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 #define JC_NUM_LED_PATTERNS 8 414 /* Taken from https://www.nintendo.com/my/support/qa/detail/33822 */ 415 static const enum led_brightness joycon_player_led_patterns[JC_NUM_LED_PATTERNS][JC_NUM_LEDS] = { 416 { 1, 0, 0, 0 }, 417 { 1, 1, 0, 0 }, 418 { 1, 1, 1, 0 }, 419 { 1, 1, 1, 1 }, 420 { 1, 0, 0, 1 }, 421 { 1, 0, 1, 0 }, 422 { 1, 0, 1, 1 }, 423 { 0, 1, 1, 0 }, 424 }; 425 426 /* Each physical controller is associated with a joycon_ctlr struct */ 427 struct joycon_ctlr { 428 struct hid_device *hdev; 429 struct input_dev *input; 430 struct led_classdev leds[JC_NUM_LEDS]; /* player leds */ 431 struct led_classdev home_led; 432 enum joycon_ctlr_state ctlr_state; 433 spinlock_t lock; 434 u8 mac_addr[6]; 435 char *mac_addr_str; 436 enum joycon_ctlr_type ctlr_type; 437 438 /* The following members are used for synchronous sends/receives */ 439 enum joycon_msg_type msg_type; 440 u8 subcmd_num; 441 struct mutex output_mutex; 442 u8 input_buf[JC_MAX_RESP_SIZE]; 443 wait_queue_head_t wait; 444 bool received_resp; 445 u8 usb_ack_match; 446 u8 subcmd_ack_match; 447 bool received_input_report; 448 unsigned int last_input_report_msecs; 449 unsigned int last_subcmd_sent_msecs; 450 unsigned int consecutive_valid_report_deltas; 451 452 /* factory calibration data */ 453 struct joycon_stick_cal left_stick_cal_x; 454 struct joycon_stick_cal left_stick_cal_y; 455 struct joycon_stick_cal right_stick_cal_x; 456 struct joycon_stick_cal right_stick_cal_y; 457 458 struct joycon_imu_cal accel_cal; 459 struct joycon_imu_cal gyro_cal; 460 461 /* prevents needlessly recalculating these divisors every sample */ 462 s32 imu_cal_accel_divisor[3]; 463 s32 imu_cal_gyro_divisor[3]; 464 465 /* power supply data */ 466 struct power_supply *battery; 467 struct power_supply_desc battery_desc; 468 u8 battery_capacity; 469 bool battery_charging; 470 bool host_powered; 471 472 /* rumble */ 473 u8 rumble_data[JC_RUMBLE_QUEUE_SIZE][JC_RUMBLE_DATA_SIZE]; 474 int rumble_queue_head; 475 int rumble_queue_tail; 476 struct workqueue_struct *rumble_queue; 477 struct work_struct rumble_worker; 478 unsigned int rumble_msecs; 479 u16 rumble_ll_freq; 480 u16 rumble_lh_freq; 481 u16 rumble_rl_freq; 482 u16 rumble_rh_freq; 483 unsigned short rumble_zero_countdown; 484 485 /* imu */ 486 struct input_dev *imu_input; 487 bool imu_first_packet_received; /* helps in initiating timestamp */ 488 unsigned int imu_timestamp_us; /* timestamp we report to userspace */ 489 unsigned int imu_last_pkt_ms; /* used to calc imu report delta */ 490 /* the following are used to track the average imu report time delta */ 491 unsigned int imu_delta_samples_count; 492 unsigned int imu_delta_samples_sum; 493 unsigned int imu_avg_delta_ms; 494 }; 495 496 /* Helper macros for checking controller type */ 497 #define jc_type_is_joycon(ctlr) \ 498 (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL || \ 499 ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR || \ 500 ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP) 501 #define jc_type_is_procon(ctlr) \ 502 (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_PROCON) 503 #define jc_type_is_chrggrip(ctlr) \ 504 (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP) 505 506 /* Does this controller have inputs associated with left joycon? */ 507 #define jc_type_has_left(ctlr) \ 508 (ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCL || \ 509 ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO) 510 511 /* Does this controller have inputs associated with right joycon? */ 512 #define jc_type_has_right(ctlr) \ 513 (ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCR || \ 514 ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO) 515 516 static int __joycon_hid_send(struct hid_device *hdev, u8 *data, size_t len) 517 { 518 u8 *buf; 519 int ret; 520 521 buf = kmemdup(data, len, GFP_KERNEL); 522 if (!buf) 523 return -ENOMEM; 524 ret = hid_hw_output_report(hdev, buf, len); 525 kfree(buf); 526 if (ret < 0) 527 hid_dbg(hdev, "Failed to send output report ret=%d\n", ret); 528 return ret; 529 } 530 531 static void joycon_wait_for_input_report(struct joycon_ctlr *ctlr) 532 { 533 int ret; 534 535 /* 536 * If we are in the proper reporting mode, wait for an input 537 * report prior to sending the subcommand. This improves 538 * reliability considerably. 539 */ 540 if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) { 541 unsigned long flags; 542 543 spin_lock_irqsave(&ctlr->lock, flags); 544 ctlr->received_input_report = false; 545 spin_unlock_irqrestore(&ctlr->lock, flags); 546 ret = wait_event_timeout(ctlr->wait, 547 ctlr->received_input_report, 548 HZ / 4); 549 /* We will still proceed, even with a timeout here */ 550 if (!ret) 551 hid_warn(ctlr->hdev, 552 "timeout waiting for input report\n"); 553 } 554 } 555 556 /* 557 * Sending subcommands and/or rumble data at too high a rate can cause bluetooth 558 * controller disconnections. 559 */ 560 #define JC_INPUT_REPORT_MIN_DELTA 8 561 #define JC_INPUT_REPORT_MAX_DELTA 17 562 #define JC_SUBCMD_TX_OFFSET_MS 4 563 #define JC_SUBCMD_VALID_DELTA_REQ 3 564 #define JC_SUBCMD_RATE_MAX_ATTEMPTS 500 565 #define JC_SUBCMD_RATE_LIMITER_USB_MS 20 566 #define JC_SUBCMD_RATE_LIMITER_BT_MS 60 567 #define JC_SUBCMD_RATE_LIMITER_MS(ctlr) ((ctlr)->hdev->bus == BUS_USB ? JC_SUBCMD_RATE_LIMITER_USB_MS : JC_SUBCMD_RATE_LIMITER_BT_MS) 568 static void joycon_enforce_subcmd_rate(struct joycon_ctlr *ctlr) 569 { 570 unsigned int current_ms; 571 unsigned long subcmd_delta; 572 int consecutive_valid_deltas = 0; 573 int attempts = 0; 574 unsigned long flags; 575 576 if (unlikely(ctlr->ctlr_state != JOYCON_CTLR_STATE_READ)) 577 return; 578 579 do { 580 joycon_wait_for_input_report(ctlr); 581 current_ms = jiffies_to_msecs(jiffies); 582 subcmd_delta = current_ms - ctlr->last_subcmd_sent_msecs; 583 584 spin_lock_irqsave(&ctlr->lock, flags); 585 consecutive_valid_deltas = ctlr->consecutive_valid_report_deltas; 586 spin_unlock_irqrestore(&ctlr->lock, flags); 587 588 attempts++; 589 } while ((consecutive_valid_deltas < JC_SUBCMD_VALID_DELTA_REQ || 590 subcmd_delta < JC_SUBCMD_RATE_LIMITER_MS(ctlr)) && 591 ctlr->ctlr_state == JOYCON_CTLR_STATE_READ && 592 attempts < JC_SUBCMD_RATE_MAX_ATTEMPTS); 593 594 if (attempts >= JC_SUBCMD_RATE_MAX_ATTEMPTS) { 595 hid_warn(ctlr->hdev, "%s: exceeded max attempts", __func__); 596 return; 597 } 598 599 ctlr->last_subcmd_sent_msecs = current_ms; 600 601 /* 602 * Wait a short time after receiving an input report before 603 * transmitting. This should reduce odds of a TX coinciding with an RX. 604 * Minimizing concurrent BT traffic with the controller seems to lower 605 * the rate of disconnections. 606 */ 607 msleep(JC_SUBCMD_TX_OFFSET_MS); 608 } 609 610 static int joycon_hid_send_sync(struct joycon_ctlr *ctlr, u8 *data, size_t len, 611 u32 timeout) 612 { 613 int ret; 614 int tries = 2; 615 616 /* 617 * The controller occasionally seems to drop subcommands. In testing, 618 * doing one retry after a timeout appears to always work. 619 */ 620 while (tries--) { 621 joycon_enforce_subcmd_rate(ctlr); 622 623 ret = __joycon_hid_send(ctlr->hdev, data, len); 624 if (ret < 0) { 625 memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE); 626 return ret; 627 } 628 629 ret = wait_event_timeout(ctlr->wait, ctlr->received_resp, 630 timeout); 631 if (!ret) { 632 hid_dbg(ctlr->hdev, 633 "synchronous send/receive timed out\n"); 634 if (tries) { 635 hid_dbg(ctlr->hdev, 636 "retrying sync send after timeout\n"); 637 } 638 memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE); 639 ret = -ETIMEDOUT; 640 } else { 641 ret = 0; 642 break; 643 } 644 } 645 646 ctlr->received_resp = false; 647 return ret; 648 } 649 650 static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd, u32 timeout) 651 { 652 int ret; 653 u8 buf[2] = {JC_OUTPUT_USB_CMD}; 654 655 buf[1] = cmd; 656 ctlr->usb_ack_match = cmd; 657 ctlr->msg_type = JOYCON_MSG_TYPE_USB; 658 ret = joycon_hid_send_sync(ctlr, buf, sizeof(buf), timeout); 659 if (ret) 660 hid_dbg(ctlr->hdev, "send usb command failed; ret=%d\n", ret); 661 return ret; 662 } 663 664 static int joycon_send_subcmd(struct joycon_ctlr *ctlr, 665 struct joycon_subcmd_request *subcmd, 666 size_t data_len, u32 timeout) 667 { 668 int ret; 669 unsigned long flags; 670 671 spin_lock_irqsave(&ctlr->lock, flags); 672 /* 673 * If the controller has been removed, just return ENODEV so the LED 674 * subsystem doesn't print invalid errors on removal. 