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2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 | // SPDX-License-Identifier: GPL-2.0+ /* * HID driver for Nintendo Switch Joy-Cons and Pro Controllers * * Copyright (c) 2019-2021 Daniel J. Ogorchock <djogorchock@gmail.com> * * The following resources/projects were referenced for this driver: * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering * https://gitlab.com/pjranki/joycon-linux-kernel (Peter Rankin) * https://github.com/FrotBot/SwitchProConLinuxUSB * https://github.com/MTCKC/ProconXInput * https://github.com/Davidobot/BetterJoyForCemu * hid-wiimote kernel hid driver * hid-logitech-hidpp driver * hid-sony driver * * This driver supports the Nintendo Switch Joy-Cons and Pro Controllers. The * Pro Controllers can either be used over USB or Bluetooth. * * The driver will retrieve the factory calibration info from the controllers, * so little to no user calibration should be required. * */ #include "hid-ids.h" #include <asm/unaligned.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/kernel.h> #include <linux/hid.h> #include <linux/input.h> #include <linux/jiffies.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/power_supply.h> #include <linux/spinlock.h> /* * Reference the url below for the following HID report defines: * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering */ /* Output Reports */ #define JC_OUTPUT_RUMBLE_AND_SUBCMD 0x01 #define JC_OUTPUT_FW_UPDATE_PKT 0x03 #define JC_OUTPUT_RUMBLE_ONLY 0x10 #define JC_OUTPUT_MCU_DATA 0x11 #define JC_OUTPUT_USB_CMD 0x80 /* Subcommand IDs */ #define JC_SUBCMD_STATE 0x00 #define JC_SUBCMD_MANUAL_BT_PAIRING 0x01 #define JC_SUBCMD_REQ_DEV_INFO 0x02 #define JC_SUBCMD_SET_REPORT_MODE 0x03 #define JC_SUBCMD_TRIGGERS_ELAPSED 0x04 #define JC_SUBCMD_GET_PAGE_LIST_STATE 0x05 #define JC_SUBCMD_SET_HCI_STATE 0x06 #define JC_SUBCMD_RESET_PAIRING_INFO 0x07 #define JC_SUBCMD_LOW_POWER_MODE 0x08 #define JC_SUBCMD_SPI_FLASH_READ 0x10 #define JC_SUBCMD_SPI_FLASH_WRITE 0x11 #define JC_SUBCMD_RESET_MCU 0x20 #define JC_SUBCMD_SET_MCU_CONFIG 0x21 #define JC_SUBCMD_SET_MCU_STATE 0x22 #define JC_SUBCMD_SET_PLAYER_LIGHTS 0x30 #define JC_SUBCMD_GET_PLAYER_LIGHTS 0x31 #define JC_SUBCMD_SET_HOME_LIGHT 0x38 #define JC_SUBCMD_ENABLE_IMU 0x40 #define JC_SUBCMD_SET_IMU_SENSITIVITY 0x41 #define JC_SUBCMD_WRITE_IMU_REG 0x42 #define JC_SUBCMD_READ_IMU_REG 0x43 #define JC_SUBCMD_ENABLE_VIBRATION 0x48 #define JC_SUBCMD_GET_REGULATED_VOLTAGE 0x50 /* Input Reports */ #define JC_INPUT_BUTTON_EVENT 0x3F #define JC_INPUT_SUBCMD_REPLY 0x21 #define JC_INPUT_IMU_DATA 0x30 #define JC_INPUT_MCU_DATA 0x31 #define JC_INPUT_USB_RESPONSE 0x81 /* Feature Reports */ #define JC_FEATURE_LAST_SUBCMD 0x02 #define JC_FEATURE_OTA_FW_UPGRADE 0x70 #define JC_FEATURE_SETUP_MEM_READ 0x71 #define JC_FEATURE_MEM_READ 0x72 #define JC_FEATURE_ERASE_MEM_SECTOR 0x73 #define JC_FEATURE_MEM_WRITE 0x74 #define JC_FEATURE_LAUNCH 0x75 /* USB Commands */ #define JC_USB_CMD_CONN_STATUS 0x01 #define JC_USB_CMD_HANDSHAKE 0x02 #define JC_USB_CMD_BAUDRATE_3M 0x03 #define JC_USB_CMD_NO_TIMEOUT 0x04 #define JC_USB_CMD_EN_TIMEOUT 0x05 #define JC_USB_RESET 0x06 #define JC_USB_PRE_HANDSHAKE 0x91 #define JC_USB_SEND_UART 0x92 /* Magic value denoting presence of user calibration */ #define JC_CAL_USR_MAGIC_0 0xB2 #define JC_CAL_USR_MAGIC_1 0xA1 #define JC_CAL_USR_MAGIC_SIZE 2 /* SPI storage addresses of user calibration data */ #define JC_CAL_USR_LEFT_MAGIC_ADDR 0x8010 #define JC_CAL_USR_LEFT_DATA_ADDR 0x8012 #define JC_CAL_USR_LEFT_DATA_END 0x801A #define JC_CAL_USR_RIGHT_MAGIC_ADDR 0x801B #define JC_CAL_USR_RIGHT_DATA_ADDR 0x801D #define JC_CAL_STICK_DATA_SIZE \ (JC_CAL_USR_LEFT_DATA_END - JC_CAL_USR_LEFT_DATA_ADDR + 1) /* SPI storage addresses of factory calibration data */ #define JC_CAL_FCT_DATA_LEFT_ADDR 0x603d #define JC_CAL_FCT_DATA_RIGHT_ADDR 0x6046 /* SPI storage addresses of IMU factory calibration data */ #define JC_IMU_CAL_FCT_DATA_ADDR 0x6020 #define JC_IMU_CAL_FCT_DATA_END 0x6037 #define JC_IMU_CAL_DATA_SIZE \ (JC_IMU_CAL_FCT_DATA_END - JC_IMU_CAL_FCT_DATA_ADDR + 1) /* SPI storage addresses of IMU user calibration data */ #define JC_IMU_CAL_USR_MAGIC_ADDR 0x8026 #define JC_IMU_CAL_USR_DATA_ADDR 0x8028 /* The raw analog joystick values will be mapped in terms of this magnitude */ #define JC_MAX_STICK_MAG 32767 #define JC_STICK_FUZZ 250 #define JC_STICK_FLAT 500 /* Hat values for pro controller's d-pad */ #define JC_MAX_DPAD_MAG 1 #define JC_DPAD_FUZZ 0 #define JC_DPAD_FLAT 0 /* Under most circumstances IMU reports are pushed every 15ms; use as default */ #define JC_IMU_DFLT_AVG_DELTA_MS 15 /* How many samples to sum before calculating average IMU report delta */ #define JC_IMU_SAMPLES_PER_DELTA_AVG 300 /* Controls how many dropped IMU packets at once trigger a warning message */ #define JC_IMU_DROPPED_PKT_WARNING 3 /* * The controller's accelerometer has a sensor resolution of 16bits and is * configured with a range of +-8000 milliGs. Therefore, the resolution can be * calculated thus: (2^16-1)/(8000 * 2) = 4.096 digits per milliG * Resolution per G (rather than per millliG): 4.096 * 1000 = 4096 digits per G * Alternatively: 1/4096 = .0002441 Gs per digit */ #define JC_IMU_MAX_ACCEL_MAG 32767 #define JC_IMU_ACCEL_RES_PER_G 4096 #define JC_IMU_ACCEL_FUZZ 10 #define JC_IMU_ACCEL_FLAT 0 /* * The controller's gyroscope has a sensor resolution of 16bits and is * configured with a range of +-2000 degrees/second. * Digits per dps: (2^16 -1)/(2000*2) = 16.38375 * dps per digit: 16.38375E-1 = .0610 * * STMicro recommends in the datasheet to add 15% to the dps/digit. This allows * the full sensitivity range to be saturated without clipping. This yields more * accurate results, so it's the technique this driver uses. * dps per digit (corrected): .0610 * 1.15 = .0702 * digits per dps (corrected): .0702E-1 = 14.247 * * Now, 14.247 truncating to 14 loses a lot of precision, so we rescale the * min/max range by 1000. */ #define JC_IMU_PREC_RANGE_SCALE 1000 /* Note: change mag and res_per_dps if prec_range_scale is ever altered */ #define JC_IMU_MAX_GYRO_MAG 32767000 /* (2^16-1)*1000 */ #define JC_IMU_GYRO_RES_PER_DPS 14247 /* (14.247*1000) */ #define JC_IMU_GYRO_FUZZ 10 #define JC_IMU_GYRO_FLAT 0 /* frequency/amplitude tables for rumble */ struct joycon_rumble_freq_data { u16 high; u8 low; u16 freq; /* Hz*/ }; struct joycon_rumble_amp_data { u8 high; u16 low; u16 amp; }; #if IS_ENABLED(CONFIG_NINTENDO_FF) /* * These tables are from * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering/blob/master/rumble_data_table.md */ static const struct joycon_rumble_freq_data joycon_rumble_frequencies[] = { /* high, low, freq */ { 0x0000, 0x01, 41 }, { 0x0000, 0x02, 42 }, { 0x0000, 0x03, 43 }, { 0x0000, 0x04, 44 }, { 0x0000, 0x05, 45 }, { 0x0000, 0x06, 46 }, { 0x0000, 0x07, 47 }, { 0x0000, 0x08, 48 }, { 0x0000, 0x09, 49 }, { 0x0000, 0x0A, 50 }, { 0x0000, 0x0B, 51 }, { 0x0000, 0x0C, 52 }, { 0x0000, 0x0D, 53 }, { 0x0000, 0x0E, 54 }, { 0x0000, 0x0F, 55 }, { 0x0000, 0x10, 57 }, { 0x0000, 0x11, 58 }, { 0x0000, 0x12, 59 }, { 0x0000, 0x13, 60 }, { 0x0000, 0x14, 62 }, { 0x0000, 0x15, 63 }, { 0x0000, 0x16, 64 }, { 0x0000, 0x17, 66 }, { 0x0000, 0x18, 67 }, { 0x0000, 0x19, 69 }, { 0x0000, 0x1A, 70 }, { 0x0000, 0x1B, 72 }, { 0x0000, 0x1C, 73 }, { 0x0000, 0x1D, 75 }, { 0x0000, 0x1e, 77 }, { 0x0000, 0x1f, 78 }, { 0x0000, 0x20, 80 }, { 0x0400, 0x21, 82 }, { 0x0800, 0x22, 84 }, { 0x0c00, 0x23, 85 }, { 0x1000, 0x24, 87 }, { 0x1400, 0x25, 89 }, { 0x1800, 0x26, 91 }, { 0x1c00, 0x27, 93 }, { 0x2000, 0x28, 95 }, { 0x2400, 0x29, 97 }, { 0x2800, 0x2a, 99 }, { 0x2c00, 0x2b, 102 }, { 0x3000, 0x2c, 104 }, { 0x3400, 0x2d, 106 }, { 0x3800, 0x2e, 108 }, { 0x3c00, 0x2f, 111 }, { 0x4000, 0x30, 113 }, { 0x4400, 0x31, 116 }, { 0x4800, 0x32, 118 }, { 0x4c00, 0x33, 121 }, { 0x5000, 0x34, 123 }, { 0x5400, 0x35, 126 }, { 0x5800, 0x36, 129 }, { 0x5c00, 0x37, 132 }, { 0x6000, 0x38, 135 }, { 0x6400, 0x39, 137 }, { 0x6800, 0x3a, 141 }, { 0x6c00, 0x3b, 144 }, { 0x7000, 0x3c, 147 }, { 0x7400, 0x3d, 150 }, { 0x7800, 0x3e, 153 }, { 0x7c00, 0x3f, 157 }, { 0x8000, 0x40, 160 }, { 0x8400, 0x41, 164 }, { 0x8800, 0x42, 167 }, { 0x8c00, 0x43, 171 }, { 0x9000, 0x44, 174 }, { 0x9400, 0x45, 178 }, { 0x9800, 0x46, 182 }, { 0x9c00, 0x47, 186 }, { 0xa000, 0x48, 190 }, { 0xa400, 0x49, 194 }, { 0xa800, 0x4a, 199 }, { 0xac00, 0x4b, 203 }, { 0xb000, 0x4c, 207 }, { 0xb400, 0x4d, 212 }, { 0xb800, 0x4e, 217 }, { 0xbc00, 0x4f, 221 }, { 0xc000, 0x50, 226 }, { 0xc400, 0x51, 231 }, { 0xc800, 0x52, 236 }, { 0xcc00, 0x53, 241 }, { 0xd000, 0x54, 247 }, { 0xd400, 0x55, 252 }, { 0xd800, 0x56, 258 }, { 0xdc00, 0x57, 263 }, { 0xe000, 0x58, 269 }, { 0xe400, 0x59, 275 }, { 0xe800, 0x5a, 281 }, { 0xec00, 0x5b, 287 }, { 0xf000, 0x5c, 293 }, { 0xf400, 0x5d, 300 }, { 