ftrace: Synchronize the initialization of ftrace_opsgrafted

There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
author: Steven Rostedt <rostedt@goodmis.org> 2026-09-02 09:55:01 -0400
committer: Steven Rostedt <rostedt@goodmis.org> 2026-09-02 11:08:21 -0400
commit: 4617721c502b2ddaa4e324e86da4997edf738fa5 (patch)
tree: 350aa83b47da0b574a814795392b20b0bed83cbc /drivers/hid/hid-steam.c
download: linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.tar.gz
linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.zip
1 files changed, 2784 insertions, 0 deletions
diff --git a/drivers/hid/hid-steam.c b/drivers/hid/hid-steam.c
new file mode 100644
index 000000000..ac08cb2d0
--- /dev/null
+++ b/drivers/hid/hid-steam.c
@@ -0,0 +1,2784 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * HID driver for Valve Steam Controller
+ *
+ * Copyright (c) 2018 Rodrigo Rivas Costa <rodrigorivascosta@gmail.com>
+ * Copyright (c) 2022 Valve Software
+ *
+ * Supports both the wired and wireless interfaces.
+ *
+ * This controller has a builtin emulation of mouse and keyboard: the right pad
+ * can be used as a mouse, the shoulder buttons are mouse buttons, A and B
+ * buttons are ENTER and ESCAPE, and so on. This is implemented as additional
+ * HID interfaces.
+ *
+ * This is known as the "lizard mode", because apparently lizards like to use
+ * the computer from the coach, without a proper mouse and keyboard.
+ *
+ * This driver will disable the lizard mode when the input device is opened
+ * and re-enable it when the input device is closed, so as not to break user
+ * mode behaviour. The lizard_mode parameter can be used to change that.
+ *
+ * There are a few user space applications (notably Steam Client) that use
+ * the hidraw interface directly to create input devices (XTest, uinput...).
+ * In order to avoid breaking them this driver creates a layered hidraw device,
+ * so it can detect when the client is running and then:
+ *  - it will not send any command to the controller.
+ *  - this input device will be removed, to avoid double input of the same
+ *    user action.
+ * When the client is closed, this input device will be created again.
+ *
+ * For additional functions, such as changing the right-pad margin or switching
+ * the led, you can use the user-space tool at:
+ *
+ *   https://github.com/rodrigorc/steamctrl
+ */
+
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <linux/mutex.h>
+#include <linux/rcupdate.h>
+#include <linux/delay.h>
+#include <linux/power_supply.h>
+#include <linux/unaligned.h>
+#include <linux/usb.h>
+#include "hid-ids.h"
+
+MODULE_DESCRIPTION("HID driver for Valve Steam Controller");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Rodrigo Rivas Costa <rodrigorivascosta@gmail.com>");
+MODULE_AUTHOR("Vicki Pfau <vi@endrift.com>");
+
+static bool lizard_mode = true;
+
+static DEFINE_MUTEX(steam_devices_lock);
+static LIST_HEAD(steam_devices);
+
+#define STEAM_QUIRK_WIRELESS		BIT(0)
+#define STEAM_QUIRK_DECK		BIT(1)
+#define STEAM_QUIRK_IBEX		BIT(2)
+#define STEAM_QUIRK_BLE			BIT(3)
+
+/* Touch pads are 40 mm in diameter and 65535 units */
+#define STEAM_PAD_RESOLUTION 1638
+/* Trigger runs are about 5 mm and 256 units */
+#define STEAM_TRIGGER_RESOLUTION 51
+/* Joystick runs are about 5 mm and 256 units */
+#define STEAM_JOYSTICK_RESOLUTION 51
+/* Trigger runs are about 6 mm and 32768 units */
+#define STEAM_DECK_TRIGGER_RESOLUTION 5461
+/* Joystick runs are about 5 mm and 32768 units */
+#define STEAM_DECK_JOYSTICK_RESOLUTION 6553
+/* Accelerometer has 16 bit resolution and a range of +/- 2g */
+#define STEAM_ACCEL_RES_PER_G 16384
+#define STEAM_ACCEL_RANGE 32768
+#define STEAM_ACCEL_FUZZ 128
+#define STEAM_DECK_ACCEL_FUZZ 32
+/* Gyroscope has 16 bit resolution and a range of +/- 2000 dps */
+#define STEAM_GYRO_RES_PER_DPS 16
+#define STEAM_GYRO_RANGE 32768
+#define STEAM_GYRO_FUZZ 0
+
+#define STEAM_PAD_FUZZ 256
+
+/*
+ * Commands that can be sent in a feature report.
+ * Thanks to Valve and SDL for the names.
+ */
+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,
+
+	ID_GET_DEVICE_INFO		= 0xA1,
+
+	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_LIZARD_MODE,
+
+	/* 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,
+};
+
+/* Read-only attributes */
+enum {
+	ATTRIB_UNIQUE_ID, // deprecated
+	ATTRIB_PRODUCT_ID,
+	ATTRIB_PRODUCT_REVISON, // deprecated
+	ATTRIB_CAPABILITIES = ATTRIB_PRODUCT_REVISON, // intentional aliasing
+	ATTRIB_FIRMWARE_VERSION, // deprecated
+	ATTRIB_FIRMWARE_BUILD_TIME,
+	ATTRIB_RADIO_FIRMWARE_BUILD_TIME,
+	ATTRIB_RADIO_DEVICE_ID0,
+	ATTRIB_RADIO_DEVICE_ID1,
+	ATTRIB_DONGLE_FIRMWARE_BUILD_TIME,
+	ATTRIB_HW_ID, // AKA BOARD_REVISION,
+	ATTRIB_BOOTLOADER_BUILD_TIME,
+	ATTRIB_CONNECTION_INTERVAL_IN_US,
+	ATTRIB_SECONDARY_FIRMWARE_BUILD_TIME,
+	ATTRIB_SECONDARY_BOOTLOADER_BUILD_TIME,
+	ATTRIB_SECONDARY_HW_ID, // AKA BOARD_REVISION,
+	ATTRIB_STREAMING,
+	ATTRIB_TRACKPAD_ID,
+	ATTRIB_SECONDARY_TRACKPAD_ID,
+
+	ATTRIB_COUNT
+};
+
+/* String attribute identifiers */
+enum {
+	ATTRIB_STR_BOARD_SERIAL,
+	ATTRIB_STR_UNIT_SERIAL,
+};
+
+/* Values for IMU_MODE (bitmask) */
+enum {
+	SETTING_IMU_MODE_OFF			= 0,
+	SETTING_IMU_MODE_STEERING		= BIT(0),
+	SETTING_IMU_MODE_TILT			= BIT(1),
+	SETTING_IMU_MODE_SEND_ORIENTATION	= BIT(2),
+	SETTING_IMU_MODE_SEND_RAW_ACCEL		= BIT(3),
+	SETTING_IMU_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,
+};
+
+/* Report identifiers (Ibex only) */
+enum {
+	/* Feature */
+	REPORT_ID_FEATURES_CONTROLLER	= 1,
+	REPORT_ID_FEATURES_DONGLE	= 2,
+
+	/* Input */
+	REPORT_ID_INPUT			= 0x42,
+	REPORT_ID_BATTERY		= 0x43,
+	REPORT_ID_INPUT2		= 0x45,
+	REPORT_ID_WIRELESS_EVENT	= 0x79,
+
+	/* Output */
+	REPORT_ID_HAPTIC_RUMBLE		= 0x80,
+	REPORT_ID_HAPTIC_PULSE		= 0x81,
+	REPORT_ID_HAPTIC_COMMAND	= 0x82,
+	REPORT_ID_HAPTIC_LFO_TONE	= 0x83,
+	REPORT_ID_HAPTIC_LOG_SWEEP	= 0x84,
+	REPORT_ID_HAPTIC_SCRIPT		= 0x85,
+};
+
+/* Ibex charge state */
+enum {
+	CHARGE_STATE_DISCHARGING	= 1,
+	CHARGE_STATE_CHARGING		= 2,
+	CHARGE_STATE_CHARGING_DONE	= 4,
+};
+
+/* Ibex wireless events */
+enum {
+	WIRELESS_EVENT_DISCONNECT	= 1,
+	WIRELESS_EVENT_CONNECT		= 2,
+	WIRELESS_EVENT_PAIR		= 3,
+};
+
+struct steam_controller_attribute {
+	unsigned char tag;
+	__le32 value;
+} __packed;
+
+struct steam_ibex_battery_status {
+	u8 charge_state;
+	u8 battery_level;
+	__le16 battery_voltage;
+	__le16 system_voltage;
+	__le16 input_voltage;
+	__le16 battery_current;
+	__le16 input_current;
+	__le16 temperature;
+};
+
+struct steam_ibex_haptic_rumble {
+	u8 type;
+	__le16 intensity;
+	struct {
+		__le16 speed;
+		u8 gain;
+	} __packed left, right;
+} __packed;
+static_assert(sizeof(struct steam_ibex_haptic_rumble) == 9);
+
+struct steam_ibex_haptic_pulse {
+	u8 side;
+	__le16 on_us;
+	__le16 off_us;
+	__le16 repeat_count;
+} __packed;
+static_assert(sizeof(struct steam_ibex_haptic_pulse) == 7);
+
+struct steam_ibex_output_report {
+	u8 id;
+	union {
+		struct steam_ibex_haptic_rumble rumble;
+		struct steam_ibex_haptic_pulse pulse;
+	};
+} __packed;
+
+/* 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 0x15
+
+struct steam_device {
+	struct list_head list;
+	spinlock_t lock;
+	struct hid_device *hdev, *client_hdev;
+	struct mutex report_mutex;
+	struct mutex registration_mutex;
+	unsigned long client_opened;
+	struct input_dev __rcu *input;
+	struct input_dev __rcu *sensors;
+	unsigned long quirks;
+	struct work_struct work_connect;
+	bool connected;
+	bool registered;
+	char serial_no[STEAM_SERIAL_LEN + 1];
+	struct power_supply_desc battery_desc;
+	struct power_supply __rcu *battery;
+	u8 battery_charge;
+	u8 battery_status;
+	u16 battery_temp;
+	u16 battery_voltage;
+	u16 battery_current;
+	struct delayed_work mode_switch;
+	bool did_mode_switch;
+	bool gamepad_mode;
+	struct work_struct rumble_work;
+	struct delayed_work coalesce_rumble_work;
+	u16 rumble_left;
+	u16 rumble_right;
+	unsigned int sensor_timestamp_us;
+	unsigned int sensor_update_rate_us;
+};
+
+static int steam_recv_report_id(struct steam_device *steam,
+		u8 *data, int size, u8 report_id)
+{
+	struct hid_report *r;
+	u8 *buf;
+	unsigned int retries = 50;
+	int ret;
+	u32 len;
+
+	/*
+	 * All reports start with a two byte header.
+	 * We must read at least two bytes to get a sensible output.
+	 */
+	if (size < 2)
+		return -EINVAL;
+
+	r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[report_id];
+	if (!r) {
+		hid_err(steam->hdev, "No HID_FEATURE_REPORT present for ID %u\n", report_id);
+		return -EINVAL;
+	}
+
+	len = hid_report_len(r);
+	if (len < 64)
+		return -EINVAL;
+
+	buf = hid_alloc_report_buf(r, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	/*
+	 * The report ID is consistent, so strip the first byte from the output.
+	 * hid_report_len() is not counting the report ID, so +1 to the length
+	 * or else we get a EOVERFLOW. We are safe from a buffer overflow
+	 * because hid_alloc_report_buf() allocates +7 bytes.
+	 */
+	if (!(steam->quirks & STEAM_QUIRK_IBEX))
+		len += 1;
+
+	/*
+	 * Sometimes the wireless controller fails with EPIPE
+	 * when sending a feature report.
+	 * Doing a HID_REQ_GET_REPORT and waiting for a while
+	 * seems to fix that.
+	 */
+	do {
+		ret = hid_hw_raw_request(steam->hdev, report_id,
+				buf, len,
+				HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
+		if (ret != -EPIPE)
+			break;
+		msleep(20);
+	} while (--retries);
+	if (ret > 0) {
+		/* Remove the report ID from the return buffer */
+		ret--;
+		size = min(size, ret);
+		memcpy(data, buf + 1, size);
+	}
+
+	kfree(buf);
+	/*
+	 * Don't log if the failure is -ENODEV, as this
+	 * can happen normally on disconnect.