675 */ 676 if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) { 677 spin_unlock_irqrestore(&ctlr->lock, flags); 678 return -ENODEV; 679 } 680 memcpy(subcmd->rumble_data, ctlr->rumble_data[ctlr->rumble_queue_tail], 681 JC_RUMBLE_DATA_SIZE); 682 spin_unlock_irqrestore(&ctlr->lock, flags); 683 684 subcmd->output_id = JC_OUTPUT_RUMBLE_AND_SUBCMD; 685 subcmd->packet_num = ctlr->subcmd_num; 686 if (++ctlr->subcmd_num > 0xF) 687 ctlr->subcmd_num = 0; 688 ctlr->subcmd_ack_match = subcmd->subcmd_id; 689 ctlr->msg_type = JOYCON_MSG_TYPE_SUBCMD; 690 691 ret = joycon_hid_send_sync(ctlr, (u8 *)subcmd, 692 sizeof(*subcmd) + data_len, timeout); 693 if (ret < 0) 694 hid_dbg(ctlr->hdev, "send subcommand failed; ret=%d\n", ret); 695 else 696 ret = 0; 697 return ret; 698 } 699 700 /* Supply nibbles for flash and on. Ones correspond to active */ 701 static int joycon_set_player_leds(struct joycon_ctlr *ctlr, u8 flash, u8 on) 702 { 703 struct joycon_subcmd_request *req; 704 u8 buffer[sizeof(*req) + 1] = { 0 }; 705 706 req = (struct joycon_subcmd_request *)buffer; 707 req->subcmd_id = JC_SUBCMD_SET_PLAYER_LIGHTS; 708 req->data[0] = (flash << 4) | on; 709 710 hid_dbg(ctlr->hdev, "setting player leds\n"); 711 return joycon_send_subcmd(ctlr, req, 1, HZ/4); 712 } 713 714 static int joycon_set_home_led(struct joycon_ctlr *ctlr, enum led_brightness brightness) 715 { 716 struct joycon_subcmd_request *req; 717 u8 buffer[sizeof(*req) + 5] = { 0 }; 718 u8 *data; 719 720 req = (struct joycon_subcmd_request *)buffer; 721 req->subcmd_id = JC_SUBCMD_SET_HOME_LIGHT; 722 data = req->data; 723 data[0] = 0x01; 724 data[1] = brightness << 4; 725 data[2] = brightness | (brightness << 4); 726 data[3] = 0x11; 727 data[4] = 0x11; 728 729 hid_dbg(ctlr->hdev, "setting home led brightness\n"); 730 return joycon_send_subcmd(ctlr, req, 5, HZ/4); 731 } 732 733 static int joycon_request_spi_flash_read(struct joycon_ctlr *ctlr, 734 u32 start_addr, u8 size, u8 **reply) 735 { 736 struct joycon_subcmd_request *req; 737 struct joycon_input_report *report; 738 u8 buffer[sizeof(*req) + 5] = { 0 }; 739 u8 *data; 740 int ret; 741 742 if (!reply) 743 return -EINVAL; 744 745 req = (struct joycon_subcmd_request *)buffer; 746 req->subcmd_id = JC_SUBCMD_SPI_FLASH_READ; 747 data = req->data; 748 put_unaligned_le32(start_addr, data); 749 data[4] = size; 750 751 hid_dbg(ctlr->hdev, "requesting SPI flash data\n"); 752 ret = joycon_send_subcmd(ctlr, req, 5, HZ); 753 if (ret) { 754 hid_err(ctlr->hdev, "failed reading SPI flash; ret=%d\n", ret); 755 } else { 756 report = (struct joycon_input_report *)ctlr->input_buf; 757 /* The read data starts at the 6th byte */ 758 *reply = &report->subcmd_reply.data[5]; 759 } 760 return ret; 761 } 762 763 /* 764 * User calibration's presence is denoted with a magic byte preceding it. 765 * returns 0 if magic val is present, 1 if not present, < 0 on error 766 */ 767 static int joycon_check_for_cal_magic(struct joycon_ctlr *ctlr, u32 flash_addr) 768 { 769 int ret; 770 u8 *reply; 771 772 ret = joycon_request_spi_flash_read(ctlr, flash_addr, 773 JC_CAL_USR_MAGIC_SIZE, &reply); 774 if (ret) 775 return ret; 776 777 return reply[0] != JC_CAL_USR_MAGIC_0 || reply[1] != JC_CAL_USR_MAGIC_1; 778 } 779 780 static int joycon_read_stick_calibration(struct joycon_ctlr *ctlr, u16 cal_addr, 781 struct joycon_stick_cal *cal_x, 782 struct joycon_stick_cal *cal_y, 783 bool left_stick) 784 { 785 s32 x_max_above; 786 s32 x_min_below; 787 s32 y_max_above; 788 s32 y_min_below; 789 u8 *raw_cal; 790 int ret; 791 792 ret = joycon_request_spi_flash_read(ctlr, cal_addr, 793 JC_CAL_STICK_DATA_SIZE, &raw_cal); 794 if (ret) 795 return ret; 796 797 /* stick calibration parsing: note the order differs based on stick */ 798 if (left_stick) { 799 x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0, 800 12); 801 y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4, 802 12); 803 cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0, 804 12); 805 cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4, 806 12); 807 x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0, 808 12); 809 y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4, 810 12); 811 } else { 812 cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0, 813 12); 814 cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4, 815 12); 816 x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0, 817 12); 818 y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4, 819 12); 820 x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0, 821 12); 822 y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4, 823 12); 824 } 825 826 cal_x->max = cal_x->center + x_max_above; 827 cal_x->min = cal_x->center - x_min_below; 828 cal_y->max = cal_y->center + y_max_above; 829 cal_y->min = cal_y->center - y_min_below; 830 831 /* check if calibration values are plausible */ 832 if (cal_x->min >= cal_x->center || cal_x->center >= cal_x->max || 833 cal_y->min >= cal_y->center || cal_y->center >= cal_y->max) 834 ret = -EINVAL; 835 836 return ret; 837 } 838 839 static const u16 DFLT_STICK_CAL_CEN = 2000; 840 static const u16 DFLT_STICK_CAL_MAX = 3500; 841 static const u16 DFLT_STICK_CAL_MIN = 500; 842 static void joycon_use_default_calibration(struct hid_device *hdev, 843 struct joycon_stick_cal *cal_x, 844 struct joycon_stick_cal *cal_y, 845 const char *stick, int ret) 846 { 847 hid_warn(hdev, 848 "Failed to read %s stick cal, using defaults; e=%d\n", 849 stick, ret); 850 851 cal_x->center = cal_y->center = DFLT_STICK_CAL_CEN; 852 cal_x->max = cal_y->max = DFLT_STICK_CAL_MAX; 853 cal_x->min = cal_y->min = DFLT_STICK_CAL_MIN; 854 } 855 856 static int joycon_request_calibration(struct joycon_ctlr *ctlr) 857 { 858 u16 left_stick_addr = JC_CAL_FCT_DATA_LEFT_ADDR; 859 u16 right_stick_addr = JC_CAL_FCT_DATA_RIGHT_ADDR; 860 int ret; 861 862 hid_dbg(ctlr->hdev, "requesting cal data\n"); 863 864 /* check if user stick calibrations are present */ 865 if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_LEFT_MAGIC_ADDR)) { 866 left_stick_addr = JC_CAL_USR_LEFT_DATA_ADDR; 867 hid_info(ctlr->hdev, "using user cal for left stick\n"); 868 } else { 869 hid_info(ctlr->hdev, "using factory cal for left stick\n"); 870 } 871 if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_RIGHT_MAGIC_ADDR)) { 872 right_stick_addr = JC_CAL_USR_RIGHT_DATA_ADDR; 873 hid_info(ctlr->hdev, "using user cal for right stick\n"); 874 } else { 875 hid_info(ctlr->hdev, "using factory cal for right stick\n"); 876 } 877 878 /* read the left stick calibration data */ 879 ret = joycon_read_stick_calibration(ctlr, left_stick_addr, 880 &ctlr->left_stick_cal_x, 881 &ctlr->left_stick_cal_y, 882 true); 883 884 if (ret) 885 joycon_use_default_calibration(ctlr->hdev, 886 &ctlr->left_stick_cal_x, 887 &ctlr->left_stick_cal_y, 888 "left", ret); 889 890 /* read the right stick calibration data */ 891 ret = joycon_read_stick_calibration(ctlr, right_stick_addr, 892 &ctlr->right_stick_cal_x, 893 &ctlr->right_stick_cal_y, 894 false); 895 896 if (ret) 897 joycon_use_default_calibration(ctlr->hdev, 898 &ctlr->right_stick_cal_x, 899 &ctlr->right_stick_cal_y, 900 "right", ret); 901 902 hid_dbg(ctlr->hdev, "calibration:\n" 903 "l_x_c=%d l_x_max=%d l_x_min=%d\n" 904 "l_y_c=%d l_y_max=%d l_y_min=%d\n" 905 "r_x_c=%d r_x_max=%d r_x_min=%d\n" 906 "r_y_c=%d r_y_max=%d r_y_min=%d\n", 907 ctlr->left_stick_cal_x.center, 908 ctlr->left_stick_cal_x.max, 909 ctlr->left_stick_cal_x.min, 910 ctlr->left_stick_cal_y.center, 911 ctlr->left_stick_cal_y.max, 912 ctlr->left_stick_cal_y.min, 913 ctlr->right_stick_cal_x.center, 914 ctlr->right_stick_cal_x.max, 915 ctlr->right_stick_cal_x.min, 916 ctlr->right_stick_cal_y.center, 917 ctlr->right_stick_cal_y.max, 918 ctlr->right_stick_cal_y.min); 919 920 return 0; 921 } 922 923 /* 924 * These divisors are calculated once rather than for each sample. They are only 925 * dependent on the IMU calibration values. They are used when processing the 926 * IMU input reports. 