Merge branch 'for-5.16/nintendo' into for-linus

- support for Nintendo Switch Pro Controllers and Joy-Cons (Daniel J. Ogorchock)

4 files changed, 2348 insertions, 0 deletions

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index d78b1c1fb97e..7c7eef9b9136 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -731,6 +731,30 @@ config HID_MULTITOUCH
 	  To compile this driver as a module, choose M here: the
 	  module will be called hid-multitouch.
 
+config HID_NINTENDO
+	tristate "Nintendo Joy-Con and Pro Controller support"
+	depends on HID
+	depends on NEW_LEDS
+	depends on LEDS_CLASS
+	select POWER_SUPPLY
+	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-nintendo.
+
+config NINTENDO_FF
+	bool "Nintendo Switch controller force feedback support"
+	depends on HID_NINTENDO
+	select INPUT_FF_MEMLESS
+	help
+	Say Y here if you have a Nintendo Switch controller and want to enable
+	force feedback support for it. This works for both joy-cons and the pro
+	controller. For the pro controller, both rumble motors can be controlled
+	individually.
+
 config HID_NTI
 	tristate "NTI keyboard adapters"
 	help
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index e29efcb1c040..7a71371e3adf 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -78,6 +78,7 @@ obj-$(CONFIG_HID_MAYFLASH)	+= hid-mf.o
 obj-$(CONFIG_HID_MICROSOFT)	+= hid-microsoft.o
 obj-$(CONFIG_HID_MONTEREY)	+= hid-monterey.o
 obj-$(CONFIG_HID_MULTITOUCH)	+= hid-multitouch.o
+obj-$(CONFIG_HID_NINTENDO)	+= hid-nintendo.o
 obj-$(CONFIG_HID_NTI)			+= hid-nti.o
 obj-$(CONFIG_HID_NTRIG)		+= hid-ntrig.o
 obj-$(CONFIG_HID_ORTEK)		+= hid-ortek.o
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 12ab0f0f6fc5..43f0d0aabeb1 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -918,6 +918,10 @@
 #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_DEVICE_ID_NINTENDO_CHRGGRIP	0x200E
 
 #define USB_VENDOR_ID_NOVATEK		0x0603
 #define USB_DEVICE_ID_NOVATEK_PCT	0x0600
diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c
new file mode 100644
index 000000000000..a1e0f6849875
--- /dev/null
+++ b/drivers/hid/hid-nintendo.c
@@ -0,0 +1,2319 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * HID driver for Nintendo Switch Joy-Cons and Pro Controllers
+ *
+ * Copyright (c) 2019-2021 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
+ *   https://github.com/Davidobot/BetterJoyForCemu
+ *   hid-wiimote kernel hid driver
+ *   hid-logitech-hidpp driver
+ *   hid-sony 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 <asm/unaligned.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/hid.h>
+#include <linux/input.h>
+#include <linux/jiffies.h>
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/power_supply.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
+
+/* Magic value denoting presence of user calibration */
+#define JC_CAL_USR_MAGIC_0		 0xB2
+#define JC_CAL_USR_MAGIC_1		 0xA1
+#define JC_CAL_USR_MAGIC_SIZE		 2
+
+/* SPI storage addresses of user calibration data */
+#define JC_CAL_USR_LEFT_MAGIC_ADDR	 0x8010
+#define JC_CAL_USR_LEFT_DATA_ADDR	 0x8012
+#define JC_CAL_USR_LEFT_DATA_END	 0x801A
+#define JC_CAL_USR_RIGHT_MAGIC_ADDR	 0x801B
+#define JC_CAL_USR_RIGHT_DATA_ADDR	 0x801D
+#define JC_CAL_STICK_DATA_SIZE \
+	(JC_CAL_USR_LEFT_DATA_END - JC_CAL_USR_LEFT_DATA_ADDR + 1)
+
+/* SPI storage addresses of factory calibration data */
+#define JC_CAL_FCT_DATA_LEFT_ADDR	 0x603d
+#define JC_CAL_FCT_DATA_RIGHT_ADDR	 0x6046
+
+/* SPI storage addresses of IMU factory calibration data */
+#define JC_IMU_CAL_FCT_DATA_ADDR	 0x6020
+#define JC_IMU_CAL_FCT_DATA_END	 0x6037
+#define JC_IMU_CAL_DATA_SIZE \
+	(JC_IMU_CAL_FCT_DATA_END - JC_IMU_CAL_FCT_DATA_ADDR + 1)
+/* SPI storage addresses of IMU user calibration data */
+#define JC_IMU_CAL_USR_MAGIC_ADDR	 0x8026
+#define JC_IMU_CAL_USR_DATA_ADDR	 0x8028
+
+/* 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
+
+/* Hat values for pro controller's d-pad */
+#define JC_MAX_DPAD_MAG		1
+#define JC_DPAD_FUZZ		0
+#define JC_DPAD_FLAT		0
+
+/* Under most circumstances IMU reports are pushed every 15ms; use as default */
+#define JC_IMU_DFLT_AVG_DELTA_MS	15
+/* How many samples to sum before calculating average IMU report delta */
+#define JC_IMU_SAMPLES_PER_DELTA_AVG	300
+/* Controls how many dropped IMU packets at once trigger a warning message */
+#define JC_IMU_DROPPED_PKT_WARNING	3
+
+/*
+ * The controller's accelerometer has a sensor resolution of 16bits and is
+ * configured with a range of +-8000 milliGs. Therefore, the resolution can be
+ * calculated thus: (2^16-1)/(8000 * 2) = 4.096 digits per milliG
+ * Resolution per G (rather than per millliG): 4.096 * 1000 = 4096 digits per G
+ * Alternatively: 1/4096 = .0002441 Gs per digit
+ */
+#define JC_IMU_MAX_ACCEL_MAG		32767
+#define JC_IMU_ACCEL_RES_PER_G		4096
+#define JC_IMU_ACCEL_FUZZ		10
+#define JC_IMU_ACCEL_FLAT		0
+
+/*
+ * The controller's gyroscope has a sensor resolution of 16bits and is
+ * configured with a range of +-2000 degrees/second.
+ * Digits per dps: (2^16 -1)/(2000*2) = 16.38375
+ * dps per digit: 16.38375E-1 = .0610
+ *
+ * STMicro recommends in the datasheet to add 15% to the dps/digit. This allows
+ * the full sensitivity range to be saturated without clipping. This yields more
+ * accurate results, so it's the technique this driver uses.
+ * dps per digit (corrected): .0610 * 1.15 = .0702
+ * digits per dps (corrected): .0702E-1 = 14.247
+ *
+ * Now, 14.247 truncating to 14 loses a lot of precision, so we rescale the
+ * min/max range by 1000.
+ */
+#define JC_IMU_PREC_RANGE_SCALE	1000
+/* Note: change mag and res_per_dps if prec_range_scale is ever altered */
+#define JC_IMU_MAX_GYRO_MAG		32767000 /* (2^16-1)*1000 */
+#define JC_IMU_GYRO_RES_PER_DPS		14247 /* (14.247*1000) */
+#define JC_IMU_GYRO_FUZZ		10
+#define JC_IMU_GYRO_FLAT		0
+
+/* frequency/amplitude tables for rumble */
+struct joycon_rumble_freq_data {
+	u16 high;
+	u8 low;
+	u16 freq; /* Hz*/
+};
+
+struct joycon_rumble_amp_data {
+	u8 high;
+	u16 low;
+	u16 amp;
+};
+
+/*
+ * These tables are from
+ * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering/blob/master/rumble_data_table.md
+ */
+static const struct joycon_rumble_freq_data joycon_rumble_frequencies[] = {
+	/* high, low, freq */
+	{ 0x0000, 0x01,   41 }, { 0x0000, 0x02,   42 }, { 0x0000, 0x03,   43 },
+	{ 0x0000, 0x04,   44 }, { 0x0000, 0x05,   45 }, { 0x0000, 0x06,   46 },
+	{ 0x0000, 0x07,   47 }, { 0x0000, 0x08,   48 }, { 0x0000, 0x09,   49 },
+	{ 0x0000, 0x0A,   50 }, { 0x0000, 0x0B,   51 }, { 0x0000, 0x0C,   52 },
+	{ 0x0000, 0x0D,   53 }, { 0x0000, 0x0E,   54 }, { 0x0000, 0x0F,   55 },
+	{ 0x0000, 0x10,   57 }, { 0x0000, 0x11,   58 }, { 0x0000, 0x12,   59 },