+	 */
+	if (ret < 0 && ret != -ENODEV)
+		hid_err(steam->hdev, "%s: error %d\n", __func__, ret);
+	else if (ret > 0)
+		hid_dbg(steam->hdev, "Received report %*ph\n", size, data);
+	if (ret < 0)
+		return ret;
+
+	if (ret < 2) {
+		hid_err(steam->hdev, "%s: reply too short\n", __func__);
+		return -EPROTO;
+	}
+	if (ret < data[1] + 2) {
+		hid_err(steam->hdev, "%s: expected %u bytes, read %i\n",
+				__func__, data[1] + 2, ret);
+		return -EPROTO;
+	}
+	return size;
+}
+
+static int steam_send_report_id(struct steam_device *steam,
+		u8 *cmd, int size, u8 report_id)
+{
+	struct hid_report *r;
+	u8 *buf;
+	unsigned int retries = 50;
+	int ret;
+	u32 len;
+
+	r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[report_id];
+	if (!r) {
+		hid_err(steam->hdev, "No HID_FEATURE_REPORT present for ID %u\n", report_id);
+		return -EINVAL;
+	}
+
+	len = hid_report_len(r);
+	if (len < 64)
+		return -EINVAL;
+
+	buf = hid_alloc_report_buf(r, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	/* The report ID is always consistent */
+	buf[0] = report_id;
+	memcpy(buf + 1, cmd, size);
+
+	hid_dbg(steam->hdev, "Sending report %*ph\n", size, cmd);
+
+	if (!(steam->quirks & STEAM_QUIRK_IBEX))
+		len += 1;
+
+	/*
+	 * Sometimes the wireless controller fails with EPIPE
+	 * when sending a feature report.
+	 * Doing a HID_REQ_SET_REPORT and waiting for a while
+	 * seems to fix that.
+	 */
+	do {
+		ret = hid_hw_raw_request(steam->hdev, report_id,
+				buf, max(size + 1, len),
+				HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+		if (ret != -EPIPE)
+			break;
+		msleep(20);
+	} while (--retries);
+
+	kfree(buf);
+	/*
+	 * Don't log if the failure is -ENODEV, as this
+	 * can happen normally on disconnect.
+	 */
+	if (ret < 0 && ret != -ENODEV)
+		hid_err(steam->hdev, "%s: error %d (%*ph)\n", __func__,
+				ret, size, cmd);
+	return ret;
+}
+
+static int steam_send_report(struct steam_device *steam,
+		u8 *cmd, int size)
+{
+	u8 report_id;
+
+	if (steam->quirks & STEAM_QUIRK_IBEX)
+		report_id = REPORT_ID_FEATURES_CONTROLLER;
+	else
+		report_id = 0;
+
+	return steam_send_report_id(steam, cmd, size, report_id);
+}
+
+static inline int steam_send_report_byte(struct steam_device *steam, u8 cmd)
+{
+	return steam_send_report(steam, &cmd, 1);
+}
+
+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] = {ID_SET_SETTINGS_VALUES, 0x00};
+	va_list args;
+
+	va_start(args, steam);
+	for (;;) {
+		reg = va_arg(args, int);
+		if (reg == 0)
+			break;
+		val = va_arg(args, int);
+		cmd[cmd[1] + 2] = reg;
+		cmd[cmd[1] + 3] = val & 0xff;
+		cmd[cmd[1] + 4] = val >> 8;
+		cmd[1] += 3;
+	}
+	va_end(args);
+
+	return steam_send_report(steam, cmd, 2 + cmd[1]);
+}
+
+static int steam_exchange_report_id(struct steam_device *steam, u8 *cmd, int csize,
+		u8 *reply, int rsize, u8 report_id)
+{
+	unsigned int retries = 5;
+	int ret;
+
+	do {
+		ret = steam_send_report_id(steam, cmd, csize, report_id);
+		if (ret < 0)
+			return ret;
+		ret = steam_recv_report_id(steam, reply, rsize, report_id);
+		/*
+		 * Sometimes this can fail on the first few tries on the Steam
+		 * Controller (2015). It appears to be a firmware bug, and Steam
+		 * itself just retries, so we should also retry a few times to
+		 * see if we get it.
+		 */
+		if (ret == -EPROTO)
+			continue;
+		if (ret < 0) {
+			hid_err(steam->hdev, "%s: error reading reply (%*ph)\n",
+					__func__, csize, cmd);
+			return ret;
+		}
+		if (reply[0] == cmd[0] && reply[1] >= 1)
+			break;
+		if (retries > 0)
+			continue;
+		hid_err(steam->hdev, "%s: invalid reply (%*ph)\n", __func__,
+				rsize, reply);
+		return -EPROTO;
+	} while (retries--);
+
+	return ret;
+}
+
+static int steam_exchange_report(struct steam_device *steam, u8 *cmd, int csize,
+		u8 *reply, int rsize)
+{
+	u8 report_id;
+
+	if (steam->quirks & STEAM_QUIRK_IBEX)
+		report_id = REPORT_ID_FEATURES_CONTROLLER;
+	else
+		report_id = 0;
+
+	return steam_exchange_report_id(steam, cmd, csize, reply, rsize, report_id);
+}
+
+static int steam_get_serial(struct steam_device *steam)
+{
+	/*
+	 * Send: 0xae 0x15 0x01
+	 * Recv: 0xae 0x15 0x01 serialnumber
+	 */
+	int ret = 0;
+	u8 cmd[] = {ID_GET_STRING_ATTRIBUTE, sizeof(steam->serial_no), ATTRIB_STR_UNIT_SERIAL};
+	u8 reply[3 + STEAM_SERIAL_LEN + 1] = {0};
+
+	ret = steam_exchange_report(steam, cmd, sizeof(cmd), reply, sizeof(reply));
+	if (ret < 0)
+		return ret;
+	if (reply[1] > sizeof(steam->serial_no) || reply[2] != ATTRIB_STR_UNIT_SERIAL) {
+		hid_err(steam->hdev, "%s: invalid reply (%*ph)\n", __func__,
+				(int)sizeof(reply), reply);
+		return -EIO;
+	}
+	strscpy(steam->serial_no, reply + 3, reply[1]);
+	return ret;
+}
+
+static int steam_get_attributes(struct steam_device *steam)
+{
+	int ret = 0;
+	u8 cmd[] = {ID_GET_ATTRIBUTES_VALUES, 0};
+	u8 reply[64] = {};
+	u8 size;
+	int i;
+	struct steam_controller_attribute *attr;
+
+	ret = steam_exchange_report(steam, cmd, sizeof(cmd), reply, sizeof(reply));
+	if (ret < 0)
+		return ret;
+	if (reply[1] < 2) {
+		hid_err(steam->hdev, "%s: invalid reply (%*ph)\n", __func__,
+				(int)sizeof(reply), reply);
+		return -EIO;
+	}
+
+	size = min(reply[1], sizeof(reply) - 2);
+	for (i = 0; i + sizeof(*attr) <= size; i += sizeof(*attr)) {
+		attr = (struct steam_controller_attribute *)&reply[i + 2];
+		if (attr->tag == ATTRIB_CONNECTION_INTERVAL_IN_US) {
+			steam->sensor_update_rate_us = get_unaligned_le32(&attr->value);
+			hid_dbg(steam->hdev, "Sensor update rate: %uus\n",
+				steam->sensor_update_rate_us);
+		}
+	}
+
+	return 0;
+}
+
+static int steam_get_conn_status(struct steam_device *steam)
+{
+	int ret = 0;
+	u8 cmd[] = {ID_DONGLE_GET_WIRELESS_STATE};
+	u8 reply[3] = {};
+	u8 report_id;
+
+	if (steam->quirks & STEAM_QUIRK_IBEX)
+		report_id = REPORT_ID_FEATURES_DONGLE;
+	else
+		report_id = 0;
+
+	guard(mutex)(&steam->report_mutex);
+	ret = steam_exchange_report_id(steam, cmd, sizeof(cmd), reply, sizeof(reply), report_id);
+	if (ret < 0)
+		return ret;
+	if (reply[0] != ID_DONGLE_GET_WIRELESS_STATE || reply[1] < 1) {
+		hid_err(steam->hdev, "%s: invalid reply (%*ph)\n", __func__,
+				(int)sizeof(reply), reply);
+		return -EIO;
+	}
+
+	return reply[2];
+}
+
+/*
+ * 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;
+
+	/* Left and right are swapped on this report for legacy reasons */
+	if (pad < STEAM_PAD_BOTH)
+		pad ^= 1;
+
+	if (steam->quirks & STEAM_QUIRK_IBEX) {
+		struct steam_ibex_output_report *report =
+			kzalloc(sizeof(struct steam_ibex_output_report), GFP_KERNEL);
+
+		if (!report)
+			return -ENOMEM;
+
+		report->id = REPORT_ID_HAPTIC_PULSE;
+		report->pulse.side = pad;
+		put_unaligned_le16(duration, &report->pulse.on_us);
+		put_unaligned_le16(interval, &report->pulse.off_us);
+		put_unaligned_le16(count, &report->pulse.repeat_count);
+
+		ret = hid_hw_output_report(steam->hdev, (u8 *)report, 8);
+
+		kfree(report);
+	} else {
+		u8 report[10] = {ID_TRIGGER_HAPTIC_PULSE, 8, 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;
+
+		ret = steam_send_report(steam, report, 10);
+	}
+
+	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)
+{
+	int ret;
+
+	if (steam->quirks & STEAM_QUIRK_IBEX) {
+		struct steam_ibex_output_report *report =
+			kzalloc(sizeof(struct steam_ibex_output_report), GFP_KERNEL);
+
+		if (!report)
+			return -ENOMEM;
+
+		report->id = REPORT_ID_HAPTIC_RUMBLE;
+		put_unaligned_le16(intensity, &report->rumble.intensity);
+		put_unaligned_le16(left_speed, &report->rumble.left.speed);
+		report->rumble.left.gain = left_gain;
+		put_unaligned_le16(right_speed, &report->rumble.right.speed);
+		report->rumble.right.gain = right_gain;
+
+		ret = hid_hw_output_report(steam->hdev, (u8 *)report, 10);
+
+		kfree(report);
+	} else {
+		u8 report[11] = {ID_TRIGGER_RUMBLE_CMD, 9};
+
+		report[3] = intensity & 0xFF;
+		report[4] = intensity >> 8;
+		report[5] = left_speed & 0xFF;
+		report[6] = left_speed >> 8;
+		report[7] = right_speed & 0xFF;
+		report[8] = right_speed >> 8;
+		report[9] = left_gain;
+		report[10] = right_gain;
+
+		ret = steam_send_report(steam, report, sizeof(report));
+	}
+	return ret;
+}
+
+static void steam_haptic_rumble_cb(struct work_struct *work)
+{
+	struct steam_device *steam = container_of(work, struct steam_device,
+							rumble_work);
+
+	mutex_lock(&steam->report_mutex);
+	steam_haptic_rumble(steam, 0, steam->rumble_left,
+		steam->rumble_right, 2, 0);
+	mutex_unlock(&steam->report_mutex);
+}
+
+static void steam_coalesce_rumble_cb(struct work_struct *work)
+{
+	struct steam_device *steam = container_of(to_delayed_work(work),
+							struct steam_device,
+							coalesce_rumble_work);
+
+	mutex_lock(&steam->report_mutex);
+	steam_haptic_rumble(steam, 0, steam->rumble_left,
+		steam->rumble_right, 2, 0);
+	mutex_unlock(&steam->report_mutex);
+
+	if (steam->rumble_left || steam->rumble_right)
+		schedule_delayed_work(&steam->coalesce_rumble_work, HZ / 20);
+}
+
+#ifdef CONFIG_STEAM_FF
+static int steam_play_effect(struct input_dev *dev, void *data,
+				struct ff_effect *effect)
+{
+	struct steam_device *steam = input_get_drvdata(dev);
+
+	steam->rumble_left = effect->u.rumble.strong_magnitude;
+	steam->rumble_right = effect->u.rumble.weak_magnitude;
+
+	/*
+	 * The interface gets somewhat overloaded when too many rumble
+	 * packets are sent in a row, so Steam throttles it to 20 Hz
+	 */
+	if (delayed_work_pending(&steam->coalesce_rumble_work))
+		return 0;
+
+	schedule_delayed_work(&steam->coalesce_rumble_work, HZ / 20);
+	return schedule_work(&steam->rumble_work);
+}
+#endif
+
+static void steam_set_lizard_mode(struct steam_device *steam, bool enable)
+{
+	if (steam->gamepad_mode)
+		enable = false;
+
+	if (enable) {
+		/* 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);
+	} else {
+		/* disable esc, enter, cursor */
+		steam_send_report_byte(steam, ID_CLEAR_DIGITAL_MAPPINGS);
+
+		if (steam->quirks & (STEAM_QUIRK_DECK | STEAM_QUIRK_IBEX))
+			steam_write_settings(steam,
+				/* disable lizard mode */
+				SETTING_LIZARD_MODE, 0,
+				/* disable watchdog that tests if Steam is active */
+				SETTING_STEAM_WATCHDOG_ENABLE, 0,
+				0);
+		else
+			steam_write_settings(steam,
+				SETTING_LEFT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
+				SETTING_RIGHT_TRACKPAD_MODE, TRACKPAD_NONE, /* disable mouse */
+				0);
+	}
+}
+
+static int steam_input_open(struct input_dev *dev)
+{
+	struct steam_device *steam = input_get_drvdata(dev);
+	unsigned long flags;
+	bool client_opened;
+
+	/*
+	 * 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 | STEAM_QUIRK_IBEX))) {
+		spin_lock_irqsave(&steam->lock, flags);
+		client_opened = steam->client_opened;
+		spin_unlock_irqrestore(&steam->lock, flags);
+		guard(mutex)(&steam->report_mutex);
+		if (!client_opened && lizard_mode)
