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 * Portions Copyright (c) 2020 Nadia Holmquist Pedersen <nadia@nhp.sh>
7 * Copyright (c) 2022 Emily Strickland <linux@emily.st>
8 * Copyright (c) 2023 Ryan McClelland <rymcclel@gmail.com>
9 *
10 * The following resources/projects were referenced for this driver:
11 * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
12 * https://gitlab.com/pjranki/joycon-linux-kernel (Peter Rankin)
13 * https://github.com/FrotBot/SwitchProConLinuxUSB
14 * https://github.com/MTCKC/ProconXInput
15 * https://github.com/Davidobot/BetterJoyForCemu
16 * hid-wiimote kernel hid driver
17 * hid-logitech-hidpp driver
18 * hid-sony driver
19 *
20 * This driver supports the Nintendo Switch Joy-Cons and Pro Controllers. The
21 * Pro Controllers can either be used over USB or Bluetooth.
22 *
23 * This driver also incorporates support for Nintendo Switch Online controllers
24 * for the NES, SNES, Sega Genesis, and N64.
25 *
26 * The driver will retrieve the factory calibration info from the controllers,
27 * so little to no user calibration should be required.
28 *
29 */
30
31#include "hid-ids.h"
32#include <linux/unaligned.h>
33#include <linux/delay.h>
34#include <linux/device.h>
35#include <linux/kernel.h>
36#include <linux/hid.h>
37#include <linux/idr.h>
38#include <linux/input.h>
39#include <linux/jiffies.h>
40#include <linux/leds.h>
41#include <linux/module.h>
42#include <linux/power_supply.h>
43#include <linux/spinlock.h>
44
45/*
46 * Reference the url below for the following HID report defines:
47 * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
48 */
49
50/* Output Reports */
51#define JC_OUTPUT_RUMBLE_AND_SUBCMD 0x01
52#define JC_OUTPUT_FW_UPDATE_PKT 0x03
53#define JC_OUTPUT_RUMBLE_ONLY 0x10
54#define JC_OUTPUT_MCU_DATA 0x11
55#define JC_OUTPUT_USB_CMD 0x80
56
57/* Subcommand IDs */
58#define JC_SUBCMD_STATE 0x00
59#define JC_SUBCMD_MANUAL_BT_PAIRING 0x01
60#define JC_SUBCMD_REQ_DEV_INFO 0x02
61#define JC_SUBCMD_SET_REPORT_MODE 0x03
62#define JC_SUBCMD_TRIGGERS_ELAPSED 0x04
63#define JC_SUBCMD_GET_PAGE_LIST_STATE 0x05
64#define JC_SUBCMD_SET_HCI_STATE 0x06
65#define JC_SUBCMD_RESET_PAIRING_INFO 0x07
66#define JC_SUBCMD_LOW_POWER_MODE 0x08
67#define JC_SUBCMD_SPI_FLASH_READ 0x10
68#define JC_SUBCMD_SPI_FLASH_WRITE 0x11
69#define JC_SUBCMD_RESET_MCU 0x20
70#define JC_SUBCMD_SET_MCU_CONFIG 0x21
71#define JC_SUBCMD_SET_MCU_STATE 0x22
72#define JC_SUBCMD_SET_PLAYER_LIGHTS 0x30
73#define JC_SUBCMD_GET_PLAYER_LIGHTS 0x31
74#define JC_SUBCMD_SET_HOME_LIGHT 0x38
75#define JC_SUBCMD_ENABLE_IMU 0x40
76#define JC_SUBCMD_SET_IMU_SENSITIVITY 0x41
77#define JC_SUBCMD_WRITE_IMU_REG 0x42
78#define JC_SUBCMD_READ_IMU_REG 0x43
79#define JC_SUBCMD_ENABLE_VIBRATION 0x48
80#define JC_SUBCMD_GET_REGULATED_VOLTAGE 0x50
81
82/* Input Reports */
83#define JC_INPUT_BUTTON_EVENT 0x3F
84#define JC_INPUT_SUBCMD_REPLY 0x21
85#define JC_INPUT_IMU_DATA 0x30
86#define JC_INPUT_MCU_DATA 0x31
87#define JC_INPUT_USB_RESPONSE 0x81
88
89/* Feature Reports */
90#define JC_FEATURE_LAST_SUBCMD 0x02
91#define JC_FEATURE_OTA_FW_UPGRADE 0x70
92#define JC_FEATURE_SETUP_MEM_READ 0x71
93#define JC_FEATURE_MEM_READ 0x72
94#define JC_FEATURE_ERASE_MEM_SECTOR 0x73
95#define JC_FEATURE_MEM_WRITE 0x74
96#define JC_FEATURE_LAUNCH 0x75
97
98/* USB Commands */
99#define JC_USB_CMD_CONN_STATUS 0x01
100#define JC_USB_CMD_HANDSHAKE 0x02
101#define JC_USB_CMD_BAUDRATE_3M 0x03
102#define JC_USB_CMD_NO_TIMEOUT 0x04
103#define JC_USB_CMD_EN_TIMEOUT 0x05
104#define JC_USB_RESET 0x06
105#define JC_USB_PRE_HANDSHAKE 0x91
106#define JC_USB_SEND_UART 0x92
107
108/* Magic value denoting presence of user calibration */
109#define JC_CAL_USR_MAGIC_0 0xB2
110#define JC_CAL_USR_MAGIC_1 0xA1
111#define JC_CAL_USR_MAGIC_SIZE 2
112
113/* SPI storage addresses of user calibration data */
114#define JC_CAL_USR_LEFT_MAGIC_ADDR 0x8010
115#define JC_CAL_USR_LEFT_DATA_ADDR 0x8012
116#define JC_CAL_USR_LEFT_DATA_END 0x801A
117#define JC_CAL_USR_RIGHT_MAGIC_ADDR 0x801B
118#define JC_CAL_USR_RIGHT_DATA_ADDR 0x801D
119#define JC_CAL_STICK_DATA_SIZE \
120 (JC_CAL_USR_LEFT_DATA_END - JC_CAL_USR_LEFT_DATA_ADDR + 1)
121
122/* SPI storage addresses of factory calibration data */
123#define JC_CAL_FCT_DATA_LEFT_ADDR 0x603d
124#define JC_CAL_FCT_DATA_RIGHT_ADDR 0x6046
125
126/* SPI storage addresses of IMU factory calibration data */
127#define JC_IMU_CAL_FCT_DATA_ADDR 0x6020
128#define JC_IMU_CAL_FCT_DATA_END 0x6037
129#define JC_IMU_CAL_DATA_SIZE \
130 (JC_IMU_CAL_FCT_DATA_END - JC_IMU_CAL_FCT_DATA_ADDR + 1)
131/* SPI storage addresses of IMU user calibration data */
132#define JC_IMU_CAL_USR_MAGIC_ADDR 0x8026
133#define JC_IMU_CAL_USR_DATA_ADDR 0x8028
134
135/* The raw analog joystick values will be mapped in terms of this magnitude */
136#define JC_MAX_STICK_MAG 32767
137#define JC_STICK_FUZZ 250
138#define JC_STICK_FLAT 500
139
140/* Hat values for pro controller's d-pad */
141#define JC_MAX_DPAD_MAG 1
142#define JC_DPAD_FUZZ 0
143#define JC_DPAD_FLAT 0
144
145/* Under most circumstances IMU reports are pushed every 15ms; use as default */
146#define JC_IMU_DFLT_AVG_DELTA_MS 15
147/* How many samples to sum before calculating average IMU report delta */
148#define JC_IMU_SAMPLES_PER_DELTA_AVG 300
149/* Controls how many dropped IMU packets at once trigger a warning message */
150#define JC_IMU_DROPPED_PKT_WARNING 3
151
152/*
153 * The controller's accelerometer has a sensor resolution of 16bits and is
154 * configured with a range of +-8000 milliGs. Therefore, the resolution can be
155 * calculated thus: (2^16-1)/(8000 * 2) = 4.096 digits per milliG
156 * Resolution per G (rather than per millliG): 4.096 * 1000 = 4096 digits per G
157 * Alternatively: 1/4096 = .0002441 Gs per digit
158 */
159#define JC_IMU_MAX_ACCEL_MAG 32767
160#define JC_IMU_ACCEL_RES_PER_G 4096
161#define JC_IMU_ACCEL_FUZZ 10
162#define JC_IMU_ACCEL_FLAT 0
163
164/*
165 * The controller's gyroscope has a sensor resolution of 16bits and is
166 * configured with a range of +-2000 degrees/second.
167 * Digits per dps: (2^16 -1)/(2000*2) = 16.38375
168 * dps per digit: 16.38375E-1 = .0610
169 *
170 * STMicro recommends in the datasheet to add 15% to the dps/digit. This allows
171 * the full sensitivity range to be saturated without clipping. This yields more
172 * accurate results, so it's the technique this driver uses.
173 * dps per digit (corrected): .0610 * 1.15 = .0702
174 * digits per dps (corrected): .0702E-1 = 14.247
175 *
176 * Now, 14.247 truncating to 14 loses a lot of precision, so we rescale the
177 * min/max range by 1000.
178 */
179#define JC_IMU_PREC_RANGE_SCALE 1000
180/* Note: change mag and res_per_dps if prec_range_scale is ever altered */
181#define JC_IMU_MAX_GYRO_MAG 32767000 /* (2^16-1)*1000 */
182#define JC_IMU_GYRO_RES_PER_DPS 14247 /* (14.247*1000) */
183#define JC_IMU_GYRO_FUZZ 10
184#define JC_IMU_GYRO_FLAT 0
185
186/* frequency/amplitude tables for rumble */
187struct joycon_rumble_freq_data {
188 u16 high;
189 u8 low;
190 u16 freq; /* Hz*/
191};
192
193struct joycon_rumble_amp_data {
194 u8 high;
195 u16 low;
196 u16 amp;
197};
198
199#if IS_ENABLED(CONFIG_NINTENDO_FF)
200/*
201 * These tables are from
202 * https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering/blob/master/rumble_data_table.md
203 */
204static const struct joycon_rumble_freq_data joycon_rumble_frequencies[] = {
205 /* high, low, freq */
206 { 0x0000, 0x01, 41 }, { 0x0000, 0x02, 42 }, { 0x0000, 0x03, 43 },
207 { 0x0000, 0x04, 44 }, { 0x0000, 0x05, 45 }, { 0x0000, 0x06, 46 },
208 { 0x0000, 0x07, 47 }, { 0x0000, 0x08, 48 }, { 0x0000, 0x09, 49 },
209 { 0x0000, 0x0A, 50 }, { 0x0000, 0x0B, 51 }, { 0x0000, 0x0C, 52 },
210 { 0x0000, 0x0D, 53 }, { 0x0000, 0x0E, 54 }, { 0x0000, 0x0F, 55 },
211 { 0x0000, 0x10, 57 }, { 0x0000, 0x11, 58 }, { 0x0000, 0x12, 59 },
212 { 0x0000, 0x13, 60 }, { 0x0000, 0x14, 62 }, { 0x0000, 0x15, 63 },
213 { 0x0000, 0x16, 64 }, { 0x0000, 0x17, 66 }, { 0x0000, 0x18, 67 },
214 { 0x0000, 0x19, 69 }, { 0x0000, 0x1A, 70 }, { 0x0000, 0x1B, 72 },
215 { 0x0000, 0x1C, 73 }, { 0x0000, 0x1D, 75 }, { 0x0000, 0x1e, 77 },
216 { 0x0000, 0x1f, 78 }, { 0x0000, 0x20, 80 }, { 0x0400, 0x21, 82 },
217 { 0x0800, 0x22, 84 }, { 0x0c00, 0x23, 85 }, { 0x1000, 0x24, 87 },
218 { 0x1400, 0x25, 89 }, { 0x1800, 0x26, 91 }, { 0x1c00, 0x27, 93 },
219 { 0x2000, 0x28, 95 }, { 0x2400, 0x29, 97 }, { 0x2800, 0x2a, 99 },
220 { 0x2c00, 0x2b, 102 }, { 0x3000, 0x2c, 104 }, { 0x3400, 0x2d, 106 },
221 { 0x3800, 0x2e, 108 }, { 0x3c00, 0x2f, 111 }, { 0x4000, 0x30, 113 },
222 { 0x4400, 0x31, 116 }, { 0x4800, 0x32, 118 }, { 0x4c00, 0x33, 121 },
223 { 0x5000, 0x34, 123 }, { 0x5400, 0x35, 126 }, { 0x5800, 0x36, 129 },
224 { 0x5c00, 0x37, 132 }, { 0x6000, 0x38, 135 }, { 0x6400, 0x39, 137 },
225 { 0x6800, 0x3a, 141 }, { 0x6c00, 0x3b, 144 }, { 0x7000, 0x3c, 147 },
226 { 0x7400, 0x3d, 150 }, { 0x7800, 0x3e, 153 }, { 0x7c00, 0x3f, 157 },
227 { 0x8000, 0x40, 160 }, { 0x8400, 0x41, 164 }, { 0x8800, 0x42, 167 },
228 { 0x8c00, 0x43, 171 }, { 0x9000, 0x44, 174 }, { 0x9400, 0x45, 178 },
229 { 0x9800, 0x46, 182 }, { 0x9c00, 0x47, 186 }, { 0xa000, 0x48, 190 },
230 { 0xa400, 0x49, 194 }, { 0xa800, 0x4a, 199 }, { 0xac00, 0x4b, 203 },
231 { 0xb000, 0x4c, 207 }, { 0xb400, 0x4d, 212 }, { 0xb800, 0x4e, 217 },
232 { 0xbc00, 0x4f, 221 }, { 0xc000, 0x50, 226 }, { 0xc400, 0x51, 231 },
233 { 0xc800, 0x52, 236 }, { 0xcc00, 0x53, 241 }, { 0xd000, 0x54, 247 },
234 { 0xd400, 0x55, 252 }, { 0xd800, 0x56, 258 }, { 0xdc00, 0x57, 263 },
235 { 0xe000, 0x58, 269 }, { 0xe400, 0x59, 275 }, { 0xe800, 0x5a, 281 },
236 { 0xec00, 0x5b, 287 }, { 0xf000, 0x5c, 293 }, { 0xf400, 0x5d, 300 },
237 { 0xf800, 0x5e, 306 }, { 0xfc00, 0x5f, 313 }, { 0x0001, 0x60, 320 },
238 { 0x0401, 0x61, 327 }, { 0x0801, 0x62, 334 }, { 0x0c01, 0x63, 341 },
239 { 0x1001, 0x64, 349 }, { 0x1401, 0x65, 357 }, { 0x1801, 0x66, 364 },
240 { 0x1c01, 0x67, 372 }, { 0x2001, 0x68, 381 }, { 0x2401, 0x69, 389 },
241 { 0x2801, 0x6a, 397 }, { 0x2c01, 0x6b, 406 }, { 0x3001, 0x6c, 415 },
242 { 0x3401, 0x6d, 424 }, { 0x3801, 0x6e, 433 }, { 0x3c01, 0x6f, 443 },
243 { 0x4001, 0x70, 453 }, { 0x4401, 0x71, 462 }, { 0x4801, 0x72, 473 },
244 { 0x4c01, 0x73, 483 }, { 0x5001, 0x74, 494 }, { 0x5401, 0x75, 504 },
245 { 0x5801, 0x76, 515 }, { 0x5c01, 0x77, 527 }, { 0x6001, 0x78, 538 },
246 { 0x6401, 0x79, 550 }, { 0x6801, 0x7a, 562 }, { 0x6c01, 0x7b, 574 },
247 { 0x7001, 0x7c, 587 }, { 0x7401, 0x7d, 600 }, { 0x7801, 0x7e, 613 },
248 { 0x7c01, 0x7f, 626 }, { 0x8001, 0x00, 640 }, { 0x8401, 0x00, 654 },
249 { 0x8801, 0x00, 668 }, { 0x8c01, 0x00, 683 }, { 0x9001, 0x00, 698 },
250 { 0x9401, 0x00, 713 }, { 0x9801, 0x00, 729 }, { 0x9c01, 0x00, 745 },
251 { 0xa001, 0x00, 761 }, { 0xa401, 0x00, 778 }, { 0xa801, 0x00, 795 },
252 { 0xac01, 0x00, 812 }, { 0xb001, 0x00, 830 }, { 0xb401, 0x00, 848 },
253 { 0xb801, 0x00, 867 }, { 0xbc01, 0x00, 886 }, { 0xc001, 0x00, 905 },
254 { 0xc401, 0x00, 925 }, { 0xc801, 0x00, 945 }, { 0xcc01, 0x00, 966 },
255 { 0xd001, 0x00, 987 }, { 0xd401, 0x00, 1009 }, { 0xd801, 0x00, 1031 },
256 { 0xdc01, 0x00, 1053 }, { 0xe001, 0x00, 1076 }, { 0xe401, 0x00, 1100 },
257 { 0xe801, 0x00, 1124 }, { 0xec01, 0x00, 1149 }, { 0xf001, 0x00, 1174 },