+	{ 0x0000, 0x13,   60 }, { 0x0000, 0x14,   62 }, { 0x0000, 0x15,   63 },
+	{ 0x0000, 0x16,   64 }, { 0x0000, 0x17,   66 }, { 0x0000, 0x18,   67 },
+	{ 0x0000, 0x19,   69 }, { 0x0000, 0x1A,   70 }, { 0x0000, 0x1B,   72 },
+	{ 0x0000, 0x1C,   73 }, { 0x0000, 0x1D,   75 }, { 0x0000, 0x1e,   77 },
+	{ 0x0000, 0x1f,   78 }, { 0x0000, 0x20,   80 }, { 0x0400, 0x21,   82 },
+	{ 0x0800, 0x22,   84 }, { 0x0c00, 0x23,   85 }, { 0x1000, 0x24,   87 },
+	{ 0x1400, 0x25,   89 }, { 0x1800, 0x26,   91 }, { 0x1c00, 0x27,   93 },
+	{ 0x2000, 0x28,   95 }, { 0x2400, 0x29,   97 }, { 0x2800, 0x2a,   99 },
+	{ 0x2c00, 0x2b,  102 }, { 0x3000, 0x2c,  104 }, { 0x3400, 0x2d,  106 },
+	{ 0x3800, 0x2e,  108 }, { 0x3c00, 0x2f,  111 }, { 0x4000, 0x30,  113 },
+	{ 0x4400, 0x31,  116 }, { 0x4800, 0x32,  118 }, { 0x4c00, 0x33,  121 },
+	{ 0x5000, 0x34,  123 }, { 0x5400, 0x35,  126 }, { 0x5800, 0x36,  129 },
+	{ 0x5c00, 0x37,  132 }, { 0x6000, 0x38,  135 }, { 0x6400, 0x39,  137 },
+	{ 0x6800, 0x3a,  141 }, { 0x6c00, 0x3b,  144 }, { 0x7000, 0x3c,  147 },
+	{ 0x7400, 0x3d,  150 }, { 0x7800, 0x3e,  153 }, { 0x7c00, 0x3f,  157 },
+	{ 0x8000, 0x40,  160 }, { 0x8400, 0x41,  164 }, { 0x8800, 0x42,  167 },
+	{ 0x8c00, 0x43,  171 }, { 0x9000, 0x44,  174 }, { 0x9400, 0x45,  178 },
+	{ 0x9800, 0x46,  182 }, { 0x9c00, 0x47,  186 }, { 0xa000, 0x48,  190 },
+	{ 0xa400, 0x49,  194 }, { 0xa800, 0x4a,  199 }, { 0xac00, 0x4b,  203 },
+	{ 0xb000, 0x4c,  207 }, { 0xb400, 0x4d,  212 }, { 0xb800, 0x4e,  217 },
+	{ 0xbc00, 0x4f,  221 }, { 0xc000, 0x50,  226 }, { 0xc400, 0x51,  231 },
+	{ 0xc800, 0x52,  236 }, { 0xcc00, 0x53,  241 }, { 0xd000, 0x54,  247 },
+	{ 0xd400, 0x55,  252 }, { 0xd800, 0x56,  258 }, { 0xdc00, 0x57,  263 },
+	{ 0xe000, 0x58,  269 }, { 0xe400, 0x59,  275 }, { 0xe800, 0x5a,  281 },
+	{ 0xec00, 0x5b,  287 }, { 0xf000, 0x5c,  293 }, { 0xf400, 0x5d,  300 },
+	{ 0xf800, 0x5e,  306 }, { 0xfc00, 0x5f,  313 }, { 0x0001, 0x60,  320 },
+	{ 0x0401, 0x61,  327 }, { 0x0801, 0x62,  334 }, { 0x0c01, 0x63,  341 },
+	{ 0x1001, 0x64,  349 }, { 0x1401, 0x65,  357 }, { 0x1801, 0x66,  364 },
+	{ 0x1c01, 0x67,  372 }, { 0x2001, 0x68,  381 }, { 0x2401, 0x69,  389 },
+	{ 0x2801, 0x6a,  397 }, { 0x2c01, 0x6b,  406 }, { 0x3001, 0x6c,  415 },
+	{ 0x3401, 0x6d,  424 }, { 0x3801, 0x6e,  433 }, { 0x3c01, 0x6f,  443 },
+	{ 0x4001, 0x70,  453 }, { 0x4401, 0x71,  462 }, { 0x4801, 0x72,  473 },
+	{ 0x4c01, 0x73,  483 }, { 0x5001, 0x74,  494 }, { 0x5401, 0x75,  504 },
+	{ 0x5801, 0x76,  515 }, { 0x5c01, 0x77,  527 }, { 0x6001, 0x78,  538 },
+	{ 0x6401, 0x79,  550 }, { 0x6801, 0x7a,  562 }, { 0x6c01, 0x7b,  574 },
+	{ 0x7001, 0x7c,  587 }, { 0x7401, 0x7d,  600 }, { 0x7801, 0x7e,  613 },
+	{ 0x7c01, 0x7f,  626 }, { 0x8001, 0x00,  640 }, { 0x8401, 0x00,  654 },
+	{ 0x8801, 0x00,  668 }, { 0x8c01, 0x00,  683 }, { 0x9001, 0x00,  698 },
+	{ 0x9401, 0x00,  713 }, { 0x9801, 0x00,  729 }, { 0x9c01, 0x00,  745 },
+	{ 0xa001, 0x00,  761 }, { 0xa401, 0x00,  778 }, { 0xa801, 0x00,  795 },
+	{ 0xac01, 0x00,  812 }, { 0xb001, 0x00,  830 }, { 0xb401, 0x00,  848 },
+	{ 0xb801, 0x00,  867 }, { 0xbc01, 0x00,  886 }, { 0xc001, 0x00,  905 },
+	{ 0xc401, 0x00,  925 }, { 0xc801, 0x00,  945 }, { 0xcc01, 0x00,  966 },
+	{ 0xd001, 0x00,  987 }, { 0xd401, 0x00, 1009 }, { 0xd801, 0x00, 1031 },
+	{ 0xdc01, 0x00, 1053 }, { 0xe001, 0x00, 1076 }, { 0xe401, 0x00, 1100 },
+	{ 0xe801, 0x00, 1124 }, { 0xec01, 0x00, 1149 }, { 0xf001, 0x00, 1174 },
+	{ 0xf401, 0x00, 1199 }, { 0xf801, 0x00, 1226 }, { 0xfc01, 0x00, 1253 }
+};
+
+#define joycon_max_rumble_amp	(1003)
+static const struct joycon_rumble_amp_data joycon_rumble_amplitudes[] = {
+	/* high, low, amp */
+	{ 0x00, 0x0040,    0 },
+	{ 0x02, 0x8040,   10 }, { 0x04, 0x0041,   12 }, { 0x06, 0x8041,   14 },
+	{ 0x08, 0x0042,   17 }, { 0x0a, 0x8042,   20 }, { 0x0c, 0x0043,   24 },
+	{ 0x0e, 0x8043,   28 }, { 0x10, 0x0044,   33 }, { 0x12, 0x8044,   40 },
+	{ 0x14, 0x0045,   47 }, { 0x16, 0x8045,   56 }, { 0x18, 0x0046,   67 },
+	{ 0x1a, 0x8046,   80 }, { 0x1c, 0x0047,   95 }, { 0x1e, 0x8047,  112 },
+	{ 0x20, 0x0048,  117 }, { 0x22, 0x8048,  123 }, { 0x24, 0x0049,  128 },
+	{ 0x26, 0x8049,  134 }, { 0x28, 0x004a,  140 }, { 0x2a, 0x804a,  146 },
+	{ 0x2c, 0x004b,  152 }, { 0x2e, 0x804b,  159 }, { 0x30, 0x004c,  166 },
+	{ 0x32, 0x804c,  173 }, { 0x34, 0x004d,  181 }, { 0x36, 0x804d,  189 },
+	{ 0x38, 0x004e,  198 }, { 0x3a, 0x804e,  206 }, { 0x3c, 0x004f,  215 },
+	{ 0x3e, 0x804f,  225 }, { 0x40, 0x0050,  230 }, { 0x42, 0x8050,  235 },
+	{ 0x44, 0x0051,  240 }, { 0x46, 0x8051,  245 }, { 0x48, 0x0052,  251 },
+	{ 0x4a, 0x8052,  256 }, { 0x4c, 0x0053,  262 }, { 0x4e, 0x8053,  268 },
+	{ 0x50, 0x0054,  273 }, { 0x52, 0x8054,  279 }, { 0x54, 0x0055,  286 },
+	{ 0x56, 0x8055,  292 }, { 0x58, 0x0056,  298 }, { 0x5a, 0x8056,  305 },
+	{ 0x5c, 0x0057,  311 }, { 0x5e, 0x8057,  318 }, { 0x60, 0x0058,  325 },
+	{ 0x62, 0x8058,  332 }, { 0x64, 0x0059,  340 }, { 0x66, 0x8059,  347 },
+	{ 0x68, 0x005a,  355 }, { 0x6a, 0x805a,  362 }, { 0x6c, 0x005b,  370 },
+	{ 0x6e, 0x805b,  378 }, { 0x70, 0x005c,  387 }, { 0x72, 0x805c,  395 },
+	{ 0x74, 0x005d,  404 }, { 0x76, 0x805d,  413 }, { 0x78, 0x005e,  422 },
+	{ 0x7a, 0x805e,  431 }, { 0x7c, 0x005f,  440 }, { 0x7e, 0x805f,  450 },
+	{ 0x80, 0x0060,  460 }, { 0x82, 0x8060,  470 }, { 0x84, 0x0061,  480 },
+	{ 0x86, 0x8061,  491 }, { 0x88, 0x0062,  501 }, { 0x8a, 0x8062,  512 },
+	{ 0x8c, 0x0063,  524 }, { 0x8e, 0x8063,  535 }, { 0x90, 0x0064,  547 },
+	{ 0x92, 0x8064,  559 }, { 0x94, 0x0065,  571 }, { 0x96, 0x8065,  584 },
+	{ 0x98, 0x0066,  596 }, { 0x9a, 0x8066,  609 }, { 0x9c, 0x0067,  623 },
+	{ 0x9e, 0x8067,  636 }, { 0xa0, 0x0068,  650 }, { 0xa2, 0x8068,  665 },
+	{ 0xa4, 0x0069,  679 }, { 0xa6, 0x8069,  694 }, { 0xa8, 0x006a,  709 },
+	{ 0xaa, 0x806a,  725 }, { 0xac, 0x006b,  741 }, { 0xae, 0x806b,  757 },
+	{ 0xb0, 0x006c,  773 }, { 0xb2, 0x806c,  790 }, { 0xb4, 0x006d,  808 },
+	{ 0xb6, 0x806d,  825 }, { 0xb8, 0x006e,  843 }, { 0xba, 0x806e,  862 },
+	{ 0xbc, 0x006f,  881 }, { 0xbe, 0x806f,  900 }, { 0xc0, 0x0070,  920 },
+	{ 0xc2, 0x8070,  940 }, { 0xc4, 0x0071,  960 }, { 0xc6, 0x8071,  981 },
+	{ 0xc8, 0x0072, joycon_max_rumble_amp }
+};
+
+/* States for controller state machine */
+enum joycon_ctlr_state {
+	JOYCON_CTLR_STATE_INIT,
+	JOYCON_CTLR_STATE_READ,
+	JOYCON_CTLR_STATE_REMOVED,
+};
+
+/* Controller type received as part of device info */
+enum joycon_ctlr_type {
+	JOYCON_CTLR_TYPE_JCL = 0x01,
+	JOYCON_CTLR_TYPE_JCR = 0x02,
+	JOYCON_CTLR_TYPE_PRO = 0x03,
+};
+
+struct joycon_stick_cal {
+	s32 max;
+	s32 min;
+	s32 center;
+};
+
+struct joycon_imu_cal {
+	s16 offset[3];
+	s16 scale[3];
+};
+
+/*
+ * All the controller's button values are stored in a u32.
+ * They can be accessed with bitwise ANDs.