+			steam_set_lizard_mode(steam, false);
+	}
+
+	return 0;
+}
+
+static void steam_input_close(struct input_dev *dev)
+{
+	struct steam_device *steam = input_get_drvdata(dev);
+	unsigned long flags;
+	bool client_opened;
+
+	if (!(steam->quirks & (STEAM_QUIRK_DECK | STEAM_QUIRK_IBEX))) {
+		spin_lock_irqsave(&steam->lock, flags);
+		client_opened = steam->client_opened;
+		spin_unlock_irqrestore(&steam->lock, flags);
+		guard(mutex)(&steam->report_mutex);
+		if (!client_opened && lizard_mode)
+			steam_set_lizard_mode(steam, true);
+	}
+}
+
+static int steam_sensor_open(struct input_dev *dev)
+{
+	struct steam_device *steam = input_get_drvdata(dev);
+
+	scoped_guard(spinlock_irqsave, &steam->lock) {
+		if (steam->client_opened)
+			return 0;
+	}
+
+	guard(mutex)(&steam->report_mutex);
+	steam_write_settings(steam, SETTING_IMU_MODE,
+			SETTING_IMU_MODE_SEND_RAW_ACCEL | SETTING_IMU_MODE_SEND_RAW_GYRO,
+			0);
+
+	return 0;
+}
+
+static void steam_sensor_close(struct input_dev *dev)
+{
+	struct steam_device *steam = input_get_drvdata(dev);
+
+	scoped_guard(spinlock_irqsave, &steam->lock) {
+		if (steam->client_opened)
+			return;
+	}
+
+	guard(mutex)(&steam->report_mutex);
+	steam_write_settings(steam, SETTING_IMU_MODE, 0, 0);
+}
+
+static enum power_supply_property steam_battery_props[] = {
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_SCOPE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CAPACITY,
+};
+
+static int steam_battery_get_property(struct power_supply *psy,
+				enum power_supply_property psp,
+				union power_supply_propval *val)
+{
+	struct steam_device *steam = power_supply_get_drvdata(psy);
+	unsigned long flags;
+	u16 volts;
+	u16 curr;
+	u16 temp;
+	u8 batt;
+	u8 status;
+	int ret = 0;
+
+	spin_lock_irqsave(&steam->lock, flags);
+	volts = steam->battery_voltage;
+	curr = steam->battery_current;
+	batt = steam->battery_charge;
+	temp = steam->battery_temp;
+	status = steam->battery_status;
+	spin_unlock_irqrestore(&steam->lock, flags);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = 1;
+		break;
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = status;
+		break;
+	case POWER_SUPPLY_PROP_SCOPE:
+		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = volts * 1000; /* mV -> uV */
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		val->intval = curr * 1000; /* mA -> uA */
+		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		val->intval = temp / 100; /* thousandths °C -> tenths °C */
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		val->intval = batt;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static enum power_supply_property steam_ibex_battery_props[] = {
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_SCOPE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_TEMP,
+};
+
+static int steam_battery_register(struct steam_device *steam)
+{
+	struct power_supply *battery;
+	struct power_supply_config battery_cfg = { .drv_data = steam, };
+	unsigned long flags;
+	int ret;
+
+	steam->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
+	if (steam->quirks & STEAM_QUIRK_IBEX) {
+		steam->battery_desc.properties = steam_ibex_battery_props;
+		steam->battery_desc.num_properties = ARRAY_SIZE(steam_ibex_battery_props);
+		/*
+		 * Ibex needs a shorter name as it has a temperature and the
+		 * thermal zone name length limit is 20 characters. It's more
+		 * ambiguous sounding, so let's only use it when needed.
+		 */
+		steam->battery_desc.name = devm_kasprintf(&steam->hdev->dev,
+				GFP_KERNEL, "steam-%s",
+				steam->serial_no);
+	} else {
+		steam->battery_desc.properties = steam_battery_props;
+		steam->battery_desc.num_properties = ARRAY_SIZE(steam_battery_props);
+		steam->battery_desc.name = devm_kasprintf(&steam->hdev->dev,
+				GFP_KERNEL, "steam-controller-%s-battery",
+				steam->serial_no);
+	}
+	steam->battery_desc.get_property = steam_battery_get_property;
+	if (!steam->battery_desc.name)
+		return -ENOMEM;
+
+	/* avoid the warning of 0% battery while waiting for the first info */
+	spin_lock_irqsave(&steam->lock, flags);
+	steam->battery_voltage = 3000;
+	steam->battery_charge = 100;
+	steam->battery_current = 0;
+	steam->battery_temp = 20000;
+	steam->battery_status = POWER_SUPPLY_STATUS_UNKNOWN;
+	spin_unlock_irqrestore(&steam->lock, flags);
+
+	battery = power_supply_register(&steam->hdev->dev,
+			&steam->battery_desc, &battery_cfg);
+	if (IS_ERR(battery)) {
+		ret = PTR_ERR(battery);
+		devm_kfree(&steam->hdev->dev, steam->battery_desc.name);
+		hid_err(steam->hdev,
+				"%s:power_supply_register failed with error %d\n",
+				__func__, ret);
+		return ret;
+	}
+	rcu_assign_pointer(steam->battery, battery);
+	power_supply_powers(battery, &steam->hdev->dev);
+	return 0;
+}
+
+static int steam_input_register(struct steam_device *steam)
+{
+	struct hid_device *hdev = steam->hdev;
+	struct input_dev *input;
+	int ret;
+
+	rcu_read_lock();
+	input = rcu_dereference(steam->input);
+	rcu_read_unlock();
+	if (input) {
+		dbg_hid("%s: already connected\n", __func__);
+		return 0;
+	}
+
+	input = input_allocate_device();
+	if (!input)
+		return -ENOMEM;
+
+	input_set_drvdata(input, steam);
+	input->dev.parent = &hdev->dev;
+	input->open = steam_input_open;
+	input->close = steam_input_close;
+
+	input->name = (steam->quirks & STEAM_QUIRK_WIRELESS) ? "Wireless Steam Controller" :
+		(steam->quirks & STEAM_QUIRK_DECK) ? "Steam Deck" :
+		"Steam Controller";
+	input->phys = hdev->phys;
+	input->uniq = steam->serial_no;
+	input->id.bustype = hdev->bus;
+	input->id.vendor = hdev->vendor;
+	input->id.product = hdev->product;
+	input->id.version = hdev->version;
+
+	input_set_capability(input, EV_KEY, BTN_TR2);
+	input_set_capability(input, EV_KEY, BTN_TL2);
+	input_set_capability(input, EV_KEY, BTN_TR);
+	input_set_capability(input, EV_KEY, BTN_TL);
+	input_set_capability(input, EV_KEY, BTN_Y);
+	input_set_capability(input, EV_KEY, BTN_B);
+	input_set_capability(input, EV_KEY, BTN_X);
+	input_set_capability(input, EV_KEY, BTN_A);
+	input_set_capability(input, EV_KEY, BTN_DPAD_UP);
+	input_set_capability(input, EV_KEY, BTN_DPAD_RIGHT);
+	input_set_capability(input, EV_KEY, BTN_DPAD_LEFT);
+	input_set_capability(input, EV_KEY, BTN_DPAD_DOWN);
+	input_set_capability(input, EV_KEY, BTN_SELECT);
+	input_set_capability(input, EV_KEY, BTN_MODE);
+	input_set_capability(input, EV_KEY, BTN_START);
+	input_set_capability(input, EV_KEY, BTN_THUMBR);
+	input_set_capability(input, EV_KEY, BTN_THUMBL);
+	input_set_capability(input, EV_KEY, BTN_THUMB);
+	input_set_capability(input, EV_KEY, BTN_THUMB2);
+	input_set_capability(input, EV_KEY, BTN_GRIPL);
+	input_set_capability(input, EV_KEY, BTN_GRIPR);
+	if (steam->quirks & (STEAM_QUIRK_DECK | STEAM_QUIRK_IBEX)) {
+		input_set_capability(input, EV_KEY, BTN_BASE);
+		input_set_capability(input, EV_KEY, BTN_GRIPL2);
+		input_set_capability(input, EV_KEY, BTN_GRIPR2);
+	}
+
+	input_set_abs_params(input, ABS_X, -32767, 32767, 0, 0);
+	input_set_abs_params(input, ABS_Y, -32767, 32767, 0, 0);
+
+	input_set_abs_params(input, ABS_HAT0X, -32767, 32767,
+			STEAM_PAD_FUZZ, 0);
+	input_set_abs_params(input, ABS_HAT0Y, -32767, 32767,
+			STEAM_PAD_FUZZ, 0);
+
+	if (steam->quirks & (STEAM_QUIRK_DECK | STEAM_QUIRK_IBEX)) {
+		input_set_abs_params(input, ABS_HAT2Y, 0, 32767, 0, 0);
+		input_set_abs_params(input, ABS_HAT2X, 0, 32767, 0, 0);
+
+		input_set_abs_params(input, ABS_RX, -32767, 32767, 0, 0);
+		input_set_abs_params(input, ABS_RY, -32767, 32767, 0, 0);
+
+		input_set_abs_params(input, ABS_HAT1X, -32767, 32767,
+				STEAM_PAD_FUZZ, 0);
+		input_set_abs_params(input, ABS_HAT1Y, -32767, 32767,
+				STEAM_PAD_FUZZ, 0);
+
+		input_abs_set_res(input, ABS_X, STEAM_DECK_JOYSTICK_RESOLUTION);
+		input_abs_set_res(input, ABS_Y, STEAM_DECK_JOYSTICK_RESOLUTION);
+		input_abs_set_res(input, ABS_RX, STEAM_DECK_JOYSTICK_RESOLUTION);
+		input_abs_set_res(input, ABS_RY, STEAM_DECK_JOYSTICK_RESOLUTION);
+		input_abs_set_res(input, ABS_HAT1X, STEAM_PAD_RESOLUTION);
+		input_abs_set_res(input, ABS_HAT1Y, STEAM_PAD_RESOLUTION);
+		input_abs_set_res(input, ABS_HAT2Y, STEAM_DECK_TRIGGER_RESOLUTION);
+		input_abs_set_res(input, ABS_HAT2X, STEAM_DECK_TRIGGER_RESOLUTION);
+	} else {
+		input_set_abs_params(input, ABS_HAT2Y, 0, 255, 0, 0);
+		input_set_abs_params(input, ABS_HAT2X, 0, 255, 0, 0);
+
+		input_set_abs_params(input, ABS_RX, -32767, 32767,
+				STEAM_PAD_FUZZ, 0);
+		input_set_abs_params(input, ABS_RY, -32767, 32767,
+				STEAM_PAD_FUZZ, 0);
+
+		input_abs_set_res(input, ABS_X, STEAM_JOYSTICK_RESOLUTION);
+		input_abs_set_res(input, ABS_Y, STEAM_JOYSTICK_RESOLUTION);
+		input_abs_set_res(input, ABS_RX, STEAM_PAD_RESOLUTION);
+		input_abs_set_res(input, ABS_RY, STEAM_PAD_RESOLUTION);
+		input_abs_set_res(input, ABS_HAT2Y, STEAM_TRIGGER_RESOLUTION);
+		input_abs_set_res(input, ABS_HAT2X, STEAM_TRIGGER_RESOLUTION);
+	}
+	input_abs_set_res(input, ABS_HAT0X, STEAM_PAD_RESOLUTION);
+	input_abs_set_res(input, ABS_HAT0Y, STEAM_PAD_RESOLUTION);
+
+#ifdef CONFIG_STEAM_FF
+	if (steam->quirks & (STEAM_QUIRK_DECK | STEAM_QUIRK_IBEX)) {
+		input_set_capability(input, EV_FF, FF_RUMBLE);
+		ret = input_ff_create_memless(input, NULL, steam_play_effect);
+		if (ret)
+			goto input_register_fail;
+	}
+#endif
+
+	ret = input_register_device(input);
+	if (ret)
+		goto input_register_fail;
+
+	rcu_assign_pointer(steam->input, input);
+	return 0;
+
+input_register_fail:
+	input_free_device(input);
+	return ret;
+}
+
+static int steam_sensors_register(struct steam_device *steam)
+{
+	struct hid_device *hdev = steam->hdev;
+	struct input_dev *sensors;
+	int ret;
+	bool needs_open_close;
+
+	rcu_read_lock();
+	sensors = rcu_dereference(steam->sensors);
+	rcu_read_unlock();
+	if (sensors) {
+		dbg_hid("%s: already connected\n", __func__);
+		return 0;
+	}
+
+	sensors = input_allocate_device();
+	if (!sensors)
+		return -ENOMEM;
+
+	input_set_drvdata(sensors, steam);
+	sensors->dev.parent = &hdev->dev;
+
+	/*
+	 * The open/close calls are needed in these specific cases:
+	 *
+	 * - Steam Controller (2015): Always
+	 * - Steam Deck: Never
+	 * - Steam Controller (2026): Only when wireless/BLE
+	 */
+	if (steam->quirks & STEAM_QUIRK_DECK)
+		needs_open_close = false;
+	else if (steam->quirks & (STEAM_QUIRK_WIRELESS | STEAM_QUIRK_BLE))
+		/* Both wireless Steam Controller setups */
+		needs_open_close = true;
+	else if (steam->quirks & STEAM_QUIRK_IBEX)
+		/* Wired Steam Controller (2026) */
+		needs_open_close = false;
+	else
+		/* Wired Steam Controller (2015) */
+		needs_open_close = true;
+
+	if (needs_open_close) {
+		sensors->open = steam_sensor_open;
+		sensors->close = steam_sensor_close;
+	}
+
+	sensors->name = steam->quirks & STEAM_QUIRK_DECK ?