258 { 0xf401, 0x00, 1199 }, { 0xf801, 0x00, 1226 }, { 0xfc01, 0x00, 1253 }
259};
260
261#define joycon_max_rumble_amp (1003)
262static const struct joycon_rumble_amp_data joycon_rumble_amplitudes[] = {
263 /* high, low, amp */
264 { 0x00, 0x0040, 0 },
265 { 0x02, 0x8040, 10 }, { 0x04, 0x0041, 12 }, { 0x06, 0x8041, 14 },
266 { 0x08, 0x0042, 17 }, { 0x0a, 0x8042, 20 }, { 0x0c, 0x0043, 24 },
267 { 0x0e, 0x8043, 28 }, { 0x10, 0x0044, 33 }, { 0x12, 0x8044, 40 },
268 { 0x14, 0x0045, 47 }, { 0x16, 0x8045, 56 }, { 0x18, 0x0046, 67 },
269 { 0x1a, 0x8046, 80 }, { 0x1c, 0x0047, 95 }, { 0x1e, 0x8047, 112 },
270 { 0x20, 0x0048, 117 }, { 0x22, 0x8048, 123 }, { 0x24, 0x0049, 128 },
271 { 0x26, 0x8049, 134 }, { 0x28, 0x004a, 140 }, { 0x2a, 0x804a, 146 },
272 { 0x2c, 0x004b, 152 }, { 0x2e, 0x804b, 159 }, { 0x30, 0x004c, 166 },
273 { 0x32, 0x804c, 173 }, { 0x34, 0x004d, 181 }, { 0x36, 0x804d, 189 },
274 { 0x38, 0x004e, 198 }, { 0x3a, 0x804e, 206 }, { 0x3c, 0x004f, 215 },
275 { 0x3e, 0x804f, 225 }, { 0x40, 0x0050, 230 }, { 0x42, 0x8050, 235 },
276 { 0x44, 0x0051, 240 }, { 0x46, 0x8051, 245 }, { 0x48, 0x0052, 251 },
277 { 0x4a, 0x8052, 256 }, { 0x4c, 0x0053, 262 }, { 0x4e, 0x8053, 268 },
278 { 0x50, 0x0054, 273 }, { 0x52, 0x8054, 279 }, { 0x54, 0x0055, 286 },
279 { 0x56, 0x8055, 292 }, { 0x58, 0x0056, 298 }, { 0x5a, 0x8056, 305 },
280 { 0x5c, 0x0057, 311 }, { 0x5e, 0x8057, 318 }, { 0x60, 0x0058, 325 },
281 { 0x62, 0x8058, 332 }, { 0x64, 0x0059, 340 }, { 0x66, 0x8059, 347 },
282 { 0x68, 0x005a, 355 }, { 0x6a, 0x805a, 362 }, { 0x6c, 0x005b, 370 },
283 { 0x6e, 0x805b, 378 }, { 0x70, 0x005c, 387 }, { 0x72, 0x805c, 395 },
284 { 0x74, 0x005d, 404 }, { 0x76, 0x805d, 413 }, { 0x78, 0x005e, 422 },
285 { 0x7a, 0x805e, 431 }, { 0x7c, 0x005f, 440 }, { 0x7e, 0x805f, 450 },
286 { 0x80, 0x0060, 460 }, { 0x82, 0x8060, 470 }, { 0x84, 0x0061, 480 },
287 { 0x86, 0x8061, 491 }, { 0x88, 0x0062, 501 }, { 0x8a, 0x8062, 512 },
288 { 0x8c, 0x0063, 524 }, { 0x8e, 0x8063, 535 }, { 0x90, 0x0064, 547 },
289 { 0x92, 0x8064, 559 }, { 0x94, 0x0065, 571 }, { 0x96, 0x8065, 584 },
290 { 0x98, 0x0066, 596 }, { 0x9a, 0x8066, 609 }, { 0x9c, 0x0067, 623 },
291 { 0x9e, 0x8067, 636 }, { 0xa0, 0x0068, 650 }, { 0xa2, 0x8068, 665 },
292 { 0xa4, 0x0069, 679 }, { 0xa6, 0x8069, 694 }, { 0xa8, 0x006a, 709 },
293 { 0xaa, 0x806a, 725 }, { 0xac, 0x006b, 741 }, { 0xae, 0x806b, 757 },
294 { 0xb0, 0x006c, 773 }, { 0xb2, 0x806c, 790 }, { 0xb4, 0x006d, 808 },
295 { 0xb6, 0x806d, 825 }, { 0xb8, 0x006e, 843 }, { 0xba, 0x806e, 862 },
296 { 0xbc, 0x006f, 881 }, { 0xbe, 0x806f, 900 }, { 0xc0, 0x0070, 920 },
297 { 0xc2, 0x8070, 940 }, { 0xc4, 0x0071, 960 }, { 0xc6, 0x8071, 981 },
298 { 0xc8, 0x0072, joycon_max_rumble_amp }
299};
300static const u16 JC_RUMBLE_DFLT_LOW_FREQ = 160;
301static const u16 JC_RUMBLE_DFLT_HIGH_FREQ = 320;
302static const unsigned short JC_RUMBLE_ZERO_AMP_PKT_CNT = 5;
303#endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */
304static const u16 JC_RUMBLE_PERIOD_MS = 50;
305
306/* States for controller state machine */
307enum joycon_ctlr_state {
308 JOYCON_CTLR_STATE_INIT,
309 JOYCON_CTLR_STATE_READ,
310 JOYCON_CTLR_STATE_REMOVED,
311};
312
313/* Controller type received as part of device info */
314enum joycon_ctlr_type {
315 JOYCON_CTLR_TYPE_JCL = 0x01,
316 JOYCON_CTLR_TYPE_JCR = 0x02,
317 JOYCON_CTLR_TYPE_PRO = 0x03,
318 JOYCON_CTLR_TYPE_NESL = 0x09,
319 JOYCON_CTLR_TYPE_NESR = 0x0A,
320 JOYCON_CTLR_TYPE_SNES = 0x0B,
321 JOYCON_CTLR_TYPE_GEN = 0x0D,
322 JOYCON_CTLR_TYPE_N64 = 0x0C,
323};
324
325struct joycon_stick_cal {
326 s32 max;
327 s32 min;
328 s32 center;
329};
330
331struct joycon_imu_cal {
332 s16 offset[3];
333 s16 scale[3];
334};
335
336/*
337 * All the controller's button values are stored in a u32.
338 * They can be accessed with bitwise ANDs.
339 */
340#define JC_BTN_Y BIT(0)
341#define JC_BTN_X BIT(1)
342#define JC_BTN_B BIT(2)
343#define JC_BTN_A BIT(3)
344#define JC_BTN_SR_R BIT(4)
345#define JC_BTN_SL_R BIT(5)
346#define JC_BTN_R BIT(6)
347#define JC_BTN_ZR BIT(7)
348#define JC_BTN_MINUS BIT(8)
349#define JC_BTN_PLUS BIT(9)
350#define JC_BTN_RSTICK BIT(10)
351#define JC_BTN_LSTICK BIT(11)
352#define JC_BTN_HOME BIT(12)
353#define JC_BTN_CAP BIT(13) /* capture button */
354#define JC_BTN_DOWN BIT(16)
355#define JC_BTN_UP BIT(17)
356#define JC_BTN_RIGHT BIT(18)
357#define JC_BTN_LEFT BIT(19)
358#define JC_BTN_SR_L BIT(20)
359#define JC_BTN_SL_L BIT(21)
360#define JC_BTN_L BIT(22)
361#define JC_BTN_ZL BIT(23)
362
363struct joycon_ctlr_button_mapping {
364 u32 code;
365 u32 bit;
366};
367
368/*
369 * D-pad is configured as buttons for the left Joy-Con only!
370 */
371static const struct joycon_ctlr_button_mapping left_joycon_button_mappings[] = {
372 { BTN_TL, JC_BTN_L, },
373 { BTN_TL2, JC_BTN_ZL, },
374 { BTN_SELECT, JC_BTN_MINUS, },
375 { BTN_THUMBL, JC_BTN_LSTICK, },
376 { BTN_DPAD_UP, JC_BTN_UP, },
377 { BTN_DPAD_DOWN, JC_BTN_DOWN, },
378 { BTN_DPAD_LEFT, JC_BTN_LEFT, },
379 { BTN_DPAD_RIGHT, JC_BTN_RIGHT, },
380 { BTN_Z, JC_BTN_CAP, },
381 { /* sentinel */ },
382};
383
384/*
385 * The unused *right*-side triggers become the SL/SR triggers for the *left*
386 * Joy-Con, if and only if we're not using a charging grip.
387 */
388static const struct joycon_ctlr_button_mapping left_joycon_s_button_mappings[] = {
389 { BTN_TR, JC_BTN_SL_L, },
390 { BTN_TR2, JC_BTN_SR_L, },
391 { /* sentinel */ },
392};
393
394static const struct joycon_ctlr_button_mapping right_joycon_button_mappings[] = {
395 { BTN_EAST, JC_BTN_A, },
396 { BTN_SOUTH, JC_BTN_B, },
397 { BTN_NORTH, JC_BTN_X, },
398 { BTN_WEST, JC_BTN_Y, },
399 { BTN_TR, JC_BTN_R, },
400 { BTN_TR2, JC_BTN_ZR, },
401 { BTN_START, JC_BTN_PLUS, },
402 { BTN_THUMBR, JC_BTN_RSTICK, },
403 { BTN_MODE, JC_BTN_HOME, },
404 { /* sentinel */ },
405};
406
407/*
408 * The unused *left*-side triggers become the SL/SR triggers for the *right*
409 * Joy-Con, if and only if we're not using a charging grip.
410 */
411static const struct joycon_ctlr_button_mapping right_joycon_s_button_mappings[] = {
412 { BTN_TL, JC_BTN_SL_R, },
413 { BTN_TL2, JC_BTN_SR_R, },
414 { /* sentinel */ },
415};
416
417static const struct joycon_ctlr_button_mapping procon_button_mappings[] = {
418 { BTN_EAST, JC_BTN_A, },
419 { BTN_SOUTH, JC_BTN_B, },
420 { BTN_NORTH, JC_BTN_X, },
421 { BTN_WEST, JC_BTN_Y, },
422 { BTN_TL, JC_BTN_L, },
423 { BTN_TR, JC_BTN_R, },
424 { BTN_TL2, JC_BTN_ZL, },
425 { BTN_TR2, JC_BTN_ZR, },
426 { BTN_SELECT, JC_BTN_MINUS, },
427 { BTN_START, JC_BTN_PLUS, },
428 { BTN_THUMBL, JC_BTN_LSTICK, },
429 { BTN_THUMBR, JC_BTN_RSTICK, },
430 { BTN_MODE, JC_BTN_HOME, },
431 { BTN_Z, JC_BTN_CAP, },
432 { /* sentinel */ },
433};
434
435static const struct joycon_ctlr_button_mapping nescon_button_mappings[] = {
436 { BTN_SOUTH, JC_BTN_A, },
437 { BTN_EAST, JC_BTN_B, },
438 { BTN_TL, JC_BTN_L, },
439 { BTN_TR, JC_BTN_R, },
440 { BTN_SELECT, JC_BTN_MINUS, },
441 { BTN_START, JC_BTN_PLUS, },
442 { /* sentinel */ },
443};
444
445static const struct joycon_ctlr_button_mapping snescon_button_mappings[] = {
446 { BTN_EAST, JC_BTN_A, },
447 { BTN_SOUTH, JC_BTN_B, },
448 { BTN_NORTH, JC_BTN_X, },
449 { BTN_WEST, JC_BTN_Y, },
450 { BTN_TL, JC_BTN_L, },
451 { BTN_TR, JC_BTN_R, },
452 { BTN_TL2, JC_BTN_ZL, },
453 { BTN_TR2, JC_BTN_ZR, },
454 { BTN_SELECT, JC_BTN_MINUS, },
455 { BTN_START, JC_BTN_PLUS, },
456 { /* sentinel */ },
457};
458
459static const struct joycon_ctlr_button_mapping gencon_button_mappings[] = {
460 { BTN_WEST, JC_BTN_A, }, /* A */
461 { BTN_SOUTH, JC_BTN_B, }, /* B */
462 { BTN_EAST, JC_BTN_R, }, /* C */
463 { BTN_TL, JC_BTN_X, }, /* X MD/GEN 6B Only */
464 { BTN_NORTH, JC_BTN_Y, }, /* Y MD/GEN 6B Only */
465 { BTN_TR, JC_BTN_L, }, /* Z MD/GEN 6B Only */
466 { BTN_SELECT, JC_BTN_ZR, }, /* Mode */
467 { BTN_START, JC_BTN_PLUS, },
468 { BTN_MODE, JC_BTN_HOME, },
469 { BTN_Z, JC_BTN_CAP, },
470 { /* sentinel */ },
471};
472
473static const struct joycon_ctlr_button_mapping n64con_button_mappings[] = {
474 { BTN_A, JC_BTN_A, },
475 { BTN_B, JC_BTN_B, },
476 { BTN_TL2, JC_BTN_ZL, }, /* Z */
477 { BTN_TL, JC_BTN_L, },
478 { BTN_TR, JC_BTN_R, },
479 { BTN_TR2, JC_BTN_LSTICK, }, /* ZR */
480 { BTN_START, JC_BTN_PLUS, },
481 { BTN_SELECT, JC_BTN_Y, }, /* C UP */
482 { BTN_X, JC_BTN_ZR, }, /* C DOWN */
483 { BTN_Y, JC_BTN_X, }, /* C LEFT */
484 { BTN_C, JC_BTN_MINUS, }, /* C RIGHT */
485 { BTN_MODE, JC_BTN_HOME, },
486 { BTN_Z, JC_BTN_CAP, },
487 { /* sentinel */ },
488};
489
490enum joycon_msg_type {
491 JOYCON_MSG_TYPE_NONE,
492 JOYCON_MSG_TYPE_USB,
493 JOYCON_MSG_TYPE_SUBCMD,
494};
495
496struct joycon_rumble_output {
497 u8 output_id;
498 u8 packet_num;
499 u8 rumble_data[8];
500} __packed;
501
502struct joycon_subcmd_request {
503 u8 output_id; /* must be 0x01 for subcommand, 0x10 for rumble only */
504 u8 packet_num; /* incremented every send */
505 u8 rumble_data[8];
506 u8 subcmd_id;
507 u8 data[]; /* length depends on the subcommand */
508} __packed;
509
510struct joycon_subcmd_reply {
511 u8 ack; /* MSB 1 for ACK, 0 for NACK */
512 u8 id; /* id of requested subcmd */
513 u8 data[]; /* will be at most 35 bytes */
514} __packed;
515
516struct joycon_imu_data {
517 s16 accel_x;
518 s16 accel_y;
519 s16 accel_z;
520 s16 gyro_x;
521 s16 gyro_y;
522 s16 gyro_z;
523} __packed;
524
525struct joycon_input_report {
526 u8 id;
527 u8 timer;
528 u8 bat_con; /* battery and connection info */
529 u8 button_status[3];
530 u8 left_stick[3];
531 u8 right_stick[3];
532 u8 vibrator_report;
533
534 union {
535 struct joycon_subcmd_reply subcmd_reply;
536 /* IMU input reports contain 3 samples */
537 u8 imu_raw_bytes[sizeof(struct joycon_imu_data) * 3];
538 };
539} __packed;
540
541#define JC_MAX_RESP_SIZE (sizeof(struct joycon_input_report) + 35)
542#define JC_RUMBLE_DATA_SIZE 8
543#define JC_RUMBLE_QUEUE_SIZE 8
544
545static const char * const joycon_player_led_names[] = {
546 LED_FUNCTION_PLAYER1,
547 LED_FUNCTION_PLAYER2,
548 LED_FUNCTION_PLAYER3,
549 LED_FUNCTION_PLAYER4,
550};
551#define JC_NUM_LEDS ARRAY_SIZE(joycon_player_led_names)
552#define JC_NUM_LED_PATTERNS 8
553/* Taken from https://www.nintendo.com/my/support/qa/detail/33822 */
554static const enum led_brightness joycon_player_led_patterns[JC_NUM_LED_PATTERNS][JC_NUM_LEDS] = {
555 { 1, 0, 0, 0 },
556 { 1, 1, 0, 0 },
557 { 1, 1, 1, 0 },
558 { 1, 1, 1, 1 },
559 { 1, 0, 0, 1 },
560 { 1, 0, 1, 0 },
561 { 1, 0, 1, 1 },
562 { 0, 1, 1, 0 },
563};
564
565/* Each physical controller is associated with a joycon_ctlr struct */
566struct joycon_ctlr {
567 struct hid_device *hdev;
568 struct input_dev *input;
569 u32 player_id;
570 struct led_classdev leds[JC_NUM_LEDS]; /* player leds */
571 struct led_classdev home_led;
572 enum joycon_ctlr_state ctlr_state;
573 spinlock_t lock;
574 u8 mac_addr[6];
575 char *mac_addr_str;
576 enum joycon_ctlr_type ctlr_type;
577
578 /* The following members are used for synchronous sends/receives */
579 enum joycon_msg_type msg_type;
580 u8 subcmd_num;
581 struct mutex output_mutex;
582 u8 input_buf[JC_MAX_RESP_SIZE];
583 wait_queue_head_t wait;
584 bool received_resp;
585 u8 usb_ack_match;
586 u8 subcmd_ack_match;
587 bool received_input_report;
588 unsigned int last_input_report_msecs;
