drivers/hid/hid-nintendo.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * HID driver for Nintendo Switch Joy-Cons and Pro Controllers
   4  *
   5  * Copyright (c) 2019-2021 Daniel J. Ogorchock <djogorchock@gmail.com>
   6  *
   7  * The following resources/projects were referenced for this driver:
   8  *   https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
   9  *   https://gitlab.com/pjranki/joycon-linux-kernel (Peter Rankin)
  10  *   https://github.com/FrotBot/SwitchProConLinuxUSB
  11  *   https://github.com/MTCKC/ProconXInput
  12  *   https://github.com/Davidobot/BetterJoyForCemu
  13  *   hid-wiimote kernel hid driver
  14  *   hid-logitech-hidpp driver
  15  *   hid-sony driver
  16  *
  17  * This driver supports the Nintendo Switch Joy-Cons and Pro Controllers. The
  18  * Pro Controllers can either be used over USB or Bluetooth.
  19  *
  20  * The driver will retrieve the factory calibration info from the controllers,
  21  * so little to no user calibration should be required.
  22  *
  23  */
  24
  25 #include "hid-ids.h"
  26 #include <asm/unaligned.h>
  27 #include <linux/delay.h>
  28 #include <linux/device.h>
  29 #include <linux/kernel.h>
  30 #include <linux/hid.h>
  31 #include <linux/input.h>
  32 #include <linux/jiffies.h>
  33 #include <linux/leds.h>
  34 #include <linux/module.h>
  35 #include <linux/power_supply.h>
  36 #include <linux/spinlock.h>
  37
  38 /*
  39  * Reference the url below for the following HID report defines:
  40  * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
  41  */
  42
  43 /* Output Reports */
  44 #define JC_OUTPUT_RUMBLE_AND_SUBCMD      0x01
  45 #define JC_OUTPUT_FW_UPDATE_PKT          0x03
  46 #define JC_OUTPUT_RUMBLE_ONLY            0x10
  47 #define JC_OUTPUT_MCU_DATA               0x11
  48 #define JC_OUTPUT_USB_CMD                0x80
  49
  50 /* Subcommand IDs */
  51 #define JC_SUBCMD_STATE                  0x00
  52 #define JC_SUBCMD_MANUAL_BT_PAIRING      0x01
  53 #define JC_SUBCMD_REQ_DEV_INFO           0x02
  54 #define JC_SUBCMD_SET_REPORT_MODE        0x03
  55 #define JC_SUBCMD_TRIGGERS_ELAPSED       0x04
  56 #define JC_SUBCMD_GET_PAGE_LIST_STATE    0x05
  57 #define JC_SUBCMD_SET_HCI_STATE          0x06
  58 #define JC_SUBCMD_RESET_PAIRING_INFO     0x07
  59 #define JC_SUBCMD_LOW_POWER_MODE         0x08
  60 #define JC_SUBCMD_SPI_FLASH_READ         0x10
  61 #define JC_SUBCMD_SPI_FLASH_WRITE        0x11
  62 #define JC_SUBCMD_RESET_MCU              0x20
  63 #define JC_SUBCMD_SET_MCU_CONFIG         0x21
  64 #define JC_SUBCMD_SET_MCU_STATE          0x22
  65 #define JC_SUBCMD_SET_PLAYER_LIGHTS      0x30
  66 #define JC_SUBCMD_GET_PLAYER_LIGHTS      0x31
  67 #define JC_SUBCMD_SET_HOME_LIGHT         0x38
  68 #define JC_SUBCMD_ENABLE_IMU             0x40
  69 #define JC_SUBCMD_SET_IMU_SENSITIVITY    0x41
  70 #define JC_SUBCMD_WRITE_IMU_REG          0x42
  71 #define JC_SUBCMD_READ_IMU_REG           0x43
  72 #define JC_SUBCMD_ENABLE_VIBRATION       0x48
  73 #define JC_SUBCMD_GET_REGULATED_VOLTAGE  0x50
  74
  75 /* Input Reports */
  76 #define JC_INPUT_BUTTON_EVENT            0x3F
  77 #define JC_INPUT_SUBCMD_REPLY            0x21
  78 #define JC_INPUT_IMU_DATA                0x30
  79 #define JC_INPUT_MCU_DATA                0x31
  80 #define JC_INPUT_USB_RESPONSE            0x81
  81
  82 /* Feature Reports */
  83 #define JC_FEATURE_LAST_SUBCMD           0x02
  84 #define JC_FEATURE_OTA_FW_UPGRADE        0x70
  85 #define JC_FEATURE_SETUP_MEM_READ        0x71
  86 #define JC_FEATURE_MEM_READ              0x72
  87 #define JC_FEATURE_ERASE_MEM_SECTOR      0x73
  88 #define JC_FEATURE_MEM_WRITE             0x74
  89 #define JC_FEATURE_LAUNCH                0x75
  90
  91 /* USB Commands */
  92 #define JC_USB_CMD_CONN_STATUS           0x01
  93 #define JC_USB_CMD_HANDSHAKE             0x02
  94 #define JC_USB_CMD_BAUDRATE_3M           0x03
  95 #define JC_USB_CMD_NO_TIMEOUT            0x04
  96 #define JC_USB_CMD_EN_TIMEOUT            0x05
  97 #define JC_USB_RESET                     0x06
  98 #define JC_USB_PRE_HANDSHAKE             0x91
  99 #define JC_USB_SEND_UART                 0x92
 100
 101 /* Magic value denoting presence of user calibration */
 102 #define JC_CAL_USR_MAGIC_0               0xB2
 103 #define JC_CAL_USR_MAGIC_1               0xA1
 104 #define JC_CAL_USR_MAGIC_SIZE            2
 105
 106 /* SPI storage addresses of user calibration data */
 107 #define JC_CAL_USR_LEFT_MAGIC_ADDR       0x8010
 108 #define JC_CAL_USR_LEFT_DATA_ADDR        0x8012
 109 #define JC_CAL_USR_LEFT_DATA_END         0x801A
 110 #define JC_CAL_USR_RIGHT_MAGIC_ADDR      0x801B
 111 #define JC_CAL_USR_RIGHT_DATA_ADDR       0x801D
 112 #define JC_CAL_STICK_DATA_SIZE \
 113         (JC_CAL_USR_LEFT_DATA_END - JC_CAL_USR_LEFT_DATA_ADDR + 1)
 114
 115 /* SPI storage addresses of factory calibration data */
 116 #define JC_CAL_FCT_DATA_LEFT_ADDR        0x603d
 117 #define JC_CAL_FCT_DATA_RIGHT_ADDR       0x6046
 118
 119 /* SPI storage addresses of IMU factory calibration data */
 120 #define JC_IMU_CAL_FCT_DATA_ADDR         0x6020
 121 #define JC_IMU_CAL_FCT_DATA_END  0x6037
 122 #define JC_IMU_CAL_DATA_SIZE \
 123         (JC_IMU_CAL_FCT_DATA_END - JC_IMU_CAL_FCT_DATA_ADDR + 1)
 124 /* SPI storage addresses of IMU user calibration data */
 125 #define JC_IMU_CAL_USR_MAGIC_ADDR        0x8026
 126 #define JC_IMU_CAL_USR_DATA_ADDR         0x8028
 127
 128 /* The raw analog joystick values will be mapped in terms of this magnitude */
 129 #define JC_MAX_STICK_MAG                 32767
 130 #define JC_STICK_FUZZ                    250
 131 #define JC_STICK_FLAT                    500
 132
 133 /* Hat values for pro controller's d-pad */
 134 #define JC_MAX_DPAD_MAG         1
 135 #define JC_DPAD_FUZZ            0
 136 #define JC_DPAD_FLAT            0
 137
 138 /* Under most circumstances IMU reports are pushed every 15ms; use as default */
 139 #define JC_IMU_DFLT_AVG_DELTA_MS        15
 140 /* How many samples to sum before calculating average IMU report delta */
 141 #define JC_IMU_SAMPLES_PER_DELTA_AVG    300
 142 /* Controls how many dropped IMU packets at once trigger a warning message */
 143 #define JC_IMU_DROPPED_PKT_WARNING      3
 144
 145 /*
 146  * The controller's accelerometer has a sensor resolution of 16bits and is
 147  * configured with a range of +-8000 milliGs. Therefore, the resolution can be
 148  * calculated thus: (2^16-1)/(8000 * 2) = 4.096 digits per milliG
 149  * Resolution per G (rather than per millliG): 4.096 * 1000 = 4096 digits per G
 150  * Alternatively: 1/4096 = .0002441 Gs per digit
 151  */
 152 #define JC_IMU_MAX_ACCEL_MAG            32767
 153 #define JC_IMU_ACCEL_RES_PER_G          4096
 154 #define JC_IMU_ACCEL_FUZZ               10
 155 #define JC_IMU_ACCEL_FLAT               0
 156
 157 /*
 158  * The controller's gyroscope has a sensor resolution of 16bits and is
 159  * configured with a range of +-2000 degrees/second.
 160  * Digits per dps: (2^16 -1)/(2000*2) = 16.38375
 161  * dps per digit: 16.38375E-1 = .0610
 162  *
 163  * STMicro recommends in the datasheet to add 15% to the dps/digit. This allows
 164  * the full sensitivity range to be saturated without clipping. This yields more
 165  * accurate results, so it's the technique this driver uses.
 166  * dps per digit (corrected): .0610 * 1.15 = .0702
 167  * digits per dps (corrected): .0702E-1 = 14.247
 168  *
 169  * Now, 14.247 truncating to 14 loses a lot of precision, so we rescale the
 170  * min/max range by 1000.
 171  */
 172 #define JC_IMU_PREC_RANGE_SCALE 1000
 173 /* Note: change mag and res_per_dps if prec_range_scale is ever altered */
 174 #define JC_IMU_MAX_GYRO_MAG             32767000 /* (2^16-1)*1000 */
 175 #define JC_IMU_GYRO_RES_PER_DPS         14247 /* (14.247*1000) */
 176 #define JC_IMU_GYRO_FUZZ                10
 177 #define JC_IMU_GYRO_FLAT                0
 178
 179 /* frequency/amplitude tables for rumble */
 180 struct joycon_rumble_freq_data {
 181         u16 high;
 182         u8 low;
 183         u16 freq; /* Hz*/
 184 };
 185
 186 struct joycon_rumble_amp_data {
 187         u8 high;
 188         u16 low;
 189         u16 amp;
 190 };
 191
 192 #if IS_ENABLED(CONFIG_NINTENDO_FF)
 193 /*
 194  * These tables are from
 195  * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering/blob/master/rumble_data_table.md
 196  */
 197 static const struct joycon_rumble_freq_data joycon_rumble_frequencies[] = {
 198         /* high, low, freq */
 199         { 0x0000, 0x01,   41 }, { 0x0000, 0x02,   42 }, { 0x0000, 0x03,   43 },
