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hid-nintendo.c
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hid-nintendo.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* HID driver for Nintendo Switch Joy-Cons and Pro Controllers
*
* Copyright (c) 2019-2021 Daniel J. Ogorchock <[email protected]>
*
* 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;
};
#if IS_ENABLED(CONFIG_NINTENDO_FF)
/*
* 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 }
};
static const u16 JC_RUMBLE_DFLT_LOW_FREQ = 160;
static const u16 JC_RUMBLE_DFLT_HIGH_FREQ = 320;
static const unsigned short JC_RUMBLE_ZERO_AMP_PKT_CNT = 5;
#endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */
static const u16 JC_RUMBLE_PERIOD_MS = 50;
/* 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 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_input_report_msecs;
unsigned int last_subcmd_sent_msecs;
unsigned int consecutive_valid_report_deltas;
/* 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.
*/
#define JC_INPUT_REPORT_MIN_DELTA 8
#define JC_INPUT_REPORT_MAX_DELTA 17
#define JC_SUBCMD_TX_OFFSET_MS 4
#define JC_SUBCMD_VALID_DELTA_REQ 3
#define JC_SUBCMD_RATE_MAX_ATTEMPTS 500
#define JC_SUBCMD_RATE_LIMITER_USB_MS 20
#define JC_SUBCMD_RATE_LIMITER_BT_MS 60
#define JC_SUBCMD_RATE_LIMITER_MS(ctlr) ((ctlr)->hdev->bus == BUS_USB ? JC_SUBCMD_RATE_LIMITER_USB_MS : JC_SUBCMD_RATE_LIMITER_BT_MS)
static void joycon_enforce_subcmd_rate(struct joycon_ctlr *ctlr)
{
unsigned int current_ms;
unsigned long subcmd_delta;
int consecutive_valid_deltas = 0;
int attempts = 0;
unsigned long flags;
if (unlikely(ctlr->ctlr_state != JOYCON_CTLR_STATE_READ))
return;
do {
joycon_wait_for_input_report(ctlr);
current_ms = jiffies_to_msecs(jiffies);
subcmd_delta = current_ms - ctlr->last_subcmd_sent_msecs;
spin_lock_irqsave(&ctlr->lock, flags);
consecutive_valid_deltas = ctlr->consecutive_valid_report_deltas;
spin_unlock_irqrestore(&ctlr->lock, flags);
attempts++;
} while ((consecutive_valid_deltas < JC_SUBCMD_VALID_DELTA_REQ ||
subcmd_delta < JC_SUBCMD_RATE_LIMITER_MS(ctlr)) &&
ctlr->ctlr_state == JOYCON_CTLR_STATE_READ &&
attempts < JC_SUBCMD_RATE_MAX_ATTEMPTS);
if (attempts >= JC_SUBCMD_RATE_MAX_ATTEMPTS) {
hid_warn(ctlr->hdev, "%s: exceeded max attempts", __func__);
return;
}
ctlr->last_subcmd_sent_msecs = current_ms;
/*
* Wait a short time after receiving an input report before
* transmitting. This should reduce odds of a TX coinciding with an RX.
* Minimizing concurrent BT traffic with the controller seems to lower
* the rate of disconnections.
*/
msleep(JC_SUBCMD_TX_OFFSET_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;
/* check if calibration values are plausible */
if (cal_x->min >= cal_x->center || cal_x->center >= cal_x->max ||
cal_y->min >= cal_y->center || cal_y->center >= cal_y->max)
ret = -EINVAL;
return ret;
}
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 void joycon_use_default_calibration(struct hid_device *hdev,
struct joycon_stick_cal *cal_x,
struct joycon_stick_cal *cal_y,
const char *stick, int ret)
{
hid_warn(hdev,
"Failed to read %s stick cal, using defaults; e=%d\n",
stick, ret);
cal_x->center = cal_y->center = DFLT_STICK_CAL_CEN;
cal_x->max = cal_y->max = DFLT_STICK_CAL_MAX;
cal_x->min = cal_y->min = DFLT_STICK_CAL_MIN;
}
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)
joycon_use_default_calibration(ctlr->hdev,
&ctlr->left_stick_cal_x,
&ctlr->left_stick_cal_y,
"left", ret);
/* 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)
joycon_use_default_calibration(ctlr->hdev,
&ctlr->right_stick_cal_x,
&ctlr->right_stick_cal_y,
"right", ret);
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 */