[v5,1/5] HID: joycon: add nintendo switch controller driver
diff mbox series

Message ID 20190603060644.10338-2-djogorchock@gmail.com
State New
Headers show
Series
  • HID: joycon
Related show

Commit Message

Daniel J. Ogorchock June 3, 2019, 6:06 a.m. UTC
The joycon driver supports the Nintendo Switch Pro Controllers and the
Joy-Cons. The Pro Controllers can be used over USB or Bluetooth.

The Joy-Cons each create their own, independent input devices, so it is
up to userspace to combine them if desired.

Signed-off-by: Daniel J. Ogorchock <djogorchock@gmail.com>
---
 MAINTAINERS              |   6 +
 drivers/hid/Kconfig      |  11 +
 drivers/hid/Makefile     |   1 +
 drivers/hid/hid-ids.h    |   3 +
 drivers/hid/hid-joycon.c | 789 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 810 insertions(+)
 create mode 100644 drivers/hid/hid-joycon.c

Patch
diff mbox series

diff --git a/MAINTAINERS b/MAINTAINERS
index 2c2fce72e694..3d4789e5d720 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8331,6 +8331,12 @@  S:	Maintained
 F:	fs/jbd2/
 F:	include/linux/jbd2.h
 
+JOYCON HID DRIVER
+M:	Daniel J. Ogorchock <djogorchock@gmail.com>
+L:	linux-input@vger.kernel.org
+S:	Maintained
+F:	drivers/hid/hid-joycon*
+
 JPU V4L2 MEM2MEM DRIVER FOR RENESAS
 M:	Mikhail Ulyanov <mikhail.ulyanov@cogentembedded.com>
 L:	linux-media@vger.kernel.org
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 4ca0cdfa6b33..6f89edd89c55 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -452,6 +452,17 @@  config HID_JABRA
 	mouse button events.
 	Say M here if you may ever plug in a Jabra USB device.
 
+config HID_JOYCON
+	tristate "Nintendo Joy-Con and Pro Controller support"
+	depends on HID
+	help
+	Adds support for the Nintendo Switch Joy-Cons and Pro Controller.
+	All controllers support bluetooth, and the Pro Controller also supports
+	its USB mode.
+
+	To compile this driver as a module, choose M here: the
+	module will be called hid-joycon.
+
 config HID_TWINHAN
 	tristate "Twinhan IR remote control"
 	depends on HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 170163b41303..8379d5287d9c 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -57,6 +57,7 @@  obj-$(CONFIG_HID_HYPERV_MOUSE)	+= hid-hyperv.o
 obj-$(CONFIG_HID_ICADE)		+= hid-icade.o
 obj-$(CONFIG_HID_ITE)		+= hid-ite.o
 obj-$(CONFIG_HID_JABRA)		+= hid-jabra.o
+obj-$(CONFIG_HID_JOYCON)	+= hid-joycon.o
 obj-$(CONFIG_HID_KENSINGTON)	+= hid-kensington.o
 obj-$(CONFIG_HID_KEYTOUCH)	+= hid-keytouch.o
 obj-$(CONFIG_HID_KYE)		+= hid-kye.o
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index adce58f24f76..a1c262b34c64 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -856,6 +856,9 @@ 
 #define USB_VENDOR_ID_NINTENDO		0x057e
 #define USB_DEVICE_ID_NINTENDO_WIIMOTE	0x0306
 #define USB_DEVICE_ID_NINTENDO_WIIMOTE2	0x0330
+#define USB_DEVICE_ID_NINTENDO_JOYCONL	0x2006
+#define USB_DEVICE_ID_NINTENDO_JOYCONR  0x2007
+#define USB_DEVICE_ID_NINTENDO_PROCON   0x2009
 
 #define USB_VENDOR_ID_NOVATEK		0x0603
 #define USB_DEVICE_ID_NOVATEK_PCT	0x0600
diff --git a/drivers/hid/hid-joycon.c b/drivers/hid/hid-joycon.c
new file mode 100644
index 000000000000..d40e5da0e771
--- /dev/null
+++ b/drivers/hid/hid-joycon.c
@@ -0,0 +1,789 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * HID driver for Nintendo Switch Joy-Cons and Pro Controllers
+ *
+ * Copyright (c) 2019 Daniel J. Ogorchock <djogorchock@gmail.com>
+ *
+ * The following resources/projects were referenced for this driver:
+ *   https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
+ *   https://gitlab.com/pjranki/joycon-linux-kernel (Peter Rankin)
+ *   https://github.com/FrotBot/SwitchProConLinuxUSB
+ *   https://github.com/MTCKC/ProconXInput
+ *   hid-wiimote kernel hid driver
+ *   hid-logitech-hidpp driver
+ *
+ * This driver supports the Nintendo Switch Joy-Cons and Pro Controllers. The
+ * Pro Controllers can either be used over USB or Bluetooth.
