->report_mutex);
+		/* enable esc, enter, cursors */
+		steam_send_report_byte(steam, ID_SET_DEFAULT_DIGITAL_MAPPINGS);
+		/* reset settings */
+		steam_send_report_byte(steam, ID_LOAD_DEFAULT_SETTINGS);
+		mutex_unlock(&steam->report_mutex);
 	} else {
+		mutex_lock(&steam->report_mutex);
 		/* disable esc, enter, cursor */
-		steam_send_report_byte(steam, STEAM_CMD_CLEAR_MAPPINGS);
+		steam_send_report_byte(steam, ID_CLEAR_DIGITAL_MAPPINGS);
 
 		if (steam->quirks & STEAM_QUIRK_DECK) {
-			steam_write_registers(steam,
-				STEAM_REG_RPAD_MARGIN, 0x00, /* disable margin */
-				STEAM_REG_LPAD_MODE, 0x07, /* disable mouse */
-				STEAM_REG_RPAD_MODE, 0x07, /* disable mouse */
-				STEAM_REG_LPAD_CLICK_PRESSURE, 0xFFFF, /* disable clicky pad */
-				STEAM_REG_RPAD_CLICK_PRESSURE, 0xFFFF, /* disable clicky pad */
+			steam_write_settings(steam,
+				SETTING_LEFT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
+				SETTING_RIGHT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
+				SETTING_LEFT_TRACKPAD_CLICK_PRESSURE, 0xFFFF, /* disable haptic click */
+				SETTING_RIGHT_TRACKPAD_CLICK_PRESSURE, 0xFFFF, /* disable haptic click */
+				SETTING_STEAM_WATCHDOG_ENABLE, 0, /* disable watchdog that tests if Steam is active */
 				0);
-			/*
-			 * The Steam Deck has a watchdog that automatically enables
-			 * lizard mode if it doesn't see any traffic for too long
-			 */
-			if (!work_busy(&steam->heartbeat.work))
-				schedule_delayed_work(&steam->heartbeat, 5 * HZ);
+			mutex_unlock(&steam->report_mutex);
 		} else {
-			steam_write_registers(steam,
-				STEAM_REG_RPAD_MARGIN, 0x00, /* disable margin */
-				STEAM_REG_LPAD_MODE, 0x07, /* disable mouse */
-				STEAM_REG_RPAD_MODE, 0x07, /* disable mouse */
+			steam_write_settings(steam,
+				SETTING_LEFT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
+				SETTING_RIGHT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
 				0);
+			mutex_unlock(&steam->report_mutex);
 		}
 	}
 }
@@ -376,22 +581,38 @@ static void steam_set_lizard_mode(struct steam_device *steam, bool enable)
 static int steam_input_open(struct input_dev *dev)
 {
 	struct steam_device *steam = input_get_drvdata(dev);
+	unsigned long flags;
+	bool set_lizard_mode;
+
+	/*
+	 * Disabling lizard mode automatically is only done on the Steam
+	 * Controller. On the Steam Deck, this is toggled manually by holding
+	 * the options button instead, handled by steam_mode_switch_cb.
+	 */
+	if (!(steam->quirks & STEAM_QUIRK_DECK)) {
+		spin_lock_irqsave(&steam->lock, flags);
+		set_lizard_mode = !steam->client_opened && lizard_mode;
+		spin_unlock_irqrestore(&steam->lock, flags);
+		if (set_lizard_mode)
+			steam_set_lizard_mode(steam, false);
+	}
 
-	mutex_lock(&steam->mutex);
-	if (!steam->client_opened && lizard_mode)
-		steam_set_lizard_mode(steam, false);
-	mutex_unlock(&steam->mutex);
 	return 0;
 }
 
 static void steam_input_close(struct input_dev *dev)
 {
 	struct steam_device *steam = input_get_drvdata(dev);
+	unsigned long flags;
+	bool set_lizard_mode;
 