927 */ 928 static void joycon_calc_imu_cal_divisors(struct joycon_ctlr *ctlr) 929 { 930 int i; 931 932 for (i = 0; i < 3; i++) { 933 ctlr->imu_cal_accel_divisor[i] = ctlr->accel_cal.scale[i] - 934 ctlr->accel_cal.offset[i]; 935 ctlr->imu_cal_gyro_divisor[i] = ctlr->gyro_cal.scale[i] - 936 ctlr->gyro_cal.offset[i]; 937 } 938 } 939 940 static const s16 DFLT_ACCEL_OFFSET /*= 0*/; 941 static const s16 DFLT_ACCEL_SCALE = 16384; 942 static const s16 DFLT_GYRO_OFFSET /*= 0*/; 943 static const s16 DFLT_GYRO_SCALE = 13371; 944 static int joycon_request_imu_calibration(struct joycon_ctlr *ctlr) 945 { 946 u16 imu_cal_addr = JC_IMU_CAL_FCT_DATA_ADDR; 947 u8 *raw_cal; 948 int ret; 949 int i; 950 951 /* check if user calibration exists */ 952 if (!joycon_check_for_cal_magic(ctlr, JC_IMU_CAL_USR_MAGIC_ADDR)) { 953 imu_cal_addr = JC_IMU_CAL_USR_DATA_ADDR; 954 hid_info(ctlr->hdev, "using user cal for IMU\n"); 955 } else { 956 hid_info(ctlr->hdev, "using factory cal for IMU\n"); 957 } 958 959 /* request IMU calibration data */ 960 hid_dbg(ctlr->hdev, "requesting IMU cal data\n"); 961 ret = joycon_request_spi_flash_read(ctlr, imu_cal_addr, 962 JC_IMU_CAL_DATA_SIZE, &raw_cal); 963 if (ret) { 964 hid_warn(ctlr->hdev, 965 "Failed to read IMU cal, using defaults; ret=%d\n", 966 ret); 967 968 for (i = 0; i < 3; i++) { 969 ctlr->accel_cal.offset[i] = DFLT_ACCEL_OFFSET; 970 ctlr->accel_cal.scale[i] = DFLT_ACCEL_SCALE; 971 ctlr->gyro_cal.offset[i] = DFLT_GYRO_OFFSET; 972 ctlr->gyro_cal.scale[i] = DFLT_GYRO_SCALE; 973 } 974 joycon_calc_imu_cal_divisors(ctlr); 975 return ret; 976 } 977 978 /* IMU calibration parsing */ 979 for (i = 0; i < 3; i++) { 980 int j = i * 2; 981 982 ctlr->accel_cal.offset[i] = get_unaligned_le16(raw_cal + j); 983 ctlr->accel_cal.scale[i] = get_unaligned_le16(raw_cal + j + 6); 984 ctlr->gyro_cal.offset[i] = get_unaligned_le16(raw_cal + j + 12); 985 ctlr->gyro_cal.scale[i] = get_unaligned_le16(raw_cal + j + 18); 986 } 987 988 joycon_calc_imu_cal_divisors(ctlr); 989 990 hid_dbg(ctlr->hdev, "IMU calibration:\n" 991 "a_o[0]=%d a_o[1]=%d a_o[2]=%d\n" 992 "a_s[0]=%d a_s[1]=%d a_s[2]=%d\n" 993 "g_o[0]=%d g_o[1]=%d g_o[2]=%d\n" 994 "g_s[0]=%d g_s[1]=%d g_s[2]=%d\n", 995 ctlr->accel_cal.offset[0], 996 ctlr->accel_cal.offset[1], 997 ctlr->accel_cal.offset[2], 998 ctlr->accel_cal.scale[0], 999 ctlr->accel_cal.scale[1], 1000 ctlr->accel_cal.scale[2], 1001 ctlr->gyro_cal.offset[0], 1002 ctlr->gyro_cal.offset[1], 1003 ctlr->gyro_cal.offset[2], 1004 ctlr->gyro_cal.scale[0], 1005 ctlr->gyro_cal.scale[1], 1006 ctlr->gyro_cal.scale[2]); 1007 1008 return 0; 1009 } 1010 1011 static int joycon_set_report_mode(struct joycon_ctlr *ctlr) 1012 { 1013 struct joycon_subcmd_request *req; 1014 u8 buffer[sizeof(*req) + 1] = { 0 }; 1015 1016 req = (struct joycon_subcmd_request *)buffer; 1017 req->subcmd_id = JC_SUBCMD_SET_REPORT_MODE; 1018 req->data[0] = 0x30; /* standard, full report mode */ 1019 1020 hid_dbg(ctlr->hdev, "setting controller report mode\n"); 1021 return joycon_send_subcmd(ctlr, req, 1, HZ); 1022 } 1023 1024 static int joycon_enable_rumble(struct joycon_ctlr *ctlr) 1025 { 1026 struct joycon_subcmd_request *req; 1027 u8 buffer[sizeof(*req) + 1] = { 0 }; 1028 1029 req = (struct joycon_subcmd_request *)buffer; 1030 req->subcmd_id = JC_SUBCMD_ENABLE_VIBRATION; 1031 req->data[0] = 0x01; /* note: 0x00 would disable */ 1032 1033 hid_dbg(ctlr->hdev, "enabling rumble\n"); 1034 return joycon_send_subcmd(ctlr, req, 1, HZ/4); 1035 } 1036 1037 static int joycon_enable_imu(struct joycon_ctlr *ctlr) 1038 { 1039 struct joycon_subcmd_request *req; 1040 u8 buffer[sizeof(*req) + 1] = { 0 }; 1041 1042 req = (struct joycon_subcmd_request *)buffer; 1043 req->subcmd_id = JC_SUBCMD_ENABLE_IMU; 1044 req->data[0] = 0x01; /* note: 0x00 would disable */ 1045 1046 hid_dbg(ctlr->hdev, "enabling IMU\n"); 1047 return joycon_send_subcmd(ctlr, req, 1, HZ); 1048 } 1049 1050 static s32 joycon_map_stick_val(struct joycon_stick_cal *cal, s32 val) 1051 { 1052 s32 center = cal->center; 1053 s32 min = cal->min; 1054 s32 max = cal->max; 1055 s32 new_val; 1056 1057 if (val > center) { 1058 new_val = (val - center) * JC_MAX_STICK_MAG; 1059 new_val /= (max - center); 1060 } else { 1061 new_val = (center - val) * -JC_MAX_STICK_MAG; 1062 new_val /= (center - min); 1063 } 1064 new_val = clamp(new_val, (s32)-JC_MAX_STICK_MAG, (s32)JC_MAX_STICK_MAG); 1065 return new_val; 1066 } 1067 1068 static void joycon_input_report_parse_imu_data(struct joycon_ctlr *ctlr, 1069 struct joycon_input_report *rep, 1070 struct joycon_imu_data *imu_data) 1071 { 1072 u8 *raw = rep->imu_raw_bytes; 1073 int i; 1074 1075 for (i = 0; i < 3; i++) { 1076 struct joycon_imu_data *data = &imu_data[i]; 1077 1078 data->accel_x = get_unaligned_le16(raw + 0); 1079 data->accel_y = get_unaligned_le16(raw + 2); 1080 data->accel_z = get_unaligned_le16(raw + 4); 1081 data->gyro_x = get_unaligned_le16(raw + 6); 1082 data->gyro_y = get_unaligned_le16(raw + 8); 1083 data->gyro_z = get_unaligned_le16(raw + 10); 1084 /* point to next imu sample */ 1085 raw += sizeof(struct joycon_imu_data); 1086 } 1087 } 1088 1089 static void joycon_parse_imu_report(struct joycon_ctlr *ctlr, 1090 struct joycon_input_report *rep) 1091 { 1092 struct joycon_imu_data imu_data[3] = {0}; /* 3 reports per packet */ 1093 struct input_dev *idev = ctlr->imu_input; 1094 unsigned int msecs = jiffies_to_msecs(jiffies); 1095 unsigned int last_msecs = ctlr->imu_last_pkt_ms; 1096 int i; 1097 int value[6]; 1098 1099 joycon_input_report_parse_imu_data(ctlr, rep, imu_data); 1100 1101 /* 1102 * There are complexities surrounding how we determine the timestamps we 1103 * associate with the samples we pass to userspace. The IMU input 1104 * reports do not provide us with a good timestamp. There's a quickly 1105 * incrementing 8-bit counter per input report, but it is not very 1106 * useful for this purpose (it is not entirely clear what rate it 1107 * increments at or if it varies based on packet push rate - more on 1108 * the push rate below...). 1109 * 1110 * The reverse engineering work done on the joy-cons and pro controllers 1111 * by the community seems to indicate the following: 1112 * - The controller samples the IMU every 1.35ms. It then does some of 1113 * its own processing, probably averaging the samples out. 1114 * - Each imu input report contains 3 IMU samples, (usually 5ms apart). 1115 * - In the standard reporting mode (which this driver uses exclusively) 1116 * input reports are pushed from the controller as follows: 1117 * * joy-con (bluetooth): every 15 ms 1118 * * joy-cons (in charging grip via USB): every 15 ms 1119 * * pro controller (USB): every 15 ms 1120 * * pro controller (bluetooth): every 8 ms (this is the wildcard) 1121 * 1122 * Further complicating matters is that some bluetooth stacks are known 1123 * to alter the controller's packet rate by hardcoding the bluetooth 1124 * SSR for the switch controllers (android's stack currently sets the 1125 * SSR to 11ms for both the joy-cons and pro controllers). 1126 * 1127 * In my own testing, I've discovered that my pro controller either 1128 * reports IMU sample batches every 11ms or every 15ms. This rate is 1129 * stable after connecting. It isn't 100% clear what determines this 1130 * rate. Importantly, even when sending every 11ms, none of the samples 1131 * are duplicates. This seems to indicate that the time deltas between 1132 * reported samples can vary based on the input report rate. 1133 * 1134 * The solution employed in this driver is to keep track of the average 1135 * time delta between IMU input reports. In testing, this value has 1136 * proven to be stable, staying at 15ms or 11ms, though other hardware 1137 * configurations and bluetooth stacks could potentially see other rates 1138 * (hopefully this will become more clear as more people use the 1139 * driver). 1140 * 1141 * Keeping track of the average report delta allows us to submit our 1142 * timestamps to userspace based on that. Each report contains 3 1143 * samples, so the IMU sampling rate should be avg_time_delta/3. We can 1144 * also use this average to detect events where we have dropped a 1145 * packet. The userspace timestamp for the samples will be adjusted 1146 * accordingly to prevent unwanted behvaior. 