 200         { 0x0000, 0x04,   44 }, { 0x0000, 0x05,   45 }, { 0x0000, 0x06,   46 },
 201         { 0x0000, 0x07,   47 }, { 0x0000, 0x08,   48 }, { 0x0000, 0x09,   49 },
 202         { 0x0000, 0x0A,   50 }, { 0x0000, 0x0B,   51 }, { 0x0000, 0x0C,   52 },
 203         { 0x0000, 0x0D,   53 }, { 0x0000, 0x0E,   54 }, { 0x0000, 0x0F,   55 },
 204         { 0x0000, 0x10,   57 }, { 0x0000, 0x11,   58 }, { 0x0000, 0x12,   59 },
 205         { 0x0000, 0x13,   60 }, { 0x0000, 0x14,   62 }, { 0x0000, 0x15,   63 },
 206         { 0x0000, 0x16,   64 }, { 0x0000, 0x17,   66 }, { 0x0000, 0x18,   67 },
 207         { 0x0000, 0x19,   69 }, { 0x0000, 0x1A,   70 }, { 0x0000, 0x1B,   72 },
 208         { 0x0000, 0x1C,   73 }, { 0x0000, 0x1D,   75 }, { 0x0000, 0x1e,   77 },
 209         { 0x0000, 0x1f,   78 }, { 0x0000, 0x20,   80 }, { 0x0400, 0x21,   82 },
 210         { 0x0800, 0x22,   84 }, { 0x0c00, 0x23,   85 }, { 0x1000, 0x24,   87 },
 211         { 0x1400, 0x25,   89 }, { 0x1800, 0x26,   91 }, { 0x1c00, 0x27,   93 },
 212         { 0x2000, 0x28,   95 }, { 0x2400, 0x29,   97 }, { 0x2800, 0x2a,   99 },
 213         { 0x2c00, 0x2b,  102 }, { 0x3000, 0x2c,  104 }, { 0x3400, 0x2d,  106 },
 214         { 0x3800, 0x2e,  108 }, { 0x3c00, 0x2f,  111 }, { 0x4000, 0x30,  113 },
 215         { 0x4400, 0x31,  116 }, { 0x4800, 0x32,  118 }, { 0x4c00, 0x33,  121 },
 216         { 0x5000, 0x34,  123 }, { 0x5400, 0x35,  126 }, { 0x5800, 0x36,  129 },
 217         { 0x5c00, 0x37,  132 }, { 0x6000, 0x38,  135 }, { 0x6400, 0x39,  137 },
 218         { 0x6800, 0x3a,  141 }, { 0x6c00, 0x3b,  144 }, { 0x7000, 0x3c,  147 },
 219         { 0x7400, 0x3d,  150 }, { 0x7800, 0x3e,  153 }, { 0x7c00, 0x3f,  157 },
 220         { 0x8000, 0x40,  160 }, { 0x8400, 0x41,  164 }, { 0x8800, 0x42,  167 },
 221         { 0x8c00, 0x43,  171 }, { 0x9000, 0x44,  174 }, { 0x9400, 0x45,  178 },
 222         { 0x9800, 0x46,  182 }, { 0x9c00, 0x47,  186 }, { 0xa000, 0x48,  190 },
 223         { 0xa400, 0x49,  194 }, { 0xa800, 0x4a,  199 }, { 0xac00, 0x4b,  203 },
 224         { 0xb000, 0x4c,  207 }, { 0xb400, 0x4d,  212 }, { 0xb800, 0x4e,  217 },
 225         { 0xbc00, 0x4f,  221 }, { 0xc000, 0x50,  226 }, { 0xc400, 0x51,  231 },
 226         { 0xc800, 0x52,  236 }, { 0xcc00, 0x53,  241 }, { 0xd000, 0x54,  247 },
 227         { 0xd400, 0x55,  252 }, { 0xd800, 0x56,  258 }, { 0xdc00, 0x57,  263 },
 228         { 0xe000, 0x58,  269 }, { 0xe400, 0x59,  275 }, { 0xe800, 0x5a,  281 },
 229         { 0xec00, 0x5b,  287 }, { 0xf000, 0x5c,  293 }, { 0xf400, 0x5d,  300 },
 230         { 0xf800, 0x5e,  306 }, { 0xfc00, 0x5f,  313 }, { 0x0001, 0x60,  320 },
 231         { 0x0401, 0x61,  327 }, { 0x0801, 0x62,  334 }, { 0x0c01, 0x63,  341 },
 232         { 0x1001, 0x64,  349 }, { 0x1401, 0x65,  357 }, { 0x1801, 0x66,  364 },
 233         { 0x1c01, 0x67,  372 }, { 0x2001, 0x68,  381 }, { 0x2401, 0x69,  389 },
 234         { 0x2801, 0x6a,  397 }, { 0x2c01, 0x6b,  406 }, { 0x3001, 0x6c,  415 },
 235         { 0x3401, 0x6d,  424 }, { 0x3801, 0x6e,  433 }, { 0x3c01, 0x6f,  443 },
 236         { 0x4001, 0x70,  453 }, { 0x4401, 0x71,  462 }, { 0x4801, 0x72,  473 },
 237         { 0x4c01, 0x73,  483 }, { 0x5001, 0x74,  494 }, { 0x5401, 0x75,  504 },
 238         { 0x5801, 0x76,  515 }, { 0x5c01, 0x77,  527 }, { 0x6001, 0x78,  538 },
 239         { 0x6401, 0x79,  550 }, { 0x6801, 0x7a,  562 }, { 0x6c01, 0x7b,  574 },
 240         { 0x7001, 0x7c,  587 }, { 0x7401, 0x7d,  600 }, { 0x7801, 0x7e,  613 },
 241         { 0x7c01, 0x7f,  626 }, { 0x8001, 0x00,  640 }, { 0x8401, 0x00,  654 },
 242         { 0x8801, 0x00,  668 }, { 0x8c01, 0x00,  683 }, { 0x9001, 0x00,  698 },
 243         { 0x9401, 0x00,  713 }, { 0x9801, 0x00,  729 }, { 0x9c01, 0x00,  745 },
 244         { 0xa001, 0x00,  761 }, { 0xa401, 0x00,  778 }, { 0xa801, 0x00,  795 },
 245         { 0xac01, 0x00,  812 }, { 0xb001, 0x00,  830 }, { 0xb401, 0x00,  848 },
 246         { 0xb801, 0x00,  867 }, { 0xbc01, 0x00,  886 }, { 0xc001, 0x00,  905 },
 247         { 0xc401, 0x00,  925 }, { 0xc801, 0x00,  945 }, { 0xcc01, 0x00,  966 },
 248         { 0xd001, 0x00,  987 }, { 0xd401, 0x00, 1009 }, { 0xd801, 0x00, 1031 },
 249         { 0xdc01, 0x00, 1053 }, { 0xe001, 0x00, 1076 }, { 0xe401, 0x00, 1100 },
 250         { 0xe801, 0x00, 1124 }, { 0xec01, 0x00, 1149 }, { 0xf001, 0x00, 1174 },
 251         { 0xf401, 0x00, 1199 }, { 0xf801, 0x00, 1226 }, { 0xfc01, 0x00, 1253 }
 252 };
 253
 254 #define joycon_max_rumble_amp   (1003)
 255 static const struct joycon_rumble_amp_data joycon_rumble_amplitudes[] = {
 256         /* high, low, amp */
 257         { 0x00, 0x0040,    0 },
 258         { 0x02, 0x8040,   10 }, { 0x04, 0x0041,   12 }, { 0x06, 0x8041,   14 },
 259         { 0x08, 0x0042,   17 }, { 0x0a, 0x8042,   20 }, { 0x0c, 0x0043,   24 },
 260         { 0x0e, 0x8043,   28 }, { 0x10, 0x0044,   33 }, { 0x12, 0x8044,   40 },
 261         { 0x14, 0x0045,   47 }, { 0x16, 0x8045,   56 }, { 0x18, 0x0046,   67 },
 262         { 0x1a, 0x8046,   80 }, { 0x1c, 0x0047,   95 }, { 0x1e, 0x8047,  112 },
 263         { 0x20, 0x0048,  117 }, { 0x22, 0x8048,  123 }, { 0x24, 0x0049,  128 },
 264         { 0x26, 0x8049,  134 }, { 0x28, 0x004a,  140 }, { 0x2a, 0x804a,  146 },
 265         { 0x2c, 0x004b,  152 }, { 0x2e, 0x804b,  159 }, { 0x30, 0x004c,  166 },
 266         { 0x32, 0x804c,  173 }, { 0x34, 0x004d,  181 }, { 0x36, 0x804d,  189 },
 267         { 0x38, 0x004e,  198 }, { 0x3a, 0x804e,  206 }, { 0x3c, 0x004f,  215 },
 268         { 0x3e, 0x804f,  225 }, { 0x40, 0x0050,  230 }, { 0x42, 0x8050,  235 },
 269         { 0x44, 0x0051,  240 }, { 0x46, 0x8051,  245 }, { 0x48, 0x0052,  251 },
 270         { 0x4a, 0x8052,  256 }, { 0x4c, 0x0053,  262 }, { 0x4e, 0x8053,  268 },
 271         { 0x50, 0x0054,  273 }, { 0x52, 0x8054,  279 }, { 0x54, 0x0055,  286 },
 272         { 0x56, 0x8055,  292 }, { 0x58, 0x0056,  298 }, { 0x5a, 0x8056,  305 },
 273         { 0x5c, 0x0057,  311 }, { 0x5e, 0x8057,  318 }, { 0x60, 0x0058,  325 },
 274         { 0x62, 0x8058,  332 }, { 0x64, 0x0059,  340 }, { 0x66, 0x8059,  347 },
 275         { 0x68, 0x005a,  355 }, { 0x6a, 0x805a,  362 }, { 0x6c, 0x005b,  370 },
 276         { 0x6e, 0x805b,  378 }, { 0x70, 0x005c,  387 }, { 0x72, 0x805c,  395 },
 277         { 0x74, 0x005d,  404 }, { 0x76, 0x805d,  413 }, { 0x78, 0x005e,  422 },
 278         { 0x7a, 0x805e,  431 }, { 0x7c, 0x005f,  440 }, { 0x7e, 0x805f,  450 },
 279         { 0x80, 0x0060,  460 }, { 0x82, 0x8060,  470 }, { 0x84, 0x0061,  480 },
 280         { 0x86, 0x8061,  491 }, { 0x88, 0x0062,  501 }, { 0x8a, 0x8062,  512 },
 281         { 0x8c, 0x0063,  524 }, { 0x8e, 0x8063,  535 }, { 0x90, 0x0064,  547 },
 282         { 0x92, 0x8064,  559 }, { 0x94, 0x0065,  571 }, { 0x96, 0x8065,  584 },
 283         { 0x98, 0x0066,  596 }, { 0x9a, 0x8066,  609 }, { 0x9c, 0x0067,  623 },
 284         { 0x9e, 0x8067,  636 }, { 0xa0, 0x0068,  650 }, { 0xa2, 0x8068,  665 },
 285         { 0xa4, 0x0069,  679 }, { 0xa6, 0x8069,  694 }, { 0xa8, 0x006a,  709 },
 286         { 0xaa, 0x806a,  725 }, { 0xac, 0x006b,  741 }, { 0xae, 0x806b,  757 },
 287         { 0xb0, 0x006c,  773 }, { 0xb2, 0x806c,  790 }, { 0xb4, 0x006d,  808 },
 288         { 0xb6, 0x806d,  825 }, { 0xb8, 0x006e,  843 }, { 0xba, 0x806e,  862 },
 289         { 0xbc, 0x006f,  881 }, { 0xbe, 0x806f,  900 }, { 0xc0, 0x0070,  920 },
 290         { 0xc2, 0x8070,  940 }, { 0xc4, 0x0071,  960 }, { 0xc6, 0x8071,  981 },
 291         { 0xc8, 0x0072, joycon_max_rumble_amp }
 292 };
 293 static const u16 JC_RUMBLE_DFLT_LOW_FREQ = 160;
 294 static const u16 JC_RUMBLE_DFLT_HIGH_FREQ = 320;
 295 static const unsigned short JC_RUMBLE_ZERO_AMP_PKT_CNT = 5;
 296 #endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */
 297 static const u16 JC_RUMBLE_PERIOD_MS = 50;
 298
 299 /* States for controller state machine */
 300 enum joycon_ctlr_state {
 301         JOYCON_CTLR_STATE_INIT,
 302         JOYCON_CTLR_STATE_READ,
 303         JOYCON_CTLR_STATE_REMOVED,
 304 };
 305
 306 /* Controller type received as part of device info */
 307 enum joycon_ctlr_type {
 308         JOYCON_CTLR_TYPE_JCL = 0x01,
 309         JOYCON_CTLR_TYPE_JCR = 0x02,
 310         JOYCON_CTLR_TYPE_PRO = 0x03,
 311 };
 312
 313 struct joycon_stick_cal {
 314         s32 max;
 315         s32 min;
 316         s32 center;
 317 };
 318
 319 struct joycon_imu_cal {
 320         s16 offset[3];
 321         s16 scale[3];
 322 };
 323
 324 /*
 325  * All the controller's button values are stored in a u32.
 326  * They can be accessed with bitwise ANDs.