-	mutex_lock(&steam->mutex);
-	if (!steam->client_opened && lizard_mode)
-		steam_set_lizard_mode(steam, true);
-	mutex_unlock(&steam->mutex);
+	if (!(steam->quirks & STEAM_QUIRK_DECK)) {
+		spin_lock_irqsave(&steam->lock, flags);
+		set_lizard_mode = !steam->client_opened && lizard_mode;
+		spin_unlock_irqrestore(&steam->lock, flags);
+		if (set_lizard_mode)
+			steam_set_lizard_mode(steam, true);
+	}
 }
 
 static enum power_supply_property steam_battery_props[] = {
@@ -635,7 +856,8 @@ static void steam_battery_unregister(struct steam_device *steam)
 static int steam_register(struct steam_device *steam)
 {
 	int ret;
-	bool client_opened;
+	unsigned long client_opened;
+	unsigned long flags;
 
 	/*
 	 * This function can be called several times in a row with the
@@ -648,11 +870,9 @@ static int steam_register(struct steam_device *steam)
 		 * Unlikely, but getting the serial could fail, and it is not so
 		 * important, so make up a serial number and go on.
 		 */
-		mutex_lock(&steam->mutex);
 		if (steam_get_serial(steam) < 0)
 			strscpy(steam->serial_no, "XXXXXXXXXX",
 					sizeof(steam->serial_no));
-		mutex_unlock(&steam->mutex);
 
 		hid_info(steam->hdev, "Steam Controller '%s' connected",
 				steam->serial_no);
@@ -667,15 +887,13 @@ static int steam_register(struct steam_device *steam)
 		mutex_unlock(&steam_devices_lock);
 	}
 
-	mutex_lock(&steam->mutex);
+	spin_lock_irqsave(&steam->lock, flags);
 	client_opened = steam->client_opened;
-	if (!client_opened)
+	spin_unlock_irqrestore(&steam->lock, flags);
+	if (!client_opened) {
 		steam_set_lizard_mode(steam, lizard_mode);
-	mutex_unlock(&steam->mutex);
-
-	if (!client_opened)
 		ret = steam_input_register(steam);
-	else
+	} else
 		ret = 0;
 
 	return ret;
@@ -719,6 +937,34 @@ static void steam_work_connect_cb(struct work_struct *work)
 	}
 }
 
+static void steam_mode_switch_cb(struct work_struct *work)
+{
+	struct steam_device *steam = container_of(to_delayed_work(work),
+							struct steam_device, mode_switch);
+	unsigned long flags;
+	bool client_opened;
+	steam->gamepad_mode = !steam->gamepad_mode;
+	if (!lizard_mode)
+		return;
+
+	if (steam->gamepad_mode)
+		steam_set_lizard_mode(steam, false);
+	else {
+		spin_lock_irqsave(&steam->lock, flags);
+		client_opened = steam->client_opened;
+		spin_unlock_irqrestore(&steam->lock, flags);
+		if (!client_opened)
+			steam_set_lizard_mode(steam, lizard_mode);
+	}
+
+	steam_haptic_pulse(steam, STEAM_PAD_RIGHT, 0x190, 0, 1, 0);
+	if (steam->gamepad_mode) {
+		steam_haptic_pulse(steam, STEAM_PAD_LEFT, 0x14D, 0x14D, 0x2D, 0);
+	} else {
+		steam_haptic_pulse(steam, STEAM_PAD_LEFT, 0x1F4, 0x1F4, 0x1E, 0);
+	}
+}
+
 static bool steam_is_valve_interface(struct hid_device *hdev)
 {
 	struct hid_report_enum *rep_enum;
@@ -738,22 +984,6 @@ static bool steam_is_valve_interface(struct hid_device *hdev)
 	return !list_empty(&rep_enum->report_list);
 }
 