589 unsigned int last_subcmd_sent_msecs;
590 unsigned int consecutive_valid_report_deltas;
591
592 /* factory calibration data */
593 struct joycon_stick_cal left_stick_cal_x;
594 struct joycon_stick_cal left_stick_cal_y;
595 struct joycon_stick_cal right_stick_cal_x;
596 struct joycon_stick_cal right_stick_cal_y;
597
598 struct joycon_imu_cal accel_cal;
599 struct joycon_imu_cal gyro_cal;
600
601 /* prevents needlessly recalculating these divisors every sample */
602 s32 imu_cal_accel_divisor[3];
603 s32 imu_cal_gyro_divisor[3];
604
605 /* power supply data */
606 struct power_supply *battery;
607 struct power_supply_desc battery_desc;
608 u8 battery_capacity;
609 bool battery_charging;
610 bool host_powered;
611
612 /* rumble */
613 u8 rumble_data[JC_RUMBLE_QUEUE_SIZE][JC_RUMBLE_DATA_SIZE];
614 int rumble_queue_head;
615 int rumble_queue_tail;
616 struct workqueue_struct *rumble_queue;
617 struct work_struct rumble_worker;
618 unsigned int rumble_msecs;
619 u16 rumble_ll_freq;
620 u16 rumble_lh_freq;
621 u16 rumble_rl_freq;
622 u16 rumble_rh_freq;
623 unsigned short rumble_zero_countdown;
624
625 /* imu */
626 struct input_dev *imu_input;
627 bool imu_first_packet_received; /* helps in initiating timestamp */
628 unsigned int imu_timestamp_us; /* timestamp we report to userspace */
629 unsigned int imu_last_pkt_ms; /* used to calc imu report delta */
630 /* the following are used to track the average imu report time delta */
631 unsigned int imu_delta_samples_count;
632 unsigned int imu_delta_samples_sum;
633 unsigned int imu_avg_delta_ms;
634};
635
636/* Helper macros for checking controller type */
637#define jc_type_is_joycon(ctlr) \
638 (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONL || \
639 ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_JOYCONR || \
640 ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP)
641#define jc_type_is_procon(ctlr) \
642 (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_PROCON)
643#define jc_type_is_chrggrip(ctlr) \
644 (ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP)
645
646/* Does this controller have inputs associated with left joycon? */
647#define jc_type_has_left(ctlr) \
648 (ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCL || \
649 ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO || \
650 ctlr->ctlr_type == JOYCON_CTLR_TYPE_N64)
651
652/* Does this controller have inputs associated with right joycon? */
653#define jc_type_has_right(ctlr) \
654 (ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCR || \
655 ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO)
656
657/*
658 * Controller device helpers
659 *
660 * These look at the device ID known to the HID subsystem to identify a device,
661 * but take caution: some NSO devices lie about themselves (NES Joy-Cons and
662 * Sega Genesis controller). See type helpers below.
663 *
664 * These helpers are most useful early during the HID probe or in conjunction
665 * with the capability helpers below.
666 */
667static inline bool joycon_device_is_chrggrip(struct joycon_ctlr *ctlr)
668{
669 return ctlr->hdev->product == USB_DEVICE_ID_NINTENDO_CHRGGRIP;
670}
671
672/*
673 * Controller type helpers
674 *
675 * These are slightly different than the device-ID-based helpers above. They are
676 * generally more reliable, since they can distinguish between, e.g., Genesis
677 * versus SNES, or NES Joy-Cons versus regular Switch Joy-Cons. They're most
678 * useful for reporting available inputs. For other kinds of distinctions, see
679 * the capability helpers below.
680 *
681 * They have two major drawbacks: (1) they're not available until after we set
682 * the reporting method and then request the device info; (2) they can't
683 * distinguish all controllers (like the Charging Grip from the Pro controller.)
684 */
685static inline bool joycon_type_is_left_joycon(struct joycon_ctlr *ctlr)
686{
687 return ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCL;
688}
689
690static inline bool joycon_type_is_right_joycon(struct joycon_ctlr *ctlr)
691{
692 return ctlr->ctlr_type == JOYCON_CTLR_TYPE_JCR;
693}
694
695static inline bool joycon_type_is_procon(struct joycon_ctlr *ctlr)
696{
697 return ctlr->ctlr_type == JOYCON_CTLR_TYPE_PRO;
698}
699
700static inline bool joycon_type_is_snescon(struct joycon_ctlr *ctlr)
701{
702 return ctlr->ctlr_type == JOYCON_CTLR_TYPE_SNES;
703}
704
705static inline bool joycon_type_is_gencon(struct joycon_ctlr *ctlr)
706{
707 return ctlr->ctlr_type == JOYCON_CTLR_TYPE_GEN;
708}
709
710static inline bool joycon_type_is_n64con(struct joycon_ctlr *ctlr)
711{
712 return ctlr->ctlr_type == JOYCON_CTLR_TYPE_N64;
713}
714
715static inline bool joycon_type_is_left_nescon(struct joycon_ctlr *ctlr)
716{
717 return ctlr->ctlr_type == JOYCON_CTLR_TYPE_NESL;
718}
719
720static inline bool joycon_type_is_right_nescon(struct joycon_ctlr *ctlr)
721{
722 return ctlr->ctlr_type == JOYCON_CTLR_TYPE_NESR;
723}
724
725static inline bool joycon_type_is_any_joycon(struct joycon_ctlr *ctlr)
726{
727 return joycon_type_is_left_joycon(ctlr) ||
728 joycon_type_is_right_joycon(ctlr) ||
729 joycon_device_is_chrggrip(ctlr);
730}
731
732static inline bool joycon_type_is_any_nescon(struct joycon_ctlr *ctlr)
733{
734 return joycon_type_is_left_nescon(ctlr) ||
735 joycon_type_is_right_nescon(ctlr);
736}
737
738/*
739 * Controller capability helpers
740 *
741 * These helpers combine the use of the helpers above to detect certain
742 * capabilities during initialization. They are always accurate but (since they
743 * use type helpers) cannot be used early in the HID probe.
744 */
745static inline bool joycon_has_imu(struct joycon_ctlr *ctlr)
746{
747 return joycon_device_is_chrggrip(ctlr) ||
748 joycon_type_is_any_joycon(ctlr) ||
749 joycon_type_is_procon(ctlr);
750}
751
752static inline bool joycon_has_joysticks(struct joycon_ctlr *ctlr)
753{
754 return joycon_device_is_chrggrip(ctlr) ||
755 joycon_type_is_any_joycon(ctlr) ||
756 joycon_type_is_procon(ctlr) ||
757 joycon_type_is_n64con(ctlr);
758}
759
760static inline bool joycon_has_rumble(struct joycon_ctlr *ctlr)
761{
762 return joycon_device_is_chrggrip(ctlr) ||
763 joycon_type_is_any_joycon(ctlr) ||
764 joycon_type_is_procon(ctlr) ||
765 joycon_type_is_n64con(ctlr);
766}
767
768static inline bool joycon_using_usb(struct joycon_ctlr *ctlr)
769{
770 return ctlr->hdev->bus == BUS_USB;
771}
772
773static int __joycon_hid_send(struct hid_device *hdev, u8 *data, size_t len)
774{
775 u8 *buf;
776 int ret;
777
778 buf = kmemdup(data, len, GFP_KERNEL);
779 if (!buf)
780 return -ENOMEM;
781 ret = hid_hw_output_report(hdev, buf, len);
782 kfree(objp: buf);
783 if (ret < 0)
784 hid_dbg(hdev, "Failed to send output report ret=%d\n", ret);
785 return ret;
786}
787
788static void joycon_wait_for_input_report(struct joycon_ctlr *ctlr)
789{
790 int ret;
791
792 /*
793 * If we are in the proper reporting mode, wait for an input
794 * report prior to sending the subcommand. This improves
795 * reliability considerably.
796 */
797 if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ) {
798 unsigned long flags;
799
800 spin_lock_irqsave(&ctlr->lock, flags);
801 ctlr->received_input_report = false;
802 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
803 ret = wait_event_timeout(ctlr->wait,
804 ctlr->received_input_report,
805 HZ / 4);
806 /* We will still proceed, even with a timeout here */
807 if (!ret)
808 hid_warn(ctlr->hdev,
809 "timeout waiting for input report\n");
810 }
811}
812
813/*
814 * Sending subcommands and/or rumble data at too high a rate can cause bluetooth
815 * controller disconnections.
816 */
817#define JC_INPUT_REPORT_MIN_DELTA 8
818#define JC_INPUT_REPORT_MAX_DELTA 17
819#define JC_SUBCMD_TX_OFFSET_MS 4
820#define JC_SUBCMD_VALID_DELTA_REQ 3
821#define JC_SUBCMD_RATE_MAX_ATTEMPTS 500
822#define JC_SUBCMD_RATE_LIMITER_USB_MS 20
823#define JC_SUBCMD_RATE_LIMITER_BT_MS 60
824#define JC_SUBCMD_RATE_LIMITER_MS(ctlr) ((ctlr)->hdev->bus == BUS_USB ? JC_SUBCMD_RATE_LIMITER_USB_MS : JC_SUBCMD_RATE_LIMITER_BT_MS)
825static void joycon_enforce_subcmd_rate(struct joycon_ctlr *ctlr)
826{
827 unsigned int current_ms;
828 unsigned long subcmd_delta;
829 int consecutive_valid_deltas = 0;
830 int attempts = 0;
831 unsigned long flags;
832
833 if (unlikely(ctlr->ctlr_state != JOYCON_CTLR_STATE_READ))
834 return;
835
836 do {
837 joycon_wait_for_input_report(ctlr);
838 current_ms = jiffies_to_msecs(j: jiffies);
839 subcmd_delta = current_ms - ctlr->last_subcmd_sent_msecs;
840
841 spin_lock_irqsave(&ctlr->lock, flags);
842 consecutive_valid_deltas = ctlr->consecutive_valid_report_deltas;
843 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
844
845 attempts++;
846 } while ((consecutive_valid_deltas < JC_SUBCMD_VALID_DELTA_REQ ||
847 subcmd_delta < JC_SUBCMD_RATE_LIMITER_MS(ctlr)) &&
848 ctlr->ctlr_state == JOYCON_CTLR_STATE_READ &&
849 attempts < JC_SUBCMD_RATE_MAX_ATTEMPTS);
850
851 if (attempts >= JC_SUBCMD_RATE_MAX_ATTEMPTS) {
852 hid_warn(ctlr->hdev, "%s: exceeded max attempts", __func__);
853 return;
854 }
855
856 ctlr->last_subcmd_sent_msecs = current_ms;
857
858 /*
859 * Wait a short time after receiving an input report before
860 * transmitting. This should reduce odds of a TX coinciding with an RX.
861 * Minimizing concurrent BT traffic with the controller seems to lower
862 * the rate of disconnections.
863 */
864 msleep(JC_SUBCMD_TX_OFFSET_MS);
865}
866
867static int joycon_hid_send_sync(struct joycon_ctlr *ctlr, u8 *data, size_t len,
868 u32 timeout)
869{
870 int ret;
871 int tries = 2;
872
873 /*
874 * The controller occasionally seems to drop subcommands. In testing,
875 * doing one retry after a timeout appears to always work.
876 */
877 while (tries--) {
878 joycon_enforce_subcmd_rate(ctlr);
879
880 ret = __joycon_hid_send(hdev: ctlr->hdev, data, len);
881 if (ret < 0) {
882 memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
883 return ret;
884 }
885
886 ret = wait_event_timeout(ctlr->wait, ctlr->received_resp,
887 timeout);
888 if (!ret) {
889 hid_dbg(ctlr->hdev,
890 "synchronous send/receive timed out\n");
891 if (tries) {
892 hid_dbg(ctlr->hdev,
893 "retrying sync send after timeout\n");
894 }
895 memset(ctlr->input_buf, 0, JC_MAX_RESP_SIZE);
896 ret = -ETIMEDOUT;
897 } else {
898 ret = 0;
899 break;
900 }
901 }
902
903 ctlr->received_resp = false;
904 return ret;
905}
906
907static int joycon_send_usb(struct joycon_ctlr *ctlr, u8 cmd, u32 timeout)
908{
909 int ret;
910 u8 buf[2] = {JC_OUTPUT_USB_CMD};
911
912 buf[1] = cmd;
913 ctlr->usb_ack_match = cmd;
914 ctlr->msg_type = JOYCON_MSG_TYPE_USB;
915 ret = joycon_hid_send_sync(ctlr, data: buf, len: sizeof(buf), timeout);
916 if (ret)
917 hid_dbg(ctlr->hdev, "send usb command failed; ret=%d\n", ret);
918 return ret;
919}
920
921static int joycon_send_subcmd(struct joycon_ctlr *ctlr,
922 struct joycon_subcmd_request *subcmd,
923 size_t data_len, u32 timeout)
924{
925 int ret;
926 unsigned long flags;
927
928 spin_lock_irqsave(&ctlr->lock, flags);
929 /*
930 * If the controller has been removed, just return ENODEV so the LED
931 * subsystem doesn't print invalid errors on removal.