+ */
+static const u32 JC_BTN_Y	= BIT(0);
+static const u32 JC_BTN_X	= BIT(1);
+static const u32 JC_BTN_B	= BIT(2);
+static const u32 JC_BTN_A	= BIT(3);
+static const u32 JC_BTN_SR_R	= BIT(4);
+static const u32 JC_BTN_SL_R	= BIT(5);
+static const u32 JC_BTN_R	= BIT(6);
+static const u32 JC_BTN_ZR	= BIT(7);
+static const u32 JC_BTN_MINUS	= BIT(8);
+static const u32 JC_BTN_PLUS	= BIT(9);
+static const u32 JC_BTN_RSTICK	= BIT(10);
+static const u32 JC_BTN_LSTICK	= BIT(11);
+static const u32 JC_BTN_HOME	= BIT(12);
+static const u32 JC_BTN_CAP	= BIT(13); /* capture button */
+static const u32 JC_BTN_DOWN	= BIT(16);
+static const u32 JC_BTN_UP	= BIT(17);
+static const u32 JC_BTN_RIGHT	= BIT(18);
+static const u32 JC_BTN_LEFT	= BIT(19);
+static const u32 JC_BTN_SR_L	= BIT(20);
+static const u32 JC_BTN_SL_L	= BIT(21);
+static const u32 JC_BTN_L	= BIT(22);
+static const u32 JC_BTN_ZL	= BIT(23);
+
+enum joycon_msg_type {
+	JOYCON_MSG_TYPE_NONE,
+	JOYCON_MSG_TYPE_USB,
+	JOYCON_MSG_TYPE_SUBCMD,
+};
+
+struct joycon_rumble_output {
+	u8 output_id;
+	u8 packet_num;
+	u8 rumble_data[8];
+} __packed;
+
+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[]; /* 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[]; /* will be at most 35 bytes */
+} __packed;
+
+struct joycon_imu_data {
+	s16 accel_x;
+	s16 accel_y;
+	s16 accel_z;
+	s16 gyro_x;
+	s16 gyro_y;
+	s16 gyro_z;
+} __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;
+
+	union {
+		struct joycon_subcmd_reply subcmd_reply;
+		/* IMU input reports contain 3 samples */
+		u8 imu_raw_bytes[sizeof(struct joycon_imu_data) * 3];
+	};
+} __packed;
+
+#define JC_MAX_RESP_SIZE	(sizeof(struct joycon_input_report) + 35)
+#define JC_RUMBLE_DATA_SIZE	8
+#define JC_RUMBLE_QUEUE_SIZE	8
+
+static const u16 JC_RUMBLE_DFLT_LOW_FREQ = 160;
+static const u16 JC_RUMBLE_DFLT_HIGH_FREQ = 320;
+static const u16 JC_RUMBLE_PERIOD_MS = 50;
+static const unsigned short JC_RUMBLE_ZERO_AMP_PKT_CNT = 5;
+
+static const char * const joycon_player_led_names[] = {
+	LED_FUNCTION_PLAYER1,
+	LED_FUNCTION_PLAYER2,
+	LED_FUNCTION_PLAYER3,
+	LED_FUNCTION_PLAYER4,
+};
+#define JC_NUM_LEDS		ARRAY_SIZE(joycon_player_led_names)
+
+/* Each physical controller is associated with a joycon_ctlr struct */
+struct joycon_ctlr {
+	struct hid_device *hdev;
+	struct input_dev *input;
+	struct led_classdev leds[JC_NUM_LEDS]; /* player leds */
+	struct led_classdev home_led;
+	enum joycon_ctlr_state ctlr_state;
+	spinlock_t lock;
+	u8 mac_addr[6];
+	char *mac_addr_str;
+	enum joycon_ctlr_type ctlr_type;
+
+	/* 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;
+	bool received_input_report;
+	unsigned int last_subcmd_sent_msecs;
+
+	/* 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;
+
+	struct joycon_imu_cal accel_cal;
+	struct joycon_imu_cal gyro_cal;
+
+	/* prevents needlessly recalculating these divisors every sample */
+	s32 imu_cal_accel_divisor[3];
+	s32 imu_cal_gyro_divisor[3];
+
+	/* power supply data */
+	struct power_supply *battery;
+	struct power_supply_desc battery_desc;
+	u8 battery_capacity;
+	bool battery_charging;
+	bool host_powered;
+
+	/* rumble */
+	u8 rumble_data[JC_RUMBLE_QUEUE_SIZE][JC_RUMBLE_DATA_SIZE];
+	int rumble_queue_head;
+	int rumble_queue_tail;
+	struct workqueue_struct *rumble_queue;
+	struct work_struct rumble_worker;
+	unsigned int rumble_msecs;
+	u16 rumble_ll_freq;
+	u16 rumble_lh_freq;
+	u16 rumble_rl_freq;
+	u16 rumble_rh_freq;
+	unsigned short rumble_zero_countdown;
+
+	/* imu */
+	struct input_dev *imu_input;
+	bool imu_first_packet_received; /* helps in initiating timestamp */
+	unsigned int imu_timestamp_us; /* timestamp we report to userspace */
+	unsigned int imu_last_pkt_ms; /* used to calc imu report delta */
+	/* the following are used to track the average imu report time delta */
+	unsigned int imu_delta_samples_count;
+	unsigned int imu_delta_samples_sum;
+	unsigned int imu_avg_delta_ms;
+};
+
+/* Helper macros for checking controller type */
+#define jc_type_is_joycon(ctlr) \
+	(ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL || \
+	 ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR || \
+	 ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP)
+#define jc_type_is_procon(ctlr) \
+	(ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_PROCON)
+#define jc_type_is_chrggrip(ctlr) \
+	(ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP)
+
+/* Does this controller have inputs associated with left joycon? */
+#define jc_type_has_left(ctlr) \
+	(ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCL || \
+	 ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO)
+
+/* Does this controller have inputs associated with right joycon? */
+#define jc_type_has_right(ctlr) \
+	(ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCR || \
+	 ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO)
+
+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 void joycon_wait_for_input_report(struct joycon_ctlr *ctlr)
+{
+	int ret;
+
+	/*
+	 * If we are in the proper reporting mode, wait for an input
+	 * report prior to sending the subcommand. This improves
+	 * reliability considerably.
+	 */
+	if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) {
+		unsigned long flags;
+
+		spin_lock_irqsave(&ctlr->lock, flags);
+		ctlr->received_input_report = false;
+		spin_unlock_irqrestore(&ctlr->lock, flags);
+		ret = wait_event_timeout(ctlr->wait,
+					 ctlr->received_input_report,
+					 HZ / 4);
+		/* We will still proceed, even with a timeout here */
+		if (!ret)
+			hid_warn(ctlr->hdev,
+				 "timeout waiting for input report\n");
+	}
+}
+
+/*
+ * Sending subcommands and/or rumble data at too high a rate can cause bluetooth
+ * controller disconnections.
+ */
+static void joycon_enforce_subcmd_rate(struct joycon_ctlr *ctlr)
+{
+	static const unsigned int max_subcmd_rate_ms = 25;
+	unsigned int current_ms = jiffies_to_msecs(jiffies);
+	unsigned int delta_ms = current_ms - ctlr->last_subcmd_sent_msecs;
+
+	while (delta_ms < max_subcmd_rate_ms &&
+	       ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) {
+		joycon_wait_for_input_report(ctlr);
+		current_ms = jiffies_to_msecs(jiffies);
+		delta_ms = current_ms - ctlr->last_subcmd_sent_msecs;
+	}
+	ctlr->last_subcmd_sent_msecs = current_ms;
+}
+
+static int joycon_hid_send_sync(struct joycon_ctlr *ctlr, u8 *data, size_t len,
+				u32 timeout)
+{
+	int ret;
+	int tries = 2;
+
+	/*
+	 * The controller occasionally seems to drop subcommands. In testing,
+	 * doing one retry after a timeout appears to always work.
+	 */
+	while (tries--) {
+		joycon_enforce_subcmd_rate(ctlr);
+
+		ret = __joycon_hid_send(ctlr->hdev, data, len);
+		if (ret < 0) {
+			memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
+			return ret;
+		}
+
+		ret = wait_event_timeout(ctlr->wait, ctlr->received_resp,
+					 timeout);
+		if (!ret) {
+			hid_dbg(ctlr->hdev,
+				"synchronous send/receive timed out\n");
+			if (tries) {
+				hid_dbg(ctlr->hdev,
+					"retrying sync send after timeout\n");
+			}
+			memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
+			ret = -ETIMEDOUT;
+		} else {
+			ret = 0;
+			break;
+		}
+	}
+
+	ctlr->received_resp = false;
+	return ret;
+}
+
+static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd, u32 timeout)
+{
+	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), timeout);
+	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, u32 timeout)
+{
+	int ret;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ctlr->lock, flags);
+	/*
+	 * If the controller has been removed, just return ENODEV so the LED
+	 * subsystem doesn't print invalid errors on removal.
+	 */
+	if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) {
+		spin_unlock_irqrestore(&ctlr->lock, flags);
+		return -ENODEV;
+	}
+	memcpy(subcmd->rumble_data, ctlr->rumble_data[ctlr->rumble_queue_tail],
+	       JC_RUMBLE_DATA_SIZE);
+	spin_unlock_irqrestore(&ctlr->lock, flags);
+
+	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, timeout);
+	if (ret < 0)
+		hid_dbg(ctlr->hdev, "send subcommand failed; ret=%d\n", ret);
+	else
+		ret = 0;
+	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, HZ/4);
+}
+
+static int joycon_request_spi_flash_read(struct joycon_ctlr *ctlr,
+					 u32 start_addr, u8 size, u8 **reply)
+{
+	struct joycon_subcmd_request *req;
+	struct joycon_input_report *report;
+	u8 buffer[sizeof(*req) + 5] = { 0 };
+	u8 *data;
+	int ret;
+
+	if (!reply)
+		return -EINVAL;
+
+	req = (struct joycon_subcmd_request *)buffer;
+	req->subcmd_id = JC_SUBCMD_SPI_FLASH_READ;
+	data = req->data;
+	put_unaligned_le32(start_addr, data);
+	data[4] = size;
+
+	hid_dbg(ctlr->hdev, "requesting SPI flash data\n");
+	ret = joycon_send_subcmd(ctlr, req, 5, HZ);
+	if (ret) {
+		hid_err(ctlr->hdev, "failed reading SPI flash; ret=%d\n", ret);
+	} else {
+		report = (struct joycon_input_report *)ctlr->input_buf;
+		/* The read data starts at the 6th byte */
+		*reply = &report->subcmd_reply.data[5];
+	}
+	return ret;
+}
+
+/*
+ * User calibration's presence is denoted with a magic byte preceding it.