+		"Steam Deck Motion Sensors" :
+		"Steam Controller Motion Sensors";
+	sensors->phys = hdev->phys;
+	sensors->uniq = steam->serial_no;
+	sensors->id.bustype = hdev->bus;
+	sensors->id.vendor = hdev->vendor;
+	sensors->id.product = hdev->product;
+	sensors->id.version = hdev->version;
+
+	__set_bit(INPUT_PROP_ACCELEROMETER, sensors->propbit);
+	__set_bit(EV_MSC, sensors->evbit);
+	__set_bit(MSC_TIMESTAMP, sensors->mscbit);
+
+	if (steam->quirks & STEAM_QUIRK_DECK) {
+		input_set_abs_params(sensors, ABS_X, -STEAM_ACCEL_RANGE,
+				STEAM_ACCEL_RANGE, STEAM_DECK_ACCEL_FUZZ, 0);
+		input_set_abs_params(sensors, ABS_Y, -STEAM_ACCEL_RANGE,
+				STEAM_ACCEL_RANGE, STEAM_DECK_ACCEL_FUZZ, 0);
+		input_set_abs_params(sensors, ABS_Z, -STEAM_ACCEL_RANGE,
+				STEAM_ACCEL_RANGE, STEAM_DECK_ACCEL_FUZZ, 0);
+	} else {
+		input_set_abs_params(sensors, ABS_X, -STEAM_ACCEL_RANGE,
+				STEAM_ACCEL_RANGE, STEAM_ACCEL_FUZZ, 0);
+		input_set_abs_params(sensors, ABS_Y, -STEAM_ACCEL_RANGE,
+				STEAM_ACCEL_RANGE, STEAM_ACCEL_FUZZ, 0);
+		input_set_abs_params(sensors, ABS_Z, -STEAM_ACCEL_RANGE,
+				STEAM_ACCEL_RANGE, STEAM_ACCEL_FUZZ, 0);
+	}
+	input_abs_set_res(sensors, ABS_X, STEAM_ACCEL_RES_PER_G);
+	input_abs_set_res(sensors, ABS_Y, STEAM_ACCEL_RES_PER_G);
+	input_abs_set_res(sensors, ABS_Z, STEAM_ACCEL_RES_PER_G);
+
+	input_set_abs_params(sensors, ABS_RX, -STEAM_GYRO_RANGE,
+			STEAM_GYRO_RANGE, STEAM_GYRO_FUZZ, 0);
+	input_set_abs_params(sensors, ABS_RY, -STEAM_GYRO_RANGE,
+			STEAM_GYRO_RANGE, STEAM_GYRO_FUZZ, 0);
+	input_set_abs_params(sensors, ABS_RZ, -STEAM_GYRO_RANGE,
+			STEAM_GYRO_RANGE, STEAM_GYRO_FUZZ, 0);
+	input_abs_set_res(sensors, ABS_RX, STEAM_GYRO_RES_PER_DPS);
+	input_abs_set_res(sensors, ABS_RY, STEAM_GYRO_RES_PER_DPS);
+	input_abs_set_res(sensors, ABS_RZ, STEAM_GYRO_RES_PER_DPS);
+
+	ret = input_register_device(sensors);
+	if (ret)
+		goto sensors_register_fail;
+
+	rcu_assign_pointer(steam->sensors, sensors);
+	return 0;
+
+sensors_register_fail:
+	input_free_device(sensors);
+	return ret;
+}
+
+static void steam_input_unregister(struct steam_device *steam)
+{
+	struct input_dev *input;
+	rcu_read_lock();
+	input = rcu_dereference(steam->input);
+	rcu_read_unlock();
+	if (!input)
+		return;
+	RCU_INIT_POINTER(steam->input, NULL);
+	synchronize_rcu();
+	input_unregister_device(input);
+}
+
+static void steam_sensors_unregister(struct steam_device *steam)
+{
+	struct input_dev *sensors;
+
+	rcu_read_lock();
+	sensors = rcu_dereference(steam->sensors);
+	rcu_read_unlock();
+
+	if (!sensors)
+		return;
+	RCU_INIT_POINTER(steam->sensors, NULL);
+	synchronize_rcu();
+	input_unregister_device(sensors);
+}
+
+static void steam_battery_unregister(struct steam_device *steam)
+{
+	struct power_supply *battery;
+
+	rcu_read_lock();
+	battery = rcu_dereference(steam->battery);
+	rcu_read_unlock();
+
+	if (!battery)
+		return;
+	RCU_INIT_POINTER(steam->battery, NULL);
+	synchronize_rcu();
+	power_supply_unregister(battery);
+	devm_kfree(&steam->hdev->dev, steam->battery_desc.name);
+}
+
+static int steam_register(struct steam_device *steam)
+{
+	int ret;
+
+	mutex_lock(&steam->registration_mutex);
+	/*
+	 * This function can be called several times in a row with the
+	 * wireless adaptor, without steam_unregister() between them, because
+	 * another client send a get_connection_status command, for example.
+	 */
+	if (steam->registered) {
+		mutex_unlock(&steam->registration_mutex);
+		return 0;
+	}
+
+	mutex_lock(&steam->report_mutex);
+	/*
+	 * Unlikely, but getting the serial could fail, and it is not so
+	 * important, so make up a serial number and go on.
+	 */
+	if (steam_get_serial(steam) < 0 || !steam->serial_no[0])
+		strscpy(steam->serial_no, "XXXXXXXXXX",
+				sizeof(steam->serial_no));
+
+	ret = steam_get_attributes(steam);
+	if (ret < 0)
+		hid_err(steam->hdev,
+			"%s:steam_get_attributes failed with error %d\n",
+			__func__, ret);
+
+	hid_info(steam->hdev, "Steam %s '%s' connected",
+			steam->quirks & STEAM_QUIRK_DECK ? "Deck" : "Controller",
+			steam->serial_no);
+
+	steam_set_lizard_mode(steam, lizard_mode);
+	mutex_unlock(&steam->report_mutex);
+
+	/* ignore battery errors, we can live without it */
+	if (steam->quirks & (STEAM_QUIRK_WIRELESS | STEAM_QUIRK_IBEX))
+		steam_battery_register(steam);
+
+	ret = steam_input_register(steam);
+	if (ret != 0)
+		goto steam_register_input_fail;
+	ret = steam_sensors_register(steam);
+	if (ret != 0)
+		goto steam_register_sensors_fail;
+
+	steam->registered = true;
+	mutex_unlock(&steam->registration_mutex);
+	mutex_lock(&steam_devices_lock);
+	if (list_empty(&steam->list))
+		list_add(&steam->list, &steam_devices);
+	mutex_unlock(&steam_devices_lock);
+	return 0;
+
+steam_register_sensors_fail:
+	steam_input_unregister(steam);
+steam_register_input_fail:
+	steam_battery_unregister(steam);
+	mutex_unlock(&steam->registration_mutex);
+	cancel_work_sync(&steam->rumble_work);
+	cancel_delayed_work_sync(&steam->mode_switch);
+	cancel_delayed_work_sync(&steam->coalesce_rumble_work);
+	return ret;
+}
+
+static void steam_unregister(struct steam_device *steam)
+{
+	if (!steam->registered)
+		return;
+
+	hid_info(steam->hdev, "Steam %s '%s' disconnected",
+			steam->quirks & STEAM_QUIRK_DECK ? "Deck" : "Controller",
+			steam->serial_no);
+	mutex_lock(&steam->registration_mutex);
+	steam->registered = false;
+	steam_battery_unregister(steam);
+	steam_sensors_unregister(steam);
+	steam_input_unregister(steam);
+	mutex_unlock(&steam->registration_mutex);
+	cancel_work_sync(&steam->rumble_work);
+	cancel_delayed_work_sync(&steam->mode_switch);
+	cancel_delayed_work_sync(&steam->coalesce_rumble_work);
+	mutex_lock(&steam_devices_lock);
+	list_del_init(&steam->list);
+	mutex_unlock(&steam_devices_lock);
+}
+
+static void steam_work_connect_cb(struct work_struct *work)
+{
+	struct steam_device *steam = container_of(work, struct steam_device,
+							work_connect);
+
+	unsigned long flags;
+	bool connected;
+	bool opened;
+	int ret;
+
+	spin_lock_irqsave(&steam->lock, flags);
+	opened = steam->client_opened;
+	connected = steam->connected;
+	spin_unlock_irqrestore(&steam->lock, flags);
+
+	if (connected && !opened) {
+		ret = steam_register(steam);
+		if (ret)
+			hid_err(steam->hdev,
+				"%s:steam_register failed with error %d\n",
+				__func__, ret);
+	} else {
+		steam_unregister(steam);
+	}
+}
+
+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;
+	bool gamepad_mode;
+
+	if (!lizard_mode)
+		return;
+
+	spin_lock_irqsave(&steam->lock, flags);
+	steam->gamepad_mode = !steam->gamepad_mode;
+	gamepad_mode = steam->gamepad_mode;
+	client_opened = steam->client_opened;
+	spin_unlock_irqrestore(&steam->lock, flags);
+
+	hid_dbg(steam->hdev, "%s: switching gamepad mode to %i\n", __func__, gamepad_mode);
+	if (gamepad_mode) {
+		guard(mutex)(&steam->report_mutex);
+		steam_set_lizard_mode(steam, false);
+	} else {
+		struct input_dev *input;
+		struct input_dev *sensors;
+
+		if (!client_opened) {
+			guard(mutex)(&steam->report_mutex);
+			steam_set_lizard_mode(steam, lizard_mode);
+		}
+
+		/*
+		 * Zero out inputs so it doesn't look like we're holding
+		 * anything indefinitely.