932 */
933 if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) {
934 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
935 return -ENODEV;
936 }
937 memcpy(subcmd->rumble_data, ctlr->rumble_data[ctlr->rumble_queue_tail],
938 JC_RUMBLE_DATA_SIZE);
939 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
940
941 subcmd->output_id = JC_OUTPUT_RUMBLE_AND_SUBCMD;
942 subcmd->packet_num = ctlr->subcmd_num;
943 if (++ctlr->subcmd_num > 0xF)
944 ctlr->subcmd_num = 0;
945 ctlr->subcmd_ack_match = subcmd->subcmd_id;
946 ctlr->msg_type = JOYCON_MSG_TYPE_SUBCMD;
947
948 ret = joycon_hid_send_sync(ctlr, data: (u8 *)subcmd,
949 len: sizeof(*subcmd) + data_len, timeout);
950 if (ret < 0)
951 hid_dbg(ctlr->hdev, "send subcommand failed; ret=%d\n", ret);
952 else
953 ret = 0;
954 return ret;
955}
956
957/* Supply nibbles for flash and on. Ones correspond to active */
958static int joycon_set_player_leds(struct joycon_ctlr *ctlr, u8 flash, u8 on)
959{
960 struct joycon_subcmd_request *req;
961 u8 buffer[sizeof(*req) + 1] = { 0 };
962
963 req = (struct joycon_subcmd_request *)buffer;
964 req->subcmd_id = JC_SUBCMD_SET_PLAYER_LIGHTS;
965 req->data[0] = (flash << 4) | on;
966
967 hid_dbg(ctlr->hdev, "setting player leds\n");
968 return joycon_send_subcmd(ctlr, subcmd: req, data_len: 1, HZ/4);
969}
970
971static int joycon_set_home_led(struct joycon_ctlr *ctlr, enum led_brightness brightness)
972{
973 struct joycon_subcmd_request *req;
974 u8 buffer[sizeof(*req) + 5] = { 0 };
975 u8 *data;
976
977 req = (struct joycon_subcmd_request *)buffer;
978 req->subcmd_id = JC_SUBCMD_SET_HOME_LIGHT;
979 data = req->data;
980 data[0] = 0x01;
981 data[1] = brightness << 4;
982 data[2] = brightness | (brightness << 4);
983 data[3] = 0x11;
984 data[4] = 0x11;
985
986 hid_dbg(ctlr->hdev, "setting home led brightness\n");
987 return joycon_send_subcmd(ctlr, subcmd: req, data_len: 5, HZ/4);
988}
989
990static int joycon_request_spi_flash_read(struct joycon_ctlr *ctlr,
991 u32 start_addr, u8 size, u8 **reply)
992{
993 struct joycon_subcmd_request *req;
994 struct joycon_input_report *report;
995 u8 buffer[sizeof(*req) + 5] = { 0 };
996 u8 *data;
997 int ret;
998
999 if (!reply)
1000 return -EINVAL;
1001
1002 req = (struct joycon_subcmd_request *)buffer;
1003 req->subcmd_id = JC_SUBCMD_SPI_FLASH_READ;
1004 data = req->data;
1005 put_unaligned_le32(val: start_addr, p: data);
1006 data[4] = size;
1007
1008 hid_dbg(ctlr->hdev, "requesting SPI flash data\n");
1009 ret = joycon_send_subcmd(ctlr, subcmd: req, data_len: 5, HZ);
1010 if (ret) {
1011 hid_err(ctlr->hdev, "failed reading SPI flash; ret=%d\n", ret);
1012 } else {
1013 report = (struct joycon_input_report *)ctlr->input_buf;
1014 /* The read data starts at the 6th byte */
1015 *reply = &report->subcmd_reply.data[5];
1016 }
1017 return ret;
1018}
1019
1020/*
1021 * User calibration's presence is denoted with a magic byte preceding it.
1022 * returns 0 if magic val is present, 1 if not present, < 0 on error
1023 */
1024static int joycon_check_for_cal_magic(struct joycon_ctlr *ctlr, u32 flash_addr)
1025{
1026 int ret;
1027 u8 *reply;
1028
1029 ret = joycon_request_spi_flash_read(ctlr, start_addr: flash_addr,
1030 JC_CAL_USR_MAGIC_SIZE, reply: &reply);
1031 if (ret)
1032 return ret;
1033
1034 return reply[0] != JC_CAL_USR_MAGIC_0 || reply[1] != JC_CAL_USR_MAGIC_1;
1035}
1036
1037static int joycon_read_stick_calibration(struct joycon_ctlr *ctlr, u16 cal_addr,
1038 struct joycon_stick_cal *cal_x,
1039 struct joycon_stick_cal *cal_y,
1040 bool left_stick)
1041{
1042 s32 x_max_above;
1043 s32 x_min_below;
1044 s32 y_max_above;
1045 s32 y_min_below;
1046 u8 *raw_cal;
1047 int ret;
1048
1049 ret = joycon_request_spi_flash_read(ctlr, start_addr: cal_addr,
1050 JC_CAL_STICK_DATA_SIZE, reply: &raw_cal);
1051 if (ret)
1052 return ret;
1053
1054 /* stick calibration parsing: note the order differs based on stick */
1055 if (left_stick) {
1056 x_max_above = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 0), offset: 0,
1057 n: 12);
1058 y_max_above = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 1), offset: 4,
1059 n: 12);
1060 cal_x->center = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 3), offset: 0,
1061 n: 12);
1062 cal_y->center = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 4), offset: 4,
1063 n: 12);
1064 x_min_below = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 6), offset: 0,
1065 n: 12);
1066 y_min_below = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 7), offset: 4,
1067 n: 12);
1068 } else {
1069 cal_x->center = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 0), offset: 0,
1070 n: 12);
1071 cal_y->center = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 1), offset: 4,
1072 n: 12);
1073 x_min_below = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 3), offset: 0,
1074 n: 12);
1075 y_min_below = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 4), offset: 4,
1076 n: 12);
1077 x_max_above = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 6), offset: 0,
1078 n: 12);
1079 y_max_above = hid_field_extract(hid: ctlr->hdev, report: (raw_cal + 7), offset: 4,
1080 n: 12);
1081 }
1082
1083 cal_x->max = cal_x->center + x_max_above;
1084 cal_x->min = cal_x->center - x_min_below;
1085 cal_y->max = cal_y->center + y_max_above;
1086 cal_y->min = cal_y->center - y_min_below;
1087
1088 /* check if calibration values are plausible */
1089 if (cal_x->min >= cal_x->center || cal_x->center >= cal_x->max ||
1090 cal_y->min >= cal_y->center || cal_y->center >= cal_y->max)
1091 ret = -EINVAL;
1092
1093 return ret;
1094}
1095
1096static const u16 DFLT_STICK_CAL_CEN = 2000;
1097static const u16 DFLT_STICK_CAL_MAX = 3500;
1098static const u16 DFLT_STICK_CAL_MIN = 500;
1099static void joycon_use_default_calibration(struct hid_device *hdev,
1100 struct joycon_stick_cal *cal_x,
1101 struct joycon_stick_cal *cal_y,
1102 const char *stick, int ret)
1103{
1104 hid_warn(hdev,
1105 "Failed to read %s stick cal, using defaults; e=%d\n",
1106 stick, ret);
1107
1108 cal_x->center = cal_y->center = DFLT_STICK_CAL_CEN;
1109 cal_x->max = cal_y->max = DFLT_STICK_CAL_MAX;
1110 cal_x->min = cal_y->min = DFLT_STICK_CAL_MIN;
1111}
1112
1113static int joycon_request_calibration(struct joycon_ctlr *ctlr)
1114{
1115 u16 left_stick_addr = JC_CAL_FCT_DATA_LEFT_ADDR;
1116 u16 right_stick_addr = JC_CAL_FCT_DATA_RIGHT_ADDR;
1117 int ret;
1118
1119 hid_dbg(ctlr->hdev, "requesting cal data\n");
1120
1121 /* check if user stick calibrations are present */
1122 if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_LEFT_MAGIC_ADDR)) {
1123 left_stick_addr = JC_CAL_USR_LEFT_DATA_ADDR;
1124 hid_info(ctlr->hdev, "using user cal for left stick\n");
1125 } else {
1126 hid_info(ctlr->hdev, "using factory cal for left stick\n");
1127 }
1128 if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_RIGHT_MAGIC_ADDR)) {
1129 right_stick_addr = JC_CAL_USR_RIGHT_DATA_ADDR;
1130 hid_info(ctlr->hdev, "using user cal for right stick\n");
1131 } else {
1132 hid_info(ctlr->hdev, "using factory cal for right stick\n");
1133 }
1134
1135 /* read the left stick calibration data */
1136 ret = joycon_read_stick_calibration(ctlr, cal_addr: left_stick_addr,
1137 cal_x: &ctlr->left_stick_cal_x,
1138 cal_y: &ctlr->left_stick_cal_y,
1139 left_stick: true);
1140
1141 if (ret)
1142 joycon_use_default_calibration(hdev: ctlr->hdev,
1143 cal_x: &ctlr->left_stick_cal_x,
1144 cal_y: &ctlr->left_stick_cal_y,
1145 stick: "left", ret);
1146
1147 /* read the right stick calibration data */
1148 ret = joycon_read_stick_calibration(ctlr, cal_addr: right_stick_addr,
1149 cal_x: &ctlr->right_stick_cal_x,
1150 cal_y: &ctlr->right_stick_cal_y,
1151 left_stick: false);
1152
1153 if (ret)
1154 joycon_use_default_calibration(hdev: ctlr->hdev,
1155 cal_x: &ctlr->right_stick_cal_x,
1156 cal_y: &ctlr->right_stick_cal_y,
1157 stick: "right", ret);
1158
1159 hid_dbg(ctlr->hdev, "calibration:\n"
1160 "l_x_c=%d l_x_max=%d l_x_min=%d\n"
1161 "l_y_c=%d l_y_max=%d l_y_min=%d\n"
1162 "r_x_c=%d r_x_max=%d r_x_min=%d\n"
1163 "r_y_c=%d r_y_max=%d r_y_min=%d\n",
1164 ctlr->left_stick_cal_x.center,
1165 ctlr->left_stick_cal_x.max,
1166 ctlr->left_stick_cal_x.min,
1167 ctlr->left_stick_cal_y.center,
1168 ctlr->left_stick_cal_y.max,
1169 ctlr->left_stick_cal_y.min,
1170 ctlr->right_stick_cal_x.center,
1171 ctlr->right_stick_cal_x.max,
1172 ctlr->right_stick_cal_x.min,
1173 ctlr->right_stick_cal_y.center,
1174 ctlr->right_stick_cal_y.max,
1175 ctlr->right_stick_cal_y.min);
1176
1177 return 0;
1178}
1179
1180/*
1181 * These divisors are calculated once rather than for each sample. They are only
1182 * dependent on the IMU calibration values. They are used when processing the
1183 * IMU input reports.
1184 */
1185static void joycon_calc_imu_cal_divisors(struct joycon_ctlr *ctlr)
1186{
1187 int i, divz = 0;
1188
1189 for (i = 0; i < 3; i++) {
1190 ctlr->imu_cal_accel_divisor[i] = ctlr->accel_cal.scale[i] -
1191 ctlr->accel_cal.offset[i];
1192 ctlr->imu_cal_gyro_divisor[i] = ctlr->gyro_cal.scale[i] -
1193 ctlr->gyro_cal.offset[i];
1194
1195 if (ctlr->imu_cal_accel_divisor[i] == 0) {
1196 ctlr->imu_cal_accel_divisor[i] = 1;
1197 divz++;
1198 }
1199
1200 if (ctlr->imu_cal_gyro_divisor[i] == 0) {
1201 ctlr->imu_cal_gyro_divisor[i] = 1;
1202 divz++;
1203 }
1204 }
1205
1206 if (divz)
1207 hid_warn(ctlr->hdev, "inaccurate IMU divisors (%d)\n", divz);
1208}
1209
1210static const s16 DFLT_ACCEL_OFFSET /*= 0*/;
1211static const s16 DFLT_ACCEL_SCALE = 16384;
1212static const s16 DFLT_GYRO_OFFSET /*= 0*/;
1213static const s16 DFLT_GYRO_SCALE = 13371;
1214static int joycon_request_imu_calibration(struct joycon_ctlr *ctlr)
1215{
1216 u16 imu_cal_addr = JC_IMU_CAL_FCT_DATA_ADDR;
1217 u8 *raw_cal;
1218 int ret;
1219 int i;
1220
1221 /* check if user calibration exists */
1222 if (!joycon_check_for_cal_magic(ctlr, JC_IMU_CAL_USR_MAGIC_ADDR)) {
1223 imu_cal_addr = JC_IMU_CAL_USR_DATA_ADDR;
1224 hid_info(ctlr->hdev, "using user cal for IMU\n");
1225 } else {
1226 hid_info(ctlr->hdev, "using factory cal for IMU\n");
1227 }
1228
1229 /* request IMU calibration data */
1230 hid_dbg(ctlr->hdev, "requesting IMU cal data\n");
1231 ret = joycon_request_spi_flash_read(ctlr, start_addr: imu_cal_addr,
1232 JC_IMU_CAL_DATA_SIZE, reply: &raw_cal);
1233 if (ret) {
1234 hid_warn(ctlr->hdev,
1235 "Failed to read IMU cal, using defaults; ret=%d\n",
1236 ret);
1237
1238 for (i = 0; i < 3; i++) {
1239 ctlr->accel_cal.offset[i] = DFLT_ACCEL_OFFSET;
1240 ctlr->accel_cal.scale[i] = DFLT_ACCEL_SCALE;
1241 ctlr->gyro_cal.offset[i] = DFLT_GYRO_OFFSET;
1242 ctlr->gyro_cal.scale[i] = DFLT_GYRO_SCALE;
1243 }
1244 joycon_calc_imu_cal_divisors(ctlr);
1245 return ret;
1246 }
1247
1248 /* IMU calibration parsing */
1249 for (i = 0; i < 3; i++) {
1250 int j = i * 2;
1251
1252 ctlr->accel_cal.offset[i] = get_unaligned_le16(p: raw_cal + j);
1253 ctlr->accel_cal.scale[i] = get_unaligned_le16(p: raw_cal + j + 6);
1254 ctlr->gyro_cal.offset[i] = get_unaligned_le16(p: raw_cal + j + 12);
1255 ctlr->gyro_cal.scale[i] = get_unaligned_le16(p: raw_cal + j + 18);
1256 }
1257
1258 joycon_calc_imu_cal_divisors(ctlr);
1259
1260 hid_dbg(ctlr->hdev, "IMU calibration:\n"
1261 "a_o[0]=%d a_o[1]=%d a_o[2]=%d\n"
1262 "a_s[0]=%d a_s[1]=%d a_s[2]=%d\n"
1263 "g_o[0]=%d g_o[1]=%d g_o[2]=%d\n"
1264 "g_s[0]=%d g_s[1]=%d g_s[2]=%d\n",
1265 ctlr->accel_cal.offset[0],
1266 ctlr->accel_cal.offset[1],
1267 ctlr->accel_cal.offset[2],
1268 ctlr->accel_cal.scale[0],
1269 ctlr->accel_cal.scale[1],
1270 ctlr->accel_cal.scale[2],
1271 ctlr->gyro_cal.offset[0],
1272 ctlr->gyro_cal.offset[1],
1273 ctlr->gyro_cal.offset[2],
1274 ctlr->gyro_cal.scale[0],
1275 ctlr->gyro_cal.scale[1],
1276 ctlr->gyro_cal.scale[2]);
1277
1278 return 0;
1279}
1280
1281static int joycon_set_report_mode(struct joycon_ctlr *ctlr)
1282{
1283 struct joycon_subcmd_request *req;
1284 u8 buffer[sizeof(*req) + 1] = { 0 };
1285
1286 req = (struct joycon_subcmd_request *)buffer;
1287 req->subcmd_id = JC_SUBCMD_SET_REPORT_MODE;
1288 req->data[0] = 0x30; /* standard, full report mode */
1289
1290 hid_dbg(ctlr->hdev, "setting controller report mode\n");
1291 return joycon_send_subcmd(ctlr, subcmd: req, data_len: 1, HZ);
1292}
1293
1294static int joycon_enable_rumble(struct joycon_ctlr *ctlr)
1295{
1296 struct joycon_subcmd_request *req;
1297 u8 buffer[sizeof(*req) + 1] = { 0 };
1298
1299 req = (struct joycon_subcmd_request *)buffer;
1300 req->subcmd_id = JC_SUBCMD_ENABLE_VIBRATION;
1301 req->data[0] = 0x01; /* note: 0x00 would disable */
1302
1303 hid_dbg(ctlr->hdev, "enabling rumble\n");
1304 return joycon_send_subcmd(ctlr, subcmd: req, data_len: 1, HZ/4);
1305}
1306
1307static int joycon_enable_imu(struct joycon_ctlr *ctlr)
1308{
1309 struct joycon_subcmd_request *req;
1310 u8 buffer[sizeof(*req) + 1] = { 0 };
1311
1312 req = (struct joycon_subcmd_request *)buffer;
1313 req->subcmd_id = JC_SUBCMD_ENABLE_IMU;
1314 req->data[0] = 0x01; /* note: 0x00 would disable */
1315
1316 hid_dbg(ctlr->hdev, "enabling IMU\n");
1317 return joycon_send_subcmd(ctlr, subcmd: req, data_len: 1, HZ);
1318}
1319
1320static s32 joycon_map_stick_val(struct joycon_stick_cal *cal, s32 val)
1321{
1322 s32 center = cal->center;
1323 s32 min = cal->min;
1324 s32 max = cal->max;
1325 s32 new_val;
1326
1327 if (val > center) {
1328 new_val = (val - center) * JC_MAX_STICK_MAG;
1329 new_val /= (max - center);
1330 } else {
1331 new_val = (center - val) * -JC_MAX_STICK_MAG;
1332 new_val /= (center - min);
1333 }
1334 new_val = clamp(new_val, (s32)-JC_MAX_STICK_MAG, (s32)JC_MAX_STICK_MAG);
1335 return new_val;
1336}
1337
1338static void joycon_input_report_parse_imu_data(struct joycon_ctlr *ctlr,
1339 struct joycon_input_report *rep,
1340 struct joycon_imu_data *imu_data)
1341{
1342 u8 *raw = rep->imu_raw_bytes;
1343 int i;
1344
1345 for (i = 0; i < 3; i++) {
1346 struct joycon_imu_data *data = &imu_data[i];
1347
1348 data->accel_x = get_unaligned_le16(p: raw + 0);
1349 data->accel_y = get_unaligned_le16(p: raw + 2);
1350 data->accel_z = get_unaligned_le16(p: raw + 4);
1351 data->gyro_x = get_unaligned_le16(p: raw + 6);
1352 data->gyro_y = get_unaligned_le16(p: raw + 8);
1353 data->gyro_z = get_unaligned_le16(p: raw + 10);
1354 /* point to next imu sample */
1355 raw += sizeof(struct joycon_imu_data);
1356 }
1357}
1358
1359static void joycon_parse_imu_report(struct joycon_ctlr *ctlr,
1360 struct joycon_input_report *rep)
1361{
1362 struct joycon_imu_data imu_data[3] = {0}; /* 3 reports per packet */
1363 struct input_dev *idev = ctlr->imu_input;
1364 unsigned int msecs = jiffies_to_msecs(j: jiffies);
1365 unsigned int last_msecs = ctlr->imu_last_pkt_ms;
1366 int i;
1367 int value[6];
1368
1369 joycon_input_report_parse_imu_data(ctlr, rep, imu_data);
1370
1371 /*
1372 * There are complexities surrounding how we determine the timestamps we
1373 * associate with the samples we pass to userspace. The IMU input
1374 * reports do not provide us with a good timestamp. There's a quickly
1375 * incrementing 8-bit counter per input report, but it is not very
1376 * useful for this purpose (it is not entirely clear what rate it
1377 * increments at or if it varies based on packet push rate - more on
1378 * the push rate below...).