0xf800, 0x5e, 306 }, { 0xfc00, 0x5f, 313 }, { 0x0001, 0x60, 320 }, { 0x0401, 0x61, 327 }, { 0x0801, 0x62, 334 }, { 0x0c01, 0x63, 341 }, { 0x1001, 0x64, 349 }, { 0x1401, 0x65, 357 }, { 0x1801, 0x66, 364 }, { 0x1c01, 0x67, 372 }, { 0x2001, 0x68, 381 }, { 0x2401, 0x69, 389 }, { 0x2801, 0x6a, 397 }, { 0x2c01, 0x6b, 406 }, { 0x3001, 0x6c, 415 }, { 0x3401, 0x6d, 424 }, { 0x3801, 0x6e, 433 }, { 0x3c01, 0x6f, 443 }, { 0x4001, 0x70, 453 }, { 0x4401, 0x71, 462 }, { 0x4801, 0x72, 473 }, { 0x4c01, 0x73, 483 }, { 0x5001, 0x74, 494 }, { 0x5401, 0x75, 504 }, { 0x5801, 0x76, 515 }, { 0x5c01, 0x77, 527 }, { 0x6001, 0x78, 538 }, { 0x6401, 0x79, 550 }, { 0x6801, 0x7a, 562 }, { 0x6c01, 0x7b, 574 }, { 0x7001, 0x7c, 587 }, { 0x7401, 0x7d, 600 }, { 0x7801, 0x7e, 613 }, { 0x7c01, 0x7f, 626 }, { 0x8001, 0x00, 640 }, { 0x8401, 0x00, 654 }, { 0x8801, 0x00, 668 }, { 0x8c01, 0x00, 683 }, { 0x9001, 0x00, 698 }, { 0x9401, 0x00, 713 }, { 0x9801, 0x00, 729 }, { 0x9c01, 0x00, 745 }, { 0xa001, 0x00, 761 }, { 0xa401, 0x00, 778 }, { 0xa801, 0x00, 795 }, { 0xac01, 0x00, 812 }, { 0xb001, 0x00, 830 }, { 0xb401, 0x00, 848 }, { 0xb801, 0x00, 867 }, { 0xbc01, 0x00, 886 }, { 0xc001, 0x00, 905 }, { 0xc401, 0x00, 925 }, { 0xc801, 0x00, 945 }, { 0xcc01, 0x00, 966 }, { 0xd001, 0x00, 987 }, { 0xd401, 0x00, 1009 }, { 0xd801, 0x00, 1031 }, { 0xdc01, 0x00, 1053 }, { 0xe001, 0x00, 1076 }, { 0xe401, 0x00, 1100 }, { 0xe801, 0x00, 1124 }, { 0xec01, 0x00, 1149 }, { 0xf001, 0x00, 1174 }, { 0xf401, 0x00, 1199 }, { 0xf801, 0x00, 1226 }, { 0xfc01, 0x00, 1253 } }; #define joycon_max_rumble_amp (1003) static const struct joycon_rumble_amp_data joycon_rumble_amplitudes[] = { /* high, low, amp */ { 0x00, 0x0040, 0 }, { 0x02, 0x8040, 10 }, { 0x04, 0x0041, 12 }, { 0x06, 0x8041, 14 }, { 0x08, 0x0042, 17 }, { 0x0a, 0x8042, 20 }, { 0x0c, 0x0043, 24 }, { 0x0e, 0x8043, 28 }, { 0x10, 0x0044, 33 }, { 0x12, 0x8044, 40 }, { 0x14, 0x0045, 47 }, { 0x16, 0x8045, 56 }, { 0x18, 0x0046, 67 }, { 0x1a, 0x8046, 80 }, { 0x1c, 0x0047, 95 }, { 0x1e, 0x8047, 112 }, { 0x20, 0x0048, 117 }, { 0x22, 0x8048, 123 }, { 0x24, 0x0049, 128 }, { 0x26, 0x8049, 134 }, { 0x28, 0x004a, 140 }, { 0x2a, 0x804a, 146 }, { 0x2c, 0x004b, 152 }, { 0x2e, 0x804b, 159 }, { 0x30, 0x004c, 166 }, { 0x32, 0x804c, 173 }, { 0x34, 0x004d, 181 }, { 0x36, 0x804d, 189 }, { 0x38, 0x004e, 198 }, { 0x3a, 0x804e, 206 }, { 0x3c, 0x004f, 215 }, { 0x3e, 0x804f, 225 }, { 0x40, 0x0050, 230 }, { 0x42, 0x8050, 235 }, { 0x44, 0x0051, 240 }, { 0x46, 0x8051, 245 }, { 0x48, 0x0052, 251 }, { 0x4a, 0x8052, 256 }, { 0x4c, 0x0053, 262 }, { 0x4e, 0x8053, 268 }, { 0x50, 0x0054, 273 }, { 0x52, 0x8054, 279 }, { 0x54, 0x0055, 286 }, { 0x56, 0x8055, 292 }, { 0x58, 0x0056, 298 }, { 0x5a, 0x8056, 305 }, { 0x5c, 0x0057, 311 }, { 0x5e, 0x8057, 318 }, { 0x60, 0x0058, 325 }, { 0x62, 0x8058, 332 }, { 0x64, 0x0059, 340 }, { 0x66, 0x8059, 347 }, { 0x68, 0x005a, 355 }, { 0x6a, 0x805a, 362 }, { 0x6c, 0x005b, 370 }, { 0x6e, 0x805b, 378 }, { 0x70, 0x005c, 387 }, { 0x72, 0x805c, 395 }, { 0x74, 0x005d, 404 }, { 0x76, 0x805d, 413 }, { 0x78, 0x005e, 422 }, { 0x7a, 0x805e, 431 }, { 0x7c, 0x005f, 440 }, { 0x7e, 0x805f, 450 }, { 0x80, 0x0060, 460 }, { 0x82, 0x8060, 470 }, { 0x84, 0x0061, 480 }, { 0x86, 0x8061, 491 }, { 0x88, 0x0062, 501 }, { 0x8a, 0x8062, 512 }, { 0x8c, 0x0063, 524 }, { 0x8e, 0x8063, 535 }, { 0x90, 0x0064, 547 }, { 0x92, 0x8064, 559 }, { 0x94, 0x0065, 571 }, { 0x96, 0x8065, 584 }, { 0x98, 0x0066, 596 }, { 0x9a, 0x8066, 609 }, { 0x9c, 0x0067, 623 }, { 0x9e, 0x8067, 636 }, { 0xa0, 0x0068, 650 }, { 0xa2, 0x8068, 665 }, { 0xa4, 0x0069, 679 }, { 0xa6, 0x8069, 694 }, { 0xa8, 0x006a, 709 }, { 0xaa, 0x806a, 725 }, { 0xac, 0x006b, 741 }, { 0xae, 0x806b, 757 }, { 0xb0, 0x006c, 773 }, { 0xb2, 0x806c, 790 }, { 0xb4, 0x006d, 808 }, { 0xb6, 0x806d, 825 }, { 0xb8, 0x006e, 843 }, { 0xba, 0x806e, 862 }, { 0xbc, 0x006f, 881 }, { 0xbe, 0x806f, 900 }, { 0xc0, 0x0070, 920 }, { 0xc2, 0x8070, 940 }, { 0xc4, 0x0071, 960 }, { 0xc6, 0x8071, 981 }, { 0xc8, 0x0072, joycon_max_rumble_amp } }; static const u16 JC_RUMBLE_DFLT_LOW_FREQ = 160; static const u16 JC_RUMBLE_DFLT_HIGH_FREQ = 320; static const unsigned short JC_RUMBLE_ZERO_AMP_PKT_CNT = 5; #endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */ static const u16 JC_RUMBLE_PERIOD_MS = 50; /* States for controller state machine */ enum joycon_ctlr_state { JOYCON_CTLR_STATE_INIT, JOYCON_CTLR_STATE_READ, JOYCON_CTLR_STATE_REMOVED, }; /* Controller type received as part of device info */ enum joycon_ctlr_type { JOYCON_CTLR_TYPE_JCL = 0x01, JOYCON_CTLR_TYPE_JCR = 0x02, JOYCON_CTLR_TYPE_PRO = 0x03, }; struct joycon_stick_cal { s32 max; s32 min; s32 center; }; struct joycon_imu_cal { s16 offset[3]; s16 scale[3]; }; /* * All the controller's button values are stored in a u32. * They can be accessed with bitwise ANDs. */ static const u32 JC_BTN_Y = BIT(0); static const u32 JC_BTN_X = BIT(1); static const u32 JC_BTN_B = BIT(2); static const u32 JC_BTN_A = BIT(3); static const u32 JC_BTN_SR_R = BIT(4); static const u32 JC_BTN_SL_R = BIT(5); static const u32 JC_BTN_R = BIT(6); static const u32 JC_BTN_ZR = BIT(7); static const u32 JC_BTN_MINUS = BIT(8); static const u32 JC_BTN_PLUS = BIT(9); static const u32 JC_BTN_RSTICK = BIT(10); static const u32 JC_BTN_LSTICK = BIT(11); static const u32 JC_BTN_HOME = BIT(12); static const u32 JC_BTN_CAP = BIT(13); /* capture button */ static const u32 JC_BTN_DOWN = BIT(16); static const u32 JC_BTN_UP = BIT(17); static const u32 JC_BTN_RIGHT = BIT(18); static const u32 JC_BTN_LEFT = BIT(19); static const u32 JC_BTN_SR_L = BIT(20); static const u32 JC_BTN_SL_L = BIT(21); static const u32 JC_BTN_L = BIT(22); static const u32 JC_BTN_ZL = BIT(23); enum joycon_msg_type { JOYCON_MSG_TYPE_NONE, JOYCON_MSG_TYPE_USB, JOYCON_MSG_TYPE_SUBCMD, }; struct joycon_rumble_output { u8 output_id; u8 packet_num; u8 rumble_data[8]; } __packed; struct joycon_subcmd_request { u8 output_id; /* must be 0x01 for subcommand, 0x10 for rumble only */ u8 packet_num; /* incremented every send */ u8 rumble_data[8]; u8 subcmd_id; u8 data[]; /* length depends on the subcommand */ } __packed; struct joycon_subcmd_reply { u8 ack; /* MSB 1 for ACK, 0 for NACK */ u8 id; /* id of requested subcmd */ u8 data[]; /* will be at most 35 bytes */ } __packed; struct joycon_imu_data { s16 accel_x; s16 accel_y; s16 accel_z; s16 gyro_x; s16 gyro_y; s16 gyro_z; } __packed; struct joycon_input_report { u8 id; u8 timer; u8 bat_con; /* battery and connection info */ u8 button_status[3]; u8 left_stick[3]; u8 right_stick[3]; u8 vibrator_report; union { struct joycon_subcmd_reply subcmd_reply; /* IMU input reports contain 3 samples */ u8 imu_raw_bytes[sizeof(struct joycon_imu_data) * 3]; }; } __packed; #define JC_MAX_RESP_SIZE (sizeof(struct joycon_input_report) + 35) #define JC_RUMBLE_DATA_SIZE 8 #define JC_RUMBLE_QUEUE_SIZE 8 static const char * const joycon_player_led_names[] = { LED_FUNCTION_PLAYER1, LED_FUNCTION_PLAYER2, LED_FUNCTION_PLAYER3, LED_FUNCTION_PLAYER4, }; #define JC_NUM_LEDS ARRAY_SIZE(joycon_player_led_names) /* Each physical controller is associated with a joycon_ctlr struct */ struct joycon_ctlr { struct hid_device *hdev; struct input_dev *input; struct led_classdev leds[JC_NUM_LEDS]; /* player leds */ struct led_classdev home_led; enum joycon_ctlr_state ctlr_state; spinlock_t lock; u8 mac_addr[6]; char *mac_addr_str; enum joycon_ctlr_type ctlr_type; /* The following members are used for synchronous sends/receives */ enum joycon_msg_type msg_type; u8 subcmd_num; struct mutex output_mutex; u8 input_buf[JC_MAX_RESP_SIZE]; wait_queue_head_t wait; bool received_resp; u8 usb_ack_match; u8 subcmd_ack_match; bool received_input_report; unsigned int last_subcmd_sent_msecs; /* factory calibration data */ struct joycon_stick_cal left_stick_cal_x; struct joycon_stick_cal left_stick_cal_y; struct joycon_stick_cal right_stick_cal_x; struct joycon_stick_cal right_stick_cal_y; struct joycon_imu_cal accel_cal; struct joycon_imu_cal gyro_cal; /* prevents needlessly recalculating these divisors every sample */ s32 imu_cal_accel_divisor[3]; s32 imu_cal_gyro_divisor[3]; /* power supply data */ struct power_supply *battery; struct power_supply_desc battery_desc; u8 battery_capacity; bool battery_charging; bool host_powered; /* rumble */ u8 rumble_data[JC_RUMBLE_QUEUE_SIZE][JC_RUMBLE_DATA_SIZE]; int rumble_queue_head; int rumble_queue_tail; struct workqueue_struct *rumble_queue; struct work_struct rumble_worker; unsigned int rumble_msecs; u16 rumble_ll_freq; u16 rumble_lh_freq; u16 rumble_rl_freq; u16 rumble_rh_freq; unsigned short rumble_zero_countdown; /* imu */ struct input_dev *imu_input; bool imu_first_packet_received; /* helps in initiating timestamp */ unsigned int imu_timestamp_us; /* timestamp we report to userspace */ unsigned int imu_last_pkt_ms; /* used to calc imu