+		 */
+		guard(spinlock_irqsave)(&steam->lock);
+		rcu_read_lock();
+		input = rcu_dereference(steam->input);
+		if (likely(input)) {
+			input_report_key(input, BTN_TR2, 0);
+			input_report_key(input, BTN_TL2, 0);
+			input_report_key(input, BTN_TR, 0);
+			input_report_key(input, BTN_TL, 0);
+			input_report_key(input, BTN_Y, 0);
+			input_report_key(input, BTN_B, 0);
+			input_report_key(input, BTN_X, 0);
+			input_report_key(input, BTN_A, 0);
+			input_report_key(input, BTN_DPAD_UP, 0);
+			input_report_key(input, BTN_DPAD_RIGHT, 0);
+			input_report_key(input, BTN_DPAD_LEFT, 0);
+			input_report_key(input, BTN_DPAD_DOWN, 0);
+			input_report_key(input, BTN_SELECT, 0);
+			input_report_key(input, BTN_MODE, 0);
+			input_report_key(input, BTN_START, 0);
+			input_report_key(input, BTN_THUMBR, 0);
+			input_report_key(input, BTN_THUMBL, 0);
+			input_report_key(input, BTN_THUMB, 0);
+			input_report_key(input, BTN_THUMB2, 0);
+			input_report_key(input, BTN_GRIPL, 0);
+			input_report_key(input, BTN_GRIPR, 0);
+
+			input_report_abs(input, ABS_X, 0);
+			input_report_abs(input, ABS_Y, 0);
+			input_report_abs(input, ABS_RX, 0);
+			input_report_abs(input, ABS_RY, 0);
+			input_report_abs(input, ABS_HAT0X, 0);
+			input_report_abs(input, ABS_HAT0Y, 0);
+			input_report_abs(input, ABS_HAT2Y, 0);
+			input_report_abs(input, ABS_HAT2X, 0);
+
+			if (steam->quirks & (STEAM_QUIRK_DECK | STEAM_QUIRK_IBEX)) {
+				input_report_key(input, BTN_BASE, 0);
+				input_report_key(input, BTN_GRIPL2, 0);
+				input_report_key(input, BTN_GRIPR2, 0);
+
+				input_report_abs(input, ABS_HAT1X, 0);
+				input_report_abs(input, ABS_HAT1Y, 0);
+			}
+
+			input_sync(input);
+		}
+		sensors = rcu_dereference(steam->sensors);
+		if (likely(sensors)) {
+			/* Skip accelerometers since 0 isn't a neutral input */
+
+			input_report_abs(sensors, ABS_RX, 0);
+			input_report_abs(sensors, ABS_RY, 0);
+			input_report_abs(sensors, ABS_RZ, 0);
+
+			input_sync(sensors);
+		}
+		rcu_read_unlock();
+	}
+
+	guard(mutex)(&steam->report_mutex);
+	steam_haptic_pulse(steam, STEAM_PAD_RIGHT, 0x190, 0, 1, 0);
+	if (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, int quirks)
+{
+	struct hid_report_enum *rep_enum;
+
+	/*
+	 * The 2015 wired controller creates 3 interfaces:
+	 *  0: emulated mouse.
+	 *  1: emulated keyboard.
+	 *  2: the real game pad.
+	 * The 2015 wireless adapter creates 5 interfaces:
+	 *  0: emulated keyboard.
+	 *  1-4: slots where up to 4 real controllers will be connected to.
+	 * The Steam Deck creates 5 interfaces:
+	 *  0: emulated mouse.
+	 *  1: emulated keyboard.
+	 *  2: the real game pad.
+	 *  3-4: internal device comms (not HID).
+	 * The 2026 wired controller creates 1 unified interface.
+	 * The 2026 wireless puck creates 7 interfaces:
+	 *  0-1: internal device comms (not HID).
+	 *  2-5: slots where up to 4 real controllers will be connected to.
+	 *  6: basic pogo pin interface.
+	 *
+	 * We know which one is the real controller interface for the pre-2026
+	 * controllers because they are the only ones with a feature report.
+	 *
+	 * The puck's pogo pin interface should be ignored as it's stripped
+	 * down. It has one collection with usage page FF00 with usage ID 2.
+	 */
+	if (quirks & STEAM_QUIRK_IBEX) {
+		/* There is only one BLE HID interface */
+		if (quirks & STEAM_QUIRK_BLE)
+			return true;
+
+		if (hdev->maxcollection < 1)
+			return true;
+
+		return hdev->collection[0].usage != 0xFF000002;
+	}
+
+	rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
+	return !list_empty(&rep_enum->report_list);
+}
+
+static int steam_client_ll_parse(struct hid_device *hdev)
+{
+	struct steam_device *steam = hdev->driver_data;
+
+	return hid_parse_report(hdev, steam->hdev->dev_rdesc,
+			steam->hdev->dev_rsize);
+}
+
+static int steam_client_ll_start(struct hid_device *hdev)
+{
+	return 0;
+}
+
+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;
+
+	spin_lock_irqsave(&steam->lock, flags);
+	steam->client_opened++;
+	spin_unlock_irqrestore(&steam->lock, flags);
+
+	schedule_work(&steam->work_connect);
+
+	return 0;
+}
+
+static void steam_client_ll_close(struct hid_device *hdev)
+{
+	struct steam_device *steam = hdev->driver_data;
+
+	unsigned long flags;
+
+	spin_lock_irqsave(&steam->lock, flags);
+	steam->client_opened--;
+	spin_unlock_irqrestore(&steam->lock, flags);
+
+	schedule_work(&steam->work_connect);
+}
+
+static int steam_client_ll_raw_request(struct hid_device *hdev,
+				unsigned char reportnum, u8 *buf,
+				size_t count, unsigned char report_type,
+				int reqtype)
+{
+	struct steam_device *steam = hdev->driver_data;
+
+	return hid_hw_raw_request(steam->hdev, reportnum, buf, count,
+			report_type, reqtype);
+}
+
+static int steam_client_ll_output_report(struct hid_device *hdev,
+				u8 *buf, size_t count)
+{
+	struct steam_device *steam = hdev->driver_data;
+
+	return hid_hw_output_report(steam->hdev, buf, count);
+}
+
+static const struct hid_ll_driver steam_client_ll_driver = {
+	.parse = steam_client_ll_parse,
+	.start = steam_client_ll_start,
+	.stop = steam_client_ll_stop,
+	.open = steam_client_ll_open,
+	.close = steam_client_ll_close,
+	.raw_request = steam_client_ll_raw_request,
+	.output_report = steam_client_ll_output_report,
+};
+
+static struct hid_device *steam_create_client_hid(struct hid_device *hdev)
+{
+	struct hid_device *client_hdev;
+
+	client_hdev = hid_allocate_device();
+	if (IS_ERR(client_hdev))
+		return client_hdev;
+
+	client_hdev->ll_driver = &steam_client_ll_driver;
+	client_hdev->dev.parent = hdev->dev.parent;
+	client_hdev->bus = hdev->bus;
+	client_hdev->vendor = hdev->vendor;
+	client_hdev->product = hdev->product;
+	client_hdev->version = hdev->version;
+	client_hdev->type = hdev->type;
+	client_hdev->country = hdev->country;
+	strscpy(client_hdev->name, hdev->name,
+			sizeof(client_hdev->name));
+	strscpy(client_hdev->phys, hdev->phys,
+			sizeof(client_hdev->phys));
+	/*
+	 * Since we use the same device info than the real interface to
+	 * trick userspace, we will be calling steam_probe recursively.
+	 * We need to recognize the client interface somehow.
+	 */
+	client_hdev->group = HID_GROUP_STEAM;
+	return client_hdev;
+}
+
+static int steam_probe(struct hid_device *hdev,
+				const struct hid_device_id *id)
+{
+	struct steam_device *steam;
+	int ret;
+
+	ret = hid_parse(hdev);
+	if (ret) {
+		hid_err(hdev,
+			"%s:parse of hid interface failed\n", __func__);
+		return ret;
+	}
+
+	/*
+	 * The virtual client_dev is only used for hidraw.
+	 * Also avoid the recursive probe.
+	 */
+	if (hdev->group == HID_GROUP_STEAM)
+		return hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+	/*
+	 * The non-valve interfaces (mouse and keyboard emulation) are
+	 * connected without changes.
+	 */
+	if (!steam_is_valve_interface(hdev, id->driver_data))
+		return hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+
+	steam = devm_kzalloc(&hdev->dev, sizeof(*steam), GFP_KERNEL);
+	if (!steam)
+		return -ENOMEM;
+
+	steam->hdev = hdev;
+	hid_set_drvdata(hdev, steam);
+	spin_lock_init(&steam->lock);
+	mutex_init(&steam->report_mutex);
+	mutex_init(&steam->registration_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_WORK(&steam->rumble_work, steam_haptic_rumble_cb);
+	INIT_DELAYED_WORK(&steam->coalesce_rumble_work, steam_coalesce_rumble_cb);
+	steam->sensor_timestamp_us = 0;
+	if (steam->quirks & STEAM_QUIRK_DECK)
+		steam->sensor_update_rate_us = 4000;
+	else
+		steam->sensor_update_rate_us = 9000;
+
+	/*
+	 * With the real steam controller interface, do not connect hidraw.
+	 * Instead, create the client_hid and connect that.
+	 */
+	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_HIDRAW);
+	if (ret)
+		goto err_cancel_work;
+
+	ret = hid_hw_open(hdev);
+	if (ret) {
+		hid_err(hdev,
+			"%s:hid_hw_open\n",
+			__func__);
+		goto err_hw_stop;
+	}
+
+	steam->connected = true;
+
+	if (steam->quirks & STEAM_QUIRK_WIRELESS) {
+		hid_info(hdev, "Steam wireless receiver connected");
+		/* If using a wireless adaptor ask for connection status */
+		steam->connected = false;
+		ret = steam_get_conn_status(steam);
+		if (ret < 0)
+			hid_err(hdev,
+				"%s:steam_get_conn_status failed with error %d\n",
+				__func__, ret);
+		else if (ret == WIRELESS_EVENT_CONNECT)
+			steam->connected = true;
+	}
+	if (steam->connected) {
+		ret = steam_register(steam);
+		if (ret) {
+			hid_err(hdev,
+				"%s:steam_register failed with error %d\n",
+				__func__, ret);
+			goto err_hw_close;
+		}
+	}
+
+	steam->client_hdev = steam_create_client_hid(hdev);
+	if (IS_ERR(steam->client_hdev)) {
+		ret = PTR_ERR(steam->client_hdev);
+		goto err_steam_unregister;
+	}
+	steam->client_hdev->driver_data = steam;
+
+	ret = hid_add_device(steam->client_hdev);
+	if (ret)
+		goto err_destroy;
+
+	return 0;
+
+err_destroy:
+	hid_destroy_device(steam->client_hdev);
+err_steam_unregister:
+	if (steam->connected)
+		steam_unregister(steam);
+err_hw_close:
+	hid_hw_close(hdev);
+err_hw_stop:
+	hid_hw_stop(hdev);
+err_cancel_work:
+	cancel_work_sync(&steam->work_connect);
+	cancel_delayed_work_sync(&steam->mode_switch);
+	cancel_work_sync(&steam->rumble_work);
+	cancel_delayed_work_sync(&steam->coalesce_rumble_work);
+
+	return ret;
+}
+
+static void steam_remove(struct hid_device *hdev)
+{
+	struct steam_device *steam = hid_get_drvdata(hdev);
+	unsigned long flags;
+
+	if (!steam || hdev->group == HID_GROUP_STEAM) {
+		hid_hw_stop(hdev);
+		return;
+	}
+
+	hid_hw_close(hdev);
+	hid_destroy_device(steam->client_hdev);
+	spin_lock_irqsave(&steam->lock, flags);
+	steam->client_opened = 0;
+	spin_unlock_irqrestore(&steam->lock, flags);
+	cancel_work_sync(&steam->work_connect);
+	if (steam->quirks & STEAM_QUIRK_WIRELESS) {
+		hid_info(hdev, "Steam wireless receiver disconnected");
+	}
+	steam_unregister(steam);
+	hid_hw_stop(hdev);
+}
+
+static void steam_do_connect_event(struct steam_device *steam, bool connected)
+{
+	bool changed;
+
+	changed = steam->connected != connected;
+	steam->connected = connected;
+
+	if (changed && schedule_work(&steam->work_connect) == 0)
+		dbg_hid("%s: connected=%d event already queued\n",
+				__func__, connected);
+}
+
+/*
+ * Some input data in the protocol has the opposite sign.
+ * Clamp the values to 32767..-32767 so that the range is
+ * symmetrical and can be negated safely.
+ */
+static inline s16 steam_le16(const u8 *data)
+{
+	s16 x = (s16) get_unaligned_le16((const __le16 *)data);
+
+	return x == -32768 ? -32767 : x;
+}
+
+struct steam_button_mapping {
+	int code;
+	u8 byte;
+	u8 bit;
+};
+
+struct steam_axis_mapping {
+	int code;
+	s8 sign;
+	u8 byte;
+};
+
+static void steam_map_buttons(struct input_dev *input,
+		const struct steam_button_mapping *mappings, const u8 *data)
+{
+	const struct steam_button_mapping *mapping;
+
+	for (mapping = mappings; mapping->code; mapping++)
+		input_report_key(input, mapping->code,
+			data[mapping->byte] & BIT(mapping->bit));
+}
+
+static void steam_map_axes(struct input_dev *input,
+		const struct steam_axis_mapping *mappings, const u8 *data)
+{
+	const struct steam_axis_mapping *mapping;
+
+	for (mapping = mappings; mapping->sign; mapping++)
+		input_report_abs(input, mapping->code,
+			mapping->sign * steam_le16(&data[mapping->byte]));
+}
+
+/*
+ * The size for this message payload is 60.