1379 *
1380 * The reverse engineering work done on the joy-cons and pro controllers
1381 * by the community seems to indicate the following:
1382 * - The controller samples the IMU every 1.35ms. It then does some of
1383 * its own processing, probably averaging the samples out.
1384 * - Each imu input report contains 3 IMU samples, (usually 5ms apart).
1385 * - In the standard reporting mode (which this driver uses exclusively)
1386 * input reports are pushed from the controller as follows:
1387 * * joy-con (bluetooth): every 15 ms
1388 * * joy-cons (in charging grip via USB): every 15 ms
1389 * * pro controller (USB): every 15 ms
1390 * * pro controller (bluetooth): every 8 ms (this is the wildcard)
1391 *
1392 * Further complicating matters is that some bluetooth stacks are known
1393 * to alter the controller's packet rate by hardcoding the bluetooth
1394 * SSR for the switch controllers (android's stack currently sets the
1395 * SSR to 11ms for both the joy-cons and pro controllers).
1396 *
1397 * In my own testing, I've discovered that my pro controller either
1398 * reports IMU sample batches every 11ms or every 15ms. This rate is
1399 * stable after connecting. It isn't 100% clear what determines this
1400 * rate. Importantly, even when sending every 11ms, none of the samples
1401 * are duplicates. This seems to indicate that the time deltas between
1402 * reported samples can vary based on the input report rate.
1403 *
1404 * The solution employed in this driver is to keep track of the average
1405 * time delta between IMU input reports. In testing, this value has
1406 * proven to be stable, staying at 15ms or 11ms, though other hardware
1407 * configurations and bluetooth stacks could potentially see other rates
1408 * (hopefully this will become more clear as more people use the
1409 * driver).
1410 *
1411 * Keeping track of the average report delta allows us to submit our
1412 * timestamps to userspace based on that. Each report contains 3
1413 * samples, so the IMU sampling rate should be avg_time_delta/3. We can
1414 * also use this average to detect events where we have dropped a
1415 * packet. The userspace timestamp for the samples will be adjusted
1416 * accordingly to prevent unwanted behvaior.
1417 */
1418 if (!ctlr->imu_first_packet_received) {
1419 ctlr->imu_timestamp_us = 0;
1420 ctlr->imu_delta_samples_count = 0;
1421 ctlr->imu_delta_samples_sum = 0;
1422 ctlr->imu_avg_delta_ms = JC_IMU_DFLT_AVG_DELTA_MS;
1423 ctlr->imu_first_packet_received = true;
1424 } else {
1425 unsigned int delta = msecs - last_msecs;
1426 unsigned int dropped_pkts;
1427 unsigned int dropped_threshold;
1428
1429 /* avg imu report delta housekeeping */
1430 ctlr->imu_delta_samples_sum += delta;
1431 ctlr->imu_delta_samples_count++;
1432 if (ctlr->imu_delta_samples_count >=
1433 JC_IMU_SAMPLES_PER_DELTA_AVG) {
1434 ctlr->imu_avg_delta_ms = ctlr->imu_delta_samples_sum /
1435 ctlr->imu_delta_samples_count;
1436 ctlr->imu_delta_samples_count = 0;
1437 ctlr->imu_delta_samples_sum = 0;
1438 }
1439
1440 /* don't ever want divide by zero shenanigans */
1441 if (ctlr->imu_avg_delta_ms == 0) {
1442 ctlr->imu_avg_delta_ms = 1;
1443 hid_warn(ctlr->hdev, "calculated avg imu delta of 0\n");
1444 }
1445
1446 /* useful for debugging IMU sample rate */
1447 hid_dbg(ctlr->hdev,
1448 "imu_report: ms=%u last_ms=%u delta=%u avg_delta=%u\n",
1449 msecs, last_msecs, delta, ctlr->imu_avg_delta_ms);
1450
1451 /* check if any packets have been dropped */
1452 dropped_threshold = ctlr->imu_avg_delta_ms * 3 / 2;
1453 dropped_pkts = (delta - min(delta, dropped_threshold)) /
1454 ctlr->imu_avg_delta_ms;
1455 ctlr->imu_timestamp_us += 1000 * ctlr->imu_avg_delta_ms;
1456 if (dropped_pkts > JC_IMU_DROPPED_PKT_WARNING) {
1457 hid_warn(ctlr->hdev,
1458 "compensating for %u dropped IMU reports\n",
1459 dropped_pkts);
1460 hid_warn(ctlr->hdev,
1461 "delta=%u avg_delta=%u\n",
1462 delta, ctlr->imu_avg_delta_ms);
1463 }
1464 }
1465 ctlr->imu_last_pkt_ms = msecs;
1466
1467 /* Each IMU input report contains three samples */
1468 for (i = 0; i < 3; i++) {
1469 input_event(dev: idev, EV_MSC, MSC_TIMESTAMP,
1470 value: ctlr->imu_timestamp_us);
1471
1472 /*
1473 * These calculations (which use the controller's calibration
1474 * settings to improve the final values) are based on those
1475 * found in the community's reverse-engineering repo (linked at
1476 * top of driver). For hid-nintendo, we make sure that the final
1477 * value given to userspace is always in terms of the axis
1478 * resolution we provided.
1479 *
1480 * Currently only the gyro calculations subtract the calibration
1481 * offsets from the raw value itself. In testing, doing the same
1482 * for the accelerometer raw values decreased accuracy.
1483 *
1484 * Note that the gyro values are multiplied by the
1485 * precision-saving scaling factor to prevent large inaccuracies
1486 * due to truncation of the resolution value which would
1487 * otherwise occur. To prevent overflow (without resorting to 64
1488 * bit integer math), the mult_frac macro is used.
1489 */
1490 value[0] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
1491 (imu_data[i].gyro_x -
1492 ctlr->gyro_cal.offset[0])),
1493 ctlr->gyro_cal.scale[0],
1494 ctlr->imu_cal_gyro_divisor[0]);
1495 value[1] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
1496 (imu_data[i].gyro_y -
1497 ctlr->gyro_cal.offset[1])),
1498 ctlr->gyro_cal.scale[1],
1499 ctlr->imu_cal_gyro_divisor[1]);
1500 value[2] = mult_frac((JC_IMU_PREC_RANGE_SCALE *
1501 (imu_data[i].gyro_z -
1502 ctlr->gyro_cal.offset[2])),
1503 ctlr->gyro_cal.scale[2],
1504 ctlr->imu_cal_gyro_divisor[2]);
1505
1506 value[3] = ((s32)imu_data[i].accel_x *
1507 ctlr->accel_cal.scale[0]) /
1508 ctlr->imu_cal_accel_divisor[0];
1509 value[4] = ((s32)imu_data[i].accel_y *
1510 ctlr->accel_cal.scale[1]) /
1511 ctlr->imu_cal_accel_divisor[1];
1512 value[5] = ((s32)imu_data[i].accel_z *
1513 ctlr->accel_cal.scale[2]) /
1514 ctlr->imu_cal_accel_divisor[2];
1515
1516 hid_dbg(ctlr->hdev, "raw_gyro: g_x=%d g_y=%d g_z=%d\n",
1517 imu_data[i].gyro_x, imu_data[i].gyro_y,
1518 imu_data[i].gyro_z);
1519 hid_dbg(ctlr->hdev, "raw_accel: a_x=%d a_y=%d a_z=%d\n",
1520 imu_data[i].accel_x, imu_data[i].accel_y,
1521 imu_data[i].accel_z);
1522
1523 /*
1524 * The right joy-con has 2 axes negated, Y and Z. This is due to
1525 * the orientation of the IMU in the controller. We negate those
1526 * axes' values in order to be consistent with the left joy-con
1527 * and the pro controller:
1528 * X: positive is pointing toward the triggers
1529 * Y: positive is pointing to the left
1530 * Z: positive is pointing up (out of the buttons/sticks)
1531 * The axes follow the right-hand rule.
1532 */
1533 if (jc_type_is_joycon(ctlr) && jc_type_has_right(ctlr)) {
1534 int j;
1535
1536 /* negate all but x axis */
1537 for (j = 1; j < 6; ++j) {
1538 if (j == 3)
1539 continue;
1540 value[j] *= -1;
1541 }
1542 }
1543
1544 input_report_abs(dev: idev, ABS_RX, value: value[0]);
1545 input_report_abs(dev: idev, ABS_RY, value: value[1]);
1546 input_report_abs(dev: idev, ABS_RZ, value: value[2]);
1547 input_report_abs(dev: idev, ABS_X, value: value[3]);
1548 input_report_abs(dev: idev, ABS_Y, value: value[4]);
1549 input_report_abs(dev: idev, ABS_Z, value: value[5]);
1550 input_sync(dev: idev);
1551 /* convert to micros and divide by 3 (3 samples per report). */
1552 ctlr->imu_timestamp_us += ctlr->imu_avg_delta_ms * 1000 / 3;
1553 }
1554}
1555
1556static void joycon_handle_rumble_report(struct joycon_ctlr *ctlr, struct joycon_input_report *rep)
1557{
1558 unsigned long flags;
1559 unsigned long msecs = jiffies_to_msecs(j: jiffies);
1560
1561 spin_lock_irqsave(&ctlr->lock, flags);
1562 if (IS_ENABLED(CONFIG_NINTENDO_FF) && rep->vibrator_report &&
1563 ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED &&
1564 (msecs - ctlr->rumble_msecs) >= JC_RUMBLE_PERIOD_MS &&
1565 (ctlr->rumble_queue_head != ctlr->rumble_queue_tail ||
1566 ctlr->rumble_zero_countdown > 0)) {
1567 /*
1568 * When this value reaches 0, we know we've sent multiple
1569 * packets to the controller instructing it to disable rumble.
1570 * We can safely stop sending periodic rumble packets until the
1571 * next ff effect.
1572 */
1573 if (ctlr->rumble_zero_countdown > 0)
1574 ctlr->rumble_zero_countdown--;
1575 queue_work(wq: ctlr->rumble_queue, work: &ctlr->rumble_worker);
1576 }
1577
1578 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1579}
1580
1581static void joycon_parse_battery_status(struct joycon_ctlr *ctlr, struct joycon_input_report *rep)
1582{
1583 u8 tmp;
1584 unsigned long flags;
1585
1586 spin_lock_irqsave(&ctlr->lock, flags);
1587
1588 tmp = rep->bat_con;
1589 ctlr->host_powered = tmp & BIT(0);
1590 ctlr->battery_charging = tmp & BIT(4);
1591 tmp = tmp >> 5;
1592
1593 switch (tmp) {
1594 case 0: /* empty */
1595 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
1596 break;
1597 case 1: /* low */
1598 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
1599 break;
1600 case 2: /* medium */
1601 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
1602 break;
1603 case 3: /* high */
1604 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
1605 break;
1606 case 4: /* full */
1607 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
1608 break;
1609 default:
1610 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
1611 hid_warn(ctlr->hdev, "Invalid battery status\n");
1612 break;
1613 }
1614
1615 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1616}
1617
1618static void joycon_report_left_stick(struct joycon_ctlr *ctlr,
1619 struct joycon_input_report *rep)
1620{
1621 u16 raw_x;
1622 u16 raw_y;
1623 s32 x;
1624 s32 y;
1625
1626 raw_x = hid_field_extract(hid: ctlr->hdev, report: rep->left_stick, offset: 0, n: 12);
1627 raw_y = hid_field_extract(hid: ctlr->hdev, report: rep->left_stick + 1, offset: 4, n: 12);
1628
1629 x = joycon_map_stick_val(cal: &ctlr->left_stick_cal_x, val: raw_x);
1630 y = -joycon_map_stick_val(cal: &ctlr->left_stick_cal_y, val: raw_y);
1631
1632 input_report_abs(dev: ctlr->input, ABS_X, value: x);
1633 input_report_abs(dev: ctlr->input, ABS_Y, value: y);
1634}
1635
1636static void joycon_report_right_stick(struct joycon_ctlr *ctlr,
1637 struct joycon_input_report *rep)
1638{
1639 u16 raw_x;
1640 u16 raw_y;
1641 s32 x;
1642 s32 y;
1643
1644 raw_x = hid_field_extract(hid: ctlr->hdev, report: rep->right_stick, offset: 0, n: 12);
1645 raw_y = hid_field_extract(hid: ctlr->hdev, report: rep->right_stick + 1, offset: 4, n: 12);
1646
1647 x = joycon_map_stick_val(cal: &ctlr->right_stick_cal_x, val: raw_x);
1648 y = -joycon_map_stick_val(cal: &ctlr->right_stick_cal_y, val: raw_y);
1649
1650 input_report_abs(dev: ctlr->input, ABS_RX, value: x);
1651 input_report_abs(dev: ctlr->input, ABS_RY, value: y);
1652}
1653
1654static void joycon_report_dpad(struct joycon_ctlr *ctlr,
1655 struct joycon_input_report *rep)
1656{
1657 int hatx = 0;
1658 int haty = 0;
1659 u32 btns = hid_field_extract(hid: ctlr->hdev, report: rep->button_status, offset: 0, n: 24);
1660
1661 if (btns & JC_BTN_LEFT)
1662 hatx = -1;
1663 else if (btns & JC_BTN_RIGHT)
1664 hatx = 1;
1665
1666 if (btns & JC_BTN_UP)
1667 haty = -1;
1668 else if (btns & JC_BTN_DOWN)
1669 haty = 1;
1670
1671 input_report_abs(dev: ctlr->input, ABS_HAT0X, value: hatx);
1672 input_report_abs(dev: ctlr->input, ABS_HAT0Y, value: haty);
1673}
1674
1675static void joycon_report_buttons(struct joycon_ctlr *ctlr,
1676 struct joycon_input_report *rep,
1677 const struct joycon_ctlr_button_mapping button_mappings[])
1678{
1679 const struct joycon_ctlr_button_mapping *button;
1680 u32 status = hid_field_extract(hid: ctlr->hdev, report: rep->button_status, offset: 0, n: 24);
1681
1682 for (button = button_mappings; button->code; button++)
1683 input_report_key(dev: ctlr->input, code: button->code, value: status & button->bit);
1684}
1685
1686static void joycon_parse_report(struct joycon_ctlr *ctlr,
1687 struct joycon_input_report *rep)
1688{
1689 unsigned long flags;
1690 unsigned long msecs = jiffies_to_msecs(j: jiffies);
1691 unsigned long report_delta_ms = msecs - ctlr->last_input_report_msecs;
1692
1693 if (joycon_has_rumble(ctlr))
1694 joycon_handle_rumble_report(ctlr, rep);
1695
1696 joycon_parse_battery_status(ctlr, rep);
1697
1698 if (joycon_type_is_left_joycon(ctlr)) {
1699 joycon_report_left_stick(ctlr, rep);
1700 joycon_report_buttons(ctlr, rep, button_mappings: left_joycon_button_mappings);
1701 if (!joycon_device_is_chrggrip(ctlr))
1702 joycon_report_buttons(ctlr, rep, button_mappings: left_joycon_s_button_mappings);
1703 } else if (joycon_type_is_right_joycon(ctlr)) {
1704 joycon_report_right_stick(ctlr, rep);
1705 joycon_report_buttons(ctlr, rep, button_mappings: right_joycon_button_mappings);
1706 if (!joycon_device_is_chrggrip(ctlr))
1707 joycon_report_buttons(ctlr, rep, button_mappings: right_joycon_s_button_mappings);
1708 } else if (joycon_type_is_procon(ctlr)) {
1709 joycon_report_left_stick(ctlr, rep);
1710 joycon_report_right_stick(ctlr, rep);
1711 joycon_report_dpad(ctlr, rep);
1712 joycon_report_buttons(ctlr, rep, button_mappings: procon_button_mappings);
1713 } else if (joycon_type_is_any_nescon(ctlr)) {
1714 joycon_report_dpad(ctlr, rep);
1715 joycon_report_buttons(ctlr, rep, button_mappings: nescon_button_mappings);
1716 } else if (joycon_type_is_snescon(ctlr)) {
1717 joycon_report_dpad(ctlr, rep);
1718 joycon_report_buttons(ctlr, rep, button_mappings: snescon_button_mappings);
1719 } else if (joycon_type_is_gencon(ctlr)) {
1720 joycon_report_dpad(ctlr, rep);
1721 joycon_report_buttons(ctlr, rep, button_mappings: gencon_button_mappings);
1722 } else if (joycon_type_is_n64con(ctlr)) {
1723 joycon_report_left_stick(ctlr, rep);
1724 joycon_report_dpad(ctlr, rep);
1725 joycon_report_buttons(ctlr, rep, button_mappings: n64con_button_mappings);
1726 }
1727
1728 input_sync(dev: ctlr->input);
1729
1730 spin_lock_irqsave(&ctlr->lock, flags);
1731 ctlr->last_input_report_msecs = msecs;
1732 /*
1733 * Was this input report a reasonable time delta compared to the prior
1734 * report? We use this information to decide when a safe time is to send
1735 * rumble packets or subcommand packets.