 327  */
 328 static const u32 JC_BTN_Y       = BIT(0);
 329 static const u32 JC_BTN_X       = BIT(1);
 330 static const u32 JC_BTN_B       = BIT(2);
 331 static const u32 JC_BTN_A       = BIT(3);
 332 static const u32 JC_BTN_SR_R    = BIT(4);
 333 static const u32 JC_BTN_SL_R    = BIT(5);
 334 static const u32 JC_BTN_R       = BIT(6);
 335 static const u32 JC_BTN_ZR      = BIT(7);
 336 static const u32 JC_BTN_MINUS   = BIT(8);
 337 static const u32 JC_BTN_PLUS    = BIT(9);
 338 static const u32 JC_BTN_RSTICK  = BIT(10);
 339 static const u32 JC_BTN_LSTICK  = BIT(11);
 340 static const u32 JC_BTN_HOME    = BIT(12);
 341 static const u32 JC_BTN_CAP     = BIT(13); /* capture button */
 342 static const u32 JC_BTN_DOWN    = BIT(16);
 343 static const u32 JC_BTN_UP      = BIT(17);
 344 static const u32 JC_BTN_RIGHT   = BIT(18);
 345 static const u32 JC_BTN_LEFT    = BIT(19);
 346 static const u32 JC_BTN_SR_L    = BIT(20);
 347 static const u32 JC_BTN_SL_L    = BIT(21);
 348 static const u32 JC_BTN_L       = BIT(22);
 349 static const u32 JC_BTN_ZL      = BIT(23);
 350
 351 enum joycon_msg_type {
 352         JOYCON_MSG_TYPE_NONE,
 353         JOYCON_MSG_TYPE_USB,
 354         JOYCON_MSG_TYPE_SUBCMD,
 355 };
 356
 357 struct joycon_rumble_output {
 358         u8 output_id;
 359         u8 packet_num;
 360         u8 rumble_data[8];
 361 } __packed;
 362
 363 struct joycon_subcmd_request {
 364         u8 output_id; /* must be 0x01 for subcommand, 0x10 for rumble only */
 365         u8 packet_num; /* incremented every send */
 366         u8 rumble_data[8];
 367         u8 subcmd_id;
 368         u8 data[]; /* length depends on the subcommand */
 369 } __packed;
 370
 371 struct joycon_subcmd_reply {
 372         u8 ack; /* MSB 1 for ACK, 0 for NACK */
 373         u8 id; /* id of requested subcmd */
 374         u8 data[]; /* will be at most 35 bytes */
 375 } __packed;
 376
 377 struct joycon_imu_data {
 378         s16 accel_x;
 379         s16 accel_y;
 380         s16 accel_z;
 381         s16 gyro_x;
 382         s16 gyro_y;
 383         s16 gyro_z;
 384 } __packed;
 385
 386 struct joycon_input_report {
 387         u8 id;
 388         u8 timer;
 389         u8 bat_con; /* battery and connection info */
 390         u8 button_status[3];
 391         u8 left_stick[3];
 392         u8 right_stick[3];
 393         u8 vibrator_report;
 394
 395         union {
 396                 struct joycon_subcmd_reply subcmd_reply;
 397                 /* IMU input reports contain 3 samples */
 398                 u8 imu_raw_bytes[sizeof(struct joycon_imu_data) * 3];
 399         };
 400 } __packed;
 401
 402 #define JC_MAX_RESP_SIZE        (sizeof(struct joycon_input_report) + 35)
 403 #define JC_RUMBLE_DATA_SIZE     8
 404 #define JC_RUMBLE_QUEUE_SIZE    8
 405
 406 static const char * const joycon_player_led_names[] = {
 407         LED_FUNCTION_PLAYER1,
 408         LED_FUNCTION_PLAYER2,
 409         LED_FUNCTION_PLAYER3,
 410         LED_FUNCTION_PLAYER4,
 411 };
 412 #define JC_NUM_LEDS             ARRAY_SIZE(joycon_player_led_names)
 413
 414 /* Each physical controller is associated with a joycon_ctlr struct */
 415 struct joycon_ctlr {
 416         struct hid_device *hdev;
 417         struct input_dev *input;
 418         struct led_classdev leds[JC_NUM_LEDS]; /* player leds */
 419         struct led_classdev home_led;
 420         enum joycon_ctlr_state ctlr_state;
 421         spinlock_t lock;
 422         u8 mac_addr[6];
 423         char *mac_addr_str;
 424         enum joycon_ctlr_type ctlr_type;
 425
 426         /* The following members are used for synchronous sends/receives */
 427         enum joycon_msg_type msg_type;
 428         u8 subcmd_num;
 429         struct mutex output_mutex;
 430         u8 input_buf[JC_MAX_RESP_SIZE];
 431         wait_queue_head_t wait;
 432         bool received_resp;
 433         u8 usb_ack_match;
 434         u8 subcmd_ack_match;
 435         bool received_input_report;
 436         unsigned int last_subcmd_sent_msecs;
 437
 438         /* factory calibration data */
 439         struct joycon_stick_cal left_stick_cal_x;
 440         struct joycon_stick_cal left_stick_cal_y;
 441         struct joycon_stick_cal right_stick_cal_x;
 442         struct joycon_stick_cal right_stick_cal_y;
 443
 444         struct joycon_imu_cal accel_cal;
 445         struct joycon_imu_cal gyro_cal;
 446
 447         /* prevents needlessly recalculating these divisors every sample */
 448         s32 imu_cal_accel_divisor[3];
 449         s32 imu_cal_gyro_divisor[3];
 450
 451         /* power supply data */
 452         struct power_supply *battery;
 453         struct power_supply_desc battery_desc;
 454         u8 battery_capacity;
 455         bool battery_charging;
 456         bool host_powered;
 457
 458         /* rumble */
 459         u8 rumble_data[JC_RUMBLE_QUEUE_SIZE][JC_RUMBLE_DATA_SIZE];
 460         int rumble_queue_head;
 461         int rumble_queue_tail;
 462         struct workqueue_struct *rumble_queue;
 463         struct work_struct rumble_worker;
 464         unsigned int rumble_msecs;
 465         u16 rumble_ll_freq;
 466         u16 rumble_lh_freq;
 467         u16 rumble_rl_freq;
 468         u16 rumble_rh_freq;
 469         unsigned short rumble_zero_countdown;
 470
 471         /* imu */
 472         struct input_dev *imu_input;
 473         bool imu_first_packet_received; /* helps in initiating timestamp */
 474         unsigned int imu_timestamp_us; /* timestamp we report to userspace */
 475         unsigned int imu_last_pkt_ms; /* used to calc imu report delta */
 476         /* the following are used to track the average imu report time delta */
 477         unsigned int imu_delta_samples_count;
 478         unsigned int imu_delta_samples_sum;
 479         unsigned int imu_avg_delta_ms;
 480 };
 481
 482 /* Helper macros for checking controller type */
 483 #define jc_type_is_joycon(ctlr) \
 484         (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL || \
 485          ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR || \
 486          ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP)
 487 #define jc_type_is_procon(ctlr) \
 488         (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_PROCON)
 489 #define jc_type_is_chrggrip(ctlr) \
 490         (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP)
 491
 492 /* Does this controller have inputs associated with left joycon? */
 493 #define jc_type_has_left(ctlr) \
 494         (ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCL || \
 495          ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO)
 496
 497 /* Does this controller have inputs associated with right joycon? */
 498 #define jc_type_has_right(ctlr) \
 499         (ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCR || \
 500          ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO)
 501
 502 static int __joycon_hid_send(struct hid_device *hdev, u8 *data, size_t len)
 503 {
 504         u8 *buf;
 505         int ret;
 506
 507         buf = kmemdup(data, len, GFP_KERNEL);
 508         if (!buf)
 509                 return -ENOMEM;
 510         ret = hid_hw_output_report(hdev, buf, len);
 511         kfree(buf);
 512         if (ret < 0)
 513                 hid_dbg(hdev, "Failed to send output report ret=%d\n", ret);
 514         return ret;
 515 }
 516
 517 static void joycon_wait_for_input_report(struct joycon_ctlr *ctlr)
 518 {
 519         int ret;
 520
 521         /*
 522          * If we are in the proper reporting mode, wait for an input
 523          * report prior to sending the subcommand. This improves
 524          * reliability considerably.
 525          */
 526         if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) {
 527                 unsigned long flags;
 528
 529                 spin_lock_irqsave(&ctlr->lock, flags);
 530                 ctlr->received_input_report = false;
 531                 spin_unlock_irqrestore(&ctlr->lock, flags);
 532                 ret = wait_event_timeout(ctlr->wait,
 533                                          ctlr->received_input_report,
 534                                          HZ / 4);
 535                 /* We will still proceed, even with a timeout here */
 536                 if (!ret)
 537                         hid_warn(ctlr->hdev,
 538                                  "timeout waiting for input report\n");
 539         }
 540 }
 541
 542 /*
 543  * Sending subcommands and/or rumble data at too high a rate can cause bluetooth
 544  * controller disconnections.
 545  */
 546 static void joycon_enforce_subcmd_rate(struct joycon_ctlr *ctlr)
 547 {
 548         static const unsigned int max_subcmd_rate_ms = 25;
 549         unsigned int current_ms = jiffies_to_msecs(jiffies);
 550         unsigned int delta_ms = current_ms - ctlr->last_subcmd_sent_msecs;
 551
 552         while (delta_ms < max_subcmd_rate_ms &&
 553                ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) {
 554                 joycon_wait_for_input_report(ctlr);
 555                 current_ms = jiffies_to_msecs(jiffies);
 556                 delta_ms = current_ms - ctlr->last_subcmd_sent_msecs;
 557         }
 558         ctlr->last_subcmd_sent_msecs = current_ms;
 559 }
 560
 561 static int joycon_hid_send_sync(struct joycon_ctlr *ctlr, u8 *data, size_t len,
 562                                 u32 timeout)
 563 {
 564         int ret;
 565         int tries = 2;
 566
 567         /*
 568          * The controller occasionally seems to drop subcommands. In testing,
 569          * doing one retry after a timeout appears to always work.
 570          */
 571         while (tries--) {
 572                 joycon_enforce_subcmd_rate(ctlr);
 573
 574                 ret = __joycon_hid_send(ctlr->hdev, data, len);
 575                 if (ret < 0) {
 576                         memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
 577                         return ret;
 578                 }
 579
 580                 ret = wait_event_timeout(ctlr->wait, ctlr->received_resp,
 581                                          timeout);
 582                 if (!ret) {
 583                         hid_dbg(ctlr->hdev,
 584                                 "synchronous send/receive timed out\n");
 585                         if (tries) {
 586                                 hid_dbg(ctlr->hdev,
 587                                         "retrying sync send after timeout\n");
 588                         }
 589                         memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
 590                         ret = -ETIMEDOUT;
 591                 } else {
 592                         ret = 0;
 593                         break;
 594                 }
 595         }
 596
 597         ctlr->received_resp = false;
 598         return ret;
 599 }
 600
 601 static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd, u32 timeout)
 602 {
 603         int ret;
 604         u8 buf[2] = {JC_OUTPUT_USB_CMD};
 605
 606         buf[1] = cmd;
 607         ctlr->usb_ack_match = cmd;
 608         ctlr->msg_type = JOYCON_MSG_TYPE_USB;
 609         ret = joycon_hid_send_sync(ctlr, buf, sizeof(buf), timeout);
 610         if (ret)
 611                 hid_dbg(ctlr->hdev, "send usb command failed; ret=%d\n", ret);
 612         return ret;
 613 }
 614
 615 static int joycon_send_subcmd(struct joycon_ctlr *ctlr,
 616                               struct joycon_subcmd_request *subcmd,
 617                               size_t data_len, u32 timeout)
 618 {
 619         int ret;
 620         unsigned long flags;
 621
 622         spin_lock_irqsave(&ctlr->lock, flags);
 623         /*
 624          * If the controller has been removed, just return ENODEV so the LED
 625          * subsystem doesn't print invalid errors on removal.
 626          */
 627         if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) {
 628                 spin_unlock_irqrestore(&ctlr->lock, flags);
 629                 return -ENODEV;
 630         }
 631         memcpy(subcmd->rumble_data, ctlr->rumble_data[ctlr->rumble_queue_tail],
 632                JC_RUMBLE_DATA_SIZE);
 633         spin_unlock_irqrestore(&ctlr->lock, flags);
 634
 635         subcmd->output_id = JC_OUTPUT_RUMBLE_AND_SUBCMD;
 636         subcmd->packet_num = ctlr->subcmd_num;
 637         if (++ctlr->subcmd_num > 0xF)
 638                 ctlr->subcmd_num = 0;
 639         ctlr->subcmd_ack_match = subcmd->subcmd_id;
 640         ctlr->msg_type = JOYCON_MSG_TYPE_SUBCMD;
 641
 642         ret = joycon_hid_send_sync(ctlr, (u8 *)subcmd,
 643                                    sizeof(*subcmd) + data_len, timeout);
 644         if (ret < 0)
 645                 hid_dbg(ctlr->hdev, "send subcommand failed; ret=%d\n", ret);
 646         else
 647                 ret = 0;
 648         return ret;
 649 }
 650
 651 /* Supply nibbles for flash and on. Ones correspond to active */
 652 static int joycon_set_player_leds(struct joycon_ctlr *ctlr, u8 flash, u8 on)
 653 {
 654         struct joycon_subcmd_request *req;
 655         u8 buffer[sizeof(*req) + 1] = { 0 };
 656
 657         req = (struct joycon_subcmd_request *)buffer;
 658         req->subcmd_id = JC_SUBCMD_SET_PLAYER_LIGHTS;
 659         req->data[0] = (flash << 4) | on;
 660
 661         hid_dbg(ctlr->hdev, "setting player leds\n");
 662         return joycon_send_subcmd(ctlr, req, 1, HZ/4);
 663 }
 664
 665 static int joycon_request_spi_flash_read(struct joycon_ctlr *ctlr,
 666                                          u32 start_addr, u8 size, u8 **reply)
 667 {
 668         struct joycon_subcmd_request *req;
 669         struct joycon_input_report *report;
 670         u8 buffer[sizeof(*req) + 5] = { 0 };
 671         u8 *data;
 672         int ret;
 673
 674         if (!reply)
 675                 return -EINVAL;
 676
 677         req = (struct joycon_subcmd_request *)buffer;
 678         req->subcmd_id = JC_SUBCMD_SPI_FLASH_READ;
 679         data = req->data;
 680         put_unaligned_le32(start_addr, data);
 681         data[4] = size;
 682
 683         hid_dbg(ctlr->hdev, "requesting SPI flash data\n");
 684         ret = joycon_send_subcmd(ctlr, req, 5, HZ);
 685         if (ret) {
 686                 hid_err(ctlr->hdev, "failed reading SPI flash; ret=%d\n", ret);
 687         } else {
 688                 report = (struct joycon_input_report *)ctlr->input_buf;
 689                 /* The read data starts at the 6th byte */
 690                 *reply = &report->subcmd_reply.data[5];
 691         }
 692         return ret;
 693 }
 694
 695 /*
 696  * User calibration's presence is denoted with a magic byte preceding it.