+ * The known values are:
+ *  (* values are not sent through wireless)
+ *  (* accelerator/gyro is disabled by default)
+ *  Offset| Type  | Mapped to |Meaning
+ * -------+-------+-----------+--------------------------
+ *  4-7   | u32   | --        | sequence number
+ *  8-10  | 24bit | see below | buttons
+ *  11    | u8    | ABS_HAT2Y | left trigger
+ *  12    | u8    | ABS_HAT2X | right trigger
+ *  13-15 | --    | --        | always 0
+ *  16-17 | s16   | ABS_X/ABS_HAT0X     | X value
+ *  18-19 | s16   | ABS_Y/ABS_HAT0Y     | Y value
+ *  20-21 | s16   | ABS_RX    | right-pad X value
+ *  22-23 | s16   | ABS_RY    | right-pad Y value
+ *  24-25 | s16   | --        | * left trigger
+ *  26-27 | s16   | --        | * right trigger
+ *  28-29 | s16   | --        | * accelerometer X value
+ *  30-31 | s16   | --        | * accelerometer Y value
+ *  32-33 | s16   | --        | * accelerometer Z value
+ *  34-35 | s16   | --        | gyro X value
+ *  36-36 | s16   | --        | gyro Y value
+ *  38-39 | s16   | --        | gyro Z value
+ *  40-41 | s16   | --        | quaternion W value
+ *  42-43 | s16   | --        | quaternion X value
+ *  44-45 | s16   | --        | quaternion Y value
+ *  46-47 | s16   | --        | quaternion Z value
+ *  48-49 | --    | --        | always 0
+ *  50-51 | s16   | --        | * left trigger (uncalibrated)
+ *  52-53 | s16   | --        | * right trigger (uncalibrated)
+ *  54-55 | s16   | --        | * joystick X value (uncalibrated)
+ *  56-57 | s16   | --        | * joystick Y value (uncalibrated)
+ *  58-59 | s16   | --        | * left-pad X value
+ *  60-61 | s16   | --        | * left-pad Y value
+ *  62-63 | u16   | --        | * battery voltage
+ *
+ * The buttons are:
+ *  Bit  | Mapped to  | Description
+ * ------+------------+--------------------------------
+ *  8.0  | BTN_TR2    | right trigger fully pressed
+ *  8.1  | BTN_TL2    | left trigger fully pressed
+ *  8.2  | BTN_TR     | right shoulder
+ *  8.3  | BTN_TL     | left shoulder
+ *  8.4  | BTN_Y      | button Y
+ *  8.5  | BTN_B      | button B
+ *  8.6  | BTN_X      | button X
+ *  8.7  | BTN_A      | button A
+ *  9.0  | BTN_DPAD_UP    | left-pad up
+ *  9.1  | BTN_DPAD_RIGHT | left-pad right
+ *  9.2  | BTN_DPAD_LEFT  | left-pad left
+ *  9.3  | BTN_DPAD_DOWN  | left-pad down
+ *  9.4  | BTN_SELECT | view
+ *  9.5  | BTN_MODE   | steam logo
+ *  9.6  | BTN_START  | menu
+ *  9.7  | BTN_GRIPL  | left back lever
+ * 10.0  | BTN_GRIPR  | right back lever
+ * 10.1  | --         | left-pad clicked
+ * 10.2  | BTN_THUMBR | right-pad clicked
+ * 10.3  | BTN_THUMB  | left-pad touched (but see explanation below)
+ * 10.4  | BTN_THUMB2 | right-pad touched
+ * 10.5  | --         | unknown
+ * 10.6  | BTN_THUMBL | joystick clicked
+ * 10.7  | --         | lpad_and_joy
+ */
+
+static const struct steam_button_mapping steam_controller_button_mappings[] = {
+	{ BTN_TR2,		 8, 0 },
+	{ BTN_TL2,		 8, 1 },
+	{ BTN_TR,		 8, 2 },
+	{ BTN_TL,		 8, 3 },
+	{ BTN_Y,		 8, 4 },
+	{ BTN_B,		 8, 5 },
+	{ BTN_X,		 8, 6 },
+	{ BTN_A,		 8, 7 },
+	{ BTN_SELECT,		 9, 4 },
+	{ BTN_MODE,		 9, 5 },
+	{ BTN_START,		 9, 6 },
+	{ BTN_GRIPL,		 9, 7 },
+	{ BTN_GRIPR,		10, 0 },
+	{ BTN_THUMBR,		10, 2 },
+	{ BTN_THUMBL,		10, 6 },
+	{ BTN_THUMB2,		10, 4 },
+	{ BTN_DPAD_UP,		 9, 0 },
+	{ BTN_DPAD_RIGHT,	 9, 1 },
+	{ BTN_DPAD_LEFT,	 9, 2 },
+	{ BTN_DPAD_DOWN,	 9, 3 },
+	{ /* sentinel */ },
+};
+
+static const struct steam_axis_mapping steam_controller_axis_mappings[] = {
+	{ ABS_RX,  1, 20 },
+	{ ABS_RY, -1, 22 },
+	{ /* sentinel */ },
+};
+
+static const struct steam_axis_mapping steam_controller_imu_mappings[] = {
+	{ ABS_X,   1, 28 },
+	{ ABS_Z,  -1, 30 },
+	{ ABS_Y,   1, 32 },
+	{ ABS_RX,  1, 34 },
+	{ ABS_RZ,  1, 36 },
+	{ ABS_RY,  1, 38 },
+	{ /* sentinel */ },
+};
+
+static void steam_do_input_event(struct steam_device *steam,
+		struct input_dev *input, u8 *data)
+{
+	s16 x, y;
+	bool lpad_touched, lpad_and_joy;
+
+	input_report_abs(input, ABS_HAT2Y, data[11]);
+	input_report_abs(input, ABS_HAT2X, data[12]);
+
+	/*
+	 * These two bits tells how to interpret the values X and Y.
+	 * lpad_and_joy tells that the joystick and the lpad are used at the
+	 * same time.
+	 * lpad_touched tells whether X/Y are to be read as lpad coord or
+	 * joystick values.
+	 * (lpad_touched || lpad_and_joy) tells if the lpad is really touched.
+	 */
+	lpad_touched = data[10] & BIT(3);
+	lpad_and_joy = data[10] & BIT(7);
+	x = steam_le16(data + 16);
+	y = -steam_le16(data + 18);
+
+	input_report_abs(input, lpad_touched ? ABS_HAT0X : ABS_X, x);
+	input_report_abs(input, lpad_touched ? ABS_HAT0Y : ABS_Y, y);
+	/* Check if joystick is centered */
+	if (lpad_touched && !lpad_and_joy) {
+		input_report_abs(input, ABS_X, 0);
+		input_report_abs(input, ABS_Y, 0);
+	}
+	/* Check if lpad is untouched */
+	if (!(lpad_touched || lpad_and_joy)) {
+		input_report_abs(input, ABS_HAT0X, 0);
+		input_report_abs(input, ABS_HAT0Y, 0);
+	}
+	input_report_key(input, BTN_THUMB, lpad_touched || lpad_and_joy);
+
+	steam_map_buttons(input, steam_controller_button_mappings, data);
+	steam_map_axes(input, steam_controller_axis_mappings, data);
+
+	input_sync(input);
+}
+
+static void steam_do_sensors_event(struct steam_device *steam,
+		struct input_dev *sensors, u8 *data)
+{
+	steam->sensor_timestamp_us += steam->sensor_update_rate_us;
+
+	input_event(sensors, EV_MSC, MSC_TIMESTAMP, steam->sensor_timestamp_us);
+	steam_map_axes(sensors, steam_controller_imu_mappings, data);
+
+	input_sync(sensors);
+}
+
+/*
+ * The size for this message payload is 56.
+ * The known values are:
+ *  Offset| Type  | Mapped to |Meaning
+ * -------+-------+-----------+--------------------------
+ *  4-7   | u32   | --        | sequence number
+ *  8-15  | u64   | see below | buttons
+ *  16-17 | s16   | ABS_HAT0X | left-pad X value
+ *  18-19 | s16   | ABS_HAT0Y | left-pad Y value
+ *  20-21 | s16   | ABS_HAT1X | right-pad X value
+ *  22-23 | s16   | ABS_HAT1Y | right-pad Y value
+ *  24-25 | s16   | IMU ABS_X | accelerometer X value
+ *  26-27 | s16   | IMU ABS_Z | accelerometer Y value
+ *  28-29 | s16   | IMU ABS_Y | accelerometer Z value
+ *  30-31 | s16   | IMU ABS_RX | gyro X value
+ *  32-33 | s16   | IMU ABS_RZ | gyro Y value
+ *  34-35 | s16   | IMU ABS_RY | gyro Z value
+ *  36-37 | s16   | --        | quaternion W value
+ *  38-39 | s16   | --        | quaternion X value
+ *  40-41 | s16   | --        | quaternion Y value
+ *  42-43 | s16   | --        | quaternion Z value
+ *  44-45 | u16   | ABS_HAT2Y | left trigger (uncalibrated)
+ *  46-47 | u16   | ABS_HAT2X | right trigger (uncalibrated)
+ *  48-49 | s16   | ABS_X     | left joystick X
+ *  50-51 | s16   | ABS_Y     | left joystick Y
+ *  52-53 | s16   | ABS_RX    | right joystick X
+ *  54-55 | s16   | ABS_RY    | right joystick Y
+ *  56-57 | u16   | --        | left pad pressure
+ *  58-59 | u16   | --        | right pad pressure
+ *
+ * The buttons are:
+ *  Bit  | Mapped to  | Description
+ * ------+------------+--------------------------------
+ *  8.0  | BTN_TR2    | right trigger fully pressed
+ *  8.1  | BTN_TL2    | left trigger fully pressed
+ *  8.2  | BTN_TR     | right shoulder
+ *  8.3  | BTN_TL     | left shoulder
+ *  8.4  | BTN_Y      | button Y
+ *  8.5  | BTN_B      | button B
+ *  8.6  | BTN_X      | button X
+ *  8.7  | BTN_A      | button A
+ *  9.0  | BTN_DPAD_UP    | left-pad up
+ *  9.1  | BTN_DPAD_RIGHT | left-pad right
+ *  9.2  | BTN_DPAD_LEFT  | left-pad left
+ *  9.3  | BTN_DPAD_DOWN  | left-pad down
+ *  9.4  | BTN_SELECT | view
+ *  9.5  | BTN_MODE   | steam logo
+ *  9.6  | BTN_START  | menu
+ *  9.7  | BTN_GRIPL2 | left bottom grip button
+ *  10.0 | BTN_GRIPR2 | right bottom grip button
+ *  10.1 | BTN_THUMB  | left pad pressed
+ *  10.2 | BTN_THUMB2 | right pad pressed
+ *  10.3 | --         | left pad touched
+ *  10.4 | --         | right pad touched
+ *  10.5 | --         | unknown
+ *  10.6 | BTN_THUMBL | left joystick clicked
+ *  10.7 | --         | unknown
+ *  11.0 | --         | unknown
+ *  11.1 | --         | unknown
+ *  11.2 | BTN_THUMBR | right joystick clicked
+ *  11.3 | --         | unknown
+ *  11.4 | --         | unknown
+ *  11.5 | --         | unknown
+ *  11.6 | --         | unknown
+ *  11.7 | --         | unknown
+ *  12.0 | --         | unknown
+ *  12.1 | --         | unknown
+ *  12.2 | --         | unknown
+ *  12.3 | --         | unknown
+ *  12.4 | --         | unknown
+ *  12.5 | --         | unknown
+ *  12.6 | --         | unknown
+ *  12.7 | --         | unknown
+ *  13.0 | --         | unknown
+ *  13.1 | BTN_GRIPL  | left top grip button
+ *  13.2 | BTN_GRIPR  | right top grip button
+ *  13.3 | --         | unknown
+ *  13.4 | --         | unknown
+ *  13.5 | --         | unknown
+ *  13.6 | --         | left joystick touched
+ *  13.7 | --         | right joystick touched
+ *  14.0 | --         | unknown
+ *  14.1 | --         | unknown
+ *  14.2 | BTN_BASE   | quick access button
+ *  14.3 | --         | unknown
+ *  14.4 | --         | unknown
+ *  14.5 | --         | unknown
+ *  14.6 | --         | unknown