1736 */
1737 if (report_delta_ms >= JC_INPUT_REPORT_MIN_DELTA &&
1738 report_delta_ms <= JC_INPUT_REPORT_MAX_DELTA) {
1739 if (ctlr->consecutive_valid_report_deltas < JC_SUBCMD_VALID_DELTA_REQ)
1740 ctlr->consecutive_valid_report_deltas++;
1741 } else {
1742 ctlr->consecutive_valid_report_deltas = 0;
1743 }
1744 /*
1745 * Our consecutive valid report tracking is only relevant for
1746 * bluetooth-connected controllers. For USB devices, we're beholden to
1747 * USB's underlying polling rate anyway. Always set to the consecutive
1748 * delta requirement.
1749 */
1750 if (ctlr->hdev->bus == BUS_USB)
1751 ctlr->consecutive_valid_report_deltas = JC_SUBCMD_VALID_DELTA_REQ;
1752
1753 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1754
1755 /*
1756 * Immediately after receiving a report is the most reliable time to
1757 * send a subcommand to the controller. Wake any subcommand senders
1758 * waiting for a report.
1759 */
1760 if (unlikely(mutex_is_locked(&ctlr->output_mutex))) {
1761 spin_lock_irqsave(&ctlr->lock, flags);
1762 ctlr->received_input_report = true;
1763 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1764 wake_up(&ctlr->wait);
1765 }
1766
1767 /* parse IMU data if present */
1768 if ((rep->id == JC_INPUT_IMU_DATA) && joycon_has_imu(ctlr))
1769 joycon_parse_imu_report(ctlr, rep);
1770}
1771
1772static int joycon_send_rumble_data(struct joycon_ctlr *ctlr)
1773{
1774 int ret;
1775 unsigned long flags;
1776 struct joycon_rumble_output rumble_output = { 0 };
1777
1778 spin_lock_irqsave(&ctlr->lock, flags);
1779 /*
1780 * If the controller has been removed, just return ENODEV so the LED
1781 * subsystem doesn't print invalid errors on removal.
1782 */
1783 if (ctlr->ctlr_state == JOYCON_CTLR_STATE_REMOVED) {
1784 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1785 return -ENODEV;
1786 }
1787 memcpy(rumble_output.rumble_data,
1788 ctlr->rumble_data[ctlr->rumble_queue_tail],
1789 JC_RUMBLE_DATA_SIZE);
1790 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1791
1792 rumble_output.output_id = JC_OUTPUT_RUMBLE_ONLY;
1793 rumble_output.packet_num = ctlr->subcmd_num;
1794 if (++ctlr->subcmd_num > 0xF)
1795 ctlr->subcmd_num = 0;
1796
1797 joycon_enforce_subcmd_rate(ctlr);
1798
1799 ret = __joycon_hid_send(hdev: ctlr->hdev, data: (u8 *)&rumble_output,
1800 len: sizeof(rumble_output));
1801 return ret;
1802}
1803
1804static void joycon_rumble_worker(struct work_struct *work)
1805{
1806 struct joycon_ctlr *ctlr = container_of(work, struct joycon_ctlr,
1807 rumble_worker);
1808 unsigned long flags;
1809 bool again = true;
1810 int ret;
1811
1812 while (again) {
1813 mutex_lock(&ctlr->output_mutex);
1814 ret = joycon_send_rumble_data(ctlr);
1815 mutex_unlock(lock: &ctlr->output_mutex);
1816
1817 /* -ENODEV means the controller was just unplugged */
1818 spin_lock_irqsave(&ctlr->lock, flags);
1819 if (ret < 0 && ret != -ENODEV &&
1820 ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED)
1821 hid_warn(ctlr->hdev, "Failed to set rumble; e=%d", ret);
1822
1823 ctlr->rumble_msecs = jiffies_to_msecs(j: jiffies);
1824 if (ctlr->rumble_queue_tail != ctlr->rumble_queue_head) {
1825 if (++ctlr->rumble_queue_tail >= JC_RUMBLE_QUEUE_SIZE)
1826 ctlr->rumble_queue_tail = 0;
1827 } else {
1828 again = false;
1829 }
1830 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1831 }
1832}
1833
1834#if IS_ENABLED(CONFIG_NINTENDO_FF)
1835static struct joycon_rumble_freq_data joycon_find_rumble_freq(u16 freq)
1836{
1837 const size_t length = ARRAY_SIZE(joycon_rumble_frequencies);
1838 const struct joycon_rumble_freq_data *data = joycon_rumble_frequencies;
1839 int i = 0;
1840
1841 if (freq > data[0].freq) {
1842 for (i = 1; i < length - 1; i++) {
1843 if (freq > data[i - 1].freq && freq <= data[i].freq)
1844 break;
1845 }
1846 }
1847
1848 return data[i];
1849}
1850
1851static struct joycon_rumble_amp_data joycon_find_rumble_amp(u16 amp)
1852{
1853 const size_t length = ARRAY_SIZE(joycon_rumble_amplitudes);
1854 const struct joycon_rumble_amp_data *data = joycon_rumble_amplitudes;
1855 int i = 0;
1856
1857 if (amp > data[0].amp) {
1858 for (i = 1; i < length - 1; i++) {
1859 if (amp > data[i - 1].amp && amp <= data[i].amp)
1860 break;
1861 }
1862 }
1863
1864 return data[i];
1865}
1866
1867static void joycon_encode_rumble(u8 *data, u16 freq_low, u16 freq_high, u16 amp)
1868{
1869 struct joycon_rumble_freq_data freq_data_low;
1870 struct joycon_rumble_freq_data freq_data_high;
1871 struct joycon_rumble_amp_data amp_data;
1872
1873 freq_data_low = joycon_find_rumble_freq(freq: freq_low);
1874 freq_data_high = joycon_find_rumble_freq(freq: freq_high);
1875 amp_data = joycon_find_rumble_amp(amp);
1876
1877 data[0] = (freq_data_high.high >> 8) & 0xFF;
1878 data[1] = (freq_data_high.high & 0xFF) + amp_data.high;
1879 data[2] = freq_data_low.low + ((amp_data.low >> 8) & 0xFF);
1880 data[3] = amp_data.low & 0xFF;
1881}
1882
1883static const u16 JOYCON_MAX_RUMBLE_HIGH_FREQ = 1253;
1884static const u16 JOYCON_MIN_RUMBLE_HIGH_FREQ = 82;
1885static const u16 JOYCON_MAX_RUMBLE_LOW_FREQ = 626;
1886static const u16 JOYCON_MIN_RUMBLE_LOW_FREQ = 41;
1887
1888static void joycon_clamp_rumble_freqs(struct joycon_ctlr *ctlr)
1889{
1890 unsigned long flags;
1891
1892 spin_lock_irqsave(&ctlr->lock, flags);
1893 ctlr->rumble_ll_freq = clamp(ctlr->rumble_ll_freq,
1894 JOYCON_MIN_RUMBLE_LOW_FREQ,
1895 JOYCON_MAX_RUMBLE_LOW_FREQ);
1896 ctlr->rumble_lh_freq = clamp(ctlr->rumble_lh_freq,
1897 JOYCON_MIN_RUMBLE_HIGH_FREQ,
1898 JOYCON_MAX_RUMBLE_HIGH_FREQ);
1899 ctlr->rumble_rl_freq = clamp(ctlr->rumble_rl_freq,
1900 JOYCON_MIN_RUMBLE_LOW_FREQ,
1901 JOYCON_MAX_RUMBLE_LOW_FREQ);
1902 ctlr->rumble_rh_freq = clamp(ctlr->rumble_rh_freq,
1903 JOYCON_MIN_RUMBLE_HIGH_FREQ,
1904 JOYCON_MAX_RUMBLE_HIGH_FREQ);
1905 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1906}
1907
1908static int joycon_set_rumble(struct joycon_ctlr *ctlr, u16 amp_r, u16 amp_l,
1909 bool schedule_now)
1910{
1911 u8 data[JC_RUMBLE_DATA_SIZE];
1912 u16 amp;
1913 u16 freq_r_low;
1914 u16 freq_r_high;
1915 u16 freq_l_low;
1916 u16 freq_l_high;
1917 unsigned long flags;
1918 int next_rq_head;
1919
1920 spin_lock_irqsave(&ctlr->lock, flags);
1921 freq_r_low = ctlr->rumble_rl_freq;
1922 freq_r_high = ctlr->rumble_rh_freq;
1923 freq_l_low = ctlr->rumble_ll_freq;
1924 freq_l_high = ctlr->rumble_lh_freq;
1925 /* limit number of silent rumble packets to reduce traffic */
1926 if (amp_l != 0 || amp_r != 0)
1927 ctlr->rumble_zero_countdown = JC_RUMBLE_ZERO_AMP_PKT_CNT;
1928 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1929
1930 /* right joy-con */
1931 amp = amp_r * (u32)joycon_max_rumble_amp / 65535;
1932 joycon_encode_rumble(data: data + 4, freq_low: freq_r_low, freq_high: freq_r_high, amp);
1933
1934 /* left joy-con */
1935 amp = amp_l * (u32)joycon_max_rumble_amp / 65535;
1936 joycon_encode_rumble(data, freq_low: freq_l_low, freq_high: freq_l_high, amp);
1937
1938 spin_lock_irqsave(&ctlr->lock, flags);
1939
1940 next_rq_head = ctlr->rumble_queue_head + 1;
1941 if (next_rq_head >= JC_RUMBLE_QUEUE_SIZE)
1942 next_rq_head = 0;
1943
1944 /* Did we overrun the circular buffer?
1945 * If so, be sure we keep the latest intended rumble state.