+ *
+ * The driver will retrieve the factory calibration info from the controllers,
+ * so little to no user calibration should be required.
+ *
+ */
+
+#include "hid-ids.h"
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/hid.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+
+/*
+ * Reference the url below for the following HID report defines:
+ * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
+ */
+
+/* Output Reports */
+#define JC_OUTPUT_RUMBLE_AND_SUBCMD	0x01
+#define JC_OUTPUT_FW_UPDATE_PKT		0x03
+#define JC_OUTPUT_RUMBLE_ONLY		0x10
+#define JC_OUTPUT_MCU_DATA		0x11
+#define JC_OUTPUT_USB_CMD		0x80
+
+/* Subcommand IDs */
+#define JC_SUBCMD_STATE			0x00
+#define JC_SUBCMD_MANUAL_BT_PAIRING	0x01
+#define JC_SUBCMD_REQ_DEV_INFO		0x02
+#define JC_SUBCMD_SET_REPORT_MODE	0x03
+#define JC_SUBCMD_TRIGGERS_ELAPSED	0x04
+#define JC_SUBCMD_GET_PAGE_LIST_STATE	0x05
+#define JC_SUBCMD_SET_HCI_STATE		0x06
+#define JC_SUBCMD_RESET_PAIRING_INFO	0x07
+#define JC_SUBCMD_LOW_POWER_MODE	0x08
+#define JC_SUBCMD_SPI_FLASH_READ	0x10
+#define JC_SUBCMD_SPI_FLASH_WRITE	0x11
+#define JC_SUBCMD_RESET_MCU		0x20
+#define JC_SUBCMD_SET_MCU_CONFIG	0x21
+#define JC_SUBCMD_SET_MCU_STATE		0x22
+#define JC_SUBCMD_SET_PLAYER_LIGHTS	0x30
+#define JC_SUBCMD_GET_PLAYER_LIGHTS	0x31
+#define JC_SUBCMD_SET_HOME_LIGHT	0x38
+#define JC_SUBCMD_ENABLE_IMU		0x40
+#define JC_SUBCMD_SET_IMU_SENSITIVITY	0x41
+#define JC_SUBCMD_WRITE_IMU_REG		0x42
+#define JC_SUBCMD_READ_IMU_REG		0x43
+#define JC_SUBCMD_ENABLE_VIBRATION	0x48
+#define JC_SUBCMD_GET_REGULATED_VOLTAGE	0x50
+
+/* Input Reports */
+#define JC_INPUT_BUTTON_EVENT		0x3F
+#define JC_INPUT_SUBCMD_REPLY		0x21
+#define JC_INPUT_IMU_DATA		0x30
+#define JC_INPUT_MCU_DATA		0x31
+#define JC_INPUT_USB_RESPONSE		0x81
+
+/* Feature Reports */
+#define JC_FEATURE_LAST_SUBCMD		0x02
+#define JC_FEATURE_OTA_FW_UPGRADE	0x70
+#define JC_FEATURE_SETUP_MEM_READ	0x71
+#define JC_FEATURE_MEM_READ		0x72
+#define JC_FEATURE_ERASE_MEM_SECTOR	0x73
+#define JC_FEATURE_MEM_WRITE		0x74
+#define JC_FEATURE_LAUNCH		0x75
+
+/* USB Commands */
+#define JC_USB_CMD_CONN_STATUS		0x01
+#define JC_USB_CMD_HANDSHAKE		0x02
+#define JC_USB_CMD_BAUDRATE_3M		0x03
+#define JC_USB_CMD_NO_TIMEOUT		0x04
+#define JC_USB_CMD_EN_TIMEOUT		0x05
+#define JC_USB_RESET			0x06
+#define JC_USB_PRE_HANDSHAKE		0x91
+#define JC_USB_SEND_UART		0x92
+
+/* SPI storage addresses of factory calibration data */
+#define JC_CAL_DATA_START		0x603d
+#define JC_CAL_DATA_END			0x604e
+#define JC_CAL_DATA_SIZE	(JC_CAL_DATA_END - JC_CAL_DATA_START + 1)
+
+
+/* The raw analog joystick values will be mapped in terms of this magnitude */
+#define JC_MAX_STICK_MAG	32767
+#define JC_STICK_FUZZ		250
+#define JC_STICK_FLAT		500
+
+/* States for controller state machine */
+enum joycon_ctlr_state {
+	JOYCON_CTLR_STATE_INIT,
+	JOYCON_CTLR_STATE_READ,
+};
+
+struct joycon_stick_cal {
+	s32 max;
+	s32 min;
+	s32 center;
+};
+
+/*
+ * All the controller's button values are stored in a u32.