+ *  14.7 | --         | unknown
+ *  15.0 | --         | unknown
+ *  15.1 | --         | unknown
+ *  15.2 | --         | unknown
+ *  15.3 | --         | unknown
+ *  15.4 | --         | unknown
+ *  15.5 | --         | unknown
+ *  15.6 | --         | unknown
+ *  15.7 | --         | unknown
+ */
+
+static const struct steam_button_mapping steam_deck_button_mappings[] = {
+	{ BTN_TR2,		 8, 0 },
+	{ BTN_TL2,		 8, 1 },
+	{ BTN_TR,		 8, 2 },
+	{ BTN_TL,		 8, 3 },
+	{ BTN_Y,		 8, 4 },
+	{ BTN_B,		 8, 5 },
+	{ BTN_X,		 8, 6 },
+	{ BTN_A,		 8, 7 },
+	{ BTN_SELECT,		 9, 4 },
+	{ BTN_MODE,		 9, 5 },
+	{ BTN_START,		 9, 6 },
+	{ BTN_GRIPL2,		 9, 7 },
+	{ BTN_GRIPR2,		10, 0 },
+	{ BTN_THUMBL,		10, 6 },
+	{ BTN_THUMBR,		11, 2 },
+	{ BTN_DPAD_UP,		 9, 0 },
+	{ BTN_DPAD_RIGHT,	 9, 1 },
+	{ BTN_DPAD_LEFT,	 9, 2 },
+	{ BTN_DPAD_DOWN,	 9, 3 },
+	{ BTN_THUMB,		10, 1 },
+	{ BTN_THUMB2,		10, 2 },
+	{ BTN_GRIPL,		13, 1 },
+	{ BTN_GRIPR,		13, 2 },
+	{ BTN_BASE,		14, 2 },
+	{ /* sentinel */ },
+};
+
+static const struct steam_axis_mapping steam_deck_axis_mappings[] = {
+	{ ABS_X,	 1, 48 },
+	{ ABS_Y,	-1, 50 },
+	{ ABS_RX,	 1, 52 },
+	{ ABS_RY,	-1, 54 },
+	{ ABS_HAT2Y,	 1, 44 },
+	{ ABS_HAT2X,	 1, 46 },
+	{ /* sentinel */ },
+};
+
+static const struct steam_axis_mapping steam_deck_imu_mappings[] = {
+	{ ABS_X,   1, 24 },
+	{ ABS_Z,  -1, 26 },
+	{ ABS_Y,   1, 28 },
+	{ ABS_RX,  1, 30 },
+	{ ABS_RZ, -1, 32 },
+	{ ABS_RY,  1, 34 },
+	{ /* sentinel */ },
+};
+
+static void steam_do_deck_input_event(struct steam_device *steam,
+		struct input_dev *input, u8 *data)
+{
+	bool start_pressed;
+	bool lpad_touched, rpad_touched;
+
+	start_pressed = data[9] & BIT(6);
+
+	if (!start_pressed && steam->did_mode_switch) {
+		steam->did_mode_switch = false;
+		cancel_delayed_work(&steam->mode_switch);
+	} else if (!steam->client_opened && start_pressed && !steam->did_mode_switch) {
+		hid_dbg(steam->hdev, "%s: doing mode switch\n", __func__);
+		steam->did_mode_switch = true;
+		schedule_delayed_work(&steam->mode_switch, 45 * HZ / 100);
+	}
+
+	if (!steam->gamepad_mode && lizard_mode)
+		return;
+
+	lpad_touched = data[10] & BIT(3);
+	rpad_touched = data[10] & BIT(4);
+
+	if (lpad_touched) {
+		input_report_abs(input, ABS_HAT0X, steam_le16(data + 16));
+		input_report_abs(input, ABS_HAT0Y, steam_le16(data + 18));
+	} else {
+		input_report_abs(input, ABS_HAT0X, 0);
+		input_report_abs(input, ABS_HAT0Y, 0);
+	}
+
+	if (rpad_touched) {
+		input_report_abs(input, ABS_HAT1X, steam_le16(data + 20));
+		input_report_abs(input, ABS_HAT1Y, steam_le16(data + 22));
+	} else {
+		input_report_abs(input, ABS_HAT1X, 0);
+		input_report_abs(input, ABS_HAT1Y, 0);
+	}
+
+	steam_map_buttons(input, steam_deck_button_mappings, data);
+	steam_map_axes(input, steam_deck_axis_mappings, data);
+
+	input_sync(input);
+}
+
+static void steam_do_deck_sensors_event(struct steam_device *steam,
+		struct input_dev *sensors, u8 *data)
+{
+	steam->sensor_timestamp_us += steam->sensor_update_rate_us;
+
+	if (!steam->gamepad_mode && lizard_mode)
+		return;
+
+	input_event(sensors, EV_MSC, MSC_TIMESTAMP, steam->sensor_timestamp_us);
+	steam_map_axes(sensors, steam_deck_imu_mappings, data);
+
+	input_sync(sensors);
+}
+
+/*
+ * The size for this message payload is 11.
+ * The known values are:
+ *  Offset| Type  | Meaning
+ * -------+-------+---------------------------
+ *  4-7   | u32   | sequence number
+ *  8-11  | --    | always 0
+ *  12-13 | u16   | voltage (mV)
+ *  14    | u8    | battery percent
+ */
+static void steam_do_battery_event(struct steam_device *steam,
+		struct power_supply *battery, u8 *data)
+{
+	s16 volts = steam_le16(data + 12);
+	u8 batt = data[14];
+
+	/* Creating the battery may have failed */
+	rcu_read_lock();
+	battery = rcu_dereference(steam->battery);
+	if (likely(battery)) {
+		steam->battery_voltage = volts;
+		steam->battery_charge = batt;
+		power_supply_changed(battery);
+	}
+	rcu_read_unlock();
+}
+
+/*
+ * The size for this message payload is 53 in REPORT_ID_INPUT and 45 in REPORT_ID_INPUT2.
+ * The values are:
+ *  (* values only in REPORT_ID_INPUT)
+ *  Offset| Type  | Mapped to |Meaning
+ * -------+-------+-----------+--------------------------
+ *  1     | u8    | --        | sequence number
+ *  2-5   | u32   | see below | buttons
+ *  6-7   | s16   | ABS_HAT2Y | left trigger (uncalibrated)
+ *  8-9   | s16   | ABS_HAT2X | right trigger (uncalibrated)
+ *  10-11 | s16   | ABS_X     | left joystick X
+ *  12-13 | s16   | ABS_Y     | left joystick Y
+ *  14-15 | s16   | ABS_RX    | right joystick X
+ *  16-17 | s16   | ABS_RY    | right joystick Y
+ *  18-19 | s16   | ABS_HAT0X | left-pad X value
+ *  20-21 | s16   | ABS_HAT0Y | left-pad Y value
+ *  22-23 | u16   | --        | left pad pressure
+ *  24-25 | s16   | ABS_HAT1X | right-pad X value
+ *  26-27 | s16   | ABS_HAT1Y | right-pad Y value
+ *  28-29 | u16   | --        | right pad pressure
+ *  30-33 | u32   | IMU MSC_TIMESTAMP | IMU timestamp
+ *  34-35 | s16   | IMU ABS_X | accelerometer X value
+ *  36-37 | s16   | IMU ABS_Z | accelerometer Y value
+ *  38-39 | s16   | IMU ABS_Y | accelerometer Z value
+ *  40-41 | s16   | IMU ABS_RX | gyro X value
+ *  42-43 | s16   | IMU ABS_RZ | gyro Y value
+ *  44-45 | s16   | IMU ABS_RY | gyro Z value
+ *  46-47 | s16   | --        | * quaternion W value
+ *  48-49 | s16   | --        | * quaternion X value
+ *  50-51 | s16   | --        | * quaternion Y value
+ *  52-53 | s16   | --        | * quaternion Z value
+ *
+ * The buttons are:
+ *  Bit  | Mapped to  | Description
+ * ------+------------+--------------------------------
+ *  2.0  | BTN_A      | button A
+ *  2.1  | BTN_B      | button B
+ *  2.2  | BTN_X      | button X
+ *  2.3  | BTN_Y      | button Y
+ *  2.4  | BTN_BASE   | quick access button
+ *  2.5  | BTN_THUMBR | right joystick clicked
+ *  2.6  | BTN_START  | menu
+ *  2.7  | BTN_GRIPR  | right top grip button
+ *  3.0  | BTN_GRIPR2 | right bottom grip button
+ *  3.1  | BTN_TR     | right shoulder
+ *  3.2  | BTN_DPAD_DOWN  | left-pad down
+ *  3.3  | BTN_DPAD_RIGHT | left-pad right
+ *  3.4  | BTN_DPAD_LEFT  | left-pad left
+ *  3.5  | BTN_DPAD_UP    | left-pad up
+ *  3.6  | BTN_SELECT | view
+ *  3.7  | BTN_THUMBL | left joystick clicked
+ *  4.0  | BTN_MODE   | steam logo
+ *  4.1  | BTN_GRIPL  | left top grip button
+ *  4.2  | BTN_GRIPL2 | left bottom grip button
+ *  4.3  | BTN_TL     | left shoulder
+ *  4.4  | --         | right joystick touched
+ *  4.5  | --         | right pad touched
+ *  4.6  | BTN_THUMB2 | right pad pressed
+ *  4.7  | BTN_TR2    | right trigger fully pressed
+ *  5.0  | --         | left joystick touched
+ *  5.1  | --         | left pad touched
+ *  5.2  | BTN_THUMB  | left pad pressed
+ *  5.3  | BTN_TL2    | left trigger fully pressed
+ *  5.4  | --         | right grip touch
+ *  5.5  | --         | left grip touch
+ *  5.6  | --         | unmapped
+ *  5.7  | --         | unmapped
+ */
+
+static const struct steam_button_mapping steam_ibex_button_mappings[] = {
+	{ BTN_A,		2, 0 },
+	{ BTN_B,		2, 1 },
+	{ BTN_X,		2, 2 },
+	{ BTN_Y,		2, 3 },
+	{ BTN_BASE,		2, 4 },
+	{ BTN_THUMBR,		2, 5 },
+	{ BTN_START,		2, 6 },
+	{ BTN_GRIPR,		2, 7 },
+	{ BTN_GRIPR2,		3, 0 },
+	{ BTN_TR,		3, 1 },
+	{ BTN_DPAD_DOWN,	3, 2 },
+	{ BTN_DPAD_RIGHT,	3, 3 },
+	{ BTN_DPAD_LEFT,	3, 4 },
+	{ BTN_DPAD_UP,		3, 5 },
+	{ BTN_SELECT,		3, 6 },
+	{ BTN_THUMBL,		3, 7 },
+	{ BTN_MODE,		4, 0 },
+	{ BTN_GRIPL,		4, 1 },
+	{ BTN_GRIPL2,		4, 2 },
+	{ BTN_TL,		4, 3 },
+	{ BTN_THUMB2,		4, 6 },
+	{ BTN_TR2,		4, 7 },
+	{ BTN_THUMB,		5, 2 },
+	{ BTN_TL2,		5, 3 },
+	{ /* sentinel */ },
+};
+
+static const struct steam_axis_mapping steam_ibex_axis_mappings[] = {
+	{ ABS_X,	 1, 10 },
+	{ ABS_Y,	-1, 12 },
+	{ ABS_RX,	 1, 14 },
+	{ ABS_RY,	-1, 16 },
+	{ ABS_HAT2Y,	 1, 6 },
+	{ ABS_HAT2X,	 1, 8 },
+	{ /* sentinel */ },
+};
+
+static const struct steam_axis_mapping steam_ibex_imu_mappings[] = {
+	{ ABS_X,   1, 34 },
+	{ ABS_Z,  -1, 36 },
+	{ ABS_Y,   1, 38 },
+	{ ABS_RX,  1, 40 },
+	{ ABS_RZ, -1, 42 },
+	{ ABS_RY,  1, 44 },
+	{ /* sentinel */ },
+};
+
+static void steam_do_ibex_input_event(struct steam_device *steam,
+		struct input_dev *input, const u8 *data)
+{
+	bool start_pressed;
+	bool lpad_touched, rpad_touched;
+
+	start_pressed = data[2] & BIT(6);
+
+	if (!start_pressed && steam->did_mode_switch) {
+		steam->did_mode_switch = false;
+		cancel_delayed_work(&steam->mode_switch);
+	} else if (!steam->client_opened && start_pressed && !steam->did_mode_switch) {
+		steam->did_mode_switch = true;
+		schedule_delayed_work(&steam->mode_switch, 45 * HZ / 100);
+	}
+
+	if (!steam->gamepad_mode && lizard_mode)
+		return;
+
+	lpad_touched = data[5] & BIT(1);
+	rpad_touched = data[4] & BIT(5);
+
+	if (lpad_touched) {
+		input_report_abs(input, ABS_HAT0X, steam_le16(data + 18));
+		input_report_abs(input, ABS_HAT0Y, steam_le16(data + 20));
+	} else {
+		input_report_abs(input, ABS_HAT0X, 0);
+		input_report_abs(input, ABS_HAT0Y, 0);
+	}
+
+	if (rpad_touched) {
+		input_report_abs(input, ABS_HAT1X, steam_le16(data + 24));
+		input_report_abs(input, ABS_HAT1Y, steam_le16(data + 26));