1946 */
1947 if (next_rq_head == ctlr->rumble_queue_tail) {
1948 hid_dbg(ctlr->hdev, "rumble queue is full");
1949 /* overwrite the prior value at the end of the circular buf */
1950 next_rq_head = ctlr->rumble_queue_head;
1951 }
1952
1953 ctlr->rumble_queue_head = next_rq_head;
1954 memcpy(ctlr->rumble_data[ctlr->rumble_queue_head], data,
1955 JC_RUMBLE_DATA_SIZE);
1956
1957 /* don't wait for the periodic send (reduces latency) */
1958 if (schedule_now && ctlr->ctlr_state != JOYCON_CTLR_STATE_REMOVED)
1959 queue_work(wq: ctlr->rumble_queue, work: &ctlr->rumble_worker);
1960
1961 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
1962
1963 return 0;
1964}
1965
1966static int joycon_play_effect(struct input_dev *dev, void *data,
1967 struct ff_effect *effect)
1968{
1969 struct joycon_ctlr *ctlr = input_get_drvdata(dev);
1970
1971 if (effect->type != FF_RUMBLE)
1972 return 0;
1973
1974 return joycon_set_rumble(ctlr,
1975 amp_r: effect->u.rumble.weak_magnitude,
1976 amp_l: effect->u.rumble.strong_magnitude,
1977 schedule_now: true);
1978}
1979#endif /* IS_ENABLED(CONFIG_NINTENDO_FF) */
1980
1981static void joycon_config_left_stick(struct input_dev *idev)
1982{
1983 input_set_abs_params(dev: idev,
1984 ABS_X,
1985 min: -JC_MAX_STICK_MAG,
1986 JC_MAX_STICK_MAG,
1987 JC_STICK_FUZZ,
1988 JC_STICK_FLAT);
1989 input_set_abs_params(dev: idev,
1990 ABS_Y,
1991 min: -JC_MAX_STICK_MAG,
1992 JC_MAX_STICK_MAG,
1993 JC_STICK_FUZZ,
1994 JC_STICK_FLAT);
1995}
1996
1997static void joycon_config_right_stick(struct input_dev *idev)
1998{
1999 input_set_abs_params(dev: idev,
2000 ABS_RX,
2001 min: -JC_MAX_STICK_MAG,
2002 JC_MAX_STICK_MAG,
2003 JC_STICK_FUZZ,
2004 JC_STICK_FLAT);
2005 input_set_abs_params(dev: idev,
2006 ABS_RY,
2007 min: -JC_MAX_STICK_MAG,
2008 JC_MAX_STICK_MAG,
2009 JC_STICK_FUZZ,
2010 JC_STICK_FLAT);
2011}
2012
2013static void joycon_config_dpad(struct input_dev *idev)
2014{
2015 input_set_abs_params(dev: idev,
2016 ABS_HAT0X,
2017 min: -JC_MAX_DPAD_MAG,
2018 JC_MAX_DPAD_MAG,
2019 JC_DPAD_FUZZ,
2020 JC_DPAD_FLAT);
2021 input_set_abs_params(dev: idev,
2022 ABS_HAT0Y,
2023 min: -JC_MAX_DPAD_MAG,
2024 JC_MAX_DPAD_MAG,
2025 JC_DPAD_FUZZ,
2026 JC_DPAD_FLAT);
2027}
2028
2029static void joycon_config_buttons(struct input_dev *idev,
2030 const struct joycon_ctlr_button_mapping button_mappings[])
2031{
2032 const struct joycon_ctlr_button_mapping *button;
2033
2034 for (button = button_mappings; button->code; button++)
2035 input_set_capability(dev: idev, EV_KEY, code: button->code);
2036}
2037
2038static void joycon_config_rumble(struct joycon_ctlr *ctlr)
2039{
2040#if IS_ENABLED(CONFIG_NINTENDO_FF)
2041 /* set up rumble */
2042 input_set_capability(dev: ctlr->input, EV_FF, FF_RUMBLE);
2043 input_ff_create_memless(dev: ctlr->input, NULL, play_effect: joycon_play_effect);
2044 ctlr->rumble_ll_freq = JC_RUMBLE_DFLT_LOW_FREQ;
2045 ctlr->rumble_lh_freq = JC_RUMBLE_DFLT_HIGH_FREQ;
2046 ctlr->rumble_rl_freq = JC_RUMBLE_DFLT_LOW_FREQ;
2047 ctlr->rumble_rh_freq = JC_RUMBLE_DFLT_HIGH_FREQ;
2048 joycon_clamp_rumble_freqs(ctlr);
2049 joycon_set_rumble(ctlr, amp_r: 0, amp_l: 0, schedule_now: false);
2050 ctlr->rumble_msecs = jiffies_to_msecs(j: jiffies);
2051#endif
2052}
2053
2054static int joycon_imu_input_create(struct joycon_ctlr *ctlr)
2055{
2056 struct hid_device *hdev;
2057 const char *imu_name;
2058 int ret;
2059
2060 hdev = ctlr->hdev;
2061
2062 /* configure the imu input device */
2063 ctlr->imu_input = devm_input_allocate_device(&hdev->dev);
2064 if (!ctlr->imu_input)
2065 return -ENOMEM;
2066
2067 ctlr->imu_input->id.bustype = hdev->bus;
2068 ctlr->imu_input->id.vendor = hdev->vendor;
2069 ctlr->imu_input->id.product = hdev->product;
2070 ctlr->imu_input->id.version = hdev->version;
2071 ctlr->imu_input->uniq = ctlr->mac_addr_str;
2072 ctlr->imu_input->phys = hdev->phys;
2073
2074 imu_name = devm_kasprintf(dev: &hdev->dev, GFP_KERNEL, fmt: "%s (IMU)", ctlr->input->name);
2075 if (!imu_name)
2076 return -ENOMEM;
2077
2078 ctlr->imu_input->name = imu_name;
2079
2080 input_set_drvdata(dev: ctlr->imu_input, data: ctlr);
2081
2082 /* configure imu axes */
2083 input_set_abs_params(dev: ctlr->imu_input, ABS_X,
2084 min: -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
2085 JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
2086 input_set_abs_params(dev: ctlr->imu_input, ABS_Y,
2087 min: -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
2088 JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
2089 input_set_abs_params(dev: ctlr->imu_input, ABS_Z,
2090 min: -JC_IMU_MAX_ACCEL_MAG, JC_IMU_MAX_ACCEL_MAG,
2091 JC_IMU_ACCEL_FUZZ, JC_IMU_ACCEL_FLAT);
2092 input_abs_set_res(dev: ctlr->imu_input, ABS_X, JC_IMU_ACCEL_RES_PER_G);
2093 input_abs_set_res(dev: ctlr->imu_input, ABS_Y, JC_IMU_ACCEL_RES_PER_G);
2094 input_abs_set_res(dev: ctlr->imu_input, ABS_Z, JC_IMU_ACCEL_RES_PER_G);
2095
2096 input_set_abs_params(dev: ctlr->imu_input, ABS_RX,
2097 min: -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
2098 JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
2099 input_set_abs_params(dev: ctlr->imu_input, ABS_RY,
2100 min: -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
2101 JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
2102 input_set_abs_params(dev: ctlr->imu_input, ABS_RZ,
2103 min: -JC_IMU_MAX_GYRO_MAG, JC_IMU_MAX_GYRO_MAG,
2104 JC_IMU_GYRO_FUZZ, JC_IMU_GYRO_FLAT);
2105
2106 input_abs_set_res(dev: ctlr->imu_input, ABS_RX, JC_IMU_GYRO_RES_PER_DPS);
2107 input_abs_set_res(dev: ctlr->imu_input, ABS_RY, JC_IMU_GYRO_RES_PER_DPS);
2108 input_abs_set_res(dev: ctlr->imu_input, ABS_RZ, JC_IMU_GYRO_RES_PER_DPS);
2109
2110 __set_bit(EV_MSC, ctlr->imu_input->evbit);
2111 __set_bit(MSC_TIMESTAMP, ctlr->imu_input->mscbit);
2112 __set_bit(INPUT_PROP_ACCELEROMETER, ctlr->imu_input->propbit);
2113
2114 ret = input_register_device(ctlr->imu_input);
2115 if (ret)
2116 return ret;
2117
2118 return 0;
2119}
2120
2121static int joycon_input_create(struct joycon_ctlr *ctlr)
2122{
2123 struct hid_device *hdev;
2124 int ret;
2125
2126 hdev = ctlr->hdev;
2127
2128 ctlr->input = devm_input_allocate_device(&hdev->dev);
2129 if (!ctlr->input)
2130 return -ENOMEM;
2131 ctlr->input->id.bustype = hdev->bus;
2132 ctlr->input->id.vendor = hdev->vendor;
2133 ctlr->input->id.product = hdev->product;
2134 ctlr->input->id.version = hdev->version;
2135 ctlr->input->uniq = ctlr->mac_addr_str;
2136 ctlr->input->name = hdev->name;
2137 ctlr->input->phys = hdev->phys;
2138 input_set_drvdata(dev: ctlr->input, data: ctlr);
2139
2140 ret = input_register_device(ctlr->input);
2141 if (ret)
2142 return ret;
2143
2144 if (joycon_type_is_right_joycon(ctlr)) {
2145 joycon_config_right_stick(idev: ctlr->input);
2146 joycon_config_buttons(idev: ctlr->input, button_mappings: right_joycon_button_mappings);
2147 if (!joycon_device_is_chrggrip(ctlr))
2148 joycon_config_buttons(idev: ctlr->input, button_mappings: right_joycon_s_button_mappings);
2149 } else if (joycon_type_is_left_joycon(ctlr)) {
2150 joycon_config_left_stick(idev: ctlr->input);
2151 joycon_config_buttons(idev: ctlr->input, button_mappings: left_joycon_button_mappings);
2152 if (!joycon_device_is_chrggrip(ctlr))
2153 joycon_config_buttons(idev: ctlr->input, button_mappings: left_joycon_s_button_mappings);
2154 } else if (joycon_type_is_procon(ctlr)) {
2155 joycon_config_left_stick(idev: ctlr->input);
2156 joycon_config_right_stick(idev: ctlr->input);
2157 joycon_config_dpad(idev: ctlr->input);
2158 joycon_config_buttons(idev: ctlr->input, button_mappings: procon_button_mappings);
2159 } else if (joycon_type_is_any_nescon(ctlr)) {
2160 joycon_config_dpad(idev: ctlr->input);
2161 joycon_config_buttons(idev: ctlr->input, button_mappings: nescon_button_mappings);
2162 } else if (joycon_type_is_snescon(ctlr)) {
2163 joycon_config_dpad(idev: ctlr->input);
2164 joycon_config_buttons(idev: ctlr->input, button_mappings: snescon_button_mappings);
2165 } else if (joycon_type_is_gencon(ctlr)) {
2166 joycon_config_dpad(idev: ctlr->input);
2167 joycon_config_buttons(idev: ctlr->input, button_mappings: gencon_button_mappings);
2168 } else if (joycon_type_is_n64con(ctlr)) {
2169 joycon_config_dpad(idev: ctlr->input);
2170 joycon_config_left_stick(idev: ctlr->input);
2171 joycon_config_buttons(idev: ctlr->input, button_mappings: n64con_button_mappings);
2172 }
2173
2174 if (joycon_has_imu(ctlr)) {
2175 ret = joycon_imu_input_create(ctlr);
2176 if (ret)
2177 return ret;
2178 }
2179
2180 if (joycon_has_rumble(ctlr))
2181 joycon_config_rumble(ctlr);
2182
2183 return 0;
2184}
2185
2186/* Because the subcommand sets all the leds at once, the brightness argument is ignored */
2187static int joycon_player_led_brightness_set(struct led_classdev *led,
2188 enum led_brightness brightness)
2189{
2190 struct device *dev = led->dev->parent;
2191 struct hid_device *hdev = to_hid_device(dev);
2192 struct joycon_ctlr *ctlr;
2193 int val = 0;
2194 int i;
2195 int ret;
2196
2197 ctlr = hid_get_drvdata(hdev);
2198 if (!ctlr) {
2199 hid_err(hdev, "No controller data\n");
2200 return -ENODEV;
2201 }
2202
2203 for (i = 0; i < JC_NUM_LEDS; i++)
2204 val |= ctlr->leds[i].brightness << i;
2205
2206 mutex_lock(&ctlr->output_mutex);
2207 ret = joycon_set_player_leds(ctlr, flash: 0, on: val);
2208 mutex_unlock(lock: &ctlr->output_mutex);
2209
2210 return ret;
2211}
2212
2213static int joycon_home_led_brightness_set(struct led_classdev *led,
2214 enum led_brightness brightness)
2215{
2216 struct device *dev = led->dev->parent;
2217 struct hid_device *hdev = to_hid_device(dev);
2218 struct joycon_ctlr *ctlr;
2219 int ret;
2220
2221 ctlr = hid_get_drvdata(hdev);
2222 if (!ctlr) {
2223 hid_err(hdev, "No controller data\n");
2224 return -ENODEV;
2225 }
2226 mutex_lock(&ctlr->output_mutex);
2227 ret = joycon_set_home_led(ctlr, brightness);
2228 mutex_unlock(lock: &ctlr->output_mutex);
2229 return ret;
2230}
2231
2232static DEFINE_IDA(nintendo_player_id_allocator);
2233
2234static int joycon_leds_create(struct joycon_ctlr *ctlr)
2235{
2236 struct hid_device *hdev = ctlr->hdev;
2237 struct device *dev = &hdev->dev;
2238 const char *d_name = dev_name(dev);
2239 struct led_classdev *led;
2240 int led_val = 0;
2241 char *name;
2242 int ret;
2243 int i;
2244 int player_led_pattern;
2245
2246 /* configure the player LEDs */
2247 ctlr->player_id = U32_MAX;
2248 ret = ida_alloc(ida: &nintendo_player_id_allocator, GFP_KERNEL);
2249 if (ret < 0) {
2250 hid_warn(hdev, "Failed to allocate player ID, skipping; ret=%d\n", ret);
2251 goto home_led;
2252 }
2253 ctlr->player_id = ret;
2254 player_led_pattern = ret % JC_NUM_LED_PATTERNS;
2255 hid_info(ctlr->hdev, "assigned player %d led pattern", player_led_pattern + 1);
2256
2257 for (i = 0; i < JC_NUM_LEDS; i++) {
2258 name = devm_kasprintf(dev, GFP_KERNEL, fmt: "%s:%s:%s",
2259 d_name,
2260 "green",
2261 joycon_player_led_names[i]);
2262 if (!name)
2263 return -ENOMEM;
2264
2265 led = &ctlr->leds[i];
2266 led->name = name;
2267 led->brightness = joycon_player_led_patterns[player_led_pattern][i];
2268 led->max_brightness = 1;
2269 led->brightness_set_blocking =
2270 joycon_player_led_brightness_set;
2271 led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE;
2272
2273 led_val |= joycon_player_led_patterns[player_led_pattern][i] << i;
2274 }
2275 mutex_lock(&ctlr->output_mutex);
2276 ret = joycon_set_player_leds(ctlr, flash: 0, on: led_val);
2277 mutex_unlock(lock: &ctlr->output_mutex);
2278 if (ret) {
2279 hid_warn(hdev, "Failed to set players LEDs, skipping registration; ret=%d\n", ret);
2280 goto home_led;
2281 }
2282
2283 for (i = 0; i < JC_NUM_LEDS; i++) {
2284 led = &ctlr->leds[i];
2285 ret = devm_led_classdev_register(parent: &hdev->dev, led_cdev: led);
2286 if (ret) {
2287 hid_err(hdev, "Failed to register player %d LED; ret=%d\n", i + 1, ret);
2288 return ret;
2289 }
2290 }
2291
2292home_led:
2293 /* configure the home LED */
2294 if (jc_type_has_right(ctlr)) {
2295 name = devm_kasprintf(dev, GFP_KERNEL, fmt: "%s:%s:%s",
2296 d_name,
2297 "blue",
2298 LED_FUNCTION_PLAYER5);
2299 if (!name)
2300 return -ENOMEM;
2301
2302 led = &ctlr->home_led;
2303 led->name = name;
2304 led->brightness = 0;
2305 led->max_brightness = 0xF;
2306 led->brightness_set_blocking = joycon_home_led_brightness_set;
2307 led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE;
2308
2309 /* Set the home LED to 0 as default state */
2310 mutex_lock(&ctlr->output_mutex);
2311 ret = joycon_set_home_led(ctlr, brightness: 0);
2312 mutex_unlock(lock: &ctlr->output_mutex);
2313 if (ret) {
2314 hid_warn(hdev, "Failed to set home LED, skipping registration; ret=%d\n", ret);
2315 return 0;
2316 }
2317
2318 ret = devm_led_classdev_register(parent: &hdev->dev, led_cdev: led);
2319 if (ret) {
2320 hid_err(hdev, "Failed to register home LED; ret=%d\n", ret);
2321 return ret;
2322 }
2323 }
2324
2325 return 0;
2326}
2327
2328static int joycon_battery_get_property(struct power_supply *supply,
2329 enum power_supply_property prop,
2330 union power_supply_propval *val)
2331{
2332 struct joycon_ctlr *ctlr = power_supply_get_drvdata(psy: supply);
2333 unsigned long flags;
2334 int ret = 0;
2335 u8 capacity;
2336 bool charging;
2337 bool powered;
2338
2339 spin_lock_irqsave(&ctlr->lock, flags);
2340 capacity = ctlr->battery_capacity;
2341 charging = ctlr->battery_charging;
2342 powered = ctlr->host_powered;
2343 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
2344
2345 switch (prop) {
2346 case POWER_SUPPLY_PROP_PRESENT:
2347 val->intval = 1;
2348 break;
2349 case POWER_SUPPLY_PROP_SCOPE:
2350 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
2351 break;
2352 case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
2353 val->intval = capacity;
2354 break;
2355 case POWER_SUPPLY_PROP_STATUS:
2356 if (charging)
2357 val->intval = POWER_SUPPLY_STATUS_CHARGING;
2358 else if (capacity == POWER_SUPPLY_CAPACITY_LEVEL_FULL &&
2359 powered)
2360 val->intval = POWER_SUPPLY_STATUS_FULL;
2361 else
2362 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
2363 break;
2364 default:
2365 ret = -EINVAL;
2366 break;
2367 }
2368 return ret;
2369}
2370
2371static enum power_supply_property joycon_battery_props[] = {
2372 POWER_SUPPLY_PROP_PRESENT,
2373 POWER_SUPPLY_PROP_CAPACITY_LEVEL,
2374 POWER_SUPPLY_PROP_SCOPE,
2375 POWER_SUPPLY_PROP_STATUS,
2376};
2377
2378static int joycon_power_supply_create(struct joycon_ctlr *ctlr)
2379{
2380 struct hid_device *hdev = ctlr->hdev;
2381 struct power_supply_config supply_config = { .drv_data = ctlr, };
2382 const char * const name_fmt = "nintendo_switch_controller_battery_%s";
2383 int ret = 0;
2384
2385 /* Set initially to unknown before receiving first input report */
2386 ctlr->battery_capacity = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
2387
2388 /* Configure the battery's description */
2389 ctlr->battery_desc.properties = joycon_battery_props;
2390 ctlr->battery_desc.num_properties =
2391 ARRAY_SIZE(joycon_battery_props);
2392 ctlr->battery_desc.get_property = joycon_battery_get_property;
2393 ctlr->battery_desc.type = POWER_SUPPLY_TYPE_BATTERY;
2394 ctlr->battery_desc.use_for_apm = 0;
2395 ctlr->battery_desc.name = devm_kasprintf(dev: &hdev->dev, GFP_KERNEL,
2396 fmt: name_fmt,
2397 dev_name(dev: &hdev->dev));
2398 if (!ctlr->battery_desc.name)
2399 return -ENOMEM;
2400
2401 ctlr->battery = devm_power_supply_register(parent: &hdev->dev,
2402 desc: &ctlr->battery_desc,
2403 cfg: &supply_config);
2404 if (IS_ERR(ptr: ctlr->battery)) {
2405 ret = PTR_ERR(ptr: ctlr->battery);
2406 hid_err(hdev, "Failed to register battery; ret=%d\n", ret);
2407 return ret;
2408 }
2409
2410 return power_supply_powers(psy: ctlr->battery, dev: &hdev->dev);
2411}
2412
2413static int joycon_read_info(struct joycon_ctlr *ctlr)
2414{
2415 int ret;
2416 int i;
2417 int j;
2418 struct joycon_subcmd_request req = { 0 };
2419 struct joycon_input_report *report;
2420
2421 req.subcmd_id = JC_SUBCMD_REQ_DEV_INFO;
2422 ret = joycon_send_subcmd(ctlr, subcmd: &req, data_len: 0, HZ);
2423 if (ret) {
2424 hid_err(ctlr->hdev, "Failed to get joycon info; ret=%d\n", ret);
2425 return ret;
2426 }
2427
2428 report = (struct joycon_input_report *)ctlr->input_buf;
2429
2430 for (i = 4, j = 0; j < 6; i++, j++)
2431 ctlr->mac_addr[j] = report->subcmd_reply.data[i];
2432
2433 ctlr->mac_addr_str = devm_kasprintf(dev: &ctlr->hdev->dev, GFP_KERNEL,
2434 fmt: "%02X:%02X:%02X:%02X:%02X:%02X",
2435 ctlr->mac_addr[0],
2436 ctlr->mac_addr[1],
2437 ctlr->mac_addr[2],
2438 ctlr->mac_addr[3],
2439 ctlr->mac_addr[4],
2440 ctlr->mac_addr[5]);
2441 if (!ctlr->mac_addr_str)
2442 return -ENOMEM;
2443 hid_info(ctlr->hdev, "controller MAC = %s\n", ctlr->mac_addr_str);
2444
2445 /*
2446 * Retrieve the type so we can distinguish the controller type
2447 * Unfortantly the hdev->product can't always be used due to a ?bug?