+ * They can be accessed with bitwise ANDs.
+ */
+#define JC_BTN_Y	BIT(0)
+#define JC_BTN_X	BIT(1)
+#define JC_BTN_B	BIT(2)
+#define JC_BTN_A	BIT(3)
+#define JC_BTN_SR_R	BIT(4)
+#define JC_BTN_SL_R	BIT(5)
+#define JC_BTN_R	BIT(6)
+#define JC_BTN_ZR	BIT(7)
+#define JC_BTN_MINUS	BIT(8)
+#define JC_BTN_PLUS	BIT(9)
+#define JC_BTN_RSTICK	BIT(10)
+#define JC_BTN_LSTICK	BIT(11)
+#define JC_BTN_HOME	BIT(12)
+#define JC_BTN_CAP	BIT(13) /* capture button */
+#define JC_BTN_DOWN	BIT(16)
+#define JC_BTN_UP	BIT(17)
+#define JC_BTN_RIGHT	BIT(18)
+#define JC_BTN_LEFT	BIT(19)
+#define JC_BTN_SR_L	BIT(20)
+#define JC_BTN_SL_L	BIT(21)
+#define JC_BTN_L	BIT(22)
+#define JC_BTN_ZL	BIT(23)
+
+enum joycon_msg_type {
+	JOYCON_MSG_TYPE_NONE,
+	JOYCON_MSG_TYPE_USB,
+	JOYCON_MSG_TYPE_SUBCMD,
+};
+
+struct joycon_subcmd_request {
+	u8 output_id; /* must be 0x01 for subcommand, 0x10 for rumble only */
+	u8 packet_num; /* incremented every send */
+	u8 rumble_data[8];
+	u8 subcmd_id;
+	u8 data[0]; /* length depends on the subcommand */
+} __packed;
+
+struct joycon_subcmd_reply {
+	u8 ack; /* MSB 1 for ACK, 0 for NACK */
+	u8 id; /* id of requested subcmd */
+	u8 data[0]; /* will be at most 35 bytes */
+} __packed;
+
+struct joycon_input_report {
+	u8 id;
+	u8 timer;
+	u8 bat_con; /* battery and connection info */
+	u8 button_status[3];
+	u8 left_stick[3];
+	u8 right_stick[3];
+	u8 vibrator_report;
+
+	/*
+	 * If support for firmware updates, gyroscope data, and/or NFC/IR
+	 * are added in the future, this can be swapped for a union.
+	 */
+	struct joycon_subcmd_reply reply;
+} __packed;
+
+#define JC_MAX_RESP_SIZE (sizeof(struct joycon_input_report) + 35)
+
+/* Each physical controller is associated with a joycon_ctlr struct */
+struct joycon_ctlr {
+	struct hid_device *hdev;
+	struct input_dev *input;
+	enum joycon_ctlr_state ctlr_state;
+
+	/* The following members are used for synchronous sends/receives */
+	enum joycon_msg_type msg_type;
+	u8 subcmd_num;
+	struct mutex output_mutex;
+	u8 input_buf[JC_MAX_RESP_SIZE];
+	wait_queue_head_t wait;
+	bool received_resp;
+	u8 usb_ack_match;
+	u8 subcmd_ack_match;
+
+	/* factory calibration data */
+	struct joycon_stick_cal left_stick_cal_x;
+	struct joycon_stick_cal left_stick_cal_y;
+	struct joycon_stick_cal right_stick_cal_x;
+	struct joycon_stick_cal right_stick_cal_y;
+
+};
+
+static int __joycon_hid_send(struct hid_device *hdev, u8 *data, size_t len)
+{
+	u8 *buf;
+	int ret;
+
+	buf = kmemdup(data, len, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+	ret = hid_hw_output_report(hdev, buf, len);
+	kfree(buf);
+	if (ret < 0)
+		hid_dbg(hdev, "Failed to send output report ret=%d\n", ret);
+	return ret;
+}
+
+static int joycon_hid_send_sync(struct joycon_ctlr *ctlr, u8 *data, size_t len)
+{
+	int ret;
+
+	ret = __joycon_hid_send(ctlr->hdev, data, len);
+	if (ret < 0) {
+		memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
+		return ret;
+	}
+
+	if (!wait_event_timeout(ctlr->wait, ctlr->received_resp, HZ)) {
+		hid_dbg(ctlr->hdev, "syncronous send/receive timed out\n");
+		memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
+		return -ETIMEDOUT;
+	}
+
+	ctlr->received_resp = false;
+	return 0;
+}
+
+static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd)