+ * returns 0 if magic val is present, 1 if not present, < 0 on error
+ */
+static int joycon_check_for_cal_magic(struct joycon_ctlr *ctlr, u32 flash_addr)
+{
+	int ret;
+	u8 *reply;
+
+	ret = joycon_request_spi_flash_read(ctlr, flash_addr,
+					    JC_CAL_USR_MAGIC_SIZE, &reply);
+	if (ret)
+		return ret;
+
+	return reply[0] != JC_CAL_USR_MAGIC_0 || reply[1] != JC_CAL_USR_MAGIC_1;
+}
+
+static int joycon_read_stick_calibration(struct joycon_ctlr *ctlr, u16 cal_addr,
+					 struct joycon_stick_cal *cal_x,
+					 struct joycon_stick_cal *cal_y,
+					 bool left_stick)
+{
+	s32 x_max_above;
+	s32 x_min_below;
+	s32 y_max_above;
+	s32 y_min_below;
+	u8 *raw_cal;
+	int ret;
+
+	ret = joycon_request_spi_flash_read(ctlr, cal_addr,
+					    JC_CAL_STICK_DATA_SIZE, &raw_cal);
+	if (ret)
+		return ret;
+
+	/* stick calibration parsing: note the order differs based on stick */
+	if (left_stick) {
+		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);
+	} else {
+		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;
+
+	return 0;
+}
+
+static const u16 DFLT_STICK_CAL_CEN = 2000;
+static const u16 DFLT_STICK_CAL_MAX = 3500;
+static const u16 DFLT_STICK_CAL_MIN = 500;
+static int joycon_request_calibration(struct joycon_ctlr *ctlr)
+{
+	u16 left_stick_addr = JC_CAL_FCT_DATA_LEFT_ADDR;
+	u16 right_stick_addr = JC_CAL_FCT_DATA_RIGHT_ADDR;
+	int ret;
+
+	hid_dbg(ctlr->hdev, "requesting cal data\n");
+
+	/* check if user stick calibrations are present */
+	if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_LEFT_MAGIC_ADDR)) {
+		left_stick_addr = JC_CAL_USR_LEFT_DATA_ADDR;
+		hid_info(ctlr->hdev, "using user cal for left stick\n");
+	} else {
+		hid_info(ctlr->hdev, "using factory cal for left stick\n");
+	}
+	if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_RIGHT_MAGIC_ADDR)) {
+		right_stick_addr = JC_CAL_USR_RIGHT_DATA_ADDR;
+		hid_info(ctlr->hdev, "using user cal for right stick\n");
+	} else {
+		hid_info(ctlr->hdev, "using factory cal for right stick\n");
+	}
+
+	/* read the left stick calibration data */
+	ret = joycon_read_stick_calibration(ctlr, left_stick_addr,
+					    &ctlr->left_stick_cal_x,
+					    &ctlr->left_stick_cal_y,
+					    true);
+	if (ret) {
+		hid_warn(ctlr->hdev,
+			 "Failed to read left stick cal, using dflts; e=%d\n",
+			 ret);
+
+		ctlr->left_stick_cal_x.center = DFLT_STICK_CAL_CEN;
+		ctlr->left_stick_cal_x.max = DFLT_STICK_CAL_MAX;
+		ctlr->left_stick_cal_x.min = DFLT_STICK_CAL_MIN;
+
+		ctlr->left_stick_cal_y.center = DFLT_STICK_CAL_CEN;
+		ctlr->left_stick_cal_y.max = DFLT_STICK_CAL_MAX;
+		ctlr->left_stick_cal_y.min = DFLT_STICK_CAL_MIN;
+	}
+
+	/* read the right stick calibration data */
+	ret = joycon_read_stick_calibration(ctlr, right_stick_addr,
+					    &ctlr->right_stick_cal_x,
+					    &ctlr->right_stick_cal_y,
+					    false);
+	if (ret) {
+		hid_warn(ctlr->hdev,
+			 "Failed to read right stick cal, using dflts; e=%d\n",
+			 ret);
+
+		ctlr->right_stick_cal_x.center = DFLT_STICK_CAL_CEN;
+		ctlr->right_stick_cal_x.max = DFLT_STICK_CAL_MAX;
+		ctlr->right_stick_cal_x.min = DFLT_STICK_CAL_MIN;
+
+		ctlr->right_stick_cal_y.center = DFLT_STICK_CAL_CEN;
+		ctlr->right_stick_cal_y.max = DFLT_STICK_CAL_MAX;
+		ctlr->right_stick_cal_y.min = DFLT_STICK_CAL_MIN;
+	}
+
+	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;
+}
+
+/*
+ * These divisors are calculated once rather than for each sample. They are only
+ * dependent on the IMU calibration values. They are used when processing the
+ * IMU input reports.
+ */
+static void joycon_calc_imu_cal_divisors(struct joycon_ctlr *ctlr)
+{
+	int i;
+
+	for (i = 0; i < 3; i++) {
+		ctlr->imu_cal_accel_divisor[i] = ctlr->accel_cal.scale[i] -
+						ctlr->accel_cal.offset[i];
+		ctlr->imu_cal_gyro_divisor[i] = ctlr->gyro_cal.scale[i] -
+						ctlr->gyro_cal.offset[i];
+	}
+}
+
+static const s16 DFLT_ACCEL_OFFSET /*= 0*/;
+static const s16 DFLT_ACCEL_SCALE = 16384;
+static const s16 DFLT_GYRO_OFFSET /*= 0*/;
+static const s16 DFLT_GYRO_SCALE  = 13371;
+static int joycon_request_imu_calibration(struct joycon_ctlr *ctlr)
+{
+	u16 imu_cal_addr = JC_IMU_CAL_FCT_DATA_ADDR;
+	u8 *raw_cal;
+	int ret;
+	int i;
+
+	/* check if user calibration exists */
+	if (!joycon_check_for_cal_magic(ctlr, JC_IMU_CAL_USR_MAGIC_ADDR)) {
+		imu_cal_addr = JC_IMU_CAL_USR_DATA_ADDR;
+		hid_info(ctlr->hdev, "using user cal for IMU\n");
+	} else {
+		hid_info(ctlr->hdev, "using factory cal for IMU\n");
+	}
+
+	/* request IMU calibration data */
+	hid_dbg(ctlr->hdev, "requesting IMU cal data\n");
+	ret = joycon_request_spi_flash_read(ctlr, imu_cal_addr,
+					    JC_IMU_CAL_DATA_SIZE, &raw_cal);
+	if (ret) {
+		hid_warn(ctlr->hdev,
+			 "Failed to read IMU cal, using defaults; ret=%d\n",
+			 ret);
+
+		for (i = 0; i < 3; i++) {
+			ctlr->accel_cal.offset[i] = DFLT_ACCEL_OFFSET;
+			ctlr->accel_cal.scale[i] = DFLT_ACCEL_SCALE;
+			ctlr->gyro_cal.offset[i] = DFLT_GYRO_OFFSET;
+			ctlr->gyro_cal.scale[i] = DFLT_GYRO_SCALE;
+		}
+		joycon_calc_imu_cal_divisors(ctlr);
+		return ret;
+	}
+
+	/* IMU calibration parsing */
+	for (i = 0; i < 3; i++) {
+		int j = i * 2;
+
+		ctlr->accel_cal.offset[i] = get_unaligned_le16(raw_cal + j);
+		ctlr->accel_cal.scale[i] = get_unaligned_le16(raw_cal + j + 6);
+		ctlr->gyro_cal.offset[i] = get_unaligned_le16(raw_cal + j + 12);
+		ctlr->gyro_cal.scale[i] = get_unaligned_le16(raw_cal + j + 18);
+	}
+
+	joycon_calc_imu_cal_divisors(ctlr);
+
+	hid_dbg(ctlr->hdev, "IMU calibration:\n"
+			    "a_o[0]=%d a_o[1]=%d a_o[2]=%d\n"
+			    "a_s[0]=%d a_s[1]=%d a_s[2]=%d\n"
+			    "g_o[0]=%d g_o[1]=%d g_o[2]=%d\n"
+			    "g_s[0]=%d g_s[1]=%d g_s[2]=%d\n",
+			    ctlr->accel_cal.offset[0],
+			    ctlr->accel_cal.offset[1],
+			    ctlr->accel_cal.offset[2],
+			    ctlr->accel_cal.scale[0],
+			    ctlr->accel_cal.scale[1],
+			    ctlr->accel_cal.scale[2],
+			    ctlr->gyro_cal.offset[0],
+			    ctlr->gyro_cal.offset[1],
+			    ctlr->gyro_cal.offset[2],
+			    ctlr->gyro_cal.scale[0],
+			    ctlr->gyro_cal.scale[1],
+			    ctlr->gyro_cal.scale[2]);
+
+	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, HZ);
+}
+
+static int joycon_enable_rumble(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_ENABLE_VIBRATION;
+	req->data[0] = 0x01; /* note: 0x00 would disable */
+
+	hid_dbg(ctlr->hdev, "enabling rumble\n");
+	return joycon_send_subcmd(ctlr, req, 1, HZ/4);
+}
+
+static int joycon_enable_imu(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_ENABLE_IMU;
+	req->data[0] = 0x01; /* note: 0x00 would disable */
+
+	hid_dbg(ctlr->hdev, "enabling IMU\n");
+	return joycon_send_subcmd(ctlr, req, 1, HZ);
+}
+
+static s32 joycon_map_stick_val(struct joycon_stick_cal *cal, s32 val)
+{
+	s32 center = cal->center;
+	s32 min = cal->min;
+	s32 max = cal->max;
+	s32 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, (s32)-JC_MAX_STICK_MAG, (s32)JC_MAX_STICK_MAG);
+	return new_val;
+}
+
+static void joycon_input_report_parse_imu_data(struct joycon_ctlr *ctlr,
+					       struct joycon_input_report *rep,
+					       struct joycon_imu_data *imu_data)
+{
+	u8 *raw = rep->imu_raw_bytes;
+	int i;
+
+	for (i = 0; i < 3; i++) {
+		struct joycon_imu_data *data = &imu_data[i];
+
+		data->accel_x = get_unaligned_le16(raw + 0);
+		data->accel_y = get_unaligned_le16(raw + 2);
+		data->accel_z = get_unaligned_le16(raw + 4);
+		data->gyro_x = get_unaligned_le16(raw + 6);
+		data->gyro_y = get_unaligned_le16(raw + 8);
+		data->gyro_z = get_unaligned_le16(raw + 10);
+		/* point to next imu sample */
+		raw += sizeof(struct joycon_imu_data);
+	}
+}
+
+static void joycon_parse_imu_report(struct joycon_ctlr *ctlr,
+				    struct joycon_input_report *rep)
+{
+	struct joycon_imu_data imu_data[3] = {0}; /* 3 reports per packet */
+	struct input_dev *idev = ctlr->imu_input;
+	unsigned int msecs = jiffies_to_msecs(jiffies);
+	unsigned int last_msecs = ctlr->imu_last_pkt_ms;
+	int i;
+	int value[6];
+
+	joycon_input_report_parse_imu_data(ctlr, rep, imu_data);
+
+	/*
+	 * There are complexities surrounding how we determine the timestamps we
+	 * associate with the samples we pass to userspace. The IMU input
+	 * reports do not provide us with a good timestamp. There's a quickly
+	 * incrementing 8-bit counter per input report, but it is not very
+	 * useful for this purpose (it is not entirely clear what rate it
+	 * increments at or if it varies based on packet push rate - more on
+	 * the push rate below...).
+	 *
+	 * The reverse engineering work done on the joy-cons and pro controllers
+	 * by the community seems to indicate the following:
+	 * - The controller samples the IMU every 1.35ms. It then does some of
+	 *   its own processing, probably averaging the samples out.
+	 * - Each imu input report contains 3 IMU samples, (usually 5ms apart).