2448 * with the NSO Genesis controller. Over USB, it will report the
2449 * PID as 0x201E, but over bluetooth it will report the PID as 0x2017
2450 * which is the same as the NSO SNES controller. This is different from
2451 * the rest of the controllers which will report the same PID over USB
2452 * and bluetooth.
2453 */
2454 ctlr->ctlr_type = report->subcmd_reply.data[2];
2455 hid_dbg(ctlr->hdev, "controller type = 0x%02X\n", ctlr->ctlr_type);
2456
2457 return 0;
2458}
2459
2460static int joycon_init(struct hid_device *hdev)
2461{
2462 struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
2463 int ret = 0;
2464
2465 mutex_lock(&ctlr->output_mutex);
2466 /* if handshake command fails, assume ble pro controller */
2467 if (joycon_using_usb(ctlr) && !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ)) {
2468 hid_dbg(hdev, "detected USB controller\n");
2469 /* set baudrate for improved latency */
2470 ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M, HZ);
2471 if (ret) {
2472 /*
2473 * We can function with the default baudrate.
2474 * Provide a warning, and continue on.
2475 */
2476 hid_warn(hdev, "Failed to set baudrate (ret=%d), continuing anyway\n", ret);
2477 }
2478 /* handshake */
2479 ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ);
2480 if (ret) {
2481 hid_err(hdev, "Failed handshake; ret=%d\n", ret);
2482 goto out_unlock;
2483 }
2484 /*
2485 * Set no timeout (to keep controller in USB mode).
2486 * This doesn't send a response, so ignore the timeout.
2487 */
2488 joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT, HZ/10);
2489 } else if (jc_type_is_chrggrip(ctlr)) {
2490 hid_err(hdev, "Failed charging grip handshake\n");
2491 ret = -ETIMEDOUT;
2492 goto out_unlock;
2493 }
2494
2495 /* needed to retrieve the controller type */
2496 ret = joycon_read_info(ctlr);
2497 if (ret) {
2498 hid_err(hdev, "Failed to retrieve controller info; ret=%d\n",
2499 ret);
2500 goto out_unlock;
2501 }
2502
2503 if (joycon_has_joysticks(ctlr)) {
2504 /* get controller calibration data, and parse it */
2505 ret = joycon_request_calibration(ctlr);
2506 if (ret) {
2507 /*
2508 * We can function with default calibration, but it may be
2509 * inaccurate. Provide a warning, and continue on.
2510 */
2511 hid_warn(hdev, "Analog stick positions may be inaccurate\n");
2512 }
2513 }
2514
2515 if (joycon_has_imu(ctlr)) {
2516 /* get IMU calibration data, and parse it */
2517 ret = joycon_request_imu_calibration(ctlr);
2518 if (ret) {
2519 /*
2520 * We can function with default calibration, but it may be
2521 * inaccurate. Provide a warning, and continue on.
2522 */
2523 hid_warn(hdev, "Unable to read IMU calibration data\n");
2524 }
2525
2526 /* Enable the IMU */
2527 ret = joycon_enable_imu(ctlr);
2528 if (ret) {
2529 hid_err(hdev, "Failed to enable the IMU; ret=%d\n", ret);
2530 goto out_unlock;
2531 }
2532 }
2533
2534 /* Set the reporting mode to 0x30, which is the full report mode */
2535 ret = joycon_set_report_mode(ctlr);
2536 if (ret) {
2537 hid_err(hdev, "Failed to set report mode; ret=%d\n", ret);
2538 goto out_unlock;
2539 }
2540
2541 if (joycon_has_rumble(ctlr)) {
2542 /* Enable rumble */
2543 ret = joycon_enable_rumble(ctlr);
2544 if (ret) {
2545 hid_err(hdev, "Failed to enable rumble; ret=%d\n", ret);
2546 goto out_unlock;
2547 }
2548 }
2549
2550out_unlock:
2551 mutex_unlock(lock: &ctlr->output_mutex);
2552 return ret;
2553}
2554
2555/* Common handler for parsing inputs */
2556static int joycon_ctlr_read_handler(struct joycon_ctlr *ctlr, u8 *data,
2557 int size)
2558{
2559 if (data[0] == JC_INPUT_SUBCMD_REPLY || data[0] == JC_INPUT_IMU_DATA ||
2560 data[0] == JC_INPUT_MCU_DATA) {
2561 if (size >= 12) /* make sure it contains the input report */
2562 joycon_parse_report(ctlr,
2563 rep: (struct joycon_input_report *)data);
2564 }
2565
2566 return 0;
2567}
2568
2569static int joycon_ctlr_handle_event(struct joycon_ctlr *ctlr, u8 *data,
2570 int size)
2571{
2572 int ret = 0;
2573 bool match = false;
2574 struct joycon_input_report *report;
2575
2576 if (unlikely(mutex_is_locked(&ctlr->output_mutex)) &&
2577 ctlr->msg_type != JOYCON_MSG_TYPE_NONE) {
2578 switch (ctlr->msg_type) {
2579 case JOYCON_MSG_TYPE_USB:
2580 if (size < 2)
2581 break;
2582 if (data[0] == JC_INPUT_USB_RESPONSE &&
2583 data[1] == ctlr->usb_ack_match)
2584 match = true;
2585 break;
2586 case JOYCON_MSG_TYPE_SUBCMD:
2587 if (size < sizeof(struct joycon_input_report) ||
2588 data[0] != JC_INPUT_SUBCMD_REPLY)
2589 break;
2590 report = (struct joycon_input_report *)data;
2591 if (report->subcmd_reply.id == ctlr->subcmd_ack_match)
2592 match = true;
2593 break;
2594 default:
2595 break;
2596 }
2597
2598 if (match) {
2599 memcpy(ctlr->input_buf, data,
2600 min(size, (int)JC_MAX_RESP_SIZE));
2601 ctlr->msg_type = JOYCON_MSG_TYPE_NONE;
2602 ctlr->received_resp = true;
2603 wake_up(&ctlr->wait);
2604
2605 /* This message has been handled */
2606 return 1;
2607 }
2608 }
2609
2610 if (ctlr->ctlr_state == JOYCON_CTLR_STATE_READ)
2611 ret = joycon_ctlr_read_handler(ctlr, data, size);
2612
2613 return ret;
2614}
2615
2616static int nintendo_hid_event(struct hid_device *hdev,
2617 struct hid_report *report, u8 *raw_data, int size)
2618{
2619 struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
2620
2621 if (size < 1)
2622 return -EINVAL;
2623
2624 return joycon_ctlr_handle_event(ctlr, data: raw_data, size);
2625}
2626
2627static int nintendo_hid_probe(struct hid_device *hdev,
2628 const struct hid_device_id *id)
2629{
2630 int ret;
2631 struct joycon_ctlr *ctlr;
2632
2633 hid_dbg(hdev, "probe - start\n");
2634
2635 ctlr = devm_kzalloc(dev: &hdev->dev, size: sizeof(*ctlr), GFP_KERNEL);
2636 if (!ctlr) {
2637 ret = -ENOMEM;
2638 goto err;
2639 }
2640
2641 ctlr->hdev = hdev;
2642 ctlr->ctlr_state = JOYCON_CTLR_STATE_INIT;
2643 ctlr->rumble_queue_head = 0;
2644 ctlr->rumble_queue_tail = 0;
2645 hid_set_drvdata(hdev, data: ctlr);
2646 mutex_init(&ctlr->output_mutex);
2647 init_waitqueue_head(&ctlr->wait);
2648 spin_lock_init(&ctlr->lock);
2649 ctlr->rumble_queue = alloc_workqueue(fmt: "hid-nintendo-rumble_wq",
2650 flags: WQ_FREEZABLE | WQ_MEM_RECLAIM, max_active: 0);
2651 if (!ctlr->rumble_queue) {
2652 ret = -ENOMEM;
2653 goto err;
2654 }
2655 INIT_WORK(&ctlr->rumble_worker, joycon_rumble_worker);
2656
2657 ret = hid_parse(hdev);
2658 if (ret) {
2659 hid_err(hdev, "HID parse failed\n");
2660 goto err_wq;
2661 }
2662
2663 /*
2664 * Patch the hw version of pro controller/joycons, so applications can
2665 * distinguish between the default HID mappings and the mappings defined
2666 * by the Linux game controller spec. This is important for the SDL2
2667 * library, which has a game controller database, which uses device ids
2668 * in combination with version as a key.
2669 */
2670 hdev->version |= 0x8000;
2671
2672 ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
2673 if (ret) {
2674 hid_err(hdev, "HW start failed\n");
2675 goto err_wq;
2676 }
2677
2678 ret = hid_hw_open(hdev);
2679 if (ret) {
2680 hid_err(hdev, "cannot start hardware I/O\n");
2681 goto err_stop;
2682 }
2683
2684 hid_device_io_start(hid: hdev);
2685
2686 ret = joycon_init(hdev);
2687 if (ret) {
2688 hid_err(hdev, "Failed to initialize controller; ret=%d\n", ret);
2689 goto err_close;
2690 }
2691
2692 /* Initialize the leds */
2693 ret = joycon_leds_create(ctlr);
2694 if (ret) {
2695 hid_err(hdev, "Failed to create leds; ret=%d\n", ret);
2696 goto err_close;
2697 }
2698
2699 /* Initialize the battery power supply */
2700 ret = joycon_power_supply_create(ctlr);
2701 if (ret) {
2702 hid_err(hdev, "Failed to create power_supply; ret=%d\n", ret);
2703 goto err_ida;
2704 }
2705
2706 ret = joycon_input_create(ctlr);
2707 if (ret) {
2708 hid_err(hdev, "Failed to create input device; ret=%d\n", ret);
2709 goto err_ida;
2710 }
2711
2712 ctlr->ctlr_state = JOYCON_CTLR_STATE_READ;
2713
2714 hid_dbg(hdev, "probe - success\n");
2715 return 0;
2716
2717err_ida:
2718 ida_free(&nintendo_player_id_allocator, id: ctlr->player_id);
2719err_close:
2720 hid_hw_close(hdev);
2721err_stop:
2722 hid_hw_stop(hdev);
2723err_wq:
2724 destroy_workqueue(wq: ctlr->rumble_queue);
2725err:
2726 hid_err(hdev, "probe - fail = %d\n", ret);
2727 return ret;
2728}
2729
2730static void nintendo_hid_remove(struct hid_device *hdev)
2731{
2732 struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
2733 unsigned long flags;
2734
2735 hid_dbg(hdev, "remove\n");
2736
2737 /* Prevent further attempts at sending subcommands. */
2738 spin_lock_irqsave(&ctlr->lock, flags);
2739 ctlr->ctlr_state = JOYCON_CTLR_STATE_REMOVED;
2740 spin_unlock_irqrestore(lock: &ctlr->lock, flags);
2741
2742 destroy_workqueue(wq: ctlr->rumble_queue);
2743 ida_free(&nintendo_player_id_allocator, id: ctlr->player_id);
2744
2745 hid_hw_close(hdev);
2746 hid_hw_stop(hdev);
2747}
2748
2749#ifdef CONFIG_PM
2750
2751static int nintendo_hid_resume(struct hid_device *hdev)
2752{
2753 int ret = joycon_init(hdev);
2754
2755 if (ret)
2756 hid_err(hdev, "Failed to restore controller after resume");
2757
2758 return ret;
2759}
2760
2761#endif
2762
2763static const struct hid_device_id nintendo_hid_devices[] = {
2764 { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
2765 USB_DEVICE_ID_NINTENDO_PROCON) },
2766 { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
2767 USB_DEVICE_ID_NINTENDO_SNESCON) },
2768 { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
2769 USB_DEVICE_ID_NINTENDO_GENCON) },
2770 { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
2771 USB_DEVICE_ID_NINTENDO_N64CON) },
2772 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2773 USB_DEVICE_ID_NINTENDO_PROCON) },
2774 { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
2775 USB_DEVICE_ID_NINTENDO_CHRGGRIP) },
2776 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2777 USB_DEVICE_ID_NINTENDO_JOYCONL) },
2778 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2779 USB_DEVICE_ID_NINTENDO_JOYCONR) },
2780 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2781 USB_DEVICE_ID_NINTENDO_SNESCON) },
2782 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2783 USB_DEVICE_ID_NINTENDO_GENCON) },
2784 { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
2785 USB_DEVICE_ID_NINTENDO_N64CON) },
2786 { }
2787};
2788MODULE_DEVICE_TABLE(hid, nintendo_hid_devices);
2789
2790static struct hid_driver nintendo_hid_driver = {
2791 .name = "nintendo",
2792 .id_table = nintendo_hid_devices,
2793 .probe = nintendo_hid_probe,
2794 .remove = nintendo_hid_remove,
2795 .raw_event = nintendo_hid_event,
2796
2797#ifdef CONFIG_PM
2798 .resume = nintendo_hid_resume,
2799#endif
2800};
2801static int __init nintendo_init(void)
2802{
2803 return hid_register_driver(&nintendo_hid_driver);
2804}
2805
2806static void __exit nintendo_exit(void)
2807{
2808 hid_unregister_driver(&nintendo_hid_driver);
2809 ida_destroy(ida: &nintendo_player_id_allocator);
2810}
2811
2812module_init(nintendo_init);
2813module_exit(nintendo_exit);
2814
2815MODULE_LICENSE("GPL");
2816MODULE_AUTHOR("Ryan McClelland <rymcclel@gmail.com>");
2817MODULE_AUTHOR("Emily Strickland <linux@emily.st>");
2818MODULE_AUTHOR("Daniel J. Ogorchock <djogorchock@gmail.com>");
2819MODULE_DESCRIPTION("Driver for Nintendo Switch Controllers");
2820

source code of linux/drivers/hid/hid-nintendo.c