report delta */ /* the following are used to track the average imu report time delta */ unsigned int imu_delta_samples_count; unsigned int imu_delta_samples_sum; unsigned int imu_avg_delta_ms; }; /* Helper macros for checking controller type */ #define jc_type_is_joycon(ctlr) \ (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL || \ ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR || \ ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP) #define jc_type_is_procon(ctlr) \ (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_PROCON) #define jc_type_is_chrggrip(ctlr) \ (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP) /* Does this controller have inputs associated with left joycon? */ #define jc_type_has_left(ctlr) \ (ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCL || \ ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO) /* Does this controller have inputs associated with right joycon? */ #define jc_type_has_right(ctlr) \ (ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCR || \ ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO) static int __joycon_hid_send(struct hid_device *hdev, u8 *data, size_t len) { u8 *buf; int ret; buf = kmemdup(data, len, GFP_KERNEL); if (!buf) return -ENOMEM; ret = hid_hw_output_report(hdev, buf, len); kfree(buf); if (ret < 0) hid_dbg(hdev, "Failed to send output report ret=%d\n", ret); return ret; } static void joycon_wait_for_input_report(struct joycon_ctlr *ctlr) { int ret; /* * If we are in the proper reporting mode, wait for an input * report prior to sending the subcommand. This improves * reliability considerably. */ if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) { unsigned long flags; spin_lock_irqsave(&ctlr->lock, flags); ctlr->received_input_report = false; spin_unlock_irqrestore(&ctlr->lock, flags); ret = wait_event_timeout(ctlr->wait, ctlr->received_input_report, HZ / 4); /* We will still proceed, even with a timeout here */ if (!ret) hid_warn(ctlr->hdev, "timeout waiting for input report\n"); } } /* * Sending subcommands and/or rumble data at too high a rate can cause bluetooth * controller disconnections. */ static void joycon_enforce_subcmd_rate(struct joycon_ctlr *ctlr) { static const unsigned int max_subcmd_rate_ms = 25; unsigned int current_ms = jiffies_to_msecs(jiffies); unsigned int delta_ms = current_ms - ctlr->last_subcmd_sent_msecs; while (delta_ms < max_subcmd_rate_ms && ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) { joycon_wait_for_input_report(ctlr); current_ms = jiffies_to_msecs(jiffies); delta_ms = current_ms - ctlr->last_subcmd_sent_msecs; } ctlr->last_subcmd_sent_msecs = current_ms; } static int joycon_hid_send_sync(struct joycon_ctlr *ctlr, u8 *data, size_t len, u32 timeout) { int ret; int tries = 2; /* * The controller occasionally seems to drop subcommands. In testing, * doing one retry after a timeout appears to always work. */ while (tries--) { joycon_enforce_subcmd_rate(ctlr); ret = __joycon_hid_send(ctlr->hdev, data, len); if (ret < 0) { memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE); return ret; } ret = wait_event_timeout(ctlr->wait, ctlr->received_resp, timeout); if (!ret) { hid_dbg(ctlr->hdev, "synchronous send/receive timed out\n"); if (tries) { hid_dbg(ctlr->hdev, "retrying sync send after timeout\n"); } memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE); ret = -ETIMEDOUT; } else { ret = 0; break; } } ctlr->received_resp = false; return ret; } static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd, u32 timeout) { int ret; u8 buf[2] = {JC_OUTPUT_USB_CMD}; buf[1] = cmd; ctlr->usb_ack_match = cmd; ctlr->msg_type = JOYCON_MSG_TYPE_USB; ret = joycon_hid_send_sync(ctlr, buf, sizeof(buf), timeout); if (ret) hid_dbg(ctlr->hdev, "send usb command failed; ret=%d\n", ret); return ret; } static int joycon_send_subcmd(struct joycon_ctlr *ctlr, struct joycon_subcmd_request *subcmd, size_t data_len, u32 timeout) { int ret; unsigned long flags; spin_lock_irqsave(&ctlr->lock, flags); /* * If the controller has been removed, just return ENODEV so the LED * subsystem doesn't print invalid errors on removal. */ if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) { spin_unlock_irqrestore(&ctlr->lock, flags); return -ENODEV; } memcpy(subcmd->rumble_data, ctlr->rumble_data[ctlr->rumble_queue_tail], JC_RUMBLE_DATA_SIZE); spin_unlock_irqrestore(&ctlr->lock, flags); subcmd->output_id = JC_OUTPUT_RUMBLE_AND_SUBCMD; subcmd->packet_num = ctlr->subcmd_num; if (++ctlr->subcmd_num > 0xF) ctlr->subcmd_num = 0; ctlr->subcmd_ack_match = subcmd->subcmd_id; ctlr->msg_type = JOYCON_MSG_TYPE_SUBCMD; ret = joycon_hid_send_sync(ctlr, (u8 *)subcmd, sizeof(*subcmd) + data_len, timeout); if (ret < 0) hid_dbg(ctlr->hdev, "send subcommand failed; ret=%d\n", ret); else ret = 0; return ret; } /* Supply nibbles for flash and on. Ones correspond to active */ static int joycon_set_player_leds(struct joycon_ctlr *ctlr, u8 flash, u8 on) { struct joycon_subcmd_request *req; u8 buffer[sizeof(*req) + 1] = { 0 }; req = (struct joycon_subcmd_request *)buffer; req->subcmd_id = JC_SUBCMD_SET_PLAYER_LIGHTS; req->data[0] = (flash << 4) | on; hid_dbg(ctlr->hdev, "setting player leds\n"); return joycon_send_subcmd(ctlr, req, 1, HZ/4); } static int joycon_request_spi_flash_read(struct joycon_ctlr *ctlr, u32 start_addr, u8 size, u8 **reply) { struct joycon_subcmd_request *req; struct joycon_input_report *report; u8 buffer[sizeof(*req) + 5] = { 0 }; u8 *data; int ret; if (!reply) return -EINVAL; req = (struct joycon_subcmd_request *)buffer; req->subcmd_id = JC_SUBCMD_SPI_FLASH_READ; data = req->data; put_unaligned_le32(start_addr, data); data[4] = size; hid_dbg(ctlr->hdev, "requesting SPI flash data\n"); ret = joycon_send_subcmd(ctlr, req, 5, HZ); if (ret) { hid_err(ctlr->hdev, "failed reading SPI flash; ret=%d\n", ret); } else { report = (struct joycon_input_report *)ctlr->input_buf; /* The read data starts at the 6th byte */ *reply = &report->subcmd_reply.data[5]; } return ret; } /* * User calibration's presence is denoted with a magic byte preceding it. * returns 0 if magic val is present, 1 if not present, < 0 on error */ static int joycon_check_for_cal_magic(struct joycon_ctlr *ctlr, u32 flash_addr) { int ret; u8 *reply; ret = joycon_request_spi_flash_read(ctlr, flash_addr, JC_CAL_USR_MAGIC_SIZE, &reply); if (ret) return ret; return reply[0] != JC_CAL_USR_MAGIC_0 || reply[1] != JC_CAL_USR_MAGIC_1; } static int joycon_read_stick_calibration(struct joycon_ctlr *ctlr, u16 cal_addr, struct joycon_stick_cal *cal_x, struct joycon_stick_cal *cal_y, bool left_stick) { s32 x_max_above; s32 x_min_below; s32 y_max_above; s32 y_min_below; u8 *raw_cal; int ret; ret = joycon_request_spi_flash_read(ctlr, cal_addr, JC_CAL_STICK_DATA_SIZE, &raw_cal); if (ret) return ret; /* stick calibration parsing: note the order differs based on stick */ if (left_stick) { x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0, 12); y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4, 12); cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0, 12); cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4, 12); x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0, 12); y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4, 12); } else { cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0, 12); cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4, 12); x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0, 12); y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4, 12); x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0, 12); y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4, 12); } cal_x->max = cal_x->center + x_max_above; cal_x->min = cal_x->center - x_min_below; cal_y->max = cal_y->center + y_max_above; cal_y->min = cal_y->center - y_min_below; /* check if calibration values are plausible */ if (cal_x->min >= cal_x->center || cal_x->center >= cal_x->max || cal_y->min >= cal_y->center || cal_y->center >= cal_y->max) ret = -EINVAL; return ret; } static const u16 DFLT_STICK_CAL_CEN = 2000; static const u16 DFLT_STICK_CAL_MAX = 3500; static const u16 DFLT_STICK_CAL_MIN = 500; static void joycon_use_default_calibration(struct hid_device *hdev, struct joycon_stick_cal *cal_x, struct joycon_stick_cal *cal_y, const char *stick, int ret) { hid_warn(hdev, "Failed to read %s stick cal, using defaults; e=%d\n", stick, ret); cal_x->center = cal_y->center = DFLT_STICK_CAL_CEN; cal_x->max = cal_y->max = DFLT_STICK_CAL_MAX; cal_x->min = cal_y->min = DFLT_STICK_CAL_MIN; } static int joycon_request_calibration(struct joycon_ctlr *ctlr) { u16 left_stick_addr = JC_CAL_FCT_DATA_LEFT_ADDR; u16 right_stick_addr = JC_CAL_FCT_DATA_RIGHT_ADDR; int ret; hid_dbg(ctlr->hdev, "requesting cal data\n"); /* check if user stick calibrations are present */ if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_LEFT_MAGIC_ADDR)) { left_stick_addr = JC_CAL_USR_LEFT_DATA_ADDR; hid_info(ctlr->hdev, "using user cal for left stick\n"); } else { hid_info(ctlr->hdev, "using factory cal for left stick\n"); } if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_RIGHT_MAGIC_ADDR)) { right_stick_addr = JC_CAL_USR_RIGHT_DATA_ADDR; hid_info(ctlr->hdev, "using user cal for right stick\n"); } else { hid_info(ctlr->hdev, "using factory cal for right stick\n"); } /* read the left stick calibration data */ ret = joycon_read_stick_calibration(ctlr, left_stick_addr, &ctlr->left_stick_cal_x, &ctlr->left_stick_cal_y, true); if (ret) joycon_use_default_calibration(ctlr->hdev, &ctlr->left_stick_cal_x, &ctlr->left_stick_cal_y, "left", ret); /* read the right stick calibration data */ ret = joycon_read_stick_calibration(ctlr, right_stick_addr, &ctlr->right_stick_cal_x, &ctlr->right_stick_cal_y, false); if (ret) joycon_use_default_calibration(ctlr->hdev, &ctlr->right_stick_cal_x, &ctlr->right_stick_cal_y, "right", ret); hid_dbg(ctlr->hdev, "calibration:\n" "l_x_c=%d l_x_max=%d l_x_min=%d\n" "l_y_c=%d l_y_max=%d l_y_min=%d\n" "r_x_c=%d r_x_max=%d r_x_min=%d\n" "r_y_c=%d r_y_max=%d r_y_min=%d\n", ctlr->left_stick_cal_x.center, ctlr->left_stick_cal_x.max, ctlr->left_stick_cal_x.min, ctlr->left_stick_cal_y.center, ctlr->left_stick_cal_y.max, ctlr->left_stick_cal_y.min, ctlr->right_stick_cal_x.center, ctlr->right_stick_cal_x.max, ctlr->right_stick_cal_x.min, ctlr->right_stick_cal_y.center, ctlr->right_stick_cal_y.max, ctlr->right_stick_cal_y.min); return 0; } /* * These divisors are calculated once rather than for each sample. They are only * dependent on the IMU calibration values. They are used when processing the * IMU input reports. */ static void joycon_calc_imu_cal_divisors(struct joycon_ctlr *ctlr) { int i; for (i = 0; i < 3; i++) { ctlr->imu_cal_accel_divisor[i] = ctlr->accel_cal.scale[i] - ctlr->accel_cal.offset[i]; ctlr->imu_cal_gyro_divisor[i] = ctlr->gyro_cal.scale[i] - ctlr->gyro_cal.offset[i]; } } static const s16 DFLT_ACCEL_OFFSET /*= 0*/; static const s16 DFLT_ACCEL_SCALE = 16384; static const s16 DFLT_GYRO_OFFSET /*= 0*/; static const s16 DFLT_GYRO_SCALE = 13371; static int joycon_request_imu_calibration(struct joycon_ctlr *ctlr) { u16 imu_cal_addr = JC_IMU_CAL_FCT_DATA_ADDR; u8 *raw_cal; int ret; int i; /* check if user calibration exists */ if (!joycon_check_for_cal_magic(ctlr, JC_IMU_CAL_USR_MAGIC_ADDR)) { imu_cal_addr = JC_IMU_CAL_USR_DATA_ADDR; hid_info(ctlr->hdev, "using user cal for IMU\n"); } else { hid_info(ctlr->hdev, "using factory cal for IMU\n"); } /* request IMU calibration data */ hid_dbg(ctlr->hdev, "requesting IMU cal data\n"); ret = joycon_request_spi_flash_read(ctlr, imu_cal_addr, JC_IMU_CAL_DATA_SIZE, &raw_cal); if (ret) { hid_warn(ctlr->hdev, "Failed to read IMU cal, using defaults; ret=%d\n", ret); for (i = 0; i < 3; i++) { ctlr->accel_cal.offset[i] = DFLT_ACCEL_OFFSET; ctlr->accel_cal.scale[i] = DFLT_ACCEL_SCALE; ctlr->gyro_cal.offset[i] = DFLT_GYRO_OFFSET; ctlr->gyro_cal.scale[i] = DFLT_GYRO_SCALE; } joycon_calc_imu_cal_divisors(ctlr); return ret; } /* IMU calibration parsing */ for (i = 0; i < 3; i++) { int j = i * 2; ctlr->accel_cal.offset[i] = get_unaligned_le16(raw_cal + j); ctlr->accel_cal.scale[i] = get_unaligned_le16(raw_cal + j + 6); ctlr->gyro_cal.offset[i] = get_unaligned_le16(raw_cal + j + 12); ctlr->gyro_cal.scale[i] = get_unaligned_le16(raw_cal + j + 18); } joycon_calc_imu_cal_divisors(ctlr); hid_dbg(ctlr->hdev, "IMU calibration:\n" "a_o[0]=%d a_o[1]=%d a_o[2]=%d\n" "a_s[0]=%d a_s[1]=%d a_s[2]=%d\n" "g_o[0]=%d g_o[1]=%d g_o[2]=%d\n" "g_s[0]=%d g_s[1]=%d g_s[2]=%d\n", ctlr->accel_cal.offset[0], ctlr->accel_cal.offset[1], ctlr->accel_cal.offset[2], ctlr->accel_cal.scale[0], ctlr->accel_cal.scale[1], ctlr->accel_cal.scale[2], ctlr->gyro_cal.offset[0], ctlr->gyro_cal.offset[1], ctlr->gyro_cal.offset[2], ctlr->gyro_cal.scale[0], ctlr->gyro_cal.scale[1], ctlr->gyro_cal.scale[2]); return 0; } static int joycon_set_report_mode(struct joycon_ctlr *ctlr) { struct joycon_subcmd_request *req; u8 buffer[sizeof(*req) + 1] = { 0 }; req = (struct joycon_subcmd_request *)buffer; req->subcmd_id = JC_SUBCMD_SET_REPORT_MODE; req->data[0] = 0x30; /* standard, full report mode */ hid_dbg(ctlr->hdev, "setting controller report mode\n"); return joycon_send_subcmd(ctlr, req, 1, HZ); } static int joycon_enable_rumble(struct joycon_ctlr *ctlr) { struct joycon_subcmd_request *req; u8 buffer[sizeof(*req) + 1] = { 0 }; req = (struct joycon_subcmd_request *)buffer; req->subcmd_id = JC_SUBCMD_ENABLE_VIBRATION; req->data[0] = 0x01; /* note: 0x00 would disable */ hid_dbg(ctlr->hdev, "enabling rumble\n"); return joycon_send_subcmd(ctlr, req, 1, HZ/4); } static int joycon_enable_imu(struct joycon_ctlr *ctlr) { struct joycon_subcmd_request *req; u8 buffer[sizeof(*req) + 1] = { 0 }; req = (struct joycon_subcmd_request *)buffer; req->subcmd_id = JC_SUBCMD_ENABLE_IMU; req->data[0] = 0x01; /* note: 0x00 would disable */ hid_dbg(ctlr->hdev, "enabling IMU\n"); return joycon_send_subcmd(ctlr, req, 1, HZ); } static s32 joycon_map_stick_val(struct joycon_stick_cal *cal, s32 val) { s32 center = cal->center; s32 min = cal->min; s32 max = cal->max; s32 new_val; if (val > center) { new_val = (val - center) * JC_MAX_STICK_MAG; new_val /= (max - center); } else { new_val = (center - val) * -JC_MAX_STICK_MAG; new_val /= (center - min); } new_val = clamp(new_val, (s32)-JC_MAX_STICK_MAG, (s32)JC_MAX_STICK_MAG); return new_val; } static void joycon_input_report_parse_imu_data(struct joycon_ctlr *ctlr, struct joycon_input_report *rep, struct joycon_imu_data *imu_data) { u8 *raw = rep->imu_raw_bytes; int i; for (i = 0; i < 3; i++) { struct joycon_imu_data *data = &imu_data[i]; data->accel_x = get_unaligned_le16(raw + 0); data->accel_y = get_unaligned_le16(raw + 2); data->accel_z = get_unaligned_le16(raw + 4); data->gyro_x = get_unaligned_le16(raw + 6); data->gyro_y = get_unaligned_le16(raw + 8); data->gyro_z = get_unaligned_le16(raw + 10); /* point to next imu sample */ raw += sizeof(struct joycon_imu_data); } } static void joycon_parse_imu_report(struct joycon_ctlr *ctlr, struct joycon_input_report *rep) { struct joycon_imu_data imu_data[3] = {0}; /* 3 reports per packet */ struct input_dev *idev = ctlr->imu_input; unsigned int msecs = jiffies_to_msecs(jiffies); unsigned int last_msecs = ctlr->imu_last_pkt_ms; int i; int value[6]; joycon_input_report_parse_imu_data(ctlr, rep, imu_data); /* * There are complexities surrounding how we determine the timestamps we * associate with the samples we pass to userspace. The IMU input * reports do not provide us with a good timestamp. There's a quickly * incrementing 8-bit counter per input report, but it is not very * useful for this purpose (it is not entirely clear what rate it * increments at or if it varies based on packet push rate - more on * the push rate below...). * * The reverse engineering work done on the joy-cons and pro controllers * by the community seems to indicate the following: * - The controller samples the IMU every 1.35ms. It then does some of * its own processing, probably averaging the samples out. * - Each imu input report contains 3 IMU samples, (usually 5ms apart). * - In the standard reporting mode (which this driver uses exclusively) * input reports are pushed from the controller as follows: * * joy-con (bluetooth): every 15 ms * * joy-cons (in charging grip via USB): every 15 ms * * pro controller (USB): every 15 ms * * pro controller (bluetooth): every 8 ms (this is the wildcard) * * Further complicating matters is that some bluetooth stacks are known * to alter the controller's packet rate by hardcoding the bluetooth * SSR for the switch controllers (android's stack currently sets the * SSR to 11ms for both the joy-cons and pro controllers). * * In my own testing, I've discovered that my pro controller either * reports IMU sample batches every 11ms or every 15ms. This rate is * stable after connecting. It isn't 100% clear what determines this * rate. Importantly, even when sending every 11ms, none of the samples * are duplicates. This seems to indicate that the time deltas between * reported samples can vary based on the input report rate. * * The solution employed in this driver is to keep track of the average * time delta between IMU input reports. In testing, this value has * proven to be stable, staying at 15ms or 11ms, though other hardware * configurations and bluetooth stacks could potentially see other rates * (hopefully this will become more clear as more people use the * driver). * * Keeping track of the average report delta allows us to submit our * timestamps to userspace based on that. Each report contains 3 * samples, so the