+	 * - In the standard reporting mode (which this driver uses exclusively)
+	 *   input reports are pushed from the controller as follows:
+	 *      * joy-con (bluetooth): every 15 ms
+	 *      * joy-cons (in charging grip via USB): every 15 ms
+	 *      * pro controller (USB): every 15 ms
+	 *      * pro controller (bluetooth): every 8 ms (this is the wildcard)
+	 *
+	 * Further complicating matters is that some bluetooth stacks are known
+	 * to alter the controller's packet rate by hardcoding the bluetooth
+	 * SSR for the switch controllers (android's stack currently sets the
+	 * SSR to 11ms for both the joy-cons and pro controllers).
+	 *
+	 * In my own testing, I've discovered that my pro controller either
+	 * reports IMU sample batches every 11ms or every 15ms. This rate is
+	 * stable after connecting. It isn't 100% clear what determines this
+	 * rate. Importantly, even when sending every 11ms, none of the samples
+	 * are duplicates. This seems to indicate that the time deltas between
+	 * reported samples can vary based on the input report rate.
+	 *
+	 * The solution employed in this driver is to keep track of the average
+	 * time delta between IMU input reports. In testing, this value has
+	 * proven to be stable, staying at 15ms or 11ms, though other hardware
+	 * configurations and bluetooth stacks could potentially see other rates
+	 * (hopefully this will become more clear as more people use the
+	 * driver).
+	 *
+	 * Keeping track of the average report delta allows us to submit our
+	 * timestamps to userspace based on that. Each report contains 3
+	 * samples, so the IMU sampling rate should be avg_time_delta/3. We can
+	 * also use this average to detect events where we have dropped a
+	 * packet. The userspace timestamp for the samples will be adjusted
+	 * accordingly to prevent unwanted behvaior.
+	 */
+	if (!ctlr->imu_first_packet_received) {
+		ctlr->imu_timestamp_us = 0;
+		ctlr->imu_delta_samples_count = 0;
+		ctlr->imu_delta_samples_sum = 0;
+		ctlr->imu_avg_delta_ms = JC_IMU_DFLT_AVG_DELTA_MS;
+		ctlr->imu_first_packet_received = true;
+	} else {
+		unsigned int delta = msecs - last_msecs;
+		unsigned int dropped_pkts;
+		unsigned int dropped_threshold;
+
+		/* avg imu report delta housekeeping */
+		ctlr->imu_delta_samples_sum += delta;
+		ctlr->imu_delta_samples_count++;
+		if (ctlr->imu_delta_samples_count >=
+		    JC_IMU_SAMPLES_PER_DELTA_AVG) {
+			ctlr->imu_avg_delta_ms = ctlr->imu_delta_samples_sum /
+						 ctlr->imu_delta_samples_count;
+			/* don't ever want divide by zero shenanigans */
+			if (ctlr->imu_avg_delta_ms == 0) {
+				ctlr->imu_avg_delta_ms = 1;
+				hid_warn(ctlr->hdev,
+					 "calculated avg imu delta of 0\n");
+			}
+			ctlr->imu_delta_samples_count = 0;
+			ctlr->imu_delta_samples_sum = 0;
+		}
+
+		/* useful for debugging IMU sample rate */
+		hid_dbg(ctlr->hdev,
+			"imu_report: ms=%u last_ms=%u delta=%u avg_delta=%u\n",
+			msecs, last_msecs, delta, ctlr->imu_avg_delta_ms);
+
+		/* check if any packets have been dropped */
+		dropped_threshold = ctlr->imu_avg_delta_ms * 3 / 2;
+		dropped_pkts = (delta - min(delta, dropped_threshold)) /
+				ctlr->imu_avg_delta_ms;
+		ctlr->imu_timestamp_us += 1000 * ctlr->imu_avg_delta_ms;
+		if (dropped_pkts > JC_IMU_DROPPED_PKT_WARNING) {
+			hid_warn(ctlr->hdev,
+				 "compensating for %u dropped IMU reports\n",
+				 dropped_pkts);
+			hid_warn(ctlr->hdev,
+				 "delta=%u avg_delta=%u\n",
+				 delta, ctlr->imu_avg_delta_ms);
+		}
+	}
+	ctlr->imu_last_pkt_ms = msecs;
+
+	/* Each IMU input report contains three samples */
+	for (i = 0; i < 3; i++) {
+		input_event(idev, EV_MSC, MSC_TIMESTAMP,
+			    ctlr->imu_timestamp_us);
+
+		/*
+		 * These calculations (which use the controller's calibration
+		 * settings to improve the final values) are based on those
+		 * found in the community's reverse-engineering repo (linked at
+		 * top of driver). For hid-nintendo, we make sure that the final
+		 * value given to userspace is always in terms of the axis
+		 * resolution we provided.
+		 *
+		 * Currently only the gyro calculations subtract the calibration
+		 * offsets from the raw value itself. In testing, doing the same
+		 * for the accelerometer raw values decreased accuracy.
+		 *
+		 * Note that the gyro values are multiplied by the
+		 * precision-saving scaling factor to prevent large inaccuracies
+		 * due to truncation of the resolution value which would
+		 * otherwise occur. To prevent overflow (without resorting to 64
+		 * bit integer math), the mult_frac macro is used.
+		 */
+		value[0] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
+				      (imu_data[i].gyro_x -
+				       ctlr->gyro_cal.offset[0])),
+				     ctlr->gyro_cal.scale[0],
+				     ctlr->imu_cal_gyro_divisor[0]);
+		value[1] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
+				      (imu_data[i].gyro_y -
+				       ctlr->gyro_cal.offset[1])),
+				     ctlr->gyro_cal.scale[1],
+				     ctlr->imu_cal_gyro_divisor[1]);
+		value[2] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
+				      (imu_data[i].gyro_z -
+				       ctlr->gyro_cal.offset[2])),
+				     ctlr->gyro_cal.scale[2],
+				     ctlr->imu_cal_gyro_divisor[2]);
+
+		value[3] = ((s32)imu_data[i].accel_x *
+			    ctlr->accel_cal.scale[0]) /
+			    ctlr->imu_cal_accel_divisor[0];
+		value[4] = ((s32)imu_data[i].accel_y *
+			    ctlr->accel_cal.scale[1]) /
+			    ctlr->imu_cal_accel_divisor[1];
+		value[5] = ((s32)imu_data[i].accel_z *
+			    ctlr->accel_cal.scale[2]) /
+			    ctlr->imu_cal_accel_divisor[2];
+
+		hid_dbg(ctlr->hdev, "raw_gyro: g_x=%d g_y=%d g_z=%d\n",
+			imu_data[i].gyro_x, imu_data[i].gyro_y,
+			imu_data[i].gyro_z);
+		hid_dbg(ctlr->hdev, "raw_accel: a_x=%d a_y=%d a_z=%d\n",
+			imu_data[i].accel_x, imu_data[i].accel_y,
+			imu_data[i].accel_z);
+
+		/*
+		 * The right joy-con has 2 axes negated, Y and Z. This is due to
+		 * the orientation of the IMU in the controller. We negate those
+		 * axes' values in order to be consistent with the left joy-con
+		 * and the pro controller:
+		 *   X: positive is pointing toward the triggers
+		 *   Y: positive is pointing to the left
+		 *   Z: positive is pointing up (out of the buttons/sticks)
+		 * The axes follow the right-hand rule.
+		 */
+		if (jc_type_is_joycon(ctlr) && jc_type_has_right(ctlr)) {
+			int j;
+
+			/* negate all but x axis */
+			for (j = 1; j < 6; ++j) {
+				if (j == 3)
+					continue;
+				value[j] *= -1;
+			}
+		}
+
+		input_report_abs(idev, ABS_RX, value[0]);
+		input_report_abs(idev, ABS_RY, value[1]);
+		input_report_abs(idev, ABS_RZ, value[2]);
+		input_report_abs(idev, ABS_X, value[3]);
+		input_report_abs(idev, ABS_Y, value[4]);
+		input_report_abs(idev, ABS_Z, value[5]);
+		input_sync(idev);
+		/* convert to micros and divide by 3 (3 samples per report). */
+		ctlr->imu_timestamp_us += ctlr->imu_avg_delta_ms * 1000 / 3;
+	}
+}
+
+static void joycon_parse_report(struct joycon_ctlr *ctlr,
+				struct joycon_input_report *rep)
+{
+	struct input_dev *dev = ctlr->input;
+	unsigned long flags;
+	u8 tmp;
+	u32 btns;
+	unsigned long msecs = jiffies_to_msecs(jiffies);
+
+	spin_lock_irqsave(&ctlr->lock, flags);
+	if (IS_ENABLED(CONFIG_NINTENDO_FF) && rep->vibrator_report &&
+	    (msecs - ctlr->rumble_msecs) >= JC_RUMBLE_PERIOD_MS &&
+	    (ctlr->rumble_queue_head != ctlr->rumble_queue_tail ||
+	     ctlr->rumble_zero_countdown > 0)) {
+		/*
+		 * When this value reaches 0, we know we've sent multiple
+		 * packets to the controller instructing it to disable rumble.
+		 * We can safely stop sending periodic rumble packets until the
+		 * next ff effect.
+		 */
+		if (ctlr->rumble_zero_countdown > 0)
+			ctlr->rumble_zero_countdown--;
+		queue_work(ctlr->rumble_queue, &ctlr->rumble_worker);
+	}
+
+	/* Parse the battery status */
+	tmp = rep->bat_con;
+	ctlr->host_powered = tmp & BIT(0);
+	ctlr->battery_charging = tmp & BIT(4);
+	tmp = tmp >> 5;
+	switch (tmp) {
+	case 0: /* empty */
+		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+		break;
+	case 1: /* low */
+		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+		break;
+	case 2: /* medium */
+		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+		break;
+	case 3: /* high */
+		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
+		break;
+	case 4: /* full */
+		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+		break;
+	default:
+		ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
+		hid_warn(ctlr->hdev, "Invalid battery status\n");
+		break;
+	}
+	spin_unlock_irqrestore(&ctlr->lock, flags);
+
+	/* Parse the buttons and sticks */
+	btns = hid_field_extract(ctlr->hdev, rep->button_status, 0, 24);
+
+	if (jc_type_has_left(ctlr)) {
+		u16 raw_x;
+		u16 raw_y;
+		s32 x;
+		s32 y;
+
+		/* get raw stick values */
+		raw_x = hid_field_extract(ctlr->hdev, rep->left_stick, 0, 12);
+		raw_y = hid_field_extract(ctlr->hdev,
+					  rep->left_stick + 1, 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);
+		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);
+
+		if (jc_type_is_joycon(ctlr)) {
+			/* 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);
+
+			/* Report d-pad as digital buttons for the joy-cons */
+			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);
+		} else {
+			int hatx = 0;
+			int haty = 0;
+
+			/* d-pad x */
+			if (btns & JC_BTN_LEFT)
+				hatx = -1;
+			else if (btns & JC_BTN_RIGHT)
+				hatx = 1;
+			input_report_abs(dev, ABS_HAT0X, hatx);
+
+			/* d-pad y */
+			if (btns & JC_BTN_UP)
+				haty = -1;
+			else if (btns & JC_BTN_DOWN)
+				haty = 1;
+			input_report_abs(dev, ABS_HAT0Y, haty);
+		}
+	}
+	if (jc_type_has_right(ctlr)) {
+		u16 raw_x;
+		u16 raw_y;
+		s32 x;
+		s32 y;
+
+		/* get raw stick values */
+		raw_x = hid_field_extract(ctlr->hdev, rep->right_stick, 0, 12);
+		raw_y = hid_field_extract(ctlr->hdev,
+					  rep->right_stick + 1, 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 (jc_type_is_joycon(ctlr)) {
+			/* 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_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);
+
+	/*
+	 * Immediately after receiving a report is the most reliable time to
+	 * send a subcommand to the controller. Wake any subcommand senders
+	 * waiting for a report.