+{
+	int ret;
+	u8 buf[2] = {JC_OUTPUT_USB_CMD};
+
+	buf[1] = cmd;
+	ctlr->usb_ack_match = cmd;
+	ctlr->msg_type = JOYCON_MSG_TYPE_USB;
+	ret = joycon_hid_send_sync(ctlr, buf, sizeof(buf));
+	if (ret)
+		hid_dbg(ctlr->hdev, "send usb command failed; ret=%d\n", ret);
+	return ret;
+}
+
+static int joycon_send_subcmd(struct joycon_ctlr *ctlr,
+			      struct joycon_subcmd_request *subcmd,
+			      size_t data_len)
+{
+	int ret;
+
+	subcmd->output_id = JC_OUTPUT_RUMBLE_AND_SUBCMD;
+	subcmd->packet_num = ctlr->subcmd_num;
+	if (++ctlr->subcmd_num > 0xF)
+		ctlr->subcmd_num = 0;
+	ctlr->subcmd_ack_match = subcmd->subcmd_id;
+	ctlr->msg_type = JOYCON_MSG_TYPE_SUBCMD;
+
+	ret = joycon_hid_send_sync(ctlr, (u8 *)subcmd,
+				      sizeof(*subcmd) + data_len);
+	if (ret)
+		hid_dbg(ctlr->hdev, "send subcommand failed; ret=%d\n", ret);
+	return ret;
+}
+
+/* Supply nibbles for flash and on. Ones correspond to active */
+static int joycon_set_player_leds(struct joycon_ctlr *ctlr, u8 flash, u8 on)
+{
+	struct joycon_subcmd_request *req;
+	u8 buffer[sizeof(*req) + 1] = { 0 };
+
+	req = (struct joycon_subcmd_request *)buffer;
+	req->subcmd_id = JC_SUBCMD_SET_PLAYER_LIGHTS;
+	req->data[0] = (flash << 4) | on;
+
+	hid_dbg(ctlr->hdev, "setting player leds\n");
+	return joycon_send_subcmd(ctlr, req, 1);
+}
+
+static int joycon_request_calibration(struct joycon_ctlr *ctlr)
+{
+	struct joycon_subcmd_request *req;
+	u8 buffer[sizeof(*req) + 5] = { 0 };
+	struct joycon_input_report *report;
+	struct joycon_stick_cal *cal_x;
+	struct joycon_stick_cal *cal_y;
+	s32 x_max_above;
+	s32 x_min_below;
+	s32 y_max_above;
+	s32 y_min_below;
+	u8 *data;
+	u8 *raw_cal;
+	int ret;
+
+	req = (struct joycon_subcmd_request *)buffer;
+	req->subcmd_id = JC_SUBCMD_SPI_FLASH_READ;
+	data = req->data;
+	data[0] = 0xFF & JC_CAL_DATA_START;
+	data[1] = 0xFF & (JC_CAL_DATA_START >> 8);
+	data[2] = 0xFF & (JC_CAL_DATA_START >> 16);
+	data[3] = 0xFF & (JC_CAL_DATA_START >> 24);
+	data[4] = JC_CAL_DATA_SIZE;
+
+	hid_dbg(ctlr->hdev, "requesting cal data\n");
+	ret = joycon_send_subcmd(ctlr, req, 5);
+	if (ret)
+		return ret;
+
+	report = (struct joycon_input_report *)ctlr->input_buf;
+	raw_cal = &report->reply.data[5];
+
+	/* left stick calibration parsing */
+	cal_x = &ctlr->left_stick_cal_x;
+	cal_y = &ctlr->left_stick_cal_y;
+
+	x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0, 12);
+	y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4, 12);
+	cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0, 12);
+	cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4, 12);
+	x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0, 12);
+	y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4, 12);
+	cal_x->max = cal_x->center + x_max_above;
+	cal_x->min = cal_x->center - x_min_below;
+	cal_y->max = cal_y->center + y_max_above;
+	cal_y->min = cal_y->center - y_min_below;
+
+	/* right stick calibration parsing */
+	raw_cal += 9;
+	cal_x = &ctlr->right_stick_cal_x;
+	cal_y = &ctlr->right_stick_cal_y;
+
+	cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0, 12);
+	cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4, 12);
+	x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0, 12);