-static void steam_lizard_mode_heartbeat(struct work_struct *work)
-{
-	struct steam_device *steam = container_of(work, struct steam_device,
-							heartbeat.work);
-
-	mutex_lock(&steam->mutex);
-	if (!steam->client_opened && steam->client_hdev) {
-		steam_send_report_byte(steam, STEAM_CMD_CLEAR_MAPPINGS);
-		steam_write_registers(steam,
-			STEAM_REG_RPAD_MODE, 0x07, /* disable mouse */
-			0);
-		schedule_delayed_work(&steam->heartbeat, 5 * HZ);
-	}
-	mutex_unlock(&steam->mutex);
-}
-
 static int steam_client_ll_parse(struct hid_device *hdev)
 {
 	struct steam_device *steam = hdev->driver_data;
@@ -774,10 +1004,11 @@ static void steam_client_ll_stop(struct hid_device *hdev)
 static int steam_client_ll_open(struct hid_device *hdev)
 {
 	struct steam_device *steam = hdev->driver_data;
+	unsigned long flags;
 
-	mutex_lock(&steam->mutex);
-	steam->client_opened = true;
-	mutex_unlock(&steam->mutex);
+	spin_lock_irqsave(&steam->lock, flags);
+	steam->client_opened++;
+	spin_unlock_irqrestore(&steam->lock, flags);
 
 	steam_input_unregister(steam);
 
@@ -792,17 +1023,14 @@ static void steam_client_ll_close(struct hid_device *hdev)
 	bool connected;
 
 	spin_lock_irqsave(&steam->lock, flags);
-	connected = steam->connected;
+	steam->client_opened--;
+	connected = steam->connected && !steam->client_opened;
 	spin_unlock_irqrestore(&steam->lock, flags);
 
-	mutex_lock(&steam->mutex);
-	steam->client_opened = false;
-	if (connected)
+	if (connected) {
 		steam_set_lizard_mode(steam, lizard_mode);
-	mutex_unlock(&steam->mutex);
-
-	if (connected)
 		steam_input_register(steam);
+	}
 }
 
 static int steam_client_ll_raw_request(struct hid_device *hdev,
@@ -888,20 +1116,13 @@ static int steam_probe(struct hid_device *hdev,
 	steam->hdev = hdev;
 	hid_set_drvdata(hdev, steam);
 	spin_lock_init(&steam->lock);
-	mutex_init(&steam->mutex);
+	mutex_init(&steam->report_mutex);
 	steam->quirks = id->driver_data;
 	INIT_WORK(&steam->work_connect, steam_work_connect_cb);
+	INIT_DELAYED_WORK(&steam->mode_switch, steam_mode_switch_cb);
 	INIT_LIST_HEAD(&steam->list);
-	INIT_DEFERRABLE_WORK(&steam->heartbeat, steam_lizard_mode_heartbeat);
 	INIT_WORK(&steam->rumble_work, steam_haptic_rumble_cb);
 
-	steam->client_hdev = steam_create_client_hid(hdev);
-	if (IS_ERR(steam->client_hdev)) {
-		ret = PTR_ERR(steam->client_hdev);
-		goto client_hdev_fail;
-	}
-	steam->client_hdev->driver_data = steam;
-
 	/*
 	 * With the real steam controller interface, do not connect hidraw.
 	 * Instead, create the client_hid and connect that.
@@ -910,10 +1131,6 @@ static int steam_probe(struct hid_device *hdev,
 	if (ret)
 		goto hid_hw_start_fail;
 
-	ret = hid_add_device(steam->client_hdev);
-	if (ret)
-		goto client_hdev_add_fail;
-
 	ret = hid_hw_open(hdev);
 	if (ret) {
 		hid_err(hdev,
@@ -939,17 +1156,28 @@ static int steam_probe(struct hid_device *hdev,
 		}
 	}
 
+	steam->client_hdev = steam_create_client_hid(hdev);
+	if (IS_ERR(steam->client_hdev)) {
+		ret = PTR_ERR(steam->client_hdev);
+		goto client_hdev_fail;
+	}
+	steam->client_hdev->driver_data = steam;
+
+	ret = hid_add_device(steam->client_hdev);
+	if (ret)
+		goto client_hdev_add_fail;
+
 	return 0;
 