 697  * returns 0 if magic val is present, 1 if not present, < 0 on error
 698  */
 699 static int joycon_check_for_cal_magic(struct joycon_ctlr *ctlr, u32 flash_addr)
 700 {
 701         int ret;
 702         u8 *reply;
 703
 704         ret = joycon_request_spi_flash_read(ctlr, flash_addr,
 705                                             JC_CAL_USR_MAGIC_SIZE, &reply);
 706         if (ret)
 707                 return ret;
 708
 709         return reply[0] != JC_CAL_USR_MAGIC_0 || reply[1] != JC_CAL_USR_MAGIC_1;
 710 }
 711
 712 static int joycon_read_stick_calibration(struct joycon_ctlr *ctlr, u16 cal_addr,
 713                                          struct joycon_stick_cal *cal_x,
 714                                          struct joycon_stick_cal *cal_y,
 715                                          bool left_stick)
 716 {
 717         s32 x_max_above;
 718         s32 x_min_below;
 719         s32 y_max_above;
 720         s32 y_min_below;
 721         u8 *raw_cal;
 722         int ret;
 723
 724         ret = joycon_request_spi_flash_read(ctlr, cal_addr,
 725                                             JC_CAL_STICK_DATA_SIZE, &raw_cal);
 726         if (ret)
 727                 return ret;
 728
 729         /* stick calibration parsing: note the order differs based on stick */
 730         if (left_stick) {
 731                 x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0,
 732                                                 12);
 733                 y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4,
 734                                                 12);
 735                 cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0,
 736                                                   12);
 737                 cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4,
 738                                                   12);
 739                 x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0,
 740                                                 12);
 741                 y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4,
 742                                                 12);
 743         } else {
 744                 cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0,
 745                                                   12);
 746                 cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4,
 747                                                   12);
 748                 x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0,
 749                                                 12);
 750                 y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4,
 751                                                 12);
 752                 x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0,
 753                                                 12);
 754                 y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4,
 755                                                 12);
 756         }
 757
 758         cal_x->max = cal_x->center + x_max_above;
 759         cal_x->min = cal_x->center - x_min_below;
 760         cal_y->max = cal_y->center + y_max_above;
 761         cal_y->min = cal_y->center - y_min_below;
 762
 763         return 0;
 764 }
 765
 766 static const u16 DFLT_STICK_CAL_CEN = 2000;
 767 static const u16 DFLT_STICK_CAL_MAX = 3500;
 768 static const u16 DFLT_STICK_CAL_MIN = 500;
 769 static int joycon_request_calibration(struct joycon_ctlr *ctlr)
 770 {
 771         u16 left_stick_addr = JC_CAL_FCT_DATA_LEFT_ADDR;
 772         u16 right_stick_addr = JC_CAL_FCT_DATA_RIGHT_ADDR;
 773         int ret;
 774
 775         hid_dbg(ctlr->hdev, "requesting cal data\n");
 776
 777         /* check if user stick calibrations are present */
 778         if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_LEFT_MAGIC_ADDR)) {
 779                 left_stick_addr = JC_CAL_USR_LEFT_DATA_ADDR;
 780                 hid_info(ctlr->hdev, "using user cal for left stick\n");
 781         } else {
 782                 hid_info(ctlr->hdev, "using factory cal for left stick\n");
 783         }
 784         if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_RIGHT_MAGIC_ADDR)) {
 785                 right_stick_addr = JC_CAL_USR_RIGHT_DATA_ADDR;
 786                 hid_info(ctlr->hdev, "using user cal for right stick\n");
 787         } else {
 788                 hid_info(ctlr->hdev, "using factory cal for right stick\n");
 789         }
 790
 791         /* read the left stick calibration data */
 792         ret = joycon_read_stick_calibration(ctlr, left_stick_addr,
 793                                             &ctlr->left_stick_cal_x,
 794                                             &ctlr->left_stick_cal_y,
 795                                             true);
 796         if (ret) {
 797                 hid_warn(ctlr->hdev,
 798                          "Failed to read left stick cal, using dflts; e=%d\n",
 799                          ret);
 800
 801                 ctlr->left_stick_cal_x.center = DFLT_STICK_CAL_CEN;
 802                 ctlr->left_stick_cal_x.max = DFLT_STICK_CAL_MAX;
 803                 ctlr->left_stick_cal_x.min = DFLT_STICK_CAL_MIN;
 804
 805                 ctlr->left_stick_cal_y.center = DFLT_STICK_CAL_CEN;
 806                 ctlr->left_stick_cal_y.max = DFLT_STICK_CAL_MAX;
 807                 ctlr->left_stick_cal_y.min = DFLT_STICK_CAL_MIN;
 808         }
 809
 810         /* read the right stick calibration data */
 811         ret = joycon_read_stick_calibration(ctlr, right_stick_addr,
 812                                             &ctlr->right_stick_cal_x,
 813                                             &ctlr->right_stick_cal_y,
 814                                             false);
 815         if (ret) {
 816                 hid_warn(ctlr->hdev,
 817                          "Failed to read right stick cal, using dflts; e=%d\n",
 818                          ret);
 819
 820                 ctlr->right_stick_cal_x.center = DFLT_STICK_CAL_CEN;
 821                 ctlr->right_stick_cal_x.max = DFLT_STICK_CAL_MAX;
 822                 ctlr->right_stick_cal_x.min = DFLT_STICK_CAL_MIN;
 823
 824                 ctlr->right_stick_cal_y.center = DFLT_STICK_CAL_CEN;
 825                 ctlr->right_stick_cal_y.max = DFLT_STICK_CAL_MAX;
 826                 ctlr->right_stick_cal_y.min = DFLT_STICK_CAL_MIN;
 827         }
 828
 829         hid_dbg(ctlr->hdev, "calibration:\n"
 830                             "l_x_c=%d l_x_max=%d l_x_min=%d\n"
 831                             "l_y_c=%d l_y_max=%d l_y_min=%d\n"
 832                             "r_x_c=%d r_x_max=%d r_x_min=%d\n"
 833                             "r_y_c=%d r_y_max=%d r_y_min=%d\n",
 834                             ctlr->left_stick_cal_x.center,
 835                             ctlr->left_stick_cal_x.max,
 836                             ctlr->left_stick_cal_x.min,
 837                             ctlr->left_stick_cal_y.center,
 838                             ctlr->left_stick_cal_y.max,
 839                             ctlr->left_stick_cal_y.min,
 840                             ctlr->right_stick_cal_x.center,
 841                             ctlr->right_stick_cal_x.max,
 842                             ctlr->right_stick_cal_x.min,
 843                             ctlr->right_stick_cal_y.center,
 844                             ctlr->right_stick_cal_y.max,
 845                             ctlr->right_stick_cal_y.min);
 846
 847         return 0;
 848 }
 849
 850 /*
 851  * These divisors are calculated once rather than for each sample. They are only
 852  * dependent on the IMU calibration values. They are used when processing the
 853  * IMU input reports.
 854  */
 855 static void joycon_calc_imu_cal_divisors(struct joycon_ctlr *ctlr)
 856 {
 857         int i;
 858
 859         for (i = 0; i < 3; i++) {
 860                 ctlr->imu_cal_accel_divisor[i] = ctlr->accel_cal.scale[i] -
 861                                                 ctlr->accel_cal.offset[i];
 862                 ctlr->imu_cal_gyro_divisor[i] = ctlr->gyro_cal.scale[i] -
 863                                                 ctlr->gyro_cal.offset[i];
 864         }
 865 }
 866
 867 static const s16 DFLT_ACCEL_OFFSET /*= 0*/;
 868 static const s16 DFLT_ACCEL_SCALE = 16384;
 869 static const s16 DFLT_GYRO_OFFSET /*= 0*/;
 870 static const s16 DFLT_GYRO_SCALE  = 13371;
 871 static int joycon_request_imu_calibration(struct joycon_ctlr *ctlr)
 872 {
 873         u16 imu_cal_addr = JC_IMU_CAL_FCT_DATA_ADDR;
 874         u8 *raw_cal;
 875         int ret;
 876         int i;
 877
 878         /* check if user calibration exists */
 879         if (!joycon_check_for_cal_magic(ctlr, JC_IMU_CAL_USR_MAGIC_ADDR)) {
 880                 imu_cal_addr = JC_IMU_CAL_USR_DATA_ADDR;
 881                 hid_info(ctlr->hdev, "using user cal for IMU\n");
 882         } else {
 883                 hid_info(ctlr->hdev, "using factory cal for IMU\n");
 884         }
 885
 886         /* request IMU calibration data */
 887         hid_dbg(ctlr->hdev, "requesting IMU cal data\n");
 888         ret = joycon_request_spi_flash_read(ctlr, imu_cal_addr,
 889                                             JC_IMU_CAL_DATA_SIZE, &raw_cal);
 890         if (ret) {
 891                 hid_warn(ctlr->hdev,
 892                          "Failed to read IMU cal, using defaults; ret=%d\n",
 893                          ret);
 894
 895                 for (i = 0; i < 3; i++) {
 896                         ctlr->accel_cal.offset[i] = DFLT_ACCEL_OFFSET;
 897                         ctlr->accel_cal.scale[i] = DFLT_ACCEL_SCALE;
 898                         ctlr->gyro_cal.offset[i] = DFLT_GYRO_OFFSET;
 899                         ctlr->gyro_cal.scale[i] = DFLT_GYRO_SCALE;
 900                 }
 901                 joycon_calc_imu_cal_divisors(ctlr);
 902                 return ret;
 903         }
 904
 905         /* IMU calibration parsing */
 906         for (i = 0; i < 3; i++) {
 907                 int j = i * 2;
 908
 909                 ctlr->accel_cal.offset[i] = get_unaligned_le16(raw_cal + j);
 910                 ctlr->accel_cal.scale[i] = get_unaligned_le16(raw_cal + j + 6);
 911                 ctlr->gyro_cal.offset[i] = get_unaligned_le16(raw_cal + j + 12);
 912                 ctlr->gyro_cal.scale[i] = get_unaligned_le16(raw_cal + j + 18);
 913         }
 914
 915         joycon_calc_imu_cal_divisors(ctlr);
 916
 917         hid_dbg(ctlr->hdev, "IMU calibration:\n"
 918                             "a_o[0]=%d a_o[1]=%d a_o[2]=%d\n"
 919                             "a_s[0]=%d a_s[1]=%d a_s[2]=%d\n"
 920                             "g_o[0]=%d g_o[1]=%d g_o[2]=%d\n"
 921                             "g_s[0]=%d g_s[1]=%d g_s[2]=%d\n",
 922                             ctlr->accel_cal.offset[0],
 923                             ctlr->accel_cal.offset[1],
 924                             ctlr->accel_cal.offset[2],
 925                             ctlr->accel_cal.scale[0],
 926                             ctlr->accel_cal.scale[1],
 927                             ctlr->accel_cal.scale[2],
 928                             ctlr->gyro_cal.offset[0],
 929                             ctlr->gyro_cal.offset[1],
 930                             ctlr->gyro_cal.offset[2],
 931                             ctlr->gyro_cal.scale[0],
 932                             ctlr->gyro_cal.scale[1],
 933                             ctlr->gyro_cal.scale[2]);
 934
 935         return 0;
 936 }
 937
 938 static int joycon_set_report_mode(struct joycon_ctlr *ctlr)
 939 {
 940         struct joycon_subcmd_request *req;
 941         u8 buffer[sizeof(*req) + 1] = { 0 };
 942
 943         req = (struct joycon_subcmd_request *)buffer;
 944         req->subcmd_id = JC_SUBCMD_SET_REPORT_MODE;
 945         req->data[0] = 0x30; /* standard, full report mode */
 946
 947         hid_dbg(ctlr->hdev, "setting controller report mode\n");
 948         return joycon_send_subcmd(ctlr, req, 1, HZ);
 949 }
 950
 951 static int joycon_enable_rumble(struct joycon_ctlr *ctlr)
 952 {
 953         struct joycon_subcmd_request *req;
 954         u8 buffer[sizeof(*req) + 1] = { 0 };
 955
 956         req = (struct joycon_subcmd_request *)buffer;
 957         req->subcmd_id = JC_SUBCMD_ENABLE_VIBRATION;
 958         req->data[0] = 0x01; /* note: 0x00 would disable */
 959
 960         hid_dbg(ctlr->hdev, "enabling rumble\n");
 961         return joycon_send_subcmd(ctlr, req, 1, HZ/4);
 962 }
 963
 964 static int joycon_enable_imu(struct joycon_ctlr *ctlr)
 965 {
 966         struct joycon_subcmd_request *req;
 967         u8 buffer[sizeof(*req) + 1] = { 0 };
 968
 969         req = (struct joycon_subcmd_request *)buffer;
 970         req->subcmd_id = JC_SUBCMD_ENABLE_IMU;
 971         req->data[0] = 0x01; /* note: 0x00 would disable */
 972
 973         hid_dbg(ctlr->hdev, "enabling IMU\n");
 974         return joycon_send_subcmd(ctlr, req, 1, HZ);
 975 }
 976
 977 static s32 joycon_map_stick_val(struct joycon_stick_cal *cal, s32 val)
 978 {
 979         s32 center = cal->center;
 980         s32 min = cal->min;
 981         s32 max = cal->max;
 982         s32 new_val;
 983
 984         if (val > center) {
 985                 new_val = (val - center) * JC_MAX_STICK_MAG;
 986                 new_val /= (max - center);
 987         } else {
 988                 new_val = (center - val) * -JC_MAX_STICK_MAG;
 989                 new_val /= (center - min);
 990         }
 991         new_val = clamp(new_val, (s32)-JC_MAX_STICK_MAG, (s32)JC_MAX_STICK_MAG);
 992         return new_val;
 993 }
 994
 995 static void joycon_input_report_parse_imu_data(struct joycon_ctlr *ctlr,
 996                                                struct joycon_input_report *rep,
 997                                                struct joycon_imu_data *imu_data)
 998 {
 999         u8 *raw = rep->imu_raw_bytes;
1000         int i;
1001
1002         for (i = 0; i < 3; i++) {
1003                 struct joycon_imu_data *data = &imu_data[i];
1004
1005                 data->accel_x = get_unaligned_le16(raw + 0);
1006                 data->accel_y = get_unaligned_le16(raw + 2);
1007                 data->accel_z = get_unaligned_le16(raw + 4);
1008                 data->gyro_x = get_unaligned_le16(raw + 6);
1009                 data->gyro_y = get_unaligned_le16(raw + 8);
1010                 data->gyro_z = get_unaligned_le16(raw + 10);
1011                 /* point to next imu sample */
1012                 raw += sizeof(struct joycon_imu_data);
1013         }
1014 }
1015
1016 static void joycon_parse_imu_report(struct joycon_ctlr *ctlr,
1017                                     struct joycon_input_report *rep)
1018 {
1019         struct joycon_imu_data imu_data[3] = {0}; /* 3 reports per packet */
1020         struct input_dev *idev = ctlr->imu_input;
1021         unsigned int msecs = jiffies_to_msecs(jiffies);
1022         unsigned int last_msecs = ctlr->imu_last_pkt_ms;
1023         int i;
1024         int value[6];
1025
1026         joycon_input_report_parse_imu_data(ctlr, rep, imu_data);
1027
1028         /*
1029          * There are complexities surrounding how we determine the timestamps we
1030          * associate with the samples we pass to userspace. The IMU input
1031          * reports do not provide us with a good timestamp. There's a quickly
1032          * incrementing 8-bit counter per input report, but it is not very
1033          * useful for this purpose (it is not entirely clear what rate it
1034          * increments at or if it varies based on packet push rate - more on
1035          * the push rate below...).
1036          *
1037          * The reverse engineering work done on the joy-cons and pro controllers
1038          * by the community seems to indicate the following:
1039          * - The controller samples the IMU every 1.35ms. It then does some of
1040          *   its own processing, probably averaging the samples out.
1041          * - Each imu input report contains 3 IMU samples, (usually 5ms apart).
1042          * - In the standard reporting mode (which this driver uses exclusively)
1043          *   input reports are pushed from the controller as follows:
1044          *      * joy-con (bluetooth): every 15 ms
1045          *      * joy-cons (in charging grip via USB): every 15 ms
1046          *      * pro controller (USB): every 15 ms
1047          *      * pro controller (bluetooth): every 8 ms (this is the wildcard)
1048          *
1049          * Further complicating matters is that some bluetooth stacks are known
1050          * to alter the controller's packet rate by hardcoding the bluetooth
1051          * SSR for the switch controllers (android's stack currently sets the
1052          * SSR to 11ms for both the joy-cons and pro controllers).