+	y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4, 12);
+	x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0, 12);
+	y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4, 12);
+	cal_x->max = cal_x->center + x_max_above;
+	cal_x->min = cal_x->center - x_min_below;
+	cal_y->max = cal_y->center + y_max_above;
+	cal_y->min = cal_y->center - y_min_below;
+
+	hid_dbg(ctlr->hdev, "calibration:\n"
+			    "l_x_c=%d l_x_max=%d l_x_min=%d\n"
+			    "l_y_c=%d l_y_max=%d l_y_min=%d\n"
+			    "r_x_c=%d r_x_max=%d r_x_min=%d\n"
+			    "r_y_c=%d r_y_max=%d r_y_min=%d\n",
+			    ctlr->left_stick_cal_x.center,
+			    ctlr->left_stick_cal_x.max,
+			    ctlr->left_stick_cal_x.min,
+			    ctlr->left_stick_cal_y.center,
+			    ctlr->left_stick_cal_y.max,
+			    ctlr->left_stick_cal_y.min,
+			    ctlr->right_stick_cal_x.center,
+			    ctlr->right_stick_cal_x.max,
+			    ctlr->right_stick_cal_x.min,
+			    ctlr->right_stick_cal_y.center,
+			    ctlr->right_stick_cal_y.max,
+			    ctlr->right_stick_cal_y.min);
+
+	return 0;
+}
+
+static int joycon_set_report_mode(struct joycon_ctlr *ctlr)
+{
+	struct joycon_subcmd_request *req;
+	u8 buffer[sizeof(*req) + 1] = { 0 };
+
+	req = (struct joycon_subcmd_request *)buffer;
+	req->subcmd_id = JC_SUBCMD_SET_REPORT_MODE;
+	req->data[0] = 0x30; /* standard, full report mode */
+
+	hid_dbg(ctlr->hdev, "setting controller report mode\n");
+	return joycon_send_subcmd(ctlr, req, 1);
+}
+
+static int joycon_map_stick_val(struct joycon_stick_cal *cal, s32 val)
+{
+	s32 center = cal->center;
+	s32 min = cal->min;
+	s32 max = cal->max;
+	int new_val;
+
+	if (val > center) {
+		new_val = (val - center) * JC_MAX_STICK_MAG;
+		new_val /= (max - center);
+	} else {
+		new_val = (center - val) * -JC_MAX_STICK_MAG;
+		new_val /= (center - min);
+	}
+	new_val = clamp(new_val, -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG);
+	return new_val;
+}
+
+static void joycon_parse_report(struct joycon_ctlr *ctlr, u8 *data)
+{
+	struct input_dev *dev = ctlr->input;
+	u32 btns;
+	u32 id = ctlr->hdev->product;
+
+	btns = hid_field_extract(ctlr->hdev, data + 3, 0, 24);
+
+	if (id != USB_DEVICE_ID_NINTENDO_JOYCONR) {
+		u16 raw_x;
+		u16 raw_y;
+		int x;
+		int y;
+
+		/* get raw stick values */
+		raw_x = hid_field_extract(ctlr->hdev, (data + 6), 0, 12);
+		raw_y = hid_field_extract(ctlr->hdev, (data + 7), 4, 12);
+		/* map the stick values */
+		x = joycon_map_stick_val(&ctlr->left_stick_cal_x, raw_x);
+		y = -joycon_map_stick_val(&ctlr->left_stick_cal_y, raw_y);
+		/* report sticks */
+		input_report_abs(dev, ABS_X, x);
+		input_report_abs(dev, ABS_Y, y);
+
+		/* report buttons */
+		input_report_key(dev, BTN_TL, btns & JC_BTN_L);
+		input_report_key(dev, BTN_TL2, btns & JC_BTN_ZL);
+		if (id != USB_DEVICE_ID_NINTENDO_PROCON) {
+			/* Report the S buttons as the non-existent triggers */
+			input_report_key(dev, BTN_TR, btns & JC_BTN_SL_L);
+			input_report_key(dev, BTN_TR2, btns & JC_BTN_SR_L);
+		}
+		input_report_key(dev, BTN_SELECT, btns & JC_BTN_MINUS);
+		input_report_key(dev, BTN_THUMBL, btns & JC_BTN_LSTICK);
+		input_report_key(dev, BTN_Z, btns & JC_BTN_CAP);
+		input_report_key(dev, BTN_DPAD_DOWN, btns & JC_BTN_DOWN);