1147 */ 1148 if (!ctlr->imu_first_packet_received) { 1149 ctlr->imu_timestamp_us = 0; 1150 ctlr->imu_delta_samples_count = 0; 1151 ctlr->imu_delta_samples_sum = 0; 1152 ctlr->imu_avg_delta_ms = JC_IMU_DFLT_AVG_DELTA_MS; 1153 ctlr->imu_first_packet_received = true; 1154 } else { 1155 unsigned int delta = msecs - last_msecs; 1156 unsigned int dropped_pkts; 1157 unsigned int dropped_threshold; 1158 1159 /* avg imu report delta housekeeping */ 1160 ctlr->imu_delta_samples_sum += delta; 1161 ctlr->imu_delta_samples_count++; 1162 if (ctlr->imu_delta_samples_count >= 1163 JC_IMU_SAMPLES_PER_DELTA_AVG) { 1164 ctlr->imu_avg_delta_ms = ctlr->imu_delta_samples_sum / 1165 ctlr->imu_delta_samples_count; 1166 /* don't ever want divide by zero shenanigans */ 1167 if (ctlr->imu_avg_delta_ms == 0) { 1168 ctlr->imu_avg_delta_ms = 1; 1169 hid_warn(ctlr->hdev, 1170 "calculated avg imu delta of 0\n"); 1171 } 1172 ctlr->imu_delta_samples_count = 0; 1173 ctlr->imu_delta_samples_sum = 0; 1174 } 1175 1176 /* useful for debugging IMU sample rate */ 1177 hid_dbg(ctlr->hdev, 1178 "imu_report: ms=%u last_ms=%u delta=%u avg_delta=%u\n", 1179 msecs, last_msecs, delta, ctlr->imu_avg_delta_ms); 1180 1181 /* check if any packets have been dropped */ 1182 dropped_threshold = ctlr->imu_avg_delta_ms * 3 / 2; 1183 dropped_pkts = (delta - min(delta, dropped_threshold)) / 1184 ctlr->imu_avg_delta_ms; 1185 ctlr->imu_timestamp_us += 1000 * ctlr->imu_avg_delta_ms; 1186 if (dropped_pkts > JC_IMU_DROPPED_PKT_WARNING) { 1187 hid_warn(ctlr->hdev, 1188 "compensating for %u dropped IMU reports\n", 1189 dropped_pkts); 1190 hid_warn(ctlr->hdev, 1191 "delta=%u avg_delta=%u\n", 1192 delta, ctlr->imu_avg_delta_ms); 1193 } 1194 } 1195 ctlr->imu_last_pkt_ms = msecs; 1196 1197 /* Each IMU input report contains three samples */ 1198 for (i = 0; i < 3; i++) { 1199 input_event(idev, EV_MSC, MSC_TIMESTAMP, 1200 ctlr->imu_timestamp_us); 1201 1202 /* 1203 * These calculations (which use the controller's calibration 1204 * settings to improve the final values) are based on those 1205 * found in the community's reverse-engineering repo (linked at 1206 * top of driver). For hid-nintendo, we make sure that the final 1207 * value given to userspace is always in terms of the axis 1208 * resolution we provided. 1209 * 1210 * Currently only the gyro calculations subtract the calibration 1211 * offsets from the raw value itself. In testing, doing the same 1212 * for the accelerometer raw values decreased accuracy. 1213 * 1214 * Note that the gyro values are multiplied by the 1215 * precision-saving scaling factor to prevent large inaccuracies 1216 * due to truncation of the resolution value which would 1217 * otherwise occur. To prevent overflow (without resorting to 64 1218 * bit integer math), the mult_frac macro is used. 1219 */ 1220 value[0] = mult_frac((JC_IMU_PREC_RANGE_SCALE * 1221 (imu_data[i].gyro_x - 1222 ctlr->gyro_cal.offset[0])), 1223 ctlr->gyro_cal.scale[0], 1224 ctlr->imu_cal_gyro_divisor[0]); 1225 value[1] = mult_frac((JC_IMU_PREC_RANGE_SCALE * 1226 (imu_data[i].gyro_y - 1227 ctlr->gyro_cal.offset[1])), 1228 ctlr->gyro_cal.scale[1], 1229 ctlr->imu_cal_gyro_divisor[1]); 1230 value[2] = mult_frac((JC_IMU_PREC_RANGE_SCALE * 1231 (imu_data[i].gyro_z - 1232 ctlr->gyro_cal.offset[2])), 1233 ctlr->gyro_cal.scale[2], 1234 ctlr->imu_cal_gyro_divisor[2]); 1235 1236 value[3] = ((s32)imu_data[i].accel_x * 1237 ctlr->accel_cal.scale[0]) / 1238 ctlr->imu_cal_accel_divisor[0]; 1239 value[4] = ((s32)imu_data[i].accel_y * 1240 ctlr->accel_cal.scale[1]) / 1241 ctlr->imu_cal_accel_divisor[1]; 1242 value[5] = ((s32)imu_data[i].accel_z * 1243 ctlr->accel_cal.scale[2]) / 1244 ctlr->imu_cal_accel_divisor[2]; 1245 1246 hid_dbg(ctlr->hdev, "raw_gyro: g_x=%d g_y=%d g_z=%d\n", 1247 imu_data[i].gyro_x, imu_data[i].gyro_y, 1248 imu_data[i].gyro_z); 1249 hid_dbg(ctlr->hdev, "raw_accel: a_x=%d a_y=%d a_z=%d\n", 1250 imu_data[i].accel_x, imu_data[i].accel_y, 1251 imu_data[i].accel_z); 1252 1253 /* 1254 * The right joy-con has 2 axes negated, Y and Z. This is due to 1255 * the orientation of the IMU in the controller. We negate those 1256 * axes' values in order to be consistent with the left joy-con 1257 * and the pro controller: 1258 * X: positive is pointing toward the triggers 1259 * Y: positive is pointing to the left 1260 * Z: positive is pointing up (out of the buttons/sticks) 1261 * The axes follow the right-hand rule. 1262 */ 1263 if (jc_type_is_joycon(ctlr) && jc_type_has_right(ctlr)) { 1264 int j; 1265 1266 /* negate all but x axis */ 1267 for (j = 1; j < 6; ++j) { 1268 if (j == 3) 1269 continue; 1270 value[j] *= -1; 1271 } 1272 } 1273 1274 input_report_abs(idev, ABS_RX, value[0]); 1275 input_report_abs(idev, ABS_RY, value[1]); 1276 input_report_abs(idev, ABS_RZ, value[2]); 1277 input_report_abs(idev, ABS_X, value[3]); 1278 input_report_abs(idev, ABS_Y, value[4]); 1279 input_report_abs(idev, ABS_Z, value[5]); 1280 input_sync(idev); 1281 /* convert to micros and divide by 3 (3 samples per report). */ 1282 ctlr->imu_timestamp_us += ctlr->imu_avg_delta_ms * 1000 / 3; 1283 } 1284 } 1285 1286 static void joycon_parse_report(struct joycon_ctlr *ctlr, 1287 struct joycon_input_report *rep) 1288 { 1289 struct input_dev *dev = ctlr->input; 1290 unsigned long flags; 1291 u8 tmp; 1292 u32 btns; 1293 unsigned long msecs = jiffies_to_msecs(jiffies); 1294 unsigned long report_delta_ms = msecs - ctlr->last_input_report_msecs; 1295 1296 spin_lock_irqsave(&ctlr->lock, flags); 1297 if (IS_ENABLED(CONFIG_NINTENDO_FF) && rep->vibrator_report && 1298 ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED && 1299 (msecs - ctlr->rumble_msecs) >= JC_RUMBLE_PERIOD_MS && 1300 (ctlr->rumble_queue_head != ctlr->rumble_queue_tail || 1301 ctlr->rumble_zero_countdown > 0)) { 1302 /* 1303 * When this value reaches 0, we know we've sent multiple 1304 * packets to the controller instructing it to disable rumble. 1305 * We can safely stop sending periodic rumble packets until the 1306 * next ff effect. 1307 */ 1308 if (ctlr->rumble_zero_countdown > 0) 1309 ctlr->rumble_zero_countdown--; 1310 queue_work(ctlr->rumble_queue, &ctlr->rumble_worker); 1311 } 1312 1313 /* Parse the battery status */ 1314 tmp = rep->bat_con; 1315 ctlr->host_powered = tmp & BIT(0); 1316 ctlr->battery_charging = tmp & BIT(4); 1317 tmp = tmp >> 5; 1318 switch (tmp) { 1319 case 0: /* empty */ 1320 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; 1321 break; 1322 case 1: /* low */ 1323 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_LOW; 1324 break; 1325 case 2: /* medium */ 1326 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; 1327 break; 1328 case 3: /* high */ 1329 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_HIGH; 1330 break; 1331 case 4: /* full */ 1332 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_FULL; 1333 break; 1334 default: 1335 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; 1336 hid_warn(ctlr->hdev, "Invalid battery status\n"); 1337 break; 1338 } 1339 spin_unlock_irqrestore(&ctlr->lock, flags); 1340 1341 /* Parse the buttons and sticks */ 1342 btns = hid_field_extract(ctlr->hdev, rep->button_status, 0, 24); 1343 1344 if (jc_type_has_left(ctlr)) { 1345 u16 raw_x; 1346 u16 raw_y; 1347 s32 x; 1348 s32 y; 1349 1350 /* get raw stick values */ 1351 raw_x = hid_field_extract(ctlr->hdev, rep->left_stick, 0, 12); 1352 raw_y = hid_field_extract(ctlr->hdev, 1353 rep->left_stick + 1, 4, 12); 1354 /* map the stick values */ 1355 x = joycon_map_stick_val(&ctlr->left_stick_cal_x, raw_x); 1356 y = -joycon_map_stick_val(&ctlr->left_stick_cal_y, raw_y); 1357 /* report sticks */ 1358 input_report_abs(dev, ABS_X, x); 1359 input_report_abs(dev, ABS_Y, y); 1360 1361 /* report buttons */ 1362 input_report_key(dev, BTN_TL, btns & JC_BTN_L); 1363 input_report_key(dev, BTN_TL2, btns & JC_BTN_ZL); 1364 input_report_key(dev, BTN_SELECT, btns & JC_BTN_MINUS); 1365 input_report_key(dev, BTN_THUMBL, btns & JC_BTN_LSTICK); 1366 input_report_key(dev, BTN_Z, btns & JC_BTN_CAP); 1367 1368 if (jc_type_is_joycon(ctlr)) { 1369 /* Report the S buttons as the non-existent triggers */ 1370 input_report_key(dev, BTN_TR, btns & JC_BTN_SL_L); 1371 input_report_key(dev, BTN_TR2, btns & JC_BTN_SR_L); 1372 1373 /* Report d-pad as digital buttons for the joy-cons */ 1374 input_report_key(dev, BTN_DPAD_DOWN, 1375 btns & JC_BTN_DOWN); 1376 input_report_key(dev, BTN_DPAD_UP, btns & JC_BTN_UP); 1377 input_report_key(dev, BTN_DPAD_RIGHT, 1378 btns & JC_BTN_RIGHT); 1379 input_report_key(dev, BTN_DPAD_LEFT, 1380 btns & JC_BTN_LEFT); 1381 } else { 1382 int hatx = 0; 1383 int haty = 0; 1384 1385 /* d-pad x */ 1386 if (btns & JC_BTN_LEFT) 1387 hatx = -1; 1388 else if (btns & JC_BTN_RIGHT) 1389 hatx = 1; 1390 input_report_abs(dev, ABS_HAT0X, hatx); 1391 1392 /* d-pad y */ 1393 if (btns & JC_BTN_UP) 1394 haty = -1; 1395 else if (btns & JC_BTN_DOWN) 1396 haty = 1; 1397 input_report_abs(dev, ABS_HAT0Y, haty); 1398 } 1399 } 1400 if (jc_type_has_right(ctlr)) { 1401 u16 raw_x; 1402 u16 raw_y; 1403 s32 x; 1404 s32 y; 1405 1406 /* get raw stick values */ 1407 raw_x = hid_field_extract(ctlr->hdev, rep->right_stick, 0, 12); 1408 raw_y = hid_field_extract(ctlr->hdev, 1409 rep->right_stick + 1, 4, 12); 1410 /* map stick values */ 1411 x = joycon_map_stick_val(&ctlr->right_stick_cal_x, raw_x); 1412 y = -joycon_map_stick_val(&ctlr->right_stick_cal_y, raw_y); 1413 /* report sticks */ 1414 input_report_abs(dev, ABS_RX, x); 1415 input_report_abs(dev, ABS_RY, y); 1416 1417 /* report buttons */ 1418 input_report_key(dev, BTN_TR, btns & JC_BTN_R); 1419 input_report_key(dev, BTN_TR2, btns & JC_BTN_ZR); 1420 if (jc_type_is_joycon(ctlr)) { 1421 /* Report the S buttons as the non-existent triggers */ 1422 input_report_key(dev, BTN_TL, btns & JC_BTN_SL_R); 1423 input_report_key(dev, BTN_TL2, btns & JC_BTN_SR_R); 1424 } 1425 input_report_key(dev, BTN_START, btns & JC_BTN_PLUS); 1426 input_report_key(dev, BTN_THUMBR, btns & JC_BTN_RSTICK); 1427 input_report_key(dev, BTN_MODE, btns & JC_BTN_HOME); 1428 input_report_key(dev, BTN_WEST, btns & JC_BTN_Y); 1429 input_report_key(dev, BTN_NORTH, btns & JC_BTN_X); 1430 input_report_key(dev, BTN_EAST, btns & JC_BTN_A); 1431 input_report_key(dev, BTN_SOUTH, btns & JC_BTN_B); 1432 } 1433 1434 input_sync(dev); 1435 1436 spin_lock_irqsave(&ctlr->lock, flags); 1437 ctlr->last_input_report_msecs = msecs; 1438 /* 1439 * Was this input report a reasonable time delta compared to the prior 1440 * report? We use this information to decide when a safe time is to send 1441 * rumble packets or subcommand packets. 