1053          *
1054          * In my own testing, I've discovered that my pro controller either
1055          * reports IMU sample batches every 11ms or every 15ms. This rate is
1056          * stable after connecting. It isn't 100% clear what determines this
1057          * rate. Importantly, even when sending every 11ms, none of the samples
1058          * are duplicates. This seems to indicate that the time deltas between
1059          * reported samples can vary based on the input report rate.
1060          *
1061          * The solution employed in this driver is to keep track of the average
1062          * time delta between IMU input reports. In testing, this value has
1063          * proven to be stable, staying at 15ms or 11ms, though other hardware
1064          * configurations and bluetooth stacks could potentially see other rates
1065          * (hopefully this will become more clear as more people use the
1066          * driver).
1067          *
1068          * Keeping track of the average report delta allows us to submit our
1069          * timestamps to userspace based on that. Each report contains 3
1070          * samples, so the IMU sampling rate should be avg_time_delta/3. We can
1071          * also use this average to detect events where we have dropped a
1072          * packet. The userspace timestamp for the samples will be adjusted
1073          * accordingly to prevent unwanted behvaior.
1074          */
1075         if (!ctlr->imu_first_packet_received) {
1076                 ctlr->imu_timestamp_us = 0;
1077                 ctlr->imu_delta_samples_count = 0;
1078                 ctlr->imu_delta_samples_sum = 0;
1079                 ctlr->imu_avg_delta_ms = JC_IMU_DFLT_AVG_DELTA_MS;
1080                 ctlr->imu_first_packet_received = true;
1081         } else {
1082                 unsigned int delta = msecs - last_msecs;
1083                 unsigned int dropped_pkts;
1084                 unsigned int dropped_threshold;
1085
1086                 /* avg imu report delta housekeeping */
1087                 ctlr->imu_delta_samples_sum += delta;
1088                 ctlr->imu_delta_samples_count++;
1089                 if (ctlr->imu_delta_samples_count >=
1090                     JC_IMU_SAMPLES_PER_DELTA_AVG) {
1091                         ctlr->imu_avg_delta_ms = ctlr->imu_delta_samples_sum /
1092                                                  ctlr->imu_delta_samples_count;
1093                         /* don't ever want divide by zero shenanigans */
1094                         if (ctlr->imu_avg_delta_ms == 0) {
1095                                 ctlr->imu_avg_delta_ms = 1;
1096                                 hid_warn(ctlr->hdev,
1097                                          "calculated avg imu delta of 0\n");
1098                         }
1099                         ctlr->imu_delta_samples_count = 0;
1100                         ctlr->imu_delta_samples_sum = 0;
1101                 }
1102
1103                 /* useful for debugging IMU sample rate */
1104                 hid_dbg(ctlr->hdev,
1105                         "imu_report: ms=%u last_ms=%u delta=%u avg_delta=%u\n",
1106                         msecs, last_msecs, delta, ctlr->imu_avg_delta_ms);
1107
1108                 /* check if any packets have been dropped */
1109                 dropped_threshold = ctlr->imu_avg_delta_ms * 3 / 2;
1110                 dropped_pkts = (delta - min(delta, dropped_threshold)) /
1111                                 ctlr->imu_avg_delta_ms;
1112                 ctlr->imu_timestamp_us += 1000 * ctlr->imu_avg_delta_ms;
1113                 if (dropped_pkts > JC_IMU_DROPPED_PKT_WARNING) {
1114                         hid_warn(ctlr->hdev,
1115                                  "compensating for %u dropped IMU reports\n",
1116                                  dropped_pkts);
1117                         hid_warn(ctlr->hdev,
1118                                  "delta=%u avg_delta=%u\n",
1119                                  delta, ctlr->imu_avg_delta_ms);
1120                 }
1121         }
1122         ctlr->imu_last_pkt_ms = msecs;
1123
1124         /* Each IMU input report contains three samples */
1125         for (i = 0; i < 3; i++) {
1126                 input_event(idev, EV_MSC, MSC_TIMESTAMP,
1127                             ctlr->imu_timestamp_us);
1128
1129                 /*
1130                  * These calculations (which use the controller's calibration
1131                  * settings to improve the final values) are based on those
1132                  * found in the community's reverse-engineering repo (linked at
1133                  * top of driver). For hid-nintendo, we make sure that the final
1134                  * value given to userspace is always in terms of the axis
1135                  * resolution we provided.
1136                  *
1137                  * Currently only the gyro calculations subtract the calibration
1138                  * offsets from the raw value itself. In testing, doing the same
1139                  * for the accelerometer raw values decreased accuracy.
1140                  *
1141                  * Note that the gyro values are multiplied by the
1142                  * precision-saving scaling factor to prevent large inaccuracies
1143                  * due to truncation of the resolution value which would
1144                  * otherwise occur. To prevent overflow (without resorting to 64
1145                  * bit integer math), the mult_frac macro is used.
1146                  */
1147                 value[0] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
1148                                       (imu_data[i].gyro_x -
1149                                        ctlr->gyro_cal.offset[0])),
1150                                      ctlr->gyro_cal.scale[0],
1151                                      ctlr->imu_cal_gyro_divisor[0]);
1152                 value[1] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
1153                                       (imu_data[i].gyro_y -
1154                                        ctlr->gyro_cal.offset[1])),
1155                                      ctlr->gyro_cal.scale[1],
1156                                      ctlr->imu_cal_gyro_divisor[1]);
1157                 value[2] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
1158                                       (imu_data[i].gyro_z -
1159                                        ctlr->gyro_cal.offset[2])),
1160                                      ctlr->gyro_cal.scale[2],
1161                                      ctlr->imu_cal_gyro_divisor[2]);
1162
1163                 value[3] = ((s32)imu_data[i].accel_x *
1164                             ctlr->accel_cal.scale[0]) /
1165                             ctlr->imu_cal_accel_divisor[0];
1166                 value[4] = ((s32)imu_data[i].accel_y *
1167                             ctlr->accel_cal.scale[1]) /
1168                             ctlr->imu_cal_accel_divisor[1];
1169                 value[5] = ((s32)imu_data[i].accel_z *
1170                             ctlr->accel_cal.scale[2]) /
1171                             ctlr->imu_cal_accel_divisor[2];
1172
1173                 hid_dbg(ctlr->hdev, "raw_gyro: g_x=%d g_y=%d g_z=%d\n",
1174                         imu_data[i].gyro_x, imu_data[i].gyro_y,
1175                         imu_data[i].gyro_z);
1176                 hid_dbg(ctlr->hdev, "raw_accel: a_x=%d a_y=%d a_z=%d\n",
1177                         imu_data[i].accel_x, imu_data[i].accel_y,
1178                         imu_data[i].accel_z);
1179
1180                 /*
1181                  * The right joy-con has 2 axes negated, Y and Z. This is due to
1182                  * the orientation of the IMU in the controller. We negate those
1183                  * axes' values in order to be consistent with the left joy-con
1184                  * and the pro controller:
1185                  *   X: positive is pointing toward the triggers
1186                  *   Y: positive is pointing to the left
1187                  *   Z: positive is pointing up (out of the buttons/sticks)
1188                  * The axes follow the right-hand rule.
1189                  */
1190                 if (jc_type_is_joycon(ctlr) && jc_type_has_right(ctlr)) {
1191                         int j;
1192
1193                         /* negate all but x axis */
1194                         for (j = 1; j < 6; ++j) {
1195                                 if (j == 3)
1196                                         continue;
1197                                 value[j] *= -1;
1198                         }
1199                 }
1200
1201                 input_report_abs(idev, ABS_RX, value[0]);
1202                 input_report_abs(idev, ABS_RY, value[1]);
1203                 input_report_abs(idev, ABS_RZ, value[2]);
1204                 input_report_abs(idev, ABS_X, value[3]);
1205                 input_report_abs(idev, ABS_Y, value[4]);
1206                 input_report_abs(idev, ABS_Z, value[5]);
1207                 input_sync(idev);
1208                 /* convert to micros and divide by 3 (3 samples per report). */
1209                 ctlr->imu_timestamp_us += ctlr->imu_avg_delta_ms * 1000 / 3;
1210         }
1211 }
1212
1213 static void joycon_parse_report(struct joycon_ctlr *ctlr,
1214                                 struct joycon_input_report *rep)
1215 {
1216         struct input_dev *dev = ctlr->input;
1217         unsigned long flags;
1218         u8 tmp;
1219         u32 btns;
1220         unsigned long msecs = jiffies_to_msecs(jiffies);
1221
1222         spin_lock_irqsave(&ctlr->lock, flags);
1223         if (IS_ENABLED(CONFIG_NINTENDO_FF) && rep->vibrator_report &&
1224             (msecs - ctlr->rumble_msecs) >= JC_RUMBLE_PERIOD_MS &&
1225             (ctlr->rumble_queue_head != ctlr->rumble_queue_tail ||
1226              ctlr->rumble_zero_countdown > 0)) {
1227                 /*
1228                  * When this value reaches 0, we know we've sent multiple
1229                  * packets to the controller instructing it to disable rumble.
1230                  * We can safely stop sending periodic rumble packets until the
1231                  * next ff effect.
1232                  */
1233                 if (ctlr->rumble_zero_countdown > 0)
1234                         ctlr->rumble_zero_countdown--;
1235                 queue_work(ctlr->rumble_queue, &ctlr->rumble_worker);
1236         }
1237
1238         /* Parse the battery status */
1239         tmp = rep->bat_con;
1240         ctlr->host_powered = tmp & BIT(0);
1241         ctlr->battery_charging = tmp & BIT(4);
1242         tmp = tmp >> 5;
1243         switch (tmp) {
1244         case 0: /* empty */
1245                 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1246                 break;
1247         case 1: /* low */
1248                 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1249                 break;
1250         case 2: /* medium */
1251                 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1252                 break;
1253         case 3: /* high */
1254                 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
1255                 break;
1256         case 4: /* full */
1257                 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1258                 break;
1259         default:
1260                 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
1261                 hid_warn(ctlr->hdev, "Invalid battery status\n");
1262                 break;
1263         }
1264         spin_unlock_irqrestore(&ctlr->lock, flags);
1265
1266         /* Parse the buttons and sticks */
1267         btns = hid_field_extract(ctlr->hdev, rep->button_status, 0, 24);
1268
1269         if (jc_type_has_left(ctlr)) {
1270                 u16 raw_x;
1271                 u16 raw_y;
1272                 s32 x;
1273                 s32 y;
1274
1275                 /* get raw stick values */
1276                 raw_x = hid_field_extract(ctlr->hdev, rep->left_stick, 0, 12);
1277                 raw_y = hid_field_extract(ctlr->hdev,
1278                                           rep->left_stick + 1, 4, 12);
1279                 /* map the stick values */
1280                 x = joycon_map_stick_val(&ctlr->left_stick_cal_x, raw_x);
1281                 y = -joycon_map_stick_val(&ctlr->left_stick_cal_y, raw_y);
1282                 /* report sticks */
1283                 input_report_abs(dev, ABS_X, x);
1284                 input_report_abs(dev, ABS_Y, y);
1285
1286                 /* report buttons */
1287                 input_report_key(dev, BTN_TL, btns & JC_BTN_L);
1288                 input_report_key(dev, BTN_TL2, btns & JC_BTN_ZL);
1289                 input_report_key(dev, BTN_SELECT, btns & JC_BTN_MINUS);
1290                 input_report_key(dev, BTN_THUMBL, btns & JC_BTN_LSTICK);
1291                 input_report_key(dev, BTN_Z, btns & JC_BTN_CAP);
1292
1293                 if (jc_type_is_joycon(ctlr)) {
1294                         /* Report the S buttons as the non-existent triggers */
1295                         input_report_key(dev, BTN_TR, btns & JC_BTN_SL_L);
1296                         input_report_key(dev, BTN_TR2, btns & JC_BTN_SR_L);
1297
1298                         /* Report d-pad as digital buttons for the joy-cons */
1299                         input_report_key(dev, BTN_DPAD_DOWN,
1300                                          btns & JC_BTN_DOWN);
1301                         input_report_key(dev, BTN_DPAD_UP, btns & JC_BTN_UP);
1302                         input_report_key(dev, BTN_DPAD_RIGHT,
1303                                          btns & JC_BTN_RIGHT);
1304                         input_report_key(dev, BTN_DPAD_LEFT,
1305                                          btns & JC_BTN_LEFT);
1306                 } else {
1307                         int hatx = 0;
1308                         int haty = 0;
1309
1310                         /* d-pad x */
1311                         if (btns & JC_BTN_LEFT)
1312                                 hatx = -1;
1313                         else if (btns & JC_BTN_RIGHT)
1314                                 hatx = 1;
1315                         input_report_abs(dev, ABS_HAT0X, hatx);
1316
1317                         /* d-pad y */
1318                         if (btns & JC_BTN_UP)
1319                                 haty = -1;
1320                         else if (btns & JC_BTN_DOWN)
1321                                 haty = 1;
1322                         input_report_abs(dev, ABS_HAT0Y, haty);
1323                 }
1324         }
1325         if (jc_type_has_right(ctlr)) {
1326                 u16 raw_x;
1327                 u16 raw_y;
1328                 s32 x;
1329                 s32 y;
1330
1331                 /* get raw stick values */
1332                 raw_x = hid_field_extract(ctlr->hdev, rep->right_stick, 0, 12);
1333                 raw_y = hid_field_extract(ctlr->hdev,
1334                                           rep->right_stick + 1, 4, 12);
1335                 /* map stick values */
1336                 x = joycon_map_stick_val(&ctlr->right_stick_cal_x, raw_x);
1337                 y = -joycon_map_stick_val(&ctlr->right_stick_cal_y, raw_y);
1338                 /* report sticks */
1339                 input_report_abs(dev, ABS_RX, x);
1340                 input_report_abs(dev, ABS_RY, y);
1341
1342                 /* report buttons */
1343                 input_report_key(dev, BTN_TR, btns & JC_BTN_R);
1344                 input_report_key(dev, BTN_TR2, btns & JC_BTN_ZR);
1345                 if (jc_type_is_joycon(ctlr)) {
1346                         /* Report the S buttons as the non-existent triggers */
1347                         input_report_key(dev, BTN_TL, btns & JC_BTN_SL_R);
1348                         input_report_key(dev, BTN_TL2, btns & JC_BTN_SR_R);
1349                 }
1350                 input_report_key(dev, BTN_START, btns & JC_BTN_PLUS);
1351                 input_report_key(dev, BTN_THUMBR, btns & JC_BTN_RSTICK);
1352                 input_report_key(dev, BTN_MODE, btns & JC_BTN_HOME);
1353                 input_report_key(dev, BTN_WEST, btns & JC_BTN_Y);
1354                 input_report_key(dev, BTN_NORTH, btns & JC_BTN_X);
1355                 input_report_key(dev, BTN_EAST, btns & JC_BTN_A);
1356                 input_report_key(dev, BTN_SOUTH, btns & JC_BTN_B);
1357         }
1358
1359         input_sync(dev);
1360
1361         /*
1362          * Immediately after receiving a report is the most reliable time to
1363          * send a subcommand to the controller. Wake any subcommand senders
1364          * waiting for a report.