+	 */
+	if (unlikely(mutex_is_locked(&ctlr->output_mutex))) {
+		spin_lock_irqsave(&ctlr->lock, flags);
+		ctlr->received_input_report = true;
+		spin_unlock_irqrestore(&ctlr->lock, flags);
+		wake_up(&ctlr->wait);
+	}
+
+	/* parse IMU data if present */
+	if (rep->id == JC_INPUT_IMU_DATA)
+		joycon_parse_imu_report(ctlr, rep);
+}
+
+static int joycon_send_rumble_data(struct joycon_ctlr *ctlr)
+{
+	int ret;
+	unsigned long flags;
+	struct joycon_rumble_output rumble_output = { 0 };
+
+	spin_lock_irqsave(&ctlr->lock, flags);
+	/*
+	 * If the controller has been removed, just return ENODEV so the LED
+	 * subsystem doesn't print invalid errors on removal.
+	 */
+	if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) {
+		spin_unlock_irqrestore(&ctlr->lock, flags);
+		return -ENODEV;
+	}
+	memcpy(rumble_output.rumble_data,
+	       ctlr->rumble_data[ctlr->rumble_queue_tail],
+	       JC_RUMBLE_DATA_SIZE);
+	spin_unlock_irqrestore(&ctlr->lock, flags);
+
+	rumble_output.output_id = JC_OUTPUT_RUMBLE_ONLY;
+	rumble_output.packet_num = ctlr->subcmd_num;
+	if (++ctlr->subcmd_num > 0xF)
+		ctlr->subcmd_num = 0;
+
+	joycon_enforce_subcmd_rate(ctlr);
+
+	ret = __joycon_hid_send(ctlr->hdev, (u8 *)&rumble_output,
+				sizeof(rumble_output));
+	return ret;
+}
+
+static void joycon_rumble_worker(struct work_struct *work)
+{
+	struct joycon_ctlr *ctlr = container_of(work, struct joycon_ctlr,
+							rumble_worker);
+	unsigned long flags;
+	bool again = true;
+	int ret;
+
+	while (again) {
+		mutex_lock(&ctlr->output_mutex);
+		ret = joycon_send_rumble_data(ctlr);
+		mutex_unlock(&ctlr->output_mutex);
+
+		/* -ENODEV means the controller was just unplugged */
+		spin_lock_irqsave(&ctlr->lock, flags);
+		if (ret < 0 && ret != -ENODEV &&
+		    ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED)
+			hid_warn(ctlr->hdev, "Failed to set rumble; e=%d", ret);
+
+		ctlr->rumble_msecs = jiffies_to_msecs(jiffies);
+		if (ctlr->rumble_queue_tail != ctlr->rumble_queue_head) {
+			if (++ctlr->rumble_queue_tail >= JC_RUMBLE_QUEUE_SIZE)
+				ctlr->rumble_queue_tail = 0;
+		} else {
+			again = false;
+		}
+		spin_unlock_irqrestore(&ctlr->lock, flags);
+	}
+}
+
+#if IS_ENABLED(CONFIG_NINTENDO_FF)
+static struct joycon_rumble_freq_data joycon_find_rumble_freq(u16 freq)
+{
+	const size_t length = ARRAY_SIZE(joycon_rumble_frequencies);
+	const struct joycon_rumble_freq_data *data = joycon_rumble_frequencies;
+	int i = 0;
+
+	if (freq > data[0].freq) {
+		for (i = 1; i < length - 1; i++) {
+			if (freq > data[i - 1].freq && freq <= data[i].freq)
+				break;
+		}
+	}
+
+	return data[i];
+}
+
+static struct joycon_rumble_amp_data joycon_find_rumble_amp(u16 amp)
+{
+	const size_t length = ARRAY_SIZE(joycon_rumble_amplitudes);
+	const struct joycon_rumble_amp_data *data = joycon_rumble_amplitudes;
+	int i = 0;
+
+	if (amp > data[0].amp) {
+		for (i = 1; i < length - 1; i++) {
+			if (amp > data[i - 1].amp && amp <= data[i].amp)
+				break;
+		}
+	}
+
+	return data[i];
+}
+
+static void joycon_encode_rumble(u8 *data, u16 freq_low, u16 freq_high, u16 amp)
+{
+	struct joycon_rumble_freq_data freq_data_low;
+	struct joycon_rumble_freq_data freq_data_high;
+	struct joycon_rumble_amp_data amp_data;
+
+	freq_data_low = joycon_find_rumble_freq(freq_low);
+	freq_data_high = joycon_find_rumble_freq(freq_high);
+	amp_data = joycon_find_rumble_amp(amp);
+
+	data[0] = (freq_data_high.high >> 8) & 0xFF;
+	data[1] = (freq_data_high.high & 0xFF) + amp_data.high;
+	data[2] = freq_data_low.low + ((amp_data.low >> 8) & 0xFF);
+	data[3] = amp_data.low & 0xFF;
+}
+
+static const u16 JOYCON_MAX_RUMBLE_HIGH_FREQ	= 1253;
+static const u16 JOYCON_MIN_RUMBLE_HIGH_FREQ	= 82;
+static const u16 JOYCON_MAX_RUMBLE_LOW_FREQ	= 626;
+static const u16 JOYCON_MIN_RUMBLE_LOW_FREQ	= 41;
+
+static void joycon_clamp_rumble_freqs(struct joycon_ctlr *ctlr)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ctlr->lock, flags);
+	ctlr->rumble_ll_freq = clamp(ctlr->rumble_ll_freq,
+				     JOYCON_MIN_RUMBLE_LOW_FREQ,
+				     JOYCON_MAX_RUMBLE_LOW_FREQ);
+	ctlr->rumble_lh_freq = clamp(ctlr->rumble_lh_freq,
+				     JOYCON_MIN_RUMBLE_HIGH_FREQ,
+				     JOYCON_MAX_RUMBLE_HIGH_FREQ);
+	ctlr->rumble_rl_freq = clamp(ctlr->rumble_rl_freq,
+				     JOYCON_MIN_RUMBLE_LOW_FREQ,
+				     JOYCON_MAX_RUMBLE_LOW_FREQ);
+	ctlr->rumble_rh_freq = clamp(ctlr->rumble_rh_freq,
+				     JOYCON_MIN_RUMBLE_HIGH_FREQ,
+				     JOYCON_MAX_RUMBLE_HIGH_FREQ);
+	spin_unlock_irqrestore(&ctlr->lock, flags);
+}
+
+static int joycon_set_rumble(struct joycon_ctlr *ctlr, u16 amp_r, u16 amp_l,
+			     bool schedule_now)
+{
+	u8 data[JC_RUMBLE_DATA_SIZE];
+	u16 amp;
+	u16 freq_r_low;
+	u16 freq_r_high;
+	u16 freq_l_low;
+	u16 freq_l_high;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ctlr->lock, flags);
+	freq_r_low = ctlr->rumble_rl_freq;
+	freq_r_high = ctlr->rumble_rh_freq;
+	freq_l_low = ctlr->rumble_ll_freq;
+	freq_l_high = ctlr->rumble_lh_freq;
+	/* limit number of silent rumble packets to reduce traffic */
+	if (amp_l != 0 || amp_r != 0)
+		ctlr->rumble_zero_countdown = JC_RUMBLE_ZERO_AMP_PKT_CNT;
+	spin_unlock_irqrestore(&ctlr->lock, flags);
+
+	/* right joy-con */
+	amp = amp_r * (u32)joycon_max_rumble_amp / 65535;
+	joycon_encode_rumble(data + 4, freq_r_low, freq_r_high, amp);
+
+	/* left joy-con */
+	amp = amp_l * (u32)joycon_max_rumble_amp / 65535;
+	joycon_encode_rumble(data, freq_l_low, freq_l_high, amp);
+
+	spin_lock_irqsave(&ctlr->lock, flags);
+	if (++ctlr->rumble_queue_head >= JC_RUMBLE_QUEUE_SIZE)
+		ctlr->rumble_queue_head = 0;
+	memcpy(ctlr->rumble_data[ctlr->rumble_queue_head], data,
+	       JC_RUMBLE_DATA_SIZE);
+	spin_unlock_irqrestore(&ctlr->lock, flags);
+
+	/* don't wait for the periodic send (reduces latency) */
+	if (schedule_now)
+		queue_work(ctlr->rumble_queue, &ctlr->rumble_worker);
+
+	return 0;
+}
+
+static int joycon_play_effect(struct input_dev *dev, void *data,
+						     struct ff_effect *effect)
+{
+	struct joycon_ctlr *ctlr = input_get_drvdata(dev);
+
+	if (effect->type != FF_RUMBLE)
+		return 0;
+
+	return joycon_set_rumble(ctlr,
+				 effect->u.rumble.weak_magnitude,
+				 effect->u.rumble.strong_magnitude,
+				 true);
+}
+#endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */
+
+static const unsigned int joycon_button_inputs_l[] = {
+	BTN_SELECT, BTN_Z, BTN_THUMBL,
+	BTN_TL, BTN_TL2,
+	0 /* 0 signals end of array */
+};
+
+static const unsigned int joycon_button_inputs_r[] = {
+	BTN_START, BTN_MODE, BTN_THUMBR,
+	BTN_SOUTH, BTN_EAST, BTN_NORTH, BTN_WEST,
+	BTN_TR, BTN_TR2,
+	0 /* 0 signals end of array */
+};
+
+/* We report joy-con d-pad inputs as buttons and pro controller as a hat. */
+static const unsigned int joycon_dpad_inputs_jc[] = {
+	BTN_DPAD_UP, BTN_DPAD_DOWN, BTN_DPAD_LEFT, BTN_DPAD_RIGHT,
+};
+
+static int joycon_input_create(struct joycon_ctlr *ctlr)
+{
+	struct hid_device *hdev;
+	const char *name;
+	const char *imu_name;
+	int ret;
+	int i;
+
+	hdev = ctlr->hdev;
+
+	switch (hdev->product) {
+	case USB_DEVICE_ID_NINTENDO_PROCON:
+		name = "Nintendo Switch Pro Controller";
+		imu_name = "Nintendo Switch Pro Controller IMU";
+		break;
+	case USB_DEVICE_ID_NINTENDO_CHRGGRIP:
+		if (jc_type_has_left(ctlr)) {
+			name = "Nintendo Switch Left Joy-Con (Grip)";
+			imu_name = "Nintendo Switch Left Joy-Con IMU (Grip)";
+		} else {
+			name = "Nintendo Switch Right Joy-Con (Grip)";
+			imu_name = "Nintendo Switch Right Joy-Con IMU (Grip)";
+		}
+		break;
+	case USB_DEVICE_ID_NINTENDO_JOYCONL:
+		name = "Nintendo Switch Left Joy-Con";
+		imu_name = "Nintendo Switch Left Joy-Con IMU";
+		break;
+	case USB_DEVICE_ID_NINTENDO_JOYCONR:
+		name = "Nintendo Switch Right Joy-Con";
+		imu_name = "Nintendo Switch Right Joy-Con IMU";
+		break;
+	default: /* Should be impossible */
+		hid_err(hdev, "Invalid hid product\n");
+		return -EINVAL;
+	}
+
+	ctlr->input = devm_input_allocate_device(&hdev->dev);
+	if (!ctlr->input)
+		return -ENOMEM;
+	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->uniq = ctlr->mac_addr_str;
+	ctlr->input->name = name;
+	input_set_drvdata(ctlr->input, ctlr);
+
+	/* set up sticks and buttons */
+	if (jc_type_has_left(ctlr)) {
+		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);
+
+		for (i = 0; joycon_button_inputs_l[i] > 0; i++)
+			input_set_capability(ctlr->input, EV_KEY,