+		input_report_key(dev, BTN_DPAD_UP, btns & JC_BTN_UP);
+		input_report_key(dev, BTN_DPAD_RIGHT, btns & JC_BTN_RIGHT);
+		input_report_key(dev, BTN_DPAD_LEFT, btns & JC_BTN_LEFT);
+	}
+	if (id != USB_DEVICE_ID_NINTENDO_JOYCONL) {
+		u16 raw_x;
+		u16 raw_y;
+		int x;
+		int y;
+
+		/* get raw stick values */
+		raw_x = hid_field_extract(ctlr->hdev, (data + 9), 0, 12);
+		raw_y = hid_field_extract(ctlr->hdev, (data + 10), 4, 12);
+		/* map stick values */
+		x = joycon_map_stick_val(&ctlr->right_stick_cal_x, raw_x);
+		y = -joycon_map_stick_val(&ctlr->right_stick_cal_y, raw_y);
+		/* report sticks */
+		input_report_abs(dev, ABS_RX, x);
+		input_report_abs(dev, ABS_RY, y);
+
+		/* report buttons */
+		input_report_key(dev, BTN_TR, btns & JC_BTN_R);
+		input_report_key(dev, BTN_TR2, btns & JC_BTN_ZR);
+		if (id != USB_DEVICE_ID_NINTENDO_PROCON) {
+			/* Report the S buttons as the non-existent triggers */
+			input_report_key(dev, BTN_TL, btns & JC_BTN_SL_R);
+			input_report_key(dev, BTN_TL2, btns & JC_BTN_SR_R);
+		}
+		input_report_key(dev, BTN_TR2, btns & JC_BTN_ZR);
+		input_report_key(dev, BTN_START, btns & JC_BTN_PLUS);
+		input_report_key(dev, BTN_THUMBR, btns & JC_BTN_RSTICK);
+		input_report_key(dev, BTN_MODE, btns & JC_BTN_HOME);
+		input_report_key(dev, BTN_WEST, btns & JC_BTN_Y);
+		input_report_key(dev, BTN_NORTH, btns & JC_BTN_X);
+		input_report_key(dev, BTN_EAST, btns & JC_BTN_A);
+		input_report_key(dev, BTN_SOUTH, btns & JC_BTN_B);
+	}
+
+	input_sync(dev);
+}
+
+
+static const unsigned int joycon_button_inputs[] = {
+	BTN_SELECT, BTN_Z, BTN_THUMBL,
+	BTN_START, BTN_MODE, BTN_THUMBR,
+	BTN_SOUTH, BTN_EAST, BTN_NORTH, BTN_WEST,
+	BTN_DPAD_UP, BTN_DPAD_DOWN, BTN_DPAD_LEFT, BTN_DPAD_RIGHT,
+	BTN_TL, BTN_TR, BTN_TL2, BTN_TR2,
+	0 /* 0 signals end of array */
+};
+
+static DEFINE_MUTEX(joycon_input_num_mutex);
+static int joycon_input_create(struct joycon_ctlr *ctlr)
+{
+	struct hid_device *hdev;
+	static int input_num = 1;
+	const char *name;
+	int ret;
+	int i;
+
+	hdev = ctlr->hdev;
+
+	switch (hdev->product) {
+	case USB_DEVICE_ID_NINTENDO_PROCON:
+		name = "Nintendo Switch Pro Controller";
+		break;
+	case USB_DEVICE_ID_NINTENDO_JOYCONL:
+		name = "Nintendo Switch Left Joy-Con";
+		break;
+	case USB_DEVICE_ID_NINTENDO_JOYCONR:
+		name = "Nintendo Switch Right Joy-Con";
+		break;
+	default: /* Should be impossible */
+		hid_err(hdev, "Invalid hid product\n");
+		ret = -EINVAL;
+		goto err;
+	}
+
+	ctlr->input = input_allocate_device();
+	if (!ctlr->input) {
+		ret = -ENOMEM;
+		goto err;
+	}
+	ctlr->input->dev.parent = &hdev->dev;
+	ctlr->input->id.bustype = hdev->bus;
+	ctlr->input->id.vendor = hdev->vendor;
+	ctlr->input->id.product = hdev->product;
+	ctlr->input->id.version = hdev->version;
+	ctlr->input->name = name;
+	input_set_drvdata(ctlr->input, ctlr);
+
+
+	/* set up sticks */
+	input_set_abs_params(ctlr->input, ABS_X,
+			     -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
+			     JC_STICK_FUZZ, JC_STICK_FLAT);
+	input_set_abs_params(ctlr->input, ABS_Y,
+			     -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
+			     JC_STICK_FUZZ, JC_STICK_FLAT);
+	input_set_abs_params(ctlr->input, ABS_RX,
+			     -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