1365          */
1366         if (unlikely(mutex_is_locked(&ctlr->output_mutex))) {
1367                 spin_lock_irqsave(&ctlr->lock, flags);
1368                 ctlr->received_input_report = true;
1369                 spin_unlock_irqrestore(&ctlr->lock, flags);
1370                 wake_up(&ctlr->wait);
1371         }
1372
1373         /* parse IMU data if present */
1374         if (rep->id == JC_INPUT_IMU_DATA)
1375                 joycon_parse_imu_report(ctlr, rep);
1376 }
1377
1378 static int joycon_send_rumble_data(struct joycon_ctlr *ctlr)
1379 {
1380         int ret;
1381         unsigned long flags;
1382         struct joycon_rumble_output rumble_output = { 0 };
1383
1384         spin_lock_irqsave(&ctlr->lock, flags);
1385         /*
1386          * If the controller has been removed, just return ENODEV so the LED
1387          * subsystem doesn't print invalid errors on removal.
1388          */
1389         if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) {
1390                 spin_unlock_irqrestore(&ctlr->lock, flags);
1391                 return -ENODEV;
1392         }
1393         memcpy(rumble_output.rumble_data,
1394                ctlr->rumble_data[ctlr->rumble_queue_tail],
1395                JC_RUMBLE_DATA_SIZE);
1396         spin_unlock_irqrestore(&ctlr->lock, flags);
1397
1398         rumble_output.output_id = JC_OUTPUT_RUMBLE_ONLY;
1399         rumble_output.packet_num = ctlr->subcmd_num;
1400         if (++ctlr->subcmd_num > 0xF)
1401                 ctlr->subcmd_num = 0;
1402
1403         joycon_enforce_subcmd_rate(ctlr);
1404
1405         ret = __joycon_hid_send(ctlr->hdev, (u8 *)&rumble_output,
1406                                 sizeof(rumble_output));
1407         return ret;
1408 }
1409
1410 static void joycon_rumble_worker(struct work_struct *work)
1411 {
1412         struct joycon_ctlr *ctlr = container_of(work, struct joycon_ctlr,
1413                                                         rumble_worker);
1414         unsigned long flags;
1415         bool again = true;
1416         int ret;
1417
1418         while (again) {
1419                 mutex_lock(&ctlr->output_mutex);
1420                 ret = joycon_send_rumble_data(ctlr);
1421                 mutex_unlock(&ctlr->output_mutex);
1422
1423                 /* -ENODEV means the controller was just unplugged */
1424                 spin_lock_irqsave(&ctlr->lock, flags);
1425                 if (ret < 0 && ret != -ENODEV &&
1426                     ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED)
1427                         hid_warn(ctlr->hdev, "Failed to set rumble; e=%d", ret);
1428
1429                 ctlr->rumble_msecs = jiffies_to_msecs(jiffies);
1430                 if (ctlr->rumble_queue_tail != ctlr->rumble_queue_head) {
1431                         if (++ctlr->rumble_queue_tail >= JC_RUMBLE_QUEUE_SIZE)
1432                                 ctlr->rumble_queue_tail = 0;
1433                 } else {
1434                         again = false;
1435                 }
1436                 spin_unlock_irqrestore(&ctlr->lock, flags);
1437         }
1438 }
1439
1440 #if IS_ENABLED(CONFIG_NINTENDO_FF)
1441 static struct joycon_rumble_freq_data joycon_find_rumble_freq(u16 freq)
1442 {
1443         const size_t length = ARRAY_SIZE(joycon_rumble_frequencies);
1444         const struct joycon_rumble_freq_data *data = joycon_rumble_frequencies;
1445         int i = 0;
1446
1447         if (freq > data[0].freq) {
1448                 for (i = 1; i < length - 1; i++) {
1449                         if (freq > data[i - 1].freq && freq <= data[i].freq)
1450                                 break;
1451                 }
1452         }
1453
1454         return data[i];
1455 }
1456
1457 static struct joycon_rumble_amp_data joycon_find_rumble_amp(u16 amp)
1458 {
1459         const size_t length = ARRAY_SIZE(joycon_rumble_amplitudes);
1460         const struct joycon_rumble_amp_data *data = joycon_rumble_amplitudes;
1461         int i = 0;
1462
1463         if (amp > data[0].amp) {
1464                 for (i = 1; i < length - 1; i++) {
1465                         if (amp > data[i - 1].amp && amp <= data[i].amp)
1466                                 break;
1467                 }
1468         }
1469
1470         return data[i];
1471 }
1472
1473 static void joycon_encode_rumble(u8 *data, u16 freq_low, u16 freq_high, u16 amp)
1474 {
1475         struct joycon_rumble_freq_data freq_data_low;
1476         struct joycon_rumble_freq_data freq_data_high;
1477         struct joycon_rumble_amp_data amp_data;
1478
1479         freq_data_low = joycon_find_rumble_freq(freq_low);
1480         freq_data_high = joycon_find_rumble_freq(freq_high);
1481         amp_data = joycon_find_rumble_amp(amp);
1482
1483         data[0] = (freq_data_high.high >> 8) & 0xFF;
1484         data[1] = (freq_data_high.high & 0xFF) + amp_data.high;
1485         data[2] = freq_data_low.low + ((amp_data.low >> 8) & 0xFF);
1486         data[3] = amp_data.low & 0xFF;
1487 }
1488
1489 static const u16 JOYCON_MAX_RUMBLE_HIGH_FREQ    = 1253;
1490 static const u16 JOYCON_MIN_RUMBLE_HIGH_FREQ    = 82;
1491 static const u16 JOYCON_MAX_RUMBLE_LOW_FREQ     = 626;
1492 static const u16 JOYCON_MIN_RUMBLE_LOW_FREQ     = 41;
1493
1494 static void joycon_clamp_rumble_freqs(struct joycon_ctlr *ctlr)
1495 {
1496         unsigned long flags;
1497
1498         spin_lock_irqsave(&ctlr->lock, flags);
1499         ctlr->rumble_ll_freq = clamp(ctlr->rumble_ll_freq,
1500                                      JOYCON_MIN_RUMBLE_LOW_FREQ,
1501                                      JOYCON_MAX_RUMBLE_LOW_FREQ);
1502         ctlr->rumble_lh_freq = clamp(ctlr->rumble_lh_freq,
1503                                      JOYCON_MIN_RUMBLE_HIGH_FREQ,
1504                                      JOYCON_MAX_RUMBLE_HIGH_FREQ);
1505         ctlr->rumble_rl_freq = clamp(ctlr->rumble_rl_freq,
1506                                      JOYCON_MIN_RUMBLE_LOW_FREQ,
1507                                      JOYCON_MAX_RUMBLE_LOW_FREQ);
1508         ctlr->rumble_rh_freq = clamp(ctlr->rumble_rh_freq,
1509                                      JOYCON_MIN_RUMBLE_HIGH_FREQ,
1510                                      JOYCON_MAX_RUMBLE_HIGH_FREQ);
1511         spin_unlock_irqrestore(&ctlr->lock, flags);
1512 }
1513
1514 static int joycon_set_rumble(struct joycon_ctlr *ctlr, u16 amp_r, u16 amp_l,
1515                              bool schedule_now)
1516 {
1517         u8 data[JC_RUMBLE_DATA_SIZE];
1518         u16 amp;
1519         u16 freq_r_low;
1520         u16 freq_r_high;
1521         u16 freq_l_low;
1522         u16 freq_l_high;
1523         unsigned long flags;
1524
1525         spin_lock_irqsave(&ctlr->lock, flags);
1526         freq_r_low = ctlr->rumble_rl_freq;
1527         freq_r_high = ctlr->rumble_rh_freq;
1528         freq_l_low = ctlr->rumble_ll_freq;
1529         freq_l_high = ctlr->rumble_lh_freq;
1530         /* limit number of silent rumble packets to reduce traffic */
1531         if (amp_l != 0 || amp_r != 0)
1532                 ctlr->rumble_zero_countdown = JC_RUMBLE_ZERO_AMP_PKT_CNT;
1533         spin_unlock_irqrestore(&ctlr->lock, flags);
1534
1535         /* right joy-con */
1536         amp = amp_r * (u32)joycon_max_rumble_amp / 65535;
1537         joycon_encode_rumble(data + 4, freq_r_low, freq_r_high, amp);
1538
1539         /* left joy-con */
1540         amp = amp_l * (u32)joycon_max_rumble_amp / 65535;
1541         joycon_encode_rumble(data, freq_l_low, freq_l_high, amp);
1542
1543         spin_lock_irqsave(&ctlr->lock, flags);
1544         if (++ctlr->rumble_queue_head >= JC_RUMBLE_QUEUE_SIZE)
1545                 ctlr->rumble_queue_head = 0;
1546         memcpy(ctlr->rumble_data[ctlr->rumble_queue_head], data,
1547                JC_RUMBLE_DATA_SIZE);
1548         spin_unlock_irqrestore(&ctlr->lock, flags);
1549
1550         /* don't wait for the periodic send (reduces latency) */
1551         if (schedule_now)
1552                 queue_work(ctlr->rumble_queue, &ctlr->rumble_worker);
1553
1554         return 0;
1555 }
1556
1557 static int joycon_play_effect(struct input_dev *dev, void *data,
1558                                                      struct ff_effect *effect)
1559 {
1560         struct joycon_ctlr *ctlr = input_get_drvdata(dev);
1561
1562         if (effect->type != FF_RUMBLE)
1563                 return 0;
1564
1565         return joycon_set_rumble(ctlr,
1566                                  effect->u.rumble.weak_magnitude,
1567                                  effect->u.rumble.strong_magnitude,
1568                                  true);
1569 }
1570 #endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */
1571
1572 static const unsigned int joycon_button_inputs_l[] = {
1573         BTN_SELECT, BTN_Z, BTN_THUMBL,
1574         BTN_TL, BTN_TL2,
1575         0 /* 0 signals end of array */
1576 };
1577
1578 static const unsigned int joycon_button_inputs_r[] = {
1579         BTN_START, BTN_MODE, BTN_THUMBR,
1580         BTN_SOUTH, BTN_EAST, BTN_NORTH, BTN_WEST,
1581         BTN_TR, BTN_TR2,
1582         0 /* 0 signals end of array */
1583 };
1584
1585 /* We report joy-con d-pad inputs as buttons and pro controller as a hat. */
1586 static const unsigned int joycon_dpad_inputs_jc[] = {
1587         BTN_DPAD_UP, BTN_DPAD_DOWN, BTN_DPAD_LEFT, BTN_DPAD_RIGHT,
1588         0 /* 0 signals end of array */
1589 };
1590
1591 static int joycon_input_create(struct joycon_ctlr *ctlr)
1592 {
1593         struct hid_device *hdev;
1594         const char *name;
1595         const char *imu_name;
1596         int ret;
1597         int i;
1598
1599         hdev = ctlr->hdev;
1600
1601         switch (hdev->product) {
1602         case USB_DEVICE_ID_NINTENDO_PROCON:
1603                 name = "Nintendo Switch Pro Controller";
1604                 imu_name = "Nintendo Switch Pro Controller IMU";
1605                 break;
1606         case USB_DEVICE_ID_NINTENDO_CHRGGRIP:
1607                 if (jc_type_has_left(ctlr)) {
1608                         name = "Nintendo Switch Left Joy-Con (Grip)";
1609                         imu_name = "Nintendo Switch Left Joy-Con IMU (Grip)";
1610                 } else {
1611                         name = "Nintendo Switch Right Joy-Con (Grip)";
1612                         imu_name = "Nintendo Switch Right Joy-Con IMU (Grip)";
1613                 }
1614                 break;
1615         case USB_DEVICE_ID_NINTENDO_JOYCONL:
1616                 name = "Nintendo Switch Left Joy-Con";
1617                 imu_name = "Nintendo Switch Left Joy-Con IMU";
1618                 break;
1619         case USB_DEVICE_ID_NINTENDO_JOYCONR:
1620                 name = "Nintendo Switch Right Joy-Con";
1621                 imu_name = "Nintendo Switch Right Joy-Con IMU";
1622                 break;
1623         default: /* Should be impossible */
1624                 hid_err(hdev, "Invalid hid product\n");
1625                 return -EINVAL;
1626         }
1627
1628         ctlr->input = devm_input_allocate_device(&hdev->dev);
1629         if (!ctlr->input)
1630                 return -ENOMEM;
1631         ctlr->input->id.bustype = hdev->bus;
1632         ctlr->input->id.vendor = hdev->vendor;
1633         ctlr->input->id.product = hdev->product;
1634         ctlr->input->id.version = hdev->version;
1635         ctlr->input->uniq = ctlr->mac_addr_str;
1636         ctlr->input->name = name;
1637         ctlr->input->phys = hdev->phys;
1638         input_set_drvdata(ctlr->input, ctlr);
1639
1640         /* set up sticks and buttons */
1641         if (jc_type_has_left(ctlr)) {
1642                 input_set_abs_params(ctlr->input, ABS_X,
1643                                      -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
1644                                      JC_STICK_FUZZ, JC_STICK_FLAT);
1645                 input_set_abs_params(ctlr->input, ABS_Y,
1646                                      -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
1647                                      JC_STICK_FUZZ, JC_STICK_FLAT);
1648
1649                 for (i = 0; joycon_button_inputs_l[i] > 0; i++)
1650                         input_set_capability(ctlr->input, EV_KEY,
1651                                              joycon_button_inputs_l[i]);
1652
1653                 /* configure d-pad differently for joy-con vs pro controller */
1654                 if (hdev->product != USB_DEVICE_ID_NINTENDO_PROCON) {
1655                         for (i = 0; joycon_dpad_inputs_jc[i] > 0; i++)
1656                                 input_set_capability(ctlr->input, EV_KEY,
1657                                                      joycon_dpad_inputs_jc[i]);
1658                 } else {
1659                         input_set_abs_params(ctlr->input, ABS_HAT0X,
1660                                              -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG,
1661                                              JC_DPAD_FUZZ, JC_DPAD_FLAT);
1662                         input_set_abs_params(ctlr->input, ABS_HAT0Y,
1663                                              -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG,
1664                                              JC_DPAD_FUZZ, JC_DPAD_FLAT);
1665                 }
1666         }
1667         if (jc_type_has_right(ctlr)) {
1668                 input_set_abs_params(ctlr->input, ABS_RX,
1669                                      -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
1670                                      JC_STICK_FUZZ, JC_STICK_FLAT);
1671                 input_set_abs_params(ctlr->input, ABS_RY,
1672                                      -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG,
1673                                      JC_STICK_FUZZ, JC_STICK_FLAT);
1674
1675                 for (i = 0; joycon_button_inputs_r[i] > 0; i++)