1442 */ 1443 if (report_delta_ms >= JC_INPUT_REPORT_MIN_DELTA && 1444 report_delta_ms <= JC_INPUT_REPORT_MAX_DELTA) { 1445 if (ctlr->consecutive_valid_report_deltas < JC_SUBCMD_VALID_DELTA_REQ) 1446 ctlr->consecutive_valid_report_deltas++; 1447 } else { 1448 ctlr->consecutive_valid_report_deltas = 0; 1449 } 1450 /* 1451 * Our consecutive valid report tracking is only relevant for 1452 * bluetooth-connected controllers. For USB devices, we're beholden to 1453 * USB's underlying polling rate anyway. Always set to the consecutive 1454 * delta requirement. 1455 */ 1456 if (ctlr->hdev->bus == BUS_USB) 1457 ctlr->consecutive_valid_report_deltas = JC_SUBCMD_VALID_DELTA_REQ; 1458 1459 spin_unlock_irqrestore(&ctlr->lock, flags); 1460 1461 /* 1462 * Immediately after receiving a report is the most reliable time to 1463 * send a subcommand to the controller. Wake any subcommand senders 1464 * waiting for a report. 1465 */ 1466 if (unlikely(mutex_is_locked(&ctlr->output_mutex))) { 1467 spin_lock_irqsave(&ctlr->lock, flags); 1468 ctlr->received_input_report = true; 1469 spin_unlock_irqrestore(&ctlr->lock, flags); 1470 wake_up(&ctlr->wait); 1471 } 1472 1473 /* parse IMU data if present */ 1474 if (rep->id == JC_INPUT_IMU_DATA) 1475 joycon_parse_imu_report(ctlr, rep); 1476 } 1477 1478 static int joycon_send_rumble_data(struct joycon_ctlr *ctlr) 1479 { 1480 int ret; 1481 unsigned long flags; 1482 struct joycon_rumble_output rumble_output = { 0 }; 1483 1484 spin_lock_irqsave(&ctlr->lock, flags); 1485 /* 1486 * If the controller has been removed, just return ENODEV so the LED 1487 * subsystem doesn't print invalid errors on removal. 1488 */ 1489 if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) { 1490 spin_unlock_irqrestore(&ctlr->lock, flags); 1491 return -ENODEV; 1492 } 1493 memcpy(rumble_output.rumble_data, 1494 ctlr->rumble_data[ctlr->rumble_queue_tail], 1495 JC_RUMBLE_DATA_SIZE); 1496 spin_unlock_irqrestore(&ctlr->lock, flags); 1497 1498 rumble_output.output_id = JC_OUTPUT_RUMBLE_ONLY; 1499 rumble_output.packet_num = ctlr->subcmd_num; 1500 if (++ctlr->subcmd_num > 0xF) 1501 ctlr->subcmd_num = 0; 1502 1503 joycon_enforce_subcmd_rate(ctlr); 1504 1505 ret = __joycon_hid_send(ctlr->hdev, (u8 *)&rumble_output, 1506 sizeof(rumble_output)); 1507 return ret; 1508 } 1509 1510 static void joycon_rumble_worker(struct work_struct *work) 1511 { 1512 struct joycon_ctlr *ctlr = container_of(work, struct joycon_ctlr, 1513 rumble_worker); 1514 unsigned long flags; 1515 bool again = true; 1516 int ret; 1517 1518 while (again) { 1519 mutex_lock(&ctlr->output_mutex); 1520 ret = joycon_send_rumble_data(ctlr); 1521 mutex_unlock(&ctlr->output_mutex); 1522 1523 /* -ENODEV means the controller was just unplugged */ 1524 spin_lock_irqsave(&ctlr->lock, flags); 1525 if (ret < 0 && ret != -ENODEV && 1526 ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED) 1527 hid_warn(ctlr->hdev, "Failed to set rumble; e=%d", ret); 1528 1529 ctlr->rumble_msecs = jiffies_to_msecs(jiffies); 1530 if (ctlr->rumble_queue_tail != ctlr->rumble_queue_head) { 1531 if (++ctlr->rumble_queue_tail >= JC_RUMBLE_QUEUE_SIZE) 1532 ctlr->rumble_queue_tail = 0; 1533 } else { 1534 again = false; 1535 } 1536 spin_unlock_irqrestore(&ctlr->lock, flags); 1537 } 1538 } 1539 1540 #if IS_ENABLED(CONFIG_NINTENDO_FF) 1541 static struct joycon_rumble_freq_data joycon_find_rumble_freq(u16 freq) 1542 { 1543 const size_t length = ARRAY_SIZE(joycon_rumble_frequencies); 1544 const struct joycon_rumble_freq_data *data = joycon_rumble_frequencies; 1545 int i = 0; 1546 1547 if (freq > data[0].freq) { 1548 for (i = 1; i < length - 1; i++) { 1549 if (freq > data[i - 1].freq && freq <= data[i].freq) 1550 break; 1551 } 1552 } 1553 1554 return data[i]; 1555 } 1556 1557 static struct joycon_rumble_amp_data joycon_find_rumble_amp(u16 amp) 1558 { 1559 const size_t length = ARRAY_SIZE(joycon_rumble_amplitudes); 1560 const struct joycon_rumble_amp_data *data = joycon_rumble_amplitudes; 1561 int i = 0; 1562 1563 if (amp > data[0].amp) { 1564 for (i = 1; i < length - 1; i++) { 1565 if (amp > data[i - 1].amp && amp <= data[i].amp) 1566 break; 1567 } 1568 } 1569 1570 return data[i]; 1571 } 1572 1573 static void joycon_encode_rumble(u8 *data, u16 freq_low, u16 freq_high, u16 amp) 1574 { 1575 struct joycon_rumble_freq_data freq_data_low; 1576 struct joycon_rumble_freq_data freq_data_high; 1577 struct joycon_rumble_amp_data amp_data; 1578 1579 freq_data_low = joycon_find_rumble_freq(freq_low); 1580 freq_data_high = joycon_find_rumble_freq(freq_high); 1581 amp_data = joycon_find_rumble_amp(amp); 1582 1583 data[0] = (freq_data_high.high >> 8) & 0xFF; 1584 data[1] = (freq_data_high.high & 0xFF) + amp_data.high; 1585 data[2] = freq_data_low.low + ((amp_data.low >> 8) & 0xFF); 1586 data[3] = amp_data.low & 0xFF; 1587 } 1588 1589 static const u16 JOYCON_MAX_RUMBLE_HIGH_FREQ = 1253; 1590 static const u16 JOYCON_MIN_RUMBLE_HIGH_FREQ = 82; 1591 static const u16 JOYCON_MAX_RUMBLE_LOW_FREQ = 626; 1592 static const u16 JOYCON_MIN_RUMBLE_LOW_FREQ = 41; 1593 1594 static void joycon_clamp_rumble_freqs(struct joycon_ctlr *ctlr) 1595 { 1596 unsigned long flags; 1597 1598 spin_lock_irqsave(&ctlr->lock, flags); 1599 ctlr->rumble_ll_freq = clamp(ctlr->rumble_ll_freq, 1600 JOYCON_MIN_RUMBLE_LOW_FREQ, 1601 JOYCON_MAX_RUMBLE_LOW_FREQ); 1602 ctlr->rumble_lh_freq = clamp(ctlr->rumble_lh_freq, 1603 JOYCON_MIN_RUMBLE_HIGH_FREQ, 1604 JOYCON_MAX_RUMBLE_HIGH_FREQ); 1605 ctlr->rumble_rl_freq = clamp(ctlr->rumble_rl_freq, 1606 JOYCON_MIN_RUMBLE_LOW_FREQ, 1607 JOYCON_MAX_RUMBLE_LOW_FREQ); 1608 ctlr->rumble_rh_freq = clamp(ctlr->rumble_rh_freq, 1609 JOYCON_MIN_RUMBLE_HIGH_FREQ, 1610 JOYCON_MAX_RUMBLE_HIGH_FREQ); 1611 spin_unlock_irqrestore(&ctlr->lock, flags); 1612 } 1613 1614 static int joycon_set_rumble(struct joycon_ctlr *ctlr, u16 amp_r, u16 amp_l, 1615 bool schedule_now) 1616 { 1617 u8 data[JC_RUMBLE_DATA_SIZE]; 1618 u16 amp; 1619 u16 freq_r_low; 1620 u16 freq_r_high; 1621 u16 freq_l_low; 1622 u16 freq_l_high; 1623 unsigned long flags; 1624 int next_rq_head; 1625 1626 spin_lock_irqsave(&ctlr->lock, flags); 1627 freq_r_low = ctlr->rumble_rl_freq; 1628 freq_r_high = ctlr->rumble_rh_freq; 1629 freq_l_low = ctlr->rumble_ll_freq; 1630 freq_l_high = ctlr->rumble_lh_freq; 1631 /* limit number of silent rumble packets to reduce traffic */ 1632 if (amp_l != 0 || amp_r != 0) 1633 ctlr->rumble_zero_countdown = JC_RUMBLE_ZERO_AMP_PKT_CNT; 1634 spin_unlock_irqrestore(&ctlr->lock, flags); 1635 1636 /* right joy-con */ 1637 amp = amp_r * (u32)joycon_max_rumble_amp / 65535; 1638 joycon_encode_rumble(data + 4, freq_r_low, freq_r_high, amp); 1639 1640 /* left joy-con */ 1641 amp = amp_l * (u32)joycon_max_rumble_amp / 65535; 1642 joycon_encode_rumble(data, freq_l_low, freq_l_high, amp); 1643 1644 spin_lock_irqsave(&ctlr->lock, flags); 1645 1646 next_rq_head = ctlr->rumble_queue_head + 1; 1647 if (next_rq_head >= JC_RUMBLE_QUEUE_SIZE) 1648 next_rq_head = 0; 1649 1650 /* Did we overrun the circular buffer? 1651 * If so, be sure we keep the latest intended rumble state. 