+					     joycon_button_inputs_l[i]);
+
+		/* configure d-pad differently for joy-con vs pro controller */
+		if (hdev->product != USB_DEVICE_ID_NINTENDO_PROCON) {
+			for (i = 0; joycon_dpad_inputs_jc[i] > 0; i++)
+				input_set_capability(ctlr->input, EV_KEY,
+						     joycon_dpad_inputs_jc[i]);
+		} else {
+			input_set_abs_params(ctlr->input, ABS_HAT0X,
+					     -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG,
+					     JC_DPAD_FUZZ, JC_DPAD_FLAT);
+			input_set_abs_params(ctlr->input, ABS_HAT0Y,
+					     -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG,
+					     JC_DPAD_FUZZ, JC_DPAD_FLAT);
+		}
+	}
+	if (jc_type_has_right(ctlr)) {
+		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);
+
+		for (i = 0; joycon_button_inputs_r[i] > 0; i++)
+			input_set_capability(ctlr->input, EV_KEY,
+					     joycon_button_inputs_r[i]);
+	}
+
+	/* Let's report joy-con S triggers separately */
+	if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL) {
+		input_set_capability(ctlr->input, EV_KEY, BTN_TR);
+		input_set_capability(ctlr->input, EV_KEY, BTN_TR2);
+	} else if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR) {
+		input_set_capability(ctlr->input, EV_KEY, BTN_TL);
+		input_set_capability(ctlr->input, EV_KEY, BTN_TL2);
+	}
+
+#if IS_ENABLED(CONFIG_NINTENDO_FF)
+	/* set up rumble */
+	input_set_capability(ctlr->input, EV_FF, FF_RUMBLE);
+	input_ff_create_memless(ctlr->input, NULL, joycon_play_effect);
+	ctlr->rumble_ll_freq = JC_RUMBLE_DFLT_LOW_FREQ;
+	ctlr->rumble_lh_freq = JC_RUMBLE_DFLT_HIGH_FREQ;
+	ctlr->rumble_rl_freq = JC_RUMBLE_DFLT_LOW_FREQ;
+	ctlr->rumble_rh_freq = JC_RUMBLE_DFLT_HIGH_FREQ;
+	joycon_clamp_rumble_freqs(ctlr);
+	joycon_set_rumble(ctlr, 0, 0, false);
+	ctlr->rumble_msecs = jiffies_to_msecs(jiffies);
+#endif
+
+	ret = input_register_device(ctlr->input);
+	if (ret)
+		return ret;
+
+	/* configure the imu input device */
+	ctlr->imu_input = devm_input_allocate_device(&hdev->dev);
+	if (!ctlr->imu_input)
+		return -ENOMEM;
+
+	ctlr->imu_input->id.bustype = hdev->bus;
+	ctlr->imu_input->id.vendor = hdev->vendor;
+	ctlr->imu_input->id.product = hdev->product;
+	ctlr->imu_input->id.version = hdev->version;
+	ctlr->imu_input->uniq = ctlr->mac_addr_str;
+	ctlr->imu_input->name = imu_name;
+	input_set_drvdata(ctlr->imu_input, ctlr);
+
+	/* configure imu axes */
+	input_set_abs_params(ctlr->imu_input, ABS_X,
+			     -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
+			     JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
+	input_set_abs_params(ctlr->imu_input, ABS_Y,
+			     -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
+			     JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
+	input_set_abs_params(ctlr->imu_input, ABS_Z,
+			     -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
+			     JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
+	input_abs_set_res(ctlr->imu_input, ABS_X, JC_IMU_ACCEL_RES_PER_G);
+	input_abs_set_res(ctlr->imu_input, ABS_Y, JC_IMU_ACCEL_RES_PER_G);
+	input_abs_set_res(ctlr->imu_input, ABS_Z, JC_IMU_ACCEL_RES_PER_G);
+
+	input_set_abs_params(ctlr->imu_input, ABS_RX,
+			     -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
+			     JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
+	input_set_abs_params(ctlr->imu_input, ABS_RY,
+			     -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
+			     JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
+	input_set_abs_params(ctlr->imu_input, ABS_RZ,
+			     -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
+			     JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
+
+	input_abs_set_res(ctlr->imu_input, ABS_RX, JC_IMU_GYRO_RES_PER_DPS);
+	input_abs_set_res(ctlr->imu_input, ABS_RY, JC_IMU_GYRO_RES_PER_DPS);
+	input_abs_set_res(ctlr->imu_input, ABS_RZ, JC_IMU_GYRO_RES_PER_DPS);
+
+	__set_bit(EV_MSC, ctlr->imu_input->evbit);
+	__set_bit(MSC_TIMESTAMP, ctlr->imu_input->mscbit);
+	__set_bit(INPUT_PROP_ACCELEROMETER, ctlr->imu_input->propbit);
+
+	ret = input_register_device(ctlr->imu_input);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int joycon_player_led_brightness_set(struct led_classdev *led,
+					    enum led_brightness brightness)
+{
+	struct device *dev = led->dev->parent;
+	struct hid_device *hdev = to_hid_device(dev);
+	struct joycon_ctlr *ctlr;
+	int val = 0;
+	int i;
+	int ret;
+	int num;
+
+	ctlr = hid_get_drvdata(hdev);
+	if (!ctlr) {
+		hid_err(hdev, "No controller data\n");
+		return -ENODEV;
+	}
+
+	/* determine which player led this is */
+	for (num = 0; num < JC_NUM_LEDS; num++) {
+		if (&ctlr->leds[num] == led)
+			break;
+	}
+	if (num >= JC_NUM_LEDS)
+		return -EINVAL;
+
+	mutex_lock(&ctlr->output_mutex);
+	for (i = 0; i < JC_NUM_LEDS; i++) {
+		if (i == num)
+			val |= brightness << i;
+		else
+			val |= ctlr->leds[i].brightness << i;
+	}
+	ret = joycon_set_player_leds(ctlr, 0, val);
+	mutex_unlock(&ctlr->output_mutex);
+
+	return ret;
+}
+
+static int joycon_home_led_brightness_set(struct led_classdev *led,
+					  enum led_brightness brightness)
+{
+	struct device *dev = led->dev->parent;
+	struct hid_device *hdev = to_hid_device(dev);
+	struct joycon_ctlr *ctlr;
+	struct joycon_subcmd_request *req;
+	u8 buffer[sizeof(*req) + 5] = { 0 };
+	u8 *data;
+	int ret;
+
+	ctlr = hid_get_drvdata(hdev);
+	if (!ctlr) {
+		hid_err(hdev, "No controller data\n");
+		return -ENODEV;
+	}
+
+	req = (struct joycon_subcmd_request *)buffer;
+	req->subcmd_id = JC_SUBCMD_SET_HOME_LIGHT;
+	data = req->data;
+	data[0] = 0x01;
+	data[1] = brightness << 4;
+	data[2] = brightness | (brightness << 4);
+	data[3] = 0x11;
+	data[4] = 0x11;
+
+	hid_dbg(hdev, "setting home led brightness\n");
+	mutex_lock(&ctlr->output_mutex);
+	ret = joycon_send_subcmd(ctlr, req, 5, HZ/4);
+	mutex_unlock(&ctlr->output_mutex);
+
+	return ret;
+}
+
+static DEFINE_MUTEX(joycon_input_num_mutex);
+static int joycon_leds_create(struct joycon_ctlr *ctlr)
+{
+	struct hid_device *hdev = ctlr->hdev;
+	struct device *dev = &hdev->dev;
+	const char *d_name = dev_name(dev);
+	struct led_classdev *led;
+	char *name;
+	int ret = 0;
+	int i;
+	static int input_num = 1;
+
+	/* 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);
+
+	/* configure the player LEDs */
+	for (i = 0; i < JC_NUM_LEDS; i++) {
+		name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s",
+				      d_name,
+				      "green",
+				      joycon_player_led_names[i]);
+		if (!name)
+			return -ENOMEM;
+
+		led = &ctlr->leds[i];
+		led->name = name;
+		led->brightness = ((i + 1) <= input_num) ? 1 : 0;
+		led->max_brightness = 1;
+		led->brightness_set_blocking =
+					joycon_player_led_brightness_set;
+		led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE;
+
+		ret = devm_led_classdev_register(&hdev->dev, led);
+		if (ret) {
+			hid_err(hdev, "Failed registering %s LED\n", led->name);
+			return ret;
+		}
+	}
+
+	if (++input_num > 4)
+		input_num = 1;
+	mutex_unlock(&joycon_input_num_mutex);
+
+	/* configure the home LED */
+	if (jc_type_has_right(ctlr)) {
+		name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s",
+				      d_name,
+				      "blue",
+				      LED_FUNCTION_PLAYER5);
+		if (!name)
+			return -ENOMEM;
+
+		led = &ctlr->home_led;
+		led->name = name;
+		led->brightness = 0;
+		led->max_brightness = 0xF;
+		led->brightness_set_blocking = joycon_home_led_brightness_set;
+		led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE;
+		ret = devm_led_classdev_register(&hdev->dev, led);
+		if (ret) {
+			hid_err(hdev, "Failed registering home led\n");
+			return ret;
+		}
+		/* Set the home LED to 0 as default state */
+		ret = joycon_home_led_brightness_set(led, 0);
+		if (ret) {
+			hid_err(hdev, "Failed to set home LED dflt; ret=%d\n",
+									ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int joycon_battery_get_property(struct power_supply *supply,
+				       enum power_supply_property prop,
+				       union power_supply_propval *val)
+{
+	struct joycon_ctlr *ctlr = power_supply_get_drvdata(supply);
+	unsigned long flags;
+	int ret = 0;
+	u8 capacity;
+	bool charging;
+	bool powered;
+
+	spin_lock_irqsave(&ctlr->lock, flags);
+	capacity = ctlr->battery_capacity;
+	charging = ctlr->battery_charging;
+	powered = ctlr->host_powered;
+	spin_unlock_irqrestore(&ctlr->lock, flags);
+
+	switch (prop) {