1676                         input_set_capability(ctlr->input, EV_KEY,
1677                                              joycon_button_inputs_r[i]);
1678         }
1679
1680         /* Let's report joy-con S triggers separately */
1681         if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL) {
1682                 input_set_capability(ctlr->input, EV_KEY, BTN_TR);
1683                 input_set_capability(ctlr->input, EV_KEY, BTN_TR2);
1684         } else if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR) {
1685                 input_set_capability(ctlr->input, EV_KEY, BTN_TL);
1686                 input_set_capability(ctlr->input, EV_KEY, BTN_TL2);
1687         }
1688
1689 #if IS_ENABLED(CONFIG_NINTENDO_FF)
1690         /* set up rumble */
1691         input_set_capability(ctlr->input, EV_FF, FF_RUMBLE);
1692         input_ff_create_memless(ctlr->input, NULL, joycon_play_effect);
1693         ctlr->rumble_ll_freq = JC_RUMBLE_DFLT_LOW_FREQ;
1694         ctlr->rumble_lh_freq = JC_RUMBLE_DFLT_HIGH_FREQ;
1695         ctlr->rumble_rl_freq = JC_RUMBLE_DFLT_LOW_FREQ;
1696         ctlr->rumble_rh_freq = JC_RUMBLE_DFLT_HIGH_FREQ;
1697         joycon_clamp_rumble_freqs(ctlr);
1698         joycon_set_rumble(ctlr, 0, 0, false);
1699         ctlr->rumble_msecs = jiffies_to_msecs(jiffies);
1700 #endif
1701
1702         ret = input_register_device(ctlr->input);
1703         if (ret)
1704                 return ret;
1705
1706         /* configure the imu input device */
1707         ctlr->imu_input = devm_input_allocate_device(&hdev->dev);
1708         if (!ctlr->imu_input)
1709                 return -ENOMEM;
1710
1711         ctlr->imu_input->id.bustype = hdev->bus;
1712         ctlr->imu_input->id.vendor = hdev->vendor;
1713         ctlr->imu_input->id.product = hdev->product;
1714         ctlr->imu_input->id.version = hdev->version;
1715         ctlr->imu_input->uniq = ctlr->mac_addr_str;
1716         ctlr->imu_input->name = imu_name;
1717         ctlr->imu_input->phys = hdev->phys;
1718         input_set_drvdata(ctlr->imu_input, ctlr);
1719
1720         /* configure imu axes */
1721         input_set_abs_params(ctlr->imu_input, ABS_X,
1722                              -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
1723                              JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
1724         input_set_abs_params(ctlr->imu_input, ABS_Y,
1725                              -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
1726                              JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
1727         input_set_abs_params(ctlr->imu_input, ABS_Z,
1728                              -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
1729                              JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
1730         input_abs_set_res(ctlr->imu_input, ABS_X, JC_IMU_ACCEL_RES_PER_G);
1731         input_abs_set_res(ctlr->imu_input, ABS_Y, JC_IMU_ACCEL_RES_PER_G);
1732         input_abs_set_res(ctlr->imu_input, ABS_Z, JC_IMU_ACCEL_RES_PER_G);
1733
1734         input_set_abs_params(ctlr->imu_input, ABS_RX,
1735                              -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
1736                              JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
1737         input_set_abs_params(ctlr->imu_input, ABS_RY,
1738                              -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
1739                              JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
1740         input_set_abs_params(ctlr->imu_input, ABS_RZ,
1741                              -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
1742                              JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
1743
1744         input_abs_set_res(ctlr->imu_input, ABS_RX, JC_IMU_GYRO_RES_PER_DPS);
1745         input_abs_set_res(ctlr->imu_input, ABS_RY, JC_IMU_GYRO_RES_PER_DPS);
1746         input_abs_set_res(ctlr->imu_input, ABS_RZ, JC_IMU_GYRO_RES_PER_DPS);
1747
1748         __set_bit(EV_MSC, ctlr->imu_input->evbit);
1749         __set_bit(MSC_TIMESTAMP, ctlr->imu_input->mscbit);
1750         __set_bit(INPUT_PROP_ACCELEROMETER, ctlr->imu_input->propbit);
1751
1752         ret = input_register_device(ctlr->imu_input);
1753         if (ret)
1754                 return ret;
1755
1756         return 0;
1757 }
1758
1759 static int joycon_player_led_brightness_set(struct led_classdev *led,
1760                                             enum led_brightness brightness)
1761 {
1762         struct device *dev = led->dev->parent;
1763         struct hid_device *hdev = to_hid_device(dev);
1764         struct joycon_ctlr *ctlr;
1765         int val = 0;
1766         int i;
1767         int ret;
1768         int num;
1769
1770         ctlr = hid_get_drvdata(hdev);
1771         if (!ctlr) {
1772                 hid_err(hdev, "No controller data\n");
1773                 return -ENODEV;
1774         }
1775
1776         /* determine which player led this is */
1777         for (num = 0; num < JC_NUM_LEDS; num++) {
1778                 if (&ctlr->leds[num] == led)
1779                         break;
1780         }
1781         if (num >= JC_NUM_LEDS)
1782                 return -EINVAL;
1783
1784         mutex_lock(&ctlr->output_mutex);
1785         for (i = 0; i < JC_NUM_LEDS; i++) {
1786                 if (i == num)
1787                         val |= brightness << i;
1788                 else
1789                         val |= ctlr->leds[i].brightness << i;
1790         }
1791         ret = joycon_set_player_leds(ctlr, 0, val);
1792         mutex_unlock(&ctlr->output_mutex);
1793
1794         return ret;
1795 }
1796
1797 static int joycon_home_led_brightness_set(struct led_classdev *led,
1798                                           enum led_brightness brightness)
1799 {
1800         struct device *dev = led->dev->parent;
1801         struct hid_device *hdev = to_hid_device(dev);
1802         struct joycon_ctlr *ctlr;
1803         struct joycon_subcmd_request *req;
1804         u8 buffer[sizeof(*req) + 5] = { 0 };
1805         u8 *data;
1806         int ret;
1807
1808         ctlr = hid_get_drvdata(hdev);
1809         if (!ctlr) {
1810                 hid_err(hdev, "No controller data\n");
1811                 return -ENODEV;
1812         }
1813
1814         req = (struct joycon_subcmd_request *)buffer;
1815         req->subcmd_id = JC_SUBCMD_SET_HOME_LIGHT;
1816         data = req->data;
1817         data[0] = 0x01;
1818         data[1] = brightness << 4;
1819         data[2] = brightness | (brightness << 4);
1820         data[3] = 0x11;
1821         data[4] = 0x11;
1822
1823         hid_dbg(hdev, "setting home led brightness\n");
1824         mutex_lock(&ctlr->output_mutex);
1825         ret = joycon_send_subcmd(ctlr, req, 5, HZ/4);
1826         mutex_unlock(&ctlr->output_mutex);
1827
1828         return ret;
1829 }
1830
1831 static DEFINE_MUTEX(joycon_input_num_mutex);
1832 static int joycon_leds_create(struct joycon_ctlr *ctlr)
1833 {
1834         struct hid_device *hdev = ctlr->hdev;
1835         struct device *dev = &hdev->dev;
1836         const char *d_name = dev_name(dev);
1837         struct led_classdev *led;
1838         char *name;
1839         int ret = 0;
1840         int i;
1841         static int input_num = 1;
1842
1843         /* Set the default controller player leds based on controller number */
1844         mutex_lock(&joycon_input_num_mutex);
1845         mutex_lock(&ctlr->output_mutex);
1846         ret = joycon_set_player_leds(ctlr, 0, 0xF >> (4 - input_num));
1847         if (ret)
1848                 hid_warn(ctlr->hdev, "Failed to set leds; ret=%d\n", ret);
1849         mutex_unlock(&ctlr->output_mutex);
1850
1851         /* configure the player LEDs */
1852         for (i = 0; i < JC_NUM_LEDS; i++) {
1853                 name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s",
1854                                       d_name,
1855                                       "green",
1856                                       joycon_player_led_names[i]);
1857                 if (!name) {
1858                         mutex_unlock(&joycon_input_num_mutex);
1859                         return -ENOMEM;
1860                 }
1861
1862                 led = &ctlr->leds[i];
1863                 led->name = name;
1864                 led->brightness = ((i + 1) <= input_num) ? 1 : 0;
1865                 led->max_brightness = 1;
1866                 led->brightness_set_blocking =
1867                                         joycon_player_led_brightness_set;
1868                 led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE;
1869
1870                 ret = devm_led_classdev_register(&hdev->dev, led);
1871                 if (ret) {
1872                         hid_err(hdev, "Failed registering %s LED\n", led->name);
1873                         mutex_unlock(&joycon_input_num_mutex);
1874                         return ret;
1875                 }
1876         }
1877
1878         if (++input_num > 4)
1879                 input_num = 1;
1880         mutex_unlock(&joycon_input_num_mutex);
1881
1882         /* configure the home LED */
1883         if (jc_type_has_right(ctlr)) {
1884                 name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s",
1885                                       d_name,
1886                                       "blue",
1887                                       LED_FUNCTION_PLAYER5);
1888                 if (!name)
1889                         return -ENOMEM;
1890
1891                 led = &ctlr->home_led;
1892                 led->name = name;
1893                 led->brightness = 0;
1894                 led->max_brightness = 0xF;
1895                 led->brightness_set_blocking = joycon_home_led_brightness_set;
1896                 led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE;
1897                 ret = devm_led_classdev_register(&hdev->dev, led);
1898                 if (ret) {
1899                         hid_err(hdev, "Failed registering home led\n");
1900                         return ret;
1901                 }
1902                 /* Set the home LED to 0 as default state */
1903                 ret = joycon_home_led_brightness_set(led, 0);
1904                 if (ret) {
1905                         hid_err(hdev, "Failed to set home LED dflt; ret=%d\n",
1906                                                                         ret);
1907                         return ret;
1908                 }
1909         }
1910
1911         return 0;
1912 }
1913
1914 static int joycon_battery_get_property(struct power_supply *supply,
1915                                        enum power_supply_property prop,
1916                                        union power_supply_propval *val)
1917 {
1918         struct joycon_ctlr *ctlr = power_supply_get_drvdata(supply);
1919         unsigned long flags;
1920         int ret = 0;
1921         u8 capacity;
1922         bool charging;
1923         bool powered;
1924
1925         spin_lock_irqsave(&ctlr->lock, flags);
1926         capacity = ctlr->battery_capacity;
1927         charging = ctlr->battery_charging;
1928         powered = ctlr->host_powered;
1929         spin_unlock_irqrestore(&ctlr->lock, flags);
1930
1931         switch (prop) {
1932         case POWER_SUPPLY_PROP_PRESENT:
1933                 val->intval = 1;
1934                 break;
1935         case POWER_SUPPLY_PROP_SCOPE:
1936                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1937                 break;
1938         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
1939                 val->intval = capacity;
1940                 break;
1941         case POWER_SUPPLY_PROP_STATUS:
1942                 if (charging)
1943                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
1944                 else if (capacity == POWER_SUPPLY_CAPACITY_LEVEL_FULL &&
1945                          powered)
1946                         val->intval = POWER_SUPPLY_STATUS_FULL;
1947                 else
1948                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1949                 break;
1950         default:
1951                 ret = -EINVAL;
1952                 break;
1953         }
1954         return ret;
1955 }
1956
1957 static enum power_supply_property joycon_battery_props[] = {
1958         POWER_SUPPLY_PROP_PRESENT,
1959         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
1960         POWER_SUPPLY_PROP_SCOPE,
1961         POWER_SUPPLY_PROP_STATUS,
1962 };
1963
1964 static int joycon_power_supply_create(struct joycon_ctlr *ctlr)
1965 {
1966         struct hid_device *hdev = ctlr->hdev;
1967         struct power_supply_config supply_config = { .drv_data = ctlr, };
1968         const char * const name_fmt = "nintendo_switch_controller_battery_%s";
1969         int ret = 0;
1970
1971         /* Set initially to unknown before receiving first input report */
1972         ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
1973
1974         /* Configure the battery's description */
1975         ctlr->battery_desc.properties = joycon_battery_props;
1976         ctlr->battery_desc.num_properties =
1977                                         ARRAY_SIZE(joycon_battery_props);
1978         ctlr->battery_desc.get_property = joycon_battery_get_property;
1979         ctlr->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
1980         ctlr->battery_desc.use_for_apm = 0;
1981         ctlr->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
1982                                                  name_fmt,
1983                                                  dev_name(&hdev->dev));
1984         if (!ctlr->battery_desc.name)
1985                 return -ENOMEM;
1986
1987         ctlr->battery = devm_power_supply_register(&hdev->dev,