1652 */ 1653 if (next_rq_head == ctlr->rumble_queue_tail) { 1654 hid_dbg(ctlr->hdev, "rumble queue is full"); 1655 /* overwrite the prior value at the end of the circular buf */ 1656 next_rq_head = ctlr->rumble_queue_head; 1657 } 1658 1659 ctlr->rumble_queue_head = next_rq_head; 1660 memcpy(ctlr->rumble_data[ctlr->rumble_queue_head], data, 1661 JC_RUMBLE_DATA_SIZE); 1662 1663 /* don't wait for the periodic send (reduces latency) */ 1664 if (schedule_now && ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED) 1665 queue_work(ctlr->rumble_queue, &ctlr->rumble_worker); 1666 1667 spin_unlock_irqrestore(&ctlr->lock, flags); 1668 1669 return 0; 1670 } 1671 1672 static int joycon_play_effect(struct input_dev *dev, void *data, 1673 struct ff_effect *effect) 1674 { 1675 struct joycon_ctlr *ctlr = input_get_drvdata(dev); 1676 1677 if (effect->type != FF_RUMBLE) 1678 return 0; 1679 1680 return joycon_set_rumble(ctlr, 1681 effect->u.rumble.weak_magnitude, 1682 effect->u.rumble.strong_magnitude, 1683 true); 1684 } 1685 #endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */ 1686 1687 static const unsigned int joycon_button_inputs_l[] = { 1688 BTN_SELECT, BTN_Z, BTN_THUMBL, 1689 BTN_TL, BTN_TL2, 1690 0 /* 0 signals end of array */ 1691 }; 1692 1693 static const unsigned int joycon_button_inputs_r[] = { 1694 BTN_START, BTN_MODE, BTN_THUMBR, 1695 BTN_SOUTH, BTN_EAST, BTN_NORTH, BTN_WEST, 1696 BTN_TR, BTN_TR2, 1697 0 /* 0 signals end of array */ 1698 }; 1699 1700 /* We report joy-con d-pad inputs as buttons and pro controller as a hat. */ 1701 static const unsigned int joycon_dpad_inputs_jc[] = { 1702 BTN_DPAD_UP, BTN_DPAD_DOWN, BTN_DPAD_LEFT, BTN_DPAD_RIGHT, 1703 0 /* 0 signals end of array */ 1704 }; 1705 1706 static int joycon_input_create(struct joycon_ctlr *ctlr) 1707 { 1708 struct hid_device *hdev; 1709 const char *name; 1710 const char *imu_name; 1711 int ret; 1712 int i; 1713 1714 hdev = ctlr->hdev; 1715 1716 switch (hdev->product) { 1717 case USB_DEVICE_ID_NINTENDO_PROCON: 1718 name = "Nintendo Switch Pro Controller"; 1719 imu_name = "Nintendo Switch Pro Controller IMU"; 1720 break; 1721 case USB_DEVICE_ID_NINTENDO_CHRGGRIP: 1722 if (jc_type_has_left(ctlr)) { 1723 name = "Nintendo Switch Left Joy-Con (Grip)"; 1724 imu_name = "Nintendo Switch Left Joy-Con IMU (Grip)"; 1725 } else { 1726 name = "Nintendo Switch Right Joy-Con (Grip)"; 1727 imu_name = "Nintendo Switch Right Joy-Con IMU (Grip)"; 1728 } 1729 break; 1730 case USB_DEVICE_ID_NINTENDO_JOYCONL: 1731 name = "Nintendo Switch Left Joy-Con"; 1732 imu_name = "Nintendo Switch Left Joy-Con IMU"; 1733 break; 1734 case USB_DEVICE_ID_NINTENDO_JOYCONR: 1735 name = "Nintendo Switch Right Joy-Con"; 1736 imu_name = "Nintendo Switch Right Joy-Con IMU"; 1737 break; 1738 default: /* Should be impossible */ 1739 hid_err(hdev, "Invalid hid product\n"); 1740 return -EINVAL; 1741 } 1742 1743 ctlr->input = devm_input_allocate_device(&hdev->dev); 1744 if (!ctlr->input) 1745 return -ENOMEM; 1746 ctlr->input->id.bustype = hdev->bus; 1747 ctlr->input->id.vendor = hdev->vendor; 1748 ctlr->input->id.product = hdev->product; 1749 ctlr->input->id.version = hdev->version; 1750 ctlr->input->uniq = ctlr->mac_addr_str; 1751 ctlr->input->name = name; 1752 ctlr->input->phys = hdev->phys; 1753 input_set_drvdata(ctlr->input, ctlr); 1754 1755 /* set up sticks and buttons */ 1756 if (jc_type_has_left(ctlr)) { 1757 input_set_abs_params(ctlr->input, ABS_X, 1758 -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG, 1759 JC_STICK_FUZZ, JC_STICK_FLAT); 1760 input_set_abs_params(ctlr->input, ABS_Y, 1761 -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG, 1762 JC_STICK_FUZZ, JC_STICK_FLAT); 1763 1764 for (i = 0; joycon_button_inputs_l[i] > 0; i++) 1765 input_set_capability(ctlr->input, EV_KEY, 1766 joycon_button_inputs_l[i]); 1767 1768 /* configure d-pad differently for joy-con vs pro controller */ 1769 if (hdev->product != USB_DEVICE_ID_NINTENDO_PROCON) { 1770 for (i = 0; joycon_dpad_inputs_jc[i] > 0; i++) 1771 input_set_capability(ctlr->input, EV_KEY, 1772 joycon_dpad_inputs_jc[i]); 1773 } else { 1774 input_set_abs_params(ctlr->input, ABS_HAT0X, 1775 -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG, 1776 JC_DPAD_FUZZ, JC_DPAD_FLAT); 1777 input_set_abs_params(ctlr->input, ABS_HAT0Y, 1778 -JC_MAX_DPAD_MAG, JC_MAX_DPAD_MAG, 1779 JC_DPAD_FUZZ, JC_DPAD_FLAT); 1780 } 1781 } 1782 if (jc_type_has_right(ctlr)) { 1783 input_set_abs_params(ctlr->input, ABS_RX, 1784 -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG, 1785 JC_STICK_FUZZ, JC_STICK_FLAT); 1786 input_set_abs_params(ctlr->input, ABS_RY, 1787 -JC_MAX_STICK_MAG, JC_MAX_STICK_MAG, 1788 JC_STICK_FUZZ, JC_STICK_FLAT); 1789 1790 for (i = 0; joycon_button_inputs_r[i] > 0; i++) 1791 input_set_capability(ctlr->input, EV_KEY, 1792 joycon_button_inputs_r[i]); 1793 } 1794 1795 /* Let's report joy-con S triggers separately */ 1796 if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL) { 1797 input_set_capability(ctlr->input, EV_KEY, BTN_TR); 1798 input_set_capability(ctlr->input, EV_KEY, BTN_TR2); 1799 } else if (hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR) { 1800 input_set_capability(ctlr->input, EV_KEY, BTN_TL); 1801 input_set_capability(ctlr->input, EV_KEY, BTN_TL2); 1802 } 1803 1804 #if IS_ENABLED(CONFIG_NINTENDO_FF) 1805 /* set up rumble */ 1806 input_set_capability(ctlr->input, EV_FF, FF_RUMBLE); 1807 input_ff_create_memless(ctlr->input, NULL, joycon_play_effect); 1808 ctlr->rumble_ll_freq = JC_RUMBLE_DFLT_LOW_FREQ; 1809 ctlr->rumble_lh_freq = JC_RUMBLE_DFLT_HIGH_FREQ; 1810 ctlr->rumble_rl_freq = JC_RUMBLE_DFLT_LOW_FREQ; 1811 ctlr->rumble_rh_freq = JC_RUMBLE_DFLT_HIGH_FREQ; 1812 joycon_clamp_rumble_freqs(ctlr); 1813 joycon_set_rumble(ctlr, 0, 0, false); 1814 ctlr->rumble_msecs = jiffies_to_msecs(jiffies); 1815 #endif 1816 1817 ret = input_register_device(ctlr->input); 1818 if (ret) 1819 return ret; 1820 1821 /* configure the imu input device */ 1822 ctlr->imu_input = devm_input_allocate_device(&hdev->dev); 1823 if (!ctlr->imu_input) 1824 return -ENOMEM; 1825 1826 ctlr->imu_input->id.bustype = hdev->bus; 1827 ctlr->imu_input->id.vendor = hdev->vendor; 1828 ctlr->imu_input->id.product = hdev->product; 1829 ctlr->imu_input->id.version = hdev->version; 1830 ctlr->imu_input->uniq = ctlr->mac_addr_str; 1831 ctlr->imu_input->name = imu_name; 1832 ctlr->imu_input->phys = hdev->phys; 1833 input_set_drvdata(ctlr->imu_input, ctlr); 1834 1835 /* configure imu axes */ 1836 input_set_abs_params(ctlr->imu_input, ABS_X, 1837 -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG, 1838 JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT); 1839 input_set_abs_params(ctlr->imu_input, ABS_Y, 1840 -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG, 1841 JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT); 1842 input_set_abs_params(ctlr->imu_input, ABS_Z, 1843 -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG, 1844 JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT); 1845 input_abs_set_res(ctlr->imu_input, ABS_X, JC_IMU_ACCEL_RES_PER_G); 1846 input_abs_set_res(ctlr->imu_input, ABS_Y, JC_IMU_ACCEL_RES_PER_G); 1847 input_abs_set_res(ctlr->imu_input, ABS_Z, JC_IMU_ACCEL_RES_PER_G); 1848 1849 input_set_abs_params(ctlr->imu_input, ABS_RX, 1850 -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG, 1851 JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT); 1852 input_set_abs_params(ctlr->imu_input, ABS_RY, 1853 -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG, 1854 JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT); 1855 input_set_abs_params(ctlr->imu_input, ABS_RZ, 1856 -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG, 1857 JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT); 1858 1859 input_abs_set_res(ctlr->imu_input, ABS_RX, JC_IMU_GYRO_RES_PER_DPS); 1860 input_abs_set_res(ctlr->imu_input, ABS_RY, JC_IMU_GYRO_RES_PER_DPS); 1861 input_abs_set_res(ctlr->imu_input, ABS_RZ, JC_IMU_GYRO_RES_PER_DPS); 1862 1863 __set_bit(EV_MSC, ctlr->imu_input->evbit); 1864 __set_bit(MSC_TIMESTAMP, ctlr->imu_input->mscbit); 1865 __set_bit(INPUT_PROP_ACCELEROMETER, ctlr->imu_input->propbit); 1866 1867 ret = input_register_device(ctlr->imu_input); 1868 if (ret) 1869 return ret; 1870 1871 return 0; 1872 } 1873 1874 /* Because the subcommand sets all the leds at once, the brightness argument is ignored */ 1875 static int joycon_player_led_brightness_set(struct led_classdev *led, 1876 enum led_brightness brightness) 1877 { 1878 struct device *dev = led->dev->parent; 1879 struct hid_device *hdev = to_hid_device(dev); 1880 struct joycon_ctlr *ctlr; 1881 int val = 0; 1882 int i; 1883 int ret; 1884 1885 ctlr = hid_get_drvdata(hdev); 1886 if (!ctlr) { 1887 hid_err(hdev, "No controller data\n"); 