IMU sampling rate should be avg_time_delta/3. We can * also use this average to detect events where we have dropped a * packet. The userspace timestamp for the samples will be adjusted * accordingly to prevent unwanted behvaior. */ if (!ctlr->imu_first_packet_received) { ctlr->imu_timestamp_us = 0; ctlr->imu_delta_samples_count = 0; ctlr->imu_delta_samples_sum = 0; ctlr->imu_avg_delta_ms = JC_IMU_DFLT_AVG_DELTA_MS; ctlr->imu_first_packet_received = true; } else { unsigned int delta = msecs - last_msecs; unsigned int dropped_pkts; unsigned int dropped_threshold; /* avg imu report delta housekeeping */ ctlr->imu_delta_samples_sum += delta; ctlr->imu_delta_samples_count++; if (ctlr->imu_delta_samples_count >= JC_IMU_SAMPLES_PER_DELTA_AVG) { ctlr->imu_avg_delta_ms = ctlr->imu_delta_samples_sum / ctlr->imu_delta_samples_count; /* don't ever want divide by zero shenanigans */ if (ctlr->imu_avg_delta_ms == 0) { ctlr->imu_avg_delta_ms = 1; hid_warn(ctlr->hdev, "calculated avg imu delta of 0\n"); } ctlr->imu_delta_samples_count = 0; ctlr->imu_delta_samples_sum = 0; } /* useful for debugging IMU sample rate */ hid_dbg(ctlr->hdev, "imu_report: ms=%u last_ms=%u delta=%u avg_delta=%u\n", msecs, last_msecs, delta, ctlr->imu_avg_delta_ms); /* check if any packets have been dropped */ dropped_threshold = ctlr->imu_avg_delta_ms * 3 / 2; dropped_pkts = (delta - min(delta, dropped_threshold)) / ctlr->imu_avg_delta_ms; ctlr->imu_timestamp_us += 1000 * ctlr->imu_avg_delta_ms; if (dropped_pkts > JC_IMU_DROPPED_PKT_WARNING) { hid_warn(ctlr->hdev, "compensating for %u dropped IMU reports\n", dropped_pkts); hid_warn(ctlr->hdev, "delta=%u avg_delta=%u\n", delta, ctlr->imu_avg_delta_ms); } } ctlr->imu_last_pkt_ms = msecs; /* Each IMU input report contains three samples */ for (i = 0; i < 3; i++) { input_event(idev, EV_MSC, MSC_TIMESTAMP, ctlr->imu_timestamp_us); /* * These calculations (which use the controller's calibration * settings to improve the final values) are based on those * found in the community's reverse-engineering repo (linked at * top of driver). For hid-nintendo, we make sure that the final * value given to userspace is always in terms of the axis * resolution we provided. * * Currently only the gyro calculations subtract the calibration * offsets from the raw value itself. In testing, doing the same * for the accelerometer raw values decreased accuracy. * * Note that the gyro values are multiplied by the * precision-saving scaling factor to prevent large inaccuracies * due to truncation of the resolution value which would * otherwise occur. To prevent overflow (without resorting to 64 * bit integer math), the mult_frac macro is used. */ value[0] = mult_frac((JC_IMU_PREC_RANGE_SCALE * (imu_data[i].gyro_x - ctlr->gyro_cal.offset[0])), ctlr->gyro_cal.scale[0], ctlr->imu_cal_gyro_divisor[0]); value[1] = mult_frac((JC_IMU_PREC_RANGE_SCALE * (imu_data[i].gyro_y - ctlr->gyro_cal.offset[1])), ctlr->gyro_cal.scale[1], ctlr->imu_cal_gyro_divisor[1]); value[2] = mult_frac((JC_IMU_PREC_RANGE_SCALE * (imu_data[i].gyro_z - ctlr->gyro_cal.offset[2])), ctlr->gyro_cal.scale[2], ctlr->imu_cal_gyro_divisor[2]); value[3] = ((s32)imu_data[i].accel_x * ctlr->accel_cal.scale[0]) / ctlr->imu_cal_accel_divisor[0]; value[4] = ((s32)imu_data[i].accel_y * ctlr->accel_cal.scale[1]) / ctlr->imu_cal_accel_divisor[1]; value[5] = ((s32)imu_data[i].accel_z * ctlr->accel_cal.scale[2]) / ctlr->imu_cal_accel_divisor[2]; hid_dbg(ctlr->hdev, "raw_gyro: g_x=%d g_y=%d g_z=%d\n", imu_data[i].gyro_x, imu_data[i].gyro_y, imu_data[i].gyro_z); hid_dbg(ctlr->hdev, "raw_accel: a_x=%d a_y=%d a_z=%d\n", imu_data[i].accel_x, imu_data[i].accel_y, imu_data[i].accel_z); /* * The right joy-con has 2 axes negated, Y and Z. This is due to * the orientation of the IMU in the controller. We negate those * axes' values in order to be consistent with the left joy-con * and the pro controller: * X: positive is pointing toward the triggers * Y: positive is pointing to the left * Z: positive is pointing up (out of the buttons/sticks) * The axes follow the right-hand rule. */ if (jc_type_is_joycon(ctlr) && jc_type_has_right(ctlr)) { int j; /* negate all but x axis */ for (j = 1; j < 6; ++j) { if (j == 3) continue; value[j] *= -1; } } input_report_abs(idev, ABS_RX, value[0]); input_report_abs(idev, ABS_RY, value[1]); input_report_abs(idev, ABS_RZ, value[2]); input_report_abs(idev, ABS_X, value[3]); input_report_abs(idev, ABS_Y, value[4]); input_report_abs(idev, ABS_Z, value[5]); input_sync(idev); /* convert to micros and divide by 3 (3 samples per report). */ ctlr->imu_timestamp_us += ctlr->imu_avg_delta_ms * 1000 / 3; } } static void joycon_parse_report(struct joycon_ctlr *ctlr, struct joycon_input_report *rep) { struct input_dev *dev = ctlr->input; unsigned long flags; u8 tmp; u32 btns; unsigned long msecs = jiffies_to_msecs(jiffies); spin_lock_irqsave(&ctlr->lock, flags); if (IS_ENABLED(CONFIG_NINTENDO_FF) && rep->vibrator_report && ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED && (msecs - ctlr->rumble_msecs) >= JC_RUMBLE_PERIOD_MS && (ctlr->rumble_queue_head != ctlr->rumble_queue_tail || ctlr->rumble_zero_countdown > 0)) { /* * When this value reaches 0, we know we've sent multiple * packets to the controller instructing it to disable rumble. * We can safely stop sending periodic rumble packets until the * next ff effect. */ if (ctlr->rumble_zero_countdown > 0) ctlr->rumble_zero_countdown--; queue_work(ctlr->rumble_queue, &ctlr->rumble_worker); } /* Parse the battery status */ tmp = rep->bat_con; ctlr->host_powered = tmp & BIT(0); ctlr->battery_charging = tmp & BIT(4); tmp = tmp >> 5; switch (tmp) { case 0: /* empty */ ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; break; case 1: /* low */ ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_LOW; break; case 2: /* medium */ ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; break; case 3: /* high */ ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; break; case 4: /* full */ ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_FULL; break; default: ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; hid_warn(ctlr->hdev, "Invalid battery status\n"); break; } spin_unlock_irqrestore(&ctlr->lock, flags); /* Parse the buttons and sticks */ btns = hid_field_extract(ctlr->hdev, rep->button_status, 0, 24); if (jc_type_has_left(ctlr)) { u16 raw_x; u16 raw_y; s32 x; s32 y; /* get raw stick values */ raw_x = hid_field_extract(ctlr->hdev, rep->left_stick, 0, 12); raw_y = hid_field_extract(ctlr->hdev, rep->left_stick + 1, 4, 12); /* map the stick values */ x = joycon_map_stick_val(&ctlr->left_stick_cal_x, raw_x); y = -joycon_map_stick_val(&ctlr->left_stick_cal_y, raw_y); /* report sticks */ input_report_abs(dev, ABS_X, x); input_report_abs(dev, ABS_Y, y); /* report buttons */ input_report_key(dev, BTN_TL, btns & JC_BTN_L); input_report_key(dev, BTN_TL2, btns & JC_BTN_ZL); input_report_key(dev, BTN_SELECT, btns & JC_BTN_MINUS); input_report_key(dev, BTN_THUMBL, btns & JC_BTN_LSTICK); input_report_key(dev, BTN_Z, btns & JC_BTN_CAP); if (jc_type_is_joycon(ctlr)) { /* Report the S buttons as the non-existent triggers */ input_report_key(dev, BTN_TR, btns & JC_BTN_SL_L); input_report_key(dev, BTN_TR2, btns & JC_BTN_SR_L); /* Report d-pad as digital buttons for the joy-cons */ input_report_key(dev, BTN_DPAD_DOWN, btns & JC_BTN_DOWN); input_report_key(dev, BTN_DPAD_UP, btns & JC_BTN_UP); input_report_key(dev, BTN_DPAD_RIGHT, btns & JC_BTN_RIGHT); input_report_key(dev, BTN_DPAD_LEFT, btns & JC_BTN_LEFT); } else { int hatx = 0; int haty = 0; /* d-pad x */ if (btns & JC_BTN_LEFT) hatx = -1; else if (btns & JC_BTN_RIGHT) hatx = 1; input_report_abs(dev, ABS_HAT0X, hatx); /* d-pad y */ if (btns & JC_BTN_UP) haty = -1; else if (btns & JC_BTN_DOWN) haty = 1; input_report_abs(dev, ABS_HAT0Y, haty); } } if (jc_type_has_right(ctlr)) { u16 raw_x; u16 raw_y; s32 x; s32 y; /* get raw stick values */ raw_x = hid_field_extract(ctlr->hdev, rep->right_stick, 0, 12); raw_y = hid_field_extract(ctlr->hdev, rep->right_stick + 1, 4, 12); /* map stick values */ x = joycon_map_stick_val(&ctlr->right_stick_cal_x, raw_x); y = -joycon_map_stick_val(&ctlr->right_stick_cal_y, raw_y); /* report sticks */ input_report_abs(dev, ABS_RX, x); input_report_abs(dev, ABS_RY, y); /* report buttons */ input_report_key(dev, BTN_TR, btns & JC_BTN_R); input_report_key(dev, BTN_TR2, btns & JC_BTN_ZR); if (jc_type_is_joycon(ctlr)) { /* Report the S buttons as the non-existent triggers */ input_report_key(dev, BTN_TL, btns & JC_BTN_SL_R); input_report_key(dev, BTN_TL2, btns & JC_BTN_SR_R); } input_report_key(dev, BTN_START, btns & JC_BTN_PLUS); input_report_key(dev, BTN_THUMBR, btns & JC_BTN_RSTICK); input_report_key(dev, BTN_MODE, btns & JC_BTN_HOME); input_report_key(dev, BTN_WEST, btns & JC_BTN_Y); input_report_key(dev, BTN_NORTH, btns & JC_BTN_X); input_report_key(dev, BTN_EAST, btns & JC_BTN_A); input_report_key(dev, BTN_SOUTH, btns & JC_BTN_B); } input_sync(dev); /* * Immediately after receiving a report is the most reliable time to * send a subcommand to the controller. Wake any subcommand senders * waiting for a report. */ if (unlikely(mutex_is_locked(&ctlr->output_mutex))) { spin_lock_irqsave(&ctlr->lock, flags); ctlr->received_input_report = true; spin_unlock_irqrestore(&ctlr->lock, flags); wake_up(&ctlr->wait); } /* parse IMU data if present */ if (rep->id == JC_INPUT_IMU_DATA) joycon_parse_imu_report(ctlr, rep); } static int joycon_send_rumble_data(struct joycon_ctlr *ctlr) { int ret; unsigned long flags; struct joycon_rumble_output rumble_output = { 0 }; spin_lock_irqsave(&ctlr->lock, flags); /* * If the controller has been removed, just return ENODEV so the LED * subsystem doesn't print invalid errors on removal. */ if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) { spin_unlock_irqrestore(&ctlr->lock, flags); return -ENODEV; } memcpy(rumble_output.rumble_data, ctlr->rumble_data[ctlr->rumble_queue_tail], JC_RUMBLE_DATA_SIZE); spin_unlock_irqrestore(&ctlr->lock, flags); rumble_output.output_id = JC_OUTPUT_RUMBLE_ONLY; rumble_output.packet_num = ctlr->subcmd_num; if (++ctlr->subcmd_num > 0xF) ctlr->subcmd_num = 0; joycon_enforce_subcmd_rate(ctlr); ret = __joycon_hid_send(ctlr->hdev, (u8 *)&rumble_output, sizeof(rumble_output)); return ret; } static void joycon_rumble_worker(struct work_struct *work) { struct joycon_ctlr *ctlr = container_of(work, struct joycon_ctlr, rumble_worker); unsigned long flags; bool again = true; int ret; while (again) { mutex_lock(&ctlr->output_mutex); ret = joycon_send_rumble_data(ctlr); mutex_unlock(&ctlr->output_mutex); /* -ENODEV means the controller was just unplugged */ spin_lock_irqsave(&ctlr->lock, flags); if (ret < 0 && ret != -ENODEV && ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED) hid_warn(ctlr->hdev, "Failed to set rumble; e=%d", ret); ctlr->rumble_msecs = jiffies_to_msecs(jiffies); if (ctlr->rumble_queue_tail != ctlr->rumble_queue_head) { if (++ctlr->rumble_queue_tail >= JC_RUMBLE_QUEUE_SIZE) ctlr->rumble_queue_tail = 0; } else { again = false; } spin_unlock_irqrestore(&ctlr->lock, flags); } } #if IS_ENABLED(CONFIG_NINTENDO_FF) static struct joycon_rumble_freq_data joycon_find_rumble_freq(u16 freq) { const size_t length = ARRAY_SIZE(joycon_rumble_frequencies); const struct joycon_rumble_freq_data *data = joycon_rumble_frequencies; int i = 0; if (freq > data[0].freq) { for (i = 1; i < length - 1; i++) { if (freq > data[i - 1].freq && freq <= data[i].freq) break; } } return data[i]; } static struct joycon_rumble_amp_data joycon_find_rumble_amp(u16 amp) { const size_t length = ARRAY_SIZE(joycon_rumble_amplitudes); const struct joycon_rumble_amp_data *data = joycon_rumble_amplitudes; int i = 0; if (amp > data[0].amp) { for (i = 1; i < length - 1; i++) { if (amp > data[i - 1].amp && amp <= data[i].amp) break; } } return data[i]; } static void joycon_encode_rumble(u8 *data, u16 freq_low, u16 freq_high, u16 amp) { struct joycon_rumble_freq_data freq_data_low; struct joycon_rumble_freq_data freq_data_high; struct joycon_rumble_amp_data amp_data; freq_data_low = joycon_find_rumble_freq(freq_low); freq_data_high = joycon_find_rumble_freq(freq_high); amp_data = joycon_find_rumble_amp(amp); data[0] = (freq_data_high.high >> 8) & 0xFF; data[1] = (freq_data_high.high & 0xFF) + amp_data.high; data[2] = freq_data_low.low + ((amp_data.low >> 8) & 0xFF); data[3] = amp_data.low & 0xFF; } static const u16 JOYCON_MAX_RUMBLE_HIGH_FREQ = 1253; static const u16 JOYCON_MIN_RUMBLE_HIGH_FREQ = 82; static const u16 JOYCON_MAX_RUMBLE_LOW_FREQ = 626; static const u16 JOYCON_MIN_RUMBLE_LOW_FREQ = 41; static void joycon_clamp_rumble_freqs(struct joycon_ctlr *ctlr) { unsigned long flags; spin_lock_irqsave(&ctlr->lock, flags); ctlr->rumble_ll_freq = clamp(ctlr->rumble_ll_freq, JOYCON_MIN_RUMBLE_LOW_FREQ, JOYCON_MAX_RUMBLE_LOW_FREQ); ctlr->rumble_lh_freq = clamp(ctlr->rumble_lh_freq, JOYCON_MIN_RUMBLE_HIGH_FREQ, JOYCON_MAX_RUMBLE_HIGH_FREQ); ctlr->rumble_rl_freq = clamp(ctlr->rumble_rl_freq, JOYCON_MIN_RUMBLE_LOW_FREQ, JOYCON_MAX_RUMBLE_LOW_FREQ); ctlr->rumble_rh_freq = clamp(ctlr->rumble_rh_freq, JOYCON_MIN_RUMBLE_HIGH_FREQ, JOYCON_MAX_RUMBLE_HIGH_FREQ); spin_unlock_irqrestore(&ctlr->lock, flags); } static int joycon_set_rumble(struct joycon_ctlr *ctlr, u16 amp_r, u16 amp_l, bool schedule_now) { u8 data[JC_RUMBLE_DATA_SIZE]; u16 amp; u16 freq_r_low; u16 freq_r_high; u16 freq_l_low; u16 freq_l_high; unsigned long flags; spin_lock_irqsave(&ctlr->lock, flags); freq_r_low = ctlr->rumble_rl_freq; freq_r_high = ctlr->rumble_rh_freq; freq_l_low = ctlr->rumble_ll_freq; freq_l_high = ctlr->rumble_lh_freq; /* limit number of silent rumble packets to reduce traffic */ if (amp_l != 0 || amp_r != 0) ctlr->rumble_zero_countdown = JC_RUMBLE_ZERO_AMP_PKT_CNT; spin_unlock_irqrestore(&ctlr->lock, flags); /* right joy-con */ amp = amp_r * (u32)joycon_max_rumble_amp / 65535; joycon_encode_rumble(data + 4, freq_r_low, freq_r_high, amp); /* left joy-con */ amp = amp_l * (u32)joycon_max_rumble_amp / 65535; joycon_encode_rumble(data, freq_l_low, freq_l_high, amp); spin_lock_irqsave(&ctlr->lock, flags); if (++ctlr->rumble_queue_head >= JC_RUMBLE_QUEUE_SIZE) ctlr->rumble_queue_head = 0; memcpy(ctlr->rumble_data[ctlr->rumble_queue_head], data, JC_RUMBLE_DATA_SIZE); /* don't wait for the periodic send (reduces latency) */ if (schedule_now && ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED) queue_work(ctlr->rumble_queue, &ctlr->rumble_worker); spin_unlock_irqrestore(&ctlr->lock, flags); return 0; } static int joycon_play_effect(struct input_dev *dev, void *data, struct ff_effect *effect) { struct joycon_ctlr *ctlr = input_get_drvdata(dev); if (effect->type != FF_RUMBLE) return 0; return joycon_set_rumble(ctlr, effect->u.rumble.weak_magnitude, effect->u.rumble.strong_magnitude, true); } #endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */ static const unsigned int joycon_button_inputs_l[] = { BTN_SELECT, BTN_Z, BTN_THUMBL, BTN_TL, BTN_TL2, 0 /* 0 signals end of array */ }; static const unsigned int joycon_button_inputs_r[] = { BTN_START, BTN_MODE, BTN_THUMBR, BTN_SOUTH, BTN_EAST, BTN_NORTH, BTN_WEST, BTN_TR, BTN_TR2, 0 /* 0 signals end of array */ }; /* We report joy-con d-pad inputs as buttons and pro controller as a hat. */ static const unsigned int joycon_dpad_inputs_jc[] = { BTN_DPAD_UP, BTN_DPAD_DOWN, BTN_DPAD_LEFT, BTN_DPAD_RIGHT, 0 /* 0 signals end of array */ }; static int joycon_input_create(struct joycon_ctlr *ctlr) { struct hid_device *hdev; const char *name; const char *imu_name; int ret; int i; hdev = ctlr->hdev; switch (hdev->product) { case USB_DEVICE_ID_NINTENDO_PROCON: name = "Nintendo Switch Pro Controller"; imu_name = "Nintendo Switch Pro Controller IMU"; break; case USB_DEVICE_ID_NINTENDO_CHRGGRIP: if (jc_type_has_left(ctlr)) { name = "Nintendo Switch Left Joy-Con (Grip)"; imu_name = "Nintendo Switch Left Joy-Con IMU (Grip)"; } else { name = "Nintendo Switch Right Joy-Con (Grip)"; imu_name = "Nintendo Switch Right Joy-Con IMU (Grip)"; } break; case USB_DEVICE_ID_NINTENDO_JOYCONL: name = "Nintendo Switch Left Joy-Con"; imu_name = "Nintendo Switch Left Joy-Con IMU"; break; case USB_DEVICE_ID_NINTENDO_JOYCONR: name = "Nintendo Switch Right Joy-Con"; imu_name = "Nintendo Switch Right Joy-Con IMU"; break; default: /* Should be impossible */ hid_err(hdev, "Invalid hid product\n"); return -EINVAL; } ctlr->input = devm_input_allocate_device(&hdev->dev); if (!ctlr->input) return -ENOMEM; ctlr->input->id.bustype = hdev->bus; ctlr->input->id.vendor = hdev->vendor; ctlr->input->id.product = hdev->product; ctlr->input->id.version = hdev->version; ctlr->input->uniq = ctlr->mac_addr_str; ctlr->input->name = name; ctlr->input->phys = hdev->phys; input_set_drvdata(ctlr->input, ctlr); /* set up sticks and buttons */ if (jc_type_has_left(ctlr)) { input_set_abs_params(ctlr->input, ABS_X, -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG, JC_STICK_FUZZ, JC_STICK_FLAT); input_set_abs_params(ctlr->input, ABS_Y, -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG, JC_STICK_FUZZ, JC_STICK_FLAT); for (i = 0; joycon_button_inputs_l[i] > 0; i++) input_set_capability(ctlr->input, EV_KEY, joycon_button_inputs_l[i]); /* configure d-pad differently for joy-con vs pro controller */ if (hdev->product != USB_DEVICE_ID_NINTENDO_PROCON) { for (i = 0; joycon_dpad_inputs_jc[i] > 0; i++) input_set_capability(ctlr->input, EV_KEY, joycon_dpad_inputs_jc[i]); } else { input_set_abs_params(ctlr->input, ABS_HAT0X, -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG, JC_DPAD_FUZZ, JC_DPAD_FLAT); input_set_abs_params(ctlr->input, ABS_HAT0Y, -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG, JC_DPAD_FUZZ, JC_DPAD_FLAT); } } if (jc_type_has_right(ctlr)) { input_set_abs_params(ctlr->input, ABS_RX, -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG, JC_STICK_FUZZ, JC_STICK_FLAT); input_set_abs_params(ctlr->input, ABS_RY, -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG, JC_STICK_FUZZ, JC_STICK_FLAT); for (i = 0; joycon_button_inputs_r[i] > 0; i++) input_set_capability(ctlr->input, EV_KEY, joycon_button_inputs_r[i]); } /* Let's report joy-con S triggers separately */ if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL) { input_set_capability(ctlr->input, EV_KEY, BTN_TR); input_set_capability(ctlr->input, EV_KEY, BTN_TR2); } else if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR) { input_set_capability(ctlr->input, EV_KEY, BTN_TL); input_set_capability(ctlr->input, EV_KEY, BTN_TL2); } #if IS_ENABLED(CONFIG_NINTENDO_FF) /* set up rumble */ input_set_capability(ctlr->input, EV_FF, FF_RUMBLE); input_ff_create_memless(ctlr->input, NULL, joycon_play_effect); ctlr->rumble_ll_freq = JC_RUMBLE_DFLT_LOW_FREQ; ctlr->rumble_lh_freq = JC_RUMBLE_DFLT_HIGH_FREQ; ctlr->rumble_rl_freq = JC_RUMBLE_DFLT_LOW_FREQ; ctlr->rumble_rh_freq = JC_RUMBLE_DFLT_HIGH_FREQ; joycon_clamp_rumble_freqs(ctlr); joycon_set_rumble(ctlr, 0, 0, false); ctlr->rumble_msecs = jiffies_to_msecs(jiffies); #endif ret = input_register_device(ctlr->input); if (ret) return ret; /* configure the imu input device */ ctlr->imu_input = devm_input_allocate_device(&hdev->dev); if (!ctlr->imu_input) return -ENOMEM; ctlr->imu_input->id.bustype = hdev->bus; ctlr->imu_input->id.vendor = hdev->vendor; ctlr->imu_input->id.product = hdev->product; ctlr->imu_input->id.version = hdev->version; ctlr->imu_input->uniq = ctlr->mac_addr_str; ctlr->imu_input->name = imu_name; ctlr->imu_input->phys = hdev->phys; input_set_drvdata(ctlr->imu_input, ctlr); /* configure imu axes */ input_set_abs_params(ctlr->imu_input, ABS_X, -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG, JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT); input_set_abs_params(ctlr->imu_input, ABS_Y, -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG, JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT); input_set_abs_params(ctlr->imu_input, ABS_Z, -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG, JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT); input_abs_set_res(ctlr->imu_input, ABS_X, JC_IMU_ACCEL_RES_PER_G); input_abs_set_res(ctlr->imu_input, ABS_Y, JC_IMU_ACCEL_RES_PER_G); input_abs_set_res(ctlr->imu_input, ABS_Z, JC_IMU_ACCEL_RES_PER_G); input_set_abs_params(ctlr->imu_input, ABS_RX, -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG, JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT); input_set_abs_params(ctlr->imu_input, ABS_RY, -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG, JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT); input_set_abs_params(ctlr->imu_input, ABS_RZ, -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG, JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT); input_abs_set_res(ctlr->imu_input, ABS_RX, JC_IMU_GYRO_RES_PER_DPS); input_abs_set_res(ctlr->imu_input, ABS_RY, JC_IMU_GYRO_RES_PER_DPS); input_abs_set_res(ctlr->imu_input, ABS_RZ, JC_IMU_GYRO_RES_PER_DPS); __set_bit(EV_MSC, ctlr->imu_input->evbit); __set_bit(MSC_TIMESTAMP, ctlr->imu_input->mscbit); __set_bit(INPUT_PROP_ACCELEROMETER, ctlr->imu_input->propbit); ret = input_register_device(ctlr->imu_input); if (ret) return ret; return 0; } static int joycon_player_led_brightness_set(struct led_classdev *led, enum led_brightness brightness) { struct device *dev = led->dev->parent; struct hid_device *hdev = to_hid_device(dev); struct joycon_ctlr *ctlr; int val = 0; int i; int ret; int num; ctlr = hid_get_drvdata(hdev); if (!ctlr) { hid_err(hdev, "No controller data\n"); return -ENODEV; } /* determine which player led this is */ for (num = 0; num < JC_NUM_LEDS; num++) { if (&ctlr->leds[num] == led) break; } if (num >= JC_NUM_LEDS) return -EINVAL; mutex_lock(&ctlr->output_mutex); for (i = 0; i < JC_NUM_LEDS; i++) { if (i == num) val |= brightness << i; else val |= ctlr->leds[i].brightness << i; } ret = joycon_set_player_leds(ctlr, 0, val); mutex_unlock(&ctlr->output_mutex); return ret; } static int joycon_home_led_brightness_set(struct led_classdev *led, enum led_brightness brightness) { struct device *dev = led->dev->parent; struct hid_device *hdev = to_hid_device(dev); struct joycon_ctlr *ctlr; struct joycon_subcmd_request *req; u8 buffer[sizeof(*req) + 5] = { 0 }; u8 *data; int ret; ctlr = hid_get_drvdata(hdev); if (!ctlr) { hid_err(hdev, "No controller data\n"); return -ENODEV; } req = (struct joycon_subcmd_request *)buffer; req->subcmd_id = JC_SUBCMD_SET_HOME_LIGHT; data = req->data; data[0] = 0x01; data[1] = brightness << 4; data[2] = brightness | (brightness << 4); data[3] = 0x11; data[4] = 0x11; hid_dbg(hdev, "setting home led brightness\n"); mutex_lock(&ctlr->output_mutex); ret = joycon_send_subcmd(ctlr, req, 5, HZ/4); mutex_unlock(&ctlr->output_mutex); return ret; } static DEFINE_MUTEX(joycon_input_num_mutex); static int joycon_leds_create(struct joycon_ctlr *ctlr) { struct hid_device *hdev = ctlr->hdev; struct device *dev = &hdev->dev; const char *d_name = dev_name(dev); struct led_classdev *led; char *name; int ret = 0; int i; static int input_num = 1; /* Set the default controller player leds based on controller number */ mutex_lock(&joycon_input_num_mutex); mutex_lock(&ctlr->output_mutex); ret = joycon_set_player_leds(ctlr, 0, 0xF >> (4 - input_num)); if (ret) hid_warn(ctlr->hdev, "Failed to set leds; ret=%d\n", ret); mutex_unlock(&ctlr->output_mutex); /* configure the player LEDs */ for (i = 0; i < JC_NUM_LEDS; i++) { name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s", d_name, "green", joycon_player_led_names[i]); if (!name) { mutex_unlock(&joycon_input_num_mutex); return -ENOMEM; } led = &ctlr->leds[i]; led->name = name; led->brightness = ((i + 1) <= input_num) ? 1 : 0; led->max_brightness = 1; led->brightness_set_blocking = joycon_player_led_brightness_set; led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE; ret = devm_led_classdev_register(&hdev->dev, led); if (ret) { hid_err(hdev, "Failed registering %s LED\n", led->name); mutex_unlock(&joycon_input_num_mutex); return ret; } } if (++input_num > 4) input_num = 1; mutex_unlock(&joycon_input_num_mutex); /* configure the home LED */ if (jc_type_has_right(ctlr)) { name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s", d_name, "blue", LED_FUNCTION_PLAYER5); if (!name) return -ENOMEM; led = &ctlr->home_led; led->name = name; led->brightness = 0; led->max_brightness = 0xF; led->brightness_set_blocking = joycon_home_led_brightness_set; led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE; ret = devm_led_classdev_register(&hdev->dev, led); if (ret) { hid_err(hdev, "Failed registering home led\n"); return ret; } /* Set the home LED to 0 as default state */ ret = joycon_home_led_brightness_set(led, 0); if (ret) { hid_warn(hdev, "Failed to set home LED default, unregistering home LED"); devm_led_classdev_unregister(&hdev->dev, led); } } return 0; } static int joycon_battery_get_property(struct power_supply *supply, enum power_supply_property prop, union power_supply_propval *val) { struct joycon_ctlr *ctlr = power_supply_get_drvdata(supply); unsigned long flags; int ret = 0; u8 capacity; bool charging; bool powered; spin_lock_irqsave(&ctlr->lock, flags); capacity = ctlr->battery_capacity; charging = ctlr->battery_charging; powered = ctlr->host_powered; spin_unlock_irqrestore(&ctlr->lock, flags); switch (prop) { case POWER_SUPPLY_PROP_PRESENT: val->intval = 1; break; case POWER_SUPPLY_PROP_SCOPE: val->intval = POWER_SUPPLY_SCOPE_DEVICE; break; case POWER_SUPPLY_PROP_CAPACITY_LEVEL: val->intval = capacity; break; case POWER_SUPPLY_PROP_STATUS: if (charging) val->intval = POWER_SUPPLY_STATUS_CHARGING; else if (capacity == POWER_SUPPLY_CAPACITY_LEVEL_FULL && powered) val->intval = POWER_SUPPLY_STATUS_FULL; else val->intval = POWER_SUPPLY_STATUS_DISCHARGING; break; default: ret = -EINVAL; break; } return ret; } static enum power_supply_property joycon_battery_props[] = { POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_CAPACITY_LEVEL, POWER_SUPPLY_PROP_SCOPE, POWER_SUPPLY_PROP_STATUS, }; static int joycon_power_supply_create(struct joycon_ctlr *ctlr) { struct hid_device *hdev = ctlr->hdev; struct power_supply_config supply_config = { .drv_data = ctlr, }; const char * const name_fmt = "nintendo_switch_controller_battery_%s"; int ret = 0; /* Set initially to unknown before receiving first input report */ ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; /* Configure