1988                                                    &ctlr->battery_desc,
1989                                                    &supply_config);
1990         if (IS_ERR(ctlr->battery)) {
1991                 ret = PTR_ERR(ctlr->battery);
1992                 hid_err(hdev, "Failed to register battery; ret=%d\n", ret);
1993                 return ret;
1994         }
1995
1996         return power_supply_powers(ctlr->battery, &hdev->dev);
1997 }
1998
1999 static int joycon_read_info(struct joycon_ctlr *ctlr)
2000 {
2001         int ret;
2002         int i;
2003         int j;
2004         struct joycon_subcmd_request req = { 0 };
2005         struct joycon_input_report *report;
2006
2007         req.subcmd_id = JC_SUBCMD_REQ_DEV_INFO;
2008         ret = joycon_send_subcmd(ctlr, &req, 0, HZ);
2009         if (ret) {
2010                 hid_err(ctlr->hdev, "Failed to get joycon info; ret=%d\n", ret);
2011                 return ret;
2012         }
2013
2014         report = (struct joycon_input_report *)ctlr->input_buf;
2015
2016         for (i = 4, j = 0; j < 6; i++, j++)
2017                 ctlr->mac_addr[j] = report->subcmd_reply.data[i];
2018
2019         ctlr->mac_addr_str = devm_kasprintf(&ctlr->hdev->dev, GFP_KERNEL,
2020                                             "%02X:%02X:%02X:%02X:%02X:%02X",
2021                                             ctlr->mac_addr[0],
2022                                             ctlr->mac_addr[1],
2023                                             ctlr->mac_addr[2],
2024                                             ctlr->mac_addr[3],
2025                                             ctlr->mac_addr[4],
2026                                             ctlr->mac_addr[5]);
2027         if (!ctlr->mac_addr_str)
2028                 return -ENOMEM;
2029         hid_info(ctlr->hdev, "controller MAC = %s\n", ctlr->mac_addr_str);
2030
2031         /* Retrieve the type so we can distinguish for charging grip */
2032         ctlr->ctlr_type = report->subcmd_reply.data[2];
2033
2034         return 0;
2035 }
2036
2037 /* Common handler for parsing inputs */
2038 static int joycon_ctlr_read_handler(struct joycon_ctlr *ctlr, u8 *data,
2039                                                               int size)
2040 {
2041         if (data[0] == JC_INPUT_SUBCMD_REPLY || data[0] == JC_INPUT_IMU_DATA ||
2042             data[0] == JC_INPUT_MCU_DATA) {
2043                 if (size >= 12) /* make sure it contains the input report */
2044                         joycon_parse_report(ctlr,
2045                                             (struct joycon_input_report *)data);
2046         }
2047
2048         return 0;
2049 }
2050
2051 static int joycon_ctlr_handle_event(struct joycon_ctlr *ctlr, u8 *data,
2052                                                               int size)
2053 {
2054         int ret = 0;
2055         bool match = false;
2056         struct joycon_input_report *report;
2057
2058         if (unlikely(mutex_is_locked(&ctlr->output_mutex)) &&
2059             ctlr->msg_type != JOYCON_MSG_TYPE_NONE) {
2060                 switch (ctlr->msg_type) {
2061                 case JOYCON_MSG_TYPE_USB:
2062                         if (size < 2)
2063                                 break;
2064                         if (data[0] == JC_INPUT_USB_RESPONSE &&
2065                             data[1] == ctlr->usb_ack_match)
2066                                 match = true;
2067                         break;
2068                 case JOYCON_MSG_TYPE_SUBCMD:
2069                         if (size < sizeof(struct joycon_input_report) ||
2070                             data[0] != JC_INPUT_SUBCMD_REPLY)
2071                                 break;
2072                         report = (struct joycon_input_report *)data;
2073                         if (report->subcmd_reply.id == ctlr->subcmd_ack_match)
2074                                 match = true;
2075                         break;
2076                 default:
2077                         break;
2078                 }
2079
2080                 if (match) {
2081                         memcpy(ctlr->input_buf, data,
2082                                min(size, (int)JC_MAX_RESP_SIZE));
2083                         ctlr->msg_type = JOYCON_MSG_TYPE_NONE;
2084                         ctlr->received_resp = true;
2085                         wake_up(&ctlr->wait);
2086
2087                         /* This message has been handled */
2088                         return 1;
2089                 }
2090         }
2091
2092         if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ)
2093                 ret = joycon_ctlr_read_handler(ctlr, data, size);
2094
2095         return ret;
2096 }
2097
2098 static int nintendo_hid_event(struct hid_device *hdev,
2099                               struct hid_report *report, u8 *raw_data, int size)
2100 {
2101         struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
2102
2103         if (size < 1)
2104                 return -EINVAL;
2105
2106         return joycon_ctlr_handle_event(ctlr, raw_data, size);
2107 }
2108
2109 static int nintendo_hid_probe(struct hid_device *hdev,
2110                             const struct hid_device_id *id)
2111 {
2112         int ret;
2113         struct joycon_ctlr *ctlr;
2114
2115         hid_dbg(hdev, "probe - start\n");
2116
2117         ctlr = devm_kzalloc(&hdev->dev, sizeof(*ctlr), GFP_KERNEL);
2118         if (!ctlr) {
2119                 ret = -ENOMEM;
2120                 goto err;
2121         }
2122
2123         ctlr->hdev = hdev;
2124         ctlr->ctlr_state = JOYCON_CTLR_STATE_INIT;
2125         ctlr->rumble_queue_head = JC_RUMBLE_QUEUE_SIZE - 1;
2126         ctlr->rumble_queue_tail = 0;
2127         hid_set_drvdata(hdev, ctlr);
2128         mutex_init(&ctlr->output_mutex);
2129         init_waitqueue_head(&ctlr->wait);
2130         spin_lock_init(&ctlr->lock);
2131         ctlr->rumble_queue = alloc_workqueue("hid-nintendo-rumble_wq",
2132                                              WQ_FREEZABLE | WQ_MEM_RECLAIM, 0);
2133         if (!ctlr->rumble_queue) {
2134                 ret = -ENOMEM;
2135                 goto err;
2136         }
2137         INIT_WORK(&ctlr->rumble_worker, joycon_rumble_worker);
2138
2139         ret = hid_parse(hdev);
2140         if (ret) {
2141                 hid_err(hdev, "HID parse failed\n");
2142                 goto err_wq;
2143         }
2144
2145         /*
2146          * Patch the hw version of pro controller/joycons, so applications can
2147          * distinguish between the default HID mappings and the mappings defined
2148          * by the Linux game controller spec. This is important for the SDL2
2149          * library, which has a game controller database, which uses device ids
2150          * in combination with version as a key.
2151          */
2152         hdev->version |= 0x8000;
2153
2154         ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
2155         if (ret) {
2156                 hid_err(hdev, "HW start failed\n");
2157                 goto err_wq;
2158         }
2159
2160         ret = hid_hw_open(hdev);
2161         if (ret) {
2162                 hid_err(hdev, "cannot start hardware I/O\n");
2163                 goto err_stop;
2164         }
2165
2166         hid_device_io_start(hdev);
2167
2168         /* Initialize the controller */
2169         mutex_lock(&ctlr->output_mutex);
2170         /* if handshake command fails, assume ble pro controller */
2171         if ((jc_type_is_procon(ctlr) || jc_type_is_chrggrip(ctlr)) &&
2172             !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ)) {
2173                 hid_dbg(hdev, "detected USB controller\n");
2174                 /* set baudrate for improved latency */
2175                 ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M, HZ);
2176                 if (ret) {
2177                         hid_err(hdev, "Failed to set baudrate; ret=%d\n", ret);
2178                         goto err_mutex;
2179                 }
2180                 /* handshake */
2181                 ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ);
2182                 if (ret) {
2183                         hid_err(hdev, "Failed handshake; ret=%d\n", ret);
2184                         goto err_mutex;
2185                 }
2186                 /*
2187                  * Set no timeout (to keep controller in USB mode).
2188                  * This doesn't send a response, so ignore the timeout.
2189                  */
2190                 joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT, HZ/10);
2191         } else if (jc_type_is_chrggrip(ctlr)) {
2192                 hid_err(hdev, "Failed charging grip handshake\n");
2193                 ret = -ETIMEDOUT;
2194                 goto err_mutex;
2195         }
2196
2197         /* get controller calibration data, and parse it */
2198         ret = joycon_request_calibration(ctlr);
2199         if (ret) {
2200                 /*
2201                  * We can function with default calibration, but it may be
2202                  * inaccurate. Provide a warning, and continue on.
2203                  */
2204                 hid_warn(hdev, "Analog stick positions may be inaccurate\n");
2205         }
2206
2207         /* get IMU calibration data, and parse it */
2208         ret = joycon_request_imu_calibration(ctlr);
2209         if (ret) {
2210                 /*
2211                  * We can function with default calibration, but it may be
2212                  * inaccurate. Provide a warning, and continue on.
2213                  */
2214                 hid_warn(hdev, "Unable to read IMU calibration data\n");
2215         }
2216
2217         /* Set the reporting mode to 0x30, which is the full report mode */
2218         ret = joycon_set_report_mode(ctlr);
2219         if (ret) {
2220                 hid_err(hdev, "Failed to set report mode; ret=%d\n", ret);
2221                 goto err_mutex;
2222         }
2223
2224         /* Enable rumble */
2225         ret = joycon_enable_rumble(ctlr);
2226         if (ret) {
2227                 hid_err(hdev, "Failed to enable rumble; ret=%d\n", ret);
2228                 goto err_mutex;
2229         }
2230
2231         /* Enable the IMU */
2232         ret = joycon_enable_imu(ctlr);
2233         if (ret) {
2234                 hid_err(hdev, "Failed to enable the IMU; ret=%d\n", ret);
2235                 goto err_mutex;
2236         }
2237
2238         ret = joycon_read_info(ctlr);
2239         if (ret) {
2240                 hid_err(hdev, "Failed to retrieve controller info; ret=%d\n",
2241                         ret);
2242                 goto err_mutex;
2243         }
2244
2245         mutex_unlock(&ctlr->output_mutex);
2246
2247         /* Initialize the leds */
2248         ret = joycon_leds_create(ctlr);
2249         if (ret) {
2250                 hid_err(hdev, "Failed to create leds; ret=%d\n", ret);
2251                 goto err_close;
2252         }
2253
2254         /* Initialize the battery power supply */
2255         ret = joycon_power_supply_create(ctlr);
2256         if (ret) {
2257                 hid_err(hdev, "Failed to create power_supply; ret=%d\n", ret);
2258                 goto err_close;
2259         }
2260
2261         ret = joycon_input_create(ctlr);
2262         if (ret) {
2263                 hid_err(hdev, "Failed to create input device; ret=%d\n", ret);
2264                 goto err_close;
2265         }
2266
2267         ctlr->ctlr_state = JOYCON_CTLR_STATE_READ;
2268
2269         hid_dbg(hdev, "probe - success\n");
2270         return 0;
2271
2272 err_mutex:
2273         mutex_unlock(&ctlr->output_mutex);
2274 err_close:
2275         hid_hw_close(hdev);
2276 err_stop:
2277         hid_hw_stop(hdev);
2278 err_wq:
2279         destroy_workqueue(ctlr->rumble_queue);
2280 err:
2281         hid_err(hdev, "probe - fail = %d\n", ret);
2282         return ret;
2283 }
2284
2285 static void nintendo_hid_remove(struct hid_device *hdev)
2286 {
2287         struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
2288         unsigned long flags;
2289
2290         hid_dbg(hdev, "remove\n");
2291
2292         /* Prevent further attempts at sending subcommands. */
2293         spin_lock_irqsave(&ctlr->lock, flags);
2294         ctlr->ctlr_state = JOYCON_CTLR_STATE_REMOVED;
2295         spin_unlock_irqrestore(&ctlr->lock, flags);
2296
2297         destroy_workqueue(ctlr->rumble_queue);
2298
2299         hid_hw_close(hdev);
2300         hid_hw_stop(hdev);
2301 }
2302
2303 static const struct hid_device_id nintendo_hid_devices[] = {
2304         { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
2305                          USB_DEVICE_ID_NINTENDO_PROCON) },
2306         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2307                          USB_DEVICE_ID_NINTENDO_PROCON) },
2308         { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
2309                          USB_DEVICE_ID_NINTENDO_CHRGGRIP) },
2310         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2311                          USB_DEVICE_ID_NINTENDO_JOYCONL) },
2312         { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2313                          USB_DEVICE_ID_NINTENDO_JOYCONR) },
2314         { }
2315 };
2316 MODULE_DEVICE_TABLE(hid, nintendo_hid_devices);
2317
2318 static struct hid_driver nintendo_hid_driver = {
2319         .name           = "nintendo",
2320         .id_table       = nintendo_hid_devices,
2321         .probe          = nintendo_hid_probe,
2322         .remove         = nintendo_hid_remove,
2323         .raw_event      = nintendo_hid_event,
2324 };
2325 module_hid_driver(nintendo_hid_driver);
2326
2327 MODULE_LICENSE("GPL");
2328 MODULE_AUTHOR("Daniel J. Ogorchock <djogorchock@gmail.com>");
2329 MODULE_DESCRIPTION("Driver for Nintendo Switch Controllers");
2330