+			     JC_STICK_FUZZ, JC_STICK_FLAT);
+	input_set_abs_params(ctlr->input, ABS_RY,
+			     -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
+			     JC_STICK_FUZZ, JC_STICK_FLAT);
+	/* set up buttons */
+	for (i = 0; joycon_button_inputs[i] > 0; i++)
+		input_set_capability(ctlr->input, EV_KEY,
+				     joycon_button_inputs[i]);
+
+	ret = input_register_device(ctlr->input);
+	if (ret)
+		goto err_input;
+
+	/* Set the default controller player leds based on controller number */
+	mutex_lock(&joycon_input_num_mutex);
+	mutex_lock(&ctlr->output_mutex);
+	ret = joycon_set_player_leds(ctlr, 0, 0xF >> (4 - input_num));
+	if (ret)
+		hid_warn(ctlr->hdev, "Failed to set leds; ret=%d\n", ret);
+	mutex_unlock(&ctlr->output_mutex);
+	if (++input_num > 4)
+		input_num = 1;
+	mutex_unlock(&joycon_input_num_mutex);
+
+	return 0;
+
+err_input:
+	input_free_device(ctlr->input);
+err:
+	return ret;
+}
+
+/* Common handler for parsing inputs */
+static int joycon_ctlr_read_handler(struct joycon_ctlr *ctlr, u8 *data,
+							      int size)
+{
+	int ret = 0;
+
+	switch (data[0]) {
+	case JC_INPUT_SUBCMD_REPLY:
+	case JC_INPUT_IMU_DATA:
+	case JC_INPUT_MCU_DATA:
+		if (size >= 12) /* make sure it contains the input report */
+			joycon_parse_report(ctlr, data);
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+static int joycon_ctlr_handle_event(struct joycon_ctlr *ctlr, u8 *data,
+							      int size)
+{
+	int ret = 0;
+	bool match = false;
+	struct joycon_input_report *report;
+
+	if (unlikely(mutex_is_locked(&ctlr->output_mutex)) &&
+	    ctlr->msg_type != JOYCON_MSG_TYPE_NONE) {
+		switch (ctlr->msg_type) {
+		case JOYCON_MSG_TYPE_USB:
+			if (size < 2)
+				break;
+			if (data[0] == JC_INPUT_USB_RESPONSE &&
+			    data[1] == ctlr->usb_ack_match)
+				match = true;
+			break;
+		case JOYCON_MSG_TYPE_SUBCMD:
+			if (size < sizeof(struct joycon_input_report) ||
+			    data[0] != JC_INPUT_SUBCMD_REPLY)
+				break;
+			report = (struct joycon_input_report *)data;
+			if (report->reply.id == ctlr->subcmd_ack_match)
+				match = true;
+			break;
+		default:
+			break;
+		}
+
+		if (match) {
+			memcpy(ctlr->input_buf, data,
+			       min(size, (int)JC_MAX_RESP_SIZE));
+			ctlr->msg_type = JOYCON_MSG_TYPE_NONE;
+			ctlr->received_resp = true;
+			wake_up(&ctlr->wait);
+
+			/* This message has been handled */
+			return 1;
+		}
+	}
+
+	if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ)
+		ret = joycon_ctlr_read_handler(ctlr, data, size);
+
+	return ret;
+}
+
+static int joycon_hid_event(struct hid_device *hdev,
+			    struct hid_report *report, u8 *raw_data, int size)
+{
+	struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
+
+	if (size < 1)
+		return -EINVAL;
+
+	return joycon_ctlr_handle_event(ctlr, raw_data, size);
+}
+
+static void joycon_ctlr_destroy(struct joycon_ctlr *ctlr)
+{
+	if (ctlr->input)
+		input_unregister_device(ctlr->input);
+	mutex_destroy(&ctlr->output_mutex);
+}
+
+static int joycon_hid_probe(struct hid_device *hdev,
+			    const struct hid_device_id *id)
+{
+	int ret;
+	struct joycon_ctlr *ctlr;
+
+	hid_dbg(hdev, "probe - start\n");
+
+	ctlr = devm_kzalloc(&hdev->dev, sizeof(*ctlr), GFP_KERNEL);