the battery's description */ ctlr->battery_desc.properties = joycon_battery_props; ctlr->battery_desc.num_properties = ARRAY_SIZE(joycon_battery_props); ctlr->battery_desc.get_property = joycon_battery_get_property; ctlr->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY; ctlr->battery_desc.use_for_apm = 0; ctlr->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL, name_fmt, dev_name(&hdev->dev)); if (!ctlr->battery_desc.name) return -ENOMEM; ctlr->battery = devm_power_supply_register(&hdev->dev, &ctlr->battery_desc, &supply_config); if (IS_ERR(ctlr->battery)) { ret = PTR_ERR(ctlr->battery); hid_err(hdev, "Failed to register battery; ret=%d\n", ret); return ret; } return power_supply_powers(ctlr->battery, &hdev->dev); } static int joycon_read_info(struct joycon_ctlr *ctlr) { int ret; int i; int j; struct joycon_subcmd_request req = { 0 }; struct joycon_input_report *report; req.subcmd_id = JC_SUBCMD_REQ_DEV_INFO; ret = joycon_send_subcmd(ctlr, &req, 0, HZ); if (ret) { hid_err(ctlr->hdev, "Failed to get joycon info; ret=%d\n", ret); return ret; } report = (struct joycon_input_report *)ctlr->input_buf; for (i = 4, j = 0; j < 6; i++, j++) ctlr->mac_addr[j] = report->subcmd_reply.data[i]; ctlr->mac_addr_str = devm_kasprintf(&ctlr->hdev->dev, GFP_KERNEL, "%02X:%02X:%02X:%02X:%02X:%02X", ctlr->mac_addr[0], ctlr->mac_addr[1], ctlr->mac_addr[2], ctlr->mac_addr[3], ctlr->mac_addr[4], ctlr->mac_addr[5]); if (!ctlr->mac_addr_str) return -ENOMEM; hid_info(ctlr->hdev, "controller MAC = %s\n", ctlr->mac_addr_str); /* Retrieve the type so we can distinguish for charging grip */ ctlr->ctlr_type = report->subcmd_reply.data[2]; return 0; } /* Common handler for parsing inputs */ static int joycon_ctlr_read_handler(struct joycon_ctlr *ctlr, u8 *data, int size) { if (data[0] == JC_INPUT_SUBCMD_REPLY || data[0] == JC_INPUT_IMU_DATA || data[0] == JC_INPUT_MCU_DATA) { if (size >= 12) /* make sure it contains the input report */ joycon_parse_report(ctlr, (struct joycon_input_report *)data); } return 0; } static int joycon_ctlr_handle_event(struct joycon_ctlr *ctlr, u8 *data, int size) { int ret = 0; bool match = false; struct joycon_input_report *report; if (unlikely(mutex_is_locked(&ctlr->output_mutex)) && ctlr->msg_type != JOYCON_MSG_TYPE_NONE) { switch (ctlr->msg_type) { case JOYCON_MSG_TYPE_USB: if (size < 2) break; if (data[0] == JC_INPUT_USB_RESPONSE && data[1] == ctlr->usb_ack_match) match = true; break; case JOYCON_MSG_TYPE_SUBCMD: if (size < sizeof(struct joycon_input_report) || data[0] != JC_INPUT_SUBCMD_REPLY) break; report = (struct joycon_input_report *)data; if (report->subcmd_reply.id == ctlr->subcmd_ack_match) match = true; break; default: break; } if (match) { memcpy(ctlr->input_buf, data, min(size, (int)JC_MAX_RESP_SIZE)); ctlr->msg_type = JOYCON_MSG_TYPE_NONE; ctlr->received_resp = true; wake_up(&ctlr->wait); /* This message has been handled */ return 1; } } if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) ret = joycon_ctlr_read_handler(ctlr, data, size); return ret; } static int nintendo_hid_event(struct hid_device *hdev, struct hid_report *report, u8 *raw_data, int size) { struct joycon_ctlr *ctlr = hid_get_drvdata(hdev); if (size < 1) return -EINVAL; return joycon_ctlr_handle_event(ctlr, raw_data, size); } static int nintendo_hid_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret; struct joycon_ctlr *ctlr; hid_dbg(hdev, "probe - start\n"); ctlr = devm_kzalloc(&hdev->dev, sizeof(*ctlr), GFP_KERNEL); if (!ctlr) { ret = -ENOMEM; goto err; } ctlr->hdev = hdev; ctlr->ctlr_state = JOYCON_CTLR_STATE_INIT; ctlr->rumble_queue_head = JC_RUMBLE_QUEUE_SIZE - 1; ctlr->rumble_queue_tail = 0; hid_set_drvdata(hdev, ctlr); mutex_init(&ctlr->output_mutex); init_waitqueue_head(&ctlr->wait); spin_lock_init(&ctlr->lock); ctlr->rumble_queue = alloc_workqueue("hid-nintendo-rumble_wq", WQ_FREEZABLE | WQ_MEM_RECLAIM, 0); if (!ctlr->rumble_queue) { ret = -ENOMEM; goto err; } INIT_WORK(&ctlr->rumble_worker, joycon_rumble_worker); ret = hid_parse(hdev); if (ret) { hid_err(hdev, "HID parse failed\n"); goto err_wq; } /* * Patch the hw version of pro controller/joycons, so applications can * distinguish between the default HID mappings and the mappings defined * by the Linux game controller spec. This is important for the SDL2 * library, which has a game controller database, which uses device ids * in combination with version as a key. */ hdev->version |= 0x8000; ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW); if (ret) { hid_err(hdev, "HW start failed\n"); goto err_wq; } ret = hid_hw_open(hdev); if (ret) { hid_err(hdev, "cannot start hardware I/O\n"); goto err_stop; } hid_device_io_start(hdev); /* Initialize the controller */ mutex_lock(&ctlr->output_mutex); /* if handshake command fails, assume ble pro controller */ if ((jc_type_is_procon(ctlr) || jc_type_is_chrggrip(ctlr)) && !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ)) { hid_dbg(hdev, "detected USB controller\n"); /* set baudrate for improved latency */ ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M, HZ); if (ret) { hid_err(hdev, "Failed to set baudrate; ret=%d\n", ret); goto err_mutex; } /* handshake */ ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ); if (ret) { hid_err(hdev, "Failed handshake; ret=%d\n", ret); goto err_mutex; } /* * Set no timeout (to keep controller in USB mode). * This doesn't send a response, so ignore the timeout. */ joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT, HZ/10); } else if (jc_type_is_chrggrip(ctlr)) { hid_err(hdev, "Failed charging grip handshake\n"); ret = -ETIMEDOUT; goto err_mutex; } /* get controller calibration data, and parse it */ ret = joycon_request_calibration(ctlr); if (ret) { /* * We can function with default calibration, but it may be * inaccurate. Provide a warning, and continue on. */ hid_warn(hdev, "Analog stick positions may be inaccurate\n"); } /* get IMU calibration data, and parse it */ ret = joycon_request_imu_calibration(ctlr); if (ret) { /* * We can function with default calibration, but it may be * inaccurate. Provide a warning, and continue on. */ hid_warn(hdev, "Unable to read IMU calibration data\n"); } /* Set the reporting mode to 0x30, which is the full report mode */ ret = joycon_set_report_mode(ctlr); if (ret) { hid_err(hdev, "Failed to set report mode; ret=%d\n", ret); goto err_mutex; } /* Enable rumble */ ret = joycon_enable_rumble(ctlr); if (ret) { hid_err(hdev, "Failed to enable rumble; ret=%d\n", ret); goto err_mutex; } /* Enable the IMU */ ret = joycon_enable_imu(ctlr); if (ret) { hid_err(hdev, "Failed to enable the IMU; ret=%d\n", ret); goto err_mutex; } ret = joycon_read_info(ctlr); if (ret) { hid_err(hdev, "Failed to retrieve controller info; ret=%d\n", ret); goto err_mutex; } mutex_unlock(&ctlr->output_mutex); /* Initialize the leds */ ret = joycon_leds_create(ctlr); if (ret) { hid_err(hdev, "Failed to create leds; ret=%d\n", ret); goto err_close; } /* Initialize the battery power supply */ ret = joycon_power_supply_create(ctlr); if (ret) { hid_err(hdev, "Failed to create power_supply; ret=%d\n", ret); goto err_close; } ret = joycon_input_create(ctlr); if (ret) { hid_err(hdev, "Failed to create input device; ret=%d\n", ret); goto err_close; } ctlr->ctlr_state = JOYCON_CTLR_STATE_READ; hid_dbg(hdev, "probe - success\n"); return 0; err_mutex: mutex_unlock(&ctlr->output_mutex); err_close: hid_hw_close(hdev); err_stop: hid_hw_stop(hdev); err_wq: destroy_workqueue(ctlr->rumble_queue); err: hid_err(hdev, "probe - fail = %d\n", ret); return ret; } static void nintendo_hid_remove(struct hid_device *hdev) { struct joycon_ctlr *ctlr = hid_get_drvdata(hdev); unsigned long flags; hid_dbg(hdev, "remove\n"); /* Prevent further attempts at sending subcommands. */ spin_lock_irqsave(&ctlr->lock, flags); ctlr->ctlr_state = JOYCON_CTLR_STATE_REMOVED; spin_unlock_irqrestore(&ctlr->lock, flags); destroy_workqueue(ctlr->rumble_queue); hid_hw_close(hdev); hid_hw_stop(hdev); } static const struct hid_device_id nintendo_hid_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_PROCON) }, { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_PROCON) }, { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_CHRGGRIP) }, { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_JOYCONL) }, { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_JOYCONR) }, { } }; MODULE_DEVICE_TABLE(hid, nintendo_hid_devices); static struct hid_driver nintendo_hid_driver = { .name = "nintendo", .id_table = nintendo_hid_devices, .probe = nintendo_hid_probe, .remove = nintendo_hid_remove, .raw_event = nintendo_hid_event, }; module_hid_driver(nintendo_hid_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Daniel J. Ogorchock <djogorchock@gmail.com>"); MODULE_DESCRIPTION("Driver for Nintendo Switch Controllers"); |