1888 return -ENODEV; 1889 } 1890 1891 for (i = 0; i < JC_NUM_LEDS; i++) 1892 val |= ctlr->leds[i].brightness << i; 1893 1894 mutex_lock(&ctlr->output_mutex); 1895 ret = joycon_set_player_leds(ctlr, 0, val); 1896 mutex_unlock(&ctlr->output_mutex); 1897 1898 return ret; 1899 } 1900 1901 static int joycon_home_led_brightness_set(struct led_classdev *led, 1902 enum led_brightness brightness) 1903 { 1904 struct device *dev = led->dev->parent; 1905 struct hid_device *hdev = to_hid_device(dev); 1906 struct joycon_ctlr *ctlr; 1907 int ret; 1908 1909 ctlr = hid_get_drvdata(hdev); 1910 if (!ctlr) { 1911 hid_err(hdev, "No controller data\n"); 1912 return -ENODEV; 1913 } 1914 mutex_lock(&ctlr->output_mutex); 1915 ret = joycon_set_home_led(ctlr, brightness); 1916 mutex_unlock(&ctlr->output_mutex); 1917 return ret; 1918 } 1919 1920 static DEFINE_SPINLOCK(joycon_input_num_spinlock); 1921 static int joycon_leds_create(struct joycon_ctlr *ctlr) 1922 { 1923 struct hid_device *hdev = ctlr->hdev; 1924 struct device *dev = &hdev->dev; 1925 const char *d_name = dev_name(dev); 1926 struct led_classdev *led; 1927 int led_val = 0; 1928 char *name; 1929 int ret; 1930 int i; 1931 unsigned long flags; 1932 int player_led_pattern; 1933 static int input_num; 1934 1935 /* 1936 * Set the player leds based on controller number 1937 * Because there is no standard concept of "player number", the pattern 1938 * number will simply increase by 1 every time a controller is connected. 1939 */ 1940 spin_lock_irqsave(&joycon_input_num_spinlock, flags); 1941 player_led_pattern = input_num++ % JC_NUM_LED_PATTERNS; 1942 spin_unlock_irqrestore(&joycon_input_num_spinlock, flags); 1943 1944 /* configure the player LEDs */ 1945 for (i = 0; i < JC_NUM_LEDS; i++) { 1946 name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s", 1947 d_name, 1948 "green", 1949 joycon_player_led_names[i]); 1950 if (!name) 1951 return -ENOMEM; 1952 1953 led = &ctlr->leds[i]; 1954 led->name = name; 1955 led->brightness = joycon_player_led_patterns[player_led_pattern][i]; 1956 led->max_brightness = 1; 1957 led->brightness_set_blocking = 1958 joycon_player_led_brightness_set; 1959 led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE; 1960 1961 led_val |= joycon_player_led_patterns[player_led_pattern][i] << i; 1962 } 1963 mutex_lock(&ctlr->output_mutex); 1964 ret = joycon_set_player_leds(ctlr, 0, led_val); 1965 mutex_unlock(&ctlr->output_mutex); 1966 if (ret) { 1967 hid_warn(hdev, "Failed to set players LEDs, skipping registration; ret=%d\n", ret); 1968 goto home_led; 1969 } 1970 1971 for (i = 0; i < JC_NUM_LEDS; i++) { 1972 led = &ctlr->leds[i]; 1973 ret = devm_led_classdev_register(&hdev->dev, led); 1974 if (ret) { 1975 hid_err(hdev, "Failed to register player %d LED; ret=%d\n", i + 1, ret); 1976 return ret; 1977 } 1978 } 1979 1980 home_led: 1981 /* configure the home LED */ 1982 if (jc_type_has_right(ctlr)) { 1983 name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s:%s", 1984 d_name, 1985 "blue", 1986 LED_FUNCTION_PLAYER5); 1987 if (!name) 1988 return -ENOMEM; 1989 1990 led = &ctlr->home_led; 1991 led->name = name; 1992 led->brightness = 0; 1993 led->max_brightness = 0xF; 1994 led->brightness_set_blocking = joycon_home_led_brightness_set; 1995 led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE; 1996 1997 /* Set the home LED to 0 as default state */ 1998 mutex_lock(&ctlr->output_mutex); 1999 ret = joycon_set_home_led(ctlr, 0); 2000 mutex_unlock(&ctlr->output_mutex); 2001 if (ret) { 2002 hid_warn(hdev, "Failed to set home LED, skipping registration; ret=%d\n", ret); 2003 return 0; 2004 } 2005 2006 ret = devm_led_classdev_register(&hdev->dev, led); 2007 if (ret) { 2008 hid_err(hdev, "Failed to register home LED; ret=%d\n", ret); 2009 return ret; 2010 } 2011 } 2012 2013 return 0; 2014 } 2015 2016 static int joycon_battery_get_property(struct power_supply *supply, 2017 enum power_supply_property prop, 2018 union power_supply_propval *val) 2019 { 2020 struct joycon_ctlr *ctlr = power_supply_get_drvdata(supply); 2021 unsigned long flags; 2022 int ret = 0; 2023 u8 capacity; 2024 bool charging; 2025 bool powered; 2026 2027 spin_lock_irqsave(&ctlr->lock, flags); 2028 capacity = ctlr->battery_capacity; 2029 charging = ctlr->battery_charging; 2030 powered = ctlr->host_powered; 2031 spin_unlock_irqrestore(&ctlr->lock, flags); 2032 2033 switch (prop) { 2034 case POWER_SUPPLY_PROP_PRESENT: 2035 val->intval = 1; 2036 break; 2037 case POWER_SUPPLY_PROP_SCOPE: 2038 val->intval = POWER_SUPPLY_SCOPE_DEVICE; 2039 break; 2040 case POWER_SUPPLY_PROP_CAPACITY_LEVEL: 2041 val->intval = capacity; 2042 break; 2043 case POWER_SUPPLY_PROP_STATUS: 2044 if (charging) 2045 val->intval = POWER_SUPPLY_STATUS_CHARGING; 2046 else if (capacity == POWER_SUPPLY_CAPACITY_LEVEL_FULL && 2047 powered) 2048 val->intval = POWER_SUPPLY_STATUS_FULL; 2049 else 2050 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 2051 break; 2052 default: 2053 ret = -EINVAL; 2054 break; 2055 } 2056 return ret; 2057 } 2058 2059 static enum power_supply_property joycon_battery_props[] = { 2060 POWER_SUPPLY_PROP_PRESENT, 2061 POWER_SUPPLY_PROP_CAPACITY_LEVEL, 2062 POWER_SUPPLY_PROP_SCOPE, 2063 POWER_SUPPLY_PROP_STATUS, 2064 }; 2065 2066 static int joycon_power_supply_create(struct joycon_ctlr *ctlr) 2067 { 2068 struct hid_device *hdev = ctlr->hdev; 2069 struct power_supply_config supply_config = { .drv_data = ctlr, }; 2070 const char * const name_fmt = "nintendo_switch_controller_battery_%s"; 2071 int ret = 0; 2072 2073 /* Set initially to unknown before receiving first input report */ 2074 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; 2075 2076 /* Configure the battery's description */ 2077 ctlr->battery_desc.properties = joycon_battery_props; 2078 ctlr->battery_desc.num_properties = 2079 ARRAY_SIZE(joycon_battery_props); 2080 ctlr->battery_desc.get_property = joycon_battery_get_property; 2081 ctlr->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY; 2082 ctlr->battery_desc.use_for_apm = 0; 2083 ctlr->battery_desc.name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 2084 name_fmt, 2085 dev_name(&hdev->dev)); 2086 if (!ctlr->battery_desc.name) 2087 return -ENOMEM; 2088 2089 ctlr->battery = devm_power_supply_register(&hdev->dev, 2090 &ctlr->battery_desc, 2091 &supply_config); 2092 if (IS_ERR(ctlr->battery)) { 2093 ret = PTR_ERR(ctlr->battery); 2094 hid_err(hdev, "Failed to register battery; ret=%d\n", ret); 2095 return ret; 2096 } 2097 2098 return power_supply_powers(ctlr->battery, &hdev->dev); 2099 } 2100 2101 static int joycon_read_info(struct joycon_ctlr *ctlr) 2102 { 2103 int ret; 2104 int i; 2105 int j; 2106 struct joycon_subcmd_request req = { 0 }; 2107 struct joycon_input_report *report; 2108 2109 req.subcmd_id = JC_SUBCMD_REQ_DEV_INFO; 2110 mutex_lock(&ctlr->output_mutex); 2111 ret = joycon_send_subcmd(ctlr, &req, 0, HZ); 2112 mutex_unlock(&ctlr->output_mutex); 2113 if (ret) { 2114 hid_err(ctlr->hdev, "Failed to get joycon info; ret=%d\n", ret); 2115 return ret; 2116 } 2117 2118 report = (struct joycon_input_report *)ctlr->input_buf; 2119 2120 for (i = 4, j = 0; j < 6; i++, j++) 2121 ctlr->mac_addr[j] = report->subcmd_reply.data[i]; 2122 2123 ctlr->mac_addr_str = devm_kasprintf(&ctlr->hdev->dev, GFP_KERNEL, 2124 "%02X:%02X:%02X:%02X:%02X:%02X", 2125 ctlr->mac_addr[0], 2126 ctlr->mac_addr[1], 2127 ctlr->mac_addr[2], 2128 ctlr->mac_addr[3], 2129 ctlr->mac_addr[4], 2130 ctlr->mac_addr[5]); 2131 if (!ctlr->mac_addr_str) 2132 return -ENOMEM; 2133 hid_info(ctlr->hdev, "controller MAC = %s\n", ctlr->mac_addr_str); 2134 2135 /* Retrieve the type so we can distinguish for charging grip */ 2136 ctlr->ctlr_type = report->subcmd_reply.data[2]; 2137 2138 return 0; 2139 } 2140 2141 static int joycon_init(struct hid_device *hdev) 2142 { 2143 struct joycon_ctlr *ctlr = hid_get_drvdata(hdev); 2144 int ret = 0; 2145 2146 mutex_lock(&ctlr->output_mutex); 2147 /* if handshake command fails, assume ble pro controller */ 2148 if ((jc_type_is_procon(ctlr) || jc_type_is_chrggrip(ctlr)) && 2149 !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ)) { 2150 hid_dbg(hdev, "detected USB controller\n"); 2151 /* set baudrate for improved latency */ 2152 ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M, HZ); 2153 if (ret) { 2154 hid_err(hdev, "Failed to set baudrate; ret=%d\n", ret); 2155 goto out_unlock; 2156 } 2157 /* handshake */ 2158 ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ); 2159 if (ret) { 2160 hid_err(hdev, "Failed handshake; ret=%d\n", ret); 2161 goto out_unlock; 2162 } 2163 /* 2164 * Set no timeout (to keep controller in USB mode). 