+	} else {
+		input_report_abs(input, ABS_HAT1X, 0);
+		input_report_abs(input, ABS_HAT1Y, 0);
+	}
+	steam_map_buttons(input, steam_ibex_button_mappings, data);
+	steam_map_axes(input, steam_ibex_axis_mappings, data);
+
+	input_sync(input);
+}
+
+static void steam_do_ibex_sensors_event(struct steam_device *steam,
+		struct input_dev *sensors, const u8 *data)
+{
+	u32 timestamp;
+
+	if (!steam->gamepad_mode && lizard_mode)
+		return;
+
+	timestamp = (u32) get_unaligned_le32((__le32 *)&data[30]);
+	input_event(sensors, EV_MSC, MSC_TIMESTAMP, timestamp);
+	steam_map_axes(sensors, steam_ibex_imu_mappings, data);
+
+	input_sync(sensors);
+}
+
+static void steam_do_ibex_battery_event(struct steam_device *steam,
+		struct power_supply *battery,
+		const struct steam_ibex_battery_status *data)
+{
+	/* Creating the battery may have failed */
+	guard(rcu)();
+	battery = rcu_dereference(steam->battery);
+	if (!likely(battery))
+		return;
+
+	steam->battery_voltage = get_unaligned_le16(&data->battery_voltage);
+	steam->battery_current = get_unaligned_le16(&data->battery_current);
+	steam->battery_temp = get_unaligned_le16(&data->temperature);
+	steam->battery_charge = data->battery_level;
+	switch (data->charge_state) {
+	case CHARGE_STATE_CHARGING:
+		steam->battery_status = POWER_SUPPLY_STATUS_CHARGING;
+		break;
+	case CHARGE_STATE_DISCHARGING:
+		steam->battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
+		break;
+	case CHARGE_STATE_CHARGING_DONE:
+		steam->battery_status = POWER_SUPPLY_STATUS_FULL;
+		break;
+	default:
+		steam->battery_status = POWER_SUPPLY_STATUS_UNKNOWN;
+		break;
+	}
+	power_supply_changed(battery);
+}
+
+static int steam_raw_event(struct hid_device *hdev,
+			struct hid_report *report, u8 *data,
+			int size)
+{
+	struct steam_device *steam = hid_get_drvdata(hdev);
+	struct input_dev *input;
+	struct input_dev *sensors;
+	struct power_supply *battery;
+
+	if (!steam)
+		return 0;
+
+	guard(spinlock_irqsave)(&steam->lock);
+	if (steam->client_opened)
+		hid_input_report(steam->client_hdev, report->type, data, size, 0);
+
+	/* Ibex uses a different report format */
+	if (steam->quirks & STEAM_QUIRK_IBEX) {
+		if (report->type != HID_INPUT_REPORT)
+			return 0;
+
+		switch (report->id) {
+		case REPORT_ID_INPUT:
+			if (size != 54)
+				return 0;
+			if (steam->client_opened)
+				return 0;
+			rcu_read_lock();
+			input = rcu_dereference(steam->input);
+			if (likely(input)) {
+				steam_do_ibex_input_event(steam, input, data);
+			} else {
+				dbg_hid("%s: input data without connect event\n",
+					__func__);
+				steam_do_connect_event(steam, true);
+			}
+			sensors = rcu_dereference(steam->sensors);
+			if (likely(sensors))
+				steam_do_ibex_sensors_event(steam, sensors, data);
+			rcu_read_unlock();
+			break;
+		case REPORT_ID_INPUT2:
+			if (size != 46)
+				return 0;
+			if (steam->client_opened)
+				return 0;
+			rcu_read_lock();
+			input = rcu_dereference(steam->input);
+			if (likely(input)) {
+				steam_do_ibex_input_event(steam, input, data);
+			} else {
+				dbg_hid("%s: input data without connect event\n",
+					__func__);
+				steam_do_connect_event(steam, true);
+			}
+			sensors = rcu_dereference(steam->sensors);
+			if (likely(sensors))
+				steam_do_ibex_sensors_event(steam, sensors, data);
+			rcu_read_unlock();
+			break;
+		case REPORT_ID_BATTERY:
+			if (size != 15)
+				return 0;
+			rcu_read_lock();
+			battery = rcu_dereference(steam->battery);
+			if (likely(battery)) {
+				steam_do_ibex_battery_event(steam, battery,
+					(const struct steam_ibex_battery_status *)&data[1]);
+			} else {
+				dbg_hid("%s: battery data without connect event\n",
+					__func__);
+				steam_do_connect_event(steam, true);
+			}
+			rcu_read_unlock();
+			break;
+		case REPORT_ID_WIRELESS_EVENT:
+			if (size != 2)
+				return 0;
+			switch (data[1]) {
+			case WIRELESS_EVENT_DISCONNECT:
+				steam_do_connect_event(steam, false);
+				break;
+			case WIRELESS_EVENT_CONNECT:
+				steam_do_connect_event(steam, true);
+				break;
+			}
+			break;
+		}
+
+		return 0;
+	}
+
+	/*
+	 * All messages are size=64, all values little-endian.
+	 * The format is:
+	 *  Offset| Meaning
+	 * -------+--------------------------------------------
+	 *  0-1   | always 0x01, 0x00, maybe protocol version?
+	 *  2     | type of message
+	 *  3     | length of the real payload (not checked)
+	 *  4-n   | payload data, depends on the type
+	 *
+	 * There are these known types of message:
+	 *  0x01: input data (60 bytes)
+	 *  0x03: wireless connect/disconnect (1 byte)
+	 *  0x04: battery status (11 bytes)
+	 *  0x09: Steam Deck input data (56 bytes)
+	 */
+
+	if (size != 64 || data[0] != 1 || data[1] != 0)
+		return 0;
+
+	switch (data[2]) {
+	case ID_CONTROLLER_STATE:
+		if (steam->client_opened)
+			return 0;
+		rcu_read_lock();
+		input = rcu_dereference(steam->input);
+		if (likely(input))
+			steam_do_input_event(steam, input, data);
+		sensors = rcu_dereference(steam->sensors);
+		if (likely(sensors))
+			steam_do_sensors_event(steam, sensors, data);
+		rcu_read_unlock();
+		break;
+	case ID_CONTROLLER_DECK_STATE:
+		if (steam->client_opened)
+			return 0;
+		rcu_read_lock();
+		input = rcu_dereference(steam->input);
+		if (likely(input))
+			steam_do_deck_input_event(steam, input, data);
+		sensors = rcu_dereference(steam->sensors);
+		if (likely(sensors))
+			steam_do_deck_sensors_event(steam, sensors, data);
+		rcu_read_unlock();
+		break;
+	case ID_CONTROLLER_WIRELESS:
+		/*
+		 * The payload of this event is a single byte:
+		 *  0x01: disconnected.
+		 *  0x02: connected.
+		 */
+		switch (data[4]) {
+		case 0x01:
+			steam_do_connect_event(steam, false);
+			break;
+		case 0x02:
+			steam_do_connect_event(steam, true);
+			break;
+		}
+		break;
+	case ID_CONTROLLER_STATUS:
+		if (steam->quirks & STEAM_QUIRK_WIRELESS) {
+			rcu_read_lock();
+			battery = rcu_dereference(steam->battery);
+			if (likely(battery)) {
+				steam_do_battery_event(steam, battery, data);
+			} else {
+				dbg_hid(
+					"%s: battery data without connect event\n",
+					__func__);
+				steam_do_connect_event(steam, true);
+			}
+			rcu_read_unlock();
+		}
+		break;
+	}
+	return 0;
+}
+
+static int steam_param_set_lizard_mode(const char *val,
+					const struct kernel_param *kp)
+{
+	struct steam_device *steam;
+	int ret;
+	bool client_opened;
+	unsigned long flags;
+
+	ret = param_set_bool(val, kp);
+	if (ret)
+		return ret;
+
+	mutex_lock(&steam_devices_lock);
+	list_for_each_entry(steam, &steam_devices, list) {
+		spin_lock_irqsave(&steam->lock, flags);
+		client_opened = steam->client_opened;
+		spin_unlock_irqrestore(&steam->lock, flags);
+		if (!client_opened) {
+			guard(mutex)(&steam->report_mutex);
+			steam_set_lizard_mode(steam, lizard_mode);
+		}
+	}
+	mutex_unlock(&steam_devices_lock);
+	return 0;
+}
+
+static const struct kernel_param_ops steam_lizard_mode_ops = {
+	.set	= steam_param_set_lizard_mode,
+	.get	= param_get_bool,
+};
+
+module_param_cb(lizard_mode, &steam_lizard_mode_ops, &lizard_mode, 0644);
+MODULE_PARM_DESC(lizard_mode,
+	"Enable mouse and keyboard emulation (lizard mode) when the gamepad is not in use");
+
+static const struct hid_device_id steam_controllers[] = {
+	{ /* Wired Steam Controller (2015) */
+	  HID_USB_DEVICE(USB_VENDOR_ID_VALVE,
+		USB_DEVICE_ID_STEAM_CONTROLLER)
+	},
+	{ /* Wireless Steam Controller (2015) */
+	  HID_USB_DEVICE(USB_VENDOR_ID_VALVE,
+		USB_DEVICE_ID_STEAM_CONTROLLER_WIRELESS),
+	  .driver_data = STEAM_QUIRK_WIRELESS
+	},
+	{ /* Steam Deck */
+	  HID_USB_DEVICE(USB_VENDOR_ID_VALVE,
+		USB_DEVICE_ID_STEAM_DECK),
+	  .driver_data = STEAM_QUIRK_DECK
+	},
+	{ /* Steam Controller (2026) wired */
+	  HID_USB_DEVICE(USB_VENDOR_ID_VALVE,
+		USB_DEVICE_ID_STEAM_CONTROLLER_IBEX),
+	  .driver_data = STEAM_QUIRK_IBEX
+	},
+	{ /* Steam Controller (2026) BLE */
+	  HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_VALVE,
+		USB_DEVICE_ID_STEAM_CONTROLLER_IBEX_BLE),
+	  .driver_data = STEAM_QUIRK_IBEX | STEAM_QUIRK_BLE
+	},
+	{ /* Steam Controller (2026) Puck */
+	  HID_USB_DEVICE(USB_VENDOR_ID_VALVE,
+		USB_DEVICE_ID_STEAM_CONTROLLER_PROTEUS),
+	  .driver_data = STEAM_QUIRK_IBEX | STEAM_QUIRK_WIRELESS
+	},
+	{ /* Steam Controller (2026) Steam Machine internal receiver */
+	  HID_USB_DEVICE(USB_VENDOR_ID_VALVE,
+		USB_DEVICE_ID_STEAM_CONTROLLER_NEREID),
+	  .driver_data = STEAM_QUIRK_IBEX | STEAM_QUIRK_WIRELESS
+	},
+	{}
+};
+
+MODULE_DEVICE_TABLE(hid, steam_controllers);
+
+static struct hid_driver steam_controller_driver = {
+	.name = "hid-steam",
+	.id_table = steam_controllers,
+	.probe = steam_probe,
+	.remove = steam_remove,
+	.raw_event = steam_raw_event,
+};
+
+module_hid_driver(steam_controller_driver);
author	Steven Rostedt <rostedt@goodmis.org>	2026-09-02 09:55:01 -0400
committer	Steven Rostedt <rostedt@goodmis.org>	2026-09-02 11:08:21 -0400
commit	4617721c502b2ddaa4e324e86da4997edf738fa5 (patch)
tree	350aa83b47da0b574a814795392b20b0bed83cbc /drivers/hid/hid-steam.c
download	linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.tar.gz linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.zip