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = 1;
+		break;
+	case POWER_SUPPLY_PROP_SCOPE:
+		val->intval = POWER_SUPPLY_SCOPE_DEVICE;
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+		val->intval = capacity;
+		break;
+	case POWER_SUPPLY_PROP_STATUS:
+		if (charging)
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		else if (capacity == POWER_SUPPLY_CAPACITY_LEVEL_FULL &&
+			 powered)
+			val->intval = POWER_SUPPLY_STATUS_FULL;
+		else
+			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static enum power_supply_property joycon_battery_props[] = {
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+	POWER_SUPPLY_PROP_SCOPE,
+	POWER_SUPPLY_PROP_STATUS,
+};
+
+static int joycon_power_supply_create(struct joycon_ctlr *ctlr)
+{
+	struct hid_device *hdev = ctlr->hdev;
+	struct power_supply_config supply_config = { .drv_data = ctlr, };
+	const char * const name_fmt = "nintendo_switch_controller_battery_%s";
+	int ret = 0;
+
+	/* Set initially to unknown before receiving first input report */
+	ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
+
+	/* Configure the battery's description */
+	ctlr->battery_desc.properties = joycon_battery_props;
+	ctlr->battery_desc.num_properties =
+					ARRAY_SIZE(joycon_battery_props);
+	ctlr->battery_desc.get_property = joycon_battery_get_property;
+	ctlr->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
+	ctlr->battery_desc.use_for_apm = 0;
+	ctlr->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
+						 name_fmt,
+						 dev_name(&hdev->dev));
+	if (!ctlr->battery_desc.name)
+		return -ENOMEM;
+
+	ctlr->battery = devm_power_supply_register(&hdev->dev,
+						   &ctlr->battery_desc,
+						   &supply_config);
+	if (IS_ERR(ctlr->battery)) {
+		ret = PTR_ERR(ctlr->battery);
+		hid_err(hdev, "Failed to register battery; ret=%d\n", ret);
+		return ret;
+	}
+
+	return power_supply_powers(ctlr->battery, &hdev->dev);
+}
+
+static int joycon_read_info(struct joycon_ctlr *ctlr)
+{
+	int ret;
+	int i;
+	int j;
+	struct joycon_subcmd_request req = { 0 };
+	struct joycon_input_report *report;
+
+	req.subcmd_id = JC_SUBCMD_REQ_DEV_INFO;
+	ret = joycon_send_subcmd(ctlr, &req, 0, HZ);
+	if (ret) {
+		hid_err(ctlr->hdev, "Failed to get joycon info; ret=%d\n", ret);
+		return ret;
+	}
+
+	report = (struct joycon_input_report *)ctlr->input_buf;
+
+	for (i = 4, j = 0; j < 6; i++, j++)
+		ctlr->mac_addr[j] = report->subcmd_reply.data[i];
+
+	ctlr->mac_addr_str = devm_kasprintf(&ctlr->hdev->dev, GFP_KERNEL,
+					    "%02X:%02X:%02X:%02X:%02X:%02X",
+					    ctlr->mac_addr[0],
+					    ctlr->mac_addr[1],
+					    ctlr->mac_addr[2],
+					    ctlr->mac_addr[3],
+					    ctlr->mac_addr[4],
+					    ctlr->mac_addr[5]);
+	if (!ctlr->mac_addr_str)
+		return -ENOMEM;
+	hid_info(ctlr->hdev, "controller MAC = %s\n", ctlr->mac_addr_str);
+
+	/* Retrieve the type so we can distinguish for charging grip */
+	ctlr->ctlr_type = report->subcmd_reply.data[2];
+
+	return 0;
+}
+
+/* Common handler for parsing inputs */
+static int joycon_ctlr_read_handler(struct joycon_ctlr *ctlr, u8 *data,
+							      int size)
+{
+	if (data[0] == JC_INPUT_SUBCMD_REPLY || data[0] == JC_INPUT_IMU_DATA ||
+	    data[0] == JC_INPUT_MCU_DATA) {
+		if (size >= 12) /* make sure it contains the input report */
+			joycon_parse_report(ctlr,
+					    (struct joycon_input_report *)data);
+	}
+
+	return 0;
+}
+
+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->subcmd_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 nintendo_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 int nintendo_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;
+	ctlr->rumble_queue_head = JC_RUMBLE_QUEUE_SIZE - 1;
+	ctlr->rumble_queue_tail = 0;
+	hid_set_drvdata(hdev, ctlr);
+	mutex_init(&ctlr->output_mutex);
+	init_waitqueue_head(&ctlr->wait);
+	spin_lock_init(&ctlr->lock);
+	ctlr->rumble_queue = alloc_workqueue("hid-nintendo-rumble_wq",
+					     WQ_FREEZABLE | WQ_MEM_RECLAIM, 0);
+	INIT_WORK(&ctlr->rumble_worker, joycon_rumble_worker);
+
+	ret = hid_parse(hdev);
+	if (ret) {
+		hid_err(hdev, "HID parse failed\n");
+		goto err_wq;
+	}
+
+	/*
+	 * Patch the hw version of pro controller/joycons, so applications can
+	 * distinguish between the default HID mappings and the mappings defined
+	 * by the Linux game controller spec. This is important for the SDL2
+	 * library, which has a game controller database, which uses device ids
+	 * in combination with version as a key.
+	 */
+	hdev->version |= 0x8000;
+
+	ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+	if (ret) {
+		hid_err(hdev, "HW start failed\n");
+		goto err_wq;
+	}
+
+	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 handshake command fails, assume ble pro controller */
+	if ((jc_type_is_procon(ctlr) || jc_type_is_chrggrip(ctlr)) &&
+	    !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ)) {
+		hid_dbg(hdev, "detected USB controller\n");
+		/* set baudrate for improved latency */
+		ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M, HZ);
+		if (ret) {
+			hid_err(hdev, "Failed to set baudrate; ret=%d\n", ret);
+			goto err_mutex;
+		}
+		/* handshake */
+		ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ);
+		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, HZ/10);
+	} else if (jc_type_is_chrggrip(ctlr)) {
+		hid_err(hdev, "Failed charging grip handshake\n");
+		ret = -ETIMEDOUT;
+		goto err_mutex;
+	}
+
+	/* get controller calibration data, and parse it */
+	ret = joycon_request_calibration(ctlr);
+	if (ret) {
+		/*
+		 * We can function with default calibration, but it may be
+		 * inaccurate. Provide a warning, and continue on.
+		 */
+		hid_warn(hdev, "Analog stick positions may be inaccurate\n");
+	}
+
+	/* get IMU calibration data, and parse it */
+	ret = joycon_request_imu_calibration(ctlr);
+	if (ret) {
+		/*
+		 * We can function with default calibration, but it may be
+		 * inaccurate. Provide a warning, and continue on.
+		 */
+		hid_warn(hdev, "Unable to read IMU calibration data\n");
+	}
+
+	/* 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;
+	}
+
+	/* Enable rumble */
+	ret = joycon_enable_rumble(ctlr);
+	if (ret) {
+		hid_err(hdev, "Failed to enable rumble; ret=%d\n", ret);
+		goto err_mutex;
+	}
+
+	/* Enable the IMU */
+	ret = joycon_enable_imu(ctlr);
+	if (ret) {
+		hid_err(hdev, "Failed to enable the IMU; ret=%d\n", ret);
+		goto err_mutex;
+	}
+
+	ret = joycon_read_info(ctlr);
+	if (ret) {
+		hid_err(hdev, "Failed to retrieve controller info; ret=%d\n",
+			ret);
+		goto err_mutex;
+	}
+
+	mutex_unlock(&ctlr->output_mutex);
+
+	/* Initialize the leds */
+	ret = joycon_leds_create(ctlr);
+	if (ret) {
+		hid_err(hdev, "Failed to create leds; ret=%d\n", ret);
+		goto err_close;
+	}
+
+	/* Initialize the battery power supply */
+	ret = joycon_power_supply_create(ctlr);
+	if (ret) {
+		hid_err(hdev, "Failed to create power_supply; ret=%d\n", ret);
+		goto err_close;
+	}
+
+	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:
+	hid_hw_close(hdev);
+err_stop:
+	hid_hw_stop(hdev);
+err_wq:
+	destroy_workqueue(ctlr->rumble_queue);
+err:
+	hid_err(hdev, "probe - fail = %d\n", ret);
+	return ret;
+}
+
+static void nintendo_hid_remove(struct hid_device *hdev)
+{
+	struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
+	unsigned long flags;
+
+	hid_dbg(hdev, "remove\n");
+
+	/* Prevent further attempts at sending subcommands. */
+	spin_lock_irqsave(&ctlr->lock, flags);
+	ctlr->ctlr_state = JOYCON_CTLR_STATE_REMOVED;
+	spin_unlock_irqrestore(&ctlr->lock, flags);
+
+	destroy_workqueue(ctlr->rumble_queue);
+
+	hid_hw_close(hdev);
+	hid_hw_stop(hdev);
+}
+
+static const struct hid_device_id nintendo_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_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
+			 USB_DEVICE_ID_NINTENDO_CHRGGRIP) },
+	{ 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, nintendo_hid_devices);
+
+static struct hid_driver nintendo_hid_driver = {
+	.name		= "nintendo",
+	.id_table	= nintendo_hid_devices,
+	.probe		= nintendo_hid_probe,
+	.remove		= nintendo_hid_remove,
+	.raw_event	= nintendo_hid_event,
+};
+module_hid_driver(nintendo_hid_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Daniel J. Ogorchock <djogorchock@gmail.com>");
+MODULE_DESCRIPTION("Driver for Nintendo Switch Controllers");
+