2165 * This doesn't send a response, so ignore the timeout. 2166 */ 2167 joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT, HZ/10); 2168 } else if (jc_type_is_chrggrip(ctlr)) { 2169 hid_err(hdev, "Failed charging grip handshake\n"); 2170 ret = -ETIMEDOUT; 2171 goto out_unlock; 2172 } 2173 2174 /* get controller calibration data, and parse it */ 2175 ret = joycon_request_calibration(ctlr); 2176 if (ret) { 2177 /* 2178 * We can function with default calibration, but it may be 2179 * inaccurate. Provide a warning, and continue on. 2180 */ 2181 hid_warn(hdev, "Analog stick positions may be inaccurate\n"); 2182 } 2183 2184 /* get IMU calibration data, and parse it */ 2185 ret = joycon_request_imu_calibration(ctlr); 2186 if (ret) { 2187 /* 2188 * We can function with default calibration, but it may be 2189 * inaccurate. Provide a warning, and continue on. 2190 */ 2191 hid_warn(hdev, "Unable to read IMU calibration data\n"); 2192 } 2193 2194 /* Set the reporting mode to 0x30, which is the full report mode */ 2195 ret = joycon_set_report_mode(ctlr); 2196 if (ret) { 2197 hid_err(hdev, "Failed to set report mode; ret=%d\n", ret); 2198 goto out_unlock; 2199 } 2200 2201 /* Enable rumble */ 2202 ret = joycon_enable_rumble(ctlr); 2203 if (ret) { 2204 hid_err(hdev, "Failed to enable rumble; ret=%d\n", ret); 2205 goto out_unlock; 2206 } 2207 2208 /* Enable the IMU */ 2209 ret = joycon_enable_imu(ctlr); 2210 if (ret) { 2211 hid_err(hdev, "Failed to enable the IMU; ret=%d\n", ret); 2212 goto out_unlock; 2213 } 2214 2215 out_unlock: 2216 mutex_unlock(&ctlr->output_mutex); 2217 return ret; 2218 } 2219 2220 /* Common handler for parsing inputs */ 2221 static int joycon_ctlr_read_handler(struct joycon_ctlr *ctlr, u8 *data, 2222 int size) 2223 { 2224 if (data[0] == JC_INPUT_SUBCMD_REPLY || data[0] == JC_INPUT_IMU_DATA || 2225 data[0] == JC_INPUT_MCU_DATA) { 2226 if (size >= 12) /* make sure it contains the input report */ 2227 joycon_parse_report(ctlr, 2228 (struct joycon_input_report *)data); 2229 } 2230 2231 return 0; 2232 } 2233 2234 static int joycon_ctlr_handle_event(struct joycon_ctlr *ctlr, u8 *data, 2235 int size) 2236 { 2237 int ret = 0; 2238 bool match = false; 2239 struct joycon_input_report *report; 2240 2241 if (unlikely(mutex_is_locked(&ctlr->output_mutex)) && 2242 ctlr->msg_type != JOYCON_MSG_TYPE_NONE) { 2243 switch (ctlr->msg_type) { 2244 case JOYCON_MSG_TYPE_USB: 2245 if (size < 2) 2246 break; 2247 if (data[0] == JC_INPUT_USB_RESPONSE && 2248 data[1] == ctlr->usb_ack_match) 2249 match = true; 2250 break; 2251 case JOYCON_MSG_TYPE_SUBCMD: 2252 if (size < sizeof(struct joycon_input_report) || 2253 data[0] != JC_INPUT_SUBCMD_REPLY) 2254 break; 2255 report = (struct joycon_input_report *)data; 2256 if (report->subcmd_reply.id == ctlr->subcmd_ack_match) 2257 match = true; 2258 break; 2259 default: 2260 break; 2261 } 2262 2263 if (match) { 2264 memcpy(ctlr->input_buf, data, 2265 min(size, (int)JC_MAX_RESP_SIZE)); 2266 ctlr->msg_type = JOYCON_MSG_TYPE_NONE; 2267 ctlr->received_resp = true; 2268 wake_up(&ctlr->wait); 2269 2270 /* This message has been handled */ 2271 return 1; 2272 } 2273 } 2274 2275 if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) 2276 ret = joycon_ctlr_read_handler(ctlr, data, size); 2277 2278 return ret; 2279 } 2280 2281 static int nintendo_hid_event(struct hid_device *hdev, 2282 struct hid_report *report, u8 *raw_data, int size) 2283 { 2284 struct joycon_ctlr *ctlr = hid_get_drvdata(hdev); 2285 2286 if (size < 1) 2287 return -EINVAL; 2288 2289 return joycon_ctlr_handle_event(ctlr, raw_data, size); 2290 } 2291 2292 static int nintendo_hid_probe(struct hid_device *hdev, 2293 const struct hid_device_id *id) 2294 { 2295 int ret; 2296 struct joycon_ctlr *ctlr; 2297 2298 hid_dbg(hdev, "probe - start\n"); 2299 2300 ctlr = devm_kzalloc(&hdev->dev, sizeof(*ctlr), GFP_KERNEL); 2301 if (!ctlr) { 2302 ret = -ENOMEM; 2303 goto err; 2304 } 2305 2306 ctlr->hdev = hdev; 2307 ctlr->ctlr_state = JOYCON_CTLR_STATE_INIT; 2308 ctlr->rumble_queue_head = 0; 2309 ctlr->rumble_queue_tail = 0; 2310 hid_set_drvdata(hdev, ctlr); 2311 mutex_init(&ctlr->output_mutex); 2312 init_waitqueue_head(&ctlr->wait); 2313 spin_lock_init(&ctlr->lock); 2314 ctlr->rumble_queue = alloc_workqueue("hid-nintendo-rumble_wq", 2315 WQ_FREEZABLE | WQ_MEM_RECLAIM, 0); 2316 if (!ctlr->rumble_queue) { 2317 ret = -ENOMEM; 2318 goto err; 2319 } 2320 INIT_WORK(&ctlr->rumble_worker, joycon_rumble_worker); 2321 2322 ret = hid_parse(hdev); 2323 if (ret) { 2324 hid_err(hdev, "HID parse failed\n"); 2325 goto err_wq; 2326 } 2327 2328 /* 2329 * Patch the hw version of pro controller/joycons, so applications can 2330 * distinguish between the default HID mappings and the mappings defined 2331 * by the Linux game controller spec. This is important for the SDL2 2332 * library, which has a game controller database, which uses device ids 2333 * in combination with version as a key. 2334 */ 2335 hdev->version |= 0x8000; 2336 2337 ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW); 2338 if (ret) { 2339 hid_err(hdev, "HW start failed\n"); 2340 goto err_wq; 2341 } 2342 2343 ret = hid_hw_open(hdev); 2344 if (ret) { 2345 hid_err(hdev, "cannot start hardware I/O\n"); 2346 goto err_stop; 2347 } 2348 2349 hid_device_io_start(hdev); 2350 2351 ret = joycon_init(hdev); 2352 if (ret) { 2353 hid_err(hdev, "Failed to initialize controller; ret=%d\n", ret); 2354 goto err_close; 2355 } 2356 2357 ret = joycon_read_info(ctlr); 2358 if (ret) { 2359 hid_err(hdev, "Failed to retrieve controller info; ret=%d\n", 2360 ret); 2361 goto err_close; 2362 } 2363 2364 /* Initialize the leds */ 2365 ret = joycon_leds_create(ctlr); 2366 if (ret) { 2367 hid_err(hdev, "Failed to create leds; ret=%d\n", ret); 2368 goto err_close; 2369 } 2370 2371 /* Initialize the battery power supply */ 2372 ret = joycon_power_supply_create(ctlr); 2373 if (ret) { 2374 hid_err(hdev, "Failed to create power_supply; ret=%d\n", ret); 2375 goto err_close; 2376 } 2377 2378 ret = joycon_input_create(ctlr); 2379 if (ret) { 2380 hid_err(hdev, "Failed to create input device; ret=%d\n", ret); 2381 goto err_close; 2382 } 2383 2384 ctlr->ctlr_state = JOYCON_CTLR_STATE_READ; 2385 2386 hid_dbg(hdev, "probe - success\n"); 2387 return 0; 2388 2389 err_close: 2390 hid_hw_close(hdev); 2391 err_stop: 2392 hid_hw_stop(hdev); 2393 err_wq: 2394 destroy_workqueue(ctlr->rumble_queue); 2395 err: 2396 hid_err(hdev, "probe - fail = %d\n", ret); 2397 return ret; 2398 } 2399 2400 static void nintendo_hid_remove(struct hid_device *hdev) 2401 { 2402 struct joycon_ctlr *ctlr = hid_get_drvdata(hdev); 2403 unsigned long flags; 2404 2405 hid_dbg(hdev, "remove\n"); 2406 2407 /* Prevent further attempts at sending subcommands. */ 2408 spin_lock_irqsave(&ctlr->lock, flags); 2409 ctlr->ctlr_state = JOYCON_CTLR_STATE_REMOVED; 2410 spin_unlock_irqrestore(&ctlr->lock, flags); 2411 2412 destroy_workqueue(ctlr->rumble_queue); 2413 2414 hid_hw_close(hdev); 2415 hid_hw_stop(hdev); 2416 } 2417 2418 #ifdef CONFIG_PM 2419 2420 static int nintendo_hid_resume(struct hid_device *hdev) 2421 { 2422 int ret = joycon_init(hdev); 2423 2424 if (ret) 2425 hid_err(hdev, "Failed to restore controller after resume"); 2426 2427 return ret; 2428 } 2429 2430 #endif 2431 2432 static const struct hid_device_id nintendo_hid_devices[] = { 2433 { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO, 2434 USB_DEVICE_ID_NINTENDO_PROCON) }, 2435 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, 2436 USB_DEVICE_ID_NINTENDO_PROCON) }, 2437 { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO, 2438 USB_DEVICE_ID_NINTENDO_CHRGGRIP) }, 2439 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, 2440 USB_DEVICE_ID_NINTENDO_JOYCONL) }, 2441 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO, 2442 USB_DEVICE_ID_NINTENDO_JOYCONR) }, 2443 { } 2444 }; 2445 MODULE_DEVICE_TABLE(hid, nintendo_hid_devices); 2446 2447 static struct hid_driver nintendo_hid_driver = { 2448 .name = "nintendo", 2449 .id_table = nintendo_hid_devices, 2450 .probe = nintendo_hid_probe, 2451 .remove = nintendo_hid_remove, 2452 .raw_event = nintendo_hid_event, 2453 2454 #ifdef CONFIG_PM 2455 .resume = nintendo_hid_resume, 2456 #endif 2457 }; 2458 module_hid_driver(nintendo_hid_driver); 2459 2460 MODULE_LICENSE("GPL"); 2461 MODULE_AUTHOR("Daniel J. Ogorchock <djogorchock@gmail.com>"); 2462 MODULE_DESCRIPTION("Driver for Nintendo Switch Controllers"); 2463 2464