-input_register_fail:
-hid_hw_open_fail:
 client_hdev_add_fail:
 	hid_hw_stop(hdev);
-hid_hw_start_fail:
-	hid_destroy_device(steam->client_hdev);
 client_hdev_fail:
+	hid_destroy_device(steam->client_hdev);
+input_register_fail:
+hid_hw_open_fail:
+hid_hw_start_fail:
 	cancel_work_sync(&steam->work_connect);
-	cancel_delayed_work_sync(&steam->heartbeat);
+	cancel_delayed_work_sync(&steam->mode_switch);
 	cancel_work_sync(&steam->rumble_work);
 steam_alloc_fail:
 	hid_err(hdev, "%s: failed with error %d\n",
@@ -966,13 +1194,11 @@ static void steam_remove(struct hid_device *hdev)
 		return;
 	}
 
-	hid_destroy_device(steam->client_hdev);
-	mutex_lock(&steam->mutex);
-	steam->client_hdev = NULL;
-	steam->client_opened = false;
-	cancel_delayed_work_sync(&steam->heartbeat);
-	mutex_unlock(&steam->mutex);
+	cancel_delayed_work_sync(&steam->mode_switch);
 	cancel_work_sync(&steam->work_connect);
+	hid_destroy_device(steam->client_hdev);
+	steam->client_hdev = NULL;
+	steam->client_opened = 0;
 	if (steam->quirks & STEAM_QUIRK_WIRELESS) {
 		hid_info(hdev, "Steam wireless receiver disconnected");
 	}
@@ -1254,6 +1480,17 @@ static void steam_do_deck_input_event(struct steam_device *steam,
 	b13 = data[13];
 	b14 = data[14];
 
+	if (!(b9 & BIT(6)) && steam->did_mode_switch) {
+		steam->did_mode_switch = false;
+		cancel_delayed_work_sync(&steam->mode_switch);
+	} else if (!steam->client_opened && (b9 & BIT(6)) && !steam->did_mode_switch) {
+		steam->did_mode_switch = true;
+		schedule_delayed_work(&steam->mode_switch, 45 * HZ / 100);
+	}
+
+	if (!steam->gamepad_mode)
+		return;
+
 	lpad_touched = b10 & BIT(3);
 	rpad_touched = b10 & BIT(4);
 
@@ -1375,7 +1612,7 @@ static int steam_raw_event(struct hid_device *hdev,
 		return 0;
 
 	switch (data[2]) {
-	case STEAM_EV_INPUT_DATA:
+	case ID_CONTROLLER_STATE:
 		if (steam->client_opened)
 			return 0;
 		rcu_read_lock();
@@ -1384,7 +1621,7 @@ static int steam_raw_event(struct hid_device *hdev,
 			steam_do_input_event(steam, input, data);
 		rcu_read_unlock();
 		break;
-	case STEAM_EV_DECK_INPUT_DATA:
+	case ID_CONTROLLER_DECK_STATE:
 		if (steam->client_opened)
 			return 0;
 		rcu_read_lock();
@@ -1393,7 +1630,7 @@ static int steam_raw_event(struct hid_device *hdev,
 			steam_do_deck_input_event(steam, input, data);
 		rcu_read_unlock();
 		break;
-	case STEAM_EV_CONNECT:
+	case ID_CONTROLLER_WIRELESS:
 		/*
 		 * The payload of this event is a single byte:
 		 *  0x01: disconnected.
@@ -1408,7 +1645,7 @@ static int steam_raw_event(struct hid_device *hdev,
 			break;
 		}
 		break;
-	case STEAM_EV_BATTERY:
+	case ID_CONTROLLER_STATUS:
 		if (steam->quirks & STEAM_QUIRK_WIRELESS) {
 			rcu_read_lock();
 			battery = rcu_dereference(steam->battery);
@@ -1439,10 +1676,8 @@ static int steam_param_set_lizard_mode(const char *val,
 
 	mutex_lock(&steam_devices_lock);
 	list_for_each_entry(steam, &steam_devices, list) {
-		mutex_lock(&steam->mutex);
 		if (!steam->client_opened)
 			steam_set_lizard_mode(steam, lizard_mode);
-		mutex_unlock(&steam->mutex);
 	}
 	mutex_unlock(&steam_devices_lock);
 	return 0;