+	if (!ctlr) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	ctlr->hdev = hdev;
+	ctlr->ctlr_state = JOYCON_CTLR_STATE_INIT;
+	hid_set_drvdata(hdev, ctlr);
+	mutex_init(&ctlr->output_mutex);
+	init_waitqueue_head(&ctlr->wait);
+
+	ret = hid_parse(hdev);
+	if (ret) {
+		hid_err(hdev, "HID parse failed\n");
+		goto err;
+	}
+
+	ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+	if (ret) {
+		hid_err(hdev, "HW start failed\n");
+		goto err;
+	}
+
+	ret = hid_hw_open(hdev);
+	if (ret) {
+		hid_err(hdev, "cannot start hardware I/O\n");
+		goto err_stop;
+	}
+
+	hid_device_io_start(hdev);
+
+	/* Initialize the controller */
+	mutex_lock(&ctlr->output_mutex);
+	/* if baudrate command fails, assume ble pro controller */
+	if (hdev->product == USB_DEVICE_ID_NINTENDO_PROCON &&
+	    !joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M)) {
+		/* handshake */
+		ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE);
+		if (ret) {
+			hid_err(hdev, "Failed handshake; ret=%d\n", ret);
+			goto err_mutex;
+		}
+		/*
+		 * Set no timeout (to keep controller in USB mode).
+		 * This doesn't send a response, so ignore the timeout.
+		 */
+		joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT);
+	}
+
+	/* get controller calibration data, and parse it */
+	ret = joycon_request_calibration(ctlr);
+	if (ret) {
+		hid_err(hdev, "Failed to retrieve calibration; ret=%d\n", ret);
+		goto err_mutex;
+	}
+
+	/* Set the reporting mode to 0x30, which is the full report mode */
+	ret = joycon_set_report_mode(ctlr);
+	if (ret) {
+		hid_err(hdev, "Failed to set report mode; ret=%d\n", ret);
+		goto err_mutex;
+	}
+
+	mutex_unlock(&ctlr->output_mutex);
+
+	ret = joycon_input_create(ctlr);
+	if (ret) {
+		hid_err(hdev, "Failed to create input device; ret=%d\n", ret);
+		goto err_close;
+	}
+
+	ctlr->ctlr_state = JOYCON_CTLR_STATE_READ;
+
+	hid_dbg(hdev, "probe - success\n");
+	return 0;
+
+err_mutex:
+	mutex_unlock(&ctlr->output_mutex);
+err_close:
+	joycon_ctlr_destroy(ctlr);
+	hid_hw_close(hdev);
+err_stop:
+	hid_hw_stop(hdev);
+err:
+	hid_err(hdev, "probe - fail = %d\n", ret);
+	return ret;
+}
+
+static void joycon_hid_remove(struct hid_device *hdev)
+{
+	struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
+
+	hid_dbg(hdev, "remove\n");
+	hid_hw_close(hdev);
+	hid_hw_stop(hdev);
+	joycon_ctlr_destroy(ctlr);
+}
+
+static const struct hid_device_id joycon_hid_devices[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
+			 USB_DEVICE_ID_NINTENDO_PROCON) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
+			 USB_DEVICE_ID_NINTENDO_PROCON) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
+			 USB_DEVICE_ID_NINTENDO_JOYCONL) },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
+			 USB_DEVICE_ID_NINTENDO_JOYCONR) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, joycon_hid_devices);
+
+static struct hid_driver joycon_hid_driver = {
+	.name		= "joycon",
+	.id_table	= joycon_hid_devices,
+	.probe		= joycon_hid_probe,
+	.remove		= joycon_hid_remove,
+	.raw_event	= joycon_hid_event,
+};
+module_hid_driver(joycon_hid_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Daniel J. Ogorchock <djogorchock@gmail.com>");
+MODULE_DESCRIPTION("Driver for Nintendo Switch Controllers");